xfs_sb.h

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/*
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 * 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_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_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_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_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_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_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)
 
/*
 * 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 file system/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__ */