zdb.c revision 64723e361134b2a2c45341334174f9d34002f8d0
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, 2016 by Delphix. All rights reserved.
25 * Copyright (c) 2014 Integros [integros.com]
26 * Copyright 2016 Nexenta Systems, Inc.
27 */
28
29#include <stdio.h>
30#include <unistd.h>
31#include <stdio_ext.h>
32#include <stdlib.h>
33#include <ctype.h>
34#include <sys/zfs_context.h>
35#include <sys/spa.h>
36#include <sys/spa_impl.h>
37#include <sys/dmu.h>
38#include <sys/zap.h>
39#include <sys/fs/zfs.h>
40#include <sys/zfs_znode.h>
41#include <sys/zfs_sa.h>
42#include <sys/sa.h>
43#include <sys/sa_impl.h>
44#include <sys/vdev.h>
45#include <sys/vdev_impl.h>
46#include <sys/metaslab_impl.h>
47#include <sys/dmu_objset.h>
48#include <sys/dsl_dir.h>
49#include <sys/dsl_dataset.h>
50#include <sys/dsl_pool.h>
51#include <sys/dbuf.h>
52#include <sys/zil.h>
53#include <sys/zil_impl.h>
54#include <sys/stat.h>
55#include <sys/resource.h>
56#include <sys/dmu_traverse.h>
57#include <sys/zio_checksum.h>
58#include <sys/zio_compress.h>
59#include <sys/zfs_fuid.h>
60#include <sys/arc.h>
61#include <sys/ddt.h>
62#include <sys/zfeature.h>
63#include <zfs_comutil.h>
64#undef verify
65#include <libzfs.h>
66
67#define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
68	zio_compress_table[(idx)].ci_name : "UNKNOWN")
69#define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
70	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
71#define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
72	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
73	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
74#define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
75	(((idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA) ?	\
76	DMU_OT_ZAP_OTHER : DMU_OT_NUMTYPES))
77
78#ifndef lint
79extern int reference_tracking_enable;
80extern boolean_t zfs_recover;
81extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
82extern int zfs_vdev_async_read_max_active;
83#else
84int reference_tracking_enable;
85boolean_t zfs_recover;
86uint64_t zfs_arc_max, zfs_arc_meta_limit;
87int zfs_vdev_async_read_max_active;
88#endif
89
90const char cmdname[] = "zdb";
91uint8_t dump_opt[256];
92
93typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
94
95extern void dump_intent_log(zilog_t *);
96uint64_t *zopt_object = NULL;
97int zopt_objects = 0;
98libzfs_handle_t *g_zfs;
99uint64_t max_inflight = 1000;
100
101static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
102
103/*
104 * These libumem hooks provide a reasonable set of defaults for the allocator's
105 * debugging facilities.
106 */
107const char *
108_umem_debug_init()
109{
110	return ("default,verbose"); /* $UMEM_DEBUG setting */
111}
112
113const char *
114_umem_logging_init(void)
115{
116	return ("fail,contents"); /* $UMEM_LOGGING setting */
117}
118
119static void
120usage(void)
121{
122	(void) fprintf(stderr,
123	    "Usage: %s [-CmMdibcsDvhLXFPAG] [-t txg] [-e [-p path...]] "
124	    "[-U config] [-I inflight I/Os] [-x dumpdir] [-o var=value] "
125	    "poolname [object...]\n"
126	    "       %s [-divPA] [-e -p path...] [-U config] dataset "
127	    "[object...]\n"
128	    "       %s -mM [-LXFPA] [-t txg] [-e [-p path...]] [-U config] "
129	    "poolname [vdev [metaslab...]]\n"
130	    "       %s -R [-A] [-e [-p path...]] poolname "
131	    "vdev:offset:size[:flags]\n"
132	    "       %s -S [-PA] [-e [-p path...]] [-U config] poolname\n"
133	    "       %s -l [-Aqu] device\n"
134	    "       %s -C [-A] [-U config]\n\n",
135	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname);
136
137	(void) fprintf(stderr, "    Dataset name must include at least one "
138	    "separator character '/' or '@'\n");
139	(void) fprintf(stderr, "    If dataset name is specified, only that "
140	    "dataset is dumped\n");
141	(void) fprintf(stderr, "    If object numbers are specified, only "
142	    "those objects are dumped\n\n");
143	(void) fprintf(stderr, "    Options to control amount of output:\n");
144	(void) fprintf(stderr, "        -d dataset(s)\n");
145	(void) fprintf(stderr, "        -i intent logs\n");
146	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
147	(void) fprintf(stderr, "        -h pool history\n");
148	(void) fprintf(stderr, "        -b block statistics\n");
149	(void) fprintf(stderr, "        -m metaslabs\n");
150	(void) fprintf(stderr, "        -M metaslab groups\n");
151	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
152	    "all data) blocks\n");
153	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
154	(void) fprintf(stderr, "        -D dedup statistics\n");
155	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
156	(void) fprintf(stderr, "        -v verbose (applies to all others)\n");
157	(void) fprintf(stderr, "        -l read label contents\n");
158	(void) fprintf(stderr, "        -L disable leak tracking (do not "
159	    "load spacemaps)\n");
160	(void) fprintf(stderr, "        -R read and display block from a "
161	    "device\n\n");
162	(void) fprintf(stderr, "    Below options are intended for use "
163	    "with other options:\n");
164	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
165	    "panic recovery (-AA) or both (-AAA)\n");
166	(void) fprintf(stderr, "        -F attempt automatic rewind within "
167	    "safe range of transaction groups\n");
168	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
169	    "cachefile\n");
170	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
171	    "work with dataset)\n");
172	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
173	    "has altroot/not in a cachefile\n");
174	(void) fprintf(stderr, "        -p <path> -- use one or more with "
175	    "-e to specify path to vdev dir\n");
176	(void) fprintf(stderr, "        -x <dumpdir> -- "
177	    "dump all read blocks into specified directory\n");
178	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
179	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
180	    "searching for uberblocks\n");
181	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
182	    "specify the maximum number of "
183	    "checksumming I/Os [default is 200]\n");
184	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
185	    "exiting\n");
186	(void) fprintf(stderr, "        -o <variable>=<value> set global "
187	    "variable to an unsigned 32-bit integer value\n");
188	(void) fprintf(stderr, "        -q don't print label contents\n");
189	(void) fprintf(stderr, "        -u uberblock\n");
190	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
191	    "to make only that option verbose\n");
192	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
193	exit(1);
194}
195
196static void
197dump_debug_buffer()
198{
199	if (dump_opt['G']) {
200		(void) printf("\n");
201		zfs_dbgmsg_print("zdb");
202	}
203}
204
205/*
206 * Called for usage errors that are discovered after a call to spa_open(),
207 * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
208 */
209
210static void
211fatal(const char *fmt, ...)
212{
213	va_list ap;
214
215	va_start(ap, fmt);
216	(void) fprintf(stderr, "%s: ", cmdname);
217	(void) vfprintf(stderr, fmt, ap);
218	va_end(ap);
219	(void) fprintf(stderr, "\n");
220
221	dump_debug_buffer();
222
223	exit(1);
224}
225
226/* ARGSUSED */
227static void
228dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
229{
230	nvlist_t *nv;
231	size_t nvsize = *(uint64_t *)data;
232	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
233
234	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
235
236	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
237
238	umem_free(packed, nvsize);
239
240	dump_nvlist(nv, 8);
241
242	nvlist_free(nv);
243}
244
245/* ARGSUSED */
246static void
247dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
248{
249	spa_history_phys_t *shp = data;
250
251	if (shp == NULL)
252		return;
253
254	(void) printf("\t\tpool_create_len = %llu\n",
255	    (u_longlong_t)shp->sh_pool_create_len);
256	(void) printf("\t\tphys_max_off = %llu\n",
257	    (u_longlong_t)shp->sh_phys_max_off);
258	(void) printf("\t\tbof = %llu\n",
259	    (u_longlong_t)shp->sh_bof);
260	(void) printf("\t\teof = %llu\n",
261	    (u_longlong_t)shp->sh_eof);
262	(void) printf("\t\trecords_lost = %llu\n",
263	    (u_longlong_t)shp->sh_records_lost);
264}
265
266static void
267zdb_nicenum(uint64_t num, char *buf)
268{
269	if (dump_opt['P'])
270		(void) sprintf(buf, "%llu", (longlong_t)num);
271	else
272		nicenum(num, buf);
273}
274
275const char histo_stars[] = "****************************************";
276const int histo_width = sizeof (histo_stars) - 1;
277
278static void
279dump_histogram(const uint64_t *histo, int size, int offset)
280{
281	int i;
282	int minidx = size - 1;
283	int maxidx = 0;
284	uint64_t max = 0;
285
286	for (i = 0; i < size; i++) {
287		if (histo[i] > max)
288			max = histo[i];
289		if (histo[i] > 0 && i > maxidx)
290			maxidx = i;
291		if (histo[i] > 0 && i < minidx)
292			minidx = i;
293	}
294
295	if (max < histo_width)
296		max = histo_width;
297
298	for (i = minidx; i <= maxidx; i++) {
299		(void) printf("\t\t\t%3u: %6llu %s\n",
300		    i + offset, (u_longlong_t)histo[i],
301		    &histo_stars[(max - histo[i]) * histo_width / max]);
302	}
303}
304
305static void
306dump_zap_stats(objset_t *os, uint64_t object)
307{
308	int error;
309	zap_stats_t zs;
310
311	error = zap_get_stats(os, object, &zs);
312	if (error)
313		return;
314
315	if (zs.zs_ptrtbl_len == 0) {
316		ASSERT(zs.zs_num_blocks == 1);
317		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
318		    (u_longlong_t)zs.zs_blocksize,
319		    (u_longlong_t)zs.zs_num_entries);
320		return;
321	}
322
323	(void) printf("\tFat ZAP stats:\n");
324
325	(void) printf("\t\tPointer table:\n");
326	(void) printf("\t\t\t%llu elements\n",
327	    (u_longlong_t)zs.zs_ptrtbl_len);
328	(void) printf("\t\t\tzt_blk: %llu\n",
329	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
330	(void) printf("\t\t\tzt_numblks: %llu\n",
331	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
332	(void) printf("\t\t\tzt_shift: %llu\n",
333	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
334	(void) printf("\t\t\tzt_blks_copied: %llu\n",
335	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
336	(void) printf("\t\t\tzt_nextblk: %llu\n",
337	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
338
339	(void) printf("\t\tZAP entries: %llu\n",
340	    (u_longlong_t)zs.zs_num_entries);
341	(void) printf("\t\tLeaf blocks: %llu\n",
342	    (u_longlong_t)zs.zs_num_leafs);
343	(void) printf("\t\tTotal blocks: %llu\n",
344	    (u_longlong_t)zs.zs_num_blocks);
345	(void) printf("\t\tzap_block_type: 0x%llx\n",
346	    (u_longlong_t)zs.zs_block_type);
347	(void) printf("\t\tzap_magic: 0x%llx\n",
348	    (u_longlong_t)zs.zs_magic);
349	(void) printf("\t\tzap_salt: 0x%llx\n",
350	    (u_longlong_t)zs.zs_salt);
351
352	(void) printf("\t\tLeafs with 2^n pointers:\n");
353	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
354
355	(void) printf("\t\tBlocks with n*5 entries:\n");
356	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
357
358	(void) printf("\t\tBlocks n/10 full:\n");
359	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
360
361	(void) printf("\t\tEntries with n chunks:\n");
362	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
363
364	(void) printf("\t\tBuckets with n entries:\n");
365	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
366}
367
368/*ARGSUSED*/
369static void
370dump_none(objset_t *os, uint64_t object, void *data, size_t size)
371{
372}
373
374/*ARGSUSED*/
375static void
376dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
377{
378	(void) printf("\tUNKNOWN OBJECT TYPE\n");
379}
380
381/*ARGSUSED*/
382void
383dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
384{
385}
386
387/*ARGSUSED*/
388static void
389dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
390{
391}
392
393/*ARGSUSED*/
394static void
395dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
396{
397	zap_cursor_t zc;
398	zap_attribute_t attr;
399	void *prop;
400	int i;
401
402	dump_zap_stats(os, object);
403	(void) printf("\n");
404
405	for (zap_cursor_init(&zc, os, object);
406	    zap_cursor_retrieve(&zc, &attr) == 0;
407	    zap_cursor_advance(&zc)) {
408		(void) printf("\t\t%s = ", attr.za_name);
409		if (attr.za_num_integers == 0) {
410			(void) printf("\n");
411			continue;
412		}
413		prop = umem_zalloc(attr.za_num_integers *
414		    attr.za_integer_length, UMEM_NOFAIL);
415		(void) zap_lookup(os, object, attr.za_name,
416		    attr.za_integer_length, attr.za_num_integers, prop);
417		if (attr.za_integer_length == 1) {
418			(void) printf("%s", (char *)prop);
419		} else {
420			for (i = 0; i < attr.za_num_integers; i++) {
421				switch (attr.za_integer_length) {
422				case 2:
423					(void) printf("%u ",
424					    ((uint16_t *)prop)[i]);
425					break;
426				case 4:
427					(void) printf("%u ",
428					    ((uint32_t *)prop)[i]);
429					break;
430				case 8:
431					(void) printf("%lld ",
432					    (u_longlong_t)((int64_t *)prop)[i]);
433					break;
434				}
435			}
436		}
437		(void) printf("\n");
438		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
439	}
440	zap_cursor_fini(&zc);
441}
442
443static void
444dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
445{
446	bpobj_phys_t *bpop = data;
447	char bytes[32], comp[32], uncomp[32];
448
449	if (bpop == NULL)
450		return;
451
452	zdb_nicenum(bpop->bpo_bytes, bytes);
453	zdb_nicenum(bpop->bpo_comp, comp);
454	zdb_nicenum(bpop->bpo_uncomp, uncomp);
455
456	(void) printf("\t\tnum_blkptrs = %llu\n",
457	    (u_longlong_t)bpop->bpo_num_blkptrs);
458	(void) printf("\t\tbytes = %s\n", bytes);
459	if (size >= BPOBJ_SIZE_V1) {
460		(void) printf("\t\tcomp = %s\n", comp);
461		(void) printf("\t\tuncomp = %s\n", uncomp);
462	}
463	if (size >= sizeof (*bpop)) {
464		(void) printf("\t\tsubobjs = %llu\n",
465		    (u_longlong_t)bpop->bpo_subobjs);
466		(void) printf("\t\tnum_subobjs = %llu\n",
467		    (u_longlong_t)bpop->bpo_num_subobjs);
468	}
469
470	if (dump_opt['d'] < 5)
471		return;
472
473	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
474		char blkbuf[BP_SPRINTF_LEN];
475		blkptr_t bp;
476
477		int err = dmu_read(os, object,
478		    i * sizeof (bp), sizeof (bp), &bp, 0);
479		if (err != 0) {
480			(void) printf("got error %u from dmu_read\n", err);
481			break;
482		}
483		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
484		(void) printf("\t%s\n", blkbuf);
485	}
486}
487
488/* ARGSUSED */
489static void
490dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
491{
492	dmu_object_info_t doi;
493
494	VERIFY0(dmu_object_info(os, object, &doi));
495	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
496
497	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
498	if (err != 0) {
499		(void) printf("got error %u from dmu_read\n", err);
500		kmem_free(subobjs, doi.doi_max_offset);
501		return;
502	}
503
504	int64_t last_nonzero = -1;
505	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
506		if (subobjs[i] != 0)
507			last_nonzero = i;
508	}
509
510	for (int64_t i = 0; i <= last_nonzero; i++) {
511		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
512	}
513	kmem_free(subobjs, doi.doi_max_offset);
514}
515
516/*ARGSUSED*/
517static void
518dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
519{
520	dump_zap_stats(os, object);
521	/* contents are printed elsewhere, properly decoded */
522}
523
524/*ARGSUSED*/
525static void
526dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
527{
528	zap_cursor_t zc;
529	zap_attribute_t attr;
530
531	dump_zap_stats(os, object);
532	(void) printf("\n");
533
534	for (zap_cursor_init(&zc, os, object);
535	    zap_cursor_retrieve(&zc, &attr) == 0;
536	    zap_cursor_advance(&zc)) {
537		(void) printf("\t\t%s = ", attr.za_name);
538		if (attr.za_num_integers == 0) {
539			(void) printf("\n");
540			continue;
541		}
542		(void) printf(" %llx : [%d:%d:%d]\n",
543		    (u_longlong_t)attr.za_first_integer,
544		    (int)ATTR_LENGTH(attr.za_first_integer),
545		    (int)ATTR_BSWAP(attr.za_first_integer),
546		    (int)ATTR_NUM(attr.za_first_integer));
547	}
548	zap_cursor_fini(&zc);
549}
550
551/*ARGSUSED*/
552static void
553dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
554{
555	zap_cursor_t zc;
556	zap_attribute_t attr;
557	uint16_t *layout_attrs;
558	int i;
559
560	dump_zap_stats(os, object);
561	(void) printf("\n");
562
563	for (zap_cursor_init(&zc, os, object);
564	    zap_cursor_retrieve(&zc, &attr) == 0;
565	    zap_cursor_advance(&zc)) {
566		(void) printf("\t\t%s = [", attr.za_name);
567		if (attr.za_num_integers == 0) {
568			(void) printf("\n");
569			continue;
570		}
571
572		VERIFY(attr.za_integer_length == 2);
573		layout_attrs = umem_zalloc(attr.za_num_integers *
574		    attr.za_integer_length, UMEM_NOFAIL);
575
576		VERIFY(zap_lookup(os, object, attr.za_name,
577		    attr.za_integer_length,
578		    attr.za_num_integers, layout_attrs) == 0);
579
580		for (i = 0; i != attr.za_num_integers; i++)
581			(void) printf(" %d ", (int)layout_attrs[i]);
582		(void) printf("]\n");
583		umem_free(layout_attrs,
584		    attr.za_num_integers * attr.za_integer_length);
585	}
586	zap_cursor_fini(&zc);
587}
588
589/*ARGSUSED*/
590static void
591dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
592{
593	zap_cursor_t zc;
594	zap_attribute_t attr;
595	const char *typenames[] = {
596		/* 0 */ "not specified",
597		/* 1 */ "FIFO",
598		/* 2 */ "Character Device",
599		/* 3 */ "3 (invalid)",
600		/* 4 */ "Directory",
601		/* 5 */ "5 (invalid)",
602		/* 6 */ "Block Device",
603		/* 7 */ "7 (invalid)",
604		/* 8 */ "Regular File",
605		/* 9 */ "9 (invalid)",
606		/* 10 */ "Symbolic Link",
607		/* 11 */ "11 (invalid)",
608		/* 12 */ "Socket",
609		/* 13 */ "Door",
610		/* 14 */ "Event Port",
611		/* 15 */ "15 (invalid)",
612	};
613
614	dump_zap_stats(os, object);
615	(void) printf("\n");
616
617	for (zap_cursor_init(&zc, os, object);
618	    zap_cursor_retrieve(&zc, &attr) == 0;
619	    zap_cursor_advance(&zc)) {
620		(void) printf("\t\t%s = %lld (type: %s)\n",
621		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
622		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
623	}
624	zap_cursor_fini(&zc);
625}
626
627int
628get_dtl_refcount(vdev_t *vd)
629{
630	int refcount = 0;
631
632	if (vd->vdev_ops->vdev_op_leaf) {
633		space_map_t *sm = vd->vdev_dtl_sm;
634
635		if (sm != NULL &&
636		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
637			return (1);
638		return (0);
639	}
640
641	for (int c = 0; c < vd->vdev_children; c++)
642		refcount += get_dtl_refcount(vd->vdev_child[c]);
643	return (refcount);
644}
645
646int
647get_metaslab_refcount(vdev_t *vd)
648{
649	int refcount = 0;
650
651	if (vd->vdev_top == vd && !vd->vdev_removing) {
652		for (int m = 0; m < vd->vdev_ms_count; m++) {
653			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
654
655			if (sm != NULL &&
656			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
657				refcount++;
658		}
659	}
660	for (int c = 0; c < vd->vdev_children; c++)
661		refcount += get_metaslab_refcount(vd->vdev_child[c]);
662
663	return (refcount);
664}
665
666static int
667verify_spacemap_refcounts(spa_t *spa)
668{
669	uint64_t expected_refcount = 0;
670	uint64_t actual_refcount;
671
672	(void) feature_get_refcount(spa,
673	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
674	    &expected_refcount);
675	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
676	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
677
678	if (expected_refcount != actual_refcount) {
679		(void) printf("space map refcount mismatch: expected %lld != "
680		    "actual %lld\n",
681		    (longlong_t)expected_refcount,
682		    (longlong_t)actual_refcount);
683		return (2);
684	}
685	return (0);
686}
687
688static void
689dump_spacemap(objset_t *os, space_map_t *sm)
690{
691	uint64_t alloc, offset, entry;
692	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
693			    "INVALID", "INVALID", "INVALID", "INVALID" };
694
695	if (sm == NULL)
696		return;
697
698	/*
699	 * Print out the freelist entries in both encoded and decoded form.
700	 */
701	alloc = 0;
702	for (offset = 0; offset < space_map_length(sm);
703	    offset += sizeof (entry)) {
704		uint8_t mapshift = sm->sm_shift;
705
706		VERIFY0(dmu_read(os, space_map_object(sm), offset,
707		    sizeof (entry), &entry, DMU_READ_PREFETCH));
708		if (SM_DEBUG_DECODE(entry)) {
709
710			(void) printf("\t    [%6llu] %s: txg %llu, pass %llu\n",
711			    (u_longlong_t)(offset / sizeof (entry)),
712			    ddata[SM_DEBUG_ACTION_DECODE(entry)],
713			    (u_longlong_t)SM_DEBUG_TXG_DECODE(entry),
714			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(entry));
715		} else {
716			(void) printf("\t    [%6llu]    %c  range:"
717			    " %010llx-%010llx  size: %06llx\n",
718			    (u_longlong_t)(offset / sizeof (entry)),
719			    SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
720			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
721			    mapshift) + sm->sm_start),
722			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
723			    mapshift) + sm->sm_start +
724			    (SM_RUN_DECODE(entry) << mapshift)),
725			    (u_longlong_t)(SM_RUN_DECODE(entry) << mapshift));
726			if (SM_TYPE_DECODE(entry) == SM_ALLOC)
727				alloc += SM_RUN_DECODE(entry) << mapshift;
728			else
729				alloc -= SM_RUN_DECODE(entry) << mapshift;
730		}
731	}
732	if (alloc != space_map_allocated(sm)) {
733		(void) printf("space_map_object alloc (%llu) INCONSISTENT "
734		    "with space map summary (%llu)\n",
735		    (u_longlong_t)space_map_allocated(sm), (u_longlong_t)alloc);
736	}
737}
738
739static void
740dump_metaslab_stats(metaslab_t *msp)
741{
742	char maxbuf[32];
743	range_tree_t *rt = msp->ms_tree;
744	avl_tree_t *t = &msp->ms_size_tree;
745	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
746
747	zdb_nicenum(metaslab_block_maxsize(msp), maxbuf);
748
749	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
750	    "segments", avl_numnodes(t), "maxsize", maxbuf,
751	    "freepct", free_pct);
752	(void) printf("\tIn-memory histogram:\n");
753	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
754}
755
756static void
757dump_metaslab(metaslab_t *msp)
758{
759	vdev_t *vd = msp->ms_group->mg_vd;
760	spa_t *spa = vd->vdev_spa;
761	space_map_t *sm = msp->ms_sm;
762	char freebuf[32];
763
764	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf);
765
766	(void) printf(
767	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
768	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
769	    (u_longlong_t)space_map_object(sm), freebuf);
770
771	if (dump_opt['m'] > 2 && !dump_opt['L']) {
772		mutex_enter(&msp->ms_lock);
773		metaslab_load_wait(msp);
774		if (!msp->ms_loaded) {
775			VERIFY0(metaslab_load(msp));
776			range_tree_stat_verify(msp->ms_tree);
777		}
778		dump_metaslab_stats(msp);
779		metaslab_unload(msp);
780		mutex_exit(&msp->ms_lock);
781	}
782
783	if (dump_opt['m'] > 1 && sm != NULL &&
784	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
785		/*
786		 * The space map histogram represents free space in chunks
787		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
788		 */
789		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
790		    (u_longlong_t)msp->ms_fragmentation);
791		dump_histogram(sm->sm_phys->smp_histogram,
792		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
793	}
794
795	if (dump_opt['d'] > 5 || dump_opt['m'] > 3) {
796		ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
797
798		mutex_enter(&msp->ms_lock);
799		dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
800		mutex_exit(&msp->ms_lock);
801	}
802}
803
804static void
805print_vdev_metaslab_header(vdev_t *vd)
806{
807	(void) printf("\tvdev %10llu\n\t%-10s%5llu   %-19s   %-15s   %-10s\n",
808	    (u_longlong_t)vd->vdev_id,
809	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
810	    "offset", "spacemap", "free");
811	(void) printf("\t%15s   %19s   %15s   %10s\n",
812	    "---------------", "-------------------",
813	    "---------------", "-------------");
814}
815
816static void
817dump_metaslab_groups(spa_t *spa)
818{
819	vdev_t *rvd = spa->spa_root_vdev;
820	metaslab_class_t *mc = spa_normal_class(spa);
821	uint64_t fragmentation;
822
823	metaslab_class_histogram_verify(mc);
824
825	for (int c = 0; c < rvd->vdev_children; c++) {
826		vdev_t *tvd = rvd->vdev_child[c];
827		metaslab_group_t *mg = tvd->vdev_mg;
828
829		if (mg->mg_class != mc)
830			continue;
831
832		metaslab_group_histogram_verify(mg);
833		mg->mg_fragmentation = metaslab_group_fragmentation(mg);
834
835		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
836		    "fragmentation",
837		    (u_longlong_t)tvd->vdev_id,
838		    (u_longlong_t)tvd->vdev_ms_count);
839		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
840			(void) printf("%3s\n", "-");
841		} else {
842			(void) printf("%3llu%%\n",
843			    (u_longlong_t)mg->mg_fragmentation);
844		}
845		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
846	}
847
848	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
849	fragmentation = metaslab_class_fragmentation(mc);
850	if (fragmentation == ZFS_FRAG_INVALID)
851		(void) printf("\t%3s\n", "-");
852	else
853		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
854	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
855}
856
857static void
858dump_metaslabs(spa_t *spa)
859{
860	vdev_t *vd, *rvd = spa->spa_root_vdev;
861	uint64_t m, c = 0, children = rvd->vdev_children;
862
863	(void) printf("\nMetaslabs:\n");
864
865	if (!dump_opt['d'] && zopt_objects > 0) {
866		c = zopt_object[0];
867
868		if (c >= children)
869			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
870
871		if (zopt_objects > 1) {
872			vd = rvd->vdev_child[c];
873			print_vdev_metaslab_header(vd);
874
875			for (m = 1; m < zopt_objects; m++) {
876				if (zopt_object[m] < vd->vdev_ms_count)
877					dump_metaslab(
878					    vd->vdev_ms[zopt_object[m]]);
879				else
880					(void) fprintf(stderr, "bad metaslab "
881					    "number %llu\n",
882					    (u_longlong_t)zopt_object[m]);
883			}
884			(void) printf("\n");
885			return;
886		}
887		children = c + 1;
888	}
889	for (; c < children; c++) {
890		vd = rvd->vdev_child[c];
891		print_vdev_metaslab_header(vd);
892
893		for (m = 0; m < vd->vdev_ms_count; m++)
894			dump_metaslab(vd->vdev_ms[m]);
895		(void) printf("\n");
896	}
897}
898
899static void
900dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
901{
902	const ddt_phys_t *ddp = dde->dde_phys;
903	const ddt_key_t *ddk = &dde->dde_key;
904	char *types[4] = { "ditto", "single", "double", "triple" };
905	char blkbuf[BP_SPRINTF_LEN];
906	blkptr_t blk;
907
908	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
909		if (ddp->ddp_phys_birth == 0)
910			continue;
911		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
912		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
913		(void) printf("index %llx refcnt %llu %s %s\n",
914		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
915		    types[p], blkbuf);
916	}
917}
918
919static void
920dump_dedup_ratio(const ddt_stat_t *dds)
921{
922	double rL, rP, rD, D, dedup, compress, copies;
923
924	if (dds->dds_blocks == 0)
925		return;
926
927	rL = (double)dds->dds_ref_lsize;
928	rP = (double)dds->dds_ref_psize;
929	rD = (double)dds->dds_ref_dsize;
930	D = (double)dds->dds_dsize;
931
932	dedup = rD / D;
933	compress = rL / rP;
934	copies = rD / rP;
935
936	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
937	    "dedup * compress / copies = %.2f\n\n",
938	    dedup, compress, copies, dedup * compress / copies);
939}
940
941static void
942dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
943{
944	char name[DDT_NAMELEN];
945	ddt_entry_t dde;
946	uint64_t walk = 0;
947	dmu_object_info_t doi;
948	uint64_t count, dspace, mspace;
949	int error;
950
951	error = ddt_object_info(ddt, type, class, &doi);
952
953	if (error == ENOENT)
954		return;
955	ASSERT(error == 0);
956
957	if ((count = ddt_object_count(ddt, type, class)) == 0)
958		return;
959
960	dspace = doi.doi_physical_blocks_512 << 9;
961	mspace = doi.doi_fill_count * doi.doi_data_block_size;
962
963	ddt_object_name(ddt, type, class, name);
964
965	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
966	    name,
967	    (u_longlong_t)count,
968	    (u_longlong_t)(dspace / count),
969	    (u_longlong_t)(mspace / count));
970
971	if (dump_opt['D'] < 3)
972		return;
973
974	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
975
976	if (dump_opt['D'] < 4)
977		return;
978
979	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
980		return;
981
982	(void) printf("%s contents:\n\n", name);
983
984	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
985		dump_dde(ddt, &dde, walk);
986
987	ASSERT(error == ENOENT);
988
989	(void) printf("\n");
990}
991
992static void
993dump_all_ddts(spa_t *spa)
994{
995	ddt_histogram_t ddh_total = { 0 };
996	ddt_stat_t dds_total = { 0 };
997
998	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
999		ddt_t *ddt = spa->spa_ddt[c];
1000		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
1001			for (enum ddt_class class = 0; class < DDT_CLASSES;
1002			    class++) {
1003				dump_ddt(ddt, type, class);
1004			}
1005		}
1006	}
1007
1008	ddt_get_dedup_stats(spa, &dds_total);
1009
1010	if (dds_total.dds_blocks == 0) {
1011		(void) printf("All DDTs are empty\n");
1012		return;
1013	}
1014
1015	(void) printf("\n");
1016
1017	if (dump_opt['D'] > 1) {
1018		(void) printf("DDT histogram (aggregated over all DDTs):\n");
1019		ddt_get_dedup_histogram(spa, &ddh_total);
1020		zpool_dump_ddt(&dds_total, &ddh_total);
1021	}
1022
1023	dump_dedup_ratio(&dds_total);
1024}
1025
1026static void
1027dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1028{
1029	char *prefix = arg;
1030
1031	(void) printf("%s [%llu,%llu) length %llu\n",
1032	    prefix,
1033	    (u_longlong_t)start,
1034	    (u_longlong_t)(start + size),
1035	    (u_longlong_t)(size));
1036}
1037
1038static void
1039dump_dtl(vdev_t *vd, int indent)
1040{
1041	spa_t *spa = vd->vdev_spa;
1042	boolean_t required;
1043	char *name[DTL_TYPES] = { "missing", "partial", "scrub", "outage" };
1044	char prefix[256];
1045
1046	spa_vdev_state_enter(spa, SCL_NONE);
1047	required = vdev_dtl_required(vd);
1048	(void) spa_vdev_state_exit(spa, NULL, 0);
1049
1050	if (indent == 0)
1051		(void) printf("\nDirty time logs:\n\n");
1052
1053	(void) printf("\t%*s%s [%s]\n", indent, "",
1054	    vd->vdev_path ? vd->vdev_path :
1055	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1056	    required ? "DTL-required" : "DTL-expendable");
1057
1058	for (int t = 0; t < DTL_TYPES; t++) {
1059		range_tree_t *rt = vd->vdev_dtl[t];
1060		if (range_tree_space(rt) == 0)
1061			continue;
1062		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1063		    indent + 2, "", name[t]);
1064		mutex_enter(rt->rt_lock);
1065		range_tree_walk(rt, dump_dtl_seg, prefix);
1066		mutex_exit(rt->rt_lock);
1067		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1068			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1069	}
1070
1071	for (int c = 0; c < vd->vdev_children; c++)
1072		dump_dtl(vd->vdev_child[c], indent + 4);
1073}
1074
1075static void
1076dump_history(spa_t *spa)
1077{
1078	nvlist_t **events = NULL;
1079	uint64_t resid, len, off = 0;
1080	uint_t num = 0;
1081	int error;
1082	time_t tsec;
1083	struct tm t;
1084	char tbuf[30];
1085	char internalstr[MAXPATHLEN];
1086
1087	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
1088	do {
1089		len = SPA_MAXBLOCKSIZE;
1090
1091		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1092			(void) fprintf(stderr, "Unable to read history: "
1093			    "error %d\n", error);
1094			umem_free(buf, SPA_MAXBLOCKSIZE);
1095			return;
1096		}
1097
1098		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1099			break;
1100
1101		off -= resid;
1102	} while (len != 0);
1103	umem_free(buf, SPA_MAXBLOCKSIZE);
1104
1105	(void) printf("\nHistory:\n");
1106	for (int i = 0; i < num; i++) {
1107		uint64_t time, txg, ievent;
1108		char *cmd, *intstr;
1109		boolean_t printed = B_FALSE;
1110
1111		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1112		    &time) != 0)
1113			goto next;
1114		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1115		    &cmd) != 0) {
1116			if (nvlist_lookup_uint64(events[i],
1117			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1118				goto next;
1119			verify(nvlist_lookup_uint64(events[i],
1120			    ZPOOL_HIST_TXG, &txg) == 0);
1121			verify(nvlist_lookup_string(events[i],
1122			    ZPOOL_HIST_INT_STR, &intstr) == 0);
1123			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1124				goto next;
1125
1126			(void) snprintf(internalstr,
1127			    sizeof (internalstr),
1128			    "[internal %s txg:%lld] %s",
1129			    zfs_history_event_names[ievent], txg,
1130			    intstr);
1131			cmd = internalstr;
1132		}
1133		tsec = time;
1134		(void) localtime_r(&tsec, &t);
1135		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1136		(void) printf("%s %s\n", tbuf, cmd);
1137		printed = B_TRUE;
1138
1139next:
1140		if (dump_opt['h'] > 1) {
1141			if (!printed)
1142				(void) printf("unrecognized record:\n");
1143			dump_nvlist(events[i], 2);
1144		}
1145	}
1146}
1147
1148/*ARGSUSED*/
1149static void
1150dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1151{
1152}
1153
1154static uint64_t
1155blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1156    const zbookmark_phys_t *zb)
1157{
1158	if (dnp == NULL) {
1159		ASSERT(zb->zb_level < 0);
1160		if (zb->zb_object == 0)
1161			return (zb->zb_blkid);
1162		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1163	}
1164
1165	ASSERT(zb->zb_level >= 0);
1166
1167	return ((zb->zb_blkid <<
1168	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1169	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1170}
1171
1172static void
1173snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1174{
1175	const dva_t *dva = bp->blk_dva;
1176	int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1177
1178	if (dump_opt['b'] >= 6) {
1179		snprintf_blkptr(blkbuf, buflen, bp);
1180		return;
1181	}
1182
1183	if (BP_IS_EMBEDDED(bp)) {
1184		(void) sprintf(blkbuf,
1185		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
1186		    (int)BPE_GET_ETYPE(bp),
1187		    (u_longlong_t)BPE_GET_LSIZE(bp),
1188		    (u_longlong_t)BPE_GET_PSIZE(bp),
1189		    (u_longlong_t)bp->blk_birth);
1190		return;
1191	}
1192
1193	blkbuf[0] = '\0';
1194	for (int i = 0; i < ndvas; i++)
1195		(void) snprintf(blkbuf + strlen(blkbuf),
1196		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1197		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1198		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1199		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1200
1201	if (BP_IS_HOLE(bp)) {
1202		(void) snprintf(blkbuf + strlen(blkbuf),
1203		    buflen - strlen(blkbuf),
1204		    "%llxL B=%llu",
1205		    (u_longlong_t)BP_GET_LSIZE(bp),
1206		    (u_longlong_t)bp->blk_birth);
1207	} else {
1208		(void) snprintf(blkbuf + strlen(blkbuf),
1209		    buflen - strlen(blkbuf),
1210		    "%llxL/%llxP F=%llu B=%llu/%llu",
1211		    (u_longlong_t)BP_GET_LSIZE(bp),
1212		    (u_longlong_t)BP_GET_PSIZE(bp),
1213		    (u_longlong_t)BP_GET_FILL(bp),
1214		    (u_longlong_t)bp->blk_birth,
1215		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1216	}
1217}
1218
1219static void
1220print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1221    const dnode_phys_t *dnp)
1222{
1223	char blkbuf[BP_SPRINTF_LEN];
1224	int l;
1225
1226	if (!BP_IS_EMBEDDED(bp)) {
1227		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1228		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1229	}
1230
1231	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1232
1233	ASSERT(zb->zb_level >= 0);
1234
1235	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1236		if (l == zb->zb_level) {
1237			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1238		} else {
1239			(void) printf(" ");
1240		}
1241	}
1242
1243	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1244	(void) printf("%s\n", blkbuf);
1245}
1246
1247static int
1248visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1249    blkptr_t *bp, const zbookmark_phys_t *zb)
1250{
1251	int err = 0;
1252
1253	if (bp->blk_birth == 0)
1254		return (0);
1255
1256	print_indirect(bp, zb, dnp);
1257
1258	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1259		arc_flags_t flags = ARC_FLAG_WAIT;
1260		int i;
1261		blkptr_t *cbp;
1262		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1263		arc_buf_t *buf;
1264		uint64_t fill = 0;
1265
1266		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1267		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1268		if (err)
1269			return (err);
1270		ASSERT(buf->b_data);
1271
1272		/* recursively visit blocks below this */
1273		cbp = buf->b_data;
1274		for (i = 0; i < epb; i++, cbp++) {
1275			zbookmark_phys_t czb;
1276
1277			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1278			    zb->zb_level - 1,
1279			    zb->zb_blkid * epb + i);
1280			err = visit_indirect(spa, dnp, cbp, &czb);
1281			if (err)
1282				break;
1283			fill += BP_GET_FILL(cbp);
1284		}
1285		if (!err)
1286			ASSERT3U(fill, ==, BP_GET_FILL(bp));
1287		arc_buf_destroy(buf, &buf);
1288	}
1289
1290	return (err);
1291}
1292
1293/*ARGSUSED*/
1294static void
1295dump_indirect(dnode_t *dn)
1296{
1297	dnode_phys_t *dnp = dn->dn_phys;
1298	int j;
1299	zbookmark_phys_t czb;
1300
1301	(void) printf("Indirect blocks:\n");
1302
1303	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1304	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1305	for (j = 0; j < dnp->dn_nblkptr; j++) {
1306		czb.zb_blkid = j;
1307		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1308		    &dnp->dn_blkptr[j], &czb);
1309	}
1310
1311	(void) printf("\n");
1312}
1313
1314/*ARGSUSED*/
1315static void
1316dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1317{
1318	dsl_dir_phys_t *dd = data;
1319	time_t crtime;
1320	char nice[32];
1321
1322	if (dd == NULL)
1323		return;
1324
1325	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1326
1327	crtime = dd->dd_creation_time;
1328	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1329	(void) printf("\t\thead_dataset_obj = %llu\n",
1330	    (u_longlong_t)dd->dd_head_dataset_obj);
1331	(void) printf("\t\tparent_dir_obj = %llu\n",
1332	    (u_longlong_t)dd->dd_parent_obj);
1333	(void) printf("\t\torigin_obj = %llu\n",
1334	    (u_longlong_t)dd->dd_origin_obj);
1335	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1336	    (u_longlong_t)dd->dd_child_dir_zapobj);
1337	zdb_nicenum(dd->dd_used_bytes, nice);
1338	(void) printf("\t\tused_bytes = %s\n", nice);
1339	zdb_nicenum(dd->dd_compressed_bytes, nice);
1340	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1341	zdb_nicenum(dd->dd_uncompressed_bytes, nice);
1342	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1343	zdb_nicenum(dd->dd_quota, nice);
1344	(void) printf("\t\tquota = %s\n", nice);
1345	zdb_nicenum(dd->dd_reserved, nice);
1346	(void) printf("\t\treserved = %s\n", nice);
1347	(void) printf("\t\tprops_zapobj = %llu\n",
1348	    (u_longlong_t)dd->dd_props_zapobj);
1349	(void) printf("\t\tdeleg_zapobj = %llu\n",
1350	    (u_longlong_t)dd->dd_deleg_zapobj);
1351	(void) printf("\t\tflags = %llx\n",
1352	    (u_longlong_t)dd->dd_flags);
1353
1354#define	DO(which) \
1355	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice); \
1356	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1357	DO(HEAD);
1358	DO(SNAP);
1359	DO(CHILD);
1360	DO(CHILD_RSRV);
1361	DO(REFRSRV);
1362#undef DO
1363}
1364
1365/*ARGSUSED*/
1366static void
1367dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1368{
1369	dsl_dataset_phys_t *ds = data;
1370	time_t crtime;
1371	char used[32], compressed[32], uncompressed[32], unique[32];
1372	char blkbuf[BP_SPRINTF_LEN];
1373
1374	if (ds == NULL)
1375		return;
1376
1377	ASSERT(size == sizeof (*ds));
1378	crtime = ds->ds_creation_time;
1379	zdb_nicenum(ds->ds_referenced_bytes, used);
1380	zdb_nicenum(ds->ds_compressed_bytes, compressed);
1381	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed);
1382	zdb_nicenum(ds->ds_unique_bytes, unique);
1383	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1384
1385	(void) printf("\t\tdir_obj = %llu\n",
1386	    (u_longlong_t)ds->ds_dir_obj);
1387	(void) printf("\t\tprev_snap_obj = %llu\n",
1388	    (u_longlong_t)ds->ds_prev_snap_obj);
1389	(void) printf("\t\tprev_snap_txg = %llu\n",
1390	    (u_longlong_t)ds->ds_prev_snap_txg);
1391	(void) printf("\t\tnext_snap_obj = %llu\n",
1392	    (u_longlong_t)ds->ds_next_snap_obj);
1393	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1394	    (u_longlong_t)ds->ds_snapnames_zapobj);
1395	(void) printf("\t\tnum_children = %llu\n",
1396	    (u_longlong_t)ds->ds_num_children);
1397	(void) printf("\t\tuserrefs_obj = %llu\n",
1398	    (u_longlong_t)ds->ds_userrefs_obj);
1399	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1400	(void) printf("\t\tcreation_txg = %llu\n",
1401	    (u_longlong_t)ds->ds_creation_txg);
1402	(void) printf("\t\tdeadlist_obj = %llu\n",
1403	    (u_longlong_t)ds->ds_deadlist_obj);
1404	(void) printf("\t\tused_bytes = %s\n", used);
1405	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1406	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1407	(void) printf("\t\tunique = %s\n", unique);
1408	(void) printf("\t\tfsid_guid = %llu\n",
1409	    (u_longlong_t)ds->ds_fsid_guid);
1410	(void) printf("\t\tguid = %llu\n",
1411	    (u_longlong_t)ds->ds_guid);
1412	(void) printf("\t\tflags = %llx\n",
1413	    (u_longlong_t)ds->ds_flags);
1414	(void) printf("\t\tnext_clones_obj = %llu\n",
1415	    (u_longlong_t)ds->ds_next_clones_obj);
1416	(void) printf("\t\tprops_obj = %llu\n",
1417	    (u_longlong_t)ds->ds_props_obj);
1418	(void) printf("\t\tbp = %s\n", blkbuf);
1419}
1420
1421/* ARGSUSED */
1422static int
1423dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1424{
1425	char blkbuf[BP_SPRINTF_LEN];
1426
1427	if (bp->blk_birth != 0) {
1428		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1429		(void) printf("\t%s\n", blkbuf);
1430	}
1431	return (0);
1432}
1433
1434static void
1435dump_bptree(objset_t *os, uint64_t obj, char *name)
1436{
1437	char bytes[32];
1438	bptree_phys_t *bt;
1439	dmu_buf_t *db;
1440
1441	if (dump_opt['d'] < 3)
1442		return;
1443
1444	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1445	bt = db->db_data;
1446	zdb_nicenum(bt->bt_bytes, bytes);
1447	(void) printf("\n    %s: %llu datasets, %s\n",
1448	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1449	dmu_buf_rele(db, FTAG);
1450
1451	if (dump_opt['d'] < 5)
1452		return;
1453
1454	(void) printf("\n");
1455
1456	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1457}
1458
1459/* ARGSUSED */
1460static int
1461dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1462{
1463	char blkbuf[BP_SPRINTF_LEN];
1464
1465	ASSERT(bp->blk_birth != 0);
1466	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1467	(void) printf("\t%s\n", blkbuf);
1468	return (0);
1469}
1470
1471static void
1472dump_full_bpobj(bpobj_t *bpo, char *name, int indent)
1473{
1474	char bytes[32];
1475	char comp[32];
1476	char uncomp[32];
1477
1478	if (dump_opt['d'] < 3)
1479		return;
1480
1481	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes);
1482	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1483		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp);
1484		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp);
1485		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1486		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1487		    indent * 8, name,
1488		    (u_longlong_t)bpo->bpo_object,
1489		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1490		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1491		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1492		    bytes, comp, uncomp);
1493
1494		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1495			uint64_t subobj;
1496			bpobj_t subbpo;
1497			int error;
1498			VERIFY0(dmu_read(bpo->bpo_os,
1499			    bpo->bpo_phys->bpo_subobjs,
1500			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1501			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1502			if (error != 0) {
1503				(void) printf("ERROR %u while trying to open "
1504				    "subobj id %llu\n",
1505				    error, (u_longlong_t)subobj);
1506				continue;
1507			}
1508			dump_full_bpobj(&subbpo, "subobj", indent + 1);
1509			bpobj_close(&subbpo);
1510		}
1511	} else {
1512		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1513		    indent * 8, name,
1514		    (u_longlong_t)bpo->bpo_object,
1515		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1516		    bytes);
1517	}
1518
1519	if (dump_opt['d'] < 5)
1520		return;
1521
1522
1523	if (indent == 0) {
1524		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1525		(void) printf("\n");
1526	}
1527}
1528
1529static void
1530dump_deadlist(dsl_deadlist_t *dl)
1531{
1532	dsl_deadlist_entry_t *dle;
1533	uint64_t unused;
1534	char bytes[32];
1535	char comp[32];
1536	char uncomp[32];
1537
1538	if (dump_opt['d'] < 3)
1539		return;
1540
1541	if (dl->dl_oldfmt) {
1542		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1543		return;
1544	}
1545
1546	zdb_nicenum(dl->dl_phys->dl_used, bytes);
1547	zdb_nicenum(dl->dl_phys->dl_comp, comp);
1548	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp);
1549	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1550	    bytes, comp, uncomp);
1551
1552	if (dump_opt['d'] < 4)
1553		return;
1554
1555	(void) printf("\n");
1556
1557	/* force the tree to be loaded */
1558	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1559
1560	for (dle = avl_first(&dl->dl_tree); dle;
1561	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1562		if (dump_opt['d'] >= 5) {
1563			char buf[128];
1564			(void) snprintf(buf, sizeof (buf), "mintxg %llu -> ",
1565			    (longlong_t)dle->dle_mintxg,
1566			    (longlong_t)dle->dle_bpobj.bpo_object);
1567
1568			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1569		} else {
1570			(void) printf("mintxg %llu -> obj %llu\n",
1571			    (longlong_t)dle->dle_mintxg,
1572			    (longlong_t)dle->dle_bpobj.bpo_object);
1573
1574		}
1575	}
1576}
1577
1578static avl_tree_t idx_tree;
1579static avl_tree_t domain_tree;
1580static boolean_t fuid_table_loaded;
1581static boolean_t sa_loaded;
1582sa_attr_type_t *sa_attr_table;
1583
1584static void
1585fuid_table_destroy()
1586{
1587	if (fuid_table_loaded) {
1588		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1589		fuid_table_loaded = B_FALSE;
1590	}
1591}
1592
1593/*
1594 * print uid or gid information.
1595 * For normal POSIX id just the id is printed in decimal format.
1596 * For CIFS files with FUID the fuid is printed in hex followed by
1597 * the domain-rid string.
1598 */
1599static void
1600print_idstr(uint64_t id, const char *id_type)
1601{
1602	if (FUID_INDEX(id)) {
1603		char *domain;
1604
1605		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1606		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1607		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1608	} else {
1609		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1610	}
1611
1612}
1613
1614static void
1615dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1616{
1617	uint32_t uid_idx, gid_idx;
1618
1619	uid_idx = FUID_INDEX(uid);
1620	gid_idx = FUID_INDEX(gid);
1621
1622	/* Load domain table, if not already loaded */
1623	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1624		uint64_t fuid_obj;
1625
1626		/* first find the fuid object.  It lives in the master node */
1627		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1628		    8, 1, &fuid_obj) == 0);
1629		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1630		(void) zfs_fuid_table_load(os, fuid_obj,
1631		    &idx_tree, &domain_tree);
1632		fuid_table_loaded = B_TRUE;
1633	}
1634
1635	print_idstr(uid, "uid");
1636	print_idstr(gid, "gid");
1637}
1638
1639/*ARGSUSED*/
1640static void
1641dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1642{
1643	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
1644	sa_handle_t *hdl;
1645	uint64_t xattr, rdev, gen;
1646	uint64_t uid, gid, mode, fsize, parent, links;
1647	uint64_t pflags;
1648	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1649	time_t z_crtime, z_atime, z_mtime, z_ctime;
1650	sa_bulk_attr_t bulk[12];
1651	int idx = 0;
1652	int error;
1653
1654	if (!sa_loaded) {
1655		uint64_t sa_attrs = 0;
1656		uint64_t version;
1657
1658		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1659		    8, 1, &version) == 0);
1660		if (version >= ZPL_VERSION_SA) {
1661			VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1662			    8, 1, &sa_attrs) == 0);
1663		}
1664		if ((error = sa_setup(os, sa_attrs, zfs_attr_table,
1665		    ZPL_END, &sa_attr_table)) != 0) {
1666			(void) printf("sa_setup failed errno %d, can't "
1667			    "display znode contents\n", error);
1668			return;
1669		}
1670		sa_loaded = B_TRUE;
1671	}
1672
1673	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1674		(void) printf("Failed to get handle for SA znode\n");
1675		return;
1676	}
1677
1678	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1679	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1680	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1681	    &links, 8);
1682	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1683	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1684	    &mode, 8);
1685	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1686	    NULL, &parent, 8);
1687	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
1688	    &fsize, 8);
1689	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
1690	    acctm, 16);
1691	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
1692	    modtm, 16);
1693	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
1694	    crtm, 16);
1695	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
1696	    chgtm, 16);
1697	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
1698	    &pflags, 8);
1699
1700	if (sa_bulk_lookup(hdl, bulk, idx)) {
1701		(void) sa_handle_destroy(hdl);
1702		return;
1703	}
1704
1705	error = zfs_obj_to_path(os, object, path, sizeof (path));
1706	if (error != 0) {
1707		(void) snprintf(path, sizeof (path), "\?\?\?<object#%llu>",
1708		    (u_longlong_t)object);
1709	}
1710	if (dump_opt['d'] < 3) {
1711		(void) printf("\t%s\n", path);
1712		(void) sa_handle_destroy(hdl);
1713		return;
1714	}
1715
1716	z_crtime = (time_t)crtm[0];
1717	z_atime = (time_t)acctm[0];
1718	z_mtime = (time_t)modtm[0];
1719	z_ctime = (time_t)chgtm[0];
1720
1721	(void) printf("\tpath	%s\n", path);
1722	dump_uidgid(os, uid, gid);
1723	(void) printf("\tatime	%s", ctime(&z_atime));
1724	(void) printf("\tmtime	%s", ctime(&z_mtime));
1725	(void) printf("\tctime	%s", ctime(&z_ctime));
1726	(void) printf("\tcrtime	%s", ctime(&z_crtime));
1727	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
1728	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
1729	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
1730	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
1731	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
1732	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
1733	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
1734	    sizeof (uint64_t)) == 0)
1735		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
1736	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
1737	    sizeof (uint64_t)) == 0)
1738		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
1739	sa_handle_destroy(hdl);
1740}
1741
1742/*ARGSUSED*/
1743static void
1744dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
1745{
1746}
1747
1748/*ARGSUSED*/
1749static void
1750dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
1751{
1752}
1753
1754static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
1755	dump_none,		/* unallocated			*/
1756	dump_zap,		/* object directory		*/
1757	dump_uint64,		/* object array			*/
1758	dump_none,		/* packed nvlist		*/
1759	dump_packed_nvlist,	/* packed nvlist size		*/
1760	dump_none,		/* bpobj			*/
1761	dump_bpobj,		/* bpobj header			*/
1762	dump_none,		/* SPA space map header		*/
1763	dump_none,		/* SPA space map		*/
1764	dump_none,		/* ZIL intent log		*/
1765	dump_dnode,		/* DMU dnode			*/
1766	dump_dmu_objset,	/* DMU objset			*/
1767	dump_dsl_dir,		/* DSL directory		*/
1768	dump_zap,		/* DSL directory child map	*/
1769	dump_zap,		/* DSL dataset snap map		*/
1770	dump_zap,		/* DSL props			*/
1771	dump_dsl_dataset,	/* DSL dataset			*/
1772	dump_znode,		/* ZFS znode			*/
1773	dump_acl,		/* ZFS V0 ACL			*/
1774	dump_uint8,		/* ZFS plain file		*/
1775	dump_zpldir,		/* ZFS directory		*/
1776	dump_zap,		/* ZFS master node		*/
1777	dump_zap,		/* ZFS delete queue		*/
1778	dump_uint8,		/* zvol object			*/
1779	dump_zap,		/* zvol prop			*/
1780	dump_uint8,		/* other uint8[]		*/
1781	dump_uint64,		/* other uint64[]		*/
1782	dump_zap,		/* other ZAP			*/
1783	dump_zap,		/* persistent error log		*/
1784	dump_uint8,		/* SPA history			*/
1785	dump_history_offsets,	/* SPA history offsets		*/
1786	dump_zap,		/* Pool properties		*/
1787	dump_zap,		/* DSL permissions		*/
1788	dump_acl,		/* ZFS ACL			*/
1789	dump_uint8,		/* ZFS SYSACL			*/
1790	dump_none,		/* FUID nvlist			*/
1791	dump_packed_nvlist,	/* FUID nvlist size		*/
1792	dump_zap,		/* DSL dataset next clones	*/
1793	dump_zap,		/* DSL scrub queue		*/
1794	dump_zap,		/* ZFS user/group used		*/
1795	dump_zap,		/* ZFS user/group quota		*/
1796	dump_zap,		/* snapshot refcount tags	*/
1797	dump_ddt_zap,		/* DDT ZAP object		*/
1798	dump_zap,		/* DDT statistics		*/
1799	dump_znode,		/* SA object			*/
1800	dump_zap,		/* SA Master Node		*/
1801	dump_sa_attrs,		/* SA attribute registration	*/
1802	dump_sa_layouts,	/* SA attribute layouts		*/
1803	dump_zap,		/* DSL scrub translations	*/
1804	dump_none,		/* fake dedup BP		*/
1805	dump_zap,		/* deadlist			*/
1806	dump_none,		/* deadlist hdr			*/
1807	dump_zap,		/* dsl clones			*/
1808	dump_bpobj_subobjs,	/* bpobj subobjs		*/
1809	dump_unknown,		/* Unknown type, must be last	*/
1810};
1811
1812static void
1813dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
1814{
1815	dmu_buf_t *db = NULL;
1816	dmu_object_info_t doi;
1817	dnode_t *dn;
1818	void *bonus = NULL;
1819	size_t bsize = 0;
1820	char iblk[32], dblk[32], lsize[32], asize[32], fill[32];
1821	char bonus_size[32];
1822	char aux[50];
1823	int error;
1824
1825	if (*print_header) {
1826		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
1827		    "Object", "lvl", "iblk", "dblk", "dsize", "lsize",
1828		    "%full", "type");
1829		*print_header = 0;
1830	}
1831
1832	if (object == 0) {
1833		dn = DMU_META_DNODE(os);
1834	} else {
1835		error = dmu_bonus_hold(os, object, FTAG, &db);
1836		if (error)
1837			fatal("dmu_bonus_hold(%llu) failed, errno %u",
1838			    object, error);
1839		bonus = db->db_data;
1840		bsize = db->db_size;
1841		dn = DB_DNODE((dmu_buf_impl_t *)db);
1842	}
1843	dmu_object_info_from_dnode(dn, &doi);
1844
1845	zdb_nicenum(doi.doi_metadata_block_size, iblk);
1846	zdb_nicenum(doi.doi_data_block_size, dblk);
1847	zdb_nicenum(doi.doi_max_offset, lsize);
1848	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize);
1849	zdb_nicenum(doi.doi_bonus_size, bonus_size);
1850	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
1851	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
1852	    doi.doi_max_offset);
1853
1854	aux[0] = '\0';
1855
1856	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
1857		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
1858		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
1859	}
1860
1861	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
1862		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
1863		    ZDB_COMPRESS_NAME(doi.doi_compress));
1864	}
1865
1866	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %6s  %s%s\n",
1867	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk,
1868	    asize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
1869
1870	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
1871		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
1872		    "", "", "", "", "", bonus_size, "bonus",
1873		    ZDB_OT_NAME(doi.doi_bonus_type));
1874	}
1875
1876	if (verbosity >= 4) {
1877		(void) printf("\tdnode flags: %s%s%s\n",
1878		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
1879		    "USED_BYTES " : "",
1880		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
1881		    "USERUSED_ACCOUNTED " : "",
1882		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
1883		    "SPILL_BLKPTR" : "");
1884		(void) printf("\tdnode maxblkid: %llu\n",
1885		    (longlong_t)dn->dn_phys->dn_maxblkid);
1886
1887		object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
1888		    bonus, bsize);
1889		object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
1890		*print_header = 1;
1891	}
1892
1893	if (verbosity >= 5)
1894		dump_indirect(dn);
1895
1896	if (verbosity >= 5) {
1897		/*
1898		 * Report the list of segments that comprise the object.
1899		 */
1900		uint64_t start = 0;
1901		uint64_t end;
1902		uint64_t blkfill = 1;
1903		int minlvl = 1;
1904
1905		if (dn->dn_type == DMU_OT_DNODE) {
1906			minlvl = 0;
1907			blkfill = DNODES_PER_BLOCK;
1908		}
1909
1910		for (;;) {
1911			char segsize[32];
1912			error = dnode_next_offset(dn,
1913			    0, &start, minlvl, blkfill, 0);
1914			if (error)
1915				break;
1916			end = start;
1917			error = dnode_next_offset(dn,
1918			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
1919			zdb_nicenum(end - start, segsize);
1920			(void) printf("\t\tsegment [%016llx, %016llx)"
1921			    " size %5s\n", (u_longlong_t)start,
1922			    (u_longlong_t)end, segsize);
1923			if (error)
1924				break;
1925			start = end;
1926		}
1927	}
1928
1929	if (db != NULL)
1930		dmu_buf_rele(db, FTAG);
1931}
1932
1933static char *objset_types[DMU_OST_NUMTYPES] = {
1934	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1935
1936static void
1937dump_dir(objset_t *os)
1938{
1939	dmu_objset_stats_t dds;
1940	uint64_t object, object_count;
1941	uint64_t refdbytes, usedobjs, scratch;
1942	char numbuf[32];
1943	char blkbuf[BP_SPRINTF_LEN + 20];
1944	char osname[ZFS_MAX_DATASET_NAME_LEN];
1945	char *type = "UNKNOWN";
1946	int verbosity = dump_opt['d'];
1947	int print_header = 1;
1948	int i, error;
1949
1950	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
1951	dmu_objset_fast_stat(os, &dds);
1952	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
1953
1954	if (dds.dds_type < DMU_OST_NUMTYPES)
1955		type = objset_types[dds.dds_type];
1956
1957	if (dds.dds_type == DMU_OST_META) {
1958		dds.dds_creation_txg = TXG_INITIAL;
1959		usedobjs = BP_GET_FILL(os->os_rootbp);
1960		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
1961		    dd_used_bytes;
1962	} else {
1963		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
1964	}
1965
1966	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
1967
1968	zdb_nicenum(refdbytes, numbuf);
1969
1970	if (verbosity >= 4) {
1971		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
1972		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
1973		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
1974	} else {
1975		blkbuf[0] = '\0';
1976	}
1977
1978	dmu_objset_name(os, osname);
1979
1980	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
1981	    "%s, %llu objects%s\n",
1982	    osname, type, (u_longlong_t)dmu_objset_id(os),
1983	    (u_longlong_t)dds.dds_creation_txg,
1984	    numbuf, (u_longlong_t)usedobjs, blkbuf);
1985
1986	if (zopt_objects != 0) {
1987		for (i = 0; i < zopt_objects; i++)
1988			dump_object(os, zopt_object[i], verbosity,
1989			    &print_header);
1990		(void) printf("\n");
1991		return;
1992	}
1993
1994	if (dump_opt['i'] != 0 || verbosity >= 2)
1995		dump_intent_log(dmu_objset_zil(os));
1996
1997	if (dmu_objset_ds(os) != NULL)
1998		dump_deadlist(&dmu_objset_ds(os)->ds_deadlist);
1999
2000	if (verbosity < 2)
2001		return;
2002
2003	if (BP_IS_HOLE(os->os_rootbp))
2004		return;
2005
2006	dump_object(os, 0, verbosity, &print_header);
2007	object_count = 0;
2008	if (DMU_USERUSED_DNODE(os) != NULL &&
2009	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
2010		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header);
2011		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header);
2012	}
2013
2014	object = 0;
2015	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2016		dump_object(os, object, verbosity, &print_header);
2017		object_count++;
2018	}
2019
2020	ASSERT3U(object_count, ==, usedobjs);
2021
2022	(void) printf("\n");
2023
2024	if (error != ESRCH) {
2025		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2026		abort();
2027	}
2028}
2029
2030static void
2031dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2032{
2033	time_t timestamp = ub->ub_timestamp;
2034
2035	(void) printf(header ? header : "");
2036	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2037	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2038	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2039	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2040	(void) printf("\ttimestamp = %llu UTC = %s",
2041	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2042	if (dump_opt['u'] >= 3) {
2043		char blkbuf[BP_SPRINTF_LEN];
2044		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2045		(void) printf("\trootbp = %s\n", blkbuf);
2046	}
2047	(void) printf(footer ? footer : "");
2048}
2049
2050static void
2051dump_config(spa_t *spa)
2052{
2053	dmu_buf_t *db;
2054	size_t nvsize = 0;
2055	int error = 0;
2056
2057
2058	error = dmu_bonus_hold(spa->spa_meta_objset,
2059	    spa->spa_config_object, FTAG, &db);
2060
2061	if (error == 0) {
2062		nvsize = *(uint64_t *)db->db_data;
2063		dmu_buf_rele(db, FTAG);
2064
2065		(void) printf("\nMOS Configuration:\n");
2066		dump_packed_nvlist(spa->spa_meta_objset,
2067		    spa->spa_config_object, (void *)&nvsize, 1);
2068	} else {
2069		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2070		    (u_longlong_t)spa->spa_config_object, error);
2071	}
2072}
2073
2074static void
2075dump_cachefile(const char *cachefile)
2076{
2077	int fd;
2078	struct stat64 statbuf;
2079	char *buf;
2080	nvlist_t *config;
2081
2082	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2083		(void) printf("cannot open '%s': %s\n", cachefile,
2084		    strerror(errno));
2085		exit(1);
2086	}
2087
2088	if (fstat64(fd, &statbuf) != 0) {
2089		(void) printf("failed to stat '%s': %s\n", cachefile,
2090		    strerror(errno));
2091		exit(1);
2092	}
2093
2094	if ((buf = malloc(statbuf.st_size)) == NULL) {
2095		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
2096		    (u_longlong_t)statbuf.st_size);
2097		exit(1);
2098	}
2099
2100	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2101		(void) fprintf(stderr, "failed to read %llu bytes\n",
2102		    (u_longlong_t)statbuf.st_size);
2103		exit(1);
2104	}
2105
2106	(void) close(fd);
2107
2108	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2109		(void) fprintf(stderr, "failed to unpack nvlist\n");
2110		exit(1);
2111	}
2112
2113	free(buf);
2114
2115	dump_nvlist(config, 0);
2116
2117	nvlist_free(config);
2118}
2119
2120#define	ZDB_MAX_UB_HEADER_SIZE 32
2121
2122static void
2123dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2124{
2125	vdev_t vd;
2126	vdev_t *vdp = &vd;
2127	char header[ZDB_MAX_UB_HEADER_SIZE];
2128
2129	vd.vdev_ashift = ashift;
2130	vdp->vdev_top = vdp;
2131
2132	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2133		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2134		uberblock_t *ub = (void *)((char *)lbl + uoff);
2135
2136		if (uberblock_verify(ub))
2137			continue;
2138		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2139		    "Uberblock[%d]\n", i);
2140		dump_uberblock(ub, header, "");
2141	}
2142}
2143
2144static int
2145dump_label(const char *dev)
2146{
2147	int fd;
2148	vdev_label_t label;
2149	char path[MAXPATHLEN];
2150	char *buf = label.vl_vdev_phys.vp_nvlist;
2151	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2152	struct stat64 statbuf;
2153	uint64_t psize, ashift;
2154	boolean_t label_found = B_FALSE;
2155
2156	(void) strlcpy(path, dev, sizeof (path));
2157	if (dev[0] == '/') {
2158		if (strncmp(dev, ZFS_DISK_ROOTD,
2159		    strlen(ZFS_DISK_ROOTD)) == 0) {
2160			(void) snprintf(path, sizeof (path), "%s%s",
2161			    ZFS_RDISK_ROOTD, dev + strlen(ZFS_DISK_ROOTD));
2162		}
2163	} else if (stat64(path, &statbuf) != 0) {
2164		char *s;
2165
2166		(void) snprintf(path, sizeof (path), "%s%s", ZFS_RDISK_ROOTD,
2167		    dev);
2168		if ((s = strrchr(dev, 's')) == NULL || !isdigit(*(s + 1)))
2169			(void) strlcat(path, "s0", sizeof (path));
2170	}
2171
2172	if (stat64(path, &statbuf) != 0) {
2173		(void) printf("failed to stat '%s': %s\n", path,
2174		    strerror(errno));
2175		exit(1);
2176	}
2177
2178	if (S_ISBLK(statbuf.st_mode)) {
2179		(void) printf("cannot use '%s': character device required\n",
2180		    path);
2181		exit(1);
2182	}
2183
2184	if ((fd = open64(path, O_RDONLY)) < 0) {
2185		(void) printf("cannot open '%s': %s\n", path, strerror(errno));
2186		exit(1);
2187	}
2188
2189	psize = statbuf.st_size;
2190	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2191
2192	for (int l = 0; l < VDEV_LABELS; l++) {
2193		nvlist_t *config = NULL;
2194
2195		if (!dump_opt['q']) {
2196			(void) printf("------------------------------------\n");
2197			(void) printf("LABEL %d\n", l);
2198			(void) printf("------------------------------------\n");
2199		}
2200
2201		if (pread64(fd, &label, sizeof (label),
2202		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2203			if (!dump_opt['q'])
2204				(void) printf("failed to read label %d\n", l);
2205			continue;
2206		}
2207
2208		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2209			if (!dump_opt['q'])
2210				(void) printf("failed to unpack label %d\n", l);
2211			ashift = SPA_MINBLOCKSHIFT;
2212		} else {
2213			nvlist_t *vdev_tree = NULL;
2214
2215			if (!dump_opt['q'])
2216				dump_nvlist(config, 4);
2217			if ((nvlist_lookup_nvlist(config,
2218			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2219			    (nvlist_lookup_uint64(vdev_tree,
2220			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2221				ashift = SPA_MINBLOCKSHIFT;
2222			nvlist_free(config);
2223			label_found = B_TRUE;
2224		}
2225		if (dump_opt['u'])
2226			dump_label_uberblocks(&label, ashift);
2227	}
2228
2229	(void) close(fd);
2230
2231	return (label_found ? 0 : 2);
2232}
2233
2234static uint64_t dataset_feature_count[SPA_FEATURES];
2235
2236/*ARGSUSED*/
2237static int
2238dump_one_dir(const char *dsname, void *arg)
2239{
2240	int error;
2241	objset_t *os;
2242
2243	error = dmu_objset_own(dsname, DMU_OST_ANY, B_TRUE, FTAG, &os);
2244	if (error) {
2245		(void) printf("Could not open %s, error %d\n", dsname, error);
2246		return (0);
2247	}
2248
2249	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
2250		if (!dmu_objset_ds(os)->ds_feature_inuse[f])
2251			continue;
2252		ASSERT(spa_feature_table[f].fi_flags &
2253		    ZFEATURE_FLAG_PER_DATASET);
2254		dataset_feature_count[f]++;
2255	}
2256
2257	dump_dir(os);
2258	dmu_objset_disown(os, FTAG);
2259	fuid_table_destroy();
2260	sa_loaded = B_FALSE;
2261	return (0);
2262}
2263
2264/*
2265 * Block statistics.
2266 */
2267#define	PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2268typedef struct zdb_blkstats {
2269	uint64_t zb_asize;
2270	uint64_t zb_lsize;
2271	uint64_t zb_psize;
2272	uint64_t zb_count;
2273	uint64_t zb_gangs;
2274	uint64_t zb_ditto_samevdev;
2275	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2276} zdb_blkstats_t;
2277
2278/*
2279 * Extended object types to report deferred frees and dedup auto-ditto blocks.
2280 */
2281#define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
2282#define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
2283#define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
2284#define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
2285
2286static char *zdb_ot_extname[] = {
2287	"deferred free",
2288	"dedup ditto",
2289	"other",
2290	"Total",
2291};
2292
2293#define	ZB_TOTAL	DN_MAX_LEVELS
2294
2295typedef struct zdb_cb {
2296	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2297	uint64_t	zcb_dedup_asize;
2298	uint64_t	zcb_dedup_blocks;
2299	uint64_t	zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2300	uint64_t	zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2301	    [BPE_PAYLOAD_SIZE];
2302	uint64_t	zcb_start;
2303	uint64_t	zcb_lastprint;
2304	uint64_t	zcb_totalasize;
2305	uint64_t	zcb_errors[256];
2306	int		zcb_readfails;
2307	int		zcb_haderrors;
2308	spa_t		*zcb_spa;
2309} zdb_cb_t;
2310
2311static void
2312zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2313    dmu_object_type_t type)
2314{
2315	uint64_t refcnt = 0;
2316
2317	ASSERT(type < ZDB_OT_TOTAL);
2318
2319	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2320		return;
2321
2322	for (int i = 0; i < 4; i++) {
2323		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2324		int t = (i & 1) ? type : ZDB_OT_TOTAL;
2325		int equal;
2326		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2327
2328		zb->zb_asize += BP_GET_ASIZE(bp);
2329		zb->zb_lsize += BP_GET_LSIZE(bp);
2330		zb->zb_psize += BP_GET_PSIZE(bp);
2331		zb->zb_count++;
2332
2333		/*
2334		 * The histogram is only big enough to record blocks up to
2335		 * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2336		 * "other", bucket.
2337		 */
2338		int idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2339		idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2340		zb->zb_psize_histogram[idx]++;
2341
2342		zb->zb_gangs += BP_COUNT_GANG(bp);
2343
2344		switch (BP_GET_NDVAS(bp)) {
2345		case 2:
2346			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2347			    DVA_GET_VDEV(&bp->blk_dva[1]))
2348				zb->zb_ditto_samevdev++;
2349			break;
2350		case 3:
2351			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2352			    DVA_GET_VDEV(&bp->blk_dva[1])) +
2353			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2354			    DVA_GET_VDEV(&bp->blk_dva[2])) +
2355			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2356			    DVA_GET_VDEV(&bp->blk_dva[2]));
2357			if (equal != 0)
2358				zb->zb_ditto_samevdev++;
2359			break;
2360		}
2361
2362	}
2363
2364	if (BP_IS_EMBEDDED(bp)) {
2365		zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2366		zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2367		    [BPE_GET_PSIZE(bp)]++;
2368		return;
2369	}
2370
2371	if (dump_opt['L'])
2372		return;
2373
2374	if (BP_GET_DEDUP(bp)) {
2375		ddt_t *ddt;
2376		ddt_entry_t *dde;
2377
2378		ddt = ddt_select(zcb->zcb_spa, bp);
2379		ddt_enter(ddt);
2380		dde = ddt_lookup(ddt, bp, B_FALSE);
2381
2382		if (dde == NULL) {
2383			refcnt = 0;
2384		} else {
2385			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2386			ddt_phys_decref(ddp);
2387			refcnt = ddp->ddp_refcnt;
2388			if (ddt_phys_total_refcnt(dde) == 0)
2389				ddt_remove(ddt, dde);
2390		}
2391		ddt_exit(ddt);
2392	}
2393
2394	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2395	    refcnt ? 0 : spa_first_txg(zcb->zcb_spa),
2396	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2397}
2398
2399static void
2400zdb_blkptr_done(zio_t *zio)
2401{
2402	spa_t *spa = zio->io_spa;
2403	blkptr_t *bp = zio->io_bp;
2404	int ioerr = zio->io_error;
2405	zdb_cb_t *zcb = zio->io_private;
2406	zbookmark_phys_t *zb = &zio->io_bookmark;
2407
2408	zio_data_buf_free(zio->io_data, zio->io_size);
2409
2410	mutex_enter(&spa->spa_scrub_lock);
2411	spa->spa_scrub_inflight--;
2412	cv_broadcast(&spa->spa_scrub_io_cv);
2413
2414	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
2415		char blkbuf[BP_SPRINTF_LEN];
2416
2417		zcb->zcb_haderrors = 1;
2418		zcb->zcb_errors[ioerr]++;
2419
2420		if (dump_opt['b'] >= 2)
2421			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2422		else
2423			blkbuf[0] = '\0';
2424
2425		(void) printf("zdb_blkptr_cb: "
2426		    "Got error %d reading "
2427		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
2428		    ioerr,
2429		    (u_longlong_t)zb->zb_objset,
2430		    (u_longlong_t)zb->zb_object,
2431		    (u_longlong_t)zb->zb_level,
2432		    (u_longlong_t)zb->zb_blkid,
2433		    blkbuf);
2434	}
2435	mutex_exit(&spa->spa_scrub_lock);
2436}
2437
2438static int
2439zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2440    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2441{
2442	zdb_cb_t *zcb = arg;
2443	dmu_object_type_t type;
2444	boolean_t is_metadata;
2445
2446	if (bp == NULL)
2447		return (0);
2448
2449	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
2450		char blkbuf[BP_SPRINTF_LEN];
2451		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2452		(void) printf("objset %llu object %llu "
2453		    "level %lld offset 0x%llx %s\n",
2454		    (u_longlong_t)zb->zb_objset,
2455		    (u_longlong_t)zb->zb_object,
2456		    (longlong_t)zb->zb_level,
2457		    (u_longlong_t)blkid2offset(dnp, bp, zb),
2458		    blkbuf);
2459	}
2460
2461	if (BP_IS_HOLE(bp))
2462		return (0);
2463
2464	type = BP_GET_TYPE(bp);
2465
2466	zdb_count_block(zcb, zilog, bp,
2467	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
2468
2469	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
2470
2471	if (!BP_IS_EMBEDDED(bp) &&
2472	    (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
2473		size_t size = BP_GET_PSIZE(bp);
2474		void *data = zio_data_buf_alloc(size);
2475		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
2476
2477		/* If it's an intent log block, failure is expected. */
2478		if (zb->zb_level == ZB_ZIL_LEVEL)
2479			flags |= ZIO_FLAG_SPECULATIVE;
2480
2481		mutex_enter(&spa->spa_scrub_lock);
2482		while (spa->spa_scrub_inflight > max_inflight)
2483			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
2484		spa->spa_scrub_inflight++;
2485		mutex_exit(&spa->spa_scrub_lock);
2486
2487		zio_nowait(zio_read(NULL, spa, bp, data, size,
2488		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
2489	}
2490
2491	zcb->zcb_readfails = 0;
2492
2493	/* only call gethrtime() every 100 blocks */
2494	static int iters;
2495	if (++iters > 100)
2496		iters = 0;
2497	else
2498		return (0);
2499
2500	if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
2501		uint64_t now = gethrtime();
2502		char buf[10];
2503		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
2504		int kb_per_sec =
2505		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
2506		int sec_remaining =
2507		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
2508
2509		zfs_nicenum(bytes, buf, sizeof (buf));
2510		(void) fprintf(stderr,
2511		    "\r%5s completed (%4dMB/s) "
2512		    "estimated time remaining: %uhr %02umin %02usec        ",
2513		    buf, kb_per_sec / 1024,
2514		    sec_remaining / 60 / 60,
2515		    sec_remaining / 60 % 60,
2516		    sec_remaining % 60);
2517
2518		zcb->zcb_lastprint = now;
2519	}
2520
2521	return (0);
2522}
2523
2524static void
2525zdb_leak(void *arg, uint64_t start, uint64_t size)
2526{
2527	vdev_t *vd = arg;
2528
2529	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
2530	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
2531}
2532
2533static metaslab_ops_t zdb_metaslab_ops = {
2534	NULL	/* alloc */
2535};
2536
2537static void
2538zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
2539{
2540	ddt_bookmark_t ddb = { 0 };
2541	ddt_entry_t dde;
2542	int error;
2543
2544	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
2545		blkptr_t blk;
2546		ddt_phys_t *ddp = dde.dde_phys;
2547
2548		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
2549			return;
2550
2551		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
2552
2553		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
2554			if (ddp->ddp_phys_birth == 0)
2555				continue;
2556			ddt_bp_create(ddb.ddb_checksum,
2557			    &dde.dde_key, ddp, &blk);
2558			if (p == DDT_PHYS_DITTO) {
2559				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
2560			} else {
2561				zcb->zcb_dedup_asize +=
2562				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
2563				zcb->zcb_dedup_blocks++;
2564			}
2565		}
2566		if (!dump_opt['L']) {
2567			ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
2568			ddt_enter(ddt);
2569			VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
2570			ddt_exit(ddt);
2571		}
2572	}
2573
2574	ASSERT(error == ENOENT);
2575}
2576
2577static void
2578zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
2579{
2580	zcb->zcb_spa = spa;
2581
2582	if (!dump_opt['L']) {
2583		vdev_t *rvd = spa->spa_root_vdev;
2584
2585		/*
2586		 * We are going to be changing the meaning of the metaslab's
2587		 * ms_tree.  Ensure that the allocator doesn't try to
2588		 * use the tree.
2589		 */
2590		spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
2591		spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
2592
2593		for (uint64_t c = 0; c < rvd->vdev_children; c++) {
2594			vdev_t *vd = rvd->vdev_child[c];
2595			metaslab_group_t *mg = vd->vdev_mg;
2596			for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
2597				metaslab_t *msp = vd->vdev_ms[m];
2598				ASSERT3P(msp->ms_group, ==, mg);
2599				mutex_enter(&msp->ms_lock);
2600				metaslab_unload(msp);
2601
2602				/*
2603				 * For leak detection, we overload the metaslab
2604				 * ms_tree to contain allocated segments
2605				 * instead of free segments. As a result,
2606				 * we can't use the normal metaslab_load/unload
2607				 * interfaces.
2608				 */
2609				if (msp->ms_sm != NULL) {
2610					(void) fprintf(stderr,
2611					    "\rloading space map for "
2612					    "vdev %llu of %llu, "
2613					    "metaslab %llu of %llu ...",
2614					    (longlong_t)c,
2615					    (longlong_t)rvd->vdev_children,
2616					    (longlong_t)m,
2617					    (longlong_t)vd->vdev_ms_count);
2618
2619					/*
2620					 * We don't want to spend the CPU
2621					 * manipulating the size-ordered
2622					 * tree, so clear the range_tree
2623					 * ops.
2624					 */
2625					msp->ms_tree->rt_ops = NULL;
2626					VERIFY0(space_map_load(msp->ms_sm,
2627					    msp->ms_tree, SM_ALLOC));
2628
2629					if (!msp->ms_loaded) {
2630						msp->ms_loaded = B_TRUE;
2631					}
2632				}
2633				mutex_exit(&msp->ms_lock);
2634			}
2635		}
2636		(void) fprintf(stderr, "\n");
2637	}
2638
2639	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2640
2641	zdb_ddt_leak_init(spa, zcb);
2642
2643	spa_config_exit(spa, SCL_CONFIG, FTAG);
2644}
2645
2646static void
2647zdb_leak_fini(spa_t *spa)
2648{
2649	if (!dump_opt['L']) {
2650		vdev_t *rvd = spa->spa_root_vdev;
2651		for (int c = 0; c < rvd->vdev_children; c++) {
2652			vdev_t *vd = rvd->vdev_child[c];
2653			metaslab_group_t *mg = vd->vdev_mg;
2654			for (int m = 0; m < vd->vdev_ms_count; m++) {
2655				metaslab_t *msp = vd->vdev_ms[m];
2656				ASSERT3P(mg, ==, msp->ms_group);
2657				mutex_enter(&msp->ms_lock);
2658
2659				/*
2660				 * The ms_tree has been overloaded to
2661				 * contain allocated segments. Now that we
2662				 * finished traversing all blocks, any
2663				 * block that remains in the ms_tree
2664				 * represents an allocated block that we
2665				 * did not claim during the traversal.
2666				 * Claimed blocks would have been removed
2667				 * from the ms_tree.
2668				 */
2669				range_tree_vacate(msp->ms_tree, zdb_leak, vd);
2670
2671				if (msp->ms_loaded) {
2672					msp->ms_loaded = B_FALSE;
2673				}
2674
2675				mutex_exit(&msp->ms_lock);
2676			}
2677		}
2678	}
2679}
2680
2681/* ARGSUSED */
2682static int
2683count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
2684{
2685	zdb_cb_t *zcb = arg;
2686
2687	if (dump_opt['b'] >= 5) {
2688		char blkbuf[BP_SPRINTF_LEN];
2689		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2690		(void) printf("[%s] %s\n",
2691		    "deferred free", blkbuf);
2692	}
2693	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
2694	return (0);
2695}
2696
2697static int
2698dump_block_stats(spa_t *spa)
2699{
2700	zdb_cb_t zcb = { 0 };
2701	zdb_blkstats_t *zb, *tzb;
2702	uint64_t norm_alloc, norm_space, total_alloc, total_found;
2703	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
2704	boolean_t leaks = B_FALSE;
2705
2706	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
2707	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
2708	    (dump_opt['c'] == 1) ? "metadata " : "",
2709	    dump_opt['c'] ? "checksums " : "",
2710	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
2711	    !dump_opt['L'] ? "nothing leaked " : "");
2712
2713	/*
2714	 * Load all space maps as SM_ALLOC maps, then traverse the pool
2715	 * claiming each block we discover.  If the pool is perfectly
2716	 * consistent, the space maps will be empty when we're done.
2717	 * Anything left over is a leak; any block we can't claim (because
2718	 * it's not part of any space map) is a double allocation,
2719	 * reference to a freed block, or an unclaimed log block.
2720	 */
2721	zdb_leak_init(spa, &zcb);
2722
2723	/*
2724	 * If there's a deferred-free bplist, process that first.
2725	 */
2726	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
2727	    count_block_cb, &zcb, NULL);
2728	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
2729		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
2730		    count_block_cb, &zcb, NULL);
2731	}
2732	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
2733		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
2734		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
2735		    &zcb, NULL));
2736	}
2737
2738	if (dump_opt['c'] > 1)
2739		flags |= TRAVERSE_PREFETCH_DATA;
2740
2741	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
2742	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
2743	zcb.zcb_haderrors |= traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
2744
2745	/*
2746	 * If we've traversed the data blocks then we need to wait for those
2747	 * I/Os to complete. We leverage "The Godfather" zio to wait on
2748	 * all async I/Os to complete.
2749	 */
2750	if (dump_opt['c']) {
2751		for (int i = 0; i < max_ncpus; i++) {
2752			(void) zio_wait(spa->spa_async_zio_root[i]);
2753			spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
2754			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
2755			    ZIO_FLAG_GODFATHER);
2756		}
2757	}
2758
2759	if (zcb.zcb_haderrors) {
2760		(void) printf("\nError counts:\n\n");
2761		(void) printf("\t%5s  %s\n", "errno", "count");
2762		for (int e = 0; e < 256; e++) {
2763			if (zcb.zcb_errors[e] != 0) {
2764				(void) printf("\t%5d  %llu\n",
2765				    e, (u_longlong_t)zcb.zcb_errors[e]);
2766			}
2767		}
2768	}
2769
2770	/*
2771	 * Report any leaked segments.
2772	 */
2773	zdb_leak_fini(spa);
2774
2775	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
2776
2777	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
2778	norm_space = metaslab_class_get_space(spa_normal_class(spa));
2779
2780	total_alloc = norm_alloc + metaslab_class_get_alloc(spa_log_class(spa));
2781	total_found = tzb->zb_asize - zcb.zcb_dedup_asize;
2782
2783	if (total_found == total_alloc) {
2784		if (!dump_opt['L'])
2785			(void) printf("\n\tNo leaks (block sum matches space"
2786			    " maps exactly)\n");
2787	} else {
2788		(void) printf("block traversal size %llu != alloc %llu "
2789		    "(%s %lld)\n",
2790		    (u_longlong_t)total_found,
2791		    (u_longlong_t)total_alloc,
2792		    (dump_opt['L']) ? "unreachable" : "leaked",
2793		    (longlong_t)(total_alloc - total_found));
2794		leaks = B_TRUE;
2795	}
2796
2797	if (tzb->zb_count == 0)
2798		return (2);
2799
2800	(void) printf("\n");
2801	(void) printf("\tbp count:      %10llu\n",
2802	    (u_longlong_t)tzb->zb_count);
2803	(void) printf("\tganged count:  %10llu\n",
2804	    (longlong_t)tzb->zb_gangs);
2805	(void) printf("\tbp logical:    %10llu      avg: %6llu\n",
2806	    (u_longlong_t)tzb->zb_lsize,
2807	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
2808	(void) printf("\tbp physical:   %10llu      avg:"
2809	    " %6llu     compression: %6.2f\n",
2810	    (u_longlong_t)tzb->zb_psize,
2811	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
2812	    (double)tzb->zb_lsize / tzb->zb_psize);
2813	(void) printf("\tbp allocated:  %10llu      avg:"
2814	    " %6llu     compression: %6.2f\n",
2815	    (u_longlong_t)tzb->zb_asize,
2816	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
2817	    (double)tzb->zb_lsize / tzb->zb_asize);
2818	(void) printf("\tbp deduped:    %10llu    ref>1:"
2819	    " %6llu   deduplication: %6.2f\n",
2820	    (u_longlong_t)zcb.zcb_dedup_asize,
2821	    (u_longlong_t)zcb.zcb_dedup_blocks,
2822	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
2823	(void) printf("\tSPA allocated: %10llu     used: %5.2f%%\n",
2824	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
2825
2826	for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
2827		if (zcb.zcb_embedded_blocks[i] == 0)
2828			continue;
2829		(void) printf("\n");
2830		(void) printf("\tadditional, non-pointer bps of type %u: "
2831		    "%10llu\n",
2832		    i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
2833
2834		if (dump_opt['b'] >= 3) {
2835			(void) printf("\t number of (compressed) bytes:  "
2836			    "number of bps\n");
2837			dump_histogram(zcb.zcb_embedded_histogram[i],
2838			    sizeof (zcb.zcb_embedded_histogram[i]) /
2839			    sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
2840		}
2841	}
2842
2843	if (tzb->zb_ditto_samevdev != 0) {
2844		(void) printf("\tDittoed blocks on same vdev: %llu\n",
2845		    (longlong_t)tzb->zb_ditto_samevdev);
2846	}
2847
2848	if (dump_opt['b'] >= 2) {
2849		int l, t, level;
2850		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2851		    "\t  avg\t comp\t%%Total\tType\n");
2852
2853		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
2854			char csize[32], lsize[32], psize[32], asize[32];
2855			char avg[32], gang[32];
2856			char *typename;
2857
2858			if (t < DMU_OT_NUMTYPES)
2859				typename = dmu_ot[t].ot_name;
2860			else
2861				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
2862
2863			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
2864				(void) printf("%6s\t%5s\t%5s\t%5s"
2865				    "\t%5s\t%5s\t%6s\t%s\n",
2866				    "-",
2867				    "-",
2868				    "-",
2869				    "-",
2870				    "-",
2871				    "-",
2872				    "-",
2873				    typename);
2874				continue;
2875			}
2876
2877			for (l = ZB_TOTAL - 1; l >= -1; l--) {
2878				level = (l == -1 ? ZB_TOTAL : l);
2879				zb = &zcb.zcb_type[level][t];
2880
2881				if (zb->zb_asize == 0)
2882					continue;
2883
2884				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
2885					continue;
2886
2887				if (level == 0 && zb->zb_asize ==
2888				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
2889					continue;
2890
2891				zdb_nicenum(zb->zb_count, csize);
2892				zdb_nicenum(zb->zb_lsize, lsize);
2893				zdb_nicenum(zb->zb_psize, psize);
2894				zdb_nicenum(zb->zb_asize, asize);
2895				zdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2896				zdb_nicenum(zb->zb_gangs, gang);
2897
2898				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
2899				    "\t%5.2f\t%6.2f\t",
2900				    csize, lsize, psize, asize, avg,
2901				    (double)zb->zb_lsize / zb->zb_psize,
2902				    100.0 * zb->zb_asize / tzb->zb_asize);
2903
2904				if (level == ZB_TOTAL)
2905					(void) printf("%s\n", typename);
2906				else
2907					(void) printf("    L%d %s\n",
2908					    level, typename);
2909
2910				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
2911					(void) printf("\t number of ganged "
2912					    "blocks: %s\n", gang);
2913				}
2914
2915				if (dump_opt['b'] >= 4) {
2916					(void) printf("psize "
2917					    "(in 512-byte sectors): "
2918					    "number of blocks\n");
2919					dump_histogram(zb->zb_psize_histogram,
2920					    PSIZE_HISTO_SIZE, 0);
2921				}
2922			}
2923		}
2924	}
2925
2926	(void) printf("\n");
2927
2928	if (leaks)
2929		return (2);
2930
2931	if (zcb.zcb_haderrors)
2932		return (3);
2933
2934	return (0);
2935}
2936
2937typedef struct zdb_ddt_entry {
2938	ddt_key_t	zdde_key;
2939	uint64_t	zdde_ref_blocks;
2940	uint64_t	zdde_ref_lsize;
2941	uint64_t	zdde_ref_psize;
2942	uint64_t	zdde_ref_dsize;
2943	avl_node_t	zdde_node;
2944} zdb_ddt_entry_t;
2945
2946/* ARGSUSED */
2947static int
2948zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2949    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2950{
2951	avl_tree_t *t = arg;
2952	avl_index_t where;
2953	zdb_ddt_entry_t *zdde, zdde_search;
2954
2955	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
2956		return (0);
2957
2958	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
2959		(void) printf("traversing objset %llu, %llu objects, "
2960		    "%lu blocks so far\n",
2961		    (u_longlong_t)zb->zb_objset,
2962		    (u_longlong_t)BP_GET_FILL(bp),
2963		    avl_numnodes(t));
2964	}
2965
2966	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
2967	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
2968		return (0);
2969
2970	ddt_key_fill(&zdde_search.zdde_key, bp);
2971
2972	zdde = avl_find(t, &zdde_search, &where);
2973
2974	if (zdde == NULL) {
2975		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
2976		zdde->zdde_key = zdde_search.zdde_key;
2977		avl_insert(t, zdde, where);
2978	}
2979
2980	zdde->zdde_ref_blocks += 1;
2981	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
2982	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
2983	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
2984
2985	return (0);
2986}
2987
2988static void
2989dump_simulated_ddt(spa_t *spa)
2990{
2991	avl_tree_t t;
2992	void *cookie = NULL;
2993	zdb_ddt_entry_t *zdde;
2994	ddt_histogram_t ddh_total = { 0 };
2995	ddt_stat_t dds_total = { 0 };
2996
2997	avl_create(&t, ddt_entry_compare,
2998	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
2999
3000	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3001
3002	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
3003	    zdb_ddt_add_cb, &t);
3004
3005	spa_config_exit(spa, SCL_CONFIG, FTAG);
3006
3007	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
3008		ddt_stat_t dds;
3009		uint64_t refcnt = zdde->zdde_ref_blocks;
3010		ASSERT(refcnt != 0);
3011
3012		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
3013		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
3014		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
3015		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
3016
3017		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
3018		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
3019		dds.dds_ref_psize = zdde->zdde_ref_psize;
3020		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
3021
3022		ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
3023		    &dds, 0);
3024
3025		umem_free(zdde, sizeof (*zdde));
3026	}
3027
3028	avl_destroy(&t);
3029
3030	ddt_histogram_stat(&dds_total, &ddh_total);
3031
3032	(void) printf("Simulated DDT histogram:\n");
3033
3034	zpool_dump_ddt(&dds_total, &ddh_total);
3035
3036	dump_dedup_ratio(&dds_total);
3037}
3038
3039static void
3040dump_zpool(spa_t *spa)
3041{
3042	dsl_pool_t *dp = spa_get_dsl(spa);
3043	int rc = 0;
3044
3045	if (dump_opt['S']) {
3046		dump_simulated_ddt(spa);
3047		return;
3048	}
3049
3050	if (!dump_opt['e'] && dump_opt['C'] > 1) {
3051		(void) printf("\nCached configuration:\n");
3052		dump_nvlist(spa->spa_config, 8);
3053	}
3054
3055	if (dump_opt['C'])
3056		dump_config(spa);
3057
3058	if (dump_opt['u'])
3059		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
3060
3061	if (dump_opt['D'])
3062		dump_all_ddts(spa);
3063
3064	if (dump_opt['d'] > 2 || dump_opt['m'])
3065		dump_metaslabs(spa);
3066	if (dump_opt['M'])
3067		dump_metaslab_groups(spa);
3068
3069	if (dump_opt['d'] || dump_opt['i']) {
3070		dump_dir(dp->dp_meta_objset);
3071		if (dump_opt['d'] >= 3) {
3072			dump_full_bpobj(&spa->spa_deferred_bpobj,
3073			    "Deferred frees", 0);
3074			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
3075				dump_full_bpobj(
3076				    &spa->spa_dsl_pool->dp_free_bpobj,
3077				    "Pool snapshot frees", 0);
3078			}
3079
3080			if (spa_feature_is_active(spa,
3081			    SPA_FEATURE_ASYNC_DESTROY)) {
3082				dump_bptree(spa->spa_meta_objset,
3083				    spa->spa_dsl_pool->dp_bptree_obj,
3084				    "Pool dataset frees");
3085			}
3086			dump_dtl(spa->spa_root_vdev, 0);
3087		}
3088		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
3089		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
3090
3091		for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
3092			uint64_t refcount;
3093
3094			if (!(spa_feature_table[f].fi_flags &
3095			    ZFEATURE_FLAG_PER_DATASET) ||
3096			    !spa_feature_is_enabled(spa, f)) {
3097				ASSERT0(dataset_feature_count[f]);
3098				continue;
3099			}
3100			(void) feature_get_refcount(spa,
3101			    &spa_feature_table[f], &refcount);
3102			if (dataset_feature_count[f] != refcount) {
3103				(void) printf("%s feature refcount mismatch: "
3104				    "%lld datasets != %lld refcount\n",
3105				    spa_feature_table[f].fi_uname,
3106				    (longlong_t)dataset_feature_count[f],
3107				    (longlong_t)refcount);
3108				rc = 2;
3109			} else {
3110				(void) printf("Verified %s feature refcount "
3111				    "of %llu is correct\n",
3112				    spa_feature_table[f].fi_uname,
3113				    (longlong_t)refcount);
3114			}
3115		}
3116	}
3117	if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
3118		rc = dump_block_stats(spa);
3119
3120	if (rc == 0)
3121		rc = verify_spacemap_refcounts(spa);
3122
3123	if (dump_opt['s'])
3124		show_pool_stats(spa);
3125
3126	if (dump_opt['h'])
3127		dump_history(spa);
3128
3129	if (rc != 0) {
3130		dump_debug_buffer();
3131		exit(rc);
3132	}
3133}
3134
3135#define	ZDB_FLAG_CHECKSUM	0x0001
3136#define	ZDB_FLAG_DECOMPRESS	0x0002
3137#define	ZDB_FLAG_BSWAP		0x0004
3138#define	ZDB_FLAG_GBH		0x0008
3139#define	ZDB_FLAG_INDIRECT	0x0010
3140#define	ZDB_FLAG_PHYS		0x0020
3141#define	ZDB_FLAG_RAW		0x0040
3142#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
3143
3144int flagbits[256];
3145
3146static void
3147zdb_print_blkptr(blkptr_t *bp, int flags)
3148{
3149	char blkbuf[BP_SPRINTF_LEN];
3150
3151	if (flags & ZDB_FLAG_BSWAP)
3152		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
3153
3154	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3155	(void) printf("%s\n", blkbuf);
3156}
3157
3158static void
3159zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
3160{
3161	int i;
3162
3163	for (i = 0; i < nbps; i++)
3164		zdb_print_blkptr(&bp[i], flags);
3165}
3166
3167static void
3168zdb_dump_gbh(void *buf, int flags)
3169{
3170	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
3171}
3172
3173static void
3174zdb_dump_block_raw(void *buf, uint64_t size, int flags)
3175{
3176	if (flags & ZDB_FLAG_BSWAP)
3177		byteswap_uint64_array(buf, size);
3178	(void) write(1, buf, size);
3179}
3180
3181static void
3182zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
3183{
3184	uint64_t *d = (uint64_t *)buf;
3185	int nwords = size / sizeof (uint64_t);
3186	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
3187	int i, j;
3188	char *hdr, *c;
3189
3190
3191	if (do_bswap)
3192		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
3193	else
3194		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
3195
3196	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
3197
3198	for (i = 0; i < nwords; i += 2) {
3199		(void) printf("%06llx:  %016llx  %016llx  ",
3200		    (u_longlong_t)(i * sizeof (uint64_t)),
3201		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
3202		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
3203
3204		c = (char *)&d[i];
3205		for (j = 0; j < 2 * sizeof (uint64_t); j++)
3206			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
3207		(void) printf("\n");
3208	}
3209}
3210
3211/*
3212 * There are two acceptable formats:
3213 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
3214 *	child[.child]*    - For example: 0.1.1
3215 *
3216 * The second form can be used to specify arbitrary vdevs anywhere
3217 * in the heirarchy.  For example, in a pool with a mirror of
3218 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
3219 */
3220static vdev_t *
3221zdb_vdev_lookup(vdev_t *vdev, char *path)
3222{
3223	char *s, *p, *q;
3224	int i;
3225
3226	if (vdev == NULL)
3227		return (NULL);
3228
3229	/* First, assume the x.x.x.x format */
3230	i = (int)strtoul(path, &s, 10);
3231	if (s == path || (s && *s != '.' && *s != '\0'))
3232		goto name;
3233	if (i < 0 || i >= vdev->vdev_children)
3234		return (NULL);
3235
3236	vdev = vdev->vdev_child[i];
3237	if (*s == '\0')
3238		return (vdev);
3239	return (zdb_vdev_lookup(vdev, s+1));
3240
3241name:
3242	for (i = 0; i < vdev->vdev_children; i++) {
3243		vdev_t *vc = vdev->vdev_child[i];
3244
3245		if (vc->vdev_path == NULL) {
3246			vc = zdb_vdev_lookup(vc, path);
3247			if (vc == NULL)
3248				continue;
3249			else
3250				return (vc);
3251		}
3252
3253		p = strrchr(vc->vdev_path, '/');
3254		p = p ? p + 1 : vc->vdev_path;
3255		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
3256
3257		if (strcmp(vc->vdev_path, path) == 0)
3258			return (vc);
3259		if (strcmp(p, path) == 0)
3260			return (vc);
3261		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
3262			return (vc);
3263	}
3264
3265	return (NULL);
3266}
3267
3268/*
3269 * Read a block from a pool and print it out.  The syntax of the
3270 * block descriptor is:
3271 *
3272 *	pool:vdev_specifier:offset:size[:flags]
3273 *
3274 *	pool           - The name of the pool you wish to read from
3275 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
3276 *	offset         - offset, in hex, in bytes
3277 *	size           - Amount of data to read, in hex, in bytes
3278 *	flags          - A string of characters specifying options
3279 *		 b: Decode a blkptr at given offset within block
3280 *		*c: Calculate and display checksums
3281 *		 d: Decompress data before dumping
3282 *		 e: Byteswap data before dumping
3283 *		 g: Display data as a gang block header
3284 *		 i: Display as an indirect block
3285 *		 p: Do I/O to physical offset
3286 *		 r: Dump raw data to stdout
3287 *
3288 *              * = not yet implemented
3289 */
3290static void
3291zdb_read_block(char *thing, spa_t *spa)
3292{
3293	blkptr_t blk, *bp = &blk;
3294	dva_t *dva = bp->blk_dva;
3295	int flags = 0;
3296	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
3297	zio_t *zio;
3298	vdev_t *vd;
3299	void *pbuf, *lbuf, *buf;
3300	char *s, *p, *dup, *vdev, *flagstr;
3301	int i, error;
3302
3303	dup = strdup(thing);
3304	s = strtok(dup, ":");
3305	vdev = s ? s : "";
3306	s = strtok(NULL, ":");
3307	offset = strtoull(s ? s : "", NULL, 16);
3308	s = strtok(NULL, ":");
3309	size = strtoull(s ? s : "", NULL, 16);
3310	s = strtok(NULL, ":");
3311	flagstr = s ? s : "";
3312
3313	s = NULL;
3314	if (size == 0)
3315		s = "size must not be zero";
3316	if (!IS_P2ALIGNED(size, DEV_BSIZE))
3317		s = "size must be a multiple of sector size";
3318	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
3319		s = "offset must be a multiple of sector size";
3320	if (s) {
3321		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
3322		free(dup);
3323		return;
3324	}
3325
3326	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
3327		for (i = 0; flagstr[i]; i++) {
3328			int bit = flagbits[(uchar_t)flagstr[i]];
3329
3330			if (bit == 0) {
3331				(void) printf("***Invalid flag: %c\n",
3332				    flagstr[i]);
3333				continue;
3334			}
3335			flags |= bit;
3336
3337			/* If it's not something with an argument, keep going */
3338			if ((bit & (ZDB_FLAG_CHECKSUM |
3339			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
3340				continue;
3341
3342			p = &flagstr[i + 1];
3343			if (bit == ZDB_FLAG_PRINT_BLKPTR)
3344				blkptr_offset = strtoull(p, &p, 16);
3345			if (*p != ':' && *p != '\0') {
3346				(void) printf("***Invalid flag arg: '%s'\n", s);
3347				free(dup);
3348				return;
3349			}
3350		}
3351	}
3352
3353	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
3354	if (vd == NULL) {
3355		(void) printf("***Invalid vdev: %s\n", vdev);
3356		free(dup);
3357		return;
3358	} else {
3359		if (vd->vdev_path)
3360			(void) fprintf(stderr, "Found vdev: %s\n",
3361			    vd->vdev_path);
3362		else
3363			(void) fprintf(stderr, "Found vdev type: %s\n",
3364			    vd->vdev_ops->vdev_op_type);
3365	}
3366
3367	psize = size;
3368	lsize = size;
3369
3370	pbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3371	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3372
3373	BP_ZERO(bp);
3374
3375	DVA_SET_VDEV(&dva[0], vd->vdev_id);
3376	DVA_SET_OFFSET(&dva[0], offset);
3377	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
3378	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
3379
3380	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
3381
3382	BP_SET_LSIZE(bp, lsize);
3383	BP_SET_PSIZE(bp, psize);
3384	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
3385	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
3386	BP_SET_TYPE(bp, DMU_OT_NONE);
3387	BP_SET_LEVEL(bp, 0);
3388	BP_SET_DEDUP(bp, 0);
3389	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
3390
3391	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
3392	zio = zio_root(spa, NULL, NULL, 0);
3393
3394	if (vd == vd->vdev_top) {
3395		/*
3396		 * Treat this as a normal block read.
3397		 */
3398		zio_nowait(zio_read(zio, spa, bp, pbuf, psize, NULL, NULL,
3399		    ZIO_PRIORITY_SYNC_READ,
3400		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
3401	} else {
3402		/*
3403		 * Treat this as a vdev child I/O.
3404		 */
3405		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pbuf, psize,
3406		    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
3407		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
3408		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
3409		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL, NULL));
3410	}
3411
3412	error = zio_wait(zio);
3413	spa_config_exit(spa, SCL_STATE, FTAG);
3414
3415	if (error) {
3416		(void) printf("Read of %s failed, error: %d\n", thing, error);
3417		goto out;
3418	}
3419
3420	if (flags & ZDB_FLAG_DECOMPRESS) {
3421		/*
3422		 * We don't know how the data was compressed, so just try
3423		 * every decompress function at every inflated blocksize.
3424		 */
3425		enum zio_compress c;
3426		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3427		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3428
3429		bcopy(pbuf, pbuf2, psize);
3430
3431		VERIFY(random_get_pseudo_bytes((uint8_t *)pbuf + psize,
3432		    SPA_MAXBLOCKSIZE - psize) == 0);
3433
3434		VERIFY(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
3435		    SPA_MAXBLOCKSIZE - psize) == 0);
3436
3437		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
3438		    lsize -= SPA_MINBLOCKSIZE) {
3439			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
3440				if (zio_decompress_data(c, pbuf, lbuf,
3441				    psize, lsize) == 0 &&
3442				    zio_decompress_data(c, pbuf2, lbuf2,
3443				    psize, lsize) == 0 &&
3444				    bcmp(lbuf, lbuf2, lsize) == 0)
3445					break;
3446			}
3447			if (c != ZIO_COMPRESS_FUNCTIONS)
3448				break;
3449			lsize -= SPA_MINBLOCKSIZE;
3450		}
3451
3452		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
3453		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
3454
3455		if (lsize <= psize) {
3456			(void) printf("Decompress of %s failed\n", thing);
3457			goto out;
3458		}
3459		buf = lbuf;
3460		size = lsize;
3461	} else {
3462		buf = pbuf;
3463		size = psize;
3464	}
3465
3466	if (flags & ZDB_FLAG_PRINT_BLKPTR)
3467		zdb_print_blkptr((blkptr_t *)(void *)
3468		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
3469	else if (flags & ZDB_FLAG_RAW)
3470		zdb_dump_block_raw(buf, size, flags);
3471	else if (flags & ZDB_FLAG_INDIRECT)
3472		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
3473		    flags);
3474	else if (flags & ZDB_FLAG_GBH)
3475		zdb_dump_gbh(buf, flags);
3476	else
3477		zdb_dump_block(thing, buf, size, flags);
3478
3479out:
3480	umem_free(pbuf, SPA_MAXBLOCKSIZE);
3481	umem_free(lbuf, SPA_MAXBLOCKSIZE);
3482	free(dup);
3483}
3484
3485static boolean_t
3486pool_match(nvlist_t *cfg, char *tgt)
3487{
3488	uint64_t v, guid = strtoull(tgt, NULL, 0);
3489	char *s;
3490
3491	if (guid != 0) {
3492		if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0)
3493			return (v == guid);
3494	} else {
3495		if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0)
3496			return (strcmp(s, tgt) == 0);
3497	}
3498	return (B_FALSE);
3499}
3500
3501static char *
3502find_zpool(char **target, nvlist_t **configp, int dirc, char **dirv)
3503{
3504	nvlist_t *pools;
3505	nvlist_t *match = NULL;
3506	char *name = NULL;
3507	char *sepp = NULL;
3508	char sep = '\0';
3509	int count = 0;
3510	importargs_t args = { 0 };
3511
3512	args.paths = dirc;
3513	args.path = dirv;
3514	args.can_be_active = B_TRUE;
3515
3516	if ((sepp = strpbrk(*target, "/@")) != NULL) {
3517		sep = *sepp;
3518		*sepp = '\0';
3519	}
3520
3521	pools = zpool_search_import(g_zfs, &args);
3522
3523	if (pools != NULL) {
3524		nvpair_t *elem = NULL;
3525		while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) {
3526			verify(nvpair_value_nvlist(elem, configp) == 0);
3527			if (pool_match(*configp, *target)) {
3528				count++;
3529				if (match != NULL) {
3530					/* print previously found config */
3531					if (name != NULL) {
3532						(void) printf("%s\n", name);
3533						dump_nvlist(match, 8);
3534						name = NULL;
3535					}
3536					(void) printf("%s\n",
3537					    nvpair_name(elem));
3538					dump_nvlist(*configp, 8);
3539				} else {
3540					match = *configp;
3541					name = nvpair_name(elem);
3542				}
3543			}
3544		}
3545	}
3546	if (count > 1)
3547		(void) fatal("\tMatched %d pools - use pool GUID "
3548		    "instead of pool name or \n"
3549		    "\tpool name part of a dataset name to select pool", count);
3550
3551	if (sepp)
3552		*sepp = sep;
3553	/*
3554	 * If pool GUID was specified for pool id, replace it with pool name
3555	 */
3556	if (name && (strstr(*target, name) != *target)) {
3557		int sz = 1 + strlen(name) + ((sepp) ? strlen(sepp) : 0);
3558
3559		*target = umem_alloc(sz, UMEM_NOFAIL);
3560		(void) snprintf(*target, sz, "%s%s", name, sepp ? sepp : "");
3561	}
3562
3563	*configp = name ? match : NULL;
3564
3565	return (name);
3566}
3567
3568int
3569main(int argc, char **argv)
3570{
3571	int i, c;
3572	struct rlimit rl = { 1024, 1024 };
3573	spa_t *spa = NULL;
3574	objset_t *os = NULL;
3575	int dump_all = 1;
3576	int verbose = 0;
3577	int error = 0;
3578	char **searchdirs = NULL;
3579	int nsearch = 0;
3580	char *target;
3581	nvlist_t *policy = NULL;
3582	uint64_t max_txg = UINT64_MAX;
3583	int rewind = ZPOOL_NEVER_REWIND;
3584	char *spa_config_path_env;
3585	boolean_t target_is_spa = B_TRUE;
3586
3587	(void) setrlimit(RLIMIT_NOFILE, &rl);
3588	(void) enable_extended_FILE_stdio(-1, -1);
3589
3590	dprintf_setup(&argc, argv);
3591
3592	/*
3593	 * If there is an environment variable SPA_CONFIG_PATH it overrides
3594	 * default spa_config_path setting. If -U flag is specified it will
3595	 * override this environment variable settings once again.
3596	 */
3597	spa_config_path_env = getenv("SPA_CONFIG_PATH");
3598	if (spa_config_path_env != NULL)
3599		spa_config_path = spa_config_path_env;
3600
3601	while ((c = getopt(argc, argv,
3602	    "bcdhilmMI:suCDRSAFLXx:evp:t:U:PGo:q")) != -1) {
3603		switch (c) {
3604		case 'b':
3605		case 'c':
3606		case 'd':
3607		case 'h':
3608		case 'i':
3609		case 'l':
3610		case 'm':
3611		case 's':
3612		case 'u':
3613		case 'C':
3614		case 'D':
3615		case 'M':
3616		case 'R':
3617		case 'S':
3618		case 'G':
3619			dump_opt[c]++;
3620			dump_all = 0;
3621			break;
3622		case 'A':
3623		case 'F':
3624		case 'L':
3625		case 'X':
3626		case 'e':
3627		case 'P':
3628		case 'q':
3629			dump_opt[c]++;
3630			break;
3631		case 'I':
3632			max_inflight = strtoull(optarg, NULL, 0);
3633			if (max_inflight == 0) {
3634				(void) fprintf(stderr, "maximum number "
3635				    "of inflight I/Os must be greater "
3636				    "than 0\n");
3637				usage();
3638			}
3639			break;
3640		case 'p':
3641			if (searchdirs == NULL) {
3642				searchdirs = umem_alloc(sizeof (char *),
3643				    UMEM_NOFAIL);
3644			} else {
3645				char **tmp = umem_alloc((nsearch + 1) *
3646				    sizeof (char *), UMEM_NOFAIL);
3647				bcopy(searchdirs, tmp, nsearch *
3648				    sizeof (char *));
3649				umem_free(searchdirs,
3650				    nsearch * sizeof (char *));
3651				searchdirs = tmp;
3652			}
3653			searchdirs[nsearch++] = optarg;
3654			break;
3655		case 't':
3656			max_txg = strtoull(optarg, NULL, 0);
3657			if (max_txg < TXG_INITIAL) {
3658				(void) fprintf(stderr, "incorrect txg "
3659				    "specified: %s\n", optarg);
3660				usage();
3661			}
3662			break;
3663		case 'U':
3664			spa_config_path = optarg;
3665			break;
3666		case 'v':
3667			verbose++;
3668			break;
3669		case 'x':
3670			vn_dumpdir = optarg;
3671			break;
3672		case 'o':
3673			error = set_global_var(optarg);
3674			if (error != 0)
3675				usage();
3676			break;
3677		default:
3678			usage();
3679			break;
3680		}
3681	}
3682
3683	if (!dump_opt['e'] && searchdirs != NULL) {
3684		(void) fprintf(stderr, "-p option requires use of -e\n");
3685		usage();
3686	}
3687
3688	/*
3689	 * ZDB does not typically re-read blocks; therefore limit the ARC
3690	 * to 256 MB, which can be used entirely for metadata.
3691	 */
3692	zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
3693
3694	/*
3695	 * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
3696	 * "zdb -b" uses traversal prefetch which uses async reads.
3697	 * For good performance, let several of them be active at once.
3698	 */
3699	zfs_vdev_async_read_max_active = 10;
3700
3701	/*
3702	 * Disable reference tracking for better performance.
3703	 */
3704	reference_tracking_enable = B_FALSE;
3705
3706	kernel_init(FREAD);
3707	g_zfs = libzfs_init();
3708	ASSERT(g_zfs != NULL);
3709
3710	if (dump_all)
3711		verbose = MAX(verbose, 1);
3712
3713	for (c = 0; c < 256; c++) {
3714		if (dump_all && !strchr("elAFLRSXP", c))
3715			dump_opt[c] = 1;
3716		if (dump_opt[c])
3717			dump_opt[c] += verbose;
3718	}
3719
3720	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
3721	zfs_recover = (dump_opt['A'] > 1);
3722
3723	argc -= optind;
3724	argv += optind;
3725
3726	if (argc < 2 && dump_opt['R'])
3727		usage();
3728	if (argc < 1) {
3729		if (!dump_opt['e'] && dump_opt['C']) {
3730			dump_cachefile(spa_config_path);
3731			return (0);
3732		}
3733		usage();
3734	}
3735
3736	if (dump_opt['l'])
3737		return (dump_label(argv[0]));
3738
3739	if (dump_opt['X'] || dump_opt['F'])
3740		rewind = ZPOOL_DO_REWIND |
3741		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
3742
3743	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
3744	    nvlist_add_uint64(policy, ZPOOL_REWIND_REQUEST_TXG, max_txg) != 0 ||
3745	    nvlist_add_uint32(policy, ZPOOL_REWIND_REQUEST, rewind) != 0)
3746		fatal("internal error: %s", strerror(ENOMEM));
3747
3748	error = 0;
3749	target = argv[0];
3750
3751	if (dump_opt['e']) {
3752		nvlist_t *cfg = NULL;
3753		char *name = find_zpool(&target, &cfg, nsearch, searchdirs);
3754
3755		error = ENOENT;
3756		if (name) {
3757			if (dump_opt['C'] > 1) {
3758				(void) printf("\nConfiguration for import:\n");
3759				dump_nvlist(cfg, 8);
3760			}
3761			if (nvlist_add_nvlist(cfg,
3762			    ZPOOL_REWIND_POLICY, policy) != 0) {
3763				fatal("can't open '%s': %s",
3764				    target, strerror(ENOMEM));
3765			}
3766			if ((error = spa_import(name, cfg, NULL,
3767			    ZFS_IMPORT_MISSING_LOG)) != 0) {
3768				error = spa_import(name, cfg, NULL,
3769				    ZFS_IMPORT_VERBATIM);
3770			}
3771		}
3772	}
3773
3774	if (strpbrk(target, "/@") != NULL) {
3775		size_t targetlen;
3776
3777		target_is_spa = B_FALSE;
3778		/*
3779		 * Remove any trailing slash.  Later code would get confused
3780		 * by it, but we want to allow it so that "pool/" can
3781		 * indicate that we want to dump the topmost filesystem,
3782		 * rather than the whole pool.
3783		 */
3784		targetlen = strlen(target);
3785		if (targetlen != 0 && target[targetlen - 1] == '/')
3786			target[targetlen - 1] = '\0';
3787	}
3788
3789	if (error == 0) {
3790		if (target_is_spa || dump_opt['R']) {
3791			error = spa_open_rewind(target, &spa, FTAG, policy,
3792			    NULL);
3793			if (error) {
3794				/*
3795				 * If we're missing the log device then
3796				 * try opening the pool after clearing the
3797				 * log state.
3798				 */
3799				mutex_enter(&spa_namespace_lock);
3800				if ((spa = spa_lookup(target)) != NULL &&
3801				    spa->spa_log_state == SPA_LOG_MISSING) {
3802					spa->spa_log_state = SPA_LOG_CLEAR;
3803					error = 0;
3804				}
3805				mutex_exit(&spa_namespace_lock);
3806
3807				if (!error) {
3808					error = spa_open_rewind(target, &spa,
3809					    FTAG, policy, NULL);
3810				}
3811			}
3812		} else {
3813			error = dmu_objset_own(target, DMU_OST_ANY,
3814			    B_TRUE, FTAG, &os);
3815		}
3816	}
3817	nvlist_free(policy);
3818
3819	if (error)
3820		fatal("can't open '%s': %s", target, strerror(error));
3821
3822	argv++;
3823	argc--;
3824	if (!dump_opt['R']) {
3825		if (argc > 0) {
3826			zopt_objects = argc;
3827			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
3828			for (i = 0; i < zopt_objects; i++) {
3829				errno = 0;
3830				zopt_object[i] = strtoull(argv[i], NULL, 0);
3831				if (zopt_object[i] == 0 && errno != 0)
3832					fatal("bad number %s: %s",
3833					    argv[i], strerror(errno));
3834			}
3835		}
3836		if (os != NULL) {
3837			dump_dir(os);
3838		} else if (zopt_objects > 0 && !dump_opt['m']) {
3839			dump_dir(spa->spa_meta_objset);
3840		} else {
3841			dump_zpool(spa);
3842		}
3843	} else {
3844		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
3845		flagbits['c'] = ZDB_FLAG_CHECKSUM;
3846		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
3847		flagbits['e'] = ZDB_FLAG_BSWAP;
3848		flagbits['g'] = ZDB_FLAG_GBH;
3849		flagbits['i'] = ZDB_FLAG_INDIRECT;
3850		flagbits['p'] = ZDB_FLAG_PHYS;
3851		flagbits['r'] = ZDB_FLAG_RAW;
3852
3853		for (i = 0; i < argc; i++)
3854			zdb_read_block(argv[i], spa);
3855	}
3856
3857	(os != NULL) ? dmu_objset_disown(os, FTAG) : spa_close(spa, FTAG);
3858
3859	fuid_table_destroy();
3860	sa_loaded = B_FALSE;
3861
3862	dump_debug_buffer();
3863
3864	libzfs_fini(g_zfs);
3865	kernel_fini();
3866
3867	return (0);
3868}
3869