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 /*
  91  * Superblock - in core version.  Must match the ondisk version below.
  92  */
  93 typedef struct xfs_sb {
  94         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
  95         __uint32_t      sb_blocksize;   /* logical block size, bytes */
  96         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
  97         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
  98         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
  99         uuid_t          sb_uuid;        /* file system unique id */
 100         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 101         xfs_ino_t       sb_rootino;     /* root inode number */
 102         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 103         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 104         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 105         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 106         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 107         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 108         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 109         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 110         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 111         __uint16_t      sb_inodesize;   /* inode size, bytes */
 112         __uint16_t      sb_inopblock;   /* inodes per block */
 113         char            sb_fname[12];   /* file system name */
 114         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 115         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 116         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 117         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 118         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 119         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 120         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 121         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 122                                         /* statistics */
 123         /*
 124          * These fields must remain contiguous.  If you really
 125          * want to change their layout, make sure you fix the
 126          * code in xfs_trans_apply_sb_deltas().
 127          */
 128         __uint64_t      sb_icount;      /* allocated inodes */
 129         __uint64_t      sb_ifree;       /* free inodes */
 130         __uint64_t      sb_fdblocks;    /* free data blocks */
 131         __uint64_t      sb_frextents;   /* free realtime extents */
 132         /*
 133          * End contiguous fields.
 134          */
 135         xfs_ino_t       sb_uquotino;    /* user quota inode */
 136         xfs_ino_t       sb_gquotino;    /* group quota inode */
 137         __uint16_t      sb_qflags;      /* quota flags */
 138         __uint8_t       sb_flags;       /* misc. flags */
 139         __uint8_t       sb_shared_vn;   /* shared version number */
 140         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 141         __uint32_t      sb_unit;        /* stripe or raid unit */
 142         __uint32_t      sb_width;       /* stripe or raid width */
 143         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 144         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 145         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 146         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 147         __uint32_t      sb_features2;   /* additional feature bits */
 148 } xfs_sb_t;
 149
 150 /*
 151  * Superblock - on disk version.  Must match the in core version below.
 152  */
 153 typedef struct xfs_dsb {
 154         __be32          sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 155         __be32          sb_blocksize;   /* logical block size, bytes */
 156         __be64          sb_dblocks;     /* number of data blocks */
 157         __be64          sb_rblocks;     /* number of realtime blocks */
 158         __be64          sb_rextents;    /* number of realtime extents */
 159         uuid_t          sb_uuid;        /* file system unique id */
 160         __be64          sb_logstart;    /* starting block of log if internal */
 161         __be64          sb_rootino;     /* root inode number */
 162         __be64          sb_rbmino;      /* bitmap inode for realtime extents */
 163         __be64          sb_rsumino;     /* summary inode for rt bitmap */
 164         __be32          sb_rextsize;    /* realtime extent size, blocks */
 165         __be32          sb_agblocks;    /* size of an allocation group */
 166         __be32          sb_agcount;     /* number of allocation groups */
 167         __be32          sb_rbmblocks;   /* number of rt bitmap blocks */
 168         __be32          sb_logblocks;   /* number of log blocks */
 169         __be16          sb_versionnum;  /* header version == XFS_SB_VERSION */
 170         __be16          sb_sectsize;    /* volume sector size, bytes */
 171         __be16          sb_inodesize;   /* inode size, bytes */
 172         __be16          sb_inopblock;   /* inodes per block */
 173         char            sb_fname[12];   /* file system name */
 174         __u8            sb_blocklog;    /* log2 of sb_blocksize */
 175         __u8            sb_sectlog;     /* log2 of sb_sectsize */
 176         __u8            sb_inodelog;    /* log2 of sb_inodesize */
 177         __u8            sb_inopblog;    /* log2 of sb_inopblock */
 178         __u8            sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 179         __u8            sb_rextslog;    /* log2 of sb_rextents */
 180         __u8            sb_inprogress;  /* mkfs is in progress, don't mount */
 181         __u8            sb_imax_pct;    /* max % of fs for inode space */
 182                                         /* statistics */
 183         /*
 184          * These fields must remain contiguous.  If you really
 185          * want to change their layout, make sure you fix the
 186          * code in xfs_trans_apply_sb_deltas().
 187          */
 188         __be64          sb_icount;      /* allocated inodes */
 189         __be64          sb_ifree;       /* free inodes */
 190         __be64          sb_fdblocks;    /* free data blocks */
 191         __be64          sb_frextents;   /* free realtime extents */
 192         /*
 193          * End contiguous fields.
 194          */
 195         __be64          sb_uquotino;    /* user quota inode */
 196         __be64          sb_gquotino;    /* group quota inode */
 197         __be16          sb_qflags;      /* quota flags */
 198         __u8            sb_flags;       /* misc. flags */
 199         __u8            sb_shared_vn;   /* shared version number */
 200         __be32          sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 201         __be32          sb_unit;        /* stripe or raid unit */
 202         __be32          sb_width;       /* stripe or raid width */
 203         __u8            sb_dirblklog;   /* log2 of dir block size (fsbs) */
 204         __u8            sb_logsectlog;  /* log2 of the log sector size */
 205         __be16          sb_logsectsize; /* sector size for the log, bytes */
 206         __be32          sb_logsunit;    /* stripe unit size for the log */
 207         __be32          sb_features2;   /* additional feature bits */
 208 } xfs_dsb_t;
 209
 210 /*
 211  * Sequence number values for the fields.
 212  */
 213 typedef enum {
 214         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 215         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 216         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 217         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 218         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 219         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 220         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 221         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 222         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 223         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 224         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 225         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 226         XFS_SBS_FEATURES2,
 227         XFS_SBS_FIELDCOUNT
 228 } xfs_sb_field_t;
 229
 230 /*
 231  * Mask values, defined based on the xfs_sb_field_t values.
 232  * Only define the ones we're using.
 233  */
 234 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 235 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 236 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 237 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 238 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 239 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 240 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 241 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 242 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 243 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 244 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 245 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 246 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 247 #define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 248 #define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 249 #define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 250 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 251 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 252 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 253 #define XFS_SB_MOD_BITS         \
 254         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 255          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 256          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 257          XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2)
 258
 259
 260 /*
 261  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 262  * a feature bit is set when the flag is used.
 263  */
 264 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 265 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 266
 267 /*
 268  * define max. shared version we can interoperate with
 269  */
 270 #define XFS_SB_MAX_SHARED_VN    0
 271
 272 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 273
 274 #define XFS_SB_GOOD_VERSION(sbp)        xfs_sb_good_version(sbp)
 275 #ifdef __KERNEL__
 276 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 277 {
 278         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 279                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 280                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 281                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 282                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 283                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 284                     (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 285 }
 286 #else
 287 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 288 {
 289         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 290                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 291                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 292                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 293                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 294                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 295                   (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 296                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 297 }
 298 #endif /* __KERNEL__ */
 299
 300 #define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
 301 static inline unsigned xfs_sb_version_tonew(unsigned v)
 302 {
 303         return ((((v) == XFS_SB_VERSION_1) ? \
 304                 0 : \
 305                 (((v) == XFS_SB_VERSION_2) ? \
 306                         XFS_SB_VERSION_ATTRBIT : \
 307                         (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 308                 XFS_SB_VERSION_4);
 309 }
 310
 311 #define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
 312 static inline unsigned xfs_sb_version_toold(unsigned v)
 313 {
 314         return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 315                 0 : \
 316                 (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 317                         XFS_SB_VERSION_3 : \
 318                         (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 319                                 XFS_SB_VERSION_2 : \
 320                                 XFS_SB_VERSION_1)));
 321 }
 322
 323 #define XFS_SB_VERSION_HASATTR(sbp)     xfs_sb_version_hasattr(sbp)
 324 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 325 {
 326         return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 327                  ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 328                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 329                   ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 330 }
 331
 332 #define XFS_SB_VERSION_ADDATTR(sbp)     xfs_sb_version_addattr(sbp)
 333 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 334 {
 335         (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 336                 XFS_SB_VERSION_2 : \
 337                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 338                         ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 339                         (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 340 }
 341
 342 #define XFS_SB_VERSION_HASNLINK(sbp)    xfs_sb_version_hasnlink(sbp)
 343 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 344 {
 345         return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 346                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 347                   ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 348 }
 349
 350 #define XFS_SB_VERSION_ADDNLINK(sbp)    xfs_sb_version_addnlink(sbp)
 351 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 352 {
 353         (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 354                 XFS_SB_VERSION_3 : \
 355                 ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 356 }
 357
 358 #define XFS_SB_VERSION_HASQUOTA(sbp)    xfs_sb_version_hasquota(sbp)
 359 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 360 {
 361         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 362                 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 363 }
 364
 365 #define XFS_SB_VERSION_ADDQUOTA(sbp)    xfs_sb_version_addquota(sbp)
 366 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 367 {
 368         (sbp)->sb_versionnum = \
 369                  (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 370                         ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 371                         (XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
 372                          XFS_SB_VERSION_QUOTABIT));
 373 }
 374
 375 #define XFS_SB_VERSION_HASALIGN(sbp)    xfs_sb_version_hasalign(sbp)
 376 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 377 {
 378         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 379                 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 380 }
 381
 382 #define XFS_SB_VERSION_SUBALIGN(sbp)    xfs_sb_version_subalign(sbp)
 383 static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
 384 {
 385         (sbp)->sb_versionnum = \
 386          XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
 387 }
 388
 389 #define XFS_SB_VERSION_HASDALIGN(sbp)   xfs_sb_version_hasdalign(sbp)
 390 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 391 {
 392         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 393                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 394 }
 395
 396 #define XFS_SB_VERSION_ADDDALIGN(sbp)   xfs_sb_version_adddalign(sbp)
 397 static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
 398 {
 399         return (sbp)->sb_versionnum = \
 400                 ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
 401 }
 402
 403 #define XFS_SB_VERSION_HASSHARED(sbp)   xfs_sb_version_hasshared(sbp)
 404 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 405 {
 406         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 407                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 408 }
 409
 410 #define XFS_SB_VERSION_ADDSHARED(sbp)   xfs_sb_version_addshared(sbp)
 411 static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
 412 {
 413         return (sbp)->sb_versionnum = \
 414                 ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
 415 }
 416
 417 #define XFS_SB_VERSION_SUBSHARED(sbp)   xfs_sb_version_subshared(sbp)
 418 static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
 419 {
 420         return (sbp)->sb_versionnum = \
 421                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
 422 }
 423
 424 #define XFS_SB_VERSION_HASDIRV2(sbp)    xfs_sb_version_hasdirv2(sbp)
 425 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 426 {
 427         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 428                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 429 }
 430
 431 #define XFS_SB_VERSION_HASLOGV2(sbp)   xfs_sb_version_haslogv2(sbp)
 432 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 433 {
 434         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 435                 ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 436 }
 437
 438 #define XFS_SB_VERSION_HASEXTFLGBIT(sbp)        xfs_sb_version_hasextflgbit(sbp)
 439 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 440 {
 441         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 442                 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 443 }
 444
 445 #define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)        xfs_sb_version_addextflgbit(sbp)
 446 static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
 447 {
 448         return (sbp)->sb_versionnum = \
 449                 ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
 450 }
 451
 452 #define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)        xfs_sb_version_subextflgbit(sbp)
 453 static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
 454 {
 455         return (sbp)->sb_versionnum = \
 456                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
 457 }
 458
 459 #define XFS_SB_VERSION_HASSECTOR(sbp)   xfs_sb_version_hassector(sbp)
 460 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 461 {
 462         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 463                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 464 }
 465
 466 #define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
 467 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 468 {
 469         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 470                 ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 471 }
 472
 473 /*
 474  * sb_features2 bit version macros.
 475  *
 476  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 477  *
 478  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 479  *      ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
 480  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 481  */
 482
 483 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 484 {
 485         return (XFS_SB_VERSION_HASMOREBITS(sbp) &&      \
 486                 ((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
 487 }
 488
 489 #define XFS_SB_VERSION_HASATTR2(sbp)    xfs_sb_version_hasattr2(sbp)
 490 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 491 {
 492         return (XFS_SB_VERSION_HASMOREBITS(sbp)) &&     \
 493                 ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 494 }
 495
 496 #define XFS_SB_VERSION_ADDATTR2(sbp)    xfs_sb_version_addattr2(sbp)
 497 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 498 {
 499         ((sbp)->sb_versionnum = \
 500                 ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 501         ((sbp)->sb_features2 =  \
 502                 ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 503 }
 504
 505 /*
 506  * end of superblock version macros
 507  */
 508
 509 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 510 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 511 #define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)XFS_BUF_PTR(bp))
 512
 513 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 514 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 515                         XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 516 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 517                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 518
 519 /*
 520  * File system sector to basic block conversions.
 521  */
 522 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 523
 524 /*
 525  * File system block to basic block conversions.
 526  */
 527 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 528 #define XFS_BB_TO_FSB(mp,bb)    \
 529         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 530 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 531 #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 532
 533 /*
 534  * File system block to byte conversions.
 535  */
 536 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 537 #define XFS_B_TO_FSB(mp,b)      \
 538         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 539 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 540 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 541
 542 #endif  /* __XFS_SB_H__ */