2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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.
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.
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
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.
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_ATTRBIT 0x0010
40 #define XFS_SB_VERSION_NLINKBIT 0x0020
41 #define XFS_SB_VERSION_QUOTABIT 0x0040
42 #define XFS_SB_VERSION_ALIGNBIT 0x0080
43 #define XFS_SB_VERSION_DALIGNBIT 0x0100
44 #define XFS_SB_VERSION_SHAREDBIT 0x0200
45 #define XFS_SB_VERSION_LOGV2BIT 0x0400
46 #define XFS_SB_VERSION_SECTORBIT 0x0800
47 #define XFS_SB_VERSION_EXTFLGBIT 0x1000
48 #define XFS_SB_VERSION_DIRV2BIT 0x2000
49 #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */
50 #define XFS_SB_VERSION_MOREBITSBIT 0x8000
53 * Supported feature bit list is just all bits in the versionnum field because
54 * we've used them all up and understand them all. Except, of course, for the
55 * shared superblock bit, which nobody knows what it does and so is unsupported.
57 #define XFS_SB_VERSION_OKBITS \
58 ((XFS_SB_VERSION_NUMBITS | XFS_SB_VERSION_ALLFBITS) & \
59 ~XFS_SB_VERSION_SHAREDBIT)
62 * There are two words to hold XFS "feature" bits: the original
63 * word, sb_versionnum, and sb_features2. Whenever a bit is set in
64 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
66 * These defines represent bits in sb_features2.
68 #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
69 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
70 #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
71 #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
72 #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
73 #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
74 #define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */
75 #define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */
77 #define XFS_SB_VERSION2_OKBITS \
78 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
79 XFS_SB_VERSION2_ATTR2BIT | \
80 XFS_SB_VERSION2_PROJID32BIT | \
81 XFS_SB_VERSION2_FTYPE)
84 * Superblock - in core version. Must match the ondisk version below.
85 * Must be padded to 64 bit alignment.
87 typedef struct xfs_sb {
88 __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
89 __uint32_t sb_blocksize; /* logical block size, bytes */
90 xfs_drfsbno_t sb_dblocks; /* number of data blocks */
91 xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
92 xfs_drtbno_t sb_rextents; /* number of realtime extents */
93 uuid_t sb_uuid; /* file system unique id */
94 xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
95 xfs_ino_t sb_rootino; /* root inode number */
96 xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
97 xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
98 xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
99 xfs_agblock_t sb_agblocks; /* size of an allocation group */
100 xfs_agnumber_t sb_agcount; /* number of allocation groups */
101 xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
102 xfs_extlen_t sb_logblocks; /* number of log blocks */
103 __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
104 __uint16_t sb_sectsize; /* volume sector size, bytes */
105 __uint16_t sb_inodesize; /* inode size, bytes */
106 __uint16_t sb_inopblock; /* inodes per block */
107 char sb_fname[12]; /* file system name */
108 __uint8_t sb_blocklog; /* log2 of sb_blocksize */
109 __uint8_t sb_sectlog; /* log2 of sb_sectsize */
110 __uint8_t sb_inodelog; /* log2 of sb_inodesize */
111 __uint8_t sb_inopblog; /* log2 of sb_inopblock */
112 __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
113 __uint8_t sb_rextslog; /* log2 of sb_rextents */
114 __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
115 __uint8_t sb_imax_pct; /* max % of fs for inode space */
118 * These fields must remain contiguous. If you really
119 * want to change their layout, make sure you fix the
120 * code in xfs_trans_apply_sb_deltas().
122 __uint64_t sb_icount; /* allocated inodes */
123 __uint64_t sb_ifree; /* free inodes */
124 __uint64_t sb_fdblocks; /* free data blocks */
125 __uint64_t sb_frextents; /* free realtime extents */
127 * End contiguous fields.
129 xfs_ino_t sb_uquotino; /* user quota inode */
130 xfs_ino_t sb_gquotino; /* group quota inode */
131 __uint16_t sb_qflags; /* quota flags */
132 __uint8_t sb_flags; /* misc. flags */
133 __uint8_t sb_shared_vn; /* shared version number */
134 xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
135 __uint32_t sb_unit; /* stripe or raid unit */
136 __uint32_t sb_width; /* stripe or raid width */
137 __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
138 __uint8_t sb_logsectlog; /* log2 of the log sector size */
139 __uint16_t sb_logsectsize; /* sector size for the log, bytes */
140 __uint32_t sb_logsunit; /* stripe unit size for the log */
141 __uint32_t sb_features2; /* additional feature bits */
144 * bad features2 field as a result of failing to pad the sb
145 * structure to 64 bits. Some machines will be using this field
146 * for features2 bits. Easiest just to mark it bad and not use
147 * it for anything else.
149 __uint32_t sb_bad_features2;
151 /* version 5 superblock fields start here */
154 __uint32_t sb_features_compat;
155 __uint32_t sb_features_ro_compat;
156 __uint32_t sb_features_incompat;
157 __uint32_t sb_features_log_incompat;
159 __uint32_t sb_crc; /* superblock crc */
162 xfs_ino_t sb_pquotino; /* project quota inode */
163 xfs_lsn_t sb_lsn; /* last write sequence */
165 /* must be padded to 64 bit alignment */
168 #define XFS_SB_CRC_OFF offsetof(struct xfs_sb, sb_crc)
171 * Superblock - on disk version. Must match the in core version above.
172 * Must be padded to 64 bit alignment.
174 typedef struct xfs_dsb {
175 __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */
176 __be32 sb_blocksize; /* logical block size, bytes */
177 __be64 sb_dblocks; /* number of data blocks */
178 __be64 sb_rblocks; /* number of realtime blocks */
179 __be64 sb_rextents; /* number of realtime extents */
180 uuid_t sb_uuid; /* file system unique id */
181 __be64 sb_logstart; /* starting block of log if internal */
182 __be64 sb_rootino; /* root inode number */
183 __be64 sb_rbmino; /* bitmap inode for realtime extents */
184 __be64 sb_rsumino; /* summary inode for rt bitmap */
185 __be32 sb_rextsize; /* realtime extent size, blocks */
186 __be32 sb_agblocks; /* size of an allocation group */
187 __be32 sb_agcount; /* number of allocation groups */
188 __be32 sb_rbmblocks; /* number of rt bitmap blocks */
189 __be32 sb_logblocks; /* number of log blocks */
190 __be16 sb_versionnum; /* header version == XFS_SB_VERSION */
191 __be16 sb_sectsize; /* volume sector size, bytes */
192 __be16 sb_inodesize; /* inode size, bytes */
193 __be16 sb_inopblock; /* inodes per block */
194 char sb_fname[12]; /* file system name */
195 __u8 sb_blocklog; /* log2 of sb_blocksize */
196 __u8 sb_sectlog; /* log2 of sb_sectsize */
197 __u8 sb_inodelog; /* log2 of sb_inodesize */
198 __u8 sb_inopblog; /* log2 of sb_inopblock */
199 __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */
200 __u8 sb_rextslog; /* log2 of sb_rextents */
201 __u8 sb_inprogress; /* mkfs is in progress, don't mount */
202 __u8 sb_imax_pct; /* max % of fs for inode space */
205 * These fields must remain contiguous. If you really
206 * want to change their layout, make sure you fix the
207 * code in xfs_trans_apply_sb_deltas().
209 __be64 sb_icount; /* allocated inodes */
210 __be64 sb_ifree; /* free inodes */
211 __be64 sb_fdblocks; /* free data blocks */
212 __be64 sb_frextents; /* free realtime extents */
214 * End contiguous fields.
216 __be64 sb_uquotino; /* user quota inode */
217 __be64 sb_gquotino; /* group quota inode */
218 __be16 sb_qflags; /* quota flags */
219 __u8 sb_flags; /* misc. flags */
220 __u8 sb_shared_vn; /* shared version number */
221 __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */
222 __be32 sb_unit; /* stripe or raid unit */
223 __be32 sb_width; /* stripe or raid width */
224 __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */
225 __u8 sb_logsectlog; /* log2 of the log sector size */
226 __be16 sb_logsectsize; /* sector size for the log, bytes */
227 __be32 sb_logsunit; /* stripe unit size for the log */
228 __be32 sb_features2; /* additional feature bits */
230 * bad features2 field as a result of failing to pad the sb
231 * structure to 64 bits. Some machines will be using this field
232 * for features2 bits. Easiest just to mark it bad and not use
233 * it for anything else.
235 __be32 sb_bad_features2;
237 /* version 5 superblock fields start here */
240 __be32 sb_features_compat;
241 __be32 sb_features_ro_compat;
242 __be32 sb_features_incompat;
243 __be32 sb_features_log_incompat;
245 __le32 sb_crc; /* superblock crc */
248 __be64 sb_pquotino; /* project quota inode */
249 __be64 sb_lsn; /* last write sequence */
251 /* must be padded to 64 bit alignment */
255 * Sequence number values for the fields.
258 XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
259 XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
260 XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
261 XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
262 XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
263 XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
264 XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
265 XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
266 XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
267 XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
268 XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
269 XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
270 XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT,
271 XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT,
272 XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD,
273 XFS_SBS_PQUOTINO, XFS_SBS_LSN,
278 * Mask values, defined based on the xfs_sb_field_t values.
279 * Only define the ones we're using.
281 #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
282 #define XFS_SB_UUID XFS_SB_MVAL(UUID)
283 #define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
284 #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
285 #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
286 #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
287 #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
288 #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
289 #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
290 #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
291 #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
292 #define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
293 #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
294 #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
295 #define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
296 #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
297 #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
298 #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
299 #define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT)
300 #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
301 #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
302 #define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
303 #define XFS_SB_CRC XFS_SB_MVAL(CRC)
304 #define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO)
305 #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
306 #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
307 #define XFS_SB_MOD_BITS \
308 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
309 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
310 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
311 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
312 XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
313 XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
314 XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
318 * Misc. Flags - warning - these will be cleared by xfs_repair unless
319 * a feature bit is set when the flag is used.
321 #define XFS_SBF_NOFLAGS 0x00 /* no flags set */
322 #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
325 * define max. shared version we can interoperate with
327 #define XFS_SB_MAX_SHARED_VN 0
329 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
332 * The first XFS version we support is a v4 superblock with V2 directories.
334 static inline bool xfs_sb_good_v4_features(struct xfs_sb *sbp)
336 if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT))
339 /* check for unknown features in the fs */
340 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) ||
341 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
342 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS)))
348 static inline bool xfs_sb_good_version(struct xfs_sb *sbp)
350 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
352 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
353 return xfs_sb_good_v4_features(sbp);
358 * Detect a mismatched features2 field. Older kernels read/wrote
359 * this into the wrong slot, so to be safe we keep them in sync.
361 static inline bool xfs_sb_has_mismatched_features2(struct xfs_sb *sbp)
363 return sbp->sb_bad_features2 != sbp->sb_features2;
366 static inline bool xfs_sb_version_hasattr(struct xfs_sb *sbp)
368 return (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT);
371 static inline void xfs_sb_version_addattr(struct xfs_sb *sbp)
373 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
376 static inline bool xfs_sb_version_hasquota(struct xfs_sb *sbp)
378 return (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
381 static inline void xfs_sb_version_addquota(struct xfs_sb *sbp)
383 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
386 static inline bool xfs_sb_version_hasalign(struct xfs_sb *sbp)
388 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
389 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
392 static inline bool xfs_sb_version_hasdalign(struct xfs_sb *sbp)
394 return (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
397 static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp)
399 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
400 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
403 static inline bool xfs_sb_version_hasextflgbit(struct xfs_sb *sbp)
405 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
406 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
409 static inline bool xfs_sb_version_hassector(struct xfs_sb *sbp)
411 return (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
414 static inline bool xfs_sb_version_hasasciici(struct xfs_sb *sbp)
416 return (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
419 static inline bool xfs_sb_version_hasmorebits(struct xfs_sb *sbp)
421 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
422 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
426 * sb_features2 bit version macros.
428 static inline bool xfs_sb_version_haslazysbcount(struct xfs_sb *sbp)
430 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
431 (xfs_sb_version_hasmorebits(sbp) &&
432 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
435 static inline bool xfs_sb_version_hasattr2(struct xfs_sb *sbp)
437 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
438 (xfs_sb_version_hasmorebits(sbp) &&
439 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT));
442 static inline void xfs_sb_version_addattr2(struct xfs_sb *sbp)
444 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
445 sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
446 sbp->sb_bad_features2 |= XFS_SB_VERSION2_ATTR2BIT;
449 static inline void xfs_sb_version_removeattr2(struct xfs_sb *sbp)
451 sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
452 sbp->sb_bad_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
453 if (!sbp->sb_features2)
454 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
457 static inline bool xfs_sb_version_hasprojid32bit(struct xfs_sb *sbp)
459 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
460 (xfs_sb_version_hasmorebits(sbp) &&
461 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT));
464 static inline void xfs_sb_version_addprojid32bit(struct xfs_sb *sbp)
466 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
467 sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT;
468 sbp->sb_bad_features2 |= XFS_SB_VERSION2_PROJID32BIT;
472 * Extended v5 superblock feature masks. These are to be used for new v5
473 * superblock features only.
475 * Compat features are new features that old kernels will not notice or affect
476 * and so can mount read-write without issues.
478 * RO-Compat (read only) are features that old kernels can read but will break
479 * if they write. Hence only read-only mounts of such filesystems are allowed on
480 * kernels that don't support the feature bit.
482 * InCompat features are features which old kernels will not understand and so
485 * Log-InCompat features are for changes to log formats or new transactions that
486 * can't be replayed on older kernels. The fields are set when the filesystem is
487 * mounted, and a clean unmount clears the fields.
489 #define XFS_SB_FEAT_COMPAT_ALL 0
490 #define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL
492 xfs_sb_has_compat_feature(
496 return (sbp->sb_features_compat & feature) != 0;
499 #define XFS_SB_FEAT_RO_COMPAT_FINOBT (1 << 0) /* free inode btree */
500 #define XFS_SB_FEAT_RO_COMPAT_ALL \
501 (XFS_SB_FEAT_RO_COMPAT_FINOBT)
502 #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
504 xfs_sb_has_ro_compat_feature(
508 return (sbp->sb_features_ro_compat & feature) != 0;
511 #define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */
512 #define XFS_SB_FEAT_INCOMPAT_ALL \
513 (XFS_SB_FEAT_INCOMPAT_FTYPE)
515 #define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL
517 xfs_sb_has_incompat_feature(
521 return (sbp->sb_features_incompat & feature) != 0;
524 #define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
525 #define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
527 xfs_sb_has_incompat_log_feature(
531 return (sbp->sb_features_log_incompat & feature) != 0;
535 * V5 superblock specific feature checks
537 static inline int xfs_sb_version_hascrc(struct xfs_sb *sbp)
539 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
542 static inline int xfs_sb_version_has_pquotino(struct xfs_sb *sbp)
544 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
547 static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp)
549 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
550 xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) ||
551 (xfs_sb_version_hasmorebits(sbp) &&
552 (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE));
555 static inline int xfs_sb_version_hasfinobt(xfs_sb_t *sbp)
557 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) &&
558 (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT);
562 * end of superblock version macros
566 xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino)
568 return (ino == sbp->sb_uquotino ||
569 ino == sbp->sb_gquotino ||
570 ino == sbp->sb_pquotino);
573 #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
574 #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
575 #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr))
577 #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
578 #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
579 xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
580 #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
581 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
584 * File system sector to basic block conversions.
586 #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
589 * File system block to basic block conversions.
591 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
592 #define XFS_BB_TO_FSB(mp,bb) \
593 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
594 #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
597 * File system block to byte conversions.
599 #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
600 #define XFS_B_TO_FSB(mp,b) \
601 ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
602 #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
603 #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
606 * perag get/put wrappers for ref counting
608 extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
609 extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
611 extern void xfs_perag_put(struct xfs_perag *pag);
612 extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
614 extern void xfs_sb_calc_crc(struct xfs_buf *);
615 extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
616 extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *);
617 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
618 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
619 extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp);
621 #endif /* __XFS_SB_H__ */