fs/xfs/xfs_types.h

   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  */
  26 typedef signed char             __int8_t;
  27 typedef unsigned char           __uint8_t;
  28 typedef signed short int        __int16_t;
  29 typedef unsigned short int      __uint16_t;
  30 typedef signed int              __int32_t;
  31 typedef unsigned int            __uint32_t;
  32 typedef signed long long int    __int64_t;
  33 typedef unsigned long long int  __uint64_t;
  34
  35 typedef __uint32_t              prid_t;         /* project ID */
  36 typedef __uint32_t              inst_t;         /* an instruction */
  37
  38 typedef __s64                   xfs_off_t;      /* <file offset> type */
  39 typedef unsigned long long      xfs_ino_t;      /* <inode> type */
  40 typedef __s64                   xfs_daddr_t;    /* <disk address> type */
  41 typedef char *                  xfs_caddr_t;    /* <core address> type */
  42 typedef __u32                   xfs_dev_t;
  43 typedef __u32                   xfs_nlink_t;
  44
  45 /* __psint_t is the same size as a pointer */
  46 #if (BITS_PER_LONG == 32)
  47 typedef __int32_t __psint_t;
  48 typedef __uint32_t __psunsigned_t;
  49 #elif (BITS_PER_LONG == 64)
  50 typedef __int64_t __psint_t;
  51 typedef __uint64_t __psunsigned_t;
  52 #else
  53 #error BITS_PER_LONG must be 32 or 64
  54 #endif
  55
  56 #endif  /* __KERNEL__ */
  57
  58 typedef __uint32_t      xfs_agblock_t;  /* blockno in alloc. group */
  59 typedef __uint32_t      xfs_agino_t;    /* inode # within allocation grp */
  60 typedef __uint32_t      xfs_extlen_t;   /* extent length in blocks */
  61 typedef __uint32_t      xfs_agnumber_t; /* allocation group number */
  62 typedef __int32_t       xfs_extnum_t;   /* # of extents in a file */
  63 typedef __int16_t       xfs_aextnum_t;  /* # extents in an attribute fork */
  64 typedef __int64_t       xfs_fsize_t;    /* bytes in a file */
  65 typedef __uint64_t      xfs_ufsize_t;   /* unsigned bytes in a file */
  66
  67 typedef __int32_t       xfs_suminfo_t;  /* type of bitmap summary info */
  68 typedef __int32_t       xfs_rtword_t;   /* word type for bitmap manipulations */
  69
  70 typedef __int64_t       xfs_lsn_t;      /* log sequence number */
  71 typedef __int32_t       xfs_tid_t;      /* transaction identifier */
  72
  73 typedef __uint32_t      xfs_dablk_t;    /* dir/attr block number (in file) */
  74 typedef __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  */
  80 typedef __uint64_t      xfs_dfsbno_t;   /* blockno in filesystem (agno|agbno) */
  81 typedef __uint64_t      xfs_drfsbno_t;  /* blockno in filesystem (raw) */
  82 typedef __uint64_t      xfs_drtbno_t;   /* extent (block) in realtime area */
  83 typedef __uint64_t      xfs_dfiloff_t;  /* block number in a file */
  84 typedef __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
  90 typedef __uint64_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  91 typedef __uint64_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
  92 typedef __uint64_t      xfs_rtblock_t;  /* extent (block) in realtime area */
  93 typedef __int64_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
  94 #else
  95 typedef __uint32_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  96 typedef __uint32_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
  97 typedef __uint32_t      xfs_rtblock_t;  /* extent (block) in realtime area */
  98 typedef __int32_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
  99 #endif
 100 typedef __uint64_t      xfs_fileoff_t;  /* block number in a file */
 101 typedef __int64_t       xfs_sfiloff_t;  /* signed block number in a file */
 102 typedef __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
 160 typedef enum {
 161         XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 162 } xfs_lookup_t;
 163
 164 typedef enum {
 165         XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
 166         XFS_BTNUM_MAX
 167 } xfs_btnum_t;
 168
 169 struct xfs_name {
 170         const unsigned char     *name;
 171         int                     len;
 172 };
 173
 174 #endif  /* __XFS_TYPES_H__ */