LXR uboot/include/ext

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