[net-next-2.6.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 )

/*
 * Superblock - in core version.  Must match the ondisk version below.
 */
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;

/*
 * Superblock - on disk version.  Must match the in core version below.
 */
typedef struct xfs_dsb {
	__be32		sb_magicnum;	/* magic number == XFS_SB_MAGIC */
	__be32		sb_blocksize;	/* logical block size, bytes */
	__be64		sb_dblocks;	/* number of data blocks */
	__be64		sb_rblocks;	/* number of realtime blocks */
	__be64		sb_rextents;	/* number of realtime extents */
	uuid_t		sb_uuid;	/* file system unique id */
	__be64		sb_logstart;	/* starting block of log if internal */
	__be64		sb_rootino;	/* root inode number */
	__be64		sb_rbmino;	/* bitmap inode for realtime extents */
	__be64		sb_rsumino;	/* summary inode for rt bitmap */
	__be32		sb_rextsize;	/* realtime extent size, blocks */
	__be32		sb_agblocks;	/* size of an allocation group */
	__be32		sb_agcount;	/* number of allocation groups */
	__be32		sb_rbmblocks;	/* number of rt bitmap blocks */
	__be32		sb_logblocks;	/* number of log blocks */
	__be16		sb_versionnum;	/* header version == XFS_SB_VERSION */
	__be16		sb_sectsize;	/* volume sector size, bytes */
	__be16		sb_inodesize;	/* inode size, bytes */
	__be16		sb_inopblock;	/* inodes per block */
	char		sb_fname[12];	/* file system name */
	__u8		sb_blocklog;	/* log2 of sb_blocksize */
	__u8		sb_sectlog;	/* log2 of sb_sectsize */
	__u8		sb_inodelog;	/* log2 of sb_inodesize */
	__u8		sb_inopblog;	/* log2 of sb_inopblock */
	__u8		sb_agblklog;	/* log2 of sb_agblocks (rounded up) */
	__u8		sb_rextslog;	/* log2 of sb_rextents */
	__u8		sb_inprogress;	/* mkfs is in progress, don't mount */
	__u8		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().
	 */
	__be64		sb_icount;	/* allocated inodes */
	__be64		sb_ifree;	/* free inodes */
	__be64		sb_fdblocks;	/* free data blocks */
	__be64		sb_frextents;	/* free realtime extents */
	/*
	 * End contiguous fields.
	 */
	__be64		sb_uquotino;	/* user quota inode */
	__be64		sb_gquotino;	/* group quota inode */
	__be16		sb_qflags;	/* quota flags */
	__u8		sb_flags;	/* misc. flags */
	__u8		sb_shared_vn;	/* shared version number */
	__be32		sb_inoalignmt;	/* inode chunk alignment, fsblocks */
	__be32		sb_unit;	/* stripe or raid unit */
	__be32		sb_width;	/* stripe or raid width */
	__u8		sb_dirblklog;	/* log2 of dir block size (fsbs) */
	__u8		sb_logsectlog;	/* log2 of the log sector size */
	__be16		sb_logsectsize;	/* sector size for the log, bytes */
	__be32		sb_logsunit;	/* stripe unit size for the log */
	__be32		sb_features2;	/* additional feature bits */
} xfs_dsb_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)

#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__ */

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);
}

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)));
}

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));
}

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)));
}

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));
}

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));
}

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);
}

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));
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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));
}

static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
{
	return (xfs_sb_version_hasmorebits(sbp)) &&	\
		((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
}

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__ */
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
2bdf7cd0 CH	90	/*
	91	* Superblock - in core version. Must match the ondisk version below.
	92	*/
	93	typedef struct xfs_sb {
1da177e4 LT	94	__uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
	95	__uint32_t sb_blocksize; /* logical block size, bytes */
	96	xfs_drfsbno_t sb_dblocks; /* number of data blocks */
	97	xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
	98	xfs_drtbno_t sb_rextents; /* number of realtime extents */
	99	uuid_t sb_uuid; /* file system unique id */
	100	xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
	101	xfs_ino_t sb_rootino; /* root inode number */
	102	xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
	103	xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
	104	xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
	105	xfs_agblock_t sb_agblocks; /* size of an allocation group */
	106	xfs_agnumber_t sb_agcount; /* number of allocation groups */
	107	xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
	108	xfs_extlen_t sb_logblocks; /* number of log blocks */
	109	__uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
	110	__uint16_t sb_sectsize; /* volume sector size, bytes */
	111	__uint16_t sb_inodesize; /* inode size, bytes */
	112	__uint16_t sb_inopblock; /* inodes per block */
	113	char sb_fname[12]; /* file system name */
	114	__uint8_t sb_blocklog; /* log2 of sb_blocksize */
	115	__uint8_t sb_sectlog; /* log2 of sb_sectsize */
	116	__uint8_t sb_inodelog; /* log2 of sb_inodesize */
	117	__uint8_t sb_inopblog; /* log2 of sb_inopblock */
	118	__uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
	119	__uint8_t sb_rextslog; /* log2 of sb_rextents */
	120	__uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
	121	__uint8_t sb_imax_pct; /* max % of fs for inode space */
	122	/* statistics */
	123	/*
	124	* These fields must remain contiguous. If you really
	125	* want to change their layout, make sure you fix the
	126	* code in xfs_trans_apply_sb_deltas().
	127	*/
	128	__uint64_t sb_icount; /* allocated inodes */
	129	__uint64_t sb_ifree; /* free inodes */
	130	__uint64_t sb_fdblocks; /* free data blocks */
	131	__uint64_t sb_frextents; /* free realtime extents */
	132	/*
	133	* End contiguous fields.
	134	*/
	135	xfs_ino_t sb_uquotino; /* user quota inode */
	136	xfs_ino_t sb_gquotino; /* group quota inode */
	137	__uint16_t sb_qflags; /* quota flags */
	138	__uint8_t sb_flags; /* misc. flags */
	139	__uint8_t sb_shared_vn; /* shared version number */
	140	xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
	141	__uint32_t sb_unit; /* stripe or raid unit */
	142	__uint32_t sb_width; /* stripe or raid width */
	143	__uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
	144	__uint8_t sb_logsectlog; /* log2 of the log sector size */
	145	__uint16_t sb_logsectsize; /* sector size for the log, bytes */
	146	__uint32_t sb_logsunit; /* stripe unit size for the log */
d8cc890d	147	__uint32_t sb_features2; /* additional feature bits */
1da177e4 LT	148	} xfs_sb_t;
1da177e4 LT	149
2bdf7cd0 CH	150	/*
	151	* Superblock - on disk version. Must match the in core version below.
	152	*/
	153	typedef struct xfs_dsb {
	154	__be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */
	155	__be32 sb_blocksize; /* logical block size, bytes */
	156	__be64 sb_dblocks; /* number of data blocks */
	157	__be64 sb_rblocks; /* number of realtime blocks */
	158	__be64 sb_rextents; /* number of realtime extents */
	159	uuid_t sb_uuid; /* file system unique id */
	160	__be64 sb_logstart; /* starting block of log if internal */
	161	__be64 sb_rootino; /* root inode number */
	162	__be64 sb_rbmino; /* bitmap inode for realtime extents */
	163	__be64 sb_rsumino; /* summary inode for rt bitmap */
	164	__be32 sb_rextsize; /* realtime extent size, blocks */
	165	__be32 sb_agblocks; /* size of an allocation group */
	166	__be32 sb_agcount; /* number of allocation groups */
	167	__be32 sb_rbmblocks; /* number of rt bitmap blocks */
	168	__be32 sb_logblocks; /* number of log blocks */
	169	__be16 sb_versionnum; /* header version == XFS_SB_VERSION */
	170	__be16 sb_sectsize; /* volume sector size, bytes */
	171	__be16 sb_inodesize; /* inode size, bytes */
	172	__be16 sb_inopblock; /* inodes per block */
	173	char sb_fname[12]; /* file system name */
	174	__u8 sb_blocklog; /* log2 of sb_blocksize */
	175	__u8 sb_sectlog; /* log2 of sb_sectsize */
	176	__u8 sb_inodelog; /* log2 of sb_inodesize */
	177	__u8 sb_inopblog; /* log2 of sb_inopblock */
	178	__u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */
	179	__u8 sb_rextslog; /* log2 of sb_rextents */
	180	__u8 sb_inprogress; /* mkfs is in progress, don't mount */
	181	__u8 sb_imax_pct; /* max % of fs for inode space */
	182	/* statistics */
	183	/*
	184	* These fields must remain contiguous. If you really
	185	* want to change their layout, make sure you fix the
	186	* code in xfs_trans_apply_sb_deltas().
	187	*/
	188	__be64 sb_icount; /* allocated inodes */
	189	__be64 sb_ifree; /* free inodes */
	190	__be64 sb_fdblocks; /* free data blocks */
	191	__be64 sb_frextents; /* free realtime extents */
	192	/*
	193	* End contiguous fields.
	194	*/
	195	__be64 sb_uquotino; /* user quota inode */
	196	__be64 sb_gquotino; /* group quota inode */
	197	__be16 sb_qflags; /* quota flags */
	198	__u8 sb_flags; /* misc. flags */
	199	__u8 sb_shared_vn; /* shared version number */
	200	__be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */
	201	__be32 sb_unit; /* stripe or raid unit */
	202	__be32 sb_width; /* stripe or raid width */
	203	__u8 sb_dirblklog; /* log2 of dir block size (fsbs) */
	204	__u8 sb_logsectlog; /* log2 of the log sector size */
	205	__be16 sb_logsectsize; /* sector size for the log, bytes */
	206	__be32 sb_logsunit; /* stripe unit size for the log */
	207	__be32 sb_features2; /* additional feature bits */
	208	} xfs_dsb_t;
	209
1da177e4 LT	210	/*
	211	* Sequence number values for the fields.
	212	*/
	213	typedef enum {
	214	XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
	215	XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
	216	XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
	217	XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
	218	XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
	219	XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
	220	XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
	221	XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
	222	XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
	223	XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
	224	XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
	225	XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
	226	XFS_SBS_FEATURES2,
	227	XFS_SBS_FIELDCOUNT
	228	} xfs_sb_field_t;
	229
	230	/*
	231	* Mask values, defined based on the xfs_sb_field_t values.
	232	* Only define the ones we're using.
	233	*/
	234	#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
	235	#define XFS_SB_UUID XFS_SB_MVAL(UUID)
	236	#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
	237	#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
	238	#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
	239	#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
	240	#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
	241	#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
	242	#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
	243	#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
	244	#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
	245	#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
	246	#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
92821e2b DC	247	#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
	248	#define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
	249	#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
d8cc890d	250	#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
1da177e4 LT	251	#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
	252	#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
	253	#define XFS_SB_MOD_BITS \
	254	(XFS_SB_UUID \| XFS_SB_ROOTINO \| XFS_SB_RBMINO \| XFS_SB_RSUMINO \| \
	255	XFS_SB_VERSIONNUM \| XFS_SB_UQUOTINO \| XFS_SB_GQUOTINO \| \
d8cc890d	256	XFS_SB_QFLAGS \| XFS_SB_SHARED_VN \| XFS_SB_UNIT \| XFS_SB_WIDTH \| \
92821e2b	257	XFS_SB_ICOUNT \| XFS_SB_IFREE \| XFS_SB_FDBLOCKS \| XFS_SB_FEATURES2)
d8cc890d	258
1da177e4 LT	259
	260	/*
	261	* Misc. Flags - warning - these will be cleared by xfs_repair unless
	262	* a feature bit is set when the flag is used.
	263	*/
	264	#define XFS_SBF_NOFLAGS 0x00 /* no flags set */
	265	#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
	266
	267	/*
	268	* define max. shared version we can interoperate with
	269	*/
	270	#define XFS_SB_MAX_SHARED_VN 0
	271
1da177e4	272	#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
1da177e4	273
1da177e4	274	#ifdef __KERNEL__
a844f451 NS	275	static inline int xfs_sb_good_version(xfs_sb_t *sbp)
	276	{
	277	return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
	278	(sbp->sb_versionnum <= XFS_SB_VERSION_3)) \|\| \
	279	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	280	!((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) \|\| \
	281	((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
	282	(sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
	283	(sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
	284	}
	285	#else
	286	static inline int xfs_sb_good_version(xfs_sb_t *sbp)
	287	{
	288	return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
	289	(sbp->sb_versionnum <= XFS_SB_VERSION_3)) \|\| \
	290	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	291	!((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) \|\| \
	292	((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
	293	(sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
	294	(!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) \|\| \
	295	(sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
	296	}
1da177e4	297	#endif /* __KERNEL__ */
1da177e4	298
a844f451 NS	299	static inline unsigned xfs_sb_version_tonew(unsigned v)
	300	{
	301	return ((((v) == XFS_SB_VERSION_1) ? \
1da177e4 LT	302	0 : \
	303	(((v) == XFS_SB_VERSION_2) ? \
	304	XFS_SB_VERSION_ATTRBIT : \
	305	(XFS_SB_VERSION_ATTRBIT \| XFS_SB_VERSION_NLINKBIT))) \| \
a844f451 NS	306	XFS_SB_VERSION_4);
a844f451 NS	307	}
1da177e4	308
a844f451 NS	309	static inline unsigned xfs_sb_version_toold(unsigned v)
	310	{
	311	return (((v) & (XFS_SB_VERSION_QUOTABIT \| XFS_SB_VERSION_ALIGNBIT)) ? \
1da177e4 LT	312	0 : \
	313	(((v) & XFS_SB_VERSION_NLINKBIT) ? \
	314	XFS_SB_VERSION_3 : \
	315	(((v) & XFS_SB_VERSION_ATTRBIT) ? \
	316	XFS_SB_VERSION_2 : \
a844f451 NS	317	XFS_SB_VERSION_1)));
a844f451 NS	318	}
1da177e4	319
a844f451 NS	320	static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
	321	{
	322	return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) \|\| \
	323	((sbp)->sb_versionnum == XFS_SB_VERSION_3) \|\| \
	324	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	325	((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
	326	}
1da177e4	327
a844f451 NS	328	static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
	329	{
	330	(sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
1da177e4 LT	331	XFS_SB_VERSION_2 : \
	332	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
	333	((sbp)->sb_versionnum \| XFS_SB_VERSION_ATTRBIT) : \
a844f451 NS	334	(XFS_SB_VERSION_4 \| XFS_SB_VERSION_ATTRBIT)));
a844f451 NS	335	}
1da177e4	336
a844f451 NS	337	static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
	338	{
	339	return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) \|\| \
	340	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	341	((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
	342	}
1da177e4	343
a844f451 NS	344	static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
	345	{
	346	(sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
1da177e4	347	XFS_SB_VERSION_3 : \
a844f451 NS	348	((sbp)->sb_versionnum \| XFS_SB_VERSION_NLINKBIT));
a844f451 NS	349	}
1da177e4	350
a844f451 NS	351	static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
	352	{
	353	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	354	((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
	355	}
1da177e4	356
a844f451 NS	357	static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
	358	{
	359	(sbp)->sb_versionnum = \
	360	(XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
	361	((sbp)->sb_versionnum \| XFS_SB_VERSION_QUOTABIT) : \
62118709	362	(xfs_sb_version_tonew((sbp)->sb_versionnum) \| \
a844f451 NS	363	XFS_SB_VERSION_QUOTABIT));
	364	}
	365
a844f451 NS	366	static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
	367	{
	368	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	369	((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
	370	}
1da177e4	371
a844f451 NS	372	static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
	373	{
	374	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	375	((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
	376	}
1da177e4	377
a844f451 NS	378	static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
	379	{
	380	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	381	((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
	382	}
1da177e4	383
a844f451 NS	384	static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
	385	{
	386	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	387	((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
	388	}
1da177e4	389
a844f451 NS	390	static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
	391	{
	392	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	393	((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
	394	}
1da177e4	395
a844f451 NS	396	static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
	397	{
	398	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	399	((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
	400	}
1da177e4	401
a844f451 NS	402	static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
	403	{
	404	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	405	((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
	406	}
1da177e4	407
a844f451 NS	408	static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
	409	{
	410	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	411	((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
	412	}
1da177e4 LT	413
	414	/*
	415	* sb_features2 bit version macros.
	416	*
d8cc890d	417	* For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
1da177e4	418	*
d8cc890d	419	* SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
62118709	420	* ((xfs_sb_version_hasmorebits(sbp) &&
d8cc890d	421	* ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
1da177e4	422	*/
a844f451	423
92821e2b DC	424	static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
92821e2b DC	425	{
62118709	426	return (xfs_sb_version_hasmorebits(sbp) && \
92821e2b DC	427	((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
	428	}
	429
a844f451 NS	430	static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
a844f451 NS	431	{
62118709	432	return (xfs_sb_version_hasmorebits(sbp)) && \
a844f451 NS	433	((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
a844f451 NS	434	}
1da177e4	435
a844f451 NS	436	static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
a844f451 NS	437	{
d8cc890d NS	438	((sbp)->sb_versionnum = \
	439	((sbp)->sb_versionnum \| XFS_SB_VERSION_MOREBITSBIT), \
	440	((sbp)->sb_features2 = \
a844f451 NS	441	((sbp)->sb_features2 \| XFS_SB_VERSION2_ATTR2BIT)));
	442	}
	443
1da177e4 LT	444	/*
	445	* end of superblock version macros
	446	*/
	447
a844f451	448	#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
1da177e4	449	#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
2bdf7cd0	450	#define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)XFS_BUF_PTR(bp))
a844f451 NS	451
	452	#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
	453	#define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
	454	XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
	455	#define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
	456	XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
1da177e4 LT	457
	458	/*
	459	* File system sector to basic block conversions.
	460	*/
	461	#define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
1da177e4 LT	462
	463	/*
	464	* File system block to basic block conversions.
	465	*/
	466	#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
	467	#define XFS_BB_TO_FSB(mp,bb) \
	468	(((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
	469	#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
	470	#define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
	471
	472	/*
	473	* File system block to byte conversions.
	474	*/
	475	#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
	476	#define XFS_B_TO_FSB(mp,b) \
	477	((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
	478	#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
	479	#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
	480
	481	#endif /* __XFS_SB_H__ */