1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_bit.h"
25#include "xfs_sb.h"
26#include "xfs_mount.h"
27#include "xfs_da_format.h"
28#include "xfs_da_btree.h"
29#include "xfs_inode.h"
30#include "xfs_dir2.h"
31#include "xfs_ialloc.h"
32#include "xfs_alloc.h"
33#include "xfs_rtalloc.h"
34#include "xfs_bmap.h"
35#include "xfs_trans.h"
36#include "xfs_trans_priv.h"
37#include "xfs_log.h"
38#include "xfs_error.h"
39#include "xfs_quota.h"
40#include "xfs_fsops.h"
41#include "xfs_trace.h"
42#include "xfs_icache.h"
43#include "xfs_sysfs.h"
44
45
46static DEFINE_MUTEX(xfs_uuid_table_mutex);
47static int xfs_uuid_table_size;
48static uuid_t *xfs_uuid_table;
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 if (mp->m_flags & XFS_MOUNT_NOUUID)
62 return 0;
63
64 if (uuid_is_nil(uuid)) {
65 xfs_warn(mp, "Filesystem has nil UUID - can't mount");
66 return -EINVAL;
67 }
68
69 mutex_lock(&xfs_uuid_table_mutex);
70 for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) {
71 if (uuid_is_nil(&xfs_uuid_table[i])) {
72 hole = i;
73 continue;
74 }
75 if (uuid_equal(uuid, &xfs_uuid_table[i]))
76 goto out_duplicate;
77 }
78
79 if (hole < 0) {
80 xfs_uuid_table = kmem_realloc(xfs_uuid_table,
81 (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table),
82 xfs_uuid_table_size * sizeof(*xfs_uuid_table),
83 KM_SLEEP);
84 hole = xfs_uuid_table_size++;
85 }
86 xfs_uuid_table[hole] = *uuid;
87 mutex_unlock(&xfs_uuid_table_mutex);
88
89 return 0;
90
91 out_duplicate:
92 mutex_unlock(&xfs_uuid_table_mutex);
93 xfs_warn(mp, "Filesystem has duplicate UUID %pU - can't mount", uuid);
94 return -EINVAL;
95}
96
97STATIC void
98xfs_uuid_unmount(
99 struct xfs_mount *mp)
100{
101 uuid_t *uuid = &mp->m_sb.sb_uuid;
102 int i;
103
104 if (mp->m_flags & XFS_MOUNT_NOUUID)
105 return;
106
107 mutex_lock(&xfs_uuid_table_mutex);
108 for (i = 0; i < xfs_uuid_table_size; i++) {
109 if (uuid_is_nil(&xfs_uuid_table[i]))
110 continue;
111 if (!uuid_equal(uuid, &xfs_uuid_table[i]))
112 continue;
113 memset(&xfs_uuid_table[i], 0, sizeof(uuid_t));
114 break;
115 }
116 ASSERT(i < xfs_uuid_table_size);
117 mutex_unlock(&xfs_uuid_table_mutex);
118}
119
120
121STATIC void
122__xfs_free_perag(
123 struct rcu_head *head)
124{
125 struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head);
126
127 ASSERT(atomic_read(&pag->pag_ref) == 0);
128 kmem_free(pag);
129}
130
131
132
133
134STATIC void
135xfs_free_perag(
136 xfs_mount_t *mp)
137{
138 xfs_agnumber_t agno;
139 struct xfs_perag *pag;
140
141 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
142 spin_lock(&mp->m_perag_lock);
143 pag = radix_tree_delete(&mp->m_perag_tree, agno);
144 spin_unlock(&mp->m_perag_lock);
145 ASSERT(pag);
146 ASSERT(atomic_read(&pag->pag_ref) == 0);
147 call_rcu(&pag->rcu_head, __xfs_free_perag);
148 }
149}
150
151
152
153
154
155int
156xfs_sb_validate_fsb_count(
157 xfs_sb_t *sbp,
158 __uint64_t nblocks)
159{
160 ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
161 ASSERT(sbp->sb_blocklog >= BBSHIFT);
162
163
164 if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX)
165 return -EFBIG;
166 return 0;
167}
168
169int
170xfs_initialize_perag(
171 xfs_mount_t *mp,
172 xfs_agnumber_t agcount,
173 xfs_agnumber_t *maxagi)
174{
175 xfs_agnumber_t index;
176 xfs_agnumber_t first_initialised = 0;
177 xfs_perag_t *pag;
178 xfs_agino_t agino;
179 xfs_ino_t ino;
180 xfs_sb_t *sbp = &mp->m_sb;
181 int error = -ENOMEM;
182
183
184
185
186
187
188 for (index = 0; index < agcount; index++) {
189 pag = xfs_perag_get(mp, index);
190 if (pag) {
191 xfs_perag_put(pag);
192 continue;
193 }
194 if (!first_initialised)
195 first_initialised = index;
196
197 pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL);
198 if (!pag)
199 goto out_unwind;
200 pag->pag_agno = index;
201 pag->pag_mount = mp;
202 spin_lock_init(&pag->pag_ici_lock);
203 mutex_init(&pag->pag_ici_reclaim_lock);
204 INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
205 spin_lock_init(&pag->pag_buf_lock);
206 pag->pag_buf_tree = RB_ROOT;
207
208 if (radix_tree_preload(GFP_NOFS))
209 goto out_unwind;
210
211 spin_lock(&mp->m_perag_lock);
212 if (radix_tree_insert(&mp->m_perag_tree, index, pag)) {
213 BUG();
214 spin_unlock(&mp->m_perag_lock);
215 radix_tree_preload_end();
216 error = -EEXIST;
217 goto out_unwind;
218 }
219 spin_unlock(&mp->m_perag_lock);
220 radix_tree_preload_end();
221 }
222
223
224
225
226
227 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
228 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
229
230 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
231 mp->m_flags |= XFS_MOUNT_32BITINODES;
232 else
233 mp->m_flags &= ~XFS_MOUNT_32BITINODES;
234
235 if (mp->m_flags & XFS_MOUNT_32BITINODES)
236 index = xfs_set_inode32(mp, agcount);
237 else
238 index = xfs_set_inode64(mp, agcount);
239
240 if (maxagi)
241 *maxagi = index;
242 return 0;
243
244out_unwind:
245 kmem_free(pag);
246 for (; index > first_initialised; index--) {
247 pag = radix_tree_delete(&mp->m_perag_tree, index);
248 kmem_free(pag);
249 }
250 return error;
251}
252
253
254
255
256
257
258int
259xfs_readsb(
260 struct xfs_mount *mp,
261 int flags)
262{
263 unsigned int sector_size;
264 struct xfs_buf *bp;
265 struct xfs_sb *sbp = &mp->m_sb;
266 int error;
267 int loud = !(flags & XFS_MFSI_QUIET);
268 const struct xfs_buf_ops *buf_ops;
269
270 ASSERT(mp->m_sb_bp == NULL);
271 ASSERT(mp->m_ddev_targp != NULL);
272
273
274
275
276
277
278
279
280 sector_size = xfs_getsize_buftarg(mp->m_ddev_targp);
281 buf_ops = NULL;
282
283
284
285
286
287
288reread:
289 error = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR,
290 BTOBB(sector_size), 0, &bp, buf_ops);
291 if (error) {
292 if (loud)
293 xfs_warn(mp, "SB validate failed with error %d.", error);
294
295 if (error == -EFSBADCRC)
296 error = -EFSCORRUPTED;
297 return error;
298 }
299
300
301
302
303 xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp));
304
305
306
307
308
309 if (sbp->sb_magicnum != XFS_SB_MAGIC) {
310 if (loud)
311 xfs_warn(mp, "Invalid superblock magic number");
312 error = -EINVAL;
313 goto release_buf;
314 }
315
316
317
318
319 if (sector_size > sbp->sb_sectsize) {
320 if (loud)
321 xfs_warn(mp, "device supports %u byte sectors (not %u)",
322 sector_size, sbp->sb_sectsize);
323 error = -ENOSYS;
324 goto release_buf;
325 }
326
327 if (buf_ops == NULL) {
328
329
330
331
332 xfs_buf_relse(bp);
333 sector_size = sbp->sb_sectsize;
334 buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops;
335 goto reread;
336 }
337
338 xfs_reinit_percpu_counters(mp);
339
340
341 bp->b_ops = &xfs_sb_buf_ops;
342
343 mp->m_sb_bp = bp;
344 xfs_buf_unlock(bp);
345 return 0;
346
347release_buf:
348 xfs_buf_relse(bp);
349 return error;
350}
351
352
353
354
355STATIC int
356xfs_update_alignment(xfs_mount_t *mp)
357{
358 xfs_sb_t *sbp = &(mp->m_sb);
359
360 if (mp->m_dalign) {
361
362
363
364
365 if ((BBTOB(mp->m_dalign) & mp->m_blockmask) ||
366 (BBTOB(mp->m_swidth) & mp->m_blockmask)) {
367 xfs_warn(mp,
368 "alignment check failed: sunit/swidth vs. blocksize(%d)",
369 sbp->sb_blocksize);
370 return -EINVAL;
371 } else {
372
373
374
375 mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign);
376 if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) {
377 xfs_warn(mp,
378 "alignment check failed: sunit/swidth vs. agsize(%d)",
379 sbp->sb_agblocks);
380 return -EINVAL;
381 } else if (mp->m_dalign) {
382 mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth);
383 } else {
384 xfs_warn(mp,
385 "alignment check failed: sunit(%d) less than bsize(%d)",
386 mp->m_dalign, sbp->sb_blocksize);
387 return -EINVAL;
388 }
389 }
390
391
392
393
394
395 if (xfs_sb_version_hasdalign(sbp)) {
396 if (sbp->sb_unit != mp->m_dalign) {
397 sbp->sb_unit = mp->m_dalign;
398 mp->m_update_sb = true;
399 }
400 if (sbp->sb_width != mp->m_swidth) {
401 sbp->sb_width = mp->m_swidth;
402 mp->m_update_sb = true;
403 }
404 } else {
405 xfs_warn(mp,
406 "cannot change alignment: superblock does not support data alignment");
407 return -EINVAL;
408 }
409 } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN &&
410 xfs_sb_version_hasdalign(&mp->m_sb)) {
411 mp->m_dalign = sbp->sb_unit;
412 mp->m_swidth = sbp->sb_width;
413 }
414
415 return 0;
416}
417
418
419
420
421STATIC void
422xfs_set_maxicount(xfs_mount_t *mp)
423{
424 xfs_sb_t *sbp = &(mp->m_sb);
425 __uint64_t icount;
426
427 if (sbp->sb_imax_pct) {
428
429
430
431
432 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
433 do_div(icount, 100);
434 do_div(icount, mp->m_ialloc_blks);
435 mp->m_maxicount = (icount * mp->m_ialloc_blks) <<
436 sbp->sb_inopblog;
437 } else {
438 mp->m_maxicount = 0;
439 }
440}
441
442
443
444
445
446
447
448STATIC void
449xfs_set_rw_sizes(xfs_mount_t *mp)
450{
451 xfs_sb_t *sbp = &(mp->m_sb);
452 int readio_log, writeio_log;
453
454 if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) {
455 if (mp->m_flags & XFS_MOUNT_WSYNC) {
456 readio_log = XFS_WSYNC_READIO_LOG;
457 writeio_log = XFS_WSYNC_WRITEIO_LOG;
458 } else {
459 readio_log = XFS_READIO_LOG_LARGE;
460 writeio_log = XFS_WRITEIO_LOG_LARGE;
461 }
462 } else {
463 readio_log = mp->m_readio_log;
464 writeio_log = mp->m_writeio_log;
465 }
466
467 if (sbp->sb_blocklog > readio_log) {
468 mp->m_readio_log = sbp->sb_blocklog;
469 } else {
470 mp->m_readio_log = readio_log;
471 }
472 mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog);
473 if (sbp->sb_blocklog > writeio_log) {
474 mp->m_writeio_log = sbp->sb_blocklog;
475 } else {
476 mp->m_writeio_log = writeio_log;
477 }
478 mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog);
479}
480
481
482
483
484void
485xfs_set_low_space_thresholds(
486 struct xfs_mount *mp)
487{
488 int i;
489
490 for (i = 0; i < XFS_LOWSP_MAX; i++) {
491 __uint64_t space = mp->m_sb.sb_dblocks;
492
493 do_div(space, 100);
494 mp->m_low_space[i] = space * (i + 1);
495 }
496}
497
498
499
500
501
502STATIC void
503xfs_set_inoalignment(xfs_mount_t *mp)
504{
505 if (xfs_sb_version_hasalign(&mp->m_sb) &&
506 mp->m_sb.sb_inoalignmt >=
507 XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size))
508 mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1;
509 else
510 mp->m_inoalign_mask = 0;
511
512
513
514
515 if (mp->m_dalign && mp->m_inoalign_mask &&
516 !(mp->m_dalign & mp->m_inoalign_mask))
517 mp->m_sinoalign = mp->m_dalign;
518 else
519 mp->m_sinoalign = 0;
520}
521
522
523
524
525STATIC int
526xfs_check_sizes(
527 struct xfs_mount *mp)
528{
529 struct xfs_buf *bp;
530 xfs_daddr_t d;
531 int error;
532
533 d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks);
534 if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) {
535 xfs_warn(mp, "filesystem size mismatch detected");
536 return -EFBIG;
537 }
538 error = xfs_buf_read_uncached(mp->m_ddev_targp,
539 d - XFS_FSS_TO_BB(mp, 1),
540 XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL);
541 if (error) {
542 xfs_warn(mp, "last sector read failed");
543 return error;
544 }
545 xfs_buf_relse(bp);
546
547 if (mp->m_logdev_targp == mp->m_ddev_targp)
548 return 0;
549
550 d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks);
551 if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) {
552 xfs_warn(mp, "log size mismatch detected");
553 return -EFBIG;
554 }
555 error = xfs_buf_read_uncached(mp->m_logdev_targp,
556 d - XFS_FSB_TO_BB(mp, 1),
557 XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL);
558 if (error) {
559 xfs_warn(mp, "log device read failed");
560 return error;
561 }
562 xfs_buf_relse(bp);
563 return 0;
564}
565
566
567
568
569int
570xfs_mount_reset_sbqflags(
571 struct xfs_mount *mp)
572{
573 mp->m_qflags = 0;
574
575
576 if (mp->m_sb.sb_qflags == 0)
577 return 0;
578 spin_lock(&mp->m_sb_lock);
579 mp->m_sb.sb_qflags = 0;
580 spin_unlock(&mp->m_sb_lock);
581
582 if (!xfs_fs_writable(mp, SB_FREEZE_WRITE))
583 return 0;
584
585 return xfs_sync_sb(mp, false);
586}
587
588__uint64_t
589xfs_default_resblks(xfs_mount_t *mp)
590{
591 __uint64_t resblks;
592
593
594
595
596
597
598
599
600 resblks = mp->m_sb.sb_dblocks;
601 do_div(resblks, 20);
602 resblks = min_t(__uint64_t, resblks, 8192);
603 return resblks;
604}
605
606
607
608
609
610
611
612
613
614
615
616int
617xfs_mountfs(
618 xfs_mount_t *mp)
619{
620 xfs_sb_t *sbp = &(mp->m_sb);
621 xfs_inode_t *rip;
622 __uint64_t resblks;
623 uint quotamount = 0;
624 uint quotaflags = 0;
625 int error = 0;
626
627 xfs_sb_mount_common(mp, sbp);
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645 if (xfs_sb_has_mismatched_features2(sbp)) {
646 xfs_warn(mp, "correcting sb_features alignment problem");
647 sbp->sb_features2 |= sbp->sb_bad_features2;
648 mp->m_update_sb = true;
649
650
651
652
653
654 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
655 !(mp->m_flags & XFS_MOUNT_NOATTR2))
656 mp->m_flags |= XFS_MOUNT_ATTR2;
657 }
658
659 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
660 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
661 xfs_sb_version_removeattr2(&mp->m_sb);
662 mp->m_update_sb = true;
663
664
665 if (!sbp->sb_features2)
666 mp->m_update_sb = true;
667 }
668
669
670 if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) {
671 mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
672 mp->m_update_sb = true;
673 }
674
675
676
677
678
679
680
681 error = xfs_update_alignment(mp);
682 if (error)
683 goto out;
684
685 xfs_alloc_compute_maxlevels(mp);
686 xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK);
687 xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
688 xfs_ialloc_compute_maxlevels(mp);
689
690 xfs_set_maxicount(mp);
691
692 error = xfs_sysfs_init(&mp->m_kobj, &xfs_mp_ktype, NULL, mp->m_fsname);
693 if (error)
694 goto out;
695
696 error = xfs_uuid_mount(mp);
697 if (error)
698 goto out_remove_sysfs;
699
700
701
702
703 xfs_set_rw_sizes(mp);
704
705
706 xfs_set_low_space_thresholds(mp);
707
708
709
710
711
712
713
714
715
716
717
718 mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
719 if (xfs_sb_version_hascrc(&mp->m_sb)) {
720 int new_size = mp->m_inode_cluster_size;
721
722 new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE;
723 if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size))
724 mp->m_inode_cluster_size = new_size;
725 }
726
727
728
729
730 xfs_set_inoalignment(mp);
731
732
733
734
735 error = xfs_check_sizes(mp);
736 if (error)
737 goto out_remove_uuid;
738
739
740
741
742 error = xfs_rtmount_init(mp);
743 if (error) {
744 xfs_warn(mp, "RT mount failed");
745 goto out_remove_uuid;
746 }
747
748
749
750
751
752 uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid);
753
754 mp->m_dmevmask = 0;
755
756 error = xfs_da_mount(mp);
757 if (error) {
758 xfs_warn(mp, "Failed dir/attr init: %d", error);
759 goto out_remove_uuid;
760 }
761
762
763
764
765 xfs_trans_init(mp);
766
767
768
769
770 spin_lock_init(&mp->m_perag_lock);
771 INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
772 error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi);
773 if (error) {
774 xfs_warn(mp, "Failed per-ag init: %d", error);
775 goto out_free_dir;
776 }
777
778 if (!sbp->sb_logblocks) {
779 xfs_warn(mp, "no log defined");
780 XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp);
781 error = -EFSCORRUPTED;
782 goto out_free_perag;
783 }
784
785
786
787
788 error = xfs_log_mount(mp, mp->m_logdev_targp,
789 XFS_FSB_TO_DADDR(mp, sbp->sb_logstart),
790 XFS_FSB_TO_BB(mp, sbp->sb_logblocks));
791 if (error) {
792 xfs_warn(mp, "log mount failed");
793 goto out_fail_wait;
794 }
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815 if (xfs_sb_version_haslazysbcount(&mp->m_sb) &&
816 !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) &&
817 !mp->m_sb.sb_inprogress) {
818 error = xfs_initialize_perag_data(mp, sbp->sb_agcount);
819 if (error)
820 goto out_log_dealloc;
821 }
822
823
824
825
826
827 error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip);
828 if (error) {
829 xfs_warn(mp, "failed to read root inode");
830 goto out_log_dealloc;
831 }
832
833 ASSERT(rip != NULL);
834
835 if (unlikely(!S_ISDIR(rip->i_d.di_mode))) {
836 xfs_warn(mp, "corrupted root inode %llu: not a directory",
837 (unsigned long long)rip->i_ino);
838 xfs_iunlock(rip, XFS_ILOCK_EXCL);
839 XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW,
840 mp);
841 error = -EFSCORRUPTED;
842 goto out_rele_rip;
843 }
844 mp->m_rootip = rip;
845
846 xfs_iunlock(rip, XFS_ILOCK_EXCL);
847
848
849
850
851 error = xfs_rtmount_inodes(mp);
852 if (error) {
853
854
855
856 xfs_warn(mp, "failed to read RT inodes");
857 goto out_rele_rip;
858 }
859
860
861
862
863
864
865 if (mp->m_update_sb && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
866 error = xfs_sync_sb(mp, false);
867 if (error) {
868 xfs_warn(mp, "failed to write sb changes");
869 goto out_rtunmount;
870 }
871 }
872
873
874
875
876 if (XFS_IS_QUOTA_RUNNING(mp)) {
877 error = xfs_qm_newmount(mp, "amount, "aflags);
878 if (error)
879 goto out_rtunmount;
880 } else {
881 ASSERT(!XFS_IS_QUOTA_ON(mp));
882
883
884
885
886
887
888 if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
889 xfs_notice(mp, "resetting quota flags");
890 error = xfs_mount_reset_sbqflags(mp);
891 if (error)
892 goto out_rtunmount;
893 }
894 }
895
896
897
898
899
900
901 error = xfs_log_mount_finish(mp);
902 if (error) {
903 xfs_warn(mp, "log mount finish failed");
904 goto out_rtunmount;
905 }
906
907
908
909
910 if (quotamount) {
911 ASSERT(mp->m_qflags == 0);
912 mp->m_qflags = quotaflags;
913
914 xfs_qm_mount_quotas(mp);
915 }
916
917
918
919
920
921
922
923
924
925
926
927
928 if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
929 resblks = xfs_default_resblks(mp);
930 error = xfs_reserve_blocks(mp, &resblks, NULL);
931 if (error)
932 xfs_warn(mp,
933 "Unable to allocate reserve blocks. Continuing without reserve pool.");
934 }
935
936 return 0;
937
938 out_rtunmount:
939 xfs_rtunmount_inodes(mp);
940 out_rele_rip:
941 IRELE(rip);
942 out_log_dealloc:
943 xfs_log_unmount(mp);
944 out_fail_wait:
945 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp)
946 xfs_wait_buftarg(mp->m_logdev_targp);
947 xfs_wait_buftarg(mp->m_ddev_targp);
948 out_free_perag:
949 xfs_free_perag(mp);
950 out_free_dir:
951 xfs_da_unmount(mp);
952 out_remove_uuid:
953 xfs_uuid_unmount(mp);
954 out_remove_sysfs:
955 xfs_sysfs_del(&mp->m_kobj);
956 out:
957 return error;
958}
959
960
961
962
963
964void
965xfs_unmountfs(
966 struct xfs_mount *mp)
967{
968 __uint64_t resblks;
969 int error;
970
971 cancel_delayed_work_sync(&mp->m_eofblocks_work);
972
973 xfs_qm_unmount_quotas(mp);
974 xfs_rtunmount_inodes(mp);
975 IRELE(mp->m_rootip);
976
977
978
979
980
981
982
983
984
985
986
987 xfs_log_force(mp, XFS_LOG_SYNC);
988
989
990
991
992 xfs_ail_push_all_sync(mp->m_ail);
993
994
995
996
997
998
999
1000 cancel_delayed_work_sync(&mp->m_reclaim_work);
1001 xfs_reclaim_inodes(mp, SYNC_WAIT);
1002
1003 xfs_qm_unmount(mp);
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019 resblks = 0;
1020 error = xfs_reserve_blocks(mp, &resblks, NULL);
1021 if (error)
1022 xfs_warn(mp, "Unable to free reserved block pool. "
1023 "Freespace may not be correct on next mount.");
1024
1025 error = xfs_log_sbcount(mp);
1026 if (error)
1027 xfs_warn(mp, "Unable to update superblock counters. "
1028 "Freespace may not be correct on next mount.");
1029
1030 xfs_log_unmount(mp);
1031 xfs_da_unmount(mp);
1032 xfs_uuid_unmount(mp);
1033
1034#if defined(DEBUG)
1035 xfs_errortag_clearall(mp, 0);
1036#endif
1037 xfs_free_perag(mp);
1038
1039 xfs_sysfs_del(&mp->m_kobj);
1040}
1041
1042
1043
1044
1045
1046
1047
1048bool
1049xfs_fs_writable(
1050 struct xfs_mount *mp,
1051 int level)
1052{
1053 ASSERT(level > SB_UNFROZEN);
1054 if ((mp->m_super->s_writers.frozen >= level) ||
1055 XFS_FORCED_SHUTDOWN(mp) || (mp->m_flags & XFS_MOUNT_RDONLY))
1056 return false;
1057
1058 return true;
1059}
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070int
1071xfs_log_sbcount(xfs_mount_t *mp)
1072{
1073
1074 if (!xfs_fs_writable(mp, SB_FREEZE_COMPLETE))
1075 return 0;
1076
1077
1078
1079
1080
1081 if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
1082 return 0;
1083
1084 return xfs_sync_sb(mp, true);
1085}
1086
1087
1088
1089
1090
1091#define XFS_ICOUNT_BATCH 128
1092int
1093xfs_mod_icount(
1094 struct xfs_mount *mp,
1095 int64_t delta)
1096{
1097 __percpu_counter_add(&mp->m_icount, delta, XFS_ICOUNT_BATCH);
1098 if (__percpu_counter_compare(&mp->m_icount, 0, XFS_ICOUNT_BATCH) < 0) {
1099 ASSERT(0);
1100 percpu_counter_add(&mp->m_icount, -delta);
1101 return -EINVAL;
1102 }
1103 return 0;
1104}
1105
1106int
1107xfs_mod_ifree(
1108 struct xfs_mount *mp,
1109 int64_t delta)
1110{
1111 percpu_counter_add(&mp->m_ifree, delta);
1112 if (percpu_counter_compare(&mp->m_ifree, 0) < 0) {
1113 ASSERT(0);
1114 percpu_counter_add(&mp->m_ifree, -delta);
1115 return -EINVAL;
1116 }
1117 return 0;
1118}
1119
1120
1121
1122
1123
1124
1125
1126
1127#define XFS_FDBLOCKS_BATCH 1024
1128int
1129xfs_mod_fdblocks(
1130 struct xfs_mount *mp,
1131 int64_t delta,
1132 bool rsvd)
1133{
1134 int64_t lcounter;
1135 long long res_used;
1136 s32 batch;
1137
1138 if (delta > 0) {
1139
1140
1141
1142
1143 if (likely(mp->m_resblks == mp->m_resblks_avail)) {
1144 percpu_counter_add(&mp->m_fdblocks, delta);
1145 return 0;
1146 }
1147
1148 spin_lock(&mp->m_sb_lock);
1149 res_used = (long long)(mp->m_resblks - mp->m_resblks_avail);
1150
1151 if (res_used > delta) {
1152 mp->m_resblks_avail += delta;
1153 } else {
1154 delta -= res_used;
1155 mp->m_resblks_avail = mp->m_resblks;
1156 percpu_counter_add(&mp->m_fdblocks, delta);
1157 }
1158 spin_unlock(&mp->m_sb_lock);
1159 return 0;
1160 }
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170 if (__percpu_counter_compare(&mp->m_fdblocks, 2 * XFS_FDBLOCKS_BATCH,
1171 XFS_FDBLOCKS_BATCH) < 0)
1172 batch = 1;
1173 else
1174 batch = XFS_FDBLOCKS_BATCH;
1175
1176 __percpu_counter_add(&mp->m_fdblocks, delta, batch);
1177 if (__percpu_counter_compare(&mp->m_fdblocks, XFS_ALLOC_SET_ASIDE(mp),
1178 XFS_FDBLOCKS_BATCH) >= 0) {
1179
1180 return 0;
1181 }
1182
1183
1184
1185
1186
1187 spin_lock(&mp->m_sb_lock);
1188 percpu_counter_add(&mp->m_fdblocks, -delta);
1189 if (!rsvd)
1190 goto fdblocks_enospc;
1191
1192 lcounter = (long long)mp->m_resblks_avail + delta;
1193 if (lcounter >= 0) {
1194 mp->m_resblks_avail = lcounter;
1195 spin_unlock(&mp->m_sb_lock);
1196 return 0;
1197 }
1198 printk_once(KERN_WARNING
1199 "Filesystem \"%s\": reserve blocks depleted! "
1200 "Consider increasing reserve pool size.",
1201 mp->m_fsname);
1202fdblocks_enospc:
1203 spin_unlock(&mp->m_sb_lock);
1204 return -ENOSPC;
1205}
1206
1207int
1208xfs_mod_frextents(
1209 struct xfs_mount *mp,
1210 int64_t delta)
1211{
1212 int64_t lcounter;
1213 int ret = 0;
1214
1215 spin_lock(&mp->m_sb_lock);
1216 lcounter = mp->m_sb.sb_frextents + delta;
1217 if (lcounter < 0)
1218 ret = -ENOSPC;
1219 else
1220 mp->m_sb.sb_frextents = lcounter;
1221 spin_unlock(&mp->m_sb_lock);
1222 return ret;
1223}
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234struct xfs_buf *
1235xfs_getsb(
1236 struct xfs_mount *mp,
1237 int flags)
1238{
1239 struct xfs_buf *bp = mp->m_sb_bp;
1240
1241 if (!xfs_buf_trylock(bp)) {
1242 if (flags & XBF_TRYLOCK)
1243 return NULL;
1244 xfs_buf_lock(bp);
1245 }
1246
1247 xfs_buf_hold(bp);
1248 ASSERT(XFS_BUF_ISDONE(bp));
1249 return bp;
1250}
1251
1252
1253
1254
1255void
1256xfs_freesb(
1257 struct xfs_mount *mp)
1258{
1259 struct xfs_buf *bp = mp->m_sb_bp;
1260
1261 xfs_buf_lock(bp);
1262 mp->m_sb_bp = NULL;
1263 xfs_buf_relse(bp);
1264}
1265
1266
1267
1268
1269
1270int
1271xfs_dev_is_read_only(
1272 struct xfs_mount *mp,
1273 char *message)
1274{
1275 if (xfs_readonly_buftarg(mp->m_ddev_targp) ||
1276 xfs_readonly_buftarg(mp->m_logdev_targp) ||
1277 (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) {
1278 xfs_notice(mp, "%s required on read-only device.", message);
1279 xfs_notice(mp, "write access unavailable, cannot proceed.");
1280 return -EROFS;
1281 }
1282 return 0;
1283}
1284