forked from openzfs/zfs
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathzdb.c
8648 lines (7444 loc) · 234 KB
/
zdb.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011, 2019 by Delphix. All rights reserved.
* Copyright (c) 2014 Integros [integros.com]
* Copyright 2016 Nexenta Systems, Inc.
* Copyright (c) 2017, 2018 Lawrence Livermore National Security, LLC.
* Copyright (c) 2015, 2017, Intel Corporation.
* Copyright (c) 2020 Datto Inc.
* Copyright (c) 2020, The FreeBSD Foundation [1]
*
* [1] Portions of this software were developed by Allan Jude
* under sponsorship from the FreeBSD Foundation.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/spa_impl.h>
#include <sys/dmu.h>
#include <sys/zap.h>
#include <sys/fs/zfs.h>
#include <sys/zfs_znode.h>
#include <sys/zfs_sa.h>
#include <sys/sa.h>
#include <sys/sa_impl.h>
#include <sys/vdev.h>
#include <sys/vdev_impl.h>
#include <sys/metaslab_impl.h>
#include <sys/dmu_objset.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_pool.h>
#include <sys/dsl_bookmark.h>
#include <sys/dbuf.h>
#include <sys/zil.h>
#include <sys/zil_impl.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <sys/dmu_send.h>
#include <sys/dmu_traverse.h>
#include <sys/zio_checksum.h>
#include <sys/zio_compress.h>
#include <sys/zfs_fuid.h>
#include <sys/arc.h>
#include <sys/arc_impl.h>
#include <sys/ddt.h>
#include <sys/zfeature.h>
#include <sys/abd.h>
#include <sys/blkptr.h>
#include <sys/dsl_crypt.h>
#include <sys/dsl_scan.h>
#include <sys/btree.h>
#include <zfs_comutil.h>
#include <sys/zstd/zstd.h>
#include <libnvpair.h>
#include <libzutil.h>
#include "zdb.h"
#define ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ? \
zio_compress_table[(idx)].ci_name : "UNKNOWN")
#define ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ? \
zio_checksum_table[(idx)].ci_name : "UNKNOWN")
#define ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) : \
(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ? \
DMU_OT_ZAP_OTHER : \
(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
static char *
zdb_ot_name(dmu_object_type_t type)
{
if (type < DMU_OT_NUMTYPES)
return (dmu_ot[type].ot_name);
else if ((type & DMU_OT_NEWTYPE) &&
((type & DMU_OT_BYTESWAP_MASK) < DMU_BSWAP_NUMFUNCS))
return (dmu_ot_byteswap[type & DMU_OT_BYTESWAP_MASK].ob_name);
else
return ("UNKNOWN");
}
extern int reference_tracking_enable;
extern int zfs_recover;
extern unsigned long zfs_arc_meta_min, zfs_arc_meta_limit;
extern int zfs_vdev_async_read_max_active;
extern boolean_t spa_load_verify_dryrun;
extern int zfs_reconstruct_indirect_combinations_max;
extern int zfs_btree_verify_intensity;
static const char cmdname[] = "zdb";
uint8_t dump_opt[256];
typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
uint64_t *zopt_metaslab = NULL;
static unsigned zopt_metaslab_args = 0;
typedef struct zopt_object_range {
uint64_t zor_obj_start;
uint64_t zor_obj_end;
uint64_t zor_flags;
} zopt_object_range_t;
zopt_object_range_t *zopt_object_ranges = NULL;
static unsigned zopt_object_args = 0;
static int flagbits[256];
#define ZOR_FLAG_PLAIN_FILE 0x0001
#define ZOR_FLAG_DIRECTORY 0x0002
#define ZOR_FLAG_SPACE_MAP 0x0004
#define ZOR_FLAG_ZAP 0x0008
#define ZOR_FLAG_ALL_TYPES -1
#define ZOR_SUPPORTED_FLAGS (ZOR_FLAG_PLAIN_FILE | \
ZOR_FLAG_DIRECTORY | \
ZOR_FLAG_SPACE_MAP | \
ZOR_FLAG_ZAP)
#define ZDB_FLAG_CHECKSUM 0x0001
#define ZDB_FLAG_DECOMPRESS 0x0002
#define ZDB_FLAG_BSWAP 0x0004
#define ZDB_FLAG_GBH 0x0008
#define ZDB_FLAG_INDIRECT 0x0010
#define ZDB_FLAG_RAW 0x0020
#define ZDB_FLAG_PRINT_BLKPTR 0x0040
#define ZDB_FLAG_VERBOSE 0x0080
uint64_t max_inflight_bytes = 256 * 1024 * 1024; /* 256MB */
static int leaked_objects = 0;
static range_tree_t *mos_refd_objs;
static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *,
boolean_t);
static void mos_obj_refd(uint64_t);
static void mos_obj_refd_multiple(uint64_t);
static int dump_bpobj_cb(void *arg, const blkptr_t *bp, boolean_t free,
dmu_tx_t *tx);
typedef struct sublivelist_verify {
/* all ALLOC'd blkptr_t in one sub-livelist */
zfs_btree_t sv_all_allocs;
/* all FREE'd blkptr_t in one sub-livelist */
zfs_btree_t sv_all_frees;
/* FREE's that haven't yet matched to an ALLOC, in one sub-livelist */
zfs_btree_t sv_pair;
/* ALLOC's without a matching FREE, accumulates across sub-livelists */
zfs_btree_t sv_leftover;
} sublivelist_verify_t;
static int
livelist_compare(const void *larg, const void *rarg)
{
const blkptr_t *l = larg;
const blkptr_t *r = rarg;
/* Sort them according to dva[0] */
uint64_t l_dva0_vdev, r_dva0_vdev;
l_dva0_vdev = DVA_GET_VDEV(&l->blk_dva[0]);
r_dva0_vdev = DVA_GET_VDEV(&r->blk_dva[0]);
if (l_dva0_vdev < r_dva0_vdev)
return (-1);
else if (l_dva0_vdev > r_dva0_vdev)
return (+1);
/* if vdevs are equal, sort by offsets. */
uint64_t l_dva0_offset;
uint64_t r_dva0_offset;
l_dva0_offset = DVA_GET_OFFSET(&l->blk_dva[0]);
r_dva0_offset = DVA_GET_OFFSET(&r->blk_dva[0]);
if (l_dva0_offset < r_dva0_offset) {
return (-1);
} else if (l_dva0_offset > r_dva0_offset) {
return (+1);
}
/*
* Since we're storing blkptrs without cancelling FREE/ALLOC pairs,
* it's possible the offsets are equal. In that case, sort by txg
*/
if (l->blk_birth < r->blk_birth) {
return (-1);
} else if (l->blk_birth > r->blk_birth) {
return (+1);
}
return (0);
}
typedef struct sublivelist_verify_block {
dva_t svb_dva;
/*
* We need this to check if the block marked as allocated
* in the livelist was freed (and potentially reallocated)
* in the metaslab spacemaps at a later TXG.
*/
uint64_t svb_allocated_txg;
} sublivelist_verify_block_t;
static void zdb_print_blkptr(const blkptr_t *bp, int flags);
static int
sublivelist_verify_blkptr(void *arg, const blkptr_t *bp, boolean_t free,
dmu_tx_t *tx)
{
ASSERT3P(tx, ==, NULL);
struct sublivelist_verify *sv = arg;
char blkbuf[BP_SPRINTF_LEN];
zfs_btree_index_t where;
if (free) {
zfs_btree_add(&sv->sv_pair, bp);
/* Check if the FREE is a duplicate */
if (zfs_btree_find(&sv->sv_all_frees, bp, &where) != NULL) {
snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp,
free);
(void) printf("\tERROR: Duplicate FREE: %s\n", blkbuf);
} else {
zfs_btree_add_idx(&sv->sv_all_frees, bp, &where);
}
} else {
/* Check if the ALLOC has been freed */
if (zfs_btree_find(&sv->sv_pair, bp, &where) != NULL) {
zfs_btree_remove_idx(&sv->sv_pair, &where);
} else {
for (int i = 0; i < SPA_DVAS_PER_BP; i++) {
if (DVA_IS_EMPTY(&bp->blk_dva[i]))
break;
sublivelist_verify_block_t svb = {
.svb_dva = bp->blk_dva[i],
.svb_allocated_txg = bp->blk_birth
};
if (zfs_btree_find(&sv->sv_leftover, &svb,
&where) == NULL) {
zfs_btree_add_idx(&sv->sv_leftover,
&svb, &where);
}
}
}
/* Check if the ALLOC is a duplicate */
if (zfs_btree_find(&sv->sv_all_allocs, bp, &where) != NULL) {
snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp,
free);
(void) printf("\tERROR: Duplicate ALLOC: %s\n", blkbuf);
} else {
zfs_btree_add_idx(&sv->sv_all_allocs, bp, &where);
}
}
return (0);
}
static int
sublivelist_verify_func(void *args, dsl_deadlist_entry_t *dle)
{
int err;
char blkbuf[BP_SPRINTF_LEN];
struct sublivelist_verify *sv = args;
zfs_btree_create(&sv->sv_all_allocs, livelist_compare,
sizeof (blkptr_t));
zfs_btree_create(&sv->sv_all_frees, livelist_compare,
sizeof (blkptr_t));
zfs_btree_create(&sv->sv_pair, livelist_compare,
sizeof (blkptr_t));
err = bpobj_iterate_nofree(&dle->dle_bpobj, sublivelist_verify_blkptr,
sv, NULL);
zfs_btree_clear(&sv->sv_all_allocs);
zfs_btree_destroy(&sv->sv_all_allocs);
zfs_btree_clear(&sv->sv_all_frees);
zfs_btree_destroy(&sv->sv_all_frees);
blkptr_t *e;
zfs_btree_index_t *cookie = NULL;
while ((e = zfs_btree_destroy_nodes(&sv->sv_pair, &cookie)) != NULL) {
snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), e, B_TRUE);
(void) printf("\tERROR: Unmatched FREE: %s\n", blkbuf);
}
zfs_btree_destroy(&sv->sv_pair);
return (err);
}
static int
livelist_block_compare(const void *larg, const void *rarg)
{
const sublivelist_verify_block_t *l = larg;
const sublivelist_verify_block_t *r = rarg;
if (DVA_GET_VDEV(&l->svb_dva) < DVA_GET_VDEV(&r->svb_dva))
return (-1);
else if (DVA_GET_VDEV(&l->svb_dva) > DVA_GET_VDEV(&r->svb_dva))
return (+1);
if (DVA_GET_OFFSET(&l->svb_dva) < DVA_GET_OFFSET(&r->svb_dva))
return (-1);
else if (DVA_GET_OFFSET(&l->svb_dva) > DVA_GET_OFFSET(&r->svb_dva))
return (+1);
if (DVA_GET_ASIZE(&l->svb_dva) < DVA_GET_ASIZE(&r->svb_dva))
return (-1);
else if (DVA_GET_ASIZE(&l->svb_dva) > DVA_GET_ASIZE(&r->svb_dva))
return (+1);
return (0);
}
/*
* Check for errors in a livelist while tracking all unfreed ALLOCs in the
* sublivelist_verify_t: sv->sv_leftover
*/
static void
livelist_verify(dsl_deadlist_t *dl, void *arg)
{
sublivelist_verify_t *sv = arg;
dsl_deadlist_iterate(dl, sublivelist_verify_func, sv);
}
/*
* Check for errors in the livelist entry and discard the intermediary
* data structures
*/
/* ARGSUSED */
static int
sublivelist_verify_lightweight(void *args, dsl_deadlist_entry_t *dle)
{
sublivelist_verify_t sv;
zfs_btree_create(&sv.sv_leftover, livelist_block_compare,
sizeof (sublivelist_verify_block_t));
int err = sublivelist_verify_func(&sv, dle);
zfs_btree_clear(&sv.sv_leftover);
zfs_btree_destroy(&sv.sv_leftover);
return (err);
}
typedef struct metaslab_verify {
/*
* Tree containing all the leftover ALLOCs from the livelists
* that are part of this metaslab.
*/
zfs_btree_t mv_livelist_allocs;
/*
* Metaslab information.
*/
uint64_t mv_vdid;
uint64_t mv_msid;
uint64_t mv_start;
uint64_t mv_end;
/*
* What's currently allocated for this metaslab.
*/
range_tree_t *mv_allocated;
} metaslab_verify_t;
typedef void ll_iter_t(dsl_deadlist_t *ll, void *arg);
typedef int (*zdb_log_sm_cb_t)(spa_t *spa, space_map_entry_t *sme, uint64_t txg,
void *arg);
typedef struct unflushed_iter_cb_arg {
spa_t *uic_spa;
uint64_t uic_txg;
void *uic_arg;
zdb_log_sm_cb_t uic_cb;
} unflushed_iter_cb_arg_t;
static int
iterate_through_spacemap_logs_cb(space_map_entry_t *sme, void *arg)
{
unflushed_iter_cb_arg_t *uic = arg;
return (uic->uic_cb(uic->uic_spa, sme, uic->uic_txg, uic->uic_arg));
}
static void
iterate_through_spacemap_logs(spa_t *spa, zdb_log_sm_cb_t cb, void *arg)
{
if (!spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP))
return;
spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
for (spa_log_sm_t *sls = avl_first(&spa->spa_sm_logs_by_txg);
sls; sls = AVL_NEXT(&spa->spa_sm_logs_by_txg, sls)) {
space_map_t *sm = NULL;
VERIFY0(space_map_open(&sm, spa_meta_objset(spa),
sls->sls_sm_obj, 0, UINT64_MAX, SPA_MINBLOCKSHIFT));
unflushed_iter_cb_arg_t uic = {
.uic_spa = spa,
.uic_txg = sls->sls_txg,
.uic_arg = arg,
.uic_cb = cb
};
VERIFY0(space_map_iterate(sm, space_map_length(sm),
iterate_through_spacemap_logs_cb, &uic));
space_map_close(sm);
}
spa_config_exit(spa, SCL_CONFIG, FTAG);
}
static void
verify_livelist_allocs(metaslab_verify_t *mv, uint64_t txg,
uint64_t offset, uint64_t size)
{
sublivelist_verify_block_t svb;
DVA_SET_VDEV(&svb.svb_dva, mv->mv_vdid);
DVA_SET_OFFSET(&svb.svb_dva, offset);
DVA_SET_ASIZE(&svb.svb_dva, size);
zfs_btree_index_t where;
uint64_t end_offset = offset + size;
/*
* Look for an exact match for spacemap entry in the livelist entries.
* Then, look for other livelist entries that fall within the range
* of the spacemap entry as it may have been condensed
*/
sublivelist_verify_block_t *found =
zfs_btree_find(&mv->mv_livelist_allocs, &svb, &where);
if (found == NULL) {
found = zfs_btree_next(&mv->mv_livelist_allocs, &where, &where);
}
for (; found != NULL && DVA_GET_VDEV(&found->svb_dva) == mv->mv_vdid &&
DVA_GET_OFFSET(&found->svb_dva) < end_offset;
found = zfs_btree_next(&mv->mv_livelist_allocs, &where, &where)) {
if (found->svb_allocated_txg <= txg) {
(void) printf("ERROR: Livelist ALLOC [%llx:%llx] "
"from TXG %llx FREED at TXG %llx\n",
(u_longlong_t)DVA_GET_OFFSET(&found->svb_dva),
(u_longlong_t)DVA_GET_ASIZE(&found->svb_dva),
(u_longlong_t)found->svb_allocated_txg,
(u_longlong_t)txg);
}
}
}
static int
metaslab_spacemap_validation_cb(space_map_entry_t *sme, void *arg)
{
metaslab_verify_t *mv = arg;
uint64_t offset = sme->sme_offset;
uint64_t size = sme->sme_run;
uint64_t txg = sme->sme_txg;
if (sme->sme_type == SM_ALLOC) {
if (range_tree_contains(mv->mv_allocated,
offset, size)) {
(void) printf("ERROR: DOUBLE ALLOC: "
"%llu [%llx:%llx] "
"%llu:%llu LOG_SM\n",
(u_longlong_t)txg, (u_longlong_t)offset,
(u_longlong_t)size, (u_longlong_t)mv->mv_vdid,
(u_longlong_t)mv->mv_msid);
} else {
range_tree_add(mv->mv_allocated,
offset, size);
}
} else {
if (!range_tree_contains(mv->mv_allocated,
offset, size)) {
(void) printf("ERROR: DOUBLE FREE: "
"%llu [%llx:%llx] "
"%llu:%llu LOG_SM\n",
(u_longlong_t)txg, (u_longlong_t)offset,
(u_longlong_t)size, (u_longlong_t)mv->mv_vdid,
(u_longlong_t)mv->mv_msid);
} else {
range_tree_remove(mv->mv_allocated,
offset, size);
}
}
if (sme->sme_type != SM_ALLOC) {
/*
* If something is freed in the spacemap, verify that
* it is not listed as allocated in the livelist.
*/
verify_livelist_allocs(mv, txg, offset, size);
}
return (0);
}
static int
spacemap_check_sm_log_cb(spa_t *spa, space_map_entry_t *sme,
uint64_t txg, void *arg)
{
metaslab_verify_t *mv = arg;
uint64_t offset = sme->sme_offset;
uint64_t vdev_id = sme->sme_vdev;
vdev_t *vd = vdev_lookup_top(spa, vdev_id);
/* skip indirect vdevs */
if (!vdev_is_concrete(vd))
return (0);
if (vdev_id != mv->mv_vdid)
return (0);
metaslab_t *ms = vd->vdev_ms[offset >> vd->vdev_ms_shift];
if (ms->ms_id != mv->mv_msid)
return (0);
if (txg < metaslab_unflushed_txg(ms))
return (0);
ASSERT3U(txg, ==, sme->sme_txg);
return (metaslab_spacemap_validation_cb(sme, mv));
}
static void
spacemap_check_sm_log(spa_t *spa, metaslab_verify_t *mv)
{
iterate_through_spacemap_logs(spa, spacemap_check_sm_log_cb, mv);
}
static void
spacemap_check_ms_sm(space_map_t *sm, metaslab_verify_t *mv)
{
if (sm == NULL)
return;
VERIFY0(space_map_iterate(sm, space_map_length(sm),
metaslab_spacemap_validation_cb, mv));
}
static void iterate_deleted_livelists(spa_t *spa, ll_iter_t func, void *arg);
/*
* Transfer blocks from sv_leftover tree to the mv_livelist_allocs if
* they are part of that metaslab (mv_msid).
*/
static void
mv_populate_livelist_allocs(metaslab_verify_t *mv, sublivelist_verify_t *sv)
{
zfs_btree_index_t where;
sublivelist_verify_block_t *svb;
ASSERT3U(zfs_btree_numnodes(&mv->mv_livelist_allocs), ==, 0);
for (svb = zfs_btree_first(&sv->sv_leftover, &where);
svb != NULL;
svb = zfs_btree_next(&sv->sv_leftover, &where, &where)) {
if (DVA_GET_VDEV(&svb->svb_dva) != mv->mv_vdid)
continue;
if (DVA_GET_OFFSET(&svb->svb_dva) < mv->mv_start &&
(DVA_GET_OFFSET(&svb->svb_dva) +
DVA_GET_ASIZE(&svb->svb_dva)) > mv->mv_start) {
(void) printf("ERROR: Found block that crosses "
"metaslab boundary: <%llu:%llx:%llx>\n",
(u_longlong_t)DVA_GET_VDEV(&svb->svb_dva),
(u_longlong_t)DVA_GET_OFFSET(&svb->svb_dva),
(u_longlong_t)DVA_GET_ASIZE(&svb->svb_dva));
continue;
}
if (DVA_GET_OFFSET(&svb->svb_dva) < mv->mv_start)
continue;
if (DVA_GET_OFFSET(&svb->svb_dva) >= mv->mv_end)
continue;
if ((DVA_GET_OFFSET(&svb->svb_dva) +
DVA_GET_ASIZE(&svb->svb_dva)) > mv->mv_end) {
(void) printf("ERROR: Found block that crosses "
"metaslab boundary: <%llu:%llx:%llx>\n",
(u_longlong_t)DVA_GET_VDEV(&svb->svb_dva),
(u_longlong_t)DVA_GET_OFFSET(&svb->svb_dva),
(u_longlong_t)DVA_GET_ASIZE(&svb->svb_dva));
continue;
}
zfs_btree_add(&mv->mv_livelist_allocs, svb);
}
for (svb = zfs_btree_first(&mv->mv_livelist_allocs, &where);
svb != NULL;
svb = zfs_btree_next(&mv->mv_livelist_allocs, &where, &where)) {
zfs_btree_remove(&sv->sv_leftover, svb);
}
}
/*
* [Livelist Check]
* Iterate through all the sublivelists and:
* - report leftover frees
* - report double ALLOCs/FREEs
* - record leftover ALLOCs together with their TXG [see Cross Check]
*
* [Spacemap Check]
* for each metaslab:
* - iterate over spacemap and then the metaslab's entries in the
* spacemap log, then report any double FREEs and ALLOCs (do not
* blow up).
*
* [Cross Check]
* After finishing the Livelist Check phase and while being in the
* Spacemap Check phase, we find all the recorded leftover ALLOCs
* of the livelist check that are part of the metaslab that we are
* currently looking at in the Spacemap Check. We report any entries
* that are marked as ALLOCs in the livelists but have been actually
* freed (and potentially allocated again) after their TXG stamp in
* the spacemaps. Also report any ALLOCs from the livelists that
* belong to indirect vdevs (e.g. their vdev completed removal).
*
* Note that this will miss Log Spacemap entries that cancelled each other
* out before being flushed to the metaslab, so we are not guaranteed
* to match all erroneous ALLOCs.
*/
static void
livelist_metaslab_validate(spa_t *spa)
{
(void) printf("Verifying deleted livelist entries\n");
sublivelist_verify_t sv;
zfs_btree_create(&sv.sv_leftover, livelist_block_compare,
sizeof (sublivelist_verify_block_t));
iterate_deleted_livelists(spa, livelist_verify, &sv);
(void) printf("Verifying metaslab entries\n");
vdev_t *rvd = spa->spa_root_vdev;
for (uint64_t c = 0; c < rvd->vdev_children; c++) {
vdev_t *vd = rvd->vdev_child[c];
if (!vdev_is_concrete(vd))
continue;
for (uint64_t mid = 0; mid < vd->vdev_ms_count; mid++) {
metaslab_t *m = vd->vdev_ms[mid];
(void) fprintf(stderr,
"\rverifying concrete vdev %llu, "
"metaslab %llu of %llu ...",
(longlong_t)vd->vdev_id,
(longlong_t)mid,
(longlong_t)vd->vdev_ms_count);
uint64_t shift, start;
range_seg_type_t type =
metaslab_calculate_range_tree_type(vd, m,
&start, &shift);
metaslab_verify_t mv;
mv.mv_allocated = range_tree_create(NULL,
type, NULL, start, shift);
mv.mv_vdid = vd->vdev_id;
mv.mv_msid = m->ms_id;
mv.mv_start = m->ms_start;
mv.mv_end = m->ms_start + m->ms_size;
zfs_btree_create(&mv.mv_livelist_allocs,
livelist_block_compare,
sizeof (sublivelist_verify_block_t));
mv_populate_livelist_allocs(&mv, &sv);
spacemap_check_ms_sm(m->ms_sm, &mv);
spacemap_check_sm_log(spa, &mv);
range_tree_vacate(mv.mv_allocated, NULL, NULL);
range_tree_destroy(mv.mv_allocated);
zfs_btree_clear(&mv.mv_livelist_allocs);
zfs_btree_destroy(&mv.mv_livelist_allocs);
}
}
(void) fprintf(stderr, "\n");
/*
* If there are any segments in the leftover tree after we walked
* through all the metaslabs in the concrete vdevs then this means
* that we have segments in the livelists that belong to indirect
* vdevs and are marked as allocated.
*/
if (zfs_btree_numnodes(&sv.sv_leftover) == 0) {
zfs_btree_destroy(&sv.sv_leftover);
return;
}
(void) printf("ERROR: Found livelist blocks marked as allocated "
"for indirect vdevs:\n");
zfs_btree_index_t *where = NULL;
sublivelist_verify_block_t *svb;
while ((svb = zfs_btree_destroy_nodes(&sv.sv_leftover, &where)) !=
NULL) {
int vdev_id = DVA_GET_VDEV(&svb->svb_dva);
ASSERT3U(vdev_id, <, rvd->vdev_children);
vdev_t *vd = rvd->vdev_child[vdev_id];
ASSERT(!vdev_is_concrete(vd));
(void) printf("<%d:%llx:%llx> TXG %llx\n",
vdev_id, (u_longlong_t)DVA_GET_OFFSET(&svb->svb_dva),
(u_longlong_t)DVA_GET_ASIZE(&svb->svb_dva),
(u_longlong_t)svb->svb_allocated_txg);
}
(void) printf("\n");
zfs_btree_destroy(&sv.sv_leftover);
}
/*
* These libumem hooks provide a reasonable set of defaults for the allocator's
* debugging facilities.
*/
const char *
_umem_debug_init(void)
{
return ("default,verbose"); /* $UMEM_DEBUG setting */
}
const char *
_umem_logging_init(void)
{
return ("fail,contents"); /* $UMEM_LOGGING setting */
}
static void
usage(void)
{
(void) fprintf(stderr,
"Usage:\t%s [-AbcdDFGhikLMPsvXy] [-e [-V] [-p <path> ...]] "
"[-I <inflight I/Os>]\n"
"\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
"\t\t[<poolname>[/<dataset | objset id>] [<object | range> ...]]\n"
"\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
"\t\t[<poolname>[/<dataset | objset id>] [<object | range> ...]\n"
"\t%s [-v] <bookmark>\n"
"\t%s -C [-A] [-U <cache>]\n"
"\t%s -l [-Aqu] <device>\n"
"\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
"[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
"\t%s -O <dataset> <path>\n"
"\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
"\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
"\t%s -E [-A] word0:word1:...:word15\n"
"\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
"<poolname>\n\n",
cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
cmdname, cmdname, cmdname);
(void) fprintf(stderr, " Dataset name must include at least one "
"separator character '/' or '@'\n");
(void) fprintf(stderr, " If dataset name is specified, only that "
"dataset is dumped\n");
(void) fprintf(stderr, " If object numbers or object number "
"ranges are specified, only those\n"
" objects or ranges are dumped.\n\n");
(void) fprintf(stderr,
" Object ranges take the form <start>:<end>[:<flags>]\n"
" start Starting object number\n"
" end Ending object number, or -1 for no upper bound\n"
" flags Optional flags to select object types:\n"
" A All objects (this is the default)\n"
" d ZFS directories\n"
" f ZFS files \n"
" m SPA space maps\n"
" z ZAPs\n"
" - Negate effect of next flag\n\n");
(void) fprintf(stderr, " Options to control amount of output:\n");
(void) fprintf(stderr, " -b block statistics\n");
(void) fprintf(stderr, " -c checksum all metadata (twice for "
"all data) blocks\n");
(void) fprintf(stderr, " -C config (or cachefile if alone)\n");
(void) fprintf(stderr, " -d dataset(s)\n");
(void) fprintf(stderr, " -D dedup statistics\n");
(void) fprintf(stderr, " -E decode and display block from an "
"embedded block pointer\n");
(void) fprintf(stderr, " -h pool history\n");
(void) fprintf(stderr, " -i intent logs\n");
(void) fprintf(stderr, " -l read label contents\n");
(void) fprintf(stderr, " -k examine the checkpointed state "
"of the pool\n");
(void) fprintf(stderr, " -L disable leak tracking (do not "
"load spacemaps)\n");
(void) fprintf(stderr, " -m metaslabs\n");
(void) fprintf(stderr, " -M metaslab groups\n");
(void) fprintf(stderr, " -O perform object lookups by path\n");
(void) fprintf(stderr, " -R read and display block from a "
"device\n");
(void) fprintf(stderr, " -s report stats on zdb's I/O\n");
(void) fprintf(stderr, " -S simulate dedup to measure effect\n");
(void) fprintf(stderr, " -v verbose (applies to all "
"others)\n");
(void) fprintf(stderr, " -y perform livelist and metaslab "
"validation on any livelists being deleted\n\n");
(void) fprintf(stderr, " Below options are intended for use "
"with other options:\n");
(void) fprintf(stderr, " -A ignore assertions (-A), enable "
"panic recovery (-AA) or both (-AAA)\n");
(void) fprintf(stderr, " -e pool is exported/destroyed/"
"has altroot/not in a cachefile\n");
(void) fprintf(stderr, " -F attempt automatic rewind within "
"safe range of transaction groups\n");
(void) fprintf(stderr, " -G dump zfs_dbgmsg buffer before "
"exiting\n");
(void) fprintf(stderr, " -I <number of inflight I/Os> -- "
"specify the maximum number of\n "
"checksumming I/Os [default is 200]\n");
(void) fprintf(stderr, " -o <variable>=<value> set global "
"variable to an unsigned 32-bit integer\n");
(void) fprintf(stderr, " -p <path> -- use one or more with "
"-e to specify path to vdev dir\n");
(void) fprintf(stderr, " -P print numbers in parseable form\n");
(void) fprintf(stderr, " -q don't print label contents\n");
(void) fprintf(stderr, " -t <txg> -- highest txg to use when "
"searching for uberblocks\n");
(void) fprintf(stderr, " -u uberblock\n");
(void) fprintf(stderr, " -U <cachefile_path> -- use alternate "
"cachefile\n");
(void) fprintf(stderr, " -V do verbatim import\n");
(void) fprintf(stderr, " -x <dumpdir> -- "
"dump all read blocks into specified directory\n");
(void) fprintf(stderr, " -X attempt extreme rewind (does not "
"work with dataset)\n");
(void) fprintf(stderr, " -Y attempt all reconstruction "
"combinations for split blocks\n");
(void) fprintf(stderr, " -Z show ZSTD headers \n");
(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
"to make only that option verbose\n");
(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
exit(1);
}
static void
dump_debug_buffer(void)
{
if (dump_opt['G']) {
(void) printf("\n");
(void) fflush(stdout);
zfs_dbgmsg_print("zdb");
}
}
/*
* Called for usage errors that are discovered after a call to spa_open(),
* dmu_bonus_hold(), or pool_match(). abort() is called for other errors.
*/
static void
fatal(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void) fprintf(stderr, "%s: ", cmdname);
(void) vfprintf(stderr, fmt, ap);
va_end(ap);
(void) fprintf(stderr, "\n");
dump_debug_buffer();
exit(1);
}
/* ARGSUSED */
static void
dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
{
nvlist_t *nv;
size_t nvsize = *(uint64_t *)data;
char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
umem_free(packed, nvsize);
dump_nvlist(nv, 8);
nvlist_free(nv);
}
/* ARGSUSED */
static void
dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
{
spa_history_phys_t *shp = data;
if (shp == NULL)
return;
(void) printf("\t\tpool_create_len = %llu\n",
(u_longlong_t)shp->sh_pool_create_len);
(void) printf("\t\tphys_max_off = %llu\n",
(u_longlong_t)shp->sh_phys_max_off);
(void) printf("\t\tbof = %llu\n",
(u_longlong_t)shp->sh_bof);
(void) printf("\t\teof = %llu\n",
(u_longlong_t)shp->sh_eof);
(void) printf("\t\trecords_lost = %llu\n",
(u_longlong_t)shp->sh_records_lost);
}
static void
zdb_nicenum(uint64_t num, char *buf, size_t buflen)
{
if (dump_opt['P'])
(void) snprintf(buf, buflen, "%llu", (longlong_t)num);
else
nicenum(num, buf, sizeof (buf));
}
static const char histo_stars[] = "****************************************";
static const uint64_t histo_width = sizeof (histo_stars) - 1;
static void
dump_histogram(const uint64_t *histo, int size, int offset)
{
int i;
int minidx = size - 1;
int maxidx = 0;
uint64_t max = 0;
for (i = 0; i < size; i++) {
if (histo[i] > max)
max = histo[i];
if (histo[i] > 0 && i > maxidx)
maxidx = i;
if (histo[i] > 0 && i < minidx)
minidx = i;
}
if (max < histo_width)
max = histo_width;
for (i = minidx; i <= maxidx; i++) {
(void) printf("\t\t\t%3u: %6llu %s\n",
i + offset, (u_longlong_t)histo[i],
&histo_stars[(max - histo[i]) * histo_width / max]);
}
}
static void
dump_zap_stats(objset_t *os, uint64_t object)
{
int error;
zap_stats_t zs;
error = zap_get_stats(os, object, &zs);
if (error)
return;
if (zs.zs_ptrtbl_len == 0) {
ASSERT(zs.zs_num_blocks == 1);
(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
(u_longlong_t)zs.zs_blocksize,
(u_longlong_t)zs.zs_num_entries);
return;
}
(void) printf("\tFat ZAP stats:\n");
(void) printf("\t\tPointer table:\n");
(void) printf("\t\t\t%llu elements\n",
(u_longlong_t)zs.zs_ptrtbl_len);
(void) printf("\t\t\tzt_blk: %llu\n",
(u_longlong_t)zs.zs_ptrtbl_zt_blk);
(void) printf("\t\t\tzt_numblks: %llu\n",
(u_longlong_t)zs.zs_ptrtbl_zt_numblks);
(void) printf("\t\t\tzt_shift: %llu\n",
(u_longlong_t)zs.zs_ptrtbl_zt_shift);
(void) printf("\t\t\tzt_blks_copied: %llu\n",
(u_longlong_t)zs.zs_ptrtbl_blks_copied);
(void) printf("\t\t\tzt_nextblk: %llu\n",
(u_longlong_t)zs.zs_ptrtbl_nextblk);
(void) printf("\t\tZAP entries: %llu\n",
(u_longlong_t)zs.zs_num_entries);
(void) printf("\t\tLeaf blocks: %llu\n",
(u_longlong_t)zs.zs_num_leafs);
(void) printf("\t\tTotal blocks: %llu\n",
(u_longlong_t)zs.zs_num_blocks);
(void) printf("\t\tzap_block_type: 0x%llx\n",
(u_longlong_t)zs.zs_block_type);