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Uma Shankara1596432012-05-25 21:21:44 +05301/*
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 *
Wolfgang Denk1a459662013-07-08 09:37:19 +020018 * SPDX-License-Identifier: GPL-2.0+
Uma Shankara1596432012-05-25 21:21:44 +053019 */
20
21#ifndef __EXT_COMMON__
22#define __EXT_COMMON__
23#include <command.h>
24#define SECTOR_SIZE 0x200
Uma Shankara1596432012-05-25 21:21:44 +053025
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
Uma Shankara1596432012-05-25 21:21:44 +053048/* The size of an ext2 block in bytes. */
49#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
50
Uma Shankara1596432012-05-25 21:21:44 +053051/* Log2 size of ext2 block in bytes. */
Michael Walle7f101be2016-08-29 10:46:44 +020052#define LOG2_BLOCK_SIZE(data) (le32_to_cpu \
Egbert Eich50ce4c02013-05-01 01:13:19 +000053 (data->sblock.log2_block_size) \
54 + EXT2_MIN_BLOCK_LOG_SIZE)
Uma Shankara1596432012-05-25 21:21:44 +053055
56#define EXT2_FT_DIR 2
57#define SUCCESS 1
58
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)
64
65/* The ext2 superblock. */
66struct ext2_sblock {
Michael Walle2a0b7a92016-08-29 10:46:43 +020067 __le32 total_inodes;
68 __le32 total_blocks;
69 __le32 reserved_blocks;
70 __le32 free_blocks;
71 __le32 free_inodes;
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;
78 __le32 mtime;
79 __le32 utime;
80 __le16 mnt_count;
81 __le16 max_mnt_count;
82 __le16 magic;
83 __le16 fs_state;
84 __le16 error_handling;
85 __le16 minor_revision_level;
86 __le32 lastcheck;
87 __le32 checkinterval;
88 __le32 creator_os;
89 __le32 revision_level;
90 __le16 uid_reserved;
91 __le16 gid_reserved;
92 __le32 first_inode;
93 __le16 inode_size;
94 __le16 block_group_number;
95 __le32 feature_compatibility;
96 __le32 feature_incompat;
97 __le32 feature_ro_compat;
98 __le32 unique_id[4];
Uma Shankara1596432012-05-25 21:21:44 +053099 char volume_name[16];
100 char last_mounted_on[64];
Michael Walle2a0b7a92016-08-29 10:46:43 +0200101 __le32 compression_info;
Stefan Brüns3ee2f972016-09-17 02:10:06 +0200102 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;
107 __le32 journal_dev;
108 __le32 last_orphan;
109 __le32 hash_seed[4];
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;
115 __le32 mkfs_time;
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;
122 __le32 flags;
123 __le16 raid_stride;
124 __le16 mmp_interval;
125 __le64 mmp_block;
126 __le32 raid_stripe_width;
127 uint8_t log2_groups_per_flex;
128 uint8_t checksum_type;
Uma Shankara1596432012-05-25 21:21:44 +0530129};
130
131struct ext2_block_group {
Michael Walle2a0b7a92016-08-29 10:46:43 +0200132 __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 */
138 __le16 bg_flags;
Stefan Brüns3ee2f972016-09-17 02:10:06 +0200139 __le32 bg_exclude_bitmap;
140 __le16 bg_block_id_csum;
141 __le16 bg_inode_id_csum;
Michael Walle2a0b7a92016-08-29 10:46:43 +0200142 __le16 bg_itable_unused; /* Unused inodes count */
Stefan Brüns3ee2f972016-09-17 02:10:06 +0200143 __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;
155 __le32 bg_reserved;
Uma Shankara1596432012-05-25 21:21:44 +0530156};
157
158/* The ext2 inode. */
159struct ext2_inode {
Michael Walle2a0b7a92016-08-29 10:46:43 +0200160 __le16 mode;
161 __le16 uid;
162 __le32 size;
163 __le32 atime;
164 __le32 ctime;
165 __le32 mtime;
166 __le32 dtime;
167 __le16 gid;
168 __le16 nlinks;
Stefan Brüns3ee2f972016-09-17 02:10:06 +0200169 __le32 blockcnt; /* Blocks of either 512 or block_size bytes */
Michael Walle2a0b7a92016-08-29 10:46:43 +0200170 __le32 flags;
171 __le32 osd1;
Uma Shankara1596432012-05-25 21:21:44 +0530172 union {
173 struct datablocks {
Michael Walle2a0b7a92016-08-29 10:46:43 +0200174 __le32 dir_blocks[INDIRECT_BLOCKS];
175 __le32 indir_block;
176 __le32 double_indir_block;
177 __le32 triple_indir_block;
Uma Shankara1596432012-05-25 21:21:44 +0530178 } blocks;
179 char symlink[60];
Stefan Brüns3ee2f972016-09-17 02:10:06 +0200180 char inline_data[60];
Uma Shankara1596432012-05-25 21:21:44 +0530181 } b;
Michael Walle2a0b7a92016-08-29 10:46:43 +0200182 __le32 version;
183 __le32 acl;
Stefan Brüns3ee2f972016-09-17 02:10:06 +0200184 __le32 size_high; /* previously dir_acl, but never used */
Michael Walle2a0b7a92016-08-29 10:46:43 +0200185 __le32 fragment_addr;
186 __le32 osd2[3];
Uma Shankara1596432012-05-25 21:21:44 +0530187};
188
189/* The header of an ext2 directory entry. */
190struct ext2_dirent {
Michael Walle2a0b7a92016-08-29 10:46:43 +0200191 __le32 inode;
192 __le16 direntlen;
193 __u8 namelen;
194 __u8 filetype;
Uma Shankara1596432012-05-25 21:21:44 +0530195};
196
197struct ext2fs_node {
198 struct ext2_data *data;
199 struct ext2_inode inode;
200 int ino;
201 int inode_read;
202};
203
204/* Information about a "mounted" ext2 filesystem. */
205struct ext2_data {
206 struct ext2_sblock sblock;
207 struct ext2_inode *inode;
208 struct ext2fs_node diropen;
209};
210
Frederic Leroy04735e92013-06-26 18:11:25 +0200211extern lbaint_t part_offset;
Rob Herring81180812012-08-23 11:31:46 +0000212
Uma Shankara1596432012-05-25 21:21:44 +0530213int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
214int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
215int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
216 char *const argv[]);
217int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
Uma Shankared34f342012-05-25 21:22:49 +0530218int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
219 char *const argv[]);
Uma Shankara1596432012-05-25 21:21:44 +0530220#endif