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 struct xfs_trans;
  30
  31 #define XFS_SB_MAGIC            0x58465342      /* 'XFSB' */
  32 #define XFS_SB_VERSION_1        1               /* 5.3, 6.0.1, 6.1 */
  33 #define XFS_SB_VERSION_2        2               /* 6.2 - attributes */
  34 #define XFS_SB_VERSION_3        3               /* 6.2 - new inode version */
  35 #define XFS_SB_VERSION_4        4               /* 6.2+ - bitmask version */
  36 #define XFS_SB_VERSION_5        5               /* CRC enabled filesystem */
  37 #define XFS_SB_VERSION_NUMBITS          0x000f
  38 #define XFS_SB_VERSION_ALLFBITS         0xfff0
  39 #define XFS_SB_VERSION_SASHFBITS        0xf000
  40 #define XFS_SB_VERSION_REALFBITS        0x0ff0
  41 #define XFS_SB_VERSION_ATTRBIT          0x0010
  42 #define XFS_SB_VERSION_NLINKBIT         0x0020
  43 #define XFS_SB_VERSION_QUOTABIT         0x0040
  44 #define XFS_SB_VERSION_ALIGNBIT         0x0080
  45 #define XFS_SB_VERSION_DALIGNBIT        0x0100
  46 #define XFS_SB_VERSION_SHAREDBIT        0x0200
  47 #define XFS_SB_VERSION_LOGV2BIT         0x0400
  48 #define XFS_SB_VERSION_SECTORBIT        0x0800
  49 #define XFS_SB_VERSION_EXTFLGBIT        0x1000
  50 #define XFS_SB_VERSION_DIRV2BIT         0x2000
  51 #define XFS_SB_VERSION_BORGBIT          0x4000  /* ASCII only case-insens. */
  52 #define XFS_SB_VERSION_MOREBITSBIT      0x8000
  53 #define XFS_SB_VERSION_OKSASHFBITS      \
  54         (XFS_SB_VERSION_EXTFLGBIT | \
  55          XFS_SB_VERSION_DIRV2BIT | \
  56          XFS_SB_VERSION_BORGBIT)
  57 #define XFS_SB_VERSION_OKREALFBITS      \
  58         (XFS_SB_VERSION_ATTRBIT | \
  59          XFS_SB_VERSION_NLINKBIT | \
  60          XFS_SB_VERSION_QUOTABIT | \
  61          XFS_SB_VERSION_ALIGNBIT | \
  62          XFS_SB_VERSION_DALIGNBIT | \
  63          XFS_SB_VERSION_SHAREDBIT | \
  64          XFS_SB_VERSION_LOGV2BIT | \
  65          XFS_SB_VERSION_SECTORBIT | \
  66          XFS_SB_VERSION_MOREBITSBIT)
  67 #define XFS_SB_VERSION_OKREALBITS       \
  68         (XFS_SB_VERSION_NUMBITS | \
  69          XFS_SB_VERSION_OKREALFBITS | \
  70          XFS_SB_VERSION_OKSASHFBITS)
  71
  72 /*
  73  * There are two words to hold XFS "feature" bits: the original
  74  * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
  75  * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
  76  *
  77  * These defines represent bits in sb_features2.
  78  */
  79 #define XFS_SB_VERSION2_REALFBITS       0x00ffffff      /* Mask: features */
  80 #define XFS_SB_VERSION2_RESERVED1BIT    0x00000001
  81 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT  0x00000002      /* Superblk counters */
  82 #define XFS_SB_VERSION2_RESERVED4BIT    0x00000004
  83 #define XFS_SB_VERSION2_ATTR2BIT        0x00000008      /* Inline attr rework */
  84 #define XFS_SB_VERSION2_PARENTBIT       0x00000010      /* parent pointers */
  85 #define XFS_SB_VERSION2_PROJID32BIT     0x00000080      /* 32 bit project id */
  86 #define XFS_SB_VERSION2_CRCBIT          0x00000100      /* metadata CRCs */
  87 #define XFS_SB_VERSION2_FTYPE           0x00000200      /* inode type in dir */
  88
  89 #define XFS_SB_VERSION2_OKREALFBITS     \
  90         (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
  91          XFS_SB_VERSION2_ATTR2BIT       | \
  92          XFS_SB_VERSION2_PROJID32BIT    | \
  93          XFS_SB_VERSION2_FTYPE)
  94 #define XFS_SB_VERSION2_OKSASHFBITS     \
  95         (0)
  96 #define XFS_SB_VERSION2_OKREALBITS      \
  97         (XFS_SB_VERSION2_OKREALFBITS |  \
  98          XFS_SB_VERSION2_OKSASHFBITS )
  99
 100 /*
 101  * Superblock - in core version.  Must match the ondisk version below.
 102  * Must be padded to 64 bit alignment.
 103  */
 104 typedef struct xfs_sb {
 105         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 106         __uint32_t      sb_blocksize;   /* logical block size, bytes */
 107         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
 108         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
 109         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 110         uuid_t          sb_uuid;        /* file system unique id */
 111         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 112         xfs_ino_t       sb_rootino;     /* root inode number */
 113         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 114         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 115         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 116         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 117         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 118         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 119         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 120         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 121         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 122         __uint16_t      sb_inodesize;   /* inode size, bytes */
 123         __uint16_t      sb_inopblock;   /* inodes per block */
 124         char            sb_fname[12];   /* file system name */
 125         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 126         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 127         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 128         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 129         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 130         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 131         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 132         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 133                                         /* statistics */
 134         /*
 135          * These fields must remain contiguous.  If you really
 136          * want to change their layout, make sure you fix the
 137          * code in xfs_trans_apply_sb_deltas().
 138          */
 139         __uint64_t      sb_icount;      /* allocated inodes */
 140         __uint64_t      sb_ifree;       /* free inodes */
 141         __uint64_t      sb_fdblocks;    /* free data blocks */
 142         __uint64_t      sb_frextents;   /* free realtime extents */
 143         /*
 144          * End contiguous fields.
 145          */
 146         xfs_ino_t       sb_uquotino;    /* user quota inode */
 147         xfs_ino_t       sb_gquotino;    /* group quota inode */
 148         __uint16_t      sb_qflags;      /* quota flags */
 149         __uint8_t       sb_flags;       /* misc. flags */
 150         __uint8_t       sb_shared_vn;   /* shared version number */
 151         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 152         __uint32_t      sb_unit;        /* stripe or raid unit */
 153         __uint32_t      sb_width;       /* stripe or raid width */
 154         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 155         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 156         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 157         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 158         __uint32_t      sb_features2;   /* additional feature bits */
 159
 160         /*
 161          * bad features2 field as a result of failing to pad the sb
 162          * structure to 64 bits. Some machines will be using this field
 163          * for features2 bits. Easiest just to mark it bad and not use
 164          * it for anything else.
 165          */
 166         __uint32_t      sb_bad_features2;
 167
 168         /* version 5 superblock fields start here */
 169
 170         /* feature masks */
 171         __uint32_t      sb_features_compat;
 172         __uint32_t      sb_features_ro_compat;
 173         __uint32_t      sb_features_incompat;
 174         __uint32_t      sb_features_log_incompat;
 175
 176         __uint32_t      sb_crc;         /* superblock crc */
 177         __uint32_t      sb_pad;
 178
 179         xfs_ino_t       sb_pquotino;    /* project quota inode */
 180         xfs_lsn_t       sb_lsn;         /* last write sequence */
 181
 182         /* must be padded to 64 bit alignment */
 183 } xfs_sb_t;
 184
 185 /*
 186  * Superblock - on disk version.  Must match the in core version above.
 187  * Must be padded to 64 bit alignment.
 188  */
 189 typedef struct xfs_dsb {
 190         __be32          sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 191         __be32          sb_blocksize;   /* logical block size, bytes */
 192         __be64          sb_dblocks;     /* number of data blocks */
 193         __be64          sb_rblocks;     /* number of realtime blocks */
 194         __be64          sb_rextents;    /* number of realtime extents */
 195         uuid_t          sb_uuid;        /* file system unique id */
 196         __be64          sb_logstart;    /* starting block of log if internal */
 197         __be64          sb_rootino;     /* root inode number */
 198         __be64          sb_rbmino;      /* bitmap inode for realtime extents */
 199         __be64          sb_rsumino;     /* summary inode for rt bitmap */
 200         __be32          sb_rextsize;    /* realtime extent size, blocks */
 201         __be32          sb_agblocks;    /* size of an allocation group */
 202         __be32          sb_agcount;     /* number of allocation groups */
 203         __be32          sb_rbmblocks;   /* number of rt bitmap blocks */
 204         __be32          sb_logblocks;   /* number of log blocks */
 205         __be16          sb_versionnum;  /* header version == XFS_SB_VERSION */
 206         __be16          sb_sectsize;    /* volume sector size, bytes */
 207         __be16          sb_inodesize;   /* inode size, bytes */
 208         __be16          sb_inopblock;   /* inodes per block */
 209         char            sb_fname[12];   /* file system name */
 210         __u8            sb_blocklog;    /* log2 of sb_blocksize */
 211         __u8            sb_sectlog;     /* log2 of sb_sectsize */
 212         __u8            sb_inodelog;    /* log2 of sb_inodesize */
 213         __u8            sb_inopblog;    /* log2 of sb_inopblock */
 214         __u8            sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 215         __u8            sb_rextslog;    /* log2 of sb_rextents */
 216         __u8            sb_inprogress;  /* mkfs is in progress, don't mount */
 217         __u8            sb_imax_pct;    /* max % of fs for inode space */
 218                                         /* statistics */
 219         /*
 220          * These fields must remain contiguous.  If you really
 221          * want to change their layout, make sure you fix the
 222          * code in xfs_trans_apply_sb_deltas().
 223          */
 224         __be64          sb_icount;      /* allocated inodes */
 225         __be64          sb_ifree;       /* free inodes */
 226         __be64          sb_fdblocks;    /* free data blocks */
 227         __be64          sb_frextents;   /* free realtime extents */
 228         /*
 229          * End contiguous fields.
 230          */
 231         __be64          sb_uquotino;    /* user quota inode */
 232         __be64          sb_gquotino;    /* group quota inode */
 233         __be16          sb_qflags;      /* quota flags */
 234         __u8            sb_flags;       /* misc. flags */
 235         __u8            sb_shared_vn;   /* shared version number */
 236         __be32          sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 237         __be32          sb_unit;        /* stripe or raid unit */
 238         __be32          sb_width;       /* stripe or raid width */
 239         __u8            sb_dirblklog;   /* log2 of dir block size (fsbs) */
 240         __u8            sb_logsectlog;  /* log2 of the log sector size */
 241         __be16          sb_logsectsize; /* sector size for the log, bytes */
 242         __be32          sb_logsunit;    /* stripe unit size for the log */
 243         __be32          sb_features2;   /* additional feature bits */
 244         /*
 245          * bad features2 field as a result of failing to pad the sb
 246          * structure to 64 bits. Some machines will be using this field
 247          * for features2 bits. Easiest just to mark it bad and not use
 248          * it for anything else.
 249          */
 250         __be32          sb_bad_features2;
 251
 252         /* version 5 superblock fields start here */
 253
 254         /* feature masks */
 255         __be32          sb_features_compat;
 256         __be32          sb_features_ro_compat;
 257         __be32          sb_features_incompat;
 258         __be32          sb_features_log_incompat;
 259
 260         __le32          sb_crc;         /* superblock crc */
 261         __be32          sb_pad;
 262
 263         __be64          sb_pquotino;    /* project quota inode */
 264         __be64          sb_lsn;         /* last write sequence */
 265
 266         /* must be padded to 64 bit alignment */
 267 } xfs_dsb_t;
 268
 269 /*
 270  * Sequence number values for the fields.
 271  */
 272 typedef enum {
 273         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 274         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 275         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 276         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 277         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 278         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 279         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 280         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 281         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 282         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 283         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 284         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 285         XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT,
 286         XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT,
 287         XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD,
 288         XFS_SBS_PQUOTINO, XFS_SBS_LSN,
 289         XFS_SBS_FIELDCOUNT
 290 } xfs_sb_field_t;
 291
 292 /*
 293  * Mask values, defined based on the xfs_sb_field_t values.
 294  * Only define the ones we're using.
 295  */
 296 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 297 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 298 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 299 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 300 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 301 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 302 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 303 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 304 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 305 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 306 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 307 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 308 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 309 #define XFS_SB_ICOUNT           XFS_SB_MVAL(ICOUNT)
 310 #define XFS_SB_IFREE            XFS_SB_MVAL(IFREE)
 311 #define XFS_SB_FDBLOCKS         XFS_SB_MVAL(FDBLOCKS)
 312 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 313 #define XFS_SB_BAD_FEATURES2    XFS_SB_MVAL(BAD_FEATURES2)
 314 #define XFS_SB_FEATURES_COMPAT  XFS_SB_MVAL(FEATURES_COMPAT)
 315 #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
 316 #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
 317 #define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
 318 #define XFS_SB_CRC              XFS_SB_MVAL(CRC)
 319 #define XFS_SB_PQUOTINO         XFS_SB_MVAL(PQUOTINO)
 320 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 321 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 322 #define XFS_SB_MOD_BITS         \
 323         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 324          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 325          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 326          XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
 327          XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
 328          XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
 329          XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
 330
 331
 332 /*
 333  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 334  * a feature bit is set when the flag is used.
 335  */
 336 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 337 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 338
 339 /*
 340  * define max. shared version we can interoperate with
 341  */
 342 #define XFS_SB_MAX_SHARED_VN    0
 343
 344 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 345
 346 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 347 {
 348         /* We always support version 1-3 */
 349         if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
 350             sbp->sb_versionnum <= XFS_SB_VERSION_3)
 351                 return 1;
 352
 353         /* We support version 4 if all feature bits are supported */
 354         if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
 355                 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
 356                     ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
 357                      (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
 358                         return 0;
 359
 360                 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
 361                         return 0;
 362                 return 1;
 363         }
 364         if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
 365                 return 1;
 366
 367         return 0;
 368 }
 369
 370 /*
 371  * Detect a mismatched features2 field.  Older kernels read/wrote
 372  * this into the wrong slot, so to be safe we keep them in sync.
 373  */
 374 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
 375 {
 376         return (sbp->sb_bad_features2 != sbp->sb_features2);
 377 }
 378
 379 static inline unsigned xfs_sb_version_tonew(unsigned v)
 380 {
 381         if (v == XFS_SB_VERSION_1)
 382                 return XFS_SB_VERSION_4;
 383
 384         if (v == XFS_SB_VERSION_2)
 385                 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 386
 387         return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
 388                 XFS_SB_VERSION_NLINKBIT;
 389 }
 390
 391 static inline unsigned xfs_sb_version_toold(unsigned v)
 392 {
 393         if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
 394                 return 0;
 395         if (v & XFS_SB_VERSION_NLINKBIT)
 396                 return XFS_SB_VERSION_3;
 397         if (v & XFS_SB_VERSION_ATTRBIT)
 398                 return XFS_SB_VERSION_2;
 399         return XFS_SB_VERSION_1;
 400 }
 401
 402 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 403 {
 404         return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
 405                 sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 406                 (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 407                  (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 408 }
 409
 410 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 411 {
 412         if (sbp->sb_versionnum == XFS_SB_VERSION_1)
 413                 sbp->sb_versionnum = XFS_SB_VERSION_2;
 414         else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
 415                 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
 416         else
 417                 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
 418 }
 419
 420 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 421 {
 422         return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
 423                  (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 424                   (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 425 }
 426
 427 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 428 {
 429         if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
 430                 sbp->sb_versionnum = XFS_SB_VERSION_3;
 431         else
 432                 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
 433 }
 434
 435 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 436 {
 437         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 438                 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 439 }
 440
 441 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 442 {
 443         if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
 444                 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
 445         else
 446                 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
 447                                         XFS_SB_VERSION_QUOTABIT;
 448 }
 449
 450 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 451 {
 452         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 453                (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 454                 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
 455 }
 456
 457 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 458 {
 459         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 460                 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 461 }
 462
 463 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 464 {
 465         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 466                 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 467 }
 468
 469 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 470 {
 471         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 472                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 473                 (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT));
 474 }
 475
 476 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 477 {
 478         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 479                (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 480                 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT));
 481 }
 482
 483 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 484 {
 485         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 486                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 487                 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT));
 488 }
 489
 490 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 491 {
 492         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 493                 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 494 }
 495
 496 static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
 497 {
 498         return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
 499                 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
 500 }
 501
 502 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 503 {
 504         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 505                (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
 506                 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT));
 507 }
 508
 509 /*
 510  * sb_features2 bit version macros.
 511  *
 512  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 513  *
 514  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 515  *      ((xfs_sb_version_hasmorebits(sbp) &&
 516  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 517  */
 518
 519 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
 520 {
 521         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 522                (xfs_sb_version_hasmorebits(sbp) &&
 523                 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
 524 }
 525
 526 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 527 {
 528         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 529                (xfs_sb_version_hasmorebits(sbp) &&
 530                 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT));
 531 }
 532
 533 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 534 {
 535         sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
 536         sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
 537 }
 538
 539 static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
 540 {
 541         sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
 542         if (!sbp->sb_features2)
 543                 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
 544 }
 545
 546 static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
 547 {
 548         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
 549                (xfs_sb_version_hasmorebits(sbp) &&
 550                 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT));
 551 }
 552
 553 static inline void xfs_sb_version_addprojid32bit(xfs_sb_t *sbp)
 554 {
 555         sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
 556         sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT;
 557         sbp->sb_bad_features2 |= XFS_SB_VERSION2_PROJID32BIT;
 558 }
 559
 560 /*
 561  * Extended v5 superblock feature masks. These are to be used for new v5
 562  * superblock features only.
 563  *
 564  * Compat features are new features that old kernels will not notice or affect
 565  * and so can mount read-write without issues.
 566  *
 567  * RO-Compat (read only) are features that old kernels can read but will break
 568  * if they write. Hence only read-only mounts of such filesystems are allowed on
 569  * kernels that don't support the feature bit.
 570  *
 571  * InCompat features are features which old kernels will not understand and so
 572  * must not mount.
 573  *
 574  * Log-InCompat features are for changes to log formats or new transactions that
 575  * can't be replayed on older kernels. The fields are set when the filesystem is
 576  * mounted, and a clean unmount clears the fields.
 577  */
 578 #define XFS_SB_FEAT_COMPAT_ALL 0
 579 #define XFS_SB_FEAT_COMPAT_UNKNOWN      ~XFS_SB_FEAT_COMPAT_ALL
 580 static inline bool
 581 xfs_sb_has_compat_feature(
 582         struct xfs_sb   *sbp,
 583         __uint32_t      feature)
 584 {
 585         return (sbp->sb_features_compat & feature) != 0;
 586 }
 587
 588 #define XFS_SB_FEAT_RO_COMPAT_ALL 0
 589 #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN   ~XFS_SB_FEAT_RO_COMPAT_ALL
 590 static inline bool
 591 xfs_sb_has_ro_compat_feature(
 592         struct xfs_sb   *sbp,
 593         __uint32_t      feature)
 594 {
 595         return (sbp->sb_features_ro_compat & feature) != 0;
 596 }
 597
 598 #define XFS_SB_FEAT_INCOMPAT_FTYPE      (1 << 0)        /* filetype in dirent */
 599 #define XFS_SB_FEAT_INCOMPAT_ALL \
 600                 (XFS_SB_FEAT_INCOMPAT_FTYPE)
 601
 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  * V5 superblock specific feature checks
 623  */
 624 static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
 625 {
 626         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
 627 }
 628
 629 static inline int xfs_sb_version_has_pquotino(xfs_sb_t *sbp)
 630 {
 631         return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
 632 }
 633
 634 static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp)
 635 {
 636         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
 637                 xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) ||
 638                (xfs_sb_version_hasmorebits(sbp) &&
 639                  (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE));
 640 }
 641
 642 /*
 643  * end of superblock version macros
 644  */
 645
 646 static inline bool
 647 xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino)
 648 {
 649         return (ino == sbp->sb_uquotino ||
 650                 ino == sbp->sb_gquotino ||
 651                 ino == sbp->sb_pquotino);
 652 }
 653
 654 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 655 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 656 #define XFS_BUF_TO_SBP(bp)      ((xfs_dsb_t *)((bp)->b_addr))
 657
 658 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 659 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 660                         xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
 661 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 662                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 663
 664 /*
 665  * File system sector to basic block conversions.
 666  */
 667 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 668
 669 /*
 670  * File system block to basic block conversions.
 671  */
 672 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 673 #define XFS_BB_TO_FSB(mp,bb)    \
 674         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 675 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 676
 677 /*
 678  * File system block to byte conversions.
 679  */
 680 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 681 #define XFS_B_TO_FSB(mp,b)      \
 682         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 683 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 684 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 685
 686 /*
 687  * perag get/put wrappers for ref counting
 688  */
 689 extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
 690 extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
 691                                            int tag);
 692 extern void     xfs_perag_put(struct xfs_perag *pag);
 693 extern int      xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
 694
 695 extern void     xfs_sb_calc_crc(struct xfs_buf  *);
 696 extern void     xfs_mod_sb(struct xfs_trans *, __int64_t);
 697 extern void     xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *);
 698 extern void     xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
 699 extern void     xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 700 extern void     xfs_sb_quota_from_disk(struct xfs_sb *sbp);
 701
 702 #endif  /* __XFS_SB_H__ */