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  * Must be padded to 64 bit alignment.
  93  */
  94 typedef struct xfs_sb {
  95         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
  96         __uint32_t      sb_blocksize;   /* logical block size, bytes */
  97         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
  98         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
  99         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 100         uuid_t          sb_uuid;        /* file system unique id */
 101         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 102         xfs_ino_t       sb_rootino;     /* root inode number */
 103         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 104         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 105         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 106         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 107         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 108         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 109         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 110         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 111         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 112         __uint16_t      sb_inodesize;   /* inode size, bytes */
 113         __uint16_t      sb_inopblock;   /* inodes per block */
 114         char            sb_fname[12];   /* file system name */
 115         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 116         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 117         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 118         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 119         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 120         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 121         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 122         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 123                                         /* statistics */
 124         /*
 125          * These fields must remain contiguous.  If you really
 126          * want to change their layout, make sure you fix the
 127          * code in xfs_trans_apply_sb_deltas().
 128          */
 129         __uint64_t      sb_icount;      /* allocated inodes */
 130         __uint64_t      sb_ifree;       /* free inodes */
 131         __uint64_t      sb_fdblocks;    /* free data blocks */
 132         __uint64_t      sb_frextents;   /* free realtime extents */
 133         /*
 134          * End contiguous fields.
 135          */
 136         xfs_ino_t       sb_uquotino;    /* user quota inode */
 137         xfs_ino_t       sb_gquotino;    /* group quota inode */
 138         __uint16_t      sb_qflags;      /* quota flags */
 139         __uint8_t       sb_flags;       /* misc. flags */
 140         __uint8_t       sb_shared_vn;   /* shared version number */
 141         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 142         __uint32_t      sb_unit;        /* stripe or raid unit */
 143         __uint32_t      sb_width;       /* stripe or raid width */
 144         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 145         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 146         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 147         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 148         __uint32_t      sb_features2;   /* additional feature bits */
 149
 150         /*
 151          * bad features2 field as a result of failing to pad the sb
 152          * structure to 64 bits. Some machines will be using this field
 153          * for features2 bits. Easiest just to mark it bad and not use
 154          * it for anything else.
 155          */
 156         __uint32_t      sb_bad_features2;
 157
 158         /* must be padded to 64 bit alignment */
 159 } xfs_sb_t;
 160
 161 /*
 162  * Superblock - on disk version.  Must match the in core version above.
 163  * Must be padded to 64 bit alignment.
 164  */
 165 typedef struct xfs_dsb {
 166         __be32          sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 167         __be32          sb_blocksize;   /* logical block size, bytes */
 168         __be64          sb_dblocks;     /* number of data blocks */
 169         __be64          sb_rblocks;     /* number of realtime blocks */
 170         __be64          sb_rextents;    /* number of realtime extents */
 171         uuid_t          sb_uuid;        /* file system unique id */
 172         __be64          sb_logstart;    /* starting block of log if internal */
 173         __be64          sb_rootino;     /* root inode number */
 174         __be64          sb_rbmino;      /* bitmap inode for realtime extents */
 175         __be64          sb_rsumino;     /* summary inode for rt bitmap */
 176         __be32          sb_rextsize;    /* realtime extent size, blocks */
 177         __be32          sb_agblocks;    /* size of an allocation group */
 178         __be32          sb_agcount;     /* number of allocation groups */
 179         __be32          sb_rbmblocks;   /* number of rt bitmap blocks */
 180         __be32          sb_logblocks;   /* number of log blocks */
 181         __be16          sb_versionnum;  /* header version == XFS_SB_VERSION */
 182         __be16          sb_sectsize;    /* volume sector size, bytes */
 183         __be16          sb_inodesize;   /* inode size, bytes */
 184         __be16          sb_inopblock;   /* inodes per block */
 185         char            sb_fname[12];   /* file system name */
 186         __u8            sb_blocklog;    /* log2 of sb_blocksize */
 187         __u8            sb_sectlog;     /* log2 of sb_sectsize */
 188         __u8            sb_inodelog;    /* log2 of sb_inodesize */
 189         __u8            sb_inopblog;    /* log2 of sb_inopblock */
 190         __u8            sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 191         __u8            sb_rextslog;    /* log2 of sb_rextents */
 192         __u8            sb_inprogress;  /* mkfs is in progress, don't mount */
 193         __u8            sb_imax_pct;    /* max % of fs for inode space */
 194                                         /* statistics */
 195         /*
 196          * These fields must remain contiguous.  If you really
 197          * want to change their layout, make sure you fix the
 198          * code in xfs_trans_apply_sb_deltas().
 199          */
 200         __be64          sb_icount;      /* allocated inodes */
 201         __be64          sb_ifree;       /* free inodes */
 202         __be64          sb_fdblocks;    /* free data blocks */
 203         __be64          sb_frextents;   /* free realtime extents */
 204         /*
 205          * End contiguous fields.
 206          */
 207         __be64          sb_uquotino;    /* user quota inode */
 208         __be64          sb_gquotino;    /* group quota inode */
 209         __be16          sb_qflags;      /* quota flags */
 210         __u8            sb_flags;       /* misc. flags */
 211         __u8            sb_shared_vn;   /* shared version number */
 212         __be32          sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 213         __be32          sb_unit;        /* stripe or raid unit */
 214         __be32          sb_width;       /* stripe or raid width */
 215         __u8            sb_dirblklog;   /* log2 of dir block size (fsbs) */
 216         __u8            sb_logsectlog;  /* log2 of the log sector size */
 217         __be16          sb_logsectsize; /* sector size for the log, bytes */
 218         __be32          sb_logsunit;    /* stripe unit size for the log */
 219         __be32          sb_features2;   /* additional feature bits */
 220         /*
 221          * bad features2 field as a result of failing to pad the sb
 222          * structure to 64 bits. Some machines will be using this field
 223          * for features2 bits. Easiest just to mark it bad and not use
 224          * it for anything else.
 225          */
 226         __be32  sb_bad_features2;
 227
 228         /* must be padded to 64 bit alignment */
 229 } xfs_dsb_t;
 230
 231 /*
 232  * Sequence number values for the fields.
 233  */
 234 typedef enum {
 235         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 236         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 237         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 238         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 239         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 240         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 241         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 242         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 243         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 244         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 245         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 246         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 247         XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
 248         XFS_SBS_FIELDCOUNT
 249 } xfs_sb_field_t;
 250
 251 /*
 252  * Mask values, defined based on the xfs_sb_field_t values.
 253  * Only define the ones we're using.
 254  */
 255 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 256 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 257 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 258 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 259 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 260 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 261 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 262 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 263 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 264 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 265 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 266 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 267 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 268 #define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 269 #define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 270 #define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 271 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 272 #define XFS_SB_BAD_FEATURES2    XFS_SB_MVAL(BAD_FEATURES2)
 273 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 274 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 275 #define XFS_SB_MOD_BITS         \
 276         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 277          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 278          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 279          XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
 280          XFS_SB_BAD_FEATURES2)
 281
 282
 283 /*
 284  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 285  * a feature bit is set when the flag is used.
 286  */
 287 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 288 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 289
 290 /*
 291  * define max. shared version we can interoperate with
 292  */
 293 #define XFS_SB_MAX_SHARED_VN    0
 294
 295 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 296
 297 #ifdef __KERNEL__
 298 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 299 {
 300         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 301                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 302                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 303                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 304                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 305                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 306                     (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 307 }
 308 #else
 309 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 310 {
 311         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 312                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 313                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 314                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 315                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 316                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 317                   (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 318                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 319 }
 320 #endif /* __KERNEL__ */
 321
 322 /*
 323  * Detect a mismatched features2 field.  Older kernels read/wrote
 324  * this into the wrong slot, so to be safe we keep them in sync.
 325  */
 326 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
 327 {
 328         return (sbp->sb_bad_features2 != sbp->sb_features2);
 329 }
 330
 331 static inline unsigned xfs_sb_version_tonew(unsigned v)
 332 {
 333         return ((((v) == XFS_SB_VERSION_1) ? \
 334                 0 : \
 335                 (((v) == XFS_SB_VERSION_2) ? \
 336                         XFS_SB_VERSION_ATTRBIT : \
 337                         (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 338                 XFS_SB_VERSION_4);
 339 }
 340
 341 static inline unsigned xfs_sb_version_toold(unsigned v)
 342 {
 343         return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 344                 0 : \
 345                 (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 346                         XFS_SB_VERSION_3 : \
 347                         (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 348                                 XFS_SB_VERSION_2 : \
 349                                 XFS_SB_VERSION_1)));
 350 }
 351
 352 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 353 {
 354         return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 355                  ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 356                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 357                   ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 358 }
 359
 360 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 361 {
 362         (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 363                 XFS_SB_VERSION_2 : \
 364                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 365                         ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 366                         (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 367 }
 368
 369 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 370 {
 371         return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 372                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 373                   ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 374 }
 375
 376 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 377 {
 378         (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 379                 XFS_SB_VERSION_3 : \
 380                 ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 381 }
 382
 383 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 384 {
 385         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 386                 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 387 }
 388
 389 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 390 {
 391         (sbp)->sb_versionnum = \
 392                  (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 393                         ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 394                         (xfs_sb_version_tonew((sbp)->sb_versionnum) | \
 395                          XFS_SB_VERSION_QUOTABIT));
 396 }
 397
 398 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 399 {
 400         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 401                 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 402 }
 403
 404 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 405 {
 406         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 407                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 408 }
 409
 410 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 411 {
 412         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 413                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 414 }
 415
 416 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 417 {
 418         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 419                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 420 }
 421
 422 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 423 {
 424         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 425                 ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 426 }
 427
 428 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 429 {
 430         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 431                 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 432 }
 433
 434 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 435 {
 436         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 437                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 438 }
 439
 440 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 441 {
 442         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 443                 ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 444 }
 445
 446 /*
 447  * sb_features2 bit version macros.
 448  *
 449  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 450  *
 451  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 452  *      ((xfs_sb_version_hasmorebits(sbp) &&
 453  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 454  */
 455
 456 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 457 {
 458         return (xfs_sb_version_hasmorebits(sbp) &&      \
 459                 ((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
 460 }
 461
 462 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 463 {
 464         return (xfs_sb_version_hasmorebits(sbp)) &&     \
 465                 ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 466 }
 467
 468 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 469 {
 470         ((sbp)->sb_versionnum = \
 471                 ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 472         ((sbp)->sb_features2 =  \
 473                 ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 474 }
 475
 476 /*
 477  * end of superblock version macros
 478  */
 479
 480 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 481 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 482 #define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)XFS_BUF_PTR(bp))
 483
 484 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 485 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 486                         XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 487 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 488                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 489
 490 /*
 491  * File system sector to basic block conversions.
 492  */
 493 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 494
 495 /*
 496  * File system block to basic block conversions.
 497  */
 498 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 499 #define XFS_BB_TO_FSB(mp,bb)    \
 500         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 501 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 502 #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 503
 504 /*
 505  * File system block to byte conversions.
 506  */
 507 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 508 #define XFS_B_TO_FSB(mp,b)      \
 509         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 510 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 511 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 512
 513 #endif  /* __XFS_SB_H__ */