xfs_sb.h

linux 内核源代码

#define	XFS_SB_GOOD_VERSION(sbp)	xfs_sb_good_version(sbp)
#ifdef __KERNEL__
static inline int xfs_sb_good_version(xfs_sb_t *sbp)
{
	return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
		  (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
		   ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		    !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
		      ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
		       (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
	  	    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
}
#else
static inline int xfs_sb_good_version(xfs_sb_t *sbp)
{
	return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
		  (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
		   ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		    !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
		      ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
		       (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
		  (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
		   (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
}
#endif /* __KERNEL__ */

#define	XFS_SB_VERSION_TONEW(v)	xfs_sb_version_tonew(v)
static inline unsigned xfs_sb_version_tonew(unsigned v)
{
	return ((((v) == XFS_SB_VERSION_1) ? \
		0 : \
		(((v) == XFS_SB_VERSION_2) ? \
			XFS_SB_VERSION_ATTRBIT : \
			(XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
		XFS_SB_VERSION_4);
}

#define	XFS_SB_VERSION_TOOLD(v)	xfs_sb_version_toold(v)
static inline unsigned xfs_sb_version_toold(unsigned v)
{
	return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
		0 : \
		(((v) & XFS_SB_VERSION_NLINKBIT) ? \
			XFS_SB_VERSION_3 : \
			(((v) & XFS_SB_VERSION_ATTRBIT) ?  \
				XFS_SB_VERSION_2 : \
				XFS_SB_VERSION_1)));
}

#define	XFS_SB_VERSION_HASATTR(sbp)	xfs_sb_version_hasattr(sbp)
static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
{
	return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
		 ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
		 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		  ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
}

#define	XFS_SB_VERSION_ADDATTR(sbp)	xfs_sb_version_addattr(sbp)
static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
{
	(sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
		XFS_SB_VERSION_2 : \
		((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
			((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
			(XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
}

#define	XFS_SB_VERSION_HASNLINK(sbp)	xfs_sb_version_hasnlink(sbp)
static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
{
	return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
		 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		  ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
}

#define	XFS_SB_VERSION_ADDNLINK(sbp)	xfs_sb_version_addnlink(sbp)
static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
{
	(sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
		XFS_SB_VERSION_3 : \
		((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
}

#define	XFS_SB_VERSION_HASQUOTA(sbp)	xfs_sb_version_hasquota(sbp)
static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
}

#define	XFS_SB_VERSION_ADDQUOTA(sbp)	xfs_sb_version_addquota(sbp)
static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
{
	(sbp)->sb_versionnum = \
		 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
			((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
			(XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
			 XFS_SB_VERSION_QUOTABIT));
}

#define	XFS_SB_VERSION_HASALIGN(sbp)	xfs_sb_version_hasalign(sbp)
static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
}

#define	XFS_SB_VERSION_SUBALIGN(sbp)	xfs_sb_version_subalign(sbp)
static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
{
	(sbp)->sb_versionnum = \
	 XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
}

#define XFS_SB_VERSION_HASDALIGN(sbp)	xfs_sb_version_hasdalign(sbp)
static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
}

#define XFS_SB_VERSION_ADDDALIGN(sbp)	xfs_sb_version_adddalign(sbp)
static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
{
	return (sbp)->sb_versionnum = \
		((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
}

#define XFS_SB_VERSION_HASSHARED(sbp)	xfs_sb_version_hasshared(sbp)
static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
}

#define XFS_SB_VERSION_ADDSHARED(sbp)	xfs_sb_version_addshared(sbp)
static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
{
	return (sbp)->sb_versionnum = \
		((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
}

#define XFS_SB_VERSION_SUBSHARED(sbp)	xfs_sb_version_subshared(sbp)
static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
{
	return (sbp)->sb_versionnum = \
		((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
}

#define XFS_SB_VERSION_HASDIRV2(sbp)	xfs_sb_version_hasdirv2(sbp)
static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
}

#define XFS_SB_VERSION_HASLOGV2(sbp)   xfs_sb_version_haslogv2(sbp)
static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
}

#define XFS_SB_VERSION_HASEXTFLGBIT(sbp)	xfs_sb_version_hasextflgbit(sbp)
static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
}

#define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)	xfs_sb_version_addextflgbit(sbp)
static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
{
	return (sbp)->sb_versionnum = \
		((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
}

#define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)	xfs_sb_version_subextflgbit(sbp)
static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
{
	return (sbp)->sb_versionnum = \
		((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
}

#define XFS_SB_VERSION_HASSECTOR(sbp)   xfs_sb_version_hassector(sbp)
static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
}

#define XFS_SB_VERSION_HASMOREBITS(sbp)	xfs_sb_version_hasmorebits(sbp)
static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
		((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
}

/*
 * sb_features2 bit version macros.
 *
 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 *
 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 *	((XFS_SB_VERSION_HASMOREBITS(sbp) &&
 *	 ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 */

static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_HASMOREBITS(sbp) &&	\
		((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
}

#define XFS_SB_VERSION_HASATTR2(sbp)	xfs_sb_version_hasattr2(sbp)
static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
{
	return (XFS_SB_VERSION_HASMOREBITS(sbp)) &&	\
		((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
}

#define XFS_SB_VERSION_ADDATTR2(sbp)	xfs_sb_version_addattr2(sbp)
static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
{
	((sbp)->sb_versionnum =	\
		((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),	\
	((sbp)->sb_features2 =	\
		((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
}

/*
 * end of superblock version macros
 */

#define XFS_SB_DADDR		((xfs_daddr_t)0) /* daddr in filesystem/ag */
#define	XFS_SB_BLOCK(mp)	XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
#define XFS_BUF_TO_SBP(bp)	((xfs_dsb_t *)XFS_BUF_PTR(bp))

#define	XFS_HDR_BLOCK(mp,d)	((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
#define	XFS_DADDR_TO_FSB(mp,d)	XFS_AGB_TO_FSB(mp, \
			XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
#define	XFS_FSB_TO_DADDR(mp,fsbno)	XFS_AGB_TO_DADDR(mp, \
			XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))

/*
 * File system sector to basic block conversions.
 */
#define XFS_FSS_TO_BB(mp,sec)	((sec) << (mp)->m_sectbb_log)

/*
 * File system block to basic block conversions.
 */
#define	XFS_FSB_TO_BB(mp,fsbno)	((fsbno) << (mp)->m_blkbb_log)
#define	XFS_BB_TO_FSB(mp,bb)	\
	(((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
#define	XFS_BB_TO_FSBT(mp,bb)	((bb) >> (mp)->m_blkbb_log)
#define	XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))

/*
 * File system block to byte conversions.
 */
#define XFS_FSB_TO_B(mp,fsbno)	((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
#define XFS_B_TO_FSB(mp,b)	\
	((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
#define XFS_B_TO_FSBT(mp,b)	(((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
#define XFS_B_FSB_OFFSET(mp,b)	((b) & (mp)->m_blockmask)

#endif	/* __XFS_SB_H__ */