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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. */
Egbert Eich50ce4c02013-05-01 01:13:19 +000052#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \
53 (data->sblock.log2_block_size) \
54 + EXT2_MIN_BLOCK_LOG_SIZE)
Uma Shankara1596432012-05-25 21:21:44 +053055#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. */
68struct 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
106struct 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. */
120struct 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. */
150struct ext2_dirent {
151 uint32_t inode;
152 uint16_t direntlen;
153 uint8_t namelen;
154 uint8_t filetype;
155};
156
157struct 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. */
165struct ext2_data {
166 struct ext2_sblock sblock;
167 struct ext2_inode *inode;
168 struct ext2fs_node diropen;
169};
170
Frederic Leroy04735e92013-06-26 18:11:25 +0200171extern lbaint_t part_offset;
Rob Herring81180812012-08-23 11:31:46 +0000172
Uma Shankara1596432012-05-25 21:21:44 +0530173int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
174int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
175int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
176 char *const argv[]);
177int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
Uma Shankared34f342012-05-25 21:22:49 +0530178int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
179 char *const argv[]);
Uma Shankara1596432012-05-25 21:21:44 +0530180#endif