[linux-2.6-block.git] / fs / xfs / xfs_types.h

/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_TYPES_H__
#define	__XFS_TYPES_H__

#ifdef __KERNEL__

/*
 * Additional type declarations for XFS
 */
typedef signed char		__int8_t;
typedef unsigned char		__uint8_t;
typedef signed short int	__int16_t;
typedef unsigned short int	__uint16_t;
typedef signed int		__int32_t;
typedef unsigned int		__uint32_t;
typedef signed long long int	__int64_t;
typedef unsigned long long int	__uint64_t;

typedef enum { B_FALSE,B_TRUE }	boolean_t;
typedef __uint32_t		prid_t;		/* project ID */
typedef __uint32_t		inst_t;		/* an instruction */

typedef __s64			xfs_off_t;	/* <file offset> type */
typedef unsigned long long	xfs_ino_t;	/* <inode> type */
typedef __s64			xfs_daddr_t;	/* <disk address> type */
typedef char *			xfs_caddr_t;	/* <core address> type */
typedef __u32			xfs_dev_t;
typedef __u32			xfs_nlink_t;

/* __psint_t is the same size as a pointer */
#if (BITS_PER_LONG == 32)
typedef __int32_t __psint_t;
typedef __uint32_t __psunsigned_t;
#elif (BITS_PER_LONG == 64)
typedef __int64_t __psint_t;
typedef __uint64_t __psunsigned_t;
#else
#error BITS_PER_LONG must be 32 or 64
#endif

#endif	/* __KERNEL__ */

typedef __uint32_t	xfs_agblock_t;	/* blockno in alloc. group */
typedef	__uint32_t	xfs_extlen_t;	/* extent length in blocks */
typedef	__uint32_t	xfs_agnumber_t;	/* allocation group number */
typedef __int32_t	xfs_extnum_t;	/* # of extents in a file */
typedef __int16_t	xfs_aextnum_t;	/* # extents in an attribute fork */
typedef	__int64_t	xfs_fsize_t;	/* bytes in a file */
typedef __uint64_t	xfs_ufsize_t;	/* unsigned bytes in a file */

typedef	__int32_t	xfs_suminfo_t;	/* type of bitmap summary info */
typedef	__int32_t	xfs_rtword_t;	/* word type for bitmap manipulations */

typedef	__int64_t	xfs_lsn_t;	/* log sequence number */
typedef	__int32_t	xfs_tid_t;	/* transaction identifier */

typedef	__uint32_t	xfs_dablk_t;	/* dir/attr block number (in file) */
typedef	__uint32_t	xfs_dahash_t;	/* dir/attr hash value */

typedef __uint16_t	xfs_prid_t;	/* prid_t truncated to 16bits in XFS */

typedef __uint32_t	xlog_tid_t;	/* transaction ID type */

/*
 * These types are 64 bits on disk but are either 32 or 64 bits in memory.
 * Disk based types:
 */
typedef __uint64_t	xfs_dfsbno_t;	/* blockno in filesystem (agno|agbno) */
typedef __uint64_t	xfs_drfsbno_t;	/* blockno in filesystem (raw) */
typedef	__uint64_t	xfs_drtbno_t;	/* extent (block) in realtime area */
typedef	__uint64_t	xfs_dfiloff_t;	/* block number in a file */
typedef	__uint64_t	xfs_dfilblks_t;	/* number of blocks in a file */

/*
 * Memory based types are conditional.
 */
#if XFS_BIG_BLKNOS
typedef	__uint64_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
typedef __uint64_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
typedef __uint64_t	xfs_rtblock_t;	/* extent (block) in realtime area */
typedef	__int64_t	xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
#else
typedef	__uint32_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
typedef __uint32_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
typedef __uint32_t	xfs_rtblock_t;	/* extent (block) in realtime area */
typedef	__int32_t	xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
#endif
typedef __uint64_t	xfs_fileoff_t;	/* block number in a file */
typedef __int64_t	xfs_sfiloff_t;	/* signed block number in a file */
typedef __uint64_t	xfs_filblks_t;	/* number of blocks in a file */

/*
 * Null values for the types.
 */
#define	NULLDFSBNO	((xfs_dfsbno_t)-1)
#define	NULLDRFSBNO	((xfs_drfsbno_t)-1)
#define	NULLDRTBNO	((xfs_drtbno_t)-1)
#define	NULLDFILOFF	((xfs_dfiloff_t)-1)

#define	NULLFSBLOCK	((xfs_fsblock_t)-1)
#define	NULLRFSBLOCK	((xfs_rfsblock_t)-1)
#define	NULLRTBLOCK	((xfs_rtblock_t)-1)
#define	NULLFILEOFF	((xfs_fileoff_t)-1)

#define	NULLAGBLOCK	((xfs_agblock_t)-1)
#define	NULLAGNUMBER	((xfs_agnumber_t)-1)
#define	NULLEXTNUM	((xfs_extnum_t)-1)

#define NULLCOMMITLSN	((xfs_lsn_t)-1)

/*
 * Max values for extlen, extnum, aextnum.
 */
#define	MAXEXTLEN	((xfs_extlen_t)0x001fffff)	/* 21 bits */
#define	MAXEXTNUM	((xfs_extnum_t)0x7fffffff)	/* signed int */
#define	MAXAEXTNUM	((xfs_aextnum_t)0x7fff)		/* signed short */

/*
 * Min numbers of data/attr fork btree root pointers.
 */
#define MINDBTPTRS	3
#define MINABTPTRS	2

/*
 * MAXNAMELEN is the length (including the terminating null) of
 * the longest permissible file (component) name.
 */
#define MAXNAMELEN	256

typedef enum {
	XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
} xfs_lookup_t;

typedef enum {
	XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
	XFS_BTNUM_MAX
} xfs_btnum_t;

struct xfs_name {
	const unsigned char	*name;
	int			len;
};

#endif	/* __XFS_TYPES_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	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.
1da177e4	13	*
7b718769 NS	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
1da177e4 LT	17	*/
	18	#ifndef __XFS_TYPES_H__
	19	#define __XFS_TYPES_H__
	20
	21	#ifdef __KERNEL__
	22
1da177e4 LT	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;
b74e2159	36	typedef __uint32_t prid_t; /* project ID */
1da177e4 LT	37	typedef __uint32_t inst_t; /* an instruction */
	38
	39	typedef __s64 xfs_off_t; /* <file offset> type */
058652a3	40	typedef unsigned long long xfs_ino_t; /* <inode> type */
1da177e4 LT	41	typedef __s64 xfs_daddr_t; /* <disk address> type */
	42	typedef char * xfs_caddr_t; /* <core address> type */
	43	typedef __u32 xfs_dev_t;
31b084ae	44	typedef __u32 xfs_nlink_t;
1da177e4 LT	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_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	typedef __uint16_t xfs_prid_t; /* prid_t truncated to 16bits in XFS */
	77
955833cf DC	78	typedef __uint32_t xlog_tid_t; /* transaction ID type */
955833cf DC	79
1da177e4 LT	80	/*
	81	* These types are 64 bits on disk but are either 32 or 64 bits in memory.
	82	* Disk based types:
	83	*/
	84	typedef __uint64_t xfs_dfsbno_t; /* blockno in filesystem (agno\|agbno) */
	85	typedef __uint64_t xfs_drfsbno_t; /* blockno in filesystem (raw) */
	86	typedef __uint64_t xfs_drtbno_t; /* extent (block) in realtime area */
	87	typedef __uint64_t xfs_dfiloff_t; /* block number in a file */
	88	typedef __uint64_t xfs_dfilblks_t; /* number of blocks in a file */
	89
	90	/*
	91	* Memory based types are conditional.
	92	*/
	93	#if XFS_BIG_BLKNOS
	94	typedef __uint64_t xfs_fsblock_t; /* blockno in filesystem (agno\|agbno) */
	95	typedef __uint64_t xfs_rfsblock_t; /* blockno in filesystem (raw) */
	96	typedef __uint64_t xfs_rtblock_t; /* extent (block) in realtime area */
	97	typedef __int64_t xfs_srtblock_t; /* signed version of xfs_rtblock_t */
	98	#else
	99	typedef __uint32_t xfs_fsblock_t; /* blockno in filesystem (agno\|agbno) */
	100	typedef __uint32_t xfs_rfsblock_t; /* blockno in filesystem (raw) */
	101	typedef __uint32_t xfs_rtblock_t; /* extent (block) in realtime area */
	102	typedef __int32_t xfs_srtblock_t; /* signed version of xfs_rtblock_t */
	103	#endif
	104	typedef __uint64_t xfs_fileoff_t; /* block number in a file */
	105	typedef __int64_t xfs_sfiloff_t; /* signed block number in a file */
	106	typedef __uint64_t xfs_filblks_t; /* number of blocks in a file */
	107
1da177e4 LT	108	/*
	109	* Null values for the types.
	110	*/
	111	#define NULLDFSBNO ((xfs_dfsbno_t)-1)
	112	#define NULLDRFSBNO ((xfs_drfsbno_t)-1)
	113	#define NULLDRTBNO ((xfs_drtbno_t)-1)
	114	#define NULLDFILOFF ((xfs_dfiloff_t)-1)
	115
	116	#define NULLFSBLOCK ((xfs_fsblock_t)-1)
	117	#define NULLRFSBLOCK ((xfs_rfsblock_t)-1)
	118	#define NULLRTBLOCK ((xfs_rtblock_t)-1)
	119	#define NULLFILEOFF ((xfs_fileoff_t)-1)
	120
	121	#define NULLAGBLOCK ((xfs_agblock_t)-1)
	122	#define NULLAGNUMBER ((xfs_agnumber_t)-1)
	123	#define NULLEXTNUM ((xfs_extnum_t)-1)
	124
	125	#define NULLCOMMITLSN ((xfs_lsn_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
d8cc890d NS	134	/*
	135	* Min numbers of data/attr fork btree root pointers.
	136	*/
	137	#define MINDBTPTRS 3
	138	#define MINABTPTRS 2
	139
1da177e4 LT	140	/*
	141	* MAXNAMELEN is the length (including the terminating null) of
	142	* the longest permissible file (component) name.
	143	*/
	144	#define MAXNAMELEN 256
	145
1da177e4 LT	146	typedef enum {
	147	XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
	148	} xfs_lookup_t;
	149
	150	typedef enum {
	151	XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
	152	XFS_BTNUM_MAX
	153	} xfs_btnum_t;
	154
556b8b16	155	struct xfs_name {
e2bcd936 DC	156	const unsigned char *name;
e2bcd936 DC	157	int len;
556b8b16 BN	158	};
556b8b16 BN	159
1da177e4	160	#endif /* __XFS_TYPES_H__ */