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_BORGBIT          0x4000  /* ASCII only case-insens. */
  50 #define XFS_SB_VERSION_MOREBITSBIT      0x8000
  51 #define XFS_SB_VERSION_OKSASHFBITS      \
  52         (XFS_SB_VERSION_EXTFLGBIT | \
  53          XFS_SB_VERSION_DIRV2BIT | \
  54          XFS_SB_VERSION_BORGBIT)
  55 #define XFS_SB_VERSION_OKREALFBITS      \
  56         (XFS_SB_VERSION_ATTRBIT | \
  57          XFS_SB_VERSION_NLINKBIT | \
  58          XFS_SB_VERSION_QUOTABIT | \
  59          XFS_SB_VERSION_ALIGNBIT | \
  60          XFS_SB_VERSION_DALIGNBIT | \
  61          XFS_SB_VERSION_SHAREDBIT | \
  62          XFS_SB_VERSION_LOGV2BIT | \
  63          XFS_SB_VERSION_SECTORBIT | \
  64          XFS_SB_VERSION_MOREBITSBIT)
  65 #define XFS_SB_VERSION_OKREALBITS       \
  66         (XFS_SB_VERSION_NUMBITS | \
  67          XFS_SB_VERSION_OKREALFBITS | \
  68          XFS_SB_VERSION_OKSASHFBITS)
  69
  70 /*
  71  * There are two words to hold XFS "feature" bits: the original
  72  * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
  73  * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
  74  *
  75  * These defines represent bits in sb_features2.
  76  */
  77 #define XFS_SB_VERSION2_REALFBITS       0x00ffffff      /* Mask: features */
  78 #define XFS_SB_VERSION2_RESERVED1BIT    0x00000001
  79 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT  0x00000002      /* Superblk counters */
  80 #define XFS_SB_VERSION2_RESERVED4BIT    0x00000004
  81 #define XFS_SB_VERSION2_ATTR2BIT        0x00000008      /* Inline attr rework */
  82 #define XFS_SB_VERSION2_PARENTBIT       0x00000010      /* parent pointers */
  83 #define XFS_SB_VERSION2_PROJID32BIT     0x00000080      /* 32 bit project id */
  84
  85 #define XFS_SB_VERSION2_OKREALFBITS     \
  86         (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
  87          XFS_SB_VERSION2_ATTR2BIT       | \
  88          XFS_SB_VERSION2_PROJID32BIT)
  89 #define XFS_SB_VERSION2_OKSASHFBITS     \
  90         (0)
  91 #define XFS_SB_VERSION2_OKREALBITS      \
  92         (XFS_SB_VERSION2_OKREALFBITS |  \
  93          XFS_SB_VERSION2_OKSASHFBITS )
  94
  95 /*
  96  * Superblock - in core version.  Must match the ondisk version below.
  97  * Must be padded to 64 bit alignment.
  98  */
  99 typedef struct xfs_sb {
 100         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 101         __uint32_t      sb_blocksize;   /* logical block size, bytes */
 102         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
 103         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
 104         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 105         uuid_t          sb_uuid;        /* file system unique id */
 106         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 107         xfs_ino_t       sb_rootino;     /* root inode number */
 108         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 109         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 110         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 111         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 112         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 113         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 114         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 115         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 116         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 117         __uint16_t      sb_inodesize;   /* inode size, bytes */
 118         __uint16_t      sb_inopblock;   /* inodes per block */
 119         char            sb_fname[12];   /* file system name */
 120         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 121         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 122         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 123         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 124         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 125         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 126         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 127         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 128                                         /* statistics */
 129         /*
 130          * These fields must remain contiguous.  If you really
 131          * want to change their layout, make sure you fix the
 132          * code in xfs_trans_apply_sb_deltas().
 133          */
 134         __uint64_t      sb_icount;      /* allocated inodes */
 135         __uint64_t      sb_ifree;       /* free inodes */
 136         __uint64_t      sb_fdblocks;    /* free data blocks */
 137         __uint64_t      sb_frextents;   /* free realtime extents */
 138         /*
 139          * End contiguous fields.
 140          */
 141         xfs_ino_t       sb_uquotino;    /* user quota inode */
 142         xfs_ino_t       sb_gquotino;    /* group quota inode */
 143         __uint16_t      sb_qflags;      /* quota flags */
 144         __uint8_t       sb_flags;       /* misc. flags */
 145         __uint8_t       sb_shared_vn;   /* shared version number */
 146         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 147         __uint32_t      sb_unit;        /* stripe or raid unit */
 148         __uint32_t      sb_width;       /* stripe or raid width */
 149         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 150         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 151         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 152         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 153         __uint32_t      sb_features2;   /* additional feature bits */
 154
 155         /*
 156          * bad features2 field as a result of failing to pad the sb
 157          * structure to 64 bits. Some machines will be using this field
 158          * for features2 bits. Easiest just to mark it bad and not use
 159          * it for anything else.
 160          */
 161         __uint32_t      sb_bad_features2;
 162
 163         /* must be padded to 64 bit alignment */
 164 } xfs_sb_t;
 165
 166 /*
 167  * Superblock - on disk version.  Must match the in core version above.
 168  * Must be padded to 64 bit alignment.
 169  */
 170 typedef struct xfs_dsb {
 171         __be32          sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 172         __be32          sb_blocksize;   /* logical block size, bytes */
 173         __be64          sb_dblocks;     /* number of data blocks */
 174         __be64          sb_rblocks;     /* number of realtime blocks */
 175         __be64          sb_rextents;    /* number of realtime extents */
 176         uuid_t          sb_uuid;        /* file system unique id */
 177         __be64          sb_logstart;    /* starting block of log if internal */
 178         __be64          sb_rootino;     /* root inode number */
 179         __be64          sb_rbmino;      /* bitmap inode for realtime extents */
 180         __be64          sb_rsumino;     /* summary inode for rt bitmap */
 181         __be32          sb_rextsize;    /* realtime extent size, blocks */
 182         __be32          sb_agblocks;    /* size of an allocation group */
 183         __be32          sb_agcount;     /* number of allocation groups */
 184         __be32          sb_rbmblocks;   /* number of rt bitmap blocks */
 185         __be32          sb_logblocks;   /* number of log blocks */
 186         __be16          sb_versionnum;  /* header version == XFS_SB_VERSION */
 187         __be16          sb_sectsize;    /* volume sector size, bytes */
 188         __be16          sb_inodesize;   /* inode size, bytes */
 189         __be16          sb_inopblock;   /* inodes per block */
 190         char            sb_fname[12];   /* file system name */
 191         __u8            sb_blocklog;    /* log2 of sb_blocksize */
 192         __u8            sb_sectlog;     /* log2 of sb_sectsize */
 193         __u8            sb_inodelog;    /* log2 of sb_inodesize */
 194         __u8            sb_inopblog;    /* log2 of sb_inopblock */
 195         __u8            sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 196         __u8            sb_rextslog;    /* log2 of sb_rextents */
 197         __u8            sb_inprogress;  /* mkfs is in progress, don't mount */
 198         __u8            sb_imax_pct;    /* max % of fs for inode space */
 199                                         /* statistics */
 200         /*
 201          * These fields must remain contiguous.  If you really
 202          * want to change their layout, make sure you fix the
 203          * code in xfs_trans_apply_sb_deltas().
 204          */
 205         __be64          sb_icount;      /* allocated inodes */
 206         __be64          sb_ifree;       /* free inodes */
 207         __be64          sb_fdblocks;    /* free data blocks */
 208         __be64          sb_frextents;   /* free realtime extents */
 209         /*
 210          * End contiguous fields.
 211          */
 212         __be64          sb_uquotino;    /* user quota inode */
 213         __be64          sb_gquotino;    /* group quota inode */
 214         __be16          sb_qflags;      /* quota flags */
 215         __u8            sb_flags;       /* misc. flags */
 216         __u8            sb_shared_vn;   /* shared version number */
 217         __be32          sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 218         __be32          sb_unit;        /* stripe or raid unit */
 219         __be32          sb_width;       /* stripe or raid width */
 220         __u8            sb_dirblklog;   /* log2 of dir block size (fsbs) */
 221         __u8            sb_logsectlog;  /* log2 of the log sector size */
 222         __be16          sb_logsectsize; /* sector size for the log, bytes */
 223         __be32          sb_logsunit;    /* stripe unit size for the log */
 224         __be32          sb_features2;   /* additional feature bits */
 225         /*
 226          * bad features2 field as a result of failing to pad the sb
 227          * structure to 64 bits. Some machines will be using this field
 228          * for features2 bits. Easiest just to mark it bad and not use
 229          * it for anything else.
 230          */
 231         __be32  sb_bad_features2;
 232
 233         /* must be padded to 64 bit alignment */
 234 } xfs_dsb_t;
 235
 236 /*
 237  * Sequence number values for the fields.
 238  */
 239 typedef enum {
 240         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 241         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 242         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 243         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 244         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 245         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 246         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 247         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 248         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 249         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 250         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 251         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 252         XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
 253         XFS_SBS_FIELDCOUNT
 254 } xfs_sb_field_t;
 255
 256 /*
 257  * Mask values, defined based on the xfs_sb_field_t values.
 258  * Only define the ones we're using.
 259  */
 260 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 261 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 262 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 263 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 264 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 265 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 266 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 267 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 268 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 269 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 270 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 271 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 272 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 273 #define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 274 #define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 275 #define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 276 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 277 #define XFS_SB_BAD_FEATURES2    XFS_SB_MVAL(BAD_FEATURES2)
 278 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 279 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 280 #define XFS_SB_MOD_BITS         \
 281         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 282          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 283          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 284          XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
 285          XFS_SB_BAD_FEATURES2)
 286
 287
 288 /*
 289  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 290  * a feature bit is set when the flag is used.
 291  */
 292 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 293 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 294
 295 /*
 296  * define max. shared version we can interoperate with
 297  */
 298 #define XFS_SB_MAX_SHARED_VN    0
 299
 300 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 301
 302 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 303 {
 304         /* We always support version 1-3 */
 305         if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
 306             sbp->sb_versionnum <= XFS_SB_VERSION_3)
 307                 return 1;
 308
 309         /* We support version 4 if all feature bits are supported */
 310         if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
 311                 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
 312                     ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
 313                      (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
 314                         return 0;
 315
 316 #ifdef __KERNEL__
 317                 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 318                         return 0;
 319 #else
 320                 if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) &&
 321                     sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 322                         return 0;
 323 #endif
 324
 325                 return 1;
 326         }
 327
 328         return 0;
 329 }
 330
 331 /*
 332  * Detect a mismatched features2 field.  Older kernels read/wrote
 333  * this into the wrong slot, so to be safe we keep them in sync.
 334  */
 335 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
 336 {
 337         return (sbp->sb_bad_features2 != sbp->sb_features2);
 338 }
 339
 340 static inline unsigned xfs_sb_version_tonew(unsigned v)
 341 {
 342         if (v == XFS_SB_VERSION_1)
 343                 return XFS_SB_VERSION_4;
 344
 345         if (v == XFS_SB_VERSION_2)
 346                 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 347
 348         return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
 349                 XFS_SB_VERSION_NLINKBIT;
 350 }
 351
 352 static inline unsigned xfs_sb_version_toold(unsigned v)
 353 {
 354         if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
 355                 return 0;
 356         if (v & XFS_SB_VERSION_NLINKBIT)
 357                 return XFS_SB_VERSION_3;
 358         if (v & XFS_SB_VERSION_ATTRBIT)
 359                 return XFS_SB_VERSION_2;
 360         return XFS_SB_VERSION_1;
 361 }
 362
 363 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 364 {
 365         return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
 366                 sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 367                 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 368                  (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 369 }
 370
 371 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 372 {
 373         if (sbp->sb_versionnum == XFS_SB_VERSION_1)
 374                 sbp->sb_versionnum = XFS_SB_VERSION_2;
 375         else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
 376                 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
 377         else
 378                 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 379 }
 380
 381 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 382 {
 383         return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 384                  (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 385                   (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 386 }
 387
 388 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 389 {
 390         if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
 391                 sbp->sb_versionnum = XFS_SB_VERSION_3;
 392         else
 393                 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
 394 }
 395
 396 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 397 {
 398         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 399                 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 400 }
 401
 402 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 403 {
 404         if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
 405                 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
 406         else
 407                 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
 408                                         XFS_SB_VERSION_QUOTABIT;
 409 }
 410
 411 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 412 {
 413         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 414                 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 415 }
 416
 417 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 418 {
 419         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 420                 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 421 }
 422
 423 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 424 {
 425         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 426                 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 427 }
 428
 429 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 430 {
 431         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 432                 (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 433 }
 434
 435 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 436 {
 437         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 438                 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 439 }
 440
 441 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 442 {
 443         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 444                 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 445 }
 446
 447 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 448 {
 449         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 450                 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 451 }
 452
 453 static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
 454 {
 455         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 456                 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
 457 }
 458
 459 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 460 {
 461         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 462                 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 463 }
 464
 465 /*
 466  * sb_features2 bit version macros.
 467  *
 468  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 469  *
 470  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 471  *      ((xfs_sb_version_hasmorebits(sbp) &&
 472  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 473  */
 474
 475 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 476 {
 477         return xfs_sb_version_hasmorebits(sbp) &&
 478                 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT);
 479 }
 480
 481 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 482 {
 483         return xfs_sb_version_hasmorebits(sbp) &&
 484                 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 485 }
 486
 487 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 488 {
 489         sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
 490         sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
 491 }
 492
 493 static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
 494 {
 495         sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
 496         if (!sbp->sb_features2)
 497                 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
 498 }
 499
 500 static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
 501 {
 502         return xfs_sb_version_hasmorebits(sbp) &&
 503                 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT);
 504 }
 505
 506 /*
 507  * end of superblock version macros
 508  */
 509
 510 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 511 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 512 #define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)((bp)->b_addr))
 513
 514 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 515 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 516                         xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
 517 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 518                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 519
 520 /*
 521  * File system sector to basic block conversions.
 522  */
 523 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 524
 525 /*
 526  * File system block to basic block conversions.
 527  */
 528 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 529 #define XFS_BB_TO_FSB(mp,bb)    \
 530         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 531 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 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__ */