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         __uint32_t      sb_features_log_incompat;
 172
 173         __uint32_t      sb_crc;         /* superblock crc */
 174         __uint32_t      sb_pad;
 175
 176         xfs_ino_t       sb_pquotino;    /* project quota inode */
 177         xfs_lsn_t       sb_lsn;         /* last write sequence */
 178
 179         /* must be padded to 64 bit alignment */
 180 } xfs_sb_t;
 181
 182 /*
 183  * Superblock - on disk version.  Must match the in core version above.
 184  * Must be padded to 64 bit alignment.
 185  */
 186 typedef struct xfs_dsb {
 187         __be32          sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 188         __be32          sb_blocksize;   /* logical block size, bytes */
 189         __be64          sb_dblocks;     /* number of data blocks */
 190         __be64          sb_rblocks;     /* number of realtime blocks */
 191         __be64          sb_rextents;    /* number of realtime extents */
 192         uuid_t          sb_uuid;        /* file system unique id */
 193         __be64          sb_logstart;    /* starting block of log if internal */
 194         __be64          sb_rootino;     /* root inode number */
 195         __be64          sb_rbmino;      /* bitmap inode for realtime extents */
 196         __be64          sb_rsumino;     /* summary inode for rt bitmap */
 197         __be32          sb_rextsize;    /* realtime extent size, blocks */
 198         __be32          sb_agblocks;    /* size of an allocation group */
 199         __be32          sb_agcount;     /* number of allocation groups */
 200         __be32          sb_rbmblocks;   /* number of rt bitmap blocks */
 201         __be32          sb_logblocks;   /* number of log blocks */
 202         __be16          sb_versionnum;  /* header version == XFS_SB_VERSION */
 203         __be16          sb_sectsize;    /* volume sector size, bytes */
 204         __be16          sb_inodesize;   /* inode size, bytes */
 205         __be16          sb_inopblock;   /* inodes per block */
 206         char            sb_fname[12];   /* file system name */
 207         __u8            sb_blocklog;    /* log2 of sb_blocksize */
 208         __u8            sb_sectlog;     /* log2 of sb_sectsize */
 209         __u8            sb_inodelog;    /* log2 of sb_inodesize */
 210         __u8            sb_inopblog;    /* log2 of sb_inopblock */
 211         __u8            sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 212         __u8            sb_rextslog;    /* log2 of sb_rextents */
 213         __u8            sb_inprogress;  /* mkfs is in progress, don't mount */
 214         __u8            sb_imax_pct;    /* max % of fs for inode space */
 215                                         /* statistics */
 216         /*
 217          * These fields must remain contiguous.  If you really
 218          * want to change their layout, make sure you fix the
 219          * code in xfs_trans_apply_sb_deltas().
 220          */
 221         __be64          sb_icount;      /* allocated inodes */
 222         __be64          sb_ifree;       /* free inodes */
 223         __be64          sb_fdblocks;    /* free data blocks */
 224         __be64          sb_frextents;   /* free realtime extents */
 225         /*
 226          * End contiguous fields.
 227          */
 228         __be64          sb_uquotino;    /* user quota inode */
 229         __be64          sb_gquotino;    /* group quota inode */
 230         __be16          sb_qflags;      /* quota flags */
 231         __u8            sb_flags;       /* misc. flags */
 232         __u8            sb_shared_vn;   /* shared version number */
 233         __be32          sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 234         __be32          sb_unit;        /* stripe or raid unit */
 235         __be32          sb_width;       /* stripe or raid width */
 236         __u8            sb_dirblklog;   /* log2 of dir block size (fsbs) */
 237         __u8            sb_logsectlog;  /* log2 of the log sector size */
 238         __be16          sb_logsectsize; /* sector size for the log, bytes */
 239         __be32          sb_logsunit;    /* stripe unit size for the log */
 240         __be32          sb_features2;   /* additional feature bits */
 241         /*
 242          * bad features2 field as a result of failing to pad the sb
 243          * structure to 64 bits. Some machines will be using this field
 244          * for features2 bits. Easiest just to mark it bad and not use
 245          * it for anything else.
 246          */
 247         __be32          sb_bad_features2;
 248
 249         /* version 5 superblock fields start here */
 250
 251         /* feature masks */
 252         __be32          sb_features_compat;
 253         __be32          sb_features_ro_compat;
 254         __be32          sb_features_incompat;
 255         __be32          sb_features_log_incompat;
 256
 257         __le32          sb_crc;         /* superblock crc */
 258         __be32          sb_pad;
 259
 260         __be64          sb_pquotino;    /* project quota inode */
 261         __be64          sb_lsn;         /* last write sequence */
 262
 263         /* must be padded to 64 bit alignment */
 264 } xfs_dsb_t;
 265
 266 /*
 267  * Sequence number values for the fields.
 268  */
 269 typedef enum {
 270         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 271         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 272         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 273         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 274         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 275         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 276         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 277         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 278         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 279         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 280         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 281         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 282         XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT,
 283         XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT,
 284         XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD,
 285         XFS_SBS_PQUOTINO, XFS_SBS_LSN,
 286         XFS_SBS_FIELDCOUNT
 287 } xfs_sb_field_t;
 288
 289 /*
 290  * Mask values, defined based on the xfs_sb_field_t values.
 291  * Only define the ones we're using.
 292  */
 293 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 294 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 295 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 296 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 297 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 298 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 299 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 300 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 301 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 302 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 303 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 304 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 305 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 306 #define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 307 #define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 308 #define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 309 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 310 #define XFS_SB_BAD_FEATURES2    XFS_SB_MVAL(BAD_FEATURES2)
 311 #define XFS_SB_FEATURES_COMPAT  XFS_SB_MVAL(FEATURES_COMPAT)
 312 #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
 313 #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
 314 #define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
 315 #define XFS_SB_CRC              XFS_SB_MVAL(CRC)
 316 #define XFS_SB_PQUOTINO         XFS_SB_MVAL(PQUOTINO)
 317 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 318 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 319 #define XFS_SB_MOD_BITS         \
 320         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 321          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 322          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 323          XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
 324          XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
 325          XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
 326          XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
 327
 328
 329 /*
 330  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 331  * a feature bit is set when the flag is used.
 332  */
 333 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 334 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 335
 336 /*
 337  * define max. shared version we can interoperate with
 338  */
 339 #define XFS_SB_MAX_SHARED_VN    0
 340
 341 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 342
 343 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 344 {
 345         /* We always support version 1-3 */
 346         if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
 347             sbp->sb_versionnum <= XFS_SB_VERSION_3)
 348                 return 1;
 349
 350         /* We support version 4 if all feature bits are supported */
 351         if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
 352                 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
 353                     ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
 354                      (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
 355                         return 0;
 356
 357 #ifdef __KERNEL__
 358                 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 359                         return 0;
 360 #else
 361                 if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) &&
 362                     sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 363                         return 0;
 364 #endif
 365
 366                 return 1;
 367         }
 368         if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
 369                 return 1;
 370
 371         return 0;
 372 }
 373
 374 /*
 375  * Detect a mismatched features2 field.  Older kernels read/wrote
 376  * this into the wrong slot, so to be safe we keep them in sync.
 377  */
 378 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
 379 {
 380         return (sbp->sb_bad_features2 != sbp->sb_features2);
 381 }
 382
 383 static inline unsigned xfs_sb_version_tonew(unsigned v)
 384 {
 385         if (v == XFS_SB_VERSION_1)
 386                 return XFS_SB_VERSION_4;
 387
 388         if (v == XFS_SB_VERSION_2)
 389                 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 390
 391         return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
 392                 XFS_SB_VERSION_NLINKBIT;
 393 }
 394
 395 static inline unsigned xfs_sb_version_toold(unsigned v)
 396 {
 397         if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
 398                 return 0;
 399         if (v & XFS_SB_VERSION_NLINKBIT)
 400                 return XFS_SB_VERSION_3;
 401         if (v & XFS_SB_VERSION_ATTRBIT)
 402                 return XFS_SB_VERSION_2;
 403         return XFS_SB_VERSION_1;
 404 }
 405
 406 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 407 {
 408         return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
 409                 sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 410                 (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 411                  (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 412 }
 413
 414 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 415 {
 416         if (sbp->sb_versionnum == XFS_SB_VERSION_1)
 417                 sbp->sb_versionnum = XFS_SB_VERSION_2;
 418         else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
 419                 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
 420         else
 421                 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 422 }
 423
 424 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 425 {
 426         return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 427                  (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 428                   (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 429 }
 430
 431 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 432 {
 433         if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
 434                 sbp->sb_versionnum = XFS_SB_VERSION_3;
 435         else
 436                 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
 437 }
 438
 439 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 440 {
 441         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 442                 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 443 }
 444
 445 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 446 {
 447         if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
 448                 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
 449         else
 450                 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
 451                                         XFS_SB_VERSION_QUOTABIT;
 452 }
 453
 454 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 455 {
 456         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 457                (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 458                 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
 459 }
 460
 461 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 462 {
 463         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 464                 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 465 }
 466
 467 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 468 {
 469         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 470                 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 471 }
 472
 473 static inline int xfs_sb_version_hasdirv2(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_DIRV2BIT));
 478 }
 479
 480 static inline int xfs_sb_version_haslogv2(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_LOGV2BIT));
 485 }
 486
 487 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 488 {
 489         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 490                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 491                 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT));
 492 }
 493
 494 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 495 {
 496         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 497                 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 498 }
 499
 500 static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
 501 {
 502         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 503                 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
 504 }
 505
 506 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 507 {
 508         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 509                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 510                 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT));
 511 }
 512
 513 /*
 514  * sb_features2 bit version macros.
 515  *
 516  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 517  *
 518  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 519  *      ((xfs_sb_version_hasmorebits(sbp) &&
 520  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 521  */
 522
 523 static inline int xfs_sb_version_haslazysbcount(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_LAZYSBCOUNTBIT));
 528 }
 529
 530 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 531 {
 532         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 533                (xfs_sb_version_hasmorebits(sbp) &&
 534                 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT));
 535 }
 536
 537 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 538 {
 539         sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
 540         sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
 541 }
 542
 543 static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
 544 {
 545         sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
 546         if (!sbp->sb_features2)
 547                 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
 548 }
 549
 550 static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
 551 {
 552         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 553                (xfs_sb_version_hasmorebits(sbp) &&
 554                 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT));
 555 }
 556
 557 static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
 558 {
 559         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
 560 }
 561
 562
 563 /*
 564  * Extended v5 superblock feature masks. These are to be used for new v5
 565  * superblock features only.
 566  *
 567  * Compat features are new features that old kernels will not notice or affect
 568  * and so can mount read-write without issues.
 569  *
 570  * RO-Compat (read only) are features that old kernels can read but will break
 571  * if they write. Hence only read-only mounts of such filesystems are allowed on
 572  * kernels that don't support the feature bit.
 573  *
 574  * InCompat features are features which old kernels will not understand and so
 575  * must not mount.
 576  *
 577  * Log-InCompat features are for changes to log formats or new transactions that
 578  * can't be replayed on older kernels. The fields are set when the filesystem is
 579  * mounted, and a clean unmount clears the fields.
 580  */
 581 #define XFS_SB_FEAT_COMPAT_ALL 0
 582 #define XFS_SB_FEAT_COMPAT_UNKNOWN      ~XFS_SB_FEAT_COMPAT_ALL
 583 static inline bool
 584 xfs_sb_has_compat_feature(
 585         struct xfs_sb   *sbp,
 586         __uint32_t      feature)
 587 {
 588         return (sbp->sb_features_compat & feature) != 0;
 589 }
 590
 591 #define XFS_SB_FEAT_RO_COMPAT_ALL 0
 592 #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN   ~XFS_SB_FEAT_RO_COMPAT_ALL
 593 static inline bool
 594 xfs_sb_has_ro_compat_feature(
 595         struct xfs_sb   *sbp,
 596         __uint32_t      feature)
 597 {
 598         return (sbp->sb_features_ro_compat & feature) != 0;
 599 }
 600
 601 #define XFS_SB_FEAT_INCOMPAT_ALL 0
 602 #define XFS_SB_FEAT_INCOMPAT_UNKNOWN    ~XFS_SB_FEAT_INCOMPAT_ALL
 603 static inline bool
 604 xfs_sb_has_incompat_feature(
 605         struct xfs_sb   *sbp,
 606         __uint32_t      feature)
 607 {
 608         return (sbp->sb_features_incompat & feature) != 0;
 609 }
 610
 611 #define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
 612 #define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN        ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
 613 static inline bool
 614 xfs_sb_has_incompat_log_feature(
 615         struct xfs_sb   *sbp,
 616         __uint32_t      feature)
 617 {
 618         return (sbp->sb_features_log_incompat & feature) != 0;
 619 }
 620
 621 /*
 622  * end of superblock version macros
 623  */
 624
 625 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 626 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 627 #define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)((bp)->b_addr))
 628
 629 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 630 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 631                         xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
 632 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 633                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 634
 635 /*
 636  * File system sector to basic block conversions.
 637  */
 638 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 639
 640 /*
 641  * File system block to basic block conversions.
 642  */
 643 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 644 #define XFS_BB_TO_FSB(mp,bb)    \
 645         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 646 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 647
 648 /*
 649  * File system block to byte conversions.
 650  */
 651 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 652 #define XFS_B_TO_FSB(mp,b)      \
 653         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 654 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 655 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 656
 657 #endif  /* __XFS_SB_H__ */