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 #define XFS_SB_VERSION_MKFS(ia,dia,extflag,dirv2,na,sflag,morebits)     \
  72         (((ia) || (dia) || (extflag) || (dirv2) || (na) || (sflag) || \
  73           (morebits)) ? \
  74                 (XFS_SB_VERSION_4 | \
  75                  ((ia) ? XFS_SB_VERSION_ALIGNBIT : 0) | \
  76                  ((dia) ? XFS_SB_VERSION_DALIGNBIT : 0) | \
  77                  ((extflag) ? XFS_SB_VERSION_EXTFLGBIT : 0) | \
  78                  ((dirv2) ? XFS_SB_VERSION_DIRV2BIT : 0) | \
  79                  ((na) ? XFS_SB_VERSION_LOGV2BIT : 0) | \
  80                  ((sflag) ? XFS_SB_VERSION_SECTORBIT : 0) | \
  81                  ((morebits) ? XFS_SB_VERSION_MOREBITSBIT : 0)) : \
  82                 XFS_SB_VERSION_1)
  83
  84 /*
  85  * There are two words to hold XFS "feature" bits: the original
  86  * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
  87  * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
  88  *
  89  * These defines represent bits in sb_features2.
  90  */
  91 #define XFS_SB_VERSION2_REALFBITS       0x00ffffff      /* Mask: features */
  92 #define XFS_SB_VERSION2_RESERVED1BIT    0x00000001
  93 #define XFS_SB_VERSION2_RESERVED2BIT    0x00000002
  94 #define XFS_SB_VERSION2_RESERVED4BIT    0x00000004
  95 #define XFS_SB_VERSION2_ATTR2BIT        0x00000008      /* Inline attr rework */
  96 #define XFS_SB_VERSION2_SASHFBITS       0xff000000      /* Mask: features that
  97                                                            require changing
  98                                                            PROM and SASH */
  99
 100 #define XFS_SB_VERSION2_OKREALFBITS     \
 101         (XFS_SB_VERSION2_ATTR2BIT)
 102 #define XFS_SB_VERSION2_OKSASHFBITS     \
 103         (0)
 104 #define XFS_SB_VERSION2_OKREALBITS      \
 105         (XFS_SB_VERSION2_OKREALFBITS |  \
 106          XFS_SB_VERSION2_OKSASHFBITS )
 107
 108 /*
 109  * mkfs macro to set up sb_features2 word
 110  */
 111 #define XFS_SB_VERSION2_MKFS(resvd1, sbcntr)    0
 112
 113 typedef struct xfs_sb
 114 {
 115         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 116         __uint32_t      sb_blocksize;   /* logical block size, bytes */
 117         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
 118         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
 119         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 120         uuid_t          sb_uuid;        /* file system unique id */
 121         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 122         xfs_ino_t       sb_rootino;     /* root inode number */
 123         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 124         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 125         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 126         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 127         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 128         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 129         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 130         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 131         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 132         __uint16_t      sb_inodesize;   /* inode size, bytes */
 133         __uint16_t      sb_inopblock;   /* inodes per block */
 134         char            sb_fname[12];   /* file system name */
 135         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 136         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 137         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 138         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 139         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 140         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 141         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 142         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 143                                         /* statistics */
 144         /*
 145          * These fields must remain contiguous.  If you really
 146          * want to change their layout, make sure you fix the
 147          * code in xfs_trans_apply_sb_deltas().
 148          */
 149         __uint64_t      sb_icount;      /* allocated inodes */
 150         __uint64_t      sb_ifree;       /* free inodes */
 151         __uint64_t      sb_fdblocks;    /* free data blocks */
 152         __uint64_t      sb_frextents;   /* free realtime extents */
 153         /*
 154          * End contiguous fields.
 155          */
 156         xfs_ino_t       sb_uquotino;    /* user quota inode */
 157         xfs_ino_t       sb_gquotino;    /* group quota inode */
 158         __uint16_t      sb_qflags;      /* quota flags */
 159         __uint8_t       sb_flags;       /* misc. flags */
 160         __uint8_t       sb_shared_vn;   /* shared version number */
 161         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 162         __uint32_t      sb_unit;        /* stripe or raid unit */
 163         __uint32_t      sb_width;       /* stripe or raid width */
 164         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 165         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 166         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 167         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 168         __uint32_t      sb_features2;   /* additional feature bits */
 169 } xfs_sb_t;
 170
 171 /*
 172  * Sequence number values for the fields.
 173  */
 174 typedef enum {
 175         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 176         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 177         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 178         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 179         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 180         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 181         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 182         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 183         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 184         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 185         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 186         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 187         XFS_SBS_FEATURES2,
 188         XFS_SBS_FIELDCOUNT
 189 } xfs_sb_field_t;
 190
 191 /*
 192  * Mask values, defined based on the xfs_sb_field_t values.
 193  * Only define the ones we're using.
 194  */
 195 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 196 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 197 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 198 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 199 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 200 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 201 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 202 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 203 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 204 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 205 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 206 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 207 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 208 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 209 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 210 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 211 #define XFS_SB_MOD_BITS         \
 212         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 213          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 214          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 215          XFS_SB_FEATURES2)
 216
 217
 218 /*
 219  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 220  * a feature bit is set when the flag is used.
 221  */
 222 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 223 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 224
 225 /*
 226  * define max. shared version we can interoperate with
 227  */
 228 #define XFS_SB_MAX_SHARED_VN    0
 229
 230 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 231
 232 #define XFS_SB_GOOD_VERSION(sbp)        xfs_sb_good_version(sbp)
 233 #ifdef __KERNEL__
 234 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 235 {
 236         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 237                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 238                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 239                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 240                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 241                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 242                     (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 243 }
 244 #else
 245 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 246 {
 247         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 248                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 249                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 250                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 251                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 252                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 253                   (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 254                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 255 }
 256 #endif /* __KERNEL__ */
 257
 258 #define XFS_SB_GOOD_SASH_VERSION(sbp)   \
 259         ((((sbp)->sb_versionnum >= XFS_SB_VERSION_1) && \
 260           ((sbp)->sb_versionnum <= XFS_SB_VERSION_3)) || \
 261          ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 262           !((sbp)->sb_versionnum & ~XFS_SB_VERSION_OKSASHBITS)))
 263
 264 #define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
 265 static inline unsigned xfs_sb_version_tonew(unsigned v)
 266 {
 267         return ((((v) == XFS_SB_VERSION_1) ? \
 268                 0 : \
 269                 (((v) == XFS_SB_VERSION_2) ? \
 270                         XFS_SB_VERSION_ATTRBIT : \
 271                         (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 272                 XFS_SB_VERSION_4);
 273 }
 274
 275 #define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
 276 static inline unsigned xfs_sb_version_toold(unsigned v)
 277 {
 278         return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 279                 0 : \
 280                 (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 281                         XFS_SB_VERSION_3 : \
 282                         (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 283                                 XFS_SB_VERSION_2 : \
 284                                 XFS_SB_VERSION_1)));
 285 }
 286
 287 #define XFS_SB_VERSION_HASATTR(sbp)     xfs_sb_version_hasattr(sbp)
 288 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 289 {
 290         return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 291                  ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 292                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 293                   ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 294 }
 295
 296 #define XFS_SB_VERSION_ADDATTR(sbp)     xfs_sb_version_addattr(sbp)
 297 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 298 {
 299         (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 300                 XFS_SB_VERSION_2 : \
 301                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 302                         ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 303                         (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 304 }
 305
 306 #define XFS_SB_VERSION_HASNLINK(sbp)    xfs_sb_version_hasnlink(sbp)
 307 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 308 {
 309         return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 310                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 311                   ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 312 }
 313
 314 #define XFS_SB_VERSION_ADDNLINK(sbp)    xfs_sb_version_addnlink(sbp)
 315 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 316 {
 317         (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 318                 XFS_SB_VERSION_3 : \
 319                 ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 320 }
 321
 322 #define XFS_SB_VERSION_HASQUOTA(sbp)    xfs_sb_version_hasquota(sbp)
 323 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 324 {
 325         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 326                 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 327 }
 328
 329 #define XFS_SB_VERSION_ADDQUOTA(sbp)    xfs_sb_version_addquota(sbp)
 330 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 331 {
 332         (sbp)->sb_versionnum = \
 333                  (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 334                         ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 335                         (XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
 336                          XFS_SB_VERSION_QUOTABIT));
 337 }
 338
 339 #define XFS_SB_VERSION_HASALIGN(sbp)    xfs_sb_version_hasalign(sbp)
 340 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 341 {
 342         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 343                 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 344 }
 345
 346 #define XFS_SB_VERSION_SUBALIGN(sbp)    xfs_sb_version_subalign(sbp)
 347 static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
 348 {
 349         (sbp)->sb_versionnum = \
 350          XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
 351 }
 352
 353 #define XFS_SB_VERSION_HASDALIGN(sbp)   xfs_sb_version_hasdalign(sbp)
 354 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 355 {
 356         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 357                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 358 }
 359
 360 #define XFS_SB_VERSION_ADDDALIGN(sbp)   xfs_sb_version_adddalign(sbp)
 361 static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
 362 {
 363         return (sbp)->sb_versionnum = \
 364                 ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
 365 }
 366
 367 #define XFS_SB_VERSION_HASSHARED(sbp)   xfs_sb_version_hasshared(sbp)
 368 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 369 {
 370         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 371                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 372 }
 373
 374 #define XFS_SB_VERSION_ADDSHARED(sbp)   xfs_sb_version_addshared(sbp)
 375 static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
 376 {
 377         return (sbp)->sb_versionnum = \
 378                 ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
 379 }
 380
 381 #define XFS_SB_VERSION_SUBSHARED(sbp)   xfs_sb_version_subshared(sbp)
 382 static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
 383 {
 384         return (sbp)->sb_versionnum = \
 385                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
 386 }
 387
 388 #define XFS_SB_VERSION_HASDIRV2(sbp)    xfs_sb_version_hasdirv2(sbp)
 389 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 390 {
 391         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 392                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 393 }
 394
 395 #define XFS_SB_VERSION_HASLOGV2(sbp)   xfs_sb_version_haslogv2(sbp)
 396 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 397 {
 398         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 399                 ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 400 }
 401
 402 #define XFS_SB_VERSION_HASEXTFLGBIT(sbp)        xfs_sb_version_hasextflgbit(sbp)
 403 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 404 {
 405         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 406                 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 407 }
 408
 409 #define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)        xfs_sb_version_addextflgbit(sbp)
 410 static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
 411 {
 412         return (sbp)->sb_versionnum = \
 413                 ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
 414 }
 415
 416 #define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)        xfs_sb_version_subextflgbit(sbp)
 417 static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
 418 {
 419         return (sbp)->sb_versionnum = \
 420                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
 421 }
 422
 423 #define XFS_SB_VERSION_HASSECTOR(sbp)   xfs_sb_version_hassector(sbp)
 424 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 425 {
 426         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 427                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 428 }
 429
 430 #define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
 431 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 432 {
 433         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 434                 ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 435 }
 436
 437 /*
 438  * sb_features2 bit version macros.
 439  *
 440  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 441  *
 442  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 443  *      ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
 444  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 445  */
 446
 447 #define XFS_SB_VERSION_HASATTR2(sbp)    xfs_sb_version_hasattr2(sbp)
 448 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 449 {
 450         return (XFS_SB_VERSION_HASMOREBITS(sbp)) &&     \
 451                 ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 452 }
 453
 454 #define XFS_SB_VERSION_ADDATTR2(sbp)    xfs_sb_version_addattr2(sbp)
 455 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 456 {
 457         ((sbp)->sb_versionnum = \
 458                 ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 459         ((sbp)->sb_features2 =  \
 460                 ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 461 }
 462
 463 /*
 464  * end of superblock version macros
 465  */
 466
 467 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 468 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 469 #define XFS_BUF_TO_SBP(bp)      ((xfs_sb_t *)XFS_BUF_PTR(bp))
 470
 471 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 472 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 473                         XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 474 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 475                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 476
 477 /*
 478  * File system sector to basic block conversions.
 479  */
 480 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 481 #define XFS_BB_TO_FSS(mp,bb)    \
 482         (((bb) + (XFS_FSS_TO_BB(mp,1) - 1)) >> (mp)->m_sectbb_log)
 483 #define XFS_BB_TO_FSST(mp,bb)   ((bb) >> (mp)->m_sectbb_log)
 484
 485 /*
 486  * File system sector to byte conversions.
 487  */
 488 #define XFS_FSS_TO_B(mp,sectno) ((xfs_fsize_t)(sectno) << (mp)->m_sb.sb_sectlog)
 489 #define XFS_B_TO_FSST(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_sectlog)
 490
 491 /*
 492  * File system block to basic block conversions.
 493  */
 494 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 495 #define XFS_BB_TO_FSB(mp,bb)    \
 496         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 497 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 498 #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 499
 500 /*
 501  * File system block to byte conversions.
 502  */
 503 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 504 #define XFS_B_TO_FSB(mp,b)      \
 505         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 506 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 507 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 508
 509 #endif  /* __XFS_SB_H__ */