xref: /illumos-gate/usr/src/cmd/zdb/zdb.c (revision eb633035c80613ec93d62f90482837adaaf21a0a)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
25  * Copyright (c) 2014 Integros [integros.com]
26  * Copyright 2017 Nexenta Systems, Inc.
27  * Copyright (c) 2017, 2018 Lawrence Livermore National Security, LLC.
28  * Copyright 2017 RackTop Systems.
29  */
30 
31 #include <stdio.h>
32 #include <unistd.h>
33 #include <stdio_ext.h>
34 #include <stdlib.h>
35 #include <ctype.h>
36 #include <sys/zfs_context.h>
37 #include <sys/spa.h>
38 #include <sys/spa_impl.h>
39 #include <sys/dmu.h>
40 #include <sys/zap.h>
41 #include <sys/fs/zfs.h>
42 #include <sys/zfs_znode.h>
43 #include <sys/zfs_sa.h>
44 #include <sys/sa.h>
45 #include <sys/sa_impl.h>
46 #include <sys/vdev.h>
47 #include <sys/vdev_impl.h>
48 #include <sys/metaslab_impl.h>
49 #include <sys/dmu_objset.h>
50 #include <sys/dsl_dir.h>
51 #include <sys/dsl_dataset.h>
52 #include <sys/dsl_pool.h>
53 #include <sys/dbuf.h>
54 #include <sys/zil.h>
55 #include <sys/zil_impl.h>
56 #include <sys/stat.h>
57 #include <sys/resource.h>
58 #include <sys/dmu_traverse.h>
59 #include <sys/zio_checksum.h>
60 #include <sys/zio_compress.h>
61 #include <sys/zfs_fuid.h>
62 #include <sys/arc.h>
63 #include <sys/ddt.h>
64 #include <sys/zfeature.h>
65 #include <sys/abd.h>
66 #include <sys/blkptr.h>
67 #include <sys/dsl_scan.h>
68 #include <sys/dsl_crypt.h>
69 #include <zfs_comutil.h>
70 #include <libcmdutils.h>
71 #undef verify
72 #include <libzfs.h>
73 
74 #include "zdb.h"
75 
76 #define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
77 	zio_compress_table[(idx)].ci_name : "UNKNOWN")
78 #define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
79 	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
80 #define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
81 	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
82 	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
83 #define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
84 	(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ?	\
85 	DMU_OT_ZAP_OTHER : \
86 	(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
87 	DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
88 
89 #ifndef lint
90 extern int reference_tracking_enable;
91 extern boolean_t zfs_recover;
92 extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
93 extern int zfs_vdev_async_read_max_active;
94 extern int aok;
95 extern boolean_t spa_load_verify_dryrun;
96 #else
97 int reference_tracking_enable;
98 boolean_t zfs_recover;
99 uint64_t zfs_arc_max, zfs_arc_meta_limit;
100 int zfs_vdev_async_read_max_active;
101 int aok;
102 boolean_t spa_load_verify_dryrun;
103 #endif
104 
105 static const char cmdname[] = "zdb";
106 uint8_t dump_opt[256];
107 
108 typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
109 
110 uint64_t *zopt_object = NULL;
111 static unsigned zopt_objects = 0;
112 libzfs_handle_t *g_zfs;
113 uint64_t max_inflight = 1000;
114 static int leaked_objects = 0;
115 
116 static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
117 static void mos_obj_refd(uint64_t);
118 
119 /*
120  * These libumem hooks provide a reasonable set of defaults for the allocator's
121  * debugging facilities.
122  */
123 const char *
124 _umem_debug_init()
125 {
126 	return ("default,verbose"); /* $UMEM_DEBUG setting */
127 }
128 
129 const char *
130 _umem_logging_init(void)
131 {
132 	return ("fail,contents"); /* $UMEM_LOGGING setting */
133 }
134 
135 static void
136 usage(void)
137 {
138 	(void) fprintf(stderr,
139 	    "Usage:\t%s [-AbcdDFGhikLMPsvX] [-e [-V] [-p <path> ...]] "
140 	    "[-I <inflight I/Os>]\n"
141 	    "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
142 	    "\t\t[<poolname> [<object> ...]]\n"
143 	    "\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset> "
144 	    "[<object> ...]\n"
145 	    "\t%s -C [-A] [-U <cache>]\n"
146 	    "\t%s -l [-Aqu] <device>\n"
147 	    "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
148 	    "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
149 	    "\t%s -O <dataset> <path>\n"
150 	    "\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
151 	    "\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
152 	    "\t%s -E [-A] word0:word1:...:word15\n"
153 	    "\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
154 	    "<poolname>\n\n",
155 	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
156 	    cmdname, cmdname);
157 
158 	(void) fprintf(stderr, "    Dataset name must include at least one "
159 	    "separator character '/' or '@'\n");
160 	(void) fprintf(stderr, "    If dataset name is specified, only that "
161 	    "dataset is dumped\n");
162 	(void) fprintf(stderr, "    If object numbers are specified, only "
163 	    "those objects are dumped\n\n");
164 	(void) fprintf(stderr, "    Options to control amount of output:\n");
165 	(void) fprintf(stderr, "        -b block statistics\n");
166 	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
167 	    "all data) blocks\n");
168 	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
169 	(void) fprintf(stderr, "        -d dataset(s)\n");
170 	(void) fprintf(stderr, "        -D dedup statistics\n");
171 	(void) fprintf(stderr, "        -E decode and display block from an "
172 	    "embedded block pointer\n");
173 	(void) fprintf(stderr, "        -h pool history\n");
174 	(void) fprintf(stderr, "        -i intent logs\n");
175 	(void) fprintf(stderr, "        -l read label contents\n");
176 	(void) fprintf(stderr, "        -k examine the checkpointed state "
177 	    "of the pool\n");
178 	(void) fprintf(stderr, "        -L disable leak tracking (do not "
179 	    "load spacemaps)\n");
180 	(void) fprintf(stderr, "        -m metaslabs\n");
181 	(void) fprintf(stderr, "        -M metaslab groups\n");
182 	(void) fprintf(stderr, "        -O perform object lookups by path\n");
183 	(void) fprintf(stderr, "        -R read and display block from a "
184 	    "device\n");
185 	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
186 	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
187 	(void) fprintf(stderr, "        -v verbose (applies to all "
188 	    "others)\n\n");
189 	(void) fprintf(stderr, "    Below options are intended for use "
190 	    "with other options:\n");
191 	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
192 	    "panic recovery (-AA) or both (-AAA)\n");
193 	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
194 	    "has altroot/not in a cachefile\n");
195 	(void) fprintf(stderr, "        -F attempt automatic rewind within "
196 	    "safe range of transaction groups\n");
197 	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
198 	    "exiting\n");
199 	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
200 	    "specify the maximum number of "
201 	    "checksumming I/Os [default is 200]\n");
202 	(void) fprintf(stderr, "        -o <variable>=<value> set global "
203 	    "variable to an unsigned 32-bit integer value\n");
204 	(void) fprintf(stderr, "        -p <path> -- use one or more with "
205 	    "-e to specify path to vdev dir\n");
206 	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
207 	(void) fprintf(stderr, "        -q don't print label contents\n");
208 	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
209 	    "searching for uberblocks\n");
210 	(void) fprintf(stderr, "        -u uberblock\n");
211 	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
212 	    "cachefile\n");
213 	(void) fprintf(stderr, "        -V do verbatim import\n");
214 	(void) fprintf(stderr, "        -x <dumpdir> -- "
215 	    "dump all read blocks into specified directory\n");
216 	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
217 	    "work with dataset)\n\n");
218 	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
219 	    "to make only that option verbose\n");
220 	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
221 	exit(1);
222 }
223 
224 static void
225 dump_debug_buffer()
226 {
227 	if (dump_opt['G']) {
228 		(void) printf("\n");
229 		zfs_dbgmsg_print("zdb");
230 	}
231 }
232 
233 /*
234  * Called for usage errors that are discovered after a call to spa_open(),
235  * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
236  */
237 
238 static void
239 fatal(const char *fmt, ...)
240 {
241 	va_list ap;
242 
243 	va_start(ap, fmt);
244 	(void) fprintf(stderr, "%s: ", cmdname);
245 	(void) vfprintf(stderr, fmt, ap);
246 	va_end(ap);
247 	(void) fprintf(stderr, "\n");
248 
249 	dump_debug_buffer();
250 
251 	exit(1);
252 }
253 
254 /* ARGSUSED */
255 static void
256 dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
257 {
258 	nvlist_t *nv;
259 	size_t nvsize = *(uint64_t *)data;
260 	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
261 
262 	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
263 
264 	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
265 
266 	umem_free(packed, nvsize);
267 
268 	dump_nvlist(nv, 8);
269 
270 	nvlist_free(nv);
271 }
272 
273 /* ARGSUSED */
274 static void
275 dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
276 {
277 	spa_history_phys_t *shp = data;
278 
279 	if (shp == NULL)
280 		return;
281 
282 	(void) printf("\t\tpool_create_len = %llu\n",
283 	    (u_longlong_t)shp->sh_pool_create_len);
284 	(void) printf("\t\tphys_max_off = %llu\n",
285 	    (u_longlong_t)shp->sh_phys_max_off);
286 	(void) printf("\t\tbof = %llu\n",
287 	    (u_longlong_t)shp->sh_bof);
288 	(void) printf("\t\teof = %llu\n",
289 	    (u_longlong_t)shp->sh_eof);
290 	(void) printf("\t\trecords_lost = %llu\n",
291 	    (u_longlong_t)shp->sh_records_lost);
292 }
293 
294 static void
295 zdb_nicenum(uint64_t num, char *buf, size_t buflen)
296 {
297 	if (dump_opt['P'])
298 		(void) snprintf(buf, buflen, "%llu", (longlong_t)num);
299 	else
300 		nicenum(num, buf, sizeof (buf));
301 }
302 
303 static const char histo_stars[] = "****************************************";
304 static const uint64_t histo_width = sizeof (histo_stars) - 1;
305 
306 static void
307 dump_histogram(const uint64_t *histo, int size, int offset)
308 {
309 	int i;
310 	int minidx = size - 1;
311 	int maxidx = 0;
312 	uint64_t max = 0;
313 
314 	for (i = 0; i < size; i++) {
315 		if (histo[i] > max)
316 			max = histo[i];
317 		if (histo[i] > 0 && i > maxidx)
318 			maxidx = i;
319 		if (histo[i] > 0 && i < minidx)
320 			minidx = i;
321 	}
322 
323 	if (max < histo_width)
324 		max = histo_width;
325 
326 	for (i = minidx; i <= maxidx; i++) {
327 		(void) printf("\t\t\t%3u: %6llu %s\n",
328 		    i + offset, (u_longlong_t)histo[i],
329 		    &histo_stars[(max - histo[i]) * histo_width / max]);
330 	}
331 }
332 
333 static void
334 dump_zap_stats(objset_t *os, uint64_t object)
335 {
336 	int error;
337 	zap_stats_t zs;
338 
339 	error = zap_get_stats(os, object, &zs);
340 	if (error)
341 		return;
342 
343 	if (zs.zs_ptrtbl_len == 0) {
344 		ASSERT(zs.zs_num_blocks == 1);
345 		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
346 		    (u_longlong_t)zs.zs_blocksize,
347 		    (u_longlong_t)zs.zs_num_entries);
348 		return;
349 	}
350 
351 	(void) printf("\tFat ZAP stats:\n");
352 
353 	(void) printf("\t\tPointer table:\n");
354 	(void) printf("\t\t\t%llu elements\n",
355 	    (u_longlong_t)zs.zs_ptrtbl_len);
356 	(void) printf("\t\t\tzt_blk: %llu\n",
357 	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
358 	(void) printf("\t\t\tzt_numblks: %llu\n",
359 	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
360 	(void) printf("\t\t\tzt_shift: %llu\n",
361 	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
362 	(void) printf("\t\t\tzt_blks_copied: %llu\n",
363 	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
364 	(void) printf("\t\t\tzt_nextblk: %llu\n",
365 	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
366 
367 	(void) printf("\t\tZAP entries: %llu\n",
368 	    (u_longlong_t)zs.zs_num_entries);
369 	(void) printf("\t\tLeaf blocks: %llu\n",
370 	    (u_longlong_t)zs.zs_num_leafs);
371 	(void) printf("\t\tTotal blocks: %llu\n",
372 	    (u_longlong_t)zs.zs_num_blocks);
373 	(void) printf("\t\tzap_block_type: 0x%llx\n",
374 	    (u_longlong_t)zs.zs_block_type);
375 	(void) printf("\t\tzap_magic: 0x%llx\n",
376 	    (u_longlong_t)zs.zs_magic);
377 	(void) printf("\t\tzap_salt: 0x%llx\n",
378 	    (u_longlong_t)zs.zs_salt);
379 
380 	(void) printf("\t\tLeafs with 2^n pointers:\n");
381 	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
382 
383 	(void) printf("\t\tBlocks with n*5 entries:\n");
384 	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
385 
386 	(void) printf("\t\tBlocks n/10 full:\n");
387 	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
388 
389 	(void) printf("\t\tEntries with n chunks:\n");
390 	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
391 
392 	(void) printf("\t\tBuckets with n entries:\n");
393 	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
394 }
395 
396 /*ARGSUSED*/
397 static void
398 dump_none(objset_t *os, uint64_t object, void *data, size_t size)
399 {
400 }
401 
402 /*ARGSUSED*/
403 static void
404 dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
405 {
406 	(void) printf("\tUNKNOWN OBJECT TYPE\n");
407 }
408 
409 /*ARGSUSED*/
410 static void
411 dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
412 {
413 }
414 
415 /*ARGSUSED*/
416 static void
417 dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
418 {
419 }
420 
421 /*ARGSUSED*/
422 static void
423 dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
424 {
425 	zap_cursor_t zc;
426 	zap_attribute_t attr;
427 	void *prop;
428 	unsigned i;
429 
430 	dump_zap_stats(os, object);
431 	(void) printf("\n");
432 
433 	for (zap_cursor_init(&zc, os, object);
434 	    zap_cursor_retrieve(&zc, &attr) == 0;
435 	    zap_cursor_advance(&zc)) {
436 		(void) printf("\t\t%s = ", attr.za_name);
437 		if (attr.za_num_integers == 0) {
438 			(void) printf("\n");
439 			continue;
440 		}
441 		prop = umem_zalloc(attr.za_num_integers *
442 		    attr.za_integer_length, UMEM_NOFAIL);
443 		(void) zap_lookup(os, object, attr.za_name,
444 		    attr.za_integer_length, attr.za_num_integers, prop);
445 		if (attr.za_integer_length == 1) {
446 			(void) printf("%s", (char *)prop);
447 		} else {
448 			for (i = 0; i < attr.za_num_integers; i++) {
449 				switch (attr.za_integer_length) {
450 				case 2:
451 					(void) printf("%u ",
452 					    ((uint16_t *)prop)[i]);
453 					break;
454 				case 4:
455 					(void) printf("%u ",
456 					    ((uint32_t *)prop)[i]);
457 					break;
458 				case 8:
459 					(void) printf("%lld ",
460 					    (u_longlong_t)((int64_t *)prop)[i]);
461 					break;
462 				}
463 			}
464 		}
465 		(void) printf("\n");
466 		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
467 	}
468 	zap_cursor_fini(&zc);
469 }
470 
471 static void
472 dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
473 {
474 	bpobj_phys_t *bpop = data;
475 	char bytes[32], comp[32], uncomp[32];
476 
477 	/* make sure the output won't get truncated */
478 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
479 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
480 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
481 
482 	if (bpop == NULL)
483 		return;
484 
485 	zdb_nicenum(bpop->bpo_bytes, bytes, sizeof (bytes));
486 	zdb_nicenum(bpop->bpo_comp, comp, sizeof (comp));
487 	zdb_nicenum(bpop->bpo_uncomp, uncomp, sizeof (uncomp));
488 
489 	(void) printf("\t\tnum_blkptrs = %llu\n",
490 	    (u_longlong_t)bpop->bpo_num_blkptrs);
491 	(void) printf("\t\tbytes = %s\n", bytes);
492 	if (size >= BPOBJ_SIZE_V1) {
493 		(void) printf("\t\tcomp = %s\n", comp);
494 		(void) printf("\t\tuncomp = %s\n", uncomp);
495 	}
496 	if (size >= sizeof (*bpop)) {
497 		(void) printf("\t\tsubobjs = %llu\n",
498 		    (u_longlong_t)bpop->bpo_subobjs);
499 		(void) printf("\t\tnum_subobjs = %llu\n",
500 		    (u_longlong_t)bpop->bpo_num_subobjs);
501 	}
502 
503 	if (dump_opt['d'] < 5)
504 		return;
505 
506 	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
507 		char blkbuf[BP_SPRINTF_LEN];
508 		blkptr_t bp;
509 
510 		int err = dmu_read(os, object,
511 		    i * sizeof (bp), sizeof (bp), &bp, 0);
512 		if (err != 0) {
513 			(void) printf("got error %u from dmu_read\n", err);
514 			break;
515 		}
516 		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
517 		(void) printf("\t%s\n", blkbuf);
518 	}
519 }
520 
521 /* ARGSUSED */
522 static void
523 dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
524 {
525 	dmu_object_info_t doi;
526 
527 	VERIFY0(dmu_object_info(os, object, &doi));
528 	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
529 
530 	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
531 	if (err != 0) {
532 		(void) printf("got error %u from dmu_read\n", err);
533 		kmem_free(subobjs, doi.doi_max_offset);
534 		return;
535 	}
536 
537 	int64_t last_nonzero = -1;
538 	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
539 		if (subobjs[i] != 0)
540 			last_nonzero = i;
541 	}
542 
543 	for (int64_t i = 0; i <= last_nonzero; i++) {
544 		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
545 	}
546 	kmem_free(subobjs, doi.doi_max_offset);
547 }
548 
549 /*ARGSUSED*/
550 static void
551 dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
552 {
553 	dump_zap_stats(os, object);
554 	/* contents are printed elsewhere, properly decoded */
555 }
556 
557 /*ARGSUSED*/
558 static void
559 dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
560 {
561 	zap_cursor_t zc;
562 	zap_attribute_t attr;
563 
564 	dump_zap_stats(os, object);
565 	(void) printf("\n");
566 
567 	for (zap_cursor_init(&zc, os, object);
568 	    zap_cursor_retrieve(&zc, &attr) == 0;
569 	    zap_cursor_advance(&zc)) {
570 		(void) printf("\t\t%s = ", attr.za_name);
571 		if (attr.za_num_integers == 0) {
572 			(void) printf("\n");
573 			continue;
574 		}
575 		(void) printf(" %llx : [%d:%d:%d]\n",
576 		    (u_longlong_t)attr.za_first_integer,
577 		    (int)ATTR_LENGTH(attr.za_first_integer),
578 		    (int)ATTR_BSWAP(attr.za_first_integer),
579 		    (int)ATTR_NUM(attr.za_first_integer));
580 	}
581 	zap_cursor_fini(&zc);
582 }
583 
584 /*ARGSUSED*/
585 static void
586 dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
587 {
588 	zap_cursor_t zc;
589 	zap_attribute_t attr;
590 	uint16_t *layout_attrs;
591 	unsigned i;
592 
593 	dump_zap_stats(os, object);
594 	(void) printf("\n");
595 
596 	for (zap_cursor_init(&zc, os, object);
597 	    zap_cursor_retrieve(&zc, &attr) == 0;
598 	    zap_cursor_advance(&zc)) {
599 		(void) printf("\t\t%s = [", attr.za_name);
600 		if (attr.za_num_integers == 0) {
601 			(void) printf("\n");
602 			continue;
603 		}
604 
605 		VERIFY(attr.za_integer_length == 2);
606 		layout_attrs = umem_zalloc(attr.za_num_integers *
607 		    attr.za_integer_length, UMEM_NOFAIL);
608 
609 		VERIFY(zap_lookup(os, object, attr.za_name,
610 		    attr.za_integer_length,
611 		    attr.za_num_integers, layout_attrs) == 0);
612 
613 		for (i = 0; i != attr.za_num_integers; i++)
614 			(void) printf(" %d ", (int)layout_attrs[i]);
615 		(void) printf("]\n");
616 		umem_free(layout_attrs,
617 		    attr.za_num_integers * attr.za_integer_length);
618 	}
619 	zap_cursor_fini(&zc);
620 }
621 
622 /*ARGSUSED*/
623 static void
624 dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
625 {
626 	zap_cursor_t zc;
627 	zap_attribute_t attr;
628 	const char *typenames[] = {
629 		/* 0 */ "not specified",
630 		/* 1 */ "FIFO",
631 		/* 2 */ "Character Device",
632 		/* 3 */ "3 (invalid)",
633 		/* 4 */ "Directory",
634 		/* 5 */ "5 (invalid)",
635 		/* 6 */ "Block Device",
636 		/* 7 */ "7 (invalid)",
637 		/* 8 */ "Regular File",
638 		/* 9 */ "9 (invalid)",
639 		/* 10 */ "Symbolic Link",
640 		/* 11 */ "11 (invalid)",
641 		/* 12 */ "Socket",
642 		/* 13 */ "Door",
643 		/* 14 */ "Event Port",
644 		/* 15 */ "15 (invalid)",
645 	};
646 
647 	dump_zap_stats(os, object);
648 	(void) printf("\n");
649 
650 	for (zap_cursor_init(&zc, os, object);
651 	    zap_cursor_retrieve(&zc, &attr) == 0;
652 	    zap_cursor_advance(&zc)) {
653 		(void) printf("\t\t%s = %lld (type: %s)\n",
654 		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
655 		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
656 	}
657 	zap_cursor_fini(&zc);
658 }
659 
660 static int
661 get_dtl_refcount(vdev_t *vd)
662 {
663 	int refcount = 0;
664 
665 	if (vd->vdev_ops->vdev_op_leaf) {
666 		space_map_t *sm = vd->vdev_dtl_sm;
667 
668 		if (sm != NULL &&
669 		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
670 			return (1);
671 		return (0);
672 	}
673 
674 	for (unsigned c = 0; c < vd->vdev_children; c++)
675 		refcount += get_dtl_refcount(vd->vdev_child[c]);
676 	return (refcount);
677 }
678 
679 static int
680 get_metaslab_refcount(vdev_t *vd)
681 {
682 	int refcount = 0;
683 
684 	if (vd->vdev_top == vd) {
685 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
686 			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
687 
688 			if (sm != NULL &&
689 			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
690 				refcount++;
691 		}
692 	}
693 	for (unsigned c = 0; c < vd->vdev_children; c++)
694 		refcount += get_metaslab_refcount(vd->vdev_child[c]);
695 
696 	return (refcount);
697 }
698 
699 static int
700 get_obsolete_refcount(vdev_t *vd)
701 {
702 	int refcount = 0;
703 
704 	uint64_t obsolete_sm_obj = vdev_obsolete_sm_object(vd);
705 	if (vd->vdev_top == vd && obsolete_sm_obj != 0) {
706 		dmu_object_info_t doi;
707 		VERIFY0(dmu_object_info(vd->vdev_spa->spa_meta_objset,
708 		    obsolete_sm_obj, &doi));
709 		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
710 			refcount++;
711 		}
712 	} else {
713 		ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
714 		ASSERT3U(obsolete_sm_obj, ==, 0);
715 	}
716 	for (unsigned c = 0; c < vd->vdev_children; c++) {
717 		refcount += get_obsolete_refcount(vd->vdev_child[c]);
718 	}
719 
720 	return (refcount);
721 }
722 
723 static int
724 get_prev_obsolete_spacemap_refcount(spa_t *spa)
725 {
726 	uint64_t prev_obj =
727 	    spa->spa_condensing_indirect_phys.scip_prev_obsolete_sm_object;
728 	if (prev_obj != 0) {
729 		dmu_object_info_t doi;
730 		VERIFY0(dmu_object_info(spa->spa_meta_objset, prev_obj, &doi));
731 		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
732 			return (1);
733 		}
734 	}
735 	return (0);
736 }
737 
738 static int
739 get_checkpoint_refcount(vdev_t *vd)
740 {
741 	int refcount = 0;
742 
743 	if (vd->vdev_top == vd && vd->vdev_top_zap != 0 &&
744 	    zap_contains(spa_meta_objset(vd->vdev_spa),
745 	    vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) == 0)
746 		refcount++;
747 
748 	for (uint64_t c = 0; c < vd->vdev_children; c++)
749 		refcount += get_checkpoint_refcount(vd->vdev_child[c]);
750 
751 	return (refcount);
752 }
753 
754 static int
755 verify_spacemap_refcounts(spa_t *spa)
756 {
757 	uint64_t expected_refcount = 0;
758 	uint64_t actual_refcount;
759 
760 	(void) feature_get_refcount(spa,
761 	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
762 	    &expected_refcount);
763 	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
764 	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
765 	actual_refcount += get_obsolete_refcount(spa->spa_root_vdev);
766 	actual_refcount += get_prev_obsolete_spacemap_refcount(spa);
767 	actual_refcount += get_checkpoint_refcount(spa->spa_root_vdev);
768 
769 	if (expected_refcount != actual_refcount) {
770 		(void) printf("space map refcount mismatch: expected %lld != "
771 		    "actual %lld\n",
772 		    (longlong_t)expected_refcount,
773 		    (longlong_t)actual_refcount);
774 		return (2);
775 	}
776 	return (0);
777 }
778 
779 static void
780 dump_spacemap(objset_t *os, space_map_t *sm)
781 {
782 	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
783 	    "INVALID", "INVALID", "INVALID", "INVALID" };
784 
785 	if (sm == NULL)
786 		return;
787 
788 	(void) printf("space map object %llu:\n",
789 	    (longlong_t)sm->sm_object);
790 	(void) printf("  smp_length = 0x%llx\n",
791 	    (longlong_t)sm->sm_phys->smp_length);
792 	(void) printf("  smp_alloc = 0x%llx\n",
793 	    (longlong_t)sm->sm_phys->smp_alloc);
794 
795 	if (dump_opt['d'] < 6 && dump_opt['m'] < 4)
796 		return;
797 
798 	/*
799 	 * Print out the freelist entries in both encoded and decoded form.
800 	 */
801 	uint8_t mapshift = sm->sm_shift;
802 	int64_t alloc = 0;
803 	uint64_t word, entry_id = 0;
804 	for (uint64_t offset = 0; offset < space_map_length(sm);
805 	    offset += sizeof (word)) {
806 
807 		VERIFY0(dmu_read(os, space_map_object(sm), offset,
808 		    sizeof (word), &word, DMU_READ_PREFETCH));
809 
810 		if (sm_entry_is_debug(word)) {
811 			(void) printf("\t    [%6llu] %s: txg %llu pass %llu\n",
812 			    (u_longlong_t)entry_id,
813 			    ddata[SM_DEBUG_ACTION_DECODE(word)],
814 			    (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
815 			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
816 			entry_id++;
817 			continue;
818 		}
819 
820 		uint8_t words;
821 		char entry_type;
822 		uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;
823 
824 		if (sm_entry_is_single_word(word)) {
825 			entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
826 			    'A' : 'F';
827 			entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
828 			    sm->sm_start;
829 			entry_run = SM_RUN_DECODE(word) << mapshift;
830 			words = 1;
831 		} else {
832 			/* it is a two-word entry so we read another word */
833 			ASSERT(sm_entry_is_double_word(word));
834 
835 			uint64_t extra_word;
836 			offset += sizeof (extra_word);
837 			VERIFY0(dmu_read(os, space_map_object(sm), offset,
838 			    sizeof (extra_word), &extra_word,
839 			    DMU_READ_PREFETCH));
840 
841 			ASSERT3U(offset, <=, space_map_length(sm));
842 
843 			entry_run = SM2_RUN_DECODE(word) << mapshift;
844 			entry_vdev = SM2_VDEV_DECODE(word);
845 			entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
846 			    'A' : 'F';
847 			entry_off = (SM2_OFFSET_DECODE(extra_word) <<
848 			    mapshift) + sm->sm_start;
849 			words = 2;
850 		}
851 
852 		(void) printf("\t    [%6llu]    %c  range:"
853 		    " %010llx-%010llx  size: %06llx vdev: %06llu words: %u\n",
854 		    (u_longlong_t)entry_id,
855 		    entry_type, (u_longlong_t)entry_off,
856 		    (u_longlong_t)(entry_off + entry_run),
857 		    (u_longlong_t)entry_run,
858 		    (u_longlong_t)entry_vdev, words);
859 
860 		if (entry_type == 'A')
861 			alloc += entry_run;
862 		else
863 			alloc -= entry_run;
864 		entry_id++;
865 	}
866 	if (alloc != space_map_allocated(sm)) {
867 		(void) printf("space_map_object alloc (%lld) INCONSISTENT "
868 		    "with space map summary (%lld)\n",
869 		    (longlong_t)space_map_allocated(sm), (longlong_t)alloc);
870 	}
871 }
872 
873 static void
874 dump_metaslab_stats(metaslab_t *msp)
875 {
876 	char maxbuf[32];
877 	range_tree_t *rt = msp->ms_allocatable;
878 	avl_tree_t *t = &msp->ms_allocatable_by_size;
879 	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
880 
881 	/* max sure nicenum has enough space */
882 	CTASSERT(sizeof (maxbuf) >= NN_NUMBUF_SZ);
883 
884 	zdb_nicenum(metaslab_block_maxsize(msp), maxbuf, sizeof (maxbuf));
885 
886 	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
887 	    "segments", avl_numnodes(t), "maxsize", maxbuf,
888 	    "freepct", free_pct);
889 	(void) printf("\tIn-memory histogram:\n");
890 	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
891 }
892 
893 static void
894 dump_metaslab(metaslab_t *msp)
895 {
896 	vdev_t *vd = msp->ms_group->mg_vd;
897 	spa_t *spa = vd->vdev_spa;
898 	space_map_t *sm = msp->ms_sm;
899 	char freebuf[32];
900 
901 	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf,
902 	    sizeof (freebuf));
903 
904 	(void) printf(
905 	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
906 	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
907 	    (u_longlong_t)space_map_object(sm), freebuf);
908 
909 	if (dump_opt['m'] > 2 && !dump_opt['L']) {
910 		mutex_enter(&msp->ms_lock);
911 		VERIFY0(metaslab_load(msp));
912 		range_tree_stat_verify(msp->ms_allocatable);
913 		dump_metaslab_stats(msp);
914 		metaslab_unload(msp);
915 		mutex_exit(&msp->ms_lock);
916 	}
917 
918 	if (dump_opt['m'] > 1 && sm != NULL &&
919 	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
920 		/*
921 		 * The space map histogram represents free space in chunks
922 		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
923 		 */
924 		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
925 		    (u_longlong_t)msp->ms_fragmentation);
926 		dump_histogram(sm->sm_phys->smp_histogram,
927 		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
928 	}
929 
930 	ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
931 	dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
932 }
933 
934 static void
935 print_vdev_metaslab_header(vdev_t *vd)
936 {
937 	vdev_alloc_bias_t alloc_bias = vd->vdev_alloc_bias;
938 	const char *bias_str;
939 
940 	bias_str = (alloc_bias == VDEV_BIAS_LOG || vd->vdev_islog) ?
941 	    VDEV_ALLOC_BIAS_LOG :
942 	    (alloc_bias == VDEV_BIAS_SPECIAL) ? VDEV_ALLOC_BIAS_SPECIAL :
943 	    (alloc_bias == VDEV_BIAS_DEDUP) ? VDEV_ALLOC_BIAS_DEDUP :
944 	    vd->vdev_islog ? "log" : "";
945 
946 	(void) printf("\tvdev %10llu   %s\n"
947 	    "\t%-10s%5llu   %-19s   %-15s   %-12s\n",
948 	    (u_longlong_t)vd->vdev_id, bias_str,
949 	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
950 	    "offset", "spacemap", "free");
951 	(void) printf("\t%15s   %19s   %15s   %12s\n",
952 	    "---------------", "-------------------",
953 	    "---------------", "------------");
954 }
955 
956 static void
957 dump_metaslab_groups(spa_t *spa)
958 {
959 	vdev_t *rvd = spa->spa_root_vdev;
960 	metaslab_class_t *mc = spa_normal_class(spa);
961 	uint64_t fragmentation;
962 
963 	metaslab_class_histogram_verify(mc);
964 
965 	for (unsigned c = 0; c < rvd->vdev_children; c++) {
966 		vdev_t *tvd = rvd->vdev_child[c];
967 		metaslab_group_t *mg = tvd->vdev_mg;
968 
969 		if (mg == NULL || mg->mg_class != mc)
970 			continue;
971 
972 		metaslab_group_histogram_verify(mg);
973 		mg->mg_fragmentation = metaslab_group_fragmentation(mg);
974 
975 		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
976 		    "fragmentation",
977 		    (u_longlong_t)tvd->vdev_id,
978 		    (u_longlong_t)tvd->vdev_ms_count);
979 		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
980 			(void) printf("%3s\n", "-");
981 		} else {
982 			(void) printf("%3llu%%\n",
983 			    (u_longlong_t)mg->mg_fragmentation);
984 		}
985 		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
986 	}
987 
988 	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
989 	fragmentation = metaslab_class_fragmentation(mc);
990 	if (fragmentation == ZFS_FRAG_INVALID)
991 		(void) printf("\t%3s\n", "-");
992 	else
993 		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
994 	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
995 }
996 
997 static void
998 print_vdev_indirect(vdev_t *vd)
999 {
1000 	vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
1001 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
1002 	vdev_indirect_births_t *vib = vd->vdev_indirect_births;
1003 
1004 	if (vim == NULL) {
1005 		ASSERT3P(vib, ==, NULL);
1006 		return;
1007 	}
1008 
1009 	ASSERT3U(vdev_indirect_mapping_object(vim), ==,
1010 	    vic->vic_mapping_object);
1011 	ASSERT3U(vdev_indirect_births_object(vib), ==,
1012 	    vic->vic_births_object);
1013 
1014 	(void) printf("indirect births obj %llu:\n",
1015 	    (longlong_t)vic->vic_births_object);
1016 	(void) printf("    vib_count = %llu\n",
1017 	    (longlong_t)vdev_indirect_births_count(vib));
1018 	for (uint64_t i = 0; i < vdev_indirect_births_count(vib); i++) {
1019 		vdev_indirect_birth_entry_phys_t *cur_vibe =
1020 		    &vib->vib_entries[i];
1021 		(void) printf("\toffset %llx -> txg %llu\n",
1022 		    (longlong_t)cur_vibe->vibe_offset,
1023 		    (longlong_t)cur_vibe->vibe_phys_birth_txg);
1024 	}
1025 	(void) printf("\n");
1026 
1027 	(void) printf("indirect mapping obj %llu:\n",
1028 	    (longlong_t)vic->vic_mapping_object);
1029 	(void) printf("    vim_max_offset = 0x%llx\n",
1030 	    (longlong_t)vdev_indirect_mapping_max_offset(vim));
1031 	(void) printf("    vim_bytes_mapped = 0x%llx\n",
1032 	    (longlong_t)vdev_indirect_mapping_bytes_mapped(vim));
1033 	(void) printf("    vim_count = %llu\n",
1034 	    (longlong_t)vdev_indirect_mapping_num_entries(vim));
1035 
1036 	if (dump_opt['d'] <= 5 && dump_opt['m'] <= 3)
1037 		return;
1038 
1039 	uint32_t *counts = vdev_indirect_mapping_load_obsolete_counts(vim);
1040 
1041 	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
1042 		vdev_indirect_mapping_entry_phys_t *vimep =
1043 		    &vim->vim_entries[i];
1044 		(void) printf("\t<%llx:%llx:%llx> -> "
1045 		    "<%llx:%llx:%llx> (%x obsolete)\n",
1046 		    (longlong_t)vd->vdev_id,
1047 		    (longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
1048 		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1049 		    (longlong_t)DVA_GET_VDEV(&vimep->vimep_dst),
1050 		    (longlong_t)DVA_GET_OFFSET(&vimep->vimep_dst),
1051 		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1052 		    counts[i]);
1053 	}
1054 	(void) printf("\n");
1055 
1056 	uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd);
1057 	if (obsolete_sm_object != 0) {
1058 		objset_t *mos = vd->vdev_spa->spa_meta_objset;
1059 		(void) printf("obsolete space map object %llu:\n",
1060 		    (u_longlong_t)obsolete_sm_object);
1061 		ASSERT(vd->vdev_obsolete_sm != NULL);
1062 		ASSERT3U(space_map_object(vd->vdev_obsolete_sm), ==,
1063 		    obsolete_sm_object);
1064 		dump_spacemap(mos, vd->vdev_obsolete_sm);
1065 		(void) printf("\n");
1066 	}
1067 }
1068 
1069 static void
1070 dump_metaslabs(spa_t *spa)
1071 {
1072 	vdev_t *vd, *rvd = spa->spa_root_vdev;
1073 	uint64_t m, c = 0, children = rvd->vdev_children;
1074 
1075 	(void) printf("\nMetaslabs:\n");
1076 
1077 	if (!dump_opt['d'] && zopt_objects > 0) {
1078 		c = zopt_object[0];
1079 
1080 		if (c >= children)
1081 			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
1082 
1083 		if (zopt_objects > 1) {
1084 			vd = rvd->vdev_child[c];
1085 			print_vdev_metaslab_header(vd);
1086 
1087 			for (m = 1; m < zopt_objects; m++) {
1088 				if (zopt_object[m] < vd->vdev_ms_count)
1089 					dump_metaslab(
1090 					    vd->vdev_ms[zopt_object[m]]);
1091 				else
1092 					(void) fprintf(stderr, "bad metaslab "
1093 					    "number %llu\n",
1094 					    (u_longlong_t)zopt_object[m]);
1095 			}
1096 			(void) printf("\n");
1097 			return;
1098 		}
1099 		children = c + 1;
1100 	}
1101 	for (; c < children; c++) {
1102 		vd = rvd->vdev_child[c];
1103 		print_vdev_metaslab_header(vd);
1104 
1105 		print_vdev_indirect(vd);
1106 
1107 		for (m = 0; m < vd->vdev_ms_count; m++)
1108 			dump_metaslab(vd->vdev_ms[m]);
1109 		(void) printf("\n");
1110 	}
1111 }
1112 
1113 static void
1114 dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
1115 {
1116 	const ddt_phys_t *ddp = dde->dde_phys;
1117 	const ddt_key_t *ddk = &dde->dde_key;
1118 	const char *types[4] = { "ditto", "single", "double", "triple" };
1119 	char blkbuf[BP_SPRINTF_LEN];
1120 	blkptr_t blk;
1121 
1122 	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
1123 		if (ddp->ddp_phys_birth == 0)
1124 			continue;
1125 		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
1126 		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
1127 		(void) printf("index %llx refcnt %llu %s %s\n",
1128 		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
1129 		    types[p], blkbuf);
1130 	}
1131 }
1132 
1133 static void
1134 dump_dedup_ratio(const ddt_stat_t *dds)
1135 {
1136 	double rL, rP, rD, D, dedup, compress, copies;
1137 
1138 	if (dds->dds_blocks == 0)
1139 		return;
1140 
1141 	rL = (double)dds->dds_ref_lsize;
1142 	rP = (double)dds->dds_ref_psize;
1143 	rD = (double)dds->dds_ref_dsize;
1144 	D = (double)dds->dds_dsize;
1145 
1146 	dedup = rD / D;
1147 	compress = rL / rP;
1148 	copies = rD / rP;
1149 
1150 	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
1151 	    "dedup * compress / copies = %.2f\n\n",
1152 	    dedup, compress, copies, dedup * compress / copies);
1153 }
1154 
1155 static void
1156 dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
1157 {
1158 	char name[DDT_NAMELEN];
1159 	ddt_entry_t dde;
1160 	uint64_t walk = 0;
1161 	dmu_object_info_t doi;
1162 	uint64_t count, dspace, mspace;
1163 	int error;
1164 
1165 	error = ddt_object_info(ddt, type, class, &doi);
1166 
1167 	if (error == ENOENT)
1168 		return;
1169 	ASSERT(error == 0);
1170 
1171 	if ((count = ddt_object_count(ddt, type, class)) == 0)
1172 		return;
1173 
1174 	dspace = doi.doi_physical_blocks_512 << 9;
1175 	mspace = doi.doi_fill_count * doi.doi_data_block_size;
1176 
1177 	ddt_object_name(ddt, type, class, name);
1178 
1179 	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
1180 	    name,
1181 	    (u_longlong_t)count,
1182 	    (u_longlong_t)(dspace / count),
1183 	    (u_longlong_t)(mspace / count));
1184 
1185 	if (dump_opt['D'] < 3)
1186 		return;
1187 
1188 	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
1189 
1190 	if (dump_opt['D'] < 4)
1191 		return;
1192 
1193 	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
1194 		return;
1195 
1196 	(void) printf("%s contents:\n\n", name);
1197 
1198 	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
1199 		dump_dde(ddt, &dde, walk);
1200 
1201 	ASSERT3U(error, ==, ENOENT);
1202 
1203 	(void) printf("\n");
1204 }
1205 
1206 static void
1207 dump_all_ddts(spa_t *spa)
1208 {
1209 	ddt_histogram_t ddh_total;
1210 	ddt_stat_t dds_total;
1211 
1212 	bzero(&ddh_total, sizeof (ddh_total));
1213 	bzero(&dds_total, sizeof (dds_total));
1214 
1215 	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
1216 		ddt_t *ddt = spa->spa_ddt[c];
1217 		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
1218 			for (enum ddt_class class = 0; class < DDT_CLASSES;
1219 			    class++) {
1220 				dump_ddt(ddt, type, class);
1221 			}
1222 		}
1223 	}
1224 
1225 	ddt_get_dedup_stats(spa, &dds_total);
1226 
1227 	if (dds_total.dds_blocks == 0) {
1228 		(void) printf("All DDTs are empty\n");
1229 		return;
1230 	}
1231 
1232 	(void) printf("\n");
1233 
1234 	if (dump_opt['D'] > 1) {
1235 		(void) printf("DDT histogram (aggregated over all DDTs):\n");
1236 		ddt_get_dedup_histogram(spa, &ddh_total);
1237 		zpool_dump_ddt(&dds_total, &ddh_total);
1238 	}
1239 
1240 	dump_dedup_ratio(&dds_total);
1241 }
1242 
1243 static void
1244 dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1245 {
1246 	char *prefix = arg;
1247 
1248 	(void) printf("%s [%llu,%llu) length %llu\n",
1249 	    prefix,
1250 	    (u_longlong_t)start,
1251 	    (u_longlong_t)(start + size),
1252 	    (u_longlong_t)(size));
1253 }
1254 
1255 static void
1256 dump_dtl(vdev_t *vd, int indent)
1257 {
1258 	spa_t *spa = vd->vdev_spa;
1259 	boolean_t required;
1260 	const char *name[DTL_TYPES] = { "missing", "partial", "scrub",
1261 		"outage" };
1262 	char prefix[256];
1263 
1264 	spa_vdev_state_enter(spa, SCL_NONE);
1265 	required = vdev_dtl_required(vd);
1266 	(void) spa_vdev_state_exit(spa, NULL, 0);
1267 
1268 	if (indent == 0)
1269 		(void) printf("\nDirty time logs:\n\n");
1270 
1271 	(void) printf("\t%*s%s [%s]\n", indent, "",
1272 	    vd->vdev_path ? vd->vdev_path :
1273 	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1274 	    required ? "DTL-required" : "DTL-expendable");
1275 
1276 	for (int t = 0; t < DTL_TYPES; t++) {
1277 		range_tree_t *rt = vd->vdev_dtl[t];
1278 		if (range_tree_space(rt) == 0)
1279 			continue;
1280 		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1281 		    indent + 2, "", name[t]);
1282 		range_tree_walk(rt, dump_dtl_seg, prefix);
1283 		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1284 			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1285 	}
1286 
1287 	for (unsigned c = 0; c < vd->vdev_children; c++)
1288 		dump_dtl(vd->vdev_child[c], indent + 4);
1289 }
1290 
1291 static void
1292 dump_history(spa_t *spa)
1293 {
1294 	nvlist_t **events = NULL;
1295 	uint64_t resid, len, off = 0;
1296 	uint_t num = 0;
1297 	int error;
1298 	time_t tsec;
1299 	struct tm t;
1300 	char tbuf[30];
1301 	char internalstr[MAXPATHLEN];
1302 
1303 	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
1304 	do {
1305 		len = SPA_MAXBLOCKSIZE;
1306 
1307 		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1308 			(void) fprintf(stderr, "Unable to read history: "
1309 			    "error %d\n", error);
1310 			umem_free(buf, SPA_MAXBLOCKSIZE);
1311 			return;
1312 		}
1313 
1314 		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1315 			break;
1316 
1317 		off -= resid;
1318 	} while (len != 0);
1319 	umem_free(buf, SPA_MAXBLOCKSIZE);
1320 
1321 	(void) printf("\nHistory:\n");
1322 	for (unsigned i = 0; i < num; i++) {
1323 		uint64_t time, txg, ievent;
1324 		char *cmd, *intstr;
1325 		boolean_t printed = B_FALSE;
1326 
1327 		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1328 		    &time) != 0)
1329 			goto next;
1330 		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1331 		    &cmd) != 0) {
1332 			if (nvlist_lookup_uint64(events[i],
1333 			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1334 				goto next;
1335 			verify(nvlist_lookup_uint64(events[i],
1336 			    ZPOOL_HIST_TXG, &txg) == 0);
1337 			verify(nvlist_lookup_string(events[i],
1338 			    ZPOOL_HIST_INT_STR, &intstr) == 0);
1339 			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1340 				goto next;
1341 
1342 			(void) snprintf(internalstr,
1343 			    sizeof (internalstr),
1344 			    "[internal %s txg:%ju] %s",
1345 			    zfs_history_event_names[ievent], (uintmax_t)txg,
1346 			    intstr);
1347 			cmd = internalstr;
1348 		}
1349 		tsec = time;
1350 		(void) localtime_r(&tsec, &t);
1351 		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1352 		(void) printf("%s %s\n", tbuf, cmd);
1353 		printed = B_TRUE;
1354 
1355 next:
1356 		if (dump_opt['h'] > 1) {
1357 			if (!printed)
1358 				(void) printf("unrecognized record:\n");
1359 			dump_nvlist(events[i], 2);
1360 		}
1361 	}
1362 }
1363 
1364 /*ARGSUSED*/
1365 static void
1366 dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1367 {
1368 }
1369 
1370 static uint64_t
1371 blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1372     const zbookmark_phys_t *zb)
1373 {
1374 	if (dnp == NULL) {
1375 		ASSERT(zb->zb_level < 0);
1376 		if (zb->zb_object == 0)
1377 			return (zb->zb_blkid);
1378 		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1379 	}
1380 
1381 	ASSERT(zb->zb_level >= 0);
1382 
1383 	return ((zb->zb_blkid <<
1384 	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1385 	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1386 }
1387 
1388 static void
1389 snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1390 {
1391 	const dva_t *dva = bp->blk_dva;
1392 	unsigned int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1393 
1394 	if (dump_opt['b'] >= 6) {
1395 		snprintf_blkptr(blkbuf, buflen, bp);
1396 		return;
1397 	}
1398 
1399 	if (BP_IS_EMBEDDED(bp)) {
1400 		(void) sprintf(blkbuf,
1401 		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
1402 		    (int)BPE_GET_ETYPE(bp),
1403 		    (u_longlong_t)BPE_GET_LSIZE(bp),
1404 		    (u_longlong_t)BPE_GET_PSIZE(bp),
1405 		    (u_longlong_t)bp->blk_birth);
1406 		return;
1407 	}
1408 
1409 	blkbuf[0] = '\0';
1410 	for (unsigned int i = 0; i < ndvas; i++)
1411 		(void) snprintf(blkbuf + strlen(blkbuf),
1412 		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1413 		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1414 		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1415 		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1416 
1417 	if (BP_IS_HOLE(bp)) {
1418 		(void) snprintf(blkbuf + strlen(blkbuf),
1419 		    buflen - strlen(blkbuf),
1420 		    "%llxL B=%llu",
1421 		    (u_longlong_t)BP_GET_LSIZE(bp),
1422 		    (u_longlong_t)bp->blk_birth);
1423 	} else {
1424 		(void) snprintf(blkbuf + strlen(blkbuf),
1425 		    buflen - strlen(blkbuf),
1426 		    "%llxL/%llxP F=%llu B=%llu/%llu",
1427 		    (u_longlong_t)BP_GET_LSIZE(bp),
1428 		    (u_longlong_t)BP_GET_PSIZE(bp),
1429 		    (u_longlong_t)BP_GET_FILL(bp),
1430 		    (u_longlong_t)bp->blk_birth,
1431 		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1432 	}
1433 }
1434 
1435 static void
1436 print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1437     const dnode_phys_t *dnp)
1438 {
1439 	char blkbuf[BP_SPRINTF_LEN];
1440 	int l;
1441 
1442 	if (!BP_IS_EMBEDDED(bp)) {
1443 		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1444 		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1445 	}
1446 
1447 	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1448 
1449 	ASSERT(zb->zb_level >= 0);
1450 
1451 	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1452 		if (l == zb->zb_level) {
1453 			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1454 		} else {
1455 			(void) printf(" ");
1456 		}
1457 	}
1458 
1459 	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1460 	(void) printf("%s\n", blkbuf);
1461 }
1462 
1463 static int
1464 visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1465     blkptr_t *bp, const zbookmark_phys_t *zb)
1466 {
1467 	int err = 0;
1468 
1469 	if (bp->blk_birth == 0)
1470 		return (0);
1471 
1472 	print_indirect(bp, zb, dnp);
1473 
1474 	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1475 		arc_flags_t flags = ARC_FLAG_WAIT;
1476 		int i;
1477 		blkptr_t *cbp;
1478 		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1479 		arc_buf_t *buf;
1480 		uint64_t fill = 0;
1481 
1482 		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1483 		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1484 		if (err)
1485 			return (err);
1486 		ASSERT(buf->b_data);
1487 
1488 		/* recursively visit blocks below this */
1489 		cbp = buf->b_data;
1490 		for (i = 0; i < epb; i++, cbp++) {
1491 			zbookmark_phys_t czb;
1492 
1493 			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1494 			    zb->zb_level - 1,
1495 			    zb->zb_blkid * epb + i);
1496 			err = visit_indirect(spa, dnp, cbp, &czb);
1497 			if (err)
1498 				break;
1499 			fill += BP_GET_FILL(cbp);
1500 		}
1501 		if (!err)
1502 			ASSERT3U(fill, ==, BP_GET_FILL(bp));
1503 		arc_buf_destroy(buf, &buf);
1504 	}
1505 
1506 	return (err);
1507 }
1508 
1509 /*ARGSUSED*/
1510 static void
1511 dump_indirect(dnode_t *dn)
1512 {
1513 	dnode_phys_t *dnp = dn->dn_phys;
1514 	int j;
1515 	zbookmark_phys_t czb;
1516 
1517 	(void) printf("Indirect blocks:\n");
1518 
1519 	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1520 	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1521 	for (j = 0; j < dnp->dn_nblkptr; j++) {
1522 		czb.zb_blkid = j;
1523 		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1524 		    &dnp->dn_blkptr[j], &czb);
1525 	}
1526 
1527 	(void) printf("\n");
1528 }
1529 
1530 /*ARGSUSED*/
1531 static void
1532 dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1533 {
1534 	dsl_dir_phys_t *dd = data;
1535 	time_t crtime;
1536 	char nice[32];
1537 
1538 	/* make sure nicenum has enough space */
1539 	CTASSERT(sizeof (nice) >= NN_NUMBUF_SZ);
1540 
1541 	if (dd == NULL)
1542 		return;
1543 
1544 	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1545 
1546 	crtime = dd->dd_creation_time;
1547 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1548 	(void) printf("\t\thead_dataset_obj = %llu\n",
1549 	    (u_longlong_t)dd->dd_head_dataset_obj);
1550 	(void) printf("\t\tparent_dir_obj = %llu\n",
1551 	    (u_longlong_t)dd->dd_parent_obj);
1552 	(void) printf("\t\torigin_obj = %llu\n",
1553 	    (u_longlong_t)dd->dd_origin_obj);
1554 	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1555 	    (u_longlong_t)dd->dd_child_dir_zapobj);
1556 	zdb_nicenum(dd->dd_used_bytes, nice, sizeof (nice));
1557 	(void) printf("\t\tused_bytes = %s\n", nice);
1558 	zdb_nicenum(dd->dd_compressed_bytes, nice, sizeof (nice));
1559 	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1560 	zdb_nicenum(dd->dd_uncompressed_bytes, nice, sizeof (nice));
1561 	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1562 	zdb_nicenum(dd->dd_quota, nice, sizeof (nice));
1563 	(void) printf("\t\tquota = %s\n", nice);
1564 	zdb_nicenum(dd->dd_reserved, nice, sizeof (nice));
1565 	(void) printf("\t\treserved = %s\n", nice);
1566 	(void) printf("\t\tprops_zapobj = %llu\n",
1567 	    (u_longlong_t)dd->dd_props_zapobj);
1568 	(void) printf("\t\tdeleg_zapobj = %llu\n",
1569 	    (u_longlong_t)dd->dd_deleg_zapobj);
1570 	(void) printf("\t\tflags = %llx\n",
1571 	    (u_longlong_t)dd->dd_flags);
1572 
1573 #define	DO(which) \
1574 	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice, \
1575 	    sizeof (nice)); \
1576 	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1577 	DO(HEAD);
1578 	DO(SNAP);
1579 	DO(CHILD);
1580 	DO(CHILD_RSRV);
1581 	DO(REFRSRV);
1582 #undef DO
1583 	(void) printf("\t\tclones = %llu\n",
1584 	    (u_longlong_t)dd->dd_clones);
1585 }
1586 
1587 /*ARGSUSED*/
1588 static void
1589 dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1590 {
1591 	dsl_dataset_phys_t *ds = data;
1592 	time_t crtime;
1593 	char used[32], compressed[32], uncompressed[32], unique[32];
1594 	char blkbuf[BP_SPRINTF_LEN];
1595 
1596 	/* make sure nicenum has enough space */
1597 	CTASSERT(sizeof (used) >= NN_NUMBUF_SZ);
1598 	CTASSERT(sizeof (compressed) >= NN_NUMBUF_SZ);
1599 	CTASSERT(sizeof (uncompressed) >= NN_NUMBUF_SZ);
1600 	CTASSERT(sizeof (unique) >= NN_NUMBUF_SZ);
1601 
1602 	if (ds == NULL)
1603 		return;
1604 
1605 	ASSERT(size == sizeof (*ds));
1606 	crtime = ds->ds_creation_time;
1607 	zdb_nicenum(ds->ds_referenced_bytes, used, sizeof (used));
1608 	zdb_nicenum(ds->ds_compressed_bytes, compressed, sizeof (compressed));
1609 	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed,
1610 	    sizeof (uncompressed));
1611 	zdb_nicenum(ds->ds_unique_bytes, unique, sizeof (unique));
1612 	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1613 
1614 	(void) printf("\t\tdir_obj = %llu\n",
1615 	    (u_longlong_t)ds->ds_dir_obj);
1616 	(void) printf("\t\tprev_snap_obj = %llu\n",
1617 	    (u_longlong_t)ds->ds_prev_snap_obj);
1618 	(void) printf("\t\tprev_snap_txg = %llu\n",
1619 	    (u_longlong_t)ds->ds_prev_snap_txg);
1620 	(void) printf("\t\tnext_snap_obj = %llu\n",
1621 	    (u_longlong_t)ds->ds_next_snap_obj);
1622 	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1623 	    (u_longlong_t)ds->ds_snapnames_zapobj);
1624 	(void) printf("\t\tnum_children = %llu\n",
1625 	    (u_longlong_t)ds->ds_num_children);
1626 	(void) printf("\t\tuserrefs_obj = %llu\n",
1627 	    (u_longlong_t)ds->ds_userrefs_obj);
1628 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1629 	(void) printf("\t\tcreation_txg = %llu\n",
1630 	    (u_longlong_t)ds->ds_creation_txg);
1631 	(void) printf("\t\tdeadlist_obj = %llu\n",
1632 	    (u_longlong_t)ds->ds_deadlist_obj);
1633 	(void) printf("\t\tused_bytes = %s\n", used);
1634 	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1635 	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1636 	(void) printf("\t\tunique = %s\n", unique);
1637 	(void) printf("\t\tfsid_guid = %llu\n",
1638 	    (u_longlong_t)ds->ds_fsid_guid);
1639 	(void) printf("\t\tguid = %llu\n",
1640 	    (u_longlong_t)ds->ds_guid);
1641 	(void) printf("\t\tflags = %llx\n",
1642 	    (u_longlong_t)ds->ds_flags);
1643 	(void) printf("\t\tnext_clones_obj = %llu\n",
1644 	    (u_longlong_t)ds->ds_next_clones_obj);
1645 	(void) printf("\t\tprops_obj = %llu\n",
1646 	    (u_longlong_t)ds->ds_props_obj);
1647 	(void) printf("\t\tbp = %s\n", blkbuf);
1648 }
1649 
1650 /* ARGSUSED */
1651 static int
1652 dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1653 {
1654 	char blkbuf[BP_SPRINTF_LEN];
1655 
1656 	if (bp->blk_birth != 0) {
1657 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1658 		(void) printf("\t%s\n", blkbuf);
1659 	}
1660 	return (0);
1661 }
1662 
1663 static void
1664 dump_bptree(objset_t *os, uint64_t obj, const char *name)
1665 {
1666 	char bytes[32];
1667 	bptree_phys_t *bt;
1668 	dmu_buf_t *db;
1669 
1670 	/* make sure nicenum has enough space */
1671 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1672 
1673 	if (dump_opt['d'] < 3)
1674 		return;
1675 
1676 	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1677 	bt = db->db_data;
1678 	zdb_nicenum(bt->bt_bytes, bytes, sizeof (bytes));
1679 	(void) printf("\n    %s: %llu datasets, %s\n",
1680 	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1681 	dmu_buf_rele(db, FTAG);
1682 
1683 	if (dump_opt['d'] < 5)
1684 		return;
1685 
1686 	(void) printf("\n");
1687 
1688 	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1689 }
1690 
1691 /* ARGSUSED */
1692 static int
1693 dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1694 {
1695 	char blkbuf[BP_SPRINTF_LEN];
1696 
1697 	ASSERT(bp->blk_birth != 0);
1698 	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1699 	(void) printf("\t%s\n", blkbuf);
1700 	return (0);
1701 }
1702 
1703 static void
1704 dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
1705 {
1706 	char bytes[32];
1707 	char comp[32];
1708 	char uncomp[32];
1709 
1710 	/* make sure nicenum has enough space */
1711 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1712 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1713 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1714 
1715 	if (dump_opt['d'] < 3)
1716 		return;
1717 
1718 	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes, sizeof (bytes));
1719 	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1720 		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp, sizeof (comp));
1721 		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp, sizeof (uncomp));
1722 		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1723 		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1724 		    indent * 8, name,
1725 		    (u_longlong_t)bpo->bpo_object,
1726 		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1727 		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1728 		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1729 		    bytes, comp, uncomp);
1730 
1731 		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1732 			uint64_t subobj;
1733 			bpobj_t subbpo;
1734 			int error;
1735 			VERIFY0(dmu_read(bpo->bpo_os,
1736 			    bpo->bpo_phys->bpo_subobjs,
1737 			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1738 			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1739 			if (error != 0) {
1740 				(void) printf("ERROR %u while trying to open "
1741 				    "subobj id %llu\n",
1742 				    error, (u_longlong_t)subobj);
1743 				continue;
1744 			}
1745 			dump_full_bpobj(&subbpo, "subobj", indent + 1);
1746 			bpobj_close(&subbpo);
1747 		}
1748 	} else {
1749 		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1750 		    indent * 8, name,
1751 		    (u_longlong_t)bpo->bpo_object,
1752 		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1753 		    bytes);
1754 	}
1755 
1756 	if (dump_opt['d'] < 5)
1757 		return;
1758 
1759 
1760 	if (indent == 0) {
1761 		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1762 		(void) printf("\n");
1763 	}
1764 }
1765 
1766 static void
1767 bpobj_count_refd(bpobj_t *bpo)
1768 {
1769 	mos_obj_refd(bpo->bpo_object);
1770 
1771 	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1772 		mos_obj_refd(bpo->bpo_phys->bpo_subobjs);
1773 		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1774 			uint64_t subobj;
1775 			bpobj_t subbpo;
1776 			int error;
1777 			VERIFY0(dmu_read(bpo->bpo_os,
1778 			    bpo->bpo_phys->bpo_subobjs,
1779 			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1780 			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1781 			if (error != 0) {
1782 				(void) printf("ERROR %u while trying to open "
1783 				    "subobj id %llu\n",
1784 				    error, (u_longlong_t)subobj);
1785 				continue;
1786 			}
1787 			bpobj_count_refd(&subbpo);
1788 			bpobj_close(&subbpo);
1789 		}
1790 	}
1791 }
1792 
1793 static void
1794 dump_deadlist(dsl_deadlist_t *dl)
1795 {
1796 	dsl_deadlist_entry_t *dle;
1797 	uint64_t unused;
1798 	char bytes[32];
1799 	char comp[32];
1800 	char uncomp[32];
1801 	uint64_t empty_bpobj =
1802 	    dmu_objset_spa(dl->dl_os)->spa_dsl_pool->dp_empty_bpobj;
1803 
1804 	/* force the tree to be loaded */
1805 	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1806 
1807 	if (dl->dl_oldfmt) {
1808 		if (dl->dl_bpobj.bpo_object != empty_bpobj)
1809 			bpobj_count_refd(&dl->dl_bpobj);
1810 	} else {
1811 		mos_obj_refd(dl->dl_object);
1812 		for (dle = avl_first(&dl->dl_tree); dle;
1813 		    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1814 			if (dle->dle_bpobj.bpo_object != empty_bpobj)
1815 				bpobj_count_refd(&dle->dle_bpobj);
1816 		}
1817 	}
1818 
1819 	/* make sure nicenum has enough space */
1820 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1821 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1822 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1823 
1824 	if (dump_opt['d'] < 3)
1825 		return;
1826 
1827 	if (dl->dl_oldfmt) {
1828 		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1829 		return;
1830 	}
1831 
1832 	zdb_nicenum(dl->dl_phys->dl_used, bytes, sizeof (bytes));
1833 	zdb_nicenum(dl->dl_phys->dl_comp, comp, sizeof (comp));
1834 	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp, sizeof (uncomp));
1835 	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1836 	    bytes, comp, uncomp);
1837 
1838 	if (dump_opt['d'] < 4)
1839 		return;
1840 
1841 	(void) printf("\n");
1842 
1843 	for (dle = avl_first(&dl->dl_tree); dle;
1844 	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1845 		if (dump_opt['d'] >= 5) {
1846 			char buf[128];
1847 			(void) snprintf(buf, sizeof (buf),
1848 			    "mintxg %llu -> obj %llu",
1849 			    (longlong_t)dle->dle_mintxg,
1850 			    (longlong_t)dle->dle_bpobj.bpo_object);
1851 
1852 			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1853 		} else {
1854 			(void) printf("mintxg %llu -> obj %llu\n",
1855 			    (longlong_t)dle->dle_mintxg,
1856 			    (longlong_t)dle->dle_bpobj.bpo_object);
1857 		}
1858 	}
1859 }
1860 
1861 static avl_tree_t idx_tree;
1862 static avl_tree_t domain_tree;
1863 static boolean_t fuid_table_loaded;
1864 static objset_t *sa_os = NULL;
1865 static sa_attr_type_t *sa_attr_table = NULL;
1866 
1867 static int
1868 open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
1869 {
1870 	int err;
1871 	uint64_t sa_attrs = 0;
1872 	uint64_t version = 0;
1873 
1874 	VERIFY3P(sa_os, ==, NULL);
1875 	err = dmu_objset_own(path, type, B_TRUE, B_FALSE, tag, osp);
1876 	if (err != 0) {
1877 		(void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
1878 		    strerror(err));
1879 		return (err);
1880 	}
1881 
1882 	if (dmu_objset_type(*osp) == DMU_OST_ZFS && !(*osp)->os_encrypted) {
1883 		(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1884 		    8, 1, &version);
1885 		if (version >= ZPL_VERSION_SA) {
1886 			(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1887 			    8, 1, &sa_attrs);
1888 		}
1889 		err = sa_setup(*osp, sa_attrs, zfs_attr_table, ZPL_END,
1890 		    &sa_attr_table);
1891 		if (err != 0) {
1892 			(void) fprintf(stderr, "sa_setup failed: %s\n",
1893 			    strerror(err));
1894 			dmu_objset_disown(*osp, B_FALSE, tag);
1895 			*osp = NULL;
1896 		}
1897 	}
1898 	sa_os = *osp;
1899 
1900 	return (0);
1901 }
1902 
1903 static void
1904 close_objset(objset_t *os, void *tag)
1905 {
1906 	VERIFY3P(os, ==, sa_os);
1907 	if (os->os_sa != NULL)
1908 		sa_tear_down(os);
1909 	dmu_objset_disown(os, B_FALSE, tag);
1910 	sa_attr_table = NULL;
1911 	sa_os = NULL;
1912 }
1913 
1914 static void
1915 fuid_table_destroy()
1916 {
1917 	if (fuid_table_loaded) {
1918 		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1919 		fuid_table_loaded = B_FALSE;
1920 	}
1921 }
1922 
1923 /*
1924  * print uid or gid information.
1925  * For normal POSIX id just the id is printed in decimal format.
1926  * For CIFS files with FUID the fuid is printed in hex followed by
1927  * the domain-rid string.
1928  */
1929 static void
1930 print_idstr(uint64_t id, const char *id_type)
1931 {
1932 	if (FUID_INDEX(id)) {
1933 		char *domain;
1934 
1935 		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1936 		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1937 		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1938 	} else {
1939 		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1940 	}
1941 
1942 }
1943 
1944 static void
1945 dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1946 {
1947 	uint32_t uid_idx, gid_idx;
1948 
1949 	uid_idx = FUID_INDEX(uid);
1950 	gid_idx = FUID_INDEX(gid);
1951 
1952 	/* Load domain table, if not already loaded */
1953 	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1954 		uint64_t fuid_obj;
1955 
1956 		/* first find the fuid object.  It lives in the master node */
1957 		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1958 		    8, 1, &fuid_obj) == 0);
1959 		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1960 		(void) zfs_fuid_table_load(os, fuid_obj,
1961 		    &idx_tree, &domain_tree);
1962 		fuid_table_loaded = B_TRUE;
1963 	}
1964 
1965 	print_idstr(uid, "uid");
1966 	print_idstr(gid, "gid");
1967 }
1968 
1969 /*ARGSUSED*/
1970 static void
1971 dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1972 {
1973 	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
1974 	sa_handle_t *hdl;
1975 	uint64_t xattr, rdev, gen;
1976 	uint64_t uid, gid, mode, fsize, parent, links;
1977 	uint64_t pflags;
1978 	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1979 	time_t z_crtime, z_atime, z_mtime, z_ctime;
1980 	sa_bulk_attr_t bulk[12];
1981 	int idx = 0;
1982 	int error;
1983 
1984 	VERIFY3P(os, ==, sa_os);
1985 	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1986 		(void) printf("Failed to get handle for SA znode\n");
1987 		return;
1988 	}
1989 
1990 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1991 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1992 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1993 	    &links, 8);
1994 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1995 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1996 	    &mode, 8);
1997 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1998 	    NULL, &parent, 8);
1999 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
2000 	    &fsize, 8);
2001 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
2002 	    acctm, 16);
2003 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
2004 	    modtm, 16);
2005 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
2006 	    crtm, 16);
2007 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
2008 	    chgtm, 16);
2009 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
2010 	    &pflags, 8);
2011 
2012 	if (sa_bulk_lookup(hdl, bulk, idx)) {
2013 		(void) sa_handle_destroy(hdl);
2014 		return;
2015 	}
2016 
2017 	z_crtime = (time_t)crtm[0];
2018 	z_atime = (time_t)acctm[0];
2019 	z_mtime = (time_t)modtm[0];
2020 	z_ctime = (time_t)chgtm[0];
2021 
2022 	if (dump_opt['d'] > 4) {
2023 		error = zfs_obj_to_path(os, object, path, sizeof (path));
2024 		if (error == ESTALE) {
2025 			(void) snprintf(path, sizeof (path), "on delete queue");
2026 		} else if (error != 0) {
2027 			leaked_objects++;
2028 			(void) snprintf(path, sizeof (path),
2029 			    "path not found, possibly leaked");
2030 		}
2031 		(void) printf("\tpath	%s\n", path);
2032 	}
2033 	dump_uidgid(os, uid, gid);
2034 	(void) printf("\tatime	%s", ctime(&z_atime));
2035 	(void) printf("\tmtime	%s", ctime(&z_mtime));
2036 	(void) printf("\tctime	%s", ctime(&z_ctime));
2037 	(void) printf("\tcrtime	%s", ctime(&z_crtime));
2038 	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
2039 	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
2040 	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
2041 	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
2042 	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
2043 	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
2044 	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
2045 	    sizeof (uint64_t)) == 0)
2046 		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
2047 	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
2048 	    sizeof (uint64_t)) == 0)
2049 		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
2050 	sa_handle_destroy(hdl);
2051 }
2052 
2053 /*ARGSUSED*/
2054 static void
2055 dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
2056 {
2057 }
2058 
2059 /*ARGSUSED*/
2060 static void
2061 dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
2062 {
2063 }
2064 
2065 
2066 static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
2067 	dump_none,		/* unallocated			*/
2068 	dump_zap,		/* object directory		*/
2069 	dump_uint64,		/* object array			*/
2070 	dump_none,		/* packed nvlist		*/
2071 	dump_packed_nvlist,	/* packed nvlist size		*/
2072 	dump_none,		/* bpobj			*/
2073 	dump_bpobj,		/* bpobj header			*/
2074 	dump_none,		/* SPA space map header		*/
2075 	dump_none,		/* SPA space map		*/
2076 	dump_none,		/* ZIL intent log		*/
2077 	dump_dnode,		/* DMU dnode			*/
2078 	dump_dmu_objset,	/* DMU objset			*/
2079 	dump_dsl_dir,		/* DSL directory		*/
2080 	dump_zap,		/* DSL directory child map	*/
2081 	dump_zap,		/* DSL dataset snap map		*/
2082 	dump_zap,		/* DSL props			*/
2083 	dump_dsl_dataset,	/* DSL dataset			*/
2084 	dump_znode,		/* ZFS znode			*/
2085 	dump_acl,		/* ZFS V0 ACL			*/
2086 	dump_uint8,		/* ZFS plain file		*/
2087 	dump_zpldir,		/* ZFS directory		*/
2088 	dump_zap,		/* ZFS master node		*/
2089 	dump_zap,		/* ZFS delete queue		*/
2090 	dump_uint8,		/* zvol object			*/
2091 	dump_zap,		/* zvol prop			*/
2092 	dump_uint8,		/* other uint8[]		*/
2093 	dump_uint64,		/* other uint64[]		*/
2094 	dump_zap,		/* other ZAP			*/
2095 	dump_zap,		/* persistent error log		*/
2096 	dump_uint8,		/* SPA history			*/
2097 	dump_history_offsets,	/* SPA history offsets		*/
2098 	dump_zap,		/* Pool properties		*/
2099 	dump_zap,		/* DSL permissions		*/
2100 	dump_acl,		/* ZFS ACL			*/
2101 	dump_uint8,		/* ZFS SYSACL			*/
2102 	dump_none,		/* FUID nvlist			*/
2103 	dump_packed_nvlist,	/* FUID nvlist size		*/
2104 	dump_zap,		/* DSL dataset next clones	*/
2105 	dump_zap,		/* DSL scrub queue		*/
2106 	dump_zap,		/* ZFS user/group used		*/
2107 	dump_zap,		/* ZFS user/group quota		*/
2108 	dump_zap,		/* snapshot refcount tags	*/
2109 	dump_ddt_zap,		/* DDT ZAP object		*/
2110 	dump_zap,		/* DDT statistics		*/
2111 	dump_znode,		/* SA object			*/
2112 	dump_zap,		/* SA Master Node		*/
2113 	dump_sa_attrs,		/* SA attribute registration	*/
2114 	dump_sa_layouts,	/* SA attribute layouts		*/
2115 	dump_zap,		/* DSL scrub translations	*/
2116 	dump_none,		/* fake dedup BP		*/
2117 	dump_zap,		/* deadlist			*/
2118 	dump_none,		/* deadlist hdr			*/
2119 	dump_zap,		/* dsl clones			*/
2120 	dump_bpobj_subobjs,	/* bpobj subobjs		*/
2121 	dump_unknown,		/* Unknown type, must be last	*/
2122 };
2123 
2124 static void
2125 dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header,
2126     uint64_t *dnode_slots_used)
2127 {
2128 	dmu_buf_t *db = NULL;
2129 	dmu_object_info_t doi;
2130 	dnode_t *dn;
2131 	boolean_t dnode_held = B_FALSE;
2132 	void *bonus = NULL;
2133 	size_t bsize = 0;
2134 	char iblk[32], dblk[32], lsize[32], asize[32], fill[32], dnsize[32];
2135 	char bonus_size[32];
2136 	char aux[50];
2137 	int error;
2138 
2139 	/* make sure nicenum has enough space */
2140 	CTASSERT(sizeof (iblk) >= NN_NUMBUF_SZ);
2141 	CTASSERT(sizeof (dblk) >= NN_NUMBUF_SZ);
2142 	CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
2143 	CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
2144 	CTASSERT(sizeof (bonus_size) >= NN_NUMBUF_SZ);
2145 
2146 	if (*print_header) {
2147 		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %6s  %5s  %6s  %s\n",
2148 		    "Object", "lvl", "iblk", "dblk", "dsize", "dnsize",
2149 		    "lsize", "%full", "type");
2150 		*print_header = 0;
2151 	}
2152 
2153 	if (object == 0) {
2154 		dn = DMU_META_DNODE(os);
2155 		dmu_object_info_from_dnode(dn, &doi);
2156 	} else {
2157 		/*
2158 		 * Encrypted datasets will have sensitive bonus buffers
2159 		 * encrypted. Therefore we cannot hold the bonus buffer and
2160 		 * must hold the dnode itself instead.
2161 		 */
2162 		error = dmu_object_info(os, object, &doi);
2163 		if (error)
2164 			fatal("dmu_object_info() failed, errno %u", error);
2165 
2166 		if (os->os_encrypted &&
2167 		    DMU_OT_IS_ENCRYPTED(doi.doi_bonus_type)) {
2168 			error = dnode_hold(os, object, FTAG, &dn);
2169 			if (error)
2170 				fatal("dnode_hold() failed, errno %u", error);
2171 			dnode_held = B_TRUE;
2172 		} else {
2173 			error = dmu_bonus_hold(os, object, FTAG, &db);
2174 			if (error)
2175 				fatal("dmu_bonus_hold(%llu) failed, errno %u",
2176 				    object, error);
2177 			bonus = db->db_data;
2178 			bsize = db->db_size;
2179 			dn = DB_DNODE((dmu_buf_impl_t *)db);
2180 		}
2181 	}
2182 
2183 	if (dnode_slots_used != NULL)
2184 		*dnode_slots_used = doi.doi_dnodesize / DNODE_MIN_SIZE;
2185 
2186 	zdb_nicenum(doi.doi_metadata_block_size, iblk, sizeof (iblk));
2187 	zdb_nicenum(doi.doi_data_block_size, dblk, sizeof (dblk));
2188 	zdb_nicenum(doi.doi_max_offset, lsize, sizeof (lsize));
2189 	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize, sizeof (asize));
2190 	zdb_nicenum(doi.doi_bonus_size, bonus_size, sizeof (bonus_size));
2191 	zdb_nicenum(doi.doi_dnodesize, dnsize, sizeof (dnsize));
2192 	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
2193 	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
2194 	    doi.doi_max_offset);
2195 
2196 	aux[0] = '\0';
2197 
2198 	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
2199 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
2200 		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
2201 	}
2202 
2203 	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
2204 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
2205 		    ZDB_COMPRESS_NAME(doi.doi_compress));
2206 	}
2207 
2208 	(void) printf("%10" PRIu64
2209 	    "  %3u  %5s  %5s  %5s  %5s  %5s  %6s  %s%s\n",
2210 	    object, doi.doi_indirection, iblk, dblk,
2211 	    asize, dnsize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
2212 
2213 	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
2214 		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %5s  %6s  %s\n",
2215 		    "", "", "", "", "", "", bonus_size, "bonus",
2216 		    ZDB_OT_NAME(doi.doi_bonus_type));
2217 	}
2218 
2219 	if (verbosity >= 4) {
2220 		(void) printf("\tdnode flags: %s%s%s\n",
2221 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
2222 		    "USED_BYTES " : "",
2223 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
2224 		    "USERUSED_ACCOUNTED " : "",
2225 		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
2226 		    "SPILL_BLKPTR" : "");
2227 		(void) printf("\tdnode maxblkid: %llu\n",
2228 		    (longlong_t)dn->dn_phys->dn_maxblkid);
2229 
2230 		if (!dnode_held) {
2231 			object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os,
2232 			    object, bonus, bsize);
2233 		} else {
2234 			(void) printf("\t\t(bonus encrypted)\n");
2235 		}
2236 
2237 		if (!os->os_encrypted || !DMU_OT_IS_ENCRYPTED(doi.doi_type)) {
2238 			object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object,
2239 			    NULL, 0);
2240 		} else {
2241 			(void) printf("\t\t(object encrypted)\n");
2242 		}
2243 
2244 		*print_header = 1;
2245 	}
2246 
2247 	if (verbosity >= 5)
2248 		dump_indirect(dn);
2249 
2250 	if (verbosity >= 5) {
2251 		/*
2252 		 * Report the list of segments that comprise the object.
2253 		 */
2254 		uint64_t start = 0;
2255 		uint64_t end;
2256 		uint64_t blkfill = 1;
2257 		int minlvl = 1;
2258 
2259 		if (dn->dn_type == DMU_OT_DNODE) {
2260 			minlvl = 0;
2261 			blkfill = DNODES_PER_BLOCK;
2262 		}
2263 
2264 		for (;;) {
2265 			char segsize[32];
2266 			/* make sure nicenum has enough space */
2267 			CTASSERT(sizeof (segsize) >= NN_NUMBUF_SZ);
2268 			error = dnode_next_offset(dn,
2269 			    0, &start, minlvl, blkfill, 0);
2270 			if (error)
2271 				break;
2272 			end = start;
2273 			error = dnode_next_offset(dn,
2274 			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
2275 			zdb_nicenum(end - start, segsize, sizeof (segsize));
2276 			(void) printf("\t\tsegment [%016llx, %016llx)"
2277 			    " size %5s\n", (u_longlong_t)start,
2278 			    (u_longlong_t)end, segsize);
2279 			if (error)
2280 				break;
2281 			start = end;
2282 		}
2283 	}
2284 
2285 	if (db != NULL)
2286 		dmu_buf_rele(db, FTAG);
2287 	if (dnode_held)
2288 		dnode_rele(dn, FTAG);
2289 }
2290 
2291 static void
2292 count_dir_mos_objects(dsl_dir_t *dd)
2293 {
2294 	mos_obj_refd(dd->dd_object);
2295 	mos_obj_refd(dsl_dir_phys(dd)->dd_child_dir_zapobj);
2296 	mos_obj_refd(dsl_dir_phys(dd)->dd_deleg_zapobj);
2297 	mos_obj_refd(dsl_dir_phys(dd)->dd_props_zapobj);
2298 	mos_obj_refd(dsl_dir_phys(dd)->dd_clones);
2299 }
2300 
2301 static void
2302 count_ds_mos_objects(dsl_dataset_t *ds)
2303 {
2304 	mos_obj_refd(ds->ds_object);
2305 	mos_obj_refd(dsl_dataset_phys(ds)->ds_next_clones_obj);
2306 	mos_obj_refd(dsl_dataset_phys(ds)->ds_props_obj);
2307 	mos_obj_refd(dsl_dataset_phys(ds)->ds_userrefs_obj);
2308 	mos_obj_refd(dsl_dataset_phys(ds)->ds_snapnames_zapobj);
2309 
2310 	if (!dsl_dataset_is_snapshot(ds)) {
2311 		count_dir_mos_objects(ds->ds_dir);
2312 	}
2313 }
2314 
2315 static const char *objset_types[DMU_OST_NUMTYPES] = {
2316 	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
2317 
2318 static void
2319 dump_dir(objset_t *os)
2320 {
2321 	dmu_objset_stats_t dds;
2322 	uint64_t object, object_count;
2323 	uint64_t refdbytes, usedobjs, scratch;
2324 	char numbuf[32];
2325 	char blkbuf[BP_SPRINTF_LEN + 20];
2326 	char osname[ZFS_MAX_DATASET_NAME_LEN];
2327 	const char *type = "UNKNOWN";
2328 	int verbosity = dump_opt['d'];
2329 	int print_header = 1;
2330 	unsigned i;
2331 	int error;
2332 	uint64_t total_slots_used = 0;
2333 	uint64_t max_slot_used = 0;
2334 	uint64_t dnode_slots;
2335 
2336 	/* make sure nicenum has enough space */
2337 	CTASSERT(sizeof (numbuf) >= NN_NUMBUF_SZ);
2338 
2339 	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
2340 	dmu_objset_fast_stat(os, &dds);
2341 	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
2342 
2343 	if (dds.dds_type < DMU_OST_NUMTYPES)
2344 		type = objset_types[dds.dds_type];
2345 
2346 	if (dds.dds_type == DMU_OST_META) {
2347 		dds.dds_creation_txg = TXG_INITIAL;
2348 		usedobjs = BP_GET_FILL(os->os_rootbp);
2349 		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
2350 		    dd_used_bytes;
2351 	} else {
2352 		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
2353 	}
2354 
2355 	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
2356 
2357 	zdb_nicenum(refdbytes, numbuf, sizeof (numbuf));
2358 
2359 	if (verbosity >= 4) {
2360 		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
2361 		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
2362 		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
2363 	} else {
2364 		blkbuf[0] = '\0';
2365 	}
2366 
2367 	dmu_objset_name(os, osname);
2368 
2369 	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
2370 	    "%s, %llu objects%s%s\n",
2371 	    osname, type, (u_longlong_t)dmu_objset_id(os),
2372 	    (u_longlong_t)dds.dds_creation_txg,
2373 	    numbuf, (u_longlong_t)usedobjs, blkbuf,
2374 	    (dds.dds_inconsistent) ? " (inconsistent)" : "");
2375 
2376 	if (zopt_objects != 0) {
2377 		for (i = 0; i < zopt_objects; i++)
2378 			dump_object(os, zopt_object[i], verbosity,
2379 			    &print_header, NULL);
2380 		(void) printf("\n");
2381 		return;
2382 	}
2383 
2384 	if (dump_opt['i'] != 0 || verbosity >= 2)
2385 		dump_intent_log(dmu_objset_zil(os));
2386 
2387 	if (dmu_objset_ds(os) != NULL) {
2388 		dsl_dataset_t *ds = dmu_objset_ds(os);
2389 		dump_deadlist(&ds->ds_deadlist);
2390 
2391 		if (dsl_dataset_remap_deadlist_exists(ds)) {
2392 			(void) printf("ds_remap_deadlist:\n");
2393 			dump_deadlist(&ds->ds_remap_deadlist);
2394 		}
2395 		count_ds_mos_objects(ds);
2396 	}
2397 
2398 	if (verbosity < 2)
2399 		return;
2400 
2401 	if (BP_IS_HOLE(os->os_rootbp))
2402 		return;
2403 
2404 	dump_object(os, 0, verbosity, &print_header, NULL);
2405 	object_count = 0;
2406 	if (DMU_USERUSED_DNODE(os) != NULL &&
2407 	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
2408 		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header,
2409 		    NULL);
2410 		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header,
2411 		    NULL);
2412 	}
2413 
2414 	object = 0;
2415 	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2416 		dump_object(os, object, verbosity, &print_header, &dnode_slots);
2417 		object_count++;
2418 		total_slots_used += dnode_slots;
2419 		max_slot_used = object + dnode_slots - 1;
2420 	}
2421 
2422 	(void) printf("\n");
2423 
2424 	(void) printf("    Dnode slots:\n");
2425 	(void) printf("\tTotal used:    %10llu\n",
2426 	    (u_longlong_t)total_slots_used);
2427 	(void) printf("\tMax used:      %10llu\n",
2428 	    (u_longlong_t)max_slot_used);
2429 	(void) printf("\tPercent empty: %10lf\n",
2430 	    (double)(max_slot_used - total_slots_used)*100 /
2431 	    (double)max_slot_used);
2432 
2433 	(void) printf("\n");
2434 
2435 	if (error != ESRCH) {
2436 		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2437 		abort();
2438 	}
2439 	if (leaked_objects != 0) {
2440 		(void) printf("%d potentially leaked objects detected\n",
2441 		    leaked_objects);
2442 		leaked_objects = 0;
2443 	}
2444 
2445 	ASSERT3U(object_count, ==, usedobjs);
2446 }
2447 
2448 static void
2449 dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2450 {
2451 	time_t timestamp = ub->ub_timestamp;
2452 
2453 	(void) printf("%s", header ? header : "");
2454 	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2455 	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2456 	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2457 	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2458 	(void) printf("\ttimestamp = %llu UTC = %s",
2459 	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2460 
2461 	(void) printf("\tmmp_magic = %016llx\n",
2462 	    (u_longlong_t)ub->ub_mmp_magic);
2463 	if (ub->ub_mmp_magic == MMP_MAGIC)
2464 		(void) printf("\tmmp_delay = %0llu\n",
2465 		    (u_longlong_t)ub->ub_mmp_delay);
2466 
2467 	if (dump_opt['u'] >= 3) {
2468 		char blkbuf[BP_SPRINTF_LEN];
2469 		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2470 		(void) printf("\trootbp = %s\n", blkbuf);
2471 	}
2472 	(void) printf("\tcheckpoint_txg = %llu\n",
2473 	    (u_longlong_t)ub->ub_checkpoint_txg);
2474 	(void) printf("%s", footer ? footer : "");
2475 }
2476 
2477 static void
2478 dump_config(spa_t *spa)
2479 {
2480 	dmu_buf_t *db;
2481 	size_t nvsize = 0;
2482 	int error = 0;
2483 
2484 
2485 	error = dmu_bonus_hold(spa->spa_meta_objset,
2486 	    spa->spa_config_object, FTAG, &db);
2487 
2488 	if (error == 0) {
2489 		nvsize = *(uint64_t *)db->db_data;
2490 		dmu_buf_rele(db, FTAG);
2491 
2492 		(void) printf("\nMOS Configuration:\n");
2493 		dump_packed_nvlist(spa->spa_meta_objset,
2494 		    spa->spa_config_object, (void *)&nvsize, 1);
2495 	} else {
2496 		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2497 		    (u_longlong_t)spa->spa_config_object, error);
2498 	}
2499 }
2500 
2501 static void
2502 dump_cachefile(const char *cachefile)
2503 {
2504 	int fd;
2505 	struct stat64 statbuf;
2506 	char *buf;
2507 	nvlist_t *config;
2508 
2509 	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2510 		(void) printf("cannot open '%s': %s\n", cachefile,
2511 		    strerror(errno));
2512 		exit(1);
2513 	}
2514 
2515 	if (fstat64(fd, &statbuf) != 0) {
2516 		(void) printf("failed to stat '%s': %s\n", cachefile,
2517 		    strerror(errno));
2518 		exit(1);
2519 	}
2520 
2521 	if ((buf = malloc(statbuf.st_size)) == NULL) {
2522 		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
2523 		    (u_longlong_t)statbuf.st_size);
2524 		exit(1);
2525 	}
2526 
2527 	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2528 		(void) fprintf(stderr, "failed to read %llu bytes\n",
2529 		    (u_longlong_t)statbuf.st_size);
2530 		exit(1);
2531 	}
2532 
2533 	(void) close(fd);
2534 
2535 	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2536 		(void) fprintf(stderr, "failed to unpack nvlist\n");
2537 		exit(1);
2538 	}
2539 
2540 	free(buf);
2541 
2542 	dump_nvlist(config, 0);
2543 
2544 	nvlist_free(config);
2545 }
2546 
2547 #define	ZDB_MAX_UB_HEADER_SIZE 32
2548 
2549 static void
2550 dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2551 {
2552 	vdev_t vd;
2553 	vdev_t *vdp = &vd;
2554 	char header[ZDB_MAX_UB_HEADER_SIZE];
2555 
2556 	vd.vdev_ashift = ashift;
2557 	vdp->vdev_top = vdp;
2558 
2559 	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2560 		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2561 		uberblock_t *ub = (void *)((char *)lbl + uoff);
2562 
2563 		if (uberblock_verify(ub))
2564 			continue;
2565 
2566 		if ((dump_opt['u'] < 4) &&
2567 		    (ub->ub_mmp_magic == MMP_MAGIC) && ub->ub_mmp_delay &&
2568 		    (i >= VDEV_UBERBLOCK_COUNT(&vd) - MMP_BLOCKS_PER_LABEL))
2569 			continue;
2570 
2571 		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2572 		    "Uberblock[%d]\n", i);
2573 		dump_uberblock(ub, header, "");
2574 	}
2575 }
2576 
2577 static char curpath[PATH_MAX];
2578 
2579 /*
2580  * Iterate through the path components, recursively passing
2581  * current one's obj and remaining path until we find the obj
2582  * for the last one.
2583  */
2584 static int
2585 dump_path_impl(objset_t *os, uint64_t obj, char *name)
2586 {
2587 	int err;
2588 	int header = 1;
2589 	uint64_t child_obj;
2590 	char *s;
2591 	dmu_buf_t *db;
2592 	dmu_object_info_t doi;
2593 
2594 	if ((s = strchr(name, '/')) != NULL)
2595 		*s = '\0';
2596 	err = zap_lookup(os, obj, name, 8, 1, &child_obj);
2597 
2598 	(void) strlcat(curpath, name, sizeof (curpath));
2599 
2600 	if (err != 0) {
2601 		(void) fprintf(stderr, "failed to lookup %s: %s\n",
2602 		    curpath, strerror(err));
2603 		return (err);
2604 	}
2605 
2606 	child_obj = ZFS_DIRENT_OBJ(child_obj);
2607 	err = sa_buf_hold(os, child_obj, FTAG, &db);
2608 	if (err != 0) {
2609 		(void) fprintf(stderr,
2610 		    "failed to get SA dbuf for obj %llu: %s\n",
2611 		    (u_longlong_t)child_obj, strerror(err));
2612 		return (EINVAL);
2613 	}
2614 	dmu_object_info_from_db(db, &doi);
2615 	sa_buf_rele(db, FTAG);
2616 
2617 	if (doi.doi_bonus_type != DMU_OT_SA &&
2618 	    doi.doi_bonus_type != DMU_OT_ZNODE) {
2619 		(void) fprintf(stderr, "invalid bonus type %d for obj %llu\n",
2620 		    doi.doi_bonus_type, (u_longlong_t)child_obj);
2621 		return (EINVAL);
2622 	}
2623 
2624 	if (dump_opt['v'] > 6) {
2625 		(void) printf("obj=%llu %s type=%d bonustype=%d\n",
2626 		    (u_longlong_t)child_obj, curpath, doi.doi_type,
2627 		    doi.doi_bonus_type);
2628 	}
2629 
2630 	(void) strlcat(curpath, "/", sizeof (curpath));
2631 
2632 	switch (doi.doi_type) {
2633 	case DMU_OT_DIRECTORY_CONTENTS:
2634 		if (s != NULL && *(s + 1) != '\0')
2635 			return (dump_path_impl(os, child_obj, s + 1));
2636 		/*FALLTHROUGH*/
2637 	case DMU_OT_PLAIN_FILE_CONTENTS:
2638 		dump_object(os, child_obj, dump_opt['v'], &header, NULL);
2639 		return (0);
2640 	default:
2641 		(void) fprintf(stderr, "object %llu has non-file/directory "
2642 		    "type %d\n", (u_longlong_t)obj, doi.doi_type);
2643 		break;
2644 	}
2645 
2646 	return (EINVAL);
2647 }
2648 
2649 /*
2650  * Dump the blocks for the object specified by path inside the dataset.
2651  */
2652 static int
2653 dump_path(char *ds, char *path)
2654 {
2655 	int err;
2656 	objset_t *os;
2657 	uint64_t root_obj;
2658 
2659 	err = open_objset(ds, DMU_OST_ZFS, FTAG, &os);
2660 	if (err != 0)
2661 		return (err);
2662 
2663 	err = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &root_obj);
2664 	if (err != 0) {
2665 		(void) fprintf(stderr, "can't lookup root znode: %s\n",
2666 		    strerror(err));
2667 		dmu_objset_disown(os, B_FALSE, FTAG);
2668 		return (EINVAL);
2669 	}
2670 
2671 	(void) snprintf(curpath, sizeof (curpath), "dataset=%s path=/", ds);
2672 
2673 	err = dump_path_impl(os, root_obj, path);
2674 
2675 	close_objset(os, FTAG);
2676 	return (err);
2677 }
2678 
2679 static int
2680 dump_label(const char *dev)
2681 {
2682 	int fd;
2683 	vdev_label_t label;
2684 	char path[MAXPATHLEN];
2685 	char *buf = label.vl_vdev_phys.vp_nvlist;
2686 	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2687 	struct stat64 statbuf;
2688 	uint64_t psize, ashift;
2689 	boolean_t label_found = B_FALSE;
2690 
2691 	(void) strlcpy(path, dev, sizeof (path));
2692 	if (dev[0] == '/') {
2693 		if (strncmp(dev, ZFS_DISK_ROOTD,
2694 		    strlen(ZFS_DISK_ROOTD)) == 0) {
2695 			(void) snprintf(path, sizeof (path), "%s%s",
2696 			    ZFS_RDISK_ROOTD, dev + strlen(ZFS_DISK_ROOTD));
2697 		}
2698 	} else if (stat64(path, &statbuf) != 0) {
2699 		char *s;
2700 
2701 		(void) snprintf(path, sizeof (path), "%s%s", ZFS_RDISK_ROOTD,
2702 		    dev);
2703 		if (((s = strrchr(dev, 's')) == NULL &&
2704 		    (s = strchr(dev, 'p')) == NULL) ||
2705 		    !isdigit(*(s + 1)))
2706 			(void) strlcat(path, "s0", sizeof (path));
2707 	}
2708 
2709 	if ((fd = open64(path, O_RDONLY)) < 0) {
2710 		(void) fprintf(stderr, "cannot open '%s': %s\n", path,
2711 		    strerror(errno));
2712 		exit(1);
2713 	}
2714 
2715 	if (fstat64(fd, &statbuf) != 0) {
2716 		(void) fprintf(stderr, "failed to stat '%s': %s\n", path,
2717 		    strerror(errno));
2718 		(void) close(fd);
2719 		exit(1);
2720 	}
2721 
2722 	if (S_ISBLK(statbuf.st_mode)) {
2723 		(void) fprintf(stderr,
2724 		    "cannot use '%s': character device required\n", path);
2725 		(void) close(fd);
2726 		exit(1);
2727 	}
2728 
2729 	psize = statbuf.st_size;
2730 	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2731 
2732 	for (int l = 0; l < VDEV_LABELS; l++) {
2733 		nvlist_t *config = NULL;
2734 
2735 		if (!dump_opt['q']) {
2736 			(void) printf("------------------------------------\n");
2737 			(void) printf("LABEL %d\n", l);
2738 			(void) printf("------------------------------------\n");
2739 		}
2740 
2741 		if (pread64(fd, &label, sizeof (label),
2742 		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2743 			if (!dump_opt['q'])
2744 				(void) printf("failed to read label %d\n", l);
2745 			continue;
2746 		}
2747 
2748 		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2749 			if (!dump_opt['q'])
2750 				(void) printf("failed to unpack label %d\n", l);
2751 			ashift = SPA_MINBLOCKSHIFT;
2752 		} else {
2753 			nvlist_t *vdev_tree = NULL;
2754 
2755 			if (!dump_opt['q'])
2756 				dump_nvlist(config, 4);
2757 			if ((nvlist_lookup_nvlist(config,
2758 			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2759 			    (nvlist_lookup_uint64(vdev_tree,
2760 			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2761 				ashift = SPA_MINBLOCKSHIFT;
2762 			nvlist_free(config);
2763 			label_found = B_TRUE;
2764 		}
2765 		if (dump_opt['u'])
2766 			dump_label_uberblocks(&label, ashift);
2767 	}
2768 
2769 	(void) close(fd);
2770 
2771 	return (label_found ? 0 : 2);
2772 }
2773 
2774 static uint64_t dataset_feature_count[SPA_FEATURES];
2775 static uint64_t remap_deadlist_count = 0;
2776 
2777 /*ARGSUSED*/
2778 static int
2779 dump_one_dir(const char *dsname, void *arg)
2780 {
2781 	int error;
2782 	objset_t *os;
2783 
2784 	error = open_objset(dsname, DMU_OST_ANY, FTAG, &os);
2785 	if (error != 0)
2786 		return (0);
2787 
2788 	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
2789 		if (!dmu_objset_ds(os)->ds_feature_inuse[f])
2790 			continue;
2791 		ASSERT(spa_feature_table[f].fi_flags &
2792 		    ZFEATURE_FLAG_PER_DATASET);
2793 		dataset_feature_count[f]++;
2794 	}
2795 
2796 	if (dsl_dataset_remap_deadlist_exists(dmu_objset_ds(os))) {
2797 		remap_deadlist_count++;
2798 	}
2799 
2800 	dump_dir(os);
2801 	close_objset(os, FTAG);
2802 	fuid_table_destroy();
2803 	return (0);
2804 }
2805 
2806 /*
2807  * Block statistics.
2808  */
2809 #define	PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2810 typedef struct zdb_blkstats {
2811 	uint64_t zb_asize;
2812 	uint64_t zb_lsize;
2813 	uint64_t zb_psize;
2814 	uint64_t zb_count;
2815 	uint64_t zb_gangs;
2816 	uint64_t zb_ditto_samevdev;
2817 	uint64_t zb_ditto_same_ms;
2818 	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2819 } zdb_blkstats_t;
2820 
2821 /*
2822  * Extended object types to report deferred frees and dedup auto-ditto blocks.
2823  */
2824 #define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
2825 #define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
2826 #define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
2827 #define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
2828 
2829 static const char *zdb_ot_extname[] = {
2830 	"deferred free",
2831 	"dedup ditto",
2832 	"other",
2833 	"Total",
2834 };
2835 
2836 #define	ZB_TOTAL	DN_MAX_LEVELS
2837 
2838 typedef struct zdb_cb {
2839 	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2840 	uint64_t	zcb_removing_size;
2841 	uint64_t	zcb_checkpoint_size;
2842 	uint64_t	zcb_dedup_asize;
2843 	uint64_t	zcb_dedup_blocks;
2844 	uint64_t	zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2845 	uint64_t	zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2846 	    [BPE_PAYLOAD_SIZE];
2847 	uint64_t	zcb_start;
2848 	hrtime_t	zcb_lastprint;
2849 	uint64_t	zcb_totalasize;
2850 	uint64_t	zcb_errors[256];
2851 	int		zcb_readfails;
2852 	int		zcb_haderrors;
2853 	spa_t		*zcb_spa;
2854 	uint32_t	**zcb_vd_obsolete_counts;
2855 } zdb_cb_t;
2856 
2857 /* test if two DVA offsets from same vdev are within the same metaslab */
2858 static boolean_t
2859 same_metaslab(spa_t *spa, uint64_t vdev, uint64_t off1, uint64_t off2)
2860 {
2861 	vdev_t *vd = vdev_lookup_top(spa, vdev);
2862 	uint64_t ms_shift = vd->vdev_ms_shift;
2863 
2864 	return ((off1 >> ms_shift) == (off2 >> ms_shift));
2865 }
2866 
2867 static void
2868 zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2869     dmu_object_type_t type)
2870 {
2871 	uint64_t refcnt = 0;
2872 
2873 	ASSERT(type < ZDB_OT_TOTAL);
2874 
2875 	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2876 		return;
2877 
2878 	spa_config_enter(zcb->zcb_spa, SCL_CONFIG, FTAG, RW_READER);
2879 
2880 	for (int i = 0; i < 4; i++) {
2881 		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2882 		int t = (i & 1) ? type : ZDB_OT_TOTAL;
2883 		int equal;
2884 		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2885 
2886 		zb->zb_asize += BP_GET_ASIZE(bp);
2887 		zb->zb_lsize += BP_GET_LSIZE(bp);
2888 		zb->zb_psize += BP_GET_PSIZE(bp);
2889 		zb->zb_count++;
2890 
2891 		/*
2892 		 * The histogram is only big enough to record blocks up to
2893 		 * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2894 		 * "other", bucket.
2895 		 */
2896 		unsigned idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2897 		idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2898 		zb->zb_psize_histogram[idx]++;
2899 
2900 		zb->zb_gangs += BP_COUNT_GANG(bp);
2901 
2902 		switch (BP_GET_NDVAS(bp)) {
2903 		case 2:
2904 			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2905 			    DVA_GET_VDEV(&bp->blk_dva[1])) {
2906 				zb->zb_ditto_samevdev++;
2907 
2908 				if (same_metaslab(zcb->zcb_spa,
2909 				    DVA_GET_VDEV(&bp->blk_dva[0]),
2910 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2911 				    DVA_GET_OFFSET(&bp->blk_dva[1])))
2912 					zb->zb_ditto_same_ms++;
2913 			}
2914 			break;
2915 		case 3:
2916 			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2917 			    DVA_GET_VDEV(&bp->blk_dva[1])) +
2918 			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2919 			    DVA_GET_VDEV(&bp->blk_dva[2])) +
2920 			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2921 			    DVA_GET_VDEV(&bp->blk_dva[2]));
2922 			if (equal != 0) {
2923 				zb->zb_ditto_samevdev++;
2924 
2925 				if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2926 				    DVA_GET_VDEV(&bp->blk_dva[1]) &&
2927 				    same_metaslab(zcb->zcb_spa,
2928 				    DVA_GET_VDEV(&bp->blk_dva[0]),
2929 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2930 				    DVA_GET_OFFSET(&bp->blk_dva[1])))
2931 					zb->zb_ditto_same_ms++;
2932 				else if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2933 				    DVA_GET_VDEV(&bp->blk_dva[2]) &&
2934 				    same_metaslab(zcb->zcb_spa,
2935 				    DVA_GET_VDEV(&bp->blk_dva[0]),
2936 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2937 				    DVA_GET_OFFSET(&bp->blk_dva[2])))
2938 					zb->zb_ditto_same_ms++;
2939 				else if (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2940 				    DVA_GET_VDEV(&bp->blk_dva[2]) &&
2941 				    same_metaslab(zcb->zcb_spa,
2942 				    DVA_GET_VDEV(&bp->blk_dva[1]),
2943 				    DVA_GET_OFFSET(&bp->blk_dva[1]),
2944 				    DVA_GET_OFFSET(&bp->blk_dva[2])))
2945 					zb->zb_ditto_same_ms++;
2946 			}
2947 			break;
2948 		}
2949 	}
2950 
2951 	spa_config_exit(zcb->zcb_spa, SCL_CONFIG, FTAG);
2952 
2953 	if (BP_IS_EMBEDDED(bp)) {
2954 		zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2955 		zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2956 		    [BPE_GET_PSIZE(bp)]++;
2957 		return;
2958 	}
2959 
2960 	if (dump_opt['L'])
2961 		return;
2962 
2963 	if (BP_GET_DEDUP(bp)) {
2964 		ddt_t *ddt;
2965 		ddt_entry_t *dde;
2966 
2967 		ddt = ddt_select(zcb->zcb_spa, bp);
2968 		ddt_enter(ddt);
2969 		dde = ddt_lookup(ddt, bp, B_FALSE);
2970 
2971 		if (dde == NULL) {
2972 			refcnt = 0;
2973 		} else {
2974 			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2975 			ddt_phys_decref(ddp);
2976 			refcnt = ddp->ddp_refcnt;
2977 			if (ddt_phys_total_refcnt(dde) == 0)
2978 				ddt_remove(ddt, dde);
2979 		}
2980 		ddt_exit(ddt);
2981 	}
2982 
2983 	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2984 	    refcnt ? 0 : spa_min_claim_txg(zcb->zcb_spa),
2985 	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2986 }
2987 
2988 static void
2989 zdb_blkptr_done(zio_t *zio)
2990 {
2991 	spa_t *spa = zio->io_spa;
2992 	blkptr_t *bp = zio->io_bp;
2993 	int ioerr = zio->io_error;
2994 	zdb_cb_t *zcb = zio->io_private;
2995 	zbookmark_phys_t *zb = &zio->io_bookmark;
2996 
2997 	abd_free(zio->io_abd);
2998 
2999 	mutex_enter(&spa->spa_scrub_lock);
3000 	spa->spa_load_verify_ios--;
3001 	cv_broadcast(&spa->spa_scrub_io_cv);
3002 
3003 	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
3004 		char blkbuf[BP_SPRINTF_LEN];
3005 
3006 		zcb->zcb_haderrors = 1;
3007 		zcb->zcb_errors[ioerr]++;
3008 
3009 		if (dump_opt['b'] >= 2)
3010 			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3011 		else
3012 			blkbuf[0] = '\0';
3013 
3014 		(void) printf("zdb_blkptr_cb: "
3015 		    "Got error %d reading "
3016 		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
3017 		    ioerr,
3018 		    (u_longlong_t)zb->zb_objset,
3019 		    (u_longlong_t)zb->zb_object,
3020 		    (u_longlong_t)zb->zb_level,
3021 		    (u_longlong_t)zb->zb_blkid,
3022 		    blkbuf);
3023 	}
3024 	mutex_exit(&spa->spa_scrub_lock);
3025 }
3026 
3027 static int
3028 zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
3029     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
3030 {
3031 	zdb_cb_t *zcb = arg;
3032 	dmu_object_type_t type;
3033 	boolean_t is_metadata;
3034 
3035 	if (bp == NULL)
3036 		return (0);
3037 
3038 	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
3039 		char blkbuf[BP_SPRINTF_LEN];
3040 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3041 		(void) printf("objset %llu object %llu "
3042 		    "level %lld offset 0x%llx %s\n",
3043 		    (u_longlong_t)zb->zb_objset,
3044 		    (u_longlong_t)zb->zb_object,
3045 		    (longlong_t)zb->zb_level,
3046 		    (u_longlong_t)blkid2offset(dnp, bp, zb),
3047 		    blkbuf);
3048 	}
3049 
3050 	if (BP_IS_HOLE(bp))
3051 		return (0);
3052 
3053 	type = BP_GET_TYPE(bp);
3054 
3055 	zdb_count_block(zcb, zilog, bp,
3056 	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
3057 
3058 	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
3059 
3060 	if (!BP_IS_EMBEDDED(bp) &&
3061 	    (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
3062 		size_t size = BP_GET_PSIZE(bp);
3063 		abd_t *abd = abd_alloc(size, B_FALSE);
3064 		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
3065 
3066 		/* If it's an intent log block, failure is expected. */
3067 		if (zb->zb_level == ZB_ZIL_LEVEL)
3068 			flags |= ZIO_FLAG_SPECULATIVE;
3069 
3070 		mutex_enter(&spa->spa_scrub_lock);
3071 		while (spa->spa_load_verify_ios > max_inflight)
3072 			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
3073 		spa->spa_load_verify_ios++;
3074 		mutex_exit(&spa->spa_scrub_lock);
3075 
3076 		zio_nowait(zio_read(NULL, spa, bp, abd, size,
3077 		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
3078 	}
3079 
3080 	zcb->zcb_readfails = 0;
3081 
3082 	/* only call gethrtime() every 100 blocks */
3083 	static int iters;
3084 	if (++iters > 100)
3085 		iters = 0;
3086 	else
3087 		return (0);
3088 
3089 	if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
3090 		uint64_t now = gethrtime();
3091 		char buf[10];
3092 		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
3093 		int kb_per_sec =
3094 		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
3095 		int sec_remaining =
3096 		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
3097 
3098 		/* make sure nicenum has enough space */
3099 		CTASSERT(sizeof (buf) >= NN_NUMBUF_SZ);
3100 
3101 		zfs_nicenum(bytes, buf, sizeof (buf));
3102 		(void) fprintf(stderr,
3103 		    "\r%5s completed (%4dMB/s) "
3104 		    "estimated time remaining: %uhr %02umin %02usec        ",
3105 		    buf, kb_per_sec / 1024,
3106 		    sec_remaining / 60 / 60,
3107 		    sec_remaining / 60 % 60,
3108 		    sec_remaining % 60);
3109 
3110 		zcb->zcb_lastprint = now;
3111 	}
3112 
3113 	return (0);
3114 }
3115 
3116 static void
3117 zdb_leak(void *arg, uint64_t start, uint64_t size)
3118 {
3119 	vdev_t *vd = arg;
3120 
3121 	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
3122 	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
3123 }
3124 
3125 static metaslab_ops_t zdb_metaslab_ops = {
3126 	NULL	/* alloc */
3127 };
3128 
3129 static void
3130 zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
3131 {
3132 	ddt_bookmark_t ddb;
3133 	ddt_entry_t dde;
3134 	int error;
3135 
3136 	ASSERT(!dump_opt['L']);
3137 
3138 	bzero(&ddb, sizeof (ddb));
3139 	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
3140 		blkptr_t blk;
3141 		ddt_phys_t *ddp = dde.dde_phys;
3142 
3143 		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
3144 			return;
3145 
3146 		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
3147 
3148 		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
3149 			if (ddp->ddp_phys_birth == 0)
3150 				continue;
3151 			ddt_bp_create(ddb.ddb_checksum,
3152 			    &dde.dde_key, ddp, &blk);
3153 			if (p == DDT_PHYS_DITTO) {
3154 				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
3155 			} else {
3156 				zcb->zcb_dedup_asize +=
3157 				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
3158 				zcb->zcb_dedup_blocks++;
3159 			}
3160 		}
3161 		ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
3162 		ddt_enter(ddt);
3163 		VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
3164 		ddt_exit(ddt);
3165 	}
3166 
3167 	ASSERT(error == ENOENT);
3168 }
3169 
3170 /* ARGSUSED */
3171 static void
3172 claim_segment_impl_cb(uint64_t inner_offset, vdev_t *vd, uint64_t offset,
3173     uint64_t size, void *arg)
3174 {
3175 	/*
3176 	 * This callback was called through a remap from
3177 	 * a device being removed. Therefore, the vdev that
3178 	 * this callback is applied to is a concrete
3179 	 * vdev.
3180 	 */
3181 	ASSERT(vdev_is_concrete(vd));
3182 
3183 	VERIFY0(metaslab_claim_impl(vd, offset, size,
3184 	    spa_min_claim_txg(vd->vdev_spa)));
3185 }
3186 
3187 static void
3188 claim_segment_cb(void *arg, uint64_t offset, uint64_t size)
3189 {
3190 	vdev_t *vd = arg;
3191 
3192 	vdev_indirect_ops.vdev_op_remap(vd, offset, size,
3193 	    claim_segment_impl_cb, NULL);
3194 }
3195 
3196 /*
3197  * After accounting for all allocated blocks that are directly referenced,
3198  * we might have missed a reference to a block from a partially complete
3199  * (and thus unused) indirect mapping object. We perform a secondary pass
3200  * through the metaslabs we have already mapped and claim the destination
3201  * blocks.
3202  */
3203 static void
3204 zdb_claim_removing(spa_t *spa, zdb_cb_t *zcb)
3205 {
3206 	if (dump_opt['L'])
3207 		return;
3208 
3209 	if (spa->spa_vdev_removal == NULL)
3210 		return;
3211 
3212 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3213 
3214 	spa_vdev_removal_t *svr = spa->spa_vdev_removal;
3215 	vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id);
3216 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3217 
3218 	for (uint64_t msi = 0; msi < vd->vdev_ms_count; msi++) {
3219 		metaslab_t *msp = vd->vdev_ms[msi];
3220 
3221 		if (msp->ms_start >= vdev_indirect_mapping_max_offset(vim))
3222 			break;
3223 
3224 		ASSERT0(range_tree_space(svr->svr_allocd_segs));
3225 
3226 		if (msp->ms_sm != NULL) {
3227 			VERIFY0(space_map_load(msp->ms_sm,
3228 			    svr->svr_allocd_segs, SM_ALLOC));
3229 
3230 			/*
3231 			 * Clear everything past what has been synced unless
3232 			 * it's past the spacemap, because we have not allocated
3233 			 * mappings for it yet.
3234 			 */
3235 			uint64_t vim_max_offset =
3236 			    vdev_indirect_mapping_max_offset(vim);
3237 			uint64_t sm_end = msp->ms_sm->sm_start +
3238 			    msp->ms_sm->sm_size;
3239 			if (sm_end > vim_max_offset)
3240 				range_tree_clear(svr->svr_allocd_segs,
3241 				    vim_max_offset, sm_end - vim_max_offset);
3242 		}
3243 
3244 		zcb->zcb_removing_size +=
3245 		    range_tree_space(svr->svr_allocd_segs);
3246 		range_tree_vacate(svr->svr_allocd_segs, claim_segment_cb, vd);
3247 	}
3248 
3249 	spa_config_exit(spa, SCL_CONFIG, FTAG);
3250 }
3251 
3252 /* ARGSUSED */
3253 static int
3254 increment_indirect_mapping_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3255 {
3256 	zdb_cb_t *zcb = arg;
3257 	spa_t *spa = zcb->zcb_spa;
3258 	vdev_t *vd;
3259 	const dva_t *dva = &bp->blk_dva[0];
3260 
3261 	ASSERT(!dump_opt['L']);
3262 	ASSERT3U(BP_GET_NDVAS(bp), ==, 1);
3263 
3264 	spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
3265 	vd = vdev_lookup_top(zcb->zcb_spa, DVA_GET_VDEV(dva));
3266 	ASSERT3P(vd, !=, NULL);
3267 	spa_config_exit(spa, SCL_VDEV, FTAG);
3268 
3269 	ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0);
3270 	ASSERT3P(zcb->zcb_vd_obsolete_counts[vd->vdev_id], !=, NULL);
3271 
3272 	vdev_indirect_mapping_increment_obsolete_count(
3273 	    vd->vdev_indirect_mapping,
3274 	    DVA_GET_OFFSET(dva), DVA_GET_ASIZE(dva),
3275 	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3276 
3277 	return (0);
3278 }
3279 
3280 static uint32_t *
3281 zdb_load_obsolete_counts(vdev_t *vd)
3282 {
3283 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3284 	spa_t *spa = vd->vdev_spa;
3285 	spa_condensing_indirect_phys_t *scip =
3286 	    &spa->spa_condensing_indirect_phys;
3287 	uint32_t *counts;
3288 
3289 	EQUIV(vdev_obsolete_sm_object(vd) != 0, vd->vdev_obsolete_sm != NULL);
3290 	counts = vdev_indirect_mapping_load_obsolete_counts(vim);
3291 	if (vd->vdev_obsolete_sm != NULL) {
3292 		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3293 		    vd->vdev_obsolete_sm);
3294 	}
3295 	if (scip->scip_vdev == vd->vdev_id &&
3296 	    scip->scip_prev_obsolete_sm_object != 0) {
3297 		space_map_t *prev_obsolete_sm = NULL;
3298 		VERIFY0(space_map_open(&prev_obsolete_sm, spa->spa_meta_objset,
3299 		    scip->scip_prev_obsolete_sm_object, 0, vd->vdev_asize, 0));
3300 		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3301 		    prev_obsolete_sm);
3302 		space_map_close(prev_obsolete_sm);
3303 	}
3304 	return (counts);
3305 }
3306 
3307 typedef struct checkpoint_sm_exclude_entry_arg {
3308 	vdev_t *cseea_vd;
3309 	uint64_t cseea_checkpoint_size;
3310 } checkpoint_sm_exclude_entry_arg_t;
3311 
3312 static int
3313 checkpoint_sm_exclude_entry_cb(space_map_entry_t *sme, void *arg)
3314 {
3315 	checkpoint_sm_exclude_entry_arg_t *cseea = arg;
3316 	vdev_t *vd = cseea->cseea_vd;
3317 	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
3318 	uint64_t end = sme->sme_offset + sme->sme_run;
3319 
3320 	ASSERT(sme->sme_type == SM_FREE);
3321 
3322 	/*
3323 	 * Since the vdev_checkpoint_sm exists in the vdev level
3324 	 * and the ms_sm space maps exist in the metaslab level,
3325 	 * an entry in the checkpoint space map could theoretically
3326 	 * cross the boundaries of the metaslab that it belongs.
3327 	 *
3328 	 * In reality, because of the way that we populate and
3329 	 * manipulate the checkpoint's space maps currently,
3330 	 * there shouldn't be any entries that cross metaslabs.
3331 	 * Hence the assertion below.
3332 	 *
3333 	 * That said, there is no fundamental requirement that
3334 	 * the checkpoint's space map entries should not cross
3335 	 * metaslab boundaries. So if needed we could add code
3336 	 * that handles metaslab-crossing segments in the future.
3337 	 */
3338 	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
3339 	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
3340 
3341 	/*
3342 	 * By removing the entry from the allocated segments we
3343 	 * also verify that the entry is there to begin with.
3344 	 */
3345 	mutex_enter(&ms->ms_lock);
3346 	range_tree_remove(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
3347 	mutex_exit(&ms->ms_lock);
3348 
3349 	cseea->cseea_checkpoint_size += sme->sme_run;
3350 	return (0);
3351 }
3352 
3353 static void
3354 zdb_leak_init_vdev_exclude_checkpoint(vdev_t *vd, zdb_cb_t *zcb)
3355 {
3356 	spa_t *spa = vd->vdev_spa;
3357 	space_map_t *checkpoint_sm = NULL;
3358 	uint64_t checkpoint_sm_obj;
3359 
3360 	/*
3361 	 * If there is no vdev_top_zap, we are in a pool whose
3362 	 * version predates the pool checkpoint feature.
3363 	 */
3364 	if (vd->vdev_top_zap == 0)
3365 		return;
3366 
3367 	/*
3368 	 * If there is no reference of the vdev_checkpoint_sm in
3369 	 * the vdev_top_zap, then one of the following scenarios
3370 	 * is true:
3371 	 *
3372 	 * 1] There is no checkpoint
3373 	 * 2] There is a checkpoint, but no checkpointed blocks
3374 	 *    have been freed yet
3375 	 * 3] The current vdev is indirect
3376 	 *
3377 	 * In these cases we return immediately.
3378 	 */
3379 	if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
3380 	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
3381 		return;
3382 
3383 	VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
3384 	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1,
3385 	    &checkpoint_sm_obj));
3386 
3387 	checkpoint_sm_exclude_entry_arg_t cseea;
3388 	cseea.cseea_vd = vd;
3389 	cseea.cseea_checkpoint_size = 0;
3390 
3391 	VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
3392 	    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
3393 
3394 	VERIFY0(space_map_iterate(checkpoint_sm,
3395 	    space_map_length(checkpoint_sm),
3396 	    checkpoint_sm_exclude_entry_cb, &cseea));
3397 	space_map_close(checkpoint_sm);
3398 
3399 	zcb->zcb_checkpoint_size += cseea.cseea_checkpoint_size;
3400 }
3401 
3402 static void
3403 zdb_leak_init_exclude_checkpoint(spa_t *spa, zdb_cb_t *zcb)
3404 {
3405 	ASSERT(!dump_opt['L']);
3406 
3407 	vdev_t *rvd = spa->spa_root_vdev;
3408 	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3409 		ASSERT3U(c, ==, rvd->vdev_child[c]->vdev_id);
3410 		zdb_leak_init_vdev_exclude_checkpoint(rvd->vdev_child[c], zcb);
3411 	}
3412 }
3413 
3414 static void
3415 load_concrete_ms_allocatable_trees(spa_t *spa, maptype_t maptype)
3416 {
3417 	vdev_t *rvd = spa->spa_root_vdev;
3418 	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
3419 		vdev_t *vd = rvd->vdev_child[i];
3420 
3421 		ASSERT3U(i, ==, vd->vdev_id);
3422 
3423 		if (vd->vdev_ops == &vdev_indirect_ops)
3424 			continue;
3425 
3426 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3427 			metaslab_t *msp = vd->vdev_ms[m];
3428 
3429 			(void) fprintf(stderr,
3430 			    "\rloading concrete vdev %llu, "
3431 			    "metaslab %llu of %llu ...",
3432 			    (longlong_t)vd->vdev_id,
3433 			    (longlong_t)msp->ms_id,
3434 			    (longlong_t)vd->vdev_ms_count);
3435 
3436 			mutex_enter(&msp->ms_lock);
3437 			metaslab_unload(msp);
3438 
3439 			/*
3440 			 * We don't want to spend the CPU manipulating the
3441 			 * size-ordered tree, so clear the range_tree ops.
3442 			 */
3443 			msp->ms_allocatable->rt_ops = NULL;
3444 
3445 			if (msp->ms_sm != NULL) {
3446 				VERIFY0(space_map_load(msp->ms_sm,
3447 				    msp->ms_allocatable, maptype));
3448 			}
3449 			if (!msp->ms_loaded)
3450 				msp->ms_loaded = B_TRUE;
3451 			mutex_exit(&msp->ms_lock);
3452 		}
3453 	}
3454 }
3455 
3456 /*
3457  * vm_idxp is an in-out parameter which (for indirect vdevs) is the
3458  * index in vim_entries that has the first entry in this metaslab.
3459  * On return, it will be set to the first entry after this metaslab.
3460  */
3461 static void
3462 load_indirect_ms_allocatable_tree(vdev_t *vd, metaslab_t *msp,
3463     uint64_t *vim_idxp)
3464 {
3465 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3466 
3467 	mutex_enter(&msp->ms_lock);
3468 	metaslab_unload(msp);
3469 
3470 	/*
3471 	 * We don't want to spend the CPU manipulating the
3472 	 * size-ordered tree, so clear the range_tree ops.
3473 	 */
3474 	msp->ms_allocatable->rt_ops = NULL;
3475 
3476 	for (; *vim_idxp < vdev_indirect_mapping_num_entries(vim);
3477 	    (*vim_idxp)++) {
3478 		vdev_indirect_mapping_entry_phys_t *vimep =
3479 		    &vim->vim_entries[*vim_idxp];
3480 		uint64_t ent_offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3481 		uint64_t ent_len = DVA_GET_ASIZE(&vimep->vimep_dst);
3482 		ASSERT3U(ent_offset, >=, msp->ms_start);
3483 		if (ent_offset >= msp->ms_start + msp->ms_size)
3484 			break;
3485 
3486 		/*
3487 		 * Mappings do not cross metaslab boundaries,
3488 		 * because we create them by walking the metaslabs.
3489 		 */
3490 		ASSERT3U(ent_offset + ent_len, <=,
3491 		    msp->ms_start + msp->ms_size);
3492 		range_tree_add(msp->ms_allocatable, ent_offset, ent_len);
3493 	}
3494 
3495 	if (!msp->ms_loaded)
3496 		msp->ms_loaded = B_TRUE;
3497 	mutex_exit(&msp->ms_lock);
3498 }
3499 
3500 static void
3501 zdb_leak_init_prepare_indirect_vdevs(spa_t *spa, zdb_cb_t *zcb)
3502 {
3503 	ASSERT(!dump_opt['L']);
3504 
3505 	vdev_t *rvd = spa->spa_root_vdev;
3506 	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3507 		vdev_t *vd = rvd->vdev_child[c];
3508 
3509 		ASSERT3U(c, ==, vd->vdev_id);
3510 
3511 		if (vd->vdev_ops != &vdev_indirect_ops)
3512 			continue;
3513 
3514 		/*
3515 		 * Note: we don't check for mapping leaks on
3516 		 * removing vdevs because their ms_allocatable's
3517 		 * are used to look for leaks in allocated space.
3518 		 */
3519 		zcb->zcb_vd_obsolete_counts[c] = zdb_load_obsolete_counts(vd);
3520 
3521 		/*
3522 		 * Normally, indirect vdevs don't have any
3523 		 * metaslabs.  We want to set them up for
3524 		 * zio_claim().
3525 		 */
3526 		VERIFY0(vdev_metaslab_init(vd, 0));
3527 
3528 		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3529 		uint64_t vim_idx = 0;
3530 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3531 
3532 			(void) fprintf(stderr,
3533 			    "\rloading indirect vdev %llu, "
3534 			    "metaslab %llu of %llu ...",
3535 			    (longlong_t)vd->vdev_id,
3536 			    (longlong_t)vd->vdev_ms[m]->ms_id,
3537 			    (longlong_t)vd->vdev_ms_count);
3538 
3539 			load_indirect_ms_allocatable_tree(vd, vd->vdev_ms[m],
3540 			    &vim_idx);
3541 		}
3542 		ASSERT3U(vim_idx, ==, vdev_indirect_mapping_num_entries(vim));
3543 	}
3544 }
3545 
3546 static void
3547 zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
3548 {
3549 	zcb->zcb_spa = spa;
3550 
3551 	if (dump_opt['L'])
3552 		return;
3553 
3554 	dsl_pool_t *dp = spa->spa_dsl_pool;
3555 	vdev_t *rvd = spa->spa_root_vdev;
3556 
3557 	/*
3558 	 * We are going to be changing the meaning of the metaslab's
3559 	 * ms_allocatable.  Ensure that the allocator doesn't try to
3560 	 * use the tree.
3561 	 */
3562 	spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
3563 	spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
3564 
3565 	zcb->zcb_vd_obsolete_counts =
3566 	    umem_zalloc(rvd->vdev_children * sizeof (uint32_t *),
3567 	    UMEM_NOFAIL);
3568 
3569 	/*
3570 	 * For leak detection, we overload the ms_allocatable trees
3571 	 * to contain allocated segments instead of free segments.
3572 	 * As a result, we can't use the normal metaslab_load/unload
3573 	 * interfaces.
3574 	 */
3575 	zdb_leak_init_prepare_indirect_vdevs(spa, zcb);
3576 	load_concrete_ms_allocatable_trees(spa, SM_ALLOC);
3577 
3578 	/*
3579 	 * On load_concrete_ms_allocatable_trees() we loaded all the
3580 	 * allocated entries from the ms_sm to the ms_allocatable for
3581 	 * each metaslab. If the pool has a checkpoint or is in the
3582 	 * middle of discarding a checkpoint, some of these blocks
3583 	 * may have been freed but their ms_sm may not have been
3584 	 * updated because they are referenced by the checkpoint. In
3585 	 * order to avoid false-positives during leak-detection, we
3586 	 * go through the vdev's checkpoint space map and exclude all
3587 	 * its entries from their relevant ms_allocatable.
3588 	 *
3589 	 * We also aggregate the space held by the checkpoint and add
3590 	 * it to zcb_checkpoint_size.
3591 	 *
3592 	 * Note that at this point we are also verifying that all the
3593 	 * entries on the checkpoint_sm are marked as allocated in
3594 	 * the ms_sm of their relevant metaslab.
3595 	 * [see comment in checkpoint_sm_exclude_entry_cb()]
3596 	 */
3597 	zdb_leak_init_exclude_checkpoint(spa, zcb);
3598 	ASSERT3U(zcb->zcb_checkpoint_size, ==, spa_get_checkpoint_space(spa));
3599 
3600 	/* for cleaner progress output */
3601 	(void) fprintf(stderr, "\n");
3602 
3603 	if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
3604 		ASSERT(spa_feature_is_enabled(spa,
3605 		    SPA_FEATURE_DEVICE_REMOVAL));
3606 		(void) bpobj_iterate_nofree(&dp->dp_obsolete_bpobj,
3607 		    increment_indirect_mapping_cb, zcb, NULL);
3608 	}
3609 
3610 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3611 	zdb_ddt_leak_init(spa, zcb);
3612 	spa_config_exit(spa, SCL_CONFIG, FTAG);
3613 }
3614 
3615 static boolean_t
3616 zdb_check_for_obsolete_leaks(vdev_t *vd, zdb_cb_t *zcb)
3617 {
3618 	boolean_t leaks = B_FALSE;
3619 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3620 	uint64_t total_leaked = 0;
3621 
3622 	ASSERT(vim != NULL);
3623 
3624 	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
3625 		vdev_indirect_mapping_entry_phys_t *vimep =
3626 		    &vim->vim_entries[i];
3627 		uint64_t obsolete_bytes = 0;
3628 		uint64_t offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3629 		metaslab_t *msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
3630 
3631 		/*
3632 		 * This is not very efficient but it's easy to
3633 		 * verify correctness.
3634 		 */
3635 		for (uint64_t inner_offset = 0;
3636 		    inner_offset < DVA_GET_ASIZE(&vimep->vimep_dst);
3637 		    inner_offset += 1 << vd->vdev_ashift) {
3638 			if (range_tree_contains(msp->ms_allocatable,
3639 			    offset + inner_offset, 1 << vd->vdev_ashift)) {
3640 				obsolete_bytes += 1 << vd->vdev_ashift;
3641 			}
3642 		}
3643 
3644 		int64_t bytes_leaked = obsolete_bytes -
3645 		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i];
3646 		ASSERT3U(DVA_GET_ASIZE(&vimep->vimep_dst), >=,
3647 		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i]);
3648 		if (bytes_leaked != 0 &&
3649 		    (vdev_obsolete_counts_are_precise(vd) ||
3650 		    dump_opt['d'] >= 5)) {
3651 			(void) printf("obsolete indirect mapping count "
3652 			    "mismatch on %llu:%llx:%llx : %llx bytes leaked\n",
3653 			    (u_longlong_t)vd->vdev_id,
3654 			    (u_longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
3655 			    (u_longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
3656 			    (u_longlong_t)bytes_leaked);
3657 		}
3658 		total_leaked += ABS(bytes_leaked);
3659 	}
3660 
3661 	if (!vdev_obsolete_counts_are_precise(vd) && total_leaked > 0) {
3662 		int pct_leaked = total_leaked * 100 /
3663 		    vdev_indirect_mapping_bytes_mapped(vim);
3664 		(void) printf("cannot verify obsolete indirect mapping "
3665 		    "counts of vdev %llu because precise feature was not "
3666 		    "enabled when it was removed: %d%% (%llx bytes) of mapping"
3667 		    "unreferenced\n",
3668 		    (u_longlong_t)vd->vdev_id, pct_leaked,
3669 		    (u_longlong_t)total_leaked);
3670 	} else if (total_leaked > 0) {
3671 		(void) printf("obsolete indirect mapping count mismatch "
3672 		    "for vdev %llu -- %llx total bytes mismatched\n",
3673 		    (u_longlong_t)vd->vdev_id,
3674 		    (u_longlong_t)total_leaked);
3675 		leaks |= B_TRUE;
3676 	}
3677 
3678 	vdev_indirect_mapping_free_obsolete_counts(vim,
3679 	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3680 	zcb->zcb_vd_obsolete_counts[vd->vdev_id] = NULL;
3681 
3682 	return (leaks);
3683 }
3684 
3685 static boolean_t
3686 zdb_leak_fini(spa_t *spa, zdb_cb_t *zcb)
3687 {
3688 	if (dump_opt['L'])
3689 		return (B_FALSE);
3690 
3691 	boolean_t leaks = B_FALSE;
3692 
3693 	vdev_t *rvd = spa->spa_root_vdev;
3694 	for (unsigned c = 0; c < rvd->vdev_children; c++) {
3695 		vdev_t *vd = rvd->vdev_child[c];
3696 #if DEBUG
3697 		metaslab_group_t *mg = vd->vdev_mg;
3698 #endif
3699 
3700 		if (zcb->zcb_vd_obsolete_counts[c] != NULL) {
3701 			leaks |= zdb_check_for_obsolete_leaks(vd, zcb);
3702 		}
3703 
3704 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3705 			metaslab_t *msp = vd->vdev_ms[m];
3706 			ASSERT3P(mg, ==, msp->ms_group);
3707 
3708 			/*
3709 			 * ms_allocatable has been overloaded
3710 			 * to contain allocated segments. Now that
3711 			 * we finished traversing all blocks, any
3712 			 * block that remains in the ms_allocatable
3713 			 * represents an allocated block that we
3714 			 * did not claim during the traversal.
3715 			 * Claimed blocks would have been removed
3716 			 * from the ms_allocatable.  For indirect
3717 			 * vdevs, space remaining in the tree
3718 			 * represents parts of the mapping that are
3719 			 * not referenced, which is not a bug.
3720 			 */
3721 			if (vd->vdev_ops == &vdev_indirect_ops) {
3722 				range_tree_vacate(msp->ms_allocatable,
3723 				    NULL, NULL);
3724 			} else {
3725 				range_tree_vacate(msp->ms_allocatable,
3726 				    zdb_leak, vd);
3727 			}
3728 
3729 			if (msp->ms_loaded) {
3730 				msp->ms_loaded = B_FALSE;
3731 			}
3732 		}
3733 
3734 	}
3735 
3736 	umem_free(zcb->zcb_vd_obsolete_counts,
3737 	    rvd->vdev_children * sizeof (uint32_t *));
3738 	zcb->zcb_vd_obsolete_counts = NULL;
3739 
3740 	return (leaks);
3741 }
3742 
3743 /* ARGSUSED */
3744 static int
3745 count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3746 {
3747 	zdb_cb_t *zcb = arg;
3748 
3749 	if (dump_opt['b'] >= 5) {
3750 		char blkbuf[BP_SPRINTF_LEN];
3751 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3752 		(void) printf("[%s] %s\n",
3753 		    "deferred free", blkbuf);
3754 	}
3755 	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
3756 	return (0);
3757 }
3758 
3759 static int
3760 dump_block_stats(spa_t *spa)
3761 {
3762 	zdb_cb_t zcb;
3763 	zdb_blkstats_t *zb, *tzb;
3764 	uint64_t norm_alloc, norm_space, total_alloc, total_found;
3765 	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA |
3766 	    TRAVERSE_NO_DECRYPT | TRAVERSE_HARD;
3767 	boolean_t leaks = B_FALSE;
3768 	int err;
3769 
3770 	bzero(&zcb, sizeof (zcb));
3771 	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
3772 	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
3773 	    (dump_opt['c'] == 1) ? "metadata " : "",
3774 	    dump_opt['c'] ? "checksums " : "",
3775 	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
3776 	    !dump_opt['L'] ? "nothing leaked " : "");
3777 
3778 	/*
3779 	 * When leak detection is enabled we load all space maps as SM_ALLOC
3780 	 * maps, then traverse the pool claiming each block we discover. If
3781 	 * the pool is perfectly consistent, the segment trees will be empty
3782 	 * when we're done. Anything left over is a leak; any block we can't
3783 	 * claim (because it's not part of any space map) is a double
3784 	 * allocation, reference to a freed block, or an unclaimed log block.
3785 	 *
3786 	 * When leak detection is disabled (-L option) we still traverse the
3787 	 * pool claiming each block we discover, but we skip opening any space
3788 	 * maps.
3789 	 */
3790 	bzero(&zcb, sizeof (zdb_cb_t));
3791 	zdb_leak_init(spa, &zcb);
3792 
3793 	/*
3794 	 * If there's a deferred-free bplist, process that first.
3795 	 */
3796 	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
3797 	    count_block_cb, &zcb, NULL);
3798 
3799 	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
3800 		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
3801 		    count_block_cb, &zcb, NULL);
3802 	}
3803 
3804 	zdb_claim_removing(spa, &zcb);
3805 
3806 	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
3807 		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
3808 		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
3809 		    &zcb, NULL));
3810 	}
3811 
3812 	if (dump_opt['c'] > 1)
3813 		flags |= TRAVERSE_PREFETCH_DATA;
3814 
3815 	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
3816 	zcb.zcb_totalasize += metaslab_class_get_alloc(spa_special_class(spa));
3817 	zcb.zcb_totalasize += metaslab_class_get_alloc(spa_dedup_class(spa));
3818 	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
3819 	err = traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
3820 
3821 	/*
3822 	 * If we've traversed the data blocks then we need to wait for those
3823 	 * I/Os to complete. We leverage "The Godfather" zio to wait on
3824 	 * all async I/Os to complete.
3825 	 */
3826 	if (dump_opt['c']) {
3827 		for (int i = 0; i < max_ncpus; i++) {
3828 			(void) zio_wait(spa->spa_async_zio_root[i]);
3829 			spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
3830 			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
3831 			    ZIO_FLAG_GODFATHER);
3832 		}
3833 	}
3834 
3835 	/*
3836 	 * Done after zio_wait() since zcb_haderrors is modified in
3837 	 * zdb_blkptr_done()
3838 	 */
3839 	zcb.zcb_haderrors |= err;
3840 
3841 	if (zcb.zcb_haderrors) {
3842 		(void) printf("\nError counts:\n\n");
3843 		(void) printf("\t%5s  %s\n", "errno", "count");
3844 		for (int e = 0; e < 256; e++) {
3845 			if (zcb.zcb_errors[e] != 0) {
3846 				(void) printf("\t%5d  %llu\n",
3847 				    e, (u_longlong_t)zcb.zcb_errors[e]);
3848 			}
3849 		}
3850 	}
3851 
3852 	/*
3853 	 * Report any leaked segments.
3854 	 */
3855 	leaks |= zdb_leak_fini(spa, &zcb);
3856 
3857 	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
3858 
3859 	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
3860 	norm_space = metaslab_class_get_space(spa_normal_class(spa));
3861 
3862 	total_alloc = norm_alloc +
3863 	    metaslab_class_get_alloc(spa_log_class(spa)) +
3864 	    metaslab_class_get_alloc(spa_special_class(spa)) +
3865 	    metaslab_class_get_alloc(spa_dedup_class(spa));
3866 	total_found = tzb->zb_asize - zcb.zcb_dedup_asize +
3867 	    zcb.zcb_removing_size + zcb.zcb_checkpoint_size;
3868 
3869 	if (total_found == total_alloc && !dump_opt['L']) {
3870 		(void) printf("\n\tNo leaks (block sum matches space"
3871 		    " maps exactly)\n");
3872 	} else if (!dump_opt['L']) {
3873 		(void) printf("block traversal size %llu != alloc %llu "
3874 		    "(%s %lld)\n",
3875 		    (u_longlong_t)total_found,
3876 		    (u_longlong_t)total_alloc,
3877 		    (dump_opt['L']) ? "unreachable" : "leaked",
3878 		    (longlong_t)(total_alloc - total_found));
3879 		leaks = B_TRUE;
3880 	}
3881 
3882 	if (tzb->zb_count == 0)
3883 		return (2);
3884 
3885 	(void) printf("\n");
3886 	(void) printf("\t%-16s %14llu\n", "bp count:",
3887 	    (u_longlong_t)tzb->zb_count);
3888 	(void) printf("\t%-16s %14llu\n", "ganged count:",
3889 	    (longlong_t)tzb->zb_gangs);
3890 	(void) printf("\t%-16s %14llu      avg: %6llu\n", "bp logical:",
3891 	    (u_longlong_t)tzb->zb_lsize,
3892 	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
3893 	(void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
3894 	    "bp physical:", (u_longlong_t)tzb->zb_psize,
3895 	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
3896 	    (double)tzb->zb_lsize / tzb->zb_psize);
3897 	(void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
3898 	    "bp allocated:", (u_longlong_t)tzb->zb_asize,
3899 	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
3900 	    (double)tzb->zb_lsize / tzb->zb_asize);
3901 	(void) printf("\t%-16s %14llu    ref>1: %6llu   deduplication: %6.2f\n",
3902 	    "bp deduped:", (u_longlong_t)zcb.zcb_dedup_asize,
3903 	    (u_longlong_t)zcb.zcb_dedup_blocks,
3904 	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
3905 	(void) printf("\t%-16s %14llu     used: %5.2f%%\n", "Normal class:",
3906 	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
3907 
3908 	if (spa_special_class(spa)->mc_rotor != NULL) {
3909 		uint64_t alloc = metaslab_class_get_alloc(
3910 		    spa_special_class(spa));
3911 		uint64_t space = metaslab_class_get_space(
3912 		    spa_special_class(spa));
3913 
3914 		(void) printf("\t%-16s %14llu     used: %5.2f%%\n",
3915 		    "Special class", (u_longlong_t)alloc,
3916 		    100.0 * alloc / space);
3917 	}
3918 
3919 	if (spa_dedup_class(spa)->mc_rotor != NULL) {
3920 		uint64_t alloc = metaslab_class_get_alloc(
3921 		    spa_dedup_class(spa));
3922 		uint64_t space = metaslab_class_get_space(
3923 		    spa_dedup_class(spa));
3924 
3925 		(void) printf("\t%-16s %14llu     used: %5.2f%%\n",
3926 		    "Dedup class", (u_longlong_t)alloc,
3927 		    100.0 * alloc / space);
3928 	}
3929 
3930 	for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
3931 		if (zcb.zcb_embedded_blocks[i] == 0)
3932 			continue;
3933 		(void) printf("\n");
3934 		(void) printf("\tadditional, non-pointer bps of type %u: "
3935 		    "%10llu\n",
3936 		    i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
3937 
3938 		if (dump_opt['b'] >= 3) {
3939 			(void) printf("\t number of (compressed) bytes:  "
3940 			    "number of bps\n");
3941 			dump_histogram(zcb.zcb_embedded_histogram[i],
3942 			    sizeof (zcb.zcb_embedded_histogram[i]) /
3943 			    sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
3944 		}
3945 	}
3946 
3947 	if (tzb->zb_ditto_samevdev != 0) {
3948 		(void) printf("\tDittoed blocks on same vdev: %llu\n",
3949 		    (longlong_t)tzb->zb_ditto_samevdev);
3950 	}
3951 	if (tzb->zb_ditto_same_ms != 0) {
3952 		(void) printf("\tDittoed blocks in same metaslab: %llu\n",
3953 		    (longlong_t)tzb->zb_ditto_same_ms);
3954 	}
3955 
3956 	for (uint64_t v = 0; v < spa->spa_root_vdev->vdev_children; v++) {
3957 		vdev_t *vd = spa->spa_root_vdev->vdev_child[v];
3958 		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3959 
3960 		if (vim == NULL) {
3961 			continue;
3962 		}
3963 
3964 		char mem[32];
3965 		zdb_nicenum(vdev_indirect_mapping_num_entries(vim),
3966 		    mem, vdev_indirect_mapping_size(vim));
3967 
3968 		(void) printf("\tindirect vdev id %llu has %llu segments "
3969 		    "(%s in memory)\n",
3970 		    (longlong_t)vd->vdev_id,
3971 		    (longlong_t)vdev_indirect_mapping_num_entries(vim), mem);
3972 	}
3973 
3974 	if (dump_opt['b'] >= 2) {
3975 		int l, t, level;
3976 		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
3977 		    "\t  avg\t comp\t%%Total\tType\n");
3978 
3979 		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
3980 			char csize[32], lsize[32], psize[32], asize[32];
3981 			char avg[32], gang[32];
3982 			const char *typename;
3983 
3984 			/* make sure nicenum has enough space */
3985 			CTASSERT(sizeof (csize) >= NN_NUMBUF_SZ);
3986 			CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
3987 			CTASSERT(sizeof (psize) >= NN_NUMBUF_SZ);
3988 			CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
3989 			CTASSERT(sizeof (avg) >= NN_NUMBUF_SZ);
3990 			CTASSERT(sizeof (gang) >= NN_NUMBUF_SZ);
3991 
3992 			if (t < DMU_OT_NUMTYPES)
3993 				typename = dmu_ot[t].ot_name;
3994 			else
3995 				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
3996 
3997 			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
3998 				(void) printf("%6s\t%5s\t%5s\t%5s"
3999 				    "\t%5s\t%5s\t%6s\t%s\n",
4000 				    "-",
4001 				    "-",
4002 				    "-",
4003 				    "-",
4004 				    "-",
4005 				    "-",
4006 				    "-",
4007 				    typename);
4008 				continue;
4009 			}
4010 
4011 			for (l = ZB_TOTAL - 1; l >= -1; l--) {
4012 				level = (l == -1 ? ZB_TOTAL : l);
4013 				zb = &zcb.zcb_type[level][t];
4014 
4015 				if (zb->zb_asize == 0)
4016 					continue;
4017 
4018 				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
4019 					continue;
4020 
4021 				if (level == 0 && zb->zb_asize ==
4022 				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
4023 					continue;
4024 
4025 				zdb_nicenum(zb->zb_count, csize,
4026 				    sizeof (csize));
4027 				zdb_nicenum(zb->zb_lsize, lsize,
4028 				    sizeof (lsize));
4029 				zdb_nicenum(zb->zb_psize, psize,
4030 				    sizeof (psize));
4031 				zdb_nicenum(zb->zb_asize, asize,
4032 				    sizeof (asize));
4033 				zdb_nicenum(zb->zb_asize / zb->zb_count, avg,
4034 				    sizeof (avg));
4035 				zdb_nicenum(zb->zb_gangs, gang, sizeof (gang));
4036 
4037 				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
4038 				    "\t%5.2f\t%6.2f\t",
4039 				    csize, lsize, psize, asize, avg,
4040 				    (double)zb->zb_lsize / zb->zb_psize,
4041 				    100.0 * zb->zb_asize / tzb->zb_asize);
4042 
4043 				if (level == ZB_TOTAL)
4044 					(void) printf("%s\n", typename);
4045 				else
4046 					(void) printf("    L%d %s\n",
4047 					    level, typename);
4048 
4049 				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
4050 					(void) printf("\t number of ganged "
4051 					    "blocks: %s\n", gang);
4052 				}
4053 
4054 				if (dump_opt['b'] >= 4) {
4055 					(void) printf("psize "
4056 					    "(in 512-byte sectors): "
4057 					    "number of blocks\n");
4058 					dump_histogram(zb->zb_psize_histogram,
4059 					    PSIZE_HISTO_SIZE, 0);
4060 				}
4061 			}
4062 		}
4063 	}
4064 
4065 	(void) printf("\n");
4066 
4067 	if (leaks)
4068 		return (2);
4069 
4070 	if (zcb.zcb_haderrors)
4071 		return (3);
4072 
4073 	return (0);
4074 }
4075 
4076 typedef struct zdb_ddt_entry {
4077 	ddt_key_t	zdde_key;
4078 	uint64_t	zdde_ref_blocks;
4079 	uint64_t	zdde_ref_lsize;
4080 	uint64_t	zdde_ref_psize;
4081 	uint64_t	zdde_ref_dsize;
4082 	avl_node_t	zdde_node;
4083 } zdb_ddt_entry_t;
4084 
4085 /* ARGSUSED */
4086 static int
4087 zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
4088     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
4089 {
4090 	avl_tree_t *t = arg;
4091 	avl_index_t where;
4092 	zdb_ddt_entry_t *zdde, zdde_search;
4093 
4094 	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
4095 		return (0);
4096 
4097 	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
4098 		(void) printf("traversing objset %llu, %llu objects, "
4099 		    "%lu blocks so far\n",
4100 		    (u_longlong_t)zb->zb_objset,
4101 		    (u_longlong_t)BP_GET_FILL(bp),
4102 		    avl_numnodes(t));
4103 	}
4104 
4105 	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
4106 	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
4107 		return (0);
4108 
4109 	ddt_key_fill(&zdde_search.zdde_key, bp);
4110 
4111 	zdde = avl_find(t, &zdde_search, &where);
4112 
4113 	if (zdde == NULL) {
4114 		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
4115 		zdde->zdde_key = zdde_search.zdde_key;
4116 		avl_insert(t, zdde, where);
4117 	}
4118 
4119 	zdde->zdde_ref_blocks += 1;
4120 	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
4121 	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
4122 	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
4123 
4124 	return (0);
4125 }
4126 
4127 static void
4128 dump_simulated_ddt(spa_t *spa)
4129 {
4130 	avl_tree_t t;
4131 	void *cookie = NULL;
4132 	zdb_ddt_entry_t *zdde;
4133 	ddt_histogram_t ddh_total;
4134 	ddt_stat_t dds_total;
4135 
4136 	bzero(&ddh_total, sizeof (ddh_total));
4137 	bzero(&dds_total, sizeof (dds_total));
4138 	avl_create(&t, ddt_entry_compare,
4139 	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
4140 
4141 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4142 
4143 	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA |
4144 	    TRAVERSE_NO_DECRYPT, zdb_ddt_add_cb, &t);
4145 
4146 	spa_config_exit(spa, SCL_CONFIG, FTAG);
4147 
4148 	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
4149 		ddt_stat_t dds;
4150 		uint64_t refcnt = zdde->zdde_ref_blocks;
4151 		ASSERT(refcnt != 0);
4152 
4153 		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
4154 		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
4155 		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
4156 		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
4157 
4158 		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
4159 		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
4160 		dds.dds_ref_psize = zdde->zdde_ref_psize;
4161 		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
4162 
4163 		ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
4164 		    &dds, 0);
4165 
4166 		umem_free(zdde, sizeof (*zdde));
4167 	}
4168 
4169 	avl_destroy(&t);
4170 
4171 	ddt_histogram_stat(&dds_total, &ddh_total);
4172 
4173 	(void) printf("Simulated DDT histogram:\n");
4174 
4175 	zpool_dump_ddt(&dds_total, &ddh_total);
4176 
4177 	dump_dedup_ratio(&dds_total);
4178 }
4179 
4180 static int
4181 verify_device_removal_feature_counts(spa_t *spa)
4182 {
4183 	uint64_t dr_feature_refcount = 0;
4184 	uint64_t oc_feature_refcount = 0;
4185 	uint64_t indirect_vdev_count = 0;
4186 	uint64_t precise_vdev_count = 0;
4187 	uint64_t obsolete_counts_object_count = 0;
4188 	uint64_t obsolete_sm_count = 0;
4189 	uint64_t obsolete_counts_count = 0;
4190 	uint64_t scip_count = 0;
4191 	uint64_t obsolete_bpobj_count = 0;
4192 	int ret = 0;
4193 
4194 	spa_condensing_indirect_phys_t *scip =
4195 	    &spa->spa_condensing_indirect_phys;
4196 	if (scip->scip_next_mapping_object != 0) {
4197 		vdev_t *vd = spa->spa_root_vdev->vdev_child[scip->scip_vdev];
4198 		ASSERT(scip->scip_prev_obsolete_sm_object != 0);
4199 		ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops);
4200 
4201 		(void) printf("Condensing indirect vdev %llu: new mapping "
4202 		    "object %llu, prev obsolete sm %llu\n",
4203 		    (u_longlong_t)scip->scip_vdev,
4204 		    (u_longlong_t)scip->scip_next_mapping_object,
4205 		    (u_longlong_t)scip->scip_prev_obsolete_sm_object);
4206 		if (scip->scip_prev_obsolete_sm_object != 0) {
4207 			space_map_t *prev_obsolete_sm = NULL;
4208 			VERIFY0(space_map_open(&prev_obsolete_sm,
4209 			    spa->spa_meta_objset,
4210 			    scip->scip_prev_obsolete_sm_object,
4211 			    0, vd->vdev_asize, 0));
4212 			dump_spacemap(spa->spa_meta_objset, prev_obsolete_sm);
4213 			(void) printf("\n");
4214 			space_map_close(prev_obsolete_sm);
4215 		}
4216 
4217 		scip_count += 2;
4218 	}
4219 
4220 	for (uint64_t i = 0; i < spa->spa_root_vdev->vdev_children; i++) {
4221 		vdev_t *vd = spa->spa_root_vdev->vdev_child[i];
4222 		vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
4223 
4224 		if (vic->vic_mapping_object != 0) {
4225 			ASSERT(vd->vdev_ops == &vdev_indirect_ops ||
4226 			    vd->vdev_removing);
4227 			indirect_vdev_count++;
4228 
4229 			if (vd->vdev_indirect_mapping->vim_havecounts) {
4230 				obsolete_counts_count++;
4231 			}
4232 		}
4233 		if (vdev_obsolete_counts_are_precise(vd)) {
4234 			ASSERT(vic->vic_mapping_object != 0);
4235 			precise_vdev_count++;
4236 		}
4237 		if (vdev_obsolete_sm_object(vd) != 0) {
4238 			ASSERT(vic->vic_mapping_object != 0);
4239 			obsolete_sm_count++;
4240 		}
4241 	}
4242 
4243 	(void) feature_get_refcount(spa,
4244 	    &spa_feature_table[SPA_FEATURE_DEVICE_REMOVAL],
4245 	    &dr_feature_refcount);
4246 	(void) feature_get_refcount(spa,
4247 	    &spa_feature_table[SPA_FEATURE_OBSOLETE_COUNTS],
4248 	    &oc_feature_refcount);
4249 
4250 	if (dr_feature_refcount != indirect_vdev_count) {
4251 		ret = 1;
4252 		(void) printf("Number of indirect vdevs (%llu) " \
4253 		    "does not match feature count (%llu)\n",
4254 		    (u_longlong_t)indirect_vdev_count,
4255 		    (u_longlong_t)dr_feature_refcount);
4256 	} else {
4257 		(void) printf("Verified device_removal feature refcount " \
4258 		    "of %llu is correct\n",
4259 		    (u_longlong_t)dr_feature_refcount);
4260 	}
4261 
4262 	if (zap_contains(spa_meta_objset(spa), DMU_POOL_DIRECTORY_OBJECT,
4263 	    DMU_POOL_OBSOLETE_BPOBJ) == 0) {
4264 		obsolete_bpobj_count++;
4265 	}
4266 
4267 
4268 	obsolete_counts_object_count = precise_vdev_count;
4269 	obsolete_counts_object_count += obsolete_sm_count;
4270 	obsolete_counts_object_count += obsolete_counts_count;
4271 	obsolete_counts_object_count += scip_count;
4272 	obsolete_counts_object_count += obsolete_bpobj_count;
4273 	obsolete_counts_object_count += remap_deadlist_count;
4274 
4275 	if (oc_feature_refcount != obsolete_counts_object_count) {
4276 		ret = 1;
4277 		(void) printf("Number of obsolete counts objects (%llu) " \
4278 		    "does not match feature count (%llu)\n",
4279 		    (u_longlong_t)obsolete_counts_object_count,
4280 		    (u_longlong_t)oc_feature_refcount);
4281 		(void) printf("pv:%llu os:%llu oc:%llu sc:%llu "
4282 		    "ob:%llu rd:%llu\n",
4283 		    (u_longlong_t)precise_vdev_count,
4284 		    (u_longlong_t)obsolete_sm_count,
4285 		    (u_longlong_t)obsolete_counts_count,
4286 		    (u_longlong_t)scip_count,
4287 		    (u_longlong_t)obsolete_bpobj_count,
4288 		    (u_longlong_t)remap_deadlist_count);
4289 	} else {
4290 		(void) printf("Verified indirect_refcount feature refcount " \
4291 		    "of %llu is correct\n",
4292 		    (u_longlong_t)oc_feature_refcount);
4293 	}
4294 	return (ret);
4295 }
4296 
4297 static void
4298 zdb_set_skip_mmp(char *target)
4299 {
4300 	spa_t *spa;
4301 
4302 	/*
4303 	 * Disable the activity check to allow examination of
4304 	 * active pools.
4305 	 */
4306 	mutex_enter(&spa_namespace_lock);
4307 	if ((spa = spa_lookup(target)) != NULL) {
4308 		spa->spa_import_flags |= ZFS_IMPORT_SKIP_MMP;
4309 	}
4310 	mutex_exit(&spa_namespace_lock);
4311 }
4312 
4313 #define	BOGUS_SUFFIX "_CHECKPOINTED_UNIVERSE"
4314 /*
4315  * Import the checkpointed state of the pool specified by the target
4316  * parameter as readonly. The function also accepts a pool config
4317  * as an optional parameter, else it attempts to infer the config by
4318  * the name of the target pool.
4319  *
4320  * Note that the checkpointed state's pool name will be the name of
4321  * the original pool with the above suffix appened to it. In addition,
4322  * if the target is not a pool name (e.g. a path to a dataset) then
4323  * the new_path parameter is populated with the updated path to
4324  * reflect the fact that we are looking into the checkpointed state.
4325  *
4326  * The function returns a newly-allocated copy of the name of the
4327  * pool containing the checkpointed state. When this copy is no
4328  * longer needed it should be freed with free(3C). Same thing
4329  * applies to the new_path parameter if allocated.
4330  */
4331 static char *
4332 import_checkpointed_state(char *target, nvlist_t *cfg, char **new_path)
4333 {
4334 	int error = 0;
4335 	char *poolname, *bogus_name;
4336 
4337 	/* If the target is not a pool, the extract the pool name */
4338 	char *path_start = strchr(target, '/');
4339 	if (path_start != NULL) {
4340 		size_t poolname_len = path_start - target;
4341 		poolname = strndup(target, poolname_len);
4342 	} else {
4343 		poolname = target;
4344 	}
4345 
4346 	if (cfg == NULL) {
4347 		zdb_set_skip_mmp(poolname);
4348 		error = spa_get_stats(poolname, &cfg, NULL, 0);
4349 		if (error != 0) {
4350 			fatal("Tried to read config of pool \"%s\" but "
4351 			    "spa_get_stats() failed with error %d\n",
4352 			    poolname, error);
4353 		}
4354 	}
4355 
4356 	(void) asprintf(&bogus_name, "%s%s", poolname, BOGUS_SUFFIX);
4357 	fnvlist_add_string(cfg, ZPOOL_CONFIG_POOL_NAME, bogus_name);
4358 
4359 	error = spa_import(bogus_name, cfg, NULL,
4360 	    ZFS_IMPORT_MISSING_LOG | ZFS_IMPORT_CHECKPOINT |
4361 	    ZFS_IMPORT_SKIP_MMP);
4362 	if (error != 0) {
4363 		fatal("Tried to import pool \"%s\" but spa_import() failed "
4364 		    "with error %d\n", bogus_name, error);
4365 	}
4366 
4367 	if (new_path != NULL && path_start != NULL)
4368 		(void) asprintf(new_path, "%s%s", bogus_name, path_start);
4369 
4370 	if (target != poolname)
4371 		free(poolname);
4372 
4373 	return (bogus_name);
4374 }
4375 
4376 typedef struct verify_checkpoint_sm_entry_cb_arg {
4377 	vdev_t *vcsec_vd;
4378 
4379 	/* the following fields are only used for printing progress */
4380 	uint64_t vcsec_entryid;
4381 	uint64_t vcsec_num_entries;
4382 } verify_checkpoint_sm_entry_cb_arg_t;
4383 
4384 #define	ENTRIES_PER_PROGRESS_UPDATE 10000
4385 
4386 static int
4387 verify_checkpoint_sm_entry_cb(space_map_entry_t *sme, void *arg)
4388 {
4389 	verify_checkpoint_sm_entry_cb_arg_t *vcsec = arg;
4390 	vdev_t *vd = vcsec->vcsec_vd;
4391 	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
4392 	uint64_t end = sme->sme_offset + sme->sme_run;
4393 
4394 	ASSERT(sme->sme_type == SM_FREE);
4395 
4396 	if ((vcsec->vcsec_entryid % ENTRIES_PER_PROGRESS_UPDATE) == 0) {
4397 		(void) fprintf(stderr,
4398 		    "\rverifying vdev %llu, space map entry %llu of %llu ...",
4399 		    (longlong_t)vd->vdev_id,
4400 		    (longlong_t)vcsec->vcsec_entryid,
4401 		    (longlong_t)vcsec->vcsec_num_entries);
4402 	}
4403 	vcsec->vcsec_entryid++;
4404 
4405 	/*
4406 	 * See comment in checkpoint_sm_exclude_entry_cb()
4407 	 */
4408 	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
4409 	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
4410 
4411 	/*
4412 	 * The entries in the vdev_checkpoint_sm should be marked as
4413 	 * allocated in the checkpointed state of the pool, therefore
4414 	 * their respective ms_allocateable trees should not contain them.
4415 	 */
4416 	mutex_enter(&ms->ms_lock);
4417 	range_tree_verify_not_present(ms->ms_allocatable,
4418 	    sme->sme_offset, sme->sme_run);
4419 	mutex_exit(&ms->ms_lock);
4420 
4421 	return (0);
4422 }
4423 
4424 /*
4425  * Verify that all segments in the vdev_checkpoint_sm are allocated
4426  * according to the checkpoint's ms_sm (i.e. are not in the checkpoint's
4427  * ms_allocatable).
4428  *
4429  * Do so by comparing the checkpoint space maps (vdev_checkpoint_sm) of
4430  * each vdev in the current state of the pool to the metaslab space maps
4431  * (ms_sm) of the checkpointed state of the pool.
4432  *
4433  * Note that the function changes the state of the ms_allocatable
4434  * trees of the current spa_t. The entries of these ms_allocatable
4435  * trees are cleared out and then repopulated from with the free
4436  * entries of their respective ms_sm space maps.
4437  */
4438 static void
4439 verify_checkpoint_vdev_spacemaps(spa_t *checkpoint, spa_t *current)
4440 {
4441 	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4442 	vdev_t *current_rvd = current->spa_root_vdev;
4443 
4444 	load_concrete_ms_allocatable_trees(checkpoint, SM_FREE);
4445 
4446 	for (uint64_t c = 0; c < ckpoint_rvd->vdev_children; c++) {
4447 		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[c];
4448 		vdev_t *current_vd = current_rvd->vdev_child[c];
4449 
4450 		space_map_t *checkpoint_sm = NULL;
4451 		uint64_t checkpoint_sm_obj;
4452 
4453 		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4454 			/*
4455 			 * Since we don't allow device removal in a pool
4456 			 * that has a checkpoint, we expect that all removed
4457 			 * vdevs were removed from the pool before the
4458 			 * checkpoint.
4459 			 */
4460 			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4461 			continue;
4462 		}
4463 
4464 		/*
4465 		 * If the checkpoint space map doesn't exist, then nothing
4466 		 * here is checkpointed so there's nothing to verify.
4467 		 */
4468 		if (current_vd->vdev_top_zap == 0 ||
4469 		    zap_contains(spa_meta_objset(current),
4470 		    current_vd->vdev_top_zap,
4471 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4472 			continue;
4473 
4474 		VERIFY0(zap_lookup(spa_meta_objset(current),
4475 		    current_vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4476 		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4477 
4478 		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(current),
4479 		    checkpoint_sm_obj, 0, current_vd->vdev_asize,
4480 		    current_vd->vdev_ashift));
4481 
4482 		verify_checkpoint_sm_entry_cb_arg_t vcsec;
4483 		vcsec.vcsec_vd = ckpoint_vd;
4484 		vcsec.vcsec_entryid = 0;
4485 		vcsec.vcsec_num_entries =
4486 		    space_map_length(checkpoint_sm) / sizeof (uint64_t);
4487 		VERIFY0(space_map_iterate(checkpoint_sm,
4488 		    space_map_length(checkpoint_sm),
4489 		    verify_checkpoint_sm_entry_cb, &vcsec));
4490 		dump_spacemap(current->spa_meta_objset, checkpoint_sm);
4491 		space_map_close(checkpoint_sm);
4492 	}
4493 
4494 	/*
4495 	 * If we've added vdevs since we took the checkpoint, ensure
4496 	 * that their checkpoint space maps are empty.
4497 	 */
4498 	if (ckpoint_rvd->vdev_children < current_rvd->vdev_children) {
4499 		for (uint64_t c = ckpoint_rvd->vdev_children;
4500 		    c < current_rvd->vdev_children; c++) {
4501 			vdev_t *current_vd = current_rvd->vdev_child[c];
4502 			ASSERT3P(current_vd->vdev_checkpoint_sm, ==, NULL);
4503 		}
4504 	}
4505 
4506 	/* for cleaner progress output */
4507 	(void) fprintf(stderr, "\n");
4508 }
4509 
4510 /*
4511  * Verifies that all space that's allocated in the checkpoint is
4512  * still allocated in the current version, by checking that everything
4513  * in checkpoint's ms_allocatable (which is actually allocated, not
4514  * allocatable/free) is not present in current's ms_allocatable.
4515  *
4516  * Note that the function changes the state of the ms_allocatable
4517  * trees of both spas when called. The entries of all ms_allocatable
4518  * trees are cleared out and then repopulated from their respective
4519  * ms_sm space maps. In the checkpointed state we load the allocated
4520  * entries, and in the current state we load the free entries.
4521  */
4522 static void
4523 verify_checkpoint_ms_spacemaps(spa_t *checkpoint, spa_t *current)
4524 {
4525 	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4526 	vdev_t *current_rvd = current->spa_root_vdev;
4527 
4528 	load_concrete_ms_allocatable_trees(checkpoint, SM_ALLOC);
4529 	load_concrete_ms_allocatable_trees(current, SM_FREE);
4530 
4531 	for (uint64_t i = 0; i < ckpoint_rvd->vdev_children; i++) {
4532 		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[i];
4533 		vdev_t *current_vd = current_rvd->vdev_child[i];
4534 
4535 		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4536 			/*
4537 			 * See comment in verify_checkpoint_vdev_spacemaps()
4538 			 */
4539 			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4540 			continue;
4541 		}
4542 
4543 		for (uint64_t m = 0; m < ckpoint_vd->vdev_ms_count; m++) {
4544 			metaslab_t *ckpoint_msp = ckpoint_vd->vdev_ms[m];
4545 			metaslab_t *current_msp = current_vd->vdev_ms[m];
4546 
4547 			(void) fprintf(stderr,
4548 			    "\rverifying vdev %llu of %llu, "
4549 			    "metaslab %llu of %llu ...",
4550 			    (longlong_t)current_vd->vdev_id,
4551 			    (longlong_t)current_rvd->vdev_children,
4552 			    (longlong_t)current_vd->vdev_ms[m]->ms_id,
4553 			    (longlong_t)current_vd->vdev_ms_count);
4554 
4555 			/*
4556 			 * We walk through the ms_allocatable trees that
4557 			 * are loaded with the allocated blocks from the
4558 			 * ms_sm spacemaps of the checkpoint. For each
4559 			 * one of these ranges we ensure that none of them
4560 			 * exists in the ms_allocatable trees of the
4561 			 * current state which are loaded with the ranges
4562 			 * that are currently free.
4563 			 *
4564 			 * This way we ensure that none of the blocks that
4565 			 * are part of the checkpoint were freed by mistake.
4566 			 */
4567 			range_tree_walk(ckpoint_msp->ms_allocatable,
4568 			    (range_tree_func_t *)range_tree_verify_not_present,
4569 			    current_msp->ms_allocatable);
4570 		}
4571 	}
4572 
4573 	/* for cleaner progress output */
4574 	(void) fprintf(stderr, "\n");
4575 }
4576 
4577 static void
4578 verify_checkpoint_blocks(spa_t *spa)
4579 {
4580 	ASSERT(!dump_opt['L']);
4581 
4582 	spa_t *checkpoint_spa;
4583 	char *checkpoint_pool;
4584 	nvlist_t *config = NULL;
4585 	int error = 0;
4586 
4587 	/*
4588 	 * We import the checkpointed state of the pool (under a different
4589 	 * name) so we can do verification on it against the current state
4590 	 * of the pool.
4591 	 */
4592 	checkpoint_pool = import_checkpointed_state(spa->spa_name, config,
4593 	    NULL);
4594 	ASSERT(strcmp(spa->spa_name, checkpoint_pool) != 0);
4595 
4596 	error = spa_open(checkpoint_pool, &checkpoint_spa, FTAG);
4597 	if (error != 0) {
4598 		fatal("Tried to open pool \"%s\" but spa_open() failed with "
4599 		    "error %d\n", checkpoint_pool, error);
4600 	}
4601 
4602 	/*
4603 	 * Ensure that ranges in the checkpoint space maps of each vdev
4604 	 * are allocated according to the checkpointed state's metaslab
4605 	 * space maps.
4606 	 */
4607 	verify_checkpoint_vdev_spacemaps(checkpoint_spa, spa);
4608 
4609 	/*
4610 	 * Ensure that allocated ranges in the checkpoint's metaslab
4611 	 * space maps remain allocated in the metaslab space maps of
4612 	 * the current state.
4613 	 */
4614 	verify_checkpoint_ms_spacemaps(checkpoint_spa, spa);
4615 
4616 	/*
4617 	 * Once we are done, we get rid of the checkpointed state.
4618 	 */
4619 	spa_close(checkpoint_spa, FTAG);
4620 	free(checkpoint_pool);
4621 }
4622 
4623 static void
4624 dump_leftover_checkpoint_blocks(spa_t *spa)
4625 {
4626 	vdev_t *rvd = spa->spa_root_vdev;
4627 
4628 	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
4629 		vdev_t *vd = rvd->vdev_child[i];
4630 
4631 		space_map_t *checkpoint_sm = NULL;
4632 		uint64_t checkpoint_sm_obj;
4633 
4634 		if (vd->vdev_top_zap == 0)
4635 			continue;
4636 
4637 		if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
4638 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4639 			continue;
4640 
4641 		VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
4642 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4643 		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4644 
4645 		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
4646 		    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
4647 		dump_spacemap(spa->spa_meta_objset, checkpoint_sm);
4648 		space_map_close(checkpoint_sm);
4649 	}
4650 }
4651 
4652 static int
4653 verify_checkpoint(spa_t *spa)
4654 {
4655 	uberblock_t checkpoint;
4656 	int error;
4657 
4658 	if (!spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT))
4659 		return (0);
4660 
4661 	error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
4662 	    DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t),
4663 	    sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint);
4664 
4665 	if (error == ENOENT && !dump_opt['L']) {
4666 		/*
4667 		 * If the feature is active but the uberblock is missing
4668 		 * then we must be in the middle of discarding the
4669 		 * checkpoint.
4670 		 */
4671 		(void) printf("\nPartially discarded checkpoint "
4672 		    "state found:\n");
4673 		dump_leftover_checkpoint_blocks(spa);
4674 		return (0);
4675 	} else if (error != 0) {
4676 		(void) printf("lookup error %d when looking for "
4677 		    "checkpointed uberblock in MOS\n", error);
4678 		return (error);
4679 	}
4680 	dump_uberblock(&checkpoint, "\nCheckpointed uberblock found:\n", "\n");
4681 
4682 	if (checkpoint.ub_checkpoint_txg == 0) {
4683 		(void) printf("\nub_checkpoint_txg not set in checkpointed "
4684 		    "uberblock\n");
4685 		error = 3;
4686 	}
4687 
4688 	if (error == 0 && !dump_opt['L'])
4689 		verify_checkpoint_blocks(spa);
4690 
4691 	return (error);
4692 }
4693 
4694 /* ARGSUSED */
4695 static void
4696 mos_leaks_cb(void *arg, uint64_t start, uint64_t size)
4697 {
4698 	for (uint64_t i = start; i < size; i++) {
4699 		(void) printf("MOS object %llu referenced but not allocated\n",
4700 		    (u_longlong_t)i);
4701 	}
4702 }
4703 
4704 static range_tree_t *mos_refd_objs;
4705 
4706 static void
4707 mos_obj_refd(uint64_t obj)
4708 {
4709 	if (obj != 0 && mos_refd_objs != NULL)
4710 		range_tree_add(mos_refd_objs, obj, 1);
4711 }
4712 
4713 static void
4714 mos_leak_vdev(vdev_t *vd)
4715 {
4716 	mos_obj_refd(vd->vdev_dtl_object);
4717 	mos_obj_refd(vd->vdev_ms_array);
4718 	mos_obj_refd(vd->vdev_top_zap);
4719 	mos_obj_refd(vd->vdev_indirect_config.vic_births_object);
4720 	mos_obj_refd(vd->vdev_indirect_config.vic_mapping_object);
4721 	mos_obj_refd(vd->vdev_leaf_zap);
4722 	if (vd->vdev_checkpoint_sm != NULL)
4723 		mos_obj_refd(vd->vdev_checkpoint_sm->sm_object);
4724 	if (vd->vdev_indirect_mapping != NULL) {
4725 		mos_obj_refd(vd->vdev_indirect_mapping->
4726 		    vim_phys->vimp_counts_object);
4727 	}
4728 	if (vd->vdev_obsolete_sm != NULL)
4729 		mos_obj_refd(vd->vdev_obsolete_sm->sm_object);
4730 
4731 	for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
4732 		metaslab_t *ms = vd->vdev_ms[m];
4733 		mos_obj_refd(space_map_object(ms->ms_sm));
4734 	}
4735 
4736 	for (uint64_t c = 0; c < vd->vdev_children; c++) {
4737 		mos_leak_vdev(vd->vdev_child[c]);
4738 	}
4739 }
4740 
4741 static int
4742 dump_mos_leaks(spa_t *spa)
4743 {
4744 	int rv = 0;
4745 	objset_t *mos = spa->spa_meta_objset;
4746 	dsl_pool_t *dp = spa->spa_dsl_pool;
4747 
4748 	/* Visit and mark all referenced objects in the MOS */
4749 
4750 	mos_obj_refd(DMU_POOL_DIRECTORY_OBJECT);
4751 	mos_obj_refd(spa->spa_pool_props_object);
4752 	mos_obj_refd(spa->spa_config_object);
4753 	mos_obj_refd(spa->spa_ddt_stat_object);
4754 	mos_obj_refd(spa->spa_feat_desc_obj);
4755 	mos_obj_refd(spa->spa_feat_enabled_txg_obj);
4756 	mos_obj_refd(spa->spa_feat_for_read_obj);
4757 	mos_obj_refd(spa->spa_feat_for_write_obj);
4758 	mos_obj_refd(spa->spa_history);
4759 	mos_obj_refd(spa->spa_errlog_last);
4760 	mos_obj_refd(spa->spa_errlog_scrub);
4761 	mos_obj_refd(spa->spa_all_vdev_zaps);
4762 	mos_obj_refd(spa->spa_dsl_pool->dp_bptree_obj);
4763 	mos_obj_refd(spa->spa_dsl_pool->dp_tmp_userrefs_obj);
4764 	mos_obj_refd(spa->spa_dsl_pool->dp_scan->scn_phys.scn_queue_obj);
4765 	bpobj_count_refd(&spa->spa_deferred_bpobj);
4766 	mos_obj_refd(dp->dp_empty_bpobj);
4767 	bpobj_count_refd(&dp->dp_obsolete_bpobj);
4768 	bpobj_count_refd(&dp->dp_free_bpobj);
4769 	mos_obj_refd(spa->spa_l2cache.sav_object);
4770 	mos_obj_refd(spa->spa_spares.sav_object);
4771 
4772 	mos_obj_refd(spa->spa_condensing_indirect_phys.
4773 	    scip_next_mapping_object);
4774 	mos_obj_refd(spa->spa_condensing_indirect_phys.
4775 	    scip_prev_obsolete_sm_object);
4776 	if (spa->spa_condensing_indirect_phys.scip_next_mapping_object != 0) {
4777 		vdev_indirect_mapping_t *vim =
4778 		    vdev_indirect_mapping_open(mos,
4779 		    spa->spa_condensing_indirect_phys.scip_next_mapping_object);
4780 		mos_obj_refd(vim->vim_phys->vimp_counts_object);
4781 		vdev_indirect_mapping_close(vim);
4782 	}
4783 
4784 	if (dp->dp_origin_snap != NULL) {
4785 		dsl_dataset_t *ds;
4786 
4787 		dsl_pool_config_enter(dp, FTAG);
4788 		VERIFY0(dsl_dataset_hold_obj(dp,
4789 		    dsl_dataset_phys(dp->dp_origin_snap)->ds_next_snap_obj,
4790 		    FTAG, &ds));
4791 		count_ds_mos_objects(ds);
4792 		dump_deadlist(&ds->ds_deadlist);
4793 		dsl_dataset_rele(ds, FTAG);
4794 		dsl_pool_config_exit(dp, FTAG);
4795 
4796 		count_ds_mos_objects(dp->dp_origin_snap);
4797 		dump_deadlist(&dp->dp_origin_snap->ds_deadlist);
4798 	}
4799 	count_dir_mos_objects(dp->dp_mos_dir);
4800 	if (dp->dp_free_dir != NULL)
4801 		count_dir_mos_objects(dp->dp_free_dir);
4802 	if (dp->dp_leak_dir != NULL)
4803 		count_dir_mos_objects(dp->dp_leak_dir);
4804 
4805 	mos_leak_vdev(spa->spa_root_vdev);
4806 
4807 	for (uint64_t class = 0; class < DDT_CLASSES; class++) {
4808 		for (uint64_t type = 0; type < DDT_TYPES; type++) {
4809 			for (uint64_t cksum = 0;
4810 			    cksum < ZIO_CHECKSUM_FUNCTIONS; cksum++) {
4811 				ddt_t *ddt = spa->spa_ddt[cksum];
4812 				mos_obj_refd(ddt->ddt_object[type][class]);
4813 			}
4814 		}
4815 	}
4816 
4817 	/*
4818 	 * Visit all allocated objects and make sure they are referenced.
4819 	 */
4820 	uint64_t object = 0;
4821 	while (dmu_object_next(mos, &object, B_FALSE, 0) == 0) {
4822 		if (range_tree_contains(mos_refd_objs, object, 1)) {
4823 			range_tree_remove(mos_refd_objs, object, 1);
4824 		} else {
4825 			dmu_object_info_t doi;
4826 			const char *name;
4827 			dmu_object_info(mos, object, &doi);
4828 			if (doi.doi_type & DMU_OT_NEWTYPE) {
4829 				dmu_object_byteswap_t bswap =
4830 				    DMU_OT_BYTESWAP(doi.doi_type);
4831 				name = dmu_ot_byteswap[bswap].ob_name;
4832 			} else {
4833 				name = dmu_ot[doi.doi_type].ot_name;
4834 			}
4835 
4836 			(void) printf("MOS object %llu (%s) leaked\n",
4837 			    (u_longlong_t)object, name);
4838 			rv = 2;
4839 		}
4840 	}
4841 	(void) range_tree_walk(mos_refd_objs, mos_leaks_cb, NULL);
4842 	if (!range_tree_is_empty(mos_refd_objs))
4843 		rv = 2;
4844 	range_tree_vacate(mos_refd_objs, NULL, NULL);
4845 	range_tree_destroy(mos_refd_objs);
4846 	return (rv);
4847 }
4848 
4849 static void
4850 dump_zpool(spa_t *spa)
4851 {
4852 	dsl_pool_t *dp = spa_get_dsl(spa);
4853 	int rc = 0;
4854 
4855 	if (dump_opt['S']) {
4856 		dump_simulated_ddt(spa);
4857 		return;
4858 	}
4859 
4860 	if (!dump_opt['e'] && dump_opt['C'] > 1) {
4861 		(void) printf("\nCached configuration:\n");
4862 		dump_nvlist(spa->spa_config, 8);
4863 	}
4864 
4865 	if (dump_opt['C'])
4866 		dump_config(spa);
4867 
4868 	if (dump_opt['u'])
4869 		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
4870 
4871 	if (dump_opt['D'])
4872 		dump_all_ddts(spa);
4873 
4874 	if (dump_opt['d'] > 2 || dump_opt['m'])
4875 		dump_metaslabs(spa);
4876 	if (dump_opt['M'])
4877 		dump_metaslab_groups(spa);
4878 
4879 	if (dump_opt['d'] || dump_opt['i']) {
4880 		mos_refd_objs = range_tree_create(NULL, NULL);
4881 		dump_dir(dp->dp_meta_objset);
4882 
4883 		if (dump_opt['d'] >= 3) {
4884 			dsl_pool_t *dp = spa->spa_dsl_pool;
4885 			dump_full_bpobj(&spa->spa_deferred_bpobj,
4886 			    "Deferred frees", 0);
4887 			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
4888 				dump_full_bpobj(&dp->dp_free_bpobj,
4889 				    "Pool snapshot frees", 0);
4890 			}
4891 			if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
4892 				ASSERT(spa_feature_is_enabled(spa,
4893 				    SPA_FEATURE_DEVICE_REMOVAL));
4894 				dump_full_bpobj(&dp->dp_obsolete_bpobj,
4895 				    "Pool obsolete blocks", 0);
4896 			}
4897 
4898 			if (spa_feature_is_active(spa,
4899 			    SPA_FEATURE_ASYNC_DESTROY)) {
4900 				dump_bptree(spa->spa_meta_objset,
4901 				    dp->dp_bptree_obj,
4902 				    "Pool dataset frees");
4903 			}
4904 			dump_dtl(spa->spa_root_vdev, 0);
4905 		}
4906 		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
4907 		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
4908 
4909 		if (rc == 0 && !dump_opt['L'])
4910 			rc = dump_mos_leaks(spa);
4911 
4912 		for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
4913 			uint64_t refcount;
4914 
4915 			if (!(spa_feature_table[f].fi_flags &
4916 			    ZFEATURE_FLAG_PER_DATASET) ||
4917 			    !spa_feature_is_enabled(spa, f)) {
4918 				ASSERT0(dataset_feature_count[f]);
4919 				continue;
4920 			}
4921 			(void) feature_get_refcount(spa,
4922 			    &spa_feature_table[f], &refcount);
4923 			if (dataset_feature_count[f] != refcount) {
4924 				(void) printf("%s feature refcount mismatch: "
4925 				    "%lld datasets != %lld refcount\n",
4926 				    spa_feature_table[f].fi_uname,
4927 				    (longlong_t)dataset_feature_count[f],
4928 				    (longlong_t)refcount);
4929 				rc = 2;
4930 			} else {
4931 				(void) printf("Verified %s feature refcount "
4932 				    "of %llu is correct\n",
4933 				    spa_feature_table[f].fi_uname,
4934 				    (longlong_t)refcount);
4935 			}
4936 		}
4937 
4938 		if (rc == 0) {
4939 			rc = verify_device_removal_feature_counts(spa);
4940 		}
4941 	}
4942 
4943 	if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
4944 		rc = dump_block_stats(spa);
4945 
4946 	if (rc == 0)
4947 		rc = verify_spacemap_refcounts(spa);
4948 
4949 	if (dump_opt['s'])
4950 		show_pool_stats(spa);
4951 
4952 	if (dump_opt['h'])
4953 		dump_history(spa);
4954 
4955 	if (rc == 0)
4956 		rc = verify_checkpoint(spa);
4957 
4958 	if (rc != 0) {
4959 		dump_debug_buffer();
4960 		exit(rc);
4961 	}
4962 }
4963 
4964 #define	ZDB_FLAG_CHECKSUM	0x0001
4965 #define	ZDB_FLAG_DECOMPRESS	0x0002
4966 #define	ZDB_FLAG_BSWAP		0x0004
4967 #define	ZDB_FLAG_GBH		0x0008
4968 #define	ZDB_FLAG_INDIRECT	0x0010
4969 #define	ZDB_FLAG_PHYS		0x0020
4970 #define	ZDB_FLAG_RAW		0x0040
4971 #define	ZDB_FLAG_PRINT_BLKPTR	0x0080
4972 
4973 static int flagbits[256];
4974 
4975 static void
4976 zdb_print_blkptr(blkptr_t *bp, int flags)
4977 {
4978 	char blkbuf[BP_SPRINTF_LEN];
4979 
4980 	if (flags & ZDB_FLAG_BSWAP)
4981 		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
4982 
4983 	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
4984 	(void) printf("%s\n", blkbuf);
4985 }
4986 
4987 static void
4988 zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
4989 {
4990 	int i;
4991 
4992 	for (i = 0; i < nbps; i++)
4993 		zdb_print_blkptr(&bp[i], flags);
4994 }
4995 
4996 static void
4997 zdb_dump_gbh(void *buf, int flags)
4998 {
4999 	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
5000 }
5001 
5002 static void
5003 zdb_dump_block_raw(void *buf, uint64_t size, int flags)
5004 {
5005 	if (flags & ZDB_FLAG_BSWAP)
5006 		byteswap_uint64_array(buf, size);
5007 	(void) write(1, buf, size);
5008 }
5009 
5010 static void
5011 zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
5012 {
5013 	uint64_t *d = (uint64_t *)buf;
5014 	unsigned nwords = size / sizeof (uint64_t);
5015 	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
5016 	unsigned i, j;
5017 	const char *hdr;
5018 	char *c;
5019 
5020 
5021 	if (do_bswap)
5022 		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
5023 	else
5024 		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
5025 
5026 	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
5027 
5028 	for (i = 0; i < nwords; i += 2) {
5029 		(void) printf("%06llx:  %016llx  %016llx  ",
5030 		    (u_longlong_t)(i * sizeof (uint64_t)),
5031 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
5032 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
5033 
5034 		c = (char *)&d[i];
5035 		for (j = 0; j < 2 * sizeof (uint64_t); j++)
5036 			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
5037 		(void) printf("\n");
5038 	}
5039 }
5040 
5041 /*
5042  * There are two acceptable formats:
5043  *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
5044  *	child[.child]*    - For example: 0.1.1
5045  *
5046  * The second form can be used to specify arbitrary vdevs anywhere
5047  * in the heirarchy.  For example, in a pool with a mirror of
5048  * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
5049  */
5050 static vdev_t *
5051 zdb_vdev_lookup(vdev_t *vdev, const char *path)
5052 {
5053 	char *s, *p, *q;
5054 	unsigned i;
5055 
5056 	if (vdev == NULL)
5057 		return (NULL);
5058 
5059 	/* First, assume the x.x.x.x format */
5060 	i = strtoul(path, &s, 10);
5061 	if (s == path || (s && *s != '.' && *s != '\0'))
5062 		goto name;
5063 	if (i >= vdev->vdev_children)
5064 		return (NULL);
5065 
5066 	vdev = vdev->vdev_child[i];
5067 	if (*s == '\0')
5068 		return (vdev);
5069 	return (zdb_vdev_lookup(vdev, s+1));
5070 
5071 name:
5072 	for (i = 0; i < vdev->vdev_children; i++) {
5073 		vdev_t *vc = vdev->vdev_child[i];
5074 
5075 		if (vc->vdev_path == NULL) {
5076 			vc = zdb_vdev_lookup(vc, path);
5077 			if (vc == NULL)
5078 				continue;
5079 			else
5080 				return (vc);
5081 		}
5082 
5083 		p = strrchr(vc->vdev_path, '/');
5084 		p = p ? p + 1 : vc->vdev_path;
5085 		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
5086 
5087 		if (strcmp(vc->vdev_path, path) == 0)
5088 			return (vc);
5089 		if (strcmp(p, path) == 0)
5090 			return (vc);
5091 		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
5092 			return (vc);
5093 	}
5094 
5095 	return (NULL);
5096 }
5097 
5098 /* ARGSUSED */
5099 static int
5100 random_get_pseudo_bytes_cb(void *buf, size_t len, void *unused)
5101 {
5102 	return (random_get_pseudo_bytes(buf, len));
5103 }
5104 
5105 /*
5106  * Read a block from a pool and print it out.  The syntax of the
5107  * block descriptor is:
5108  *
5109  *	pool:vdev_specifier:offset:size[:flags]
5110  *
5111  *	pool           - The name of the pool you wish to read from
5112  *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
5113  *	offset         - offset, in hex, in bytes
5114  *	size           - Amount of data to read, in hex, in bytes
5115  *	flags          - A string of characters specifying options
5116  *		 b: Decode a blkptr at given offset within block
5117  *		*c: Calculate and display checksums
5118  *		 d: Decompress data before dumping
5119  *		 e: Byteswap data before dumping
5120  *		 g: Display data as a gang block header
5121  *		 i: Display as an indirect block
5122  *		 p: Do I/O to physical offset
5123  *		 r: Dump raw data to stdout
5124  *
5125  *              * = not yet implemented
5126  */
5127 static void
5128 zdb_read_block(char *thing, spa_t *spa)
5129 {
5130 	blkptr_t blk, *bp = &blk;
5131 	dva_t *dva = bp->blk_dva;
5132 	int flags = 0;
5133 	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
5134 	zio_t *zio;
5135 	vdev_t *vd;
5136 	abd_t *pabd;
5137 	void *lbuf, *buf;
5138 	const char *s, *vdev;
5139 	char *p, *dup, *flagstr;
5140 	int i, error;
5141 
5142 	dup = strdup(thing);
5143 	s = strtok(dup, ":");
5144 	vdev = s ? s : "";
5145 	s = strtok(NULL, ":");
5146 	offset = strtoull(s ? s : "", NULL, 16);
5147 	s = strtok(NULL, ":");
5148 	size = strtoull(s ? s : "", NULL, 16);
5149 	s = strtok(NULL, ":");
5150 	if (s)
5151 		flagstr = strdup(s);
5152 	else
5153 		flagstr = strdup("");
5154 
5155 	s = NULL;
5156 	if (size == 0)
5157 		s = "size must not be zero";
5158 	if (!IS_P2ALIGNED(size, DEV_BSIZE))
5159 		s = "size must be a multiple of sector size";
5160 	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
5161 		s = "offset must be a multiple of sector size";
5162 	if (s) {
5163 		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
5164 		free(dup);
5165 		return;
5166 	}
5167 
5168 	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
5169 		for (i = 0; flagstr[i]; i++) {
5170 			int bit = flagbits[(uchar_t)flagstr[i]];
5171 
5172 			if (bit == 0) {
5173 				(void) printf("***Invalid flag: %c\n",
5174 				    flagstr[i]);
5175 				continue;
5176 			}
5177 			flags |= bit;
5178 
5179 			/* If it's not something with an argument, keep going */
5180 			if ((bit & (ZDB_FLAG_CHECKSUM |
5181 			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
5182 				continue;
5183 
5184 			p = &flagstr[i + 1];
5185 			if (bit == ZDB_FLAG_PRINT_BLKPTR)
5186 				blkptr_offset = strtoull(p, &p, 16);
5187 			if (*p != ':' && *p != '\0') {
5188 				(void) printf("***Invalid flag arg: '%s'\n", s);
5189 				free(dup);
5190 				return;
5191 			}
5192 		}
5193 	}
5194 	free(flagstr);
5195 
5196 	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
5197 	if (vd == NULL) {
5198 		(void) printf("***Invalid vdev: %s\n", vdev);
5199 		free(dup);
5200 		return;
5201 	} else {
5202 		if (vd->vdev_path)
5203 			(void) fprintf(stderr, "Found vdev: %s\n",
5204 			    vd->vdev_path);
5205 		else
5206 			(void) fprintf(stderr, "Found vdev type: %s\n",
5207 			    vd->vdev_ops->vdev_op_type);
5208 	}
5209 
5210 	psize = size;
5211 	lsize = size;
5212 
5213 	pabd = abd_alloc_linear(SPA_MAXBLOCKSIZE, B_FALSE);
5214 	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5215 
5216 	BP_ZERO(bp);
5217 
5218 	DVA_SET_VDEV(&dva[0], vd->vdev_id);
5219 	DVA_SET_OFFSET(&dva[0], offset);
5220 	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
5221 	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
5222 
5223 	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
5224 
5225 	BP_SET_LSIZE(bp, lsize);
5226 	BP_SET_PSIZE(bp, psize);
5227 	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
5228 	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
5229 	BP_SET_TYPE(bp, DMU_OT_NONE);
5230 	BP_SET_LEVEL(bp, 0);
5231 	BP_SET_DEDUP(bp, 0);
5232 	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
5233 
5234 	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
5235 	zio = zio_root(spa, NULL, NULL, 0);
5236 
5237 	if (vd == vd->vdev_top) {
5238 		/*
5239 		 * Treat this as a normal block read.
5240 		 */
5241 		zio_nowait(zio_read(zio, spa, bp, pabd, psize, NULL, NULL,
5242 		    ZIO_PRIORITY_SYNC_READ,
5243 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
5244 	} else {
5245 		/*
5246 		 * Treat this as a vdev child I/O.
5247 		 */
5248 		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pabd,
5249 		    psize, ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
5250 		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
5251 		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
5252 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | ZIO_FLAG_OPTIONAL,
5253 		    NULL, NULL));
5254 	}
5255 
5256 	error = zio_wait(zio);
5257 	spa_config_exit(spa, SCL_STATE, FTAG);
5258 
5259 	if (error) {
5260 		(void) printf("Read of %s failed, error: %d\n", thing, error);
5261 		goto out;
5262 	}
5263 
5264 	if (flags & ZDB_FLAG_DECOMPRESS) {
5265 		/*
5266 		 * We don't know how the data was compressed, so just try
5267 		 * every decompress function at every inflated blocksize.
5268 		 */
5269 		enum zio_compress c;
5270 		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5271 		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5272 
5273 		abd_copy_to_buf(pbuf2, pabd, psize);
5274 
5275 		VERIFY0(abd_iterate_func(pabd, psize, SPA_MAXBLOCKSIZE - psize,
5276 		    random_get_pseudo_bytes_cb, NULL));
5277 
5278 		VERIFY0(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
5279 		    SPA_MAXBLOCKSIZE - psize));
5280 
5281 		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
5282 		    lsize -= SPA_MINBLOCKSIZE) {
5283 			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
5284 				if (zio_decompress_data(c, pabd,
5285 				    lbuf, psize, lsize) == 0 &&
5286 				    zio_decompress_data_buf(c, pbuf2,
5287 				    lbuf2, psize, lsize) == 0 &&
5288 				    bcmp(lbuf, lbuf2, lsize) == 0)
5289 					break;
5290 			}
5291 			if (c != ZIO_COMPRESS_FUNCTIONS)
5292 				break;
5293 			lsize -= SPA_MINBLOCKSIZE;
5294 		}
5295 
5296 		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
5297 		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
5298 
5299 		if (lsize <= psize) {
5300 			(void) printf("Decompress of %s failed\n", thing);
5301 			goto out;
5302 		}
5303 		buf = lbuf;
5304 		size = lsize;
5305 	} else {
5306 		buf = abd_to_buf(pabd);
5307 		size = psize;
5308 	}
5309 
5310 	if (flags & ZDB_FLAG_PRINT_BLKPTR)
5311 		zdb_print_blkptr((blkptr_t *)(void *)
5312 		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
5313 	else if (flags & ZDB_FLAG_RAW)
5314 		zdb_dump_block_raw(buf, size, flags);
5315 	else if (flags & ZDB_FLAG_INDIRECT)
5316 		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
5317 		    flags);
5318 	else if (flags & ZDB_FLAG_GBH)
5319 		zdb_dump_gbh(buf, flags);
5320 	else
5321 		zdb_dump_block(thing, buf, size, flags);
5322 
5323 out:
5324 	abd_free(pabd);
5325 	umem_free(lbuf, SPA_MAXBLOCKSIZE);
5326 	free(dup);
5327 }
5328 
5329 static void
5330 zdb_embedded_block(char *thing)
5331 {
5332 	blkptr_t bp;
5333 	unsigned long long *words = (void *)&bp;
5334 	char *buf;
5335 	int err;
5336 
5337 	bzero(&bp, sizeof (bp));
5338 	err = sscanf(thing, "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx:"
5339 	    "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx",
5340 	    words + 0, words + 1, words + 2, words + 3,
5341 	    words + 4, words + 5, words + 6, words + 7,
5342 	    words + 8, words + 9, words + 10, words + 11,
5343 	    words + 12, words + 13, words + 14, words + 15);
5344 	if (err != 16) {
5345 		(void) fprintf(stderr, "invalid input format\n");
5346 		exit(1);
5347 	}
5348 	ASSERT3U(BPE_GET_LSIZE(&bp), <=, SPA_MAXBLOCKSIZE);
5349 	buf = malloc(SPA_MAXBLOCKSIZE);
5350 	if (buf == NULL) {
5351 		(void) fprintf(stderr, "out of memory\n");
5352 		exit(1);
5353 	}
5354 	err = decode_embedded_bp(&bp, buf, BPE_GET_LSIZE(&bp));
5355 	if (err != 0) {
5356 		(void) fprintf(stderr, "decode failed: %u\n", err);
5357 		exit(1);
5358 	}
5359 	zdb_dump_block_raw(buf, BPE_GET_LSIZE(&bp), 0);
5360 	free(buf);
5361 }
5362 
5363 int
5364 main(int argc, char **argv)
5365 {
5366 	int c;
5367 	struct rlimit rl = { 1024, 1024 };
5368 	spa_t *spa = NULL;
5369 	objset_t *os = NULL;
5370 	int dump_all = 1;
5371 	int verbose = 0;
5372 	int error = 0;
5373 	char **searchdirs = NULL;
5374 	int nsearch = 0;
5375 	char *target, *target_pool;
5376 	nvlist_t *policy = NULL;
5377 	uint64_t max_txg = UINT64_MAX;
5378 	int flags = ZFS_IMPORT_MISSING_LOG;
5379 	int rewind = ZPOOL_NEVER_REWIND;
5380 	char *spa_config_path_env;
5381 	boolean_t target_is_spa = B_TRUE;
5382 	nvlist_t *cfg = NULL;
5383 
5384 	(void) setrlimit(RLIMIT_NOFILE, &rl);
5385 	(void) enable_extended_FILE_stdio(-1, -1);
5386 
5387 	dprintf_setup(&argc, argv);
5388 
5389 	/*
5390 	 * If there is an environment variable SPA_CONFIG_PATH it overrides
5391 	 * default spa_config_path setting. If -U flag is specified it will
5392 	 * override this environment variable settings once again.
5393 	 */
5394 	spa_config_path_env = getenv("SPA_CONFIG_PATH");
5395 	if (spa_config_path_env != NULL)
5396 		spa_config_path = spa_config_path_env;
5397 
5398 	while ((c = getopt(argc, argv,
5399 	    "AbcCdDeEFGhiI:klLmMo:Op:PqRsSt:uU:vVx:X")) != -1) {
5400 		switch (c) {
5401 		case 'b':
5402 		case 'c':
5403 		case 'C':
5404 		case 'd':
5405 		case 'D':
5406 		case 'E':
5407 		case 'G':
5408 		case 'h':
5409 		case 'i':
5410 		case 'l':
5411 		case 'm':
5412 		case 'M':
5413 		case 'O':
5414 		case 'R':
5415 		case 's':
5416 		case 'S':
5417 		case 'u':
5418 			dump_opt[c]++;
5419 			dump_all = 0;
5420 			break;
5421 		case 'A':
5422 		case 'e':
5423 		case 'F':
5424 		case 'k':
5425 		case 'L':
5426 		case 'P':
5427 		case 'q':
5428 		case 'X':
5429 			dump_opt[c]++;
5430 			break;
5431 		/* NB: Sort single match options below. */
5432 		case 'I':
5433 			max_inflight = strtoull(optarg, NULL, 0);
5434 			if (max_inflight == 0) {
5435 				(void) fprintf(stderr, "maximum number "
5436 				    "of inflight I/Os must be greater "
5437 				    "than 0\n");
5438 				usage();
5439 			}
5440 			break;
5441 		case 'o':
5442 			error = set_global_var(optarg);
5443 			if (error != 0)
5444 				usage();
5445 			break;
5446 		case 'p':
5447 			if (searchdirs == NULL) {
5448 				searchdirs = umem_alloc(sizeof (char *),
5449 				    UMEM_NOFAIL);
5450 			} else {
5451 				char **tmp = umem_alloc((nsearch + 1) *
5452 				    sizeof (char *), UMEM_NOFAIL);
5453 				bcopy(searchdirs, tmp, nsearch *
5454 				    sizeof (char *));
5455 				umem_free(searchdirs,
5456 				    nsearch * sizeof (char *));
5457 				searchdirs = tmp;
5458 			}
5459 			searchdirs[nsearch++] = optarg;
5460 			break;
5461 		case 't':
5462 			max_txg = strtoull(optarg, NULL, 0);
5463 			if (max_txg < TXG_INITIAL) {
5464 				(void) fprintf(stderr, "incorrect txg "
5465 				    "specified: %s\n", optarg);
5466 				usage();
5467 			}
5468 			break;
5469 		case 'U':
5470 			spa_config_path = optarg;
5471 			if (spa_config_path[0] != '/') {
5472 				(void) fprintf(stderr,
5473 				    "cachefile must be an absolute path "
5474 				    "(i.e. start with a slash)\n");
5475 				usage();
5476 			}
5477 			break;
5478 		case 'v':
5479 			verbose++;
5480 			break;
5481 		case 'V':
5482 			flags = ZFS_IMPORT_VERBATIM;
5483 			break;
5484 		case 'x':
5485 			vn_dumpdir = optarg;
5486 			break;
5487 		default:
5488 			usage();
5489 			break;
5490 		}
5491 	}
5492 
5493 	if (!dump_opt['e'] && searchdirs != NULL) {
5494 		(void) fprintf(stderr, "-p option requires use of -e\n");
5495 		usage();
5496 	}
5497 
5498 	/*
5499 	 * ZDB does not typically re-read blocks; therefore limit the ARC
5500 	 * to 256 MB, which can be used entirely for metadata.
5501 	 */
5502 	zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
5503 
5504 	/*
5505 	 * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
5506 	 * "zdb -b" uses traversal prefetch which uses async reads.
5507 	 * For good performance, let several of them be active at once.
5508 	 */
5509 	zfs_vdev_async_read_max_active = 10;
5510 
5511 	/*
5512 	 * Disable reference tracking for better performance.
5513 	 */
5514 	reference_tracking_enable = B_FALSE;
5515 
5516 	/*
5517 	 * Do not fail spa_load when spa_load_verify fails. This is needed
5518 	 * to load non-idle pools.
5519 	 */
5520 	spa_load_verify_dryrun = B_TRUE;
5521 
5522 	kernel_init(FREAD);
5523 	g_zfs = libzfs_init();
5524 	ASSERT(g_zfs != NULL);
5525 
5526 	if (dump_all)
5527 		verbose = MAX(verbose, 1);
5528 
5529 	for (c = 0; c < 256; c++) {
5530 		if (dump_all && strchr("AeEFklLOPRSX", c) == NULL)
5531 			dump_opt[c] = 1;
5532 		if (dump_opt[c])
5533 			dump_opt[c] += verbose;
5534 	}
5535 
5536 	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
5537 	zfs_recover = (dump_opt['A'] > 1);
5538 
5539 	argc -= optind;
5540 	argv += optind;
5541 
5542 	if (argc < 2 && dump_opt['R'])
5543 		usage();
5544 
5545 	if (dump_opt['E']) {
5546 		if (argc != 1)
5547 			usage();
5548 		zdb_embedded_block(argv[0]);
5549 		return (0);
5550 	}
5551 
5552 	if (argc < 1) {
5553 		if (!dump_opt['e'] && dump_opt['C']) {
5554 			dump_cachefile(spa_config_path);
5555 			return (0);
5556 		}
5557 		usage();
5558 	}
5559 
5560 	if (dump_opt['l'])
5561 		return (dump_label(argv[0]));
5562 
5563 	if (dump_opt['O']) {
5564 		if (argc != 2)
5565 			usage();
5566 		dump_opt['v'] = verbose + 3;
5567 		return (dump_path(argv[0], argv[1]));
5568 	}
5569 
5570 	if (dump_opt['X'] || dump_opt['F'])
5571 		rewind = ZPOOL_DO_REWIND |
5572 		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
5573 
5574 	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
5575 	    nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, max_txg) != 0 ||
5576 	    nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY, rewind) != 0)
5577 		fatal("internal error: %s", strerror(ENOMEM));
5578 
5579 	error = 0;
5580 	target = argv[0];
5581 
5582 	if (strpbrk(target, "/@") != NULL) {
5583 		size_t targetlen;
5584 
5585 		target_pool = strdup(target);
5586 		*strpbrk(target_pool, "/@") = '\0';
5587 
5588 		target_is_spa = B_FALSE;
5589 		targetlen = strlen(target);
5590 		if (targetlen && target[targetlen - 1] == '/')
5591 			target[targetlen - 1] = '\0';
5592 	} else {
5593 		target_pool = target;
5594 	}
5595 
5596 	if (dump_opt['e']) {
5597 		importargs_t args = { 0 };
5598 
5599 		args.paths = nsearch;
5600 		args.path = searchdirs;
5601 		args.can_be_active = B_TRUE;
5602 
5603 		error = zpool_tryimport(g_zfs, target_pool, &cfg, &args);
5604 
5605 		if (error == 0) {
5606 
5607 			if (nvlist_add_nvlist(cfg,
5608 			    ZPOOL_LOAD_POLICY, policy) != 0) {
5609 				fatal("can't open '%s': %s",
5610 				    target, strerror(ENOMEM));
5611 			}
5612 
5613 			if (dump_opt['C'] > 1) {
5614 				(void) printf("\nConfiguration for import:\n");
5615 				dump_nvlist(cfg, 8);
5616 			}
5617 
5618 			/*
5619 			 * Disable the activity check to allow examination of
5620 			 * active pools.
5621 			 */
5622 			error = spa_import(target_pool, cfg, NULL,
5623 			    flags | ZFS_IMPORT_SKIP_MMP);
5624 		}
5625 	}
5626 
5627 	char *checkpoint_pool = NULL;
5628 	char *checkpoint_target = NULL;
5629 	if (dump_opt['k']) {
5630 		checkpoint_pool = import_checkpointed_state(target, cfg,
5631 		    &checkpoint_target);
5632 
5633 		if (checkpoint_target != NULL)
5634 			target = checkpoint_target;
5635 
5636 	}
5637 
5638 	if (error == 0) {
5639 		if (dump_opt['k'] && (target_is_spa || dump_opt['R'])) {
5640 			ASSERT(checkpoint_pool != NULL);
5641 			ASSERT(checkpoint_target == NULL);
5642 
5643 			error = spa_open(checkpoint_pool, &spa, FTAG);
5644 			if (error != 0) {
5645 				fatal("Tried to open pool \"%s\" but "
5646 				    "spa_open() failed with error %d\n",
5647 				    checkpoint_pool, error);
5648 			}
5649 
5650 		} else if (target_is_spa || dump_opt['R']) {
5651 			zdb_set_skip_mmp(target);
5652 			error = spa_open_rewind(target, &spa, FTAG, policy,
5653 			    NULL);
5654 			if (error) {
5655 				/*
5656 				 * If we're missing the log device then
5657 				 * try opening the pool after clearing the
5658 				 * log state.
5659 				 */
5660 				mutex_enter(&spa_namespace_lock);
5661 				if ((spa = spa_lookup(target)) != NULL &&
5662 				    spa->spa_log_state == SPA_LOG_MISSING) {
5663 					spa->spa_log_state = SPA_LOG_CLEAR;
5664 					error = 0;
5665 				}
5666 				mutex_exit(&spa_namespace_lock);
5667 
5668 				if (!error) {
5669 					error = spa_open_rewind(target, &spa,
5670 					    FTAG, policy, NULL);
5671 				}
5672 			}
5673 		} else {
5674 			zdb_set_skip_mmp(target);
5675 			error = open_objset(target, DMU_OST_ANY, FTAG, &os);
5676 		}
5677 	}
5678 	nvlist_free(policy);
5679 
5680 	if (error)
5681 		fatal("can't open '%s': %s", target, strerror(error));
5682 
5683 	argv++;
5684 	argc--;
5685 	if (!dump_opt['R']) {
5686 		if (argc > 0) {
5687 			zopt_objects = argc;
5688 			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
5689 			for (unsigned i = 0; i < zopt_objects; i++) {
5690 				errno = 0;
5691 				zopt_object[i] = strtoull(argv[i], NULL, 0);
5692 				if (zopt_object[i] == 0 && errno != 0)
5693 					fatal("bad number %s: %s",
5694 					    argv[i], strerror(errno));
5695 			}
5696 		}
5697 		if (os != NULL) {
5698 			dump_dir(os);
5699 		} else if (zopt_objects > 0 && !dump_opt['m']) {
5700 			dump_dir(spa->spa_meta_objset);
5701 		} else {
5702 			dump_zpool(spa);
5703 		}
5704 	} else {
5705 		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
5706 		flagbits['c'] = ZDB_FLAG_CHECKSUM;
5707 		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
5708 		flagbits['e'] = ZDB_FLAG_BSWAP;
5709 		flagbits['g'] = ZDB_FLAG_GBH;
5710 		flagbits['i'] = ZDB_FLAG_INDIRECT;
5711 		flagbits['p'] = ZDB_FLAG_PHYS;
5712 		flagbits['r'] = ZDB_FLAG_RAW;
5713 
5714 		for (int i = 0; i < argc; i++)
5715 			zdb_read_block(argv[i], spa);
5716 	}
5717 
5718 	if (dump_opt['k']) {
5719 		free(checkpoint_pool);
5720 		if (!target_is_spa)
5721 			free(checkpoint_target);
5722 	}
5723 
5724 	if (os != NULL)
5725 		close_objset(os, FTAG);
5726 	else
5727 		spa_close(spa, FTAG);
5728 
5729 	fuid_table_destroy();
5730 
5731 	dump_debug_buffer();
5732 
5733 	libzfs_fini(g_zfs);
5734 	kernel_fini();
5735 
5736 	return (error);
5737 }
5738