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 * SPDX-License-Identifier: GPL-2.0+
21 #ifndef __EXT_COMMON__
22 #define __EXT_COMMON__
24 #define SECTOR_SIZE 0x200
26 /* Magic value used to identify an ext2 filesystem. */
27 #define EXT2_MAGIC 0xEF53
28 /* Amount of indirect blocks in an inode. */
29 #define INDIRECT_BLOCKS 12
30 /* Maximum lenght of a pathname. */
31 #define EXT2_PATH_MAX 4096
32 /* Maximum nesting of symlinks, used to prevent a loop. */
33 #define EXT2_MAX_SYMLINKCNT 8
35 /* Filetype used in directory entry. */
36 #define FILETYPE_UNKNOWN 0
37 #define FILETYPE_REG 1
38 #define FILETYPE_DIRECTORY 2
39 #define FILETYPE_SYMLINK 7
41 /* Filetype information as used in inodes. */
42 #define FILETYPE_INO_MASK 0170000
43 #define FILETYPE_INO_REG 0100000
44 #define FILETYPE_INO_DIRECTORY 0040000
45 #define FILETYPE_INO_SYMLINK 0120000
46 #define EXT2_ROOT_INO 2 /* Root inode */
48 /* The size of an ext2 block in bytes. */
49 #define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
51 /* Log2 size of ext2 block in bytes. */
52 #define LOG2_BLOCK_SIZE(data) (le32_to_cpu \
53 (data->sblock.log2_block_size) \
54 + EXT2_MIN_BLOCK_LOG_SIZE)
59 /* Macro-instructions used to manage several block sizes */
60 #define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */
61 #define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */
62 #define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE)
63 #define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE)
65 /* The ext2 superblock. */
69 __le32 reserved_blocks
;
72 __le32 first_data_block
;
73 __le32 log2_block_size
;
74 __le32 log2_fragment_size
;
75 __le32 blocks_per_group
;
76 __le32 fragments_per_group
;
77 __le32 inodes_per_group
;
84 __le16 error_handling
;
85 __le16 minor_revision_level
;
89 __le32 revision_level
;
94 __le16 block_group_number
;
95 __le32 feature_compatibility
;
96 __le32 feature_incompat
;
97 __le32 feature_ro_compat
;
100 char last_mounted_on
[64];
101 __le32 compression_info
;
102 uint8_t prealloc_blocks
;
103 uint8_t prealloc_dir_blocks
;
104 __le16 reserved_gdt_blocks
;
105 uint8_t journal_uuid
[16];
106 __le32 journal_inode
;
110 uint8_t default_hash_version
;
111 uint8_t journal_backup_type
;
112 __le16 descriptor_size
;
113 __le32 default_mount_options
;
114 __le32 first_meta_block_group
;
116 __le32 journal_blocks
[17];
117 __le32 total_blocks_high
;
118 __le32 reserved_blocks_high
;
119 __le32 free_blocks_high
;
120 __le16 min_extra_inode_size
;
121 __le16 want_extra_inode_size
;
126 __le32 raid_stripe_width
;
127 uint8_t log2_groups_per_flex
;
128 uint8_t checksum_type
;
131 struct ext2_block_group
{
132 __le32 block_id
; /* Blocks bitmap block */
133 __le32 inode_id
; /* Inodes bitmap block */
134 __le32 inode_table_id
; /* Inodes table block */
135 __le16 free_blocks
; /* Free blocks count */
136 __le16 free_inodes
; /* Free inodes count */
137 __le16 used_dir_cnt
; /* Directories count */
139 __le32 bg_exclude_bitmap
;
140 __le16 bg_block_id_csum
;
141 __le16 bg_inode_id_csum
;
142 __le16 bg_itable_unused
; /* Unused inodes count */
143 __le16 bg_checksum
; /* crc16(s_uuid+group_num+group_desc)*/
144 /* following fields only exist if descriptor size is 64 */
145 __le32 block_id_high
;
146 __le32 inode_id_high
;
147 __le32 inode_table_id_high
;
148 __le16 free_blocks_high
;
149 __le16 free_inodes_high
;
150 __le16 used_dir_cnt_high
;
151 __le16 bg_itable_unused_high
;
152 __le32 bg_exclude_bitmap_high
;
153 __le16 bg_block_id_csum_high
;
154 __le16 bg_inode_id_csum_high
;
158 /* The ext2 inode. */
169 __le32 blockcnt
; /* Blocks of either 512 or block_size bytes */
174 __le32 dir_blocks
[INDIRECT_BLOCKS
];
176 __le32 double_indir_block
;
177 __le32 triple_indir_block
;
180 char inline_data
[60];
184 __le32 size_high
; /* previously dir_acl, but never used */
185 __le32 fragment_addr
;
189 /* The header of an ext2 directory entry. */
198 struct ext2_data
*data
;
199 struct ext2_inode inode
;
204 /* Information about a "mounted" ext2 filesystem. */
206 struct ext2_sblock sblock
;
207 struct ext2_inode
*inode
;
208 struct ext2fs_node diropen
;
211 extern lbaint_t part_offset
;
213 int do_ext2ls(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[]);
214 int do_ext2load(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[]);
215 int do_ext4_load(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
217 int do_ext4_ls(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *const argv
[]);
218 int do_ext4_write(cmd_tbl_t
*cmdtp
, int flag
, int argc
,