zdb.c revision a3874b8b1fe5103fc1f961609557c0587435fec0
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, 2018 by Delphix. All rights reserved.
25 * Copyright (c) 2014 Integros [integros.com]
26 * Copyright 2017 Nexenta Systems, Inc.
27 * Copyright (c) 2017, 2018 Lawrence Livermore National Security, LLC.
28 * Copyright 2017 RackTop Systems.
29 */
30
31#include <stdio.h>
32#include <unistd.h>
33#include <stdio_ext.h>
34#include <stdlib.h>
35#include <ctype.h>
36#include <sys/zfs_context.h>
37#include <sys/spa.h>
38#include <sys/spa_impl.h>
39#include <sys/dmu.h>
40#include <sys/zap.h>
41#include <sys/fs/zfs.h>
42#include <sys/zfs_znode.h>
43#include <sys/zfs_sa.h>
44#include <sys/sa.h>
45#include <sys/sa_impl.h>
46#include <sys/vdev.h>
47#include <sys/vdev_impl.h>
48#include <sys/metaslab_impl.h>
49#include <sys/dmu_objset.h>
50#include <sys/dsl_dir.h>
51#include <sys/dsl_dataset.h>
52#include <sys/dsl_pool.h>
53#include <sys/dbuf.h>
54#include <sys/zil.h>
55#include <sys/zil_impl.h>
56#include <sys/stat.h>
57#include <sys/resource.h>
58#include <sys/dmu_traverse.h>
59#include <sys/zio_checksum.h>
60#include <sys/zio_compress.h>
61#include <sys/zfs_fuid.h>
62#include <sys/arc.h>
63#include <sys/ddt.h>
64#include <sys/zfeature.h>
65#include <sys/abd.h>
66#include <sys/blkptr.h>
67#include <sys/dsl_scan.h>
68#include <zfs_comutil.h>
69#include <libcmdutils.h>
70#undef verify
71#include <libzfs.h>
72
73#include "zdb.h"
74
75#define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
76	zio_compress_table[(idx)].ci_name : "UNKNOWN")
77#define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
78	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
79#define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
80	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
81	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
82#define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
83	(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ?	\
84	DMU_OT_ZAP_OTHER : \
85	(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
86	DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
87
88#ifndef lint
89extern int reference_tracking_enable;
90extern boolean_t zfs_recover;
91extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
92extern int zfs_vdev_async_read_max_active;
93extern int aok;
94extern boolean_t spa_load_verify_dryrun;
95#else
96int reference_tracking_enable;
97boolean_t zfs_recover;
98uint64_t zfs_arc_max, zfs_arc_meta_limit;
99int zfs_vdev_async_read_max_active;
100int aok;
101boolean_t spa_load_verify_dryrun;
102#endif
103
104static const char cmdname[] = "zdb";
105uint8_t dump_opt[256];
106
107typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
108
109uint64_t *zopt_object = NULL;
110static unsigned zopt_objects = 0;
111libzfs_handle_t *g_zfs;
112uint64_t max_inflight = 1000;
113static int leaked_objects = 0;
114
115static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
116static void mos_obj_refd(uint64_t);
117
118/*
119 * These libumem hooks provide a reasonable set of defaults for the allocator's
120 * debugging facilities.
121 */
122const char *
123_umem_debug_init()
124{
125	return ("default,verbose"); /* $UMEM_DEBUG setting */
126}
127
128const char *
129_umem_logging_init(void)
130{
131	return ("fail,contents"); /* $UMEM_LOGGING setting */
132}
133
134static void
135usage(void)
136{
137	(void) fprintf(stderr,
138	    "Usage:\t%s [-AbcdDFGhikLMPsvX] [-e [-V] [-p <path> ...]] "
139	    "[-I <inflight I/Os>]\n"
140	    "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
141	    "\t\t[<poolname> [<object> ...]]\n"
142	    "\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset> "
143	    "[<object> ...]\n"
144	    "\t%s -C [-A] [-U <cache>]\n"
145	    "\t%s -l [-Aqu] <device>\n"
146	    "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
147	    "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
148	    "\t%s -O <dataset> <path>\n"
149	    "\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
150	    "\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
151	    "\t%s -E [-A] word0:word1:...:word15\n"
152	    "\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
153	    "<poolname>\n\n",
154	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
155	    cmdname, cmdname);
156
157	(void) fprintf(stderr, "    Dataset name must include at least one "
158	    "separator character '/' or '@'\n");
159	(void) fprintf(stderr, "    If dataset name is specified, only that "
160	    "dataset is dumped\n");
161	(void) fprintf(stderr, "    If object numbers are specified, only "
162	    "those objects are dumped\n\n");
163	(void) fprintf(stderr, "    Options to control amount of output:\n");
164	(void) fprintf(stderr, "        -b block statistics\n");
165	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
166	    "all data) blocks\n");
167	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
168	(void) fprintf(stderr, "        -d dataset(s)\n");
169	(void) fprintf(stderr, "        -D dedup statistics\n");
170	(void) fprintf(stderr, "        -E decode and display block from an "
171	    "embedded block pointer\n");
172	(void) fprintf(stderr, "        -h pool history\n");
173	(void) fprintf(stderr, "        -i intent logs\n");
174	(void) fprintf(stderr, "        -l read label contents\n");
175	(void) fprintf(stderr, "        -k examine the checkpointed state "
176	    "of the pool\n");
177	(void) fprintf(stderr, "        -L disable leak tracking (do not "
178	    "load spacemaps)\n");
179	(void) fprintf(stderr, "        -m metaslabs\n");
180	(void) fprintf(stderr, "        -M metaslab groups\n");
181	(void) fprintf(stderr, "        -O perform object lookups by path\n");
182	(void) fprintf(stderr, "        -R read and display block from a "
183	    "device\n");
184	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
185	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
186	(void) fprintf(stderr, "        -v verbose (applies to all "
187	    "others)\n\n");
188	(void) fprintf(stderr, "    Below options are intended for use "
189	    "with other options:\n");
190	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
191	    "panic recovery (-AA) or both (-AAA)\n");
192	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
193	    "has altroot/not in a cachefile\n");
194	(void) fprintf(stderr, "        -F attempt automatic rewind within "
195	    "safe range of transaction groups\n");
196	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
197	    "exiting\n");
198	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
199	    "specify the maximum number of "
200	    "checksumming I/Os [default is 200]\n");
201	(void) fprintf(stderr, "        -o <variable>=<value> set global "
202	    "variable to an unsigned 32-bit integer value\n");
203	(void) fprintf(stderr, "        -p <path> -- use one or more with "
204	    "-e to specify path to vdev dir\n");
205	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
206	(void) fprintf(stderr, "        -q don't print label contents\n");
207	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
208	    "searching for uberblocks\n");
209	(void) fprintf(stderr, "        -u uberblock\n");
210	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
211	    "cachefile\n");
212	(void) fprintf(stderr, "        -V do verbatim import\n");
213	(void) fprintf(stderr, "        -x <dumpdir> -- "
214	    "dump all read blocks into specified directory\n");
215	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
216	    "work with dataset)\n\n");
217	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
218	    "to make only that option verbose\n");
219	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
220	exit(1);
221}
222
223static void
224dump_debug_buffer()
225{
226	if (dump_opt['G']) {
227		(void) printf("\n");
228		zfs_dbgmsg_print("zdb");
229	}
230}
231
232/*
233 * Called for usage errors that are discovered after a call to spa_open(),
234 * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
235 */
236
237static void
238fatal(const char *fmt, ...)
239{
240	va_list ap;
241
242	va_start(ap, fmt);
243	(void) fprintf(stderr, "%s: ", cmdname);
244	(void) vfprintf(stderr, fmt, ap);
245	va_end(ap);
246	(void) fprintf(stderr, "\n");
247
248	dump_debug_buffer();
249
250	exit(1);
251}
252
253/* ARGSUSED */
254static void
255dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
256{
257	nvlist_t *nv;
258	size_t nvsize = *(uint64_t *)data;
259	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
260
261	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
262
263	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
264
265	umem_free(packed, nvsize);
266
267	dump_nvlist(nv, 8);
268
269	nvlist_free(nv);
270}
271
272/* ARGSUSED */
273static void
274dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
275{
276	spa_history_phys_t *shp = data;
277
278	if (shp == NULL)
279		return;
280
281	(void) printf("\t\tpool_create_len = %llu\n",
282	    (u_longlong_t)shp->sh_pool_create_len);
283	(void) printf("\t\tphys_max_off = %llu\n",
284	    (u_longlong_t)shp->sh_phys_max_off);
285	(void) printf("\t\tbof = %llu\n",
286	    (u_longlong_t)shp->sh_bof);
287	(void) printf("\t\teof = %llu\n",
288	    (u_longlong_t)shp->sh_eof);
289	(void) printf("\t\trecords_lost = %llu\n",
290	    (u_longlong_t)shp->sh_records_lost);
291}
292
293static void
294zdb_nicenum(uint64_t num, char *buf, size_t buflen)
295{
296	if (dump_opt['P'])
297		(void) snprintf(buf, buflen, "%llu", (longlong_t)num);
298	else
299		nicenum(num, buf, sizeof (buf));
300}
301
302static const char histo_stars[] = "****************************************";
303static const uint64_t histo_width = sizeof (histo_stars) - 1;
304
305static void
306dump_histogram(const uint64_t *histo, int size, int offset)
307{
308	int i;
309	int minidx = size - 1;
310	int maxidx = 0;
311	uint64_t max = 0;
312
313	for (i = 0; i < size; i++) {
314		if (histo[i] > max)
315			max = histo[i];
316		if (histo[i] > 0 && i > maxidx)
317			maxidx = i;
318		if (histo[i] > 0 && i < minidx)
319			minidx = i;
320	}
321
322	if (max < histo_width)
323		max = histo_width;
324
325	for (i = minidx; i <= maxidx; i++) {
326		(void) printf("\t\t\t%3u: %6llu %s\n",
327		    i + offset, (u_longlong_t)histo[i],
328		    &histo_stars[(max - histo[i]) * histo_width / max]);
329	}
330}
331
332static void
333dump_zap_stats(objset_t *os, uint64_t object)
334{
335	int error;
336	zap_stats_t zs;
337
338	error = zap_get_stats(os, object, &zs);
339	if (error)
340		return;
341
342	if (zs.zs_ptrtbl_len == 0) {
343		ASSERT(zs.zs_num_blocks == 1);
344		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
345		    (u_longlong_t)zs.zs_blocksize,
346		    (u_longlong_t)zs.zs_num_entries);
347		return;
348	}
349
350	(void) printf("\tFat ZAP stats:\n");
351
352	(void) printf("\t\tPointer table:\n");
353	(void) printf("\t\t\t%llu elements\n",
354	    (u_longlong_t)zs.zs_ptrtbl_len);
355	(void) printf("\t\t\tzt_blk: %llu\n",
356	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
357	(void) printf("\t\t\tzt_numblks: %llu\n",
358	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
359	(void) printf("\t\t\tzt_shift: %llu\n",
360	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
361	(void) printf("\t\t\tzt_blks_copied: %llu\n",
362	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
363	(void) printf("\t\t\tzt_nextblk: %llu\n",
364	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
365
366	(void) printf("\t\tZAP entries: %llu\n",
367	    (u_longlong_t)zs.zs_num_entries);
368	(void) printf("\t\tLeaf blocks: %llu\n",
369	    (u_longlong_t)zs.zs_num_leafs);
370	(void) printf("\t\tTotal blocks: %llu\n",
371	    (u_longlong_t)zs.zs_num_blocks);
372	(void) printf("\t\tzap_block_type: 0x%llx\n",
373	    (u_longlong_t)zs.zs_block_type);
374	(void) printf("\t\tzap_magic: 0x%llx\n",
375	    (u_longlong_t)zs.zs_magic);
376	(void) printf("\t\tzap_salt: 0x%llx\n",
377	    (u_longlong_t)zs.zs_salt);
378
379	(void) printf("\t\tLeafs with 2^n pointers:\n");
380	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
381
382	(void) printf("\t\tBlocks with n*5 entries:\n");
383	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
384
385	(void) printf("\t\tBlocks n/10 full:\n");
386	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
387
388	(void) printf("\t\tEntries with n chunks:\n");
389	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
390
391	(void) printf("\t\tBuckets with n entries:\n");
392	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
393}
394
395/*ARGSUSED*/
396static void
397dump_none(objset_t *os, uint64_t object, void *data, size_t size)
398{
399}
400
401/*ARGSUSED*/
402static void
403dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
404{
405	(void) printf("\tUNKNOWN OBJECT TYPE\n");
406}
407
408/*ARGSUSED*/
409static void
410dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
411{
412}
413
414/*ARGSUSED*/
415static void
416dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
417{
418}
419
420/*ARGSUSED*/
421static void
422dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
423{
424	zap_cursor_t zc;
425	zap_attribute_t attr;
426	void *prop;
427	unsigned i;
428
429	dump_zap_stats(os, object);
430	(void) printf("\n");
431
432	for (zap_cursor_init(&zc, os, object);
433	    zap_cursor_retrieve(&zc, &attr) == 0;
434	    zap_cursor_advance(&zc)) {
435		(void) printf("\t\t%s = ", attr.za_name);
436		if (attr.za_num_integers == 0) {
437			(void) printf("\n");
438			continue;
439		}
440		prop = umem_zalloc(attr.za_num_integers *
441		    attr.za_integer_length, UMEM_NOFAIL);
442		(void) zap_lookup(os, object, attr.za_name,
443		    attr.za_integer_length, attr.za_num_integers, prop);
444		if (attr.za_integer_length == 1) {
445			(void) printf("%s", (char *)prop);
446		} else {
447			for (i = 0; i < attr.za_num_integers; i++) {
448				switch (attr.za_integer_length) {
449				case 2:
450					(void) printf("%u ",
451					    ((uint16_t *)prop)[i]);
452					break;
453				case 4:
454					(void) printf("%u ",
455					    ((uint32_t *)prop)[i]);
456					break;
457				case 8:
458					(void) printf("%lld ",
459					    (u_longlong_t)((int64_t *)prop)[i]);
460					break;
461				}
462			}
463		}
464		(void) printf("\n");
465		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
466	}
467	zap_cursor_fini(&zc);
468}
469
470static void
471dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
472{
473	bpobj_phys_t *bpop = data;
474	char bytes[32], comp[32], uncomp[32];
475
476	/* make sure the output won't get truncated */
477	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
478	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
479	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
480
481	if (bpop == NULL)
482		return;
483
484	zdb_nicenum(bpop->bpo_bytes, bytes, sizeof (bytes));
485	zdb_nicenum(bpop->bpo_comp, comp, sizeof (comp));
486	zdb_nicenum(bpop->bpo_uncomp, uncomp, sizeof (uncomp));
487
488	(void) printf("\t\tnum_blkptrs = %llu\n",
489	    (u_longlong_t)bpop->bpo_num_blkptrs);
490	(void) printf("\t\tbytes = %s\n", bytes);
491	if (size >= BPOBJ_SIZE_V1) {
492		(void) printf("\t\tcomp = %s\n", comp);
493		(void) printf("\t\tuncomp = %s\n", uncomp);
494	}
495	if (size >= sizeof (*bpop)) {
496		(void) printf("\t\tsubobjs = %llu\n",
497		    (u_longlong_t)bpop->bpo_subobjs);
498		(void) printf("\t\tnum_subobjs = %llu\n",
499		    (u_longlong_t)bpop->bpo_num_subobjs);
500	}
501
502	if (dump_opt['d'] < 5)
503		return;
504
505	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
506		char blkbuf[BP_SPRINTF_LEN];
507		blkptr_t bp;
508
509		int err = dmu_read(os, object,
510		    i * sizeof (bp), sizeof (bp), &bp, 0);
511		if (err != 0) {
512			(void) printf("got error %u from dmu_read\n", err);
513			break;
514		}
515		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
516		(void) printf("\t%s\n", blkbuf);
517	}
518}
519
520/* ARGSUSED */
521static void
522dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
523{
524	dmu_object_info_t doi;
525
526	VERIFY0(dmu_object_info(os, object, &doi));
527	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
528
529	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
530	if (err != 0) {
531		(void) printf("got error %u from dmu_read\n", err);
532		kmem_free(subobjs, doi.doi_max_offset);
533		return;
534	}
535
536	int64_t last_nonzero = -1;
537	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
538		if (subobjs[i] != 0)
539			last_nonzero = i;
540	}
541
542	for (int64_t i = 0; i <= last_nonzero; i++) {
543		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
544	}
545	kmem_free(subobjs, doi.doi_max_offset);
546}
547
548/*ARGSUSED*/
549static void
550dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
551{
552	dump_zap_stats(os, object);
553	/* contents are printed elsewhere, properly decoded */
554}
555
556/*ARGSUSED*/
557static void
558dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
559{
560	zap_cursor_t zc;
561	zap_attribute_t attr;
562
563	dump_zap_stats(os, object);
564	(void) printf("\n");
565
566	for (zap_cursor_init(&zc, os, object);
567	    zap_cursor_retrieve(&zc, &attr) == 0;
568	    zap_cursor_advance(&zc)) {
569		(void) printf("\t\t%s = ", attr.za_name);
570		if (attr.za_num_integers == 0) {
571			(void) printf("\n");
572			continue;
573		}
574		(void) printf(" %llx : [%d:%d:%d]\n",
575		    (u_longlong_t)attr.za_first_integer,
576		    (int)ATTR_LENGTH(attr.za_first_integer),
577		    (int)ATTR_BSWAP(attr.za_first_integer),
578		    (int)ATTR_NUM(attr.za_first_integer));
579	}
580	zap_cursor_fini(&zc);
581}
582
583/*ARGSUSED*/
584static void
585dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
586{
587	zap_cursor_t zc;
588	zap_attribute_t attr;
589	uint16_t *layout_attrs;
590	unsigned i;
591
592	dump_zap_stats(os, object);
593	(void) printf("\n");
594
595	for (zap_cursor_init(&zc, os, object);
596	    zap_cursor_retrieve(&zc, &attr) == 0;
597	    zap_cursor_advance(&zc)) {
598		(void) printf("\t\t%s = [", attr.za_name);
599		if (attr.za_num_integers == 0) {
600			(void) printf("\n");
601			continue;
602		}
603
604		VERIFY(attr.za_integer_length == 2);
605		layout_attrs = umem_zalloc(attr.za_num_integers *
606		    attr.za_integer_length, UMEM_NOFAIL);
607
608		VERIFY(zap_lookup(os, object, attr.za_name,
609		    attr.za_integer_length,
610		    attr.za_num_integers, layout_attrs) == 0);
611
612		for (i = 0; i != attr.za_num_integers; i++)
613			(void) printf(" %d ", (int)layout_attrs[i]);
614		(void) printf("]\n");
615		umem_free(layout_attrs,
616		    attr.za_num_integers * attr.za_integer_length);
617	}
618	zap_cursor_fini(&zc);
619}
620
621/*ARGSUSED*/
622static void
623dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
624{
625	zap_cursor_t zc;
626	zap_attribute_t attr;
627	const char *typenames[] = {
628		/* 0 */ "not specified",
629		/* 1 */ "FIFO",
630		/* 2 */ "Character Device",
631		/* 3 */ "3 (invalid)",
632		/* 4 */ "Directory",
633		/* 5 */ "5 (invalid)",
634		/* 6 */ "Block Device",
635		/* 7 */ "7 (invalid)",
636		/* 8 */ "Regular File",
637		/* 9 */ "9 (invalid)",
638		/* 10 */ "Symbolic Link",
639		/* 11 */ "11 (invalid)",
640		/* 12 */ "Socket",
641		/* 13 */ "Door",
642		/* 14 */ "Event Port",
643		/* 15 */ "15 (invalid)",
644	};
645
646	dump_zap_stats(os, object);
647	(void) printf("\n");
648
649	for (zap_cursor_init(&zc, os, object);
650	    zap_cursor_retrieve(&zc, &attr) == 0;
651	    zap_cursor_advance(&zc)) {
652		(void) printf("\t\t%s = %lld (type: %s)\n",
653		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
654		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
655	}
656	zap_cursor_fini(&zc);
657}
658
659static int
660get_dtl_refcount(vdev_t *vd)
661{
662	int refcount = 0;
663
664	if (vd->vdev_ops->vdev_op_leaf) {
665		space_map_t *sm = vd->vdev_dtl_sm;
666
667		if (sm != NULL &&
668		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
669			return (1);
670		return (0);
671	}
672
673	for (unsigned c = 0; c < vd->vdev_children; c++)
674		refcount += get_dtl_refcount(vd->vdev_child[c]);
675	return (refcount);
676}
677
678static int
679get_metaslab_refcount(vdev_t *vd)
680{
681	int refcount = 0;
682
683	if (vd->vdev_top == vd) {
684		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
685			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
686
687			if (sm != NULL &&
688			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
689				refcount++;
690		}
691	}
692	for (unsigned c = 0; c < vd->vdev_children; c++)
693		refcount += get_metaslab_refcount(vd->vdev_child[c]);
694
695	return (refcount);
696}
697
698static int
699get_obsolete_refcount(vdev_t *vd)
700{
701	int refcount = 0;
702
703	uint64_t obsolete_sm_obj = vdev_obsolete_sm_object(vd);
704	if (vd->vdev_top == vd && obsolete_sm_obj != 0) {
705		dmu_object_info_t doi;
706		VERIFY0(dmu_object_info(vd->vdev_spa->spa_meta_objset,
707		    obsolete_sm_obj, &doi));
708		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
709			refcount++;
710		}
711	} else {
712		ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
713		ASSERT3U(obsolete_sm_obj, ==, 0);
714	}
715	for (unsigned c = 0; c < vd->vdev_children; c++) {
716		refcount += get_obsolete_refcount(vd->vdev_child[c]);
717	}
718
719	return (refcount);
720}
721
722static int
723get_prev_obsolete_spacemap_refcount(spa_t *spa)
724{
725	uint64_t prev_obj =
726	    spa->spa_condensing_indirect_phys.scip_prev_obsolete_sm_object;
727	if (prev_obj != 0) {
728		dmu_object_info_t doi;
729		VERIFY0(dmu_object_info(spa->spa_meta_objset, prev_obj, &doi));
730		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
731			return (1);
732		}
733	}
734	return (0);
735}
736
737static int
738get_checkpoint_refcount(vdev_t *vd)
739{
740	int refcount = 0;
741
742	if (vd->vdev_top == vd && vd->vdev_top_zap != 0 &&
743	    zap_contains(spa_meta_objset(vd->vdev_spa),
744	    vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) == 0)
745		refcount++;
746
747	for (uint64_t c = 0; c < vd->vdev_children; c++)
748		refcount += get_checkpoint_refcount(vd->vdev_child[c]);
749
750	return (refcount);
751}
752
753static int
754verify_spacemap_refcounts(spa_t *spa)
755{
756	uint64_t expected_refcount = 0;
757	uint64_t actual_refcount;
758
759	(void) feature_get_refcount(spa,
760	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
761	    &expected_refcount);
762	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
763	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
764	actual_refcount += get_obsolete_refcount(spa->spa_root_vdev);
765	actual_refcount += get_prev_obsolete_spacemap_refcount(spa);
766	actual_refcount += get_checkpoint_refcount(spa->spa_root_vdev);
767
768	if (expected_refcount != actual_refcount) {
769		(void) printf("space map refcount mismatch: expected %lld != "
770		    "actual %lld\n",
771		    (longlong_t)expected_refcount,
772		    (longlong_t)actual_refcount);
773		return (2);
774	}
775	return (0);
776}
777
778static void
779dump_spacemap(objset_t *os, space_map_t *sm)
780{
781	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
782	    "INVALID", "INVALID", "INVALID", "INVALID" };
783
784	if (sm == NULL)
785		return;
786
787	(void) printf("space map object %llu:\n",
788	    (longlong_t)sm->sm_object);
789	(void) printf("  smp_length = 0x%llx\n",
790	    (longlong_t)sm->sm_phys->smp_length);
791	(void) printf("  smp_alloc = 0x%llx\n",
792	    (longlong_t)sm->sm_phys->smp_alloc);
793
794	if (dump_opt['d'] < 6 && dump_opt['m'] < 4)
795		return;
796
797	/*
798	 * Print out the freelist entries in both encoded and decoded form.
799	 */
800	uint8_t mapshift = sm->sm_shift;
801	int64_t alloc = 0;
802	uint64_t word, entry_id = 0;
803	for (uint64_t offset = 0; offset < space_map_length(sm);
804	    offset += sizeof (word)) {
805
806		VERIFY0(dmu_read(os, space_map_object(sm), offset,
807		    sizeof (word), &word, DMU_READ_PREFETCH));
808
809		if (sm_entry_is_debug(word)) {
810			(void) printf("\t    [%6llu] %s: txg %llu pass %llu\n",
811			    (u_longlong_t)entry_id,
812			    ddata[SM_DEBUG_ACTION_DECODE(word)],
813			    (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
814			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
815			entry_id++;
816			continue;
817		}
818
819		uint8_t words;
820		char entry_type;
821		uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;
822
823		if (sm_entry_is_single_word(word)) {
824			entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
825			    'A' : 'F';
826			entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
827			    sm->sm_start;
828			entry_run = SM_RUN_DECODE(word) << mapshift;
829			words = 1;
830		} else {
831			/* it is a two-word entry so we read another word */
832			ASSERT(sm_entry_is_double_word(word));
833
834			uint64_t extra_word;
835			offset += sizeof (extra_word);
836			VERIFY0(dmu_read(os, space_map_object(sm), offset,
837			    sizeof (extra_word), &extra_word,
838			    DMU_READ_PREFETCH));
839
840			ASSERT3U(offset, <=, space_map_length(sm));
841
842			entry_run = SM2_RUN_DECODE(word) << mapshift;
843			entry_vdev = SM2_VDEV_DECODE(word);
844			entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
845			    'A' : 'F';
846			entry_off = (SM2_OFFSET_DECODE(extra_word) <<
847			    mapshift) + sm->sm_start;
848			words = 2;
849		}
850
851		(void) printf("\t    [%6llu]    %c  range:"
852		    " %010llx-%010llx  size: %06llx vdev: %06llu words: %u\n",
853		    (u_longlong_t)entry_id,
854		    entry_type, (u_longlong_t)entry_off,
855		    (u_longlong_t)(entry_off + entry_run),
856		    (u_longlong_t)entry_run,
857		    (u_longlong_t)entry_vdev, words);
858
859		if (entry_type == 'A')
860			alloc += entry_run;
861		else
862			alloc -= entry_run;
863		entry_id++;
864	}
865	if (alloc != space_map_allocated(sm)) {
866		(void) printf("space_map_object alloc (%lld) INCONSISTENT "
867		    "with space map summary (%lld)\n",
868		    (longlong_t)space_map_allocated(sm), (longlong_t)alloc);
869	}
870}
871
872static void
873dump_metaslab_stats(metaslab_t *msp)
874{
875	char maxbuf[32];
876	range_tree_t *rt = msp->ms_allocatable;
877	avl_tree_t *t = &msp->ms_allocatable_by_size;
878	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
879
880	/* max sure nicenum has enough space */
881	CTASSERT(sizeof (maxbuf) >= NN_NUMBUF_SZ);
882
883	zdb_nicenum(metaslab_block_maxsize(msp), maxbuf, sizeof (maxbuf));
884
885	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
886	    "segments", avl_numnodes(t), "maxsize", maxbuf,
887	    "freepct", free_pct);
888	(void) printf("\tIn-memory histogram:\n");
889	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
890}
891
892static void
893dump_metaslab(metaslab_t *msp)
894{
895	vdev_t *vd = msp->ms_group->mg_vd;
896	spa_t *spa = vd->vdev_spa;
897	space_map_t *sm = msp->ms_sm;
898	char freebuf[32];
899
900	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf,
901	    sizeof (freebuf));
902
903	(void) printf(
904	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
905	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
906	    (u_longlong_t)space_map_object(sm), freebuf);
907
908	if (dump_opt['m'] > 2 && !dump_opt['L']) {
909		mutex_enter(&msp->ms_lock);
910		VERIFY0(metaslab_load(msp));
911		range_tree_stat_verify(msp->ms_allocatable);
912		dump_metaslab_stats(msp);
913		metaslab_unload(msp);
914		mutex_exit(&msp->ms_lock);
915	}
916
917	if (dump_opt['m'] > 1 && sm != NULL &&
918	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
919		/*
920		 * The space map histogram represents free space in chunks
921		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
922		 */
923		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
924		    (u_longlong_t)msp->ms_fragmentation);
925		dump_histogram(sm->sm_phys->smp_histogram,
926		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
927	}
928
929	ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
930	dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
931}
932
933static void
934print_vdev_metaslab_header(vdev_t *vd)
935{
936	vdev_alloc_bias_t alloc_bias = vd->vdev_alloc_bias;
937	const char *bias_str;
938
939	bias_str = (alloc_bias == VDEV_BIAS_LOG || vd->vdev_islog) ?
940	    VDEV_ALLOC_BIAS_LOG :
941	    (alloc_bias == VDEV_BIAS_SPECIAL) ? VDEV_ALLOC_BIAS_SPECIAL :
942	    (alloc_bias == VDEV_BIAS_DEDUP) ? VDEV_ALLOC_BIAS_DEDUP :
943	    vd->vdev_islog ? "log" : "";
944
945	(void) printf("\tvdev %10llu   %s\n"
946	    "\t%-10s%5llu   %-19s   %-15s   %-12s\n",
947	    (u_longlong_t)vd->vdev_id, bias_str,
948	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
949	    "offset", "spacemap", "free");
950	(void) printf("\t%15s   %19s   %15s   %12s\n",
951	    "---------------", "-------------------",
952	    "---------------", "------------");
953}
954
955static void
956dump_metaslab_groups(spa_t *spa)
957{
958	vdev_t *rvd = spa->spa_root_vdev;
959	metaslab_class_t *mc = spa_normal_class(spa);
960	uint64_t fragmentation;
961
962	metaslab_class_histogram_verify(mc);
963
964	for (unsigned c = 0; c < rvd->vdev_children; c++) {
965		vdev_t *tvd = rvd->vdev_child[c];
966		metaslab_group_t *mg = tvd->vdev_mg;
967
968		if (mg == NULL || mg->mg_class != mc)
969			continue;
970
971		metaslab_group_histogram_verify(mg);
972		mg->mg_fragmentation = metaslab_group_fragmentation(mg);
973
974		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
975		    "fragmentation",
976		    (u_longlong_t)tvd->vdev_id,
977		    (u_longlong_t)tvd->vdev_ms_count);
978		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
979			(void) printf("%3s\n", "-");
980		} else {
981			(void) printf("%3llu%%\n",
982			    (u_longlong_t)mg->mg_fragmentation);
983		}
984		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
985	}
986
987	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
988	fragmentation = metaslab_class_fragmentation(mc);
989	if (fragmentation == ZFS_FRAG_INVALID)
990		(void) printf("\t%3s\n", "-");
991	else
992		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
993	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
994}
995
996static void
997print_vdev_indirect(vdev_t *vd)
998{
999	vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
1000	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
1001	vdev_indirect_births_t *vib = vd->vdev_indirect_births;
1002
1003	if (vim == NULL) {
1004		ASSERT3P(vib, ==, NULL);
1005		return;
1006	}
1007
1008	ASSERT3U(vdev_indirect_mapping_object(vim), ==,
1009	    vic->vic_mapping_object);
1010	ASSERT3U(vdev_indirect_births_object(vib), ==,
1011	    vic->vic_births_object);
1012
1013	(void) printf("indirect births obj %llu:\n",
1014	    (longlong_t)vic->vic_births_object);
1015	(void) printf("    vib_count = %llu\n",
1016	    (longlong_t)vdev_indirect_births_count(vib));
1017	for (uint64_t i = 0; i < vdev_indirect_births_count(vib); i++) {
1018		vdev_indirect_birth_entry_phys_t *cur_vibe =
1019		    &vib->vib_entries[i];
1020		(void) printf("\toffset %llx -> txg %llu\n",
1021		    (longlong_t)cur_vibe->vibe_offset,
1022		    (longlong_t)cur_vibe->vibe_phys_birth_txg);
1023	}
1024	(void) printf("\n");
1025
1026	(void) printf("indirect mapping obj %llu:\n",
1027	    (longlong_t)vic->vic_mapping_object);
1028	(void) printf("    vim_max_offset = 0x%llx\n",
1029	    (longlong_t)vdev_indirect_mapping_max_offset(vim));
1030	(void) printf("    vim_bytes_mapped = 0x%llx\n",
1031	    (longlong_t)vdev_indirect_mapping_bytes_mapped(vim));
1032	(void) printf("    vim_count = %llu\n",
1033	    (longlong_t)vdev_indirect_mapping_num_entries(vim));
1034
1035	if (dump_opt['d'] <= 5 && dump_opt['m'] <= 3)
1036		return;
1037
1038	uint32_t *counts = vdev_indirect_mapping_load_obsolete_counts(vim);
1039
1040	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
1041		vdev_indirect_mapping_entry_phys_t *vimep =
1042		    &vim->vim_entries[i];
1043		(void) printf("\t<%llx:%llx:%llx> -> "
1044		    "<%llx:%llx:%llx> (%x obsolete)\n",
1045		    (longlong_t)vd->vdev_id,
1046		    (longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
1047		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1048		    (longlong_t)DVA_GET_VDEV(&vimep->vimep_dst),
1049		    (longlong_t)DVA_GET_OFFSET(&vimep->vimep_dst),
1050		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1051		    counts[i]);
1052	}
1053	(void) printf("\n");
1054
1055	uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd);
1056	if (obsolete_sm_object != 0) {
1057		objset_t *mos = vd->vdev_spa->spa_meta_objset;
1058		(void) printf("obsolete space map object %llu:\n",
1059		    (u_longlong_t)obsolete_sm_object);
1060		ASSERT(vd->vdev_obsolete_sm != NULL);
1061		ASSERT3U(space_map_object(vd->vdev_obsolete_sm), ==,
1062		    obsolete_sm_object);
1063		dump_spacemap(mos, vd->vdev_obsolete_sm);
1064		(void) printf("\n");
1065	}
1066}
1067
1068static void
1069dump_metaslabs(spa_t *spa)
1070{
1071	vdev_t *vd, *rvd = spa->spa_root_vdev;
1072	uint64_t m, c = 0, children = rvd->vdev_children;
1073
1074	(void) printf("\nMetaslabs:\n");
1075
1076	if (!dump_opt['d'] && zopt_objects > 0) {
1077		c = zopt_object[0];
1078
1079		if (c >= children)
1080			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
1081
1082		if (zopt_objects > 1) {
1083			vd = rvd->vdev_child[c];
1084			print_vdev_metaslab_header(vd);
1085
1086			for (m = 1; m < zopt_objects; m++) {
1087				if (zopt_object[m] < vd->vdev_ms_count)
1088					dump_metaslab(
1089					    vd->vdev_ms[zopt_object[m]]);
1090				else
1091					(void) fprintf(stderr, "bad metaslab "
1092					    "number %llu\n",
1093					    (u_longlong_t)zopt_object[m]);
1094			}
1095			(void) printf("\n");
1096			return;
1097		}
1098		children = c + 1;
1099	}
1100	for (; c < children; c++) {
1101		vd = rvd->vdev_child[c];
1102		print_vdev_metaslab_header(vd);
1103
1104		print_vdev_indirect(vd);
1105
1106		for (m = 0; m < vd->vdev_ms_count; m++)
1107			dump_metaslab(vd->vdev_ms[m]);
1108		(void) printf("\n");
1109	}
1110}
1111
1112static void
1113dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
1114{
1115	const ddt_phys_t *ddp = dde->dde_phys;
1116	const ddt_key_t *ddk = &dde->dde_key;
1117	const char *types[4] = { "ditto", "single", "double", "triple" };
1118	char blkbuf[BP_SPRINTF_LEN];
1119	blkptr_t blk;
1120
1121	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
1122		if (ddp->ddp_phys_birth == 0)
1123			continue;
1124		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
1125		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
1126		(void) printf("index %llx refcnt %llu %s %s\n",
1127		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
1128		    types[p], blkbuf);
1129	}
1130}
1131
1132static void
1133dump_dedup_ratio(const ddt_stat_t *dds)
1134{
1135	double rL, rP, rD, D, dedup, compress, copies;
1136
1137	if (dds->dds_blocks == 0)
1138		return;
1139
1140	rL = (double)dds->dds_ref_lsize;
1141	rP = (double)dds->dds_ref_psize;
1142	rD = (double)dds->dds_ref_dsize;
1143	D = (double)dds->dds_dsize;
1144
1145	dedup = rD / D;
1146	compress = rL / rP;
1147	copies = rD / rP;
1148
1149	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
1150	    "dedup * compress / copies = %.2f\n\n",
1151	    dedup, compress, copies, dedup * compress / copies);
1152}
1153
1154static void
1155dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
1156{
1157	char name[DDT_NAMELEN];
1158	ddt_entry_t dde;
1159	uint64_t walk = 0;
1160	dmu_object_info_t doi;
1161	uint64_t count, dspace, mspace;
1162	int error;
1163
1164	error = ddt_object_info(ddt, type, class, &doi);
1165
1166	if (error == ENOENT)
1167		return;
1168	ASSERT(error == 0);
1169
1170	if ((count = ddt_object_count(ddt, type, class)) == 0)
1171		return;
1172
1173	dspace = doi.doi_physical_blocks_512 << 9;
1174	mspace = doi.doi_fill_count * doi.doi_data_block_size;
1175
1176	ddt_object_name(ddt, type, class, name);
1177
1178	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
1179	    name,
1180	    (u_longlong_t)count,
1181	    (u_longlong_t)(dspace / count),
1182	    (u_longlong_t)(mspace / count));
1183
1184	if (dump_opt['D'] < 3)
1185		return;
1186
1187	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
1188
1189	if (dump_opt['D'] < 4)
1190		return;
1191
1192	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
1193		return;
1194
1195	(void) printf("%s contents:\n\n", name);
1196
1197	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
1198		dump_dde(ddt, &dde, walk);
1199
1200	ASSERT3U(error, ==, ENOENT);
1201
1202	(void) printf("\n");
1203}
1204
1205static void
1206dump_all_ddts(spa_t *spa)
1207{
1208	ddt_histogram_t ddh_total;
1209	ddt_stat_t dds_total;
1210
1211	bzero(&ddh_total, sizeof (ddh_total));
1212	bzero(&dds_total, sizeof (dds_total));
1213
1214	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
1215		ddt_t *ddt = spa->spa_ddt[c];
1216		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
1217			for (enum ddt_class class = 0; class < DDT_CLASSES;
1218			    class++) {
1219				dump_ddt(ddt, type, class);
1220			}
1221		}
1222	}
1223
1224	ddt_get_dedup_stats(spa, &dds_total);
1225
1226	if (dds_total.dds_blocks == 0) {
1227		(void) printf("All DDTs are empty\n");
1228		return;
1229	}
1230
1231	(void) printf("\n");
1232
1233	if (dump_opt['D'] > 1) {
1234		(void) printf("DDT histogram (aggregated over all DDTs):\n");
1235		ddt_get_dedup_histogram(spa, &ddh_total);
1236		zpool_dump_ddt(&dds_total, &ddh_total);
1237	}
1238
1239	dump_dedup_ratio(&dds_total);
1240}
1241
1242static void
1243dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1244{
1245	char *prefix = arg;
1246
1247	(void) printf("%s [%llu,%llu) length %llu\n",
1248	    prefix,
1249	    (u_longlong_t)start,
1250	    (u_longlong_t)(start + size),
1251	    (u_longlong_t)(size));
1252}
1253
1254static void
1255dump_dtl(vdev_t *vd, int indent)
1256{
1257	spa_t *spa = vd->vdev_spa;
1258	boolean_t required;
1259	const char *name[DTL_TYPES] = { "missing", "partial", "scrub",
1260		"outage" };
1261	char prefix[256];
1262
1263	spa_vdev_state_enter(spa, SCL_NONE);
1264	required = vdev_dtl_required(vd);
1265	(void) spa_vdev_state_exit(spa, NULL, 0);
1266
1267	if (indent == 0)
1268		(void) printf("\nDirty time logs:\n\n");
1269
1270	(void) printf("\t%*s%s [%s]\n", indent, "",
1271	    vd->vdev_path ? vd->vdev_path :
1272	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1273	    required ? "DTL-required" : "DTL-expendable");
1274
1275	for (int t = 0; t < DTL_TYPES; t++) {
1276		range_tree_t *rt = vd->vdev_dtl[t];
1277		if (range_tree_space(rt) == 0)
1278			continue;
1279		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1280		    indent + 2, "", name[t]);
1281		range_tree_walk(rt, dump_dtl_seg, prefix);
1282		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1283			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1284	}
1285
1286	for (unsigned c = 0; c < vd->vdev_children; c++)
1287		dump_dtl(vd->vdev_child[c], indent + 4);
1288}
1289
1290static void
1291dump_history(spa_t *spa)
1292{
1293	nvlist_t **events = NULL;
1294	uint64_t resid, len, off = 0;
1295	uint_t num = 0;
1296	int error;
1297	time_t tsec;
1298	struct tm t;
1299	char tbuf[30];
1300	char internalstr[MAXPATHLEN];
1301
1302	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
1303	do {
1304		len = SPA_MAXBLOCKSIZE;
1305
1306		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1307			(void) fprintf(stderr, "Unable to read history: "
1308			    "error %d\n", error);
1309			umem_free(buf, SPA_MAXBLOCKSIZE);
1310			return;
1311		}
1312
1313		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1314			break;
1315
1316		off -= resid;
1317	} while (len != 0);
1318	umem_free(buf, SPA_MAXBLOCKSIZE);
1319
1320	(void) printf("\nHistory:\n");
1321	for (unsigned i = 0; i < num; i++) {
1322		uint64_t time, txg, ievent;
1323		char *cmd, *intstr;
1324		boolean_t printed = B_FALSE;
1325
1326		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1327		    &time) != 0)
1328			goto next;
1329		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1330		    &cmd) != 0) {
1331			if (nvlist_lookup_uint64(events[i],
1332			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1333				goto next;
1334			verify(nvlist_lookup_uint64(events[i],
1335			    ZPOOL_HIST_TXG, &txg) == 0);
1336			verify(nvlist_lookup_string(events[i],
1337			    ZPOOL_HIST_INT_STR, &intstr) == 0);
1338			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1339				goto next;
1340
1341			(void) snprintf(internalstr,
1342			    sizeof (internalstr),
1343			    "[internal %s txg:%ju] %s",
1344			    zfs_history_event_names[ievent], (uintmax_t)txg,
1345			    intstr);
1346			cmd = internalstr;
1347		}
1348		tsec = time;
1349		(void) localtime_r(&tsec, &t);
1350		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1351		(void) printf("%s %s\n", tbuf, cmd);
1352		printed = B_TRUE;
1353
1354next:
1355		if (dump_opt['h'] > 1) {
1356			if (!printed)
1357				(void) printf("unrecognized record:\n");
1358			dump_nvlist(events[i], 2);
1359		}
1360	}
1361}
1362
1363/*ARGSUSED*/
1364static void
1365dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1366{
1367}
1368
1369static uint64_t
1370blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1371    const zbookmark_phys_t *zb)
1372{
1373	if (dnp == NULL) {
1374		ASSERT(zb->zb_level < 0);
1375		if (zb->zb_object == 0)
1376			return (zb->zb_blkid);
1377		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1378	}
1379
1380	ASSERT(zb->zb_level >= 0);
1381
1382	return ((zb->zb_blkid <<
1383	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1384	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1385}
1386
1387static void
1388snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1389{
1390	const dva_t *dva = bp->blk_dva;
1391	int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1392
1393	if (dump_opt['b'] >= 6) {
1394		snprintf_blkptr(blkbuf, buflen, bp);
1395		return;
1396	}
1397
1398	if (BP_IS_EMBEDDED(bp)) {
1399		(void) sprintf(blkbuf,
1400		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
1401		    (int)BPE_GET_ETYPE(bp),
1402		    (u_longlong_t)BPE_GET_LSIZE(bp),
1403		    (u_longlong_t)BPE_GET_PSIZE(bp),
1404		    (u_longlong_t)bp->blk_birth);
1405		return;
1406	}
1407
1408	blkbuf[0] = '\0';
1409	for (int i = 0; i < ndvas; i++)
1410		(void) snprintf(blkbuf + strlen(blkbuf),
1411		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1412		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1413		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1414		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1415
1416	if (BP_IS_HOLE(bp)) {
1417		(void) snprintf(blkbuf + strlen(blkbuf),
1418		    buflen - strlen(blkbuf),
1419		    "%llxL B=%llu",
1420		    (u_longlong_t)BP_GET_LSIZE(bp),
1421		    (u_longlong_t)bp->blk_birth);
1422	} else {
1423		(void) snprintf(blkbuf + strlen(blkbuf),
1424		    buflen - strlen(blkbuf),
1425		    "%llxL/%llxP F=%llu B=%llu/%llu",
1426		    (u_longlong_t)BP_GET_LSIZE(bp),
1427		    (u_longlong_t)BP_GET_PSIZE(bp),
1428		    (u_longlong_t)BP_GET_FILL(bp),
1429		    (u_longlong_t)bp->blk_birth,
1430		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1431	}
1432}
1433
1434static void
1435print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1436    const dnode_phys_t *dnp)
1437{
1438	char blkbuf[BP_SPRINTF_LEN];
1439	int l;
1440
1441	if (!BP_IS_EMBEDDED(bp)) {
1442		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1443		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1444	}
1445
1446	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1447
1448	ASSERT(zb->zb_level >= 0);
1449
1450	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1451		if (l == zb->zb_level) {
1452			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1453		} else {
1454			(void) printf(" ");
1455		}
1456	}
1457
1458	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1459	(void) printf("%s\n", blkbuf);
1460}
1461
1462static int
1463visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1464    blkptr_t *bp, const zbookmark_phys_t *zb)
1465{
1466	int err = 0;
1467
1468	if (bp->blk_birth == 0)
1469		return (0);
1470
1471	print_indirect(bp, zb, dnp);
1472
1473	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1474		arc_flags_t flags = ARC_FLAG_WAIT;
1475		int i;
1476		blkptr_t *cbp;
1477		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1478		arc_buf_t *buf;
1479		uint64_t fill = 0;
1480
1481		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1482		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1483		if (err)
1484			return (err);
1485		ASSERT(buf->b_data);
1486
1487		/* recursively visit blocks below this */
1488		cbp = buf->b_data;
1489		for (i = 0; i < epb; i++, cbp++) {
1490			zbookmark_phys_t czb;
1491
1492			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1493			    zb->zb_level - 1,
1494			    zb->zb_blkid * epb + i);
1495			err = visit_indirect(spa, dnp, cbp, &czb);
1496			if (err)
1497				break;
1498			fill += BP_GET_FILL(cbp);
1499		}
1500		if (!err)
1501			ASSERT3U(fill, ==, BP_GET_FILL(bp));
1502		arc_buf_destroy(buf, &buf);
1503	}
1504
1505	return (err);
1506}
1507
1508/*ARGSUSED*/
1509static void
1510dump_indirect(dnode_t *dn)
1511{
1512	dnode_phys_t *dnp = dn->dn_phys;
1513	int j;
1514	zbookmark_phys_t czb;
1515
1516	(void) printf("Indirect blocks:\n");
1517
1518	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1519	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1520	for (j = 0; j < dnp->dn_nblkptr; j++) {
1521		czb.zb_blkid = j;
1522		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1523		    &dnp->dn_blkptr[j], &czb);
1524	}
1525
1526	(void) printf("\n");
1527}
1528
1529/*ARGSUSED*/
1530static void
1531dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1532{
1533	dsl_dir_phys_t *dd = data;
1534	time_t crtime;
1535	char nice[32];
1536
1537	/* make sure nicenum has enough space */
1538	CTASSERT(sizeof (nice) >= NN_NUMBUF_SZ);
1539
1540	if (dd == NULL)
1541		return;
1542
1543	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1544
1545	crtime = dd->dd_creation_time;
1546	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1547	(void) printf("\t\thead_dataset_obj = %llu\n",
1548	    (u_longlong_t)dd->dd_head_dataset_obj);
1549	(void) printf("\t\tparent_dir_obj = %llu\n",
1550	    (u_longlong_t)dd->dd_parent_obj);
1551	(void) printf("\t\torigin_obj = %llu\n",
1552	    (u_longlong_t)dd->dd_origin_obj);
1553	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1554	    (u_longlong_t)dd->dd_child_dir_zapobj);
1555	zdb_nicenum(dd->dd_used_bytes, nice, sizeof (nice));
1556	(void) printf("\t\tused_bytes = %s\n", nice);
1557	zdb_nicenum(dd->dd_compressed_bytes, nice, sizeof (nice));
1558	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1559	zdb_nicenum(dd->dd_uncompressed_bytes, nice, sizeof (nice));
1560	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1561	zdb_nicenum(dd->dd_quota, nice, sizeof (nice));
1562	(void) printf("\t\tquota = %s\n", nice);
1563	zdb_nicenum(dd->dd_reserved, nice, sizeof (nice));
1564	(void) printf("\t\treserved = %s\n", nice);
1565	(void) printf("\t\tprops_zapobj = %llu\n",
1566	    (u_longlong_t)dd->dd_props_zapobj);
1567	(void) printf("\t\tdeleg_zapobj = %llu\n",
1568	    (u_longlong_t)dd->dd_deleg_zapobj);
1569	(void) printf("\t\tflags = %llx\n",
1570	    (u_longlong_t)dd->dd_flags);
1571
1572#define	DO(which) \
1573	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice, \
1574	    sizeof (nice)); \
1575	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1576	DO(HEAD);
1577	DO(SNAP);
1578	DO(CHILD);
1579	DO(CHILD_RSRV);
1580	DO(REFRSRV);
1581#undef DO
1582	(void) printf("\t\tclones = %llu\n",
1583	    (u_longlong_t)dd->dd_clones);
1584}
1585
1586/*ARGSUSED*/
1587static void
1588dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1589{
1590	dsl_dataset_phys_t *ds = data;
1591	time_t crtime;
1592	char used[32], compressed[32], uncompressed[32], unique[32];
1593	char blkbuf[BP_SPRINTF_LEN];
1594
1595	/* make sure nicenum has enough space */
1596	CTASSERT(sizeof (used) >= NN_NUMBUF_SZ);
1597	CTASSERT(sizeof (compressed) >= NN_NUMBUF_SZ);
1598	CTASSERT(sizeof (uncompressed) >= NN_NUMBUF_SZ);
1599	CTASSERT(sizeof (unique) >= NN_NUMBUF_SZ);
1600
1601	if (ds == NULL)
1602		return;
1603
1604	ASSERT(size == sizeof (*ds));
1605	crtime = ds->ds_creation_time;
1606	zdb_nicenum(ds->ds_referenced_bytes, used, sizeof (used));
1607	zdb_nicenum(ds->ds_compressed_bytes, compressed, sizeof (compressed));
1608	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed,
1609	    sizeof (uncompressed));
1610	zdb_nicenum(ds->ds_unique_bytes, unique, sizeof (unique));
1611	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1612
1613	(void) printf("\t\tdir_obj = %llu\n",
1614	    (u_longlong_t)ds->ds_dir_obj);
1615	(void) printf("\t\tprev_snap_obj = %llu\n",
1616	    (u_longlong_t)ds->ds_prev_snap_obj);
1617	(void) printf("\t\tprev_snap_txg = %llu\n",
1618	    (u_longlong_t)ds->ds_prev_snap_txg);
1619	(void) printf("\t\tnext_snap_obj = %llu\n",
1620	    (u_longlong_t)ds->ds_next_snap_obj);
1621	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1622	    (u_longlong_t)ds->ds_snapnames_zapobj);
1623	(void) printf("\t\tnum_children = %llu\n",
1624	    (u_longlong_t)ds->ds_num_children);
1625	(void) printf("\t\tuserrefs_obj = %llu\n",
1626	    (u_longlong_t)ds->ds_userrefs_obj);
1627	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1628	(void) printf("\t\tcreation_txg = %llu\n",
1629	    (u_longlong_t)ds->ds_creation_txg);
1630	(void) printf("\t\tdeadlist_obj = %llu\n",
1631	    (u_longlong_t)ds->ds_deadlist_obj);
1632	(void) printf("\t\tused_bytes = %s\n", used);
1633	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1634	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1635	(void) printf("\t\tunique = %s\n", unique);
1636	(void) printf("\t\tfsid_guid = %llu\n",
1637	    (u_longlong_t)ds->ds_fsid_guid);
1638	(void) printf("\t\tguid = %llu\n",
1639	    (u_longlong_t)ds->ds_guid);
1640	(void) printf("\t\tflags = %llx\n",
1641	    (u_longlong_t)ds->ds_flags);
1642	(void) printf("\t\tnext_clones_obj = %llu\n",
1643	    (u_longlong_t)ds->ds_next_clones_obj);
1644	(void) printf("\t\tprops_obj = %llu\n",
1645	    (u_longlong_t)ds->ds_props_obj);
1646	(void) printf("\t\tbp = %s\n", blkbuf);
1647}
1648
1649/* ARGSUSED */
1650static int
1651dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1652{
1653	char blkbuf[BP_SPRINTF_LEN];
1654
1655	if (bp->blk_birth != 0) {
1656		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1657		(void) printf("\t%s\n", blkbuf);
1658	}
1659	return (0);
1660}
1661
1662static void
1663dump_bptree(objset_t *os, uint64_t obj, const char *name)
1664{
1665	char bytes[32];
1666	bptree_phys_t *bt;
1667	dmu_buf_t *db;
1668
1669	/* make sure nicenum has enough space */
1670	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1671
1672	if (dump_opt['d'] < 3)
1673		return;
1674
1675	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1676	bt = db->db_data;
1677	zdb_nicenum(bt->bt_bytes, bytes, sizeof (bytes));
1678	(void) printf("\n    %s: %llu datasets, %s\n",
1679	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1680	dmu_buf_rele(db, FTAG);
1681
1682	if (dump_opt['d'] < 5)
1683		return;
1684
1685	(void) printf("\n");
1686
1687	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1688}
1689
1690/* ARGSUSED */
1691static int
1692dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1693{
1694	char blkbuf[BP_SPRINTF_LEN];
1695
1696	ASSERT(bp->blk_birth != 0);
1697	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1698	(void) printf("\t%s\n", blkbuf);
1699	return (0);
1700}
1701
1702static void
1703dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
1704{
1705	char bytes[32];
1706	char comp[32];
1707	char uncomp[32];
1708
1709	/* make sure nicenum has enough space */
1710	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1711	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1712	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1713
1714	if (dump_opt['d'] < 3)
1715		return;
1716
1717	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes, sizeof (bytes));
1718	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1719		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp, sizeof (comp));
1720		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp, sizeof (uncomp));
1721		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1722		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1723		    indent * 8, name,
1724		    (u_longlong_t)bpo->bpo_object,
1725		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1726		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1727		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1728		    bytes, comp, uncomp);
1729
1730		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1731			uint64_t subobj;
1732			bpobj_t subbpo;
1733			int error;
1734			VERIFY0(dmu_read(bpo->bpo_os,
1735			    bpo->bpo_phys->bpo_subobjs,
1736			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1737			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1738			if (error != 0) {
1739				(void) printf("ERROR %u while trying to open "
1740				    "subobj id %llu\n",
1741				    error, (u_longlong_t)subobj);
1742				continue;
1743			}
1744			dump_full_bpobj(&subbpo, "subobj", indent + 1);
1745			bpobj_close(&subbpo);
1746		}
1747	} else {
1748		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1749		    indent * 8, name,
1750		    (u_longlong_t)bpo->bpo_object,
1751		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1752		    bytes);
1753	}
1754
1755	if (dump_opt['d'] < 5)
1756		return;
1757
1758
1759	if (indent == 0) {
1760		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1761		(void) printf("\n");
1762	}
1763}
1764
1765static void
1766bpobj_count_refd(bpobj_t *bpo)
1767{
1768	mos_obj_refd(bpo->bpo_object);
1769
1770	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1771		mos_obj_refd(bpo->bpo_phys->bpo_subobjs);
1772		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1773			uint64_t subobj;
1774			bpobj_t subbpo;
1775			int error;
1776			VERIFY0(dmu_read(bpo->bpo_os,
1777			    bpo->bpo_phys->bpo_subobjs,
1778			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1779			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1780			if (error != 0) {
1781				(void) printf("ERROR %u while trying to open "
1782				    "subobj id %llu\n",
1783				    error, (u_longlong_t)subobj);
1784				continue;
1785			}
1786			bpobj_count_refd(&subbpo);
1787			bpobj_close(&subbpo);
1788		}
1789	}
1790}
1791
1792static void
1793dump_deadlist(dsl_deadlist_t *dl)
1794{
1795	dsl_deadlist_entry_t *dle;
1796	uint64_t unused;
1797	char bytes[32];
1798	char comp[32];
1799	char uncomp[32];
1800	uint64_t empty_bpobj =
1801	    dmu_objset_spa(dl->dl_os)->spa_dsl_pool->dp_empty_bpobj;
1802
1803	/* force the tree to be loaded */
1804	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1805
1806	if (dl->dl_oldfmt) {
1807		if (dl->dl_bpobj.bpo_object != empty_bpobj)
1808			bpobj_count_refd(&dl->dl_bpobj);
1809	} else {
1810		mos_obj_refd(dl->dl_object);
1811		for (dle = avl_first(&dl->dl_tree); dle;
1812		    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1813			if (dle->dle_bpobj.bpo_object != empty_bpobj)
1814				bpobj_count_refd(&dle->dle_bpobj);
1815		}
1816	}
1817
1818	/* make sure nicenum has enough space */
1819	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1820	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1821	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1822
1823	if (dump_opt['d'] < 3)
1824		return;
1825
1826	if (dl->dl_oldfmt) {
1827		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1828		return;
1829	}
1830
1831	zdb_nicenum(dl->dl_phys->dl_used, bytes, sizeof (bytes));
1832	zdb_nicenum(dl->dl_phys->dl_comp, comp, sizeof (comp));
1833	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp, sizeof (uncomp));
1834	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1835	    bytes, comp, uncomp);
1836
1837	if (dump_opt['d'] < 4)
1838		return;
1839
1840	(void) printf("\n");
1841
1842	for (dle = avl_first(&dl->dl_tree); dle;
1843	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1844		if (dump_opt['d'] >= 5) {
1845			char buf[128];
1846			(void) snprintf(buf, sizeof (buf),
1847			    "mintxg %llu -> obj %llu",
1848			    (longlong_t)dle->dle_mintxg,
1849			    (longlong_t)dle->dle_bpobj.bpo_object);
1850
1851			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1852		} else {
1853			(void) printf("mintxg %llu -> obj %llu\n",
1854			    (longlong_t)dle->dle_mintxg,
1855			    (longlong_t)dle->dle_bpobj.bpo_object);
1856		}
1857	}
1858}
1859
1860static avl_tree_t idx_tree;
1861static avl_tree_t domain_tree;
1862static boolean_t fuid_table_loaded;
1863static objset_t *sa_os = NULL;
1864static sa_attr_type_t *sa_attr_table = NULL;
1865
1866static int
1867open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
1868{
1869	int err;
1870	uint64_t sa_attrs = 0;
1871	uint64_t version = 0;
1872
1873	VERIFY3P(sa_os, ==, NULL);
1874	err = dmu_objset_own(path, type, B_TRUE, tag, osp);
1875	if (err != 0) {
1876		(void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
1877		    strerror(err));
1878		return (err);
1879	}
1880
1881	if (dmu_objset_type(*osp) == DMU_OST_ZFS) {
1882		(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1883		    8, 1, &version);
1884		if (version >= ZPL_VERSION_SA) {
1885			(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1886			    8, 1, &sa_attrs);
1887		}
1888		err = sa_setup(*osp, sa_attrs, zfs_attr_table, ZPL_END,
1889		    &sa_attr_table);
1890		if (err != 0) {
1891			(void) fprintf(stderr, "sa_setup failed: %s\n",
1892			    strerror(err));
1893			dmu_objset_disown(*osp, tag);
1894			*osp = NULL;
1895		}
1896	}
1897	sa_os = *osp;
1898
1899	return (0);
1900}
1901
1902static void
1903close_objset(objset_t *os, void *tag)
1904{
1905	VERIFY3P(os, ==, sa_os);
1906	if (os->os_sa != NULL)
1907		sa_tear_down(os);
1908	dmu_objset_disown(os, tag);
1909	sa_attr_table = NULL;
1910	sa_os = NULL;
1911}
1912
1913static void
1914fuid_table_destroy()
1915{
1916	if (fuid_table_loaded) {
1917		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1918		fuid_table_loaded = B_FALSE;
1919	}
1920}
1921
1922/*
1923 * print uid or gid information.
1924 * For normal POSIX id just the id is printed in decimal format.
1925 * For CIFS files with FUID the fuid is printed in hex followed by
1926 * the domain-rid string.
1927 */
1928static void
1929print_idstr(uint64_t id, const char *id_type)
1930{
1931	if (FUID_INDEX(id)) {
1932		char *domain;
1933
1934		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1935		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1936		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1937	} else {
1938		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1939	}
1940
1941}
1942
1943static void
1944dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1945{
1946	uint32_t uid_idx, gid_idx;
1947
1948	uid_idx = FUID_INDEX(uid);
1949	gid_idx = FUID_INDEX(gid);
1950
1951	/* Load domain table, if not already loaded */
1952	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1953		uint64_t fuid_obj;
1954
1955		/* first find the fuid object.  It lives in the master node */
1956		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1957		    8, 1, &fuid_obj) == 0);
1958		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1959		(void) zfs_fuid_table_load(os, fuid_obj,
1960		    &idx_tree, &domain_tree);
1961		fuid_table_loaded = B_TRUE;
1962	}
1963
1964	print_idstr(uid, "uid");
1965	print_idstr(gid, "gid");
1966}
1967
1968/*ARGSUSED*/
1969static void
1970dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1971{
1972	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
1973	sa_handle_t *hdl;
1974	uint64_t xattr, rdev, gen;
1975	uint64_t uid, gid, mode, fsize, parent, links;
1976	uint64_t pflags;
1977	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1978	time_t z_crtime, z_atime, z_mtime, z_ctime;
1979	sa_bulk_attr_t bulk[12];
1980	int idx = 0;
1981	int error;
1982
1983	VERIFY3P(os, ==, sa_os);
1984	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1985		(void) printf("Failed to get handle for SA znode\n");
1986		return;
1987	}
1988
1989	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1990	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1991	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1992	    &links, 8);
1993	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1994	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1995	    &mode, 8);
1996	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1997	    NULL, &parent, 8);
1998	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
1999	    &fsize, 8);
2000	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
2001	    acctm, 16);
2002	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
2003	    modtm, 16);
2004	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
2005	    crtm, 16);
2006	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
2007	    chgtm, 16);
2008	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
2009	    &pflags, 8);
2010
2011	if (sa_bulk_lookup(hdl, bulk, idx)) {
2012		(void) sa_handle_destroy(hdl);
2013		return;
2014	}
2015
2016	z_crtime = (time_t)crtm[0];
2017	z_atime = (time_t)acctm[0];
2018	z_mtime = (time_t)modtm[0];
2019	z_ctime = (time_t)chgtm[0];
2020
2021	if (dump_opt['d'] > 4) {
2022		error = zfs_obj_to_path(os, object, path, sizeof (path));
2023		if (error == ESTALE) {
2024			(void) snprintf(path, sizeof (path), "on delete queue");
2025		} else if (error != 0) {
2026			leaked_objects++;
2027			(void) snprintf(path, sizeof (path),
2028			    "path not found, possibly leaked");
2029		}
2030		(void) printf("\tpath	%s\n", path);
2031	}
2032	dump_uidgid(os, uid, gid);
2033	(void) printf("\tatime	%s", ctime(&z_atime));
2034	(void) printf("\tmtime	%s", ctime(&z_mtime));
2035	(void) printf("\tctime	%s", ctime(&z_ctime));
2036	(void) printf("\tcrtime	%s", ctime(&z_crtime));
2037	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
2038	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
2039	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
2040	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
2041	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
2042	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
2043	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
2044	    sizeof (uint64_t)) == 0)
2045		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
2046	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
2047	    sizeof (uint64_t)) == 0)
2048		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
2049	sa_handle_destroy(hdl);
2050}
2051
2052/*ARGSUSED*/
2053static void
2054dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
2055{
2056}
2057
2058/*ARGSUSED*/
2059static void
2060dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
2061{
2062}
2063
2064static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
2065	dump_none,		/* unallocated			*/
2066	dump_zap,		/* object directory		*/
2067	dump_uint64,		/* object array			*/
2068	dump_none,		/* packed nvlist		*/
2069	dump_packed_nvlist,	/* packed nvlist size		*/
2070	dump_none,		/* bpobj			*/
2071	dump_bpobj,		/* bpobj header			*/
2072	dump_none,		/* SPA space map header		*/
2073	dump_none,		/* SPA space map		*/
2074	dump_none,		/* ZIL intent log		*/
2075	dump_dnode,		/* DMU dnode			*/
2076	dump_dmu_objset,	/* DMU objset			*/
2077	dump_dsl_dir,		/* DSL directory		*/
2078	dump_zap,		/* DSL directory child map	*/
2079	dump_zap,		/* DSL dataset snap map		*/
2080	dump_zap,		/* DSL props			*/
2081	dump_dsl_dataset,	/* DSL dataset			*/
2082	dump_znode,		/* ZFS znode			*/
2083	dump_acl,		/* ZFS V0 ACL			*/
2084	dump_uint8,		/* ZFS plain file		*/
2085	dump_zpldir,		/* ZFS directory		*/
2086	dump_zap,		/* ZFS master node		*/
2087	dump_zap,		/* ZFS delete queue		*/
2088	dump_uint8,		/* zvol object			*/
2089	dump_zap,		/* zvol prop			*/
2090	dump_uint8,		/* other uint8[]		*/
2091	dump_uint64,		/* other uint64[]		*/
2092	dump_zap,		/* other ZAP			*/
2093	dump_zap,		/* persistent error log		*/
2094	dump_uint8,		/* SPA history			*/
2095	dump_history_offsets,	/* SPA history offsets		*/
2096	dump_zap,		/* Pool properties		*/
2097	dump_zap,		/* DSL permissions		*/
2098	dump_acl,		/* ZFS ACL			*/
2099	dump_uint8,		/* ZFS SYSACL			*/
2100	dump_none,		/* FUID nvlist			*/
2101	dump_packed_nvlist,	/* FUID nvlist size		*/
2102	dump_zap,		/* DSL dataset next clones	*/
2103	dump_zap,		/* DSL scrub queue		*/
2104	dump_zap,		/* ZFS user/group used		*/
2105	dump_zap,		/* ZFS user/group quota		*/
2106	dump_zap,		/* snapshot refcount tags	*/
2107	dump_ddt_zap,		/* DDT ZAP object		*/
2108	dump_zap,		/* DDT statistics		*/
2109	dump_znode,		/* SA object			*/
2110	dump_zap,		/* SA Master Node		*/
2111	dump_sa_attrs,		/* SA attribute registration	*/
2112	dump_sa_layouts,	/* SA attribute layouts		*/
2113	dump_zap,		/* DSL scrub translations	*/
2114	dump_none,		/* fake dedup BP		*/
2115	dump_zap,		/* deadlist			*/
2116	dump_none,		/* deadlist hdr			*/
2117	dump_zap,		/* dsl clones			*/
2118	dump_bpobj_subobjs,	/* bpobj subobjs		*/
2119	dump_unknown,		/* Unknown type, must be last	*/
2120};
2121
2122static void
2123dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header,
2124    uint64_t *dnode_slots_used)
2125{
2126	dmu_buf_t *db = NULL;
2127	dmu_object_info_t doi;
2128	dnode_t *dn;
2129	void *bonus = NULL;
2130	size_t bsize = 0;
2131	char iblk[32], dblk[32], lsize[32], asize[32], fill[32], dnsize[32];
2132	char bonus_size[32];
2133	char aux[50];
2134	int error;
2135
2136	/* make sure nicenum has enough space */
2137	CTASSERT(sizeof (iblk) >= NN_NUMBUF_SZ);
2138	CTASSERT(sizeof (dblk) >= NN_NUMBUF_SZ);
2139	CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
2140	CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
2141	CTASSERT(sizeof (bonus_size) >= NN_NUMBUF_SZ);
2142
2143	if (*print_header) {
2144		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %6s  %5s  %6s  %s\n",
2145		    "Object", "lvl", "iblk", "dblk", "dsize", "dnsize",
2146		    "lsize", "%full", "type");
2147		*print_header = 0;
2148	}
2149
2150	if (object == 0) {
2151		dn = DMU_META_DNODE(os);
2152	} else {
2153		error = dmu_bonus_hold(os, object, FTAG, &db);
2154		if (error)
2155			fatal("dmu_bonus_hold(%llu) failed, errno %u",
2156			    object, error);
2157		bonus = db->db_data;
2158		bsize = db->db_size;
2159		dn = DB_DNODE((dmu_buf_impl_t *)db);
2160	}
2161	dmu_object_info_from_dnode(dn, &doi);
2162
2163	if (dnode_slots_used != NULL)
2164		*dnode_slots_used = doi.doi_dnodesize / DNODE_MIN_SIZE;
2165
2166	zdb_nicenum(doi.doi_metadata_block_size, iblk, sizeof (iblk));
2167	zdb_nicenum(doi.doi_data_block_size, dblk, sizeof (dblk));
2168	zdb_nicenum(doi.doi_max_offset, lsize, sizeof (lsize));
2169	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize, sizeof (asize));
2170	zdb_nicenum(doi.doi_bonus_size, bonus_size, sizeof (bonus_size));
2171	zdb_nicenum(doi.doi_dnodesize, dnsize, sizeof (dnsize));
2172	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
2173	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
2174	    doi.doi_max_offset);
2175
2176	aux[0] = '\0';
2177
2178	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
2179		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
2180		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
2181	}
2182
2183	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
2184		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
2185		    ZDB_COMPRESS_NAME(doi.doi_compress));
2186	}
2187
2188	(void) printf("%10" PRIu64
2189	    "  %3u  %5s  %5s  %5s  %5s  %5s  %6s  %s%s\n",
2190	    object, doi.doi_indirection, iblk, dblk,
2191	    asize, dnsize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
2192
2193	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
2194		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %5s  %6s  %s\n",
2195		    "", "", "", "", "", "", bonus_size, "bonus",
2196		    ZDB_OT_NAME(doi.doi_bonus_type));
2197	}
2198
2199	if (verbosity >= 4) {
2200		(void) printf("\tdnode flags: %s%s%s\n",
2201		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
2202		    "USED_BYTES " : "",
2203		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
2204		    "USERUSED_ACCOUNTED " : "",
2205		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
2206		    "SPILL_BLKPTR" : "");
2207		(void) printf("\tdnode maxblkid: %llu\n",
2208		    (longlong_t)dn->dn_phys->dn_maxblkid);
2209
2210		object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
2211		    bonus, bsize);
2212		object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
2213		*print_header = 1;
2214	}
2215
2216	if (verbosity >= 5)
2217		dump_indirect(dn);
2218
2219	if (verbosity >= 5) {
2220		/*
2221		 * Report the list of segments that comprise the object.
2222		 */
2223		uint64_t start = 0;
2224		uint64_t end;
2225		uint64_t blkfill = 1;
2226		int minlvl = 1;
2227
2228		if (dn->dn_type == DMU_OT_DNODE) {
2229			minlvl = 0;
2230			blkfill = DNODES_PER_BLOCK;
2231		}
2232
2233		for (;;) {
2234			char segsize[32];
2235			/* make sure nicenum has enough space */
2236			CTASSERT(sizeof (segsize) >= NN_NUMBUF_SZ);
2237			error = dnode_next_offset(dn,
2238			    0, &start, minlvl, blkfill, 0);
2239			if (error)
2240				break;
2241			end = start;
2242			error = dnode_next_offset(dn,
2243			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
2244			zdb_nicenum(end - start, segsize, sizeof (segsize));
2245			(void) printf("\t\tsegment [%016llx, %016llx)"
2246			    " size %5s\n", (u_longlong_t)start,
2247			    (u_longlong_t)end, segsize);
2248			if (error)
2249				break;
2250			start = end;
2251		}
2252	}
2253
2254	if (db != NULL)
2255		dmu_buf_rele(db, FTAG);
2256}
2257
2258static void
2259count_dir_mos_objects(dsl_dir_t *dd)
2260{
2261	mos_obj_refd(dd->dd_object);
2262	mos_obj_refd(dsl_dir_phys(dd)->dd_child_dir_zapobj);
2263	mos_obj_refd(dsl_dir_phys(dd)->dd_deleg_zapobj);
2264	mos_obj_refd(dsl_dir_phys(dd)->dd_props_zapobj);
2265	mos_obj_refd(dsl_dir_phys(dd)->dd_clones);
2266}
2267
2268static void
2269count_ds_mos_objects(dsl_dataset_t *ds)
2270{
2271	mos_obj_refd(ds->ds_object);
2272	mos_obj_refd(dsl_dataset_phys(ds)->ds_next_clones_obj);
2273	mos_obj_refd(dsl_dataset_phys(ds)->ds_props_obj);
2274	mos_obj_refd(dsl_dataset_phys(ds)->ds_userrefs_obj);
2275	mos_obj_refd(dsl_dataset_phys(ds)->ds_snapnames_zapobj);
2276
2277	if (!dsl_dataset_is_snapshot(ds)) {
2278		count_dir_mos_objects(ds->ds_dir);
2279	}
2280}
2281
2282static const char *objset_types[DMU_OST_NUMTYPES] = {
2283	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
2284
2285static void
2286dump_dir(objset_t *os)
2287{
2288	dmu_objset_stats_t dds;
2289	uint64_t object, object_count;
2290	uint64_t refdbytes, usedobjs, scratch;
2291	char numbuf[32];
2292	char blkbuf[BP_SPRINTF_LEN + 20];
2293	char osname[ZFS_MAX_DATASET_NAME_LEN];
2294	const char *type = "UNKNOWN";
2295	int verbosity = dump_opt['d'];
2296	int print_header = 1;
2297	unsigned i;
2298	int error;
2299	uint64_t total_slots_used = 0;
2300	uint64_t max_slot_used = 0;
2301	uint64_t dnode_slots;
2302
2303	/* make sure nicenum has enough space */
2304	CTASSERT(sizeof (numbuf) >= NN_NUMBUF_SZ);
2305
2306	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
2307	dmu_objset_fast_stat(os, &dds);
2308	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
2309
2310	if (dds.dds_type < DMU_OST_NUMTYPES)
2311		type = objset_types[dds.dds_type];
2312
2313	if (dds.dds_type == DMU_OST_META) {
2314		dds.dds_creation_txg = TXG_INITIAL;
2315		usedobjs = BP_GET_FILL(os->os_rootbp);
2316		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
2317		    dd_used_bytes;
2318	} else {
2319		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
2320	}
2321
2322	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
2323
2324	zdb_nicenum(refdbytes, numbuf, sizeof (numbuf));
2325
2326	if (verbosity >= 4) {
2327		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
2328		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
2329		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
2330	} else {
2331		blkbuf[0] = '\0';
2332	}
2333
2334	dmu_objset_name(os, osname);
2335
2336	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
2337	    "%s, %llu objects%s%s\n",
2338	    osname, type, (u_longlong_t)dmu_objset_id(os),
2339	    (u_longlong_t)dds.dds_creation_txg,
2340	    numbuf, (u_longlong_t)usedobjs, blkbuf,
2341	    (dds.dds_inconsistent) ? " (inconsistent)" : "");
2342
2343	if (zopt_objects != 0) {
2344		for (i = 0; i < zopt_objects; i++)
2345			dump_object(os, zopt_object[i], verbosity,
2346			    &print_header, NULL);
2347		(void) printf("\n");
2348		return;
2349	}
2350
2351	if (dump_opt['i'] != 0 || verbosity >= 2)
2352		dump_intent_log(dmu_objset_zil(os));
2353
2354	if (dmu_objset_ds(os) != NULL) {
2355		dsl_dataset_t *ds = dmu_objset_ds(os);
2356		dump_deadlist(&ds->ds_deadlist);
2357
2358		if (dsl_dataset_remap_deadlist_exists(ds)) {
2359			(void) printf("ds_remap_deadlist:\n");
2360			dump_deadlist(&ds->ds_remap_deadlist);
2361		}
2362		count_ds_mos_objects(ds);
2363	}
2364
2365	if (verbosity < 2)
2366		return;
2367
2368	if (BP_IS_HOLE(os->os_rootbp))
2369		return;
2370
2371	dump_object(os, 0, verbosity, &print_header, NULL);
2372	object_count = 0;
2373	if (DMU_USERUSED_DNODE(os) != NULL &&
2374	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
2375		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header,
2376		    NULL);
2377		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header,
2378		    NULL);
2379	}
2380
2381	object = 0;
2382	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2383		dump_object(os, object, verbosity, &print_header, &dnode_slots);
2384		object_count++;
2385		total_slots_used += dnode_slots;
2386		max_slot_used = object + dnode_slots - 1;
2387	}
2388
2389	(void) printf("\n");
2390
2391	(void) printf("    Dnode slots:\n");
2392	(void) printf("\tTotal used:    %10llu\n",
2393	    (u_longlong_t)total_slots_used);
2394	(void) printf("\tMax used:      %10llu\n",
2395	    (u_longlong_t)max_slot_used);
2396	(void) printf("\tPercent empty: %10lf\n",
2397	    (double)(max_slot_used - total_slots_used)*100 /
2398	    (double)max_slot_used);
2399
2400	(void) printf("\n");
2401
2402	if (error != ESRCH) {
2403		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2404		abort();
2405	}
2406	if (leaked_objects != 0) {
2407		(void) printf("%d potentially leaked objects detected\n",
2408		    leaked_objects);
2409		leaked_objects = 0;
2410	}
2411
2412	ASSERT3U(object_count, ==, usedobjs);
2413}
2414
2415static void
2416dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2417{
2418	time_t timestamp = ub->ub_timestamp;
2419
2420	(void) printf("%s", header ? header : "");
2421	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2422	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2423	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2424	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2425	(void) printf("\ttimestamp = %llu UTC = %s",
2426	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2427
2428	(void) printf("\tmmp_magic = %016llx\n",
2429	    (u_longlong_t)ub->ub_mmp_magic);
2430	if (ub->ub_mmp_magic == MMP_MAGIC)
2431		(void) printf("\tmmp_delay = %0llu\n",
2432		    (u_longlong_t)ub->ub_mmp_delay);
2433
2434	if (dump_opt['u'] >= 3) {
2435		char blkbuf[BP_SPRINTF_LEN];
2436		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2437		(void) printf("\trootbp = %s\n", blkbuf);
2438	}
2439	(void) printf("\tcheckpoint_txg = %llu\n",
2440	    (u_longlong_t)ub->ub_checkpoint_txg);
2441	(void) printf("%s", footer ? footer : "");
2442}
2443
2444static void
2445dump_config(spa_t *spa)
2446{
2447	dmu_buf_t *db;
2448	size_t nvsize = 0;
2449	int error = 0;
2450
2451
2452	error = dmu_bonus_hold(spa->spa_meta_objset,
2453	    spa->spa_config_object, FTAG, &db);
2454
2455	if (error == 0) {
2456		nvsize = *(uint64_t *)db->db_data;
2457		dmu_buf_rele(db, FTAG);
2458
2459		(void) printf("\nMOS Configuration:\n");
2460		dump_packed_nvlist(spa->spa_meta_objset,
2461		    spa->spa_config_object, (void *)&nvsize, 1);
2462	} else {
2463		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2464		    (u_longlong_t)spa->spa_config_object, error);
2465	}
2466}
2467
2468static void
2469dump_cachefile(const char *cachefile)
2470{
2471	int fd;
2472	struct stat64 statbuf;
2473	char *buf;
2474	nvlist_t *config;
2475
2476	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2477		(void) printf("cannot open '%s': %s\n", cachefile,
2478		    strerror(errno));
2479		exit(1);
2480	}
2481
2482	if (fstat64(fd, &statbuf) != 0) {
2483		(void) printf("failed to stat '%s': %s\n", cachefile,
2484		    strerror(errno));
2485		exit(1);
2486	}
2487
2488	if ((buf = malloc(statbuf.st_size)) == NULL) {
2489		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
2490		    (u_longlong_t)statbuf.st_size);
2491		exit(1);
2492	}
2493
2494	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2495		(void) fprintf(stderr, "failed to read %llu bytes\n",
2496		    (u_longlong_t)statbuf.st_size);
2497		exit(1);
2498	}
2499
2500	(void) close(fd);
2501
2502	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2503		(void) fprintf(stderr, "failed to unpack nvlist\n");
2504		exit(1);
2505	}
2506
2507	free(buf);
2508
2509	dump_nvlist(config, 0);
2510
2511	nvlist_free(config);
2512}
2513
2514#define	ZDB_MAX_UB_HEADER_SIZE 32
2515
2516static void
2517dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2518{
2519	vdev_t vd;
2520	vdev_t *vdp = &vd;
2521	char header[ZDB_MAX_UB_HEADER_SIZE];
2522
2523	vd.vdev_ashift = ashift;
2524	vdp->vdev_top = vdp;
2525
2526	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2527		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2528		uberblock_t *ub = (void *)((char *)lbl + uoff);
2529
2530		if (uberblock_verify(ub))
2531			continue;
2532
2533		if ((dump_opt['u'] < 4) &&
2534		    (ub->ub_mmp_magic == MMP_MAGIC) && ub->ub_mmp_delay &&
2535		    (i >= VDEV_UBERBLOCK_COUNT(&vd) - MMP_BLOCKS_PER_LABEL))
2536			continue;
2537
2538		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2539		    "Uberblock[%d]\n", i);
2540		dump_uberblock(ub, header, "");
2541	}
2542}
2543
2544static char curpath[PATH_MAX];
2545
2546/*
2547 * Iterate through the path components, recursively passing
2548 * current one's obj and remaining path until we find the obj
2549 * for the last one.
2550 */
2551static int
2552dump_path_impl(objset_t *os, uint64_t obj, char *name)
2553{
2554	int err;
2555	int header = 1;
2556	uint64_t child_obj;
2557	char *s;
2558	dmu_buf_t *db;
2559	dmu_object_info_t doi;
2560
2561	if ((s = strchr(name, '/')) != NULL)
2562		*s = '\0';
2563	err = zap_lookup(os, obj, name, 8, 1, &child_obj);
2564
2565	(void) strlcat(curpath, name, sizeof (curpath));
2566
2567	if (err != 0) {
2568		(void) fprintf(stderr, "failed to lookup %s: %s\n",
2569		    curpath, strerror(err));
2570		return (err);
2571	}
2572
2573	child_obj = ZFS_DIRENT_OBJ(child_obj);
2574	err = sa_buf_hold(os, child_obj, FTAG, &db);
2575	if (err != 0) {
2576		(void) fprintf(stderr,
2577		    "failed to get SA dbuf for obj %llu: %s\n",
2578		    (u_longlong_t)child_obj, strerror(err));
2579		return (EINVAL);
2580	}
2581	dmu_object_info_from_db(db, &doi);
2582	sa_buf_rele(db, FTAG);
2583
2584	if (doi.doi_bonus_type != DMU_OT_SA &&
2585	    doi.doi_bonus_type != DMU_OT_ZNODE) {
2586		(void) fprintf(stderr, "invalid bonus type %d for obj %llu\n",
2587		    doi.doi_bonus_type, (u_longlong_t)child_obj);
2588		return (EINVAL);
2589	}
2590
2591	if (dump_opt['v'] > 6) {
2592		(void) printf("obj=%llu %s type=%d bonustype=%d\n",
2593		    (u_longlong_t)child_obj, curpath, doi.doi_type,
2594		    doi.doi_bonus_type);
2595	}
2596
2597	(void) strlcat(curpath, "/", sizeof (curpath));
2598
2599	switch (doi.doi_type) {
2600	case DMU_OT_DIRECTORY_CONTENTS:
2601		if (s != NULL && *(s + 1) != '\0')
2602			return (dump_path_impl(os, child_obj, s + 1));
2603		/*FALLTHROUGH*/
2604	case DMU_OT_PLAIN_FILE_CONTENTS:
2605		dump_object(os, child_obj, dump_opt['v'], &header, NULL);
2606		return (0);
2607	default:
2608		(void) fprintf(stderr, "object %llu has non-file/directory "
2609		    "type %d\n", (u_longlong_t)obj, doi.doi_type);
2610		break;
2611	}
2612
2613	return (EINVAL);
2614}
2615
2616/*
2617 * Dump the blocks for the object specified by path inside the dataset.
2618 */
2619static int
2620dump_path(char *ds, char *path)
2621{
2622	int err;
2623	objset_t *os;
2624	uint64_t root_obj;
2625
2626	err = open_objset(ds, DMU_OST_ZFS, FTAG, &os);
2627	if (err != 0)
2628		return (err);
2629
2630	err = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &root_obj);
2631	if (err != 0) {
2632		(void) fprintf(stderr, "can't lookup root znode: %s\n",
2633		    strerror(err));
2634		dmu_objset_disown(os, FTAG);
2635		return (EINVAL);
2636	}
2637
2638	(void) snprintf(curpath, sizeof (curpath), "dataset=%s path=/", ds);
2639
2640	err = dump_path_impl(os, root_obj, path);
2641
2642	close_objset(os, FTAG);
2643	return (err);
2644}
2645
2646static int
2647dump_label(const char *dev)
2648{
2649	int fd;
2650	vdev_label_t label;
2651	char path[MAXPATHLEN];
2652	char *buf = label.vl_vdev_phys.vp_nvlist;
2653	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2654	struct stat64 statbuf;
2655	uint64_t psize, ashift;
2656	boolean_t label_found = B_FALSE;
2657
2658	(void) strlcpy(path, dev, sizeof (path));
2659	if (dev[0] == '/') {
2660		if (strncmp(dev, ZFS_DISK_ROOTD,
2661		    strlen(ZFS_DISK_ROOTD)) == 0) {
2662			(void) snprintf(path, sizeof (path), "%s%s",
2663			    ZFS_RDISK_ROOTD, dev + strlen(ZFS_DISK_ROOTD));
2664		}
2665	} else if (stat64(path, &statbuf) != 0) {
2666		char *s;
2667
2668		(void) snprintf(path, sizeof (path), "%s%s", ZFS_RDISK_ROOTD,
2669		    dev);
2670		if (((s = strrchr(dev, 's')) == NULL &&
2671		    (s = strchr(dev, 'p')) == NULL) ||
2672		    !isdigit(*(s + 1)))
2673			(void) strlcat(path, "s0", sizeof (path));
2674	}
2675
2676	if ((fd = open64(path, O_RDONLY)) < 0) {
2677		(void) fprintf(stderr, "cannot open '%s': %s\n", path,
2678		    strerror(errno));
2679		exit(1);
2680	}
2681
2682	if (fstat64(fd, &statbuf) != 0) {
2683		(void) fprintf(stderr, "failed to stat '%s': %s\n", path,
2684		    strerror(errno));
2685		(void) close(fd);
2686		exit(1);
2687	}
2688
2689	if (S_ISBLK(statbuf.st_mode)) {
2690		(void) fprintf(stderr,
2691		    "cannot use '%s': character device required\n", path);
2692		(void) close(fd);
2693		exit(1);
2694	}
2695
2696	psize = statbuf.st_size;
2697	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2698
2699	for (int l = 0; l < VDEV_LABELS; l++) {
2700		nvlist_t *config = NULL;
2701
2702		if (!dump_opt['q']) {
2703			(void) printf("------------------------------------\n");
2704			(void) printf("LABEL %d\n", l);
2705			(void) printf("------------------------------------\n");
2706		}
2707
2708		if (pread64(fd, &label, sizeof (label),
2709		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2710			if (!dump_opt['q'])
2711				(void) printf("failed to read label %d\n", l);
2712			continue;
2713		}
2714
2715		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2716			if (!dump_opt['q'])
2717				(void) printf("failed to unpack label %d\n", l);
2718			ashift = SPA_MINBLOCKSHIFT;
2719		} else {
2720			nvlist_t *vdev_tree = NULL;
2721
2722			if (!dump_opt['q'])
2723				dump_nvlist(config, 4);
2724			if ((nvlist_lookup_nvlist(config,
2725			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2726			    (nvlist_lookup_uint64(vdev_tree,
2727			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2728				ashift = SPA_MINBLOCKSHIFT;
2729			nvlist_free(config);
2730			label_found = B_TRUE;
2731		}
2732		if (dump_opt['u'])
2733			dump_label_uberblocks(&label, ashift);
2734	}
2735
2736	(void) close(fd);
2737
2738	return (label_found ? 0 : 2);
2739}
2740
2741static uint64_t dataset_feature_count[SPA_FEATURES];
2742static uint64_t remap_deadlist_count = 0;
2743
2744/*ARGSUSED*/
2745static int
2746dump_one_dir(const char *dsname, void *arg)
2747{
2748	int error;
2749	objset_t *os;
2750
2751	error = open_objset(dsname, DMU_OST_ANY, FTAG, &os);
2752	if (error != 0)
2753		return (0);
2754
2755	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
2756		if (!dmu_objset_ds(os)->ds_feature_inuse[f])
2757			continue;
2758		ASSERT(spa_feature_table[f].fi_flags &
2759		    ZFEATURE_FLAG_PER_DATASET);
2760		dataset_feature_count[f]++;
2761	}
2762
2763	if (dsl_dataset_remap_deadlist_exists(dmu_objset_ds(os))) {
2764		remap_deadlist_count++;
2765	}
2766
2767	dump_dir(os);
2768	close_objset(os, FTAG);
2769	fuid_table_destroy();
2770	return (0);
2771}
2772
2773/*
2774 * Block statistics.
2775 */
2776#define	PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2777typedef struct zdb_blkstats {
2778	uint64_t zb_asize;
2779	uint64_t zb_lsize;
2780	uint64_t zb_psize;
2781	uint64_t zb_count;
2782	uint64_t zb_gangs;
2783	uint64_t zb_ditto_samevdev;
2784	uint64_t zb_ditto_same_ms;
2785	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2786} zdb_blkstats_t;
2787
2788/*
2789 * Extended object types to report deferred frees and dedup auto-ditto blocks.
2790 */
2791#define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
2792#define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
2793#define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
2794#define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
2795
2796static const char *zdb_ot_extname[] = {
2797	"deferred free",
2798	"dedup ditto",
2799	"other",
2800	"Total",
2801};
2802
2803#define	ZB_TOTAL	DN_MAX_LEVELS
2804
2805typedef struct zdb_cb {
2806	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2807	uint64_t	zcb_removing_size;
2808	uint64_t	zcb_checkpoint_size;
2809	uint64_t	zcb_dedup_asize;
2810	uint64_t	zcb_dedup_blocks;
2811	uint64_t	zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2812	uint64_t	zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2813	    [BPE_PAYLOAD_SIZE];
2814	uint64_t	zcb_start;
2815	hrtime_t	zcb_lastprint;
2816	uint64_t	zcb_totalasize;
2817	uint64_t	zcb_errors[256];
2818	int		zcb_readfails;
2819	int		zcb_haderrors;
2820	spa_t		*zcb_spa;
2821	uint32_t	**zcb_vd_obsolete_counts;
2822} zdb_cb_t;
2823
2824/* test if two DVA offsets from same vdev are within the same metaslab */
2825static boolean_t
2826same_metaslab(spa_t *spa, uint64_t vdev, uint64_t off1, uint64_t off2)
2827{
2828	vdev_t *vd = vdev_lookup_top(spa, vdev);
2829	uint64_t ms_shift = vd->vdev_ms_shift;
2830
2831	return ((off1 >> ms_shift) == (off2 >> ms_shift));
2832}
2833
2834static void
2835zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2836    dmu_object_type_t type)
2837{
2838	uint64_t refcnt = 0;
2839
2840	ASSERT(type < ZDB_OT_TOTAL);
2841
2842	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2843		return;
2844
2845	spa_config_enter(zcb->zcb_spa, SCL_CONFIG, FTAG, RW_READER);
2846
2847	for (int i = 0; i < 4; i++) {
2848		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2849		int t = (i & 1) ? type : ZDB_OT_TOTAL;
2850		int equal;
2851		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2852
2853		zb->zb_asize += BP_GET_ASIZE(bp);
2854		zb->zb_lsize += BP_GET_LSIZE(bp);
2855		zb->zb_psize += BP_GET_PSIZE(bp);
2856		zb->zb_count++;
2857
2858		/*
2859		 * The histogram is only big enough to record blocks up to
2860		 * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2861		 * "other", bucket.
2862		 */
2863		unsigned idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2864		idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2865		zb->zb_psize_histogram[idx]++;
2866
2867		zb->zb_gangs += BP_COUNT_GANG(bp);
2868
2869		switch (BP_GET_NDVAS(bp)) {
2870		case 2:
2871			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2872			    DVA_GET_VDEV(&bp->blk_dva[1])) {
2873				zb->zb_ditto_samevdev++;
2874
2875				if (same_metaslab(zcb->zcb_spa,
2876				    DVA_GET_VDEV(&bp->blk_dva[0]),
2877				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2878				    DVA_GET_OFFSET(&bp->blk_dva[1])))
2879					zb->zb_ditto_same_ms++;
2880			}
2881			break;
2882		case 3:
2883			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2884			    DVA_GET_VDEV(&bp->blk_dva[1])) +
2885			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2886			    DVA_GET_VDEV(&bp->blk_dva[2])) +
2887			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2888			    DVA_GET_VDEV(&bp->blk_dva[2]));
2889			if (equal != 0) {
2890				zb->zb_ditto_samevdev++;
2891
2892				if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2893				    DVA_GET_VDEV(&bp->blk_dva[1]) &&
2894				    same_metaslab(zcb->zcb_spa,
2895				    DVA_GET_VDEV(&bp->blk_dva[0]),
2896				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2897				    DVA_GET_OFFSET(&bp->blk_dva[1])))
2898					zb->zb_ditto_same_ms++;
2899				else if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2900				    DVA_GET_VDEV(&bp->blk_dva[2]) &&
2901				    same_metaslab(zcb->zcb_spa,
2902				    DVA_GET_VDEV(&bp->blk_dva[0]),
2903				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2904				    DVA_GET_OFFSET(&bp->blk_dva[2])))
2905					zb->zb_ditto_same_ms++;
2906				else if (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2907				    DVA_GET_VDEV(&bp->blk_dva[2]) &&
2908				    same_metaslab(zcb->zcb_spa,
2909				    DVA_GET_VDEV(&bp->blk_dva[1]),
2910				    DVA_GET_OFFSET(&bp->blk_dva[1]),
2911				    DVA_GET_OFFSET(&bp->blk_dva[2])))
2912					zb->zb_ditto_same_ms++;
2913			}
2914			break;
2915		}
2916	}
2917
2918	spa_config_exit(zcb->zcb_spa, SCL_CONFIG, FTAG);
2919
2920	if (BP_IS_EMBEDDED(bp)) {
2921		zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2922		zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2923		    [BPE_GET_PSIZE(bp)]++;
2924		return;
2925	}
2926
2927	if (dump_opt['L'])
2928		return;
2929
2930	if (BP_GET_DEDUP(bp)) {
2931		ddt_t *ddt;
2932		ddt_entry_t *dde;
2933
2934		ddt = ddt_select(zcb->zcb_spa, bp);
2935		ddt_enter(ddt);
2936		dde = ddt_lookup(ddt, bp, B_FALSE);
2937
2938		if (dde == NULL) {
2939			refcnt = 0;
2940		} else {
2941			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2942			ddt_phys_decref(ddp);
2943			refcnt = ddp->ddp_refcnt;
2944			if (ddt_phys_total_refcnt(dde) == 0)
2945				ddt_remove(ddt, dde);
2946		}
2947		ddt_exit(ddt);
2948	}
2949
2950	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2951	    refcnt ? 0 : spa_min_claim_txg(zcb->zcb_spa),
2952	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2953}
2954
2955static void
2956zdb_blkptr_done(zio_t *zio)
2957{
2958	spa_t *spa = zio->io_spa;
2959	blkptr_t *bp = zio->io_bp;
2960	int ioerr = zio->io_error;
2961	zdb_cb_t *zcb = zio->io_private;
2962	zbookmark_phys_t *zb = &zio->io_bookmark;
2963
2964	abd_free(zio->io_abd);
2965
2966	mutex_enter(&spa->spa_scrub_lock);
2967	spa->spa_load_verify_ios--;
2968	cv_broadcast(&spa->spa_scrub_io_cv);
2969
2970	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
2971		char blkbuf[BP_SPRINTF_LEN];
2972
2973		zcb->zcb_haderrors = 1;
2974		zcb->zcb_errors[ioerr]++;
2975
2976		if (dump_opt['b'] >= 2)
2977			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2978		else
2979			blkbuf[0] = '\0';
2980
2981		(void) printf("zdb_blkptr_cb: "
2982		    "Got error %d reading "
2983		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
2984		    ioerr,
2985		    (u_longlong_t)zb->zb_objset,
2986		    (u_longlong_t)zb->zb_object,
2987		    (u_longlong_t)zb->zb_level,
2988		    (u_longlong_t)zb->zb_blkid,
2989		    blkbuf);
2990	}
2991	mutex_exit(&spa->spa_scrub_lock);
2992}
2993
2994static int
2995zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2996    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2997{
2998	zdb_cb_t *zcb = arg;
2999	dmu_object_type_t type;
3000	boolean_t is_metadata;
3001
3002	if (bp == NULL)
3003		return (0);
3004
3005	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
3006		char blkbuf[BP_SPRINTF_LEN];
3007		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3008		(void) printf("objset %llu object %llu "
3009		    "level %lld offset 0x%llx %s\n",
3010		    (u_longlong_t)zb->zb_objset,
3011		    (u_longlong_t)zb->zb_object,
3012		    (longlong_t)zb->zb_level,
3013		    (u_longlong_t)blkid2offset(dnp, bp, zb),
3014		    blkbuf);
3015	}
3016
3017	if (BP_IS_HOLE(bp))
3018		return (0);
3019
3020	type = BP_GET_TYPE(bp);
3021
3022	zdb_count_block(zcb, zilog, bp,
3023	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
3024
3025	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
3026
3027	if (!BP_IS_EMBEDDED(bp) &&
3028	    (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
3029		size_t size = BP_GET_PSIZE(bp);
3030		abd_t *abd = abd_alloc(size, B_FALSE);
3031		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
3032
3033		/* If it's an intent log block, failure is expected. */
3034		if (zb->zb_level == ZB_ZIL_LEVEL)
3035			flags |= ZIO_FLAG_SPECULATIVE;
3036
3037		mutex_enter(&spa->spa_scrub_lock);
3038		while (spa->spa_load_verify_ios > max_inflight)
3039			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
3040		spa->spa_load_verify_ios++;
3041		mutex_exit(&spa->spa_scrub_lock);
3042
3043		zio_nowait(zio_read(NULL, spa, bp, abd, size,
3044		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
3045	}
3046
3047	zcb->zcb_readfails = 0;
3048
3049	/* only call gethrtime() every 100 blocks */
3050	static int iters;
3051	if (++iters > 100)
3052		iters = 0;
3053	else
3054		return (0);
3055
3056	if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
3057		uint64_t now = gethrtime();
3058		char buf[10];
3059		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
3060		int kb_per_sec =
3061		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
3062		int sec_remaining =
3063		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
3064
3065		/* make sure nicenum has enough space */
3066		CTASSERT(sizeof (buf) >= NN_NUMBUF_SZ);
3067
3068		zfs_nicenum(bytes, buf, sizeof (buf));
3069		(void) fprintf(stderr,
3070		    "\r%5s completed (%4dMB/s) "
3071		    "estimated time remaining: %uhr %02umin %02usec        ",
3072		    buf, kb_per_sec / 1024,
3073		    sec_remaining / 60 / 60,
3074		    sec_remaining / 60 % 60,
3075		    sec_remaining % 60);
3076
3077		zcb->zcb_lastprint = now;
3078	}
3079
3080	return (0);
3081}
3082
3083static void
3084zdb_leak(void *arg, uint64_t start, uint64_t size)
3085{
3086	vdev_t *vd = arg;
3087
3088	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
3089	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
3090}
3091
3092static metaslab_ops_t zdb_metaslab_ops = {
3093	NULL	/* alloc */
3094};
3095
3096static void
3097zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
3098{
3099	ddt_bookmark_t ddb;
3100	ddt_entry_t dde;
3101	int error;
3102
3103	ASSERT(!dump_opt['L']);
3104
3105	bzero(&ddb, sizeof (ddb));
3106	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
3107		blkptr_t blk;
3108		ddt_phys_t *ddp = dde.dde_phys;
3109
3110		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
3111			return;
3112
3113		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
3114
3115		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
3116			if (ddp->ddp_phys_birth == 0)
3117				continue;
3118			ddt_bp_create(ddb.ddb_checksum,
3119			    &dde.dde_key, ddp, &blk);
3120			if (p == DDT_PHYS_DITTO) {
3121				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
3122			} else {
3123				zcb->zcb_dedup_asize +=
3124				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
3125				zcb->zcb_dedup_blocks++;
3126			}
3127		}
3128		ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
3129		ddt_enter(ddt);
3130		VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
3131		ddt_exit(ddt);
3132	}
3133
3134	ASSERT(error == ENOENT);
3135}
3136
3137/* ARGSUSED */
3138static void
3139claim_segment_impl_cb(uint64_t inner_offset, vdev_t *vd, uint64_t offset,
3140    uint64_t size, void *arg)
3141{
3142	/*
3143	 * This callback was called through a remap from
3144	 * a device being removed. Therefore, the vdev that
3145	 * this callback is applied to is a concrete
3146	 * vdev.
3147	 */
3148	ASSERT(vdev_is_concrete(vd));
3149
3150	VERIFY0(metaslab_claim_impl(vd, offset, size,
3151	    spa_min_claim_txg(vd->vdev_spa)));
3152}
3153
3154static void
3155claim_segment_cb(void *arg, uint64_t offset, uint64_t size)
3156{
3157	vdev_t *vd = arg;
3158
3159	vdev_indirect_ops.vdev_op_remap(vd, offset, size,
3160	    claim_segment_impl_cb, NULL);
3161}
3162
3163/*
3164 * After accounting for all allocated blocks that are directly referenced,
3165 * we might have missed a reference to a block from a partially complete
3166 * (and thus unused) indirect mapping object. We perform a secondary pass
3167 * through the metaslabs we have already mapped and claim the destination
3168 * blocks.
3169 */
3170static void
3171zdb_claim_removing(spa_t *spa, zdb_cb_t *zcb)
3172{
3173	if (dump_opt['L'])
3174		return;
3175
3176	if (spa->spa_vdev_removal == NULL)
3177		return;
3178
3179	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3180
3181	spa_vdev_removal_t *svr = spa->spa_vdev_removal;
3182	vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id);
3183	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3184
3185	for (uint64_t msi = 0; msi < vd->vdev_ms_count; msi++) {
3186		metaslab_t *msp = vd->vdev_ms[msi];
3187
3188		if (msp->ms_start >= vdev_indirect_mapping_max_offset(vim))
3189			break;
3190
3191		ASSERT0(range_tree_space(svr->svr_allocd_segs));
3192
3193		if (msp->ms_sm != NULL) {
3194			VERIFY0(space_map_load(msp->ms_sm,
3195			    svr->svr_allocd_segs, SM_ALLOC));
3196
3197			/*
3198			 * Clear everything past what has been synced unless
3199			 * it's past the spacemap, because we have not allocated
3200			 * mappings for it yet.
3201			 */
3202			uint64_t vim_max_offset =
3203			    vdev_indirect_mapping_max_offset(vim);
3204			uint64_t sm_end = msp->ms_sm->sm_start +
3205			    msp->ms_sm->sm_size;
3206			if (sm_end > vim_max_offset)
3207				range_tree_clear(svr->svr_allocd_segs,
3208				    vim_max_offset, sm_end - vim_max_offset);
3209		}
3210
3211		zcb->zcb_removing_size +=
3212		    range_tree_space(svr->svr_allocd_segs);
3213		range_tree_vacate(svr->svr_allocd_segs, claim_segment_cb, vd);
3214	}
3215
3216	spa_config_exit(spa, SCL_CONFIG, FTAG);
3217}
3218
3219/* ARGSUSED */
3220static int
3221increment_indirect_mapping_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3222{
3223	zdb_cb_t *zcb = arg;
3224	spa_t *spa = zcb->zcb_spa;
3225	vdev_t *vd;
3226	const dva_t *dva = &bp->blk_dva[0];
3227
3228	ASSERT(!dump_opt['L']);
3229	ASSERT3U(BP_GET_NDVAS(bp), ==, 1);
3230
3231	spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
3232	vd = vdev_lookup_top(zcb->zcb_spa, DVA_GET_VDEV(dva));
3233	ASSERT3P(vd, !=, NULL);
3234	spa_config_exit(spa, SCL_VDEV, FTAG);
3235
3236	ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0);
3237	ASSERT3P(zcb->zcb_vd_obsolete_counts[vd->vdev_id], !=, NULL);
3238
3239	vdev_indirect_mapping_increment_obsolete_count(
3240	    vd->vdev_indirect_mapping,
3241	    DVA_GET_OFFSET(dva), DVA_GET_ASIZE(dva),
3242	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3243
3244	return (0);
3245}
3246
3247static uint32_t *
3248zdb_load_obsolete_counts(vdev_t *vd)
3249{
3250	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3251	spa_t *spa = vd->vdev_spa;
3252	spa_condensing_indirect_phys_t *scip =
3253	    &spa->spa_condensing_indirect_phys;
3254	uint32_t *counts;
3255
3256	EQUIV(vdev_obsolete_sm_object(vd) != 0, vd->vdev_obsolete_sm != NULL);
3257	counts = vdev_indirect_mapping_load_obsolete_counts(vim);
3258	if (vd->vdev_obsolete_sm != NULL) {
3259		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3260		    vd->vdev_obsolete_sm);
3261	}
3262	if (scip->scip_vdev == vd->vdev_id &&
3263	    scip->scip_prev_obsolete_sm_object != 0) {
3264		space_map_t *prev_obsolete_sm = NULL;
3265		VERIFY0(space_map_open(&prev_obsolete_sm, spa->spa_meta_objset,
3266		    scip->scip_prev_obsolete_sm_object, 0, vd->vdev_asize, 0));
3267		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3268		    prev_obsolete_sm);
3269		space_map_close(prev_obsolete_sm);
3270	}
3271	return (counts);
3272}
3273
3274typedef struct checkpoint_sm_exclude_entry_arg {
3275	vdev_t *cseea_vd;
3276	uint64_t cseea_checkpoint_size;
3277} checkpoint_sm_exclude_entry_arg_t;
3278
3279static int
3280checkpoint_sm_exclude_entry_cb(space_map_entry_t *sme, void *arg)
3281{
3282	checkpoint_sm_exclude_entry_arg_t *cseea = arg;
3283	vdev_t *vd = cseea->cseea_vd;
3284	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
3285	uint64_t end = sme->sme_offset + sme->sme_run;
3286
3287	ASSERT(sme->sme_type == SM_FREE);
3288
3289	/*
3290	 * Since the vdev_checkpoint_sm exists in the vdev level
3291	 * and the ms_sm space maps exist in the metaslab level,
3292	 * an entry in the checkpoint space map could theoretically
3293	 * cross the boundaries of the metaslab that it belongs.
3294	 *
3295	 * In reality, because of the way that we populate and
3296	 * manipulate the checkpoint's space maps currently,
3297	 * there shouldn't be any entries that cross metaslabs.
3298	 * Hence the assertion below.
3299	 *
3300	 * That said, there is no fundamental requirement that
3301	 * the checkpoint's space map entries should not cross
3302	 * metaslab boundaries. So if needed we could add code
3303	 * that handles metaslab-crossing segments in the future.
3304	 */
3305	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
3306	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
3307
3308	/*
3309	 * By removing the entry from the allocated segments we
3310	 * also verify that the entry is there to begin with.
3311	 */
3312	mutex_enter(&ms->ms_lock);
3313	range_tree_remove(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
3314	mutex_exit(&ms->ms_lock);
3315
3316	cseea->cseea_checkpoint_size += sme->sme_run;
3317	return (0);
3318}
3319
3320static void
3321zdb_leak_init_vdev_exclude_checkpoint(vdev_t *vd, zdb_cb_t *zcb)
3322{
3323	spa_t *spa = vd->vdev_spa;
3324	space_map_t *checkpoint_sm = NULL;
3325	uint64_t checkpoint_sm_obj;
3326
3327	/*
3328	 * If there is no vdev_top_zap, we are in a pool whose
3329	 * version predates the pool checkpoint feature.
3330	 */
3331	if (vd->vdev_top_zap == 0)
3332		return;
3333
3334	/*
3335	 * If there is no reference of the vdev_checkpoint_sm in
3336	 * the vdev_top_zap, then one of the following scenarios
3337	 * is true:
3338	 *
3339	 * 1] There is no checkpoint
3340	 * 2] There is a checkpoint, but no checkpointed blocks
3341	 *    have been freed yet
3342	 * 3] The current vdev is indirect
3343	 *
3344	 * In these cases we return immediately.
3345	 */
3346	if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
3347	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
3348		return;
3349
3350	VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
3351	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1,
3352	    &checkpoint_sm_obj));
3353
3354	checkpoint_sm_exclude_entry_arg_t cseea;
3355	cseea.cseea_vd = vd;
3356	cseea.cseea_checkpoint_size = 0;
3357
3358	VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
3359	    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
3360
3361	VERIFY0(space_map_iterate(checkpoint_sm,
3362	    space_map_length(checkpoint_sm),
3363	    checkpoint_sm_exclude_entry_cb, &cseea));
3364	space_map_close(checkpoint_sm);
3365
3366	zcb->zcb_checkpoint_size += cseea.cseea_checkpoint_size;
3367}
3368
3369static void
3370zdb_leak_init_exclude_checkpoint(spa_t *spa, zdb_cb_t *zcb)
3371{
3372	ASSERT(!dump_opt['L']);
3373
3374	vdev_t *rvd = spa->spa_root_vdev;
3375	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3376		ASSERT3U(c, ==, rvd->vdev_child[c]->vdev_id);
3377		zdb_leak_init_vdev_exclude_checkpoint(rvd->vdev_child[c], zcb);
3378	}
3379}
3380
3381static void
3382load_concrete_ms_allocatable_trees(spa_t *spa, maptype_t maptype)
3383{
3384	vdev_t *rvd = spa->spa_root_vdev;
3385	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
3386		vdev_t *vd = rvd->vdev_child[i];
3387
3388		ASSERT3U(i, ==, vd->vdev_id);
3389
3390		if (vd->vdev_ops == &vdev_indirect_ops)
3391			continue;
3392
3393		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3394			metaslab_t *msp = vd->vdev_ms[m];
3395
3396			(void) fprintf(stderr,
3397			    "\rloading concrete vdev %llu, "
3398			    "metaslab %llu of %llu ...",
3399			    (longlong_t)vd->vdev_id,
3400			    (longlong_t)msp->ms_id,
3401			    (longlong_t)vd->vdev_ms_count);
3402
3403			mutex_enter(&msp->ms_lock);
3404			metaslab_unload(msp);
3405
3406			/*
3407			 * We don't want to spend the CPU manipulating the
3408			 * size-ordered tree, so clear the range_tree ops.
3409			 */
3410			msp->ms_allocatable->rt_ops = NULL;
3411
3412			if (msp->ms_sm != NULL) {
3413				VERIFY0(space_map_load(msp->ms_sm,
3414				    msp->ms_allocatable, maptype));
3415			}
3416			if (!msp->ms_loaded)
3417				msp->ms_loaded = B_TRUE;
3418			mutex_exit(&msp->ms_lock);
3419		}
3420	}
3421}
3422
3423/*
3424 * vm_idxp is an in-out parameter which (for indirect vdevs) is the
3425 * index in vim_entries that has the first entry in this metaslab.
3426 * On return, it will be set to the first entry after this metaslab.
3427 */
3428static void
3429load_indirect_ms_allocatable_tree(vdev_t *vd, metaslab_t *msp,
3430    uint64_t *vim_idxp)
3431{
3432	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3433
3434	mutex_enter(&msp->ms_lock);
3435	metaslab_unload(msp);
3436
3437	/*
3438	 * We don't want to spend the CPU manipulating the
3439	 * size-ordered tree, so clear the range_tree ops.
3440	 */
3441	msp->ms_allocatable->rt_ops = NULL;
3442
3443	for (; *vim_idxp < vdev_indirect_mapping_num_entries(vim);
3444	    (*vim_idxp)++) {
3445		vdev_indirect_mapping_entry_phys_t *vimep =
3446		    &vim->vim_entries[*vim_idxp];
3447		uint64_t ent_offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3448		uint64_t ent_len = DVA_GET_ASIZE(&vimep->vimep_dst);
3449		ASSERT3U(ent_offset, >=, msp->ms_start);
3450		if (ent_offset >= msp->ms_start + msp->ms_size)
3451			break;
3452
3453		/*
3454		 * Mappings do not cross metaslab boundaries,
3455		 * because we create them by walking the metaslabs.
3456		 */
3457		ASSERT3U(ent_offset + ent_len, <=,
3458		    msp->ms_start + msp->ms_size);
3459		range_tree_add(msp->ms_allocatable, ent_offset, ent_len);
3460	}
3461
3462	if (!msp->ms_loaded)
3463		msp->ms_loaded = B_TRUE;
3464	mutex_exit(&msp->ms_lock);
3465}
3466
3467static void
3468zdb_leak_init_prepare_indirect_vdevs(spa_t *spa, zdb_cb_t *zcb)
3469{
3470	ASSERT(!dump_opt['L']);
3471
3472	vdev_t *rvd = spa->spa_root_vdev;
3473	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3474		vdev_t *vd = rvd->vdev_child[c];
3475
3476		ASSERT3U(c, ==, vd->vdev_id);
3477
3478		if (vd->vdev_ops != &vdev_indirect_ops)
3479			continue;
3480
3481		/*
3482		 * Note: we don't check for mapping leaks on
3483		 * removing vdevs because their ms_allocatable's
3484		 * are used to look for leaks in allocated space.
3485		 */
3486		zcb->zcb_vd_obsolete_counts[c] = zdb_load_obsolete_counts(vd);
3487
3488		/*
3489		 * Normally, indirect vdevs don't have any
3490		 * metaslabs.  We want to set them up for
3491		 * zio_claim().
3492		 */
3493		VERIFY0(vdev_metaslab_init(vd, 0));
3494
3495		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3496		uint64_t vim_idx = 0;
3497		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3498
3499			(void) fprintf(stderr,
3500			    "\rloading indirect vdev %llu, "
3501			    "metaslab %llu of %llu ...",
3502			    (longlong_t)vd->vdev_id,
3503			    (longlong_t)vd->vdev_ms[m]->ms_id,
3504			    (longlong_t)vd->vdev_ms_count);
3505
3506			load_indirect_ms_allocatable_tree(vd, vd->vdev_ms[m],
3507			    &vim_idx);
3508		}
3509		ASSERT3U(vim_idx, ==, vdev_indirect_mapping_num_entries(vim));
3510	}
3511}
3512
3513static void
3514zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
3515{
3516	zcb->zcb_spa = spa;
3517
3518	if (dump_opt['L'])
3519		return;
3520
3521	dsl_pool_t *dp = spa->spa_dsl_pool;
3522	vdev_t *rvd = spa->spa_root_vdev;
3523
3524	/*
3525	 * We are going to be changing the meaning of the metaslab's
3526	 * ms_allocatable.  Ensure that the allocator doesn't try to
3527	 * use the tree.
3528	 */
3529	spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
3530	spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
3531
3532	zcb->zcb_vd_obsolete_counts =
3533	    umem_zalloc(rvd->vdev_children * sizeof (uint32_t *),
3534	    UMEM_NOFAIL);
3535
3536	/*
3537	 * For leak detection, we overload the ms_allocatable trees
3538	 * to contain allocated segments instead of free segments.
3539	 * As a result, we can't use the normal metaslab_load/unload
3540	 * interfaces.
3541	 */
3542	zdb_leak_init_prepare_indirect_vdevs(spa, zcb);
3543	load_concrete_ms_allocatable_trees(spa, SM_ALLOC);
3544
3545	/*
3546	 * On load_concrete_ms_allocatable_trees() we loaded all the
3547	 * allocated entries from the ms_sm to the ms_allocatable for
3548	 * each metaslab. If the pool has a checkpoint or is in the
3549	 * middle of discarding a checkpoint, some of these blocks
3550	 * may have been freed but their ms_sm may not have been
3551	 * updated because they are referenced by the checkpoint. In
3552	 * order to avoid false-positives during leak-detection, we
3553	 * go through the vdev's checkpoint space map and exclude all
3554	 * its entries from their relevant ms_allocatable.
3555	 *
3556	 * We also aggregate the space held by the checkpoint and add
3557	 * it to zcb_checkpoint_size.
3558	 *
3559	 * Note that at this point we are also verifying that all the
3560	 * entries on the checkpoint_sm are marked as allocated in
3561	 * the ms_sm of their relevant metaslab.
3562	 * [see comment in checkpoint_sm_exclude_entry_cb()]
3563	 */
3564	zdb_leak_init_exclude_checkpoint(spa, zcb);
3565	ASSERT3U(zcb->zcb_checkpoint_size, ==, spa_get_checkpoint_space(spa));
3566
3567	/* for cleaner progress output */
3568	(void) fprintf(stderr, "\n");
3569
3570	if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
3571		ASSERT(spa_feature_is_enabled(spa,
3572		    SPA_FEATURE_DEVICE_REMOVAL));
3573		(void) bpobj_iterate_nofree(&dp->dp_obsolete_bpobj,
3574		    increment_indirect_mapping_cb, zcb, NULL);
3575	}
3576
3577	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3578	zdb_ddt_leak_init(spa, zcb);
3579	spa_config_exit(spa, SCL_CONFIG, FTAG);
3580}
3581
3582static boolean_t
3583zdb_check_for_obsolete_leaks(vdev_t *vd, zdb_cb_t *zcb)
3584{
3585	boolean_t leaks = B_FALSE;
3586	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3587	uint64_t total_leaked = 0;
3588
3589	ASSERT(vim != NULL);
3590
3591	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
3592		vdev_indirect_mapping_entry_phys_t *vimep =
3593		    &vim->vim_entries[i];
3594		uint64_t obsolete_bytes = 0;
3595		uint64_t offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3596		metaslab_t *msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
3597
3598		/*
3599		 * This is not very efficient but it's easy to
3600		 * verify correctness.
3601		 */
3602		for (uint64_t inner_offset = 0;
3603		    inner_offset < DVA_GET_ASIZE(&vimep->vimep_dst);
3604		    inner_offset += 1 << vd->vdev_ashift) {
3605			if (range_tree_contains(msp->ms_allocatable,
3606			    offset + inner_offset, 1 << vd->vdev_ashift)) {
3607				obsolete_bytes += 1 << vd->vdev_ashift;
3608			}
3609		}
3610
3611		int64_t bytes_leaked = obsolete_bytes -
3612		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i];
3613		ASSERT3U(DVA_GET_ASIZE(&vimep->vimep_dst), >=,
3614		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i]);
3615		if (bytes_leaked != 0 &&
3616		    (vdev_obsolete_counts_are_precise(vd) ||
3617		    dump_opt['d'] >= 5)) {
3618			(void) printf("obsolete indirect mapping count "
3619			    "mismatch on %llu:%llx:%llx : %llx bytes leaked\n",
3620			    (u_longlong_t)vd->vdev_id,
3621			    (u_longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
3622			    (u_longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
3623			    (u_longlong_t)bytes_leaked);
3624		}
3625		total_leaked += ABS(bytes_leaked);
3626	}
3627
3628	if (!vdev_obsolete_counts_are_precise(vd) && total_leaked > 0) {
3629		int pct_leaked = total_leaked * 100 /
3630		    vdev_indirect_mapping_bytes_mapped(vim);
3631		(void) printf("cannot verify obsolete indirect mapping "
3632		    "counts of vdev %llu because precise feature was not "
3633		    "enabled when it was removed: %d%% (%llx bytes) of mapping"
3634		    "unreferenced\n",
3635		    (u_longlong_t)vd->vdev_id, pct_leaked,
3636		    (u_longlong_t)total_leaked);
3637	} else if (total_leaked > 0) {
3638		(void) printf("obsolete indirect mapping count mismatch "
3639		    "for vdev %llu -- %llx total bytes mismatched\n",
3640		    (u_longlong_t)vd->vdev_id,
3641		    (u_longlong_t)total_leaked);
3642		leaks |= B_TRUE;
3643	}
3644
3645	vdev_indirect_mapping_free_obsolete_counts(vim,
3646	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3647	zcb->zcb_vd_obsolete_counts[vd->vdev_id] = NULL;
3648
3649	return (leaks);
3650}
3651
3652static boolean_t
3653zdb_leak_fini(spa_t *spa, zdb_cb_t *zcb)
3654{
3655	if (dump_opt['L'])
3656		return (B_FALSE);
3657
3658	boolean_t leaks = B_FALSE;
3659
3660	vdev_t *rvd = spa->spa_root_vdev;
3661	for (unsigned c = 0; c < rvd->vdev_children; c++) {
3662		vdev_t *vd = rvd->vdev_child[c];
3663#if DEBUG
3664		metaslab_group_t *mg = vd->vdev_mg;
3665#endif
3666
3667		if (zcb->zcb_vd_obsolete_counts[c] != NULL) {
3668			leaks |= zdb_check_for_obsolete_leaks(vd, zcb);
3669		}
3670
3671		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3672			metaslab_t *msp = vd->vdev_ms[m];
3673			ASSERT3P(mg, ==, msp->ms_group);
3674
3675			/*
3676			 * ms_allocatable has been overloaded
3677			 * to contain allocated segments. Now that
3678			 * we finished traversing all blocks, any
3679			 * block that remains in the ms_allocatable
3680			 * represents an allocated block that we
3681			 * did not claim during the traversal.
3682			 * Claimed blocks would have been removed
3683			 * from the ms_allocatable.  For indirect
3684			 * vdevs, space remaining in the tree
3685			 * represents parts of the mapping that are
3686			 * not referenced, which is not a bug.
3687			 */
3688			if (vd->vdev_ops == &vdev_indirect_ops) {
3689				range_tree_vacate(msp->ms_allocatable,
3690				    NULL, NULL);
3691			} else {
3692				range_tree_vacate(msp->ms_allocatable,
3693				    zdb_leak, vd);
3694			}
3695
3696			if (msp->ms_loaded) {
3697				msp->ms_loaded = B_FALSE;
3698			}
3699		}
3700
3701	}
3702
3703	umem_free(zcb->zcb_vd_obsolete_counts,
3704	    rvd->vdev_children * sizeof (uint32_t *));
3705	zcb->zcb_vd_obsolete_counts = NULL;
3706
3707	return (leaks);
3708}
3709
3710/* ARGSUSED */
3711static int
3712count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3713{
3714	zdb_cb_t *zcb = arg;
3715
3716	if (dump_opt['b'] >= 5) {
3717		char blkbuf[BP_SPRINTF_LEN];
3718		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3719		(void) printf("[%s] %s\n",
3720		    "deferred free", blkbuf);
3721	}
3722	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
3723	return (0);
3724}
3725
3726static int
3727dump_block_stats(spa_t *spa)
3728{
3729	zdb_cb_t zcb;
3730	zdb_blkstats_t *zb, *tzb;
3731	uint64_t norm_alloc, norm_space, total_alloc, total_found;
3732	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
3733	boolean_t leaks = B_FALSE;
3734	int err;
3735
3736	bzero(&zcb, sizeof (zcb));
3737	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
3738	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
3739	    (dump_opt['c'] == 1) ? "metadata " : "",
3740	    dump_opt['c'] ? "checksums " : "",
3741	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
3742	    !dump_opt['L'] ? "nothing leaked " : "");
3743
3744	/*
3745	 * When leak detection is enabled we load all space maps as SM_ALLOC
3746	 * maps, then traverse the pool claiming each block we discover. If
3747	 * the pool is perfectly consistent, the segment trees will be empty
3748	 * when we're done. Anything left over is a leak; any block we can't
3749	 * claim (because it's not part of any space map) is a double
3750	 * allocation, reference to a freed block, or an unclaimed log block.
3751	 *
3752	 * When leak detection is disabled (-L option) we still traverse the
3753	 * pool claiming each block we discover, but we skip opening any space
3754	 * maps.
3755	 */
3756	bzero(&zcb, sizeof (zdb_cb_t));
3757	zdb_leak_init(spa, &zcb);
3758
3759	/*
3760	 * If there's a deferred-free bplist, process that first.
3761	 */
3762	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
3763	    count_block_cb, &zcb, NULL);
3764
3765	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
3766		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
3767		    count_block_cb, &zcb, NULL);
3768	}
3769
3770	zdb_claim_removing(spa, &zcb);
3771
3772	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
3773		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
3774		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
3775		    &zcb, NULL));
3776	}
3777
3778	if (dump_opt['c'] > 1)
3779		flags |= TRAVERSE_PREFETCH_DATA;
3780
3781	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
3782	zcb.zcb_totalasize += metaslab_class_get_alloc(spa_special_class(spa));
3783	zcb.zcb_totalasize += metaslab_class_get_alloc(spa_dedup_class(spa));
3784	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
3785	err = traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
3786
3787	/*
3788	 * If we've traversed the data blocks then we need to wait for those
3789	 * I/Os to complete. We leverage "The Godfather" zio to wait on
3790	 * all async I/Os to complete.
3791	 */
3792	if (dump_opt['c']) {
3793		for (int i = 0; i < max_ncpus; i++) {
3794			(void) zio_wait(spa->spa_async_zio_root[i]);
3795			spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
3796			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
3797			    ZIO_FLAG_GODFATHER);
3798		}
3799	}
3800
3801	/*
3802	 * Done after zio_wait() since zcb_haderrors is modified in
3803	 * zdb_blkptr_done()
3804	 */
3805	zcb.zcb_haderrors |= err;
3806
3807	if (zcb.zcb_haderrors) {
3808		(void) printf("\nError counts:\n\n");
3809		(void) printf("\t%5s  %s\n", "errno", "count");
3810		for (int e = 0; e < 256; e++) {
3811			if (zcb.zcb_errors[e] != 0) {
3812				(void) printf("\t%5d  %llu\n",
3813				    e, (u_longlong_t)zcb.zcb_errors[e]);
3814			}
3815		}
3816	}
3817
3818	/*
3819	 * Report any leaked segments.
3820	 */
3821	leaks |= zdb_leak_fini(spa, &zcb);
3822
3823	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
3824
3825	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
3826	norm_space = metaslab_class_get_space(spa_normal_class(spa));
3827
3828	total_alloc = norm_alloc +
3829	    metaslab_class_get_alloc(spa_log_class(spa)) +
3830	    metaslab_class_get_alloc(spa_special_class(spa)) +
3831	    metaslab_class_get_alloc(spa_dedup_class(spa));
3832	total_found = tzb->zb_asize - zcb.zcb_dedup_asize +
3833	    zcb.zcb_removing_size + zcb.zcb_checkpoint_size;
3834
3835	if (total_found == total_alloc && !dump_opt['L']) {
3836		(void) printf("\n\tNo leaks (block sum matches space"
3837		    " maps exactly)\n");
3838	} else if (!dump_opt['L']) {
3839		(void) printf("block traversal size %llu != alloc %llu "
3840		    "(%s %lld)\n",
3841		    (u_longlong_t)total_found,
3842		    (u_longlong_t)total_alloc,
3843		    (dump_opt['L']) ? "unreachable" : "leaked",
3844		    (longlong_t)(total_alloc - total_found));
3845		leaks = B_TRUE;
3846	}
3847
3848	if (tzb->zb_count == 0)
3849		return (2);
3850
3851	(void) printf("\n");
3852	(void) printf("\t%-16s %14llu\n", "bp count:",
3853	    (u_longlong_t)tzb->zb_count);
3854	(void) printf("\t%-16s %14llu\n", "ganged count:",
3855	    (longlong_t)tzb->zb_gangs);
3856	(void) printf("\t%-16s %14llu      avg: %6llu\n", "bp logical:",
3857	    (u_longlong_t)tzb->zb_lsize,
3858	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
3859	(void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
3860	    "bp physical:", (u_longlong_t)tzb->zb_psize,
3861	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
3862	    (double)tzb->zb_lsize / tzb->zb_psize);
3863	(void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
3864	    "bp allocated:", (u_longlong_t)tzb->zb_asize,
3865	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
3866	    (double)tzb->zb_lsize / tzb->zb_asize);
3867	(void) printf("\t%-16s %14llu    ref>1: %6llu   deduplication: %6.2f\n",
3868	    "bp deduped:", (u_longlong_t)zcb.zcb_dedup_asize,
3869	    (u_longlong_t)zcb.zcb_dedup_blocks,
3870	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
3871	(void) printf("\t%-16s %14llu     used: %5.2f%%\n", "Normal class:",
3872	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
3873
3874	if (spa_special_class(spa)->mc_rotor != NULL) {
3875		uint64_t alloc = metaslab_class_get_alloc(
3876		    spa_special_class(spa));
3877		uint64_t space = metaslab_class_get_space(
3878		    spa_special_class(spa));
3879
3880		(void) printf("\t%-16s %14llu     used: %5.2f%%\n",
3881		    "Special class", (u_longlong_t)alloc,
3882		    100.0 * alloc / space);
3883	}
3884
3885	if (spa_dedup_class(spa)->mc_rotor != NULL) {
3886		uint64_t alloc = metaslab_class_get_alloc(
3887		    spa_dedup_class(spa));
3888		uint64_t space = metaslab_class_get_space(
3889		    spa_dedup_class(spa));
3890
3891		(void) printf("\t%-16s %14llu     used: %5.2f%%\n",
3892		    "Dedup class", (u_longlong_t)alloc,
3893		    100.0 * alloc / space);
3894	}
3895
3896	for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
3897		if (zcb.zcb_embedded_blocks[i] == 0)
3898			continue;
3899		(void) printf("\n");
3900		(void) printf("\tadditional, non-pointer bps of type %u: "
3901		    "%10llu\n",
3902		    i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
3903
3904		if (dump_opt['b'] >= 3) {
3905			(void) printf("\t number of (compressed) bytes:  "
3906			    "number of bps\n");
3907			dump_histogram(zcb.zcb_embedded_histogram[i],
3908			    sizeof (zcb.zcb_embedded_histogram[i]) /
3909			    sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
3910		}
3911	}
3912
3913	if (tzb->zb_ditto_samevdev != 0) {
3914		(void) printf("\tDittoed blocks on same vdev: %llu\n",
3915		    (longlong_t)tzb->zb_ditto_samevdev);
3916	}
3917	if (tzb->zb_ditto_same_ms != 0) {
3918		(void) printf("\tDittoed blocks in same metaslab: %llu\n",
3919		    (longlong_t)tzb->zb_ditto_same_ms);
3920	}
3921
3922	for (uint64_t v = 0; v < spa->spa_root_vdev->vdev_children; v++) {
3923		vdev_t *vd = spa->spa_root_vdev->vdev_child[v];
3924		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3925
3926		if (vim == NULL) {
3927			continue;
3928		}
3929
3930		char mem[32];
3931		zdb_nicenum(vdev_indirect_mapping_num_entries(vim),
3932		    mem, vdev_indirect_mapping_size(vim));
3933
3934		(void) printf("\tindirect vdev id %llu has %llu segments "
3935		    "(%s in memory)\n",
3936		    (longlong_t)vd->vdev_id,
3937		    (longlong_t)vdev_indirect_mapping_num_entries(vim), mem);
3938	}
3939
3940	if (dump_opt['b'] >= 2) {
3941		int l, t, level;
3942		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
3943		    "\t  avg\t comp\t%%Total\tType\n");
3944
3945		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
3946			char csize[32], lsize[32], psize[32], asize[32];
3947			char avg[32], gang[32];
3948			const char *typename;
3949
3950			/* make sure nicenum has enough space */
3951			CTASSERT(sizeof (csize) >= NN_NUMBUF_SZ);
3952			CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
3953			CTASSERT(sizeof (psize) >= NN_NUMBUF_SZ);
3954			CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
3955			CTASSERT(sizeof (avg) >= NN_NUMBUF_SZ);
3956			CTASSERT(sizeof (gang) >= NN_NUMBUF_SZ);
3957
3958			if (t < DMU_OT_NUMTYPES)
3959				typename = dmu_ot[t].ot_name;
3960			else
3961				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
3962
3963			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
3964				(void) printf("%6s\t%5s\t%5s\t%5s"
3965				    "\t%5s\t%5s\t%6s\t%s\n",
3966				    "-",
3967				    "-",
3968				    "-",
3969				    "-",
3970				    "-",
3971				    "-",
3972				    "-",
3973				    typename);
3974				continue;
3975			}
3976
3977			for (l = ZB_TOTAL - 1; l >= -1; l--) {
3978				level = (l == -1 ? ZB_TOTAL : l);
3979				zb = &zcb.zcb_type[level][t];
3980
3981				if (zb->zb_asize == 0)
3982					continue;
3983
3984				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
3985					continue;
3986
3987				if (level == 0 && zb->zb_asize ==
3988				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
3989					continue;
3990
3991				zdb_nicenum(zb->zb_count, csize,
3992				    sizeof (csize));
3993				zdb_nicenum(zb->zb_lsize, lsize,
3994				    sizeof (lsize));
3995				zdb_nicenum(zb->zb_psize, psize,
3996				    sizeof (psize));
3997				zdb_nicenum(zb->zb_asize, asize,
3998				    sizeof (asize));
3999				zdb_nicenum(zb->zb_asize / zb->zb_count, avg,
4000				    sizeof (avg));
4001				zdb_nicenum(zb->zb_gangs, gang, sizeof (gang));
4002
4003				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
4004				    "\t%5.2f\t%6.2f\t",
4005				    csize, lsize, psize, asize, avg,
4006				    (double)zb->zb_lsize / zb->zb_psize,
4007				    100.0 * zb->zb_asize / tzb->zb_asize);
4008
4009				if (level == ZB_TOTAL)
4010					(void) printf("%s\n", typename);
4011				else
4012					(void) printf("    L%d %s\n",
4013					    level, typename);
4014
4015				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
4016					(void) printf("\t number of ganged "
4017					    "blocks: %s\n", gang);
4018				}
4019
4020				if (dump_opt['b'] >= 4) {
4021					(void) printf("psize "
4022					    "(in 512-byte sectors): "
4023					    "number of blocks\n");
4024					dump_histogram(zb->zb_psize_histogram,
4025					    PSIZE_HISTO_SIZE, 0);
4026				}
4027			}
4028		}
4029	}
4030
4031	(void) printf("\n");
4032
4033	if (leaks)
4034		return (2);
4035
4036	if (zcb.zcb_haderrors)
4037		return (3);
4038
4039	return (0);
4040}
4041
4042typedef struct zdb_ddt_entry {
4043	ddt_key_t	zdde_key;
4044	uint64_t	zdde_ref_blocks;
4045	uint64_t	zdde_ref_lsize;
4046	uint64_t	zdde_ref_psize;
4047	uint64_t	zdde_ref_dsize;
4048	avl_node_t	zdde_node;
4049} zdb_ddt_entry_t;
4050
4051/* ARGSUSED */
4052static int
4053zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
4054    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
4055{
4056	avl_tree_t *t = arg;
4057	avl_index_t where;
4058	zdb_ddt_entry_t *zdde, zdde_search;
4059
4060	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
4061		return (0);
4062
4063	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
4064		(void) printf("traversing objset %llu, %llu objects, "
4065		    "%lu blocks so far\n",
4066		    (u_longlong_t)zb->zb_objset,
4067		    (u_longlong_t)BP_GET_FILL(bp),
4068		    avl_numnodes(t));
4069	}
4070
4071	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
4072	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
4073		return (0);
4074
4075	ddt_key_fill(&zdde_search.zdde_key, bp);
4076
4077	zdde = avl_find(t, &zdde_search, &where);
4078
4079	if (zdde == NULL) {
4080		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
4081		zdde->zdde_key = zdde_search.zdde_key;
4082		avl_insert(t, zdde, where);
4083	}
4084
4085	zdde->zdde_ref_blocks += 1;
4086	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
4087	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
4088	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
4089
4090	return (0);
4091}
4092
4093static void
4094dump_simulated_ddt(spa_t *spa)
4095{
4096	avl_tree_t t;
4097	void *cookie = NULL;
4098	zdb_ddt_entry_t *zdde;
4099	ddt_histogram_t ddh_total;
4100	ddt_stat_t dds_total;
4101
4102	bzero(&ddh_total, sizeof (ddh_total));
4103	bzero(&dds_total, sizeof (dds_total));
4104	avl_create(&t, ddt_entry_compare,
4105	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
4106
4107	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4108
4109	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
4110	    zdb_ddt_add_cb, &t);
4111
4112	spa_config_exit(spa, SCL_CONFIG, FTAG);
4113
4114	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
4115		ddt_stat_t dds;
4116		uint64_t refcnt = zdde->zdde_ref_blocks;
4117		ASSERT(refcnt != 0);
4118
4119		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
4120		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
4121		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
4122		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
4123
4124		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
4125		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
4126		dds.dds_ref_psize = zdde->zdde_ref_psize;
4127		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
4128
4129		ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
4130		    &dds, 0);
4131
4132		umem_free(zdde, sizeof (*zdde));
4133	}
4134
4135	avl_destroy(&t);
4136
4137	ddt_histogram_stat(&dds_total, &ddh_total);
4138
4139	(void) printf("Simulated DDT histogram:\n");
4140
4141	zpool_dump_ddt(&dds_total, &ddh_total);
4142
4143	dump_dedup_ratio(&dds_total);
4144}
4145
4146static int
4147verify_device_removal_feature_counts(spa_t *spa)
4148{
4149	uint64_t dr_feature_refcount = 0;
4150	uint64_t oc_feature_refcount = 0;
4151	uint64_t indirect_vdev_count = 0;
4152	uint64_t precise_vdev_count = 0;
4153	uint64_t obsolete_counts_object_count = 0;
4154	uint64_t obsolete_sm_count = 0;
4155	uint64_t obsolete_counts_count = 0;
4156	uint64_t scip_count = 0;
4157	uint64_t obsolete_bpobj_count = 0;
4158	int ret = 0;
4159
4160	spa_condensing_indirect_phys_t *scip =
4161	    &spa->spa_condensing_indirect_phys;
4162	if (scip->scip_next_mapping_object != 0) {
4163		vdev_t *vd = spa->spa_root_vdev->vdev_child[scip->scip_vdev];
4164		ASSERT(scip->scip_prev_obsolete_sm_object != 0);
4165		ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops);
4166
4167		(void) printf("Condensing indirect vdev %llu: new mapping "
4168		    "object %llu, prev obsolete sm %llu\n",
4169		    (u_longlong_t)scip->scip_vdev,
4170		    (u_longlong_t)scip->scip_next_mapping_object,
4171		    (u_longlong_t)scip->scip_prev_obsolete_sm_object);
4172		if (scip->scip_prev_obsolete_sm_object != 0) {
4173			space_map_t *prev_obsolete_sm = NULL;
4174			VERIFY0(space_map_open(&prev_obsolete_sm,
4175			    spa->spa_meta_objset,
4176			    scip->scip_prev_obsolete_sm_object,
4177			    0, vd->vdev_asize, 0));
4178			dump_spacemap(spa->spa_meta_objset, prev_obsolete_sm);
4179			(void) printf("\n");
4180			space_map_close(prev_obsolete_sm);
4181		}
4182
4183		scip_count += 2;
4184	}
4185
4186	for (uint64_t i = 0; i < spa->spa_root_vdev->vdev_children; i++) {
4187		vdev_t *vd = spa->spa_root_vdev->vdev_child[i];
4188		vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
4189
4190		if (vic->vic_mapping_object != 0) {
4191			ASSERT(vd->vdev_ops == &vdev_indirect_ops ||
4192			    vd->vdev_removing);
4193			indirect_vdev_count++;
4194
4195			if (vd->vdev_indirect_mapping->vim_havecounts) {
4196				obsolete_counts_count++;
4197			}
4198		}
4199		if (vdev_obsolete_counts_are_precise(vd)) {
4200			ASSERT(vic->vic_mapping_object != 0);
4201			precise_vdev_count++;
4202		}
4203		if (vdev_obsolete_sm_object(vd) != 0) {
4204			ASSERT(vic->vic_mapping_object != 0);
4205			obsolete_sm_count++;
4206		}
4207	}
4208
4209	(void) feature_get_refcount(spa,
4210	    &spa_feature_table[SPA_FEATURE_DEVICE_REMOVAL],
4211	    &dr_feature_refcount);
4212	(void) feature_get_refcount(spa,
4213	    &spa_feature_table[SPA_FEATURE_OBSOLETE_COUNTS],
4214	    &oc_feature_refcount);
4215
4216	if (dr_feature_refcount != indirect_vdev_count) {
4217		ret = 1;
4218		(void) printf("Number of indirect vdevs (%llu) " \
4219		    "does not match feature count (%llu)\n",
4220		    (u_longlong_t)indirect_vdev_count,
4221		    (u_longlong_t)dr_feature_refcount);
4222	} else {
4223		(void) printf("Verified device_removal feature refcount " \
4224		    "of %llu is correct\n",
4225		    (u_longlong_t)dr_feature_refcount);
4226	}
4227
4228	if (zap_contains(spa_meta_objset(spa), DMU_POOL_DIRECTORY_OBJECT,
4229	    DMU_POOL_OBSOLETE_BPOBJ) == 0) {
4230		obsolete_bpobj_count++;
4231	}
4232
4233
4234	obsolete_counts_object_count = precise_vdev_count;
4235	obsolete_counts_object_count += obsolete_sm_count;
4236	obsolete_counts_object_count += obsolete_counts_count;
4237	obsolete_counts_object_count += scip_count;
4238	obsolete_counts_object_count += obsolete_bpobj_count;
4239	obsolete_counts_object_count += remap_deadlist_count;
4240
4241	if (oc_feature_refcount != obsolete_counts_object_count) {
4242		ret = 1;
4243		(void) printf("Number of obsolete counts objects (%llu) " \
4244		    "does not match feature count (%llu)\n",
4245		    (u_longlong_t)obsolete_counts_object_count,
4246		    (u_longlong_t)oc_feature_refcount);
4247		(void) printf("pv:%llu os:%llu oc:%llu sc:%llu "
4248		    "ob:%llu rd:%llu\n",
4249		    (u_longlong_t)precise_vdev_count,
4250		    (u_longlong_t)obsolete_sm_count,
4251		    (u_longlong_t)obsolete_counts_count,
4252		    (u_longlong_t)scip_count,
4253		    (u_longlong_t)obsolete_bpobj_count,
4254		    (u_longlong_t)remap_deadlist_count);
4255	} else {
4256		(void) printf("Verified indirect_refcount feature refcount " \
4257		    "of %llu is correct\n",
4258		    (u_longlong_t)oc_feature_refcount);
4259	}
4260	return (ret);
4261}
4262
4263static void
4264zdb_set_skip_mmp(char *target)
4265{
4266	spa_t *spa;
4267
4268	/*
4269	 * Disable the activity check to allow examination of
4270	 * active pools.
4271	 */
4272	mutex_enter(&spa_namespace_lock);
4273	if ((spa = spa_lookup(target)) != NULL) {
4274		spa->spa_import_flags |= ZFS_IMPORT_SKIP_MMP;
4275	}
4276	mutex_exit(&spa_namespace_lock);
4277}
4278
4279#define	BOGUS_SUFFIX "_CHECKPOINTED_UNIVERSE"
4280/*
4281 * Import the checkpointed state of the pool specified by the target
4282 * parameter as readonly. The function also accepts a pool config
4283 * as an optional parameter, else it attempts to infer the config by
4284 * the name of the target pool.
4285 *
4286 * Note that the checkpointed state's pool name will be the name of
4287 * the original pool with the above suffix appened to it. In addition,
4288 * if the target is not a pool name (e.g. a path to a dataset) then
4289 * the new_path parameter is populated with the updated path to
4290 * reflect the fact that we are looking into the checkpointed state.
4291 *
4292 * The function returns a newly-allocated copy of the name of the
4293 * pool containing the checkpointed state. When this copy is no
4294 * longer needed it should be freed with free(3C). Same thing
4295 * applies to the new_path parameter if allocated.
4296 */
4297static char *
4298import_checkpointed_state(char *target, nvlist_t *cfg, char **new_path)
4299{
4300	int error = 0;
4301	char *poolname, *bogus_name;
4302
4303	/* If the target is not a pool, the extract the pool name */
4304	char *path_start = strchr(target, '/');
4305	if (path_start != NULL) {
4306		size_t poolname_len = path_start - target;
4307		poolname = strndup(target, poolname_len);
4308	} else {
4309		poolname = target;
4310	}
4311
4312	if (cfg == NULL) {
4313		zdb_set_skip_mmp(poolname);
4314		error = spa_get_stats(poolname, &cfg, NULL, 0);
4315		if (error != 0) {
4316			fatal("Tried to read config of pool \"%s\" but "
4317			    "spa_get_stats() failed with error %d\n",
4318			    poolname, error);
4319		}
4320	}
4321
4322	(void) asprintf(&bogus_name, "%s%s", poolname, BOGUS_SUFFIX);
4323	fnvlist_add_string(cfg, ZPOOL_CONFIG_POOL_NAME, bogus_name);
4324
4325	error = spa_import(bogus_name, cfg, NULL,
4326	    ZFS_IMPORT_MISSING_LOG | ZFS_IMPORT_CHECKPOINT |
4327	    ZFS_IMPORT_SKIP_MMP);
4328	if (error != 0) {
4329		fatal("Tried to import pool \"%s\" but spa_import() failed "
4330		    "with error %d\n", bogus_name, error);
4331	}
4332
4333	if (new_path != NULL && path_start != NULL)
4334		(void) asprintf(new_path, "%s%s", bogus_name, path_start);
4335
4336	if (target != poolname)
4337		free(poolname);
4338
4339	return (bogus_name);
4340}
4341
4342typedef struct verify_checkpoint_sm_entry_cb_arg {
4343	vdev_t *vcsec_vd;
4344
4345	/* the following fields are only used for printing progress */
4346	uint64_t vcsec_entryid;
4347	uint64_t vcsec_num_entries;
4348} verify_checkpoint_sm_entry_cb_arg_t;
4349
4350#define	ENTRIES_PER_PROGRESS_UPDATE 10000
4351
4352static int
4353verify_checkpoint_sm_entry_cb(space_map_entry_t *sme, void *arg)
4354{
4355	verify_checkpoint_sm_entry_cb_arg_t *vcsec = arg;
4356	vdev_t *vd = vcsec->vcsec_vd;
4357	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
4358	uint64_t end = sme->sme_offset + sme->sme_run;
4359
4360	ASSERT(sme->sme_type == SM_FREE);
4361
4362	if ((vcsec->vcsec_entryid % ENTRIES_PER_PROGRESS_UPDATE) == 0) {
4363		(void) fprintf(stderr,
4364		    "\rverifying vdev %llu, space map entry %llu of %llu ...",
4365		    (longlong_t)vd->vdev_id,
4366		    (longlong_t)vcsec->vcsec_entryid,
4367		    (longlong_t)vcsec->vcsec_num_entries);
4368	}
4369	vcsec->vcsec_entryid++;
4370
4371	/*
4372	 * See comment in checkpoint_sm_exclude_entry_cb()
4373	 */
4374	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
4375	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
4376
4377	/*
4378	 * The entries in the vdev_checkpoint_sm should be marked as
4379	 * allocated in the checkpointed state of the pool, therefore
4380	 * their respective ms_allocateable trees should not contain them.
4381	 */
4382	mutex_enter(&ms->ms_lock);
4383	range_tree_verify_not_present(ms->ms_allocatable,
4384	    sme->sme_offset, sme->sme_run);
4385	mutex_exit(&ms->ms_lock);
4386
4387	return (0);
4388}
4389
4390/*
4391 * Verify that all segments in the vdev_checkpoint_sm are allocated
4392 * according to the checkpoint's ms_sm (i.e. are not in the checkpoint's
4393 * ms_allocatable).
4394 *
4395 * Do so by comparing the checkpoint space maps (vdev_checkpoint_sm) of
4396 * each vdev in the current state of the pool to the metaslab space maps
4397 * (ms_sm) of the checkpointed state of the pool.
4398 *
4399 * Note that the function changes the state of the ms_allocatable
4400 * trees of the current spa_t. The entries of these ms_allocatable
4401 * trees are cleared out and then repopulated from with the free
4402 * entries of their respective ms_sm space maps.
4403 */
4404static void
4405verify_checkpoint_vdev_spacemaps(spa_t *checkpoint, spa_t *current)
4406{
4407	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4408	vdev_t *current_rvd = current->spa_root_vdev;
4409
4410	load_concrete_ms_allocatable_trees(checkpoint, SM_FREE);
4411
4412	for (uint64_t c = 0; c < ckpoint_rvd->vdev_children; c++) {
4413		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[c];
4414		vdev_t *current_vd = current_rvd->vdev_child[c];
4415
4416		space_map_t *checkpoint_sm = NULL;
4417		uint64_t checkpoint_sm_obj;
4418
4419		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4420			/*
4421			 * Since we don't allow device removal in a pool
4422			 * that has a checkpoint, we expect that all removed
4423			 * vdevs were removed from the pool before the
4424			 * checkpoint.
4425			 */
4426			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4427			continue;
4428		}
4429
4430		/*
4431		 * If the checkpoint space map doesn't exist, then nothing
4432		 * here is checkpointed so there's nothing to verify.
4433		 */
4434		if (current_vd->vdev_top_zap == 0 ||
4435		    zap_contains(spa_meta_objset(current),
4436		    current_vd->vdev_top_zap,
4437		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4438			continue;
4439
4440		VERIFY0(zap_lookup(spa_meta_objset(current),
4441		    current_vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4442		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4443
4444		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(current),
4445		    checkpoint_sm_obj, 0, current_vd->vdev_asize,
4446		    current_vd->vdev_ashift));
4447
4448		verify_checkpoint_sm_entry_cb_arg_t vcsec;
4449		vcsec.vcsec_vd = ckpoint_vd;
4450		vcsec.vcsec_entryid = 0;
4451		vcsec.vcsec_num_entries =
4452		    space_map_length(checkpoint_sm) / sizeof (uint64_t);
4453		VERIFY0(space_map_iterate(checkpoint_sm,
4454		    space_map_length(checkpoint_sm),
4455		    verify_checkpoint_sm_entry_cb, &vcsec));
4456		dump_spacemap(current->spa_meta_objset, checkpoint_sm);
4457		space_map_close(checkpoint_sm);
4458	}
4459
4460	/*
4461	 * If we've added vdevs since we took the checkpoint, ensure
4462	 * that their checkpoint space maps are empty.
4463	 */
4464	if (ckpoint_rvd->vdev_children < current_rvd->vdev_children) {
4465		for (uint64_t c = ckpoint_rvd->vdev_children;
4466		    c < current_rvd->vdev_children; c++) {
4467			vdev_t *current_vd = current_rvd->vdev_child[c];
4468			ASSERT3P(current_vd->vdev_checkpoint_sm, ==, NULL);
4469		}
4470	}
4471
4472	/* for cleaner progress output */
4473	(void) fprintf(stderr, "\n");
4474}
4475
4476/*
4477 * Verifies that all space that's allocated in the checkpoint is
4478 * still allocated in the current version, by checking that everything
4479 * in checkpoint's ms_allocatable (which is actually allocated, not
4480 * allocatable/free) is not present in current's ms_allocatable.
4481 *
4482 * Note that the function changes the state of the ms_allocatable
4483 * trees of both spas when called. The entries of all ms_allocatable
4484 * trees are cleared out and then repopulated from their respective
4485 * ms_sm space maps. In the checkpointed state we load the allocated
4486 * entries, and in the current state we load the free entries.
4487 */
4488static void
4489verify_checkpoint_ms_spacemaps(spa_t *checkpoint, spa_t *current)
4490{
4491	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4492	vdev_t *current_rvd = current->spa_root_vdev;
4493
4494	load_concrete_ms_allocatable_trees(checkpoint, SM_ALLOC);
4495	load_concrete_ms_allocatable_trees(current, SM_FREE);
4496
4497	for (uint64_t i = 0; i < ckpoint_rvd->vdev_children; i++) {
4498		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[i];
4499		vdev_t *current_vd = current_rvd->vdev_child[i];
4500
4501		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4502			/*
4503			 * See comment in verify_checkpoint_vdev_spacemaps()
4504			 */
4505			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4506			continue;
4507		}
4508
4509		for (uint64_t m = 0; m < ckpoint_vd->vdev_ms_count; m++) {
4510			metaslab_t *ckpoint_msp = ckpoint_vd->vdev_ms[m];
4511			metaslab_t *current_msp = current_vd->vdev_ms[m];
4512
4513			(void) fprintf(stderr,
4514			    "\rverifying vdev %llu of %llu, "
4515			    "metaslab %llu of %llu ...",
4516			    (longlong_t)current_vd->vdev_id,
4517			    (longlong_t)current_rvd->vdev_children,
4518			    (longlong_t)current_vd->vdev_ms[m]->ms_id,
4519			    (longlong_t)current_vd->vdev_ms_count);
4520
4521			/*
4522			 * We walk through the ms_allocatable trees that
4523			 * are loaded with the allocated blocks from the
4524			 * ms_sm spacemaps of the checkpoint. For each
4525			 * one of these ranges we ensure that none of them
4526			 * exists in the ms_allocatable trees of the
4527			 * current state which are loaded with the ranges
4528			 * that are currently free.
4529			 *
4530			 * This way we ensure that none of the blocks that
4531			 * are part of the checkpoint were freed by mistake.
4532			 */
4533			range_tree_walk(ckpoint_msp->ms_allocatable,
4534			    (range_tree_func_t *)range_tree_verify_not_present,
4535			    current_msp->ms_allocatable);
4536		}
4537	}
4538
4539	/* for cleaner progress output */
4540	(void) fprintf(stderr, "\n");
4541}
4542
4543static void
4544verify_checkpoint_blocks(spa_t *spa)
4545{
4546	ASSERT(!dump_opt['L']);
4547
4548	spa_t *checkpoint_spa;
4549	char *checkpoint_pool;
4550	nvlist_t *config = NULL;
4551	int error = 0;
4552
4553	/*
4554	 * We import the checkpointed state of the pool (under a different
4555	 * name) so we can do verification on it against the current state
4556	 * of the pool.
4557	 */
4558	checkpoint_pool = import_checkpointed_state(spa->spa_name, config,
4559	    NULL);
4560	ASSERT(strcmp(spa->spa_name, checkpoint_pool) != 0);
4561
4562	error = spa_open(checkpoint_pool, &checkpoint_spa, FTAG);
4563	if (error != 0) {
4564		fatal("Tried to open pool \"%s\" but spa_open() failed with "
4565		    "error %d\n", checkpoint_pool, error);
4566	}
4567
4568	/*
4569	 * Ensure that ranges in the checkpoint space maps of each vdev
4570	 * are allocated according to the checkpointed state's metaslab
4571	 * space maps.
4572	 */
4573	verify_checkpoint_vdev_spacemaps(checkpoint_spa, spa);
4574
4575	/*
4576	 * Ensure that allocated ranges in the checkpoint's metaslab
4577	 * space maps remain allocated in the metaslab space maps of
4578	 * the current state.
4579	 */
4580	verify_checkpoint_ms_spacemaps(checkpoint_spa, spa);
4581
4582	/*
4583	 * Once we are done, we get rid of the checkpointed state.
4584	 */
4585	spa_close(checkpoint_spa, FTAG);
4586	free(checkpoint_pool);
4587}
4588
4589static void
4590dump_leftover_checkpoint_blocks(spa_t *spa)
4591{
4592	vdev_t *rvd = spa->spa_root_vdev;
4593
4594	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
4595		vdev_t *vd = rvd->vdev_child[i];
4596
4597		space_map_t *checkpoint_sm = NULL;
4598		uint64_t checkpoint_sm_obj;
4599
4600		if (vd->vdev_top_zap == 0)
4601			continue;
4602
4603		if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
4604		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4605			continue;
4606
4607		VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
4608		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4609		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4610
4611		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
4612		    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
4613		dump_spacemap(spa->spa_meta_objset, checkpoint_sm);
4614		space_map_close(checkpoint_sm);
4615	}
4616}
4617
4618static int
4619verify_checkpoint(spa_t *spa)
4620{
4621	uberblock_t checkpoint;
4622	int error;
4623
4624	if (!spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT))
4625		return (0);
4626
4627	error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
4628	    DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t),
4629	    sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint);
4630
4631	if (error == ENOENT && !dump_opt['L']) {
4632		/*
4633		 * If the feature is active but the uberblock is missing
4634		 * then we must be in the middle of discarding the
4635		 * checkpoint.
4636		 */
4637		(void) printf("\nPartially discarded checkpoint "
4638		    "state found:\n");
4639		dump_leftover_checkpoint_blocks(spa);
4640		return (0);
4641	} else if (error != 0) {
4642		(void) printf("lookup error %d when looking for "
4643		    "checkpointed uberblock in MOS\n", error);
4644		return (error);
4645	}
4646	dump_uberblock(&checkpoint, "\nCheckpointed uberblock found:\n", "\n");
4647
4648	if (checkpoint.ub_checkpoint_txg == 0) {
4649		(void) printf("\nub_checkpoint_txg not set in checkpointed "
4650		    "uberblock\n");
4651		error = 3;
4652	}
4653
4654	if (error == 0 && !dump_opt['L'])
4655		verify_checkpoint_blocks(spa);
4656
4657	return (error);
4658}
4659
4660/* ARGSUSED */
4661static void
4662mos_leaks_cb(void *arg, uint64_t start, uint64_t size)
4663{
4664	for (uint64_t i = start; i < size; i++) {
4665		(void) printf("MOS object %llu referenced but not allocated\n",
4666		    (u_longlong_t)i);
4667	}
4668}
4669
4670static range_tree_t *mos_refd_objs;
4671
4672static void
4673mos_obj_refd(uint64_t obj)
4674{
4675	if (obj != 0 && mos_refd_objs != NULL)
4676		range_tree_add(mos_refd_objs, obj, 1);
4677}
4678
4679static void
4680mos_leak_vdev(vdev_t *vd)
4681{
4682	mos_obj_refd(vd->vdev_dtl_object);
4683	mos_obj_refd(vd->vdev_ms_array);
4684	mos_obj_refd(vd->vdev_top_zap);
4685	mos_obj_refd(vd->vdev_indirect_config.vic_births_object);
4686	mos_obj_refd(vd->vdev_indirect_config.vic_mapping_object);
4687	mos_obj_refd(vd->vdev_leaf_zap);
4688	if (vd->vdev_checkpoint_sm != NULL)
4689		mos_obj_refd(vd->vdev_checkpoint_sm->sm_object);
4690	if (vd->vdev_indirect_mapping != NULL) {
4691		mos_obj_refd(vd->vdev_indirect_mapping->
4692		    vim_phys->vimp_counts_object);
4693	}
4694	if (vd->vdev_obsolete_sm != NULL)
4695		mos_obj_refd(vd->vdev_obsolete_sm->sm_object);
4696
4697	for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
4698		metaslab_t *ms = vd->vdev_ms[m];
4699		mos_obj_refd(space_map_object(ms->ms_sm));
4700	}
4701
4702	for (uint64_t c = 0; c < vd->vdev_children; c++) {
4703		mos_leak_vdev(vd->vdev_child[c]);
4704	}
4705}
4706
4707static int
4708dump_mos_leaks(spa_t *spa)
4709{
4710	int rv = 0;
4711	objset_t *mos = spa->spa_meta_objset;
4712	dsl_pool_t *dp = spa->spa_dsl_pool;
4713
4714	/* Visit and mark all referenced objects in the MOS */
4715
4716	mos_obj_refd(DMU_POOL_DIRECTORY_OBJECT);
4717	mos_obj_refd(spa->spa_pool_props_object);
4718	mos_obj_refd(spa->spa_config_object);
4719	mos_obj_refd(spa->spa_ddt_stat_object);
4720	mos_obj_refd(spa->spa_feat_desc_obj);
4721	mos_obj_refd(spa->spa_feat_enabled_txg_obj);
4722	mos_obj_refd(spa->spa_feat_for_read_obj);
4723	mos_obj_refd(spa->spa_feat_for_write_obj);
4724	mos_obj_refd(spa->spa_history);
4725	mos_obj_refd(spa->spa_errlog_last);
4726	mos_obj_refd(spa->spa_errlog_scrub);
4727	mos_obj_refd(spa->spa_all_vdev_zaps);
4728	mos_obj_refd(spa->spa_dsl_pool->dp_bptree_obj);
4729	mos_obj_refd(spa->spa_dsl_pool->dp_tmp_userrefs_obj);
4730	mos_obj_refd(spa->spa_dsl_pool->dp_scan->scn_phys.scn_queue_obj);
4731	bpobj_count_refd(&spa->spa_deferred_bpobj);
4732	mos_obj_refd(dp->dp_empty_bpobj);
4733	bpobj_count_refd(&dp->dp_obsolete_bpobj);
4734	bpobj_count_refd(&dp->dp_free_bpobj);
4735	mos_obj_refd(spa->spa_l2cache.sav_object);
4736	mos_obj_refd(spa->spa_spares.sav_object);
4737
4738	mos_obj_refd(spa->spa_condensing_indirect_phys.
4739	    scip_next_mapping_object);
4740	mos_obj_refd(spa->spa_condensing_indirect_phys.
4741	    scip_prev_obsolete_sm_object);
4742	if (spa->spa_condensing_indirect_phys.scip_next_mapping_object != 0) {
4743		vdev_indirect_mapping_t *vim =
4744		    vdev_indirect_mapping_open(mos,
4745		    spa->spa_condensing_indirect_phys.scip_next_mapping_object);
4746		mos_obj_refd(vim->vim_phys->vimp_counts_object);
4747		vdev_indirect_mapping_close(vim);
4748	}
4749
4750	if (dp->dp_origin_snap != NULL) {
4751		dsl_dataset_t *ds;
4752
4753		dsl_pool_config_enter(dp, FTAG);
4754		VERIFY0(dsl_dataset_hold_obj(dp,
4755		    dsl_dataset_phys(dp->dp_origin_snap)->ds_next_snap_obj,
4756		    FTAG, &ds));
4757		count_ds_mos_objects(ds);
4758		dump_deadlist(&ds->ds_deadlist);
4759		dsl_dataset_rele(ds, FTAG);
4760		dsl_pool_config_exit(dp, FTAG);
4761
4762		count_ds_mos_objects(dp->dp_origin_snap);
4763		dump_deadlist(&dp->dp_origin_snap->ds_deadlist);
4764	}
4765	count_dir_mos_objects(dp->dp_mos_dir);
4766	if (dp->dp_free_dir != NULL)
4767		count_dir_mos_objects(dp->dp_free_dir);
4768	if (dp->dp_leak_dir != NULL)
4769		count_dir_mos_objects(dp->dp_leak_dir);
4770
4771	mos_leak_vdev(spa->spa_root_vdev);
4772
4773	for (uint64_t class = 0; class < DDT_CLASSES; class++) {
4774		for (uint64_t type = 0; type < DDT_TYPES; type++) {
4775			for (uint64_t cksum = 0;
4776			    cksum < ZIO_CHECKSUM_FUNCTIONS; cksum++) {
4777				ddt_t *ddt = spa->spa_ddt[cksum];
4778				mos_obj_refd(ddt->ddt_object[type][class]);
4779			}
4780		}
4781	}
4782
4783	/*
4784	 * Visit all allocated objects and make sure they are referenced.
4785	 */
4786	uint64_t object = 0;
4787	while (dmu_object_next(mos, &object, B_FALSE, 0) == 0) {
4788		if (range_tree_contains(mos_refd_objs, object, 1)) {
4789			range_tree_remove(mos_refd_objs, object, 1);
4790		} else {
4791			dmu_object_info_t doi;
4792			const char *name;
4793			dmu_object_info(mos, object, &doi);
4794			if (doi.doi_type & DMU_OT_NEWTYPE) {
4795				dmu_object_byteswap_t bswap =
4796				    DMU_OT_BYTESWAP(doi.doi_type);
4797				name = dmu_ot_byteswap[bswap].ob_name;
4798			} else {
4799				name = dmu_ot[doi.doi_type].ot_name;
4800			}
4801
4802			(void) printf("MOS object %llu (%s) leaked\n",
4803			    (u_longlong_t)object, name);
4804			rv = 2;
4805		}
4806	}
4807	(void) range_tree_walk(mos_refd_objs, mos_leaks_cb, NULL);
4808	if (!range_tree_is_empty(mos_refd_objs))
4809		rv = 2;
4810	range_tree_vacate(mos_refd_objs, NULL, NULL);
4811	range_tree_destroy(mos_refd_objs);
4812	return (rv);
4813}
4814
4815static void
4816dump_zpool(spa_t *spa)
4817{
4818	dsl_pool_t *dp = spa_get_dsl(spa);
4819	int rc = 0;
4820
4821	if (dump_opt['S']) {
4822		dump_simulated_ddt(spa);
4823		return;
4824	}
4825
4826	if (!dump_opt['e'] && dump_opt['C'] > 1) {
4827		(void) printf("\nCached configuration:\n");
4828		dump_nvlist(spa->spa_config, 8);
4829	}
4830
4831	if (dump_opt['C'])
4832		dump_config(spa);
4833
4834	if (dump_opt['u'])
4835		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
4836
4837	if (dump_opt['D'])
4838		dump_all_ddts(spa);
4839
4840	if (dump_opt['d'] > 2 || dump_opt['m'])
4841		dump_metaslabs(spa);
4842	if (dump_opt['M'])
4843		dump_metaslab_groups(spa);
4844
4845	if (dump_opt['d'] || dump_opt['i']) {
4846		mos_refd_objs = range_tree_create(NULL, NULL);
4847		dump_dir(dp->dp_meta_objset);
4848
4849		if (dump_opt['d'] >= 3) {
4850			dsl_pool_t *dp = spa->spa_dsl_pool;
4851			dump_full_bpobj(&spa->spa_deferred_bpobj,
4852			    "Deferred frees", 0);
4853			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
4854				dump_full_bpobj(&dp->dp_free_bpobj,
4855				    "Pool snapshot frees", 0);
4856			}
4857			if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
4858				ASSERT(spa_feature_is_enabled(spa,
4859				    SPA_FEATURE_DEVICE_REMOVAL));
4860				dump_full_bpobj(&dp->dp_obsolete_bpobj,
4861				    "Pool obsolete blocks", 0);
4862			}
4863
4864			if (spa_feature_is_active(spa,
4865			    SPA_FEATURE_ASYNC_DESTROY)) {
4866				dump_bptree(spa->spa_meta_objset,
4867				    dp->dp_bptree_obj,
4868				    "Pool dataset frees");
4869			}
4870			dump_dtl(spa->spa_root_vdev, 0);
4871		}
4872		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
4873		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
4874
4875		if (rc == 0 && !dump_opt['L'])
4876			rc = dump_mos_leaks(spa);
4877
4878		for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
4879			uint64_t refcount;
4880
4881			if (!(spa_feature_table[f].fi_flags &
4882			    ZFEATURE_FLAG_PER_DATASET) ||
4883			    !spa_feature_is_enabled(spa, f)) {
4884				ASSERT0(dataset_feature_count[f]);
4885				continue;
4886			}
4887			(void) feature_get_refcount(spa,
4888			    &spa_feature_table[f], &refcount);
4889			if (dataset_feature_count[f] != refcount) {
4890				(void) printf("%s feature refcount mismatch: "
4891				    "%lld datasets != %lld refcount\n",
4892				    spa_feature_table[f].fi_uname,
4893				    (longlong_t)dataset_feature_count[f],
4894				    (longlong_t)refcount);
4895				rc = 2;
4896			} else {
4897				(void) printf("Verified %s feature refcount "
4898				    "of %llu is correct\n",
4899				    spa_feature_table[f].fi_uname,
4900				    (longlong_t)refcount);
4901			}
4902		}
4903
4904		if (rc == 0) {
4905			rc = verify_device_removal_feature_counts(spa);
4906		}
4907	}
4908
4909	if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
4910		rc = dump_block_stats(spa);
4911
4912	if (rc == 0)
4913		rc = verify_spacemap_refcounts(spa);
4914
4915	if (dump_opt['s'])
4916		show_pool_stats(spa);
4917
4918	if (dump_opt['h'])
4919		dump_history(spa);
4920
4921	if (rc == 0)
4922		rc = verify_checkpoint(spa);
4923
4924	if (rc != 0) {
4925		dump_debug_buffer();
4926		exit(rc);
4927	}
4928}
4929
4930#define	ZDB_FLAG_CHECKSUM	0x0001
4931#define	ZDB_FLAG_DECOMPRESS	0x0002
4932#define	ZDB_FLAG_BSWAP		0x0004
4933#define	ZDB_FLAG_GBH		0x0008
4934#define	ZDB_FLAG_INDIRECT	0x0010
4935#define	ZDB_FLAG_PHYS		0x0020
4936#define	ZDB_FLAG_RAW		0x0040
4937#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
4938
4939static int flagbits[256];
4940
4941static void
4942zdb_print_blkptr(blkptr_t *bp, int flags)
4943{
4944	char blkbuf[BP_SPRINTF_LEN];
4945
4946	if (flags & ZDB_FLAG_BSWAP)
4947		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
4948
4949	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
4950	(void) printf("%s\n", blkbuf);
4951}
4952
4953static void
4954zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
4955{
4956	int i;
4957
4958	for (i = 0; i < nbps; i++)
4959		zdb_print_blkptr(&bp[i], flags);
4960}
4961
4962static void
4963zdb_dump_gbh(void *buf, int flags)
4964{
4965	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
4966}
4967
4968static void
4969zdb_dump_block_raw(void *buf, uint64_t size, int flags)
4970{
4971	if (flags & ZDB_FLAG_BSWAP)
4972		byteswap_uint64_array(buf, size);
4973	(void) write(1, buf, size);
4974}
4975
4976static void
4977zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
4978{
4979	uint64_t *d = (uint64_t *)buf;
4980	unsigned nwords = size / sizeof (uint64_t);
4981	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
4982	unsigned i, j;
4983	const char *hdr;
4984	char *c;
4985
4986
4987	if (do_bswap)
4988		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
4989	else
4990		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
4991
4992	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
4993
4994	for (i = 0; i < nwords; i += 2) {
4995		(void) printf("%06llx:  %016llx  %016llx  ",
4996		    (u_longlong_t)(i * sizeof (uint64_t)),
4997		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
4998		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
4999
5000		c = (char *)&d[i];
5001		for (j = 0; j < 2 * sizeof (uint64_t); j++)
5002			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
5003		(void) printf("\n");
5004	}
5005}
5006
5007/*
5008 * There are two acceptable formats:
5009 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
5010 *	child[.child]*    - For example: 0.1.1
5011 *
5012 * The second form can be used to specify arbitrary vdevs anywhere
5013 * in the heirarchy.  For example, in a pool with a mirror of
5014 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
5015 */
5016static vdev_t *
5017zdb_vdev_lookup(vdev_t *vdev, const char *path)
5018{
5019	char *s, *p, *q;
5020	unsigned i;
5021
5022	if (vdev == NULL)
5023		return (NULL);
5024
5025	/* First, assume the x.x.x.x format */
5026	i = strtoul(path, &s, 10);
5027	if (s == path || (s && *s != '.' && *s != '\0'))
5028		goto name;
5029	if (i >= vdev->vdev_children)
5030		return (NULL);
5031
5032	vdev = vdev->vdev_child[i];
5033	if (*s == '\0')
5034		return (vdev);
5035	return (zdb_vdev_lookup(vdev, s+1));
5036
5037name:
5038	for (i = 0; i < vdev->vdev_children; i++) {
5039		vdev_t *vc = vdev->vdev_child[i];
5040
5041		if (vc->vdev_path == NULL) {
5042			vc = zdb_vdev_lookup(vc, path);
5043			if (vc == NULL)
5044				continue;
5045			else
5046				return (vc);
5047		}
5048
5049		p = strrchr(vc->vdev_path, '/');
5050		p = p ? p + 1 : vc->vdev_path;
5051		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
5052
5053		if (strcmp(vc->vdev_path, path) == 0)
5054			return (vc);
5055		if (strcmp(p, path) == 0)
5056			return (vc);
5057		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
5058			return (vc);
5059	}
5060
5061	return (NULL);
5062}
5063
5064/* ARGSUSED */
5065static int
5066random_get_pseudo_bytes_cb(void *buf, size_t len, void *unused)
5067{
5068	return (random_get_pseudo_bytes(buf, len));
5069}
5070
5071/*
5072 * Read a block from a pool and print it out.  The syntax of the
5073 * block descriptor is:
5074 *
5075 *	pool:vdev_specifier:offset:size[:flags]
5076 *
5077 *	pool           - The name of the pool you wish to read from
5078 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
5079 *	offset         - offset, in hex, in bytes
5080 *	size           - Amount of data to read, in hex, in bytes
5081 *	flags          - A string of characters specifying options
5082 *		 b: Decode a blkptr at given offset within block
5083 *		*c: Calculate and display checksums
5084 *		 d: Decompress data before dumping
5085 *		 e: Byteswap data before dumping
5086 *		 g: Display data as a gang block header
5087 *		 i: Display as an indirect block
5088 *		 p: Do I/O to physical offset
5089 *		 r: Dump raw data to stdout
5090 *
5091 *              * = not yet implemented
5092 */
5093static void
5094zdb_read_block(char *thing, spa_t *spa)
5095{
5096	blkptr_t blk, *bp = &blk;
5097	dva_t *dva = bp->blk_dva;
5098	int flags = 0;
5099	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
5100	zio_t *zio;
5101	vdev_t *vd;
5102	abd_t *pabd;
5103	void *lbuf, *buf;
5104	const char *s, *vdev;
5105	char *p, *dup, *flagstr;
5106	int i, error;
5107
5108	dup = strdup(thing);
5109	s = strtok(dup, ":");
5110	vdev = s ? s : "";
5111	s = strtok(NULL, ":");
5112	offset = strtoull(s ? s : "", NULL, 16);
5113	s = strtok(NULL, ":");
5114	size = strtoull(s ? s : "", NULL, 16);
5115	s = strtok(NULL, ":");
5116	if (s)
5117		flagstr = strdup(s);
5118	else
5119		flagstr = strdup("");
5120
5121	s = NULL;
5122	if (size == 0)
5123		s = "size must not be zero";
5124	if (!IS_P2ALIGNED(size, DEV_BSIZE))
5125		s = "size must be a multiple of sector size";
5126	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
5127		s = "offset must be a multiple of sector size";
5128	if (s) {
5129		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
5130		free(dup);
5131		return;
5132	}
5133
5134	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
5135		for (i = 0; flagstr[i]; i++) {
5136			int bit = flagbits[(uchar_t)flagstr[i]];
5137
5138			if (bit == 0) {
5139				(void) printf("***Invalid flag: %c\n",
5140				    flagstr[i]);
5141				continue;
5142			}
5143			flags |= bit;
5144
5145			/* If it's not something with an argument, keep going */
5146			if ((bit & (ZDB_FLAG_CHECKSUM |
5147			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
5148				continue;
5149
5150			p = &flagstr[i + 1];
5151			if (bit == ZDB_FLAG_PRINT_BLKPTR)
5152				blkptr_offset = strtoull(p, &p, 16);
5153			if (*p != ':' && *p != '\0') {
5154				(void) printf("***Invalid flag arg: '%s'\n", s);
5155				free(dup);
5156				return;
5157			}
5158		}
5159	}
5160	free(flagstr);
5161
5162	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
5163	if (vd == NULL) {
5164		(void) printf("***Invalid vdev: %s\n", vdev);
5165		free(dup);
5166		return;
5167	} else {
5168		if (vd->vdev_path)
5169			(void) fprintf(stderr, "Found vdev: %s\n",
5170			    vd->vdev_path);
5171		else
5172			(void) fprintf(stderr, "Found vdev type: %s\n",
5173			    vd->vdev_ops->vdev_op_type);
5174	}
5175
5176	psize = size;
5177	lsize = size;
5178
5179	pabd = abd_alloc_linear(SPA_MAXBLOCKSIZE, B_FALSE);
5180	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5181
5182	BP_ZERO(bp);
5183
5184	DVA_SET_VDEV(&dva[0], vd->vdev_id);
5185	DVA_SET_OFFSET(&dva[0], offset);
5186	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
5187	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
5188
5189	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
5190
5191	BP_SET_LSIZE(bp, lsize);
5192	BP_SET_PSIZE(bp, psize);
5193	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
5194	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
5195	BP_SET_TYPE(bp, DMU_OT_NONE);
5196	BP_SET_LEVEL(bp, 0);
5197	BP_SET_DEDUP(bp, 0);
5198	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
5199
5200	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
5201	zio = zio_root(spa, NULL, NULL, 0);
5202
5203	if (vd == vd->vdev_top) {
5204		/*
5205		 * Treat this as a normal block read.
5206		 */
5207		zio_nowait(zio_read(zio, spa, bp, pabd, psize, NULL, NULL,
5208		    ZIO_PRIORITY_SYNC_READ,
5209		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
5210	} else {
5211		/*
5212		 * Treat this as a vdev child I/O.
5213		 */
5214		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pabd,
5215		    psize, ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
5216		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
5217		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
5218		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | ZIO_FLAG_OPTIONAL,
5219		    NULL, NULL));
5220	}
5221
5222	error = zio_wait(zio);
5223	spa_config_exit(spa, SCL_STATE, FTAG);
5224
5225	if (error) {
5226		(void) printf("Read of %s failed, error: %d\n", thing, error);
5227		goto out;
5228	}
5229
5230	if (flags & ZDB_FLAG_DECOMPRESS) {
5231		/*
5232		 * We don't know how the data was compressed, so just try
5233		 * every decompress function at every inflated blocksize.
5234		 */
5235		enum zio_compress c;
5236		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5237		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5238
5239		abd_copy_to_buf(pbuf2, pabd, psize);
5240
5241		VERIFY0(abd_iterate_func(pabd, psize, SPA_MAXBLOCKSIZE - psize,
5242		    random_get_pseudo_bytes_cb, NULL));
5243
5244		VERIFY0(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
5245		    SPA_MAXBLOCKSIZE - psize));
5246
5247		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
5248		    lsize -= SPA_MINBLOCKSIZE) {
5249			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
5250				if (zio_decompress_data(c, pabd,
5251				    lbuf, psize, lsize) == 0 &&
5252				    zio_decompress_data_buf(c, pbuf2,
5253				    lbuf2, psize, lsize) == 0 &&
5254				    bcmp(lbuf, lbuf2, lsize) == 0)
5255					break;
5256			}
5257			if (c != ZIO_COMPRESS_FUNCTIONS)
5258				break;
5259			lsize -= SPA_MINBLOCKSIZE;
5260		}
5261
5262		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
5263		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
5264
5265		if (lsize <= psize) {
5266			(void) printf("Decompress of %s failed\n", thing);
5267			goto out;
5268		}
5269		buf = lbuf;
5270		size = lsize;
5271	} else {
5272		buf = abd_to_buf(pabd);
5273		size = psize;
5274	}
5275
5276	if (flags & ZDB_FLAG_PRINT_BLKPTR)
5277		zdb_print_blkptr((blkptr_t *)(void *)
5278		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
5279	else if (flags & ZDB_FLAG_RAW)
5280		zdb_dump_block_raw(buf, size, flags);
5281	else if (flags & ZDB_FLAG_INDIRECT)
5282		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
5283		    flags);
5284	else if (flags & ZDB_FLAG_GBH)
5285		zdb_dump_gbh(buf, flags);
5286	else
5287		zdb_dump_block(thing, buf, size, flags);
5288
5289out:
5290	abd_free(pabd);
5291	umem_free(lbuf, SPA_MAXBLOCKSIZE);
5292	free(dup);
5293}
5294
5295static void
5296zdb_embedded_block(char *thing)
5297{
5298	blkptr_t bp;
5299	unsigned long long *words = (void *)&bp;
5300	char *buf;
5301	int err;
5302
5303	bzero(&bp, sizeof (bp));
5304	err = sscanf(thing, "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx:"
5305	    "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx",
5306	    words + 0, words + 1, words + 2, words + 3,
5307	    words + 4, words + 5, words + 6, words + 7,
5308	    words + 8, words + 9, words + 10, words + 11,
5309	    words + 12, words + 13, words + 14, words + 15);
5310	if (err != 16) {
5311		(void) fprintf(stderr, "invalid input format\n");
5312		exit(1);
5313	}
5314	ASSERT3U(BPE_GET_LSIZE(&bp), <=, SPA_MAXBLOCKSIZE);
5315	buf = malloc(SPA_MAXBLOCKSIZE);
5316	if (buf == NULL) {
5317		(void) fprintf(stderr, "out of memory\n");
5318		exit(1);
5319	}
5320	err = decode_embedded_bp(&bp, buf, BPE_GET_LSIZE(&bp));
5321	if (err != 0) {
5322		(void) fprintf(stderr, "decode failed: %u\n", err);
5323		exit(1);
5324	}
5325	zdb_dump_block_raw(buf, BPE_GET_LSIZE(&bp), 0);
5326	free(buf);
5327}
5328
5329int
5330main(int argc, char **argv)
5331{
5332	int c;
5333	struct rlimit rl = { 1024, 1024 };
5334	spa_t *spa = NULL;
5335	objset_t *os = NULL;
5336	int dump_all = 1;
5337	int verbose = 0;
5338	int error = 0;
5339	char **searchdirs = NULL;
5340	int nsearch = 0;
5341	char *target, *target_pool;
5342	nvlist_t *policy = NULL;
5343	uint64_t max_txg = UINT64_MAX;
5344	int flags = ZFS_IMPORT_MISSING_LOG;
5345	int rewind = ZPOOL_NEVER_REWIND;
5346	char *spa_config_path_env;
5347	boolean_t target_is_spa = B_TRUE;
5348	nvlist_t *cfg = NULL;
5349
5350	(void) setrlimit(RLIMIT_NOFILE, &rl);
5351	(void) enable_extended_FILE_stdio(-1, -1);
5352
5353	dprintf_setup(&argc, argv);
5354
5355	/*
5356	 * If there is an environment variable SPA_CONFIG_PATH it overrides
5357	 * default spa_config_path setting. If -U flag is specified it will
5358	 * override this environment variable settings once again.
5359	 */
5360	spa_config_path_env = getenv("SPA_CONFIG_PATH");
5361	if (spa_config_path_env != NULL)
5362		spa_config_path = spa_config_path_env;
5363
5364	while ((c = getopt(argc, argv,
5365	    "AbcCdDeEFGhiI:klLmMo:Op:PqRsSt:uU:vVx:X")) != -1) {
5366		switch (c) {
5367		case 'b':
5368		case 'c':
5369		case 'C':
5370		case 'd':
5371		case 'D':
5372		case 'E':
5373		case 'G':
5374		case 'h':
5375		case 'i':
5376		case 'l':
5377		case 'm':
5378		case 'M':
5379		case 'O':
5380		case 'R':
5381		case 's':
5382		case 'S':
5383		case 'u':
5384			dump_opt[c]++;
5385			dump_all = 0;
5386			break;
5387		case 'A':
5388		case 'e':
5389		case 'F':
5390		case 'k':
5391		case 'L':
5392		case 'P':
5393		case 'q':
5394		case 'X':
5395			dump_opt[c]++;
5396			break;
5397		/* NB: Sort single match options below. */
5398		case 'I':
5399			max_inflight = strtoull(optarg, NULL, 0);
5400			if (max_inflight == 0) {
5401				(void) fprintf(stderr, "maximum number "
5402				    "of inflight I/Os must be greater "
5403				    "than 0\n");
5404				usage();
5405			}
5406			break;
5407		case 'o':
5408			error = set_global_var(optarg);
5409			if (error != 0)
5410				usage();
5411			break;
5412		case 'p':
5413			if (searchdirs == NULL) {
5414				searchdirs = umem_alloc(sizeof (char *),
5415				    UMEM_NOFAIL);
5416			} else {
5417				char **tmp = umem_alloc((nsearch + 1) *
5418				    sizeof (char *), UMEM_NOFAIL);
5419				bcopy(searchdirs, tmp, nsearch *
5420				    sizeof (char *));
5421				umem_free(searchdirs,
5422				    nsearch * sizeof (char *));
5423				searchdirs = tmp;
5424			}
5425			searchdirs[nsearch++] = optarg;
5426			break;
5427		case 't':
5428			max_txg = strtoull(optarg, NULL, 0);
5429			if (max_txg < TXG_INITIAL) {
5430				(void) fprintf(stderr, "incorrect txg "
5431				    "specified: %s\n", optarg);
5432				usage();
5433			}
5434			break;
5435		case 'U':
5436			spa_config_path = optarg;
5437			if (spa_config_path[0] != '/') {
5438				(void) fprintf(stderr,
5439				    "cachefile must be an absolute path "
5440				    "(i.e. start with a slash)\n");
5441				usage();
5442			}
5443			break;
5444		case 'v':
5445			verbose++;
5446			break;
5447		case 'V':
5448			flags = ZFS_IMPORT_VERBATIM;
5449			break;
5450		case 'x':
5451			vn_dumpdir = optarg;
5452			break;
5453		default:
5454			usage();
5455			break;
5456		}
5457	}
5458
5459	if (!dump_opt['e'] && searchdirs != NULL) {
5460		(void) fprintf(stderr, "-p option requires use of -e\n");
5461		usage();
5462	}
5463
5464	/*
5465	 * ZDB does not typically re-read blocks; therefore limit the ARC
5466	 * to 256 MB, which can be used entirely for metadata.
5467	 */
5468	zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
5469
5470	/*
5471	 * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
5472	 * "zdb -b" uses traversal prefetch which uses async reads.
5473	 * For good performance, let several of them be active at once.
5474	 */
5475	zfs_vdev_async_read_max_active = 10;
5476
5477	/*
5478	 * Disable reference tracking for better performance.
5479	 */
5480	reference_tracking_enable = B_FALSE;
5481
5482	/*
5483	 * Do not fail spa_load when spa_load_verify fails. This is needed
5484	 * to load non-idle pools.
5485	 */
5486	spa_load_verify_dryrun = B_TRUE;
5487
5488	kernel_init(FREAD);
5489	g_zfs = libzfs_init();
5490	ASSERT(g_zfs != NULL);
5491
5492	if (dump_all)
5493		verbose = MAX(verbose, 1);
5494
5495	for (c = 0; c < 256; c++) {
5496		if (dump_all && strchr("AeEFklLOPRSX", c) == NULL)
5497			dump_opt[c] = 1;
5498		if (dump_opt[c])
5499			dump_opt[c] += verbose;
5500	}
5501
5502	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
5503	zfs_recover = (dump_opt['A'] > 1);
5504
5505	argc -= optind;
5506	argv += optind;
5507
5508	if (argc < 2 && dump_opt['R'])
5509		usage();
5510
5511	if (dump_opt['E']) {
5512		if (argc != 1)
5513			usage();
5514		zdb_embedded_block(argv[0]);
5515		return (0);
5516	}
5517
5518	if (argc < 1) {
5519		if (!dump_opt['e'] && dump_opt['C']) {
5520			dump_cachefile(spa_config_path);
5521			return (0);
5522		}
5523		usage();
5524	}
5525
5526	if (dump_opt['l'])
5527		return (dump_label(argv[0]));
5528
5529	if (dump_opt['O']) {
5530		if (argc != 2)
5531			usage();
5532		dump_opt['v'] = verbose + 3;
5533		return (dump_path(argv[0], argv[1]));
5534	}
5535
5536	if (dump_opt['X'] || dump_opt['F'])
5537		rewind = ZPOOL_DO_REWIND |
5538		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
5539
5540	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
5541	    nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, max_txg) != 0 ||
5542	    nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY, rewind) != 0)
5543		fatal("internal error: %s", strerror(ENOMEM));
5544
5545	error = 0;
5546	target = argv[0];
5547
5548	if (strpbrk(target, "/@") != NULL) {
5549		size_t targetlen;
5550
5551		target_pool = strdup(target);
5552		*strpbrk(target_pool, "/@") = '\0';
5553
5554		target_is_spa = B_FALSE;
5555		targetlen = strlen(target);
5556		if (targetlen && target[targetlen - 1] == '/')
5557			target[targetlen - 1] = '\0';
5558	} else {
5559		target_pool = target;
5560	}
5561
5562	if (dump_opt['e']) {
5563		importargs_t args = { 0 };
5564
5565		args.paths = nsearch;
5566		args.path = searchdirs;
5567		args.can_be_active = B_TRUE;
5568
5569		error = zpool_tryimport(g_zfs, target_pool, &cfg, &args);
5570
5571		if (error == 0) {
5572
5573			if (nvlist_add_nvlist(cfg,
5574			    ZPOOL_LOAD_POLICY, policy) != 0) {
5575				fatal("can't open '%s': %s",
5576				    target, strerror(ENOMEM));
5577			}
5578
5579			if (dump_opt['C'] > 1) {
5580				(void) printf("\nConfiguration for import:\n");
5581				dump_nvlist(cfg, 8);
5582			}
5583
5584			/*
5585			 * Disable the activity check to allow examination of
5586			 * active pools.
5587			 */
5588			error = spa_import(target_pool, cfg, NULL,
5589			    flags | ZFS_IMPORT_SKIP_MMP);
5590		}
5591	}
5592
5593	char *checkpoint_pool = NULL;
5594	char *checkpoint_target = NULL;
5595	if (dump_opt['k']) {
5596		checkpoint_pool = import_checkpointed_state(target, cfg,
5597		    &checkpoint_target);
5598
5599		if (checkpoint_target != NULL)
5600			target = checkpoint_target;
5601
5602	}
5603
5604	if (error == 0) {
5605		if (dump_opt['k'] && (target_is_spa || dump_opt['R'])) {
5606			ASSERT(checkpoint_pool != NULL);
5607			ASSERT(checkpoint_target == NULL);
5608
5609			error = spa_open(checkpoint_pool, &spa, FTAG);
5610			if (error != 0) {
5611				fatal("Tried to open pool \"%s\" but "
5612				    "spa_open() failed with error %d\n",
5613				    checkpoint_pool, error);
5614			}
5615
5616		} else if (target_is_spa || dump_opt['R']) {
5617			zdb_set_skip_mmp(target);
5618			error = spa_open_rewind(target, &spa, FTAG, policy,
5619			    NULL);
5620			if (error) {
5621				/*
5622				 * If we're missing the log device then
5623				 * try opening the pool after clearing the
5624				 * log state.
5625				 */
5626				mutex_enter(&spa_namespace_lock);
5627				if ((spa = spa_lookup(target)) != NULL &&
5628				    spa->spa_log_state == SPA_LOG_MISSING) {
5629					spa->spa_log_state = SPA_LOG_CLEAR;
5630					error = 0;
5631				}
5632				mutex_exit(&spa_namespace_lock);
5633
5634				if (!error) {
5635					error = spa_open_rewind(target, &spa,
5636					    FTAG, policy, NULL);
5637				}
5638			}
5639		} else {
5640			zdb_set_skip_mmp(target);
5641			error = open_objset(target, DMU_OST_ANY, FTAG, &os);
5642		}
5643	}
5644	nvlist_free(policy);
5645
5646	if (error)
5647		fatal("can't open '%s': %s", target, strerror(error));
5648
5649	argv++;
5650	argc--;
5651	if (!dump_opt['R']) {
5652		if (argc > 0) {
5653			zopt_objects = argc;
5654			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
5655			for (unsigned i = 0; i < zopt_objects; i++) {
5656				errno = 0;
5657				zopt_object[i] = strtoull(argv[i], NULL, 0);
5658				if (zopt_object[i] == 0 && errno != 0)
5659					fatal("bad number %s: %s",
5660					    argv[i], strerror(errno));
5661			}
5662		}
5663		if (os != NULL) {
5664			dump_dir(os);
5665		} else if (zopt_objects > 0 && !dump_opt['m']) {
5666			dump_dir(spa->spa_meta_objset);
5667		} else {
5668			dump_zpool(spa);
5669		}
5670	} else {
5671		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
5672		flagbits['c'] = ZDB_FLAG_CHECKSUM;
5673		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
5674		flagbits['e'] = ZDB_FLAG_BSWAP;
5675		flagbits['g'] = ZDB_FLAG_GBH;
5676		flagbits['i'] = ZDB_FLAG_INDIRECT;
5677		flagbits['p'] = ZDB_FLAG_PHYS;
5678		flagbits['r'] = ZDB_FLAG_RAW;
5679
5680		for (int i = 0; i < argc; i++)
5681			zdb_read_block(argv[i], spa);
5682	}
5683
5684	if (dump_opt['k']) {
5685		free(checkpoint_pool);
5686		if (!target_is_spa)
5687			free(checkpoint_target);
5688	}
5689
5690	if (os != NULL)
5691		close_objset(os, FTAG);
5692	else
5693		spa_close(spa, FTAG);
5694
5695	fuid_table_destroy();
5696
5697	dump_debug_buffer();
5698
5699	libzfs_fini(g_zfs);
5700	kernel_fini();
5701
5702	return (error);
5703}
5704