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