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,