[linux.git] / fs / xfs / xfs_sb.h

/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms 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.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_SB_H__
#define	__XFS_SB_H__

/*
 * Super block
 * Fits into a sector-sized buffer at address 0 of each allocation group.
 * Only the first of these is ever updated except during growfs.
 */

struct xfs_buf;
struct xfs_mount;

#define	XFS_SB_MAGIC		0x58465342	/* 'XFSB' */
#define	XFS_SB_VERSION_1	1		/* 5.3, 6.0.1, 6.1 */
#define	XFS_SB_VERSION_2	2		/* 6.2 - attributes */
#define	XFS_SB_VERSION_3	3		/* 6.2 - new inode version */
#define	XFS_SB_VERSION_4	4		/* 6.2+ - bitmask version */
#define	XFS_SB_VERSION_NUMBITS		0x000f
#define	XFS_SB_VERSION_ALLFBITS		0xfff0
#define	XFS_SB_VERSION_SASHFBITS	0xf000
#define	XFS_SB_VERSION_REALFBITS	0x0ff0
#define	XFS_SB_VERSION_ATTRBIT		0x0010
#define	XFS_SB_VERSION_NLINKBIT		0x0020
#define	XFS_SB_VERSION_QUOTABIT		0x0040
#define	XFS_SB_VERSION_ALIGNBIT		0x0080
#define	XFS_SB_VERSION_DALIGNBIT	0x0100
#define	XFS_SB_VERSION_SHAREDBIT	0x0200
#define XFS_SB_VERSION_LOGV2BIT		0x0400
#define XFS_SB_VERSION_SECTORBIT	0x0800
#define	XFS_SB_VERSION_EXTFLGBIT	0x1000
#define	XFS_SB_VERSION_DIRV2BIT		0x2000
#define	XFS_SB_VERSION_MOREBITSBIT	0x8000
#define	XFS_SB_VERSION_OKSASHFBITS	\
	(XFS_SB_VERSION_EXTFLGBIT | \
	 XFS_SB_VERSION_DIRV2BIT)
#define	XFS_SB_VERSION_OKREALFBITS	\
	(XFS_SB_VERSION_ATTRBIT | \
	 XFS_SB_VERSION_NLINKBIT | \
	 XFS_SB_VERSION_QUOTABIT | \
	 XFS_SB_VERSION_ALIGNBIT | \
	 XFS_SB_VERSION_DALIGNBIT | \
	 XFS_SB_VERSION_SHAREDBIT | \
	 XFS_SB_VERSION_LOGV2BIT | \
	 XFS_SB_VERSION_SECTORBIT | \
	 XFS_SB_VERSION_MOREBITSBIT)
#define	XFS_SB_VERSION_OKREALBITS	\
	(XFS_SB_VERSION_NUMBITS | \
	 XFS_SB_VERSION_OKREALFBITS | \
	 XFS_SB_VERSION_OKSASHFBITS)

/*
 * There are two words to hold XFS "feature" bits: the original
 * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
 *
 * These defines represent bits in sb_features2.
 */
#define XFS_SB_VERSION2_REALFBITS	0x00ffffff	/* Mask: features */
#define XFS_SB_VERSION2_RESERVED1BIT	0x00000001
#define XFS_SB_VERSION2_LAZYSBCOUNTBIT	0x00000002	/* Superblk counters */
#define XFS_SB_VERSION2_RESERVED4BIT	0x00000004
#define XFS_SB_VERSION2_ATTR2BIT	0x00000008	/* Inline attr rework */

#define	XFS_SB_VERSION2_OKREALFBITS	\
	(XFS_SB_VERSION2_LAZYSBCOUNTBIT	| \
	 XFS_SB_VERSION2_ATTR2BIT)
#define	XFS_SB_VERSION2_OKSASHFBITS	\
	(0)
#define XFS_SB_VERSION2_OKREALBITS	\
	(XFS_SB_VERSION2_OKREALFBITS |	\
	 XFS_SB_VERSION2_OKSASHFBITS )

typedef struct xfs_sb
{
	__uint32_t	sb_magicnum;	/* magic number == XFS_SB_MAGIC */
	__uint32_t	sb_blocksize;	/* logical block size, bytes */
	xfs_drfsbno_t	sb_dblocks;	/* number of data blocks */
	xfs_drfsbno_t	sb_rblocks;	/* number of realtime blocks */
	xfs_drtbno_t	sb_rextents;	/* number of realtime extents */
	uuid_t		sb_uuid;	/* file system unique id */
	xfs_dfsbno_t	sb_logstart;	/* starting block of log if internal */
	xfs_ino_t	sb_rootino;	/* root inode number */
	xfs_ino_t	sb_rbmino;	/* bitmap inode for realtime extents */
	xfs_ino_t	sb_rsumino;	/* summary inode for rt bitmap */
	xfs_agblock_t	sb_rextsize;	/* realtime extent size, blocks */
	xfs_agblock_t	sb_agblocks;	/* size of an allocation group */
	xfs_agnumber_t	sb_agcount;	/* number of allocation groups */
	xfs_extlen_t	sb_rbmblocks;	/* number of rt bitmap blocks */
	xfs_extlen_t	sb_logblocks;	/* number of log blocks */
	__uint16_t	sb_versionnum;	/* header version == XFS_SB_VERSION */
	__uint16_t	sb_sectsize;	/* volume sector size, bytes */
	__uint16_t	sb_inodesize;	/* inode size, bytes */
	__uint16_t	sb_inopblock;	/* inodes per block */
	char		sb_fname[12];	/* file system name */
	__uint8_t	sb_blocklog;	/* log2 of sb_blocksize */
	__uint8_t	sb_sectlog;	/* log2 of sb_sectsize */
	__uint8_t	sb_inodelog;	/* log2 of sb_inodesize */
	__uint8_t	sb_inopblog;	/* log2 of sb_inopblock */
	__uint8_t	sb_agblklog;	/* log2 of sb_agblocks (rounded up) */
	__uint8_t	sb_rextslog;	/* log2 of sb_rextents */
	__uint8_t	sb_inprogress;	/* mkfs is in progress, don't mount */
	__uint8_t	sb_imax_pct;	/* max % of fs for inode space */
					/* statistics */
	/*
	 * These fields must remain contiguous.  If you really
	 * want to change their layout, make sure you fix the
	 * code in xfs_trans_apply_sb_deltas().
	 */
	__uint64_t	sb_icount;	/* allocated inodes */
	__uint64_t	sb_ifree;	/* free inodes */
	__uint64_t	sb_fdblocks;	/* free data blocks */
	__uint64_t	sb_frextents;	/* free realtime extents */
	/*
	 * End contiguous fields.
	 */
	xfs_ino_t	sb_uquotino;	/* user quota inode */
	xfs_ino_t	sb_gquotino;	/* group quota inode */
	__uint16_t	sb_qflags;	/* quota flags */
	__uint8_t	sb_flags;	/* misc. flags */
	__uint8_t	sb_shared_vn;	/* shared version number */
	xfs_extlen_t	sb_inoalignmt;	/* inode chunk alignment, fsblocks */
	__uint32_t	sb_unit;	/* stripe or raid unit */
	__uint32_t	sb_width;	/* stripe or raid width */
	__uint8_t	sb_dirblklog;	/* log2 of dir block size (fsbs) */
	__uint8_t	sb_logsectlog;	/* log2 of the log sector size */
	__uint16_t	sb_logsectsize;	/* sector size for the log, bytes */
	__uint32_t	sb_logsunit;	/* stripe unit size for the log */
	__uint32_t	sb_features2;	/* additional feature bits */
} xfs_sb_t;

/*
 * Sequence number values for the fields.
 */
typedef enum {
	XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
	XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
	XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
	XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
	XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
	XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
	XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
	XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
	XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
	XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
	XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
	XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
	XFS_SBS_FEATURES2,
	XFS_SBS_FIELDCOUNT
} xfs_sb_field_t;

/*
 * Mask values, defined based on the xfs_sb_field_t values.
 * Only define the ones we're using.
 */
#define	XFS_SB_MVAL(x)		(1LL << XFS_SBS_ ## x)
#define	XFS_SB_UUID		XFS_SB_MVAL(UUID)
#define	XFS_SB_FNAME		XFS_SB_MVAL(FNAME)
#define	XFS_SB_ROOTINO		XFS_SB_MVAL(ROOTINO)
#define	XFS_SB_RBMINO		XFS_SB_MVAL(RBMINO)
#define	XFS_SB_RSUMINO		XFS_SB_MVAL(RSUMINO)
#define	XFS_SB_VERSIONNUM	XFS_SB_MVAL(VERSIONNUM)
#define XFS_SB_UQUOTINO		XFS_SB_MVAL(UQUOTINO)
#define XFS_SB_GQUOTINO		XFS_SB_MVAL(GQUOTINO)
#define XFS_SB_QFLAGS		XFS_SB_MVAL(QFLAGS)
#define XFS_SB_SHARED_VN	XFS_SB_MVAL(SHARED_VN)
#define XFS_SB_UNIT		XFS_SB_MVAL(UNIT)
#define XFS_SB_WIDTH		XFS_SB_MVAL(WIDTH)
#define XFS_SB_ICOUNT		XFS_SB_MVAL(ICOUNT)
#define XFS_SB_IFREE		XFS_SB_MVAL(IFREE)
#define XFS_SB_FDBLOCKS		XFS_SB_MVAL(FDBLOCKS)
#define XFS_SB_FEATURES2	XFS_SB_MVAL(FEATURES2)
#define	XFS_SB_NUM_BITS		((int)XFS_SBS_FIELDCOUNT)
#define	XFS_SB_ALL_BITS		((1LL << XFS_SB_NUM_BITS) - 1)
#define	XFS_SB_MOD_BITS		\
	(XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
	 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
	 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
	 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2)


/*
 * Misc. Flags - warning - these will be cleared by xfs_repair unless
 * a feature bit is set when the flag is used.
 */
#define XFS_SBF_NOFLAGS		0x00	/* no flags set */
#define XFS_SBF_READONLY	0x01	/* only read-only mounts allowed */

/*
 * define max. shared version we can interoperate with
 */
#define XFS_SB_MAX_SHARED_VN	0

#define	XFS_SB_VERSION_NUM(sbp)	((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)

#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_sb_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__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 LT	17	*/
	18	#ifndef __XFS_SB_H__
	19	#define __XFS_SB_H__
	20
	21	/*
	22	* Super block
	23	* Fits into a sector-sized buffer at address 0 of each allocation group.
	24	* Only the first of these is ever updated except during growfs.
	25	*/
	26
	27	struct xfs_buf;
	28	struct xfs_mount;
	29
	30	#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */
	31	#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
	32	#define XFS_SB_VERSION_2 2 /* 6.2 - attributes */
	33	#define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */
	34	#define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */
	35	#define XFS_SB_VERSION_NUMBITS 0x000f
	36	#define XFS_SB_VERSION_ALLFBITS 0xfff0
	37	#define XFS_SB_VERSION_SASHFBITS 0xf000
	38	#define XFS_SB_VERSION_REALFBITS 0x0ff0
	39	#define XFS_SB_VERSION_ATTRBIT 0x0010
	40	#define XFS_SB_VERSION_NLINKBIT 0x0020
	41	#define XFS_SB_VERSION_QUOTABIT 0x0040
	42	#define XFS_SB_VERSION_ALIGNBIT 0x0080
	43	#define XFS_SB_VERSION_DALIGNBIT 0x0100
	44	#define XFS_SB_VERSION_SHAREDBIT 0x0200
	45	#define XFS_SB_VERSION_LOGV2BIT 0x0400
	46	#define XFS_SB_VERSION_SECTORBIT 0x0800
	47	#define XFS_SB_VERSION_EXTFLGBIT 0x1000
	48	#define XFS_SB_VERSION_DIRV2BIT 0x2000
	49	#define XFS_SB_VERSION_MOREBITSBIT 0x8000
	50	#define XFS_SB_VERSION_OKSASHFBITS \
	51	(XFS_SB_VERSION_EXTFLGBIT \| \
	52	XFS_SB_VERSION_DIRV2BIT)
	53	#define XFS_SB_VERSION_OKREALFBITS \
	54	(XFS_SB_VERSION_ATTRBIT \| \
	55	XFS_SB_VERSION_NLINKBIT \| \
	56	XFS_SB_VERSION_QUOTABIT \| \
	57	XFS_SB_VERSION_ALIGNBIT \| \
	58	XFS_SB_VERSION_DALIGNBIT \| \
	59	XFS_SB_VERSION_SHAREDBIT \| \
	60	XFS_SB_VERSION_LOGV2BIT \| \
d8cc890d NS	61	XFS_SB_VERSION_SECTORBIT \| \
d8cc890d NS	62	XFS_SB_VERSION_MOREBITSBIT)
1da177e4 LT	63	#define XFS_SB_VERSION_OKREALBITS \
	64	(XFS_SB_VERSION_NUMBITS \| \
	65	XFS_SB_VERSION_OKREALFBITS \| \
	66	XFS_SB_VERSION_OKSASHFBITS)
1da177e4 LT	67
	68	/*
	69	* There are two words to hold XFS "feature" bits: the original
	70	* word, sb_versionnum, and sb_features2. Whenever a bit is set in
	71	* sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
	72	*
	73	* These defines represent bits in sb_features2.
	74	*/
	75	#define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
	76	#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
92821e2b	77	#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
d8cc890d NS	78	#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
d8cc890d NS	79	#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
1da177e4 LT	80
1da177e4 LT	81	#define XFS_SB_VERSION2_OKREALFBITS \
92821e2b DC	82	(XFS_SB_VERSION2_LAZYSBCOUNTBIT \| \
92821e2b DC	83	XFS_SB_VERSION2_ATTR2BIT)
1da177e4 LT	84	#define XFS_SB_VERSION2_OKSASHFBITS \
	85	(0)
	86	#define XFS_SB_VERSION2_OKREALBITS \
	87	(XFS_SB_VERSION2_OKREALFBITS \| \
	88	XFS_SB_VERSION2_OKSASHFBITS )
	89
1da177e4 LT	90	typedef struct xfs_sb
	91	{
	92	__uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
	93	__uint32_t sb_blocksize; /* logical block size, bytes */
	94	xfs_drfsbno_t sb_dblocks; /* number of data blocks */
	95	xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
	96	xfs_drtbno_t sb_rextents; /* number of realtime extents */
	97	uuid_t sb_uuid; /* file system unique id */
	98	xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
	99	xfs_ino_t sb_rootino; /* root inode number */
	100	xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
	101	xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
	102	xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
	103	xfs_agblock_t sb_agblocks; /* size of an allocation group */
	104	xfs_agnumber_t sb_agcount; /* number of allocation groups */
	105	xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
	106	xfs_extlen_t sb_logblocks; /* number of log blocks */
	107	__uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
	108	__uint16_t sb_sectsize; /* volume sector size, bytes */
	109	__uint16_t sb_inodesize; /* inode size, bytes */
	110	__uint16_t sb_inopblock; /* inodes per block */
	111	char sb_fname[12]; /* file system name */
	112	__uint8_t sb_blocklog; /* log2 of sb_blocksize */
	113	__uint8_t sb_sectlog; /* log2 of sb_sectsize */
	114	__uint8_t sb_inodelog; /* log2 of sb_inodesize */
	115	__uint8_t sb_inopblog; /* log2 of sb_inopblock */
	116	__uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
	117	__uint8_t sb_rextslog; /* log2 of sb_rextents */
	118	__uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
	119	__uint8_t sb_imax_pct; /* max % of fs for inode space */
	120	/* statistics */
	121	/*
	122	* These fields must remain contiguous. If you really
	123	* want to change their layout, make sure you fix the
	124	* code in xfs_trans_apply_sb_deltas().
	125	*/
	126	__uint64_t sb_icount; /* allocated inodes */
	127	__uint64_t sb_ifree; /* free inodes */
	128	__uint64_t sb_fdblocks; /* free data blocks */
	129	__uint64_t sb_frextents; /* free realtime extents */
	130	/*
	131	* End contiguous fields.
	132	*/
	133	xfs_ino_t sb_uquotino; /* user quota inode */
	134	xfs_ino_t sb_gquotino; /* group quota inode */
	135	__uint16_t sb_qflags; /* quota flags */
	136	__uint8_t sb_flags; /* misc. flags */
	137	__uint8_t sb_shared_vn; /* shared version number */
	138	xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
	139	__uint32_t sb_unit; /* stripe or raid unit */
	140	__uint32_t sb_width; /* stripe or raid width */
	141	__uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
	142	__uint8_t sb_logsectlog; /* log2 of the log sector size */
	143	__uint16_t sb_logsectsize; /* sector size for the log, bytes */
	144	__uint32_t sb_logsunit; /* stripe unit size for the log */
d8cc890d	145	__uint32_t sb_features2; /* additional feature bits */
1da177e4 LT	146	} xfs_sb_t;
	147
	148	/*
	149	* Sequence number values for the fields.
	150	*/
	151	typedef enum {
	152	XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
	153	XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
	154	XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
	155	XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
	156	XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
	157	XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
	158	XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
	159	XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
	160	XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
	161	XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
	162	XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
	163	XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
	164	XFS_SBS_FEATURES2,
	165	XFS_SBS_FIELDCOUNT
	166	} xfs_sb_field_t;
	167
	168	/*
	169	* Mask values, defined based on the xfs_sb_field_t values.
	170	* Only define the ones we're using.
	171	*/
	172	#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
	173	#define XFS_SB_UUID XFS_SB_MVAL(UUID)
	174	#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
	175	#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
	176	#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
	177	#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
	178	#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
	179	#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
	180	#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
	181	#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
	182	#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
	183	#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
	184	#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
92821e2b DC	185	#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
	186	#define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
	187	#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
d8cc890d	188	#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
1da177e4 LT	189	#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
	190	#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
	191	#define XFS_SB_MOD_BITS \
	192	(XFS_SB_UUID \| XFS_SB_ROOTINO \| XFS_SB_RBMINO \| XFS_SB_RSUMINO \| \
	193	XFS_SB_VERSIONNUM \| XFS_SB_UQUOTINO \| XFS_SB_GQUOTINO \| \
d8cc890d	194	XFS_SB_QFLAGS \| XFS_SB_SHARED_VN \| XFS_SB_UNIT \| XFS_SB_WIDTH \| \
92821e2b	195	XFS_SB_ICOUNT \| XFS_SB_IFREE \| XFS_SB_FDBLOCKS \| XFS_SB_FEATURES2)
d8cc890d	196
1da177e4 LT	197
	198	/*
	199	* Misc. Flags - warning - these will be cleared by xfs_repair unless
	200	* a feature bit is set when the flag is used.
	201	*/
	202	#define XFS_SBF_NOFLAGS 0x00 /* no flags set */
	203	#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
	204
	205	/*
	206	* define max. shared version we can interoperate with
	207	*/
	208	#define XFS_SB_MAX_SHARED_VN 0
	209
1da177e4	210	#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
1da177e4	211
1da177e4	212	#define XFS_SB_GOOD_VERSION(sbp) xfs_sb_good_version(sbp)
1da177e4	213	#ifdef __KERNEL__
a844f451 NS	214	static inline int xfs_sb_good_version(xfs_sb_t *sbp)
	215	{
	216	return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
	217	(sbp->sb_versionnum <= XFS_SB_VERSION_3)) \|\| \
	218	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	219	!((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) \|\| \
	220	((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
	221	(sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
	222	(sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
	223	}
	224	#else
	225	static inline int xfs_sb_good_version(xfs_sb_t *sbp)
	226	{
	227	return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
	228	(sbp->sb_versionnum <= XFS_SB_VERSION_3)) \|\| \
	229	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	230	!((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) \|\| \
	231	((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
	232	(sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
	233	(!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) \|\| \
	234	(sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
	235	}
1da177e4	236	#endif /* __KERNEL__ */
1da177e4	237
1da177e4	238	#define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
a844f451 NS	239	static inline unsigned xfs_sb_version_tonew(unsigned v)
	240	{
	241	return ((((v) == XFS_SB_VERSION_1) ? \
1da177e4 LT	242	0 : \
	243	(((v) == XFS_SB_VERSION_2) ? \
	244	XFS_SB_VERSION_ATTRBIT : \
	245	(XFS_SB_VERSION_ATTRBIT \| XFS_SB_VERSION_NLINKBIT))) \| \
a844f451 NS	246	XFS_SB_VERSION_4);
a844f451 NS	247	}
1da177e4	248
1da177e4	249	#define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
a844f451 NS	250	static inline unsigned xfs_sb_version_toold(unsigned v)
	251	{
	252	return (((v) & (XFS_SB_VERSION_QUOTABIT \| XFS_SB_VERSION_ALIGNBIT)) ? \
1da177e4 LT	253	0 : \
	254	(((v) & XFS_SB_VERSION_NLINKBIT) ? \
	255	XFS_SB_VERSION_3 : \
	256	(((v) & XFS_SB_VERSION_ATTRBIT) ? \
	257	XFS_SB_VERSION_2 : \
a844f451 NS	258	XFS_SB_VERSION_1)));
a844f451 NS	259	}
1da177e4	260
1da177e4	261	#define XFS_SB_VERSION_HASATTR(sbp) xfs_sb_version_hasattr(sbp)
a844f451 NS	262	static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
	263	{
	264	return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) \|\| \
	265	((sbp)->sb_versionnum == XFS_SB_VERSION_3) \|\| \
	266	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	267	((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
	268	}
1da177e4	269
1da177e4	270	#define XFS_SB_VERSION_ADDATTR(sbp) xfs_sb_version_addattr(sbp)
a844f451 NS	271	static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
	272	{
	273	(sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
1da177e4 LT	274	XFS_SB_VERSION_2 : \
	275	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
	276	((sbp)->sb_versionnum \| XFS_SB_VERSION_ATTRBIT) : \
a844f451 NS	277	(XFS_SB_VERSION_4 \| XFS_SB_VERSION_ATTRBIT)));
a844f451 NS	278	}
1da177e4	279
1da177e4	280	#define XFS_SB_VERSION_HASNLINK(sbp) xfs_sb_version_hasnlink(sbp)
a844f451 NS	281	static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
	282	{
	283	return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) \|\| \
	284	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	285	((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
	286	}
1da177e4	287
1da177e4	288	#define XFS_SB_VERSION_ADDNLINK(sbp) xfs_sb_version_addnlink(sbp)
a844f451 NS	289	static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
	290	{
	291	(sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
1da177e4	292	XFS_SB_VERSION_3 : \
a844f451 NS	293	((sbp)->sb_versionnum \| XFS_SB_VERSION_NLINKBIT));
a844f451 NS	294	}
1da177e4	295
1da177e4	296	#define XFS_SB_VERSION_HASQUOTA(sbp) xfs_sb_version_hasquota(sbp)
a844f451 NS	297	static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
	298	{
	299	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	300	((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
	301	}
1da177e4	302
1da177e4	303	#define XFS_SB_VERSION_ADDQUOTA(sbp) xfs_sb_version_addquota(sbp)
a844f451 NS	304	static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
	305	{
	306	(sbp)->sb_versionnum = \
	307	(XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
	308	((sbp)->sb_versionnum \| XFS_SB_VERSION_QUOTABIT) : \
	309	(XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) \| \
	310	XFS_SB_VERSION_QUOTABIT));
	311	}
	312
1da177e4	313	#define XFS_SB_VERSION_HASALIGN(sbp) xfs_sb_version_hasalign(sbp)
a844f451 NS	314	static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
	315	{
	316	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	317	((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
	318	}
1da177e4	319
1da177e4	320	#define XFS_SB_VERSION_SUBALIGN(sbp) xfs_sb_version_subalign(sbp)
a844f451 NS	321	static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
	322	{
	323	(sbp)->sb_versionnum = \
	324	XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
	325	}
1da177e4	326
1da177e4	327	#define XFS_SB_VERSION_HASDALIGN(sbp) xfs_sb_version_hasdalign(sbp)
a844f451 NS	328	static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
	329	{
	330	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	331	((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
	332	}
1da177e4	333
1da177e4	334	#define XFS_SB_VERSION_ADDDALIGN(sbp) xfs_sb_version_adddalign(sbp)
a844f451 NS	335	static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
	336	{
	337	return (sbp)->sb_versionnum = \
	338	((sbp)->sb_versionnum \| XFS_SB_VERSION_DALIGNBIT);
	339	}
1da177e4	340
1da177e4	341	#define XFS_SB_VERSION_HASSHARED(sbp) xfs_sb_version_hasshared(sbp)
a844f451 NS	342	static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
	343	{
	344	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	345	((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
	346	}
1da177e4	347
1da177e4	348	#define XFS_SB_VERSION_ADDSHARED(sbp) xfs_sb_version_addshared(sbp)
a844f451 NS	349	static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
	350	{
	351	return (sbp)->sb_versionnum = \
	352	((sbp)->sb_versionnum \| XFS_SB_VERSION_SHAREDBIT);
	353	}
1da177e4	354
1da177e4	355	#define XFS_SB_VERSION_SUBSHARED(sbp) xfs_sb_version_subshared(sbp)
a844f451 NS	356	static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
	357	{
	358	return (sbp)->sb_versionnum = \
	359	((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
	360	}
1da177e4	361
1da177e4	362	#define XFS_SB_VERSION_HASDIRV2(sbp) xfs_sb_version_hasdirv2(sbp)
a844f451 NS	363	static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
	364	{
	365	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	366	((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
	367	}
1da177e4	368
1da177e4	369	#define XFS_SB_VERSION_HASLOGV2(sbp) xfs_sb_version_haslogv2(sbp)
a844f451 NS	370	static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
	371	{
	372	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	373	((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
	374	}
1da177e4	375
1da177e4	376	#define XFS_SB_VERSION_HASEXTFLGBIT(sbp) xfs_sb_version_hasextflgbit(sbp)
a844f451 NS	377	static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
	378	{
	379	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	380	((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
	381	}
1da177e4	382
1da177e4	383	#define XFS_SB_VERSION_ADDEXTFLGBIT(sbp) xfs_sb_version_addextflgbit(sbp)
a844f451 NS	384	static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
	385	{
	386	return (sbp)->sb_versionnum = \
	387	((sbp)->sb_versionnum \| XFS_SB_VERSION_EXTFLGBIT);
	388	}
1da177e4	389
1da177e4	390	#define XFS_SB_VERSION_SUBEXTFLGBIT(sbp) xfs_sb_version_subextflgbit(sbp)
a844f451 NS	391	static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
	392	{
	393	return (sbp)->sb_versionnum = \
	394	((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
	395	}
1da177e4	396
1da177e4	397	#define XFS_SB_VERSION_HASSECTOR(sbp) xfs_sb_version_hassector(sbp)
a844f451 NS	398	static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
	399	{
	400	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	401	((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
	402	}
1da177e4	403
1da177e4	404	#define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
a844f451 NS	405	static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
	406	{
	407	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	408	((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
	409	}
1da177e4 LT	410
	411	/*
	412	* sb_features2 bit version macros.
	413	*
d8cc890d	414	* For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
1da177e4	415	*
d8cc890d	416	* SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
1da177e4	417	* ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
d8cc890d	418	* ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
1da177e4	419	*/
a844f451	420
92821e2b DC	421	static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
	422	{
	423	return (XFS_SB_VERSION_HASMOREBITS(sbp) && \
	424	((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
	425	}
	426
d8cc890d	427	#define XFS_SB_VERSION_HASATTR2(sbp) xfs_sb_version_hasattr2(sbp)
a844f451 NS	428	static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
	429	{
	430	return (XFS_SB_VERSION_HASMOREBITS(sbp)) && \
	431	((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
	432	}
1da177e4	433
d8cc890d	434	#define XFS_SB_VERSION_ADDATTR2(sbp) xfs_sb_version_addattr2(sbp)
a844f451 NS	435	static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
a844f451 NS	436	{
d8cc890d NS	437	((sbp)->sb_versionnum = \
	438	((sbp)->sb_versionnum \| XFS_SB_VERSION_MOREBITSBIT), \
	439	((sbp)->sb_features2 = \
a844f451 NS	440	((sbp)->sb_features2 \| XFS_SB_VERSION2_ATTR2BIT)));
	441	}
	442
1da177e4 LT	443	/*
	444	* end of superblock version macros
	445	*/
	446
a844f451	447	#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
1da177e4	448	#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
1da177e4	449	#define XFS_BUF_TO_SBP(bp) ((xfs_sb_t *)XFS_BUF_PTR(bp))
a844f451 NS	450
	451	#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
	452	#define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
	453	XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
	454	#define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
	455	XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
1da177e4 LT	456
	457	/*
	458	* File system sector to basic block conversions.
	459	*/
	460	#define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
1da177e4 LT	461
	462	/*
	463	* File system block to basic block conversions.
	464	*/
	465	#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
	466	#define XFS_BB_TO_FSB(mp,bb) \
	467	(((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
	468	#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
	469	#define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
	470
	471	/*
	472	* File system block to byte conversions.
	473	*/
	474	#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
	475	#define XFS_B_TO_FSB(mp,b) \
	476	((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
	477	#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
	478	#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
	479
	480	#endif /* __XFS_SB_H__ */