fs/xfs/xfs_types.h

   1 /*
   2  * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32 #ifndef __XFS_TYPES_H__
  33 #define __XFS_TYPES_H__
  34
  35 #ifdef __KERNEL__
  36
  37 /*
  38  * POSIX Extensions
  39  */
  40 typedef unsigned char           uchar_t;
  41 typedef unsigned short          ushort_t;
  42 typedef unsigned int            uint_t;
  43 typedef unsigned long           ulong_t;
  44
  45 /*
  46  * Additional type declarations for XFS
  47  */
  48 typedef signed char             __int8_t;
  49 typedef unsigned char           __uint8_t;
  50 typedef signed short int        __int16_t;
  51 typedef unsigned short int      __uint16_t;
  52 typedef signed int              __int32_t;
  53 typedef unsigned int            __uint32_t;
  54 typedef signed long long int    __int64_t;
  55 typedef unsigned long long int  __uint64_t;
  56
  57 typedef enum { B_FALSE,B_TRUE } boolean_t;
  58 typedef __int64_t               prid_t;         /* project ID */
  59 typedef __uint32_t              inst_t;         /* an instruction */
  60
  61 typedef __s64                   xfs_off_t;      /* <file offset> type */
  62 typedef __u64                   xfs_ino_t;      /* <inode> type */
  63 typedef __s64                   xfs_daddr_t;    /* <disk address> type */
  64 typedef char *                  xfs_caddr_t;    /* <core address> type */
  65 typedef __u32                   xfs_dev_t;
  66
  67 /* __psint_t is the same size as a pointer */
  68 #if (BITS_PER_LONG == 32)
  69 typedef __int32_t __psint_t;
  70 typedef __uint32_t __psunsigned_t;
  71 #elif (BITS_PER_LONG == 64)
  72 typedef __int64_t __psint_t;
  73 typedef __uint64_t __psunsigned_t;
  74 #else
  75 #error BITS_PER_LONG must be 32 or 64
  76 #endif
  77
  78 #endif  /* __KERNEL__ */
  79
  80 typedef __uint32_t      xfs_agblock_t;  /* blockno in alloc. group */
  81 typedef __uint32_t      xfs_extlen_t;   /* extent length in blocks */
  82 typedef __uint32_t      xfs_agnumber_t; /* allocation group number */
  83 typedef __int32_t       xfs_extnum_t;   /* # of extents in a file */
  84 typedef __int16_t       xfs_aextnum_t;  /* # extents in an attribute fork */
  85 typedef __int64_t       xfs_fsize_t;    /* bytes in a file */
  86 typedef __uint64_t      xfs_ufsize_t;   /* unsigned bytes in a file */
  87
  88 typedef __int32_t       xfs_suminfo_t;  /* type of bitmap summary info */
  89 typedef __int32_t       xfs_rtword_t;   /* word type for bitmap manipulations */
  90
  91 typedef __int64_t       xfs_lsn_t;      /* log sequence number */
  92 typedef __int32_t       xfs_tid_t;      /* transaction identifier */
  93
  94 typedef __uint32_t      xfs_dablk_t;    /* dir/attr block number (in file) */
  95 typedef __uint32_t      xfs_dahash_t;   /* dir/attr hash value */
  96
  97 typedef __uint16_t      xfs_prid_t;     /* prid_t truncated to 16bits in XFS */
  98
  99 /*
 100  * These types are 64 bits on disk but are either 32 or 64 bits in memory.
 101  * Disk based types:
 102  */
 103 typedef __uint64_t      xfs_dfsbno_t;   /* blockno in filesystem (agno|agbno) */
 104 typedef __uint64_t      xfs_drfsbno_t;  /* blockno in filesystem (raw) */
 105 typedef __uint64_t      xfs_drtbno_t;   /* extent (block) in realtime area */
 106 typedef __uint64_t      xfs_dfiloff_t;  /* block number in a file */
 107 typedef __uint64_t      xfs_dfilblks_t; /* number of blocks in a file */
 108
 109 /*
 110  * Memory based types are conditional.
 111  */
 112 #if XFS_BIG_BLKNOS
 113 typedef __uint64_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
 114 typedef __uint64_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
 115 typedef __uint64_t      xfs_rtblock_t;  /* extent (block) in realtime area */
 116 typedef __int64_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
 117 #else
 118 typedef __uint32_t      xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
 119 typedef __uint32_t      xfs_rfsblock_t; /* blockno in filesystem (raw) */
 120 typedef __uint32_t      xfs_rtblock_t;  /* extent (block) in realtime area */
 121 typedef __int32_t       xfs_srtblock_t; /* signed version of xfs_rtblock_t */
 122 #endif
 123 typedef __uint64_t      xfs_fileoff_t;  /* block number in a file */
 124 typedef __int64_t       xfs_sfiloff_t;  /* signed block number in a file */
 125 typedef __uint64_t      xfs_filblks_t;  /* number of blocks in a file */
 126
 127 typedef __uint8_t       xfs_arch_t;     /* architecture of an xfs fs */
 128
 129 /*
 130  * Null values for the types.
 131  */
 132 #define NULLDFSBNO      ((xfs_dfsbno_t)-1)
 133 #define NULLDRFSBNO     ((xfs_drfsbno_t)-1)
 134 #define NULLDRTBNO      ((xfs_drtbno_t)-1)
 135 #define NULLDFILOFF     ((xfs_dfiloff_t)-1)
 136
 137 #define NULLFSBLOCK     ((xfs_fsblock_t)-1)
 138 #define NULLRFSBLOCK    ((xfs_rfsblock_t)-1)
 139 #define NULLRTBLOCK     ((xfs_rtblock_t)-1)
 140 #define NULLFILEOFF     ((xfs_fileoff_t)-1)
 141
 142 #define NULLAGBLOCK     ((xfs_agblock_t)-1)
 143 #define NULLAGNUMBER    ((xfs_agnumber_t)-1)
 144 #define NULLEXTNUM      ((xfs_extnum_t)-1)
 145
 146 #define NULLCOMMITLSN   ((xfs_lsn_t)-1)
 147
 148 /*
 149  * Max values for extlen, extnum, aextnum.
 150  */
 151 #define MAXEXTLEN       ((xfs_extlen_t)0x001fffff)      /* 21 bits */
 152 #define MAXEXTNUM       ((xfs_extnum_t)0x7fffffff)      /* signed int */
 153 #define MAXAEXTNUM      ((xfs_aextnum_t)0x7fff)         /* signed short */
 154
 155 /*
 156  * MAXNAMELEN is the length (including the terminating null) of
 157  * the longest permissible file (component) name.
 158  */
 159 #define MAXNAMELEN      256
 160
 161 typedef struct xfs_dirent {             /* data from readdir() */
 162         xfs_ino_t       d_ino;          /* inode number of entry */
 163         xfs_off_t       d_off;          /* offset of disk directory entry */
 164         unsigned short  d_reclen;       /* length of this record */
 165         char            d_name[1];      /* name of file */
 166 } xfs_dirent_t;
 167
 168 #define DIRENTBASESIZE          (((xfs_dirent_t *)0)->d_name - (char *)0)
 169 #define DIRENTSIZE(namelen)     \
 170         ((DIRENTBASESIZE + (namelen) + \
 171                 sizeof(xfs_off_t)) & ~(sizeof(xfs_off_t) - 1))
 172
 173 typedef enum {
 174         XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 175 } xfs_lookup_t;
 176
 177 typedef enum {
 178         XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
 179         XFS_BTNUM_MAX
 180 } xfs_btnum_t;
 181
 182 #endif  /* __XFS_TYPES_H__ */