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      1 /****************************************************************************
      2  ****************************************************************************
      3  ***
      4  ***   This header was automatically generated from a Linux kernel header
      5  ***   of the same name, to make information necessary for userspace to
      6  ***   call into the kernel available to libc.  It contains only constants,
      7  ***   structures, and macros generated from the original header, and thus,
      8  ***   contains no copyrightable information.
      9  ***
     10  ****************************************************************************
     11  ****************************************************************************/
     12 #ifndef _EXT4_H
     13 #define _EXT4_H
     14 
     15 #include <sys/types.h>
     16 
     17 #undef EXT4FS_DEBUG
     18 
     19 #ifdef EXT4FS_DEBUG
     20 #define ext4_debug(f, a...)   do {   printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:",   __FILE__, __LINE__, __func__);   printk(KERN_DEBUG f, ## a);   } while (0)
     21 #else
     22 #define ext4_debug(f, a...) do {} while (0)
     23 #endif
     24 
     25 #define EXT4_ERROR_INODE(inode, fmt, a...)   ext4_error_inode(__func__, (inode), (fmt), ## a);
     26 
     27 #define EXT4_ERROR_FILE(file, fmt, a...)   ext4_error_file(__func__, (file), (fmt), ## a);
     28 
     29 typedef int ext4_grpblk_t;
     30 
     31 typedef unsigned long long ext4_fsblk_t;
     32 
     33 typedef __u32 ext4_lblk_t;
     34 
     35 typedef unsigned int ext4_group_t;
     36 
     37 #define EXT4_MB_HINT_MERGE 0x0001
     38 
     39 #define EXT4_MB_HINT_RESERVED 0x0002
     40 
     41 #define EXT4_MB_HINT_METADATA 0x0004
     42 
     43 #define EXT4_MB_HINT_FIRST 0x0008
     44 
     45 #define EXT4_MB_HINT_BEST 0x0010
     46 
     47 #define EXT4_MB_HINT_DATA 0x0020
     48 
     49 #define EXT4_MB_HINT_NOPREALLOC 0x0040
     50 
     51 #define EXT4_MB_HINT_GROUP_ALLOC 0x0080
     52 
     53 #define EXT4_MB_HINT_GOAL_ONLY 0x0100
     54 
     55 #define EXT4_MB_HINT_TRY_GOAL 0x0200
     56 
     57 #define EXT4_MB_DELALLOC_RESERVED 0x0400
     58 
     59 #define EXT4_MB_STREAM_ALLOC 0x0800
     60 
     61 struct ext4_allocation_request {
     62 
     63  struct inode *inode;
     64 
     65  unsigned int len;
     66 
     67  ext4_lblk_t logical;
     68 
     69  ext4_lblk_t lleft;
     70 
     71  ext4_lblk_t lright;
     72 
     73  ext4_fsblk_t goal;
     74 
     75  ext4_fsblk_t pleft;
     76 
     77  ext4_fsblk_t pright;
     78 
     79  unsigned int flags;
     80 };
     81 
     82 #define EXT4_BAD_INO 1
     83 #define EXT4_ROOT_INO 2
     84 #define EXT4_BOOT_LOADER_INO 5
     85 #define EXT4_UNDEL_DIR_INO 6
     86 #define EXT4_RESIZE_INO 7
     87 #define EXT4_JOURNAL_INO 8
     88 
     89 #define EXT4_GOOD_OLD_FIRST_INO 11
     90 
     91 #define EXT4_LINK_MAX 65000
     92 
     93 #define EXT4_MIN_BLOCK_SIZE 1024
     94 #define EXT4_MAX_BLOCK_SIZE 65536
     95 #define EXT4_MIN_BLOCK_LOG_SIZE 10
     96 #define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
     97 #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32))
     98 #define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
     99 #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ?   EXT4_GOOD_OLD_INODE_SIZE :   (s)->s_inode_size)
    100 #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ?   EXT4_GOOD_OLD_FIRST_INO :   (s)->s_first_ino)
    101 #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits)))
    102 
    103 struct ext4_group_desc
    104 {
    105  __le32 bg_block_bitmap_lo;
    106  __le32 bg_inode_bitmap_lo;
    107  __le32 bg_inode_table_lo;
    108  __le16 bg_free_blocks_count_lo;
    109  __le16 bg_free_inodes_count_lo;
    110  __le16 bg_used_dirs_count_lo;
    111  __le16 bg_flags;
    112  __u32 bg_reserved[2];
    113  __le16 bg_itable_unused_lo;
    114  __le16 bg_checksum;
    115  __le32 bg_block_bitmap_hi;
    116  __le32 bg_inode_bitmap_hi;
    117  __le32 bg_inode_table_hi;
    118  __le16 bg_free_blocks_count_hi;
    119  __le16 bg_free_inodes_count_hi;
    120  __le16 bg_used_dirs_count_hi;
    121  __le16 bg_itable_unused_hi;
    122  __u32 bg_reserved2[3];
    123 };
    124 
    125 #define EXT4_BG_INODE_UNINIT 0x0001
    126 #define EXT4_BG_BLOCK_UNINIT 0x0002
    127 #define EXT4_BG_INODE_ZEROED 0x0004
    128 
    129 #define EXT4_MIN_DESC_SIZE 32
    130 #define EXT4_MIN_DESC_SIZE_64BIT 64
    131 #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE
    132 #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size)
    133 #define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
    134 #define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))
    135 #define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
    136 
    137 #define EXT4_NDIR_BLOCKS 12
    138 #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS
    139 #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1)
    140 #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1)
    141 #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1)
    142 
    143 #define EXT4_SECRM_FL 0x00000001
    144 #define EXT4_UNRM_FL 0x00000002
    145 #define EXT4_COMPR_FL 0x00000004
    146 #define EXT4_SYNC_FL 0x00000008
    147 #define EXT4_IMMUTABLE_FL 0x00000010
    148 #define EXT4_APPEND_FL 0x00000020
    149 #define EXT4_NODUMP_FL 0x00000040
    150 #define EXT4_NOATIME_FL 0x00000080
    151 
    152 #define EXT4_DIRTY_FL 0x00000100
    153 #define EXT4_COMPRBLK_FL 0x00000200
    154 #define EXT4_NOCOMPR_FL 0x00000400
    155 #define EXT4_ECOMPR_FL 0x00000800
    156 
    157 #define EXT4_INDEX_FL 0x00001000
    158 #define EXT4_IMAGIC_FL 0x00002000
    159 #define EXT4_JOURNAL_DATA_FL 0x00004000
    160 #define EXT4_NOTAIL_FL 0x00008000
    161 #define EXT4_DIRSYNC_FL 0x00010000
    162 #define EXT4_TOPDIR_FL 0x00020000
    163 #define EXT4_HUGE_FILE_FL 0x00040000
    164 #define EXT4_EXTENTS_FL 0x00080000
    165 #define EXT4_EA_INODE_FL 0x00200000
    166 #define EXT4_EOFBLOCKS_FL 0x00400000
    167 #define EXT4_RESERVED_FL 0x80000000
    168 
    169 #define EXT4_FL_USER_VISIBLE 0x004BDFFF
    170 #define EXT4_FL_USER_MODIFIABLE 0x004B80FF
    171 
    172 #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |  EXT4_SYNC_FL | EXT4_IMMUTABLE_FL | EXT4_APPEND_FL |  EXT4_NODUMP_FL | EXT4_NOATIME_FL |  EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |  EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL)
    173 
    174 #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL))
    175 
    176 #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
    177 
    178 struct ext4_new_group_data {
    179  __u32 group;
    180  __u64 block_bitmap;
    181  __u64 inode_bitmap;
    182  __u64 inode_table;
    183  __u32 blocks_count;
    184  __u16 reserved_blocks;
    185  __u16 unused;
    186  __u32 free_blocks_count;
    187 };
    188 
    189 #define EXT4_GET_BLOCKS_CREATE 0x0001
    190 
    191 #define EXT4_GET_BLOCKS_UNINIT_EXT 0x0002
    192 #define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT (EXT4_GET_BLOCKS_UNINIT_EXT|  EXT4_GET_BLOCKS_CREATE)
    193 
    194 #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004
    195 
    196 #define EXT4_GET_BLOCKS_PRE_IO 0x0008
    197 #define EXT4_GET_BLOCKS_CONVERT 0x0010
    198 #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|  EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
    199 
    200 #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|  EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
    201 
    202 #define EXT4_FREE_BLOCKS_METADATA 0x0001
    203 #define EXT4_FREE_BLOCKS_FORGET 0x0002
    204 #define EXT4_FREE_BLOCKS_VALIDATED 0x0004
    205 
    206 #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS
    207 #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS
    208 #define EXT4_IOC_GETVERSION _IOR('f', 3, long)
    209 #define EXT4_IOC_SETVERSION _IOW('f', 4, long)
    210 #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION
    211 #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION
    212 #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long)
    213 #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long)
    214 #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
    215 #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input)
    216 #define EXT4_IOC_MIGRATE _IO('f', 9)
    217 
    218 #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12)
    219 #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent)
    220 
    221 #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS
    222 #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS
    223 #define EXT4_IOC32_GETVERSION _IOR('f', 3, int)
    224 #define EXT4_IOC32_SETVERSION _IOW('f', 4, int)
    225 #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int)
    226 #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int)
    227 #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
    228 #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
    229 #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
    230 
    231 #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF
    232 
    233 struct ext4_inode {
    234  __le16 i_mode;
    235  __le16 i_uid;
    236  __le32 i_size_lo;
    237  __le32 i_atime;
    238  __le32 i_ctime;
    239  __le32 i_mtime;
    240  __le32 i_dtime;
    241  __le16 i_gid;
    242  __le16 i_links_count;
    243  __le32 i_blocks_lo;
    244  __le32 i_flags;
    245  union {
    246  struct {
    247  __le32 l_i_version;
    248  } linux1;
    249  struct {
    250  __u32 h_i_translator;
    251  } hurd1;
    252  struct {
    253  __u32 m_i_reserved1;
    254  } masix1;
    255  } osd1;
    256  __le32 i_block[EXT4_N_BLOCKS];
    257  __le32 i_generation;
    258  __le32 i_file_acl_lo;
    259  __le32 i_size_high;
    260  __le32 i_obso_faddr;
    261  union {
    262  struct {
    263  __le16 l_i_blocks_high;
    264  __le16 l_i_file_acl_high;
    265  __le16 l_i_uid_high;
    266  __le16 l_i_gid_high;
    267  __u32 l_i_reserved2;
    268  } linux2;
    269  struct {
    270  __le16 h_i_reserved1;
    271  __u16 h_i_mode_high;
    272  __u16 h_i_uid_high;
    273  __u16 h_i_gid_high;
    274  __u32 h_i_author;
    275  } hurd2;
    276  struct {
    277  __le16 h_i_reserved1;
    278  __le16 m_i_file_acl_high;
    279  __u32 m_i_reserved2[2];
    280  } masix2;
    281  } osd2;
    282  __le16 i_extra_isize;
    283  __le16 i_pad1;
    284  __le32 i_ctime_extra;
    285  __le32 i_mtime_extra;
    286  __le32 i_atime_extra;
    287  __le32 i_crtime;
    288  __le32 i_crtime_extra;
    289  __le32 i_version_hi;
    290 };
    291 
    292 struct move_extent {
    293  __u32 reserved;
    294  __u32 donor_fd;
    295  __u64 orig_start;
    296  __u64 donor_start;
    297  __u64 len;
    298  __u64 moved_len;
    299 };
    300 
    301 #define EXT4_EPOCH_BITS 2
    302 #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
    303 #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS)
    304 
    305 #define EXT4_FITS_IN_INODE(ext4_inode, einode, field)   ((offsetof(typeof(*ext4_inode), field) +   sizeof((ext4_inode)->field))   <= (EXT4_GOOD_OLD_INODE_SIZE +   (einode)->i_extra_isize))
    306 #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode)  do {   (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec);   if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra))   (raw_inode)->xtime ## _extra =   ext4_encode_extra_time(&(inode)->xtime);  } while (0)
    307 #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode)  do {   if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime))   (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec);   if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra))   (raw_inode)->xtime ## _extra =   ext4_encode_extra_time(&(einode)->xtime);  } while (0)
    308 #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode)  do {   (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime);   if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra))   ext4_decode_extra_time(&(inode)->xtime,   raw_inode->xtime ## _extra);  } while (0)
    309 #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode)  do {   if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime))   (einode)->xtime.tv_sec =   (signed)le32_to_cpu((raw_inode)->xtime);   if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra))   ext4_decode_extra_time(&(einode)->xtime,   raw_inode->xtime ## _extra);  } while (0)
    310 #define i_disk_version osd1.linux1.l_i_version
    311 
    312 #define i_reserved1 osd1.linux1.l_i_reserved1
    313 #define i_file_acl_high osd2.linux2.l_i_file_acl_high
    314 #define i_blocks_high osd2.linux2.l_i_blocks_high
    315 #define i_uid_low i_uid
    316 #define i_gid_low i_gid
    317 #define i_uid_high osd2.linux2.l_i_uid_high
    318 #define i_gid_high osd2.linux2.l_i_gid_high
    319 #define i_reserved2 osd2.linux2.l_i_reserved2
    320 
    321 #define EXT4_VALID_FS 0x0001
    322 #define EXT4_ERROR_FS 0x0002
    323 #define EXT4_ORPHAN_FS 0x0004
    324 
    325 #define EXT2_FLAGS_SIGNED_HASH 0x0001
    326 #define EXT2_FLAGS_UNSIGNED_HASH 0x0002
    327 #define EXT2_FLAGS_TEST_FILESYS 0x0004
    328 
    329 #define EXT4_MOUNT_OLDALLOC 0x00002
    330 #define EXT4_MOUNT_GRPID 0x00004
    331 #define EXT4_MOUNT_DEBUG 0x00008
    332 #define EXT4_MOUNT_ERRORS_CONT 0x00010
    333 #define EXT4_MOUNT_ERRORS_RO 0x00020
    334 #define EXT4_MOUNT_ERRORS_PANIC 0x00040
    335 #define EXT4_MOUNT_MINIX_DF 0x00080
    336 #define EXT4_MOUNT_NOLOAD 0x00100
    337 #define EXT4_MOUNT_DATA_FLAGS 0x00C00
    338 #define EXT4_MOUNT_JOURNAL_DATA 0x00400
    339 #define EXT4_MOUNT_ORDERED_DATA 0x00800
    340 #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00
    341 #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000
    342 #define EXT4_MOUNT_NO_UID32 0x02000
    343 #define EXT4_MOUNT_XATTR_USER 0x04000
    344 #define EXT4_MOUNT_POSIX_ACL 0x08000
    345 #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000
    346 #define EXT4_MOUNT_BARRIER 0x20000
    347 #define EXT4_MOUNT_NOBH 0x40000
    348 #define EXT4_MOUNT_QUOTA 0x80000
    349 #define EXT4_MOUNT_USRQUOTA 0x100000
    350 #define EXT4_MOUNT_GRPQUOTA 0x200000
    351 #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000
    352 #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000
    353 #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000
    354 #define EXT4_MOUNT_I_VERSION 0x2000000
    355 #define EXT4_MOUNT_DELALLOC 0x8000000
    356 #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000
    357 #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000
    358 #define EXT4_MOUNT_DISCARD 0x40000000
    359 
    360 #define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt
    361 #define set_opt(o, opt) o |= EXT4_MOUNT_##opt
    362 #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt &   EXT4_MOUNT_##opt)
    363 
    364 #define ext4_set_bit ext2_set_bit
    365 #define ext4_set_bit_atomic ext2_set_bit_atomic
    366 #define ext4_clear_bit ext2_clear_bit
    367 #define ext4_clear_bit_atomic ext2_clear_bit_atomic
    368 #define ext4_test_bit ext2_test_bit
    369 #define ext4_find_first_zero_bit ext2_find_first_zero_bit
    370 #define ext4_find_next_zero_bit ext2_find_next_zero_bit
    371 #define ext4_find_next_bit ext2_find_next_bit
    372 
    373 #define EXT4_DFL_MAX_MNT_COUNT 20
    374 #define EXT4_DFL_CHECKINTERVAL 0
    375 
    376 #define EXT4_ERRORS_CONTINUE 1
    377 #define EXT4_ERRORS_RO 2
    378 #define EXT4_ERRORS_PANIC 3
    379 #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
    380 
    381 struct ext4_super_block {
    382   __le32 s_inodes_count;
    383  __le32 s_blocks_count_lo;
    384  __le32 s_r_blocks_count_lo;
    385  __le32 s_free_blocks_count_lo;
    386   __le32 s_free_inodes_count;
    387  __le32 s_first_data_block;
    388  __le32 s_log_block_size;
    389  __le32 s_obso_log_frag_size;
    390   __le32 s_blocks_per_group;
    391  __le32 s_obso_frags_per_group;
    392  __le32 s_inodes_per_group;
    393  __le32 s_mtime;
    394   __le32 s_wtime;
    395  __le16 s_mnt_count;
    396  __le16 s_max_mnt_count;
    397  __le16 s_magic;
    398  __le16 s_state;
    399  __le16 s_errors;
    400  __le16 s_minor_rev_level;
    401   __le32 s_lastcheck;
    402  __le32 s_checkinterval;
    403  __le32 s_creator_os;
    404  __le32 s_rev_level;
    405   __le16 s_def_resuid;
    406  __le16 s_def_resgid;
    407 
    408  __le32 s_first_ino;
    409  __le16 s_inode_size;
    410  __le16 s_block_group_nr;
    411  __le32 s_feature_compat;
    412   __le32 s_feature_incompat;
    413  __le32 s_feature_ro_compat;
    414   __u8 s_uuid[16];
    415   char s_volume_name[16];
    416   char s_last_mounted[64];
    417   __le32 s_algorithm_usage_bitmap;
    418 
    419  __u8 s_prealloc_blocks;
    420  __u8 s_prealloc_dir_blocks;
    421  __le16 s_reserved_gdt_blocks;
    422 
    423   __u8 s_journal_uuid[16];
    424   __le32 s_journal_inum;
    425  __le32 s_journal_dev;
    426  __le32 s_last_orphan;
    427  __le32 s_hash_seed[4];
    428  __u8 s_def_hash_version;
    429  __u8 s_reserved_char_pad;
    430  __le16 s_desc_size;
    431   __le32 s_default_mount_opts;
    432  __le32 s_first_meta_bg;
    433  __le32 s_mkfs_time;
    434  __le32 s_jnl_blocks[17];
    435 
    436   __le32 s_blocks_count_hi;
    437  __le32 s_r_blocks_count_hi;
    438  __le32 s_free_blocks_count_hi;
    439  __le16 s_min_extra_isize;
    440  __le16 s_want_extra_isize;
    441  __le32 s_flags;
    442  __le16 s_raid_stride;
    443  __le16 s_mmp_interval;
    444  __le64 s_mmp_block;
    445  __le32 s_raid_stripe_width;
    446  __u8 s_log_groups_per_flex;
    447  __u8 s_reserved_char_pad2;
    448  __le16 s_reserved_pad;
    449  __le64 s_kbytes_written;
    450  __u32 s_reserved[160];
    451 };
    452 
    453 #define EXT4_SB(sb) (sb)
    454 
    455 #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
    456 
    457 #define EXT4_OS_LINUX 0
    458 #define EXT4_OS_HURD 1
    459 #define EXT4_OS_MASIX 2
    460 #define EXT4_OS_FREEBSD 3
    461 #define EXT4_OS_LITES 4
    462 
    463 #define EXT4_GOOD_OLD_REV 0
    464 #define EXT4_DYNAMIC_REV 1
    465 
    466 #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV
    467 #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV
    468 
    469 #define EXT4_GOOD_OLD_INODE_SIZE 128
    470 
    471 #define EXT4_HAS_COMPAT_FEATURE(sb,mask)   ((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0)
    472 #define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask)   ((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0)
    473 #define EXT4_HAS_INCOMPAT_FEATURE(sb,mask)   ((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0)
    474 #define EXT4_SET_COMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
    475 #define EXT4_SET_RO_COMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
    476 #define EXT4_SET_INCOMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
    477 #define EXT4_CLEAR_COMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
    478 #define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
    479 #define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
    480 
    481 #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
    482 #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
    483 #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
    484 #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
    485 #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
    486 #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
    487 
    488 #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
    489 #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
    490 #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
    491 #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
    492 #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
    493 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
    494 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
    495 
    496 #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
    497 #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
    498 #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004
    499 #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
    500 #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
    501 #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040
    502 #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
    503 #define EXT4_FEATURE_INCOMPAT_MMP 0x0100
    504 #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
    505 #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400
    506 #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000
    507 
    508 #define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
    509 #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE|   EXT4_FEATURE_INCOMPAT_RECOVER|   EXT4_FEATURE_INCOMPAT_META_BG|   EXT4_FEATURE_INCOMPAT_EXTENTS|   EXT4_FEATURE_INCOMPAT_64BIT|   EXT4_FEATURE_INCOMPAT_FLEX_BG)
    510 #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER|   EXT4_FEATURE_RO_COMPAT_LARGE_FILE|   EXT4_FEATURE_RO_COMPAT_GDT_CSUM|   EXT4_FEATURE_RO_COMPAT_DIR_NLINK |   EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE |   EXT4_FEATURE_RO_COMPAT_BTREE_DIR |  EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
    511 
    512 #define EXT4_DEF_RESUID 0
    513 #define EXT4_DEF_RESGID 0
    514 
    515 #define EXT4_DEF_INODE_READAHEAD_BLKS 32
    516 
    517 #define EXT4_DEFM_DEBUG 0x0001
    518 #define EXT4_DEFM_BSDGROUPS 0x0002
    519 #define EXT4_DEFM_XATTR_USER 0x0004
    520 #define EXT4_DEFM_ACL 0x0008
    521 #define EXT4_DEFM_UID16 0x0010
    522 #define EXT4_DEFM_JMODE 0x0060
    523 #define EXT4_DEFM_JMODE_DATA 0x0020
    524 #define EXT4_DEFM_JMODE_ORDERED 0x0040
    525 #define EXT4_DEFM_JMODE_WBACK 0x0060
    526 
    527 #define EXT4_DEF_MIN_BATCH_TIME 0
    528 #define EXT4_DEF_MAX_BATCH_TIME 15000
    529 
    530 #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4
    531 
    532 #define EXT4_NAME_LEN 255
    533 
    534 struct ext4_dir_entry {
    535  __le32 inode;
    536  __le16 rec_len;
    537  __le16 name_len;
    538  char name[EXT4_NAME_LEN];
    539 };
    540 
    541 struct ext4_dir_entry_2 {
    542  __le32 inode;
    543  __le16 rec_len;
    544  __u8 name_len;
    545  __u8 file_type;
    546  char name[EXT4_NAME_LEN];
    547 };
    548 
    549 #define EXT4_FT_UNKNOWN 0
    550 #define EXT4_FT_REG_FILE 1
    551 #define EXT4_FT_DIR 2
    552 #define EXT4_FT_CHRDEV 3
    553 #define EXT4_FT_BLKDEV 4
    554 #define EXT4_FT_FIFO 5
    555 #define EXT4_FT_SOCK 6
    556 #define EXT4_FT_SYMLINK 7
    557 
    558 #define EXT4_FT_MAX 8
    559 
    560 #define EXT4_DIR_PAD 4
    561 #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
    562 #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) &   ~EXT4_DIR_ROUND)
    563 #define EXT4_MAX_REC_LEN ((1<<16)-1)
    564 
    565 #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb,   EXT4_FEATURE_COMPAT_DIR_INDEX) &&   (EXT4_I(dir)->i_flags & EXT4_INDEX_FL))
    566 #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
    567 #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
    568 
    569 #define DX_HASH_LEGACY 0
    570 #define DX_HASH_HALF_MD4 1
    571 #define DX_HASH_TEA 2
    572 #define DX_HASH_LEGACY_UNSIGNED 3
    573 #define DX_HASH_HALF_MD4_UNSIGNED 4
    574 #define DX_HASH_TEA_UNSIGNED 5
    575 
    576 #endif
    577 
    578