LXR linux/fs/xfs/xfs

   1/*
   2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   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.
  13 *
  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
  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
  27struct xfs_buf;
  28struct 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 | \
  61         XFS_SB_VERSION_SECTORBIT | \
  62         XFS_SB_VERSION_MOREBITSBIT)
  63#define XFS_SB_VERSION_OKREALBITS       \
  64        (XFS_SB_VERSION_NUMBITS | \
  65         XFS_SB_VERSION_OKREALFBITS | \
  66         XFS_SB_VERSION_OKSASHFBITS)
  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
  77#define XFS_SB_VERSION2_LAZYSBCOUNTBIT  0x00000002      /* Superblk counters */
  78#define XFS_SB_VERSION2_RESERVED4BIT    0x00000004
  79#define XFS_SB_VERSION2_ATTR2BIT        0x00000008      /* Inline attr rework */
  80
  81#define XFS_SB_VERSION2_OKREALFBITS     \
  82        (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
  83         XFS_SB_VERSION2_ATTR2BIT)
  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
  90/*
  91 * Superblock - in core version.  Must match the ondisk version below.
  92 */
  93typedef struct xfs_sb {
  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 */
 147        __uint32_t      sb_features2;   /* additional feature bits */
 148} xfs_sb_t;
 149
 150/*
 151 * Superblock - on disk version.  Must match the in core version below.
 152 */
 153typedef 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
 210/*
 211 * Sequence number values for the fields.
 212 */
 213typedef 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)
 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)
 250#define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 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 | \
 256         XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 257         XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2)
 258
 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
 272#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 273
 274#define XFS_SB_GOOD_VERSION(sbp)        xfs_sb_good_version(sbp)
 275#ifdef __KERNEL__
 276static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 277{
 278        return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 279                  (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 280                   ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 281                    !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 282                      ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 283                       (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 284                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 285}
 286#else
 287static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 288{
 289        return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 290                  (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 291                   ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 292                    !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 293                      ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 294                       (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 295                  (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 296                   (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 297}
 298#endif /* __KERNEL__ */
 299
 300#define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
 301static inline unsigned xfs_sb_version_tonew(unsigned v)
 302{
 303        return ((((v) == XFS_SB_VERSION_1) ? \
 304                0 : \
 305                (((v) == XFS_SB_VERSION_2) ? \
 306                        XFS_SB_VERSION_ATTRBIT : \
 307                        (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 308                XFS_SB_VERSION_4);
 309}
 310
 311#define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
 312static inline unsigned xfs_sb_version_toold(unsigned v)
 313{
 314        return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 315                0 : \
 316                (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 317                        XFS_SB_VERSION_3 : \
 318                        (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 319                                XFS_SB_VERSION_2 : \
 320                                XFS_SB_VERSION_1)));
 321}
 322
 323#define XFS_SB_VERSION_HASATTR(sbp)     xfs_sb_version_hasattr(sbp)
 324static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 325{
 326        return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 327                 ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 328                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 329                  ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 330}
 331
 332#define XFS_SB_VERSION_ADDATTR(sbp)     xfs_sb_version_addattr(sbp)
 333static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 334{
 335        (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 336                XFS_SB_VERSION_2 : \
 337                ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 338                        ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 339                        (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 340}
 341
 342#define XFS_SB_VERSION_HASNLINK(sbp)    xfs_sb_version_hasnlink(sbp)
 343static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 344{
 345        return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 346                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 347                  ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 348}
 349
 350#define XFS_SB_VERSION_ADDNLINK(sbp)    xfs_sb_version_addnlink(sbp)
 351static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 352{
 353        (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 354                XFS_SB_VERSION_3 : \
 355                ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 356}
 357
 358#define XFS_SB_VERSION_HASQUOTA(sbp)    xfs_sb_version_hasquota(sbp)
 359static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 360{
 361        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 362                ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 363}
 364
 365#define XFS_SB_VERSION_ADDQUOTA(sbp)    xfs_sb_version_addquota(sbp)
 366static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 367{
 368        (sbp)->sb_versionnum = \
 369                 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 370                        ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 371                        (XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
 372                         XFS_SB_VERSION_QUOTABIT));
 373}
 374
 375#define XFS_SB_VERSION_HASALIGN(sbp)    xfs_sb_version_hasalign(sbp)
 376static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 377{
 378        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 379                ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 380}
 381
 382#define XFS_SB_VERSION_SUBALIGN(sbp)    xfs_sb_version_subalign(sbp)
 383static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
 384{
 385        (sbp)->sb_versionnum = \
 386         XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
 387}
 388
 389#define XFS_SB_VERSION_HASDALIGN(sbp)   xfs_sb_version_hasdalign(sbp)
 390static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 391{
 392        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 393                ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 394}
 395
 396#define XFS_SB_VERSION_ADDDALIGN(sbp)   xfs_sb_version_adddalign(sbp)
 397static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
 398{
 399        return (sbp)->sb_versionnum = \
 400                ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
 401}
 402
 403#define XFS_SB_VERSION_HASSHARED(sbp)   xfs_sb_version_hasshared(sbp)
 404static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 405{
 406        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 407                ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 408}
 409
 410#define XFS_SB_VERSION_ADDSHARED(sbp)   xfs_sb_version_addshared(sbp)
 411static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
 412{
 413        return (sbp)->sb_versionnum = \
 414                ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
 415}
 416
 417#define XFS_SB_VERSION_SUBSHARED(sbp)   xfs_sb_version_subshared(sbp)
 418static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
 419{
 420        return (sbp)->sb_versionnum = \
 421                ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
 422}
 423
 424#define XFS_SB_VERSION_HASDIRV2(sbp)    xfs_sb_version_hasdirv2(sbp)
 425static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 426{
 427        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 428                ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 429}
 430
 431#define XFS_SB_VERSION_HASLOGV2(sbp)   xfs_sb_version_haslogv2(sbp)
 432static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 433{
 434        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 435                ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 436}
 437
 438#define XFS_SB_VERSION_HASEXTFLGBIT(sbp)        xfs_sb_version_hasextflgbit(sbp)
 439static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 440{
 441        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 442                ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 443}
 444
 445#define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)        xfs_sb_version_addextflgbit(sbp)
 446static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
 447{
 448        return (sbp)->sb_versionnum = \
 449                ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
 450}
 451
 452#define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)        xfs_sb_version_subextflgbit(sbp)
 453static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
 454{
 455        return (sbp)->sb_versionnum = \
 456                ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
 457}
 458
 459#define XFS_SB_VERSION_HASSECTOR(sbp)   xfs_sb_version_hassector(sbp)
 460static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 461{
 462        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 463                ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 464}
 465
 466#define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
 467static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 468{
 469        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 470                ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 471}
 472
 473/*
 474 * sb_features2 bit version macros.
 475 *
 476 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 477 *
 478 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 479 *      ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
 480 *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 481 */
 482
 483static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 484{
 485        return (XFS_SB_VERSION_HASMOREBITS(sbp) &&      \
 486                ((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
 487}
 488
 489#define XFS_SB_VERSION_HASATTR2(sbp)    xfs_sb_version_hasattr2(sbp)
 490static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 491{
 492        return (XFS_SB_VERSION_HASMOREBITS(sbp)) &&     \
 493                ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 494}
 495
 496#define XFS_SB_VERSION_ADDATTR2(sbp)    xfs_sb_version_addattr2(sbp)
 497static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 498{
 499        ((sbp)->sb_versionnum = \
 500                ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 501        ((sbp)->sb_features2 =  \
 502                ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 503}
 504
 505/*
 506 * end of superblock version macros
 507 */
 508
 509#define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 510#define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 511#define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)XFS_BUF_PTR(bp))
 512
 513#define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 514#define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 515                        XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 516#define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 517                        XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 518
 519/*
 520 * File system sector to basic block conversions.
 521 */
 522#define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 523
 524/*
 525 * File system block to basic block conversions.
 526 */
 527#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 528#define XFS_BB_TO_FSB(mp,bb)    \
 529        (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 530#define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 531#define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 532
 533/*
 534 * File system block to byte conversions.
 535 */
 536#define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 537#define XFS_B_TO_FSB(mp,b)      \
 538        ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 539#define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 540#define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 541
 542#endif  /* __XFS_SB_H__ */
 543