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 enum { B_FALSE,B_TRUE } boolean_t;
  36 typedef __uint32_t              prid_t;         /* project ID */
  37 typedef __uint32_t              inst_t;         /* an instruction */
  38
  39 typedef __s64                   xfs_off_t;      /* <file offset> type */
  40 typedef unsigned long long      xfs_ino_t;      /* <inode> type */
  41 typedef __s64                   xfs_daddr_t;    /* <disk address> type */
  42 typedef char *                  xfs_caddr_t;    /* <core address> type */
  43 typedef __u32                   xfs_dev_t;
  44 typedef __u32                   xfs_nlink_t;
  45
  46 /* __psint_t is the same size as a pointer */
  47 #if (BITS_PER_LONG == 32)
  48 typedef __int32_t __psint_t;
  49 typedef __uint32_t __psunsigned_t;
  50 #elif (BITS_PER_LONG == 64)
  51 typedef __int64_t __psint_t;
  52 typedef __uint64_t __psunsigned_t;
  53 #else
  54 #error BITS_PER_LONG must be 32 or 64
  55 #endif
  56
  57 #endif  /* __KERNEL__ */
  58
  59 typedef __uint32_t      xfs_agblock_t;  /* blockno in alloc. group */
  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 typedef __uint32_t      xlog_tid_t;     /* transaction ID type */
  77
  78 /*
  79  * These types are 64 bits on disk but are either 32 or 64 bits in memory.
  80  * Disk based types:
  81  */
  82 typedef __uint64_t      xfs_dfsbno_t;   /* blockno in filesystem (agno|agbno) */
  83 typedef __uint64_t      xfs_drfsbno_t;  /* blockno in filesystem (raw) */
  84 typedef __uint64_t      xfs_drtbno_t;   /* extent (block) in realtime area */
  85 typedef __uint64_t      xfs_dfiloff_t;  /* block number in a file */
  86 typedef __uint64_t      xfs_dfilblks_t; /* number of blocks in a file */
  87
  88 /*
  89  * Memory based types are conditional.
  90  */
  91 #if XFS_BIG_BLKNOS
  92 typedef __uint64_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  93 typedef __uint64_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
  94 typedef __uint64_t      xfs_rtblock_t;  /* extent (block) in realtime area */
  95 typedef __int64_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
  96 #else
  97 typedef __uint32_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  98 typedef __uint32_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
  99 typedef __uint32_t      xfs_rtblock_t;  /* extent (block) in realtime area */
 100 typedef __int32_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
 101 #endif
 102 typedef __uint64_t      xfs_fileoff_t;  /* block number in a file */
 103 typedef __int64_t       xfs_sfiloff_t;  /* signed block number in a file */
 104 typedef __uint64_t      xfs_filblks_t;  /* number of blocks in a file */
 105
 106 /*
 107  * Null values for the types.
 108  */
 109 #define NULLDFSBNO      ((xfs_dfsbno_t)-1)
 110 #define NULLDRFSBNO     ((xfs_drfsbno_t)-1)
 111 #define NULLDRTBNO      ((xfs_drtbno_t)-1)
 112 #define NULLDFILOFF     ((xfs_dfiloff_t)-1)
 113
 114 #define NULLFSBLOCK     ((xfs_fsblock_t)-1)
 115 #define NULLRFSBLOCK    ((xfs_rfsblock_t)-1)
 116 #define NULLRTBLOCK     ((xfs_rtblock_t)-1)
 117 #define NULLFILEOFF     ((xfs_fileoff_t)-1)
 118
 119 #define NULLAGBLOCK     ((xfs_agblock_t)-1)
 120 #define NULLAGNUMBER    ((xfs_agnumber_t)-1)
 121 #define NULLEXTNUM      ((xfs_extnum_t)-1)
 122
 123 #define NULLCOMMITLSN   ((xfs_lsn_t)-1)
 124
 125 /*
 126  * Max values for extlen, extnum, aextnum.
 127  */
 128 #define MAXEXTLEN       ((xfs_extlen_t)0x001fffff)      /* 21 bits */
 129 #define MAXEXTNUM       ((xfs_extnum_t)0x7fffffff)      /* signed int */
 130 #define MAXAEXTNUM      ((xfs_aextnum_t)0x7fff)         /* signed short */
 131
 132 /*
 133  * Min numbers of data/attr fork btree root pointers.
 134  */
 135 #define MINDBTPTRS      3
 136 #define MINABTPTRS      2
 137
 138 /*
 139  * MAXNAMELEN is the length (including the terminating null) of
 140  * the longest permissible file (component) name.
 141  */
 142 #define MAXNAMELEN      256
 143
 144 typedef enum {
 145         XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 146 } xfs_lookup_t;
 147
 148 typedef enum {
 149         XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
 150         XFS_BTNUM_MAX
 151 } xfs_btnum_t;
 152
 153 struct xfs_name {
 154         const unsigned char     *name;
 155         int                     len;
 156 };
 157
 158 #endif  /* __XFS_TYPES_H__ */