extlinux/xfs_types.h

   1 /*
   2  * Taken from Linux kernel tree (linux/fs/xfs)
   3  *
   4  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   5  * All Rights Reserved.
   6  *
   7  * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it would be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write the Free Software Foundation,
  20  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21  */
  22 #ifndef XFS_TYPES_H_
  23 #define XFS_TYPES_H_
  24
  25 #include <stddef.h>
  26
  27 #include <sys/types.h>
  28
  29 typedef enum { B_FALSE,B_TRUE } boolean_t;
  30 typedef uint32_t                prid_t;         /* project ID */
  31 typedef uint32_t                inst_t;         /* an instruction */
  32
  33 typedef int64_t                 xfs_off_t;      /* <file offset> type */
  34 typedef unsigned long long      xfs_ino_t;      /* <inode> type */
  35 typedef int64_t                 xfs_daddr_t;    /* <disk address> type */
  36 typedef char *                  xfs_caddr_t;    /* <core address> type */
  37 typedef uint32_t                        xfs_dev_t;
  38 typedef uint32_t                        xfs_nlink_t;
  39
  40 /* __psint_t is the same size as a pointer */
  41 typedef int32_t __psint_t;
  42 typedef uint32_t __psunsigned_t;
  43
  44 typedef uint32_t        xfs_agblock_t;  /* blockno in alloc. group */
  45 typedef uint32_t        xfs_extlen_t;   /* extent length in blocks */
  46 typedef uint32_t        xfs_agnumber_t; /* allocation group number */
  47 typedef int32_t xfs_extnum_t;   /* # of extents in a file */
  48 typedef int16_t xfs_aextnum_t;  /* # extents in an attribute fork */
  49 typedef int64_t xfs_fsize_t;    /* bytes in a file */
  50 typedef uint64_t        xfs_ufsize_t;   /* unsigned bytes in a file */
  51
  52 typedef int32_t xfs_suminfo_t;  /* type of bitmap summary info */
  53 typedef int32_t xfs_rtword_t;   /* word type for bitmap manipulations */
  54
  55 typedef int64_t xfs_lsn_t;      /* log sequence number */
  56 typedef int32_t xfs_tid_t;      /* transaction identifier */
  57
  58 typedef uint32_t        xfs_dablk_t;    /* dir/attr block number (in file) */
  59 typedef uint32_t        xfs_dahash_t;   /* dir/attr hash value */
  60
  61 /*
  62  * These types are 64 bits on disk but are either 32 or 64 bits in memory.
  63  * Disk based types:
  64  */
  65 typedef uint64_t        xfs_dfsbno_t;   /* blockno in filesystem (agno|agbno) */
  66 typedef uint64_t        xfs_drfsbno_t;  /* blockno in filesystem (raw) */
  67 typedef uint64_t        xfs_drtbno_t;   /* extent (block) in realtime area */
  68 typedef uint64_t        xfs_dfiloff_t;  /* block number in a file */
  69 typedef uint64_t        xfs_dfilblks_t; /* number of blocks in a file */
  70
  71 /*
  72  * Memory based types are conditional.
  73  */
  74 typedef uint64_t        xfs_fsblock_t;  /* blockno in filesystem (agno|agbno) */
  75 typedef uint64_t        xfs_rfsblock_t; /* blockno in filesystem (raw) */
  76 typedef uint64_t        xfs_rtblock_t;  /* extent (block) in realtime area */
  77 typedef int64_t xfs_srtblock_t; /* signed version of xfs_rtblock_t */
  78
  79 typedef uint64_t        xfs_fileoff_t;  /* block number in a file */
  80 typedef int64_t xfs_sfiloff_t;  /* signed block number in a file */
  81 typedef uint64_t        xfs_filblks_t;  /* number of blocks in a file */
  82
  83 /*
  84  * Null values for the types.
  85  */
  86 #define NULLDFSBNO      ((xfs_dfsbno_t)-1)
  87 #define NULLDRFSBNO     ((xfs_drfsbno_t)-1)
  88 #define NULLDRTBNO      ((xfs_drtbno_t)-1)
  89 #define NULLDFILOFF     ((xfs_dfiloff_t)-1)
  90
  91 #define NULLFSBLOCK     ((xfs_fsblock_t)-1)
  92 #define NULLRFSBLOCK    ((xfs_rfsblock_t)-1)
  93 #define NULLRTBLOCK     ((xfs_rtblock_t)-1)
  94 #define NULLFILEOFF     ((xfs_fileoff_t)-1)
  95
  96 #define NULLAGBLOCK     ((xfs_agblock_t)-1)
  97 #define NULLAGNUMBER    ((xfs_agnumber_t)-1)
  98 #define NULLEXTNUM      ((xfs_extnum_t)-1)
  99
 100 #define NULLCOMMITLSN   ((xfs_lsn_t)-1)
 101
 102 /*
 103  * Max values for extlen, extnum, aextnum.
 104  */
 105 #define MAXEXTLEN       ((xfs_extlen_t)0x001fffff)      /* 21 bits */
 106 #define MAXEXTNUM       ((xfs_extnum_t)0x7fffffff)      /* signed int */
 107 #define MAXAEXTNUM      ((xfs_aextnum_t)0x7fff)         /* signed short */
 108
 109 /*
 110  * Min numbers of data/attr fork btree root pointers.
 111  */
 112 #define MINDBTPTRS      3
 113 #define MINABTPTRS      2
 114
 115 /*
 116  * MAXNAMELEN is the length (including the terminating null) of
 117  * the longest permissible file (component) name.
 118  */
 119 #define MAXNAMELEN      256
 120
 121 typedef enum {
 122         XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
 123 } xfs_lookup_t;
 124
 125 typedef enum {
 126         XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
 127         XFS_BTNUM_MAX
 128 } xfs_btnum_t;
 129
 130 struct xfs_name {
 131         const unsigned char     *name;
 132         int                     len;
 133 };
 134
 135 #endif  /* XFS_TYPES_H_ */