fs/xfs/xfs_sb.h

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32 #ifndef __XFS_SB_H__
  33 #define __XFS_SB_H__
  34
  35 /*
  36  * Super block
  37  * Fits into a sector-sized buffer at address 0 of each allocation group.
  38  * Only the first of these is ever updated except during growfs.
  39  */
  40
  41 struct xfs_buf;
  42 struct xfs_mount;
  43
  44 #define XFS_SB_MAGIC            0x58465342      /* 'XFSB' */
  45 #define XFS_SB_VERSION_1        1               /* 5.3, 6.0.1, 6.1 */
  46 #define XFS_SB_VERSION_2        2               /* 6.2 - attributes */
  47 #define XFS_SB_VERSION_3        3               /* 6.2 - new inode version */
  48 #define XFS_SB_VERSION_4        4               /* 6.2+ - bitmask version */
  49 #define XFS_SB_VERSION_NUMBITS          0x000f
  50 #define XFS_SB_VERSION_ALLFBITS         0xfff0
  51 #define XFS_SB_VERSION_SASHFBITS        0xf000
  52 #define XFS_SB_VERSION_REALFBITS        0x0ff0
  53 #define XFS_SB_VERSION_ATTRBIT          0x0010
  54 #define XFS_SB_VERSION_NLINKBIT         0x0020
  55 #define XFS_SB_VERSION_QUOTABIT         0x0040
  56 #define XFS_SB_VERSION_ALIGNBIT         0x0080
  57 #define XFS_SB_VERSION_DALIGNBIT        0x0100
  58 #define XFS_SB_VERSION_SHAREDBIT        0x0200
  59 #define XFS_SB_VERSION_LOGV2BIT         0x0400
  60 #define XFS_SB_VERSION_SECTORBIT        0x0800
  61 #define XFS_SB_VERSION_EXTFLGBIT        0x1000
  62 #define XFS_SB_VERSION_DIRV2BIT         0x2000
  63 #define XFS_SB_VERSION_MOREBITSBIT      0x8000
  64 #define XFS_SB_VERSION_OKSASHFBITS      \
  65         (XFS_SB_VERSION_EXTFLGBIT | \
  66          XFS_SB_VERSION_DIRV2BIT)
  67 #define XFS_SB_VERSION_OKREALFBITS      \
  68         (XFS_SB_VERSION_ATTRBIT | \
  69          XFS_SB_VERSION_NLINKBIT | \
  70          XFS_SB_VERSION_QUOTABIT | \
  71          XFS_SB_VERSION_ALIGNBIT | \
  72          XFS_SB_VERSION_DALIGNBIT | \
  73          XFS_SB_VERSION_SHAREDBIT | \
  74          XFS_SB_VERSION_LOGV2BIT | \
  75          XFS_SB_VERSION_SECTORBIT | \
  76          XFS_SB_VERSION_MOREBITSBIT)
  77 #define XFS_SB_VERSION_OKSASHBITS       \
  78         (XFS_SB_VERSION_NUMBITS | \
  79          XFS_SB_VERSION_REALFBITS | \
  80          XFS_SB_VERSION_OKSASHFBITS)
  81 #define XFS_SB_VERSION_OKREALBITS       \
  82         (XFS_SB_VERSION_NUMBITS | \
  83          XFS_SB_VERSION_OKREALFBITS | \
  84          XFS_SB_VERSION_OKSASHFBITS)
  85 #define XFS_SB_VERSION_MKFS(ia,dia,extflag,dirv2,na,sflag,morebits)     \
  86         (((ia) || (dia) || (extflag) || (dirv2) || (na) || (sflag) || \
  87           (morebits)) ? \
  88                 (XFS_SB_VERSION_4 | \
  89                  ((ia) ? XFS_SB_VERSION_ALIGNBIT : 0) | \
  90                  ((dia) ? XFS_SB_VERSION_DALIGNBIT : 0) | \
  91                  ((extflag) ? XFS_SB_VERSION_EXTFLGBIT : 0) | \
  92                  ((dirv2) ? XFS_SB_VERSION_DIRV2BIT : 0) | \
  93                  ((na) ? XFS_SB_VERSION_LOGV2BIT : 0) | \
  94                  ((sflag) ? XFS_SB_VERSION_SECTORBIT : 0) | \
  95                  ((morebits) ? XFS_SB_VERSION_MOREBITSBIT : 0)) : \
  96                 XFS_SB_VERSION_1)
  97
  98 /*
  99  * There are two words to hold XFS "feature" bits: the original
 100  * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
 101  * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
 102  *
 103  * These defines represent bits in sb_features2.
 104  */
 105 #define XFS_SB_VERSION2_REALFBITS       0x00ffffff      /* Mask: features */
 106 #define XFS_SB_VERSION2_RESERVED1BIT    0x00000001
 107 #define XFS_SB_VERSION2_RESERVED2BIT    0x00000002
 108 #define XFS_SB_VERSION2_RESERVED4BIT    0x00000004
 109 #define XFS_SB_VERSION2_ATTR2BIT        0x00000008      /* Inline attr rework */
 110 #define XFS_SB_VERSION2_SASHFBITS       0xff000000      /* Mask: features that
 111                                                            require changing
 112                                                            PROM and SASH */
 113
 114 #define XFS_SB_VERSION2_OKREALFBITS     \
 115         (XFS_SB_VERSION2_ATTR2BIT)
 116 #define XFS_SB_VERSION2_OKSASHFBITS     \
 117         (0)
 118 #define XFS_SB_VERSION2_OKREALBITS      \
 119         (XFS_SB_VERSION2_OKREALFBITS |  \
 120          XFS_SB_VERSION2_OKSASHFBITS )
 121
 122 /*
 123  * mkfs macro to set up sb_features2 word
 124  */
 125 #define XFS_SB_VERSION2_MKFS(resvd1, sbcntr)    0
 126
 127 typedef struct xfs_sb
 128 {
 129         __uint32_t      sb_magicnum;    /* magic number == XFS_SB_MAGIC */
 130         __uint32_t      sb_blocksize;   /* logical block size, bytes */
 131         xfs_drfsbno_t   sb_dblocks;     /* number of data blocks */
 132         xfs_drfsbno_t   sb_rblocks;     /* number of realtime blocks */
 133         xfs_drtbno_t    sb_rextents;    /* number of realtime extents */
 134         uuid_t          sb_uuid;        /* file system unique id */
 135         xfs_dfsbno_t    sb_logstart;    /* starting block of log if internal */
 136         xfs_ino_t       sb_rootino;     /* root inode number */
 137         xfs_ino_t       sb_rbmino;      /* bitmap inode for realtime extents */
 138         xfs_ino_t       sb_rsumino;     /* summary inode for rt bitmap */
 139         xfs_agblock_t   sb_rextsize;    /* realtime extent size, blocks */
 140         xfs_agblock_t   sb_agblocks;    /* size of an allocation group */
 141         xfs_agnumber_t  sb_agcount;     /* number of allocation groups */
 142         xfs_extlen_t    sb_rbmblocks;   /* number of rt bitmap blocks */
 143         xfs_extlen_t    sb_logblocks;   /* number of log blocks */
 144         __uint16_t      sb_versionnum;  /* header version == XFS_SB_VERSION */
 145         __uint16_t      sb_sectsize;    /* volume sector size, bytes */
 146         __uint16_t      sb_inodesize;   /* inode size, bytes */
 147         __uint16_t      sb_inopblock;   /* inodes per block */
 148         char            sb_fname[12];   /* file system name */
 149         __uint8_t       sb_blocklog;    /* log2 of sb_blocksize */
 150         __uint8_t       sb_sectlog;     /* log2 of sb_sectsize */
 151         __uint8_t       sb_inodelog;    /* log2 of sb_inodesize */
 152         __uint8_t       sb_inopblog;    /* log2 of sb_inopblock */
 153         __uint8_t       sb_agblklog;    /* log2 of sb_agblocks (rounded up) */
 154         __uint8_t       sb_rextslog;    /* log2 of sb_rextents */
 155         __uint8_t       sb_inprogress;  /* mkfs is in progress, don't mount */
 156         __uint8_t       sb_imax_pct;    /* max % of fs for inode space */
 157                                         /* statistics */
 158         /*
 159          * These fields must remain contiguous.  If you really
 160          * want to change their layout, make sure you fix the
 161          * code in xfs_trans_apply_sb_deltas().
 162          */
 163         __uint64_t      sb_icount;      /* allocated inodes */
 164         __uint64_t      sb_ifree;       /* free inodes */
 165         __uint64_t      sb_fdblocks;    /* free data blocks */
 166         __uint64_t      sb_frextents;   /* free realtime extents */
 167         /*
 168          * End contiguous fields.
 169          */
 170         xfs_ino_t       sb_uquotino;    /* user quota inode */
 171         xfs_ino_t       sb_gquotino;    /* group quota inode */
 172         __uint16_t      sb_qflags;      /* quota flags */
 173         __uint8_t       sb_flags;       /* misc. flags */
 174         __uint8_t       sb_shared_vn;   /* shared version number */
 175         xfs_extlen_t    sb_inoalignmt;  /* inode chunk alignment, fsblocks */
 176         __uint32_t      sb_unit;        /* stripe or raid unit */
 177         __uint32_t      sb_width;       /* stripe or raid width */
 178         __uint8_t       sb_dirblklog;   /* log2 of dir block size (fsbs) */
 179         __uint8_t       sb_logsectlog;  /* log2 of the log sector size */
 180         __uint16_t      sb_logsectsize; /* sector size for the log, bytes */
 181         __uint32_t      sb_logsunit;    /* stripe unit size for the log */
 182         __uint32_t      sb_features2;   /* additional feature bits */
 183 } xfs_sb_t;
 184
 185 /*
 186  * Sequence number values for the fields.
 187  */
 188 typedef enum {
 189         XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
 190         XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
 191         XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
 192         XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
 193         XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
 194         XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
 195         XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
 196         XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
 197         XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
 198         XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
 199         XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
 200         XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
 201         XFS_SBS_FEATURES2,
 202         XFS_SBS_FIELDCOUNT
 203 } xfs_sb_field_t;
 204
 205 /*
 206  * Mask values, defined based on the xfs_sb_field_t values.
 207  * Only define the ones we're using.
 208  */
 209 #define XFS_SB_MVAL(x)          (1LL << XFS_SBS_ ## x)
 210 #define XFS_SB_UUID             XFS_SB_MVAL(UUID)
 211 #define XFS_SB_FNAME            XFS_SB_MVAL(FNAME)
 212 #define XFS_SB_ROOTINO          XFS_SB_MVAL(ROOTINO)
 213 #define XFS_SB_RBMINO           XFS_SB_MVAL(RBMINO)
 214 #define XFS_SB_RSUMINO          XFS_SB_MVAL(RSUMINO)
 215 #define XFS_SB_VERSIONNUM       XFS_SB_MVAL(VERSIONNUM)
 216 #define XFS_SB_UQUOTINO         XFS_SB_MVAL(UQUOTINO)
 217 #define XFS_SB_GQUOTINO         XFS_SB_MVAL(GQUOTINO)
 218 #define XFS_SB_QFLAGS           XFS_SB_MVAL(QFLAGS)
 219 #define XFS_SB_SHARED_VN        XFS_SB_MVAL(SHARED_VN)
 220 #define XFS_SB_UNIT             XFS_SB_MVAL(UNIT)
 221 #define XFS_SB_WIDTH            XFS_SB_MVAL(WIDTH)
 222 #define XFS_SB_FEATURES2        XFS_SB_MVAL(FEATURES2)
 223 #define XFS_SB_NUM_BITS         ((int)XFS_SBS_FIELDCOUNT)
 224 #define XFS_SB_ALL_BITS         ((1LL << XFS_SB_NUM_BITS) - 1)
 225 #define XFS_SB_MOD_BITS         \
 226         (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 227          XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 228          XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
 229          XFS_SB_FEATURES2)
 230
 231
 232 /*
 233  * Misc. Flags - warning - these will be cleared by xfs_repair unless
 234  * a feature bit is set when the flag is used.
 235  */
 236 #define XFS_SBF_NOFLAGS         0x00    /* no flags set */
 237 #define XFS_SBF_READONLY        0x01    /* only read-only mounts allowed */
 238
 239 /*
 240  * define max. shared version we can interoperate with
 241  */
 242 #define XFS_SB_MAX_SHARED_VN    0
 243
 244 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
 245
 246 #define XFS_SB_GOOD_VERSION(sbp)        xfs_sb_good_version(sbp)
 247 #ifdef __KERNEL__
 248 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 249 {
 250         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 251                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 252                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 253                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 254                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 255                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 256                     (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
 257 }
 258 #else
 259 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
 260 {
 261         return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
 262                   (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
 263                    ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 264                     !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
 265                       ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
 266                        (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
 267                   (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
 268                    (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
 269 }
 270 #endif /* __KERNEL__ */
 271
 272 #define XFS_SB_GOOD_SASH_VERSION(sbp)   \
 273         ((((sbp)->sb_versionnum >= XFS_SB_VERSION_1) && \
 274           ((sbp)->sb_versionnum <= XFS_SB_VERSION_3)) || \
 275          ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 276           !((sbp)->sb_versionnum & ~XFS_SB_VERSION_OKSASHBITS)))
 277
 278 #define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
 279 static inline unsigned xfs_sb_version_tonew(unsigned v)
 280 {
 281         return ((((v) == XFS_SB_VERSION_1) ? \
 282                 0 : \
 283                 (((v) == XFS_SB_VERSION_2) ? \
 284                         XFS_SB_VERSION_ATTRBIT : \
 285                         (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
 286                 XFS_SB_VERSION_4);
 287 }
 288
 289 #define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
 290 static inline unsigned xfs_sb_version_toold(unsigned v)
 291 {
 292         return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
 293                 0 : \
 294                 (((v) & XFS_SB_VERSION_NLINKBIT) ? \
 295                         XFS_SB_VERSION_3 : \
 296                         (((v) & XFS_SB_VERSION_ATTRBIT) ?  \
 297                                 XFS_SB_VERSION_2 : \
 298                                 XFS_SB_VERSION_1)));
 299 }
 300
 301 #define XFS_SB_VERSION_HASATTR(sbp)     xfs_sb_version_hasattr(sbp)
 302 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
 303 {
 304         return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
 305                  ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 306                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 307                   ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
 308 }
 309
 310 #define XFS_SB_VERSION_ADDATTR(sbp)     xfs_sb_version_addattr(sbp)
 311 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
 312 {
 313         (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
 314                 XFS_SB_VERSION_2 : \
 315                 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
 316                         ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
 317                         (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
 318 }
 319
 320 #define XFS_SB_VERSION_HASNLINK(sbp)    xfs_sb_version_hasnlink(sbp)
 321 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
 322 {
 323         return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
 324                  ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 325                   ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
 326 }
 327
 328 #define XFS_SB_VERSION_ADDNLINK(sbp)    xfs_sb_version_addnlink(sbp)
 329 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
 330 {
 331         (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
 332                 XFS_SB_VERSION_3 : \
 333                 ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
 334 }
 335
 336 #define XFS_SB_VERSION_HASQUOTA(sbp)    xfs_sb_version_hasquota(sbp)
 337 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
 338 {
 339         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 340                 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
 341 }
 342
 343 #define XFS_SB_VERSION_ADDQUOTA(sbp)    xfs_sb_version_addquota(sbp)
 344 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
 345 {
 346         (sbp)->sb_versionnum = \
 347                  (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
 348                         ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
 349                         (XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
 350                          XFS_SB_VERSION_QUOTABIT));
 351 }
 352
 353 #define XFS_SB_VERSION_HASALIGN(sbp)    xfs_sb_version_hasalign(sbp)
 354 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
 355 {
 356         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 357                 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
 358 }
 359
 360 #define XFS_SB_VERSION_SUBALIGN(sbp)    xfs_sb_version_subalign(sbp)
 361 static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
 362 {
 363         (sbp)->sb_versionnum = \
 364          XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
 365 }
 366
 367 #define XFS_SB_VERSION_HASDALIGN(sbp)   xfs_sb_version_hasdalign(sbp)
 368 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
 369 {
 370         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 371                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
 372 }
 373
 374 #define XFS_SB_VERSION_ADDDALIGN(sbp)   xfs_sb_version_adddalign(sbp)
 375 static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
 376 {
 377         return (sbp)->sb_versionnum = \
 378                 ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
 379 }
 380
 381 #define XFS_SB_VERSION_HASSHARED(sbp)   xfs_sb_version_hasshared(sbp)
 382 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
 383 {
 384         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 385                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
 386 }
 387
 388 #define XFS_SB_VERSION_ADDSHARED(sbp)   xfs_sb_version_addshared(sbp)
 389 static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
 390 {
 391         return (sbp)->sb_versionnum = \
 392                 ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
 393 }
 394
 395 #define XFS_SB_VERSION_SUBSHARED(sbp)   xfs_sb_version_subshared(sbp)
 396 static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
 397 {
 398         return (sbp)->sb_versionnum = \
 399                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
 400 }
 401
 402 #define XFS_SB_VERSION_HASDIRV2(sbp)    xfs_sb_version_hasdirv2(sbp)
 403 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
 404 {
 405         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 406                 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
 407 }
 408
 409 #define XFS_SB_VERSION_HASLOGV2(sbp)   xfs_sb_version_haslogv2(sbp)
 410 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
 411 {
 412         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 413                 ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
 414 }
 415
 416 #define XFS_SB_VERSION_HASEXTFLGBIT(sbp)        xfs_sb_version_hasextflgbit(sbp)
 417 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
 418 {
 419         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 420                 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
 421 }
 422
 423 #define XFS_SB_VERSION_ADDEXTFLGBIT(sbp)        xfs_sb_version_addextflgbit(sbp)
 424 static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
 425 {
 426         return (sbp)->sb_versionnum = \
 427                 ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
 428 }
 429
 430 #define XFS_SB_VERSION_SUBEXTFLGBIT(sbp)        xfs_sb_version_subextflgbit(sbp)
 431 static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
 432 {
 433         return (sbp)->sb_versionnum = \
 434                 ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
 435 }
 436
 437 #define XFS_SB_VERSION_HASSECTOR(sbp)   xfs_sb_version_hassector(sbp)
 438 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
 439 {
 440         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 441                 ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
 442 }
 443
 444 #define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
 445 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
 446 {
 447         return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
 448                 ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
 449 }
 450
 451 /*
 452  * sb_features2 bit version macros.
 453  *
 454  * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 455  *
 456  * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 457  *      ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
 458  *       ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 459  */
 460
 461 #define XFS_SB_VERSION_HASATTR2(sbp)    xfs_sb_version_hasattr2(sbp)
 462 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 463 {
 464         return (XFS_SB_VERSION_HASMOREBITS(sbp)) &&     \
 465                 ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
 466 }
 467
 468 #define XFS_SB_VERSION_ADDATTR2(sbp)    xfs_sb_version_addattr2(sbp)
 469 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
 470 {
 471         ((sbp)->sb_versionnum = \
 472                 ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT),    \
 473         ((sbp)->sb_features2 =  \
 474                 ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
 475 }
 476
 477 /*
 478  * end of superblock version macros
 479  */
 480
 481 #define XFS_SB_DADDR            ((xfs_daddr_t)0) /* daddr in filesystem/ag */
 482 #define XFS_SB_BLOCK(mp)        XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
 483 #define XFS_BUF_TO_SBP(bp)      ((xfs_sb_t *)XFS_BUF_PTR(bp))
 484
 485 #define XFS_HDR_BLOCK(mp,d)     ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
 486 #define XFS_DADDR_TO_FSB(mp,d)  XFS_AGB_TO_FSB(mp, \
 487                         XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
 488 #define XFS_FSB_TO_DADDR(mp,fsbno)      XFS_AGB_TO_DADDR(mp, \
 489                         XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
 490
 491 /*
 492  * File system sector to basic block conversions.
 493  */
 494 #define XFS_FSS_TO_BB(mp,sec)   ((sec) << (mp)->m_sectbb_log)
 495 #define XFS_BB_TO_FSS(mp,bb)    \
 496         (((bb) + (XFS_FSS_TO_BB(mp,1) - 1)) >> (mp)->m_sectbb_log)
 497 #define XFS_BB_TO_FSST(mp,bb)   ((bb) >> (mp)->m_sectbb_log)
 498
 499 /*
 500  * File system sector to byte conversions.
 501  */
 502 #define XFS_FSS_TO_B(mp,sectno) ((xfs_fsize_t)(sectno) << (mp)->m_sb.sb_sectlog)
 503 #define XFS_B_TO_FSST(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_sectlog)
 504
 505 /*
 506  * File system block to basic block conversions.
 507  */
 508 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
 509 #define XFS_BB_TO_FSB(mp,bb)    \
 510         (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
 511 #define XFS_BB_TO_FSBT(mp,bb)   ((bb) >> (mp)->m_blkbb_log)
 512 #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
 513
 514 /*
 515  * File system block to byte conversions.
 516  */
 517 #define XFS_FSB_TO_B(mp,fsbno)  ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
 518 #define XFS_B_TO_FSB(mp,b)      \
 519         ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
 520 #define XFS_B_TO_FSBT(mp,b)     (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
 521 #define XFS_B_FSB_OFFSET(mp,b)  ((b) & (mp)->m_blockmask)
 522
 523 #endif  /* __XFS_SB_H__ */