[deliverable/linux.git] / fs / xfs / xfs_inum.h

/*
 * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 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.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */
#ifndef __XFS_INUM_H__
#define	__XFS_INUM_H__

/*
 * Inode number format:
 * low inopblog bits - offset in block
 * next agblklog bits - block number in ag
 * next agno_log bits - ag number
 * high agno_log-agblklog-inopblog bits - 0
 */

typedef	__uint32_t	xfs_agino_t;	/* within allocation grp inode number */

/*
 * Useful inode bits for this kernel.
 * Used in some places where having 64-bits in the 32-bit kernels
 * costs too much.
 */
#if XFS_BIG_INUMS
typedef	xfs_ino_t	xfs_intino_t;
#else
typedef	__uint32_t	xfs_intino_t;
#endif

#define	NULLFSINO	((xfs_ino_t)-1)
#define	NULLAGINO	((xfs_agino_t)-1)

struct xfs_mount;

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_MASK)
__uint32_t xfs_ino_mask(int k);
#define	XFS_INO_MASK(k)			xfs_ino_mask(k)
#else
#define	XFS_INO_MASK(k)	((__uint32_t)((1ULL << (k)) - 1))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_OFFSET_BITS)
int xfs_ino_offset_bits(struct xfs_mount *mp);
#define	XFS_INO_OFFSET_BITS(mp)		xfs_ino_offset_bits(mp)
#else
#define	XFS_INO_OFFSET_BITS(mp)	((mp)->m_sb.sb_inopblog)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_AGBNO_BITS)
int xfs_ino_agbno_bits(struct xfs_mount *mp);
#define	XFS_INO_AGBNO_BITS(mp)		xfs_ino_agbno_bits(mp)
#else
#define	XFS_INO_AGBNO_BITS(mp)	((mp)->m_sb.sb_agblklog)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_AGINO_BITS)
int xfs_ino_agino_bits(struct xfs_mount *mp);
#define	XFS_INO_AGINO_BITS(mp)		xfs_ino_agino_bits(mp)
#else
#define	XFS_INO_AGINO_BITS(mp)		((mp)->m_agino_log)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_AGNO_BITS)
int xfs_ino_agno_bits(struct xfs_mount *mp);
#define	XFS_INO_AGNO_BITS(mp)		xfs_ino_agno_bits(mp)
#else
#define	XFS_INO_AGNO_BITS(mp)	((mp)->m_agno_log)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_BITS)
int xfs_ino_bits(struct xfs_mount *mp);
#define	XFS_INO_BITS(mp)		xfs_ino_bits(mp)
#else
#define	XFS_INO_BITS(mp)	(XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGNO)
xfs_agnumber_t xfs_ino_to_agno(struct xfs_mount *mp, xfs_ino_t i);
#define	XFS_INO_TO_AGNO(mp,i)		xfs_ino_to_agno(mp,i)
#else
#define	XFS_INO_TO_AGNO(mp,i)	\
	((xfs_agnumber_t)((i) >> XFS_INO_AGINO_BITS(mp)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGINO)
xfs_agino_t xfs_ino_to_agino(struct xfs_mount *mp, xfs_ino_t i);
#define	XFS_INO_TO_AGINO(mp,i)		xfs_ino_to_agino(mp,i)
#else
#define	XFS_INO_TO_AGINO(mp,i)	\
	((xfs_agino_t)(i) & XFS_INO_MASK(XFS_INO_AGINO_BITS(mp)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGBNO)
xfs_agblock_t xfs_ino_to_agbno(struct xfs_mount *mp, xfs_ino_t i);
#define	XFS_INO_TO_AGBNO(mp,i)		xfs_ino_to_agbno(mp,i)
#else
#define	XFS_INO_TO_AGBNO(mp,i)	\
	(((xfs_agblock_t)(i) >> XFS_INO_OFFSET_BITS(mp)) & \
	 XFS_INO_MASK(XFS_INO_AGBNO_BITS(mp)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_OFFSET)
int xfs_ino_to_offset(struct xfs_mount *mp, xfs_ino_t i);
#define	XFS_INO_TO_OFFSET(mp,i)		xfs_ino_to_offset(mp,i)
#else
#define	XFS_INO_TO_OFFSET(mp,i)	\
	((int)(i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_FSB)
xfs_fsblock_t xfs_ino_to_fsb(struct xfs_mount *mp, xfs_ino_t i);
#define	XFS_INO_TO_FSB(mp,i)		xfs_ino_to_fsb(mp,i)
#else
#define	XFS_INO_TO_FSB(mp,i)	\
	XFS_AGB_TO_FSB(mp, XFS_INO_TO_AGNO(mp,i), XFS_INO_TO_AGBNO(mp,i))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_INO)
xfs_ino_t
xfs_agino_to_ino(struct xfs_mount *mp, xfs_agnumber_t a, xfs_agino_t i);
#define	XFS_AGINO_TO_INO(mp,a,i)	xfs_agino_to_ino(mp,a,i)
#else
#define	XFS_AGINO_TO_INO(mp,a,i)	\
	(((xfs_ino_t)(a) << XFS_INO_AGINO_BITS(mp)) | (i))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_AGBNO)
xfs_agblock_t xfs_agino_to_agbno(struct xfs_mount *mp, xfs_agino_t i);
#define	XFS_AGINO_TO_AGBNO(mp,i)	xfs_agino_to_agbno(mp,i)
#else
#define	XFS_AGINO_TO_AGBNO(mp,i)	((i) >> XFS_INO_OFFSET_BITS(mp))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_OFFSET)
int xfs_agino_to_offset(struct xfs_mount *mp, xfs_agino_t i);
#define	XFS_AGINO_TO_OFFSET(mp,i)	xfs_agino_to_offset(mp,i)
#else
#define	XFS_AGINO_TO_OFFSET(mp,i)	\
	((i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_OFFBNO_TO_AGINO)
xfs_agino_t xfs_offbno_to_agino(struct xfs_mount *mp, xfs_agblock_t b, int o);
#define	XFS_OFFBNO_TO_AGINO(mp,b,o)	xfs_offbno_to_agino(mp,b,o)
#else
#define	XFS_OFFBNO_TO_AGINO(mp,b,o)	\
	((xfs_agino_t)(((b) << XFS_INO_OFFSET_BITS(mp)) | (o)))
#endif

#if XFS_BIG_INUMS
#define	XFS_MAXINUMBER		((xfs_ino_t)((1ULL << 56) - 1ULL))
#define	XFS_INO64_OFFSET	((xfs_ino_t)(1ULL << 32))
#else
#define	XFS_MAXINUMBER		((xfs_ino_t)((1ULL << 32) - 1ULL))
#endif
#define	XFS_MAXINUMBER_32	((xfs_ino_t)((1ULL << 32) - 1ULL))

#endif	/* __XFS_INUM_H__ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of version 2 of the GNU General Public License as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it would be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	11	*
	12	* Further, this software is distributed without any warranty that it is
	13	* free of the rightful claim of any third person regarding infringement
	14	* or the like. Any license provided herein, whether implied or
	15	* otherwise, applies only to this software file. Patent licenses, if
	16	* any, provided herein do not apply to combinations of this program with
	17	* other software, or any other product whatsoever.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write the Free Software Foundation, Inc., 59
	21	* Temple Place - Suite 330, Boston MA 02111-1307, USA.
	22	*
	23	* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
	24	* Mountain View, CA 94043, or:
	25	*
	26	* http://www.sgi.com
	27	*
	28	* For further information regarding this notice, see:
	29	*
	30	* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
	31	*/
	32	#ifndef __XFS_INUM_H__
	33	#define __XFS_INUM_H__
	34
	35	/*
	36	* Inode number format:
	37	* low inopblog bits - offset in block
	38	* next agblklog bits - block number in ag
	39	* next agno_log bits - ag number
	40	* high agno_log-agblklog-inopblog bits - 0
	41	*/
	42
	43	typedef __uint32_t xfs_agino_t; /* within allocation grp inode number */
	44
	45	/*
	46	* Useful inode bits for this kernel.
	47	* Used in some places where having 64-bits in the 32-bit kernels
	48	* costs too much.
	49	*/
	50	#if XFS_BIG_INUMS
	51	typedef xfs_ino_t xfs_intino_t;
	52	#else
	53	typedef __uint32_t xfs_intino_t;
	54	#endif
	55
	56	#define NULLFSINO ((xfs_ino_t)-1)
	57	#define NULLAGINO ((xfs_agino_t)-1)
	58
	59	struct xfs_mount;
	60
	61	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_MASK)
	62	__uint32_t xfs_ino_mask(int k);
	63	#define XFS_INO_MASK(k) xfs_ino_mask(k)
	64	#else
65	#define XFS_INO_MASK(k) ((__uint32_t)((1ULL << (k)) - 1))
66	#endif
67	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_OFFSET_BITS)
68	int xfs_ino_offset_bits(struct xfs_mount *mp);
69	#define XFS_INO_OFFSET_BITS(mp) xfs_ino_offset_bits(mp)
70	#else
71	#define XFS_INO_OFFSET_BITS(mp) ((mp)->m_sb.sb_inopblog)
72	#endif
73	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_AGBNO_BITS)
74	int xfs_ino_agbno_bits(struct xfs_mount *mp);
75	#define XFS_INO_AGBNO_BITS(mp) xfs_ino_agbno_bits(mp)
76	#else
77	#define XFS_INO_AGBNO_BITS(mp) ((mp)->m_sb.sb_agblklog)
78	#endif
79	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_AGINO_BITS)
80	int xfs_ino_agino_bits(struct xfs_mount *mp);
81	#define XFS_INO_AGINO_BITS(mp) xfs_ino_agino_bits(mp)
82	#else
83	#define XFS_INO_AGINO_BITS(mp) ((mp)->m_agino_log)
84	#endif
85	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_AGNO_BITS)
86	int xfs_ino_agno_bits(struct xfs_mount *mp);
87	#define XFS_INO_AGNO_BITS(mp) xfs_ino_agno_bits(mp)
88	#else
89	#define XFS_INO_AGNO_BITS(mp) ((mp)->m_agno_log)
90	#endif
91	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_BITS)
92	int xfs_ino_bits(struct xfs_mount *mp);
93	#define XFS_INO_BITS(mp) xfs_ino_bits(mp)
94	#else
95	#define XFS_INO_BITS(mp) (XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp))
96	#endif
97
98	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGNO)
99	xfs_agnumber_t xfs_ino_to_agno(struct xfs_mount *mp, xfs_ino_t i);
100	#define XFS_INO_TO_AGNO(mp,i) xfs_ino_to_agno(mp,i)
101	#else
102	#define XFS_INO_TO_AGNO(mp,i) \
103	((xfs_agnumber_t)((i) >> XFS_INO_AGINO_BITS(mp)))
104	#endif
105	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGINO)
106	xfs_agino_t xfs_ino_to_agino(struct xfs_mount *mp, xfs_ino_t i);
107	#define XFS_INO_TO_AGINO(mp,i) xfs_ino_to_agino(mp,i)
108	#else
109	#define XFS_INO_TO_AGINO(mp,i) \
110	((xfs_agino_t)(i) & XFS_INO_MASK(XFS_INO_AGINO_BITS(mp)))
111	#endif
112	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_AGBNO)
113	xfs_agblock_t xfs_ino_to_agbno(struct xfs_mount *mp, xfs_ino_t i);
114	#define XFS_INO_TO_AGBNO(mp,i) xfs_ino_to_agbno(mp,i)
115	#else
116	#define XFS_INO_TO_AGBNO(mp,i) \
117	(((xfs_agblock_t)(i) >> XFS_INO_OFFSET_BITS(mp)) & \
118	XFS_INO_MASK(XFS_INO_AGBNO_BITS(mp)))
119	#endif
120	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_OFFSET)
121	int xfs_ino_to_offset(struct xfs_mount *mp, xfs_ino_t i);
122	#define XFS_INO_TO_OFFSET(mp,i) xfs_ino_to_offset(mp,i)
123	#else
124	#define XFS_INO_TO_OFFSET(mp,i) \
125	((int)(i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp)))
126	#endif
127	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_INO_TO_FSB)
128	xfs_fsblock_t xfs_ino_to_fsb(struct xfs_mount *mp, xfs_ino_t i);
129	#define XFS_INO_TO_FSB(mp,i) xfs_ino_to_fsb(mp,i)
130	#else
131	#define XFS_INO_TO_FSB(mp,i) \
132	XFS_AGB_TO_FSB(mp, XFS_INO_TO_AGNO(mp,i), XFS_INO_TO_AGBNO(mp,i))
133	#endif
134
135	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_INO)
136	xfs_ino_t
137	xfs_agino_to_ino(struct xfs_mount *mp, xfs_agnumber_t a, xfs_agino_t i);
138	#define XFS_AGINO_TO_INO(mp,a,i) xfs_agino_to_ino(mp,a,i)
139	#else
140	#define XFS_AGINO_TO_INO(mp,a,i) \
141	(((xfs_ino_t)(a) << XFS_INO_AGINO_BITS(mp)) \| (i))
142	#endif
143	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_AGBNO)
144	xfs_agblock_t xfs_agino_to_agbno(struct xfs_mount *mp, xfs_agino_t i);
145	#define XFS_AGINO_TO_AGBNO(mp,i) xfs_agino_to_agbno(mp,i)
146	#else
147	#define XFS_AGINO_TO_AGBNO(mp,i) ((i) >> XFS_INO_OFFSET_BITS(mp))
148	#endif
149	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_AGINO_TO_OFFSET)
150	int xfs_agino_to_offset(struct xfs_mount *mp, xfs_agino_t i);
151	#define XFS_AGINO_TO_OFFSET(mp,i) xfs_agino_to_offset(mp,i)
152	#else
153	#define XFS_AGINO_TO_OFFSET(mp,i) \
154	((i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp)))
155	#endif
156
157	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_OFFBNO_TO_AGINO)
158	xfs_agino_t xfs_offbno_to_agino(struct xfs_mount *mp, xfs_agblock_t b, int o);
159	#define XFS_OFFBNO_TO_AGINO(mp,b,o) xfs_offbno_to_agino(mp,b,o)
160	#else
161	#define XFS_OFFBNO_TO_AGINO(mp,b,o) \
162	((xfs_agino_t)(((b) << XFS_INO_OFFSET_BITS(mp)) \| (o)))
163	#endif
164
165	#if XFS_BIG_INUMS
166	#define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 56) - 1ULL))
167	#define XFS_INO64_OFFSET ((xfs_ino_t)(1ULL << 32))
168	#else
169	#define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 32) - 1ULL))
170	#endif
171	#define XFS_MAXINUMBER_32 ((xfs_ino_t)((1ULL << 32) - 1ULL))
172
173	#endif /* __XFS_INUM_H__ */