/*
* 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__ */
