xref: /illumos-gate/usr/src/cmd/zdb/zdb.c (revision 555d674d5d4b8191dc83723188349d28278b2431)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
25  * Copyright (c) 2014 Integros [integros.com]
26  * Copyright 2017 Nexenta Systems, Inc.
27  * Copyright (c) 2017, 2018 Lawrence Livermore National Security, LLC.
28  * Copyright 2017 RackTop Systems.
29  */
30 
31 #include <stdio.h>
32 #include <unistd.h>
33 #include <stdio_ext.h>
34 #include <stdlib.h>
35 #include <ctype.h>
36 #include <sys/zfs_context.h>
37 #include <sys/spa.h>
38 #include <sys/spa_impl.h>
39 #include <sys/dmu.h>
40 #include <sys/zap.h>
41 #include <sys/fs/zfs.h>
42 #include <sys/zfs_znode.h>
43 #include <sys/zfs_sa.h>
44 #include <sys/sa.h>
45 #include <sys/sa_impl.h>
46 #include <sys/vdev.h>
47 #include <sys/vdev_impl.h>
48 #include <sys/metaslab_impl.h>
49 #include <sys/dmu_objset.h>
50 #include <sys/dsl_dir.h>
51 #include <sys/dsl_dataset.h>
52 #include <sys/dsl_pool.h>
53 #include <sys/dbuf.h>
54 #include <sys/zil.h>
55 #include <sys/zil_impl.h>
56 #include <sys/stat.h>
57 #include <sys/resource.h>
58 #include <sys/dmu_traverse.h>
59 #include <sys/zio_checksum.h>
60 #include <sys/zio_compress.h>
61 #include <sys/zfs_fuid.h>
62 #include <sys/arc.h>
63 #include <sys/ddt.h>
64 #include <sys/zfeature.h>
65 #include <sys/abd.h>
66 #include <sys/blkptr.h>
67 #include <sys/dsl_scan.h>
68 #include <zfs_comutil.h>
69 #include <libcmdutils.h>
70 #undef verify
71 #include <libzfs.h>
72 
73 #include "zdb.h"
74 
75 #define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
76 	zio_compress_table[(idx)].ci_name : "UNKNOWN")
77 #define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
78 	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
79 #define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
80 	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
81 	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
82 #define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
83 	(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ?	\
84 	DMU_OT_ZAP_OTHER : \
85 	(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
86 	DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
87 
88 #ifndef lint
89 extern int reference_tracking_enable;
90 extern boolean_t zfs_recover;
91 extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
92 extern int zfs_vdev_async_read_max_active;
93 extern int aok;
94 extern boolean_t spa_load_verify_dryrun;
95 #else
96 int reference_tracking_enable;
97 boolean_t zfs_recover;
98 uint64_t zfs_arc_max, zfs_arc_meta_limit;
99 int zfs_vdev_async_read_max_active;
100 int aok;
101 boolean_t spa_load_verify_dryrun;
102 #endif
103 
104 static const char cmdname[] = "zdb";
105 uint8_t dump_opt[256];
106 
107 typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
108 
109 uint64_t *zopt_object = NULL;
110 static unsigned zopt_objects = 0;
111 libzfs_handle_t *g_zfs;
112 uint64_t max_inflight = 1000;
113 static int leaked_objects = 0;
114 
115 static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
116 static void mos_obj_refd(uint64_t);
117 
118 /*
119  * These libumem hooks provide a reasonable set of defaults for the allocator's
120  * debugging facilities.
121  */
122 const char *
123 _umem_debug_init()
124 {
125 	return ("default,verbose"); /* $UMEM_DEBUG setting */
126 }
127 
128 const char *
129 _umem_logging_init(void)
130 {
131 	return ("fail,contents"); /* $UMEM_LOGGING setting */
132 }
133 
134 static void
135 usage(void)
136 {
137 	(void) fprintf(stderr,
138 	    "Usage:\t%s [-AbcdDFGhikLMPsvX] [-e [-V] [-p <path> ...]] "
139 	    "[-I <inflight I/Os>]\n"
140 	    "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
141 	    "\t\t[<poolname> [<object> ...]]\n"
142 	    "\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset> "
143 	    "[<object> ...]\n"
144 	    "\t%s -C [-A] [-U <cache>]\n"
145 	    "\t%s -l [-Aqu] <device>\n"
146 	    "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
147 	    "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
148 	    "\t%s -O <dataset> <path>\n"
149 	    "\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
150 	    "\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
151 	    "\t%s -E [-A] word0:word1:...:word15\n"
152 	    "\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
153 	    "<poolname>\n\n",
154 	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
155 	    cmdname, cmdname);
156 
157 	(void) fprintf(stderr, "    Dataset name must include at least one "
158 	    "separator character '/' or '@'\n");
159 	(void) fprintf(stderr, "    If dataset name is specified, only that "
160 	    "dataset is dumped\n");
161 	(void) fprintf(stderr, "    If object numbers are specified, only "
162 	    "those objects are dumped\n\n");
163 	(void) fprintf(stderr, "    Options to control amount of output:\n");
164 	(void) fprintf(stderr, "        -b block statistics\n");
165 	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
166 	    "all data) blocks\n");
167 	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
168 	(void) fprintf(stderr, "        -d dataset(s)\n");
169 	(void) fprintf(stderr, "        -D dedup statistics\n");
170 	(void) fprintf(stderr, "        -E decode and display block from an "
171 	    "embedded block pointer\n");
172 	(void) fprintf(stderr, "        -h pool history\n");
173 	(void) fprintf(stderr, "        -i intent logs\n");
174 	(void) fprintf(stderr, "        -l read label contents\n");
175 	(void) fprintf(stderr, "        -k examine the checkpointed state "
176 	    "of the pool\n");
177 	(void) fprintf(stderr, "        -L disable leak tracking (do not "
178 	    "load spacemaps)\n");
179 	(void) fprintf(stderr, "        -m metaslabs\n");
180 	(void) fprintf(stderr, "        -M metaslab groups\n");
181 	(void) fprintf(stderr, "        -O perform object lookups by path\n");
182 	(void) fprintf(stderr, "        -R read and display block from a "
183 	    "device\n");
184 	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
185 	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
186 	(void) fprintf(stderr, "        -v verbose (applies to all "
187 	    "others)\n\n");
188 	(void) fprintf(stderr, "    Below options are intended for use "
189 	    "with other options:\n");
190 	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
191 	    "panic recovery (-AA) or both (-AAA)\n");
192 	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
193 	    "has altroot/not in a cachefile\n");
194 	(void) fprintf(stderr, "        -F attempt automatic rewind within "
195 	    "safe range of transaction groups\n");
196 	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
197 	    "exiting\n");
198 	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
199 	    "specify the maximum number of "
200 	    "checksumming I/Os [default is 200]\n");
201 	(void) fprintf(stderr, "        -o <variable>=<value> set global "
202 	    "variable to an unsigned 32-bit integer value\n");
203 	(void) fprintf(stderr, "        -p <path> -- use one or more with "
204 	    "-e to specify path to vdev dir\n");
205 	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
206 	(void) fprintf(stderr, "        -q don't print label contents\n");
207 	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
208 	    "searching for uberblocks\n");
209 	(void) fprintf(stderr, "        -u uberblock\n");
210 	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
211 	    "cachefile\n");
212 	(void) fprintf(stderr, "        -V do verbatim import\n");
213 	(void) fprintf(stderr, "        -x <dumpdir> -- "
214 	    "dump all read blocks into specified directory\n");
215 	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
216 	    "work with dataset)\n\n");
217 	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
218 	    "to make only that option verbose\n");
219 	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
220 	exit(1);
221 }
222 
223 static void
224 dump_debug_buffer()
225 {
226 	if (dump_opt['G']) {
227 		(void) printf("\n");
228 		zfs_dbgmsg_print("zdb");
229 	}
230 }
231 
232 /*
233  * Called for usage errors that are discovered after a call to spa_open(),
234  * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
235  */
236 
237 static void
238 fatal(const char *fmt, ...)
239 {
240 	va_list ap;
241 
242 	va_start(ap, fmt);
243 	(void) fprintf(stderr, "%s: ", cmdname);
244 	(void) vfprintf(stderr, fmt, ap);
245 	va_end(ap);
246 	(void) fprintf(stderr, "\n");
247 
248 	dump_debug_buffer();
249 
250 	exit(1);
251 }
252 
253 /* ARGSUSED */
254 static void
255 dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
256 {
257 	nvlist_t *nv;
258 	size_t nvsize = *(uint64_t *)data;
259 	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
260 
261 	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
262 
263 	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
264 
265 	umem_free(packed, nvsize);
266 
267 	dump_nvlist(nv, 8);
268 
269 	nvlist_free(nv);
270 }
271 
272 /* ARGSUSED */
273 static void
274 dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
275 {
276 	spa_history_phys_t *shp = data;
277 
278 	if (shp == NULL)
279 		return;
280 
281 	(void) printf("\t\tpool_create_len = %llu\n",
282 	    (u_longlong_t)shp->sh_pool_create_len);
283 	(void) printf("\t\tphys_max_off = %llu\n",
284 	    (u_longlong_t)shp->sh_phys_max_off);
285 	(void) printf("\t\tbof = %llu\n",
286 	    (u_longlong_t)shp->sh_bof);
287 	(void) printf("\t\teof = %llu\n",
288 	    (u_longlong_t)shp->sh_eof);
289 	(void) printf("\t\trecords_lost = %llu\n",
290 	    (u_longlong_t)shp->sh_records_lost);
291 }
292 
293 static void
294 zdb_nicenum(uint64_t num, char *buf, size_t buflen)
295 {
296 	if (dump_opt['P'])
297 		(void) snprintf(buf, buflen, "%llu", (longlong_t)num);
298 	else
299 		nicenum(num, buf, sizeof (buf));
300 }
301 
302 static const char histo_stars[] = "****************************************";
303 static const uint64_t histo_width = sizeof (histo_stars) - 1;
304 
305 static void
306 dump_histogram(const uint64_t *histo, int size, int offset)
307 {
308 	int i;
309 	int minidx = size - 1;
310 	int maxidx = 0;
311 	uint64_t max = 0;
312 
313 	for (i = 0; i < size; i++) {
314 		if (histo[i] > max)
315 			max = histo[i];
316 		if (histo[i] > 0 && i > maxidx)
317 			maxidx = i;
318 		if (histo[i] > 0 && i < minidx)
319 			minidx = i;
320 	}
321 
322 	if (max < histo_width)
323 		max = histo_width;
324 
325 	for (i = minidx; i <= maxidx; i++) {
326 		(void) printf("\t\t\t%3u: %6llu %s\n",
327 		    i + offset, (u_longlong_t)histo[i],
328 		    &histo_stars[(max - histo[i]) * histo_width / max]);
329 	}
330 }
331 
332 static void
333 dump_zap_stats(objset_t *os, uint64_t object)
334 {
335 	int error;
336 	zap_stats_t zs;
337 
338 	error = zap_get_stats(os, object, &zs);
339 	if (error)
340 		return;
341 
342 	if (zs.zs_ptrtbl_len == 0) {
343 		ASSERT(zs.zs_num_blocks == 1);
344 		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
345 		    (u_longlong_t)zs.zs_blocksize,
346 		    (u_longlong_t)zs.zs_num_entries);
347 		return;
348 	}
349 
350 	(void) printf("\tFat ZAP stats:\n");
351 
352 	(void) printf("\t\tPointer table:\n");
353 	(void) printf("\t\t\t%llu elements\n",
354 	    (u_longlong_t)zs.zs_ptrtbl_len);
355 	(void) printf("\t\t\tzt_blk: %llu\n",
356 	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
357 	(void) printf("\t\t\tzt_numblks: %llu\n",
358 	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
359 	(void) printf("\t\t\tzt_shift: %llu\n",
360 	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
361 	(void) printf("\t\t\tzt_blks_copied: %llu\n",
362 	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
363 	(void) printf("\t\t\tzt_nextblk: %llu\n",
364 	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
365 
366 	(void) printf("\t\tZAP entries: %llu\n",
367 	    (u_longlong_t)zs.zs_num_entries);
368 	(void) printf("\t\tLeaf blocks: %llu\n",
369 	    (u_longlong_t)zs.zs_num_leafs);
370 	(void) printf("\t\tTotal blocks: %llu\n",
371 	    (u_longlong_t)zs.zs_num_blocks);
372 	(void) printf("\t\tzap_block_type: 0x%llx\n",
373 	    (u_longlong_t)zs.zs_block_type);
374 	(void) printf("\t\tzap_magic: 0x%llx\n",
375 	    (u_longlong_t)zs.zs_magic);
376 	(void) printf("\t\tzap_salt: 0x%llx\n",
377 	    (u_longlong_t)zs.zs_salt);
378 
379 	(void) printf("\t\tLeafs with 2^n pointers:\n");
380 	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
381 
382 	(void) printf("\t\tBlocks with n*5 entries:\n");
383 	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
384 
385 	(void) printf("\t\tBlocks n/10 full:\n");
386 	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
387 
388 	(void) printf("\t\tEntries with n chunks:\n");
389 	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
390 
391 	(void) printf("\t\tBuckets with n entries:\n");
392 	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
393 }
394 
395 /*ARGSUSED*/
396 static void
397 dump_none(objset_t *os, uint64_t object, void *data, size_t size)
398 {
399 }
400 
401 /*ARGSUSED*/
402 static void
403 dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
404 {
405 	(void) printf("\tUNKNOWN OBJECT TYPE\n");
406 }
407 
408 /*ARGSUSED*/
409 static void
410 dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
411 {
412 }
413 
414 /*ARGSUSED*/
415 static void
416 dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
417 {
418 }
419 
420 /*ARGSUSED*/
421 static void
422 dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
423 {
424 	zap_cursor_t zc;
425 	zap_attribute_t attr;
426 	void *prop;
427 	unsigned i;
428 
429 	dump_zap_stats(os, object);
430 	(void) printf("\n");
431 
432 	for (zap_cursor_init(&zc, os, object);
433 	    zap_cursor_retrieve(&zc, &attr) == 0;
434 	    zap_cursor_advance(&zc)) {
435 		(void) printf("\t\t%s = ", attr.za_name);
436 		if (attr.za_num_integers == 0) {
437 			(void) printf("\n");
438 			continue;
439 		}
440 		prop = umem_zalloc(attr.za_num_integers *
441 		    attr.za_integer_length, UMEM_NOFAIL);
442 		(void) zap_lookup(os, object, attr.za_name,
443 		    attr.za_integer_length, attr.za_num_integers, prop);
444 		if (attr.za_integer_length == 1) {
445 			(void) printf("%s", (char *)prop);
446 		} else {
447 			for (i = 0; i < attr.za_num_integers; i++) {
448 				switch (attr.za_integer_length) {
449 				case 2:
450 					(void) printf("%u ",
451 					    ((uint16_t *)prop)[i]);
452 					break;
453 				case 4:
454 					(void) printf("%u ",
455 					    ((uint32_t *)prop)[i]);
456 					break;
457 				case 8:
458 					(void) printf("%lld ",
459 					    (u_longlong_t)((int64_t *)prop)[i]);
460 					break;
461 				}
462 			}
463 		}
464 		(void) printf("\n");
465 		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
466 	}
467 	zap_cursor_fini(&zc);
468 }
469 
470 static void
471 dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
472 {
473 	bpobj_phys_t *bpop = data;
474 	char bytes[32], comp[32], uncomp[32];
475 
476 	/* make sure the output won't get truncated */
477 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
478 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
479 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
480 
481 	if (bpop == NULL)
482 		return;
483 
484 	zdb_nicenum(bpop->bpo_bytes, bytes, sizeof (bytes));
485 	zdb_nicenum(bpop->bpo_comp, comp, sizeof (comp));
486 	zdb_nicenum(bpop->bpo_uncomp, uncomp, sizeof (uncomp));
487 
488 	(void) printf("\t\tnum_blkptrs = %llu\n",
489 	    (u_longlong_t)bpop->bpo_num_blkptrs);
490 	(void) printf("\t\tbytes = %s\n", bytes);
491 	if (size >= BPOBJ_SIZE_V1) {
492 		(void) printf("\t\tcomp = %s\n", comp);
493 		(void) printf("\t\tuncomp = %s\n", uncomp);
494 	}
495 	if (size >= sizeof (*bpop)) {
496 		(void) printf("\t\tsubobjs = %llu\n",
497 		    (u_longlong_t)bpop->bpo_subobjs);
498 		(void) printf("\t\tnum_subobjs = %llu\n",
499 		    (u_longlong_t)bpop->bpo_num_subobjs);
500 	}
501 
502 	if (dump_opt['d'] < 5)
503 		return;
504 
505 	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
506 		char blkbuf[BP_SPRINTF_LEN];
507 		blkptr_t bp;
508 
509 		int err = dmu_read(os, object,
510 		    i * sizeof (bp), sizeof (bp), &bp, 0);
511 		if (err != 0) {
512 			(void) printf("got error %u from dmu_read\n", err);
513 			break;
514 		}
515 		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
516 		(void) printf("\t%s\n", blkbuf);
517 	}
518 }
519 
520 /* ARGSUSED */
521 static void
522 dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
523 {
524 	dmu_object_info_t doi;
525 
526 	VERIFY0(dmu_object_info(os, object, &doi));
527 	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
528 
529 	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
530 	if (err != 0) {
531 		(void) printf("got error %u from dmu_read\n", err);
532 		kmem_free(subobjs, doi.doi_max_offset);
533 		return;
534 	}
535 
536 	int64_t last_nonzero = -1;
537 	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
538 		if (subobjs[i] != 0)
539 			last_nonzero = i;
540 	}
541 
542 	for (int64_t i = 0; i <= last_nonzero; i++) {
543 		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
544 	}
545 	kmem_free(subobjs, doi.doi_max_offset);
546 }
547 
548 /*ARGSUSED*/
549 static void
550 dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
551 {
552 	dump_zap_stats(os, object);
553 	/* contents are printed elsewhere, properly decoded */
554 }
555 
556 /*ARGSUSED*/
557 static void
558 dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
559 {
560 	zap_cursor_t zc;
561 	zap_attribute_t attr;
562 
563 	dump_zap_stats(os, object);
564 	(void) printf("\n");
565 
566 	for (zap_cursor_init(&zc, os, object);
567 	    zap_cursor_retrieve(&zc, &attr) == 0;
568 	    zap_cursor_advance(&zc)) {
569 		(void) printf("\t\t%s = ", attr.za_name);
570 		if (attr.za_num_integers == 0) {
571 			(void) printf("\n");
572 			continue;
573 		}
574 		(void) printf(" %llx : [%d:%d:%d]\n",
575 		    (u_longlong_t)attr.za_first_integer,
576 		    (int)ATTR_LENGTH(attr.za_first_integer),
577 		    (int)ATTR_BSWAP(attr.za_first_integer),
578 		    (int)ATTR_NUM(attr.za_first_integer));
579 	}
580 	zap_cursor_fini(&zc);
581 }
582 
583 /*ARGSUSED*/
584 static void
585 dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
586 {
587 	zap_cursor_t zc;
588 	zap_attribute_t attr;
589 	uint16_t *layout_attrs;
590 	unsigned i;
591 
592 	dump_zap_stats(os, object);
593 	(void) printf("\n");
594 
595 	for (zap_cursor_init(&zc, os, object);
596 	    zap_cursor_retrieve(&zc, &attr) == 0;
597 	    zap_cursor_advance(&zc)) {
598 		(void) printf("\t\t%s = [", attr.za_name);
599 		if (attr.za_num_integers == 0) {
600 			(void) printf("\n");
601 			continue;
602 		}
603 
604 		VERIFY(attr.za_integer_length == 2);
605 		layout_attrs = umem_zalloc(attr.za_num_integers *
606 		    attr.za_integer_length, UMEM_NOFAIL);
607 
608 		VERIFY(zap_lookup(os, object, attr.za_name,
609 		    attr.za_integer_length,
610 		    attr.za_num_integers, layout_attrs) == 0);
611 
612 		for (i = 0; i != attr.za_num_integers; i++)
613 			(void) printf(" %d ", (int)layout_attrs[i]);
614 		(void) printf("]\n");
615 		umem_free(layout_attrs,
616 		    attr.za_num_integers * attr.za_integer_length);
617 	}
618 	zap_cursor_fini(&zc);
619 }
620 
621 /*ARGSUSED*/
622 static void
623 dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
624 {
625 	zap_cursor_t zc;
626 	zap_attribute_t attr;
627 	const char *typenames[] = {
628 		/* 0 */ "not specified",
629 		/* 1 */ "FIFO",
630 		/* 2 */ "Character Device",
631 		/* 3 */ "3 (invalid)",
632 		/* 4 */ "Directory",
633 		/* 5 */ "5 (invalid)",
634 		/* 6 */ "Block Device",
635 		/* 7 */ "7 (invalid)",
636 		/* 8 */ "Regular File",
637 		/* 9 */ "9 (invalid)",
638 		/* 10 */ "Symbolic Link",
639 		/* 11 */ "11 (invalid)",
640 		/* 12 */ "Socket",
641 		/* 13 */ "Door",
642 		/* 14 */ "Event Port",
643 		/* 15 */ "15 (invalid)",
644 	};
645 
646 	dump_zap_stats(os, object);
647 	(void) printf("\n");
648 
649 	for (zap_cursor_init(&zc, os, object);
650 	    zap_cursor_retrieve(&zc, &attr) == 0;
651 	    zap_cursor_advance(&zc)) {
652 		(void) printf("\t\t%s = %lld (type: %s)\n",
653 		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
654 		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
655 	}
656 	zap_cursor_fini(&zc);
657 }
658 
659 static int
660 get_dtl_refcount(vdev_t *vd)
661 {
662 	int refcount = 0;
663 
664 	if (vd->vdev_ops->vdev_op_leaf) {
665 		space_map_t *sm = vd->vdev_dtl_sm;
666 
667 		if (sm != NULL &&
668 		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
669 			return (1);
670 		return (0);
671 	}
672 
673 	for (unsigned c = 0; c < vd->vdev_children; c++)
674 		refcount += get_dtl_refcount(vd->vdev_child[c]);
675 	return (refcount);
676 }
677 
678 static int
679 get_metaslab_refcount(vdev_t *vd)
680 {
681 	int refcount = 0;
682 
683 	if (vd->vdev_top == vd) {
684 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
685 			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
686 
687 			if (sm != NULL &&
688 			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
689 				refcount++;
690 		}
691 	}
692 	for (unsigned c = 0; c < vd->vdev_children; c++)
693 		refcount += get_metaslab_refcount(vd->vdev_child[c]);
694 
695 	return (refcount);
696 }
697 
698 static int
699 get_obsolete_refcount(vdev_t *vd)
700 {
701 	int refcount = 0;
702 
703 	uint64_t obsolete_sm_obj = vdev_obsolete_sm_object(vd);
704 	if (vd->vdev_top == vd && obsolete_sm_obj != 0) {
705 		dmu_object_info_t doi;
706 		VERIFY0(dmu_object_info(vd->vdev_spa->spa_meta_objset,
707 		    obsolete_sm_obj, &doi));
708 		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
709 			refcount++;
710 		}
711 	} else {
712 		ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
713 		ASSERT3U(obsolete_sm_obj, ==, 0);
714 	}
715 	for (unsigned c = 0; c < vd->vdev_children; c++) {
716 		refcount += get_obsolete_refcount(vd->vdev_child[c]);
717 	}
718 
719 	return (refcount);
720 }
721 
722 static int
723 get_prev_obsolete_spacemap_refcount(spa_t *spa)
724 {
725 	uint64_t prev_obj =
726 	    spa->spa_condensing_indirect_phys.scip_prev_obsolete_sm_object;
727 	if (prev_obj != 0) {
728 		dmu_object_info_t doi;
729 		VERIFY0(dmu_object_info(spa->spa_meta_objset, prev_obj, &doi));
730 		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
731 			return (1);
732 		}
733 	}
734 	return (0);
735 }
736 
737 static int
738 get_checkpoint_refcount(vdev_t *vd)
739 {
740 	int refcount = 0;
741 
742 	if (vd->vdev_top == vd && vd->vdev_top_zap != 0 &&
743 	    zap_contains(spa_meta_objset(vd->vdev_spa),
744 	    vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) == 0)
745 		refcount++;
746 
747 	for (uint64_t c = 0; c < vd->vdev_children; c++)
748 		refcount += get_checkpoint_refcount(vd->vdev_child[c]);
749 
750 	return (refcount);
751 }
752 
753 static int
754 verify_spacemap_refcounts(spa_t *spa)
755 {
756 	uint64_t expected_refcount = 0;
757 	uint64_t actual_refcount;
758 
759 	(void) feature_get_refcount(spa,
760 	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
761 	    &expected_refcount);
762 	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
763 	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
764 	actual_refcount += get_obsolete_refcount(spa->spa_root_vdev);
765 	actual_refcount += get_prev_obsolete_spacemap_refcount(spa);
766 	actual_refcount += get_checkpoint_refcount(spa->spa_root_vdev);
767 
768 	if (expected_refcount != actual_refcount) {
769 		(void) printf("space map refcount mismatch: expected %lld != "
770 		    "actual %lld\n",
771 		    (longlong_t)expected_refcount,
772 		    (longlong_t)actual_refcount);
773 		return (2);
774 	}
775 	return (0);
776 }
777 
778 static void
779 dump_spacemap(objset_t *os, space_map_t *sm)
780 {
781 	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
782 	    "INVALID", "INVALID", "INVALID", "INVALID" };
783 
784 	if (sm == NULL)
785 		return;
786 
787 	(void) printf("space map object %llu:\n",
788 	    (longlong_t)sm->sm_object);
789 	(void) printf("  smp_length = 0x%llx\n",
790 	    (longlong_t)sm->sm_phys->smp_length);
791 	(void) printf("  smp_alloc = 0x%llx\n",
792 	    (longlong_t)sm->sm_phys->smp_alloc);
793 
794 	if (dump_opt['d'] < 6 && dump_opt['m'] < 4)
795 		return;
796 
797 	/*
798 	 * Print out the freelist entries in both encoded and decoded form.
799 	 */
800 	uint8_t mapshift = sm->sm_shift;
801 	int64_t alloc = 0;
802 	uint64_t word, entry_id = 0;
803 	for (uint64_t offset = 0; offset < space_map_length(sm);
804 	    offset += sizeof (word)) {
805 
806 		VERIFY0(dmu_read(os, space_map_object(sm), offset,
807 		    sizeof (word), &word, DMU_READ_PREFETCH));
808 
809 		if (sm_entry_is_debug(word)) {
810 			(void) printf("\t    [%6llu] %s: txg %llu pass %llu\n",
811 			    (u_longlong_t)entry_id,
812 			    ddata[SM_DEBUG_ACTION_DECODE(word)],
813 			    (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
814 			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
815 			entry_id++;
816 			continue;
817 		}
818 
819 		uint8_t words;
820 		char entry_type;
821 		uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;
822 
823 		if (sm_entry_is_single_word(word)) {
824 			entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
825 			    'A' : 'F';
826 			entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
827 			    sm->sm_start;
828 			entry_run = SM_RUN_DECODE(word) << mapshift;
829 			words = 1;
830 		} else {
831 			/* it is a two-word entry so we read another word */
832 			ASSERT(sm_entry_is_double_word(word));
833 
834 			uint64_t extra_word;
835 			offset += sizeof (extra_word);
836 			VERIFY0(dmu_read(os, space_map_object(sm), offset,
837 			    sizeof (extra_word), &extra_word,
838 			    DMU_READ_PREFETCH));
839 
840 			ASSERT3U(offset, <=, space_map_length(sm));
841 
842 			entry_run = SM2_RUN_DECODE(word) << mapshift;
843 			entry_vdev = SM2_VDEV_DECODE(word);
844 			entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
845 			    'A' : 'F';
846 			entry_off = (SM2_OFFSET_DECODE(extra_word) <<
847 			    mapshift) + sm->sm_start;
848 			words = 2;
849 		}
850 
851 		(void) printf("\t    [%6llu]    %c  range:"
852 		    " %010llx-%010llx  size: %06llx vdev: %06llu words: %u\n",
853 		    (u_longlong_t)entry_id,
854 		    entry_type, (u_longlong_t)entry_off,
855 		    (u_longlong_t)(entry_off + entry_run),
856 		    (u_longlong_t)entry_run,
857 		    (u_longlong_t)entry_vdev, words);
858 
859 		if (entry_type == 'A')
860 			alloc += entry_run;
861 		else
862 			alloc -= entry_run;
863 		entry_id++;
864 	}
865 	if (alloc != space_map_allocated(sm)) {
866 		(void) printf("space_map_object alloc (%lld) INCONSISTENT "
867 		    "with space map summary (%lld)\n",
868 		    (longlong_t)space_map_allocated(sm), (longlong_t)alloc);
869 	}
870 }
871 
872 static void
873 dump_metaslab_stats(metaslab_t *msp)
874 {
875 	char maxbuf[32];
876 	range_tree_t *rt = msp->ms_allocatable;
877 	avl_tree_t *t = &msp->ms_allocatable_by_size;
878 	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
879 
880 	/* max sure nicenum has enough space */
881 	CTASSERT(sizeof (maxbuf) >= NN_NUMBUF_SZ);
882 
883 	zdb_nicenum(metaslab_block_maxsize(msp), maxbuf, sizeof (maxbuf));
884 
885 	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
886 	    "segments", avl_numnodes(t), "maxsize", maxbuf,
887 	    "freepct", free_pct);
888 	(void) printf("\tIn-memory histogram:\n");
889 	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
890 }
891 
892 static void
893 dump_metaslab(metaslab_t *msp)
894 {
895 	vdev_t *vd = msp->ms_group->mg_vd;
896 	spa_t *spa = vd->vdev_spa;
897 	space_map_t *sm = msp->ms_sm;
898 	char freebuf[32];
899 
900 	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf,
901 	    sizeof (freebuf));
902 
903 	(void) printf(
904 	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
905 	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
906 	    (u_longlong_t)space_map_object(sm), freebuf);
907 
908 	if (dump_opt['m'] > 2 && !dump_opt['L']) {
909 		mutex_enter(&msp->ms_lock);
910 		VERIFY0(metaslab_load(msp));
911 		range_tree_stat_verify(msp->ms_allocatable);
912 		dump_metaslab_stats(msp);
913 		metaslab_unload(msp);
914 		mutex_exit(&msp->ms_lock);
915 	}
916 
917 	if (dump_opt['m'] > 1 && sm != NULL &&
918 	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
919 		/*
920 		 * The space map histogram represents free space in chunks
921 		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
922 		 */
923 		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
924 		    (u_longlong_t)msp->ms_fragmentation);
925 		dump_histogram(sm->sm_phys->smp_histogram,
926 		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
927 	}
928 
929 	ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
930 	dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
931 }
932 
933 static void
934 print_vdev_metaslab_header(vdev_t *vd)
935 {
936 	vdev_alloc_bias_t alloc_bias = vd->vdev_alloc_bias;
937 	const char *bias_str;
938 
939 	bias_str = (alloc_bias == VDEV_BIAS_LOG || vd->vdev_islog) ?
940 	    VDEV_ALLOC_BIAS_LOG :
941 	    (alloc_bias == VDEV_BIAS_SPECIAL) ? VDEV_ALLOC_BIAS_SPECIAL :
942 	    (alloc_bias == VDEV_BIAS_DEDUP) ? VDEV_ALLOC_BIAS_DEDUP :
943 	    vd->vdev_islog ? "log" : "";
944 
945 	(void) printf("\tvdev %10llu   %s\n"
946 	    "\t%-10s%5llu   %-19s   %-15s   %-12s\n",
947 	    (u_longlong_t)vd->vdev_id, bias_str,
948 	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
949 	    "offset", "spacemap", "free");
950 	(void) printf("\t%15s   %19s   %15s   %12s\n",
951 	    "---------------", "-------------------",
952 	    "---------------", "------------");
953 }
954 
955 static void
956 dump_metaslab_groups(spa_t *spa)
957 {
958 	vdev_t *rvd = spa->spa_root_vdev;
959 	metaslab_class_t *mc = spa_normal_class(spa);
960 	uint64_t fragmentation;
961 
962 	metaslab_class_histogram_verify(mc);
963 
964 	for (unsigned c = 0; c < rvd->vdev_children; c++) {
965 		vdev_t *tvd = rvd->vdev_child[c];
966 		metaslab_group_t *mg = tvd->vdev_mg;
967 
968 		if (mg == NULL || mg->mg_class != mc)
969 			continue;
970 
971 		metaslab_group_histogram_verify(mg);
972 		mg->mg_fragmentation = metaslab_group_fragmentation(mg);
973 
974 		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
975 		    "fragmentation",
976 		    (u_longlong_t)tvd->vdev_id,
977 		    (u_longlong_t)tvd->vdev_ms_count);
978 		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
979 			(void) printf("%3s\n", "-");
980 		} else {
981 			(void) printf("%3llu%%\n",
982 			    (u_longlong_t)mg->mg_fragmentation);
983 		}
984 		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
985 	}
986 
987 	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
988 	fragmentation = metaslab_class_fragmentation(mc);
989 	if (fragmentation == ZFS_FRAG_INVALID)
990 		(void) printf("\t%3s\n", "-");
991 	else
992 		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
993 	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
994 }
995 
996 static void
997 print_vdev_indirect(vdev_t *vd)
998 {
999 	vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
1000 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
1001 	vdev_indirect_births_t *vib = vd->vdev_indirect_births;
1002 
1003 	if (vim == NULL) {
1004 		ASSERT3P(vib, ==, NULL);
1005 		return;
1006 	}
1007 
1008 	ASSERT3U(vdev_indirect_mapping_object(vim), ==,
1009 	    vic->vic_mapping_object);
1010 	ASSERT3U(vdev_indirect_births_object(vib), ==,
1011 	    vic->vic_births_object);
1012 
1013 	(void) printf("indirect births obj %llu:\n",
1014 	    (longlong_t)vic->vic_births_object);
1015 	(void) printf("    vib_count = %llu\n",
1016 	    (longlong_t)vdev_indirect_births_count(vib));
1017 	for (uint64_t i = 0; i < vdev_indirect_births_count(vib); i++) {
1018 		vdev_indirect_birth_entry_phys_t *cur_vibe =
1019 		    &vib->vib_entries[i];
1020 		(void) printf("\toffset %llx -> txg %llu\n",
1021 		    (longlong_t)cur_vibe->vibe_offset,
1022 		    (longlong_t)cur_vibe->vibe_phys_birth_txg);
1023 	}
1024 	(void) printf("\n");
1025 
1026 	(void) printf("indirect mapping obj %llu:\n",
1027 	    (longlong_t)vic->vic_mapping_object);
1028 	(void) printf("    vim_max_offset = 0x%llx\n",
1029 	    (longlong_t)vdev_indirect_mapping_max_offset(vim));
1030 	(void) printf("    vim_bytes_mapped = 0x%llx\n",
1031 	    (longlong_t)vdev_indirect_mapping_bytes_mapped(vim));
1032 	(void) printf("    vim_count = %llu\n",
1033 	    (longlong_t)vdev_indirect_mapping_num_entries(vim));
1034 
1035 	if (dump_opt['d'] <= 5 && dump_opt['m'] <= 3)
1036 		return;
1037 
1038 	uint32_t *counts = vdev_indirect_mapping_load_obsolete_counts(vim);
1039 
1040 	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
1041 		vdev_indirect_mapping_entry_phys_t *vimep =
1042 		    &vim->vim_entries[i];
1043 		(void) printf("\t<%llx:%llx:%llx> -> "
1044 		    "<%llx:%llx:%llx> (%x obsolete)\n",
1045 		    (longlong_t)vd->vdev_id,
1046 		    (longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
1047 		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1048 		    (longlong_t)DVA_GET_VDEV(&vimep->vimep_dst),
1049 		    (longlong_t)DVA_GET_OFFSET(&vimep->vimep_dst),
1050 		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1051 		    counts[i]);
1052 	}
1053 	(void) printf("\n");
1054 
1055 	uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd);
1056 	if (obsolete_sm_object != 0) {
1057 		objset_t *mos = vd->vdev_spa->spa_meta_objset;
1058 		(void) printf("obsolete space map object %llu:\n",
1059 		    (u_longlong_t)obsolete_sm_object);
1060 		ASSERT(vd->vdev_obsolete_sm != NULL);
1061 		ASSERT3U(space_map_object(vd->vdev_obsolete_sm), ==,
1062 		    obsolete_sm_object);
1063 		dump_spacemap(mos, vd->vdev_obsolete_sm);
1064 		(void) printf("\n");
1065 	}
1066 }
1067 
1068 static void
1069 dump_metaslabs(spa_t *spa)
1070 {
1071 	vdev_t *vd, *rvd = spa->spa_root_vdev;
1072 	uint64_t m, c = 0, children = rvd->vdev_children;
1073 
1074 	(void) printf("\nMetaslabs:\n");
1075 
1076 	if (!dump_opt['d'] && zopt_objects > 0) {
1077 		c = zopt_object[0];
1078 
1079 		if (c >= children)
1080 			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
1081 
1082 		if (zopt_objects > 1) {
1083 			vd = rvd->vdev_child[c];
1084 			print_vdev_metaslab_header(vd);
1085 
1086 			for (m = 1; m < zopt_objects; m++) {
1087 				if (zopt_object[m] < vd->vdev_ms_count)
1088 					dump_metaslab(
1089 					    vd->vdev_ms[zopt_object[m]]);
1090 				else
1091 					(void) fprintf(stderr, "bad metaslab "
1092 					    "number %llu\n",
1093 					    (u_longlong_t)zopt_object[m]);
1094 			}
1095 			(void) printf("\n");
1096 			return;
1097 		}
1098 		children = c + 1;
1099 	}
1100 	for (; c < children; c++) {
1101 		vd = rvd->vdev_child[c];
1102 		print_vdev_metaslab_header(vd);
1103 
1104 		print_vdev_indirect(vd);
1105 
1106 		for (m = 0; m < vd->vdev_ms_count; m++)
1107 			dump_metaslab(vd->vdev_ms[m]);
1108 		(void) printf("\n");
1109 	}
1110 }
1111 
1112 static void
1113 dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
1114 {
1115 	const ddt_phys_t *ddp = dde->dde_phys;
1116 	const ddt_key_t *ddk = &dde->dde_key;
1117 	const char *types[4] = { "ditto", "single", "double", "triple" };
1118 	char blkbuf[BP_SPRINTF_LEN];
1119 	blkptr_t blk;
1120 
1121 	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
1122 		if (ddp->ddp_phys_birth == 0)
1123 			continue;
1124 		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
1125 		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
1126 		(void) printf("index %llx refcnt %llu %s %s\n",
1127 		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
1128 		    types[p], blkbuf);
1129 	}
1130 }
1131 
1132 static void
1133 dump_dedup_ratio(const ddt_stat_t *dds)
1134 {
1135 	double rL, rP, rD, D, dedup, compress, copies;
1136 
1137 	if (dds->dds_blocks == 0)
1138 		return;
1139 
1140 	rL = (double)dds->dds_ref_lsize;
1141 	rP = (double)dds->dds_ref_psize;
1142 	rD = (double)dds->dds_ref_dsize;
1143 	D = (double)dds->dds_dsize;
1144 
1145 	dedup = rD / D;
1146 	compress = rL / rP;
1147 	copies = rD / rP;
1148 
1149 	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
1150 	    "dedup * compress / copies = %.2f\n\n",
1151 	    dedup, compress, copies, dedup * compress / copies);
1152 }
1153 
1154 static void
1155 dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
1156 {
1157 	char name[DDT_NAMELEN];
1158 	ddt_entry_t dde;
1159 	uint64_t walk = 0;
1160 	dmu_object_info_t doi;
1161 	uint64_t count, dspace, mspace;
1162 	int error;
1163 
1164 	error = ddt_object_info(ddt, type, class, &doi);
1165 
1166 	if (error == ENOENT)
1167 		return;
1168 	ASSERT(error == 0);
1169 
1170 	if ((count = ddt_object_count(ddt, type, class)) == 0)
1171 		return;
1172 
1173 	dspace = doi.doi_physical_blocks_512 << 9;
1174 	mspace = doi.doi_fill_count * doi.doi_data_block_size;
1175 
1176 	ddt_object_name(ddt, type, class, name);
1177 
1178 	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
1179 	    name,
1180 	    (u_longlong_t)count,
1181 	    (u_longlong_t)(dspace / count),
1182 	    (u_longlong_t)(mspace / count));
1183 
1184 	if (dump_opt['D'] < 3)
1185 		return;
1186 
1187 	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
1188 
1189 	if (dump_opt['D'] < 4)
1190 		return;
1191 
1192 	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
1193 		return;
1194 
1195 	(void) printf("%s contents:\n\n", name);
1196 
1197 	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
1198 		dump_dde(ddt, &dde, walk);
1199 
1200 	ASSERT3U(error, ==, ENOENT);
1201 
1202 	(void) printf("\n");
1203 }
1204 
1205 static void
1206 dump_all_ddts(spa_t *spa)
1207 {
1208 	ddt_histogram_t ddh_total;
1209 	ddt_stat_t dds_total;
1210 
1211 	bzero(&ddh_total, sizeof (ddh_total));
1212 	bzero(&dds_total, sizeof (dds_total));
1213 
1214 	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
1215 		ddt_t *ddt = spa->spa_ddt[c];
1216 		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
1217 			for (enum ddt_class class = 0; class < DDT_CLASSES;
1218 			    class++) {
1219 				dump_ddt(ddt, type, class);
1220 			}
1221 		}
1222 	}
1223 
1224 	ddt_get_dedup_stats(spa, &dds_total);
1225 
1226 	if (dds_total.dds_blocks == 0) {
1227 		(void) printf("All DDTs are empty\n");
1228 		return;
1229 	}
1230 
1231 	(void) printf("\n");
1232 
1233 	if (dump_opt['D'] > 1) {
1234 		(void) printf("DDT histogram (aggregated over all DDTs):\n");
1235 		ddt_get_dedup_histogram(spa, &ddh_total);
1236 		zpool_dump_ddt(&dds_total, &ddh_total);
1237 	}
1238 
1239 	dump_dedup_ratio(&dds_total);
1240 }
1241 
1242 static void
1243 dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1244 {
1245 	char *prefix = arg;
1246 
1247 	(void) printf("%s [%llu,%llu) length %llu\n",
1248 	    prefix,
1249 	    (u_longlong_t)start,
1250 	    (u_longlong_t)(start + size),
1251 	    (u_longlong_t)(size));
1252 }
1253 
1254 static void
1255 dump_dtl(vdev_t *vd, int indent)
1256 {
1257 	spa_t *spa = vd->vdev_spa;
1258 	boolean_t required;
1259 	const char *name[DTL_TYPES] = { "missing", "partial", "scrub",
1260 		"outage" };
1261 	char prefix[256];
1262 
1263 	spa_vdev_state_enter(spa, SCL_NONE);
1264 	required = vdev_dtl_required(vd);
1265 	(void) spa_vdev_state_exit(spa, NULL, 0);
1266 
1267 	if (indent == 0)
1268 		(void) printf("\nDirty time logs:\n\n");
1269 
1270 	(void) printf("\t%*s%s [%s]\n", indent, "",
1271 	    vd->vdev_path ? vd->vdev_path :
1272 	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1273 	    required ? "DTL-required" : "DTL-expendable");
1274 
1275 	for (int t = 0; t < DTL_TYPES; t++) {
1276 		range_tree_t *rt = vd->vdev_dtl[t];
1277 		if (range_tree_space(rt) == 0)
1278 			continue;
1279 		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1280 		    indent + 2, "", name[t]);
1281 		range_tree_walk(rt, dump_dtl_seg, prefix);
1282 		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1283 			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1284 	}
1285 
1286 	for (unsigned c = 0; c < vd->vdev_children; c++)
1287 		dump_dtl(vd->vdev_child[c], indent + 4);
1288 }
1289 
1290 static void
1291 dump_history(spa_t *spa)
1292 {
1293 	nvlist_t **events = NULL;
1294 	uint64_t resid, len, off = 0;
1295 	uint_t num = 0;
1296 	int error;
1297 	time_t tsec;
1298 	struct tm t;
1299 	char tbuf[30];
1300 	char internalstr[MAXPATHLEN];
1301 
1302 	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
1303 	do {
1304 		len = SPA_MAXBLOCKSIZE;
1305 
1306 		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1307 			(void) fprintf(stderr, "Unable to read history: "
1308 			    "error %d\n", error);
1309 			umem_free(buf, SPA_MAXBLOCKSIZE);
1310 			return;
1311 		}
1312 
1313 		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1314 			break;
1315 
1316 		off -= resid;
1317 	} while (len != 0);
1318 	umem_free(buf, SPA_MAXBLOCKSIZE);
1319 
1320 	(void) printf("\nHistory:\n");
1321 	for (unsigned i = 0; i < num; i++) {
1322 		uint64_t time, txg, ievent;
1323 		char *cmd, *intstr;
1324 		boolean_t printed = B_FALSE;
1325 
1326 		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1327 		    &time) != 0)
1328 			goto next;
1329 		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1330 		    &cmd) != 0) {
1331 			if (nvlist_lookup_uint64(events[i],
1332 			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1333 				goto next;
1334 			verify(nvlist_lookup_uint64(events[i],
1335 			    ZPOOL_HIST_TXG, &txg) == 0);
1336 			verify(nvlist_lookup_string(events[i],
1337 			    ZPOOL_HIST_INT_STR, &intstr) == 0);
1338 			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1339 				goto next;
1340 
1341 			(void) snprintf(internalstr,
1342 			    sizeof (internalstr),
1343 			    "[internal %s txg:%ju] %s",
1344 			    zfs_history_event_names[ievent], (uintmax_t)txg,
1345 			    intstr);
1346 			cmd = internalstr;
1347 		}
1348 		tsec = time;
1349 		(void) localtime_r(&tsec, &t);
1350 		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1351 		(void) printf("%s %s\n", tbuf, cmd);
1352 		printed = B_TRUE;
1353 
1354 next:
1355 		if (dump_opt['h'] > 1) {
1356 			if (!printed)
1357 				(void) printf("unrecognized record:\n");
1358 			dump_nvlist(events[i], 2);
1359 		}
1360 	}
1361 }
1362 
1363 /*ARGSUSED*/
1364 static void
1365 dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1366 {
1367 }
1368 
1369 static uint64_t
1370 blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1371     const zbookmark_phys_t *zb)
1372 {
1373 	if (dnp == NULL) {
1374 		ASSERT(zb->zb_level < 0);
1375 		if (zb->zb_object == 0)
1376 			return (zb->zb_blkid);
1377 		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1378 	}
1379 
1380 	ASSERT(zb->zb_level >= 0);
1381 
1382 	return ((zb->zb_blkid <<
1383 	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1384 	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1385 }
1386 
1387 static void
1388 snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1389 {
1390 	const dva_t *dva = bp->blk_dva;
1391 	int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1392 
1393 	if (dump_opt['b'] >= 6) {
1394 		snprintf_blkptr(blkbuf, buflen, bp);
1395 		return;
1396 	}
1397 
1398 	if (BP_IS_EMBEDDED(bp)) {
1399 		(void) sprintf(blkbuf,
1400 		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
1401 		    (int)BPE_GET_ETYPE(bp),
1402 		    (u_longlong_t)BPE_GET_LSIZE(bp),
1403 		    (u_longlong_t)BPE_GET_PSIZE(bp),
1404 		    (u_longlong_t)bp->blk_birth);
1405 		return;
1406 	}
1407 
1408 	blkbuf[0] = '\0';
1409 	for (int i = 0; i < ndvas; i++)
1410 		(void) snprintf(blkbuf + strlen(blkbuf),
1411 		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1412 		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1413 		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1414 		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1415 
1416 	if (BP_IS_HOLE(bp)) {
1417 		(void) snprintf(blkbuf + strlen(blkbuf),
1418 		    buflen - strlen(blkbuf),
1419 		    "%llxL B=%llu",
1420 		    (u_longlong_t)BP_GET_LSIZE(bp),
1421 		    (u_longlong_t)bp->blk_birth);
1422 	} else {
1423 		(void) snprintf(blkbuf + strlen(blkbuf),
1424 		    buflen - strlen(blkbuf),
1425 		    "%llxL/%llxP F=%llu B=%llu/%llu",
1426 		    (u_longlong_t)BP_GET_LSIZE(bp),
1427 		    (u_longlong_t)BP_GET_PSIZE(bp),
1428 		    (u_longlong_t)BP_GET_FILL(bp),
1429 		    (u_longlong_t)bp->blk_birth,
1430 		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1431 	}
1432 }
1433 
1434 static void
1435 print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1436     const dnode_phys_t *dnp)
1437 {
1438 	char blkbuf[BP_SPRINTF_LEN];
1439 	int l;
1440 
1441 	if (!BP_IS_EMBEDDED(bp)) {
1442 		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1443 		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1444 	}
1445 
1446 	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1447 
1448 	ASSERT(zb->zb_level >= 0);
1449 
1450 	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1451 		if (l == zb->zb_level) {
1452 			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1453 		} else {
1454 			(void) printf(" ");
1455 		}
1456 	}
1457 
1458 	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1459 	(void) printf("%s\n", blkbuf);
1460 }
1461 
1462 static int
1463 visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1464     blkptr_t *bp, const zbookmark_phys_t *zb)
1465 {
1466 	int err = 0;
1467 
1468 	if (bp->blk_birth == 0)
1469 		return (0);
1470 
1471 	print_indirect(bp, zb, dnp);
1472 
1473 	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1474 		arc_flags_t flags = ARC_FLAG_WAIT;
1475 		int i;
1476 		blkptr_t *cbp;
1477 		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1478 		arc_buf_t *buf;
1479 		uint64_t fill = 0;
1480 
1481 		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1482 		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1483 		if (err)
1484 			return (err);
1485 		ASSERT(buf->b_data);
1486 
1487 		/* recursively visit blocks below this */
1488 		cbp = buf->b_data;
1489 		for (i = 0; i < epb; i++, cbp++) {
1490 			zbookmark_phys_t czb;
1491 
1492 			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1493 			    zb->zb_level - 1,
1494 			    zb->zb_blkid * epb + i);
1495 			err = visit_indirect(spa, dnp, cbp, &czb);
1496 			if (err)
1497 				break;
1498 			fill += BP_GET_FILL(cbp);
1499 		}
1500 		if (!err)
1501 			ASSERT3U(fill, ==, BP_GET_FILL(bp));
1502 		arc_buf_destroy(buf, &buf);
1503 	}
1504 
1505 	return (err);
1506 }
1507 
1508 /*ARGSUSED*/
1509 static void
1510 dump_indirect(dnode_t *dn)
1511 {
1512 	dnode_phys_t *dnp = dn->dn_phys;
1513 	int j;
1514 	zbookmark_phys_t czb;
1515 
1516 	(void) printf("Indirect blocks:\n");
1517 
1518 	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1519 	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1520 	for (j = 0; j < dnp->dn_nblkptr; j++) {
1521 		czb.zb_blkid = j;
1522 		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1523 		    &dnp->dn_blkptr[j], &czb);
1524 	}
1525 
1526 	(void) printf("\n");
1527 }
1528 
1529 /*ARGSUSED*/
1530 static void
1531 dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1532 {
1533 	dsl_dir_phys_t *dd = data;
1534 	time_t crtime;
1535 	char nice[32];
1536 
1537 	/* make sure nicenum has enough space */
1538 	CTASSERT(sizeof (nice) >= NN_NUMBUF_SZ);
1539 
1540 	if (dd == NULL)
1541 		return;
1542 
1543 	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1544 
1545 	crtime = dd->dd_creation_time;
1546 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1547 	(void) printf("\t\thead_dataset_obj = %llu\n",
1548 	    (u_longlong_t)dd->dd_head_dataset_obj);
1549 	(void) printf("\t\tparent_dir_obj = %llu\n",
1550 	    (u_longlong_t)dd->dd_parent_obj);
1551 	(void) printf("\t\torigin_obj = %llu\n",
1552 	    (u_longlong_t)dd->dd_origin_obj);
1553 	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1554 	    (u_longlong_t)dd->dd_child_dir_zapobj);
1555 	zdb_nicenum(dd->dd_used_bytes, nice, sizeof (nice));
1556 	(void) printf("\t\tused_bytes = %s\n", nice);
1557 	zdb_nicenum(dd->dd_compressed_bytes, nice, sizeof (nice));
1558 	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1559 	zdb_nicenum(dd->dd_uncompressed_bytes, nice, sizeof (nice));
1560 	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1561 	zdb_nicenum(dd->dd_quota, nice, sizeof (nice));
1562 	(void) printf("\t\tquota = %s\n", nice);
1563 	zdb_nicenum(dd->dd_reserved, nice, sizeof (nice));
1564 	(void) printf("\t\treserved = %s\n", nice);
1565 	(void) printf("\t\tprops_zapobj = %llu\n",
1566 	    (u_longlong_t)dd->dd_props_zapobj);
1567 	(void) printf("\t\tdeleg_zapobj = %llu\n",
1568 	    (u_longlong_t)dd->dd_deleg_zapobj);
1569 	(void) printf("\t\tflags = %llx\n",
1570 	    (u_longlong_t)dd->dd_flags);
1571 
1572 #define	DO(which) \
1573 	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice, \
1574 	    sizeof (nice)); \
1575 	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1576 	DO(HEAD);
1577 	DO(SNAP);
1578 	DO(CHILD);
1579 	DO(CHILD_RSRV);
1580 	DO(REFRSRV);
1581 #undef DO
1582 	(void) printf("\t\tclones = %llu\n",
1583 	    (u_longlong_t)dd->dd_clones);
1584 }
1585 
1586 /*ARGSUSED*/
1587 static void
1588 dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1589 {
1590 	dsl_dataset_phys_t *ds = data;
1591 	time_t crtime;
1592 	char used[32], compressed[32], uncompressed[32], unique[32];
1593 	char blkbuf[BP_SPRINTF_LEN];
1594 
1595 	/* make sure nicenum has enough space */
1596 	CTASSERT(sizeof (used) >= NN_NUMBUF_SZ);
1597 	CTASSERT(sizeof (compressed) >= NN_NUMBUF_SZ);
1598 	CTASSERT(sizeof (uncompressed) >= NN_NUMBUF_SZ);
1599 	CTASSERT(sizeof (unique) >= NN_NUMBUF_SZ);
1600 
1601 	if (ds == NULL)
1602 		return;
1603 
1604 	ASSERT(size == sizeof (*ds));
1605 	crtime = ds->ds_creation_time;
1606 	zdb_nicenum(ds->ds_referenced_bytes, used, sizeof (used));
1607 	zdb_nicenum(ds->ds_compressed_bytes, compressed, sizeof (compressed));
1608 	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed,
1609 	    sizeof (uncompressed));
1610 	zdb_nicenum(ds->ds_unique_bytes, unique, sizeof (unique));
1611 	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1612 
1613 	(void) printf("\t\tdir_obj = %llu\n",
1614 	    (u_longlong_t)ds->ds_dir_obj);
1615 	(void) printf("\t\tprev_snap_obj = %llu\n",
1616 	    (u_longlong_t)ds->ds_prev_snap_obj);
1617 	(void) printf("\t\tprev_snap_txg = %llu\n",
1618 	    (u_longlong_t)ds->ds_prev_snap_txg);
1619 	(void) printf("\t\tnext_snap_obj = %llu\n",
1620 	    (u_longlong_t)ds->ds_next_snap_obj);
1621 	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1622 	    (u_longlong_t)ds->ds_snapnames_zapobj);
1623 	(void) printf("\t\tnum_children = %llu\n",
1624 	    (u_longlong_t)ds->ds_num_children);
1625 	(void) printf("\t\tuserrefs_obj = %llu\n",
1626 	    (u_longlong_t)ds->ds_userrefs_obj);
1627 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1628 	(void) printf("\t\tcreation_txg = %llu\n",
1629 	    (u_longlong_t)ds->ds_creation_txg);
1630 	(void) printf("\t\tdeadlist_obj = %llu\n",
1631 	    (u_longlong_t)ds->ds_deadlist_obj);
1632 	(void) printf("\t\tused_bytes = %s\n", used);
1633 	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1634 	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1635 	(void) printf("\t\tunique = %s\n", unique);
1636 	(void) printf("\t\tfsid_guid = %llu\n",
1637 	    (u_longlong_t)ds->ds_fsid_guid);
1638 	(void) printf("\t\tguid = %llu\n",
1639 	    (u_longlong_t)ds->ds_guid);
1640 	(void) printf("\t\tflags = %llx\n",
1641 	    (u_longlong_t)ds->ds_flags);
1642 	(void) printf("\t\tnext_clones_obj = %llu\n",
1643 	    (u_longlong_t)ds->ds_next_clones_obj);
1644 	(void) printf("\t\tprops_obj = %llu\n",
1645 	    (u_longlong_t)ds->ds_props_obj);
1646 	(void) printf("\t\tbp = %s\n", blkbuf);
1647 }
1648 
1649 /* ARGSUSED */
1650 static int
1651 dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1652 {
1653 	char blkbuf[BP_SPRINTF_LEN];
1654 
1655 	if (bp->blk_birth != 0) {
1656 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1657 		(void) printf("\t%s\n", blkbuf);
1658 	}
1659 	return (0);
1660 }
1661 
1662 static void
1663 dump_bptree(objset_t *os, uint64_t obj, const char *name)
1664 {
1665 	char bytes[32];
1666 	bptree_phys_t *bt;
1667 	dmu_buf_t *db;
1668 
1669 	/* make sure nicenum has enough space */
1670 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1671 
1672 	if (dump_opt['d'] < 3)
1673 		return;
1674 
1675 	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1676 	bt = db->db_data;
1677 	zdb_nicenum(bt->bt_bytes, bytes, sizeof (bytes));
1678 	(void) printf("\n    %s: %llu datasets, %s\n",
1679 	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1680 	dmu_buf_rele(db, FTAG);
1681 
1682 	if (dump_opt['d'] < 5)
1683 		return;
1684 
1685 	(void) printf("\n");
1686 
1687 	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1688 }
1689 
1690 /* ARGSUSED */
1691 static int
1692 dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1693 {
1694 	char blkbuf[BP_SPRINTF_LEN];
1695 
1696 	ASSERT(bp->blk_birth != 0);
1697 	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1698 	(void) printf("\t%s\n", blkbuf);
1699 	return (0);
1700 }
1701 
1702 static void
1703 dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
1704 {
1705 	char bytes[32];
1706 	char comp[32];
1707 	char uncomp[32];
1708 
1709 	/* make sure nicenum has enough space */
1710 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1711 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1712 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1713 
1714 	if (dump_opt['d'] < 3)
1715 		return;
1716 
1717 	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes, sizeof (bytes));
1718 	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1719 		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp, sizeof (comp));
1720 		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp, sizeof (uncomp));
1721 		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1722 		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1723 		    indent * 8, name,
1724 		    (u_longlong_t)bpo->bpo_object,
1725 		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1726 		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1727 		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1728 		    bytes, comp, uncomp);
1729 
1730 		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1731 			uint64_t subobj;
1732 			bpobj_t subbpo;
1733 			int error;
1734 			VERIFY0(dmu_read(bpo->bpo_os,
1735 			    bpo->bpo_phys->bpo_subobjs,
1736 			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1737 			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1738 			if (error != 0) {
1739 				(void) printf("ERROR %u while trying to open "
1740 				    "subobj id %llu\n",
1741 				    error, (u_longlong_t)subobj);
1742 				continue;
1743 			}
1744 			dump_full_bpobj(&subbpo, "subobj", indent + 1);
1745 			bpobj_close(&subbpo);
1746 		}
1747 	} else {
1748 		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1749 		    indent * 8, name,
1750 		    (u_longlong_t)bpo->bpo_object,
1751 		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1752 		    bytes);
1753 	}
1754 
1755 	if (dump_opt['d'] < 5)
1756 		return;
1757 
1758 
1759 	if (indent == 0) {
1760 		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1761 		(void) printf("\n");
1762 	}
1763 }
1764 
1765 static void
1766 bpobj_count_refd(bpobj_t *bpo)
1767 {
1768 	mos_obj_refd(bpo->bpo_object);
1769 
1770 	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1771 		mos_obj_refd(bpo->bpo_phys->bpo_subobjs);
1772 		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1773 			uint64_t subobj;
1774 			bpobj_t subbpo;
1775 			int error;
1776 			VERIFY0(dmu_read(bpo->bpo_os,
1777 			    bpo->bpo_phys->bpo_subobjs,
1778 			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1779 			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1780 			if (error != 0) {
1781 				(void) printf("ERROR %u while trying to open "
1782 				    "subobj id %llu\n",
1783 				    error, (u_longlong_t)subobj);
1784 				continue;
1785 			}
1786 			bpobj_count_refd(&subbpo);
1787 			bpobj_close(&subbpo);
1788 		}
1789 	}
1790 }
1791 
1792 static void
1793 dump_deadlist(dsl_deadlist_t *dl)
1794 {
1795 	dsl_deadlist_entry_t *dle;
1796 	uint64_t unused;
1797 	char bytes[32];
1798 	char comp[32];
1799 	char uncomp[32];
1800 	uint64_t empty_bpobj =
1801 	    dmu_objset_spa(dl->dl_os)->spa_dsl_pool->dp_empty_bpobj;
1802 
1803 	/* force the tree to be loaded */
1804 	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1805 
1806 	if (dl->dl_oldfmt) {
1807 		if (dl->dl_bpobj.bpo_object != empty_bpobj)
1808 			bpobj_count_refd(&dl->dl_bpobj);
1809 	} else {
1810 		mos_obj_refd(dl->dl_object);
1811 		for (dle = avl_first(&dl->dl_tree); dle;
1812 		    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1813 			if (dle->dle_bpobj.bpo_object != empty_bpobj)
1814 				bpobj_count_refd(&dle->dle_bpobj);
1815 		}
1816 	}
1817 
1818 	/* make sure nicenum has enough space */
1819 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1820 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1821 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1822 
1823 	if (dump_opt['d'] < 3)
1824 		return;
1825 
1826 	if (dl->dl_oldfmt) {
1827 		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1828 		return;
1829 	}
1830 
1831 	zdb_nicenum(dl->dl_phys->dl_used, bytes, sizeof (bytes));
1832 	zdb_nicenum(dl->dl_phys->dl_comp, comp, sizeof (comp));
1833 	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp, sizeof (uncomp));
1834 	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1835 	    bytes, comp, uncomp);
1836 
1837 	if (dump_opt['d'] < 4)
1838 		return;
1839 
1840 	(void) printf("\n");
1841 
1842 	for (dle = avl_first(&dl->dl_tree); dle;
1843 	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1844 		if (dump_opt['d'] >= 5) {
1845 			char buf[128];
1846 			(void) snprintf(buf, sizeof (buf),
1847 			    "mintxg %llu -> obj %llu",
1848 			    (longlong_t)dle->dle_mintxg,
1849 			    (longlong_t)dle->dle_bpobj.bpo_object);
1850 
1851 			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1852 		} else {
1853 			(void) printf("mintxg %llu -> obj %llu\n",
1854 			    (longlong_t)dle->dle_mintxg,
1855 			    (longlong_t)dle->dle_bpobj.bpo_object);
1856 		}
1857 	}
1858 }
1859 
1860 static avl_tree_t idx_tree;
1861 static avl_tree_t domain_tree;
1862 static boolean_t fuid_table_loaded;
1863 static objset_t *sa_os = NULL;
1864 static sa_attr_type_t *sa_attr_table = NULL;
1865 
1866 static int
1867 open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
1868 {
1869 	int err;
1870 	uint64_t sa_attrs = 0;
1871 	uint64_t version = 0;
1872 
1873 	VERIFY3P(sa_os, ==, NULL);
1874 	err = dmu_objset_own(path, type, B_TRUE, tag, osp);
1875 	if (err != 0) {
1876 		(void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
1877 		    strerror(err));
1878 		return (err);
1879 	}
1880 
1881 	if (dmu_objset_type(*osp) == DMU_OST_ZFS) {
1882 		(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1883 		    8, 1, &version);
1884 		if (version >= ZPL_VERSION_SA) {
1885 			(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1886 			    8, 1, &sa_attrs);
1887 		}
1888 		err = sa_setup(*osp, sa_attrs, zfs_attr_table, ZPL_END,
1889 		    &sa_attr_table);
1890 		if (err != 0) {
1891 			(void) fprintf(stderr, "sa_setup failed: %s\n",
1892 			    strerror(err));
1893 			dmu_objset_disown(*osp, tag);
1894 			*osp = NULL;
1895 		}
1896 	}
1897 	sa_os = *osp;
1898 
1899 	return (0);
1900 }
1901 
1902 static void
1903 close_objset(objset_t *os, void *tag)
1904 {
1905 	VERIFY3P(os, ==, sa_os);
1906 	if (os->os_sa != NULL)
1907 		sa_tear_down(os);
1908 	dmu_objset_disown(os, tag);
1909 	sa_attr_table = NULL;
1910 	sa_os = NULL;
1911 }
1912 
1913 static void
1914 fuid_table_destroy()
1915 {
1916 	if (fuid_table_loaded) {
1917 		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1918 		fuid_table_loaded = B_FALSE;
1919 	}
1920 }
1921 
1922 /*
1923  * print uid or gid information.
1924  * For normal POSIX id just the id is printed in decimal format.
1925  * For CIFS files with FUID the fuid is printed in hex followed by
1926  * the domain-rid string.
1927  */
1928 static void
1929 print_idstr(uint64_t id, const char *id_type)
1930 {
1931 	if (FUID_INDEX(id)) {
1932 		char *domain;
1933 
1934 		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1935 		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1936 		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1937 	} else {
1938 		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1939 	}
1940 
1941 }
1942 
1943 static void
1944 dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1945 {
1946 	uint32_t uid_idx, gid_idx;
1947 
1948 	uid_idx = FUID_INDEX(uid);
1949 	gid_idx = FUID_INDEX(gid);
1950 
1951 	/* Load domain table, if not already loaded */
1952 	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1953 		uint64_t fuid_obj;
1954 
1955 		/* first find the fuid object.  It lives in the master node */
1956 		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1957 		    8, 1, &fuid_obj) == 0);
1958 		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1959 		(void) zfs_fuid_table_load(os, fuid_obj,
1960 		    &idx_tree, &domain_tree);
1961 		fuid_table_loaded = B_TRUE;
1962 	}
1963 
1964 	print_idstr(uid, "uid");
1965 	print_idstr(gid, "gid");
1966 }
1967 
1968 /*ARGSUSED*/
1969 static void
1970 dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1971 {
1972 	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
1973 	sa_handle_t *hdl;
1974 	uint64_t xattr, rdev, gen;
1975 	uint64_t uid, gid, mode, fsize, parent, links;
1976 	uint64_t pflags;
1977 	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1978 	time_t z_crtime, z_atime, z_mtime, z_ctime;
1979 	sa_bulk_attr_t bulk[12];
1980 	int idx = 0;
1981 	int error;
1982 
1983 	VERIFY3P(os, ==, sa_os);
1984 	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1985 		(void) printf("Failed to get handle for SA znode\n");
1986 		return;
1987 	}
1988 
1989 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1990 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1991 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1992 	    &links, 8);
1993 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1994 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1995 	    &mode, 8);
1996 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1997 	    NULL, &parent, 8);
1998 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
1999 	    &fsize, 8);
2000 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
2001 	    acctm, 16);
2002 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
2003 	    modtm, 16);
2004 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
2005 	    crtm, 16);
2006 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
2007 	    chgtm, 16);
2008 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
2009 	    &pflags, 8);
2010 
2011 	if (sa_bulk_lookup(hdl, bulk, idx)) {
2012 		(void) sa_handle_destroy(hdl);
2013 		return;
2014 	}
2015 
2016 	z_crtime = (time_t)crtm[0];
2017 	z_atime = (time_t)acctm[0];
2018 	z_mtime = (time_t)modtm[0];
2019 	z_ctime = (time_t)chgtm[0];
2020 
2021 	if (dump_opt['d'] > 4) {
2022 		error = zfs_obj_to_path(os, object, path, sizeof (path));
2023 		if (error == ESTALE) {
2024 			(void) snprintf(path, sizeof (path), "on delete queue");
2025 		} else if (error != 0) {
2026 			leaked_objects++;
2027 			(void) snprintf(path, sizeof (path),
2028 			    "path not found, possibly leaked");
2029 		}
2030 		(void) printf("\tpath	%s\n", path);
2031 	}
2032 	dump_uidgid(os, uid, gid);
2033 	(void) printf("\tatime	%s", ctime(&z_atime));
2034 	(void) printf("\tmtime	%s", ctime(&z_mtime));
2035 	(void) printf("\tctime	%s", ctime(&z_ctime));
2036 	(void) printf("\tcrtime	%s", ctime(&z_crtime));
2037 	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
2038 	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
2039 	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
2040 	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
2041 	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
2042 	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
2043 	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
2044 	    sizeof (uint64_t)) == 0)
2045 		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
2046 	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
2047 	    sizeof (uint64_t)) == 0)
2048 		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
2049 	sa_handle_destroy(hdl);
2050 }
2051 
2052 /*ARGSUSED*/
2053 static void
2054 dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
2055 {
2056 }
2057 
2058 /*ARGSUSED*/
2059 static void
2060 dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
2061 {
2062 }
2063 
2064 static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
2065 	dump_none,		/* unallocated			*/
2066 	dump_zap,		/* object directory		*/
2067 	dump_uint64,		/* object array			*/
2068 	dump_none,		/* packed nvlist		*/
2069 	dump_packed_nvlist,	/* packed nvlist size		*/
2070 	dump_none,		/* bpobj			*/
2071 	dump_bpobj,		/* bpobj header			*/
2072 	dump_none,		/* SPA space map header		*/
2073 	dump_none,		/* SPA space map		*/
2074 	dump_none,		/* ZIL intent log		*/
2075 	dump_dnode,		/* DMU dnode			*/
2076 	dump_dmu_objset,	/* DMU objset			*/
2077 	dump_dsl_dir,		/* DSL directory		*/
2078 	dump_zap,		/* DSL directory child map	*/
2079 	dump_zap,		/* DSL dataset snap map		*/
2080 	dump_zap,		/* DSL props			*/
2081 	dump_dsl_dataset,	/* DSL dataset			*/
2082 	dump_znode,		/* ZFS znode			*/
2083 	dump_acl,		/* ZFS V0 ACL			*/
2084 	dump_uint8,		/* ZFS plain file		*/
2085 	dump_zpldir,		/* ZFS directory		*/
2086 	dump_zap,		/* ZFS master node		*/
2087 	dump_zap,		/* ZFS delete queue		*/
2088 	dump_uint8,		/* zvol object			*/
2089 	dump_zap,		/* zvol prop			*/
2090 	dump_uint8,		/* other uint8[]		*/
2091 	dump_uint64,		/* other uint64[]		*/
2092 	dump_zap,		/* other ZAP			*/
2093 	dump_zap,		/* persistent error log		*/
2094 	dump_uint8,		/* SPA history			*/
2095 	dump_history_offsets,	/* SPA history offsets		*/
2096 	dump_zap,		/* Pool properties		*/
2097 	dump_zap,		/* DSL permissions		*/
2098 	dump_acl,		/* ZFS ACL			*/
2099 	dump_uint8,		/* ZFS SYSACL			*/
2100 	dump_none,		/* FUID nvlist			*/
2101 	dump_packed_nvlist,	/* FUID nvlist size		*/
2102 	dump_zap,		/* DSL dataset next clones	*/
2103 	dump_zap,		/* DSL scrub queue		*/
2104 	dump_zap,		/* ZFS user/group used		*/
2105 	dump_zap,		/* ZFS user/group quota		*/
2106 	dump_zap,		/* snapshot refcount tags	*/
2107 	dump_ddt_zap,		/* DDT ZAP object		*/
2108 	dump_zap,		/* DDT statistics		*/
2109 	dump_znode,		/* SA object			*/
2110 	dump_zap,		/* SA Master Node		*/
2111 	dump_sa_attrs,		/* SA attribute registration	*/
2112 	dump_sa_layouts,	/* SA attribute layouts		*/
2113 	dump_zap,		/* DSL scrub translations	*/
2114 	dump_none,		/* fake dedup BP		*/
2115 	dump_zap,		/* deadlist			*/
2116 	dump_none,		/* deadlist hdr			*/
2117 	dump_zap,		/* dsl clones			*/
2118 	dump_bpobj_subobjs,	/* bpobj subobjs		*/
2119 	dump_unknown,		/* Unknown type, must be last	*/
2120 };
2121 
2122 static void
2123 dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header,
2124     uint64_t *dnode_slots_used)
2125 {
2126 	dmu_buf_t *db = NULL;
2127 	dmu_object_info_t doi;
2128 	dnode_t *dn;
2129 	void *bonus = NULL;
2130 	size_t bsize = 0;
2131 	char iblk[32], dblk[32], lsize[32], asize[32], fill[32], dnsize[32];
2132 	char bonus_size[32];
2133 	char aux[50];
2134 	int error;
2135 
2136 	/* make sure nicenum has enough space */
2137 	CTASSERT(sizeof (iblk) >= NN_NUMBUF_SZ);
2138 	CTASSERT(sizeof (dblk) >= NN_NUMBUF_SZ);
2139 	CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
2140 	CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
2141 	CTASSERT(sizeof (bonus_size) >= NN_NUMBUF_SZ);
2142 
2143 	if (*print_header) {
2144 		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %6s  %5s  %6s  %s\n",
2145 		    "Object", "lvl", "iblk", "dblk", "dsize", "dnsize",
2146 		    "lsize", "%full", "type");
2147 		*print_header = 0;
2148 	}
2149 
2150 	if (object == 0) {
2151 		dn = DMU_META_DNODE(os);
2152 	} else {
2153 		error = dmu_bonus_hold(os, object, FTAG, &db);
2154 		if (error)
2155 			fatal("dmu_bonus_hold(%llu) failed, errno %u",
2156 			    object, error);
2157 		bonus = db->db_data;
2158 		bsize = db->db_size;
2159 		dn = DB_DNODE((dmu_buf_impl_t *)db);
2160 	}
2161 	dmu_object_info_from_dnode(dn, &doi);
2162 
2163 	if (dnode_slots_used != NULL)
2164 		*dnode_slots_used = doi.doi_dnodesize / DNODE_MIN_SIZE;
2165 
2166 	zdb_nicenum(doi.doi_metadata_block_size, iblk, sizeof (iblk));
2167 	zdb_nicenum(doi.doi_data_block_size, dblk, sizeof (dblk));
2168 	zdb_nicenum(doi.doi_max_offset, lsize, sizeof (lsize));
2169 	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize, sizeof (asize));
2170 	zdb_nicenum(doi.doi_bonus_size, bonus_size, sizeof (bonus_size));
2171 	zdb_nicenum(doi.doi_dnodesize, dnsize, sizeof (dnsize));
2172 	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
2173 	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
2174 	    doi.doi_max_offset);
2175 
2176 	aux[0] = '\0';
2177 
2178 	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
2179 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
2180 		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
2181 	}
2182 
2183 	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
2184 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
2185 		    ZDB_COMPRESS_NAME(doi.doi_compress));
2186 	}
2187 
2188 	(void) printf("%10" PRIu64
2189 	    "  %3u  %5s  %5s  %5s  %5s  %5s  %6s  %s%s\n",
2190 	    object, doi.doi_indirection, iblk, dblk,
2191 	    asize, dnsize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
2192 
2193 	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
2194 		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %5s  %6s  %s\n",
2195 		    "", "", "", "", "", "", bonus_size, "bonus",
2196 		    ZDB_OT_NAME(doi.doi_bonus_type));
2197 	}
2198 
2199 	if (verbosity >= 4) {
2200 		(void) printf("\tdnode flags: %s%s%s\n",
2201 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
2202 		    "USED_BYTES " : "",
2203 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
2204 		    "USERUSED_ACCOUNTED " : "",
2205 		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
2206 		    "SPILL_BLKPTR" : "");
2207 		(void) printf("\tdnode maxblkid: %llu\n",
2208 		    (longlong_t)dn->dn_phys->dn_maxblkid);
2209 
2210 		object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
2211 		    bonus, bsize);
2212 		object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
2213 		*print_header = 1;
2214 	}
2215 
2216 	if (verbosity >= 5)
2217 		dump_indirect(dn);
2218 
2219 	if (verbosity >= 5) {
2220 		/*
2221 		 * Report the list of segments that comprise the object.
2222 		 */
2223 		uint64_t start = 0;
2224 		uint64_t end;
2225 		uint64_t blkfill = 1;
2226 		int minlvl = 1;
2227 
2228 		if (dn->dn_type == DMU_OT_DNODE) {
2229 			minlvl = 0;
2230 			blkfill = DNODES_PER_BLOCK;
2231 		}
2232 
2233 		for (;;) {
2234 			char segsize[32];
2235 			/* make sure nicenum has enough space */
2236 			CTASSERT(sizeof (segsize) >= NN_NUMBUF_SZ);
2237 			error = dnode_next_offset(dn,
2238 			    0, &start, minlvl, blkfill, 0);
2239 			if (error)
2240 				break;
2241 			end = start;
2242 			error = dnode_next_offset(dn,
2243 			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
2244 			zdb_nicenum(end - start, segsize, sizeof (segsize));
2245 			(void) printf("\t\tsegment [%016llx, %016llx)"
2246 			    " size %5s\n", (u_longlong_t)start,
2247 			    (u_longlong_t)end, segsize);
2248 			if (error)
2249 				break;
2250 			start = end;
2251 		}
2252 	}
2253 
2254 	if (db != NULL)
2255 		dmu_buf_rele(db, FTAG);
2256 }
2257 
2258 static void
2259 count_dir_mos_objects(dsl_dir_t *dd)
2260 {
2261 	mos_obj_refd(dd->dd_object);
2262 	mos_obj_refd(dsl_dir_phys(dd)->dd_child_dir_zapobj);
2263 	mos_obj_refd(dsl_dir_phys(dd)->dd_deleg_zapobj);
2264 	mos_obj_refd(dsl_dir_phys(dd)->dd_props_zapobj);
2265 	mos_obj_refd(dsl_dir_phys(dd)->dd_clones);
2266 }
2267 
2268 static void
2269 count_ds_mos_objects(dsl_dataset_t *ds)
2270 {
2271 	mos_obj_refd(ds->ds_object);
2272 	mos_obj_refd(dsl_dataset_phys(ds)->ds_next_clones_obj);
2273 	mos_obj_refd(dsl_dataset_phys(ds)->ds_props_obj);
2274 	mos_obj_refd(dsl_dataset_phys(ds)->ds_userrefs_obj);
2275 	mos_obj_refd(dsl_dataset_phys(ds)->ds_snapnames_zapobj);
2276 
2277 	if (!dsl_dataset_is_snapshot(ds)) {
2278 		count_dir_mos_objects(ds->ds_dir);
2279 	}
2280 }
2281 
2282 static const char *objset_types[DMU_OST_NUMTYPES] = {
2283 	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
2284 
2285 static void
2286 dump_dir(objset_t *os)
2287 {
2288 	dmu_objset_stats_t dds;
2289 	uint64_t object, object_count;
2290 	uint64_t refdbytes, usedobjs, scratch;
2291 	char numbuf[32];
2292 	char blkbuf[BP_SPRINTF_LEN + 20];
2293 	char osname[ZFS_MAX_DATASET_NAME_LEN];
2294 	const char *type = "UNKNOWN";
2295 	int verbosity = dump_opt['d'];
2296 	int print_header = 1;
2297 	unsigned i;
2298 	int error;
2299 	uint64_t total_slots_used = 0;
2300 	uint64_t max_slot_used = 0;
2301 	uint64_t dnode_slots;
2302 
2303 	/* make sure nicenum has enough space */
2304 	CTASSERT(sizeof (numbuf) >= NN_NUMBUF_SZ);
2305 
2306 	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
2307 	dmu_objset_fast_stat(os, &dds);
2308 	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
2309 
2310 	if (dds.dds_type < DMU_OST_NUMTYPES)
2311 		type = objset_types[dds.dds_type];
2312 
2313 	if (dds.dds_type == DMU_OST_META) {
2314 		dds.dds_creation_txg = TXG_INITIAL;
2315 		usedobjs = BP_GET_FILL(os->os_rootbp);
2316 		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
2317 		    dd_used_bytes;
2318 	} else {
2319 		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
2320 	}
2321 
2322 	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
2323 
2324 	zdb_nicenum(refdbytes, numbuf, sizeof (numbuf));
2325 
2326 	if (verbosity >= 4) {
2327 		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
2328 		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
2329 		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
2330 	} else {
2331 		blkbuf[0] = '\0';
2332 	}
2333 
2334 	dmu_objset_name(os, osname);
2335 
2336 	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
2337 	    "%s, %llu objects%s%s\n",
2338 	    osname, type, (u_longlong_t)dmu_objset_id(os),
2339 	    (u_longlong_t)dds.dds_creation_txg,
2340 	    numbuf, (u_longlong_t)usedobjs, blkbuf,
2341 	    (dds.dds_inconsistent) ? " (inconsistent)" : "");
2342 
2343 	if (zopt_objects != 0) {
2344 		for (i = 0; i < zopt_objects; i++)
2345 			dump_object(os, zopt_object[i], verbosity,
2346 			    &print_header, NULL);
2347 		(void) printf("\n");
2348 		return;
2349 	}
2350 
2351 	if (dump_opt['i'] != 0 || verbosity >= 2)
2352 		dump_intent_log(dmu_objset_zil(os));
2353 
2354 	if (dmu_objset_ds(os) != NULL) {
2355 		dsl_dataset_t *ds = dmu_objset_ds(os);
2356 		dump_deadlist(&ds->ds_deadlist);
2357 
2358 		if (dsl_dataset_remap_deadlist_exists(ds)) {
2359 			(void) printf("ds_remap_deadlist:\n");
2360 			dump_deadlist(&ds->ds_remap_deadlist);
2361 		}
2362 		count_ds_mos_objects(ds);
2363 	}
2364 
2365 	if (verbosity < 2)
2366 		return;
2367 
2368 	if (BP_IS_HOLE(os->os_rootbp))
2369 		return;
2370 
2371 	dump_object(os, 0, verbosity, &print_header, NULL);
2372 	object_count = 0;
2373 	if (DMU_USERUSED_DNODE(os) != NULL &&
2374 	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
2375 		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header,
2376 		    NULL);
2377 		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header,
2378 		    NULL);
2379 	}
2380 
2381 	object = 0;
2382 	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2383 		dump_object(os, object, verbosity, &print_header, &dnode_slots);
2384 		object_count++;
2385 		total_slots_used += dnode_slots;
2386 		max_slot_used = object + dnode_slots - 1;
2387 	}
2388 
2389 	ASSERT3U(object_count, ==, usedobjs);
2390 
2391 	(void) printf("\n");
2392 
2393 	(void) printf("    Dnode slots:\n");
2394 	(void) printf("\tTotal used:    %10llu\n",
2395 	    (u_longlong_t)total_slots_used);
2396 	(void) printf("\tMax used:      %10llu\n",
2397 	    (u_longlong_t)max_slot_used);
2398 	(void) printf("\tPercent empty: %10lf\n",
2399 	    (double)(max_slot_used - total_slots_used)*100 /
2400 	    (double)max_slot_used);
2401 
2402 	(void) printf("\n");
2403 
2404 	if (error != ESRCH) {
2405 		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2406 		abort();
2407 	}
2408 	if (leaked_objects != 0) {
2409 		(void) printf("%d potentially leaked objects detected\n",
2410 		    leaked_objects);
2411 		leaked_objects = 0;
2412 	}
2413 }
2414 
2415 static void
2416 dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2417 {
2418 	time_t timestamp = ub->ub_timestamp;
2419 
2420 	(void) printf("%s", header ? header : "");
2421 	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2422 	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2423 	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2424 	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2425 	(void) printf("\ttimestamp = %llu UTC = %s",
2426 	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2427 
2428 	(void) printf("\tmmp_magic = %016llx\n",
2429 	    (u_longlong_t)ub->ub_mmp_magic);
2430 	if (ub->ub_mmp_magic == MMP_MAGIC)
2431 		(void) printf("\tmmp_delay = %0llu\n",
2432 		    (u_longlong_t)ub->ub_mmp_delay);
2433 
2434 	if (dump_opt['u'] >= 3) {
2435 		char blkbuf[BP_SPRINTF_LEN];
2436 		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2437 		(void) printf("\trootbp = %s\n", blkbuf);
2438 	}
2439 	(void) printf("\tcheckpoint_txg = %llu\n",
2440 	    (u_longlong_t)ub->ub_checkpoint_txg);
2441 	(void) printf("%s", footer ? footer : "");
2442 }
2443 
2444 static void
2445 dump_config(spa_t *spa)
2446 {
2447 	dmu_buf_t *db;
2448 	size_t nvsize = 0;
2449 	int error = 0;
2450 
2451 
2452 	error = dmu_bonus_hold(spa->spa_meta_objset,
2453 	    spa->spa_config_object, FTAG, &db);
2454 
2455 	if (error == 0) {
2456 		nvsize = *(uint64_t *)db->db_data;
2457 		dmu_buf_rele(db, FTAG);
2458 
2459 		(void) printf("\nMOS Configuration:\n");
2460 		dump_packed_nvlist(spa->spa_meta_objset,
2461 		    spa->spa_config_object, (void *)&nvsize, 1);
2462 	} else {
2463 		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2464 		    (u_longlong_t)spa->spa_config_object, error);
2465 	}
2466 }
2467 
2468 static void
2469 dump_cachefile(const char *cachefile)
2470 {
2471 	int fd;
2472 	struct stat64 statbuf;
2473 	char *buf;
2474 	nvlist_t *config;
2475 
2476 	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2477 		(void) printf("cannot open '%s': %s\n", cachefile,
2478 		    strerror(errno));
2479 		exit(1);
2480 	}
2481 
2482 	if (fstat64(fd, &statbuf) != 0) {
2483 		(void) printf("failed to stat '%s': %s\n", cachefile,
2484 		    strerror(errno));
2485 		exit(1);
2486 	}
2487 
2488 	if ((buf = malloc(statbuf.st_size)) == NULL) {
2489 		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
2490 		    (u_longlong_t)statbuf.st_size);
2491 		exit(1);
2492 	}
2493 
2494 	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2495 		(void) fprintf(stderr, "failed to read %llu bytes\n",
2496 		    (u_longlong_t)statbuf.st_size);
2497 		exit(1);
2498 	}
2499 
2500 	(void) close(fd);
2501 
2502 	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2503 		(void) fprintf(stderr, "failed to unpack nvlist\n");
2504 		exit(1);
2505 	}
2506 
2507 	free(buf);
2508 
2509 	dump_nvlist(config, 0);
2510 
2511 	nvlist_free(config);
2512 }
2513 
2514 #define	ZDB_MAX_UB_HEADER_SIZE 32
2515 
2516 static void
2517 dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2518 {
2519 	vdev_t vd;
2520 	vdev_t *vdp = &vd;
2521 	char header[ZDB_MAX_UB_HEADER_SIZE];
2522 
2523 	vd.vdev_ashift = ashift;
2524 	vdp->vdev_top = vdp;
2525 
2526 	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2527 		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2528 		uberblock_t *ub = (void *)((char *)lbl + uoff);
2529 
2530 		if (uberblock_verify(ub))
2531 			continue;
2532 
2533 		if ((dump_opt['u'] < 4) &&
2534 		    (ub->ub_mmp_magic == MMP_MAGIC) && ub->ub_mmp_delay &&
2535 		    (i >= VDEV_UBERBLOCK_COUNT(&vd) - MMP_BLOCKS_PER_LABEL))
2536 			continue;
2537 
2538 		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2539 		    "Uberblock[%d]\n", i);
2540 		dump_uberblock(ub, header, "");
2541 	}
2542 }
2543 
2544 static char curpath[PATH_MAX];
2545 
2546 /*
2547  * Iterate through the path components, recursively passing
2548  * current one's obj and remaining path until we find the obj
2549  * for the last one.
2550  */
2551 static int
2552 dump_path_impl(objset_t *os, uint64_t obj, char *name)
2553 {
2554 	int err;
2555 	int header = 1;
2556 	uint64_t child_obj;
2557 	char *s;
2558 	dmu_buf_t *db;
2559 	dmu_object_info_t doi;
2560 
2561 	if ((s = strchr(name, '/')) != NULL)
2562 		*s = '\0';
2563 	err = zap_lookup(os, obj, name, 8, 1, &child_obj);
2564 
2565 	(void) strlcat(curpath, name, sizeof (curpath));
2566 
2567 	if (err != 0) {
2568 		(void) fprintf(stderr, "failed to lookup %s: %s\n",
2569 		    curpath, strerror(err));
2570 		return (err);
2571 	}
2572 
2573 	child_obj = ZFS_DIRENT_OBJ(child_obj);
2574 	err = sa_buf_hold(os, child_obj, FTAG, &db);
2575 	if (err != 0) {
2576 		(void) fprintf(stderr,
2577 		    "failed to get SA dbuf for obj %llu: %s\n",
2578 		    (u_longlong_t)child_obj, strerror(err));
2579 		return (EINVAL);
2580 	}
2581 	dmu_object_info_from_db(db, &doi);
2582 	sa_buf_rele(db, FTAG);
2583 
2584 	if (doi.doi_bonus_type != DMU_OT_SA &&
2585 	    doi.doi_bonus_type != DMU_OT_ZNODE) {
2586 		(void) fprintf(stderr, "invalid bonus type %d for obj %llu\n",
2587 		    doi.doi_bonus_type, (u_longlong_t)child_obj);
2588 		return (EINVAL);
2589 	}
2590 
2591 	if (dump_opt['v'] > 6) {
2592 		(void) printf("obj=%llu %s type=%d bonustype=%d\n",
2593 		    (u_longlong_t)child_obj, curpath, doi.doi_type,
2594 		    doi.doi_bonus_type);
2595 	}
2596 
2597 	(void) strlcat(curpath, "/", sizeof (curpath));
2598 
2599 	switch (doi.doi_type) {
2600 	case DMU_OT_DIRECTORY_CONTENTS:
2601 		if (s != NULL && *(s + 1) != '\0')
2602 			return (dump_path_impl(os, child_obj, s + 1));
2603 		/*FALLTHROUGH*/
2604 	case DMU_OT_PLAIN_FILE_CONTENTS:
2605 		dump_object(os, child_obj, dump_opt['v'], &header, NULL);
2606 		return (0);
2607 	default:
2608 		(void) fprintf(stderr, "object %llu has non-file/directory "
2609 		    "type %d\n", (u_longlong_t)obj, doi.doi_type);
2610 		break;
2611 	}
2612 
2613 	return (EINVAL);
2614 }
2615 
2616 /*
2617  * Dump the blocks for the object specified by path inside the dataset.
2618  */
2619 static int
2620 dump_path(char *ds, char *path)
2621 {
2622 	int err;
2623 	objset_t *os;
2624 	uint64_t root_obj;
2625 
2626 	err = open_objset(ds, DMU_OST_ZFS, FTAG, &os);
2627 	if (err != 0)
2628 		return (err);
2629 
2630 	err = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &root_obj);
2631 	if (err != 0) {
2632 		(void) fprintf(stderr, "can't lookup root znode: %s\n",
2633 		    strerror(err));
2634 		dmu_objset_disown(os, FTAG);
2635 		return (EINVAL);
2636 	}
2637 
2638 	(void) snprintf(curpath, sizeof (curpath), "dataset=%s path=/", ds);
2639 
2640 	err = dump_path_impl(os, root_obj, path);
2641 
2642 	close_objset(os, FTAG);
2643 	return (err);
2644 }
2645 
2646 static int
2647 dump_label(const char *dev)
2648 {
2649 	int fd;
2650 	vdev_label_t label;
2651 	char path[MAXPATHLEN];
2652 	char *buf = label.vl_vdev_phys.vp_nvlist;
2653 	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2654 	struct stat64 statbuf;
2655 	uint64_t psize, ashift;
2656 	boolean_t label_found = B_FALSE;
2657 
2658 	(void) strlcpy(path, dev, sizeof (path));
2659 	if (dev[0] == '/') {
2660 		if (strncmp(dev, ZFS_DISK_ROOTD,
2661 		    strlen(ZFS_DISK_ROOTD)) == 0) {
2662 			(void) snprintf(path, sizeof (path), "%s%s",
2663 			    ZFS_RDISK_ROOTD, dev + strlen(ZFS_DISK_ROOTD));
2664 		}
2665 	} else if (stat64(path, &statbuf) != 0) {
2666 		char *s;
2667 
2668 		(void) snprintf(path, sizeof (path), "%s%s", ZFS_RDISK_ROOTD,
2669 		    dev);
2670 		if (((s = strrchr(dev, 's')) == NULL &&
2671 		    (s = strchr(dev, 'p')) == NULL) ||
2672 		    !isdigit(*(s + 1)))
2673 			(void) strlcat(path, "s0", sizeof (path));
2674 	}
2675 
2676 	if ((fd = open64(path, O_RDONLY)) < 0) {
2677 		(void) fprintf(stderr, "cannot open '%s': %s\n", path,
2678 		    strerror(errno));
2679 		exit(1);
2680 	}
2681 
2682 	if (fstat64(fd, &statbuf) != 0) {
2683 		(void) fprintf(stderr, "failed to stat '%s': %s\n", path,
2684 		    strerror(errno));
2685 		(void) close(fd);
2686 		exit(1);
2687 	}
2688 
2689 	if (S_ISBLK(statbuf.st_mode)) {
2690 		(void) fprintf(stderr,
2691 		    "cannot use '%s': character device required\n", path);
2692 		(void) close(fd);
2693 		exit(1);
2694 	}
2695 
2696 	psize = statbuf.st_size;
2697 	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2698 
2699 	for (int l = 0; l < VDEV_LABELS; l++) {
2700 		nvlist_t *config = NULL;
2701 
2702 		if (!dump_opt['q']) {
2703 			(void) printf("------------------------------------\n");
2704 			(void) printf("LABEL %d\n", l);
2705 			(void) printf("------------------------------------\n");
2706 		}
2707 
2708 		if (pread64(fd, &label, sizeof (label),
2709 		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2710 			if (!dump_opt['q'])
2711 				(void) printf("failed to read label %d\n", l);
2712 			continue;
2713 		}
2714 
2715 		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2716 			if (!dump_opt['q'])
2717 				(void) printf("failed to unpack label %d\n", l);
2718 			ashift = SPA_MINBLOCKSHIFT;
2719 		} else {
2720 			nvlist_t *vdev_tree = NULL;
2721 
2722 			if (!dump_opt['q'])
2723 				dump_nvlist(config, 4);
2724 			if ((nvlist_lookup_nvlist(config,
2725 			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2726 			    (nvlist_lookup_uint64(vdev_tree,
2727 			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2728 				ashift = SPA_MINBLOCKSHIFT;
2729 			nvlist_free(config);
2730 			label_found = B_TRUE;
2731 		}
2732 		if (dump_opt['u'])
2733 			dump_label_uberblocks(&label, ashift);
2734 	}
2735 
2736 	(void) close(fd);
2737 
2738 	return (label_found ? 0 : 2);
2739 }
2740 
2741 static uint64_t dataset_feature_count[SPA_FEATURES];
2742 static uint64_t remap_deadlist_count = 0;
2743 
2744 /*ARGSUSED*/
2745 static int
2746 dump_one_dir(const char *dsname, void *arg)
2747 {
2748 	int error;
2749 	objset_t *os;
2750 
2751 	error = open_objset(dsname, DMU_OST_ANY, FTAG, &os);
2752 	if (error != 0)
2753 		return (0);
2754 
2755 	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
2756 		if (!dmu_objset_ds(os)->ds_feature_inuse[f])
2757 			continue;
2758 		ASSERT(spa_feature_table[f].fi_flags &
2759 		    ZFEATURE_FLAG_PER_DATASET);
2760 		dataset_feature_count[f]++;
2761 	}
2762 
2763 	if (dsl_dataset_remap_deadlist_exists(dmu_objset_ds(os))) {
2764 		remap_deadlist_count++;
2765 	}
2766 
2767 	dump_dir(os);
2768 	close_objset(os, FTAG);
2769 	fuid_table_destroy();
2770 	return (0);
2771 }
2772 
2773 /*
2774  * Block statistics.
2775  */
2776 #define	PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2777 typedef struct zdb_blkstats {
2778 	uint64_t zb_asize;
2779 	uint64_t zb_lsize;
2780 	uint64_t zb_psize;
2781 	uint64_t zb_count;
2782 	uint64_t zb_gangs;
2783 	uint64_t zb_ditto_samevdev;
2784 	uint64_t zb_ditto_same_ms;
2785 	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2786 } zdb_blkstats_t;
2787 
2788 /*
2789  * Extended object types to report deferred frees and dedup auto-ditto blocks.
2790  */
2791 #define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
2792 #define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
2793 #define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
2794 #define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
2795 
2796 static const char *zdb_ot_extname[] = {
2797 	"deferred free",
2798 	"dedup ditto",
2799 	"other",
2800 	"Total",
2801 };
2802 
2803 #define	ZB_TOTAL	DN_MAX_LEVELS
2804 
2805 typedef struct zdb_cb {
2806 	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2807 	uint64_t	zcb_removing_size;
2808 	uint64_t	zcb_checkpoint_size;
2809 	uint64_t	zcb_dedup_asize;
2810 	uint64_t	zcb_dedup_blocks;
2811 	uint64_t	zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2812 	uint64_t	zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2813 	    [BPE_PAYLOAD_SIZE];
2814 	uint64_t	zcb_start;
2815 	hrtime_t	zcb_lastprint;
2816 	uint64_t	zcb_totalasize;
2817 	uint64_t	zcb_errors[256];
2818 	int		zcb_readfails;
2819 	int		zcb_haderrors;
2820 	spa_t		*zcb_spa;
2821 	uint32_t	**zcb_vd_obsolete_counts;
2822 } zdb_cb_t;
2823 
2824 /* test if two DVA offsets from same vdev are within the same metaslab */
2825 static boolean_t
2826 same_metaslab(spa_t *spa, uint64_t vdev, uint64_t off1, uint64_t off2)
2827 {
2828 	vdev_t *vd = vdev_lookup_top(spa, vdev);
2829 	uint64_t ms_shift = vd->vdev_ms_shift;
2830 
2831 	return ((off1 >> ms_shift) == (off2 >> ms_shift));
2832 }
2833 
2834 static void
2835 zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2836     dmu_object_type_t type)
2837 {
2838 	uint64_t refcnt = 0;
2839 
2840 	ASSERT(type < ZDB_OT_TOTAL);
2841 
2842 	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2843 		return;
2844 
2845 	spa_config_enter(zcb->zcb_spa, SCL_CONFIG, FTAG, RW_READER);
2846 
2847 	for (int i = 0; i < 4; i++) {
2848 		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2849 		int t = (i & 1) ? type : ZDB_OT_TOTAL;
2850 		int equal;
2851 		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2852 
2853 		zb->zb_asize += BP_GET_ASIZE(bp);
2854 		zb->zb_lsize += BP_GET_LSIZE(bp);
2855 		zb->zb_psize += BP_GET_PSIZE(bp);
2856 		zb->zb_count++;
2857 
2858 		/*
2859 		 * The histogram is only big enough to record blocks up to
2860 		 * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2861 		 * "other", bucket.
2862 		 */
2863 		unsigned idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2864 		idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2865 		zb->zb_psize_histogram[idx]++;
2866 
2867 		zb->zb_gangs += BP_COUNT_GANG(bp);
2868 
2869 		switch (BP_GET_NDVAS(bp)) {
2870 		case 2:
2871 			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2872 			    DVA_GET_VDEV(&bp->blk_dva[1])) {
2873 				zb->zb_ditto_samevdev++;
2874 
2875 				if (same_metaslab(zcb->zcb_spa,
2876 				    DVA_GET_VDEV(&bp->blk_dva[0]),
2877 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2878 				    DVA_GET_OFFSET(&bp->blk_dva[1])))
2879 					zb->zb_ditto_same_ms++;
2880 			}
2881 			break;
2882 		case 3:
2883 			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2884 			    DVA_GET_VDEV(&bp->blk_dva[1])) +
2885 			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2886 			    DVA_GET_VDEV(&bp->blk_dva[2])) +
2887 			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2888 			    DVA_GET_VDEV(&bp->blk_dva[2]));
2889 			if (equal != 0) {
2890 				zb->zb_ditto_samevdev++;
2891 
2892 				if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2893 				    DVA_GET_VDEV(&bp->blk_dva[1]) &&
2894 				    same_metaslab(zcb->zcb_spa,
2895 				    DVA_GET_VDEV(&bp->blk_dva[0]),
2896 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2897 				    DVA_GET_OFFSET(&bp->blk_dva[1])))
2898 					zb->zb_ditto_same_ms++;
2899 				else if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2900 				    DVA_GET_VDEV(&bp->blk_dva[2]) &&
2901 				    same_metaslab(zcb->zcb_spa,
2902 				    DVA_GET_VDEV(&bp->blk_dva[0]),
2903 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
2904 				    DVA_GET_OFFSET(&bp->blk_dva[2])))
2905 					zb->zb_ditto_same_ms++;
2906 				else if (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2907 				    DVA_GET_VDEV(&bp->blk_dva[2]) &&
2908 				    same_metaslab(zcb->zcb_spa,
2909 				    DVA_GET_VDEV(&bp->blk_dva[1]),
2910 				    DVA_GET_OFFSET(&bp->blk_dva[1]),
2911 				    DVA_GET_OFFSET(&bp->blk_dva[2])))
2912 					zb->zb_ditto_same_ms++;
2913 			}
2914 			break;
2915 		}
2916 	}
2917 
2918 	spa_config_exit(zcb->zcb_spa, SCL_CONFIG, FTAG);
2919 
2920 	if (BP_IS_EMBEDDED(bp)) {
2921 		zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2922 		zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2923 		    [BPE_GET_PSIZE(bp)]++;
2924 		return;
2925 	}
2926 
2927 	if (dump_opt['L'])
2928 		return;
2929 
2930 	if (BP_GET_DEDUP(bp)) {
2931 		ddt_t *ddt;
2932 		ddt_entry_t *dde;
2933 
2934 		ddt = ddt_select(zcb->zcb_spa, bp);
2935 		ddt_enter(ddt);
2936 		dde = ddt_lookup(ddt, bp, B_FALSE);
2937 
2938 		if (dde == NULL) {
2939 			refcnt = 0;
2940 		} else {
2941 			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2942 			ddt_phys_decref(ddp);
2943 			refcnt = ddp->ddp_refcnt;
2944 			if (ddt_phys_total_refcnt(dde) == 0)
2945 				ddt_remove(ddt, dde);
2946 		}
2947 		ddt_exit(ddt);
2948 	}
2949 
2950 	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2951 	    refcnt ? 0 : spa_min_claim_txg(zcb->zcb_spa),
2952 	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2953 }
2954 
2955 static void
2956 zdb_blkptr_done(zio_t *zio)
2957 {
2958 	spa_t *spa = zio->io_spa;
2959 	blkptr_t *bp = zio->io_bp;
2960 	int ioerr = zio->io_error;
2961 	zdb_cb_t *zcb = zio->io_private;
2962 	zbookmark_phys_t *zb = &zio->io_bookmark;
2963 
2964 	abd_free(zio->io_abd);
2965 
2966 	mutex_enter(&spa->spa_scrub_lock);
2967 	spa->spa_scrub_inflight--;
2968 	cv_broadcast(&spa->spa_scrub_io_cv);
2969 
2970 	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
2971 		char blkbuf[BP_SPRINTF_LEN];
2972 
2973 		zcb->zcb_haderrors = 1;
2974 		zcb->zcb_errors[ioerr]++;
2975 
2976 		if (dump_opt['b'] >= 2)
2977 			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2978 		else
2979 			blkbuf[0] = '\0';
2980 
2981 		(void) printf("zdb_blkptr_cb: "
2982 		    "Got error %d reading "
2983 		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
2984 		    ioerr,
2985 		    (u_longlong_t)zb->zb_objset,
2986 		    (u_longlong_t)zb->zb_object,
2987 		    (u_longlong_t)zb->zb_level,
2988 		    (u_longlong_t)zb->zb_blkid,
2989 		    blkbuf);
2990 	}
2991 	mutex_exit(&spa->spa_scrub_lock);
2992 }
2993 
2994 static int
2995 zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2996     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2997 {
2998 	zdb_cb_t *zcb = arg;
2999 	dmu_object_type_t type;
3000 	boolean_t is_metadata;
3001 
3002 	if (bp == NULL)
3003 		return (0);
3004 
3005 	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
3006 		char blkbuf[BP_SPRINTF_LEN];
3007 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3008 		(void) printf("objset %llu object %llu "
3009 		    "level %lld offset 0x%llx %s\n",
3010 		    (u_longlong_t)zb->zb_objset,
3011 		    (u_longlong_t)zb->zb_object,
3012 		    (longlong_t)zb->zb_level,
3013 		    (u_longlong_t)blkid2offset(dnp, bp, zb),
3014 		    blkbuf);
3015 	}
3016 
3017 	if (BP_IS_HOLE(bp))
3018 		return (0);
3019 
3020 	type = BP_GET_TYPE(bp);
3021 
3022 	zdb_count_block(zcb, zilog, bp,
3023 	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
3024 
3025 	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
3026 
3027 	if (!BP_IS_EMBEDDED(bp) &&
3028 	    (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
3029 		size_t size = BP_GET_PSIZE(bp);
3030 		abd_t *abd = abd_alloc(size, B_FALSE);
3031 		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
3032 
3033 		/* If it's an intent log block, failure is expected. */
3034 		if (zb->zb_level == ZB_ZIL_LEVEL)
3035 			flags |= ZIO_FLAG_SPECULATIVE;
3036 
3037 		mutex_enter(&spa->spa_scrub_lock);
3038 		while (spa->spa_scrub_inflight > max_inflight)
3039 			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
3040 		spa->spa_scrub_inflight++;
3041 		mutex_exit(&spa->spa_scrub_lock);
3042 
3043 		zio_nowait(zio_read(NULL, spa, bp, abd, size,
3044 		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
3045 	}
3046 
3047 	zcb->zcb_readfails = 0;
3048 
3049 	/* only call gethrtime() every 100 blocks */
3050 	static int iters;
3051 	if (++iters > 100)
3052 		iters = 0;
3053 	else
3054 		return (0);
3055 
3056 	if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
3057 		uint64_t now = gethrtime();
3058 		char buf[10];
3059 		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
3060 		int kb_per_sec =
3061 		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
3062 		int sec_remaining =
3063 		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
3064 
3065 		/* make sure nicenum has enough space */
3066 		CTASSERT(sizeof (buf) >= NN_NUMBUF_SZ);
3067 
3068 		zfs_nicenum(bytes, buf, sizeof (buf));
3069 		(void) fprintf(stderr,
3070 		    "\r%5s completed (%4dMB/s) "
3071 		    "estimated time remaining: %uhr %02umin %02usec        ",
3072 		    buf, kb_per_sec / 1024,
3073 		    sec_remaining / 60 / 60,
3074 		    sec_remaining / 60 % 60,
3075 		    sec_remaining % 60);
3076 
3077 		zcb->zcb_lastprint = now;
3078 	}
3079 
3080 	return (0);
3081 }
3082 
3083 static void
3084 zdb_leak(void *arg, uint64_t start, uint64_t size)
3085 {
3086 	vdev_t *vd = arg;
3087 
3088 	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
3089 	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
3090 }
3091 
3092 static metaslab_ops_t zdb_metaslab_ops = {
3093 	NULL	/* alloc */
3094 };
3095 
3096 static void
3097 zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
3098 {
3099 	ddt_bookmark_t ddb;
3100 	ddt_entry_t dde;
3101 	int error;
3102 
3103 	ASSERT(!dump_opt['L']);
3104 
3105 	bzero(&ddb, sizeof (ddb));
3106 	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
3107 		blkptr_t blk;
3108 		ddt_phys_t *ddp = dde.dde_phys;
3109 
3110 		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
3111 			return;
3112 
3113 		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
3114 
3115 		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
3116 			if (ddp->ddp_phys_birth == 0)
3117 				continue;
3118 			ddt_bp_create(ddb.ddb_checksum,
3119 			    &dde.dde_key, ddp, &blk);
3120 			if (p == DDT_PHYS_DITTO) {
3121 				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
3122 			} else {
3123 				zcb->zcb_dedup_asize +=
3124 				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
3125 				zcb->zcb_dedup_blocks++;
3126 			}
3127 		}
3128 		ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
3129 		ddt_enter(ddt);
3130 		VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
3131 		ddt_exit(ddt);
3132 	}
3133 
3134 	ASSERT(error == ENOENT);
3135 }
3136 
3137 /* ARGSUSED */
3138 static void
3139 claim_segment_impl_cb(uint64_t inner_offset, vdev_t *vd, uint64_t offset,
3140     uint64_t size, void *arg)
3141 {
3142 	/*
3143 	 * This callback was called through a remap from
3144 	 * a device being removed. Therefore, the vdev that
3145 	 * this callback is applied to is a concrete
3146 	 * vdev.
3147 	 */
3148 	ASSERT(vdev_is_concrete(vd));
3149 
3150 	VERIFY0(metaslab_claim_impl(vd, offset, size,
3151 	    spa_min_claim_txg(vd->vdev_spa)));
3152 }
3153 
3154 static void
3155 claim_segment_cb(void *arg, uint64_t offset, uint64_t size)
3156 {
3157 	vdev_t *vd = arg;
3158 
3159 	vdev_indirect_ops.vdev_op_remap(vd, offset, size,
3160 	    claim_segment_impl_cb, NULL);
3161 }
3162 
3163 /*
3164  * After accounting for all allocated blocks that are directly referenced,
3165  * we might have missed a reference to a block from a partially complete
3166  * (and thus unused) indirect mapping object. We perform a secondary pass
3167  * through the metaslabs we have already mapped and claim the destination
3168  * blocks.
3169  */
3170 static void
3171 zdb_claim_removing(spa_t *spa, zdb_cb_t *zcb)
3172 {
3173 	if (dump_opt['L'])
3174 		return;
3175 
3176 	if (spa->spa_vdev_removal == NULL)
3177 		return;
3178 
3179 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3180 
3181 	spa_vdev_removal_t *svr = spa->spa_vdev_removal;
3182 	vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id);
3183 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3184 
3185 	for (uint64_t msi = 0; msi < vd->vdev_ms_count; msi++) {
3186 		metaslab_t *msp = vd->vdev_ms[msi];
3187 
3188 		if (msp->ms_start >= vdev_indirect_mapping_max_offset(vim))
3189 			break;
3190 
3191 		ASSERT0(range_tree_space(svr->svr_allocd_segs));
3192 
3193 		if (msp->ms_sm != NULL) {
3194 			VERIFY0(space_map_load(msp->ms_sm,
3195 			    svr->svr_allocd_segs, SM_ALLOC));
3196 
3197 			/*
3198 			 * Clear everything past what has been synced unless
3199 			 * it's past the spacemap, because we have not allocated
3200 			 * mappings for it yet.
3201 			 */
3202 			uint64_t vim_max_offset =
3203 			    vdev_indirect_mapping_max_offset(vim);
3204 			uint64_t sm_end = msp->ms_sm->sm_start +
3205 			    msp->ms_sm->sm_size;
3206 			if (sm_end > vim_max_offset)
3207 				range_tree_clear(svr->svr_allocd_segs,
3208 				    vim_max_offset, sm_end - vim_max_offset);
3209 		}
3210 
3211 		zcb->zcb_removing_size +=
3212 		    range_tree_space(svr->svr_allocd_segs);
3213 		range_tree_vacate(svr->svr_allocd_segs, claim_segment_cb, vd);
3214 	}
3215 
3216 	spa_config_exit(spa, SCL_CONFIG, FTAG);
3217 }
3218 
3219 /* ARGSUSED */
3220 static int
3221 increment_indirect_mapping_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3222 {
3223 	zdb_cb_t *zcb = arg;
3224 	spa_t *spa = zcb->zcb_spa;
3225 	vdev_t *vd;
3226 	const dva_t *dva = &bp->blk_dva[0];
3227 
3228 	ASSERT(!dump_opt['L']);
3229 	ASSERT3U(BP_GET_NDVAS(bp), ==, 1);
3230 
3231 	spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
3232 	vd = vdev_lookup_top(zcb->zcb_spa, DVA_GET_VDEV(dva));
3233 	ASSERT3P(vd, !=, NULL);
3234 	spa_config_exit(spa, SCL_VDEV, FTAG);
3235 
3236 	ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0);
3237 	ASSERT3P(zcb->zcb_vd_obsolete_counts[vd->vdev_id], !=, NULL);
3238 
3239 	vdev_indirect_mapping_increment_obsolete_count(
3240 	    vd->vdev_indirect_mapping,
3241 	    DVA_GET_OFFSET(dva), DVA_GET_ASIZE(dva),
3242 	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3243 
3244 	return (0);
3245 }
3246 
3247 static uint32_t *
3248 zdb_load_obsolete_counts(vdev_t *vd)
3249 {
3250 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3251 	spa_t *spa = vd->vdev_spa;
3252 	spa_condensing_indirect_phys_t *scip =
3253 	    &spa->spa_condensing_indirect_phys;
3254 	uint32_t *counts;
3255 
3256 	EQUIV(vdev_obsolete_sm_object(vd) != 0, vd->vdev_obsolete_sm != NULL);
3257 	counts = vdev_indirect_mapping_load_obsolete_counts(vim);
3258 	if (vd->vdev_obsolete_sm != NULL) {
3259 		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3260 		    vd->vdev_obsolete_sm);
3261 	}
3262 	if (scip->scip_vdev == vd->vdev_id &&
3263 	    scip->scip_prev_obsolete_sm_object != 0) {
3264 		space_map_t *prev_obsolete_sm = NULL;
3265 		VERIFY0(space_map_open(&prev_obsolete_sm, spa->spa_meta_objset,
3266 		    scip->scip_prev_obsolete_sm_object, 0, vd->vdev_asize, 0));
3267 		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3268 		    prev_obsolete_sm);
3269 		space_map_close(prev_obsolete_sm);
3270 	}
3271 	return (counts);
3272 }
3273 
3274 typedef struct checkpoint_sm_exclude_entry_arg {
3275 	vdev_t *cseea_vd;
3276 	uint64_t cseea_checkpoint_size;
3277 } checkpoint_sm_exclude_entry_arg_t;
3278 
3279 static int
3280 checkpoint_sm_exclude_entry_cb(space_map_entry_t *sme, void *arg)
3281 {
3282 	checkpoint_sm_exclude_entry_arg_t *cseea = arg;
3283 	vdev_t *vd = cseea->cseea_vd;
3284 	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
3285 	uint64_t end = sme->sme_offset + sme->sme_run;
3286 
3287 	ASSERT(sme->sme_type == SM_FREE);
3288 
3289 	/*
3290 	 * Since the vdev_checkpoint_sm exists in the vdev level
3291 	 * and the ms_sm space maps exist in the metaslab level,
3292 	 * an entry in the checkpoint space map could theoretically
3293 	 * cross the boundaries of the metaslab that it belongs.
3294 	 *
3295 	 * In reality, because of the way that we populate and
3296 	 * manipulate the checkpoint's space maps currently,
3297 	 * there shouldn't be any entries that cross metaslabs.
3298 	 * Hence the assertion below.
3299 	 *
3300 	 * That said, there is no fundamental requirement that
3301 	 * the checkpoint's space map entries should not cross
3302 	 * metaslab boundaries. So if needed we could add code
3303 	 * that handles metaslab-crossing segments in the future.
3304 	 */
3305 	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
3306 	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
3307 
3308 	/*
3309 	 * By removing the entry from the allocated segments we
3310 	 * also verify that the entry is there to begin with.
3311 	 */
3312 	mutex_enter(&ms->ms_lock);
3313 	range_tree_remove(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
3314 	mutex_exit(&ms->ms_lock);
3315 
3316 	cseea->cseea_checkpoint_size += sme->sme_run;
3317 	return (0);
3318 }
3319 
3320 static void
3321 zdb_leak_init_vdev_exclude_checkpoint(vdev_t *vd, zdb_cb_t *zcb)
3322 {
3323 	spa_t *spa = vd->vdev_spa;
3324 	space_map_t *checkpoint_sm = NULL;
3325 	uint64_t checkpoint_sm_obj;
3326 
3327 	/*
3328 	 * If there is no vdev_top_zap, we are in a pool whose
3329 	 * version predates the pool checkpoint feature.
3330 	 */
3331 	if (vd->vdev_top_zap == 0)
3332 		return;
3333 
3334 	/*
3335 	 * If there is no reference of the vdev_checkpoint_sm in
3336 	 * the vdev_top_zap, then one of the following scenarios
3337 	 * is true:
3338 	 *
3339 	 * 1] There is no checkpoint
3340 	 * 2] There is a checkpoint, but no checkpointed blocks
3341 	 *    have been freed yet
3342 	 * 3] The current vdev is indirect
3343 	 *
3344 	 * In these cases we return immediately.
3345 	 */
3346 	if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
3347 	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
3348 		return;
3349 
3350 	VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
3351 	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1,
3352 	    &checkpoint_sm_obj));
3353 
3354 	checkpoint_sm_exclude_entry_arg_t cseea;
3355 	cseea.cseea_vd = vd;
3356 	cseea.cseea_checkpoint_size = 0;
3357 
3358 	VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
3359 	    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
3360 
3361 	VERIFY0(space_map_iterate(checkpoint_sm,
3362 	    space_map_length(checkpoint_sm),
3363 	    checkpoint_sm_exclude_entry_cb, &cseea));
3364 	space_map_close(checkpoint_sm);
3365 
3366 	zcb->zcb_checkpoint_size += cseea.cseea_checkpoint_size;
3367 }
3368 
3369 static void
3370 zdb_leak_init_exclude_checkpoint(spa_t *spa, zdb_cb_t *zcb)
3371 {
3372 	ASSERT(!dump_opt['L']);
3373 
3374 	vdev_t *rvd = spa->spa_root_vdev;
3375 	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3376 		ASSERT3U(c, ==, rvd->vdev_child[c]->vdev_id);
3377 		zdb_leak_init_vdev_exclude_checkpoint(rvd->vdev_child[c], zcb);
3378 	}
3379 }
3380 
3381 static void
3382 load_concrete_ms_allocatable_trees(spa_t *spa, maptype_t maptype)
3383 {
3384 	vdev_t *rvd = spa->spa_root_vdev;
3385 	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
3386 		vdev_t *vd = rvd->vdev_child[i];
3387 
3388 		ASSERT3U(i, ==, vd->vdev_id);
3389 
3390 		if (vd->vdev_ops == &vdev_indirect_ops)
3391 			continue;
3392 
3393 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3394 			metaslab_t *msp = vd->vdev_ms[m];
3395 
3396 			(void) fprintf(stderr,
3397 			    "\rloading concrete vdev %llu, "
3398 			    "metaslab %llu of %llu ...",
3399 			    (longlong_t)vd->vdev_id,
3400 			    (longlong_t)msp->ms_id,
3401 			    (longlong_t)vd->vdev_ms_count);
3402 
3403 			mutex_enter(&msp->ms_lock);
3404 			metaslab_unload(msp);
3405 
3406 			/*
3407 			 * We don't want to spend the CPU manipulating the
3408 			 * size-ordered tree, so clear the range_tree ops.
3409 			 */
3410 			msp->ms_allocatable->rt_ops = NULL;
3411 
3412 			if (msp->ms_sm != NULL) {
3413 				VERIFY0(space_map_load(msp->ms_sm,
3414 				    msp->ms_allocatable, maptype));
3415 			}
3416 			if (!msp->ms_loaded)
3417 				msp->ms_loaded = B_TRUE;
3418 			mutex_exit(&msp->ms_lock);
3419 		}
3420 	}
3421 }
3422 
3423 /*
3424  * vm_idxp is an in-out parameter which (for indirect vdevs) is the
3425  * index in vim_entries that has the first entry in this metaslab.
3426  * On return, it will be set to the first entry after this metaslab.
3427  */
3428 static void
3429 load_indirect_ms_allocatable_tree(vdev_t *vd, metaslab_t *msp,
3430     uint64_t *vim_idxp)
3431 {
3432 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3433 
3434 	mutex_enter(&msp->ms_lock);
3435 	metaslab_unload(msp);
3436 
3437 	/*
3438 	 * We don't want to spend the CPU manipulating the
3439 	 * size-ordered tree, so clear the range_tree ops.
3440 	 */
3441 	msp->ms_allocatable->rt_ops = NULL;
3442 
3443 	for (; *vim_idxp < vdev_indirect_mapping_num_entries(vim);
3444 	    (*vim_idxp)++) {
3445 		vdev_indirect_mapping_entry_phys_t *vimep =
3446 		    &vim->vim_entries[*vim_idxp];
3447 		uint64_t ent_offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3448 		uint64_t ent_len = DVA_GET_ASIZE(&vimep->vimep_dst);
3449 		ASSERT3U(ent_offset, >=, msp->ms_start);
3450 		if (ent_offset >= msp->ms_start + msp->ms_size)
3451 			break;
3452 
3453 		/*
3454 		 * Mappings do not cross metaslab boundaries,
3455 		 * because we create them by walking the metaslabs.
3456 		 */
3457 		ASSERT3U(ent_offset + ent_len, <=,
3458 		    msp->ms_start + msp->ms_size);
3459 		range_tree_add(msp->ms_allocatable, ent_offset, ent_len);
3460 	}
3461 
3462 	if (!msp->ms_loaded)
3463 		msp->ms_loaded = B_TRUE;
3464 	mutex_exit(&msp->ms_lock);
3465 }
3466 
3467 static void
3468 zdb_leak_init_prepare_indirect_vdevs(spa_t *spa, zdb_cb_t *zcb)
3469 {
3470 	ASSERT(!dump_opt['L']);
3471 
3472 	vdev_t *rvd = spa->spa_root_vdev;
3473 	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3474 		vdev_t *vd = rvd->vdev_child[c];
3475 
3476 		ASSERT3U(c, ==, vd->vdev_id);
3477 
3478 		if (vd->vdev_ops != &vdev_indirect_ops)
3479 			continue;
3480 
3481 		/*
3482 		 * Note: we don't check for mapping leaks on
3483 		 * removing vdevs because their ms_allocatable's
3484 		 * are used to look for leaks in allocated space.
3485 		 */
3486 		zcb->zcb_vd_obsolete_counts[c] = zdb_load_obsolete_counts(vd);
3487 
3488 		/*
3489 		 * Normally, indirect vdevs don't have any
3490 		 * metaslabs.  We want to set them up for
3491 		 * zio_claim().
3492 		 */
3493 		VERIFY0(vdev_metaslab_init(vd, 0));
3494 
3495 		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3496 		uint64_t vim_idx = 0;
3497 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3498 
3499 			(void) fprintf(stderr,
3500 			    "\rloading indirect vdev %llu, "
3501 			    "metaslab %llu of %llu ...",
3502 			    (longlong_t)vd->vdev_id,
3503 			    (longlong_t)vd->vdev_ms[m]->ms_id,
3504 			    (longlong_t)vd->vdev_ms_count);
3505 
3506 			load_indirect_ms_allocatable_tree(vd, vd->vdev_ms[m],
3507 			    &vim_idx);
3508 		}
3509 		ASSERT3U(vim_idx, ==, vdev_indirect_mapping_num_entries(vim));
3510 	}
3511 }
3512 
3513 static void
3514 zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
3515 {
3516 	zcb->zcb_spa = spa;
3517 
3518 	if (dump_opt['L'])
3519 		return;
3520 
3521 	dsl_pool_t *dp = spa->spa_dsl_pool;
3522 	vdev_t *rvd = spa->spa_root_vdev;
3523 
3524 	/*
3525 	 * We are going to be changing the meaning of the metaslab's
3526 	 * ms_allocatable.  Ensure that the allocator doesn't try to
3527 	 * use the tree.
3528 	 */
3529 	spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
3530 	spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
3531 
3532 	zcb->zcb_vd_obsolete_counts =
3533 	    umem_zalloc(rvd->vdev_children * sizeof (uint32_t *),
3534 	    UMEM_NOFAIL);
3535 
3536 	/*
3537 	 * For leak detection, we overload the ms_allocatable trees
3538 	 * to contain allocated segments instead of free segments.
3539 	 * As a result, we can't use the normal metaslab_load/unload
3540 	 * interfaces.
3541 	 */
3542 	zdb_leak_init_prepare_indirect_vdevs(spa, zcb);
3543 	load_concrete_ms_allocatable_trees(spa, SM_ALLOC);
3544 
3545 	/*
3546 	 * On load_concrete_ms_allocatable_trees() we loaded all the
3547 	 * allocated entries from the ms_sm to the ms_allocatable for
3548 	 * each metaslab. If the pool has a checkpoint or is in the
3549 	 * middle of discarding a checkpoint, some of these blocks
3550 	 * may have been freed but their ms_sm may not have been
3551 	 * updated because they are referenced by the checkpoint. In
3552 	 * order to avoid false-positives during leak-detection, we
3553 	 * go through the vdev's checkpoint space map and exclude all
3554 	 * its entries from their relevant ms_allocatable.
3555 	 *
3556 	 * We also aggregate the space held by the checkpoint and add
3557 	 * it to zcb_checkpoint_size.
3558 	 *
3559 	 * Note that at this point we are also verifying that all the
3560 	 * entries on the checkpoint_sm are marked as allocated in
3561 	 * the ms_sm of their relevant metaslab.
3562 	 * [see comment in checkpoint_sm_exclude_entry_cb()]
3563 	 */
3564 	zdb_leak_init_exclude_checkpoint(spa, zcb);
3565 	ASSERT3U(zcb->zcb_checkpoint_size, ==, spa_get_checkpoint_space(spa));
3566 
3567 	/* for cleaner progress output */
3568 	(void) fprintf(stderr, "\n");
3569 
3570 	if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
3571 		ASSERT(spa_feature_is_enabled(spa,
3572 		    SPA_FEATURE_DEVICE_REMOVAL));
3573 		(void) bpobj_iterate_nofree(&dp->dp_obsolete_bpobj,
3574 		    increment_indirect_mapping_cb, zcb, NULL);
3575 	}
3576 
3577 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3578 	zdb_ddt_leak_init(spa, zcb);
3579 	spa_config_exit(spa, SCL_CONFIG, FTAG);
3580 }
3581 
3582 static boolean_t
3583 zdb_check_for_obsolete_leaks(vdev_t *vd, zdb_cb_t *zcb)
3584 {
3585 	boolean_t leaks = B_FALSE;
3586 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3587 	uint64_t total_leaked = 0;
3588 
3589 	ASSERT(vim != NULL);
3590 
3591 	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
3592 		vdev_indirect_mapping_entry_phys_t *vimep =
3593 		    &vim->vim_entries[i];
3594 		uint64_t obsolete_bytes = 0;
3595 		uint64_t offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3596 		metaslab_t *msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
3597 
3598 		/*
3599 		 * This is not very efficient but it's easy to
3600 		 * verify correctness.
3601 		 */
3602 		for (uint64_t inner_offset = 0;
3603 		    inner_offset < DVA_GET_ASIZE(&vimep->vimep_dst);
3604 		    inner_offset += 1 << vd->vdev_ashift) {
3605 			if (range_tree_contains(msp->ms_allocatable,
3606 			    offset + inner_offset, 1 << vd->vdev_ashift)) {
3607 				obsolete_bytes += 1 << vd->vdev_ashift;
3608 			}
3609 		}
3610 
3611 		int64_t bytes_leaked = obsolete_bytes -
3612 		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i];
3613 		ASSERT3U(DVA_GET_ASIZE(&vimep->vimep_dst), >=,
3614 		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i]);
3615 		if (bytes_leaked != 0 &&
3616 		    (vdev_obsolete_counts_are_precise(vd) ||
3617 		    dump_opt['d'] >= 5)) {
3618 			(void) printf("obsolete indirect mapping count "
3619 			    "mismatch on %llu:%llx:%llx : %llx bytes leaked\n",
3620 			    (u_longlong_t)vd->vdev_id,
3621 			    (u_longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
3622 			    (u_longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
3623 			    (u_longlong_t)bytes_leaked);
3624 		}
3625 		total_leaked += ABS(bytes_leaked);
3626 	}
3627 
3628 	if (!vdev_obsolete_counts_are_precise(vd) && total_leaked > 0) {
3629 		int pct_leaked = total_leaked * 100 /
3630 		    vdev_indirect_mapping_bytes_mapped(vim);
3631 		(void) printf("cannot verify obsolete indirect mapping "
3632 		    "counts of vdev %llu because precise feature was not "
3633 		    "enabled when it was removed: %d%% (%llx bytes) of mapping"
3634 		    "unreferenced\n",
3635 		    (u_longlong_t)vd->vdev_id, pct_leaked,
3636 		    (u_longlong_t)total_leaked);
3637 	} else if (total_leaked > 0) {
3638 		(void) printf("obsolete indirect mapping count mismatch "
3639 		    "for vdev %llu -- %llx total bytes mismatched\n",
3640 		    (u_longlong_t)vd->vdev_id,
3641 		    (u_longlong_t)total_leaked);
3642 		leaks |= B_TRUE;
3643 	}
3644 
3645 	vdev_indirect_mapping_free_obsolete_counts(vim,
3646 	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3647 	zcb->zcb_vd_obsolete_counts[vd->vdev_id] = NULL;
3648 
3649 	return (leaks);
3650 }
3651 
3652 static boolean_t
3653 zdb_leak_fini(spa_t *spa, zdb_cb_t *zcb)
3654 {
3655 	if (dump_opt['L'])
3656 		return (B_FALSE);
3657 
3658 	boolean_t leaks = B_FALSE;
3659 
3660 	vdev_t *rvd = spa->spa_root_vdev;
3661 	for (unsigned c = 0; c < rvd->vdev_children; c++) {
3662 		vdev_t *vd = rvd->vdev_child[c];
3663 #if DEBUG
3664 		metaslab_group_t *mg = vd->vdev_mg;
3665 #endif
3666 
3667 		if (zcb->zcb_vd_obsolete_counts[c] != NULL) {
3668 			leaks |= zdb_check_for_obsolete_leaks(vd, zcb);
3669 		}
3670 
3671 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3672 			metaslab_t *msp = vd->vdev_ms[m];
3673 			ASSERT3P(mg, ==, msp->ms_group);
3674 
3675 			/*
3676 			 * ms_allocatable has been overloaded
3677 			 * to contain allocated segments. Now that
3678 			 * we finished traversing all blocks, any
3679 			 * block that remains in the ms_allocatable
3680 			 * represents an allocated block that we
3681 			 * did not claim during the traversal.
3682 			 * Claimed blocks would have been removed
3683 			 * from the ms_allocatable.  For indirect
3684 			 * vdevs, space remaining in the tree
3685 			 * represents parts of the mapping that are
3686 			 * not referenced, which is not a bug.
3687 			 */
3688 			if (vd->vdev_ops == &vdev_indirect_ops) {
3689 				range_tree_vacate(msp->ms_allocatable,
3690 				    NULL, NULL);
3691 			} else {
3692 				range_tree_vacate(msp->ms_allocatable,
3693 				    zdb_leak, vd);
3694 			}
3695 
3696 			if (msp->ms_loaded) {
3697 				msp->ms_loaded = B_FALSE;
3698 			}
3699 		}
3700 
3701 	}
3702 
3703 	umem_free(zcb->zcb_vd_obsolete_counts,
3704 	    rvd->vdev_children * sizeof (uint32_t *));
3705 	zcb->zcb_vd_obsolete_counts = NULL;
3706 
3707 	return (leaks);
3708 }
3709 
3710 /* ARGSUSED */
3711 static int
3712 count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3713 {
3714 	zdb_cb_t *zcb = arg;
3715 
3716 	if (dump_opt['b'] >= 5) {
3717 		char blkbuf[BP_SPRINTF_LEN];
3718 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3719 		(void) printf("[%s] %s\n",
3720 		    "deferred free", blkbuf);
3721 	}
3722 	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
3723 	return (0);
3724 }
3725 
3726 static int
3727 dump_block_stats(spa_t *spa)
3728 {
3729 	zdb_cb_t zcb;
3730 	zdb_blkstats_t *zb, *tzb;
3731 	uint64_t norm_alloc, norm_space, total_alloc, total_found;
3732 	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
3733 	boolean_t leaks = B_FALSE;
3734 	int err;
3735 
3736 	bzero(&zcb, sizeof (zcb));
3737 	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
3738 	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
3739 	    (dump_opt['c'] == 1) ? "metadata " : "",
3740 	    dump_opt['c'] ? "checksums " : "",
3741 	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
3742 	    !dump_opt['L'] ? "nothing leaked " : "");
3743 
3744 	/*
3745 	 * When leak detection is enabled we load all space maps as SM_ALLOC
3746 	 * maps, then traverse the pool claiming each block we discover. If
3747 	 * the pool is perfectly consistent, the segment trees will be empty
3748 	 * when we're done. Anything left over is a leak; any block we can't
3749 	 * claim (because it's not part of any space map) is a double
3750 	 * allocation, reference to a freed block, or an unclaimed log block.
3751 	 *
3752 	 * When leak detection is disabled (-L option) we still traverse the
3753 	 * pool claiming each block we discover, but we skip opening any space
3754 	 * maps.
3755 	 */
3756 	bzero(&zcb, sizeof (zdb_cb_t));
3757 	zdb_leak_init(spa, &zcb);
3758 
3759 	/*
3760 	 * If there's a deferred-free bplist, process that first.
3761 	 */
3762 	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
3763 	    count_block_cb, &zcb, NULL);
3764 
3765 	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
3766 		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
3767 		    count_block_cb, &zcb, NULL);
3768 	}
3769 
3770 	zdb_claim_removing(spa, &zcb);
3771 
3772 	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
3773 		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
3774 		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
3775 		    &zcb, NULL));
3776 	}
3777 
3778 	if (dump_opt['c'] > 1)
3779 		flags |= TRAVERSE_PREFETCH_DATA;
3780 
3781 	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
3782 	zcb.zcb_totalasize += metaslab_class_get_alloc(spa_special_class(spa));
3783 	zcb.zcb_totalasize += metaslab_class_get_alloc(spa_dedup_class(spa));
3784 	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
3785 	err = traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
3786 
3787 	/*
3788 	 * If we've traversed the data blocks then we need to wait for those
3789 	 * I/Os to complete. We leverage "The Godfather" zio to wait on
3790 	 * all async I/Os to complete.
3791 	 */
3792 	if (dump_opt['c']) {
3793 		for (int i = 0; i < max_ncpus; i++) {
3794 			(void) zio_wait(spa->spa_async_zio_root[i]);
3795 			spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
3796 			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
3797 			    ZIO_FLAG_GODFATHER);
3798 		}
3799 	}
3800 
3801 	/*
3802 	 * Done after zio_wait() since zcb_haderrors is modified in
3803 	 * zdb_blkptr_done()
3804 	 */
3805 	zcb.zcb_haderrors |= err;
3806 
3807 	if (zcb.zcb_haderrors) {
3808 		(void) printf("\nError counts:\n\n");
3809 		(void) printf("\t%5s  %s\n", "errno", "count");
3810 		for (int e = 0; e < 256; e++) {
3811 			if (zcb.zcb_errors[e] != 0) {
3812 				(void) printf("\t%5d  %llu\n",
3813 				    e, (u_longlong_t)zcb.zcb_errors[e]);
3814 			}
3815 		}
3816 	}
3817 
3818 	/*
3819 	 * Report any leaked segments.
3820 	 */
3821 	leaks |= zdb_leak_fini(spa, &zcb);
3822 
3823 	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
3824 
3825 	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
3826 	norm_space = metaslab_class_get_space(spa_normal_class(spa));
3827 
3828 	total_alloc = norm_alloc +
3829 	    metaslab_class_get_alloc(spa_log_class(spa)) +
3830 	    metaslab_class_get_alloc(spa_special_class(spa)) +
3831 	    metaslab_class_get_alloc(spa_dedup_class(spa));
3832 	total_found = tzb->zb_asize - zcb.zcb_dedup_asize +
3833 	    zcb.zcb_removing_size + zcb.zcb_checkpoint_size;
3834 
3835 	if (total_found == total_alloc && !dump_opt['L']) {
3836 		(void) printf("\n\tNo leaks (block sum matches space"
3837 		    " maps exactly)\n");
3838 	} else if (!dump_opt['L']) {
3839 		(void) printf("block traversal size %llu != alloc %llu "
3840 		    "(%s %lld)\n",
3841 		    (u_longlong_t)total_found,
3842 		    (u_longlong_t)total_alloc,
3843 		    (dump_opt['L']) ? "unreachable" : "leaked",
3844 		    (longlong_t)(total_alloc - total_found));
3845 		leaks = B_TRUE;
3846 	}
3847 
3848 	if (tzb->zb_count == 0)
3849 		return (2);
3850 
3851 	(void) printf("\n");
3852 	(void) printf("\t%-16s %14llu\n", "bp count:",
3853 	    (u_longlong_t)tzb->zb_count);
3854 	(void) printf("\t%-16s %14llu\n", "ganged count:",
3855 	    (longlong_t)tzb->zb_gangs);
3856 	(void) printf("\t%-16s %14llu      avg: %6llu\n", "bp logical:",
3857 	    (u_longlong_t)tzb->zb_lsize,
3858 	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
3859 	(void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
3860 	    "bp physical:", (u_longlong_t)tzb->zb_psize,
3861 	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
3862 	    (double)tzb->zb_lsize / tzb->zb_psize);
3863 	(void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
3864 	    "bp allocated:", (u_longlong_t)tzb->zb_asize,
3865 	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
3866 	    (double)tzb->zb_lsize / tzb->zb_asize);
3867 	(void) printf("\t%-16s %14llu    ref>1: %6llu   deduplication: %6.2f\n",
3868 	    "bp deduped:", (u_longlong_t)zcb.zcb_dedup_asize,
3869 	    (u_longlong_t)zcb.zcb_dedup_blocks,
3870 	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
3871 	(void) printf("\t%-16s %14llu     used: %5.2f%%\n", "Normal class:",
3872 	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
3873 
3874 	if (spa_special_class(spa)->mc_rotor != NULL) {
3875 		uint64_t alloc = metaslab_class_get_alloc(
3876 		    spa_special_class(spa));
3877 		uint64_t space = metaslab_class_get_space(
3878 		    spa_special_class(spa));
3879 
3880 		(void) printf("\t%-16s %14llu     used: %5.2f%%\n",
3881 		    "Special class", (u_longlong_t)alloc,
3882 		    100.0 * alloc / space);
3883 	}
3884 
3885 	if (spa_dedup_class(spa)->mc_rotor != NULL) {
3886 		uint64_t alloc = metaslab_class_get_alloc(
3887 		    spa_dedup_class(spa));
3888 		uint64_t space = metaslab_class_get_space(
3889 		    spa_dedup_class(spa));
3890 
3891 		(void) printf("\t%-16s %14llu     used: %5.2f%%\n",
3892 		    "Dedup class", (u_longlong_t)alloc,
3893 		    100.0 * alloc / space);
3894 	}
3895 
3896 	for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
3897 		if (zcb.zcb_embedded_blocks[i] == 0)
3898 			continue;
3899 		(void) printf("\n");
3900 		(void) printf("\tadditional, non-pointer bps of type %u: "
3901 		    "%10llu\n",
3902 		    i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
3903 
3904 		if (dump_opt['b'] >= 3) {
3905 			(void) printf("\t number of (compressed) bytes:  "
3906 			    "number of bps\n");
3907 			dump_histogram(zcb.zcb_embedded_histogram[i],
3908 			    sizeof (zcb.zcb_embedded_histogram[i]) /
3909 			    sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
3910 		}
3911 	}
3912 
3913 	if (tzb->zb_ditto_samevdev != 0) {
3914 		(void) printf("\tDittoed blocks on same vdev: %llu\n",
3915 		    (longlong_t)tzb->zb_ditto_samevdev);
3916 	}
3917 	if (tzb->zb_ditto_same_ms != 0) {
3918 		(void) printf("\tDittoed blocks in same metaslab: %llu\n",
3919 		    (longlong_t)tzb->zb_ditto_same_ms);
3920 	}
3921 
3922 	for (uint64_t v = 0; v < spa->spa_root_vdev->vdev_children; v++) {
3923 		vdev_t *vd = spa->spa_root_vdev->vdev_child[v];
3924 		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3925 
3926 		if (vim == NULL) {
3927 			continue;
3928 		}
3929 
3930 		char mem[32];
3931 		zdb_nicenum(vdev_indirect_mapping_num_entries(vim),
3932 		    mem, vdev_indirect_mapping_size(vim));
3933 
3934 		(void) printf("\tindirect vdev id %llu has %llu segments "
3935 		    "(%s in memory)\n",
3936 		    (longlong_t)vd->vdev_id,
3937 		    (longlong_t)vdev_indirect_mapping_num_entries(vim), mem);
3938 	}
3939 
3940 	if (dump_opt['b'] >= 2) {
3941 		int l, t, level;
3942 		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
3943 		    "\t  avg\t comp\t%%Total\tType\n");
3944 
3945 		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
3946 			char csize[32], lsize[32], psize[32], asize[32];
3947 			char avg[32], gang[32];
3948 			const char *typename;
3949 
3950 			/* make sure nicenum has enough space */
3951 			CTASSERT(sizeof (csize) >= NN_NUMBUF_SZ);
3952 			CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
3953 			CTASSERT(sizeof (psize) >= NN_NUMBUF_SZ);
3954 			CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
3955 			CTASSERT(sizeof (avg) >= NN_NUMBUF_SZ);
3956 			CTASSERT(sizeof (gang) >= NN_NUMBUF_SZ);
3957 
3958 			if (t < DMU_OT_NUMTYPES)
3959 				typename = dmu_ot[t].ot_name;
3960 			else
3961 				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
3962 
3963 			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
3964 				(void) printf("%6s\t%5s\t%5s\t%5s"
3965 				    "\t%5s\t%5s\t%6s\t%s\n",
3966 				    "-",
3967 				    "-",
3968 				    "-",
3969 				    "-",
3970 				    "-",
3971 				    "-",
3972 				    "-",
3973 				    typename);
3974 				continue;
3975 			}
3976 
3977 			for (l = ZB_TOTAL - 1; l >= -1; l--) {
3978 				level = (l == -1 ? ZB_TOTAL : l);
3979 				zb = &zcb.zcb_type[level][t];
3980 
3981 				if (zb->zb_asize == 0)
3982 					continue;
3983 
3984 				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
3985 					continue;
3986 
3987 				if (level == 0 && zb->zb_asize ==
3988 				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
3989 					continue;
3990 
3991 				zdb_nicenum(zb->zb_count, csize,
3992 				    sizeof (csize));
3993 				zdb_nicenum(zb->zb_lsize, lsize,
3994 				    sizeof (lsize));
3995 				zdb_nicenum(zb->zb_psize, psize,
3996 				    sizeof (psize));
3997 				zdb_nicenum(zb->zb_asize, asize,
3998 				    sizeof (asize));
3999 				zdb_nicenum(zb->zb_asize / zb->zb_count, avg,
4000 				    sizeof (avg));
4001 				zdb_nicenum(zb->zb_gangs, gang, sizeof (gang));
4002 
4003 				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
4004 				    "\t%5.2f\t%6.2f\t",
4005 				    csize, lsize, psize, asize, avg,
4006 				    (double)zb->zb_lsize / zb->zb_psize,
4007 				    100.0 * zb->zb_asize / tzb->zb_asize);
4008 
4009 				if (level == ZB_TOTAL)
4010 					(void) printf("%s\n", typename);
4011 				else
4012 					(void) printf("    L%d %s\n",
4013 					    level, typename);
4014 
4015 				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
4016 					(void) printf("\t number of ganged "
4017 					    "blocks: %s\n", gang);
4018 				}
4019 
4020 				if (dump_opt['b'] >= 4) {
4021 					(void) printf("psize "
4022 					    "(in 512-byte sectors): "
4023 					    "number of blocks\n");
4024 					dump_histogram(zb->zb_psize_histogram,
4025 					    PSIZE_HISTO_SIZE, 0);
4026 				}
4027 			}
4028 		}
4029 	}
4030 
4031 	(void) printf("\n");
4032 
4033 	if (leaks)
4034 		return (2);
4035 
4036 	if (zcb.zcb_haderrors)
4037 		return (3);
4038 
4039 	return (0);
4040 }
4041 
4042 typedef struct zdb_ddt_entry {
4043 	ddt_key_t	zdde_key;
4044 	uint64_t	zdde_ref_blocks;
4045 	uint64_t	zdde_ref_lsize;
4046 	uint64_t	zdde_ref_psize;
4047 	uint64_t	zdde_ref_dsize;
4048 	avl_node_t	zdde_node;
4049 } zdb_ddt_entry_t;
4050 
4051 /* ARGSUSED */
4052 static int
4053 zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
4054     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
4055 {
4056 	avl_tree_t *t = arg;
4057 	avl_index_t where;
4058 	zdb_ddt_entry_t *zdde, zdde_search;
4059 
4060 	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
4061 		return (0);
4062 
4063 	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
4064 		(void) printf("traversing objset %llu, %llu objects, "
4065 		    "%lu blocks so far\n",
4066 		    (u_longlong_t)zb->zb_objset,
4067 		    (u_longlong_t)BP_GET_FILL(bp),
4068 		    avl_numnodes(t));
4069 	}
4070 
4071 	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
4072 	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
4073 		return (0);
4074 
4075 	ddt_key_fill(&zdde_search.zdde_key, bp);
4076 
4077 	zdde = avl_find(t, &zdde_search, &where);
4078 
4079 	if (zdde == NULL) {
4080 		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
4081 		zdde->zdde_key = zdde_search.zdde_key;
4082 		avl_insert(t, zdde, where);
4083 	}
4084 
4085 	zdde->zdde_ref_blocks += 1;
4086 	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
4087 	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
4088 	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
4089 
4090 	return (0);
4091 }
4092 
4093 static void
4094 dump_simulated_ddt(spa_t *spa)
4095 {
4096 	avl_tree_t t;
4097 	void *cookie = NULL;
4098 	zdb_ddt_entry_t *zdde;
4099 	ddt_histogram_t ddh_total;
4100 	ddt_stat_t dds_total;
4101 
4102 	bzero(&ddh_total, sizeof (ddh_total));
4103 	bzero(&dds_total, sizeof (dds_total));
4104 	avl_create(&t, ddt_entry_compare,
4105 	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
4106 
4107 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4108 
4109 	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
4110 	    zdb_ddt_add_cb, &t);
4111 
4112 	spa_config_exit(spa, SCL_CONFIG, FTAG);
4113 
4114 	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
4115 		ddt_stat_t dds;
4116 		uint64_t refcnt = zdde->zdde_ref_blocks;
4117 		ASSERT(refcnt != 0);
4118 
4119 		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
4120 		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
4121 		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
4122 		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
4123 
4124 		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
4125 		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
4126 		dds.dds_ref_psize = zdde->zdde_ref_psize;
4127 		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
4128 
4129 		ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
4130 		    &dds, 0);
4131 
4132 		umem_free(zdde, sizeof (*zdde));
4133 	}
4134 
4135 	avl_destroy(&t);
4136 
4137 	ddt_histogram_stat(&dds_total, &ddh_total);
4138 
4139 	(void) printf("Simulated DDT histogram:\n");
4140 
4141 	zpool_dump_ddt(&dds_total, &ddh_total);
4142 
4143 	dump_dedup_ratio(&dds_total);
4144 }
4145 
4146 static int
4147 verify_device_removal_feature_counts(spa_t *spa)
4148 {
4149 	uint64_t dr_feature_refcount = 0;
4150 	uint64_t oc_feature_refcount = 0;
4151 	uint64_t indirect_vdev_count = 0;
4152 	uint64_t precise_vdev_count = 0;
4153 	uint64_t obsolete_counts_object_count = 0;
4154 	uint64_t obsolete_sm_count = 0;
4155 	uint64_t obsolete_counts_count = 0;
4156 	uint64_t scip_count = 0;
4157 	uint64_t obsolete_bpobj_count = 0;
4158 	int ret = 0;
4159 
4160 	spa_condensing_indirect_phys_t *scip =
4161 	    &spa->spa_condensing_indirect_phys;
4162 	if (scip->scip_next_mapping_object != 0) {
4163 		vdev_t *vd = spa->spa_root_vdev->vdev_child[scip->scip_vdev];
4164 		ASSERT(scip->scip_prev_obsolete_sm_object != 0);
4165 		ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops);
4166 
4167 		(void) printf("Condensing indirect vdev %llu: new mapping "
4168 		    "object %llu, prev obsolete sm %llu\n",
4169 		    (u_longlong_t)scip->scip_vdev,
4170 		    (u_longlong_t)scip->scip_next_mapping_object,
4171 		    (u_longlong_t)scip->scip_prev_obsolete_sm_object);
4172 		if (scip->scip_prev_obsolete_sm_object != 0) {
4173 			space_map_t *prev_obsolete_sm = NULL;
4174 			VERIFY0(space_map_open(&prev_obsolete_sm,
4175 			    spa->spa_meta_objset,
4176 			    scip->scip_prev_obsolete_sm_object,
4177 			    0, vd->vdev_asize, 0));
4178 			dump_spacemap(spa->spa_meta_objset, prev_obsolete_sm);
4179 			(void) printf("\n");
4180 			space_map_close(prev_obsolete_sm);
4181 		}
4182 
4183 		scip_count += 2;
4184 	}
4185 
4186 	for (uint64_t i = 0; i < spa->spa_root_vdev->vdev_children; i++) {
4187 		vdev_t *vd = spa->spa_root_vdev->vdev_child[i];
4188 		vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
4189 
4190 		if (vic->vic_mapping_object != 0) {
4191 			ASSERT(vd->vdev_ops == &vdev_indirect_ops ||
4192 			    vd->vdev_removing);
4193 			indirect_vdev_count++;
4194 
4195 			if (vd->vdev_indirect_mapping->vim_havecounts) {
4196 				obsolete_counts_count++;
4197 			}
4198 		}
4199 		if (vdev_obsolete_counts_are_precise(vd)) {
4200 			ASSERT(vic->vic_mapping_object != 0);
4201 			precise_vdev_count++;
4202 		}
4203 		if (vdev_obsolete_sm_object(vd) != 0) {
4204 			ASSERT(vic->vic_mapping_object != 0);
4205 			obsolete_sm_count++;
4206 		}
4207 	}
4208 
4209 	(void) feature_get_refcount(spa,
4210 	    &spa_feature_table[SPA_FEATURE_DEVICE_REMOVAL],
4211 	    &dr_feature_refcount);
4212 	(void) feature_get_refcount(spa,
4213 	    &spa_feature_table[SPA_FEATURE_OBSOLETE_COUNTS],
4214 	    &oc_feature_refcount);
4215 
4216 	if (dr_feature_refcount != indirect_vdev_count) {
4217 		ret = 1;
4218 		(void) printf("Number of indirect vdevs (%llu) " \
4219 		    "does not match feature count (%llu)\n",
4220 		    (u_longlong_t)indirect_vdev_count,
4221 		    (u_longlong_t)dr_feature_refcount);
4222 	} else {
4223 		(void) printf("Verified device_removal feature refcount " \
4224 		    "of %llu is correct\n",
4225 		    (u_longlong_t)dr_feature_refcount);
4226 	}
4227 
4228 	if (zap_contains(spa_meta_objset(spa), DMU_POOL_DIRECTORY_OBJECT,
4229 	    DMU_POOL_OBSOLETE_BPOBJ) == 0) {
4230 		obsolete_bpobj_count++;
4231 	}
4232 
4233 
4234 	obsolete_counts_object_count = precise_vdev_count;
4235 	obsolete_counts_object_count += obsolete_sm_count;
4236 	obsolete_counts_object_count += obsolete_counts_count;
4237 	obsolete_counts_object_count += scip_count;
4238 	obsolete_counts_object_count += obsolete_bpobj_count;
4239 	obsolete_counts_object_count += remap_deadlist_count;
4240 
4241 	if (oc_feature_refcount != obsolete_counts_object_count) {
4242 		ret = 1;
4243 		(void) printf("Number of obsolete counts objects (%llu) " \
4244 		    "does not match feature count (%llu)\n",
4245 		    (u_longlong_t)obsolete_counts_object_count,
4246 		    (u_longlong_t)oc_feature_refcount);
4247 		(void) printf("pv:%llu os:%llu oc:%llu sc:%llu "
4248 		    "ob:%llu rd:%llu\n",
4249 		    (u_longlong_t)precise_vdev_count,
4250 		    (u_longlong_t)obsolete_sm_count,
4251 		    (u_longlong_t)obsolete_counts_count,
4252 		    (u_longlong_t)scip_count,
4253 		    (u_longlong_t)obsolete_bpobj_count,
4254 		    (u_longlong_t)remap_deadlist_count);
4255 	} else {
4256 		(void) printf("Verified indirect_refcount feature refcount " \
4257 		    "of %llu is correct\n",
4258 		    (u_longlong_t)oc_feature_refcount);
4259 	}
4260 	return (ret);
4261 }
4262 
4263 static void
4264 zdb_set_skip_mmp(char *target)
4265 {
4266 	spa_t *spa;
4267 
4268 	/*
4269 	 * Disable the activity check to allow examination of
4270 	 * active pools.
4271 	 */
4272 	mutex_enter(&spa_namespace_lock);
4273 	if ((spa = spa_lookup(target)) != NULL) {
4274 		spa->spa_import_flags |= ZFS_IMPORT_SKIP_MMP;
4275 	}
4276 	mutex_exit(&spa_namespace_lock);
4277 }
4278 
4279 #define	BOGUS_SUFFIX "_CHECKPOINTED_UNIVERSE"
4280 /*
4281  * Import the checkpointed state of the pool specified by the target
4282  * parameter as readonly. The function also accepts a pool config
4283  * as an optional parameter, else it attempts to infer the config by
4284  * the name of the target pool.
4285  *
4286  * Note that the checkpointed state's pool name will be the name of
4287  * the original pool with the above suffix appened to it. In addition,
4288  * if the target is not a pool name (e.g. a path to a dataset) then
4289  * the new_path parameter is populated with the updated path to
4290  * reflect the fact that we are looking into the checkpointed state.
4291  *
4292  * The function returns a newly-allocated copy of the name of the
4293  * pool containing the checkpointed state. When this copy is no
4294  * longer needed it should be freed with free(3C). Same thing
4295  * applies to the new_path parameter if allocated.
4296  */
4297 static char *
4298 import_checkpointed_state(char *target, nvlist_t *cfg, char **new_path)
4299 {
4300 	int error = 0;
4301 	char *poolname, *bogus_name;
4302 
4303 	/* If the target is not a pool, the extract the pool name */
4304 	char *path_start = strchr(target, '/');
4305 	if (path_start != NULL) {
4306 		size_t poolname_len = path_start - target;
4307 		poolname = strndup(target, poolname_len);
4308 	} else {
4309 		poolname = target;
4310 	}
4311 
4312 	if (cfg == NULL) {
4313 		zdb_set_skip_mmp(poolname);
4314 		error = spa_get_stats(poolname, &cfg, NULL, 0);
4315 		if (error != 0) {
4316 			fatal("Tried to read config of pool \"%s\" but "
4317 			    "spa_get_stats() failed with error %d\n",
4318 			    poolname, error);
4319 		}
4320 	}
4321 
4322 	(void) asprintf(&bogus_name, "%s%s", poolname, BOGUS_SUFFIX);
4323 	fnvlist_add_string(cfg, ZPOOL_CONFIG_POOL_NAME, bogus_name);
4324 
4325 	error = spa_import(bogus_name, cfg, NULL,
4326 	    ZFS_IMPORT_MISSING_LOG | ZFS_IMPORT_CHECKPOINT |
4327 	    ZFS_IMPORT_SKIP_MMP);
4328 	if (error != 0) {
4329 		fatal("Tried to import pool \"%s\" but spa_import() failed "
4330 		    "with error %d\n", bogus_name, error);
4331 	}
4332 
4333 	if (new_path != NULL && path_start != NULL)
4334 		(void) asprintf(new_path, "%s%s", bogus_name, path_start);
4335 
4336 	if (target != poolname)
4337 		free(poolname);
4338 
4339 	return (bogus_name);
4340 }
4341 
4342 typedef struct verify_checkpoint_sm_entry_cb_arg {
4343 	vdev_t *vcsec_vd;
4344 
4345 	/* the following fields are only used for printing progress */
4346 	uint64_t vcsec_entryid;
4347 	uint64_t vcsec_num_entries;
4348 } verify_checkpoint_sm_entry_cb_arg_t;
4349 
4350 #define	ENTRIES_PER_PROGRESS_UPDATE 10000
4351 
4352 static int
4353 verify_checkpoint_sm_entry_cb(space_map_entry_t *sme, void *arg)
4354 {
4355 	verify_checkpoint_sm_entry_cb_arg_t *vcsec = arg;
4356 	vdev_t *vd = vcsec->vcsec_vd;
4357 	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
4358 	uint64_t end = sme->sme_offset + sme->sme_run;
4359 
4360 	ASSERT(sme->sme_type == SM_FREE);
4361 
4362 	if ((vcsec->vcsec_entryid % ENTRIES_PER_PROGRESS_UPDATE) == 0) {
4363 		(void) fprintf(stderr,
4364 		    "\rverifying vdev %llu, space map entry %llu of %llu ...",
4365 		    (longlong_t)vd->vdev_id,
4366 		    (longlong_t)vcsec->vcsec_entryid,
4367 		    (longlong_t)vcsec->vcsec_num_entries);
4368 	}
4369 	vcsec->vcsec_entryid++;
4370 
4371 	/*
4372 	 * See comment in checkpoint_sm_exclude_entry_cb()
4373 	 */
4374 	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
4375 	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
4376 
4377 	/*
4378 	 * The entries in the vdev_checkpoint_sm should be marked as
4379 	 * allocated in the checkpointed state of the pool, therefore
4380 	 * their respective ms_allocateable trees should not contain them.
4381 	 */
4382 	mutex_enter(&ms->ms_lock);
4383 	range_tree_verify_not_present(ms->ms_allocatable,
4384 	    sme->sme_offset, sme->sme_run);
4385 	mutex_exit(&ms->ms_lock);
4386 
4387 	return (0);
4388 }
4389 
4390 /*
4391  * Verify that all segments in the vdev_checkpoint_sm are allocated
4392  * according to the checkpoint's ms_sm (i.e. are not in the checkpoint's
4393  * ms_allocatable).
4394  *
4395  * Do so by comparing the checkpoint space maps (vdev_checkpoint_sm) of
4396  * each vdev in the current state of the pool to the metaslab space maps
4397  * (ms_sm) of the checkpointed state of the pool.
4398  *
4399  * Note that the function changes the state of the ms_allocatable
4400  * trees of the current spa_t. The entries of these ms_allocatable
4401  * trees are cleared out and then repopulated from with the free
4402  * entries of their respective ms_sm space maps.
4403  */
4404 static void
4405 verify_checkpoint_vdev_spacemaps(spa_t *checkpoint, spa_t *current)
4406 {
4407 	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4408 	vdev_t *current_rvd = current->spa_root_vdev;
4409 
4410 	load_concrete_ms_allocatable_trees(checkpoint, SM_FREE);
4411 
4412 	for (uint64_t c = 0; c < ckpoint_rvd->vdev_children; c++) {
4413 		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[c];
4414 		vdev_t *current_vd = current_rvd->vdev_child[c];
4415 
4416 		space_map_t *checkpoint_sm = NULL;
4417 		uint64_t checkpoint_sm_obj;
4418 
4419 		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4420 			/*
4421 			 * Since we don't allow device removal in a pool
4422 			 * that has a checkpoint, we expect that all removed
4423 			 * vdevs were removed from the pool before the
4424 			 * checkpoint.
4425 			 */
4426 			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4427 			continue;
4428 		}
4429 
4430 		/*
4431 		 * If the checkpoint space map doesn't exist, then nothing
4432 		 * here is checkpointed so there's nothing to verify.
4433 		 */
4434 		if (current_vd->vdev_top_zap == 0 ||
4435 		    zap_contains(spa_meta_objset(current),
4436 		    current_vd->vdev_top_zap,
4437 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4438 			continue;
4439 
4440 		VERIFY0(zap_lookup(spa_meta_objset(current),
4441 		    current_vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4442 		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4443 
4444 		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(current),
4445 		    checkpoint_sm_obj, 0, current_vd->vdev_asize,
4446 		    current_vd->vdev_ashift));
4447 
4448 		verify_checkpoint_sm_entry_cb_arg_t vcsec;
4449 		vcsec.vcsec_vd = ckpoint_vd;
4450 		vcsec.vcsec_entryid = 0;
4451 		vcsec.vcsec_num_entries =
4452 		    space_map_length(checkpoint_sm) / sizeof (uint64_t);
4453 		VERIFY0(space_map_iterate(checkpoint_sm,
4454 		    space_map_length(checkpoint_sm),
4455 		    verify_checkpoint_sm_entry_cb, &vcsec));
4456 		dump_spacemap(current->spa_meta_objset, checkpoint_sm);
4457 		space_map_close(checkpoint_sm);
4458 	}
4459 
4460 	/*
4461 	 * If we've added vdevs since we took the checkpoint, ensure
4462 	 * that their checkpoint space maps are empty.
4463 	 */
4464 	if (ckpoint_rvd->vdev_children < current_rvd->vdev_children) {
4465 		for (uint64_t c = ckpoint_rvd->vdev_children;
4466 		    c < current_rvd->vdev_children; c++) {
4467 			vdev_t *current_vd = current_rvd->vdev_child[c];
4468 			ASSERT3P(current_vd->vdev_checkpoint_sm, ==, NULL);
4469 		}
4470 	}
4471 
4472 	/* for cleaner progress output */
4473 	(void) fprintf(stderr, "\n");
4474 }
4475 
4476 /*
4477  * Verifies that all space that's allocated in the checkpoint is
4478  * still allocated in the current version, by checking that everything
4479  * in checkpoint's ms_allocatable (which is actually allocated, not
4480  * allocatable/free) is not present in current's ms_allocatable.
4481  *
4482  * Note that the function changes the state of the ms_allocatable
4483  * trees of both spas when called. The entries of all ms_allocatable
4484  * trees are cleared out and then repopulated from their respective
4485  * ms_sm space maps. In the checkpointed state we load the allocated
4486  * entries, and in the current state we load the free entries.
4487  */
4488 static void
4489 verify_checkpoint_ms_spacemaps(spa_t *checkpoint, spa_t *current)
4490 {
4491 	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4492 	vdev_t *current_rvd = current->spa_root_vdev;
4493 
4494 	load_concrete_ms_allocatable_trees(checkpoint, SM_ALLOC);
4495 	load_concrete_ms_allocatable_trees(current, SM_FREE);
4496 
4497 	for (uint64_t i = 0; i < ckpoint_rvd->vdev_children; i++) {
4498 		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[i];
4499 		vdev_t *current_vd = current_rvd->vdev_child[i];
4500 
4501 		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4502 			/*
4503 			 * See comment in verify_checkpoint_vdev_spacemaps()
4504 			 */
4505 			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4506 			continue;
4507 		}
4508 
4509 		for (uint64_t m = 0; m < ckpoint_vd->vdev_ms_count; m++) {
4510 			metaslab_t *ckpoint_msp = ckpoint_vd->vdev_ms[m];
4511 			metaslab_t *current_msp = current_vd->vdev_ms[m];
4512 
4513 			(void) fprintf(stderr,
4514 			    "\rverifying vdev %llu of %llu, "
4515 			    "metaslab %llu of %llu ...",
4516 			    (longlong_t)current_vd->vdev_id,
4517 			    (longlong_t)current_rvd->vdev_children,
4518 			    (longlong_t)current_vd->vdev_ms[m]->ms_id,
4519 			    (longlong_t)current_vd->vdev_ms_count);
4520 
4521 			/*
4522 			 * We walk through the ms_allocatable trees that
4523 			 * are loaded with the allocated blocks from the
4524 			 * ms_sm spacemaps of the checkpoint. For each
4525 			 * one of these ranges we ensure that none of them
4526 			 * exists in the ms_allocatable trees of the
4527 			 * current state which are loaded with the ranges
4528 			 * that are currently free.
4529 			 *
4530 			 * This way we ensure that none of the blocks that
4531 			 * are part of the checkpoint were freed by mistake.
4532 			 */
4533 			range_tree_walk(ckpoint_msp->ms_allocatable,
4534 			    (range_tree_func_t *)range_tree_verify_not_present,
4535 			    current_msp->ms_allocatable);
4536 		}
4537 	}
4538 
4539 	/* for cleaner progress output */
4540 	(void) fprintf(stderr, "\n");
4541 }
4542 
4543 static void
4544 verify_checkpoint_blocks(spa_t *spa)
4545 {
4546 	ASSERT(!dump_opt['L']);
4547 
4548 	spa_t *checkpoint_spa;
4549 	char *checkpoint_pool;
4550 	nvlist_t *config = NULL;
4551 	int error = 0;
4552 
4553 	/*
4554 	 * We import the checkpointed state of the pool (under a different
4555 	 * name) so we can do verification on it against the current state
4556 	 * of the pool.
4557 	 */
4558 	checkpoint_pool = import_checkpointed_state(spa->spa_name, config,
4559 	    NULL);
4560 	ASSERT(strcmp(spa->spa_name, checkpoint_pool) != 0);
4561 
4562 	error = spa_open(checkpoint_pool, &checkpoint_spa, FTAG);
4563 	if (error != 0) {
4564 		fatal("Tried to open pool \"%s\" but spa_open() failed with "
4565 		    "error %d\n", checkpoint_pool, error);
4566 	}
4567 
4568 	/*
4569 	 * Ensure that ranges in the checkpoint space maps of each vdev
4570 	 * are allocated according to the checkpointed state's metaslab
4571 	 * space maps.
4572 	 */
4573 	verify_checkpoint_vdev_spacemaps(checkpoint_spa, spa);
4574 
4575 	/*
4576 	 * Ensure that allocated ranges in the checkpoint's metaslab
4577 	 * space maps remain allocated in the metaslab space maps of
4578 	 * the current state.
4579 	 */
4580 	verify_checkpoint_ms_spacemaps(checkpoint_spa, spa);
4581 
4582 	/*
4583 	 * Once we are done, we get rid of the checkpointed state.
4584 	 */
4585 	spa_close(checkpoint_spa, FTAG);
4586 	free(checkpoint_pool);
4587 }
4588 
4589 static void
4590 dump_leftover_checkpoint_blocks(spa_t *spa)
4591 {
4592 	vdev_t *rvd = spa->spa_root_vdev;
4593 
4594 	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
4595 		vdev_t *vd = rvd->vdev_child[i];
4596 
4597 		space_map_t *checkpoint_sm = NULL;
4598 		uint64_t checkpoint_sm_obj;
4599 
4600 		if (vd->vdev_top_zap == 0)
4601 			continue;
4602 
4603 		if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
4604 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4605 			continue;
4606 
4607 		VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
4608 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4609 		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
4610 
4611 		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
4612 		    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
4613 		dump_spacemap(spa->spa_meta_objset, checkpoint_sm);
4614 		space_map_close(checkpoint_sm);
4615 	}
4616 }
4617 
4618 static int
4619 verify_checkpoint(spa_t *spa)
4620 {
4621 	uberblock_t checkpoint;
4622 	int error;
4623 
4624 	if (!spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT))
4625 		return (0);
4626 
4627 	error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
4628 	    DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t),
4629 	    sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint);
4630 
4631 	if (error == ENOENT && !dump_opt['L']) {
4632 		/*
4633 		 * If the feature is active but the uberblock is missing
4634 		 * then we must be in the middle of discarding the
4635 		 * checkpoint.
4636 		 */
4637 		(void) printf("\nPartially discarded checkpoint "
4638 		    "state found:\n");
4639 		dump_leftover_checkpoint_blocks(spa);
4640 		return (0);
4641 	} else if (error != 0) {
4642 		(void) printf("lookup error %d when looking for "
4643 		    "checkpointed uberblock in MOS\n", error);
4644 		return (error);
4645 	}
4646 	dump_uberblock(&checkpoint, "\nCheckpointed uberblock found:\n", "\n");
4647 
4648 	if (checkpoint.ub_checkpoint_txg == 0) {
4649 		(void) printf("\nub_checkpoint_txg not set in checkpointed "
4650 		    "uberblock\n");
4651 		error = 3;
4652 	}
4653 
4654 	if (error == 0 && !dump_opt['L'])
4655 		verify_checkpoint_blocks(spa);
4656 
4657 	return (error);
4658 }
4659 
4660 /* ARGSUSED */
4661 static void
4662 mos_leaks_cb(void *arg, uint64_t start, uint64_t size)
4663 {
4664 	for (uint64_t i = start; i < size; i++) {
4665 		(void) printf("MOS object %llu referenced but not allocated\n",
4666 		    (u_longlong_t)i);
4667 	}
4668 }
4669 
4670 static range_tree_t *mos_refd_objs;
4671 
4672 static void
4673 mos_obj_refd(uint64_t obj)
4674 {
4675 	if (obj != 0 && mos_refd_objs != NULL)
4676 		range_tree_add(mos_refd_objs, obj, 1);
4677 }
4678 
4679 static void
4680 mos_leak_vdev(vdev_t *vd)
4681 {
4682 	mos_obj_refd(vd->vdev_dtl_object);
4683 	mos_obj_refd(vd->vdev_ms_array);
4684 	mos_obj_refd(vd->vdev_top_zap);
4685 	mos_obj_refd(vd->vdev_indirect_config.vic_births_object);
4686 	mos_obj_refd(vd->vdev_indirect_config.vic_mapping_object);
4687 	mos_obj_refd(vd->vdev_leaf_zap);
4688 	if (vd->vdev_checkpoint_sm != NULL)
4689 		mos_obj_refd(vd->vdev_checkpoint_sm->sm_object);
4690 	if (vd->vdev_indirect_mapping != NULL) {
4691 		mos_obj_refd(vd->vdev_indirect_mapping->
4692 		    vim_phys->vimp_counts_object);
4693 	}
4694 	if (vd->vdev_obsolete_sm != NULL)
4695 		mos_obj_refd(vd->vdev_obsolete_sm->sm_object);
4696 
4697 	for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
4698 		metaslab_t *ms = vd->vdev_ms[m];
4699 		mos_obj_refd(space_map_object(ms->ms_sm));
4700 	}
4701 
4702 	for (uint64_t c = 0; c < vd->vdev_children; c++) {
4703 		mos_leak_vdev(vd->vdev_child[c]);
4704 	}
4705 }
4706 
4707 static int
4708 dump_mos_leaks(spa_t *spa)
4709 {
4710 	int rv = 0;
4711 	objset_t *mos = spa->spa_meta_objset;
4712 	dsl_pool_t *dp = spa->spa_dsl_pool;
4713 
4714 	/* Visit and mark all referenced objects in the MOS */
4715 
4716 	mos_obj_refd(DMU_POOL_DIRECTORY_OBJECT);
4717 	mos_obj_refd(spa->spa_pool_props_object);
4718 	mos_obj_refd(spa->spa_config_object);
4719 	mos_obj_refd(spa->spa_ddt_stat_object);
4720 	mos_obj_refd(spa->spa_feat_desc_obj);
4721 	mos_obj_refd(spa->spa_feat_enabled_txg_obj);
4722 	mos_obj_refd(spa->spa_feat_for_read_obj);
4723 	mos_obj_refd(spa->spa_feat_for_write_obj);
4724 	mos_obj_refd(spa->spa_history);
4725 	mos_obj_refd(spa->spa_errlog_last);
4726 	mos_obj_refd(spa->spa_errlog_scrub);
4727 	mos_obj_refd(spa->spa_all_vdev_zaps);
4728 	mos_obj_refd(spa->spa_dsl_pool->dp_bptree_obj);
4729 	mos_obj_refd(spa->spa_dsl_pool->dp_tmp_userrefs_obj);
4730 	mos_obj_refd(spa->spa_dsl_pool->dp_scan->scn_phys.scn_queue_obj);
4731 	bpobj_count_refd(&spa->spa_deferred_bpobj);
4732 	mos_obj_refd(dp->dp_empty_bpobj);
4733 	bpobj_count_refd(&dp->dp_obsolete_bpobj);
4734 	bpobj_count_refd(&dp->dp_free_bpobj);
4735 	mos_obj_refd(spa->spa_l2cache.sav_object);
4736 	mos_obj_refd(spa->spa_spares.sav_object);
4737 
4738 	mos_obj_refd(spa->spa_condensing_indirect_phys.
4739 	    scip_next_mapping_object);
4740 	mos_obj_refd(spa->spa_condensing_indirect_phys.
4741 	    scip_prev_obsolete_sm_object);
4742 	if (spa->spa_condensing_indirect_phys.scip_next_mapping_object != 0) {
4743 		vdev_indirect_mapping_t *vim =
4744 		    vdev_indirect_mapping_open(mos,
4745 		    spa->spa_condensing_indirect_phys.scip_next_mapping_object);
4746 		mos_obj_refd(vim->vim_phys->vimp_counts_object);
4747 		vdev_indirect_mapping_close(vim);
4748 	}
4749 
4750 	if (dp->dp_origin_snap != NULL) {
4751 		dsl_dataset_t *ds;
4752 
4753 		dsl_pool_config_enter(dp, FTAG);
4754 		VERIFY0(dsl_dataset_hold_obj(dp,
4755 		    dsl_dataset_phys(dp->dp_origin_snap)->ds_next_snap_obj,
4756 		    FTAG, &ds));
4757 		count_ds_mos_objects(ds);
4758 		dump_deadlist(&ds->ds_deadlist);
4759 		dsl_dataset_rele(ds, FTAG);
4760 		dsl_pool_config_exit(dp, FTAG);
4761 
4762 		count_ds_mos_objects(dp->dp_origin_snap);
4763 		dump_deadlist(&dp->dp_origin_snap->ds_deadlist);
4764 	}
4765 	count_dir_mos_objects(dp->dp_mos_dir);
4766 	if (dp->dp_free_dir != NULL)
4767 		count_dir_mos_objects(dp->dp_free_dir);
4768 	if (dp->dp_leak_dir != NULL)
4769 		count_dir_mos_objects(dp->dp_leak_dir);
4770 
4771 	mos_leak_vdev(spa->spa_root_vdev);
4772 
4773 	for (uint64_t class = 0; class < DDT_CLASSES; class++) {
4774 		for (uint64_t type = 0; type < DDT_TYPES; type++) {
4775 			for (uint64_t cksum = 0;
4776 			    cksum < ZIO_CHECKSUM_FUNCTIONS; cksum++) {
4777 				ddt_t *ddt = spa->spa_ddt[cksum];
4778 				mos_obj_refd(ddt->ddt_object[type][class]);
4779 			}
4780 		}
4781 	}
4782 
4783 	/*
4784 	 * Visit all allocated objects and make sure they are referenced.
4785 	 */
4786 	uint64_t object = 0;
4787 	while (dmu_object_next(mos, &object, B_FALSE, 0) == 0) {
4788 		if (range_tree_contains(mos_refd_objs, object, 1)) {
4789 			range_tree_remove(mos_refd_objs, object, 1);
4790 		} else {
4791 			dmu_object_info_t doi;
4792 			const char *name;
4793 			dmu_object_info(mos, object, &doi);
4794 			if (doi.doi_type & DMU_OT_NEWTYPE) {
4795 				dmu_object_byteswap_t bswap =
4796 				    DMU_OT_BYTESWAP(doi.doi_type);
4797 				name = dmu_ot_byteswap[bswap].ob_name;
4798 			} else {
4799 				name = dmu_ot[doi.doi_type].ot_name;
4800 			}
4801 
4802 			(void) printf("MOS object %llu (%s) leaked\n",
4803 			    (u_longlong_t)object, name);
4804 			rv = 2;
4805 		}
4806 	}
4807 	(void) range_tree_walk(mos_refd_objs, mos_leaks_cb, NULL);
4808 	if (!range_tree_is_empty(mos_refd_objs))
4809 		rv = 2;
4810 	range_tree_vacate(mos_refd_objs, NULL, NULL);
4811 	range_tree_destroy(mos_refd_objs);
4812 	return (rv);
4813 }
4814 
4815 static void
4816 dump_zpool(spa_t *spa)
4817 {
4818 	dsl_pool_t *dp = spa_get_dsl(spa);
4819 	int rc = 0;
4820 
4821 	if (dump_opt['S']) {
4822 		dump_simulated_ddt(spa);
4823 		return;
4824 	}
4825 
4826 	if (!dump_opt['e'] && dump_opt['C'] > 1) {
4827 		(void) printf("\nCached configuration:\n");
4828 		dump_nvlist(spa->spa_config, 8);
4829 	}
4830 
4831 	if (dump_opt['C'])
4832 		dump_config(spa);
4833 
4834 	if (dump_opt['u'])
4835 		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
4836 
4837 	if (dump_opt['D'])
4838 		dump_all_ddts(spa);
4839 
4840 	if (dump_opt['d'] > 2 || dump_opt['m'])
4841 		dump_metaslabs(spa);
4842 	if (dump_opt['M'])
4843 		dump_metaslab_groups(spa);
4844 
4845 	if (dump_opt['d'] || dump_opt['i']) {
4846 		mos_refd_objs = range_tree_create(NULL, NULL);
4847 		dump_dir(dp->dp_meta_objset);
4848 
4849 		if (dump_opt['d'] >= 3) {
4850 			dsl_pool_t *dp = spa->spa_dsl_pool;
4851 			dump_full_bpobj(&spa->spa_deferred_bpobj,
4852 			    "Deferred frees", 0);
4853 			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
4854 				dump_full_bpobj(&dp->dp_free_bpobj,
4855 				    "Pool snapshot frees", 0);
4856 			}
4857 			if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
4858 				ASSERT(spa_feature_is_enabled(spa,
4859 				    SPA_FEATURE_DEVICE_REMOVAL));
4860 				dump_full_bpobj(&dp->dp_obsolete_bpobj,
4861 				    "Pool obsolete blocks", 0);
4862 			}
4863 
4864 			if (spa_feature_is_active(spa,
4865 			    SPA_FEATURE_ASYNC_DESTROY)) {
4866 				dump_bptree(spa->spa_meta_objset,
4867 				    dp->dp_bptree_obj,
4868 				    "Pool dataset frees");
4869 			}
4870 			dump_dtl(spa->spa_root_vdev, 0);
4871 		}
4872 		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
4873 		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
4874 
4875 		if (rc == 0 && !dump_opt['L'])
4876 			rc = dump_mos_leaks(spa);
4877 
4878 		for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
4879 			uint64_t refcount;
4880 
4881 			if (!(spa_feature_table[f].fi_flags &
4882 			    ZFEATURE_FLAG_PER_DATASET) ||
4883 			    !spa_feature_is_enabled(spa, f)) {
4884 				ASSERT0(dataset_feature_count[f]);
4885 				continue;
4886 			}
4887 			(void) feature_get_refcount(spa,
4888 			    &spa_feature_table[f], &refcount);
4889 			if (dataset_feature_count[f] != refcount) {
4890 				(void) printf("%s feature refcount mismatch: "
4891 				    "%lld datasets != %lld refcount\n",
4892 				    spa_feature_table[f].fi_uname,
4893 				    (longlong_t)dataset_feature_count[f],
4894 				    (longlong_t)refcount);
4895 				rc = 2;
4896 			} else {
4897 				(void) printf("Verified %s feature refcount "
4898 				    "of %llu is correct\n",
4899 				    spa_feature_table[f].fi_uname,
4900 				    (longlong_t)refcount);
4901 			}
4902 		}
4903 
4904 		if (rc == 0) {
4905 			rc = verify_device_removal_feature_counts(spa);
4906 		}
4907 	}
4908 
4909 	if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
4910 		rc = dump_block_stats(spa);
4911 
4912 	if (rc == 0)
4913 		rc = verify_spacemap_refcounts(spa);
4914 
4915 	if (dump_opt['s'])
4916 		show_pool_stats(spa);
4917 
4918 	if (dump_opt['h'])
4919 		dump_history(spa);
4920 
4921 	if (rc == 0)
4922 		rc = verify_checkpoint(spa);
4923 
4924 	if (rc != 0) {
4925 		dump_debug_buffer();
4926 		exit(rc);
4927 	}
4928 }
4929 
4930 #define	ZDB_FLAG_CHECKSUM	0x0001
4931 #define	ZDB_FLAG_DECOMPRESS	0x0002
4932 #define	ZDB_FLAG_BSWAP		0x0004
4933 #define	ZDB_FLAG_GBH		0x0008
4934 #define	ZDB_FLAG_INDIRECT	0x0010
4935 #define	ZDB_FLAG_PHYS		0x0020
4936 #define	ZDB_FLAG_RAW		0x0040
4937 #define	ZDB_FLAG_PRINT_BLKPTR	0x0080
4938 
4939 static int flagbits[256];
4940 
4941 static void
4942 zdb_print_blkptr(blkptr_t *bp, int flags)
4943 {
4944 	char blkbuf[BP_SPRINTF_LEN];
4945 
4946 	if (flags & ZDB_FLAG_BSWAP)
4947 		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
4948 
4949 	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
4950 	(void) printf("%s\n", blkbuf);
4951 }
4952 
4953 static void
4954 zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
4955 {
4956 	int i;
4957 
4958 	for (i = 0; i < nbps; i++)
4959 		zdb_print_blkptr(&bp[i], flags);
4960 }
4961 
4962 static void
4963 zdb_dump_gbh(void *buf, int flags)
4964 {
4965 	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
4966 }
4967 
4968 static void
4969 zdb_dump_block_raw(void *buf, uint64_t size, int flags)
4970 {
4971 	if (flags & ZDB_FLAG_BSWAP)
4972 		byteswap_uint64_array(buf, size);
4973 	(void) write(1, buf, size);
4974 }
4975 
4976 static void
4977 zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
4978 {
4979 	uint64_t *d = (uint64_t *)buf;
4980 	unsigned nwords = size / sizeof (uint64_t);
4981 	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
4982 	unsigned i, j;
4983 	const char *hdr;
4984 	char *c;
4985 
4986 
4987 	if (do_bswap)
4988 		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
4989 	else
4990 		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
4991 
4992 	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
4993 
4994 	for (i = 0; i < nwords; i += 2) {
4995 		(void) printf("%06llx:  %016llx  %016llx  ",
4996 		    (u_longlong_t)(i * sizeof (uint64_t)),
4997 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
4998 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
4999 
5000 		c = (char *)&d[i];
5001 		for (j = 0; j < 2 * sizeof (uint64_t); j++)
5002 			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
5003 		(void) printf("\n");
5004 	}
5005 }
5006 
5007 /*
5008  * There are two acceptable formats:
5009  *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
5010  *	child[.child]*    - For example: 0.1.1
5011  *
5012  * The second form can be used to specify arbitrary vdevs anywhere
5013  * in the heirarchy.  For example, in a pool with a mirror of
5014  * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
5015  */
5016 static vdev_t *
5017 zdb_vdev_lookup(vdev_t *vdev, const char *path)
5018 {
5019 	char *s, *p, *q;
5020 	unsigned i;
5021 
5022 	if (vdev == NULL)
5023 		return (NULL);
5024 
5025 	/* First, assume the x.x.x.x format */
5026 	i = strtoul(path, &s, 10);
5027 	if (s == path || (s && *s != '.' && *s != '\0'))
5028 		goto name;
5029 	if (i >= vdev->vdev_children)
5030 		return (NULL);
5031 
5032 	vdev = vdev->vdev_child[i];
5033 	if (*s == '\0')
5034 		return (vdev);
5035 	return (zdb_vdev_lookup(vdev, s+1));
5036 
5037 name:
5038 	for (i = 0; i < vdev->vdev_children; i++) {
5039 		vdev_t *vc = vdev->vdev_child[i];
5040 
5041 		if (vc->vdev_path == NULL) {
5042 			vc = zdb_vdev_lookup(vc, path);
5043 			if (vc == NULL)
5044 				continue;
5045 			else
5046 				return (vc);
5047 		}
5048 
5049 		p = strrchr(vc->vdev_path, '/');
5050 		p = p ? p + 1 : vc->vdev_path;
5051 		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
5052 
5053 		if (strcmp(vc->vdev_path, path) == 0)
5054 			return (vc);
5055 		if (strcmp(p, path) == 0)
5056 			return (vc);
5057 		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
5058 			return (vc);
5059 	}
5060 
5061 	return (NULL);
5062 }
5063 
5064 /* ARGSUSED */
5065 static int
5066 random_get_pseudo_bytes_cb(void *buf, size_t len, void *unused)
5067 {
5068 	return (random_get_pseudo_bytes(buf, len));
5069 }
5070 
5071 /*
5072  * Read a block from a pool and print it out.  The syntax of the
5073  * block descriptor is:
5074  *
5075  *	pool:vdev_specifier:offset:size[:flags]
5076  *
5077  *	pool           - The name of the pool you wish to read from
5078  *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
5079  *	offset         - offset, in hex, in bytes
5080  *	size           - Amount of data to read, in hex, in bytes
5081  *	flags          - A string of characters specifying options
5082  *		 b: Decode a blkptr at given offset within block
5083  *		*c: Calculate and display checksums
5084  *		 d: Decompress data before dumping
5085  *		 e: Byteswap data before dumping
5086  *		 g: Display data as a gang block header
5087  *		 i: Display as an indirect block
5088  *		 p: Do I/O to physical offset
5089  *		 r: Dump raw data to stdout
5090  *
5091  *              * = not yet implemented
5092  */
5093 static void
5094 zdb_read_block(char *thing, spa_t *spa)
5095 {
5096 	blkptr_t blk, *bp = &blk;
5097 	dva_t *dva = bp->blk_dva;
5098 	int flags = 0;
5099 	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
5100 	zio_t *zio;
5101 	vdev_t *vd;
5102 	abd_t *pabd;
5103 	void *lbuf, *buf;
5104 	const char *s, *vdev;
5105 	char *p, *dup, *flagstr;
5106 	int i, error;
5107 
5108 	dup = strdup(thing);
5109 	s = strtok(dup, ":");
5110 	vdev = s ? s : "";
5111 	s = strtok(NULL, ":");
5112 	offset = strtoull(s ? s : "", NULL, 16);
5113 	s = strtok(NULL, ":");
5114 	size = strtoull(s ? s : "", NULL, 16);
5115 	s = strtok(NULL, ":");
5116 	if (s)
5117 		flagstr = strdup(s);
5118 	else
5119 		flagstr = strdup("");
5120 
5121 	s = NULL;
5122 	if (size == 0)
5123 		s = "size must not be zero";
5124 	if (!IS_P2ALIGNED(size, DEV_BSIZE))
5125 		s = "size must be a multiple of sector size";
5126 	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
5127 		s = "offset must be a multiple of sector size";
5128 	if (s) {
5129 		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
5130 		free(dup);
5131 		return;
5132 	}
5133 
5134 	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
5135 		for (i = 0; flagstr[i]; i++) {
5136 			int bit = flagbits[(uchar_t)flagstr[i]];
5137 
5138 			if (bit == 0) {
5139 				(void) printf("***Invalid flag: %c\n",
5140 				    flagstr[i]);
5141 				continue;
5142 			}
5143 			flags |= bit;
5144 
5145 			/* If it's not something with an argument, keep going */
5146 			if ((bit & (ZDB_FLAG_CHECKSUM |
5147 			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
5148 				continue;
5149 
5150 			p = &flagstr[i + 1];
5151 			if (bit == ZDB_FLAG_PRINT_BLKPTR)
5152 				blkptr_offset = strtoull(p, &p, 16);
5153 			if (*p != ':' && *p != '\0') {
5154 				(void) printf("***Invalid flag arg: '%s'\n", s);
5155 				free(dup);
5156 				return;
5157 			}
5158 		}
5159 	}
5160 	free(flagstr);
5161 
5162 	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
5163 	if (vd == NULL) {
5164 		(void) printf("***Invalid vdev: %s\n", vdev);
5165 		free(dup);
5166 		return;
5167 	} else {
5168 		if (vd->vdev_path)
5169 			(void) fprintf(stderr, "Found vdev: %s\n",
5170 			    vd->vdev_path);
5171 		else
5172 			(void) fprintf(stderr, "Found vdev type: %s\n",
5173 			    vd->vdev_ops->vdev_op_type);
5174 	}
5175 
5176 	psize = size;
5177 	lsize = size;
5178 
5179 	pabd = abd_alloc_linear(SPA_MAXBLOCKSIZE, B_FALSE);
5180 	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5181 
5182 	BP_ZERO(bp);
5183 
5184 	DVA_SET_VDEV(&dva[0], vd->vdev_id);
5185 	DVA_SET_OFFSET(&dva[0], offset);
5186 	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
5187 	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
5188 
5189 	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
5190 
5191 	BP_SET_LSIZE(bp, lsize);
5192 	BP_SET_PSIZE(bp, psize);
5193 	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
5194 	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
5195 	BP_SET_TYPE(bp, DMU_OT_NONE);
5196 	BP_SET_LEVEL(bp, 0);
5197 	BP_SET_DEDUP(bp, 0);
5198 	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
5199 
5200 	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
5201 	zio = zio_root(spa, NULL, NULL, 0);
5202 
5203 	if (vd == vd->vdev_top) {
5204 		/*
5205 		 * Treat this as a normal block read.
5206 		 */
5207 		zio_nowait(zio_read(zio, spa, bp, pabd, psize, NULL, NULL,
5208 		    ZIO_PRIORITY_SYNC_READ,
5209 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
5210 	} else {
5211 		/*
5212 		 * Treat this as a vdev child I/O.
5213 		 */
5214 		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pabd,
5215 		    psize, ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
5216 		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
5217 		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
5218 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | ZIO_FLAG_OPTIONAL,
5219 		    NULL, NULL));
5220 	}
5221 
5222 	error = zio_wait(zio);
5223 	spa_config_exit(spa, SCL_STATE, FTAG);
5224 
5225 	if (error) {
5226 		(void) printf("Read of %s failed, error: %d\n", thing, error);
5227 		goto out;
5228 	}
5229 
5230 	if (flags & ZDB_FLAG_DECOMPRESS) {
5231 		/*
5232 		 * We don't know how the data was compressed, so just try
5233 		 * every decompress function at every inflated blocksize.
5234 		 */
5235 		enum zio_compress c;
5236 		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5237 		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5238 
5239 		abd_copy_to_buf(pbuf2, pabd, psize);
5240 
5241 		VERIFY0(abd_iterate_func(pabd, psize, SPA_MAXBLOCKSIZE - psize,
5242 		    random_get_pseudo_bytes_cb, NULL));
5243 
5244 		VERIFY0(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
5245 		    SPA_MAXBLOCKSIZE - psize));
5246 
5247 		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
5248 		    lsize -= SPA_MINBLOCKSIZE) {
5249 			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
5250 				if (zio_decompress_data(c, pabd,
5251 				    lbuf, psize, lsize) == 0 &&
5252 				    zio_decompress_data_buf(c, pbuf2,
5253 				    lbuf2, psize, lsize) == 0 &&
5254 				    bcmp(lbuf, lbuf2, lsize) == 0)
5255 					break;
5256 			}
5257 			if (c != ZIO_COMPRESS_FUNCTIONS)
5258 				break;
5259 			lsize -= SPA_MINBLOCKSIZE;
5260 		}
5261 
5262 		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
5263 		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
5264 
5265 		if (lsize <= psize) {
5266 			(void) printf("Decompress of %s failed\n", thing);
5267 			goto out;
5268 		}
5269 		buf = lbuf;
5270 		size = lsize;
5271 	} else {
5272 		buf = abd_to_buf(pabd);
5273 		size = psize;
5274 	}
5275 
5276 	if (flags & ZDB_FLAG_PRINT_BLKPTR)
5277 		zdb_print_blkptr((blkptr_t *)(void *)
5278 		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
5279 	else if (flags & ZDB_FLAG_RAW)
5280 		zdb_dump_block_raw(buf, size, flags);
5281 	else if (flags & ZDB_FLAG_INDIRECT)
5282 		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
5283 		    flags);
5284 	else if (flags & ZDB_FLAG_GBH)
5285 		zdb_dump_gbh(buf, flags);
5286 	else
5287 		zdb_dump_block(thing, buf, size, flags);
5288 
5289 out:
5290 	abd_free(pabd);
5291 	umem_free(lbuf, SPA_MAXBLOCKSIZE);
5292 	free(dup);
5293 }
5294 
5295 static void
5296 zdb_embedded_block(char *thing)
5297 {
5298 	blkptr_t bp;
5299 	unsigned long long *words = (void *)&bp;
5300 	char *buf;
5301 	int err;
5302 
5303 	bzero(&bp, sizeof (bp));
5304 	err = sscanf(thing, "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx:"
5305 	    "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx",
5306 	    words + 0, words + 1, words + 2, words + 3,
5307 	    words + 4, words + 5, words + 6, words + 7,
5308 	    words + 8, words + 9, words + 10, words + 11,
5309 	    words + 12, words + 13, words + 14, words + 15);
5310 	if (err != 16) {
5311 		(void) fprintf(stderr, "invalid input format\n");
5312 		exit(1);
5313 	}
5314 	ASSERT3U(BPE_GET_LSIZE(&bp), <=, SPA_MAXBLOCKSIZE);
5315 	buf = malloc(SPA_MAXBLOCKSIZE);
5316 	if (buf == NULL) {
5317 		(void) fprintf(stderr, "out of memory\n");
5318 		exit(1);
5319 	}
5320 	err = decode_embedded_bp(&bp, buf, BPE_GET_LSIZE(&bp));
5321 	if (err != 0) {
5322 		(void) fprintf(stderr, "decode failed: %u\n", err);
5323 		exit(1);
5324 	}
5325 	zdb_dump_block_raw(buf, BPE_GET_LSIZE(&bp), 0);
5326 	free(buf);
5327 }
5328 
5329 int
5330 main(int argc, char **argv)
5331 {
5332 	int c;
5333 	struct rlimit rl = { 1024, 1024 };
5334 	spa_t *spa = NULL;
5335 	objset_t *os = NULL;
5336 	int dump_all = 1;
5337 	int verbose = 0;
5338 	int error = 0;
5339 	char **searchdirs = NULL;
5340 	int nsearch = 0;
5341 	char *target, *target_pool;
5342 	nvlist_t *policy = NULL;
5343 	uint64_t max_txg = UINT64_MAX;
5344 	int flags = ZFS_IMPORT_MISSING_LOG;
5345 	int rewind = ZPOOL_NEVER_REWIND;
5346 	char *spa_config_path_env;
5347 	boolean_t target_is_spa = B_TRUE;
5348 	nvlist_t *cfg = NULL;
5349 
5350 	(void) setrlimit(RLIMIT_NOFILE, &rl);
5351 	(void) enable_extended_FILE_stdio(-1, -1);
5352 
5353 	dprintf_setup(&argc, argv);
5354 
5355 	/*
5356 	 * If there is an environment variable SPA_CONFIG_PATH it overrides
5357 	 * default spa_config_path setting. If -U flag is specified it will
5358 	 * override this environment variable settings once again.
5359 	 */
5360 	spa_config_path_env = getenv("SPA_CONFIG_PATH");
5361 	if (spa_config_path_env != NULL)
5362 		spa_config_path = spa_config_path_env;
5363 
5364 	while ((c = getopt(argc, argv,
5365 	    "AbcCdDeEFGhiI:klLmMo:Op:PqRsSt:uU:vVx:X")) != -1) {
5366 		switch (c) {
5367 		case 'b':
5368 		case 'c':
5369 		case 'C':
5370 		case 'd':
5371 		case 'D':
5372 		case 'E':
5373 		case 'G':
5374 		case 'h':
5375 		case 'i':
5376 		case 'l':
5377 		case 'm':
5378 		case 'M':
5379 		case 'O':
5380 		case 'R':
5381 		case 's':
5382 		case 'S':
5383 		case 'u':
5384 			dump_opt[c]++;
5385 			dump_all = 0;
5386 			break;
5387 		case 'A':
5388 		case 'e':
5389 		case 'F':
5390 		case 'k':
5391 		case 'L':
5392 		case 'P':
5393 		case 'q':
5394 		case 'X':
5395 			dump_opt[c]++;
5396 			break;
5397 		/* NB: Sort single match options below. */
5398 		case 'I':
5399 			max_inflight = strtoull(optarg, NULL, 0);
5400 			if (max_inflight == 0) {
5401 				(void) fprintf(stderr, "maximum number "
5402 				    "of inflight I/Os must be greater "
5403 				    "than 0\n");
5404 				usage();
5405 			}
5406 			break;
5407 		case 'o':
5408 			error = set_global_var(optarg);
5409 			if (error != 0)
5410 				usage();
5411 			break;
5412 		case 'p':
5413 			if (searchdirs == NULL) {
5414 				searchdirs = umem_alloc(sizeof (char *),
5415 				    UMEM_NOFAIL);
5416 			} else {
5417 				char **tmp = umem_alloc((nsearch + 1) *
5418 				    sizeof (char *), UMEM_NOFAIL);
5419 				bcopy(searchdirs, tmp, nsearch *
5420 				    sizeof (char *));
5421 				umem_free(searchdirs,
5422 				    nsearch * sizeof (char *));
5423 				searchdirs = tmp;
5424 			}
5425 			searchdirs[nsearch++] = optarg;
5426 			break;
5427 		case 't':
5428 			max_txg = strtoull(optarg, NULL, 0);
5429 			if (max_txg < TXG_INITIAL) {
5430 				(void) fprintf(stderr, "incorrect txg "
5431 				    "specified: %s\n", optarg);
5432 				usage();
5433 			}
5434 			break;
5435 		case 'U':
5436 			spa_config_path = optarg;
5437 			if (spa_config_path[0] != '/') {
5438 				(void) fprintf(stderr,
5439 				    "cachefile must be an absolute path "
5440 				    "(i.e. start with a slash)\n");
5441 				usage();
5442 			}
5443 			break;
5444 		case 'v':
5445 			verbose++;
5446 			break;
5447 		case 'V':
5448 			flags = ZFS_IMPORT_VERBATIM;
5449 			break;
5450 		case 'x':
5451 			vn_dumpdir = optarg;
5452 			break;
5453 		default:
5454 			usage();
5455 			break;
5456 		}
5457 	}
5458 
5459 	if (!dump_opt['e'] && searchdirs != NULL) {
5460 		(void) fprintf(stderr, "-p option requires use of -e\n");
5461 		usage();
5462 	}
5463 
5464 	/*
5465 	 * ZDB does not typically re-read blocks; therefore limit the ARC
5466 	 * to 256 MB, which can be used entirely for metadata.
5467 	 */
5468 	zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
5469 
5470 	/*
5471 	 * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
5472 	 * "zdb -b" uses traversal prefetch which uses async reads.
5473 	 * For good performance, let several of them be active at once.
5474 	 */
5475 	zfs_vdev_async_read_max_active = 10;
5476 
5477 	/*
5478 	 * Disable reference tracking for better performance.
5479 	 */
5480 	reference_tracking_enable = B_FALSE;
5481 
5482 	/*
5483 	 * Do not fail spa_load when spa_load_verify fails. This is needed
5484 	 * to load non-idle pools.
5485 	 */
5486 	spa_load_verify_dryrun = B_TRUE;
5487 
5488 	kernel_init(FREAD);
5489 	g_zfs = libzfs_init();
5490 	ASSERT(g_zfs != NULL);
5491 
5492 	if (dump_all)
5493 		verbose = MAX(verbose, 1);
5494 
5495 	for (c = 0; c < 256; c++) {
5496 		if (dump_all && strchr("AeEFklLOPRSX", c) == NULL)
5497 			dump_opt[c] = 1;
5498 		if (dump_opt[c])
5499 			dump_opt[c] += verbose;
5500 	}
5501 
5502 	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
5503 	zfs_recover = (dump_opt['A'] > 1);
5504 
5505 	argc -= optind;
5506 	argv += optind;
5507 
5508 	if (argc < 2 && dump_opt['R'])
5509 		usage();
5510 
5511 	if (dump_opt['E']) {
5512 		if (argc != 1)
5513 			usage();
5514 		zdb_embedded_block(argv[0]);
5515 		return (0);
5516 	}
5517 
5518 	if (argc < 1) {
5519 		if (!dump_opt['e'] && dump_opt['C']) {
5520 			dump_cachefile(spa_config_path);
5521 			return (0);
5522 		}
5523 		usage();
5524 	}
5525 
5526 	if (dump_opt['l'])
5527 		return (dump_label(argv[0]));
5528 
5529 	if (dump_opt['O']) {
5530 		if (argc != 2)
5531 			usage();
5532 		dump_opt['v'] = verbose + 3;
5533 		return (dump_path(argv[0], argv[1]));
5534 	}
5535 
5536 	if (dump_opt['X'] || dump_opt['F'])
5537 		rewind = ZPOOL_DO_REWIND |
5538 		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
5539 
5540 	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
5541 	    nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, max_txg) != 0 ||
5542 	    nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY, rewind) != 0)
5543 		fatal("internal error: %s", strerror(ENOMEM));
5544 
5545 	error = 0;
5546 	target = argv[0];
5547 
5548 	if (strpbrk(target, "/@") != NULL) {
5549 		size_t targetlen;
5550 
5551 		target_pool = strdup(target);
5552 		*strpbrk(target_pool, "/@") = '\0';
5553 
5554 		target_is_spa = B_FALSE;
5555 		targetlen = strlen(target);
5556 		if (targetlen && target[targetlen - 1] == '/')
5557 			target[targetlen - 1] = '\0';
5558 	} else {
5559 		target_pool = target;
5560 	}
5561 
5562 	if (dump_opt['e']) {
5563 		importargs_t args = { 0 };
5564 
5565 		args.paths = nsearch;
5566 		args.path = searchdirs;
5567 		args.can_be_active = B_TRUE;
5568 
5569 		error = zpool_tryimport(g_zfs, target_pool, &cfg, &args);
5570 
5571 		if (error == 0) {
5572 
5573 			if (nvlist_add_nvlist(cfg,
5574 			    ZPOOL_LOAD_POLICY, policy) != 0) {
5575 				fatal("can't open '%s': %s",
5576 				    target, strerror(ENOMEM));
5577 			}
5578 
5579 			if (dump_opt['C'] > 1) {
5580 				(void) printf("\nConfiguration for import:\n");
5581 				dump_nvlist(cfg, 8);
5582 			}
5583 
5584 			/*
5585 			 * Disable the activity check to allow examination of
5586 			 * active pools.
5587 			 */
5588 			error = spa_import(target_pool, cfg, NULL,
5589 			    flags | ZFS_IMPORT_SKIP_MMP);
5590 		}
5591 	}
5592 
5593 	char *checkpoint_pool = NULL;
5594 	char *checkpoint_target = NULL;
5595 	if (dump_opt['k']) {
5596 		checkpoint_pool = import_checkpointed_state(target, cfg,
5597 		    &checkpoint_target);
5598 
5599 		if (checkpoint_target != NULL)
5600 			target = checkpoint_target;
5601 
5602 	}
5603 
5604 	if (error == 0) {
5605 		if (dump_opt['k'] && (target_is_spa || dump_opt['R'])) {
5606 			ASSERT(checkpoint_pool != NULL);
5607 			ASSERT(checkpoint_target == NULL);
5608 
5609 			error = spa_open(checkpoint_pool, &spa, FTAG);
5610 			if (error != 0) {
5611 				fatal("Tried to open pool \"%s\" but "
5612 				    "spa_open() failed with error %d\n",
5613 				    checkpoint_pool, error);
5614 			}
5615 
5616 		} else if (target_is_spa || dump_opt['R']) {
5617 			zdb_set_skip_mmp(target);
5618 			error = spa_open_rewind(target, &spa, FTAG, policy,
5619 			    NULL);
5620 			if (error) {
5621 				/*
5622 				 * If we're missing the log device then
5623 				 * try opening the pool after clearing the
5624 				 * log state.
5625 				 */
5626 				mutex_enter(&spa_namespace_lock);
5627 				if ((spa = spa_lookup(target)) != NULL &&
5628 				    spa->spa_log_state == SPA_LOG_MISSING) {
5629 					spa->spa_log_state = SPA_LOG_CLEAR;
5630 					error = 0;
5631 				}
5632 				mutex_exit(&spa_namespace_lock);
5633 
5634 				if (!error) {
5635 					error = spa_open_rewind(target, &spa,
5636 					    FTAG, policy, NULL);
5637 				}
5638 			}
5639 		} else {
5640 			zdb_set_skip_mmp(target);
5641 			error = open_objset(target, DMU_OST_ANY, FTAG, &os);
5642 		}
5643 	}
5644 	nvlist_free(policy);
5645 
5646 	if (error)
5647 		fatal("can't open '%s': %s", target, strerror(error));
5648 
5649 	argv++;
5650 	argc--;
5651 	if (!dump_opt['R']) {
5652 		if (argc > 0) {
5653 			zopt_objects = argc;
5654 			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
5655 			for (unsigned i = 0; i < zopt_objects; i++) {
5656 				errno = 0;
5657 				zopt_object[i] = strtoull(argv[i], NULL, 0);
5658 				if (zopt_object[i] == 0 && errno != 0)
5659 					fatal("bad number %s: %s",
5660 					    argv[i], strerror(errno));
5661 			}
5662 		}
5663 		if (os != NULL) {
5664 			dump_dir(os);
5665 		} else if (zopt_objects > 0 && !dump_opt['m']) {
5666 			dump_dir(spa->spa_meta_objset);
5667 		} else {
5668 			dump_zpool(spa);
5669 		}
5670 	} else {
5671 		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
5672 		flagbits['c'] = ZDB_FLAG_CHECKSUM;
5673 		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
5674 		flagbits['e'] = ZDB_FLAG_BSWAP;
5675 		flagbits['g'] = ZDB_FLAG_GBH;
5676 		flagbits['i'] = ZDB_FLAG_INDIRECT;
5677 		flagbits['p'] = ZDB_FLAG_PHYS;
5678 		flagbits['r'] = ZDB_FLAG_RAW;
5679 
5680 		for (int i = 0; i < argc; i++)
5681 			zdb_read_block(argv[i], spa);
5682 	}
5683 
5684 	if (dump_opt['k']) {
5685 		free(checkpoint_pool);
5686 		if (!target_is_spa)
5687 			free(checkpoint_target);
5688 	}
5689 
5690 	if (os != NULL)
5691 		close_objset(os, FTAG);
5692 	else
5693 		spa_close(spa, FTAG);
5694 
5695 	fuid_table_destroy();
5696 
5697 	dump_debug_buffer();
5698 
5699 	libzfs_fini(g_zfs);
5700 	kernel_fini();
5701 
5702 	return (error);
5703 }
5704