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git.ipfire.org Git - thirdparty/u-boot.git/blob - include/ext_common.h
2 * (C) Copyright 2011 - 2012 Samsung Electronics
3 * EXT4 filesystem implementation in Uboot by
4 * Uma Shankar <uma.shankar@samsung.com>
5 * Manjunatha C Achar <a.manjunatha@samsung.com>
7 * Data structures and headers for ext4 support have been taken from
8 * ext2 ls load support in Uboot
11 * esd gmbh <www.esd-electronics.com>
12 * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
14 * based on code from grub2 fs/ext2.c and fs/fshelp.c by
15 * GRUB -- GRand Unified Bootloader
16 * Copyright (C) 2003, 2004 Free Software Foundation, Inc.
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33 #ifndef __EXT_COMMON__
34 #define __EXT_COMMON__
36 #define SECTOR_SIZE 0x200
39 /* Magic value used to identify an ext2 filesystem. */
40 #define EXT2_MAGIC 0xEF53
41 /* Amount of indirect blocks in an inode. */
42 #define INDIRECT_BLOCKS 12
43 /* Maximum lenght of a pathname. */
44 #define EXT2_PATH_MAX 4096
45 /* Maximum nesting of symlinks, used to prevent a loop. */
46 #define EXT2_MAX_SYMLINKCNT 8
48 /* Filetype used in directory entry. */
49 #define FILETYPE_UNKNOWN 0
50 #define FILETYPE_REG 1
51 #define FILETYPE_DIRECTORY 2
52 #define FILETYPE_SYMLINK 7
54 /* Filetype information as used in inodes. */
55 #define FILETYPE_INO_MASK 0170000
56 #define FILETYPE_INO_REG 0100000
57 #define FILETYPE_INO_DIRECTORY 0040000
58 #define FILETYPE_INO_SYMLINK 0120000
59 #define EXT2_ROOT_INO 2 /* Root inode */
61 /* Bits used as offset in sector */
62 #define DISK_SECTOR_BITS 9
63 /* The size of an ext2 block in bytes. */
64 #define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
66 /* Log2 size of ext2 block in 512 blocks. */
67 #define LOG2_EXT2_BLOCK_SIZE(data) (__le32_to_cpu \
68 (data->sblock.log2_block_size) + 1)
70 /* Log2 size of ext2 block in bytes. */
71 #define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \
72 (data->sblock.log2_block_size) + 10)
73 #define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \
74 (data->sblock.inode_size))
79 /* Macro-instructions used to manage several block sizes */
80 #define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */
81 #define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */
82 #define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE)
83 #define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE)
85 /* The ext2 superblock. */
87 uint32_t total_inodes
;
88 uint32_t total_blocks
;
89 uint32_t reserved_blocks
;
92 uint32_t first_data_block
;
93 uint32_t log2_block_size
;
94 uint32_t log2_fragment_size
;
95 uint32_t blocks_per_group
;
96 uint32_t fragments_per_group
;
97 uint32_t inodes_per_group
;
101 uint16_t max_mnt_count
;
104 uint16_t error_handling
;
105 uint16_t minor_revision_level
;
107 uint32_t checkinterval
;
109 uint32_t revision_level
;
110 uint16_t uid_reserved
;
111 uint16_t gid_reserved
;
112 uint32_t first_inode
;
114 uint16_t block_group_number
;
115 uint32_t feature_compatibility
;
116 uint32_t feature_incompat
;
117 uint32_t feature_ro_compat
;
118 uint32_t unique_id
[4];
119 char volume_name
[16];
120 char last_mounted_on
[64];
121 uint32_t compression_info
;
124 struct ext2_block_group
{
125 __u32 block_id
; /* Blocks bitmap block */
126 __u32 inode_id
; /* Inodes bitmap block */
127 __u32 inode_table_id
; /* Inodes table block */
128 __u16 free_blocks
; /* Free blocks count */
129 __u16 free_inodes
; /* Free inodes count */
130 __u16 used_dir_cnt
; /* Directories count */
132 __u32 bg_reserved
[2];
133 __u16 bg_itable_unused
; /* Unused inodes count */
134 __u16 bg_checksum
; /* crc16(s_uuid+grouo_num+group_desc)*/
137 /* The ext2 inode. */
148 uint32_t blockcnt
; /* Blocks of 512 bytes!! */
153 uint32_t dir_blocks
[INDIRECT_BLOCKS
];
154 uint32_t indir_block
;
155 uint32_t double_indir_block
;
156 uint32_t triple_indir_block
;
163 uint32_t fragment_addr
;
167 /* The header of an ext2 directory entry. */
176 struct ext2_data
*data
;
177 struct ext2_inode inode
;
182 /* Information about a "mounted" ext2 filesystem. */
184 struct ext2_sblock sblock
;
185 struct ext2_inode
*inode
;
186 struct ext2fs_node diropen
;
189 int do_ext2ls(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[]);
190 int do_ext2load(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[]);
191 int do_ext4_load(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
193 int do_ext4_ls(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[]);
194 int do_ext_load(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
196 int do_ext_ls(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[]);