LXR uboot/include/ext

   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)     (__le32_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.  */
  68struct ext2_sblock {
  69        uint32_t total_inodes;
  70        uint32_t total_blocks;
  71        uint32_t reserved_blocks;
  72        uint32_t free_blocks;
  73        uint32_t free_inodes;
  74        uint32_t first_data_block;
  75        uint32_t log2_block_size;
  76        uint32_t log2_fragment_size;
  77        uint32_t blocks_per_group;
  78        uint32_t fragments_per_group;
  79        uint32_t inodes_per_group;
  80        uint32_t mtime;
  81        uint32_t utime;
  82        uint16_t mnt_count;
  83        uint16_t max_mnt_count;
  84        uint16_t magic;
  85        uint16_t fs_state;
  86        uint16_t error_handling;
  87        uint16_t minor_revision_level;
  88        uint32_t lastcheck;
  89        uint32_t checkinterval;
  90        uint32_t creator_os;
  91        uint32_t revision_level;
  92        uint16_t uid_reserved;
  93        uint16_t gid_reserved;
  94        uint32_t first_inode;
  95        uint16_t inode_size;
  96        uint16_t block_group_number;
  97        uint32_t feature_compatibility;
  98        uint32_t feature_incompat;
  99        uint32_t feature_ro_compat;
 100        uint32_t unique_id[4];
 101        char volume_name[16];
 102        char last_mounted_on[64];
 103        uint32_t compression_info;
 104};
 105
 106struct ext2_block_group {
 107        __u32 block_id; /* Blocks bitmap block */
 108        __u32 inode_id; /* Inodes bitmap block */
 109        __u32 inode_table_id;   /* Inodes table block */
 110        __u16 free_blocks;      /* Free blocks count */
 111        __u16 free_inodes;      /* Free inodes count */
 112        __u16 used_dir_cnt;     /* Directories count */
 113        __u16 bg_flags;
 114        __u32 bg_reserved[2];
 115        __u16 bg_itable_unused; /* Unused inodes count */
 116        __u16 bg_checksum;      /* crc16(s_uuid+grouo_num+group_desc)*/
 117};
 118
 119/* The ext2 inode. */
 120struct ext2_inode {
 121        uint16_t mode;
 122        uint16_t uid;
 123        uint32_t size;
 124        uint32_t atime;
 125        uint32_t ctime;
 126        uint32_t mtime;
 127        uint32_t dtime;
 128        uint16_t gid;
 129        uint16_t nlinks;
 130        uint32_t blockcnt;      /* Blocks of 512 bytes!! */
 131        uint32_t flags;
 132        uint32_t osd1;
 133        union {
 134                struct datablocks {
 135                        uint32_t dir_blocks[INDIRECT_BLOCKS];
 136                        uint32_t indir_block;
 137                        uint32_t double_indir_block;
 138                        uint32_t triple_indir_block;
 139                } blocks;
 140                char symlink[60];
 141        } b;
 142        uint32_t version;
 143        uint32_t acl;
 144        uint32_t dir_acl;
 145        uint32_t fragment_addr;
 146        uint32_t osd2[3];
 147};
 148
 149/* The header of an ext2 directory entry. */
 150struct ext2_dirent {
 151        uint32_t inode;
 152        uint16_t direntlen;
 153        uint8_t namelen;
 154        uint8_t filetype;
 155};
 156
 157struct 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. */
 165struct ext2_data {
 166        struct ext2_sblock sblock;
 167        struct ext2_inode *inode;
 168        struct ext2fs_node diropen;
 169};
 170
 171extern lbaint_t part_offset;
 172
 173int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 174int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 175int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
 176                                        char *const argv[]);
 177int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
 178int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
 179                                char *const argv[]);
 180#endif
 181