tools/brcm/hndtools-mipsel-uclibc-3.4.6/include/linux/ext3_fs.h

   1 /*
   2  *  linux/include/linux/ext3_fs.h
   3  *
   4  * Copyright (C) 1992, 1993, 1994, 1995
   5  * Remy Card (card@masi.ibp.fr)
   6  * Laboratoire MASI - Institut Blaise Pascal
   7  * Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  *  from
  10  *
  11  *  linux/include/linux/minix_fs.h
  12  *
  13  *  Copyright (C) 1991, 1992  Linus Torvalds
  14  */
  15
  16 #ifndef _LINUX_EXT3_FS_H
  17 #define _LINUX_EXT3_FS_H
  18
  19 #include <linux/types.h>
  20
  21 /*
  22  * The second extended filesystem constants/structures
  23  */
  24
  25 /*
  26  * Define EXT3FS_DEBUG to produce debug messages
  27  */
  28 #undef EXT3FS_DEBUG
  29
  30 /*
  31  * Define EXT3_PREALLOCATE to preallocate data blocks for expanding files
  32  */
  33 #undef  EXT3_PREALLOCATE /* @@@ Fix this! */
  34 #define EXT3_DEFAULT_PREALLOC_BLOCKS    8
  35
  36 /*
  37  * The second extended file system version
  38  */
  39 #define EXT3FS_DATE             "19 August 2002"
  40 #define EXT3FS_VERSION          "2.4-0.9.19"
  41
  42 /*
  43  * Debug code
  44  */
  45 #ifdef EXT3FS_DEBUG
  46 #define ext3_debug(f, a...)                                             \
  47         do {                                                            \
  48                 printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:",       \
  49                         __FILE__, __LINE__, __FUNCTION__);              \
  50                 printk (KERN_DEBUG f, ## a);                            \
  51         } while (0)
  52 #else
  53 #define ext3_debug(f, a...)     do {} while (0)
  54 #endif
  55
  56 /*
  57  * Special inodes numbers
  58  */
  59 #define EXT3_BAD_INO             1      /* Bad blocks inode */
  60 #define EXT3_ROOT_INO            2      /* Root inode */
  61 #define EXT3_ACL_IDX_INO         3      /* ACL inode */
  62 #define EXT3_ACL_DATA_INO        4      /* ACL inode */
  63 #define EXT3_BOOT_LOADER_INO     5      /* Boot loader inode */
  64 #define EXT3_UNDEL_DIR_INO       6      /* Undelete directory inode */
  65 #define EXT3_RESIZE_INO          7      /* Reserved group descriptors inode */
  66 #define EXT3_JOURNAL_INO         8      /* Journal inode */
  67
  68 /* First non-reserved inode for old ext3 filesystems */
  69 #define EXT3_GOOD_OLD_FIRST_INO 11
  70
  71 /*
  72  * The second extended file system magic number
  73  */
  74 #define EXT3_SUPER_MAGIC        0xEF53
  75
  76 /*
  77  * Maximal count of links to a file
  78  */
  79 #define EXT3_LINK_MAX           32000
  80
  81 /*
  82  * Macro-instructions used to manage several block sizes
  83  */
  84 #define EXT3_MIN_BLOCK_SIZE             1024
  85 #define EXT3_MAX_BLOCK_SIZE             4096
  86 #define EXT3_MIN_BLOCK_LOG_SIZE           10
  87 #ifdef __KERNEL__
  88 # define EXT3_BLOCK_SIZE(s)             ((s)->s_blocksize)
  89 #else
  90 # define EXT3_BLOCK_SIZE(s)             (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
  91 #endif
  92 #define EXT3_ACLE_PER_BLOCK(s)          (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_acl_entry))
  93 #define EXT3_ADDR_PER_BLOCK(s)          (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
  94 #ifdef __KERNEL__
  95 # define EXT3_BLOCK_SIZE_BITS(s)        ((s)->s_blocksize_bits)
  96 #else
  97 # define EXT3_BLOCK_SIZE_BITS(s)        ((s)->s_log_block_size + 10)
  98 #endif
  99 #ifdef __KERNEL__
 100 #define EXT3_ADDR_PER_BLOCK_BITS(s)     ((s)->u.ext3_sb.s_addr_per_block_bits)
 101 #define EXT3_INODE_SIZE(s)              ((s)->u.ext3_sb.s_inode_size)
 102 #define EXT3_FIRST_INO(s)               ((s)->u.ext3_sb.s_first_ino)
 103 #else
 104 #define EXT3_INODE_SIZE(s)      (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
 105                                  EXT3_GOOD_OLD_INODE_SIZE : \
 106                                  (s)->s_inode_size)
 107 #define EXT3_FIRST_INO(s)       (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
 108                                  EXT3_GOOD_OLD_FIRST_INO : \
 109                                  (s)->s_first_ino)
 110 #endif
 111
 112 /*
 113  * Macro-instructions used to manage fragments
 114  */
 115 #define EXT3_MIN_FRAG_SIZE              1024
 116 #define EXT3_MAX_FRAG_SIZE              4096
 117 #define EXT3_MIN_FRAG_LOG_SIZE            10
 118 #ifdef __KERNEL__
 119 # define EXT3_FRAG_SIZE(s)              ((s)->u.ext3_sb.s_frag_size)
 120 # define EXT3_FRAGS_PER_BLOCK(s)        ((s)->u.ext3_sb.s_frags_per_block)
 121 #else
 122 # define EXT3_FRAG_SIZE(s)              (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
 123 # define EXT3_FRAGS_PER_BLOCK(s)        (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
 124 #endif
 125
 126 /*
 127  * ACL structures
 128  */
 129 struct ext3_acl_header  /* Header of Access Control Lists */
 130 {
 131         __u32   aclh_size;
 132         __u32   aclh_file_count;
 133         __u32   aclh_acle_count;
 134         __u32   aclh_first_acle;
 135 };
 136
 137 struct ext3_acl_entry   /* Access Control List Entry */
 138 {
 139         __u32   acle_size;
 140         __u16   acle_perms;     /* Access permissions */
 141         __u16   acle_type;      /* Type of entry */
 142         __u16   acle_tag;       /* User or group identity */
 143         __u16   acle_pad1;
 144         __u32   acle_next;      /* Pointer on next entry for the */
 145                                         /* same inode or on next free entry */
 146 };
 147
 148 /*
 149  * Structure of a blocks group descriptor
 150  */
 151 struct ext3_group_desc
 152 {
 153         __u32   bg_block_bitmap;                /* Blocks bitmap block */
 154         __u32   bg_inode_bitmap;                /* Inodes bitmap block */
 155         __u32   bg_inode_table;         /* Inodes table block */
 156         __u16   bg_free_blocks_count;   /* Free blocks count */
 157         __u16   bg_free_inodes_count;   /* Free inodes count */
 158         __u16   bg_used_dirs_count;     /* Directories count */
 159         __u16   bg_pad;
 160         __u32   bg_reserved[3];
 161 };
 162
 163 /*
 164  * Macro-instructions used to manage group descriptors
 165  */
 166 #ifdef __KERNEL__
 167 # define EXT3_BLOCKS_PER_GROUP(s)       ((s)->u.ext3_sb.s_blocks_per_group)
 168 # define EXT3_DESC_PER_BLOCK(s)         ((s)->u.ext3_sb.s_desc_per_block)
 169 # define EXT3_INODES_PER_GROUP(s)       ((s)->u.ext3_sb.s_inodes_per_group)
 170 # define EXT3_DESC_PER_BLOCK_BITS(s)    ((s)->u.ext3_sb.s_desc_per_block_bits)
 171 #else
 172 # define EXT3_BLOCKS_PER_GROUP(s)       ((s)->s_blocks_per_group)
 173 # define EXT3_DESC_PER_BLOCK(s)         (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
 174 # define EXT3_INODES_PER_GROUP(s)       ((s)->s_inodes_per_group)
 175 #endif
 176
 177 /*
 178  * Constants relative to the data blocks
 179  */
 180 #define EXT3_NDIR_BLOCKS                12
 181 #define EXT3_IND_BLOCK                  EXT3_NDIR_BLOCKS
 182 #define EXT3_DIND_BLOCK                 (EXT3_IND_BLOCK + 1)
 183 #define EXT3_TIND_BLOCK                 (EXT3_DIND_BLOCK + 1)
 184 #define EXT3_N_BLOCKS                   (EXT3_TIND_BLOCK + 1)
 185
 186 /*
 187  * Inode flags
 188  */
 189 #define EXT3_SECRM_FL                   0x00000001 /* Secure deletion */
 190 #define EXT3_UNRM_FL                    0x00000002 /* Undelete */
 191 #define EXT3_COMPR_FL                   0x00000004 /* Compress file */
 192 #define EXT3_SYNC_FL                    0x00000008 /* Synchronous updates */
 193 #define EXT3_IMMUTABLE_FL               0x00000010 /* Immutable file */
 194 #define EXT3_APPEND_FL                  0x00000020 /* writes to file may only append */
 195 #define EXT3_NODUMP_FL                  0x00000040 /* do not dump file */
 196 #define EXT3_NOATIME_FL                 0x00000080 /* do not update atime */
 197 /* Reserved for compression usage... */
 198 #define EXT3_DIRTY_FL                   0x00000100
 199 #define EXT3_COMPRBLK_FL                0x00000200 /* One or more compressed clusters */
 200 #define EXT3_NOCOMPR_FL                 0x00000400 /* Don't compress */
 201 #define EXT3_ECOMPR_FL                  0x00000800 /* Compression error */
 202 /* End compression flags --- maybe not all used */
 203 #define EXT3_INDEX_FL                   0x00001000 /* hash-indexed directory */
 204 #define EXT3_IMAGIC_FL                  0x00002000 /* AFS directory */
 205 #define EXT3_JOURNAL_DATA_FL            0x00004000 /* file data should be journaled */
 206 #define EXT3_RESERVED_FL                0x80000000 /* reserved for ext3 lib */
 207
 208 #define EXT3_FL_USER_VISIBLE            0x00005FFF /* User visible flags */
 209 #define EXT3_FL_USER_MODIFIABLE         0x000000FF /* User modifiable flags */
 210
 211 /*
 212  * Inode dynamic state flags
 213  */
 214 #define EXT3_STATE_JDATA                0x00000001 /* journaled data exists */
 215 #define EXT3_STATE_NEW                  0x00000002 /* inode is newly created */
 216
 217 /*
 218  * ioctl commands
 219  */
 220 #define EXT3_IOC_GETFLAGS               _IOR('f', 1, long)
 221 #define EXT3_IOC_SETFLAGS               _IOW('f', 2, long)
 222 #define EXT3_IOC_GETVERSION             _IOR('f', 3, long)
 223 #define EXT3_IOC_SETVERSION             _IOW('f', 4, long)
 224 #define EXT3_IOC_GETVERSION_OLD         _IOR('v', 1, long)
 225 #define EXT3_IOC_SETVERSION_OLD         _IOW('v', 2, long)
 226 #ifdef CONFIG_JBD_DEBUG
 227 #define EXT3_IOC_WAIT_FOR_READONLY      _IOR('f', 99, long)
 228 #endif
 229
 230 /*
 231  * Structure of an inode on the disk
 232  */
 233 struct ext3_inode {
 234         __u16   i_mode;         /* File mode */
 235         __u16   i_uid;          /* Low 16 bits of Owner Uid */
 236         __u32   i_size;         /* Size in bytes */
 237         __u32   i_atime;        /* Access time */
 238         __u32   i_ctime;        /* Creation time */
 239         __u32   i_mtime;        /* Modification time */
 240         __u32   i_dtime;        /* Deletion Time */
 241         __u16   i_gid;          /* Low 16 bits of Group Id */
 242         __u16   i_links_count;  /* Links count */
 243         __u32   i_blocks;       /* Blocks count */
 244         __u32   i_flags;        /* File flags */
 245         union {
 246                 struct {
 247                         __u32  l_i_reserved1;
 248                 } linux1;
 249                 struct {
 250                         __u32  h_i_translator;
 251                 } hurd1;
 252                 struct {
 253                         __u32  m_i_reserved1;
 254                 } masix1;
 255         } osd1;                         /* OS dependent 1 */
 256         __u32   i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
 257         __u32   i_generation;   /* File version (for NFS) */
 258         __u32   i_file_acl;     /* File ACL */
 259         __u32   i_dir_acl;      /* Directory ACL */
 260         __u32   i_faddr;        /* Fragment address */
 261         union {
 262                 struct {
 263                         __u8    l_i_frag;       /* Fragment number */
 264                         __u8    l_i_fsize;      /* Fragment size */
 265                         __u16   i_pad1;
 266                         __u16   l_i_uid_high;   /* these 2 fields    */
 267                         __u16   l_i_gid_high;   /* were reserved2[0] */
 268                         __u32   l_i_reserved2;
 269                 } linux2;
 270                 struct {
 271                         __u8    h_i_frag;       /* Fragment number */
 272                         __u8    h_i_fsize;      /* Fragment size */
 273                         __u16   h_i_mode_high;
 274                         __u16   h_i_uid_high;
 275                         __u16   h_i_gid_high;
 276                         __u32   h_i_author;
 277                 } hurd2;
 278                 struct {
 279                         __u8    m_i_frag;       /* Fragment number */
 280                         __u8    m_i_fsize;      /* Fragment size */
 281                         __u16   m_pad1;
 282                         __u32   m_i_reserved2[2];
 283                 } masix2;
 284         } osd2;                         /* OS dependent 2 */
 285 };
 286
 287 #define i_size_high     i_dir_acl
 288
 289 #if defined(__KERNEL__) || defined(__linux__)
 290 #define i_reserved1     osd1.linux1.l_i_reserved1
 291 #define i_frag          osd2.linux2.l_i_frag
 292 #define i_fsize         osd2.linux2.l_i_fsize
 293 #define i_uid_low       i_uid
 294 #define i_gid_low       i_gid
 295 #define i_uid_high      osd2.linux2.l_i_uid_high
 296 #define i_gid_high      osd2.linux2.l_i_gid_high
 297 #define i_reserved2     osd2.linux2.l_i_reserved2
 298
 299 #elif defined(__GNU__)
 300
 301 #define i_translator    osd1.hurd1.h_i_translator
 302 #define i_frag          osd2.hurd2.h_i_frag;
 303 #define i_fsize         osd2.hurd2.h_i_fsize;
 304 #define i_uid_high      osd2.hurd2.h_i_uid_high
 305 #define i_gid_high      osd2.hurd2.h_i_gid_high
 306 #define i_author        osd2.hurd2.h_i_author
 307
 308 #elif defined(__masix__)
 309
 310 #define i_reserved1     osd1.masix1.m_i_reserved1
 311 #define i_frag          osd2.masix2.m_i_frag
 312 #define i_fsize         osd2.masix2.m_i_fsize
 313 #define i_reserved2     osd2.masix2.m_i_reserved2
 314
 315 #endif /* defined(__KERNEL__) || defined(__linux__) */
 316
 317 /*
 318  * File system states
 319  */
 320 #define EXT3_VALID_FS                   0x0001  /* Unmounted cleanly */
 321 #define EXT3_ERROR_FS                   0x0002  /* Errors detected */
 322 #define EXT3_ORPHAN_FS                  0x0004  /* Orphans being recovered */
 323
 324 /*
 325  * Mount flags
 326  */
 327 #define EXT3_MOUNT_CHECK                0x0001  /* Do mount-time checks */
 328 #define EXT3_MOUNT_GRPID                0x0004  /* Create files with directory's group */
 329 #define EXT3_MOUNT_DEBUG                0x0008  /* Some debugging messages */
 330 #define EXT3_MOUNT_ERRORS_CONT          0x0010  /* Continue on errors */
 331 #define EXT3_MOUNT_ERRORS_RO            0x0020  /* Remount fs ro on errors */
 332 #define EXT3_MOUNT_ERRORS_PANIC         0x0040  /* Panic on errors */
 333 #define EXT3_MOUNT_MINIX_DF             0x0080  /* Mimics the Minix statfs */
 334 #define EXT3_MOUNT_NOLOAD               0x0100  /* Don't use existing journal*/
 335 #define EXT3_MOUNT_ABORT                0x0200  /* Fatal error detected */
 336 #define EXT3_MOUNT_DATA_FLAGS           0x0C00  /* Mode for data writes: */
 337   #define EXT3_MOUNT_JOURNAL_DATA       0x0400  /* Write data to journal */
 338   #define EXT3_MOUNT_ORDERED_DATA       0x0800  /* Flush data before commit */
 339   #define EXT3_MOUNT_WRITEBACK_DATA     0x0C00  /* No data ordering */
 340 #define EXT3_MOUNT_UPDATE_JOURNAL       0x1000  /* Update the journal format */
 341 #define EXT3_MOUNT_NO_UID32             0x2000  /* Disable 32-bit UIDs */
 342
 343 /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
 344 #ifndef _LINUX_EXT2_FS_H
 345 #define clear_opt(o, opt)               o &= ~EXT3_MOUNT_##opt
 346 #define set_opt(o, opt)                 o |= EXT3_MOUNT_##opt
 347 #define test_opt(sb, opt)               ((sb)->u.ext3_sb.s_mount_opt & \
 348                                          EXT3_MOUNT_##opt)
 349 #else
 350 #define EXT2_MOUNT_NOLOAD               EXT3_MOUNT_NOLOAD
 351 #define EXT2_MOUNT_ABORT                EXT3_MOUNT_ABORT
 352 #define EXT2_MOUNT_DATA_FLAGS           EXT3_MOUNT_DATA_FLAGS
 353 #endif
 354
 355 #define ext3_set_bit                    ext2_set_bit
 356 #define ext3_clear_bit                  ext2_clear_bit
 357 #define ext3_test_bit                   ext2_test_bit
 358 #define ext3_find_first_zero_bit        ext2_find_first_zero_bit
 359 #define ext3_find_next_zero_bit         ext2_find_next_zero_bit
 360
 361 /*
 362  * Maximal mount counts between two filesystem checks
 363  */
 364 #define EXT3_DFL_MAX_MNT_COUNT          20      /* Allow 20 mounts */
 365 #define EXT3_DFL_CHECKINTERVAL          0       /* Don't use interval check */
 366
 367 /*
 368  * Behaviour when detecting errors
 369  */
 370 #define EXT3_ERRORS_CONTINUE            1       /* Continue execution */
 371 #define EXT3_ERRORS_RO                  2       /* Remount fs read-only */
 372 #define EXT3_ERRORS_PANIC               3       /* Panic */
 373 #define EXT3_ERRORS_DEFAULT             EXT3_ERRORS_CONTINUE
 374
 375 /*
 376  * Structure of the super block
 377  */
 378 struct ext3_super_block {
 379 /*00*/  __u32   s_inodes_count;         /* Inodes count */
 380         __u32   s_blocks_count;         /* Blocks count */
 381         __u32   s_r_blocks_count;       /* Reserved blocks count */
 382         __u32   s_free_blocks_count;    /* Free blocks count */
 383 /*10*/  __u32   s_free_inodes_count;    /* Free inodes count */
 384         __u32   s_first_data_block;     /* First Data Block */
 385         __u32   s_log_block_size;       /* Block size */
 386         __s32   s_log_frag_size;        /* Fragment size */
 387 /*20*/  __u32   s_blocks_per_group;     /* # Blocks per group */
 388         __u32   s_frags_per_group;      /* # Fragments per group */
 389         __u32   s_inodes_per_group;     /* # Inodes per group */
 390         __u32   s_mtime;                /* Mount time */
 391 /*30*/  __u32   s_wtime;                /* Write time */
 392         __u16   s_mnt_count;            /* Mount count */
 393         __s16   s_max_mnt_count;        /* Maximal mount count */
 394         __u16   s_magic;                /* Magic signature */
 395         __u16   s_state;                /* File system state */
 396         __u16   s_errors;               /* Behaviour when detecting errors */
 397         __u16   s_minor_rev_level;      /* minor revision level */
 398 /*40*/  __u32   s_lastcheck;            /* time of last check */
 399         __u32   s_checkinterval;        /* max. time between checks */
 400         __u32   s_creator_os;           /* OS */
 401         __u32   s_rev_level;            /* Revision level */
 402 /*50*/  __u16   s_def_resuid;           /* Default uid for reserved blocks */
 403         __u16   s_def_resgid;           /* Default gid for reserved blocks */
 404         /*
 405          * These fields are for EXT3_DYNAMIC_REV superblocks only.
 406          *
 407          * Note: the difference between the compatible feature set and
 408          * the incompatible feature set is that if there is a bit set
 409          * in the incompatible feature set that the kernel doesn't
 410          * know about, it should refuse to mount the filesystem.
 411          *
 412          * e2fsck's requirements are more strict; if it doesn't know
 413          * about a feature in either the compatible or incompatible
 414          * feature set, it must abort and not try to meddle with
 415          * things it doesn't understand...
 416          */
 417         __u32   s_first_ino;            /* First non-reserved inode */
 418         __u16   s_inode_size;           /* size of inode structure */
 419         __u16   s_block_group_nr;       /* block group # of this superblock */
 420         __u32   s_feature_compat;       /* compatible feature set */
 421 /*60*/  __u32   s_feature_incompat;     /* incompatible feature set */
 422         __u32   s_feature_ro_compat;    /* readonly-compatible feature set */
 423 /*68*/  __u8    s_uuid[16];             /* 128-bit uuid for volume */
 424 /*78*/  char    s_volume_name[16];      /* volume name */
 425 /*88*/  char    s_last_mounted[64];     /* directory where last mounted */
 426 /*C8*/  __u32   s_algorithm_usage_bitmap; /* For compression */
 427         /*
 428          * Performance hints.  Directory preallocation should only
 429          * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
 430          */
 431         __u8    s_prealloc_blocks;      /* Nr of blocks to try to preallocate*/
 432         __u8    s_prealloc_dir_blocks;  /* Nr to preallocate for dirs */
 433         __u16   s_padding1;
 434         /*
 435          * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
 436          */
 437 /*D0*/  __u8    s_journal_uuid[16];     /* uuid of journal superblock */
 438 /*E0*/  __u32   s_journal_inum;         /* inode number of journal file */
 439         __u32   s_journal_dev;          /* device number of journal file */
 440         __u32   s_last_orphan;          /* start of list of inodes to delete */
 441         __u32   s_hash_seed[4];         /* HTREE hash seed */
 442         __u8    s_def_hash_version;     /* Default hash version to use */
 443         __u8    s_reserved_char_pad;
 444         __u16   s_reserved_word_pad;
 445         __u32   s_default_mount_opts;
 446         __u32   s_first_meta_bg;        /* First metablock block group */
 447         __u32   s_reserved[190];        /* Padding to the end of the block */
 448 };
 449
 450 #ifdef __KERNEL__
 451 #define EXT3_SB(sb)     (&((sb)->u.ext3_sb))
 452 #define EXT3_I(inode)   (&((inode)->u.ext3_i))
 453 #else
 454 /* Assume that user mode programs are passing in an ext3fs superblock, not
 455  * a kernel struct super_block.  This will allow us to call the feature-test
 456  * macros from user land. */
 457 #define EXT3_SB(sb)     (sb)
 458 #endif
 459
 460 #define NEXT_ORPHAN(inode) (inode)->u.ext3_i.i_dtime
 461
 462 /*
 463  * Codes for operating systems
 464  */
 465 #define EXT3_OS_LINUX           0
 466 #define EXT3_OS_HURD            1
 467 #define EXT3_OS_MASIX           2
 468 #define EXT3_OS_FREEBSD         3
 469 #define EXT3_OS_LITES           4
 470
 471 /*
 472  * Revision levels
 473  */
 474 #define EXT3_GOOD_OLD_REV       0       /* The good old (original) format */
 475 #define EXT3_DYNAMIC_REV        1       /* V2 format w/ dynamic inode sizes */
 476
 477 #define EXT3_CURRENT_REV        EXT3_GOOD_OLD_REV
 478 #define EXT3_MAX_SUPP_REV       EXT3_DYNAMIC_REV
 479
 480 #define EXT3_GOOD_OLD_INODE_SIZE 128
 481
 482 /*
 483  * Feature set definitions
 484  */
 485
 486 #define EXT3_HAS_COMPAT_FEATURE(sb,mask)                        \
 487         ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
 488 #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask)                     \
 489         ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
 490 #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask)                      \
 491         ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
 492 #define EXT3_SET_COMPAT_FEATURE(sb,mask)                        \
 493         EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
 494 #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask)                     \
 495         EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
 496 #define EXT3_SET_INCOMPAT_FEATURE(sb,mask)                      \
 497         EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
 498 #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask)                      \
 499         EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
 500 #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask)                   \
 501         EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
 502 #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask)                    \
 503         EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
 504
 505 #define EXT3_FEATURE_COMPAT_DIR_PREALLOC        0x0001
 506 #define EXT3_FEATURE_COMPAT_IMAGIC_INODES       0x0002
 507 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL         0x0004
 508 #define EXT3_FEATURE_COMPAT_EXT_ATTR            0x0008
 509 #define EXT3_FEATURE_COMPAT_RESIZE_INODE        0x0010
 510 #define EXT3_FEATURE_COMPAT_DIR_INDEX           0x0020
 511
 512 #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER     0x0001
 513 #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE       0x0002
 514 #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR        0x0004
 515
 516 #define EXT3_FEATURE_INCOMPAT_COMPRESSION       0x0001
 517 #define EXT3_FEATURE_INCOMPAT_FILETYPE          0x0002
 518 #define EXT3_FEATURE_INCOMPAT_RECOVER           0x0004 /* Needs recovery */
 519 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV       0x0008 /* Journal device */
 520 #define EXT3_FEATURE_INCOMPAT_META_BG           0x0010
 521
 522 #define EXT3_FEATURE_COMPAT_SUPP        0
 523 #define EXT3_FEATURE_INCOMPAT_SUPP      (EXT3_FEATURE_INCOMPAT_FILETYPE| \
 524                                          EXT3_FEATURE_INCOMPAT_RECOVER| \
 525                                          EXT3_FEATURE_INCOMPAT_META_BG)
 526 #define EXT3_FEATURE_RO_COMPAT_SUPP     (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
 527                                          EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
 528                                          EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
 529
 530 /*
 531  * Default mount options
 532  */
 533 #define EXT3_DEFM_DEBUG         0x0001
 534 #define EXT3_DEFM_BSDGROUPS     0x0002
 535 #define EXT3_DEFM_XATTR_USER    0x0004
 536 #define EXT3_DEFM_ACL           0x0008
 537 #define EXT3_DEFM_UID16         0x0010
 538 #define EXT3_DEFM_JMODE         0x0060
 539 #define EXT3_DEFM_JMODE_DATA    0x0020
 540 #define EXT3_DEFM_JMODE_ORDERED 0x0040
 541 #define EXT3_DEFM_JMODE_WBACK   0x0060
 542
 543 #define        EXT3_DEF_RESUID         0
 544 #define        EXT3_DEF_RESGID         0
 545
 546 /*
 547  * Structure of a directory entry
 548  */
 549 #define EXT3_NAME_LEN 255
 550
 551 struct ext3_dir_entry {
 552         __u32   inode;                  /* Inode number */
 553         __u16   rec_len;                /* Directory entry length */
 554         __u16   name_len;               /* Name length */
 555         char    name[EXT3_NAME_LEN];    /* File name */
 556 };
 557
 558 /*
 559  * The new version of the directory entry.  Since EXT3 structures are
 560  * stored in intel byte order, and the name_len field could never be
 561  * bigger than 255 chars, it's safe to reclaim the extra byte for the
 562  * file_type field.
 563  */
 564 struct ext3_dir_entry_2 {
 565         __u32   inode;                  /* Inode number */
 566         __u16   rec_len;                /* Directory entry length */
 567         __u8    name_len;               /* Name length */
 568         __u8    file_type;
 569         char    name[EXT3_NAME_LEN];    /* File name */
 570 };
 571
 572 /*
 573  * Ext3 directory file types.  Only the low 3 bits are used.  The
 574  * other bits are reserved for now.
 575  */
 576 #define EXT3_FT_UNKNOWN         0
 577 #define EXT3_FT_REG_FILE        1
 578 #define EXT3_FT_DIR             2
 579 #define EXT3_FT_CHRDEV          3
 580 #define EXT3_FT_BLKDEV          4
 581 #define EXT3_FT_FIFO            5
 582 #define EXT3_FT_SOCK            6
 583 #define EXT3_FT_SYMLINK         7
 584
 585 #define EXT3_FT_MAX             8
 586
 587 /*
 588  * EXT3_DIR_PAD defines the directory entries boundaries
 589  *
 590  * NOTE: It must be a multiple of 4
 591  */
 592 #define EXT3_DIR_PAD                    4
 593 #define EXT3_DIR_ROUND                  (EXT3_DIR_PAD - 1)
 594 #define EXT3_DIR_REC_LEN(name_len)      (((name_len) + 8 + EXT3_DIR_ROUND) & \
 595                                          ~EXT3_DIR_ROUND)
 596
 597 #ifdef __KERNEL__
 598 /*
 599  * Describe an inode's exact location on disk and in memory
 600  */
 601 struct ext3_iloc
 602 {
 603         struct buffer_head *bh;
 604         struct ext3_inode *raw_inode;
 605         unsigned long block_group;
 606 };
 607
 608 /*
 609  * Function prototypes
 610  */
 611
 612 /*
 613  * Ok, these declarations are also in <linux/kernel.h> but none of the
 614  * ext3 source programs needs to include it so they are duplicated here.
 615  */
 616 # define NORET_TYPE    /**/
 617 # define ATTRIB_NORET  __attribute__((noreturn))
 618 # define NORET_AND     noreturn,
 619
 620 /* balloc.c */
 621 extern int ext3_bg_has_super(struct super_block *sb, int group);
 622 extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group);
 623 extern int ext3_new_block (handle_t *, struct inode *, unsigned long,
 624                                             __u32 *, __u32 *, int *);
 625 extern void ext3_free_blocks (handle_t *, struct inode *, unsigned long,
 626                               unsigned long);
 627 extern unsigned long ext3_count_free_blocks (struct super_block *);
 628 extern void ext3_check_blocks_bitmap (struct super_block *);
 629 extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb,
 630                                                     unsigned int block_group,
 631                                                     struct buffer_head ** bh);
 632
 633 /* dir.c */
 634 extern int ext3_check_dir_entry(const char *, struct inode *,
 635                                 struct ext3_dir_entry_2 *, struct buffer_head *,
 636                                 unsigned long);
 637 /* fsync.c */
 638 extern int ext3_sync_file (struct file *, struct dentry *, int);
 639
 640 /* ialloc.c */
 641 extern struct inode * ext3_new_inode (handle_t *, const struct inode *, int);
 642 extern void ext3_free_inode (handle_t *, struct inode *);
 643 extern struct inode * ext3_orphan_get (struct super_block *, unsigned long);
 644 extern unsigned long ext3_count_free_inodes (struct super_block *);
 645 extern void ext3_check_inodes_bitmap (struct super_block *);
 646 extern unsigned long ext3_count_free (struct buffer_head *, unsigned);
 647
 648 /* inode.c */
 649 extern struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *);
 650 extern struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *);
 651
 652 extern int  ext3_get_inode_loc (struct inode *, struct ext3_iloc *);
 653 extern void ext3_read_inode (struct inode *);
 654 extern void ext3_write_inode (struct inode *, int);
 655 extern int  ext3_setattr (struct dentry *, struct iattr *);
 656 extern void ext3_put_inode (struct inode *);
 657 extern void ext3_delete_inode (struct inode *);
 658 extern int  ext3_sync_inode (handle_t *, struct inode *);
 659 extern void ext3_discard_prealloc (struct inode *);
 660 extern void ext3_dirty_inode(struct inode *);
 661 extern int ext3_change_inode_journal_flag(struct inode *, int);
 662 extern void ext3_truncate (struct inode *);
 663 extern void ext3_set_inode_flags(struct inode *);
 664
 665 /* ioctl.c */
 666 extern int ext3_ioctl (struct inode *, struct file *, unsigned int,
 667                        unsigned long);
 668
 669 /* namei.c */
 670 extern int ext3_orphan_add(handle_t *, struct inode *);
 671 extern int ext3_orphan_del(handle_t *, struct inode *);
 672
 673 /* super.c */
 674 extern void ext3_error (struct super_block *, const char *, const char *, ...)
 675         __attribute__ ((format (printf, 3, 4)));
 676 extern void __ext3_std_error (struct super_block *, const char *, int);
 677 extern void ext3_abort (struct super_block *, const char *, const char *, ...)
 678         __attribute__ ((format (printf, 3, 4)));
 679 extern NORET_TYPE void ext3_panic (struct super_block *, const char *,
 680                                    const char *, ...)
 681         __attribute__ ((NORET_AND format (printf, 3, 4)));
 682 extern void ext3_warning (struct super_block *, const char *, const char *, ...)
 683         __attribute__ ((format (printf, 3, 4)));
 684 extern void ext3_update_dynamic_rev (struct super_block *sb);
 685 extern void ext3_put_super (struct super_block *);
 686 extern void ext3_write_super (struct super_block *);
 687 extern void ext3_write_super_lockfs (struct super_block *);
 688 extern void ext3_unlockfs (struct super_block *);
 689 extern int ext3_remount (struct super_block *, int *, char *);
 690 extern struct super_block * ext3_read_super (struct super_block *,void *,int);
 691 extern int ext3_statfs (struct super_block *, struct statfs *);
 692
 693 #define ext3_std_error(sb, errno)                               \
 694 do {                                                            \
 695         if ((errno))                                            \
 696                 __ext3_std_error((sb), __FUNCTION__, (errno));  \
 697 } while (0)
 698 extern const char *ext3_decode_error(struct super_block *sb, int errno, char nbuf[16]);
 699
 700 /*
 701  * Inodes and files operations
 702  */
 703
 704 /* dir.c */
 705 extern struct file_operations ext3_dir_operations;
 706
 707 /* file.c */
 708 extern struct inode_operations ext3_file_inode_operations;
 709 extern struct file_operations ext3_file_operations;
 710
 711 /* inode.c */
 712 extern struct address_space_operations ext3_aops;
 713
 714 /* namei.c */
 715 extern struct inode_operations ext3_dir_inode_operations;
 716
 717 /* symlink.c */
 718 extern struct inode_operations ext3_fast_symlink_inode_operations;
 719
 720
 721 #endif  /* __KERNEL__ */
 722
 723 #endif  /* _LINUX_EXT3_FS_H */