/* * (C) Copyright 2011 - 2012 Samsung Electronics * EXT4 filesystem implementation in Uboot by * Uma Shankar <uma.shankar@samsung.com> * Manjunatha C Achar <a.manjunatha@samsung.com> * * Data structures and headers for ext4 support have been taken from * ext2 ls load support in Uboot * * (C) Copyright 2004 * esd gmbh <www.esd-electronics.com> * Reinhard Arlt <reinhard.arlt@esd-electronics.com> * * based on code from grub2 fs/ext2.c and fs/fshelp.c by * GRUB -- GRand Unified Bootloader * Copyright (C) 2003, 2004 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef __EXT_COMMON__ #define __EXT_COMMON__ #include <command.h> #define SECTOR_SIZE 0x200 #define SECTOR_BITS 9 /* Magic value used to identify an ext2 filesystem. */ #define EXT2_MAGIC 0xEF53 /* Amount of indirect blocks in an inode. */ #define INDIRECT_BLOCKS 12 /* Maximum lenght of a pathname. */ #define EXT2_PATH_MAX 4096 /* Maximum nesting of symlinks, used to prevent a loop. */ #define EXT2_MAX_SYMLINKCNT 8 /* Filetype used in directory entry. */ #define FILETYPE_UNKNOWN 0 #define FILETYPE_REG 1 #define FILETYPE_DIRECTORY 2 #define FILETYPE_SYMLINK 7 /* Filetype information as used in inodes. */ #define FILETYPE_INO_MASK 0170000 #define FILETYPE_INO_REG 0100000 #define FILETYPE_INO_DIRECTORY 0040000 #define FILETYPE_INO_SYMLINK 0120000 #define EXT2_ROOT_INO 2 /* Root inode */ /* Bits used as offset in sector */ #define DISK_SECTOR_BITS 9 /* The size of an ext2 block in bytes. */ #define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) /* Log2 size of ext2 block in 512 blocks. */ #define LOG2_EXT2_BLOCK_SIZE(data) (__le32_to_cpu \ (data->sblock.log2_block_size) + 1) /* Log2 size of ext2 block in bytes. */ #define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \ (data->sblock.log2_block_size) + 10) #define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \ (data->sblock.inode_size)) #define EXT2_FT_DIR 2 #define SUCCESS 1 /* Macro-instructions used to manage several block sizes */ #define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ #define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ #define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) #define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) /* The ext2 superblock. */ struct ext2_sblock { uint32_t total_inodes; uint32_t total_blocks; uint32_t reserved_blocks; uint32_t free_blocks; uint32_t free_inodes; uint32_t first_data_block; uint32_t log2_block_size; uint32_t log2_fragment_size; uint32_t blocks_per_group; uint32_t fragments_per_group; uint32_t inodes_per_group; uint32_t mtime; uint32_t utime; uint16_t mnt_count; uint16_t max_mnt_count; uint16_t magic; uint16_t fs_state; uint16_t error_handling; uint16_t minor_revision_level; uint32_t lastcheck; uint32_t checkinterval; uint32_t creator_os; uint32_t revision_level; uint16_t uid_reserved; uint16_t gid_reserved; uint32_t first_inode; uint16_t inode_size; uint16_t block_group_number; uint32_t feature_compatibility; uint32_t feature_incompat; uint32_t feature_ro_compat; uint32_t unique_id[4]; char volume_name[16]; char last_mounted_on[64]; uint32_t compression_info; }; struct ext2_block_group { __u32 block_id; /* Blocks bitmap block */ __u32 inode_id; /* Inodes bitmap block */ __u32 inode_table_id; /* Inodes table block */ __u16 free_blocks; /* Free blocks count */ __u16 free_inodes; /* Free inodes count */ __u16 used_dir_cnt; /* Directories count */ __u16 bg_flags; __u32 bg_reserved[2]; __u16 bg_itable_unused; /* Unused inodes count */ __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ }; /* The ext2 inode. */ struct ext2_inode { uint16_t mode; uint16_t uid; uint32_t size; uint32_t atime; uint32_t ctime; uint32_t mtime; uint32_t dtime; uint16_t gid; uint16_t nlinks; uint32_t blockcnt; /* Blocks of 512 bytes!! */ uint32_t flags; uint32_t osd1; union { struct datablocks { uint32_t dir_blocks[INDIRECT_BLOCKS]; uint32_t indir_block; uint32_t double_indir_block; uint32_t triple_indir_block; } blocks; char symlink[60]; } b; uint32_t version; uint32_t acl; uint32_t dir_acl; uint32_t fragment_addr; uint32_t osd2[3]; }; /* The header of an ext2 directory entry. */ struct ext2_dirent { uint32_t inode; uint16_t direntlen; uint8_t namelen; uint8_t filetype; }; struct ext2fs_node { struct ext2_data *data; struct ext2_inode inode; int ino; int inode_read; }; /* Information about a "mounted" ext2 filesystem. */ struct ext2_data { struct ext2_sblock sblock; struct ext2_inode *inode; struct ext2fs_node diropen; }; extern unsigned long part_offset; int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); #endif