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Encumbrance review done.
Add copyright and license words consistent with GPL.
Refer to http://fsg.melbourne.sgi.com/reviews/ for details.

There is a slight change in the license terms and conditions words
to go with the copyrights, so most of the files are not getting
new GPL's, just updated versions ... but there are 20-30 more files
here as well.

/*
 * Copyright (C) 1999 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; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * This program is distributed in the hope that it will 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */
#ifndef _FS_XFS_SB_H
#define	_FS_XFS_SB_H

#ident	"$Revision: 1.41 $"

/*
 * Super block
 * Fits into a 512-byte buffer at daddr_t 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_EXTFLGBIT	0x1000
#define	XFS_SB_VERSION_DIRV2BIT		0x2000
#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)
#define	XFS_SB_VERSION_OKSASHBITS	\
	(XFS_SB_VERSION_NUMBITS | \
	 XFS_SB_VERSION_REALFBITS | \
	 XFS_SB_VERSION_OKSASHFBITS)
#define	XFS_SB_VERSION_OKREALBITS	\
	(XFS_SB_VERSION_NUMBITS | \
	 XFS_SB_VERSION_OKREALFBITS | \
	 XFS_SB_VERSION_OKSASHFBITS)
#define	XFS_SB_VERSION_MKFS(ia,dia,extflag,dirv2)	\
	(((ia) || (dia) || (extflag) || (dirv2)) ? \
		(XFS_SB_VERSION_4 | \
		 ((ia) ? XFS_SB_VERSION_ALIGNBIT : 0) | \
		 ((dia) ? XFS_SB_VERSION_DALIGNBIT : 0) | \
		 ((extflag) ? XFS_SB_VERSION_EXTFLGBIT : 0) | \
		 ((dirv2) ? XFS_SB_VERSION_DIRV2BIT : 0)) : \
		XFS_SB_VERSION_1)

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[6];	/* file system name */
	char		sb_fpack[6];	/* file system pack 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_pquotino;	/* project 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) */
} 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_FPACK, 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_PQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
	XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
	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_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_PQUOTINO		XFS_SB_MVAL(PQUOTINO)
#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_NUM_BITS		((int)XFS_SBS_FIELDCOUNT)
#define	XFS_SB_ALL_BITS		((1LL << XFS_SB_NUM_BITS) - 1)
#define	XFS_SB_MOD_BITS		\
	(XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | XFS_SB_VERSIONNUM | \
	 XFS_SB_UQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS | \
	 XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH)

/*
 * 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

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_NUM)
int xfs_sb_version_num(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_NUM(sbp)	xfs_sb_version_num(sbp)
#else
#define	XFS_SB_VERSION_NUM(sbp)	((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_GOOD_VERSION)
int xfs_sb_good_version(xfs_sb_t *sbp);
#define	XFS_SB_GOOD_VERSION(sbp)	xfs_sb_good_version(sbp)
#else
#define	XFS_SB_GOOD_VERSION_INT(sbp)	\
	((((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)
#ifndef XFS_REPAIR_SIM
#define	XFS_SB_GOOD_VERSION(sbp)	\
	(XFS_SB_GOOD_VERSION_INT(sbp) && \
	  (sbp)->sb_shared_vn <= XFS_SB_MAX_SHARED_VN) ))
#else
/*
 * extra 2 paren's here (( to unconfuse paren-matching editors
 * like vi because XFS_SB_GOOD_VERSION_INT is a partial expression
 * and the two XFS_SB_GOOD_VERSION's each 2 more close paren's to
 * complete the expression.
 */
#define XFS_SB_GOOD_VERSION(sbp)	\
	(XFS_SB_GOOD_VERSION_INT(sbp) && \
	  (!((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
	   (sbp)->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)) ))
#endif /* XFS_REPAIR_SIM */
#endif

#define	XFS_SB_GOOD_SASH_VERSION(sbp)	\
	((((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_OKSASHBITS)))

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_TONEW)
unsigned xfs_sb_version_tonew(unsigned v);
#define	XFS_SB_VERSION_TONEW(v)	xfs_sb_version_tonew(v)
#else
#define	XFS_SB_VERSION_TONEW(v)	\
	((((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)
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_TOOLD)
unsigned xfs_sb_version_toold(unsigned v);
#define	XFS_SB_VERSION_TOOLD(v)	xfs_sb_version_toold(v)
#else
#define	XFS_SB_VERSION_TOOLD(v)	\
	(((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)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASATTR)
int xfs_sb_version_hasattr(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_HASATTR(sbp)	xfs_sb_version_hasattr(sbp)
#else
#define	XFS_SB_VERSION_HASATTR(sbp)	\
	(((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)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDATTR)
void xfs_sb_version_addattr(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_ADDATTR(sbp)	xfs_sb_version_addattr(sbp)
#else
#define	XFS_SB_VERSION_ADDATTR(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))))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASNLINK)
int xfs_sb_version_hasnlink(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_HASNLINK(sbp)	xfs_sb_version_hasnlink(sbp)
#else
#define	XFS_SB_VERSION_HASNLINK(sbp)	\
	(((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
	 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	  ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDNLINK)
void xfs_sb_version_addnlink(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_ADDNLINK(sbp)	xfs_sb_version_addnlink(sbp)
#else
#define	XFS_SB_VERSION_ADDNLINK(sbp)	\
	((sbp)->sb_versionnum = \
	 ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
		XFS_SB_VERSION_3 : \
		((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASQUOTA)
int xfs_sb_version_hasquota(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_HASQUOTA(sbp)	xfs_sb_version_hasquota(sbp)
#else
#define	XFS_SB_VERSION_HASQUOTA(sbp)	\
	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDQUOTA)
void xfs_sb_version_addquota(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_ADDQUOTA(sbp)	xfs_sb_version_addquota(sbp)
#else
#define	XFS_SB_VERSION_ADDQUOTA(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)))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASALIGN)
int xfs_sb_version_hasalign(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_HASALIGN(sbp)	xfs_sb_version_hasalign(sbp)
#else
#define	XFS_SB_VERSION_HASALIGN(sbp)	\
	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_SUBALIGN)
void xfs_sb_version_subalign(xfs_sb_t *sbp);
#define	XFS_SB_VERSION_SUBALIGN(sbp)	xfs_sb_version_subalign(sbp)
#else
#define	XFS_SB_VERSION_SUBALIGN(sbp)	\
	((sbp)->sb_versionnum = \
	 XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASDALIGN)
int xfs_sb_version_hasdalign(xfs_sb_t *sbp);
#define XFS_SB_VERSION_HASDALIGN(sbp)	xfs_sb_version_hasdalign(sbp)
#else
#define XFS_SB_VERSION_HASDALIGN(sbp)	\
	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDDALIGN)
int xfs_sb_version_adddalign(xfs_sb_t *sbp);
#define XFS_SB_VERSION_ADDDALIGN(sbp)	xfs_sb_version_adddalign(sbp)
#else
#define XFS_SB_VERSION_ADDDALIGN(sbp)	\
        ((sbp)->sb_versionnum = \
                ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASSHARED)
int xfs_sb_version_hasshared(xfs_sb_t *sbp);
#define XFS_SB_VERSION_HASSHARED(sbp)	xfs_sb_version_hasshared(sbp)
#else
#define XFS_SB_VERSION_HASSHARED(sbp)	\
        ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDSHARED)
int xfs_sb_version_addshared(xfs_sb_t *sbp);
#define XFS_SB_VERSION_ADDSHARED(sbp)	xfs_sb_version_addshared(sbp)
#else
#define XFS_SB_VERSION_ADDSHARED(sbp)	\
        ((sbp)->sb_versionnum = \
                ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_SUBSHARED)
int xfs_sb_version_subshared(xfs_sb_t *sbp);
#define XFS_SB_VERSION_SUBSHARED(sbp)	xfs_sb_version_subshared(sbp)
#else
#define XFS_SB_VERSION_SUBSHARED(sbp)	\
        ((sbp)->sb_versionnum = \
                ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASDIRV2)
int xfs_sb_version_hasdirv2(xfs_sb_t *sbp);
#define XFS_SB_VERSION_HASDIRV2(sbp)	xfs_sb_version_hasdirv2(sbp)
#else
#define XFS_SB_VERSION_HASDIRV2(sbp)	\
        ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASEXTFLGBIT)
int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp);
#define XFS_SB_VERSION_HASEXTFLGBIT(sbp)	xfs_sb_version_hasextflgbit(sbp)
#else
#define XFS_SB_VERSION_HASEXTFLGBIT(sbp)	\
        ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
	 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDEXTFLGBIT)
int xfs_sb_version_addextflgbit(xfs_sb_t *sbp);
#define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)	xfs_sb_version_addextflgbit(sbp)
#else
#define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)	\
        ((sbp)->sb_versionnum = \
                ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT))
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_SUBEXTFLGBIT)
int xfs_sb_version_subextflgbit(xfs_sb_t *sbp);
#define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)	xfs_sb_version_subextflgbit(sbp)
#else
#define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)	\
        ((sbp)->sb_versionnum = \
                ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT))
#endif

/*
 * end of superblock version macros
 */

#define	XFS_SB_DADDR	((daddr_t)0)		/* daddr in filesystem/ag */
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_SB_BLOCK)
xfs_agblock_t xfs_sb_block(struct xfs_mount *mp);
#define	XFS_SB_BLOCK(mp)	xfs_sb_block(mp)
#else
#define	XFS_SB_BLOCK(mp)	XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_HDR_BLOCK)
xfs_agblock_t xfs_hdr_block(struct xfs_mount *mp, daddr_t d);
#define	XFS_HDR_BLOCK(mp,d)	xfs_hdr_block(mp,d)
#else
#define	XFS_HDR_BLOCK(mp,d)	((xfs_agblock_t)(XFS_BB_TO_FSBT(mp,d)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_FSB)
xfs_fsblock_t xfs_daddr_to_fsb(struct xfs_mount *mp, daddr_t d);
#define	XFS_DADDR_TO_FSB(mp,d)		xfs_daddr_to_fsb(mp,d)
#else
#define	XFS_DADDR_TO_FSB(mp,d) \
	XFS_AGB_TO_FSB(mp, XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FSB_TO_DADDR)
daddr_t xfs_fsb_to_daddr(struct xfs_mount *mp, xfs_fsblock_t fsbno);
#define	XFS_FSB_TO_DADDR(mp,fsbno)	xfs_fsb_to_daddr(mp,fsbno)
#else
#define	XFS_FSB_TO_DADDR(mp,fsbno) \
	XFS_AGB_TO_DADDR(mp, XFS_FSB_TO_AGNO(mp,fsbno), \
			 XFS_FSB_TO_AGBNO(mp,fsbno))
#endif

/*
 * 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)     

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_SBP)
xfs_sb_t *xfs_buf_to_sbp(struct xfs_buf *bp);
#define	XFS_BUF_TO_SBP(bp)	xfs_buf_to_sbp(bp)
#else
#define	XFS_BUF_TO_SBP(bp)	((xfs_sb_t *)XFS_BUF_PTR(bp))
#endif

#endif	/* !_FS_XFS_SB_H */