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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
Uma Shankara1596432012-05-25 21:21:44 +053037
38/* Magic value used to identify an ext2 filesystem. */
39#define EXT2_MAGIC 0xEF53
40/* Amount of indirect blocks in an inode. */
41#define INDIRECT_BLOCKS 12
42/* Maximum lenght of a pathname. */
43#define EXT2_PATH_MAX 4096
44/* Maximum nesting of symlinks, used to prevent a loop. */
45#define EXT2_MAX_SYMLINKCNT 8
46
47/* Filetype used in directory entry. */
48#define FILETYPE_UNKNOWN 0
49#define FILETYPE_REG 1
50#define FILETYPE_DIRECTORY 2
51#define FILETYPE_SYMLINK 7
52
53/* Filetype information as used in inodes. */
54#define FILETYPE_INO_MASK 0170000
55#define FILETYPE_INO_REG 0100000
56#define FILETYPE_INO_DIRECTORY 0040000
57#define FILETYPE_INO_SYMLINK 0120000
58#define EXT2_ROOT_INO 2 /* Root inode */
59
Uma Shankara1596432012-05-25 21:21:44 +053060/* The size of an ext2 block in bytes. */
61#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
62
Uma Shankara1596432012-05-25 21:21:44 +053063/* Log2 size of ext2 block in bytes. */
Egbert Eich50ce4c02013-05-01 01:13:19 +000064#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \
65 (data->sblock.log2_block_size) \
66 + EXT2_MIN_BLOCK_LOG_SIZE)
Uma Shankara1596432012-05-25 21:21:44 +053067#define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \
68 (data->sblock.inode_size))
69
70#define EXT2_FT_DIR 2
71#define SUCCESS 1
72
73/* Macro-instructions used to manage several block sizes */
74#define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */
75#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */
76#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE)
77#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE)
78
79/* The ext2 superblock. */
80struct ext2_sblock {
81 uint32_t total_inodes;
82 uint32_t total_blocks;
83 uint32_t reserved_blocks;
84 uint32_t free_blocks;
85 uint32_t free_inodes;
86 uint32_t first_data_block;
87 uint32_t log2_block_size;
88 uint32_t log2_fragment_size;
89 uint32_t blocks_per_group;
90 uint32_t fragments_per_group;
91 uint32_t inodes_per_group;
92 uint32_t mtime;
93 uint32_t utime;
94 uint16_t mnt_count;
95 uint16_t max_mnt_count;
96 uint16_t magic;
97 uint16_t fs_state;
98 uint16_t error_handling;
99 uint16_t minor_revision_level;
100 uint32_t lastcheck;
101 uint32_t checkinterval;
102 uint32_t creator_os;
103 uint32_t revision_level;
104 uint16_t uid_reserved;
105 uint16_t gid_reserved;
106 uint32_t first_inode;
107 uint16_t inode_size;
108 uint16_t block_group_number;
109 uint32_t feature_compatibility;
110 uint32_t feature_incompat;
111 uint32_t feature_ro_compat;
112 uint32_t unique_id[4];
113 char volume_name[16];
114 char last_mounted_on[64];
115 uint32_t compression_info;
116};
117
118struct ext2_block_group {
119 __u32 block_id; /* Blocks bitmap block */
120 __u32 inode_id; /* Inodes bitmap block */
121 __u32 inode_table_id; /* Inodes table block */
122 __u16 free_blocks; /* Free blocks count */
123 __u16 free_inodes; /* Free inodes count */
124 __u16 used_dir_cnt; /* Directories count */
125 __u16 bg_flags;
126 __u32 bg_reserved[2];
127 __u16 bg_itable_unused; /* Unused inodes count */
128 __u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/
129};
130
131/* The ext2 inode. */
132struct ext2_inode {
133 uint16_t mode;
134 uint16_t uid;
135 uint32_t size;
136 uint32_t atime;
137 uint32_t ctime;
138 uint32_t mtime;
139 uint32_t dtime;
140 uint16_t gid;
141 uint16_t nlinks;
142 uint32_t blockcnt; /* Blocks of 512 bytes!! */
143 uint32_t flags;
144 uint32_t osd1;
145 union {
146 struct datablocks {
147 uint32_t dir_blocks[INDIRECT_BLOCKS];
148 uint32_t indir_block;
149 uint32_t double_indir_block;
150 uint32_t triple_indir_block;
151 } blocks;
152 char symlink[60];
153 } b;
154 uint32_t version;
155 uint32_t acl;
156 uint32_t dir_acl;
157 uint32_t fragment_addr;
158 uint32_t osd2[3];
159};
160
161/* The header of an ext2 directory entry. */
162struct ext2_dirent {
163 uint32_t inode;
164 uint16_t direntlen;
165 uint8_t namelen;
166 uint8_t filetype;
167};
168
169struct ext2fs_node {
170 struct ext2_data *data;
171 struct ext2_inode inode;
172 int ino;
173 int inode_read;
174};
175
176/* Information about a "mounted" ext2 filesystem. */
177struct ext2_data {
178 struct ext2_sblock sblock;
179 struct ext2_inode *inode;
180 struct ext2fs_node diropen;
181};
182
Rob Herring81180812012-08-23 11:31:46 +0000183extern unsigned long part_offset;
184
Uma Shankara1596432012-05-25 21:21:44 +0530185int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
186int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
187int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
188 char *const argv[]);
189int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
Uma Shankared34f342012-05-25 21:22:49 +0530190int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
191 char *const argv[]);
Uma Shankara1596432012-05-25 21:21:44 +0530192#endif