Return to xfs_inum.h CVS log

Up to [Development] / xfs-linux

auto-merge of changes from /hosts/clyde/proj/banyan/isms/irix/kern/fs/xfs/RCS/xfs_inum.h,v
> ----------------------------
> revision 1.14
> date: 1995/09/22 02:24:16;  author: doucette;  state: Exp;  lines: +14 -2
> Add xfs_intino_t type for performance.  Fix inode number overflow
> checking code.
> =============================================================================

#ifndef _FS_XFS_INUM_H
#define	_FS_XFS_INUM_H

#ident	"$Revision$"

/*
 * 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	__uint64_t	xfs_ino_t;	/* inode number */
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_FILESYSTEMS
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_FILESYSTEMS
#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	/* !_FS_XFS_INUM_H */