include/ext_common.h

   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 struct cmd_tbl;
  24
  25 #define SECTOR_SIZE             0x200
  26 #define LOG2_SECTOR_SIZE        9
  27
  28 /* Magic value used to identify an ext2 filesystem.  */
  29 #define EXT2_MAGIC                      0xEF53
  30 /* Amount of indirect blocks in an inode.  */
  31 #define INDIRECT_BLOCKS                 12
  32 /* Maximum lenght of a pathname.  */
  33 #define EXT2_PATH_MAX                           4096
  34 /* Maximum nesting of symlinks, used to prevent a loop.  */
  35 #define EXT2_MAX_SYMLINKCNT             8
  36
  37 /* Filetype used in directory entry.  */
  38 #define FILETYPE_UNKNOWN                0
  39 #define FILETYPE_REG                    1
  40 #define FILETYPE_DIRECTORY              2
  41 #define FILETYPE_SYMLINK                7
  42
  43 /* Filetype information as used in inodes.  */
  44 #define FILETYPE_INO_MASK               0170000
  45 #define FILETYPE_INO_REG                0100000
  46 #define FILETYPE_INO_DIRECTORY          0040000
  47 #define FILETYPE_INO_SYMLINK            0120000
  48 #define EXT2_ROOT_INO                   2 /* Root inode */
  49
  50 /* The size of an ext2 block in bytes.  */
  51 #define EXT2_BLOCK_SIZE(data)      (1 << LOG2_BLOCK_SIZE(data))
  52
  53 /* Log2 size of ext2 block in bytes.  */
  54 #define LOG2_BLOCK_SIZE(data)      (le32_to_cpu            \
  55                                     (data->sblock.log2_block_size) \
  56                                     + EXT2_MIN_BLOCK_LOG_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         uint8_t prealloc_blocks;
 105         uint8_t prealloc_dir_blocks;
 106         __le16 reserved_gdt_blocks;
 107         uint8_t journal_uuid[16];
 108         __le32 journal_inode;
 109         __le32 journal_dev;
 110         __le32 last_orphan;
 111         __le32 hash_seed[4];
 112         uint8_t default_hash_version;
 113         uint8_t journal_backup_type;
 114         __le16 descriptor_size;
 115         __le32 default_mount_options;
 116         __le32 first_meta_block_group;
 117         __le32 mkfs_time;
 118         __le32 journal_blocks[17];
 119         __le32 total_blocks_high;
 120         __le32 reserved_blocks_high;
 121         __le32 free_blocks_high;
 122         __le16 min_extra_inode_size;
 123         __le16 want_extra_inode_size;
 124         __le32 flags;
 125         __le16 raid_stride;
 126         __le16 mmp_interval;
 127         __le64 mmp_block;
 128         __le32 raid_stripe_width;
 129         uint8_t log2_groups_per_flex;
 130         uint8_t checksum_type;
 131 };
 132
 133 struct ext2_block_group {
 134         __le32 block_id;        /* Blocks bitmap block */
 135         __le32 inode_id;        /* Inodes bitmap block */
 136         __le32 inode_table_id;  /* Inodes table block */
 137         __le16 free_blocks;     /* Free blocks count */
 138         __le16 free_inodes;     /* Free inodes count */
 139         __le16 used_dir_cnt;    /* Directories count */
 140         __le16 bg_flags;
 141         __le32 bg_exclude_bitmap;
 142         __le16 bg_block_id_csum;
 143         __le16 bg_inode_id_csum;
 144         __le16 bg_itable_unused; /* Unused inodes count */
 145         __le16 bg_checksum;     /* crc16(s_uuid+group_num+group_desc)*/
 146         /* following fields only exist if descriptor size is 64 */
 147         __le32 block_id_high;
 148         __le32 inode_id_high;
 149         __le32 inode_table_id_high;
 150         __le16 free_blocks_high;
 151         __le16 free_inodes_high;
 152         __le16 used_dir_cnt_high;
 153         __le16 bg_itable_unused_high;
 154         __le32 bg_exclude_bitmap_high;
 155         __le16 bg_block_id_csum_high;
 156         __le16 bg_inode_id_csum_high;
 157         __le32 bg_reserved;
 158 };
 159
 160 /* The ext2 inode. */
 161 struct ext2_inode {
 162         __le16 mode;
 163         __le16 uid;
 164         __le32 size;
 165         __le32 atime;
 166         __le32 ctime;
 167         __le32 mtime;
 168         __le32 dtime;
 169         __le16 gid;
 170         __le16 nlinks;
 171         __le32 blockcnt;        /* Blocks of either 512 or block_size bytes */
 172         __le32 flags;
 173         __le32 osd1;
 174         union {
 175                 struct datablocks {
 176                         __le32 dir_blocks[INDIRECT_BLOCKS];
 177                         __le32 indir_block;
 178                         __le32 double_indir_block;
 179                         __le32 triple_indir_block;
 180                 } blocks;
 181                 char symlink[60];
 182                 char inline_data[60];
 183         } b;
 184         __le32 version;
 185         __le32 acl;
 186         __le32 size_high;       /* previously dir_acl, but never used */
 187         __le32 fragment_addr;
 188         __le32 osd2[3];
 189 };
 190
 191 /* The header of an ext2 directory entry. */
 192 struct ext2_dirent {
 193         __le32 inode;
 194         __le16 direntlen;
 195         __u8 namelen;
 196         __u8 filetype;
 197 };
 198
 199 struct ext2fs_node {
 200         struct ext2_data *data;
 201         struct ext2_inode inode;
 202         int ino;
 203         int inode_read;
 204 };
 205
 206 /* Information about a "mounted" ext2 filesystem. */
 207 struct ext2_data {
 208         struct ext2_sblock sblock;
 209         struct ext2_inode *inode;
 210         struct ext2fs_node diropen;
 211 };
 212
 213 extern lbaint_t part_offset;
 214
 215 int do_ext2ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 216 int do_ext2load(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 217 int do_ext4_load(struct cmd_tbl *cmdtp, int flag, int argc,
 218                  char *const argv[]);
 219 int do_ext4_ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 220 int do_ext4_write(struct cmd_tbl *cmdtp, int flag, int argc,
 221                   char *const argv[]);
 222 #endif