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50ce4c07df
The 512 byte block size was hard coded in the ext4 file systems. Large harddisks today support bigger block sizes typically 4096 bytes. This patch removes this limitation. Signed-off-by: Egbert Eich <eich@suse.com>
193 lines
5.4 KiB
C
193 lines
5.4 KiB
C
/*
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* (C) Copyright 2011 - 2012 Samsung Electronics
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* EXT4 filesystem implementation in Uboot by
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* Uma Shankar <uma.shankar@samsung.com>
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* Manjunatha C Achar <a.manjunatha@samsung.com>
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*
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* Data structures and headers for ext4 support have been taken from
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* ext2 ls load support in Uboot
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*
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* (C) Copyright 2004
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* esd gmbh <www.esd-electronics.com>
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* Reinhard Arlt <reinhard.arlt@esd-electronics.com>
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*
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* based on code from grub2 fs/ext2.c and fs/fshelp.c by
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __EXT_COMMON__
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#define __EXT_COMMON__
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#include <command.h>
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#define SECTOR_SIZE 0x200
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/* Magic value used to identify an ext2 filesystem. */
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#define EXT2_MAGIC 0xEF53
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/* Amount of indirect blocks in an inode. */
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#define INDIRECT_BLOCKS 12
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/* Maximum lenght of a pathname. */
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#define EXT2_PATH_MAX 4096
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/* Maximum nesting of symlinks, used to prevent a loop. */
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#define EXT2_MAX_SYMLINKCNT 8
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/* Filetype used in directory entry. */
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#define FILETYPE_UNKNOWN 0
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#define FILETYPE_REG 1
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#define FILETYPE_DIRECTORY 2
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#define FILETYPE_SYMLINK 7
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/* Filetype information as used in inodes. */
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#define FILETYPE_INO_MASK 0170000
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#define FILETYPE_INO_REG 0100000
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#define FILETYPE_INO_DIRECTORY 0040000
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#define FILETYPE_INO_SYMLINK 0120000
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#define EXT2_ROOT_INO 2 /* Root inode */
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/* The size of an ext2 block in bytes. */
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#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
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/* Log2 size of ext2 block in bytes. */
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#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \
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(data->sblock.log2_block_size) \
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+ EXT2_MIN_BLOCK_LOG_SIZE)
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#define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \
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(data->sblock.inode_size))
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#define EXT2_FT_DIR 2
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#define SUCCESS 1
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/* Macro-instructions used to manage several block sizes */
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#define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */
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#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */
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#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE)
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#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE)
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/* The ext2 superblock. */
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struct ext2_sblock {
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uint32_t total_inodes;
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uint32_t total_blocks;
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uint32_t reserved_blocks;
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uint32_t free_blocks;
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uint32_t free_inodes;
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uint32_t first_data_block;
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uint32_t log2_block_size;
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uint32_t log2_fragment_size;
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uint32_t blocks_per_group;
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uint32_t fragments_per_group;
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uint32_t inodes_per_group;
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uint32_t mtime;
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uint32_t utime;
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uint16_t mnt_count;
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uint16_t max_mnt_count;
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uint16_t magic;
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uint16_t fs_state;
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uint16_t error_handling;
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uint16_t minor_revision_level;
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uint32_t lastcheck;
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uint32_t checkinterval;
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uint32_t creator_os;
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uint32_t revision_level;
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uint16_t uid_reserved;
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uint16_t gid_reserved;
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uint32_t first_inode;
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uint16_t inode_size;
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uint16_t block_group_number;
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uint32_t feature_compatibility;
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uint32_t feature_incompat;
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uint32_t feature_ro_compat;
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uint32_t unique_id[4];
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char volume_name[16];
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char last_mounted_on[64];
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uint32_t compression_info;
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};
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struct ext2_block_group {
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__u32 block_id; /* Blocks bitmap block */
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__u32 inode_id; /* Inodes bitmap block */
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__u32 inode_table_id; /* Inodes table block */
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__u16 free_blocks; /* Free blocks count */
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__u16 free_inodes; /* Free inodes count */
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__u16 used_dir_cnt; /* Directories count */
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__u16 bg_flags;
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__u32 bg_reserved[2];
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__u16 bg_itable_unused; /* Unused inodes count */
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__u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/
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};
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/* The ext2 inode. */
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struct ext2_inode {
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uint16_t mode;
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uint16_t uid;
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uint32_t size;
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uint32_t atime;
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uint32_t ctime;
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uint32_t mtime;
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uint32_t dtime;
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uint16_t gid;
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uint16_t nlinks;
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uint32_t blockcnt; /* Blocks of 512 bytes!! */
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uint32_t flags;
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uint32_t osd1;
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union {
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struct datablocks {
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uint32_t dir_blocks[INDIRECT_BLOCKS];
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uint32_t indir_block;
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uint32_t double_indir_block;
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uint32_t triple_indir_block;
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} blocks;
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char symlink[60];
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} b;
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uint32_t version;
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uint32_t acl;
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uint32_t dir_acl;
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uint32_t fragment_addr;
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uint32_t osd2[3];
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};
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/* The header of an ext2 directory entry. */
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struct ext2_dirent {
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uint32_t inode;
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uint16_t direntlen;
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uint8_t namelen;
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uint8_t filetype;
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};
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struct ext2fs_node {
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struct ext2_data *data;
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struct ext2_inode inode;
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int ino;
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int inode_read;
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};
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/* Information about a "mounted" ext2 filesystem. */
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struct ext2_data {
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struct ext2_sblock sblock;
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struct ext2_inode *inode;
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struct ext2fs_node diropen;
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};
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extern unsigned long part_offset;
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int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
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int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
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int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[]);
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int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
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int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[]);
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#endif
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