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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 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 */
32
33#ifndef __EXT_COMMON__
34#define __EXT_COMMON__
35#include <command.h>
36#define SECTOR_SIZE 0x200
37#define SECTOR_BITS 9
38
39/* Magic value used to identify an ext2 filesystem. */
40#define EXT2_MAGIC 0xEF53
41/* Amount of indirect blocks in an inode. */
42#define INDIRECT_BLOCKS 12
43/* Maximum lenght of a pathname. */
44#define EXT2_PATH_MAX 4096
45/* Maximum nesting of symlinks, used to prevent a loop. */
46#define EXT2_MAX_SYMLINKCNT 8
47
48/* Filetype used in directory entry. */
49#define FILETYPE_UNKNOWN 0
50#define FILETYPE_REG 1
51#define FILETYPE_DIRECTORY 2
52#define FILETYPE_SYMLINK 7
53
54/* Filetype information as used in inodes. */
55#define FILETYPE_INO_MASK 0170000
56#define FILETYPE_INO_REG 0100000
57#define FILETYPE_INO_DIRECTORY 0040000
58#define FILETYPE_INO_SYMLINK 0120000
59#define EXT2_ROOT_INO 2 /* Root inode */
60
61/* Bits used as offset in sector */
62#define DISK_SECTOR_BITS 9
63/* The size of an ext2 block in bytes. */
64#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
65
66/* Log2 size of ext2 block in 512 blocks. */
67#define LOG2_EXT2_BLOCK_SIZE(data) (__le32_to_cpu \
68 (data->sblock.log2_block_size) + 1)
69
70/* Log2 size of ext2 block in bytes. */
71#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \
72 (data->sblock.log2_block_size) + 10)
73#define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \
74 (data->sblock.inode_size))
75
76#define EXT2_FT_DIR 2
77#define SUCCESS 1
78
79/* Macro-instructions used to manage several block sizes */
80#define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */
81#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */
82#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE)
83#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE)
84
85/* The ext2 superblock. */
86struct ext2_sblock {
87 uint32_t total_inodes;
88 uint32_t total_blocks;
89 uint32_t reserved_blocks;
90 uint32_t free_blocks;
91 uint32_t free_inodes;
92 uint32_t first_data_block;
93 uint32_t log2_block_size;
94 uint32_t log2_fragment_size;
95 uint32_t blocks_per_group;
96 uint32_t fragments_per_group;
97 uint32_t inodes_per_group;
98 uint32_t mtime;
99 uint32_t utime;
100 uint16_t mnt_count;
101 uint16_t max_mnt_count;
102 uint16_t magic;
103 uint16_t fs_state;
104 uint16_t error_handling;
105 uint16_t minor_revision_level;
106 uint32_t lastcheck;
107 uint32_t checkinterval;
108 uint32_t creator_os;
109 uint32_t revision_level;
110 uint16_t uid_reserved;
111 uint16_t gid_reserved;
112 uint32_t first_inode;
113 uint16_t inode_size;
114 uint16_t block_group_number;
115 uint32_t feature_compatibility;
116 uint32_t feature_incompat;
117 uint32_t feature_ro_compat;
118 uint32_t unique_id[4];
119 char volume_name[16];
120 char last_mounted_on[64];
121 uint32_t compression_info;
122};
123
124struct ext2_block_group {
125 __u32 block_id; /* Blocks bitmap block */
126 __u32 inode_id; /* Inodes bitmap block */
127 __u32 inode_table_id; /* Inodes table block */
128 __u16 free_blocks; /* Free blocks count */
129 __u16 free_inodes; /* Free inodes count */
130 __u16 used_dir_cnt; /* Directories count */
131 __u16 bg_flags;
132 __u32 bg_reserved[2];
133 __u16 bg_itable_unused; /* Unused inodes count */
134 __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/
135};
136
137/* The ext2 inode. */
138struct ext2_inode {
139 uint16_t mode;
140 uint16_t uid;
141 uint32_t size;
142 uint32_t atime;
143 uint32_t ctime;
144 uint32_t mtime;
145 uint32_t dtime;
146 uint16_t gid;
147 uint16_t nlinks;
148 uint32_t blockcnt; /* Blocks of 512 bytes!! */
149 uint32_t flags;
150 uint32_t osd1;
151 union {
152 struct datablocks {
153 uint32_t dir_blocks[INDIRECT_BLOCKS];
154 uint32_t indir_block;
155 uint32_t double_indir_block;
156 uint32_t triple_indir_block;
157 } blocks;
158 char symlink[60];
159 } b;
160 uint32_t version;
161 uint32_t acl;
162 uint32_t dir_acl;
163 uint32_t fragment_addr;
164 uint32_t osd2[3];
165};
166
167/* The header of an ext2 directory entry. */
168struct ext2_dirent {
169 uint32_t inode;
170 uint16_t direntlen;
171 uint8_t namelen;
172 uint8_t filetype;
173};
174
175struct ext2fs_node {
176 struct ext2_data *data;
177 struct ext2_inode inode;
178 int ino;
179 int inode_read;
180};
181
182/* Information about a "mounted" ext2 filesystem. */
183struct ext2_data {
184 struct ext2_sblock sblock;
185 struct ext2_inode *inode;
186 struct ext2fs_node diropen;
187};
188
Rob Herring81180812012-08-23 11:31:46 +0000189extern unsigned long part_offset;
190
Uma Shankara1596432012-05-25 21:21:44 +0530191int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
192int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
193int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
194 char *const argv[]);
195int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
Uma Shankared34f342012-05-25 21:22:49 +0530196int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
197 char *const argv[]);
Uma Shankara1596432012-05-25 21:21:44 +0530198#endif