1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * (C) Copyright 2011 - 2012 Samsung Electronics
4 * EXT4 filesystem implementation in Uboot by
5 * Uma Shankar <uma.shankar@samsung.com>
6 * Manjunatha C Achar <a.manjunatha@samsung.com>
8 * Data structures and headers for ext4 support have been taken from
9 * ext2 ls load support in Uboot
12 * esd gmbh <www.esd-electronics.com>
13 * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
15 * based on code from grub2 fs/ext2.c and fs/fshelp.c by
16 * GRUB -- GRand Unified Bootloader
17 * Copyright (C) 2003, 2004 Free Software Foundation, Inc.
20 #ifndef __EXT_COMMON__
21 #define __EXT_COMMON__
27 #define SECTOR_SIZE 0x200
28 #define LOG2_SECTOR_SIZE 9
30 /* Magic value used to identify an ext2 filesystem. */
31 #define EXT2_MAGIC 0xEF53
32 /* Amount of indirect blocks in an inode. */
33 #define INDIRECT_BLOCKS 12
34 /* Maximum lenght of a pathname. */
35 #define EXT2_PATH_MAX 4096
36 /* Maximum nesting of symlinks, used to prevent a loop. */
37 #define EXT2_MAX_SYMLINKCNT 8
39 /* Filetype used in directory entry. */
40 #define FILETYPE_UNKNOWN 0
41 #define FILETYPE_REG 1
42 #define FILETYPE_DIRECTORY 2
43 #define FILETYPE_SYMLINK 7
45 /* Filetype information as used in inodes. */
46 #define FILETYPE_INO_MASK 0170000
47 #define FILETYPE_INO_REG 0100000
48 #define FILETYPE_INO_DIRECTORY 0040000
49 #define FILETYPE_INO_SYMLINK 0120000
50 #define EXT2_ROOT_INO 2 /* Root inode */
52 /* The size of an ext2 block in bytes. */
53 #define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
55 /* Log2 size of ext2 block in bytes. */
56 #define LOG2_BLOCK_SIZE(data) (le32_to_cpu \
57 (data->sblock.log2_block_size) \
58 + EXT2_MIN_BLOCK_LOG_SIZE)
63 /* Macro-instructions used to manage several block sizes */
64 #define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */
65 #define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */
66 #define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE)
67 #define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE)
69 /* The ext2 superblock. */
73 __le32 reserved_blocks;
76 __le32 first_data_block;
77 __le32 log2_block_size;
78 __le32 log2_fragment_size;
79 __le32 blocks_per_group;
80 __le32 fragments_per_group;
81 __le32 inodes_per_group;
88 __le16 error_handling;
89 __le16 minor_revision_level;
93 __le32 revision_level;
98 __le16 block_group_number;
99 __le32 feature_compatibility;
100 __le32 feature_incompat;
101 __le32 feature_ro_compat;
103 char volume_name[16];
104 char last_mounted_on[64];
105 __le32 compression_info;
106 uint8_t prealloc_blocks;
107 uint8_t prealloc_dir_blocks;
108 __le16 reserved_gdt_blocks;
109 uint8_t journal_uuid[16];
110 __le32 journal_inode;
114 uint8_t default_hash_version;
115 uint8_t journal_backup_type;
116 __le16 descriptor_size;
117 __le32 default_mount_options;
118 __le32 first_meta_block_group;
120 __le32 journal_blocks[17];
121 __le32 total_blocks_high;
122 __le32 reserved_blocks_high;
123 __le32 free_blocks_high;
124 __le16 min_extra_inode_size;
125 __le16 want_extra_inode_size;
130 __le32 raid_stripe_width;
131 uint8_t log2_groups_per_flex;
132 uint8_t checksum_type;
135 struct ext2_block_group {
136 __le32 block_id; /* Blocks bitmap block */
137 __le32 inode_id; /* Inodes bitmap block */
138 __le32 inode_table_id; /* Inodes table block */
139 __le16 free_blocks; /* Free blocks count */
140 __le16 free_inodes; /* Free inodes count */
141 __le16 used_dir_cnt; /* Directories count */
143 __le32 bg_exclude_bitmap;
144 __le16 bg_block_id_csum;
145 __le16 bg_inode_id_csum;
146 __le16 bg_itable_unused; /* Unused inodes count */
147 __le16 bg_checksum; /* crc16(s_uuid+group_num+group_desc)*/
148 /* following fields only exist if descriptor size is 64 */
149 __le32 block_id_high;
150 __le32 inode_id_high;
151 __le32 inode_table_id_high;
152 __le16 free_blocks_high;
153 __le16 free_inodes_high;
154 __le16 used_dir_cnt_high;
155 __le16 bg_itable_unused_high;
156 __le32 bg_exclude_bitmap_high;
157 __le16 bg_block_id_csum_high;
158 __le16 bg_inode_id_csum_high;
162 /* The ext2 inode. */
173 __le32 blockcnt; /* Blocks of either 512 or block_size bytes */
178 __le32 dir_blocks[INDIRECT_BLOCKS];
180 __le32 double_indir_block;
181 __le32 triple_indir_block;
184 char inline_data[60];
188 __le32 size_high; /* previously dir_acl, but never used */
189 __le32 fragment_addr;
193 /* The header of an ext2 directory entry. */
202 struct ext2_data *data;
203 struct ext2_inode inode;
208 /* Information about a "mounted" ext2 filesystem. */
210 struct ext2_sblock sblock;
211 struct ext2_inode *inode;
212 struct ext2fs_node diropen;
215 extern lbaint_t part_offset;
217 int do_ext2ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
218 int do_ext2load(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
219 int do_ext4_load(struct cmd_tbl *cmdtp, int flag, int argc,
221 int do_ext4_ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
222 int do_ext4_write(struct cmd_tbl *cmdtp, int flag, int argc,