1 /* 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 * SPDX-License-Identifier: GPL-2.0+ 19 */ 20 21 #ifndef __EXT_COMMON__ 22 #define __EXT_COMMON__ 23 #include <command.h> 24 #define SECTOR_SIZE 0x200 25 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 48 /* The size of an ext2 block in bytes. */ 49 #define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) 50 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) 55 #define INODE_SIZE_FILESYSTEM(data) (le16_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. */ 68 struct ext2_sblock { 69 __le32 total_inodes; 70 __le32 total_blocks; 71 __le32 reserved_blocks; 72 __le32 free_blocks; 73 __le32 free_inodes; 74 __le32 first_data_block; 75 __le32 log2_block_size; 76 __le32 log2_fragment_size; 77 __le32 blocks_per_group; 78 __le32 fragments_per_group; 79 __le32 inodes_per_group; 80 __le32 mtime; 81 __le32 utime; 82 __le16 mnt_count; 83 __le16 max_mnt_count; 84 __le16 magic; 85 __le16 fs_state; 86 __le16 error_handling; 87 __le16 minor_revision_level; 88 __le32 lastcheck; 89 __le32 checkinterval; 90 __le32 creator_os; 91 __le32 revision_level; 92 __le16 uid_reserved; 93 __le16 gid_reserved; 94 __le32 first_inode; 95 __le16 inode_size; 96 __le16 block_group_number; 97 __le32 feature_compatibility; 98 __le32 feature_incompat; 99 __le32 feature_ro_compat; 100 __le32 unique_id[4]; 101 char volume_name[16]; 102 char last_mounted_on[64]; 103 __le32 compression_info; 104 }; 105 106 struct ext2_block_group { 107 __le32 block_id; /* Blocks bitmap block */ 108 __le32 inode_id; /* Inodes bitmap block */ 109 __le32 inode_table_id; /* Inodes table block */ 110 __le16 free_blocks; /* Free blocks count */ 111 __le16 free_inodes; /* Free inodes count */ 112 __le16 used_dir_cnt; /* Directories count */ 113 __le16 bg_flags; 114 __le32 bg_reserved[2]; 115 __le16 bg_itable_unused; /* Unused inodes count */ 116 __le16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ 117 }; 118 119 /* The ext2 inode. */ 120 struct ext2_inode { 121 __le16 mode; 122 __le16 uid; 123 __le32 size; 124 __le32 atime; 125 __le32 ctime; 126 __le32 mtime; 127 __le32 dtime; 128 __le16 gid; 129 __le16 nlinks; 130 __le32 blockcnt; /* Blocks of 512 bytes!! */ 131 __le32 flags; 132 __le32 osd1; 133 union { 134 struct datablocks { 135 __le32 dir_blocks[INDIRECT_BLOCKS]; 136 __le32 indir_block; 137 __le32 double_indir_block; 138 __le32 triple_indir_block; 139 } blocks; 140 char symlink[60]; 141 } b; 142 __le32 version; 143 __le32 acl; 144 __le32 dir_acl; 145 __le32 fragment_addr; 146 __le32 osd2[3]; 147 }; 148 149 /* The header of an ext2 directory entry. */ 150 struct ext2_dirent { 151 __le32 inode; 152 __le16 direntlen; 153 __u8 namelen; 154 __u8 filetype; 155 }; 156 157 struct 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. */ 165 struct ext2_data { 166 struct ext2_sblock sblock; 167 struct ext2_inode *inode; 168 struct ext2fs_node diropen; 169 }; 170 171 extern lbaint_t part_offset; 172 173 int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 174 int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 175 int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc, 176 char *const argv[]); 177 int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); 178 int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc, 179 char *const argv[]); 180 #endif 181