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 #include <command.h> 23 #define SECTOR_SIZE 0x200 24 #define LOG2_SECTOR_SIZE 9 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 56 #define EXT2_FT_DIR 2 57 #define SUCCESS 1 58 59 /* Macro-instructions used to manage several block sizes */ 60 #define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ 61 #define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ 62 #define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) 63 #define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) 64 65 /* The ext2 superblock. */ 66 struct ext2_sblock { 67 __le32 total_inodes; 68 __le32 total_blocks; 69 __le32 reserved_blocks; 70 __le32 free_blocks; 71 __le32 free_inodes; 72 __le32 first_data_block; 73 __le32 log2_block_size; 74 __le32 log2_fragment_size; 75 __le32 blocks_per_group; 76 __le32 fragments_per_group; 77 __le32 inodes_per_group; 78 __le32 mtime; 79 __le32 utime; 80 __le16 mnt_count; 81 __le16 max_mnt_count; 82 __le16 magic; 83 __le16 fs_state; 84 __le16 error_handling; 85 __le16 minor_revision_level; 86 __le32 lastcheck; 87 __le32 checkinterval; 88 __le32 creator_os; 89 __le32 revision_level; 90 __le16 uid_reserved; 91 __le16 gid_reserved; 92 __le32 first_inode; 93 __le16 inode_size; 94 __le16 block_group_number; 95 __le32 feature_compatibility; 96 __le32 feature_incompat; 97 __le32 feature_ro_compat; 98 __le32 unique_id[4]; 99 char volume_name[16]; 100 char last_mounted_on[64]; 101 __le32 compression_info; 102 uint8_t prealloc_blocks; 103 uint8_t prealloc_dir_blocks; 104 __le16 reserved_gdt_blocks; 105 uint8_t journal_uuid[16]; 106 __le32 journal_inode; 107 __le32 journal_dev; 108 __le32 last_orphan; 109 __le32 hash_seed[4]; 110 uint8_t default_hash_version; 111 uint8_t journal_backup_type; 112 __le16 descriptor_size; 113 __le32 default_mount_options; 114 __le32 first_meta_block_group; 115 __le32 mkfs_time; 116 __le32 journal_blocks[17]; 117 __le32 total_blocks_high; 118 __le32 reserved_blocks_high; 119 __le32 free_blocks_high; 120 __le16 min_extra_inode_size; 121 __le16 want_extra_inode_size; 122 __le32 flags; 123 __le16 raid_stride; 124 __le16 mmp_interval; 125 __le64 mmp_block; 126 __le32 raid_stripe_width; 127 uint8_t log2_groups_per_flex; 128 uint8_t checksum_type; 129 }; 130 131 struct ext2_block_group { 132 __le32 block_id; /* Blocks bitmap block */ 133 __le32 inode_id; /* Inodes bitmap block */ 134 __le32 inode_table_id; /* Inodes table block */ 135 __le16 free_blocks; /* Free blocks count */ 136 __le16 free_inodes; /* Free inodes count */ 137 __le16 used_dir_cnt; /* Directories count */ 138 __le16 bg_flags; 139 __le32 bg_exclude_bitmap; 140 __le16 bg_block_id_csum; 141 __le16 bg_inode_id_csum; 142 __le16 bg_itable_unused; /* Unused inodes count */ 143 __le16 bg_checksum; /* crc16(s_uuid+group_num+group_desc)*/ 144 /* following fields only exist if descriptor size is 64 */ 145 __le32 block_id_high; 146 __le32 inode_id_high; 147 __le32 inode_table_id_high; 148 __le16 free_blocks_high; 149 __le16 free_inodes_high; 150 __le16 used_dir_cnt_high; 151 __le16 bg_itable_unused_high; 152 __le32 bg_exclude_bitmap_high; 153 __le16 bg_block_id_csum_high; 154 __le16 bg_inode_id_csum_high; 155 __le32 bg_reserved; 156 }; 157 158 /* The ext2 inode. */ 159 struct ext2_inode { 160 __le16 mode; 161 __le16 uid; 162 __le32 size; 163 __le32 atime; 164 __le32 ctime; 165 __le32 mtime; 166 __le32 dtime; 167 __le16 gid; 168 __le16 nlinks; 169 __le32 blockcnt; /* Blocks of either 512 or block_size bytes */ 170 __le32 flags; 171 __le32 osd1; 172 union { 173 struct datablocks { 174 __le32 dir_blocks[INDIRECT_BLOCKS]; 175 __le32 indir_block; 176 __le32 double_indir_block; 177 __le32 triple_indir_block; 178 } blocks; 179 char symlink[60]; 180 char inline_data[60]; 181 } b; 182 __le32 version; 183 __le32 acl; 184 __le32 size_high; /* previously dir_acl, but never used */ 185 __le32 fragment_addr; 186 __le32 osd2[3]; 187 }; 188 189 /* The header of an ext2 directory entry. */ 190 struct ext2_dirent { 191 __le32 inode; 192 __le16 direntlen; 193 __u8 namelen; 194 __u8 filetype; 195 }; 196 197 struct ext2fs_node { 198 struct ext2_data *data; 199 struct ext2_inode inode; 200 int ino; 201 int inode_read; 202 }; 203 204 /* Information about a "mounted" ext2 filesystem. */ 205 struct ext2_data { 206 struct ext2_sblock sblock; 207 struct ext2_inode *inode; 208 struct ext2fs_node diropen; 209 }; 210 211 extern lbaint_t part_offset; 212 213 int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 214 int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 215 int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc, 216 char *const argv[]); 217 int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); 218 int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc, 219 char *const argv[]); 220 #endif 221