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_BORGBIT          0x4000  /* ASCII only case-insens. */
  50#define XFS_SB_VERSION_MOREBITSBIT      0x8000
  51#define XFS_SB_VERSION_OKSASHFBITS      \
  52        (XFS_SB_VERSION_EXTFLGBIT | \
  53         XFS_SB_VERSION_DIRV2BIT | \
  54         XFS_SB_VERSION_BORGBIT)
  55#define XFS_SB_VERSION_OKREALFBITS      \
  56        (XFS_SB_VERSION_ATTRBIT | \
  57         XFS_SB_VERSION_NLINKBIT | \
  58         XFS_SB_VERSION_QUOTABIT | \
  59         XFS_SB_VERSION_ALIGNBIT | \
  60         XFS_SB_VERSION_DALIGNBIT | \
  61         XFS_SB_VERSION_SHAREDBIT | \
  62         XFS_SB_VERSION_LOGV2BIT | \
  63         XFS_SB_VERSION_SECTORBIT | \
  64         XFS_SB_VERSION_MOREBITSBIT)
  65#define XFS_SB_VERSION_OKREALBITS       \
  66        (XFS_SB_VERSION_NUMBITS | \
  67         XFS_SB_VERSION_OKREALFBITS | \
  68         XFS_SB_VERSION_OKSASHFBITS)
  69
  70/*
  71 * There are two words to hold XFS "feature" bits: the original
  72 * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
  73 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
  74 *
  75 * These defines represent bits in sb_features2.
  76 */
  77#define XFS_SB_VERSION2_REALFBITS       0x00ffffff      /* Mask: features */
  78#define XFS_SB_VERSION2_RESERVED1BIT    0x00000001
  79#define XFS_SB_VERSION2_LAZYSBCOUNTBIT  0x00000002      /* Superblk counters */
  80#define XFS_SB_VERSION2_RESERVED4BIT    0x00000004
  81#define XFS_SB_VERSION2_ATTR2BIT        0x00000008      /* Inline attr rework */
  82
  83#define XFS_SB_VERSION2_OKREALFBITS     \
  84        (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
  85         XFS_SB_VERSION2_ATTR2BIT)
  86#define XFS_SB_VERSION2_OKSASHFBITS     \
  87        (0)
  88#define XFS_SB_VERSION2_OKREALBITS      \
  89        (XFS_SB_VERSION2_OKREALFBITS |  \
  90         XFS_SB_VERSION2_OKSASHFBITS )
  91
  92/*
  93 * Superblock - in core version.  Must match the ondisk version below.
  94 * Must be padded to 64 bit alignment.
  95 */
  96typedef struct xfs_sb {
  97        __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
  98        __uint32_t      sb_blocksize;   /* logical block size, bytes */
  99        xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
 100        xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
 101        xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 102        uuid_t          sb_uuid;        /* file system unique id */
 103        xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 104        xfs_ino_t       sb_rootino;     /* root inode number */
 105        xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 106        xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 107        xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 108        xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 109        xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 110        xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 111        xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 112        __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 113        __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 114        __uint16_t      sb_inodesize;   /* inode size, bytes */
 115        __uint16_t      sb_inopblock;   /* inodes per block */
 116        char            sb_fname[12];   /* file system name */
 117        __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 118        __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 119        __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 120        __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 121        __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 122        __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 123        __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 124        __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 125                                        /* statistics */
 126        /*
 127         * These fields must remain contiguous.  If you really
 128         * want to change their layout, make sure you fix the
 129         * code in xfs_trans_apply_sb_deltas().
 130         */
 131        __uint64_t      sb_icount;      /* allocated inodes */
 132        __uint64_t      sb_ifree;       /* free inodes */
 133        __uint64_t      sb_fdblocks;    /* free data blocks */
 134        __uint64_t      sb_frextents;   /* free realtime extents */
 135        /*
 136         * End contiguous fields.
 137         */
 138        xfs_ino_t       sb_uquotino;    /* user quota inode */
 139        xfs_ino_t       sb_gquotino;    /* group quota inode */
 140        __uint16_t      sb_qflags;      /* quota flags */
 141        __uint8_t       sb_flags;       /* misc. flags */
 142        __uint8_t       sb_shared_vn;   /* shared version number */
 143        xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 144        __uint32_t      sb_unit;        /* stripe or raid unit */
 145        __uint32_t      sb_width;       /* stripe or raid width */
 146        __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 147        __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 148        __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 149        __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 150        __uint32_t      sb_features2;   /* additional feature bits */
 151
 152        /*
 153         * bad features2 field as a result of failing to pad the sb
 154         * structure to 64 bits. Some machines will be using this field
 155         * for features2 bits. Easiest just to mark it bad and not use
 156         * it for anything else.
 157         */
 158        __uint32_t      sb_bad_features2;
 159
 160        /* must be padded to 64 bit alignment */
 161} xfs_sb_t;
 162
 163/*
 164 * Superblock - on disk version.  Must match the in core version above.
 165 * Must be padded to 64 bit alignment.
 166 */
 167typedef struct xfs_dsb {
 168        __be32          sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 169        __be32          sb_blocksize;   /* logical block size, bytes */
 170        __be64          sb_dblocks;     /* number of data blocks */
 171        __be64          sb_rblocks;     /* number of realtime blocks */
 172        __be64          sb_rextents;    /* number of realtime extents */
 173        uuid_t          sb_uuid;        /* file system unique id */
 174        __be64          sb_logstart;    /* starting block of log if internal */
 175        __be64          sb_rootino;     /* root inode number */
 176        __be64          sb_rbmino;      /* bitmap inode for realtime extents */
 177        __be64          sb_rsumino;     /* summary inode for rt bitmap */
 178        __be32          sb_rextsize;    /* realtime extent size, blocks */
 179        __be32          sb_agblocks;    /* size of an allocation group */
 180        __be32          sb_agcount;     /* number of allocation groups */
 181        __be32          sb_rbmblocks;   /* number of rt bitmap blocks */
 182        __be32          sb_logblocks;   /* number of log blocks */
 183        __be16          sb_versionnum;  /* header version == XFS_SB_VERSION */
 184        __be16          sb_sectsize;    /* volume sector size, bytes */
 185        __be16          sb_inodesize;   /* inode size, bytes */
 186        __be16          sb_inopblock;   /* inodes per block */
 187        char            sb_fname[12];   /* file system name */
 188        __u8            sb_blocklog;    /* log2 of sb_blocksize */
 189        __u8            sb_sectlog;     /* log2 of sb_sectsize */
 190        __u8            sb_inodelog;    /* log2 of sb_inodesize */
 191        __u8            sb_inopblog;    /* log2 of sb_inopblock */
 192        __u8            sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 193        __u8            sb_rextslog;    /* log2 of sb_rextents */
 194        __u8            sb_inprogress;  /* mkfs is in progress, don't mount */
 195        __u8            sb_imax_pct;    /* max % of fs for inode space */
 196                                        /* statistics */
 197        /*
 198         * These fields must remain contiguous.  If you really
 199         * want to change their layout, make sure you fix the
 200         * code in xfs_trans_apply_sb_deltas().
 201         */
 202        __be64          sb_icount;      /* allocated inodes */
 203        __be64          sb_ifree;       /* free inodes */
 204        __be64          sb_fdblocks;    /* free data blocks */
 205        __be64          sb_frextents;   /* free realtime extents */
 206        /*
 207         * End contiguous fields.
 208         */
 209        __be64          sb_uquotino;    /* user quota inode */
 210        __be64          sb_gquotino;    /* group quota inode */
 211        __be16          sb_qflags;      /* quota flags */
 212        __u8            sb_flags;       /* misc. flags */
 213        __u8            sb_shared_vn;   /* shared version number */
 214        __be32          sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 215        __be32          sb_unit;        /* stripe or raid unit */
 216        __be32          sb_width;       /* stripe or raid width */
 217        __u8            sb_dirblklog;   /* log2 of dir block size (fsbs) */
 218        __u8            sb_logsectlog;  /* log2 of the log sector size */
 219        __be16          sb_logsectsize; /* sector size for the log, bytes */
 220        __be32          sb_logsunit;    /* stripe unit size for the log */
 221        __be32          sb_features2;   /* additional feature bits */
 222        /*
 223         * bad features2 field as a result of failing to pad the sb
 224         * structure to 64 bits. Some machines will be using this field
 225         * for features2 bits. Easiest just to mark it bad and not use
 226         * it for anything else.
 227         */
 228        __be32  sb_bad_features2;
 229
 230        /* must be padded to 64 bit alignment */
 231} xfs_dsb_t;
 232
 233/*
 234 * Sequence number values for the fields.
 235 */
 236typedef enum {
 237        XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 238        XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 239        XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 240        XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 241        XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 242        XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 243        XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 244        XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 245        XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 246        XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 247        XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 248        XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 249        XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
 250        XFS_SBS_FIELDCOUNT
 251} xfs_sb_field_t;
 252
 253/*
 254 * Mask values, defined based on the xfs_sb_field_t values.
 255 * Only define the ones we're using.
 256 */
 257#define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 258#define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 259#define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 260#define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 261#define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 262#define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 263#define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 264#define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 265#define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 266#define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 267#define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 268#define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 269#define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 270#define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 271#define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 272#define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 273#define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 274#define XFS_SB_BAD_FEATURES2    XFS_SB_MVAL(BAD_FEATURES2)
 275#define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 276#define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 277#define XFS_SB_MOD_BITS         \
 278        (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 279         XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 280         XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 281         XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
 282         XFS_SB_BAD_FEATURES2)
 283
 284
 285/*
 286 * Misc. Flags - warning - these will be cleared by xfs_repair unless
 287 * a feature bit is set when the flag is used.
 288 */
 289#define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 290#define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 291
 292/*
 293 * define max. shared version we can interoperate with
 294 */
 295#define XFS_SB_MAX_SHARED_VN    0
 296
 297#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 298
 299#ifdef __KERNEL__
 300static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 301{
 302        return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 303                  (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 304                   ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 305                    !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 306                      ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 307                       (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 308                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 309}
 310#else
 311static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 312{
 313        return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 314                  (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 315                   ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 316                    !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 317                      ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 318                       (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 319                  (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 320                   (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 321}
 322#endif /* __KERNEL__ */
 323
 324/*
 325 * Detect a mismatched features2 field.  Older kernels read/wrote
 326 * this into the wrong slot, so to be safe we keep them in sync.
 327 */
 328static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
 329{
 330        return (sbp->sb_bad_features2 != sbp->sb_features2);
 331}
 332
 333static inline unsigned xfs_sb_version_tonew(unsigned v)
 334{
 335        return ((((v) == XFS_SB_VERSION_1) ? \
 336                0 : \
 337                (((v) == XFS_SB_VERSION_2) ? \
 338                        XFS_SB_VERSION_ATTRBIT : \
 339                        (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 340                XFS_SB_VERSION_4);
 341}
 342
 343static inline unsigned xfs_sb_version_toold(unsigned v)
 344{
 345        return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 346                0 : \
 347                (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 348                        XFS_SB_VERSION_3 : \
 349                        (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 350                                XFS_SB_VERSION_2 : \
 351                                XFS_SB_VERSION_1)));
 352}
 353
 354static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 355{
 356        return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 357                 ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 358                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 359                  ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 360}
 361
 362static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 363{
 364        (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 365                XFS_SB_VERSION_2 : \
 366                ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 367                        ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 368                        (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 369}
 370
 371static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 372{
 373        return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 374                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 375                  ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 376}
 377
 378static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 379{
 380        (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 381                XFS_SB_VERSION_3 : \
 382                ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 383}
 384
 385static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 386{
 387        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 388                ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 389}
 390
 391static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 392{
 393        (sbp)->sb_versionnum = \
 394                 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 395                        ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 396                        (xfs_sb_version_tonew((sbp)->sb_versionnum) | \
 397                         XFS_SB_VERSION_QUOTABIT));
 398}
 399
 400static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 401{
 402        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 403                ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 404}
 405
 406static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 407{
 408        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 409                ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 410}
 411
 412static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 413{
 414        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 415                ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 416}
 417
 418static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 419{
 420        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 421                ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 422}
 423
 424static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 425{
 426        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 427                ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 428}
 429
 430static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 431{
 432        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 433                ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 434}
 435
 436static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 437{
 438        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 439                ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 440}
 441
 442static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
 443{
 444        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 445                (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
 446}
 447
 448static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 449{
 450        return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 451                ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 452}
 453
 454/*
 455 * sb_features2 bit version macros.
 456 *
 457 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 458 *
 459 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 460 *      ((xfs_sb_version_hasmorebits(sbp) &&
 461 *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 462 */
 463
 464static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 465{
 466        return (xfs_sb_version_hasmorebits(sbp) &&      \
 467                ((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
 468}
 469
 470static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 471{
 472        return (xfs_sb_version_hasmorebits(sbp)) &&     \
 473                ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 474}
 475
 476static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 477{
 478        ((sbp)->sb_versionnum = \
 479                ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 480        ((sbp)->sb_features2 =  \
 481                ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 482}
 483
 484static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
 485{
 486        sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
 487        if (!sbp->sb_features2)
 488                sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
 489}
 490
 491/*
 492 * end of superblock version macros
 493 */
 494
 495#define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 496#define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 497#define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)XFS_BUF_PTR(bp))
 498
 499#define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 500#define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 501                        XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 502#define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 503                        XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 504
 505/*
 506 * File system sector to basic block conversions.
 507 */
 508#define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 509
 510/*
 511 * File system block to basic block conversions.
 512 */
 513#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 514#define XFS_BB_TO_FSB(mp,bb)    \
 515        (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 516#define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 517#define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 518
 519/*
 520 * File system block to byte conversions.
 521 */
 522#define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 523#define XFS_B_TO_FSB(mp,b)      \
 524        ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 525#define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 526#define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 527
 528#endif  /* __XFS_SB_H__ */
 529