1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* (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.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __EXT_COMMON__
#define __EXT_COMMON__
#include <command.h>
#define SECTOR_SIZE 0x200
/* 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 */
/* The size of an ext2 block in bytes. */
#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
/* Log2 size of ext2 block in bytes. */
#define LOG2_BLOCK_SIZE(data) (le32_to_cpu \
(data->sblock.log2_block_size) \
+ EXT2_MIN_BLOCK_LOG_SIZE)
#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 {
__le32 total_inodes;
__le32 total_blocks;
__le32 reserved_blocks;
__le32 free_blocks;
__le32 free_inodes;
__le32 first_data_block;
__le32 log2_block_size;
__le32 log2_fragment_size;
__le32 blocks_per_group;
__le32 fragments_per_group;
__le32 inodes_per_group;
__le32 mtime;
__le32 utime;
__le16 mnt_count;
__le16 max_mnt_count;
__le16 magic;
__le16 fs_state;
__le16 error_handling;
__le16 minor_revision_level;
__le32 lastcheck;
__le32 checkinterval;
__le32 creator_os;
__le32 revision_level;
__le16 uid_reserved;
__le16 gid_reserved;
__le32 first_inode;
__le16 inode_size;
__le16 block_group_number;
__le32 feature_compatibility;
__le32 feature_incompat;
__le32 feature_ro_compat;
__le32 unique_id[4];
char volume_name[16];
char last_mounted_on[64];
__le32 compression_info;
};
struct ext2_block_group {
__le32 block_id; /* Blocks bitmap block */
__le32 inode_id; /* Inodes bitmap block */
__le32 inode_table_id; /* Inodes table block */
__le16 free_blocks; /* Free blocks count */
__le16 free_inodes; /* Free inodes count */
__le16 used_dir_cnt; /* Directories count */
__le16 bg_flags;
__le32 bg_reserved[2];
__le16 bg_itable_unused; /* Unused inodes count */
__le16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/
};
/* The ext2 inode. */
struct ext2_inode {
__le16 mode;
__le16 uid;
__le32 size;
__le32 atime;
__le32 ctime;
__le32 mtime;
__le32 dtime;
__le16 gid;
__le16 nlinks;
__le32 blockcnt; /* Blocks of 512 bytes!! */
__le32 flags;
__le32 osd1;
union {
struct datablocks {
__le32 dir_blocks[INDIRECT_BLOCKS];
__le32 indir_block;
__le32 double_indir_block;
__le32 triple_indir_block;
} blocks;
char symlink[60];
} b;
__le32 version;
__le32 acl;
__le32 dir_acl;
__le32 fragment_addr;
__le32 osd2[3];
};
/* The header of an ext2 directory entry. */
struct ext2_dirent {
__le32 inode;
__le16 direntlen;
__u8 namelen;
__u8 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 lbaint_t 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
|
