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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 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_agino_t; /* inode # within allocation grp */
61 typedef __uint32_t xfs_extlen_t; /* extent length in blocks */
62 typedef __uint32_t xfs_agnumber_t; /* allocation group number */
63 typedef __int32_t xfs_extnum_t; /* # of extents in a file */
64 typedef __int16_t xfs_aextnum_t; /* # extents in an attribute fork */
65 typedef __int64_t xfs_fsize_t; /* bytes in a file */
66 typedef __uint64_t xfs_ufsize_t; /* unsigned bytes in a file */
67 
68 typedef __int32_t xfs_suminfo_t; /* type of bitmap summary info */
69 typedef __int32_t xfs_rtword_t; /* word type for bitmap manipulations */
70 
71 typedef __int64_t xfs_lsn_t; /* log sequence number */
72 typedef __int32_t xfs_tid_t; /* transaction identifier */
73 
74 typedef __uint32_t xfs_dablk_t; /* dir/attr block number (in file) */
75 typedef __uint32_t xfs_dahash_t; /* dir/attr hash value */
76 
77 /*
78  * These types are 64 bits on disk but are either 32 or 64 bits in memory.
79  * Disk based types:
80  */
81 typedef __uint64_t xfs_dfsbno_t; /* blockno in filesystem (agno|agbno) */
82 typedef __uint64_t xfs_drfsbno_t; /* blockno in filesystem (raw) */
83 typedef __uint64_t xfs_drtbno_t; /* extent (block) in realtime area */
84 typedef __uint64_t xfs_dfiloff_t; /* block number in a file */
85 typedef __uint64_t xfs_dfilblks_t; /* number of blocks in a file */
86 
87 /*
88  * Memory based types are conditional.
89  */
90 #if XFS_BIG_BLKNOS
91 typedef __uint64_t xfs_fsblock_t; /* blockno in filesystem (agno|agbno) */
92 typedef __uint64_t xfs_rfsblock_t; /* blockno in filesystem (raw) */
93 typedef __uint64_t xfs_rtblock_t; /* extent (block) in realtime area */
94 typedef __int64_t xfs_srtblock_t; /* signed version of xfs_rtblock_t */
95 #else
96 typedef __uint32_t xfs_fsblock_t; /* blockno in filesystem (agno|agbno) */
97 typedef __uint32_t xfs_rfsblock_t; /* blockno in filesystem (raw) */
98 typedef __uint32_t xfs_rtblock_t; /* extent (block) in realtime area */
99 typedef __int32_t xfs_srtblock_t; /* signed version of xfs_rtblock_t */
100 #endif
101 typedef __uint64_t xfs_fileoff_t; /* block number in a file */
102 typedef __int64_t xfs_sfiloff_t; /* signed block number in a file */
103 typedef __uint64_t xfs_filblks_t; /* number of blocks in a file */
104 
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 #define NULLFSINO ((xfs_ino_t)-1)
126 #define NULLAGINO ((xfs_agino_t)-1)
127 
128 /*
129  * Max values for extlen, extnum, aextnum.
130  */
131 #define MAXEXTLEN ((xfs_extlen_t)0x001fffff) /* 21 bits */
132 #define MAXEXTNUM ((xfs_extnum_t)0x7fffffff) /* signed int */
133 #define MAXAEXTNUM ((xfs_aextnum_t)0x7fff) /* signed short */
134 
135 /*
136  * Minimum and maximum blocksize and sectorsize.
137  * The blocksize upper limit is pretty much arbitrary.
138  * The sectorsize upper limit is due to sizeof(sb_sectsize).
139  */
140 #define XFS_MIN_BLOCKSIZE_LOG 9 /* i.e. 512 bytes */
141 #define XFS_MAX_BLOCKSIZE_LOG 16 /* i.e. 65536 bytes */
142 #define XFS_MIN_BLOCKSIZE (1 << XFS_MIN_BLOCKSIZE_LOG)
143 #define XFS_MAX_BLOCKSIZE (1 << XFS_MAX_BLOCKSIZE_LOG)
144 #define XFS_MIN_SECTORSIZE_LOG 9 /* i.e. 512 bytes */
145 #define XFS_MAX_SECTORSIZE_LOG 15 /* i.e. 32768 bytes */
146 #define XFS_MIN_SECTORSIZE (1 << XFS_MIN_SECTORSIZE_LOG)
147 #define XFS_MAX_SECTORSIZE (1 << XFS_MAX_SECTORSIZE_LOG)
148 
149 /*
150  * Min numbers of data/attr fork btree root pointers.
151  */
152 #define MINDBTPTRS 3
153 #define MINABTPTRS 2
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 enum {
163 } xfs_lookup_t;
164 
165 typedef enum {
168 } xfs_btnum_t;
169 
170 struct xfs_name {
171  const unsigned char *name;
172  int len;
173 };
174 
175 #endif /* __XFS_TYPES_H__ */