linux/fs/xfs/xfs_types.h
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   1/*
   2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it would be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write the Free Software Foundation,
  16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18#ifndef __XFS_TYPES_H__
  19#define __XFS_TYPES_H__
  20
  21#ifdef __KERNEL__
  22
  23/*
  24 * Additional type declarations for XFS
  25 */
  26typedef signed char             __int8_t;
  27typedef unsigned char           __uint8_t;
  28typedef signed short int        __int16_t;
  29typedef unsigned short int      __uint16_t;
  30typedef signed int              __int32_t;
  31typedef unsigned int            __uint32_t;
  32typedef signed long long int    __int64_t;
  33typedef unsigned long long int  __uint64_t;
  34
  35typedef __uint32_t              prid_t;         /* project ID */
  36typedef __uint32_t              inst_t;         /* an instruction */
  37
  38typedef __s64                   xfs_off_t;      /* <file offset> type */
  39typedef unsigned long long      xfs_ino_t;      /* <inode> type */
  40typedef __s64                   xfs_daddr_t;    /* <disk address> type */
  41typedef char *                  xfs_caddr_t;    /* <core address> type */
  42typedef __u32                   xfs_dev_t;
  43typedef __u32                   xfs_nlink_t;
  44
  45/* __psint_t is the same size as a pointer */
  46#if (BITS_PER_LONG == 32)
  47typedef __int32_t __psint_t;
  48typedef __uint32_t __psunsigned_t;
  49#elif (BITS_PER_LONG == 64)
  50typedef __int64_t __psint_t;
  51typedef __uint64_t __psunsigned_t;
  52#else
  53#error BITS_PER_LONG must be 32 or 64
  54#endif
  55
  56#endif  /* __KERNEL__ */
  57
  58typedef __uint32_t      xfs_agblock_t;  /* blockno in alloc. group */
  59typedef __uint32_t      xfs_agino_t;    /* inode # within allocation grp */
  60typedef __uint32_t      xfs_extlen_t;   /* extent length in blocks */
  61typedef __uint32_t      xfs_agnumber_t; /* allocation group number */
  62typedef __int32_t       xfs_extnum_t;   /* # of extents in a file */
  63typedef __int16_t       xfs_aextnum_t;  /* # extents in an attribute fork */
  64typedef __int64_t       xfs_fsize_t;    /* bytes in a file */
  65typedef __uint64_t      xfs_ufsize_t;   /* unsigned bytes in a file */
  66
  67typedef __int32_t       xfs_suminfo_t;  /* type of bitmap summary info */
  68typedef __int32_t       xfs_rtword_t;   /* word type for bitmap manipulations */
  69
  70typedef __int64_t       xfs_lsn_t;      /* log sequence number */
  71typedef __int32_t       xfs_tid_t;      /* transaction identifier */
  72
  73typedef __uint32_t      xfs_dablk_t;    /* dir/attr block number (in file) */
  74typedef __uint32_t      xfs_dahash_t;   /* dir/attr hash value */
  75
  76/*
  77 * These types are 64 bits on disk but are either 32 or 64 bits in memory.
  78 * Disk based types:
  79 */
  80typedef __uint64_t      xfs_dfsbno_t;   /* blockno in filesystem (agno|agbno) */
  81typedef __uint64_t      xfs_drfsbno_t;  /* blockno in filesystem (raw) */
  82typedef __uint64_t      xfs_drtbno_t;   /* extent (block) in realtime area */
  83typedef __uint64_t      xfs_dfiloff_t;  /* block number in a file */
  84typedef __uint64_t      xfs_dfilblks_t; /* number of blocks in a file */
  85
  86/*
  87 * Memory based types are conditional.
  88 */
  89#if XFS_BIG_BLKNOS
  90typedef __uint64_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  91typedef __uint64_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
  92typedef __uint64_t      xfs_rtblock_t;  /* extent (block) in realtime area */
  93typedef __int64_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
  94#else
  95typedef __uint32_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  96typedef __uint32_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
  97typedef __uint32_t      xfs_rtblock_t;  /* extent (block) in realtime area */
  98typedef __int32_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
  99#endif
 100typedef __uint64_t      xfs_fileoff_t;  /* block number in a file */
 101typedef __int64_t       xfs_sfiloff_t;  /* signed block number in a file */
 102typedef __uint64_t      xfs_filblks_t;  /* number of blocks in a file */
 103
 104
 105/*
 106 * Null values for the types.
 107 */
 108#define NULLDFSBNO      ((xfs_dfsbno_t)-1)
 109#define NULLDRFSBNO     ((xfs_drfsbno_t)-1)
 110#define NULLDRTBNO      ((xfs_drtbno_t)-1)
 111#define NULLDFILOFF     ((xfs_dfiloff_t)-1)
 112
 113#define NULLFSBLOCK     ((xfs_fsblock_t)-1)
 114#define NULLRFSBLOCK    ((xfs_rfsblock_t)-1)
 115#define NULLRTBLOCK     ((xfs_rtblock_t)-1)
 116#define NULLFILEOFF     ((xfs_fileoff_t)-1)
 117
 118#define NULLAGBLOCK     ((xfs_agblock_t)-1)
 119#define NULLAGNUMBER    ((xfs_agnumber_t)-1)
 120#define NULLEXTNUM      ((xfs_extnum_t)-1)
 121
 122#define NULLCOMMITLSN   ((xfs_lsn_t)-1)
 123
 124#define NULLFSINO       ((xfs_ino_t)-1)
 125#define NULLAGINO       ((xfs_agino_t)-1)
 126
 127/*
 128 * Max values for extlen, extnum, aextnum.
 129 */
 130#define MAXEXTLEN       ((xfs_extlen_t)0x001fffff)      /* 21 bits */
 131#define MAXEXTNUM       ((xfs_extnum_t)0x7fffffff)      /* signed int */
 132#define MAXAEXTNUM      ((xfs_aextnum_t)0x7fff)         /* signed short */
 133
 134/*
 135 * Minimum and maximum blocksize and sectorsize.
 136 * The blocksize upper limit is pretty much arbitrary.
 137 * The sectorsize upper limit is due to sizeof(sb_sectsize).
 138 */
 139#define XFS_MIN_BLOCKSIZE_LOG   9       /* i.e. 512 bytes */
 140#define XFS_MAX_BLOCKSIZE_LOG   16      /* i.e. 65536 bytes */
 141#define XFS_MIN_BLOCKSIZE       (1 << XFS_MIN_BLOCKSIZE_LOG)
 142#define XFS_MAX_BLOCKSIZE       (1 << XFS_MAX_BLOCKSIZE_LOG)
 143#define XFS_MIN_SECTORSIZE_LOG  9       /* i.e. 512 bytes */
 144#define XFS_MAX_SECTORSIZE_LOG  15      /* i.e. 32768 bytes */
 145#define XFS_MIN_SECTORSIZE      (1 << XFS_MIN_SECTORSIZE_LOG)
 146#define XFS_MAX_SECTORSIZE      (1 << XFS_MAX_SECTORSIZE_LOG)
 147
 148/*
 149 * Min numbers of data/attr fork btree root pointers.
 150 */
 151#define MINDBTPTRS      3
 152#define MINABTPTRS      2
 153
 154/*
 155 * MAXNAMELEN is the length (including the terminating null) of
 156 * the longest permissible file (component) name.
 157 */
 158#define MAXNAMELEN      256
 159
 160typedef enum {
 161        XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 162} xfs_lookup_t;
 163
 164typedef enum {
 165        XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
 166        XFS_BTNUM_MAX
 167} xfs_btnum_t;
 168
 169struct xfs_name {
 170        const unsigned char     *name;
 171        int                     len;
 172};
 173
 174#endif  /* __XFS_TYPES_H__ */
 175
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