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
 21typedef __uint32_t	prid_t;		/* project ID */
 22
 23typedef __uint32_t	xfs_agblock_t;	/* blockno in alloc. group */
 24typedef	__uint32_t	xfs_agino_t;	/* inode # within allocation grp */
 25typedef	__uint32_t	xfs_extlen_t;	/* extent length in blocks */
 26typedef	__uint32_t	xfs_agnumber_t;	/* allocation group number */
 27typedef __int32_t	xfs_extnum_t;	/* # of extents in a file */
 28typedef __int16_t	xfs_aextnum_t;	/* # extents in an attribute fork */
 29typedef	__int64_t	xfs_fsize_t;	/* bytes in a file */
 30typedef __uint64_t	xfs_ufsize_t;	/* unsigned bytes in a file */
 31
 32typedef	__int32_t	xfs_suminfo_t;	/* type of bitmap summary info */
 33typedef	__int32_t	xfs_rtword_t;	/* word type for bitmap manipulations */
 34
 35typedef	__int64_t	xfs_lsn_t;	/* log sequence number */
 36typedef	__int32_t	xfs_tid_t;	/* transaction identifier */
 37
 38typedef	__uint32_t	xfs_dablk_t;	/* dir/attr block number (in file) */
 39typedef	__uint32_t	xfs_dahash_t;	/* dir/attr hash value */
 40
 41/*
 42 * These types are 64 bits on disk but are either 32 or 64 bits in memory.
 43 * Disk based types:
 44 */
 45typedef __uint64_t	xfs_dfsbno_t;	/* blockno in filesystem (agno|agbno) */
 46typedef __uint64_t	xfs_drfsbno_t;	/* blockno in filesystem (raw) */
 47typedef	__uint64_t	xfs_drtbno_t;	/* extent (block) in realtime area */
 48typedef	__uint64_t	xfs_dfiloff_t;	/* block number in a file */
 49typedef	__uint64_t	xfs_dfilblks_t;	/* number of blocks in a file */
 50
 51/*
 52 * Memory based types are conditional.
 53 */
 54#if XFS_BIG_BLKNOS
 55typedef	__uint64_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
 56typedef __uint64_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
 57typedef __uint64_t	xfs_rtblock_t;	/* extent (block) in realtime area */
 58typedef	__int64_t	xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
 59#else
 60typedef	__uint32_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
 61typedef __uint32_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
 62typedef __uint32_t	xfs_rtblock_t;	/* extent (block) in realtime area */
 63typedef	__int32_t	xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
 64#endif
 65typedef __uint64_t	xfs_fileoff_t;	/* block number in a file */
 66typedef __int64_t	xfs_sfiloff_t;	/* signed block number in a file */
 67typedef __uint64_t	xfs_filblks_t;	/* number of blocks in a file */
 68
 69
 70/*
 71 * Null values for the types.
 72 */
 73#define	NULLDFSBNO	((xfs_dfsbno_t)-1)
 74#define	NULLDRFSBNO	((xfs_drfsbno_t)-1)
 75#define	NULLDRTBNO	((xfs_drtbno_t)-1)
 76#define	NULLDFILOFF	((xfs_dfiloff_t)-1)
 77
 78#define	NULLFSBLOCK	((xfs_fsblock_t)-1)
 79#define	NULLRFSBLOCK	((xfs_rfsblock_t)-1)
 80#define	NULLRTBLOCK	((xfs_rtblock_t)-1)
 81#define	NULLFILEOFF	((xfs_fileoff_t)-1)
 82
 83#define	NULLAGBLOCK	((xfs_agblock_t)-1)
 84#define	NULLAGNUMBER	((xfs_agnumber_t)-1)
 85#define	NULLEXTNUM	((xfs_extnum_t)-1)
 86
 87#define NULLCOMMITLSN	((xfs_lsn_t)-1)
 88
 89#define	NULLFSINO	((xfs_ino_t)-1)
 90#define	NULLAGINO	((xfs_agino_t)-1)
 91
 92/*
 93 * Max values for extlen, extnum, aextnum.
 94 */
 95#define	MAXEXTLEN	((xfs_extlen_t)0x001fffff)	/* 21 bits */
 96#define	MAXEXTNUM	((xfs_extnum_t)0x7fffffff)	/* signed int */
 97#define	MAXAEXTNUM	((xfs_aextnum_t)0x7fff)		/* signed short */
 98
 99/*
100 * Minimum and maximum blocksize and sectorsize.
101 * The blocksize upper limit is pretty much arbitrary.
102 * The sectorsize upper limit is due to sizeof(sb_sectsize).
103 */
104#define XFS_MIN_BLOCKSIZE_LOG	9	/* i.e. 512 bytes */
105#define XFS_MAX_BLOCKSIZE_LOG	16	/* i.e. 65536 bytes */
106#define XFS_MIN_BLOCKSIZE	(1 << XFS_MIN_BLOCKSIZE_LOG)
107#define XFS_MAX_BLOCKSIZE	(1 << XFS_MAX_BLOCKSIZE_LOG)
108#define XFS_MIN_SECTORSIZE_LOG	9	/* i.e. 512 bytes */
109#define XFS_MAX_SECTORSIZE_LOG	15	/* i.e. 32768 bytes */
110#define XFS_MIN_SECTORSIZE	(1 << XFS_MIN_SECTORSIZE_LOG)
111#define XFS_MAX_SECTORSIZE	(1 << XFS_MAX_SECTORSIZE_LOG)
112
113/*
114 * Inode fork identifiers.
115 */
116#define	XFS_DATA_FORK	0
117#define	XFS_ATTR_FORK	1
118
119/*
120 * Min numbers of data/attr fork btree root pointers.
121 */
122#define MINDBTPTRS	3
123#define MINABTPTRS	2
124
125/*
126 * MAXNAMELEN is the length (including the terminating null) of
127 * the longest permissible file (component) name.
128 */
129#define MAXNAMELEN	256
130
131typedef enum {
132	XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
133} xfs_lookup_t;
134
135typedef enum {
136	XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
137	XFS_BTNUM_MAX
138} xfs_btnum_t;
139
140struct xfs_name {
141	const unsigned char	*name;
142	int			len;
143	int			type;
144};
145
146/*
147 * uid_t and gid_t are hard-coded to 32 bits in the inode.
148 * Hence, an 'id' in a dquot is 32 bits..
149 */
150typedef __uint32_t	xfs_dqid_t;
151
152/*
153 * Constants for bit manipulations.
154 */
155#define	XFS_NBBYLOG	3		/* log2(NBBY) */
156#define	XFS_WORDLOG	2		/* log2(sizeof(xfs_rtword_t)) */
157#define	XFS_NBWORDLOG	(XFS_NBBYLOG + XFS_WORDLOG)
158#define	XFS_NBWORD	(1 << XFS_NBWORDLOG)
159#define	XFS_WORDMASK	((1 << XFS_WORDLOG) - 1)
160
161
162#endif	/* __XFS_TYPES_H__ */