1
2
3
4
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_trace.h"
19#include "xfs_trans.h"
20#include "xfs_buf_item.h"
21#include "xfs_bmap_btree.h"
22#include "xfs_alloc_btree.h"
23#include "xfs_log.h"
24#include "xfs_rmap_btree.h"
25#include "xfs_refcount_btree.h"
26#include "xfs_da_format.h"
27#include "xfs_health.h"
28
29
30
31
32
33
34
35
36
37
38struct xfs_perag *
39xfs_perag_get(
40 struct xfs_mount *mp,
41 xfs_agnumber_t agno)
42{
43 struct xfs_perag *pag;
44 int ref = 0;
45
46 rcu_read_lock();
47 pag = radix_tree_lookup(&mp->m_perag_tree, agno);
48 if (pag) {
49 ASSERT(atomic_read(&pag->pag_ref) >= 0);
50 ref = atomic_inc_return(&pag->pag_ref);
51 }
52 rcu_read_unlock();
53 trace_xfs_perag_get(mp, agno, ref, _RET_IP_);
54 return pag;
55}
56
57
58
59
60struct xfs_perag *
61xfs_perag_get_tag(
62 struct xfs_mount *mp,
63 xfs_agnumber_t first,
64 int tag)
65{
66 struct xfs_perag *pag;
67 int found;
68 int ref;
69
70 rcu_read_lock();
71 found = radix_tree_gang_lookup_tag(&mp->m_perag_tree,
72 (void **)&pag, first, 1, tag);
73 if (found <= 0) {
74 rcu_read_unlock();
75 return NULL;
76 }
77 ref = atomic_inc_return(&pag->pag_ref);
78 rcu_read_unlock();
79 trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_);
80 return pag;
81}
82
83void
84xfs_perag_put(
85 struct xfs_perag *pag)
86{
87 int ref;
88
89 ASSERT(atomic_read(&pag->pag_ref) > 0);
90 ref = atomic_dec_return(&pag->pag_ref);
91 trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_);
92}
93
94
95STATIC int
96xfs_validate_sb_read(
97 struct xfs_mount *mp,
98 struct xfs_sb *sbp)
99{
100 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5)
101 return 0;
102
103
104
105
106
107 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) {
108 xfs_warn(mp,
109"Superblock has unknown compatible features (0x%x) enabled.",
110 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN));
111 xfs_warn(mp,
112"Using a more recent kernel is recommended.");
113 }
114
115 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
116 xfs_alert(mp,
117"Superblock has unknown read-only compatible features (0x%x) enabled.",
118 (sbp->sb_features_ro_compat &
119 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
120 if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
121 xfs_warn(mp,
122"Attempted to mount read-only compatible filesystem read-write.");
123 xfs_warn(mp,
124"Filesystem can only be safely mounted read only.");
125
126 return -EINVAL;
127 }
128 }
129 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
130 xfs_warn(mp,
131"Superblock has unknown incompatible features (0x%x) enabled.",
132 (sbp->sb_features_incompat &
133 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
134 xfs_warn(mp,
135"Filesystem cannot be safely mounted by this kernel.");
136 return -EINVAL;
137 }
138
139 return 0;
140}
141
142
143STATIC int
144xfs_validate_sb_write(
145 struct xfs_mount *mp,
146 struct xfs_buf *bp,
147 struct xfs_sb *sbp)
148{
149
150
151
152
153
154
155
156
157
158
159 if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && !sbp->sb_inprogress &&
160 (sbp->sb_fdblocks > sbp->sb_dblocks ||
161 !xfs_verify_icount(mp, sbp->sb_icount) ||
162 sbp->sb_ifree > sbp->sb_icount)) {
163 xfs_warn(mp, "SB summary counter sanity check failed");
164 return -EFSCORRUPTED;
165 }
166
167 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5)
168 return 0;
169
170
171
172
173
174
175 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) {
176 xfs_warn(mp,
177"Corruption detected in superblock compatible features (0x%x)!",
178 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN));
179 return -EFSCORRUPTED;
180 }
181
182 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
183 xfs_alert(mp,
184"Corruption detected in superblock read-only compatible features (0x%x)!",
185 (sbp->sb_features_ro_compat &
186 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
187 return -EFSCORRUPTED;
188 }
189 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
190 xfs_warn(mp,
191"Corruption detected in superblock incompatible features (0x%x)!",
192 (sbp->sb_features_incompat &
193 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
194 return -EFSCORRUPTED;
195 }
196 if (xfs_sb_has_incompat_log_feature(sbp,
197 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) {
198 xfs_warn(mp,
199"Corruption detected in superblock incompatible log features (0x%x)!",
200 (sbp->sb_features_log_incompat &
201 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN));
202 return -EFSCORRUPTED;
203 }
204
205
206
207
208
209
210 if (!xfs_log_check_lsn(mp, sbp->sb_lsn))
211 return -EFSCORRUPTED;
212
213 return 0;
214}
215
216
217STATIC int
218xfs_validate_sb_common(
219 struct xfs_mount *mp,
220 struct xfs_buf *bp,
221 struct xfs_sb *sbp)
222{
223 struct xfs_dsb *dsb = bp->b_addr;
224 uint32_t agcount = 0;
225 uint32_t rem;
226
227 if (!xfs_verify_magic(bp, dsb->sb_magicnum)) {
228 xfs_warn(mp, "bad magic number");
229 return -EWRONGFS;
230 }
231
232 if (!xfs_sb_good_version(sbp)) {
233 xfs_warn(mp, "bad version");
234 return -EWRONGFS;
235 }
236
237 if (xfs_sb_version_has_pquotino(sbp)) {
238 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) {
239 xfs_notice(mp,
240 "Version 5 of Super block has XFS_OQUOTA bits.");
241 return -EFSCORRUPTED;
242 }
243 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
244 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
245 xfs_notice(mp,
246"Superblock earlier than Version 5 has XFS_{P|G}QUOTA_{ENFD|CHKD} bits.");
247 return -EFSCORRUPTED;
248 }
249
250
251
252
253
254
255 if (xfs_sb_version_hassparseinodes(sbp)) {
256 uint32_t align;
257
258 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize
259 >> sbp->sb_blocklog;
260 if (sbp->sb_inoalignmt != align) {
261 xfs_warn(mp,
262"Inode block alignment (%u) must match chunk size (%u) for sparse inodes.",
263 sbp->sb_inoalignmt, align);
264 return -EINVAL;
265 }
266 }
267
268 if (unlikely(
269 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
270 xfs_warn(mp,
271 "filesystem is marked as having an external log; "
272 "specify logdev on the mount command line.");
273 return -EINVAL;
274 }
275
276 if (unlikely(
277 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
278 xfs_warn(mp,
279 "filesystem is marked as having an internal log; "
280 "do not specify logdev on the mount command line.");
281 return -EINVAL;
282 }
283
284
285 if (sbp->sb_agblocks) {
286 agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem);
287 if (rem)
288 agcount++;
289 }
290
291
292
293
294
295 if (unlikely(
296 sbp->sb_agcount <= 0 ||
297 sbp->sb_sectsize < XFS_MIN_SECTORSIZE ||
298 sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
299 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
300 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
301 sbp->sb_sectsize != (1 << sbp->sb_sectlog) ||
302 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
303 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
304 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
305 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
306 sbp->sb_blocksize != (1 << sbp->sb_blocklog) ||
307 sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
308 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
309 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
310 sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
311 sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
312 sbp->sb_inodesize != (1 << sbp->sb_inodelog) ||
313 sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE ||
314 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) ||
315 XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES ||
316 XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES ||
317 sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 ||
318 agcount == 0 || agcount != sbp->sb_agcount ||
319 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
320 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
321 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
322 (sbp->sb_imax_pct > 100 ) ||
323 sbp->sb_dblocks == 0 ||
324 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
325 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) ||
326 sbp->sb_shared_vn != 0)) {
327 xfs_notice(mp, "SB sanity check failed");
328 return -EFSCORRUPTED;
329 }
330
331
332 if (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE ||
333 sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) {
334 xfs_notice(mp,
335 "realtime extent sanity check failed");
336 return -EFSCORRUPTED;
337 }
338
339 if (sbp->sb_rblocks == 0) {
340 if (sbp->sb_rextents != 0 || sbp->sb_rbmblocks != 0 ||
341 sbp->sb_rextslog != 0 || sbp->sb_frextents != 0) {
342 xfs_notice(mp,
343 "realtime zeroed geometry check failed");
344 return -EFSCORRUPTED;
345 }
346 } else {
347 uint64_t rexts;
348 uint64_t rbmblocks;
349
350 rexts = div_u64(sbp->sb_rblocks, sbp->sb_rextsize);
351 rbmblocks = howmany_64(sbp->sb_rextents,
352 NBBY * sbp->sb_blocksize);
353
354 if (sbp->sb_rextents != rexts ||
355 sbp->sb_rextslog != xfs_highbit32(sbp->sb_rextents) ||
356 sbp->sb_rbmblocks != rbmblocks) {
357 xfs_notice(mp,
358 "realtime geometry sanity check failed");
359 return -EFSCORRUPTED;
360 }
361 }
362
363
364
365
366
367 if (!!sbp->sb_unit ^ xfs_sb_version_hasdalign(sbp)) {
368 xfs_notice(mp, "SB stripe alignment sanity check failed");
369 return -EFSCORRUPTED;
370 }
371
372 if (!xfs_validate_stripe_geometry(mp, XFS_FSB_TO_B(mp, sbp->sb_unit),
373 XFS_FSB_TO_B(mp, sbp->sb_width), 0, false))
374 return -EFSCORRUPTED;
375
376 if (xfs_sb_version_hascrc(&mp->m_sb) &&
377 sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) {
378 xfs_notice(mp, "v5 SB sanity check failed");
379 return -EFSCORRUPTED;
380 }
381
382
383
384
385 switch (sbp->sb_inodesize) {
386 case 256:
387 case 512:
388 case 1024:
389 case 2048:
390 break;
391 default:
392 xfs_warn(mp, "inode size of %d bytes not supported",
393 sbp->sb_inodesize);
394 return -ENOSYS;
395 }
396
397 return 0;
398}
399
400void
401xfs_sb_quota_from_disk(struct xfs_sb *sbp)
402{
403
404
405
406
407
408
409
410
411
412
413
414 if (sbp->sb_uquotino == 0)
415 sbp->sb_uquotino = NULLFSINO;
416 if (sbp->sb_gquotino == 0)
417 sbp->sb_gquotino = NULLFSINO;
418 if (sbp->sb_pquotino == 0)
419 sbp->sb_pquotino = NULLFSINO;
420
421
422
423
424
425 if (xfs_sb_version_has_pquotino(sbp))
426 return;
427
428 if (sbp->sb_qflags & XFS_OQUOTA_ENFD)
429 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
430 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD;
431 if (sbp->sb_qflags & XFS_OQUOTA_CHKD)
432 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
433 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD;
434 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD);
435
436 if (sbp->sb_qflags & XFS_PQUOTA_ACCT &&
437 sbp->sb_gquotino != NULLFSINO) {
438
439
440
441
442
443
444
445
446
447 sbp->sb_pquotino = sbp->sb_gquotino;
448 sbp->sb_gquotino = NULLFSINO;
449 }
450}
451
452static void
453__xfs_sb_from_disk(
454 struct xfs_sb *to,
455 xfs_dsb_t *from,
456 bool convert_xquota)
457{
458 to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
459 to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
460 to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
461 to->sb_rblocks = be64_to_cpu(from->sb_rblocks);
462 to->sb_rextents = be64_to_cpu(from->sb_rextents);
463 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
464 to->sb_logstart = be64_to_cpu(from->sb_logstart);
465 to->sb_rootino = be64_to_cpu(from->sb_rootino);
466 to->sb_rbmino = be64_to_cpu(from->sb_rbmino);
467 to->sb_rsumino = be64_to_cpu(from->sb_rsumino);
468 to->sb_rextsize = be32_to_cpu(from->sb_rextsize);
469 to->sb_agblocks = be32_to_cpu(from->sb_agblocks);
470 to->sb_agcount = be32_to_cpu(from->sb_agcount);
471 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks);
472 to->sb_logblocks = be32_to_cpu(from->sb_logblocks);
473 to->sb_versionnum = be16_to_cpu(from->sb_versionnum);
474 to->sb_sectsize = be16_to_cpu(from->sb_sectsize);
475 to->sb_inodesize = be16_to_cpu(from->sb_inodesize);
476 to->sb_inopblock = be16_to_cpu(from->sb_inopblock);
477 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
478 to->sb_blocklog = from->sb_blocklog;
479 to->sb_sectlog = from->sb_sectlog;
480 to->sb_inodelog = from->sb_inodelog;
481 to->sb_inopblog = from->sb_inopblog;
482 to->sb_agblklog = from->sb_agblklog;
483 to->sb_rextslog = from->sb_rextslog;
484 to->sb_inprogress = from->sb_inprogress;
485 to->sb_imax_pct = from->sb_imax_pct;
486 to->sb_icount = be64_to_cpu(from->sb_icount);
487 to->sb_ifree = be64_to_cpu(from->sb_ifree);
488 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks);
489 to->sb_frextents = be64_to_cpu(from->sb_frextents);
490 to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
491 to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
492 to->sb_qflags = be16_to_cpu(from->sb_qflags);
493 to->sb_flags = from->sb_flags;
494 to->sb_shared_vn = from->sb_shared_vn;
495 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt);
496 to->sb_unit = be32_to_cpu(from->sb_unit);
497 to->sb_width = be32_to_cpu(from->sb_width);
498 to->sb_dirblklog = from->sb_dirblklog;
499 to->sb_logsectlog = from->sb_logsectlog;
500 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize);
501 to->sb_logsunit = be32_to_cpu(from->sb_logsunit);
502 to->sb_features2 = be32_to_cpu(from->sb_features2);
503 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2);
504 to->sb_features_compat = be32_to_cpu(from->sb_features_compat);
505 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat);
506 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat);
507 to->sb_features_log_incompat =
508 be32_to_cpu(from->sb_features_log_incompat);
509
510 to->sb_crc = 0;
511 to->sb_spino_align = be32_to_cpu(from->sb_spino_align);
512 to->sb_pquotino = be64_to_cpu(from->sb_pquotino);
513 to->sb_lsn = be64_to_cpu(from->sb_lsn);
514
515
516
517
518 if (xfs_sb_version_hasmetauuid(to))
519 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
520 else
521 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid);
522
523 if (convert_xquota)
524 xfs_sb_quota_from_disk(to);
525}
526
527void
528xfs_sb_from_disk(
529 struct xfs_sb *to,
530 xfs_dsb_t *from)
531{
532 __xfs_sb_from_disk(to, from, true);
533}
534
535static void
536xfs_sb_quota_to_disk(
537 struct xfs_dsb *to,
538 struct xfs_sb *from)
539{
540 uint16_t qflags = from->sb_qflags;
541
542 to->sb_uquotino = cpu_to_be64(from->sb_uquotino);
543 if (xfs_sb_version_has_pquotino(from)) {
544 to->sb_qflags = cpu_to_be16(from->sb_qflags);
545 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
546 to->sb_pquotino = cpu_to_be64(from->sb_pquotino);
547 return;
548 }
549
550
551
552
553
554
555 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD |
556 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD);
557
558 if (from->sb_qflags &
559 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD))
560 qflags |= XFS_OQUOTA_ENFD;
561 if (from->sb_qflags &
562 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD))
563 qflags |= XFS_OQUOTA_CHKD;
564 to->sb_qflags = cpu_to_be16(qflags);
565
566
567
568
569
570
571
572
573
574
575 if (from->sb_qflags & XFS_GQUOTA_ACCT)
576 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
577 else if (from->sb_qflags & XFS_PQUOTA_ACCT)
578 to->sb_gquotino = cpu_to_be64(from->sb_pquotino);
579 else {
580
581
582
583
584
585
586 if (from->sb_gquotino == NULLFSINO &&
587 from->sb_pquotino == NULLFSINO)
588 to->sb_gquotino = cpu_to_be64(NULLFSINO);
589 }
590
591 to->sb_pquotino = 0;
592}
593
594void
595xfs_sb_to_disk(
596 struct xfs_dsb *to,
597 struct xfs_sb *from)
598{
599 xfs_sb_quota_to_disk(to, from);
600
601 to->sb_magicnum = cpu_to_be32(from->sb_magicnum);
602 to->sb_blocksize = cpu_to_be32(from->sb_blocksize);
603 to->sb_dblocks = cpu_to_be64(from->sb_dblocks);
604 to->sb_rblocks = cpu_to_be64(from->sb_rblocks);
605 to->sb_rextents = cpu_to_be64(from->sb_rextents);
606 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
607 to->sb_logstart = cpu_to_be64(from->sb_logstart);
608 to->sb_rootino = cpu_to_be64(from->sb_rootino);
609 to->sb_rbmino = cpu_to_be64(from->sb_rbmino);
610 to->sb_rsumino = cpu_to_be64(from->sb_rsumino);
611 to->sb_rextsize = cpu_to_be32(from->sb_rextsize);
612 to->sb_agblocks = cpu_to_be32(from->sb_agblocks);
613 to->sb_agcount = cpu_to_be32(from->sb_agcount);
614 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks);
615 to->sb_logblocks = cpu_to_be32(from->sb_logblocks);
616 to->sb_versionnum = cpu_to_be16(from->sb_versionnum);
617 to->sb_sectsize = cpu_to_be16(from->sb_sectsize);
618 to->sb_inodesize = cpu_to_be16(from->sb_inodesize);
619 to->sb_inopblock = cpu_to_be16(from->sb_inopblock);
620 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
621 to->sb_blocklog = from->sb_blocklog;
622 to->sb_sectlog = from->sb_sectlog;
623 to->sb_inodelog = from->sb_inodelog;
624 to->sb_inopblog = from->sb_inopblog;
625 to->sb_agblklog = from->sb_agblklog;
626 to->sb_rextslog = from->sb_rextslog;
627 to->sb_inprogress = from->sb_inprogress;
628 to->sb_imax_pct = from->sb_imax_pct;
629 to->sb_icount = cpu_to_be64(from->sb_icount);
630 to->sb_ifree = cpu_to_be64(from->sb_ifree);
631 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks);
632 to->sb_frextents = cpu_to_be64(from->sb_frextents);
633
634 to->sb_flags = from->sb_flags;
635 to->sb_shared_vn = from->sb_shared_vn;
636 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt);
637 to->sb_unit = cpu_to_be32(from->sb_unit);
638 to->sb_width = cpu_to_be32(from->sb_width);
639 to->sb_dirblklog = from->sb_dirblklog;
640 to->sb_logsectlog = from->sb_logsectlog;
641 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize);
642 to->sb_logsunit = cpu_to_be32(from->sb_logsunit);
643
644
645
646
647
648
649 from->sb_bad_features2 = from->sb_features2;
650 to->sb_features2 = cpu_to_be32(from->sb_features2);
651 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2);
652
653 if (xfs_sb_version_hascrc(from)) {
654 to->sb_features_compat = cpu_to_be32(from->sb_features_compat);
655 to->sb_features_ro_compat =
656 cpu_to_be32(from->sb_features_ro_compat);
657 to->sb_features_incompat =
658 cpu_to_be32(from->sb_features_incompat);
659 to->sb_features_log_incompat =
660 cpu_to_be32(from->sb_features_log_incompat);
661 to->sb_spino_align = cpu_to_be32(from->sb_spino_align);
662 to->sb_lsn = cpu_to_be64(from->sb_lsn);
663 if (xfs_sb_version_hasmetauuid(from))
664 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
665 }
666}
667
668
669
670
671
672
673
674
675
676
677
678
679
680static void
681xfs_sb_read_verify(
682 struct xfs_buf *bp)
683{
684 struct xfs_sb sb;
685 struct xfs_mount *mp = bp->b_mount;
686 struct xfs_dsb *dsb = bp->b_addr;
687 int error;
688
689
690
691
692
693 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) &&
694 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) ==
695 XFS_SB_VERSION_5) ||
696 dsb->sb_crc != 0)) {
697
698 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) {
699
700 if (bp->b_bn == XFS_SB_DADDR ||
701 xfs_sb_version_hascrc(&mp->m_sb)) {
702 error = -EFSBADCRC;
703 goto out_error;
704 }
705 }
706 }
707
708
709
710
711
712 __xfs_sb_from_disk(&sb, dsb, false);
713 error = xfs_validate_sb_common(mp, bp, &sb);
714 if (error)
715 goto out_error;
716 error = xfs_validate_sb_read(mp, &sb);
717
718out_error:
719 if (error == -EFSCORRUPTED || error == -EFSBADCRC)
720 xfs_verifier_error(bp, error, __this_address);
721 else if (error)
722 xfs_buf_ioerror(bp, error);
723}
724
725
726
727
728
729
730
731static void
732xfs_sb_quiet_read_verify(
733 struct xfs_buf *bp)
734{
735 struct xfs_dsb *dsb = bp->b_addr;
736
737 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) {
738
739 xfs_sb_read_verify(bp);
740 return;
741 }
742
743 xfs_buf_ioerror(bp, -EWRONGFS);
744}
745
746static void
747xfs_sb_write_verify(
748 struct xfs_buf *bp)
749{
750 struct xfs_sb sb;
751 struct xfs_mount *mp = bp->b_mount;
752 struct xfs_buf_log_item *bip = bp->b_log_item;
753 struct xfs_dsb *dsb = bp->b_addr;
754 int error;
755
756
757
758
759
760 __xfs_sb_from_disk(&sb, dsb, false);
761 error = xfs_validate_sb_common(mp, bp, &sb);
762 if (error)
763 goto out_error;
764 error = xfs_validate_sb_write(mp, bp, &sb);
765 if (error)
766 goto out_error;
767
768 if (!xfs_sb_version_hascrc(&mp->m_sb))
769 return;
770
771 if (bip)
772 dsb->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
773
774 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF);
775 return;
776
777out_error:
778 xfs_verifier_error(bp, error, __this_address);
779}
780
781const struct xfs_buf_ops xfs_sb_buf_ops = {
782 .name = "xfs_sb",
783 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
784 .verify_read = xfs_sb_read_verify,
785 .verify_write = xfs_sb_write_verify,
786};
787
788const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
789 .name = "xfs_sb_quiet",
790 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
791 .verify_read = xfs_sb_quiet_read_verify,
792 .verify_write = xfs_sb_write_verify,
793};
794
795
796
797
798
799
800
801
802
803
804void
805xfs_sb_mount_common(
806 struct xfs_mount *mp,
807 struct xfs_sb *sbp)
808{
809 mp->m_agfrotor = mp->m_agirotor = 0;
810 mp->m_maxagi = mp->m_sb.sb_agcount;
811 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
812 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
813 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
814 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
815 mp->m_blockmask = sbp->sb_blocksize - 1;
816 mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
817 mp->m_blockwmask = mp->m_blockwsize - 1;
818
819 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
820 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
821 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
822 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
823
824 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
825 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
826 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
827 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2;
828
829 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1);
830 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0);
831 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2;
832 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2;
833
834 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true);
835 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false);
836 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2;
837 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2;
838
839 mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
840 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
841 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp);
842}
843
844
845
846
847
848
849
850
851
852int
853xfs_initialize_perag_data(
854 struct xfs_mount *mp,
855 xfs_agnumber_t agcount)
856{
857 xfs_agnumber_t index;
858 xfs_perag_t *pag;
859 xfs_sb_t *sbp = &mp->m_sb;
860 uint64_t ifree = 0;
861 uint64_t ialloc = 0;
862 uint64_t bfree = 0;
863 uint64_t bfreelst = 0;
864 uint64_t btree = 0;
865 uint64_t fdblocks;
866 int error = 0;
867
868 for (index = 0; index < agcount; index++) {
869
870
871
872
873
874 error = xfs_alloc_pagf_init(mp, NULL, index, 0);
875 if (error)
876 return error;
877
878 error = xfs_ialloc_pagi_init(mp, NULL, index);
879 if (error)
880 return error;
881 pag = xfs_perag_get(mp, index);
882 ifree += pag->pagi_freecount;
883 ialloc += pag->pagi_count;
884 bfree += pag->pagf_freeblks;
885 bfreelst += pag->pagf_flcount;
886 btree += pag->pagf_btreeblks;
887 xfs_perag_put(pag);
888 }
889 fdblocks = bfree + bfreelst + btree;
890
891
892
893
894
895
896
897 if (fdblocks > sbp->sb_dblocks || ifree > ialloc) {
898 xfs_alert(mp, "AGF corruption. Please run xfs_repair.");
899 error = -EFSCORRUPTED;
900 goto out;
901 }
902
903
904 spin_lock(&mp->m_sb_lock);
905 sbp->sb_ifree = ifree;
906 sbp->sb_icount = ialloc;
907 sbp->sb_fdblocks = fdblocks;
908 spin_unlock(&mp->m_sb_lock);
909
910 xfs_reinit_percpu_counters(mp);
911out:
912 xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS);
913 return error;
914}
915
916
917
918
919
920
921
922void
923xfs_log_sb(
924 struct xfs_trans *tp)
925{
926 struct xfs_mount *mp = tp->t_mountp;
927 struct xfs_buf *bp = xfs_trans_getsb(tp);
928
929
930
931
932
933
934
935
936
937 if (xfs_sb_version_haslazysbcount(&mp->m_sb)) {
938 mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
939 mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree);
940 mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks);
941 }
942
943 xfs_sb_to_disk(bp->b_addr, &mp->m_sb);
944 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
945 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1);
946}
947
948
949
950
951
952
953
954
955
956
957
958
959int
960xfs_sync_sb(
961 struct xfs_mount *mp,
962 bool wait)
963{
964 struct xfs_trans *tp;
965 int error;
966
967 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0,
968 XFS_TRANS_NO_WRITECOUNT, &tp);
969 if (error)
970 return error;
971
972 xfs_log_sb(tp);
973 if (wait)
974 xfs_trans_set_sync(tp);
975 return xfs_trans_commit(tp);
976}
977
978
979
980
981
982
983
984
985
986
987
988int
989xfs_update_secondary_sbs(
990 struct xfs_mount *mp)
991{
992 xfs_agnumber_t agno;
993 int saved_error = 0;
994 int error = 0;
995 LIST_HEAD (buffer_list);
996
997
998 for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) {
999 struct xfs_buf *bp;
1000
1001 error = xfs_buf_get(mp->m_ddev_targp,
1002 XFS_AG_DADDR(mp, agno, XFS_SB_DADDR),
1003 XFS_FSS_TO_BB(mp, 1), &bp);
1004
1005
1006
1007
1008
1009
1010
1011 if (error) {
1012 xfs_warn(mp,
1013 "error allocating secondary superblock for ag %d",
1014 agno);
1015 if (!saved_error)
1016 saved_error = error;
1017 continue;
1018 }
1019
1020 bp->b_ops = &xfs_sb_buf_ops;
1021 xfs_buf_oneshot(bp);
1022 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
1023 xfs_sb_to_disk(bp->b_addr, &mp->m_sb);
1024 xfs_buf_delwri_queue(bp, &buffer_list);
1025 xfs_buf_relse(bp);
1026
1027
1028 if (agno % 16)
1029 continue;
1030
1031 error = xfs_buf_delwri_submit(&buffer_list);
1032 if (error) {
1033 xfs_warn(mp,
1034 "write error %d updating a secondary superblock near ag %d",
1035 error, agno);
1036 if (!saved_error)
1037 saved_error = error;
1038 continue;
1039 }
1040 }
1041 error = xfs_buf_delwri_submit(&buffer_list);
1042 if (error) {
1043 xfs_warn(mp,
1044 "write error %d updating a secondary superblock near ag %d",
1045 error, agno);
1046 }
1047
1048 return saved_error ? saved_error : error;
1049}
1050
1051
1052
1053
1054
1055int
1056xfs_sync_sb_buf(
1057 struct xfs_mount *mp)
1058{
1059 struct xfs_trans *tp;
1060 struct xfs_buf *bp;
1061 int error;
1062
1063 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp);
1064 if (error)
1065 return error;
1066
1067 bp = xfs_trans_getsb(tp);
1068 xfs_log_sb(tp);
1069 xfs_trans_bhold(tp, bp);
1070 xfs_trans_set_sync(tp);
1071 error = xfs_trans_commit(tp);
1072 if (error)
1073 goto out;
1074
1075
1076
1077 error = xfs_bwrite(bp);
1078out:
1079 xfs_buf_relse(bp);
1080 return error;
1081}
1082
1083void
1084xfs_fs_geometry(
1085 struct xfs_sb *sbp,
1086 struct xfs_fsop_geom *geo,
1087 int struct_version)
1088{
1089 memset(geo, 0, sizeof(struct xfs_fsop_geom));
1090
1091 geo->blocksize = sbp->sb_blocksize;
1092 geo->rtextsize = sbp->sb_rextsize;
1093 geo->agblocks = sbp->sb_agblocks;
1094 geo->agcount = sbp->sb_agcount;
1095 geo->logblocks = sbp->sb_logblocks;
1096 geo->sectsize = sbp->sb_sectsize;
1097 geo->inodesize = sbp->sb_inodesize;
1098 geo->imaxpct = sbp->sb_imax_pct;
1099 geo->datablocks = sbp->sb_dblocks;
1100 geo->rtblocks = sbp->sb_rblocks;
1101 geo->rtextents = sbp->sb_rextents;
1102 geo->logstart = sbp->sb_logstart;
1103 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid));
1104 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid));
1105
1106 if (struct_version < 2)
1107 return;
1108
1109 geo->sunit = sbp->sb_unit;
1110 geo->swidth = sbp->sb_width;
1111
1112 if (struct_version < 3)
1113 return;
1114
1115 geo->version = XFS_FSOP_GEOM_VERSION;
1116 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
1117 XFS_FSOP_GEOM_FLAGS_DIRV2 |
1118 XFS_FSOP_GEOM_FLAGS_EXTFLG;
1119 if (xfs_sb_version_hasattr(sbp))
1120 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR;
1121 if (xfs_sb_version_hasquota(sbp))
1122 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA;
1123 if (xfs_sb_version_hasalign(sbp))
1124 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN;
1125 if (xfs_sb_version_hasdalign(sbp))
1126 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN;
1127 if (xfs_sb_version_hassector(sbp))
1128 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
1129 if (xfs_sb_version_hasasciici(sbp))
1130 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI;
1131 if (xfs_sb_version_haslazysbcount(sbp))
1132 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB;
1133 if (xfs_sb_version_hasattr2(sbp))
1134 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2;
1135 if (xfs_sb_version_hasprojid32bit(sbp))
1136 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32;
1137 if (xfs_sb_version_hascrc(sbp))
1138 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB;
1139 if (xfs_sb_version_hasftype(sbp))
1140 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE;
1141 if (xfs_sb_version_hasfinobt(sbp))
1142 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT;
1143 if (xfs_sb_version_hassparseinodes(sbp))
1144 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES;
1145 if (xfs_sb_version_hasrmapbt(sbp))
1146 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT;
1147 if (xfs_sb_version_hasreflink(sbp))
1148 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK;
1149 if (xfs_sb_version_hasbigtime(sbp))
1150 geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME;
1151 if (xfs_sb_version_hasinobtcounts(sbp))
1152 geo->flags |= XFS_FSOP_GEOM_FLAGS_INOBTCNT;
1153 if (xfs_sb_version_hassector(sbp))
1154 geo->logsectsize = sbp->sb_logsectsize;
1155 else
1156 geo->logsectsize = BBSIZE;
1157 geo->rtsectsize = sbp->sb_blocksize;
1158 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
1159
1160 if (struct_version < 4)
1161 return;
1162
1163 if (xfs_sb_version_haslogv2(sbp))
1164 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2;
1165
1166 geo->logsunit = sbp->sb_logsunit;
1167
1168 if (struct_version < 5)
1169 return;
1170
1171 geo->version = XFS_FSOP_GEOM_VERSION_V5;
1172}
1173
1174
1175int
1176xfs_sb_read_secondary(
1177 struct xfs_mount *mp,
1178 struct xfs_trans *tp,
1179 xfs_agnumber_t agno,
1180 struct xfs_buf **bpp)
1181{
1182 struct xfs_buf *bp;
1183 int error;
1184
1185 ASSERT(agno != 0 && agno != NULLAGNUMBER);
1186 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
1187 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
1188 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops);
1189 if (error)
1190 return error;
1191 xfs_buf_set_ref(bp, XFS_SSB_REF);
1192 *bpp = bp;
1193 return 0;
1194}
1195
1196
1197int
1198xfs_sb_get_secondary(
1199 struct xfs_mount *mp,
1200 struct xfs_trans *tp,
1201 xfs_agnumber_t agno,
1202 struct xfs_buf **bpp)
1203{
1204 struct xfs_buf *bp;
1205 int error;
1206
1207 ASSERT(agno != 0 && agno != NULLAGNUMBER);
1208 error = xfs_trans_get_buf(tp, mp->m_ddev_targp,
1209 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
1210 XFS_FSS_TO_BB(mp, 1), 0, &bp);
1211 if (error)
1212 return error;
1213 bp->b_ops = &xfs_sb_buf_ops;
1214 xfs_buf_oneshot(bp);
1215 *bpp = bp;
1216 return 0;
1217}
1218
1219
1220
1221
1222
1223bool
1224xfs_validate_stripe_geometry(
1225 struct xfs_mount *mp,
1226 __s64 sunit,
1227 __s64 swidth,
1228 int sectorsize,
1229 bool silent)
1230{
1231 if (swidth > INT_MAX) {
1232 if (!silent)
1233 xfs_notice(mp,
1234"stripe width (%lld) is too large", swidth);
1235 return false;
1236 }
1237
1238 if (sunit > swidth) {
1239 if (!silent)
1240 xfs_notice(mp,
1241"stripe unit (%lld) is larger than the stripe width (%lld)", sunit, swidth);
1242 return false;
1243 }
1244
1245 if (sectorsize && (int)sunit % sectorsize) {
1246 if (!silent)
1247 xfs_notice(mp,
1248"stripe unit (%lld) must be a multiple of the sector size (%d)",
1249 sunit, sectorsize);
1250 return false;
1251 }
1252
1253 if (sunit && !swidth) {
1254 if (!silent)
1255 xfs_notice(mp,
1256"invalid stripe unit (%lld) and stripe width of 0", sunit);
1257 return false;
1258 }
1259
1260 if (!sunit && swidth) {
1261 if (!silent)
1262 xfs_notice(mp,
1263"invalid stripe width (%lld) and stripe unit of 0", swidth);
1264 return false;
1265 }
1266
1267 if (sunit && (int)swidth % (int)sunit) {
1268 if (!silent)
1269 xfs_notice(mp,
1270"stripe width (%lld) must be a multiple of the stripe unit (%lld)",
1271 swidth, sunit);
1272 return false;
1273 }
1274 return true;
1275}
1276