File: [Development] / xfs-linux-nodel / xfs_rtalloc.h (download)
Revision 1.2, Thu Feb 10 00:42:35 1994 UTC (23 years, 8 months ago) by doucette
Branch: MAIN
Changes since 1.1: +2 -4
lines
Fix type of length values to xfs_extlen_t. Remove mp arguments where not
needed since tp is never null.
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#ifndef _FS_XFS_RTALLOC_H
#define _FS_XFS_RTALLOC_H
#ident "$Revision$"
/* Min and max rt extent sizes, specified in bytes */
#define XFS_MAX_RTEXTSIZE (16 * 1024 * 1024) /* 16MB */
#define XFS_MIN_RTEXTSIZE (64 * 1024) /* 64KB */
/*
* Constants for bit manipulations.
*/
#define XFS_NBBYLOG 3 /* log2(NBBY) */
#define XFS_WORDLOG 2 /* log2(sizeof(xfs_rtword_t)) */
#define XFS_NBWORDLOG (XFS_NBBYLOG + XFS_WORDLOG)
#define XFS_NBWORD (1 << XFS_NBWORDLOG)
#define XFS_WORDMASK ((1 << XFS_WORDLOG) - 1)
#define XFS_BLOCKSIZE(sbp) (1 << (sbp)->sb_blocklog)
#define XFS_BLOCKMASK(sbp) (XFS_BLOCKSIZE(sbp) - 1)
#define XFS_BLOCKWSIZE(sbp) (1 << ((sbp)->sb_blocklog - XFS_WORDLOG))
#define XFS_BLOCKWMASK(sbp) (XFS_BLOCKWSIZE(sbp) - 1)
/*
* Summary and bit manipulation macros.
*/
#define XFS_SUMOFFS(sbp,ls,bb) ((ls) * (sbp)->sb_rbmblocks + (bb))
#define XFS_SUMOFFSTOBLOCK(sbp,s) \
(((s) * sizeof(xfs_suminfo_t)) >> (sbp)->sb_blocklog)
#define XFS_SUMPTR(sbp,bp,so) \
((xfs_suminfo_t *)((char *)bp->b_un.b_addr + (((so) * sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(sbp))))
#define XFS_BITTOBLOCK(sbp,bi) ((bi) >> (sbp->sb_blocklog + XFS_NBBYLOG))
#define XFS_BLOCKTOBIT(sbp,bb) ((bb) << (sbp->sb_blocklog + XFS_NBBYLOG))
#define XFS_BITTOWORD(sbp,bi) (((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(sbp))
#define XFS_RTMIN(a,b) ((a) < (b) ? (a) : (b))
#define XFS_RTMAX(a,b) ((a) > (b) ? (a) : (b))
/*
* Function prototypes for exported functions.
*/
xfs_rtblock_t
xfs_rtallocate_extent(
xfs_trans_t *tp,
xfs_rtblock_t bno,
xfs_extlen_t minlen,
xfs_extlen_t maxlen,
xfs_extlen_t *len,
xfs_alloctype_t type,
int wasdel);
void
xfs_rtfree_extent(
xfs_trans_t *tp,
xfs_rtblock_t bno,
xfs_extlen_t len);
#ifdef SIM
int
xfs_rthibit(
xfs_rtword_t w);
#endif
void
xfs_rtprint_range(
xfs_mount_t *mp,
xfs_trans_t *tp,
xfs_rtbit_t start,
xfs_extlen_t len);
void
xfs_rtprint_summary(
xfs_mount_t *mp,
xfs_trans_t *tp);
#endif /* !_FS_XFS_RTALLOC_H */