1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2011 - 2012 Samsung Electronics 4 * EXT4 filesystem implementation in Uboot by 5 * Uma Shankar <uma.shankar@samsung.com> 6 * Manjunatha C Achar <a.manjunatha@samsung.com> 7 * 8 * Data structures and headers for ext4 support have been taken from 9 * ext2 ls load support in Uboot 10 * 11 * (C) Copyright 2004 12 * esd gmbh <www.esd-electronics.com> 13 * Reinhard Arlt <reinhard.arlt@esd-electronics.com> 14 * 15 * based on code from grub2 fs/ext2.c and fs/fshelp.c by 16 * GRUB -- GRand Unified Bootloader 17 * Copyright (C) 2003, 2004 Free Software Foundation, Inc. 18 */ 19 20 #ifndef __EXT_COMMON__ 21 #define __EXT_COMMON__ 22 23 #include <compiler.h> 24 25 struct cmd_tbl; 26 27 #define SECTOR_SIZE 0x200 28 #define LOG2_SECTOR_SIZE 9 29 30 /* Magic value used to identify an ext2 filesystem. */ 31 #define EXT2_MAGIC 0xEF53 32 /* Amount of indirect blocks in an inode. */ 33 #define INDIRECT_BLOCKS 12 34 /* Maximum lenght of a pathname. */ 35 #define EXT2_PATH_MAX 4096 36 /* Maximum nesting of symlinks, used to prevent a loop. */ 37 #define EXT2_MAX_SYMLINKCNT 8 38 39 /* Filetype used in directory entry. */ 40 #define FILETYPE_UNKNOWN 0 41 #define FILETYPE_REG 1 42 #define FILETYPE_DIRECTORY 2 43 #define FILETYPE_SYMLINK 7 44 45 /* Filetype information as used in inodes. */ 46 #define FILETYPE_INO_MASK 0170000 47 #define FILETYPE_INO_REG 0100000 48 #define FILETYPE_INO_DIRECTORY 0040000 49 #define FILETYPE_INO_SYMLINK 0120000 50 #define EXT2_ROOT_INO 2 /* Root inode */ 51 52 /* The size of an ext2 block in bytes. */ 53 #define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) 54 55 /* Log2 size of ext2 block in bytes. */ 56 #define LOG2_BLOCK_SIZE(data) (le32_to_cpu \ 57 (data->sblock.log2_block_size) \ 58 + EXT2_MIN_BLOCK_LOG_SIZE) 59 60 #define EXT2_FT_DIR 2 61 #define SUCCESS 1 62 63 /* Macro-instructions used to manage several block sizes */ 64 #define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ 65 #define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ 66 #define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) 67 #define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) 68 69 /* The ext2 superblock. */ 70 struct ext2_sblock { 71 __le32 total_inodes; 72 __le32 total_blocks; 73 __le32 reserved_blocks; 74 __le32 free_blocks; 75 __le32 free_inodes; 76 __le32 first_data_block; 77 __le32 log2_block_size; 78 __le32 log2_fragment_size; 79 __le32 blocks_per_group; 80 __le32 fragments_per_group; 81 __le32 inodes_per_group; 82 __le32 mtime; 83 __le32 utime; 84 __le16 mnt_count; 85 __le16 max_mnt_count; 86 __le16 magic; 87 __le16 fs_state; 88 __le16 error_handling; 89 __le16 minor_revision_level; 90 __le32 lastcheck; 91 __le32 checkinterval; 92 __le32 creator_os; 93 __le32 revision_level; 94 __le16 uid_reserved; 95 __le16 gid_reserved; 96 __le32 first_inode; 97 __le16 inode_size; 98 __le16 block_group_number; 99 __le32 feature_compatibility; 100 __le32 feature_incompat; 101 __le32 feature_ro_compat; 102 __le32 unique_id[4]; 103 char volume_name[16]; 104 char last_mounted_on[64]; 105 __le32 compression_info; 106 uint8_t prealloc_blocks; 107 uint8_t prealloc_dir_blocks; 108 __le16 reserved_gdt_blocks; 109 uint8_t journal_uuid[16]; 110 __le32 journal_inode; 111 __le32 journal_dev; 112 __le32 last_orphan; 113 __le32 hash_seed[4]; 114 uint8_t default_hash_version; 115 uint8_t journal_backup_type; 116 __le16 descriptor_size; 117 __le32 default_mount_options; 118 __le32 first_meta_block_group; 119 __le32 mkfs_time; 120 __le32 journal_blocks[17]; 121 __le32 total_blocks_high; 122 __le32 reserved_blocks_high; 123 __le32 free_blocks_high; 124 __le16 min_extra_inode_size; 125 __le16 want_extra_inode_size; 126 __le32 flags; 127 __le16 raid_stride; 128 __le16 mmp_interval; 129 __le64 mmp_block; 130 __le32 raid_stripe_width; 131 uint8_t log2_groups_per_flex; 132 uint8_t checksum_type; 133 }; 134 135 struct ext2_block_group { 136 __le32 block_id; /* Blocks bitmap block */ 137 __le32 inode_id; /* Inodes bitmap block */ 138 __le32 inode_table_id; /* Inodes table block */ 139 __le16 free_blocks; /* Free blocks count */ 140 __le16 free_inodes; /* Free inodes count */ 141 __le16 used_dir_cnt; /* Directories count */ 142 __le16 bg_flags; 143 __le32 bg_exclude_bitmap; 144 __le16 bg_block_id_csum; 145 __le16 bg_inode_id_csum; 146 __le16 bg_itable_unused; /* Unused inodes count */ 147 __le16 bg_checksum; /* crc16(s_uuid+group_num+group_desc)*/ 148 /* following fields only exist if descriptor size is 64 */ 149 __le32 block_id_high; 150 __le32 inode_id_high; 151 __le32 inode_table_id_high; 152 __le16 free_blocks_high; 153 __le16 free_inodes_high; 154 __le16 used_dir_cnt_high; 155 __le16 bg_itable_unused_high; 156 __le32 bg_exclude_bitmap_high; 157 __le16 bg_block_id_csum_high; 158 __le16 bg_inode_id_csum_high; 159 __le32 bg_reserved; 160 }; 161 162 /* The ext2 inode. */ 163 struct ext2_inode { 164 __le16 mode; 165 __le16 uid; 166 __le32 size; 167 __le32 atime; 168 __le32 ctime; 169 __le32 mtime; 170 __le32 dtime; 171 __le16 gid; 172 __le16 nlinks; 173 __le32 blockcnt; /* Blocks of either 512 or block_size bytes */ 174 __le32 flags; 175 __le32 osd1; 176 union { 177 struct datablocks { 178 __le32 dir_blocks[INDIRECT_BLOCKS]; 179 __le32 indir_block; 180 __le32 double_indir_block; 181 __le32 triple_indir_block; 182 } blocks; 183 char symlink[60]; 184 char inline_data[60]; 185 } b; 186 __le32 version; 187 __le32 acl; 188 __le32 size_high; /* previously dir_acl, but never used */ 189 __le32 fragment_addr; 190 __le32 osd2[3]; 191 }; 192 193 /* The header of an ext2 directory entry. */ 194 struct ext2_dirent { 195 __le32 inode; 196 __le16 direntlen; 197 __u8 namelen; 198 __u8 filetype; 199 }; 200 201 struct ext2fs_node { 202 struct ext2_data *data; 203 struct ext2_inode inode; 204 int ino; 205 int inode_read; 206 }; 207 208 /* Information about a "mounted" ext2 filesystem. */ 209 struct ext2_data { 210 struct ext2_sblock sblock; 211 struct ext2_inode *inode; 212 struct ext2fs_node diropen; 213 }; 214 215 extern lbaint_t part_offset; 216 217 int do_ext2ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); 218 int do_ext2load(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); 219 int do_ext4_load(struct cmd_tbl *cmdtp, int flag, int argc, 220 char *const argv[]); 221 int do_ext4_ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); 222 int do_ext4_write(struct cmd_tbl *cmdtp, int flag, int argc, 223 char *const argv[]); 224 #endif 225