[thirdparty/xfsprogs-dev.git] / include / xfs_sb.h

/*
 * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
 * 
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 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.
 * 
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 * 
 * 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.
 * 
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 * 
 * http://www.sgi.com 
 * 
 * For further information regarding this notice, see: 
 * 
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */
#ifndef __XFS_SB_H__
#define	__XFS_SB_H__

/*
 * 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[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_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) */
        __uint8_t       sb_dummy[7];    /* padding */
} 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_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_DUMMY,
	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_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_UUID | 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)
#ifdef __KERNEL__
#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 /* __KERNEL__ */
#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	((xfs_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, xfs_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, xfs_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)
xfs_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	/* __XFS_SB_H__ */
Commit	Line	Data
2bd0ea18 NS	1	/*
	2	* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of version 2 of the GNU General Public License as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it would be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	11	*
	12	* Further, this software is distributed without any warranty that it is
	13	* free of the rightful claim of any third person regarding infringement
	14	* or the like. Any license provided herein, whether implied or
	15	* otherwise, applies only to this software file. Patent licenses, if
	16	* any, provided herein do not apply to combinations of this program with
	17	* other software, or any other product whatsoever.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write the Free Software Foundation, Inc., 59
	21	* Temple Place - Suite 330, Boston MA 02111-1307, USA.
	22	*
	23	* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
	24	* Mountain View, CA 94043, or:
	25	*
	26	* http://www.sgi.com
	27	*
	28	* For further information regarding this notice, see:
	29	*
	30	* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
	31	*/
	32	#ifndef __XFS_SB_H__
	33	#define __XFS_SB_H__
	34
	35	/*
	36	* Super block
	37	* Fits into a 512-byte buffer at daddr_t 0 of each allocation group.
	38	* Only the first of these is ever updated except during growfs.
	39	*/
	40
	41	struct xfs_buf;
	42	struct xfs_mount;
	43
	44	#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */
	45	#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
	46	#define XFS_SB_VERSION_2 2 /* 6.2 - attributes */
	47	#define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */
	48	#define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */
	49	#define XFS_SB_VERSION_NUMBITS 0x000f
	50	#define XFS_SB_VERSION_ALLFBITS 0xfff0
	51	#define XFS_SB_VERSION_SASHFBITS 0xf000
	52	#define XFS_SB_VERSION_REALFBITS 0x0ff0
	53	#define XFS_SB_VERSION_ATTRBIT 0x0010
	54	#define XFS_SB_VERSION_NLINKBIT 0x0020
	55	#define XFS_SB_VERSION_QUOTABIT 0x0040
	56	#define XFS_SB_VERSION_ALIGNBIT 0x0080
	57	#define XFS_SB_VERSION_DALIGNBIT 0x0100
	58	#define XFS_SB_VERSION_SHAREDBIT 0x0200
	59	#define XFS_SB_VERSION_EXTFLGBIT 0x1000
	60	#define XFS_SB_VERSION_DIRV2BIT 0x2000
	61	#define XFS_SB_VERSION_OKSASHFBITS \
	62	(XFS_SB_VERSION_EXTFLGBIT \| \
	63	XFS_SB_VERSION_DIRV2BIT)
	64	#define XFS_SB_VERSION_OKREALFBITS \
65	(XFS_SB_VERSION_ATTRBIT \| \
66	XFS_SB_VERSION_NLINKBIT \| \
67	XFS_SB_VERSION_QUOTABIT \| \
68	XFS_SB_VERSION_ALIGNBIT \| \
69	XFS_SB_VERSION_DALIGNBIT \| \
70	XFS_SB_VERSION_SHAREDBIT)
71	#define XFS_SB_VERSION_OKSASHBITS \
72	(XFS_SB_VERSION_NUMBITS \| \
73	XFS_SB_VERSION_REALFBITS \| \
74	XFS_SB_VERSION_OKSASHFBITS)
75	#define XFS_SB_VERSION_OKREALBITS \
76	(XFS_SB_VERSION_NUMBITS \| \
77	XFS_SB_VERSION_OKREALFBITS \| \
78	XFS_SB_VERSION_OKSASHFBITS)
79	#define XFS_SB_VERSION_MKFS(ia,dia,extflag,dirv2) \
80	(((ia) \|\| (dia) \|\| (extflag) \|\| (dirv2)) ? \
81	(XFS_SB_VERSION_4 \| \
82	((ia) ? XFS_SB_VERSION_ALIGNBIT : 0) \| \
83	((dia) ? XFS_SB_VERSION_DALIGNBIT : 0) \| \
84	((extflag) ? XFS_SB_VERSION_EXTFLGBIT : 0) \| \
85	((dirv2) ? XFS_SB_VERSION_DIRV2BIT : 0)) : \
86	XFS_SB_VERSION_1)
87
88	typedef struct xfs_sb
89	{
90	__uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
91	__uint32_t sb_blocksize; /* logical block size, bytes */
92	xfs_drfsbno_t sb_dblocks; /* number of data blocks */
93	xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
94	xfs_drtbno_t sb_rextents; /* number of realtime extents */
95	uuid_t sb_uuid; /* file system unique id */
96	xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
97	xfs_ino_t sb_rootino; /* root inode number */
98	xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
99	xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
100	xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
101	xfs_agblock_t sb_agblocks; /* size of an allocation group */
102	xfs_agnumber_t sb_agcount; /* number of allocation groups */
103	xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
104	xfs_extlen_t sb_logblocks; /* number of log blocks */
105	__uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
106	__uint16_t sb_sectsize; /* volume sector size, bytes */
107	__uint16_t sb_inodesize; /* inode size, bytes */
108	__uint16_t sb_inopblock; /* inodes per block */
109	char sb_fname[12]; /* file system name */
110	__uint8_t sb_blocklog; /* log2 of sb_blocksize */
111	__uint8_t sb_sectlog; /* log2 of sb_sectsize */
112	__uint8_t sb_inodelog; /* log2 of sb_inodesize */
113	__uint8_t sb_inopblog; /* log2 of sb_inopblock */
114	__uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
115	__uint8_t sb_rextslog; /* log2 of sb_rextents */
116	__uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
117	__uint8_t sb_imax_pct; /* max % of fs for inode space */
118	/* statistics */
119	/*
120	* These fields must remain contiguous. If you really
121	* want to change their layout, make sure you fix the
122	* code in xfs_trans_apply_sb_deltas().
123	*/
124	__uint64_t sb_icount; /* allocated inodes */
125	__uint64_t sb_ifree; /* free inodes */
126	__uint64_t sb_fdblocks; /* free data blocks */
127	__uint64_t sb_frextents; /* free realtime extents */
128	/*
129	* End contiguous fields.
130	*/
131	xfs_ino_t sb_uquotino; /* user quota inode */
132	xfs_ino_t sb_pquotino; /* project quota inode */
133	__uint16_t sb_qflags; /* quota flags */
134	__uint8_t sb_flags; /* misc. flags */
135	__uint8_t sb_shared_vn; /* shared version number */
136	xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
137	__uint32_t sb_unit; /* stripe or raid unit */
138	__uint32_t sb_width; /* stripe or raid width */
139	__uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
140	__uint8_t sb_dummy[7]; /* padding */
141	} xfs_sb_t;
142
143	/*
144	* Sequence number values for the fields.
145	*/
146	typedef enum {
147	XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
148	XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
149	XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
150	XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
151	XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
152	XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
153	XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
154	XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
155	XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
156	XFS_SBS_PQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
157	XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
158	XFS_SBS_DUMMY,
159	XFS_SBS_FIELDCOUNT
160	} xfs_sb_field_t;
161
162	/*
163	* Mask values, defined based on the xfs_sb_field_t values.
164	* Only define the ones we're using.
165	*/
166	#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
167	#define XFS_SB_UUID XFS_SB_MVAL(UUID)
168	#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
169	#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
170	#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
171	#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
172	#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
173	#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
174	#define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO)
175	#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
176	#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
177	#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
178	#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
179	#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
180	#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
181	#define XFS_SB_MOD_BITS \
182	(XFS_SB_UUID \| XFS_SB_ROOTINO \| XFS_SB_RBMINO \| XFS_SB_RSUMINO \| \
183	XFS_SB_VERSIONNUM \| XFS_SB_UQUOTINO \| XFS_SB_PQUOTINO \| \
184	XFS_SB_QFLAGS \| XFS_SB_SHARED_VN \| XFS_SB_UNIT \| XFS_SB_WIDTH)
185
186	/*
187	* Misc. Flags - warning - these will be cleared by xfs_repair unless
188	* a feature bit is set when the flag is used.
189	*/
190	#define XFS_SBF_NOFLAGS 0x00 /* no flags set */
191	#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
192
193	/*
194	* define max. shared version we can interoperate with
195	*/
196	#define XFS_SB_MAX_SHARED_VN 0
197
198	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_NUM)
199	int xfs_sb_version_num(xfs_sb_t *sbp);
200	#define XFS_SB_VERSION_NUM(sbp) xfs_sb_version_num(sbp)
201	#else
202	#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
203	#endif
204
205	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_GOOD_VERSION)
206	int xfs_sb_good_version(xfs_sb_t *sbp);
207	#define XFS_SB_GOOD_VERSION(sbp) xfs_sb_good_version(sbp)
208	#else
209	#define XFS_SB_GOOD_VERSION_INT(sbp) \
210	((((sbp)->sb_versionnum >= XFS_SB_VERSION_1) && \
211	((sbp)->sb_versionnum <= XFS_SB_VERSION_3)) \|\| \
212	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
213	!((sbp)->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS)
214	#ifdef __KERNEL__
215	#define XFS_SB_GOOD_VERSION(sbp) \
216	(XFS_SB_GOOD_VERSION_INT(sbp) && \
217	(sbp)->sb_shared_vn <= XFS_SB_MAX_SHARED_VN) ))
218	#else
219	/*
220	* extra 2 paren's here (( to unconfuse paren-matching editors
221	* like vi because XFS_SB_GOOD_VERSION_INT is a partial expression
222	* and the two XFS_SB_GOOD_VERSION's each 2 more close paren's to
223	* complete the expression.
224	*/
225	#define XFS_SB_GOOD_VERSION(sbp) \
226	(XFS_SB_GOOD_VERSION_INT(sbp) && \
227	(!((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) \|\| \
228	(sbp)->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)) ))
229	#endif /* __KERNEL__ */
230	#endif
231
232	#define XFS_SB_GOOD_SASH_VERSION(sbp) \
233	((((sbp)->sb_versionnum >= XFS_SB_VERSION_1) && \
234	((sbp)->sb_versionnum <= XFS_SB_VERSION_3)) \|\| \
235	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
236	!((sbp)->sb_versionnum & ~XFS_SB_VERSION_OKSASHBITS)))
237
238	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_TONEW)
239	unsigned xfs_sb_version_tonew(unsigned v);
240	#define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
241	#else
242	#define XFS_SB_VERSION_TONEW(v) \
243	((((v) == XFS_SB_VERSION_1) ? \
244	0 : \
245	(((v) == XFS_SB_VERSION_2) ? \
246	XFS_SB_VERSION_ATTRBIT : \
247	(XFS_SB_VERSION_ATTRBIT \| XFS_SB_VERSION_NLINKBIT))) \| \
248	XFS_SB_VERSION_4)
249	#endif
250
251	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_TOOLD)
252	unsigned xfs_sb_version_toold(unsigned v);
253	#define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
254	#else
255	#define XFS_SB_VERSION_TOOLD(v) \
256	(((v) & (XFS_SB_VERSION_QUOTABIT \| XFS_SB_VERSION_ALIGNBIT)) ? \
257	0 : \
258	(((v) & XFS_SB_VERSION_NLINKBIT) ? \
259	XFS_SB_VERSION_3 : \
260	(((v) & XFS_SB_VERSION_ATTRBIT) ? \
261	XFS_SB_VERSION_2 : \
262	XFS_SB_VERSION_1)))
263	#endif
264
265	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASATTR)
266	int xfs_sb_version_hasattr(xfs_sb_t *sbp);
267	#define XFS_SB_VERSION_HASATTR(sbp) xfs_sb_version_hasattr(sbp)
268	#else
269	#define XFS_SB_VERSION_HASATTR(sbp) \
270	(((sbp)->sb_versionnum == XFS_SB_VERSION_2) \|\| \
271	((sbp)->sb_versionnum == XFS_SB_VERSION_3) \|\| \
272	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
273	((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT)))
274	#endif
275
276	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDATTR)
277	void xfs_sb_version_addattr(xfs_sb_t *sbp);
278	#define XFS_SB_VERSION_ADDATTR(sbp) xfs_sb_version_addattr(sbp)
279	#else
280	#define XFS_SB_VERSION_ADDATTR(sbp) \
281	((sbp)->sb_versionnum = \
282	(((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
283	XFS_SB_VERSION_2 : \
284	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
285	((sbp)->sb_versionnum \| XFS_SB_VERSION_ATTRBIT) : \
286	(XFS_SB_VERSION_4 \| XFS_SB_VERSION_ATTRBIT))))
287	#endif
288
289	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASNLINK)
290	int xfs_sb_version_hasnlink(xfs_sb_t *sbp);
291	#define XFS_SB_VERSION_HASNLINK(sbp) xfs_sb_version_hasnlink(sbp)
292	#else
293	#define XFS_SB_VERSION_HASNLINK(sbp) \
294	(((sbp)->sb_versionnum == XFS_SB_VERSION_3) \|\| \
295	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
296	((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT)))
297	#endif
298
299	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDNLINK)
300	void xfs_sb_version_addnlink(xfs_sb_t *sbp);
301	#define XFS_SB_VERSION_ADDNLINK(sbp) xfs_sb_version_addnlink(sbp)
302	#else
303	#define XFS_SB_VERSION_ADDNLINK(sbp) \
304	((sbp)->sb_versionnum = \
305	((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
306	XFS_SB_VERSION_3 : \
307	((sbp)->sb_versionnum \| XFS_SB_VERSION_NLINKBIT)))
308	#endif
309
310	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASQUOTA)
311	int xfs_sb_version_hasquota(xfs_sb_t *sbp);
312	#define XFS_SB_VERSION_HASQUOTA(sbp) xfs_sb_version_hasquota(sbp)
313	#else
314	#define XFS_SB_VERSION_HASQUOTA(sbp) \
315	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
316	((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT))
317	#endif
318
319	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDQUOTA)
320	void xfs_sb_version_addquota(xfs_sb_t *sbp);
321	#define XFS_SB_VERSION_ADDQUOTA(sbp) xfs_sb_version_addquota(sbp)
322	#else
323	#define XFS_SB_VERSION_ADDQUOTA(sbp) \
324	((sbp)->sb_versionnum = \
325	(XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
326	((sbp)->sb_versionnum \| XFS_SB_VERSION_QUOTABIT) : \
327	(XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) \| \
328	XFS_SB_VERSION_QUOTABIT)))
329	#endif
330
331	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASALIGN)
332	int xfs_sb_version_hasalign(xfs_sb_t *sbp);
333	#define XFS_SB_VERSION_HASALIGN(sbp) xfs_sb_version_hasalign(sbp)
334	#else
335	#define XFS_SB_VERSION_HASALIGN(sbp) \
336	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
337	((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT))
338	#endif
339
340	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_SUBALIGN)
341	void xfs_sb_version_subalign(xfs_sb_t *sbp);
342	#define XFS_SB_VERSION_SUBALIGN(sbp) xfs_sb_version_subalign(sbp)
343	#else
344	#define XFS_SB_VERSION_SUBALIGN(sbp) \
345	((sbp)->sb_versionnum = \
346	XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT))
347	#endif
348
349	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASDALIGN)
350	int xfs_sb_version_hasdalign(xfs_sb_t *sbp);
351	#define XFS_SB_VERSION_HASDALIGN(sbp) xfs_sb_version_hasdalign(sbp)
352	#else
353	#define XFS_SB_VERSION_HASDALIGN(sbp) \
354	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
355	((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT))
356	#endif
357
358	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDDALIGN)
359	int xfs_sb_version_adddalign(xfs_sb_t *sbp);
360	#define XFS_SB_VERSION_ADDDALIGN(sbp) xfs_sb_version_adddalign(sbp)
361	#else
362	#define XFS_SB_VERSION_ADDDALIGN(sbp) \
363	((sbp)->sb_versionnum = \
364	((sbp)->sb_versionnum \| XFS_SB_VERSION_DALIGNBIT))
365	#endif
366
367	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASSHARED)
368	int xfs_sb_version_hasshared(xfs_sb_t *sbp);
369	#define XFS_SB_VERSION_HASSHARED(sbp) xfs_sb_version_hasshared(sbp)
370	#else
371	#define XFS_SB_VERSION_HASSHARED(sbp) \
372	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
373	((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT))
374	#endif
375
376	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDSHARED)
377	int xfs_sb_version_addshared(xfs_sb_t *sbp);
378	#define XFS_SB_VERSION_ADDSHARED(sbp) xfs_sb_version_addshared(sbp)
379	#else
380	#define XFS_SB_VERSION_ADDSHARED(sbp) \
381	((sbp)->sb_versionnum = \
382	((sbp)->sb_versionnum \| XFS_SB_VERSION_SHAREDBIT))
383	#endif
384
385	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_SUBSHARED)
386	int xfs_sb_version_subshared(xfs_sb_t *sbp);
387	#define XFS_SB_VERSION_SUBSHARED(sbp) xfs_sb_version_subshared(sbp)
388	#else
389	#define XFS_SB_VERSION_SUBSHARED(sbp) \
390	((sbp)->sb_versionnum = \
391	((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT))
392	#endif
393
394	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASDIRV2)
395	int xfs_sb_version_hasdirv2(xfs_sb_t *sbp);
396	#define XFS_SB_VERSION_HASDIRV2(sbp) xfs_sb_version_hasdirv2(sbp)
397	#else
398	#define XFS_SB_VERSION_HASDIRV2(sbp) \
399	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
400	((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT))
401	#endif
402
403	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_HASEXTFLGBIT)
404	int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp);
405	#define XFS_SB_VERSION_HASEXTFLGBIT(sbp) xfs_sb_version_hasextflgbit(sbp)
406	#else
407	#define XFS_SB_VERSION_HASEXTFLGBIT(sbp) \
408	((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
409	((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT))
410	#endif
411
412	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_ADDEXTFLGBIT)
413	int xfs_sb_version_addextflgbit(xfs_sb_t *sbp);
414	#define XFS_SB_VERSION_ADDEXTFLGBIT(sbp) xfs_sb_version_addextflgbit(sbp)
415	#else
416	#define XFS_SB_VERSION_ADDEXTFLGBIT(sbp) \
417	((sbp)->sb_versionnum = \
418	((sbp)->sb_versionnum \| XFS_SB_VERSION_EXTFLGBIT))
419	#endif
420
421	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_VERSION_SUBEXTFLGBIT)
422	int xfs_sb_version_subextflgbit(xfs_sb_t *sbp);
423	#define XFS_SB_VERSION_SUBEXTFLGBIT(sbp) xfs_sb_version_subextflgbit(sbp)
424	#else
425	#define XFS_SB_VERSION_SUBEXTFLGBIT(sbp) \
426	((sbp)->sb_versionnum = \
427	((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT))
428	#endif
429
430	/*
431	* end of superblock version macros
432	*/
433
434	#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
435	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_SB_BLOCK)
436	xfs_agblock_t xfs_sb_block(struct xfs_mount *mp);
437	#define XFS_SB_BLOCK(mp) xfs_sb_block(mp)
438	#else
439	#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
440	#endif
441
442	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_HDR_BLOCK)
443	xfs_agblock_t xfs_hdr_block(struct xfs_mount *mp, xfs_daddr_t d);
444	#define XFS_HDR_BLOCK(mp,d) xfs_hdr_block(mp,d)
445	#else
446	#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp,d)))
447	#endif
448	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_FSB)
449	xfs_fsblock_t xfs_daddr_to_fsb(struct xfs_mount *mp, xfs_daddr_t d);
450	#define XFS_DADDR_TO_FSB(mp,d) xfs_daddr_to_fsb(mp,d)
451	#else
452	#define XFS_DADDR_TO_FSB(mp,d) \
453	XFS_AGB_TO_FSB(mp, XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
454	#endif
455	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_FSB_TO_DADDR)
456	xfs_daddr_t xfs_fsb_to_daddr(struct xfs_mount *mp, xfs_fsblock_t fsbno);
457	#define XFS_FSB_TO_DADDR(mp,fsbno) xfs_fsb_to_daddr(mp,fsbno)
458	#else
459	#define XFS_FSB_TO_DADDR(mp,fsbno) \
460	XFS_AGB_TO_DADDR(mp, XFS_FSB_TO_AGNO(mp,fsbno), \
461	XFS_FSB_TO_AGBNO(mp,fsbno))
462	#endif
463
464	/*
465	* File system block to basic block conversions.
466	*/
467	#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
468	#define XFS_BB_TO_FSB(mp,bb) \
469	(((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
470	#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
471	#define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
472
473	/*
474	* File system block to byte conversions.
475	*/
476	#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << \
477	(mp)->m_sb.sb_blocklog)
478	#define XFS_B_TO_FSB(mp,b) \
479	((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
480	#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
481	#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
482
483	#if XFS_WANT_FUNCS \|\| (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_SBP)
484	xfs_sb_t xfs_buf_to_sbp(struct xfs_buf bp);
485	#define XFS_BUF_TO_SBP(bp) xfs_buf_to_sbp(bp)
486	#else
487	#define XFS_BUF_TO_SBP(bp) ((xfs_sb_t *)XFS_BUF_PTR(bp))
488	#endif
489
490	#endif /* __XFS_SB_H__ */