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_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)
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.
77 * These defines represent bits in sb_features2.
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 */
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 \
96 #define XFS_SB_VERSION2_OKREALBITS \
97 (XFS_SB_VERSION2_OKREALFBITS | \
98 XFS_SB_VERSION2_OKSASHFBITS )
101 * Superblock - in core version. Must match the ondisk version below.
102 * Must be padded to 64 bit alignment.
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 */
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().
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 */
144 * End contiguous fields.
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 */
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.
166 __uint32_t sb_bad_features2;
168 /* version 5 superblock fields start here */
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;
176 __uint32_t sb_crc; /* superblock crc */
179 xfs_ino_t sb_pquotino; /* project quota inode */
180 xfs_lsn_t sb_lsn; /* last write sequence */
182 /* must be padded to 64 bit alignment */
186 * Superblock - on disk version. Must match the in core version above.
187 * Must be padded to 64 bit alignment.
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 */
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().
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 */
229 * End contiguous fields.
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 */
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.
250 __be32 sb_bad_features2;
252 /* version 5 superblock fields start here */
255 __be32 sb_features_compat;
256 __be32 sb_features_ro_compat;
257 __be32 sb_features_incompat;
258 __be32 sb_features_log_incompat;
260 __le32 sb_crc; /* superblock crc */
263 __be64 sb_pquotino; /* project quota inode */
264 __be64 sb_lsn; /* last write sequence */
266 /* must be padded to 64 bit alignment */
270 * Sequence number values for the fields.
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,
293 * Mask values, defined based on the xfs_sb_field_t values.
294 * Only define the ones we're using.
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)
333 * Misc. Flags - warning - these will be cleared by xfs_repair unless
334 * a feature bit is set when the flag is used.
336 #define XFS_SBF_NOFLAGS 0x00 /* no flags set */
337 #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
340 * define max. shared version we can interoperate with
342 #define XFS_SB_MAX_SHARED_VN 0
344 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
346 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
348 /* We always support version 1-3 */
349 if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
350 sbp->sb_versionnum <= XFS_SB_VERSION_3)
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)))
360 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
364 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
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.
374 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
376 return (sbp->sb_bad_features2 != sbp->sb_features2);
379 static inline unsigned xfs_sb_version_tonew(unsigned v)
381 if (v == XFS_SB_VERSION_1)
382 return XFS_SB_VERSION_4;
384 if (v == XFS_SB_VERSION_2)
385 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
387 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
388 XFS_SB_VERSION_NLINKBIT;
391 static inline unsigned xfs_sb_version_toold(unsigned v)
393 if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
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;
402 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
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));
410 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
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;
417 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
420 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
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));
427 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
429 if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
430 sbp->sb_versionnum = XFS_SB_VERSION_3;
432 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
435 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
437 return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
438 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
441 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
443 if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
444 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
446 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
447 XFS_SB_VERSION_QUOTABIT;
450 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
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));
457 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
459 return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
460 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
463 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
465 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
466 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
469 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
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));
476 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
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));
483 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
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));
490 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
492 return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
493 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
496 static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
498 return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
499 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
502 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
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));
510 * sb_features2 bit version macros.
512 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
514 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
515 * ((xfs_sb_version_hasmorebits(sbp) &&
516 * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
519 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
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));
526 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
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));
533 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
535 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
536 sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
539 static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
541 sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
542 if (!sbp->sb_features2)
543 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
546 static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
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));
553 static inline void xfs_sb_version_addprojid32bit(xfs_sb_t *sbp)
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;
561 * Extended v5 superblock feature masks. These are to be used for new v5
562 * superblock features only.
564 * Compat features are new features that old kernels will not notice or affect
565 * and so can mount read-write without issues.
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.
571 * InCompat features are features which old kernels will not understand and so
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.
578 #define XFS_SB_FEAT_COMPAT_ALL 0
579 #define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL
581 xfs_sb_has_compat_feature(
585 return (sbp->sb_features_compat & feature) != 0;
588 #define XFS_SB_FEAT_RO_COMPAT_ALL 0
589 #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
591 xfs_sb_has_ro_compat_feature(
595 return (sbp->sb_features_ro_compat & feature) != 0;
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)
602 #define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL
604 xfs_sb_has_incompat_feature(
608 return (sbp->sb_features_incompat & feature) != 0;
611 #define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
612 #define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
614 xfs_sb_has_incompat_log_feature(
618 return (sbp->sb_features_log_incompat & feature) != 0;
622 * V5 superblock specific feature checks
624 static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
626 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
629 static inline int xfs_sb_version_has_pquotino(xfs_sb_t *sbp)
631 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
634 static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp)
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));
643 * end of superblock version macros
647 xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino)
649 return (ino == sbp->sb_uquotino ||
650 ino == sbp->sb_gquotino ||
651 ino == sbp->sb_pquotino);
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))
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))
665 * File system sector to basic block conversions.
667 #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
670 * File system block to basic block conversions.
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)
678 * File system block to byte conversions.
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)
687 * perag get/put wrappers for ref counting
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,
692 extern void xfs_perag_put(struct xfs_perag *pag);
693 extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
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);
702 #endif /* __XFS_SB_H__ */