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_OKSASHBITS       \
  64         (XFS_SB_VERSION_NUMBITS | \
  65          XFS_SB_VERSION_REALFBITS | \
  66          XFS_SB_VERSION_OKSASHFBITS)
  67 #define XFS_SB_VERSION_OKREALBITS       \
  68         (XFS_SB_VERSION_NUMBITS | \
  69          XFS_SB_VERSION_OKREALFBITS | \
  70          XFS_SB_VERSION_OKSASHFBITS)
  71
  72 /*
  73  * There are two words to hold XFS "feature" bits: the original
  74  * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
  75  * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
  76  *
  77  * These defines represent bits in sb_features2.
  78  */
  79 #define XFS_SB_VERSION2_REALFBITS       0x00ffffff      /* Mask: features */
  80 #define XFS_SB_VERSION2_RESERVED1BIT    0x00000001
  81 #define XFS_SB_VERSION2_RESERVED2BIT    0x00000002
  82 #define XFS_SB_VERSION2_RESERVED4BIT    0x00000004
  83 #define XFS_SB_VERSION2_ATTR2BIT        0x00000008      /* Inline attr rework */
  84 #define XFS_SB_VERSION2_SASHFBITS       0xff000000      /* Mask: features that
  85                                                            require changing
  86                                                            PROM and SASH */
  87
  88 #define XFS_SB_VERSION2_OKREALFBITS     \
  89         (XFS_SB_VERSION2_ATTR2BIT)
  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 typedef struct xfs_sb
  97 {
  98         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
  99         __uint32_t      sb_blocksize;   /* logical block size, bytes */
 100         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
 101         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
 102         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 103         uuid_t          sb_uuid;        /* file system unique id */
 104         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 105         xfs_ino_t       sb_rootino;     /* root inode number */
 106         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 107         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 108         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 109         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 110         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 111         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 112         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 113         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 114         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 115         __uint16_t      sb_inodesize;   /* inode size, bytes */
 116         __uint16_t      sb_inopblock;   /* inodes per block */
 117         char            sb_fname[12];   /* file system name */
 118         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 119         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 120         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 121         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 122         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 123         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 124         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 125         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 126                                         /* statistics */
 127         /*
 128          * These fields must remain contiguous.  If you really
 129          * want to change their layout, make sure you fix the
 130          * code in xfs_trans_apply_sb_deltas().
 131          */
 132         __uint64_t      sb_icount;      /* allocated inodes */
 133         __uint64_t      sb_ifree;       /* free inodes */
 134         __uint64_t      sb_fdblocks;    /* free data blocks */
 135         __uint64_t      sb_frextents;   /* free realtime extents */
 136         /*
 137          * End contiguous fields.
 138          */
 139         xfs_ino_t       sb_uquotino;    /* user quota inode */
 140         xfs_ino_t       sb_gquotino;    /* group quota inode */
 141         __uint16_t      sb_qflags;      /* quota flags */
 142         __uint8_t       sb_flags;       /* misc. flags */
 143         __uint8_t       sb_shared_vn;   /* shared version number */
 144         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 145         __uint32_t      sb_unit;        /* stripe or raid unit */
 146         __uint32_t      sb_width;       /* stripe or raid width */
 147         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 148         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 149         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 150         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 151         __uint32_t      sb_features2;   /* additional feature bits */
 152 } xfs_sb_t;
 153
 154 /*
 155  * Sequence number values for the fields.
 156  */
 157 typedef enum {
 158         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 159         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 160         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 161         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 162         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 163         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 164         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 165         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 166         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 167         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 168         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 169         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 170         XFS_SBS_FEATURES2,
 171         XFS_SBS_FIELDCOUNT
 172 } xfs_sb_field_t;
 173
 174 /*
 175  * Mask values, defined based on the xfs_sb_field_t values.
 176  * Only define the ones we're using.
 177  */
 178 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 179 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 180 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 181 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 182 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 183 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 184 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 185 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 186 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 187 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 188 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 189 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 190 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 191 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 192 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 193 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 194 #define XFS_SB_MOD_BITS         \
 195         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 196          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 197          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 198          XFS_SB_FEATURES2)
 199
 200
 201 /*
 202  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 203  * a feature bit is set when the flag is used.
 204  */
 205 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 206 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 207
 208 /*
 209  * define max. shared version we can interoperate with
 210  */
 211 #define XFS_SB_MAX_SHARED_VN    0
 212
 213 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 214
 215 #define XFS_SB_GOOD_VERSION(sbp)        xfs_sb_good_version(sbp)
 216 #ifdef __KERNEL__
 217 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 218 {
 219         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 220                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 221                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 222                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 223                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 224                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 225                     (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 226 }
 227 #else
 228 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 229 {
 230         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 231                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 232                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 233                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 234                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 235                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 236                   (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 237                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 238 }
 239 #endif /* __KERNEL__ */
 240
 241 #define XFS_SB_GOOD_SASH_VERSION(sbp)   \
 242         ((((sbp)->sb_versionnum >= XFS_SB_VERSION_1) && \
 243           ((sbp)->sb_versionnum <= XFS_SB_VERSION_3)) || \
 244          ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 245           !((sbp)->sb_versionnum & ~XFS_SB_VERSION_OKSASHBITS)))
 246
 247 #define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
 248 static inline unsigned xfs_sb_version_tonew(unsigned v)
 249 {
 250         return ((((v) == XFS_SB_VERSION_1) ? \
 251                 0 : \
 252                 (((v) == XFS_SB_VERSION_2) ? \
 253                         XFS_SB_VERSION_ATTRBIT : \
 254                         (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 255                 XFS_SB_VERSION_4);
 256 }
 257
 258 #define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
 259 static inline unsigned xfs_sb_version_toold(unsigned v)
 260 {
 261         return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 262                 0 : \
 263                 (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 264                         XFS_SB_VERSION_3 : \
 265                         (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 266                                 XFS_SB_VERSION_2 : \
 267                                 XFS_SB_VERSION_1)));
 268 }
 269
 270 #define XFS_SB_VERSION_HASATTR(sbp)     xfs_sb_version_hasattr(sbp)
 271 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 272 {
 273         return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 274                  ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 275                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 276                   ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 277 }
 278
 279 #define XFS_SB_VERSION_ADDATTR(sbp)     xfs_sb_version_addattr(sbp)
 280 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 281 {
 282         (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 283                 XFS_SB_VERSION_2 : \
 284                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 285                         ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 286                         (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 287 }
 288
 289 #define XFS_SB_VERSION_HASNLINK(sbp)    xfs_sb_version_hasnlink(sbp)
 290 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 291 {
 292         return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 293                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 294                   ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 295 }
 296
 297 #define XFS_SB_VERSION_ADDNLINK(sbp)    xfs_sb_version_addnlink(sbp)
 298 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 299 {
 300         (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 301                 XFS_SB_VERSION_3 : \
 302                 ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 303 }
 304
 305 #define XFS_SB_VERSION_HASQUOTA(sbp)    xfs_sb_version_hasquota(sbp)
 306 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 307 {
 308         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 309                 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 310 }
 311
 312 #define XFS_SB_VERSION_ADDQUOTA(sbp)    xfs_sb_version_addquota(sbp)
 313 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 314 {
 315         (sbp)->sb_versionnum = \
 316                  (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 317                         ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 318                         (XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
 319                          XFS_SB_VERSION_QUOTABIT));
 320 }
 321
 322 #define XFS_SB_VERSION_HASALIGN(sbp)    xfs_sb_version_hasalign(sbp)
 323 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 324 {
 325         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 326                 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 327 }
 328
 329 #define XFS_SB_VERSION_SUBALIGN(sbp)    xfs_sb_version_subalign(sbp)
 330 static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
 331 {
 332         (sbp)->sb_versionnum = \
 333          XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
 334 }
 335
 336 #define XFS_SB_VERSION_HASDALIGN(sbp)   xfs_sb_version_hasdalign(sbp)
 337 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 338 {
 339         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 340                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 341 }
 342
 343 #define XFS_SB_VERSION_ADDDALIGN(sbp)   xfs_sb_version_adddalign(sbp)
 344 static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
 345 {
 346         return (sbp)->sb_versionnum = \
 347                 ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
 348 }
 349
 350 #define XFS_SB_VERSION_HASSHARED(sbp)   xfs_sb_version_hasshared(sbp)
 351 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 352 {
 353         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 354                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 355 }
 356
 357 #define XFS_SB_VERSION_ADDSHARED(sbp)   xfs_sb_version_addshared(sbp)
 358 static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
 359 {
 360         return (sbp)->sb_versionnum = \
 361                 ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
 362 }
 363
 364 #define XFS_SB_VERSION_SUBSHARED(sbp)   xfs_sb_version_subshared(sbp)
 365 static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
 366 {
 367         return (sbp)->sb_versionnum = \
 368                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
 369 }
 370
 371 #define XFS_SB_VERSION_HASDIRV2(sbp)    xfs_sb_version_hasdirv2(sbp)
 372 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 373 {
 374         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 375                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 376 }
 377
 378 #define XFS_SB_VERSION_HASLOGV2(sbp)   xfs_sb_version_haslogv2(sbp)
 379 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 380 {
 381         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 382                 ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 383 }
 384
 385 #define XFS_SB_VERSION_HASEXTFLGBIT(sbp)        xfs_sb_version_hasextflgbit(sbp)
 386 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 387 {
 388         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 389                 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 390 }
 391
 392 #define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)        xfs_sb_version_addextflgbit(sbp)
 393 static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
 394 {
 395         return (sbp)->sb_versionnum = \
 396                 ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
 397 }
 398
 399 #define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)        xfs_sb_version_subextflgbit(sbp)
 400 static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
 401 {
 402         return (sbp)->sb_versionnum = \
 403                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
 404 }
 405
 406 #define XFS_SB_VERSION_HASSECTOR(sbp)   xfs_sb_version_hassector(sbp)
 407 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 408 {
 409         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 410                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 411 }
 412
 413 #define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
 414 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 415 {
 416         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 417                 ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 418 }
 419
 420 /*
 421  * sb_features2 bit version macros.
 422  *
 423  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 424  *
 425  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 426  *      ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
 427  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 428  */
 429
 430 #define XFS_SB_VERSION_HASATTR2(sbp)    xfs_sb_version_hasattr2(sbp)
 431 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 432 {
 433         return (XFS_SB_VERSION_HASMOREBITS(sbp)) &&     \
 434                 ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 435 }
 436
 437 #define XFS_SB_VERSION_ADDATTR2(sbp)    xfs_sb_version_addattr2(sbp)
 438 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 439 {
 440         ((sbp)->sb_versionnum = \
 441                 ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 442         ((sbp)->sb_features2 =  \
 443                 ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 444 }
 445
 446 /*
 447  * end of superblock version macros
 448  */
 449
 450 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 451 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 452 #define XFS_BUF_TO_SBP(bp)      ((xfs_sb_t *)XFS_BUF_PTR(bp))
 453
 454 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 455 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 456                         XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 457 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 458                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 459
 460 /*
 461  * File system sector to basic block conversions.
 462  */
 463 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 464 #define XFS_BB_TO_FSS(mp,bb)    \
 465         (((bb) + (XFS_FSS_TO_BB(mp,1) - 1)) >> (mp)->m_sectbb_log)
 466 #define XFS_BB_TO_FSST(mp,bb)   ((bb) >> (mp)->m_sectbb_log)
 467
 468 /*
 469  * File system sector to byte conversions.
 470  */
 471 #define XFS_FSS_TO_B(mp,sectno) ((xfs_fsize_t)(sectno) << (mp)->m_sb.sb_sectlog)
 472 #define XFS_B_TO_FSST(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_sectlog)
 473
 474 /*
 475  * File system block to basic block conversions.
 476  */
 477 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 478 #define XFS_BB_TO_FSB(mp,bb)    \
 479         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 480 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 481 #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 482
 483 /*
 484  * File system block to byte conversions.
 485  */
 486 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 487 #define XFS_B_TO_FSB(mp,b)      \
 488         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 489 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 490 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 491
 492 #endif  /* __XFS_SB_H__ */