diff options
author | Tom Rini <trini@ti.com> | 2013-03-11 12:02:40 -0400 |
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committer | Tom Rini <trini@ti.com> | 2013-03-11 12:16:13 -0400 |
commit | 76b40ab41eff1f402ee52ba768b09daad293b9bb (patch) | |
tree | 4956296adbdc8939aa49d84fa9bd497eef65b7f4 /fs/ext4/ext4fs.c | |
parent | de62688bb61c499ecc2d70a3aa8ccf90bb7a8ef6 (diff) | |
parent | fc959081d41aab2d6f4614c5fb3dd1b77ffcdcf4 (diff) | |
download | u-boot-imx-76b40ab41eff1f402ee52ba768b09daad293b9bb.zip u-boot-imx-76b40ab41eff1f402ee52ba768b09daad293b9bb.tar.gz u-boot-imx-76b40ab41eff1f402ee52ba768b09daad293b9bb.tar.bz2 |
Merge u-boot/master into u-boot-ti/master
In master we had already taken a patch to fix the davinci GPIO code for
CONFIG_SOC_DM646X and in u-boot-ti we have additional patches to support
DA830 (which is CONFIG_SOC_DA8XX && !CONFIG_SOC_DA850). Resolve these
conflicts manually and comment the #else/#endif lines for clarity.
Conflicts:
arch/arm/include/asm/arch-davinci/gpio.h
drivers/gpio/da8xx_gpio.c
Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'fs/ext4/ext4fs.c')
-rw-r--r-- | fs/ext4/ext4fs.c | 962 |
1 files changed, 18 insertions, 944 deletions
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c index f02c215..4dddde2 100644 --- a/fs/ext4/ext4fs.c +++ b/fs/ext4/ext4fs.c @@ -34,13 +34,8 @@ */ #include <common.h> -#include <malloc.h> #include <ext_common.h> #include <ext4fs.h> -#include <linux/stat.h> -#include <linux/time.h> -#include <asm/byteorder.h> -#include <div64.h> #include "ext4_common.h" int ext4fs_symlinknest; @@ -197,960 +192,39 @@ int ext4fs_read(char *buf, unsigned len) return ext4fs_read_file(ext4fs_file, 0, len, buf); } -#if defined(CONFIG_EXT4_WRITE) -static void ext4fs_update(void) +int ext4fs_probe(block_dev_desc_t *fs_dev_desc, + disk_partition_t *fs_partition) { - short i; - ext4fs_update_journal(); - struct ext_filesystem *fs = get_fs(); + ext4fs_set_blk_dev(fs_dev_desc, fs_partition); - /* update super block */ - put_ext4((uint64_t)(SUPERBLOCK_SIZE), - (struct ext2_sblock *)fs->sb, (uint32_t)SUPERBLOCK_SIZE); - - /* update block groups */ - for (i = 0; i < fs->no_blkgrp; i++) { - fs->bgd[i].bg_checksum = ext4fs_checksum_update(i); - put_ext4((uint64_t)(fs->bgd[i].block_id * fs->blksz), - fs->blk_bmaps[i], fs->blksz); - } - - /* update inode table groups */ - for (i = 0; i < fs->no_blkgrp; i++) { - put_ext4((uint64_t) (fs->bgd[i].inode_id * fs->blksz), - fs->inode_bmaps[i], fs->blksz); - } - - /* update the block group descriptor table */ - put_ext4((uint64_t)(fs->gdtable_blkno * fs->blksz), - (struct ext2_block_group *)fs->gdtable, - (fs->blksz * fs->no_blk_pergdt)); - - ext4fs_dump_metadata(); - - gindex = 0; - gd_index = 0; -} - -int ext4fs_get_bgdtable(void) -{ - int status; - int grp_desc_size; - struct ext_filesystem *fs = get_fs(); - grp_desc_size = sizeof(struct ext2_block_group); - fs->no_blk_pergdt = (fs->no_blkgrp * grp_desc_size) / fs->blksz; - if ((fs->no_blkgrp * grp_desc_size) % fs->blksz) - fs->no_blk_pergdt++; - - /* allocate memory for gdtable */ - fs->gdtable = zalloc(fs->blksz * fs->no_blk_pergdt); - if (!fs->gdtable) - return -ENOMEM; - /* read the group descriptor table */ - status = ext4fs_devread(fs->gdtable_blkno * fs->sect_perblk, 0, - fs->blksz * fs->no_blk_pergdt, fs->gdtable); - if (status == 0) - goto fail; - - if (ext4fs_log_gdt(fs->gdtable)) { - printf("Error in ext4fs_log_gdt\n"); + if (!ext4fs_mount(fs_partition->size)) { + ext4fs_close(); return -1; } return 0; -fail: - free(fs->gdtable); - fs->gdtable = NULL; - - return -1; -} - -static void delete_single_indirect_block(struct ext2_inode *inode) -{ - struct ext2_block_group *bgd = NULL; - static int prev_bg_bmap_idx = -1; - long int blknr; - int remainder; - int bg_idx; - int status; - unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group; - struct ext_filesystem *fs = get_fs(); - char *journal_buffer = zalloc(fs->blksz); - if (!journal_buffer) { - printf("No memory\n"); - return; - } - /* get block group descriptor table */ - bgd = (struct ext2_block_group *)fs->gdtable; - - /* deleting the single indirect block associated with inode */ - if (inode->b.blocks.indir_block != 0) { - debug("SIPB releasing %u\n", inode->b.blocks.indir_block); - blknr = inode->b.blocks.indir_block; - if (fs->blksz != 1024) { - bg_idx = blknr / blk_per_grp; - } else { - bg_idx = blknr / blk_per_grp; - remainder = blknr % blk_per_grp; - if (!remainder) - bg_idx--; - } - ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx); - bgd[bg_idx].free_blocks++; - fs->sb->free_blocks++; - /* journal backup */ - if (prev_bg_bmap_idx != bg_idx) { - status = - ext4fs_devread(bgd[bg_idx].block_id * - fs->sect_perblk, 0, fs->blksz, - journal_buffer); - if (status == 0) - goto fail; - if (ext4fs_log_journal - (journal_buffer, bgd[bg_idx].block_id)) - goto fail; - prev_bg_bmap_idx = bg_idx; - } - } -fail: - free(journal_buffer); -} - -static void delete_double_indirect_block(struct ext2_inode *inode) -{ - int i; - short status; - static int prev_bg_bmap_idx = -1; - long int blknr; - int remainder; - int bg_idx; - unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group; - unsigned int *di_buffer = NULL; - unsigned int *DIB_start_addr = NULL; - struct ext2_block_group *bgd = NULL; - struct ext_filesystem *fs = get_fs(); - char *journal_buffer = zalloc(fs->blksz); - if (!journal_buffer) { - printf("No memory\n"); - return; - } - /* get the block group descriptor table */ - bgd = (struct ext2_block_group *)fs->gdtable; - - if (inode->b.blocks.double_indir_block != 0) { - di_buffer = zalloc(fs->blksz); - if (!di_buffer) { - printf("No memory\n"); - return; - } - DIB_start_addr = (unsigned int *)di_buffer; - blknr = inode->b.blocks.double_indir_block; - status = ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz, - (char *)di_buffer); - for (i = 0; i < fs->blksz / sizeof(int); i++) { - if (*di_buffer == 0) - break; - - debug("DICB releasing %u\n", *di_buffer); - if (fs->blksz != 1024) { - bg_idx = (*di_buffer) / blk_per_grp; - } else { - bg_idx = (*di_buffer) / blk_per_grp; - remainder = (*di_buffer) % blk_per_grp; - if (!remainder) - bg_idx--; - } - ext4fs_reset_block_bmap(*di_buffer, - fs->blk_bmaps[bg_idx], bg_idx); - di_buffer++; - bgd[bg_idx].free_blocks++; - fs->sb->free_blocks++; - /* journal backup */ - if (prev_bg_bmap_idx != bg_idx) { - status = ext4fs_devread(bgd[bg_idx].block_id - * fs->sect_perblk, 0, - fs->blksz, - journal_buffer); - if (status == 0) - goto fail; - - if (ext4fs_log_journal(journal_buffer, - bgd[bg_idx].block_id)) - goto fail; - prev_bg_bmap_idx = bg_idx; - } - } - - /* removing the parent double indirect block */ - blknr = inode->b.blocks.double_indir_block; - if (fs->blksz != 1024) { - bg_idx = blknr / blk_per_grp; - } else { - bg_idx = blknr / blk_per_grp; - remainder = blknr % blk_per_grp; - if (!remainder) - bg_idx--; - } - ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx); - bgd[bg_idx].free_blocks++; - fs->sb->free_blocks++; - /* journal backup */ - if (prev_bg_bmap_idx != bg_idx) { - memset(journal_buffer, '\0', fs->blksz); - status = ext4fs_devread(bgd[bg_idx].block_id * - fs->sect_perblk, 0, fs->blksz, - journal_buffer); - if (status == 0) - goto fail; - - if (ext4fs_log_journal(journal_buffer, - bgd[bg_idx].block_id)) - goto fail; - prev_bg_bmap_idx = bg_idx; - } - debug("DIPB releasing %ld\n", blknr); - } -fail: - free(DIB_start_addr); - free(journal_buffer); -} - -static void delete_triple_indirect_block(struct ext2_inode *inode) -{ - int i, j; - short status; - static int prev_bg_bmap_idx = -1; - long int blknr; - int remainder; - int bg_idx; - unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group; - unsigned int *tigp_buffer = NULL; - unsigned int *tib_start_addr = NULL; - unsigned int *tip_buffer = NULL; - unsigned int *tipb_start_addr = NULL; - struct ext2_block_group *bgd = NULL; - struct ext_filesystem *fs = get_fs(); - char *journal_buffer = zalloc(fs->blksz); - if (!journal_buffer) { - printf("No memory\n"); - return; - } - /* get block group descriptor table */ - bgd = (struct ext2_block_group *)fs->gdtable; - - if (inode->b.blocks.triple_indir_block != 0) { - tigp_buffer = zalloc(fs->blksz); - if (!tigp_buffer) { - printf("No memory\n"); - return; - } - tib_start_addr = (unsigned int *)tigp_buffer; - blknr = inode->b.blocks.triple_indir_block; - status = ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz, - (char *)tigp_buffer); - for (i = 0; i < fs->blksz / sizeof(int); i++) { - if (*tigp_buffer == 0) - break; - debug("tigp buffer releasing %u\n", *tigp_buffer); - - tip_buffer = zalloc(fs->blksz); - if (!tip_buffer) - goto fail; - tipb_start_addr = (unsigned int *)tip_buffer; - status = ext4fs_devread((*tigp_buffer) * - fs->sect_perblk, 0, fs->blksz, - (char *)tip_buffer); - for (j = 0; j < fs->blksz / sizeof(int); j++) { - if (*tip_buffer == 0) - break; - if (fs->blksz != 1024) { - bg_idx = (*tip_buffer) / blk_per_grp; - } else { - bg_idx = (*tip_buffer) / blk_per_grp; - - remainder = (*tip_buffer) % blk_per_grp; - if (!remainder) - bg_idx--; - } - - ext4fs_reset_block_bmap(*tip_buffer, - fs->blk_bmaps[bg_idx], - bg_idx); - - tip_buffer++; - bgd[bg_idx].free_blocks++; - fs->sb->free_blocks++; - /* journal backup */ - if (prev_bg_bmap_idx != bg_idx) { - status = - ext4fs_devread( - bgd[bg_idx].block_id * - fs->sect_perblk, 0, - fs->blksz, - journal_buffer); - if (status == 0) - goto fail; - - if (ext4fs_log_journal(journal_buffer, - bgd[bg_idx]. - block_id)) - goto fail; - prev_bg_bmap_idx = bg_idx; - } - } - free(tipb_start_addr); - tipb_start_addr = NULL; - - /* - * removing the grand parent blocks - * which is connected to inode - */ - if (fs->blksz != 1024) { - bg_idx = (*tigp_buffer) / blk_per_grp; - } else { - bg_idx = (*tigp_buffer) / blk_per_grp; - - remainder = (*tigp_buffer) % blk_per_grp; - if (!remainder) - bg_idx--; - } - ext4fs_reset_block_bmap(*tigp_buffer, - fs->blk_bmaps[bg_idx], bg_idx); - - tigp_buffer++; - bgd[bg_idx].free_blocks++; - fs->sb->free_blocks++; - /* journal backup */ - if (prev_bg_bmap_idx != bg_idx) { - memset(journal_buffer, '\0', fs->blksz); - status = - ext4fs_devread(bgd[bg_idx].block_id * - fs->sect_perblk, 0, - fs->blksz, journal_buffer); - if (status == 0) - goto fail; - - if (ext4fs_log_journal(journal_buffer, - bgd[bg_idx].block_id)) - goto fail; - prev_bg_bmap_idx = bg_idx; - } - } - - /* removing the grand parent triple indirect block */ - blknr = inode->b.blocks.triple_indir_block; - if (fs->blksz != 1024) { - bg_idx = blknr / blk_per_grp; - } else { - bg_idx = blknr / blk_per_grp; - remainder = blknr % blk_per_grp; - if (!remainder) - bg_idx--; - } - ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx); - bgd[bg_idx].free_blocks++; - fs->sb->free_blocks++; - /* journal backup */ - if (prev_bg_bmap_idx != bg_idx) { - memset(journal_buffer, '\0', fs->blksz); - status = ext4fs_devread(bgd[bg_idx].block_id * - fs->sect_perblk, 0, fs->blksz, - journal_buffer); - if (status == 0) - goto fail; - - if (ext4fs_log_journal(journal_buffer, - bgd[bg_idx].block_id)) - goto fail; - prev_bg_bmap_idx = bg_idx; - } - debug("tigp buffer itself releasing %ld\n", blknr); - } -fail: - free(tib_start_addr); - free(tipb_start_addr); - free(journal_buffer); -} - -static int ext4fs_delete_file(int inodeno) -{ - struct ext2_inode inode; - short status; - int i; - int remainder; - long int blknr; - int bg_idx; - int ibmap_idx; - char *read_buffer = NULL; - char *start_block_address = NULL; - unsigned int no_blocks; - - static int prev_bg_bmap_idx = -1; - unsigned int inodes_per_block; - long int blkno; - unsigned int blkoff; - unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group; - unsigned int inode_per_grp = ext4fs_root->sblock.inodes_per_group; - struct ext2_inode *inode_buffer = NULL; - struct ext2_block_group *bgd = NULL; - struct ext_filesystem *fs = get_fs(); - char *journal_buffer = zalloc(fs->blksz); - if (!journal_buffer) - return -ENOMEM; - /* get the block group descriptor table */ - bgd = (struct ext2_block_group *)fs->gdtable; - status = ext4fs_read_inode(ext4fs_root, inodeno, &inode); - if (status == 0) - goto fail; - - /* read the block no allocated to a file */ - no_blocks = inode.size / fs->blksz; - if (inode.size % fs->blksz) - no_blocks++; - - if (le32_to_cpu(inode.flags) & EXT4_EXTENTS_FL) { - struct ext2fs_node *node_inode = - zalloc(sizeof(struct ext2fs_node)); - if (!node_inode) - goto fail; - node_inode->data = ext4fs_root; - node_inode->ino = inodeno; - node_inode->inode_read = 0; - memcpy(&(node_inode->inode), &inode, sizeof(struct ext2_inode)); - - for (i = 0; i < no_blocks; i++) { - blknr = read_allocated_block(&(node_inode->inode), i); - if (fs->blksz != 1024) { - bg_idx = blknr / blk_per_grp; - } else { - bg_idx = blknr / blk_per_grp; - remainder = blknr % blk_per_grp; - if (!remainder) - bg_idx--; - } - ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], - bg_idx); - debug("EXT4_EXTENTS Block releasing %ld: %d\n", - blknr, bg_idx); - - bgd[bg_idx].free_blocks++; - fs->sb->free_blocks++; - - /* journal backup */ - if (prev_bg_bmap_idx != bg_idx) { - status = - ext4fs_devread(bgd[bg_idx].block_id * - fs->sect_perblk, 0, - fs->blksz, journal_buffer); - if (status == 0) - goto fail; - if (ext4fs_log_journal(journal_buffer, - bgd[bg_idx].block_id)) - goto fail; - prev_bg_bmap_idx = bg_idx; - } - } - if (node_inode) { - free(node_inode); - node_inode = NULL; - } - } else { - - delete_single_indirect_block(&inode); - delete_double_indirect_block(&inode); - delete_triple_indirect_block(&inode); - - /* read the block no allocated to a file */ - no_blocks = inode.size / fs->blksz; - if (inode.size % fs->blksz) - no_blocks++; - for (i = 0; i < no_blocks; i++) { - blknr = read_allocated_block(&inode, i); - if (fs->blksz != 1024) { - bg_idx = blknr / blk_per_grp; - } else { - bg_idx = blknr / blk_per_grp; - remainder = blknr % blk_per_grp; - if (!remainder) - bg_idx--; - } - ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], - bg_idx); - debug("ActualB releasing %ld: %d\n", blknr, bg_idx); - - bgd[bg_idx].free_blocks++; - fs->sb->free_blocks++; - /* journal backup */ - if (prev_bg_bmap_idx != bg_idx) { - memset(journal_buffer, '\0', fs->blksz); - status = ext4fs_devread(bgd[bg_idx].block_id - * fs->sect_perblk, - 0, fs->blksz, - journal_buffer); - if (status == 0) - goto fail; - if (ext4fs_log_journal(journal_buffer, - bgd[bg_idx].block_id)) - goto fail; - prev_bg_bmap_idx = bg_idx; - } - } - } - - /* from the inode no to blockno */ - inodes_per_block = fs->blksz / fs->inodesz; - ibmap_idx = inodeno / inode_per_grp; - - /* get the block no */ - inodeno--; - blkno = __le32_to_cpu(bgd[ibmap_idx].inode_table_id) + - (inodeno % __le32_to_cpu(inode_per_grp)) / inodes_per_block; - - /* get the offset of the inode */ - blkoff = ((inodeno) % inodes_per_block) * fs->inodesz; - - /* read the block no containing the inode */ - read_buffer = zalloc(fs->blksz); - if (!read_buffer) - goto fail; - start_block_address = read_buffer; - status = ext4fs_devread(blkno * fs->sect_perblk, - 0, fs->blksz, read_buffer); - if (status == 0) - goto fail; - - if (ext4fs_log_journal(read_buffer, blkno)) - goto fail; - - read_buffer = read_buffer + blkoff; - inode_buffer = (struct ext2_inode *)read_buffer; - memset(inode_buffer, '\0', sizeof(struct ext2_inode)); - - /* write the inode to original position in inode table */ - if (ext4fs_put_metadata(start_block_address, blkno)) - goto fail; - - /* update the respective inode bitmaps */ - inodeno++; - ext4fs_reset_inode_bmap(inodeno, fs->inode_bmaps[ibmap_idx], ibmap_idx); - bgd[ibmap_idx].free_inodes++; - fs->sb->free_inodes++; - /* journal backup */ - memset(journal_buffer, '\0', fs->blksz); - status = ext4fs_devread(bgd[ibmap_idx].inode_id * - fs->sect_perblk, 0, fs->blksz, journal_buffer); - if (status == 0) - goto fail; - if (ext4fs_log_journal(journal_buffer, bgd[ibmap_idx].inode_id)) - goto fail; - - ext4fs_update(); - ext4fs_deinit(); - - if (ext4fs_init() != 0) { - printf("error in File System init\n"); - goto fail; - } - - free(start_block_address); - free(journal_buffer); - - return 0; -fail: - free(start_block_address); - free(journal_buffer); - - return -1; -} - -int ext4fs_init(void) -{ - short status; - int i; - unsigned int real_free_blocks = 0; - struct ext_filesystem *fs = get_fs(); - - /* populate fs */ - fs->blksz = EXT2_BLOCK_SIZE(ext4fs_root); - fs->inodesz = INODE_SIZE_FILESYSTEM(ext4fs_root); - fs->sect_perblk = fs->blksz / SECTOR_SIZE; - - /* get the superblock */ - fs->sb = zalloc(SUPERBLOCK_SIZE); - if (!fs->sb) - return -ENOMEM; - if (!ext4fs_devread(SUPERBLOCK_SECTOR, 0, SUPERBLOCK_SIZE, - (char *)fs->sb)) - goto fail; - - /* init journal */ - if (ext4fs_init_journal()) - goto fail; - - /* get total no of blockgroups */ - fs->no_blkgrp = (uint32_t)ext4fs_div_roundup( - (ext4fs_root->sblock.total_blocks - - ext4fs_root->sblock.first_data_block), - ext4fs_root->sblock.blocks_per_group); - - /* get the block group descriptor table */ - fs->gdtable_blkno = ((EXT2_MIN_BLOCK_SIZE == fs->blksz) + 1); - if (ext4fs_get_bgdtable() == -1) { - printf("Error in getting the block group descriptor table\n"); - goto fail; - } - fs->bgd = (struct ext2_block_group *)fs->gdtable; - - /* load all the available bitmap block of the partition */ - fs->blk_bmaps = zalloc(fs->no_blkgrp * sizeof(char *)); - if (!fs->blk_bmaps) - goto fail; - for (i = 0; i < fs->no_blkgrp; i++) { - fs->blk_bmaps[i] = zalloc(fs->blksz); - if (!fs->blk_bmaps[i]) - goto fail; - } - - for (i = 0; i < fs->no_blkgrp; i++) { - status = - ext4fs_devread(fs->bgd[i].block_id * fs->sect_perblk, 0, - fs->blksz, (char *)fs->blk_bmaps[i]); - if (status == 0) - goto fail; - } - - /* load all the available inode bitmap of the partition */ - fs->inode_bmaps = zalloc(fs->no_blkgrp * sizeof(unsigned char *)); - if (!fs->inode_bmaps) - goto fail; - for (i = 0; i < fs->no_blkgrp; i++) { - fs->inode_bmaps[i] = zalloc(fs->blksz); - if (!fs->inode_bmaps[i]) - goto fail; - } - - for (i = 0; i < fs->no_blkgrp; i++) { - status = ext4fs_devread(fs->bgd[i].inode_id * fs->sect_perblk, - 0, fs->blksz, - (char *)fs->inode_bmaps[i]); - if (status == 0) - goto fail; - } - - /* - * check filesystem consistency with free blocks of file system - * some time we observed that superblock freeblocks does not match - * with the blockgroups freeblocks when improper - * reboot of a linux kernel - */ - for (i = 0; i < fs->no_blkgrp; i++) - real_free_blocks = real_free_blocks + fs->bgd[i].free_blocks; - if (real_free_blocks != fs->sb->free_blocks) - fs->sb->free_blocks = real_free_blocks; - - return 0; -fail: - ext4fs_deinit(); - - return -1; -} - -void ext4fs_deinit(void) -{ - int i; - struct ext2_inode inode_journal; - struct journal_superblock_t *jsb; - long int blknr; - struct ext_filesystem *fs = get_fs(); - - /* free journal */ - char *temp_buff = zalloc(fs->blksz); - if (temp_buff) { - ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, - &inode_journal); - blknr = read_allocated_block(&inode_journal, - EXT2_JOURNAL_SUPERBLOCK); - ext4fs_devread(blknr * fs->sect_perblk, 0, fs->blksz, - temp_buff); - jsb = (struct journal_superblock_t *)temp_buff; - jsb->s_start = cpu_to_be32(0); - put_ext4((uint64_t) (blknr * fs->blksz), - (struct journal_superblock_t *)temp_buff, fs->blksz); - free(temp_buff); - } - ext4fs_free_journal(); - - /* get the superblock */ - ext4fs_devread(SUPERBLOCK_SECTOR, 0, SUPERBLOCK_SIZE, (char *)fs->sb); - fs->sb->feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER; - put_ext4((uint64_t)(SUPERBLOCK_SIZE), - (struct ext2_sblock *)fs->sb, (uint32_t)SUPERBLOCK_SIZE); - free(fs->sb); - fs->sb = NULL; - - if (fs->blk_bmaps) { - for (i = 0; i < fs->no_blkgrp; i++) { - free(fs->blk_bmaps[i]); - fs->blk_bmaps[i] = NULL; - } - free(fs->blk_bmaps); - fs->blk_bmaps = NULL; - } - - if (fs->inode_bmaps) { - for (i = 0; i < fs->no_blkgrp; i++) { - free(fs->inode_bmaps[i]); - fs->inode_bmaps[i] = NULL; - } - free(fs->inode_bmaps); - fs->inode_bmaps = NULL; - } - - - free(fs->gdtable); - fs->gdtable = NULL; - fs->bgd = NULL; - /* - * reinitiliazed the global inode and - * block bitmap first execution check variables - */ - fs->first_pass_ibmap = 0; - fs->first_pass_bbmap = 0; - fs->curr_inode_no = 0; - fs->curr_blkno = 0; -} - -static int ext4fs_write_file(struct ext2_inode *file_inode, - int pos, unsigned int len, char *buf) -{ - int i; - int blockcnt; - int log2blocksize = LOG2_EXT2_BLOCK_SIZE(ext4fs_root); - unsigned int filesize = __le32_to_cpu(file_inode->size); - struct ext_filesystem *fs = get_fs(); - int previous_block_number = -1; - int delayed_start = 0; - int delayed_extent = 0; - int delayed_next = 0; - char *delayed_buf = NULL; - - /* Adjust len so it we can't read past the end of the file. */ - if (len > filesize) - len = filesize; - - blockcnt = ((len + pos) + fs->blksz - 1) / fs->blksz; - - for (i = pos / fs->blksz; i < blockcnt; i++) { - long int blknr; - int blockend = fs->blksz; - int skipfirst = 0; - blknr = read_allocated_block(file_inode, i); - if (blknr < 0) - return -1; - - blknr = blknr << log2blocksize; - - if (blknr) { - if (previous_block_number != -1) { - if (delayed_next == blknr) { - delayed_extent += blockend; - delayed_next += blockend >> SECTOR_BITS; - } else { /* spill */ - put_ext4((uint64_t) (delayed_start * - SECTOR_SIZE), - delayed_buf, - (uint32_t) delayed_extent); - previous_block_number = blknr; - delayed_start = blknr; - delayed_extent = blockend; - delayed_buf = buf; - delayed_next = blknr + - (blockend >> SECTOR_BITS); - } - } else { - previous_block_number = blknr; - delayed_start = blknr; - delayed_extent = blockend; - delayed_buf = buf; - delayed_next = blknr + - (blockend >> SECTOR_BITS); - } - } else { - if (previous_block_number != -1) { - /* spill */ - put_ext4((uint64_t) (delayed_start * - SECTOR_SIZE), delayed_buf, - (uint32_t) delayed_extent); - previous_block_number = -1; - } - memset(buf, 0, fs->blksz - skipfirst); - } - buf += fs->blksz - skipfirst; - } - if (previous_block_number != -1) { - /* spill */ - put_ext4((uint64_t) (delayed_start * SECTOR_SIZE), - delayed_buf, (uint32_t) delayed_extent); - previous_block_number = -1; - } - - return len; } -int ext4fs_write(const char *fname, unsigned char *buffer, - unsigned long sizebytes) +int ext4_read_file(const char *filename, void *buf, int offset, int len) { - int ret = 0; - struct ext2_inode *file_inode = NULL; - unsigned char *inode_buffer = NULL; - int parent_inodeno; - int inodeno; - time_t timestamp = 0; - - uint64_t bytes_reqd_for_file; - unsigned int blks_reqd_for_file; - unsigned int blocks_remaining; - int existing_file_inodeno; - char *temp_ptr = NULL; - long int itable_blkno; - long int parent_itable_blkno; - long int blkoff; - struct ext2_sblock *sblock = &(ext4fs_root->sblock); - unsigned int inodes_per_block; - unsigned int ibmap_idx; - struct ext_filesystem *fs = get_fs(); - ALLOC_CACHE_ALIGN_BUFFER(char, filename, 256); - memset(filename, 0x00, sizeof(filename)); + int file_len; + int len_read; - g_parent_inode = zalloc(sizeof(struct ext2_inode)); - if (!g_parent_inode) - goto fail; - - if (ext4fs_init() != 0) { - printf("error in File System init\n"); + if (offset != 0) { + printf("** Cannot support non-zero offset **\n"); return -1; } - inodes_per_block = fs->blksz / fs->inodesz; - parent_inodeno = ext4fs_get_parent_inode_num(fname, filename, F_FILE); - if (parent_inodeno == -1) - goto fail; - if (ext4fs_iget(parent_inodeno, g_parent_inode)) - goto fail; - /* check if the filename is already present in root */ - existing_file_inodeno = ext4fs_filename_check(filename); - if (existing_file_inodeno != -1) { - ret = ext4fs_delete_file(existing_file_inodeno); - fs->first_pass_bbmap = 0; - fs->curr_blkno = 0; - - fs->first_pass_ibmap = 0; - fs->curr_inode_no = 0; - if (ret) - goto fail; - } - /* calucalate how many blocks required */ - bytes_reqd_for_file = sizebytes; - blks_reqd_for_file = lldiv(bytes_reqd_for_file, fs->blksz); - if (do_div(bytes_reqd_for_file, fs->blksz) != 0) { - blks_reqd_for_file++; - debug("total bytes for a file %u\n", blks_reqd_for_file); - } - blocks_remaining = blks_reqd_for_file; - /* test for available space in partition */ - if (fs->sb->free_blocks < blks_reqd_for_file) { - printf("Not enough space on partition !!!\n"); - goto fail; - } - ext4fs_update_parent_dentry(filename, &inodeno, FILETYPE_REG); - /* prepare file inode */ - inode_buffer = zalloc(fs->inodesz); - if (!inode_buffer) - goto fail; - file_inode = (struct ext2_inode *)inode_buffer; - file_inode->mode = S_IFREG | S_IRWXU | - S_IRGRP | S_IROTH | S_IXGRP | S_IXOTH; - /* ToDo: Update correct time */ - file_inode->mtime = timestamp; - file_inode->atime = timestamp; - file_inode->ctime = timestamp; - file_inode->nlinks = 1; - file_inode->size = sizebytes; - - /* Allocate data blocks */ - ext4fs_allocate_blocks(file_inode, blocks_remaining, - &blks_reqd_for_file); - file_inode->blockcnt = (blks_reqd_for_file * fs->blksz) / SECTOR_SIZE; - - temp_ptr = zalloc(fs->blksz); - if (!temp_ptr) - goto fail; - ibmap_idx = inodeno / ext4fs_root->sblock.inodes_per_group; - inodeno--; - itable_blkno = __le32_to_cpu(fs->bgd[ibmap_idx].inode_table_id) + - (inodeno % __le32_to_cpu(sblock->inodes_per_group)) / - inodes_per_block; - blkoff = (inodeno % inodes_per_block) * fs->inodesz; - ext4fs_devread(itable_blkno * fs->sect_perblk, 0, fs->blksz, temp_ptr); - if (ext4fs_log_journal(temp_ptr, itable_blkno)) - goto fail; - - memcpy(temp_ptr + blkoff, inode_buffer, fs->inodesz); - if (ext4fs_put_metadata(temp_ptr, itable_blkno)) - goto fail; - /* copy the file content into data blocks */ - if (ext4fs_write_file(file_inode, 0, sizebytes, (char *)buffer) == -1) { - printf("Error in copying content\n"); - goto fail; - } - ibmap_idx = parent_inodeno / ext4fs_root->sblock.inodes_per_group; - parent_inodeno--; - parent_itable_blkno = __le32_to_cpu(fs->bgd[ibmap_idx].inode_table_id) + - (parent_inodeno % - __le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block; - blkoff = (parent_inodeno % inodes_per_block) * fs->inodesz; - if (parent_itable_blkno != itable_blkno) { - memset(temp_ptr, '\0', fs->blksz); - ext4fs_devread(parent_itable_blkno * fs->sect_perblk, - 0, fs->blksz, temp_ptr); - if (ext4fs_log_journal(temp_ptr, parent_itable_blkno)) - goto fail; - - memcpy(temp_ptr + blkoff, g_parent_inode, - sizeof(struct ext2_inode)); - if (ext4fs_put_metadata(temp_ptr, parent_itable_blkno)) - goto fail; - free(temp_ptr); - } else { - /* - * If parent and child fall in same inode table block - * both should be kept in 1 buffer - */ - memcpy(temp_ptr + blkoff, g_parent_inode, - sizeof(struct ext2_inode)); - gd_index--; - if (ext4fs_put_metadata(temp_ptr, itable_blkno)) - goto fail; - free(temp_ptr); + file_len = ext4fs_open(filename); + if (file_len < 0) { + printf("** File not found %s **\n", filename); + return -1; } - ext4fs_update(); - ext4fs_deinit(); - fs->first_pass_bbmap = 0; - fs->curr_blkno = 0; - fs->first_pass_ibmap = 0; - fs->curr_inode_no = 0; - free(inode_buffer); - free(g_parent_inode); - g_parent_inode = NULL; + if (len == 0) + len = file_len; - return 0; -fail: - ext4fs_deinit(); - free(inode_buffer); - free(g_parent_inode); - g_parent_inode = NULL; + len_read = ext4fs_read(buf, len); - return -1; + return len_read; } -#endif |