git.oblomov.eu Git - linux-2.6/blob - 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_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 typedef struct xfs_sb
  91 {
  92         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
  93         __uint32_t      sb_blocksize;   /* logical block size, bytes */
  94         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
  95         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
  96         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
  97         uuid_t          sb_uuid;        /* file system unique id */
  98         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
  99         xfs_ino_t       sb_rootino;     /* root inode number */
 100         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 101         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 102         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 103         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 104         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 105         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 106         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 107         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 108         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 109         __uint16_t      sb_inodesize;   /* inode size, bytes */
 110         __uint16_t      sb_inopblock;   /* inodes per block */
 111         char            sb_fname[12];   /* file system name */
 112         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 113         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 114         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 115         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 116         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 117         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 118         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 119         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 120                                         /* statistics */
 121         /*
 122          * These fields must remain contiguous.  If you really
 123          * want to change their layout, make sure you fix the
 124          * code in xfs_trans_apply_sb_deltas().
 125          */
 126         __uint64_t      sb_icount;      /* allocated inodes */
 127         __uint64_t      sb_ifree;       /* free inodes */
 128         __uint64_t      sb_fdblocks;    /* free data blocks */
 129         __uint64_t      sb_frextents;   /* free realtime extents */
 130         /*
 131          * End contiguous fields.
 132          */
 133         xfs_ino_t       sb_uquotino;    /* user quota inode */
 134         xfs_ino_t       sb_gquotino;    /* group quota inode */
 135         __uint16_t      sb_qflags;      /* quota flags */
 136         __uint8_t       sb_flags;       /* misc. flags */
 137         __uint8_t       sb_shared_vn;   /* shared version number */
 138         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 139         __uint32_t      sb_unit;        /* stripe or raid unit */
 140         __uint32_t      sb_width;       /* stripe or raid width */
 141         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 142         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 143         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 144         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 145         __uint32_t      sb_features2;   /* additional feature bits */
 146 } xfs_sb_t;
 147
 148 /*
 149  * Sequence number values for the fields.
 150  */
 151 typedef enum {
 152         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 153         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 154         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 155         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 156         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 157         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 158         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 159         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 160         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 161         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 162         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 163         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 164         XFS_SBS_FEATURES2,
 165         XFS_SBS_FIELDCOUNT
 166 } xfs_sb_field_t;
 167
 168 /*
 169  * Mask values, defined based on the xfs_sb_field_t values.
 170  * Only define the ones we're using.
 171  */
 172 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 173 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 174 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 175 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 176 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 177 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 178 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 179 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 180 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 181 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 182 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 183 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 184 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 185 #define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 186 #define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 187 #define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 188 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 189 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 190 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 191 #define XFS_SB_MOD_BITS         \
 192         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 193          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 194          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 195          XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2)
 196
 197
 198 /*
 199  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 200  * a feature bit is set when the flag is used.
 201  */
 202 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 203 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 204
 205 /*
 206  * define max. shared version we can interoperate with
 207  */
 208 #define XFS_SB_MAX_SHARED_VN    0
 209
 210 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 211
 212 #define XFS_SB_GOOD_VERSION(sbp)        xfs_sb_good_version(sbp)
 213 #ifdef __KERNEL__
 214 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 215 {
 216         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 217                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 218                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 219                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 220                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 221                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 222                     (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 223 }
 224 #else
 225 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 226 {
 227         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 228                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 229                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 230                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 231                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 232                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 233                   (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 234                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 235 }
 236 #endif /* __KERNEL__ */
 237
 238 #define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
 239 static inline unsigned xfs_sb_version_tonew(unsigned v)
 240 {
 241         return ((((v) == XFS_SB_VERSION_1) ? \
 242                 0 : \
 243                 (((v) == XFS_SB_VERSION_2) ? \
 244                         XFS_SB_VERSION_ATTRBIT : \
 245                         (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 246                 XFS_SB_VERSION_4);
 247 }
 248
 249 #define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
 250 static inline unsigned xfs_sb_version_toold(unsigned v)
 251 {
 252         return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 253                 0 : \
 254                 (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 255                         XFS_SB_VERSION_3 : \
 256                         (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 257                                 XFS_SB_VERSION_2 : \
 258                                 XFS_SB_VERSION_1)));
 259 }
 260
 261 #define XFS_SB_VERSION_HASATTR(sbp)     xfs_sb_version_hasattr(sbp)
 262 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 263 {
 264         return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 265                  ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 266                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 267                   ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 268 }
 269
 270 #define XFS_SB_VERSION_ADDATTR(sbp)     xfs_sb_version_addattr(sbp)
 271 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 272 {
 273         (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 274                 XFS_SB_VERSION_2 : \
 275                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 276                         ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 277                         (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 278 }
 279
 280 #define XFS_SB_VERSION_HASNLINK(sbp)    xfs_sb_version_hasnlink(sbp)
 281 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 282 {
 283         return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 284                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 285                   ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 286 }
 287
 288 #define XFS_SB_VERSION_ADDNLINK(sbp)    xfs_sb_version_addnlink(sbp)
 289 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 290 {
 291         (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 292                 XFS_SB_VERSION_3 : \
 293                 ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 294 }
 295
 296 #define XFS_SB_VERSION_HASQUOTA(sbp)    xfs_sb_version_hasquota(sbp)
 297 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 298 {
 299         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 300                 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 301 }
 302
 303 #define XFS_SB_VERSION_ADDQUOTA(sbp)    xfs_sb_version_addquota(sbp)
 304 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 305 {
 306         (sbp)->sb_versionnum = \
 307                  (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 308                         ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 309                         (XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
 310                          XFS_SB_VERSION_QUOTABIT));
 311 }
 312
 313 #define XFS_SB_VERSION_HASALIGN(sbp)    xfs_sb_version_hasalign(sbp)
 314 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 315 {
 316         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 317                 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 318 }
 319
 320 #define XFS_SB_VERSION_SUBALIGN(sbp)    xfs_sb_version_subalign(sbp)
 321 static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
 322 {
 323         (sbp)->sb_versionnum = \
 324          XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
 325 }
 326
 327 #define XFS_SB_VERSION_HASDALIGN(sbp)   xfs_sb_version_hasdalign(sbp)
 328 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 329 {
 330         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 331                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 332 }
 333
 334 #define XFS_SB_VERSION_ADDDALIGN(sbp)   xfs_sb_version_adddalign(sbp)
 335 static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
 336 {
 337         return (sbp)->sb_versionnum = \
 338                 ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
 339 }
 340
 341 #define XFS_SB_VERSION_HASSHARED(sbp)   xfs_sb_version_hasshared(sbp)
 342 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 343 {
 344         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 345                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 346 }
 347
 348 #define XFS_SB_VERSION_ADDSHARED(sbp)   xfs_sb_version_addshared(sbp)
 349 static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
 350 {
 351         return (sbp)->sb_versionnum = \
 352                 ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
 353 }
 354
 355 #define XFS_SB_VERSION_SUBSHARED(sbp)   xfs_sb_version_subshared(sbp)
 356 static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
 357 {
 358         return (sbp)->sb_versionnum = \
 359                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
 360 }
 361
 362 #define XFS_SB_VERSION_HASDIRV2(sbp)    xfs_sb_version_hasdirv2(sbp)
 363 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 364 {
 365         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 366                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 367 }
 368
 369 #define XFS_SB_VERSION_HASLOGV2(sbp)   xfs_sb_version_haslogv2(sbp)
 370 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 371 {
 372         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 373                 ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 374 }
 375
 376 #define XFS_SB_VERSION_HASEXTFLGBIT(sbp)        xfs_sb_version_hasextflgbit(sbp)
 377 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 378 {
 379         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 380                 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 381 }
 382
 383 #define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)        xfs_sb_version_addextflgbit(sbp)
 384 static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
 385 {
 386         return (sbp)->sb_versionnum = \
 387                 ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
 388 }
 389
 390 #define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)        xfs_sb_version_subextflgbit(sbp)
 391 static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
 392 {
 393         return (sbp)->sb_versionnum = \
 394                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
 395 }
 396
 397 #define XFS_SB_VERSION_HASSECTOR(sbp)   xfs_sb_version_hassector(sbp)
 398 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 399 {
 400         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 401                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 402 }
 403
 404 #define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
 405 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 406 {
 407         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 408                 ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 409 }
 410
 411 /*
 412  * sb_features2 bit version macros.
 413  *
 414  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 415  *
 416  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 417  *      ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
 418  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 419  */
 420
 421 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 422 {
 423         return (XFS_SB_VERSION_HASMOREBITS(sbp) &&      \
 424                 ((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
 425 }
 426
 427 #define XFS_SB_VERSION_HASATTR2(sbp)    xfs_sb_version_hasattr2(sbp)
 428 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 429 {
 430         return (XFS_SB_VERSION_HASMOREBITS(sbp)) &&     \
 431                 ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 432 }
 433
 434 #define XFS_SB_VERSION_ADDATTR2(sbp)    xfs_sb_version_addattr2(sbp)
 435 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 436 {
 437         ((sbp)->sb_versionnum = \
 438                 ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 439         ((sbp)->sb_features2 =  \
 440                 ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 441 }
 442
 443 /*
 444  * end of superblock version macros
 445  */
 446
 447 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 448 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 449 #define XFS_BUF_TO_SBP(bp)      ((xfs_sb_t *)XFS_BUF_PTR(bp))
 450
 451 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 452 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 453                         XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 454 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 455                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 456
 457 /*
 458  * File system sector to basic block conversions.
 459  */
 460 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 461
 462 /*
 463  * File system block to basic block conversions.
 464  */
 465 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 466 #define XFS_BB_TO_FSB(mp,bb)    \
 467         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 468 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 469 #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 470
 471 /*
 472  * File system block to byte conversions.
 473  */
 474 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 475 #define XFS_B_TO_FSB(mp,b)      \
 476         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 477 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 478 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 479
 480 #endif  /* __XFS_SB_H__ */