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_inode.h"
16#include "xfs_dir2.h"
17#include "xfs_ialloc.h"
18#include "xfs_alloc.h"
19#include "xfs_rtalloc.h"
20#include "xfs_bmap.h"
21#include "xfs_trans.h"
22#include "xfs_trans_priv.h"
23#include "xfs_log.h"
24#include "xfs_error.h"
25#include "xfs_quota.h"
26#include "xfs_fsops.h"
27#include "xfs_icache.h"
28#include "xfs_sysfs.h"
29#include "xfs_rmap_btree.h"
30#include "xfs_refcount_btree.h"
31#include "xfs_reflink.h"
32#include "xfs_extent_busy.h"
33#include "xfs_health.h"
34#include "xfs_trace.h"
35
36static DEFINE_MUTEX(xfs_uuid_table_mutex);
37static int xfs_uuid_table_size;
38static uuid_t *xfs_uuid_table;
39
40void
41xfs_uuid_table_free(void)
42{
43 if (xfs_uuid_table_size == 0)
44 return;
45 kmem_free(xfs_uuid_table);
46 xfs_uuid_table = NULL;
47 xfs_uuid_table_size = 0;
48}
49
50
51
52
53
54STATIC int
55xfs_uuid_mount(
56 struct xfs_mount *mp)
57{
58 uuid_t *uuid = &mp->m_sb.sb_uuid;
59 int hole, i;
60
61
62 uuid_copy(&mp->m_super->s_uuid, uuid);
63
64 if (mp->m_flags & XFS_MOUNT_NOUUID)
65 return 0;
66
67 if (uuid_is_null(uuid)) {
68 xfs_warn(mp, "Filesystem has null UUID - can't mount");
69 return -EINVAL;
70 }
71
72 mutex_lock(&xfs_uuid_table_mutex);
73 for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) {
74 if (uuid_is_null(&xfs_uuid_table[i])) {
75 hole = i;
76 continue;
77 }
78 if (uuid_equal(uuid, &xfs_uuid_table[i]))
79 goto out_duplicate;
80 }
81
82 if (hole < 0) {
83 xfs_uuid_table = kmem_realloc(xfs_uuid_table,
84 (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table),
85 0);
86 hole = xfs_uuid_table_size++;
87 }
88 xfs_uuid_table[hole] = *uuid;
89 mutex_unlock(&xfs_uuid_table_mutex);
90
91 return 0;
92
93 out_duplicate:
94 mutex_unlock(&xfs_uuid_table_mutex);
95 xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid);
96 return -EINVAL;
97}
98
99STATIC void
100xfs_uuid_unmount(
101 struct xfs_mount *mp)
102{
103 uuid_t *uuid = &mp->m_sb.sb_uuid;
104 int i;
105
106 if (mp->m_flags & XFS_MOUNT_NOUUID)
107 return;
108
109 mutex_lock(&xfs_uuid_table_mutex);
110 for (i = 0; i < xfs_uuid_table_size; i++) {
111 if (uuid_is_null(&xfs_uuid_table[i]))
112 continue;
113 if (!uuid_equal(uuid, &xfs_uuid_table[i]))
114 continue;
115 memset(&xfs_uuid_table[i], 0, sizeof(uuid_t));
116 break;
117 }
118 ASSERT(i < xfs_uuid_table_size);
119 mutex_unlock(&xfs_uuid_table_mutex);
120}
121
122
123STATIC void
124__xfs_free_perag(
125 struct rcu_head *head)
126{
127 struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head);
128
129 ASSERT(atomic_read(&pag->pag_ref) == 0);
130 kmem_free(pag);
131}
132
133
134
135
136STATIC void
137xfs_free_perag(
138 xfs_mount_t *mp)
139{
140 xfs_agnumber_t agno;
141 struct xfs_perag *pag;
142
143 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
144 spin_lock(&mp->m_perag_lock);
145 pag = radix_tree_delete(&mp->m_perag_tree, agno);
146 spin_unlock(&mp->m_perag_lock);
147 ASSERT(pag);
148 ASSERT(atomic_read(&pag->pag_ref) == 0);
149 xfs_iunlink_destroy(pag);
150 xfs_buf_hash_destroy(pag);
151 call_rcu(&pag->rcu_head, __xfs_free_perag);
152 }
153}
154
155
156
157
158
159int
160xfs_sb_validate_fsb_count(
161 xfs_sb_t *sbp,
162 uint64_t nblocks)
163{
164 ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
165 ASSERT(sbp->sb_blocklog >= BBSHIFT);
166
167
168 if (nblocks >> (PAGE_SHIFT - sbp->sb_blocklog) > ULONG_MAX)
169 return -EFBIG;
170 return 0;
171}
172
173int
174xfs_initialize_perag(
175 xfs_mount_t *mp,
176 xfs_agnumber_t agcount,
177 xfs_agnumber_t *maxagi)
178{
179 xfs_agnumber_t index;
180 xfs_agnumber_t first_initialised = NULLAGNUMBER;
181 xfs_perag_t *pag;
182 int error = -ENOMEM;
183
184
185
186
187
188
189 for (index = 0; index < agcount; index++) {
190 pag = xfs_perag_get(mp, index);
191 if (pag) {
192 xfs_perag_put(pag);
193 continue;
194 }
195
196 pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL);
197 if (!pag)
198 goto out_unwind_new_pags;
199 pag->pag_agno = index;
200 pag->pag_mount = mp;
201 spin_lock_init(&pag->pag_ici_lock);
202 INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
203 if (xfs_buf_hash_init(pag))
204 goto out_free_pag;
205 init_waitqueue_head(&pag->pagb_wait);
206 spin_lock_init(&pag->pagb_lock);
207 pag->pagb_count = 0;
208 pag->pagb_tree = RB_ROOT;
209
210 if (radix_tree_preload(GFP_NOFS))
211 goto out_hash_destroy;
212
213 spin_lock(&mp->m_perag_lock);
214 if (radix_tree_insert(&mp->m_perag_tree, index, pag)) {
215 WARN_ON_ONCE(1);
216 spin_unlock(&mp->m_perag_lock);
217 radix_tree_preload_end();
218 error = -EEXIST;
219 goto out_hash_destroy;
220 }
221 spin_unlock(&mp->m_perag_lock);
222 radix_tree_preload_end();
223
224 if (first_initialised == NULLAGNUMBER)
225 first_initialised = index;
226 error = xfs_iunlink_init(pag);
227 if (error)
228 goto out_hash_destroy;
229 spin_lock_init(&pag->pag_state_lock);
230 }
231
232 index = xfs_set_inode_alloc(mp, agcount);
233
234 if (maxagi)
235 *maxagi = index;
236
237 mp->m_ag_prealloc_blocks = xfs_prealloc_blocks(mp);
238 return 0;
239
240out_hash_destroy:
241 xfs_buf_hash_destroy(pag);
242out_free_pag:
243 kmem_free(pag);
244out_unwind_new_pags:
245
246 for (index = first_initialised; index < agcount; index++) {
247 pag = radix_tree_delete(&mp->m_perag_tree, index);
248 if (!pag)
249 break;
250 xfs_buf_hash_destroy(pag);
251 xfs_iunlink_destroy(pag);
252 kmem_free(pag);
253 }
254 return error;
255}
256
257
258
259
260
261
262int
263xfs_readsb(
264 struct xfs_mount *mp,
265 int flags)
266{
267 unsigned int sector_size;
268 struct xfs_buf *bp;
269 struct xfs_sb *sbp = &mp->m_sb;
270 int error;
271 int loud = !(flags & XFS_MFSI_QUIET);
272 const struct xfs_buf_ops *buf_ops;
273
274 ASSERT(mp->m_sb_bp == NULL);
275 ASSERT(mp->m_ddev_targp != NULL);
276
277
278
279
280
281
282
283
284 sector_size = xfs_getsize_buftarg(mp->m_ddev_targp);
285 buf_ops = NULL;
286
287
288
289
290
291
292
293reread:
294 error = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR,
295 BTOBB(sector_size), XBF_NO_IOACCT, &bp,
296 buf_ops);
297 if (error) {
298 if (loud)
299 xfs_warn(mp, "SB validate failed with error %d.", error);
300
301 if (error == -EFSBADCRC)
302 error = -EFSCORRUPTED;
303 return error;
304 }
305
306
307
308
309 xfs_sb_from_disk(sbp, bp->b_addr);
310
311
312
313
314
315 if (sbp->sb_magicnum != XFS_SB_MAGIC) {
316 if (loud)
317 xfs_warn(mp, "Invalid superblock magic number");
318 error = -EINVAL;
319 goto release_buf;
320 }
321
322
323
324
325 if (sector_size > sbp->sb_sectsize) {
326 if (loud)
327 xfs_warn(mp, "device supports %u byte sectors (not %u)",
328 sector_size, sbp->sb_sectsize);
329 error = -ENOSYS;
330 goto release_buf;
331 }
332
333 if (buf_ops == NULL) {
334
335
336
337
338 xfs_buf_relse(bp);
339 sector_size = sbp->sb_sectsize;
340 buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops;
341 goto reread;
342 }
343
344 xfs_reinit_percpu_counters(mp);
345
346
347 bp->b_ops = &xfs_sb_buf_ops;
348
349 mp->m_sb_bp = bp;
350 xfs_buf_unlock(bp);
351 return 0;
352
353release_buf:
354 xfs_buf_relse(bp);
355 return error;
356}
357
358
359
360
361
362
363
364static inline int
365xfs_check_new_dalign(
366 struct xfs_mount *mp,
367 int new_dalign,
368 bool *update_sb)
369{
370 struct xfs_sb *sbp = &mp->m_sb;
371 xfs_ino_t calc_ino;
372
373 calc_ino = xfs_ialloc_calc_rootino(mp, new_dalign);
374 trace_xfs_check_new_dalign(mp, new_dalign, calc_ino);
375
376 if (sbp->sb_rootino == calc_ino) {
377 *update_sb = true;
378 return 0;
379 }
380
381 xfs_warn(mp,
382"Cannot change stripe alignment; would require moving root inode.");
383
384
385
386
387
388
389 xfs_warn(mp, "Skipping superblock stripe alignment update.");
390 *update_sb = false;
391 return 0;
392}
393
394
395
396
397
398
399
400STATIC int
401xfs_validate_new_dalign(
402 struct xfs_mount *mp)
403{
404 if (mp->m_dalign == 0)
405 return 0;
406
407
408
409
410
411 if ((BBTOB(mp->m_dalign) & mp->m_blockmask) ||
412 (BBTOB(mp->m_swidth) & mp->m_blockmask)) {
413 xfs_warn(mp,
414 "alignment check failed: sunit/swidth vs. blocksize(%d)",
415 mp->m_sb.sb_blocksize);
416 return -EINVAL;
417 } else {
418
419
420
421 mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign);
422 if (mp->m_dalign && (mp->m_sb.sb_agblocks % mp->m_dalign)) {
423 xfs_warn(mp,
424 "alignment check failed: sunit/swidth vs. agsize(%d)",
425 mp->m_sb.sb_agblocks);
426 return -EINVAL;
427 } else if (mp->m_dalign) {
428 mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth);
429 } else {
430 xfs_warn(mp,
431 "alignment check failed: sunit(%d) less than bsize(%d)",
432 mp->m_dalign, mp->m_sb.sb_blocksize);
433 return -EINVAL;
434 }
435 }
436
437 if (!xfs_sb_version_hasdalign(&mp->m_sb)) {
438 xfs_warn(mp,
439"cannot change alignment: superblock does not support data alignment");
440 return -EINVAL;
441 }
442
443 return 0;
444}
445
446
447STATIC int
448xfs_update_alignment(
449 struct xfs_mount *mp)
450{
451 struct xfs_sb *sbp = &mp->m_sb;
452
453 if (mp->m_dalign) {
454 bool update_sb;
455 int error;
456
457 if (sbp->sb_unit == mp->m_dalign &&
458 sbp->sb_width == mp->m_swidth)
459 return 0;
460
461 error = xfs_check_new_dalign(mp, mp->m_dalign, &update_sb);
462 if (error || !update_sb)
463 return error;
464
465 sbp->sb_unit = mp->m_dalign;
466 sbp->sb_width = mp->m_swidth;
467 mp->m_update_sb = true;
468 } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN &&
469 xfs_sb_version_hasdalign(&mp->m_sb)) {
470 mp->m_dalign = sbp->sb_unit;
471 mp->m_swidth = sbp->sb_width;
472 }
473
474 return 0;
475}
476
477
478
479
480void
481xfs_set_low_space_thresholds(
482 struct xfs_mount *mp)
483{
484 int i;
485
486 for (i = 0; i < XFS_LOWSP_MAX; i++) {
487 uint64_t space = mp->m_sb.sb_dblocks;
488
489 do_div(space, 100);
490 mp->m_low_space[i] = space * (i + 1);
491 }
492}
493
494
495
496
497STATIC int
498xfs_check_sizes(
499 struct xfs_mount *mp)
500{
501 struct xfs_buf *bp;
502 xfs_daddr_t d;
503 int error;
504
505 d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks);
506 if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) {
507 xfs_warn(mp, "filesystem size mismatch detected");
508 return -EFBIG;
509 }
510 error = xfs_buf_read_uncached(mp->m_ddev_targp,
511 d - XFS_FSS_TO_BB(mp, 1),
512 XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL);
513 if (error) {
514 xfs_warn(mp, "last sector read failed");
515 return error;
516 }
517 xfs_buf_relse(bp);
518
519 if (mp->m_logdev_targp == mp->m_ddev_targp)
520 return 0;
521
522 d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks);
523 if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) {
524 xfs_warn(mp, "log size mismatch detected");
525 return -EFBIG;
526 }
527 error = xfs_buf_read_uncached(mp->m_logdev_targp,
528 d - XFS_FSB_TO_BB(mp, 1),
529 XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL);
530 if (error) {
531 xfs_warn(mp, "log device read failed");
532 return error;
533 }
534 xfs_buf_relse(bp);
535 return 0;
536}
537
538
539
540
541int
542xfs_mount_reset_sbqflags(
543 struct xfs_mount *mp)
544{
545 mp->m_qflags = 0;
546
547
548 if (mp->m_sb.sb_qflags == 0)
549 return 0;
550 spin_lock(&mp->m_sb_lock);
551 mp->m_sb.sb_qflags = 0;
552 spin_unlock(&mp->m_sb_lock);
553
554 if (!xfs_fs_writable(mp, SB_FREEZE_WRITE))
555 return 0;
556
557 return xfs_sync_sb(mp, false);
558}
559
560uint64_t
561xfs_default_resblks(xfs_mount_t *mp)
562{
563 uint64_t resblks;
564
565
566
567
568
569
570
571
572 resblks = mp->m_sb.sb_dblocks;
573 do_div(resblks, 20);
574 resblks = min_t(uint64_t, resblks, 8192);
575 return resblks;
576}
577
578
579STATIC int
580xfs_check_summary_counts(
581 struct xfs_mount *mp)
582{
583
584
585
586
587 if (mp->m_sb.sb_inprogress) {
588 xfs_err(mp, "sb_inprogress set after log recovery??");
589 WARN_ON(1);
590 return -EFSCORRUPTED;
591 }
592
593
594
595
596
597
598
599
600
601
602
603
604 if (XFS_LAST_UNMOUNT_WAS_CLEAN(mp) &&
605 (mp->m_sb.sb_fdblocks > mp->m_sb.sb_dblocks ||
606 !xfs_verify_icount(mp, mp->m_sb.sb_icount) ||
607 mp->m_sb.sb_ifree > mp->m_sb.sb_icount))
608 xfs_fs_mark_sick(mp, XFS_SICK_FS_COUNTERS);
609
610
611
612
613
614
615
616
617
618
619
620
621 if ((!xfs_sb_version_haslazysbcount(&mp->m_sb) ||
622 XFS_LAST_UNMOUNT_WAS_CLEAN(mp)) &&
623 !xfs_fs_has_sickness(mp, XFS_SICK_FS_COUNTERS))
624 return 0;
625
626 return xfs_initialize_perag_data(mp, mp->m_sb.sb_agcount);
627}
628
629
630
631
632
633
634
635
636
637
638
639int
640xfs_mountfs(
641 struct xfs_mount *mp)
642{
643 struct xfs_sb *sbp = &(mp->m_sb);
644 struct xfs_inode *rip;
645 struct xfs_ino_geometry *igeo = M_IGEO(mp);
646 uint64_t resblks;
647 uint quotamount = 0;
648 uint quotaflags = 0;
649 int error = 0;
650
651 xfs_sb_mount_common(mp, sbp);
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669 if (xfs_sb_has_mismatched_features2(sbp)) {
670 xfs_warn(mp, "correcting sb_features alignment problem");
671 sbp->sb_features2 |= sbp->sb_bad_features2;
672 mp->m_update_sb = true;
673
674
675
676
677
678 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
679 !(mp->m_flags & XFS_MOUNT_NOATTR2))
680 mp->m_flags |= XFS_MOUNT_ATTR2;
681 }
682
683 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
684 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
685 xfs_sb_version_removeattr2(&mp->m_sb);
686 mp->m_update_sb = true;
687
688
689 if (!sbp->sb_features2)
690 mp->m_update_sb = true;
691 }
692
693
694 if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) {
695 mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
696 mp->m_update_sb = true;
697 }
698
699
700
701
702
703
704
705 error = xfs_validate_new_dalign(mp);
706 if (error)
707 goto out;
708
709 xfs_alloc_compute_maxlevels(mp);
710 xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK);
711 xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
712 xfs_ialloc_setup_geometry(mp);
713 xfs_rmapbt_compute_maxlevels(mp);
714 xfs_refcountbt_compute_maxlevels(mp);
715
716
717
718
719
720
721
722
723 error = xfs_update_alignment(mp);
724 if (error)
725 goto out;
726
727
728 mp->m_fail_unmount = true;
729
730 error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype,
731 NULL, mp->m_super->s_id);
732 if (error)
733 goto out;
734
735 error = xfs_sysfs_init(&mp->m_stats.xs_kobj, &xfs_stats_ktype,
736 &mp->m_kobj, "stats");
737 if (error)
738 goto out_remove_sysfs;
739
740 error = xfs_error_sysfs_init(mp);
741 if (error)
742 goto out_del_stats;
743
744 error = xfs_errortag_init(mp);
745 if (error)
746 goto out_remove_error_sysfs;
747
748 error = xfs_uuid_mount(mp);
749 if (error)
750 goto out_remove_errortag;
751
752
753
754
755
756 mp->m_allocsize_log =
757 max_t(uint32_t, sbp->sb_blocklog, mp->m_allocsize_log);
758 mp->m_allocsize_blocks = 1U << (mp->m_allocsize_log - sbp->sb_blocklog);
759
760
761 xfs_set_low_space_thresholds(mp);
762
763
764
765
766
767
768 if (xfs_sb_version_hassparseinodes(&mp->m_sb) &&
769 mp->m_sb.sb_spino_align !=
770 XFS_B_TO_FSBT(mp, igeo->inode_cluster_size_raw)) {
771 xfs_warn(mp,
772 "Sparse inode block alignment (%u) must match cluster size (%llu).",
773 mp->m_sb.sb_spino_align,
774 XFS_B_TO_FSBT(mp, igeo->inode_cluster_size_raw));
775 error = -EINVAL;
776 goto out_remove_uuid;
777 }
778
779
780
781
782 error = xfs_check_sizes(mp);
783 if (error)
784 goto out_remove_uuid;
785
786
787
788
789 error = xfs_rtmount_init(mp);
790 if (error) {
791 xfs_warn(mp, "RT mount failed");
792 goto out_remove_uuid;
793 }
794
795
796
797
798
799 mp->m_fixedfsid[0] =
800 (get_unaligned_be16(&sbp->sb_uuid.b[8]) << 16) |
801 get_unaligned_be16(&sbp->sb_uuid.b[4]);
802 mp->m_fixedfsid[1] = get_unaligned_be32(&sbp->sb_uuid.b[0]);
803
804 error = xfs_da_mount(mp);
805 if (error) {
806 xfs_warn(mp, "Failed dir/attr init: %d", error);
807 goto out_remove_uuid;
808 }
809
810
811
812
813 xfs_trans_init(mp);
814
815
816
817
818 error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi);
819 if (error) {
820 xfs_warn(mp, "Failed per-ag init: %d", error);
821 goto out_free_dir;
822 }
823
824 if (XFS_IS_CORRUPT(mp, !sbp->sb_logblocks)) {
825 xfs_warn(mp, "no log defined");
826 error = -EFSCORRUPTED;
827 goto out_free_perag;
828 }
829
830
831
832
833
834
835 error = xfs_log_mount(mp, mp->m_logdev_targp,
836 XFS_FSB_TO_DADDR(mp, sbp->sb_logstart),
837 XFS_FSB_TO_BB(mp, sbp->sb_logblocks));
838 if (error) {
839 xfs_warn(mp, "log mount failed");
840 goto out_fail_wait;
841 }
842
843
844 error = xfs_check_summary_counts(mp);
845 if (error)
846 goto out_log_dealloc;
847
848
849
850
851
852 error = xfs_iget(mp, NULL, sbp->sb_rootino, XFS_IGET_UNTRUSTED,
853 XFS_ILOCK_EXCL, &rip);
854 if (error) {
855 xfs_warn(mp,
856 "Failed to read root inode 0x%llx, error %d",
857 sbp->sb_rootino, -error);
858 goto out_log_dealloc;
859 }
860
861 ASSERT(rip != NULL);
862
863 if (XFS_IS_CORRUPT(mp, !S_ISDIR(VFS_I(rip)->i_mode))) {
864 xfs_warn(mp, "corrupted root inode %llu: not a directory",
865 (unsigned long long)rip->i_ino);
866 xfs_iunlock(rip, XFS_ILOCK_EXCL);
867 error = -EFSCORRUPTED;
868 goto out_rele_rip;
869 }
870 mp->m_rootip = rip;
871
872 xfs_iunlock(rip, XFS_ILOCK_EXCL);
873
874
875
876
877 error = xfs_rtmount_inodes(mp);
878 if (error) {
879
880
881
882 xfs_warn(mp, "failed to read RT inodes");
883 goto out_rele_rip;
884 }
885
886
887
888
889
890
891 if (mp->m_update_sb && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
892 error = xfs_sync_sb(mp, false);
893 if (error) {
894 xfs_warn(mp, "failed to write sb changes");
895 goto out_rtunmount;
896 }
897 }
898
899
900
901
902 if (XFS_IS_QUOTA_RUNNING(mp)) {
903 error = xfs_qm_newmount(mp, "amount, "aflags);
904 if (error)
905 goto out_rtunmount;
906 } else {
907 ASSERT(!XFS_IS_QUOTA_ON(mp));
908
909
910
911
912
913
914 if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
915 xfs_notice(mp, "resetting quota flags");
916 error = xfs_mount_reset_sbqflags(mp);
917 if (error)
918 goto out_rtunmount;
919 }
920 }
921
922
923
924
925
926
927 error = xfs_log_mount_finish(mp);
928 if (error) {
929 xfs_warn(mp, "log mount finish failed");
930 goto out_rtunmount;
931 }
932
933
934
935
936
937
938
939
940
941
942 if ((mp->m_flags & (XFS_MOUNT_RDONLY|XFS_MOUNT_NORECOVERY)) ==
943 XFS_MOUNT_RDONLY) {
944 xfs_quiesce_attr(mp);
945 }
946
947
948
949
950 if (quotamount) {
951 ASSERT(mp->m_qflags == 0);
952 mp->m_qflags = quotaflags;
953
954 xfs_qm_mount_quotas(mp);
955 }
956
957
958
959
960
961
962
963
964
965
966
967
968 if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
969 resblks = xfs_default_resblks(mp);
970 error = xfs_reserve_blocks(mp, &resblks, NULL);
971 if (error)
972 xfs_warn(mp,
973 "Unable to allocate reserve blocks. Continuing without reserve pool.");
974
975
976 error = xfs_reflink_recover_cow(mp);
977 if (error) {
978 xfs_err(mp,
979 "Error %d recovering leftover CoW allocations.", error);
980 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
981 goto out_quota;
982 }
983
984
985 error = xfs_fs_reserve_ag_blocks(mp);
986 if (error && error != -ENOSPC)
987 goto out_agresv;
988 }
989
990 return 0;
991
992 out_agresv:
993 xfs_fs_unreserve_ag_blocks(mp);
994 out_quota:
995 xfs_qm_unmount_quotas(mp);
996 out_rtunmount:
997 xfs_rtunmount_inodes(mp);
998 out_rele_rip:
999 xfs_irele(rip);
1000
1001 xfs_qm_unmount(mp);
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013 cancel_delayed_work_sync(&mp->m_reclaim_work);
1014 xfs_reclaim_inodes(mp);
1015 xfs_health_unmount(mp);
1016 out_log_dealloc:
1017 mp->m_flags |= XFS_MOUNT_UNMOUNTING;
1018 xfs_log_mount_cancel(mp);
1019 out_fail_wait:
1020 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp)
1021 xfs_wait_buftarg(mp->m_logdev_targp);
1022 xfs_wait_buftarg(mp->m_ddev_targp);
1023 out_free_perag:
1024 xfs_free_perag(mp);
1025 out_free_dir:
1026 xfs_da_unmount(mp);
1027 out_remove_uuid:
1028 xfs_uuid_unmount(mp);
1029 out_remove_errortag:
1030 xfs_errortag_del(mp);
1031 out_remove_error_sysfs:
1032 xfs_error_sysfs_del(mp);
1033 out_del_stats:
1034 xfs_sysfs_del(&mp->m_stats.xs_kobj);
1035 out_remove_sysfs:
1036 xfs_sysfs_del(&mp->m_kobj);
1037 out:
1038 return error;
1039}
1040
1041
1042
1043
1044
1045void
1046xfs_unmountfs(
1047 struct xfs_mount *mp)
1048{
1049 uint64_t resblks;
1050 int error;
1051
1052 xfs_stop_block_reaping(mp);
1053 xfs_fs_unreserve_ag_blocks(mp);
1054 xfs_qm_unmount_quotas(mp);
1055 xfs_rtunmount_inodes(mp);
1056 xfs_irele(mp->m_rootip);
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068 xfs_log_force(mp, XFS_LOG_SYNC);
1069
1070
1071
1072
1073
1074 xfs_extent_busy_wait_all(mp);
1075 flush_workqueue(xfs_discard_wq);
1076
1077
1078
1079
1080
1081
1082
1083 mp->m_flags |= XFS_MOUNT_UNMOUNTING;
1084
1085
1086
1087
1088 xfs_ail_push_all_sync(mp->m_ail);
1089
1090
1091
1092
1093
1094
1095 cancel_delayed_work_sync(&mp->m_reclaim_work);
1096 xfs_reclaim_inodes(mp);
1097 xfs_health_unmount(mp);
1098
1099 xfs_qm_unmount(mp);
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115 resblks = 0;
1116 error = xfs_reserve_blocks(mp, &resblks, NULL);
1117 if (error)
1118 xfs_warn(mp, "Unable to free reserved block pool. "
1119 "Freespace may not be correct on next mount.");
1120
1121 error = xfs_log_sbcount(mp);
1122 if (error)
1123 xfs_warn(mp, "Unable to update superblock counters. "
1124 "Freespace may not be correct on next mount.");
1125
1126
1127 xfs_log_unmount(mp);
1128 xfs_da_unmount(mp);
1129 xfs_uuid_unmount(mp);
1130
1131#if defined(DEBUG)
1132 xfs_errortag_clearall(mp);
1133#endif
1134 xfs_free_perag(mp);
1135
1136 xfs_errortag_del(mp);
1137 xfs_error_sysfs_del(mp);
1138 xfs_sysfs_del(&mp->m_stats.xs_kobj);
1139 xfs_sysfs_del(&mp->m_kobj);
1140}
1141
1142
1143
1144
1145
1146
1147
1148bool
1149xfs_fs_writable(
1150 struct xfs_mount *mp,
1151 int level)
1152{
1153 ASSERT(level > SB_UNFROZEN);
1154 if ((mp->m_super->s_writers.frozen >= level) ||
1155 XFS_FORCED_SHUTDOWN(mp) || (mp->m_flags & XFS_MOUNT_RDONLY))
1156 return false;
1157
1158 return true;
1159}
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170int
1171xfs_log_sbcount(xfs_mount_t *mp)
1172{
1173
1174 if (!xfs_fs_writable(mp, SB_FREEZE_COMPLETE))
1175 return 0;
1176
1177
1178
1179
1180
1181 if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
1182 return 0;
1183
1184 return xfs_sync_sb(mp, true);
1185}
1186
1187
1188
1189
1190
1191
1192
1193
1194#define XFS_FDBLOCKS_BATCH 1024
1195int
1196xfs_mod_fdblocks(
1197 struct xfs_mount *mp,
1198 int64_t delta,
1199 bool rsvd)
1200{
1201 int64_t lcounter;
1202 long long res_used;
1203 s32 batch;
1204
1205 if (delta > 0) {
1206
1207
1208
1209
1210 if (likely(mp->m_resblks == mp->m_resblks_avail)) {
1211 percpu_counter_add(&mp->m_fdblocks, delta);
1212 return 0;
1213 }
1214
1215 spin_lock(&mp->m_sb_lock);
1216 res_used = (long long)(mp->m_resblks - mp->m_resblks_avail);
1217
1218 if (res_used > delta) {
1219 mp->m_resblks_avail += delta;
1220 } else {
1221 delta -= res_used;
1222 mp->m_resblks_avail = mp->m_resblks;
1223 percpu_counter_add(&mp->m_fdblocks, delta);
1224 }
1225 spin_unlock(&mp->m_sb_lock);
1226 return 0;
1227 }
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237 if (__percpu_counter_compare(&mp->m_fdblocks, 2 * XFS_FDBLOCKS_BATCH,
1238 XFS_FDBLOCKS_BATCH) < 0)
1239 batch = 1;
1240 else
1241 batch = XFS_FDBLOCKS_BATCH;
1242
1243 percpu_counter_add_batch(&mp->m_fdblocks, delta, batch);
1244 if (__percpu_counter_compare(&mp->m_fdblocks, mp->m_alloc_set_aside,
1245 XFS_FDBLOCKS_BATCH) >= 0) {
1246
1247 return 0;
1248 }
1249
1250
1251
1252
1253
1254 spin_lock(&mp->m_sb_lock);
1255 percpu_counter_add(&mp->m_fdblocks, -delta);
1256 if (!rsvd)
1257 goto fdblocks_enospc;
1258
1259 lcounter = (long long)mp->m_resblks_avail + delta;
1260 if (lcounter >= 0) {
1261 mp->m_resblks_avail = lcounter;
1262 spin_unlock(&mp->m_sb_lock);
1263 return 0;
1264 }
1265 xfs_warn_once(mp,
1266"Reserve blocks depleted! Consider increasing reserve pool size.");
1267
1268fdblocks_enospc:
1269 spin_unlock(&mp->m_sb_lock);
1270 return -ENOSPC;
1271}
1272
1273int
1274xfs_mod_frextents(
1275 struct xfs_mount *mp,
1276 int64_t delta)
1277{
1278 int64_t lcounter;
1279 int ret = 0;
1280
1281 spin_lock(&mp->m_sb_lock);
1282 lcounter = mp->m_sb.sb_frextents + delta;
1283 if (lcounter < 0)
1284 ret = -ENOSPC;
1285 else
1286 mp->m_sb.sb_frextents = lcounter;
1287 spin_unlock(&mp->m_sb_lock);
1288 return ret;
1289}
1290
1291
1292
1293
1294
1295
1296struct xfs_buf *
1297xfs_getsb(
1298 struct xfs_mount *mp)
1299{
1300 struct xfs_buf *bp = mp->m_sb_bp;
1301
1302 xfs_buf_lock(bp);
1303 xfs_buf_hold(bp);
1304 ASSERT(bp->b_flags & XBF_DONE);
1305 return bp;
1306}
1307
1308
1309
1310
1311void
1312xfs_freesb(
1313 struct xfs_mount *mp)
1314{
1315 struct xfs_buf *bp = mp->m_sb_bp;
1316
1317 xfs_buf_lock(bp);
1318 mp->m_sb_bp = NULL;
1319 xfs_buf_relse(bp);
1320}
1321
1322
1323
1324
1325
1326int
1327xfs_dev_is_read_only(
1328 struct xfs_mount *mp,
1329 char *message)
1330{
1331 if (xfs_readonly_buftarg(mp->m_ddev_targp) ||
1332 xfs_readonly_buftarg(mp->m_logdev_targp) ||
1333 (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) {
1334 xfs_notice(mp, "%s required on read-only device.", message);
1335 xfs_notice(mp, "write access unavailable, cannot proceed.");
1336 return -EROFS;
1337 }
1338 return 0;
1339}
1340
1341
1342void
1343xfs_force_summary_recalc(
1344 struct xfs_mount *mp)
1345{
1346 if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
1347 return;
1348
1349 xfs_fs_mark_sick(mp, XFS_SICK_FS_COUNTERS);
1350}
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363#define XFS_DELALLOC_BATCH (4096)
1364void
1365xfs_mod_delalloc(
1366 struct xfs_mount *mp,
1367 int64_t delta)
1368{
1369 percpu_counter_add_batch(&mp->m_delalloc_blks, delta,
1370 XFS_DELALLOC_BATCH);
1371}
1372