1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #include "xfs.h"
7 #include "xfs_fs.h"
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_bit.h"
13 #include "xfs_sb.h"
14 #include "xfs_mount.h"
15 #include "xfs_ialloc.h"
16 #include "xfs_alloc.h"
17 #include "xfs_error.h"
18 #include "xfs_trans.h"
19 #include "xfs_buf_item.h"
20 #include "xfs_bmap_btree.h"
21 #include "xfs_alloc_btree.h"
22 #include "xfs_log.h"
23 #include "xfs_rmap_btree.h"
24 #include "xfs_refcount_btree.h"
25 #include "xfs_da_format.h"
26 #include "xfs_health.h"
27 #include "xfs_ag.h"
28 #include "xfs_rtbitmap.h"
29 #include "xfs_exchrange.h"
30 #include "xfs_rtgroup.h"
31 #include "xfs_rtrmap_btree.h"
32 #include "xfs_rtrefcount_btree.h"
33
34 /*
35 * Physical superblock buffer manipulations. Shared with libxfs in userspace.
36 */
37
38 /*
39 * Check that all the V4 feature bits that the V5 filesystem format requires are
40 * correctly set.
41 */
42 static bool
xfs_sb_validate_v5_features(struct xfs_sb * sbp)43 xfs_sb_validate_v5_features(
44 struct xfs_sb *sbp)
45 {
46 /* We must not have any unknown V4 feature bits set */
47 if (sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS)
48 return false;
49
50 /*
51 * The CRC bit is considered an invalid V4 flag, so we have to add it
52 * manually to the OKBITS mask.
53 */
54 if (sbp->sb_features2 & ~(XFS_SB_VERSION2_OKBITS |
55 XFS_SB_VERSION2_CRCBIT))
56 return false;
57
58 /* Now check all the required V4 feature flags are set. */
59
60 #define V5_VERS_FLAGS (XFS_SB_VERSION_NLINKBIT | \
61 XFS_SB_VERSION_ALIGNBIT | \
62 XFS_SB_VERSION_LOGV2BIT | \
63 XFS_SB_VERSION_EXTFLGBIT | \
64 XFS_SB_VERSION_DIRV2BIT | \
65 XFS_SB_VERSION_MOREBITSBIT)
66
67 #define V5_FEAT_FLAGS (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
68 XFS_SB_VERSION2_ATTR2BIT | \
69 XFS_SB_VERSION2_PROJID32BIT | \
70 XFS_SB_VERSION2_CRCBIT)
71
72 if ((sbp->sb_versionnum & V5_VERS_FLAGS) != V5_VERS_FLAGS)
73 return false;
74 if ((sbp->sb_features2 & V5_FEAT_FLAGS) != V5_FEAT_FLAGS)
75 return false;
76 return true;
77 }
78
79 /*
80 * We current support XFS v5 formats with known features and v4 superblocks with
81 * at least V2 directories.
82 */
83 bool
xfs_sb_good_version(struct xfs_sb * sbp)84 xfs_sb_good_version(
85 struct xfs_sb *sbp)
86 {
87 /*
88 * All v5 filesystems are supported, but we must check that all the
89 * required v4 feature flags are enabled correctly as the code checks
90 * those flags and not for v5 support.
91 */
92 if (xfs_sb_is_v5(sbp))
93 return xfs_sb_validate_v5_features(sbp);
94
95 /* versions prior to v4 are not supported */
96 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_4)
97 return false;
98
99 /* We must not have any unknown v4 feature bits set */
100 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) ||
101 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
102 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS)))
103 return false;
104
105 /* V4 filesystems need v2 directories and unwritten extents */
106 if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT))
107 return false;
108 if (!(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT))
109 return false;
110
111 /* It's a supported v4 filesystem */
112 return true;
113 }
114
115 uint64_t
xfs_sb_version_to_features(struct xfs_sb * sbp)116 xfs_sb_version_to_features(
117 struct xfs_sb *sbp)
118 {
119 uint64_t features = 0;
120
121 /* optional V4 features */
122 if (sbp->sb_rblocks > 0)
123 features |= XFS_FEAT_REALTIME;
124 if (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT)
125 features |= XFS_FEAT_NLINK;
126 if (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT)
127 features |= XFS_FEAT_ATTR;
128 if (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT)
129 features |= XFS_FEAT_QUOTA;
130 if (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)
131 features |= XFS_FEAT_ALIGN;
132 if (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT)
133 features |= XFS_FEAT_LOGV2;
134 if (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT)
135 features |= XFS_FEAT_DALIGN;
136 if (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)
137 features |= XFS_FEAT_EXTFLG;
138 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT)
139 features |= XFS_FEAT_SECTOR;
140 if (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT)
141 features |= XFS_FEAT_ASCIICI;
142 if (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) {
143 if (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)
144 features |= XFS_FEAT_LAZYSBCOUNT;
145 if (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)
146 features |= XFS_FEAT_ATTR2;
147 if (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)
148 features |= XFS_FEAT_PROJID32;
149 if (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE)
150 features |= XFS_FEAT_FTYPE;
151 }
152
153 if (!xfs_sb_is_v5(sbp))
154 return features;
155
156 /* Always on V5 features */
157 features |= XFS_FEAT_ALIGN | XFS_FEAT_LOGV2 | XFS_FEAT_EXTFLG |
158 XFS_FEAT_LAZYSBCOUNT | XFS_FEAT_ATTR2 | XFS_FEAT_PROJID32 |
159 XFS_FEAT_V3INODES | XFS_FEAT_CRC | XFS_FEAT_PQUOTINO;
160
161 /* Optional V5 features */
162 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT)
163 features |= XFS_FEAT_FINOBT;
164 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT)
165 features |= XFS_FEAT_RMAPBT;
166 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK)
167 features |= XFS_FEAT_REFLINK;
168 if (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT)
169 features |= XFS_FEAT_INOBTCNT;
170 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_FTYPE)
171 features |= XFS_FEAT_FTYPE;
172 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES)
173 features |= XFS_FEAT_SPINODES;
174 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)
175 features |= XFS_FEAT_META_UUID;
176 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_BIGTIME)
177 features |= XFS_FEAT_BIGTIME;
178 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR)
179 features |= XFS_FEAT_NEEDSREPAIR;
180 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NREXT64)
181 features |= XFS_FEAT_NREXT64;
182 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE)
183 features |= XFS_FEAT_EXCHANGE_RANGE;
184 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_PARENT)
185 features |= XFS_FEAT_PARENT;
186 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)
187 features |= XFS_FEAT_METADIR;
188 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED)
189 features |= XFS_FEAT_ZONED;
190
191 return features;
192 }
193
194 /* Check all the superblock fields we care about when reading one in. */
195 STATIC int
xfs_validate_sb_read(struct xfs_mount * mp,struct xfs_sb * sbp)196 xfs_validate_sb_read(
197 struct xfs_mount *mp,
198 struct xfs_sb *sbp)
199 {
200 if (!xfs_sb_is_v5(sbp))
201 return 0;
202
203 /*
204 * Version 5 superblock feature mask validation. Reject combinations
205 * the kernel cannot support up front before checking anything else.
206 */
207 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) {
208 xfs_warn(mp,
209 "Superblock has unknown compatible features (0x%x) enabled.",
210 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN));
211 xfs_warn(mp,
212 "Using a more recent kernel is recommended.");
213 }
214
215 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
216 xfs_alert(mp,
217 "Superblock has unknown read-only compatible features (0x%x) enabled.",
218 (sbp->sb_features_ro_compat &
219 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
220 if (!xfs_is_readonly(mp)) {
221 xfs_warn(mp,
222 "Attempted to mount read-only compatible filesystem read-write.");
223 xfs_warn(mp,
224 "Filesystem can only be safely mounted read only.");
225
226 return -EINVAL;
227 }
228 }
229 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
230 xfs_warn(mp,
231 "Superblock has unknown incompatible features (0x%x) enabled.",
232 (sbp->sb_features_incompat &
233 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
234 xfs_warn(mp,
235 "Filesystem cannot be safely mounted by this kernel.");
236 return -EINVAL;
237 }
238
239 return 0;
240 }
241
242 /* Return the number of extents covered by a single rt bitmap file */
243 static xfs_rtbxlen_t
xfs_extents_per_rbm(struct xfs_sb * sbp)244 xfs_extents_per_rbm(
245 struct xfs_sb *sbp)
246 {
247 if (xfs_sb_is_v5(sbp) &&
248 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR))
249 return sbp->sb_rgextents;
250 return sbp->sb_rextents;
251 }
252
253 /*
254 * Return the payload size of a single rt bitmap block (without the metadata
255 * header if any).
256 */
257 static inline unsigned int
xfs_rtbmblock_size(struct xfs_sb * sbp)258 xfs_rtbmblock_size(
259 struct xfs_sb *sbp)
260 {
261 if (xfs_sb_is_v5(sbp) &&
262 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR))
263 return sbp->sb_blocksize - sizeof(struct xfs_rtbuf_blkinfo);
264 return sbp->sb_blocksize;
265 }
266
267 static uint64_t
xfs_expected_rbmblocks(struct xfs_sb * sbp)268 xfs_expected_rbmblocks(
269 struct xfs_sb *sbp)
270 {
271 if (xfs_sb_is_v5(sbp) &&
272 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED))
273 return 0;
274 return howmany_64(xfs_extents_per_rbm(sbp),
275 NBBY * xfs_rtbmblock_size(sbp));
276 }
277
278 /* Validate the realtime geometry */
279 bool
xfs_validate_rt_geometry(struct xfs_sb * sbp)280 xfs_validate_rt_geometry(
281 struct xfs_sb *sbp)
282 {
283 if (xfs_sb_is_v5(sbp) &&
284 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED)) {
285 if (sbp->sb_rextsize != 1)
286 return false;
287 } else {
288 if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE ||
289 sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE)
290 return false;
291 }
292
293 if (sbp->sb_rblocks == 0) {
294 if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 ||
295 sbp->sb_rextslog != 0 || sbp->sb_frextents != 0)
296 return false;
297 return true;
298 }
299
300 if (sbp->sb_rextents == 0 ||
301 sbp->sb_rextents != div_u64(sbp->sb_rblocks, sbp->sb_rextsize) ||
302 sbp->sb_rextslog != xfs_compute_rextslog(sbp->sb_rextents) ||
303 sbp->sb_rbmblocks != xfs_expected_rbmblocks(sbp))
304 return false;
305
306 return true;
307 }
308
309 /* Check all the superblock fields we care about when writing one out. */
310 STATIC int
xfs_validate_sb_write(struct xfs_mount * mp,struct xfs_buf * bp,struct xfs_sb * sbp)311 xfs_validate_sb_write(
312 struct xfs_mount *mp,
313 struct xfs_buf *bp,
314 struct xfs_sb *sbp)
315 {
316 /*
317 * Carry out additional sb summary counter sanity checks when we write
318 * the superblock. We skip this in the read validator because there
319 * could be newer superblocks in the log and if the values are garbage
320 * even after replay we'll recalculate them at the end of log mount.
321 *
322 * mkfs has traditionally written zeroed counters to inprogress and
323 * secondary superblocks, so allow this usage to continue because
324 * we never read counters from such superblocks.
325 */
326 if (xfs_buf_daddr(bp) == XFS_SB_DADDR && !sbp->sb_inprogress &&
327 (sbp->sb_fdblocks > sbp->sb_dblocks ||
328 !xfs_verify_icount(mp, sbp->sb_icount) ||
329 sbp->sb_ifree > sbp->sb_icount)) {
330 xfs_warn(mp, "SB summary counter sanity check failed");
331 return -EFSCORRUPTED;
332 }
333
334 if (!xfs_sb_is_v5(sbp))
335 return 0;
336
337 /*
338 * Version 5 superblock feature mask validation. Reject combinations
339 * the kernel cannot support since we checked for unsupported bits in
340 * the read verifier, which means that memory is corrupt.
341 */
342 if (!xfs_is_readonly(mp) &&
343 xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
344 xfs_alert(mp,
345 "Corruption detected in superblock read-only compatible features (0x%x)!",
346 (sbp->sb_features_ro_compat &
347 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
348 return -EFSCORRUPTED;
349 }
350 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
351 xfs_warn(mp,
352 "Corruption detected in superblock incompatible features (0x%x)!",
353 (sbp->sb_features_incompat &
354 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
355 return -EFSCORRUPTED;
356 }
357 if (xfs_sb_has_incompat_log_feature(sbp,
358 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) {
359 xfs_warn(mp,
360 "Corruption detected in superblock incompatible log features (0x%x)!",
361 (sbp->sb_features_log_incompat &
362 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN));
363 return -EFSCORRUPTED;
364 }
365
366 /*
367 * We can't read verify the sb LSN because the read verifier is called
368 * before the log is allocated and processed. We know the log is set up
369 * before write verifier calls, so check it here.
370 */
371 if (!xfs_log_check_lsn(mp, sbp->sb_lsn))
372 return -EFSCORRUPTED;
373
374 return 0;
375 }
376
377 int
xfs_compute_rgblklog(xfs_rtxlen_t rgextents,xfs_rgblock_t rextsize)378 xfs_compute_rgblklog(
379 xfs_rtxlen_t rgextents,
380 xfs_rgblock_t rextsize)
381 {
382 uint64_t rgblocks = (uint64_t)rgextents * rextsize;
383
384 return xfs_highbit64(rgblocks - 1) + 1;
385 }
386
387 static int
xfs_validate_sb_rtgroups(struct xfs_mount * mp,struct xfs_sb * sbp)388 xfs_validate_sb_rtgroups(
389 struct xfs_mount *mp,
390 struct xfs_sb *sbp)
391 {
392 uint64_t groups;
393 int rgblklog;
394
395 if (sbp->sb_rextsize == 0) {
396 xfs_warn(mp,
397 "Realtime extent size must not be zero.");
398 return -EINVAL;
399 }
400
401 if (sbp->sb_rgextents > XFS_MAX_RGBLOCKS / sbp->sb_rextsize) {
402 xfs_warn(mp,
403 "Realtime group size (%u) must be less than %u rt extents.",
404 sbp->sb_rgextents,
405 XFS_MAX_RGBLOCKS / sbp->sb_rextsize);
406 return -EINVAL;
407 }
408
409 if (sbp->sb_rgextents < XFS_MIN_RGEXTENTS) {
410 xfs_warn(mp,
411 "Realtime group size (%u) must be at least %u rt extents.",
412 sbp->sb_rgextents, XFS_MIN_RGEXTENTS);
413 return -EINVAL;
414 }
415
416 if (sbp->sb_rgcount > XFS_MAX_RGNUMBER) {
417 xfs_warn(mp,
418 "Realtime groups (%u) must be less than %u.",
419 sbp->sb_rgcount, XFS_MAX_RGNUMBER);
420 return -EINVAL;
421 }
422
423 groups = howmany_64(sbp->sb_rextents, sbp->sb_rgextents);
424 if (groups != sbp->sb_rgcount) {
425 xfs_warn(mp,
426 "Realtime groups (%u) do not cover the entire rt section; need (%llu) groups.",
427 sbp->sb_rgcount, groups);
428 return -EINVAL;
429 }
430
431 /* Exchange-range is required for fsr to work on realtime files */
432 if (!(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_EXCHRANGE)) {
433 xfs_warn(mp,
434 "Realtime groups feature requires exchange-range support.");
435 return -EINVAL;
436 }
437
438 rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents, sbp->sb_rextsize);
439 if (sbp->sb_rgblklog != rgblklog) {
440 xfs_warn(mp,
441 "Realtime group log (%d) does not match expected value (%d).",
442 sbp->sb_rgblklog, rgblklog);
443 return -EINVAL;
444 }
445
446 return 0;
447 }
448
449 static int
xfs_validate_sb_zoned(struct xfs_mount * mp,struct xfs_sb * sbp)450 xfs_validate_sb_zoned(
451 struct xfs_mount *mp,
452 struct xfs_sb *sbp)
453 {
454 if (sbp->sb_frextents != 0) {
455 xfs_warn(mp,
456 "sb_frextents must be zero for zoned file systems.");
457 return -EINVAL;
458 }
459
460 if (sbp->sb_rtstart && sbp->sb_rtstart < sbp->sb_dblocks) {
461 xfs_warn(mp,
462 "sb_rtstart (%lld) overlaps sb_dblocks (%lld).",
463 sbp->sb_rtstart, sbp->sb_dblocks);
464 return -EINVAL;
465 }
466
467 if (sbp->sb_rtreserved && sbp->sb_rtreserved >= sbp->sb_rblocks) {
468 xfs_warn(mp,
469 "sb_rtreserved (%lld) larger than sb_rblocks (%lld).",
470 sbp->sb_rtreserved, sbp->sb_rblocks);
471 return -EINVAL;
472 }
473
474 return 0;
475 }
476
477 /* Check the validity of the SB. */
478 STATIC int
xfs_validate_sb_common(struct xfs_mount * mp,struct xfs_buf * bp,struct xfs_sb * sbp)479 xfs_validate_sb_common(
480 struct xfs_mount *mp,
481 struct xfs_buf *bp,
482 struct xfs_sb *sbp)
483 {
484 struct xfs_dsb *dsb = bp->b_addr;
485 uint32_t agcount = 0;
486 uint32_t rem;
487 bool has_dalign;
488 int error;
489
490 if (!xfs_verify_magic(bp, dsb->sb_magicnum)) {
491 xfs_warn(mp,
492 "Superblock has bad magic number 0x%x. Not an XFS filesystem?",
493 be32_to_cpu(dsb->sb_magicnum));
494 return -EWRONGFS;
495 }
496
497 if (!xfs_sb_good_version(sbp)) {
498 xfs_warn(mp,
499 "Superblock has unknown features enabled or corrupted feature masks.");
500 return -EWRONGFS;
501 }
502
503 /*
504 * Validate feature flags and state
505 */
506 if (xfs_sb_is_v5(sbp)) {
507 if (sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) {
508 xfs_notice(mp,
509 "Block size (%u bytes) too small for Version 5 superblock (minimum %d bytes)",
510 sbp->sb_blocksize, XFS_MIN_CRC_BLOCKSIZE);
511 return -EFSCORRUPTED;
512 }
513
514 /* V5 has a separate project quota inode */
515 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) {
516 xfs_notice(mp,
517 "Version 5 of Super block has XFS_OQUOTA bits.");
518 return -EFSCORRUPTED;
519 }
520
521 /*
522 * Full inode chunks must be aligned to inode chunk size when
523 * sparse inodes are enabled to support the sparse chunk
524 * allocation algorithm and prevent overlapping inode records.
525 */
526 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_SPINODES) {
527 uint32_t align;
528
529 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize
530 >> sbp->sb_blocklog;
531 if (sbp->sb_inoalignmt != align) {
532 xfs_warn(mp,
533 "Inode block alignment (%u) must match chunk size (%u) for sparse inodes.",
534 sbp->sb_inoalignmt, align);
535 return -EINVAL;
536 }
537
538 if (sbp->sb_spino_align &&
539 (sbp->sb_spino_align > sbp->sb_inoalignmt ||
540 (sbp->sb_inoalignmt % sbp->sb_spino_align) != 0)) {
541 xfs_warn(mp,
542 "Sparse inode alignment (%u) is invalid, must be integer factor of (%u).",
543 sbp->sb_spino_align,
544 sbp->sb_inoalignmt);
545 return -EINVAL;
546 }
547 } else if (sbp->sb_spino_align) {
548 xfs_warn(mp,
549 "Sparse inode alignment (%u) should be zero.",
550 sbp->sb_spino_align);
551 return -EINVAL;
552 }
553
554 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) {
555 if (memchr_inv(sbp->sb_pad, 0, sizeof(sbp->sb_pad))) {
556 xfs_warn(mp,
557 "Metadir superblock padding fields must be zero.");
558 return -EINVAL;
559 }
560
561 error = xfs_validate_sb_rtgroups(mp, sbp);
562 if (error)
563 return error;
564 }
565 if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) {
566 error = xfs_validate_sb_zoned(mp, sbp);
567 if (error)
568 return error;
569 }
570 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
571 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
572 xfs_notice(mp,
573 "Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits.");
574 return -EFSCORRUPTED;
575 }
576
577 if (unlikely(
578 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
579 xfs_warn(mp,
580 "filesystem is marked as having an external log; "
581 "specify logdev on the mount command line.");
582 return -EINVAL;
583 }
584
585 if (unlikely(
586 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
587 xfs_warn(mp,
588 "filesystem is marked as having an internal log; "
589 "do not specify logdev on the mount command line.");
590 return -EINVAL;
591 }
592
593 /* Compute agcount for this number of dblocks and agblocks */
594 if (sbp->sb_agblocks) {
595 agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem);
596 if (rem)
597 agcount++;
598 }
599
600 /*
601 * More sanity checking. Most of these were stolen directly from
602 * xfs_repair.
603 */
604 if (unlikely(
605 sbp->sb_agcount <= 0 ||
606 sbp->sb_sectsize < XFS_MIN_SECTORSIZE ||
607 sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
608 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
609 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
610 sbp->sb_sectsize != (1 << sbp->sb_sectlog) ||
611 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
612 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
613 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
614 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
615 sbp->sb_blocksize != (1 << sbp->sb_blocklog) ||
616 sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
617 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
618 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
619 sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
620 sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
621 sbp->sb_inodesize != (1 << sbp->sb_inodelog) ||
622 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) ||
623 XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES ||
624 XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES ||
625 sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 ||
626 agcount == 0 || agcount != sbp->sb_agcount ||
627 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
628 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
629 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
630 (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) ||
631 sbp->sb_dblocks == 0 ||
632 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
633 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) ||
634 sbp->sb_shared_vn != 0)) {
635 xfs_notice(mp, "SB sanity check failed");
636 return -EFSCORRUPTED;
637 }
638
639 /*
640 * Logs that are too large are not supported at all. Reject them
641 * outright. Logs that are too small are tolerated on v4 filesystems,
642 * but we can only check that when mounting the log. Hence we skip
643 * those checks here.
644 */
645 if (sbp->sb_logblocks > XFS_MAX_LOG_BLOCKS) {
646 xfs_notice(mp,
647 "Log size 0x%x blocks too large, maximum size is 0x%llx blocks",
648 sbp->sb_logblocks, XFS_MAX_LOG_BLOCKS);
649 return -EFSCORRUPTED;
650 }
651
652 if (XFS_FSB_TO_B(mp, sbp->sb_logblocks) > XFS_MAX_LOG_BYTES) {
653 xfs_warn(mp,
654 "log size 0x%llx bytes too large, maximum size is 0x%llx bytes",
655 XFS_FSB_TO_B(mp, sbp->sb_logblocks),
656 XFS_MAX_LOG_BYTES);
657 return -EFSCORRUPTED;
658 }
659
660 /*
661 * Do not allow filesystems with corrupted log sector or stripe units to
662 * be mounted. We cannot safely size the iclogs or write to the log if
663 * the log stripe unit is not valid.
664 */
665 if (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT) {
666 if (sbp->sb_logsectsize != (1U << sbp->sb_logsectlog)) {
667 xfs_notice(mp,
668 "log sector size in bytes/log2 (0x%x/0x%x) must match",
669 sbp->sb_logsectsize, 1U << sbp->sb_logsectlog);
670 return -EFSCORRUPTED;
671 }
672 } else if (sbp->sb_logsectsize || sbp->sb_logsectlog) {
673 xfs_notice(mp,
674 "log sector size in bytes/log2 (0x%x/0x%x) are not zero",
675 sbp->sb_logsectsize, sbp->sb_logsectlog);
676 return -EFSCORRUPTED;
677 }
678
679 if (sbp->sb_logsunit > 1) {
680 if (sbp->sb_logsunit % sbp->sb_blocksize) {
681 xfs_notice(mp,
682 "log stripe unit 0x%x bytes must be a multiple of block size",
683 sbp->sb_logsunit);
684 return -EFSCORRUPTED;
685 }
686 if (sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE) {
687 xfs_notice(mp,
688 "log stripe unit 0x%x bytes over maximum size (0x%x bytes)",
689 sbp->sb_logsunit, XLOG_MAX_RECORD_BSIZE);
690 return -EFSCORRUPTED;
691 }
692 }
693
694 if (!xfs_validate_rt_geometry(sbp)) {
695 xfs_notice(mp,
696 "realtime %sgeometry check failed",
697 sbp->sb_rblocks ? "" : "zeroed ");
698 return -EFSCORRUPTED;
699 }
700
701 /*
702 * Either (sb_unit and !hasdalign) or (!sb_unit and hasdalign)
703 * would imply the image is corrupted.
704 */
705 has_dalign = sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT;
706 if (!!sbp->sb_unit ^ has_dalign) {
707 xfs_notice(mp, "SB stripe alignment sanity check failed");
708 return -EFSCORRUPTED;
709 }
710
711 if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit),
712 XFS_FSB_TO_B(mp, sbp->sb_width), 0,
713 xfs_buf_daddr(bp) == XFS_SB_DADDR, false))
714 return -EFSCORRUPTED;
715
716 /*
717 * Currently only very few inode sizes are supported.
718 */
719 switch (sbp->sb_inodesize) {
720 case 256:
721 case 512:
722 case 1024:
723 case 2048:
724 break;
725 default:
726 xfs_warn(mp, "inode size of %d bytes not supported",
727 sbp->sb_inodesize);
728 return -ENOSYS;
729 }
730
731 return 0;
732 }
733
734 void
xfs_sb_quota_from_disk(struct xfs_sb * sbp)735 xfs_sb_quota_from_disk(struct xfs_sb *sbp)
736 {
737 if (xfs_sb_is_v5(sbp) &&
738 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) {
739 sbp->sb_uquotino = NULLFSINO;
740 sbp->sb_gquotino = NULLFSINO;
741 sbp->sb_pquotino = NULLFSINO;
742 return;
743 }
744
745 /*
746 * older mkfs doesn't initialize quota inodes to NULLFSINO. This
747 * leads to in-core values having two different values for a quota
748 * inode to be invalid: 0 and NULLFSINO. Change it to a single value
749 * NULLFSINO.
750 *
751 * Note that this change affect only the in-core values. These
752 * values are not written back to disk unless any quota information
753 * is written to the disk. Even in that case, sb_pquotino field is
754 * not written to disk unless the superblock supports pquotino.
755 */
756 if (sbp->sb_uquotino == 0)
757 sbp->sb_uquotino = NULLFSINO;
758 if (sbp->sb_gquotino == 0)
759 sbp->sb_gquotino = NULLFSINO;
760 if (sbp->sb_pquotino == 0)
761 sbp->sb_pquotino = NULLFSINO;
762
763 /*
764 * We need to do these manipilations only if we are working
765 * with an older version of on-disk superblock.
766 */
767 if (xfs_sb_is_v5(sbp))
768 return;
769
770 if (sbp->sb_qflags & XFS_OQUOTA_ENFD)
771 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
772 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD;
773 if (sbp->sb_qflags & XFS_OQUOTA_CHKD)
774 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
775 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD;
776 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD);
777
778 if (sbp->sb_qflags & XFS_PQUOTA_ACCT &&
779 sbp->sb_gquotino != NULLFSINO) {
780 /*
781 * In older version of superblock, on-disk superblock only
782 * has sb_gquotino, and in-core superblock has both sb_gquotino
783 * and sb_pquotino. But, only one of them is supported at any
784 * point of time. So, if PQUOTA is set in disk superblock,
785 * copy over sb_gquotino to sb_pquotino. The NULLFSINO test
786 * above is to make sure we don't do this twice and wipe them
787 * both out!
788 */
789 sbp->sb_pquotino = sbp->sb_gquotino;
790 sbp->sb_gquotino = NULLFSINO;
791 }
792 }
793
794 static void
__xfs_sb_from_disk(struct xfs_sb * to,struct xfs_dsb * from,bool convert_xquota)795 __xfs_sb_from_disk(
796 struct xfs_sb *to,
797 struct xfs_dsb *from,
798 bool convert_xquota)
799 {
800 to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
801 to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
802 to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
803 to->sb_rblocks = be64_to_cpu(from->sb_rblocks);
804 to->sb_rextents = be64_to_cpu(from->sb_rextents);
805 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
806 to->sb_logstart = be64_to_cpu(from->sb_logstart);
807 to->sb_rootino = be64_to_cpu(from->sb_rootino);
808 to->sb_rbmino = be64_to_cpu(from->sb_rbmino);
809 to->sb_rsumino = be64_to_cpu(from->sb_rsumino);
810 to->sb_rextsize = be32_to_cpu(from->sb_rextsize);
811 to->sb_agblocks = be32_to_cpu(from->sb_agblocks);
812 to->sb_agcount = be32_to_cpu(from->sb_agcount);
813 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks);
814 to->sb_logblocks = be32_to_cpu(from->sb_logblocks);
815 to->sb_versionnum = be16_to_cpu(from->sb_versionnum);
816 to->sb_sectsize = be16_to_cpu(from->sb_sectsize);
817 to->sb_inodesize = be16_to_cpu(from->sb_inodesize);
818 to->sb_inopblock = be16_to_cpu(from->sb_inopblock);
819 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
820 to->sb_blocklog = from->sb_blocklog;
821 to->sb_sectlog = from->sb_sectlog;
822 to->sb_inodelog = from->sb_inodelog;
823 to->sb_inopblog = from->sb_inopblog;
824 to->sb_agblklog = from->sb_agblklog;
825 to->sb_rextslog = from->sb_rextslog;
826 to->sb_inprogress = from->sb_inprogress;
827 to->sb_imax_pct = from->sb_imax_pct;
828 to->sb_icount = be64_to_cpu(from->sb_icount);
829 to->sb_ifree = be64_to_cpu(from->sb_ifree);
830 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks);
831 to->sb_frextents = be64_to_cpu(from->sb_frextents);
832 to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
833 to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
834 to->sb_qflags = be16_to_cpu(from->sb_qflags);
835 to->sb_flags = from->sb_flags;
836 to->sb_shared_vn = from->sb_shared_vn;
837 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt);
838 to->sb_unit = be32_to_cpu(from->sb_unit);
839 to->sb_width = be32_to_cpu(from->sb_width);
840 to->sb_dirblklog = from->sb_dirblklog;
841 to->sb_logsectlog = from->sb_logsectlog;
842 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize);
843 to->sb_logsunit = be32_to_cpu(from->sb_logsunit);
844 to->sb_features2 = be32_to_cpu(from->sb_features2);
845 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2);
846 to->sb_features_compat = be32_to_cpu(from->sb_features_compat);
847 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat);
848 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat);
849 to->sb_features_log_incompat =
850 be32_to_cpu(from->sb_features_log_incompat);
851 /* crc is only used on disk, not in memory; just init to 0 here. */
852 to->sb_crc = 0;
853 to->sb_spino_align = be32_to_cpu(from->sb_spino_align);
854 to->sb_pquotino = be64_to_cpu(from->sb_pquotino);
855 to->sb_lsn = be64_to_cpu(from->sb_lsn);
856 /*
857 * sb_meta_uuid is only on disk if it differs from sb_uuid and the
858 * feature flag is set; if not set we keep it only in memory.
859 */
860 if (xfs_sb_is_v5(to) &&
861 (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID))
862 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
863 else
864 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid);
865 /* Convert on-disk flags to in-memory flags? */
866 if (convert_xquota)
867 xfs_sb_quota_from_disk(to);
868
869 if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) {
870 to->sb_metadirino = be64_to_cpu(from->sb_metadirino);
871 to->sb_rgblklog = from->sb_rgblklog;
872 memcpy(to->sb_pad, from->sb_pad, sizeof(to->sb_pad));
873 to->sb_rgcount = be32_to_cpu(from->sb_rgcount);
874 to->sb_rgextents = be32_to_cpu(from->sb_rgextents);
875 to->sb_rbmino = NULLFSINO;
876 to->sb_rsumino = NULLFSINO;
877 } else {
878 to->sb_metadirino = NULLFSINO;
879 to->sb_rgcount = 1;
880 to->sb_rgextents = 0;
881 }
882
883 if (to->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) {
884 to->sb_rtstart = be64_to_cpu(from->sb_rtstart);
885 to->sb_rtreserved = be64_to_cpu(from->sb_rtreserved);
886 } else {
887 to->sb_rtstart = 0;
888 to->sb_rtreserved = 0;
889 }
890 }
891
892 void
xfs_sb_from_disk(struct xfs_sb * to,struct xfs_dsb * from)893 xfs_sb_from_disk(
894 struct xfs_sb *to,
895 struct xfs_dsb *from)
896 {
897 __xfs_sb_from_disk(to, from, true);
898 }
899
900 static void
xfs_sb_quota_to_disk(struct xfs_dsb * to,struct xfs_sb * from)901 xfs_sb_quota_to_disk(
902 struct xfs_dsb *to,
903 struct xfs_sb *from)
904 {
905 uint16_t qflags = from->sb_qflags;
906
907 if (xfs_sb_is_v5(from) &&
908 (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) {
909 to->sb_qflags = cpu_to_be16(from->sb_qflags);
910 to->sb_uquotino = cpu_to_be64(0);
911 to->sb_gquotino = cpu_to_be64(0);
912 to->sb_pquotino = cpu_to_be64(0);
913 return;
914 }
915
916 to->sb_uquotino = cpu_to_be64(from->sb_uquotino);
917
918 /*
919 * The in-memory superblock quota state matches the v5 on-disk format so
920 * just write them out and return
921 */
922 if (xfs_sb_is_v5(from)) {
923 to->sb_qflags = cpu_to_be16(from->sb_qflags);
924 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
925 to->sb_pquotino = cpu_to_be64(from->sb_pquotino);
926 return;
927 }
928
929 /*
930 * For older superblocks (v4), the in-core version of sb_qflags do not
931 * have XFS_OQUOTA_* flags, whereas the on-disk version does. So,
932 * convert incore XFS_{PG}QUOTA_* flags to on-disk XFS_OQUOTA_* flags.
933 */
934 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD |
935 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD);
936
937 if (from->sb_qflags &
938 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD))
939 qflags |= XFS_OQUOTA_ENFD;
940 if (from->sb_qflags &
941 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD))
942 qflags |= XFS_OQUOTA_CHKD;
943 to->sb_qflags = cpu_to_be16(qflags);
944
945 /*
946 * GQUOTINO and PQUOTINO cannot be used together in versions
947 * of superblock that do not have pquotino. from->sb_flags
948 * tells us which quota is active and should be copied to
949 * disk. If neither are active, we should NULL the inode.
950 *
951 * In all cases, the separate pquotino must remain 0 because it
952 * is beyond the "end" of the valid non-pquotino superblock.
953 */
954 if (from->sb_qflags & XFS_GQUOTA_ACCT)
955 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
956 else if (from->sb_qflags & XFS_PQUOTA_ACCT)
957 to->sb_gquotino = cpu_to_be64(from->sb_pquotino);
958 else {
959 /*
960 * We can't rely on just the fields being logged to tell us
961 * that it is safe to write NULLFSINO - we should only do that
962 * if quotas are not actually enabled. Hence only write
963 * NULLFSINO if both in-core quota inodes are NULL.
964 */
965 if (from->sb_gquotino == NULLFSINO &&
966 from->sb_pquotino == NULLFSINO)
967 to->sb_gquotino = cpu_to_be64(NULLFSINO);
968 }
969
970 to->sb_pquotino = 0;
971 }
972
973 void
xfs_sb_to_disk(struct xfs_dsb * to,struct xfs_sb * from)974 xfs_sb_to_disk(
975 struct xfs_dsb *to,
976 struct xfs_sb *from)
977 {
978 xfs_sb_quota_to_disk(to, from);
979
980 to->sb_magicnum = cpu_to_be32(from->sb_magicnum);
981 to->sb_blocksize = cpu_to_be32(from->sb_blocksize);
982 to->sb_dblocks = cpu_to_be64(from->sb_dblocks);
983 to->sb_rblocks = cpu_to_be64(from->sb_rblocks);
984 to->sb_rextents = cpu_to_be64(from->sb_rextents);
985 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
986 to->sb_logstart = cpu_to_be64(from->sb_logstart);
987 to->sb_rootino = cpu_to_be64(from->sb_rootino);
988 to->sb_rbmino = cpu_to_be64(from->sb_rbmino);
989 to->sb_rsumino = cpu_to_be64(from->sb_rsumino);
990 to->sb_rextsize = cpu_to_be32(from->sb_rextsize);
991 to->sb_agblocks = cpu_to_be32(from->sb_agblocks);
992 to->sb_agcount = cpu_to_be32(from->sb_agcount);
993 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks);
994 to->sb_logblocks = cpu_to_be32(from->sb_logblocks);
995 to->sb_versionnum = cpu_to_be16(from->sb_versionnum);
996 to->sb_sectsize = cpu_to_be16(from->sb_sectsize);
997 to->sb_inodesize = cpu_to_be16(from->sb_inodesize);
998 to->sb_inopblock = cpu_to_be16(from->sb_inopblock);
999 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
1000 to->sb_blocklog = from->sb_blocklog;
1001 to->sb_sectlog = from->sb_sectlog;
1002 to->sb_inodelog = from->sb_inodelog;
1003 to->sb_inopblog = from->sb_inopblog;
1004 to->sb_agblklog = from->sb_agblklog;
1005 to->sb_rextslog = from->sb_rextslog;
1006 to->sb_inprogress = from->sb_inprogress;
1007 to->sb_imax_pct = from->sb_imax_pct;
1008 to->sb_icount = cpu_to_be64(from->sb_icount);
1009 to->sb_ifree = cpu_to_be64(from->sb_ifree);
1010 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks);
1011 to->sb_frextents = cpu_to_be64(from->sb_frextents);
1012
1013 to->sb_flags = from->sb_flags;
1014 to->sb_shared_vn = from->sb_shared_vn;
1015 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt);
1016 to->sb_unit = cpu_to_be32(from->sb_unit);
1017 to->sb_width = cpu_to_be32(from->sb_width);
1018 to->sb_dirblklog = from->sb_dirblklog;
1019 to->sb_logsectlog = from->sb_logsectlog;
1020 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize);
1021 to->sb_logsunit = cpu_to_be32(from->sb_logsunit);
1022
1023 /*
1024 * We need to ensure that bad_features2 always matches features2.
1025 * Hence we enforce that here rather than having to remember to do it
1026 * everywhere else that updates features2.
1027 */
1028 from->sb_bad_features2 = from->sb_features2;
1029 to->sb_features2 = cpu_to_be32(from->sb_features2);
1030 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2);
1031
1032 if (!xfs_sb_is_v5(from))
1033 return;
1034
1035 to->sb_features_compat = cpu_to_be32(from->sb_features_compat);
1036 to->sb_features_ro_compat =
1037 cpu_to_be32(from->sb_features_ro_compat);
1038 to->sb_features_incompat =
1039 cpu_to_be32(from->sb_features_incompat);
1040 to->sb_features_log_incompat =
1041 cpu_to_be32(from->sb_features_log_incompat);
1042 to->sb_spino_align = cpu_to_be32(from->sb_spino_align);
1043 to->sb_lsn = cpu_to_be64(from->sb_lsn);
1044 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID)
1045 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
1046
1047 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR) {
1048 to->sb_metadirino = cpu_to_be64(from->sb_metadirino);
1049 to->sb_rgblklog = from->sb_rgblklog;
1050 memset(to->sb_pad, 0, sizeof(to->sb_pad));
1051 to->sb_rgcount = cpu_to_be32(from->sb_rgcount);
1052 to->sb_rgextents = cpu_to_be32(from->sb_rgextents);
1053 to->sb_rbmino = cpu_to_be64(0);
1054 to->sb_rsumino = cpu_to_be64(0);
1055 }
1056
1057 if (from->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_ZONED) {
1058 to->sb_rtstart = cpu_to_be64(from->sb_rtstart);
1059 to->sb_rtreserved = cpu_to_be64(from->sb_rtreserved);
1060 }
1061 }
1062
1063 /*
1064 * If the superblock has the CRC feature bit set or the CRC field is non-null,
1065 * check that the CRC is valid. We check the CRC field is non-null because a
1066 * single bit error could clear the feature bit and unused parts of the
1067 * superblock are supposed to be zero. Hence a non-null crc field indicates that
1068 * we've potentially lost a feature bit and we should check it anyway.
1069 *
1070 * However, past bugs (i.e. in growfs) left non-zeroed regions beyond the
1071 * last field in V4 secondary superblocks. So for secondary superblocks,
1072 * we are more forgiving, and ignore CRC failures if the primary doesn't
1073 * indicate that the fs version is V5.
1074 */
1075 static void
xfs_sb_read_verify(struct xfs_buf * bp)1076 xfs_sb_read_verify(
1077 struct xfs_buf *bp)
1078 {
1079 struct xfs_sb sb;
1080 struct xfs_mount *mp = bp->b_mount;
1081 struct xfs_dsb *dsb = bp->b_addr;
1082 int error;
1083
1084 /*
1085 * open code the version check to avoid needing to convert the entire
1086 * superblock from disk order just to check the version number
1087 */
1088 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) &&
1089 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) ==
1090 XFS_SB_VERSION_5) ||
1091 dsb->sb_crc != 0)) {
1092
1093 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) {
1094 /* Only fail bad secondaries on a known V5 filesystem */
1095 if (xfs_buf_daddr(bp) == XFS_SB_DADDR ||
1096 xfs_has_crc(mp)) {
1097 error = -EFSBADCRC;
1098 goto out_error;
1099 }
1100 }
1101 }
1102
1103 /*
1104 * Check all the superblock fields. Don't byteswap the xquota flags
1105 * because _verify_common checks the on-disk values.
1106 */
1107 __xfs_sb_from_disk(&sb, dsb, false);
1108 error = xfs_validate_sb_common(mp, bp, &sb);
1109 if (error)
1110 goto out_error;
1111 error = xfs_validate_sb_read(mp, &sb);
1112
1113 out_error:
1114 if (error == -EFSCORRUPTED || error == -EFSBADCRC)
1115 xfs_verifier_error(bp, error, __this_address);
1116 else if (error)
1117 xfs_buf_ioerror(bp, error);
1118 }
1119
1120 /*
1121 * We may be probed for a filesystem match, so we may not want to emit
1122 * messages when the superblock buffer is not actually an XFS superblock.
1123 * If we find an XFS superblock, then run a normal, noisy mount because we are
1124 * really going to mount it and want to know about errors.
1125 */
1126 static void
xfs_sb_quiet_read_verify(struct xfs_buf * bp)1127 xfs_sb_quiet_read_verify(
1128 struct xfs_buf *bp)
1129 {
1130 struct xfs_dsb *dsb = bp->b_addr;
1131
1132 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) {
1133 /* XFS filesystem, verify noisily! */
1134 xfs_sb_read_verify(bp);
1135 return;
1136 }
1137 /* quietly fail */
1138 xfs_buf_ioerror(bp, -EWRONGFS);
1139 }
1140
1141 static void
xfs_sb_write_verify(struct xfs_buf * bp)1142 xfs_sb_write_verify(
1143 struct xfs_buf *bp)
1144 {
1145 struct xfs_sb sb;
1146 struct xfs_mount *mp = bp->b_mount;
1147 struct xfs_buf_log_item *bip = bp->b_log_item;
1148 struct xfs_dsb *dsb = bp->b_addr;
1149 int error;
1150
1151 /*
1152 * Check all the superblock fields. Don't byteswap the xquota flags
1153 * because _verify_common checks the on-disk values.
1154 */
1155 __xfs_sb_from_disk(&sb, dsb, false);
1156 error = xfs_validate_sb_common(mp, bp, &sb);
1157 if (error)
1158 goto out_error;
1159 error = xfs_validate_sb_write(mp, bp, &sb);
1160 if (error)
1161 goto out_error;
1162
1163 if (!xfs_sb_is_v5(&sb))
1164 return;
1165
1166 if (bip)
1167 dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
1168
1169 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF);
1170 return;
1171
1172 out_error:
1173 xfs_verifier_error(bp, error, __this_address);
1174 }
1175
1176 const struct xfs_buf_ops xfs_sb_buf_ops = {
1177 .name = "xfs_sb",
1178 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
1179 .verify_read = xfs_sb_read_verify,
1180 .verify_write = xfs_sb_write_verify,
1181 };
1182
1183 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
1184 .name = "xfs_sb_quiet",
1185 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
1186 .verify_read = xfs_sb_quiet_read_verify,
1187 .verify_write = xfs_sb_write_verify,
1188 };
1189
1190 /* Compute cached rt geometry from the incore sb. */
1191 void
xfs_sb_mount_rextsize(struct xfs_mount * mp,struct xfs_sb * sbp)1192 xfs_sb_mount_rextsize(
1193 struct xfs_mount *mp,
1194 struct xfs_sb *sbp)
1195 {
1196 struct xfs_groups *rgs = &mp->m_groups[XG_TYPE_RTG];
1197
1198 mp->m_rtxblklog = log2_if_power2(sbp->sb_rextsize);
1199 mp->m_rtxblkmask = mask64_if_power2(sbp->sb_rextsize);
1200
1201 if (xfs_sb_is_v5(sbp) &&
1202 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR)) {
1203 rgs->blocks = sbp->sb_rgextents * sbp->sb_rextsize;
1204 rgs->blklog = mp->m_sb.sb_rgblklog;
1205 rgs->blkmask = xfs_mask32lo(mp->m_sb.sb_rgblklog);
1206 rgs->start_fsb = mp->m_sb.sb_rtstart;
1207 if (xfs_sb_has_incompat_feature(sbp,
1208 XFS_SB_FEAT_INCOMPAT_ZONE_GAPS))
1209 rgs->has_daddr_gaps = true;
1210 } else {
1211 rgs->blocks = 0;
1212 rgs->blklog = 0;
1213 rgs->blkmask = (uint64_t)-1;
1214 }
1215 }
1216
1217 /* Update incore sb rt extent size, then recompute the cached rt geometry. */
1218 void
xfs_mount_sb_set_rextsize(struct xfs_mount * mp,struct xfs_sb * sbp,xfs_agblock_t rextsize)1219 xfs_mount_sb_set_rextsize(
1220 struct xfs_mount *mp,
1221 struct xfs_sb *sbp,
1222 xfs_agblock_t rextsize)
1223 {
1224 sbp->sb_rextsize = rextsize;
1225 if (xfs_sb_is_v5(sbp) &&
1226 (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_METADIR))
1227 sbp->sb_rgblklog = xfs_compute_rgblklog(sbp->sb_rgextents,
1228 rextsize);
1229
1230 xfs_sb_mount_rextsize(mp, sbp);
1231 }
1232
1233 /*
1234 * xfs_mount_common
1235 *
1236 * Mount initialization code establishing various mount
1237 * fields from the superblock associated with the given
1238 * mount structure.
1239 *
1240 * Inode geometry are calculated in xfs_ialloc_setup_geometry.
1241 */
1242 void
xfs_sb_mount_common(struct xfs_mount * mp,struct xfs_sb * sbp)1243 xfs_sb_mount_common(
1244 struct xfs_mount *mp,
1245 struct xfs_sb *sbp)
1246 {
1247 struct xfs_groups *ags = &mp->m_groups[XG_TYPE_AG];
1248
1249 mp->m_agfrotor = 0;
1250 atomic_set(&mp->m_agirotor, 0);
1251 mp->m_maxagi = mp->m_sb.sb_agcount;
1252 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
1253 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
1254 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
1255 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
1256 mp->m_blockmask = sbp->sb_blocksize - 1;
1257 mp->m_blockwsize = xfs_rtbmblock_size(sbp) >> XFS_WORDLOG;
1258 mp->m_rtx_per_rbmblock = mp->m_blockwsize << XFS_NBWORDLOG;
1259
1260 ags->blocks = mp->m_sb.sb_agblocks;
1261 ags->blklog = mp->m_sb.sb_agblklog;
1262 ags->blkmask = xfs_mask32lo(mp->m_sb.sb_agblklog);
1263
1264 xfs_sb_mount_rextsize(mp, sbp);
1265
1266 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, true);
1267 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, false);
1268 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
1269 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
1270
1271 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, true);
1272 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, false);
1273 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
1274 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2;
1275
1276 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, true);
1277 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(mp, sbp->sb_blocksize, false);
1278 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2;
1279 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2;
1280
1281 mp->m_rtrmap_mxr[0] = xfs_rtrmapbt_maxrecs(mp, sbp->sb_blocksize, true);
1282 mp->m_rtrmap_mxr[1] = xfs_rtrmapbt_maxrecs(mp, sbp->sb_blocksize, false);
1283 mp->m_rtrmap_mnr[0] = mp->m_rtrmap_mxr[0] / 2;
1284 mp->m_rtrmap_mnr[1] = mp->m_rtrmap_mxr[1] / 2;
1285
1286 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, true);
1287 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(mp, sbp->sb_blocksize, false);
1288 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2;
1289 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2;
1290
1291 mp->m_rtrefc_mxr[0] = xfs_rtrefcountbt_maxrecs(mp, sbp->sb_blocksize,
1292 true);
1293 mp->m_rtrefc_mxr[1] = xfs_rtrefcountbt_maxrecs(mp, sbp->sb_blocksize,
1294 false);
1295 mp->m_rtrefc_mnr[0] = mp->m_rtrefc_mxr[0] / 2;
1296 mp->m_rtrefc_mnr[1] = mp->m_rtrefc_mxr[1] / 2;
1297
1298 mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
1299 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
1300 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp);
1301 }
1302
1303 /*
1304 * xfs_log_sb() can be used to copy arbitrary changes to the in-core superblock
1305 * into the superblock buffer to be logged. It does not provide the higher
1306 * level of locking that is needed to protect the in-core superblock from
1307 * concurrent access.
1308 */
1309 void
xfs_log_sb(struct xfs_trans * tp)1310 xfs_log_sb(
1311 struct xfs_trans *tp)
1312 {
1313 struct xfs_mount *mp = tp->t_mountp;
1314 struct xfs_buf *bp = xfs_trans_getsb(tp);
1315
1316 /*
1317 * Lazy sb counters don't update the in-core superblock so do that now.
1318 * If this is at unmount, the counters will be exactly correct, but at
1319 * any other time they will only be ballpark correct because of
1320 * reservations that have been taken out percpu counters. If we have an
1321 * unclean shutdown, this will be corrected by log recovery rebuilding
1322 * the counters from the AGF block counts.
1323 */
1324 if (xfs_has_lazysbcount(mp)) {
1325 mp->m_sb.sb_icount = percpu_counter_sum_positive(&mp->m_icount);
1326 mp->m_sb.sb_ifree = min_t(uint64_t,
1327 percpu_counter_sum_positive(&mp->m_ifree),
1328 mp->m_sb.sb_icount);
1329 mp->m_sb.sb_fdblocks = xfs_sum_freecounter(mp, XC_FREE_BLOCKS);
1330 }
1331
1332 /*
1333 * sb_frextents was added to the lazy sb counters when the rt groups
1334 * feature was introduced. This counter can go negative due to the way
1335 * we handle nearly-lockless reservations, so we must use the _positive
1336 * variant here to avoid writing out nonsense frextents.
1337 */
1338 if (xfs_has_rtgroups(mp) && !xfs_has_zoned(mp)) {
1339 mp->m_sb.sb_frextents =
1340 xfs_sum_freecounter(mp, XC_FREE_RTEXTENTS);
1341 }
1342
1343 xfs_sb_to_disk(bp->b_addr, &mp->m_sb);
1344 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
1345 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1);
1346 }
1347
1348 /*
1349 * xfs_sync_sb
1350 *
1351 * Sync the superblock to disk.
1352 *
1353 * Note that the caller is responsible for checking the frozen state of the
1354 * filesystem. This procedure uses the non-blocking transaction allocator and
1355 * thus will allow modifications to a frozen fs. This is required because this
1356 * code can be called during the process of freezing where use of the high-level
1357 * allocator would deadlock.
1358 */
1359 int
xfs_sync_sb(struct xfs_mount * mp,bool wait)1360 xfs_sync_sb(
1361 struct xfs_mount *mp,
1362 bool wait)
1363 {
1364 struct xfs_trans *tp;
1365 int error;
1366
1367 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0,
1368 XFS_TRANS_NO_WRITECOUNT, &tp);
1369 if (error)
1370 return error;
1371
1372 xfs_log_sb(tp);
1373 if (wait)
1374 xfs_trans_set_sync(tp);
1375 return xfs_trans_commit(tp);
1376 }
1377
1378 /*
1379 * Update all the secondary superblocks to match the new state of the primary.
1380 * Because we are completely overwriting all the existing fields in the
1381 * secondary superblock buffers, there is no need to read them in from disk.
1382 * Just get a new buffer, stamp it and write it.
1383 *
1384 * The sb buffers need to be cached here so that we serialise against other
1385 * operations that access the secondary superblocks, but we don't want to keep
1386 * them in memory once it is written so we mark it as a one-shot buffer.
1387 */
1388 int
xfs_update_secondary_sbs(struct xfs_mount * mp)1389 xfs_update_secondary_sbs(
1390 struct xfs_mount *mp)
1391 {
1392 struct xfs_perag *pag = NULL;
1393 int saved_error = 0;
1394 int error = 0;
1395 LIST_HEAD (buffer_list);
1396
1397 /* update secondary superblocks. */
1398 while ((pag = xfs_perag_next_from(mp, pag, 1))) {
1399 struct xfs_buf *bp;
1400
1401 error = xfs_buf_get(mp->m_ddev_targp,
1402 XFS_AG_DADDR(mp, pag_agno(pag), XFS_SB_DADDR),
1403 XFS_FSS_TO_BB(mp, 1), &bp);
1404 /*
1405 * If we get an error reading or writing alternate superblocks,
1406 * continue. xfs_repair chooses the "best" superblock based
1407 * on most matches; if we break early, we'll leave more
1408 * superblocks un-updated than updated, and xfs_repair may
1409 * pick them over the properly-updated primary.
1410 */
1411 if (error) {
1412 xfs_warn(mp,
1413 "error allocating secondary superblock for ag %d",
1414 pag_agno(pag));
1415 if (!saved_error)
1416 saved_error = error;
1417 continue;
1418 }
1419
1420 bp->b_ops = &xfs_sb_buf_ops;
1421 xfs_buf_oneshot(bp);
1422 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
1423 xfs_sb_to_disk(bp->b_addr, &mp->m_sb);
1424 xfs_buf_delwri_queue(bp, &buffer_list);
1425 xfs_buf_relse(bp);
1426
1427 /* don't hold too many buffers at once */
1428 if (pag_agno(pag) % 16)
1429 continue;
1430
1431 error = xfs_buf_delwri_submit(&buffer_list);
1432 if (error) {
1433 xfs_warn(mp,
1434 "write error %d updating a secondary superblock near ag %d",
1435 error, pag_agno(pag));
1436 if (!saved_error)
1437 saved_error = error;
1438 continue;
1439 }
1440 }
1441 error = xfs_buf_delwri_submit(&buffer_list);
1442 if (error)
1443 xfs_warn(mp, "error %d writing secondary superblocks", error);
1444 return saved_error ? saved_error : error;
1445 }
1446
1447 /*
1448 * Same behavior as xfs_sync_sb, except that it is always synchronous and it
1449 * also writes the superblock buffer to disk sector 0 immediately.
1450 */
1451 int
xfs_sync_sb_buf(struct xfs_mount * mp,bool update_rtsb)1452 xfs_sync_sb_buf(
1453 struct xfs_mount *mp,
1454 bool update_rtsb)
1455 {
1456 struct xfs_trans *tp;
1457 struct xfs_buf *bp;
1458 struct xfs_buf *rtsb_bp = NULL;
1459 int error;
1460
1461 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp);
1462 if (error)
1463 return error;
1464
1465 bp = xfs_trans_getsb(tp);
1466 xfs_log_sb(tp);
1467 xfs_trans_bhold(tp, bp);
1468 if (update_rtsb) {
1469 rtsb_bp = xfs_log_rtsb(tp, bp);
1470 if (rtsb_bp)
1471 xfs_trans_bhold(tp, rtsb_bp);
1472 }
1473 xfs_trans_set_sync(tp);
1474 error = xfs_trans_commit(tp);
1475 if (error)
1476 goto out;
1477 /*
1478 * write out the sb buffer to get the changes to disk
1479 */
1480 error = xfs_bwrite(bp);
1481 if (!error && rtsb_bp)
1482 error = xfs_bwrite(rtsb_bp);
1483 out:
1484 if (rtsb_bp)
1485 xfs_buf_relse(rtsb_bp);
1486 xfs_buf_relse(bp);
1487 return error;
1488 }
1489
1490 void
xfs_fs_geometry(struct xfs_mount * mp,struct xfs_fsop_geom * geo,int struct_version)1491 xfs_fs_geometry(
1492 struct xfs_mount *mp,
1493 struct xfs_fsop_geom *geo,
1494 int struct_version)
1495 {
1496 struct xfs_sb *sbp = &mp->m_sb;
1497
1498 memset(geo, 0, sizeof(struct xfs_fsop_geom));
1499
1500 geo->blocksize = sbp->sb_blocksize;
1501 geo->rtextsize = sbp->sb_rextsize;
1502 geo->agblocks = sbp->sb_agblocks;
1503 geo->agcount = sbp->sb_agcount;
1504 geo->logblocks = sbp->sb_logblocks;
1505 geo->sectsize = sbp->sb_sectsize;
1506 geo->inodesize = sbp->sb_inodesize;
1507 geo->imaxpct = sbp->sb_imax_pct;
1508 geo->datablocks = sbp->sb_dblocks;
1509 geo->rtblocks = sbp->sb_rblocks;
1510 geo->rtextents = sbp->sb_rextents;
1511 geo->logstart = sbp->sb_logstart;
1512 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid));
1513 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid));
1514
1515 if (struct_version < 2)
1516 return;
1517
1518 geo->sunit = sbp->sb_unit;
1519 geo->swidth = sbp->sb_width;
1520
1521 if (struct_version < 3)
1522 return;
1523
1524 geo->version = XFS_FSOP_GEOM_VERSION;
1525 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
1526 XFS_FSOP_GEOM_FLAGS_DIRV2 |
1527 XFS_FSOP_GEOM_FLAGS_EXTFLG;
1528 if (xfs_has_attr(mp))
1529 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR;
1530 if (xfs_has_quota(mp))
1531 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA;
1532 if (xfs_has_align(mp))
1533 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN;
1534 if (xfs_has_dalign(mp))
1535 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN;
1536 if (xfs_has_asciici(mp))
1537 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI;
1538 if (xfs_has_lazysbcount(mp))
1539 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB;
1540 if (xfs_has_attr2(mp))
1541 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2;
1542 if (xfs_has_projid32(mp))
1543 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32;
1544 if (xfs_has_crc(mp))
1545 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB;
1546 if (xfs_has_ftype(mp))
1547 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE;
1548 if (xfs_has_finobt(mp))
1549 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT;
1550 if (xfs_has_sparseinodes(mp))
1551 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES;
1552 if (xfs_has_rmapbt(mp))
1553 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT;
1554 if (xfs_has_reflink(mp))
1555 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK;
1556 if (xfs_has_bigtime(mp))
1557 geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME;
1558 if (xfs_has_inobtcounts(mp))
1559 geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT;
1560 if (xfs_has_parent(mp))
1561 geo->flags |= XFS_FSOP_GEOM_FLAGS_PARENT;
1562 if (xfs_has_sector(mp)) {
1563 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
1564 geo->logsectsize = sbp->sb_logsectsize;
1565 } else {
1566 geo->logsectsize = BBSIZE;
1567 }
1568 if (xfs_has_large_extent_counts(mp))
1569 geo->flags |= XFS_FSOP_GEOM_FLAGS_NREXT64;
1570 if (xfs_has_exchange_range(mp))
1571 geo->flags |= XFS_FSOP_GEOM_FLAGS_EXCHANGE_RANGE;
1572 if (xfs_has_metadir(mp))
1573 geo->flags |= XFS_FSOP_GEOM_FLAGS_METADIR;
1574 if (xfs_has_zoned(mp))
1575 geo->flags |= XFS_FSOP_GEOM_FLAGS_ZONED;
1576 geo->rtsectsize = sbp->sb_blocksize;
1577 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
1578
1579 if (struct_version < 4)
1580 return;
1581
1582 if (xfs_has_logv2(mp))
1583 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2;
1584
1585 geo->logsunit = sbp->sb_logsunit;
1586
1587 if (struct_version < 5)
1588 return;
1589
1590 geo->version = XFS_FSOP_GEOM_VERSION_V5;
1591
1592 if (xfs_has_rtgroups(mp)) {
1593 geo->rgcount = sbp->sb_rgcount;
1594 geo->rgextents = sbp->sb_rgextents;
1595 }
1596 if (xfs_has_zoned(mp)) {
1597 geo->rtstart = sbp->sb_rtstart;
1598 geo->rtreserved = sbp->sb_rtreserved;
1599 }
1600 }
1601
1602 /* Read a secondary superblock. */
1603 int
xfs_sb_read_secondary(struct xfs_mount * mp,struct xfs_trans * tp,xfs_agnumber_t agno,struct xfs_buf ** bpp)1604 xfs_sb_read_secondary(
1605 struct xfs_mount *mp,
1606 struct xfs_trans *tp,
1607 xfs_agnumber_t agno,
1608 struct xfs_buf **bpp)
1609 {
1610 struct xfs_buf *bp;
1611 int error;
1612
1613 ASSERT(agno != 0 && agno != NULLAGNUMBER);
1614 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
1615 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
1616 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops);
1617 if (xfs_metadata_is_sick(error))
1618 xfs_agno_mark_sick(mp, agno, XFS_SICK_AG_SB);
1619 if (error)
1620 return error;
1621 xfs_buf_set_ref(bp, XFS_SSB_REF);
1622 *bpp = bp;
1623 return 0;
1624 }
1625
1626 /* Get an uninitialised secondary superblock buffer. */
1627 int
xfs_sb_get_secondary(struct xfs_mount * mp,struct xfs_trans * tp,xfs_agnumber_t agno,struct xfs_buf ** bpp)1628 xfs_sb_get_secondary(
1629 struct xfs_mount *mp,
1630 struct xfs_trans *tp,
1631 xfs_agnumber_t agno,
1632 struct xfs_buf **bpp)
1633 {
1634 struct xfs_buf *bp;
1635 int error;
1636
1637 ASSERT(agno != 0 && agno != NULLAGNUMBER);
1638 error = xfs_trans_get_buf(tp, mp->m_ddev_targp,
1639 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
1640 XFS_FSS_TO_BB(mp, 1), 0, &bp);
1641 if (error)
1642 return error;
1643 bp->b_ops = &xfs_sb_buf_ops;
1644 xfs_buf_oneshot(bp);
1645 *bpp = bp;
1646 return 0;
1647 }
1648
1649 /*
1650 * sunit, swidth, sectorsize(optional with 0) should be all in bytes, so users
1651 * won't be confused by values in error messages. This function returns false
1652 * if the stripe geometry is invalid and the caller is unable to repair the
1653 * stripe configuration later in the mount process.
1654 */
1655 bool
xfs_validate_stripe_geometry(struct xfs_mount * mp,__s64 sunit,__s64 swidth,int sectorsize,bool may_repair,bool silent)1656 xfs_validate_stripe_geometry(
1657 struct xfs_mount *mp,
1658 __s64 sunit,
1659 __s64 swidth,
1660 int sectorsize,
1661 bool may_repair,
1662 bool silent)
1663 {
1664 if (swidth > INT_MAX) {
1665 if (!silent)
1666 xfs_notice(mp,
1667 "stripe width (%lld) is too large", swidth);
1668 goto check_override;
1669 }
1670
1671 if (sunit > swidth) {
1672 if (!silent)
1673 xfs_notice(mp,
1674 "stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth);
1675 goto check_override;
1676 }
1677
1678 if (sectorsize && (int)sunit % sectorsize) {
1679 if (!silent)
1680 xfs_notice(mp,
1681 "stripe unit (%lld) must be a multiple of the sector size (%d)",
1682 sunit, sectorsize);
1683 goto check_override;
1684 }
1685
1686 if (sunit && !swidth) {
1687 if (!silent)
1688 xfs_notice(mp,
1689 "invalid stripe unit (%lld) and stripe width of 0", sunit);
1690 goto check_override;
1691 }
1692
1693 if (!sunit && swidth) {
1694 if (!silent)
1695 xfs_notice(mp,
1696 "invalid stripe width (%lld) and stripe unit of 0", swidth);
1697 goto check_override;
1698 }
1699
1700 if (sunit && (int)swidth % (int)sunit) {
1701 if (!silent)
1702 xfs_notice(mp,
1703 "stripe width (%lld) must be a multiple of the stripe unit (%lld)",
1704 swidth, sunit);
1705 goto check_override;
1706 }
1707 return true;
1708
1709 check_override:
1710 if (!may_repair)
1711 return false;
1712 /*
1713 * During mount, mp->m_dalign will not be set unless the sunit mount
1714 * option was set. If it was set, ignore the bad stripe alignment values
1715 * and allow the validation and overwrite later in the mount process to
1716 * attempt to overwrite the bad stripe alignment values with the values
1717 * supplied by mount options.
1718 */
1719 if (!mp->m_dalign)
1720 return false;
1721 if (!silent)
1722 xfs_notice(mp,
1723 "Will try to correct with specified mount options sunit (%d) and swidth (%d)",
1724 BBTOB(mp->m_dalign), BBTOB(mp->m_swidth));
1725 return true;
1726 }
1727
1728 /*
1729 * Compute the maximum level number of the realtime summary file, as defined by
1730 * mkfs. The historic use of highbit32 on a 64-bit quantity prohibited correct
1731 * use of rt volumes with more than 2^32 extents.
1732 */
1733 uint8_t
xfs_compute_rextslog(xfs_rtbxlen_t rtextents)1734 xfs_compute_rextslog(
1735 xfs_rtbxlen_t rtextents)
1736 {
1737 if (!rtextents)
1738 return 0;
1739 return xfs_highbit64(rtextents);
1740 }
1741