linux/fs/xfs/xfs_sb.h
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   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#define XFS_SB_VERSION2_PARENTBIT       0x00000010      /* parent pointers */
  83#define XFS_SB_VERSION2_PROJID32BIT     0x00000080      /* 32 bit project id */
  84#define XFS_SB_VERSION2_CRCBIT          0x00000100      /* metadata CRCs */
  85
  86#define XFS_SB_VERSION2_OKREALFBITS     \
  87        (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
  88         XFS_SB_VERSION2_ATTR2BIT       | \
  89         XFS_SB_VERSION2_PROJID32BIT)
  90#define XFS_SB_VERSION2_OKSASHFBITS     \
  91        (0)
  92#define XFS_SB_VERSION2_OKREALBITS      \
  93        (XFS_SB_VERSION2_OKREALFBITS |  \
  94         XFS_SB_VERSION2_OKSASHFBITS )
  95
  96/*
  97 * Superblock - in core version.  Must match the ondisk version below.
  98 * Must be padded to 64 bit alignment.
  99 */
 100typedef struct xfs_sb {
 101        __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 102        __uint32_t      sb_blocksize;   /* logical block size, bytes */
 103        xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
 104        xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
 105        xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 106        uuid_t          sb_uuid;        /* file system unique id */
 107        xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 108        xfs_ino_t       sb_rootino;     /* root inode number */
 109        xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 110        xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 111        xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 112        xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 113        xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 114        xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 115        xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 116        __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 117        __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 118        __uint16_t      sb_inodesize;   /* inode size, bytes */
 119        __uint16_t      sb_inopblock;   /* inodes per block */
 120        char            sb_fname[12];   /* file system name */
 121        __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 122        __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 123        __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 124        __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 125        __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 126        __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 127        __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 128        __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 129                                        /* statistics */
 130        /*
 131         * These fields must remain contiguous.  If you really
 132         * want to change their layout, make sure you fix the
 133         * code in xfs_trans_apply_sb_deltas().
 134         */
 135        __uint64_t      sb_icount;      /* allocated inodes */
 136        __uint64_t      sb_ifree;       /* free inodes */
 137        __uint64_t      sb_fdblocks;    /* free data blocks */
 138        __uint64_t      sb_frextents;   /* free realtime extents */
 139        /*
 140         * End contiguous fields.
 141         */
 142        xfs_ino_t       sb_uquotino;    /* user quota inode */
 143        xfs_ino_t       sb_gquotino;    /* group quota inode */
 144        __uint16_t      sb_qflags;      /* quota flags */
 145        __uint8_t       sb_flags;       /* misc. flags */
 146        __uint8_t       sb_shared_vn;   /* shared version number */
 147        xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 148        __uint32_t      sb_unit;        /* stripe or raid unit */
 149        __uint32_t      sb_width;       /* stripe or raid width */
 150        __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 151        __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 152        __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 153        __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 154        __uint32_t      sb_features2;   /* additional feature bits */
 155
 156        /*
 157         * bad features2 field as a result of failing to pad the sb
 158         * structure to 64 bits. Some machines will be using this field
 159         * for features2 bits. Easiest just to mark it bad and not use
 160         * it for anything else.
 161         */
 162        __uint32_t      sb_bad_features2;
 163
 164        /* must be padded to 64 bit alignment */
 165} xfs_sb_t;
 166
 167/*
 168 * Superblock - on disk version.  Must match the in core version above.
 169 * Must be padded to 64 bit alignment.
 170 */
 171typedef struct xfs_dsb {
 172        __be32          sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 173        __be32          sb_blocksize;   /* logical block size, bytes */
 174        __be64          sb_dblocks;     /* number of data blocks */
 175        __be64          sb_rblocks;     /* number of realtime blocks */
 176        __be64          sb_rextents;    /* number of realtime extents */
 177        uuid_t          sb_uuid;        /* file system unique id */
 178        __be64          sb_logstart;    /* starting block of log if internal */
 179        __be64          sb_rootino;     /* root inode number */
 180        __be64          sb_rbmino;      /* bitmap inode for realtime extents */
 181        __be64          sb_rsumino;     /* summary inode for rt bitmap */
 182        __be32          sb_rextsize;    /* realtime extent size, blocks */
 183        __be32          sb_agblocks;    /* size of an allocation group */
 184        __be32          sb_agcount;     /* number of allocation groups */
 185        __be32          sb_rbmblocks;   /* number of rt bitmap blocks */
 186        __be32          sb_logblocks;   /* number of log blocks */
 187        __be16          sb_versionnum;  /* header version == XFS_SB_VERSION */
 188        __be16          sb_sectsize;    /* volume sector size, bytes */
 189        __be16          sb_inodesize;   /* inode size, bytes */
 190        __be16          sb_inopblock;   /* inodes per block */
 191        char            sb_fname[12];   /* file system name */
 192        __u8            sb_blocklog;    /* log2 of sb_blocksize */
 193        __u8            sb_sectlog;     /* log2 of sb_sectsize */
 194        __u8            sb_inodelog;    /* log2 of sb_inodesize */
 195        __u8            sb_inopblog;    /* log2 of sb_inopblock */
 196        __u8            sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 197        __u8            sb_rextslog;    /* log2 of sb_rextents */
 198        __u8            sb_inprogress;  /* mkfs is in progress, don't mount */
 199        __u8            sb_imax_pct;    /* max % of fs for inode space */
 200                                        /* statistics */
 201        /*
 202         * These fields must remain contiguous.  If you really
 203         * want to change their layout, make sure you fix the
 204         * code in xfs_trans_apply_sb_deltas().
 205         */
 206        __be64          sb_icount;      /* allocated inodes */
 207        __be64          sb_ifree;       /* free inodes */
 208        __be64          sb_fdblocks;    /* free data blocks */
 209        __be64          sb_frextents;   /* free realtime extents */
 210        /*
 211         * End contiguous fields.
 212         */
 213        __be64          sb_uquotino;    /* user quota inode */
 214        __be64          sb_gquotino;    /* group quota inode */
 215        __be16          sb_qflags;      /* quota flags */
 216        __u8            sb_flags;       /* misc. flags */
 217        __u8            sb_shared_vn;   /* shared version number */
 218        __be32          sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 219        __be32          sb_unit;        /* stripe or raid unit */
 220        __be32          sb_width;       /* stripe or raid width */
 221        __u8            sb_dirblklog;   /* log2 of dir block size (fsbs) */
 222        __u8            sb_logsectlog;  /* log2 of the log sector size */
 223        __be16          sb_logsectsize; /* sector size for the log, bytes */
 224        __be32          sb_logsunit;    /* stripe unit size for the log */
 225        __be32          sb_features2;   /* additional feature bits */
 226        /*
 227         * bad features2 field as a result of failing to pad the sb
 228         * structure to 64 bits. Some machines will be using this field
 229         * for features2 bits. Easiest just to mark it bad and not use
 230         * it for anything else.
 231         */
 232        __be32  sb_bad_features2;
 233
 234        /* must be padded to 64 bit alignment */
 235} xfs_dsb_t;
 236
 237/*
 238 * Sequence number values for the fields.
 239 */
 240typedef enum {
 241        XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 242        XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 243        XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 244        XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 245        XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 246        XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 247        XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 248        XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 249        XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 250        XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 251        XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 252        XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 253        XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
 254        XFS_SBS_FIELDCOUNT
 255} xfs_sb_field_t;
 256
 257/*
 258 * Mask values, defined based on the xfs_sb_field_t values.
 259 * Only define the ones we're using.
 260 */
 261#define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 262#define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 263#define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 264#define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 265#define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 266#define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 267#define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 268#define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 269#define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 270#define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 271#define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 272#define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 273#define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 274#define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 275#define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 276#define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 277#define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 278#define XFS_SB_BAD_FEATURES2    XFS_SB_MVAL(BAD_FEATURES2)
 279#define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 280#define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 281#define XFS_SB_MOD_BITS         \
 282        (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 283         XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 284         XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 285         XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
 286         XFS_SB_BAD_FEATURES2)
 287
 288
 289/*
 290 * Misc. Flags - warning - these will be cleared by xfs_repair unless
 291 * a feature bit is set when the flag is used.
 292 */
 293#define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 294#define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 295
 296/*
 297 * define max. shared version we can interoperate with
 298 */
 299#define XFS_SB_MAX_SHARED_VN    0
 300
 301#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 302
 303static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 304{
 305        /* We always support version 1-3 */
 306        if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
 307            sbp->sb_versionnum <= XFS_SB_VERSION_3)
 308                return 1;
 309
 310        /* We support version 4 if all feature bits are supported */
 311        if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
 312                if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
 313                    ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
 314                     (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
 315                        return 0;
 316
 317#ifdef __KERNEL__
 318                if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 319                        return 0;
 320#else
 321                if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) &&
 322                    sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 323                        return 0;
 324#endif
 325
 326                return 1;
 327        }
 328
 329        return 0;
 330}
 331
 332/*
 333 * Detect a mismatched features2 field.  Older kernels read/wrote
 334 * this into the wrong slot, so to be safe we keep them in sync.
 335 */
 336static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
 337{
 338        return (sbp->sb_bad_features2 != sbp->sb_features2);
 339}
 340
 341static inline unsigned xfs_sb_version_tonew(unsigned v)
 342{
 343        if (v == XFS_SB_VERSION_1)
 344                return XFS_SB_VERSION_4;
 345
 346        if (v == XFS_SB_VERSION_2)
 347                return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 348
 349        return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
 350                XFS_SB_VERSION_NLINKBIT;
 351}
 352
 353static inline unsigned xfs_sb_version_toold(unsigned v)
 354{
 355        if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
 356                return 0;
 357        if (v & XFS_SB_VERSION_NLINKBIT)
 358                return XFS_SB_VERSION_3;
 359        if (v & XFS_SB_VERSION_ATTRBIT)
 360                return XFS_SB_VERSION_2;
 361        return XFS_SB_VERSION_1;
 362}
 363
 364static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 365{
 366        return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
 367                sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 368                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 369                 (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 370}
 371
 372static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 373{
 374        if (sbp->sb_versionnum == XFS_SB_VERSION_1)
 375                sbp->sb_versionnum = XFS_SB_VERSION_2;
 376        else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
 377                sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
 378        else
 379                sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 380}
 381
 382static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 383{
 384        return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 385                 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 386                  (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 387}
 388
 389static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 390{
 391        if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
 392                sbp->sb_versionnum = XFS_SB_VERSION_3;
 393        else
 394                sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
 395}
 396
 397static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 398{
 399        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 400                (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 401}
 402
 403static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 404{
 405        if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
 406                sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
 407        else
 408                sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
 409                                        XFS_SB_VERSION_QUOTABIT;
 410}
 411
 412static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 413{
 414        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 415                (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 416}
 417
 418static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 419{
 420        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 421                (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 422}
 423
 424static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 425{
 426        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 427                (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 428}
 429
 430static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 431{
 432        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 433                (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 434}
 435
 436static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 437{
 438        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 439                (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 440}
 441
 442static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 443{
 444        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 445                (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 446}
 447
 448static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 449{
 450        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 451                (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 452}
 453
 454static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
 455{
 456        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 457                (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
 458}
 459
 460static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 461{
 462        return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 463                (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 464}
 465
 466/*
 467 * sb_features2 bit version macros.
 468 *
 469 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 470 *
 471 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 472 *      ((xfs_sb_version_hasmorebits(sbp) &&
 473 *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 474 */
 475
 476static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 477{
 478        return xfs_sb_version_hasmorebits(sbp) &&
 479                (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT);
 480}
 481
 482static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 483{
 484        return xfs_sb_version_hasmorebits(sbp) &&
 485                (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 486}
 487
 488static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 489{
 490        sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
 491        sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
 492}
 493
 494static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
 495{
 496        sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
 497        if (!sbp->sb_features2)
 498                sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
 499}
 500
 501static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
 502{
 503        return xfs_sb_version_hasmorebits(sbp) &&
 504                (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT);
 505}
 506
 507static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
 508{
 509        return (xfs_sb_version_hasmorebits(sbp) &&
 510                (sbp->sb_features2 & XFS_SB_VERSION2_CRCBIT));
 511}
 512
 513/*
 514 * end of superblock version macros
 515 */
 516
 517#define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 518#define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 519#define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)((bp)->b_addr))
 520
 521#define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 522#define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 523                        xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
 524#define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 525                        XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 526
 527/*
 528 * File system sector to basic block conversions.
 529 */
 530#define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 531
 532/*
 533 * File system block to basic block conversions.
 534 */
 535#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 536#define XFS_BB_TO_FSB(mp,bb)    \
 537        (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 538#define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 539
 540/*
 541 * File system block to byte conversions.
 542 */
 543#define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 544#define XFS_B_TO_FSB(mp,b)      \
 545        ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 546#define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 547#define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 548
 549#endif  /* __XFS_SB_H__ */
 550
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