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_5        5               /* CRC enabled filesystem */
  36 #define XFS_SB_VERSION_NUMBITS          0x000f
  37 #define XFS_SB_VERSION_ALLFBITS         0xfff0
  38 #define XFS_SB_VERSION_SASHFBITS        0xf000
  39 #define XFS_SB_VERSION_REALFBITS        0x0ff0
  40 #define XFS_SB_VERSION_ATTRBIT          0x0010
  41 #define XFS_SB_VERSION_NLINKBIT         0x0020
  42 #define XFS_SB_VERSION_QUOTABIT         0x0040
  43 #define XFS_SB_VERSION_ALIGNBIT         0x0080
  44 #define XFS_SB_VERSION_DALIGNBIT        0x0100
  45 #define XFS_SB_VERSION_SHAREDBIT        0x0200
  46 #define XFS_SB_VERSION_LOGV2BIT         0x0400
  47 #define XFS_SB_VERSION_SECTORBIT        0x0800
  48 #define XFS_SB_VERSION_EXTFLGBIT        0x1000
  49 #define XFS_SB_VERSION_DIRV2BIT         0x2000
  50 #define XFS_SB_VERSION_BORGBIT          0x4000  /* ASCII only case-insens. */
  51 #define XFS_SB_VERSION_MOREBITSBIT      0x8000
  52 #define XFS_SB_VERSION_OKSASHFBITS      \
  53         (XFS_SB_VERSION_EXTFLGBIT | \
  54          XFS_SB_VERSION_DIRV2BIT | \
  55          XFS_SB_VERSION_BORGBIT)
  56 #define XFS_SB_VERSION_OKREALFBITS      \
  57         (XFS_SB_VERSION_ATTRBIT | \
  58          XFS_SB_VERSION_NLINKBIT | \
  59          XFS_SB_VERSION_QUOTABIT | \
  60          XFS_SB_VERSION_ALIGNBIT | \
  61          XFS_SB_VERSION_DALIGNBIT | \
  62          XFS_SB_VERSION_SHAREDBIT | \
  63          XFS_SB_VERSION_LOGV2BIT | \
  64          XFS_SB_VERSION_SECTORBIT | \
  65          XFS_SB_VERSION_MOREBITSBIT)
  66 #define XFS_SB_VERSION_OKREALBITS       \
  67         (XFS_SB_VERSION_NUMBITS | \
  68          XFS_SB_VERSION_OKREALFBITS | \
  69          XFS_SB_VERSION_OKSASHFBITS)
  70
  71 /*
  72  * There are two words to hold XFS "feature" bits: the original
  73  * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
  74  * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
  75  *
  76  * These defines represent bits in sb_features2.
  77  */
  78 #define XFS_SB_VERSION2_REALFBITS       0x00ffffff      /* Mask: features */
  79 #define XFS_SB_VERSION2_RESERVED1BIT    0x00000001
  80 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT  0x00000002      /* Superblk counters */
  81 #define XFS_SB_VERSION2_RESERVED4BIT    0x00000004
  82 #define XFS_SB_VERSION2_ATTR2BIT        0x00000008      /* Inline attr rework */
  83 #define XFS_SB_VERSION2_PARENTBIT       0x00000010      /* parent pointers */
  84 #define XFS_SB_VERSION2_PROJID32BIT     0x00000080      /* 32 bit project id */
  85 #define XFS_SB_VERSION2_CRCBIT          0x00000100      /* metadata CRCs */
  86
  87 #define XFS_SB_VERSION2_OKREALFBITS     \
  88         (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
  89          XFS_SB_VERSION2_ATTR2BIT       | \
  90          XFS_SB_VERSION2_PROJID32BIT)
  91 #define XFS_SB_VERSION2_OKSASHFBITS     \
  92         (0)
  93 #define XFS_SB_VERSION2_OKREALBITS      \
  94         (XFS_SB_VERSION2_OKREALFBITS |  \
  95          XFS_SB_VERSION2_OKSASHFBITS )
  96
  97 /*
  98  * Superblock - in core version.  Must match the ondisk version below.
  99  * Must be padded to 64 bit alignment.
 100  */
 101 typedef struct xfs_sb {
 102         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 103         __uint32_t      sb_blocksize;   /* logical block size, bytes */
 104         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
 105         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
 106         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 107         uuid_t          sb_uuid;        /* file system unique id */
 108         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 109         xfs_ino_t       sb_rootino;     /* root inode number */
 110         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 111         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 112         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 113         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 114         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 115         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 116         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 117         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 118         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 119         __uint16_t      sb_inodesize;   /* inode size, bytes */
 120         __uint16_t      sb_inopblock;   /* inodes per block */
 121         char            sb_fname[12];   /* file system name */
 122         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 123         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 124         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 125         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 126         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 127         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 128         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 129         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 130                                         /* statistics */
 131         /*
 132          * These fields must remain contiguous.  If you really
 133          * want to change their layout, make sure you fix the
 134          * code in xfs_trans_apply_sb_deltas().
 135          */
 136         __uint64_t      sb_icount;      /* allocated inodes */
 137         __uint64_t      sb_ifree;       /* free inodes */
 138         __uint64_t      sb_fdblocks;    /* free data blocks */
 139         __uint64_t      sb_frextents;   /* free realtime extents */
 140         /*
 141          * End contiguous fields.
 142          */
 143         xfs_ino_t       sb_uquotino;    /* user quota inode */
 144         xfs_ino_t       sb_gquotino;    /* group quota inode */
 145         __uint16_t      sb_qflags;      /* quota flags */
 146         __uint8_t       sb_flags;       /* misc. flags */
 147         __uint8_t       sb_shared_vn;   /* shared version number */
 148         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 149         __uint32_t      sb_unit;        /* stripe or raid unit */
 150         __uint32_t      sb_width;       /* stripe or raid width */
 151         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 152         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 153         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 154         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 155         __uint32_t      sb_features2;   /* additional feature bits */
 156
 157         /*
 158          * bad features2 field as a result of failing to pad the sb
 159          * structure to 64 bits. Some machines will be using this field
 160          * for features2 bits. Easiest just to mark it bad and not use
 161          * it for anything else.
 162          */
 163         __uint32_t      sb_bad_features2;
 164
 165         /* version 5 superblock fields start here */
 166
 167         /* feature masks */
 168         __uint32_t      sb_features_compat;
 169         __uint32_t      sb_features_ro_compat;
 170         __uint32_t      sb_features_incompat;
 171
 172         __uint32_t      sb_crc;         /* superblock crc */
 173
 174         xfs_ino_t       sb_pquotino;    /* project quota inode */
 175         xfs_lsn_t       sb_lsn;         /* last write sequence */
 176
 177         /* must be padded to 64 bit alignment */
 178 } xfs_sb_t;
 179
 180 /*
 181  * Superblock - on disk version.  Must match the in core version above.
 182  * Must be padded to 64 bit alignment.
 183  */
 184 typedef struct xfs_dsb {
 185         __be32          sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 186         __be32          sb_blocksize;   /* logical block size, bytes */
 187         __be64          sb_dblocks;     /* number of data blocks */
 188         __be64          sb_rblocks;     /* number of realtime blocks */
 189         __be64          sb_rextents;    /* number of realtime extents */
 190         uuid_t          sb_uuid;        /* file system unique id */
 191         __be64          sb_logstart;    /* starting block of log if internal */
 192         __be64          sb_rootino;     /* root inode number */
 193         __be64          sb_rbmino;      /* bitmap inode for realtime extents */
 194         __be64          sb_rsumino;     /* summary inode for rt bitmap */
 195         __be32          sb_rextsize;    /* realtime extent size, blocks */
 196         __be32          sb_agblocks;    /* size of an allocation group */
 197         __be32          sb_agcount;     /* number of allocation groups */
 198         __be32          sb_rbmblocks;   /* number of rt bitmap blocks */
 199         __be32          sb_logblocks;   /* number of log blocks */
 200         __be16          sb_versionnum;  /* header version == XFS_SB_VERSION */
 201         __be16          sb_sectsize;    /* volume sector size, bytes */
 202         __be16          sb_inodesize;   /* inode size, bytes */
 203         __be16          sb_inopblock;   /* inodes per block */
 204         char            sb_fname[12];   /* file system name */
 205         __u8            sb_blocklog;    /* log2 of sb_blocksize */
 206         __u8            sb_sectlog;     /* log2 of sb_sectsize */
 207         __u8            sb_inodelog;    /* log2 of sb_inodesize */
 208         __u8            sb_inopblog;    /* log2 of sb_inopblock */
 209         __u8            sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 210         __u8            sb_rextslog;    /* log2 of sb_rextents */
 211         __u8            sb_inprogress;  /* mkfs is in progress, don't mount */
 212         __u8            sb_imax_pct;    /* max % of fs for inode space */
 213                                         /* statistics */
 214         /*
 215          * These fields must remain contiguous.  If you really
 216          * want to change their layout, make sure you fix the
 217          * code in xfs_trans_apply_sb_deltas().
 218          */
 219         __be64          sb_icount;      /* allocated inodes */
 220         __be64          sb_ifree;       /* free inodes */
 221         __be64          sb_fdblocks;    /* free data blocks */
 222         __be64          sb_frextents;   /* free realtime extents */
 223         /*
 224          * End contiguous fields.
 225          */
 226         __be64          sb_uquotino;    /* user quota inode */
 227         __be64          sb_gquotino;    /* group quota inode */
 228         __be16          sb_qflags;      /* quota flags */
 229         __u8            sb_flags;       /* misc. flags */
 230         __u8            sb_shared_vn;   /* shared version number */
 231         __be32          sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 232         __be32          sb_unit;        /* stripe or raid unit */
 233         __be32          sb_width;       /* stripe or raid width */
 234         __u8            sb_dirblklog;   /* log2 of dir block size (fsbs) */
 235         __u8            sb_logsectlog;  /* log2 of the log sector size */
 236         __be16          sb_logsectsize; /* sector size for the log, bytes */
 237         __be32          sb_logsunit;    /* stripe unit size for the log */
 238         __be32          sb_features2;   /* additional feature bits */
 239         /*
 240          * bad features2 field as a result of failing to pad the sb
 241          * structure to 64 bits. Some machines will be using this field
 242          * for features2 bits. Easiest just to mark it bad and not use
 243          * it for anything else.
 244          */
 245         __be32          sb_bad_features2;
 246
 247         /* version 5 superblock fields start here */
 248
 249         /* feature masks */
 250         __be32          sb_features_compat;
 251         __be32          sb_features_ro_compat;
 252         __be32          sb_features_incompat;
 253
 254         __le32          sb_crc;         /* superblock crc */
 255
 256         __be64          sb_pquotino;    /* project quota inode */
 257         __be64          sb_lsn;         /* last write sequence */
 258
 259         /* must be padded to 64 bit alignment */
 260 } xfs_dsb_t;
 261
 262 /*
 263  * Sequence number values for the fields.
 264  */
 265 typedef enum {
 266         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 267         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 268         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 269         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 270         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 271         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 272         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 273         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 274         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 275         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 276         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 277         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 278         XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT,
 279         XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT, XFS_SBS_CRC,
 280         XFS_SBS_PQUOTINO, XFS_SBS_LSN,
 281         XFS_SBS_FIELDCOUNT
 282 } xfs_sb_field_t;
 283
 284 /*
 285  * Mask values, defined based on the xfs_sb_field_t values.
 286  * Only define the ones we're using.
 287  */
 288 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 289 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 290 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 291 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 292 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 293 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 294 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 295 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 296 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 297 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 298 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 299 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 300 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 301 #define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 302 #define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 303 #define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 304 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 305 #define XFS_SB_BAD_FEATURES2    XFS_SB_MVAL(BAD_FEATURES2)
 306 #define XFS_SB_FEATURES_COMPAT  XFS_SB_MVAL(FEATURES_COMPAT)
 307 #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
 308 #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
 309 #define XFS_SB_CRC              XFS_SB_MVAL(CRC)
 310 #define XFS_SB_PQUOTINO         XFS_SB_MVAL(PQUOTINO)
 311 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 312 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 313 #define XFS_SB_MOD_BITS         \
 314         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 315          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 316          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 317          XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
 318          XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
 319          XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | XFS_SB_PQUOTINO)
 320
 321
 322 /*
 323  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 324  * a feature bit is set when the flag is used.
 325  */
 326 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 327 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 328
 329 /*
 330  * define max. shared version we can interoperate with
 331  */
 332 #define XFS_SB_MAX_SHARED_VN    0
 333
 334 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 335
 336 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 337 {
 338         /* We always support version 1-3 */
 339         if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
 340             sbp->sb_versionnum <= XFS_SB_VERSION_3)
 341                 return 1;
 342
 343         /* We support version 4 if all feature bits are supported */
 344         if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
 345                 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
 346                     ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
 347                      (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
 348                         return 0;
 349
 350 #ifdef __KERNEL__
 351                 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 352                         return 0;
 353 #else
 354                 if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) &&
 355                     sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 356                         return 0;
 357 #endif
 358
 359                 return 1;
 360         }
 361         if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
 362                 return 1;
 363
 364         return 0;
 365 }
 366
 367 /*
 368  * Detect a mismatched features2 field.  Older kernels read/wrote
 369  * this into the wrong slot, so to be safe we keep them in sync.
 370  */
 371 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
 372 {
 373         return (sbp->sb_bad_features2 != sbp->sb_features2);
 374 }
 375
 376 static inline unsigned xfs_sb_version_tonew(unsigned v)
 377 {
 378         if (v == XFS_SB_VERSION_1)
 379                 return XFS_SB_VERSION_4;
 380
 381         if (v == XFS_SB_VERSION_2)
 382                 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 383
 384         return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
 385                 XFS_SB_VERSION_NLINKBIT;
 386 }
 387
 388 static inline unsigned xfs_sb_version_toold(unsigned v)
 389 {
 390         if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
 391                 return 0;
 392         if (v & XFS_SB_VERSION_NLINKBIT)
 393                 return XFS_SB_VERSION_3;
 394         if (v & XFS_SB_VERSION_ATTRBIT)
 395                 return XFS_SB_VERSION_2;
 396         return XFS_SB_VERSION_1;
 397 }
 398
 399 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 400 {
 401         return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
 402                 sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 403                 (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 404                  (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 405 }
 406
 407 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 408 {
 409         if (sbp->sb_versionnum == XFS_SB_VERSION_1)
 410                 sbp->sb_versionnum = XFS_SB_VERSION_2;
 411         else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
 412                 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
 413         else
 414                 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 415 }
 416
 417 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 418 {
 419         return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 420                  (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 421                   (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 422 }
 423
 424 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 425 {
 426         if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
 427                 sbp->sb_versionnum = XFS_SB_VERSION_3;
 428         else
 429                 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
 430 }
 431
 432 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 433 {
 434         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 435                 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 436 }
 437
 438 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 439 {
 440         if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
 441                 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
 442         else
 443                 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
 444                                         XFS_SB_VERSION_QUOTABIT;
 445 }
 446
 447 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 448 {
 449         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 450                (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 451                 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
 452 }
 453
 454 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 455 {
 456         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 457                 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 458 }
 459
 460 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 461 {
 462         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 463                 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 464 }
 465
 466 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 467 {
 468         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 469                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 470                 (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT));
 471 }
 472
 473 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 474 {
 475         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 476                (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 477                 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT));
 478 }
 479
 480 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 481 {
 482         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 483                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 484                 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT));
 485 }
 486
 487 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 488 {
 489         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 490                 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 491 }
 492
 493 static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
 494 {
 495         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 496                 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
 497 }
 498
 499 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 500 {
 501         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 502                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 503                 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT));
 504 }
 505
 506 /*
 507  * sb_features2 bit version macros.
 508  *
 509  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 510  *
 511  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 512  *      ((xfs_sb_version_hasmorebits(sbp) &&
 513  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 514  */
 515
 516 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 517 {
 518         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 519                (xfs_sb_version_hasmorebits(sbp) &&
 520                 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
 521 }
 522
 523 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 524 {
 525         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 526                (xfs_sb_version_hasmorebits(sbp) &&
 527                 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT));
 528 }
 529
 530 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 531 {
 532         sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
 533         sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
 534 }
 535
 536 static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
 537 {
 538         sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
 539         if (!sbp->sb_features2)
 540                 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
 541 }
 542
 543 static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
 544 {
 545         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 546                (xfs_sb_version_hasmorebits(sbp) &&
 547                 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT));
 548 }
 549
 550 static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
 551 {
 552         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
 553 }
 554
 555 /*
 556  * end of superblock version macros
 557  */
 558
 559 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 560 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 561 #define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)((bp)->b_addr))
 562
 563 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 564 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 565                         xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
 566 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 567                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 568
 569 /*
 570  * File system sector to basic block conversions.
 571  */
 572 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 573
 574 /*
 575  * File system block to basic block conversions.
 576  */
 577 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 578 #define XFS_BB_TO_FSB(mp,bb)    \
 579         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 580 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 581
 582 /*
 583  * File system block to byte conversions.
 584  */
 585 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 586 #define XFS_B_TO_FSB(mp,b)      \
 587         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 588 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 589 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 590
 591 #endif  /* __XFS_SB_H__ */