fs/xfs/xfs_sb.h

   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
  27 struct xfs_buf;
  28 struct 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_RESERVED2BIT    0x00000002
  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_ATTR2BIT)
  83 #define XFS_SB_VERSION2_OKSASHFBITS     \
  84         (0)
  85 #define XFS_SB_VERSION2_OKREALBITS      \
  86         (XFS_SB_VERSION2_OKREALFBITS |  \
  87          XFS_SB_VERSION2_OKSASHFBITS )
  88
  89 typedef struct xfs_sb
  90 {
  91         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
  92         __uint32_t      sb_blocksize;   /* logical block size, bytes */
  93         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
  94         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
  95         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
  96         uuid_t          sb_uuid;        /* file system unique id */
  97         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
  98         xfs_ino_t       sb_rootino;     /* root inode number */
  99         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 100         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 101         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 102         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 103         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 104         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 105         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 106         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 107         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 108         __uint16_t      sb_inodesize;   /* inode size, bytes */
 109         __uint16_t      sb_inopblock;   /* inodes per block */
 110         char            sb_fname[12];   /* file system name */
 111         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 112         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 113         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 114         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 115         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 116         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 117         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 118         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 119                                         /* statistics */
 120         /*
 121          * These fields must remain contiguous.  If you really
 122          * want to change their layout, make sure you fix the
 123          * code in xfs_trans_apply_sb_deltas().
 124          */
 125         __uint64_t      sb_icount;      /* allocated inodes */
 126         __uint64_t      sb_ifree;       /* free inodes */
 127         __uint64_t      sb_fdblocks;    /* free data blocks */
 128         __uint64_t      sb_frextents;   /* free realtime extents */
 129         /*
 130          * End contiguous fields.
 131          */
 132         xfs_ino_t       sb_uquotino;    /* user quota inode */
 133         xfs_ino_t       sb_gquotino;    /* group quota inode */
 134         __uint16_t      sb_qflags;      /* quota flags */
 135         __uint8_t       sb_flags;       /* misc. flags */
 136         __uint8_t       sb_shared_vn;   /* shared version number */
 137         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 138         __uint32_t      sb_unit;        /* stripe or raid unit */
 139         __uint32_t      sb_width;       /* stripe or raid width */
 140         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 141         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 142         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 143         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 144         __uint32_t      sb_features2;   /* additional feature bits */
 145 } xfs_sb_t;
 146
 147 /*
 148  * Sequence number values for the fields.
 149  */
 150 typedef enum {
 151         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 152         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 153         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 154         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 155         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 156         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 157         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 158         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 159         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 160         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 161         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 162         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 163         XFS_SBS_FEATURES2,
 164         XFS_SBS_FIELDCOUNT
 165 } xfs_sb_field_t;
 166
 167 /*
 168  * Mask values, defined based on the xfs_sb_field_t values.
 169  * Only define the ones we're using.
 170  */
 171 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 172 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 173 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 174 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 175 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 176 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 177 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 178 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 179 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 180 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 181 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 182 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 183 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 184 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 185 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 186 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 187 #define XFS_SB_MOD_BITS         \
 188         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 189          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 190          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 191          XFS_SB_FEATURES2)
 192
 193
 194 /*
 195  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 196  * a feature bit is set when the flag is used.
 197  */
 198 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 199 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 200
 201 /*
 202  * define max. shared version we can interoperate with
 203  */
 204 #define XFS_SB_MAX_SHARED_VN    0
 205
 206 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 207
 208 #define XFS_SB_GOOD_VERSION(sbp)        xfs_sb_good_version(sbp)
 209 #ifdef __KERNEL__
 210 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 211 {
 212         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 213                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 214                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 215                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 216                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 217                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 218                     (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 219 }
 220 #else
 221 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 222 {
 223         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 224                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 225                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 226                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 227                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 228                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 229                   (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 230                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 231 }
 232 #endif /* __KERNEL__ */
 233
 234 #define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
 235 static inline unsigned xfs_sb_version_tonew(unsigned v)
 236 {
 237         return ((((v) == XFS_SB_VERSION_1) ? \
 238                 0 : \
 239                 (((v) == XFS_SB_VERSION_2) ? \
 240                         XFS_SB_VERSION_ATTRBIT : \
 241                         (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 242                 XFS_SB_VERSION_4);
 243 }
 244
 245 #define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
 246 static inline unsigned xfs_sb_version_toold(unsigned v)
 247 {
 248         return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 249                 0 : \
 250                 (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 251                         XFS_SB_VERSION_3 : \
 252                         (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 253                                 XFS_SB_VERSION_2 : \
 254                                 XFS_SB_VERSION_1)));
 255 }
 256
 257 #define XFS_SB_VERSION_HASATTR(sbp)     xfs_sb_version_hasattr(sbp)
 258 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 259 {
 260         return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 261                  ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 262                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 263                   ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 264 }
 265
 266 #define XFS_SB_VERSION_ADDATTR(sbp)     xfs_sb_version_addattr(sbp)
 267 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 268 {
 269         (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 270                 XFS_SB_VERSION_2 : \
 271                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 272                         ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 273                         (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 274 }
 275
 276 #define XFS_SB_VERSION_HASNLINK(sbp)    xfs_sb_version_hasnlink(sbp)
 277 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 278 {
 279         return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 280                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 281                   ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 282 }
 283
 284 #define XFS_SB_VERSION_ADDNLINK(sbp)    xfs_sb_version_addnlink(sbp)
 285 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 286 {
 287         (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 288                 XFS_SB_VERSION_3 : \
 289                 ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 290 }
 291
 292 #define XFS_SB_VERSION_HASQUOTA(sbp)    xfs_sb_version_hasquota(sbp)
 293 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 294 {
 295         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 296                 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 297 }
 298
 299 #define XFS_SB_VERSION_ADDQUOTA(sbp)    xfs_sb_version_addquota(sbp)
 300 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 301 {
 302         (sbp)->sb_versionnum = \
 303                  (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 304                         ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 305                         (XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
 306                          XFS_SB_VERSION_QUOTABIT));
 307 }
 308
 309 #define XFS_SB_VERSION_HASALIGN(sbp)    xfs_sb_version_hasalign(sbp)
 310 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 311 {
 312         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 313                 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 314 }
 315
 316 #define XFS_SB_VERSION_SUBALIGN(sbp)    xfs_sb_version_subalign(sbp)
 317 static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
 318 {
 319         (sbp)->sb_versionnum = \
 320          XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
 321 }
 322
 323 #define XFS_SB_VERSION_HASDALIGN(sbp)   xfs_sb_version_hasdalign(sbp)
 324 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 325 {
 326         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 327                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 328 }
 329
 330 #define XFS_SB_VERSION_ADDDALIGN(sbp)   xfs_sb_version_adddalign(sbp)
 331 static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
 332 {
 333         return (sbp)->sb_versionnum = \
 334                 ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
 335 }
 336
 337 #define XFS_SB_VERSION_HASSHARED(sbp)   xfs_sb_version_hasshared(sbp)
 338 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 339 {
 340         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 341                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 342 }
 343
 344 #define XFS_SB_VERSION_ADDSHARED(sbp)   xfs_sb_version_addshared(sbp)
 345 static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
 346 {
 347         return (sbp)->sb_versionnum = \
 348                 ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
 349 }
 350
 351 #define XFS_SB_VERSION_SUBSHARED(sbp)   xfs_sb_version_subshared(sbp)
 352 static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
 353 {
 354         return (sbp)->sb_versionnum = \
 355                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
 356 }
 357
 358 #define XFS_SB_VERSION_HASDIRV2(sbp)    xfs_sb_version_hasdirv2(sbp)
 359 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 360 {
 361         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 362                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 363 }
 364
 365 #define XFS_SB_VERSION_HASLOGV2(sbp)   xfs_sb_version_haslogv2(sbp)
 366 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 367 {
 368         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 369                 ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 370 }
 371
 372 #define XFS_SB_VERSION_HASEXTFLGBIT(sbp)        xfs_sb_version_hasextflgbit(sbp)
 373 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 374 {
 375         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 376                 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 377 }
 378
 379 #define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)        xfs_sb_version_addextflgbit(sbp)
 380 static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
 381 {
 382         return (sbp)->sb_versionnum = \
 383                 ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
 384 }
 385
 386 #define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)        xfs_sb_version_subextflgbit(sbp)
 387 static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
 388 {
 389         return (sbp)->sb_versionnum = \
 390                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
 391 }
 392
 393 #define XFS_SB_VERSION_HASSECTOR(sbp)   xfs_sb_version_hassector(sbp)
 394 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 395 {
 396         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 397                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 398 }
 399
 400 #define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
 401 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 402 {
 403         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 404                 ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 405 }
 406
 407 /*
 408  * sb_features2 bit version macros.
 409  *
 410  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 411  *
 412  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 413  *      ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
 414  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 415  */
 416
 417 #define XFS_SB_VERSION_HASATTR2(sbp)    xfs_sb_version_hasattr2(sbp)
 418 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 419 {
 420         return (XFS_SB_VERSION_HASMOREBITS(sbp)) &&     \
 421                 ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 422 }
 423
 424 #define XFS_SB_VERSION_ADDATTR2(sbp)    xfs_sb_version_addattr2(sbp)
 425 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 426 {
 427         ((sbp)->sb_versionnum = \
 428                 ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 429         ((sbp)->sb_features2 =  \
 430                 ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 431 }
 432
 433 /*
 434  * end of superblock version macros
 435  */
 436
 437 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 438 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 439 #define XFS_BUF_TO_SBP(bp)      ((xfs_sb_t *)XFS_BUF_PTR(bp))
 440
 441 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 442 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 443                         XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 444 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 445                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 446
 447 /*
 448  * File system sector to basic block conversions.
 449  */
 450 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 451
 452 /*
 453  * File system block to basic block conversions.
 454  */
 455 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 456 #define XFS_BB_TO_FSB(mp,bb)    \
 457         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 458 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 459 #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 460
 461 /*
 462  * File system block to byte conversions.
 463  */
 464 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 465 #define XFS_B_TO_FSB(mp,b)      \
 466         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 467 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 468 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 469
 470 #endif  /* __XFS_SB_H__ */