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  * POSIX Extensions
  25  */
  26 typedef unsigned char           uchar_t;
  27 typedef unsigned short          ushort_t;
  28 typedef unsigned int            uint_t;
  29 typedef unsigned long           ulong_t;
  30
  31 /*
  32  * Additional type declarations for XFS
  33  */
  34 typedef signed char             __int8_t;
  35 typedef unsigned char           __uint8_t;
  36 typedef signed short int        __int16_t;
  37 typedef unsigned short int      __uint16_t;
  38 typedef signed int              __int32_t;
  39 typedef unsigned int            __uint32_t;
  40 typedef signed long long int    __int64_t;
  41 typedef unsigned long long int  __uint64_t;
  42
  43 typedef enum { B_FALSE,B_TRUE } boolean_t;
  44 typedef __uint32_t              prid_t;         /* project ID */
  45 typedef __uint32_t              inst_t;         /* an instruction */
  46
  47 typedef __s64                   xfs_off_t;      /* <file offset> type */
  48 typedef __u64                   xfs_ino_t;      /* <inode> type */
  49 typedef __s64                   xfs_daddr_t;    /* <disk address> type */
  50 typedef char *                  xfs_caddr_t;    /* <core address> type */
  51 typedef __u32                   xfs_dev_t;
  52 typedef __u32                   xfs_nlink_t;
  53
  54 /* __psint_t is the same size as a pointer */
  55 #if (BITS_PER_LONG == 32)
  56 typedef __int32_t __psint_t;
  57 typedef __uint32_t __psunsigned_t;
  58 #elif (BITS_PER_LONG == 64)
  59 typedef __int64_t __psint_t;
  60 typedef __uint64_t __psunsigned_t;
  61 #else
  62 #error BITS_PER_LONG must be 32 or 64
  63 #endif
  64
  65 #endif  /* __KERNEL__ */
  66
  67 typedef __uint32_t      xfs_agblock_t;  /* blockno in alloc. group */
  68 typedef __uint32_t      xfs_extlen_t;   /* extent length in blocks */
  69 typedef __uint32_t      xfs_agnumber_t; /* allocation group number */
  70 typedef __int32_t       xfs_extnum_t;   /* # of extents in a file */
  71 typedef __int16_t       xfs_aextnum_t;  /* # extents in an attribute fork */
  72 typedef __int64_t       xfs_fsize_t;    /* bytes in a file */
  73 typedef __uint64_t      xfs_ufsize_t;   /* unsigned bytes in a file */
  74
  75 typedef __int32_t       xfs_suminfo_t;  /* type of bitmap summary info */
  76 typedef __int32_t       xfs_rtword_t;   /* word type for bitmap manipulations */
  77
  78 typedef __int64_t       xfs_lsn_t;      /* log sequence number */
  79 typedef __int32_t       xfs_tid_t;      /* transaction identifier */
  80
  81 typedef __uint32_t      xfs_dablk_t;    /* dir/attr block number (in file) */
  82 typedef __uint32_t      xfs_dahash_t;   /* dir/attr hash value */
  83
  84 typedef __uint16_t      xfs_prid_t;     /* prid_t truncated to 16bits in XFS */
  85
  86 /*
  87  * These types are 64 bits on disk but are either 32 or 64 bits in memory.
  88  * Disk based types:
  89  */
  90 typedef __uint64_t      xfs_dfsbno_t;   /* blockno in filesystem (agno|agbno) */
  91 typedef __uint64_t      xfs_drfsbno_t;  /* blockno in filesystem (raw) */
  92 typedef __uint64_t      xfs_drtbno_t;   /* extent (block) in realtime area */
  93 typedef __uint64_t      xfs_dfiloff_t;  /* block number in a file */
  94 typedef __uint64_t      xfs_dfilblks_t; /* number of blocks in a file */
  95
  96 /*
  97  * Memory based types are conditional.
  98  */
  99 #if XFS_BIG_BLKNOS
 100 typedef __uint64_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
 101 typedef __uint64_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
 102 typedef __uint64_t      xfs_rtblock_t;  /* extent (block) in realtime area */
 103 typedef __int64_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
 104 #else
 105 typedef __uint32_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
 106 typedef __uint32_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
 107 typedef __uint32_t      xfs_rtblock_t;  /* extent (block) in realtime area */
 108 typedef __int32_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
 109 #endif
 110 typedef __uint64_t      xfs_fileoff_t;  /* block number in a file */
 111 typedef __int64_t       xfs_sfiloff_t;  /* signed block number in a file */
 112 typedef __uint64_t      xfs_filblks_t;  /* number of blocks in a file */
 113
 114 typedef __uint8_t       xfs_arch_t;     /* architecture of an xfs fs */
 115
 116 /*
 117  * Null values for the types.
 118  */
 119 #define NULLDFSBNO      ((xfs_dfsbno_t)-1)
 120 #define NULLDRFSBNO     ((xfs_drfsbno_t)-1)
 121 #define NULLDRTBNO      ((xfs_drtbno_t)-1)
 122 #define NULLDFILOFF     ((xfs_dfiloff_t)-1)
 123
 124 #define NULLFSBLOCK     ((xfs_fsblock_t)-1)
 125 #define NULLRFSBLOCK    ((xfs_rfsblock_t)-1)
 126 #define NULLRTBLOCK     ((xfs_rtblock_t)-1)
 127 #define NULLFILEOFF     ((xfs_fileoff_t)-1)
 128
 129 #define NULLAGBLOCK     ((xfs_agblock_t)-1)
 130 #define NULLAGNUMBER    ((xfs_agnumber_t)-1)
 131 #define NULLEXTNUM      ((xfs_extnum_t)-1)
 132
 133 #define NULLCOMMITLSN   ((xfs_lsn_t)-1)
 134
 135 /*
 136  * Max values for extlen, extnum, aextnum.
 137  */
 138 #define MAXEXTLEN       ((xfs_extlen_t)0x001fffff)      /* 21 bits */
 139 #define MAXEXTNUM       ((xfs_extnum_t)0x7fffffff)      /* signed int */
 140 #define MAXAEXTNUM      ((xfs_aextnum_t)0x7fff)         /* signed short */
 141
 142 /*
 143  * Min numbers of data/attr fork btree root pointers.
 144  */
 145 #define MINDBTPTRS      3
 146 #define MINABTPTRS      2
 147
 148 /*
 149  * MAXNAMELEN is the length (including the terminating null) of
 150  * the longest permissible file (component) name.
 151  */
 152 #define MAXNAMELEN      256
 153
 154 typedef struct xfs_dirent {             /* data from readdir() */
 155         xfs_ino_t       d_ino;          /* inode number of entry */
 156         xfs_off_t       d_off;          /* offset of disk directory entry */
 157         unsigned short  d_reclen;       /* length of this record */
 158         char            d_name[1];      /* name of file */
 159 } xfs_dirent_t;
 160
 161 #define DIRENTBASESIZE          (((xfs_dirent_t *)0)->d_name - (char *)0)
 162 #define DIRENTSIZE(namelen)     \
 163         ((DIRENTBASESIZE + (namelen) + \
 164                 sizeof(xfs_off_t)) & ~(sizeof(xfs_off_t) - 1))
 165
 166 typedef enum {
 167         XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 168 } xfs_lookup_t;
 169
 170 typedef enum {
 171         XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
 172         XFS_BTNUM_MAX
 173 } xfs_btnum_t;
 174
 175 #endif  /* __XFS_TYPES_H__ */