diff options
63 files changed, 13517 insertions, 10044 deletions
diff --git a/common/cmd_yaffs2.c b/common/cmd_yaffs2.c index 0e22d90..d43a9d4 100644 --- a/common/cmd_yaffs2.c +++ b/common/cmd_yaffs2.c @@ -1,18 +1,37 @@ +/* Yaffs commands. + * Modified by Charles Manning by adding ydevconfig command. + * + * Use ydevconfig to configure a mountpoint before use. + * For example: + * # Configure mountpt xxx using nand device 0 using blocks 100-500 + * ydevconfig xxx 0 100 500 + * # Mount it + * ymount xxx + * # yls, yrdm etc + * yls -l xxx + * yrdm xxx/boot-image 82000000 + * ... + */ + #include <common.h> #include <config.h> #include <command.h> -#ifdef YAFFS2_DEBUG -#define PRINTF(fmt,args...) printf (fmt ,##args) +#ifdef YAFFS2_DEBUG +#define PRINTF(fmt, args...) printf(fmt, ##args) #else -#define PRINTF(fmt,args...) +#define PRINTF(fmt, args...) do { } while (0) #endif +extern void cmd_yaffs_dev_ls(void); +extern void cmd_yaffs_tracemask(unsigned set, unsigned mask); +extern void cmd_yaffs_devconfig(char *mp, int flash_dev, + int start_block, int end_block); extern void cmd_yaffs_mount(char *mp); extern void cmd_yaffs_umount(char *mp); extern void cmd_yaffs_read_file(char *fn); -extern void cmd_yaffs_write_file(char *fn,char bval,int sizeOfFile); +extern void cmd_yaffs_write_file(char *fn, char bval, int sizeOfFile); extern void cmd_yaffs_ls(const char *mountpt, int longlist); extern void cmd_yaffs_mwrite_file(char *fn, char *addr, int size); extern void cmd_yaffs_mread_file(char *fn, char *addr); @@ -21,193 +40,287 @@ extern void cmd_yaffs_rmdir(const char *dir); extern void cmd_yaffs_rm(const char *path); extern void cmd_yaffs_mv(const char *oldPath, const char *newPath); -extern int yaffs_DumpDevStruct(const char *path); +extern int yaffs_dump_dev(const char *path); + +/* ytrace - show/set yaffs trace mask */ +int do_ytrace(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) +{ + if (argc > 1) + cmd_yaffs_tracemask(1, simple_strtol(argv[1], NULL, 16)); + else + cmd_yaffs_tracemask(0, 0); + return 0; +} -int do_ymount (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +/* ydevls - lists yaffs mount points. */ +int do_ydevls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *mtpoint = argv[1]; - cmd_yaffs_mount(mtpoint); + cmd_yaffs_dev_ls(); - return(0); + return 0; } -int do_yumount (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +/* ydevconfig mount_pt mtd_dev_num start_block end_block */ +int do_ydevconfig(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *mtpoint = argv[1]; - cmd_yaffs_umount(mtpoint); + char *mtpoint; + int mtd_dev; + int start_block; + int end_block; + + if (argc != 5) { + printf + ("Bad arguments: ydevconfig mount_pt mtd_dev start_block end_block\n"); + return -1; + } + + mtpoint = argv[1]; + mtd_dev = simple_strtol(argv[2], NULL, 16); + start_block = simple_strtol(argv[3], NULL, 16); + end_block = simple_strtol(argv[4], NULL, 16); - return(0); + cmd_yaffs_devconfig(mtpoint, mtd_dev, start_block, end_block); + + return 0; } -int do_yls (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_ymount(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *dirname = argv[argc-1]; + char *mtpoint; + + if (argc != 2) { + printf("Bad arguments: ymount mount_pt\n"); + return -1; + } + + mtpoint = argv[1]; + printf("Mounting yaffs2 mount point %s\n", mtpoint); - cmd_yaffs_ls(dirname, (argc>2)?1:0); + cmd_yaffs_mount(mtpoint); - return(0); + return 0; } -int do_yrd (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_yumount(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *filename = argv[1]; - printf ("Reading file %s ", filename); + char *mtpoint; - cmd_yaffs_read_file(filename); + if (argc != 2) { + printf("Bad arguments: yumount mount_pt\n"); + return -1; + } - printf ("done\n"); - return(0); + mtpoint = argv[1]; + printf("Unmounting yaffs2 mount point %s\n", mtpoint); + cmd_yaffs_umount(mtpoint); + + return 0; } -int do_ywr (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_yls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *filename = argv[1]; - ulong value = simple_strtoul(argv[2], NULL, 16); - ulong numValues = simple_strtoul(argv[3], NULL, 16); + char *dirname; + + if (argc < 2 || argc > 3 || (argc == 3 && strcmp(argv[1], "-l"))) { + printf("Bad arguments: yls [-l] dir\n"); + return -1; + } - printf ("Writing value (%lx) %lx times to %s... ", value, numValues, filename); + dirname = argv[argc - 1]; - cmd_yaffs_write_file(filename,value,numValues); + cmd_yaffs_ls(dirname, (argc > 2) ? 1 : 0); - printf ("done\n"); - return(0); + return 0; } -int do_yrdm (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_yrd(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *filename = argv[1]; - ulong addr = simple_strtoul(argv[2], NULL, 16); + char *filename; + + if (argc != 2) { + printf("Bad arguments: yrd file_name\n"); + return -1; + } - cmd_yaffs_mread_file(filename, (char *)addr); + filename = argv[1]; - return(0); + printf("Reading file %s ", filename); + + cmd_yaffs_read_file(filename); + + printf("done\n"); + return 0; } -int do_ywrm (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_ywr(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *filename = argv[1]; - ulong addr = simple_strtoul(argv[2], NULL, 16); - ulong size = simple_strtoul(argv[3], NULL, 16); + char *filename; + ulong value; + ulong numValues; + + if (argc != 4) { + printf("Bad arguments: ywr file_name value n_values\n"); + return -1; + } - cmd_yaffs_mwrite_file(filename, (char *)addr, size); + filename = argv[1]; + value = simple_strtoul(argv[2], NULL, 16); + numValues = simple_strtoul(argv[3], NULL, 16); - return(0); + printf("Writing value (%lx) %lx times to %s... ", value, numValues, + filename); + + cmd_yaffs_write_file(filename, value, numValues); + + printf("done\n"); + return 0; } -int do_ymkdir (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_yrdm(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *dirname = argv[1]; + char *filename; + ulong addr; + + if (argc != 3) { + printf("Bad arguments: yrdm file_name addr\n"); + return -1; + } - cmd_yaffs_mkdir(dirname); + filename = argv[1]; + addr = simple_strtoul(argv[2], NULL, 16); - return(0); + cmd_yaffs_mread_file(filename, (char *)addr); + + return 0; } -int do_yrmdir (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_ywrm(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *dirname = argv[1]; + char *filename; + ulong addr; + ulong size; + + if (argc != 4) { + printf("Bad arguments: ywrm file_name addr size\n"); + return -1; + } + + filename = argv[1]; + addr = simple_strtoul(argv[2], NULL, 16); + size = simple_strtoul(argv[3], NULL, 16); - cmd_yaffs_rmdir(dirname); + cmd_yaffs_mwrite_file(filename, (char *)addr, size); - return(0); + return 0; } -int do_yrm (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_ymkdir(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *path = argv[1]; + char *dirname; - cmd_yaffs_rm(path); + if (argc != 2) { + printf("Bad arguments: ymkdir dir_name\n"); + return -1; + } - return(0); + dirname = argv[1]; + cmd_yaffs_mkdir(dirname); + + return 0; } -int do_ymv (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_yrmdir(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *oldPath = argv[1]; - char *newPath = argv[2]; + char *dirname; + + if (argc != 2) { + printf("Bad arguments: yrmdir dir_name\n"); + return -1; + } - cmd_yaffs_mv(newPath, oldPath); + dirname = argv[1]; + cmd_yaffs_rmdir(dirname); - return(0); + return 0; } -int do_ydump (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int do_yrm(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - char *dirname = argv[1]; - if (yaffs_DumpDevStruct(dirname) != 0) - printf("yaffs_DumpDevStruct returning error when dumping path: , %s\n", dirname); - return 0; + char *name; + + if (argc != 2) { + printf("Bad arguments: yrm name\n"); + return -1; + } + + name = argv[1]; + + cmd_yaffs_rm(name); + + return 0; +} + +int do_ymv(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) +{ + char *oldPath; + char *newPath; + + if (argc != 3) { + printf("Bad arguments: ymv old_path new_path\n"); + return -1; + } + + oldPath = argv[1]; + newPath = argv[2]; + + cmd_yaffs_mv(newPath, oldPath); + + return 0; } -U_BOOT_CMD( - ymount, 3, 0, do_ymount, - "mount yaffs", - "" -); - -U_BOOT_CMD( - yumount, 3, 0, do_yumount, - "unmount yaffs", - "" -); - -U_BOOT_CMD( - yls, 4, 0, do_yls, - "yaffs ls", - "[-l] name" -); - -U_BOOT_CMD( - yrd, 2, 0, do_yrd, - "read file from yaffs", - "filename" -); - -U_BOOT_CMD( - ywr, 4, 0, do_ywr, - "write file to yaffs", - "filename value num_vlues" -); - -U_BOOT_CMD( - yrdm, 3, 0, do_yrdm, - "read file to memory from yaffs", - "filename offset" -); - -U_BOOT_CMD( - ywrm, 4, 0, do_ywrm, - "write file from memory to yaffs", - "filename offset size" -); - -U_BOOT_CMD( - ymkdir, 2, 0, do_ymkdir, - "YAFFS mkdir", - "dirname" -); - -U_BOOT_CMD( - yrmdir, 2, 0, do_yrmdir, - "YAFFS rmdir", - "dirname" -); - -U_BOOT_CMD( - yrm, 2, 0, do_yrm, - "YAFFS rm", - "path" -); - -U_BOOT_CMD( - ymv, 4, 0, do_ymv, - "YAFFS mv", - "oldPath newPath" -); - -U_BOOT_CMD( - ydump, 2, 0, do_ydump, - "YAFFS device struct", - "dirname" -); +U_BOOT_CMD(ytrace, 2, 0, do_ytrace, + "show/set yaffs trace mask", + "ytrace [new_mask] show/set yaffs trace mask"); + +U_BOOT_CMD(ydevls, 1, 0, do_ydevls, + "list yaffs mount points", "list yaffs mount points"); + +U_BOOT_CMD(ydevconfig, 5, 0, do_ydevconfig, + "configure yaffs mount point", + "ydevconfig mtpoint mtd_id start_block end_block configures a yaffs2 mount point"); + +U_BOOT_CMD(ymount, 2, 0, do_ymount, + "mount yaffs", "ymount mtpoint mounts a yaffs2 mount point"); + +U_BOOT_CMD(yumount, 2, 0, do_yumount, + "unmount yaffs", "yunmount mtpoint unmounts a yaffs2 mount point"); + +U_BOOT_CMD(yls, 3, 0, do_yls, "yaffs ls", "yls [-l] dirname"); + +U_BOOT_CMD(yrd, 2, 0, do_yrd, + "read file from yaffs", "yrd path read file from yaffs"); + +U_BOOT_CMD(ywr, 4, 0, do_ywr, + "write file to yaffs", + "ywr filename value num_vlues write values to yaffs file"); + +U_BOOT_CMD(yrdm, 3, 0, do_yrdm, + "read file to memory from yaffs", + "yrdm filename offset reads yaffs file into memory"); + +U_BOOT_CMD(ywrm, 4, 0, do_ywrm, + "write file from memory to yaffs", + "ywrm filename offset size writes memory to yaffs file"); + +U_BOOT_CMD(ymkdir, 2, 0, do_ymkdir, + "YAFFS mkdir", "ymkdir dir create a yaffs directory"); + +U_BOOT_CMD(yrmdir, 2, 0, do_yrmdir, + "YAFFS rmdir", "yrmdir dirname removes a yaffs directory"); + +U_BOOT_CMD(yrm, 2, 0, do_yrm, "YAFFS rm", "yrm path removes a yaffs file"); + +U_BOOT_CMD(ymv, 4, 0, do_ymv, + "YAFFS mv", + "ymv old_path new_path moves/rename files within a yaffs mount point"); diff --git a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile index 904d646..31c12af 100644 --- a/fs/yaffs2/Makefile +++ b/fs/yaffs2/Makefile @@ -16,28 +16,43 @@ # # $Id: Makefile,v 1.15 2007/07/18 19:40:38 charles Exp $ -#EXTRA_COMPILE_FLAGS = -DYAFFS_IGNORE_TAGS_ECC include $(TOPDIR)/config.mk LIB = $(obj)libyaffs2.o COBJS-$(CONFIG_YAFFS2) := \ - yaffscfg.o yaffs_ecc.o yaffsfs.o yaffs_guts.o yaffs_packedtags1.o \ - yaffs_tagscompat.o yaffs_packedtags2.o yaffs_tagsvalidity.o \ - yaffs_nand.o yaffs_checkptrw.o yaffs_qsort.o yaffs_mtdif.o \ - yaffs_mtdif2.o + yaffs_allocator.o yaffs_attribs.o yaffs_bitmap.o yaffs_uboot_glue.o\ + yaffs_checkptrw.o yaffs_ecc.o yaffs_error.o \ + yaffsfs.o yaffs_guts.o yaffs_hweight.o yaffs_nameval.o yaffs_nand.o\ + yaffs_packedtags1.o yaffs_packedtags2.o yaffs_qsort.o \ + yaffs_summary.o yaffs_tagscompat.o yaffs_verify.o yaffs_yaffs1.o \ + yaffs_yaffs2.o yaffs_mtdif.o yaffs_mtdif2.o SRCS := $(COBJS-y:.o=.c) OBJS := $(addprefix $(obj),$(COBJS-y)) -# -DCONFIG_YAFFS_NO_YAFFS1 -CFLAGS += -DCONFIG_YAFFS_DIRECT -DCONFIG_YAFFS_SHORT_NAMES_IN_RAM -DCONFIG_YAFFS_YAFFS2 -DLINUX_VERSION_CODE=0x20622 +YCFLAGS = -DCONFIG_YAFFS_DIRECT -DCONFIG_YAFFS_SHORT_NAMES_IN_RAM +YCFLAGS += -DCONFIG_YAFFS_YAFFS2 -DNO_Y_INLINE +YCFLAGS += -DCONFIG_YAFFS_PROVIDE_DEFS -DCONFIG_YAFFSFS_PROVIDE_VALUES + +CFLAGS += $(YCFLAGS) +CPPFLAGS += $(YCFLAGS) all: $(LIB) -$(LIB): $(obj).depend $(OBJS) +$(obj)libyaffs2.a: $(obj).depend $(OBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) + +$(obj)libyaffs2.o: $(obj).depend $(OBJS) $(call cmd_link_o_target, $(OBJS)) +.PHONY: clean distclean +clean: + rm -f $(OBJS) + +distclean: clean + rm -f $(LIB) core *.bak .depend + ######################################################################### # defines $(obj).depend target diff --git a/fs/yaffs2/README-linux b/fs/yaffs2/README-linux deleted file mode 100644 index 3851e36..0000000 --- a/fs/yaffs2/README-linux +++ /dev/null @@ -1,201 +0,0 @@ -Welcome to YAFFS, the first file system developed specifically for NAND flash. - -It is now YAFFS2 - original YAFFS (AYFFS1) only supports 512-byte page -NAND and is now deprectated. YAFFS2 supports 512b page in 'YAFFS1 -compatibility' mode (CONFIG_YAFFS_YAFFS1) and 2K or larger page NAND -in YAFFS2 mode (CONFIG_YAFFS_YAFFS2). - - -A note on licencing -------------------- -YAFFS is available under the GPL and via alternative licensing -arrangements with Aleph One. If you're using YAFFS as a Linux kernel -file system then it will be under the GPL. For use in other situations -you should discuss licensing issues with Aleph One. - - -Terminology ------------ -Page - NAND addressable unit (normally 512b or 2Kbyte size) - can - be read, written, marked bad. Has associated OOB. -Block - Eraseable unit. 64 Pages. (128K on 2K NAND, 32K on 512b NAND) -OOB - 'spare area' of each page for ECC, bad block marked and YAFFS - tags. 16 bytes per 512b - 64 bytes for 2K page size. -Chunk - Basic YAFFS addressable unit. Same size as Page. -Object - YAFFS Object: File, Directory, Link, Device etc. - -YAFFS design ------------- - -YAFFS is a log-structured filesystem. It is designed particularly for -NAND (as opposed to NOR) flash, to be flash-friendly, robust due to -journalling, and to have low RAM and boot time overheads. File data is -stored in 'chunks'. Chunks are the same size as NAND pages. Each page -is marked with file id and chunk number. These marking 'tags' are -stored in the OOB (or 'spare') region of the flash. The chunk number -is determined by dividing the file position by the chunk size. Each -chunk has a number of valid bytes, which equals the page size for all -except the last chunk in a file. - -File 'headers' are stored as the first page in a file, marked as a -different type to data pages. The same mechanism is used to store -directories, device files, links etc. The first page describes which -type of object it is. - -YAFFS2 never re-writes a page, because the spec of NAND chips does not -allow it. (YAFFS1 used to mark a block 'deleted' in the OOB). Deletion -is managed by moving deleted objects to the special, hidden 'unlinked' -directory. These records are preserved until all the pages containing -the object have been erased (We know when this happen by keeping a -count of chunks remaining on the system for each object - when it -reaches zero the object really is gone). - -When data in a file is overwritten, the relevant chunks are replaced -by writing new pages to flash containing the new data but the same -tags. - -Pages are also marked with a short (2 bit) serial number that -increments each time the page at this position is incremented. The -reason for this is that if power loss/crash/other act of demonic -forces happens before the replaced page is marked as discarded, it is -possible to have two pages with the same tags. The serial number is -used to arbitrate. - -A block containing only discarded pages (termed a dirty block) is an -obvious candidate for garbage collection. Otherwise valid pages can be -copied off a block thus rendering the whole block discarded and ready -for garbage collection. - -In theory you don't need to hold the file structure in RAM... you -could just scan the whole flash looking for pages when you need them. -In practice though you'd want better file access times than that! The -mechanism proposed here is to have a list of __u16 page addresses -associated with each file. Since there are 2^18 pages in a 128MB NAND, -a __u16 is insufficient to uniquely identify a page but is does -identify a group of 4 pages - a small enough region to search -exhaustively. This mechanism is clearly expandable to larger NAND -devices - within reason. The RAM overhead with this approach is approx -2 bytes per page - 512kB of RAM for a whole 128MB NAND. - -Boot-time scanning to build the file structure lists only requires -one pass reading NAND. If proper shutdowns happen the current RAM -summary of the filesystem status is saved to flash, called -'checkpointing'. This saves re-scanning the flash on startup, and gives -huge boot/mount time savings. - -YAFFS regenerates its state by 'replaying the tape' - i.e. by -scanning the chunks in their allocation order (i.e. block sequence ID -order), which is usually different form the media block order. Each -block is still only read once - starting from the end of the media and -working back. - -YAFFS tags in YAFFS1 mode: - -18-bit Object ID (2^18 files, i.e. > 260,000 files). File id 0- is not - valid and indicates a deleted page. File od 0x3ffff is also not valid. - Synonymous with inode. -2-bit serial number -20-bit Chunk ID within file. Limit of 2^20 chunks/pages per file (i.e. - > 500MB max file size). Chunk ID 0 is the file header for the file. -10-bit counter of the number of bytes used in the page. -12 bit ECC on tags - -YAFFS tags in YAFFS2 mode: - 4 bytes 32-bit chunk ID - 4 bytes 32-bit object ID - 2 bytes Number of data bytes in this chunk - 4 bytes Sequence number for this block - 3 bytes ECC on tags - 12 bytes ECC on data (3 bytes per 256 bytes of data) - - -Page allocation and garbage collection - -Pages are allocated sequentially from the currently selected block. -When all the pages in the block are filled, another clean block is -selected for allocation. At least two or three clean blocks are -reserved for garbage collection purposes. If there are insufficient -clean blocks available, then a dirty block ( ie one containing only -discarded pages) is erased to free it up as a clean block. If no dirty -blocks are available, then the dirtiest block is selected for garbage -collection. - -Garbage collection is performed by copying the valid data pages into -new data pages thus rendering all the pages in this block dirty and -freeing it up for erasure. I also like the idea of selecting a block -at random some small percentage of the time - thus reducing the chance -of wear differences. - -YAFFS is single-threaded. Garbage-collection is done as a parasitic -task of writing data. So each time some data is written, a bit of -pending garbage collection is done. More pages are garbage-collected -when free space is tight. - - -Flash writing - -YAFFS only ever writes each page once, complying with the requirements -of the most restricitve NAND devices. - -Wear levelling - -This comes as a side-effect of the block-allocation strategy. Data is -always written on the next free block, so they are all used equally. -Blocks containing data that is written but never erased will not get -back into the free list, so wear is levelled over only blocks which -are free or become free, not blocks which never change. - - - -Some helpful info ------------------ - -Formatting a YAFFS device is simply done by erasing it. - -Making an initial filesystem can be tricky because YAFFS uses the OOB -and thus the bytes that get written depend on the YAFFS data (tags), -and the ECC bytes and bad block markers which are dictated by the -hardware and/or the MTD subsystem. The data layout also depends on the -device page size (512b or 2K). Because YAFFS is only responsible for -some of the OOB data, generating a filesystem offline requires -detailed knowledge of what the other parts (MTD and NAND -driver/hardware) are going to do. - -To make a YAFFS filesystem you have 3 options: - -1) Boot the system with an empty NAND device mounted as YAFFS and copy - stuff on. - -2) Make a filesystem image offline, then boot the system and use - MTDutils to write an image to flash. - -3) Make a filesystem image offline and use some tool like a bootloader to - write it to flash. - -Option 1 avoids a lot of issues because all the parts -(YAFFS/MTD/hardware) all take care of their own bits and (if you have -put things together properly) it will 'just work'. YAFFS just needs to -know how many bytes of the OOB it can use. However sometimes it is not -practical. - -Option 2 lets MTD/hardware take care of the ECC so the filesystem -image just had to know which bytes to use for YAFFS Tags. - -Option 3 is hardest as the image creator needs to know exactly what -ECC bytes, endianness and algorithm to use as well as which bytes are -available to YAFFS. - -mkyaffs2image creates an image suitable for option 3 for the -particular case of yaffs2 on 2K page NAND with default MTD layout. - -mkyaffsimage creates an equivalent image for 512b page NAND (i.e. -yaffs1 format). - -Bootloaders ------------ - -A bootloader using YAFFS needs to know how MTD is laying out the OOB -so that it can skip bad blocks. - -YAFFS Tracing -------------- diff --git a/fs/yaffs2/devextras.h b/fs/yaffs2/devextras.h deleted file mode 100644 index f6e5361..0000000 --- a/fs/yaffs2/devextras.h +++ /dev/null @@ -1,275 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * This file is just holds extra declarations used during development. - * Most of these are from kernel includes placed here so we can use them in - * applications. - * - */ - -#ifndef __EXTRAS_H__ -#define __EXTRAS_H__ - -#if defined WIN32 -#define __inline__ __inline -#define new newHack -#endif - -/* XXX U-BOOT XXX */ -#if 1 /* !(defined __KERNEL__) || (defined WIN32) */ - -/* User space defines */ - -/* XXX U-BOOT XXX */ -#if 0 -typedef unsigned char __u8; -typedef unsigned short __u16; -typedef unsigned __u32; -#endif - -#include <asm/types.h> - -/* - * Simple doubly linked list implementation. - * - * Some of the internal functions ("__xxx") are useful when - * manipulating whole lists rather than single entries, as - * sometimes we already know the next/prev entries and we can - * generate better code by using them directly rather than - * using the generic single-entry routines. - */ - -#define prefetch(x) 1 - -struct list_head { - struct list_head *next, *prev; -}; - -#define LIST_HEAD_INIT(name) { &(name), &(name) } - -#define LIST_HEAD(name) \ - struct list_head name = LIST_HEAD_INIT(name) - -#define INIT_LIST_HEAD(ptr) do { \ - (ptr)->next = (ptr); (ptr)->prev = (ptr); \ -} while (0) - -/* - * Insert a new entry between two known consecutive entries. - * - * This is only for internal list manipulation where we know - * the prev/next entries already! - */ -static __inline__ void __list_add(struct list_head *new, - struct list_head *prev, - struct list_head *next) -{ - next->prev = new; - new->next = next; - new->prev = prev; - prev->next = new; -} - -/** - * list_add - add a new entry - * @new: new entry to be added - * @head: list head to add it after - * - * Insert a new entry after the specified head. - * This is good for implementing stacks. - */ -static __inline__ void list_add(struct list_head *new, struct list_head *head) -{ - __list_add(new, head, head->next); -} - -/** - * list_add_tail - add a new entry - * @new: new entry to be added - * @head: list head to add it before - * - * Insert a new entry before the specified head. - * This is useful for implementing queues. - */ -static __inline__ void list_add_tail(struct list_head *new, - struct list_head *head) -{ - __list_add(new, head->prev, head); -} - -/* - * Delete a list entry by making the prev/next entries - * point to each other. - * - * This is only for internal list manipulation where we know - * the prev/next entries already! - */ -static __inline__ void __list_del(struct list_head *prev, - struct list_head *next) -{ - next->prev = prev; - prev->next = next; -} - -/** - * list_del - deletes entry from list. - * @entry: the element to delete from the list. - * Note: list_empty on entry does not return true after this, the entry is - * in an undefined state. - */ -static __inline__ void list_del(struct list_head *entry) -{ - __list_del(entry->prev, entry->next); -} - -/** - * list_del_init - deletes entry from list and reinitialize it. - * @entry: the element to delete from the list. - */ -static __inline__ void list_del_init(struct list_head *entry) -{ - __list_del(entry->prev, entry->next); - INIT_LIST_HEAD(entry); -} - -/** - * list_empty - tests whether a list is empty - * @head: the list to test. - */ -static __inline__ int list_empty(struct list_head *head) -{ - return head->next == head; -} - -/** - * list_splice - join two lists - * @list: the new list to add. - * @head: the place to add it in the first list. - */ -static __inline__ void list_splice(struct list_head *list, - struct list_head *head) -{ - struct list_head *first = list->next; - - if (first != list) { - struct list_head *last = list->prev; - struct list_head *at = head->next; - - first->prev = head; - head->next = first; - - last->next = at; - at->prev = last; - } -} - -/** - * list_entry - get the struct for this entry - * @ptr: the &struct list_head pointer. - * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. - */ -#define list_entry(ptr, type, member) \ - ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member))) - -/** - * list_for_each - iterate over a list - * @pos: the &struct list_head to use as a loop counter. - * @head: the head for your list. - */ -#define list_for_each(pos, head) \ - for (pos = (head)->next, prefetch(pos->next); pos != (head); \ - pos = pos->next, prefetch(pos->next)) - -/** - * list_for_each_safe - iterate over a list safe against removal - * of list entry - * @pos: the &struct list_head to use as a loop counter. - * @n: another &struct list_head to use as temporary storage - * @head: the head for your list. - */ -#define list_for_each_safe(pos, n, head) \ - for (pos = (head)->next, n = pos->next; pos != (head); \ - pos = n, n = pos->next) - -/* - * File types - */ -#define DT_UNKNOWN 0 -#define DT_FIFO 1 -#define DT_CHR 2 -#define DT_DIR 4 -#define DT_BLK 6 -#define DT_REG 8 -#define DT_LNK 10 -#define DT_SOCK 12 -#define DT_WHT 14 - -#ifndef WIN32 -/* XXX U-BOOT XXX */ -#if 0 -#include <sys/stat.h> -#else -#include "common.h" -#endif -#endif - -/* - * Attribute flags. These should be or-ed together to figure out what - * has been changed! - */ -#define ATTR_MODE 1 -#define ATTR_UID 2 -#define ATTR_GID 4 -#define ATTR_SIZE 8 -#define ATTR_ATIME 16 -#define ATTR_MTIME 32 -#define ATTR_CTIME 64 -#define ATTR_ATIME_SET 128 -#define ATTR_MTIME_SET 256 -#define ATTR_FORCE 512 /* Not a change, but a change it */ -#define ATTR_ATTR_FLAG 1024 - -struct iattr { - unsigned int ia_valid; - unsigned ia_mode; - unsigned ia_uid; - unsigned ia_gid; - unsigned ia_size; - unsigned ia_atime; - unsigned ia_mtime; - unsigned ia_ctime; - unsigned int ia_attr_flags; -}; - -#define KERN_DEBUG - -#else - -#ifndef WIN32 -#include <linux/types.h> -#include <linux/list.h> -#include <linux/fs.h> -#include <linux/stat.h> -#endif - -#endif - -#if defined WIN32 -#undef new -#endif - -#endif diff --git a/fs/yaffs2/stdio.h b/fs/yaffs2/stdio.h new file mode 100644 index 0000000..9f379d7 --- /dev/null +++ b/fs/yaffs2/stdio.h @@ -0,0 +1 @@ +/* Dummy header for u-boot */ diff --git a/fs/yaffs2/stdlib.h b/fs/yaffs2/stdlib.h new file mode 100644 index 0000000..9f379d7 --- /dev/null +++ b/fs/yaffs2/stdlib.h @@ -0,0 +1 @@ +/* Dummy header for u-boot */ diff --git a/fs/yaffs2/string.h b/fs/yaffs2/string.h new file mode 100644 index 0000000..6501fa7 --- /dev/null +++ b/fs/yaffs2/string.h @@ -0,0 +1,4 @@ +#include <linux/stddef.h> +#include <linux/string.h> +#include <linux/stat.h> +#include <common.h> diff --git a/fs/yaffs2/yaffs_allocator.c b/fs/yaffs2/yaffs_allocator.c new file mode 100644 index 0000000..611061f --- /dev/null +++ b/fs/yaffs2/yaffs_allocator.c @@ -0,0 +1,356 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_allocator.h" +#include "yaffs_guts.h" +#include "yaffs_trace.h" +#include "yportenv.h" + +/* + * Each entry in yaffs_tnode_list and yaffs_obj_list hold blocks + * of approx 100 objects that are themn allocated singly. + * This is basically a simplified slab allocator. + * + * We don't use the Linux slab allocator because slab does not allow + * us to dump all the objects in one hit when we do a umount and tear + * down all the tnodes and objects. slab requires that we first free + * the individual objects. + * + * Once yaffs has been mainlined I shall try to motivate for a change + * to slab to provide the extra features we need here. + */ + +struct yaffs_tnode_list { + struct yaffs_tnode_list *next; + struct yaffs_tnode *tnodes; +}; + +struct yaffs_obj_list { + struct yaffs_obj_list *next; + struct yaffs_obj *objects; +}; + +struct yaffs_allocator { + int n_tnodes_created; + struct yaffs_tnode *free_tnodes; + int n_free_tnodes; + struct yaffs_tnode_list *alloc_tnode_list; + + int n_obj_created; + struct list_head free_objs; + int n_free_objects; + + struct yaffs_obj_list *allocated_obj_list; +}; + +static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = + (struct yaffs_allocator *)dev->allocator; + struct yaffs_tnode_list *tmp; + + if (!allocator) { + BUG(); + return; + } + + while (allocator->alloc_tnode_list) { + tmp = allocator->alloc_tnode_list->next; + + kfree(allocator->alloc_tnode_list->tnodes); + kfree(allocator->alloc_tnode_list); + allocator->alloc_tnode_list = tmp; + } + + allocator->free_tnodes = NULL; + allocator->n_free_tnodes = 0; + allocator->n_tnodes_created = 0; +} + +static void yaffs_init_raw_tnodes(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = dev->allocator; + + if (!allocator) { + BUG(); + return; + } + + allocator->alloc_tnode_list = NULL; + allocator->free_tnodes = NULL; + allocator->n_free_tnodes = 0; + allocator->n_tnodes_created = 0; +} + +static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes) +{ + struct yaffs_allocator *allocator = + (struct yaffs_allocator *)dev->allocator; + int i; + struct yaffs_tnode *new_tnodes; + u8 *mem; + struct yaffs_tnode *curr; + struct yaffs_tnode *next; + struct yaffs_tnode_list *tnl; + + if (!allocator) { + BUG(); + return YAFFS_FAIL; + } + + if (n_tnodes < 1) + return YAFFS_OK; + + /* make these things */ + new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS); + mem = (u8 *) new_tnodes; + + if (!new_tnodes) { + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs: Could not allocate Tnodes"); + return YAFFS_FAIL; + } + + /* New hookup for wide tnodes */ + for (i = 0; i < n_tnodes - 1; i++) { + curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size]; + next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size]; + curr->internal[0] = next; + } + + curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size]; + curr->internal[0] = allocator->free_tnodes; + allocator->free_tnodes = (struct yaffs_tnode *)mem; + + allocator->n_free_tnodes += n_tnodes; + allocator->n_tnodes_created += n_tnodes; + + /* Now add this bunch of tnodes to a list for freeing up. + * NB If we can't add this to the management list it isn't fatal + * but it just means we can't free this bunch of tnodes later. + */ + tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS); + if (!tnl) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Could not add tnodes to management list"); + return YAFFS_FAIL; + } else { + tnl->tnodes = new_tnodes; + tnl->next = allocator->alloc_tnode_list; + allocator->alloc_tnode_list = tnl; + } + + yaffs_trace(YAFFS_TRACE_ALLOCATE, "Tnodes added"); + + return YAFFS_OK; +} + +struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = + (struct yaffs_allocator *)dev->allocator; + struct yaffs_tnode *tn = NULL; + + if (!allocator) { + BUG(); + return NULL; + } + + /* If there are none left make more */ + if (!allocator->free_tnodes) + yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES); + + if (allocator->free_tnodes) { + tn = allocator->free_tnodes; + allocator->free_tnodes = allocator->free_tnodes->internal[0]; + allocator->n_free_tnodes--; + } + + return tn; +} + +/* FreeTnode frees up a tnode and puts it back on the free list */ +void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) +{ + struct yaffs_allocator *allocator = dev->allocator; + + if (!allocator) { + BUG(); + return; + } + + if (tn) { + tn->internal[0] = allocator->free_tnodes; + allocator->free_tnodes = tn; + allocator->n_free_tnodes++; + } + dev->checkpoint_blocks_required = 0; /* force recalculation */ +} + +/*--------------- yaffs_obj alloaction ------------------------ + * + * Free yaffs_objs are stored in a list using obj->siblings. + * The blocks of allocated objects are stored in a linked list. + */ + +static void yaffs_init_raw_objs(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = dev->allocator; + + if (!allocator) { + BUG(); + return; + } + + allocator->allocated_obj_list = NULL; + INIT_LIST_HEAD(&allocator->free_objs); + allocator->n_free_objects = 0; +} + +static void yaffs_deinit_raw_objs(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = dev->allocator; + struct yaffs_obj_list *tmp; + + if (!allocator) { + BUG(); + return; + } + + while (allocator->allocated_obj_list) { + tmp = allocator->allocated_obj_list->next; + kfree(allocator->allocated_obj_list->objects); + kfree(allocator->allocated_obj_list); + allocator->allocated_obj_list = tmp; + } + + INIT_LIST_HEAD(&allocator->free_objs); + allocator->n_free_objects = 0; + allocator->n_obj_created = 0; +} + +static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj) +{ + struct yaffs_allocator *allocator = dev->allocator; + int i; + struct yaffs_obj *new_objs; + struct yaffs_obj_list *list; + + if (!allocator) { + BUG(); + return YAFFS_FAIL; + } + + if (n_obj < 1) + return YAFFS_OK; + + /* make these things */ + new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS); + list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS); + + if (!new_objs || !list) { + kfree(new_objs); + new_objs = NULL; + kfree(list); + list = NULL; + yaffs_trace(YAFFS_TRACE_ALLOCATE, + "Could not allocate more objects"); + return YAFFS_FAIL; + } + + /* Hook them into the free list */ + for (i = 0; i < n_obj; i++) + list_add(&new_objs[i].siblings, &allocator->free_objs); + + allocator->n_free_objects += n_obj; + allocator->n_obj_created += n_obj; + + /* Now add this bunch of Objects to a list for freeing up. */ + + list->objects = new_objs; + list->next = allocator->allocated_obj_list; + allocator->allocated_obj_list = list; + + return YAFFS_OK; +} + +struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj = NULL; + struct list_head *lh; + struct yaffs_allocator *allocator = dev->allocator; + + if (!allocator) { + BUG(); + return obj; + } + + /* If there are none left make more */ + if (list_empty(&allocator->free_objs)) + yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS); + + if (!list_empty(&allocator->free_objs)) { + lh = allocator->free_objs.next; + obj = list_entry(lh, struct yaffs_obj, siblings); + list_del_init(lh); + allocator->n_free_objects--; + } + + return obj; +} + +void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj) +{ + + struct yaffs_allocator *allocator = dev->allocator; + + if (!allocator) { + BUG(); + return; + } + + /* Link into the free list. */ + list_add(&obj->siblings, &allocator->free_objs); + allocator->n_free_objects++; +} + +void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev) +{ + + if (!dev->allocator) { + BUG(); + return; + } + + yaffs_deinit_raw_tnodes(dev); + yaffs_deinit_raw_objs(dev); + kfree(dev->allocator); + dev->allocator = NULL; +} + +void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator; + + if (dev->allocator) { + BUG(); + return; + } + + allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS); + if (allocator) { + dev->allocator = allocator; + yaffs_init_raw_tnodes(dev); + yaffs_init_raw_objs(dev); + } +} diff --git a/fs/yaffs2/yaffs_allocator.h b/fs/yaffs2/yaffs_allocator.h new file mode 100644 index 0000000..a8cc322 --- /dev/null +++ b/fs/yaffs2/yaffs_allocator.h @@ -0,0 +1,30 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_ALLOCATOR_H__ +#define __YAFFS_ALLOCATOR_H__ + +#include "yaffs_guts.h" + +void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev); +void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev); + +struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev); +void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn); + +struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev); +void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj); + +#endif diff --git a/fs/yaffs2/yaffs_attribs.c b/fs/yaffs2/yaffs_attribs.c new file mode 100644 index 0000000..6966426 --- /dev/null +++ b/fs/yaffs2/yaffs_attribs.c @@ -0,0 +1,152 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_attribs.h" + + +void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh) +{ + obj->yst_uid = oh->yst_uid; + obj->yst_gid = oh->yst_gid; + obj->yst_atime = oh->yst_atime; + obj->yst_mtime = oh->yst_mtime; + obj->yst_ctime = oh->yst_ctime; + obj->yst_rdev = oh->yst_rdev; +} + + +void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj) +{ +#ifdef CONFIG_YAFFS_WINCE + oh->win_atime[0] = obj->win_atime[0]; + oh->win_ctime[0] = obj->win_ctime[0]; + oh->win_mtime[0] = obj->win_mtime[0]; + oh->win_atime[1] = obj->win_atime[1]; + oh->win_ctime[1] = obj->win_ctime[1]; + oh->win_mtime[1] = obj->win_mtime[1]; +#else + oh->yst_uid = obj->yst_uid; + oh->yst_gid = obj->yst_gid; + oh->yst_atime = obj->yst_atime; + oh->yst_mtime = obj->yst_mtime; + oh->yst_ctime = obj->yst_ctime; + oh->yst_rdev = obj->yst_rdev; +#endif + +} + +void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev) +{ + +#ifdef CONFIG_YAFFS_WINCE + yfsd_win_file_time_now(obj->win_atime); + obj->win_ctime[0] = obj->win_mtime[0] = obj->win_atime[0]; + obj->win_ctime[1] = obj->win_mtime[1] = obj->win_atime[1]; + +#else + yaffs_load_current_time(obj, 1, 1); + obj->yst_rdev = rdev; + obj->yst_uid = uid; + obj->yst_gid = gid; +#endif +} + +void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c) +{ +#ifdef CONFIG_YAFFS_WINCE + yfsd_win_file_time_now(the_obj->win_atime); + the_obj->win_ctime[0] = the_obj->win_mtime[0] = + the_obj->win_atime[0]; + the_obj->win_ctime[1] = the_obj->win_mtime[1] = + the_obj->win_atime[1]; + +#else + + obj->yst_mtime = Y_CURRENT_TIME; + if (do_a) + obj->yst_atime = obj->yst_atime; + if (do_c) + obj->yst_ctime = obj->yst_atime; +#endif +} + +loff_t yaffs_get_file_size(struct yaffs_obj *obj) +{ + YCHAR *alias = NULL; + obj = yaffs_get_equivalent_obj(obj); + + switch (obj->variant_type) { + case YAFFS_OBJECT_TYPE_FILE: + return obj->variant.file_variant.file_size; + case YAFFS_OBJECT_TYPE_SYMLINK: + alias = obj->variant.symlink_variant.alias; + if (!alias) + return 0; + return yaffs_strnlen(alias, YAFFS_MAX_ALIAS_LENGTH); + default: + return 0; + } +} + +int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr) +{ + unsigned int valid = attr->ia_valid; + + if (valid & ATTR_MODE) + obj->yst_mode = attr->ia_mode; + if (valid & ATTR_UID) + obj->yst_uid = attr->ia_uid; + if (valid & ATTR_GID) + obj->yst_gid = attr->ia_gid; + + if (valid & ATTR_ATIME) + obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); + if (valid & ATTR_CTIME) + obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); + if (valid & ATTR_MTIME) + obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); + + if (valid & ATTR_SIZE) + yaffs_resize_file(obj, attr->ia_size); + + yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); + + return YAFFS_OK; + +} + +int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr) +{ + unsigned int valid = 0; + + attr->ia_mode = obj->yst_mode; + valid |= ATTR_MODE; + attr->ia_uid = obj->yst_uid; + valid |= ATTR_UID; + attr->ia_gid = obj->yst_gid; + valid |= ATTR_GID; + + Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; + valid |= ATTR_ATIME; + Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; + valid |= ATTR_CTIME; + Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; + valid |= ATTR_MTIME; + + attr->ia_size = yaffs_get_file_size(obj); + valid |= ATTR_SIZE; + + attr->ia_valid = valid; + + return YAFFS_OK; +} diff --git a/fs/yaffs2/yaffs_attribs.h b/fs/yaffs2/yaffs_attribs.h new file mode 100644 index 0000000..5b21b08 --- /dev/null +++ b/fs/yaffs2/yaffs_attribs.h @@ -0,0 +1,28 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_ATTRIBS_H__ +#define __YAFFS_ATTRIBS_H__ + +#include "yaffs_guts.h" + +void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh); +void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj); +void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev); +void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c); +int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr); +int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr); + +#endif diff --git a/fs/yaffs2/yaffs_bitmap.c b/fs/yaffs2/yaffs_bitmap.c new file mode 100644 index 0000000..4440e93 --- /dev/null +++ b/fs/yaffs2/yaffs_bitmap.c @@ -0,0 +1,97 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_bitmap.h" +#include "yaffs_trace.h" +/* + * Chunk bitmap manipulations + */ + +static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk) +{ + if (blk < dev->internal_start_block || blk > dev->internal_end_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "BlockBits block %d is not valid", + blk); + BUG(); + } + return dev->chunk_bits + + (dev->chunk_bit_stride * (blk - dev->internal_start_block)); +} + +void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk) +{ + if (blk < dev->internal_start_block || blk > dev->internal_end_block || + chunk < 0 || chunk >= dev->param.chunks_per_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Chunk Id (%d:%d) invalid", + blk, chunk); + BUG(); + } +} + +void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + + memset(blk_bits, 0, dev->chunk_bit_stride); +} + +void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + + yaffs_verify_chunk_bit_id(dev, blk, chunk); + blk_bits[chunk / 8] &= ~(1 << (chunk & 7)); +} + +void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + + yaffs_verify_chunk_bit_id(dev, blk, chunk); + blk_bits[chunk / 8] |= (1 << (chunk & 7)); +} + +int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + + yaffs_verify_chunk_bit_id(dev, blk, chunk); + return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; +} + +int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + int i; + + for (i = 0; i < dev->chunk_bit_stride; i++) { + if (*blk_bits) + return 1; + blk_bits++; + } + return 0; +} + +int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + int i; + int n = 0; + + for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++) + n += hweight8(*blk_bits); + + return n; +} diff --git a/fs/yaffs2/yaffs_bitmap.h b/fs/yaffs2/yaffs_bitmap.h new file mode 100644 index 0000000..e26b37d --- /dev/null +++ b/fs/yaffs2/yaffs_bitmap.h @@ -0,0 +1,33 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +/* + * Chunk bitmap manipulations + */ + +#ifndef __YAFFS_BITMAP_H__ +#define __YAFFS_BITMAP_H__ + +#include "yaffs_guts.h" + +void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk); +void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk); +void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); +void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); +int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); +int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk); +int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk); + +#endif diff --git a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c index 230f78f..997a618 100644 --- a/fs/yaffs2/yaffs_checkptrw.c +++ b/fs/yaffs2/yaffs_checkptrw.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,395 +11,398 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> -#include <malloc.h> - -const char *yaffs_checkptrw_c_version = - "$Id: yaffs_checkptrw.c,v 1.14 2007/05/15 20:07:40 charles Exp $"; - - #include "yaffs_checkptrw.h" +#include "yaffs_getblockinfo.h" - -static int yaffs_CheckpointSpaceOk(yaffs_Device *dev) +static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev) { + int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks; - int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "checkpt blocks_avail = %d", blocks_avail); - T(YAFFS_TRACE_CHECKPOINT, - (TSTR("checkpt blocks available = %d" TENDSTR), - blocksAvailable)); - - - return (blocksAvailable <= 0) ? 0 : 1; + return (blocks_avail <= 0) ? 0 : 1; } - -static int yaffs_CheckpointErase(yaffs_Device *dev) +static int yaffs_checkpt_erase(struct yaffs_dev *dev) { - int i; - - if(!dev->eraseBlockInNAND) + if (!dev->param.erase_fn) return 0; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("checking blocks %d to %d"TENDSTR), - dev->internalStartBlock,dev->internalEndBlock)); - - for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); - if(bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("erasing checkpt block %d"TENDSTR),i)); - if(dev->eraseBlockInNAND(dev,i- dev->blockOffset /* realign */)){ - bi->blockState = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - dev->nFreeChunks += dev->nChunksPerBlock; - } - else { - dev->markNANDBlockBad(dev,i); - bi->blockState = YAFFS_BLOCK_STATE_DEAD; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "checking blocks %d to %d", + dev->internal_start_block, dev->internal_end_block); + + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + struct yaffs_block_info *bi = yaffs_get_block_info(dev, i); + if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "erasing checkpt block %d", i); + + dev->n_erasures++; + + if (dev->param. + erase_fn(dev, + i - dev->block_offset /* realign */)) { + bi->block_state = YAFFS_BLOCK_STATE_EMPTY; + dev->n_erased_blocks++; + dev->n_free_chunks += + dev->param.chunks_per_block; + } else { + dev->param.bad_block_fn(dev, i); + bi->block_state = YAFFS_BLOCK_STATE_DEAD; } } } - dev->blocksInCheckpoint = 0; + dev->blocks_in_checkpt = 0; return 1; } - -static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev) +static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev) { - int i; - int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; - T(YAFFS_TRACE_CHECKPOINT, - (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR), - dev->nErasedBlocks,dev->nReservedBlocks,blocksAvailable,dev->checkpointNextBlock)); - - if(dev->checkpointNextBlock >= 0 && - dev->checkpointNextBlock <= dev->internalEndBlock && - blocksAvailable > 0){ - - for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); - if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY){ - dev->checkpointNextBlock = i + 1; - dev->checkpointCurrentBlock = i; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("allocating checkpt block %d"TENDSTR),i)); + int i; + int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks; + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "allocating checkpt block: erased %d reserved %d avail %d next %d ", + dev->n_erased_blocks, dev->param.n_reserved_blocks, + blocks_avail, dev->checkpt_next_block); + + if (dev->checkpt_next_block >= 0 && + dev->checkpt_next_block <= dev->internal_end_block && + blocks_avail > 0) { + + for (i = dev->checkpt_next_block; i <= dev->internal_end_block; + i++) { + struct yaffs_block_info *bi = + yaffs_get_block_info(dev, i); + if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { + dev->checkpt_next_block = i + 1; + dev->checkpt_cur_block = i; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "allocating checkpt block %d", i); return; } } } - T(YAFFS_TRACE_CHECKPOINT,(TSTR("out of checkpt blocks"TENDSTR))); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks"); - dev->checkpointNextBlock = -1; - dev->checkpointCurrentBlock = -1; + dev->checkpt_next_block = -1; + dev->checkpt_cur_block = -1; } -static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev) +static void yaffs2_checkpt_find_block(struct yaffs_dev *dev) { - int i; - yaffs_ExtendedTags tags; - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR), - dev->blocksInCheckpoint, dev->checkpointNextBlock)); - - if(dev->blocksInCheckpoint < dev->checkpointMaxBlocks) - for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){ - int chunk = i * dev->nChunksPerBlock; - int realignedChunk = chunk - dev->chunkOffset; - - dev->readChunkWithTagsFromNAND(dev,realignedChunk,NULL,&tags); - T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR), - i, tags.objectId,tags.sequenceNumber,tags.eccResult)); - - if(tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA){ + int i; + struct yaffs_ext_tags tags; + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "find next checkpt block: start: blocks %d next %d", + dev->blocks_in_checkpt, dev->checkpt_next_block); + + if (dev->blocks_in_checkpt < dev->checkpt_max_blocks) + for (i = dev->checkpt_next_block; i <= dev->internal_end_block; + i++) { + int chunk = i * dev->param.chunks_per_block; + int realigned_chunk = chunk - dev->chunk_offset; + + dev->param.read_chunk_tags_fn(dev, realigned_chunk, + NULL, &tags); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "find next checkpt block: search: block %d oid %d seq %d eccr %d", + i, tags.obj_id, tags.seq_number, + tags.ecc_result); + + if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) { /* Right kind of block */ - dev->checkpointNextBlock = tags.objectId; - dev->checkpointCurrentBlock = i; - dev->checkpointBlockList[dev->blocksInCheckpoint] = i; - dev->blocksInCheckpoint++; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("found checkpt block %d"TENDSTR),i)); + dev->checkpt_next_block = tags.obj_id; + dev->checkpt_cur_block = i; + dev->checkpt_block_list[dev-> + blocks_in_checkpt] = i; + dev->blocks_in_checkpt++; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "found checkpt block %d", i); return; } } - T(YAFFS_TRACE_CHECKPOINT,(TSTR("found no more checkpt blocks"TENDSTR))); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks"); - dev->checkpointNextBlock = -1; - dev->checkpointCurrentBlock = -1; + dev->checkpt_next_block = -1; + dev->checkpt_cur_block = -1; } - -int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting) +int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing) { + int i; + + dev->checkpt_open_write = writing; /* Got the functions we need? */ - if (!dev->writeChunkWithTagsToNAND || - !dev->readChunkWithTagsFromNAND || - !dev->eraseBlockInNAND || - !dev->markNANDBlockBad) + if (!dev->param.write_chunk_tags_fn || + !dev->param.read_chunk_tags_fn || + !dev->param.erase_fn || !dev->param.bad_block_fn) return 0; - if(forWriting && !yaffs_CheckpointSpaceOk(dev)) + if (writing && !yaffs2_checkpt_space_ok(dev)) return 0; - if(!dev->checkpointBuffer) - dev->checkpointBuffer = YMALLOC_DMA(dev->nDataBytesPerChunk); - if(!dev->checkpointBuffer) + if (!dev->checkpt_buffer) + dev->checkpt_buffer = + kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); + if (!dev->checkpt_buffer) return 0; - - dev->checkpointPageSequence = 0; - - dev->checkpointOpenForWrite = forWriting; - - dev->checkpointByteCount = 0; - dev->checkpointSum = 0; - dev->checkpointXor = 0; - dev->checkpointCurrentBlock = -1; - dev->checkpointCurrentChunk = -1; - dev->checkpointNextBlock = dev->internalStartBlock; + dev->checkpt_page_seq = 0; + dev->checkpt_byte_count = 0; + dev->checkpt_sum = 0; + dev->checkpt_xor = 0; + dev->checkpt_cur_block = -1; + dev->checkpt_cur_chunk = -1; + dev->checkpt_next_block = dev->internal_start_block; /* Erase all the blocks in the checkpoint area */ - if(forWriting){ - memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk); - dev->checkpointByteOffset = 0; - return yaffs_CheckpointErase(dev); + if (writing) { + memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); + dev->checkpt_byte_offs = 0; + return yaffs_checkpt_erase(dev); + } + /* Set to a value that will kick off a read */ + dev->checkpt_byte_offs = dev->data_bytes_per_chunk; + /* A checkpoint block list of 1 checkpoint block per 16 block is + * (hopefully) going to be way more than we need */ + dev->blocks_in_checkpt = 0; + dev->checkpt_max_blocks = + (dev->internal_end_block - dev->internal_start_block) / 16 + 2; + dev->checkpt_block_list = + kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS); + + if (!dev->checkpt_block_list) + return 0; - } else { - int i; - /* Set to a value that will kick off a read */ - dev->checkpointByteOffset = dev->nDataBytesPerChunk; - /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully) - * going to be way more than we need */ - dev->blocksInCheckpoint = 0; - dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2; - dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks); - for(i = 0; i < dev->checkpointMaxBlocks; i++) - dev->checkpointBlockList[i] = -1; - } + for (i = 0; i < dev->checkpt_max_blocks; i++) + dev->checkpt_block_list[i] = -1; return 1; } -int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum) +int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum) { - __u32 compositeSum; - compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF); - *sum = compositeSum; + u32 composite_sum; + + composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xff); + *sum = composite_sum; return 1; } -static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev) +static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev) { - int chunk; - int realignedChunk; - - yaffs_ExtendedTags tags; + int realigned_chunk; + struct yaffs_ext_tags tags; - if(dev->checkpointCurrentBlock < 0){ - yaffs_CheckpointFindNextErasedBlock(dev); - dev->checkpointCurrentChunk = 0; + if (dev->checkpt_cur_block < 0) { + yaffs2_checkpt_find_erased_block(dev); + dev->checkpt_cur_chunk = 0; } - if(dev->checkpointCurrentBlock < 0) + if (dev->checkpt_cur_block < 0) return 0; - tags.chunkDeleted = 0; - tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */ - tags.chunkId = dev->checkpointPageSequence + 1; - tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA; - tags.byteCount = dev->nDataBytesPerChunk; - if(dev->checkpointCurrentChunk == 0){ + tags.is_deleted = 0; + tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */ + tags.chunk_id = dev->checkpt_page_seq + 1; + tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA; + tags.n_bytes = dev->data_bytes_per_chunk; + if (dev->checkpt_cur_chunk == 0) { /* First chunk we write for the block? Set block state to checkpoint */ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointCurrentBlock); - bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; - dev->blocksInCheckpoint++; + struct yaffs_block_info *bi = + yaffs_get_block_info(dev, dev->checkpt_cur_block); + bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; + dev->blocks_in_checkpt++; } - chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk; + chunk = + dev->checkpt_cur_block * dev->param.chunks_per_block + + dev->checkpt_cur_chunk; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d", + chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk, + tags.obj_id, tags.chunk_id); - T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR), - chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk,tags.objectId,tags.chunkId)); + realigned_chunk = chunk - dev->chunk_offset; - realignedChunk = chunk - dev->chunkOffset; + dev->n_page_writes++; - dev->writeChunkWithTagsToNAND(dev,realignedChunk,dev->checkpointBuffer,&tags); - dev->checkpointByteOffset = 0; - dev->checkpointPageSequence++; - dev->checkpointCurrentChunk++; - if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock){ - dev->checkpointCurrentChunk = 0; - dev->checkpointCurrentBlock = -1; + dev->param.write_chunk_tags_fn(dev, realigned_chunk, + dev->checkpt_buffer, &tags); + dev->checkpt_byte_offs = 0; + dev->checkpt_page_seq++; + dev->checkpt_cur_chunk++; + if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) { + dev->checkpt_cur_chunk = 0; + dev->checkpt_cur_block = -1; } - memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk); + memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); return 1; } - -int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes) +int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes) { - int i=0; + int i = 0; int ok = 1; + u8 *data_bytes = (u8 *) data; - - __u8 * dataBytes = (__u8 *)data; - - - - if(!dev->checkpointBuffer) + if (!dev->checkpt_buffer) return 0; - if(!dev->checkpointOpenForWrite) + if (!dev->checkpt_open_write) return -1; - while(i < nBytes && ok) { - - - - dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ; - dev->checkpointSum += *dataBytes; - dev->checkpointXor ^= *dataBytes; + while (i < n_bytes && ok) { + dev->checkpt_buffer[dev->checkpt_byte_offs] = *data_bytes; + dev->checkpt_sum += *data_bytes; + dev->checkpt_xor ^= *data_bytes; - dev->checkpointByteOffset++; + dev->checkpt_byte_offs++; i++; - dataBytes++; - dev->checkpointByteCount++; - - - if(dev->checkpointByteOffset < 0 || - dev->checkpointByteOffset >= dev->nDataBytesPerChunk) - ok = yaffs_CheckpointFlushBuffer(dev); + data_bytes++; + dev->checkpt_byte_count++; + if (dev->checkpt_byte_offs < 0 || + dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) + ok = yaffs2_checkpt_flush_buffer(dev); } - return i; + return i; } -int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) +int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes) { - int i=0; + int i = 0; int ok = 1; - yaffs_ExtendedTags tags; - - + struct yaffs_ext_tags tags; int chunk; - int realignedChunk; + int realigned_chunk; + u8 *data_bytes = (u8 *) data; - __u8 *dataBytes = (__u8 *)data; - - if(!dev->checkpointBuffer) + if (!dev->checkpt_buffer) return 0; - if(dev->checkpointOpenForWrite) + if (dev->checkpt_open_write) return -1; - while(i < nBytes && ok) { - + while (i < n_bytes && ok) { - if(dev->checkpointByteOffset < 0 || - dev->checkpointByteOffset >= dev->nDataBytesPerChunk) { + if (dev->checkpt_byte_offs < 0 || + dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) { - if(dev->checkpointCurrentBlock < 0){ - yaffs_CheckpointFindNextCheckpointBlock(dev); - dev->checkpointCurrentChunk = 0; + if (dev->checkpt_cur_block < 0) { + yaffs2_checkpt_find_block(dev); + dev->checkpt_cur_chunk = 0; } - if(dev->checkpointCurrentBlock < 0) + if (dev->checkpt_cur_block < 0) { ok = 0; - else { + break; + } - chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + - dev->checkpointCurrentChunk; + chunk = dev->checkpt_cur_block * + dev->param.chunks_per_block + + dev->checkpt_cur_chunk; - realignedChunk = chunk - dev->chunkOffset; + realigned_chunk = chunk - dev->chunk_offset; + dev->n_page_reads++; - /* read in the next chunk */ - /* printf("read checkpoint page %d\n",dev->checkpointPage); */ - dev->readChunkWithTagsFromNAND(dev, realignedChunk, - dev->checkpointBuffer, - &tags); + /* read in the next chunk */ + dev->param.read_chunk_tags_fn(dev, + realigned_chunk, + dev->checkpt_buffer, + &tags); - if(tags.chunkId != (dev->checkpointPageSequence + 1) || - tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA) - ok = 0; + if (tags.chunk_id != (dev->checkpt_page_seq + 1) || + tags.ecc_result > YAFFS_ECC_RESULT_FIXED || + tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA) { + ok = 0; + break; + } - dev->checkpointByteOffset = 0; - dev->checkpointPageSequence++; - dev->checkpointCurrentChunk++; + dev->checkpt_byte_offs = 0; + dev->checkpt_page_seq++; + dev->checkpt_cur_chunk++; - if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock) - dev->checkpointCurrentBlock = -1; - } + if (dev->checkpt_cur_chunk >= + dev->param.chunks_per_block) + dev->checkpt_cur_block = -1; } - if(ok){ - *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset]; - dev->checkpointSum += *dataBytes; - dev->checkpointXor ^= *dataBytes; - dev->checkpointByteOffset++; - i++; - dataBytes++; - dev->checkpointByteCount++; - } + *data_bytes = dev->checkpt_buffer[dev->checkpt_byte_offs]; + dev->checkpt_sum += *data_bytes; + dev->checkpt_xor ^= *data_bytes; + dev->checkpt_byte_offs++; + i++; + data_bytes++; + dev->checkpt_byte_count++; } - return i; + return i; } -int yaffs_CheckpointClose(yaffs_Device *dev) +int yaffs_checkpt_close(struct yaffs_dev *dev) { + int i; - if(dev->checkpointOpenForWrite){ - if(dev->checkpointByteOffset != 0) - yaffs_CheckpointFlushBuffer(dev); - } else { - int i; - for(i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++){ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointBlockList[i]); - if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY) - bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; - else { - // Todo this looks odd... - } + if (dev->checkpt_open_write) { + if (dev->checkpt_byte_offs != 0) + yaffs2_checkpt_flush_buffer(dev); + } else if (dev->checkpt_block_list) { + for (i = 0; + i < dev->blocks_in_checkpt && + dev->checkpt_block_list[i] >= 0; i++) { + int blk = dev->checkpt_block_list[i]; + struct yaffs_block_info *bi = NULL; + + if (dev->internal_start_block <= blk && + blk <= dev->internal_end_block) + bi = yaffs_get_block_info(dev, blk); + if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY) + bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; } - YFREE(dev->checkpointBlockList); - dev->checkpointBlockList = NULL; + kfree(dev->checkpt_block_list); + dev->checkpt_block_list = NULL; } - dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock; - dev->nErasedBlocks -= dev->blocksInCheckpoint; + dev->n_free_chunks -= + dev->blocks_in_checkpt * dev->param.chunks_per_block; + dev->n_erased_blocks -= dev->blocks_in_checkpt; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, "checkpoint byte count %d", + dev->checkpt_byte_count); - T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint byte count %d" TENDSTR), - dev->checkpointByteCount)); - - if(dev->checkpointBuffer){ + if (dev->checkpt_buffer) { /* free the buffer */ - YFREE(dev->checkpointBuffer); - dev->checkpointBuffer = NULL; + kfree(dev->checkpt_buffer); + dev->checkpt_buffer = NULL; return 1; - } - else + } else { return 0; - + } } -int yaffs_CheckpointInvalidateStream(yaffs_Device *dev) +int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev) { - /* Erase the first checksum block */ - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint invalidate"TENDSTR))); + /* Erase the checkpoint data */ - if(!yaffs_CheckpointSpaceOk(dev)) - return 0; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "checkpoint invalidate of %d blocks", + dev->blocks_in_checkpt); - return yaffs_CheckpointErase(dev); + return yaffs_checkpt_erase(dev); } diff --git a/fs/yaffs2/yaffs_checkptrw.h b/fs/yaffs2/yaffs_checkptrw.h index e59d151..cdbaba7 100644 --- a/fs/yaffs2/yaffs_checkptrw.h +++ b/fs/yaffs2/yaffs_checkptrw.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -18,17 +18,16 @@ #include "yaffs_guts.h" -int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting); +int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing); -int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes); +int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes); -int yaffs_CheckpointRead(yaffs_Device *dev,void *data, int nBytes); +int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes); -int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum); +int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum); -int yaffs_CheckpointClose(yaffs_Device *dev); - -int yaffs_CheckpointInvalidateStream(yaffs_Device *dev); +int yaffs_checkpt_close(struct yaffs_dev *dev); +int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev); #endif diff --git a/fs/yaffs2/yaffs_ecc.c b/fs/yaffs2/yaffs_ecc.c index 1b4a05d..9294107 100644 --- a/fs/yaffs2/yaffs_ecc.c +++ b/fs/yaffs2/yaffs_ecc.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -16,28 +16,22 @@ * * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. * The two unused bit are set to 1. - * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC - * blocks are used on a 512-byte NAND page. + * The ECC can correct single bit errors in a 256-byte page of data. Thus, two + * such ECC blocks are used on a 512-byte NAND page. * */ +#include "yportenv.h" + +#include "yaffs_ecc.h" + /* Table generated by gen-ecc.c * Using a table means we do not have to calculate p1..p4 and p1'..p4' * for each byte of data. These are instead provided in a table in bits7..2. - * Bit 0 of each entry indicates whether the entry has an odd or even parity, and therefore - * this bytes influence on the line parity. + * Bit 0 of each entry indicates whether the entry has an odd or even parity, + * and therefore this bytes influence on the line parity. */ -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_ecc_c_version = - "$Id: yaffs_ecc.c,v 1.9 2007/02/14 01:09:06 wookey Exp $"; - -#include "yportenv.h" - -#include "yaffs_ecc.h" - static const unsigned char column_parity_table[] = { 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, @@ -73,35 +67,11 @@ static const unsigned char column_parity_table[] = { 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, }; -/* Count the bits in an unsigned char or a U32 */ - -static int yaffs_CountBits(unsigned char x) -{ - int r = 0; - while (x) { - if (x & 1) - r++; - x >>= 1; - } - return r; -} - -static int yaffs_CountBits32(unsigned x) -{ - int r = 0; - while (x) { - if (x & 1) - r++; - x >>= 1; - } - return r; -} /* Calculate the ECC for a 256-byte block of data */ -void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc) +void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc) { unsigned int i; - unsigned char col_parity = 0; unsigned char line_parity = 0; unsigned char line_parity_prime = 0; @@ -112,12 +82,10 @@ void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc) b = column_parity_table[*data++]; col_parity ^= b; - if (b & 0x01) // odd number of bits in the byte - { + if (b & 0x01) { /* odd number of bits in the byte */ line_parity ^= i; line_parity_prime ^= ~i; } - } ecc[2] = (~col_parity) | 0x03; @@ -160,19 +128,12 @@ void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc) t |= 0x01; ecc[0] = ~t; -#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER - // Swap the bytes into the wrong order - t = ecc[0]; - ecc[0] = ecc[1]; - ecc[1] = t; -#endif } - /* Correct the ECC on a 256 byte block of data */ -int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc) +int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, + const unsigned char *test_ecc) { unsigned char d0, d1, d2; /* deltas */ @@ -181,7 +142,7 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, d2 = read_ecc[2] ^ test_ecc[2]; if ((d0 | d1 | d2) == 0) - return 0; /* no error */ + return 0; /* no error */ if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 && ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 && @@ -191,15 +152,6 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, unsigned byte; unsigned bit; -#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER - // swap the bytes to correct for the wrong order - unsigned char t; - - t = d0; - d0 = d1; - d1 = t; -#endif - bit = byte = 0; if (d1 & 0x80) @@ -228,19 +180,17 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, data[byte] ^= (1 << bit); - return 1; /* Corrected the error */ + return 1; /* Corrected the error */ } - if ((yaffs_CountBits(d0) + - yaffs_CountBits(d1) + - yaffs_CountBits(d2)) == 1) { + if ((hweight8(d0) + hweight8(d1) + hweight8(d2)) == 1) { /* Reccoverable error in ecc */ read_ecc[0] = test_ecc[0]; read_ecc[1] = test_ecc[1]; read_ecc[2] = test_ecc[2]; - return 1; /* Corrected the error */ + return 1; /* Corrected the error */ } /* Unrecoverable error */ @@ -249,25 +199,23 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, } - /* * ECCxxxOther does ECC calcs on arbitrary n bytes of data */ -void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, - yaffs_ECCOther * eccOther) +void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, + struct yaffs_ecc_other *ecc_other) { unsigned int i; - unsigned char col_parity = 0; unsigned line_parity = 0; unsigned line_parity_prime = 0; unsigned char b; - for (i = 0; i < nBytes; i++) { + for (i = 0; i < n_bytes; i++) { b = column_parity_table[*data++]; col_parity ^= b; - if (b & 0x01) { + if (b & 0x01) { /* odd number of bits in the byte */ line_parity ^= i; line_parity_prime ^= ~i; @@ -275,59 +223,59 @@ void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, } - eccOther->colParity = (col_parity >> 2) & 0x3f; - eccOther->lineParity = line_parity; - eccOther->lineParityPrime = line_parity_prime; + ecc_other->col_parity = (col_parity >> 2) & 0x3f; + ecc_other->line_parity = line_parity; + ecc_other->line_parity_prime = line_parity_prime; } -int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, - yaffs_ECCOther * read_ecc, - const yaffs_ECCOther * test_ecc) +int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, + struct yaffs_ecc_other *read_ecc, + const struct yaffs_ecc_other *test_ecc) { - unsigned char cDelta; /* column parity delta */ - unsigned lDelta; /* line parity delta */ - unsigned lDeltaPrime; /* line parity delta */ + unsigned char delta_col; /* column parity delta */ + unsigned delta_line; /* line parity delta */ + unsigned delta_line_prime; /* line parity delta */ unsigned bit; - cDelta = read_ecc->colParity ^ test_ecc->colParity; - lDelta = read_ecc->lineParity ^ test_ecc->lineParity; - lDeltaPrime = read_ecc->lineParityPrime ^ test_ecc->lineParityPrime; + delta_col = read_ecc->col_parity ^ test_ecc->col_parity; + delta_line = read_ecc->line_parity ^ test_ecc->line_parity; + delta_line_prime = + read_ecc->line_parity_prime ^ test_ecc->line_parity_prime; - if ((cDelta | lDelta | lDeltaPrime) == 0) - return 0; /* no error */ + if ((delta_col | delta_line | delta_line_prime) == 0) + return 0; /* no error */ - if (lDelta == ~lDeltaPrime && - (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15)) - { + if (delta_line == ~delta_line_prime && + (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) { /* Single bit (recoverable) error in data */ bit = 0; - if (cDelta & 0x20) + if (delta_col & 0x20) bit |= 0x04; - if (cDelta & 0x08) + if (delta_col & 0x08) bit |= 0x02; - if (cDelta & 0x02) + if (delta_col & 0x02) bit |= 0x01; - if(lDelta >= nBytes) + if (delta_line >= n_bytes) return -1; - data[lDelta] ^= (1 << bit); + data[delta_line] ^= (1 << bit); - return 1; /* corrected */ + return 1; /* corrected */ } - if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) + - yaffs_CountBits(cDelta)) == 1) { + if ((hweight32(delta_line) + + hweight32(delta_line_prime) + + hweight8(delta_col)) == 1) { /* Reccoverable error in ecc */ *read_ecc = *test_ecc; - return 1; /* corrected */ + return 1; /* corrected */ } /* Unrecoverable error */ return -1; - } diff --git a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h index 79bc3d1..17d47bd 100644 --- a/fs/yaffs2/yaffs_ecc.h +++ b/fs/yaffs2/yaffs_ecc.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -13,32 +13,32 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ - /* - * This code implements the ECC algorithm used in SmartMedia. - * - * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. - * The two unused bit are set to 1. - * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC - * blocks are used on a 512-byte NAND page. - * - */ +/* + * This code implements the ECC algorithm used in SmartMedia. + * + * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. + * The two unused bit are set to 1. + * The ECC can correct single bit errors in a 256-byte page of data. + * Thus, two such ECC blocks are used on a 512-byte NAND page. + * + */ #ifndef __YAFFS_ECC_H__ #define __YAFFS_ECC_H__ -typedef struct { - unsigned char colParity; - unsigned lineParity; - unsigned lineParityPrime; -} yaffs_ECCOther; +struct yaffs_ecc_other { + unsigned char col_parity; + unsigned line_parity; + unsigned line_parity_prime; +}; -void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc); -int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc); +void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc); +int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, + const unsigned char *test_ecc); -void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, - yaffs_ECCOther * ecc); -int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, - yaffs_ECCOther * read_ecc, - const yaffs_ECCOther * test_ecc); +void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, + struct yaffs_ecc_other *ecc); +int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, + struct yaffs_ecc_other *read_ecc, + const struct yaffs_ecc_other *test_ecc); #endif diff --git a/fs/yaffs2/yaffs_error.c b/fs/yaffs2/yaffs_error.c new file mode 100644 index 0000000..11b75f7 --- /dev/null +++ b/fs/yaffs2/yaffs_error.c @@ -0,0 +1,58 @@ +/* + * YAFFS: Yet another FFS. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Timothy Manning <timothy@yaffs.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffsfs.h" + +struct error_entry { + int code; + const char *text; +}; + +static const struct error_entry error_list[] = { + { ENOMEM , "ENOMEM" }, + { EBUSY , "EBUSY"}, + { ENODEV , "ENODEV"}, + { EINVAL , "EINVAL"}, + { EBADF , "EBADF"}, + { EACCES , "EACCES"}, + { EXDEV , "EXDEV" }, + { ENOENT , "ENOENT"}, + { ENOSPC , "ENOSPC"}, + { ERANGE , "ERANGE"}, + { ENODATA, "ENODATA"}, + { ENOTEMPTY, "ENOTEMPTY"}, + { ENAMETOOLONG, "ENAMETOOLONG"}, + { ENOMEM , "ENOMEM"}, + { EEXIST , "EEXIST"}, + { ENOTDIR , "ENOTDIR"}, + { EISDIR , "EISDIR"}, + { ENFILE, "ENFILE"}, + { EROFS, "EROFS"}, + { EFAULT, "EFAULT"}, + { 0, NULL } +}; + +const char *yaffs_error_to_str(int err) +{ + const struct error_entry *e = error_list; + + if (err < 0) + err = -err; + + while (e->code && e->text) { + if (err == e->code) + return e->text; + e++; + } + return "Unknown error code"; +} diff --git a/fs/yaffs2/yaffs_flashif.h b/fs/yaffs2/yaffs_flashif.h index 4e5157e..e6e8979 100644 --- a/fs/yaffs2/yaffs_flashif.h +++ b/fs/yaffs2/yaffs_flashif.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -18,14 +18,18 @@ #include "yaffs_guts.h" -int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int yflash_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare); -int yflash_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_ExtendedTags *tags); -int yflash_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare); -int yflash_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags); -int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int yflash_InitialiseNAND(yaffs_Device *dev); -int yflash_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -int yflash_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber); +int yflash_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber); +int yflash_WriteChunkToNAND(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, const struct yaffs_spare *spare); +int yflash_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, const struct yaffs_ext_tags *tags); +int yflash_ReadChunkFromNAND(struct yaffs_dev *dev, int nand_chunk, + u8 *data, struct yaffs_spare *spare); +int yflash_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, int nand_chunk, + u8 *data, struct yaffs_ext_tags *tags); +int yflash_InitialiseNAND(struct yaffs_dev *dev); +int yflash_MarkNANDBlockBad(struct yaffs_dev *dev, int block_no); +int yflash_QueryNANDBlock(struct yaffs_dev *dev, int block_no, + enum yaffs_block_state *state, u32 *seq_number); #endif diff --git a/fs/yaffs2/yaffs_flashif2.h b/fs/yaffs2/yaffs_flashif2.h new file mode 100644 index 0000000..cfdbde9 --- /dev/null +++ b/fs/yaffs2/yaffs_flashif2.h @@ -0,0 +1,35 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_FLASH2_H__ +#define __YAFFS_FLASH2_H__ + + +#include "yaffs_guts.h" +int yflash2_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber); +int yflash2_WriteChunkToNAND(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, const struct yaffs_spare *spare); +int yflash2_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, const struct yaffs_ext_tags *tags); +int yflash2_ReadChunkFromNAND(struct yaffs_dev *dev, int nand_chunk, + u8 *data, struct yaffs_spare *spare); +int yflash2_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, int nand_chunk, + u8 *data, struct yaffs_ext_tags *tags); +int yflash2_InitialiseNAND(struct yaffs_dev *dev); +int yflash2_MarkNANDBlockBad(struct yaffs_dev *dev, int block_no); +int yflash2_QueryNANDBlock(struct yaffs_dev *dev, int block_no, + enum yaffs_block_state *state, u32 *seq_number); + +#endif diff --git a/fs/yaffs2/yaffs_getblockinfo.h b/fs/yaffs2/yaffs_getblockinfo.h new file mode 100644 index 0000000..8fd0802 --- /dev/null +++ b/fs/yaffs2/yaffs_getblockinfo.h @@ -0,0 +1,35 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_GETBLOCKINFO_H__ +#define __YAFFS_GETBLOCKINFO_H__ + +#include "yaffs_guts.h" +#include "yaffs_trace.h" + +/* Function to manipulate block info */ +static inline struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev + *dev, int blk) +{ + if (blk < dev->internal_start_block || blk > dev->internal_end_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs: get_block_info block %d is not valid", + blk); + BUG(); + } + return &dev->block_info[blk - dev->internal_start_block]; +} + +#endif diff --git a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c index 7390b40..00d1c5a 100644 --- a/fs/yaffs2/yaffs_guts.c +++ b/fs/yaffs2/yaffs_guts.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,259 +11,176 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_guts_c_version = - "$Id: yaffs_guts.c,v 1.52 2007/10/16 00:45:05 charles Exp $"; - #include "yportenv.h" -#include "linux/stat.h" +#include "yaffs_trace.h" -#include "yaffsinterface.h" -#include "yaffsfs.h" #include "yaffs_guts.h" -#include "yaffs_tagsvalidity.h" - +#include "yaffs_getblockinfo.h" #include "yaffs_tagscompat.h" -#ifndef CONFIG_YAFFS_USE_OWN_SORT -#include "yaffs_qsort.h" -#endif #include "yaffs_nand.h" - -#include "yaffs_checkptrw.h" - +#include "yaffs_yaffs1.h" +#include "yaffs_yaffs2.h" +#include "yaffs_bitmap.h" +#include "yaffs_verify.h" #include "yaffs_nand.h" #include "yaffs_packedtags2.h" +#include "yaffs_nameval.h" +#include "yaffs_allocator.h" +#include "yaffs_attribs.h" +#include "yaffs_summary.h" -#include "malloc.h" - -#ifdef CONFIG_YAFFS_WINCE -void yfsd_LockYAFFS(BOOL fsLockOnly); -void yfsd_UnlockYAFFS(BOOL fsLockOnly); -#endif - -#define YAFFS_PASSIVE_GC_CHUNKS 2 +/* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */ +#define YAFFS_GC_GOOD_ENOUGH 2 +#define YAFFS_GC_PASSIVE_THRESHOLD 4 #include "yaffs_ecc.h" +/* Forward declarations */ -/* Robustification (if it ever comes about...) */ -static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND); -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk); -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags); -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_ExtendedTags * tags); - -/* Other local prototypes */ -static int yaffs_UnlinkObject( yaffs_Object *obj); -static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj); - -static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList); - -static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev, - const __u8 * buffer, - yaffs_ExtendedTags * tags, - int useReserve); -static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, - int chunkInNAND, int inScan); - -static yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, - yaffs_ObjectType type); -static void yaffs_AddObjectToDirectory(yaffs_Object * directory, - yaffs_Object * obj); -static int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, - int force, int isShrink, int shadows); -static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj); -static int yaffs_CheckStructures(void); -static int yaffs_DoGenericObjectDeletion(yaffs_Object * in); - -static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blockNo); - -static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo); -static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, - int lineNo); - -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND); - -static int yaffs_UnlinkWorker(yaffs_Object * obj); -static void yaffs_DestroyObject(yaffs_Object * obj); - -static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId, - int chunkInObject); +static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, + const u8 *buffer, int n_bytes, int use_reserve); -loff_t yaffs_GetFileSize(yaffs_Object * obj); -static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr); -static void yaffs_VerifyFreeChunks(yaffs_Device * dev); - -static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in); - -#ifdef YAFFS_PARANOID -static int yaffs_CheckFileSanity(yaffs_Object * in); -#else -#define yaffs_CheckFileSanity(in) -#endif +/* Function to calculate chunk and offset */ -static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in); -static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId); +void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr, + int *chunk_out, u32 *offset_out) +{ + int chunk; + u32 offset; -static void yaffs_InvalidateCheckpoint(yaffs_Device *dev); + chunk = (u32) (addr >> dev->chunk_shift); -static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags); + if (dev->chunk_div == 1) { + /* easy power of 2 case */ + offset = (u32) (addr & dev->chunk_mask); + } else { + /* Non power-of-2 case */ -static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos); -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId); + loff_t chunk_base; + chunk /= dev->chunk_div; -/* Function to calculate chunk and offset */ - -static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, __u32 *chunk, __u32 *offset) -{ - if(dev->chunkShift){ - /* Easy-peasy power of 2 case */ - *chunk = (__u32)(addr >> dev->chunkShift); - *offset = (__u32)(addr & dev->chunkMask); - } - else if(dev->crumbsPerChunk) - { - /* Case where we're using "crumbs" */ - *offset = (__u32)(addr & dev->crumbMask); - addr >>= dev->crumbShift; - *chunk = ((__u32)addr)/dev->crumbsPerChunk; - *offset += ((addr - (*chunk * dev->crumbsPerChunk)) << dev->crumbShift); + chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk; + offset = (u32) (addr - chunk_base); } - else - YBUG(); + + *chunk_out = chunk; + *offset_out = offset; } -/* Function to return the number of shifts for a power of 2 greater than or equal - * to the given number +/* Function to return the number of shifts for a power of 2 greater than or + * equal to the given number * Note we don't try to cater for all possible numbers and this does not have to * be hellishly efficient. */ -static __u32 ShiftsGE(__u32 x) +static inline u32 calc_shifts_ceiling(u32 x) { - int extraBits; - int nShifts; + int extra_bits; + int shifts; - nShifts = extraBits = 0; + shifts = extra_bits = 0; - while(x>1){ - if(x & 1) extraBits++; - x>>=1; - nShifts++; + while (x > 1) { + if (x & 1) + extra_bits++; + x >>= 1; + shifts++; } - if(extraBits) - nShifts++; + if (extra_bits) + shifts++; - return nShifts; + return shifts; } /* Function to return the number of shifts to get a 1 in bit 0 */ -static __u32 ShiftDiv(__u32 x) +static inline u32 calc_shifts(u32 x) { - int nShifts; + u32 shifts; - nShifts = 0; + shifts = 0; - if(!x) return 0; + if (!x) + return 0; - while( !(x&1)){ - x>>=1; - nShifts++; + while (!(x & 1)) { + x >>= 1; + shifts++; } - return nShifts; + return shifts; } - - /* * Temporary buffer manipulations. */ -static int yaffs_InitialiseTempBuffers(yaffs_Device *dev) +static int yaffs_init_tmp_buffers(struct yaffs_dev *dev) { int i; - __u8 *buf = (__u8 *)1; + u8 *buf = (u8 *) 1; - memset(dev->tempBuffer,0,sizeof(dev->tempBuffer)); + memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer)); for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { - dev->tempBuffer[i].line = 0; /* not in use */ - dev->tempBuffer[i].buffer = buf = - YMALLOC_DMA(dev->nDataBytesPerChunk); + dev->temp_buffer[i].in_use = 0; + buf = kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); + dev->temp_buffer[i].buffer = buf; } return buf ? YAFFS_OK : YAFFS_FAIL; - } -static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo) +u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev) { - int i, j; - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].line == 0) { - dev->tempBuffer[i].line = lineNo; - if ((i + 1) > dev->maxTemp) { - dev->maxTemp = i + 1; - for (j = 0; j <= i; j++) - dev->tempBuffer[j].maxLine = - dev->tempBuffer[j].line; - } + int i; - return dev->tempBuffer[i].buffer; - } - } + dev->temp_in_use++; + if (dev->temp_in_use > dev->max_temp) + dev->max_temp = dev->temp_in_use; - T(YAFFS_TRACE_BUFFERS, - (TSTR("Out of temp buffers at line %d, other held by lines:"), - lineNo)); for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line)); + if (dev->temp_buffer[i].in_use == 0) { + dev->temp_buffer[i].in_use = 1; + return dev->temp_buffer[i].buffer; + } } - T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR))); + yaffs_trace(YAFFS_TRACE_BUFFERS, "Out of temp buffers"); /* * If we got here then we have to allocate an unmanaged one * This is not good. */ - dev->unmanagedTempAllocations++; - return YMALLOC(dev->nDataBytesPerChunk); + dev->unmanaged_buffer_allocs++; + return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS); } -static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, - int lineNo) +void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer) { int i; + + dev->temp_in_use--; + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].buffer == buffer) { - dev->tempBuffer[i].line = 0; + if (dev->temp_buffer[i].buffer == buffer) { + dev->temp_buffer[i].in_use = 0; return; } } if (buffer) { /* assume it is an unmanaged one. */ - T(YAFFS_TRACE_BUFFERS, - (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR), - lineNo)); - YFREE(buffer); - dev->unmanagedTempDeallocations++; + yaffs_trace(YAFFS_TRACE_BUFFERS, + "Releasing unmanaged temp buffer"); + kfree(buffer); + dev->unmanaged_buffer_deallocs++; } } @@ -271,621 +188,339 @@ static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, /* * Determine if we have a managed buffer. */ -int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer) +int yaffs_is_managed_tmp_buffer(struct yaffs_dev *dev, const u8 *buffer) { int i; + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].buffer == buffer) + if (dev->temp_buffer[i].buffer == buffer) return 1; - } - for (i = 0; i < dev->nShortOpCaches; i++) { - if( dev->srCache[i].data == buffer ) - return 1; - - } + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].data == buffer) + return 1; + } - if (buffer == dev->checkpointBuffer) - return 1; + if (buffer == dev->checkpt_buffer) + return 1; - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR))); - return 0; + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: unmaged buffer detected."); + return 0; } - - /* - * Chunk bitmap manipulations + * Functions for robustisizing TODO + * */ -static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device * dev, int blk) +static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, + const struct yaffs_ext_tags *tags) { - if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR), - blk)); - YBUG(); - } - return dev->chunkBits + - (dev->chunkBitmapStride * (blk - dev->internalStartBlock)); + dev = dev; + nand_chunk = nand_chunk; + data = data; + tags = tags; } -static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk) +static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk, + const struct yaffs_ext_tags *tags) { - if(blk < dev->internalStartBlock || blk > dev->internalEndBlock || - chunk < 0 || chunk >= dev->nChunksPerBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk)); - YBUG(); - } -} - -static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - - memset(blkBits, 0, dev->chunkBitmapStride); + dev = dev; + nand_chunk = nand_chunk; + tags = tags; } -static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk) +void yaffs_handle_chunk_error(struct yaffs_dev *dev, + struct yaffs_block_info *bi) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); + if (!bi->gc_prioritise) { + bi->gc_prioritise = 1; + dev->has_pending_prioritised_gc = 1; + bi->chunk_error_strikes++; - yaffs_VerifyChunkBitId(dev,blk,chunk); + if (bi->chunk_error_strikes > 3) { + bi->needs_retiring = 1; /* Too many stikes, so retire */ + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Block struck out"); - blkBits[chunk / 8] &= ~(1 << (chunk & 7)); -} - -static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - - yaffs_VerifyChunkBitId(dev,blk,chunk); - - blkBits[chunk / 8] |= (1 << (chunk & 7)); + } + } } -static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk) +static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk, + int erased_ok) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); - yaffs_VerifyChunkBitId(dev,blk,chunk); + int flash_block = nand_chunk / dev->param.chunks_per_block; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; -} + yaffs_handle_chunk_error(dev, bi); -static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - int i; - for (i = 0; i < dev->chunkBitmapStride; i++) { - if (*blkBits) - return 1; - blkBits++; + if (erased_ok) { + /* Was an actual write failure, + * so mark the block for retirement.*/ + bi->needs_retiring = 1; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Block %d needs retiring", flash_block); } - return 0; -} - -static int yaffs_CountChunkBits(yaffs_Device * dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - int i; - int n = 0; - for (i = 0; i < dev->chunkBitmapStride; i++) { - __u8 x = *blkBits; - while(x){ - if(x & 1) - n++; - x >>=1; - } - blkBits++; - } - return n; + /* Delete the chunk */ + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + yaffs_skip_rest_of_block(dev); } /* * Verification code */ -static Y_INLINE int yaffs_SkipVerification(yaffs_Device *dev) -{ - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); -} - -static Y_INLINE int yaffs_SkipFullVerification(yaffs_Device *dev) -{ - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL)); -} +/* + * Simple hash function. Needs to have a reasonable spread + */ -static Y_INLINE int yaffs_SkipNANDVerification(yaffs_Device *dev) +static inline int yaffs_hash_fn(int n) { - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND)); + if (n < 0) + n = -n; + return n % YAFFS_NOBJECT_BUCKETS; } -static const char * blockStateName[] = { -"Unknown", -"Needs scanning", -"Scanning", -"Empty", -"Allocating", -"Full", -"Dirty", -"Checkpoint", -"Collecting", -"Dead" -}; +/* + * Access functions to useful fake objects. + * Note that root might have a presence in NAND if permissions are set. + */ -static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) +struct yaffs_obj *yaffs_root(struct yaffs_dev *dev) { - int actuallyUsed; - int inUse; - - if(yaffs_SkipVerification(dev)) - return; - - /* Report illegal runtime states */ - if(bi->blockState <0 || bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState)); - - switch(bi->blockState){ - case YAFFS_BLOCK_STATE_UNKNOWN: - case YAFFS_BLOCK_STATE_SCANNING: - case YAFFS_BLOCK_STATE_NEEDS_SCANNING: - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR), - n,blockStateName[bi->blockState])); - } - - /* Check pages in use and soft deletions are legal */ - - actuallyUsed = bi->pagesInUse - bi->softDeletions; - - if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock || - bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock || - actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR), - n,bi->pagesInUse,bi->softDeletions)); - - - /* Check chunk bitmap legal */ - inUse = yaffs_CountChunkBits(dev,n); - if(inUse != bi->pagesInUse) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR), - n,bi->pagesInUse,inUse)); - - /* Check that the sequence number is valid. - * Ten million is legal, but is very unlikely - */ - if(dev->isYaffs2 && - (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) && - (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 )) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR), - n,bi->sequenceNumber)); - + return dev->root_dir; } -static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) +struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev) { - yaffs_VerifyBlock(dev,bi,n); + return dev->lost_n_found; +} - /* After collection the block should be in the erased state */ - /* TODO: This will need to change if we do partial gc */ +/* + * Erased NAND checking functions + */ - if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){ - T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR), - n,bi->blockState)); +int yaffs_check_ff(u8 *buffer, int n_bytes) +{ + /* Horrible, slow implementation */ + while (n_bytes--) { + if (*buffer != 0xff) + return 0; + buffer++; } + return 1; } -static void yaffs_VerifyBlocks(yaffs_Device *dev) +static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk) { - int i; - int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES]; - int nIllegalBlockStates = 0; - - - if(yaffs_SkipVerification(dev)) - return; - - memset(nBlocksPerState,0,sizeof(nBlocksPerState)); - + int retval = YAFFS_OK; + u8 *data = yaffs_get_temp_buffer(dev); + struct yaffs_ext_tags tags; + int result; - for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); - yaffs_VerifyBlock(dev,bi,i); + result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags); - if(bi->blockState >=0 && bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES) - nBlocksPerState[bi->blockState]++; - else - nIllegalBlockStates++; + if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR) + retval = YAFFS_FAIL; + if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || + tags.chunk_used) { + yaffs_trace(YAFFS_TRACE_NANDACCESS, + "Chunk %d not erased", nand_chunk); + retval = YAFFS_FAIL; } - T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); - T(YAFFS_TRACE_VERIFY,(TSTR("Block summary"TENDSTR))); - - T(YAFFS_TRACE_VERIFY,(TSTR("%d blocks have illegal states"TENDSTR),nIllegalBlockStates)); - if(nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1) - T(YAFFS_TRACE_VERIFY,(TSTR("Too many allocating blocks"TENDSTR))); - - for(i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) - T(YAFFS_TRACE_VERIFY, - (TSTR("%s %d blocks"TENDSTR), - blockStateName[i],nBlocksPerState[i])); + yaffs_release_temp_buffer(dev, data); - if(dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]) - T(YAFFS_TRACE_VERIFY, - (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR), - dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])); - - if(dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]) - T(YAFFS_TRACE_VERIFY, - (TSTR("Erased block count wrong dev %d count %d"TENDSTR), - dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])); - - if(nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1) - T(YAFFS_TRACE_VERIFY, - (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR), - nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING])); - - T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); + return retval; } -/* - * Verify the object header. oh must be valid, but obj and tags may be NULL in which - * case those tests will not be performed. - */ -static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck) +static int yaffs_verify_chunk_written(struct yaffs_dev *dev, + int nand_chunk, + const u8 *data, + struct yaffs_ext_tags *tags) { - if(yaffs_SkipVerification(obj->myDev)) - return; - - if(!(tags && obj && oh)){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR), - (__u32)tags,(__u32)obj,(__u32)oh)); - return; - } - - if(oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || - oh->type > YAFFS_OBJECT_TYPE_MAX) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR), - tags->objectId, oh->type)); - - if(tags->objectId != obj->objectId) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch objectId %d"TENDSTR), - tags->objectId, obj->objectId)); + int retval = YAFFS_OK; + struct yaffs_ext_tags temp_tags; + u8 *buffer = yaffs_get_temp_buffer(dev); + int result; + + result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags); + if (memcmp(buffer, data, dev->data_bytes_per_chunk) || + temp_tags.obj_id != tags->obj_id || + temp_tags.chunk_id != tags->chunk_id || + temp_tags.n_bytes != tags->n_bytes) + retval = YAFFS_FAIL; + yaffs_release_temp_buffer(dev, buffer); - /* - * Check that the object's parent ids match if parentCheck requested. - * - * Tests do not apply to the root object. - */ - - if(parentCheck && tags->objectId > 1 && !obj->parent) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR), - tags->objectId, oh->parentObjectId)); + return retval; +} - if(parentCheck && obj->parent && - oh->parentObjectId != obj->parent->objectId && - (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED || - obj->parent->objectId != YAFFS_OBJECTID_DELETED)) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR), - tags->objectId, oh->parentObjectId, obj->parent->objectId)); +int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks) +{ + int reserved_chunks; + int reserved_blocks = dev->param.n_reserved_blocks; + int checkpt_blocks; + checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev); - if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header name is NULL"TENDSTR), - obj->objectId)); + reserved_chunks = + (reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block; - if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header name is 0xFF"TENDSTR), - obj->objectId)); + return (dev->n_free_chunks > (reserved_chunks + n_chunks)); } -static void yaffs_VerifyFile(yaffs_Object *obj) +static int yaffs_find_alloc_block(struct yaffs_dev *dev) { - int requiredTallness; - int actualTallness; - __u32 lastChunk; - __u32 x; - __u32 i; - yaffs_Device *dev; - yaffs_ExtendedTags tags; - yaffs_Tnode *tn; - __u32 objectId; - - if(obj && yaffs_SkipVerification(obj->myDev)) - return; + int i; + struct yaffs_block_info *bi; - dev = obj->myDev; - objectId = obj->objectId; + if (dev->n_erased_blocks < 1) { + /* Hoosterman we've got a problem. + * Can't get space to gc + */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: no more erased blocks"); - /* Check file size is consistent with tnode depth */ - lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1; - x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; - while (x> 0) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + return -1; } - actualTallness = obj->variant.fileVariant.topLevel; - - if(requiredTallness > actualTallness ) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR), - obj->objectId,actualTallness, requiredTallness)); - - - /* Check that the chunks in the tnode tree are all correct. - * We do this by scanning through the tnode tree and - * checking the tags for every chunk match. - */ - - if(yaffs_SkipNANDVerification(dev)) - return; + /* Find an empty block. */ - for(i = 1; i <= lastChunk; i++){ - tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant,i); - - if (tn) { - __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i); - if(theChunk > 0){ - /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */ - yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags); - if(tags.objectId != objectId || tags.chunkId != i){ - T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), - objectId, i, theChunk, - tags.objectId, tags.chunkId)); - } - } + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + dev->alloc_block_finder++; + if (dev->alloc_block_finder < dev->internal_start_block + || dev->alloc_block_finder > dev->internal_end_block) { + dev->alloc_block_finder = dev->internal_start_block; } + bi = yaffs_get_block_info(dev, dev->alloc_block_finder); + + if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { + bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING; + dev->seq_number++; + bi->seq_number = dev->seq_number; + dev->n_erased_blocks--; + yaffs_trace(YAFFS_TRACE_ALLOCATE, + "Allocated block %d, seq %d, %d left" , + dev->alloc_block_finder, dev->seq_number, + dev->n_erased_blocks); + return dev->alloc_block_finder; + } } -} - -static void yaffs_VerifyDirectory(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - -} - -static void yaffs_VerifyHardLink(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - - /* Verify sane equivalent object */ -} + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs tragedy: no more erased blocks, but there should have been %d", + dev->n_erased_blocks); -static void yaffs_VerifySymlink(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - - /* Verify symlink string */ -} - -static void yaffs_VerifySpecial(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; + return -1; } -static void yaffs_VerifyObject(yaffs_Object *obj) +static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver, + struct yaffs_block_info **block_ptr) { - yaffs_Device *dev; - - __u32 chunkMin; - __u32 chunkMax; - - __u32 chunkIdOk; - __u32 chunkIsLive; - - if(!obj) - return; - - dev = obj->myDev; - - if(yaffs_SkipVerification(dev)) - return; + int ret_val; + struct yaffs_block_info *bi; - /* Check sane object header chunk */ - - chunkMin = dev->internalStartBlock * dev->nChunksPerBlock; - chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1; + if (dev->alloc_block < 0) { + /* Get next block to allocate off */ + dev->alloc_block = yaffs_find_alloc_block(dev); + dev->alloc_page = 0; + } - chunkIdOk = (obj->chunkId >= chunkMin && obj->chunkId <= chunkMax); - chunkIsLive = chunkIdOk && - yaffs_CheckChunkBit(dev, - obj->chunkId / dev->nChunksPerBlock, - obj->chunkId % dev->nChunksPerBlock); - if(!obj->fake && - (!chunkIdOk || !chunkIsLive)) { - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has chunkId %d %s %s"TENDSTR), - obj->objectId,obj->chunkId, - chunkIdOk ? "" : ",out of range", - chunkIsLive || !chunkIdOk ? "" : ",marked as deleted")); + if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) { + /* No space unless we're allowed to use the reserve. */ + return -1; } - if(chunkIdOk && chunkIsLive &&!yaffs_SkipNANDVerification(dev)) { - yaffs_ExtendedTags tags; - yaffs_ObjectHeader *oh; - __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__); + if (dev->n_erased_blocks < dev->param.n_reserved_blocks + && dev->alloc_page == 0) + yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve"); - oh = (yaffs_ObjectHeader *)buffer; + /* Next page please.... */ + if (dev->alloc_block >= 0) { + bi = yaffs_get_block_info(dev, dev->alloc_block); - yaffs_ReadChunkWithTagsFromNAND(dev, obj->chunkId,buffer, &tags); + ret_val = (dev->alloc_block * dev->param.chunks_per_block) + + dev->alloc_page; + bi->pages_in_use++; + yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page); - yaffs_VerifyObjectHeader(obj,oh,&tags,1); + dev->alloc_page++; - yaffs_ReleaseTempBuffer(dev,buffer,__LINE__); - } + dev->n_free_chunks--; - /* Verify it has a parent */ - if(obj && !obj->fake && - (!obj->parent || obj->parent->myDev != dev)){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR), - obj->objectId,obj->parent)); - } + /* If the block is full set the state to full */ + if (dev->alloc_page >= dev->param.chunks_per_block) { + bi->block_state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } - /* Verify parent is a directory */ - if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR), - obj->objectId,obj->parent->variantType)); - } + if (block_ptr) + *block_ptr = bi; - switch(obj->variantType){ - case YAFFS_OBJECT_TYPE_FILE: - yaffs_VerifyFile(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_VerifySymlink(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_VerifyDirectory(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_VerifyHardLink(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_VerifySpecial(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has illegaltype %d"TENDSTR), - obj->objectId,obj->variantType)); - break; + return ret_val; } + yaffs_trace(YAFFS_TRACE_ERROR, + "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!"); + return -1; } -static void yaffs_VerifyObjects(yaffs_Device *dev) +static int yaffs_get_erased_chunks(struct yaffs_dev *dev) { - yaffs_Object *obj; - int i; - struct list_head *lh; - - if(yaffs_SkipVerification(dev)) - return; - - /* Iterate through the objects in each hash entry */ - - for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){ - list_for_each(lh, &dev->objectBucket[i].list) { - if (lh) { - obj = list_entry(lh, yaffs_Object, hashLink); - yaffs_VerifyObject(obj); - } - } - } + int n; -} + n = dev->n_erased_blocks * dev->param.chunks_per_block; + if (dev->alloc_block > 0) + n += (dev->param.chunks_per_block - dev->alloc_page); -/* - * Simple hash function. Needs to have a reasonable spread - */ + return n; -static Y_INLINE int yaffs_HashFunction(int n) -{ -/* XXX U-BOOT XXX */ - /*n = abs(n); */ - if (n < 0) - n = -n; - return (n % YAFFS_NOBJECT_BUCKETS); } /* - * Access functions to useful fake objects + * yaffs_skip_rest_of_block() skips over the rest of the allocation block + * if we don't want to write to it. */ - -yaffs_Object *yaffs_Root(yaffs_Device * dev) +void yaffs_skip_rest_of_block(struct yaffs_dev *dev) { - return dev->rootDir; -} + struct yaffs_block_info *bi; -yaffs_Object *yaffs_LostNFound(yaffs_Device * dev) -{ - return dev->lostNFoundDir; -} - - -/* - * Erased NAND checking functions - */ - -int yaffs_CheckFF(__u8 * buffer, int nBytes) -{ - /* Horrible, slow implementation */ - while (nBytes--) { - if (*buffer != 0xFF) - return 0; - buffer++; - } - return 1; -} - -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND) -{ - - int retval = YAFFS_OK; - __u8 *data = yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ExtendedTags tags; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags); - - if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR) - retval = YAFFS_FAIL; - - - if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND)); - retval = YAFFS_FAIL; + if (dev->alloc_block > 0) { + bi = yaffs_get_block_info(dev, dev->alloc_block); + if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { + bi->block_state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } } - - yaffs_ReleaseTempBuffer(dev, data, __LINE__); - - return retval; - } -static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, - const __u8 * data, - yaffs_ExtendedTags * tags, - int useReserve) +static int yaffs_write_new_chunk(struct yaffs_dev *dev, + const u8 *data, + struct yaffs_ext_tags *tags, int use_reserver) { int attempts = 0; - int writeOk = 0; + int write_ok = 0; int chunk; - yaffs_InvalidateCheckpoint(dev); + yaffs2_checkpt_invalidate(dev); do { - yaffs_BlockInfo *bi = 0; - int erasedOk = 0; + struct yaffs_block_info *bi = 0; + int erased_ok = 0; - chunk = yaffs_AllocateChunk(dev, useReserve, &bi); + chunk = yaffs_alloc_chunk(dev, use_reserver, &bi); if (chunk < 0) { /* no space */ break; @@ -897,7 +532,7 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, * * Check the first page we try to write in a block. * If the check passes then we don't need to check any - * more. If the check fails, we check again... + * more. If the check fails, we check again... * If the block has been erased, we don't need to check. * * However, if the block has been prioritised for gc, @@ -909,55 +544,63 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, * chunk due to power loss. This checking policy should * catch that case with very few checks and thus save a * lot of checks that are most likely not needed. + * + * Mods to the above + * If an erase check fails or the write fails we skip the + * rest of the block. */ - if (bi->gcPrioritise) { - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - /* try another chunk */ - continue; - } /* let's give it a try */ attempts++; -#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED - bi->skipErasedCheck = 0; -#endif - if (!bi->skipErasedCheck) { - erasedOk = yaffs_CheckChunkErased(dev, chunk); - if (erasedOk != YAFFS_OK) { - T(YAFFS_TRACE_ERROR, - (TSTR ("**>> yaffs chunk %d was not erased" - TENDSTR), chunk)); - - /* try another chunk */ + if (dev->param.always_check_erased) + bi->skip_erased_check = 0; + + if (!bi->skip_erased_check) { + erased_ok = yaffs_check_chunk_erased(dev, chunk); + if (erased_ok != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs chunk %d was not erased", + chunk); + + /* If not erased, delete this one, + * skip rest of block and + * try another chunk */ + yaffs_chunk_del(dev, chunk, 1, __LINE__); + yaffs_skip_rest_of_block(dev); continue; } - bi->skipErasedCheck = 1; } - writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk, - data, tags); - if (writeOk != YAFFS_OK) { - yaffs_HandleWriteChunkError(dev, chunk, erasedOk); - /* try another chunk */ + write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags); + + if (!bi->skip_erased_check) + write_ok = + yaffs_verify_chunk_written(dev, chunk, data, tags); + + if (write_ok != YAFFS_OK) { + /* Clean up aborted write, skip to next block and + * try another chunk */ + yaffs_handle_chunk_wr_error(dev, chunk, erased_ok); continue; } + bi->skip_erased_check = 1; + /* Copy the data into the robustification buffer */ - yaffs_HandleWriteChunkOk(dev, chunk, data, tags); + yaffs_handle_chunk_wr_ok(dev, chunk, data, tags); - } while (writeOk != YAFFS_OK && - (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); + } while (write_ok != YAFFS_OK && + (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); - if(!writeOk) + if (!write_ok) chunk = -1; if (attempts > 1) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs write required %d attempts" TENDSTR), - attempts)); - - dev->nRetriedWrites += (attempts - 1); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs write required %d attempts", + attempts); + dev->n_retried_writes += (attempts - 1); } return chunk; @@ -967,109 +610,97 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, * Block retiring for handling a broken block. */ -static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND) +static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); + struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - yaffs_InvalidateCheckpoint(dev); + yaffs2_checkpt_invalidate(dev); - yaffs_MarkBlockBad(dev, blockInNAND); + yaffs2_clear_oldest_dirty_seq(dev, bi); - bi->blockState = YAFFS_BLOCK_STATE_DEAD; - bi->gcPrioritise = 0; - bi->needsRetiring = 0; + if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) { + if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Failed to mark bad and erase block %d", + flash_block); + } else { + struct yaffs_ext_tags tags; + int chunk_id = + flash_block * dev->param.chunks_per_block; + + u8 *buffer = yaffs_get_temp_buffer(dev); + + memset(buffer, 0xff, dev->data_bytes_per_chunk); + memset(&tags, 0, sizeof(tags)); + tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK; + if (dev->param.write_chunk_tags_fn(dev, chunk_id - + dev->chunk_offset, + buffer, + &tags) != YAFFS_OK) + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Failed to write bad block marker to block %d", + flash_block); + + yaffs_release_temp_buffer(dev, buffer); + } + } - dev->nRetiredBlocks++; -} + bi->block_state = YAFFS_BLOCK_STATE_DEAD; + bi->gc_prioritise = 0; + bi->needs_retiring = 0; -/* - * Functions for robustisizing TODO - * - */ - -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags) -{ + dev->n_retired_blocks++; } -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_ExtendedTags * tags) -{ -} +/*---------------- Name handling functions ------------*/ -void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi) +static u16 yaffs_calc_name_sum(const YCHAR *name) { - if(!bi->gcPrioritise){ - bi->gcPrioritise = 1; - dev->hasPendingPrioritisedGCs = 1; - bi->chunkErrorStrikes ++; + u16 sum = 0; + u16 i = 1; - if(bi->chunkErrorStrikes > 3){ - bi->needsRetiring = 1; /* Too many stikes, so retire this */ - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR))); + if (!name) + return 0; - } + while ((*name) && i < (YAFFS_MAX_NAME_LENGTH / 2)) { + /* 0x1f mask is case insensitive */ + sum += ((*name) & 0x1f) * i; + i++; + name++; } + return sum; } -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk) +void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name) { - - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); - - yaffs_HandleChunkError(dev,bi); - - - if(erasedOk ) { - /* Was an actual write failure, so mark the block for retirement */ - bi->needsRetiring = 1; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND)); - - - } - - /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); + memset(obj->short_name, 0, sizeof(obj->short_name)); + if (name && + yaffs_strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <= + YAFFS_SHORT_NAME_LENGTH) + yaffs_strcpy(obj->short_name, name); + else + obj->short_name[0] = _Y('\0'); + obj->sum = yaffs_calc_name_sum(name); } - -/*---------------- Name handling functions ------------*/ - -static __u16 yaffs_CalcNameSum(const YCHAR * name) +void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, + const struct yaffs_obj_hdr *oh) { - __u16 sum = 0; - __u16 i = 1; - - YUCHAR *bname = (YUCHAR *) name; - if (bname) { - while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) { - -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - sum += yaffs_toupper(*bname) * i; +#ifdef CONFIG_YAFFS_AUTO_UNICODE + YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1]; + memset(tmp_name, 0, sizeof(tmp_name)); + yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name, + YAFFS_MAX_NAME_LENGTH + 1); + yaffs_set_obj_name(obj, tmp_name); #else - sum += (*bname) * i; + yaffs_set_obj_name(obj, oh->name); #endif - i++; - bname++; - } - } - return sum; } -static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name) +loff_t yaffs_max_file_size(struct yaffs_dev *dev) { -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) { - yaffs_strcpy(obj->shortName, name); - } else { - obj->shortName[0] = _Y('\0'); - } -#endif - obj->sum = yaffs_CalcNameSum(name); + return ((loff_t) YAFFS_MAX_CHUNK_ID) * dev->data_bytes_per_chunk; } /*-------------------- TNODES ------------------- @@ -1079,381 +710,235 @@ static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name) * in the tnode. */ -/* yaffs_CreateTnodes creates a bunch more tnodes and - * adds them to the tnode free list. - * Don't use this function directly - */ - -static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes) +struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev) { - int i; - int tnodeSize; - yaffs_Tnode *newTnodes; - __u8 *mem; - yaffs_Tnode *curr; - yaffs_Tnode *next; - yaffs_TnodeList *tnl; - - if (nTnodes < 1) - return YAFFS_OK; - - /* Calculate the tnode size in bytes for variable width tnode support. - * Must be a multiple of 32-bits */ - tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - - /* make these things */ - - newTnodes = YMALLOC(nTnodes * tnodeSize); - mem = (__u8 *)newTnodes; - - if (!newTnodes) { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); - return YAFFS_FAIL; - } - - /* Hook them into the free list */ -#if 0 - for (i = 0; i < nTnodes - 1; i++) { - newTnodes[i].internal[0] = &newTnodes[i + 1]; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - } - - newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - dev->freeTnodes = newTnodes; -#else - /* New hookup for wide tnodes */ - for(i = 0; i < nTnodes -1; i++) { - curr = (yaffs_Tnode *) &mem[i * tnodeSize]; - next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize]; - curr->internal[0] = next; - } - - curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize]; - curr->internal[0] = dev->freeTnodes; - dev->freeTnodes = (yaffs_Tnode *)mem; - -#endif - - - dev->nFreeTnodes += nTnodes; - dev->nTnodesCreated += nTnodes; - - /* Now add this bunch of tnodes to a list for freeing up. - * NB If we can't add this to the management list it isn't fatal - * but it just means we can't free this bunch of tnodes later. - */ - - tnl = YMALLOC(sizeof(yaffs_TnodeList)); - if (!tnl) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs: Could not add tnodes to management list" TENDSTR))); - return YAFFS_FAIL; - - } else { - tnl->tnodes = newTnodes; - tnl->next = dev->allocatedTnodeList; - dev->allocatedTnodeList = tnl; - } - - T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); - - return YAFFS_OK; -} - -/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */ - -static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev) -{ - yaffs_Tnode *tn = NULL; - - /* If there are none left make more */ - if (!dev->freeTnodes) { - yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES); - } + struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev); - if (dev->freeTnodes) { - tn = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) { - /* Hoosterman, this thing looks like it isn't in the list */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Tnode list bug 1" TENDSTR))); - } -#endif - dev->freeTnodes = dev->freeTnodes->internal[0]; - dev->nFreeTnodes--; + if (tn) { + memset(tn, 0, dev->tnode_size); + dev->n_tnodes++; } - return tn; -} - -static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev) -{ - yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev); - - if(tn) - memset(tn, 0, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); + dev->checkpoint_blocks_required = 0; /* force recalculation */ return tn; } /* FreeTnode frees up a tnode and puts it back on the free list */ -static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn) +static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) { - if (tn) { -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) { - /* Hoosterman, this thing looks like it is already in the list */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Tnode list bug 2" TENDSTR))); - } - tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - tn->internal[0] = dev->freeTnodes; - dev->freeTnodes = tn; - dev->nFreeTnodes++; - } + yaffs_free_raw_tnode(dev, tn); + dev->n_tnodes--; + dev->checkpoint_blocks_required = 0; /* force recalculation */ } -static void yaffs_DeinitialiseTnodes(yaffs_Device * dev) +static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev) { - /* Free the list of allocated tnodes */ - yaffs_TnodeList *tmp; - - while (dev->allocatedTnodeList) { - tmp = dev->allocatedTnodeList->next; - - YFREE(dev->allocatedTnodeList->tnodes); - YFREE(dev->allocatedTnodeList); - dev->allocatedTnodeList = tmp; - - } - - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; + yaffs_deinit_raw_tnodes_and_objs(dev); + dev->n_obj = 0; + dev->n_tnodes = 0; } -static void yaffs_InitialiseTnodes(yaffs_Device * dev) +void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos, unsigned val) { - dev->allocatedTnodeList = NULL; - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; - dev->nTnodesCreated = 0; + u32 *map = (u32 *) tn; + u32 bit_in_map; + u32 bit_in_word; + u32 word_in_map; + u32 mask; -} + pos &= YAFFS_TNODES_LEVEL0_MASK; + val >>= dev->chunk_grp_bits; + bit_in_map = pos * dev->tnode_width; + word_in_map = bit_in_map / 32; + bit_in_word = bit_in_map & (32 - 1); -void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, unsigned val) -{ - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 mask; - - pos &= YAFFS_TNODES_LEVEL0_MASK; - val >>= dev->chunkGroupBits; - - bitInMap = pos * dev->tnodeWidth; - wordInMap = bitInMap /32; - bitInWord = bitInMap & (32 -1); + mask = dev->tnode_mask << bit_in_word; - mask = dev->tnodeMask << bitInWord; + map[word_in_map] &= ~mask; + map[word_in_map] |= (mask & (val << bit_in_word)); - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val << bitInWord)); - - if(dev->tnodeWidth > (32-bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord); - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val >> bitInWord)); - } + if (dev->tnode_width > (32 - bit_in_word)) { + bit_in_word = (32 - bit_in_word); + word_in_map++; + mask = + dev->tnode_mask >> bit_in_word; + map[word_in_map] &= ~mask; + map[word_in_map] |= (mask & (val >> bit_in_word)); + } } -static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos) +u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos) { - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 val; + u32 *map = (u32 *) tn; + u32 bit_in_map; + u32 bit_in_word; + u32 word_in_map; + u32 val; - pos &= YAFFS_TNODES_LEVEL0_MASK; + pos &= YAFFS_TNODES_LEVEL0_MASK; - bitInMap = pos * dev->tnodeWidth; - wordInMap = bitInMap /32; - bitInWord = bitInMap & (32 -1); + bit_in_map = pos * dev->tnode_width; + word_in_map = bit_in_map / 32; + bit_in_word = bit_in_map & (32 - 1); - val = map[wordInMap] >> bitInWord; + val = map[word_in_map] >> bit_in_word; - if(dev->tnodeWidth > (32-bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - val |= (map[wordInMap] << bitInWord); - } + if (dev->tnode_width > (32 - bit_in_word)) { + bit_in_word = (32 - bit_in_word); + word_in_map++; + val |= (map[word_in_map] << bit_in_word); + } - val &= dev->tnodeMask; - val <<= dev->chunkGroupBits; + val &= dev->tnode_mask; + val <<= dev->chunk_grp_bits; - return val; + return val; } /* ------------------- End of individual tnode manipulation -----------------*/ /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ - * The look up tree is represented by the top tnode and the number of topLevel + * The look up tree is represented by the top tnode and the number of top_level * in the tree. 0 means only the level 0 tnode is in the tree. */ /* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId) +struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id) { + struct yaffs_tnode *tn = file_struct->top; + u32 i; + int required_depth; + int level = file_struct->top_level; - yaffs_Tnode *tn = fStruct->top; - __u32 i; - int requiredTallness; - int level = fStruct->topLevel; + dev = dev; /* Check sane level and chunk Id */ - if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) { + if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) return NULL; - } - if (chunkId > YAFFS_MAX_CHUNK_ID) { + if (chunk_id > YAFFS_MAX_CHUNK_ID) return NULL; - } - /* First check we're tall enough (ie enough topLevel) */ + /* First check we're tall enough (ie enough top_level) */ - i = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; + i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; + required_depth = 0; while (i) { i >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + required_depth++; } - if (requiredTallness > fStruct->topLevel) { - /* Not tall enough, so we can't find it, return NULL. */ - return NULL; - } + if (required_depth > file_struct->top_level) + return NULL; /* Not tall enough, so we can't find it */ /* Traverse down to level 0 */ while (level > 0 && tn) { - tn = tn-> - internal[(chunkId >> - ( YAFFS_TNODES_LEVEL0_BITS + - (level - 1) * - YAFFS_TNODES_INTERNAL_BITS) - ) & - YAFFS_TNODES_INTERNAL_MASK]; + tn = tn->internal[(chunk_id >> + (YAFFS_TNODES_LEVEL0_BITS + + (level - 1) * + YAFFS_TNODES_INTERNAL_BITS)) & + YAFFS_TNODES_INTERNAL_MASK]; level--; - } return tn; } -/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. +/* add_find_tnode_0 finds the level 0 tnode if it exists, + * otherwise first expands the tree. * This happens in two steps: * 1. If the tree isn't tall enough, then make it taller. * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. * * Used when modifying the tree. * - * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will - * be plugged into the ttree. + * If the tn argument is NULL, then a fresh tnode will be added otherwise the + * specified tn will be plugged into the ttree. */ -static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId, - yaffs_Tnode *passedTn) +struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id, + struct yaffs_tnode *passed_tn) { - - int requiredTallness; + int required_depth; int i; int l; - yaffs_Tnode *tn; - - __u32 x; - + struct yaffs_tnode *tn; + u32 x; /* Check sane level and page Id */ - if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) { + if (file_struct->top_level < 0 || + file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) return NULL; - } - if (chunkId > YAFFS_MAX_CHUNK_ID) { + if (chunk_id > YAFFS_MAX_CHUNK_ID) return NULL; - } - /* First check we're tall enough (ie enough topLevel) */ + /* First check we're tall enough (ie enough top_level) */ - x = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; + x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; + required_depth = 0; while (x) { x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + required_depth++; } + if (required_depth > file_struct->top_level) { + /* Not tall enough, gotta make the tree taller */ + for (i = file_struct->top_level; i < required_depth; i++) { - if (requiredTallness > fStruct->topLevel) { - /* Not tall enough,gotta make the tree taller */ - for (i = fStruct->topLevel; i < requiredTallness; i++) { - - tn = yaffs_GetTnode(dev); + tn = yaffs_get_tnode(dev); if (tn) { - tn->internal[0] = fStruct->top; - fStruct->top = tn; + tn->internal[0] = file_struct->top; + file_struct->top = tn; + file_struct->top_level++; } else { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: no more tnodes" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs: no more tnodes"); + return NULL; } } - - fStruct->topLevel = requiredTallness; } /* Traverse down to level 0, adding anything we need */ - l = fStruct->topLevel; - tn = fStruct->top; + l = file_struct->top_level; + tn = file_struct->top; - if(l > 0) { + if (l > 0) { while (l > 0 && tn) { - x = (chunkId >> - ( YAFFS_TNODES_LEVEL0_BITS + + x = (chunk_id >> + (YAFFS_TNODES_LEVEL0_BITS + (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & YAFFS_TNODES_INTERNAL_MASK; - - if((l>1) && !tn->internal[x]){ + if ((l > 1) && !tn->internal[x]) { /* Add missing non-level-zero tnode */ - tn->internal[x] = yaffs_GetTnode(dev); - - } else if(l == 1) { + tn->internal[x] = yaffs_get_tnode(dev); + if (!tn->internal[x]) + return NULL; + } else if (l == 1) { /* Looking from level 1 at level 0 */ - if (passedTn) { - /* If we already have one, then release it.*/ - if(tn->internal[x]) - yaffs_FreeTnode(dev,tn->internal[x]); - tn->internal[x] = passedTn; - - } else if(!tn->internal[x]) { + if (passed_tn) { + /* If we already have one, release it */ + if (tn->internal[x]) + yaffs_free_tnode(dev, + tn->internal[x]); + tn->internal[x] = passed_tn; + + } else if (!tn->internal[x]) { /* Don't have one, none passed in */ - tn->internal[x] = yaffs_GetTnode(dev); + tn->internal[x] = yaffs_get_tnode(dev); + if (!tn->internal[x]) + return NULL; } } @@ -1462,2979 +947,2479 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev, } } else { /* top is level 0 */ - if(passedTn) { - memcpy(tn,passedTn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); - yaffs_FreeTnode(dev,passedTn); + if (passed_tn) { + memcpy(tn, passed_tn, + (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8); + yaffs_free_tnode(dev, passed_tn); } } return tn; } -static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk, - yaffs_ExtendedTags * tags, int objectId, - int chunkInInode) +static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id, + int chunk_obj) { - int j; + return (tags->chunk_id == chunk_obj && + tags->obj_id == obj_id && + !tags->is_deleted) ? 1 : 0; - for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { - if (yaffs_CheckChunkBit - (dev, theChunk / dev->nChunksPerBlock, - theChunk % dev->nChunksPerBlock)) { - yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, - tags); - if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { - /* found it; */ - return theChunk; +} +static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk, + struct yaffs_ext_tags *tags, int obj_id, + int inode_chunk) +{ + int j; + + for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) { + if (yaffs_check_chunk_bit + (dev, the_chunk / dev->param.chunks_per_block, + the_chunk % dev->param.chunks_per_block)) { + + if (dev->chunk_grp_size == 1) + return the_chunk; + else { + yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, + tags); + if (yaffs_tags_match(tags, + obj_id, inode_chunk)) { + /* found it; */ + return the_chunk; + } } } - theChunk++; + the_chunk++; } return -1; } -static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk) +static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk, + struct yaffs_ext_tags *tags) { + /*Get the Tnode, then get the level 0 offset chunk offset */ + struct yaffs_tnode *tn; + int the_chunk = -1; + struct yaffs_ext_tags local_tags; + int ret_val = -1; + struct yaffs_dev *dev = in->my_dev; - yaffs_BlockInfo *theBlock; - - T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); - - theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock); - if (theBlock) { - theBlock->softDeletions++; - dev->nFreeChunks++; + if (!tags) { + /* Passed a NULL, so use our own tags space */ + tags = &local_tags; } -} - -/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file. - * All soft deleting does is increment the block's softdelete count and pulls the chunk out - * of the tnode. - * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. - */ - -static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, - __u32 level, int chunkOffset) -{ - int i; - int theChunk; - int allDone = 1; - yaffs_Device *dev = in->myDev; - - if (tn) { - if (level > 0) { - - for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; - i--) { - if (tn->internal[i]) { - allDone = - yaffs_SoftDeleteWorker(in, - tn-> - internal[i], - level - 1, - (chunkOffset - << - YAFFS_TNODES_INTERNAL_BITS) - + i); - if (allDone) { - yaffs_FreeTnode(dev, - tn-> - internal[i]); - tn->internal[i] = NULL; - } else { - /* Hoosterman... how could this happen? */ - } - } - } - return (allDone) ? 1 : 0; - } else if (level == 0) { - - for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { - theChunk = yaffs_GetChunkGroupBase(dev,tn,i); - if (theChunk) { - /* Note this does not find the real chunk, only the chunk group. - * We make an assumption that a chunk group is not larger than - * a block. - */ - yaffs_SoftDeleteChunk(dev, theChunk); - yaffs_PutLevel0Tnode(dev,tn,i,0); - } - - } - return 1; - - } - } + tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); - return 1; + if (!tn) + return ret_val; -} + the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); -static void yaffs_SoftDeleteFile(yaffs_Object * obj) -{ - if (obj->deleted && - obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) { - if (obj->nDataChunks <= 0) { - /* Empty file with no duplicate object headers, just delete it immediately */ - yaffs_FreeTnode(obj->myDev, - obj->variant.fileVariant.top); - obj->variant.fileVariant.top = NULL; - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: Deleting empty file %d" TENDSTR), - obj->objectId)); - yaffs_DoGenericObjectDeletion(obj); - } else { - yaffs_SoftDeleteWorker(obj, - obj->variant.fileVariant.top, - obj->variant.fileVariant. - topLevel, 0); - obj->softDeleted = 1; - } - } + ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, + inode_chunk); + return ret_val; } -/* Pruning removes any part of the file structure tree that is beyond the - * bounds of the file (ie that does not point to chunks). - * - * A file should only get pruned when its size is reduced. - * - * Before pruning, the chunks must be pulled from the tree and the - * level 0 tnode entries must be zeroed out. - * Could also use this for file deletion, but that's probably better handled - * by a special case. - */ - -static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn, - __u32 level, int del0) +static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk, + struct yaffs_ext_tags *tags) { - int i; - int hasData; - - if (tn) { - hasData = 0; + /* Get the Tnode, then get the level 0 offset chunk offset */ + struct yaffs_tnode *tn; + int the_chunk = -1; + struct yaffs_ext_tags local_tags; + struct yaffs_dev *dev = in->my_dev; + int ret_val = -1; - for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i] && level > 0) { - tn->internal[i] = - yaffs_PruneWorker(dev, tn->internal[i], - level - 1, - (i == 0) ? del0 : 1); - } + if (!tags) { + /* Passed a NULL, so use our own tags space */ + tags = &local_tags; + } - if (tn->internal[i]) { - hasData++; - } - } + tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); - if (hasData == 0 && del0) { - /* Free and return NULL */ + if (!tn) + return ret_val; - yaffs_FreeTnode(dev, tn); - tn = NULL; - } + the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); - } + ret_val = yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, + inode_chunk); - return tn; + /* Delete the entry in the filestructure (if found) */ + if (ret_val != -1) + yaffs_load_tnode_0(dev, tn, inode_chunk, 0); + return ret_val; } -static int yaffs_PruneFileStructure(yaffs_Device * dev, - yaffs_FileStructure * fStruct) +int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, + int nand_chunk, int in_scan) { - int i; - int hasData; - int done = 0; - yaffs_Tnode *tn; + /* NB in_scan is zero unless scanning. + * For forward scanning, in_scan is > 0; + * for backward scanning in_scan is < 0 + * + * nand_chunk = 0 is a dummy insert to make sure the tnodes are there. + */ - if (fStruct->topLevel > 0) { - fStruct->top = - yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0); + struct yaffs_tnode *tn; + struct yaffs_dev *dev = in->my_dev; + int existing_cunk; + struct yaffs_ext_tags existing_tags; + struct yaffs_ext_tags new_tags; + unsigned existing_serial, new_serial; - /* Now we have a tree with all the non-zero branches NULL but the height - * is the same as it was. - * Let's see if we can trim internal tnodes to shorten the tree. - * We can do this if only the 0th element in the tnode is in use - * (ie all the non-zero are NULL) + if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) { + /* Just ignore an attempt at putting a chunk into a non-file + * during scanning. + * If it is not during Scanning then something went wrong! */ - - while (fStruct->topLevel && !done) { - tn = fStruct->top; - - hasData = 0; - for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) { - hasData++; - } - } - - if (!hasData) { - fStruct->top = tn->internal[0]; - fStruct->topLevel--; - yaffs_FreeTnode(dev, tn); - } else { - done = 1; - } + if (!in_scan) { + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy:attempt to put data chunk into a non-file" + ); + BUG(); } - } - - return YAFFS_OK; -} - -/*-------------------- End of File Structure functions.-------------------*/ -/* yaffs_CreateFreeObjects creates a bunch more objects and - * adds them to the object free list. - */ -static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects) -{ - int i; - yaffs_Object *newObjects; - yaffs_ObjectList *list; - - if (nObjects < 1) + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); return YAFFS_OK; - - /* make these things */ - newObjects = YMALLOC(nObjects * sizeof(yaffs_Object)); - list = YMALLOC(sizeof(yaffs_ObjectList)); - - if (!newObjects || !list) { - if(newObjects) - YFREE(newObjects); - if(list) - YFREE(list); - T(YAFFS_TRACE_ALLOCATE, - (TSTR("yaffs: Could not allocate more objects" TENDSTR))); - return YAFFS_FAIL; - } - - /* Hook them into the free list */ - for (i = 0; i < nObjects - 1; i++) { - newObjects[i].siblings.next = - (struct list_head *)(&newObjects[i + 1]); } - newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects; - dev->freeObjects = newObjects; - dev->nFreeObjects += nObjects; - dev->nObjectsCreated += nObjects; - - /* Now add this bunch of Objects to a list for freeing up. */ - - list->objects = newObjects; - list->next = dev->allocatedObjectList; - dev->allocatedObjectList = list; - - return YAFFS_OK; -} - - -/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ -static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device * dev) -{ - yaffs_Object *tn = NULL; - - /* If there are none left make more */ - if (!dev->freeObjects) { - yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS); - } - - if (dev->freeObjects) { - tn = dev->freeObjects; - dev->freeObjects = - (yaffs_Object *) (dev->freeObjects->siblings.next); - dev->nFreeObjects--; + tn = yaffs_add_find_tnode_0(dev, + &in->variant.file_variant, + inode_chunk, NULL); + if (!tn) + return YAFFS_FAIL; - /* Now sweeten it up... */ + if (!nand_chunk) + /* Dummy insert, bail now */ + return YAFFS_OK; - memset(tn, 0, sizeof(yaffs_Object)); - tn->myDev = dev; - tn->chunkId = -1; - tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN; - INIT_LIST_HEAD(&(tn->hardLinks)); - INIT_LIST_HEAD(&(tn->hashLink)); - INIT_LIST_HEAD(&tn->siblings); + existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk); - /* Add it to the lost and found directory. - * NB Can't put root or lostNFound in lostNFound so - * check if lostNFound exists first + if (in_scan != 0) { + /* If we're scanning then we need to test for duplicates + * NB This does not need to be efficient since it should only + * happen when the power fails during a write, then only one + * chunk should ever be affected. + * + * Correction for YAFFS2: This could happen quite a lot and we + * need to think about efficiency! TODO + * Update: For backward scanning we don't need to re-read tags + * so this is quite cheap. */ - if (dev->lostNFoundDir) { - yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn); - } - } - return tn; -} - -static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device * dev, int number, - __u32 mode) -{ + if (existing_cunk > 0) { + /* NB Right now existing chunk will not be real + * chunk_id if the chunk group size > 1 + * thus we have to do a FindChunkInFile to get the + * real chunk id. + * + * We have a duplicate now we need to decide which + * one to use: + * + * Backwards scanning YAFFS2: The old one is what + * we use, dump the new one. + * YAFFS1: Get both sets of tags and compare serial + * numbers. + */ - yaffs_Object *obj = - yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - if (obj) { - obj->fake = 1; /* it is fake so it has no NAND presence... */ - obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */ - obj->unlinkAllowed = 0; /* ... or unlink it */ - obj->deleted = 0; - obj->unlinked = 0; - obj->yst_mode = mode; - obj->myDev = dev; - obj->chunkId = 0; /* Not a valid chunk. */ - } + if (in_scan > 0) { + /* Only do this for forward scanning */ + yaffs_rd_chunk_tags_nand(dev, + nand_chunk, + NULL, &new_tags); - return obj; + /* Do a proper find */ + existing_cunk = + yaffs_find_chunk_in_file(in, inode_chunk, + &existing_tags); + } -} + if (existing_cunk <= 0) { + /*Hoosterman - how did this happen? */ -static void yaffs_UnhashObject(yaffs_Object * tn) -{ - int bucket; - yaffs_Device *dev = tn->myDev; + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: existing chunk < 0 in scan" + ); - /* If it is still linked into the bucket list, free from the list */ - if (!list_empty(&tn->hashLink)) { - list_del_init(&tn->hashLink); - bucket = yaffs_HashFunction(tn->objectId); - dev->objectBucket[bucket].count--; - } + } -} + /* NB The deleted flags should be false, otherwise + * the chunks will not be loaded during a scan + */ -/* FreeObject frees up a Object and puts it back on the free list */ -static void yaffs_FreeObject(yaffs_Object * tn) -{ + if (in_scan > 0) { + new_serial = new_tags.serial_number; + existing_serial = existing_tags.serial_number; + } - yaffs_Device *dev = tn->myDev; + if ((in_scan > 0) && + (existing_cunk <= 0 || + ((existing_serial + 1) & 3) == new_serial)) { + /* Forward scanning. + * Use new + * Delete the old one and drop through to + * update the tnode + */ + yaffs_chunk_del(dev, existing_cunk, 1, + __LINE__); + } else { + /* Backward scanning or we want to use the + * existing one + * Delete the new one and return early so that + * the tnode isn't changed + */ + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + return YAFFS_OK; + } + } -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - if (tn->myInode) { - /* We're still hooked up to a cached inode. - * Don't delete now, but mark for later deletion - */ - tn->deferedFree = 1; - return; } -#endif -#endif - yaffs_UnhashObject(tn); - /* Link into the free list. */ - tn->siblings.next = (struct list_head *)(dev->freeObjects); - dev->freeObjects = tn; - dev->nFreeObjects++; -} + if (existing_cunk == 0) + in->n_data_chunks++; -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ + yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); -void yaffs_HandleDeferedFree(yaffs_Object * obj) -{ - if (obj->deferedFree) { - yaffs_FreeObject(obj); - } + return YAFFS_OK; } -#endif -#endif - -static void yaffs_DeinitialiseObjects(yaffs_Device * dev) +static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk) { - /* Free the list of allocated Objects */ + struct yaffs_block_info *the_block; + unsigned block_no; - yaffs_ObjectList *tmp; + yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk); - while (dev->allocatedObjectList) { - tmp = dev->allocatedObjectList->next; - YFREE(dev->allocatedObjectList->objects); - YFREE(dev->allocatedObjectList); - - dev->allocatedObjectList = tmp; + block_no = chunk / dev->param.chunks_per_block; + the_block = yaffs_get_block_info(dev, block_no); + if (the_block) { + the_block->soft_del_pages++; + dev->n_free_chunks++; + yaffs2_update_oldest_dirty_seq(dev, block_no, the_block); } - - dev->freeObjects = NULL; - dev->nFreeObjects = 0; } -static void yaffs_InitialiseObjects(yaffs_Device * dev) -{ - int i; - - dev->allocatedObjectList = NULL; - dev->freeObjects = NULL; - dev->nFreeObjects = 0; - - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - INIT_LIST_HEAD(&dev->objectBucket[i].list); - dev->objectBucket[i].count = 0; - } - -} +/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all + * the chunks in the file. + * All soft deleting does is increment the block's softdelete count and pulls + * the chunk out of the tnode. + * Thus, essentially this is the same as DeleteWorker except that the chunks + * are soft deleted. + */ -static int yaffs_FindNiceObjectBucket(yaffs_Device * dev) +static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn, + u32 level, int chunk_offset) { - static int x = 0; int i; - int l = 999; - int lowest = 999999; + int the_chunk; + int all_done = 1; + struct yaffs_dev *dev = in->my_dev; - /* First let's see if we can find one that's empty. */ + if (!tn) + return 1; - for (i = 0; i < 10 && lowest > 0; i++) { - x++; - x %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[x].count < lowest) { - lowest = dev->objectBucket[x].count; - l = x; + if (level > 0) { + for (i = YAFFS_NTNODES_INTERNAL - 1; + all_done && i >= 0; + i--) { + if (tn->internal[i]) { + all_done = + yaffs_soft_del_worker(in, + tn->internal[i], + level - 1, + (chunk_offset << + YAFFS_TNODES_INTERNAL_BITS) + + i); + if (all_done) { + yaffs_free_tnode(dev, + tn->internal[i]); + tn->internal[i] = NULL; + } else { + /* Can this happen? */ + } + } } - + return (all_done) ? 1 : 0; } - /* If we didn't find an empty list, then try - * looking a bit further for a short one - */ - - for (i = 0; i < 10 && lowest > 3; i++) { - x++; - x %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[x].count < lowest) { - lowest = dev->objectBucket[x].count; - l = x; + /* level 0 */ + for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { + the_chunk = yaffs_get_group_base(dev, tn, i); + if (the_chunk) { + yaffs_soft_del_chunk(dev, the_chunk); + yaffs_load_tnode_0(dev, tn, i, 0); } - } - - return l; + return 1; } -static int yaffs_CreateNewObjectNumber(yaffs_Device * dev) +static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj) { - int bucket = yaffs_FindNiceObjectBucket(dev); + struct yaffs_dev *dev = obj->my_dev; + struct yaffs_obj *parent; - /* Now find an object value that has not already been taken - * by scanning the list. - */ + yaffs_verify_obj_in_dir(obj); + parent = obj->parent; - int found = 0; - struct list_head *i; + yaffs_verify_dir(parent); - __u32 n = (__u32) bucket; + if (dev && dev->param.remove_obj_fn) + dev->param.remove_obj_fn(obj); - /* yaffs_CheckObjectHashSanity(); */ - - while (!found) { - found = 1; - n += YAFFS_NOBJECT_BUCKETS; - if (1 || dev->objectBucket[bucket].count > 0) { - list_for_each(i, &dev->objectBucket[bucket].list) { - /* If there is already one in the list */ - if (i - && list_entry(i, yaffs_Object, - hashLink)->objectId == n) { - found = 0; - } - } - } - } - - - return n; -} - -static void yaffs_HashObject(yaffs_Object * in) -{ - int bucket = yaffs_HashFunction(in->objectId); - yaffs_Device *dev = in->myDev; - - list_add(&in->hashLink, &dev->objectBucket[bucket].list); - dev->objectBucket[bucket].count++; + list_del_init(&obj->siblings); + obj->parent = NULL; + yaffs_verify_dir(parent); } -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number) +void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj) { - int bucket = yaffs_HashFunction(number); - struct list_head *i; - yaffs_Object *in; - - list_for_each(i, &dev->objectBucket[bucket].list) { - /* Look if it is in the list */ - if (i) { - in = list_entry(i, yaffs_Object, hashLink); - if (in->objectId == number) { -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - /* Don't tell the VFS about this one if it is defered free */ - if (in->deferedFree) - return NULL; -#endif -#endif - return in; - } - } + if (!directory) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: Trying to add an object to a null pointer directory" + ); + BUG(); + return; } - - return NULL; -} - -yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, - yaffs_ObjectType type) -{ - - yaffs_Object *theObject; - yaffs_Tnode *tn = NULL; - - if (number < 0) { - number = yaffs_CreateNewObjectNumber(dev); + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: Trying to add an object to a non-directory" + ); + BUG(); } - theObject = yaffs_AllocateEmptyObject(dev); - if(!theObject) - return NULL; - - if(type == YAFFS_OBJECT_TYPE_FILE){ - tn = yaffs_GetTnode(dev); - if(!tn){ - yaffs_FreeObject(theObject); - return NULL; - } + if (obj->siblings.prev == NULL) { + /* Not initialised */ + BUG(); } + yaffs_verify_dir(directory); + yaffs_remove_obj_from_dir(obj); - if (theObject) { - theObject->fake = 0; - theObject->renameAllowed = 1; - theObject->unlinkAllowed = 1; - theObject->objectId = number; - yaffs_HashObject(theObject); - theObject->variantType = type; -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(theObject->win_atime); - theObject->win_ctime[0] = theObject->win_mtime[0] = - theObject->win_atime[0]; - theObject->win_ctime[1] = theObject->win_mtime[1] = - theObject->win_atime[1]; - -#else + /* Now add it */ + list_add(&obj->siblings, &directory->variant.dir_variant.children); + obj->parent = directory; - theObject->yst_atime = theObject->yst_mtime = - theObject->yst_ctime = Y_CURRENT_TIME; -#endif - switch (type) { - case YAFFS_OBJECT_TYPE_FILE: - theObject->variant.fileVariant.fileSize = 0; - theObject->variant.fileVariant.scannedFileSize = 0; - theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */ - theObject->variant.fileVariant.topLevel = 0; - theObject->variant.fileVariant.top = tn; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - INIT_LIST_HEAD(&theObject->variant.directoryVariant. - children); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - /* No action required */ - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* todo this should not happen */ - break; - } + if (directory == obj->my_dev->unlinked_dir + || directory == obj->my_dev->del_dir) { + obj->unlinked = 1; + obj->my_dev->n_unlinked_files++; + obj->rename_allowed = 0; } - return theObject; + yaffs_verify_dir(directory); + yaffs_verify_obj_in_dir(obj); } -static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device * dev, - int number, - yaffs_ObjectType type) +static int yaffs_change_obj_name(struct yaffs_obj *obj, + struct yaffs_obj *new_dir, + const YCHAR *new_name, int force, int shadows) { - yaffs_Object *theObject = NULL; + int unlink_op; + int del_op; + struct yaffs_obj *existing_target; - if (number > 0) { - theObject = yaffs_FindObjectByNumber(dev, number); - } + if (new_dir == NULL) + new_dir = obj->parent; /* use the old directory */ - if (!theObject) { - theObject = yaffs_CreateNewObject(dev, number, type); + if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_change_obj_name: new_dir is not a directory" + ); + BUG(); } - return theObject; + unlink_op = (new_dir == obj->my_dev->unlinked_dir); + del_op = (new_dir == obj->my_dev->del_dir); -} + existing_target = yaffs_find_by_name(new_dir, new_name); + /* If the object is a file going into the unlinked directory, + * then it is OK to just stuff it in since duplicate names are OK. + * else only proceed if the new name does not exist and we're putting + * it into a directory. + */ + if (!(unlink_op || del_op || force || + shadows > 0 || !existing_target) || + new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + return YAFFS_FAIL; -static YCHAR *yaffs_CloneString(const YCHAR * str) -{ - YCHAR *newStr = NULL; + yaffs_set_obj_name(obj, new_name); + obj->dirty = 1; + yaffs_add_obj_to_dir(new_dir, obj); - if (str && *str) { - newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR)); - if(newStr) - yaffs_strcpy(newStr, str); - } + if (unlink_op) + obj->unlinked = 1; - return newStr; + /* If it is a deletion then we mark it as a shrink for gc */ + if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= 0) + return YAFFS_OK; + return YAFFS_FAIL; } -/* - * Mknod (create) a new object. - * equivalentObject only has meaning for a hard link; - * aliasString only has meaning for a sumlink. - * rdev only has meaning for devices (a subset of special objects) +/*------------------------ Short Operations Cache ------------------------------ + * In many situations where there is no high level buffering a lot of + * reads might be short sequential reads, and a lot of writes may be short + * sequential writes. eg. scanning/writing a jpeg file. + * In these cases, a short read/write cache can provide a huge perfomance + * benefit with dumb-as-a-rock code. + * In Linux, the page cache provides read buffering and the short op cache + * provides write buffering. + * + * There are a small number (~10) of cache chunks per device so that we don't + * need a very intelligent search. */ -static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, - yaffs_Object * parent, - const YCHAR * name, - __u32 mode, - __u32 uid, - __u32 gid, - yaffs_Object * equivalentObject, - const YCHAR * aliasString, __u32 rdev) +static int yaffs_obj_cache_dirty(struct yaffs_obj *obj) { - yaffs_Object *in; - YCHAR *str = NULL; - - yaffs_Device *dev = parent->myDev; - - /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/ - if (yaffs_FindObjectByName(parent, name)) { - return NULL; - } - - in = yaffs_CreateNewObject(dev, -1, type); + struct yaffs_dev *dev = obj->my_dev; + int i; + struct yaffs_cache *cache; + int n_caches = obj->my_dev->param.n_caches; - if(type == YAFFS_OBJECT_TYPE_SYMLINK){ - str = yaffs_CloneString(aliasString); - if(!str){ - yaffs_FreeObject(in); - return NULL; - } + for (i = 0; i < n_caches; i++) { + cache = &dev->cache[i]; + if (cache->object == obj && cache->dirty) + return 1; } + return 0; +} +static void yaffs_flush_file_cache(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev = obj->my_dev; + int lowest = -99; /* Stop compiler whining. */ + int i; + struct yaffs_cache *cache; + int chunk_written = 0; + int n_caches = obj->my_dev->param.n_caches; - if (in) { - in->chunkId = -1; - in->valid = 1; - in->variantType = type; - - in->yst_mode = mode; - -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(in->win_atime); - in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0]; - in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1]; - -#else - in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME; - - in->yst_rdev = rdev; - in->yst_uid = uid; - in->yst_gid = gid; -#endif - in->nDataChunks = 0; - - yaffs_SetObjectName(in, name); - in->dirty = 1; - - yaffs_AddObjectToDirectory(parent, in); - - in->myDev = parent->myDev; - - switch (type) { - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = str; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant.equivalentObject = - equivalentObject; - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObject->objectId; - list_add(&in->hardLinks, &equivalentObject->hardLinks); - break; - case YAFFS_OBJECT_TYPE_FILE: - case YAFFS_OBJECT_TYPE_DIRECTORY: - case YAFFS_OBJECT_TYPE_SPECIAL: - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* do nothing */ - break; + if (n_caches < 1) + return; + do { + cache = NULL; + + /* Find the lowest dirty chunk for this object */ + for (i = 0; i < n_caches; i++) { + if (dev->cache[i].object == obj && + dev->cache[i].dirty) { + if (!cache || + dev->cache[i].chunk_id < lowest) { + cache = &dev->cache[i]; + lowest = cache->chunk_id; + } + } } - if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) { - /* Could not create the object header, fail the creation */ - yaffs_DestroyObject(in); - in = NULL; + if (cache && !cache->locked) { + /* Write it out and free it up */ + chunk_written = + yaffs_wr_data_obj(cache->object, + cache->chunk_id, + cache->data, + cache->n_bytes, 1); + cache->dirty = 0; + cache->object = NULL; } + } while (cache && chunk_written > 0); - } - - return in; + if (cache) + /* Hoosterman, disk full while writing cache out. */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: no space during cache write"); } -yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, - uid, gid, NULL, NULL, 0); -} +/*yaffs_flush_whole_cache(dev) + * + * + */ -yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid) +void yaffs_flush_whole_cache(struct yaffs_dev *dev) { - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, - mode, uid, gid, NULL, NULL, 0); -} + struct yaffs_obj *obj; + int n_caches = dev->param.n_caches; + int i; -yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, __u32 rdev) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, - uid, gid, NULL, NULL, rdev); -} + /* Find a dirty object in the cache and flush it... + * until there are no further dirty objects. + */ + do { + obj = NULL; + for (i = 0; i < n_caches && !obj; i++) { + if (dev->cache[i].object && dev->cache[i].dirty) + obj = dev->cache[i].object; + } + if (obj) + yaffs_flush_file_cache(obj); + } while (obj); -yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, - const YCHAR * alias) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, - uid, gid, NULL, alias, 0); } -/* yaffs_Link returns the object id of the equivalent object.*/ -yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name, - yaffs_Object * equivalentObject) +/* Grab us a cache chunk for use. + * First look for an empty one. + * Then look for the least recently used non-dirty one. + * Then look for the least recently used dirty one...., flush and look again. + */ +static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev) { - /* Get the real object in case we were fed a hard link as an equivalent object */ - equivalentObject = yaffs_GetEquivalentObject(equivalentObject); + int i; - if (yaffs_MknodObject - (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0, - equivalentObject, NULL, 0)) { - return equivalentObject; - } else { - return NULL; + if (dev->param.n_caches > 0) { + for (i = 0; i < dev->param.n_caches; i++) { + if (!dev->cache[i].object) + return &dev->cache[i]; + } } - + return NULL; } -static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir, - const YCHAR * newName, int force, int shadows) +static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev) { - int unlinkOp; - int deleteOp; - - yaffs_Object *existingTarget; - - if (newDir == NULL) { - newDir = obj->parent; /* use the old directory */ - } - - if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragendy: yaffs_ChangeObjectName: newDir is not a directory" - TENDSTR))); - YBUG(); - } - - /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */ - if (obj->myDev->isYaffs2) { - unlinkOp = (newDir == obj->myDev->unlinkedDir); - } else { - unlinkOp = (newDir == obj->myDev->unlinkedDir - && obj->variantType == YAFFS_OBJECT_TYPE_FILE); - } + struct yaffs_cache *cache; + struct yaffs_obj *the_obj; + int usage; + int i; + int pushout; - deleteOp = (newDir == obj->myDev->deletedDir); + if (dev->param.n_caches < 1) + return NULL; - existingTarget = yaffs_FindObjectByName(newDir, newName); + /* Try find a non-dirty one... */ - /* If the object is a file going into the unlinked directory, - * then it is OK to just stuff it in since duplicate names are allowed. - * else only proceed if the new name does not exist and if we're putting - * it into a directory. - */ - if ((unlinkOp || - deleteOp || - force || - (shadows > 0) || - !existingTarget) && - newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_SetObjectName(obj, newName); - obj->dirty = 1; + cache = yaffs_grab_chunk_worker(dev); - yaffs_AddObjectToDirectory(newDir, obj); + if (!cache) { + /* They were all dirty, find the LRU object and flush + * its cache, then find again. + * NB what's here is not very accurate, + * we actually flush the object with the LRU chunk. + */ - if (unlinkOp) - obj->unlinked = 1; + /* With locking we can't assume we can use entry zero, + * Set the_obj to a valid pointer for Coverity. */ + the_obj = dev->cache[0].object; + usage = -1; + cache = NULL; + pushout = -1; + + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object && + !dev->cache[i].locked && + (dev->cache[i].last_use < usage || + !cache)) { + usage = dev->cache[i].last_use; + the_obj = dev->cache[i].object; + cache = &dev->cache[i]; + pushout = i; + } + } - /* If it is a deletion then we mark it as a shrink for gc purposes. */ - if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows)>= 0) - return YAFFS_OK; + if (!cache || cache->dirty) { + /* Flush and try again */ + yaffs_flush_file_cache(the_obj); + cache = yaffs_grab_chunk_worker(dev); + } } - - return YAFFS_FAIL; + return cache; } -int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, - yaffs_Object * newDir, const YCHAR * newName) +/* Find a cached chunk */ +static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj, + int chunk_id) { - yaffs_Object *obj; - yaffs_Object *existingTarget; - int force = 0; + struct yaffs_dev *dev = obj->my_dev; + int i; -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - /* Special case for case insemsitive systems (eg. WinCE). - * While look-up is case insensitive, the name isn't. - * Therefore we might want to change x.txt to X.txt - */ - if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0) { - force = 1; - } -#endif + if (dev->param.n_caches < 1) + return NULL; - obj = yaffs_FindObjectByName(oldDir, oldName); - /* Check new name to long. */ - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK && - yaffs_strlen(newName) > YAFFS_MAX_ALIAS_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - else if (obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK && - yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - - if (obj && obj->renameAllowed) { - - /* Now do the handling for an existing target, if there is one */ - - existingTarget = yaffs_FindObjectByName(newDir, newName); - if (existingTarget && - existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && - !list_empty(&existingTarget->variant.directoryVariant.children)) { - /* There is a target that is a non-empty directory, so we fail */ - return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ - } else if (existingTarget && existingTarget != obj) { - /* Nuke the target first, using shadowing, - * but only if it isn't the same object - */ - yaffs_ChangeObjectName(obj, newDir, newName, force, - existingTarget->objectId); - yaffs_UnlinkObject(existingTarget); - } + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object == obj && + dev->cache[i].chunk_id == chunk_id) { + dev->cache_hits++; - return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); + return &dev->cache[i]; + } } - return YAFFS_FAIL; + return NULL; } -/*------------------------- Block Management and Page Allocation ----------------*/ - -static int yaffs_InitialiseBlocks(yaffs_Device * dev) +/* Mark the chunk for the least recently used algorithym */ +static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache, + int is_write) { - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - - dev->blockInfo = NULL; - dev->chunkBits = NULL; - - dev->allocationBlock = -1; /* force it to get a new one */ + int i; - /* If the first allocation strategy fails, thry the alternate one */ - dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo)); - if(!dev->blockInfo){ - dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo)); - dev->blockInfoAlt = 1; - } - else - dev->blockInfoAlt = 0; + if (dev->param.n_caches < 1) + return; - if(dev->blockInfo){ + if (dev->cache_last_use < 0 || + dev->cache_last_use > 100000000) { + /* Reset the cache usages */ + for (i = 1; i < dev->param.n_caches; i++) + dev->cache[i].last_use = 0; - /* Set up dynamic blockinfo stuff. */ - dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */ - dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks); - if(!dev->chunkBits){ - dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks); - dev->chunkBitsAlt = 1; - } - else - dev->chunkBitsAlt = 0; + dev->cache_last_use = 0; } + dev->cache_last_use++; + cache->last_use = dev->cache_last_use; - if (dev->blockInfo && dev->chunkBits) { - memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo)); - memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks); - return YAFFS_OK; - } - - return YAFFS_FAIL; - + if (is_write) + cache->dirty = 1; } -static void yaffs_DeinitialiseBlocks(yaffs_Device * dev) +/* Invalidate a single cache page. + * Do this when a whole page gets written, + * ie the short cache for this page is no longer valid. + */ +static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id) { - if(dev->blockInfoAlt && dev->blockInfo) - YFREE_ALT(dev->blockInfo); - else if(dev->blockInfo) - YFREE(dev->blockInfo); + struct yaffs_cache *cache; - dev->blockInfoAlt = 0; + if (object->my_dev->param.n_caches > 0) { + cache = yaffs_find_chunk_cache(object, chunk_id); - dev->blockInfo = NULL; - - if(dev->chunkBitsAlt && dev->chunkBits) - YFREE_ALT(dev->chunkBits); - else if(dev->chunkBits) - YFREE(dev->chunkBits); - dev->chunkBitsAlt = 0; - dev->chunkBits = NULL; + if (cache) + cache->object = NULL; + } } -static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev, - yaffs_BlockInfo * bi) +/* Invalidate all the cache pages associated with this object + * Do this whenever ther file is deleted or resized. + */ +static void yaffs_invalidate_whole_cache(struct yaffs_obj *in) { int i; - __u32 seq; - yaffs_BlockInfo *b; - - if (!dev->isYaffs2) - return 1; /* disqualification only applies to yaffs2. */ + struct yaffs_dev *dev = in->my_dev; - if (!bi->hasShrinkHeader) - return 1; /* can gc */ - - /* Find the oldest dirty sequence number if we don't know it and save it - * so we don't have to keep recomputing it. - */ - if (!dev->oldestDirtySequence) { - seq = dev->sequenceNumber; - - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; - i++) { - b = yaffs_GetBlockInfo(dev, i); - if (b->blockState == YAFFS_BLOCK_STATE_FULL && - (b->pagesInUse - b->softDeletions) < - dev->nChunksPerBlock && b->sequenceNumber < seq) { - seq = b->sequenceNumber; - } + if (dev->param.n_caches > 0) { + /* Invalidate it. */ + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object == in) + dev->cache[i].object = NULL; } - dev->oldestDirtySequence = seq; } - - /* Can't do gc of this block if there are any blocks older than this one that have - * discarded pages. - */ - return (bi->sequenceNumber <= dev->oldestDirtySequence); - } -/* FindDiretiestBlock is used to select the dirtiest block (or close enough) - * for garbage collection. - */ - -static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, - int aggressive) +static void yaffs_unhash_obj(struct yaffs_obj *obj) { + int bucket; + struct yaffs_dev *dev = obj->my_dev; - int b = dev->currentDirtyChecker; - - int i; - int iterations; - int dirtiest = -1; - int pagesInUse = 0; - int prioritised=0; - yaffs_BlockInfo *bi; - int pendingPrioritisedExist = 0; - - /* First let's see if we need to grab a prioritised block */ - if(dev->hasPendingPrioritisedGCs){ - for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){ - - bi = yaffs_GetBlockInfo(dev, i); - //yaffs_VerifyBlock(dev,bi,i); - - if(bi->gcPrioritise) { - pendingPrioritisedExist = 1; - if(bi->blockState == YAFFS_BLOCK_STATE_FULL && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)){ - pagesInUse = (bi->pagesInUse - bi->softDeletions); - dirtiest = i; - prioritised = 1; - aggressive = 1; /* Fool the non-aggressive skip logiv below */ - } - } - } - - if(!pendingPrioritisedExist) /* None found, so we can clear this */ - dev->hasPendingPrioritisedGCs = 0; + /* If it is still linked into the bucket list, free from the list */ + if (!list_empty(&obj->hash_link)) { + list_del_init(&obj->hash_link); + bucket = yaffs_hash_fn(obj->obj_id); + dev->obj_bucket[bucket].count--; } +} - /* If we're doing aggressive GC then we are happy to take a less-dirty block, and - * search harder. - * else (we're doing a leasurely gc), then we only bother to do this if the - * block has only a few pages in use. - */ - - dev->nonAggressiveSkip--; +/* FreeObject frees up a Object and puts it back on the free list */ +static void yaffs_free_obj(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev; - if (!aggressive && (dev->nonAggressiveSkip > 0)) { - return -1; + if (!obj) { + BUG(); + return; } + dev = obj->my_dev; + yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p", + obj, obj->my_inode); + if (obj->parent) + BUG(); + if (!list_empty(&obj->siblings)) + BUG(); - if(!prioritised) - pagesInUse = - (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; - - if (aggressive) { - iterations = - dev->internalEndBlock - dev->internalStartBlock + 1; - } else { - iterations = - dev->internalEndBlock - dev->internalStartBlock + 1; - iterations = iterations / 16; - if (iterations > 200) { - iterations = 200; - } + if (obj->my_inode) { + /* We're still hooked up to a cached inode. + * Don't delete now, but mark for later deletion + */ + obj->defered_free = 1; + return; } - for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) { - b++; - if (b < dev->internalStartBlock || b > dev->internalEndBlock) { - b = dev->internalStartBlock; - } + yaffs_unhash_obj(obj); - if (b < dev->internalStartBlock || b > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> Block %d is not valid" TENDSTR), b)); - YBUG(); - } + yaffs_free_raw_obj(dev, obj); + dev->n_obj--; + dev->checkpoint_blocks_required = 0; /* force recalculation */ +} - bi = yaffs_GetBlockInfo(dev, b); +void yaffs_handle_defered_free(struct yaffs_obj *obj) +{ + if (obj->defered_free) + yaffs_free_obj(obj); +} -#if 0 - if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) { - dirtiest = b; - pagesInUse = 0; - } - else -#endif +static int yaffs_generic_obj_del(struct yaffs_obj *in) +{ + /* Iinvalidate the file's data in the cache, without flushing. */ + yaffs_invalidate_whole_cache(in); - if (bi->blockState == YAFFS_BLOCK_STATE_FULL && - (bi->pagesInUse - bi->softDeletions) < pagesInUse && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { - dirtiest = b; - pagesInUse = (bi->pagesInUse - bi->softDeletions); - } + if (in->my_dev->param.is_yaffs2 && in->parent != in->my_dev->del_dir) { + /* Move to unlinked directory so we have a deletion record */ + yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, + 0); } - dev->currentDirtyChecker = b; + yaffs_remove_obj_from_dir(in); + yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); + in->hdr_chunk = 0; - if (dirtiest > 0) { - T(YAFFS_TRACE_GC, - (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest, - dev->nChunksPerBlock - pagesInUse,prioritised)); - } + yaffs_free_obj(in); + return YAFFS_OK; - dev->oldestDirtySequence = 0; +} - if (dirtiest > 0) { - dev->nonAggressiveSkip = 4; - } +static void yaffs_soft_del_file(struct yaffs_obj *obj) +{ + if (!obj->deleted || + obj->variant_type != YAFFS_OBJECT_TYPE_FILE || + obj->soft_del) + return; - return dirtiest; + if (obj->n_data_chunks <= 0) { + /* Empty file with no duplicate object headers, + * just delete it immediately */ + yaffs_free_tnode(obj->my_dev, obj->variant.file_variant.top); + obj->variant.file_variant.top = NULL; + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: Deleting empty file %d", + obj->obj_id); + yaffs_generic_obj_del(obj); + } else { + yaffs_soft_del_worker(obj, + obj->variant.file_variant.top, + obj->variant. + file_variant.top_level, 0); + obj->soft_del = 1; + } } -static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo) +/* Pruning removes any part of the file structure tree that is beyond the + * bounds of the file (ie that does not point to chunks). + * + * A file should only get pruned when its size is reduced. + * + * Before pruning, the chunks must be pulled from the tree and the + * level 0 tnode entries must be zeroed out. + * Could also use this for file deletion, but that's probably better handled + * by a special case. + * + * This function is recursive. For levels > 0 the function is called again on + * any sub-tree. For level == 0 we just check if the sub-tree has data. + * If there is no data in a subtree then it is pruned. + */ + +static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev, + struct yaffs_tnode *tn, u32 level, + int del0) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo); + int i; + int has_data; - int erasedOk = 0; + if (!tn) + return tn; - /* If the block is still healthy erase it and mark as clean. - * If the block has had a data failure, then retire it. - */ - - T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, - (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR), - blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : "")); + has_data = 0; - bi->blockState = YAFFS_BLOCK_STATE_DIRTY; + if (level > 0) { + for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i]) { + tn->internal[i] = + yaffs_prune_worker(dev, + tn->internal[i], + level - 1, + (i == 0) ? del0 : 1); + } - if (!bi->needsRetiring) { - yaffs_InvalidateCheckpoint(dev); - erasedOk = yaffs_EraseBlockInNAND(dev, blockNo); - if (!erasedOk) { - dev->nErasureFailures++; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Erasure failed %d" TENDSTR), blockNo)); + if (tn->internal[i]) + has_data++; } - } + } else { + int tnode_size_u32 = dev->tnode_size / sizeof(u32); + u32 *map = (u32 *) tn; - if (erasedOk && - ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) { - int i; - for (i = 0; i < dev->nChunksPerBlock; i++) { - if (!yaffs_CheckChunkErased - (dev, blockNo * dev->nChunksPerBlock + i)) { - T(YAFFS_TRACE_ERROR, - (TSTR - (">>Block %d erasure supposedly OK, but chunk %d not erased" - TENDSTR), blockNo, i)); - } + for (i = 0; !has_data && i < tnode_size_u32; i++) { + if (map[i]) + has_data++; } } - if (erasedOk) { - /* Clean it up... */ - bi->blockState = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - bi->pagesInUse = 0; - bi->softDeletions = 0; - bi->hasShrinkHeader = 0; - bi->skipErasedCheck = 1; /* This is clean, so no need to check */ - bi->gcPrioritise = 0; - yaffs_ClearChunkBits(dev, blockNo); - - T(YAFFS_TRACE_ERASE, - (TSTR("Erased block %d" TENDSTR), blockNo)); - } else { - dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */ - - yaffs_RetireBlock(dev, blockNo); - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d retired" TENDSTR), blockNo)); + if (has_data == 0 && del0) { + /* Free and return NULL */ + yaffs_free_tnode(dev, tn); + tn = NULL; } + return tn; } -static int yaffs_FindBlockForAllocation(yaffs_Device * dev) +static int yaffs_prune_tree(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct) { int i; + int has_data; + int done = 0; + struct yaffs_tnode *tn; - yaffs_BlockInfo *bi; + if (file_struct->top_level < 1) + return YAFFS_OK; - if (dev->nErasedBlocks < 1) { - /* Hoosterman we've got a problem. - * Can't get space to gc - */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR))); + file_struct->top = + yaffs_prune_worker(dev, file_struct->top, file_struct->top_level, 0); - return -1; - } + /* Now we have a tree with all the non-zero branches NULL but + * the height is the same as it was. + * Let's see if we can trim internal tnodes to shorten the tree. + * We can do this if only the 0th element in the tnode is in use + * (ie all the non-zero are NULL) + */ - /* Find an empty block. */ + while (file_struct->top_level && !done) { + tn = file_struct->top; - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - dev->allocationBlockFinder++; - if (dev->allocationBlockFinder < dev->internalStartBlock - || dev->allocationBlockFinder > dev->internalEndBlock) { - dev->allocationBlockFinder = dev->internalStartBlock; + has_data = 0; + for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i]) + has_data++; } - bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder); - - if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) { - bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING; - dev->sequenceNumber++; - bi->sequenceNumber = dev->sequenceNumber; - dev->nErasedBlocks--; - T(YAFFS_TRACE_ALLOCATE, - (TSTR("Allocated block %d, seq %d, %d left" TENDSTR), - dev->allocationBlockFinder, dev->sequenceNumber, - dev->nErasedBlocks)); - return dev->allocationBlockFinder; + if (!has_data) { + file_struct->top = tn->internal[0]; + file_struct->top_level--; + yaffs_free_tnode(dev, tn); + } else { + done = 1; } } - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs tragedy: no more eraased blocks, but there should have been %d" - TENDSTR), dev->nErasedBlocks)); - - return -1; + return YAFFS_OK; } +/*-------------------- End of File Structure functions.-------------------*/ -// Check if there's space to allocate... -// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()? -static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev) +/* alloc_empty_obj gets us a clean Object.*/ +static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev) { - int reservedChunks; - int reservedBlocks = dev->nReservedBlocks; - int checkpointBlocks; + struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev); - checkpointBlocks = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint; - if(checkpointBlocks < 0) - checkpointBlocks = 0; + if (!obj) + return obj; - reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock); + dev->n_obj++; - return (dev->nFreeChunks > reservedChunks); -} + /* Now sweeten it up... */ -static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr) -{ - int retVal; - yaffs_BlockInfo *bi; + memset(obj, 0, sizeof(struct yaffs_obj)); + obj->being_created = 1; - if (dev->allocationBlock < 0) { - /* Get next block to allocate off */ - dev->allocationBlock = yaffs_FindBlockForAllocation(dev); - dev->allocationPage = 0; - } + obj->my_dev = dev; + obj->hdr_chunk = 0; + obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN; + INIT_LIST_HEAD(&(obj->hard_links)); + INIT_LIST_HEAD(&(obj->hash_link)); + INIT_LIST_HEAD(&obj->siblings); - if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) { - /* Not enough space to allocate unless we're allowed to use the reserve. */ - return -1; + /* Now make the directory sane */ + if (dev->root_dir) { + obj->parent = dev->root_dir; + list_add(&(obj->siblings), + &dev->root_dir->variant.dir_variant.children); } - if (dev->nErasedBlocks < dev->nReservedBlocks - && dev->allocationPage == 0) { - T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR))); - } - - /* Next page please.... */ - if (dev->allocationBlock >= 0) { - bi = yaffs_GetBlockInfo(dev, dev->allocationBlock); - - retVal = (dev->allocationBlock * dev->nChunksPerBlock) + - dev->allocationPage; - bi->pagesInUse++; - yaffs_SetChunkBit(dev, dev->allocationBlock, - dev->allocationPage); - - dev->allocationPage++; - - dev->nFreeChunks--; - - /* If the block is full set the state to full */ - if (dev->allocationPage >= dev->nChunksPerBlock) { - bi->blockState = YAFFS_BLOCK_STATE_FULL; - dev->allocationBlock = -1; - } - - if(blockUsedPtr) - *blockUsedPtr = bi; + /* Add it to the lost and found directory. + * NB Can't put root or lost-n-found in lost-n-found so + * check if lost-n-found exists first + */ + if (dev->lost_n_found) + yaffs_add_obj_to_dir(dev->lost_n_found, obj); - return retVal; - } + obj->being_created = 0; - T(YAFFS_TRACE_ERROR, - (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); + dev->checkpoint_blocks_required = 0; /* force recalculation */ - return -1; + return obj; } -static int yaffs_GetErasedChunks(yaffs_Device * dev) +static int yaffs_find_nice_bucket(struct yaffs_dev *dev) { - int n; + int i; + int l = 999; + int lowest = 999999; - n = dev->nErasedBlocks * dev->nChunksPerBlock; + /* Search for the shortest list or one that + * isn't too long. + */ - if (dev->allocationBlock > 0) { - n += (dev->nChunksPerBlock - dev->allocationPage); + for (i = 0; i < 10 && lowest > 4; i++) { + dev->bucket_finder++; + dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS; + if (dev->obj_bucket[dev->bucket_finder].count < lowest) { + lowest = dev->obj_bucket[dev->bucket_finder].count; + l = dev->bucket_finder; + } } - return n; - + return l; } -static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) +static int yaffs_new_obj_id(struct yaffs_dev *dev) { - int oldChunk; - int newChunk; - int chunkInBlock; - int markNAND; - int retVal = YAFFS_OK; - int cleanups = 0; - int i; - int isCheckpointBlock; - int matchingChunk; - - int chunksBefore = yaffs_GetErasedChunks(dev); - int chunksAfter; - - yaffs_ExtendedTags tags; - - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block); - - yaffs_Object *object; - - isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT); - - bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; - - T(YAFFS_TRACE_TRACING, - (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR), block, - bi->pagesInUse, bi->hasShrinkHeader)); - - /*yaffs_VerifyFreeChunks(dev); */ - - bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */ + int bucket = yaffs_find_nice_bucket(dev); + int found = 0; + struct list_head *i; + u32 n = (u32) bucket; - /* Take off the number of soft deleted entries because - * they're going to get really deleted during GC. + /* Now find an object value that has not already been taken + * by scanning the list. */ - dev->nFreeChunks -= bi->softDeletions; - - dev->isDoingGC = 1; - - if (isCheckpointBlock || - !yaffs_StillSomeChunkBits(dev, block)) { - T(YAFFS_TRACE_TRACING, - (TSTR - ("Collecting block %d that has no chunks in use" TENDSTR), - block)); - yaffs_BlockBecameDirty(dev, block); - } else { - - __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); - - yaffs_VerifyBlock(dev,bi,block); - - for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock; - chunkInBlock < dev->nChunksPerBlock - && yaffs_StillSomeChunkBits(dev, block); - chunkInBlock++, oldChunk++) { - if (yaffs_CheckChunkBit(dev, block, chunkInBlock)) { - - /* This page is in use and might need to be copied off */ - markNAND = 1; - - yaffs_InitialiseTags(&tags); - - yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk, - buffer, &tags); - - object = - yaffs_FindObjectByNumber(dev, - tags.objectId); - - T(YAFFS_TRACE_GC_DETAIL, - (TSTR - ("Collecting page %d, %d %d %d " TENDSTR), - chunkInBlock, tags.objectId, tags.chunkId, - tags.byteCount)); - - if(object && !yaffs_SkipVerification(dev)){ - if(tags.chunkId == 0) - matchingChunk = object->chunkId; - else if(object->softDeleted) - matchingChunk = oldChunk; /* Defeat the test */ - else - matchingChunk = yaffs_FindChunkInFile(object,tags.chunkId,NULL); - - if(oldChunk != matchingChunk) - T(YAFFS_TRACE_ERROR, - (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), - oldChunk,matchingChunk,tags.objectId, tags.chunkId)); - - } - - if (!object) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("page %d in gc has no object: %d %d %d " - TENDSTR), oldChunk, - tags.objectId, tags.chunkId, tags.byteCount)); - } - - if (object && object->deleted - && tags.chunkId != 0) { - /* Data chunk in a deleted file, throw it away - * It's a soft deleted data chunk, - * No need to copy this, just forget about it and - * fix up the object. - */ - - object->nDataChunks--; - - if (object->nDataChunks <= 0) { - /* remeber to clean up the object */ - dev->gcCleanupList[cleanups] = - tags.objectId; - cleanups++; - } - markNAND = 0; - } else if (0 - /* Todo object && object->deleted && object->nDataChunks == 0 */ - ) { - /* Deleted object header with no data chunks. - * Can be discarded and the file deleted. - */ - object->chunkId = 0; - yaffs_FreeTnode(object->myDev, - object->variant. - fileVariant.top); - object->variant.fileVariant.top = NULL; - yaffs_DoGenericObjectDeletion(object); - - } else if (object) { - /* It's either a data chunk in a live file or - * an ObjectHeader, so we're interested in it. - * NB Need to keep the ObjectHeaders of deleted files - * until the whole file has been deleted off - */ - tags.serialNumber++; - - dev->nGCCopies++; - - if (tags.chunkId == 0) { - /* It is an object Id, - * We need to nuke the shrinkheader flags first - * We no longer want the shrinkHeader flag since its work is done - * and if it is left in place it will mess up scanning. - * Also, clear out any shadowing stuff - */ - - yaffs_ObjectHeader *oh; - oh = (yaffs_ObjectHeader *)buffer; - oh->isShrink = 0; - oh->shadowsObject = -1; - tags.extraShadows = 0; - tags.extraIsShrinkHeader = 0; - - yaffs_VerifyObjectHeader(object,oh,&tags,1); - } - - newChunk = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1); - - if (newChunk < 0) { - retVal = YAFFS_FAIL; - } else { - - /* Ok, now fix up the Tnodes etc. */ - - if (tags.chunkId == 0) { - /* It's a header */ - object->chunkId = newChunk; - object->serial = tags.serialNumber; - } else { - /* It's a data chunk */ - yaffs_PutChunkIntoFile - (object, - tags.chunkId, - newChunk, 0); - } - } + while (!found) { + found = 1; + n += YAFFS_NOBJECT_BUCKETS; + if (1 || dev->obj_bucket[bucket].count > 0) { + list_for_each(i, &dev->obj_bucket[bucket].list) { + /* If there is already one in the list */ + if (i && list_entry(i, struct yaffs_obj, + hash_link)->obj_id == n) { + found = 0; } - - yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__); - } } + } + return n; +} - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); +static void yaffs_hash_obj(struct yaffs_obj *in) +{ + int bucket = yaffs_hash_fn(in->obj_id); + struct yaffs_dev *dev = in->my_dev; + list_add(&in->hash_link, &dev->obj_bucket[bucket].list); + dev->obj_bucket[bucket].count++; +} - /* Do any required cleanups */ - for (i = 0; i < cleanups; i++) { - /* Time to delete the file too */ - object = - yaffs_FindObjectByNumber(dev, - dev->gcCleanupList[i]); - if (object) { - yaffs_FreeTnode(dev, - object->variant.fileVariant. - top); - object->variant.fileVariant.top = NULL; - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: About to finally delete object %d" - TENDSTR), object->objectId)); - yaffs_DoGenericObjectDeletion(object); - object->myDev->nDeletedFiles--; - } +struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number) +{ + int bucket = yaffs_hash_fn(number); + struct list_head *i; + struct yaffs_obj *in; + list_for_each(i, &dev->obj_bucket[bucket].list) { + /* Look if it is in the list */ + in = list_entry(i, struct yaffs_obj, hash_link); + if (in->obj_id == number) { + /* Don't show if it is defered free */ + if (in->defered_free) + return NULL; + return in; } - - } - - yaffs_VerifyCollectedBlock(dev,bi,block); - - if (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) { - T(YAFFS_TRACE_GC, - (TSTR - ("gc did not increase free chunks before %d after %d" - TENDSTR), chunksBefore, chunksAfter)); } - dev->isDoingGC = 0; - - return retVal; + return NULL; } -/* New garbage collector - * If we're very low on erased blocks then we do aggressive garbage collection - * otherwise we do "leasurely" garbage collection. - * Aggressive gc looks further (whole array) and will accept less dirty blocks. - * Passive gc only inspects smaller areas and will only accept more dirty blocks. - * - * The idea is to help clear out space in a more spread-out manner. - * Dunno if it really does anything useful. - */ -static int yaffs_CheckGarbageCollection(yaffs_Device * dev) +struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number, + enum yaffs_obj_type type) { - int block; - int aggressive; - int gcOk = YAFFS_OK; - int maxTries = 0; + struct yaffs_obj *the_obj = NULL; + struct yaffs_tnode *tn = NULL; - int checkpointBlockAdjust; + if (number < 0) + number = yaffs_new_obj_id(dev); - if (dev->isDoingGC) { - /* Bail out so we don't get recursive gc */ - return YAFFS_OK; + if (type == YAFFS_OBJECT_TYPE_FILE) { + tn = yaffs_get_tnode(dev); + if (!tn) + return NULL; } - /* This loop should pass the first time. - * We'll only see looping here if the erase of the collected block fails. - */ - - do { - maxTries++; + the_obj = yaffs_alloc_empty_obj(dev); + if (!the_obj) { + if (tn) + yaffs_free_tnode(dev, tn); + return NULL; + } - checkpointBlockAdjust = (dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint); - if(checkpointBlockAdjust < 0) - checkpointBlockAdjust = 0; + the_obj->fake = 0; + the_obj->rename_allowed = 1; + the_obj->unlink_allowed = 1; + the_obj->obj_id = number; + yaffs_hash_obj(the_obj); + the_obj->variant_type = type; + yaffs_load_current_time(the_obj, 1, 1); - if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) { - /* We need a block soon...*/ - aggressive = 1; - } else { - /* We're in no hurry */ - aggressive = 0; - } - - block = yaffs_FindBlockForGarbageCollection(dev, aggressive); + switch (type) { + case YAFFS_OBJECT_TYPE_FILE: + the_obj->variant.file_variant.file_size = 0; + the_obj->variant.file_variant.scanned_size = 0; + the_obj->variant.file_variant.shrink_size = + yaffs_max_file_size(dev); + the_obj->variant.file_variant.top_level = 0; + the_obj->variant.file_variant.top = tn; + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + INIT_LIST_HEAD(&the_obj->variant.dir_variant.children); + INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty); + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + case YAFFS_OBJECT_TYPE_HARDLINK: + case YAFFS_OBJECT_TYPE_SPECIAL: + /* No action required */ + break; + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* todo this should not happen */ + break; + } + return the_obj; +} - if (block > 0) { - dev->garbageCollections++; - if (!aggressive) { - dev->passiveGarbageCollections++; - } +static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev, + int number, u32 mode) +{ - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR), - dev->nErasedBlocks, aggressive)); + struct yaffs_obj *obj = + yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - gcOk = yaffs_GarbageCollectBlock(dev, block); - } + if (!obj) + return NULL; - if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) { - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" - TENDSTR), dev->nErasedBlocks, maxTries, block)); - } - } while ((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0) - && (maxTries < 2)); + obj->fake = 1; /* it is fake so it might not use NAND */ + obj->rename_allowed = 0; + obj->unlink_allowed = 0; + obj->deleted = 0; + obj->unlinked = 0; + obj->yst_mode = mode; + obj->my_dev = dev; + obj->hdr_chunk = 0; /* Not a valid chunk. */ + return obj; - return aggressive ? gcOk : YAFFS_OK; } -/*------------------------- TAGS --------------------------------*/ -static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId, - int chunkInObject) +static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev) { - return (tags->chunkId == chunkInObject && - tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0; - -} + int i; + dev->n_obj = 0; + dev->n_tnodes = 0; + yaffs_init_raw_tnodes_and_objs(dev); -/*-------------------- Data file manipulation -----------------*/ + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + INIT_LIST_HEAD(&dev->obj_bucket[i].list); + dev->obj_bucket[i].count = 0; + } +} -static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags) +struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, + int number, + enum yaffs_obj_type type) { - /*Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_Tnode *tn; - int theChunk = -1; - yaffs_ExtendedTags localTags; - int retVal = -1; + struct yaffs_obj *the_obj = NULL; - yaffs_Device *dev = in->myDev; + if (number > 0) + the_obj = yaffs_find_by_number(dev, number); - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; - } - - tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); + if (!the_obj) + the_obj = yaffs_new_obj(dev, number, type); - if (tn) { - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); + return the_obj; - retVal = - yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, - chunkInInode); - } - return retVal; } -static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags) +YCHAR *yaffs_clone_str(const YCHAR *str) { - /* Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_Tnode *tn; - int theChunk = -1; - yaffs_ExtendedTags localTags; + YCHAR *new_str = NULL; + int len; - yaffs_Device *dev = in->myDev; - int retVal = -1; + if (!str) + str = _Y(""); - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; + len = yaffs_strnlen(str, YAFFS_MAX_ALIAS_LENGTH); + new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS); + if (new_str) { + yaffs_strncpy(new_str, str, len); + new_str[len] = 0; } + return new_str; - tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); - - if (tn) { - - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); +} +/* + *yaffs_update_parent() handles fixing a directories mtime and ctime when a new + * link (ie. name) is created or deleted in the directory. + * + * ie. + * create dir/a : update dir's mtime/ctime + * rm dir/a: update dir's mtime/ctime + * modify dir/a: don't update dir's mtimme/ctime + * + * This can be handled immediately or defered. Defering helps reduce the number + * of updates when many files in a directory are changed within a brief period. + * + * If the directory updating is defered then yaffs_update_dirty_dirs must be + * called periodically. + */ - retVal = - yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, - chunkInInode); +static void yaffs_update_parent(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev; - /* Delete the entry in the filestructure (if found) */ - if (retVal != -1) { - yaffs_PutLevel0Tnode(dev,tn,chunkInInode,0); + if (!obj) + return; + dev = obj->my_dev; + obj->dirty = 1; + yaffs_load_current_time(obj, 0, 1); + if (dev->param.defered_dir_update) { + struct list_head *link = &obj->variant.dir_variant.dirty; + + if (list_empty(link)) { + list_add(link, &dev->dirty_dirs); + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "Added object %d to dirty directories", + obj->obj_id); } - } else { - /*T(("No level 0 found for %d\n", chunkInInode)); */ - } - if (retVal == -1) { - /* T(("Could not find %d to delete\n",chunkInInode)); */ + } else { + yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); } - return retVal; } -#ifdef YAFFS_PARANOID - -static int yaffs_CheckFileSanity(yaffs_Object * in) +void yaffs_update_dirty_dirs(struct yaffs_dev *dev) { - int chunk; - int nChunks; - int fSize; - int failed = 0; - int objId; - yaffs_Tnode *tn; - yaffs_Tags localTags; - yaffs_Tags *tags = &localTags; - int theChunk; - int chunkDeleted; - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - /* T(("Object not a file\n")); */ - return YAFFS_FAIL; - } - - objId = in->objectId; - fSize = in->variant.fileVariant.fileSize; - nChunks = - (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk; + struct list_head *link; + struct yaffs_obj *obj; + struct yaffs_dir_var *d_s; + union yaffs_obj_var *o_v; - for (chunk = 1; chunk <= nChunks; chunk++) { - tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant, - chunk); + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories"); - if (tn) { + while (!list_empty(&dev->dirty_dirs)) { + link = dev->dirty_dirs.next; + list_del_init(link); - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunk); + d_s = list_entry(link, struct yaffs_dir_var, dirty); + o_v = list_entry(d_s, union yaffs_obj_var, dir_variant); + obj = list_entry(o_v, struct yaffs_obj, variant); - if (yaffs_CheckChunkBits - (dev, theChunk / dev->nChunksPerBlock, - theChunk % dev->nChunksPerBlock)) { + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d", + obj->obj_id); - yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk, - tags, - &chunkDeleted); - if (yaffs_TagsMatch - (tags, in->objectId, chunk, chunkDeleted)) { - /* found it; */ - - } - } else { - - failed = 1; - } - - } else { - /* T(("No level 0 found for %d\n", chunk)); */ - } + if (obj->dirty) + yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); } - - return failed ? YAFFS_FAIL : YAFFS_OK; } -#endif +/* + * Mknod (create) a new object. + * equiv_obj only has meaning for a hard link; + * alias_str only has meaning for a symlink. + * rdev only has meaning for devices (a subset of special objects) + */ -static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, - int chunkInNAND, int inScan) +static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type, + struct yaffs_obj *parent, + const YCHAR *name, + u32 mode, + u32 uid, + u32 gid, + struct yaffs_obj *equiv_obj, + const YCHAR *alias_str, u32 rdev) { - /* NB inScan is zero unless scanning. - * For forward scanning, inScan is > 0; - * for backward scanning inScan is < 0 - */ - - yaffs_Tnode *tn; - yaffs_Device *dev = in->myDev; - int existingChunk; - yaffs_ExtendedTags existingTags; - yaffs_ExtendedTags newTags; - unsigned existingSerial, newSerial; - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - /* Just ignore an attempt at putting a chunk into a non-file during scanning - * If it is not during Scanning then something went wrong! - */ - if (!inScan) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy:attempt to put data chunk into a non-file" - TENDSTR))); - YBUG(); - } + struct yaffs_obj *in; + YCHAR *str = NULL; + struct yaffs_dev *dev = parent->my_dev; - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); - return YAFFS_OK; - } + /* Check if the entry exists. + * If it does then fail the call since we don't want a dup. */ + if (yaffs_find_by_name(parent, name)) + return NULL; - tn = yaffs_AddOrFindLevel0Tnode(dev, - &in->variant.fileVariant, - chunkInInode, - NULL); - if (!tn) { - return YAFFS_FAIL; + if (type == YAFFS_OBJECT_TYPE_SYMLINK) { + str = yaffs_clone_str(alias_str); + if (!str) + return NULL; } - existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); + in = yaffs_new_obj(dev, -1, type); - if (inScan != 0) { - /* If we're scanning then we need to test for duplicates - * NB This does not need to be efficient since it should only ever - * happen when the power fails during a write, then only one - * chunk should ever be affected. - * - * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO - * Update: For backward scanning we don't need to re-read tags so this is quite cheap. - */ - - if (existingChunk != 0) { - /* NB Right now existing chunk will not be real chunkId if the device >= 32MB - * thus we have to do a FindChunkInFile to get the real chunk id. - * - * We have a duplicate now we need to decide which one to use: - * - * Backwards scanning YAFFS2: The old one is what we use, dump the new one. - * Forward scanning YAFFS2: The new one is what we use, dump the old one. - * YAFFS1: Get both sets of tags and compare serial numbers. - */ - - if (inScan > 0) { - /* Only do this for forward scanning */ - yaffs_ReadChunkWithTagsFromNAND(dev, - chunkInNAND, - NULL, &newTags); + if (!in) { + kfree(str); + return NULL; + } - /* Do a proper find */ - existingChunk = - yaffs_FindChunkInFile(in, chunkInInode, - &existingTags); - } + in->hdr_chunk = 0; + in->valid = 1; + in->variant_type = type; - if (existingChunk <= 0) { - /*Hoosterman - how did this happen? */ + in->yst_mode = mode; - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: existing chunk < 0 in scan" - TENDSTR))); + yaffs_attribs_init(in, gid, uid, rdev); - } + in->n_data_chunks = 0; - /* NB The deleted flags should be false, otherwise the chunks will - * not be loaded during a scan - */ + yaffs_set_obj_name(in, name); + in->dirty = 1; - newSerial = newTags.serialNumber; - existingSerial = existingTags.serialNumber; + yaffs_add_obj_to_dir(parent, in); - if ((inScan > 0) && - (in->myDev->isYaffs2 || - existingChunk <= 0 || - ((existingSerial + 1) & 3) == newSerial)) { - /* Forward scanning. - * Use new - * Delete the old one and drop through to update the tnode - */ - yaffs_DeleteChunk(dev, existingChunk, 1, - __LINE__); - } else { - /* Backward scanning or we want to use the existing one - * Use existing. - * Delete the new one and return early so that the tnode isn't changed - */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, - __LINE__); - return YAFFS_OK; - } - } + in->my_dev = parent->my_dev; + switch (type) { + case YAFFS_OBJECT_TYPE_SYMLINK: + in->variant.symlink_variant.alias = str; + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + in->variant.hardlink_variant.equiv_obj = equiv_obj; + in->variant.hardlink_variant.equiv_id = equiv_obj->obj_id; + list_add(&in->hard_links, &equiv_obj->hard_links); + break; + case YAFFS_OBJECT_TYPE_FILE: + case YAFFS_OBJECT_TYPE_DIRECTORY: + case YAFFS_OBJECT_TYPE_SPECIAL: + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* do nothing */ + break; } - if (existingChunk == 0) { - in->nDataChunks++; + if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) { + /* Could not create the object header, fail */ + yaffs_del_obj(in); + in = NULL; } - yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND); + if (in) + yaffs_update_parent(parent); - return YAFFS_OK; + return in; } -static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode, - __u8 * buffer) +struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid) { - int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL); + return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, + uid, gid, NULL, NULL, 0); +} - if (chunkInNAND >= 0) { - return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND, - buffer,NULL); - } else { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not found zero instead" TENDSTR), - chunkInNAND)); - /* get sane (zero) data if you read a hole */ - memset(buffer, 0, in->myDev->nDataBytesPerChunk); - return 0; - } +struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name, + u32 mode, u32 uid, u32 gid) +{ + return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, + mode, uid, gid, NULL, NULL, 0); +} +struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid, u32 rdev) +{ + return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, + uid, gid, NULL, NULL, rdev); } -void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn) +struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid, const YCHAR *alias) { - int block; - int page; - yaffs_ExtendedTags tags; - yaffs_BlockInfo *bi; + return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, + uid, gid, NULL, alias, 0); +} - if (chunkId <= 0) - return; +/* yaffs_link_obj returns the object id of the equivalent object.*/ +struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name, + struct yaffs_obj *equiv_obj) +{ + /* Get the real object in case we were fed a hard link obj */ + equiv_obj = yaffs_get_equivalent_obj(equiv_obj); + if (yaffs_create_obj(YAFFS_OBJECT_TYPE_HARDLINK, + parent, name, 0, 0, 0, + equiv_obj, NULL, 0)) + return equiv_obj; - dev->nDeletions++; - block = chunkId / dev->nChunksPerBlock; - page = chunkId % dev->nChunksPerBlock; + return NULL; +} - if(!yaffs_CheckChunkBit(dev,block,page)) - T(YAFFS_TRACE_VERIFY, - (TSTR("Deleting invalid chunk %d"TENDSTR), - chunkId)); - bi = yaffs_GetBlockInfo(dev, block); - T(YAFFS_TRACE_DELETION, - (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId)); +/*---------------------- Block Management and Page Allocation -------------*/ - if (markNAND && - bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) { +static void yaffs_deinit_blocks(struct yaffs_dev *dev) +{ + if (dev->block_info_alt && dev->block_info) + vfree(dev->block_info); + else + kfree(dev->block_info); - yaffs_InitialiseTags(&tags); + dev->block_info_alt = 0; - tags.chunkDeleted = 1; + dev->block_info = NULL; - yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags); - yaffs_HandleUpdateChunk(dev, chunkId, &tags); - } else { - dev->nUnmarkedDeletions++; - } + if (dev->chunk_bits_alt && dev->chunk_bits) + vfree(dev->chunk_bits); + else + kfree(dev->chunk_bits); + dev->chunk_bits_alt = 0; + dev->chunk_bits = NULL; +} - /* Pull out of the management area. - * If the whole block became dirty, this will kick off an erasure. - */ - if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || - bi->blockState == YAFFS_BLOCK_STATE_FULL || - bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) { - dev->nFreeChunks++; +static int yaffs_init_blocks(struct yaffs_dev *dev) +{ + int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; - yaffs_ClearChunkBit(dev, block, page); + dev->block_info = NULL; + dev->chunk_bits = NULL; + dev->alloc_block = -1; /* force it to get a new one */ - bi->pagesInUse--; + /* If the first allocation strategy fails, thry the alternate one */ + dev->block_info = + kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS); + if (!dev->block_info) { + dev->block_info = + vmalloc(n_blocks * sizeof(struct yaffs_block_info)); + dev->block_info_alt = 1; + } else { + dev->block_info_alt = 0; + } - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING && - bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - yaffs_BlockBecameDirty(dev, block); - } + if (!dev->block_info) + goto alloc_error; + /* Set up dynamic blockinfo stuff. Round up bytes. */ + dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; + dev->chunk_bits = + kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS); + if (!dev->chunk_bits) { + dev->chunk_bits = + vmalloc(dev->chunk_bit_stride * n_blocks); + dev->chunk_bits_alt = 1; } else { - /* T(("Bad news deleting chunk %d\n",chunkId)); */ + dev->chunk_bits_alt = 0; } + if (!dev->chunk_bits) + goto alloc_error; -} - -static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode, - const __u8 * buffer, int nBytes, - int useReserve) -{ - /* Find old chunk Need to do this to get serial number - * Write new one and patch into tree. - * Invalidate old tags. - */ - int prevChunkId; - yaffs_ExtendedTags prevTags; + memset(dev->block_info, 0, n_blocks * sizeof(struct yaffs_block_info)); + memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks); + return YAFFS_OK; - int newChunkId; - yaffs_ExtendedTags newTags; +alloc_error: + yaffs_deinit_blocks(dev); + return YAFFS_FAIL; +} - yaffs_Device *dev = in->myDev; - yaffs_CheckGarbageCollection(dev); +void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no) +{ + struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no); + int erased_ok = 0; + int i; - /* Get the previous chunk at this location in the file if it exists */ - prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags); + /* If the block is still healthy erase it and mark as clean. + * If the block has had a data failure, then retire it. + */ - /* Set up new tags */ - yaffs_InitialiseTags(&newTags); + yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, + "yaffs_block_became_dirty block %d state %d %s", + block_no, bi->block_state, + (bi->needs_retiring) ? "needs retiring" : ""); - newTags.chunkId = chunkInInode; - newTags.objectId = in->objectId; - newTags.serialNumber = - (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1; - newTags.byteCount = nBytes; + yaffs2_clear_oldest_dirty_seq(dev, bi); - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - useReserve); + bi->block_state = YAFFS_BLOCK_STATE_DIRTY; - if (newChunkId >= 0) { - yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0); + /* If this is the block being garbage collected then stop gc'ing */ + if (block_no == dev->gc_block) + dev->gc_block = 0; - if (prevChunkId >= 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); + /* If this block is currently the best candidate for gc + * then drop as a candidate */ + if (block_no == dev->gc_dirtiest) { + dev->gc_dirtiest = 0; + dev->gc_pages_in_use = 0; + } + if (!bi->needs_retiring) { + yaffs2_checkpt_invalidate(dev); + erased_ok = yaffs_erase_block(dev, block_no); + if (!erased_ok) { + dev->n_erase_failures++; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Erasure failed %d", block_no); } - - yaffs_CheckFileSanity(in); } - return newChunkId; -} - -/* UpdateObjectHeader updates the header on NAND for an object. - * If name is not NULL, then that new name is used. - */ -int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force, - int isShrink, int shadows) -{ - - yaffs_BlockInfo *bi; - - yaffs_Device *dev = in->myDev; - - int prevChunkId; - int retVal = 0; - - int newChunkId; - yaffs_ExtendedTags newTags; - yaffs_ExtendedTags oldTags; - - __u8 *buffer = NULL; - YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1]; - - yaffs_ObjectHeader *oh = NULL; - - yaffs_strcpy(oldName,"silly old name"); + /* Verify erasure if needed */ + if (erased_ok && + ((yaffs_trace_mask & YAFFS_TRACE_ERASE) || + !yaffs_skip_verification(dev))) { + for (i = 0; i < dev->param.chunks_per_block; i++) { + if (!yaffs_check_chunk_erased(dev, + block_no * dev->param.chunks_per_block + i)) { + yaffs_trace(YAFFS_TRACE_ERROR, + ">>Block %d erasure supposedly OK, but chunk %d not erased", + block_no, i); + } + } + } - if (!in->fake || force) { + if (!erased_ok) { + /* We lost a block of free space */ + dev->n_free_chunks -= dev->param.chunks_per_block; + yaffs_retire_block(dev, block_no); + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Block %d retired", block_no); + return; + } - yaffs_CheckGarbageCollection(dev); - yaffs_CheckObjectDetailsLoaded(in); + /* Clean it up... */ + bi->block_state = YAFFS_BLOCK_STATE_EMPTY; + bi->seq_number = 0; + dev->n_erased_blocks++; + bi->pages_in_use = 0; + bi->soft_del_pages = 0; + bi->has_shrink_hdr = 0; + bi->skip_erased_check = 1; /* Clean, so no need to check */ + bi->gc_prioritise = 0; + bi->has_summary = 0; + + yaffs_clear_chunk_bits(dev, block_no); + + yaffs_trace(YAFFS_TRACE_ERASE, "Erased block %d", block_no); +} + +static inline int yaffs_gc_process_chunk(struct yaffs_dev *dev, + struct yaffs_block_info *bi, + int old_chunk, u8 *buffer) +{ + int new_chunk; + int mark_flash = 1; + struct yaffs_ext_tags tags; + struct yaffs_obj *object; + int matching_chunk; + int ret_val = YAFFS_OK; + + memset(&tags, 0, sizeof(tags)); + yaffs_rd_chunk_tags_nand(dev, old_chunk, + buffer, &tags); + object = yaffs_find_by_number(dev, tags.obj_id); + + yaffs_trace(YAFFS_TRACE_GC_DETAIL, + "Collecting chunk in block %d, %d %d %d ", + dev->gc_chunk, tags.obj_id, + tags.chunk_id, tags.n_bytes); + + if (object && !yaffs_skip_verification(dev)) { + if (tags.chunk_id == 0) + matching_chunk = + object->hdr_chunk; + else if (object->soft_del) + /* Defeat the test */ + matching_chunk = old_chunk; + else + matching_chunk = + yaffs_find_chunk_in_file + (object, tags.chunk_id, + NULL); + + if (old_chunk != matching_chunk) + yaffs_trace(YAFFS_TRACE_ERROR, + "gc: page in gc mismatch: %d %d %d %d", + old_chunk, + matching_chunk, + tags.obj_id, + tags.chunk_id); + } + + if (!object) { + yaffs_trace(YAFFS_TRACE_ERROR, + "page %d in gc has no object: %d %d %d ", + old_chunk, + tags.obj_id, tags.chunk_id, + tags.n_bytes); + } + + if (object && + object->deleted && + object->soft_del && tags.chunk_id != 0) { + /* Data chunk in a soft deleted file, + * throw it away. + * It's a soft deleted data chunk, + * No need to copy this, just forget + * about it and fix up the object. + */ - buffer = yaffs_GetTempBuffer(in->myDev, __LINE__); - oh = (yaffs_ObjectHeader *) buffer; + /* Free chunks already includes + * softdeleted chunks, how ever this + * chunk is going to soon be really + * deleted which will increment free + * chunks. We have to decrement free + * chunks so this works out properly. + */ + dev->n_free_chunks--; + bi->soft_del_pages--; + + object->n_data_chunks--; + if (object->n_data_chunks <= 0) { + /* remeber to clean up obj */ + dev->gc_cleanup_list[dev->n_clean_ups] = tags.obj_id; + dev->n_clean_ups++; + } + mark_flash = 0; + } else if (object) { + /* It's either a data chunk in a live + * file or an ObjectHeader, so we're + * interested in it. + * NB Need to keep the ObjectHeaders of + * deleted files until the whole file + * has been deleted off + */ + tags.serial_number++; + dev->n_gc_copies++; + + if (tags.chunk_id == 0) { + /* It is an object Id, + * We need to nuke the + * shrinkheader flags since its + * work is done. + * Also need to clean up + * shadowing. + */ + struct yaffs_obj_hdr *oh; + oh = (struct yaffs_obj_hdr *) buffer; + + oh->is_shrink = 0; + tags.extra_is_shrink = 0; + oh->shadows_obj = 0; + oh->inband_shadowed_obj_id = 0; + tags.extra_shadows = 0; + + /* Update file size */ + if (object->variant_type == YAFFS_OBJECT_TYPE_FILE) { + yaffs_oh_size_load(oh, + object->variant.file_variant.file_size); + tags.extra_file_size = + object->variant.file_variant.file_size; + } - prevChunkId = in->chunkId; + yaffs_verify_oh(object, oh, &tags, 1); + new_chunk = + yaffs_write_new_chunk(dev, (u8 *) oh, &tags, 1); + } else { + new_chunk = + yaffs_write_new_chunk(dev, buffer, &tags, 1); + } - if (prevChunkId >= 0) { - yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId, - buffer, &oldTags); + if (new_chunk < 0) { + ret_val = YAFFS_FAIL; + } else { - yaffs_VerifyObjectHeader(in,oh,&oldTags,0); + /* Now fix up the Tnodes etc. */ - memcpy(oldName, oh->name, sizeof(oh->name)); + if (tags.chunk_id == 0) { + /* It's a header */ + object->hdr_chunk = new_chunk; + object->serial = tags.serial_number; + } else { + /* It's a data chunk */ + yaffs_put_chunk_in_file(object, tags.chunk_id, + new_chunk, 0); + } } + } + if (ret_val == YAFFS_OK) + yaffs_chunk_del(dev, old_chunk, mark_flash, __LINE__); + return ret_val; +} - memset(buffer, 0xFF, dev->nDataBytesPerChunk); +static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block) +{ + int old_chunk; + int ret_val = YAFFS_OK; + int i; + int is_checkpt_block; + int max_copies; + int chunks_before = yaffs_get_erased_chunks(dev); + int chunks_after; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, block); - oh->type = in->variantType; - oh->yst_mode = in->yst_mode; - oh->shadowsObject = shadows; + is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); -#ifdef CONFIG_YAFFS_WINCE - oh->win_atime[0] = in->win_atime[0]; - oh->win_ctime[0] = in->win_ctime[0]; - oh->win_mtime[0] = in->win_mtime[0]; - oh->win_atime[1] = in->win_atime[1]; - oh->win_ctime[1] = in->win_ctime[1]; - oh->win_mtime[1] = in->win_mtime[1]; -#else - oh->yst_uid = in->yst_uid; - oh->yst_gid = in->yst_gid; - oh->yst_atime = in->yst_atime; - oh->yst_mtime = in->yst_mtime; - oh->yst_ctime = in->yst_ctime; - oh->yst_rdev = in->yst_rdev; -#endif - if (in->parent) { - oh->parentObjectId = in->parent->objectId; - } else { - oh->parentObjectId = 0; - } - - if (name && *name) { - memset(oh->name, 0, sizeof(oh->name)); - yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); - } else if (prevChunkId>=0) { - memcpy(oh->name, oldName, sizeof(oh->name)); - } else { - memset(oh->name, 0, sizeof(oh->name)); - } + yaffs_trace(YAFFS_TRACE_TRACING, + "Collecting block %d, in use %d, shrink %d, whole_block %d", + block, bi->pages_in_use, bi->has_shrink_hdr, + whole_block); - oh->isShrink = isShrink; + /*yaffs_verify_free_chunks(dev); */ - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Should not happen */ - break; - case YAFFS_OBJECT_TYPE_FILE: - oh->fileSize = - (oh->parentObjectId == YAFFS_OBJECTID_DELETED - || oh->parentObjectId == - YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant. - fileVariant.fileSize; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - oh->equivalentObjectId = - in->variant.hardLinkVariant.equivalentObjectId; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_strncpy(oh->alias, - in->variant.symLinkVariant.alias, - YAFFS_MAX_ALIAS_LENGTH); - oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; - break; - } + if (bi->block_state == YAFFS_BLOCK_STATE_FULL) + bi->block_state = YAFFS_BLOCK_STATE_COLLECTING; - /* Tags */ - yaffs_InitialiseTags(&newTags); - in->serial++; - newTags.chunkId = 0; - newTags.objectId = in->objectId; - newTags.serialNumber = in->serial; + bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */ - /* Add extra info for file header */ + dev->gc_disable = 1; - newTags.extraHeaderInfoAvailable = 1; - newTags.extraParentObjectId = oh->parentObjectId; - newTags.extraFileLength = oh->fileSize; - newTags.extraIsShrinkHeader = oh->isShrink; - newTags.extraEquivalentObjectId = oh->equivalentObjectId; - newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0; - newTags.extraObjectType = in->variantType; + yaffs_summary_gc(dev, block); - yaffs_VerifyObjectHeader(in,oh,&newTags,1); + if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) { + yaffs_trace(YAFFS_TRACE_TRACING, + "Collecting block %d that has no chunks in use", + block); + yaffs_block_became_dirty(dev, block); + } else { - /* Create new chunk in NAND */ - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - (prevChunkId >= 0) ? 1 : 0); + u8 *buffer = yaffs_get_temp_buffer(dev); - if (newChunkId >= 0) { + yaffs_verify_blk(dev, bi, block); - in->chunkId = newChunkId; + max_copies = (whole_block) ? dev->param.chunks_per_block : 5; + old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk; - if (prevChunkId >= 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, - __LINE__); + for (/* init already done */ ; + ret_val == YAFFS_OK && + dev->gc_chunk < dev->param.chunks_per_block && + (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) && + max_copies > 0; + dev->gc_chunk++, old_chunk++) { + if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) { + /* Page is in use and might need to be copied */ + max_copies--; + ret_val = yaffs_gc_process_chunk(dev, bi, + old_chunk, buffer); } + } + yaffs_release_temp_buffer(dev, buffer); + } - if(!yaffs_ObjectHasCachedWriteData(in)) - in->dirty = 0; + yaffs_verify_collected_blk(dev, bi, block); - /* If this was a shrink, then mark the block that the chunk lives on */ - if (isShrink) { - bi = yaffs_GetBlockInfo(in->myDev, - newChunkId /in->myDev-> nChunksPerBlock); - bi->hasShrinkHeader = 1; + if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { + /* + * The gc did not complete. Set block state back to FULL + * because checkpointing does not restore gc. + */ + bi->block_state = YAFFS_BLOCK_STATE_FULL; + } else { + /* The gc completed. */ + /* Do any required cleanups */ + for (i = 0; i < dev->n_clean_ups; i++) { + /* Time to delete the file too */ + struct yaffs_obj *object = + yaffs_find_by_number(dev, dev->gc_cleanup_list[i]); + if (object) { + yaffs_free_tnode(dev, + object->variant.file_variant.top); + object->variant.file_variant.top = NULL; + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: About to finally delete object %d", + object->obj_id); + yaffs_generic_obj_del(object); + object->my_dev->n_deleted_files--; } } - - retVal = newChunkId; - + chunks_after = yaffs_get_erased_chunks(dev); + if (chunks_before >= chunks_after) + yaffs_trace(YAFFS_TRACE_GC, + "gc did not increase free chunks before %d after %d", + chunks_before, chunks_after); + dev->gc_block = 0; + dev->gc_chunk = 0; + dev->n_clean_ups = 0; } - if (buffer) - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); + dev->gc_disable = 0; - return retVal; + return ret_val; } -/*------------------------ Short Operations Cache ---------------------------------------- - * In many situations where there is no high level buffering (eg WinCE) a lot of - * reads might be short sequential reads, and a lot of writes may be short - * sequential writes. eg. scanning/writing a jpeg file. - * In these cases, a short read/write cache can provide a huge perfomance benefit - * with dumb-as-a-rock code. - * In Linux, the page cache provides read buffering aand the short op cache provides write - * buffering. - * - * There are a limited number (~10) of cache chunks per device so that we don't - * need a very intelligent search. +/* + * find_gc_block() selects the dirtiest block (or close enough) + * for garbage collection. */ -static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj) +static unsigned yaffs_find_gc_block(struct yaffs_dev *dev, + int aggressive, int background) { - yaffs_Device *dev = obj->myDev; int i; - yaffs_ChunkCache *cache; - int nCaches = obj->myDev->nShortOpCaches; - - for(i = 0; i < nCaches; i++){ - cache = &dev->srCache[i]; - if (cache->object == obj && - cache->dirty) - return 1; - } - - return 0; -} - + int iterations; + unsigned selected = 0; + int prioritised = 0; + int prioritised_exist = 0; + struct yaffs_block_info *bi; + int threshold; -static void yaffs_FlushFilesChunkCache(yaffs_Object * obj) -{ - yaffs_Device *dev = obj->myDev; - int lowest = -99; /* Stop compiler whining. */ - int i; - yaffs_ChunkCache *cache; - int chunkWritten = 0; - int nCaches = obj->myDev->nShortOpCaches; - - if (nCaches > 0) { - do { - cache = NULL; - - /* Find the dirty cache for this object with the lowest chunk id. */ - for (i = 0; i < nCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].dirty) { - if (!cache - || dev->srCache[i].chunkId < - lowest) { - cache = &dev->srCache[i]; - lowest = cache->chunkId; - } + /* First let's see if we need to grab a prioritised block */ + if (dev->has_pending_prioritised_gc && !aggressive) { + dev->gc_dirtiest = 0; + bi = dev->block_info; + for (i = dev->internal_start_block; + i <= dev->internal_end_block && !selected; i++) { + + if (bi->gc_prioritise) { + prioritised_exist = 1; + if (bi->block_state == YAFFS_BLOCK_STATE_FULL && + yaffs_block_ok_for_gc(dev, bi)) { + selected = i; + prioritised = 1; } } - - if (cache && !cache->locked) { - /* Write it out and free it up */ - - chunkWritten = - yaffs_WriteChunkDataToObject(cache->object, - cache->chunkId, - cache->data, - cache->nBytes, - 1); - cache->dirty = 0; - cache->object = NULL; - } - - } while (cache && chunkWritten > 0); - - if (cache) { - /* Hoosterman, disk full while writing cache out. */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); - + bi++; } - } -} + /* + * If there is a prioritised block and none was selected then + * this happened because there is at least one old dirty block + * gumming up the works. Let's gc the oldest dirty block. + */ -/*yaffs_FlushEntireDeviceCache(dev) - * - * - */ + if (prioritised_exist && + !selected && dev->oldest_dirty_block > 0) + selected = dev->oldest_dirty_block; -void yaffs_FlushEntireDeviceCache(yaffs_Device *dev) -{ - yaffs_Object *obj; - int nCaches = dev->nShortOpCaches; - int i; + if (!prioritised_exist) /* None found, so we can clear this */ + dev->has_pending_prioritised_gc = 0; + } - /* Find a dirty object in the cache and flush it... - * until there are no further dirty objects. + /* If we're doing aggressive GC then we are happy to take a less-dirty + * block, and search harder. + * else (leasurely gc), then we only bother to do this if the + * block has only a few pages in use. */ - do { - obj = NULL; - for( i = 0; i < nCaches && !obj; i++) { - if (dev->srCache[i].object && - dev->srCache[i].dirty) - obj = dev->srCache[i].object; - } - if(obj) - yaffs_FlushFilesChunkCache(obj); + if (!selected) { + int pages_used; + int n_blocks = + dev->internal_end_block - dev->internal_start_block + 1; + if (aggressive) { + threshold = dev->param.chunks_per_block; + iterations = n_blocks; + } else { + int max_threshold; - } while(obj); + if (background) + max_threshold = dev->param.chunks_per_block / 2; + else + max_threshold = dev->param.chunks_per_block / 8; -} + if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD) + max_threshold = YAFFS_GC_PASSIVE_THRESHOLD; + threshold = background ? (dev->gc_not_done + 2) * 2 : 0; + if (threshold < YAFFS_GC_PASSIVE_THRESHOLD) + threshold = YAFFS_GC_PASSIVE_THRESHOLD; + if (threshold > max_threshold) + threshold = max_threshold; -/* Grab us a cache chunk for use. - * First look for an empty one. - * Then look for the least recently used non-dirty one. - * Then look for the least recently used dirty one...., flush and look again. - */ -static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device * dev) -{ - int i; - int usage; - int theOne; + iterations = n_blocks / 16 + 1; + if (iterations > 100) + iterations = 100; + } - if (dev->nShortOpCaches > 0) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if (!dev->srCache[i].object) - return &dev->srCache[i]; + for (i = 0; + i < iterations && + (dev->gc_dirtiest < 1 || + dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH); + i++) { + dev->gc_block_finder++; + if (dev->gc_block_finder < dev->internal_start_block || + dev->gc_block_finder > dev->internal_end_block) + dev->gc_block_finder = + dev->internal_start_block; + + bi = yaffs_get_block_info(dev, dev->gc_block_finder); + + pages_used = bi->pages_in_use - bi->soft_del_pages; + + if (bi->block_state == YAFFS_BLOCK_STATE_FULL && + pages_used < dev->param.chunks_per_block && + (dev->gc_dirtiest < 1 || + pages_used < dev->gc_pages_in_use) && + yaffs_block_ok_for_gc(dev, bi)) { + dev->gc_dirtiest = dev->gc_block_finder; + dev->gc_pages_in_use = pages_used; + } } - return NULL; + if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold) + selected = dev->gc_dirtiest; + } - theOne = -1; - usage = 0; /* just to stop the compiler grizzling */ + /* + * If nothing has been selected for a while, try the oldest dirty + * because that's gumming up the works. + */ - for (i = 0; i < dev->nShortOpCaches; i++) { - if (!dev->srCache[i].dirty && - ((dev->srCache[i].lastUse < usage && theOne >= 0) || - theOne < 0)) { - usage = dev->srCache[i].lastUse; - theOne = i; - } + if (!selected && dev->param.is_yaffs2 && + dev->gc_not_done >= (background ? 10 : 20)) { + yaffs2_find_oldest_dirty_seq(dev); + if (dev->oldest_dirty_block > 0) { + selected = dev->oldest_dirty_block; + dev->gc_dirtiest = selected; + dev->oldest_dirty_gc_count++; + bi = yaffs_get_block_info(dev, selected); + dev->gc_pages_in_use = + bi->pages_in_use - bi->soft_del_pages; + } else { + dev->gc_not_done = 0; } + } + + if (selected) { + yaffs_trace(YAFFS_TRACE_GC, + "GC Selected block %d with %d free, prioritised:%d", + selected, + dev->param.chunks_per_block - dev->gc_pages_in_use, + prioritised); + dev->n_gc_blocks++; + if (background) + dev->bg_gcs++; - return theOne >= 0 ? &dev->srCache[theOne] : NULL; + dev->gc_dirtiest = 0; + dev->gc_pages_in_use = 0; + dev->gc_not_done = 0; + if (dev->refresh_skip > 0) + dev->refresh_skip--; } else { - return NULL; + dev->gc_not_done++; + yaffs_trace(YAFFS_TRACE_GC, + "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s", + dev->gc_block_finder, dev->gc_not_done, threshold, + dev->gc_dirtiest, dev->gc_pages_in_use, + dev->oldest_dirty_block, background ? " bg" : ""); } + return selected; } -static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev) +/* New garbage collector + * If we're very low on erased blocks then we do aggressive garbage collection + * otherwise we do "leasurely" garbage collection. + * Aggressive gc looks further (whole array) and will accept less dirty blocks. + * Passive gc only inspects smaller areas and only accepts more dirty blocks. + * + * The idea is to help clear out space in a more spread-out manner. + * Dunno if it really does anything useful. + */ +static int yaffs_check_gc(struct yaffs_dev *dev, int background) { - yaffs_ChunkCache *cache; - yaffs_Object *theObj; - int usage; - int i; + int aggressive = 0; + int gc_ok = YAFFS_OK; + int max_tries = 0; + int min_erased; + int erased_chunks; + int checkpt_block_adjust; - if (dev->nShortOpCaches > 0) { - /* Try find a non-dirty one... */ + if (dev->param.gc_control && (dev->param.gc_control(dev) & 1) == 0) + return YAFFS_OK; - cache = yaffs_GrabChunkCacheWorker(dev); + if (dev->gc_disable) + /* Bail out so we don't get recursive gc */ + return YAFFS_OK; - if (!cache) { - /* They were all dirty, find the last recently used object and flush - * its cache, then find again. - * NB what's here is not very accurate, we actually flush the object - * the last recently used page. - */ + /* This loop should pass the first time. + * Only loops here if the collection does not increase space. + */ - /* With locking we can't assume we can use entry zero */ + do { + max_tries++; - theObj = NULL; - usage = -1; - cache = NULL; + checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev); - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object && - !dev->srCache[i].locked && - (dev->srCache[i].lastUse < usage || !cache)) - { - usage = dev->srCache[i].lastUse; - theObj = dev->srCache[i].object; - cache = &dev->srCache[i]; - } - } + min_erased = + dev->param.n_reserved_blocks + checkpt_block_adjust + 1; + erased_chunks = + dev->n_erased_blocks * dev->param.chunks_per_block; - if (!cache || cache->dirty) { - /* Flush and try again */ - yaffs_FlushFilesChunkCache(theObj); - cache = yaffs_GrabChunkCacheWorker(dev); + /* If we need a block soon then do aggressive gc. */ + if (dev->n_erased_blocks < min_erased) + aggressive = 1; + else { + if (!background + && erased_chunks > (dev->n_free_chunks / 4)) + break; + + if (dev->gc_skip > 20) + dev->gc_skip = 20; + if (erased_chunks < dev->n_free_chunks / 2 || + dev->gc_skip < 1 || background) + aggressive = 0; + else { + dev->gc_skip--; + break; } - } - return cache; - } else - return NULL; -} + dev->gc_skip = 5; -/* Find a cached chunk */ -static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj, - int chunkId) -{ - yaffs_Device *dev = obj->myDev; - int i; - if (dev->nShortOpCaches > 0) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].chunkId == chunkId) { - dev->cacheHits++; + /* If we don't already have a block being gc'd then see if we + * should start another */ - return &dev->srCache[i]; - } + if (dev->gc_block < 1 && !aggressive) { + dev->gc_block = yaffs2_find_refresh_block(dev); + dev->gc_chunk = 0; + dev->n_clean_ups = 0; } - } - return NULL; -} - -/* Mark the chunk for the least recently used algorithym */ -static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache, - int isAWrite) -{ - - if (dev->nShortOpCaches > 0) { - if (dev->srLastUse < 0 || dev->srLastUse > 100000000) { - /* Reset the cache usages */ - int i; - for (i = 1; i < dev->nShortOpCaches; i++) { - dev->srCache[i].lastUse = 0; - } - dev->srLastUse = 0; + if (dev->gc_block < 1) { + dev->gc_block = + yaffs_find_gc_block(dev, aggressive, background); + dev->gc_chunk = 0; + dev->n_clean_ups = 0; } - dev->srLastUse++; + if (dev->gc_block > 0) { + dev->all_gcs++; + if (!aggressive) + dev->passive_gc_count++; - cache->lastUse = dev->srLastUse; + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: GC n_erased_blocks %d aggressive %d", + dev->n_erased_blocks, aggressive); - if (isAWrite) { - cache->dirty = 1; + gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive); } - } -} - -/* Invalidate a single cache page. - * Do this when a whole page gets written, - * ie the short cache for this page is no longer valid. - */ -static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId) -{ - if (object->myDev->nShortOpCaches > 0) { - yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId); - if (cache) { - cache->object = NULL; + if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) && + dev->gc_block > 0) { + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d", + dev->n_erased_blocks, max_tries, + dev->gc_block); } - } -} + } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) && + (dev->gc_block > 0) && (max_tries < 2)); -/* Invalidate all the cache pages associated with this object - * Do this whenever ther file is deleted or resized. - */ -static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in) -{ - int i; - yaffs_Device *dev = in->myDev; - - if (dev->nShortOpCaches > 0) { - /* Invalidate it. */ - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object == in) { - dev->srCache[i].object = NULL; - } - } - } + return aggressive ? gc_ok : YAFFS_OK; } -/*--------------------- Checkpointing --------------------*/ - - -static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head) +/* + * yaffs_bg_gc() + * Garbage collects. Intended to be called from a background thread. + * Returns non-zero if at least half the free chunks are erased. + */ +int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency) { - yaffs_CheckpointValidity cp; + int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; - memset(&cp,0,sizeof(cp)); + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency); - cp.structType = sizeof(cp); - cp.magic = YAFFS_MAGIC; - cp.version = YAFFS_CHECKPOINT_VERSION; - cp.head = (head) ? 1 : 0; - - return (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp))? - 1 : 0; + yaffs_check_gc(dev, 1); + return erased_chunks > dev->n_free_chunks / 2; } -static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head) -{ - yaffs_CheckpointValidity cp; - int ok; - - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - - if(ok) - ok = (cp.structType == sizeof(cp)) && - (cp.magic == YAFFS_MAGIC) && - (cp.version == YAFFS_CHECKPOINT_VERSION) && - (cp.head == ((head) ? 1 : 0)); - return ok ? 1 : 0; -} +/*-------------------- Data file manipulation -----------------*/ -static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp, - yaffs_Device *dev) +static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer) { - cp->nErasedBlocks = dev->nErasedBlocks; - cp->allocationBlock = dev->allocationBlock; - cp->allocationPage = dev->allocationPage; - cp->nFreeChunks = dev->nFreeChunks; + int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL); - cp->nDeletedFiles = dev->nDeletedFiles; - cp->nUnlinkedFiles = dev->nUnlinkedFiles; - cp->nBackgroundDeletions = dev->nBackgroundDeletions; - cp->sequenceNumber = dev->sequenceNumber; - cp->oldestDirtySequence = dev->oldestDirtySequence; + if (nand_chunk >= 0) + return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk, + buffer, NULL); + else { + yaffs_trace(YAFFS_TRACE_NANDACCESS, + "Chunk %d not found zero instead", + nand_chunk); + /* get sane (zero) data if you read a hole */ + memset(buffer, 0, in->my_dev->data_bytes_per_chunk); + return 0; + } } -static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev, - yaffs_CheckpointDevice *cp) +void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, + int lyn) { - dev->nErasedBlocks = cp->nErasedBlocks; - dev->allocationBlock = cp->allocationBlock; - dev->allocationPage = cp->allocationPage; - dev->nFreeChunks = cp->nFreeChunks; + int block; + int page; + struct yaffs_ext_tags tags; + struct yaffs_block_info *bi; - dev->nDeletedFiles = cp->nDeletedFiles; - dev->nUnlinkedFiles = cp->nUnlinkedFiles; - dev->nBackgroundDeletions = cp->nBackgroundDeletions; - dev->sequenceNumber = cp->sequenceNumber; - dev->oldestDirtySequence = cp->oldestDirtySequence; -} + if (chunk_id <= 0) + return; + dev->n_deletions++; + block = chunk_id / dev->param.chunks_per_block; + page = chunk_id % dev->param.chunks_per_block; -static int yaffs_WriteCheckpointDevice(yaffs_Device *dev) -{ - yaffs_CheckpointDevice cp; - __u32 nBytes; - __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); + if (!yaffs_check_chunk_bit(dev, block, page)) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Deleting invalid chunk %d", chunk_id); - int ok; + bi = yaffs_get_block_info(dev, block); - /* Write device runtime values*/ - yaffs_DeviceToCheckpointDevice(&cp,dev); - cp.structType = sizeof(cp); + yaffs2_update_oldest_dirty_seq(dev, block, bi); - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); + yaffs_trace(YAFFS_TRACE_DELETION, + "line %d delete of chunk %d", + lyn, chunk_id); - /* Write block info */ - if(ok) { - nBytes = nBlocks * sizeof(yaffs_BlockInfo); - ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes); - } + if (!dev->param.is_yaffs2 && mark_flash && + bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) { - /* Write chunk bits */ - if(ok) { - nBytes = nBlocks * dev->chunkBitmapStride; - ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes); + memset(&tags, 0, sizeof(tags)); + tags.is_deleted = 1; + yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags); + yaffs_handle_chunk_update(dev, chunk_id, &tags); + } else { + dev->n_unmarked_deletions++; } - return ok ? 1 : 0; + /* Pull out of the management area. + * If the whole block became dirty, this will kick off an erasure. + */ + if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING || + bi->block_state == YAFFS_BLOCK_STATE_FULL || + bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN || + bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { + dev->n_free_chunks++; + yaffs_clear_chunk_bit(dev, block, page); + bi->pages_in_use--; + + if (bi->pages_in_use == 0 && + !bi->has_shrink_hdr && + bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING && + bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCAN) { + yaffs_block_became_dirty(dev, block); + } + } } -static int yaffs_ReadCheckpointDevice(yaffs_Device *dev) +static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, + const u8 *buffer, int n_bytes, int use_reserve) { - yaffs_CheckpointDevice cp; - __u32 nBytes; - __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); + /* Find old chunk Need to do this to get serial number + * Write new one and patch into tree. + * Invalidate old tags. + */ - int ok; + int prev_chunk_id; + struct yaffs_ext_tags prev_tags; + int new_chunk_id; + struct yaffs_ext_tags new_tags; + struct yaffs_dev *dev = in->my_dev; - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - if(!ok) - return 0; + yaffs_check_gc(dev, 0); - if(cp.structType != sizeof(cp)) + /* Get the previous chunk at this location in the file if it exists. + * If it does not exist then put a zero into the tree. This creates + * the tnode now, rather than later when it is harder to clean up. + */ + prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags); + if (prev_chunk_id < 1 && + !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0)) return 0; + /* Set up new tags */ + memset(&new_tags, 0, sizeof(new_tags)); - yaffs_CheckpointDeviceToDevice(dev,&cp); + new_tags.chunk_id = inode_chunk; + new_tags.obj_id = in->obj_id; + new_tags.serial_number = + (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1; + new_tags.n_bytes = n_bytes; - nBytes = nBlocks * sizeof(yaffs_BlockInfo); + if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Writing %d bytes to chunk!!!!!!!!!", + n_bytes); + BUG(); + } - ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes); + new_chunk_id = + yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve); - if(!ok) - return 0; - nBytes = nBlocks * dev->chunkBitmapStride; + if (new_chunk_id > 0) { + yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0); - ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes); + if (prev_chunk_id > 0) + yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); - return ok ? 1 : 0; -} + yaffs_verify_file_sane(in); + } + return new_chunk_id; -static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp, - yaffs_Object *obj) -{ +} - cp->objectId = obj->objectId; - cp->parentId = (obj->parent) ? obj->parent->objectId : 0; - cp->chunkId = obj->chunkId; - cp->variantType = obj->variantType; - cp->deleted = obj->deleted; - cp->softDeleted = obj->softDeleted; - cp->unlinked = obj->unlinked; - cp->fake = obj->fake; - cp->renameAllowed = obj->renameAllowed; - cp->unlinkAllowed = obj->unlinkAllowed; - cp->serial = obj->serial; - cp->nDataChunks = obj->nDataChunks; - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize; - else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) - cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId; -} -static void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp) +static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set, + const YCHAR *name, const void *value, int size, + int flags) { + struct yaffs_xattr_mod xmod; + int result; - yaffs_Object *parent; + xmod.set = set; + xmod.name = name; + xmod.data = value; + xmod.size = size; + xmod.flags = flags; + xmod.result = -ENOSPC; - obj->objectId = cp->objectId; + result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); - if(cp->parentId) - parent = yaffs_FindOrCreateObjectByNumber( - obj->myDev, - cp->parentId, - YAFFS_OBJECT_TYPE_DIRECTORY); + if (result > 0) + return xmod.result; else - parent = NULL; - - if(parent) - yaffs_AddObjectToDirectory(parent, obj); - - obj->chunkId = cp->chunkId; - obj->variantType = cp->variantType; - obj->deleted = cp->deleted; - obj->softDeleted = cp->softDeleted; - obj->unlinked = cp->unlinked; - obj->fake = cp->fake; - obj->renameAllowed = cp->renameAllowed; - obj->unlinkAllowed = cp->unlinkAllowed; - obj->serial = cp->serial; - obj->nDataChunks = cp->nDataChunks; - - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId; - else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) - obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId; - - if(obj->objectId >= YAFFS_NOBJECT_BUCKETS) - obj->lazyLoaded = 1; + return -ENOSPC; } - - -static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn, - __u32 level, int chunkOffset) +static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer, + struct yaffs_xattr_mod *xmod) { - int i; - yaffs_Device *dev = in->myDev; - int ok = 1; - int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - - if (tn) { - if (level > 0) { - - for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){ - if (tn->internal[i]) { - ok = yaffs_CheckpointTnodeWorker(in, - tn->internal[i], - level - 1, - (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); - } - } - } else if (level == 0) { - __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS; - /* printf("write tnode at %d\n",baseOffset); */ - ok = (yaffs_CheckpointWrite(dev,&baseOffset,sizeof(baseOffset)) == sizeof(baseOffset)); - if(ok) - ok = (yaffs_CheckpointWrite(dev,tn,nTnodeBytes) == nTnodeBytes); - } - } + int retval = 0; + int x_offs = sizeof(struct yaffs_obj_hdr); + struct yaffs_dev *dev = obj->my_dev; + int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); + char *x_buffer = buffer + x_offs; - return ok; + if (xmod->set) + retval = + nval_set(x_buffer, x_size, xmod->name, xmod->data, + xmod->size, xmod->flags); + else + retval = nval_del(x_buffer, x_size, xmod->name); -} + obj->has_xattr = nval_hasvalues(x_buffer, x_size); + obj->xattr_known = 1; + xmod->result = retval; -static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj) -{ - __u32 endMarker = ~0; - int ok = 1; - - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE){ - ok = yaffs_CheckpointTnodeWorker(obj, - obj->variant.fileVariant.top, - obj->variant.fileVariant.topLevel, - 0); - if(ok) - ok = (yaffs_CheckpointWrite(obj->myDev,&endMarker,sizeof(endMarker)) == - sizeof(endMarker)); - } - - return ok ? 1 : 0; + return retval; } -static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj) +static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR *name, + void *value, int size) { - __u32 baseChunk; - int ok = 1; - yaffs_Device *dev = obj->myDev; - yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant; - yaffs_Tnode *tn; - int nread = 0; + char *buffer = NULL; + int result; + struct yaffs_ext_tags tags; + struct yaffs_dev *dev = obj->my_dev; + int x_offs = sizeof(struct yaffs_obj_hdr); + int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); + char *x_buffer; + int retval = 0; - ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); + if (obj->hdr_chunk < 1) + return -ENODATA; - while(ok && (~baseChunk)){ - nread++; - /* Read level 0 tnode */ + /* If we know that the object has no xattribs then don't do all the + * reading and parsing. + */ + if (obj->xattr_known && !obj->has_xattr) { + if (name) + return -ENODATA; + else + return 0; + } + buffer = (char *)yaffs_get_temp_buffer(dev); + if (!buffer) + return -ENOMEM; - /* printf("read tnode at %d\n",baseChunk); */ - tn = yaffs_GetTnodeRaw(dev); - if(tn) - ok = (yaffs_CheckpointRead(dev,tn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8) == - (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); - else - ok = 0; + result = + yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags); - if(tn && ok){ - ok = yaffs_AddOrFindLevel0Tnode(dev, - fileStructPtr, - baseChunk, - tn) ? 1 : 0; + if (result != YAFFS_OK) + retval = -ENOENT; + else { + x_buffer = buffer + x_offs; + if (!obj->xattr_known) { + obj->has_xattr = nval_hasvalues(x_buffer, x_size); + obj->xattr_known = 1; } - if(ok) - ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); - + if (name) + retval = nval_get(x_buffer, x_size, name, value, size); + else + retval = nval_list(x_buffer, x_size, value, size); } - - T(YAFFS_TRACE_CHECKPOINT,( - TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR), - nread,baseChunk,ok)); - - return ok ? 1 : 0; + yaffs_release_temp_buffer(dev, (u8 *) buffer); + return retval; } - -static int yaffs_WriteCheckpointObjects(yaffs_Device *dev) +int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, + const void *value, int size, int flags) { - yaffs_Object *obj; - yaffs_CheckpointObject cp; - int i; - int ok = 1; - struct list_head *lh; - - - /* Iterate through the objects in each hash entry, - * dumping them to the checkpointing stream. - */ - - for(i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++){ - list_for_each(lh, &dev->objectBucket[i].list) { - if (lh) { - obj = list_entry(lh, yaffs_Object, hashLink); - if (!obj->deferedFree) { - yaffs_ObjectToCheckpointObject(&cp,obj); - cp.structType = sizeof(cp); - - T(YAFFS_TRACE_CHECKPOINT,( - TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR), - cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj)); - - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); - - if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){ - ok = yaffs_WriteCheckpointTnodes(obj); - } - } - } - } - } - - /* Dump end of list */ - memset(&cp,0xFF,sizeof(yaffs_CheckpointObject)); - cp.structType = sizeof(cp); - - if(ok) - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); - - return ok ? 1 : 0; + return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); } -static int yaffs_ReadCheckpointObjects(yaffs_Device *dev) +int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name) { - yaffs_Object *obj; - yaffs_CheckpointObject cp; - int ok = 1; - int done = 0; - yaffs_Object *hardList = NULL; - - while(ok && !done) { - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - if(cp.structType != sizeof(cp)) { - T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR), - cp.structType,sizeof(cp),ok)); - ok = 0; - } - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR), - cp.objectId,cp.parentId,cp.variantType,cp.chunkId)); - - if(ok && cp.objectId == ~0) - done = 1; - else if(ok){ - obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType); - if(obj) { - yaffs_CheckpointObjectToObject(obj,&cp); - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) { - ok = yaffs_ReadCheckpointTnodes(obj); - } else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - obj->hardLinks.next = - (struct list_head *) - hardList; - hardList = obj; - } - - } - } - } - - if(ok) - yaffs_HardlinkFixup(dev,hardList); - - return ok ? 1 : 0; + return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); } -static int yaffs_WriteCheckpointSum(yaffs_Device *dev) +int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, + int size) { - __u32 checkpointSum; - int ok; - - yaffs_GetCheckpointSum(dev,&checkpointSum); - - ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum)); - - if(!ok) - return 0; - - return 1; + return yaffs_do_xattrib_fetch(obj, name, value, size); } -static int yaffs_ReadCheckpointSum(yaffs_Device *dev) +int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size) { - __u32 checkpointSum0; - __u32 checkpointSum1; - int ok; - - yaffs_GetCheckpointSum(dev,&checkpointSum0); - - ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1)); + return yaffs_do_xattrib_fetch(obj, NULL, buffer, size); +} - if(!ok) - return 0; +static void yaffs_check_obj_details_loaded(struct yaffs_obj *in) +{ + u8 *buf; + struct yaffs_obj_hdr *oh; + struct yaffs_dev *dev; + struct yaffs_ext_tags tags; + int result; + int alloc_failed = 0; - if(checkpointSum0 != checkpointSum1) - return 0; + if (!in || !in->lazy_loaded || in->hdr_chunk < 1) + return; - return 1; + dev = in->my_dev; + in->lazy_loaded = 0; + buf = yaffs_get_temp_buffer(dev); + + result = yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, buf, &tags); + oh = (struct yaffs_obj_hdr *)buf; + + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + yaffs_set_obj_name_from_oh(in, oh); + + if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { + in->variant.symlink_variant.alias = + yaffs_clone_str(oh->alias); + if (!in->variant.symlink_variant.alias) + alloc_failed = 1; /* Not returned */ + } + yaffs_release_temp_buffer(dev, buf); +} + +static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR *name, + const YCHAR *oh_name, int buff_size) +{ +#ifdef CONFIG_YAFFS_AUTO_UNICODE + if (dev->param.auto_unicode) { + if (*oh_name) { + /* It is an ASCII name, do an ASCII to + * unicode conversion */ + const char *ascii_oh_name = (const char *)oh_name; + int n = buff_size - 1; + while (n > 0 && *ascii_oh_name) { + *name = *ascii_oh_name; + name++; + ascii_oh_name++; + n--; + } + } else { + yaffs_strncpy(name, oh_name + 1, buff_size - 1); + } + } else { +#else + dev = dev; + { +#endif + yaffs_strncpy(name, oh_name, buff_size - 1); + } } - -static int yaffs_WriteCheckpointData(yaffs_Device *dev) +static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR *oh_name, + const YCHAR *name) { +#ifdef CONFIG_YAFFS_AUTO_UNICODE - int ok = 1; + int is_ascii; + YCHAR *w; - if(dev->skipCheckpointWrite || !dev->isYaffs2){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR))); - ok = 0; - } + if (dev->param.auto_unicode) { - if(ok) - ok = yaffs_CheckpointOpen(dev,1); + is_ascii = 1; + w = name; - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); - ok = yaffs_WriteCheckpointValidityMarker(dev,1); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint device" TENDSTR))); - ok = yaffs_WriteCheckpointDevice(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint objects" TENDSTR))); - ok = yaffs_WriteCheckpointObjects(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); - ok = yaffs_WriteCheckpointValidityMarker(dev,0); - } + /* Figure out if the name will fit in ascii character set */ + while (is_ascii && *w) { + if ((*w) & 0xff00) + is_ascii = 0; + w++; + } - if(ok){ - ok = yaffs_WriteCheckpointSum(dev); + if (is_ascii) { + /* It is an ASCII name, so convert unicode to ascii */ + char *ascii_oh_name = (char *)oh_name; + int n = YAFFS_MAX_NAME_LENGTH - 1; + while (n > 0 && *name) { + *ascii_oh_name = *name; + name++; + ascii_oh_name++; + n--; + } + } else { + /* Unicode name, so save starting at the second YCHAR */ + *oh_name = 0; + yaffs_strncpy(oh_name + 1, name, YAFFS_MAX_NAME_LENGTH - 2); + } + } else { +#else + dev = dev; + { +#endif + yaffs_strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1); } +} +/* UpdateObjectHeader updates the header on NAND for an object. + * If name is not NULL, then that new name is used. + */ +int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, int force, + int is_shrink, int shadows, struct yaffs_xattr_mod *xmod) +{ - if(!yaffs_CheckpointClose(dev)) - ok = 0; + struct yaffs_block_info *bi; + struct yaffs_dev *dev = in->my_dev; + int prev_chunk_id; + int ret_val = 0; + int result = 0; + int new_chunk_id; + struct yaffs_ext_tags new_tags; + struct yaffs_ext_tags old_tags; + const YCHAR *alias = NULL; + u8 *buffer = NULL; + YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; + struct yaffs_obj_hdr *oh = NULL; + loff_t file_size = 0; - if(ok) - dev->isCheckpointed = 1; - else - dev->isCheckpointed = 0; + yaffs_strcpy(old_name, _Y("silly old name")); - return dev->isCheckpointed; -} + if (in->fake && in != dev->root_dir && !force && !xmod) + return ret_val; -static int yaffs_ReadCheckpointData(yaffs_Device *dev) -{ - int ok = 1; + yaffs_check_gc(dev, 0); + yaffs_check_obj_details_loaded(in); - if(dev->skipCheckpointRead || !dev->isYaffs2){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR))); - ok = 0; - } + buffer = yaffs_get_temp_buffer(in->my_dev); + oh = (struct yaffs_obj_hdr *)buffer; - if(ok) - ok = yaffs_CheckpointOpen(dev,0); /* open for read */ + prev_chunk_id = in->hdr_chunk; - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); - ok = yaffs_ReadCheckpointValidityMarker(dev,1); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint device" TENDSTR))); - ok = yaffs_ReadCheckpointDevice(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint objects" TENDSTR))); - ok = yaffs_ReadCheckpointObjects(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); - ok = yaffs_ReadCheckpointValidityMarker(dev,0); - } + if (prev_chunk_id > 0) { + result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id, + buffer, &old_tags); - if(ok){ - ok = yaffs_ReadCheckpointSum(dev); - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint checksum %d" TENDSTR),ok)); + yaffs_verify_oh(in, oh, &old_tags, 0); + memcpy(old_name, oh->name, sizeof(oh->name)); + memset(buffer, 0xff, sizeof(struct yaffs_obj_hdr)); + } else { + memset(buffer, 0xff, dev->data_bytes_per_chunk); } - if(!yaffs_CheckpointClose(dev)) - ok = 0; - - if(ok) - dev->isCheckpointed = 1; - else - dev->isCheckpointed = 0; + oh->type = in->variant_type; + oh->yst_mode = in->yst_mode; + oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; - return ok ? 1 : 0; + yaffs_load_attribs_oh(oh, in); -} + if (in->parent) + oh->parent_obj_id = in->parent->obj_id; + else + oh->parent_obj_id = 0; -static void yaffs_InvalidateCheckpoint(yaffs_Device *dev) -{ - if(dev->isCheckpointed || - dev->blocksInCheckpoint > 0){ - dev->isCheckpointed = 0; - yaffs_CheckpointInvalidateStream(dev); - if(dev->superBlock && dev->markSuperBlockDirty) - dev->markSuperBlockDirty(dev->superBlock); + if (name && *name) { + memset(oh->name, 0, sizeof(oh->name)); + yaffs_load_oh_from_name(dev, oh->name, name); + } else if (prev_chunk_id > 0) { + memcpy(oh->name, old_name, sizeof(oh->name)); + } else { + memset(oh->name, 0, sizeof(oh->name)); } -} + oh->is_shrink = is_shrink; -int yaffs_CheckpointSave(yaffs_Device *dev) -{ - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); + switch (in->variant_type) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Should not happen */ + break; + case YAFFS_OBJECT_TYPE_FILE: + if (oh->parent_obj_id != YAFFS_OBJECTID_DELETED && + oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED) + file_size = in->variant.file_variant.file_size; + yaffs_oh_size_load(oh, file_size); + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + oh->equiv_id = in->variant.hardlink_variant.equiv_id; + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + alias = in->variant.symlink_variant.alias; + if (!alias) + alias = _Y("no alias"); + yaffs_strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH); + oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; + break; + } - yaffs_VerifyObjects(dev); - yaffs_VerifyBlocks(dev); - yaffs_VerifyFreeChunks(dev); + /* process any xattrib modifications */ + if (xmod) + yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); + + /* Tags */ + memset(&new_tags, 0, sizeof(new_tags)); + in->serial++; + new_tags.chunk_id = 0; + new_tags.obj_id = in->obj_id; + new_tags.serial_number = in->serial; + + /* Add extra info for file header */ + new_tags.extra_available = 1; + new_tags.extra_parent_id = oh->parent_obj_id; + new_tags.extra_file_size = file_size; + new_tags.extra_is_shrink = oh->is_shrink; + new_tags.extra_equiv_id = oh->equiv_id; + new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; + new_tags.extra_obj_type = in->variant_type; + yaffs_verify_oh(in, oh, &new_tags, 1); + + /* Create new chunk in NAND */ + new_chunk_id = + yaffs_write_new_chunk(dev, buffer, &new_tags, + (prev_chunk_id > 0) ? 1 : 0); - if(!dev->isCheckpointed) { - yaffs_InvalidateCheckpoint(dev); - yaffs_WriteCheckpointData(dev); - } + if (buffer) + yaffs_release_temp_buffer(dev, buffer); - T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); + if (new_chunk_id < 0) + return new_chunk_id; - return dev->isCheckpointed; -} + in->hdr_chunk = new_chunk_id; -int yaffs_CheckpointRestore(yaffs_Device *dev) -{ - int retval; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); + if (prev_chunk_id > 0) + yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); - retval = yaffs_ReadCheckpointData(dev); + if (!yaffs_obj_cache_dirty(in)) + in->dirty = 0; - if(dev->isCheckpointed){ - yaffs_VerifyObjects(dev); - yaffs_VerifyBlocks(dev); - yaffs_VerifyFreeChunks(dev); + /* If this was a shrink, then mark the block + * that the chunk lives on */ + if (is_shrink) { + bi = yaffs_get_block_info(in->my_dev, + new_chunk_id / + in->my_dev->param.chunks_per_block); + bi->has_shrink_hdr = 1; } - T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); - return retval; + return new_chunk_id; } /*--------------------- File read/write ------------------------ @@ -4447,622 +3432,550 @@ int yaffs_CheckpointRestore(yaffs_Device *dev) * Curve-balls: the first chunk might also be the last chunk. */ -int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset, - int nBytes) +int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes) { + int chunk; + u32 start; + int n_copy; + int n = n_bytes; + int n_done = 0; + struct yaffs_cache *cache; + struct yaffs_dev *dev; - __u32 chunk = 0; - __u32 start = 0; - int nToCopy; - int n = nBytes; - int nDone = 0; - yaffs_ChunkCache *cache; - - yaffs_Device *dev; - - dev = in->myDev; + dev = in->my_dev; while (n > 0) { - //chunk = offset / dev->nDataBytesPerChunk + 1; - //start = offset % dev->nDataBytesPerChunk; - yaffs_AddrToChunk(dev,offset,&chunk,&start); + yaffs_addr_to_chunk(dev, offset, &chunk, &start); chunk++; /* OK now check for the curveball where the start and end are in * the same chunk. */ - if ((start + n) < dev->nDataBytesPerChunk) { - nToCopy = n; - } else { - nToCopy = dev->nDataBytesPerChunk - start; - } + if ((start + n) < dev->data_bytes_per_chunk) + n_copy = n; + else + n_copy = dev->data_bytes_per_chunk - start; - cache = yaffs_FindChunkCache(in, chunk); + cache = yaffs_find_chunk_cache(in, chunk); - /* If the chunk is already in the cache or it is less than a whole chunk - * then use the cache (if there is caching) - * else bypass the cache. + /* If the chunk is already in the cache or it is less than + * a whole chunk or we're using inband tags then use the cache + * (if there is caching) else bypass the cache. */ - if (cache || nToCopy != dev->nDataBytesPerChunk) { - if (dev->nShortOpCaches > 0) { + if (cache || n_copy != dev->data_bytes_per_chunk || + dev->param.inband_tags) { + if (dev->param.n_caches > 0) { - /* If we can't find the data in the cache, then load it up. */ + /* If we can't find the data in the cache, + * then load it up. */ if (!cache) { - cache = yaffs_GrabChunkCache(in->myDev); + cache = + yaffs_grab_chunk_cache(in->my_dev); cache->object = in; - cache->chunkId = chunk; + cache->chunk_id = chunk; cache->dirty = 0; cache->locked = 0; - yaffs_ReadChunkDataFromObject(in, chunk, - cache-> - data); - cache->nBytes = 0; + yaffs_rd_data_obj(in, chunk, + cache->data); + cache->n_bytes = 0; } - yaffs_UseChunkCache(dev, cache, 0); + yaffs_use_cache(dev, cache, 0); cache->locked = 1; -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, &cache->data[start], nToCopy); + memcpy(buffer, &cache->data[start], n_copy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif cache->locked = 0; } else { - /* Read into the local buffer then copy..*/ - - __u8 *localBuffer = - yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ReadChunkDataFromObject(in, chunk, - localBuffer); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, &localBuffer[start], nToCopy); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - yaffs_ReleaseTempBuffer(dev, localBuffer, - __LINE__); - } - - } else { -#ifdef CONFIG_YAFFS_WINCE - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); - - /* Under WinCE can't do direct transfer. Need to use a local buffer. - * This is because we otherwise screw up WinCE's memory mapper - */ - yaffs_ReadChunkDataFromObject(in, chunk, localBuffer); + /* Read into the local buffer then copy.. */ -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, localBuffer, dev->nDataBytesPerChunk); + u8 *local_buffer = + yaffs_get_temp_buffer(dev); + yaffs_rd_data_obj(in, chunk, local_buffer); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -#endif + memcpy(buffer, &local_buffer[start], n_copy); -#else - /* A full chunk. Read directly into the supplied buffer. */ - yaffs_ReadChunkDataFromObject(in, chunk, buffer); -#endif + yaffs_release_temp_buffer(dev, local_buffer); + } + } else { + /* A full chunk. Read directly into the buffer. */ + yaffs_rd_data_obj(in, chunk, buffer); } - - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; - + n -= n_copy; + offset += n_copy; + buffer += n_copy; + n_done += n_copy; } - - return nDone; + return n_done; } -int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset, - int nBytes, int writeThrough) +int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset, + int n_bytes, int write_through) { - __u32 chunk = 0; - __u32 start = 0; - int nToCopy; - int n = nBytes; - int nDone = 0; - int nToWriteBack; - int startOfWrite = offset; - int chunkWritten = 0; - int nBytesRead; - - yaffs_Device *dev; - - dev = in->myDev; - - while (n > 0 && chunkWritten >= 0) { - //chunk = offset / dev->nDataBytesPerChunk + 1; - //start = offset % dev->nDataBytesPerChunk; - yaffs_AddrToChunk(dev,offset,&chunk,&start); - chunk++; + int chunk; + u32 start; + int n_copy; + int n = n_bytes; + int n_done = 0; + int n_writeback; + loff_t start_write = offset; + int chunk_written = 0; + u32 n_bytes_read; + loff_t chunk_start; + struct yaffs_dev *dev; + + dev = in->my_dev; + + while (n > 0 && chunk_written >= 0) { + yaffs_addr_to_chunk(dev, offset, &chunk, &start); + + if (((loff_t)chunk) * + dev->data_bytes_per_chunk + start != offset || + start >= dev->data_bytes_per_chunk) { + yaffs_trace(YAFFS_TRACE_ERROR, + "AddrToChunk of offset %lld gives chunk %d start %d", + offset, chunk, start); + } + chunk++; /* File pos to chunk in file offset */ /* OK now check for the curveball where the start and end are in * the same chunk. */ - if ((start + n) < dev->nDataBytesPerChunk) { - nToCopy = n; + if ((start + n) < dev->data_bytes_per_chunk) { + n_copy = n; - /* Now folks, to calculate how many bytes to write back.... - * If we're overwriting and not writing to then end of file then - * we need to write back as much as was there before. + /* Now calculate how many bytes to write back.... + * If we're overwriting and not writing to then end of + * file then we need to write back as much as was there + * before. */ - nBytesRead = - in->variant.fileVariant.fileSize - - ((chunk - 1) * dev->nDataBytesPerChunk); + chunk_start = (((loff_t)(chunk - 1)) * + dev->data_bytes_per_chunk); - if (nBytesRead > dev->nDataBytesPerChunk) { - nBytesRead = dev->nDataBytesPerChunk; - } + if (chunk_start > in->variant.file_variant.file_size) + n_bytes_read = 0; /* Past end of file */ + else + n_bytes_read = + in->variant.file_variant.file_size - + chunk_start; + + if (n_bytes_read > dev->data_bytes_per_chunk) + n_bytes_read = dev->data_bytes_per_chunk; - nToWriteBack = - (nBytesRead > - (start + n)) ? nBytesRead : (start + n); + n_writeback = + (n_bytes_read > + (start + n)) ? n_bytes_read : (start + n); + + if (n_writeback < 0 || + n_writeback > dev->data_bytes_per_chunk) + BUG(); } else { - nToCopy = dev->nDataBytesPerChunk - start; - nToWriteBack = dev->nDataBytesPerChunk; + n_copy = dev->data_bytes_per_chunk - start; + n_writeback = dev->data_bytes_per_chunk; } - if (nToCopy != dev->nDataBytesPerChunk) { - /* An incomplete start or end chunk (or maybe both start and end chunk) */ - if (dev->nShortOpCaches > 0) { - yaffs_ChunkCache *cache; - /* If we can't find the data in the cache, then load the cache */ - cache = yaffs_FindChunkCache(in, chunk); - - if (!cache - && yaffs_CheckSpaceForAllocation(in-> - myDev)) { - cache = yaffs_GrabChunkCache(in->myDev); + if (n_copy != dev->data_bytes_per_chunk || + dev->param.inband_tags) { + /* An incomplete start or end chunk (or maybe both + * start and end chunk), or we're using inband tags, + * so we want to use the cache buffers. + */ + if (dev->param.n_caches > 0) { + struct yaffs_cache *cache; + + /* If we can't find the data in the cache, then + * load the cache */ + cache = yaffs_find_chunk_cache(in, chunk); + + if (!cache && + yaffs_check_alloc_available(dev, 1)) { + cache = yaffs_grab_chunk_cache(dev); cache->object = in; - cache->chunkId = chunk; + cache->chunk_id = chunk; cache->dirty = 0; cache->locked = 0; - yaffs_ReadChunkDataFromObject(in, chunk, - cache-> - data); - } - else if(cache && - !cache->dirty && - !yaffs_CheckSpaceForAllocation(in->myDev)){ - /* Drop the cache if it was a read cache item and - * no space check has been made for it. + yaffs_rd_data_obj(in, chunk, + cache->data); + } else if (cache && + !cache->dirty && + !yaffs_check_alloc_available(dev, + 1)) { + /* Drop the cache if it was a read cache + * item and no space check has been made + * for it. */ - cache = NULL; + cache = NULL; } if (cache) { - yaffs_UseChunkCache(dev, cache, 1); + yaffs_use_cache(dev, cache, 1); cache->locked = 1; -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif memcpy(&cache->data[start], buffer, - nToCopy); + n_copy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif cache->locked = 0; - cache->nBytes = nToWriteBack; + cache->n_bytes = n_writeback; - if (writeThrough) { - chunkWritten = - yaffs_WriteChunkDataToObject + if (write_through) { + chunk_written = + yaffs_wr_data_obj (cache->object, - cache->chunkId, - cache->data, cache->nBytes, - 1); + cache->chunk_id, + cache->data, + cache->n_bytes, 1); cache->dirty = 0; } - } else { - chunkWritten = -1; /* fail the write */ + chunk_written = -1; /* fail write */ } } else { - /* An incomplete start or end chunk (or maybe both start and end chunk) - * Read into the local buffer then copy, then copy over and write back. + /* An incomplete start or end chunk (or maybe + * both start and end chunk). Read into the + * local buffer then copy over and write back. */ - __u8 *localBuffer = - yaffs_GetTempBuffer(dev, __LINE__); + u8 *local_buffer = yaffs_get_temp_buffer(dev); - yaffs_ReadChunkDataFromObject(in, chunk, - localBuffer); + yaffs_rd_data_obj(in, chunk, local_buffer); + memcpy(&local_buffer[start], buffer, n_copy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - - memcpy(&localBuffer[start], buffer, nToCopy); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, - localBuffer, - nToWriteBack, - 0); - - yaffs_ReleaseTempBuffer(dev, localBuffer, - __LINE__); + chunk_written = + yaffs_wr_data_obj(in, chunk, + local_buffer, + n_writeback, 0); + yaffs_release_temp_buffer(dev, local_buffer); } - } else { + /* A full chunk. Write directly from the buffer. */ -#ifdef CONFIG_YAFFS_WINCE - /* Under WinCE can't do direct transfer. Need to use a local buffer. - * This is because we otherwise screw up WinCE's memory mapper - */ - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(localBuffer, buffer, dev->nDataBytesPerChunk); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, localBuffer, - dev->nDataBytesPerChunk, - 0); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -#else - /* A full chunk. Write directly from the supplied buffer. */ - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, buffer, - dev->nDataBytesPerChunk, - 0); -#endif - /* Since we've overwritten the cached data, we better invalidate it. */ - yaffs_InvalidateChunkCache(in, chunk); - } + chunk_written = + yaffs_wr_data_obj(in, chunk, buffer, + dev->data_bytes_per_chunk, 0); - if (chunkWritten >= 0) { - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; + /* Since we've overwritten the cached data, + * we better invalidate it. */ + yaffs_invalidate_chunk_cache(in, chunk); } + if (chunk_written >= 0) { + n -= n_copy; + offset += n_copy; + buffer += n_copy; + n_done += n_copy; + } } /* Update file object */ - if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) { - in->variant.fileVariant.fileSize = (startOfWrite + nDone); - } + if ((start_write + n_done) > in->variant.file_variant.file_size) + in->variant.file_variant.file_size = (start_write + n_done); in->dirty = 1; - - return nDone; + return n_done; } +int yaffs_wr_file(struct yaffs_obj *in, const u8 *buffer, loff_t offset, + int n_bytes, int write_through) +{ + yaffs2_handle_hole(in, offset); + return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_through); +} /* ---------------------- File resizing stuff ------------------ */ -static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize) +static void yaffs_prune_chunks(struct yaffs_obj *in, loff_t new_size) { - yaffs_Device *dev = in->myDev; - int oldFileSize = in->variant.fileVariant.fileSize; + struct yaffs_dev *dev = in->my_dev; + loff_t old_size = in->variant.file_variant.file_size; + int i; + int chunk_id; + u32 dummy; + int last_del; + int start_del; - int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk; + if (old_size > 0) + yaffs_addr_to_chunk(dev, old_size - 1, &last_del, &dummy); + else + last_del = 0; - int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) / - dev->nDataBytesPerChunk; - int i; - int chunkId; + yaffs_addr_to_chunk(dev, new_size + dev->data_bytes_per_chunk - 1, + &start_del, &dummy); + last_del++; + start_del++; /* Delete backwards so that we don't end up with holes if * power is lost part-way through the operation. */ - for (i = lastDel; i >= startDel; i--) { + for (i = last_del; i >= start_del; i--) { /* NB this could be optimised somewhat, * eg. could retrieve the tags and write them without - * using yaffs_DeleteChunk + * using yaffs_chunk_del */ - chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL); - if (chunkId > 0) { - if (chunkId < - (dev->internalStartBlock * dev->nChunksPerBlock) - || chunkId >= - ((dev->internalEndBlock + - 1) * dev->nChunksPerBlock)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("Found daft chunkId %d for %d" TENDSTR), - chunkId, i)); - } else { - in->nDataChunks--; - yaffs_DeleteChunk(dev, chunkId, 1, __LINE__); - } + chunk_id = yaffs_find_del_file_chunk(in, i, NULL); + + if (chunk_id < 1) + continue; + + if (chunk_id < + (dev->internal_start_block * dev->param.chunks_per_block) || + chunk_id >= + ((dev->internal_end_block + 1) * + dev->param.chunks_per_block)) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Found daft chunk_id %d for %d", + chunk_id, i); + } else { + in->n_data_chunks--; + yaffs_chunk_del(dev, chunk_id, 1, __LINE__); } } - } -int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize) +void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size) { + int new_full; + u32 new_partial; + struct yaffs_dev *dev = obj->my_dev; - int oldFileSize = in->variant.fileVariant.fileSize; - __u32 newSizeOfPartialChunk = 0; - __u32 newFullChunks = 0; + yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial); - yaffs_Device *dev = in->myDev; + yaffs_prune_chunks(obj, new_size); - yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk); + if (new_partial != 0) { + int last_chunk = 1 + new_full; + u8 *local_buffer = yaffs_get_temp_buffer(dev); - yaffs_FlushFilesChunkCache(in); - yaffs_InvalidateWholeChunkCache(in); + /* Rewrite the last chunk with its new size and zero pad */ + yaffs_rd_data_obj(obj, last_chunk, local_buffer); + memset(local_buffer + new_partial, 0, + dev->data_bytes_per_chunk - new_partial); - yaffs_CheckGarbageCollection(dev); + yaffs_wr_data_obj(obj, last_chunk, local_buffer, + new_partial, 1); - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - return yaffs_GetFileSize(in); + yaffs_release_temp_buffer(dev, local_buffer); } - if (newSize == oldFileSize) { - return oldFileSize; - } - - if (newSize < oldFileSize) { - - yaffs_PruneResizedChunks(in, newSize); - - if (newSizeOfPartialChunk != 0) { - int lastChunk = 1 + newFullChunks; + obj->variant.file_variant.file_size = new_size; - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); + yaffs_prune_tree(dev, &obj->variant.file_variant); +} - /* Got to read and rewrite the last chunk with its new size and zero pad */ - yaffs_ReadChunkDataFromObject(in, lastChunk, - localBuffer); +int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size) +{ + struct yaffs_dev *dev = in->my_dev; + loff_t old_size = in->variant.file_variant.file_size; - memset(localBuffer + newSizeOfPartialChunk, 0, - dev->nDataBytesPerChunk - newSizeOfPartialChunk); + yaffs_flush_file_cache(in); + yaffs_invalidate_whole_cache(in); - yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer, - newSizeOfPartialChunk, 1); + yaffs_check_gc(dev, 0); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); - } + if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) + return YAFFS_FAIL; - in->variant.fileVariant.fileSize = newSize; + if (new_size == old_size) + return YAFFS_OK; - yaffs_PruneFileStructure(dev, &in->variant.fileVariant); + if (new_size > old_size) { + yaffs2_handle_hole(in, new_size); + in->variant.file_variant.file_size = new_size; } else { - /* newsSize > oldFileSize */ - in->variant.fileVariant.fileSize = newSize; + /* new_size < old_size */ + yaffs_resize_file_down(in, new_size); } - - - /* Write a new object header. + /* Write a new object header to reflect the resize. * show we've shrunk the file, if need be - * Do this only if the file is not in the deleted directories. + * Do this only if the file is not in the deleted directories + * and is not shadowed. */ - if (in->parent->objectId != YAFFS_OBJECTID_UNLINKED && - in->parent->objectId != YAFFS_OBJECTID_DELETED) { - yaffs_UpdateObjectHeader(in, NULL, 0, - (newSize < oldFileSize) ? 1 : 0, 0); - } + if (in->parent && + !in->is_shadowed && + in->parent->obj_id != YAFFS_OBJECTID_UNLINKED && + in->parent->obj_id != YAFFS_OBJECTID_DELETED) + yaffs_update_oh(in, NULL, 0, 0, 0, NULL); return YAFFS_OK; } -loff_t yaffs_GetFileSize(yaffs_Object * obj) -{ - obj = yaffs_GetEquivalentObject(obj); - - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - return obj->variant.fileVariant.fileSize; - case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_strlen(obj->variant.symLinkVariant.alias); - default: - return 0; - } -} - - - -int yaffs_FlushFile(yaffs_Object * in, int updateTime) +int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync) { - int retVal; - if (in->dirty) { - yaffs_FlushFilesChunkCache(in); - if (updateTime) { -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(in->win_mtime); -#else + if (!in->dirty) + return YAFFS_OK; - in->yst_mtime = Y_CURRENT_TIME; + yaffs_flush_file_cache(in); -#endif - } - - retVal = - (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >= - 0) ? YAFFS_OK : YAFFS_FAIL; - } else { - retVal = YAFFS_OK; - } + if (data_sync) + return YAFFS_OK; - return retVal; + if (update_time) + yaffs_load_current_time(in, 0, 0); + return (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= 0) ? + YAFFS_OK : YAFFS_FAIL; } -static int yaffs_DoGenericObjectDeletion(yaffs_Object * in) -{ - - /* First off, invalidate the file's data in the cache, without flushing. */ - yaffs_InvalidateWholeChunkCache(in); - if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) { - /* Move to the unlinked directory so we have a record that it was deleted. */ - yaffs_ChangeObjectName(in, in->myDev->deletedDir,"deleted", 0, 0); - - } - - yaffs_RemoveObjectFromDirectory(in); - yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__); - in->chunkId = -1; - - yaffs_FreeObject(in); - return YAFFS_OK; - -} - -/* yaffs_DeleteFile deletes the whole file data +/* yaffs_del_file deletes the whole file data * and the inode associated with the file. * It does not delete the links associated with the file. */ -static int yaffs_UnlinkFile(yaffs_Object * in) -{ - - int retVal; - int immediateDeletion = 0; - - if (1) { -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - if (!in->myInode) { - immediateDeletion = 1; - - } -#endif -#else - if (in->inUse <= 0) { - immediateDeletion = 1; - - } -#endif - if (immediateDeletion) { - retVal = - yaffs_ChangeObjectName(in, in->myDev->deletedDir, - "deleted", 0, 0); - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: immediate deletion of file %d" TENDSTR), - in->objectId)); - in->deleted = 1; - in->myDev->nDeletedFiles++; - if (0 && in->myDev->isYaffs2) { - yaffs_ResizeFile(in, 0); - } - yaffs_SoftDeleteFile(in); - } else { - retVal = - yaffs_ChangeObjectName(in, in->myDev->unlinkedDir, - "unlinked", 0, 0); - } - +static int yaffs_unlink_file_if_needed(struct yaffs_obj *in) +{ + int ret_val; + int del_now = 0; + struct yaffs_dev *dev = in->my_dev; + + if (!in->my_inode) + del_now = 1; + + if (del_now) { + ret_val = + yaffs_change_obj_name(in, in->my_dev->del_dir, + _Y("deleted"), 0, 0); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: immediate deletion of file %d", + in->obj_id); + in->deleted = 1; + in->my_dev->n_deleted_files++; + if (dev->param.disable_soft_del || dev->param.is_yaffs2) + yaffs_resize_file(in, 0); + yaffs_soft_del_file(in); + } else { + ret_val = + yaffs_change_obj_name(in, in->my_dev->unlinked_dir, + _Y("unlinked"), 0, 0); } - return retVal; + return ret_val; } -int yaffs_DeleteFile(yaffs_Object * in) +int yaffs_del_file(struct yaffs_obj *in) { - int retVal = YAFFS_OK; + int ret_val = YAFFS_OK; + int deleted; /* Need to cache value on stack if in is freed */ + struct yaffs_dev *dev = in->my_dev; - if (in->nDataChunks > 0) { - /* Use soft deletion if there is data in the file */ - if (!in->unlinked) { - retVal = yaffs_UnlinkFile(in); - } - if (retVal == YAFFS_OK && in->unlinked && !in->deleted) { + if (dev->param.disable_soft_del || dev->param.is_yaffs2) + yaffs_resize_file(in, 0); + + if (in->n_data_chunks > 0) { + /* Use soft deletion if there is data in the file. + * That won't be the case if it has been resized to zero. + */ + if (!in->unlinked) + ret_val = yaffs_unlink_file_if_needed(in); + + deleted = in->deleted; + + if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) { in->deleted = 1; - in->myDev->nDeletedFiles++; - yaffs_SoftDeleteFile(in); + deleted = 1; + in->my_dev->n_deleted_files++; + yaffs_soft_del_file(in); } - return in->deleted ? YAFFS_OK : YAFFS_FAIL; + return deleted ? YAFFS_OK : YAFFS_FAIL; } else { /* The file has no data chunks so we toss it immediately */ - yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top); - in->variant.fileVariant.top = NULL; - yaffs_DoGenericObjectDeletion(in); + yaffs_free_tnode(in->my_dev, in->variant.file_variant.top); + in->variant.file_variant.top = NULL; + yaffs_generic_obj_del(in); return YAFFS_OK; } } -static int yaffs_DeleteDirectory(yaffs_Object * in) +int yaffs_is_non_empty_dir(struct yaffs_obj *obj) { - /* First check that the directory is empty. */ - if (list_empty(&in->variant.directoryVariant.children)) { - return yaffs_DoGenericObjectDeletion(in); - } + return (obj && + obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && + !(list_empty(&obj->variant.dir_variant.children)); +} - return YAFFS_FAIL; +static int yaffs_del_dir(struct yaffs_obj *obj) +{ + /* First check that the directory is empty. */ + if (yaffs_is_non_empty_dir(obj)) + return YAFFS_FAIL; + return yaffs_generic_obj_del(obj); } -static int yaffs_DeleteSymLink(yaffs_Object * in) +static int yaffs_del_symlink(struct yaffs_obj *in) { - YFREE(in->variant.symLinkVariant.alias); + kfree(in->variant.symlink_variant.alias); + in->variant.symlink_variant.alias = NULL; - return yaffs_DoGenericObjectDeletion(in); + return yaffs_generic_obj_del(in); } -static int yaffs_DeleteHardLink(yaffs_Object * in) +static int yaffs_del_link(struct yaffs_obj *in) { - /* remove this hardlink from the list assocaited with the equivalent + /* remove this hardlink from the list associated with the equivalent * object */ - list_del(&in->hardLinks); - return yaffs_DoGenericObjectDeletion(in); + list_del_init(&in->hard_links); + return yaffs_generic_obj_del(in); } -static void yaffs_DestroyObject(yaffs_Object * obj) +int yaffs_del_obj(struct yaffs_obj *obj) { - switch (obj->variantType) { + int ret_val = -1; + + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: - yaffs_DeleteFile(obj); + ret_val = yaffs_del_file(obj); break; case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_DeleteDirectory(obj); + if (!list_empty(&obj->variant.dir_variant.dirty)) { + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "Remove object %d from dirty directories", + obj->obj_id); + list_del_init(&obj->variant.dir_variant.dirty); + } + return yaffs_del_dir(obj); break; case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_DeleteSymLink(obj); + ret_val = yaffs_del_symlink(obj); break; case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_DeleteHardLink(obj); + ret_val = yaffs_del_link(obj); break; case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_DoGenericObjectDeletion(obj); + ret_val = yaffs_generic_obj_del(obj); break; case YAFFS_OBJECT_TYPE_UNKNOWN: + ret_val = 0; break; /* should not happen. */ } + return ret_val; } -static int yaffs_UnlinkWorker(yaffs_Object * obj) +static int yaffs_unlink_worker(struct yaffs_obj *obj) { + int del_now = 0; + + if (!obj) + return YAFFS_FAIL; - if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - return yaffs_DeleteHardLink(obj); - } else if (!list_empty(&obj->hardLinks)) { + if (!obj->my_inode) + del_now = 1; + + yaffs_update_parent(obj->parent); + + if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { + return yaffs_del_link(obj); + } else if (!list_empty(&obj->hard_links)) { /* Curve ball: We're unlinking an object that has a hardlink. * * This problem arises because we are not strictly following @@ -5072,1638 +3985,532 @@ static int yaffs_UnlinkWorker(yaffs_Object * obj) * Instead, we do the following: * - Select a hardlink. * - Unhook it from the hard links - * - Unhook it from its parent directory (so that the rename can work) + * - Move it from its parent directory so that the rename works. * - Rename the object to the hardlink's name. * - Delete the hardlink */ - yaffs_Object *hl; - int retVal; + struct yaffs_obj *hl; + struct yaffs_obj *parent; + int ret_val; YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - hl = list_entry(obj->hardLinks.next, yaffs_Object, hardLinks); + hl = list_entry(obj->hard_links.next, struct yaffs_obj, + hard_links); - list_del_init(&hl->hardLinks); - list_del_init(&hl->siblings); + yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1); + parent = hl->parent; - yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1); + list_del_init(&hl->hard_links); - retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0); + yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); - if (retVal == YAFFS_OK) { - retVal = yaffs_DoGenericObjectDeletion(hl); - } - return retVal; + ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0); - } else { - switch (obj->variantType) { + if (ret_val == YAFFS_OK) + ret_val = yaffs_generic_obj_del(hl); + + return ret_val; + + } else if (del_now) { + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: - return yaffs_UnlinkFile(obj); + return yaffs_del_file(obj); break; case YAFFS_OBJECT_TYPE_DIRECTORY: - return yaffs_DeleteDirectory(obj); + list_del_init(&obj->variant.dir_variant.dirty); + return yaffs_del_dir(obj); break; case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_DeleteSymLink(obj); + return yaffs_del_symlink(obj); break; case YAFFS_OBJECT_TYPE_SPECIAL: - return yaffs_DoGenericObjectDeletion(obj); + return yaffs_generic_obj_del(obj); break; case YAFFS_OBJECT_TYPE_HARDLINK: case YAFFS_OBJECT_TYPE_UNKNOWN: default: return YAFFS_FAIL; } + } else if (yaffs_is_non_empty_dir(obj)) { + return YAFFS_FAIL; + } else { + return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir, + _Y("unlinked"), 0, 0); } } - -static int yaffs_UnlinkObject( yaffs_Object *obj) +static int yaffs_unlink_obj(struct yaffs_obj *obj) { - - if (obj && obj->unlinkAllowed) { - return yaffs_UnlinkWorker(obj); - } + if (obj && obj->unlink_allowed) + return yaffs_unlink_worker(obj); return YAFFS_FAIL; +} + +int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR *name) +{ + struct yaffs_obj *obj; + obj = yaffs_find_by_name(dir, name); + return yaffs_unlink_obj(obj); } -int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name) + +/* Note: + * If old_name is NULL then we take old_dir as the object to be renamed. + */ +int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR *old_name, + struct yaffs_obj *new_dir, const YCHAR *new_name) { - yaffs_Object *obj; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *existing_target = NULL; + int force = 0; + int result; + struct yaffs_dev *dev; + + if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + BUG(); + return YAFFS_FAIL; + } + if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + BUG(); + return YAFFS_FAIL; + } + + dev = old_dir->my_dev; + +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE + /* Special case for case insemsitive systems. + * While look-up is case insensitive, the name isn't. + * Therefore we might want to change x.txt to X.txt + */ + if (old_dir == new_dir && + old_name && new_name && + yaffs_strcmp(old_name, new_name) == 0) + force = 1; +#endif + + if (yaffs_strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) > + YAFFS_MAX_NAME_LENGTH) + /* ENAMETOOLONG */ + return YAFFS_FAIL; + + if (old_name) + obj = yaffs_find_by_name(old_dir, old_name); + else{ + obj = old_dir; + old_dir = obj->parent; + } + + if (obj && obj->rename_allowed) { + /* Now handle an existing target, if there is one */ + existing_target = yaffs_find_by_name(new_dir, new_name); + if (yaffs_is_non_empty_dir(existing_target)) { + return YAFFS_FAIL; /* ENOTEMPTY */ + } else if (existing_target && existing_target != obj) { + /* Nuke the target first, using shadowing, + * but only if it isn't the same object. + * + * Note we must disable gc here otherwise it can mess + * up the shadowing. + * + */ + dev->gc_disable = 1; + yaffs_change_obj_name(obj, new_dir, new_name, force, + existing_target->obj_id); + existing_target->is_shadowed = 1; + yaffs_unlink_obj(existing_target); + dev->gc_disable = 0; + } + + result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); + + yaffs_update_parent(old_dir); + if (new_dir != old_dir) + yaffs_update_parent(new_dir); - obj = yaffs_FindObjectByName(dir, name); - return yaffs_UnlinkObject(obj); + return result; + } + return YAFFS_FAIL; } /*----------------------- Initialisation Scanning ---------------------- */ -static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId, - int backwardScanning) +void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, + int backward_scanning) { - yaffs_Object *obj; + struct yaffs_obj *obj; - if (!backwardScanning) { - /* Handle YAFFS1 forward scanning case - * For YAFFS1 we always do the deletion - */ - - } else { + if (backward_scanning) { /* Handle YAFFS2 case (backward scanning) * If the shadowed object exists then ignore. */ - if (yaffs_FindObjectByNumber(dev, objId)) { + obj = yaffs_find_by_number(dev, obj_id); + if (obj) return; - } } - /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc. + /* Let's create it (if it does not exist) assuming it is a file so that + * it can do shrinking etc. * We put it in unlinked dir to be cleaned up after the scanning */ obj = - yaffs_FindOrCreateObjectByNumber(dev, objId, - YAFFS_OBJECT_TYPE_FILE); - yaffs_AddObjectToDirectory(dev->unlinkedDir, obj); - obj->variant.fileVariant.shrinkSize = 0; - obj->valid = 1; /* So that we don't read any other info for this file */ - + yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE); + if (!obj) + return; + obj->is_shadowed = 1; + yaffs_add_obj_to_dir(dev->unlinked_dir, obj); + obj->variant.file_variant.shrink_size = 0; + obj->valid = 1; /* So that we don't read any other info. */ } -typedef struct { - int seq; - int block; -} yaffs_BlockIndex; - - -static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList) +void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list) { - yaffs_Object *hl; - yaffs_Object *in; - - while (hardList) { - hl = hardList; - hardList = (yaffs_Object *) (hardList->hardLinks.next); + struct list_head *lh; + struct list_head *save; + struct yaffs_obj *hl; + struct yaffs_obj *in; - in = yaffs_FindObjectByNumber(dev, - hl->variant.hardLinkVariant. - equivalentObjectId); + list_for_each_safe(lh, save, hard_list) { + hl = list_entry(lh, struct yaffs_obj, hard_links); + in = yaffs_find_by_number(dev, + hl->variant.hardlink_variant.equiv_id); if (in) { /* Add the hardlink pointers */ - hl->variant.hardLinkVariant.equivalentObject = in; - list_add(&hl->hardLinks, &in->hardLinks); + hl->variant.hardlink_variant.equiv_obj = in; + list_add(&hl->hard_links, &in->hard_links); } else { /* Todo Need to report/handle this better. * Got a problem... hardlink to a non-existant object */ - hl->variant.hardLinkVariant.equivalentObject = NULL; - INIT_LIST_HEAD(&hl->hardLinks); - + hl->variant.hardlink_variant.equiv_obj = NULL; + INIT_LIST_HEAD(&hl->hard_links); } - } - } - - - - -static int ybicmp(const void *a, const void *b){ - register int aseq = ((yaffs_BlockIndex *)a)->seq; - register int bseq = ((yaffs_BlockIndex *)b)->seq; - register int ablock = ((yaffs_BlockIndex *)a)->block; - register int bblock = ((yaffs_BlockIndex *)b)->block; - if( aseq == bseq ) - return ablock - bblock; - else - return aseq - bseq; - -} - -static int yaffs_Scan(yaffs_Device * dev) +static void yaffs_strip_deleted_objs(struct yaffs_dev *dev) { - yaffs_ExtendedTags tags; - int blk; - int blockIterator; - int startIterator; - int endIterator; - int nBlocksToScan = 0; - - int chunk; - int c; - int deleted; - yaffs_BlockState state; - yaffs_Object *hardList = NULL; - yaffs_BlockInfo *bi; - int sequenceNumber; - yaffs_ObjectHeader *oh; - yaffs_Object *in; - yaffs_Object *parent; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - - int alloc_failed = 0; - - - __u8 *chunkData; - - yaffs_BlockIndex *blockIndex = NULL; - - if (dev->isYaffs2) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR))); - return YAFFS_FAIL; - } - - //TODO Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format. - - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR), - dev->internalStartBlock, dev->internalEndBlock)); - - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - - if (dev->isYaffs2) { - blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); - if(!blockIndex) - return YAFFS_FAIL; - } - - /* Scan all the blocks to determine their state */ - for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - bi = yaffs_GetBlockInfo(dev, blk); - yaffs_ClearChunkBits(dev, blk); - bi->pagesInUse = 0; - bi->softDeletions = 0; - - yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); - - bi->blockState = state; - bi->sequenceNumber = sequenceNumber; - - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, - state, sequenceNumber)); - - if (state == YAFFS_BLOCK_STATE_DEAD) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is bad" TENDSTR), blk)); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block empty " TENDSTR))); - dev->nErasedBlocks++; - dev->nFreeChunks += dev->nChunksPerBlock; - } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - - /* Determine the highest sequence number */ - if (dev->isYaffs2 && - sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && - sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - - blockIndex[nBlocksToScan].seq = sequenceNumber; - blockIndex[nBlocksToScan].block = blk; - - nBlocksToScan++; - - if (sequenceNumber >= dev->sequenceNumber) { - dev->sequenceNumber = sequenceNumber; - } - } else if (dev->isYaffs2) { - /* TODO: Nasty sequence number! */ - T(YAFFS_TRACE_SCAN, - (TSTR - ("Block scanning block %d has bad sequence number %d" - TENDSTR), blk, sequenceNumber)); - - } - } - } - - /* Sort the blocks - * Dungy old bubble sort for now... - */ - if (dev->isYaffs2) { - yaffs_BlockIndex temp; - int i; - int j; - - for (i = 0; i < nBlocksToScan; i++) - for (j = i + 1; j < nBlocksToScan; j++) - if (blockIndex[i].seq > blockIndex[j].seq) { - temp = blockIndex[j]; - blockIndex[j] = blockIndex[i]; - blockIndex[i] = temp; - } - } - - /* Now scan the blocks looking at the data. */ - if (dev->isYaffs2) { - startIterator = 0; - endIterator = nBlocksToScan - 1; - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); - } else { - startIterator = dev->internalStartBlock; - endIterator = dev->internalEndBlock; - } - - /* For each block.... */ - for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator; - blockIterator++) { - - if (dev->isYaffs2) { - /* get the block to scan in the correct order */ - blk = blockIndex[blockIterator].block; - } else { - blk = blockIterator; - } - - bi = yaffs_GetBlockInfo(dev, blk); - state = bi->blockState; - - deleted = 0; - - /* For each chunk in each block that needs scanning....*/ - for (c = 0; !alloc_failed && c < dev->nChunksPerBlock && - state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { - /* Read the tags and decide what to do */ - chunk = blk * dev->nChunksPerBlock + c; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (!dev->isYaffs2 && tags.chunkDeleted) { - /* YAFFS1 only... - * A deleted chunk - */ - deleted++; - dev->nFreeChunks++; - /*T((" %d %d deleted\n",blk,c)); */ - } else if (!tags.chunkUsed) { - /* An unassigned chunk in the block - * This means that either the block is empty or - * this is the one being allocated from - */ - - if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - } else { - /* this is the block being allocated from */ - T(YAFFS_TRACE_SCAN, - (TSTR - (" Allocating from %d %d" TENDSTR), - blk, c)); - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->allocationBlock = blk; - dev->allocationPage = c; - dev->allocationBlockFinder = blk; - /* Set it to here to encourage the allocator to go forth from here. */ - - /* Yaffs2 sanity check: - * This should be the one with the highest sequence number - */ - if (dev->isYaffs2 - && (dev->sequenceNumber != - bi->sequenceNumber)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: Allocation block %d was not highest sequence id:" - " block seq = %d, dev seq = %d" - TENDSTR), blk,bi->sequenceNumber,dev->sequenceNumber)); - } - } - - dev->nFreeChunks += (dev->nChunksPerBlock - c); - } else if (tags.chunkId > 0) { - /* chunkId > 0 so it is a data chunk... */ - unsigned int endpos; - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - YAFFS_OBJECT_TYPE_FILE); - /* PutChunkIntoFile checks for a clash (two data chunks with - * the same chunkId). - */ - - if(!in) - alloc_failed = 1; - - if(in){ - if(!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,1)) - alloc_failed = 1; - } - - endpos = - (tags.chunkId - 1) * dev->nDataBytesPerChunk + - tags.byteCount; - if (in && - in->variantType == YAFFS_OBJECT_TYPE_FILE - && in->variant.fileVariant.scannedFileSize < - endpos) { - in->variant.fileVariant. - scannedFileSize = endpos; - if (!dev->useHeaderFileSize) { - in->variant.fileVariant. - fileSize = - in->variant.fileVariant. - scannedFileSize; - } - - } - /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */ - } else { - /* chunkId == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object - */ - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, - chunkData, - NULL); - - oh = (yaffs_ObjectHeader *) chunkData; - - in = yaffs_FindObjectByNumber(dev, - tags.objectId); - if (in && in->variantType != oh->type) { - /* This should not happen, but somehow - * Wev'e ended up with an objectId that has been reused but not yet - * deleted, and worse still it has changed type. Delete the old object. - */ - - yaffs_DestroyObject(in); - - in = 0; - } - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - oh->type); - - if(!in) - alloc_failed = 1; - - if (in && oh->shadowsObject > 0) { - yaffs_HandleShadowedObject(dev, - oh-> - shadowsObject, - 0); - } - - if (in && in->valid) { - /* We have already filled this one. We have a duplicate and need to resolve it. */ - - unsigned existingSerial = in->serial; - unsigned newSerial = tags.serialNumber; - - if (dev->isYaffs2 || - ((existingSerial + 1) & 3) == - newSerial) { - /* Use new one - destroy the exisiting one */ - yaffs_DeleteChunk(dev, - in->chunkId, - 1, __LINE__); - in->valid = 0; - } else { - /* Use existing - destroy this one. */ - yaffs_DeleteChunk(dev, chunk, 1, - __LINE__); - } - } - - if (in && !in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - in->chunkId = chunk; - - } else if (in && !in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - in->chunkId = chunk; - - yaffs_SetObjectName(in, oh->name); - in->dirty = 0; - - /* directory stuff... - * hook up to parent - */ - - parent = - yaffs_FindOrCreateObjectByNumber - (dev, oh->parentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - if (parent->variantType == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variantType = - YAFFS_OBJECT_TYPE_DIRECTORY; - INIT_LIST_HEAD(&parent->variant. - directoryVariant. - children); - } else if (parent->variantType != - YAFFS_OBJECT_TYPE_DIRECTORY) - { - /* Hoosterman, another problem.... - * We're trying to use a non-directory as a directory - */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: attempting to use non-directory as" - " a directory in scan. Put in lost+found." - TENDSTR))); - parent = dev->lostNFoundDir; - } - - yaffs_AddObjectToDirectory(parent, in); - - if (0 && (parent == dev->deletedDir || - parent == dev->unlinkedDir)) { - in->deleted = 1; /* If it is unlinked at start up then it wants deleting */ - dev->nDeletedFiles++; - } - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run through this - * list and fix up all the chains. - */ - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - if (dev->isYaffs2 - && oh->isShrink) { - /* Prune back the shrunken chunks */ - yaffs_PruneResizedChunks - (in, oh->fileSize); - /* Mark the block as having a shrinkHeader */ - bi->hasShrinkHeader = 1; - } - - if (dev->useHeaderFileSize) - - in->variant.fileVariant. - fileSize = - oh->fileSize; - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant. - equivalentObjectId = - oh->equivalentObjectId; - in->hardLinks.next = - (struct list_head *) - hardList; - hardList = in; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - if(!in->variant.symLinkVariant.alias) - alloc_failed = 1; - break; - } - - if (parent == dev->deletedDir) { - yaffs_DestroyObject(in); - bi->hasShrinkHeader = 1; - } - } - } - } - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated.*/ - state = YAFFS_BLOCK_STATE_FULL; - } - - bi->blockState = state; - - /* Now let's see if it was dirty */ - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState == YAFFS_BLOCK_STATE_FULL) { - yaffs_BlockBecameDirty(dev, blk); - } - - } - - if (blockIndex) { - YFREE(blockIndex); - } - - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. + /* + * Sort out state of unlinked and deleted objects after scanning. */ + struct list_head *i; + struct list_head *n; + struct yaffs_obj *l; - yaffs_HardlinkFixup(dev,hardList); + if (dev->read_only) + return; - /* Handle the unlinked files. Since they were left in an unlinked state we should - * just delete them. - */ - { - struct list_head *i; - struct list_head *n; - - yaffs_Object *l; - /* Soft delete all the unlinked files */ - list_for_each_safe(i, n, - &dev->unlinkedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - } - } + /* Soft delete all the unlinked files */ + list_for_each_safe(i, n, + &dev->unlinked_dir->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); + yaffs_del_obj(l); } - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - - if(alloc_failed){ - return YAFFS_FAIL; + list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); + yaffs_del_obj(l); } - - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR))); - - - return YAFFS_OK; } -static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in) -{ - __u8 *chunkData; - yaffs_ObjectHeader *oh; - yaffs_Device *dev = in->myDev; - yaffs_ExtendedTags tags; - - if(!in) - return; - -#if 0 - T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR), - in->objectId, - in->lazyLoaded ? "not yet" : "already")); -#endif - - if(in->lazyLoaded){ - in->lazyLoaded = 0; - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - yaffs_ReadChunkWithTagsFromNAND(dev, in->chunkId, - chunkData, &tags); - oh = (yaffs_ObjectHeader *) chunkData; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; - -#endif - yaffs_SetObjectName(in, oh->name); - - if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK){ - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - } +/* + * This code iterates through all the objects making sure that they are rooted. + * Any unrooted objects are re-rooted in lost+found. + * An object needs to be in one of: + * - Directly under deleted, unlinked + * - Directly or indirectly under root. + * + * Note: + * This code assumes that we don't ever change the current relationships + * between directories: + * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL + * lost-n-found->parent == root_dir + * + * This fixes the problem where directories might have inadvertently been + * deleted leaving the object "hanging" without being rooted in the + * directory tree. + */ - yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__); - } +static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj) +{ + return (obj == dev->del_dir || + obj == dev->unlinked_dir || obj == dev->root_dir); } -static int yaffs_ScanBackwards(yaffs_Device * dev) +static void yaffs_fix_hanging_objs(struct yaffs_dev *dev) { - yaffs_ExtendedTags tags; - int blk; - int blockIterator; - int startIterator; - int endIterator; - int nBlocksToScan = 0; - - int chunk; - int c; - yaffs_BlockState state; - yaffs_Object *hardList = NULL; - yaffs_BlockInfo *bi; - int sequenceNumber; - yaffs_ObjectHeader *oh; - yaffs_Object *in; - yaffs_Object *parent; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - int itsUnlinked; - __u8 *chunkData; - - int fileSize; - int isShrink; - int foundChunksInBlock; - int equivalentObjectId; - int alloc_failed = 0; - - - yaffs_BlockIndex *blockIndex = NULL; - int altBlockIndex = 0; - - if (!dev->isYaffs2) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR))); - return YAFFS_FAIL; - } - - T(YAFFS_TRACE_SCAN, - (TSTR - ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." - TENDSTR), dev->internalStartBlock, dev->internalEndBlock)); - - - dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - - blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); - - if(!blockIndex) { - blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex)); - altBlockIndex = 1; - } - - if(!blockIndex) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR))); - return YAFFS_FAIL; - } - - dev->blocksInCheckpoint = 0; - - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - /* Scan all the blocks to determine their state */ - for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - bi = yaffs_GetBlockInfo(dev, blk); - yaffs_ClearChunkBits(dev, blk); - bi->pagesInUse = 0; - bi->softDeletions = 0; - - yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); - - bi->blockState = state; - bi->sequenceNumber = sequenceNumber; - - if(bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) - bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT; - - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, - state, sequenceNumber)); - - - if(state == YAFFS_BLOCK_STATE_CHECKPOINT){ - dev->blocksInCheckpoint++; - - } else if (state == YAFFS_BLOCK_STATE_DEAD) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is bad" TENDSTR), blk)); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block empty " TENDSTR))); - dev->nErasedBlocks++; - dev->nFreeChunks += dev->nChunksPerBlock; - } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - - /* Determine the highest sequence number */ - if (dev->isYaffs2 && - sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && - sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - - blockIndex[nBlocksToScan].seq = sequenceNumber; - blockIndex[nBlocksToScan].block = blk; - - nBlocksToScan++; - - if (sequenceNumber >= dev->sequenceNumber) { - dev->sequenceNumber = sequenceNumber; - } - } else if (dev->isYaffs2) { - /* TODO: Nasty sequence number! */ - T(YAFFS_TRACE_SCAN, - (TSTR - ("Block scanning block %d has bad sequence number %d" - TENDSTR), blk, sequenceNumber)); - - } - } - } - - T(YAFFS_TRACE_SCAN, - (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan)); - - - - YYIELD(); - - /* Sort the blocks */ -#ifndef CONFIG_YAFFS_USE_OWN_SORT - { - /* Use qsort now. */ - yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp); - } -#else - { - /* Dungy old bubble sort... */ - - yaffs_BlockIndex temp; - int i; - int j; - - for (i = 0; i < nBlocksToScan; i++) - for (j = i + 1; j < nBlocksToScan; j++) - if (blockIndex[i].seq > blockIndex[j].seq) { - temp = blockIndex[j]; - blockIndex[j] = blockIndex[i]; - blockIndex[i] = temp; - } - } -#endif - - YYIELD(); - - T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR))); - - /* Now scan the blocks looking at the data. */ - startIterator = 0; - endIterator = nBlocksToScan - 1; - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); - - /* For each block.... backwards */ - for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator; - blockIterator--) { - /* Cooperative multitasking! This loop can run for so - long that watchdog timers expire. */ - YYIELD(); - - /* get the block to scan in the correct order */ - blk = blockIndex[blockIterator].block; - - bi = yaffs_GetBlockInfo(dev, blk); - - - state = bi->blockState; - - /* For each chunk in each block that needs scanning.... */ - foundChunksInBlock = 0; - for (c = dev->nChunksPerBlock - 1; - !alloc_failed && c >= 0 && - (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { - /* Scan backwards... - * Read the tags and decide what to do - */ - - chunk = blk * dev->nChunksPerBlock + c; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (!tags.chunkUsed) { - /* An unassigned chunk in the block. - * If there are used chunks after this one, then - * it is a chunk that was skipped due to failing the erased - * check. Just skip it so that it can be deleted. - * But, more typically, We get here when this is an unallocated - * chunk and his means that either the block is empty or - * this is the one being allocated from - */ - - if(foundChunksInBlock) - { - /* This is a chunk that was skipped due to failing the erased check */ - - } else if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - } else { - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING) { - if(dev->sequenceNumber == bi->sequenceNumber) { - /* this is the block being allocated from */ - - T(YAFFS_TRACE_SCAN, - (TSTR - (" Allocating from %d %d" - TENDSTR), blk, c)); - - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->allocationBlock = blk; - dev->allocationPage = c; - dev->allocationBlockFinder = blk; - } - else { - /* This is a partially written block that is not - * the current allocation block. This block must have - * had a write failure, so set up for retirement. - */ - - bi->needsRetiring = 1; - bi->gcPrioritise = 1; - - T(YAFFS_TRACE_ALWAYS, - (TSTR("Partially written block %d being set for retirement" TENDSTR), - blk)); - } - - } - - } - - dev->nFreeChunks++; - - } else if (tags.chunkId > 0) { - /* chunkId > 0 so it is a data chunk... */ - unsigned int endpos; - __u32 chunkBase = - (tags.chunkId - 1) * dev->nDataBytesPerChunk; - - foundChunksInBlock = 1; - - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - YAFFS_OBJECT_TYPE_FILE); - if(!in){ - /* Out of memory */ - alloc_failed = 1; - } - - if (in && - in->variantType == YAFFS_OBJECT_TYPE_FILE - && chunkBase < - in->variant.fileVariant.shrinkSize) { - /* This has not been invalidated by a resize */ - if(!yaffs_PutChunkIntoFile(in, tags.chunkId, - chunk, -1)){ - alloc_failed = 1; - } + struct yaffs_obj *obj; + struct yaffs_obj *parent; + int i; + struct list_head *lh; + struct list_head *n; + int depth_limit; + int hanging; - /* File size is calculated by looking at the data chunks if we have not - * seen an object header yet. Stop this practice once we find an object header. - */ - endpos = - (tags.chunkId - - 1) * dev->nDataBytesPerChunk + - tags.byteCount; - - if (!in->valid && /* have not got an object header yet */ - in->variant.fileVariant. - scannedFileSize < endpos) { - in->variant.fileVariant. - scannedFileSize = endpos; - in->variant.fileVariant. - fileSize = - in->variant.fileVariant. - scannedFileSize; - } + if (dev->read_only) + return; - } else if(in) { - /* This chunk has been invalidated by a resize, so delete */ - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); + /* Iterate through the objects in each hash entry, + * looking at each object. + * Make sure it is rooted. + */ - } + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + list_for_each_safe(lh, n, &dev->obj_bucket[i].list) { + obj = list_entry(lh, struct yaffs_obj, hash_link); + parent = obj->parent; + + if (yaffs_has_null_parent(dev, obj)) { + /* These directories are not hanging */ + hanging = 0; + } else if (!parent || + parent->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + hanging = 1; + } else if (yaffs_has_null_parent(dev, parent)) { + hanging = 0; } else { - /* chunkId == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object + /* + * Need to follow the parent chain to + * see if it is hanging. */ - foundChunksInBlock = 1; - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - oh = NULL; - in = NULL; - - if (tags.extraHeaderInfoAvailable) { - in = yaffs_FindOrCreateObjectByNumber - (dev, tags.objectId, - tags.extraObjectType); - } - - if (!in || -#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD - !in->valid || -#endif - tags.extraShadows || - (!in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) - ) { - - /* If we don't have valid info then we need to read the chunk - * TODO In future we can probably defer reading the chunk and - * living with invalid data until needed. - */ - - yaffs_ReadChunkWithTagsFromNAND(dev, - chunk, - chunkData, - NULL); - - oh = (yaffs_ObjectHeader *) chunkData; - - if (!in) - in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type); - - } - - if (!in) { - /* TODO Hoosterman we have a problem! */ - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: Could not make object for object %d " - "at chunk %d during scan" - TENDSTR), tags.objectId, chunk)); - - } - - if (in->valid) { - /* We have already filled this one. - * We have a duplicate that will be discarded, but - * we first have to suck out resize info if it is a file. - */ - - if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) && - ((oh && - oh-> type == YAFFS_OBJECT_TYPE_FILE)|| - (tags.extraHeaderInfoAvailable && - tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE)) - ) { - __u32 thisSize = - (oh) ? oh->fileSize : tags. - extraFileLength; - __u32 parentObjectId = - (oh) ? oh-> - parentObjectId : tags. - extraParentObjectId; - unsigned isShrink = - (oh) ? oh->isShrink : tags. - extraIsShrinkHeader; - - /* If it is deleted (unlinked at start also means deleted) - * we treat the file size as being zeroed at this point. - */ - if (parentObjectId == - YAFFS_OBJECTID_DELETED - || parentObjectId == - YAFFS_OBJECTID_UNLINKED) { - thisSize = 0; - isShrink = 1; - } - - if (isShrink && - in->variant.fileVariant. - shrinkSize > thisSize) { - in->variant.fileVariant. - shrinkSize = - thisSize; - } - - if (isShrink) { - bi->hasShrinkHeader = 1; - } - - } - /* Use existing - destroy this one. */ - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - + hanging = 0; + depth_limit = 100; + + while (parent != dev->root_dir && + parent->parent && + parent->parent->variant_type == + YAFFS_OBJECT_TYPE_DIRECTORY && + depth_limit > 0) { + parent = parent->parent; + depth_limit--; } - - if (!in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == - YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - - if(oh) { - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; - -#endif - } else { - in->variantType = tags.extraObjectType; - in->lazyLoaded = 1; - } - - in->chunkId = chunk; - - } else if (!in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->chunkId = chunk; - - if(oh) { - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - - if (oh->shadowsObject > 0) - yaffs_HandleShadowedObject(dev, - oh-> - shadowsObject, - 1); - - - yaffs_SetObjectName(in, oh->name); - parent = - yaffs_FindOrCreateObjectByNumber - (dev, oh->parentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - - fileSize = oh->fileSize; - isShrink = oh->isShrink; - equivalentObjectId = oh->equivalentObjectId; - - } - else { - in->variantType = tags.extraObjectType; - parent = - yaffs_FindOrCreateObjectByNumber - (dev, tags.extraParentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - fileSize = tags.extraFileLength; - isShrink = tags.extraIsShrinkHeader; - equivalentObjectId = tags.extraEquivalentObjectId; - in->lazyLoaded = 1; - - } - in->dirty = 0; - - /* directory stuff... - * hook up to parent - */ - - if (parent->variantType == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variantType = - YAFFS_OBJECT_TYPE_DIRECTORY; - INIT_LIST_HEAD(&parent->variant. - directoryVariant. - children); - } else if (parent->variantType != - YAFFS_OBJECT_TYPE_DIRECTORY) - { - /* Hoosterman, another problem.... - * We're trying to use a non-directory as a directory - */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: attempting to use non-directory as" - " a directory in scan. Put in lost+found." - TENDSTR))); - parent = dev->lostNFoundDir; - } - - yaffs_AddObjectToDirectory(parent, in); - - itsUnlinked = (parent == dev->deletedDir) || - (parent == dev->unlinkedDir); - - if (isShrink) { - /* Mark the block as having a shrinkHeader */ - bi->hasShrinkHeader = 1; - } - - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run - * through this list and fix up all the chains. - */ - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - - if (in->variant.fileVariant. - scannedFileSize < fileSize) { - /* This covers the case where the file size is greater - * than where the data is - * This will happen if the file is resized to be larger - * than its current data extents. - */ - in->variant.fileVariant.fileSize = fileSize; - in->variant.fileVariant.scannedFileSize = - in->variant.fileVariant.fileSize; - } - - if (isShrink && - in->variant.fileVariant.shrinkSize > fileSize) { - in->variant.fileVariant.shrinkSize = fileSize; - } - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - if(!itsUnlinked) { - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObjectId; - in->hardLinks.next = - (struct list_head *) hardList; - hardList = in; - } - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - if(oh){ - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh-> - alias); - if(!in->variant.symLinkVariant.alias) - alloc_failed = 1; - } - break; - } - - } - + if (parent != dev->root_dir) + hanging = 1; } - - } /* End of scanning for each chunk */ - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - } - - bi->blockState = state; - - /* Now let's see if it was dirty */ - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState == YAFFS_BLOCK_STATE_FULL) { - yaffs_BlockBecameDirty(dev, blk); - } - - } - - if (altBlockIndex) - YFREE_ALT(blockIndex); - else - YFREE(blockIndex); - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. - */ - yaffs_HardlinkFixup(dev,hardList); - - - /* - * Sort out state of unlinked and deleted objects. - */ - { - struct list_head *i; - struct list_head *n; - - yaffs_Object *l; - - /* Soft delete all the unlinked files */ - list_for_each_safe(i, n, - &dev->unlinkedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - } - } - - /* Soft delete all the deletedDir files */ - list_for_each_safe(i, n, - &dev->deletedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - + if (hanging) { + yaffs_trace(YAFFS_TRACE_SCAN, + "Hanging object %d moved to lost and found", + obj->obj_id); + yaffs_add_obj_to_dir(dev->lost_n_found, obj); } } } - - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - - if(alloc_failed){ - return YAFFS_FAIL; - } - - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR))); - - return YAFFS_OK; } -/*------------------------------ Directory Functions ----------------------------- */ - -static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj) +/* + * Delete directory contents for cleaning up lost and found. + */ +static void yaffs_del_dir_contents(struct yaffs_obj *dir) { - yaffs_Device *dev = obj->myDev; + struct yaffs_obj *obj; + struct list_head *lh; + struct list_head *n; - if(dev && dev->removeObjectCallback) - dev->removeObjectCallback(obj); + if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + BUG(); - list_del_init(&obj->siblings); - obj->parent = NULL; + list_for_each_safe(lh, n, &dir->variant.dir_variant.children) { + obj = list_entry(lh, struct yaffs_obj, siblings); + if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) + yaffs_del_dir_contents(obj); + yaffs_trace(YAFFS_TRACE_SCAN, + "Deleting lost_found object %d", + obj->obj_id); + yaffs_unlink_obj(obj); + } } - -static void yaffs_AddObjectToDirectory(yaffs_Object * directory, - yaffs_Object * obj) +static void yaffs_empty_l_n_f(struct yaffs_dev *dev) { - - if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a null pointer directory" - TENDSTR))); - YBUG(); - } - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a non-directory" - TENDSTR))); - YBUG(); - } - - if (obj->siblings.prev == NULL) { - /* Not initialised */ - INIT_LIST_HEAD(&obj->siblings); - - } else if (!list_empty(&obj->siblings)) { - /* If it is holed up somewhere else, un hook it */ - yaffs_RemoveObjectFromDirectory(obj); - } - /* Now add it */ - list_add(&obj->siblings, &directory->variant.directoryVariant.children); - obj->parent = directory; - - if (directory == obj->myDev->unlinkedDir - || directory == obj->myDev->deletedDir) { - obj->unlinked = 1; - obj->myDev->nUnlinkedFiles++; - obj->renameAllowed = 0; - } + yaffs_del_dir_contents(dev->lost_n_found); } -yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory, - const YCHAR * name) + +struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory, + const YCHAR *name) { int sum; - struct list_head *i; YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; + struct yaffs_obj *l; - yaffs_Object *l; - - if (!name) { + if (!name) return NULL; - } if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: null pointer directory" - TENDSTR))); - YBUG(); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_find_by_name: null pointer directory" + ); + BUG(); + return NULL; } - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); - YBUG(); + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_find_by_name: non-directory" + ); + BUG(); } - sum = yaffs_CalcNameSum(name); + sum = yaffs_calc_name_sum(name); - list_for_each(i, &directory->variant.directoryVariant.children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); + list_for_each(i, &directory->variant.dir_variant.children) { + l = list_entry(i, struct yaffs_obj, siblings); - yaffs_CheckObjectDetailsLoaded(l); + if (l->parent != directory) + BUG(); - /* Special case for lost-n-found */ - if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) { - return l; - } - } else if (yaffs_SumCompare(l->sum, sum) || l->chunkId <= 0) - { - /* LostnFound cunk called Objxxx - * Do a real check - */ - yaffs_GetObjectName(l, buffer, - YAFFS_MAX_NAME_LENGTH); - if (yaffs_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) { - return l; - } + yaffs_check_obj_details_loaded(l); - } + /* Special case for lost-n-found */ + if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { + if (!yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME)) + return l; + } else if (l->sum == sum || l->hdr_chunk <= 0) { + /* LostnFound chunk called Objxxx + * Do a real check + */ + yaffs_get_obj_name(l, buffer, + YAFFS_MAX_NAME_LENGTH + 1); + if (!yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH)) + return l; } } - return NULL; } - -#if 0 -int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir, - int (*fn) (yaffs_Object *)) -{ - struct list_head *i; - yaffs_Object *l; - - if (!theDir) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: null pointer directory" - TENDSTR))); - YBUG(); - } - if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); - YBUG(); - } - - list_for_each(i, &theDir->variant.directoryVariant.children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - if (l && !fn(l)) { - return YAFFS_FAIL; - } - } - } - - return YAFFS_OK; - -} -#endif - /* GetEquivalentObject dereferences any hard links to get to the * actual object. */ -yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj) +struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj) { - if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - /* We want the object id of the equivalent object, not this one */ - obj = obj->variant.hardLinkVariant.equivalentObject; - yaffs_CheckObjectDetailsLoaded(obj); + if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { + obj = obj->variant.hardlink_variant.equiv_obj; + yaffs_check_obj_details_loaded(obj); } return obj; - } -int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize) -{ - memset(name, 0, buffSize * sizeof(YCHAR)); - - yaffs_CheckObjectDetailsLoaded(obj); +/* + * A note or two on object names. + * * If the object name is missing, we then make one up in the form objnnn + * + * * ASCII names are stored in the object header's name field from byte zero + * * Unicode names are historically stored starting from byte zero. + * + * Then there are automatic Unicode names... + * The purpose of these is to save names in a way that can be read as + * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII + * system to share files. + * + * These automatic unicode are stored slightly differently... + * - If the name can fit in the ASCII character space then they are saved as + * ascii names as per above. + * - If the name needs Unicode then the name is saved in Unicode + * starting at oh->name[1]. - if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1); - } else if (obj->chunkId <= 0) { - YCHAR locName[20]; + */ +static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR *name, + int buffer_size) +{ + /* Create an object name if we could not find one. */ + if (yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) { + YCHAR local_name[20]; + YCHAR num_string[20]; + YCHAR *x = &num_string[19]; + unsigned v = obj->obj_id; + num_string[19] = 0; + while (v > 0) { + x--; + *x = '0' + (v % 10); + v /= 10; + } /* make up a name */ - yaffs_sprintf(locName, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX, - obj->objectId); - yaffs_strncpy(name, locName, buffSize - 1); - - } -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - else if (obj->shortName[0]) { - yaffs_strcpy(name, obj->shortName); + yaffs_strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX); + yaffs_strcat(local_name, x); + yaffs_strncpy(name, local_name, buffer_size - 1); } -#endif - else { - __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__); +} + +int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR *name, int buffer_size) +{ + memset(name, 0, buffer_size * sizeof(YCHAR)); + yaffs_check_obj_details_loaded(obj); + if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { + yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1); + } else if (obj->short_name[0]) { + yaffs_strcpy(name, obj->short_name); + } else if (obj->hdr_chunk > 0) { + int result; + u8 *buffer = yaffs_get_temp_buffer(obj->my_dev); - yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer; + struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer; - memset(buffer, 0, obj->myDev->nDataBytesPerChunk); + memset(buffer, 0, obj->my_dev->data_bytes_per_chunk); - if (obj->chunkId >= 0) { - yaffs_ReadChunkWithTagsFromNAND(obj->myDev, - obj->chunkId, buffer, - NULL); + if (obj->hdr_chunk > 0) { + result = yaffs_rd_chunk_tags_nand(obj->my_dev, + obj->hdr_chunk, + buffer, NULL); } - yaffs_strncpy(name, oh->name, buffSize - 1); + yaffs_load_name_from_oh(obj->my_dev, name, oh->name, + buffer_size); - yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__); + yaffs_release_temp_buffer(obj->my_dev, buffer); } - return yaffs_strlen(name); + yaffs_fix_null_name(obj, name, buffer_size); + + return yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH); } -int yaffs_GetObjectFileLength(yaffs_Object * obj) +loff_t yaffs_get_obj_length(struct yaffs_obj *obj) { - /* Dereference any hard linking */ - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) { - return obj->variant.fileVariant.fileSize; - } - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) { - return yaffs_strlen(obj->variant.symLinkVariant.alias); + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) + return obj->variant.file_variant.file_size; + if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { + if (!obj->variant.symlink_variant.alias) + return 0; + return yaffs_strnlen(obj->variant.symlink_variant.alias, + YAFFS_MAX_ALIAS_LENGTH); } else { /* Only a directory should drop through to here */ - return obj->myDev->nDataBytesPerChunk; + return obj->my_dev->data_bytes_per_chunk; } } -int yaffs_GetObjectLinkCount(yaffs_Object * obj) +int yaffs_get_obj_link_count(struct yaffs_obj *obj) { int count = 0; struct list_head *i; - if (!obj->unlinked) { + if (!obj->unlinked) count++; /* the object itself */ - } - list_for_each(i, &obj->hardLinks) { - count++; /* add the hard links; */ - } - return count; + list_for_each(i, &obj->hard_links) + count++; /* add the hard links; */ + + return count; } -int yaffs_GetObjectInode(yaffs_Object * obj) +int yaffs_get_obj_inode(struct yaffs_obj *obj) { - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - return obj->objectId; + return obj->obj_id; } -unsigned yaffs_GetObjectType(yaffs_Object * obj) +unsigned yaffs_get_obj_type(struct yaffs_obj *obj) { - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - switch (obj->variantType) { + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: return DT_REG; break; @@ -6725,605 +4532,501 @@ unsigned yaffs_GetObjectType(yaffs_Object * obj) return DT_BLK; if (S_ISSOCK(obj->yst_mode)) return DT_SOCK; + return DT_REG; + break; default: return DT_REG; break; } } -YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj) -{ - obj = yaffs_GetEquivalentObject(obj); - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) { - return yaffs_CloneString(obj->variant.symLinkVariant.alias); - } else { - return yaffs_CloneString(_Y("")); - } -} - -#ifndef CONFIG_YAFFS_WINCE - -int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr) -{ - unsigned int valid = attr->ia_valid; - - if (valid & ATTR_MODE) - obj->yst_mode = attr->ia_mode; - if (valid & ATTR_UID) - obj->yst_uid = attr->ia_uid; - if (valid & ATTR_GID) - obj->yst_gid = attr->ia_gid; - - if (valid & ATTR_ATIME) - obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); - if (valid & ATTR_CTIME) - obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); - if (valid & ATTR_MTIME) - obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); - - if (valid & ATTR_SIZE) - yaffs_ResizeFile(obj, attr->ia_size); - - yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0); - - return YAFFS_OK; - -} -int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr) +YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj) { - unsigned int valid = 0; - - attr->ia_mode = obj->yst_mode; - valid |= ATTR_MODE; - attr->ia_uid = obj->yst_uid; - valid |= ATTR_UID; - attr->ia_gid = obj->yst_gid; - valid |= ATTR_GID; - - Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; - valid |= ATTR_ATIME; - Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; - valid |= ATTR_CTIME; - Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; - valid |= ATTR_MTIME; - - attr->ia_size = yaffs_GetFileSize(obj); - valid |= ATTR_SIZE; - - attr->ia_valid = valid; - - return YAFFS_OK; - -} - -#endif - -#if 0 -int yaffs_DumpObject(yaffs_Object * obj) -{ - YCHAR name[257]; - - yaffs_GetObjectName(obj, name, 256); - - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d" - " chunk %d type %d size %d\n" - TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name, - obj->dirty, obj->valid, obj->serial, obj->sum, obj->chunkId, - yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj))); - - return YAFFS_OK; + obj = yaffs_get_equivalent_obj(obj); + if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) + return yaffs_clone_str(obj->variant.symlink_variant.alias); + else + return yaffs_clone_str(_Y("")); } -#endif -/*---------------------------- Initialisation code -------------------------------------- */ +/*--------------------------- Initialisation code -------------------------- */ -static int yaffs_CheckDevFunctions(const yaffs_Device * dev) +static int yaffs_check_dev_fns(const struct yaffs_dev *dev) { - /* Common functions, gotta have */ - if (!dev->eraseBlockInNAND || !dev->initialiseNAND) + if (!dev->param.erase_fn || !dev->param.initialise_flash_fn) return 0; -#ifdef CONFIG_YAFFS_YAFFS2 - /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ - if (dev->writeChunkWithTagsToNAND && - dev->readChunkWithTagsFromNAND && - !dev->writeChunkToNAND && - !dev->readChunkFromNAND && - dev->markNANDBlockBad && dev->queryNANDBlock) + if (dev->param.write_chunk_tags_fn && + dev->param.read_chunk_tags_fn && + !dev->param.write_chunk_fn && + !dev->param.read_chunk_fn && + dev->param.bad_block_fn && dev->param.query_block_fn) return 1; -#endif /* Can use the "spare" style interface for yaffs1 */ - if (!dev->isYaffs2 && - !dev->writeChunkWithTagsToNAND && - !dev->readChunkWithTagsFromNAND && - dev->writeChunkToNAND && - dev->readChunkFromNAND && - !dev->markNANDBlockBad && !dev->queryNANDBlock) + if (!dev->param.is_yaffs2 && + !dev->param.write_chunk_tags_fn && + !dev->param.read_chunk_tags_fn && + dev->param.write_chunk_fn && + dev->param.read_chunk_fn && + !dev->param.bad_block_fn && !dev->param.query_block_fn) return 1; return 0; /* bad */ } - -static int yaffs_CreateInitialDirectories(yaffs_Device *dev) -{ - /* Initialise the unlinked, deleted, root and lost and found directories */ - - dev->lostNFoundDir = dev->rootDir = NULL; - dev->unlinkedDir = dev->deletedDir = NULL; - - dev->unlinkedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); - - dev->deletedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); - - dev->rootDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT, - YAFFS_ROOT_MODE | S_IFDIR); - dev->lostNFoundDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND, - YAFFS_LOSTNFOUND_MODE | S_IFDIR); - - if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){ - yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir); +static int yaffs_create_initial_dir(struct yaffs_dev *dev) +{ + /* Initialise the unlinked, deleted, root and lost+found directories */ + dev->lost_n_found = dev->root_dir = NULL; + dev->unlinked_dir = dev->del_dir = NULL; + dev->unlinked_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); + dev->del_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); + dev->root_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT, + YAFFS_ROOT_MODE | S_IFDIR); + dev->lost_n_found = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND, + YAFFS_LOSTNFOUND_MODE | S_IFDIR); + + if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir + && dev->del_dir) { + yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found); return YAFFS_OK; } - return YAFFS_FAIL; } -int yaffs_GutsInitialise(yaffs_Device * dev) +int yaffs_guts_initialise(struct yaffs_dev *dev) { int init_failed = 0; unsigned x; int bits; - T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_guts_initialise()"); /* Check stuff that must be set */ if (!dev) { - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Need a device" + ); + return YAFFS_FAIL; + } + + if (dev->is_mounted) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted"); return YAFFS_FAIL; } - dev->internalStartBlock = dev->startBlock; - dev->internalEndBlock = dev->endBlock; - dev->blockOffset = 0; - dev->chunkOffset = 0; - dev->nFreeChunks = 0; + dev->internal_start_block = dev->param.start_block; + dev->internal_end_block = dev->param.end_block; + dev->block_offset = 0; + dev->chunk_offset = 0; + dev->n_free_chunks = 0; + + dev->gc_block = 0; - if (dev->startBlock == 0) { - dev->internalStartBlock = dev->startBlock + 1; - dev->internalEndBlock = dev->endBlock + 1; - dev->blockOffset = 1; - dev->chunkOffset = dev->nChunksPerBlock; + if (dev->param.start_block == 0) { + dev->internal_start_block = dev->param.start_block + 1; + dev->internal_end_block = dev->param.end_block + 1; + dev->block_offset = 1; + dev->chunk_offset = dev->param.chunks_per_block; } /* Check geometry parameters. */ - if ((dev->isYaffs2 && dev->nDataBytesPerChunk < 1024) || - (!dev->isYaffs2 && dev->nDataBytesPerChunk != 512) || - dev->nChunksPerBlock < 2 || - dev->nReservedBlocks < 2 || - dev->internalStartBlock <= 0 || - dev->internalEndBlock <= 0 || - dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small - ) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s " - TENDSTR), dev->nDataBytesPerChunk, dev->isYaffs2 ? "2" : "")); + if ((!dev->param.inband_tags && dev->param.is_yaffs2 && + dev->param.total_bytes_per_chunk < 1024) || + (!dev->param.is_yaffs2 && + dev->param.total_bytes_per_chunk < 512) || + (dev->param.inband_tags && !dev->param.is_yaffs2) || + dev->param.chunks_per_block < 2 || + dev->param.n_reserved_blocks < 2 || + dev->internal_start_block <= 0 || + dev->internal_end_block <= 0 || + dev->internal_end_block <= + (dev->internal_start_block + dev->param.n_reserved_blocks + 2) + ) { + /* otherwise it is too small */ + yaffs_trace(YAFFS_TRACE_ALWAYS, + "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ", + dev->param.total_bytes_per_chunk, + dev->param.is_yaffs2 ? "2" : "", + dev->param.inband_tags); return YAFFS_FAIL; } - if (yaffs_InitialiseNAND(dev) != YAFFS_OK) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: InitialiseNAND failed" TENDSTR))); + if (yaffs_init_nand(dev) != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed"); return YAFFS_FAIL; } + /* Sort out space for inband tags, if required */ + if (dev->param.inband_tags) + dev->data_bytes_per_chunk = + dev->param.total_bytes_per_chunk - + sizeof(struct yaffs_packed_tags2_tags_only); + else + dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk; + /* Got the right mix of functions? */ - if (!yaffs_CheckDevFunctions(dev)) { + if (!yaffs_check_dev_fns(dev)) { /* Function missing */ - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: device function(s) missing or wrong\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "device function(s) missing or wrong"); return YAFFS_FAIL; } - /* This is really a compilation check. */ - if (!yaffs_CheckStructures()) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_CheckStructures failed\n" TENDSTR))); - return YAFFS_FAIL; - } - - if (dev->isMounted) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: device already mounted\n" TENDSTR))); - return YAFFS_FAIL; - } - - /* Finished with most checks. One or two more checks happen later on too. */ - - dev->isMounted = 1; - + /* Finished with most checks. Further checks happen later on too. */ + dev->is_mounted = 1; /* OK now calculate a few things for the device */ /* * Calculate all the chunk size manipulation numbers: */ - /* Start off assuming it is a power of 2 */ - dev->chunkShift = ShiftDiv(dev->nDataBytesPerChunk); - dev->chunkMask = (1<<dev->chunkShift) - 1; - - if(dev->nDataBytesPerChunk == (dev->chunkMask + 1)){ - /* Yes it is a power of 2, disable crumbs */ - dev->crumbMask = 0; - dev->crumbShift = 0; - dev->crumbsPerChunk = 0; - } else { - /* Not a power of 2, use crumbs instead */ - dev->crumbShift = ShiftDiv(sizeof(yaffs_PackedTags2TagsPart)); - dev->crumbMask = (1<<dev->crumbShift)-1; - dev->crumbsPerChunk = dev->nDataBytesPerChunk/(1 << dev->crumbShift); - dev->chunkShift = 0; - dev->chunkMask = 0; - } - + x = dev->data_bytes_per_chunk; + /* We always use dev->chunk_shift and dev->chunk_div */ + dev->chunk_shift = calc_shifts(x); + x >>= dev->chunk_shift; + dev->chunk_div = x; + /* We only use chunk mask if chunk_div is 1 */ + dev->chunk_mask = (1 << dev->chunk_shift) - 1; /* - * Calculate chunkGroupBits. - * We need to find the next power of 2 > than internalEndBlock + * Calculate chunk_grp_bits. + * We need to find the next power of 2 > than internal_end_block */ - x = dev->nChunksPerBlock * (dev->internalEndBlock + 1); + x = dev->param.chunks_per_block * (dev->internal_end_block + 1); - bits = ShiftsGE(x); + bits = calc_shifts_ceiling(x); /* Set up tnode width if wide tnodes are enabled. */ - if(!dev->wideTnodesDisabled){ + if (!dev->param.wide_tnodes_disabled) { /* bits must be even so that we end up with 32-bit words */ - if(bits & 1) + if (bits & 1) bits++; - if(bits < 16) - dev->tnodeWidth = 16; + if (bits < 16) + dev->tnode_width = 16; else - dev->tnodeWidth = bits; + dev->tnode_width = bits; + } else { + dev->tnode_width = 16; } - else - dev->tnodeWidth = 16; - dev->tnodeMask = (1<<dev->tnodeWidth)-1; + dev->tnode_mask = (1 << dev->tnode_width) - 1; /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), * so if the bitwidth of the * chunk range we're using is greater than 16 we need - * to figure out chunk shift and chunkGroupSize + * to figure out chunk shift and chunk_grp_size */ - if (bits <= dev->tnodeWidth) - dev->chunkGroupBits = 0; + if (bits <= dev->tnode_width) + dev->chunk_grp_bits = 0; else - dev->chunkGroupBits = bits - dev->tnodeWidth; + dev->chunk_grp_bits = bits - dev->tnode_width; + dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8; + if (dev->tnode_size < sizeof(struct yaffs_tnode)) + dev->tnode_size = sizeof(struct yaffs_tnode); - dev->chunkGroupSize = 1 << dev->chunkGroupBits; + dev->chunk_grp_size = 1 << dev->chunk_grp_bits; - if (dev->nChunksPerBlock < dev->chunkGroupSize) { + if (dev->param.chunks_per_block < dev->chunk_grp_size) { /* We have a problem because the soft delete won't work if * the chunk group size > chunks per block. * This can be remedied by using larger "virtual blocks". */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: chunk group too large\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large"); return YAFFS_FAIL; } - /* OK, we've finished verifying the device, lets continue with initialisation */ + /* Finished verifying the device, continue with initialisation */ /* More device initialisation */ - dev->garbageCollections = 0; - dev->passiveGarbageCollections = 0; - dev->currentDirtyChecker = 0; - dev->bufferedBlock = -1; - dev->doingBufferedBlockRewrite = 0; - dev->nDeletedFiles = 0; - dev->nBackgroundDeletions = 0; - dev->nUnlinkedFiles = 0; - dev->eccFixed = 0; - dev->eccUnfixed = 0; - dev->tagsEccFixed = 0; - dev->tagsEccUnfixed = 0; - dev->nErasureFailures = 0; - dev->nErasedBlocks = 0; - dev->isDoingGC = 0; - dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */ + dev->all_gcs = 0; + dev->passive_gc_count = 0; + dev->oldest_dirty_gc_count = 0; + dev->bg_gcs = 0; + dev->gc_block_finder = 0; + dev->buffered_block = -1; + dev->doing_buffered_block_rewrite = 0; + dev->n_deleted_files = 0; + dev->n_bg_deletions = 0; + dev->n_unlinked_files = 0; + dev->n_ecc_fixed = 0; + dev->n_ecc_unfixed = 0; + dev->n_tags_ecc_fixed = 0; + dev->n_tags_ecc_unfixed = 0; + dev->n_erase_failures = 0; + dev->n_erased_blocks = 0; + dev->gc_disable = 0; + dev->has_pending_prioritised_gc = 1; + /* Assume the worst for now, will get fixed on first GC */ + INIT_LIST_HEAD(&dev->dirty_dirs); + dev->oldest_dirty_seq = 0; + dev->oldest_dirty_block = 0; /* Initialise temporary buffers and caches. */ - if(!yaffs_InitialiseTempBuffers(dev)) + if (!yaffs_init_tmp_buffers(dev)) init_failed = 1; - dev->srCache = NULL; - dev->gcCleanupList = NULL; + dev->cache = NULL; + dev->gc_cleanup_list = NULL; - - if (!init_failed && - dev->nShortOpCaches > 0) { + if (!init_failed && dev->param.n_caches > 0) { int i; - __u8 *buf; - int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache); + void *buf; + int cache_bytes = + dev->param.n_caches * sizeof(struct yaffs_cache); - if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) { - dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES; - } + if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES) + dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES; - dev->srCache = YMALLOC(srCacheBytes); - buf = (__u8 *)dev->srCache; + dev->cache = kmalloc(cache_bytes, GFP_NOFS); - if(dev->srCache) - memset(dev->srCache,0,srCacheBytes); + buf = (u8 *) dev->cache; - for (i = 0; i < dev->nShortOpCaches && buf; i++) { - dev->srCache[i].object = NULL; - dev->srCache[i].lastUse = 0; - dev->srCache[i].dirty = 0; - dev->srCache[i].data = buf = YMALLOC_DMA(dev->nDataBytesPerChunk); + if (dev->cache) + memset(dev->cache, 0, cache_bytes); + + for (i = 0; i < dev->param.n_caches && buf; i++) { + dev->cache[i].object = NULL; + dev->cache[i].last_use = 0; + dev->cache[i].dirty = 0; + dev->cache[i].data = buf = + kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); } - if(!buf) + if (!buf) init_failed = 1; - dev->srLastUse = 0; + dev->cache_last_use = 0; } - dev->cacheHits = 0; + dev->cache_hits = 0; - if(!init_failed){ - dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32)); - if(!dev->gcCleanupList) + if (!init_failed) { + dev->gc_cleanup_list = + kmalloc(dev->param.chunks_per_block * sizeof(u32), + GFP_NOFS); + if (!dev->gc_cleanup_list) init_failed = 1; } - if (dev->isYaffs2) { - dev->useHeaderFileSize = 1; - } - if(!init_failed && !yaffs_InitialiseBlocks(dev)) + if (dev->param.is_yaffs2) + dev->param.use_header_file_size = 1; + + if (!init_failed && !yaffs_init_blocks(dev)) init_failed = 1; - yaffs_InitialiseTnodes(dev); - yaffs_InitialiseObjects(dev); + yaffs_init_tnodes_and_objs(dev); - if(!init_failed && !yaffs_CreateInitialDirectories(dev)) + if (!init_failed && !yaffs_create_initial_dir(dev)) init_failed = 1; + if (!init_failed && dev->param.is_yaffs2 && + !dev->param.disable_summary && + !yaffs_summary_init(dev)) + init_failed = 1; - if(!init_failed){ + if (!init_failed) { /* Now scan the flash. */ - if (dev->isYaffs2) { - if(yaffs_CheckpointRestore(dev)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: restored from checkpoint" TENDSTR))); + if (dev->param.is_yaffs2) { + if (yaffs2_checkpt_restore(dev)) { + yaffs_check_obj_details_loaded(dev->root_dir); + yaffs_trace(YAFFS_TRACE_CHECKPOINT | + YAFFS_TRACE_MOUNT, + "yaffs: restored from checkpoint" + ); } else { - /* Clean up the mess caused by an aborted checkpoint load - * and scan backwards. + /* Clean up the mess caused by an aborted + * checkpoint load then scan backwards. */ - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); + yaffs_deinit_blocks(dev); + yaffs_deinit_tnodes_and_objs(dev); - dev->nErasedBlocks = 0; - dev->nFreeChunks = 0; - dev->allocationBlock = -1; - dev->allocationPage = -1; - dev->nDeletedFiles = 0; - dev->nUnlinkedFiles = 0; - dev->nBackgroundDeletions = 0; - dev->oldestDirtySequence = 0; + dev->n_erased_blocks = 0; + dev->n_free_chunks = 0; + dev->alloc_block = -1; + dev->alloc_page = -1; + dev->n_deleted_files = 0; + dev->n_unlinked_files = 0; + dev->n_bg_deletions = 0; - if(!init_failed && !yaffs_InitialiseBlocks(dev)) + if (!init_failed && !yaffs_init_blocks(dev)) init_failed = 1; - yaffs_InitialiseTnodes(dev); - yaffs_InitialiseObjects(dev); + yaffs_init_tnodes_and_objs(dev); - if(!init_failed && !yaffs_CreateInitialDirectories(dev)) + if (!init_failed + && !yaffs_create_initial_dir(dev)) init_failed = 1; - if(!init_failed && !yaffs_ScanBackwards(dev)) + if (!init_failed && !yaffs2_scan_backwards(dev)) init_failed = 1; } - }else - if(!yaffs_Scan(dev)) - init_failed = 1; + } else if (!yaffs1_scan(dev)) { + init_failed = 1; + } + + yaffs_strip_deleted_objs(dev); + yaffs_fix_hanging_objs(dev); + if (dev->param.empty_lost_n_found) + yaffs_empty_l_n_f(dev); } - if(init_failed){ + if (init_failed) { /* Clean up the mess */ - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: yaffs_guts_initialise() aborted."); - yaffs_Deinitialise(dev); + yaffs_deinitialise(dev); return YAFFS_FAIL; } /* Zero out stats */ - dev->nPageReads = 0; - dev->nPageWrites = 0; - dev->nBlockErasures = 0; - dev->nGCCopies = 0; - dev->nRetriedWrites = 0; + dev->n_page_reads = 0; + dev->n_page_writes = 0; + dev->n_erasures = 0; + dev->n_gc_copies = 0; + dev->n_retried_writes = 0; - dev->nRetiredBlocks = 0; + dev->n_retired_blocks = 0; - yaffs_VerifyFreeChunks(dev); - yaffs_VerifyBlocks(dev); + yaffs_verify_free_chunks(dev); + yaffs_verify_blocks(dev); + /* Clean up any aborted checkpoint data */ + if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0) + yaffs2_checkpt_invalidate(dev); - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: yaffs_guts_initialise() done."); return YAFFS_OK; - } -void yaffs_Deinitialise(yaffs_Device * dev) +void yaffs_deinitialise(struct yaffs_dev *dev) { - if (dev->isMounted) { + if (dev->is_mounted) { int i; - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); - if (dev->nShortOpCaches > 0 && - dev->srCache) { + yaffs_deinit_blocks(dev); + yaffs_deinit_tnodes_and_objs(dev); + yaffs_summary_deinit(dev); + + if (dev->param.n_caches > 0 && dev->cache) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if(dev->srCache[i].data) - YFREE(dev->srCache[i].data); - dev->srCache[i].data = NULL; + for (i = 0; i < dev->param.n_caches; i++) { + kfree(dev->cache[i].data); + dev->cache[i].data = NULL; } - YFREE(dev->srCache); - dev->srCache = NULL; + kfree(dev->cache); + dev->cache = NULL; } - YFREE(dev->gcCleanupList); + kfree(dev->gc_cleanup_list); - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - YFREE(dev->tempBuffer[i].buffer); - } + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) + kfree(dev->temp_buffer[i].buffer); - dev->isMounted = 0; - } + dev->is_mounted = 0; + if (dev->param.deinitialise_flash_fn) + dev->param.deinitialise_flash_fn(dev); + } } -static int yaffs_CountFreeChunks(yaffs_Device * dev) +int yaffs_count_free_chunks(struct yaffs_dev *dev) { - int nFree; + int n_free = 0; int b; + struct yaffs_block_info *blk; - yaffs_BlockInfo *blk; - - for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock; - b++) { - blk = yaffs_GetBlockInfo(dev, b); - - switch (blk->blockState) { + blk = dev->block_info; + for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { + switch (blk->block_state) { case YAFFS_BLOCK_STATE_EMPTY: case YAFFS_BLOCK_STATE_ALLOCATING: case YAFFS_BLOCK_STATE_COLLECTING: case YAFFS_BLOCK_STATE_FULL: - nFree += - (dev->nChunksPerBlock - blk->pagesInUse + - blk->softDeletions); + n_free += + (dev->param.chunks_per_block - blk->pages_in_use + + blk->soft_del_pages); break; default: break; } - + blk++; } - - return nFree; + return n_free; } -int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev) +int yaffs_get_n_free_chunks(struct yaffs_dev *dev) { /* This is what we report to the outside world */ + int n_free; + int n_dirty_caches; + int blocks_for_checkpt; + int i; - int nFree; - int nDirtyCacheChunks; - int blocksForCheckpoint; - -#if 1 - nFree = dev->nFreeChunks; -#else - nFree = yaffs_CountFreeChunks(dev); -#endif - - nFree += dev->nDeletedFiles; + n_free = dev->n_free_chunks; + n_free += dev->n_deleted_files; - /* Now count the number of dirty chunks in the cache and subtract those */ + /* Now count and subtract the number of dirty chunks in the cache. */ - { - int i; - for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].dirty) - nDirtyCacheChunks++; - } + for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].dirty) + n_dirty_caches++; } - nFree -= nDirtyCacheChunks; - - nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock); + n_free -= n_dirty_caches; - /* Now we figure out how much to reserve for the checkpoint and report that... */ - blocksForCheckpoint = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint; - if(blocksForCheckpoint < 0) - blocksForCheckpoint = 0; + n_free -= + ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block); - nFree -= (blocksForCheckpoint * dev->nChunksPerBlock); + /* Now figure checkpoint space and report that... */ + blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev); - if (nFree < 0) - nFree = 0; + n_free -= (blocks_for_checkpt * dev->param.chunks_per_block); - return nFree; + if (n_free < 0) + n_free = 0; + return n_free; } -static int yaffs_freeVerificationFailures; - -static void yaffs_VerifyFreeChunks(yaffs_Device * dev) +/*\ + * Marshalling functions to get loff_t file sizes into aand out of + * object headers. + */ +void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize) { - int counted; - int difference; - - if(yaffs_SkipVerification(dev)) - return; - - counted = yaffs_CountFreeChunks(dev); - - difference = dev->nFreeChunks - counted; - - if (difference) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("Freechunks verification failure %d %d %d" TENDSTR), - dev->nFreeChunks, counted, difference)); - yaffs_freeVerificationFailures++; - } + oh->file_size_low = (fsize & 0xFFFFFFFF); + oh->file_size_high = ((fsize >> 32) & 0xFFFFFFFF); } -/*---------------------------------------- YAFFS test code ----------------------*/ - -#define yaffs_CheckStruct(structure,syze, name) \ - if(sizeof(structure) != syze) \ - { \ - T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\ - name,syze,sizeof(structure))); \ - return YAFFS_FAIL; \ - } - -static int yaffs_CheckStructures(void) +loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh) { -/* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags") */ -/* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion") */ -/* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare") */ -#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG - yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode") -#endif - yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader") + loff_t retval; + + if (~(oh->file_size_high)) + retval = (((loff_t) oh->file_size_high) << 32) | + (((loff_t) oh->file_size_low) & 0xFFFFFFFF); + else + retval = (loff_t) oh->file_size_low; - return YAFFS_OK; + return retval; } diff --git a/fs/yaffs2/yaffs_guts.h b/fs/yaffs2/yaffs_guts.h index 1f75efd..e3558c5 100644 --- a/fs/yaffs2/yaffs_guts.h +++ b/fs/yaffs2/yaffs_guts.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -16,7 +16,6 @@ #ifndef __YAFFS_GUTS_H__ #define __YAFFS_GUTS_H__ -#include "devextras.h" #include "yportenv.h" #define YAFFS_OK 1 @@ -24,35 +23,48 @@ /* Give us a Y=0x59, * Give us an A=0x41, - * Give us an FF=0xFF + * Give us an FF=0xff * Give us an S=0x53 * And what have we got... */ -#define YAFFS_MAGIC 0x5941FF53 +#define YAFFS_MAGIC 0x5941ff53 -#define YAFFS_NTNODES_LEVEL0 16 +/* + * Tnodes form a tree with the tnodes in "levels" + * Levels greater than 0 hold 8 slots which point to other tnodes. + * Those at level 0 hold 16 slots which point to chunks in NAND. + * + * A maximum level of 8 thust supports files of size up to: + * + * 2^(3*MAX_LEVEL+4) + * + * Thus a max level of 8 supports files with up to 2^^28 chunks which gives + * a maximum file size of arounf 51Gbytees with 2k chunks. + */ +#define YAFFS_NTNODES_LEVEL0 16 #define YAFFS_TNODES_LEVEL0_BITS 4 #define YAFFS_TNODES_LEVEL0_MASK 0xf -#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2) -#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1) +#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2) +#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1) #define YAFFS_TNODES_INTERNAL_MASK 0x7 -#define YAFFS_TNODES_MAX_LEVEL 6 +#define YAFFS_TNODES_MAX_LEVEL 8 +#define YAFFS_TNODES_MAX_BITS (YAFFS_TNODES_LEVEL0_BITS + \ + YAFFS_TNODES_INTERNAL_BITS * \ + YAFFS_TNODES_MAX_LEVEL) +#define YAFFS_MAX_CHUNK_ID ((1 << YAFFS_TNODES_MAX_BITS) - 1) -#ifndef CONFIG_YAFFS_NO_YAFFS1 +/* Constants for YAFFS1 mode */ #define YAFFS_BYTES_PER_SPARE 16 #define YAFFS_BYTES_PER_CHUNK 512 #define YAFFS_CHUNK_SIZE_SHIFT 9 #define YAFFS_CHUNKS_PER_BLOCK 32 -#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK) -#endif +#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK) -#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024 +#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024 #define YAFFS_MIN_YAFFS2_SPARE_SIZE 32 -#define YAFFS_MAX_CHUNK_ID 0x000FFFFF -#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF #define YAFFS_ALLOCATION_NOBJECTS 100 #define YAFFS_ALLOCATION_NTNODES 100 @@ -60,10 +72,12 @@ #define YAFFS_NOBJECT_BUCKETS 256 - #define YAFFS_OBJECT_SPACE 0x40000 +#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE - 1) -#define YAFFS_CHECKPOINT_VERSION 3 +/* Binary data version stamps */ +#define YAFFS_SUMMARY_VERSION 1 +#define YAFFS_CHECKPOINT_VERSION 6 #ifdef CONFIG_YAFFS_UNICODE #define YAFFS_MAX_NAME_LENGTH 127 @@ -81,16 +95,16 @@ #define YAFFS_OBJECTID_UNLINKED 3 #define YAFFS_OBJECTID_DELETED 4 -/* Sseudo object ids for checkpointing */ -#define YAFFS_OBJECTID_SB_HEADER 0x10 -#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20 -#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21 +/* Fake object Id for summary data */ +#define YAFFS_OBJECTID_SUMMARY 0x10 -/* */ +/* Pseudo object ids for checkpointing */ +#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20 +#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21 #define YAFFS_MAX_SHORT_OP_CACHES 20 -#define YAFFS_N_TEMP_BUFFERS 4 +#define YAFFS_N_TEMP_BUFFERS 6 /* We limit the number attempts at sucessfully saving a chunk of data. * Small-page devices have 32 pages per block; large-page devices have 64. @@ -102,142 +116,136 @@ * The range is limited slightly to help distinguish bad numbers from good. * This also allows us to perhaps in the future use special numbers for * special purposes. - * EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years, + * EFFFFF00 allows the allocation of 8 blocks/second (~1Mbytes) for 15 years, * and is a larger number than the lifetime of a 2GB device. */ #define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000 -#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00 +#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xefffff00 + +/* Special sequence number for bad block that failed to be marked bad */ +#define YAFFS_SEQUENCE_BAD_BLOCK 0xffff0000 /* ChunkCache is used for short read/write operations.*/ -typedef struct { - struct yaffs_ObjectStruct *object; - int chunkId; - int lastUse; +struct yaffs_cache { + struct yaffs_obj *object; + int chunk_id; + int last_use; int dirty; - int nBytes; /* Only valid if the cache is dirty */ + int n_bytes; /* Only valid if the cache is dirty */ int locked; /* Can't push out or flush while locked. */ -#ifdef CONFIG_YAFFS_YAFFS2 - __u8 *data; -#else - __u8 data[YAFFS_BYTES_PER_CHUNK]; -#endif -} yaffs_ChunkCache; - - + u8 *data; +}; -/* Tags structures in RAM - * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise - * the structure size will get blown out. +/* yaffs1 tags structures in RAM + * NB This uses bitfield. Bitfields should not straddle a u32 boundary + * otherwise the structure size will get blown out. */ -#ifndef CONFIG_YAFFS_NO_YAFFS1 -typedef struct { - unsigned chunkId:20; - unsigned serialNumber:2; - unsigned byteCount:10; - unsigned objectId:18; +struct yaffs_tags { + unsigned chunk_id:20; + unsigned serial_number:2; + unsigned n_bytes_lsb:10; + unsigned obj_id:18; unsigned ecc:12; - unsigned unusedStuff:2; - -} yaffs_Tags; + unsigned n_bytes_msb:2; +}; -typedef union { - yaffs_Tags asTags; - __u8 asBytes[8]; -} yaffs_TagsUnion; +union yaffs_tags_union { + struct yaffs_tags as_tags; + u8 as_bytes[8]; +}; -#endif /* Stuff used for extended tags in YAFFS2 */ -typedef enum { +enum yaffs_ecc_result { YAFFS_ECC_RESULT_UNKNOWN, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_ECC_RESULT_FIXED, YAFFS_ECC_RESULT_UNFIXED -} yaffs_ECCResult; +}; -typedef enum { +enum yaffs_obj_type { YAFFS_OBJECT_TYPE_UNKNOWN, YAFFS_OBJECT_TYPE_FILE, YAFFS_OBJECT_TYPE_SYMLINK, YAFFS_OBJECT_TYPE_DIRECTORY, YAFFS_OBJECT_TYPE_HARDLINK, YAFFS_OBJECT_TYPE_SPECIAL -} yaffs_ObjectType; +}; #define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL -typedef struct { - - unsigned validMarker0; - unsigned chunkUsed; /* Status of the chunk: used or unused */ - unsigned objectId; /* If 0 then this is not part of an object (unused) */ - unsigned chunkId; /* If 0 then this is a header, else a data chunk */ - unsigned byteCount; /* Only valid for data chunks */ +struct yaffs_ext_tags { + unsigned chunk_used; /* Status of the chunk: used or unused */ + unsigned obj_id; /* If 0 this is not used */ + unsigned chunk_id; /* If 0 this is a header, else a data chunk */ + unsigned n_bytes; /* Only valid for data chunks */ /* The following stuff only has meaning when we read */ - yaffs_ECCResult eccResult; - unsigned blockBad; + enum yaffs_ecc_result ecc_result; + unsigned block_bad; /* YAFFS 1 stuff */ - unsigned chunkDeleted; /* The chunk is marked deleted */ - unsigned serialNumber; /* Yaffs1 2-bit serial number */ + unsigned is_deleted; /* The chunk is marked deleted */ + unsigned serial_number; /* Yaffs1 2-bit serial number */ /* YAFFS2 stuff */ - unsigned sequenceNumber; /* The sequence number of this block */ + unsigned seq_number; /* The sequence number of this block */ /* Extra info if this is an object header (YAFFS2 only) */ - unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */ - unsigned extraParentObjectId; /* The parent object */ - unsigned extraIsShrinkHeader; /* Is it a shrink header? */ - unsigned extraShadows; /* Does this shadow another object? */ - - yaffs_ObjectType extraObjectType; /* What object type? */ + unsigned extra_available; /* Extra info available if not zero */ + unsigned extra_parent_id; /* The parent object */ + unsigned extra_is_shrink; /* Is it a shrink header? */ + unsigned extra_shadows; /* Does this shadow another object? */ - unsigned extraFileLength; /* Length if it is a file */ - unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */ + enum yaffs_obj_type extra_obj_type; /* What object type? */ - unsigned validMarker1; - -} yaffs_ExtendedTags; + loff_t extra_file_size; /* Length if it is a file */ + unsigned extra_equiv_id; /* Equivalent object for a hard link */ +}; /* Spare structure for YAFFS1 */ -typedef struct { - __u8 tagByte0; - __u8 tagByte1; - __u8 tagByte2; - __u8 tagByte3; - __u8 pageStatus; /* set to 0 to delete the chunk */ - __u8 blockStatus; - __u8 tagByte4; - __u8 tagByte5; - __u8 ecc1[3]; - __u8 tagByte6; - __u8 tagByte7; - __u8 ecc2[3]; -} yaffs_Spare; +struct yaffs_spare { + u8 tb0; + u8 tb1; + u8 tb2; + u8 tb3; + u8 page_status; /* set to 0 to delete the chunk */ + u8 block_status; + u8 tb4; + u8 tb5; + u8 ecc1[3]; + u8 tb6; + u8 tb7; + u8 ecc2[3]; +}; /*Special structure for passing through to mtd */ -struct yaffs_NANDSpare { - yaffs_Spare spare; +struct yaffs_nand_spare { + struct yaffs_spare spare; int eccres1; int eccres2; }; /* Block data in RAM */ -typedef enum { +enum yaffs_block_state { YAFFS_BLOCK_STATE_UNKNOWN = 0, YAFFS_BLOCK_STATE_SCANNING, - YAFFS_BLOCK_STATE_NEEDS_SCANNING, - /* The block might have something on it (ie it is allocating or full, perhaps empty) - * but it needs to be scanned to determine its true state. - * This state is only valid during yaffs_Scan. - * NB We tolerate empty because the pre-scanner might be incapable of deciding - * However, if this state is returned on a YAFFS2 device, then we expect a sequence number + /* Being scanned */ + + YAFFS_BLOCK_STATE_NEEDS_SCAN, + /* The block might have something on it (ie it is allocating or full, + * perhaps empty) but it needs to be scanned to determine its true + * state. + * This state is only valid during scanning. + * NB We tolerate empty because the pre-scanner might be incapable of + * deciding + * However, if this state is returned on a YAFFS2 device, + * then we expect a sequence number */ YAFFS_BLOCK_STATE_EMPTY, @@ -247,123 +255,109 @@ typedef enum { /* This block is partially allocated. * At least one page holds valid data. * This is the one currently being used for page - * allocation. Should never be more than one of these + * allocation. Should never be more than one of these. + * If a block is only partially allocated at mount it is treated as + * full. */ YAFFS_BLOCK_STATE_FULL, /* All the pages in this block have been allocated. + * If a block was only partially allocated when mounted we treat + * it as fully allocated. */ YAFFS_BLOCK_STATE_DIRTY, - /* All pages have been allocated and deleted. + /* The block was full and now all chunks have been deleted. * Erase me, reuse me. */ YAFFS_BLOCK_STATE_CHECKPOINT, - /* This block is assigned to holding checkpoint data. - */ + /* This block is assigned to holding checkpoint data. */ YAFFS_BLOCK_STATE_COLLECTING, /* This block is being garbage collected */ YAFFS_BLOCK_STATE_DEAD - /* This block has failed and is not in use */ -} yaffs_BlockState; + /* This block has failed and is not in use */ +}; #define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1) +struct yaffs_block_info { + + int soft_del_pages:10; /* number of soft deleted pages */ + int pages_in_use:10; /* number of pages in use */ + unsigned block_state:4; /* One of the above block states. */ + /* NB use unsigned because enum is sometimes + * an int */ + u32 needs_retiring:1; /* Data has failed on this block, */ + /*need to get valid data off and retire*/ + u32 skip_erased_check:1;/* Skip the erased check on this block */ + u32 gc_prioritise:1; /* An ECC check or blank check has failed. + Block should be prioritised for GC */ + u32 chunk_error_strikes:3; /* How many times we've had ecc etc + failures on this block and tried to reuse it */ + u32 has_summary:1; /* The block has a summary */ + + u32 has_shrink_hdr:1; /* This block has at least one shrink header */ + u32 seq_number; /* block sequence number for yaffs2 */ -typedef struct { - - int softDeletions:10; /* number of soft deleted pages */ - int pagesInUse:10; /* number of pages in use */ - unsigned blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */ - __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */ - /* and retire the block. */ - __u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */ - __u32 gcPrioritise: 1; /* An ECC check or blank check has failed on this block. - It should be prioritised for GC */ - __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */ - -#ifdef CONFIG_YAFFS_YAFFS2 - __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */ - __u32 sequenceNumber; /* block sequence number for yaffs2 */ -#endif - -} yaffs_BlockInfo; +}; /* -------------------------- Object structure -------------------------------*/ /* This is the object structure as stored on NAND */ -typedef struct { - yaffs_ObjectType type; +struct yaffs_obj_hdr { + enum yaffs_obj_type type; /* Apply to everything */ - int parentObjectId; - __u16 sum__NoLongerUsed; /* checksum of name. No longer used */ + int parent_obj_id; + u16 sum_no_longer_used; /* checksum of name. No longer used */ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - /* Thes following apply to directories, files, symlinks - not hard links */ - __u32 yst_mode; /* protection */ + /* The following apply to all object types except for hard links */ + u32 yst_mode; /* protection */ -#ifdef CONFIG_YAFFS_WINCE - __u32 notForWinCE[5]; -#else - __u32 yst_uid; - __u32 yst_gid; - __u32 yst_atime; - __u32 yst_mtime; - __u32 yst_ctime; -#endif + u32 yst_uid; + u32 yst_gid; + u32 yst_atime; + u32 yst_mtime; + u32 yst_ctime; /* File size applies to files only */ - int fileSize; + u32 file_size_low; /* Equivalent object id applies to hard links only. */ - int equivalentObjectId; + int equiv_id; /* Alias is for symlinks only. */ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1]; - __u32 yst_rdev; /* device stuff for block and char devices (major/min) */ + u32 yst_rdev; /* stuff for block and char devices (major/min) */ -#ifdef CONFIG_YAFFS_WINCE - __u32 win_ctime[2]; - __u32 win_atime[2]; - __u32 win_mtime[2]; - __u32 roomToGrow[4]; -#else - __u32 roomToGrow[10]; -#endif - - int shadowsObject; /* This object header shadows the specified object if > 0 */ + u32 win_ctime[2]; + u32 win_atime[2]; + u32 win_mtime[2]; - /* isShrink applies to object headers written when we shrink the file (ie resize) */ - __u32 isShrink; + u32 inband_shadowed_obj_id; + u32 inband_is_shrink; -} yaffs_ObjectHeader; + u32 file_size_high; + u32 reserved[1]; + int shadows_obj; /* This object header shadows the + specified object if > 0 */ -/*--------------------------- Tnode -------------------------- */ - -union yaffs_Tnode_union { -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1]; -#else - union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL]; -#endif -/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */ + /* is_shrink applies to object headers written when wemake a hole. */ + u32 is_shrink; }; -typedef union yaffs_Tnode_union yaffs_Tnode; +/*--------------------------- Tnode -------------------------- */ -struct yaffs_TnodeList_struct { - struct yaffs_TnodeList_struct *next; - yaffs_Tnode *tnodes; +struct yaffs_tnode { + struct yaffs_tnode *internal[YAFFS_NTNODES_INTERNAL]; }; -typedef struct yaffs_TnodeList_struct yaffs_TnodeList; - /*------------------------ Object -----------------------------*/ /* An object can be one of: * - a directory (no data, has children links @@ -372,537 +366,608 @@ typedef struct yaffs_TnodeList_struct yaffs_TnodeList; * - a hard link */ -typedef struct { - __u32 fileSize; - __u32 scannedFileSize; - __u32 shrinkSize; - int topLevel; - yaffs_Tnode *top; -} yaffs_FileStructure; +struct yaffs_file_var { + loff_t file_size; + loff_t scanned_size; + loff_t shrink_size; + int top_level; + struct yaffs_tnode *top; +}; -typedef struct { +struct yaffs_dir_var { struct list_head children; /* list of child links */ -} yaffs_DirectoryStructure; + struct list_head dirty; /* Entry for list of dirty directories */ +}; -typedef struct { +struct yaffs_symlink_var { YCHAR *alias; -} yaffs_SymLinkStructure; - -typedef struct { - struct yaffs_ObjectStruct *equivalentObject; - __u32 equivalentObjectId; -} yaffs_HardLinkStructure; - -typedef union { - yaffs_FileStructure fileVariant; - yaffs_DirectoryStructure directoryVariant; - yaffs_SymLinkStructure symLinkVariant; - yaffs_HardLinkStructure hardLinkVariant; -} yaffs_ObjectVariant; - -struct yaffs_ObjectStruct { - __u8 deleted:1; /* This should only apply to unlinked files. */ - __u8 softDeleted:1; /* it has also been soft deleted */ - __u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/ - __u8 fake:1; /* A fake object has no presence on NAND. */ - __u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */ - __u8 unlinkAllowed:1; - __u8 dirty:1; /* the object needs to be written to flash */ - __u8 valid:1; /* When the file system is being loaded up, this +}; + +struct yaffs_hardlink_var { + struct yaffs_obj *equiv_obj; + u32 equiv_id; +}; + +union yaffs_obj_var { + struct yaffs_file_var file_variant; + struct yaffs_dir_var dir_variant; + struct yaffs_symlink_var symlink_variant; + struct yaffs_hardlink_var hardlink_variant; +}; + +struct yaffs_obj { + u8 deleted:1; /* This should only apply to unlinked files. */ + u8 soft_del:1; /* it has also been soft deleted */ + u8 unlinked:1; /* An unlinked file.*/ + u8 fake:1; /* A fake object has no presence on NAND. */ + u8 rename_allowed:1; /* Some objects cannot be renamed. */ + u8 unlink_allowed:1; + u8 dirty:1; /* the object needs to be written to flash */ + u8 valid:1; /* When the file system is being loaded up, this * object might be created before the data - * is available (ie. file data records appear before the header). + * is available + * ie. file data chunks encountered before + * the header. */ - __u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */ + u8 lazy_loaded:1; /* This object has been lazy loaded and + * is missing some detail */ - __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is - * still in the inode cache. Free of object is defered. + u8 defered_free:1; /* Object is removed from NAND, but is + * still in the inode cache. + * Free of object is defered. * until the inode is released. */ + u8 being_created:1; /* This object is still being created + * so skip some verification checks. */ + u8 is_shadowed:1; /* This object is shadowed on the way + * to being renamed. */ - __u8 serial; /* serial number of chunk in NAND. Cached here */ - __u16 sum; /* sum of the name to speed searching */ + u8 xattr_known:1; /* We know if this has object has xattribs + * or not. */ + u8 has_xattr:1; /* This object has xattribs. + * Only valid if xattr_known. */ - struct yaffs_DeviceStruct *myDev; /* The device I'm on */ + u8 serial; /* serial number of chunk in NAND.*/ + u16 sum; /* sum of the name to speed searching */ - struct list_head hashLink; /* list of objects in this hash bucket */ + struct yaffs_dev *my_dev; /* The device I'm on */ - struct list_head hardLinks; /* all the equivalent hard linked objects */ + struct list_head hash_link; /* list of objects in hash bucket */ + + struct list_head hard_links; /* hard linked object chain*/ /* directory structure stuff */ /* also used for linking up the free list */ - struct yaffs_ObjectStruct *parent; + struct yaffs_obj *parent; struct list_head siblings; /* Where's my object header in NAND? */ - int chunkId; + int hdr_chunk; - int nDataChunks; /* Number of data chunks attached to the file. */ + int n_data_chunks; /* Number of data chunks for this file. */ - __u32 objectId; /* the object id value */ + u32 obj_id; /* the object id value */ - __u32 yst_mode; + u32 yst_mode; -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1]; -#endif - -/* XXX U-BOOT XXX */ -/* #ifndef __KERNEL__ */ - __u32 inUse; -/* #endif */ + YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1]; #ifdef CONFIG_YAFFS_WINCE - __u32 win_ctime[2]; - __u32 win_mtime[2]; - __u32 win_atime[2]; + u32 win_ctime[2]; + u32 win_mtime[2]; + u32 win_atime[2]; #else - __u32 yst_uid; - __u32 yst_gid; - __u32 yst_atime; - __u32 yst_mtime; - __u32 yst_ctime; + u32 yst_uid; + u32 yst_gid; + u32 yst_atime; + u32 yst_mtime; + u32 yst_ctime; #endif - __u32 yst_rdev; + u32 yst_rdev; -/* XXX U-BOOT XXX */ -/* #ifndef __KERNEL__ */ - struct inode *myInode; -/* #endif */ + void *my_inode; - yaffs_ObjectType variantType; + enum yaffs_obj_type variant_type; - yaffs_ObjectVariant variant; + union yaffs_obj_var variant; }; -typedef struct yaffs_ObjectStruct yaffs_Object; - -struct yaffs_ObjectList_struct { - yaffs_Object *objects; - struct yaffs_ObjectList_struct *next; -}; - -typedef struct yaffs_ObjectList_struct yaffs_ObjectList; - -typedef struct { +struct yaffs_obj_bucket { struct list_head list; int count; -} yaffs_ObjectBucket; - +}; -/* yaffs_CheckpointObject holds the definition of an object as dumped +/* yaffs_checkpt_obj holds the definition of an object as dumped * by checkpointing. */ -typedef struct { - int structType; - __u32 objectId; - __u32 parentId; - int chunkId; - - yaffs_ObjectType variantType:3; - __u8 deleted:1; - __u8 softDeleted:1; - __u8 unlinked:1; - __u8 fake:1; - __u8 renameAllowed:1; - __u8 unlinkAllowed:1; - __u8 serial; - - int nDataChunks; - __u32 fileSizeOrEquivalentObjectId; - -}yaffs_CheckpointObject; +struct yaffs_checkpt_obj { + int struct_type; + u32 obj_id; + u32 parent_id; + int hdr_chunk; + enum yaffs_obj_type variant_type:3; + u8 deleted:1; + u8 soft_del:1; + u8 unlinked:1; + u8 fake:1; + u8 rename_allowed:1; + u8 unlink_allowed:1; + u8 serial; + int n_data_chunks; + loff_t size_or_equiv_obj; +}; /*--------------------- Temporary buffers ---------------- * - * These are chunk-sized working buffers. Each device has a few + * These are chunk-sized working buffers. Each device has a few. */ -typedef struct { - __u8 *buffer; - int line; /* track from whence this buffer was allocated */ - int maxLine; -} yaffs_TempBuffer; +struct yaffs_buffer { + u8 *buffer; + int in_use; +}; /*----------------- Device ---------------------------------*/ -struct yaffs_DeviceStruct { - struct list_head devList; - const char *name; - - /* Entry parameters set up way early. Yaffs sets up the rest.*/ - int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */ - int nChunksPerBlock; /* does not need to be a power of 2 */ - int nBytesPerSpare; /* spare area size */ - int startBlock; /* Start block we're allowed to use */ - int endBlock; /* End block we're allowed to use */ - int nReservedBlocks; /* We want this tuneable so that we can reduce */ - /* reserved blocks on NOR and RAM. */ - - - /* Stuff used by the shared space checkpointing mechanism */ - /* If this value is zero, then this mechanism is disabled */ - - int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */ - - +struct yaffs_param { + const YCHAR *name; + /* + * Entry parameters set up way early. Yaffs sets up the rest. + * The structure should be zeroed out before use so that unused + * and defualt values are zero. + */ - int nShortOpCaches; /* If <= 0, then short op caching is disabled, else - * the number of short op caches (don't use too many) + int inband_tags; /* Use unband tags */ + u32 total_bytes_per_chunk; /* Should be >= 512, does not need to + be a power of 2 */ + int chunks_per_block; /* does not need to be a power of 2 */ + int spare_bytes_per_chunk; /* spare area size */ + int start_block; /* Start block we're allowed to use */ + int end_block; /* End block we're allowed to use */ + int n_reserved_blocks; /* Tuneable so that we can reduce + * reserved blocks on NOR and RAM. */ + + int n_caches; /* If <= 0, then short op caching is disabled, + * else the number of short op caches. */ + int use_nand_ecc; /* Flag to decide whether or not to use + * NAND driver ECC on data (yaffs1) */ + int tags_9bytes; /* Use 9 byte tags */ + int no_tags_ecc; /* Flag to decide whether or not to do ECC + * on packed tags (yaffs2) */ - int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */ - - int useNANDECC; /* Flag to decide whether or not to use NANDECC */ + int is_yaffs2; /* Use yaffs2 mode on this device */ - void *genericDevice; /* Pointer to device context - * On an mtd this holds the mtd pointer. - */ - void *superBlock; - - /* NAND access functions (Must be set before calling YAFFS)*/ - - int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev, - int chunkInNAND, const __u8 * data, - const yaffs_Spare * spare); - int (*readChunkFromNAND) (struct yaffs_DeviceStruct * dev, - int chunkInNAND, __u8 * data, - yaffs_Spare * spare); - int (*eraseBlockInNAND) (struct yaffs_DeviceStruct * dev, - int blockInNAND); - int (*initialiseNAND) (struct yaffs_DeviceStruct * dev); - -#ifdef CONFIG_YAFFS_YAFFS2 - int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct * dev, - int chunkInNAND, const __u8 * data, - const yaffs_ExtendedTags * tags); - int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct * dev, - int chunkInNAND, __u8 * data, - yaffs_ExtendedTags * tags); - int (*markNANDBlockBad) (struct yaffs_DeviceStruct * dev, int blockNo); - int (*queryNANDBlock) (struct yaffs_DeviceStruct * dev, int blockNo, - yaffs_BlockState * state, int *sequenceNumber); -#endif + int empty_lost_n_found; /* Auto-empty lost+found directory on mount */ - int isYaffs2; + int refresh_period; /* How often to check for a block refresh */ - /* The removeObjectCallback function must be supplied by OS flavours that - * need it. The Linux kernel does not use this, but yaffs direct does use - * it to implement the faster readdir + /* Checkpoint control. Can be set before or after initialisation */ + u8 skip_checkpt_rd; + u8 skip_checkpt_wr; + + int enable_xattr; /* Enable xattribs */ + + /* NAND access functions (Must be set before calling YAFFS) */ + + int (*write_chunk_fn) (struct yaffs_dev *dev, + int nand_chunk, const u8 *data, + const struct yaffs_spare *spare); + int (*read_chunk_fn) (struct yaffs_dev *dev, + int nand_chunk, u8 *data, + struct yaffs_spare *spare); + int (*erase_fn) (struct yaffs_dev *dev, int flash_block); + int (*initialise_flash_fn) (struct yaffs_dev *dev); + int (*deinitialise_flash_fn) (struct yaffs_dev *dev); + + /* yaffs2 mode functions */ + int (*write_chunk_tags_fn) (struct yaffs_dev *dev, + int nand_chunk, const u8 *data, + const struct yaffs_ext_tags *tags); + int (*read_chunk_tags_fn) (struct yaffs_dev *dev, + int nand_chunk, u8 *data, + struct yaffs_ext_tags *tags); + int (*bad_block_fn) (struct yaffs_dev *dev, int block_no); + int (*query_block_fn) (struct yaffs_dev *dev, int block_no, + enum yaffs_block_state *state, + u32 *seq_number); + + /* The remove_obj_fn function must be supplied by OS flavours that + * need it. + * yaffs direct uses it to implement the faster readdir. + * Linux uses it to protect the directory during unlocking. */ - void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj); + void (*remove_obj_fn) (struct yaffs_obj *obj); - /* Callback to mark the superblock dirsty */ - void (*markSuperBlockDirty)(void * superblock); + /* Callback to mark the superblock dirty */ + void (*sb_dirty_fn) (struct yaffs_dev *dev); - int wideTnodesDisabled; /* Set to disable wide tnodes */ + /* Callback to control garbage collection. */ + unsigned (*gc_control) (struct yaffs_dev *dev); + /* Debug control flags. Don't use unless you know what you're doing */ + int use_header_file_size; /* Flag to determine if we should use + * file sizes from the header */ + int disable_lazy_load; /* Disable lazy loading on this device */ + int wide_tnodes_disabled; /* Set to disable wide tnodes */ + int disable_soft_del; /* yaffs 1 only: Set to disable the use of + * softdeletion. */ - /* End of stuff that must be set before initialisation. */ + int defered_dir_update; /* Set to defer directory updates */ - /* Checkpoint control. Can be set before or after initialisation */ - __u8 skipCheckpointRead; - __u8 skipCheckpointWrite; +#ifdef CONFIG_YAFFS_AUTO_UNICODE + int auto_unicode; +#endif + int always_check_erased; /* Force chunk erased check always on */ - /* Runtime parameters. Set up by YAFFS. */ + int disable_summary; - __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */ - __u16 chunkGroupSize; /* == 2^^chunkGroupBits */ + int max_objects; /* + * Set to limit the number of objects created. + * 0 = no limit. + */ +}; - /* Stuff to support wide tnodes */ - __u32 tnodeWidth; - __u32 tnodeMask; +struct yaffs_dev { + struct yaffs_param param; - /* Stuff to support various file offses to chunk/offset translations */ - /* "Crumbs" for nDataBytesPerChunk not being a power of 2 */ - __u32 crumbMask; - __u32 crumbShift; - __u32 crumbsPerChunk; + /* Context storage. Holds extra OS specific data for this device */ - /* Straight shifting for nDataBytesPerChunk being a power of 2 */ - __u32 chunkShift; - __u32 chunkMask; + void *os_context; + void *driver_context; + struct list_head dev_list; -/* XXX U-BOOT XXX */ -#if 0 -#ifndef __KERNEL__ + /* Runtime parameters. Set up by YAFFS. */ + int data_bytes_per_chunk; - struct semaphore sem; /* Semaphore for waiting on erasure.*/ - struct semaphore grossLock; /* Gross locking semaphore */ - void (*putSuperFunc) (struct super_block * sb); -#endif -#endif - __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer - * at compile time so we have to allocate it. + /* Non-wide tnode stuff */ + u16 chunk_grp_bits; /* Number of bits that need to be resolved if + * the tnodes are not wide enough. */ + u16 chunk_grp_size; /* == 2^^chunk_grp_bits */ - int isMounted; + /* Stuff to support wide tnodes */ + u32 tnode_width; + u32 tnode_mask; + u32 tnode_size; - int isCheckpointed; + /* Stuff for figuring out file offset to chunk conversions */ + u32 chunk_shift; /* Shift value */ + u32 chunk_div; /* Divisor after shifting: 1 for 2^n sizes */ + u32 chunk_mask; /* Mask to use for power-of-2 case */ + int is_mounted; + int read_only; + int is_checkpointed; /* Stuff to support block offsetting to support start block zero */ - int internalStartBlock; - int internalEndBlock; - int blockOffset; - int chunkOffset; - + int internal_start_block; + int internal_end_block; + int block_offset; + int chunk_offset; /* Runtime checkpointing stuff */ - int checkpointPageSequence; /* running sequence number of checkpoint pages */ - int checkpointByteCount; - int checkpointByteOffset; - __u8 *checkpointBuffer; - int checkpointOpenForWrite; - int blocksInCheckpoint; - int checkpointCurrentChunk; - int checkpointCurrentBlock; - int checkpointNextBlock; - int *checkpointBlockList; - int checkpointMaxBlocks; - __u32 checkpointSum; - __u32 checkpointXor; + int checkpt_page_seq; /* running sequence number of checkpt pages */ + int checkpt_byte_count; + int checkpt_byte_offs; + u8 *checkpt_buffer; + int checkpt_open_write; + int blocks_in_checkpt; + int checkpt_cur_chunk; + int checkpt_cur_block; + int checkpt_next_block; + int *checkpt_block_list; + int checkpt_max_blocks; + u32 checkpt_sum; + u32 checkpt_xor; + + int checkpoint_blocks_required; /* Number of blocks needed to store + * current checkpoint set */ /* Block Info */ - yaffs_BlockInfo *blockInfo; - __u8 *chunkBits; /* bitmap of chunks in use */ - unsigned blockInfoAlt:1; /* was allocated using alternative strategy */ - unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */ - int chunkBitmapStride; /* Number of bytes of chunkBits per block. - * Must be consistent with nChunksPerBlock. + struct yaffs_block_info *block_info; + u8 *chunk_bits; /* bitmap of chunks in use */ + unsigned block_info_alt:1; /* allocated using alternative alloc */ + unsigned chunk_bits_alt:1; /* allocated using alternative alloc */ + int chunk_bit_stride; /* Number of bytes of chunk_bits per block. + * Must be consistent with chunks_per_block. */ - int nErasedBlocks; - int allocationBlock; /* Current block being allocated off */ - __u32 allocationPage; - int allocationBlockFinder; /* Used to search for next allocation block */ - - /* Runtime state */ - int nTnodesCreated; - yaffs_Tnode *freeTnodes; - int nFreeTnodes; - yaffs_TnodeList *allocatedTnodeList; - - int isDoingGC; - - int nObjectsCreated; - yaffs_Object *freeObjects; - int nFreeObjects; + int n_erased_blocks; + int alloc_block; /* Current block being allocated off */ + u32 alloc_page; + int alloc_block_finder; /* Used to search for next allocation block */ - yaffs_ObjectList *allocatedObjectList; + /* Object and Tnode memory management */ + void *allocator; + int n_obj; + int n_tnodes; - yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS]; + int n_hardlinks; - int nFreeChunks; + struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS]; + u32 bucket_finder; - int currentDirtyChecker; /* Used to find current dirtiest block */ + int n_free_chunks; - __u32 *gcCleanupList; /* objects to delete at the end of a GC. */ - int nonAggressiveSkip; /* GC state/mode */ + /* Garbage collection control */ + u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */ + u32 n_clean_ups; - /* Statistcs */ - int nPageWrites; - int nPageReads; - int nBlockErasures; - int nErasureFailures; - int nGCCopies; - int garbageCollections; - int passiveGarbageCollections; - int nRetriedWrites; - int nRetiredBlocks; - int eccFixed; - int eccUnfixed; - int tagsEccFixed; - int tagsEccUnfixed; - int nDeletions; - int nUnmarkedDeletions; - - int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */ + unsigned has_pending_prioritised_gc; /* We think this device might + have pending prioritised gcs */ + unsigned gc_disable; + unsigned gc_block_finder; + unsigned gc_dirtiest; + unsigned gc_pages_in_use; + unsigned gc_not_done; + unsigned gc_block; + unsigned gc_chunk; + unsigned gc_skip; + struct yaffs_summary_tags *gc_sum_tags; /* Special directories */ - yaffs_Object *rootDir; - yaffs_Object *lostNFoundDir; - - /* Buffer areas for storing data to recover from write failures TODO - * __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; - * yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK]; - */ - - int bufferedBlock; /* Which block is buffered here? */ - int doingBufferedBlockRewrite; + struct yaffs_obj *root_dir; + struct yaffs_obj *lost_n_found; + + int buffered_block; /* Which block is buffered here? */ + int doing_buffered_block_rewrite; + + struct yaffs_cache *cache; + int cache_last_use; + + /* Stuff for background deletion and unlinked files. */ + struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted + files live. */ + struct yaffs_obj *del_dir; /* Directory where deleted objects are + sent to disappear. */ + struct yaffs_obj *unlinked_deletion; /* Current file being + background deleted. */ + int n_deleted_files; /* Count of files awaiting deletion; */ + int n_unlinked_files; /* Count of unlinked files. */ + int n_bg_deletions; /* Count of background deletions. */ + + /* Temporary buffer management */ + struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS]; + int max_temp; + int temp_in_use; + int unmanaged_buffer_allocs; + int unmanaged_buffer_deallocs; - yaffs_ChunkCache *srCache; - int srLastUse; - - int cacheHits; + /* yaffs2 runtime stuff */ + unsigned seq_number; /* Sequence number of currently + allocating block */ + unsigned oldest_dirty_seq; + unsigned oldest_dirty_block; + + /* Block refreshing */ + int refresh_skip; /* A skip down counter. + * Refresh happens when this gets to zero. */ + + /* Dirty directory handling */ + struct list_head dirty_dirs; /* List of dirty directories */ + + /* Summary */ + int chunks_per_summary; + struct yaffs_summary_tags *sum_tags; + + /* Statistics */ + u32 n_page_writes; + u32 n_page_reads; + u32 n_erasures; + u32 n_erase_failures; + u32 n_gc_copies; + u32 all_gcs; + u32 passive_gc_count; + u32 oldest_dirty_gc_count; + u32 n_gc_blocks; + u32 bg_gcs; + u32 n_retried_writes; + u32 n_retired_blocks; + u32 n_ecc_fixed; + u32 n_ecc_unfixed; + u32 n_tags_ecc_fixed; + u32 n_tags_ecc_unfixed; + u32 n_deletions; + u32 n_unmarked_deletions; + u32 refresh_count; + u32 cache_hits; + u32 tags_used; + u32 summary_used; - /* Stuff for background deletion and unlinked files.*/ - yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */ - yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */ - yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/ - int nDeletedFiles; /* Count of files awaiting deletion;*/ - int nUnlinkedFiles; /* Count of unlinked files. */ - int nBackgroundDeletions; /* Count of background deletions. */ +}; +/* The CheckpointDevice structure holds the device information that changes + *at runtime and must be preserved over unmount/mount cycles. + */ +struct yaffs_checkpt_dev { + int struct_type; + int n_erased_blocks; + int alloc_block; /* Current block being allocated off */ + u32 alloc_page; + int n_free_chunks; - yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS]; - int maxTemp; - int unmanagedTempAllocations; - int unmanagedTempDeallocations; + int n_deleted_files; /* Count of files awaiting deletion; */ + int n_unlinked_files; /* Count of unlinked files. */ + int n_bg_deletions; /* Count of background deletions. */ /* yaffs2 runtime stuff */ - unsigned sequenceNumber; /* Sequence number of currently allocating block */ - unsigned oldestDirtySequence; + unsigned seq_number; /* Sequence number of currently + * allocating block */ }; -typedef struct yaffs_DeviceStruct yaffs_Device; - -/* The static layout of bllock usage etc is stored in the super block header */ -typedef struct { - int StructType; - int version; - int checkpointStartBlock; - int checkpointEndBlock; - int startBlock; - int endBlock; - int rfu[100]; -} yaffs_SuperBlockHeader; - -/* The CheckpointDevice structure holds the device information that changes at runtime and - * must be preserved over unmount/mount cycles. - */ -typedef struct { - int structType; - int nErasedBlocks; - int allocationBlock; /* Current block being allocated off */ - __u32 allocationPage; - int nFreeChunks; +struct yaffs_checkpt_validity { + int struct_type; + u32 magic; + u32 version; + u32 head; +}; - int nDeletedFiles; /* Count of files awaiting deletion;*/ - int nUnlinkedFiles; /* Count of unlinked files. */ - int nBackgroundDeletions; /* Count of background deletions. */ +struct yaffs_shadow_fixer { + int obj_id; + int shadowed_id; + struct yaffs_shadow_fixer *next; +}; - /* yaffs2 runtime stuff */ - unsigned sequenceNumber; /* Sequence number of currently allocating block */ - unsigned oldestDirtySequence; - -} yaffs_CheckpointDevice; - - -typedef struct { - int structType; - __u32 magic; - __u32 version; - __u32 head; -} yaffs_CheckpointValidity; - -/* Function to manipulate block info */ -static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk) -{ - if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR), - blk)); - YBUG(); - } - return &dev->blockInfo[blk - dev->internalStartBlock]; -} +/* Structure for doing xattr modifications */ +struct yaffs_xattr_mod { + int set; /* If 0 then this is a deletion */ + const YCHAR *name; + const void *data; + int size; + int flags; + int result; +}; /*----------------------- YAFFS Functions -----------------------*/ -int yaffs_GutsInitialise(yaffs_Device * dev); -void yaffs_Deinitialise(yaffs_Device * dev); +int yaffs_guts_initialise(struct yaffs_dev *dev); +void yaffs_deinitialise(struct yaffs_dev *dev); -int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev); +int yaffs_get_n_free_chunks(struct yaffs_dev *dev); -int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, - yaffs_Object * newDir, const YCHAR * newName); +int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name, + struct yaffs_obj *new_dir, const YCHAR * new_name); -int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name); -int yaffs_DeleteFile(yaffs_Object * obj); +int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name); +int yaffs_del_obj(struct yaffs_obj *obj); -int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize); -int yaffs_GetObjectFileLength(yaffs_Object * obj); -int yaffs_GetObjectInode(yaffs_Object * obj); -unsigned yaffs_GetObjectType(yaffs_Object * obj); -int yaffs_GetObjectLinkCount(yaffs_Object * obj); - -int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr); -int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr); +int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size); +loff_t yaffs_get_obj_length(struct yaffs_obj *obj); +int yaffs_get_obj_inode(struct yaffs_obj *obj); +unsigned yaffs_get_obj_type(struct yaffs_obj *obj); +int yaffs_get_obj_link_count(struct yaffs_obj *obj); /* File operations */ -int yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, loff_t offset, - int nBytes); -int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset, - int nBytes, int writeThrough); -int yaffs_ResizeFile(yaffs_Object * obj, loff_t newSize); +int yaffs_file_rd(struct yaffs_obj *obj, u8 * buffer, loff_t offset, + int n_bytes); +int yaffs_wr_file(struct yaffs_obj *obj, const u8 * buffer, loff_t offset, + int n_bytes, int write_trhrough); +int yaffs_resize_file(struct yaffs_obj *obj, loff_t new_size); + +struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid); -yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid); -int yaffs_FlushFile(yaffs_Object * obj, int updateTime); +int yaffs_flush_file(struct yaffs_obj *obj, int update_time, int data_sync); /* Flushing and checkpointing */ -void yaffs_FlushEntireDeviceCache(yaffs_Device *dev); +void yaffs_flush_whole_cache(struct yaffs_dev *dev); -int yaffs_CheckpointSave(yaffs_Device *dev); -int yaffs_CheckpointRestore(yaffs_Device *dev); +int yaffs_checkpoint_save(struct yaffs_dev *dev); +int yaffs_checkpoint_restore(struct yaffs_dev *dev); /* Directory operations */ -yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid); -yaffs_Object *yaffs_FindObjectByName(yaffs_Object * theDir, const YCHAR * name); -int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir, - int (*fn) (yaffs_Object *)); - -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number); +struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR *name, + u32 mode, u32 uid, u32 gid); +struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *the_dir, + const YCHAR *name); +struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number); /* Link operations */ -yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name, - yaffs_Object * equivalentObject); +struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR *name, + struct yaffs_obj *equiv_obj); -yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj); +struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj); /* Symlink operations */ -yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, - const YCHAR * alias); -YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj); +struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid, const YCHAR *alias); +YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj); /* Special inodes (fifos, sockets and devices) */ -yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, __u32 rdev); +struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, + const YCHAR *name, u32 mode, u32 uid, + u32 gid, u32 rdev); + +int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR *name, + const void *value, int size, int flags); +int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR *name, void *value, + int size); +int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size); +int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR *name); /* Special directories */ -yaffs_Object *yaffs_Root(yaffs_Device * dev); -yaffs_Object *yaffs_LostNFound(yaffs_Device * dev); +struct yaffs_obj *yaffs_root(struct yaffs_dev *dev); +struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev); -#ifdef CONFIG_YAFFS_WINCE -/* CONFIG_YAFFS_WINCE special stuff */ -void yfsd_WinFileTimeNow(__u32 target[2]); -#endif +void yaffs_handle_defered_free(struct yaffs_obj *obj); -/* XXX U-BOOT XXX */ -#if 0 -#ifndef __KERNEL__ -void yaffs_HandleDeferedFree(yaffs_Object * obj); -#endif -#endif +void yaffs_update_dirty_dirs(struct yaffs_dev *dev); -/* Debug dump */ -int yaffs_DumpObject(yaffs_Object * obj); +int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency); -void yaffs_GutsTest(yaffs_Device * dev); +/* Debug dump */ +int yaffs_dump_obj(struct yaffs_obj *obj); + +void yaffs_guts_test(struct yaffs_dev *dev); + +/* A few useful functions to be used within the core files*/ +void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, + int lyn); +int yaffs_check_ff(u8 *buffer, int n_bytes); +void yaffs_handle_chunk_error(struct yaffs_dev *dev, + struct yaffs_block_info *bi); + +u8 *yaffs_get_temp_buffer(struct yaffs_dev *dev); +void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 *buffer); + +struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, + int number, + enum yaffs_obj_type type); +int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, + int nand_chunk, int in_scan); +void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR *name); +void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, + const struct yaffs_obj_hdr *oh); +void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj); +YCHAR *yaffs_clone_str(const YCHAR *str); +void yaffs_link_fixup(struct yaffs_dev *dev, struct list_head *hard_list); +void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no); +int yaffs_update_oh(struct yaffs_obj *in, const YCHAR *name, + int force, int is_shrink, int shadows, + struct yaffs_xattr_mod *xop); +void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, + int backward_scanning); +int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks); +struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev); +struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id, + struct yaffs_tnode *passed_tn); + +int yaffs_do_file_wr(struct yaffs_obj *in, const u8 *buffer, loff_t offset, + int n_bytes, int write_trhrough); +void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size); +void yaffs_skip_rest_of_block(struct yaffs_dev *dev); + +int yaffs_count_free_chunks(struct yaffs_dev *dev); + +struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id); + +u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos); + +int yaffs_is_non_empty_dir(struct yaffs_obj *obj); + +void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr, + int *chunk_out, u32 *offset_out); +/* + * Marshalling functions to get loff_t file sizes into aand out of + * object headers. + */ +void yaffs_oh_size_load(struct yaffs_obj_hdr *oh, loff_t fsize); +loff_t yaffs_oh_to_size(struct yaffs_obj_hdr *oh); +loff_t yaffs_max_file_size(struct yaffs_dev *dev); -/* A few useful functions */ -void yaffs_InitialiseTags(yaffs_ExtendedTags * tags); -void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn); -int yaffs_CheckFF(__u8 * buffer, int nBytes); -void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi); #endif diff --git a/fs/yaffs2/yaffs_hweight.c b/fs/yaffs2/yaffs_hweight.c new file mode 100644 index 0000000..d96773e --- /dev/null +++ b/fs/yaffs2/yaffs_hweight.c @@ -0,0 +1,52 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* These functions have been renamed to hweightxx to match the + * equivaqlent functions in the Linux kernel. + */ + +#include "yaffs_hweight.h" + +static const char yaffs_count_bits_table[256] = { + 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 +}; + +int yaffs_hweight8(u8 x) +{ + int ret_val; + ret_val = yaffs_count_bits_table[x]; + return ret_val; +} + +int yaffs_hweight32(u32 x) +{ + return yaffs_hweight8(x & 0xff) + + yaffs_hweight8((x >> 8) & 0xff) + + yaffs_hweight8((x >> 16) & 0xff) + + yaffs_hweight8((x >> 24) & 0xff); +} diff --git a/fs/yaffs2/yaffs_malloc.h b/fs/yaffs2/yaffs_hweight.h index 3ed6175..3f7c6c3 100644 --- a/fs/yaffs2/yaffs_malloc.h +++ b/fs/yaffs2/yaffs_hweight.h @@ -1,8 +1,7 @@ -#ifndef __YAFFS_MALLOC_H__ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -14,12 +13,12 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ -/* XXX U-BOOT XXX */ -#if 0 -#include <stdlib.h> -#endif +#ifndef __YAFFS_HWEIGHT_H__ +#define __YAFFS_HWEIGHT_H__ + +#include "yportenv.h" -void *yaffs_malloc(size_t size); -void yaffs_free(void *ptr); +int yaffs_hweight8(u8 x); +int yaffs_hweight32(u32 x); #endif diff --git a/fs/yaffs2/yaffs_list.h b/fs/yaffs2/yaffs_list.h new file mode 100644 index 0000000..a7afaea --- /dev/null +++ b/fs/yaffs2/yaffs_list.h @@ -0,0 +1,126 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +/* + * This file is just holds extra declarations of macros that would normally + * be providesd in the Linux kernel. These macros have been written from + * scratch but are functionally equivalent to the Linux ones. + * + */ + +#ifndef __YAFFS_LIST_H__ +#define __YAFFS_LIST_H__ + + +/* + * This is a simple doubly linked list implementation that matches the + * way the Linux kernel doubly linked list implementation works. + */ + +struct list_head { + struct list_head *next; /* next in chain */ + struct list_head *prev; /* previous in chain */ +}; + + +/* Initialise a static list */ +#define LIST_HEAD(name) \ +struct list_head name = { &(name), &(name)} + + + +/* Initialise a list head to an empty list */ +#define INIT_LIST_HEAD(p) \ +do { \ + (p)->next = (p);\ + (p)->prev = (p); \ +} while (0) + + +/* Add an element to a list */ +static inline void list_add(struct list_head *new_entry, + struct list_head *list) +{ + struct list_head *list_next = list->next; + + list->next = new_entry; + new_entry->prev = list; + new_entry->next = list_next; + list_next->prev = new_entry; + +} + +static inline void list_add_tail(struct list_head *new_entry, + struct list_head *list) +{ + struct list_head *list_prev = list->prev; + + list->prev = new_entry; + new_entry->next = list; + new_entry->prev = list_prev; + list_prev->next = new_entry; + +} + + +/* Take an element out of its current list, with or without + * reinitialising the links.of the entry*/ +static inline void list_del(struct list_head *entry) +{ + struct list_head *list_next = entry->next; + struct list_head *list_prev = entry->prev; + + list_next->prev = list_prev; + list_prev->next = list_next; + +} + +static inline void list_del_init(struct list_head *entry) +{ + list_del(entry); + entry->next = entry->prev = entry; +} + + +/* Test if the list is empty */ +static inline int list_empty(struct list_head *entry) +{ + return (entry->next == entry); +} + + +/* list_entry takes a pointer to a list entry and offsets it to that + * we can find a pointer to the object it is embedded in. + */ + + +#define list_entry(entry, type, member) \ + ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member))) + + +/* list_for_each and list_for_each_safe iterate over lists. + * list_for_each_safe uses temporary storage to make the list delete safe + */ + +#define list_for_each(itervar, list) \ + for (itervar = (list)->next; itervar != (list); itervar = itervar->next) + +#define list_for_each_safe(itervar, save_var, list) \ + for (itervar = (list)->next, save_var = (list)->next->next; \ + itervar != (list); \ + itervar = save_var, save_var = save_var->next) + + +#endif diff --git a/fs/yaffs2/yaffs_mtdif.c b/fs/yaffs2/yaffs_mtdif.c index d0e16d0..db49052 100644 --- a/fs/yaffs2/yaffs_mtdif.c +++ b/fs/yaffs2/yaffs_mtdif.c @@ -14,9 +14,6 @@ /* XXX U-BOOT XXX */ #include <common.h> -const char *yaffs_mtdif_c_version = - "$Id: yaffs_mtdif.c,v 1.19 2007/02/14 01:09:06 wookey Exp $"; - #include "yportenv.h" @@ -27,72 +24,56 @@ const char *yaffs_mtdif_c_version = #include "linux/time.h" #include "linux/mtd/nand.h" -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)) -static struct nand_oobinfo yaffs_oobinfo = { - .useecc = 1, - .eccbytes = 6, - .eccpos = {8, 9, 10, 13, 14, 15} -}; - -static struct nand_oobinfo yaffs_noeccinfo = { - .useecc = 0, -}; -#endif -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob) +static inline void translate_spare2oob(const struct yaffs_spare *spare, u8 *oob) { - oob[0] = spare->tagByte0; - oob[1] = spare->tagByte1; - oob[2] = spare->tagByte2; - oob[3] = spare->tagByte3; - oob[4] = spare->tagByte4; - oob[5] = spare->tagByte5 & 0x3f; - oob[5] |= spare->blockStatus == 'Y' ? 0: 0x80; - oob[5] |= spare->pageStatus == 0 ? 0: 0x40; - oob[6] = spare->tagByte6; - oob[7] = spare->tagByte7; + oob[0] = spare->tb0; + oob[1] = spare->tb1; + oob[2] = spare->tb2; + oob[3] = spare->tb3; + oob[4] = spare->tb4; + oob[5] = spare->tb5 & 0x3f; + oob[5] |= spare->block_status == 'Y' ? 0 : 0x80; + oob[5] |= spare->page_status == 0 ? 0 : 0x40; + oob[6] = spare->tb6; + oob[7] = spare->tb7; } -static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob) +static inline void translate_oob2spare(struct yaffs_spare *spare, u8 *oob) { - struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare; - spare->tagByte0 = oob[0]; - spare->tagByte1 = oob[1]; - spare->tagByte2 = oob[2]; - spare->tagByte3 = oob[3]; - spare->tagByte4 = oob[4]; - spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f; - spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y'; - spare->pageStatus = oob[5] & 0x40 ? 0xff : 0; + struct yaffs_nand_spare *nspare = (struct yaffs_nand_spare *)spare; + spare->tb0 = oob[0]; + spare->tb1 = oob[1]; + spare->tb2 = oob[2]; + spare->tb3 = oob[3]; + spare->tb4 = oob[4]; + spare->tb5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f; + spare->block_status = oob[5] & 0x80 ? 0xff : 'Y'; + spare->page_status = oob[5] & 0x40 ? 0xff : 0; spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff; - spare->tagByte6 = oob[6]; - spare->tagByte7 = oob[7]; + spare->tb6 = oob[6]; + spare->tb7 = oob[7]; spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff; nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */ } -#endif -int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, const yaffs_Spare * spare) + +int nandmtd_WriteChunkToNAND(struct yaffs_dev *dev, int chunkInNAND, + const u8 *data, const struct yaffs_spare *spare) { - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) + struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); struct mtd_oob_ops ops; -#endif size_t dummy; int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - __u8 spareAsBytes[8]; /* OOB */ + loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk; + u8 spareAsBytes[8]; /* OOB */ if (data && !spare) - retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk, + retval = mtd->write(mtd, addr, dev->data_bytes_per_chunk, &dummy, data); else if (spare) { - if (dev->useNANDECC) { + if (dev->param.use_nand_ecc) { translate_spare2oob(spare, spareAsBytes); ops.mode = MTD_OOB_AUTO; ops.ooblen = 8; /* temp hack */ @@ -100,37 +81,12 @@ int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, ops.mode = MTD_OOB_RAW; ops.ooblen = YAFFS_BYTES_PER_SPARE; } - ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; + ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen; ops.datbuf = (u8 *)data; ops.ooboffs = 0; ops.oobbuf = spareAsBytes; retval = mtd->write_oob(mtd, addr, &ops); } -#else - __u8 *spareAsBytes = (__u8 *) spare; - - if (data && spare) { - if (dev->useNANDECC) - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_oobinfo); - else - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_noeccinfo); - } else { - if (data) - retval = - mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (spare) - retval = - mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, - &dummy, spareAsBytes); - } -#endif if (retval == 0) return YAFFS_OK; @@ -138,69 +94,36 @@ int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, return YAFFS_FAIL; } -int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data, - yaffs_Spare * spare) +int nandmtd_ReadChunkFromNAND(struct yaffs_dev *dev, int chunkInNAND, u8 *data, + struct yaffs_spare *spare) { - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) + struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); struct mtd_oob_ops ops; -#endif size_t dummy; int retval = 0; - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - __u8 spareAsBytes[8]; /* OOB */ + loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk; + u8 spareAsBytes[8]; /* OOB */ if (data && !spare) - retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, + retval = mtd->read(mtd, addr, dev->data_bytes_per_chunk, &dummy, data); else if (spare) { - if (dev->useNANDECC) { + if (dev->param.use_nand_ecc) { ops.mode = MTD_OOB_AUTO; ops.ooblen = 8; /* temp hack */ } else { ops.mode = MTD_OOB_RAW; ops.ooblen = YAFFS_BYTES_PER_SPARE; } - ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; + ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen; ops.datbuf = data; ops.ooboffs = 0; ops.oobbuf = spareAsBytes; retval = mtd->read_oob(mtd, addr, &ops); - if (dev->useNANDECC) + if (dev->param.use_nand_ecc) translate_oob2spare(spare, spareAsBytes); } -#else - __u8 *spareAsBytes = (__u8 *) spare; - - if (data && spare) { - if (dev->useNANDECC) { - /* Careful, this call adds 2 ints */ - /* to the end of the spare data. Calling function */ - /* should allocate enough memory for spare, */ - /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */ - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_oobinfo); - } else { - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_noeccinfo); - } - } else { - if (data) - retval = - mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (spare) - retval = - mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, - &dummy, spareAsBytes); - } -#endif if (retval == 0) return YAFFS_OK; @@ -208,18 +131,18 @@ int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data, return YAFFS_FAIL; } -int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber) +int nandmtd_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber) { - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); + struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); __u32 addr = - ((loff_t) blockNumber) * dev->nDataBytesPerChunk - * dev->nChunksPerBlock; + ((loff_t) blockNumber) * dev->data_bytes_per_chunk + * dev->param.chunks_per_block; struct erase_info ei; int retval = 0; ei.mtd = mtd; ei.addr = addr; - ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock; + ei.len = dev->data_bytes_per_chunk * dev->param.chunks_per_block; ei.time = 1000; ei.retries = 2; ei.callback = NULL; @@ -227,10 +150,6 @@ int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber) /* Todo finish off the ei if required */ -/* XXX U-BOOT XXX */ -#if 0 - sema_init(&dev->sem, 0); -#endif retval = mtd->erase(mtd, &ei); @@ -240,7 +159,7 @@ int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber) return YAFFS_FAIL; } -int nandmtd_InitialiseNAND(yaffs_Device * dev) +int nandmtd_InitialiseNAND(struct yaffs_dev *dev) { return YAFFS_OK; } diff --git a/fs/yaffs2/yaffs_mtdif.h b/fs/yaffs2/yaffs_mtdif.h index 317600c..1a12582 100644 --- a/fs/yaffs2/yaffs_mtdif.h +++ b/fs/yaffs2/yaffs_mtdif.h @@ -18,10 +18,10 @@ #include "yaffs_guts.h" -int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, const yaffs_Spare * spare); -int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data, - yaffs_Spare * spare); -int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber); -int nandmtd_InitialiseNAND(yaffs_Device * dev); +int nandmtd_WriteChunkToNAND(struct yaffs_dev *dev, int chunkInNAND, + const u8 *data, const struct yaffs_spare *spare); +int nandmtd_ReadChunkFromNAND(struct yaffs_dev *dev, int chunkInNAND, u8 *data, + struct yaffs_spare *spare); +int nandmtd_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber); +int nandmtd_InitialiseNAND(struct yaffs_dev *dev); #endif diff --git a/fs/yaffs2/yaffs_mtdif2.c b/fs/yaffs2/yaffs_mtdif2.c index f569b99..b27fe56 100644 --- a/fs/yaffs2/yaffs_mtdif2.c +++ b/fs/yaffs2/yaffs_mtdif2.c @@ -17,11 +17,8 @@ #include <common.h> #include "asm/errno.h" -const char *yaffs_mtdif2_c_version = - "$Id: yaffs_mtdif2.c,v 1.17 2007/02/14 01:09:06 wookey Exp $"; - #include "yportenv.h" - +#include "yaffs_trace.h" #include "yaffs_mtdif2.h" @@ -29,71 +26,67 @@ const char *yaffs_mtdif2_c_version = #include "linux/types.h" #include "linux/time.h" +#include "yaffs_trace.h" #include "yaffs_packedtags2.h" +#include "string.h" -int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - struct mtd_oob_ops ops; -#else - size_t dummy; -#endif - int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; - - yaffs_PackedTags2 pt; +#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context)) +#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context)) - T(YAFFS_TRACE_MTD, - (TSTR - ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p" - TENDSTR), chunkInNAND, data, tags)); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - if (tags) - yaffs_PackTags2(&pt, tags); - else - BUG(); /* both tags and data should always be present */ +/* NB For use with inband tags.... + * We assume that the data buffer is of size total_bytes_per_chunk so + * that we can also use it to load the tags. + */ +int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, + const struct yaffs_ext_tags *tags) +{ + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + struct mtd_oob_ops ops; - if (data) { - ops.mode = MTD_OOB_AUTO; - ops.ooblen = sizeof(pt); - ops.len = dev->nDataBytesPerChunk; - ops.ooboffs = 0; - ops.datbuf = (__u8 *)data; - ops.oobbuf = (void *)&pt; - retval = mtd->write_oob(mtd, addr, &ops); - } else - BUG(); /* both tags and data should always be present */ -#else - if (tags) { - yaffs_PackTags2(&pt, tags); - } + int retval = 0; - if (data && tags) { - if (dev->useNANDECC) - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, (__u8 *) & pt, NULL); - else - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, (__u8 *) & pt, NULL); + loff_t addr; + u8 local_spare[128]; + + struct yaffs_packed_tags2 pt; + + int packed_tags_size = + dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); + void *packed_tags_ptr = + dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; + + yaffs_trace(YAFFS_TRACE_MTD, + "nandmtd2_write_chunk_tags chunk %d data %p tags %p", + nand_chunk, data, tags); + + addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; + + /* For yaffs2 writing there must be both data and tags. + * If we're using inband tags, then the tags are stuffed into + * the end of the data buffer. + */ + if (!data || !tags) + BUG(); + else if (dev->param.inband_tags) { + struct yaffs_packed_tags2_tags_only *pt2tp; + pt2tp = + (struct yaffs_packed_tags2_tags_only *)(data + + dev-> + data_bytes_per_chunk); + yaffs_pack_tags2_tags_only(pt2tp, tags); } else { - if (data) - retval = - mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (tags) - retval = - mtd->write_oob(mtd, addr, mtd->oobsize, &dummy, - (__u8 *) & pt); - + yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc); } -#endif + + ops.mode = MTD_OOB_AUTO; + ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size; + ops.len = dev->param.total_bytes_per_chunk; + ops.ooboffs = 0; + ops.datbuf = (u8 *) data; + ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr; + retval = mtd->write_oob(mtd, addr, &ops); if (retval == 0) return YAFFS_OK; @@ -101,88 +94,97 @@ int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, return YAFFS_FAIL; } -int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, - __u8 * data, yaffs_ExtendedTags * tags) +int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, + u8 *data, struct yaffs_ext_tags *tags) { - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + u8 local_spare[128]; struct mtd_oob_ops ops; -#endif size_t dummy; int retval = 0; + int local_data = 0; + struct yaffs_packed_tags2 pt; + loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; + int packed_tags_size = + dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); + void *packed_tags_ptr = + dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; + + yaffs_trace(YAFFS_TRACE_MTD, + "nandmtd2_read_chunk_tags chunk %d data %p tags %p", + nand_chunk, data, tags); + + if (dev->param.inband_tags) { + + if (!data) { + local_data = 1; + data = yaffs_get_temp_buffer(dev); + } - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; - - yaffs_PackedTags2 pt; - - T(YAFFS_TRACE_MTD, - (TSTR - ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p" - TENDSTR), chunkInNAND, data, tags)); + } -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - if (data && !tags) - retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data); + if (dev->param.inband_tags || (data && !tags)) + retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk, + &dummy, data); else if (tags) { ops.mode = MTD_OOB_AUTO; - ops.ooblen = sizeof(pt); - ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt); + ops.ooblen = packed_tags_size; + ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size; ops.ooboffs = 0; ops.datbuf = data; - ops.oobbuf = dev->spareBuffer; + ops.oobbuf = local_spare; retval = mtd->read_oob(mtd, addr, &ops); } -#else - if (data && tags) { - if (dev->useNANDECC) { - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, dev->spareBuffer, - NULL); - } else { - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, dev->spareBuffer, - NULL); + + if (dev->param.inband_tags) { + if (tags) { + struct yaffs_packed_tags2_tags_only *pt2tp; + pt2tp = + (struct yaffs_packed_tags2_tags_only *) + &data[dev->data_bytes_per_chunk]; + yaffs_unpack_tags2_tags_only(tags, pt2tp); } } else { - if (data) - retval = - mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (tags) - retval = - mtd->read_oob(mtd, addr, mtd->oobsize, &dummy, - dev->spareBuffer); + if (tags) { + memcpy(packed_tags_ptr, + local_spare, + packed_tags_size); + yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); + } } -#endif - - memcpy(&pt, dev->spareBuffer, sizeof(pt)); - if (tags) - yaffs_UnpackTags2(tags, &pt); - - if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) - tags->eccResult = YAFFS_ECC_RESULT_UNFIXED; + if (local_data) + yaffs_release_temp_buffer(dev, data); + if (tags && retval == -EBADMSG + && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { + tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; + dev->n_ecc_unfixed++; + } + if (tags && retval == -EUCLEAN + && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { + tags->ecc_result = YAFFS_ECC_RESULT_FIXED; + dev->n_ecc_fixed++; + } if (retval == 0) return YAFFS_OK; else return YAFFS_FAIL; } -int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) + +int nandmtd2_MarkNANDBlockBad(struct yaffs_dev *dev, int blockNo) { - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); + struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); int retval; - T(YAFFS_TRACE_MTD, - (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo)); + + yaffs_trace(YAFFS_TRACE_MTD, + "nandmtd2_MarkNANDBlockBad %d", blockNo); retval = mtd->block_markbad(mtd, - blockNo * dev->nChunksPerBlock * - dev->nDataBytesPerChunk); + blockNo * dev->param.chunks_per_block * + dev->data_bytes_per_chunk); if (retval == 0) return YAFFS_OK; @@ -191,42 +193,40 @@ int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) } -int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState * state, int *sequenceNumber) +int nandmtd2_QueryNANDBlock(struct yaffs_dev *dev, int blockNo, + enum yaffs_block_state *state, u32 *sequenceNumber) { - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); + struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); int retval; - T(YAFFS_TRACE_MTD, - (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo)); + yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_QueryNANDBlock %d", blockNo); retval = mtd->block_isbad(mtd, - blockNo * dev->nChunksPerBlock * - dev->nDataBytesPerChunk); + blockNo * dev->param.chunks_per_block * + dev->data_bytes_per_chunk); if (retval) { - T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR))); + yaffs_trace(YAFFS_TRACE_MTD, "block is bad"); *state = YAFFS_BLOCK_STATE_DEAD; *sequenceNumber = 0; } else { - yaffs_ExtendedTags t; - nandmtd2_ReadChunkWithTagsFromNAND(dev, - blockNo * - dev->nChunksPerBlock, NULL, - &t); - - if (t.chunkUsed) { - *sequenceNumber = t.sequenceNumber; - *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; + struct yaffs_ext_tags t; + nandmtd2_read_chunk_tags(dev, + blockNo * + dev->param.chunks_per_block, NULL, + &t); + + if (t.chunk_used) { + *sequenceNumber = t.seq_number; + *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; } else { *sequenceNumber = 0; *state = YAFFS_BLOCK_STATE_EMPTY; } } - T(YAFFS_TRACE_MTD, - (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber, - *state)); + yaffs_trace(YAFFS_TRACE_MTD, "block is bad seq %d state %d", + *sequenceNumber, *state); if (retval == 0) return YAFFS_OK; diff --git a/fs/yaffs2/yaffs_mtdif2.h b/fs/yaffs2/yaffs_mtdif2.h index b67ba52..62be173 100644 --- a/fs/yaffs2/yaffs_mtdif2.h +++ b/fs/yaffs2/yaffs_mtdif2.h @@ -17,13 +17,14 @@ #define __YAFFS_MTDIF2_H__ #include "yaffs_guts.h" -int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags); -int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, - __u8 * data, yaffs_ExtendedTags * tags); -int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState * state, int *sequenceNumber); + +int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int chunkInNAND, + const u8 *data, + const struct yaffs_ext_tags *tags); +int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int chunkInNAND, + u8 *data, struct yaffs_ext_tags *tags); +int nandmtd2_MarkNANDBlockBad(struct yaffs_dev *dev, int blockNo); +int nandmtd2_QueryNANDBlock(struct yaffs_dev *dev, int blockNo, + enum yaffs_block_state *state, u32 *sequenceNumber); #endif diff --git a/fs/yaffs2/yaffs_nameval.c b/fs/yaffs2/yaffs_nameval.c new file mode 100644 index 0000000..a20a3e4 --- /dev/null +++ b/fs/yaffs2/yaffs_nameval.c @@ -0,0 +1,208 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* + * This simple implementation of a name-value store assumes a small number of +* values and fits into a small finite buffer. + * + * Each attribute is stored as a record: + * sizeof(int) bytes record size. + * yaffs_strnlen+1 bytes name null terminated. + * nbytes value. + * ---------- + * total size stored in record size + * + * This code has not been tested with unicode yet. + */ + +#include "yaffs_nameval.h" + +#include "yportenv.h" + +static int nval_find(const char *xb, int xb_size, const YCHAR *name, + int *exist_size) +{ + int pos = 0; + int size; + + memcpy(&size, xb, sizeof(int)); + while (size > 0 && (size < xb_size) && (pos + size < xb_size)) { + if (!yaffs_strncmp((YCHAR *) (xb + pos + sizeof(int)), + name, size)) { + if (exist_size) + *exist_size = size; + return pos; + } + pos += size; + if (pos < xb_size - sizeof(int)) + memcpy(&size, xb + pos, sizeof(int)); + else + size = 0; + } + if (exist_size) + *exist_size = 0; + return -ENODATA; +} + +static int nval_used(const char *xb, int xb_size) +{ + int pos = 0; + int size; + + memcpy(&size, xb + pos, sizeof(int)); + while (size > 0 && (size < xb_size) && (pos + size < xb_size)) { + pos += size; + if (pos < xb_size - sizeof(int)) + memcpy(&size, xb + pos, sizeof(int)); + else + size = 0; + } + return pos; +} + +int nval_del(char *xb, int xb_size, const YCHAR *name) +{ + int pos = nval_find(xb, xb_size, name, NULL); + int size; + + if (pos < 0 || pos >= xb_size) + return -ENODATA; + + /* Find size, shift rest over this record, + * then zero out the rest of buffer */ + memcpy(&size, xb + pos, sizeof(int)); + memcpy(xb + pos, xb + pos + size, xb_size - (pos + size)); + memset(xb + (xb_size - size), 0, size); + return 0; +} + +int nval_set(char *xb, int xb_size, const YCHAR *name, const char *buf, + int bsize, int flags) +{ + int pos; + int namelen = yaffs_strnlen(name, xb_size); + int reclen; + int size_exist = 0; + int space; + int start; + + pos = nval_find(xb, xb_size, name, &size_exist); + + if (flags & XATTR_CREATE && pos >= 0) + return -EEXIST; + if (flags & XATTR_REPLACE && pos < 0) + return -ENODATA; + + start = nval_used(xb, xb_size); + space = xb_size - start + size_exist; + + reclen = (sizeof(int) + namelen + 1 + bsize); + + if (reclen > space) + return -ENOSPC; + + if (pos >= 0) { + nval_del(xb, xb_size, name); + start = nval_used(xb, xb_size); + } + + pos = start; + + memcpy(xb + pos, &reclen, sizeof(int)); + pos += sizeof(int); + yaffs_strncpy((YCHAR *) (xb + pos), name, reclen); + pos += (namelen + 1); + memcpy(xb + pos, buf, bsize); + return 0; +} + +int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf, + int bsize) +{ + int pos = nval_find(xb, xb_size, name, NULL); + int size; + + if (pos >= 0 && pos < xb_size) { + + memcpy(&size, xb + pos, sizeof(int)); + pos += sizeof(int); /* advance past record length */ + size -= sizeof(int); + + /* Advance over name string */ + while (xb[pos] && size > 0 && pos < xb_size) { + pos++; + size--; + } + /*Advance over NUL */ + pos++; + size--; + + /* If bsize is zero then this is a size query. + * Return the size, but don't copy. + */ + if (!bsize) + return size; + + if (size <= bsize) { + memcpy(buf, xb + pos, size); + return size; + } + } + if (pos >= 0) + return -ERANGE; + + return -ENODATA; +} + +int nval_list(const char *xb, int xb_size, char *buf, int bsize) +{ + int pos = 0; + int size; + int name_len; + int ncopied = 0; + int filled = 0; + + memcpy(&size, xb + pos, sizeof(int)); + while (size > sizeof(int) && + size <= xb_size && + (pos + size) < xb_size && + !filled) { + pos += sizeof(int); + size -= sizeof(int); + name_len = yaffs_strnlen((YCHAR *) (xb + pos), size); + if (ncopied + name_len + 1 < bsize) { + memcpy(buf, xb + pos, name_len * sizeof(YCHAR)); + buf += name_len; + *buf = '\0'; + buf++; + if (sizeof(YCHAR) > 1) { + *buf = '\0'; + buf++; + } + ncopied += (name_len + 1); + } else { + filled = 1; + } + pos += size; + if (pos < xb_size - sizeof(int)) + memcpy(&size, xb + pos, sizeof(int)); + else + size = 0; + } + return ncopied; +} + +int nval_hasvalues(const char *xb, int xb_size) +{ + return nval_used(xb, xb_size) > 0; +} diff --git a/fs/yaffs2/yaffs_qsort.h b/fs/yaffs2/yaffs_nameval.h index 19083da..951e64f 100644 --- a/fs/yaffs2/yaffs_qsort.h +++ b/fs/yaffs2/yaffs_nameval.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -13,11 +13,16 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ +#ifndef __NAMEVAL_H__ +#define __NAMEVAL_H__ -#ifndef __YAFFS_QSORT_H__ -#define __YAFFS_QSORT_H__ - -extern void yaffs_qsort (void *const base, size_t total_elems, size_t size, - int (*cmp)(const void *, const void *)); +#include "yportenv.h" +int nval_del(char *xb, int xb_size, const YCHAR * name); +int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf, + int bsize, int flags); +int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf, + int bsize); +int nval_list(const char *xb, int xb_size, char *buf, int bsize); +int nval_hasvalues(const char *xb, int xb_size); #endif diff --git a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c index ce048cc..165d010 100644 --- a/fs/yaffs2/yaffs_nand.c +++ b/fs/yaffs2/yaffs_nand.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,124 +11,110 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_nand_c_version = - "$Id: yaffs_nand.c,v 1.7 2007/02/14 01:09:06 wookey Exp $"; - #include "yaffs_nand.h" #include "yaffs_tagscompat.h" -#include "yaffs_tagsvalidity.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_summary.h" -int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, - __u8 * buffer, - yaffs_ExtendedTags * tags) +int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk, + u8 *buffer, struct yaffs_ext_tags *tags) { int result; - yaffs_ExtendedTags localTags; + struct yaffs_ext_tags local_tags; + int flash_chunk = nand_chunk - dev->chunk_offset; - int realignedChunkInNAND = chunkInNAND - dev->chunkOffset; + dev->n_page_reads++; - /* If there are no tags provided, use local tags to get prioritised gc working */ - if(!tags) - tags = &localTags; + /* If there are no tags provided use local tags. */ + if (!tags) + tags = &local_tags; - if (dev->readChunkWithTagsFromNAND) - result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer, - tags); + if (dev->param.read_chunk_tags_fn) + result = + dev->param.read_chunk_tags_fn(dev, flash_chunk, buffer, + tags); else - result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev, - realignedChunkInNAND, - buffer, - tags); - if(tags && - tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){ - - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock); - yaffs_HandleChunkError(dev,bi); + result = yaffs_tags_compat_rd(dev, + flash_chunk, buffer, tags); + if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) { + + struct yaffs_block_info *bi; + bi = yaffs_get_block_info(dev, + nand_chunk / + dev->param.chunks_per_block); + yaffs_handle_chunk_error(dev, bi); } - return result; } -int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * buffer, - yaffs_ExtendedTags * tags) +int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, + int nand_chunk, + const u8 *buffer, struct yaffs_ext_tags *tags) { - chunkInNAND -= dev->chunkOffset; + int result; + int flash_chunk = nand_chunk - dev->chunk_offset; + dev->n_page_writes++; if (tags) { - tags->sequenceNumber = dev->sequenceNumber; - tags->chunkUsed = 1; - if (!yaffs_ValidateTags(tags)) { - T(YAFFS_TRACE_ERROR, - (TSTR("Writing uninitialised tags" TENDSTR))); - YBUG(); - } - T(YAFFS_TRACE_WRITE, - (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND, - tags->objectId, tags->chunkId)); + tags->seq_number = dev->seq_number; + tags->chunk_used = 1; + yaffs_trace(YAFFS_TRACE_WRITE, + "Writing chunk %d tags %d %d", + nand_chunk, tags->obj_id, tags->chunk_id); } else { - T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR))); - YBUG(); + yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags"); + BUG(); + return YAFFS_FAIL; } - if (dev->writeChunkWithTagsToNAND) - return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer, - tags); + if (dev->param.write_chunk_tags_fn) + result = dev->param.write_chunk_tags_fn(dev, flash_chunk, + buffer, tags); else - return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev, - chunkInNAND, - buffer, - tags); + result = yaffs_tags_compat_wr(dev, flash_chunk, buffer, tags); + + yaffs_summary_add(dev, tags, nand_chunk); + + return result; } -int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo) +int yaffs_mark_bad(struct yaffs_dev *dev, int block_no) { - blockNo -= dev->blockOffset; + block_no -= dev->block_offset; + if (dev->param.bad_block_fn) + return dev->param.bad_block_fn(dev, block_no); -; - if (dev->markNANDBlockBad) - return dev->markNANDBlockBad(dev, blockNo); - else - return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo); + return yaffs_tags_compat_mark_bad(dev, block_no); } -int yaffs_QueryInitialBlockState(yaffs_Device * dev, - int blockNo, - yaffs_BlockState * state, - int *sequenceNumber) +int yaffs_query_init_block_state(struct yaffs_dev *dev, + int block_no, + enum yaffs_block_state *state, + u32 *seq_number) { - blockNo -= dev->blockOffset; + block_no -= dev->block_offset; + if (dev->param.query_block_fn) + return dev->param.query_block_fn(dev, block_no, state, + seq_number); - if (dev->queryNANDBlock) - return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber); - else - return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo, - state, - sequenceNumber); + return yaffs_tags_compat_query_block(dev, block_no, state, seq_number); } - -int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND) +int yaffs_erase_block(struct yaffs_dev *dev, int flash_block) { int result; - blockInNAND -= dev->blockOffset; - - - dev->nBlockErasures++; - result = dev->eraseBlockInNAND(dev, blockInNAND); - + flash_block -= dev->block_offset; + dev->n_erasures++; + result = dev->param.erase_fn(dev, flash_block); return result; } -int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) +int yaffs_init_nand(struct yaffs_dev *dev) { - return dev->initialiseNAND(dev); + if (dev->param.initialise_flash_fn) + return dev->param.initialise_flash_fn(dev); + return YAFFS_OK; } diff --git a/fs/yaffs2/yaffs_nand.h b/fs/yaffs2/yaffs_nand.h index f3bedcf..7134662 100644 --- a/fs/yaffs2/yaffs_nand.h +++ b/fs/yaffs2/yaffs_nand.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -17,27 +17,22 @@ #define __YAFFS_NAND_H__ #include "yaffs_guts.h" +int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk, + u8 *buffer, struct yaffs_ext_tags *tags); +int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, + int nand_chunk, + const u8 *buffer, struct yaffs_ext_tags *tags); -int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, - __u8 * buffer, - yaffs_ExtendedTags * tags); +int yaffs_mark_bad(struct yaffs_dev *dev, int block_no); -int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * buffer, - yaffs_ExtendedTags * tags); +int yaffs_query_init_block_state(struct yaffs_dev *dev, + int block_no, + enum yaffs_block_state *state, + unsigned *seq_number); -int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo); +int yaffs_erase_block(struct yaffs_dev *dev, int flash_block); -int yaffs_QueryInitialBlockState(yaffs_Device * dev, - int blockNo, - yaffs_BlockState * state, - int *sequenceNumber); - -int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND); - -int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev); +int yaffs_init_nand(struct yaffs_dev *dev); #endif diff --git a/fs/yaffs2/yaffs_nandemul2k.h b/fs/yaffs2/yaffs_nandemul2k.h index cd2e96f..cb0c4e6 100644 --- a/fs/yaffs2/yaffs_nandemul2k.h +++ b/fs/yaffs2/yaffs_nandemul2k.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -20,18 +20,18 @@ #include "yaffs_guts.h" -int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 * data, - yaffs_ExtendedTags * tags); -int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, __u8 * data, - yaffs_ExtendedTags * tags); -int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState * state, int *sequenceNumber); -int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND); -int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev); +int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, + int nand_chunk, const u8 *data, + const struct yaffs_ext_tags *tags); +int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, + int nand_chunk, u8 *data, + struct yaffs_ext_tags *tags); +int nandemul2k_MarkNANDBlockBad(struct yaffs_dev *dev, int block_no); +int nandemul2k_QueryNANDBlock(struct yaffs_dev *dev, int block_no, + enum yaffs_block_state *state, u32 *seq_number); +int nandemul2k_EraseBlockInNAND(struct yaffs_dev *dev, + int flash_block); +int nandemul2k_InitialiseNAND(struct yaffs_dev *dev); int nandemul2k_GetBytesPerChunk(void); int nandemul2k_GetChunksPerBlock(void); int nandemul2k_GetNumberOfBlocks(void); diff --git a/fs/yaffs2/yaffs_nandif.c b/fs/yaffs2/yaffs_nandif.c new file mode 100644 index 0000000..79b00ab --- /dev/null +++ b/fs/yaffs2/yaffs_nandif.c @@ -0,0 +1,251 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yportenv.h" +#include "yaffs_guts.h" + + +#include "yaffs_nandif.h" +#include "yaffs_packedtags2.h" + +#include "yramsim.h" + +#include "yaffs_trace.h" +#include "yaffsfs.h" + + +/* NB For use with inband tags.... + * We assume that the data buffer is of size totalBytersPerChunk so that + * we can also use it to load the tags. + */ +int ynandif_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, int nand_chunk, + const u8 *data, + const struct yaffs_ext_tags *tags) +{ + + int retval = 0; + struct yaffs_packed_tags2 pt; + void *spare; + unsigned spareSize = 0; + struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); + + yaffs_trace(YAFFS_TRACE_MTD, + "nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p", + nand_chunk, data, tags); + + + /* For yaffs2 writing there must be both data and tags. + * If we're using inband tags, then the tags are stuffed into + * the end of the data buffer. + */ + + if (dev->param.inband_tags) { + struct yaffs_packed_tags2_tags_only *pt2tp; + + pt2tp = (struct yaffs_packed_tags2_tags_only *) + (data + dev->data_bytes_per_chunk); + yaffs_pack_tags2_tags_only(pt2tp, tags); + spare = NULL; + spareSize = 0; + } else { + yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc); + spare = &pt; + spareSize = sizeof(struct yaffs_packed_tags2); + } + + retval = geometry->writeChunk(dev, nand_chunk, + data, dev->param.total_bytes_per_chunk, + spare, spareSize); + + return retval; +} + +int ynandif_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, int nand_chunk, + u8 *data, struct yaffs_ext_tags *tags) +{ + struct yaffs_packed_tags2 pt; + int localData = 0; + void *spare = NULL; + unsigned spareSize; + int retval = 0; + int eccStatus; /* 0 = ok, 1 = fixed, -1 = unfixed */ + struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); + + yaffs_trace(YAFFS_TRACE_MTD, + "nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p", + nand_chunk, data, tags); + + if (!tags) { + spare = NULL; + spareSize = 0; + } else if (dev->param.inband_tags) { + + if (!data) { + localData = 1; + data = yaffs_get_temp_buffer(dev); + } + spare = NULL; + spareSize = 0; + } else { + spare = &pt; + spareSize = sizeof(struct yaffs_packed_tags2); + } + + retval = geometry->readChunk(dev, nand_chunk, + data, + data ? dev->param.total_bytes_per_chunk : 0, + spare, spareSize, + &eccStatus); + + if (dev->param.inband_tags) { + if (tags) { + struct yaffs_packed_tags2_tags_only *pt2tp; + pt2tp = (struct yaffs_packed_tags2_tags_only *) + &data[dev->data_bytes_per_chunk]; + yaffs_unpack_tags2_tags_only(tags, pt2tp); + } + } else { + if (tags) + yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); + } + + if (tags && tags->chunk_used) { + if (eccStatus < 0 || + tags->ecc_result == YAFFS_ECC_RESULT_UNFIXED) + tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; + else if (eccStatus > 0 || + tags->ecc_result == YAFFS_ECC_RESULT_FIXED) + tags->ecc_result = YAFFS_ECC_RESULT_FIXED; + else + tags->ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + } + + if (localData) + yaffs_release_temp_buffer(dev, data); + + return retval; +} + +int ynandif_MarkNANDBlockBad(struct yaffs_dev *dev, int blockId) +{ + struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); + + return geometry->markBlockBad(dev, blockId); +} + +int ynandif_EraseBlockInNAND(struct yaffs_dev *dev, int blockId) +{ + struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); + + return geometry->eraseBlock(dev, blockId); + +} + + +static int ynandif_IsBlockOk(struct yaffs_dev *dev, int blockId) +{ + struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); + + return geometry->checkBlockOk(dev, blockId); +} + +int ynandif_QueryNANDBlock(struct yaffs_dev *dev, int blockId, + enum yaffs_block_state *state, u32 *seq_number) +{ + unsigned chunkNo; + struct yaffs_ext_tags tags; + + *seq_number = 0; + + chunkNo = blockId * dev->param.chunks_per_block; + + if (!ynandif_IsBlockOk(dev, blockId)) { + *state = YAFFS_BLOCK_STATE_DEAD; + } else { + ynandif_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &tags); + + if (!tags.chunk_used) { + *state = YAFFS_BLOCK_STATE_EMPTY; + } else { + *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; + *seq_number = tags.seq_number; + } + } + + return YAFFS_OK; +} + + +int ynandif_InitialiseNAND(struct yaffs_dev *dev) +{ + struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); + + geometry->initialise(dev); + + return YAFFS_OK; +} + +int ynandif_Deinitialise_flash_fn(struct yaffs_dev *dev) +{ + struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context); + + geometry->deinitialise(dev); + + return YAFFS_OK; +} + + +struct yaffs_dev * + yaffs_add_dev_from_geometry(const YCHAR *name, + const struct ynandif_Geometry *geometry) +{ + YCHAR *clonedName = malloc(sizeof(YCHAR) * + (strnlen(name, YAFFS_MAX_NAME_LENGTH)+1)); + struct yaffs_dev *dev = malloc(sizeof(struct yaffs_dev)); + struct yaffs_param *param; + + if (dev && clonedName) { + memset(dev, 0, sizeof(struct yaffs_dev)); + strcpy(clonedName, name); + + param = &dev->param; + + param->name = clonedName; + param->write_chunk_tags_fn = ynandif_WriteChunkWithTagsToNAND; + param->read_chunk_tags_fn = ynandif_ReadChunkWithTagsFromNAND; + param->erase_fn = ynandif_EraseBlockInNAND; + param->initialise_flash_fn = ynandif_InitialiseNAND; + param->query_block_fn = ynandif_QueryNANDBlock; + param->bad_block_fn = ynandif_MarkNANDBlockBad; + param->n_caches = 20; + param->start_block = geometry->start_block; + param->end_block = geometry->end_block; + param->total_bytes_per_chunk = geometry->dataSize; + param->spare_bytes_per_chunk = geometry->spareSize; + param->inband_tags = geometry->inband_tags; + param->chunks_per_block = geometry->pagesPerBlock; + param->use_nand_ecc = geometry->hasECC; + param->is_yaffs2 = geometry->useYaffs2; + param->n_reserved_blocks = 5; + dev->driver_context = (void *)geometry; + + yaffs_add_device(dev); + + return dev; + } + + free(dev); + free(clonedName); + + return NULL; +} diff --git a/fs/yaffs2/yaffs_nandif.h b/fs/yaffs2/yaffs_nandif.h new file mode 100644 index 0000000..e780f7f --- /dev/null +++ b/fs/yaffs2/yaffs_nandif.h @@ -0,0 +1,65 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + + +#ifndef __YNANDIF_H__ +#define __YNANDIF_H__ + +#include "yaffs_guts.h" + +struct ynandif_Geometry { + unsigned start_block; + unsigned end_block; + unsigned dataSize; + unsigned spareSize; + unsigned pagesPerBlock; + unsigned hasECC; + unsigned inband_tags; + unsigned useYaffs2; + + int (*initialise)(struct yaffs_dev *dev); + int (*deinitialise)(struct yaffs_dev *dev); + + int (*readChunk) (struct yaffs_dev *dev, + unsigned pageId, + unsigned char *data, + unsigned dataLength, + unsigned char *spare, + unsigned spareLength, + int *eccStatus); + /* ECC status is set to 0 for OK, 1 for fixed, -1 for unfixed. */ + + int (*writeChunk)(struct yaffs_dev *dev, + unsigned pageId, + const unsigned char *data, + unsigned dataLength, + const unsigned char *spare, + unsigned spareLength); + + int (*eraseBlock)(struct yaffs_dev *dev, unsigned blockId); + + int (*checkBlockOk)(struct yaffs_dev *dev, unsigned blockId); + int (*markBlockBad)(struct yaffs_dev *dev, unsigned blockId); + + void *privateData; + +}; + +struct yaffs_dev * + yaffs_add_dev_from_geometry(const YCHAR *name, + const struct ynandif_Geometry *geometry); + + +#endif diff --git a/fs/yaffs2/yaffs_tagsvalidity.h b/fs/yaffs2/yaffs_osglue.h index 2fd0c24..f629a4b 100644 --- a/fs/yaffs2/yaffs_tagsvalidity.h +++ b/fs/yaffs2/yaffs_osglue.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -13,12 +13,29 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ +/* + * Header file for using yaffs in an application via + * a direct interface. + */ + + +#ifndef __YAFFS_OSGLUE_H__ +#define __YAFFS_OSGLUE_H__ + + +#include "yportenv.h" + +void yaffsfs_Lock(void); +void yaffsfs_Unlock(void); + +u32 yaffsfs_CurrentTime(void); + +void yaffsfs_SetError(int err); + +void *yaffsfs_malloc(size_t size); +void yaffsfs_free(void *ptr); -#ifndef __YAFFS_TAGS_VALIDITY_H__ -#define __YAFFS_TAGS_VALIDITY_H__ +void yaffsfs_OSInitialisation(void); -#include "yaffs_guts.h" -void yaffs_InitialiseTags(yaffs_ExtendedTags * tags); -int yaffs_ValidateTags(yaffs_ExtendedTags * tags); #endif diff --git a/fs/yaffs2/yaffs_packedtags1.c b/fs/yaffs2/yaffs_packedtags1.c index a149431..dd9a331 100644 --- a/fs/yaffs2/yaffs_packedtags1.c +++ b/fs/yaffs2/yaffs_packedtags1.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,45 +11,46 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> - #include "yaffs_packedtags1.h" #include "yportenv.h" -void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t) +static const u8 all_ff[20] = { + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff +}; + +void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt, + const struct yaffs_ext_tags *t) { - pt->chunkId = t->chunkId; - pt->serialNumber = t->serialNumber; - pt->byteCount = t->byteCount; - pt->objectId = t->objectId; + pt->chunk_id = t->chunk_id; + pt->serial_number = t->serial_number; + pt->n_bytes = t->n_bytes; + pt->obj_id = t->obj_id; pt->ecc = 0; - pt->deleted = (t->chunkDeleted) ? 0 : 1; - pt->unusedStuff = 0; - pt->shouldBeFF = 0xFFFFFFFF; - + pt->deleted = (t->is_deleted) ? 0 : 1; + pt->unused_stuff = 0; + pt->should_be_ff = 0xffffffff; } -void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt) +void yaffs_unpack_tags1(struct yaffs_ext_tags *t, + const struct yaffs_packed_tags1 *pt) { - static const __u8 allFF[] = - { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, -0xff }; - if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) { - t->blockBad = 0; - if (pt->shouldBeFF != 0xFFFFFFFF) { - t->blockBad = 1; - } - t->chunkUsed = 1; - t->objectId = pt->objectId; - t->chunkId = pt->chunkId; - t->byteCount = pt->byteCount; - t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; - t->chunkDeleted = (pt->deleted) ? 0 : 1; - t->serialNumber = pt->serialNumber; + if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) { + t->block_bad = 0; + if (pt->should_be_ff != 0xffffffff) + t->block_bad = 1; + t->chunk_used = 1; + t->obj_id = pt->obj_id; + t->chunk_id = pt->chunk_id; + t->n_bytes = pt->n_bytes; + t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + t->is_deleted = (pt->deleted) ? 0 : 1; + t->serial_number = pt->serial_number; } else { - memset(t, 0, sizeof(yaffs_ExtendedTags)); - + memset(t, 0, sizeof(struct yaffs_ext_tags)); } } diff --git a/fs/yaffs2/yaffs_packedtags1.h b/fs/yaffs2/yaffs_packedtags1.h index 776c5c2..b80f0a5 100644 --- a/fs/yaffs2/yaffs_packedtags1.h +++ b/fs/yaffs2/yaffs_packedtags1.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -20,18 +20,20 @@ #include "yaffs_guts.h" -typedef struct { - unsigned chunkId:20; - unsigned serialNumber:2; - unsigned byteCount:10; - unsigned objectId:18; +struct yaffs_packed_tags1 { + unsigned chunk_id:20; + unsigned serial_number:2; + unsigned n_bytes:10; + unsigned obj_id:18; unsigned ecc:12; unsigned deleted:1; - unsigned unusedStuff:1; - unsigned shouldBeFF; + unsigned unused_stuff:1; + unsigned should_be_ff; -} yaffs_PackedTags1; +}; -void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t); -void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt); +void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt, + const struct yaffs_ext_tags *t); +void yaffs_unpack_tags1(struct yaffs_ext_tags *t, + const struct yaffs_packed_tags1 *pt); #endif diff --git a/fs/yaffs2/yaffs_packedtags2.c b/fs/yaffs2/yaffs_packedtags2.c index 4744009..e1d18cc 100644 --- a/fs/yaffs2/yaffs_packedtags2.c +++ b/fs/yaffs2/yaffs_packedtags2.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,12 +11,9 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> - #include "yaffs_packedtags2.h" #include "yportenv.h" -#include "yaffs_tagsvalidity.h" +#include "yaffs_trace.h" /* This code packs a set of extended tags into a binary structure for * NAND storage @@ -27,159 +24,174 @@ * This is defined by having the EXTRA_HEADER_INFO_FLAG set. */ -/* Extra flags applied to chunkId */ +/* Extra flags applied to chunk_id */ #define EXTRA_HEADER_INFO_FLAG 0x80000000 #define EXTRA_SHRINK_FLAG 0x40000000 #define EXTRA_SHADOWS_FLAG 0x20000000 #define EXTRA_SPARE_FLAGS 0x10000000 -#define ALL_EXTRA_FLAGS 0xF0000000 +#define ALL_EXTRA_FLAGS 0xf0000000 /* Also, the top 4 bits of the object Id are set to the object type. */ #define EXTRA_OBJECT_TYPE_SHIFT (28) -#define EXTRA_OBJECT_TYPE_MASK ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT) +#define EXTRA_OBJECT_TYPE_MASK ((0x0f) << EXTRA_OBJECT_TYPE_SHIFT) -static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 * pt) +static void yaffs_dump_packed_tags2_tags_only( + const struct yaffs_packed_tags2_tags_only *ptt) { - T(YAFFS_TRACE_MTD, - (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR), - pt->t.objectId, pt->t.chunkId, pt->t.byteCount, - pt->t.sequenceNumber)); + yaffs_trace(YAFFS_TRACE_MTD, + "packed tags obj %d chunk %d byte %d seq %d", + ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number); } -static void yaffs_DumpTags2(const yaffs_ExtendedTags * t) +static void yaffs_dump_packed_tags2(const struct yaffs_packed_tags2 *pt) { - T(YAFFS_TRACE_MTD, - (TSTR - ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte " - "%d del %d ser %d seq %d" - TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId, - t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber, - t->sequenceNumber)); - + yaffs_dump_packed_tags2_tags_only(&pt->t); } -void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t) +static void yaffs_dump_tags2(const struct yaffs_ext_tags *t) { - pt->t.chunkId = t->chunkId; - pt->t.sequenceNumber = t->sequenceNumber; - pt->t.byteCount = t->byteCount; - pt->t.objectId = t->objectId; + yaffs_trace(YAFFS_TRACE_MTD, + "ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d", + t->ecc_result, t->block_bad, t->chunk_used, t->obj_id, + t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number, + t->seq_number); - if (t->chunkId == 0 && t->extraHeaderInfoAvailable) { - /* Store the extra header info instead */ - /* We save the parent object in the chunkId */ - pt->t.chunkId = EXTRA_HEADER_INFO_FLAG - | t->extraParentObjectId; - if (t->extraIsShrinkHeader) { - pt->t.chunkId |= EXTRA_SHRINK_FLAG; - } - if (t->extraShadows) { - pt->t.chunkId |= EXTRA_SHADOWS_FLAG; - } +} - pt->t.objectId &= ~EXTRA_OBJECT_TYPE_MASK; - pt->t.objectId |= - (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT); +static int yaffs_check_tags_extra_packable(const struct yaffs_ext_tags *t) +{ + if (t->chunk_id != 0 || !t->extra_available) + return 0; + + /* Check if the file size is too long to store */ + if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE && + (t->extra_file_size >> 31) != 0) + return 0; + return 1; +} - if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) { - pt->t.byteCount = t->extraEquivalentObjectId; - } else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE) { - pt->t.byteCount = t->extraFileLength; - } else { - pt->t.byteCount = 0; - } +void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *ptt, + const struct yaffs_ext_tags *t) +{ + ptt->chunk_id = t->chunk_id; + ptt->seq_number = t->seq_number; + ptt->n_bytes = t->n_bytes; + ptt->obj_id = t->obj_id; + + /* Only store extra tags for object headers. + * If it is a file then only store if the file size is short\ + * enough to fit. + */ + if (yaffs_check_tags_extra_packable(t)) { + /* Store the extra header info instead */ + /* We save the parent object in the chunk_id */ + ptt->chunk_id = EXTRA_HEADER_INFO_FLAG | t->extra_parent_id; + if (t->extra_is_shrink) + ptt->chunk_id |= EXTRA_SHRINK_FLAG; + if (t->extra_shadows) + ptt->chunk_id |= EXTRA_SHADOWS_FLAG; + + ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; + ptt->obj_id |= (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT); + + if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) + ptt->n_bytes = t->extra_equiv_id; + else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE) + ptt->n_bytes = (unsigned) t->extra_file_size; + else + ptt->n_bytes = 0; } - yaffs_DumpPackedTags2(pt); - yaffs_DumpTags2(t); - -#ifndef YAFFS_IGNORE_TAGS_ECC - { - yaffs_ECCCalculateOther((unsigned char *)&pt->t, - sizeof(yaffs_PackedTags2TagsPart), - &pt->ecc); - } -#endif + yaffs_dump_packed_tags2_tags_only(ptt); + yaffs_dump_tags2(t); } -void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt) +void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt, + const struct yaffs_ext_tags *t, int tags_ecc) { + yaffs_pack_tags2_tags_only(&pt->t, t); - memset(t, 0, sizeof(yaffs_ExtendedTags)); + if (tags_ecc) + yaffs_ecc_calc_other((unsigned char *)&pt->t, + sizeof(struct yaffs_packed_tags2_tags_only), + &pt->ecc); +} - yaffs_InitialiseTags(t); +void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t, + struct yaffs_packed_tags2_tags_only *ptt) +{ + memset(t, 0, sizeof(struct yaffs_ext_tags)); + + if (ptt->seq_number == 0xffffffff) + return; + + t->block_bad = 0; + t->chunk_used = 1; + t->obj_id = ptt->obj_id; + t->chunk_id = ptt->chunk_id; + t->n_bytes = ptt->n_bytes; + t->is_deleted = 0; + t->serial_number = 0; + t->seq_number = ptt->seq_number; + + /* Do extra header info stuff */ + if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) { + t->chunk_id = 0; + t->n_bytes = 0; + + t->extra_available = 1; + t->extra_parent_id = ptt->chunk_id & (~(ALL_EXTRA_FLAGS)); + t->extra_is_shrink = ptt->chunk_id & EXTRA_SHRINK_FLAG ? 1 : 0; + t->extra_shadows = ptt->chunk_id & EXTRA_SHADOWS_FLAG ? 1 : 0; + t->extra_obj_type = ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT; + t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; + + if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) + t->extra_equiv_id = ptt->n_bytes; + else + t->extra_file_size = ptt->n_bytes; + } + yaffs_dump_packed_tags2_tags_only(ptt); + yaffs_dump_tags2(t); +} - if (pt->t.sequenceNumber != 0xFFFFFFFF) { - /* Page is in use */ -#ifdef YAFFS_IGNORE_TAGS_ECC - { - t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; - } -#else - { - yaffs_ECCOther ecc; - int result; - yaffs_ECCCalculateOther((unsigned char *)&pt->t, - sizeof - (yaffs_PackedTags2TagsPart), - &ecc); - result = - yaffs_ECCCorrectOther((unsigned char *)&pt->t, - sizeof - (yaffs_PackedTags2TagsPart), - &pt->ecc, &ecc); - switch(result){ - case 0: - t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; - break; - case 1: - t->eccResult = YAFFS_ECC_RESULT_FIXED; - break; - case -1: - t->eccResult = YAFFS_ECC_RESULT_UNFIXED; - break; - default: - t->eccResult = YAFFS_ECC_RESULT_UNKNOWN; - } - } -#endif - t->blockBad = 0; - t->chunkUsed = 1; - t->objectId = pt->t.objectId; - t->chunkId = pt->t.chunkId; - t->byteCount = pt->t.byteCount; - t->chunkDeleted = 0; - t->serialNumber = 0; - t->sequenceNumber = pt->t.sequenceNumber; - - /* Do extra header info stuff */ - - if (pt->t.chunkId & EXTRA_HEADER_INFO_FLAG) { - t->chunkId = 0; - t->byteCount = 0; - - t->extraHeaderInfoAvailable = 1; - t->extraParentObjectId = - pt->t.chunkId & (~(ALL_EXTRA_FLAGS)); - t->extraIsShrinkHeader = - (pt->t.chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0; - t->extraShadows = - (pt->t.chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0; - t->extraObjectType = - pt->t.objectId >> EXTRA_OBJECT_TYPE_SHIFT; - t->objectId &= ~EXTRA_OBJECT_TYPE_MASK; - - if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) { - t->extraEquivalentObjectId = pt->t.byteCount; - } else { - t->extraFileLength = pt->t.byteCount; - } +void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt, + int tags_ecc) +{ + enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + + if (pt->t.seq_number != 0xffffffff && tags_ecc) { + /* Chunk is in use and we need to do ECC */ + + struct yaffs_ecc_other ecc; + int result; + yaffs_ecc_calc_other((unsigned char *)&pt->t, + sizeof(struct yaffs_packed_tags2_tags_only), + &ecc); + result = + yaffs_ecc_correct_other((unsigned char *)&pt->t, + sizeof(struct yaffs_packed_tags2_tags_only), + &pt->ecc, &ecc); + switch (result) { + case 0: + ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + break; + case 1: + ecc_result = YAFFS_ECC_RESULT_FIXED; + break; + case -1: + ecc_result = YAFFS_ECC_RESULT_UNFIXED; + break; + default: + ecc_result = YAFFS_ECC_RESULT_UNKNOWN; } } + yaffs_unpack_tags2_tags_only(t, &pt->t); - yaffs_DumpPackedTags2(pt); - yaffs_DumpTags2(t); + t->ecc_result = ecc_result; + yaffs_dump_packed_tags2(pt); + yaffs_dump_tags2(t); } diff --git a/fs/yaffs2/yaffs_packedtags2.h b/fs/yaffs2/yaffs_packedtags2.h index c2242ff..675e719 100644 --- a/fs/yaffs2/yaffs_packedtags2.h +++ b/fs/yaffs2/yaffs_packedtags2.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -21,18 +21,27 @@ #include "yaffs_guts.h" #include "yaffs_ecc.h" -typedef struct { - unsigned sequenceNumber; - unsigned objectId; - unsigned chunkId; - unsigned byteCount; -} yaffs_PackedTags2TagsPart; +struct yaffs_packed_tags2_tags_only { + unsigned seq_number; + unsigned obj_id; + unsigned chunk_id; + unsigned n_bytes; +}; -typedef struct { - yaffs_PackedTags2TagsPart t; - yaffs_ECCOther ecc; -} yaffs_PackedTags2; +struct yaffs_packed_tags2 { + struct yaffs_packed_tags2_tags_only t; + struct yaffs_ecc_other ecc; +}; -void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t); -void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt); +/* Full packed tags with ECC, used for oob tags */ +void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt, + const struct yaffs_ext_tags *t, int tags_ecc); +void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt, + int tags_ecc); + +/* Only the tags part (no ECC for use with inband tags */ +void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt, + const struct yaffs_ext_tags *t); +void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t, + struct yaffs_packed_tags2_tags_only *pt); #endif diff --git a/fs/yaffs2/yaffs_qsort.c b/fs/yaffs2/yaffs_qsort.c index 4d56f96..afd1ffa 100644 --- a/fs/yaffs2/yaffs_qsort.c +++ b/fs/yaffs2/yaffs_qsort.c @@ -27,58 +27,56 @@ * SUCH DAMAGE. */ -/* XXX U-BOOT XXX */ -#include <common.h> - #include "yportenv.h" -//#include <linux/string.h> +/* #include <linux/string.h> */ /* * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". */ -#define swapcode(TYPE, parmi, parmj, n) { \ - long i = (n) / sizeof (TYPE); \ - register TYPE *pi = (TYPE *) (parmi); \ - register TYPE *pj = (TYPE *) (parmj); \ - do { \ +#define swapcode(TYPE, parmi, parmj, n) do { \ + long i = (n) / sizeof(TYPE); \ + register TYPE *pi = (TYPE *) (parmi); \ + register TYPE *pj = (TYPE *) (parmj); \ + do { \ register TYPE t = *pi; \ *pi++ = *pj; \ *pj++ = t; \ } while (--i > 0); \ -} +} while (0) #define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ - es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1; + es % sizeof(long) ? 2 : es == sizeof(long) ? 0 : 1; -static __inline void +static inline void swapfunc(char *a, char *b, int n, int swaptype) { if (swaptype <= 1) - swapcode(long, a, b, n) + swapcode(long, a, b, n); else - swapcode(char, a, b, n) + swapcode(char, a, b, n); } -#define swap(a, b) \ +#define yswap(a, b) do { \ if (swaptype == 0) { \ long t = *(long *)(a); \ *(long *)(a) = *(long *)(b); \ *(long *)(b) = t; \ } else \ - swapfunc(a, b, es, swaptype) + swapfunc(a, b, es, swaptype); \ +} while (0) -#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) +#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) -static __inline char * +static inline char * med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *)) { return cmp(a, b) < 0 ? - (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a )) - :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c )); + (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a)) + : (cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c)); } #ifndef min -#define min(a,b) (((a) < (b)) ? (a) : (b)) +#define min(a, b) (((a) < (b)) ? (a) : (b)) #endif void @@ -95,7 +93,7 @@ loop: SWAPINIT(a, es); for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es) for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; pl -= es) - swap(pl, pl - es); + yswap(pl, pl - es); return; } pm = (char *)a + (n / 2) * es; @@ -110,7 +108,7 @@ loop: SWAPINIT(a, es); } pm = med3(pl, pm, pn, cmp); } - swap(a, pm); + yswap(a, pm); pa = pb = (char *)a + es; pc = pd = (char *)a + (n - 1) * es; @@ -118,7 +116,7 @@ loop: SWAPINIT(a, es); while (pb <= pc && (r = cmp(pb, a)) <= 0) { if (r == 0) { swap_cnt = 1; - swap(pa, pb); + yswap(pa, pb); pa += es; } pb += es; @@ -126,14 +124,14 @@ loop: SWAPINIT(a, es); while (pb <= pc && (r = cmp(pc, a)) >= 0) { if (r == 0) { swap_cnt = 1; - swap(pc, pd); + yswap(pc, pd); pd -= es; } pc -= es; } if (pb > pc) break; - swap(pb, pc); + yswap(pb, pc); swap_cnt = 1; pb += es; pc -= es; @@ -142,7 +140,7 @@ loop: SWAPINIT(a, es); for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es) for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; pl -= es) - swap(pl, pl - es); + yswap(pl, pl - es); return; } @@ -151,9 +149,11 @@ loop: SWAPINIT(a, es); vecswap(a, pb - r, r); r = min((long)(pd - pc), (long)(pn - pd - es)); vecswap(pb, pn - r, r); - if ((r = pb - pa) > es) + r = pb - pa; + if (r > es) yaffs_qsort(a, r / es, es, cmp); - if ((r = pd - pc) > es) { + r = pd - pc; + if (r > es) { /* Iterate rather than recurse to save stack space */ a = pn - r; n = r / es; diff --git a/fs/yaffs2/yaffs_ramdisk.h b/fs/yaffs2/yaffs_ramdisk.h deleted file mode 100644 index 3cff8be..0000000 --- a/fs/yaffs2/yaffs_ramdisk.h +++ /dev/null @@ -1,32 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * yaffs_ramdisk.h: yaffs ram disk component - */ - -#ifndef __YAFFS_RAMDISK_H__ -#define __YAFFS_RAMDISK_H__ - - -#include "yaffs_guts.h" -int yramdisk_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int yramdisk_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_ExtendedTags *tags); -int yramdisk_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags); -int yramdisk_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int yramdisk_InitialiseNAND(yaffs_Device *dev); -int yramdisk_MarkNANDBlockBad(yaffs_Device *dev,int blockNumber); -int yramdisk_QueryNANDBlock(yaffs_Device *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber); -#endif diff --git a/fs/yaffs2/yaffs_summary.c b/fs/yaffs2/yaffs_summary.c new file mode 100644 index 0000000..6f3c783 --- /dev/null +++ b/fs/yaffs2/yaffs_summary.c @@ -0,0 +1,313 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* Summaries write the useful part of the tags for the chunks in a block into an + * an array which is written to the last n chunks of the block. + * Reading the summaries gives all the tags for the block in one read. Much + * faster. + * + * Chunks holding summaries are marked with tags making it look like + * they are part of a fake file. + * + * The summary could also be used during gc. + * + */ + +#include "yaffs_summary.h" +#include "yaffs_packedtags2.h" +#include "yaffs_nand.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_bitmap.h" + +/* + * The summary is built up in an array of summary tags. + * This gets written to the last one or two (maybe more) chunks in a block. + * A summary header is written as the first part of each chunk of summary data. + * The summary header must match or the summary is rejected. + */ + +/* Summary tags don't need the sequence number because that is redundant. */ +struct yaffs_summary_tags { + unsigned obj_id; + unsigned chunk_id; + unsigned n_bytes; +}; + +/* Summary header */ +struct yaffs_summary_header { + unsigned version; /* Must match current version */ + unsigned block; /* Must be this block */ + unsigned seq; /* Must be this sequence number */ + unsigned sum; /* Just add up all the bytes in the tags */ +}; + + +static void yaffs_summary_clear(struct yaffs_dev *dev) +{ + if (!dev->sum_tags) + return; + memset(dev->sum_tags, 0, dev->chunks_per_summary * + sizeof(struct yaffs_summary_tags)); +} + + +void yaffs_summary_deinit(struct yaffs_dev *dev) +{ + kfree(dev->sum_tags); + dev->sum_tags = NULL; + kfree(dev->gc_sum_tags); + dev->gc_sum_tags = NULL; + dev->chunks_per_summary = 0; +} + +int yaffs_summary_init(struct yaffs_dev *dev) +{ + int sum_bytes; + int chunks_used; /* Number of chunks used by summary */ + int sum_tags_bytes; + + sum_bytes = dev->param.chunks_per_block * + sizeof(struct yaffs_summary_tags); + + chunks_used = (sum_bytes + dev->data_bytes_per_chunk - 1)/ + (dev->data_bytes_per_chunk - + sizeof(struct yaffs_summary_header)); + + dev->chunks_per_summary = dev->param.chunks_per_block - chunks_used; + sum_tags_bytes = sizeof(struct yaffs_summary_tags) * + dev->chunks_per_summary; + dev->sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS); + dev->gc_sum_tags = kmalloc(sum_tags_bytes, GFP_NOFS); + if (!dev->sum_tags || !dev->gc_sum_tags) { + yaffs_summary_deinit(dev); + return YAFFS_FAIL; + } + + yaffs_summary_clear(dev); + + return YAFFS_OK; +} + +static unsigned yaffs_summary_sum(struct yaffs_dev *dev) +{ + u8 *sum_buffer = (u8 *)dev->sum_tags; + int i; + unsigned sum = 0; + + i = sizeof(struct yaffs_summary_tags) * + dev->chunks_per_summary; + while (i > 0) { + sum += *sum_buffer; + sum_buffer++; + i--; + } + + return sum; +} + +static int yaffs_summary_write(struct yaffs_dev *dev, int blk) +{ + struct yaffs_ext_tags tags; + u8 *buffer; + u8 *sum_buffer = (u8 *)dev->sum_tags; + int n_bytes; + int chunk_in_nand; + int chunk_in_block; + int result; + int this_tx; + struct yaffs_summary_header hdr; + int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr); + struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk); + + buffer = yaffs_get_temp_buffer(dev); + n_bytes = sizeof(struct yaffs_summary_tags) * + dev->chunks_per_summary; + memset(&tags, 0, sizeof(struct yaffs_ext_tags)); + tags.obj_id = YAFFS_OBJECTID_SUMMARY; + tags.chunk_id = 1; + chunk_in_block = dev->chunks_per_summary; + chunk_in_nand = dev->alloc_block * dev->param.chunks_per_block + + dev->chunks_per_summary; + hdr.version = YAFFS_SUMMARY_VERSION; + hdr.block = blk; + hdr.seq = bi->seq_number; + hdr.sum = yaffs_summary_sum(dev); + + do { + this_tx = n_bytes; + if (this_tx > sum_bytes_per_chunk) + this_tx = sum_bytes_per_chunk; + memcpy(buffer, &hdr, sizeof(hdr)); + memcpy(buffer + sizeof(hdr), sum_buffer, this_tx); + tags.n_bytes = this_tx + sizeof(hdr); + result = yaffs_wr_chunk_tags_nand(dev, chunk_in_nand, + buffer, &tags); + + if (result != YAFFS_OK) + break; + yaffs_set_chunk_bit(dev, blk, chunk_in_block); + bi->pages_in_use++; + dev->n_free_chunks--; + + n_bytes -= this_tx; + sum_buffer += this_tx; + chunk_in_nand++; + chunk_in_block++; + tags.chunk_id++; + } while (result == YAFFS_OK && n_bytes > 0); + yaffs_release_temp_buffer(dev, buffer); + + + if (result == YAFFS_OK) + bi->has_summary = 1; + + + return result; +} + +int yaffs_summary_read(struct yaffs_dev *dev, + struct yaffs_summary_tags *st, + int blk) +{ + struct yaffs_ext_tags tags; + u8 *buffer; + u8 *sum_buffer = (u8 *)st; + int n_bytes; + int chunk_id; + int chunk_in_nand; + int chunk_in_block; + int result; + int this_tx; + struct yaffs_summary_header hdr; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk); + int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr); + int sum_tags_bytes; + + sum_tags_bytes = sizeof(struct yaffs_summary_tags) * + dev->chunks_per_summary; + buffer = yaffs_get_temp_buffer(dev); + n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary; + chunk_in_block = dev->chunks_per_summary; + chunk_in_nand = blk * dev->param.chunks_per_block + + dev->chunks_per_summary; + chunk_id = 1; + do { + this_tx = n_bytes; + if (this_tx > sum_bytes_per_chunk) + this_tx = sum_bytes_per_chunk; + result = yaffs_rd_chunk_tags_nand(dev, chunk_in_nand, + buffer, &tags); + + if (tags.chunk_id != chunk_id || + tags.obj_id != YAFFS_OBJECTID_SUMMARY || + tags.chunk_used == 0 || + tags.ecc_result > YAFFS_ECC_RESULT_FIXED || + tags.n_bytes != (this_tx + sizeof(hdr))) + result = YAFFS_FAIL; + if (result != YAFFS_OK) + break; + + if (st == dev->sum_tags) { + /* If we're scanning then update the block info */ + yaffs_set_chunk_bit(dev, blk, chunk_in_block); + bi->pages_in_use++; + } + memcpy(&hdr, buffer, sizeof(hdr)); + memcpy(sum_buffer, buffer + sizeof(hdr), this_tx); + n_bytes -= this_tx; + sum_buffer += this_tx; + chunk_in_nand++; + chunk_in_block++; + chunk_id++; + } while (result == YAFFS_OK && n_bytes > 0); + yaffs_release_temp_buffer(dev, buffer); + + if (result == YAFFS_OK) { + /* Verify header */ + if (hdr.version != YAFFS_SUMMARY_VERSION || + hdr.block != blk || + hdr.seq != bi->seq_number || + hdr.sum != yaffs_summary_sum(dev)) + result = YAFFS_FAIL; + } + + if (st == dev->sum_tags && result == YAFFS_OK) + bi->has_summary = 1; + + return result; +} + +int yaffs_summary_add(struct yaffs_dev *dev, + struct yaffs_ext_tags *tags, + int chunk_in_nand) +{ + struct yaffs_packed_tags2_tags_only tags_only; + struct yaffs_summary_tags *sum_tags; + int block_in_nand = chunk_in_nand / dev->param.chunks_per_block; + int chunk_in_block = chunk_in_nand % dev->param.chunks_per_block; + + if (!dev->sum_tags) + return YAFFS_OK; + + if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) { + yaffs_pack_tags2_tags_only(&tags_only, tags); + sum_tags = &dev->sum_tags[chunk_in_block]; + sum_tags->chunk_id = tags_only.chunk_id; + sum_tags->n_bytes = tags_only.n_bytes; + sum_tags->obj_id = tags_only.obj_id; + + if (chunk_in_block == dev->chunks_per_summary - 1) { + /* Time to write out the summary */ + yaffs_summary_write(dev, block_in_nand); + yaffs_summary_clear(dev); + yaffs_skip_rest_of_block(dev); + } + } + return YAFFS_OK; +} + +int yaffs_summary_fetch(struct yaffs_dev *dev, + struct yaffs_ext_tags *tags, + int chunk_in_block) +{ + struct yaffs_packed_tags2_tags_only tags_only; + struct yaffs_summary_tags *sum_tags; + if (chunk_in_block >= 0 && chunk_in_block < dev->chunks_per_summary) { + sum_tags = &dev->sum_tags[chunk_in_block]; + tags_only.chunk_id = sum_tags->chunk_id; + tags_only.n_bytes = sum_tags->n_bytes; + tags_only.obj_id = sum_tags->obj_id; + yaffs_unpack_tags2_tags_only(tags, &tags_only); + return YAFFS_OK; + } + return YAFFS_FAIL; +} + +void yaffs_summary_gc(struct yaffs_dev *dev, int blk) +{ + struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk); + int i; + + if (!bi->has_summary) + return; + + for (i = dev->chunks_per_summary; + i < dev->param.chunks_per_block; + i++) { + if (yaffs_check_chunk_bit(dev, blk, i)) { + yaffs_clear_chunk_bit(dev, blk, i); + bi->pages_in_use--; + dev->n_free_chunks++; + } + } +} diff --git a/fs/yaffs2/yaffs_summary.h b/fs/yaffs2/yaffs_summary.h new file mode 100644 index 0000000..be141d0 --- /dev/null +++ b/fs/yaffs2/yaffs_summary.h @@ -0,0 +1,37 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_SUMMARY_H__ +#define __YAFFS_SUMMARY_H__ + +#include "yaffs_packedtags2.h" + + +int yaffs_summary_init(struct yaffs_dev *dev); +void yaffs_summary_deinit(struct yaffs_dev *dev); + +int yaffs_summary_add(struct yaffs_dev *dev, + struct yaffs_ext_tags *tags, + int chunk_in_block); +int yaffs_summary_fetch(struct yaffs_dev *dev, + struct yaffs_ext_tags *tags, + int chunk_in_block); +int yaffs_summary_read(struct yaffs_dev *dev, + struct yaffs_summary_tags *st, + int blk); +void yaffs_summary_gc(struct yaffs_dev *dev, int blk); + + +#endif diff --git a/fs/yaffs2/yaffs_tagscompat.c b/fs/yaffs2/yaffs_tagscompat.c index e872323..9ac5896 100644 --- a/fs/yaffs2/yaffs_tagscompat.c +++ b/fs/yaffs2/yaffs_tagscompat.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,63 +11,27 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> - #include "yaffs_guts.h" #include "yaffs_tagscompat.h" #include "yaffs_ecc.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_trace.h" + +static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk); -static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND); -#ifdef NOTYET -static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND); -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_Spare * spare); -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_Spare * spare); -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND); -#endif - -static const char yaffs_countBitsTable[256] = { - 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 -}; - -int yaffs_CountBits(__u8 x) -{ - int retVal; - retVal = yaffs_countBitsTable[x]; - return retVal; -} /********** Tags ECC calculations *********/ -void yaffs_CalcECC(const __u8 * data, yaffs_Spare * spare) +void yaffs_calc_ecc(const u8 *data, struct yaffs_spare *spare) { - yaffs_ECCCalculate(data, spare->ecc1); - yaffs_ECCCalculate(&data[256], spare->ecc2); + yaffs_ecc_calc(data, spare->ecc1); + yaffs_ecc_calc(&data[256], spare->ecc2); } -void yaffs_CalcTagsECC(yaffs_Tags * tags) +void yaffs_calc_tags_ecc(struct yaffs_tags *tags) { /* Calculate an ecc */ - - unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; + unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; unsigned i, j; unsigned ecc = 0; unsigned bit = 0; @@ -77,34 +41,31 @@ void yaffs_CalcTagsECC(yaffs_Tags * tags) for (i = 0; i < 8; i++) { for (j = 1; j & 0xff; j <<= 1) { bit++; - if (b[i] & j) { + if (b[i] & j) ecc ^= bit; - } } } - tags->ecc = ecc; - } -int yaffs_CheckECCOnTags(yaffs_Tags * tags) +int yaffs_check_tags_ecc(struct yaffs_tags *tags) { unsigned ecc = tags->ecc; - yaffs_CalcTagsECC(tags); + yaffs_calc_tags_ecc(tags); ecc ^= tags->ecc; if (ecc && ecc <= 64) { /* TODO: Handle the failure better. Retire? */ - unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; + unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; ecc--; b[ecc / 8] ^= (1 << (ecc & 7)); /* Now recvalc the ecc */ - yaffs_CalcTagsECC(tags); + yaffs_calc_tags_ecc(tags); return 1; /* recovered error */ } else if (ecc) { @@ -112,235 +73,202 @@ int yaffs_CheckECCOnTags(yaffs_Tags * tags) /* TODO Need to do somethiong here */ return -1; /* unrecovered error */ } - return 0; } /********** Tags **********/ -static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr, - yaffs_Tags * tagsPtr) +static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr, + struct yaffs_tags *tags_ptr) { - yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; - - yaffs_CalcTagsECC(tagsPtr); - - sparePtr->tagByte0 = tu->asBytes[0]; - sparePtr->tagByte1 = tu->asBytes[1]; - sparePtr->tagByte2 = tu->asBytes[2]; - sparePtr->tagByte3 = tu->asBytes[3]; - sparePtr->tagByte4 = tu->asBytes[4]; - sparePtr->tagByte5 = tu->asBytes[5]; - sparePtr->tagByte6 = tu->asBytes[6]; - sparePtr->tagByte7 = tu->asBytes[7]; + union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr; + + yaffs_calc_tags_ecc(tags_ptr); + + spare_ptr->tb0 = tu->as_bytes[0]; + spare_ptr->tb1 = tu->as_bytes[1]; + spare_ptr->tb2 = tu->as_bytes[2]; + spare_ptr->tb3 = tu->as_bytes[3]; + spare_ptr->tb4 = tu->as_bytes[4]; + spare_ptr->tb5 = tu->as_bytes[5]; + spare_ptr->tb6 = tu->as_bytes[6]; + spare_ptr->tb7 = tu->as_bytes[7]; } -static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr, - yaffs_TagsUnion *tu) +static void yaffs_get_tags_from_spare(struct yaffs_dev *dev, + struct yaffs_spare *spare_ptr, + struct yaffs_tags *tags_ptr) { + union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr; int result; - tu->asBytes[0] = sparePtr->tagByte0; - tu->asBytes[1] = sparePtr->tagByte1; - tu->asBytes[2] = sparePtr->tagByte2; - tu->asBytes[3] = sparePtr->tagByte3; - tu->asBytes[4] = sparePtr->tagByte4; - tu->asBytes[5] = sparePtr->tagByte5; - tu->asBytes[6] = sparePtr->tagByte6; - tu->asBytes[7] = sparePtr->tagByte7; - - result = yaffs_CheckECCOnTags(&tu->asTags); - if (result > 0) { - dev->tagsEccFixed++; - } else if (result < 0) { - dev->tagsEccUnfixed++; - } + tu->as_bytes[0] = spare_ptr->tb0; + tu->as_bytes[1] = spare_ptr->tb1; + tu->as_bytes[2] = spare_ptr->tb2; + tu->as_bytes[3] = spare_ptr->tb3; + tu->as_bytes[4] = spare_ptr->tb4; + tu->as_bytes[5] = spare_ptr->tb5; + tu->as_bytes[6] = spare_ptr->tb6; + tu->as_bytes[7] = spare_ptr->tb7; + + result = yaffs_check_tags_ecc(tags_ptr); + if (result > 0) + dev->n_tags_ecc_fixed++; + else if (result < 0) + dev->n_tags_ecc_unfixed++; } -static void yaffs_SpareInitialise(yaffs_Spare * spare) +static void yaffs_spare_init(struct yaffs_spare *spare) { - memset(spare, 0xFF, sizeof(yaffs_Spare)); + memset(spare, 0xff, sizeof(struct yaffs_spare)); } -static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 * data, - yaffs_Spare * spare) +static int yaffs_wr_nand(struct yaffs_dev *dev, + int nand_chunk, const u8 *data, + struct yaffs_spare *spare) { - if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs chunk %d is not valid" TENDSTR), - chunkInNAND)); + if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs chunk %d is not valid", + nand_chunk); return YAFFS_FAIL; } - dev->nPageWrites++; - return dev->writeChunkToNAND(dev, chunkInNAND, data, spare); + return dev->param.write_chunk_fn(dev, nand_chunk, data, spare); } -static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, - __u8 * data, - yaffs_Spare * spare, - yaffs_ECCResult * eccResult, - int doErrorCorrection) +static int yaffs_rd_chunk_nand(struct yaffs_dev *dev, + int nand_chunk, + u8 *data, + struct yaffs_spare *spare, + enum yaffs_ecc_result *ecc_result, + int correct_errors) { - int retVal; - yaffs_Spare localSpare; - - dev->nPageReads++; + int ret_val; + struct yaffs_spare local_spare; - if (!spare && data) { + if (!spare) { /* If we don't have a real spare, then we use a local one. */ /* Need this for the calculation of the ecc */ - spare = &localSpare; + spare = &local_spare; } - if (!dev->useNANDECC) { - retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare); - if (data && doErrorCorrection) { + if (!dev->param.use_nand_ecc) { + ret_val = + dev->param.read_chunk_fn(dev, nand_chunk, data, spare); + if (data && correct_errors) { /* Do ECC correction */ /* Todo handle any errors */ - int eccResult1, eccResult2; - __u8 calcEcc[3]; - - yaffs_ECCCalculate(data, calcEcc); - eccResult1 = - yaffs_ECCCorrect(data, spare->ecc1, calcEcc); - yaffs_ECCCalculate(&data[256], calcEcc); - eccResult2 = - yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc); - - if (eccResult1 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error fix performed on chunk %d:0" - TENDSTR), chunkInNAND)); - dev->eccFixed++; - } else if (eccResult1 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error unfixed on chunk %d:0" - TENDSTR), chunkInNAND)); - dev->eccUnfixed++; + int ecc_result1, ecc_result2; + u8 calc_ecc[3]; + + yaffs_ecc_calc(data, calc_ecc); + ecc_result1 = + yaffs_ecc_correct(data, spare->ecc1, calc_ecc); + yaffs_ecc_calc(&data[256], calc_ecc); + ecc_result2 = + yaffs_ecc_correct(&data[256], spare->ecc2, + calc_ecc); + + if (ecc_result1 > 0) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>yaffs ecc error fix performed on chunk %d:0", + nand_chunk); + dev->n_ecc_fixed++; + } else if (ecc_result1 < 0) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>yaffs ecc error unfixed on chunk %d:0", + nand_chunk); + dev->n_ecc_unfixed++; } - if (eccResult2 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error fix performed on chunk %d:1" - TENDSTR), chunkInNAND)); - dev->eccFixed++; - } else if (eccResult2 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error unfixed on chunk %d:1" - TENDSTR), chunkInNAND)); - dev->eccUnfixed++; + if (ecc_result2 > 0) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>yaffs ecc error fix performed on chunk %d:1", + nand_chunk); + dev->n_ecc_fixed++; + } else if (ecc_result2 < 0) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>yaffs ecc error unfixed on chunk %d:1", + nand_chunk); + dev->n_ecc_unfixed++; } - if (eccResult1 || eccResult2) { + if (ecc_result1 || ecc_result2) { /* We had a data problem on this page */ - yaffs_HandleReadDataError(dev, chunkInNAND); + yaffs_handle_rd_data_error(dev, nand_chunk); } - if (eccResult1 < 0 || eccResult2 < 0) - *eccResult = YAFFS_ECC_RESULT_UNFIXED; - else if (eccResult1 > 0 || eccResult2 > 0) - *eccResult = YAFFS_ECC_RESULT_FIXED; + if (ecc_result1 < 0 || ecc_result2 < 0) + *ecc_result = YAFFS_ECC_RESULT_UNFIXED; + else if (ecc_result1 > 0 || ecc_result2 > 0) + *ecc_result = YAFFS_ECC_RESULT_FIXED; else - *eccResult = YAFFS_ECC_RESULT_NO_ERROR; + *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; } } else { /* Must allocate enough memory for spare+2*sizeof(int) */ /* for ecc results from device. */ - struct yaffs_NANDSpare nspare; - retVal = - dev->readChunkFromNAND(dev, chunkInNAND, data, - (yaffs_Spare *) & nspare); - memcpy(spare, &nspare, sizeof(yaffs_Spare)); - if (data && doErrorCorrection) { + struct yaffs_nand_spare nspare; + + memset(&nspare, 0, sizeof(nspare)); + + ret_val = dev->param.read_chunk_fn(dev, nand_chunk, data, + (struct yaffs_spare *) + &nspare); + memcpy(spare, &nspare, sizeof(struct yaffs_spare)); + if (data && correct_errors) { if (nspare.eccres1 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error fix performed on chunk %d:0" - TENDSTR), chunkInNAND)); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>mtd ecc error fix performed on chunk %d:0", + nand_chunk); } else if (nspare.eccres1 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error unfixed on chunk %d:0" - TENDSTR), chunkInNAND)); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>mtd ecc error unfixed on chunk %d:0", + nand_chunk); } if (nspare.eccres2 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error fix performed on chunk %d:1" - TENDSTR), chunkInNAND)); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>mtd ecc error fix performed on chunk %d:1", + nand_chunk); } else if (nspare.eccres2 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error unfixed on chunk %d:1" - TENDSTR), chunkInNAND)); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>mtd ecc error unfixed on chunk %d:1", + nand_chunk); } if (nspare.eccres1 || nspare.eccres2) { /* We had a data problem on this page */ - yaffs_HandleReadDataError(dev, chunkInNAND); + yaffs_handle_rd_data_error(dev, nand_chunk); } if (nspare.eccres1 < 0 || nspare.eccres2 < 0) - *eccResult = YAFFS_ECC_RESULT_UNFIXED; + *ecc_result = YAFFS_ECC_RESULT_UNFIXED; else if (nspare.eccres1 > 0 || nspare.eccres2 > 0) - *eccResult = YAFFS_ECC_RESULT_FIXED; + *ecc_result = YAFFS_ECC_RESULT_FIXED; else - *eccResult = YAFFS_ECC_RESULT_NO_ERROR; + *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; } } - return retVal; + return ret_val; } -#ifdef NOTYET -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND) -{ - - static int init = 0; - static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK]; - static __u8 data[YAFFS_BYTES_PER_CHUNK]; - /* Might as well always allocate the larger size for */ - /* dev->useNANDECC == true; */ - static __u8 spare[sizeof(struct yaffs_NANDSpare)]; - - dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare); - - if (!init) { - memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK); - init = 1; - } - - if (memcmp(cmpbuf, data, YAFFS_BYTES_PER_CHUNK)) - return YAFFS_FAIL; - if (memcmp(cmpbuf, spare, 16)) - return YAFFS_FAIL; - - return YAFFS_OK; - -} -#endif - /* * Functions for robustisizing */ -static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND) +static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk) { - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; + int flash_block = nand_chunk / dev->param.chunks_per_block; /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND)); + yaffs_get_block_info(dev, flash_block + dev->block_offset)-> + needs_retiring = 1; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>>Block %d marked for retirement", + flash_block); /* TODO: * Just do a garbage collection on the affected block @@ -349,184 +277,131 @@ static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND) */ } -#ifdef NOTYET -static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND) +int yaffs_tags_compat_wr(struct yaffs_dev *dev, + int nand_chunk, + const u8 *data, const struct yaffs_ext_tags *ext_tags) { -} + struct yaffs_spare spare; + struct yaffs_tags tags; -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_Spare * spare) -{ -} + yaffs_spare_init(&spare); -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_Spare * spare) -{ -} + if (ext_tags->is_deleted) + spare.page_status = 0; + else { + tags.obj_id = ext_tags->obj_id; + tags.chunk_id = ext_tags->chunk_id; -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND) -{ - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; - - /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; - /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); -} - -static int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1, - const yaffs_Spare * s0, const yaffs_Spare * s1) -{ - - if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 || - s0->tagByte0 != s1->tagByte0 || - s0->tagByte1 != s1->tagByte1 || - s0->tagByte2 != s1->tagByte2 || - s0->tagByte3 != s1->tagByte3 || - s0->tagByte4 != s1->tagByte4 || - s0->tagByte5 != s1->tagByte5 || - s0->tagByte6 != s1->tagByte6 || - s0->tagByte7 != s1->tagByte7 || - s0->ecc1[0] != s1->ecc1[0] || - s0->ecc1[1] != s1->ecc1[1] || - s0->ecc1[2] != s1->ecc1[2] || - s0->ecc2[0] != s1->ecc2[0] || - s0->ecc2[1] != s1->ecc2[1] || s0->ecc2[2] != s1->ecc2[2]) { - return 0; - } + tags.n_bytes_lsb = ext_tags->n_bytes & (1024 - 1); - return 1; -} -#endif /* NOTYET */ - -int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * - eTags) -{ - yaffs_Spare spare; - yaffs_Tags tags; - - yaffs_SpareInitialise(&spare); + if (dev->data_bytes_per_chunk >= 1024) + tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3; + else + tags.n_bytes_msb = 3; - if (eTags->chunkDeleted) { - spare.pageStatus = 0; - } else { - tags.objectId = eTags->objectId; - tags.chunkId = eTags->chunkId; - tags.byteCount = eTags->byteCount; - tags.serialNumber = eTags->serialNumber; + tags.serial_number = ext_tags->serial_number; - if (!dev->useNANDECC && data) { - yaffs_CalcECC(data, &spare); - } - yaffs_LoadTagsIntoSpare(&spare, &tags); + if (!dev->param.use_nand_ecc && data) + yaffs_calc_ecc(data, &spare); + yaffs_load_tags_to_spare(&spare, &tags); } - - return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare); + return yaffs_wr_nand(dev, nand_chunk, data, &spare); } -int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, - int chunkInNAND, - __u8 * data, - yaffs_ExtendedTags * eTags) +int yaffs_tags_compat_rd(struct yaffs_dev *dev, + int nand_chunk, + u8 *data, struct yaffs_ext_tags *ext_tags) { - - yaffs_Spare spare; - yaffs_TagsUnion tags; - yaffs_ECCResult eccResult; - - static yaffs_Spare spareFF; + struct yaffs_spare spare; + struct yaffs_tags tags; + enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN; + static struct yaffs_spare spare_ff; static int init; + int deleted; if (!init) { - memset(&spareFF, 0xFF, sizeof(spareFF)); + memset(&spare_ff, 0xff, sizeof(spare_ff)); init = 1; } - if (yaffs_ReadChunkFromNAND - (dev, chunkInNAND, data, &spare, &eccResult, 1)) { - /* eTags may be NULL */ - if (eTags) { - - int deleted = - (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0; - - eTags->chunkDeleted = deleted; - eTags->eccResult = eccResult; - eTags->blockBad = 0; /* We're reading it */ - /* therefore it is not a bad block */ - eTags->chunkUsed = - (memcmp(&spareFF, &spare, sizeof(spareFF)) != - 0) ? 1 : 0; - - if (eTags->chunkUsed) { - yaffs_GetTagsFromSpare(dev, &spare, &tags); - - eTags->objectId = tags.asTags.objectId; - eTags->chunkId = tags.asTags.chunkId; - eTags->byteCount = tags.asTags.byteCount; - eTags->serialNumber = tags.asTags.serialNumber; - } - } + if (!yaffs_rd_chunk_nand(dev, nand_chunk, + data, &spare, &ecc_result, 1)) + return YAFFS_FAIL; + /* ext_tags may be NULL */ + if (!ext_tags) return YAFFS_OK; - } else { - return YAFFS_FAIL; + + deleted = (hweight8(spare.page_status) < 7) ? 1 : 0; + + ext_tags->is_deleted = deleted; + ext_tags->ecc_result = ecc_result; + ext_tags->block_bad = 0; /* We're reading it */ + /* therefore it is not a bad block */ + ext_tags->chunk_used = + memcmp(&spare_ff, &spare, sizeof(spare_ff)) ? 1 : 0; + + if (ext_tags->chunk_used) { + yaffs_get_tags_from_spare(dev, &spare, &tags); + ext_tags->obj_id = tags.obj_id; + ext_tags->chunk_id = tags.chunk_id; + ext_tags->n_bytes = tags.n_bytes_lsb; + + if (dev->data_bytes_per_chunk >= 1024) + ext_tags->n_bytes |= + (((unsigned)tags.n_bytes_msb) << 10); + + ext_tags->serial_number = tags.serial_number; } + + return YAFFS_OK; } -int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, - int blockInNAND) +int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block) { + struct yaffs_spare spare; - yaffs_Spare spare; - - memset(&spare, 0xff, sizeof(yaffs_Spare)); + memset(&spare, 0xff, sizeof(struct yaffs_spare)); - spare.blockStatus = 'Y'; + spare.block_status = 'Y'; - yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL, - &spare); - yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, - NULL, &spare); + yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL, + &spare); + yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1, + NULL, &spare); return YAFFS_OK; - } -int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, - int blockNo, yaffs_BlockState * - state, - int *sequenceNumber) +int yaffs_tags_compat_query_block(struct yaffs_dev *dev, + int block_no, + enum yaffs_block_state *state, + u32 *seq_number) { - - yaffs_Spare spare0, spare1; - static yaffs_Spare spareFF; + struct yaffs_spare spare0, spare1; + static struct yaffs_spare spare_ff; static int init; - yaffs_ECCResult dummy; + enum yaffs_ecc_result dummy; if (!init) { - memset(&spareFF, 0xFF, sizeof(spareFF)); + memset(&spare_ff, 0xff, sizeof(spare_ff)); init = 1; } - *sequenceNumber = 0; + *seq_number = 0; - yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL, - &spare0, &dummy, 1); - yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL, - &spare1, &dummy, 1); + yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block, NULL, + &spare0, &dummy, 1); + yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1, + NULL, &spare1, &dummy, 1); - if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7) + if (hweight8(spare0.block_status & spare1.block_status) < 7) *state = YAFFS_BLOCK_STATE_DEAD; - else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0) + else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0) *state = YAFFS_BLOCK_STATE_EMPTY; else - *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; + *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; return YAFFS_OK; } diff --git a/fs/yaffs2/yaffs_tagscompat.h b/fs/yaffs2/yaffs_tagscompat.h index a61e3ba..b3c6655 100644 --- a/fs/yaffs2/yaffs_tagscompat.h +++ b/fs/yaffs2/yaffs_tagscompat.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -17,24 +17,20 @@ #define __YAFFS_TAGSCOMPAT_H__ #include "yaffs_guts.h" -int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * - tags); -int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, - int chunkInNAND, - __u8 * data, - yaffs_ExtendedTags * - tags); -int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, - int blockNo); -int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, - int blockNo, yaffs_BlockState * - state, int *sequenceNumber); +int yaffs_tags_compat_wr(struct yaffs_dev *dev, + int nand_chunk, + const u8 *data, const struct yaffs_ext_tags *tags); +int yaffs_tags_compat_rd(struct yaffs_dev *dev, + int nand_chunk, + u8 *data, struct yaffs_ext_tags *tags); +int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no); +int yaffs_tags_compat_query_block(struct yaffs_dev *dev, + int block_no, + enum yaffs_block_state *state, + u32 *seq_number); -void yaffs_CalcTagsECC(yaffs_Tags * tags); -int yaffs_CheckECCOnTags(yaffs_Tags * tags); -int yaffs_CountBits(__u8 byte); +void yaffs_calc_tags_ecc(struct yaffs_tags *tags); +int yaffs_check_tags_ecc(struct yaffs_tags *tags); +int yaffs_count_bits(u8 byte); #endif diff --git a/fs/yaffs2/yaffs_tagsvalidity.c b/fs/yaffs2/yaffs_tagsvalidity.c deleted file mode 100644 index f588d3a..0000000 --- a/fs/yaffs2/yaffs_tagsvalidity.c +++ /dev/null @@ -1,31 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -#include "yaffs_tagsvalidity.h" - -void yaffs_InitialiseTags(yaffs_ExtendedTags * tags) -{ - memset(tags, 0, sizeof(yaffs_ExtendedTags)); - tags->validMarker0 = 0xAAAAAAAA; - tags->validMarker1 = 0x55555555; -} - -int yaffs_ValidateTags(yaffs_ExtendedTags * tags) -{ - return (tags->validMarker0 == 0xAAAAAAAA && - tags->validMarker1 == 0x55555555); - -} diff --git a/fs/yaffs2/yaffs_trace.h b/fs/yaffs2/yaffs_trace.h new file mode 100644 index 0000000..fd26054 --- /dev/null +++ b/fs/yaffs2/yaffs_trace.h @@ -0,0 +1,57 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YTRACE_H__ +#define __YTRACE_H__ + +extern unsigned int yaffs_trace_mask; +extern unsigned int yaffs_wr_attempts; + +/* + * Tracing flags. + * The flags masked in YAFFS_TRACE_ALWAYS are always traced. + */ + +#define YAFFS_TRACE_OS 0x00000002 +#define YAFFS_TRACE_ALLOCATE 0x00000004 +#define YAFFS_TRACE_SCAN 0x00000008 +#define YAFFS_TRACE_BAD_BLOCKS 0x00000010 +#define YAFFS_TRACE_ERASE 0x00000020 +#define YAFFS_TRACE_GC 0x00000040 +#define YAFFS_TRACE_WRITE 0x00000080 +#define YAFFS_TRACE_TRACING 0x00000100 +#define YAFFS_TRACE_DELETION 0x00000200 +#define YAFFS_TRACE_BUFFERS 0x00000400 +#define YAFFS_TRACE_NANDACCESS 0x00000800 +#define YAFFS_TRACE_GC_DETAIL 0x00001000 +#define YAFFS_TRACE_SCAN_DEBUG 0x00002000 +#define YAFFS_TRACE_MTD 0x00004000 +#define YAFFS_TRACE_CHECKPOINT 0x00008000 + +#define YAFFS_TRACE_VERIFY 0x00010000 +#define YAFFS_TRACE_VERIFY_NAND 0x00020000 +#define YAFFS_TRACE_VERIFY_FULL 0x00040000 +#define YAFFS_TRACE_VERIFY_ALL 0x000f0000 + +#define YAFFS_TRACE_SYNC 0x00100000 +#define YAFFS_TRACE_BACKGROUND 0x00200000 +#define YAFFS_TRACE_LOCK 0x00400000 +#define YAFFS_TRACE_MOUNT 0x00800000 + +#define YAFFS_TRACE_ERROR 0x40000000 +#define YAFFS_TRACE_BUG 0x80000000 +#define YAFFS_TRACE_ALWAYS 0xf0000000 + +#endif diff --git a/fs/yaffs2/yaffs_uboot_glue.c b/fs/yaffs2/yaffs_uboot_glue.c new file mode 100644 index 0000000..e113e40 --- /dev/null +++ b/fs/yaffs2/yaffs_uboot_glue.c @@ -0,0 +1,464 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2007 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* + * yaffscfg.c The configuration for the "direct" use of yaffs. + * + * This is set up for u-boot. + * + * This version now uses the ydevconfig mechanism to set up partitions. + */ + +#include <common.h> + +#include <config.h> +#include "nand.h" +#include "yaffscfg.h" +#include "yaffsfs.h" +#include "yaffs_packedtags2.h" +#include "yaffs_mtdif.h" +#include "yaffs_mtdif2.h" +#if 0 +#include <errno.h> +#else +#include "malloc.h" +#endif + +unsigned yaffs_trace_mask = 0x0; /* Disable logging */ +static int yaffs_errno; + + +void yaffs_bug_fn(const char *fn, int n) +{ + printf("yaffs bug at %s:%d\n", fn, n); +} + +void *yaffsfs_malloc(size_t x) +{ + return malloc(x); +} + +void yaffsfs_free(void *x) +{ + free(x); +} + +void yaffsfs_SetError(int err) +{ + yaffs_errno = err; +} + +int yaffsfs_GetLastError(void) +{ + return yaffs_errno; +} + + +int yaffsfs_GetError(void) +{ + return yaffs_errno; +} + +void yaffsfs_Lock(void) +{ +} + +void yaffsfs_Unlock(void) +{ +} + +__u32 yaffsfs_CurrentTime(void) +{ + return 0; +} + +void *yaffs_malloc(size_t size) +{ + return malloc(size); +} + +void yaffs_free(void *ptr) +{ + free(ptr); +} + +void yaffsfs_LocalInitialisation(void) +{ + /* No locking used */ +} + + +static const char *yaffs_file_type_str(struct yaffs_stat *stat) +{ + switch (stat->st_mode & S_IFMT) { + case S_IFREG: return "regular file"; + case S_IFDIR: return "directory"; + case S_IFLNK: return "symlink"; + default: return "unknown"; + } +} + +static const char *yaffs_error_str(void) +{ + int error = yaffsfs_GetLastError(); + + if (error < 0) + error = -error; + + switch (error) { + case EBUSY: return "Busy"; + case ENODEV: return "No such device"; + case EINVAL: return "Invalid parameter"; + case ENFILE: return "Too many open files"; + case EBADF: return "Bad handle"; + case EACCES: return "Wrong permissions"; + case EXDEV: return "Not on same device"; + case ENOENT: return "No such entry"; + case ENOSPC: return "Device full"; + case EROFS: return "Read only file system"; + case ERANGE: return "Range error"; + case ENOTEMPTY: return "Not empty"; + case ENAMETOOLONG: return "Name too long"; + case ENOMEM: return "Out of memory"; + case EFAULT: return "Fault"; + case EEXIST: return "Name exists"; + case ENOTDIR: return "Not a directory"; + case EISDIR: return "Not permitted on a directory"; + case ELOOP: return "Symlink loop"; + case 0: return "No error"; + default: return "Unknown error"; + } +} + +extern nand_info_t nand_info[]; + +void cmd_yaffs_tracemask(unsigned set, unsigned mask) +{ + if (set) + yaffs_trace_mask = mask; + + printf("yaffs trace mask: %08x\n", yaffs_trace_mask); +} + +static int yaffs_regions_overlap(int a, int b, int x, int y) +{ + return (a <= x && x <= b) || + (a <= y && y <= b) || + (x <= a && a <= y) || + (x <= b && b <= y); +} + +void cmd_yaffs_devconfig(char *_mp, int flash_dev, + int start_block, int end_block) +{ + struct mtd_info *mtd = NULL; + struct yaffs_dev *dev = NULL; + struct yaffs_dev *chk; + char *mp = NULL; + struct nand_chip *chip; + + dev = calloc(1, sizeof(*dev)); + mp = strdup(_mp); + + mtd = &nand_info[flash_dev]; + + if (!dev || !mp) { + /* Alloc error */ + printf("Failed to allocate memory\n"); + goto err; + } + + if (flash_dev >= CONFIG_SYS_MAX_NAND_DEVICE) { + printf("Flash device invalid\n"); + goto err; + } + + if (end_block == 0) + end_block = mtd->size / mtd->erasesize - 1; + + if (end_block < start_block) { + printf("Bad start/end\n"); + goto err; + } + + chip = mtd->priv; + + /* Check for any conflicts */ + yaffs_dev_rewind(); + while (1) { + chk = yaffs_next_dev(); + if (!chk) + break; + if (strcmp(chk->param.name, mp) == 0) { + printf("Mount point name already used\n"); + goto err; + } + if (chk->driver_context == mtd && + yaffs_regions_overlap( + chk->param.start_block, chk->param.end_block, + start_block, end_block)) { + printf("Region overlaps with partition %s\n", + chk->param.name); + goto err; + } + + } + + /* Seems sane, so configure */ + memset(dev, 0, sizeof(*dev)); + dev->param.name = mp; + dev->driver_context = mtd; + dev->param.start_block = start_block; + dev->param.end_block = end_block; + dev->param.chunks_per_block = mtd->erasesize / mtd->writesize; + dev->param.total_bytes_per_chunk = mtd->writesize; + dev->param.is_yaffs2 = 1; + dev->param.use_nand_ecc = 1; + dev->param.n_reserved_blocks = 5; + if (chip->ecc.layout->oobavail < sizeof(struct yaffs_packed_tags2)) + dev->param.inband_tags = 1; + dev->param.n_caches = 10; + dev->param.write_chunk_tags_fn = nandmtd2_write_chunk_tags; + dev->param.read_chunk_tags_fn = nandmtd2_read_chunk_tags; + dev->param.erase_fn = nandmtd_EraseBlockInNAND; + dev->param.initialise_flash_fn = nandmtd_InitialiseNAND; + dev->param.bad_block_fn = nandmtd2_MarkNANDBlockBad; + dev->param.query_block_fn = nandmtd2_QueryNANDBlock; + + yaffs_add_device(dev); + + printf("Configures yaffs mount %s: dev %d start block %d, end block %d %s\n", + mp, flash_dev, start_block, end_block, + dev->param.inband_tags ? "using inband tags" : ""); + return; + +err: + free(dev); + free(mp); +} + +void cmd_yaffs_dev_ls(void) +{ + struct yaffs_dev *dev; + int flash_dev; + int free_space; + + yaffs_dev_rewind(); + + while (1) { + dev = yaffs_next_dev(); + if (!dev) + return; + flash_dev = + ((unsigned) dev->driver_context - (unsigned) nand_info)/ + sizeof(nand_info[0]); + printf("%-10s %5d 0x%05x 0x%05x %s", + dev->param.name, flash_dev, + dev->param.start_block, dev->param.end_block, + dev->param.inband_tags ? "using inband tags, " : ""); + + free_space = yaffs_freespace(dev->param.name); + if (free_space < 0) + printf("not mounted\n"); + else + printf("free 0x%x\n", free_space); + + } +} + +void make_a_file(char *yaffsName, char bval, int sizeOfFile) +{ + int outh; + int i; + unsigned char buffer[100]; + + outh = yaffs_open(yaffsName, + O_CREAT | O_RDWR | O_TRUNC, + S_IREAD | S_IWRITE); + if (outh < 0) { + printf("Error opening file: %d. %s\n", outh, yaffs_error_str()); + return; + } + + memset(buffer, bval, 100); + + do { + i = sizeOfFile; + if (i > 100) + i = 100; + sizeOfFile -= i; + + yaffs_write(outh, buffer, i); + + } while (sizeOfFile > 0); + + + yaffs_close(outh); +} + +void read_a_file(char *fn) +{ + int h; + int i = 0; + unsigned char b; + + h = yaffs_open(fn, O_RDWR, 0); + if (h < 0) { + printf("File not found\n"); + return; + } + + while (yaffs_read(h, &b, 1) > 0) { + printf("%02x ", b); + i++; + if (i > 32) { + printf("\n"); + i = 0;; + } + } + printf("\n"); + yaffs_close(h); +} + +void cmd_yaffs_mount(char *mp) +{ + int retval = yaffs_mount(mp); + if (retval < 0) + printf("Error mounting %s, return value: %d, %s\n", mp, + yaffsfs_GetError(), yaffs_error_str()); +} + + +void cmd_yaffs_umount(char *mp) +{ + if (yaffs_unmount(mp) == -1) + printf("Error umounting %s, return value: %d, %s\n", mp, + yaffsfs_GetError(), yaffs_error_str()); +} + +void cmd_yaffs_write_file(char *yaffsName, char bval, int sizeOfFile) +{ + make_a_file(yaffsName, bval, sizeOfFile); +} + + +void cmd_yaffs_read_file(char *fn) +{ + read_a_file(fn); +} + + +void cmd_yaffs_mread_file(char *fn, char *addr) +{ + int h; + struct yaffs_stat s; + + yaffs_stat(fn, &s); + + printf("Copy %s to 0x%p... ", fn, addr); + h = yaffs_open(fn, O_RDWR, 0); + if (h < 0) { + printf("File not found\n"); + return; + } + + yaffs_read(h, addr, (int)s.st_size); + printf("\t[DONE]\n"); + + yaffs_close(h); +} + + +void cmd_yaffs_mwrite_file(char *fn, char *addr, int size) +{ + int outh; + + outh = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE); + if (outh < 0) + printf("Error opening file: %d, %s\n", outh, yaffs_error_str()); + + yaffs_write(outh, addr, size); + + yaffs_close(outh); +} + + +void cmd_yaffs_ls(const char *mountpt, int longlist) +{ + int i; + yaffs_DIR *d; + struct yaffs_dirent *de; + struct yaffs_stat stat; + char tempstr[255]; + + d = yaffs_opendir(mountpt); + + if (!d) { + printf("opendir failed, %s\n", yaffs_error_str()); + return; + } + + for (i = 0; (de = yaffs_readdir(d)) != NULL; i++) { + if (longlist) { + sprintf(tempstr, "%s/%s", mountpt, de->d_name); + yaffs_lstat(tempstr, &stat); + printf("%-25s\t%7ld", + de->d_name, + (long)stat.st_size); + printf(" %5d %s\n", + stat.st_ino, + yaffs_file_type_str(&stat)); + } else { + printf("%s\n", de->d_name); + } + } + + yaffs_closedir(d); +} + + +void cmd_yaffs_mkdir(const char *dir) +{ + int retval = yaffs_mkdir(dir, 0); + + if (retval < 0) + printf("yaffs_mkdir returning error: %d, %s\n", + retval, yaffs_error_str()); +} + +void cmd_yaffs_rmdir(const char *dir) +{ + int retval = yaffs_rmdir(dir); + + if (retval < 0) + printf("yaffs_rmdir returning error: %d, %s\n", + retval, yaffs_error_str()); +} + +void cmd_yaffs_rm(const char *path) +{ + int retval = yaffs_unlink(path); + + if (retval < 0) + printf("yaffs_unlink returning error: %d, %s\n", + retval, yaffs_error_str()); +} + +void cmd_yaffs_mv(const char *oldPath, const char *newPath) +{ + int retval = yaffs_rename(newPath, oldPath); + + if (retval < 0) + printf("yaffs_unlink returning error: %d, %s\n", + retval, yaffs_error_str()); +} diff --git a/fs/yaffs2/yaffs_verify.c b/fs/yaffs2/yaffs_verify.c new file mode 100644 index 0000000..db48e56 --- /dev/null +++ b/fs/yaffs2/yaffs_verify.c @@ -0,0 +1,529 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_verify.h" +#include "yaffs_trace.h" +#include "yaffs_bitmap.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_nand.h" + +int yaffs_skip_verification(struct yaffs_dev *dev) +{ + dev = dev; + return !(yaffs_trace_mask & + (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); +} + +static int yaffs_skip_full_verification(struct yaffs_dev *dev) +{ + dev = dev; + return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL)); +} + +static int yaffs_skip_nand_verification(struct yaffs_dev *dev) +{ + dev = dev; + return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND)); +} + +static const char * const block_state_name[] = { + "Unknown", + "Needs scan", + "Scanning", + "Empty", + "Allocating", + "Full", + "Dirty", + "Checkpoint", + "Collecting", + "Dead" +}; + +void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n) +{ + int actually_used; + int in_use; + + if (yaffs_skip_verification(dev)) + return; + + /* Report illegal runtime states */ + if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Block %d has undefined state %d", + n, bi->block_state); + + switch (bi->block_state) { + case YAFFS_BLOCK_STATE_UNKNOWN: + case YAFFS_BLOCK_STATE_SCANNING: + case YAFFS_BLOCK_STATE_NEEDS_SCAN: + yaffs_trace(YAFFS_TRACE_VERIFY, + "Block %d has bad run-state %s", + n, block_state_name[bi->block_state]); + } + + /* Check pages in use and soft deletions are legal */ + + actually_used = bi->pages_in_use - bi->soft_del_pages; + + if (bi->pages_in_use < 0 || + bi->pages_in_use > dev->param.chunks_per_block || + bi->soft_del_pages < 0 || + bi->soft_del_pages > dev->param.chunks_per_block || + actually_used < 0 || actually_used > dev->param.chunks_per_block) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Block %d has illegal values pages_in_used %d soft_del_pages %d", + n, bi->pages_in_use, bi->soft_del_pages); + + /* Check chunk bitmap legal */ + in_use = yaffs_count_chunk_bits(dev, n); + if (in_use != bi->pages_in_use) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Block %d has inconsistent values pages_in_use %d counted chunk bits %d", + n, bi->pages_in_use, in_use); +} + +void yaffs_verify_collected_blk(struct yaffs_dev *dev, + struct yaffs_block_info *bi, int n) +{ + yaffs_verify_blk(dev, bi, n); + + /* After collection the block should be in the erased state */ + + if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING && + bi->block_state != YAFFS_BLOCK_STATE_EMPTY) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Block %d is in state %d after gc, should be erased", + n, bi->block_state); + } +} + +void yaffs_verify_blocks(struct yaffs_dev *dev) +{ + int i; + int state_count[YAFFS_NUMBER_OF_BLOCK_STATES]; + int illegal_states = 0; + + if (yaffs_skip_verification(dev)) + return; + + memset(state_count, 0, sizeof(state_count)); + + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + struct yaffs_block_info *bi = yaffs_get_block_info(dev, i); + yaffs_verify_blk(dev, bi, i); + + if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES) + state_count[bi->block_state]++; + else + illegal_states++; + } + + yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary"); + + yaffs_trace(YAFFS_TRACE_VERIFY, + "%d blocks have illegal states", + illegal_states); + if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Too many allocating blocks"); + + for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) + yaffs_trace(YAFFS_TRACE_VERIFY, + "%s %d blocks", + block_state_name[i], state_count[i]); + + if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT]) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Checkpoint block count wrong dev %d count %d", + dev->blocks_in_checkpt, + state_count[YAFFS_BLOCK_STATE_CHECKPOINT]); + + if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY]) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Erased block count wrong dev %d count %d", + dev->n_erased_blocks, + state_count[YAFFS_BLOCK_STATE_EMPTY]); + + if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Too many collecting blocks %d (max is 1)", + state_count[YAFFS_BLOCK_STATE_COLLECTING]); +} + +/* + * Verify the object header. oh must be valid, but obj and tags may be NULL in + * which case those tests will not be performed. + */ +void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh, + struct yaffs_ext_tags *tags, int parent_check) +{ + if (obj && yaffs_skip_verification(obj->my_dev)) + return; + + if (!(tags && obj && oh)) { + yaffs_trace(YAFFS_TRACE_VERIFY, + "Verifying object header tags %p obj %p oh %p", + tags, obj, oh); + return; + } + + if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || + oh->type > YAFFS_OBJECT_TYPE_MAX) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header type is illegal value 0x%x", + tags->obj_id, oh->type); + + if (tags->obj_id != obj->obj_id) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header mismatch obj_id %d", + tags->obj_id, obj->obj_id); + + /* + * Check that the object's parent ids match if parent_check requested. + * + * Tests do not apply to the root object. + */ + + if (parent_check && tags->obj_id > 1 && !obj->parent) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header mismatch parent_id %d obj->parent is NULL", + tags->obj_id, oh->parent_obj_id); + + if (parent_check && obj->parent && + oh->parent_obj_id != obj->parent->obj_id && + (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED || + obj->parent->obj_id != YAFFS_OBJECTID_DELETED)) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header mismatch parent_id %d parent_obj_id %d", + tags->obj_id, oh->parent_obj_id, + obj->parent->obj_id); + + if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */ + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header name is NULL", + obj->obj_id); + + if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Junk name */ + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header name is 0xff", + obj->obj_id); +} + +void yaffs_verify_file(struct yaffs_obj *obj) +{ + u32 x; + int required_depth; + int actual_depth; + int last_chunk; + u32 offset_in_chunk; + u32 the_chunk; + + u32 i; + struct yaffs_dev *dev; + struct yaffs_ext_tags tags; + struct yaffs_tnode *tn; + u32 obj_id; + + if (!obj) + return; + + if (yaffs_skip_verification(obj->my_dev)) + return; + + dev = obj->my_dev; + obj_id = obj->obj_id; + + + /* Check file size is consistent with tnode depth */ + yaffs_addr_to_chunk(dev, obj->variant.file_variant.file_size, + &last_chunk, &offset_in_chunk); + last_chunk++; + x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS; + required_depth = 0; + while (x > 0) { + x >>= YAFFS_TNODES_INTERNAL_BITS; + required_depth++; + } + + actual_depth = obj->variant.file_variant.top_level; + + /* Check that the chunks in the tnode tree are all correct. + * We do this by scanning through the tnode tree and + * checking the tags for every chunk match. + */ + + if (yaffs_skip_nand_verification(dev)) + return; + + for (i = 1; i <= last_chunk; i++) { + tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i); + + if (!tn) + continue; + + the_chunk = yaffs_get_group_base(dev, tn, i); + if (the_chunk > 0) { + yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, + &tags); + if (tags.obj_id != obj_id || tags.chunk_id != i) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)", + obj_id, i, the_chunk, + tags.obj_id, tags.chunk_id); + } + } +} + +void yaffs_verify_link(struct yaffs_obj *obj) +{ + if (obj && yaffs_skip_verification(obj->my_dev)) + return; + + /* Verify sane equivalent object */ +} + +void yaffs_verify_symlink(struct yaffs_obj *obj) +{ + if (obj && yaffs_skip_verification(obj->my_dev)) + return; + + /* Verify symlink string */ +} + +void yaffs_verify_special(struct yaffs_obj *obj) +{ + if (obj && yaffs_skip_verification(obj->my_dev)) + return; +} + +void yaffs_verify_obj(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev; + u32 chunk_min; + u32 chunk_max; + u32 chunk_id_ok; + u32 chunk_in_range; + u32 chunk_wrongly_deleted; + u32 chunk_valid; + + if (!obj) + return; + + if (obj->being_created) + return; + + dev = obj->my_dev; + + if (yaffs_skip_verification(dev)) + return; + + /* Check sane object header chunk */ + + chunk_min = dev->internal_start_block * dev->param.chunks_per_block; + chunk_max = + (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1; + + chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min && + ((unsigned)(obj->hdr_chunk)) <= chunk_max); + chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0); + chunk_valid = chunk_in_range && + yaffs_check_chunk_bit(dev, + obj->hdr_chunk / dev->param.chunks_per_block, + obj->hdr_chunk % dev->param.chunks_per_block); + chunk_wrongly_deleted = chunk_in_range && !chunk_valid; + + if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted)) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d has chunk_id %d %s %s", + obj->obj_id, obj->hdr_chunk, + chunk_id_ok ? "" : ",out of range", + chunk_wrongly_deleted ? ",marked as deleted" : ""); + + if (chunk_valid && !yaffs_skip_nand_verification(dev)) { + struct yaffs_ext_tags tags; + struct yaffs_obj_hdr *oh; + u8 *buffer = yaffs_get_temp_buffer(dev); + + oh = (struct yaffs_obj_hdr *)buffer; + + yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, &tags); + + yaffs_verify_oh(obj, oh, &tags, 1); + + yaffs_release_temp_buffer(dev, buffer); + } + + /* Verify it has a parent */ + if (obj && !obj->fake && (!obj->parent || obj->parent->my_dev != dev)) { + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d has parent pointer %p which does not look like an object", + obj->obj_id, obj->parent); + } + + /* Verify parent is a directory */ + if (obj->parent && + obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d's parent is not a directory (type %d)", + obj->obj_id, obj->parent->variant_type); + } + + switch (obj->variant_type) { + case YAFFS_OBJECT_TYPE_FILE: + yaffs_verify_file(obj); + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + yaffs_verify_symlink(obj); + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + yaffs_verify_dir(obj); + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + yaffs_verify_link(obj); + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + yaffs_verify_special(obj); + break; + case YAFFS_OBJECT_TYPE_UNKNOWN: + default: + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d has illegaltype %d", + obj->obj_id, obj->variant_type); + break; + } +} + +void yaffs_verify_objects(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj; + int i; + struct list_head *lh; + + if (yaffs_skip_verification(dev)) + return; + + /* Iterate through the objects in each hash entry */ + + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + list_for_each(lh, &dev->obj_bucket[i].list) { + obj = list_entry(lh, struct yaffs_obj, hash_link); + yaffs_verify_obj(obj); + } + } +} + +void yaffs_verify_obj_in_dir(struct yaffs_obj *obj) +{ + struct list_head *lh; + struct yaffs_obj *list_obj; + int count = 0; + + if (!obj) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify"); + BUG(); + return; + } + + if (yaffs_skip_verification(obj->my_dev)) + return; + + if (!obj->parent) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent"); + BUG(); + return; + } + + if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory"); + BUG(); + } + + /* Iterate through the objects in each hash entry */ + + list_for_each(lh, &obj->parent->variant.dir_variant.children) { + list_obj = list_entry(lh, struct yaffs_obj, siblings); + yaffs_verify_obj(list_obj); + if (obj == list_obj) + count++; + } + + if (count != 1) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Object in directory %d times", + count); + BUG(); + } +} + +void yaffs_verify_dir(struct yaffs_obj *directory) +{ + struct list_head *lh; + struct yaffs_obj *list_obj; + + if (!directory) { + BUG(); + return; + } + + if (yaffs_skip_full_verification(directory->my_dev)) + return; + + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Directory has wrong type: %d", + directory->variant_type); + BUG(); + } + + /* Iterate through the objects in each hash entry */ + + list_for_each(lh, &directory->variant.dir_variant.children) { + list_obj = list_entry(lh, struct yaffs_obj, siblings); + if (list_obj->parent != directory) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Object in directory list has wrong parent %p", + list_obj->parent); + BUG(); + } + yaffs_verify_obj_in_dir(list_obj); + } +} + +static int yaffs_free_verification_failures; + +void yaffs_verify_free_chunks(struct yaffs_dev *dev) +{ + int counted; + int difference; + + if (yaffs_skip_verification(dev)) + return; + + counted = yaffs_count_free_chunks(dev); + + difference = dev->n_free_chunks - counted; + + if (difference) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Freechunks verification failure %d %d %d", + dev->n_free_chunks, counted, difference); + yaffs_free_verification_failures++; + } +} + +int yaffs_verify_file_sane(struct yaffs_obj *in) +{ + in = in; + return YAFFS_OK; +} diff --git a/fs/yaffs2/yaffs_verify.h b/fs/yaffs2/yaffs_verify.h new file mode 100644 index 0000000..4f4af8d --- /dev/null +++ b/fs/yaffs2/yaffs_verify.h @@ -0,0 +1,43 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_VERIFY_H__ +#define __YAFFS_VERIFY_H__ + +#include "yaffs_guts.h" + +void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, + int n); +void yaffs_verify_collected_blk(struct yaffs_dev *dev, + struct yaffs_block_info *bi, int n); +void yaffs_verify_blocks(struct yaffs_dev *dev); + +void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh, + struct yaffs_ext_tags *tags, int parent_check); +void yaffs_verify_file(struct yaffs_obj *obj); +void yaffs_verify_link(struct yaffs_obj *obj); +void yaffs_verify_symlink(struct yaffs_obj *obj); +void yaffs_verify_special(struct yaffs_obj *obj); +void yaffs_verify_obj(struct yaffs_obj *obj); +void yaffs_verify_objects(struct yaffs_dev *dev); +void yaffs_verify_obj_in_dir(struct yaffs_obj *obj); +void yaffs_verify_dir(struct yaffs_obj *directory); +void yaffs_verify_free_chunks(struct yaffs_dev *dev); + +int yaffs_verify_file_sane(struct yaffs_obj *obj); + +int yaffs_skip_verification(struct yaffs_dev *dev); + +#endif diff --git a/fs/yaffs2/yaffs_yaffs1.c b/fs/yaffs2/yaffs_yaffs1.c new file mode 100644 index 0000000..d277e20 --- /dev/null +++ b/fs/yaffs2/yaffs_yaffs1.c @@ -0,0 +1,422 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_yaffs1.h" +#include "yportenv.h" +#include "yaffs_trace.h" +#include "yaffs_bitmap.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_nand.h" +#include "yaffs_attribs.h" + +int yaffs1_scan(struct yaffs_dev *dev) +{ + struct yaffs_ext_tags tags; + int blk; + int result; + int chunk; + int c; + int deleted; + enum yaffs_block_state state; + LIST_HEAD(hard_list); + struct yaffs_block_info *bi; + u32 seq_number; + struct yaffs_obj_hdr *oh; + struct yaffs_obj *in; + struct yaffs_obj *parent; + int alloc_failed = 0; + struct yaffs_shadow_fixer *shadow_fixers = NULL; + u8 *chunk_data; + + yaffs_trace(YAFFS_TRACE_SCAN, + "yaffs1_scan starts intstartblk %d intendblk %d...", + dev->internal_start_block, dev->internal_end_block); + + chunk_data = yaffs_get_temp_buffer(dev); + + dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; + + /* Scan all the blocks to determine their state */ + bi = dev->block_info; + for (blk = dev->internal_start_block; blk <= dev->internal_end_block; + blk++) { + yaffs_clear_chunk_bits(dev, blk); + bi->pages_in_use = 0; + bi->soft_del_pages = 0; + + yaffs_query_init_block_state(dev, blk, &state, &seq_number); + + bi->block_state = state; + bi->seq_number = seq_number; + + if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) + bi->block_state = state = YAFFS_BLOCK_STATE_DEAD; + + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, + "Block scanning block %d state %d seq %d", + blk, state, seq_number); + + if (state == YAFFS_BLOCK_STATE_DEAD) { + yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, + "block %d is bad", blk); + } else if (state == YAFFS_BLOCK_STATE_EMPTY) { + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty "); + dev->n_erased_blocks++; + dev->n_free_chunks += dev->param.chunks_per_block; + } + bi++; + } + + /* For each block.... */ + for (blk = dev->internal_start_block; + !alloc_failed && blk <= dev->internal_end_block; blk++) { + + cond_resched(); + + bi = yaffs_get_block_info(dev, blk); + state = bi->block_state; + + deleted = 0; + + /* For each chunk in each block that needs scanning.... */ + for (c = 0; + !alloc_failed && c < dev->param.chunks_per_block && + state == YAFFS_BLOCK_STATE_NEEDS_SCAN; c++) { + /* Read the tags and decide what to do */ + chunk = blk * dev->param.chunks_per_block + c; + + result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, + &tags); + + /* Let's have a good look at this chunk... */ + + if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED || + tags.is_deleted) { + /* YAFFS1 only... + * A deleted chunk + */ + deleted++; + dev->n_free_chunks++; + } else if (!tags.chunk_used) { + /* An unassigned chunk in the block + * This means that either the block is empty or + * this is the one being allocated from + */ + + if (c == 0) { + /* We're looking at the first chunk in + *the block so the block is unused */ + state = YAFFS_BLOCK_STATE_EMPTY; + dev->n_erased_blocks++; + } else { + /* this is the block being allocated */ + yaffs_trace(YAFFS_TRACE_SCAN, + " Allocating from %d %d", + blk, c); + state = YAFFS_BLOCK_STATE_ALLOCATING; + dev->alloc_block = blk; + dev->alloc_page = c; + dev->alloc_block_finder = blk; + + } + + dev->n_free_chunks += + (dev->param.chunks_per_block - c); + } else if (tags.chunk_id > 0) { + /* chunk_id > 0 so it is a data chunk... */ + unsigned int endpos; + + yaffs_set_chunk_bit(dev, blk, c); + bi->pages_in_use++; + + in = yaffs_find_or_create_by_number(dev, + tags.obj_id, + YAFFS_OBJECT_TYPE_FILE); + /* PutChunkIntoFile checks for a clash + * (two data chunks with the same chunk_id). + */ + + if (!in) + alloc_failed = 1; + + if (in) { + if (!yaffs_put_chunk_in_file + (in, tags.chunk_id, chunk, 1)) + alloc_failed = 1; + } + + endpos = + (tags.chunk_id - 1) * + dev->data_bytes_per_chunk + + tags.n_bytes; + if (in && + in->variant_type == + YAFFS_OBJECT_TYPE_FILE && + in->variant.file_variant.scanned_size < + endpos) { + in->variant.file_variant.scanned_size = + endpos; + if (!dev->param.use_header_file_size) { + in->variant. + file_variant.file_size = + in->variant. + file_variant.scanned_size; + } + + } + } else { + /* chunk_id == 0, so it is an ObjectHeader. + * Make the object + */ + yaffs_set_chunk_bit(dev, blk, c); + bi->pages_in_use++; + + result = yaffs_rd_chunk_tags_nand(dev, chunk, + chunk_data, + NULL); + + oh = (struct yaffs_obj_hdr *)chunk_data; + + in = yaffs_find_by_number(dev, tags.obj_id); + if (in && in->variant_type != oh->type) { + /* This should not happen, but somehow + * Wev'e ended up with an obj_id that + * has been reused but not yet deleted, + * and worse still it has changed type. + * Delete the old object. + */ + + yaffs_del_obj(in); + in = NULL; + } + + in = yaffs_find_or_create_by_number(dev, + tags.obj_id, + oh->type); + + if (!in) + alloc_failed = 1; + + if (in && oh->shadows_obj > 0) { + + struct yaffs_shadow_fixer *fixer; + fixer = + kmalloc(sizeof + (struct yaffs_shadow_fixer), + GFP_NOFS); + if (fixer) { + fixer->next = shadow_fixers; + shadow_fixers = fixer; + fixer->obj_id = tags.obj_id; + fixer->shadowed_id = + oh->shadows_obj; + yaffs_trace(YAFFS_TRACE_SCAN, + " Shadow fixer: %d shadows %d", + fixer->obj_id, + fixer->shadowed_id); + + } + + } + + if (in && in->valid) { + /* We have already filled this one. + * We have a duplicate and need to + * resolve it. */ + + unsigned existing_serial = in->serial; + unsigned new_serial = + tags.serial_number; + + if (((existing_serial + 1) & 3) == + new_serial) { + /* Use new one - destroy the + * exisiting one */ + yaffs_chunk_del(dev, + in->hdr_chunk, + 1, __LINE__); + in->valid = 0; + } else { + /* Use existing - destroy + * this one. */ + yaffs_chunk_del(dev, chunk, 1, + __LINE__); + } + } + + if (in && !in->valid && + (tags.obj_id == YAFFS_OBJECTID_ROOT || + tags.obj_id == + YAFFS_OBJECTID_LOSTNFOUND)) { + /* We only load some info, don't fiddle + * with directory structure */ + in->valid = 1; + in->variant_type = oh->type; + + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + in->hdr_chunk = chunk; + in->serial = tags.serial_number; + + } else if (in && !in->valid) { + /* we need to load this info */ + + in->valid = 1; + in->variant_type = oh->type; + + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + in->hdr_chunk = chunk; + in->serial = tags.serial_number; + + yaffs_set_obj_name_from_oh(in, oh); + in->dirty = 0; + + /* directory stuff... + * hook up to parent + */ + + parent = + yaffs_find_or_create_by_number + (dev, oh->parent_obj_id, + YAFFS_OBJECT_TYPE_DIRECTORY); + if (!parent) + alloc_failed = 1; + if (parent && parent->variant_type == + YAFFS_OBJECT_TYPE_UNKNOWN) { + /* Set up as a directory */ + parent->variant_type = + YAFFS_OBJECT_TYPE_DIRECTORY; + INIT_LIST_HEAD(&parent-> + variant.dir_variant. + children); + } else if (!parent || + parent->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + /* Hoosterman, a problem.... + * We're trying to use a + * non-directory as a directory + */ + + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." + ); + parent = dev->lost_n_found; + } + + yaffs_add_obj_to_dir(parent, in); + + switch (in->variant_type) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Todo got a problem */ + break; + case YAFFS_OBJECT_TYPE_FILE: + if (dev->param. + use_header_file_size) + in->variant. + file_variant.file_size + = yaffs_oh_to_size(oh); + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + in->variant. + hardlink_variant.equiv_id = + oh->equiv_id; + list_add(&in->hard_links, + &hard_list); + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + in->variant.symlink_variant. + alias = + yaffs_clone_str(oh->alias); + if (!in->variant. + symlink_variant.alias) + alloc_failed = 1; + break; + } + } + } + } + + if (state == YAFFS_BLOCK_STATE_NEEDS_SCAN) { + /* If we got this far while scanning, + * then the block is fully allocated. */ + state = YAFFS_BLOCK_STATE_FULL; + } + + if (state == YAFFS_BLOCK_STATE_ALLOCATING) { + /* If the block was partially allocated then + * treat it as fully allocated. */ + state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } + + bi->block_state = state; + + /* Now let's see if it was dirty */ + if (bi->pages_in_use == 0 && + !bi->has_shrink_hdr && + bi->block_state == YAFFS_BLOCK_STATE_FULL) + yaffs_block_became_dirty(dev, blk); + } + + /* Ok, we've done all the scanning. + * Fix up the hard link chains. + * We should now have scanned all the objects, now it's time to add + * these hardlinks. + */ + + yaffs_link_fixup(dev, &hard_list); + + /* + * Fix up any shadowed objects. + * There should not be more than one of these. + */ + { + struct yaffs_shadow_fixer *fixer; + struct yaffs_obj *obj; + + while (shadow_fixers) { + fixer = shadow_fixers; + shadow_fixers = fixer->next; + /* Complete the rename transaction by deleting the + * shadowed object then setting the object header + to unshadowed. + */ + obj = yaffs_find_by_number(dev, fixer->shadowed_id); + if (obj) + yaffs_del_obj(obj); + + obj = yaffs_find_by_number(dev, fixer->obj_id); + + if (obj) + yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); + + kfree(fixer); + } + } + + yaffs_release_temp_buffer(dev, chunk_data); + + if (alloc_failed) + return YAFFS_FAIL; + + yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends"); + + return YAFFS_OK; +} diff --git a/fs/yaffs2/yaffsinterface.h b/fs/yaffs2/yaffs_yaffs1.h index 810837a..97e2fdd 100644 --- a/fs/yaffs2/yaffsinterface.h +++ b/fs/yaffs2/yaffs_yaffs1.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -13,9 +13,10 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ -#ifndef __YAFFSINTERFACE_H__ -#define __YAFFSINTERFACE_H__ +#ifndef __YAFFS_YAFFS1_H__ +#define __YAFFS_YAFFS1_H__ -int yaffs_Initialise(unsigned nBlocks); +#include "yaffs_guts.h" +int yaffs1_scan(struct yaffs_dev *dev); #endif diff --git a/fs/yaffs2/yaffs_yaffs2.c b/fs/yaffs2/yaffs_yaffs2.c new file mode 100644 index 0000000..f1dc972 --- /dev/null +++ b/fs/yaffs2/yaffs_yaffs2.c @@ -0,0 +1,1532 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_guts.h" +#include "yaffs_trace.h" +#include "yaffs_yaffs2.h" +#include "yaffs_checkptrw.h" +#include "yaffs_bitmap.h" +#include "yaffs_nand.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_verify.h" +#include "yaffs_attribs.h" +#include "yaffs_summary.h" + +/* + * Checkpoints are really no benefit on very small partitions. + * + * To save space on small partitions don't bother with checkpoints unless + * the partition is at least this big. + */ +#define YAFFS_CHECKPOINT_MIN_BLOCKS 60 +#define YAFFS_SMALL_HOLE_THRESHOLD 4 + +/* + * Oldest Dirty Sequence Number handling. + */ + +/* yaffs_calc_oldest_dirty_seq() + * yaffs2_find_oldest_dirty_seq() + * Calculate the oldest dirty sequence number if we don't know it. + */ +void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev) +{ + int i; + unsigned seq; + unsigned block_no = 0; + struct yaffs_block_info *b; + + if (!dev->param.is_yaffs2) + return; + + /* Find the oldest dirty sequence number. */ + seq = dev->seq_number + 1; + b = dev->block_info; + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + if (b->block_state == YAFFS_BLOCK_STATE_FULL && + (b->pages_in_use - b->soft_del_pages) < + dev->param.chunks_per_block && + b->seq_number < seq) { + seq = b->seq_number; + block_no = i; + } + b++; + } + + if (block_no) { + dev->oldest_dirty_seq = seq; + dev->oldest_dirty_block = block_no; + } +} + +void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev) +{ + if (!dev->param.is_yaffs2) + return; + + if (!dev->oldest_dirty_seq) + yaffs_calc_oldest_dirty_seq(dev); +} + +/* + * yaffs_clear_oldest_dirty_seq() + * Called when a block is erased or marked bad. (ie. when its seq_number + * becomes invalid). If the value matches the oldest then we clear + * dev->oldest_dirty_seq to force its recomputation. + */ +void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev, + struct yaffs_block_info *bi) +{ + + if (!dev->param.is_yaffs2) + return; + + if (!bi || bi->seq_number == dev->oldest_dirty_seq) { + dev->oldest_dirty_seq = 0; + dev->oldest_dirty_block = 0; + } +} + +/* + * yaffs2_update_oldest_dirty_seq() + * Update the oldest dirty sequence number whenever we dirty a block. + * Only do this if the oldest_dirty_seq is actually being tracked. + */ +void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no, + struct yaffs_block_info *bi) +{ + if (!dev->param.is_yaffs2) + return; + + if (dev->oldest_dirty_seq) { + if (dev->oldest_dirty_seq > bi->seq_number) { + dev->oldest_dirty_seq = bi->seq_number; + dev->oldest_dirty_block = block_no; + } + } +} + +int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi) +{ + + if (!dev->param.is_yaffs2) + return 1; /* disqualification only applies to yaffs2. */ + + if (!bi->has_shrink_hdr) + return 1; /* can gc */ + + yaffs2_find_oldest_dirty_seq(dev); + + /* Can't do gc of this block if there are any blocks older than this + * one that have discarded pages. + */ + return (bi->seq_number <= dev->oldest_dirty_seq); +} + +/* + * yaffs2_find_refresh_block() + * periodically finds the oldest full block by sequence number for refreshing. + * Only for yaffs2. + */ +u32 yaffs2_find_refresh_block(struct yaffs_dev *dev) +{ + u32 b; + u32 oldest = 0; + u32 oldest_seq = 0; + struct yaffs_block_info *bi; + + if (!dev->param.is_yaffs2) + return oldest; + + /* + * If refresh period < 10 then refreshing is disabled. + */ + if (dev->param.refresh_period < 10) + return oldest; + + /* + * Fix broken values. + */ + if (dev->refresh_skip > dev->param.refresh_period) + dev->refresh_skip = dev->param.refresh_period; + + if (dev->refresh_skip > 0) + return oldest; + + /* + * Refresh skip is now zero. + * We'll do a refresh this time around.... + * Update the refresh skip and find the oldest block. + */ + dev->refresh_skip = dev->param.refresh_period; + dev->refresh_count++; + bi = dev->block_info; + for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { + + if (bi->block_state == YAFFS_BLOCK_STATE_FULL) { + + if (oldest < 1 || bi->seq_number < oldest_seq) { + oldest = b; + oldest_seq = bi->seq_number; + } + } + bi++; + } + + if (oldest > 0) { + yaffs_trace(YAFFS_TRACE_GC, + "GC refresh count %d selected block %d with seq_number %d", + dev->refresh_count, oldest, oldest_seq); + } + + return oldest; +} + +int yaffs2_checkpt_required(struct yaffs_dev *dev) +{ + int nblocks; + + if (!dev->param.is_yaffs2) + return 0; + + nblocks = dev->internal_end_block - dev->internal_start_block + 1; + + return !dev->param.skip_checkpt_wr && + !dev->read_only && (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS); +} + +int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev) +{ + int retval; + int n_bytes = 0; + int n_blocks; + int dev_blocks; + + if (!dev->param.is_yaffs2) + return 0; + + if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) { + /* Not a valid value so recalculate */ + dev_blocks = dev->param.end_block - dev->param.start_block + 1; + n_bytes += sizeof(struct yaffs_checkpt_validity); + n_bytes += sizeof(struct yaffs_checkpt_dev); + n_bytes += dev_blocks * sizeof(struct yaffs_block_info); + n_bytes += dev_blocks * dev->chunk_bit_stride; + n_bytes += + (sizeof(struct yaffs_checkpt_obj) + sizeof(u32)) * + dev->n_obj; + n_bytes += (dev->tnode_size + sizeof(u32)) * dev->n_tnodes; + n_bytes += sizeof(struct yaffs_checkpt_validity); + n_bytes += sizeof(u32); /* checksum */ + + /* Round up and add 2 blocks to allow for some bad blocks, + * so add 3 */ + + n_blocks = + (n_bytes / + (dev->data_bytes_per_chunk * + dev->param.chunks_per_block)) + 3; + + dev->checkpoint_blocks_required = n_blocks; + } + + retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt; + if (retval < 0) + retval = 0; + return retval; +} + +/*--------------------- Checkpointing --------------------*/ + +static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head) +{ + struct yaffs_checkpt_validity cp; + + memset(&cp, 0, sizeof(cp)); + + cp.struct_type = sizeof(cp); + cp.magic = YAFFS_MAGIC; + cp.version = YAFFS_CHECKPOINT_VERSION; + cp.head = (head) ? 1 : 0; + + return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0; +} + +static int yaffs2_rd_checkpt_validity_marker(struct yaffs_dev *dev, int head) +{ + struct yaffs_checkpt_validity cp; + int ok; + + ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); + + if (ok) + ok = (cp.struct_type == sizeof(cp)) && + (cp.magic == YAFFS_MAGIC) && + (cp.version == YAFFS_CHECKPOINT_VERSION) && + (cp.head == ((head) ? 1 : 0)); + return ok ? 1 : 0; +} + +static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp, + struct yaffs_dev *dev) +{ + cp->n_erased_blocks = dev->n_erased_blocks; + cp->alloc_block = dev->alloc_block; + cp->alloc_page = dev->alloc_page; + cp->n_free_chunks = dev->n_free_chunks; + + cp->n_deleted_files = dev->n_deleted_files; + cp->n_unlinked_files = dev->n_unlinked_files; + cp->n_bg_deletions = dev->n_bg_deletions; + cp->seq_number = dev->seq_number; + +} + +static void yaffs_checkpt_dev_to_dev(struct yaffs_dev *dev, + struct yaffs_checkpt_dev *cp) +{ + dev->n_erased_blocks = cp->n_erased_blocks; + dev->alloc_block = cp->alloc_block; + dev->alloc_page = cp->alloc_page; + dev->n_free_chunks = cp->n_free_chunks; + + dev->n_deleted_files = cp->n_deleted_files; + dev->n_unlinked_files = cp->n_unlinked_files; + dev->n_bg_deletions = cp->n_bg_deletions; + dev->seq_number = cp->seq_number; +} + +static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev) +{ + struct yaffs_checkpt_dev cp; + u32 n_bytes; + u32 n_blocks = dev->internal_end_block - dev->internal_start_block + 1; + int ok; + + /* Write device runtime values */ + yaffs2_dev_to_checkpt_dev(&cp, dev); + cp.struct_type = sizeof(cp); + + ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); + if (!ok) + return 0; + + /* Write block info */ + n_bytes = n_blocks * sizeof(struct yaffs_block_info); + ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes); + if (!ok) + return 0; + + /* Write chunk bits */ + n_bytes = n_blocks * dev->chunk_bit_stride; + ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes); + + return ok ? 1 : 0; +} + +static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev) +{ + struct yaffs_checkpt_dev cp; + u32 n_bytes; + u32 n_blocks = + (dev->internal_end_block - dev->internal_start_block + 1); + int ok; + + ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); + if (!ok) + return 0; + + if (cp.struct_type != sizeof(cp)) + return 0; + + yaffs_checkpt_dev_to_dev(dev, &cp); + + n_bytes = n_blocks * sizeof(struct yaffs_block_info); + + ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes); + + if (!ok) + return 0; + + n_bytes = n_blocks * dev->chunk_bit_stride; + + ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes); + + return ok ? 1 : 0; +} + +static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp, + struct yaffs_obj *obj) +{ + cp->obj_id = obj->obj_id; + cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0; + cp->hdr_chunk = obj->hdr_chunk; + cp->variant_type = obj->variant_type; + cp->deleted = obj->deleted; + cp->soft_del = obj->soft_del; + cp->unlinked = obj->unlinked; + cp->fake = obj->fake; + cp->rename_allowed = obj->rename_allowed; + cp->unlink_allowed = obj->unlink_allowed; + cp->serial = obj->serial; + cp->n_data_chunks = obj->n_data_chunks; + + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) + cp->size_or_equiv_obj = obj->variant.file_variant.file_size; + else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) + cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id; +} + +static int yaffs2_checkpt_obj_to_obj(struct yaffs_obj *obj, + struct yaffs_checkpt_obj *cp) +{ + struct yaffs_obj *parent; + + if (obj->variant_type != cp->variant_type) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Checkpoint read object %d type %d chunk %d does not match existing object type %d", + cp->obj_id, cp->variant_type, cp->hdr_chunk, + obj->variant_type); + return 0; + } + + obj->obj_id = cp->obj_id; + + if (cp->parent_id) + parent = yaffs_find_or_create_by_number(obj->my_dev, + cp->parent_id, + YAFFS_OBJECT_TYPE_DIRECTORY); + else + parent = NULL; + + if (parent) { + if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory", + cp->obj_id, cp->parent_id, + cp->variant_type, cp->hdr_chunk, + parent->variant_type); + return 0; + } + yaffs_add_obj_to_dir(parent, obj); + } + + obj->hdr_chunk = cp->hdr_chunk; + obj->variant_type = cp->variant_type; + obj->deleted = cp->deleted; + obj->soft_del = cp->soft_del; + obj->unlinked = cp->unlinked; + obj->fake = cp->fake; + obj->rename_allowed = cp->rename_allowed; + obj->unlink_allowed = cp->unlink_allowed; + obj->serial = cp->serial; + obj->n_data_chunks = cp->n_data_chunks; + + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) + obj->variant.file_variant.file_size = cp->size_or_equiv_obj; + else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) + obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj; + + if (obj->hdr_chunk > 0) + obj->lazy_loaded = 1; + return 1; +} + +static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in, + struct yaffs_tnode *tn, u32 level, + int chunk_offset) +{ + int i; + struct yaffs_dev *dev = in->my_dev; + int ok = 1; + u32 base_offset; + + if (!tn) + return 1; + + if (level > 0) { + for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { + if (!tn->internal[i]) + continue; + ok = yaffs2_checkpt_tnode_worker(in, + tn->internal[i], + level - 1, + (chunk_offset << + YAFFS_TNODES_INTERNAL_BITS) + i); + } + return ok; + } + + /* Level 0 tnode */ + base_offset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS; + ok = (yaffs2_checkpt_wr(dev, &base_offset, sizeof(base_offset)) == + sizeof(base_offset)); + if (ok) + ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) == + dev->tnode_size); + + return ok; +} + +static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj) +{ + u32 end_marker = ~0; + int ok = 1; + + if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) + return ok; + + ok = yaffs2_checkpt_tnode_worker(obj, + obj->variant.file_variant.top, + obj->variant.file_variant. + top_level, 0); + if (ok) + ok = (yaffs2_checkpt_wr(obj->my_dev, &end_marker, + sizeof(end_marker)) == sizeof(end_marker)); + + return ok ? 1 : 0; +} + +static int yaffs2_rd_checkpt_tnodes(struct yaffs_obj *obj) +{ + u32 base_chunk; + int ok = 1; + struct yaffs_dev *dev = obj->my_dev; + struct yaffs_file_var *file_stuct_ptr = &obj->variant.file_variant; + struct yaffs_tnode *tn; + int nread = 0; + + ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) == + sizeof(base_chunk)); + + while (ok && (~base_chunk)) { + nread++; + /* Read level 0 tnode */ + + tn = yaffs_get_tnode(dev); + if (tn) + ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) == + dev->tnode_size); + else + ok = 0; + + if (tn && ok) + ok = yaffs_add_find_tnode_0(dev, + file_stuct_ptr, + base_chunk, tn) ? 1 : 0; + + if (ok) + ok = (yaffs2_checkpt_rd + (dev, &base_chunk, + sizeof(base_chunk)) == sizeof(base_chunk)); + } + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "Checkpoint read tnodes %d records, last %d. ok %d", + nread, base_chunk, ok); + + return ok ? 1 : 0; +} + +static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj; + struct yaffs_checkpt_obj cp; + int i; + int ok = 1; + struct list_head *lh; + + /* Iterate through the objects in each hash entry, + * dumping them to the checkpointing stream. + */ + + for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) { + list_for_each(lh, &dev->obj_bucket[i].list) { + obj = list_entry(lh, struct yaffs_obj, hash_link); + if (!obj->defered_free) { + yaffs2_obj_checkpt_obj(&cp, obj); + cp.struct_type = sizeof(cp); + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "Checkpoint write object %d parent %d type %d chunk %d obj addr %p", + cp.obj_id, cp.parent_id, + cp.variant_type, cp.hdr_chunk, obj); + + ok = (yaffs2_checkpt_wr(dev, &cp, + sizeof(cp)) == sizeof(cp)); + + if (ok && + obj->variant_type == + YAFFS_OBJECT_TYPE_FILE) + ok = yaffs2_wr_checkpt_tnodes(obj); + } + } + } + + /* Dump end of list */ + memset(&cp, 0xff, sizeof(struct yaffs_checkpt_obj)); + cp.struct_type = sizeof(cp); + + if (ok) + ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); + + return ok ? 1 : 0; +} + +static int yaffs2_rd_checkpt_objs(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj; + struct yaffs_checkpt_obj cp; + int ok = 1; + int done = 0; + LIST_HEAD(hard_list); + + + while (ok && !done) { + ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); + if (cp.struct_type != sizeof(cp)) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "struct size %d instead of %d ok %d", + cp.struct_type, (int)sizeof(cp), ok); + ok = 0; + } + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "Checkpoint read object %d parent %d type %d chunk %d ", + cp.obj_id, cp.parent_id, cp.variant_type, + cp.hdr_chunk); + + if (ok && cp.obj_id == ~0) { + done = 1; + } else if (ok) { + obj = + yaffs_find_or_create_by_number(dev, cp.obj_id, + cp.variant_type); + if (obj) { + ok = yaffs2_checkpt_obj_to_obj(obj, &cp); + if (!ok) + break; + if (obj->variant_type == + YAFFS_OBJECT_TYPE_FILE) { + ok = yaffs2_rd_checkpt_tnodes(obj); + } else if (obj->variant_type == + YAFFS_OBJECT_TYPE_HARDLINK) { + list_add(&obj->hard_links, &hard_list); + } + } else { + ok = 0; + } + } + } + + if (ok) + yaffs_link_fixup(dev, &hard_list); + + return ok ? 1 : 0; +} + +static int yaffs2_wr_checkpt_sum(struct yaffs_dev *dev) +{ + u32 checkpt_sum; + int ok; + + yaffs2_get_checkpt_sum(dev, &checkpt_sum); + + ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) == + sizeof(checkpt_sum)); + + if (!ok) + return 0; + + return 1; +} + +static int yaffs2_rd_checkpt_sum(struct yaffs_dev *dev) +{ + u32 checkpt_sum0; + u32 checkpt_sum1; + int ok; + + yaffs2_get_checkpt_sum(dev, &checkpt_sum0); + + ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) == + sizeof(checkpt_sum1)); + + if (!ok) + return 0; + + if (checkpt_sum0 != checkpt_sum1) + return 0; + + return 1; +} + +static int yaffs2_wr_checkpt_data(struct yaffs_dev *dev) +{ + int ok = 1; + + if (!yaffs2_checkpt_required(dev)) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "skipping checkpoint write"); + ok = 0; + } + + if (ok) + ok = yaffs2_checkpt_open(dev, 1); + + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "write checkpoint validity"); + ok = yaffs2_wr_checkpt_validity_marker(dev, 1); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "write checkpoint device"); + ok = yaffs2_wr_checkpt_dev(dev); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "write checkpoint objects"); + ok = yaffs2_wr_checkpt_objs(dev); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "write checkpoint validity"); + ok = yaffs2_wr_checkpt_validity_marker(dev, 0); + } + + if (ok) + ok = yaffs2_wr_checkpt_sum(dev); + + if (!yaffs_checkpt_close(dev)) + ok = 0; + + if (ok) + dev->is_checkpointed = 1; + else + dev->is_checkpointed = 0; + + return dev->is_checkpointed; +} + +static int yaffs2_rd_checkpt_data(struct yaffs_dev *dev) +{ + int ok = 1; + + if (!dev->param.is_yaffs2) + ok = 0; + + if (ok && dev->param.skip_checkpt_rd) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "skipping checkpoint read"); + ok = 0; + } + + if (ok) + ok = yaffs2_checkpt_open(dev, 0); /* open for read */ + + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint validity"); + ok = yaffs2_rd_checkpt_validity_marker(dev, 1); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint device"); + ok = yaffs2_rd_checkpt_dev(dev); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint objects"); + ok = yaffs2_rd_checkpt_objs(dev); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint validity"); + ok = yaffs2_rd_checkpt_validity_marker(dev, 0); + } + + if (ok) { + ok = yaffs2_rd_checkpt_sum(dev); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint checksum %d", ok); + } + + if (!yaffs_checkpt_close(dev)) + ok = 0; + + if (ok) + dev->is_checkpointed = 1; + else + dev->is_checkpointed = 0; + + return ok ? 1 : 0; +} + +void yaffs2_checkpt_invalidate(struct yaffs_dev *dev) +{ + if (dev->is_checkpointed || dev->blocks_in_checkpt > 0) { + dev->is_checkpointed = 0; + yaffs2_checkpt_invalidate_stream(dev); + } + if (dev->param.sb_dirty_fn) + dev->param.sb_dirty_fn(dev); +} + +int yaffs_checkpoint_save(struct yaffs_dev *dev) +{ + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "save entry: is_checkpointed %d", + dev->is_checkpointed); + + yaffs_verify_objects(dev); + yaffs_verify_blocks(dev); + yaffs_verify_free_chunks(dev); + + if (!dev->is_checkpointed) { + yaffs2_checkpt_invalidate(dev); + yaffs2_wr_checkpt_data(dev); + } + + yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT, + "save exit: is_checkpointed %d", + dev->is_checkpointed); + + return dev->is_checkpointed; +} + +int yaffs2_checkpt_restore(struct yaffs_dev *dev) +{ + int retval; + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "restore entry: is_checkpointed %d", + dev->is_checkpointed); + + retval = yaffs2_rd_checkpt_data(dev); + + if (dev->is_checkpointed) { + yaffs_verify_objects(dev); + yaffs_verify_blocks(dev); + yaffs_verify_free_chunks(dev); + } + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "restore exit: is_checkpointed %d", + dev->is_checkpointed); + + return retval; +} + +int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size) +{ + /* if new_size > old_file_size. + * We're going to be writing a hole. + * If the hole is small then write zeros otherwise write a start + * of hole marker. + */ + loff_t old_file_size; + loff_t increase; + int small_hole; + int result = YAFFS_OK; + struct yaffs_dev *dev = NULL; + u8 *local_buffer = NULL; + int small_increase_ok = 0; + + if (!obj) + return YAFFS_FAIL; + + if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) + return YAFFS_FAIL; + + dev = obj->my_dev; + + /* Bail out if not yaffs2 mode */ + if (!dev->param.is_yaffs2) + return YAFFS_OK; + + old_file_size = obj->variant.file_variant.file_size; + + if (new_size <= old_file_size) + return YAFFS_OK; + + increase = new_size - old_file_size; + + if (increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk && + yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1)) + small_hole = 1; + else + small_hole = 0; + + if (small_hole) + local_buffer = yaffs_get_temp_buffer(dev); + + if (local_buffer) { + /* fill hole with zero bytes */ + loff_t pos = old_file_size; + int this_write; + int written; + memset(local_buffer, 0, dev->data_bytes_per_chunk); + small_increase_ok = 1; + + while (increase > 0 && small_increase_ok) { + this_write = increase; + if (this_write > dev->data_bytes_per_chunk) + this_write = dev->data_bytes_per_chunk; + written = + yaffs_do_file_wr(obj, local_buffer, pos, this_write, + 0); + if (written == this_write) { + pos += this_write; + increase -= this_write; + } else { + small_increase_ok = 0; + } + } + + yaffs_release_temp_buffer(dev, local_buffer); + + /* If out of space then reverse any chunks we've added */ + if (!small_increase_ok) + yaffs_resize_file_down(obj, old_file_size); + } + + if (!small_increase_ok && + obj->parent && + obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED && + obj->parent->obj_id != YAFFS_OBJECTID_DELETED) { + /* Write a hole start header with the old file size */ + yaffs_update_oh(obj, NULL, 0, 1, 0, NULL); + } + + return result; +} + +struct yaffs_block_index { + int seq; + int block; +}; + +static int yaffs2_ybicmp(const void *a, const void *b) +{ + int aseq = ((struct yaffs_block_index *)a)->seq; + int bseq = ((struct yaffs_block_index *)b)->seq; + int ablock = ((struct yaffs_block_index *)a)->block; + int bblock = ((struct yaffs_block_index *)b)->block; + + if (aseq == bseq) + return ablock - bblock; + + return aseq - bseq; +} + +static inline int yaffs2_scan_chunk(struct yaffs_dev *dev, + struct yaffs_block_info *bi, + int blk, int chunk_in_block, + int *found_chunks, + u8 *chunk_data, + struct list_head *hard_list, + int summary_available) +{ + struct yaffs_obj_hdr *oh; + struct yaffs_obj *in; + struct yaffs_obj *parent; + int equiv_id; + loff_t file_size; + int is_shrink; + int is_unlinked; + struct yaffs_ext_tags tags; + int result; + int alloc_failed = 0; + int chunk = blk * dev->param.chunks_per_block + chunk_in_block; + struct yaffs_file_var *file_var; + struct yaffs_hardlink_var *hl_var; + struct yaffs_symlink_var *sl_var; + + if (summary_available) { + result = yaffs_summary_fetch(dev, &tags, chunk_in_block); + tags.seq_number = bi->seq_number; + } + + if (!summary_available || tags.obj_id == 0) { + result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, &tags); + dev->tags_used++; + } else { + dev->summary_used++; + } + + /* Let's have a good look at this chunk... */ + + if (!tags.chunk_used) { + /* An unassigned chunk in the block. + * If there are used chunks after this one, then + * it is a chunk that was skipped due to failing + * the erased check. Just skip it so that it can + * be deleted. + * But, more typically, We get here when this is + * an unallocated chunk and his means that + * either the block is empty or this is the one + * being allocated from + */ + + if (*found_chunks) { + /* This is a chunk that was skipped due + * to failing the erased check */ + } else if (chunk_in_block == 0) { + /* We're looking at the first chunk in + * the block so the block is unused */ + bi->block_state = YAFFS_BLOCK_STATE_EMPTY; + dev->n_erased_blocks++; + } else { + if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN || + bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { + if (dev->seq_number == bi->seq_number) { + /* Allocating from this block*/ + yaffs_trace(YAFFS_TRACE_SCAN, + " Allocating from %d %d", + blk, chunk_in_block); + + bi->block_state = + YAFFS_BLOCK_STATE_ALLOCATING; + dev->alloc_block = blk; + dev->alloc_page = chunk_in_block; + dev->alloc_block_finder = blk; + } else { + /* This is a partially written block + * that is not the current + * allocation block. + */ + yaffs_trace(YAFFS_TRACE_SCAN, + "Partially written block %d detected. gc will fix this.", + blk); + } + } + } + + dev->n_free_chunks++; + + } else if (tags.ecc_result == + YAFFS_ECC_RESULT_UNFIXED) { + yaffs_trace(YAFFS_TRACE_SCAN, + " Unfixed ECC in chunk(%d:%d), chunk ignored", + blk, chunk_in_block); + dev->n_free_chunks++; + } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID || + tags.chunk_id > YAFFS_MAX_CHUNK_ID || + tags.obj_id == YAFFS_OBJECTID_SUMMARY || + (tags.chunk_id > 0 && + tags.n_bytes > dev->data_bytes_per_chunk) || + tags.seq_number != bi->seq_number) { + yaffs_trace(YAFFS_TRACE_SCAN, + "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored", + blk, chunk_in_block, tags.obj_id, + tags.chunk_id, tags.n_bytes); + dev->n_free_chunks++; + } else if (tags.chunk_id > 0) { + /* chunk_id > 0 so it is a data chunk... */ + loff_t endpos; + loff_t chunk_base = (tags.chunk_id - 1) * + dev->data_bytes_per_chunk; + + *found_chunks = 1; + + yaffs_set_chunk_bit(dev, blk, chunk_in_block); + bi->pages_in_use++; + + in = yaffs_find_or_create_by_number(dev, + tags.obj_id, + YAFFS_OBJECT_TYPE_FILE); + if (!in) + /* Out of memory */ + alloc_failed = 1; + + if (in && + in->variant_type == YAFFS_OBJECT_TYPE_FILE && + chunk_base < in->variant.file_variant.shrink_size) { + /* This has not been invalidated by + * a resize */ + if (!yaffs_put_chunk_in_file(in, tags.chunk_id, + chunk, -1)) + alloc_failed = 1; + + /* File size is calculated by looking at + * the data chunks if we have not + * seen an object header yet. + * Stop this practice once we find an + * object header. + */ + endpos = chunk_base + tags.n_bytes; + + if (!in->valid && + in->variant.file_variant.scanned_size < endpos) { + in->variant.file_variant. + scanned_size = endpos; + in->variant.file_variant. + file_size = endpos; + } + } else if (in) { + /* This chunk has been invalidated by a + * resize, or a past file deletion + * so delete the chunk*/ + yaffs_chunk_del(dev, chunk, 1, __LINE__); + } + } else { + /* chunk_id == 0, so it is an ObjectHeader. + * Thus, we read in the object header and make + * the object + */ + *found_chunks = 1; + + yaffs_set_chunk_bit(dev, blk, chunk_in_block); + bi->pages_in_use++; + + oh = NULL; + in = NULL; + + if (tags.extra_available) { + in = yaffs_find_or_create_by_number(dev, + tags.obj_id, + tags.extra_obj_type); + if (!in) + alloc_failed = 1; + } + + if (!in || + (!in->valid && dev->param.disable_lazy_load) || + tags.extra_shadows || + (!in->valid && (tags.obj_id == YAFFS_OBJECTID_ROOT || + tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND))) { + + /* If we don't have valid info then we + * need to read the chunk + * TODO In future we can probably defer + * reading the chunk and living with + * invalid data until needed. + */ + + result = yaffs_rd_chunk_tags_nand(dev, + chunk, + chunk_data, + NULL); + + oh = (struct yaffs_obj_hdr *)chunk_data; + + if (dev->param.inband_tags) { + /* Fix up the header if they got + * corrupted by inband tags */ + oh->shadows_obj = + oh->inband_shadowed_obj_id; + oh->is_shrink = + oh->inband_is_shrink; + } + + if (!in) { + in = yaffs_find_or_create_by_number(dev, + tags.obj_id, oh->type); + if (!in) + alloc_failed = 1; + } + } + + if (!in) { + /* TODO Hoosterman we have a problem! */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: Could not make object for object %d at chunk %d during scan", + tags.obj_id, chunk); + return YAFFS_FAIL; + } + + if (in->valid) { + /* We have already filled this one. + * We have a duplicate that will be + * discarded, but we first have to suck + * out resize info if it is a file. + */ + if ((in->variant_type == YAFFS_OBJECT_TYPE_FILE) && + ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) || + (tags.extra_available && + tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE) + )) { + loff_t this_size = (oh) ? + yaffs_oh_to_size(oh) : + tags.extra_file_size; + u32 parent_obj_id = (oh) ? + oh->parent_obj_id : + tags.extra_parent_id; + + is_shrink = (oh) ? + oh->is_shrink : + tags.extra_is_shrink; + + /* If it is deleted (unlinked + * at start also means deleted) + * we treat the file size as + * being zeroed at this point. + */ + if (parent_obj_id == YAFFS_OBJECTID_DELETED || + parent_obj_id == YAFFS_OBJECTID_UNLINKED) { + this_size = 0; + is_shrink = 1; + } + + if (is_shrink && + in->variant.file_variant.shrink_size > + this_size) + in->variant.file_variant.shrink_size = + this_size; + + if (is_shrink) + bi->has_shrink_hdr = 1; + } + /* Use existing - destroy this one. */ + yaffs_chunk_del(dev, chunk, 1, __LINE__); + } + + if (!in->valid && in->variant_type != + (oh ? oh->type : tags.extra_obj_type)) + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: Bad object type, %d != %d, for object %d at chunk %d during scan", + oh ? oh->type : tags.extra_obj_type, + in->variant_type, tags.obj_id, + chunk); + + if (!in->valid && + (tags.obj_id == YAFFS_OBJECTID_ROOT || + tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) { + /* We only load some info, don't fiddle + * with directory structure */ + in->valid = 1; + + if (oh) { + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + in->lazy_loaded = 0; + } else { + in->lazy_loaded = 1; + } + in->hdr_chunk = chunk; + + } else if (!in->valid) { + /* we need to load this info */ + in->valid = 1; + in->hdr_chunk = chunk; + if (oh) { + in->variant_type = oh->type; + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + + if (oh->shadows_obj > 0) + yaffs_handle_shadowed_obj(dev, + oh->shadows_obj, 1); + + yaffs_set_obj_name_from_oh(in, oh); + parent = yaffs_find_or_create_by_number(dev, + oh->parent_obj_id, + YAFFS_OBJECT_TYPE_DIRECTORY); + file_size = yaffs_oh_to_size(oh); + is_shrink = oh->is_shrink; + equiv_id = oh->equiv_id; + } else { + in->variant_type = tags.extra_obj_type; + parent = yaffs_find_or_create_by_number(dev, + tags.extra_parent_id, + YAFFS_OBJECT_TYPE_DIRECTORY); + file_size = tags.extra_file_size; + is_shrink = tags.extra_is_shrink; + equiv_id = tags.extra_equiv_id; + in->lazy_loaded = 1; + } + in->dirty = 0; + + if (!parent) + alloc_failed = 1; + + /* directory stuff... + * hook up to parent + */ + + if (parent && + parent->variant_type == YAFFS_OBJECT_TYPE_UNKNOWN) { + /* Set up as a directory */ + parent->variant_type = + YAFFS_OBJECT_TYPE_DIRECTORY; + INIT_LIST_HEAD(&parent-> + variant.dir_variant.children); + } else if (!parent || + parent->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + /* Hoosterman, another problem.... + * Trying to use a non-directory as a directory + */ + + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." + ); + parent = dev->lost_n_found; + } + yaffs_add_obj_to_dir(parent, in); + + is_unlinked = (parent == dev->del_dir) || + (parent == dev->unlinked_dir); + + if (is_shrink) + /* Mark the block */ + bi->has_shrink_hdr = 1; + + /* Note re hardlinks. + * Since we might scan a hardlink before its equivalent + * object is scanned we put them all in a list. + * After scanning is complete, we should have all the + * objects, so we run through this list and fix up all + * the chains. + */ + + switch (in->variant_type) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Todo got a problem */ + break; + case YAFFS_OBJECT_TYPE_FILE: + file_var = &in->variant.file_variant; + if (file_var->scanned_size < file_size) { + /* This covers the case where the file + * size is greater than the data held. + * This will happen if the file is + * resized to be larger than its + * current data extents. + */ + file_var->file_size = file_size; + file_var->scanned_size = file_size; + } + + if (file_var->shrink_size > file_size) + file_var->shrink_size = file_size; + + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + hl_var = &in->variant.hardlink_variant; + if (!is_unlinked) { + hl_var->equiv_id = equiv_id; + list_add(&in->hard_links, hard_list); + } + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + sl_var = &in->variant.symlink_variant; + if (oh) { + sl_var->alias = + yaffs_clone_str(oh->alias); + if (!sl_var->alias) + alloc_failed = 1; + } + break; + } + } + } + return alloc_failed ? YAFFS_FAIL : YAFFS_OK; +} + +int yaffs2_scan_backwards(struct yaffs_dev *dev) +{ + int blk; + int block_iter; + int start_iter; + int end_iter; + int n_to_scan = 0; + enum yaffs_block_state state; + int c; + int deleted; + LIST_HEAD(hard_list); + struct yaffs_block_info *bi; + u32 seq_number; + int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; + u8 *chunk_data; + int found_chunks; + int alloc_failed = 0; + struct yaffs_block_index *block_index = NULL; + int alt_block_index = 0; + int summary_available; + + yaffs_trace(YAFFS_TRACE_SCAN, + "yaffs2_scan_backwards starts intstartblk %d intendblk %d...", + dev->internal_start_block, dev->internal_end_block); + + dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; + + block_index = + kmalloc(n_blocks * sizeof(struct yaffs_block_index), GFP_NOFS); + + if (!block_index) { + block_index = + vmalloc(n_blocks * sizeof(struct yaffs_block_index)); + alt_block_index = 1; + } + + if (!block_index) { + yaffs_trace(YAFFS_TRACE_SCAN, + "yaffs2_scan_backwards() could not allocate block index!" + ); + return YAFFS_FAIL; + } + + dev->blocks_in_checkpt = 0; + + chunk_data = yaffs_get_temp_buffer(dev); + + /* Scan all the blocks to determine their state */ + bi = dev->block_info; + for (blk = dev->internal_start_block; blk <= dev->internal_end_block; + blk++) { + yaffs_clear_chunk_bits(dev, blk); + bi->pages_in_use = 0; + bi->soft_del_pages = 0; + + yaffs_query_init_block_state(dev, blk, &state, &seq_number); + + bi->block_state = state; + bi->seq_number = seq_number; + + if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) + bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; + if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) + bi->block_state = YAFFS_BLOCK_STATE_DEAD; + + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, + "Block scanning block %d state %d seq %d", + blk, bi->block_state, seq_number); + + if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) { + dev->blocks_in_checkpt++; + + } else if (bi->block_state == YAFFS_BLOCK_STATE_DEAD) { + yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, + "block %d is bad", blk); + } else if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty "); + dev->n_erased_blocks++; + dev->n_free_chunks += dev->param.chunks_per_block; + } else if (bi->block_state == + YAFFS_BLOCK_STATE_NEEDS_SCAN) { + /* Determine the highest sequence number */ + if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER && + seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) { + block_index[n_to_scan].seq = seq_number; + block_index[n_to_scan].block = blk; + n_to_scan++; + if (seq_number >= dev->seq_number) + dev->seq_number = seq_number; + } else { + /* TODO: Nasty sequence number! */ + yaffs_trace(YAFFS_TRACE_SCAN, + "Block scanning block %d has bad sequence number %d", + blk, seq_number); + } + } + bi++; + } + + yaffs_trace(YAFFS_TRACE_SCAN, "%d blocks to be sorted...", n_to_scan); + + cond_resched(); + + /* Sort the blocks by sequence number */ + sort(block_index, n_to_scan, sizeof(struct yaffs_block_index), + yaffs2_ybicmp, NULL); + + cond_resched(); + + yaffs_trace(YAFFS_TRACE_SCAN, "...done"); + + /* Now scan the blocks looking at the data. */ + start_iter = 0; + end_iter = n_to_scan - 1; + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan); + + /* For each block.... backwards */ + for (block_iter = end_iter; + !alloc_failed && block_iter >= start_iter; + block_iter--) { + /* Cooperative multitasking! This loop can run for so + long that watchdog timers expire. */ + cond_resched(); + + /* get the block to scan in the correct order */ + blk = block_index[block_iter].block; + bi = yaffs_get_block_info(dev, blk); + deleted = 0; + + summary_available = yaffs_summary_read(dev, dev->sum_tags, blk); + + /* For each chunk in each block that needs scanning.... */ + found_chunks = 0; + if (summary_available) + c = dev->chunks_per_summary - 1; + else + c = dev->param.chunks_per_block - 1; + + for (/* c is already initialised */; + !alloc_failed && c >= 0 && + (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN || + bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING); + c--) { + /* Scan backwards... + * Read the tags and decide what to do + */ + if (yaffs2_scan_chunk(dev, bi, blk, c, + &found_chunks, chunk_data, + &hard_list, summary_available) == + YAFFS_FAIL) + alloc_failed = 1; + } + + if (bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCAN) { + /* If we got this far while scanning, then the block + * is fully allocated. */ + bi->block_state = YAFFS_BLOCK_STATE_FULL; + } + + /* Now let's see if it was dirty */ + if (bi->pages_in_use == 0 && + !bi->has_shrink_hdr && + bi->block_state == YAFFS_BLOCK_STATE_FULL) { + yaffs_block_became_dirty(dev, blk); + } + } + + yaffs_skip_rest_of_block(dev); + + if (alt_block_index) + vfree(block_index); + else + kfree(block_index); + + /* Ok, we've done all the scanning. + * Fix up the hard link chains. + * We have scanned all the objects, now it's time to add these + * hardlinks. + */ + yaffs_link_fixup(dev, &hard_list); + + yaffs_release_temp_buffer(dev, chunk_data); + + if (alloc_failed) + return YAFFS_FAIL; + + yaffs_trace(YAFFS_TRACE_SCAN, "yaffs2_scan_backwards ends"); + + return YAFFS_OK; +} diff --git a/fs/yaffs2/yaffs_yaffs2.h b/fs/yaffs2/yaffs_yaffs2.h new file mode 100644 index 0000000..2363bfd --- /dev/null +++ b/fs/yaffs2/yaffs_yaffs2.h @@ -0,0 +1,39 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_YAFFS2_H__ +#define __YAFFS_YAFFS2_H__ + +#include "yaffs_guts.h" + +void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev); +void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev); +void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev, + struct yaffs_block_info *bi); +void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no, + struct yaffs_block_info *bi); +int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi); +u32 yaffs2_find_refresh_block(struct yaffs_dev *dev); +int yaffs2_checkpt_required(struct yaffs_dev *dev); +int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev); + +void yaffs2_checkpt_invalidate(struct yaffs_dev *dev); +int yaffs2_checkpt_save(struct yaffs_dev *dev); +int yaffs2_checkpt_restore(struct yaffs_dev *dev); + +int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size); +int yaffs2_scan_backwards(struct yaffs_dev *dev); + +#endif diff --git a/fs/yaffs2/yaffscfg.c b/fs/yaffs2/yaffscfg.c deleted file mode 100644 index 01399ea..0000000 --- a/fs/yaffs2/yaffscfg.c +++ /dev/null @@ -1,420 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * yaffscfg.c The configuration for the "direct" use of yaffs. - * - * This file is intended to be modified to your requirements. - * There is no need to redistribute this file. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -#include <config.h> -#include "nand.h" -#include "yaffscfg.h" -#include "yaffsfs.h" -#include "yaffs_packedtags2.h" -#include "yaffs_mtdif.h" -#include "yaffs_mtdif2.h" -#if 0 -#include <errno.h> -#else -#include "malloc.h" -#endif - -unsigned yaffs_traceMask = 0x0; /* Disable logging */ -static int yaffs_errno = 0; - -void yaffsfs_SetError(int err) -{ - //Do whatever to set error - yaffs_errno = err; -} - -int yaffsfs_GetError(void) -{ - return yaffs_errno; -} - -void yaffsfs_Lock(void) -{ -} - -void yaffsfs_Unlock(void) -{ -} - -__u32 yaffsfs_CurrentTime(void) -{ - return 0; -} - -void *yaffs_malloc(size_t size) -{ - return malloc(size); -} - -void yaffs_free(void *ptr) -{ - free(ptr); -} - -void yaffsfs_LocalInitialisation(void) -{ - // Define locking semaphore. -} - -// Configuration for: -// /ram 2MB ramdisk -// /boot 2MB boot disk (flash) -// /flash 14MB flash disk (flash) -// NB Though /boot and /flash occupy the same physical device they -// are still disticnt "yaffs_Devices. You may think of these as "partitions" -// using non-overlapping areas in the same device. -// - -#include "yaffs_ramdisk.h" -#include "yaffs_flashif.h" - -static int isMounted = 0; -#define MOUNT_POINT "/flash" -extern nand_info_t nand_info[]; - -/* XXX U-BOOT XXX */ -#if 0 -static yaffs_Device ramDev; -static yaffs_Device bootDev; -static yaffs_Device flashDev; -#endif - -static yaffsfs_DeviceConfiguration yaffsfs_config[] = { -/* XXX U-BOOT XXX */ -#if 0 - { "/ram", &ramDev}, - { "/boot", &bootDev}, - { "/flash", &flashDev}, -#else - { MOUNT_POINT, 0}, -#endif - {(void *)0,(void *)0} -}; - - -int yaffs_StartUp(void) -{ - struct mtd_info *mtd = &nand_info[0]; - int yaffsVersion = 2; - int nBlocks; - - yaffs_Device *flashDev = calloc(1, sizeof(yaffs_Device)); - yaffsfs_config[0].dev = flashDev; - - /* store the mtd device for later use */ - flashDev->genericDevice = mtd; - - // Stuff to configure YAFFS - // Stuff to initialise anything special (eg lock semaphore). - yaffsfs_LocalInitialisation(); - - // Set up devices - -/* XXX U-BOOT XXX */ -#if 0 - // /ram - ramDev.nBytesPerChunk = 512; - ramDev.nChunksPerBlock = 32; - ramDev.nReservedBlocks = 2; // Set this smaller for RAM - ramDev.startBlock = 1; // Can't use block 0 - ramDev.endBlock = 127; // Last block in 2MB. - ramDev.useNANDECC = 1; - ramDev.nShortOpCaches = 0; // Disable caching on this device. - ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat. - ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND; - ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND; - ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND; - ramDev.initialiseNAND = yramdisk_InitialiseNAND; - - // /boot - bootDev.nBytesPerChunk = 612; - bootDev.nChunksPerBlock = 32; - bootDev.nReservedBlocks = 5; - bootDev.startBlock = 1; // Can't use block 0 - bootDev.endBlock = 127; // Last block in 2MB. - bootDev.useNANDECC = 0; // use YAFFS's ECC - bootDev.nShortOpCaches = 10; // Use caches - bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat. - bootDev.writeChunkToNAND = yflash_WriteChunkToNAND; - bootDev.readChunkFromNAND = yflash_ReadChunkFromNAND; - bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND; - bootDev.initialiseNAND = yflash_InitialiseNAND; -#endif - - // /flash - flashDev->nReservedBlocks = 5; -// flashDev->nShortOpCaches = (options.no_cache) ? 0 : 10; - flashDev->nShortOpCaches = 10; // Use caches - flashDev->useNANDECC = 0; // do not use YAFFS's ECC - - if (yaffsVersion == 2) - { - flashDev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND; - flashDev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND; - flashDev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad; - flashDev->queryNANDBlock = nandmtd2_QueryNANDBlock; - flashDev->spareBuffer = YMALLOC(mtd->oobsize); - flashDev->isYaffs2 = 1; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - flashDev->nDataBytesPerChunk = mtd->writesize; - flashDev->nChunksPerBlock = mtd->erasesize / mtd->writesize; -#else - flashDev->nDataBytesPerChunk = mtd->oobblock; - flashDev->nChunksPerBlock = mtd->erasesize / mtd->oobblock; -#endif - nBlocks = mtd->size / mtd->erasesize; - - flashDev->nCheckpointReservedBlocks = 10; - flashDev->startBlock = 0; - flashDev->endBlock = nBlocks - 1; - } - else - { - flashDev->writeChunkToNAND = nandmtd_WriteChunkToNAND; - flashDev->readChunkFromNAND = nandmtd_ReadChunkFromNAND; - flashDev->isYaffs2 = 0; - nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK); - flashDev->startBlock = 320; - flashDev->endBlock = nBlocks - 1; - flashDev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; - flashDev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK; - } - - /* ... and common functions */ - flashDev->eraseBlockInNAND = nandmtd_EraseBlockInNAND; - flashDev->initialiseNAND = nandmtd_InitialiseNAND; - - yaffs_initialise(yaffsfs_config); - - return 0; -} - - -void make_a_file(char *yaffsName,char bval,int sizeOfFile) -{ - int outh; - int i; - unsigned char buffer[100]; - - outh = yaffs_open(yaffsName, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE); - if (outh < 0) - { - printf("Error opening file: %d\n", outh); - return; - } - - memset(buffer,bval,100); - - do{ - i = sizeOfFile; - if(i > 100) i = 100; - sizeOfFile -= i; - - yaffs_write(outh,buffer,i); - - } while (sizeOfFile > 0); - - - yaffs_close(outh); -} - -void read_a_file(char *fn) -{ - int h; - int i = 0; - unsigned char b; - - h = yaffs_open(fn, O_RDWR,0); - if(h<0) - { - printf("File not found\n"); - return; - } - - while(yaffs_read(h,&b,1)> 0) - { - printf("%02x ",b); - i++; - if(i > 32) - { - printf("\n"); - i = 0;; - } - } - printf("\n"); - yaffs_close(h); -} - -void cmd_yaffs_mount(char *mp) -{ - yaffs_StartUp(); - int retval = yaffs_mount(mp); - if( retval != -1) - isMounted = 1; - else - printf("Error mounting %s, return value: %d\n", mp, yaffsfs_GetError()); -} - -static void checkMount(void) -{ - if( !isMounted ) - { - cmd_yaffs_mount(MOUNT_POINT); - } -} - -void cmd_yaffs_umount(char *mp) -{ - checkMount(); - if( yaffs_unmount(mp) == -1) - printf("Error umounting %s, return value: %d\n", mp, yaffsfs_GetError()); -} - -void cmd_yaffs_write_file(char *yaffsName,char bval,int sizeOfFile) -{ - checkMount(); - make_a_file(yaffsName,bval,sizeOfFile); -} - - -void cmd_yaffs_read_file(char *fn) -{ - checkMount(); - read_a_file(fn); -} - - -void cmd_yaffs_mread_file(char *fn, char *addr) -{ - int h; - struct yaffs_stat s; - - checkMount(); - - yaffs_stat(fn,&s); - - printf ("Copy %s to 0x%p... ", fn, addr); - h = yaffs_open(fn, O_RDWR,0); - if(h<0) - { - printf("File not found\n"); - return; - } - - yaffs_read(h,addr,(int)s.st_size); - printf("\t[DONE]\n"); - - yaffs_close(h); -} - - -void cmd_yaffs_mwrite_file(char *fn, char *addr, int size) -{ - int outh; - - checkMount(); - outh = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE); - if (outh < 0) - { - printf("Error opening file: %d\n", outh); - } - - yaffs_write(outh,addr,size); - - yaffs_close(outh); -} - - -void cmd_yaffs_ls(const char *mountpt, int longlist) -{ - int i; - yaffs_DIR *d; - yaffs_dirent *de; - struct yaffs_stat stat; - char tempstr[255]; - - checkMount(); - d = yaffs_opendir(mountpt); - - if(!d) - { - printf("opendir failed\n"); - } - else - { - for(i = 0; (de = yaffs_readdir(d)) != NULL; i++) - { - if (longlist) - { - sprintf(tempstr, "%s/%s", mountpt, de->d_name); - yaffs_stat(tempstr, &stat); - printf("%-25s\t%7ld\n",de->d_name, stat.st_size); - } - else - { - printf("%s\n",de->d_name); - } - } - } -} - - -void cmd_yaffs_mkdir(const char *dir) -{ - checkMount(); - - int retval = yaffs_mkdir(dir, 0); - - if ( retval < 0) - printf("yaffs_mkdir returning error: %d\n", retval); -} - -void cmd_yaffs_rmdir(const char *dir) -{ - checkMount(); - - int retval = yaffs_rmdir(dir); - - if ( retval < 0) - printf("yaffs_rmdir returning error: %d\n", retval); -} - -void cmd_yaffs_rm(const char *path) -{ - checkMount(); - - int retval = yaffs_unlink(path); - - if ( retval < 0) - printf("yaffs_unlink returning error: %d\n", retval); -} - -void cmd_yaffs_mv(const char *oldPath, const char *newPath) -{ - checkMount(); - - int retval = yaffs_rename(newPath, oldPath); - - if ( retval < 0) - printf("yaffs_unlink returning error: %d\n", retval); -} diff --git a/fs/yaffs2/yaffscfg.h b/fs/yaffs2/yaffscfg.h index 3503dc8..718504e 100644 --- a/fs/yaffs2/yaffscfg.h +++ b/fs/yaffs2/yaffscfg.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -23,23 +23,16 @@ #define __YAFFSCFG_H__ -#include "devextras.h" +#include "yportenv.h" -#define YAFFSFS_N_HANDLES 200 +#define YAFFSFS_N_HANDLES 100 +#define YAFFSFS_N_DSC 20 -typedef struct { - const char *prefix; - struct yaffs_DeviceStruct *dev; -} yaffsfs_DeviceConfiguration; +struct yaffsfs_DeviceConfiguration { + const YCHAR *prefix; + struct yaffs_dev *dev; +}; -void yaffsfs_Lock(void); -void yaffsfs_Unlock(void); - -__u32 yaffsfs_CurrentTime(void); - -void yaffsfs_SetError(int err); -int yaffsfs_GetError(void); - #endif diff --git a/fs/yaffs2/yaffsfs.c b/fs/yaffs2/yaffsfs.c index 111cb34..9f1397b 100644 --- a/fs/yaffs2/yaffsfs.c +++ b/fs/yaffs2/yaffsfs.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,19 +11,13 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> -#include <malloc.h> - #include "yaffsfs.h" #include "yaffs_guts.h" #include "yaffscfg.h" #include "yportenv.h" +#include "yaffs_trace.h" -/* XXX U-BOOT XXX */ -#if 0 -#include <string.h> // for memset -#endif +#include "string.h" #define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5 @@ -31,452 +25,968 @@ #define NULL ((void *)0) #endif +/* YAFFSFS_RW_SIZE must be a power of 2 */ +#define YAFFSFS_RW_SHIFT (13) +#define YAFFSFS_RW_SIZE (1<<YAFFSFS_RW_SHIFT) -const char *yaffsfs_c_version="$Id: yaffsfs.c,v 1.18 2007/07/18 19:40:38 charles Exp $"; - -// configurationList is the list of devices that are supported -static yaffsfs_DeviceConfiguration *yaffsfs_configurationList; +/* Some forward references */ +static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory, + const YCHAR *path, + int symDepth, int getEquiv, + struct yaffs_obj **dirOut, + int *notDir, int *loop); +static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj); -/* Some forward references */ -static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path, int symDepth); -static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj); +unsigned int yaffs_wr_attempts; +/* + * Handle management. + * There are open inodes in struct yaffsfs_Inode. + * There are open file descriptors in yaffsfs_FileDes. + * There are open handles in yaffsfs_FileDes. + * + * Things are structured this way to be like the Linux VFS model + * so that interactions with the yaffs guts calls are similar. + * That means more common code paths and less special code. + * That means better testing etc. + * + * We have 3 layers because: + * A handle is different than an fd because you can use dup() + * to create a new handle that accesses the *same* fd. The two + * handles will use the same offset (part of the fd). We only close + * down the fd when there are no more handles accessing it. + * + * More than one fd can currently access one file, but each fd + * has its own permsiions and offset. + */ -// Handle management. -// +struct yaffsfs_Inode { + int count; /* Number of handles accessing this inode */ + struct yaffs_obj *iObj; +}; + +struct yaffsfs_FileDes { + u8 reading:1; + u8 writing:1; + u8 append:1; + u8 shareRead:1; + u8 shareWrite:1; + int inodeId:12; /* Index to corresponding yaffsfs_Inode */ + int handleCount:10; /* Number of handles for this fd */ + loff_t position; /* current position in file */ +}; + +struct yaffsfs_Handle { + short int fdId; + short int useCount; +}; + + +struct yaffsfs_DirSearchContxt { + struct yaffs_dirent de; /* directory entry */ + YCHAR name[NAME_MAX + 1]; /* name of directory being searched */ + struct yaffs_obj *dirObj; /* ptr to directory being searched */ + struct yaffs_obj *nextReturn; /* obj returned by next readddir */ + struct list_head others; + int offset:20; + unsigned inUse:1; +}; +static struct yaffsfs_DirSearchContxt yaffsfs_dsc[YAFFSFS_N_DSC]; +static struct yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES]; +static struct yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES]; +static struct yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES]; -unsigned int yaffs_wr_attempts; +static int yaffsfs_handlesInitialised; -typedef struct +unsigned yaffs_set_trace(unsigned tm) { - __u8 inUse:1; // this handle is in use - __u8 readOnly:1; // this handle is read only - __u8 append:1; // append only - __u8 exclusive:1; // exclusive - __u32 position; // current position in file - yaffs_Object *obj; // the object -}yaffsfs_Handle; + yaffs_trace_mask = tm; + return yaffs_trace_mask; +} +unsigned yaffs_get_trace(void) +{ + return yaffs_trace_mask; +} -static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES]; +/* + * yaffsfs_InitHandle + * Inilitalise handle management on start-up. + */ -// yaffsfs_InitHandle -/// Inilitalise handles on start-up. -// -static int yaffsfs_InitHandles(void) +static void yaffsfs_InitHandles(void) { int i; - for(i = 0; i < YAFFSFS_N_HANDLES; i++) - { - yaffsfs_handle[i].inUse = 0; - yaffsfs_handle[i].obj = NULL; - } - return 0; + if (yaffsfs_handlesInitialised) + return; + + memset(yaffsfs_inode, 0, sizeof(yaffsfs_inode)); + memset(yaffsfs_fd, 0, sizeof(yaffsfs_fd)); + memset(yaffsfs_handle, 0, sizeof(yaffsfs_handle)); + memset(yaffsfs_dsc, 0, sizeof(yaffsfs_dsc)); + + for (i = 0; i < YAFFSFS_N_HANDLES; i++) + yaffsfs_fd[i].inodeId = -1; + for (i = 0; i < YAFFSFS_N_HANDLES; i++) + yaffsfs_handle[i].fdId = -1; } -yaffsfs_Handle *yaffsfs_GetHandlePointer(int h) +static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h) { - if(h < 0 || h >= YAFFSFS_N_HANDLES) - { - return NULL; - } + if (h >= 0 && h < YAFFSFS_N_HANDLES) + return &yaffsfs_handle[h]; + return NULL; +} + +static struct yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle) +{ + struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); + + if (h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES) + return &yaffsfs_fd[h->fdId]; - return &yaffsfs_handle[h]; + return NULL; } -yaffs_Object *yaffsfs_GetHandleObject(int handle) +static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle) { - yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); + struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle); - if(h && h->inUse) - { - return h->obj; - } + if (fd && fd->handleCount > 0 && + fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES) + return &yaffsfs_inode[fd->inodeId]; return NULL; } +static struct yaffs_obj *yaffsfs_HandleToObject(int handle) +{ + struct yaffsfs_Inode *in = yaffsfs_HandleToInode(handle); + + if (in) + return in->iObj; + + return NULL; +} + +/* + * yaffsfs_FindInodeIdForObject + * Find the inode entry for an object, if it exists. + */ -//yaffsfs_GetHandle -// Grab a handle (when opening a file) -// +static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj) +{ + int i; + int ret = -1; + + if (obj) + obj = yaffs_get_equivalent_obj(obj); + + /* Look for it in open inode table */ + for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) { + if (yaffsfs_inode[i].iObj == obj) + ret = i; + } + return ret; +} -static int yaffsfs_GetHandle(void) +/* + * yaffsfs_GetInodeIdForObject + * Grab an inode entry when opening a new inode. + */ +static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj) { int i; - yaffsfs_Handle *h; - - for(i = 0; i < YAFFSFS_N_HANDLES; i++) - { - h = yaffsfs_GetHandlePointer(i); - if(!h) - { - // todo bug: should never happen + int ret; + struct yaffsfs_Inode *in = NULL; + + if (obj) + obj = yaffs_get_equivalent_obj(obj); + + ret = yaffsfs_FindInodeIdForObject(obj); + + for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) { + if (!yaffsfs_inode[i].iObj) + ret = i; + } + + if (ret >= 0) { + in = &yaffsfs_inode[ret]; + if (!in->iObj) + in->count = 0; + in->iObj = obj; + in->count++; + } + + return ret; +} + +static int yaffsfs_CountHandles(struct yaffs_obj *obj) +{ + int i = yaffsfs_FindInodeIdForObject(obj); + + if (i >= 0) + return yaffsfs_inode[i].count; + else + return 0; +} + +static void yaffsfs_ReleaseInode(struct yaffsfs_Inode *in) +{ + struct yaffs_obj *obj; + + obj = in->iObj; + + if (obj->unlinked) + yaffs_del_obj(obj); + + obj->my_inode = NULL; + in->iObj = NULL; + +} + +static void yaffsfs_PutInode(int inodeId) +{ + if (inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES) { + struct yaffsfs_Inode *in = &yaffsfs_inode[inodeId]; + in->count--; + if (in->count <= 0) { + yaffsfs_ReleaseInode(in); + in->count = 0; } - if(!h->inUse) - { - memset(h,0,sizeof(yaffsfs_Handle)); - h->inUse=1; + } +} + +static int yaffsfs_NewHandle(struct yaffsfs_Handle **hptr) +{ + int i; + struct yaffsfs_Handle *h; + + for (i = 0; i < YAFFSFS_N_HANDLES; i++) { + h = &yaffsfs_handle[i]; + if (h->useCount < 1) { + memset(h, 0, sizeof(struct yaffsfs_Handle)); + h->fdId = -1; + h->useCount = 1; + if (hptr) + *hptr = h; return i; } } return -1; } -// yaffs_PutHandle -// Let go of a handle (when closing a file) -// -static int yaffsfs_PutHandle(int handle) +static int yaffsfs_NewHandleAndFileDes(void) { - yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); + int i; + struct yaffsfs_FileDes *fd; + struct yaffsfs_Handle *h = NULL; + int handle = yaffsfs_NewHandle(&h); + + if (handle < 0) + return -1; + + for (i = 0; i < YAFFSFS_N_HANDLES; i++) { + fd = &yaffsfs_fd[i]; + if (fd->handleCount < 1) { + memset(fd, 0, sizeof(struct yaffsfs_FileDes)); + fd->inodeId = -1; + fd->handleCount = 1; + h->fdId = i; + return handle; + } + } + + /* Dump the handle because we could not get a fd */ + h->useCount = 0; + return -1; +} + +/* + * yaffs_get_handle + * Increase use of handle when reading/writing a file + * Also gets the file descriptor. + */ + +static int yaffsfs_GetHandle(int handle) +{ + struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); + + if (h && h->useCount > 0) { + h->useCount++; + return 0; + } + return -1; +} + +/* + * yaffs_put_handle + * Let go of a handle when closing a file or aborting an open or + * ending a read or write. + */ - if(h) - { - h->inUse = 0; - h->obj = NULL; +static int yaffsfs_PutFileDes(int fdId) +{ + struct yaffsfs_FileDes *fd; + + if (fdId >= 0 && fdId < YAFFSFS_N_HANDLES) { + fd = &yaffsfs_fd[fdId]; + fd->handleCount--; + if (fd->handleCount < 1) { + if (fd->inodeId >= 0) { + yaffsfs_PutInode(fd->inodeId); + fd->inodeId = -1; + } + } } return 0; } +static int yaffsfs_PutHandle(int handle) +{ + struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); + if (h && h->useCount > 0) { + h->useCount--; + if (h->useCount < 1) { + yaffsfs_PutFileDes(h->fdId); + h->fdId = -1; + } + } -// Stuff to search for a directory from a path + return 0; +} +static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev) +{ + struct yaffsfs_FileDes *fd; + struct yaffsfs_Handle *h; + struct yaffs_obj *obj; + int i; + for (i = 0; i < YAFFSFS_N_HANDLES; i++) { + h = yaffsfs_HandleToPointer(i); + fd = yaffsfs_HandleToFileDes(i); + obj = yaffsfs_HandleToObject(i); + if (h && h->useCount > 0) { + h->useCount = 0; + h->fdId = 0; + } + if (fd && fd->handleCount > 0 && obj && obj->my_dev == dev) { + fd->handleCount = 0; + yaffsfs_PutInode(fd->inodeId); + fd->inodeId = -1; + } + } +} -int yaffsfs_Match(char a, char b) +/* + * Stuff to handle names. + */ +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE + +static int yaffs_toupper(YCHAR a) +{ + if (a >= 'a' && a <= 'z') + return (a - 'a') + 'A'; + else + return a; +} + +int yaffsfs_Match(YCHAR a, YCHAR b) +{ + return (yaffs_toupper(a) == yaffs_toupper(b)); +} +#else +int yaffsfs_Match(YCHAR a, YCHAR b) { - // case sensitive + /* case sensitive */ return (a == b); } +#endif + +int yaffsfs_IsPathDivider(YCHAR ch) +{ + const YCHAR *str = YAFFS_PATH_DIVIDERS; + + while (*str) { + if (*str == ch) + return 1; + str++; + } + + return 0; +} + +int yaffsfs_CheckNameLength(const char *name) +{ + int retVal = 0; + + int nameLength = yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH + 1); + + if (nameLength == 0) { + yaffsfs_SetError(-ENOENT); + retVal = -1; + } else if (nameLength > YAFFS_MAX_NAME_LENGTH) { + yaffsfs_SetError(-ENAMETOOLONG); + retVal = -1; + } + + return retVal; +} + +static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path) +{ + YCHAR *alt_path = NULL; + int path_length; + int i; + + /* + * We don't have a definition for max path length. + * We will use 3 * max name length instead. + */ + *ret_path = NULL; + path_length = yaffs_strnlen(path, (YAFFS_MAX_NAME_LENGTH + 1) * 3 + 1); + + /* If the last character is a path divider, then we need to + * trim it back so that the name look-up works properly. + * eg. /foo/new_dir/ -> /foo/newdir + * Curveball: Need to handle multiple path dividers: + * eg. /foof/sdfse///// -> /foo/sdfse + */ + if (path_length > 0 && yaffsfs_IsPathDivider(path[path_length - 1])) { + alt_path = kmalloc(path_length + 1, 0); + if (!alt_path) + return -1; + yaffs_strcpy(alt_path, path); + for (i = path_length - 1; + i >= 0 && yaffsfs_IsPathDivider(alt_path[i]); i--) + alt_path[i] = (YCHAR) 0; + } + *ret_path = alt_path; + return 0; +} + +LIST_HEAD(yaffsfs_deviceList); -// yaffsfs_FindDevice -// yaffsfs_FindRoot -// Scan the configuration list to find the root. -// Curveballs: Should match paths that end in '/' too -// Curveball2 Might have "/x/ and "/x/y". Need to return the longest match -static yaffs_Device *yaffsfs_FindDevice(const char *path, char **restOfPath) +/* + * yaffsfs_FindDevice + * yaffsfs_FindRoot + * Scan the configuration list to find the device + * Curveballs: Should match paths that end in '/' too + * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match + */ +static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path, + YCHAR **restOfPath) { - yaffsfs_DeviceConfiguration *cfg = yaffsfs_configurationList; - const char *leftOver; - const char *p; - yaffs_Device *retval = NULL; + struct list_head *cfg; + const YCHAR *leftOver; + const YCHAR *p; + struct yaffs_dev *retval = NULL; + struct yaffs_dev *dev = NULL; int thisMatchLength; int longestMatch = -1; + int matching; - // Check all configs, choose the one that: - // 1) Actually matches a prefix (ie /a amd /abc will not match - // 2) Matches the longest. - while(cfg && cfg->prefix && cfg->dev) - { + /* + * Check all configs, choose the one that: + * 1) Actually matches a prefix (ie /a amd /abc will not match + * 2) Matches the longest. + */ + list_for_each(cfg, &yaffsfs_deviceList) { + dev = list_entry(cfg, struct yaffs_dev, dev_list); leftOver = path; - p = cfg->prefix; + p = dev->param.name; thisMatchLength = 0; + matching = 1; + + while (matching && *p && *leftOver) { + /* Skip over any /s */ + while (yaffsfs_IsPathDivider(*p)) + p++; + + /* Skip over any /s */ + while (yaffsfs_IsPathDivider(*leftOver)) + leftOver++; + + /* Now match the text part */ + while (matching && + *p && !yaffsfs_IsPathDivider(*p) && + *leftOver && !yaffsfs_IsPathDivider(*leftOver)) { + if (yaffsfs_Match(*p, *leftOver)) { + p++; + leftOver++; + thisMatchLength++; + } else { + matching = 0; + } + } + } - while(*p && //unmatched part of prefix - strcmp(p,"/") && // the rest of the prefix is not / (to catch / at end) - *leftOver && - yaffsfs_Match(*p,*leftOver)) - { - p++; + /* Skip over any /s in leftOver */ + while (yaffsfs_IsPathDivider(*leftOver)) leftOver++; - thisMatchLength++; - } - if((!*p || strcmp(p,"/") == 0) && // end of prefix - (!*leftOver || *leftOver == '/') && // no more in this path name part - (thisMatchLength > longestMatch)) - { - // Matched prefix - *restOfPath = (char *)leftOver; - retval = cfg->dev; + + /*Skip over any /s in p */ + while (yaffsfs_IsPathDivider(*p)) + p++; + + /* p should now be at the end of the string if fully matched */ + if (*p) + matching = 0; + + if (matching && (thisMatchLength > longestMatch)) { + /* Matched prefix */ + *restOfPath = (YCHAR *) leftOver; + retval = dev; longestMatch = thisMatchLength; } - cfg++; + } return retval; } -static yaffs_Object *yaffsfs_FindRoot(const char *path, char **restOfPath) +static int yaffsfs_CheckPath(const YCHAR *path) { + int n = 0; + int divs = 0; - yaffs_Device *dev; - - dev= yaffsfs_FindDevice(path,restOfPath); - if(dev && dev->isMounted) - { - return dev->rootDir; + while (*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100) { + if (yaffsfs_IsPathDivider(*path)) { + n = 0; + divs++; + } else + n++; + path++; } + + return (*path) ? -1 : 0; +} + +/* FindMountPoint only returns a dev entry if the path is a mount point */ +static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path) +{ + struct yaffs_dev *dev; + YCHAR *restOfPath = NULL; + + dev = yaffsfs_FindDevice(path, &restOfPath); + if (dev && restOfPath && *restOfPath) + dev = NULL; + return dev; +} + +static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path, + YCHAR **restOfPath) +{ + struct yaffs_dev *dev; + + dev = yaffsfs_FindDevice(path, restOfPath); + if (dev && dev->is_mounted) + return dev->root_dir; + return NULL; } -static yaffs_Object *yaffsfs_FollowLink(yaffs_Object *obj,int symDepth) +static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj, + int symDepth, int *loop) { - while(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - char *alias = obj->variant.symLinkVariant.alias; + if (obj) + obj = yaffs_get_equivalent_obj(obj); - if(*alias == '/') - { - // Starts with a /, need to scan from root up - obj = yaffsfs_FindObject(NULL,alias,symDepth++); - } + while (obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { + YCHAR *alias = obj->variant.symlink_variant.alias; + + if (yaffsfs_IsPathDivider(*alias)) + /* Starts with a /, need to scan from root up */ + obj = yaffsfs_FindObject(NULL, alias, symDepth++, + 1, NULL, NULL, loop); else - { - // Relative to here, so use the parent of the symlink as a start - obj = yaffsfs_FindObject(obj->parent,alias,symDepth++); - } + /* + * Relative to here so use the parent of the + * symlink as a start + */ + obj = yaffsfs_FindObject(obj->parent, alias, symDepth++, + 1, NULL, NULL, loop); } return obj; } - -// yaffsfs_FindDirectory -// Parse a path to determine the directory and the name within the directory. -// -// eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx" -static yaffs_Object *yaffsfs_DoFindDirectory(yaffs_Object *startDir,const char *path,char **name,int symDepth) +/* + * yaffsfs_FindDirectory + * Parse a path to determine the directory and the name within the directory. + * + * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx" + */ +static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir, + const YCHAR *path, + YCHAR **name, int symDepth, + int *notDir, int *loop) { - yaffs_Object *dir; - char *restOfPath; - char str[YAFFS_MAX_NAME_LENGTH+1]; + struct yaffs_obj *dir; + YCHAR *restOfPath; + YCHAR str[YAFFS_MAX_NAME_LENGTH + 1]; int i; - if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) - { + if (symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) { + if (loop) + *loop = 1; return NULL; } - if(startDir) - { + if (startDir) { dir = startDir; - restOfPath = (char *)path; - } - else - { - dir = yaffsfs_FindRoot(path,&restOfPath); - } - - while(dir) - { - // parse off /. - // curve ball: also throw away surplus '/' - // eg. "/ram/x////ff" gets treated the same as "/ram/x/ff" - while(*restOfPath == '/') - { - restOfPath++; // get rid of '/' - } + restOfPath = (YCHAR *) path; + } else + dir = yaffsfs_FindRoot(path, &restOfPath); + + while (dir) { + /* + * parse off /. + * curve ball: also throw away surplus '/' + * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff" + */ + while (yaffsfs_IsPathDivider(*restOfPath)) + restOfPath++; /* get rid of '/' */ *name = restOfPath; i = 0; - while(*restOfPath && *restOfPath != '/') - { - if (i < YAFFS_MAX_NAME_LENGTH) - { + while (*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)) { + if (i < YAFFS_MAX_NAME_LENGTH) { str[i] = *restOfPath; - str[i+1] = '\0'; + str[i + 1] = '\0'; i++; } restOfPath++; } - if(!*restOfPath) - { - // got to the end of the string + if (!*restOfPath) + /* got to the end of the string */ return dir; - } - else - { - if(strcmp(str,".") == 0) - { - // Do nothing - } - else if(strcmp(str,"..") == 0) - { + else { + if (yaffs_strcmp(str, _Y(".")) == 0) { + /* Do nothing */ + } else if (yaffs_strcmp(str, _Y("..")) == 0) { dir = dir->parent; - } - else - { - dir = yaffs_FindObjectByName(dir,str); - - while(dir && dir->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { + } else { + dir = yaffs_find_by_name(dir, str); - dir = yaffsfs_FollowLink(dir,symDepth); + dir = yaffsfs_FollowLink(dir, symDepth, loop); - } - - if(dir && dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { + if (dir && dir->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + if (notDir) + *notDir = 1; dir = NULL; } + } } } - // directory did not exist. + /* directory did not exist. */ return NULL; } -static yaffs_Object *yaffsfs_FindDirectory(yaffs_Object *relativeDirectory,const char *path,char **name,int symDepth) +static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir, + const YCHAR *path, + YCHAR **name, + int symDepth, + int *notDir, int *loop) { - return yaffsfs_DoFindDirectory(relativeDirectory,path,name,symDepth); + return yaffsfs_DoFindDirectory(relDir, path, name, symDepth, notDir, + loop); } -// yaffsfs_FindObject turns a path for an existing object into the object -// -static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path,int symDepth) +/* + * yaffsfs_FindObject turns a path for an existing object into the object + */ +static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir, + const YCHAR *path, int symDepth, + int getEquiv, + struct yaffs_obj **dirOut, + int *notDir, int *loop) { - yaffs_Object *dir; - char *name; + struct yaffs_obj *dir; + struct yaffs_obj *obj; + YCHAR *name; + + dir = + yaffsfs_FindDirectory(relDir, path, &name, symDepth, notDir, loop); + + if (dirOut) + *dirOut = dir; + + if (dir && *name) + obj = yaffs_find_by_name(dir, name); + else + obj = dir; + + if (getEquiv) + obj = yaffs_get_equivalent_obj(obj); + + return obj; +} + +/************************************************************************* + * Start of yaffsfs visible functions. + *************************************************************************/ - dir = yaffsfs_FindDirectory(relativeDirectory,path,&name,symDepth); +int yaffs_dup(int handle) +{ + int newHandleNumber = -1; + struct yaffsfs_FileDes *existingFD = NULL; + struct yaffsfs_Handle *existingHandle = NULL; + struct yaffsfs_Handle *newHandle = NULL; - if(dir && *name) - { - return yaffs_FindObjectByName(dir,name); + yaffsfs_Lock(); + existingHandle = yaffsfs_HandleToPointer(handle); + existingFD = yaffsfs_HandleToFileDes(handle); + if (existingFD) + newHandleNumber = yaffsfs_NewHandle(&newHandle); + if (newHandle) { + newHandle->fdId = existingHandle->fdId; + existingFD->handleCount++; } - return dir; + yaffsfs_Unlock(); + + if (!existingFD) + yaffsfs_SetError(-EBADF); + else if (!newHandle) + yaffsfs_SetError(-ENOMEM); + + return newHandleNumber; + } +static int yaffsfs_TooManyObjects(struct yaffs_dev *dev) +{ + int current_objects = dev->n_obj - dev->n_deleted_files; + if (dev->param.max_objects && current_objects > dev->param.max_objects) + return 1; + else + return 0; +} -int yaffs_open(const char *path, int oflag, int mode) +int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing) { - yaffs_Object *obj = NULL; - yaffs_Object *dir = NULL; - char *name; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + YCHAR *name; int handle = -1; - yaffsfs_Handle *h = NULL; - int alreadyOpen = 0; - int alreadyExclusive = 0; + struct yaffsfs_FileDes *fd = NULL; int openDenied = 0; int symDepth = 0; int errorReported = 0; + int rwflags = oflag & (O_RDWR | O_RDONLY | O_WRONLY); + u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0; + u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0; + u8 sharedReadAllowed; + u8 sharedWriteAllowed; + u8 alreadyReading; + u8 alreadyWriting; + u8 readRequested; + u8 writeRequested; + int notDir = 0; + int loop = 0; - int i; + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + /* O_EXCL only has meaning if O_CREAT is specified */ + if (!(oflag & O_CREAT)) + oflag &= ~(O_EXCL); + + /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */ + if ((oflag & O_CREAT) & (oflag & O_EXCL)) + oflag &= ~(O_TRUNC); + /* Todo: Are there any more flag combos to sanitise ? */ - // todo sanity check oflag (eg. can't have O_TRUNC without WRONLY or RDWR + /* Figure out if reading or writing is requested */ + readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0; + writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0; yaffsfs_Lock(); - handle = yaffsfs_GetHandle(); + handle = yaffsfs_NewHandleAndFileDes(); - if(handle >= 0) - { + if (handle < 0) { + yaffsfs_SetError(-ENFILE); + errorReported = 1; + } else { - h = yaffsfs_GetHandlePointer(handle); + fd = yaffsfs_HandleToFileDes(handle); + /* try to find the exisiting object */ + obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL); - // try to find the exisiting object - obj = yaffsfs_FindObject(NULL,path,0); + obj = yaffsfs_FollowLink(obj, symDepth++, &loop); - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { + if (obj && + obj->variant_type != YAFFS_OBJECT_TYPE_FILE && + obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + obj = NULL; - obj = yaffsfs_FollowLink(obj,symDepth++); - } + if (obj) { - if(obj) - { - // Check if the object is already in use - alreadyOpen = alreadyExclusive = 0; - - for(i = 0; i <= YAFFSFS_N_HANDLES; i++) - { - - if(i != handle && - yaffsfs_handle[i].inUse && - obj == yaffsfs_handle[i].obj) - { - alreadyOpen = 1; - if(yaffsfs_handle[i].exclusive) - { - alreadyExclusive = 1; - } - } - } + /* The file already exists or it might be a directory */ - if(((oflag & O_EXCL) && alreadyOpen) || alreadyExclusive) - { + /* A directory can't be opened as a file */ + if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { openDenied = 1; + yaffsfs_SetError(-EISDIR); + errorReported = 1; } - // Open should fail if O_CREAT and O_EXCL are specified - if((oflag & O_EXCL) && (oflag & O_CREAT)) - { + /* Open should fail if O_CREAT and O_EXCL are specified + * for a file that exists. + */ + if (!errorReported && + (oflag & O_EXCL) && (oflag & O_CREAT)) { openDenied = 1; yaffsfs_SetError(-EEXIST); errorReported = 1; } - // Check file permissions - if( (oflag & (O_RDWR | O_WRONLY)) == 0 && // ie O_RDONLY - !(obj->yst_mode & S_IREAD)) - { + /* Check file permissions */ + if (readRequested && !(obj->yst_mode & S_IREAD)) openDenied = 1; - } - if( (oflag & O_RDWR) && - !(obj->yst_mode & S_IREAD)) - { + if (writeRequested && !(obj->yst_mode & S_IWRITE)) openDenied = 1; - } - if( (oflag & (O_RDWR | O_WRONLY)) && - !(obj->yst_mode & S_IWRITE)) - { + if (!errorReported && writeRequested && + obj->my_dev->read_only) { openDenied = 1; + yaffsfs_SetError(-EROFS); + errorReported = 1; } - } + if (openDenied && !errorReported) { + yaffsfs_SetError(-EACCES); + errorReported = 1; + } + + /* Check sharing of an existing object. */ + if (!openDenied) { + struct yaffsfs_FileDes *fdx; + int i; + + sharedReadAllowed = 1; + sharedWriteAllowed = 1; + alreadyReading = 0; + alreadyWriting = 0; + for (i = 0; i < YAFFSFS_N_HANDLES; i++) { + fdx = &yaffsfs_fd[i]; + if (fdx->handleCount > 0 && + fdx->inodeId >= 0 && + yaffsfs_inode[fdx->inodeId].iObj + == obj) { + if (!fdx->shareRead) + sharedReadAllowed = 0; + if (!fdx->shareWrite) + sharedWriteAllowed = 0; + if (fdx->reading) + alreadyReading = 1; + if (fdx->writing) + alreadyWriting = 1; + } + } - else if((oflag & O_CREAT)) - { - // Let's see if we can create this file - dir = yaffsfs_FindDirectory(NULL,path,&name,0); - if(dir) - { - obj = yaffs_MknodFile(dir,name,mode,0,0); + if ((!sharedReadAllowed && readRequested) || + (!shareRead && alreadyReading) || + (!sharedWriteAllowed && writeRequested) || + (!shareWrite && alreadyWriting)) { + openDenied = 1; + yaffsfs_SetError(-EBUSY); + errorReported = 1; + } } - else - { + + } + + /* If we could not open an existing object, then let's see if + * the directory exists. If not, error. + */ + if (!obj && !errorReported) { + dir = yaffsfs_FindDirectory(NULL, path, &name, 0, + ¬Dir, &loop); + if (!dir && notDir) { yaffsfs_SetError(-ENOTDIR); + errorReported = 1; + } else if (loop) { + yaffsfs_SetError(-ELOOP); + errorReported = 1; + } else if (!dir) { + yaffsfs_SetError(-ENOENT); + errorReported = 1; } } - if(obj && !openDenied) - { - h->obj = obj; - h->inUse = 1; - h->readOnly = (oflag & (O_WRONLY | O_RDWR)) ? 0 : 1; - h->append = (oflag & O_APPEND) ? 1 : 0; - h->exclusive = (oflag & O_EXCL) ? 1 : 0; - h->position = 0; - - obj->inUse++; - if((oflag & O_TRUNC) && !h->readOnly) - { - //todo truncate - yaffs_ResizeFile(obj,0); + if (!obj && dir && !errorReported && (oflag & O_CREAT)) { + /* Let's see if we can create this file */ + if (dir->my_dev->read_only) { + yaffsfs_SetError(-EROFS); + errorReported = 1; + } else if (yaffsfs_TooManyObjects(dir->my_dev)) { + yaffsfs_SetError(-ENFILE); + errorReported = 1; + } else + obj = yaffs_create_file(dir, name, mode, 0, 0); + + if (!obj && !errorReported) { + yaffsfs_SetError(-ENOSPC); + errorReported = 1; } + } + if (!obj && dir && !errorReported && !(oflag & O_CREAT)) { + yaffsfs_SetError(-ENOENT); + errorReported = 1; } - else - { - yaffsfs_PutHandle(handle); - if(!errorReported) - { - yaffsfs_SetError(-EACCESS); - errorReported = 1; + + if (obj && !openDenied) { + int inodeId = yaffsfs_GetInodeIdForObject(obj); + + if (inodeId < 0) { + /* + * Todo: Fix any problem if inodes run out, + * That can't happen if the number of inode + * items >= number of handles. + */ } + + fd->inodeId = inodeId; + fd->reading = readRequested; + fd->writing = writeRequested; + fd->append = (oflag & O_APPEND) ? 1 : 0; + fd->position = 0; + fd->shareRead = shareRead; + fd->shareWrite = shareWrite; + + /* Hook inode to object */ + obj->my_inode = (void *)&yaffsfs_inode[inodeId]; + + if ((oflag & O_TRUNC) && fd->writing) + yaffs_resize_file(obj, 0); + } else { + yaffsfs_PutHandle(handle); + if (!errorReported) + yaffsfs_SetError(0); /* Problem */ handle = -1; } - } yaffsfs_Unlock(); @@ -484,32 +994,68 @@ int yaffs_open(const char *path, int oflag, int mode) return handle; } -int yaffs_close(int fd) +int yaffs_open(const YCHAR *path, int oflag, int mode) { - yaffsfs_Handle *h = NULL; - int retVal = 0; + return yaffs_open_sharing(path, oflag, mode, + YAFFS_SHARE_READ | YAFFS_SHARE_WRITE); +} + +int yaffs_Dofsync(int handle, int datasync) +{ + int retVal = -1; + struct yaffs_obj *obj; yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); + obj = yaffsfs_HandleToObject(handle); - if(h && h->inUse) - { - // clean up - yaffs_FlushFile(h->obj,1); - h->obj->inUse--; - if(h->obj->inUse <= 0 && h->obj->unlinked) - { - yaffs_DeleteFile(h->obj); - } - yaffsfs_PutHandle(fd); + if (!obj) + yaffsfs_SetError(-EBADF); + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else { + yaffs_flush_file(obj, 1, datasync); retVal = 0; } - else - { - // bad handle + + yaffsfs_Unlock(); + + return retVal; +} + +int yaffs_fsync(int handle) +{ + return yaffs_Dofsync(handle, 0); +} + +int yaffs_flush(int handle) +{ + return yaffs_fsync(handle); +} + +int yaffs_fdatasync(int handle) +{ + return yaffs_Dofsync(handle, 1); +} + +int yaffs_close(int handle) +{ + struct yaffsfs_Handle *h = NULL; + struct yaffs_obj *obj = NULL; + int retVal = -1; + + yaffsfs_Lock(); + + h = yaffsfs_HandleToPointer(handle); + obj = yaffsfs_HandleToObject(handle); + + if (!h || !obj) yaffsfs_SetError(-EBADF); - retVal = -1; + else { + /* clean up */ + yaffs_flush_file(obj, 1, 0); + yaffsfs_PutHandle(handle); + retVal = 0; } yaffsfs_Unlock(); @@ -517,378 +1063,774 @@ int yaffs_close(int fd) return retVal; } -int yaffs_read(int fd, void *buf, unsigned int nbyte) +int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte, + int isPread, loff_t offset) { - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = 0; - int nRead = -1; - int maxRead; + struct yaffsfs_FileDes *fd = NULL; + struct yaffs_obj *obj = NULL; + loff_t pos = 0; + loff_t startPos = 0; + loff_t endPos = 0; + int nRead = 0; + int nToRead = 0; + int totalRead = 0; + loff_t maxRead; + u8 *buf = (u8 *) vbuf; + + if (!vbuf) { + yaffsfs_SetError(-EFAULT); + return -1; + } yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); + fd = yaffsfs_HandleToFileDes(handle); + obj = yaffsfs_HandleToObject(handle); - if(!h || !obj) - { - // bad handle + if (!fd || !obj) { + /* bad handle */ yaffsfs_SetError(-EBADF); - } - else if( h && obj) - { - pos= h->position; - if(yaffs_GetObjectFileLength(obj) > pos) - { - maxRead = yaffs_GetObjectFileLength(obj) - pos; - } + totalRead = -1; + } else if (!fd->reading) { + /* Not a reading handle */ + yaffsfs_SetError(-EINVAL); + totalRead = -1; + } else if (nbyte > YAFFS_MAX_FILE_SIZE) { + yaffsfs_SetError(-EINVAL); + totalRead = -1; + } else { + if (isPread) + startPos = offset; + else + startPos = fd->position; + + pos = startPos; + + if (yaffs_get_obj_length(obj) > pos) + maxRead = yaffs_get_obj_length(obj) - pos; else - { maxRead = 0; - } - if(nbyte > maxRead) - { + if (nbyte > maxRead) nbyte = maxRead; + + yaffsfs_GetHandle(handle); + + endPos = pos + nbyte; + + if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE || + nbyte > YAFFS_MAX_FILE_SIZE || + endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) { + totalRead = -1; + nbyte = 0; } + while (nbyte > 0) { + nToRead = YAFFSFS_RW_SIZE - + (pos & (YAFFSFS_RW_SIZE - 1)); + if (nToRead > nbyte) + nToRead = nbyte; + + /* Tricky bit... + * Need to reverify object in case the device was + * unmounted in another thread. + */ + obj = yaffsfs_HandleToObject(handle); + if (!obj) + nRead = 0; + else + nRead = yaffs_file_rd(obj, buf, pos, nToRead); - if(nbyte > 0) - { - nRead = yaffs_ReadDataFromFile(obj,buf,pos,nbyte); - if(nRead >= 0) - { - h->position = pos + nRead; + if (nRead > 0) { + totalRead += nRead; + pos += nRead; + buf += nRead; } + + if (nRead == nToRead) + nbyte -= nRead; else - { - //todo error + nbyte = 0; /* no more to read */ + + if (nbyte > 0) { + yaffsfs_Unlock(); + yaffsfs_Lock(); } + } - else - { - nRead = 0; + + yaffsfs_PutHandle(handle); + + if (!isPread) { + if (totalRead >= 0) + fd->position = startPos + totalRead; + else + yaffsfs_SetError(-EINVAL); } } yaffsfs_Unlock(); + return (totalRead >= 0) ? totalRead : -1; - return (nRead >= 0) ? nRead : -1; +} +int yaffs_read(int handle, void *buf, unsigned int nbyte) +{ + return yaffsfs_do_read(handle, buf, nbyte, 0, 0); } -int yaffs_write(int fd, const void *buf, unsigned int nbyte) +int yaffs_pread(int handle, void *buf, unsigned int nbyte, loff_t offset) { - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = 0; - int nWritten = -1; - int writeThrough = 0; + return yaffsfs_do_read(handle, buf, nbyte, 1, offset); +} + +int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte, + int isPwrite, loff_t offset) +{ + struct yaffsfs_FileDes *fd = NULL; + struct yaffs_obj *obj = NULL; + loff_t pos = 0; + loff_t startPos = 0; + loff_t endPos; + int nWritten = 0; + int totalWritten = 0; + int write_trhrough = 0; + int nToWrite = 0; + const u8 *buf = (const u8 *)vbuf; + + if (!vbuf) { + yaffsfs_SetError(-EFAULT); + return -1; + } yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); + fd = yaffsfs_HandleToFileDes(handle); + obj = yaffsfs_HandleToObject(handle); - if(!h || !obj) - { - // bad handle + if (!fd || !obj) { + /* bad handle */ yaffsfs_SetError(-EBADF); - } - else if( h && obj && h->readOnly) - { - // todo error - } - else if( h && obj) - { - if(h->append) - { - pos = yaffs_GetObjectFileLength(obj); - } + totalWritten = -1; + } else if (!fd->writing) { + yaffsfs_SetError(-EINVAL); + totalWritten = -1; + } else if (obj->my_dev->read_only) { + yaffsfs_SetError(-EROFS); + totalWritten = -1; + } else { + if (fd->append) + startPos = yaffs_get_obj_length(obj); + else if (isPwrite) + startPos = offset; else - { - pos = h->position; - } + startPos = fd->position; - nWritten = yaffs_WriteDataToFile(obj,buf,pos,nbyte,writeThrough); + yaffsfs_GetHandle(handle); + pos = startPos; + endPos = pos + nbyte; - if(nWritten >= 0) - { - h->position = pos + nWritten; + if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE || + nbyte > YAFFS_MAX_FILE_SIZE || + endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) { + totalWritten = -1; + nbyte = 0; } - else - { - //todo error + + while (nbyte > 0) { + + nToWrite = YAFFSFS_RW_SIZE - + (pos & (YAFFSFS_RW_SIZE - 1)); + if (nToWrite > nbyte) + nToWrite = nbyte; + + /* Tricky bit... + * Need to reverify object in case the device was + * remounted or unmounted in another thread. + */ + obj = yaffsfs_HandleToObject(handle); + if (!obj || obj->my_dev->read_only) + nWritten = 0; + else + nWritten = + yaffs_wr_file(obj, buf, pos, nToWrite, + write_trhrough); + if (nWritten > 0) { + totalWritten += nWritten; + pos += nWritten; + buf += nWritten; + } + + if (nWritten == nToWrite) + nbyte -= nToWrite; + else + nbyte = 0; + + if (nWritten < 1 && totalWritten < 1) { + yaffsfs_SetError(-ENOSPC); + totalWritten = -1; + } + + if (nbyte > 0) { + yaffsfs_Unlock(); + yaffsfs_Lock(); + } } + yaffsfs_PutHandle(handle); + + if (!isPwrite) { + if (totalWritten > 0) + fd->position = startPos + totalWritten; + else + yaffsfs_SetError(-EINVAL); + } } yaffsfs_Unlock(); + return (totalWritten >= 0) ? totalWritten : -1; +} + +int yaffs_write(int fd, const void *buf, unsigned int nbyte) +{ + return yaffsfs_do_write(fd, buf, nbyte, 0, 0); +} + +int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, loff_t offset) +{ + return yaffsfs_do_write(fd, buf, nbyte, 1, offset); +} + +int yaffs_truncate(const YCHAR *path, loff_t new_size) +{ + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + int result = YAFFS_FAIL; + int notDir = 0; + int loop = 0; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + yaffsfs_Lock(); - return (nWritten >= 0) ? nWritten : -1; + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + obj = yaffsfs_FollowLink(obj, 0, &loop); + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) + yaffsfs_SetError(-ENOENT); + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) + yaffsfs_SetError(-EISDIR); + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE) + yaffsfs_SetError(-EINVAL); + else + result = yaffs_resize_file(obj, new_size); + + yaffsfs_Unlock(); + + return (result) ? 0 : -1; } -int yaffs_truncate(int fd, off_t newSize) +int yaffs_ftruncate(int handle, loff_t new_size) { - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; + struct yaffsfs_FileDes *fd = NULL; + struct yaffs_obj *obj = NULL; int result = 0; yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); + fd = yaffsfs_HandleToFileDes(handle); + obj = yaffsfs_HandleToObject(handle); - if(!h || !obj) - { - // bad handle + if (!fd || !obj) + /* bad handle */ yaffsfs_SetError(-EBADF); - } + else if (!fd->writing) + yaffsfs_SetError(-EINVAL); + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE) + yaffsfs_SetError(-EINVAL); else - { - // resize the file - result = yaffs_ResizeFile(obj,newSize); - } + /* resize the file */ + result = yaffs_resize_file(obj, new_size); yaffsfs_Unlock(); - return (result) ? 0 : -1; } -off_t yaffs_lseek(int fd, off_t offset, int whence) +loff_t yaffs_lseek(int handle, loff_t offset, int whence) { - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = -1; - int fSize = -1; + struct yaffsfs_FileDes *fd = NULL; + struct yaffs_obj *obj = NULL; + loff_t pos = -1; + loff_t fSize = -1; yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); + fd = yaffsfs_HandleToFileDes(handle); + obj = yaffsfs_HandleToObject(handle); - if(!h || !obj) - { - // bad handle + if (!fd || !obj) yaffsfs_SetError(-EBADF); - } - else if(whence == SEEK_SET) - { - if(offset >= 0) - { - pos = offset; - } - } - else if(whence == SEEK_CUR) - { - if( (h->position + offset) >= 0) - { - pos = (h->position + offset); - } - } - else if(whence == SEEK_END) - { - fSize = yaffs_GetObjectFileLength(obj); - if(fSize >= 0 && (fSize + offset) >= 0) - { - pos = fSize + offset; + else if (offset > YAFFS_MAX_FILE_SIZE) + yaffsfs_SetError(-EINVAL); + else { + if (whence == SEEK_SET) { + if (offset >= 0) + pos = offset; + } else if (whence == SEEK_CUR) { + if ((fd->position + offset) >= 0) + pos = (fd->position + offset); + } else if (whence == SEEK_END) { + fSize = yaffs_get_obj_length(obj); + if (fSize >= 0 && (fSize + offset) >= 0) + pos = fSize + offset; } - } - if(pos >= 0) - { - h->position = pos; - } - else - { - // todo error + if (pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE) + fd->position = pos; + else { + yaffsfs_SetError(-EINVAL); + pos = -1; + } } - yaffsfs_Unlock(); return pos; } - -int yaffsfs_DoUnlink(const char *path,int isDirectory) +int yaffsfs_DoUnlink(const YCHAR *path, int isDirectory) { - yaffs_Object *dir = NULL; - yaffs_Object *obj = NULL; - char *name; + struct yaffs_obj *dir = NULL; + struct yaffs_obj *obj = NULL; + YCHAR *name; int result = YAFFS_FAIL; + int notDir = 0; + int loop = 0; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); - dir = yaffsfs_FindDirectory(NULL,path,&name,0); - if(!dir) - { + obj = yaffsfs_FindObject(NULL, path, 0, 0, NULL, NULL, NULL); + dir = yaffsfs_FindDirectory(NULL, path, &name, 0, ¬Dir, &loop); + + if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); - } - else if(!obj) - { + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir) yaffsfs_SetError(-ENOENT); - } - else if(!isDirectory && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { + else if (yaffs_strncmp(name, _Y("."), 2) == 0) + yaffsfs_SetError(-EINVAL); + else if (!obj) + yaffsfs_SetError(-ENOENT); + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else if (!isDirectory && + obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) yaffsfs_SetError(-EISDIR); - } - else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { + else if (isDirectory && + obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) yaffsfs_SetError(-ENOTDIR); - } - else - { - result = yaffs_Unlink(dir,name); + else if (isDirectory && obj == obj->my_dev->root_dir) + yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */ + else { + result = yaffs_unlinker(dir, name); - if(result == YAFFS_FAIL && isDirectory) - { + if (result == YAFFS_FAIL && isDirectory) yaffsfs_SetError(-ENOTEMPTY); - } } yaffsfs_Unlock(); - // todo error - return (result == YAFFS_FAIL) ? -1 : 0; } -int yaffs_rmdir(const char *path) -{ - return yaffsfs_DoUnlink(path,1); -} -int yaffs_unlink(const char *path) +int yaffs_unlink(const YCHAR *path) { - return yaffsfs_DoUnlink(path,0); + return yaffsfs_DoUnlink(path, 0); } -int yaffs_rename(const char *oldPath, const char *newPath) +int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath) { - yaffs_Object *olddir = NULL; - yaffs_Object *newdir = NULL; - yaffs_Object *obj = NULL; - char *oldname; - char *newname; - int result= YAFFS_FAIL; - int renameAllowed = 1; + struct yaffs_obj *olddir = NULL; + struct yaffs_obj *newdir = NULL; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *newobj = NULL; + YCHAR *oldname; + YCHAR *newname; + int result = YAFFS_FAIL; + int rename_allowed = 1; + int notOldDir = 0; + int notNewDir = 0; + int oldLoop = 0; + int newLoop = 0; - yaffsfs_Lock(); + YCHAR *alt_newpath = NULL; - olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0); - newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0); - obj = yaffsfs_FindObject(NULL,oldPath,0); + if (!oldPath || !newPath) { + yaffsfs_SetError(-EFAULT); + return -1; + } - if(!olddir || !newdir || !obj) - { - // bad file - yaffsfs_SetError(-EBADF); - renameAllowed = 0; + if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; } - else if(olddir->myDev != newdir->myDev) - { - // oops must be on same device - // todo error - yaffsfs_SetError(-EXDEV); - renameAllowed = 0; + + if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) { + yaffsfs_SetError(-ENOMEM); + return -1; } - else if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - // It is a directory, check that it is not being renamed to - // being its own decendent. - // Do this by tracing from the new directory back to the root, checking for obj + if (alt_newpath) + newPath = alt_newpath; - yaffs_Object *xx = newdir; + yaffsfs_Lock(); - while( renameAllowed && xx) - { - if(xx == obj) - { - renameAllowed = 0; - } + olddir = yaffsfs_FindDirectory(NULL, oldPath, &oldname, 0, + ¬OldDir, &oldLoop); + newdir = yaffsfs_FindDirectory(NULL, newPath, &newname, 0, + ¬NewDir, &newLoop); + obj = yaffsfs_FindObject(NULL, oldPath, 0, 0, NULL, NULL, NULL); + newobj = yaffsfs_FindObject(NULL, newPath, 0, 0, NULL, NULL, NULL); + + /* If the object being renamed is a directory and the + * path ended with a "/" then the olddir == obj. + * We pass through NULL for the old name to tell the lower layers + * to use olddir as the object. + */ + + if (olddir == obj) + oldname = NULL; + + if ((!olddir && notOldDir) || (!newdir && notNewDir)) { + yaffsfs_SetError(-ENOTDIR); + rename_allowed = 0; + } else if (oldLoop || newLoop) { + yaffsfs_SetError(-ELOOP); + rename_allowed = 0; + } else if (olddir && oldname && + yaffs_strncmp(oldname, _Y("."), 2) == 0) { + yaffsfs_SetError(-EINVAL); + rename_allowed = 0; + } else if (!olddir || !newdir || !obj) { + yaffsfs_SetError(-ENOENT); + rename_allowed = 0; + } else if (obj->my_dev->read_only) { + yaffsfs_SetError(-EROFS); + rename_allowed = 0; + } else if (yaffs_is_non_empty_dir(newobj)) { + yaffsfs_SetError(-ENOTEMPTY); + rename_allowed = 0; + } else if (olddir->my_dev != newdir->my_dev) { + /* Rename must be on same device */ + yaffsfs_SetError(-EXDEV); + rename_allowed = 0; + } else if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { + /* + * It is a directory, check that it is not being renamed to + * being its own decendent. + * Do this by tracing from the new directory back to the root, + * checking for obj + */ + + struct yaffs_obj *xx = newdir; + + while (rename_allowed && xx) { + if (xx == obj) + rename_allowed = 0; xx = xx->parent; } - if(!renameAllowed) yaffsfs_SetError(-EACCESS); + if (!rename_allowed) + yaffsfs_SetError(-EINVAL); } - if(renameAllowed) - { - result = yaffs_RenameObject(olddir,oldname,newdir,newname); - } + if (rename_allowed) + result = yaffs_rename_obj(olddir, oldname, newdir, newname); yaffsfs_Unlock(); + kfree(alt_newpath); + return (result == YAFFS_FAIL) ? -1 : 0; } - -static int yaffsfs_DoStat(yaffs_Object *obj,struct yaffs_stat *buf) +static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf) { int retVal = -1; - if(obj) - { - obj = yaffs_GetEquivalentObject(obj); - } + obj = yaffs_get_equivalent_obj(obj); - if(obj && buf) - { - buf->st_dev = (int)obj->myDev->genericDevice; - buf->st_ino = obj->objectId; - buf->st_mode = obj->yst_mode & ~S_IFMT; // clear out file type bits + if (obj && buf) { + buf->st_dev = (int)obj->my_dev->os_context; + buf->st_ino = obj->obj_id; + buf->st_mode = obj->yst_mode & ~S_IFMT; - if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { + if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) buf->st_mode |= S_IFDIR; - } - else if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { + else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) buf->st_mode |= S_IFLNK; - } - else if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - { + else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) buf->st_mode |= S_IFREG; - } - buf->st_nlink = yaffs_GetObjectLinkCount(obj); - buf->st_uid = 0; - buf->st_gid = 0;; - buf->st_rdev = obj->yst_rdev; - buf->st_size = yaffs_GetObjectFileLength(obj); - buf->st_blksize = obj->myDev->nDataBytesPerChunk; - buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize; - buf->yst_atime = obj->yst_atime; - buf->yst_ctime = obj->yst_ctime; - buf->yst_mtime = obj->yst_mtime; + buf->st_nlink = yaffs_get_obj_link_count(obj); + buf->st_uid = 0; + buf->st_gid = 0; + buf->st_rdev = obj->yst_rdev; + buf->st_size = yaffs_get_obj_length(obj); + buf->st_blksize = obj->my_dev->data_bytes_per_chunk; + buf->st_blocks = (buf->st_size + buf->st_blksize - 1) / + buf->st_blksize; +#if CONFIG_YAFFS_WINCE + buf->yst_wince_atime[0] = obj->win_atime[0]; + buf->yst_wince_atime[1] = obj->win_atime[1]; + buf->yst_wince_ctime[0] = obj->win_ctime[0]; + buf->yst_wince_ctime[1] = obj->win_ctime[1]; + buf->yst_wince_mtime[0] = obj->win_mtime[0]; + buf->yst_wince_mtime[1] = obj->win_mtime[1]; +#else + buf->yst_atime = obj->yst_atime; + buf->yst_ctime = obj->yst_ctime; + buf->yst_mtime = obj->yst_mtime; +#endif retVal = 0; } return retVal; } -static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int doLStat) +static int yaffsfs_DoStatOrLStat(const YCHAR *path, + struct yaffs_stat *buf, int doLStat) { - yaffs_Object *obj; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + int retVal = -1; + int notDir = 0; + int loop = 0; + + if (!path || !buf) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + + if (!doLStat && obj) + obj = yaffsfs_FollowLink(obj, 0, &loop); + + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) + yaffsfs_SetError(-ENOENT); + else + retVal = yaffsfs_DoStat(obj, buf); + + yaffsfs_Unlock(); + + return retVal; + +} + +int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf) +{ + return yaffsfs_DoStatOrLStat(path, buf, 0); +} + +int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf) +{ + return yaffsfs_DoStatOrLStat(path, buf, 1); +} + +int yaffs_fstat(int fd, struct yaffs_stat *buf) +{ + struct yaffs_obj *obj; int retVal = -1; + if (!buf) { + yaffsfs_SetError(-EFAULT); + return -1; + } + yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); + obj = yaffsfs_HandleToObject(fd); + + if (obj) + retVal = yaffsfs_DoStat(obj, buf); + else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +static int yaffsfs_DoUtime(struct yaffs_obj *obj, + const struct yaffs_utimbuf *buf) +{ + int retVal = -1; + int result; + + struct yaffs_utimbuf local; + + obj = yaffs_get_equivalent_obj(obj); + + if (obj && obj->my_dev->read_only) { + yaffsfs_SetError(-EROFS); + return -1; + } + + if (!buf) { + local.actime = Y_CURRENT_TIME; + local.modtime = local.actime; + buf = &local; + } - if(!doLStat && obj) - { - obj = yaffsfs_FollowLink(obj,0); + if (obj) { + obj->yst_atime = buf->actime; + obj->yst_mtime = buf->modtime; + obj->dirty = 1; + result = yaffs_flush_file(obj, 0, 0); + retVal = result == YAFFS_OK ? 0 : -1; + } + + return retVal; +} + +int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf) +{ + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + int retVal = -1; + int notDir = 0; + int loop = 0; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; } - if(obj) - { - retVal = yaffsfs_DoStat(obj,buf); + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; } + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) + yaffsfs_SetError(-ENOENT); else - { - // todo error not found + retVal = yaffsfs_DoUtime(obj, buf); + + yaffsfs_Unlock(); + + return retVal; + +} + +int yaffs_futime(int fd, const struct yaffs_utimbuf *buf) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + obj = yaffsfs_HandleToObject(fd); + + if (obj) + retVal = yaffsfs_DoUtime(obj, buf); + else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +#ifndef CONFIG_YAFFS_WINCE +/* xattrib functions */ + +static int yaffs_do_setxattr(const YCHAR *path, const char *name, + const void *data, int size, int flags, int follow) +{ + struct yaffs_obj *obj; + struct yaffs_obj *dir; + int notDir = 0; + int loop = 0; + + int retVal = -1; + + if (!path || !name || !data) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + + if (follow) + obj = yaffsfs_FollowLink(obj, 0, &loop); + + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) yaffsfs_SetError(-ENOENT); + else { + retVal = yaffs_set_xattrib(obj, name, data, size, flags); + if (retVal < 0) { + yaffsfs_SetError(retVal); + retVal = -1; + } } yaffsfs_Unlock(); @@ -897,33 +1839,41 @@ static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int do } -int yaffs_stat(const char *path, struct yaffs_stat *buf) +int yaffs_setxattr(const YCHAR *path, const char *name, + const void *data, int size, int flags) { - return yaffsfs_DoStatOrLStat(path,buf,0); + return yaffs_do_setxattr(path, name, data, size, flags, 1); } -int yaffs_lstat(const char *path, struct yaffs_stat *buf) +int yaffs_lsetxattr(const YCHAR *path, const char *name, + const void *data, int size, int flags) { - return yaffsfs_DoStatOrLStat(path,buf,1); + return yaffs_do_setxattr(path, name, data, size, flags, 0); } -int yaffs_fstat(int fd, struct yaffs_stat *buf) +int yaffs_fsetxattr(int fd, const char *name, + const void *data, int size, int flags) { - yaffs_Object *obj; + struct yaffs_obj *obj; int retVal = -1; + if (!name || !data) { + yaffsfs_SetError(-EFAULT); + return -1; + } + yaffsfs_Lock(); - obj = yaffsfs_GetHandleObject(fd); + obj = yaffsfs_HandleToObject(fd); - if(obj) - { - retVal = yaffsfs_DoStat(obj,buf); - } - else - { - // bad handle + if (!obj) yaffsfs_SetError(-EBADF); + else { + retVal = yaffs_set_xattrib(obj, name, data, size, flags); + if (retVal < 0) { + yaffsfs_SetError(retVal); + retVal = -1; + } } yaffsfs_Unlock(); @@ -931,43 +1881,128 @@ int yaffs_fstat(int fd, struct yaffs_stat *buf) return retVal; } -static int yaffsfs_DoChMod(yaffs_Object *obj,mode_t mode) +static int yaffs_do_getxattr(const YCHAR *path, const char *name, + void *data, int size, int follow) { - int result = YAFFS_FAIL; + struct yaffs_obj *obj; + struct yaffs_obj *dir; + int retVal = -1; + int notDir = 0; + int loop = 0; - if(obj) - { - obj = yaffs_GetEquivalentObject(obj); + if (!path || !name || !data) { + yaffsfs_SetError(-EFAULT); + return -1; } - if(obj) - { - obj->yst_mode = mode; - obj->dirty = 1; - result = yaffs_FlushFile(obj,0); + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; } - return result == YAFFS_OK ? 0 : -1; + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + + if (follow) + obj = yaffsfs_FollowLink(obj, 0, &loop); + + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) + yaffsfs_SetError(-ENOENT); + else { + retVal = yaffs_get_xattrib(obj, name, data, size); + if (retVal < 0) { + yaffsfs_SetError(retVal); + retVal = -1; + } + } + yaffsfs_Unlock(); + + return retVal; + } +int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size) +{ + return yaffs_do_getxattr(path, name, data, size, 1); +} -int yaffs_chmod(const char *path, mode_t mode) +int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size) { - yaffs_Object *obj; + return yaffs_do_getxattr(path, name, data, size, 0); +} + +int yaffs_fgetxattr(int fd, const char *name, void *data, int size) +{ + struct yaffs_obj *obj; int retVal = -1; + if (!name || !data) { + yaffsfs_SetError(-EFAULT); + return -1; + } + yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); + obj = yaffsfs_HandleToObject(fd); - if(obj) - { - retVal = yaffsfs_DoChMod(obj,mode); + if (obj) { + retVal = yaffs_get_xattrib(obj, name, data, size); + if (retVal < 0) { + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +static int yaffs_do_listxattr(const YCHAR *path, char *data, + int size, int follow) +{ + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + int retVal = -1; + int notDir = 0; + int loop = 0; + + if (!path || !data) { + yaffsfs_SetError(-EFAULT); + return -1; } - else - { - // todo error not found + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + + if (follow) + obj = yaffsfs_FollowLink(obj, 0, &loop); + + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) yaffsfs_SetError(-ENOENT); + else { + retVal = yaffs_list_xattrib(obj, data, size); + if (retVal < 0) { + yaffsfs_SetError(retVal); + retVal = -1; + } } yaffsfs_Unlock(); @@ -976,317 +2011,906 @@ int yaffs_chmod(const char *path, mode_t mode) } +int yaffs_listxattr(const YCHAR *path, char *data, int size) +{ + return yaffs_do_listxattr(path, data, size, 1); +} -int yaffs_fchmod(int fd, mode_t mode) +int yaffs_llistxattr(const YCHAR *path, char *data, int size) { - yaffs_Object *obj; + return yaffs_do_listxattr(path, data, size, 0); +} + +int yaffs_flistxattr(int fd, char *data, int size) +{ + struct yaffs_obj *obj; int retVal = -1; + if (!data) { + yaffsfs_SetError(-EFAULT); + return -1; + } + yaffsfs_Lock(); - obj = yaffsfs_GetHandleObject(fd); + obj = yaffsfs_HandleToObject(fd); - if(obj) - { - retVal = yaffsfs_DoChMod(obj,mode); - } - else - { - // bad handle + if (obj) { + retVal = yaffs_list_xattrib(obj, data, size); + if (retVal < 0) { + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* bad handle */ yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +static int yaffs_do_removexattr(const YCHAR *path, const char *name, + int follow) +{ + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + int notDir = 0; + int loop = 0; + int retVal = -1; + + if (!path || !name) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + + if (follow) + obj = yaffsfs_FollowLink(obj, 0, &loop); + + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) + yaffsfs_SetError(-ENOENT); + else { + retVal = yaffs_remove_xattrib(obj, name); + if (retVal < 0) { + yaffsfs_SetError(retVal); + retVal = -1; + } + } + + yaffsfs_Unlock(); + + return retVal; + +} + +int yaffs_removexattr(const YCHAR *path, const char *name) +{ + return yaffs_do_removexattr(path, name, 1); +} + +int yaffs_lremovexattr(const YCHAR *path, const char *name) +{ + return yaffs_do_removexattr(path, name, 0); +} + +int yaffs_fremovexattr(int fd, const char *name) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + if (!name) { + yaffsfs_SetError(-EFAULT); + return -1; } + yaffsfs_Lock(); + obj = yaffsfs_HandleToObject(fd); + + if (obj) { + retVal = yaffs_remove_xattrib(obj, name); + if (retVal < 0) { + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* bad handle */ + yaffsfs_SetError(-EBADF); + yaffsfs_Unlock(); return retVal; } +#endif + +#ifdef CONFIG_YAFFS_WINCE +int yaffs_get_wince_times(int fd, unsigned *wctime, + unsigned *watime, unsigned *wmtime) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + obj = yaffsfs_HandleToObject(fd); + + if (obj) { + if (wctime) { + wctime[0] = obj->win_ctime[0]; + wctime[1] = obj->win_ctime[1]; + } + if (watime) { + watime[0] = obj->win_atime[0]; + watime[1] = obj->win_atime[1]; + } + if (wmtime) { + wmtime[0] = obj->win_mtime[0]; + wmtime[1] = obj->win_mtime[1]; + } + + retVal = 0; + } else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); -int yaffs_mkdir(const char *path, mode_t mode) + return retVal; +} + +int yaffs_set_wince_times(int fd, + const unsigned *wctime, + const unsigned *watime, const unsigned *wmtime) { - yaffs_Object *parent = NULL; - yaffs_Object *dir = NULL; - char *name; - int retVal= -1; + struct yaffs_obj *obj; + int result; + int retVal = -1; yaffsfs_Lock(); - parent = yaffsfs_FindDirectory(NULL,path,&name,0); - if(parent) - dir = yaffs_MknodDirectory(parent,name,mode,0,0); - if(dir) - { + obj = yaffsfs_HandleToObject(fd); + + if (obj) { + + if (wctime) { + obj->win_ctime[0] = wctime[0]; + obj->win_ctime[1] = wctime[1]; + } + if (watime) { + obj->win_atime[0] = watime[0]; + obj->win_atime[1] = watime[1]; + } + if (wmtime) { + obj->win_mtime[0] = wmtime[0]; + obj->win_mtime[1] = wmtime[1]; + } + + obj->dirty = 1; + result = yaffs_flush_file(obj, 0, 0); retVal = 0; + } else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +#endif + +static int yaffsfs_DoChMod(struct yaffs_obj *obj, mode_t mode) +{ + int result = -1; + + if (obj) + obj = yaffs_get_equivalent_obj(obj); + + if (obj) { + obj->yst_mode = mode; + obj->dirty = 1; + result = yaffs_flush_file(obj, 0, 0); + } + + return result == YAFFS_OK ? 0 : -1; +} + +int yaffs_access(const YCHAR *path, int amode) +{ + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + int notDir = 0; + int loop = 0; + int retval = -1; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + if (amode & ~(R_OK | W_OK | X_OK)) { + yaffsfs_SetError(-EINVAL); + return -1; + } + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + obj = yaffsfs_FollowLink(obj, 0, &loop); + + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) + yaffsfs_SetError(-ENOENT); + else if ((amode & W_OK) && obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else { + int access_ok = 1; + + if ((amode & R_OK) && !(obj->yst_mode & S_IREAD)) + access_ok = 0; + if ((amode & W_OK) && !(obj->yst_mode & S_IWRITE)) + access_ok = 0; + if ((amode & X_OK) && !(obj->yst_mode & S_IEXEC)) + access_ok = 0; + + if (!access_ok) + yaffsfs_SetError(-EACCES); + else + retval = 0; + } + + yaffsfs_Unlock(); + + return retval; + +} + +int yaffs_chmod(const YCHAR *path, mode_t mode) +{ + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + int retVal = -1; + int notDir = 0; + int loop = 0; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + if (mode & ~(0777)) { + yaffsfs_SetError(-EINVAL); + return -1; + } + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); + obj = yaffsfs_FollowLink(obj, 0, &loop); + + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) + yaffsfs_SetError(-ENOENT); + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); else - { - yaffsfs_SetError(-ENOSPC); // just assume no space for now - retVal = -1; + retVal = yaffsfs_DoChMod(obj, mode); + + yaffsfs_Unlock(); + + return retVal; + +} + +int yaffs_fchmod(int fd, mode_t mode) +{ + struct yaffs_obj *obj; + int retVal = -1; + + if (mode & ~(0777)) { + yaffsfs_SetError(-EINVAL); + return -1; } + yaffsfs_Lock(); + obj = yaffsfs_HandleToObject(fd); + + if (!obj) + yaffsfs_SetError(-EBADF); + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else + retVal = yaffsfs_DoChMod(obj, mode); + yaffsfs_Unlock(); return retVal; } -int yaffs_mount(const char *path) +int yaffs_mkdir(const YCHAR *path, mode_t mode) { - int retVal=-1; - int result=YAFFS_FAIL; - yaffs_Device *dev=NULL; - char *dummy; + struct yaffs_obj *parent = NULL; + struct yaffs_obj *dir = NULL; + YCHAR *name; + YCHAR *alt_path = NULL; + int retVal = -1; + int notDir = 0; + int loop = 0; - T(YAFFS_TRACE_ALWAYS,("yaffs: Mounting %s\n",path)); + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + if (yaffsfs_alt_dir_path(path, &alt_path) < 0) { + yaffsfs_SetError(-ENOMEM); + return -1; + } + if (alt_path) + path = alt_path; yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path,&dummy); - if(dev) - { - if(!dev->isMounted) - { - result = yaffs_GutsInitialise(dev); - if(result == YAFFS_FAIL) - { - // todo error - mount failed - yaffsfs_SetError(-ENOMEM); + parent = yaffsfs_FindDirectory(NULL, path, &name, 0, ¬Dir, &loop); + if (!parent && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!parent) + yaffsfs_SetError(-ENOENT); + else if (yaffsfs_TooManyObjects(parent->my_dev)) + yaffsfs_SetError(-ENFILE); + else if (yaffs_strnlen(name, 5) == 0) { + /* Trying to make the root itself */ + yaffsfs_SetError(-EEXIST); + } else if (parent->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else { + dir = yaffs_create_dir(parent, name, mode, 0, 0); + if (dir) + retVal = 0; + else if (yaffs_find_by_name(parent, name)) + yaffsfs_SetError(-EEXIST); /* name exists */ + else + yaffsfs_SetError(-ENOSPC); /* assume no space */ + } + + yaffsfs_Unlock(); + + kfree(alt_path); + + return retVal; +} + +int yaffs_rmdir(const YCHAR *path) +{ + int result; + YCHAR *alt_path; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + if (yaffsfs_alt_dir_path(path, &alt_path) < 0) { + yaffsfs_SetError(-ENOMEM); + return -1; + } + if (alt_path) + path = alt_path; + result = yaffsfs_DoUnlink(path, 1); + + kfree(alt_path); + + return result; +} + +void *yaffs_getdev(const YCHAR *path) +{ + struct yaffs_dev *dev = NULL; + YCHAR *dummy; + dev = yaffsfs_FindDevice(path, &dummy); + return (void *)dev; +} + +int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt) +{ + int retVal = -1; + int result = YAFFS_FAIL; + struct yaffs_dev *dev = NULL; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + yaffs_trace(YAFFS_TRACE_MOUNT, "yaffs: Mounting %s", path); + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + yaffsfs_Lock(); + + yaffsfs_InitHandles(); + + dev = yaffsfs_FindMountPoint(path); + if (dev) { + if (!dev->is_mounted) { + dev->read_only = read_only ? 1 : 0; + if (skip_checkpt) { + u8 skip = dev->param.skip_checkpt_rd; + dev->param.skip_checkpt_rd = 1; + result = yaffs_guts_initialise(dev); + dev->param.skip_checkpt_rd = skip; + } else { + result = yaffs_guts_initialise(dev); } + + if (result == YAFFS_FAIL) + yaffsfs_SetError(-ENOMEM); retVal = result ? 0 : -1; - } - else - { - //todo error - already mounted. + } else yaffsfs_SetError(-EBUSY); - } - } - else - { - // todo error - no device + } else yaffsfs_SetError(-ENODEV); - } + yaffsfs_Unlock(); return retVal; } -int yaffs_unmount(const char *path) +int yaffs_mount2(const YCHAR *path, int readonly) { - int retVal=-1; - yaffs_Device *dev=NULL; - char *dummy; + return yaffs_mount_common(path, readonly, 0); +} + +int yaffs_mount(const YCHAR *path) +{ + return yaffs_mount_common(path, 0, 0); +} + +int yaffs_sync(const YCHAR *path) +{ + int retVal = -1; + struct yaffs_dev *dev = NULL; + YCHAR *dummy; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path,&dummy); - if(dev) - { - if(dev->isMounted) - { - int i; - int inUse; + dev = yaffsfs_FindDevice(path, &dummy); + if (dev) { + if (!dev->is_mounted) + yaffsfs_SetError(-EINVAL); + else if (dev->read_only) + yaffsfs_SetError(-EROFS); + else { - yaffs_FlushEntireDeviceCache(dev); - yaffs_CheckpointSave(dev); + yaffs_flush_whole_cache(dev); + yaffs_checkpoint_save(dev); + retVal = 0; - for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++) - { - if(yaffsfs_handle[i].inUse && yaffsfs_handle[i].obj->myDev == dev) - { - inUse = 1; // the device is in use, can't unmount - } - } + } + } else + yaffsfs_SetError(-ENODEV); - if(!inUse) - { - yaffs_Deinitialise(dev); + yaffsfs_Unlock(); + return retVal; +} + +static int yaffsfs_IsDevBusy(struct yaffs_dev *dev) +{ + int i; + struct yaffs_obj *obj; + for (i = 0; i < YAFFSFS_N_HANDLES; i++) { + obj = yaffsfs_HandleToObject(i); + if (obj && obj->my_dev == dev) + return 1; + } + return 0; +} + +int yaffs_remount(const YCHAR *path, int force, int read_only) +{ + int retVal = -1; + struct yaffs_dev *dev = NULL; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + yaffsfs_Lock(); + dev = yaffsfs_FindMountPoint(path); + if (dev) { + if (dev->is_mounted) { + yaffs_flush_whole_cache(dev); + + if (force || !yaffsfs_IsDevBusy(dev)) { + if (read_only) + yaffs_checkpoint_save(dev); + dev->read_only = read_only ? 1 : 0; retVal = 0; - } - else - { - // todo error can't unmount as files are open + } else yaffsfs_SetError(-EBUSY); - } - } - else - { - //todo error - not mounted. + } else yaffsfs_SetError(-EINVAL); - } - } - else - { - // todo error - no device + } else yaffsfs_SetError(-ENODEV); - } + yaffsfs_Unlock(); return retVal; } -loff_t yaffs_freespace(const char *path) +int yaffs_unmount2(const YCHAR *path, int force) { - loff_t retVal=-1; - yaffs_Device *dev=NULL; - char *dummy; + int retVal = -1; + struct yaffs_dev *dev = NULL; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path,&dummy); - if(dev && dev->isMounted) - { - retVal = yaffs_GetNumberOfFreeChunks(dev); - retVal *= dev->nDataBytesPerChunk; + dev = yaffsfs_FindMountPoint(path); + if (dev) { + if (dev->is_mounted) { + int inUse; + yaffs_flush_whole_cache(dev); + yaffs_checkpoint_save(dev); + inUse = yaffsfs_IsDevBusy(dev); + if (!inUse || force) { + if (inUse) + yaffsfs_BreakDeviceHandles(dev); + yaffs_deinitialise(dev); + + retVal = 0; + } else + yaffsfs_SetError(-EBUSY); + + } else + yaffsfs_SetError(-EINVAL); + + } else + yaffsfs_SetError(-ENODEV); + + yaffsfs_Unlock(); + return retVal; + +} + +int yaffs_unmount(const YCHAR *path) +{ + return yaffs_unmount2(path, 0); +} + +loff_t yaffs_freespace(const YCHAR *path) +{ + loff_t retVal = -1; + struct yaffs_dev *dev = NULL; + YCHAR *dummy; + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; } - else - { - yaffsfs_SetError(-EINVAL); + + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; } + yaffsfs_Lock(); + dev = yaffsfs_FindDevice(path, &dummy); + if (dev && dev->is_mounted) { + retVal = yaffs_get_n_free_chunks(dev); + retVal *= dev->data_bytes_per_chunk; + + } else + yaffsfs_SetError(-EINVAL); + yaffsfs_Unlock(); return retVal; } +loff_t yaffs_totalspace(const YCHAR *path) +{ + loff_t retVal = -1; + struct yaffs_dev *dev = NULL; + YCHAR *dummy; + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } -void yaffs_initialise(yaffsfs_DeviceConfiguration *cfgList) -{ + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } - yaffsfs_DeviceConfiguration *cfg; + yaffsfs_Lock(); + dev = yaffsfs_FindDevice(path, &dummy); + if (dev && dev->is_mounted) { + retVal = (dev->param.end_block - dev->param.start_block + 1) - + dev->param.n_reserved_blocks; + retVal *= dev->param.chunks_per_block; + retVal *= dev->data_bytes_per_chunk; + + } else + yaffsfs_SetError(-EINVAL); + + yaffsfs_Unlock(); + return retVal; +} - yaffsfs_configurationList = cfgList; +int yaffs_inodecount(const YCHAR *path) +{ + loff_t retVal = -1; + struct yaffs_dev *dev = NULL; + YCHAR *dummy; - yaffsfs_InitHandles(); + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } - cfg = yaffsfs_configurationList; + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } - while(cfg && cfg->prefix && cfg->dev) - { - cfg->dev->isMounted = 0; - cfg->dev->removeObjectCallback = yaffsfs_RemoveObjectCallback; - cfg++; + yaffsfs_Lock(); + dev = yaffsfs_FindDevice(path, &dummy); + if (dev && dev->is_mounted) { + int n_obj = dev->n_obj; + if (n_obj > dev->n_hardlinks) + retVal = n_obj - dev->n_hardlinks; } + + if (retVal < 0) + yaffsfs_SetError(-EINVAL); + + yaffsfs_Unlock(); + return retVal; } +void yaffs_add_device(struct yaffs_dev *dev) +{ + struct list_head *cfg; + /* First check that the device is not in the list. */ + + list_for_each(cfg, &yaffsfs_deviceList) { + if (dev == list_entry(cfg, struct yaffs_dev, dev_list)) + return; + } + + dev->is_mounted = 0; + dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback; -// -// Directory search stuff. + if (!dev->dev_list.next) + INIT_LIST_HEAD(&dev->dev_list); -// -// Directory search context -// -// NB this is an opaque structure. + list_add(&dev->dev_list, &yaffsfs_deviceList); +} + +void yaffs_remove_device(struct yaffs_dev *dev) +{ + list_del_init(&dev->dev_list); +} +/* Functions to iterate through devices. NB Use with extreme care! */ -typedef struct +static struct list_head *dev_iterator; +void yaffs_dev_rewind(void) { - __u32 magic; - yaffs_dirent de; /* directory entry being used by this dsc */ - char name[NAME_MAX+1]; /* name of directory being searched */ - yaffs_Object *dirObj; /* ptr to directory being searched */ - yaffs_Object *nextReturn; /* obj to be returned by next readddir */ - int offset; - struct list_head others; -} yaffsfs_DirectorySearchContext; + dev_iterator = yaffsfs_deviceList.next; +} + +struct yaffs_dev *yaffs_next_dev(void) +{ + struct yaffs_dev *retval; + if (!dev_iterator) + return NULL; + if (dev_iterator == &yaffsfs_deviceList) + return NULL; + + retval = list_entry(dev_iterator, struct yaffs_dev, dev_list); + dev_iterator = dev_iterator->next; + return retval; +} +/* Directory search stuff. */ static struct list_head search_contexts; - -static void yaffsfs_SetDirRewound(yaffsfs_DirectorySearchContext *dsc) +static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContxt *dsc) { - if(dsc && - dsc->dirObj && - dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){ + if (dsc && + dsc->dirObj && + dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - dsc->offset = 0; + dsc->offset = 0; - if( list_empty(&dsc->dirObj->variant.directoryVariant.children)){ - dsc->nextReturn = NULL; - } else { - dsc->nextReturn = list_entry(dsc->dirObj->variant.directoryVariant.children.next, - yaffs_Object,siblings); - } + if (list_empty(&dsc->dirObj->variant.dir_variant.children)) + dsc->nextReturn = NULL; + else + dsc->nextReturn = + list_entry(dsc->dirObj->variant.dir_variant. + children.next, struct yaffs_obj, + siblings); } else { /* Hey someone isn't playing nice! */ } } -static void yaffsfs_DirAdvance(yaffsfs_DirectorySearchContext *dsc) +static void yaffsfs_DirAdvance(struct yaffsfs_DirSearchContxt *dsc) { - if(dsc && - dsc->dirObj && - dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){ - - if( dsc->nextReturn == NULL || - list_empty(&dsc->dirObj->variant.directoryVariant.children)){ - dsc->nextReturn = NULL; - } else { - struct list_head *next = dsc->nextReturn->siblings.next; - - if( next == &dsc->dirObj->variant.directoryVariant.children) - dsc->nextReturn = NULL; /* end of list */ - else - dsc->nextReturn = list_entry(next,yaffs_Object,siblings); - } + if (dsc && + dsc->dirObj && + dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { + + if (dsc->nextReturn == NULL || + list_empty(&dsc->dirObj->variant.dir_variant.children)) + dsc->nextReturn = NULL; + else { + struct list_head *next = dsc->nextReturn->siblings.next; + + if (next == &dsc->dirObj->variant.dir_variant.children) + dsc->nextReturn = NULL; /* end of list */ + else + dsc->nextReturn = list_entry(next, + struct yaffs_obj, + siblings); + } } else { /* Hey someone isn't playing nice! */ } } -static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj) +static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj) { struct list_head *i; - yaffsfs_DirectorySearchContext *dsc; + struct yaffsfs_DirSearchContxt *dsc; /* if search contexts not initilised then skip */ - if(!search_contexts.next) + if (!search_contexts.next) return; - /* Iteratethrough the directory search contexts. + /* Iterate through the directory search contexts. * If any are the one being removed, then advance the dsc to * the next one to prevent a hanging ptr. */ - list_for_each(i, &search_contexts) { + list_for_each(i, &search_contexts) { if (i) { - dsc = list_entry(i, yaffsfs_DirectorySearchContext,others); - if(dsc->nextReturn == obj) + dsc = list_entry(i, struct yaffsfs_DirSearchContxt, + others); + if (dsc->nextReturn == obj) yaffsfs_DirAdvance(dsc); } } } -yaffs_DIR *yaffs_opendir(const char *dirname) +yaffs_DIR *yaffs_opendir(const YCHAR *dirname) { yaffs_DIR *dir = NULL; - yaffs_Object *obj = NULL; - yaffsfs_DirectorySearchContext *dsc = NULL; + struct yaffs_obj *obj = NULL; + struct yaffsfs_DirSearchContxt *dsc = NULL; + int notDir = 0; + int loop = 0; + + if (!dirname) { + yaffsfs_SetError(-EFAULT); + return NULL; + } + + if (yaffsfs_CheckPath(dirname) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return NULL; + } yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,dirname,0); + obj = yaffsfs_FindObject(NULL, dirname, 0, 1, NULL, ¬Dir, &loop); + + if (!obj && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!obj) + yaffsfs_SetError(-ENOENT); + else if (obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + yaffsfs_SetError(-ENOTDIR); + else { + int i; + + for (i = 0, dsc = NULL; i < YAFFSFS_N_DSC && !dsc; i++) { + if (!yaffsfs_dsc[i].inUse) + dsc = &yaffsfs_dsc[i]; + } - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { + dir = (yaffs_DIR *) dsc; - dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext)); - dir = (yaffs_DIR *)dsc; - if(dsc) - { - memset(dsc,0,sizeof(yaffsfs_DirectorySearchContext)); - dsc->magic = YAFFS_MAGIC; + if (dsc) { + memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContxt)); + dsc->inUse = 1; dsc->dirObj = obj; - strncpy(dsc->name,dirname,NAME_MAX); + yaffs_strncpy(dsc->name, dirname, NAME_MAX); INIT_LIST_HEAD(&dsc->others); - if(!search_contexts.next) + if (!search_contexts.next) INIT_LIST_HEAD(&search_contexts); - list_add(&dsc->others,&search_contexts); - yaffsfs_SetDirRewound(dsc); } + list_add(&dsc->others, &search_contexts); + yaffsfs_SetDirRewound(dsc); + } } @@ -1295,35 +2919,34 @@ yaffs_DIR *yaffs_opendir(const char *dirname) return dir; } -struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) +struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp) { - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; + struct yaffsfs_DirSearchContxt *dsc; struct yaffs_dirent *retVal = NULL; + dsc = (struct yaffsfs_DirSearchContxt *) dirp; yaffsfs_Lock(); - if(dsc && dsc->magic == YAFFS_MAGIC){ + if (dsc && dsc->inUse) { yaffsfs_SetError(0); - if(dsc->nextReturn){ - dsc->de.d_ino = yaffs_GetEquivalentObject(dsc->nextReturn)->objectId; + if (dsc->nextReturn) { + dsc->de.d_ino = + yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id; dsc->de.d_dont_use = (unsigned)dsc->nextReturn; dsc->de.d_off = dsc->offset++; - yaffs_GetObjectName(dsc->nextReturn,dsc->de.d_name,NAME_MAX); - if(strlen(dsc->de.d_name) == 0) - { - // this should not happen! - strcpy(dsc->de.d_name,"zz"); + yaffs_get_obj_name(dsc->nextReturn, + dsc->de.d_name, NAME_MAX); + if (yaffs_strnlen(dsc->de.d_name, NAME_MAX + 1) == 0) { + /* this should not happen! */ + yaffs_strcpy(dsc->de.d_name, _Y("zz")); } dsc->de.d_reclen = sizeof(struct yaffs_dirent); retVal = &dsc->de; yaffsfs_DirAdvance(dsc); } else retVal = NULL; - } - else - { + } else yaffsfs_SetError(-EBADF); - } yaffsfs_Unlock(); @@ -1331,10 +2954,11 @@ struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) } - void yaffs_rewinddir(yaffs_DIR *dirp) { - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; + struct yaffsfs_DirSearchContxt *dsc; + + dsc = (struct yaffsfs_DirSearchContxt *) dirp; yaffsfs_Lock(); @@ -1343,41 +2967,67 @@ void yaffs_rewinddir(yaffs_DIR *dirp) yaffsfs_Unlock(); } - int yaffs_closedir(yaffs_DIR *dirp) { - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; + struct yaffsfs_DirSearchContxt *dsc; + + dsc = (struct yaffsfs_DirSearchContxt *) dirp; + + if (!dsc) { + yaffsfs_SetError(-EFAULT); + return -1; + } yaffsfs_Lock(); - dsc->magic = 0; - list_del(&dsc->others); /* unhook from list */ - YFREE(dsc); + dsc->inUse = 0; + list_del(&dsc->others); /* unhook from list */ yaffsfs_Unlock(); return 0; } -// end of directory stuff - +/* End of directory stuff */ -int yaffs_symlink(const char *oldpath, const char *newpath) +int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath) { - yaffs_Object *parent = NULL; - yaffs_Object *obj; - char *name; - int retVal= -1; - int mode = 0; // ignore for now + struct yaffs_obj *parent = NULL; + struct yaffs_obj *obj; + YCHAR *name; + int retVal = -1; + int mode = 0; /* ignore for now */ + int notDir = 0; + int loop = 0; - yaffsfs_Lock(); - parent = yaffsfs_FindDirectory(NULL,newpath,&name,0); - obj = yaffs_MknodSymLink(parent,name,mode,0,0,oldpath); - if(obj) - { - retVal = 0; + if (!oldpath || !newpath) { + yaffsfs_SetError(-EFAULT); + return -1; } - else - { - yaffsfs_SetError(-ENOSPC); // just assume no space for now - retVal = -1; + + if (yaffsfs_CheckPath(newpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } + + yaffsfs_Lock(); + parent = yaffsfs_FindDirectory(NULL, newpath, &name, 0, ¬Dir, &loop); + if (!parent && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!parent || yaffs_strnlen(name, 5) < 1) + yaffsfs_SetError(-ENOENT); + else if (yaffsfs_TooManyObjects(parent->my_dev)) + yaffsfs_SetError(-ENFILE); + else if (parent->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else if (parent) { + obj = yaffs_create_symlink(parent, name, mode, 0, 0, oldpath); + if (obj) + retVal = 0; + else if (yaffsfs_FindObject + (NULL, newpath, 0, 0, NULL, NULL, NULL)) + yaffsfs_SetError(-EEXIST); + else + yaffsfs_SetError(-ENOSPC); } yaffsfs_Unlock(); @@ -1386,90 +3036,98 @@ int yaffs_symlink(const char *oldpath, const char *newpath) } -int yaffs_readlink(const char *path, char *buf, int bufsiz) +int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz) { - yaffs_Object *obj = NULL; - int retVal; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + int retVal = -1; + int notDir = 0; + int loop = 0; + if (!path || !buf) { + yaffsfs_SetError(-EFAULT); + return -1; + } yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); - if(!obj) - { + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) yaffsfs_SetError(-ENOENT); - retVal = -1; - } - else if(obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK) - { + else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK) yaffsfs_SetError(-EINVAL); - retVal = -1; - } - else - { - char *alias = obj->variant.symLinkVariant.alias; - memset(buf,0,bufsiz); - strncpy(buf,alias,bufsiz - 1); + else { + YCHAR *alias = obj->variant.symlink_variant.alias; + memset(buf, 0, bufsiz); + yaffs_strncpy(buf, alias, bufsiz - 1); retVal = 0; } yaffsfs_Unlock(); return retVal; } -int yaffs_link(const char *oldpath, const char *newpath) +int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath) { - // Creates a link called newpath to existing oldpath - yaffs_Object *obj = NULL; - yaffs_Object *target = NULL; - int retVal = 0; + /* Creates a link called newpath to existing oldpath */ + struct yaffs_obj *obj = NULL; + struct yaffs_obj *lnk = NULL; + struct yaffs_obj *obj_dir = NULL; + struct yaffs_obj *lnk_dir = NULL; + int retVal = -1; + int notDirObj = 0; + int notDirLnk = 0; + int objLoop = 0; + int lnkLoop = 0; + YCHAR *newname; + + if (!oldpath || !linkpath) { + yaffsfs_SetError(-EFAULT); + return -1; + } + if (yaffsfs_CheckPath(linkpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,oldpath,0); - target = yaffsfs_FindObject(NULL,newpath,0); + obj = yaffsfs_FindObject(NULL, oldpath, 0, 1, + &obj_dir, ¬DirObj, &objLoop); + lnk = yaffsfs_FindObject(NULL, linkpath, 0, 0, NULL, NULL, NULL); + lnk_dir = yaffsfs_FindDirectory(NULL, linkpath, &newname, + 0, ¬DirLnk, &lnkLoop); - if(!obj) - { + if ((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk)) + yaffsfs_SetError(-ENOTDIR); + else if (objLoop || lnkLoop) + yaffsfs_SetError(-ELOOP); + else if (!obj_dir || !lnk_dir || !obj) yaffsfs_SetError(-ENOENT); - retVal = -1; - } - else if(target) - { + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else if (yaffsfs_TooManyObjects(obj->my_dev)) + yaffsfs_SetError(-ENFILE); + else if (lnk) yaffsfs_SetError(-EEXIST); - retVal = -1; - } - else - { - yaffs_Object *newdir = NULL; - yaffs_Object *link = NULL; - - char *newname; - - newdir = yaffsfs_FindDirectory(NULL,newpath,&newname,0); + else if (lnk_dir->my_dev != obj->my_dev) + yaffsfs_SetError(-EXDEV); + else { + retVal = yaffsfs_CheckNameLength(newname); - if(!newdir) - { - yaffsfs_SetError(-ENOTDIR); - retVal = -1; - } - else if(newdir->myDev != obj->myDev) - { - yaffsfs_SetError(-EXDEV); - retVal = -1; - } - if(newdir && strlen(newname) > 0) - { - link = yaffs_Link(newdir,newname,obj); - if(link) + if (retVal == 0) { + lnk = yaffs_link_obj(lnk_dir, newname, obj); + if (lnk) retVal = 0; - else - { + else { yaffsfs_SetError(-ENOSPC); retVal = -1; } - } } yaffsfs_Unlock(); @@ -1477,34 +3135,84 @@ int yaffs_link(const char *oldpath, const char *newpath) return retVal; } -int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev); +int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev) +{ + pathname = pathname; + mode = mode; + dev = dev; + + yaffsfs_SetError(-EINVAL); + return -1; +} + +/* + * D E B U G F U N C T I O N S + */ -int yaffs_DumpDevStruct(const char *path) +/* + * yaffs_n_handles() + * Returns number of handles attached to the object + */ +int yaffs_n_handles(const YCHAR *path) { - char *rest; + struct yaffs_obj *obj; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } - yaffs_Object *obj = yaffsfs_FindRoot(path,&rest); + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } - if(obj) - { - yaffs_Device *dev = obj->myDev; + obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL); + + if (obj) + return yaffsfs_CountHandles(obj); + else + return -1; +} + +int yaffs_get_error(void) +{ + return yaffsfs_GetLastError(); +} + +int yaffs_set_error(int error) +{ + yaffsfs_SetError(error); + return 0; +} + +int yaffs_dump_dev(const YCHAR *path) +{ +#if 1 + path = path; +#else + YCHAR *rest; + + struct yaffs_obj *obj = yaffsfs_FindRoot(path, &rest); + + if (obj) { + struct yaffs_dev *dev = obj->my_dev; printf("\n" - "nPageWrites.......... %d\n" - "nPageReads........... %d\n" - "nBlockErasures....... %d\n" - "nGCCopies............ %d\n" - "garbageCollections... %d\n" - "passiveGarbageColl'ns %d\n" - "\n", - dev->nPageWrites, - dev->nPageReads, - dev->nBlockErasures, - dev->nGCCopies, - dev->garbageCollections, - dev->passiveGarbageCollections - ); + "n_page_writes.......... %d\n" + "n_page_reads........... %d\n" + "n_erasures....... %d\n" + "n_gc_copies............ %d\n" + "garbageCollections... %d\n" + "passiveGarbageColl'ns %d\n" + "\n", + dev->n_page_writes, + dev->n_page_reads, + dev->n_erasures, + dev->n_gc_copies, + dev->garbageCollections, dev->passiveGarbageCollections); } +#endif return 0; } diff --git a/fs/yaffs2/yaffsfs.h b/fs/yaffs2/yaffsfs.h index 95e7a91..f2c7666 100644 --- a/fs/yaffs2/yaffsfs.h +++ b/fs/yaffs2/yaffsfs.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -26,206 +26,184 @@ #include "yportenv.h" -//typedef long off_t; -//typedef long dev_t; -//typedef unsigned long mode_t; - - #ifndef NAME_MAX #define NAME_MAX 256 #endif -#ifndef O_RDONLY -#define O_RDONLY 00 -#endif - -#ifndef O_WRONLY -#define O_WRONLY 01 -#endif - -#ifndef O_RDWR -#define O_RDWR 02 -#endif +#define YAFFS_MAX_FILE_SIZE (0x800000000LL - 1) -#ifndef O_CREAT -#define O_CREAT 0100 -#endif -#ifndef O_EXCL -#define O_EXCL 0200 -#endif - -#ifndef O_TRUNC -#define O_TRUNC 01000 -#endif +struct yaffs_dirent { + long d_ino; /* inode number */ + off_t d_off; /* offset to this dirent */ + unsigned short d_reclen; /* length of this dirent */ + YUCHAR d_type; /* type of this record */ + YCHAR d_name[NAME_MAX+1]; /* file name (null-terminated) */ + unsigned d_dont_use; /* debug: not for public consumption */ +}; -#ifndef O_APPEND -#define O_APPEND 02000 +typedef struct opaque_structure yaffs_DIR; + + + +struct yaffs_stat { + int st_dev; /* device */ + int st_ino; /* inode */ + unsigned st_mode; /* protection */ + int st_nlink; /* number of hard links */ + int st_uid; /* user ID of owner */ + int st_gid; /* group ID of owner */ + unsigned st_rdev; /* device type (if inode device) */ + loff_t st_size; /* total size, in bytes */ + unsigned long st_blksize; /* blocksize for filesystem I/O */ + unsigned long st_blocks; /* number of blocks allocated */ +#ifdef CONFIG_YAFFS_WINCE + /* Special 64-bit times for WinCE */ + unsigned long yst_wince_atime[2]; + unsigned long yst_wince_mtime[2]; + unsigned long yst_wince_ctime[2]; +#else + unsigned long yst_atime; /* time of last access */ + unsigned long yst_mtime; /* time of last modification */ + unsigned long yst_ctime; /* time of last change */ #endif +}; -#ifndef SEEK_SET -#define SEEK_SET 0 -#endif -#ifndef SEEK_CUR -#define SEEK_CUR 1 -#endif +struct yaffs_utimbuf { + unsigned long actime; + unsigned long modtime; +}; -#ifndef SEEK_END -#define SEEK_END 2 -#endif -#ifndef EBUSY -#define EBUSY 16 -#endif +int yaffs_open(const YCHAR *path, int oflag, int mode) ; -#ifndef ENODEV -#define ENODEV 19 -#endif - -#ifndef EINVAL -#define EINVAL 22 -#endif +int yaffs_close(int fd) ; +int yaffs_fsync(int fd) ; +int yaffs_fdatasync(int fd) ; +int yaffs_flush(int fd) ; /* same as yaffs_fsync() */ -#ifndef EBADF -#define EBADF 9 -#endif +int yaffs_access(const YCHAR *path, int amode); -#ifndef EACCESS -#define EACCESS 13 -#endif +int yaffs_dup(int fd); -#ifndef EXDEV -#define EXDEV 18 -#endif +int yaffs_read(int fd, void *buf, unsigned int nbyte) ; +int yaffs_write(int fd, const void *buf, unsigned int nbyte) ; -#ifndef ENOENT -#define ENOENT 2 -#endif +int yaffs_pread(int fd, void *buf, unsigned int nbyte, loff_t offset); +int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, loff_t offset); -#ifndef ENOSPC -#define ENOSPC 28 -#endif +loff_t yaffs_lseek(int fd, loff_t offset, int whence) ; -#ifndef ENOTEMPTY -#define ENOTEMPTY 39 -#endif +int yaffs_truncate(const YCHAR *path, loff_t new_size); +int yaffs_ftruncate(int fd, loff_t new_size); -#ifndef ENOMEM -#define ENOMEM 12 -#endif +int yaffs_unlink(const YCHAR *path) ; +int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath) ; -#ifndef EEXIST -#define EEXIST 17 -#endif +int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf) ; +int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf) ; +int yaffs_fstat(int fd, struct yaffs_stat *buf) ; -#ifndef ENOTDIR -#define ENOTDIR 20 -#endif +int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf); +int yaffs_futime(int fd, const struct yaffs_utimbuf *buf); -#ifndef EISDIR -#define EISDIR 21 -#endif +int yaffs_setxattr(const char *path, const char *name, + const void *data, int size, int flags); +int yaffs_lsetxattr(const char *path, const char *name, + const void *data, int size, int flags); +int yaffs_fsetxattr(int fd, const char *name, + const void *data, int size, int flags); -// Mode flags +int yaffs_getxattr(const char *path, const char *name, + void *data, int size); +int yaffs_lgetxattr(const char *path, const char *name, + void *data, int size); +int yaffs_fgetxattr(int fd, const char *name, + void *data, int size); -#ifndef S_IFMT -#define S_IFMT 0170000 -#endif +int yaffs_removexattr(const char *path, const char *name); +int yaffs_lremovexattr(const char *path, const char *name); +int yaffs_fremovexattr(int fd, const char *name); -#ifndef S_IFLNK -#define S_IFLNK 0120000 -#endif +int yaffs_listxattr(const char *path, char *list, int size); +int yaffs_llistxattr(const char *path, char *list, int size); +int yaffs_flistxattr(int fd, char *list, int size); -#ifndef S_IFDIR -#define S_IFDIR 0040000 -#endif -#ifndef S_IFREG -#define S_IFREG 0100000 -#endif +#ifdef CONFIG_YAFFS_WINCE -#ifndef S_IREAD -#define S_IREAD 0000400 -#endif +int yaffs_set_wince_times(int fd, + const unsigned *wctime, + const unsigned *watime, + const unsigned *wmtime); +int yaffs_get_wince_times(int fd, + unsigned *wctime, + unsigned *watime, + unsigned *wmtime); -#ifndef S_IWRITE -#define S_IWRITE 0000200 #endif +int yaffs_chmod(const YCHAR *path, mode_t mode); +int yaffs_fchmod(int fd, mode_t mode); +int yaffs_mkdir(const YCHAR *path, mode_t mode) ; +int yaffs_rmdir(const YCHAR *path) ; +yaffs_DIR *yaffs_opendir(const YCHAR *dirname) ; +struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) ; +void yaffs_rewinddir(yaffs_DIR *dirp) ; +int yaffs_closedir(yaffs_DIR *dirp) ; -struct yaffs_dirent{ - long d_ino; /* inode number */ - off_t d_off; /* offset to this dirent */ - unsigned short d_reclen; /* length of this d_name */ - char d_name [NAME_MAX+1]; /* file name (null-terminated) */ - unsigned d_dont_use; /* debug pointer, not for public consumption */ -}; - -typedef struct yaffs_dirent yaffs_dirent; - - -typedef struct __opaque yaffs_DIR; - +int yaffs_mount(const YCHAR *path) ; +int yaffs_mount2(const YCHAR *path, int read_only); +int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt); +int yaffs_unmount(const YCHAR *path) ; +int yaffs_unmount2(const YCHAR *path, int force); +int yaffs_remount(const YCHAR *path, int force, int read_only); -struct yaffs_stat{ - int st_dev; /* device */ - int st_ino; /* inode */ - mode_t st_mode; /* protection */ - int st_nlink; /* number of hard links */ - int st_uid; /* user ID of owner */ - int st_gid; /* group ID of owner */ - unsigned st_rdev; /* device type (if inode device) */ - off_t st_size; /* total size, in bytes */ - unsigned long st_blksize; /* blocksize for filesystem I/O */ - unsigned long st_blocks; /* number of blocks allocated */ - unsigned long yst_atime; /* time of last access */ - unsigned long yst_mtime; /* time of last modification */ - unsigned long yst_ctime; /* time of last change */ -}; -int yaffs_open(const char *path, int oflag, int mode) ; -int yaffs_read(int fd, void *buf, unsigned int nbyte) ; -int yaffs_write(int fd, const void *buf, unsigned int nbyte) ; -int yaffs_close(int fd) ; -off_t yaffs_lseek(int fd, off_t offset, int whence) ; -int yaffs_truncate(int fd, off_t newSize); +int yaffs_sync(const YCHAR *path) ; -int yaffs_unlink(const char *path) ; -int yaffs_rename(const char *oldPath, const char *newPath) ; +int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath); +int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz); -int yaffs_stat(const char *path, struct yaffs_stat *buf) ; -int yaffs_lstat(const char *path, struct yaffs_stat *buf) ; -int yaffs_fstat(int fd, struct yaffs_stat *buf) ; +int yaffs_link(const YCHAR *oldpath, const YCHAR *newpath); +int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev); -int yaffs_chmod(const char *path, mode_t mode); -int yaffs_fchmod(int fd, mode_t mode); +loff_t yaffs_freespace(const YCHAR *path); +loff_t yaffs_totalspace(const YCHAR *path); -int yaffs_mkdir(const char *path, mode_t mode) ; -int yaffs_rmdir(const char *path) ; +int yaffs_inodecount(const YCHAR *path); -yaffs_DIR *yaffs_opendir(const char *dirname) ; -struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) ; -void yaffs_rewinddir(yaffs_DIR *dirp) ; -int yaffs_closedir(yaffs_DIR *dirp) ; +int yaffs_n_handles(const YCHAR *path); -int yaffs_mount(const char *path) ; -int yaffs_unmount(const char *path) ; +#define YAFFS_SHARE_READ 1 +#define YAFFS_SHARE_WRITE 2 +int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int shareMode); -int yaffs_symlink(const char *oldpath, const char *newpath); -int yaffs_readlink(const char *path, char *buf, int bufsiz); +struct yaffs_dev; +void yaffs_add_device(struct yaffs_dev *dev); -int yaffs_link(const char *oldpath, const char *newpath); -int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev); +int yaffs_start_up(void); +int yaffsfs_GetLastError(void); -loff_t yaffs_freespace(const char *path); +/* Functions to iterate through devices. NB Use with extreme care! */ +void yaffs_dev_rewind(void); +struct yaffs_dev *yaffs_next_dev(void); -void yaffs_initialise(yaffsfs_DeviceConfiguration *configList); +/* Function to get the last error */ +int yaffs_get_error(void); +const char *yaffs_error_to_str(int err); -int yaffs_StartUp(void); +/* Function only for debugging */ +void *yaffs_getdev(const YCHAR *path); +int yaffs_dump_dev(const YCHAR *path); +int yaffs_set_error(int error); +/* Trace control functions */ +unsigned yaffs_set_trace(unsigned tm); +unsigned yaffs_get_trace(void); #endif diff --git a/fs/yaffs2/ydirectenv.h b/fs/yaffs2/ydirectenv.h index b555810..df0b8fb 100644 --- a/fs/yaffs2/ydirectenv.h +++ b/fs/yaffs2/ydirectenv.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -20,73 +20,75 @@ #ifndef __YDIRECTENV_H__ #define __YDIRECTENV_H__ -/* Direct interface */ - -#include "devextras.h" - -/* XXX U-BOOT XXX */ -#if 0 #include "stdlib.h" #include "stdio.h" #include "string.h" -#include "assert.h" -#endif -#include "yaffs_malloc.h" +#include "yaffs_osglue.h" +#include "yaffs_hweight.h" + +void yaffs_bug_fn(const char *file_name, int line_no); + +#define BUG() do { yaffs_bug_fn(__FILE__, __LINE__); } while (0) -/* XXX U-BOOT XXX */ -#if 0 -#define YBUG() assert(1) -#endif #define YCHAR char #define YUCHAR unsigned char #define _Y(x) x -#define yaffs_strcpy(a,b) strcpy(a,b) -#define yaffs_strncpy(a,b,c) strncpy(a,b,c) -#define yaffs_strncmp(a,b,c) strncmp(a,b,c) -#define yaffs_strlen(s) strlen(s) -#define yaffs_sprintf sprintf -#define yaffs_toupper(a) toupper(a) - -#ifdef NO_Y_INLINE -#define Y_INLINE + +#define yaffs_strcat(a, b) strcat(a, b) +#define yaffs_strcpy(a, b) strcpy(a, b) +#define yaffs_strncpy(a, b, c) strncpy(a, b, c) +#define yaffs_strnlen(s, m) strnlen(s, m) +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE +#define yaffs_strcmp(a, b) strcasecmp(a, b) +#define yaffs_strncmp(a, b, c) strncasecmp(a, b, c) #else -#define Y_INLINE inline +#define yaffs_strcmp(a, b) strcmp(a, b) +#define yaffs_strncmp(a, b, c) strncmp(a, b, c) #endif -#define YMALLOC(x) yaffs_malloc(x) -#define YFREE(x) free(x) -#define YMALLOC_ALT(x) yaffs_malloc(x) -#define YFREE_ALT(x) free(x) +#define hweight8(x) yaffs_hweight8(x) +#define hweight32(x) yaffs_hweight32(x) -#define YMALLOC_DMA(x) yaffs_malloc(x) +void yaffs_qsort(void *aa, size_t n, size_t es, + int (*cmp)(const void *, const void *)); -#define YYIELD() do {} while(0) +#define sort(base, n, sz, cmp_fn, swp) yaffs_qsort(base, n, sz, cmp_fn) +#define YAFFS_PATH_DIVIDERS "/" +#ifdef NO_inline +#define inline +#else +#define inline __inline__ +#endif -//#define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s)) -//#define YALERT(s) YINFO(s) +#define kmalloc(x, flags) yaffsfs_malloc(x) +#define kfree(x) yaffsfs_free(x) +#define vmalloc(x) yaffsfs_malloc(x) +#define vfree(x) yaffsfs_free(x) +#define cond_resched() do {} while (0) -#define TENDSTR "\n" -#define TSTR(x) x -#define TOUT(p) printf p +#define yaffs_trace(msk, fmt, ...) do { \ + if (yaffs_trace_mask & (msk)) \ + printf("yaffs: " fmt "\n", ##__VA_ARGS__); \ +} while (0) #define YAFFS_LOSTNFOUND_NAME "lost+found" #define YAFFS_LOSTNFOUND_PREFIX "obj" -//#define YPRINTF(x) printf x #include "yaffscfg.h" #define Y_CURRENT_TIME yaffsfs_CurrentTime() #define Y_TIME_CONVERT(x) x -#define YAFFS_ROOT_MODE 0666 +#define YAFFS_ROOT_MODE 0666 #define YAFFS_LOSTNFOUND_MODE 0666 -#define yaffs_SumCompare(x,y) ((x) == (y)) -#define yaffs_strcmp(a,b) strcmp(a,b) +#include "yaffs_list.h" + +#include "yaffsfs.h" #endif diff --git a/fs/yaffs2/yportenv.h b/fs/yaffs2/yportenv.h index bbab14d..b47a4d6 100644 --- a/fs/yaffs2/yportenv.h +++ b/fs/yaffs2/yportenv.h @@ -1,7 +1,7 @@ /* * YAFFS: Yet another Flash File System . A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -17,82 +17,62 @@ #ifndef __YPORTENV_H__ #define __YPORTENV_H__ -/* XXX U-BOOT XXX */ -#ifndef CONFIG_YAFFS_DIRECT -#define CONFIG_YAFFS_DIRECT + +/* Definition of types */ +#ifdef CONFIG_YAFFS_DEFINES_TYPES +typedef unsigned char u8; +typedef unsigned short u16; +typedef unsigned u32; #endif -#if defined CONFIG_YAFFS_WINCE -#include "ywinceenv.h" +#ifdef CONFIG_YAFFS_PROVIDE_DEFS +/* File types */ + + +#define DT_UNKNOWN 0 +#define DT_FIFO 1 +#define DT_CHR 2 +#define DT_DIR 4 +#define DT_BLK 6 +#define DT_REG 8 +#define DT_LNK 10 +#define DT_SOCK 12 +#define DT_WHT 14 + + +/* + * Attribute flags. + * These are or-ed together to select what has been changed. + */ +#define ATTR_MODE 1 +#define ATTR_UID 2 +#define ATTR_GID 4 +#define ATTR_SIZE 8 +#define ATTR_ATIME 16 +#define ATTR_MTIME 32 +#define ATTR_CTIME 64 + +struct iattr { + unsigned int ia_valid; + unsigned ia_mode; + unsigned ia_uid; + unsigned ia_gid; + unsigned ia_size; + unsigned ia_atime; + unsigned ia_mtime; + unsigned ia_ctime; + unsigned int ia_attr_flags; +}; -/* XXX U-BOOT XXX */ -#elif 0 /* defined __KERNEL__ */ - -#include "moduleconfig.h" - -/* Linux kernel */ -#include <linux/version.h> -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) -#include <linux/config.h> -#endif -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> - -#define YCHAR char -#define YUCHAR unsigned char -#define _Y(x) x -#define yaffs_strcpy(a,b) strcpy(a,b) -#define yaffs_strncpy(a,b,c) strncpy(a,b,c) -#define yaffs_strncmp(a,b,c) strncmp(a,b,c) -#define yaffs_strlen(s) strlen(s) -#define yaffs_sprintf sprintf -#define yaffs_toupper(a) toupper(a) - -#define Y_INLINE inline - -#define YAFFS_LOSTNFOUND_NAME "lost+found" -#define YAFFS_LOSTNFOUND_PREFIX "obj" - -/* #define YPRINTF(x) printk x */ -#define YMALLOC(x) kmalloc(x,GFP_KERNEL) -#define YFREE(x) kfree(x) -#define YMALLOC_ALT(x) vmalloc(x) -#define YFREE_ALT(x) vfree(x) -#define YMALLOC_DMA(x) YMALLOC(x) - -// KR - added for use in scan so processes aren't blocked indefinitely. -#define YYIELD() schedule() - -#define YAFFS_ROOT_MODE 0666 -#define YAFFS_LOSTNFOUND_MODE 0666 - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -#define Y_CURRENT_TIME CURRENT_TIME.tv_sec -#define Y_TIME_CONVERT(x) (x).tv_sec -#else -#define Y_CURRENT_TIME CURRENT_TIME -#define Y_TIME_CONVERT(x) (x) #endif -#define yaffs_SumCompare(x,y) ((x) == (y)) -#define yaffs_strcmp(a,b) strcmp(a,b) -#define TENDSTR "\n" -#define TSTR(x) KERN_WARNING x -#define TOUT(p) printk p -#define yaffs_trace(mask, fmt, args...) \ - do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \ - printk(KERN_WARNING "yaffs: " fmt, ## args); \ - } while (0) +#if defined CONFIG_YAFFS_WINCE + +#include "ywinceenv.h" -#define compile_time_assertion(assertion) \ - ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; }) #elif defined CONFIG_YAFFS_DIRECT @@ -101,93 +81,228 @@ #elif defined CONFIG_YAFFS_UTIL -/* Stuff for YAFFS utilities */ +#include "yutilsenv.h" -#include "stdlib.h" -#include "stdio.h" -#include "string.h" +#else +/* Should have specified a configuration type */ +#error Unknown configuration -#include "devextras.h" +#endif -#define YMALLOC(x) malloc(x) -#define YFREE(x) free(x) -#define YMALLOC_ALT(x) malloc(x) -#define YFREE_ALT(x) free(x) +#if defined(CONFIG_YAFFS_DIRECT) || defined(CONFIG_YAFFS_WINCE) -#define YCHAR char -#define YUCHAR unsigned char -#define _Y(x) x -#define yaffs_strcpy(a,b) strcpy(a,b) -#define yaffs_strncpy(a,b,c) strncpy(a,b,c) -#define yaffs_strlen(s) strlen(s) -#define yaffs_sprintf sprintf -#define yaffs_toupper(a) toupper(a) +#ifdef CONFIG_YAFFSFS_PROVIDE_VALUES -#define Y_INLINE inline +#ifndef O_RDONLY +#define O_RDONLY 00 +#endif -/* #define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s)) */ -/* #define YALERT(s) YINFO(s) */ +#ifndef O_WRONLY +#define O_WRONLY 01 +#endif -#define TENDSTR "\n" -#define TSTR(x) x -#define TOUT(p) printf p +#ifndef O_RDWR +#define O_RDWR 02 +#endif -#define YAFFS_LOSTNFOUND_NAME "lost+found" -#define YAFFS_LOSTNFOUND_PREFIX "obj" -/* #define YPRINTF(x) printf x */ +#ifndef O_CREAT +#define O_CREAT 0100 +#endif -#define YAFFS_ROOT_MODE 0666 -#define YAFFS_LOSTNFOUND_MODE 0666 +#ifndef O_EXCL +#define O_EXCL 0200 +#endif -#define yaffs_SumCompare(x,y) ((x) == (y)) -#define yaffs_strcmp(a,b) strcmp(a,b) +#ifndef O_TRUNC +#define O_TRUNC 01000 +#endif -#else -/* Should have specified a configuration type */ -#error Unknown configuration +#ifndef O_APPEND +#define O_APPEND 02000 +#endif +#ifndef SEEK_SET +#define SEEK_SET 0 #endif -/* see yaffs_fs.c */ -extern unsigned int yaffs_traceMask; -extern unsigned int yaffs_wr_attempts; +#ifndef SEEK_CUR +#define SEEK_CUR 1 +#endif -/* - * Tracing flags. - * The flags masked in YAFFS_TRACE_ALWAYS are always traced. - */ +#ifndef SEEK_END +#define SEEK_END 2 +#endif + +#ifndef EBUSY +#define EBUSY 16 +#endif + +#ifndef ENODEV +#define ENODEV 19 +#endif + +#ifndef EINVAL +#define EINVAL 22 +#endif + +#ifndef ENFILE +#define ENFILE 23 +#endif + +#ifndef EBADF +#define EBADF 9 +#endif + +#ifndef EACCES +#define EACCES 13 +#endif + +#ifndef EXDEV +#define EXDEV 18 +#endif + +#ifndef ENOENT +#define ENOENT 2 +#endif + +#ifndef ENOSPC +#define ENOSPC 28 +#endif + +#ifndef EROFS +#define EROFS 30 +#endif + +#ifndef ERANGE +#define ERANGE 34 +#endif + +#ifndef ENODATA +#define ENODATA 61 +#endif + +#ifndef ENOTEMPTY +#define ENOTEMPTY 39 +#endif + +#ifndef ENAMETOOLONG +#define ENAMETOOLONG 36 +#endif + +#ifndef ENOMEM +#define ENOMEM 12 +#endif + +#ifndef EFAULT +#define EFAULT 14 +#endif + +#ifndef EEXIST +#define EEXIST 17 +#endif + +#ifndef ENOTDIR +#define ENOTDIR 20 +#endif + +#ifndef EISDIR +#define EISDIR 21 +#endif + +#ifndef ELOOP +#define ELOOP 40 +#endif + + +/* Mode flags */ + +#ifndef S_IFMT +#define S_IFMT 0170000 +#endif + +#ifndef S_IFSOCK +#define S_IFSOCK 0140000 +#endif + +#ifndef S_IFIFO +#define S_IFIFO 0010000 +#endif + +#ifndef S_IFCHR +#define S_IFCHR 0020000 +#endif + +#ifndef S_IFBLK +#define S_IFBLK 0060000 +#endif + +#ifndef S_IFLNK +#define S_IFLNK 0120000 +#endif + +#ifndef S_IFDIR +#define S_IFDIR 0040000 +#endif + +#ifndef S_IFREG +#define S_IFREG 0100000 +#endif + +#define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) +#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) +#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) +#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) +#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) +#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) +#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) + + +#ifndef S_IREAD +#define S_IREAD 0000400 +#endif + +#ifndef S_IWRITE +#define S_IWRITE 0000200 +#endif + +#ifndef S_IEXEC +#define S_IEXEC 0000100 +#endif + +#ifndef XATTR_CREATE +#define XATTR_CREATE 1 +#endif + +#ifndef XATTR_REPLACE +#define XATTR_REPLACE 2 +#endif + +#ifndef R_OK +#define R_OK 4 +#define W_OK 2 +#define X_OK 1 +#define F_OK 0 +#endif + +#else +#include <errno.h> +#include <sys/stat.h> +#include <fcntl.h> +#endif + +#endif + +#ifndef Y_DUMP_STACK +#define Y_DUMP_STACK() do { } while (0) +#endif -#define YAFFS_TRACE_OS 0x00000002 -#define YAFFS_TRACE_ALLOCATE 0x00000004 -#define YAFFS_TRACE_SCAN 0x00000008 -#define YAFFS_TRACE_BAD_BLOCKS 0x00000010 -#define YAFFS_TRACE_ERASE 0x00000020 -#define YAFFS_TRACE_GC 0x00000040 -#define YAFFS_TRACE_WRITE 0x00000080 -#define YAFFS_TRACE_TRACING 0x00000100 -#define YAFFS_TRACE_DELETION 0x00000200 -#define YAFFS_TRACE_BUFFERS 0x00000400 -#define YAFFS_TRACE_NANDACCESS 0x00000800 -#define YAFFS_TRACE_GC_DETAIL 0x00001000 -#define YAFFS_TRACE_SCAN_DEBUG 0x00002000 -#define YAFFS_TRACE_MTD 0x00004000 -#define YAFFS_TRACE_CHECKPOINT 0x00008000 - -#define YAFFS_TRACE_VERIFY 0x00010000 -#define YAFFS_TRACE_VERIFY_NAND 0x00020000 -#define YAFFS_TRACE_VERIFY_FULL 0x00040000 -#define YAFFS_TRACE_VERIFY_ALL 0x000F0000 - - -#define YAFFS_TRACE_ERROR 0x40000000 -#define YAFFS_TRACE_BUG 0x80000000 -#define YAFFS_TRACE_ALWAYS 0xF0000000 - - -#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p);} while(0) - -#ifndef CONFIG_YAFFS_WINCE -#define YBUG() T(YAFFS_TRACE_BUG,(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),__LINE__)) +#ifndef BUG +#define BUG() do {\ + yaffs_trace(YAFFS_TRACE_BUG,\ + "==>> yaffs bug: " __FILE__ " %d",\ + __LINE__);\ + Y_DUMP_STACK();\ +} while (0) #endif #endif |