blob: 6cddf166d947a0b92a1bd6a76f3b6a0e168995eb
1 | /* |
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> |
6 | * |
7 | * Data structures and headers for ext4 support have been taken from |
8 | * ext2 ls load support in Uboot |
9 | * |
10 | * (C) Copyright 2004 |
11 | * esd gmbh <www.esd-electronics.com> |
12 | * Reinhard Arlt <reinhard.arlt@esd-electronics.com> |
13 | * |
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. |
17 | * |
18 | * SPDX-License-Identifier: GPL-2.0+ |
19 | */ |
20 | |
21 | #ifndef __EXT_COMMON__ |
22 | #define __EXT_COMMON__ |
23 | #include <command.h> |
24 | #define SECTOR_SIZE 0x200 |
25 | |
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 |
34 | |
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 |
40 | |
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 */ |
47 | |
48 | /* The size of an ext2 block in bytes. */ |
49 | #define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) |
50 | |
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) |
55 | #define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \ |
56 | (data->sblock.inode_size)) |
57 | |
58 | #define EXT2_FT_DIR 2 |
59 | #define SUCCESS 1 |
60 | |
61 | /* Macro-instructions used to manage several block sizes */ |
62 | #define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ |
63 | #define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ |
64 | #define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) |
65 | #define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) |
66 | |
67 | /* The ext2 superblock. */ |
68 | struct ext2_sblock { |
69 | uint32_t total_inodes; |
70 | uint32_t total_blocks; |
71 | uint32_t reserved_blocks; |
72 | uint32_t free_blocks; |
73 | uint32_t free_inodes; |
74 | uint32_t first_data_block; |
75 | uint32_t log2_block_size; |
76 | uint32_t log2_fragment_size; |
77 | uint32_t blocks_per_group; |
78 | uint32_t fragments_per_group; |
79 | uint32_t inodes_per_group; |
80 | uint32_t mtime; |
81 | uint32_t utime; |
82 | uint16_t mnt_count; |
83 | uint16_t max_mnt_count; |
84 | uint16_t magic; |
85 | uint16_t fs_state; |
86 | uint16_t error_handling; |
87 | uint16_t minor_revision_level; |
88 | uint32_t lastcheck; |
89 | uint32_t checkinterval; |
90 | uint32_t creator_os; |
91 | uint32_t revision_level; |
92 | uint16_t uid_reserved; |
93 | uint16_t gid_reserved; |
94 | uint32_t first_inode; |
95 | uint16_t inode_size; |
96 | uint16_t block_group_number; |
97 | uint32_t feature_compatibility; |
98 | uint32_t feature_incompat; |
99 | uint32_t feature_ro_compat; |
100 | uint32_t unique_id[4]; |
101 | char volume_name[16]; |
102 | char last_mounted_on[64]; |
103 | uint32_t compression_info; |
104 | }; |
105 | |
106 | struct ext2_block_group { |
107 | __u32 block_id; /* Blocks bitmap block */ |
108 | __u32 inode_id; /* Inodes bitmap block */ |
109 | __u32 inode_table_id; /* Inodes table block */ |
110 | __u16 free_blocks; /* Free blocks count */ |
111 | __u16 free_inodes; /* Free inodes count */ |
112 | __u16 used_dir_cnt; /* Directories count */ |
113 | __u16 bg_flags; |
114 | __u32 bg_reserved[2]; |
115 | __u16 bg_itable_unused; /* Unused inodes count */ |
116 | __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ |
117 | }; |
118 | |
119 | /* The ext2 inode. */ |
120 | struct ext2_inode { |
121 | uint16_t mode; |
122 | uint16_t uid; |
123 | uint32_t size; |
124 | uint32_t atime; |
125 | uint32_t ctime; |
126 | uint32_t mtime; |
127 | uint32_t dtime; |
128 | uint16_t gid; |
129 | uint16_t nlinks; |
130 | uint32_t blockcnt; /* Blocks of 512 bytes!! */ |
131 | uint32_t flags; |
132 | uint32_t osd1; |
133 | union { |
134 | struct datablocks { |
135 | uint32_t dir_blocks[INDIRECT_BLOCKS]; |
136 | uint32_t indir_block; |
137 | uint32_t double_indir_block; |
138 | uint32_t triple_indir_block; |
139 | } blocks; |
140 | char symlink[60]; |
141 | } b; |
142 | uint32_t version; |
143 | uint32_t acl; |
144 | uint32_t dir_acl; |
145 | uint32_t fragment_addr; |
146 | uint32_t osd2[3]; |
147 | }; |
148 | |
149 | /* The header of an ext2 directory entry. */ |
150 | struct ext2_dirent { |
151 | uint32_t inode; |
152 | uint16_t direntlen; |
153 | uint8_t namelen; |
154 | uint8_t filetype; |
155 | }; |
156 | |
157 | struct ext2fs_node { |
158 | struct ext2_data *data; |
159 | struct ext2_inode inode; |
160 | int ino; |
161 | int inode_read; |
162 | }; |
163 | |
164 | /* Information about a "mounted" ext2 filesystem. */ |
165 | struct ext2_data { |
166 | struct ext2_sblock sblock; |
167 | struct ext2_inode *inode; |
168 | struct ext2fs_node diropen; |
169 | }; |
170 | |
171 | extern lbaint_t part_offset; |
172 | |
173 | int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); |
174 | int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); |
175 | int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc, |
176 | char *const argv[]); |
177 | int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); |
178 | int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc, |
179 | char *const argv[]); |
180 | #endif |
181 |