zdb.c revision 17fb938fd6cdce3ff1bb47dafda0774f742249a3
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011, 2017 by Delphix. All rights reserved.
25 * Copyright (c) 2014 Integros [integros.com]
26 * Copyright 2017 Nexenta Systems, Inc.
27 * Copyright 2017 RackTop Systems.
28 */
29
30#include <stdio.h>
31#include <unistd.h>
32#include <stdio_ext.h>
33#include <stdlib.h>
34#include <ctype.h>
35#include <sys/zfs_context.h>
36#include <sys/spa.h>
37#include <sys/spa_impl.h>
38#include <sys/dmu.h>
39#include <sys/zap.h>
40#include <sys/fs/zfs.h>
41#include <sys/zfs_znode.h>
42#include <sys/zfs_sa.h>
43#include <sys/sa.h>
44#include <sys/sa_impl.h>
45#include <sys/vdev.h>
46#include <sys/vdev_impl.h>
47#include <sys/metaslab_impl.h>
48#include <sys/dmu_objset.h>
49#include <sys/dsl_dir.h>
50#include <sys/dsl_dataset.h>
51#include <sys/dsl_pool.h>
52#include <sys/dbuf.h>
53#include <sys/zil.h>
54#include <sys/zil_impl.h>
55#include <sys/stat.h>
56#include <sys/resource.h>
57#include <sys/dmu_traverse.h>
58#include <sys/zio_checksum.h>
59#include <sys/zio_compress.h>
60#include <sys/zfs_fuid.h>
61#include <sys/arc.h>
62#include <sys/ddt.h>
63#include <sys/zfeature.h>
64#include <sys/abd.h>
65#include <sys/blkptr.h>
66#include <sys/dsl_scan.h>
67#include <zfs_comutil.h>
68#include <libcmdutils.h>
69#undef verify
70#include <libzfs.h>
71
72#include "zdb.h"
73
74#define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
75	zio_compress_table[(idx)].ci_name : "UNKNOWN")
76#define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
77	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
78#define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
79	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
80	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
81#define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
82	(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ?	\
83	DMU_OT_ZAP_OTHER : \
84	(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
85	DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
86
87#ifndef lint
88extern int reference_tracking_enable;
89extern boolean_t zfs_recover;
90extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
91extern int zfs_vdev_async_read_max_active;
92extern int aok;
93extern boolean_t spa_load_verify_dryrun;
94#else
95int reference_tracking_enable;
96boolean_t zfs_recover;
97uint64_t zfs_arc_max, zfs_arc_meta_limit;
98int zfs_vdev_async_read_max_active;
99int aok;
100boolean_t spa_load_verify_dryrun;
101#endif
102
103static const char cmdname[] = "zdb";
104uint8_t dump_opt[256];
105
106typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
107
108uint64_t *zopt_object = NULL;
109static unsigned zopt_objects = 0;
110libzfs_handle_t *g_zfs;
111uint64_t max_inflight = 1000;
112static int leaked_objects = 0;
113
114static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
115static void mos_obj_refd(uint64_t);
116
117/*
118 * These libumem hooks provide a reasonable set of defaults for the allocator's
119 * debugging facilities.
120 */
121const char *
122_umem_debug_init()
123{
124	return ("default,verbose"); /* $UMEM_DEBUG setting */
125}
126
127const char *
128_umem_logging_init(void)
129{
130	return ("fail,contents"); /* $UMEM_LOGGING setting */
131}
132
133static void
134usage(void)
135{
136	(void) fprintf(stderr,
137	    "Usage:\t%s [-AbcdDFGhikLMPsvX] [-e [-V] [-p <path> ...]] "
138	    "[-I <inflight I/Os>]\n"
139	    "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
140	    "\t\t[<poolname> [<object> ...]]\n"
141	    "\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset> "
142	    "[<object> ...]\n"
143	    "\t%s -C [-A] [-U <cache>]\n"
144	    "\t%s -l [-Aqu] <device>\n"
145	    "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
146	    "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
147	    "\t%s -O <dataset> <path>\n"
148	    "\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
149	    "\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
150	    "\t%s -E [-A] word0:word1:...:word15\n"
151	    "\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
152	    "<poolname>\n\n",
153	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
154	    cmdname, cmdname);
155
156	(void) fprintf(stderr, "    Dataset name must include at least one "
157	    "separator character '/' or '@'\n");
158	(void) fprintf(stderr, "    If dataset name is specified, only that "
159	    "dataset is dumped\n");
160	(void) fprintf(stderr, "    If object numbers are specified, only "
161	    "those objects are dumped\n\n");
162	(void) fprintf(stderr, "    Options to control amount of output:\n");
163	(void) fprintf(stderr, "        -b block statistics\n");
164	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
165	    "all data) blocks\n");
166	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
167	(void) fprintf(stderr, "        -d dataset(s)\n");
168	(void) fprintf(stderr, "        -D dedup statistics\n");
169	(void) fprintf(stderr, "        -E decode and display block from an "
170	    "embedded block pointer\n");
171	(void) fprintf(stderr, "        -h pool history\n");
172	(void) fprintf(stderr, "        -i intent logs\n");
173	(void) fprintf(stderr, "        -l read label contents\n");
174	(void) fprintf(stderr, "        -k examine the checkpointed state "
175	    "of the pool\n");
176	(void) fprintf(stderr, "        -L disable leak tracking (do not "
177	    "load spacemaps)\n");
178	(void) fprintf(stderr, "        -m metaslabs\n");
179	(void) fprintf(stderr, "        -M metaslab groups\n");
180	(void) fprintf(stderr, "        -O perform object lookups by path\n");
181	(void) fprintf(stderr, "        -R read and display block from a "
182	    "device\n");
183	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
184	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
185	(void) fprintf(stderr, "        -v verbose (applies to all "
186	    "others)\n\n");
187	(void) fprintf(stderr, "    Below options are intended for use "
188	    "with other options:\n");
189	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
190	    "panic recovery (-AA) or both (-AAA)\n");
191	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
192	    "has altroot/not in a cachefile\n");
193	(void) fprintf(stderr, "        -F attempt automatic rewind within "
194	    "safe range of transaction groups\n");
195	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
196	    "exiting\n");
197	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
198	    "specify the maximum number of "
199	    "checksumming I/Os [default is 200]\n");
200	(void) fprintf(stderr, "        -o <variable>=<value> set global "
201	    "variable to an unsigned 32-bit integer value\n");
202	(void) fprintf(stderr, "        -p <path> -- use one or more with "
203	    "-e to specify path to vdev dir\n");
204	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
205	(void) fprintf(stderr, "        -q don't print label contents\n");
206	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
207	    "searching for uberblocks\n");
208	(void) fprintf(stderr, "        -u uberblock\n");
209	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
210	    "cachefile\n");
211	(void) fprintf(stderr, "        -V do verbatim import\n");
212	(void) fprintf(stderr, "        -x <dumpdir> -- "
213	    "dump all read blocks into specified directory\n");
214	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
215	    "work with dataset)\n\n");
216	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
217	    "to make only that option verbose\n");
218	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
219	exit(1);
220}
221
222static void
223dump_debug_buffer()
224{
225	if (dump_opt['G']) {
226		(void) printf("\n");
227		zfs_dbgmsg_print("zdb");
228	}
229}
230
231/*
232 * Called for usage errors that are discovered after a call to spa_open(),
233 * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
234 */
235
236static void
237fatal(const char *fmt, ...)
238{
239	va_list ap;
240
241	va_start(ap, fmt);
242	(void) fprintf(stderr, "%s: ", cmdname);
243	(void) vfprintf(stderr, fmt, ap);
244	va_end(ap);
245	(void) fprintf(stderr, "\n");
246
247	dump_debug_buffer();
248
249	exit(1);
250}
251
252/* ARGSUSED */
253static void
254dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
255{
256	nvlist_t *nv;
257	size_t nvsize = *(uint64_t *)data;
258	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
259
260	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
261
262	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
263
264	umem_free(packed, nvsize);
265
266	dump_nvlist(nv, 8);
267
268	nvlist_free(nv);
269}
270
271/* ARGSUSED */
272static void
273dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
274{
275	spa_history_phys_t *shp = data;
276
277	if (shp == NULL)
278		return;
279
280	(void) printf("\t\tpool_create_len = %llu\n",
281	    (u_longlong_t)shp->sh_pool_create_len);
282	(void) printf("\t\tphys_max_off = %llu\n",
283	    (u_longlong_t)shp->sh_phys_max_off);
284	(void) printf("\t\tbof = %llu\n",
285	    (u_longlong_t)shp->sh_bof);
286	(void) printf("\t\teof = %llu\n",
287	    (u_longlong_t)shp->sh_eof);
288	(void) printf("\t\trecords_lost = %llu\n",
289	    (u_longlong_t)shp->sh_records_lost);
290}
291
292static void
293zdb_nicenum(uint64_t num, char *buf, size_t buflen)
294{
295	if (dump_opt['P'])
296		(void) snprintf(buf, buflen, "%llu", (longlong_t)num);
297	else
298		nicenum(num, buf, sizeof (buf));
299}
300
301static const char histo_stars[] = "****************************************";
302static const uint64_t histo_width = sizeof (histo_stars) - 1;
303
304static void
305dump_histogram(const uint64_t *histo, int size, int offset)
306{
307	int i;
308	int minidx = size - 1;
309	int maxidx = 0;
310	uint64_t max = 0;
311
312	for (i = 0; i < size; i++) {
313		if (histo[i] > max)
314			max = histo[i];
315		if (histo[i] > 0 && i > maxidx)
316			maxidx = i;
317		if (histo[i] > 0 && i < minidx)
318			minidx = i;
319	}
320
321	if (max < histo_width)
322		max = histo_width;
323
324	for (i = minidx; i <= maxidx; i++) {
325		(void) printf("\t\t\t%3u: %6llu %s\n",
326		    i + offset, (u_longlong_t)histo[i],
327		    &histo_stars[(max - histo[i]) * histo_width / max]);
328	}
329}
330
331static void
332dump_zap_stats(objset_t *os, uint64_t object)
333{
334	int error;
335	zap_stats_t zs;
336
337	error = zap_get_stats(os, object, &zs);
338	if (error)
339		return;
340
341	if (zs.zs_ptrtbl_len == 0) {
342		ASSERT(zs.zs_num_blocks == 1);
343		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
344		    (u_longlong_t)zs.zs_blocksize,
345		    (u_longlong_t)zs.zs_num_entries);
346		return;
347	}
348
349	(void) printf("\tFat ZAP stats:\n");
350
351	(void) printf("\t\tPointer table:\n");
352	(void) printf("\t\t\t%llu elements\n",
353	    (u_longlong_t)zs.zs_ptrtbl_len);
354	(void) printf("\t\t\tzt_blk: %llu\n",
355	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
356	(void) printf("\t\t\tzt_numblks: %llu\n",
357	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
358	(void) printf("\t\t\tzt_shift: %llu\n",
359	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
360	(void) printf("\t\t\tzt_blks_copied: %llu\n",
361	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
362	(void) printf("\t\t\tzt_nextblk: %llu\n",
363	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
364
365	(void) printf("\t\tZAP entries: %llu\n",
366	    (u_longlong_t)zs.zs_num_entries);
367	(void) printf("\t\tLeaf blocks: %llu\n",
368	    (u_longlong_t)zs.zs_num_leafs);
369	(void) printf("\t\tTotal blocks: %llu\n",
370	    (u_longlong_t)zs.zs_num_blocks);
371	(void) printf("\t\tzap_block_type: 0x%llx\n",
372	    (u_longlong_t)zs.zs_block_type);
373	(void) printf("\t\tzap_magic: 0x%llx\n",
374	    (u_longlong_t)zs.zs_magic);
375	(void) printf("\t\tzap_salt: 0x%llx\n",
376	    (u_longlong_t)zs.zs_salt);
377
378	(void) printf("\t\tLeafs with 2^n pointers:\n");
379	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
380
381	(void) printf("\t\tBlocks with n*5 entries:\n");
382	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
383
384	(void) printf("\t\tBlocks n/10 full:\n");
385	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
386
387	(void) printf("\t\tEntries with n chunks:\n");
388	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
389
390	(void) printf("\t\tBuckets with n entries:\n");
391	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
392}
393
394/*ARGSUSED*/
395static void
396dump_none(objset_t *os, uint64_t object, void *data, size_t size)
397{
398}
399
400/*ARGSUSED*/
401static void
402dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
403{
404	(void) printf("\tUNKNOWN OBJECT TYPE\n");
405}
406
407/*ARGSUSED*/
408static void
409dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
410{
411}
412
413/*ARGSUSED*/
414static void
415dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
416{
417}
418
419/*ARGSUSED*/
420static void
421dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
422{
423	zap_cursor_t zc;
424	zap_attribute_t attr;
425	void *prop;
426	unsigned i;
427
428	dump_zap_stats(os, object);
429	(void) printf("\n");
430
431	for (zap_cursor_init(&zc, os, object);
432	    zap_cursor_retrieve(&zc, &attr) == 0;
433	    zap_cursor_advance(&zc)) {
434		(void) printf("\t\t%s = ", attr.za_name);
435		if (attr.za_num_integers == 0) {
436			(void) printf("\n");
437			continue;
438		}
439		prop = umem_zalloc(attr.za_num_integers *
440		    attr.za_integer_length, UMEM_NOFAIL);
441		(void) zap_lookup(os, object, attr.za_name,
442		    attr.za_integer_length, attr.za_num_integers, prop);
443		if (attr.za_integer_length == 1) {
444			(void) printf("%s", (char *)prop);
445		} else {
446			for (i = 0; i < attr.za_num_integers; i++) {
447				switch (attr.za_integer_length) {
448				case 2:
449					(void) printf("%u ",
450					    ((uint16_t *)prop)[i]);
451					break;
452				case 4:
453					(void) printf("%u ",
454					    ((uint32_t *)prop)[i]);
455					break;
456				case 8:
457					(void) printf("%lld ",
458					    (u_longlong_t)((int64_t *)prop)[i]);
459					break;
460				}
461			}
462		}
463		(void) printf("\n");
464		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
465	}
466	zap_cursor_fini(&zc);
467}
468
469static void
470dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
471{
472	bpobj_phys_t *bpop = data;
473	char bytes[32], comp[32], uncomp[32];
474
475	/* make sure the output won't get truncated */
476	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
477	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
478	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
479
480	if (bpop == NULL)
481		return;
482
483	zdb_nicenum(bpop->bpo_bytes, bytes, sizeof (bytes));
484	zdb_nicenum(bpop->bpo_comp, comp, sizeof (comp));
485	zdb_nicenum(bpop->bpo_uncomp, uncomp, sizeof (uncomp));
486
487	(void) printf("\t\tnum_blkptrs = %llu\n",
488	    (u_longlong_t)bpop->bpo_num_blkptrs);
489	(void) printf("\t\tbytes = %s\n", bytes);
490	if (size >= BPOBJ_SIZE_V1) {
491		(void) printf("\t\tcomp = %s\n", comp);
492		(void) printf("\t\tuncomp = %s\n", uncomp);
493	}
494	if (size >= sizeof (*bpop)) {
495		(void) printf("\t\tsubobjs = %llu\n",
496		    (u_longlong_t)bpop->bpo_subobjs);
497		(void) printf("\t\tnum_subobjs = %llu\n",
498		    (u_longlong_t)bpop->bpo_num_subobjs);
499	}
500
501	if (dump_opt['d'] < 5)
502		return;
503
504	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
505		char blkbuf[BP_SPRINTF_LEN];
506		blkptr_t bp;
507
508		int err = dmu_read(os, object,
509		    i * sizeof (bp), sizeof (bp), &bp, 0);
510		if (err != 0) {
511			(void) printf("got error %u from dmu_read\n", err);
512			break;
513		}
514		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
515		(void) printf("\t%s\n", blkbuf);
516	}
517}
518
519/* ARGSUSED */
520static void
521dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
522{
523	dmu_object_info_t doi;
524
525	VERIFY0(dmu_object_info(os, object, &doi));
526	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
527
528	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
529	if (err != 0) {
530		(void) printf("got error %u from dmu_read\n", err);
531		kmem_free(subobjs, doi.doi_max_offset);
532		return;
533	}
534
535	int64_t last_nonzero = -1;
536	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
537		if (subobjs[i] != 0)
538			last_nonzero = i;
539	}
540
541	for (int64_t i = 0; i <= last_nonzero; i++) {
542		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
543	}
544	kmem_free(subobjs, doi.doi_max_offset);
545}
546
547/*ARGSUSED*/
548static void
549dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
550{
551	dump_zap_stats(os, object);
552	/* contents are printed elsewhere, properly decoded */
553}
554
555/*ARGSUSED*/
556static void
557dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
558{
559	zap_cursor_t zc;
560	zap_attribute_t attr;
561
562	dump_zap_stats(os, object);
563	(void) printf("\n");
564
565	for (zap_cursor_init(&zc, os, object);
566	    zap_cursor_retrieve(&zc, &attr) == 0;
567	    zap_cursor_advance(&zc)) {
568		(void) printf("\t\t%s = ", attr.za_name);
569		if (attr.za_num_integers == 0) {
570			(void) printf("\n");
571			continue;
572		}
573		(void) printf(" %llx : [%d:%d:%d]\n",
574		    (u_longlong_t)attr.za_first_integer,
575		    (int)ATTR_LENGTH(attr.za_first_integer),
576		    (int)ATTR_BSWAP(attr.za_first_integer),
577		    (int)ATTR_NUM(attr.za_first_integer));
578	}
579	zap_cursor_fini(&zc);
580}
581
582/*ARGSUSED*/
583static void
584dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
585{
586	zap_cursor_t zc;
587	zap_attribute_t attr;
588	uint16_t *layout_attrs;
589	unsigned i;
590
591	dump_zap_stats(os, object);
592	(void) printf("\n");
593
594	for (zap_cursor_init(&zc, os, object);
595	    zap_cursor_retrieve(&zc, &attr) == 0;
596	    zap_cursor_advance(&zc)) {
597		(void) printf("\t\t%s = [", attr.za_name);
598		if (attr.za_num_integers == 0) {
599			(void) printf("\n");
600			continue;
601		}
602
603		VERIFY(attr.za_integer_length == 2);
604		layout_attrs = umem_zalloc(attr.za_num_integers *
605		    attr.za_integer_length, UMEM_NOFAIL);
606
607		VERIFY(zap_lookup(os, object, attr.za_name,
608		    attr.za_integer_length,
609		    attr.za_num_integers, layout_attrs) == 0);
610
611		for (i = 0; i != attr.za_num_integers; i++)
612			(void) printf(" %d ", (int)layout_attrs[i]);
613		(void) printf("]\n");
614		umem_free(layout_attrs,
615		    attr.za_num_integers * attr.za_integer_length);
616	}
617	zap_cursor_fini(&zc);
618}
619
620/*ARGSUSED*/
621static void
622dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
623{
624	zap_cursor_t zc;
625	zap_attribute_t attr;
626	const char *typenames[] = {
627		/* 0 */ "not specified",
628		/* 1 */ "FIFO",
629		/* 2 */ "Character Device",
630		/* 3 */ "3 (invalid)",
631		/* 4 */ "Directory",
632		/* 5 */ "5 (invalid)",
633		/* 6 */ "Block Device",
634		/* 7 */ "7 (invalid)",
635		/* 8 */ "Regular File",
636		/* 9 */ "9 (invalid)",
637		/* 10 */ "Symbolic Link",
638		/* 11 */ "11 (invalid)",
639		/* 12 */ "Socket",
640		/* 13 */ "Door",
641		/* 14 */ "Event Port",
642		/* 15 */ "15 (invalid)",
643	};
644
645	dump_zap_stats(os, object);
646	(void) printf("\n");
647
648	for (zap_cursor_init(&zc, os, object);
649	    zap_cursor_retrieve(&zc, &attr) == 0;
650	    zap_cursor_advance(&zc)) {
651		(void) printf("\t\t%s = %lld (type: %s)\n",
652		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
653		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
654	}
655	zap_cursor_fini(&zc);
656}
657
658static int
659get_dtl_refcount(vdev_t *vd)
660{
661	int refcount = 0;
662
663	if (vd->vdev_ops->vdev_op_leaf) {
664		space_map_t *sm = vd->vdev_dtl_sm;
665
666		if (sm != NULL &&
667		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
668			return (1);
669		return (0);
670	}
671
672	for (unsigned c = 0; c < vd->vdev_children; c++)
673		refcount += get_dtl_refcount(vd->vdev_child[c]);
674	return (refcount);
675}
676
677static int
678get_metaslab_refcount(vdev_t *vd)
679{
680	int refcount = 0;
681
682	if (vd->vdev_top == vd) {
683		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
684			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
685
686			if (sm != NULL &&
687			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
688				refcount++;
689		}
690	}
691	for (unsigned c = 0; c < vd->vdev_children; c++)
692		refcount += get_metaslab_refcount(vd->vdev_child[c]);
693
694	return (refcount);
695}
696
697static int
698get_obsolete_refcount(vdev_t *vd)
699{
700	int refcount = 0;
701
702	uint64_t obsolete_sm_obj = vdev_obsolete_sm_object(vd);
703	if (vd->vdev_top == vd && obsolete_sm_obj != 0) {
704		dmu_object_info_t doi;
705		VERIFY0(dmu_object_info(vd->vdev_spa->spa_meta_objset,
706		    obsolete_sm_obj, &doi));
707		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
708			refcount++;
709		}
710	} else {
711		ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
712		ASSERT3U(obsolete_sm_obj, ==, 0);
713	}
714	for (unsigned c = 0; c < vd->vdev_children; c++) {
715		refcount += get_obsolete_refcount(vd->vdev_child[c]);
716	}
717
718	return (refcount);
719}
720
721static int
722get_prev_obsolete_spacemap_refcount(spa_t *spa)
723{
724	uint64_t prev_obj =
725	    spa->spa_condensing_indirect_phys.scip_prev_obsolete_sm_object;
726	if (prev_obj != 0) {
727		dmu_object_info_t doi;
728		VERIFY0(dmu_object_info(spa->spa_meta_objset, prev_obj, &doi));
729		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
730			return (1);
731		}
732	}
733	return (0);
734}
735
736static int
737get_checkpoint_refcount(vdev_t *vd)
738{
739	int refcount = 0;
740
741	if (vd->vdev_top == vd && vd->vdev_top_zap != 0 &&
742	    zap_contains(spa_meta_objset(vd->vdev_spa),
743	    vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) == 0)
744		refcount++;
745
746	for (uint64_t c = 0; c < vd->vdev_children; c++)
747		refcount += get_checkpoint_refcount(vd->vdev_child[c]);
748
749	return (refcount);
750}
751
752static int
753verify_spacemap_refcounts(spa_t *spa)
754{
755	uint64_t expected_refcount = 0;
756	uint64_t actual_refcount;
757
758	(void) feature_get_refcount(spa,
759	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
760	    &expected_refcount);
761	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
762	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
763	actual_refcount += get_obsolete_refcount(spa->spa_root_vdev);
764	actual_refcount += get_prev_obsolete_spacemap_refcount(spa);
765	actual_refcount += get_checkpoint_refcount(spa->spa_root_vdev);
766
767	if (expected_refcount != actual_refcount) {
768		(void) printf("space map refcount mismatch: expected %lld != "
769		    "actual %lld\n",
770		    (longlong_t)expected_refcount,
771		    (longlong_t)actual_refcount);
772		return (2);
773	}
774	return (0);
775}
776
777static void
778dump_spacemap(objset_t *os, space_map_t *sm)
779{
780	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
781	    "INVALID", "INVALID", "INVALID", "INVALID" };
782
783	if (sm == NULL)
784		return;
785
786	(void) printf("space map object %llu:\n",
787	    (longlong_t)sm->sm_phys->smp_object);
788	(void) printf("  smp_objsize = 0x%llx\n",
789	    (longlong_t)sm->sm_phys->smp_objsize);
790	(void) printf("  smp_alloc = 0x%llx\n",
791	    (longlong_t)sm->sm_phys->smp_alloc);
792
793	/*
794	 * Print out the freelist entries in both encoded and decoded form.
795	 */
796	uint8_t mapshift = sm->sm_shift;
797	int64_t alloc = 0;
798	uint64_t word;
799	for (uint64_t offset = 0; offset < space_map_length(sm);
800	    offset += sizeof (word)) {
801
802		VERIFY0(dmu_read(os, space_map_object(sm), offset,
803		    sizeof (word), &word, DMU_READ_PREFETCH));
804
805		if (sm_entry_is_debug(word)) {
806			(void) printf("\t    [%6llu] %s: txg %llu, pass %llu\n",
807			    (u_longlong_t)(offset / sizeof (word)),
808			    ddata[SM_DEBUG_ACTION_DECODE(word)],
809			    (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
810			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
811			continue;
812		}
813
814		uint8_t words;
815		char entry_type;
816		uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;
817
818		if (sm_entry_is_single_word(word)) {
819			entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
820			    'A' : 'F';
821			entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
822			    sm->sm_start;
823			entry_run = SM_RUN_DECODE(word) << mapshift;
824			words = 1;
825		} else {
826			/* it is a two-word entry so we read another word */
827			ASSERT(sm_entry_is_double_word(word));
828
829			uint64_t extra_word;
830			offset += sizeof (extra_word);
831			VERIFY0(dmu_read(os, space_map_object(sm), offset,
832			    sizeof (extra_word), &extra_word,
833			    DMU_READ_PREFETCH));
834
835			ASSERT3U(offset, <=, space_map_length(sm));
836
837			entry_run = SM2_RUN_DECODE(word) << mapshift;
838			entry_vdev = SM2_VDEV_DECODE(word);
839			entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
840			    'A' : 'F';
841			entry_off = (SM2_OFFSET_DECODE(extra_word) <<
842			    mapshift) + sm->sm_start;
843			words = 2;
844		}
845
846		(void) printf("\t    [%6llu]    %c  range:"
847		    " %010llx-%010llx  size: %06llx vdev: %06llu words: %u\n",
848		    (u_longlong_t)(offset / sizeof (word)),
849		    entry_type, (u_longlong_t)entry_off,
850		    (u_longlong_t)(entry_off + entry_run),
851		    (u_longlong_t)entry_run,
852		    (u_longlong_t)entry_vdev, words);
853
854		if (entry_type == 'A')
855			alloc += entry_run;
856		else
857			alloc -= entry_run;
858	}
859	if ((uint64_t)alloc != space_map_allocated(sm)) {
860		(void) printf("space_map_object alloc (%lld) INCONSISTENT "
861		    "with space map summary (%lld)\n",
862		    (longlong_t)space_map_allocated(sm), (longlong_t)alloc);
863	}
864}
865
866static void
867dump_metaslab_stats(metaslab_t *msp)
868{
869	char maxbuf[32];
870	range_tree_t *rt = msp->ms_allocatable;
871	avl_tree_t *t = &msp->ms_allocatable_by_size;
872	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
873
874	/* max sure nicenum has enough space */
875	CTASSERT(sizeof (maxbuf) >= NN_NUMBUF_SZ);
876
877	zdb_nicenum(metaslab_block_maxsize(msp), maxbuf, sizeof (maxbuf));
878
879	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
880	    "segments", avl_numnodes(t), "maxsize", maxbuf,
881	    "freepct", free_pct);
882	(void) printf("\tIn-memory histogram:\n");
883	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
884}
885
886static void
887dump_metaslab(metaslab_t *msp)
888{
889	vdev_t *vd = msp->ms_group->mg_vd;
890	spa_t *spa = vd->vdev_spa;
891	space_map_t *sm = msp->ms_sm;
892	char freebuf[32];
893
894	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf,
895	    sizeof (freebuf));
896
897	(void) printf(
898	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
899	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
900	    (u_longlong_t)space_map_object(sm), freebuf);
901
902	if (dump_opt['m'] > 2 && !dump_opt['L']) {
903		mutex_enter(&msp->ms_lock);
904		metaslab_load_wait(msp);
905		if (!msp->ms_loaded) {
906			VERIFY0(metaslab_load(msp));
907			range_tree_stat_verify(msp->ms_allocatable);
908		}
909		dump_metaslab_stats(msp);
910		metaslab_unload(msp);
911		mutex_exit(&msp->ms_lock);
912	}
913
914	if (dump_opt['m'] > 1 && sm != NULL &&
915	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
916		/*
917		 * The space map histogram represents free space in chunks
918		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
919		 */
920		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
921		    (u_longlong_t)msp->ms_fragmentation);
922		dump_histogram(sm->sm_phys->smp_histogram,
923		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
924	}
925
926	if (dump_opt['d'] > 5 || dump_opt['m'] > 3) {
927		ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
928
929		dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
930	}
931}
932
933static void
934print_vdev_metaslab_header(vdev_t *vd)
935{
936	(void) printf("\tvdev %10llu\n\t%-10s%5llu   %-19s   %-15s   %-10s\n",
937	    (u_longlong_t)vd->vdev_id,
938	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
939	    "offset", "spacemap", "free");
940	(void) printf("\t%15s   %19s   %15s   %10s\n",
941	    "---------------", "-------------------",
942	    "---------------", "-------------");
943}
944
945static void
946dump_metaslab_groups(spa_t *spa)
947{
948	vdev_t *rvd = spa->spa_root_vdev;
949	metaslab_class_t *mc = spa_normal_class(spa);
950	uint64_t fragmentation;
951
952	metaslab_class_histogram_verify(mc);
953
954	for (unsigned c = 0; c < rvd->vdev_children; c++) {
955		vdev_t *tvd = rvd->vdev_child[c];
956		metaslab_group_t *mg = tvd->vdev_mg;
957
958		if (mg->mg_class != mc)
959			continue;
960
961		metaslab_group_histogram_verify(mg);
962		mg->mg_fragmentation = metaslab_group_fragmentation(mg);
963
964		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
965		    "fragmentation",
966		    (u_longlong_t)tvd->vdev_id,
967		    (u_longlong_t)tvd->vdev_ms_count);
968		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
969			(void) printf("%3s\n", "-");
970		} else {
971			(void) printf("%3llu%%\n",
972			    (u_longlong_t)mg->mg_fragmentation);
973		}
974		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
975	}
976
977	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
978	fragmentation = metaslab_class_fragmentation(mc);
979	if (fragmentation == ZFS_FRAG_INVALID)
980		(void) printf("\t%3s\n", "-");
981	else
982		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
983	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
984}
985
986static void
987print_vdev_indirect(vdev_t *vd)
988{
989	vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
990	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
991	vdev_indirect_births_t *vib = vd->vdev_indirect_births;
992
993	if (vim == NULL) {
994		ASSERT3P(vib, ==, NULL);
995		return;
996	}
997
998	ASSERT3U(vdev_indirect_mapping_object(vim), ==,
999	    vic->vic_mapping_object);
1000	ASSERT3U(vdev_indirect_births_object(vib), ==,
1001	    vic->vic_births_object);
1002
1003	(void) printf("indirect births obj %llu:\n",
1004	    (longlong_t)vic->vic_births_object);
1005	(void) printf("    vib_count = %llu\n",
1006	    (longlong_t)vdev_indirect_births_count(vib));
1007	for (uint64_t i = 0; i < vdev_indirect_births_count(vib); i++) {
1008		vdev_indirect_birth_entry_phys_t *cur_vibe =
1009		    &vib->vib_entries[i];
1010		(void) printf("\toffset %llx -> txg %llu\n",
1011		    (longlong_t)cur_vibe->vibe_offset,
1012		    (longlong_t)cur_vibe->vibe_phys_birth_txg);
1013	}
1014	(void) printf("\n");
1015
1016	(void) printf("indirect mapping obj %llu:\n",
1017	    (longlong_t)vic->vic_mapping_object);
1018	(void) printf("    vim_max_offset = 0x%llx\n",
1019	    (longlong_t)vdev_indirect_mapping_max_offset(vim));
1020	(void) printf("    vim_bytes_mapped = 0x%llx\n",
1021	    (longlong_t)vdev_indirect_mapping_bytes_mapped(vim));
1022	(void) printf("    vim_count = %llu\n",
1023	    (longlong_t)vdev_indirect_mapping_num_entries(vim));
1024
1025	if (dump_opt['d'] <= 5 && dump_opt['m'] <= 3)
1026		return;
1027
1028	uint32_t *counts = vdev_indirect_mapping_load_obsolete_counts(vim);
1029
1030	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
1031		vdev_indirect_mapping_entry_phys_t *vimep =
1032		    &vim->vim_entries[i];
1033		(void) printf("\t<%llx:%llx:%llx> -> "
1034		    "<%llx:%llx:%llx> (%x obsolete)\n",
1035		    (longlong_t)vd->vdev_id,
1036		    (longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
1037		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1038		    (longlong_t)DVA_GET_VDEV(&vimep->vimep_dst),
1039		    (longlong_t)DVA_GET_OFFSET(&vimep->vimep_dst),
1040		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1041		    counts[i]);
1042	}
1043	(void) printf("\n");
1044
1045	uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd);
1046	if (obsolete_sm_object != 0) {
1047		objset_t *mos = vd->vdev_spa->spa_meta_objset;
1048		(void) printf("obsolete space map object %llu:\n",
1049		    (u_longlong_t)obsolete_sm_object);
1050		ASSERT(vd->vdev_obsolete_sm != NULL);
1051		ASSERT3U(space_map_object(vd->vdev_obsolete_sm), ==,
1052		    obsolete_sm_object);
1053		dump_spacemap(mos, vd->vdev_obsolete_sm);
1054		(void) printf("\n");
1055	}
1056}
1057
1058static void
1059dump_metaslabs(spa_t *spa)
1060{
1061	vdev_t *vd, *rvd = spa->spa_root_vdev;
1062	uint64_t m, c = 0, children = rvd->vdev_children;
1063
1064	(void) printf("\nMetaslabs:\n");
1065
1066	if (!dump_opt['d'] && zopt_objects > 0) {
1067		c = zopt_object[0];
1068
1069		if (c >= children)
1070			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
1071
1072		if (zopt_objects > 1) {
1073			vd = rvd->vdev_child[c];
1074			print_vdev_metaslab_header(vd);
1075
1076			for (m = 1; m < zopt_objects; m++) {
1077				if (zopt_object[m] < vd->vdev_ms_count)
1078					dump_metaslab(
1079					    vd->vdev_ms[zopt_object[m]]);
1080				else
1081					(void) fprintf(stderr, "bad metaslab "
1082					    "number %llu\n",
1083					    (u_longlong_t)zopt_object[m]);
1084			}
1085			(void) printf("\n");
1086			return;
1087		}
1088		children = c + 1;
1089	}
1090	for (; c < children; c++) {
1091		vd = rvd->vdev_child[c];
1092		print_vdev_metaslab_header(vd);
1093
1094		print_vdev_indirect(vd);
1095
1096		for (m = 0; m < vd->vdev_ms_count; m++)
1097			dump_metaslab(vd->vdev_ms[m]);
1098		(void) printf("\n");
1099	}
1100}
1101
1102static void
1103dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
1104{
1105	const ddt_phys_t *ddp = dde->dde_phys;
1106	const ddt_key_t *ddk = &dde->dde_key;
1107	const char *types[4] = { "ditto", "single", "double", "triple" };
1108	char blkbuf[BP_SPRINTF_LEN];
1109	blkptr_t blk;
1110
1111	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
1112		if (ddp->ddp_phys_birth == 0)
1113			continue;
1114		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
1115		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
1116		(void) printf("index %llx refcnt %llu %s %s\n",
1117		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
1118		    types[p], blkbuf);
1119	}
1120}
1121
1122static void
1123dump_dedup_ratio(const ddt_stat_t *dds)
1124{
1125	double rL, rP, rD, D, dedup, compress, copies;
1126
1127	if (dds->dds_blocks == 0)
1128		return;
1129
1130	rL = (double)dds->dds_ref_lsize;
1131	rP = (double)dds->dds_ref_psize;
1132	rD = (double)dds->dds_ref_dsize;
1133	D = (double)dds->dds_dsize;
1134
1135	dedup = rD / D;
1136	compress = rL / rP;
1137	copies = rD / rP;
1138
1139	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
1140	    "dedup * compress / copies = %.2f\n\n",
1141	    dedup, compress, copies, dedup * compress / copies);
1142}
1143
1144static void
1145dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
1146{
1147	char name[DDT_NAMELEN];
1148	ddt_entry_t dde;
1149	uint64_t walk = 0;
1150	dmu_object_info_t doi;
1151	uint64_t count, dspace, mspace;
1152	int error;
1153
1154	error = ddt_object_info(ddt, type, class, &doi);
1155
1156	if (error == ENOENT)
1157		return;
1158	ASSERT(error == 0);
1159
1160	if ((count = ddt_object_count(ddt, type, class)) == 0)
1161		return;
1162
1163	dspace = doi.doi_physical_blocks_512 << 9;
1164	mspace = doi.doi_fill_count * doi.doi_data_block_size;
1165
1166	ddt_object_name(ddt, type, class, name);
1167
1168	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
1169	    name,
1170	    (u_longlong_t)count,
1171	    (u_longlong_t)(dspace / count),
1172	    (u_longlong_t)(mspace / count));
1173
1174	if (dump_opt['D'] < 3)
1175		return;
1176
1177	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
1178
1179	if (dump_opt['D'] < 4)
1180		return;
1181
1182	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
1183		return;
1184
1185	(void) printf("%s contents:\n\n", name);
1186
1187	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
1188		dump_dde(ddt, &dde, walk);
1189
1190	ASSERT3U(error, ==, ENOENT);
1191
1192	(void) printf("\n");
1193}
1194
1195static void
1196dump_all_ddts(spa_t *spa)
1197{
1198	ddt_histogram_t ddh_total;
1199	ddt_stat_t dds_total;
1200
1201	bzero(&ddh_total, sizeof (ddh_total));
1202	bzero(&dds_total, sizeof (dds_total));
1203
1204	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
1205		ddt_t *ddt = spa->spa_ddt[c];
1206		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
1207			for (enum ddt_class class = 0; class < DDT_CLASSES;
1208			    class++) {
1209				dump_ddt(ddt, type, class);
1210			}
1211		}
1212	}
1213
1214	ddt_get_dedup_stats(spa, &dds_total);
1215
1216	if (dds_total.dds_blocks == 0) {
1217		(void) printf("All DDTs are empty\n");
1218		return;
1219	}
1220
1221	(void) printf("\n");
1222
1223	if (dump_opt['D'] > 1) {
1224		(void) printf("DDT histogram (aggregated over all DDTs):\n");
1225		ddt_get_dedup_histogram(spa, &ddh_total);
1226		zpool_dump_ddt(&dds_total, &ddh_total);
1227	}
1228
1229	dump_dedup_ratio(&dds_total);
1230}
1231
1232static void
1233dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1234{
1235	char *prefix = arg;
1236
1237	(void) printf("%s [%llu,%llu) length %llu\n",
1238	    prefix,
1239	    (u_longlong_t)start,
1240	    (u_longlong_t)(start + size),
1241	    (u_longlong_t)(size));
1242}
1243
1244static void
1245dump_dtl(vdev_t *vd, int indent)
1246{
1247	spa_t *spa = vd->vdev_spa;
1248	boolean_t required;
1249	const char *name[DTL_TYPES] = { "missing", "partial", "scrub",
1250		"outage" };
1251	char prefix[256];
1252
1253	spa_vdev_state_enter(spa, SCL_NONE);
1254	required = vdev_dtl_required(vd);
1255	(void) spa_vdev_state_exit(spa, NULL, 0);
1256
1257	if (indent == 0)
1258		(void) printf("\nDirty time logs:\n\n");
1259
1260	(void) printf("\t%*s%s [%s]\n", indent, "",
1261	    vd->vdev_path ? vd->vdev_path :
1262	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1263	    required ? "DTL-required" : "DTL-expendable");
1264
1265	for (int t = 0; t < DTL_TYPES; t++) {
1266		range_tree_t *rt = vd->vdev_dtl[t];
1267		if (range_tree_space(rt) == 0)
1268			continue;
1269		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1270		    indent + 2, "", name[t]);
1271		range_tree_walk(rt, dump_dtl_seg, prefix);
1272		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1273			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1274	}
1275
1276	for (unsigned c = 0; c < vd->vdev_children; c++)
1277		dump_dtl(vd->vdev_child[c], indent + 4);
1278}
1279
1280static void
1281dump_history(spa_t *spa)
1282{
1283	nvlist_t **events = NULL;
1284	uint64_t resid, len, off = 0;
1285	uint_t num = 0;
1286	int error;
1287	time_t tsec;
1288	struct tm t;
1289	char tbuf[30];
1290	char internalstr[MAXPATHLEN];
1291
1292	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
1293	do {
1294		len = SPA_MAXBLOCKSIZE;
1295
1296		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1297			(void) fprintf(stderr, "Unable to read history: "
1298			    "error %d\n", error);
1299			umem_free(buf, SPA_MAXBLOCKSIZE);
1300			return;
1301		}
1302
1303		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1304			break;
1305
1306		off -= resid;
1307	} while (len != 0);
1308	umem_free(buf, SPA_MAXBLOCKSIZE);
1309
1310	(void) printf("\nHistory:\n");
1311	for (unsigned i = 0; i < num; i++) {
1312		uint64_t time, txg, ievent;
1313		char *cmd, *intstr;
1314		boolean_t printed = B_FALSE;
1315
1316		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1317		    &time) != 0)
1318			goto next;
1319		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1320		    &cmd) != 0) {
1321			if (nvlist_lookup_uint64(events[i],
1322			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1323				goto next;
1324			verify(nvlist_lookup_uint64(events[i],
1325			    ZPOOL_HIST_TXG, &txg) == 0);
1326			verify(nvlist_lookup_string(events[i],
1327			    ZPOOL_HIST_INT_STR, &intstr) == 0);
1328			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1329				goto next;
1330
1331			(void) snprintf(internalstr,
1332			    sizeof (internalstr),
1333			    "[internal %s txg:%ju] %s",
1334			    zfs_history_event_names[ievent], (uintmax_t)txg,
1335			    intstr);
1336			cmd = internalstr;
1337		}
1338		tsec = time;
1339		(void) localtime_r(&tsec, &t);
1340		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1341		(void) printf("%s %s\n", tbuf, cmd);
1342		printed = B_TRUE;
1343
1344next:
1345		if (dump_opt['h'] > 1) {
1346			if (!printed)
1347				(void) printf("unrecognized record:\n");
1348			dump_nvlist(events[i], 2);
1349		}
1350	}
1351}
1352
1353/*ARGSUSED*/
1354static void
1355dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1356{
1357}
1358
1359static uint64_t
1360blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1361    const zbookmark_phys_t *zb)
1362{
1363	if (dnp == NULL) {
1364		ASSERT(zb->zb_level < 0);
1365		if (zb->zb_object == 0)
1366			return (zb->zb_blkid);
1367		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1368	}
1369
1370	ASSERT(zb->zb_level >= 0);
1371
1372	return ((zb->zb_blkid <<
1373	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1374	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1375}
1376
1377static void
1378snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1379{
1380	const dva_t *dva = bp->blk_dva;
1381	int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1382
1383	if (dump_opt['b'] >= 6) {
1384		snprintf_blkptr(blkbuf, buflen, bp);
1385		return;
1386	}
1387
1388	if (BP_IS_EMBEDDED(bp)) {
1389		(void) sprintf(blkbuf,
1390		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
1391		    (int)BPE_GET_ETYPE(bp),
1392		    (u_longlong_t)BPE_GET_LSIZE(bp),
1393		    (u_longlong_t)BPE_GET_PSIZE(bp),
1394		    (u_longlong_t)bp->blk_birth);
1395		return;
1396	}
1397
1398	blkbuf[0] = '\0';
1399	for (int i = 0; i < ndvas; i++)
1400		(void) snprintf(blkbuf + strlen(blkbuf),
1401		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1402		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1403		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1404		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1405
1406	if (BP_IS_HOLE(bp)) {
1407		(void) snprintf(blkbuf + strlen(blkbuf),
1408		    buflen - strlen(blkbuf),
1409		    "%llxL B=%llu",
1410		    (u_longlong_t)BP_GET_LSIZE(bp),
1411		    (u_longlong_t)bp->blk_birth);
1412	} else {
1413		(void) snprintf(blkbuf + strlen(blkbuf),
1414		    buflen - strlen(blkbuf),
1415		    "%llxL/%llxP F=%llu B=%llu/%llu",
1416		    (u_longlong_t)BP_GET_LSIZE(bp),
1417		    (u_longlong_t)BP_GET_PSIZE(bp),
1418		    (u_longlong_t)BP_GET_FILL(bp),
1419		    (u_longlong_t)bp->blk_birth,
1420		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1421	}
1422}
1423
1424static void
1425print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1426    const dnode_phys_t *dnp)
1427{
1428	char blkbuf[BP_SPRINTF_LEN];
1429	int l;
1430
1431	if (!BP_IS_EMBEDDED(bp)) {
1432		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1433		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1434	}
1435
1436	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1437
1438	ASSERT(zb->zb_level >= 0);
1439
1440	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1441		if (l == zb->zb_level) {
1442			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1443		} else {
1444			(void) printf(" ");
1445		}
1446	}
1447
1448	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1449	(void) printf("%s\n", blkbuf);
1450}
1451
1452static int
1453visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1454    blkptr_t *bp, const zbookmark_phys_t *zb)
1455{
1456	int err = 0;
1457
1458	if (bp->blk_birth == 0)
1459		return (0);
1460
1461	print_indirect(bp, zb, dnp);
1462
1463	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1464		arc_flags_t flags = ARC_FLAG_WAIT;
1465		int i;
1466		blkptr_t *cbp;
1467		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1468		arc_buf_t *buf;
1469		uint64_t fill = 0;
1470
1471		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1472		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1473		if (err)
1474			return (err);
1475		ASSERT(buf->b_data);
1476
1477		/* recursively visit blocks below this */
1478		cbp = buf->b_data;
1479		for (i = 0; i < epb; i++, cbp++) {
1480			zbookmark_phys_t czb;
1481
1482			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1483			    zb->zb_level - 1,
1484			    zb->zb_blkid * epb + i);
1485			err = visit_indirect(spa, dnp, cbp, &czb);
1486			if (err)
1487				break;
1488			fill += BP_GET_FILL(cbp);
1489		}
1490		if (!err)
1491			ASSERT3U(fill, ==, BP_GET_FILL(bp));
1492		arc_buf_destroy(buf, &buf);
1493	}
1494
1495	return (err);
1496}
1497
1498/*ARGSUSED*/
1499static void
1500dump_indirect(dnode_t *dn)
1501{
1502	dnode_phys_t *dnp = dn->dn_phys;
1503	int j;
1504	zbookmark_phys_t czb;
1505
1506	(void) printf("Indirect blocks:\n");
1507
1508	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1509	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1510	for (j = 0; j < dnp->dn_nblkptr; j++) {
1511		czb.zb_blkid = j;
1512		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1513		    &dnp->dn_blkptr[j], &czb);
1514	}
1515
1516	(void) printf("\n");
1517}
1518
1519/*ARGSUSED*/
1520static void
1521dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1522{
1523	dsl_dir_phys_t *dd = data;
1524	time_t crtime;
1525	char nice[32];
1526
1527	/* make sure nicenum has enough space */
1528	CTASSERT(sizeof (nice) >= NN_NUMBUF_SZ);
1529
1530	if (dd == NULL)
1531		return;
1532
1533	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1534
1535	crtime = dd->dd_creation_time;
1536	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1537	(void) printf("\t\thead_dataset_obj = %llu\n",
1538	    (u_longlong_t)dd->dd_head_dataset_obj);
1539	(void) printf("\t\tparent_dir_obj = %llu\n",
1540	    (u_longlong_t)dd->dd_parent_obj);
1541	(void) printf("\t\torigin_obj = %llu\n",
1542	    (u_longlong_t)dd->dd_origin_obj);
1543	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1544	    (u_longlong_t)dd->dd_child_dir_zapobj);
1545	zdb_nicenum(dd->dd_used_bytes, nice, sizeof (nice));
1546	(void) printf("\t\tused_bytes = %s\n", nice);
1547	zdb_nicenum(dd->dd_compressed_bytes, nice, sizeof (nice));
1548	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1549	zdb_nicenum(dd->dd_uncompressed_bytes, nice, sizeof (nice));
1550	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1551	zdb_nicenum(dd->dd_quota, nice, sizeof (nice));
1552	(void) printf("\t\tquota = %s\n", nice);
1553	zdb_nicenum(dd->dd_reserved, nice, sizeof (nice));
1554	(void) printf("\t\treserved = %s\n", nice);
1555	(void) printf("\t\tprops_zapobj = %llu\n",
1556	    (u_longlong_t)dd->dd_props_zapobj);
1557	(void) printf("\t\tdeleg_zapobj = %llu\n",
1558	    (u_longlong_t)dd->dd_deleg_zapobj);
1559	(void) printf("\t\tflags = %llx\n",
1560	    (u_longlong_t)dd->dd_flags);
1561
1562#define	DO(which) \
1563	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice, \
1564	    sizeof (nice)); \
1565	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1566	DO(HEAD);
1567	DO(SNAP);
1568	DO(CHILD);
1569	DO(CHILD_RSRV);
1570	DO(REFRSRV);
1571#undef DO
1572	(void) printf("\t\tclones = %llu\n",
1573	    (u_longlong_t)dd->dd_clones);
1574}
1575
1576/*ARGSUSED*/
1577static void
1578dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1579{
1580	dsl_dataset_phys_t *ds = data;
1581	time_t crtime;
1582	char used[32], compressed[32], uncompressed[32], unique[32];
1583	char blkbuf[BP_SPRINTF_LEN];
1584
1585	/* make sure nicenum has enough space */
1586	CTASSERT(sizeof (used) >= NN_NUMBUF_SZ);
1587	CTASSERT(sizeof (compressed) >= NN_NUMBUF_SZ);
1588	CTASSERT(sizeof (uncompressed) >= NN_NUMBUF_SZ);
1589	CTASSERT(sizeof (unique) >= NN_NUMBUF_SZ);
1590
1591	if (ds == NULL)
1592		return;
1593
1594	ASSERT(size == sizeof (*ds));
1595	crtime = ds->ds_creation_time;
1596	zdb_nicenum(ds->ds_referenced_bytes, used, sizeof (used));
1597	zdb_nicenum(ds->ds_compressed_bytes, compressed, sizeof (compressed));
1598	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed,
1599	    sizeof (uncompressed));
1600	zdb_nicenum(ds->ds_unique_bytes, unique, sizeof (unique));
1601	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1602
1603	(void) printf("\t\tdir_obj = %llu\n",
1604	    (u_longlong_t)ds->ds_dir_obj);
1605	(void) printf("\t\tprev_snap_obj = %llu\n",
1606	    (u_longlong_t)ds->ds_prev_snap_obj);
1607	(void) printf("\t\tprev_snap_txg = %llu\n",
1608	    (u_longlong_t)ds->ds_prev_snap_txg);
1609	(void) printf("\t\tnext_snap_obj = %llu\n",
1610	    (u_longlong_t)ds->ds_next_snap_obj);
1611	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1612	    (u_longlong_t)ds->ds_snapnames_zapobj);
1613	(void) printf("\t\tnum_children = %llu\n",
1614	    (u_longlong_t)ds->ds_num_children);
1615	(void) printf("\t\tuserrefs_obj = %llu\n",
1616	    (u_longlong_t)ds->ds_userrefs_obj);
1617	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1618	(void) printf("\t\tcreation_txg = %llu\n",
1619	    (u_longlong_t)ds->ds_creation_txg);
1620	(void) printf("\t\tdeadlist_obj = %llu\n",
1621	    (u_longlong_t)ds->ds_deadlist_obj);
1622	(void) printf("\t\tused_bytes = %s\n", used);
1623	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1624	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1625	(void) printf("\t\tunique = %s\n", unique);
1626	(void) printf("\t\tfsid_guid = %llu\n",
1627	    (u_longlong_t)ds->ds_fsid_guid);
1628	(void) printf("\t\tguid = %llu\n",
1629	    (u_longlong_t)ds->ds_guid);
1630	(void) printf("\t\tflags = %llx\n",
1631	    (u_longlong_t)ds->ds_flags);
1632	(void) printf("\t\tnext_clones_obj = %llu\n",
1633	    (u_longlong_t)ds->ds_next_clones_obj);
1634	(void) printf("\t\tprops_obj = %llu\n",
1635	    (u_longlong_t)ds->ds_props_obj);
1636	(void) printf("\t\tbp = %s\n", blkbuf);
1637}
1638
1639/* ARGSUSED */
1640static int
1641dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1642{
1643	char blkbuf[BP_SPRINTF_LEN];
1644
1645	if (bp->blk_birth != 0) {
1646		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1647		(void) printf("\t%s\n", blkbuf);
1648	}
1649	return (0);
1650}
1651
1652static void
1653dump_bptree(objset_t *os, uint64_t obj, const char *name)
1654{
1655	char bytes[32];
1656	bptree_phys_t *bt;
1657	dmu_buf_t *db;
1658
1659	/* make sure nicenum has enough space */
1660	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1661
1662	if (dump_opt['d'] < 3)
1663		return;
1664
1665	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1666	bt = db->db_data;
1667	zdb_nicenum(bt->bt_bytes, bytes, sizeof (bytes));
1668	(void) printf("\n    %s: %llu datasets, %s\n",
1669	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1670	dmu_buf_rele(db, FTAG);
1671
1672	if (dump_opt['d'] < 5)
1673		return;
1674
1675	(void) printf("\n");
1676
1677	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1678}
1679
1680/* ARGSUSED */
1681static int
1682dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1683{
1684	char blkbuf[BP_SPRINTF_LEN];
1685
1686	ASSERT(bp->blk_birth != 0);
1687	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1688	(void) printf("\t%s\n", blkbuf);
1689	return (0);
1690}
1691
1692static void
1693dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
1694{
1695	char bytes[32];
1696	char comp[32];
1697	char uncomp[32];
1698
1699	/* make sure nicenum has enough space */
1700	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1701	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1702	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1703
1704	if (dump_opt['d'] < 3)
1705		return;
1706
1707	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes, sizeof (bytes));
1708	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1709		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp, sizeof (comp));
1710		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp, sizeof (uncomp));
1711		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1712		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1713		    indent * 8, name,
1714		    (u_longlong_t)bpo->bpo_object,
1715		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1716		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1717		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1718		    bytes, comp, uncomp);
1719
1720		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1721			uint64_t subobj;
1722			bpobj_t subbpo;
1723			int error;
1724			VERIFY0(dmu_read(bpo->bpo_os,
1725			    bpo->bpo_phys->bpo_subobjs,
1726			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1727			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1728			if (error != 0) {
1729				(void) printf("ERROR %u while trying to open "
1730				    "subobj id %llu\n",
1731				    error, (u_longlong_t)subobj);
1732				continue;
1733			}
1734			dump_full_bpobj(&subbpo, "subobj", indent + 1);
1735			bpobj_close(&subbpo);
1736		}
1737	} else {
1738		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1739		    indent * 8, name,
1740		    (u_longlong_t)bpo->bpo_object,
1741		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1742		    bytes);
1743	}
1744
1745	if (dump_opt['d'] < 5)
1746		return;
1747
1748
1749	if (indent == 0) {
1750		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1751		(void) printf("\n");
1752	}
1753}
1754
1755static void
1756bpobj_count_refd(bpobj_t *bpo)
1757{
1758	mos_obj_refd(bpo->bpo_object);
1759
1760	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1761		mos_obj_refd(bpo->bpo_phys->bpo_subobjs);
1762		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1763			uint64_t subobj;
1764			bpobj_t subbpo;
1765			int error;
1766			VERIFY0(dmu_read(bpo->bpo_os,
1767			    bpo->bpo_phys->bpo_subobjs,
1768			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1769			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1770			if (error != 0) {
1771				(void) printf("ERROR %u while trying to open "
1772				    "subobj id %llu\n",
1773				    error, (u_longlong_t)subobj);
1774				continue;
1775			}
1776			bpobj_count_refd(&subbpo);
1777			bpobj_close(&subbpo);
1778		}
1779	}
1780}
1781
1782static void
1783dump_deadlist(dsl_deadlist_t *dl)
1784{
1785	dsl_deadlist_entry_t *dle;
1786	uint64_t unused;
1787	char bytes[32];
1788	char comp[32];
1789	char uncomp[32];
1790	uint64_t empty_bpobj =
1791	    dmu_objset_spa(dl->dl_os)->spa_dsl_pool->dp_empty_bpobj;
1792
1793	/* force the tree to be loaded */
1794	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1795
1796	if (dl->dl_oldfmt) {
1797		if (dl->dl_bpobj.bpo_object != empty_bpobj)
1798			bpobj_count_refd(&dl->dl_bpobj);
1799	} else {
1800		mos_obj_refd(dl->dl_object);
1801		for (dle = avl_first(&dl->dl_tree); dle;
1802		    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1803			if (dle->dle_bpobj.bpo_object != empty_bpobj)
1804				bpobj_count_refd(&dle->dle_bpobj);
1805		}
1806	}
1807
1808	/* make sure nicenum has enough space */
1809	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1810	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1811	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1812
1813	if (dump_opt['d'] < 3)
1814		return;
1815
1816	if (dl->dl_oldfmt) {
1817		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1818		return;
1819	}
1820
1821	zdb_nicenum(dl->dl_phys->dl_used, bytes, sizeof (bytes));
1822	zdb_nicenum(dl->dl_phys->dl_comp, comp, sizeof (comp));
1823	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp, sizeof (uncomp));
1824	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1825	    bytes, comp, uncomp);
1826
1827	if (dump_opt['d'] < 4)
1828		return;
1829
1830	(void) printf("\n");
1831
1832	for (dle = avl_first(&dl->dl_tree); dle;
1833	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1834		if (dump_opt['d'] >= 5) {
1835			char buf[128];
1836			(void) snprintf(buf, sizeof (buf),
1837			    "mintxg %llu -> obj %llu",
1838			    (longlong_t)dle->dle_mintxg,
1839			    (longlong_t)dle->dle_bpobj.bpo_object);
1840
1841			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1842		} else {
1843			(void) printf("mintxg %llu -> obj %llu\n",
1844			    (longlong_t)dle->dle_mintxg,
1845			    (longlong_t)dle->dle_bpobj.bpo_object);
1846		}
1847	}
1848}
1849
1850static avl_tree_t idx_tree;
1851static avl_tree_t domain_tree;
1852static boolean_t fuid_table_loaded;
1853static objset_t *sa_os = NULL;
1854static sa_attr_type_t *sa_attr_table = NULL;
1855
1856static int
1857open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
1858{
1859	int err;
1860	uint64_t sa_attrs = 0;
1861	uint64_t version = 0;
1862
1863	VERIFY3P(sa_os, ==, NULL);
1864	err = dmu_objset_own(path, type, B_TRUE, tag, osp);
1865	if (err != 0) {
1866		(void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
1867		    strerror(err));
1868		return (err);
1869	}
1870
1871	if (dmu_objset_type(*osp) == DMU_OST_ZFS) {
1872		(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1873		    8, 1, &version);
1874		if (version >= ZPL_VERSION_SA) {
1875			(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1876			    8, 1, &sa_attrs);
1877		}
1878		err = sa_setup(*osp, sa_attrs, zfs_attr_table, ZPL_END,
1879		    &sa_attr_table);
1880		if (err != 0) {
1881			(void) fprintf(stderr, "sa_setup failed: %s\n",
1882			    strerror(err));
1883			dmu_objset_disown(*osp, tag);
1884			*osp = NULL;
1885		}
1886	}
1887	sa_os = *osp;
1888
1889	return (0);
1890}
1891
1892static void
1893close_objset(objset_t *os, void *tag)
1894{
1895	VERIFY3P(os, ==, sa_os);
1896	if (os->os_sa != NULL)
1897		sa_tear_down(os);
1898	dmu_objset_disown(os, tag);
1899	sa_attr_table = NULL;
1900	sa_os = NULL;
1901}
1902
1903static void
1904fuid_table_destroy()
1905{
1906	if (fuid_table_loaded) {
1907		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1908		fuid_table_loaded = B_FALSE;
1909	}
1910}
1911
1912/*
1913 * print uid or gid information.
1914 * For normal POSIX id just the id is printed in decimal format.
1915 * For CIFS files with FUID the fuid is printed in hex followed by
1916 * the domain-rid string.
1917 */
1918static void
1919print_idstr(uint64_t id, const char *id_type)
1920{
1921	if (FUID_INDEX(id)) {
1922		char *domain;
1923
1924		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1925		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1926		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1927	} else {
1928		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1929	}
1930
1931}
1932
1933static void
1934dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1935{
1936	uint32_t uid_idx, gid_idx;
1937
1938	uid_idx = FUID_INDEX(uid);
1939	gid_idx = FUID_INDEX(gid);
1940
1941	/* Load domain table, if not already loaded */
1942	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1943		uint64_t fuid_obj;
1944
1945		/* first find the fuid object.  It lives in the master node */
1946		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1947		    8, 1, &fuid_obj) == 0);
1948		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1949		(void) zfs_fuid_table_load(os, fuid_obj,
1950		    &idx_tree, &domain_tree);
1951		fuid_table_loaded = B_TRUE;
1952	}
1953
1954	print_idstr(uid, "uid");
1955	print_idstr(gid, "gid");
1956}
1957
1958/*ARGSUSED*/
1959static void
1960dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1961{
1962	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
1963	sa_handle_t *hdl;
1964	uint64_t xattr, rdev, gen;
1965	uint64_t uid, gid, mode, fsize, parent, links;
1966	uint64_t pflags;
1967	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1968	time_t z_crtime, z_atime, z_mtime, z_ctime;
1969	sa_bulk_attr_t bulk[12];
1970	int idx = 0;
1971	int error;
1972
1973	VERIFY3P(os, ==, sa_os);
1974	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1975		(void) printf("Failed to get handle for SA znode\n");
1976		return;
1977	}
1978
1979	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1980	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1981	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1982	    &links, 8);
1983	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1984	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1985	    &mode, 8);
1986	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1987	    NULL, &parent, 8);
1988	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
1989	    &fsize, 8);
1990	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
1991	    acctm, 16);
1992	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
1993	    modtm, 16);
1994	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
1995	    crtm, 16);
1996	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
1997	    chgtm, 16);
1998	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
1999	    &pflags, 8);
2000
2001	if (sa_bulk_lookup(hdl, bulk, idx)) {
2002		(void) sa_handle_destroy(hdl);
2003		return;
2004	}
2005
2006	z_crtime = (time_t)crtm[0];
2007	z_atime = (time_t)acctm[0];
2008	z_mtime = (time_t)modtm[0];
2009	z_ctime = (time_t)chgtm[0];
2010
2011	if (dump_opt['d'] > 4) {
2012		error = zfs_obj_to_path(os, object, path, sizeof (path));
2013		if (error == ESTALE) {
2014			(void) snprintf(path, sizeof (path), "on delete queue");
2015		} else if (error != 0) {
2016			leaked_objects++;
2017			(void) snprintf(path, sizeof (path),
2018			    "path not found, possibly leaked");
2019		}
2020		(void) printf("\tpath	%s\n", path);
2021	}
2022	dump_uidgid(os, uid, gid);
2023	(void) printf("\tatime	%s", ctime(&z_atime));
2024	(void) printf("\tmtime	%s", ctime(&z_mtime));
2025	(void) printf("\tctime	%s", ctime(&z_ctime));
2026	(void) printf("\tcrtime	%s", ctime(&z_crtime));
2027	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
2028	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
2029	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
2030	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
2031	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
2032	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
2033	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
2034	    sizeof (uint64_t)) == 0)
2035		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
2036	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
2037	    sizeof (uint64_t)) == 0)
2038		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
2039	sa_handle_destroy(hdl);
2040}
2041
2042/*ARGSUSED*/
2043static void
2044dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
2045{
2046}
2047
2048/*ARGSUSED*/
2049static void
2050dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
2051{
2052}
2053
2054static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
2055	dump_none,		/* unallocated			*/
2056	dump_zap,		/* object directory		*/
2057	dump_uint64,		/* object array			*/
2058	dump_none,		/* packed nvlist		*/
2059	dump_packed_nvlist,	/* packed nvlist size		*/
2060	dump_none,		/* bpobj			*/
2061	dump_bpobj,		/* bpobj header			*/
2062	dump_none,		/* SPA space map header		*/
2063	dump_none,		/* SPA space map		*/
2064	dump_none,		/* ZIL intent log		*/
2065	dump_dnode,		/* DMU dnode			*/
2066	dump_dmu_objset,	/* DMU objset			*/
2067	dump_dsl_dir,		/* DSL directory		*/
2068	dump_zap,		/* DSL directory child map	*/
2069	dump_zap,		/* DSL dataset snap map		*/
2070	dump_zap,		/* DSL props			*/
2071	dump_dsl_dataset,	/* DSL dataset			*/
2072	dump_znode,		/* ZFS znode			*/
2073	dump_acl,		/* ZFS V0 ACL			*/
2074	dump_uint8,		/* ZFS plain file		*/
2075	dump_zpldir,		/* ZFS directory		*/
2076	dump_zap,		/* ZFS master node		*/
2077	dump_zap,		/* ZFS delete queue		*/
2078	dump_uint8,		/* zvol object			*/
2079	dump_zap,		/* zvol prop			*/
2080	dump_uint8,		/* other uint8[]		*/
2081	dump_uint64,		/* other uint64[]		*/
2082	dump_zap,		/* other ZAP			*/
2083	dump_zap,		/* persistent error log		*/
2084	dump_uint8,		/* SPA history			*/
2085	dump_history_offsets,	/* SPA history offsets		*/
2086	dump_zap,		/* Pool properties		*/
2087	dump_zap,		/* DSL permissions		*/
2088	dump_acl,		/* ZFS ACL			*/
2089	dump_uint8,		/* ZFS SYSACL			*/
2090	dump_none,		/* FUID nvlist			*/
2091	dump_packed_nvlist,	/* FUID nvlist size		*/
2092	dump_zap,		/* DSL dataset next clones	*/
2093	dump_zap,		/* DSL scrub queue		*/
2094	dump_zap,		/* ZFS user/group used		*/
2095	dump_zap,		/* ZFS user/group quota		*/
2096	dump_zap,		/* snapshot refcount tags	*/
2097	dump_ddt_zap,		/* DDT ZAP object		*/
2098	dump_zap,		/* DDT statistics		*/
2099	dump_znode,		/* SA object			*/
2100	dump_zap,		/* SA Master Node		*/
2101	dump_sa_attrs,		/* SA attribute registration	*/
2102	dump_sa_layouts,	/* SA attribute layouts		*/
2103	dump_zap,		/* DSL scrub translations	*/
2104	dump_none,		/* fake dedup BP		*/
2105	dump_zap,		/* deadlist			*/
2106	dump_none,		/* deadlist hdr			*/
2107	dump_zap,		/* dsl clones			*/
2108	dump_bpobj_subobjs,	/* bpobj subobjs		*/
2109	dump_unknown,		/* Unknown type, must be last	*/
2110};
2111
2112static void
2113dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
2114{
2115	dmu_buf_t *db = NULL;
2116	dmu_object_info_t doi;
2117	dnode_t *dn;
2118	void *bonus = NULL;
2119	size_t bsize = 0;
2120	char iblk[32], dblk[32], lsize[32], asize[32], fill[32];
2121	char bonus_size[32];
2122	char aux[50];
2123	int error;
2124
2125	/* make sure nicenum has enough space */
2126	CTASSERT(sizeof (iblk) >= NN_NUMBUF_SZ);
2127	CTASSERT(sizeof (dblk) >= NN_NUMBUF_SZ);
2128	CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
2129	CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
2130	CTASSERT(sizeof (bonus_size) >= NN_NUMBUF_SZ);
2131
2132	if (*print_header) {
2133		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
2134		    "Object", "lvl", "iblk", "dblk", "dsize", "lsize",
2135		    "%full", "type");
2136		*print_header = 0;
2137	}
2138
2139	if (object == 0) {
2140		dn = DMU_META_DNODE(os);
2141	} else {
2142		error = dmu_bonus_hold(os, object, FTAG, &db);
2143		if (error)
2144			fatal("dmu_bonus_hold(%llu) failed, errno %u",
2145			    object, error);
2146		bonus = db->db_data;
2147		bsize = db->db_size;
2148		dn = DB_DNODE((dmu_buf_impl_t *)db);
2149	}
2150	dmu_object_info_from_dnode(dn, &doi);
2151
2152	zdb_nicenum(doi.doi_metadata_block_size, iblk, sizeof (iblk));
2153	zdb_nicenum(doi.doi_data_block_size, dblk, sizeof (dblk));
2154	zdb_nicenum(doi.doi_max_offset, lsize, sizeof (lsize));
2155	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize, sizeof (asize));
2156	zdb_nicenum(doi.doi_bonus_size, bonus_size, sizeof (bonus_size));
2157	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
2158	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
2159	    doi.doi_max_offset);
2160
2161	aux[0] = '\0';
2162
2163	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
2164		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
2165		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
2166	}
2167
2168	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
2169		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
2170		    ZDB_COMPRESS_NAME(doi.doi_compress));
2171	}
2172
2173	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %6s  %s%s\n",
2174	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk,
2175	    asize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
2176
2177	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
2178		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
2179		    "", "", "", "", "", bonus_size, "bonus",
2180		    ZDB_OT_NAME(doi.doi_bonus_type));
2181	}
2182
2183	if (verbosity >= 4) {
2184		(void) printf("\tdnode flags: %s%s%s\n",
2185		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
2186		    "USED_BYTES " : "",
2187		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
2188		    "USERUSED_ACCOUNTED " : "",
2189		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
2190		    "SPILL_BLKPTR" : "");
2191		(void) printf("\tdnode maxblkid: %llu\n",
2192		    (longlong_t)dn->dn_phys->dn_maxblkid);
2193
2194		object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
2195		    bonus, bsize);
2196		object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
2197		*print_header = 1;
2198	}
2199
2200	if (verbosity >= 5)
2201		dump_indirect(dn);
2202
2203	if (verbosity >= 5) {
2204		/*
2205		 * Report the list of segments that comprise the object.
2206		 */
2207		uint64_t start = 0;
2208		uint64_t end;
2209		uint64_t blkfill = 1;
2210		int minlvl = 1;
2211
2212		if (dn->dn_type == DMU_OT_DNODE) {
2213			minlvl = 0;
2214			blkfill = DNODES_PER_BLOCK;
2215		}
2216
2217		for (;;) {
2218			char segsize[32];
2219			/* make sure nicenum has enough space */
2220			CTASSERT(sizeof (segsize) >= NN_NUMBUF_SZ);
2221			error = dnode_next_offset(dn,
2222			    0, &start, minlvl, blkfill, 0);
2223			if (error)
2224				break;
2225			end = start;
2226			error = dnode_next_offset(dn,
2227			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
2228			zdb_nicenum(end - start, segsize, sizeof (segsize));
2229			(void) printf("\t\tsegment [%016llx, %016llx)"
2230			    " size %5s\n", (u_longlong_t)start,
2231			    (u_longlong_t)end, segsize);
2232			if (error)
2233				break;
2234			start = end;
2235		}
2236	}
2237
2238	if (db != NULL)
2239		dmu_buf_rele(db, FTAG);
2240}
2241
2242static void
2243count_dir_mos_objects(dsl_dir_t *dd)
2244{
2245	mos_obj_refd(dd->dd_object);
2246	mos_obj_refd(dsl_dir_phys(dd)->dd_child_dir_zapobj);
2247	mos_obj_refd(dsl_dir_phys(dd)->dd_deleg_zapobj);
2248	mos_obj_refd(dsl_dir_phys(dd)->dd_props_zapobj);
2249	mos_obj_refd(dsl_dir_phys(dd)->dd_clones);
2250}
2251
2252static void
2253count_ds_mos_objects(dsl_dataset_t *ds)
2254{
2255	mos_obj_refd(ds->ds_object);
2256	mos_obj_refd(dsl_dataset_phys(ds)->ds_next_clones_obj);
2257	mos_obj_refd(dsl_dataset_phys(ds)->ds_props_obj);
2258	mos_obj_refd(dsl_dataset_phys(ds)->ds_userrefs_obj);
2259	mos_obj_refd(dsl_dataset_phys(ds)->ds_snapnames_zapobj);
2260
2261	if (!dsl_dataset_is_snapshot(ds)) {
2262		count_dir_mos_objects(ds->ds_dir);
2263	}
2264}
2265
2266static const char *objset_types[DMU_OST_NUMTYPES] = {
2267	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
2268
2269static void
2270dump_dir(objset_t *os)
2271{
2272	dmu_objset_stats_t dds;
2273	uint64_t object, object_count;
2274	uint64_t refdbytes, usedobjs, scratch;
2275	char numbuf[32];
2276	char blkbuf[BP_SPRINTF_LEN + 20];
2277	char osname[ZFS_MAX_DATASET_NAME_LEN];
2278	const char *type = "UNKNOWN";
2279	int verbosity = dump_opt['d'];
2280	int print_header = 1;
2281	unsigned i;
2282	int error;
2283
2284	/* make sure nicenum has enough space */
2285	CTASSERT(sizeof (numbuf) >= NN_NUMBUF_SZ);
2286
2287	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
2288	dmu_objset_fast_stat(os, &dds);
2289	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
2290
2291	if (dds.dds_type < DMU_OST_NUMTYPES)
2292		type = objset_types[dds.dds_type];
2293
2294	if (dds.dds_type == DMU_OST_META) {
2295		dds.dds_creation_txg = TXG_INITIAL;
2296		usedobjs = BP_GET_FILL(os->os_rootbp);
2297		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
2298		    dd_used_bytes;
2299	} else {
2300		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
2301	}
2302
2303	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
2304
2305	zdb_nicenum(refdbytes, numbuf, sizeof (numbuf));
2306
2307	if (verbosity >= 4) {
2308		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
2309		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
2310		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
2311	} else {
2312		blkbuf[0] = '\0';
2313	}
2314
2315	dmu_objset_name(os, osname);
2316
2317	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
2318	    "%s, %llu objects%s%s\n",
2319	    osname, type, (u_longlong_t)dmu_objset_id(os),
2320	    (u_longlong_t)dds.dds_creation_txg,
2321	    numbuf, (u_longlong_t)usedobjs, blkbuf,
2322	    (dds.dds_inconsistent) ? " (inconsistent)" : "");
2323
2324	if (zopt_objects != 0) {
2325		for (i = 0; i < zopt_objects; i++)
2326			dump_object(os, zopt_object[i], verbosity,
2327			    &print_header);
2328		(void) printf("\n");
2329		return;
2330	}
2331
2332	if (dump_opt['i'] != 0 || verbosity >= 2)
2333		dump_intent_log(dmu_objset_zil(os));
2334
2335	if (dmu_objset_ds(os) != NULL) {
2336		dsl_dataset_t *ds = dmu_objset_ds(os);
2337		dump_deadlist(&ds->ds_deadlist);
2338
2339		if (dsl_dataset_remap_deadlist_exists(ds)) {
2340			(void) printf("ds_remap_deadlist:\n");
2341			dump_deadlist(&ds->ds_remap_deadlist);
2342		}
2343		count_ds_mos_objects(ds);
2344	}
2345
2346	if (verbosity < 2)
2347		return;
2348
2349	if (BP_IS_HOLE(os->os_rootbp))
2350		return;
2351
2352	dump_object(os, 0, verbosity, &print_header);
2353	object_count = 0;
2354	if (DMU_USERUSED_DNODE(os) != NULL &&
2355	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
2356		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header);
2357		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header);
2358	}
2359
2360	object = 0;
2361	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2362		dump_object(os, object, verbosity, &print_header);
2363		object_count++;
2364	}
2365
2366	ASSERT3U(object_count, ==, usedobjs);
2367
2368	(void) printf("\n");
2369
2370	if (error != ESRCH) {
2371		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2372		abort();
2373	}
2374	if (leaked_objects != 0) {
2375		(void) printf("%d potentially leaked objects detected\n",
2376		    leaked_objects);
2377		leaked_objects = 0;
2378	}
2379}
2380
2381static void
2382dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2383{
2384	time_t timestamp = ub->ub_timestamp;
2385
2386	(void) printf("%s", header ? header : "");
2387	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2388	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2389	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2390	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2391	(void) printf("\ttimestamp = %llu UTC = %s",
2392	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2393	if (dump_opt['u'] >= 3) {
2394		char blkbuf[BP_SPRINTF_LEN];
2395		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2396		(void) printf("\trootbp = %s\n", blkbuf);
2397	}
2398	(void) printf("\tcheckpoint_txg = %llu\n",
2399	    (u_longlong_t)ub->ub_checkpoint_txg);
2400	(void) printf("%s", footer ? footer : "");
2401}
2402
2403static void
2404dump_config(spa_t *spa)
2405{
2406	dmu_buf_t *db;
2407	size_t nvsize = 0;
2408	int error = 0;
2409
2410
2411	error = dmu_bonus_hold(spa->spa_meta_objset,
2412	    spa->spa_config_object, FTAG, &db);
2413
2414	if (error == 0) {
2415		nvsize = *(uint64_t *)db->db_data;
2416		dmu_buf_rele(db, FTAG);
2417
2418		(void) printf("\nMOS Configuration:\n");
2419		dump_packed_nvlist(spa->spa_meta_objset,
2420		    spa->spa_config_object, (void *)&nvsize, 1);
2421	} else {
2422		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2423		    (u_longlong_t)spa->spa_config_object, error);
2424	}
2425}
2426
2427static void
2428dump_cachefile(const char *cachefile)
2429{
2430	int fd;
2431	struct stat64 statbuf;
2432	char *buf;
2433	nvlist_t *config;
2434
2435	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2436		(void) printf("cannot open '%s': %s\n", cachefile,
2437		    strerror(errno));
2438		exit(1);
2439	}
2440
2441	if (fstat64(fd, &statbuf) != 0) {
2442		(void) printf("failed to stat '%s': %s\n", cachefile,
2443		    strerror(errno));
2444		exit(1);
2445	}
2446
2447	if ((buf = malloc(statbuf.st_size)) == NULL) {
2448		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
2449		    (u_longlong_t)statbuf.st_size);
2450		exit(1);
2451	}
2452
2453	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2454		(void) fprintf(stderr, "failed to read %llu bytes\n",
2455		    (u_longlong_t)statbuf.st_size);
2456		exit(1);
2457	}
2458
2459	(void) close(fd);
2460
2461	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2462		(void) fprintf(stderr, "failed to unpack nvlist\n");
2463		exit(1);
2464	}
2465
2466	free(buf);
2467
2468	dump_nvlist(config, 0);
2469
2470	nvlist_free(config);
2471}
2472
2473#define	ZDB_MAX_UB_HEADER_SIZE 32
2474
2475static void
2476dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2477{
2478	vdev_t vd;
2479	vdev_t *vdp = &vd;
2480	char header[ZDB_MAX_UB_HEADER_SIZE];
2481
2482	vd.vdev_ashift = ashift;
2483	vdp->vdev_top = vdp;
2484
2485	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2486		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2487		uberblock_t *ub = (void *)((char *)lbl + uoff);
2488
2489		if (uberblock_verify(ub))
2490			continue;
2491		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2492		    "Uberblock[%d]\n", i);
2493		dump_uberblock(ub, header, "");
2494	}
2495}
2496
2497static char curpath[PATH_MAX];
2498
2499/*
2500 * Iterate through the path components, recursively passing
2501 * current one's obj and remaining path until we find the obj
2502 * for the last one.
2503 */
2504static int
2505dump_path_impl(objset_t *os, uint64_t obj, char *name)
2506{
2507	int err;
2508	int header = 1;
2509	uint64_t child_obj;
2510	char *s;
2511	dmu_buf_t *db;
2512	dmu_object_info_t doi;
2513
2514	if ((s = strchr(name, '/')) != NULL)
2515		*s = '\0';
2516	err = zap_lookup(os, obj, name, 8, 1, &child_obj);
2517
2518	(void) strlcat(curpath, name, sizeof (curpath));
2519
2520	if (err != 0) {
2521		(void) fprintf(stderr, "failed to lookup %s: %s\n",
2522		    curpath, strerror(err));
2523		return (err);
2524	}
2525
2526	child_obj = ZFS_DIRENT_OBJ(child_obj);
2527	err = sa_buf_hold(os, child_obj, FTAG, &db);
2528	if (err != 0) {
2529		(void) fprintf(stderr,
2530		    "failed to get SA dbuf for obj %llu: %s\n",
2531		    (u_longlong_t)child_obj, strerror(err));
2532		return (EINVAL);
2533	}
2534	dmu_object_info_from_db(db, &doi);
2535	sa_buf_rele(db, FTAG);
2536
2537	if (doi.doi_bonus_type != DMU_OT_SA &&
2538	    doi.doi_bonus_type != DMU_OT_ZNODE) {
2539		(void) fprintf(stderr, "invalid bonus type %d for obj %llu\n",
2540		    doi.doi_bonus_type, (u_longlong_t)child_obj);
2541		return (EINVAL);
2542	}
2543
2544	if (dump_opt['v'] > 6) {
2545		(void) printf("obj=%llu %s type=%d bonustype=%d\n",
2546		    (u_longlong_t)child_obj, curpath, doi.doi_type,
2547		    doi.doi_bonus_type);
2548	}
2549
2550	(void) strlcat(curpath, "/", sizeof (curpath));
2551
2552	switch (doi.doi_type) {
2553	case DMU_OT_DIRECTORY_CONTENTS:
2554		if (s != NULL && *(s + 1) != '\0')
2555			return (dump_path_impl(os, child_obj, s + 1));
2556		/*FALLTHROUGH*/
2557	case DMU_OT_PLAIN_FILE_CONTENTS:
2558		dump_object(os, child_obj, dump_opt['v'], &header);
2559		return (0);
2560	default:
2561		(void) fprintf(stderr, "object %llu has non-file/directory "
2562		    "type %d\n", (u_longlong_t)obj, doi.doi_type);
2563		break;
2564	}
2565
2566	return (EINVAL);
2567}
2568
2569/*
2570 * Dump the blocks for the object specified by path inside the dataset.
2571 */
2572static int
2573dump_path(char *ds, char *path)
2574{
2575	int err;
2576	objset_t *os;
2577	uint64_t root_obj;
2578
2579	err = open_objset(ds, DMU_OST_ZFS, FTAG, &os);
2580	if (err != 0)
2581		return (err);
2582
2583	err = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &root_obj);
2584	if (err != 0) {
2585		(void) fprintf(stderr, "can't lookup root znode: %s\n",
2586		    strerror(err));
2587		dmu_objset_disown(os, FTAG);
2588		return (EINVAL);
2589	}
2590
2591	(void) snprintf(curpath, sizeof (curpath), "dataset=%s path=/", ds);
2592
2593	err = dump_path_impl(os, root_obj, path);
2594
2595	close_objset(os, FTAG);
2596	return (err);
2597}
2598
2599static int
2600dump_label(const char *dev)
2601{
2602	int fd;
2603	vdev_label_t label;
2604	char path[MAXPATHLEN];
2605	char *buf = label.vl_vdev_phys.vp_nvlist;
2606	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2607	struct stat64 statbuf;
2608	uint64_t psize, ashift;
2609	boolean_t label_found = B_FALSE;
2610
2611	(void) strlcpy(path, dev, sizeof (path));
2612	if (dev[0] == '/') {
2613		if (strncmp(dev, ZFS_DISK_ROOTD,
2614		    strlen(ZFS_DISK_ROOTD)) == 0) {
2615			(void) snprintf(path, sizeof (path), "%s%s",
2616			    ZFS_RDISK_ROOTD, dev + strlen(ZFS_DISK_ROOTD));
2617		}
2618	} else if (stat64(path, &statbuf) != 0) {
2619		char *s;
2620
2621		(void) snprintf(path, sizeof (path), "%s%s", ZFS_RDISK_ROOTD,
2622		    dev);
2623		if (((s = strrchr(dev, 's')) == NULL &&
2624		    (s = strchr(dev, 'p')) == NULL) ||
2625		    !isdigit(*(s + 1)))
2626			(void) strlcat(path, "s0", sizeof (path));
2627	}
2628
2629	if ((fd = open64(path, O_RDONLY)) < 0) {
2630		(void) fprintf(stderr, "cannot open '%s': %s\n", path,
2631		    strerror(errno));
2632		exit(1);
2633	}
2634
2635	if (fstat64(fd, &statbuf) != 0) {
2636		(void) fprintf(stderr, "failed to stat '%s': %s\n", path,
2637		    strerror(errno));
2638		(void) close(fd);
2639		exit(1);
2640	}
2641
2642	if (S_ISBLK(statbuf.st_mode)) {
2643		(void) fprintf(stderr,
2644		    "cannot use '%s': character device required\n", path);
2645		(void) close(fd);
2646		exit(1);
2647	}
2648
2649	psize = statbuf.st_size;
2650	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2651
2652	for (int l = 0; l < VDEV_LABELS; l++) {
2653		nvlist_t *config = NULL;
2654
2655		if (!dump_opt['q']) {
2656			(void) printf("------------------------------------\n");
2657			(void) printf("LABEL %d\n", l);
2658			(void) printf("------------------------------------\n");
2659		}
2660
2661		if (pread64(fd, &label, sizeof (label),
2662		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2663			if (!dump_opt['q'])
2664				(void) printf("failed to read label %d\n", l);
2665			continue;
2666		}
2667
2668		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2669			if (!dump_opt['q'])
2670				(void) printf("failed to unpack label %d\n", l);
2671			ashift = SPA_MINBLOCKSHIFT;
2672		} else {
2673			nvlist_t *vdev_tree = NULL;
2674
2675			if (!dump_opt['q'])
2676				dump_nvlist(config, 4);
2677			if ((nvlist_lookup_nvlist(config,
2678			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2679			    (nvlist_lookup_uint64(vdev_tree,
2680			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2681				ashift = SPA_MINBLOCKSHIFT;
2682			nvlist_free(config);
2683			label_found = B_TRUE;
2684		}
2685		if (dump_opt['u'])
2686			dump_label_uberblocks(&label, ashift);
2687	}
2688
2689	(void) close(fd);
2690
2691	return (label_found ? 0 : 2);
2692}
2693
2694static uint64_t dataset_feature_count[SPA_FEATURES];
2695static uint64_t remap_deadlist_count = 0;
2696
2697/*ARGSUSED*/
2698static int
2699dump_one_dir(const char *dsname, void *arg)
2700{
2701	int error;
2702	objset_t *os;
2703
2704	error = open_objset(dsname, DMU_OST_ANY, FTAG, &os);
2705	if (error != 0)
2706		return (0);
2707
2708	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
2709		if (!dmu_objset_ds(os)->ds_feature_inuse[f])
2710			continue;
2711		ASSERT(spa_feature_table[f].fi_flags &
2712		    ZFEATURE_FLAG_PER_DATASET);
2713		dataset_feature_count[f]++;
2714	}
2715
2716	if (dsl_dataset_remap_deadlist_exists(dmu_objset_ds(os))) {
2717		remap_deadlist_count++;
2718	}
2719
2720	dump_dir(os);
2721	close_objset(os, FTAG);
2722	fuid_table_destroy();
2723	return (0);
2724}
2725
2726/*
2727 * Block statistics.
2728 */
2729#define	PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2730typedef struct zdb_blkstats {
2731	uint64_t zb_asize;
2732	uint64_t zb_lsize;
2733	uint64_t zb_psize;
2734	uint64_t zb_count;
2735	uint64_t zb_gangs;
2736	uint64_t zb_ditto_samevdev;
2737	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2738} zdb_blkstats_t;
2739
2740/*
2741 * Extended object types to report deferred frees and dedup auto-ditto blocks.
2742 */
2743#define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
2744#define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
2745#define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
2746#define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
2747
2748static const char *zdb_ot_extname[] = {
2749	"deferred free",
2750	"dedup ditto",
2751	"other",
2752	"Total",
2753};
2754
2755#define	ZB_TOTAL	DN_MAX_LEVELS
2756
2757typedef struct zdb_cb {
2758	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2759	uint64_t	zcb_removing_size;
2760	uint64_t	zcb_checkpoint_size;
2761	uint64_t	zcb_dedup_asize;
2762	uint64_t	zcb_dedup_blocks;
2763	uint64_t	zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2764	uint64_t	zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2765	    [BPE_PAYLOAD_SIZE];
2766	uint64_t	zcb_start;
2767	hrtime_t	zcb_lastprint;
2768	uint64_t	zcb_totalasize;
2769	uint64_t	zcb_errors[256];
2770	int		zcb_readfails;
2771	int		zcb_haderrors;
2772	spa_t		*zcb_spa;
2773	uint32_t	**zcb_vd_obsolete_counts;
2774} zdb_cb_t;
2775
2776static void
2777zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2778    dmu_object_type_t type)
2779{
2780	uint64_t refcnt = 0;
2781
2782	ASSERT(type < ZDB_OT_TOTAL);
2783
2784	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2785		return;
2786
2787	for (int i = 0; i < 4; i++) {
2788		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2789		int t = (i & 1) ? type : ZDB_OT_TOTAL;
2790		int equal;
2791		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2792
2793		zb->zb_asize += BP_GET_ASIZE(bp);
2794		zb->zb_lsize += BP_GET_LSIZE(bp);
2795		zb->zb_psize += BP_GET_PSIZE(bp);
2796		zb->zb_count++;
2797
2798		/*
2799		 * The histogram is only big enough to record blocks up to
2800		 * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2801		 * "other", bucket.
2802		 */
2803		unsigned idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2804		idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2805		zb->zb_psize_histogram[idx]++;
2806
2807		zb->zb_gangs += BP_COUNT_GANG(bp);
2808
2809		switch (BP_GET_NDVAS(bp)) {
2810		case 2:
2811			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2812			    DVA_GET_VDEV(&bp->blk_dva[1]))
2813				zb->zb_ditto_samevdev++;
2814			break;
2815		case 3:
2816			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2817			    DVA_GET_VDEV(&bp->blk_dva[1])) +
2818			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2819			    DVA_GET_VDEV(&bp->blk_dva[2])) +
2820			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2821			    DVA_GET_VDEV(&bp->blk_dva[2]));
2822			if (equal != 0)
2823				zb->zb_ditto_samevdev++;
2824			break;
2825		}
2826
2827	}
2828
2829	if (BP_IS_EMBEDDED(bp)) {
2830		zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2831		zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2832		    [BPE_GET_PSIZE(bp)]++;
2833		return;
2834	}
2835
2836	if (dump_opt['L'])
2837		return;
2838
2839	if (BP_GET_DEDUP(bp)) {
2840		ddt_t *ddt;
2841		ddt_entry_t *dde;
2842
2843		ddt = ddt_select(zcb->zcb_spa, bp);
2844		ddt_enter(ddt);
2845		dde = ddt_lookup(ddt, bp, B_FALSE);
2846
2847		if (dde == NULL) {
2848			refcnt = 0;
2849		} else {
2850			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2851			ddt_phys_decref(ddp);
2852			refcnt = ddp->ddp_refcnt;
2853			if (ddt_phys_total_refcnt(dde) == 0)
2854				ddt_remove(ddt, dde);
2855		}
2856		ddt_exit(ddt);
2857	}
2858
2859	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2860	    refcnt ? 0 : spa_min_claim_txg(zcb->zcb_spa),
2861	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2862}
2863
2864static void
2865zdb_blkptr_done(zio_t *zio)
2866{
2867	spa_t *spa = zio->io_spa;
2868	blkptr_t *bp = zio->io_bp;
2869	int ioerr = zio->io_error;
2870	zdb_cb_t *zcb = zio->io_private;
2871	zbookmark_phys_t *zb = &zio->io_bookmark;
2872
2873	abd_free(zio->io_abd);
2874
2875	mutex_enter(&spa->spa_scrub_lock);
2876	spa->spa_scrub_inflight--;
2877	cv_broadcast(&spa->spa_scrub_io_cv);
2878
2879	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
2880		char blkbuf[BP_SPRINTF_LEN];
2881
2882		zcb->zcb_haderrors = 1;
2883		zcb->zcb_errors[ioerr]++;
2884
2885		if (dump_opt['b'] >= 2)
2886			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2887		else
2888			blkbuf[0] = '\0';
2889
2890		(void) printf("zdb_blkptr_cb: "
2891		    "Got error %d reading "
2892		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
2893		    ioerr,
2894		    (u_longlong_t)zb->zb_objset,
2895		    (u_longlong_t)zb->zb_object,
2896		    (u_longlong_t)zb->zb_level,
2897		    (u_longlong_t)zb->zb_blkid,
2898		    blkbuf);
2899	}
2900	mutex_exit(&spa->spa_scrub_lock);
2901}
2902
2903static int
2904zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2905    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2906{
2907	zdb_cb_t *zcb = arg;
2908	dmu_object_type_t type;
2909	boolean_t is_metadata;
2910
2911	if (bp == NULL)
2912		return (0);
2913
2914	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
2915		char blkbuf[BP_SPRINTF_LEN];
2916		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2917		(void) printf("objset %llu object %llu "
2918		    "level %lld offset 0x%llx %s\n",
2919		    (u_longlong_t)zb->zb_objset,
2920		    (u_longlong_t)zb->zb_object,
2921		    (longlong_t)zb->zb_level,
2922		    (u_longlong_t)blkid2offset(dnp, bp, zb),
2923		    blkbuf);
2924	}
2925
2926	if (BP_IS_HOLE(bp))
2927		return (0);
2928
2929	type = BP_GET_TYPE(bp);
2930
2931	zdb_count_block(zcb, zilog, bp,
2932	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
2933
2934	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
2935
2936	if (!BP_IS_EMBEDDED(bp) &&
2937	    (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
2938		size_t size = BP_GET_PSIZE(bp);
2939		abd_t *abd = abd_alloc(size, B_FALSE);
2940		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
2941
2942		/* If it's an intent log block, failure is expected. */
2943		if (zb->zb_level == ZB_ZIL_LEVEL)
2944			flags |= ZIO_FLAG_SPECULATIVE;
2945
2946		mutex_enter(&spa->spa_scrub_lock);
2947		while (spa->spa_scrub_inflight > max_inflight)
2948			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
2949		spa->spa_scrub_inflight++;
2950		mutex_exit(&spa->spa_scrub_lock);
2951
2952		zio_nowait(zio_read(NULL, spa, bp, abd, size,
2953		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
2954	}
2955
2956	zcb->zcb_readfails = 0;
2957
2958	/* only call gethrtime() every 100 blocks */
2959	static int iters;
2960	if (++iters > 100)
2961		iters = 0;
2962	else
2963		return (0);
2964
2965	if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
2966		uint64_t now = gethrtime();
2967		char buf[10];
2968		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
2969		int kb_per_sec =
2970		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
2971		int sec_remaining =
2972		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
2973
2974		/* make sure nicenum has enough space */
2975		CTASSERT(sizeof (buf) >= NN_NUMBUF_SZ);
2976
2977		zfs_nicenum(bytes, buf, sizeof (buf));
2978		(void) fprintf(stderr,
2979		    "\r%5s completed (%4dMB/s) "
2980		    "estimated time remaining: %uhr %02umin %02usec        ",
2981		    buf, kb_per_sec / 1024,
2982		    sec_remaining / 60 / 60,
2983		    sec_remaining / 60 % 60,
2984		    sec_remaining % 60);
2985
2986		zcb->zcb_lastprint = now;
2987	}
2988
2989	return (0);
2990}
2991
2992static void
2993zdb_leak(void *arg, uint64_t start, uint64_t size)
2994{
2995	vdev_t *vd = arg;
2996
2997	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
2998	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
2999}
3000
3001static metaslab_ops_t zdb_metaslab_ops = {
3002	NULL	/* alloc */
3003};
3004
3005static void
3006zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
3007{
3008	ddt_bookmark_t ddb;
3009	ddt_entry_t dde;
3010	int error;
3011
3012	bzero(&ddb, sizeof (ddb));
3013	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
3014		blkptr_t blk;
3015		ddt_phys_t *ddp = dde.dde_phys;
3016
3017		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
3018			return;
3019
3020		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
3021
3022		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
3023			if (ddp->ddp_phys_birth == 0)
3024				continue;
3025			ddt_bp_create(ddb.ddb_checksum,
3026			    &dde.dde_key, ddp, &blk);
3027			if (p == DDT_PHYS_DITTO) {
3028				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
3029			} else {
3030				zcb->zcb_dedup_asize +=
3031				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
3032				zcb->zcb_dedup_blocks++;
3033			}
3034		}
3035		if (!dump_opt['L']) {
3036			ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
3037			ddt_enter(ddt);
3038			VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
3039			ddt_exit(ddt);
3040		}
3041	}
3042
3043	ASSERT(error == ENOENT);
3044}
3045
3046/* ARGSUSED */
3047static void
3048claim_segment_impl_cb(uint64_t inner_offset, vdev_t *vd, uint64_t offset,
3049    uint64_t size, void *arg)
3050{
3051	/*
3052	 * This callback was called through a remap from
3053	 * a device being removed. Therefore, the vdev that
3054	 * this callback is applied to is a concrete
3055	 * vdev.
3056	 */
3057	ASSERT(vdev_is_concrete(vd));
3058
3059	VERIFY0(metaslab_claim_impl(vd, offset, size,
3060	    spa_min_claim_txg(vd->vdev_spa)));
3061}
3062
3063static void
3064claim_segment_cb(void *arg, uint64_t offset, uint64_t size)
3065{
3066	vdev_t *vd = arg;
3067
3068	vdev_indirect_ops.vdev_op_remap(vd, offset, size,
3069	    claim_segment_impl_cb, NULL);
3070}
3071
3072/*
3073 * After accounting for all allocated blocks that are directly referenced,
3074 * we might have missed a reference to a block from a partially complete
3075 * (and thus unused) indirect mapping object. We perform a secondary pass
3076 * through the metaslabs we have already mapped and claim the destination
3077 * blocks.
3078 */
3079static void
3080zdb_claim_removing(spa_t *spa, zdb_cb_t *zcb)
3081{
3082	if (spa->spa_vdev_removal == NULL)
3083		return;
3084
3085	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3086
3087	spa_vdev_removal_t *svr = spa->spa_vdev_removal;
3088	vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id);
3089	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3090
3091	for (uint64_t msi = 0; msi < vd->vdev_ms_count; msi++) {
3092		metaslab_t *msp = vd->vdev_ms[msi];
3093
3094		if (msp->ms_start >= vdev_indirect_mapping_max_offset(vim))
3095			break;
3096
3097		ASSERT0(range_tree_space(svr->svr_allocd_segs));
3098
3099		if (msp->ms_sm != NULL) {
3100			VERIFY0(space_map_load(msp->ms_sm,
3101			    svr->svr_allocd_segs, SM_ALLOC));
3102
3103			/*
3104			 * Clear everything past what has been synced unless
3105			 * it's past the spacemap, because we have not allocated
3106			 * mappings for it yet.
3107			 */
3108			uint64_t vim_max_offset =
3109			    vdev_indirect_mapping_max_offset(vim);
3110			uint64_t sm_end = msp->ms_sm->sm_start +
3111			    msp->ms_sm->sm_size;
3112			if (sm_end > vim_max_offset)
3113				range_tree_clear(svr->svr_allocd_segs,
3114				    vim_max_offset, sm_end - vim_max_offset);
3115		}
3116
3117		zcb->zcb_removing_size +=
3118		    range_tree_space(svr->svr_allocd_segs);
3119		range_tree_vacate(svr->svr_allocd_segs, claim_segment_cb, vd);
3120	}
3121
3122	spa_config_exit(spa, SCL_CONFIG, FTAG);
3123}
3124
3125/* ARGSUSED */
3126static int
3127increment_indirect_mapping_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3128{
3129	zdb_cb_t *zcb = arg;
3130	spa_t *spa = zcb->zcb_spa;
3131	vdev_t *vd;
3132	const dva_t *dva = &bp->blk_dva[0];
3133
3134	ASSERT(!dump_opt['L']);
3135	ASSERT3U(BP_GET_NDVAS(bp), ==, 1);
3136
3137	spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
3138	vd = vdev_lookup_top(zcb->zcb_spa, DVA_GET_VDEV(dva));
3139	ASSERT3P(vd, !=, NULL);
3140	spa_config_exit(spa, SCL_VDEV, FTAG);
3141
3142	ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0);
3143	ASSERT3P(zcb->zcb_vd_obsolete_counts[vd->vdev_id], !=, NULL);
3144
3145	vdev_indirect_mapping_increment_obsolete_count(
3146	    vd->vdev_indirect_mapping,
3147	    DVA_GET_OFFSET(dva), DVA_GET_ASIZE(dva),
3148	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3149
3150	return (0);
3151}
3152
3153static uint32_t *
3154zdb_load_obsolete_counts(vdev_t *vd)
3155{
3156	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3157	spa_t *spa = vd->vdev_spa;
3158	spa_condensing_indirect_phys_t *scip =
3159	    &spa->spa_condensing_indirect_phys;
3160	uint32_t *counts;
3161
3162	EQUIV(vdev_obsolete_sm_object(vd) != 0, vd->vdev_obsolete_sm != NULL);
3163	counts = vdev_indirect_mapping_load_obsolete_counts(vim);
3164	if (vd->vdev_obsolete_sm != NULL) {
3165		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3166		    vd->vdev_obsolete_sm);
3167	}
3168	if (scip->scip_vdev == vd->vdev_id &&
3169	    scip->scip_prev_obsolete_sm_object != 0) {
3170		space_map_t *prev_obsolete_sm = NULL;
3171		VERIFY0(space_map_open(&prev_obsolete_sm, spa->spa_meta_objset,
3172		    scip->scip_prev_obsolete_sm_object, 0, vd->vdev_asize, 0));
3173		space_map_update(prev_obsolete_sm);
3174		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3175		    prev_obsolete_sm);
3176		space_map_close(prev_obsolete_sm);
3177	}
3178	return (counts);
3179}
3180
3181typedef struct checkpoint_sm_exclude_entry_arg {
3182	vdev_t *cseea_vd;
3183	uint64_t cseea_checkpoint_size;
3184} checkpoint_sm_exclude_entry_arg_t;
3185
3186static int
3187checkpoint_sm_exclude_entry_cb(space_map_entry_t *sme, void *arg)
3188{
3189	checkpoint_sm_exclude_entry_arg_t *cseea = arg;
3190	vdev_t *vd = cseea->cseea_vd;
3191	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
3192	uint64_t end = sme->sme_offset + sme->sme_run;
3193
3194	ASSERT(sme->sme_type == SM_FREE);
3195
3196	/*
3197	 * Since the vdev_checkpoint_sm exists in the vdev level
3198	 * and the ms_sm space maps exist in the metaslab level,
3199	 * an entry in the checkpoint space map could theoretically
3200	 * cross the boundaries of the metaslab that it belongs.
3201	 *
3202	 * In reality, because of the way that we populate and
3203	 * manipulate the checkpoint's space maps currently,
3204	 * there shouldn't be any entries that cross metaslabs.
3205	 * Hence the assertion below.
3206	 *
3207	 * That said, there is no fundamental requirement that
3208	 * the checkpoint's space map entries should not cross
3209	 * metaslab boundaries. So if needed we could add code
3210	 * that handles metaslab-crossing segments in the future.
3211	 */
3212	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
3213	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
3214
3215	/*
3216	 * By removing the entry from the allocated segments we
3217	 * also verify that the entry is there to begin with.
3218	 */
3219	mutex_enter(&ms->ms_lock);
3220	range_tree_remove(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
3221	mutex_exit(&ms->ms_lock);
3222
3223	cseea->cseea_checkpoint_size += sme->sme_run;
3224	return (0);
3225}
3226
3227static void
3228zdb_leak_init_vdev_exclude_checkpoint(vdev_t *vd, zdb_cb_t *zcb)
3229{
3230	spa_t *spa = vd->vdev_spa;
3231	space_map_t *checkpoint_sm = NULL;
3232	uint64_t checkpoint_sm_obj;
3233
3234	/*
3235	 * If there is no vdev_top_zap, we are in a pool whose
3236	 * version predates the pool checkpoint feature.
3237	 */
3238	if (vd->vdev_top_zap == 0)
3239		return;
3240
3241	/*
3242	 * If there is no reference of the vdev_checkpoint_sm in
3243	 * the vdev_top_zap, then one of the following scenarios
3244	 * is true:
3245	 *
3246	 * 1] There is no checkpoint
3247	 * 2] There is a checkpoint, but no checkpointed blocks
3248	 *    have been freed yet
3249	 * 3] The current vdev is indirect
3250	 *
3251	 * In these cases we return immediately.
3252	 */
3253	if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
3254	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
3255		return;
3256
3257	VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
3258	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1,
3259	    &checkpoint_sm_obj));
3260
3261	checkpoint_sm_exclude_entry_arg_t cseea;
3262	cseea.cseea_vd = vd;
3263	cseea.cseea_checkpoint_size = 0;
3264
3265	VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
3266	    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
3267	space_map_update(checkpoint_sm);
3268
3269	VERIFY0(space_map_iterate(checkpoint_sm,
3270	    checkpoint_sm_exclude_entry_cb, &cseea));
3271	space_map_close(checkpoint_sm);
3272
3273	zcb->zcb_checkpoint_size += cseea.cseea_checkpoint_size;
3274}
3275
3276static void
3277zdb_leak_init_exclude_checkpoint(spa_t *spa, zdb_cb_t *zcb)
3278{
3279	vdev_t *rvd = spa->spa_root_vdev;
3280	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3281		ASSERT3U(c, ==, rvd->vdev_child[c]->vdev_id);
3282		zdb_leak_init_vdev_exclude_checkpoint(rvd->vdev_child[c], zcb);
3283	}
3284}
3285
3286static void
3287load_concrete_ms_allocatable_trees(spa_t *spa, maptype_t maptype)
3288{
3289	vdev_t *rvd = spa->spa_root_vdev;
3290	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
3291		vdev_t *vd = rvd->vdev_child[i];
3292
3293		ASSERT3U(i, ==, vd->vdev_id);
3294
3295		if (vd->vdev_ops == &vdev_indirect_ops)
3296			continue;
3297
3298		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3299			metaslab_t *msp = vd->vdev_ms[m];
3300
3301			(void) fprintf(stderr,
3302			    "\rloading concrete vdev %llu, "
3303			    "metaslab %llu of %llu ...",
3304			    (longlong_t)vd->vdev_id,
3305			    (longlong_t)msp->ms_id,
3306			    (longlong_t)vd->vdev_ms_count);
3307
3308			mutex_enter(&msp->ms_lock);
3309			metaslab_unload(msp);
3310
3311			/*
3312			 * We don't want to spend the CPU manipulating the
3313			 * size-ordered tree, so clear the range_tree ops.
3314			 */
3315			msp->ms_allocatable->rt_ops = NULL;
3316
3317			if (msp->ms_sm != NULL) {
3318				VERIFY0(space_map_load(msp->ms_sm,
3319				    msp->ms_allocatable, maptype));
3320			}
3321			if (!msp->ms_loaded)
3322				msp->ms_loaded = B_TRUE;
3323			mutex_exit(&msp->ms_lock);
3324		}
3325	}
3326}
3327
3328/*
3329 * vm_idxp is an in-out parameter which (for indirect vdevs) is the
3330 * index in vim_entries that has the first entry in this metaslab.
3331 * On return, it will be set to the first entry after this metaslab.
3332 */
3333static void
3334load_indirect_ms_allocatable_tree(vdev_t *vd, metaslab_t *msp,
3335    uint64_t *vim_idxp)
3336{
3337	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3338
3339	mutex_enter(&msp->ms_lock);
3340	metaslab_unload(msp);
3341
3342	/*
3343	 * We don't want to spend the CPU manipulating the
3344	 * size-ordered tree, so clear the range_tree ops.
3345	 */
3346	msp->ms_allocatable->rt_ops = NULL;
3347
3348	for (; *vim_idxp < vdev_indirect_mapping_num_entries(vim);
3349	    (*vim_idxp)++) {
3350		vdev_indirect_mapping_entry_phys_t *vimep =
3351		    &vim->vim_entries[*vim_idxp];
3352		uint64_t ent_offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3353		uint64_t ent_len = DVA_GET_ASIZE(&vimep->vimep_dst);
3354		ASSERT3U(ent_offset, >=, msp->ms_start);
3355		if (ent_offset >= msp->ms_start + msp->ms_size)
3356			break;
3357
3358		/*
3359		 * Mappings do not cross metaslab boundaries,
3360		 * because we create them by walking the metaslabs.
3361		 */
3362		ASSERT3U(ent_offset + ent_len, <=,
3363		    msp->ms_start + msp->ms_size);
3364		range_tree_add(msp->ms_allocatable, ent_offset, ent_len);
3365	}
3366
3367	if (!msp->ms_loaded)
3368		msp->ms_loaded = B_TRUE;
3369	mutex_exit(&msp->ms_lock);
3370}
3371
3372static void
3373zdb_leak_init_prepare_indirect_vdevs(spa_t *spa, zdb_cb_t *zcb)
3374{
3375	vdev_t *rvd = spa->spa_root_vdev;
3376	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3377		vdev_t *vd = rvd->vdev_child[c];
3378
3379		ASSERT3U(c, ==, vd->vdev_id);
3380
3381		if (vd->vdev_ops != &vdev_indirect_ops)
3382			continue;
3383
3384		/*
3385		 * Note: we don't check for mapping leaks on
3386		 * removing vdevs because their ms_allocatable's
3387		 * are used to look for leaks in allocated space.
3388		 */
3389		zcb->zcb_vd_obsolete_counts[c] = zdb_load_obsolete_counts(vd);
3390
3391		/*
3392		 * Normally, indirect vdevs don't have any
3393		 * metaslabs.  We want to set them up for
3394		 * zio_claim().
3395		 */
3396		VERIFY0(vdev_metaslab_init(vd, 0));
3397
3398		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3399		uint64_t vim_idx = 0;
3400		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3401
3402			(void) fprintf(stderr,
3403			    "\rloading indirect vdev %llu, "
3404			    "metaslab %llu of %llu ...",
3405			    (longlong_t)vd->vdev_id,
3406			    (longlong_t)vd->vdev_ms[m]->ms_id,
3407			    (longlong_t)vd->vdev_ms_count);
3408
3409			load_indirect_ms_allocatable_tree(vd, vd->vdev_ms[m],
3410			    &vim_idx);
3411		}
3412		ASSERT3U(vim_idx, ==, vdev_indirect_mapping_num_entries(vim));
3413	}
3414}
3415
3416static void
3417zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
3418{
3419	zcb->zcb_spa = spa;
3420
3421	if (!dump_opt['L']) {
3422		dsl_pool_t *dp = spa->spa_dsl_pool;
3423		vdev_t *rvd = spa->spa_root_vdev;
3424
3425		/*
3426		 * We are going to be changing the meaning of the metaslab's
3427		 * ms_allocatable.  Ensure that the allocator doesn't try to
3428		 * use the tree.
3429		 */
3430		spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
3431		spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
3432
3433		zcb->zcb_vd_obsolete_counts =
3434		    umem_zalloc(rvd->vdev_children * sizeof (uint32_t *),
3435		    UMEM_NOFAIL);
3436
3437		/*
3438		 * For leak detection, we overload the ms_allocatable trees
3439		 * to contain allocated segments instead of free segments.
3440		 * As a result, we can't use the normal metaslab_load/unload
3441		 * interfaces.
3442		 */
3443		zdb_leak_init_prepare_indirect_vdevs(spa, zcb);
3444		load_concrete_ms_allocatable_trees(spa, SM_ALLOC);
3445
3446		/*
3447		 * On load_concrete_ms_allocatable_trees() we loaded all the
3448		 * allocated entries from the ms_sm to the ms_allocatable for
3449		 * each metaslab. If the pool has a checkpoint or is in the
3450		 * middle of discarding a checkpoint, some of these blocks
3451		 * may have been freed but their ms_sm may not have been
3452		 * updated because they are referenced by the checkpoint. In
3453		 * order to avoid false-positives during leak-detection, we
3454		 * go through the vdev's checkpoint space map and exclude all
3455		 * its entries from their relevant ms_allocatable.
3456		 *
3457		 * We also aggregate the space held by the checkpoint and add
3458		 * it to zcb_checkpoint_size.
3459		 *
3460		 * Note that at this point we are also verifying that all the
3461		 * entries on the checkpoint_sm are marked as allocated in
3462		 * the ms_sm of their relevant metaslab.
3463		 * [see comment in checkpoint_sm_exclude_entry_cb()]
3464		 */
3465		zdb_leak_init_exclude_checkpoint(spa, zcb);
3466
3467		/* for cleaner progress output */
3468		(void) fprintf(stderr, "\n");
3469
3470		if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
3471			ASSERT(spa_feature_is_enabled(spa,
3472			    SPA_FEATURE_DEVICE_REMOVAL));
3473			(void) bpobj_iterate_nofree(&dp->dp_obsolete_bpobj,
3474			    increment_indirect_mapping_cb, zcb, NULL);
3475		}
3476	} else {
3477		/*
3478		 * If leak tracing is disabled, we still need to consider
3479		 * any checkpointed space in our space verification.
3480		 */
3481		zcb->zcb_checkpoint_size += spa_get_checkpoint_space(spa);
3482	}
3483
3484	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3485	zdb_ddt_leak_init(spa, zcb);
3486	spa_config_exit(spa, SCL_CONFIG, FTAG);
3487}
3488
3489static boolean_t
3490zdb_check_for_obsolete_leaks(vdev_t *vd, zdb_cb_t *zcb)
3491{
3492	boolean_t leaks = B_FALSE;
3493	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3494	uint64_t total_leaked = 0;
3495
3496	ASSERT(vim != NULL);
3497
3498	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
3499		vdev_indirect_mapping_entry_phys_t *vimep =
3500		    &vim->vim_entries[i];
3501		uint64_t obsolete_bytes = 0;
3502		uint64_t offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3503		metaslab_t *msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
3504
3505		/*
3506		 * This is not very efficient but it's easy to
3507		 * verify correctness.
3508		 */
3509		for (uint64_t inner_offset = 0;
3510		    inner_offset < DVA_GET_ASIZE(&vimep->vimep_dst);
3511		    inner_offset += 1 << vd->vdev_ashift) {
3512			if (range_tree_contains(msp->ms_allocatable,
3513			    offset + inner_offset, 1 << vd->vdev_ashift)) {
3514				obsolete_bytes += 1 << vd->vdev_ashift;
3515			}
3516		}
3517
3518		int64_t bytes_leaked = obsolete_bytes -
3519		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i];
3520		ASSERT3U(DVA_GET_ASIZE(&vimep->vimep_dst), >=,
3521		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i]);
3522		if (bytes_leaked != 0 &&
3523		    (vdev_obsolete_counts_are_precise(vd) ||
3524		    dump_opt['d'] >= 5)) {
3525			(void) printf("obsolete indirect mapping count "
3526			    "mismatch on %llu:%llx:%llx : %llx bytes leaked\n",
3527			    (u_longlong_t)vd->vdev_id,
3528			    (u_longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
3529			    (u_longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
3530			    (u_longlong_t)bytes_leaked);
3531		}
3532		total_leaked += ABS(bytes_leaked);
3533	}
3534
3535	if (!vdev_obsolete_counts_are_precise(vd) && total_leaked > 0) {
3536		int pct_leaked = total_leaked * 100 /
3537		    vdev_indirect_mapping_bytes_mapped(vim);
3538		(void) printf("cannot verify obsolete indirect mapping "
3539		    "counts of vdev %llu because precise feature was not "
3540		    "enabled when it was removed: %d%% (%llx bytes) of mapping"
3541		    "unreferenced\n",
3542		    (u_longlong_t)vd->vdev_id, pct_leaked,
3543		    (u_longlong_t)total_leaked);
3544	} else if (total_leaked > 0) {
3545		(void) printf("obsolete indirect mapping count mismatch "
3546		    "for vdev %llu -- %llx total bytes mismatched\n",
3547		    (u_longlong_t)vd->vdev_id,
3548		    (u_longlong_t)total_leaked);
3549		leaks |= B_TRUE;
3550	}
3551
3552	vdev_indirect_mapping_free_obsolete_counts(vim,
3553	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3554	zcb->zcb_vd_obsolete_counts[vd->vdev_id] = NULL;
3555
3556	return (leaks);
3557}
3558
3559static boolean_t
3560zdb_leak_fini(spa_t *spa, zdb_cb_t *zcb)
3561{
3562	boolean_t leaks = B_FALSE;
3563	if (!dump_opt['L']) {
3564		vdev_t *rvd = spa->spa_root_vdev;
3565		for (unsigned c = 0; c < rvd->vdev_children; c++) {
3566			vdev_t *vd = rvd->vdev_child[c];
3567			metaslab_group_t *mg = vd->vdev_mg;
3568
3569			if (zcb->zcb_vd_obsolete_counts[c] != NULL) {
3570				leaks |= zdb_check_for_obsolete_leaks(vd, zcb);
3571			}
3572
3573			for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3574				metaslab_t *msp = vd->vdev_ms[m];
3575				ASSERT3P(mg, ==, msp->ms_group);
3576
3577				/*
3578				 * ms_allocatable has been overloaded
3579				 * to contain allocated segments. Now that
3580				 * we finished traversing all blocks, any
3581				 * block that remains in the ms_allocatable
3582				 * represents an allocated block that we
3583				 * did not claim during the traversal.
3584				 * Claimed blocks would have been removed
3585				 * from the ms_allocatable.  For indirect
3586				 * vdevs, space remaining in the tree
3587				 * represents parts of the mapping that are
3588				 * not referenced, which is not a bug.
3589				 */
3590				if (vd->vdev_ops == &vdev_indirect_ops) {
3591					range_tree_vacate(msp->ms_allocatable,
3592					    NULL, NULL);
3593				} else {
3594					range_tree_vacate(msp->ms_allocatable,
3595					    zdb_leak, vd);
3596				}
3597
3598				if (msp->ms_loaded) {
3599					msp->ms_loaded = B_FALSE;
3600				}
3601			}
3602		}
3603
3604		umem_free(zcb->zcb_vd_obsolete_counts,
3605		    rvd->vdev_children * sizeof (uint32_t *));
3606		zcb->zcb_vd_obsolete_counts = NULL;
3607	}
3608	return (leaks);
3609}
3610
3611/* ARGSUSED */
3612static int
3613count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3614{
3615	zdb_cb_t *zcb = arg;
3616
3617	if (dump_opt['b'] >= 5) {
3618		char blkbuf[BP_SPRINTF_LEN];
3619		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3620		(void) printf("[%s] %s\n",
3621		    "deferred free", blkbuf);
3622	}
3623	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
3624	return (0);
3625}
3626
3627static int
3628dump_block_stats(spa_t *spa)
3629{
3630	zdb_cb_t zcb;
3631	zdb_blkstats_t *zb, *tzb;
3632	uint64_t norm_alloc, norm_space, total_alloc, total_found;
3633	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
3634	boolean_t leaks = B_FALSE;
3635
3636	bzero(&zcb, sizeof (zcb));
3637	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
3638	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
3639	    (dump_opt['c'] == 1) ? "metadata " : "",
3640	    dump_opt['c'] ? "checksums " : "",
3641	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
3642	    !dump_opt['L'] ? "nothing leaked " : "");
3643
3644	/*
3645	 * Load all space maps as SM_ALLOC maps, then traverse the pool
3646	 * claiming each block we discover.  If the pool is perfectly
3647	 * consistent, the space maps will be empty when we're done.
3648	 * Anything left over is a leak; any block we can't claim (because
3649	 * it's not part of any space map) is a double allocation,
3650	 * reference to a freed block, or an unclaimed log block.
3651	 */
3652	zdb_leak_init(spa, &zcb);
3653
3654	/*
3655	 * If there's a deferred-free bplist, process that first.
3656	 */
3657	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
3658	    count_block_cb, &zcb, NULL);
3659
3660	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
3661		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
3662		    count_block_cb, &zcb, NULL);
3663	}
3664
3665	zdb_claim_removing(spa, &zcb);
3666
3667	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
3668		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
3669		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
3670		    &zcb, NULL));
3671	}
3672
3673	if (dump_opt['c'] > 1)
3674		flags |= TRAVERSE_PREFETCH_DATA;
3675
3676	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
3677	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
3678	zcb.zcb_haderrors |= traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
3679
3680	/*
3681	 * If we've traversed the data blocks then we need to wait for those
3682	 * I/Os to complete. We leverage "The Godfather" zio to wait on
3683	 * all async I/Os to complete.
3684	 */
3685	if (dump_opt['c']) {
3686		for (int i = 0; i < max_ncpus; i++) {
3687			(void) zio_wait(spa->spa_async_zio_root[i]);
3688			spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
3689			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
3690			    ZIO_FLAG_GODFATHER);
3691		}
3692	}
3693
3694	if (zcb.zcb_haderrors) {
3695		(void) printf("\nError counts:\n\n");
3696		(void) printf("\t%5s  %s\n", "errno", "count");
3697		for (int e = 0; e < 256; e++) {
3698			if (zcb.zcb_errors[e] != 0) {
3699				(void) printf("\t%5d  %llu\n",
3700				    e, (u_longlong_t)zcb.zcb_errors[e]);
3701			}
3702		}
3703	}
3704
3705	/*
3706	 * Report any leaked segments.
3707	 */
3708	leaks |= zdb_leak_fini(spa, &zcb);
3709
3710	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
3711
3712	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
3713	norm_space = metaslab_class_get_space(spa_normal_class(spa));
3714
3715	total_alloc = norm_alloc + metaslab_class_get_alloc(spa_log_class(spa));
3716	total_found = tzb->zb_asize - zcb.zcb_dedup_asize +
3717	    zcb.zcb_removing_size + zcb.zcb_checkpoint_size;
3718
3719	if (total_found == total_alloc) {
3720		if (!dump_opt['L'])
3721			(void) printf("\n\tNo leaks (block sum matches space"
3722			    " maps exactly)\n");
3723	} else {
3724		(void) printf("block traversal size %llu != alloc %llu "
3725		    "(%s %lld)\n",
3726		    (u_longlong_t)total_found,
3727		    (u_longlong_t)total_alloc,
3728		    (dump_opt['L']) ? "unreachable" : "leaked",
3729		    (longlong_t)(total_alloc - total_found));
3730		leaks = B_TRUE;
3731	}
3732
3733	if (tzb->zb_count == 0)
3734		return (2);
3735
3736	(void) printf("\n");
3737	(void) printf("\tbp count:      %10llu\n",
3738	    (u_longlong_t)tzb->zb_count);
3739	(void) printf("\tganged count:  %10llu\n",
3740	    (longlong_t)tzb->zb_gangs);
3741	(void) printf("\tbp logical:    %10llu      avg: %6llu\n",
3742	    (u_longlong_t)tzb->zb_lsize,
3743	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
3744	(void) printf("\tbp physical:   %10llu      avg:"
3745	    " %6llu     compression: %6.2f\n",
3746	    (u_longlong_t)tzb->zb_psize,
3747	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
3748	    (double)tzb->zb_lsize / tzb->zb_psize);
3749	(void) printf("\tbp allocated:  %10llu      avg:"
3750	    " %6llu     compression: %6.2f\n",
3751	    (u_longlong_t)tzb->zb_asize,
3752	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
3753	    (double)tzb->zb_lsize / tzb->zb_asize);
3754	(void) printf("\tbp deduped:    %10llu    ref>1:"
3755	    " %6llu   deduplication: %6.2f\n",
3756	    (u_longlong_t)zcb.zcb_dedup_asize,
3757	    (u_longlong_t)zcb.zcb_dedup_blocks,
3758	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
3759	(void) printf("\tSPA allocated: %10llu     used: %5.2f%%\n",
3760	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
3761
3762	for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
3763		if (zcb.zcb_embedded_blocks[i] == 0)
3764			continue;
3765		(void) printf("\n");
3766		(void) printf("\tadditional, non-pointer bps of type %u: "
3767		    "%10llu\n",
3768		    i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
3769
3770		if (dump_opt['b'] >= 3) {
3771			(void) printf("\t number of (compressed) bytes:  "
3772			    "number of bps\n");
3773			dump_histogram(zcb.zcb_embedded_histogram[i],
3774			    sizeof (zcb.zcb_embedded_histogram[i]) /
3775			    sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
3776		}
3777	}
3778
3779	if (tzb->zb_ditto_samevdev != 0) {
3780		(void) printf("\tDittoed blocks on same vdev: %llu\n",
3781		    (longlong_t)tzb->zb_ditto_samevdev);
3782	}
3783
3784	for (uint64_t v = 0; v < spa->spa_root_vdev->vdev_children; v++) {
3785		vdev_t *vd = spa->spa_root_vdev->vdev_child[v];
3786		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3787
3788		if (vim == NULL) {
3789			continue;
3790		}
3791
3792		char mem[32];
3793		zdb_nicenum(vdev_indirect_mapping_num_entries(vim),
3794		    mem, vdev_indirect_mapping_size(vim));
3795
3796		(void) printf("\tindirect vdev id %llu has %llu segments "
3797		    "(%s in memory)\n",
3798		    (longlong_t)vd->vdev_id,
3799		    (longlong_t)vdev_indirect_mapping_num_entries(vim), mem);
3800	}
3801
3802	if (dump_opt['b'] >= 2) {
3803		int l, t, level;
3804		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
3805		    "\t  avg\t comp\t%%Total\tType\n");
3806
3807		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
3808			char csize[32], lsize[32], psize[32], asize[32];
3809			char avg[32], gang[32];
3810			const char *typename;
3811
3812			/* make sure nicenum has enough space */
3813			CTASSERT(sizeof (csize) >= NN_NUMBUF_SZ);
3814			CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
3815			CTASSERT(sizeof (psize) >= NN_NUMBUF_SZ);
3816			CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
3817			CTASSERT(sizeof (avg) >= NN_NUMBUF_SZ);
3818			CTASSERT(sizeof (gang) >= NN_NUMBUF_SZ);
3819
3820			if (t < DMU_OT_NUMTYPES)
3821				typename = dmu_ot[t].ot_name;
3822			else
3823				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
3824
3825			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
3826				(void) printf("%6s\t%5s\t%5s\t%5s"
3827				    "\t%5s\t%5s\t%6s\t%s\n",
3828				    "-",
3829				    "-",
3830				    "-",
3831				    "-",
3832				    "-",
3833				    "-",
3834				    "-",
3835				    typename);
3836				continue;
3837			}
3838
3839			for (l = ZB_TOTAL - 1; l >= -1; l--) {
3840				level = (l == -1 ? ZB_TOTAL : l);
3841				zb = &zcb.zcb_type[level][t];
3842
3843				if (zb->zb_asize == 0)
3844					continue;
3845
3846				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
3847					continue;
3848
3849				if (level == 0 && zb->zb_asize ==
3850				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
3851					continue;
3852
3853				zdb_nicenum(zb->zb_count, csize,
3854				    sizeof (csize));
3855				zdb_nicenum(zb->zb_lsize, lsize,
3856				    sizeof (lsize));
3857				zdb_nicenum(zb->zb_psize, psize,
3858				    sizeof (psize));
3859				zdb_nicenum(zb->zb_asize, asize,
3860				    sizeof (asize));
3861				zdb_nicenum(zb->zb_asize / zb->zb_count, avg,
3862				    sizeof (avg));
3863				zdb_nicenum(zb->zb_gangs, gang, sizeof (gang));
3864
3865				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
3866				    "\t%5.2f\t%6.2f\t",
3867				    csize, lsize, psize, asize, avg,
3868				    (double)zb->zb_lsize / zb->zb_psize,
3869				    100.0 * zb->zb_asize / tzb->zb_asize);
3870
3871				if (level == ZB_TOTAL)
3872					(void) printf("%s\n", typename);
3873				else
3874					(void) printf("    L%d %s\n",
3875					    level, typename);
3876
3877				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
3878					(void) printf("\t number of ganged "
3879					    "blocks: %s\n", gang);
3880				}
3881
3882				if (dump_opt['b'] >= 4) {
3883					(void) printf("psize "
3884					    "(in 512-byte sectors): "
3885					    "number of blocks\n");
3886					dump_histogram(zb->zb_psize_histogram,
3887					    PSIZE_HISTO_SIZE, 0);
3888				}
3889			}
3890		}
3891	}
3892
3893	(void) printf("\n");
3894
3895	if (leaks)
3896		return (2);
3897
3898	if (zcb.zcb_haderrors)
3899		return (3);
3900
3901	return (0);
3902}
3903
3904typedef struct zdb_ddt_entry {
3905	ddt_key_t	zdde_key;
3906	uint64_t	zdde_ref_blocks;
3907	uint64_t	zdde_ref_lsize;
3908	uint64_t	zdde_ref_psize;
3909	uint64_t	zdde_ref_dsize;
3910	avl_node_t	zdde_node;
3911} zdb_ddt_entry_t;
3912
3913/* ARGSUSED */
3914static int
3915zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
3916    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
3917{
3918	avl_tree_t *t = arg;
3919	avl_index_t where;
3920	zdb_ddt_entry_t *zdde, zdde_search;
3921
3922	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
3923		return (0);
3924
3925	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
3926		(void) printf("traversing objset %llu, %llu objects, "
3927		    "%lu blocks so far\n",
3928		    (u_longlong_t)zb->zb_objset,
3929		    (u_longlong_t)BP_GET_FILL(bp),
3930		    avl_numnodes(t));
3931	}
3932
3933	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
3934	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
3935		return (0);
3936
3937	ddt_key_fill(&zdde_search.zdde_key, bp);
3938
3939	zdde = avl_find(t, &zdde_search, &where);
3940
3941	if (zdde == NULL) {
3942		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
3943		zdde->zdde_key = zdde_search.zdde_key;
3944		avl_insert(t, zdde, where);
3945	}
3946
3947	zdde->zdde_ref_blocks += 1;
3948	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
3949	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
3950	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
3951
3952	return (0);
3953}
3954
3955static void
3956dump_simulated_ddt(spa_t *spa)
3957{
3958	avl_tree_t t;
3959	void *cookie = NULL;
3960	zdb_ddt_entry_t *zdde;
3961	ddt_histogram_t ddh_total;
3962	ddt_stat_t dds_total;
3963
3964	bzero(&ddh_total, sizeof (ddh_total));
3965	bzero(&dds_total, sizeof (dds_total));
3966	avl_create(&t, ddt_entry_compare,
3967	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
3968
3969	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3970
3971	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
3972	    zdb_ddt_add_cb, &t);
3973
3974	spa_config_exit(spa, SCL_CONFIG, FTAG);
3975
3976	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
3977		ddt_stat_t dds;
3978		uint64_t refcnt = zdde->zdde_ref_blocks;
3979		ASSERT(refcnt != 0);
3980
3981		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
3982		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
3983		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
3984		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
3985
3986		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
3987		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
3988		dds.dds_ref_psize = zdde->zdde_ref_psize;
3989		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
3990
3991		ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
3992		    &dds, 0);
3993
3994		umem_free(zdde, sizeof (*zdde));
3995	}
3996
3997	avl_destroy(&t);
3998
3999	ddt_histogram_stat(&dds_total, &ddh_total);
4000
4001	(void) printf("Simulated DDT histogram:\n");
4002
4003	zpool_dump_ddt(&dds_total, &ddh_total);
4004
4005	dump_dedup_ratio(&dds_total);
4006}
4007
4008static int
4009verify_device_removal_feature_counts(spa_t *spa)
4010{
4011	uint64_t dr_feature_refcount = 0;
4012	uint64_t oc_feature_refcount = 0;
4013	uint64_t indirect_vdev_count = 0;
4014	uint64_t precise_vdev_count = 0;
4015	uint64_t obsolete_counts_object_count = 0;
4016	uint64_t obsolete_sm_count = 0;
4017	uint64_t obsolete_counts_count = 0;
4018	uint64_t scip_count = 0;
4019	uint64_t obsolete_bpobj_count = 0;
4020	int ret = 0;
4021
4022	spa_condensing_indirect_phys_t *scip =
4023	    &spa->spa_condensing_indirect_phys;
4024	if (scip->scip_next_mapping_object != 0) {
4025		vdev_t *vd = spa->spa_root_vdev->vdev_child[scip->scip_vdev];
4026		ASSERT(scip->scip_prev_obsolete_sm_object != 0);
4027		ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops);
4028
4029		(void) printf("Condensing indirect vdev %llu: new mapping "
4030		    "object %llu, prev obsolete sm %llu\n",
4031		    (u_longlong_t)scip->scip_vdev,
4032		    (u_longlong_t)scip->scip_next_mapping_object,
4033		    (u_longlong_t)scip->scip_prev_obsolete_sm_object);
4034		if (scip->scip_prev_obsolete_sm_object != 0) {
4035			space_map_t *prev_obsolete_sm = NULL;
4036			VERIFY0(space_map_open(&prev_obsolete_sm,
4037			    spa->spa_meta_objset,
4038			    scip->scip_prev_obsolete_sm_object,
4039			    0, vd->vdev_asize, 0));
4040			space_map_update(prev_obsolete_sm);
4041			dump_spacemap(spa->spa_meta_objset, prev_obsolete_sm);
4042			(void) printf("\n");
4043			space_map_close(prev_obsolete_sm);
4044		}
4045
4046		scip_count += 2;
4047	}
4048
4049	for (uint64_t i = 0; i < spa->spa_root_vdev->vdev_children; i++) {
4050		vdev_t *vd = spa->spa_root_vdev->vdev_child[i];
4051		vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
4052
4053		if (vic->vic_mapping_object != 0) {
4054			ASSERT(vd->vdev_ops == &vdev_indirect_ops ||
4055			    vd->vdev_removing);
4056			indirect_vdev_count++;
4057
4058			if (vd->vdev_indirect_mapping->vim_havecounts) {
4059				obsolete_counts_count++;
4060			}
4061		}
4062		if (vdev_obsolete_counts_are_precise(vd)) {
4063			ASSERT(vic->vic_mapping_object != 0);
4064			precise_vdev_count++;
4065		}
4066		if (vdev_obsolete_sm_object(vd) != 0) {
4067			ASSERT(vic->vic_mapping_object != 0);
4068			obsolete_sm_count++;
4069		}
4070	}
4071
4072	(void) feature_get_refcount(spa,
4073	    &spa_feature_table[SPA_FEATURE_DEVICE_REMOVAL],
4074	    &dr_feature_refcount);
4075	(void) feature_get_refcount(spa,
4076	    &spa_feature_table[SPA_FEATURE_OBSOLETE_COUNTS],
4077	    &oc_feature_refcount);
4078
4079	if (dr_feature_refcount != indirect_vdev_count) {
4080		ret = 1;
4081		(void) printf("Number of indirect vdevs (%llu) " \
4082		    "does not match feature count (%llu)\n",
4083		    (u_longlong_t)indirect_vdev_count,
4084		    (u_longlong_t)dr_feature_refcount);
4085	} else {
4086		(void) printf("Verified device_removal feature refcount " \
4087		    "of %llu is correct\n",
4088		    (u_longlong_t)dr_feature_refcount);
4089	}
4090
4091	if (zap_contains(spa_meta_objset(spa), DMU_POOL_DIRECTORY_OBJECT,
4092	    DMU_POOL_OBSOLETE_BPOBJ) == 0) {
4093		obsolete_bpobj_count++;
4094	}
4095
4096
4097	obsolete_counts_object_count = precise_vdev_count;
4098	obsolete_counts_object_count += obsolete_sm_count;
4099	obsolete_counts_object_count += obsolete_counts_count;
4100	obsolete_counts_object_count += scip_count;
4101	obsolete_counts_object_count += obsolete_bpobj_count;
4102	obsolete_counts_object_count += remap_deadlist_count;
4103
4104	if (oc_feature_refcount != obsolete_counts_object_count) {
4105		ret = 1;
4106		(void) printf("Number of obsolete counts objects (%llu) " \
4107		    "does not match feature count (%llu)\n",
4108		    (u_longlong_t)obsolete_counts_object_count,
4109		    (u_longlong_t)oc_feature_refcount);
4110		(void) printf("pv:%llu os:%llu oc:%llu sc:%llu "
4111		    "ob:%llu rd:%llu\n",
4112		    (u_longlong_t)precise_vdev_count,
4113		    (u_longlong_t)obsolete_sm_count,
4114		    (u_longlong_t)obsolete_counts_count,
4115		    (u_longlong_t)scip_count,
4116		    (u_longlong_t)obsolete_bpobj_count,
4117		    (u_longlong_t)remap_deadlist_count);
4118	} else {
4119		(void) printf("Verified indirect_refcount feature refcount " \
4120		    "of %llu is correct\n",
4121		    (u_longlong_t)oc_feature_refcount);
4122	}
4123	return (ret);
4124}
4125
4126#define	BOGUS_SUFFIX "_CHECKPOINTED_UNIVERSE"
4127/*
4128 * Import the checkpointed state of the pool specified by the target
4129 * parameter as readonly. The function also accepts a pool config
4130 * as an optional parameter, else it attempts to infer the config by
4131 * the name of the target pool.
4132 *
4133 * Note that the checkpointed state's pool name will be the name of
4134 * the original pool with the above suffix appened to it. In addition,
4135 * if the target is not a pool name (e.g. a path to a dataset) then
4136 * the new_path parameter is populated with the updated path to
4137 * reflect the fact that we are looking into the checkpointed state.
4138 *
4139 * The function returns a newly-allocated copy of the name of the
4140 * pool containing the checkpointed state. When this copy is no
4141 * longer needed it should be freed with free(3C). Same thing
4142 * applies to the new_path parameter if allocated.
4143 */
4144static char *
4145import_checkpointed_state(char *target, nvlist_t *cfg, char **new_path)
4146{
4147	int error = 0;
4148	char *poolname, *bogus_name;
4149
4150	/* If the target is not a pool, the extract the pool name */
4151	char *path_start = strchr(target, '/');
4152	if (path_start != NULL) {
4153		size_t poolname_len = path_start - target;
4154		poolname = strndup(target, poolname_len);
4155	} else {
4156		poolname = target;
4157	}
4158
4159	if (cfg == NULL) {
4160		error = spa_get_stats(poolname, &cfg, NULL, 0);
4161		if (error != 0) {
4162			fatal("Tried to read config of pool \"%s\" but "
4163			    "spa_get_stats() failed with error %d\n",
4164			    poolname, error);
4165		}
4166	}
4167
4168	(void) asprintf(&bogus_name, "%s%s", poolname, BOGUS_SUFFIX);
4169	fnvlist_add_string(cfg, ZPOOL_CONFIG_POOL_NAME, bogus_name);
4170
4171	error = spa_import(bogus_name, cfg, NULL,
4172	    ZFS_IMPORT_MISSING_LOG | ZFS_IMPORT_CHECKPOINT);
4173	if (error != 0) {
4174		fatal("Tried to import pool \"%s\" but spa_import() failed "
4175		    "with error %d\n", bogus_name, error);
4176	}
4177
4178	if (new_path != NULL && path_start != NULL)
4179		(void) asprintf(new_path, "%s%s", bogus_name, path_start);
4180
4181	if (target != poolname)
4182		free(poolname);
4183
4184	return (bogus_name);
4185}
4186
4187typedef struct verify_checkpoint_sm_entry_cb_arg {
4188	vdev_t *vcsec_vd;
4189
4190	/* the following fields are only used for printing progress */
4191	uint64_t vcsec_entryid;
4192	uint64_t vcsec_num_entries;
4193} verify_checkpoint_sm_entry_cb_arg_t;
4194
4195#define	ENTRIES_PER_PROGRESS_UPDATE 10000
4196
4197static int
4198verify_checkpoint_sm_entry_cb(space_map_entry_t *sme, void *arg)
4199{
4200	verify_checkpoint_sm_entry_cb_arg_t *vcsec = arg;
4201	vdev_t *vd = vcsec->vcsec_vd;
4202	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
4203	uint64_t end = sme->sme_offset + sme->sme_run;
4204
4205	ASSERT(sme->sme_type == SM_FREE);
4206
4207	if ((vcsec->vcsec_entryid % ENTRIES_PER_PROGRESS_UPDATE) == 0) {
4208		(void) fprintf(stderr,
4209		    "\rverifying vdev %llu, space map entry %llu of %llu ...",
4210		    (longlong_t)vd->vdev_id,
4211		    (longlong_t)vcsec->vcsec_entryid,
4212		    (longlong_t)vcsec->vcsec_num_entries);
4213	}
4214	vcsec->vcsec_entryid++;
4215
4216	/*
4217	 * See comment in checkpoint_sm_exclude_entry_cb()
4218	 */
4219	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
4220	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
4221
4222	/*
4223	 * The entries in the vdev_checkpoint_sm should be marked as
4224	 * allocated in the checkpointed state of the pool, therefore
4225	 * their respective ms_allocateable trees should not contain them.
4226	 */
4227	mutex_enter(&ms->ms_lock);
4228	range_tree_verify(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
4229	mutex_exit(&ms->ms_lock);
4230
4231	return (0);
4232}
4233
4234/*
4235 * Verify that all segments in the vdev_checkpoint_sm are allocated
4236 * according to the checkpoint's ms_sm (i.e. are not in the checkpoint's
4237 * ms_allocatable).
4238 *
4239 * Do so by comparing the checkpoint space maps (vdev_checkpoint_sm) of
4240 * each vdev in the current state of the pool to the metaslab space maps
4241 * (ms_sm) of the checkpointed state of the pool.
4242 *
4243 * Note that the function changes the state of the ms_allocatable
4244 * trees of the current spa_t. The entries of these ms_allocatable
4245 * trees are cleared out and then repopulated from with the free
4246 * entries of their respective ms_sm space maps.
4247 */
4248static void
4249verify_checkpoint_vdev_spacemaps(spa_t *checkpoint, spa_t *current)
4250{
4251	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4252	vdev_t *current_rvd = current->spa_root_vdev;
4253
4254	load_concrete_ms_allocatable_trees(checkpoint, SM_FREE);
4255
4256	for (uint64_t c = 0; c < ckpoint_rvd->vdev_children; c++) {
4257		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[c];
4258		vdev_t *current_vd = current_rvd->vdev_child[c];
4259
4260		space_map_t *checkpoint_sm = NULL;
4261		uint64_t checkpoint_sm_obj;
4262
4263		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4264			/*
4265			 * Since we don't allow device removal in a pool
4266			 * that has a checkpoint, we expect that all removed
4267			 * vdevs were removed from the pool before the
4268			 * checkpoint.
4269			 */
4270			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4271			continue;
4272		}
4273
4274		/*
4275		 * If the checkpoint space map doesn't exist, then nothing
4276		 * here is checkpointed so there's nothing to verify.
4277		 */
4278		if (current_vd->vdev_top_zap == 0 ||
4279		    zap_contains(spa_meta_objset(current),
4280		    current_vd->vdev_top_zap,
4281		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4282			continue;
4283
4284		VERIFY0(zap_lookup(spa_meta_objset(current),
4285		    current_vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4286		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4287
4288		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(current),
4289		    checkpoint_sm_obj, 0, current_vd->vdev_asize,
4290		    current_vd->vdev_ashift));
4291		space_map_update(checkpoint_sm);
4292
4293		verify_checkpoint_sm_entry_cb_arg_t vcsec;
4294		vcsec.vcsec_vd = ckpoint_vd;
4295		vcsec.vcsec_entryid = 0;
4296		vcsec.vcsec_num_entries =
4297		    space_map_length(checkpoint_sm) / sizeof (uint64_t);
4298		VERIFY0(space_map_iterate(checkpoint_sm,
4299		    verify_checkpoint_sm_entry_cb, &vcsec));
4300		dump_spacemap(current->spa_meta_objset, checkpoint_sm);
4301		space_map_close(checkpoint_sm);
4302	}
4303
4304	/*
4305	 * If we've added vdevs since we took the checkpoint, ensure
4306	 * that their checkpoint space maps are empty.
4307	 */
4308	if (ckpoint_rvd->vdev_children < current_rvd->vdev_children) {
4309		for (uint64_t c = ckpoint_rvd->vdev_children;
4310		    c < current_rvd->vdev_children; c++) {
4311			vdev_t *current_vd = current_rvd->vdev_child[c];
4312			ASSERT3P(current_vd->vdev_checkpoint_sm, ==, NULL);
4313		}
4314	}
4315
4316	/* for cleaner progress output */
4317	(void) fprintf(stderr, "\n");
4318}
4319
4320/*
4321 * Verifies that all space that's allocated in the checkpoint is
4322 * still allocated in the current version, by checking that everything
4323 * in checkpoint's ms_allocatable (which is actually allocated, not
4324 * allocatable/free) is not present in current's ms_allocatable.
4325 *
4326 * Note that the function changes the state of the ms_allocatable
4327 * trees of both spas when called. The entries of all ms_allocatable
4328 * trees are cleared out and then repopulated from their respective
4329 * ms_sm space maps. In the checkpointed state we load the allocated
4330 * entries, and in the current state we load the free entries.
4331 */
4332static void
4333verify_checkpoint_ms_spacemaps(spa_t *checkpoint, spa_t *current)
4334{
4335	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4336	vdev_t *current_rvd = current->spa_root_vdev;
4337
4338	load_concrete_ms_allocatable_trees(checkpoint, SM_ALLOC);
4339	load_concrete_ms_allocatable_trees(current, SM_FREE);
4340
4341	for (uint64_t i = 0; i < ckpoint_rvd->vdev_children; i++) {
4342		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[i];
4343		vdev_t *current_vd = current_rvd->vdev_child[i];
4344
4345		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4346			/*
4347			 * See comment in verify_checkpoint_vdev_spacemaps()
4348			 */
4349			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4350			continue;
4351		}
4352
4353		for (uint64_t m = 0; m < ckpoint_vd->vdev_ms_count; m++) {
4354			metaslab_t *ckpoint_msp = ckpoint_vd->vdev_ms[m];
4355			metaslab_t *current_msp = current_vd->vdev_ms[m];
4356
4357			(void) fprintf(stderr,
4358			    "\rverifying vdev %llu of %llu, "
4359			    "metaslab %llu of %llu ...",
4360			    (longlong_t)current_vd->vdev_id,
4361			    (longlong_t)current_rvd->vdev_children,
4362			    (longlong_t)current_vd->vdev_ms[m]->ms_id,
4363			    (longlong_t)current_vd->vdev_ms_count);
4364
4365			/*
4366			 * We walk through the ms_allocatable trees that
4367			 * are loaded with the allocated blocks from the
4368			 * ms_sm spacemaps of the checkpoint. For each
4369			 * one of these ranges we ensure that none of them
4370			 * exists in the ms_allocatable trees of the
4371			 * current state which are loaded with the ranges
4372			 * that are currently free.
4373			 *
4374			 * This way we ensure that none of the blocks that
4375			 * are part of the checkpoint were freed by mistake.
4376			 */
4377			range_tree_walk(ckpoint_msp->ms_allocatable,
4378			    (range_tree_func_t *)range_tree_verify,
4379			    current_msp->ms_allocatable);
4380		}
4381	}
4382
4383	/* for cleaner progress output */
4384	(void) fprintf(stderr, "\n");
4385}
4386
4387static void
4388verify_checkpoint_blocks(spa_t *spa)
4389{
4390	spa_t *checkpoint_spa;
4391	char *checkpoint_pool;
4392	nvlist_t *config = NULL;
4393	int error = 0;
4394
4395	/*
4396	 * We import the checkpointed state of the pool (under a different
4397	 * name) so we can do verification on it against the current state
4398	 * of the pool.
4399	 */
4400	checkpoint_pool = import_checkpointed_state(spa->spa_name, config,
4401	    NULL);
4402	ASSERT(strcmp(spa->spa_name, checkpoint_pool) != 0);
4403
4404	error = spa_open(checkpoint_pool, &checkpoint_spa, FTAG);
4405	if (error != 0) {
4406		fatal("Tried to open pool \"%s\" but spa_open() failed with "
4407		    "error %d\n", checkpoint_pool, error);
4408	}
4409
4410	/*
4411	 * Ensure that ranges in the checkpoint space maps of each vdev
4412	 * are allocated according to the checkpointed state's metaslab
4413	 * space maps.
4414	 */
4415	verify_checkpoint_vdev_spacemaps(checkpoint_spa, spa);
4416
4417	/*
4418	 * Ensure that allocated ranges in the checkpoint's metaslab
4419	 * space maps remain allocated in the metaslab space maps of
4420	 * the current state.
4421	 */
4422	verify_checkpoint_ms_spacemaps(checkpoint_spa, spa);
4423
4424	/*
4425	 * Once we are done, we get rid of the checkpointed state.
4426	 */
4427	spa_close(checkpoint_spa, FTAG);
4428	free(checkpoint_pool);
4429}
4430
4431static void
4432dump_leftover_checkpoint_blocks(spa_t *spa)
4433{
4434	vdev_t *rvd = spa->spa_root_vdev;
4435
4436	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
4437		vdev_t *vd = rvd->vdev_child[i];
4438
4439		space_map_t *checkpoint_sm = NULL;
4440		uint64_t checkpoint_sm_obj;
4441
4442		if (vd->vdev_top_zap == 0)
4443			continue;
4444
4445		if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
4446		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4447			continue;
4448
4449		VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
4450		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4451		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4452
4453		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
4454		    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
4455		space_map_update(checkpoint_sm);
4456		dump_spacemap(spa->spa_meta_objset, checkpoint_sm);
4457		space_map_close(checkpoint_sm);
4458	}
4459}
4460
4461static int
4462verify_checkpoint(spa_t *spa)
4463{
4464	uberblock_t checkpoint;
4465	int error;
4466
4467	if (!spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT))
4468		return (0);
4469
4470	error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
4471	    DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t),
4472	    sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint);
4473
4474	if (error == ENOENT && !dump_opt['L']) {
4475		/*
4476		 * If the feature is active but the uberblock is missing
4477		 * then we must be in the middle of discarding the
4478		 * checkpoint.
4479		 */
4480		(void) printf("\nPartially discarded checkpoint "
4481		    "state found:\n");
4482		dump_leftover_checkpoint_blocks(spa);
4483		return (0);
4484	} else if (error != 0) {
4485		(void) printf("lookup error %d when looking for "
4486		    "checkpointed uberblock in MOS\n", error);
4487		return (error);
4488	}
4489	dump_uberblock(&checkpoint, "\nCheckpointed uberblock found:\n", "\n");
4490
4491	if (checkpoint.ub_checkpoint_txg == 0) {
4492		(void) printf("\nub_checkpoint_txg not set in checkpointed "
4493		    "uberblock\n");
4494		error = 3;
4495	}
4496
4497	if (error == 0 && !dump_opt['L'])
4498		verify_checkpoint_blocks(spa);
4499
4500	return (error);
4501}
4502
4503/* ARGSUSED */
4504static void
4505mos_leaks_cb(void *arg, uint64_t start, uint64_t size)
4506{
4507	for (uint64_t i = start; i < size; i++) {
4508		(void) printf("MOS object %llu referenced but not allocated\n",
4509		    (u_longlong_t)i);
4510	}
4511}
4512
4513static range_tree_t *mos_refd_objs;
4514
4515static void
4516mos_obj_refd(uint64_t obj)
4517{
4518	if (obj != 0 && mos_refd_objs != NULL)
4519		range_tree_add(mos_refd_objs, obj, 1);
4520}
4521
4522static void
4523mos_leak_vdev(vdev_t *vd)
4524{
4525	mos_obj_refd(vd->vdev_dtl_object);
4526	mos_obj_refd(vd->vdev_ms_array);
4527	mos_obj_refd(vd->vdev_top_zap);
4528	mos_obj_refd(vd->vdev_indirect_config.vic_births_object);
4529	mos_obj_refd(vd->vdev_indirect_config.vic_mapping_object);
4530	mos_obj_refd(vd->vdev_leaf_zap);
4531	if (vd->vdev_checkpoint_sm != NULL)
4532		mos_obj_refd(vd->vdev_checkpoint_sm->sm_object);
4533	if (vd->vdev_indirect_mapping != NULL) {
4534		mos_obj_refd(vd->vdev_indirect_mapping->
4535		    vim_phys->vimp_counts_object);
4536	}
4537	if (vd->vdev_obsolete_sm != NULL)
4538		mos_obj_refd(vd->vdev_obsolete_sm->sm_object);
4539
4540	for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
4541		metaslab_t *ms = vd->vdev_ms[m];
4542		mos_obj_refd(space_map_object(ms->ms_sm));
4543	}
4544
4545	for (uint64_t c = 0; c < vd->vdev_children; c++) {
4546		mos_leak_vdev(vd->vdev_child[c]);
4547	}
4548}
4549
4550static int
4551dump_mos_leaks(spa_t *spa)
4552{
4553	int rv = 0;
4554	objset_t *mos = spa->spa_meta_objset;
4555	dsl_pool_t *dp = spa->spa_dsl_pool;
4556
4557	/* Visit and mark all referenced objects in the MOS */
4558
4559	mos_obj_refd(DMU_POOL_DIRECTORY_OBJECT);
4560	mos_obj_refd(spa->spa_pool_props_object);
4561	mos_obj_refd(spa->spa_config_object);
4562	mos_obj_refd(spa->spa_ddt_stat_object);
4563	mos_obj_refd(spa->spa_feat_desc_obj);
4564	mos_obj_refd(spa->spa_feat_enabled_txg_obj);
4565	mos_obj_refd(spa->spa_feat_for_read_obj);
4566	mos_obj_refd(spa->spa_feat_for_write_obj);
4567	mos_obj_refd(spa->spa_history);
4568	mos_obj_refd(spa->spa_errlog_last);
4569	mos_obj_refd(spa->spa_errlog_scrub);
4570	mos_obj_refd(spa->spa_all_vdev_zaps);
4571	mos_obj_refd(spa->spa_dsl_pool->dp_bptree_obj);
4572	mos_obj_refd(spa->spa_dsl_pool->dp_tmp_userrefs_obj);
4573	mos_obj_refd(spa->spa_dsl_pool->dp_scan->scn_phys.scn_queue_obj);
4574	bpobj_count_refd(&spa->spa_deferred_bpobj);
4575	mos_obj_refd(dp->dp_empty_bpobj);
4576	bpobj_count_refd(&dp->dp_obsolete_bpobj);
4577	bpobj_count_refd(&dp->dp_free_bpobj);
4578	mos_obj_refd(spa->spa_l2cache.sav_object);
4579	mos_obj_refd(spa->spa_spares.sav_object);
4580
4581	mos_obj_refd(spa->spa_condensing_indirect_phys.
4582	    scip_next_mapping_object);
4583	mos_obj_refd(spa->spa_condensing_indirect_phys.
4584	    scip_prev_obsolete_sm_object);
4585	if (spa->spa_condensing_indirect_phys.scip_next_mapping_object != 0) {
4586		vdev_indirect_mapping_t *vim =
4587		    vdev_indirect_mapping_open(mos,
4588		    spa->spa_condensing_indirect_phys.scip_next_mapping_object);
4589		mos_obj_refd(vim->vim_phys->vimp_counts_object);
4590		vdev_indirect_mapping_close(vim);
4591	}
4592
4593	if (dp->dp_origin_snap != NULL) {
4594		dsl_dataset_t *ds;
4595
4596		dsl_pool_config_enter(dp, FTAG);
4597		VERIFY0(dsl_dataset_hold_obj(dp,
4598		    dsl_dataset_phys(dp->dp_origin_snap)->ds_next_snap_obj,
4599		    FTAG, &ds));
4600		count_ds_mos_objects(ds);
4601		dump_deadlist(&ds->ds_deadlist);
4602		dsl_dataset_rele(ds, FTAG);
4603		dsl_pool_config_exit(dp, FTAG);
4604
4605		count_ds_mos_objects(dp->dp_origin_snap);
4606		dump_deadlist(&dp->dp_origin_snap->ds_deadlist);
4607	}
4608	count_dir_mos_objects(dp->dp_mos_dir);
4609	if (dp->dp_free_dir != NULL)
4610		count_dir_mos_objects(dp->dp_free_dir);
4611	if (dp->dp_leak_dir != NULL)
4612		count_dir_mos_objects(dp->dp_leak_dir);
4613
4614	mos_leak_vdev(spa->spa_root_vdev);
4615
4616	for (uint64_t class = 0; class < DDT_CLASSES; class++) {
4617		for (uint64_t type = 0; type < DDT_TYPES; type++) {
4618			for (uint64_t cksum = 0;
4619			    cksum < ZIO_CHECKSUM_FUNCTIONS; cksum++) {
4620				ddt_t *ddt = spa->spa_ddt[cksum];
4621				mos_obj_refd(ddt->ddt_object[type][class]);
4622			}
4623		}
4624	}
4625
4626	/*
4627	 * Visit all allocated objects and make sure they are referenced.
4628	 */
4629	uint64_t object = 0;
4630	while (dmu_object_next(mos, &object, B_FALSE, 0) == 0) {
4631		if (range_tree_contains(mos_refd_objs, object, 1)) {
4632			range_tree_remove(mos_refd_objs, object, 1);
4633		} else {
4634			dmu_object_info_t doi;
4635			const char *name;
4636			dmu_object_info(mos, object, &doi);
4637			if (doi.doi_type & DMU_OT_NEWTYPE) {
4638				dmu_object_byteswap_t bswap =
4639				    DMU_OT_BYTESWAP(doi.doi_type);
4640				name = dmu_ot_byteswap[bswap].ob_name;
4641			} else {
4642				name = dmu_ot[doi.doi_type].ot_name;
4643			}
4644
4645			(void) printf("MOS object %llu (%s) leaked\n",
4646			    (u_longlong_t)object, name);
4647			rv = 2;
4648		}
4649	}
4650	(void) range_tree_walk(mos_refd_objs, mos_leaks_cb, NULL);
4651	if (!range_tree_is_empty(mos_refd_objs))
4652		rv = 2;
4653	range_tree_vacate(mos_refd_objs, NULL, NULL);
4654	range_tree_destroy(mos_refd_objs);
4655	return (rv);
4656}
4657
4658static void
4659dump_zpool(spa_t *spa)
4660{
4661	dsl_pool_t *dp = spa_get_dsl(spa);
4662	int rc = 0;
4663
4664	if (dump_opt['S']) {
4665		dump_simulated_ddt(spa);
4666		return;
4667	}
4668
4669	if (!dump_opt['e'] && dump_opt['C'] > 1) {
4670		(void) printf("\nCached configuration:\n");
4671		dump_nvlist(spa->spa_config, 8);
4672	}
4673
4674	if (dump_opt['C'])
4675		dump_config(spa);
4676
4677	if (dump_opt['u'])
4678		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
4679
4680	if (dump_opt['D'])
4681		dump_all_ddts(spa);
4682
4683	if (dump_opt['d'] > 2 || dump_opt['m'])
4684		dump_metaslabs(spa);
4685	if (dump_opt['M'])
4686		dump_metaslab_groups(spa);
4687
4688	if (dump_opt['d'] || dump_opt['i']) {
4689		mos_refd_objs = range_tree_create(NULL, NULL);
4690		dump_dir(dp->dp_meta_objset);
4691
4692		if (dump_opt['d'] >= 3) {
4693			dsl_pool_t *dp = spa->spa_dsl_pool;
4694			dump_full_bpobj(&spa->spa_deferred_bpobj,
4695			    "Deferred frees", 0);
4696			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
4697				dump_full_bpobj(&dp->dp_free_bpobj,
4698				    "Pool snapshot frees", 0);
4699			}
4700			if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
4701				ASSERT(spa_feature_is_enabled(spa,
4702				    SPA_FEATURE_DEVICE_REMOVAL));
4703				dump_full_bpobj(&dp->dp_obsolete_bpobj,
4704				    "Pool obsolete blocks", 0);
4705			}
4706
4707			if (spa_feature_is_active(spa,
4708			    SPA_FEATURE_ASYNC_DESTROY)) {
4709				dump_bptree(spa->spa_meta_objset,
4710				    dp->dp_bptree_obj,
4711				    "Pool dataset frees");
4712			}
4713			dump_dtl(spa->spa_root_vdev, 0);
4714		}
4715		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
4716		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
4717
4718		if (rc == 0 && !dump_opt['L'])
4719			rc = dump_mos_leaks(spa);
4720
4721		for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
4722			uint64_t refcount;
4723
4724			if (!(spa_feature_table[f].fi_flags &
4725			    ZFEATURE_FLAG_PER_DATASET) ||
4726			    !spa_feature_is_enabled(spa, f)) {
4727				ASSERT0(dataset_feature_count[f]);
4728				continue;
4729			}
4730			(void) feature_get_refcount(spa,
4731			    &spa_feature_table[f], &refcount);
4732			if (dataset_feature_count[f] != refcount) {
4733				(void) printf("%s feature refcount mismatch: "
4734				    "%lld datasets != %lld refcount\n",
4735				    spa_feature_table[f].fi_uname,
4736				    (longlong_t)dataset_feature_count[f],
4737				    (longlong_t)refcount);
4738				rc = 2;
4739			} else {
4740				(void) printf("Verified %s feature refcount "
4741				    "of %llu is correct\n",
4742				    spa_feature_table[f].fi_uname,
4743				    (longlong_t)refcount);
4744			}
4745		}
4746
4747		if (rc == 0) {
4748			rc = verify_device_removal_feature_counts(spa);
4749		}
4750	}
4751
4752	if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
4753		rc = dump_block_stats(spa);
4754
4755	if (rc == 0)
4756		rc = verify_spacemap_refcounts(spa);
4757
4758	if (dump_opt['s'])
4759		show_pool_stats(spa);
4760
4761	if (dump_opt['h'])
4762		dump_history(spa);
4763
4764	if (rc == 0)
4765		rc = verify_checkpoint(spa);
4766
4767	if (rc != 0) {
4768		dump_debug_buffer();
4769		exit(rc);
4770	}
4771}
4772
4773#define	ZDB_FLAG_CHECKSUM	0x0001
4774#define	ZDB_FLAG_DECOMPRESS	0x0002
4775#define	ZDB_FLAG_BSWAP		0x0004
4776#define	ZDB_FLAG_GBH		0x0008
4777#define	ZDB_FLAG_INDIRECT	0x0010
4778#define	ZDB_FLAG_PHYS		0x0020
4779#define	ZDB_FLAG_RAW		0x0040
4780#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
4781
4782static int flagbits[256];
4783
4784static void
4785zdb_print_blkptr(blkptr_t *bp, int flags)
4786{
4787	char blkbuf[BP_SPRINTF_LEN];
4788
4789	if (flags & ZDB_FLAG_BSWAP)
4790		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
4791
4792	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
4793	(void) printf("%s\n", blkbuf);
4794}
4795
4796static void
4797zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
4798{
4799	int i;
4800
4801	for (i = 0; i < nbps; i++)
4802		zdb_print_blkptr(&bp[i], flags);
4803}
4804
4805static void
4806zdb_dump_gbh(void *buf, int flags)
4807{
4808	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
4809}
4810
4811static void
4812zdb_dump_block_raw(void *buf, uint64_t size, int flags)
4813{
4814	if (flags & ZDB_FLAG_BSWAP)
4815		byteswap_uint64_array(buf, size);
4816	(void) write(1, buf, size);
4817}
4818
4819static void
4820zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
4821{
4822	uint64_t *d = (uint64_t *)buf;
4823	unsigned nwords = size / sizeof (uint64_t);
4824	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
4825	unsigned i, j;
4826	const char *hdr;
4827	char *c;
4828
4829
4830	if (do_bswap)
4831		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
4832	else
4833		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
4834
4835	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
4836
4837	for (i = 0; i < nwords; i += 2) {
4838		(void) printf("%06llx:  %016llx  %016llx  ",
4839		    (u_longlong_t)(i * sizeof (uint64_t)),
4840		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
4841		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
4842
4843		c = (char *)&d[i];
4844		for (j = 0; j < 2 * sizeof (uint64_t); j++)
4845			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
4846		(void) printf("\n");
4847	}
4848}
4849
4850/*
4851 * There are two acceptable formats:
4852 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
4853 *	child[.child]*    - For example: 0.1.1
4854 *
4855 * The second form can be used to specify arbitrary vdevs anywhere
4856 * in the heirarchy.  For example, in a pool with a mirror of
4857 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
4858 */
4859static vdev_t *
4860zdb_vdev_lookup(vdev_t *vdev, const char *path)
4861{
4862	char *s, *p, *q;
4863	unsigned i;
4864
4865	if (vdev == NULL)
4866		return (NULL);
4867
4868	/* First, assume the x.x.x.x format */
4869	i = strtoul(path, &s, 10);
4870	if (s == path || (s && *s != '.' && *s != '\0'))
4871		goto name;
4872	if (i >= vdev->vdev_children)
4873		return (NULL);
4874
4875	vdev = vdev->vdev_child[i];
4876	if (*s == '\0')
4877		return (vdev);
4878	return (zdb_vdev_lookup(vdev, s+1));
4879
4880name:
4881	for (i = 0; i < vdev->vdev_children; i++) {
4882		vdev_t *vc = vdev->vdev_child[i];
4883
4884		if (vc->vdev_path == NULL) {
4885			vc = zdb_vdev_lookup(vc, path);
4886			if (vc == NULL)
4887				continue;
4888			else
4889				return (vc);
4890		}
4891
4892		p = strrchr(vc->vdev_path, '/');
4893		p = p ? p + 1 : vc->vdev_path;
4894		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
4895
4896		if (strcmp(vc->vdev_path, path) == 0)
4897			return (vc);
4898		if (strcmp(p, path) == 0)
4899			return (vc);
4900		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
4901			return (vc);
4902	}
4903
4904	return (NULL);
4905}
4906
4907/* ARGSUSED */
4908static int
4909random_get_pseudo_bytes_cb(void *buf, size_t len, void *unused)
4910{
4911	return (random_get_pseudo_bytes(buf, len));
4912}
4913
4914/*
4915 * Read a block from a pool and print it out.  The syntax of the
4916 * block descriptor is:
4917 *
4918 *	pool:vdev_specifier:offset:size[:flags]
4919 *
4920 *	pool           - The name of the pool you wish to read from
4921 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
4922 *	offset         - offset, in hex, in bytes
4923 *	size           - Amount of data to read, in hex, in bytes
4924 *	flags          - A string of characters specifying options
4925 *		 b: Decode a blkptr at given offset within block
4926 *		*c: Calculate and display checksums
4927 *		 d: Decompress data before dumping
4928 *		 e: Byteswap data before dumping
4929 *		 g: Display data as a gang block header
4930 *		 i: Display as an indirect block
4931 *		 p: Do I/O to physical offset
4932 *		 r: Dump raw data to stdout
4933 *
4934 *              * = not yet implemented
4935 */
4936static void
4937zdb_read_block(char *thing, spa_t *spa)
4938{
4939	blkptr_t blk, *bp = &blk;
4940	dva_t *dva = bp->blk_dva;
4941	int flags = 0;
4942	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
4943	zio_t *zio;
4944	vdev_t *vd;
4945	abd_t *pabd;
4946	void *lbuf, *buf;
4947	const char *s, *vdev;
4948	char *p, *dup, *flagstr;
4949	int i, error;
4950
4951	dup = strdup(thing);
4952	s = strtok(dup, ":");
4953	vdev = s ? s : "";
4954	s = strtok(NULL, ":");
4955	offset = strtoull(s ? s : "", NULL, 16);
4956	s = strtok(NULL, ":");
4957	size = strtoull(s ? s : "", NULL, 16);
4958	s = strtok(NULL, ":");
4959	if (s)
4960		flagstr = strdup(s);
4961	else
4962		flagstr = strdup("");
4963
4964	s = NULL;
4965	if (size == 0)
4966		s = "size must not be zero";
4967	if (!IS_P2ALIGNED(size, DEV_BSIZE))
4968		s = "size must be a multiple of sector size";
4969	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
4970		s = "offset must be a multiple of sector size";
4971	if (s) {
4972		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
4973		free(dup);
4974		return;
4975	}
4976
4977	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
4978		for (i = 0; flagstr[i]; i++) {
4979			int bit = flagbits[(uchar_t)flagstr[i]];
4980
4981			if (bit == 0) {
4982				(void) printf("***Invalid flag: %c\n",
4983				    flagstr[i]);
4984				continue;
4985			}
4986			flags |= bit;
4987
4988			/* If it's not something with an argument, keep going */
4989			if ((bit & (ZDB_FLAG_CHECKSUM |
4990			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
4991				continue;
4992
4993			p = &flagstr[i + 1];
4994			if (bit == ZDB_FLAG_PRINT_BLKPTR)
4995				blkptr_offset = strtoull(p, &p, 16);
4996			if (*p != ':' && *p != '\0') {
4997				(void) printf("***Invalid flag arg: '%s'\n", s);
4998				free(dup);
4999				return;
5000			}
5001		}
5002	}
5003	free(flagstr);
5004
5005	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
5006	if (vd == NULL) {
5007		(void) printf("***Invalid vdev: %s\n", vdev);
5008		free(dup);
5009		return;
5010	} else {
5011		if (vd->vdev_path)
5012			(void) fprintf(stderr, "Found vdev: %s\n",
5013			    vd->vdev_path);
5014		else
5015			(void) fprintf(stderr, "Found vdev type: %s\n",
5016			    vd->vdev_ops->vdev_op_type);
5017	}
5018
5019	psize = size;
5020	lsize = size;
5021
5022	pabd = abd_alloc_linear(SPA_MAXBLOCKSIZE, B_FALSE);
5023	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5024
5025	BP_ZERO(bp);
5026
5027	DVA_SET_VDEV(&dva[0], vd->vdev_id);
5028	DVA_SET_OFFSET(&dva[0], offset);
5029	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
5030	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
5031
5032	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
5033
5034	BP_SET_LSIZE(bp, lsize);
5035	BP_SET_PSIZE(bp, psize);
5036	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
5037	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
5038	BP_SET_TYPE(bp, DMU_OT_NONE);
5039	BP_SET_LEVEL(bp, 0);
5040	BP_SET_DEDUP(bp, 0);
5041	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
5042
5043	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
5044	zio = zio_root(spa, NULL, NULL, 0);
5045
5046	if (vd == vd->vdev_top) {
5047		/*
5048		 * Treat this as a normal block read.
5049		 */
5050		zio_nowait(zio_read(zio, spa, bp, pabd, psize, NULL, NULL,
5051		    ZIO_PRIORITY_SYNC_READ,
5052		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
5053	} else {
5054		/*
5055		 * Treat this as a vdev child I/O.
5056		 */
5057		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pabd,
5058		    psize, ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
5059		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
5060		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
5061		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | ZIO_FLAG_OPTIONAL,
5062		    NULL, NULL));
5063	}
5064
5065	error = zio_wait(zio);
5066	spa_config_exit(spa, SCL_STATE, FTAG);
5067
5068	if (error) {
5069		(void) printf("Read of %s failed, error: %d\n", thing, error);
5070		goto out;
5071	}
5072
5073	if (flags & ZDB_FLAG_DECOMPRESS) {
5074		/*
5075		 * We don't know how the data was compressed, so just try
5076		 * every decompress function at every inflated blocksize.
5077		 */
5078		enum zio_compress c;
5079		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5080		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5081
5082		abd_copy_to_buf(pbuf2, pabd, psize);
5083
5084		VERIFY0(abd_iterate_func(pabd, psize, SPA_MAXBLOCKSIZE - psize,
5085		    random_get_pseudo_bytes_cb, NULL));
5086
5087		VERIFY0(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
5088		    SPA_MAXBLOCKSIZE - psize));
5089
5090		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
5091		    lsize -= SPA_MINBLOCKSIZE) {
5092			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
5093				if (zio_decompress_data(c, pabd,
5094				    lbuf, psize, lsize) == 0 &&
5095				    zio_decompress_data_buf(c, pbuf2,
5096				    lbuf2, psize, lsize) == 0 &&
5097				    bcmp(lbuf, lbuf2, lsize) == 0)
5098					break;
5099			}
5100			if (c != ZIO_COMPRESS_FUNCTIONS)
5101				break;
5102			lsize -= SPA_MINBLOCKSIZE;
5103		}
5104
5105		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
5106		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
5107
5108		if (lsize <= psize) {
5109			(void) printf("Decompress of %s failed\n", thing);
5110			goto out;
5111		}
5112		buf = lbuf;
5113		size = lsize;
5114	} else {
5115		buf = abd_to_buf(pabd);
5116		size = psize;
5117	}
5118
5119	if (flags & ZDB_FLAG_PRINT_BLKPTR)
5120		zdb_print_blkptr((blkptr_t *)(void *)
5121		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
5122	else if (flags & ZDB_FLAG_RAW)
5123		zdb_dump_block_raw(buf, size, flags);
5124	else if (flags & ZDB_FLAG_INDIRECT)
5125		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
5126		    flags);
5127	else if (flags & ZDB_FLAG_GBH)
5128		zdb_dump_gbh(buf, flags);
5129	else
5130		zdb_dump_block(thing, buf, size, flags);
5131
5132out:
5133	abd_free(pabd);
5134	umem_free(lbuf, SPA_MAXBLOCKSIZE);
5135	free(dup);
5136}
5137
5138static void
5139zdb_embedded_block(char *thing)
5140{
5141	blkptr_t bp;
5142	unsigned long long *words = (void *)&bp;
5143	char *buf;
5144	int err;
5145
5146	bzero(&bp, sizeof (bp));
5147	err = sscanf(thing, "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx:"
5148	    "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx",
5149	    words + 0, words + 1, words + 2, words + 3,
5150	    words + 4, words + 5, words + 6, words + 7,
5151	    words + 8, words + 9, words + 10, words + 11,
5152	    words + 12, words + 13, words + 14, words + 15);
5153	if (err != 16) {
5154		(void) fprintf(stderr, "invalid input format\n");
5155		exit(1);
5156	}
5157	ASSERT3U(BPE_GET_LSIZE(&bp), <=, SPA_MAXBLOCKSIZE);
5158	buf = malloc(SPA_MAXBLOCKSIZE);
5159	if (buf == NULL) {
5160		(void) fprintf(stderr, "out of memory\n");
5161		exit(1);
5162	}
5163	err = decode_embedded_bp(&bp, buf, BPE_GET_LSIZE(&bp));
5164	if (err != 0) {
5165		(void) fprintf(stderr, "decode failed: %u\n", err);
5166		exit(1);
5167	}
5168	zdb_dump_block_raw(buf, BPE_GET_LSIZE(&bp), 0);
5169	free(buf);
5170}
5171
5172static boolean_t
5173pool_match(nvlist_t *cfg, char *tgt)
5174{
5175	uint64_t v, guid = strtoull(tgt, NULL, 0);
5176	char *s;
5177
5178	if (guid != 0) {
5179		if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0)
5180			return (v == guid);
5181	} else {
5182		if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0)
5183			return (strcmp(s, tgt) == 0);
5184	}
5185	return (B_FALSE);
5186}
5187
5188static char *
5189find_zpool(char **target, nvlist_t **configp, int dirc, char **dirv)
5190{
5191	nvlist_t *pools;
5192	nvlist_t *match = NULL;
5193	char *name = NULL;
5194	char *sepp = NULL;
5195	char sep = '\0';
5196	int count = 0;
5197	importargs_t args;
5198
5199	bzero(&args, sizeof (args));
5200	args.paths = dirc;
5201	args.path = dirv;
5202	args.can_be_active = B_TRUE;
5203
5204	if ((sepp = strpbrk(*target, "/@")) != NULL) {
5205		sep = *sepp;
5206		*sepp = '\0';
5207	}
5208
5209	pools = zpool_search_import(g_zfs, &args);
5210
5211	if (pools != NULL) {
5212		nvpair_t *elem = NULL;
5213		while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) {
5214			verify(nvpair_value_nvlist(elem, configp) == 0);
5215			if (pool_match(*configp, *target)) {
5216				count++;
5217				if (match != NULL) {
5218					/* print previously found config */
5219					if (name != NULL) {
5220						(void) printf("%s\n", name);
5221						dump_nvlist(match, 8);
5222						name = NULL;
5223					}
5224					(void) printf("%s\n",
5225					    nvpair_name(elem));
5226					dump_nvlist(*configp, 8);
5227				} else {
5228					match = *configp;
5229					name = nvpair_name(elem);
5230				}
5231			}
5232		}
5233	}
5234	if (count > 1)
5235		(void) fatal("\tMatched %d pools - use pool GUID "
5236		    "instead of pool name or \n"
5237		    "\tpool name part of a dataset name to select pool", count);
5238
5239	if (sepp)
5240		*sepp = sep;
5241	/*
5242	 * If pool GUID was specified for pool id, replace it with pool name
5243	 */
5244	if (name && (strstr(*target, name) != *target)) {
5245		int sz = 1 + strlen(name) + ((sepp) ? strlen(sepp) : 0);
5246
5247		*target = umem_alloc(sz, UMEM_NOFAIL);
5248		(void) snprintf(*target, sz, "%s%s", name, sepp ? sepp : "");
5249	}
5250
5251	*configp = name ? match : NULL;
5252
5253	return (name);
5254}
5255
5256int
5257main(int argc, char **argv)
5258{
5259	int c;
5260	struct rlimit rl = { 1024, 1024 };
5261	spa_t *spa = NULL;
5262	objset_t *os = NULL;
5263	int dump_all = 1;
5264	int verbose = 0;
5265	int error = 0;
5266	char **searchdirs = NULL;
5267	int nsearch = 0;
5268	char *target;
5269	nvlist_t *policy = NULL;
5270	uint64_t max_txg = UINT64_MAX;
5271	int flags = ZFS_IMPORT_MISSING_LOG;
5272	int rewind = ZPOOL_NEVER_REWIND;
5273	char *spa_config_path_env;
5274	boolean_t target_is_spa = B_TRUE;
5275	nvlist_t *cfg = NULL;
5276
5277	(void) setrlimit(RLIMIT_NOFILE, &rl);
5278	(void) enable_extended_FILE_stdio(-1, -1);
5279
5280	dprintf_setup(&argc, argv);
5281
5282	/*
5283	 * If there is an environment variable SPA_CONFIG_PATH it overrides
5284	 * default spa_config_path setting. If -U flag is specified it will
5285	 * override this environment variable settings once again.
5286	 */
5287	spa_config_path_env = getenv("SPA_CONFIG_PATH");
5288	if (spa_config_path_env != NULL)
5289		spa_config_path = spa_config_path_env;
5290
5291	while ((c = getopt(argc, argv,
5292	    "AbcCdDeEFGhiI:klLmMo:Op:PqRsSt:uU:vVx:X")) != -1) {
5293		switch (c) {
5294		case 'b':
5295		case 'c':
5296		case 'C':
5297		case 'd':
5298		case 'D':
5299		case 'E':
5300		case 'G':
5301		case 'h':
5302		case 'i':
5303		case 'l':
5304		case 'm':
5305		case 'M':
5306		case 'O':
5307		case 'R':
5308		case 's':
5309		case 'S':
5310		case 'u':
5311			dump_opt[c]++;
5312			dump_all = 0;
5313			break;
5314		case 'A':
5315		case 'e':
5316		case 'F':
5317		case 'k':
5318		case 'L':
5319		case 'P':
5320		case 'q':
5321		case 'X':
5322			dump_opt[c]++;
5323			break;
5324		/* NB: Sort single match options below. */
5325		case 'I':
5326			max_inflight = strtoull(optarg, NULL, 0);
5327			if (max_inflight == 0) {
5328				(void) fprintf(stderr, "maximum number "
5329				    "of inflight I/Os must be greater "
5330				    "than 0\n");
5331				usage();
5332			}
5333			break;
5334		case 'o':
5335			error = set_global_var(optarg);
5336			if (error != 0)
5337				usage();
5338			break;
5339		case 'p':
5340			if (searchdirs == NULL) {
5341				searchdirs = umem_alloc(sizeof (char *),
5342				    UMEM_NOFAIL);
5343			} else {
5344				char **tmp = umem_alloc((nsearch + 1) *
5345				    sizeof (char *), UMEM_NOFAIL);
5346				bcopy(searchdirs, tmp, nsearch *
5347				    sizeof (char *));
5348				umem_free(searchdirs,
5349				    nsearch * sizeof (char *));
5350				searchdirs = tmp;
5351			}
5352			searchdirs[nsearch++] = optarg;
5353			break;
5354		case 't':
5355			max_txg = strtoull(optarg, NULL, 0);
5356			if (max_txg < TXG_INITIAL) {
5357				(void) fprintf(stderr, "incorrect txg "
5358				    "specified: %s\n", optarg);
5359				usage();
5360			}
5361			break;
5362		case 'U':
5363			spa_config_path = optarg;
5364			if (spa_config_path[0] != '/') {
5365				(void) fprintf(stderr,
5366				    "cachefile must be an absolute path "
5367				    "(i.e. start with a slash)\n");
5368				usage();
5369			}
5370			break;
5371		case 'v':
5372			verbose++;
5373			break;
5374		case 'V':
5375			flags = ZFS_IMPORT_VERBATIM;
5376			break;
5377		case 'x':
5378			vn_dumpdir = optarg;
5379			break;
5380		default:
5381			usage();
5382			break;
5383		}
5384	}
5385
5386	if (!dump_opt['e'] && searchdirs != NULL) {
5387		(void) fprintf(stderr, "-p option requires use of -e\n");
5388		usage();
5389	}
5390
5391	/*
5392	 * ZDB does not typically re-read blocks; therefore limit the ARC
5393	 * to 256 MB, which can be used entirely for metadata.
5394	 */
5395	zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
5396
5397	/*
5398	 * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
5399	 * "zdb -b" uses traversal prefetch which uses async reads.
5400	 * For good performance, let several of them be active at once.
5401	 */
5402	zfs_vdev_async_read_max_active = 10;
5403
5404	/*
5405	 * Disable reference tracking for better performance.
5406	 */
5407	reference_tracking_enable = B_FALSE;
5408
5409	/*
5410	 * Do not fail spa_load when spa_load_verify fails. This is needed
5411	 * to load non-idle pools.
5412	 */
5413	spa_load_verify_dryrun = B_TRUE;
5414
5415	kernel_init(FREAD);
5416	g_zfs = libzfs_init();
5417	ASSERT(g_zfs != NULL);
5418
5419	if (dump_all)
5420		verbose = MAX(verbose, 1);
5421
5422	for (c = 0; c < 256; c++) {
5423		if (dump_all && strchr("AeEFklLOPRSX", c) == NULL)
5424			dump_opt[c] = 1;
5425		if (dump_opt[c])
5426			dump_opt[c] += verbose;
5427	}
5428
5429	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
5430	zfs_recover = (dump_opt['A'] > 1);
5431
5432	argc -= optind;
5433	argv += optind;
5434
5435	if (argc < 2 && dump_opt['R'])
5436		usage();
5437
5438	if (dump_opt['E']) {
5439		if (argc != 1)
5440			usage();
5441		zdb_embedded_block(argv[0]);
5442		return (0);
5443	}
5444
5445	if (argc < 1) {
5446		if (!dump_opt['e'] && dump_opt['C']) {
5447			dump_cachefile(spa_config_path);
5448			return (0);
5449		}
5450		usage();
5451	}
5452
5453	if (dump_opt['l'])
5454		return (dump_label(argv[0]));
5455
5456	if (dump_opt['O']) {
5457		if (argc != 2)
5458			usage();
5459		dump_opt['v'] = verbose + 3;
5460		return (dump_path(argv[0], argv[1]));
5461	}
5462
5463	if (dump_opt['X'] || dump_opt['F'])
5464		rewind = ZPOOL_DO_REWIND |
5465		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
5466
5467	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
5468	    nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, max_txg) != 0 ||
5469	    nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY, rewind) != 0)
5470		fatal("internal error: %s", strerror(ENOMEM));
5471
5472	error = 0;
5473	target = argv[0];
5474
5475	if (dump_opt['e']) {
5476		char *name = find_zpool(&target, &cfg, nsearch, searchdirs);
5477
5478		error = ENOENT;
5479		if (name) {
5480			if (dump_opt['C'] > 1) {
5481				(void) printf("\nConfiguration for import:\n");
5482				dump_nvlist(cfg, 8);
5483			}
5484
5485			if (nvlist_add_nvlist(cfg,
5486			    ZPOOL_LOAD_POLICY, policy) != 0) {
5487				fatal("can't open '%s': %s",
5488				    target, strerror(ENOMEM));
5489			}
5490			error = spa_import(name, cfg, NULL, flags);
5491		}
5492	}
5493
5494	char *checkpoint_pool = NULL;
5495	char *checkpoint_target = NULL;
5496	if (dump_opt['k']) {
5497		checkpoint_pool = import_checkpointed_state(target, cfg,
5498		    &checkpoint_target);
5499
5500		if (checkpoint_target != NULL)
5501			target = checkpoint_target;
5502
5503	}
5504
5505	if (strpbrk(target, "/@") != NULL) {
5506		size_t targetlen;
5507
5508		target_is_spa = B_FALSE;
5509		/*
5510		 * Remove any trailing slash.  Later code would get confused
5511		 * by it, but we want to allow it so that "pool/" can
5512		 * indicate that we want to dump the topmost filesystem,
5513		 * rather than the whole pool.
5514		 */
5515		targetlen = strlen(target);
5516		if (targetlen != 0 && target[targetlen - 1] == '/')
5517			target[targetlen - 1] = '\0';
5518	}
5519
5520	if (error == 0) {
5521		if (dump_opt['k'] && (target_is_spa || dump_opt['R'])) {
5522			ASSERT(checkpoint_pool != NULL);
5523			ASSERT(checkpoint_target == NULL);
5524
5525			error = spa_open(checkpoint_pool, &spa, FTAG);
5526			if (error != 0) {
5527				fatal("Tried to open pool \"%s\" but "
5528				    "spa_open() failed with error %d\n",
5529				    checkpoint_pool, error);
5530			}
5531
5532		} else if (target_is_spa || dump_opt['R']) {
5533			error = spa_open_rewind(target, &spa, FTAG, policy,
5534			    NULL);
5535			if (error) {
5536				/*
5537				 * If we're missing the log device then
5538				 * try opening the pool after clearing the
5539				 * log state.
5540				 */
5541				mutex_enter(&spa_namespace_lock);
5542				if ((spa = spa_lookup(target)) != NULL &&
5543				    spa->spa_log_state == SPA_LOG_MISSING) {
5544					spa->spa_log_state = SPA_LOG_CLEAR;
5545					error = 0;
5546				}
5547				mutex_exit(&spa_namespace_lock);
5548
5549				if (!error) {
5550					error = spa_open_rewind(target, &spa,
5551					    FTAG, policy, NULL);
5552				}
5553			}
5554		} else {
5555			error = open_objset(target, DMU_OST_ANY, FTAG, &os);
5556		}
5557	}
5558	nvlist_free(policy);
5559
5560	if (error)
5561		fatal("can't open '%s': %s", target, strerror(error));
5562
5563	argv++;
5564	argc--;
5565	if (!dump_opt['R']) {
5566		if (argc > 0) {
5567			zopt_objects = argc;
5568			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
5569			for (unsigned i = 0; i < zopt_objects; i++) {
5570				errno = 0;
5571				zopt_object[i] = strtoull(argv[i], NULL, 0);
5572				if (zopt_object[i] == 0 && errno != 0)
5573					fatal("bad number %s: %s",
5574					    argv[i], strerror(errno));
5575			}
5576		}
5577		if (os != NULL) {
5578			dump_dir(os);
5579		} else if (zopt_objects > 0 && !dump_opt['m']) {
5580			dump_dir(spa->spa_meta_objset);
5581		} else {
5582			dump_zpool(spa);
5583		}
5584	} else {
5585		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
5586		flagbits['c'] = ZDB_FLAG_CHECKSUM;
5587		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
5588		flagbits['e'] = ZDB_FLAG_BSWAP;
5589		flagbits['g'] = ZDB_FLAG_GBH;
5590		flagbits['i'] = ZDB_FLAG_INDIRECT;
5591		flagbits['p'] = ZDB_FLAG_PHYS;
5592		flagbits['r'] = ZDB_FLAG_RAW;
5593
5594		for (int i = 0; i < argc; i++)
5595			zdb_read_block(argv[i], spa);
5596	}
5597
5598	if (dump_opt['k']) {
5599		free(checkpoint_pool);
5600		if (!target_is_spa)
5601			free(checkpoint_target);
5602	}
5603
5604	if (os != NULL)
5605		close_objset(os, FTAG);
5606	else
5607		spa_close(spa, FTAG);
5608
5609	fuid_table_destroy();
5610
5611	dump_debug_buffer();
5612
5613	libzfs_fini(g_zfs);
5614	kernel_fini();
5615
5616	return (error);
5617}
5618