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TOMOYO Linux Cross Reference
Linux/fs/xfs/xfs_types.h

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  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__ */
175 

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