zdb.c revision 20b5dafb425396adaebd0267d29e1026fc4dc413
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 <zfs_comutil.h>
67#include <libcmdutils.h>
68#undef verify
69#include <libzfs.h>
70
71#include "zdb.h"
72
73#define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
74	zio_compress_table[(idx)].ci_name : "UNKNOWN")
75#define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
76	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
77#define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
78	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
79	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
80#define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
81	(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ?	\
82	DMU_OT_ZAP_OTHER : \
83	(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
84	DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
85
86#ifndef lint
87extern int reference_tracking_enable;
88extern boolean_t zfs_recover;
89extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
90extern int zfs_vdev_async_read_max_active;
91extern int aok;
92extern boolean_t spa_load_verify_dryrun;
93#else
94int reference_tracking_enable;
95boolean_t zfs_recover;
96uint64_t zfs_arc_max, zfs_arc_meta_limit;
97int zfs_vdev_async_read_max_active;
98int aok;
99boolean_t spa_load_verify_dryrun;
100#endif
101
102static const char cmdname[] = "zdb";
103uint8_t dump_opt[256];
104
105typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
106
107uint64_t *zopt_object = NULL;
108static unsigned zopt_objects = 0;
109libzfs_handle_t *g_zfs;
110uint64_t max_inflight = 1000;
111static int leaked_objects = 0;
112
113static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
114
115/*
116 * These libumem hooks provide a reasonable set of defaults for the allocator's
117 * debugging facilities.
118 */
119const char *
120_umem_debug_init()
121{
122	return ("default,verbose"); /* $UMEM_DEBUG setting */
123}
124
125const char *
126_umem_logging_init(void)
127{
128	return ("fail,contents"); /* $UMEM_LOGGING setting */
129}
130
131static void
132usage(void)
133{
134	(void) fprintf(stderr,
135	    "Usage:\t%s [-AbcdDFGhikLMPsvX] [-e [-V] [-p <path> ...]] "
136	    "[-I <inflight I/Os>]\n"
137	    "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
138	    "\t\t[<poolname> [<object> ...]]\n"
139	    "\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset> "
140	    "[<object> ...]\n"
141	    "\t%s -C [-A] [-U <cache>]\n"
142	    "\t%s -l [-Aqu] <device>\n"
143	    "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
144	    "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
145	    "\t%s -O <dataset> <path>\n"
146	    "\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
147	    "\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
148	    "\t%s -E [-A] word0:word1:...:word15\n"
149	    "\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
150	    "<poolname>\n\n",
151	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
152	    cmdname, cmdname);
153
154	(void) fprintf(stderr, "    Dataset name must include at least one "
155	    "separator character '/' or '@'\n");
156	(void) fprintf(stderr, "    If dataset name is specified, only that "
157	    "dataset is dumped\n");
158	(void) fprintf(stderr, "    If object numbers are specified, only "
159	    "those objects are dumped\n\n");
160	(void) fprintf(stderr, "    Options to control amount of output:\n");
161	(void) fprintf(stderr, "        -b block statistics\n");
162	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
163	    "all data) blocks\n");
164	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
165	(void) fprintf(stderr, "        -d dataset(s)\n");
166	(void) fprintf(stderr, "        -D dedup statistics\n");
167	(void) fprintf(stderr, "        -E decode and display block from an "
168	    "embedded block pointer\n");
169	(void) fprintf(stderr, "        -h pool history\n");
170	(void) fprintf(stderr, "        -i intent logs\n");
171	(void) fprintf(stderr, "        -l read label contents\n");
172	(void) fprintf(stderr, "        -k examine the checkpointed state "
173	    "of the pool\n");
174	(void) fprintf(stderr, "        -L disable leak tracking (do not "
175	    "load spacemaps)\n");
176	(void) fprintf(stderr, "        -m metaslabs\n");
177	(void) fprintf(stderr, "        -M metaslab groups\n");
178	(void) fprintf(stderr, "        -O perform object lookups by path\n");
179	(void) fprintf(stderr, "        -R read and display block from a "
180	    "device\n");
181	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
182	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
183	(void) fprintf(stderr, "        -v verbose (applies to all "
184	    "others)\n\n");
185	(void) fprintf(stderr, "    Below options are intended for use "
186	    "with other options:\n");
187	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
188	    "panic recovery (-AA) or both (-AAA)\n");
189	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
190	    "has altroot/not in a cachefile\n");
191	(void) fprintf(stderr, "        -F attempt automatic rewind within "
192	    "safe range of transaction groups\n");
193	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
194	    "exiting\n");
195	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
196	    "specify the maximum number of "
197	    "checksumming I/Os [default is 200]\n");
198	(void) fprintf(stderr, "        -o <variable>=<value> set global "
199	    "variable to an unsigned 32-bit integer value\n");
200	(void) fprintf(stderr, "        -p <path> -- use one or more with "
201	    "-e to specify path to vdev dir\n");
202	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
203	(void) fprintf(stderr, "        -q don't print label contents\n");
204	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
205	    "searching for uberblocks\n");
206	(void) fprintf(stderr, "        -u uberblock\n");
207	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
208	    "cachefile\n");
209	(void) fprintf(stderr, "        -V do verbatim import\n");
210	(void) fprintf(stderr, "        -x <dumpdir> -- "
211	    "dump all read blocks into specified directory\n");
212	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
213	    "work with dataset)\n\n");
214	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
215	    "to make only that option verbose\n");
216	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
217	exit(1);
218}
219
220static void
221dump_debug_buffer()
222{
223	if (dump_opt['G']) {
224		(void) printf("\n");
225		zfs_dbgmsg_print("zdb");
226	}
227}
228
229/*
230 * Called for usage errors that are discovered after a call to spa_open(),
231 * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
232 */
233
234static void
235fatal(const char *fmt, ...)
236{
237	va_list ap;
238
239	va_start(ap, fmt);
240	(void) fprintf(stderr, "%s: ", cmdname);
241	(void) vfprintf(stderr, fmt, ap);
242	va_end(ap);
243	(void) fprintf(stderr, "\n");
244
245	dump_debug_buffer();
246
247	exit(1);
248}
249
250/* ARGSUSED */
251static void
252dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
253{
254	nvlist_t *nv;
255	size_t nvsize = *(uint64_t *)data;
256	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
257
258	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
259
260	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
261
262	umem_free(packed, nvsize);
263
264	dump_nvlist(nv, 8);
265
266	nvlist_free(nv);
267}
268
269/* ARGSUSED */
270static void
271dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
272{
273	spa_history_phys_t *shp = data;
274
275	if (shp == NULL)
276		return;
277
278	(void) printf("\t\tpool_create_len = %llu\n",
279	    (u_longlong_t)shp->sh_pool_create_len);
280	(void) printf("\t\tphys_max_off = %llu\n",
281	    (u_longlong_t)shp->sh_phys_max_off);
282	(void) printf("\t\tbof = %llu\n",
283	    (u_longlong_t)shp->sh_bof);
284	(void) printf("\t\teof = %llu\n",
285	    (u_longlong_t)shp->sh_eof);
286	(void) printf("\t\trecords_lost = %llu\n",
287	    (u_longlong_t)shp->sh_records_lost);
288}
289
290static void
291zdb_nicenum(uint64_t num, char *buf, size_t buflen)
292{
293	if (dump_opt['P'])
294		(void) snprintf(buf, buflen, "%llu", (longlong_t)num);
295	else
296		nicenum(num, buf, sizeof (buf));
297}
298
299static const char histo_stars[] = "****************************************";
300static const uint64_t histo_width = sizeof (histo_stars) - 1;
301
302static void
303dump_histogram(const uint64_t *histo, int size, int offset)
304{
305	int i;
306	int minidx = size - 1;
307	int maxidx = 0;
308	uint64_t max = 0;
309
310	for (i = 0; i < size; i++) {
311		if (histo[i] > max)
312			max = histo[i];
313		if (histo[i] > 0 && i > maxidx)
314			maxidx = i;
315		if (histo[i] > 0 && i < minidx)
316			minidx = i;
317	}
318
319	if (max < histo_width)
320		max = histo_width;
321
322	for (i = minidx; i <= maxidx; i++) {
323		(void) printf("\t\t\t%3u: %6llu %s\n",
324		    i + offset, (u_longlong_t)histo[i],
325		    &histo_stars[(max - histo[i]) * histo_width / max]);
326	}
327}
328
329static void
330dump_zap_stats(objset_t *os, uint64_t object)
331{
332	int error;
333	zap_stats_t zs;
334
335	error = zap_get_stats(os, object, &zs);
336	if (error)
337		return;
338
339	if (zs.zs_ptrtbl_len == 0) {
340		ASSERT(zs.zs_num_blocks == 1);
341		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
342		    (u_longlong_t)zs.zs_blocksize,
343		    (u_longlong_t)zs.zs_num_entries);
344		return;
345	}
346
347	(void) printf("\tFat ZAP stats:\n");
348
349	(void) printf("\t\tPointer table:\n");
350	(void) printf("\t\t\t%llu elements\n",
351	    (u_longlong_t)zs.zs_ptrtbl_len);
352	(void) printf("\t\t\tzt_blk: %llu\n",
353	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
354	(void) printf("\t\t\tzt_numblks: %llu\n",
355	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
356	(void) printf("\t\t\tzt_shift: %llu\n",
357	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
358	(void) printf("\t\t\tzt_blks_copied: %llu\n",
359	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
360	(void) printf("\t\t\tzt_nextblk: %llu\n",
361	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
362
363	(void) printf("\t\tZAP entries: %llu\n",
364	    (u_longlong_t)zs.zs_num_entries);
365	(void) printf("\t\tLeaf blocks: %llu\n",
366	    (u_longlong_t)zs.zs_num_leafs);
367	(void) printf("\t\tTotal blocks: %llu\n",
368	    (u_longlong_t)zs.zs_num_blocks);
369	(void) printf("\t\tzap_block_type: 0x%llx\n",
370	    (u_longlong_t)zs.zs_block_type);
371	(void) printf("\t\tzap_magic: 0x%llx\n",
372	    (u_longlong_t)zs.zs_magic);
373	(void) printf("\t\tzap_salt: 0x%llx\n",
374	    (u_longlong_t)zs.zs_salt);
375
376	(void) printf("\t\tLeafs with 2^n pointers:\n");
377	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
378
379	(void) printf("\t\tBlocks with n*5 entries:\n");
380	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
381
382	(void) printf("\t\tBlocks n/10 full:\n");
383	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
384
385	(void) printf("\t\tEntries with n chunks:\n");
386	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
387
388	(void) printf("\t\tBuckets with n entries:\n");
389	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
390}
391
392/*ARGSUSED*/
393static void
394dump_none(objset_t *os, uint64_t object, void *data, size_t size)
395{
396}
397
398/*ARGSUSED*/
399static void
400dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
401{
402	(void) printf("\tUNKNOWN OBJECT TYPE\n");
403}
404
405/*ARGSUSED*/
406static void
407dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
408{
409}
410
411/*ARGSUSED*/
412static void
413dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
414{
415}
416
417/*ARGSUSED*/
418static void
419dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
420{
421	zap_cursor_t zc;
422	zap_attribute_t attr;
423	void *prop;
424	unsigned i;
425
426	dump_zap_stats(os, object);
427	(void) printf("\n");
428
429	for (zap_cursor_init(&zc, os, object);
430	    zap_cursor_retrieve(&zc, &attr) == 0;
431	    zap_cursor_advance(&zc)) {
432		(void) printf("\t\t%s = ", attr.za_name);
433		if (attr.za_num_integers == 0) {
434			(void) printf("\n");
435			continue;
436		}
437		prop = umem_zalloc(attr.za_num_integers *
438		    attr.za_integer_length, UMEM_NOFAIL);
439		(void) zap_lookup(os, object, attr.za_name,
440		    attr.za_integer_length, attr.za_num_integers, prop);
441		if (attr.za_integer_length == 1) {
442			(void) printf("%s", (char *)prop);
443		} else {
444			for (i = 0; i < attr.za_num_integers; i++) {
445				switch (attr.za_integer_length) {
446				case 2:
447					(void) printf("%u ",
448					    ((uint16_t *)prop)[i]);
449					break;
450				case 4:
451					(void) printf("%u ",
452					    ((uint32_t *)prop)[i]);
453					break;
454				case 8:
455					(void) printf("%lld ",
456					    (u_longlong_t)((int64_t *)prop)[i]);
457					break;
458				}
459			}
460		}
461		(void) printf("\n");
462		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
463	}
464	zap_cursor_fini(&zc);
465}
466
467static void
468dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
469{
470	bpobj_phys_t *bpop = data;
471	char bytes[32], comp[32], uncomp[32];
472
473	/* make sure the output won't get truncated */
474	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
475	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
476	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
477
478	if (bpop == NULL)
479		return;
480
481	zdb_nicenum(bpop->bpo_bytes, bytes, sizeof (bytes));
482	zdb_nicenum(bpop->bpo_comp, comp, sizeof (comp));
483	zdb_nicenum(bpop->bpo_uncomp, uncomp, sizeof (uncomp));
484
485	(void) printf("\t\tnum_blkptrs = %llu\n",
486	    (u_longlong_t)bpop->bpo_num_blkptrs);
487	(void) printf("\t\tbytes = %s\n", bytes);
488	if (size >= BPOBJ_SIZE_V1) {
489		(void) printf("\t\tcomp = %s\n", comp);
490		(void) printf("\t\tuncomp = %s\n", uncomp);
491	}
492	if (size >= sizeof (*bpop)) {
493		(void) printf("\t\tsubobjs = %llu\n",
494		    (u_longlong_t)bpop->bpo_subobjs);
495		(void) printf("\t\tnum_subobjs = %llu\n",
496		    (u_longlong_t)bpop->bpo_num_subobjs);
497	}
498
499	if (dump_opt['d'] < 5)
500		return;
501
502	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
503		char blkbuf[BP_SPRINTF_LEN];
504		blkptr_t bp;
505
506		int err = dmu_read(os, object,
507		    i * sizeof (bp), sizeof (bp), &bp, 0);
508		if (err != 0) {
509			(void) printf("got error %u from dmu_read\n", err);
510			break;
511		}
512		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
513		(void) printf("\t%s\n", blkbuf);
514	}
515}
516
517/* ARGSUSED */
518static void
519dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
520{
521	dmu_object_info_t doi;
522
523	VERIFY0(dmu_object_info(os, object, &doi));
524	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
525
526	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
527	if (err != 0) {
528		(void) printf("got error %u from dmu_read\n", err);
529		kmem_free(subobjs, doi.doi_max_offset);
530		return;
531	}
532
533	int64_t last_nonzero = -1;
534	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
535		if (subobjs[i] != 0)
536			last_nonzero = i;
537	}
538
539	for (int64_t i = 0; i <= last_nonzero; i++) {
540		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
541	}
542	kmem_free(subobjs, doi.doi_max_offset);
543}
544
545/*ARGSUSED*/
546static void
547dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
548{
549	dump_zap_stats(os, object);
550	/* contents are printed elsewhere, properly decoded */
551}
552
553/*ARGSUSED*/
554static void
555dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
556{
557	zap_cursor_t zc;
558	zap_attribute_t attr;
559
560	dump_zap_stats(os, object);
561	(void) printf("\n");
562
563	for (zap_cursor_init(&zc, os, object);
564	    zap_cursor_retrieve(&zc, &attr) == 0;
565	    zap_cursor_advance(&zc)) {
566		(void) printf("\t\t%s = ", attr.za_name);
567		if (attr.za_num_integers == 0) {
568			(void) printf("\n");
569			continue;
570		}
571		(void) printf(" %llx : [%d:%d:%d]\n",
572		    (u_longlong_t)attr.za_first_integer,
573		    (int)ATTR_LENGTH(attr.za_first_integer),
574		    (int)ATTR_BSWAP(attr.za_first_integer),
575		    (int)ATTR_NUM(attr.za_first_integer));
576	}
577	zap_cursor_fini(&zc);
578}
579
580/*ARGSUSED*/
581static void
582dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
583{
584	zap_cursor_t zc;
585	zap_attribute_t attr;
586	uint16_t *layout_attrs;
587	unsigned i;
588
589	dump_zap_stats(os, object);
590	(void) printf("\n");
591
592	for (zap_cursor_init(&zc, os, object);
593	    zap_cursor_retrieve(&zc, &attr) == 0;
594	    zap_cursor_advance(&zc)) {
595		(void) printf("\t\t%s = [", attr.za_name);
596		if (attr.za_num_integers == 0) {
597			(void) printf("\n");
598			continue;
599		}
600
601		VERIFY(attr.za_integer_length == 2);
602		layout_attrs = umem_zalloc(attr.za_num_integers *
603		    attr.za_integer_length, UMEM_NOFAIL);
604
605		VERIFY(zap_lookup(os, object, attr.za_name,
606		    attr.za_integer_length,
607		    attr.za_num_integers, layout_attrs) == 0);
608
609		for (i = 0; i != attr.za_num_integers; i++)
610			(void) printf(" %d ", (int)layout_attrs[i]);
611		(void) printf("]\n");
612		umem_free(layout_attrs,
613		    attr.za_num_integers * attr.za_integer_length);
614	}
615	zap_cursor_fini(&zc);
616}
617
618/*ARGSUSED*/
619static void
620dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
621{
622	zap_cursor_t zc;
623	zap_attribute_t attr;
624	const char *typenames[] = {
625		/* 0 */ "not specified",
626		/* 1 */ "FIFO",
627		/* 2 */ "Character Device",
628		/* 3 */ "3 (invalid)",
629		/* 4 */ "Directory",
630		/* 5 */ "5 (invalid)",
631		/* 6 */ "Block Device",
632		/* 7 */ "7 (invalid)",
633		/* 8 */ "Regular File",
634		/* 9 */ "9 (invalid)",
635		/* 10 */ "Symbolic Link",
636		/* 11 */ "11 (invalid)",
637		/* 12 */ "Socket",
638		/* 13 */ "Door",
639		/* 14 */ "Event Port",
640		/* 15 */ "15 (invalid)",
641	};
642
643	dump_zap_stats(os, object);
644	(void) printf("\n");
645
646	for (zap_cursor_init(&zc, os, object);
647	    zap_cursor_retrieve(&zc, &attr) == 0;
648	    zap_cursor_advance(&zc)) {
649		(void) printf("\t\t%s = %lld (type: %s)\n",
650		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
651		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
652	}
653	zap_cursor_fini(&zc);
654}
655
656static int
657get_dtl_refcount(vdev_t *vd)
658{
659	int refcount = 0;
660
661	if (vd->vdev_ops->vdev_op_leaf) {
662		space_map_t *sm = vd->vdev_dtl_sm;
663
664		if (sm != NULL &&
665		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
666			return (1);
667		return (0);
668	}
669
670	for (unsigned c = 0; c < vd->vdev_children; c++)
671		refcount += get_dtl_refcount(vd->vdev_child[c]);
672	return (refcount);
673}
674
675static int
676get_metaslab_refcount(vdev_t *vd)
677{
678	int refcount = 0;
679
680	if (vd->vdev_top == vd) {
681		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
682			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
683
684			if (sm != NULL &&
685			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
686				refcount++;
687		}
688	}
689	for (unsigned c = 0; c < vd->vdev_children; c++)
690		refcount += get_metaslab_refcount(vd->vdev_child[c]);
691
692	return (refcount);
693}
694
695static int
696get_obsolete_refcount(vdev_t *vd)
697{
698	int refcount = 0;
699
700	uint64_t obsolete_sm_obj = vdev_obsolete_sm_object(vd);
701	if (vd->vdev_top == vd && obsolete_sm_obj != 0) {
702		dmu_object_info_t doi;
703		VERIFY0(dmu_object_info(vd->vdev_spa->spa_meta_objset,
704		    obsolete_sm_obj, &doi));
705		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
706			refcount++;
707		}
708	} else {
709		ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
710		ASSERT3U(obsolete_sm_obj, ==, 0);
711	}
712	for (unsigned c = 0; c < vd->vdev_children; c++) {
713		refcount += get_obsolete_refcount(vd->vdev_child[c]);
714	}
715
716	return (refcount);
717}
718
719static int
720get_prev_obsolete_spacemap_refcount(spa_t *spa)
721{
722	uint64_t prev_obj =
723	    spa->spa_condensing_indirect_phys.scip_prev_obsolete_sm_object;
724	if (prev_obj != 0) {
725		dmu_object_info_t doi;
726		VERIFY0(dmu_object_info(spa->spa_meta_objset, prev_obj, &doi));
727		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
728			return (1);
729		}
730	}
731	return (0);
732}
733
734static int
735get_checkpoint_refcount(vdev_t *vd)
736{
737	int refcount = 0;
738
739	if (vd->vdev_top == vd && vd->vdev_top_zap != 0 &&
740	    zap_contains(spa_meta_objset(vd->vdev_spa),
741	    vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) == 0)
742		refcount++;
743
744	for (uint64_t c = 0; c < vd->vdev_children; c++)
745		refcount += get_checkpoint_refcount(vd->vdev_child[c]);
746
747	return (refcount);
748}
749
750static int
751verify_spacemap_refcounts(spa_t *spa)
752{
753	uint64_t expected_refcount = 0;
754	uint64_t actual_refcount;
755
756	(void) feature_get_refcount(spa,
757	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
758	    &expected_refcount);
759	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
760	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
761	actual_refcount += get_obsolete_refcount(spa->spa_root_vdev);
762	actual_refcount += get_prev_obsolete_spacemap_refcount(spa);
763	actual_refcount += get_checkpoint_refcount(spa->spa_root_vdev);
764
765	if (expected_refcount != actual_refcount) {
766		(void) printf("space map refcount mismatch: expected %lld != "
767		    "actual %lld\n",
768		    (longlong_t)expected_refcount,
769		    (longlong_t)actual_refcount);
770		return (2);
771	}
772	return (0);
773}
774
775static void
776dump_spacemap(objset_t *os, space_map_t *sm)
777{
778	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
779	    "INVALID", "INVALID", "INVALID", "INVALID" };
780
781	if (sm == NULL)
782		return;
783
784	(void) printf("space map object %llu:\n",
785	    (longlong_t)sm->sm_phys->smp_object);
786	(void) printf("  smp_objsize = 0x%llx\n",
787	    (longlong_t)sm->sm_phys->smp_objsize);
788	(void) printf("  smp_alloc = 0x%llx\n",
789	    (longlong_t)sm->sm_phys->smp_alloc);
790
791	/*
792	 * Print out the freelist entries in both encoded and decoded form.
793	 */
794	uint8_t mapshift = sm->sm_shift;
795	int64_t alloc = 0;
796	uint64_t word;
797	for (uint64_t offset = 0; offset < space_map_length(sm);
798	    offset += sizeof (word)) {
799
800		VERIFY0(dmu_read(os, space_map_object(sm), offset,
801		    sizeof (word), &word, DMU_READ_PREFETCH));
802
803		if (sm_entry_is_debug(word)) {
804			(void) printf("\t    [%6llu] %s: txg %llu, pass %llu\n",
805			    (u_longlong_t)(offset / sizeof (word)),
806			    ddata[SM_DEBUG_ACTION_DECODE(word)],
807			    (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
808			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
809			continue;
810		}
811
812		uint8_t words;
813		char entry_type;
814		uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;
815
816		if (sm_entry_is_single_word(word)) {
817			entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
818			    'A' : 'F';
819			entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
820			    sm->sm_start;
821			entry_run = SM_RUN_DECODE(word) << mapshift;
822			words = 1;
823		} else {
824			/* it is a two-word entry so we read another word */
825			ASSERT(sm_entry_is_double_word(word));
826
827			uint64_t extra_word;
828			offset += sizeof (extra_word);
829			VERIFY0(dmu_read(os, space_map_object(sm), offset,
830			    sizeof (extra_word), &extra_word,
831			    DMU_READ_PREFETCH));
832
833			ASSERT3U(offset, <=, space_map_length(sm));
834
835			entry_run = SM2_RUN_DECODE(word) << mapshift;
836			entry_vdev = SM2_VDEV_DECODE(word);
837			entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
838			    'A' : 'F';
839			entry_off = (SM2_OFFSET_DECODE(extra_word) <<
840			    mapshift) + sm->sm_start;
841			words = 2;
842		}
843
844		(void) printf("\t    [%6llu]    %c  range:"
845		    " %010llx-%010llx  size: %06llx vdev: %06llu words: %u\n",
846		    (u_longlong_t)(offset / sizeof (word)),
847		    entry_type, (u_longlong_t)entry_off,
848		    (u_longlong_t)(entry_off + entry_run),
849		    (u_longlong_t)entry_run,
850		    (u_longlong_t)entry_vdev, words);
851
852		if (entry_type == 'A')
853			alloc += entry_run;
854		else
855			alloc -= entry_run;
856	}
857	if ((uint64_t)alloc != space_map_allocated(sm)) {
858		(void) printf("space_map_object alloc (%lld) INCONSISTENT "
859		    "with space map summary (%lld)\n",
860		    (longlong_t)space_map_allocated(sm), (longlong_t)alloc);
861	}
862}
863
864static void
865dump_metaslab_stats(metaslab_t *msp)
866{
867	char maxbuf[32];
868	range_tree_t *rt = msp->ms_allocatable;
869	avl_tree_t *t = &msp->ms_allocatable_by_size;
870	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
871
872	/* max sure nicenum has enough space */
873	CTASSERT(sizeof (maxbuf) >= NN_NUMBUF_SZ);
874
875	zdb_nicenum(metaslab_block_maxsize(msp), maxbuf, sizeof (maxbuf));
876
877	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
878	    "segments", avl_numnodes(t), "maxsize", maxbuf,
879	    "freepct", free_pct);
880	(void) printf("\tIn-memory histogram:\n");
881	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
882}
883
884static void
885dump_metaslab(metaslab_t *msp)
886{
887	vdev_t *vd = msp->ms_group->mg_vd;
888	spa_t *spa = vd->vdev_spa;
889	space_map_t *sm = msp->ms_sm;
890	char freebuf[32];
891
892	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf,
893	    sizeof (freebuf));
894
895	(void) printf(
896	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
897	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
898	    (u_longlong_t)space_map_object(sm), freebuf);
899
900	if (dump_opt['m'] > 2 && !dump_opt['L']) {
901		mutex_enter(&msp->ms_lock);
902		metaslab_load_wait(msp);
903		if (!msp->ms_loaded) {
904			VERIFY0(metaslab_load(msp));
905			range_tree_stat_verify(msp->ms_allocatable);
906		}
907		dump_metaslab_stats(msp);
908		metaslab_unload(msp);
909		mutex_exit(&msp->ms_lock);
910	}
911
912	if (dump_opt['m'] > 1 && sm != NULL &&
913	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
914		/*
915		 * The space map histogram represents free space in chunks
916		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
917		 */
918		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
919		    (u_longlong_t)msp->ms_fragmentation);
920		dump_histogram(sm->sm_phys->smp_histogram,
921		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
922	}
923
924	if (dump_opt['d'] > 5 || dump_opt['m'] > 3) {
925		ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
926
927		dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
928	}
929}
930
931static void
932print_vdev_metaslab_header(vdev_t *vd)
933{
934	(void) printf("\tvdev %10llu\n\t%-10s%5llu   %-19s   %-15s   %-10s\n",
935	    (u_longlong_t)vd->vdev_id,
936	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
937	    "offset", "spacemap", "free");
938	(void) printf("\t%15s   %19s   %15s   %10s\n",
939	    "---------------", "-------------------",
940	    "---------------", "-------------");
941}
942
943static void
944dump_metaslab_groups(spa_t *spa)
945{
946	vdev_t *rvd = spa->spa_root_vdev;
947	metaslab_class_t *mc = spa_normal_class(spa);
948	uint64_t fragmentation;
949
950	metaslab_class_histogram_verify(mc);
951
952	for (unsigned c = 0; c < rvd->vdev_children; c++) {
953		vdev_t *tvd = rvd->vdev_child[c];
954		metaslab_group_t *mg = tvd->vdev_mg;
955
956		if (mg->mg_class != mc)
957			continue;
958
959		metaslab_group_histogram_verify(mg);
960		mg->mg_fragmentation = metaslab_group_fragmentation(mg);
961
962		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
963		    "fragmentation",
964		    (u_longlong_t)tvd->vdev_id,
965		    (u_longlong_t)tvd->vdev_ms_count);
966		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
967			(void) printf("%3s\n", "-");
968		} else {
969			(void) printf("%3llu%%\n",
970			    (u_longlong_t)mg->mg_fragmentation);
971		}
972		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
973	}
974
975	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
976	fragmentation = metaslab_class_fragmentation(mc);
977	if (fragmentation == ZFS_FRAG_INVALID)
978		(void) printf("\t%3s\n", "-");
979	else
980		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
981	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
982}
983
984static void
985print_vdev_indirect(vdev_t *vd)
986{
987	vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
988	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
989	vdev_indirect_births_t *vib = vd->vdev_indirect_births;
990
991	if (vim == NULL) {
992		ASSERT3P(vib, ==, NULL);
993		return;
994	}
995
996	ASSERT3U(vdev_indirect_mapping_object(vim), ==,
997	    vic->vic_mapping_object);
998	ASSERT3U(vdev_indirect_births_object(vib), ==,
999	    vic->vic_births_object);
1000
1001	(void) printf("indirect births obj %llu:\n",
1002	    (longlong_t)vic->vic_births_object);
1003	(void) printf("    vib_count = %llu\n",
1004	    (longlong_t)vdev_indirect_births_count(vib));
1005	for (uint64_t i = 0; i < vdev_indirect_births_count(vib); i++) {
1006		vdev_indirect_birth_entry_phys_t *cur_vibe =
1007		    &vib->vib_entries[i];
1008		(void) printf("\toffset %llx -> txg %llu\n",
1009		    (longlong_t)cur_vibe->vibe_offset,
1010		    (longlong_t)cur_vibe->vibe_phys_birth_txg);
1011	}
1012	(void) printf("\n");
1013
1014	(void) printf("indirect mapping obj %llu:\n",
1015	    (longlong_t)vic->vic_mapping_object);
1016	(void) printf("    vim_max_offset = 0x%llx\n",
1017	    (longlong_t)vdev_indirect_mapping_max_offset(vim));
1018	(void) printf("    vim_bytes_mapped = 0x%llx\n",
1019	    (longlong_t)vdev_indirect_mapping_bytes_mapped(vim));
1020	(void) printf("    vim_count = %llu\n",
1021	    (longlong_t)vdev_indirect_mapping_num_entries(vim));
1022
1023	if (dump_opt['d'] <= 5 && dump_opt['m'] <= 3)
1024		return;
1025
1026	uint32_t *counts = vdev_indirect_mapping_load_obsolete_counts(vim);
1027
1028	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
1029		vdev_indirect_mapping_entry_phys_t *vimep =
1030		    &vim->vim_entries[i];
1031		(void) printf("\t<%llx:%llx:%llx> -> "
1032		    "<%llx:%llx:%llx> (%x obsolete)\n",
1033		    (longlong_t)vd->vdev_id,
1034		    (longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
1035		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1036		    (longlong_t)DVA_GET_VDEV(&vimep->vimep_dst),
1037		    (longlong_t)DVA_GET_OFFSET(&vimep->vimep_dst),
1038		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1039		    counts[i]);
1040	}
1041	(void) printf("\n");
1042
1043	uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd);
1044	if (obsolete_sm_object != 0) {
1045		objset_t *mos = vd->vdev_spa->spa_meta_objset;
1046		(void) printf("obsolete space map object %llu:\n",
1047		    (u_longlong_t)obsolete_sm_object);
1048		ASSERT(vd->vdev_obsolete_sm != NULL);
1049		ASSERT3U(space_map_object(vd->vdev_obsolete_sm), ==,
1050		    obsolete_sm_object);
1051		dump_spacemap(mos, vd->vdev_obsolete_sm);
1052		(void) printf("\n");
1053	}
1054}
1055
1056static void
1057dump_metaslabs(spa_t *spa)
1058{
1059	vdev_t *vd, *rvd = spa->spa_root_vdev;
1060	uint64_t m, c = 0, children = rvd->vdev_children;
1061
1062	(void) printf("\nMetaslabs:\n");
1063
1064	if (!dump_opt['d'] && zopt_objects > 0) {
1065		c = zopt_object[0];
1066
1067		if (c >= children)
1068			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
1069
1070		if (zopt_objects > 1) {
1071			vd = rvd->vdev_child[c];
1072			print_vdev_metaslab_header(vd);
1073
1074			for (m = 1; m < zopt_objects; m++) {
1075				if (zopt_object[m] < vd->vdev_ms_count)
1076					dump_metaslab(
1077					    vd->vdev_ms[zopt_object[m]]);
1078				else
1079					(void) fprintf(stderr, "bad metaslab "
1080					    "number %llu\n",
1081					    (u_longlong_t)zopt_object[m]);
1082			}
1083			(void) printf("\n");
1084			return;
1085		}
1086		children = c + 1;
1087	}
1088	for (; c < children; c++) {
1089		vd = rvd->vdev_child[c];
1090		print_vdev_metaslab_header(vd);
1091
1092		print_vdev_indirect(vd);
1093
1094		for (m = 0; m < vd->vdev_ms_count; m++)
1095			dump_metaslab(vd->vdev_ms[m]);
1096		(void) printf("\n");
1097	}
1098}
1099
1100static void
1101dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
1102{
1103	const ddt_phys_t *ddp = dde->dde_phys;
1104	const ddt_key_t *ddk = &dde->dde_key;
1105	const char *types[4] = { "ditto", "single", "double", "triple" };
1106	char blkbuf[BP_SPRINTF_LEN];
1107	blkptr_t blk;
1108
1109	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
1110		if (ddp->ddp_phys_birth == 0)
1111			continue;
1112		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
1113		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
1114		(void) printf("index %llx refcnt %llu %s %s\n",
1115		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
1116		    types[p], blkbuf);
1117	}
1118}
1119
1120static void
1121dump_dedup_ratio(const ddt_stat_t *dds)
1122{
1123	double rL, rP, rD, D, dedup, compress, copies;
1124
1125	if (dds->dds_blocks == 0)
1126		return;
1127
1128	rL = (double)dds->dds_ref_lsize;
1129	rP = (double)dds->dds_ref_psize;
1130	rD = (double)dds->dds_ref_dsize;
1131	D = (double)dds->dds_dsize;
1132
1133	dedup = rD / D;
1134	compress = rL / rP;
1135	copies = rD / rP;
1136
1137	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
1138	    "dedup * compress / copies = %.2f\n\n",
1139	    dedup, compress, copies, dedup * compress / copies);
1140}
1141
1142static void
1143dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
1144{
1145	char name[DDT_NAMELEN];
1146	ddt_entry_t dde;
1147	uint64_t walk = 0;
1148	dmu_object_info_t doi;
1149	uint64_t count, dspace, mspace;
1150	int error;
1151
1152	error = ddt_object_info(ddt, type, class, &doi);
1153
1154	if (error == ENOENT)
1155		return;
1156	ASSERT(error == 0);
1157
1158	if ((count = ddt_object_count(ddt, type, class)) == 0)
1159		return;
1160
1161	dspace = doi.doi_physical_blocks_512 << 9;
1162	mspace = doi.doi_fill_count * doi.doi_data_block_size;
1163
1164	ddt_object_name(ddt, type, class, name);
1165
1166	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
1167	    name,
1168	    (u_longlong_t)count,
1169	    (u_longlong_t)(dspace / count),
1170	    (u_longlong_t)(mspace / count));
1171
1172	if (dump_opt['D'] < 3)
1173		return;
1174
1175	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
1176
1177	if (dump_opt['D'] < 4)
1178		return;
1179
1180	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
1181		return;
1182
1183	(void) printf("%s contents:\n\n", name);
1184
1185	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
1186		dump_dde(ddt, &dde, walk);
1187
1188	ASSERT3U(error, ==, ENOENT);
1189
1190	(void) printf("\n");
1191}
1192
1193static void
1194dump_all_ddts(spa_t *spa)
1195{
1196	ddt_histogram_t ddh_total;
1197	ddt_stat_t dds_total;
1198
1199	bzero(&ddh_total, sizeof (ddh_total));
1200	bzero(&dds_total, sizeof (dds_total));
1201
1202	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
1203		ddt_t *ddt = spa->spa_ddt[c];
1204		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
1205			for (enum ddt_class class = 0; class < DDT_CLASSES;
1206			    class++) {
1207				dump_ddt(ddt, type, class);
1208			}
1209		}
1210	}
1211
1212	ddt_get_dedup_stats(spa, &dds_total);
1213
1214	if (dds_total.dds_blocks == 0) {
1215		(void) printf("All DDTs are empty\n");
1216		return;
1217	}
1218
1219	(void) printf("\n");
1220
1221	if (dump_opt['D'] > 1) {
1222		(void) printf("DDT histogram (aggregated over all DDTs):\n");
1223		ddt_get_dedup_histogram(spa, &ddh_total);
1224		zpool_dump_ddt(&dds_total, &ddh_total);
1225	}
1226
1227	dump_dedup_ratio(&dds_total);
1228}
1229
1230static void
1231dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1232{
1233	char *prefix = arg;
1234
1235	(void) printf("%s [%llu,%llu) length %llu\n",
1236	    prefix,
1237	    (u_longlong_t)start,
1238	    (u_longlong_t)(start + size),
1239	    (u_longlong_t)(size));
1240}
1241
1242static void
1243dump_dtl(vdev_t *vd, int indent)
1244{
1245	spa_t *spa = vd->vdev_spa;
1246	boolean_t required;
1247	const char *name[DTL_TYPES] = { "missing", "partial", "scrub",
1248		"outage" };
1249	char prefix[256];
1250
1251	spa_vdev_state_enter(spa, SCL_NONE);
1252	required = vdev_dtl_required(vd);
1253	(void) spa_vdev_state_exit(spa, NULL, 0);
1254
1255	if (indent == 0)
1256		(void) printf("\nDirty time logs:\n\n");
1257
1258	(void) printf("\t%*s%s [%s]\n", indent, "",
1259	    vd->vdev_path ? vd->vdev_path :
1260	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1261	    required ? "DTL-required" : "DTL-expendable");
1262
1263	for (int t = 0; t < DTL_TYPES; t++) {
1264		range_tree_t *rt = vd->vdev_dtl[t];
1265		if (range_tree_space(rt) == 0)
1266			continue;
1267		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1268		    indent + 2, "", name[t]);
1269		range_tree_walk(rt, dump_dtl_seg, prefix);
1270		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1271			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1272	}
1273
1274	for (unsigned c = 0; c < vd->vdev_children; c++)
1275		dump_dtl(vd->vdev_child[c], indent + 4);
1276}
1277
1278static void
1279dump_history(spa_t *spa)
1280{
1281	nvlist_t **events = NULL;
1282	uint64_t resid, len, off = 0;
1283	uint_t num = 0;
1284	int error;
1285	time_t tsec;
1286	struct tm t;
1287	char tbuf[30];
1288	char internalstr[MAXPATHLEN];
1289
1290	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
1291	do {
1292		len = SPA_MAXBLOCKSIZE;
1293
1294		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1295			(void) fprintf(stderr, "Unable to read history: "
1296			    "error %d\n", error);
1297			umem_free(buf, SPA_MAXBLOCKSIZE);
1298			return;
1299		}
1300
1301		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1302			break;
1303
1304		off -= resid;
1305	} while (len != 0);
1306	umem_free(buf, SPA_MAXBLOCKSIZE);
1307
1308	(void) printf("\nHistory:\n");
1309	for (unsigned i = 0; i < num; i++) {
1310		uint64_t time, txg, ievent;
1311		char *cmd, *intstr;
1312		boolean_t printed = B_FALSE;
1313
1314		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1315		    &time) != 0)
1316			goto next;
1317		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1318		    &cmd) != 0) {
1319			if (nvlist_lookup_uint64(events[i],
1320			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1321				goto next;
1322			verify(nvlist_lookup_uint64(events[i],
1323			    ZPOOL_HIST_TXG, &txg) == 0);
1324			verify(nvlist_lookup_string(events[i],
1325			    ZPOOL_HIST_INT_STR, &intstr) == 0);
1326			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1327				goto next;
1328
1329			(void) snprintf(internalstr,
1330			    sizeof (internalstr),
1331			    "[internal %s txg:%ju] %s",
1332			    zfs_history_event_names[ievent], (uintmax_t)txg,
1333			    intstr);
1334			cmd = internalstr;
1335		}
1336		tsec = time;
1337		(void) localtime_r(&tsec, &t);
1338		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1339		(void) printf("%s %s\n", tbuf, cmd);
1340		printed = B_TRUE;
1341
1342next:
1343		if (dump_opt['h'] > 1) {
1344			if (!printed)
1345				(void) printf("unrecognized record:\n");
1346			dump_nvlist(events[i], 2);
1347		}
1348	}
1349}
1350
1351/*ARGSUSED*/
1352static void
1353dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1354{
1355}
1356
1357static uint64_t
1358blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1359    const zbookmark_phys_t *zb)
1360{
1361	if (dnp == NULL) {
1362		ASSERT(zb->zb_level < 0);
1363		if (zb->zb_object == 0)
1364			return (zb->zb_blkid);
1365		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1366	}
1367
1368	ASSERT(zb->zb_level >= 0);
1369
1370	return ((zb->zb_blkid <<
1371	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1372	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1373}
1374
1375static void
1376snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1377{
1378	const dva_t *dva = bp->blk_dva;
1379	int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1380
1381	if (dump_opt['b'] >= 6) {
1382		snprintf_blkptr(blkbuf, buflen, bp);
1383		return;
1384	}
1385
1386	if (BP_IS_EMBEDDED(bp)) {
1387		(void) sprintf(blkbuf,
1388		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
1389		    (int)BPE_GET_ETYPE(bp),
1390		    (u_longlong_t)BPE_GET_LSIZE(bp),
1391		    (u_longlong_t)BPE_GET_PSIZE(bp),
1392		    (u_longlong_t)bp->blk_birth);
1393		return;
1394	}
1395
1396	blkbuf[0] = '\0';
1397	for (int i = 0; i < ndvas; i++)
1398		(void) snprintf(blkbuf + strlen(blkbuf),
1399		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1400		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1401		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1402		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1403
1404	if (BP_IS_HOLE(bp)) {
1405		(void) snprintf(blkbuf + strlen(blkbuf),
1406		    buflen - strlen(blkbuf),
1407		    "%llxL B=%llu",
1408		    (u_longlong_t)BP_GET_LSIZE(bp),
1409		    (u_longlong_t)bp->blk_birth);
1410	} else {
1411		(void) snprintf(blkbuf + strlen(blkbuf),
1412		    buflen - strlen(blkbuf),
1413		    "%llxL/%llxP F=%llu B=%llu/%llu",
1414		    (u_longlong_t)BP_GET_LSIZE(bp),
1415		    (u_longlong_t)BP_GET_PSIZE(bp),
1416		    (u_longlong_t)BP_GET_FILL(bp),
1417		    (u_longlong_t)bp->blk_birth,
1418		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1419	}
1420}
1421
1422static void
1423print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1424    const dnode_phys_t *dnp)
1425{
1426	char blkbuf[BP_SPRINTF_LEN];
1427	int l;
1428
1429	if (!BP_IS_EMBEDDED(bp)) {
1430		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1431		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1432	}
1433
1434	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1435
1436	ASSERT(zb->zb_level >= 0);
1437
1438	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1439		if (l == zb->zb_level) {
1440			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1441		} else {
1442			(void) printf(" ");
1443		}
1444	}
1445
1446	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1447	(void) printf("%s\n", blkbuf);
1448}
1449
1450static int
1451visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1452    blkptr_t *bp, const zbookmark_phys_t *zb)
1453{
1454	int err = 0;
1455
1456	if (bp->blk_birth == 0)
1457		return (0);
1458
1459	print_indirect(bp, zb, dnp);
1460
1461	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1462		arc_flags_t flags = ARC_FLAG_WAIT;
1463		int i;
1464		blkptr_t *cbp;
1465		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1466		arc_buf_t *buf;
1467		uint64_t fill = 0;
1468
1469		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1470		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1471		if (err)
1472			return (err);
1473		ASSERT(buf->b_data);
1474
1475		/* recursively visit blocks below this */
1476		cbp = buf->b_data;
1477		for (i = 0; i < epb; i++, cbp++) {
1478			zbookmark_phys_t czb;
1479
1480			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1481			    zb->zb_level - 1,
1482			    zb->zb_blkid * epb + i);
1483			err = visit_indirect(spa, dnp, cbp, &czb);
1484			if (err)
1485				break;
1486			fill += BP_GET_FILL(cbp);
1487		}
1488		if (!err)
1489			ASSERT3U(fill, ==, BP_GET_FILL(bp));
1490		arc_buf_destroy(buf, &buf);
1491	}
1492
1493	return (err);
1494}
1495
1496/*ARGSUSED*/
1497static void
1498dump_indirect(dnode_t *dn)
1499{
1500	dnode_phys_t *dnp = dn->dn_phys;
1501	int j;
1502	zbookmark_phys_t czb;
1503
1504	(void) printf("Indirect blocks:\n");
1505
1506	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1507	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1508	for (j = 0; j < dnp->dn_nblkptr; j++) {
1509		czb.zb_blkid = j;
1510		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1511		    &dnp->dn_blkptr[j], &czb);
1512	}
1513
1514	(void) printf("\n");
1515}
1516
1517/*ARGSUSED*/
1518static void
1519dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1520{
1521	dsl_dir_phys_t *dd = data;
1522	time_t crtime;
1523	char nice[32];
1524
1525	/* make sure nicenum has enough space */
1526	CTASSERT(sizeof (nice) >= NN_NUMBUF_SZ);
1527
1528	if (dd == NULL)
1529		return;
1530
1531	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1532
1533	crtime = dd->dd_creation_time;
1534	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1535	(void) printf("\t\thead_dataset_obj = %llu\n",
1536	    (u_longlong_t)dd->dd_head_dataset_obj);
1537	(void) printf("\t\tparent_dir_obj = %llu\n",
1538	    (u_longlong_t)dd->dd_parent_obj);
1539	(void) printf("\t\torigin_obj = %llu\n",
1540	    (u_longlong_t)dd->dd_origin_obj);
1541	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1542	    (u_longlong_t)dd->dd_child_dir_zapobj);
1543	zdb_nicenum(dd->dd_used_bytes, nice, sizeof (nice));
1544	(void) printf("\t\tused_bytes = %s\n", nice);
1545	zdb_nicenum(dd->dd_compressed_bytes, nice, sizeof (nice));
1546	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1547	zdb_nicenum(dd->dd_uncompressed_bytes, nice, sizeof (nice));
1548	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1549	zdb_nicenum(dd->dd_quota, nice, sizeof (nice));
1550	(void) printf("\t\tquota = %s\n", nice);
1551	zdb_nicenum(dd->dd_reserved, nice, sizeof (nice));
1552	(void) printf("\t\treserved = %s\n", nice);
1553	(void) printf("\t\tprops_zapobj = %llu\n",
1554	    (u_longlong_t)dd->dd_props_zapobj);
1555	(void) printf("\t\tdeleg_zapobj = %llu\n",
1556	    (u_longlong_t)dd->dd_deleg_zapobj);
1557	(void) printf("\t\tflags = %llx\n",
1558	    (u_longlong_t)dd->dd_flags);
1559
1560#define	DO(which) \
1561	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice, \
1562	    sizeof (nice)); \
1563	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1564	DO(HEAD);
1565	DO(SNAP);
1566	DO(CHILD);
1567	DO(CHILD_RSRV);
1568	DO(REFRSRV);
1569#undef DO
1570}
1571
1572/*ARGSUSED*/
1573static void
1574dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1575{
1576	dsl_dataset_phys_t *ds = data;
1577	time_t crtime;
1578	char used[32], compressed[32], uncompressed[32], unique[32];
1579	char blkbuf[BP_SPRINTF_LEN];
1580
1581	/* make sure nicenum has enough space */
1582	CTASSERT(sizeof (used) >= NN_NUMBUF_SZ);
1583	CTASSERT(sizeof (compressed) >= NN_NUMBUF_SZ);
1584	CTASSERT(sizeof (uncompressed) >= NN_NUMBUF_SZ);
1585	CTASSERT(sizeof (unique) >= NN_NUMBUF_SZ);
1586
1587	if (ds == NULL)
1588		return;
1589
1590	ASSERT(size == sizeof (*ds));
1591	crtime = ds->ds_creation_time;
1592	zdb_nicenum(ds->ds_referenced_bytes, used, sizeof (used));
1593	zdb_nicenum(ds->ds_compressed_bytes, compressed, sizeof (compressed));
1594	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed,
1595	    sizeof (uncompressed));
1596	zdb_nicenum(ds->ds_unique_bytes, unique, sizeof (unique));
1597	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1598
1599	(void) printf("\t\tdir_obj = %llu\n",
1600	    (u_longlong_t)ds->ds_dir_obj);
1601	(void) printf("\t\tprev_snap_obj = %llu\n",
1602	    (u_longlong_t)ds->ds_prev_snap_obj);
1603	(void) printf("\t\tprev_snap_txg = %llu\n",
1604	    (u_longlong_t)ds->ds_prev_snap_txg);
1605	(void) printf("\t\tnext_snap_obj = %llu\n",
1606	    (u_longlong_t)ds->ds_next_snap_obj);
1607	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1608	    (u_longlong_t)ds->ds_snapnames_zapobj);
1609	(void) printf("\t\tnum_children = %llu\n",
1610	    (u_longlong_t)ds->ds_num_children);
1611	(void) printf("\t\tuserrefs_obj = %llu\n",
1612	    (u_longlong_t)ds->ds_userrefs_obj);
1613	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1614	(void) printf("\t\tcreation_txg = %llu\n",
1615	    (u_longlong_t)ds->ds_creation_txg);
1616	(void) printf("\t\tdeadlist_obj = %llu\n",
1617	    (u_longlong_t)ds->ds_deadlist_obj);
1618	(void) printf("\t\tused_bytes = %s\n", used);
1619	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1620	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1621	(void) printf("\t\tunique = %s\n", unique);
1622	(void) printf("\t\tfsid_guid = %llu\n",
1623	    (u_longlong_t)ds->ds_fsid_guid);
1624	(void) printf("\t\tguid = %llu\n",
1625	    (u_longlong_t)ds->ds_guid);
1626	(void) printf("\t\tflags = %llx\n",
1627	    (u_longlong_t)ds->ds_flags);
1628	(void) printf("\t\tnext_clones_obj = %llu\n",
1629	    (u_longlong_t)ds->ds_next_clones_obj);
1630	(void) printf("\t\tprops_obj = %llu\n",
1631	    (u_longlong_t)ds->ds_props_obj);
1632	(void) printf("\t\tbp = %s\n", blkbuf);
1633}
1634
1635/* ARGSUSED */
1636static int
1637dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1638{
1639	char blkbuf[BP_SPRINTF_LEN];
1640
1641	if (bp->blk_birth != 0) {
1642		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1643		(void) printf("\t%s\n", blkbuf);
1644	}
1645	return (0);
1646}
1647
1648static void
1649dump_bptree(objset_t *os, uint64_t obj, const char *name)
1650{
1651	char bytes[32];
1652	bptree_phys_t *bt;
1653	dmu_buf_t *db;
1654
1655	/* make sure nicenum has enough space */
1656	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1657
1658	if (dump_opt['d'] < 3)
1659		return;
1660
1661	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1662	bt = db->db_data;
1663	zdb_nicenum(bt->bt_bytes, bytes, sizeof (bytes));
1664	(void) printf("\n    %s: %llu datasets, %s\n",
1665	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1666	dmu_buf_rele(db, FTAG);
1667
1668	if (dump_opt['d'] < 5)
1669		return;
1670
1671	(void) printf("\n");
1672
1673	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1674}
1675
1676/* ARGSUSED */
1677static int
1678dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1679{
1680	char blkbuf[BP_SPRINTF_LEN];
1681
1682	ASSERT(bp->blk_birth != 0);
1683	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1684	(void) printf("\t%s\n", blkbuf);
1685	return (0);
1686}
1687
1688static void
1689dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
1690{
1691	char bytes[32];
1692	char comp[32];
1693	char uncomp[32];
1694
1695	/* make sure nicenum has enough space */
1696	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1697	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1698	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1699
1700	if (dump_opt['d'] < 3)
1701		return;
1702
1703	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes, sizeof (bytes));
1704	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1705		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp, sizeof (comp));
1706		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp, sizeof (uncomp));
1707		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1708		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1709		    indent * 8, name,
1710		    (u_longlong_t)bpo->bpo_object,
1711		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1712		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1713		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1714		    bytes, comp, uncomp);
1715
1716		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1717			uint64_t subobj;
1718			bpobj_t subbpo;
1719			int error;
1720			VERIFY0(dmu_read(bpo->bpo_os,
1721			    bpo->bpo_phys->bpo_subobjs,
1722			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1723			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1724			if (error != 0) {
1725				(void) printf("ERROR %u while trying to open "
1726				    "subobj id %llu\n",
1727				    error, (u_longlong_t)subobj);
1728				continue;
1729			}
1730			dump_full_bpobj(&subbpo, "subobj", indent + 1);
1731			bpobj_close(&subbpo);
1732		}
1733	} else {
1734		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1735		    indent * 8, name,
1736		    (u_longlong_t)bpo->bpo_object,
1737		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1738		    bytes);
1739	}
1740
1741	if (dump_opt['d'] < 5)
1742		return;
1743
1744
1745	if (indent == 0) {
1746		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1747		(void) printf("\n");
1748	}
1749}
1750
1751static void
1752dump_deadlist(dsl_deadlist_t *dl)
1753{
1754	dsl_deadlist_entry_t *dle;
1755	uint64_t unused;
1756	char bytes[32];
1757	char comp[32];
1758	char uncomp[32];
1759
1760	/* make sure nicenum has enough space */
1761	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1762	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1763	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1764
1765	if (dump_opt['d'] < 3)
1766		return;
1767
1768	if (dl->dl_oldfmt) {
1769		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1770		return;
1771	}
1772
1773	zdb_nicenum(dl->dl_phys->dl_used, bytes, sizeof (bytes));
1774	zdb_nicenum(dl->dl_phys->dl_comp, comp, sizeof (comp));
1775	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp, sizeof (uncomp));
1776	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1777	    bytes, comp, uncomp);
1778
1779	if (dump_opt['d'] < 4)
1780		return;
1781
1782	(void) printf("\n");
1783
1784	/* force the tree to be loaded */
1785	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1786
1787	for (dle = avl_first(&dl->dl_tree); dle;
1788	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1789		if (dump_opt['d'] >= 5) {
1790			char buf[128];
1791			(void) snprintf(buf, sizeof (buf),
1792			    "mintxg %llu -> obj %llu",
1793			    (longlong_t)dle->dle_mintxg,
1794			    (longlong_t)dle->dle_bpobj.bpo_object);
1795
1796			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1797		} else {
1798			(void) printf("mintxg %llu -> obj %llu\n",
1799			    (longlong_t)dle->dle_mintxg,
1800			    (longlong_t)dle->dle_bpobj.bpo_object);
1801
1802		}
1803	}
1804}
1805
1806static avl_tree_t idx_tree;
1807static avl_tree_t domain_tree;
1808static boolean_t fuid_table_loaded;
1809static objset_t *sa_os = NULL;
1810static sa_attr_type_t *sa_attr_table = NULL;
1811
1812static int
1813open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
1814{
1815	int err;
1816	uint64_t sa_attrs = 0;
1817	uint64_t version = 0;
1818
1819	VERIFY3P(sa_os, ==, NULL);
1820	err = dmu_objset_own(path, type, B_TRUE, tag, osp);
1821	if (err != 0) {
1822		(void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
1823		    strerror(err));
1824		return (err);
1825	}
1826
1827	if (dmu_objset_type(*osp) == DMU_OST_ZFS) {
1828		(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1829		    8, 1, &version);
1830		if (version >= ZPL_VERSION_SA) {
1831			(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1832			    8, 1, &sa_attrs);
1833		}
1834		err = sa_setup(*osp, sa_attrs, zfs_attr_table, ZPL_END,
1835		    &sa_attr_table);
1836		if (err != 0) {
1837			(void) fprintf(stderr, "sa_setup failed: %s\n",
1838			    strerror(err));
1839			dmu_objset_disown(*osp, tag);
1840			*osp = NULL;
1841		}
1842	}
1843	sa_os = *osp;
1844
1845	return (0);
1846}
1847
1848static void
1849close_objset(objset_t *os, void *tag)
1850{
1851	VERIFY3P(os, ==, sa_os);
1852	if (os->os_sa != NULL)
1853		sa_tear_down(os);
1854	dmu_objset_disown(os, tag);
1855	sa_attr_table = NULL;
1856	sa_os = NULL;
1857}
1858
1859static void
1860fuid_table_destroy()
1861{
1862	if (fuid_table_loaded) {
1863		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1864		fuid_table_loaded = B_FALSE;
1865	}
1866}
1867
1868/*
1869 * print uid or gid information.
1870 * For normal POSIX id just the id is printed in decimal format.
1871 * For CIFS files with FUID the fuid is printed in hex followed by
1872 * the domain-rid string.
1873 */
1874static void
1875print_idstr(uint64_t id, const char *id_type)
1876{
1877	if (FUID_INDEX(id)) {
1878		char *domain;
1879
1880		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1881		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1882		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1883	} else {
1884		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1885	}
1886
1887}
1888
1889static void
1890dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1891{
1892	uint32_t uid_idx, gid_idx;
1893
1894	uid_idx = FUID_INDEX(uid);
1895	gid_idx = FUID_INDEX(gid);
1896
1897	/* Load domain table, if not already loaded */
1898	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1899		uint64_t fuid_obj;
1900
1901		/* first find the fuid object.  It lives in the master node */
1902		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1903		    8, 1, &fuid_obj) == 0);
1904		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1905		(void) zfs_fuid_table_load(os, fuid_obj,
1906		    &idx_tree, &domain_tree);
1907		fuid_table_loaded = B_TRUE;
1908	}
1909
1910	print_idstr(uid, "uid");
1911	print_idstr(gid, "gid");
1912}
1913
1914/*ARGSUSED*/
1915static void
1916dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1917{
1918	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
1919	sa_handle_t *hdl;
1920	uint64_t xattr, rdev, gen;
1921	uint64_t uid, gid, mode, fsize, parent, links;
1922	uint64_t pflags;
1923	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1924	time_t z_crtime, z_atime, z_mtime, z_ctime;
1925	sa_bulk_attr_t bulk[12];
1926	int idx = 0;
1927	int error;
1928
1929	VERIFY3P(os, ==, sa_os);
1930	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1931		(void) printf("Failed to get handle for SA znode\n");
1932		return;
1933	}
1934
1935	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1936	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1937	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1938	    &links, 8);
1939	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1940	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1941	    &mode, 8);
1942	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1943	    NULL, &parent, 8);
1944	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
1945	    &fsize, 8);
1946	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
1947	    acctm, 16);
1948	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
1949	    modtm, 16);
1950	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
1951	    crtm, 16);
1952	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
1953	    chgtm, 16);
1954	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
1955	    &pflags, 8);
1956
1957	if (sa_bulk_lookup(hdl, bulk, idx)) {
1958		(void) sa_handle_destroy(hdl);
1959		return;
1960	}
1961
1962	z_crtime = (time_t)crtm[0];
1963	z_atime = (time_t)acctm[0];
1964	z_mtime = (time_t)modtm[0];
1965	z_ctime = (time_t)chgtm[0];
1966
1967	if (dump_opt['d'] > 4) {
1968		error = zfs_obj_to_path(os, object, path, sizeof (path));
1969		if (error == ESTALE) {
1970			(void) snprintf(path, sizeof (path), "on delete queue");
1971		} else if (error != 0) {
1972			leaked_objects++;
1973			(void) snprintf(path, sizeof (path),
1974			    "path not found, possibly leaked");
1975		}
1976		(void) printf("\tpath	%s\n", path);
1977	}
1978	dump_uidgid(os, uid, gid);
1979	(void) printf("\tatime	%s", ctime(&z_atime));
1980	(void) printf("\tmtime	%s", ctime(&z_mtime));
1981	(void) printf("\tctime	%s", ctime(&z_ctime));
1982	(void) printf("\tcrtime	%s", ctime(&z_crtime));
1983	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
1984	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
1985	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
1986	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
1987	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
1988	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
1989	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
1990	    sizeof (uint64_t)) == 0)
1991		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
1992	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
1993	    sizeof (uint64_t)) == 0)
1994		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
1995	sa_handle_destroy(hdl);
1996}
1997
1998/*ARGSUSED*/
1999static void
2000dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
2001{
2002}
2003
2004/*ARGSUSED*/
2005static void
2006dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
2007{
2008}
2009
2010static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
2011	dump_none,		/* unallocated			*/
2012	dump_zap,		/* object directory		*/
2013	dump_uint64,		/* object array			*/
2014	dump_none,		/* packed nvlist		*/
2015	dump_packed_nvlist,	/* packed nvlist size		*/
2016	dump_none,		/* bpobj			*/
2017	dump_bpobj,		/* bpobj header			*/
2018	dump_none,		/* SPA space map header		*/
2019	dump_none,		/* SPA space map		*/
2020	dump_none,		/* ZIL intent log		*/
2021	dump_dnode,		/* DMU dnode			*/
2022	dump_dmu_objset,	/* DMU objset			*/
2023	dump_dsl_dir,		/* DSL directory		*/
2024	dump_zap,		/* DSL directory child map	*/
2025	dump_zap,		/* DSL dataset snap map		*/
2026	dump_zap,		/* DSL props			*/
2027	dump_dsl_dataset,	/* DSL dataset			*/
2028	dump_znode,		/* ZFS znode			*/
2029	dump_acl,		/* ZFS V0 ACL			*/
2030	dump_uint8,		/* ZFS plain file		*/
2031	dump_zpldir,		/* ZFS directory		*/
2032	dump_zap,		/* ZFS master node		*/
2033	dump_zap,		/* ZFS delete queue		*/
2034	dump_uint8,		/* zvol object			*/
2035	dump_zap,		/* zvol prop			*/
2036	dump_uint8,		/* other uint8[]		*/
2037	dump_uint64,		/* other uint64[]		*/
2038	dump_zap,		/* other ZAP			*/
2039	dump_zap,		/* persistent error log		*/
2040	dump_uint8,		/* SPA history			*/
2041	dump_history_offsets,	/* SPA history offsets		*/
2042	dump_zap,		/* Pool properties		*/
2043	dump_zap,		/* DSL permissions		*/
2044	dump_acl,		/* ZFS ACL			*/
2045	dump_uint8,		/* ZFS SYSACL			*/
2046	dump_none,		/* FUID nvlist			*/
2047	dump_packed_nvlist,	/* FUID nvlist size		*/
2048	dump_zap,		/* DSL dataset next clones	*/
2049	dump_zap,		/* DSL scrub queue		*/
2050	dump_zap,		/* ZFS user/group used		*/
2051	dump_zap,		/* ZFS user/group quota		*/
2052	dump_zap,		/* snapshot refcount tags	*/
2053	dump_ddt_zap,		/* DDT ZAP object		*/
2054	dump_zap,		/* DDT statistics		*/
2055	dump_znode,		/* SA object			*/
2056	dump_zap,		/* SA Master Node		*/
2057	dump_sa_attrs,		/* SA attribute registration	*/
2058	dump_sa_layouts,	/* SA attribute layouts		*/
2059	dump_zap,		/* DSL scrub translations	*/
2060	dump_none,		/* fake dedup BP		*/
2061	dump_zap,		/* deadlist			*/
2062	dump_none,		/* deadlist hdr			*/
2063	dump_zap,		/* dsl clones			*/
2064	dump_bpobj_subobjs,	/* bpobj subobjs		*/
2065	dump_unknown,		/* Unknown type, must be last	*/
2066};
2067
2068static void
2069dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
2070{
2071	dmu_buf_t *db = NULL;
2072	dmu_object_info_t doi;
2073	dnode_t *dn;
2074	void *bonus = NULL;
2075	size_t bsize = 0;
2076	char iblk[32], dblk[32], lsize[32], asize[32], fill[32];
2077	char bonus_size[32];
2078	char aux[50];
2079	int error;
2080
2081	/* make sure nicenum has enough space */
2082	CTASSERT(sizeof (iblk) >= NN_NUMBUF_SZ);
2083	CTASSERT(sizeof (dblk) >= NN_NUMBUF_SZ);
2084	CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
2085	CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
2086	CTASSERT(sizeof (bonus_size) >= NN_NUMBUF_SZ);
2087
2088	if (*print_header) {
2089		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
2090		    "Object", "lvl", "iblk", "dblk", "dsize", "lsize",
2091		    "%full", "type");
2092		*print_header = 0;
2093	}
2094
2095	if (object == 0) {
2096		dn = DMU_META_DNODE(os);
2097	} else {
2098		error = dmu_bonus_hold(os, object, FTAG, &db);
2099		if (error)
2100			fatal("dmu_bonus_hold(%llu) failed, errno %u",
2101			    object, error);
2102		bonus = db->db_data;
2103		bsize = db->db_size;
2104		dn = DB_DNODE((dmu_buf_impl_t *)db);
2105	}
2106	dmu_object_info_from_dnode(dn, &doi);
2107
2108	zdb_nicenum(doi.doi_metadata_block_size, iblk, sizeof (iblk));
2109	zdb_nicenum(doi.doi_data_block_size, dblk, sizeof (dblk));
2110	zdb_nicenum(doi.doi_max_offset, lsize, sizeof (lsize));
2111	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize, sizeof (asize));
2112	zdb_nicenum(doi.doi_bonus_size, bonus_size, sizeof (bonus_size));
2113	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
2114	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
2115	    doi.doi_max_offset);
2116
2117	aux[0] = '\0';
2118
2119	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
2120		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
2121		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
2122	}
2123
2124	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
2125		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
2126		    ZDB_COMPRESS_NAME(doi.doi_compress));
2127	}
2128
2129	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %6s  %s%s\n",
2130	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk,
2131	    asize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
2132
2133	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
2134		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
2135		    "", "", "", "", "", bonus_size, "bonus",
2136		    ZDB_OT_NAME(doi.doi_bonus_type));
2137	}
2138
2139	if (verbosity >= 4) {
2140		(void) printf("\tdnode flags: %s%s%s\n",
2141		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
2142		    "USED_BYTES " : "",
2143		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
2144		    "USERUSED_ACCOUNTED " : "",
2145		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
2146		    "SPILL_BLKPTR" : "");
2147		(void) printf("\tdnode maxblkid: %llu\n",
2148		    (longlong_t)dn->dn_phys->dn_maxblkid);
2149
2150		object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
2151		    bonus, bsize);
2152		object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
2153		*print_header = 1;
2154	}
2155
2156	if (verbosity >= 5)
2157		dump_indirect(dn);
2158
2159	if (verbosity >= 5) {
2160		/*
2161		 * Report the list of segments that comprise the object.
2162		 */
2163		uint64_t start = 0;
2164		uint64_t end;
2165		uint64_t blkfill = 1;
2166		int minlvl = 1;
2167
2168		if (dn->dn_type == DMU_OT_DNODE) {
2169			minlvl = 0;
2170			blkfill = DNODES_PER_BLOCK;
2171		}
2172
2173		for (;;) {
2174			char segsize[32];
2175			/* make sure nicenum has enough space */
2176			CTASSERT(sizeof (segsize) >= NN_NUMBUF_SZ);
2177			error = dnode_next_offset(dn,
2178			    0, &start, minlvl, blkfill, 0);
2179			if (error)
2180				break;
2181			end = start;
2182			error = dnode_next_offset(dn,
2183			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
2184			zdb_nicenum(end - start, segsize, sizeof (segsize));
2185			(void) printf("\t\tsegment [%016llx, %016llx)"
2186			    " size %5s\n", (u_longlong_t)start,
2187			    (u_longlong_t)end, segsize);
2188			if (error)
2189				break;
2190			start = end;
2191		}
2192	}
2193
2194	if (db != NULL)
2195		dmu_buf_rele(db, FTAG);
2196}
2197
2198static const char *objset_types[DMU_OST_NUMTYPES] = {
2199	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
2200
2201static void
2202dump_dir(objset_t *os)
2203{
2204	dmu_objset_stats_t dds;
2205	uint64_t object, object_count;
2206	uint64_t refdbytes, usedobjs, scratch;
2207	char numbuf[32];
2208	char blkbuf[BP_SPRINTF_LEN + 20];
2209	char osname[ZFS_MAX_DATASET_NAME_LEN];
2210	const char *type = "UNKNOWN";
2211	int verbosity = dump_opt['d'];
2212	int print_header = 1;
2213	unsigned i;
2214	int error;
2215
2216	/* make sure nicenum has enough space */
2217	CTASSERT(sizeof (numbuf) >= NN_NUMBUF_SZ);
2218
2219	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
2220	dmu_objset_fast_stat(os, &dds);
2221	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
2222
2223	if (dds.dds_type < DMU_OST_NUMTYPES)
2224		type = objset_types[dds.dds_type];
2225
2226	if (dds.dds_type == DMU_OST_META) {
2227		dds.dds_creation_txg = TXG_INITIAL;
2228		usedobjs = BP_GET_FILL(os->os_rootbp);
2229		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
2230		    dd_used_bytes;
2231	} else {
2232		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
2233	}
2234
2235	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
2236
2237	zdb_nicenum(refdbytes, numbuf, sizeof (numbuf));
2238
2239	if (verbosity >= 4) {
2240		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
2241		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
2242		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
2243	} else {
2244		blkbuf[0] = '\0';
2245	}
2246
2247	dmu_objset_name(os, osname);
2248
2249	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
2250	    "%s, %llu objects%s\n",
2251	    osname, type, (u_longlong_t)dmu_objset_id(os),
2252	    (u_longlong_t)dds.dds_creation_txg,
2253	    numbuf, (u_longlong_t)usedobjs, blkbuf);
2254
2255	if (zopt_objects != 0) {
2256		for (i = 0; i < zopt_objects; i++)
2257			dump_object(os, zopt_object[i], verbosity,
2258			    &print_header);
2259		(void) printf("\n");
2260		return;
2261	}
2262
2263	if (dump_opt['i'] != 0 || verbosity >= 2)
2264		dump_intent_log(dmu_objset_zil(os));
2265
2266	if (dmu_objset_ds(os) != NULL) {
2267		dsl_dataset_t *ds = dmu_objset_ds(os);
2268		dump_deadlist(&ds->ds_deadlist);
2269
2270		if (dsl_dataset_remap_deadlist_exists(ds)) {
2271			(void) printf("ds_remap_deadlist:\n");
2272			dump_deadlist(&ds->ds_remap_deadlist);
2273		}
2274	}
2275
2276	if (verbosity < 2)
2277		return;
2278
2279	if (BP_IS_HOLE(os->os_rootbp))
2280		return;
2281
2282	dump_object(os, 0, verbosity, &print_header);
2283	object_count = 0;
2284	if (DMU_USERUSED_DNODE(os) != NULL &&
2285	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
2286		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header);
2287		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header);
2288	}
2289
2290	object = 0;
2291	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2292		dump_object(os, object, verbosity, &print_header);
2293		object_count++;
2294	}
2295
2296	ASSERT3U(object_count, ==, usedobjs);
2297
2298	(void) printf("\n");
2299
2300	if (error != ESRCH) {
2301		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2302		abort();
2303	}
2304	if (leaked_objects != 0) {
2305		(void) printf("%d potentially leaked objects detected\n",
2306		    leaked_objects);
2307		leaked_objects = 0;
2308	}
2309}
2310
2311static void
2312dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2313{
2314	time_t timestamp = ub->ub_timestamp;
2315
2316	(void) printf("%s", header ? header : "");
2317	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2318	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2319	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2320	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2321	(void) printf("\ttimestamp = %llu UTC = %s",
2322	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2323	if (dump_opt['u'] >= 3) {
2324		char blkbuf[BP_SPRINTF_LEN];
2325		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2326		(void) printf("\trootbp = %s\n", blkbuf);
2327	}
2328	(void) printf("\tcheckpoint_txg = %llu\n",
2329	    (u_longlong_t)ub->ub_checkpoint_txg);
2330	(void) printf("%s", footer ? footer : "");
2331}
2332
2333static void
2334dump_config(spa_t *spa)
2335{
2336	dmu_buf_t *db;
2337	size_t nvsize = 0;
2338	int error = 0;
2339
2340
2341	error = dmu_bonus_hold(spa->spa_meta_objset,
2342	    spa->spa_config_object, FTAG, &db);
2343
2344	if (error == 0) {
2345		nvsize = *(uint64_t *)db->db_data;
2346		dmu_buf_rele(db, FTAG);
2347
2348		(void) printf("\nMOS Configuration:\n");
2349		dump_packed_nvlist(spa->spa_meta_objset,
2350		    spa->spa_config_object, (void *)&nvsize, 1);
2351	} else {
2352		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2353		    (u_longlong_t)spa->spa_config_object, error);
2354	}
2355}
2356
2357static void
2358dump_cachefile(const char *cachefile)
2359{
2360	int fd;
2361	struct stat64 statbuf;
2362	char *buf;
2363	nvlist_t *config;
2364
2365	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2366		(void) printf("cannot open '%s': %s\n", cachefile,
2367		    strerror(errno));
2368		exit(1);
2369	}
2370
2371	if (fstat64(fd, &statbuf) != 0) {
2372		(void) printf("failed to stat '%s': %s\n", cachefile,
2373		    strerror(errno));
2374		exit(1);
2375	}
2376
2377	if ((buf = malloc(statbuf.st_size)) == NULL) {
2378		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
2379		    (u_longlong_t)statbuf.st_size);
2380		exit(1);
2381	}
2382
2383	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2384		(void) fprintf(stderr, "failed to read %llu bytes\n",
2385		    (u_longlong_t)statbuf.st_size);
2386		exit(1);
2387	}
2388
2389	(void) close(fd);
2390
2391	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2392		(void) fprintf(stderr, "failed to unpack nvlist\n");
2393		exit(1);
2394	}
2395
2396	free(buf);
2397
2398	dump_nvlist(config, 0);
2399
2400	nvlist_free(config);
2401}
2402
2403#define	ZDB_MAX_UB_HEADER_SIZE 32
2404
2405static void
2406dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2407{
2408	vdev_t vd;
2409	vdev_t *vdp = &vd;
2410	char header[ZDB_MAX_UB_HEADER_SIZE];
2411
2412	vd.vdev_ashift = ashift;
2413	vdp->vdev_top = vdp;
2414
2415	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2416		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2417		uberblock_t *ub = (void *)((char *)lbl + uoff);
2418
2419		if (uberblock_verify(ub))
2420			continue;
2421		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2422		    "Uberblock[%d]\n", i);
2423		dump_uberblock(ub, header, "");
2424	}
2425}
2426
2427static char curpath[PATH_MAX];
2428
2429/*
2430 * Iterate through the path components, recursively passing
2431 * current one's obj and remaining path until we find the obj
2432 * for the last one.
2433 */
2434static int
2435dump_path_impl(objset_t *os, uint64_t obj, char *name)
2436{
2437	int err;
2438	int header = 1;
2439	uint64_t child_obj;
2440	char *s;
2441	dmu_buf_t *db;
2442	dmu_object_info_t doi;
2443
2444	if ((s = strchr(name, '/')) != NULL)
2445		*s = '\0';
2446	err = zap_lookup(os, obj, name, 8, 1, &child_obj);
2447
2448	(void) strlcat(curpath, name, sizeof (curpath));
2449
2450	if (err != 0) {
2451		(void) fprintf(stderr, "failed to lookup %s: %s\n",
2452		    curpath, strerror(err));
2453		return (err);
2454	}
2455
2456	child_obj = ZFS_DIRENT_OBJ(child_obj);
2457	err = sa_buf_hold(os, child_obj, FTAG, &db);
2458	if (err != 0) {
2459		(void) fprintf(stderr,
2460		    "failed to get SA dbuf for obj %llu: %s\n",
2461		    (u_longlong_t)child_obj, strerror(err));
2462		return (EINVAL);
2463	}
2464	dmu_object_info_from_db(db, &doi);
2465	sa_buf_rele(db, FTAG);
2466
2467	if (doi.doi_bonus_type != DMU_OT_SA &&
2468	    doi.doi_bonus_type != DMU_OT_ZNODE) {
2469		(void) fprintf(stderr, "invalid bonus type %d for obj %llu\n",
2470		    doi.doi_bonus_type, (u_longlong_t)child_obj);
2471		return (EINVAL);
2472	}
2473
2474	if (dump_opt['v'] > 6) {
2475		(void) printf("obj=%llu %s type=%d bonustype=%d\n",
2476		    (u_longlong_t)child_obj, curpath, doi.doi_type,
2477		    doi.doi_bonus_type);
2478	}
2479
2480	(void) strlcat(curpath, "/", sizeof (curpath));
2481
2482	switch (doi.doi_type) {
2483	case DMU_OT_DIRECTORY_CONTENTS:
2484		if (s != NULL && *(s + 1) != '\0')
2485			return (dump_path_impl(os, child_obj, s + 1));
2486		/*FALLTHROUGH*/
2487	case DMU_OT_PLAIN_FILE_CONTENTS:
2488		dump_object(os, child_obj, dump_opt['v'], &header);
2489		return (0);
2490	default:
2491		(void) fprintf(stderr, "object %llu has non-file/directory "
2492		    "type %d\n", (u_longlong_t)obj, doi.doi_type);
2493		break;
2494	}
2495
2496	return (EINVAL);
2497}
2498
2499/*
2500 * Dump the blocks for the object specified by path inside the dataset.
2501 */
2502static int
2503dump_path(char *ds, char *path)
2504{
2505	int err;
2506	objset_t *os;
2507	uint64_t root_obj;
2508
2509	err = open_objset(ds, DMU_OST_ZFS, FTAG, &os);
2510	if (err != 0)
2511		return (err);
2512
2513	err = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &root_obj);
2514	if (err != 0) {
2515		(void) fprintf(stderr, "can't lookup root znode: %s\n",
2516		    strerror(err));
2517		dmu_objset_disown(os, FTAG);
2518		return (EINVAL);
2519	}
2520
2521	(void) snprintf(curpath, sizeof (curpath), "dataset=%s path=/", ds);
2522
2523	err = dump_path_impl(os, root_obj, path);
2524
2525	close_objset(os, FTAG);
2526	return (err);
2527}
2528
2529static int
2530dump_label(const char *dev)
2531{
2532	int fd;
2533	vdev_label_t label;
2534	char path[MAXPATHLEN];
2535	char *buf = label.vl_vdev_phys.vp_nvlist;
2536	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2537	struct stat64 statbuf;
2538	uint64_t psize, ashift;
2539	boolean_t label_found = B_FALSE;
2540
2541	(void) strlcpy(path, dev, sizeof (path));
2542	if (dev[0] == '/') {
2543		if (strncmp(dev, ZFS_DISK_ROOTD,
2544		    strlen(ZFS_DISK_ROOTD)) == 0) {
2545			(void) snprintf(path, sizeof (path), "%s%s",
2546			    ZFS_RDISK_ROOTD, dev + strlen(ZFS_DISK_ROOTD));
2547		}
2548	} else if (stat64(path, &statbuf) != 0) {
2549		char *s;
2550
2551		(void) snprintf(path, sizeof (path), "%s%s", ZFS_RDISK_ROOTD,
2552		    dev);
2553		if (((s = strrchr(dev, 's')) == NULL &&
2554		    (s = strchr(dev, 'p')) == NULL) ||
2555		    !isdigit(*(s + 1)))
2556			(void) strlcat(path, "s0", sizeof (path));
2557	}
2558
2559	if ((fd = open64(path, O_RDONLY)) < 0) {
2560		(void) fprintf(stderr, "cannot open '%s': %s\n", path,
2561		    strerror(errno));
2562		exit(1);
2563	}
2564
2565	if (fstat64(fd, &statbuf) != 0) {
2566		(void) fprintf(stderr, "failed to stat '%s': %s\n", path,
2567		    strerror(errno));
2568		(void) close(fd);
2569		exit(1);
2570	}
2571
2572	if (S_ISBLK(statbuf.st_mode)) {
2573		(void) fprintf(stderr,
2574		    "cannot use '%s': character device required\n", path);
2575		(void) close(fd);
2576		exit(1);
2577	}
2578
2579	psize = statbuf.st_size;
2580	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2581
2582	for (int l = 0; l < VDEV_LABELS; l++) {
2583		nvlist_t *config = NULL;
2584
2585		if (!dump_opt['q']) {
2586			(void) printf("------------------------------------\n");
2587			(void) printf("LABEL %d\n", l);
2588			(void) printf("------------------------------------\n");
2589		}
2590
2591		if (pread64(fd, &label, sizeof (label),
2592		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2593			if (!dump_opt['q'])
2594				(void) printf("failed to read label %d\n", l);
2595			continue;
2596		}
2597
2598		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2599			if (!dump_opt['q'])
2600				(void) printf("failed to unpack label %d\n", l);
2601			ashift = SPA_MINBLOCKSHIFT;
2602		} else {
2603			nvlist_t *vdev_tree = NULL;
2604
2605			if (!dump_opt['q'])
2606				dump_nvlist(config, 4);
2607			if ((nvlist_lookup_nvlist(config,
2608			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2609			    (nvlist_lookup_uint64(vdev_tree,
2610			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2611				ashift = SPA_MINBLOCKSHIFT;
2612			nvlist_free(config);
2613			label_found = B_TRUE;
2614		}
2615		if (dump_opt['u'])
2616			dump_label_uberblocks(&label, ashift);
2617	}
2618
2619	(void) close(fd);
2620
2621	return (label_found ? 0 : 2);
2622}
2623
2624static uint64_t dataset_feature_count[SPA_FEATURES];
2625static uint64_t remap_deadlist_count = 0;
2626
2627/*ARGSUSED*/
2628static int
2629dump_one_dir(const char *dsname, void *arg)
2630{
2631	int error;
2632	objset_t *os;
2633
2634	error = open_objset(dsname, DMU_OST_ANY, FTAG, &os);
2635	if (error != 0)
2636		return (0);
2637
2638	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
2639		if (!dmu_objset_ds(os)->ds_feature_inuse[f])
2640			continue;
2641		ASSERT(spa_feature_table[f].fi_flags &
2642		    ZFEATURE_FLAG_PER_DATASET);
2643		dataset_feature_count[f]++;
2644	}
2645
2646	if (dsl_dataset_remap_deadlist_exists(dmu_objset_ds(os))) {
2647		remap_deadlist_count++;
2648	}
2649
2650	dump_dir(os);
2651	close_objset(os, FTAG);
2652	fuid_table_destroy();
2653	return (0);
2654}
2655
2656/*
2657 * Block statistics.
2658 */
2659#define	PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2660typedef struct zdb_blkstats {
2661	uint64_t zb_asize;
2662	uint64_t zb_lsize;
2663	uint64_t zb_psize;
2664	uint64_t zb_count;
2665	uint64_t zb_gangs;
2666	uint64_t zb_ditto_samevdev;
2667	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2668} zdb_blkstats_t;
2669
2670/*
2671 * Extended object types to report deferred frees and dedup auto-ditto blocks.
2672 */
2673#define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
2674#define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
2675#define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
2676#define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
2677
2678static const char *zdb_ot_extname[] = {
2679	"deferred free",
2680	"dedup ditto",
2681	"other",
2682	"Total",
2683};
2684
2685#define	ZB_TOTAL	DN_MAX_LEVELS
2686
2687typedef struct zdb_cb {
2688	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2689	uint64_t	zcb_removing_size;
2690	uint64_t	zcb_checkpoint_size;
2691	uint64_t	zcb_dedup_asize;
2692	uint64_t	zcb_dedup_blocks;
2693	uint64_t	zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2694	uint64_t	zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2695	    [BPE_PAYLOAD_SIZE];
2696	uint64_t	zcb_start;
2697	hrtime_t	zcb_lastprint;
2698	uint64_t	zcb_totalasize;
2699	uint64_t	zcb_errors[256];
2700	int		zcb_readfails;
2701	int		zcb_haderrors;
2702	spa_t		*zcb_spa;
2703	uint32_t	**zcb_vd_obsolete_counts;
2704} zdb_cb_t;
2705
2706static void
2707zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2708    dmu_object_type_t type)
2709{
2710	uint64_t refcnt = 0;
2711
2712	ASSERT(type < ZDB_OT_TOTAL);
2713
2714	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2715		return;
2716
2717	for (int i = 0; i < 4; i++) {
2718		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2719		int t = (i & 1) ? type : ZDB_OT_TOTAL;
2720		int equal;
2721		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2722
2723		zb->zb_asize += BP_GET_ASIZE(bp);
2724		zb->zb_lsize += BP_GET_LSIZE(bp);
2725		zb->zb_psize += BP_GET_PSIZE(bp);
2726		zb->zb_count++;
2727
2728		/*
2729		 * The histogram is only big enough to record blocks up to
2730		 * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2731		 * "other", bucket.
2732		 */
2733		unsigned idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2734		idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2735		zb->zb_psize_histogram[idx]++;
2736
2737		zb->zb_gangs += BP_COUNT_GANG(bp);
2738
2739		switch (BP_GET_NDVAS(bp)) {
2740		case 2:
2741			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2742			    DVA_GET_VDEV(&bp->blk_dva[1]))
2743				zb->zb_ditto_samevdev++;
2744			break;
2745		case 3:
2746			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2747			    DVA_GET_VDEV(&bp->blk_dva[1])) +
2748			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2749			    DVA_GET_VDEV(&bp->blk_dva[2])) +
2750			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2751			    DVA_GET_VDEV(&bp->blk_dva[2]));
2752			if (equal != 0)
2753				zb->zb_ditto_samevdev++;
2754			break;
2755		}
2756
2757	}
2758
2759	if (BP_IS_EMBEDDED(bp)) {
2760		zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2761		zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2762		    [BPE_GET_PSIZE(bp)]++;
2763		return;
2764	}
2765
2766	if (dump_opt['L'])
2767		return;
2768
2769	if (BP_GET_DEDUP(bp)) {
2770		ddt_t *ddt;
2771		ddt_entry_t *dde;
2772
2773		ddt = ddt_select(zcb->zcb_spa, bp);
2774		ddt_enter(ddt);
2775		dde = ddt_lookup(ddt, bp, B_FALSE);
2776
2777		if (dde == NULL) {
2778			refcnt = 0;
2779		} else {
2780			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2781			ddt_phys_decref(ddp);
2782			refcnt = ddp->ddp_refcnt;
2783			if (ddt_phys_total_refcnt(dde) == 0)
2784				ddt_remove(ddt, dde);
2785		}
2786		ddt_exit(ddt);
2787	}
2788
2789	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2790	    refcnt ? 0 : spa_min_claim_txg(zcb->zcb_spa),
2791	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2792}
2793
2794static void
2795zdb_blkptr_done(zio_t *zio)
2796{
2797	spa_t *spa = zio->io_spa;
2798	blkptr_t *bp = zio->io_bp;
2799	int ioerr = zio->io_error;
2800	zdb_cb_t *zcb = zio->io_private;
2801	zbookmark_phys_t *zb = &zio->io_bookmark;
2802
2803	abd_free(zio->io_abd);
2804
2805	mutex_enter(&spa->spa_scrub_lock);
2806	spa->spa_scrub_inflight--;
2807	cv_broadcast(&spa->spa_scrub_io_cv);
2808
2809	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
2810		char blkbuf[BP_SPRINTF_LEN];
2811
2812		zcb->zcb_haderrors = 1;
2813		zcb->zcb_errors[ioerr]++;
2814
2815		if (dump_opt['b'] >= 2)
2816			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2817		else
2818			blkbuf[0] = '\0';
2819
2820		(void) printf("zdb_blkptr_cb: "
2821		    "Got error %d reading "
2822		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
2823		    ioerr,
2824		    (u_longlong_t)zb->zb_objset,
2825		    (u_longlong_t)zb->zb_object,
2826		    (u_longlong_t)zb->zb_level,
2827		    (u_longlong_t)zb->zb_blkid,
2828		    blkbuf);
2829	}
2830	mutex_exit(&spa->spa_scrub_lock);
2831}
2832
2833static int
2834zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2835    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2836{
2837	zdb_cb_t *zcb = arg;
2838	dmu_object_type_t type;
2839	boolean_t is_metadata;
2840
2841	if (bp == NULL)
2842		return (0);
2843
2844	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
2845		char blkbuf[BP_SPRINTF_LEN];
2846		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2847		(void) printf("objset %llu object %llu "
2848		    "level %lld offset 0x%llx %s\n",
2849		    (u_longlong_t)zb->zb_objset,
2850		    (u_longlong_t)zb->zb_object,
2851		    (longlong_t)zb->zb_level,
2852		    (u_longlong_t)blkid2offset(dnp, bp, zb),
2853		    blkbuf);
2854	}
2855
2856	if (BP_IS_HOLE(bp))
2857		return (0);
2858
2859	type = BP_GET_TYPE(bp);
2860
2861	zdb_count_block(zcb, zilog, bp,
2862	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
2863
2864	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
2865
2866	if (!BP_IS_EMBEDDED(bp) &&
2867	    (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
2868		size_t size = BP_GET_PSIZE(bp);
2869		abd_t *abd = abd_alloc(size, B_FALSE);
2870		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
2871
2872		/* If it's an intent log block, failure is expected. */
2873		if (zb->zb_level == ZB_ZIL_LEVEL)
2874			flags |= ZIO_FLAG_SPECULATIVE;
2875
2876		mutex_enter(&spa->spa_scrub_lock);
2877		while (spa->spa_scrub_inflight > max_inflight)
2878			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
2879		spa->spa_scrub_inflight++;
2880		mutex_exit(&spa->spa_scrub_lock);
2881
2882		zio_nowait(zio_read(NULL, spa, bp, abd, size,
2883		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
2884	}
2885
2886	zcb->zcb_readfails = 0;
2887
2888	/* only call gethrtime() every 100 blocks */
2889	static int iters;
2890	if (++iters > 100)
2891		iters = 0;
2892	else
2893		return (0);
2894
2895	if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
2896		uint64_t now = gethrtime();
2897		char buf[10];
2898		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
2899		int kb_per_sec =
2900		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
2901		int sec_remaining =
2902		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
2903
2904		/* make sure nicenum has enough space */
2905		CTASSERT(sizeof (buf) >= NN_NUMBUF_SZ);
2906
2907		zfs_nicenum(bytes, buf, sizeof (buf));
2908		(void) fprintf(stderr,
2909		    "\r%5s completed (%4dMB/s) "
2910		    "estimated time remaining: %uhr %02umin %02usec        ",
2911		    buf, kb_per_sec / 1024,
2912		    sec_remaining / 60 / 60,
2913		    sec_remaining / 60 % 60,
2914		    sec_remaining % 60);
2915
2916		zcb->zcb_lastprint = now;
2917	}
2918
2919	return (0);
2920}
2921
2922static void
2923zdb_leak(void *arg, uint64_t start, uint64_t size)
2924{
2925	vdev_t *vd = arg;
2926
2927	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
2928	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
2929}
2930
2931static metaslab_ops_t zdb_metaslab_ops = {
2932	NULL	/* alloc */
2933};
2934
2935static void
2936zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
2937{
2938	ddt_bookmark_t ddb;
2939	ddt_entry_t dde;
2940	int error;
2941
2942	bzero(&ddb, sizeof (ddb));
2943	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
2944		blkptr_t blk;
2945		ddt_phys_t *ddp = dde.dde_phys;
2946
2947		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
2948			return;
2949
2950		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
2951
2952		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
2953			if (ddp->ddp_phys_birth == 0)
2954				continue;
2955			ddt_bp_create(ddb.ddb_checksum,
2956			    &dde.dde_key, ddp, &blk);
2957			if (p == DDT_PHYS_DITTO) {
2958				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
2959			} else {
2960				zcb->zcb_dedup_asize +=
2961				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
2962				zcb->zcb_dedup_blocks++;
2963			}
2964		}
2965		if (!dump_opt['L']) {
2966			ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
2967			ddt_enter(ddt);
2968			VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
2969			ddt_exit(ddt);
2970		}
2971	}
2972
2973	ASSERT(error == ENOENT);
2974}
2975
2976/* ARGSUSED */
2977static void
2978claim_segment_impl_cb(uint64_t inner_offset, vdev_t *vd, uint64_t offset,
2979    uint64_t size, void *arg)
2980{
2981	/*
2982	 * This callback was called through a remap from
2983	 * a device being removed. Therefore, the vdev that
2984	 * this callback is applied to is a concrete
2985	 * vdev.
2986	 */
2987	ASSERT(vdev_is_concrete(vd));
2988
2989	VERIFY0(metaslab_claim_impl(vd, offset, size,
2990	    spa_min_claim_txg(vd->vdev_spa)));
2991}
2992
2993static void
2994claim_segment_cb(void *arg, uint64_t offset, uint64_t size)
2995{
2996	vdev_t *vd = arg;
2997
2998	vdev_indirect_ops.vdev_op_remap(vd, offset, size,
2999	    claim_segment_impl_cb, NULL);
3000}
3001
3002/*
3003 * After accounting for all allocated blocks that are directly referenced,
3004 * we might have missed a reference to a block from a partially complete
3005 * (and thus unused) indirect mapping object. We perform a secondary pass
3006 * through the metaslabs we have already mapped and claim the destination
3007 * blocks.
3008 */
3009static void
3010zdb_claim_removing(spa_t *spa, zdb_cb_t *zcb)
3011{
3012	if (spa->spa_vdev_removal == NULL)
3013		return;
3014
3015	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3016
3017	spa_vdev_removal_t *svr = spa->spa_vdev_removal;
3018	vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id);
3019	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3020
3021	for (uint64_t msi = 0; msi < vd->vdev_ms_count; msi++) {
3022		metaslab_t *msp = vd->vdev_ms[msi];
3023
3024		if (msp->ms_start >= vdev_indirect_mapping_max_offset(vim))
3025			break;
3026
3027		ASSERT0(range_tree_space(svr->svr_allocd_segs));
3028
3029		if (msp->ms_sm != NULL) {
3030			VERIFY0(space_map_load(msp->ms_sm,
3031			    svr->svr_allocd_segs, SM_ALLOC));
3032
3033			/*
3034			 * Clear everything past what has been synced unless
3035			 * it's past the spacemap, because we have not allocated
3036			 * mappings for it yet.
3037			 */
3038			uint64_t vim_max_offset =
3039			    vdev_indirect_mapping_max_offset(vim);
3040			uint64_t sm_end = msp->ms_sm->sm_start +
3041			    msp->ms_sm->sm_size;
3042			if (sm_end > vim_max_offset)
3043				range_tree_clear(svr->svr_allocd_segs,
3044				    vim_max_offset, sm_end - vim_max_offset);
3045		}
3046
3047		zcb->zcb_removing_size +=
3048		    range_tree_space(svr->svr_allocd_segs);
3049		range_tree_vacate(svr->svr_allocd_segs, claim_segment_cb, vd);
3050	}
3051
3052	spa_config_exit(spa, SCL_CONFIG, FTAG);
3053}
3054
3055/* ARGSUSED */
3056static int
3057increment_indirect_mapping_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3058{
3059	zdb_cb_t *zcb = arg;
3060	spa_t *spa = zcb->zcb_spa;
3061	vdev_t *vd;
3062	const dva_t *dva = &bp->blk_dva[0];
3063
3064	ASSERT(!dump_opt['L']);
3065	ASSERT3U(BP_GET_NDVAS(bp), ==, 1);
3066
3067	spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
3068	vd = vdev_lookup_top(zcb->zcb_spa, DVA_GET_VDEV(dva));
3069	ASSERT3P(vd, !=, NULL);
3070	spa_config_exit(spa, SCL_VDEV, FTAG);
3071
3072	ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0);
3073	ASSERT3P(zcb->zcb_vd_obsolete_counts[vd->vdev_id], !=, NULL);
3074
3075	vdev_indirect_mapping_increment_obsolete_count(
3076	    vd->vdev_indirect_mapping,
3077	    DVA_GET_OFFSET(dva), DVA_GET_ASIZE(dva),
3078	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3079
3080	return (0);
3081}
3082
3083static uint32_t *
3084zdb_load_obsolete_counts(vdev_t *vd)
3085{
3086	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3087	spa_t *spa = vd->vdev_spa;
3088	spa_condensing_indirect_phys_t *scip =
3089	    &spa->spa_condensing_indirect_phys;
3090	uint32_t *counts;
3091
3092	EQUIV(vdev_obsolete_sm_object(vd) != 0, vd->vdev_obsolete_sm != NULL);
3093	counts = vdev_indirect_mapping_load_obsolete_counts(vim);
3094	if (vd->vdev_obsolete_sm != NULL) {
3095		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3096		    vd->vdev_obsolete_sm);
3097	}
3098	if (scip->scip_vdev == vd->vdev_id &&
3099	    scip->scip_prev_obsolete_sm_object != 0) {
3100		space_map_t *prev_obsolete_sm = NULL;
3101		VERIFY0(space_map_open(&prev_obsolete_sm, spa->spa_meta_objset,
3102		    scip->scip_prev_obsolete_sm_object, 0, vd->vdev_asize, 0));
3103		space_map_update(prev_obsolete_sm);
3104		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3105		    prev_obsolete_sm);
3106		space_map_close(prev_obsolete_sm);
3107	}
3108	return (counts);
3109}
3110
3111typedef struct checkpoint_sm_exclude_entry_arg {
3112	vdev_t *cseea_vd;
3113	uint64_t cseea_checkpoint_size;
3114} checkpoint_sm_exclude_entry_arg_t;
3115
3116static int
3117checkpoint_sm_exclude_entry_cb(space_map_entry_t *sme, void *arg)
3118{
3119	checkpoint_sm_exclude_entry_arg_t *cseea = arg;
3120	vdev_t *vd = cseea->cseea_vd;
3121	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
3122	uint64_t end = sme->sme_offset + sme->sme_run;
3123
3124	ASSERT(sme->sme_type == SM_FREE);
3125
3126	/*
3127	 * Since the vdev_checkpoint_sm exists in the vdev level
3128	 * and the ms_sm space maps exist in the metaslab level,
3129	 * an entry in the checkpoint space map could theoretically
3130	 * cross the boundaries of the metaslab that it belongs.
3131	 *
3132	 * In reality, because of the way that we populate and
3133	 * manipulate the checkpoint's space maps currently,
3134	 * there shouldn't be any entries that cross metaslabs.
3135	 * Hence the assertion below.
3136	 *
3137	 * That said, there is no fundamental requirement that
3138	 * the checkpoint's space map entries should not cross
3139	 * metaslab boundaries. So if needed we could add code
3140	 * that handles metaslab-crossing segments in the future.
3141	 */
3142	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
3143	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
3144
3145	/*
3146	 * By removing the entry from the allocated segments we
3147	 * also verify that the entry is there to begin with.
3148	 */
3149	mutex_enter(&ms->ms_lock);
3150	range_tree_remove(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
3151	mutex_exit(&ms->ms_lock);
3152
3153	cseea->cseea_checkpoint_size += sme->sme_run;
3154	return (0);
3155}
3156
3157static void
3158zdb_leak_init_vdev_exclude_checkpoint(vdev_t *vd, zdb_cb_t *zcb)
3159{
3160	spa_t *spa = vd->vdev_spa;
3161	space_map_t *checkpoint_sm = NULL;
3162	uint64_t checkpoint_sm_obj;
3163
3164	/*
3165	 * If there is no vdev_top_zap, we are in a pool whose
3166	 * version predates the pool checkpoint feature.
3167	 */
3168	if (vd->vdev_top_zap == 0)
3169		return;
3170
3171	/*
3172	 * If there is no reference of the vdev_checkpoint_sm in
3173	 * the vdev_top_zap, then one of the following scenarios
3174	 * is true:
3175	 *
3176	 * 1] There is no checkpoint
3177	 * 2] There is a checkpoint, but no checkpointed blocks
3178	 *    have been freed yet
3179	 * 3] The current vdev is indirect
3180	 *
3181	 * In these cases we return immediately.
3182	 */
3183	if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
3184	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
3185		return;
3186
3187	VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
3188	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1,
3189	    &checkpoint_sm_obj));
3190
3191	checkpoint_sm_exclude_entry_arg_t cseea;
3192	cseea.cseea_vd = vd;
3193	cseea.cseea_checkpoint_size = 0;
3194
3195	VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
3196	    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
3197	space_map_update(checkpoint_sm);
3198
3199	VERIFY0(space_map_iterate(checkpoint_sm,
3200	    checkpoint_sm_exclude_entry_cb, &cseea));
3201	space_map_close(checkpoint_sm);
3202
3203	zcb->zcb_checkpoint_size += cseea.cseea_checkpoint_size;
3204}
3205
3206static void
3207zdb_leak_init_exclude_checkpoint(spa_t *spa, zdb_cb_t *zcb)
3208{
3209	vdev_t *rvd = spa->spa_root_vdev;
3210	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3211		ASSERT3U(c, ==, rvd->vdev_child[c]->vdev_id);
3212		zdb_leak_init_vdev_exclude_checkpoint(rvd->vdev_child[c], zcb);
3213	}
3214}
3215
3216static void
3217load_concrete_ms_allocatable_trees(spa_t *spa, maptype_t maptype)
3218{
3219	vdev_t *rvd = spa->spa_root_vdev;
3220	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
3221		vdev_t *vd = rvd->vdev_child[i];
3222
3223		ASSERT3U(i, ==, vd->vdev_id);
3224
3225		if (vd->vdev_ops == &vdev_indirect_ops)
3226			continue;
3227
3228		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3229			metaslab_t *msp = vd->vdev_ms[m];
3230
3231			(void) fprintf(stderr,
3232			    "\rloading concrete vdev %llu, "
3233			    "metaslab %llu of %llu ...",
3234			    (longlong_t)vd->vdev_id,
3235			    (longlong_t)msp->ms_id,
3236			    (longlong_t)vd->vdev_ms_count);
3237
3238			mutex_enter(&msp->ms_lock);
3239			metaslab_unload(msp);
3240
3241			/*
3242			 * We don't want to spend the CPU manipulating the
3243			 * size-ordered tree, so clear the range_tree ops.
3244			 */
3245			msp->ms_allocatable->rt_ops = NULL;
3246
3247			if (msp->ms_sm != NULL) {
3248				VERIFY0(space_map_load(msp->ms_sm,
3249				    msp->ms_allocatable, maptype));
3250			}
3251			if (!msp->ms_loaded)
3252				msp->ms_loaded = B_TRUE;
3253			mutex_exit(&msp->ms_lock);
3254		}
3255	}
3256}
3257
3258/*
3259 * vm_idxp is an in-out parameter which (for indirect vdevs) is the
3260 * index in vim_entries that has the first entry in this metaslab.
3261 * On return, it will be set to the first entry after this metaslab.
3262 */
3263static void
3264load_indirect_ms_allocatable_tree(vdev_t *vd, metaslab_t *msp,
3265    uint64_t *vim_idxp)
3266{
3267	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3268
3269	mutex_enter(&msp->ms_lock);
3270	metaslab_unload(msp);
3271
3272	/*
3273	 * We don't want to spend the CPU manipulating the
3274	 * size-ordered tree, so clear the range_tree ops.
3275	 */
3276	msp->ms_allocatable->rt_ops = NULL;
3277
3278	for (; *vim_idxp < vdev_indirect_mapping_num_entries(vim);
3279	    (*vim_idxp)++) {
3280		vdev_indirect_mapping_entry_phys_t *vimep =
3281		    &vim->vim_entries[*vim_idxp];
3282		uint64_t ent_offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3283		uint64_t ent_len = DVA_GET_ASIZE(&vimep->vimep_dst);
3284		ASSERT3U(ent_offset, >=, msp->ms_start);
3285		if (ent_offset >= msp->ms_start + msp->ms_size)
3286			break;
3287
3288		/*
3289		 * Mappings do not cross metaslab boundaries,
3290		 * because we create them by walking the metaslabs.
3291		 */
3292		ASSERT3U(ent_offset + ent_len, <=,
3293		    msp->ms_start + msp->ms_size);
3294		range_tree_add(msp->ms_allocatable, ent_offset, ent_len);
3295	}
3296
3297	if (!msp->ms_loaded)
3298		msp->ms_loaded = B_TRUE;
3299	mutex_exit(&msp->ms_lock);
3300}
3301
3302static void
3303zdb_leak_init_prepare_indirect_vdevs(spa_t *spa, zdb_cb_t *zcb)
3304{
3305	vdev_t *rvd = spa->spa_root_vdev;
3306	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3307		vdev_t *vd = rvd->vdev_child[c];
3308
3309		ASSERT3U(c, ==, vd->vdev_id);
3310
3311		if (vd->vdev_ops != &vdev_indirect_ops)
3312			continue;
3313
3314		/*
3315		 * Note: we don't check for mapping leaks on
3316		 * removing vdevs because their ms_allocatable's
3317		 * are used to look for leaks in allocated space.
3318		 */
3319		zcb->zcb_vd_obsolete_counts[c] = zdb_load_obsolete_counts(vd);
3320
3321		/*
3322		 * Normally, indirect vdevs don't have any
3323		 * metaslabs.  We want to set them up for
3324		 * zio_claim().
3325		 */
3326		VERIFY0(vdev_metaslab_init(vd, 0));
3327
3328		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3329		uint64_t vim_idx = 0;
3330		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3331
3332			(void) fprintf(stderr,
3333			    "\rloading indirect vdev %llu, "
3334			    "metaslab %llu of %llu ...",
3335			    (longlong_t)vd->vdev_id,
3336			    (longlong_t)vd->vdev_ms[m]->ms_id,
3337			    (longlong_t)vd->vdev_ms_count);
3338
3339			load_indirect_ms_allocatable_tree(vd, vd->vdev_ms[m],
3340			    &vim_idx);
3341		}
3342		ASSERT3U(vim_idx, ==, vdev_indirect_mapping_num_entries(vim));
3343	}
3344}
3345
3346static void
3347zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
3348{
3349	zcb->zcb_spa = spa;
3350
3351	if (!dump_opt['L']) {
3352		dsl_pool_t *dp = spa->spa_dsl_pool;
3353		vdev_t *rvd = spa->spa_root_vdev;
3354
3355		/*
3356		 * We are going to be changing the meaning of the metaslab's
3357		 * ms_allocatable.  Ensure that the allocator doesn't try to
3358		 * use the tree.
3359		 */
3360		spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
3361		spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
3362
3363		zcb->zcb_vd_obsolete_counts =
3364		    umem_zalloc(rvd->vdev_children * sizeof (uint32_t *),
3365		    UMEM_NOFAIL);
3366
3367		/*
3368		 * For leak detection, we overload the ms_allocatable trees
3369		 * to contain allocated segments instead of free segments.
3370		 * As a result, we can't use the normal metaslab_load/unload
3371		 * interfaces.
3372		 */
3373		zdb_leak_init_prepare_indirect_vdevs(spa, zcb);
3374		load_concrete_ms_allocatable_trees(spa, SM_ALLOC);
3375
3376		/*
3377		 * On load_concrete_ms_allocatable_trees() we loaded all the
3378		 * allocated entries from the ms_sm to the ms_allocatable for
3379		 * each metaslab. If the pool has a checkpoint or is in the
3380		 * middle of discarding a checkpoint, some of these blocks
3381		 * may have been freed but their ms_sm may not have been
3382		 * updated because they are referenced by the checkpoint. In
3383		 * order to avoid false-positives during leak-detection, we
3384		 * go through the vdev's checkpoint space map and exclude all
3385		 * its entries from their relevant ms_allocatable.
3386		 *
3387		 * We also aggregate the space held by the checkpoint and add
3388		 * it to zcb_checkpoint_size.
3389		 *
3390		 * Note that at this point we are also verifying that all the
3391		 * entries on the checkpoint_sm are marked as allocated in
3392		 * the ms_sm of their relevant metaslab.
3393		 * [see comment in checkpoint_sm_exclude_entry_cb()]
3394		 */
3395		zdb_leak_init_exclude_checkpoint(spa, zcb);
3396
3397		/* for cleaner progress output */
3398		(void) fprintf(stderr, "\n");
3399
3400		if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
3401			ASSERT(spa_feature_is_enabled(spa,
3402			    SPA_FEATURE_DEVICE_REMOVAL));
3403			(void) bpobj_iterate_nofree(&dp->dp_obsolete_bpobj,
3404			    increment_indirect_mapping_cb, zcb, NULL);
3405		}
3406	} else {
3407		/*
3408		 * If leak tracing is disabled, we still need to consider
3409		 * any checkpointed space in our space verification.
3410		 */
3411		zcb->zcb_checkpoint_size += spa_get_checkpoint_space(spa);
3412	}
3413
3414	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3415	zdb_ddt_leak_init(spa, zcb);
3416	spa_config_exit(spa, SCL_CONFIG, FTAG);
3417}
3418
3419static boolean_t
3420zdb_check_for_obsolete_leaks(vdev_t *vd, zdb_cb_t *zcb)
3421{
3422	boolean_t leaks = B_FALSE;
3423	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3424	uint64_t total_leaked = 0;
3425
3426	ASSERT(vim != NULL);
3427
3428	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
3429		vdev_indirect_mapping_entry_phys_t *vimep =
3430		    &vim->vim_entries[i];
3431		uint64_t obsolete_bytes = 0;
3432		uint64_t offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3433		metaslab_t *msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
3434
3435		/*
3436		 * This is not very efficient but it's easy to
3437		 * verify correctness.
3438		 */
3439		for (uint64_t inner_offset = 0;
3440		    inner_offset < DVA_GET_ASIZE(&vimep->vimep_dst);
3441		    inner_offset += 1 << vd->vdev_ashift) {
3442			if (range_tree_contains(msp->ms_allocatable,
3443			    offset + inner_offset, 1 << vd->vdev_ashift)) {
3444				obsolete_bytes += 1 << vd->vdev_ashift;
3445			}
3446		}
3447
3448		int64_t bytes_leaked = obsolete_bytes -
3449		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i];
3450		ASSERT3U(DVA_GET_ASIZE(&vimep->vimep_dst), >=,
3451		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i]);
3452		if (bytes_leaked != 0 &&
3453		    (vdev_obsolete_counts_are_precise(vd) ||
3454		    dump_opt['d'] >= 5)) {
3455			(void) printf("obsolete indirect mapping count "
3456			    "mismatch on %llu:%llx:%llx : %llx bytes leaked\n",
3457			    (u_longlong_t)vd->vdev_id,
3458			    (u_longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
3459			    (u_longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
3460			    (u_longlong_t)bytes_leaked);
3461		}
3462		total_leaked += ABS(bytes_leaked);
3463	}
3464
3465	if (!vdev_obsolete_counts_are_precise(vd) && total_leaked > 0) {
3466		int pct_leaked = total_leaked * 100 /
3467		    vdev_indirect_mapping_bytes_mapped(vim);
3468		(void) printf("cannot verify obsolete indirect mapping "
3469		    "counts of vdev %llu because precise feature was not "
3470		    "enabled when it was removed: %d%% (%llx bytes) of mapping"
3471		    "unreferenced\n",
3472		    (u_longlong_t)vd->vdev_id, pct_leaked,
3473		    (u_longlong_t)total_leaked);
3474	} else if (total_leaked > 0) {
3475		(void) printf("obsolete indirect mapping count mismatch "
3476		    "for vdev %llu -- %llx total bytes mismatched\n",
3477		    (u_longlong_t)vd->vdev_id,
3478		    (u_longlong_t)total_leaked);
3479		leaks |= B_TRUE;
3480	}
3481
3482	vdev_indirect_mapping_free_obsolete_counts(vim,
3483	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3484	zcb->zcb_vd_obsolete_counts[vd->vdev_id] = NULL;
3485
3486	return (leaks);
3487}
3488
3489static boolean_t
3490zdb_leak_fini(spa_t *spa, zdb_cb_t *zcb)
3491{
3492	boolean_t leaks = B_FALSE;
3493	if (!dump_opt['L']) {
3494		vdev_t *rvd = spa->spa_root_vdev;
3495		for (unsigned c = 0; c < rvd->vdev_children; c++) {
3496			vdev_t *vd = rvd->vdev_child[c];
3497			metaslab_group_t *mg = vd->vdev_mg;
3498
3499			if (zcb->zcb_vd_obsolete_counts[c] != NULL) {
3500				leaks |= zdb_check_for_obsolete_leaks(vd, zcb);
3501			}
3502
3503			for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3504				metaslab_t *msp = vd->vdev_ms[m];
3505				ASSERT3P(mg, ==, msp->ms_group);
3506
3507				/*
3508				 * ms_allocatable has been overloaded
3509				 * to contain allocated segments. Now that
3510				 * we finished traversing all blocks, any
3511				 * block that remains in the ms_allocatable
3512				 * represents an allocated block that we
3513				 * did not claim during the traversal.
3514				 * Claimed blocks would have been removed
3515				 * from the ms_allocatable.  For indirect
3516				 * vdevs, space remaining in the tree
3517				 * represents parts of the mapping that are
3518				 * not referenced, which is not a bug.
3519				 */
3520				if (vd->vdev_ops == &vdev_indirect_ops) {
3521					range_tree_vacate(msp->ms_allocatable,
3522					    NULL, NULL);
3523				} else {
3524					range_tree_vacate(msp->ms_allocatable,
3525					    zdb_leak, vd);
3526				}
3527
3528				if (msp->ms_loaded) {
3529					msp->ms_loaded = B_FALSE;
3530				}
3531			}
3532		}
3533
3534		umem_free(zcb->zcb_vd_obsolete_counts,
3535		    rvd->vdev_children * sizeof (uint32_t *));
3536		zcb->zcb_vd_obsolete_counts = NULL;
3537	}
3538	return (leaks);
3539}
3540
3541/* ARGSUSED */
3542static int
3543count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3544{
3545	zdb_cb_t *zcb = arg;
3546
3547	if (dump_opt['b'] >= 5) {
3548		char blkbuf[BP_SPRINTF_LEN];
3549		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3550		(void) printf("[%s] %s\n",
3551		    "deferred free", blkbuf);
3552	}
3553	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
3554	return (0);
3555}
3556
3557static int
3558dump_block_stats(spa_t *spa)
3559{
3560	zdb_cb_t zcb;
3561	zdb_blkstats_t *zb, *tzb;
3562	uint64_t norm_alloc, norm_space, total_alloc, total_found;
3563	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
3564	boolean_t leaks = B_FALSE;
3565
3566	bzero(&zcb, sizeof (zcb));
3567	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
3568	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
3569	    (dump_opt['c'] == 1) ? "metadata " : "",
3570	    dump_opt['c'] ? "checksums " : "",
3571	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
3572	    !dump_opt['L'] ? "nothing leaked " : "");
3573
3574	/*
3575	 * Load all space maps as SM_ALLOC maps, then traverse the pool
3576	 * claiming each block we discover.  If the pool is perfectly
3577	 * consistent, the space maps will be empty when we're done.
3578	 * Anything left over is a leak; any block we can't claim (because
3579	 * it's not part of any space map) is a double allocation,
3580	 * reference to a freed block, or an unclaimed log block.
3581	 */
3582	zdb_leak_init(spa, &zcb);
3583
3584	/*
3585	 * If there's a deferred-free bplist, process that first.
3586	 */
3587	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
3588	    count_block_cb, &zcb, NULL);
3589
3590	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
3591		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
3592		    count_block_cb, &zcb, NULL);
3593	}
3594
3595	zdb_claim_removing(spa, &zcb);
3596
3597	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
3598		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
3599		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
3600		    &zcb, NULL));
3601	}
3602
3603	if (dump_opt['c'] > 1)
3604		flags |= TRAVERSE_PREFETCH_DATA;
3605
3606	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
3607	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
3608	zcb.zcb_haderrors |= traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
3609
3610	/*
3611	 * If we've traversed the data blocks then we need to wait for those
3612	 * I/Os to complete. We leverage "The Godfather" zio to wait on
3613	 * all async I/Os to complete.
3614	 */
3615	if (dump_opt['c']) {
3616		for (int i = 0; i < max_ncpus; i++) {
3617			(void) zio_wait(spa->spa_async_zio_root[i]);
3618			spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
3619			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
3620			    ZIO_FLAG_GODFATHER);
3621		}
3622	}
3623
3624	if (zcb.zcb_haderrors) {
3625		(void) printf("\nError counts:\n\n");
3626		(void) printf("\t%5s  %s\n", "errno", "count");
3627		for (int e = 0; e < 256; e++) {
3628			if (zcb.zcb_errors[e] != 0) {
3629				(void) printf("\t%5d  %llu\n",
3630				    e, (u_longlong_t)zcb.zcb_errors[e]);
3631			}
3632		}
3633	}
3634
3635	/*
3636	 * Report any leaked segments.
3637	 */
3638	leaks |= zdb_leak_fini(spa, &zcb);
3639
3640	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
3641
3642	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
3643	norm_space = metaslab_class_get_space(spa_normal_class(spa));
3644
3645	total_alloc = norm_alloc + metaslab_class_get_alloc(spa_log_class(spa));
3646	total_found = tzb->zb_asize - zcb.zcb_dedup_asize +
3647	    zcb.zcb_removing_size + zcb.zcb_checkpoint_size;
3648
3649	if (total_found == total_alloc) {
3650		if (!dump_opt['L'])
3651			(void) printf("\n\tNo leaks (block sum matches space"
3652			    " maps exactly)\n");
3653	} else {
3654		(void) printf("block traversal size %llu != alloc %llu "
3655		    "(%s %lld)\n",
3656		    (u_longlong_t)total_found,
3657		    (u_longlong_t)total_alloc,
3658		    (dump_opt['L']) ? "unreachable" : "leaked",
3659		    (longlong_t)(total_alloc - total_found));
3660		leaks = B_TRUE;
3661	}
3662
3663	if (tzb->zb_count == 0)
3664		return (2);
3665
3666	(void) printf("\n");
3667	(void) printf("\tbp count:      %10llu\n",
3668	    (u_longlong_t)tzb->zb_count);
3669	(void) printf("\tganged count:  %10llu\n",
3670	    (longlong_t)tzb->zb_gangs);
3671	(void) printf("\tbp logical:    %10llu      avg: %6llu\n",
3672	    (u_longlong_t)tzb->zb_lsize,
3673	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
3674	(void) printf("\tbp physical:   %10llu      avg:"
3675	    " %6llu     compression: %6.2f\n",
3676	    (u_longlong_t)tzb->zb_psize,
3677	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
3678	    (double)tzb->zb_lsize / tzb->zb_psize);
3679	(void) printf("\tbp allocated:  %10llu      avg:"
3680	    " %6llu     compression: %6.2f\n",
3681	    (u_longlong_t)tzb->zb_asize,
3682	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
3683	    (double)tzb->zb_lsize / tzb->zb_asize);
3684	(void) printf("\tbp deduped:    %10llu    ref>1:"
3685	    " %6llu   deduplication: %6.2f\n",
3686	    (u_longlong_t)zcb.zcb_dedup_asize,
3687	    (u_longlong_t)zcb.zcb_dedup_blocks,
3688	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
3689	(void) printf("\tSPA allocated: %10llu     used: %5.2f%%\n",
3690	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
3691
3692	for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
3693		if (zcb.zcb_embedded_blocks[i] == 0)
3694			continue;
3695		(void) printf("\n");
3696		(void) printf("\tadditional, non-pointer bps of type %u: "
3697		    "%10llu\n",
3698		    i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
3699
3700		if (dump_opt['b'] >= 3) {
3701			(void) printf("\t number of (compressed) bytes:  "
3702			    "number of bps\n");
3703			dump_histogram(zcb.zcb_embedded_histogram[i],
3704			    sizeof (zcb.zcb_embedded_histogram[i]) /
3705			    sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
3706		}
3707	}
3708
3709	if (tzb->zb_ditto_samevdev != 0) {
3710		(void) printf("\tDittoed blocks on same vdev: %llu\n",
3711		    (longlong_t)tzb->zb_ditto_samevdev);
3712	}
3713
3714	for (uint64_t v = 0; v < spa->spa_root_vdev->vdev_children; v++) {
3715		vdev_t *vd = spa->spa_root_vdev->vdev_child[v];
3716		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3717
3718		if (vim == NULL) {
3719			continue;
3720		}
3721
3722		char mem[32];
3723		zdb_nicenum(vdev_indirect_mapping_num_entries(vim),
3724		    mem, vdev_indirect_mapping_size(vim));
3725
3726		(void) printf("\tindirect vdev id %llu has %llu segments "
3727		    "(%s in memory)\n",
3728		    (longlong_t)vd->vdev_id,
3729		    (longlong_t)vdev_indirect_mapping_num_entries(vim), mem);
3730	}
3731
3732	if (dump_opt['b'] >= 2) {
3733		int l, t, level;
3734		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
3735		    "\t  avg\t comp\t%%Total\tType\n");
3736
3737		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
3738			char csize[32], lsize[32], psize[32], asize[32];
3739			char avg[32], gang[32];
3740			const char *typename;
3741
3742			/* make sure nicenum has enough space */
3743			CTASSERT(sizeof (csize) >= NN_NUMBUF_SZ);
3744			CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
3745			CTASSERT(sizeof (psize) >= NN_NUMBUF_SZ);
3746			CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
3747			CTASSERT(sizeof (avg) >= NN_NUMBUF_SZ);
3748			CTASSERT(sizeof (gang) >= NN_NUMBUF_SZ);
3749
3750			if (t < DMU_OT_NUMTYPES)
3751				typename = dmu_ot[t].ot_name;
3752			else
3753				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
3754
3755			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
3756				(void) printf("%6s\t%5s\t%5s\t%5s"
3757				    "\t%5s\t%5s\t%6s\t%s\n",
3758				    "-",
3759				    "-",
3760				    "-",
3761				    "-",
3762				    "-",
3763				    "-",
3764				    "-",
3765				    typename);
3766				continue;
3767			}
3768
3769			for (l = ZB_TOTAL - 1; l >= -1; l--) {
3770				level = (l == -1 ? ZB_TOTAL : l);
3771				zb = &zcb.zcb_type[level][t];
3772
3773				if (zb->zb_asize == 0)
3774					continue;
3775
3776				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
3777					continue;
3778
3779				if (level == 0 && zb->zb_asize ==
3780				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
3781					continue;
3782
3783				zdb_nicenum(zb->zb_count, csize,
3784				    sizeof (csize));
3785				zdb_nicenum(zb->zb_lsize, lsize,
3786				    sizeof (lsize));
3787				zdb_nicenum(zb->zb_psize, psize,
3788				    sizeof (psize));
3789				zdb_nicenum(zb->zb_asize, asize,
3790				    sizeof (asize));
3791				zdb_nicenum(zb->zb_asize / zb->zb_count, avg,
3792				    sizeof (avg));
3793				zdb_nicenum(zb->zb_gangs, gang, sizeof (gang));
3794
3795				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
3796				    "\t%5.2f\t%6.2f\t",
3797				    csize, lsize, psize, asize, avg,
3798				    (double)zb->zb_lsize / zb->zb_psize,
3799				    100.0 * zb->zb_asize / tzb->zb_asize);
3800
3801				if (level == ZB_TOTAL)
3802					(void) printf("%s\n", typename);
3803				else
3804					(void) printf("    L%d %s\n",
3805					    level, typename);
3806
3807				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
3808					(void) printf("\t number of ganged "
3809					    "blocks: %s\n", gang);
3810				}
3811
3812				if (dump_opt['b'] >= 4) {
3813					(void) printf("psize "
3814					    "(in 512-byte sectors): "
3815					    "number of blocks\n");
3816					dump_histogram(zb->zb_psize_histogram,
3817					    PSIZE_HISTO_SIZE, 0);
3818				}
3819			}
3820		}
3821	}
3822
3823	(void) printf("\n");
3824
3825	if (leaks)
3826		return (2);
3827
3828	if (zcb.zcb_haderrors)
3829		return (3);
3830
3831	return (0);
3832}
3833
3834typedef struct zdb_ddt_entry {
3835	ddt_key_t	zdde_key;
3836	uint64_t	zdde_ref_blocks;
3837	uint64_t	zdde_ref_lsize;
3838	uint64_t	zdde_ref_psize;
3839	uint64_t	zdde_ref_dsize;
3840	avl_node_t	zdde_node;
3841} zdb_ddt_entry_t;
3842
3843/* ARGSUSED */
3844static int
3845zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
3846    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
3847{
3848	avl_tree_t *t = arg;
3849	avl_index_t where;
3850	zdb_ddt_entry_t *zdde, zdde_search;
3851
3852	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
3853		return (0);
3854
3855	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
3856		(void) printf("traversing objset %llu, %llu objects, "
3857		    "%lu blocks so far\n",
3858		    (u_longlong_t)zb->zb_objset,
3859		    (u_longlong_t)BP_GET_FILL(bp),
3860		    avl_numnodes(t));
3861	}
3862
3863	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
3864	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
3865		return (0);
3866
3867	ddt_key_fill(&zdde_search.zdde_key, bp);
3868
3869	zdde = avl_find(t, &zdde_search, &where);
3870
3871	if (zdde == NULL) {
3872		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
3873		zdde->zdde_key = zdde_search.zdde_key;
3874		avl_insert(t, zdde, where);
3875	}
3876
3877	zdde->zdde_ref_blocks += 1;
3878	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
3879	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
3880	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
3881
3882	return (0);
3883}
3884
3885static void
3886dump_simulated_ddt(spa_t *spa)
3887{
3888	avl_tree_t t;
3889	void *cookie = NULL;
3890	zdb_ddt_entry_t *zdde;
3891	ddt_histogram_t ddh_total;
3892	ddt_stat_t dds_total;
3893
3894	bzero(&ddh_total, sizeof (ddh_total));
3895	bzero(&dds_total, sizeof (dds_total));
3896	avl_create(&t, ddt_entry_compare,
3897	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
3898
3899	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3900
3901	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
3902	    zdb_ddt_add_cb, &t);
3903
3904	spa_config_exit(spa, SCL_CONFIG, FTAG);
3905
3906	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
3907		ddt_stat_t dds;
3908		uint64_t refcnt = zdde->zdde_ref_blocks;
3909		ASSERT(refcnt != 0);
3910
3911		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
3912		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
3913		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
3914		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
3915
3916		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
3917		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
3918		dds.dds_ref_psize = zdde->zdde_ref_psize;
3919		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
3920
3921		ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
3922		    &dds, 0);
3923
3924		umem_free(zdde, sizeof (*zdde));
3925	}
3926
3927	avl_destroy(&t);
3928
3929	ddt_histogram_stat(&dds_total, &ddh_total);
3930
3931	(void) printf("Simulated DDT histogram:\n");
3932
3933	zpool_dump_ddt(&dds_total, &ddh_total);
3934
3935	dump_dedup_ratio(&dds_total);
3936}
3937
3938static int
3939verify_device_removal_feature_counts(spa_t *spa)
3940{
3941	uint64_t dr_feature_refcount = 0;
3942	uint64_t oc_feature_refcount = 0;
3943	uint64_t indirect_vdev_count = 0;
3944	uint64_t precise_vdev_count = 0;
3945	uint64_t obsolete_counts_object_count = 0;
3946	uint64_t obsolete_sm_count = 0;
3947	uint64_t obsolete_counts_count = 0;
3948	uint64_t scip_count = 0;
3949	uint64_t obsolete_bpobj_count = 0;
3950	int ret = 0;
3951
3952	spa_condensing_indirect_phys_t *scip =
3953	    &spa->spa_condensing_indirect_phys;
3954	if (scip->scip_next_mapping_object != 0) {
3955		vdev_t *vd = spa->spa_root_vdev->vdev_child[scip->scip_vdev];
3956		ASSERT(scip->scip_prev_obsolete_sm_object != 0);
3957		ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops);
3958
3959		(void) printf("Condensing indirect vdev %llu: new mapping "
3960		    "object %llu, prev obsolete sm %llu\n",
3961		    (u_longlong_t)scip->scip_vdev,
3962		    (u_longlong_t)scip->scip_next_mapping_object,
3963		    (u_longlong_t)scip->scip_prev_obsolete_sm_object);
3964		if (scip->scip_prev_obsolete_sm_object != 0) {
3965			space_map_t *prev_obsolete_sm = NULL;
3966			VERIFY0(space_map_open(&prev_obsolete_sm,
3967			    spa->spa_meta_objset,
3968			    scip->scip_prev_obsolete_sm_object,
3969			    0, vd->vdev_asize, 0));
3970			space_map_update(prev_obsolete_sm);
3971			dump_spacemap(spa->spa_meta_objset, prev_obsolete_sm);
3972			(void) printf("\n");
3973			space_map_close(prev_obsolete_sm);
3974		}
3975
3976		scip_count += 2;
3977	}
3978
3979	for (uint64_t i = 0; i < spa->spa_root_vdev->vdev_children; i++) {
3980		vdev_t *vd = spa->spa_root_vdev->vdev_child[i];
3981		vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
3982
3983		if (vic->vic_mapping_object != 0) {
3984			ASSERT(vd->vdev_ops == &vdev_indirect_ops ||
3985			    vd->vdev_removing);
3986			indirect_vdev_count++;
3987
3988			if (vd->vdev_indirect_mapping->vim_havecounts) {
3989				obsolete_counts_count++;
3990			}
3991		}
3992		if (vdev_obsolete_counts_are_precise(vd)) {
3993			ASSERT(vic->vic_mapping_object != 0);
3994			precise_vdev_count++;
3995		}
3996		if (vdev_obsolete_sm_object(vd) != 0) {
3997			ASSERT(vic->vic_mapping_object != 0);
3998			obsolete_sm_count++;
3999		}
4000	}
4001
4002	(void) feature_get_refcount(spa,
4003	    &spa_feature_table[SPA_FEATURE_DEVICE_REMOVAL],
4004	    &dr_feature_refcount);
4005	(void) feature_get_refcount(spa,
4006	    &spa_feature_table[SPA_FEATURE_OBSOLETE_COUNTS],
4007	    &oc_feature_refcount);
4008
4009	if (dr_feature_refcount != indirect_vdev_count) {
4010		ret = 1;
4011		(void) printf("Number of indirect vdevs (%llu) " \
4012		    "does not match feature count (%llu)\n",
4013		    (u_longlong_t)indirect_vdev_count,
4014		    (u_longlong_t)dr_feature_refcount);
4015	} else {
4016		(void) printf("Verified device_removal feature refcount " \
4017		    "of %llu is correct\n",
4018		    (u_longlong_t)dr_feature_refcount);
4019	}
4020
4021	if (zap_contains(spa_meta_objset(spa), DMU_POOL_DIRECTORY_OBJECT,
4022	    DMU_POOL_OBSOLETE_BPOBJ) == 0) {
4023		obsolete_bpobj_count++;
4024	}
4025
4026
4027	obsolete_counts_object_count = precise_vdev_count;
4028	obsolete_counts_object_count += obsolete_sm_count;
4029	obsolete_counts_object_count += obsolete_counts_count;
4030	obsolete_counts_object_count += scip_count;
4031	obsolete_counts_object_count += obsolete_bpobj_count;
4032	obsolete_counts_object_count += remap_deadlist_count;
4033
4034	if (oc_feature_refcount != obsolete_counts_object_count) {
4035		ret = 1;
4036		(void) printf("Number of obsolete counts objects (%llu) " \
4037		    "does not match feature count (%llu)\n",
4038		    (u_longlong_t)obsolete_counts_object_count,
4039		    (u_longlong_t)oc_feature_refcount);
4040		(void) printf("pv:%llu os:%llu oc:%llu sc:%llu "
4041		    "ob:%llu rd:%llu\n",
4042		    (u_longlong_t)precise_vdev_count,
4043		    (u_longlong_t)obsolete_sm_count,
4044		    (u_longlong_t)obsolete_counts_count,
4045		    (u_longlong_t)scip_count,
4046		    (u_longlong_t)obsolete_bpobj_count,
4047		    (u_longlong_t)remap_deadlist_count);
4048	} else {
4049		(void) printf("Verified indirect_refcount feature refcount " \
4050		    "of %llu is correct\n",
4051		    (u_longlong_t)oc_feature_refcount);
4052	}
4053	return (ret);
4054}
4055
4056#define	BOGUS_SUFFIX "_CHECKPOINTED_UNIVERSE"
4057/*
4058 * Import the checkpointed state of the pool specified by the target
4059 * parameter as readonly. The function also accepts a pool config
4060 * as an optional parameter, else it attempts to infer the config by
4061 * the name of the target pool.
4062 *
4063 * Note that the checkpointed state's pool name will be the name of
4064 * the original pool with the above suffix appened to it. In addition,
4065 * if the target is not a pool name (e.g. a path to a dataset) then
4066 * the new_path parameter is populated with the updated path to
4067 * reflect the fact that we are looking into the checkpointed state.
4068 *
4069 * The function returns a newly-allocated copy of the name of the
4070 * pool containing the checkpointed state. When this copy is no
4071 * longer needed it should be freed with free(3C). Same thing
4072 * applies to the new_path parameter if allocated.
4073 */
4074static char *
4075import_checkpointed_state(char *target, nvlist_t *cfg, char **new_path)
4076{
4077	int error = 0;
4078	char *poolname, *bogus_name;
4079
4080	/* If the target is not a pool, the extract the pool name */
4081	char *path_start = strchr(target, '/');
4082	if (path_start != NULL) {
4083		size_t poolname_len = path_start - target;
4084		poolname = strndup(target, poolname_len);
4085	} else {
4086		poolname = target;
4087	}
4088
4089	if (cfg == NULL) {
4090		error = spa_get_stats(poolname, &cfg, NULL, 0);
4091		if (error != 0) {
4092			fatal("Tried to read config of pool \"%s\" but "
4093			    "spa_get_stats() failed with error %d\n",
4094			    poolname, error);
4095		}
4096	}
4097
4098	(void) asprintf(&bogus_name, "%s%s", poolname, BOGUS_SUFFIX);
4099	fnvlist_add_string(cfg, ZPOOL_CONFIG_POOL_NAME, bogus_name);
4100
4101	error = spa_import(bogus_name, cfg, NULL,
4102	    ZFS_IMPORT_MISSING_LOG | ZFS_IMPORT_CHECKPOINT);
4103	if (error != 0) {
4104		fatal("Tried to import pool \"%s\" but spa_import() failed "
4105		    "with error %d\n", bogus_name, error);
4106	}
4107
4108	if (new_path != NULL && path_start != NULL)
4109		(void) asprintf(new_path, "%s%s", bogus_name, path_start);
4110
4111	if (target != poolname)
4112		free(poolname);
4113
4114	return (bogus_name);
4115}
4116
4117typedef struct verify_checkpoint_sm_entry_cb_arg {
4118	vdev_t *vcsec_vd;
4119
4120	/* the following fields are only used for printing progress */
4121	uint64_t vcsec_entryid;
4122	uint64_t vcsec_num_entries;
4123} verify_checkpoint_sm_entry_cb_arg_t;
4124
4125#define	ENTRIES_PER_PROGRESS_UPDATE 10000
4126
4127static int
4128verify_checkpoint_sm_entry_cb(space_map_entry_t *sme, void *arg)
4129{
4130	verify_checkpoint_sm_entry_cb_arg_t *vcsec = arg;
4131	vdev_t *vd = vcsec->vcsec_vd;
4132	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
4133	uint64_t end = sme->sme_offset + sme->sme_run;
4134
4135	ASSERT(sme->sme_type == SM_FREE);
4136
4137	if ((vcsec->vcsec_entryid % ENTRIES_PER_PROGRESS_UPDATE) == 0) {
4138		(void) fprintf(stderr,
4139		    "\rverifying vdev %llu, space map entry %llu of %llu ...",
4140		    (longlong_t)vd->vdev_id,
4141		    (longlong_t)vcsec->vcsec_entryid,
4142		    (longlong_t)vcsec->vcsec_num_entries);
4143	}
4144	vcsec->vcsec_entryid++;
4145
4146	/*
4147	 * See comment in checkpoint_sm_exclude_entry_cb()
4148	 */
4149	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
4150	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
4151
4152	/*
4153	 * The entries in the vdev_checkpoint_sm should be marked as
4154	 * allocated in the checkpointed state of the pool, therefore
4155	 * their respective ms_allocateable trees should not contain them.
4156	 */
4157	mutex_enter(&ms->ms_lock);
4158	range_tree_verify(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
4159	mutex_exit(&ms->ms_lock);
4160
4161	return (0);
4162}
4163
4164/*
4165 * Verify that all segments in the vdev_checkpoint_sm are allocated
4166 * according to the checkpoint's ms_sm (i.e. are not in the checkpoint's
4167 * ms_allocatable).
4168 *
4169 * Do so by comparing the checkpoint space maps (vdev_checkpoint_sm) of
4170 * each vdev in the current state of the pool to the metaslab space maps
4171 * (ms_sm) of the checkpointed state of the pool.
4172 *
4173 * Note that the function changes the state of the ms_allocatable
4174 * trees of the current spa_t. The entries of these ms_allocatable
4175 * trees are cleared out and then repopulated from with the free
4176 * entries of their respective ms_sm space maps.
4177 */
4178static void
4179verify_checkpoint_vdev_spacemaps(spa_t *checkpoint, spa_t *current)
4180{
4181	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4182	vdev_t *current_rvd = current->spa_root_vdev;
4183
4184	load_concrete_ms_allocatable_trees(checkpoint, SM_FREE);
4185
4186	for (uint64_t c = 0; c < ckpoint_rvd->vdev_children; c++) {
4187		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[c];
4188		vdev_t *current_vd = current_rvd->vdev_child[c];
4189
4190		space_map_t *checkpoint_sm = NULL;
4191		uint64_t checkpoint_sm_obj;
4192
4193		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4194			/*
4195			 * Since we don't allow device removal in a pool
4196			 * that has a checkpoint, we expect that all removed
4197			 * vdevs were removed from the pool before the
4198			 * checkpoint.
4199			 */
4200			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4201			continue;
4202		}
4203
4204		/*
4205		 * If the checkpoint space map doesn't exist, then nothing
4206		 * here is checkpointed so there's nothing to verify.
4207		 */
4208		if (current_vd->vdev_top_zap == 0 ||
4209		    zap_contains(spa_meta_objset(current),
4210		    current_vd->vdev_top_zap,
4211		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4212			continue;
4213
4214		VERIFY0(zap_lookup(spa_meta_objset(current),
4215		    current_vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4216		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4217
4218		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(current),
4219		    checkpoint_sm_obj, 0, current_vd->vdev_asize,
4220		    current_vd->vdev_ashift));
4221		space_map_update(checkpoint_sm);
4222
4223		verify_checkpoint_sm_entry_cb_arg_t vcsec;
4224		vcsec.vcsec_vd = ckpoint_vd;
4225		vcsec.vcsec_entryid = 0;
4226		vcsec.vcsec_num_entries =
4227		    space_map_length(checkpoint_sm) / sizeof (uint64_t);
4228		VERIFY0(space_map_iterate(checkpoint_sm,
4229		    verify_checkpoint_sm_entry_cb, &vcsec));
4230		dump_spacemap(current->spa_meta_objset, checkpoint_sm);
4231		space_map_close(checkpoint_sm);
4232	}
4233
4234	/*
4235	 * If we've added vdevs since we took the checkpoint, ensure
4236	 * that their checkpoint space maps are empty.
4237	 */
4238	if (ckpoint_rvd->vdev_children < current_rvd->vdev_children) {
4239		for (uint64_t c = ckpoint_rvd->vdev_children;
4240		    c < current_rvd->vdev_children; c++) {
4241			vdev_t *current_vd = current_rvd->vdev_child[c];
4242			ASSERT3P(current_vd->vdev_checkpoint_sm, ==, NULL);
4243		}
4244	}
4245
4246	/* for cleaner progress output */
4247	(void) fprintf(stderr, "\n");
4248}
4249
4250/*
4251 * Verifies that all space that's allocated in the checkpoint is
4252 * still allocated in the current version, by checking that everything
4253 * in checkpoint's ms_allocatable (which is actually allocated, not
4254 * allocatable/free) is not present in current's ms_allocatable.
4255 *
4256 * Note that the function changes the state of the ms_allocatable
4257 * trees of both spas when called. The entries of all ms_allocatable
4258 * trees are cleared out and then repopulated from their respective
4259 * ms_sm space maps. In the checkpointed state we load the allocated
4260 * entries, and in the current state we load the free entries.
4261 */
4262static void
4263verify_checkpoint_ms_spacemaps(spa_t *checkpoint, spa_t *current)
4264{
4265	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4266	vdev_t *current_rvd = current->spa_root_vdev;
4267
4268	load_concrete_ms_allocatable_trees(checkpoint, SM_ALLOC);
4269	load_concrete_ms_allocatable_trees(current, SM_FREE);
4270
4271	for (uint64_t i = 0; i < ckpoint_rvd->vdev_children; i++) {
4272		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[i];
4273		vdev_t *current_vd = current_rvd->vdev_child[i];
4274
4275		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4276			/*
4277			 * See comment in verify_checkpoint_vdev_spacemaps()
4278			 */
4279			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4280			continue;
4281		}
4282
4283		for (uint64_t m = 0; m < ckpoint_vd->vdev_ms_count; m++) {
4284			metaslab_t *ckpoint_msp = ckpoint_vd->vdev_ms[m];
4285			metaslab_t *current_msp = current_vd->vdev_ms[m];
4286
4287			(void) fprintf(stderr,
4288			    "\rverifying vdev %llu of %llu, "
4289			    "metaslab %llu of %llu ...",
4290			    (longlong_t)current_vd->vdev_id,
4291			    (longlong_t)current_rvd->vdev_children,
4292			    (longlong_t)current_vd->vdev_ms[m]->ms_id,
4293			    (longlong_t)current_vd->vdev_ms_count);
4294
4295			/*
4296			 * We walk through the ms_allocatable trees that
4297			 * are loaded with the allocated blocks from the
4298			 * ms_sm spacemaps of the checkpoint. For each
4299			 * one of these ranges we ensure that none of them
4300			 * exists in the ms_allocatable trees of the
4301			 * current state which are loaded with the ranges
4302			 * that are currently free.
4303			 *
4304			 * This way we ensure that none of the blocks that
4305			 * are part of the checkpoint were freed by mistake.
4306			 */
4307			range_tree_walk(ckpoint_msp->ms_allocatable,
4308			    (range_tree_func_t *)range_tree_verify,
4309			    current_msp->ms_allocatable);
4310		}
4311	}
4312
4313	/* for cleaner progress output */
4314	(void) fprintf(stderr, "\n");
4315}
4316
4317static void
4318verify_checkpoint_blocks(spa_t *spa)
4319{
4320	spa_t *checkpoint_spa;
4321	char *checkpoint_pool;
4322	nvlist_t *config = NULL;
4323	int error = 0;
4324
4325	/*
4326	 * We import the checkpointed state of the pool (under a different
4327	 * name) so we can do verification on it against the current state
4328	 * of the pool.
4329	 */
4330	checkpoint_pool = import_checkpointed_state(spa->spa_name, config,
4331	    NULL);
4332	ASSERT(strcmp(spa->spa_name, checkpoint_pool) != 0);
4333
4334	error = spa_open(checkpoint_pool, &checkpoint_spa, FTAG);
4335	if (error != 0) {
4336		fatal("Tried to open pool \"%s\" but spa_open() failed with "
4337		    "error %d\n", checkpoint_pool, error);
4338	}
4339
4340	/*
4341	 * Ensure that ranges in the checkpoint space maps of each vdev
4342	 * are allocated according to the checkpointed state's metaslab
4343	 * space maps.
4344	 */
4345	verify_checkpoint_vdev_spacemaps(checkpoint_spa, spa);
4346
4347	/*
4348	 * Ensure that allocated ranges in the checkpoint's metaslab
4349	 * space maps remain allocated in the metaslab space maps of
4350	 * the current state.
4351	 */
4352	verify_checkpoint_ms_spacemaps(checkpoint_spa, spa);
4353
4354	/*
4355	 * Once we are done, we get rid of the checkpointed state.
4356	 */
4357	spa_close(checkpoint_spa, FTAG);
4358	free(checkpoint_pool);
4359}
4360
4361static void
4362dump_leftover_checkpoint_blocks(spa_t *spa)
4363{
4364	vdev_t *rvd = spa->spa_root_vdev;
4365
4366	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
4367		vdev_t *vd = rvd->vdev_child[i];
4368
4369		space_map_t *checkpoint_sm = NULL;
4370		uint64_t checkpoint_sm_obj;
4371
4372		if (vd->vdev_top_zap == 0)
4373			continue;
4374
4375		if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
4376		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4377			continue;
4378
4379		VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
4380		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4381		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4382
4383		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
4384		    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
4385		space_map_update(checkpoint_sm);
4386		dump_spacemap(spa->spa_meta_objset, checkpoint_sm);
4387		space_map_close(checkpoint_sm);
4388	}
4389}
4390
4391static int
4392verify_checkpoint(spa_t *spa)
4393{
4394	uberblock_t checkpoint;
4395	int error;
4396
4397	if (!spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT))
4398		return (0);
4399
4400	error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
4401	    DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t),
4402	    sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint);
4403
4404	if (error == ENOENT && !dump_opt['L']) {
4405		/*
4406		 * If the feature is active but the uberblock is missing
4407		 * then we must be in the middle of discarding the
4408		 * checkpoint.
4409		 */
4410		(void) printf("\nPartially discarded checkpoint "
4411		    "state found:\n");
4412		dump_leftover_checkpoint_blocks(spa);
4413		return (0);
4414	} else if (error != 0) {
4415		(void) printf("lookup error %d when looking for "
4416		    "checkpointed uberblock in MOS\n", error);
4417		return (error);
4418	}
4419	dump_uberblock(&checkpoint, "\nCheckpointed uberblock found:\n", "\n");
4420
4421	if (checkpoint.ub_checkpoint_txg == 0) {
4422		(void) printf("\nub_checkpoint_txg not set in checkpointed "
4423		    "uberblock\n");
4424		error = 3;
4425	}
4426
4427	if (error == 0 && !dump_opt['L'])
4428		verify_checkpoint_blocks(spa);
4429
4430	return (error);
4431}
4432
4433static void
4434dump_zpool(spa_t *spa)
4435{
4436	dsl_pool_t *dp = spa_get_dsl(spa);
4437	int rc = 0;
4438
4439	if (dump_opt['S']) {
4440		dump_simulated_ddt(spa);
4441		return;
4442	}
4443
4444	if (!dump_opt['e'] && dump_opt['C'] > 1) {
4445		(void) printf("\nCached configuration:\n");
4446		dump_nvlist(spa->spa_config, 8);
4447	}
4448
4449	if (dump_opt['C'])
4450		dump_config(spa);
4451
4452	if (dump_opt['u'])
4453		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
4454
4455	if (dump_opt['D'])
4456		dump_all_ddts(spa);
4457
4458	if (dump_opt['d'] > 2 || dump_opt['m'])
4459		dump_metaslabs(spa);
4460	if (dump_opt['M'])
4461		dump_metaslab_groups(spa);
4462
4463	if (dump_opt['d'] || dump_opt['i']) {
4464		dump_dir(dp->dp_meta_objset);
4465		if (dump_opt['d'] >= 3) {
4466			dsl_pool_t *dp = spa->spa_dsl_pool;
4467			dump_full_bpobj(&spa->spa_deferred_bpobj,
4468			    "Deferred frees", 0);
4469			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
4470				dump_full_bpobj(&dp->dp_free_bpobj,
4471				    "Pool snapshot frees", 0);
4472			}
4473			if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
4474				ASSERT(spa_feature_is_enabled(spa,
4475				    SPA_FEATURE_DEVICE_REMOVAL));
4476				dump_full_bpobj(&dp->dp_obsolete_bpobj,
4477				    "Pool obsolete blocks", 0);
4478			}
4479
4480			if (spa_feature_is_active(spa,
4481			    SPA_FEATURE_ASYNC_DESTROY)) {
4482				dump_bptree(spa->spa_meta_objset,
4483				    dp->dp_bptree_obj,
4484				    "Pool dataset frees");
4485			}
4486			dump_dtl(spa->spa_root_vdev, 0);
4487		}
4488		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
4489		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
4490
4491		for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
4492			uint64_t refcount;
4493
4494			if (!(spa_feature_table[f].fi_flags &
4495			    ZFEATURE_FLAG_PER_DATASET) ||
4496			    !spa_feature_is_enabled(spa, f)) {
4497				ASSERT0(dataset_feature_count[f]);
4498				continue;
4499			}
4500			(void) feature_get_refcount(spa,
4501			    &spa_feature_table[f], &refcount);
4502			if (dataset_feature_count[f] != refcount) {
4503				(void) printf("%s feature refcount mismatch: "
4504				    "%lld datasets != %lld refcount\n",
4505				    spa_feature_table[f].fi_uname,
4506				    (longlong_t)dataset_feature_count[f],
4507				    (longlong_t)refcount);
4508				rc = 2;
4509			} else {
4510				(void) printf("Verified %s feature refcount "
4511				    "of %llu is correct\n",
4512				    spa_feature_table[f].fi_uname,
4513				    (longlong_t)refcount);
4514			}
4515		}
4516
4517		if (rc == 0) {
4518			rc = verify_device_removal_feature_counts(spa);
4519		}
4520	}
4521	if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
4522		rc = dump_block_stats(spa);
4523
4524	if (rc == 0)
4525		rc = verify_spacemap_refcounts(spa);
4526
4527	if (dump_opt['s'])
4528		show_pool_stats(spa);
4529
4530	if (dump_opt['h'])
4531		dump_history(spa);
4532
4533	if (rc == 0)
4534		rc = verify_checkpoint(spa);
4535
4536	if (rc != 0) {
4537		dump_debug_buffer();
4538		exit(rc);
4539	}
4540}
4541
4542#define	ZDB_FLAG_CHECKSUM	0x0001
4543#define	ZDB_FLAG_DECOMPRESS	0x0002
4544#define	ZDB_FLAG_BSWAP		0x0004
4545#define	ZDB_FLAG_GBH		0x0008
4546#define	ZDB_FLAG_INDIRECT	0x0010
4547#define	ZDB_FLAG_PHYS		0x0020
4548#define	ZDB_FLAG_RAW		0x0040
4549#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
4550
4551static int flagbits[256];
4552
4553static void
4554zdb_print_blkptr(blkptr_t *bp, int flags)
4555{
4556	char blkbuf[BP_SPRINTF_LEN];
4557
4558	if (flags & ZDB_FLAG_BSWAP)
4559		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
4560
4561	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
4562	(void) printf("%s\n", blkbuf);
4563}
4564
4565static void
4566zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
4567{
4568	int i;
4569
4570	for (i = 0; i < nbps; i++)
4571		zdb_print_blkptr(&bp[i], flags);
4572}
4573
4574static void
4575zdb_dump_gbh(void *buf, int flags)
4576{
4577	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
4578}
4579
4580static void
4581zdb_dump_block_raw(void *buf, uint64_t size, int flags)
4582{
4583	if (flags & ZDB_FLAG_BSWAP)
4584		byteswap_uint64_array(buf, size);
4585	(void) write(1, buf, size);
4586}
4587
4588static void
4589zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
4590{
4591	uint64_t *d = (uint64_t *)buf;
4592	unsigned nwords = size / sizeof (uint64_t);
4593	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
4594	unsigned i, j;
4595	const char *hdr;
4596	char *c;
4597
4598
4599	if (do_bswap)
4600		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
4601	else
4602		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
4603
4604	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
4605
4606	for (i = 0; i < nwords; i += 2) {
4607		(void) printf("%06llx:  %016llx  %016llx  ",
4608		    (u_longlong_t)(i * sizeof (uint64_t)),
4609		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
4610		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
4611
4612		c = (char *)&d[i];
4613		for (j = 0; j < 2 * sizeof (uint64_t); j++)
4614			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
4615		(void) printf("\n");
4616	}
4617}
4618
4619/*
4620 * There are two acceptable formats:
4621 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
4622 *	child[.child]*    - For example: 0.1.1
4623 *
4624 * The second form can be used to specify arbitrary vdevs anywhere
4625 * in the heirarchy.  For example, in a pool with a mirror of
4626 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
4627 */
4628static vdev_t *
4629zdb_vdev_lookup(vdev_t *vdev, const char *path)
4630{
4631	char *s, *p, *q;
4632	unsigned i;
4633
4634	if (vdev == NULL)
4635		return (NULL);
4636
4637	/* First, assume the x.x.x.x format */
4638	i = strtoul(path, &s, 10);
4639	if (s == path || (s && *s != '.' && *s != '\0'))
4640		goto name;
4641	if (i >= vdev->vdev_children)
4642		return (NULL);
4643
4644	vdev = vdev->vdev_child[i];
4645	if (*s == '\0')
4646		return (vdev);
4647	return (zdb_vdev_lookup(vdev, s+1));
4648
4649name:
4650	for (i = 0; i < vdev->vdev_children; i++) {
4651		vdev_t *vc = vdev->vdev_child[i];
4652
4653		if (vc->vdev_path == NULL) {
4654			vc = zdb_vdev_lookup(vc, path);
4655			if (vc == NULL)
4656				continue;
4657			else
4658				return (vc);
4659		}
4660
4661		p = strrchr(vc->vdev_path, '/');
4662		p = p ? p + 1 : vc->vdev_path;
4663		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
4664
4665		if (strcmp(vc->vdev_path, path) == 0)
4666			return (vc);
4667		if (strcmp(p, path) == 0)
4668			return (vc);
4669		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
4670			return (vc);
4671	}
4672
4673	return (NULL);
4674}
4675
4676/* ARGSUSED */
4677static int
4678random_get_pseudo_bytes_cb(void *buf, size_t len, void *unused)
4679{
4680	return (random_get_pseudo_bytes(buf, len));
4681}
4682
4683/*
4684 * Read a block from a pool and print it out.  The syntax of the
4685 * block descriptor is:
4686 *
4687 *	pool:vdev_specifier:offset:size[:flags]
4688 *
4689 *	pool           - The name of the pool you wish to read from
4690 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
4691 *	offset         - offset, in hex, in bytes
4692 *	size           - Amount of data to read, in hex, in bytes
4693 *	flags          - A string of characters specifying options
4694 *		 b: Decode a blkptr at given offset within block
4695 *		*c: Calculate and display checksums
4696 *		 d: Decompress data before dumping
4697 *		 e: Byteswap data before dumping
4698 *		 g: Display data as a gang block header
4699 *		 i: Display as an indirect block
4700 *		 p: Do I/O to physical offset
4701 *		 r: Dump raw data to stdout
4702 *
4703 *              * = not yet implemented
4704 */
4705static void
4706zdb_read_block(char *thing, spa_t *spa)
4707{
4708	blkptr_t blk, *bp = &blk;
4709	dva_t *dva = bp->blk_dva;
4710	int flags = 0;
4711	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
4712	zio_t *zio;
4713	vdev_t *vd;
4714	abd_t *pabd;
4715	void *lbuf, *buf;
4716	const char *s, *vdev;
4717	char *p, *dup, *flagstr;
4718	int i, error;
4719
4720	dup = strdup(thing);
4721	s = strtok(dup, ":");
4722	vdev = s ? s : "";
4723	s = strtok(NULL, ":");
4724	offset = strtoull(s ? s : "", NULL, 16);
4725	s = strtok(NULL, ":");
4726	size = strtoull(s ? s : "", NULL, 16);
4727	s = strtok(NULL, ":");
4728	if (s)
4729		flagstr = strdup(s);
4730	else
4731		flagstr = strdup("");
4732
4733	s = NULL;
4734	if (size == 0)
4735		s = "size must not be zero";
4736	if (!IS_P2ALIGNED(size, DEV_BSIZE))
4737		s = "size must be a multiple of sector size";
4738	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
4739		s = "offset must be a multiple of sector size";
4740	if (s) {
4741		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
4742		free(dup);
4743		return;
4744	}
4745
4746	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
4747		for (i = 0; flagstr[i]; i++) {
4748			int bit = flagbits[(uchar_t)flagstr[i]];
4749
4750			if (bit == 0) {
4751				(void) printf("***Invalid flag: %c\n",
4752				    flagstr[i]);
4753				continue;
4754			}
4755			flags |= bit;
4756
4757			/* If it's not something with an argument, keep going */
4758			if ((bit & (ZDB_FLAG_CHECKSUM |
4759			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
4760				continue;
4761
4762			p = &flagstr[i + 1];
4763			if (bit == ZDB_FLAG_PRINT_BLKPTR)
4764				blkptr_offset = strtoull(p, &p, 16);
4765			if (*p != ':' && *p != '\0') {
4766				(void) printf("***Invalid flag arg: '%s'\n", s);
4767				free(dup);
4768				return;
4769			}
4770		}
4771	}
4772	free(flagstr);
4773
4774	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
4775	if (vd == NULL) {
4776		(void) printf("***Invalid vdev: %s\n", vdev);
4777		free(dup);
4778		return;
4779	} else {
4780		if (vd->vdev_path)
4781			(void) fprintf(stderr, "Found vdev: %s\n",
4782			    vd->vdev_path);
4783		else
4784			(void) fprintf(stderr, "Found vdev type: %s\n",
4785			    vd->vdev_ops->vdev_op_type);
4786	}
4787
4788	psize = size;
4789	lsize = size;
4790
4791	pabd = abd_alloc_linear(SPA_MAXBLOCKSIZE, B_FALSE);
4792	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
4793
4794	BP_ZERO(bp);
4795
4796	DVA_SET_VDEV(&dva[0], vd->vdev_id);
4797	DVA_SET_OFFSET(&dva[0], offset);
4798	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
4799	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
4800
4801	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
4802
4803	BP_SET_LSIZE(bp, lsize);
4804	BP_SET_PSIZE(bp, psize);
4805	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
4806	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
4807	BP_SET_TYPE(bp, DMU_OT_NONE);
4808	BP_SET_LEVEL(bp, 0);
4809	BP_SET_DEDUP(bp, 0);
4810	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
4811
4812	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
4813	zio = zio_root(spa, NULL, NULL, 0);
4814
4815	if (vd == vd->vdev_top) {
4816		/*
4817		 * Treat this as a normal block read.
4818		 */
4819		zio_nowait(zio_read(zio, spa, bp, pabd, psize, NULL, NULL,
4820		    ZIO_PRIORITY_SYNC_READ,
4821		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
4822	} else {
4823		/*
4824		 * Treat this as a vdev child I/O.
4825		 */
4826		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pabd,
4827		    psize, ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
4828		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
4829		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
4830		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | ZIO_FLAG_OPTIONAL,
4831		    NULL, NULL));
4832	}
4833
4834	error = zio_wait(zio);
4835	spa_config_exit(spa, SCL_STATE, FTAG);
4836
4837	if (error) {
4838		(void) printf("Read of %s failed, error: %d\n", thing, error);
4839		goto out;
4840	}
4841
4842	if (flags & ZDB_FLAG_DECOMPRESS) {
4843		/*
4844		 * We don't know how the data was compressed, so just try
4845		 * every decompress function at every inflated blocksize.
4846		 */
4847		enum zio_compress c;
4848		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
4849		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
4850
4851		abd_copy_to_buf(pbuf2, pabd, psize);
4852
4853		VERIFY0(abd_iterate_func(pabd, psize, SPA_MAXBLOCKSIZE - psize,
4854		    random_get_pseudo_bytes_cb, NULL));
4855
4856		VERIFY0(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
4857		    SPA_MAXBLOCKSIZE - psize));
4858
4859		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
4860		    lsize -= SPA_MINBLOCKSIZE) {
4861			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
4862				if (zio_decompress_data(c, pabd,
4863				    lbuf, psize, lsize) == 0 &&
4864				    zio_decompress_data_buf(c, pbuf2,
4865				    lbuf2, psize, lsize) == 0 &&
4866				    bcmp(lbuf, lbuf2, lsize) == 0)
4867					break;
4868			}
4869			if (c != ZIO_COMPRESS_FUNCTIONS)
4870				break;
4871			lsize -= SPA_MINBLOCKSIZE;
4872		}
4873
4874		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
4875		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
4876
4877		if (lsize <= psize) {
4878			(void) printf("Decompress of %s failed\n", thing);
4879			goto out;
4880		}
4881		buf = lbuf;
4882		size = lsize;
4883	} else {
4884		buf = abd_to_buf(pabd);
4885		size = psize;
4886	}
4887
4888	if (flags & ZDB_FLAG_PRINT_BLKPTR)
4889		zdb_print_blkptr((blkptr_t *)(void *)
4890		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
4891	else if (flags & ZDB_FLAG_RAW)
4892		zdb_dump_block_raw(buf, size, flags);
4893	else if (flags & ZDB_FLAG_INDIRECT)
4894		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
4895		    flags);
4896	else if (flags & ZDB_FLAG_GBH)
4897		zdb_dump_gbh(buf, flags);
4898	else
4899		zdb_dump_block(thing, buf, size, flags);
4900
4901out:
4902	abd_free(pabd);
4903	umem_free(lbuf, SPA_MAXBLOCKSIZE);
4904	free(dup);
4905}
4906
4907static void
4908zdb_embedded_block(char *thing)
4909{
4910	blkptr_t bp;
4911	unsigned long long *words = (void *)&bp;
4912	char buf[SPA_MAXBLOCKSIZE];
4913	int err;
4914
4915	bzero(&bp, sizeof (bp));
4916	err = sscanf(thing, "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx:"
4917	    "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx",
4918	    words + 0, words + 1, words + 2, words + 3,
4919	    words + 4, words + 5, words + 6, words + 7,
4920	    words + 8, words + 9, words + 10, words + 11,
4921	    words + 12, words + 13, words + 14, words + 15);
4922	if (err != 16) {
4923		(void) printf("invalid input format\n");
4924		exit(1);
4925	}
4926	ASSERT3U(BPE_GET_LSIZE(&bp), <=, SPA_MAXBLOCKSIZE);
4927	err = decode_embedded_bp(&bp, buf, BPE_GET_LSIZE(&bp));
4928	if (err != 0) {
4929		(void) printf("decode failed: %u\n", err);
4930		exit(1);
4931	}
4932	zdb_dump_block_raw(buf, BPE_GET_LSIZE(&bp), 0);
4933}
4934
4935static boolean_t
4936pool_match(nvlist_t *cfg, char *tgt)
4937{
4938	uint64_t v, guid = strtoull(tgt, NULL, 0);
4939	char *s;
4940
4941	if (guid != 0) {
4942		if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0)
4943			return (v == guid);
4944	} else {
4945		if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0)
4946			return (strcmp(s, tgt) == 0);
4947	}
4948	return (B_FALSE);
4949}
4950
4951static char *
4952find_zpool(char **target, nvlist_t **configp, int dirc, char **dirv)
4953{
4954	nvlist_t *pools;
4955	nvlist_t *match = NULL;
4956	char *name = NULL;
4957	char *sepp = NULL;
4958	char sep = '\0';
4959	int count = 0;
4960	importargs_t args;
4961
4962	bzero(&args, sizeof (args));
4963	args.paths = dirc;
4964	args.path = dirv;
4965	args.can_be_active = B_TRUE;
4966
4967	if ((sepp = strpbrk(*target, "/@")) != NULL) {
4968		sep = *sepp;
4969		*sepp = '\0';
4970	}
4971
4972	pools = zpool_search_import(g_zfs, &args);
4973
4974	if (pools != NULL) {
4975		nvpair_t *elem = NULL;
4976		while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) {
4977			verify(nvpair_value_nvlist(elem, configp) == 0);
4978			if (pool_match(*configp, *target)) {
4979				count++;
4980				if (match != NULL) {
4981					/* print previously found config */
4982					if (name != NULL) {
4983						(void) printf("%s\n", name);
4984						dump_nvlist(match, 8);
4985						name = NULL;
4986					}
4987					(void) printf("%s\n",
4988					    nvpair_name(elem));
4989					dump_nvlist(*configp, 8);
4990				} else {
4991					match = *configp;
4992					name = nvpair_name(elem);
4993				}
4994			}
4995		}
4996	}
4997	if (count > 1)
4998		(void) fatal("\tMatched %d pools - use pool GUID "
4999		    "instead of pool name or \n"
5000		    "\tpool name part of a dataset name to select pool", count);
5001
5002	if (sepp)
5003		*sepp = sep;
5004	/*
5005	 * If pool GUID was specified for pool id, replace it with pool name
5006	 */
5007	if (name && (strstr(*target, name) != *target)) {
5008		int sz = 1 + strlen(name) + ((sepp) ? strlen(sepp) : 0);
5009
5010		*target = umem_alloc(sz, UMEM_NOFAIL);
5011		(void) snprintf(*target, sz, "%s%s", name, sepp ? sepp : "");
5012	}
5013
5014	*configp = name ? match : NULL;
5015
5016	return (name);
5017}
5018
5019int
5020main(int argc, char **argv)
5021{
5022	int c;
5023	struct rlimit rl = { 1024, 1024 };
5024	spa_t *spa = NULL;
5025	objset_t *os = NULL;
5026	int dump_all = 1;
5027	int verbose = 0;
5028	int error = 0;
5029	char **searchdirs = NULL;
5030	int nsearch = 0;
5031	char *target;
5032	nvlist_t *policy = NULL;
5033	uint64_t max_txg = UINT64_MAX;
5034	int flags = ZFS_IMPORT_MISSING_LOG;
5035	int rewind = ZPOOL_NEVER_REWIND;
5036	char *spa_config_path_env;
5037	boolean_t target_is_spa = B_TRUE;
5038	nvlist_t *cfg = NULL;
5039
5040	(void) setrlimit(RLIMIT_NOFILE, &rl);
5041	(void) enable_extended_FILE_stdio(-1, -1);
5042
5043	dprintf_setup(&argc, argv);
5044
5045	/*
5046	 * If there is an environment variable SPA_CONFIG_PATH it overrides
5047	 * default spa_config_path setting. If -U flag is specified it will
5048	 * override this environment variable settings once again.
5049	 */
5050	spa_config_path_env = getenv("SPA_CONFIG_PATH");
5051	if (spa_config_path_env != NULL)
5052		spa_config_path = spa_config_path_env;
5053
5054	while ((c = getopt(argc, argv,
5055	    "AbcCdDeEFGhiI:klLmMo:Op:PqRsSt:uU:vVx:X")) != -1) {
5056		switch (c) {
5057		case 'b':
5058		case 'c':
5059		case 'C':
5060		case 'd':
5061		case 'D':
5062		case 'E':
5063		case 'G':
5064		case 'h':
5065		case 'i':
5066		case 'l':
5067		case 'm':
5068		case 'M':
5069		case 'O':
5070		case 'R':
5071		case 's':
5072		case 'S':
5073		case 'u':
5074			dump_opt[c]++;
5075			dump_all = 0;
5076			break;
5077		case 'A':
5078		case 'e':
5079		case 'F':
5080		case 'k':
5081		case 'L':
5082		case 'P':
5083		case 'q':
5084		case 'X':
5085			dump_opt[c]++;
5086			break;
5087		/* NB: Sort single match options below. */
5088		case 'I':
5089			max_inflight = strtoull(optarg, NULL, 0);
5090			if (max_inflight == 0) {
5091				(void) fprintf(stderr, "maximum number "
5092				    "of inflight I/Os must be greater "
5093				    "than 0\n");
5094				usage();
5095			}
5096			break;
5097		case 'o':
5098			error = set_global_var(optarg);
5099			if (error != 0)
5100				usage();
5101			break;
5102		case 'p':
5103			if (searchdirs == NULL) {
5104				searchdirs = umem_alloc(sizeof (char *),
5105				    UMEM_NOFAIL);
5106			} else {
5107				char **tmp = umem_alloc((nsearch + 1) *
5108				    sizeof (char *), UMEM_NOFAIL);
5109				bcopy(searchdirs, tmp, nsearch *
5110				    sizeof (char *));
5111				umem_free(searchdirs,
5112				    nsearch * sizeof (char *));
5113				searchdirs = tmp;
5114			}
5115			searchdirs[nsearch++] = optarg;
5116			break;
5117		case 't':
5118			max_txg = strtoull(optarg, NULL, 0);
5119			if (max_txg < TXG_INITIAL) {
5120				(void) fprintf(stderr, "incorrect txg "
5121				    "specified: %s\n", optarg);
5122				usage();
5123			}
5124			break;
5125		case 'U':
5126			spa_config_path = optarg;
5127			if (spa_config_path[0] != '/') {
5128				(void) fprintf(stderr,
5129				    "cachefile must be an absolute path "
5130				    "(i.e. start with a slash)\n");
5131				usage();
5132			}
5133			break;
5134		case 'v':
5135			verbose++;
5136			break;
5137		case 'V':
5138			flags = ZFS_IMPORT_VERBATIM;
5139			break;
5140		case 'x':
5141			vn_dumpdir = optarg;
5142			break;
5143		default:
5144			usage();
5145			break;
5146		}
5147	}
5148
5149	if (!dump_opt['e'] && searchdirs != NULL) {
5150		(void) fprintf(stderr, "-p option requires use of -e\n");
5151		usage();
5152	}
5153
5154	/*
5155	 * ZDB does not typically re-read blocks; therefore limit the ARC
5156	 * to 256 MB, which can be used entirely for metadata.
5157	 */
5158	zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
5159
5160	/*
5161	 * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
5162	 * "zdb -b" uses traversal prefetch which uses async reads.
5163	 * For good performance, let several of them be active at once.
5164	 */
5165	zfs_vdev_async_read_max_active = 10;
5166
5167	/*
5168	 * Disable reference tracking for better performance.
5169	 */
5170	reference_tracking_enable = B_FALSE;
5171
5172	/*
5173	 * Do not fail spa_load when spa_load_verify fails. This is needed
5174	 * to load non-idle pools.
5175	 */
5176	spa_load_verify_dryrun = B_TRUE;
5177
5178	kernel_init(FREAD);
5179	g_zfs = libzfs_init();
5180	ASSERT(g_zfs != NULL);
5181
5182	if (dump_all)
5183		verbose = MAX(verbose, 1);
5184
5185	for (c = 0; c < 256; c++) {
5186		if (dump_all && strchr("AeEFklLOPRSX", c) == NULL)
5187			dump_opt[c] = 1;
5188		if (dump_opt[c])
5189			dump_opt[c] += verbose;
5190	}
5191
5192	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
5193	zfs_recover = (dump_opt['A'] > 1);
5194
5195	argc -= optind;
5196	argv += optind;
5197
5198	if (argc < 2 && dump_opt['R'])
5199		usage();
5200
5201	if (dump_opt['E']) {
5202		if (argc != 1)
5203			usage();
5204		zdb_embedded_block(argv[0]);
5205		return (0);
5206	}
5207
5208	if (argc < 1) {
5209		if (!dump_opt['e'] && dump_opt['C']) {
5210			dump_cachefile(spa_config_path);
5211			return (0);
5212		}
5213		usage();
5214	}
5215
5216	if (dump_opt['l'])
5217		return (dump_label(argv[0]));
5218
5219	if (dump_opt['O']) {
5220		if (argc != 2)
5221			usage();
5222		dump_opt['v'] = verbose + 3;
5223		return (dump_path(argv[0], argv[1]));
5224	}
5225
5226	if (dump_opt['X'] || dump_opt['F'])
5227		rewind = ZPOOL_DO_REWIND |
5228		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
5229
5230	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
5231	    nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, max_txg) != 0 ||
5232	    nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY, rewind) != 0)
5233		fatal("internal error: %s", strerror(ENOMEM));
5234
5235	error = 0;
5236	target = argv[0];
5237
5238	if (dump_opt['e']) {
5239		char *name = find_zpool(&target, &cfg, nsearch, searchdirs);
5240
5241		error = ENOENT;
5242		if (name) {
5243			if (dump_opt['C'] > 1) {
5244				(void) printf("\nConfiguration for import:\n");
5245				dump_nvlist(cfg, 8);
5246			}
5247
5248			if (nvlist_add_nvlist(cfg,
5249			    ZPOOL_LOAD_POLICY, policy) != 0) {
5250				fatal("can't open '%s': %s",
5251				    target, strerror(ENOMEM));
5252			}
5253			error = spa_import(name, cfg, NULL, flags);
5254		}
5255	}
5256
5257	char *checkpoint_pool = NULL;
5258	char *checkpoint_target = NULL;
5259	if (dump_opt['k']) {
5260		checkpoint_pool = import_checkpointed_state(target, cfg,
5261		    &checkpoint_target);
5262
5263		if (checkpoint_target != NULL)
5264			target = checkpoint_target;
5265
5266	}
5267
5268	if (strpbrk(target, "/@") != NULL) {
5269		size_t targetlen;
5270
5271		target_is_spa = B_FALSE;
5272		/*
5273		 * Remove any trailing slash.  Later code would get confused
5274		 * by it, but we want to allow it so that "pool/" can
5275		 * indicate that we want to dump the topmost filesystem,
5276		 * rather than the whole pool.
5277		 */
5278		targetlen = strlen(target);
5279		if (targetlen != 0 && target[targetlen - 1] == '/')
5280			target[targetlen - 1] = '\0';
5281	}
5282
5283	if (error == 0) {
5284		if (dump_opt['k'] && (target_is_spa || dump_opt['R'])) {
5285			ASSERT(checkpoint_pool != NULL);
5286			ASSERT(checkpoint_target == NULL);
5287
5288			error = spa_open(checkpoint_pool, &spa, FTAG);
5289			if (error != 0) {
5290				fatal("Tried to open pool \"%s\" but "
5291				    "spa_open() failed with error %d\n",
5292				    checkpoint_pool, error);
5293			}
5294
5295		} else if (target_is_spa || dump_opt['R']) {
5296			error = spa_open_rewind(target, &spa, FTAG, policy,
5297			    NULL);
5298			if (error) {
5299				/*
5300				 * If we're missing the log device then
5301				 * try opening the pool after clearing the
5302				 * log state.
5303				 */
5304				mutex_enter(&spa_namespace_lock);
5305				if ((spa = spa_lookup(target)) != NULL &&
5306				    spa->spa_log_state == SPA_LOG_MISSING) {
5307					spa->spa_log_state = SPA_LOG_CLEAR;
5308					error = 0;
5309				}
5310				mutex_exit(&spa_namespace_lock);
5311
5312				if (!error) {
5313					error = spa_open_rewind(target, &spa,
5314					    FTAG, policy, NULL);
5315				}
5316			}
5317		} else {
5318			error = open_objset(target, DMU_OST_ANY, FTAG, &os);
5319		}
5320	}
5321	nvlist_free(policy);
5322
5323	if (error)
5324		fatal("can't open '%s': %s", target, strerror(error));
5325
5326	argv++;
5327	argc--;
5328	if (!dump_opt['R']) {
5329		if (argc > 0) {
5330			zopt_objects = argc;
5331			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
5332			for (unsigned i = 0; i < zopt_objects; i++) {
5333				errno = 0;
5334				zopt_object[i] = strtoull(argv[i], NULL, 0);
5335				if (zopt_object[i] == 0 && errno != 0)
5336					fatal("bad number %s: %s",
5337					    argv[i], strerror(errno));
5338			}
5339		}
5340		if (os != NULL) {
5341			dump_dir(os);
5342		} else if (zopt_objects > 0 && !dump_opt['m']) {
5343			dump_dir(spa->spa_meta_objset);
5344		} else {
5345			dump_zpool(spa);
5346		}
5347	} else {
5348		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
5349		flagbits['c'] = ZDB_FLAG_CHECKSUM;
5350		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
5351		flagbits['e'] = ZDB_FLAG_BSWAP;
5352		flagbits['g'] = ZDB_FLAG_GBH;
5353		flagbits['i'] = ZDB_FLAG_INDIRECT;
5354		flagbits['p'] = ZDB_FLAG_PHYS;
5355		flagbits['r'] = ZDB_FLAG_RAW;
5356
5357		for (int i = 0; i < argc; i++)
5358			zdb_read_block(argv[i], spa);
5359	}
5360
5361	if (dump_opt['k']) {
5362		free(checkpoint_pool);
5363		if (!target_is_spa)
5364			free(checkpoint_target);
5365	}
5366
5367	if (os != NULL)
5368		close_objset(os, FTAG);
5369	else
5370		spa_close(spa, FTAG);
5371
5372	fuid_table_destroy();
5373
5374	dump_debug_buffer();
5375
5376	libzfs_fini(g_zfs);
5377	kernel_fini();
5378
5379	return (error);
5380}
5381