libxfs/xfs_types.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #ifndef __XFS_TYPES_H__
   7 #define __XFS_TYPES_H__
   8
   9 typedef uint32_t        prid_t;         /* project ID */
  10
  11 typedef uint32_t        xfs_agblock_t;  /* blockno in alloc. group */
  12 typedef uint32_t        xfs_agino_t;    /* inode # within allocation grp */
  13 typedef uint32_t        xfs_extlen_t;   /* extent length in blocks */
  14 typedef uint32_t        xfs_agnumber_t; /* allocation group number */
  15 typedef int32_t         xfs_extnum_t;   /* # of extents in a file */
  16 typedef int16_t         xfs_aextnum_t;  /* # extents in an attribute fork */
  17 typedef int64_t         xfs_fsize_t;    /* bytes in a file */
  18 typedef uint64_t        xfs_ufsize_t;   /* unsigned bytes in a file */
  19
  20 typedef int32_t         xfs_suminfo_t;  /* type of bitmap summary info */
  21 typedef uint32_t        xfs_rtword_t;   /* word type for bitmap manipulations */
  22
  23 typedef int64_t         xfs_lsn_t;      /* log sequence number */
  24 typedef int32_t         xfs_tid_t;      /* transaction identifier */
  25
  26 typedef uint32_t        xfs_dablk_t;    /* dir/attr block number (in file) */
  27 typedef uint32_t        xfs_dahash_t;   /* dir/attr hash value */
  28
  29 typedef uint64_t        xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  30 typedef uint64_t        xfs_rfsblock_t; /* blockno in filesystem (raw) */
  31 typedef uint64_t        xfs_rtblock_t;  /* extent (block) in realtime area */
  32 typedef uint64_t        xfs_fileoff_t;  /* block number in a file */
  33 typedef uint64_t        xfs_filblks_t;  /* number of blocks in a file */
  34
  35 typedef int64_t         xfs_srtblock_t; /* signed version of xfs_rtblock_t */
  36 typedef int64_t         xfs_sfiloff_t;  /* signed block number in a file */
  37
  38 /*
  39  * New verifiers will return the instruction address of the failing check.
  40  * NULL means everything is ok.
  41  */
  42 typedef void *          xfs_failaddr_t;
  43
  44 /*
  45  * Null values for the types.
  46  */
  47 #define NULLFSBLOCK     ((xfs_fsblock_t)-1)
  48 #define NULLRFSBLOCK    ((xfs_rfsblock_t)-1)
  49 #define NULLRTBLOCK     ((xfs_rtblock_t)-1)
  50 #define NULLFILEOFF     ((xfs_fileoff_t)-1)
  51
  52 #define NULLAGBLOCK     ((xfs_agblock_t)-1)
  53 #define NULLAGNUMBER    ((xfs_agnumber_t)-1)
  54
  55 #define NULLCOMMITLSN   ((xfs_lsn_t)-1)
  56
  57 #define NULLFSINO       ((xfs_ino_t)-1)
  58 #define NULLAGINO       ((xfs_agino_t)-1)
  59
  60 /*
  61  * Max values for extlen, extnum, aextnum.
  62  */
  63 #define MAXEXTLEN       ((xfs_extlen_t)0x001fffff)      /* 21 bits */
  64 #define MAXEXTNUM       ((xfs_extnum_t)0x7fffffff)      /* signed int */
  65 #define MAXAEXTNUM      ((xfs_aextnum_t)0x7fff)         /* signed short */
  66
  67 /*
  68  * Minimum and maximum blocksize and sectorsize.
  69  * The blocksize upper limit is pretty much arbitrary.
  70  * The sectorsize upper limit is due to sizeof(sb_sectsize).
  71  * CRC enable filesystems use 512 byte inodes, meaning 512 byte block sizes
  72  * cannot be used.
  73  */
  74 #define XFS_MIN_BLOCKSIZE_LOG   9       /* i.e. 512 bytes */
  75 #define XFS_MAX_BLOCKSIZE_LOG   16      /* i.e. 65536 bytes */
  76 #define XFS_MIN_BLOCKSIZE       (1 << XFS_MIN_BLOCKSIZE_LOG)
  77 #define XFS_MAX_BLOCKSIZE       (1 << XFS_MAX_BLOCKSIZE_LOG)
  78 #define XFS_MIN_CRC_BLOCKSIZE   (1 << (XFS_MIN_BLOCKSIZE_LOG + 1))
  79 #define XFS_MIN_SECTORSIZE_LOG  9       /* i.e. 512 bytes */
  80 #define XFS_MAX_SECTORSIZE_LOG  15      /* i.e. 32768 bytes */
  81 #define XFS_MIN_SECTORSIZE      (1 << XFS_MIN_SECTORSIZE_LOG)
  82 #define XFS_MAX_SECTORSIZE      (1 << XFS_MAX_SECTORSIZE_LOG)
  83
  84 /*
  85  * Inode fork identifiers.
  86  */
  87 #define XFS_DATA_FORK   0
  88 #define XFS_ATTR_FORK   1
  89 #define XFS_COW_FORK    2
  90
  91 /*
  92  * Min numbers of data/attr fork btree root pointers.
  93  */
  94 #define MINDBTPTRS      3
  95 #define MINABTPTRS      2
  96
  97 /*
  98  * MAXNAMELEN is the length (including the terminating null) of
  99  * the longest permissible file (component) name.
 100  */
 101 #define MAXNAMELEN      256
 102
 103 typedef enum {
 104         XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 105 } xfs_lookup_t;
 106
 107 typedef enum {
 108         XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_RMAPi, XFS_BTNUM_BMAPi,
 109         XFS_BTNUM_INOi, XFS_BTNUM_FINOi, XFS_BTNUM_REFCi, XFS_BTNUM_MAX
 110 } xfs_btnum_t;
 111
 112 struct xfs_name {
 113         const unsigned char     *name;
 114         int                     len;
 115         int                     type;
 116 };
 117
 118 /*
 119  * uid_t and gid_t are hard-coded to 32 bits in the inode.
 120  * Hence, an 'id' in a dquot is 32 bits..
 121  */
 122 typedef uint32_t        xfs_dqid_t;
 123
 124 /*
 125  * Constants for bit manipulations.
 126  */
 127 #define XFS_NBBYLOG     3               /* log2(NBBY) */
 128 #define XFS_WORDLOG     2               /* log2(sizeof(xfs_rtword_t)) */
 129 #define XFS_NBWORDLOG   (XFS_NBBYLOG + XFS_WORDLOG)
 130 #define XFS_NBWORD      (1 << XFS_NBWORDLOG)
 131 #define XFS_WORDMASK    ((1 << XFS_WORDLOG) - 1)
 132
 133 struct xfs_iext_cursor {
 134         struct xfs_iext_leaf    *leaf;
 135         int                     pos;
 136 };
 137
 138 typedef enum {
 139         XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
 140 } xfs_exntst_t;
 141
 142 typedef struct xfs_bmbt_irec
 143 {
 144         xfs_fileoff_t   br_startoff;    /* starting file offset */
 145         xfs_fsblock_t   br_startblock;  /* starting block number */
 146         xfs_filblks_t   br_blockcount;  /* number of blocks */
 147         xfs_exntst_t    br_state;       /* extent state */
 148 } xfs_bmbt_irec_t;
 149
 150 #endif  /* __XFS_TYPES_H__ */