xref: /illumos-gate/usr/src/cmd/zdb/zdb.c (revision f0a05239)
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, 2019 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 <zfs_fletcher.h>
62 #include <sys/zfs_fuid.h>
63 #include <sys/arc.h>
64 #include <sys/arc_impl.h>
65 #include <sys/ddt.h>
66 #include <sys/zfeature.h>
67 #include <sys/abd.h>
68 #include <sys/blkptr.h>
69 #include <sys/dsl_scan.h>
70 #include <sys/dsl_crypt.h>
71 #include <zfs_comutil.h>
72 #include <libcmdutils.h>
73 #undef verify
74 #include <libzfs.h>
75 
76 #include <libnvpair.h>
77 #include <libzutil.h>
78 
79 #include "zdb.h"
80 
81 #define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
82 	zio_compress_table[(idx)].ci_name : "UNKNOWN")
83 #define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
84 	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
85 #define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
86 	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
87 	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
88 #define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
89 	(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ?	\
90 	DMU_OT_ZAP_OTHER : \
91 	(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
92 	DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
93 
94 extern int reference_tracking_enable;
95 extern boolean_t zfs_recover;
96 extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
97 extern int zfs_vdev_async_read_max_active;
98 extern int aok;
99 extern boolean_t spa_load_verify_dryrun;
100 extern int zfs_btree_verify_intensity;
101 
102 static const char cmdname[] = "zdb";
103 uint8_t dump_opt[256];
104 
105 typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
106 
107 uint64_t *zopt_object = NULL;
108 static unsigned zopt_objects = 0;
109 uint64_t max_inflight = 1000;
110 static int leaked_objects = 0;
111 
112 static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
113 static void mos_obj_refd(uint64_t);
114 
115 /*
116  * These libumem hooks provide a reasonable set of defaults for the allocator's
117  * debugging facilities.
118  */
119 const char *
120 _umem_debug_init()
121 {
122 	return ("default,verbose"); /* $UMEM_DEBUG setting */
123 }
124 
125 const char *
126 _umem_logging_init(void)
127 {
128 	return ("fail,contents"); /* $UMEM_LOGGING setting */
129 }
130 
131 static void
132 usage(void)
133 {
134 	(void) fprintf(stderr,
135 	    "Usage:\t%s [-AbcdDFGhikLMPsvX] [-e [-V] [-p <path> ...]] "
136 	    "[-I <inflight I/Os>]\n"
137 	    "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
138 	    "\t\t[<poolname> [<object> ...]]\n"
139 	    "\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset> "
140 	    "[<object> ...]\n"
141 	    "\t%s -C [-A] [-U <cache>]\n"
142 	    "\t%s -l [-Aqu] <device>\n"
143 	    "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
144 	    "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
145 	    "\t%s -O <dataset> <path>\n"
146 	    "\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
147 	    "\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
148 	    "\t%s -E [-A] word0:word1:...:word15\n"
149 	    "\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
150 	    "<poolname>\n\n",
151 	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
152 	    cmdname, cmdname);
153 
154 	(void) fprintf(stderr, "    Dataset name must include at least one "
155 	    "separator character '/' or '@'\n");
156 	(void) fprintf(stderr, "    If dataset name is specified, only that "
157 	    "dataset is dumped\n");
158 	(void) fprintf(stderr, "    If object numbers are specified, only "
159 	    "those objects are dumped\n\n");
160 	(void) fprintf(stderr, "    Options to control amount of output:\n");
161 	(void) fprintf(stderr, "        -b block statistics\n");
162 	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
163 	    "all data) blocks\n");
164 	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
165 	(void) fprintf(stderr, "        -d dataset(s)\n");
166 	(void) fprintf(stderr, "        -D dedup statistics\n");
167 	(void) fprintf(stderr, "        -E decode and display block from an "
168 	    "embedded block pointer\n");
169 	(void) fprintf(stderr, "        -h pool history\n");
170 	(void) fprintf(stderr, "        -i intent logs\n");
171 	(void) fprintf(stderr, "        -l read label contents\n");
172 	(void) fprintf(stderr, "        -k examine the checkpointed state "
173 	    "of the pool\n");
174 	(void) fprintf(stderr, "        -L disable leak tracking (do not "
175 	    "load spacemaps)\n");
176 	(void) fprintf(stderr, "        -m metaslabs\n");
177 	(void) fprintf(stderr, "        -M metaslab groups\n");
178 	(void) fprintf(stderr, "        -O perform object lookups by path\n");
179 	(void) fprintf(stderr, "        -R read and display block from a "
180 	    "device\n");
181 	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
182 	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
183 	(void) fprintf(stderr, "        -v verbose (applies to all "
184 	    "others)\n\n");
185 	(void) fprintf(stderr, "    Below options are intended for use "
186 	    "with other options:\n");
187 	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
188 	    "panic recovery (-AA) or both (-AAA)\n");
189 	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
190 	    "has altroot/not in a cachefile\n");
191 	(void) fprintf(stderr, "        -F attempt automatic rewind within "
192 	    "safe range of transaction groups\n");
193 	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
194 	    "exiting\n");
195 	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
196 	    "specify the maximum number of "
197 	    "checksumming I/Os [default is 200]\n");
198 	(void) fprintf(stderr, "        -o <variable>=<value> set global "
199 	    "variable to an unsigned 32-bit integer value\n");
200 	(void) fprintf(stderr, "        -p <path> -- use one or more with "
201 	    "-e to specify path to vdev dir\n");
202 	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
203 	(void) fprintf(stderr, "        -q don't print label contents\n");
204 	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
205 	    "searching for uberblocks\n");
206 	(void) fprintf(stderr, "        -u uberblock\n");
207 	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
208 	    "cachefile\n");
209 	(void) fprintf(stderr, "        -V do verbatim import\n");
210 	(void) fprintf(stderr, "        -x <dumpdir> -- "
211 	    "dump all read blocks into specified directory\n");
212 	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
213 	    "work with dataset)\n\n");
214 	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
215 	    "to make only that option verbose\n");
216 	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
217 	exit(1);
218 }
219 
220 static void
221 dump_debug_buffer()
222 {
223 	if (dump_opt['G']) {
224 		(void) printf("\n");
225 		zfs_dbgmsg_print("zdb");
226 	}
227 }
228 
229 /*
230  * Called for usage errors that are discovered after a call to spa_open(),
231  * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
232  */
233 
234 static void
235 fatal(const char *fmt, ...)
236 {
237 	va_list ap;
238 
239 	va_start(ap, fmt);
240 	(void) fprintf(stderr, "%s: ", cmdname);
241 	(void) vfprintf(stderr, fmt, ap);
242 	va_end(ap);
243 	(void) fprintf(stderr, "\n");
244 
245 	dump_debug_buffer();
246 
247 	exit(1);
248 }
249 
250 /* ARGSUSED */
251 static void
252 dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
253 {
254 	nvlist_t *nv;
255 	size_t nvsize = *(uint64_t *)data;
256 	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
257 
258 	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
259 
260 	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
261 
262 	umem_free(packed, nvsize);
263 
264 	dump_nvlist(nv, 8);
265 
266 	nvlist_free(nv);
267 }
268 
269 /* ARGSUSED */
270 static void
271 dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
272 {
273 	spa_history_phys_t *shp = data;
274 
275 	if (shp == NULL)
276 		return;
277 
278 	(void) printf("\t\tpool_create_len = %llu\n",
279 	    (u_longlong_t)shp->sh_pool_create_len);
280 	(void) printf("\t\tphys_max_off = %llu\n",
281 	    (u_longlong_t)shp->sh_phys_max_off);
282 	(void) printf("\t\tbof = %llu\n",
283 	    (u_longlong_t)shp->sh_bof);
284 	(void) printf("\t\teof = %llu\n",
285 	    (u_longlong_t)shp->sh_eof);
286 	(void) printf("\t\trecords_lost = %llu\n",
287 	    (u_longlong_t)shp->sh_records_lost);
288 }
289 
290 static void
291 zdb_nicenum(uint64_t num, char *buf, size_t buflen)
292 {
293 	if (dump_opt['P'])
294 		(void) snprintf(buf, buflen, "%llu", (longlong_t)num);
295 	else
296 		nicenum(num, buf, sizeof (buf));
297 }
298 
299 static const char histo_stars[] = "****************************************";
300 static const uint64_t histo_width = sizeof (histo_stars) - 1;
301 
302 static void
303 dump_histogram(const uint64_t *histo, int size, int offset)
304 {
305 	int i;
306 	int minidx = size - 1;
307 	int maxidx = 0;
308 	uint64_t max = 0;
309 
310 	for (i = 0; i < size; i++) {
311 		if (histo[i] > max)
312 			max = histo[i];
313 		if (histo[i] > 0 && i > maxidx)
314 			maxidx = i;
315 		if (histo[i] > 0 && i < minidx)
316 			minidx = i;
317 	}
318 
319 	if (max < histo_width)
320 		max = histo_width;
321 
322 	for (i = minidx; i <= maxidx; i++) {
323 		(void) printf("\t\t\t%3u: %6llu %s\n",
324 		    i + offset, (u_longlong_t)histo[i],
325 		    &histo_stars[(max - histo[i]) * histo_width / max]);
326 	}
327 }
328 
329 static void
330 dump_zap_stats(objset_t *os, uint64_t object)
331 {
332 	int error;
333 	zap_stats_t zs;
334 
335 	error = zap_get_stats(os, object, &zs);
336 	if (error)
337 		return;
338 
339 	if (zs.zs_ptrtbl_len == 0) {
340 		ASSERT(zs.zs_num_blocks == 1);
341 		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
342 		    (u_longlong_t)zs.zs_blocksize,
343 		    (u_longlong_t)zs.zs_num_entries);
344 		return;
345 	}
346 
347 	(void) printf("\tFat ZAP stats:\n");
348 
349 	(void) printf("\t\tPointer table:\n");
350 	(void) printf("\t\t\t%llu elements\n",
351 	    (u_longlong_t)zs.zs_ptrtbl_len);
352 	(void) printf("\t\t\tzt_blk: %llu\n",
353 	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
354 	(void) printf("\t\t\tzt_numblks: %llu\n",
355 	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
356 	(void) printf("\t\t\tzt_shift: %llu\n",
357 	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
358 	(void) printf("\t\t\tzt_blks_copied: %llu\n",
359 	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
360 	(void) printf("\t\t\tzt_nextblk: %llu\n",
361 	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
362 
363 	(void) printf("\t\tZAP entries: %llu\n",
364 	    (u_longlong_t)zs.zs_num_entries);
365 	(void) printf("\t\tLeaf blocks: %llu\n",
366 	    (u_longlong_t)zs.zs_num_leafs);
367 	(void) printf("\t\tTotal blocks: %llu\n",
368 	    (u_longlong_t)zs.zs_num_blocks);
369 	(void) printf("\t\tzap_block_type: 0x%llx\n",
370 	    (u_longlong_t)zs.zs_block_type);
371 	(void) printf("\t\tzap_magic: 0x%llx\n",
372 	    (u_longlong_t)zs.zs_magic);
373 	(void) printf("\t\tzap_salt: 0x%llx\n",
374 	    (u_longlong_t)zs.zs_salt);
375 
376 	(void) printf("\t\tLeafs with 2^n pointers:\n");
377 	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
378 
379 	(void) printf("\t\tBlocks with n*5 entries:\n");
380 	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
381 
382 	(void) printf("\t\tBlocks n/10 full:\n");
383 	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
384 
385 	(void) printf("\t\tEntries with n chunks:\n");
386 	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
387 
388 	(void) printf("\t\tBuckets with n entries:\n");
389 	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
390 }
391 
392 /*ARGSUSED*/
393 static void
394 dump_none(objset_t *os, uint64_t object, void *data, size_t size)
395 {
396 }
397 
398 /*ARGSUSED*/
399 static void
400 dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
401 {
402 	(void) printf("\tUNKNOWN OBJECT TYPE\n");
403 }
404 
405 /*ARGSUSED*/
406 static void
407 dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
408 {
409 }
410 
411 /*ARGSUSED*/
412 static void
413 dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
414 {
415 }
416 
417 /*ARGSUSED*/
418 static void
419 dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
420 {
421 	zap_cursor_t zc;
422 	zap_attribute_t attr;
423 	void *prop;
424 	unsigned i;
425 
426 	dump_zap_stats(os, object);
427 	(void) printf("\n");
428 
429 	for (zap_cursor_init(&zc, os, object);
430 	    zap_cursor_retrieve(&zc, &attr) == 0;
431 	    zap_cursor_advance(&zc)) {
432 		(void) printf("\t\t%s = ", attr.za_name);
433 		if (attr.za_num_integers == 0) {
434 			(void) printf("\n");
435 			continue;
436 		}
437 		prop = umem_zalloc(attr.za_num_integers *
438 		    attr.za_integer_length, UMEM_NOFAIL);
439 		(void) zap_lookup(os, object, attr.za_name,
440 		    attr.za_integer_length, attr.za_num_integers, prop);
441 		if (attr.za_integer_length == 1) {
442 			if (strcmp(attr.za_name,
443 			    DSL_CRYPTO_KEY_MASTER_KEY) == 0 ||
444 			    strcmp(attr.za_name,
445 			    DSL_CRYPTO_KEY_HMAC_KEY) == 0 ||
446 			    strcmp(attr.za_name, DSL_CRYPTO_KEY_IV) == 0 ||
447 			    strcmp(attr.za_name, DSL_CRYPTO_KEY_MAC) == 0 ||
448 			    strcmp(attr.za_name, DMU_POOL_CHECKSUM_SALT) == 0) {
449 				uint8_t *u8 = prop;
450 
451 				for (i = 0; i < attr.za_num_integers; i++) {
452 					(void) printf("%02x", u8[i]);
453 				}
454 			} else {
455 				(void) printf("%s", (char *)prop);
456 			}
457 		} else {
458 			for (i = 0; i < attr.za_num_integers; i++) {
459 				switch (attr.za_integer_length) {
460 				case 2:
461 					(void) printf("%u ",
462 					    ((uint16_t *)prop)[i]);
463 					break;
464 				case 4:
465 					(void) printf("%u ",
466 					    ((uint32_t *)prop)[i]);
467 					break;
468 				case 8:
469 					(void) printf("%lld ",
470 					    (u_longlong_t)((int64_t *)prop)[i]);
471 					break;
472 				}
473 			}
474 		}
475 		(void) printf("\n");
476 		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
477 	}
478 	zap_cursor_fini(&zc);
479 }
480 
481 static void
482 dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
483 {
484 	bpobj_phys_t *bpop = data;
485 	char bytes[32], comp[32], uncomp[32];
486 
487 	/* make sure the output won't get truncated */
488 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
489 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
490 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
491 
492 	if (bpop == NULL)
493 		return;
494 
495 	zdb_nicenum(bpop->bpo_bytes, bytes, sizeof (bytes));
496 	zdb_nicenum(bpop->bpo_comp, comp, sizeof (comp));
497 	zdb_nicenum(bpop->bpo_uncomp, uncomp, sizeof (uncomp));
498 
499 	(void) printf("\t\tnum_blkptrs = %llu\n",
500 	    (u_longlong_t)bpop->bpo_num_blkptrs);
501 	(void) printf("\t\tbytes = %s\n", bytes);
502 	if (size >= BPOBJ_SIZE_V1) {
503 		(void) printf("\t\tcomp = %s\n", comp);
504 		(void) printf("\t\tuncomp = %s\n", uncomp);
505 	}
506 	if (size >= sizeof (*bpop)) {
507 		(void) printf("\t\tsubobjs = %llu\n",
508 		    (u_longlong_t)bpop->bpo_subobjs);
509 		(void) printf("\t\tnum_subobjs = %llu\n",
510 		    (u_longlong_t)bpop->bpo_num_subobjs);
511 	}
512 
513 	if (dump_opt['d'] < 5)
514 		return;
515 
516 	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
517 		char blkbuf[BP_SPRINTF_LEN];
518 		blkptr_t bp;
519 
520 		int err = dmu_read(os, object,
521 		    i * sizeof (bp), sizeof (bp), &bp, 0);
522 		if (err != 0) {
523 			(void) printf("got error %u from dmu_read\n", err);
524 			break;
525 		}
526 		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
527 		(void) printf("\t%s\n", blkbuf);
528 	}
529 }
530 
531 /* ARGSUSED */
532 static void
533 dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
534 {
535 	dmu_object_info_t doi;
536 
537 	VERIFY0(dmu_object_info(os, object, &doi));
538 	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
539 
540 	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
541 	if (err != 0) {
542 		(void) printf("got error %u from dmu_read\n", err);
543 		kmem_free(subobjs, doi.doi_max_offset);
544 		return;
545 	}
546 
547 	int64_t last_nonzero = -1;
548 	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
549 		if (subobjs[i] != 0)
550 			last_nonzero = i;
551 	}
552 
553 	for (int64_t i = 0; i <= last_nonzero; i++) {
554 		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
555 	}
556 	kmem_free(subobjs, doi.doi_max_offset);
557 }
558 
559 /*ARGSUSED*/
560 static void
561 dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
562 {
563 	dump_zap_stats(os, object);
564 	/* contents are printed elsewhere, properly decoded */
565 }
566 
567 /*ARGSUSED*/
568 static void
569 dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
570 {
571 	zap_cursor_t zc;
572 	zap_attribute_t attr;
573 
574 	dump_zap_stats(os, object);
575 	(void) printf("\n");
576 
577 	for (zap_cursor_init(&zc, os, object);
578 	    zap_cursor_retrieve(&zc, &attr) == 0;
579 	    zap_cursor_advance(&zc)) {
580 		(void) printf("\t\t%s = ", attr.za_name);
581 		if (attr.za_num_integers == 0) {
582 			(void) printf("\n");
583 			continue;
584 		}
585 		(void) printf(" %llx : [%d:%d:%d]\n",
586 		    (u_longlong_t)attr.za_first_integer,
587 		    (int)ATTR_LENGTH(attr.za_first_integer),
588 		    (int)ATTR_BSWAP(attr.za_first_integer),
589 		    (int)ATTR_NUM(attr.za_first_integer));
590 	}
591 	zap_cursor_fini(&zc);
592 }
593 
594 /*ARGSUSED*/
595 static void
596 dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
597 {
598 	zap_cursor_t zc;
599 	zap_attribute_t attr;
600 	uint16_t *layout_attrs;
601 	unsigned i;
602 
603 	dump_zap_stats(os, object);
604 	(void) printf("\n");
605 
606 	for (zap_cursor_init(&zc, os, object);
607 	    zap_cursor_retrieve(&zc, &attr) == 0;
608 	    zap_cursor_advance(&zc)) {
609 		(void) printf("\t\t%s = [", attr.za_name);
610 		if (attr.za_num_integers == 0) {
611 			(void) printf("\n");
612 			continue;
613 		}
614 
615 		VERIFY(attr.za_integer_length == 2);
616 		layout_attrs = umem_zalloc(attr.za_num_integers *
617 		    attr.za_integer_length, UMEM_NOFAIL);
618 
619 		VERIFY(zap_lookup(os, object, attr.za_name,
620 		    attr.za_integer_length,
621 		    attr.za_num_integers, layout_attrs) == 0);
622 
623 		for (i = 0; i != attr.za_num_integers; i++)
624 			(void) printf(" %d ", (int)layout_attrs[i]);
625 		(void) printf("]\n");
626 		umem_free(layout_attrs,
627 		    attr.za_num_integers * attr.za_integer_length);
628 	}
629 	zap_cursor_fini(&zc);
630 }
631 
632 /*ARGSUSED*/
633 static void
634 dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
635 {
636 	zap_cursor_t zc;
637 	zap_attribute_t attr;
638 	const char *typenames[] = {
639 		/* 0 */ "not specified",
640 		/* 1 */ "FIFO",
641 		/* 2 */ "Character Device",
642 		/* 3 */ "3 (invalid)",
643 		/* 4 */ "Directory",
644 		/* 5 */ "5 (invalid)",
645 		/* 6 */ "Block Device",
646 		/* 7 */ "7 (invalid)",
647 		/* 8 */ "Regular File",
648 		/* 9 */ "9 (invalid)",
649 		/* 10 */ "Symbolic Link",
650 		/* 11 */ "11 (invalid)",
651 		/* 12 */ "Socket",
652 		/* 13 */ "Door",
653 		/* 14 */ "Event Port",
654 		/* 15 */ "15 (invalid)",
655 	};
656 
657 	dump_zap_stats(os, object);
658 	(void) printf("\n");
659 
660 	for (zap_cursor_init(&zc, os, object);
661 	    zap_cursor_retrieve(&zc, &attr) == 0;
662 	    zap_cursor_advance(&zc)) {
663 		(void) printf("\t\t%s = %lld (type: %s)\n",
664 		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
665 		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
666 	}
667 	zap_cursor_fini(&zc);
668 }
669 
670 static int
671 get_dtl_refcount(vdev_t *vd)
672 {
673 	int refcount = 0;
674 
675 	if (vd->vdev_ops->vdev_op_leaf) {
676 		space_map_t *sm = vd->vdev_dtl_sm;
677 
678 		if (sm != NULL &&
679 		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
680 			return (1);
681 		return (0);
682 	}
683 
684 	for (unsigned c = 0; c < vd->vdev_children; c++)
685 		refcount += get_dtl_refcount(vd->vdev_child[c]);
686 	return (refcount);
687 }
688 
689 static int
690 get_metaslab_refcount(vdev_t *vd)
691 {
692 	int refcount = 0;
693 
694 	if (vd->vdev_top == vd) {
695 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
696 			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
697 
698 			if (sm != NULL &&
699 			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
700 				refcount++;
701 		}
702 	}
703 	for (unsigned c = 0; c < vd->vdev_children; c++)
704 		refcount += get_metaslab_refcount(vd->vdev_child[c]);
705 
706 	return (refcount);
707 }
708 
709 static int
710 get_obsolete_refcount(vdev_t *vd)
711 {
712 	int refcount = 0;
713 
714 	uint64_t obsolete_sm_obj = vdev_obsolete_sm_object(vd);
715 	if (vd->vdev_top == vd && obsolete_sm_obj != 0) {
716 		dmu_object_info_t doi;
717 		VERIFY0(dmu_object_info(vd->vdev_spa->spa_meta_objset,
718 		    obsolete_sm_obj, &doi));
719 		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
720 			refcount++;
721 		}
722 	} else {
723 		ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
724 		ASSERT3U(obsolete_sm_obj, ==, 0);
725 	}
726 	for (unsigned c = 0; c < vd->vdev_children; c++) {
727 		refcount += get_obsolete_refcount(vd->vdev_child[c]);
728 	}
729 
730 	return (refcount);
731 }
732 
733 static int
734 get_prev_obsolete_spacemap_refcount(spa_t *spa)
735 {
736 	uint64_t prev_obj =
737 	    spa->spa_condensing_indirect_phys.scip_prev_obsolete_sm_object;
738 	if (prev_obj != 0) {
739 		dmu_object_info_t doi;
740 		VERIFY0(dmu_object_info(spa->spa_meta_objset, prev_obj, &doi));
741 		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
742 			return (1);
743 		}
744 	}
745 	return (0);
746 }
747 
748 static int
749 get_checkpoint_refcount(vdev_t *vd)
750 {
751 	int refcount = 0;
752 
753 	if (vd->vdev_top == vd && vd->vdev_top_zap != 0 &&
754 	    zap_contains(spa_meta_objset(vd->vdev_spa),
755 	    vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) == 0)
756 		refcount++;
757 
758 	for (uint64_t c = 0; c < vd->vdev_children; c++)
759 		refcount += get_checkpoint_refcount(vd->vdev_child[c]);
760 
761 	return (refcount);
762 }
763 
764 static int
765 get_log_spacemap_refcount(spa_t *spa)
766 {
767 	return (avl_numnodes(&spa->spa_sm_logs_by_txg));
768 }
769 
770 static int
771 verify_spacemap_refcounts(spa_t *spa)
772 {
773 	uint64_t expected_refcount = 0;
774 	uint64_t actual_refcount;
775 
776 	(void) feature_get_refcount(spa,
777 	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
778 	    &expected_refcount);
779 	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
780 	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
781 	actual_refcount += get_obsolete_refcount(spa->spa_root_vdev);
782 	actual_refcount += get_prev_obsolete_spacemap_refcount(spa);
783 	actual_refcount += get_checkpoint_refcount(spa->spa_root_vdev);
784 	actual_refcount += get_log_spacemap_refcount(spa);
785 
786 	if (expected_refcount != actual_refcount) {
787 		(void) printf("space map refcount mismatch: expected %lld != "
788 		    "actual %lld\n",
789 		    (longlong_t)expected_refcount,
790 		    (longlong_t)actual_refcount);
791 		return (2);
792 	}
793 	return (0);
794 }
795 
796 static void
797 dump_spacemap(objset_t *os, space_map_t *sm)
798 {
799 	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
800 	    "INVALID", "INVALID", "INVALID", "INVALID" };
801 
802 	if (sm == NULL)
803 		return;
804 
805 	(void) printf("space map object %llu:\n",
806 	    (longlong_t)sm->sm_object);
807 	(void) printf("  smp_length = 0x%llx\n",
808 	    (longlong_t)sm->sm_phys->smp_length);
809 	(void) printf("  smp_alloc = 0x%llx\n",
810 	    (longlong_t)sm->sm_phys->smp_alloc);
811 
812 	if (dump_opt['d'] < 6 && dump_opt['m'] < 4)
813 		return;
814 
815 	/*
816 	 * Print out the freelist entries in both encoded and decoded form.
817 	 */
818 	uint8_t mapshift = sm->sm_shift;
819 	int64_t alloc = 0;
820 	uint64_t word, entry_id = 0;
821 	for (uint64_t offset = 0; offset < space_map_length(sm);
822 	    offset += sizeof (word)) {
823 
824 		VERIFY0(dmu_read(os, space_map_object(sm), offset,
825 		    sizeof (word), &word, DMU_READ_PREFETCH));
826 
827 		if (sm_entry_is_debug(word)) {
828 			(void) printf("\t    [%6llu] %s: txg %llu pass %llu\n",
829 			    (u_longlong_t)entry_id,
830 			    ddata[SM_DEBUG_ACTION_DECODE(word)],
831 			    (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
832 			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
833 			entry_id++;
834 			continue;
835 		}
836 
837 		uint8_t words;
838 		char entry_type;
839 		uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;
840 
841 		if (sm_entry_is_single_word(word)) {
842 			entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
843 			    'A' : 'F';
844 			entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
845 			    sm->sm_start;
846 			entry_run = SM_RUN_DECODE(word) << mapshift;
847 			words = 1;
848 		} else {
849 			/* it is a two-word entry so we read another word */
850 			ASSERT(sm_entry_is_double_word(word));
851 
852 			uint64_t extra_word;
853 			offset += sizeof (extra_word);
854 			VERIFY0(dmu_read(os, space_map_object(sm), offset,
855 			    sizeof (extra_word), &extra_word,
856 			    DMU_READ_PREFETCH));
857 
858 			ASSERT3U(offset, <=, space_map_length(sm));
859 
860 			entry_run = SM2_RUN_DECODE(word) << mapshift;
861 			entry_vdev = SM2_VDEV_DECODE(word);
862 			entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
863 			    'A' : 'F';
864 			entry_off = (SM2_OFFSET_DECODE(extra_word) <<
865 			    mapshift) + sm->sm_start;
866 			words = 2;
867 		}
868 
869 		(void) printf("\t    [%6llu]    %c  range:"
870 		    " %010llx-%010llx  size: %06llx vdev: %06llu words: %u\n",
871 		    (u_longlong_t)entry_id,
872 		    entry_type, (u_longlong_t)entry_off,
873 		    (u_longlong_t)(entry_off + entry_run),
874 		    (u_longlong_t)entry_run,
875 		    (u_longlong_t)entry_vdev, words);
876 
877 		if (entry_type == 'A')
878 			alloc += entry_run;
879 		else
880 			alloc -= entry_run;
881 		entry_id++;
882 	}
883 	if (alloc != space_map_allocated(sm)) {
884 		(void) printf("space_map_object alloc (%lld) INCONSISTENT "
885 		    "with space map summary (%lld)\n",
886 		    (longlong_t)space_map_allocated(sm), (longlong_t)alloc);
887 	}
888 }
889 
890 static void
891 dump_metaslab_stats(metaslab_t *msp)
892 {
893 	char maxbuf[32];
894 	range_tree_t *rt = msp->ms_allocatable;
895 	zfs_btree_t *t = &msp->ms_allocatable_by_size;
896 	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
897 
898 	/* max sure nicenum has enough space */
899 	CTASSERT(sizeof (maxbuf) >= NN_NUMBUF_SZ);
900 
901 	zdb_nicenum(metaslab_largest_allocatable(msp), maxbuf, sizeof (maxbuf));
902 
903 	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
904 	    "segments", zfs_btree_numnodes(t), "maxsize", maxbuf,
905 	    "freepct", free_pct);
906 	(void) printf("\tIn-memory histogram:\n");
907 	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
908 }
909 
910 static void
911 dump_metaslab(metaslab_t *msp)
912 {
913 	vdev_t *vd = msp->ms_group->mg_vd;
914 	spa_t *spa = vd->vdev_spa;
915 	space_map_t *sm = msp->ms_sm;
916 	char freebuf[32];
917 
918 	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf,
919 	    sizeof (freebuf));
920 
921 	(void) printf(
922 	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
923 	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
924 	    (u_longlong_t)space_map_object(sm), freebuf);
925 
926 	if (dump_opt['m'] > 2 && !dump_opt['L']) {
927 		mutex_enter(&msp->ms_lock);
928 		VERIFY0(metaslab_load(msp));
929 		range_tree_stat_verify(msp->ms_allocatable);
930 		dump_metaslab_stats(msp);
931 		metaslab_unload(msp);
932 		mutex_exit(&msp->ms_lock);
933 	}
934 
935 	if (dump_opt['m'] > 1 && sm != NULL &&
936 	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
937 		/*
938 		 * The space map histogram represents free space in chunks
939 		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
940 		 */
941 		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
942 		    (u_longlong_t)msp->ms_fragmentation);
943 		dump_histogram(sm->sm_phys->smp_histogram,
944 		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
945 	}
946 
947 	ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
948 	dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
949 
950 	if (spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP)) {
951 		(void) printf("\tFlush data:\n\tunflushed txg=%llu\n\n",
952 		    (u_longlong_t)metaslab_unflushed_txg(msp));
953 	}
954 }
955 
956 static void
957 print_vdev_metaslab_header(vdev_t *vd)
958 {
959 	vdev_alloc_bias_t alloc_bias = vd->vdev_alloc_bias;
960 	const char *bias_str = "";
961 
962 	if (alloc_bias == VDEV_BIAS_LOG || vd->vdev_islog) {
963 		bias_str = VDEV_ALLOC_BIAS_LOG;
964 	} else if (alloc_bias == VDEV_BIAS_SPECIAL) {
965 		bias_str = VDEV_ALLOC_BIAS_SPECIAL;
966 	} else if (alloc_bias == VDEV_BIAS_DEDUP) {
967 		bias_str = VDEV_ALLOC_BIAS_DEDUP;
968 	}
969 
970 	uint64_t ms_flush_data_obj = 0;
971 	if (vd->vdev_top_zap != 0) {
972 		int error = zap_lookup(spa_meta_objset(vd->vdev_spa),
973 		    vd->vdev_top_zap, VDEV_TOP_ZAP_MS_UNFLUSHED_PHYS_TXGS,
974 		    sizeof (uint64_t), 1, &ms_flush_data_obj);
975 		if (error != ENOENT) {
976 			ASSERT0(error);
977 		}
978 	}
979 
980 	(void) printf("\tvdev %10llu   %s",
981 	    (u_longlong_t)vd->vdev_id, bias_str);
982 
983 	if (ms_flush_data_obj != 0) {
984 		(void) printf("   ms_unflushed_phys object %llu",
985 		    (u_longlong_t)ms_flush_data_obj);
986 	}
987 
988 	(void) printf("\n\t%-10s%5llu   %-19s   %-15s   %-12s\n",
989 	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
990 	    "offset", "spacemap", "free");
991 	(void) printf("\t%15s   %19s   %15s   %12s\n",
992 	    "---------------", "-------------------",
993 	    "---------------", "------------");
994 }
995 
996 static void
997 dump_metaslab_groups(spa_t *spa)
998 {
999 	vdev_t *rvd = spa->spa_root_vdev;
1000 	metaslab_class_t *mc = spa_normal_class(spa);
1001 	uint64_t fragmentation;
1002 
1003 	metaslab_class_histogram_verify(mc);
1004 
1005 	for (unsigned c = 0; c < rvd->vdev_children; c++) {
1006 		vdev_t *tvd = rvd->vdev_child[c];
1007 		metaslab_group_t *mg = tvd->vdev_mg;
1008 
1009 		if (mg == NULL || mg->mg_class != mc)
1010 			continue;
1011 
1012 		metaslab_group_histogram_verify(mg);
1013 		mg->mg_fragmentation = metaslab_group_fragmentation(mg);
1014 
1015 		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
1016 		    "fragmentation",
1017 		    (u_longlong_t)tvd->vdev_id,
1018 		    (u_longlong_t)tvd->vdev_ms_count);
1019 		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
1020 			(void) printf("%3s\n", "-");
1021 		} else {
1022 			(void) printf("%3llu%%\n",
1023 			    (u_longlong_t)mg->mg_fragmentation);
1024 		}
1025 		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1026 	}
1027 
1028 	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
1029 	fragmentation = metaslab_class_fragmentation(mc);
1030 	if (fragmentation == ZFS_FRAG_INVALID)
1031 		(void) printf("\t%3s\n", "-");
1032 	else
1033 		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
1034 	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1035 }
1036 
1037 static void
1038 print_vdev_indirect(vdev_t *vd)
1039 {
1040 	vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
1041 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
1042 	vdev_indirect_births_t *vib = vd->vdev_indirect_births;
1043 
1044 	if (vim == NULL) {
1045 		ASSERT3P(vib, ==, NULL);
1046 		return;
1047 	}
1048 
1049 	ASSERT3U(vdev_indirect_mapping_object(vim), ==,
1050 	    vic->vic_mapping_object);
1051 	ASSERT3U(vdev_indirect_births_object(vib), ==,
1052 	    vic->vic_births_object);
1053 
1054 	(void) printf("indirect births obj %llu:\n",
1055 	    (longlong_t)vic->vic_births_object);
1056 	(void) printf("    vib_count = %llu\n",
1057 	    (longlong_t)vdev_indirect_births_count(vib));
1058 	for (uint64_t i = 0; i < vdev_indirect_births_count(vib); i++) {
1059 		vdev_indirect_birth_entry_phys_t *cur_vibe =
1060 		    &vib->vib_entries[i];
1061 		(void) printf("\toffset %llx -> txg %llu\n",
1062 		    (longlong_t)cur_vibe->vibe_offset,
1063 		    (longlong_t)cur_vibe->vibe_phys_birth_txg);
1064 	}
1065 	(void) printf("\n");
1066 
1067 	(void) printf("indirect mapping obj %llu:\n",
1068 	    (longlong_t)vic->vic_mapping_object);
1069 	(void) printf("    vim_max_offset = 0x%llx\n",
1070 	    (longlong_t)vdev_indirect_mapping_max_offset(vim));
1071 	(void) printf("    vim_bytes_mapped = 0x%llx\n",
1072 	    (longlong_t)vdev_indirect_mapping_bytes_mapped(vim));
1073 	(void) printf("    vim_count = %llu\n",
1074 	    (longlong_t)vdev_indirect_mapping_num_entries(vim));
1075 
1076 	if (dump_opt['d'] <= 5 && dump_opt['m'] <= 3)
1077 		return;
1078 
1079 	uint32_t *counts = vdev_indirect_mapping_load_obsolete_counts(vim);
1080 
1081 	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
1082 		vdev_indirect_mapping_entry_phys_t *vimep =
1083 		    &vim->vim_entries[i];
1084 		(void) printf("\t<%llx:%llx:%llx> -> "
1085 		    "<%llx:%llx:%llx> (%x obsolete)\n",
1086 		    (longlong_t)vd->vdev_id,
1087 		    (longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
1088 		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1089 		    (longlong_t)DVA_GET_VDEV(&vimep->vimep_dst),
1090 		    (longlong_t)DVA_GET_OFFSET(&vimep->vimep_dst),
1091 		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1092 		    counts[i]);
1093 	}
1094 	(void) printf("\n");
1095 
1096 	uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd);
1097 	if (obsolete_sm_object != 0) {
1098 		objset_t *mos = vd->vdev_spa->spa_meta_objset;
1099 		(void) printf("obsolete space map object %llu:\n",
1100 		    (u_longlong_t)obsolete_sm_object);
1101 		ASSERT(vd->vdev_obsolete_sm != NULL);
1102 		ASSERT3U(space_map_object(vd->vdev_obsolete_sm), ==,
1103 		    obsolete_sm_object);
1104 		dump_spacemap(mos, vd->vdev_obsolete_sm);
1105 		(void) printf("\n");
1106 	}
1107 }
1108 
1109 static void
1110 dump_metaslabs(spa_t *spa)
1111 {
1112 	vdev_t *vd, *rvd = spa->spa_root_vdev;
1113 	uint64_t m, c = 0, children = rvd->vdev_children;
1114 
1115 	(void) printf("\nMetaslabs:\n");
1116 
1117 	if (!dump_opt['d'] && zopt_objects > 0) {
1118 		c = zopt_object[0];
1119 
1120 		if (c >= children)
1121 			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
1122 
1123 		if (zopt_objects > 1) {
1124 			vd = rvd->vdev_child[c];
1125 			print_vdev_metaslab_header(vd);
1126 
1127 			for (m = 1; m < zopt_objects; m++) {
1128 				if (zopt_object[m] < vd->vdev_ms_count)
1129 					dump_metaslab(
1130 					    vd->vdev_ms[zopt_object[m]]);
1131 				else
1132 					(void) fprintf(stderr, "bad metaslab "
1133 					    "number %llu\n",
1134 					    (u_longlong_t)zopt_object[m]);
1135 			}
1136 			(void) printf("\n");
1137 			return;
1138 		}
1139 		children = c + 1;
1140 	}
1141 	for (; c < children; c++) {
1142 		vd = rvd->vdev_child[c];
1143 		print_vdev_metaslab_header(vd);
1144 
1145 		print_vdev_indirect(vd);
1146 
1147 		for (m = 0; m < vd->vdev_ms_count; m++)
1148 			dump_metaslab(vd->vdev_ms[m]);
1149 		(void) printf("\n");
1150 	}
1151 }
1152 
1153 static void
1154 dump_log_spacemaps(spa_t *spa)
1155 {
1156 	if (!spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP))
1157 		return;
1158 
1159 	(void) printf("\nLog Space Maps in Pool:\n");
1160 	for (spa_log_sm_t *sls = avl_first(&spa->spa_sm_logs_by_txg);
1161 	    sls; sls = AVL_NEXT(&spa->spa_sm_logs_by_txg, sls)) {
1162 		space_map_t *sm = NULL;
1163 		VERIFY0(space_map_open(&sm, spa_meta_objset(spa),
1164 		    sls->sls_sm_obj, 0, UINT64_MAX, SPA_MINBLOCKSHIFT));
1165 
1166 		(void) printf("Log Spacemap object %llu txg %llu\n",
1167 		    (u_longlong_t)sls->sls_sm_obj, (u_longlong_t)sls->sls_txg);
1168 		dump_spacemap(spa->spa_meta_objset, sm);
1169 		space_map_close(sm);
1170 	}
1171 	(void) printf("\n");
1172 }
1173 
1174 static void
1175 dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
1176 {
1177 	const ddt_phys_t *ddp = dde->dde_phys;
1178 	const ddt_key_t *ddk = &dde->dde_key;
1179 	const char *types[4] = { "ditto", "single", "double", "triple" };
1180 	char blkbuf[BP_SPRINTF_LEN];
1181 	blkptr_t blk;
1182 
1183 	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
1184 		if (ddp->ddp_phys_birth == 0)
1185 			continue;
1186 		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
1187 		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
1188 		(void) printf("index %llx refcnt %llu %s %s\n",
1189 		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
1190 		    types[p], blkbuf);
1191 	}
1192 }
1193 
1194 static void
1195 dump_dedup_ratio(const ddt_stat_t *dds)
1196 {
1197 	double rL, rP, rD, D, dedup, compress, copies;
1198 
1199 	if (dds->dds_blocks == 0)
1200 		return;
1201 
1202 	rL = (double)dds->dds_ref_lsize;
1203 	rP = (double)dds->dds_ref_psize;
1204 	rD = (double)dds->dds_ref_dsize;
1205 	D = (double)dds->dds_dsize;
1206 
1207 	dedup = rD / D;
1208 	compress = rL / rP;
1209 	copies = rD / rP;
1210 
1211 	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
1212 	    "dedup * compress / copies = %.2f\n\n",
1213 	    dedup, compress, copies, dedup * compress / copies);
1214 }
1215 
1216 static void
1217 dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
1218 {
1219 	char name[DDT_NAMELEN];
1220 	ddt_entry_t dde;
1221 	uint64_t walk = 0;
1222 	dmu_object_info_t doi;
1223 	uint64_t count, dspace, mspace;
1224 	int error;
1225 
1226 	error = ddt_object_info(ddt, type, class, &doi);
1227 
1228 	if (error == ENOENT)
1229 		return;
1230 	ASSERT(error == 0);
1231 
1232 	if ((count = ddt_object_count(ddt, type, class)) == 0)
1233 		return;
1234 
1235 	dspace = doi.doi_physical_blocks_512 << 9;
1236 	mspace = doi.doi_fill_count * doi.doi_data_block_size;
1237 
1238 	ddt_object_name(ddt, type, class, name);
1239 
1240 	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
1241 	    name,
1242 	    (u_longlong_t)count,
1243 	    (u_longlong_t)(dspace / count),
1244 	    (u_longlong_t)(mspace / count));
1245 
1246 	if (dump_opt['D'] < 3)
1247 		return;
1248 
1249 	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
1250 
1251 	if (dump_opt['D'] < 4)
1252 		return;
1253 
1254 	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
1255 		return;
1256 
1257 	(void) printf("%s contents:\n\n", name);
1258 
1259 	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
1260 		dump_dde(ddt, &dde, walk);
1261 
1262 	ASSERT3U(error, ==, ENOENT);
1263 
1264 	(void) printf("\n");
1265 }
1266 
1267 static void
1268 dump_all_ddts(spa_t *spa)
1269 {
1270 	ddt_histogram_t ddh_total;
1271 	ddt_stat_t dds_total;
1272 
1273 	bzero(&ddh_total, sizeof (ddh_total));
1274 	bzero(&dds_total, sizeof (dds_total));
1275 
1276 	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
1277 		ddt_t *ddt = spa->spa_ddt[c];
1278 		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
1279 			for (enum ddt_class class = 0; class < DDT_CLASSES;
1280 			    class++) {
1281 				dump_ddt(ddt, type, class);
1282 			}
1283 		}
1284 	}
1285 
1286 	ddt_get_dedup_stats(spa, &dds_total);
1287 
1288 	if (dds_total.dds_blocks == 0) {
1289 		(void) printf("All DDTs are empty\n");
1290 		return;
1291 	}
1292 
1293 	(void) printf("\n");
1294 
1295 	if (dump_opt['D'] > 1) {
1296 		(void) printf("DDT histogram (aggregated over all DDTs):\n");
1297 		ddt_get_dedup_histogram(spa, &ddh_total);
1298 		zpool_dump_ddt(&dds_total, &ddh_total);
1299 	}
1300 
1301 	dump_dedup_ratio(&dds_total);
1302 }
1303 
1304 static void
1305 dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1306 {
1307 	char *prefix = arg;
1308 
1309 	(void) printf("%s [%llu,%llu) length %llu\n",
1310 	    prefix,
1311 	    (u_longlong_t)start,
1312 	    (u_longlong_t)(start + size),
1313 	    (u_longlong_t)(size));
1314 }
1315 
1316 static void
1317 dump_dtl(vdev_t *vd, int indent)
1318 {
1319 	spa_t *spa = vd->vdev_spa;
1320 	boolean_t required;
1321 	const char *name[DTL_TYPES] = { "missing", "partial", "scrub",
1322 		"outage" };
1323 	char prefix[256];
1324 
1325 	spa_vdev_state_enter(spa, SCL_NONE);
1326 	required = vdev_dtl_required(vd);
1327 	(void) spa_vdev_state_exit(spa, NULL, 0);
1328 
1329 	if (indent == 0)
1330 		(void) printf("\nDirty time logs:\n\n");
1331 
1332 	(void) printf("\t%*s%s [%s]\n", indent, "",
1333 	    vd->vdev_path ? vd->vdev_path :
1334 	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1335 	    required ? "DTL-required" : "DTL-expendable");
1336 
1337 	for (int t = 0; t < DTL_TYPES; t++) {
1338 		range_tree_t *rt = vd->vdev_dtl[t];
1339 		if (range_tree_space(rt) == 0)
1340 			continue;
1341 		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1342 		    indent + 2, "", name[t]);
1343 		range_tree_walk(rt, dump_dtl_seg, prefix);
1344 		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1345 			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1346 	}
1347 
1348 	for (unsigned c = 0; c < vd->vdev_children; c++)
1349 		dump_dtl(vd->vdev_child[c], indent + 4);
1350 }
1351 
1352 static void
1353 dump_history(spa_t *spa)
1354 {
1355 	nvlist_t **events = NULL;
1356 	uint64_t resid, len, off = 0;
1357 	uint_t num = 0;
1358 	int error;
1359 	time_t tsec;
1360 	struct tm t;
1361 	char tbuf[30];
1362 	char internalstr[MAXPATHLEN];
1363 
1364 	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
1365 	do {
1366 		len = SPA_MAXBLOCKSIZE;
1367 
1368 		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1369 			(void) fprintf(stderr, "Unable to read history: "
1370 			    "error %d\n", error);
1371 			umem_free(buf, SPA_MAXBLOCKSIZE);
1372 			return;
1373 		}
1374 
1375 		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1376 			break;
1377 
1378 		off -= resid;
1379 	} while (len != 0);
1380 	umem_free(buf, SPA_MAXBLOCKSIZE);
1381 
1382 	(void) printf("\nHistory:\n");
1383 	for (unsigned i = 0; i < num; i++) {
1384 		uint64_t time, txg, ievent;
1385 		char *cmd, *intstr;
1386 		boolean_t printed = B_FALSE;
1387 
1388 		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1389 		    &time) != 0)
1390 			goto next;
1391 		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1392 		    &cmd) != 0) {
1393 			if (nvlist_lookup_uint64(events[i],
1394 			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1395 				goto next;
1396 			verify(nvlist_lookup_uint64(events[i],
1397 			    ZPOOL_HIST_TXG, &txg) == 0);
1398 			verify(nvlist_lookup_string(events[i],
1399 			    ZPOOL_HIST_INT_STR, &intstr) == 0);
1400 			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1401 				goto next;
1402 
1403 			(void) snprintf(internalstr,
1404 			    sizeof (internalstr),
1405 			    "[internal %s txg:%ju] %s",
1406 			    zfs_history_event_names[ievent], (uintmax_t)txg,
1407 			    intstr);
1408 			cmd = internalstr;
1409 		}
1410 		tsec = time;
1411 		(void) localtime_r(&tsec, &t);
1412 		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1413 		(void) printf("%s %s\n", tbuf, cmd);
1414 		printed = B_TRUE;
1415 
1416 next:
1417 		if (dump_opt['h'] > 1) {
1418 			if (!printed)
1419 				(void) printf("unrecognized record:\n");
1420 			dump_nvlist(events[i], 2);
1421 		}
1422 	}
1423 }
1424 
1425 /*ARGSUSED*/
1426 static void
1427 dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1428 {
1429 }
1430 
1431 static uint64_t
1432 blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1433     const zbookmark_phys_t *zb)
1434 {
1435 	if (dnp == NULL) {
1436 		ASSERT(zb->zb_level < 0);
1437 		if (zb->zb_object == 0)
1438 			return (zb->zb_blkid);
1439 		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1440 	}
1441 
1442 	ASSERT(zb->zb_level >= 0);
1443 
1444 	return ((zb->zb_blkid <<
1445 	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1446 	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1447 }
1448 
1449 static void
1450 snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1451 {
1452 	const dva_t *dva = bp->blk_dva;
1453 	unsigned int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1454 
1455 	if (dump_opt['b'] >= 6) {
1456 		snprintf_blkptr(blkbuf, buflen, bp);
1457 		return;
1458 	}
1459 
1460 	if (BP_IS_EMBEDDED(bp)) {
1461 		(void) sprintf(blkbuf,
1462 		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
1463 		    (int)BPE_GET_ETYPE(bp),
1464 		    (u_longlong_t)BPE_GET_LSIZE(bp),
1465 		    (u_longlong_t)BPE_GET_PSIZE(bp),
1466 		    (u_longlong_t)bp->blk_birth);
1467 		return;
1468 	}
1469 
1470 	blkbuf[0] = '\0';
1471 	for (unsigned int i = 0; i < ndvas; i++)
1472 		(void) snprintf(blkbuf + strlen(blkbuf),
1473 		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1474 		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1475 		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1476 		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1477 
1478 	if (BP_IS_HOLE(bp)) {
1479 		(void) snprintf(blkbuf + strlen(blkbuf),
1480 		    buflen - strlen(blkbuf),
1481 		    "%llxL B=%llu",
1482 		    (u_longlong_t)BP_GET_LSIZE(bp),
1483 		    (u_longlong_t)bp->blk_birth);
1484 	} else {
1485 		(void) snprintf(blkbuf + strlen(blkbuf),
1486 		    buflen - strlen(blkbuf),
1487 		    "%llxL/%llxP F=%llu B=%llu/%llu",
1488 		    (u_longlong_t)BP_GET_LSIZE(bp),
1489 		    (u_longlong_t)BP_GET_PSIZE(bp),
1490 		    (u_longlong_t)BP_GET_FILL(bp),
1491 		    (u_longlong_t)bp->blk_birth,
1492 		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1493 	}
1494 }
1495 
1496 static void
1497 print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1498     const dnode_phys_t *dnp)
1499 {
1500 	char blkbuf[BP_SPRINTF_LEN];
1501 	int l;
1502 
1503 	if (!BP_IS_EMBEDDED(bp)) {
1504 		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1505 		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1506 	}
1507 
1508 	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1509 
1510 	ASSERT(zb->zb_level >= 0);
1511 
1512 	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1513 		if (l == zb->zb_level) {
1514 			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1515 		} else {
1516 			(void) printf(" ");
1517 		}
1518 	}
1519 
1520 	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1521 	(void) printf("%s\n", blkbuf);
1522 }
1523 
1524 static int
1525 visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1526     blkptr_t *bp, const zbookmark_phys_t *zb)
1527 {
1528 	int err = 0;
1529 
1530 	if (bp->blk_birth == 0)
1531 		return (0);
1532 
1533 	print_indirect(bp, zb, dnp);
1534 
1535 	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1536 		arc_flags_t flags = ARC_FLAG_WAIT;
1537 		int i;
1538 		blkptr_t *cbp;
1539 		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1540 		arc_buf_t *buf;
1541 		uint64_t fill = 0;
1542 
1543 		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1544 		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1545 		if (err)
1546 			return (err);
1547 		ASSERT(buf->b_data);
1548 
1549 		/* recursively visit blocks below this */
1550 		cbp = buf->b_data;
1551 		for (i = 0; i < epb; i++, cbp++) {
1552 			zbookmark_phys_t czb;
1553 
1554 			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1555 			    zb->zb_level - 1,
1556 			    zb->zb_blkid * epb + i);
1557 			err = visit_indirect(spa, dnp, cbp, &czb);
1558 			if (err)
1559 				break;
1560 			fill += BP_GET_FILL(cbp);
1561 		}
1562 		if (!err)
1563 			ASSERT3U(fill, ==, BP_GET_FILL(bp));
1564 		arc_buf_destroy(buf, &buf);
1565 	}
1566 
1567 	return (err);
1568 }
1569 
1570 /*ARGSUSED*/
1571 static void
1572 dump_indirect(dnode_t *dn)
1573 {
1574 	dnode_phys_t *dnp = dn->dn_phys;
1575 	int j;
1576 	zbookmark_phys_t czb;
1577 
1578 	(void) printf("Indirect blocks:\n");
1579 
1580 	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1581 	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1582 	for (j = 0; j < dnp->dn_nblkptr; j++) {
1583 		czb.zb_blkid = j;
1584 		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1585 		    &dnp->dn_blkptr[j], &czb);
1586 	}
1587 
1588 	(void) printf("\n");
1589 }
1590 
1591 /*ARGSUSED*/
1592 static void
1593 dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1594 {
1595 	dsl_dir_phys_t *dd = data;
1596 	time_t crtime;
1597 	char nice[32];
1598 
1599 	/* make sure nicenum has enough space */
1600 	CTASSERT(sizeof (nice) >= NN_NUMBUF_SZ);
1601 
1602 	if (dd == NULL)
1603 		return;
1604 
1605 	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1606 
1607 	crtime = dd->dd_creation_time;
1608 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1609 	(void) printf("\t\thead_dataset_obj = %llu\n",
1610 	    (u_longlong_t)dd->dd_head_dataset_obj);
1611 	(void) printf("\t\tparent_dir_obj = %llu\n",
1612 	    (u_longlong_t)dd->dd_parent_obj);
1613 	(void) printf("\t\torigin_obj = %llu\n",
1614 	    (u_longlong_t)dd->dd_origin_obj);
1615 	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1616 	    (u_longlong_t)dd->dd_child_dir_zapobj);
1617 	zdb_nicenum(dd->dd_used_bytes, nice, sizeof (nice));
1618 	(void) printf("\t\tused_bytes = %s\n", nice);
1619 	zdb_nicenum(dd->dd_compressed_bytes, nice, sizeof (nice));
1620 	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1621 	zdb_nicenum(dd->dd_uncompressed_bytes, nice, sizeof (nice));
1622 	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1623 	zdb_nicenum(dd->dd_quota, nice, sizeof (nice));
1624 	(void) printf("\t\tquota = %s\n", nice);
1625 	zdb_nicenum(dd->dd_reserved, nice, sizeof (nice));
1626 	(void) printf("\t\treserved = %s\n", nice);
1627 	(void) printf("\t\tprops_zapobj = %llu\n",
1628 	    (u_longlong_t)dd->dd_props_zapobj);
1629 	(void) printf("\t\tdeleg_zapobj = %llu\n",
1630 	    (u_longlong_t)dd->dd_deleg_zapobj);
1631 	(void) printf("\t\tflags = %llx\n",
1632 	    (u_longlong_t)dd->dd_flags);
1633 
1634 #define	DO(which) \
1635 	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice, \
1636 	    sizeof (nice)); \
1637 	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1638 	DO(HEAD);
1639 	DO(SNAP);
1640 	DO(CHILD);
1641 	DO(CHILD_RSRV);
1642 	DO(REFRSRV);
1643 #undef DO
1644 	(void) printf("\t\tclones = %llu\n",
1645 	    (u_longlong_t)dd->dd_clones);
1646 }
1647 
1648 /*ARGSUSED*/
1649 static void
1650 dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1651 {
1652 	dsl_dataset_phys_t *ds = data;
1653 	time_t crtime;
1654 	char used[32], compressed[32], uncompressed[32], unique[32];
1655 	char blkbuf[BP_SPRINTF_LEN];
1656 
1657 	/* make sure nicenum has enough space */
1658 	CTASSERT(sizeof (used) >= NN_NUMBUF_SZ);
1659 	CTASSERT(sizeof (compressed) >= NN_NUMBUF_SZ);
1660 	CTASSERT(sizeof (uncompressed) >= NN_NUMBUF_SZ);
1661 	CTASSERT(sizeof (unique) >= NN_NUMBUF_SZ);
1662 
1663 	if (ds == NULL)
1664 		return;
1665 
1666 	ASSERT(size == sizeof (*ds));
1667 	crtime = ds->ds_creation_time;
1668 	zdb_nicenum(ds->ds_referenced_bytes, used, sizeof (used));
1669 	zdb_nicenum(ds->ds_compressed_bytes, compressed, sizeof (compressed));
1670 	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed,
1671 	    sizeof (uncompressed));
1672 	zdb_nicenum(ds->ds_unique_bytes, unique, sizeof (unique));
1673 	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1674 
1675 	(void) printf("\t\tdir_obj = %llu\n",
1676 	    (u_longlong_t)ds->ds_dir_obj);
1677 	(void) printf("\t\tprev_snap_obj = %llu\n",
1678 	    (u_longlong_t)ds->ds_prev_snap_obj);
1679 	(void) printf("\t\tprev_snap_txg = %llu\n",
1680 	    (u_longlong_t)ds->ds_prev_snap_txg);
1681 	(void) printf("\t\tnext_snap_obj = %llu\n",
1682 	    (u_longlong_t)ds->ds_next_snap_obj);
1683 	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1684 	    (u_longlong_t)ds->ds_snapnames_zapobj);
1685 	(void) printf("\t\tnum_children = %llu\n",
1686 	    (u_longlong_t)ds->ds_num_children);
1687 	(void) printf("\t\tuserrefs_obj = %llu\n",
1688 	    (u_longlong_t)ds->ds_userrefs_obj);
1689 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1690 	(void) printf("\t\tcreation_txg = %llu\n",
1691 	    (u_longlong_t)ds->ds_creation_txg);
1692 	(void) printf("\t\tdeadlist_obj = %llu\n",
1693 	    (u_longlong_t)ds->ds_deadlist_obj);
1694 	(void) printf("\t\tused_bytes = %s\n", used);
1695 	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1696 	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1697 	(void) printf("\t\tunique = %s\n", unique);
1698 	(void) printf("\t\tfsid_guid = %llu\n",
1699 	    (u_longlong_t)ds->ds_fsid_guid);
1700 	(void) printf("\t\tguid = %llu\n",
1701 	    (u_longlong_t)ds->ds_guid);
1702 	(void) printf("\t\tflags = %llx\n",
1703 	    (u_longlong_t)ds->ds_flags);
1704 	(void) printf("\t\tnext_clones_obj = %llu\n",
1705 	    (u_longlong_t)ds->ds_next_clones_obj);
1706 	(void) printf("\t\tprops_obj = %llu\n",
1707 	    (u_longlong_t)ds->ds_props_obj);
1708 	(void) printf("\t\tbp = %s\n", blkbuf);
1709 }
1710 
1711 /* ARGSUSED */
1712 static int
1713 dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1714 {
1715 	char blkbuf[BP_SPRINTF_LEN];
1716 
1717 	if (bp->blk_birth != 0) {
1718 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1719 		(void) printf("\t%s\n", blkbuf);
1720 	}
1721 	return (0);
1722 }
1723 
1724 static void
1725 dump_bptree(objset_t *os, uint64_t obj, const char *name)
1726 {
1727 	char bytes[32];
1728 	bptree_phys_t *bt;
1729 	dmu_buf_t *db;
1730 
1731 	/* make sure nicenum has enough space */
1732 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1733 
1734 	if (dump_opt['d'] < 3)
1735 		return;
1736 
1737 	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1738 	bt = db->db_data;
1739 	zdb_nicenum(bt->bt_bytes, bytes, sizeof (bytes));
1740 	(void) printf("\n    %s: %llu datasets, %s\n",
1741 	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1742 	dmu_buf_rele(db, FTAG);
1743 
1744 	if (dump_opt['d'] < 5)
1745 		return;
1746 
1747 	(void) printf("\n");
1748 
1749 	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1750 }
1751 
1752 /* ARGSUSED */
1753 static int
1754 dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1755 {
1756 	char blkbuf[BP_SPRINTF_LEN];
1757 
1758 	ASSERT(bp->blk_birth != 0);
1759 	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1760 	(void) printf("\t%s\n", blkbuf);
1761 	return (0);
1762 }
1763 
1764 static void
1765 dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
1766 {
1767 	char bytes[32];
1768 	char comp[32];
1769 	char uncomp[32];
1770 
1771 	/* make sure nicenum has enough space */
1772 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1773 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1774 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1775 
1776 	if (dump_opt['d'] < 3)
1777 		return;
1778 
1779 	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes, sizeof (bytes));
1780 	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1781 		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp, sizeof (comp));
1782 		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp, sizeof (uncomp));
1783 		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1784 		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1785 		    indent * 8, name,
1786 		    (u_longlong_t)bpo->bpo_object,
1787 		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1788 		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1789 		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1790 		    bytes, comp, uncomp);
1791 
1792 		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1793 			uint64_t subobj;
1794 			bpobj_t subbpo;
1795 			int error;
1796 			VERIFY0(dmu_read(bpo->bpo_os,
1797 			    bpo->bpo_phys->bpo_subobjs,
1798 			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1799 			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1800 			if (error != 0) {
1801 				(void) printf("ERROR %u while trying to open "
1802 				    "subobj id %llu\n",
1803 				    error, (u_longlong_t)subobj);
1804 				continue;
1805 			}
1806 			dump_full_bpobj(&subbpo, "subobj", indent + 1);
1807 			bpobj_close(&subbpo);
1808 		}
1809 	} else {
1810 		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1811 		    indent * 8, name,
1812 		    (u_longlong_t)bpo->bpo_object,
1813 		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1814 		    bytes);
1815 	}
1816 
1817 	if (dump_opt['d'] < 5)
1818 		return;
1819 
1820 
1821 	if (indent == 0) {
1822 		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1823 		(void) printf("\n");
1824 	}
1825 }
1826 
1827 static void
1828 bpobj_count_refd(bpobj_t *bpo)
1829 {
1830 	mos_obj_refd(bpo->bpo_object);
1831 
1832 	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1833 		mos_obj_refd(bpo->bpo_phys->bpo_subobjs);
1834 		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1835 			uint64_t subobj;
1836 			bpobj_t subbpo;
1837 			int error;
1838 			VERIFY0(dmu_read(bpo->bpo_os,
1839 			    bpo->bpo_phys->bpo_subobjs,
1840 			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1841 			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1842 			if (error != 0) {
1843 				(void) printf("ERROR %u while trying to open "
1844 				    "subobj id %llu\n",
1845 				    error, (u_longlong_t)subobj);
1846 				continue;
1847 			}
1848 			bpobj_count_refd(&subbpo);
1849 			bpobj_close(&subbpo);
1850 		}
1851 	}
1852 }
1853 
1854 static void
1855 dump_deadlist(dsl_deadlist_t *dl)
1856 {
1857 	dsl_deadlist_entry_t *dle;
1858 	uint64_t unused;
1859 	char bytes[32];
1860 	char comp[32];
1861 	char uncomp[32];
1862 	uint64_t empty_bpobj =
1863 	    dmu_objset_spa(dl->dl_os)->spa_dsl_pool->dp_empty_bpobj;
1864 
1865 	/* force the tree to be loaded */
1866 	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1867 
1868 	if (dl->dl_oldfmt) {
1869 		if (dl->dl_bpobj.bpo_object != empty_bpobj)
1870 			bpobj_count_refd(&dl->dl_bpobj);
1871 	} else {
1872 		mos_obj_refd(dl->dl_object);
1873 		for (dle = avl_first(&dl->dl_tree); dle;
1874 		    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1875 			if (dle->dle_bpobj.bpo_object != empty_bpobj)
1876 				bpobj_count_refd(&dle->dle_bpobj);
1877 		}
1878 	}
1879 
1880 	/* make sure nicenum has enough space */
1881 	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1882 	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1883 	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1884 
1885 	if (dump_opt['d'] < 3)
1886 		return;
1887 
1888 	if (dl->dl_oldfmt) {
1889 		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1890 		return;
1891 	}
1892 
1893 	zdb_nicenum(dl->dl_phys->dl_used, bytes, sizeof (bytes));
1894 	zdb_nicenum(dl->dl_phys->dl_comp, comp, sizeof (comp));
1895 	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp, sizeof (uncomp));
1896 	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1897 	    bytes, comp, uncomp);
1898 
1899 	if (dump_opt['d'] < 4)
1900 		return;
1901 
1902 	(void) printf("\n");
1903 
1904 	for (dle = avl_first(&dl->dl_tree); dle;
1905 	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1906 		if (dump_opt['d'] >= 5) {
1907 			char buf[128];
1908 			(void) snprintf(buf, sizeof (buf),
1909 			    "mintxg %llu -> obj %llu",
1910 			    (longlong_t)dle->dle_mintxg,
1911 			    (longlong_t)dle->dle_bpobj.bpo_object);
1912 
1913 			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1914 		} else {
1915 			(void) printf("mintxg %llu -> obj %llu\n",
1916 			    (longlong_t)dle->dle_mintxg,
1917 			    (longlong_t)dle->dle_bpobj.bpo_object);
1918 		}
1919 	}
1920 }
1921 
1922 static avl_tree_t idx_tree;
1923 static avl_tree_t domain_tree;
1924 static boolean_t fuid_table_loaded;
1925 static objset_t *sa_os = NULL;
1926 static sa_attr_type_t *sa_attr_table = NULL;
1927 
1928 static int
1929 open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
1930 {
1931 	int err;
1932 	uint64_t sa_attrs = 0;
1933 	uint64_t version = 0;
1934 
1935 	VERIFY3P(sa_os, ==, NULL);
1936 	err = dmu_objset_own(path, type, B_TRUE, B_FALSE, tag, osp);
1937 	if (err != 0) {
1938 		(void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
1939 		    strerror(err));
1940 		return (err);
1941 	}
1942 
1943 	if (dmu_objset_type(*osp) == DMU_OST_ZFS && !(*osp)->os_encrypted) {
1944 		(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1945 		    8, 1, &version);
1946 		if (version >= ZPL_VERSION_SA) {
1947 			(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1948 			    8, 1, &sa_attrs);
1949 		}
1950 		err = sa_setup(*osp, sa_attrs, zfs_attr_table, ZPL_END,
1951 		    &sa_attr_table);
1952 		if (err != 0) {
1953 			(void) fprintf(stderr, "sa_setup failed: %s\n",
1954 			    strerror(err));
1955 			dmu_objset_disown(*osp, B_FALSE, tag);
1956 			*osp = NULL;
1957 		}
1958 	}
1959 	sa_os = *osp;
1960 
1961 	return (0);
1962 }
1963 
1964 static void
1965 close_objset(objset_t *os, void *tag)
1966 {
1967 	VERIFY3P(os, ==, sa_os);
1968 	if (os->os_sa != NULL)
1969 		sa_tear_down(os);
1970 	dmu_objset_disown(os, B_FALSE, tag);
1971 	sa_attr_table = NULL;
1972 	sa_os = NULL;
1973 }
1974 
1975 static void
1976 fuid_table_destroy()
1977 {
1978 	if (fuid_table_loaded) {
1979 		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1980 		fuid_table_loaded = B_FALSE;
1981 	}
1982 }
1983 
1984 /*
1985  * print uid or gid information.
1986  * For normal POSIX id just the id is printed in decimal format.
1987  * For CIFS files with FUID the fuid is printed in hex followed by
1988  * the domain-rid string.
1989  */
1990 static void
1991 print_idstr(uint64_t id, const char *id_type)
1992 {
1993 	if (FUID_INDEX(id)) {
1994 		char *domain;
1995 
1996 		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1997 		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1998 		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1999 	} else {
2000 		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
2001 	}
2002 
2003 }
2004 
2005 static void
2006 dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
2007 {
2008 	uint32_t uid_idx, gid_idx;
2009 
2010 	uid_idx = FUID_INDEX(uid);
2011 	gid_idx = FUID_INDEX(gid);
2012 
2013 	/* Load domain table, if not already loaded */
2014 	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
2015 		uint64_t fuid_obj;
2016 
2017 		/* first find the fuid object.  It lives in the master node */
2018 		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
2019 		    8, 1, &fuid_obj) == 0);
2020 		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
2021 		(void) zfs_fuid_table_load(os, fuid_obj,
2022 		    &idx_tree, &domain_tree);
2023 		fuid_table_loaded = B_TRUE;
2024 	}
2025 
2026 	print_idstr(uid, "uid");
2027 	print_idstr(gid, "gid");
2028 }
2029 
2030 /*ARGSUSED*/
2031 static void
2032 dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
2033 {
2034 	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
2035 	sa_handle_t *hdl;
2036 	uint64_t xattr, rdev, gen;
2037 	uint64_t uid, gid, mode, fsize, parent, links;
2038 	uint64_t pflags;
2039 	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
2040 	time_t z_crtime, z_atime, z_mtime, z_ctime;
2041 	sa_bulk_attr_t bulk[12];
2042 	int idx = 0;
2043 	int error;
2044 
2045 	VERIFY3P(os, ==, sa_os);
2046 	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
2047 		(void) printf("Failed to get handle for SA znode\n");
2048 		return;
2049 	}
2050 
2051 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
2052 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
2053 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
2054 	    &links, 8);
2055 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
2056 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
2057 	    &mode, 8);
2058 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
2059 	    NULL, &parent, 8);
2060 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
2061 	    &fsize, 8);
2062 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
2063 	    acctm, 16);
2064 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
2065 	    modtm, 16);
2066 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
2067 	    crtm, 16);
2068 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
2069 	    chgtm, 16);
2070 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
2071 	    &pflags, 8);
2072 
2073 	if (sa_bulk_lookup(hdl, bulk, idx)) {
2074 		(void) sa_handle_destroy(hdl);
2075 		return;
2076 	}
2077 
2078 	z_crtime = (time_t)crtm[0];
2079 	z_atime = (time_t)acctm[0];
2080 	z_mtime = (time_t)modtm[0];
2081 	z_ctime = (time_t)chgtm[0];
2082 
2083 	if (dump_opt['d'] > 4) {
2084 		error = zfs_obj_to_path(os, object, path, sizeof (path));
2085 		if (error == ESTALE) {
2086 			(void) snprintf(path, sizeof (path), "on delete queue");
2087 		} else if (error != 0) {
2088 			leaked_objects++;
2089 			(void) snprintf(path, sizeof (path),
2090 			    "path not found, possibly leaked");
2091 		}
2092 		(void) printf("\tpath	%s\n", path);
2093 	}
2094 	dump_uidgid(os, uid, gid);
2095 	(void) printf("\tatime	%s", ctime(&z_atime));
2096 	(void) printf("\tmtime	%s", ctime(&z_mtime));
2097 	(void) printf("\tctime	%s", ctime(&z_ctime));
2098 	(void) printf("\tcrtime	%s", ctime(&z_crtime));
2099 	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
2100 	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
2101 	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
2102 	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
2103 	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
2104 	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
2105 	if (dmu_objset_projectquota_enabled(os) && (pflags & ZFS_PROJID)) {
2106 		uint64_t projid;
2107 
2108 		if (sa_lookup(hdl, sa_attr_table[ZPL_PROJID], &projid,
2109 		    sizeof (uint64_t)) == 0)
2110 			(void) printf("\tprojid	%llu\n", (u_longlong_t)projid);
2111 	}
2112 	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
2113 	    sizeof (uint64_t)) == 0)
2114 		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
2115 	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
2116 	    sizeof (uint64_t)) == 0)
2117 		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
2118 	sa_handle_destroy(hdl);
2119 }
2120 
2121 /*ARGSUSED*/
2122 static void
2123 dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
2124 {
2125 }
2126 
2127 /*ARGSUSED*/
2128 static void
2129 dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
2130 {
2131 }
2132 
2133 
2134 static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
2135 	dump_none,		/* unallocated			*/
2136 	dump_zap,		/* object directory		*/
2137 	dump_uint64,		/* object array			*/
2138 	dump_none,		/* packed nvlist		*/
2139 	dump_packed_nvlist,	/* packed nvlist size		*/
2140 	dump_none,		/* bpobj			*/
2141 	dump_bpobj,		/* bpobj header			*/
2142 	dump_none,		/* SPA space map header		*/
2143 	dump_none,		/* SPA space map		*/
2144 	dump_none,		/* ZIL intent log		*/
2145 	dump_dnode,		/* DMU dnode			*/
2146 	dump_dmu_objset,	/* DMU objset			*/
2147 	dump_dsl_dir,		/* DSL directory		*/
2148 	dump_zap,		/* DSL directory child map	*/
2149 	dump_zap,		/* DSL dataset snap map		*/
2150 	dump_zap,		/* DSL props			*/
2151 	dump_dsl_dataset,	/* DSL dataset			*/
2152 	dump_znode,		/* ZFS znode			*/
2153 	dump_acl,		/* ZFS V0 ACL			*/
2154 	dump_uint8,		/* ZFS plain file		*/
2155 	dump_zpldir,		/* ZFS directory		*/
2156 	dump_zap,		/* ZFS master node		*/
2157 	dump_zap,		/* ZFS delete queue		*/
2158 	dump_uint8,		/* zvol object			*/
2159 	dump_zap,		/* zvol prop			*/
2160 	dump_uint8,		/* other uint8[]		*/
2161 	dump_uint64,		/* other uint64[]		*/
2162 	dump_zap,		/* other ZAP			*/
2163 	dump_zap,		/* persistent error log		*/
2164 	dump_uint8,		/* SPA history			*/
2165 	dump_history_offsets,	/* SPA history offsets		*/
2166 	dump_zap,		/* Pool properties		*/
2167 	dump_zap,		/* DSL permissions		*/
2168 	dump_acl,		/* ZFS ACL			*/
2169 	dump_uint8,		/* ZFS SYSACL			*/
2170 	dump_none,		/* FUID nvlist			*/
2171 	dump_packed_nvlist,	/* FUID nvlist size		*/
2172 	dump_zap,		/* DSL dataset next clones	*/
2173 	dump_zap,		/* DSL scrub queue		*/
2174 	dump_zap,		/* ZFS user/group/project used	*/
2175 	dump_zap,		/* ZFS user/group/project quota	*/
2176 	dump_zap,		/* snapshot refcount tags	*/
2177 	dump_ddt_zap,		/* DDT ZAP object		*/
2178 	dump_zap,		/* DDT statistics		*/
2179 	dump_znode,		/* SA object			*/
2180 	dump_zap,		/* SA Master Node		*/
2181 	dump_sa_attrs,		/* SA attribute registration	*/
2182 	dump_sa_layouts,	/* SA attribute layouts		*/
2183 	dump_zap,		/* DSL scrub translations	*/
2184 	dump_none,		/* fake dedup BP		*/
2185 	dump_zap,		/* deadlist			*/
2186 	dump_none,		/* deadlist hdr			*/
2187 	dump_zap,		/* dsl clones			*/
2188 	dump_bpobj_subobjs,	/* bpobj subobjs		*/
2189 	dump_unknown,		/* Unknown type, must be last	*/
2190 };
2191 
2192 static void
2193 dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header,
2194     uint64_t *dnode_slots_used)
2195 {
2196 	dmu_buf_t *db = NULL;
2197 	dmu_object_info_t doi;
2198 	dnode_t *dn;
2199 	boolean_t dnode_held = B_FALSE;
2200 	void *bonus = NULL;
2201 	size_t bsize = 0;
2202 	char iblk[32], dblk[32], lsize[32], asize[32], fill[32], dnsize[32];
2203 	char bonus_size[32];
2204 	char aux[50];
2205 	int error;
2206 
2207 	/* make sure nicenum has enough space */
2208 	CTASSERT(sizeof (iblk) >= NN_NUMBUF_SZ);
2209 	CTASSERT(sizeof (dblk) >= NN_NUMBUF_SZ);
2210 	CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
2211 	CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
2212 	CTASSERT(sizeof (bonus_size) >= NN_NUMBUF_SZ);
2213 
2214 	if (*print_header) {
2215 		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %6s  %5s  %6s  %s\n",
2216 		    "Object", "lvl", "iblk", "dblk", "dsize", "dnsize",
2217 		    "lsize", "%full", "type");
2218 		*print_header = 0;
2219 	}
2220 
2221 	if (object == 0) {
2222 		dn = DMU_META_DNODE(os);
2223 		dmu_object_info_from_dnode(dn, &doi);
2224 	} else {
2225 		/*
2226 		 * Encrypted datasets will have sensitive bonus buffers
2227 		 * encrypted. Therefore we cannot hold the bonus buffer and
2228 		 * must hold the dnode itself instead.
2229 		 */
2230 		error = dmu_object_info(os, object, &doi);
2231 		if (error)
2232 			fatal("dmu_object_info() failed, errno %u", error);
2233 
2234 		if (os->os_encrypted &&
2235 		    DMU_OT_IS_ENCRYPTED(doi.doi_bonus_type)) {
2236 			error = dnode_hold(os, object, FTAG, &dn);
2237 			if (error)
2238 				fatal("dnode_hold() failed, errno %u", error);
2239 			dnode_held = B_TRUE;
2240 		} else {
2241 			error = dmu_bonus_hold(os, object, FTAG, &db);
2242 			if (error)
2243 				fatal("dmu_bonus_hold(%llu) failed, errno %u",
2244 				    object, error);
2245 			bonus = db->db_data;
2246 			bsize = db->db_size;
2247 			dn = DB_DNODE((dmu_buf_impl_t *)db);
2248 		}
2249 	}
2250 
2251 	if (dnode_slots_used != NULL)
2252 		*dnode_slots_used = doi.doi_dnodesize / DNODE_MIN_SIZE;
2253 
2254 	zdb_nicenum(doi.doi_metadata_block_size, iblk, sizeof (iblk));
2255 	zdb_nicenum(doi.doi_data_block_size, dblk, sizeof (dblk));
2256 	zdb_nicenum(doi.doi_max_offset, lsize, sizeof (lsize));
2257 	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize, sizeof (asize));
2258 	zdb_nicenum(doi.doi_bonus_size, bonus_size, sizeof (bonus_size));
2259 	zdb_nicenum(doi.doi_dnodesize, dnsize, sizeof (dnsize));
2260 	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
2261 	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
2262 	    doi.doi_max_offset);
2263 
2264 	aux[0] = '\0';
2265 
2266 	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
2267 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
2268 		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
2269 	}
2270 
2271 	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
2272 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
2273 		    ZDB_COMPRESS_NAME(doi.doi_compress));
2274 	}
2275 
2276 	(void) printf("%10" PRIu64
2277 	    "  %3u  %5s  %5s  %5s  %5s  %5s  %6s  %s%s\n",
2278 	    object, doi.doi_indirection, iblk, dblk,
2279 	    asize, dnsize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
2280 
2281 	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
2282 		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %5s  %6s  %s\n",
2283 		    "", "", "", "", "", "", bonus_size, "bonus",
2284 		    ZDB_OT_NAME(doi.doi_bonus_type));
2285 	}
2286 
2287 	if (verbosity >= 4) {
2288 		(void) printf("\tdnode flags: %s%s%s%s\n",
2289 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
2290 		    "USED_BYTES " : "",
2291 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
2292 		    "USERUSED_ACCOUNTED " : "",
2293 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) ?
2294 		    "USEROBJUSED_ACCOUNTED " : "",
2295 		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
2296 		    "SPILL_BLKPTR" : "");
2297 		(void) printf("\tdnode maxblkid: %llu\n",
2298 		    (longlong_t)dn->dn_phys->dn_maxblkid);
2299 
2300 		if (!dnode_held) {
2301 			object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os,
2302 			    object, bonus, bsize);
2303 		} else {
2304 			(void) printf("\t\t(bonus encrypted)\n");
2305 		}
2306 
2307 		if (!os->os_encrypted || !DMU_OT_IS_ENCRYPTED(doi.doi_type)) {
2308 			object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object,
2309 			    NULL, 0);
2310 		} else {
2311 			(void) printf("\t\t(object encrypted)\n");
2312 		}
2313 
2314 		*print_header = 1;
2315 	}
2316 
2317 	if (verbosity >= 5)
2318 		dump_indirect(dn);
2319 
2320 	if (verbosity >= 5) {
2321 		/*
2322 		 * Report the list of segments that comprise the object.
2323 		 */
2324 		uint64_t start = 0;
2325 		uint64_t end;
2326 		uint64_t blkfill = 1;
2327 		int minlvl = 1;
2328 
2329 		if (dn->dn_type == DMU_OT_DNODE) {
2330 			minlvl = 0;
2331 			blkfill = DNODES_PER_BLOCK;
2332 		}
2333 
2334 		for (;;) {
2335 			char segsize[32];
2336 			/* make sure nicenum has enough space */
2337 			CTASSERT(sizeof (segsize) >= NN_NUMBUF_SZ);
2338 			error = dnode_next_offset(dn,
2339 			    0, &start, minlvl, blkfill, 0);
2340 			if (error)
2341 				break;
2342 			end = start;
2343 			error = dnode_next_offset(dn,
2344 			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
2345 			zdb_nicenum(end - start, segsize, sizeof (segsize));
2346 			(void) printf("\t\tsegment [%016llx, %016llx)"
2347 			    " size %5s\n", (u_longlong_t)start,
2348 			    (u_longlong_t)end, segsize);
2349 			if (error)
2350 				break;
2351 			start = end;
2352 		}
2353 	}
2354 
2355 	if (db != NULL)
2356 		dmu_buf_rele(db, FTAG);
2357 	if (dnode_held)
2358 		dnode_rele(dn, FTAG);
2359 }
2360 
2361 static void
2362 count_dir_mos_objects(dsl_dir_t *dd)
2363 {
2364 	mos_obj_refd(dd->dd_object);
2365 	mos_obj_refd(dsl_dir_phys(dd)->dd_child_dir_zapobj);
2366 	mos_obj_refd(dsl_dir_phys(dd)->dd_deleg_zapobj);
2367 	mos_obj_refd(dsl_dir_phys(dd)->dd_props_zapobj);
2368 	mos_obj_refd(dsl_dir_phys(dd)->dd_clones);
2369 }
2370 
2371 static void
2372 count_ds_mos_objects(dsl_dataset_t *ds)
2373 {
2374 	mos_obj_refd(ds->ds_object);
2375 	mos_obj_refd(dsl_dataset_phys(ds)->ds_next_clones_obj);
2376 	mos_obj_refd(dsl_dataset_phys(ds)->ds_props_obj);
2377 	mos_obj_refd(dsl_dataset_phys(ds)->ds_userrefs_obj);
2378 	mos_obj_refd(dsl_dataset_phys(ds)->ds_snapnames_zapobj);
2379 
2380 	if (!dsl_dataset_is_snapshot(ds)) {
2381 		count_dir_mos_objects(ds->ds_dir);
2382 	}
2383 }
2384 
2385 static const char *objset_types[DMU_OST_NUMTYPES] = {
2386 	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
2387 
2388 static void
2389 dump_dir(objset_t *os)
2390 {
2391 	dmu_objset_stats_t dds;
2392 	uint64_t object, object_count;
2393 	uint64_t refdbytes, usedobjs, scratch;
2394 	char numbuf[32];
2395 	char blkbuf[BP_SPRINTF_LEN + 20];
2396 	char osname[ZFS_MAX_DATASET_NAME_LEN];
2397 	const char *type = "UNKNOWN";
2398 	int verbosity = dump_opt['d'];
2399 	int print_header = 1;
2400 	unsigned i;
2401 	int error;
2402 	uint64_t total_slots_used = 0;
2403 	uint64_t max_slot_used = 0;
2404 	uint64_t dnode_slots;
2405 
2406 	/* make sure nicenum has enough space */
2407 	CTASSERT(sizeof (numbuf) >= NN_NUMBUF_SZ);
2408 
2409 	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
2410 	dmu_objset_fast_stat(os, &dds);
2411 	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
2412 
2413 	if (dds.dds_type < DMU_OST_NUMTYPES)
2414 		type = objset_types[dds.dds_type];
2415 
2416 	if (dds.dds_type == DMU_OST_META) {
2417 		dds.dds_creation_txg = TXG_INITIAL;
2418 		usedobjs = BP_GET_FILL(os->os_rootbp);
2419 		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
2420 		    dd_used_bytes;
2421 	} else {
2422 		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
2423 	}
2424 
2425 	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
2426 
2427 	zdb_nicenum(refdbytes, numbuf, sizeof (numbuf));
2428 
2429 	if (verbosity >= 4) {
2430 		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
2431 		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
2432 		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
2433 	} else {
2434 		blkbuf[0] = '\0';
2435 	}
2436 
2437 	dmu_objset_name(os, osname);
2438 
2439 	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
2440 	    "%s, %llu objects%s%s\n",
2441 	    osname, type, (u_longlong_t)dmu_objset_id(os),
2442 	    (u_longlong_t)dds.dds_creation_txg,
2443 	    numbuf, (u_longlong_t)usedobjs, blkbuf,
2444 	    (dds.dds_inconsistent) ? " (inconsistent)" : "");
2445 
2446 	if (zopt_objects != 0) {
2447 		for (i = 0; i < zopt_objects; i++)
2448 			dump_object(os, zopt_object[i], verbosity,
2449 			    &print_header, NULL);
2450 		(void) printf("\n");
2451 		return;
2452 	}
2453 
2454 	if (dump_opt['i'] != 0 || verbosity >= 2)
2455 		dump_intent_log(dmu_objset_zil(os));
2456 
2457 	if (dmu_objset_ds(os) != NULL) {
2458 		dsl_dataset_t *ds = dmu_objset_ds(os);
2459 		dump_deadlist(&ds->ds_deadlist);
2460 
2461 		if (dsl_dataset_remap_deadlist_exists(ds)) {
2462 			(void) printf("ds_remap_deadlist:\n");
2463 			dump_deadlist(&ds->ds_remap_deadlist);
2464 		}
2465 		count_ds_mos_objects(ds);
2466 	}
2467 
2468 	if (verbosity < 2)
2469 		return;
2470 
2471 	if (BP_IS_HOLE(os->os_rootbp))
2472 		return;
2473 
2474 	dump_object(os, 0, verbosity, &print_header, NULL);
2475 	object_count = 0;
2476 	if (DMU_USERUSED_DNODE(os) != NULL &&
2477 	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
2478 		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header,
2479 		    NULL);
2480 		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header,
2481 		    NULL);
2482 	}
2483 
2484 	if (DMU_PROJECTUSED_DNODE(os) != NULL &&
2485 	    DMU_PROJECTUSED_DNODE(os)->dn_type != 0)
2486 		dump_object(os, DMU_PROJECTUSED_OBJECT, verbosity,
2487 		    &print_header, NULL);
2488 
2489 	object = 0;
2490 	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2491 		dump_object(os, object, verbosity, &print_header, &dnode_slots);
2492 		object_count++;
2493 		total_slots_used += dnode_slots;
2494 		max_slot_used = object + dnode_slots - 1;
2495 	}
2496 
2497 	(void) printf("\n");
2498 
2499 	(void) printf("    Dnode slots:\n");
2500 	(void) printf("\tTotal used:    %10llu\n",
2501 	    (u_longlong_t)total_slots_used);
2502 	(void) printf("\tMax used:      %10llu\n",
2503 	    (u_longlong_t)max_slot_used);
2504 	(void) printf("\tPercent empty: %10lf\n",
2505 	    (double)(max_slot_used - total_slots_used)*100 /
2506 	    (double)max_slot_used);
2507 
2508 	(void) printf("\n");
2509 
2510 	if (error != ESRCH) {
2511 		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2512 		abort();
2513 	}
2514 	if (leaked_objects != 0) {
2515 		(void) printf("%d potentially leaked objects detected\n",
2516 		    leaked_objects);
2517 		leaked_objects = 0;
2518 	}
2519 
2520 	ASSERT3U(object_count, ==, usedobjs);
2521 }
2522 
2523 static void
2524 dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2525 {
2526 	time_t timestamp = ub->ub_timestamp;
2527 
2528 	(void) printf("%s", header ? header : "");
2529 	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2530 	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2531 	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2532 	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2533 	(void) printf("\ttimestamp = %llu UTC = %s",
2534 	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2535 
2536 	(void) printf("\tmmp_magic = %016llx\n",
2537 	    (u_longlong_t)ub->ub_mmp_magic);
2538 	if (MMP_VALID(ub)) {
2539 		(void) printf("\tmmp_delay = %0llu\n",
2540 		    (u_longlong_t)ub->ub_mmp_delay);
2541 		if (MMP_SEQ_VALID(ub))
2542 			(void) printf("\tmmp_seq = %u\n",
2543 			    (unsigned int) MMP_SEQ(ub));
2544 		if (MMP_FAIL_INT_VALID(ub))
2545 			(void) printf("\tmmp_fail = %u\n",
2546 			    (unsigned int) MMP_FAIL_INT(ub));
2547 		if (MMP_INTERVAL_VALID(ub))
2548 			(void) printf("\tmmp_write = %u\n",
2549 			    (unsigned int) MMP_INTERVAL(ub));
2550 		/* After MMP_* to make summarize_uberblock_mmp cleaner */
2551 		(void) printf("\tmmp_valid = %x\n",
2552 		    (unsigned int) ub->ub_mmp_config & 0xFF);
2553 	}
2554 
2555 	if (dump_opt['u'] >= 4) {
2556 		char blkbuf[BP_SPRINTF_LEN];
2557 		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2558 		(void) printf("\trootbp = %s\n", blkbuf);
2559 	}
2560 	(void) printf("\tcheckpoint_txg = %llu\n",
2561 	    (u_longlong_t)ub->ub_checkpoint_txg);
2562 	(void) printf("%s", footer ? footer : "");
2563 }
2564 
2565 static void
2566 dump_config(spa_t *spa)
2567 {
2568 	dmu_buf_t *db;
2569 	size_t nvsize = 0;
2570 	int error = 0;
2571 
2572 
2573 	error = dmu_bonus_hold(spa->spa_meta_objset,
2574 	    spa->spa_config_object, FTAG, &db);
2575 
2576 	if (error == 0) {
2577 		nvsize = *(uint64_t *)db->db_data;
2578 		dmu_buf_rele(db, FTAG);
2579 
2580 		(void) printf("\nMOS Configuration:\n");
2581 		dump_packed_nvlist(spa->spa_meta_objset,
2582 		    spa->spa_config_object, (void *)&nvsize, 1);
2583 	} else {
2584 		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2585 		    (u_longlong_t)spa->spa_config_object, error);
2586 	}
2587 }
2588 
2589 static void
2590 dump_cachefile(const char *cachefile)
2591 {
2592 	int fd;
2593 	struct stat64 statbuf;
2594 	char *buf;
2595 	nvlist_t *config;
2596 
2597 	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2598 		(void) printf("cannot open '%s': %s\n", cachefile,
2599 		    strerror(errno));
2600 		exit(1);
2601 	}
2602 
2603 	if (fstat64(fd, &statbuf) != 0) {
2604 		(void) printf("failed to stat '%s': %s\n", cachefile,
2605 		    strerror(errno));
2606 		exit(1);
2607 	}
2608 
2609 	if ((buf = malloc(statbuf.st_size)) == NULL) {
2610 		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
2611 		    (u_longlong_t)statbuf.st_size);
2612 		exit(1);
2613 	}
2614 
2615 	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2616 		(void) fprintf(stderr, "failed to read %llu bytes\n",
2617 		    (u_longlong_t)statbuf.st_size);
2618 		exit(1);
2619 	}
2620 
2621 	(void) close(fd);
2622 
2623 	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2624 		(void) fprintf(stderr, "failed to unpack nvlist\n");
2625 		exit(1);
2626 	}
2627 
2628 	free(buf);
2629 
2630 	dump_nvlist(config, 0);
2631 
2632 	nvlist_free(config);
2633 }
2634 
2635 static void
2636 print_l2arc_header(void)
2637 {
2638 	(void) printf("------------------------------------\n");
2639 	(void) printf("L2ARC device header\n");
2640 	(void) printf("------------------------------------\n");
2641 }
2642 
2643 static void
2644 print_l2arc_log_blocks(void)
2645 {
2646 	(void) printf("------------------------------------\n");
2647 	(void) printf("L2ARC device log blocks\n");
2648 	(void) printf("------------------------------------\n");
2649 }
2650 
2651 static void
2652 dump_l2arc_log_entries(uint64_t log_entries,
2653     l2arc_log_ent_phys_t *le, uint64_t i)
2654 {
2655 	for (uint64_t j = 0; j < log_entries; j++) {
2656 		dva_t dva = le[j].le_dva;
2657 		(void) printf("lb[%4llu]\tle[%4d]\tDVA asize: %llu, "
2658 		    "vdev: %llu, offset: %llu\n",
2659 		    (u_longlong_t)i, j + 1,
2660 		    (u_longlong_t)DVA_GET_ASIZE(&dva),
2661 		    (u_longlong_t)DVA_GET_VDEV(&dva),
2662 		    (u_longlong_t)DVA_GET_OFFSET(&dva));
2663 		(void) printf("|\t\t\t\tbirth: %llu\n",
2664 		    (u_longlong_t)le[j].le_birth);
2665 		(void) printf("|\t\t\t\tlsize: %llu\n",
2666 		    (u_longlong_t)L2BLK_GET_LSIZE((&le[j])->le_prop));
2667 		(void) printf("|\t\t\t\tpsize: %llu\n",
2668 		    (u_longlong_t)L2BLK_GET_PSIZE((&le[j])->le_prop));
2669 		(void) printf("|\t\t\t\tcompr: %llu\n",
2670 		    (u_longlong_t)L2BLK_GET_COMPRESS((&le[j])->le_prop));
2671 		(void) printf("|\t\t\t\ttype: %llu\n",
2672 		    (u_longlong_t)L2BLK_GET_TYPE((&le[j])->le_prop));
2673 		(void) printf("|\t\t\t\tprotected: %llu\n",
2674 		    (u_longlong_t)L2BLK_GET_PROTECTED((&le[j])->le_prop));
2675 		(void) printf("|\t\t\t\tprefetch: %llu\n",
2676 		    (u_longlong_t)L2BLK_GET_PREFETCH((&le[j])->le_prop));
2677 		(void) printf("|\t\t\t\taddress: %llu\n",
2678 		    (u_longlong_t)le[j].le_daddr);
2679 		(void) printf("|\n");
2680 	}
2681 	(void) printf("\n");
2682 }
2683 
2684 static void
2685 dump_l2arc_log_blkptr(l2arc_log_blkptr_t lbps)
2686 {
2687 	(void) printf("|\t\tdaddr: %llu\n", (u_longlong_t)lbps.lbp_daddr);
2688 	(void) printf("|\t\tpayload_asize: %llu\n",
2689 	    (u_longlong_t)lbps.lbp_payload_asize);
2690 	(void) printf("|\t\tpayload_start: %llu\n",
2691 	    (u_longlong_t)lbps.lbp_payload_start);
2692 	(void) printf("|\t\tlsize: %llu\n",
2693 	    (u_longlong_t)L2BLK_GET_LSIZE((&lbps)->lbp_prop));
2694 	(void) printf("|\t\tasize: %llu\n",
2695 	    (u_longlong_t)L2BLK_GET_PSIZE((&lbps)->lbp_prop));
2696 	(void) printf("|\t\tcompralgo: %llu\n",
2697 	    (u_longlong_t)L2BLK_GET_COMPRESS((&lbps)->lbp_prop));
2698 	(void) printf("|\t\tcksumalgo: %llu\n",
2699 	    (u_longlong_t)L2BLK_GET_CHECKSUM((&lbps)->lbp_prop));
2700 	(void) printf("|\n\n");
2701 }
2702 
2703 static void
2704 dump_l2arc_log_blocks(int fd, l2arc_dev_hdr_phys_t l2dhdr,
2705     l2arc_dev_hdr_phys_t *rebuild)
2706 {
2707 	l2arc_log_blk_phys_t this_lb;
2708 	uint64_t asize;
2709 	l2arc_log_blkptr_t lbps[2];
2710 	abd_t *abd;
2711 	zio_cksum_t cksum;
2712 	int failed = 0;
2713 	l2arc_dev_t dev;
2714 
2715 	if (!dump_opt['q'])
2716 		print_l2arc_log_blocks();
2717 	bcopy((&l2dhdr)->dh_start_lbps, lbps, sizeof (lbps));
2718 
2719 	dev.l2ad_evict = l2dhdr.dh_evict;
2720 	dev.l2ad_start = l2dhdr.dh_start;
2721 	dev.l2ad_end = l2dhdr.dh_end;
2722 
2723 	if (l2dhdr.dh_start_lbps[0].lbp_daddr == 0) {
2724 		/* no log blocks to read */
2725 		if (!dump_opt['q']) {
2726 			(void) printf("No log blocks to read\n");
2727 			(void) printf("\n");
2728 		}
2729 		return;
2730 	} else {
2731 		dev.l2ad_hand = lbps[0].lbp_daddr +
2732 		    L2BLK_GET_PSIZE((&lbps[0])->lbp_prop);
2733 	}
2734 
2735 	dev.l2ad_first = !!(l2dhdr.dh_flags & L2ARC_DEV_HDR_EVICT_FIRST);
2736 
2737 	for (;;) {
2738 		if (!l2arc_log_blkptr_valid(&dev, &lbps[0]))
2739 			break;
2740 
2741 		/* L2BLK_GET_PSIZE returns aligned size for log blocks */
2742 		asize = L2BLK_GET_PSIZE((&lbps[0])->lbp_prop);
2743 		if (pread64(fd, &this_lb, asize, lbps[0].lbp_daddr) !=
2744 		    (ssize_t)asize) {
2745 			if (!dump_opt['q']) {
2746 				(void) printf("Error while reading next log "
2747 				    "block\n\n");
2748 			}
2749 			break;
2750 		}
2751 
2752 		fletcher_4_native(&this_lb, asize, NULL, &cksum);
2753 		if (!ZIO_CHECKSUM_EQUAL(cksum, lbps[0].lbp_cksum)) {
2754 			failed++;
2755 			if (!dump_opt['q']) {
2756 				(void) printf("Invalid cksum\n");
2757 				dump_l2arc_log_blkptr(lbps[0]);
2758 			}
2759 			break;
2760 		}
2761 
2762 		switch (L2BLK_GET_COMPRESS((&lbps[0])->lbp_prop)) {
2763 		case ZIO_COMPRESS_OFF:
2764 			break;
2765 		case ZIO_COMPRESS_LZ4:
2766 			abd = abd_alloc_for_io(asize, B_TRUE);
2767 			abd_copy_from_buf_off(abd, &this_lb, 0, asize);
2768 			zio_decompress_data(L2BLK_GET_COMPRESS(
2769 			    (&lbps[0])->lbp_prop), abd, &this_lb,
2770 			    asize, sizeof (this_lb));
2771 			abd_free(abd);
2772 			break;
2773 		default:
2774 			break;
2775 		}
2776 
2777 		if (this_lb.lb_magic == BSWAP_64(L2ARC_LOG_BLK_MAGIC))
2778 			byteswap_uint64_array(&this_lb, sizeof (this_lb));
2779 		if (this_lb.lb_magic != L2ARC_LOG_BLK_MAGIC) {
2780 			if (!dump_opt['q'])
2781 				(void) printf("Invalid log block magic\n\n");
2782 			break;
2783 		}
2784 
2785 		rebuild->dh_lb_count++;
2786 		rebuild->dh_lb_asize += asize;
2787 		if (dump_opt['l'] > 1 && !dump_opt['q']) {
2788 			(void) printf("lb[%4llu]\tmagic: %llu\n",
2789 			    (u_longlong_t)rebuild->dh_lb_count,
2790 			    (u_longlong_t)this_lb.lb_magic);
2791 			dump_l2arc_log_blkptr(lbps[0]);
2792 		}
2793 
2794 		if (dump_opt['l'] > 2 && !dump_opt['q'])
2795 			dump_l2arc_log_entries(l2dhdr.dh_log_entries,
2796 			    this_lb.lb_entries,
2797 			    rebuild->dh_lb_count);
2798 
2799 		if (l2arc_range_check_overlap(lbps[1].lbp_payload_start,
2800 		    lbps[0].lbp_payload_start, dev.l2ad_evict) &&
2801 		    !dev.l2ad_first)
2802 			break;
2803 
2804 		lbps[0] = lbps[1];
2805 		lbps[1] = this_lb.lb_prev_lbp;
2806 	}
2807 
2808 	if (!dump_opt['q']) {
2809 		(void) printf("log_blk_count:\t %llu with valid cksum\n",
2810 		    (u_longlong_t)rebuild->dh_lb_count);
2811 		(void) printf("\t\t %d with invalid cksum\n", failed);
2812 		(void) printf("log_blk_asize:\t %llu\n\n",
2813 		    (u_longlong_t)rebuild->dh_lb_asize);
2814 	}
2815 }
2816 
2817 static int
2818 dump_l2arc_header(int fd)
2819 {
2820 	l2arc_dev_hdr_phys_t l2dhdr, rebuild;
2821 	int error = B_FALSE;
2822 
2823 	bzero(&l2dhdr, sizeof (l2dhdr));
2824 	bzero(&rebuild, sizeof (rebuild));
2825 
2826 	if (pread64(fd, &l2dhdr, sizeof (l2dhdr),
2827 	    VDEV_LABEL_START_SIZE) != sizeof (l2dhdr)) {
2828 		error = B_TRUE;
2829 	} else {
2830 		if (l2dhdr.dh_magic == BSWAP_64(L2ARC_DEV_HDR_MAGIC))
2831 			byteswap_uint64_array(&l2dhdr, sizeof (l2dhdr));
2832 
2833 		if (l2dhdr.dh_magic != L2ARC_DEV_HDR_MAGIC)
2834 			error = B_TRUE;
2835 	}
2836 
2837 	if (error) {
2838 		(void) printf("L2ARC device header not found\n\n");
2839 		/* Do not return an error here for backward compatibility */
2840 		return (0);
2841 	} else if (!dump_opt['q']) {
2842 		print_l2arc_header();
2843 
2844 		(void) printf("    magic: %llu\n",
2845 		    (u_longlong_t)l2dhdr.dh_magic);
2846 		(void) printf("    version: %llu\n",
2847 		    (u_longlong_t)l2dhdr.dh_version);
2848 		(void) printf("    pool_guid: %llu\n",
2849 		    (u_longlong_t)l2dhdr.dh_spa_guid);
2850 		(void) printf("    flags: %llu\n",
2851 		    (u_longlong_t)l2dhdr.dh_flags);
2852 		(void) printf("    start_lbps[0]: %llu\n",
2853 		    (u_longlong_t)
2854 		    l2dhdr.dh_start_lbps[0].lbp_daddr);
2855 		(void) printf("    start_lbps[1]: %llu\n",
2856 		    (u_longlong_t)
2857 		    l2dhdr.dh_start_lbps[1].lbp_daddr);
2858 		(void) printf("    log_blk_ent: %llu\n",
2859 		    (u_longlong_t)l2dhdr.dh_log_entries);
2860 		(void) printf("    start: %llu\n",
2861 		    (u_longlong_t)l2dhdr.dh_start);
2862 		(void) printf("    end: %llu\n",
2863 		    (u_longlong_t)l2dhdr.dh_end);
2864 		(void) printf("    evict: %llu\n",
2865 		    (u_longlong_t)l2dhdr.dh_evict);
2866 		(void) printf("    lb_asize_refcount: %llu\n",
2867 		    (u_longlong_t)l2dhdr.dh_lb_asize);
2868 		(void) printf("    lb_count_refcount: %llu\n\n",
2869 		    (u_longlong_t)l2dhdr.dh_lb_count);
2870 	}
2871 
2872 	dump_l2arc_log_blocks(fd, l2dhdr, &rebuild);
2873 	/*
2874 	 * The total aligned size of log blocks and the number of log blocks
2875 	 * reported in the header of the device may be less than what zdb
2876 	 * reports by dump_l2arc_log_blocks() which emulates l2arc_rebuild().
2877 	 * This happens because dump_l2arc_log_blocks() lacks the memory
2878 	 * pressure valve that l2arc_rebuild() has. Thus, if we are on a system
2879 	 * with low memory, l2arc_rebuild will exit prematurely and dh_lb_asize
2880 	 * and dh_lb_count will be lower to begin with than what exists on the
2881 	 * device. This is normal and zdb should not exit with an error. The
2882 	 * opposite case should never happen though, the values reported in the
2883 	 * header should never be higher than what dump_l2arc_log_blocks() and
2884 	 * l2arc_rebuild() report. If this happens there is a leak in the
2885 	 * accounting of log blocks.
2886 	 */
2887 	if (l2dhdr.dh_lb_asize > rebuild.dh_lb_asize ||
2888 	    l2dhdr.dh_lb_count > rebuild.dh_lb_count)
2889 		return (1);
2890 
2891 	return (0);
2892 }
2893 
2894 static char curpath[PATH_MAX];
2895 
2896 /*
2897  * Iterate through the path components, recursively passing
2898  * current one's obj and remaining path until we find the obj
2899  * for the last one.
2900  */
2901 static int
2902 dump_path_impl(objset_t *os, uint64_t obj, char *name)
2903 {
2904 	int err;
2905 	int header = 1;
2906 	uint64_t child_obj;
2907 	char *s;
2908 	dmu_buf_t *db;
2909 	dmu_object_info_t doi;
2910 
2911 	if ((s = strchr(name, '/')) != NULL)
2912 		*s = '\0';
2913 	err = zap_lookup(os, obj, name, 8, 1, &child_obj);
2914 
2915 	(void) strlcat(curpath, name, sizeof (curpath));
2916 
2917 	if (err != 0) {
2918 		(void) fprintf(stderr, "failed to lookup %s: %s\n",
2919 		    curpath, strerror(err));
2920 		return (err);
2921 	}
2922 
2923 	child_obj = ZFS_DIRENT_OBJ(child_obj);
2924 	err = sa_buf_hold(os, child_obj, FTAG, &db);
2925 	if (err != 0) {
2926 		(void) fprintf(stderr,
2927 		    "failed to get SA dbuf for obj %llu: %s\n",
2928 		    (u_longlong_t)child_obj, strerror(err));
2929 		return (EINVAL);
2930 	}
2931 	dmu_object_info_from_db(db, &doi);
2932 	sa_buf_rele(db, FTAG);
2933 
2934 	if (doi.doi_bonus_type != DMU_OT_SA &&
2935 	    doi.doi_bonus_type != DMU_OT_ZNODE) {
2936 		(void) fprintf(stderr, "invalid bonus type %d for obj %llu\n",
2937 		    doi.doi_bonus_type, (u_longlong_t)child_obj);
2938 		return (EINVAL);
2939 	}
2940 
2941 	if (dump_opt['v'] > 6) {
2942 		(void) printf("obj=%llu %s type=%d bonustype=%d\n",
2943 		    (u_longlong_t)child_obj, curpath, doi.doi_type,
2944 		    doi.doi_bonus_type);
2945 	}
2946 
2947 	(void) strlcat(curpath, "/", sizeof (curpath));
2948 
2949 	switch (doi.doi_type) {
2950 	case DMU_OT_DIRECTORY_CONTENTS:
2951 		if (s != NULL && *(s + 1) != '\0')
2952 			return (dump_path_impl(os, child_obj, s + 1));
2953 		/*FALLTHROUGH*/
2954 	case DMU_OT_PLAIN_FILE_CONTENTS:
2955 		dump_object(os, child_obj, dump_opt['v'], &header, NULL);
2956 		return (0);
2957 	default:
2958 		(void) fprintf(stderr, "object %llu has non-file/directory "
2959 		    "type %d\n", (u_longlong_t)obj, doi.doi_type);
2960 		break;
2961 	}
2962 
2963 	return (EINVAL);
2964 }
2965 
2966 /*
2967  * Dump the blocks for the object specified by path inside the dataset.
2968  */
2969 static int
2970 dump_path(char *ds, char *path)
2971 {
2972 	int err;
2973 	objset_t *os;
2974 	uint64_t root_obj;
2975 
2976 	err = open_objset(ds, DMU_OST_ZFS, FTAG, &os);
2977 	if (err != 0)
2978 		return (err);
2979 
2980 	err = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &root_obj);
2981 	if (err != 0) {
2982 		(void) fprintf(stderr, "can't lookup root znode: %s\n",
2983 		    strerror(err));
2984 		dmu_objset_disown(os, B_FALSE, FTAG);
2985 		return (EINVAL);
2986 	}
2987 
2988 	(void) snprintf(curpath, sizeof (curpath), "dataset=%s path=/", ds);
2989 
2990 	err = dump_path_impl(os, root_obj, path);
2991 
2992 	close_objset(os, FTAG);
2993 	return (err);
2994 }
2995 
2996 typedef struct cksum_record {
2997 	zio_cksum_t cksum;
2998 	boolean_t labels[VDEV_LABELS];
2999 	avl_node_t link;
3000 } cksum_record_t;
3001 
3002 static int
3003 cksum_record_compare(const void *x1, const void *x2)
3004 {
3005 	const cksum_record_t *l = (cksum_record_t *)x1;
3006 	const cksum_record_t *r = (cksum_record_t *)x2;
3007 	int arraysize = ARRAY_SIZE(l->cksum.zc_word);
3008 	int difference;
3009 
3010 	for (int i = 0; i < arraysize; i++) {
3011 		difference = AVL_CMP(l->cksum.zc_word[i], r->cksum.zc_word[i]);
3012 		if (difference)
3013 			break;
3014 	}
3015 
3016 	return (difference);
3017 }
3018 
3019 static cksum_record_t *
3020 cksum_record_alloc(zio_cksum_t *cksum, int l)
3021 {
3022 	cksum_record_t *rec;
3023 
3024 	rec = umem_zalloc(sizeof (*rec), UMEM_NOFAIL);
3025 	rec->cksum = *cksum;
3026 	rec->labels[l] = B_TRUE;
3027 
3028 	return (rec);
3029 }
3030 
3031 static cksum_record_t *
3032 cksum_record_lookup(avl_tree_t *tree, zio_cksum_t *cksum)
3033 {
3034 	cksum_record_t lookup = { .cksum = *cksum };
3035 	avl_index_t where;
3036 
3037 	return (avl_find(tree, &lookup, &where));
3038 }
3039 
3040 static cksum_record_t *
3041 cksum_record_insert(avl_tree_t *tree, zio_cksum_t *cksum, int l)
3042 {
3043 	cksum_record_t *rec;
3044 
3045 	rec = cksum_record_lookup(tree, cksum);
3046 	if (rec) {
3047 		rec->labels[l] = B_TRUE;
3048 	} else {
3049 		rec = cksum_record_alloc(cksum, l);
3050 		avl_add(tree, rec);
3051 	}
3052 
3053 	return (rec);
3054 }
3055 
3056 static int
3057 first_label(cksum_record_t *rec)
3058 {
3059 	for (int i = 0; i < VDEV_LABELS; i++)
3060 		if (rec->labels[i])
3061 			return (i);
3062 
3063 	return (-1);
3064 }
3065 
3066 static void
3067 print_label_numbers(char *prefix, cksum_record_t *rec)
3068 {
3069 	printf("%s", prefix);
3070 	for (int i = 0; i < VDEV_LABELS; i++)
3071 		if (rec->labels[i] == B_TRUE)
3072 			printf("%d ", i);
3073 	printf("\n");
3074 }
3075 
3076 #define	MAX_UBERBLOCK_COUNT (VDEV_UBERBLOCK_RING >> UBERBLOCK_SHIFT)
3077 
3078 typedef struct zdb_label {
3079 	vdev_label_t label;
3080 	nvlist_t *config_nv;
3081 	cksum_record_t *config;
3082 	cksum_record_t *uberblocks[MAX_UBERBLOCK_COUNT];
3083 	boolean_t header_printed;
3084 	boolean_t read_failed;
3085 } zdb_label_t;
3086 
3087 static void
3088 print_label_header(zdb_label_t *label, int l)
3089 {
3090 
3091 	if (dump_opt['q'])
3092 		return;
3093 
3094 	if (label->header_printed == B_TRUE)
3095 		return;
3096 
3097 	(void) printf("------------------------------------\n");
3098 	(void) printf("LABEL %d\n", l);
3099 	(void) printf("------------------------------------\n");
3100 
3101 	label->header_printed = B_TRUE;
3102 }
3103 
3104 static void
3105 dump_config_from_label(zdb_label_t *label, size_t buflen, int l)
3106 {
3107 	if (dump_opt['q'])
3108 		return;
3109 
3110 	if ((dump_opt['l'] < 3) && (first_label(label->config) != l))
3111 		return;
3112 
3113 	print_label_header(label, l);
3114 	dump_nvlist(label->config_nv, 4);
3115 	print_label_numbers("    labels = ", label->config);
3116 }
3117 
3118 #define	ZDB_MAX_UB_HEADER_SIZE 32
3119 
3120 static void
3121 dump_label_uberblocks(zdb_label_t *label, uint64_t ashift, int label_num)
3122 {
3123 	vdev_t vd;
3124 	char header[ZDB_MAX_UB_HEADER_SIZE];
3125 
3126 	vd.vdev_ashift = ashift;
3127 	vd.vdev_top = &vd;
3128 
3129 	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(&vd); i++) {
3130 		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(&vd, i);
3131 		uberblock_t *ub = (void *)((char *)&label->label + uoff);
3132 		cksum_record_t *rec = label->uberblocks[i];
3133 
3134 		if (rec == NULL) {
3135 			if (dump_opt['u'] >= 2) {
3136 				print_label_header(label, label_num);
3137 				(void) printf("    Uberblock[%d] invalid\n", i);
3138 			}
3139 			continue;
3140 		}
3141 
3142 		if ((dump_opt['u'] < 3) && (first_label(rec) != label_num))
3143 			continue;
3144 
3145 		print_label_header(label, label_num);
3146 		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
3147 		    "    Uberblock[%d]\n", i);
3148 		dump_uberblock(ub, header, "");
3149 		print_label_numbers("        labels = ", rec);
3150 	}
3151 }
3152 
3153 static int
3154 dump_label(const char *dev)
3155 {
3156 	char path[MAXPATHLEN];
3157 	zdb_label_t labels[VDEV_LABELS];
3158 	uint64_t psize, ashift, l2cache;
3159 	struct stat64 statbuf;
3160 	boolean_t config_found = B_FALSE;
3161 	boolean_t error = B_FALSE;
3162 	boolean_t read_l2arc_header = B_FALSE;
3163 	avl_tree_t config_tree;
3164 	avl_tree_t uberblock_tree;
3165 	void *node, *cookie;
3166 	int fd;
3167 
3168 	bzero(labels, sizeof (labels));
3169 
3170 	(void) strlcpy(path, dev, sizeof (path));
3171 	if (dev[0] == '/') {
3172 		if (strncmp(dev, ZFS_DISK_ROOTD,
3173 		    strlen(ZFS_DISK_ROOTD)) == 0) {
3174 			(void) snprintf(path, sizeof (path), "%s%s",
3175 			    ZFS_RDISK_ROOTD, dev + strlen(ZFS_DISK_ROOTD));
3176 		}
3177 	} else if (stat64(path, &statbuf) != 0) {
3178 		char *s;
3179 
3180 		(void) snprintf(path, sizeof (path), "%s%s", ZFS_RDISK_ROOTD,
3181 		    dev);
3182 		if (((s = strrchr(dev, 's')) == NULL &&
3183 		    (s = strchr(dev, 'p')) == NULL) ||
3184 		    !isdigit(*(s + 1)))
3185 			(void) strlcat(path, "s0", sizeof (path));
3186 	}
3187 
3188 	if ((fd = open64(path, O_RDONLY)) < 0) {
3189 		(void) fprintf(stderr, "cannot open '%s': %s\n", path,
3190 		    strerror(errno));
3191 		exit(1);
3192 	}
3193 
3194 	if (fstat64(fd, &statbuf) != 0) {
3195 		(void) fprintf(stderr, "failed to stat '%s': %s\n", path,
3196 		    strerror(errno));
3197 		(void) close(fd);
3198 		exit(1);
3199 	}
3200 
3201 	if (S_ISBLK(statbuf.st_mode)) {
3202 		(void) fprintf(stderr,
3203 		    "cannot use '%s': character device required\n", path);
3204 		(void) close(fd);
3205 		exit(1);
3206 	}
3207 
3208 	avl_create(&config_tree, cksum_record_compare,
3209 	    sizeof (cksum_record_t), offsetof(cksum_record_t, link));
3210 	avl_create(&uberblock_tree, cksum_record_compare,
3211 	    sizeof (cksum_record_t), offsetof(cksum_record_t, link));
3212 
3213 	psize = statbuf.st_size;
3214 	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
3215 	ashift = SPA_MINBLOCKSHIFT;
3216 
3217 	/*
3218 	 * 1. Read the label from disk
3219 	 * 2. Unpack the configuration and insert in config tree.
3220 	 * 3. Traverse all uberblocks and insert in uberblock tree.
3221 	 */
3222 	for (int l = 0; l < VDEV_LABELS; l++) {
3223 		zdb_label_t *label = &labels[l];
3224 		char *buf = label->label.vl_vdev_phys.vp_nvlist;
3225 		size_t buflen = sizeof (label->label.vl_vdev_phys.vp_nvlist);
3226 		nvlist_t *config;
3227 		cksum_record_t *rec;
3228 		zio_cksum_t cksum;
3229 		vdev_t vd;
3230 
3231 		if (pread64(fd, &label->label, sizeof (label->label),
3232 		    vdev_label_offset(psize, l, 0)) != sizeof (label->label)) {
3233 			if (!dump_opt['q'])
3234 				(void) printf("failed to read label %d\n", l);
3235 			label->read_failed = B_TRUE;
3236 			error = B_TRUE;
3237 			continue;
3238 		}
3239 
3240 		label->read_failed = B_FALSE;
3241 
3242 		if (nvlist_unpack(buf, buflen, &config, 0) == 0) {
3243 			nvlist_t *vdev_tree = NULL;
3244 			size_t size;
3245 
3246 			if ((nvlist_lookup_nvlist(config,
3247 			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
3248 			    (nvlist_lookup_uint64(vdev_tree,
3249 			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
3250 				ashift = SPA_MINBLOCKSHIFT;
3251 
3252 			/* If the device is a cache device clear the header. */
3253 			if (!read_l2arc_header) {
3254 				if (nvlist_lookup_uint64(config,
3255 				    ZPOOL_CONFIG_POOL_STATE, &l2cache) == 0 &&
3256 				    l2cache == POOL_STATE_L2CACHE) {
3257 					read_l2arc_header = B_TRUE;
3258 				}
3259 			}
3260 
3261 			if (nvlist_size(config, &size, NV_ENCODE_XDR) != 0)
3262 				size = buflen;
3263 
3264 			fletcher_4_native(buf, size, NULL, &cksum);
3265 			rec = cksum_record_insert(&config_tree, &cksum, l);
3266 
3267 			label->config = rec;
3268 			label->config_nv = config;
3269 			config_found = B_TRUE;
3270 		} else {
3271 			error = B_TRUE;
3272 		}
3273 
3274 		vd.vdev_ashift = ashift;
3275 		vd.vdev_top = &vd;
3276 
3277 		for (int i = 0; i < VDEV_UBERBLOCK_COUNT(&vd); i++) {
3278 			uint64_t uoff = VDEV_UBERBLOCK_OFFSET(&vd, i);
3279 			uberblock_t *ub = (void *)((char *)label + uoff);
3280 
3281 			if (uberblock_verify(ub))
3282 				continue;
3283 
3284 			fletcher_4_native(ub, sizeof (*ub), NULL, &cksum);
3285 			rec = cksum_record_insert(&uberblock_tree, &cksum, l);
3286 
3287 			label->uberblocks[i] = rec;
3288 		}
3289 	}
3290 
3291 	/*
3292 	 * Dump the label and uberblocks.
3293 	 */
3294 	for (int l = 0; l < VDEV_LABELS; l++) {
3295 		zdb_label_t *label = &labels[l];
3296 		size_t buflen = sizeof (label->label.vl_vdev_phys.vp_nvlist);
3297 
3298 		if (label->read_failed == B_TRUE)
3299 			continue;
3300 
3301 		if (label->config_nv) {
3302 			dump_config_from_label(label, buflen, l);
3303 		} else {
3304 			if (!dump_opt['q'])
3305 				(void) printf("failed to unpack label %d\n", l);
3306 		}
3307 
3308 		if (dump_opt['u'])
3309 			dump_label_uberblocks(label, ashift, l);
3310 
3311 		nvlist_free(label->config_nv);
3312 	}
3313 
3314 	/*
3315 	 * Dump the L2ARC header, if existent.
3316 	 */
3317 	if (read_l2arc_header)
3318 		error |= dump_l2arc_header(fd);
3319 
3320 	cookie = NULL;
3321 	while ((node = avl_destroy_nodes(&config_tree, &cookie)) != NULL)
3322 		umem_free(node, sizeof (cksum_record_t));
3323 
3324 	cookie = NULL;
3325 	while ((node = avl_destroy_nodes(&uberblock_tree, &cookie)) != NULL)
3326 		umem_free(node, sizeof (cksum_record_t));
3327 
3328 	avl_destroy(&config_tree);
3329 	avl_destroy(&uberblock_tree);
3330 
3331 	(void) close(fd);
3332 
3333 	return (config_found == B_FALSE ? 2 :
3334 	    (error == B_TRUE ? 1 : 0));
3335 }
3336 
3337 static uint64_t dataset_feature_count[SPA_FEATURES];
3338 static uint64_t remap_deadlist_count = 0;
3339 
3340 static int
3341 dump_one_dir(const char *dsname, void *arg __unused)
3342 {
3343 	int error;
3344 	objset_t *os;
3345 
3346 	error = open_objset(dsname, DMU_OST_ANY, FTAG, &os);
3347 	if (error != 0)
3348 		return (0);
3349 
3350 	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
3351 		if (!dmu_objset_ds(os)->ds_feature_inuse[f])
3352 			continue;
3353 		ASSERT(spa_feature_table[f].fi_flags &
3354 		    ZFEATURE_FLAG_PER_DATASET);
3355 		dataset_feature_count[f]++;
3356 	}
3357 
3358 	if (dsl_dataset_remap_deadlist_exists(dmu_objset_ds(os))) {
3359 		remap_deadlist_count++;
3360 	}
3361 
3362 	dump_dir(os);
3363 	close_objset(os, FTAG);
3364 	fuid_table_destroy();
3365 	return (0);
3366 }
3367 
3368 /*
3369  * Block statistics.
3370  */
3371 #define	PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
3372 typedef struct zdb_blkstats {
3373 	uint64_t zb_asize;
3374 	uint64_t zb_lsize;
3375 	uint64_t zb_psize;
3376 	uint64_t zb_count;
3377 	uint64_t zb_gangs;
3378 	uint64_t zb_ditto_samevdev;
3379 	uint64_t zb_ditto_same_ms;
3380 	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
3381 } zdb_blkstats_t;
3382 
3383 /*
3384  * Extended object types to report deferred frees and dedup auto-ditto blocks.
3385  */
3386 #define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
3387 #define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
3388 #define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
3389 #define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
3390 
3391 static const char *zdb_ot_extname[] = {
3392 	"deferred free",
3393 	"dedup ditto",
3394 	"other",
3395 	"Total",
3396 };
3397 
3398 #define	ZB_TOTAL	DN_MAX_LEVELS
3399 
3400 typedef struct zdb_cb {
3401 	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
3402 	uint64_t	zcb_removing_size;
3403 	uint64_t	zcb_checkpoint_size;
3404 	uint64_t	zcb_dedup_asize;
3405 	uint64_t	zcb_dedup_blocks;
3406 	uint64_t	zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
3407 	uint64_t	zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
3408 	    [BPE_PAYLOAD_SIZE];
3409 	uint64_t	zcb_start;
3410 	hrtime_t	zcb_lastprint;
3411 	uint64_t	zcb_totalasize;
3412 	uint64_t	zcb_errors[256];
3413 	int		zcb_readfails;
3414 	int		zcb_haderrors;
3415 	spa_t		*zcb_spa;
3416 	uint32_t	**zcb_vd_obsolete_counts;
3417 } zdb_cb_t;
3418 
3419 /* test if two DVA offsets from same vdev are within the same metaslab */
3420 static boolean_t
3421 same_metaslab(spa_t *spa, uint64_t vdev, uint64_t off1, uint64_t off2)
3422 {
3423 	vdev_t *vd = vdev_lookup_top(spa, vdev);
3424 	uint64_t ms_shift = vd->vdev_ms_shift;
3425 
3426 	return ((off1 >> ms_shift) == (off2 >> ms_shift));
3427 }
3428 
3429 static void
3430 zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
3431     dmu_object_type_t type)
3432 {
3433 	uint64_t refcnt = 0;
3434 
3435 	ASSERT(type < ZDB_OT_TOTAL);
3436 
3437 	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
3438 		return;
3439 
3440 	spa_config_enter(zcb->zcb_spa, SCL_CONFIG, FTAG, RW_READER);
3441 
3442 	for (int i = 0; i < 4; i++) {
3443 		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
3444 		int t = (i & 1) ? type : ZDB_OT_TOTAL;
3445 		int equal;
3446 		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
3447 
3448 		zb->zb_asize += BP_GET_ASIZE(bp);
3449 		zb->zb_lsize += BP_GET_LSIZE(bp);
3450 		zb->zb_psize += BP_GET_PSIZE(bp);
3451 		zb->zb_count++;
3452 
3453 		/*
3454 		 * The histogram is only big enough to record blocks up to
3455 		 * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
3456 		 * "other", bucket.
3457 		 */
3458 		unsigned idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
3459 		idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
3460 		zb->zb_psize_histogram[idx]++;
3461 
3462 		zb->zb_gangs += BP_COUNT_GANG(bp);
3463 
3464 		switch (BP_GET_NDVAS(bp)) {
3465 		case 2:
3466 			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
3467 			    DVA_GET_VDEV(&bp->blk_dva[1])) {
3468 				zb->zb_ditto_samevdev++;
3469 
3470 				if (same_metaslab(zcb->zcb_spa,
3471 				    DVA_GET_VDEV(&bp->blk_dva[0]),
3472 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
3473 				    DVA_GET_OFFSET(&bp->blk_dva[1])))
3474 					zb->zb_ditto_same_ms++;
3475 			}
3476 			break;
3477 		case 3:
3478 			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
3479 			    DVA_GET_VDEV(&bp->blk_dva[1])) +
3480 			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
3481 			    DVA_GET_VDEV(&bp->blk_dva[2])) +
3482 			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
3483 			    DVA_GET_VDEV(&bp->blk_dva[2]));
3484 			if (equal != 0) {
3485 				zb->zb_ditto_samevdev++;
3486 
3487 				if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
3488 				    DVA_GET_VDEV(&bp->blk_dva[1]) &&
3489 				    same_metaslab(zcb->zcb_spa,
3490 				    DVA_GET_VDEV(&bp->blk_dva[0]),
3491 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
3492 				    DVA_GET_OFFSET(&bp->blk_dva[1])))
3493 					zb->zb_ditto_same_ms++;
3494 				else if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
3495 				    DVA_GET_VDEV(&bp->blk_dva[2]) &&
3496 				    same_metaslab(zcb->zcb_spa,
3497 				    DVA_GET_VDEV(&bp->blk_dva[0]),
3498 				    DVA_GET_OFFSET(&bp->blk_dva[0]),
3499 				    DVA_GET_OFFSET(&bp->blk_dva[2])))
3500 					zb->zb_ditto_same_ms++;
3501 				else if (DVA_GET_VDEV(&bp->blk_dva[1]) ==
3502 				    DVA_GET_VDEV(&bp->blk_dva[2]) &&
3503 				    same_metaslab(zcb->zcb_spa,
3504 				    DVA_GET_VDEV(&bp->blk_dva[1]),
3505 				    DVA_GET_OFFSET(&bp->blk_dva[1]),
3506 				    DVA_GET_OFFSET(&bp->blk_dva[2])))
3507 					zb->zb_ditto_same_ms++;
3508 			}
3509 			break;
3510 		}
3511 	}
3512 
3513 	spa_config_exit(zcb->zcb_spa, SCL_CONFIG, FTAG);
3514 
3515 	if (BP_IS_EMBEDDED(bp)) {
3516 		zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
3517 		zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
3518 		    [BPE_GET_PSIZE(bp)]++;
3519 		return;
3520 	}
3521 
3522 	if (dump_opt['L'])
3523 		return;
3524 
3525 	if (BP_GET_DEDUP(bp)) {
3526 		ddt_t *ddt;
3527 		ddt_entry_t *dde;
3528 
3529 		ddt = ddt_select(zcb->zcb_spa, bp);
3530 		ddt_enter(ddt);
3531 		dde = ddt_lookup(ddt, bp, B_FALSE);
3532 
3533 		if (dde == NULL) {
3534 			refcnt = 0;
3535 		} else {
3536 			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
3537 			ddt_phys_decref(ddp);
3538 			refcnt = ddp->ddp_refcnt;
3539 			if (ddt_phys_total_refcnt(dde) == 0)
3540 				ddt_remove(ddt, dde);
3541 		}
3542 		ddt_exit(ddt);
3543 	}
3544 
3545 	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
3546 	    refcnt ? 0 : spa_min_claim_txg(zcb->zcb_spa),
3547 	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
3548 }
3549 
3550 static void
3551 zdb_blkptr_done(zio_t *zio)
3552 {
3553 	spa_t *spa = zio->io_spa;
3554 	blkptr_t *bp = zio->io_bp;
3555 	int ioerr = zio->io_error;
3556 	zdb_cb_t *zcb = zio->io_private;
3557 	zbookmark_phys_t *zb = &zio->io_bookmark;
3558 
3559 	abd_free(zio->io_abd);
3560 
3561 	mutex_enter(&spa->spa_scrub_lock);
3562 	spa->spa_load_verify_ios--;
3563 	cv_broadcast(&spa->spa_scrub_io_cv);
3564 
3565 	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
3566 		char blkbuf[BP_SPRINTF_LEN];
3567 
3568 		zcb->zcb_haderrors = 1;
3569 		zcb->zcb_errors[ioerr]++;
3570 
3571 		if (dump_opt['b'] >= 2)
3572 			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3573 		else
3574 			blkbuf[0] = '\0';
3575 
3576 		(void) printf("zdb_blkptr_cb: "
3577 		    "Got error %d reading "
3578 		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
3579 		    ioerr,
3580 		    (u_longlong_t)zb->zb_objset,
3581 		    (u_longlong_t)zb->zb_object,
3582 		    (u_longlong_t)zb->zb_level,
3583 		    (u_longlong_t)zb->zb_blkid,
3584 		    blkbuf);
3585 	}
3586 	mutex_exit(&spa->spa_scrub_lock);
3587 }
3588 
3589 static int
3590 zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
3591     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
3592 {
3593 	zdb_cb_t *zcb = arg;
3594 	dmu_object_type_t type;
3595 	boolean_t is_metadata;
3596 
3597 	if (bp == NULL)
3598 		return (0);
3599 
3600 	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
3601 		char blkbuf[BP_SPRINTF_LEN];
3602 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3603 		(void) printf("objset %llu object %llu "
3604 		    "level %lld offset 0x%llx %s\n",
3605 		    (u_longlong_t)zb->zb_objset,
3606 		    (u_longlong_t)zb->zb_object,
3607 		    (longlong_t)zb->zb_level,
3608 		    (u_longlong_t)blkid2offset(dnp, bp, zb),
3609 		    blkbuf);
3610 	}
3611 
3612 	if (BP_IS_HOLE(bp))
3613 		return (0);
3614 
3615 	type = BP_GET_TYPE(bp);
3616 
3617 	zdb_count_block(zcb, zilog, bp,
3618 	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
3619 
3620 	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
3621 
3622 	if (!BP_IS_EMBEDDED(bp) &&
3623 	    (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
3624 		size_t size = BP_GET_PSIZE(bp);
3625 		abd_t *abd = abd_alloc(size, B_FALSE);
3626 		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
3627 
3628 		/* If it's an intent log block, failure is expected. */
3629 		if (zb->zb_level == ZB_ZIL_LEVEL)
3630 			flags |= ZIO_FLAG_SPECULATIVE;
3631 
3632 		mutex_enter(&spa->spa_scrub_lock);
3633 		while (spa->spa_load_verify_ios > max_inflight)
3634 			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
3635 		spa->spa_load_verify_ios++;
3636 		mutex_exit(&spa->spa_scrub_lock);
3637 
3638 		zio_nowait(zio_read(NULL, spa, bp, abd, size,
3639 		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
3640 	}
3641 
3642 	zcb->zcb_readfails = 0;
3643 
3644 	/* only call gethrtime() every 100 blocks */
3645 	static int iters;
3646 	if (++iters > 100)
3647 		iters = 0;
3648 	else
3649 		return (0);
3650 
3651 	if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
3652 		uint64_t now = gethrtime();
3653 		char buf[10];
3654 		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
3655 		int kb_per_sec =
3656 		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
3657 		int sec_remaining =
3658 		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
3659 
3660 		/* make sure nicenum has enough space */
3661 		CTASSERT(sizeof (buf) >= NN_NUMBUF_SZ);
3662 
3663 		zfs_nicenum(bytes, buf, sizeof (buf));
3664 		(void) fprintf(stderr,
3665 		    "\r%5s completed (%4dMB/s) "
3666 		    "estimated time remaining: %uhr %02umin %02usec        ",
3667 		    buf, kb_per_sec / 1024,
3668 		    sec_remaining / 60 / 60,
3669 		    sec_remaining / 60 % 60,
3670 		    sec_remaining % 60);
3671 
3672 		zcb->zcb_lastprint = now;
3673 	}
3674 
3675 	return (0);
3676 }
3677 
3678 static void
3679 zdb_leak(void *arg, uint64_t start, uint64_t size)
3680 {
3681 	vdev_t *vd = arg;
3682 
3683 	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
3684 	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
3685 }
3686 
3687 static metaslab_ops_t zdb_metaslab_ops = {
3688 	NULL	/* alloc */
3689 };
3690 
3691 typedef int (*zdb_log_sm_cb_t)(spa_t *spa, space_map_entry_t *sme,
3692     uint64_t txg, void *arg);
3693 
3694 typedef struct unflushed_iter_cb_arg {
3695 	spa_t *uic_spa;
3696 	uint64_t uic_txg;
3697 	void *uic_arg;
3698 	zdb_log_sm_cb_t uic_cb;
3699 } unflushed_iter_cb_arg_t;
3700 
3701 static int
3702 iterate_through_spacemap_logs_cb(space_map_entry_t *sme, void *arg)
3703 {
3704 	unflushed_iter_cb_arg_t *uic = arg;
3705 
3706 	return (uic->uic_cb(uic->uic_spa, sme, uic->uic_txg, uic->uic_arg));
3707 }
3708 
3709 static void
3710 iterate_through_spacemap_logs(spa_t *spa, zdb_log_sm_cb_t cb, void *arg)
3711 {
3712 	if (!spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP))
3713 		return;
3714 
3715 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3716 	for (spa_log_sm_t *sls = avl_first(&spa->spa_sm_logs_by_txg);
3717 	    sls; sls = AVL_NEXT(&spa->spa_sm_logs_by_txg, sls)) {
3718 		space_map_t *sm = NULL;
3719 		VERIFY0(space_map_open(&sm, spa_meta_objset(spa),
3720 		    sls->sls_sm_obj, 0, UINT64_MAX, SPA_MINBLOCKSHIFT));
3721 
3722 		unflushed_iter_cb_arg_t uic = {
3723 			.uic_spa = spa,
3724 			.uic_txg = sls->sls_txg,
3725 			.uic_arg = arg,
3726 			.uic_cb = cb
3727 		};
3728 
3729 		VERIFY0(space_map_iterate(sm, space_map_length(sm),
3730 		    iterate_through_spacemap_logs_cb, &uic));
3731 		space_map_close(sm);
3732 	}
3733 	spa_config_exit(spa, SCL_CONFIG, FTAG);
3734 }
3735 
3736 /* ARGSUSED */
3737 static int
3738 load_unflushed_svr_segs_cb(spa_t *spa, space_map_entry_t *sme,
3739     uint64_t txg, void *arg)
3740 {
3741 	spa_vdev_removal_t *svr = arg;
3742 
3743 	uint64_t offset = sme->sme_offset;
3744 	uint64_t size = sme->sme_run;
3745 
3746 	/* skip vdevs we don't care about */
3747 	if (sme->sme_vdev != svr->svr_vdev_id)
3748 		return (0);
3749 
3750 	vdev_t *vd = vdev_lookup_top(spa, sme->sme_vdev);
3751 	metaslab_t *ms = vd->vdev_ms[offset >> vd->vdev_ms_shift];
3752 	ASSERT(sme->sme_type == SM_ALLOC || sme->sme_type == SM_FREE);
3753 
3754 	if (txg < metaslab_unflushed_txg(ms))
3755 		return (0);
3756 
3757 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3758 	ASSERT(vim != NULL);
3759 	if (offset >= vdev_indirect_mapping_max_offset(vim))
3760 		return (0);
3761 
3762 	if (sme->sme_type == SM_ALLOC)
3763 		range_tree_add(svr->svr_allocd_segs, offset, size);
3764 	else
3765 		range_tree_remove(svr->svr_allocd_segs, offset, size);
3766 
3767 	return (0);
3768 }
3769 
3770 static void
3771 zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
3772 {
3773 	ddt_bookmark_t ddb;
3774 	ddt_entry_t dde;
3775 	int error;
3776 
3777 	ASSERT(!dump_opt['L']);
3778 
3779 	bzero(&ddb, sizeof (ddb));
3780 	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
3781 		blkptr_t blk;
3782 		ddt_phys_t *ddp = dde.dde_phys;
3783 
3784 		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
3785 			return;
3786 
3787 		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
3788 
3789 		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
3790 			if (ddp->ddp_phys_birth == 0)
3791 				continue;
3792 			ddt_bp_create(ddb.ddb_checksum,
3793 			    &dde.dde_key, ddp, &blk);
3794 			if (p == DDT_PHYS_DITTO) {
3795 				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
3796 			} else {
3797 				zcb->zcb_dedup_asize +=
3798 				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
3799 				zcb->zcb_dedup_blocks++;
3800 			}
3801 		}
3802 		ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
3803 		ddt_enter(ddt);
3804 		VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
3805 		ddt_exit(ddt);
3806 	}
3807 
3808 	ASSERT(error == ENOENT);
3809 }
3810 
3811 /* ARGSUSED */
3812 static void
3813 claim_segment_impl_cb(uint64_t inner_offset, vdev_t *vd, uint64_t offset,
3814     uint64_t size, void *arg)
3815 {
3816 	/*
3817 	 * This callback was called through a remap from
3818 	 * a device being removed. Therefore, the vdev that
3819 	 * this callback is applied to is a concrete
3820 	 * vdev.
3821 	 */
3822 	ASSERT(vdev_is_concrete(vd));
3823 
3824 	VERIFY0(metaslab_claim_impl(vd, offset, size,
3825 	    spa_min_claim_txg(vd->vdev_spa)));
3826 }
3827 
3828 static void
3829 claim_segment_cb(void *arg, uint64_t offset, uint64_t size)
3830 {
3831 	vdev_t *vd = arg;
3832 
3833 	vdev_indirect_ops.vdev_op_remap(vd, offset, size,
3834 	    claim_segment_impl_cb, NULL);
3835 }
3836 
3837 /*
3838  * After accounting for all allocated blocks that are directly referenced,
3839  * we might have missed a reference to a block from a partially complete
3840  * (and thus unused) indirect mapping object. We perform a secondary pass
3841  * through the metaslabs we have already mapped and claim the destination
3842  * blocks.
3843  */
3844 static void
3845 zdb_claim_removing(spa_t *spa, zdb_cb_t *zcb)
3846 {
3847 	if (dump_opt['L'])
3848 		return;
3849 
3850 	if (spa->spa_vdev_removal == NULL)
3851 		return;
3852 
3853 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3854 
3855 	spa_vdev_removal_t *svr = spa->spa_vdev_removal;
3856 	vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id);
3857 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3858 
3859 	ASSERT0(range_tree_space(svr->svr_allocd_segs));
3860 
3861 	range_tree_t *allocs = range_tree_create(NULL, RANGE_SEG64, NULL, 0, 0);
3862 	for (uint64_t msi = 0; msi < vd->vdev_ms_count; msi++) {
3863 		metaslab_t *msp = vd->vdev_ms[msi];
3864 
3865 		if (msp->ms_start >= vdev_indirect_mapping_max_offset(vim))
3866 			break;
3867 
3868 		ASSERT0(range_tree_space(allocs));
3869 		if (msp->ms_sm != NULL)
3870 			VERIFY0(space_map_load(msp->ms_sm, allocs, SM_ALLOC));
3871 		range_tree_vacate(allocs, range_tree_add, svr->svr_allocd_segs);
3872 	}
3873 	range_tree_destroy(allocs);
3874 
3875 	iterate_through_spacemap_logs(spa, load_unflushed_svr_segs_cb, svr);
3876 
3877 	/*
3878 	 * Clear everything past what has been synced,
3879 	 * because we have not allocated mappings for
3880 	 * it yet.
3881 	 */
3882 	range_tree_clear(svr->svr_allocd_segs,
3883 	    vdev_indirect_mapping_max_offset(vim),
3884 	    vd->vdev_asize - vdev_indirect_mapping_max_offset(vim));
3885 
3886 	zcb->zcb_removing_size += range_tree_space(svr->svr_allocd_segs);
3887 	range_tree_vacate(svr->svr_allocd_segs, claim_segment_cb, vd);
3888 
3889 	spa_config_exit(spa, SCL_CONFIG, FTAG);
3890 }
3891 
3892 /* ARGSUSED */
3893 static int
3894 increment_indirect_mapping_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3895 {
3896 	zdb_cb_t *zcb = arg;
3897 	spa_t *spa = zcb->zcb_spa;
3898 	vdev_t *vd;
3899 	const dva_t *dva = &bp->blk_dva[0];
3900 
3901 	ASSERT(!dump_opt['L']);
3902 	ASSERT3U(BP_GET_NDVAS(bp), ==, 1);
3903 
3904 	spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
3905 	vd = vdev_lookup_top(zcb->zcb_spa, DVA_GET_VDEV(dva));
3906 	ASSERT3P(vd, !=, NULL);
3907 	spa_config_exit(spa, SCL_VDEV, FTAG);
3908 
3909 	ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0);
3910 	ASSERT3P(zcb->zcb_vd_obsolete_counts[vd->vdev_id], !=, NULL);
3911 
3912 	vdev_indirect_mapping_increment_obsolete_count(
3913 	    vd->vdev_indirect_mapping,
3914 	    DVA_GET_OFFSET(dva), DVA_GET_ASIZE(dva),
3915 	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3916 
3917 	return (0);
3918 }
3919 
3920 static uint32_t *
3921 zdb_load_obsolete_counts(vdev_t *vd)
3922 {
3923 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3924 	spa_t *spa = vd->vdev_spa;
3925 	spa_condensing_indirect_phys_t *scip =
3926 	    &spa->spa_condensing_indirect_phys;
3927 	uint32_t *counts;
3928 
3929 	EQUIV(vdev_obsolete_sm_object(vd) != 0, vd->vdev_obsolete_sm != NULL);
3930 	counts = vdev_indirect_mapping_load_obsolete_counts(vim);
3931 	if (vd->vdev_obsolete_sm != NULL) {
3932 		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3933 		    vd->vdev_obsolete_sm);
3934 	}
3935 	if (scip->scip_vdev == vd->vdev_id &&
3936 	    scip->scip_prev_obsolete_sm_object != 0) {
3937 		space_map_t *prev_obsolete_sm = NULL;
3938 		VERIFY0(space_map_open(&prev_obsolete_sm, spa->spa_meta_objset,
3939 		    scip->scip_prev_obsolete_sm_object, 0, vd->vdev_asize, 0));
3940 		vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3941 		    prev_obsolete_sm);
3942 		space_map_close(prev_obsolete_sm);
3943 	}
3944 	return (counts);
3945 }
3946 
3947 typedef struct checkpoint_sm_exclude_entry_arg {
3948 	vdev_t *cseea_vd;
3949 	uint64_t cseea_checkpoint_size;
3950 } checkpoint_sm_exclude_entry_arg_t;
3951 
3952 static int
3953 checkpoint_sm_exclude_entry_cb(space_map_entry_t *sme, void *arg)
3954 {
3955 	checkpoint_sm_exclude_entry_arg_t *cseea = arg;
3956 	vdev_t *vd = cseea->cseea_vd;
3957 	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
3958 	uint64_t end = sme->sme_offset + sme->sme_run;
3959 
3960 	ASSERT(sme->sme_type == SM_FREE);
3961 
3962 	/*
3963 	 * Since the vdev_checkpoint_sm exists in the vdev level
3964 	 * and the ms_sm space maps exist in the metaslab level,
3965 	 * an entry in the checkpoint space map could theoretically
3966 	 * cross the boundaries of the metaslab that it belongs.
3967 	 *
3968 	 * In reality, because of the way that we populate and
3969 	 * manipulate the checkpoint's space maps currently,
3970 	 * there shouldn't be any entries that cross metaslabs.
3971 	 * Hence the assertion below.
3972 	 *
3973 	 * That said, there is no fundamental requirement that
3974 	 * the checkpoint's space map entries should not cross
3975 	 * metaslab boundaries. So if needed we could add code
3976 	 * that handles metaslab-crossing segments in the future.
3977 	 */
3978 	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
3979 	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
3980 
3981 	/*
3982 	 * By removing the entry from the allocated segments we
3983 	 * also verify that the entry is there to begin with.
3984 	 */
3985 	mutex_enter(&ms->ms_lock);
3986 	range_tree_remove(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
3987 	mutex_exit(&ms->ms_lock);
3988 
3989 	cseea->cseea_checkpoint_size += sme->sme_run;
3990 	return (0);
3991 }
3992 
3993 static void
3994 zdb_leak_init_vdev_exclude_checkpoint(vdev_t *vd, zdb_cb_t *zcb)
3995 {
3996 	spa_t *spa = vd->vdev_spa;
3997 	space_map_t *checkpoint_sm = NULL;
3998 	uint64_t checkpoint_sm_obj;
3999 
4000 	/*
4001 	 * If there is no vdev_top_zap, we are in a pool whose
4002 	 * version predates the pool checkpoint feature.
4003 	 */
4004 	if (vd->vdev_top_zap == 0)
4005 		return;
4006 
4007 	/*
4008 	 * If there is no reference of the vdev_checkpoint_sm in
4009 	 * the vdev_top_zap, then one of the following scenarios
4010 	 * is true:
4011 	 *
4012 	 * 1] There is no checkpoint
4013 	 * 2] There is a checkpoint, but no checkpointed blocks
4014 	 *    have been freed yet
4015 	 * 3] The current vdev is indirect
4016 	 *
4017 	 * In these cases we return immediately.
4018 	 */
4019 	if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
4020 	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4021 		return;
4022 
4023 	VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
4024 	    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1,
4025 	    &checkpoint_sm_obj));
4026 
4027 	checkpoint_sm_exclude_entry_arg_t cseea;
4028 	cseea.cseea_vd = vd;
4029 	cseea.cseea_checkpoint_size = 0;
4030 
4031 	VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
4032 	    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
4033 
4034 	VERIFY0(space_map_iterate(checkpoint_sm,
4035 	    space_map_length(checkpoint_sm),
4036 	    checkpoint_sm_exclude_entry_cb, &cseea));
4037 	space_map_close(checkpoint_sm);
4038 
4039 	zcb->zcb_checkpoint_size += cseea.cseea_checkpoint_size;
4040 }
4041 
4042 static void
4043 zdb_leak_init_exclude_checkpoint(spa_t *spa, zdb_cb_t *zcb)
4044 {
4045 	ASSERT(!dump_opt['L']);
4046 
4047 	vdev_t *rvd = spa->spa_root_vdev;
4048 	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
4049 		ASSERT3U(c, ==, rvd->vdev_child[c]->vdev_id);
4050 		zdb_leak_init_vdev_exclude_checkpoint(rvd->vdev_child[c], zcb);
4051 	}
4052 }
4053 
4054 static int
4055 count_unflushed_space_cb(spa_t *spa, space_map_entry_t *sme,
4056     uint64_t txg, void *arg)
4057 {
4058 	int64_t *ualloc_space = arg;
4059 	uint64_t offset = sme->sme_offset;
4060 	uint64_t vdev_id = sme->sme_vdev;
4061 
4062 	vdev_t *vd = vdev_lookup_top(spa, vdev_id);
4063 	if (!vdev_is_concrete(vd))
4064 		return (0);
4065 
4066 	metaslab_t *ms = vd->vdev_ms[offset >> vd->vdev_ms_shift];
4067 	ASSERT(sme->sme_type == SM_ALLOC || sme->sme_type == SM_FREE);
4068 
4069 	if (txg < metaslab_unflushed_txg(ms))
4070 		return (0);
4071 
4072 	if (sme->sme_type == SM_ALLOC)
4073 		*ualloc_space += sme->sme_run;
4074 	else
4075 		*ualloc_space -= sme->sme_run;
4076 
4077 	return (0);
4078 }
4079 
4080 static int64_t
4081 get_unflushed_alloc_space(spa_t *spa)
4082 {
4083 	if (dump_opt['L'])
4084 		return (0);
4085 
4086 	int64_t ualloc_space = 0;
4087 	iterate_through_spacemap_logs(spa, count_unflushed_space_cb,
4088 	    &ualloc_space);
4089 	return (ualloc_space);
4090 }
4091 
4092 static int
4093 load_unflushed_cb(spa_t *spa, space_map_entry_t *sme, uint64_t txg, void *arg)
4094 {
4095 	maptype_t *uic_maptype = arg;
4096 	uint64_t offset = sme->sme_offset;
4097 	uint64_t size = sme->sme_run;
4098 	uint64_t vdev_id = sme->sme_vdev;
4099 	vdev_t *vd = vdev_lookup_top(spa, vdev_id);
4100 
4101 	/* skip indirect vdevs */
4102 	if (!vdev_is_concrete(vd))
4103 		return (0);
4104 
4105 	metaslab_t *ms = vd->vdev_ms[offset >> vd->vdev_ms_shift];
4106 
4107 	ASSERT(sme->sme_type == SM_ALLOC || sme->sme_type == SM_FREE);
4108 	ASSERT(*uic_maptype == SM_ALLOC || *uic_maptype == SM_FREE);
4109 
4110 	if (txg < metaslab_unflushed_txg(ms))
4111 		return (0);
4112 
4113 	if (*uic_maptype == sme->sme_type)
4114 		range_tree_add(ms->ms_allocatable, offset, size);
4115 	else
4116 		range_tree_remove(ms->ms_allocatable, offset, size);
4117 
4118 	return (0);
4119 }
4120 
4121 static void
4122 load_unflushed_to_ms_allocatables(spa_t *spa, maptype_t maptype)
4123 {
4124 	iterate_through_spacemap_logs(spa, load_unflushed_cb, &maptype);
4125 }
4126 
4127 static void
4128 load_concrete_ms_allocatable_trees(spa_t *spa, maptype_t maptype)
4129 {
4130 	vdev_t *rvd = spa->spa_root_vdev;
4131 	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
4132 		vdev_t *vd = rvd->vdev_child[i];
4133 
4134 		ASSERT3U(i, ==, vd->vdev_id);
4135 
4136 		if (vd->vdev_ops == &vdev_indirect_ops)
4137 			continue;
4138 
4139 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
4140 			metaslab_t *msp = vd->vdev_ms[m];
4141 
4142 			(void) fprintf(stderr,
4143 			    "\rloading concrete vdev %llu, "
4144 			    "metaslab %llu of %llu ...",
4145 			    (longlong_t)vd->vdev_id,
4146 			    (longlong_t)msp->ms_id,
4147 			    (longlong_t)vd->vdev_ms_count);
4148 
4149 			mutex_enter(&msp->ms_lock);
4150 			range_tree_vacate(msp->ms_allocatable, NULL, NULL);
4151 
4152 			/*
4153 			 * We don't want to spend the CPU manipulating the
4154 			 * size-ordered tree, so clear the range_tree ops.
4155 			 */
4156 			msp->ms_allocatable->rt_ops = NULL;
4157 
4158 			if (msp->ms_sm != NULL) {
4159 				VERIFY0(space_map_load(msp->ms_sm,
4160 				    msp->ms_allocatable, maptype));
4161 			}
4162 			if (!msp->ms_loaded)
4163 				msp->ms_loaded = B_TRUE;
4164 			mutex_exit(&msp->ms_lock);
4165 		}
4166 	}
4167 
4168 	load_unflushed_to_ms_allocatables(spa, maptype);
4169 }
4170 
4171 /*
4172  * vm_idxp is an in-out parameter which (for indirect vdevs) is the
4173  * index in vim_entries that has the first entry in this metaslab.
4174  * On return, it will be set to the first entry after this metaslab.
4175  */
4176 static void
4177 load_indirect_ms_allocatable_tree(vdev_t *vd, metaslab_t *msp,
4178     uint64_t *vim_idxp)
4179 {
4180 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
4181 
4182 	mutex_enter(&msp->ms_lock);
4183 	range_tree_vacate(msp->ms_allocatable, NULL, NULL);
4184 
4185 	/*
4186 	 * We don't want to spend the CPU manipulating the
4187 	 * size-ordered tree, so clear the range_tree ops.
4188 	 */
4189 	msp->ms_allocatable->rt_ops = NULL;
4190 
4191 	for (; *vim_idxp < vdev_indirect_mapping_num_entries(vim);
4192 	    (*vim_idxp)++) {
4193 		vdev_indirect_mapping_entry_phys_t *vimep =
4194 		    &vim->vim_entries[*vim_idxp];
4195 		uint64_t ent_offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
4196 		uint64_t ent_len = DVA_GET_ASIZE(&vimep->vimep_dst);
4197 		ASSERT3U(ent_offset, >=, msp->ms_start);
4198 		if (ent_offset >= msp->ms_start + msp->ms_size)
4199 			break;
4200 
4201 		/*
4202 		 * Mappings do not cross metaslab boundaries,
4203 		 * because we create them by walking the metaslabs.
4204 		 */
4205 		ASSERT3U(ent_offset + ent_len, <=,
4206 		    msp->ms_start + msp->ms_size);
4207 		range_tree_add(msp->ms_allocatable, ent_offset, ent_len);
4208 	}
4209 
4210 	if (!msp->ms_loaded)
4211 		msp->ms_loaded = B_TRUE;
4212 	mutex_exit(&msp->ms_lock);
4213 }
4214 
4215 static void
4216 zdb_leak_init_prepare_indirect_vdevs(spa_t *spa, zdb_cb_t *zcb)
4217 {
4218 	ASSERT(!dump_opt['L']);
4219 
4220 	vdev_t *rvd = spa->spa_root_vdev;
4221 	for (uint64_t c = 0; c < rvd->vdev_children; c++) {
4222 		vdev_t *vd = rvd->vdev_child[c];
4223 
4224 		ASSERT3U(c, ==, vd->vdev_id);
4225 
4226 		if (vd->vdev_ops != &vdev_indirect_ops)
4227 			continue;
4228 
4229 		/*
4230 		 * Note: we don't check for mapping leaks on
4231 		 * removing vdevs because their ms_allocatable's
4232 		 * are used to look for leaks in allocated space.
4233 		 */
4234 		zcb->zcb_vd_obsolete_counts[c] = zdb_load_obsolete_counts(vd);
4235 
4236 		/*
4237 		 * Normally, indirect vdevs don't have any
4238 		 * metaslabs.  We want to set them up for
4239 		 * zio_claim().
4240 		 */
4241 		VERIFY0(vdev_metaslab_init(vd, 0));
4242 
4243 		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
4244 		uint64_t vim_idx = 0;
4245 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
4246 
4247 			(void) fprintf(stderr,
4248 			    "\rloading indirect vdev %llu, "
4249 			    "metaslab %llu of %llu ...",
4250 			    (longlong_t)vd->vdev_id,
4251 			    (longlong_t)vd->vdev_ms[m]->ms_id,
4252 			    (longlong_t)vd->vdev_ms_count);
4253 
4254 			load_indirect_ms_allocatable_tree(vd, vd->vdev_ms[m],
4255 			    &vim_idx);
4256 		}
4257 		ASSERT3U(vim_idx, ==, vdev_indirect_mapping_num_entries(vim));
4258 	}
4259 }
4260 
4261 static void
4262 zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
4263 {
4264 	zcb->zcb_spa = spa;
4265 
4266 	if (dump_opt['L'])
4267 		return;
4268 
4269 	dsl_pool_t *dp = spa->spa_dsl_pool;
4270 	vdev_t *rvd = spa->spa_root_vdev;
4271 
4272 	/*
4273 	 * We are going to be changing the meaning of the metaslab's
4274 	 * ms_allocatable.  Ensure that the allocator doesn't try to
4275 	 * use the tree.
4276 	 */
4277 	spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
4278 	spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
4279 
4280 	zcb->zcb_vd_obsolete_counts =
4281 	    umem_zalloc(rvd->vdev_children * sizeof (uint32_t *),
4282 	    UMEM_NOFAIL);
4283 
4284 	/*
4285 	 * For leak detection, we overload the ms_allocatable trees
4286 	 * to contain allocated segments instead of free segments.
4287 	 * As a result, we can't use the normal metaslab_load/unload
4288 	 * interfaces.
4289 	 */
4290 	zdb_leak_init_prepare_indirect_vdevs(spa, zcb);
4291 	load_concrete_ms_allocatable_trees(spa, SM_ALLOC);
4292 
4293 	/*
4294 	 * On load_concrete_ms_allocatable_trees() we loaded all the
4295 	 * allocated entries from the ms_sm to the ms_allocatable for
4296 	 * each metaslab. If the pool has a checkpoint or is in the
4297 	 * middle of discarding a checkpoint, some of these blocks
4298 	 * may have been freed but their ms_sm may not have been
4299 	 * updated because they are referenced by the checkpoint. In
4300 	 * order to avoid false-positives during leak-detection, we
4301 	 * go through the vdev's checkpoint space map and exclude all
4302 	 * its entries from their relevant ms_allocatable.
4303 	 *
4304 	 * We also aggregate the space held by the checkpoint and add
4305 	 * it to zcb_checkpoint_size.
4306 	 *
4307 	 * Note that at this point we are also verifying that all the
4308 	 * entries on the checkpoint_sm are marked as allocated in
4309 	 * the ms_sm of their relevant metaslab.
4310 	 * [see comment in checkpoint_sm_exclude_entry_cb()]
4311 	 */
4312 	zdb_leak_init_exclude_checkpoint(spa, zcb);
4313 	ASSERT3U(zcb->zcb_checkpoint_size, ==, spa_get_checkpoint_space(spa));
4314 
4315 	/* for cleaner progress output */
4316 	(void) fprintf(stderr, "\n");
4317 
4318 	if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
4319 		ASSERT(spa_feature_is_enabled(spa,
4320 		    SPA_FEATURE_DEVICE_REMOVAL));
4321 		(void) bpobj_iterate_nofree(&dp->dp_obsolete_bpobj,
4322 		    increment_indirect_mapping_cb, zcb, NULL);
4323 	}
4324 
4325 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4326 	zdb_ddt_leak_init(spa, zcb);
4327 	spa_config_exit(spa, SCL_CONFIG, FTAG);
4328 }
4329 
4330 static boolean_t
4331 zdb_check_for_obsolete_leaks(vdev_t *vd, zdb_cb_t *zcb)
4332 {
4333 	boolean_t leaks = B_FALSE;
4334 	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
4335 	uint64_t total_leaked = 0;
4336 
4337 	ASSERT(vim != NULL);
4338 
4339 	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
4340 		vdev_indirect_mapping_entry_phys_t *vimep =
4341 		    &vim->vim_entries[i];
4342 		uint64_t obsolete_bytes = 0;
4343 		uint64_t offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
4344 		metaslab_t *msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
4345 
4346 		/*
4347 		 * This is not very efficient but it's easy to
4348 		 * verify correctness.
4349 		 */
4350 		for (uint64_t inner_offset = 0;
4351 		    inner_offset < DVA_GET_ASIZE(&vimep->vimep_dst);
4352 		    inner_offset += 1 << vd->vdev_ashift) {
4353 			if (range_tree_contains(msp->ms_allocatable,
4354 			    offset + inner_offset, 1 << vd->vdev_ashift)) {
4355 				obsolete_bytes += 1 << vd->vdev_ashift;
4356 			}
4357 		}
4358 
4359 		int64_t bytes_leaked = obsolete_bytes -
4360 		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i];
4361 		ASSERT3U(DVA_GET_ASIZE(&vimep->vimep_dst), >=,
4362 		    zcb->zcb_vd_obsolete_counts[vd->vdev_id][i]);
4363 		if (bytes_leaked != 0 &&
4364 		    (vdev_obsolete_counts_are_precise(vd) ||
4365 		    dump_opt['d'] >= 5)) {
4366 			(void) printf("obsolete indirect mapping count "
4367 			    "mismatch on %llu:%llx:%llx : %llx bytes leaked\n",
4368 			    (u_longlong_t)vd->vdev_id,
4369 			    (u_longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
4370 			    (u_longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
4371 			    (u_longlong_t)bytes_leaked);
4372 		}
4373 		total_leaked += ABS(bytes_leaked);
4374 	}
4375 
4376 	if (!vdev_obsolete_counts_are_precise(vd) && total_leaked > 0) {
4377 		int pct_leaked = total_leaked * 100 /
4378 		    vdev_indirect_mapping_bytes_mapped(vim);
4379 		(void) printf("cannot verify obsolete indirect mapping "
4380 		    "counts of vdev %llu because precise feature was not "
4381 		    "enabled when it was removed: %d%% (%llx bytes) of mapping"
4382 		    "unreferenced\n",
4383 		    (u_longlong_t)vd->vdev_id, pct_leaked,
4384 		    (u_longlong_t)total_leaked);
4385 	} else if (total_leaked > 0) {
4386 		(void) printf("obsolete indirect mapping count mismatch "
4387 		    "for vdev %llu -- %llx total bytes mismatched\n",
4388 		    (u_longlong_t)vd->vdev_id,
4389 		    (u_longlong_t)total_leaked);
4390 		leaks |= B_TRUE;
4391 	}
4392 
4393 	vdev_indirect_mapping_free_obsolete_counts(vim,
4394 	    zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
4395 	zcb->zcb_vd_obsolete_counts[vd->vdev_id] = NULL;
4396 
4397 	return (leaks);
4398 }
4399 
4400 static boolean_t
4401 zdb_leak_fini(spa_t *spa, zdb_cb_t *zcb)
4402 {
4403 	if (dump_opt['L'])
4404 		return (B_FALSE);
4405 
4406 	boolean_t leaks = B_FALSE;
4407 
4408 	vdev_t *rvd = spa->spa_root_vdev;
4409 	for (unsigned c = 0; c < rvd->vdev_children; c++) {
4410 		vdev_t *vd = rvd->vdev_child[c];
4411 #if DEBUG
4412 		metaslab_group_t *mg = vd->vdev_mg;
4413 #endif
4414 
4415 		if (zcb->zcb_vd_obsolete_counts[c] != NULL) {
4416 			leaks |= zdb_check_for_obsolete_leaks(vd, zcb);
4417 		}
4418 
4419 		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
4420 			metaslab_t *msp = vd->vdev_ms[m];
4421 			ASSERT3P(mg, ==, msp->ms_group);
4422 
4423 			/*
4424 			 * ms_allocatable has been overloaded
4425 			 * to contain allocated segments. Now that
4426 			 * we finished traversing all blocks, any
4427 			 * block that remains in the ms_allocatable
4428 			 * represents an allocated block that we
4429 			 * did not claim during the traversal.
4430 			 * Claimed blocks would have been removed
4431 			 * from the ms_allocatable.  For indirect
4432 			 * vdevs, space remaining in the tree
4433 			 * represents parts of the mapping that are
4434 			 * not referenced, which is not a bug.
4435 			 */
4436 			if (vd->vdev_ops == &vdev_indirect_ops) {
4437 				range_tree_vacate(msp->ms_allocatable,
4438 				    NULL, NULL);
4439 			} else {
4440 				range_tree_vacate(msp->ms_allocatable,
4441 				    zdb_leak, vd);
4442 			}
4443 			if (msp->ms_loaded) {
4444 				msp->ms_loaded = B_FALSE;
4445 			}
4446 		}
4447 
4448 	}
4449 
4450 	umem_free(zcb->zcb_vd_obsolete_counts,
4451 	    rvd->vdev_children * sizeof (uint32_t *));
4452 	zcb->zcb_vd_obsolete_counts = NULL;
4453 
4454 	return (leaks);
4455 }
4456 
4457 /* ARGSUSED */
4458 static int
4459 count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
4460 {
4461 	zdb_cb_t *zcb = arg;
4462 
4463 	if (dump_opt['b'] >= 5) {
4464 		char blkbuf[BP_SPRINTF_LEN];
4465 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
4466 		(void) printf("[%s] %s\n",
4467 		    "deferred free", blkbuf);
4468 	}
4469 	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
4470 	return (0);
4471 }
4472 
4473 static int
4474 dump_block_stats(spa_t *spa)
4475 {
4476 	zdb_cb_t zcb;
4477 	zdb_blkstats_t *zb, *tzb;
4478 	uint64_t norm_alloc, norm_space, total_alloc, total_found;
4479 	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA |
4480 	    TRAVERSE_NO_DECRYPT | TRAVERSE_HARD;
4481 	boolean_t leaks = B_FALSE;
4482 	int err;
4483 
4484 	bzero(&zcb, sizeof (zcb));
4485 	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
4486 	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
4487 	    (dump_opt['c'] == 1) ? "metadata " : "",
4488 	    dump_opt['c'] ? "checksums " : "",
4489 	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
4490 	    !dump_opt['L'] ? "nothing leaked " : "");
4491 
4492 	/*
4493 	 * When leak detection is enabled we load all space maps as SM_ALLOC
4494 	 * maps, then traverse the pool claiming each block we discover. If
4495 	 * the pool is perfectly consistent, the segment trees will be empty
4496 	 * when we're done. Anything left over is a leak; any block we can't
4497 	 * claim (because it's not part of any space map) is a double
4498 	 * allocation, reference to a freed block, or an unclaimed log block.
4499 	 *
4500 	 * When leak detection is disabled (-L option) we still traverse the
4501 	 * pool claiming each block we discover, but we skip opening any space
4502 	 * maps.
4503 	 */
4504 	bzero(&zcb, sizeof (zdb_cb_t));
4505 	zdb_leak_init(spa, &zcb);
4506 
4507 	/*
4508 	 * If there's a deferred-free bplist, process that first.
4509 	 */
4510 	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
4511 	    count_block_cb, &zcb, NULL);
4512 
4513 	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
4514 		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
4515 		    count_block_cb, &zcb, NULL);
4516 	}
4517 
4518 	zdb_claim_removing(spa, &zcb);
4519 
4520 	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
4521 		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
4522 		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
4523 		    &zcb, NULL));
4524 	}
4525 
4526 	if (dump_opt['c'] > 1)
4527 		flags |= TRAVERSE_PREFETCH_DATA;
4528 
4529 	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
4530 	zcb.zcb_totalasize += metaslab_class_get_alloc(spa_special_class(spa));
4531 	zcb.zcb_totalasize += metaslab_class_get_alloc(spa_dedup_class(spa));
4532 	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
4533 	err = traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
4534 
4535 	/*
4536 	 * If we've traversed the data blocks then we need to wait for those
4537 	 * I/Os to complete. We leverage "The Godfather" zio to wait on
4538 	 * all async I/Os to complete.
4539 	 */
4540 	if (dump_opt['c']) {
4541 		for (int i = 0; i < max_ncpus; i++) {
4542 			(void) zio_wait(spa->spa_async_zio_root[i]);
4543 			spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
4544 			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
4545 			    ZIO_FLAG_GODFATHER);
4546 		}
4547 	}
4548 
4549 	/*
4550 	 * Done after zio_wait() since zcb_haderrors is modified in
4551 	 * zdb_blkptr_done()
4552 	 */
4553 	zcb.zcb_haderrors |= err;
4554 
4555 	if (zcb.zcb_haderrors) {
4556 		(void) printf("\nError counts:\n\n");
4557 		(void) printf("\t%5s  %s\n", "errno", "count");
4558 		for (int e = 0; e < 256; e++) {
4559 			if (zcb.zcb_errors[e] != 0) {
4560 				(void) printf("\t%5d  %llu\n",
4561 				    e, (u_longlong_t)zcb.zcb_errors[e]);
4562 			}
4563 		}
4564 	}
4565 
4566 	/*
4567 	 * Report any leaked segments.
4568 	 */
4569 	leaks |= zdb_leak_fini(spa, &zcb);
4570 
4571 	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
4572 
4573 	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
4574 	norm_space = metaslab_class_get_space(spa_normal_class(spa));
4575 
4576 	total_alloc = norm_alloc +
4577 	    metaslab_class_get_alloc(spa_log_class(spa)) +
4578 	    metaslab_class_get_alloc(spa_special_class(spa)) +
4579 	    metaslab_class_get_alloc(spa_dedup_class(spa)) +
4580 	    get_unflushed_alloc_space(spa);
4581 	total_found = tzb->zb_asize - zcb.zcb_dedup_asize +
4582 	    zcb.zcb_removing_size + zcb.zcb_checkpoint_size;
4583 
4584 	if (total_found == total_alloc && !dump_opt['L']) {
4585 		(void) printf("\n\tNo leaks (block sum matches space"
4586 		    " maps exactly)\n");
4587 	} else if (!dump_opt['L']) {
4588 		(void) printf("block traversal size %llu != alloc %llu "
4589 		    "(%s %lld)\n",
4590 		    (u_longlong_t)total_found,
4591 		    (u_longlong_t)total_alloc,
4592 		    (dump_opt['L']) ? "unreachable" : "leaked",
4593 		    (longlong_t)(total_alloc - total_found));
4594 		leaks = B_TRUE;
4595 	}
4596 
4597 	if (tzb->zb_count == 0)
4598 		return (2);
4599 
4600 	(void) printf("\n");
4601 	(void) printf("\t%-16s %14llu\n", "bp count:",
4602 	    (u_longlong_t)tzb->zb_count);
4603 	(void) printf("\t%-16s %14llu\n", "ganged count:",
4604 	    (longlong_t)tzb->zb_gangs);
4605 	(void) printf("\t%-16s %14llu      avg: %6llu\n", "bp logical:",
4606 	    (u_longlong_t)tzb->zb_lsize,
4607 	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
4608 	(void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
4609 	    "bp physical:", (u_longlong_t)tzb->zb_psize,
4610 	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
4611 	    (double)tzb->zb_lsize / tzb->zb_psize);
4612 	(void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
4613 	    "bp allocated:", (u_longlong_t)tzb->zb_asize,
4614 	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
4615 	    (double)tzb->zb_lsize / tzb->zb_asize);
4616 	(void) printf("\t%-16s %14llu    ref>1: %6llu   deduplication: %6.2f\n",
4617 	    "bp deduped:", (u_longlong_t)zcb.zcb_dedup_asize,
4618 	    (u_longlong_t)zcb.zcb_dedup_blocks,
4619 	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
4620 	(void) printf("\t%-16s %14llu     used: %5.2f%%\n", "Normal class:",
4621 	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
4622 
4623 	if (spa_special_class(spa)->mc_rotor != NULL) {
4624 		uint64_t alloc = metaslab_class_get_alloc(
4625 		    spa_special_class(spa));
4626 		uint64_t space = metaslab_class_get_space(
4627 		    spa_special_class(spa));
4628 
4629 		(void) printf("\t%-16s %14llu     used: %5.2f%%\n",
4630 		    "Special class", (u_longlong_t)alloc,
4631 		    100.0 * alloc / space);
4632 	}
4633 
4634 	if (spa_dedup_class(spa)->mc_rotor != NULL) {
4635 		uint64_t alloc = metaslab_class_get_alloc(
4636 		    spa_dedup_class(spa));
4637 		uint64_t space = metaslab_class_get_space(
4638 		    spa_dedup_class(spa));
4639 
4640 		(void) printf("\t%-16s %14llu     used: %5.2f%%\n",
4641 		    "Dedup class", (u_longlong_t)alloc,
4642 		    100.0 * alloc / space);
4643 	}
4644 
4645 	for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
4646 		if (zcb.zcb_embedded_blocks[i] == 0)
4647 			continue;
4648 		(void) printf("\n");
4649 		(void) printf("\tadditional, non-pointer bps of type %u: "
4650 		    "%10llu\n",
4651 		    i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
4652 
4653 		if (dump_opt['b'] >= 3) {
4654 			(void) printf("\t number of (compressed) bytes:  "
4655 			    "number of bps\n");
4656 			dump_histogram(zcb.zcb_embedded_histogram[i],
4657 			    sizeof (zcb.zcb_embedded_histogram[i]) /
4658 			    sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
4659 		}
4660 	}
4661 
4662 	if (tzb->zb_ditto_samevdev != 0) {
4663 		(void) printf("\tDittoed blocks on same vdev: %llu\n",
4664 		    (longlong_t)tzb->zb_ditto_samevdev);
4665 	}
4666 	if (tzb->zb_ditto_same_ms != 0) {
4667 		(void) printf("\tDittoed blocks in same metaslab: %llu\n",
4668 		    (longlong_t)tzb->zb_ditto_same_ms);
4669 	}
4670 
4671 	for (uint64_t v = 0; v < spa->spa_root_vdev->vdev_children; v++) {
4672 		vdev_t *vd = spa->spa_root_vdev->vdev_child[v];
4673 		vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
4674 
4675 		if (vim == NULL) {
4676 			continue;
4677 		}
4678 
4679 		char mem[32];
4680 		zdb_nicenum(vdev_indirect_mapping_num_entries(vim),
4681 		    mem, vdev_indirect_mapping_size(vim));
4682 
4683 		(void) printf("\tindirect vdev id %llu has %llu segments "
4684 		    "(%s in memory)\n",
4685 		    (longlong_t)vd->vdev_id,
4686 		    (longlong_t)vdev_indirect_mapping_num_entries(vim), mem);
4687 	}
4688 
4689 	if (dump_opt['b'] >= 2) {
4690 		int l, t, level;
4691 		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
4692 		    "\t  avg\t comp\t%%Total\tType\n");
4693 
4694 		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
4695 			char csize[32], lsize[32], psize[32], asize[32];
4696 			char avg[32], gang[32];
4697 			const char *typename;
4698 
4699 			/* make sure nicenum has enough space */
4700 			CTASSERT(sizeof (csize) >= NN_NUMBUF_SZ);
4701 			CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
4702 			CTASSERT(sizeof (psize) >= NN_NUMBUF_SZ);
4703 			CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
4704 			CTASSERT(sizeof (avg) >= NN_NUMBUF_SZ);
4705 			CTASSERT(sizeof (gang) >= NN_NUMBUF_SZ);
4706 
4707 			if (t < DMU_OT_NUMTYPES)
4708 				typename = dmu_ot[t].ot_name;
4709 			else
4710 				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
4711 
4712 			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
4713 				(void) printf("%6s\t%5s\t%5s\t%5s"
4714 				    "\t%5s\t%5s\t%6s\t%s\n",
4715 				    "-",
4716 				    "-",
4717 				    "-",
4718 				    "-",
4719 				    "-",
4720 				    "-",
4721 				    "-",
4722 				    typename);
4723 				continue;
4724 			}
4725 
4726 			for (l = ZB_TOTAL - 1; l >= -1; l--) {
4727 				level = (l == -1 ? ZB_TOTAL : l);
4728 				zb = &zcb.zcb_type[level][t];
4729 
4730 				if (zb->zb_asize == 0)
4731 					continue;
4732 
4733 				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
4734 					continue;
4735 
4736 				if (level == 0 && zb->zb_asize ==
4737 				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
4738 					continue;
4739 
4740 				zdb_nicenum(zb->zb_count, csize,
4741 				    sizeof (csize));
4742 				zdb_nicenum(zb->zb_lsize, lsize,
4743 				    sizeof (lsize));
4744 				zdb_nicenum(zb->zb_psize, psize,
4745 				    sizeof (psize));
4746 				zdb_nicenum(zb->zb_asize, asize,
4747 				    sizeof (asize));
4748 				zdb_nicenum(zb->zb_asize / zb->zb_count, avg,
4749 				    sizeof (avg));
4750 				zdb_nicenum(zb->zb_gangs, gang, sizeof (gang));
4751 
4752 				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
4753 				    "\t%5.2f\t%6.2f\t",
4754 				    csize, lsize, psize, asize, avg,
4755 				    (double)zb->zb_lsize / zb->zb_psize,
4756 				    100.0 * zb->zb_asize / tzb->zb_asize);
4757 
4758 				if (level == ZB_TOTAL)
4759 					(void) printf("%s\n", typename);
4760 				else
4761 					(void) printf("    L%d %s\n",
4762 					    level, typename);
4763 
4764 				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
4765 					(void) printf("\t number of ganged "
4766 					    "blocks: %s\n", gang);
4767 				}
4768 
4769 				if (dump_opt['b'] >= 4) {
4770 					(void) printf("psize "
4771 					    "(in 512-byte sectors): "
4772 					    "number of blocks\n");
4773 					dump_histogram(zb->zb_psize_histogram,
4774 					    PSIZE_HISTO_SIZE, 0);
4775 				}
4776 			}
4777 		}
4778 	}
4779 
4780 	(void) printf("\n");
4781 
4782 	if (leaks)
4783 		return (2);
4784 
4785 	if (zcb.zcb_haderrors)
4786 		return (3);
4787 
4788 	return (0);
4789 }
4790 
4791 typedef struct zdb_ddt_entry {
4792 	ddt_key_t	zdde_key;
4793 	uint64_t	zdde_ref_blocks;
4794 	uint64_t	zdde_ref_lsize;
4795 	uint64_t	zdde_ref_psize;
4796 	uint64_t	zdde_ref_dsize;
4797 	avl_node_t	zdde_node;
4798 } zdb_ddt_entry_t;
4799 
4800 /* ARGSUSED */
4801 static int
4802 zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
4803     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
4804 {
4805 	avl_tree_t *t = arg;
4806 	avl_index_t where;
4807 	zdb_ddt_entry_t *zdde, zdde_search;
4808 
4809 	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
4810 		return (0);
4811 
4812 	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
4813 		(void) printf("traversing objset %llu, %llu objects, "
4814 		    "%lu blocks so far\n",
4815 		    (u_longlong_t)zb->zb_objset,
4816 		    (u_longlong_t)BP_GET_FILL(bp),
4817 		    avl_numnodes(t));
4818 	}
4819 
4820 	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
4821 	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
4822 		return (0);
4823 
4824 	ddt_key_fill(&zdde_search.zdde_key, bp);
4825 
4826 	zdde = avl_find(t, &zdde_search, &where);
4827 
4828 	if (zdde == NULL) {
4829 		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
4830 		zdde->zdde_key = zdde_search.zdde_key;
4831 		avl_insert(t, zdde, where);
4832 	}
4833 
4834 	zdde->zdde_ref_blocks += 1;
4835 	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
4836 	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
4837 	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
4838 
4839 	return (0);
4840 }
4841 
4842 static void
4843 dump_simulated_ddt(spa_t *spa)
4844 {
4845 	avl_tree_t t;
4846 	void *cookie = NULL;
4847 	zdb_ddt_entry_t *zdde;
4848 	ddt_histogram_t ddh_total;
4849 	ddt_stat_t dds_total;
4850 
4851 	bzero(&ddh_total, sizeof (ddh_total));
4852 	bzero(&dds_total, sizeof (dds_total));
4853 	avl_create(&t, ddt_entry_compare,
4854 	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
4855 
4856 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4857 
4858 	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA |
4859 	    TRAVERSE_NO_DECRYPT, zdb_ddt_add_cb, &t);
4860 
4861 	spa_config_exit(spa, SCL_CONFIG, FTAG);
4862 
4863 	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
4864 		ddt_stat_t dds;
4865 		uint64_t refcnt = zdde->zdde_ref_blocks;
4866 		ASSERT(refcnt != 0);
4867 
4868 		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
4869 		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
4870 		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
4871 		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
4872 
4873 		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
4874 		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
4875 		dds.dds_ref_psize = zdde->zdde_ref_psize;
4876 		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
4877 
4878 		ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
4879 		    &dds, 0);
4880 
4881 		umem_free(zdde, sizeof (*zdde));
4882 	}
4883 
4884 	avl_destroy(&t);
4885 
4886 	ddt_histogram_stat(&dds_total, &ddh_total);
4887 
4888 	(void) printf("Simulated DDT histogram:\n");
4889 
4890 	zpool_dump_ddt(&dds_total, &ddh_total);
4891 
4892 	dump_dedup_ratio(&dds_total);
4893 }
4894 
4895 static int
4896 verify_device_removal_feature_counts(spa_t *spa)
4897 {
4898 	uint64_t dr_feature_refcount = 0;
4899 	uint64_t oc_feature_refcount = 0;
4900 	uint64_t indirect_vdev_count = 0;
4901 	uint64_t precise_vdev_count = 0;
4902 	uint64_t obsolete_counts_object_count = 0;
4903 	uint64_t obsolete_sm_count = 0;
4904 	uint64_t obsolete_counts_count = 0;
4905 	uint64_t scip_count = 0;
4906 	uint64_t obsolete_bpobj_count = 0;
4907 	int ret = 0;
4908 
4909 	spa_condensing_indirect_phys_t *scip =
4910 	    &spa->spa_condensing_indirect_phys;
4911 	if (scip->scip_next_mapping_object != 0) {
4912 		vdev_t *vd = spa->spa_root_vdev->vdev_child[scip->scip_vdev];
4913 		ASSERT(scip->scip_prev_obsolete_sm_object != 0);
4914 		ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops);
4915 
4916 		(void) printf("Condensing indirect vdev %llu: new mapping "
4917 		    "object %llu, prev obsolete sm %llu\n",
4918 		    (u_longlong_t)scip->scip_vdev,
4919 		    (u_longlong_t)scip->scip_next_mapping_object,
4920 		    (u_longlong_t)scip->scip_prev_obsolete_sm_object);
4921 		if (scip->scip_prev_obsolete_sm_object != 0) {
4922 			space_map_t *prev_obsolete_sm = NULL;
4923 			VERIFY0(space_map_open(&prev_obsolete_sm,
4924 			    spa->spa_meta_objset,
4925 			    scip->scip_prev_obsolete_sm_object,
4926 			    0, vd->vdev_asize, 0));
4927 			dump_spacemap(spa->spa_meta_objset, prev_obsolete_sm);
4928 			(void) printf("\n");
4929 			space_map_close(prev_obsolete_sm);
4930 		}
4931 
4932 		scip_count += 2;
4933 	}
4934 
4935 	for (uint64_t i = 0; i < spa->spa_root_vdev->vdev_children; i++) {
4936 		vdev_t *vd = spa->spa_root_vdev->vdev_child[i];
4937 		vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
4938 
4939 		if (vic->vic_mapping_object != 0) {
4940 			ASSERT(vd->vdev_ops == &vdev_indirect_ops ||
4941 			    vd->vdev_removing);
4942 			indirect_vdev_count++;
4943 
4944 			if (vd->vdev_indirect_mapping->vim_havecounts) {
4945 				obsolete_counts_count++;
4946 			}
4947 		}
4948 		if (vdev_obsolete_counts_are_precise(vd)) {
4949 			ASSERT(vic->vic_mapping_object != 0);
4950 			precise_vdev_count++;
4951 		}
4952 		if (vdev_obsolete_sm_object(vd) != 0) {
4953 			ASSERT(vic->vic_mapping_object != 0);
4954 			obsolete_sm_count++;
4955 		}
4956 	}
4957 
4958 	(void) feature_get_refcount(spa,
4959 	    &spa_feature_table[SPA_FEATURE_DEVICE_REMOVAL],
4960 	    &dr_feature_refcount);
4961 	(void) feature_get_refcount(spa,
4962 	    &spa_feature_table[SPA_FEATURE_OBSOLETE_COUNTS],
4963 	    &oc_feature_refcount);
4964 
4965 	if (dr_feature_refcount != indirect_vdev_count) {
4966 		ret = 1;
4967 		(void) printf("Number of indirect vdevs (%llu) " \
4968 		    "does not match feature count (%llu)\n",
4969 		    (u_longlong_t)indirect_vdev_count,
4970 		    (u_longlong_t)dr_feature_refcount);
4971 	} else {
4972 		(void) printf("Verified device_removal feature refcount " \
4973 		    "of %llu is correct\n",
4974 		    (u_longlong_t)dr_feature_refcount);
4975 	}
4976 
4977 	if (zap_contains(spa_meta_objset(spa), DMU_POOL_DIRECTORY_OBJECT,
4978 	    DMU_POOL_OBSOLETE_BPOBJ) == 0) {
4979 		obsolete_bpobj_count++;
4980 	}
4981 
4982 
4983 	obsolete_counts_object_count = precise_vdev_count;
4984 	obsolete_counts_object_count += obsolete_sm_count;
4985 	obsolete_counts_object_count += obsolete_counts_count;
4986 	obsolete_counts_object_count += scip_count;
4987 	obsolete_counts_object_count += obsolete_bpobj_count;
4988 	obsolete_counts_object_count += remap_deadlist_count;
4989 
4990 	if (oc_feature_refcount != obsolete_counts_object_count) {
4991 		ret = 1;
4992 		(void) printf("Number of obsolete counts objects (%llu) " \
4993 		    "does not match feature count (%llu)\n",
4994 		    (u_longlong_t)obsolete_counts_object_count,
4995 		    (u_longlong_t)oc_feature_refcount);
4996 		(void) printf("pv:%llu os:%llu oc:%llu sc:%llu "
4997 		    "ob:%llu rd:%llu\n",
4998 		    (u_longlong_t)precise_vdev_count,
4999 		    (u_longlong_t)obsolete_sm_count,
5000 		    (u_longlong_t)obsolete_counts_count,
5001 		    (u_longlong_t)scip_count,
5002 		    (u_longlong_t)obsolete_bpobj_count,
5003 		    (u_longlong_t)remap_deadlist_count);
5004 	} else {
5005 		(void) printf("Verified indirect_refcount feature refcount " \
5006 		    "of %llu is correct\n",
5007 		    (u_longlong_t)oc_feature_refcount);
5008 	}
5009 	return (ret);
5010 }
5011 
5012 static void
5013 zdb_set_skip_mmp(char *target)
5014 {
5015 	spa_t *spa;
5016 
5017 	/*
5018 	 * Disable the activity check to allow examination of
5019 	 * active pools.
5020 	 */
5021 	mutex_enter(&spa_namespace_lock);
5022 	if ((spa = spa_lookup(target)) != NULL) {
5023 		spa->spa_import_flags |= ZFS_IMPORT_SKIP_MMP;
5024 	}
5025 	mutex_exit(&spa_namespace_lock);
5026 }
5027 
5028 #define	BOGUS_SUFFIX "_CHECKPOINTED_UNIVERSE"
5029 /*
5030  * Import the checkpointed state of the pool specified by the target
5031  * parameter as readonly. The function also accepts a pool config
5032  * as an optional parameter, else it attempts to infer the config by
5033  * the name of the target pool.
5034  *
5035  * Note that the checkpointed state's pool name will be the name of
5036  * the original pool with the above suffix appened to it. In addition,
5037  * if the target is not a pool name (e.g. a path to a dataset) then
5038  * the new_path parameter is populated with the updated path to
5039  * reflect the fact that we are looking into the checkpointed state.
5040  *
5041  * The function returns a newly-allocated copy of the name of the
5042  * pool containing the checkpointed state. When this copy is no
5043  * longer needed it should be freed with free(3C). Same thing
5044  * applies to the new_path parameter if allocated.
5045  */
5046 static char *
5047 import_checkpointed_state(char *target, nvlist_t *cfg, char **new_path)
5048 {
5049 	int error = 0;
5050 	char *poolname, *bogus_name;
5051 
5052 	/* If the target is not a pool, the extract the pool name */
5053 	char *path_start = strchr(target, '/');
5054 	if (path_start != NULL) {
5055 		size_t poolname_len = path_start - target;
5056 		poolname = strndup(target, poolname_len);
5057 	} else {
5058 		poolname = target;
5059 	}
5060 
5061 	if (cfg == NULL) {
5062 		zdb_set_skip_mmp(poolname);
5063 		error = spa_get_stats(poolname, &cfg, NULL, 0);
5064 		if (error != 0) {
5065 			fatal("Tried to read config of pool \"%s\" but "
5066 			    "spa_get_stats() failed with error %d\n",
5067 			    poolname, error);
5068 		}
5069 	}
5070 
5071 	(void) asprintf(&bogus_name, "%s%s", poolname, BOGUS_SUFFIX);
5072 	fnvlist_add_string(cfg, ZPOOL_CONFIG_POOL_NAME, bogus_name);
5073 
5074 	error = spa_import(bogus_name, cfg, NULL,
5075 	    ZFS_IMPORT_MISSING_LOG | ZFS_IMPORT_CHECKPOINT |
5076 	    ZFS_IMPORT_SKIP_MMP);
5077 	if (error != 0) {
5078 		fatal("Tried to import pool \"%s\" but spa_import() failed "
5079 		    "with error %d\n", bogus_name, error);
5080 	}
5081 
5082 	if (new_path != NULL && path_start != NULL)
5083 		(void) asprintf(new_path, "%s%s", bogus_name, path_start);
5084 
5085 	if (target != poolname)
5086 		free(poolname);
5087 
5088 	return (bogus_name);
5089 }
5090 
5091 typedef struct verify_checkpoint_sm_entry_cb_arg {
5092 	vdev_t *vcsec_vd;
5093 
5094 	/* the following fields are only used for printing progress */
5095 	uint64_t vcsec_entryid;
5096 	uint64_t vcsec_num_entries;
5097 } verify_checkpoint_sm_entry_cb_arg_t;
5098 
5099 #define	ENTRIES_PER_PROGRESS_UPDATE 10000
5100 
5101 static int
5102 verify_checkpoint_sm_entry_cb(space_map_entry_t *sme, void *arg)
5103 {
5104 	verify_checkpoint_sm_entry_cb_arg_t *vcsec = arg;
5105 	vdev_t *vd = vcsec->vcsec_vd;
5106 	metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
5107 	uint64_t end = sme->sme_offset + sme->sme_run;
5108 
5109 	ASSERT(sme->sme_type == SM_FREE);
5110 
5111 	if ((vcsec->vcsec_entryid % ENTRIES_PER_PROGRESS_UPDATE) == 0) {
5112 		(void) fprintf(stderr,
5113 		    "\rverifying vdev %llu, space map entry %llu of %llu ...",
5114 		    (longlong_t)vd->vdev_id,
5115 		    (longlong_t)vcsec->vcsec_entryid,
5116 		    (longlong_t)vcsec->vcsec_num_entries);
5117 	}
5118 	vcsec->vcsec_entryid++;
5119 
5120 	/*
5121 	 * See comment in checkpoint_sm_exclude_entry_cb()
5122 	 */
5123 	VERIFY3U(sme->sme_offset, >=, ms->ms_start);
5124 	VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
5125 
5126 	/*
5127 	 * The entries in the vdev_checkpoint_sm should be marked as
5128 	 * allocated in the checkpointed state of the pool, therefore
5129 	 * their respective ms_allocateable trees should not contain them.
5130 	 */
5131 	mutex_enter(&ms->ms_lock);
5132 	range_tree_verify_not_present(ms->ms_allocatable,
5133 	    sme->sme_offset, sme->sme_run);
5134 	mutex_exit(&ms->ms_lock);
5135 
5136 	return (0);
5137 }
5138 
5139 /*
5140  * Verify that all segments in the vdev_checkpoint_sm are allocated
5141  * according to the checkpoint's ms_sm (i.e. are not in the checkpoint's
5142  * ms_allocatable).
5143  *
5144  * Do so by comparing the checkpoint space maps (vdev_checkpoint_sm) of
5145  * each vdev in the current state of the pool to the metaslab space maps
5146  * (ms_sm) of the checkpointed state of the pool.
5147  *
5148  * Note that the function changes the state of the ms_allocatable
5149  * trees of the current spa_t. The entries of these ms_allocatable
5150  * trees are cleared out and then repopulated from with the free
5151  * entries of their respective ms_sm space maps.
5152  */
5153 static void
5154 verify_checkpoint_vdev_spacemaps(spa_t *checkpoint, spa_t *current)
5155 {
5156 	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
5157 	vdev_t *current_rvd = current->spa_root_vdev;
5158 
5159 	load_concrete_ms_allocatable_trees(checkpoint, SM_FREE);
5160 
5161 	for (uint64_t c = 0; c < ckpoint_rvd->vdev_children; c++) {
5162 		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[c];
5163 		vdev_t *current_vd = current_rvd->vdev_child[c];
5164 
5165 		space_map_t *checkpoint_sm = NULL;
5166 		uint64_t checkpoint_sm_obj;
5167 
5168 		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
5169 			/*
5170 			 * Since we don't allow device removal in a pool
5171 			 * that has a checkpoint, we expect that all removed
5172 			 * vdevs were removed from the pool before the
5173 			 * checkpoint.
5174 			 */
5175 			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
5176 			continue;
5177 		}
5178 
5179 		/*
5180 		 * If the checkpoint space map doesn't exist, then nothing
5181 		 * here is checkpointed so there's nothing to verify.
5182 		 */
5183 		if (current_vd->vdev_top_zap == 0 ||
5184 		    zap_contains(spa_meta_objset(current),
5185 		    current_vd->vdev_top_zap,
5186 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
5187 			continue;
5188 
5189 		VERIFY0(zap_lookup(spa_meta_objset(current),
5190 		    current_vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
5191 		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
5192 
5193 		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(current),
5194 		    checkpoint_sm_obj, 0, current_vd->vdev_asize,
5195 		    current_vd->vdev_ashift));
5196 
5197 		verify_checkpoint_sm_entry_cb_arg_t vcsec;
5198 		vcsec.vcsec_vd = ckpoint_vd;
5199 		vcsec.vcsec_entryid = 0;
5200 		vcsec.vcsec_num_entries =
5201 		    space_map_length(checkpoint_sm) / sizeof (uint64_t);
5202 		VERIFY0(space_map_iterate(checkpoint_sm,
5203 		    space_map_length(checkpoint_sm),
5204 		    verify_checkpoint_sm_entry_cb, &vcsec));
5205 		dump_spacemap(current->spa_meta_objset, checkpoint_sm);
5206 		space_map_close(checkpoint_sm);
5207 	}
5208 
5209 	/*
5210 	 * If we've added vdevs since we took the checkpoint, ensure
5211 	 * that their checkpoint space maps are empty.
5212 	 */
5213 	if (ckpoint_rvd->vdev_children < current_rvd->vdev_children) {
5214 		for (uint64_t c = ckpoint_rvd->vdev_children;
5215 		    c < current_rvd->vdev_children; c++) {
5216 			vdev_t *current_vd = current_rvd->vdev_child[c];
5217 			ASSERT3P(current_vd->vdev_checkpoint_sm, ==, NULL);
5218 		}
5219 	}
5220 
5221 	/* for cleaner progress output */
5222 	(void) fprintf(stderr, "\n");
5223 }
5224 
5225 /*
5226  * Verifies that all space that's allocated in the checkpoint is
5227  * still allocated in the current version, by checking that everything
5228  * in checkpoint's ms_allocatable (which is actually allocated, not
5229  * allocatable/free) is not present in current's ms_allocatable.
5230  *
5231  * Note that the function changes the state of the ms_allocatable
5232  * trees of both spas when called. The entries of all ms_allocatable
5233  * trees are cleared out and then repopulated from their respective
5234  * ms_sm space maps. In the checkpointed state we load the allocated
5235  * entries, and in the current state we load the free entries.
5236  */
5237 static void
5238 verify_checkpoint_ms_spacemaps(spa_t *checkpoint, spa_t *current)
5239 {
5240 	vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
5241 	vdev_t *current_rvd = current->spa_root_vdev;
5242 
5243 	load_concrete_ms_allocatable_trees(checkpoint, SM_ALLOC);
5244 	load_concrete_ms_allocatable_trees(current, SM_FREE);
5245 
5246 	for (uint64_t i = 0; i < ckpoint_rvd->vdev_children; i++) {
5247 		vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[i];
5248 		vdev_t *current_vd = current_rvd->vdev_child[i];
5249 
5250 		if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
5251 			/*
5252 			 * See comment in verify_checkpoint_vdev_spacemaps()
5253 			 */
5254 			ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
5255 			continue;
5256 		}
5257 
5258 		for (uint64_t m = 0; m < ckpoint_vd->vdev_ms_count; m++) {
5259 			metaslab_t *ckpoint_msp = ckpoint_vd->vdev_ms[m];
5260 			metaslab_t *current_msp = current_vd->vdev_ms[m];
5261 
5262 			(void) fprintf(stderr,
5263 			    "\rverifying vdev %llu of %llu, "
5264 			    "metaslab %llu of %llu ...",
5265 			    (longlong_t)current_vd->vdev_id,
5266 			    (longlong_t)current_rvd->vdev_children,
5267 			    (longlong_t)current_vd->vdev_ms[m]->ms_id,
5268 			    (longlong_t)current_vd->vdev_ms_count);
5269 
5270 			/*
5271 			 * We walk through the ms_allocatable trees that
5272 			 * are loaded with the allocated blocks from the
5273 			 * ms_sm spacemaps of the checkpoint. For each
5274 			 * one of these ranges we ensure that none of them
5275 			 * exists in the ms_allocatable trees of the
5276 			 * current state which are loaded with the ranges
5277 			 * that are currently free.
5278 			 *
5279 			 * This way we ensure that none of the blocks that
5280 			 * are part of the checkpoint were freed by mistake.
5281 			 */
5282 			range_tree_walk(ckpoint_msp->ms_allocatable,
5283 			    (range_tree_func_t *)range_tree_verify_not_present,
5284 			    current_msp->ms_allocatable);
5285 		}
5286 	}
5287 
5288 	/* for cleaner progress output */
5289 	(void) fprintf(stderr, "\n");
5290 }
5291 
5292 static void
5293 verify_checkpoint_blocks(spa_t *spa)
5294 {
5295 	ASSERT(!dump_opt['L']);
5296 
5297 	spa_t *checkpoint_spa;
5298 	char *checkpoint_pool;
5299 	nvlist_t *config = NULL;
5300 	int error = 0;
5301 
5302 	/*
5303 	 * We import the checkpointed state of the pool (under a different
5304 	 * name) so we can do verification on it against the current state
5305 	 * of the pool.
5306 	 */
5307 	checkpoint_pool = import_checkpointed_state(spa->spa_name, config,
5308 	    NULL);
5309 	ASSERT(strcmp(spa->spa_name, checkpoint_pool) != 0);
5310 
5311 	error = spa_open(checkpoint_pool, &checkpoint_spa, FTAG);
5312 	if (error != 0) {
5313 		fatal("Tried to open pool \"%s\" but spa_open() failed with "
5314 		    "error %d\n", checkpoint_pool, error);
5315 	}
5316 
5317 	/*
5318 	 * Ensure that ranges in the checkpoint space maps of each vdev
5319 	 * are allocated according to the checkpointed state's metaslab
5320 	 * space maps.
5321 	 */
5322 	verify_checkpoint_vdev_spacemaps(checkpoint_spa, spa);
5323 
5324 	/*
5325 	 * Ensure that allocated ranges in the checkpoint's metaslab
5326 	 * space maps remain allocated in the metaslab space maps of
5327 	 * the current state.
5328 	 */
5329 	verify_checkpoint_ms_spacemaps(checkpoint_spa, spa);
5330 
5331 	/*
5332 	 * Once we are done, we get rid of the checkpointed state.
5333 	 */
5334 	spa_close(checkpoint_spa, FTAG);
5335 	free(checkpoint_pool);
5336 }
5337 
5338 static void
5339 dump_leftover_checkpoint_blocks(spa_t *spa)
5340 {
5341 	vdev_t *rvd = spa->spa_root_vdev;
5342 
5343 	for (uint64_t i = 0; i < rvd->vdev_children; i++) {
5344 		vdev_t *vd = rvd->vdev_child[i];
5345 
5346 		space_map_t *checkpoint_sm = NULL;
5347 		uint64_t checkpoint_sm_obj;
5348 
5349 		if (vd->vdev_top_zap == 0)
5350 			continue;
5351 
5352 		if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
5353 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
5354 			continue;
5355 
5356 		VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
5357 		    VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
5358 		    sizeof (uint64_t), 1, &checkpoint_sm_obj));
5359 
5360 		VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
5361 		    checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
5362 		dump_spacemap(spa->spa_meta_objset, checkpoint_sm);
5363 		space_map_close(checkpoint_sm);
5364 	}
5365 }
5366 
5367 static int
5368 verify_checkpoint(spa_t *spa)
5369 {
5370 	uberblock_t checkpoint;
5371 	int error;
5372 
5373 	if (!spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT))
5374 		return (0);
5375 
5376 	error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
5377 	    DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t),
5378 	    sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint);
5379 
5380 	if (error == ENOENT && !dump_opt['L']) {
5381 		/*
5382 		 * If the feature is active but the uberblock is missing
5383 		 * then we must be in the middle of discarding the
5384 		 * checkpoint.
5385 		 */
5386 		(void) printf("\nPartially discarded checkpoint "
5387 		    "state found:\n");
5388 		dump_leftover_checkpoint_blocks(spa);
5389 		return (0);
5390 	} else if (error != 0) {
5391 		(void) printf("lookup error %d when looking for "
5392 		    "checkpointed uberblock in MOS\n", error);
5393 		return (error);
5394 	}
5395 	dump_uberblock(&checkpoint, "\nCheckpointed uberblock found:\n", "\n");
5396 
5397 	if (checkpoint.ub_checkpoint_txg == 0) {
5398 		(void) printf("\nub_checkpoint_txg not set in checkpointed "
5399 		    "uberblock\n");
5400 		error = 3;
5401 	}
5402 
5403 	if (error == 0 && !dump_opt['L'])
5404 		verify_checkpoint_blocks(spa);
5405 
5406 	return (error);
5407 }
5408 
5409 /* ARGSUSED */
5410 static void
5411 mos_leaks_cb(void *arg, uint64_t start, uint64_t size)
5412 {
5413 	for (uint64_t i = start; i < size; i++) {
5414 		(void) printf("MOS object %llu referenced but not allocated\n",
5415 		    (u_longlong_t)i);
5416 	}
5417 }
5418 
5419 static range_tree_t *mos_refd_objs;
5420 
5421 static void
5422 mos_obj_refd(uint64_t obj)
5423 {
5424 	if (obj != 0 && mos_refd_objs != NULL)
5425 		range_tree_add(mos_refd_objs, obj, 1);
5426 }
5427 
5428 static void
5429 mos_leak_vdev_top_zap(vdev_t *vd)
5430 {
5431 	uint64_t ms_flush_data_obj;
5432 
5433 	int error = zap_lookup(spa_meta_objset(vd->vdev_spa),
5434 	    vd->vdev_top_zap, VDEV_TOP_ZAP_MS_UNFLUSHED_PHYS_TXGS,
5435 	    sizeof (ms_flush_data_obj), 1, &ms_flush_data_obj);
5436 	if (error == ENOENT)
5437 		return;
5438 	ASSERT0(error);
5439 
5440 	mos_obj_refd(ms_flush_data_obj);
5441 }
5442 
5443 static void
5444 mos_leak_vdev(vdev_t *vd)
5445 {
5446 	mos_obj_refd(vd->vdev_dtl_object);
5447 	mos_obj_refd(vd->vdev_ms_array);
5448 	mos_obj_refd(vd->vdev_indirect_config.vic_births_object);
5449 	mos_obj_refd(vd->vdev_indirect_config.vic_mapping_object);
5450 	mos_obj_refd(vd->vdev_leaf_zap);
5451 	if (vd->vdev_checkpoint_sm != NULL)
5452 		mos_obj_refd(vd->vdev_checkpoint_sm->sm_object);
5453 	if (vd->vdev_indirect_mapping != NULL) {
5454 		mos_obj_refd(vd->vdev_indirect_mapping->
5455 		    vim_phys->vimp_counts_object);
5456 	}
5457 	if (vd->vdev_obsolete_sm != NULL)
5458 		mos_obj_refd(vd->vdev_obsolete_sm->sm_object);
5459 
5460 	for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
5461 		metaslab_t *ms = vd->vdev_ms[m];
5462 		mos_obj_refd(space_map_object(ms->ms_sm));
5463 	}
5464 
5465 	if (vd->vdev_top_zap != 0) {
5466 		mos_obj_refd(vd->vdev_top_zap);
5467 		mos_leak_vdev_top_zap(vd);
5468 	}
5469 
5470 	for (uint64_t c = 0; c < vd->vdev_children; c++) {
5471 		mos_leak_vdev(vd->vdev_child[c]);
5472 	}
5473 }
5474 
5475 static void
5476 mos_leak_log_spacemaps(spa_t *spa)
5477 {
5478 	uint64_t spacemap_zap;
5479 
5480 	int error = zap_lookup(spa_meta_objset(spa),
5481 	    DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_LOG_SPACEMAP_ZAP,
5482 	    sizeof (spacemap_zap), 1, &spacemap_zap);
5483 	if (error == ENOENT)
5484 		return;
5485 	ASSERT0(error);
5486 
5487 	mos_obj_refd(spacemap_zap);
5488 	for (spa_log_sm_t *sls = avl_first(&spa->spa_sm_logs_by_txg);
5489 	    sls; sls = AVL_NEXT(&spa->spa_sm_logs_by_txg, sls))
5490 		mos_obj_refd(sls->sls_sm_obj);
5491 }
5492 
5493 static int
5494 dump_mos_leaks(spa_t *spa)
5495 {
5496 	int rv = 0;
5497 	objset_t *mos = spa->spa_meta_objset;
5498 	dsl_pool_t *dp = spa->spa_dsl_pool;
5499 
5500 	/* Visit and mark all referenced objects in the MOS */
5501 
5502 	mos_obj_refd(DMU_POOL_DIRECTORY_OBJECT);
5503 	mos_obj_refd(spa->spa_pool_props_object);
5504 	mos_obj_refd(spa->spa_config_object);
5505 	mos_obj_refd(spa->spa_ddt_stat_object);
5506 	mos_obj_refd(spa->spa_feat_desc_obj);
5507 	mos_obj_refd(spa->spa_feat_enabled_txg_obj);
5508 	mos_obj_refd(spa->spa_feat_for_read_obj);
5509 	mos_obj_refd(spa->spa_feat_for_write_obj);
5510 	mos_obj_refd(spa->spa_history);
5511 	mos_obj_refd(spa->spa_errlog_last);
5512 	mos_obj_refd(spa->spa_errlog_scrub);
5513 	mos_obj_refd(spa->spa_all_vdev_zaps);
5514 	mos_obj_refd(spa->spa_dsl_pool->dp_bptree_obj);
5515 	mos_obj_refd(spa->spa_dsl_pool->dp_tmp_userrefs_obj);
5516 	mos_obj_refd(spa->spa_dsl_pool->dp_scan->scn_phys.scn_queue_obj);
5517 	bpobj_count_refd(&spa->spa_deferred_bpobj);
5518 	mos_obj_refd(dp->dp_empty_bpobj);
5519 	bpobj_count_refd(&dp->dp_obsolete_bpobj);
5520 	bpobj_count_refd(&dp->dp_free_bpobj);
5521 	mos_obj_refd(spa->spa_l2cache.sav_object);
5522 	mos_obj_refd(spa->spa_spares.sav_object);
5523 
5524 	if (spa->spa_syncing_log_sm != NULL)
5525 		mos_obj_refd(spa->spa_syncing_log_sm->sm_object);
5526 	mos_leak_log_spacemaps(spa);
5527 
5528 	mos_obj_refd(spa->spa_condensing_indirect_phys.
5529 	    scip_next_mapping_object);
5530 	mos_obj_refd(spa->spa_condensing_indirect_phys.
5531 	    scip_prev_obsolete_sm_object);
5532 	if (spa->spa_condensing_indirect_phys.scip_next_mapping_object != 0) {
5533 		vdev_indirect_mapping_t *vim =
5534 		    vdev_indirect_mapping_open(mos,
5535 		    spa->spa_condensing_indirect_phys.scip_next_mapping_object);
5536 		mos_obj_refd(vim->vim_phys->vimp_counts_object);
5537 		vdev_indirect_mapping_close(vim);
5538 	}
5539 
5540 	if (dp->dp_origin_snap != NULL) {
5541 		dsl_dataset_t *ds;
5542 
5543 		dsl_pool_config_enter(dp, FTAG);
5544 		VERIFY0(dsl_dataset_hold_obj(dp,
5545 		    dsl_dataset_phys(dp->dp_origin_snap)->ds_next_snap_obj,
5546 		    FTAG, &ds));
5547 		count_ds_mos_objects(ds);
5548 		dump_deadlist(&ds->ds_deadlist);
5549 		dsl_dataset_rele(ds, FTAG);
5550 		dsl_pool_config_exit(dp, FTAG);
5551 
5552 		count_ds_mos_objects(dp->dp_origin_snap);
5553 		dump_deadlist(&dp->dp_origin_snap->ds_deadlist);
5554 	}
5555 	count_dir_mos_objects(dp->dp_mos_dir);
5556 	if (dp->dp_free_dir != NULL)
5557 		count_dir_mos_objects(dp->dp_free_dir);
5558 	if (dp->dp_leak_dir != NULL)
5559 		count_dir_mos_objects(dp->dp_leak_dir);
5560 
5561 	mos_leak_vdev(spa->spa_root_vdev);
5562 
5563 	for (uint64_t class = 0; class < DDT_CLASSES; class++) {
5564 		for (uint64_t type = 0; type < DDT_TYPES; type++) {
5565 			for (uint64_t cksum = 0;
5566 			    cksum < ZIO_CHECKSUM_FUNCTIONS; cksum++) {
5567 				ddt_t *ddt = spa->spa_ddt[cksum];
5568 				mos_obj_refd(ddt->ddt_object[type][class]);
5569 			}
5570 		}
5571 	}
5572 
5573 	/*
5574 	 * Visit all allocated objects and make sure they are referenced.
5575 	 */
5576 	uint64_t object = 0;
5577 	while (dmu_object_next(mos, &object, B_FALSE, 0) == 0) {
5578 		if (range_tree_contains(mos_refd_objs, object, 1)) {
5579 			range_tree_remove(mos_refd_objs, object, 1);
5580 		} else {
5581 			dmu_object_info_t doi;
5582 			const char *name;
5583 			dmu_object_info(mos, object, &doi);
5584 			if (doi.doi_type & DMU_OT_NEWTYPE) {
5585 				dmu_object_byteswap_t bswap =
5586 				    DMU_OT_BYTESWAP(doi.doi_type);
5587 				name = dmu_ot_byteswap[bswap].ob_name;
5588 			} else {
5589 				name = dmu_ot[doi.doi_type].ot_name;
5590 			}
5591 
5592 			(void) printf("MOS object %llu (%s) leaked\n",
5593 			    (u_longlong_t)object, name);
5594 			rv = 2;
5595 		}
5596 	}
5597 	(void) range_tree_walk(mos_refd_objs, mos_leaks_cb, NULL);
5598 	if (!range_tree_is_empty(mos_refd_objs))
5599 		rv = 2;
5600 	range_tree_vacate(mos_refd_objs, NULL, NULL);
5601 	range_tree_destroy(mos_refd_objs);
5602 	return (rv);
5603 }
5604 
5605 typedef struct log_sm_obsolete_stats_arg {
5606 	uint64_t lsos_current_txg;
5607 
5608 	uint64_t lsos_total_entries;
5609 	uint64_t lsos_valid_entries;
5610 
5611 	uint64_t lsos_sm_entries;
5612 	uint64_t lsos_valid_sm_entries;
5613 } log_sm_obsolete_stats_arg_t;
5614 
5615 static int
5616 log_spacemap_obsolete_stats_cb(spa_t *spa, space_map_entry_t *sme,
5617     uint64_t txg, void *arg)
5618 {
5619 	log_sm_obsolete_stats_arg_t *lsos = arg;
5620 	uint64_t offset = sme->sme_offset;
5621 	uint64_t vdev_id = sme->sme_vdev;
5622 
5623 	if (lsos->lsos_current_txg == 0) {
5624 		/* this is the first log */
5625 		lsos->lsos_current_txg = txg;
5626 	} else if (lsos->lsos_current_txg < txg) {
5627 		/* we just changed log - print stats and reset */
5628 		(void) printf("%-8llu valid entries out of %-8llu - txg %llu\n",
5629 		    (u_longlong_t)lsos->lsos_valid_sm_entries,
5630 		    (u_longlong_t)lsos->lsos_sm_entries,
5631 		    (u_longlong_t)lsos->lsos_current_txg);
5632 		lsos->lsos_valid_sm_entries = 0;
5633 		lsos->lsos_sm_entries = 0;
5634 		lsos->lsos_current_txg = txg;
5635 	}
5636 	ASSERT3U(lsos->lsos_current_txg, ==, txg);
5637 
5638 	lsos->lsos_sm_entries++;
5639 	lsos->lsos_total_entries++;
5640 
5641 	vdev_t *vd = vdev_lookup_top(spa, vdev_id);
5642 	if (!vdev_is_concrete(vd))
5643 		return (0);
5644 
5645 	metaslab_t *ms = vd->vdev_ms[offset >> vd->vdev_ms_shift];
5646 	ASSERT(sme->sme_type == SM_ALLOC || sme->sme_type == SM_FREE);
5647 
5648 	if (txg < metaslab_unflushed_txg(ms))
5649 		return (0);
5650 	lsos->lsos_valid_sm_entries++;
5651 	lsos->lsos_valid_entries++;
5652 	return (0);
5653 }
5654 
5655 static void
5656 dump_log_spacemap_obsolete_stats(spa_t *spa)
5657 {
5658 	if (!spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP))
5659 		return;
5660 
5661 	log_sm_obsolete_stats_arg_t lsos;
5662 	bzero(&lsos, sizeof (lsos));
5663 
5664 	(void) printf("Log Space Map Obsolete Entry Statistics:\n");
5665 
5666 	iterate_through_spacemap_logs(spa,
5667 	    log_spacemap_obsolete_stats_cb, &lsos);
5668 
5669 	/* print stats for latest log */
5670 	(void) printf("%-8llu valid entries out of %-8llu - txg %llu\n",
5671 	    (u_longlong_t)lsos.lsos_valid_sm_entries,
5672 	    (u_longlong_t)lsos.lsos_sm_entries,
5673 	    (u_longlong_t)lsos.lsos_current_txg);
5674 
5675 	(void) printf("%-8llu valid entries out of %-8llu - total\n\n",
5676 	    (u_longlong_t)lsos.lsos_valid_entries,
5677 	    (u_longlong_t)lsos.lsos_total_entries);
5678 }
5679 
5680 static void
5681 dump_zpool(spa_t *spa)
5682 {
5683 	dsl_pool_t *dp = spa_get_dsl(spa);
5684 	int rc = 0;
5685 
5686 	if (dump_opt['S']) {
5687 		dump_simulated_ddt(spa);
5688 		return;
5689 	}
5690 
5691 	if (!dump_opt['e'] && dump_opt['C'] > 1) {
5692 		(void) printf("\nCached configuration:\n");
5693 		dump_nvlist(spa->spa_config, 8);
5694 	}
5695 
5696 	if (dump_opt['C'])
5697 		dump_config(spa);
5698 
5699 	if (dump_opt['u'])
5700 		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
5701 
5702 	if (dump_opt['D'])
5703 		dump_all_ddts(spa);
5704 
5705 	if (dump_opt['d'] > 2 || dump_opt['m'])
5706 		dump_metaslabs(spa);
5707 	if (dump_opt['M'])
5708 		dump_metaslab_groups(spa);
5709 	if (dump_opt['d'] > 2 || dump_opt['m']) {
5710 		dump_log_spacemaps(spa);
5711 		dump_log_spacemap_obsolete_stats(spa);
5712 	}
5713 
5714 	if (dump_opt['d'] || dump_opt['i']) {
5715 		mos_refd_objs = range_tree_create(NULL, RANGE_SEG64, NULL, 0,
5716 		    0);
5717 		dump_dir(dp->dp_meta_objset);
5718 
5719 		if (dump_opt['d'] >= 3) {
5720 			dsl_pool_t *dp = spa->spa_dsl_pool;
5721 			dump_full_bpobj(&spa->spa_deferred_bpobj,
5722 			    "Deferred frees", 0);
5723 			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
5724 				dump_full_bpobj(&dp->dp_free_bpobj,
5725 				    "Pool snapshot frees", 0);
5726 			}
5727 			if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
5728 				ASSERT(spa_feature_is_enabled(spa,
5729 				    SPA_FEATURE_DEVICE_REMOVAL));
5730 				dump_full_bpobj(&dp->dp_obsolete_bpobj,
5731 				    "Pool obsolete blocks", 0);
5732 			}
5733 
5734 			if (spa_feature_is_active(spa,
5735 			    SPA_FEATURE_ASYNC_DESTROY)) {
5736 				dump_bptree(spa->spa_meta_objset,
5737 				    dp->dp_bptree_obj,
5738 				    "Pool dataset frees");
5739 			}
5740 			dump_dtl(spa->spa_root_vdev, 0);
5741 		}
5742 		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
5743 		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
5744 
5745 		if (rc == 0 && !dump_opt['L'])
5746 			rc = dump_mos_leaks(spa);
5747 
5748 		for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
5749 			uint64_t refcount;
5750 
5751 			if (!(spa_feature_table[f].fi_flags &
5752 			    ZFEATURE_FLAG_PER_DATASET) ||
5753 			    !spa_feature_is_enabled(spa, f)) {
5754 				ASSERT0(dataset_feature_count[f]);
5755 				continue;
5756 			}
5757 			(void) feature_get_refcount(spa,
5758 			    &spa_feature_table[f], &refcount);
5759 			if (dataset_feature_count[f] != refcount) {
5760 				(void) printf("%s feature refcount mismatch: "
5761 				    "%lld datasets != %lld refcount\n",
5762 				    spa_feature_table[f].fi_uname,
5763 				    (longlong_t)dataset_feature_count[f],
5764 				    (longlong_t)refcount);
5765 				rc = 2;
5766 			} else {
5767 				(void) printf("Verified %s feature refcount "
5768 				    "of %llu is correct\n",
5769 				    spa_feature_table[f].fi_uname,
5770 				    (longlong_t)refcount);
5771 			}
5772 		}
5773 
5774 		if (rc == 0)
5775 			rc = verify_device_removal_feature_counts(spa);
5776 	}
5777 
5778 	if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
5779 		rc = dump_block_stats(spa);
5780 
5781 	if (rc == 0)
5782 		rc = verify_spacemap_refcounts(spa);
5783 
5784 	if (dump_opt['s'])
5785 		show_pool_stats(spa);
5786 
5787 	if (dump_opt['h'])
5788 		dump_history(spa);
5789 
5790 	if (rc == 0)
5791 		rc = verify_checkpoint(spa);
5792 
5793 	if (rc != 0) {
5794 		dump_debug_buffer();
5795 		exit(rc);
5796 	}
5797 }
5798 
5799 #define	ZDB_FLAG_CHECKSUM	0x0001
5800 #define	ZDB_FLAG_DECOMPRESS	0x0002
5801 #define	ZDB_FLAG_BSWAP		0x0004
5802 #define	ZDB_FLAG_GBH		0x0008
5803 #define	ZDB_FLAG_INDIRECT	0x0010
5804 #define	ZDB_FLAG_PHYS		0x0020
5805 #define	ZDB_FLAG_RAW		0x0040
5806 #define	ZDB_FLAG_PRINT_BLKPTR	0x0080
5807 
5808 static int flagbits[256];
5809 
5810 static void
5811 zdb_print_blkptr(blkptr_t *bp, int flags)
5812 {
5813 	char blkbuf[BP_SPRINTF_LEN];
5814 
5815 	if (flags & ZDB_FLAG_BSWAP)
5816 		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
5817 
5818 	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
5819 	(void) printf("%s\n", blkbuf);
5820 }
5821 
5822 static void
5823 zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
5824 {
5825 	int i;
5826 
5827 	for (i = 0; i < nbps; i++)
5828 		zdb_print_blkptr(&bp[i], flags);
5829 }
5830 
5831 static void
5832 zdb_dump_gbh(void *buf, int flags)
5833 {
5834 	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
5835 }
5836 
5837 static void
5838 zdb_dump_block_raw(void *buf, uint64_t size, int flags)
5839 {
5840 	if (flags & ZDB_FLAG_BSWAP)
5841 		byteswap_uint64_array(buf, size);
5842 	(void) write(1, buf, size);
5843 }
5844 
5845 static void
5846 zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
5847 {
5848 	uint64_t *d = (uint64_t *)buf;
5849 	unsigned nwords = size / sizeof (uint64_t);
5850 	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
5851 	unsigned i, j;
5852 	const char *hdr;
5853 	char *c;
5854 
5855 
5856 	if (do_bswap)
5857 		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
5858 	else
5859 		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
5860 
5861 	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
5862 
5863 	for (i = 0; i < nwords; i += 2) {
5864 		(void) printf("%06llx:  %016llx  %016llx  ",
5865 		    (u_longlong_t)(i * sizeof (uint64_t)),
5866 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
5867 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
5868 
5869 		c = (char *)&d[i];
5870 		for (j = 0; j < 2 * sizeof (uint64_t); j++)
5871 			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
5872 		(void) printf("\n");
5873 	}
5874 }
5875 
5876 /*
5877  * There are two acceptable formats:
5878  *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
5879  *	child[.child]*    - For example: 0.1.1
5880  *
5881  * The second form can be used to specify arbitrary vdevs anywhere
5882  * in the heirarchy.  For example, in a pool with a mirror of
5883  * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
5884  */
5885 static vdev_t *
5886 zdb_vdev_lookup(vdev_t *vdev, const char *path)
5887 {
5888 	char *s, *p, *q;
5889 	unsigned i;
5890 
5891 	if (vdev == NULL)
5892 		return (NULL);
5893 
5894 	/* First, assume the x.x.x.x format */
5895 	i = strtoul(path, &s, 10);
5896 	if (s == path || (s && *s != '.' && *s != '\0'))
5897 		goto name;
5898 	if (i >= vdev->vdev_children)
5899 		return (NULL);
5900 
5901 	vdev = vdev->vdev_child[i];
5902 	if (*s == '\0')
5903 		return (vdev);
5904 	return (zdb_vdev_lookup(vdev, s+1));
5905 
5906 name:
5907 	for (i = 0; i < vdev->vdev_children; i++) {
5908 		vdev_t *vc = vdev->vdev_child[i];
5909 
5910 		if (vc->vdev_path == NULL) {
5911 			vc = zdb_vdev_lookup(vc, path);
5912 			if (vc == NULL)
5913 				continue;
5914 			else
5915 				return (vc);
5916 		}
5917 
5918 		p = strrchr(vc->vdev_path, '/');
5919 		p = p ? p + 1 : vc->vdev_path;
5920 		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
5921 
5922 		if (strcmp(vc->vdev_path, path) == 0)
5923 			return (vc);
5924 		if (strcmp(p, path) == 0)
5925 			return (vc);
5926 		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
5927 			return (vc);
5928 	}
5929 
5930 	return (NULL);
5931 }
5932 
5933 /* ARGSUSED */
5934 static int
5935 random_get_pseudo_bytes_cb(void *buf, size_t len, void *unused)
5936 {
5937 	return (random_get_pseudo_bytes(buf, len));
5938 }
5939 
5940 /*
5941  * Read a block from a pool and print it out.  The syntax of the
5942  * block descriptor is:
5943  *
5944  *	pool:vdev_specifier:offset:size[:flags]
5945  *
5946  *	pool           - The name of the pool you wish to read from
5947  *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
5948  *	offset         - offset, in hex, in bytes
5949  *	size           - Amount of data to read, in hex, in bytes
5950  *	flags          - A string of characters specifying options
5951  *		 b: Decode a blkptr at given offset within block
5952  *		*c: Calculate and display checksums
5953  *		 d: Decompress data before dumping
5954  *		 e: Byteswap data before dumping
5955  *		 g: Display data as a gang block header
5956  *		 i: Display as an indirect block
5957  *		 p: Do I/O to physical offset
5958  *		 r: Dump raw data to stdout
5959  *
5960  *              * = not yet implemented
5961  */
5962 static void
5963 zdb_read_block(char *thing, spa_t *spa)
5964 {
5965 	blkptr_t blk, *bp = &blk;
5966 	dva_t *dva = bp->blk_dva;
5967 	int flags = 0;
5968 	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
5969 	zio_t *zio;
5970 	vdev_t *vd;
5971 	abd_t *pabd;
5972 	void *lbuf, *buf;
5973 	const char *s, *vdev;
5974 	char *p, *dup, *flagstr;
5975 	int i, error;
5976 
5977 	dup = strdup(thing);
5978 	s = strtok(dup, ":");
5979 	vdev = s ? s : "";
5980 	s = strtok(NULL, ":");
5981 	offset = strtoull(s ? s : "", NULL, 16);
5982 	s = strtok(NULL, ":");
5983 	size = strtoull(s ? s : "", NULL, 16);
5984 	s = strtok(NULL, ":");
5985 	if (s)
5986 		flagstr = strdup(s);
5987 	else
5988 		flagstr = strdup("");
5989 
5990 	s = NULL;
5991 	if (size == 0)
5992 		s = "size must not be zero";
5993 	if (!IS_P2ALIGNED(size, DEV_BSIZE))
5994 		s = "size must be a multiple of sector size";
5995 	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
5996 		s = "offset must be a multiple of sector size";
5997 	if (s) {
5998 		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
5999 		free(dup);
6000 		return;
6001 	}
6002 
6003 	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
6004 		for (i = 0; flagstr[i]; i++) {
6005 			int bit = flagbits[(uchar_t)flagstr[i]];
6006 
6007 			if (bit == 0) {
6008 				(void) printf("***Invalid flag: %c\n",
6009 				    flagstr[i]);
6010 				continue;
6011 			}
6012 			flags |= bit;
6013 
6014 			/* If it's not something with an argument, keep going */
6015 			if ((bit & (ZDB_FLAG_CHECKSUM |
6016 			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
6017 				continue;
6018 
6019 			p = &flagstr[i + 1];
6020 			if (bit == ZDB_FLAG_PRINT_BLKPTR)
6021 				blkptr_offset = strtoull(p, &p, 16);
6022 			if (*p != ':' && *p != '\0') {
6023 				(void) printf("***Invalid flag arg: '%s'\n", s);
6024 				free(dup);
6025 				return;
6026 			}
6027 		}
6028 	}
6029 	free(flagstr);
6030 
6031 	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
6032 	if (vd == NULL) {
6033 		(void) printf("***Invalid vdev: %s\n", vdev);
6034 		free(dup);
6035 		return;
6036 	} else {
6037 		if (vd->vdev_path)
6038 			(void) fprintf(stderr, "Found vdev: %s\n",
6039 			    vd->vdev_path);
6040 		else
6041 			(void) fprintf(stderr, "Found vdev type: %s\n",
6042 			    vd->vdev_ops->vdev_op_type);
6043 	}
6044 
6045 	psize = size;
6046 	lsize = size;
6047 
6048 	pabd = abd_alloc_linear(SPA_MAXBLOCKSIZE, B_FALSE);
6049 	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
6050 
6051 	BP_ZERO(bp);
6052 
6053 	DVA_SET_VDEV(&dva[0], vd->vdev_id);
6054 	DVA_SET_OFFSET(&dva[0], offset);
6055 	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
6056 	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
6057 
6058 	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
6059 
6060 	BP_SET_LSIZE(bp, lsize);
6061 	BP_SET_PSIZE(bp, psize);
6062 	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
6063 	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
6064 	BP_SET_TYPE(bp, DMU_OT_NONE);
6065 	BP_SET_LEVEL(bp, 0);
6066 	BP_SET_DEDUP(bp, 0);
6067 	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
6068 
6069 	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6070 	zio = zio_root(spa, NULL, NULL, 0);
6071 
6072 	if (vd == vd->vdev_top) {
6073 		/*
6074 		 * Treat this as a normal block read.
6075 		 */
6076 		zio_nowait(zio_read(zio, spa, bp, pabd, psize, NULL, NULL,
6077 		    ZIO_PRIORITY_SYNC_READ,
6078 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
6079 	} else {
6080 		/*
6081 		 * Treat this as a vdev child I/O.
6082 		 */
6083 		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pabd,
6084 		    psize, ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
6085 		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
6086 		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
6087 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | ZIO_FLAG_OPTIONAL,
6088 		    NULL, NULL));
6089 	}
6090 
6091 	error = zio_wait(zio);
6092 	spa_config_exit(spa, SCL_STATE, FTAG);
6093 
6094 	if (error) {
6095 		(void) printf("Read of %s failed, error: %d\n", thing, error);
6096 		goto out;
6097 	}
6098 
6099 	if (flags & ZDB_FLAG_DECOMPRESS) {
6100 		/*
6101 		 * We don't know how the data was compressed, so just try
6102 		 * every decompress function at every inflated blocksize.
6103 		 */
6104 		enum zio_compress c;
6105 		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
6106 		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
6107 
6108 		abd_copy_to_buf(pbuf2, pabd, psize);
6109 
6110 		VERIFY0(abd_iterate_func(pabd, psize, SPA_MAXBLOCKSIZE - psize,
6111 		    random_get_pseudo_bytes_cb, NULL));
6112 
6113 		VERIFY0(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
6114 		    SPA_MAXBLOCKSIZE - psize));
6115 
6116 		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
6117 		    lsize -= SPA_MINBLOCKSIZE) {
6118 			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
6119 				if (zio_decompress_data(c, pabd,
6120 				    lbuf, psize, lsize) == 0 &&
6121 				    zio_decompress_data_buf(c, pbuf2,
6122 				    lbuf2, psize, lsize) == 0 &&
6123 				    bcmp(lbuf, lbuf2, lsize) == 0)
6124 					break;
6125 			}
6126 			if (c != ZIO_COMPRESS_FUNCTIONS)
6127 				break;
6128 			lsize -= SPA_MINBLOCKSIZE;
6129 		}
6130 
6131 		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
6132 		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
6133 
6134 		if (lsize <= psize) {
6135 			(void) printf("Decompress of %s failed\n", thing);
6136 			goto out;
6137 		}
6138 		buf = lbuf;
6139 		size = lsize;
6140 	} else {
6141 		buf = abd_to_buf(pabd);
6142 		size = psize;
6143 	}
6144 
6145 	if (flags & ZDB_FLAG_PRINT_BLKPTR)
6146 		zdb_print_blkptr((blkptr_t *)(void *)
6147 		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
6148 	else if (flags & ZDB_FLAG_RAW)
6149 		zdb_dump_block_raw(buf, size, flags);
6150 	else if (flags & ZDB_FLAG_INDIRECT)
6151 		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
6152 		    flags);
6153 	else if (flags & ZDB_FLAG_GBH)
6154 		zdb_dump_gbh(buf, flags);
6155 	else
6156 		zdb_dump_block(thing, buf, size, flags);
6157 
6158 out:
6159 	abd_free(pabd);
6160 	umem_free(lbuf, SPA_MAXBLOCKSIZE);
6161 	free(dup);
6162 }
6163 
6164 static void
6165 zdb_embedded_block(char *thing)
6166 {
6167 	blkptr_t bp;
6168 	unsigned long long *words = (void *)&bp;
6169 	char *buf;
6170 	int err;
6171 
6172 	bzero(&bp, sizeof (bp));
6173 	err = sscanf(thing, "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx:"
6174 	    "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx",
6175 	    words + 0, words + 1, words + 2, words + 3,
6176 	    words + 4, words + 5, words + 6, words + 7,
6177 	    words + 8, words + 9, words + 10, words + 11,
6178 	    words + 12, words + 13, words + 14, words + 15);
6179 	if (err != 16) {
6180 		(void) fprintf(stderr, "invalid input format\n");
6181 		exit(1);
6182 	}
6183 	ASSERT3U(BPE_GET_LSIZE(&bp), <=, SPA_MAXBLOCKSIZE);
6184 	buf = malloc(SPA_MAXBLOCKSIZE);
6185 	if (buf == NULL) {
6186 		(void) fprintf(stderr, "out of memory\n");
6187 		exit(1);
6188 	}
6189 	err = decode_embedded_bp(&bp, buf, BPE_GET_LSIZE(&bp));
6190 	if (err != 0) {
6191 		(void) fprintf(stderr, "decode failed: %u\n", err);
6192 		exit(1);
6193 	}
6194 	zdb_dump_block_raw(buf, BPE_GET_LSIZE(&bp), 0);
6195 	free(buf);
6196 }
6197 
6198 int
6199 main(int argc, char **argv)
6200 {
6201 	int c;
6202 	struct rlimit rl = { 1024, 1024 };
6203 	spa_t *spa = NULL;
6204 	objset_t *os = NULL;
6205 	int dump_all = 1;
6206 	int verbose = 0;
6207 	int error = 0;
6208 	char **searchdirs = NULL;
6209 	int nsearch = 0;
6210 	char *target, *target_pool;
6211 	nvlist_t *policy = NULL;
6212 	uint64_t max_txg = UINT64_MAX;
6213 	int flags = ZFS_IMPORT_MISSING_LOG;
6214 	int rewind = ZPOOL_NEVER_REWIND;
6215 	char *spa_config_path_env;
6216 	boolean_t target_is_spa = B_TRUE;
6217 	nvlist_t *cfg = NULL;
6218 
6219 	(void) setrlimit(RLIMIT_NOFILE, &rl);
6220 	(void) enable_extended_FILE_stdio(-1, -1);
6221 
6222 	dprintf_setup(&argc, argv);
6223 
6224 	/*
6225 	 * If there is an environment variable SPA_CONFIG_PATH it overrides
6226 	 * default spa_config_path setting. If -U flag is specified it will
6227 	 * override this environment variable settings once again.
6228 	 */
6229 	spa_config_path_env = getenv("SPA_CONFIG_PATH");
6230 	if (spa_config_path_env != NULL)
6231 		spa_config_path = spa_config_path_env;
6232 
6233 	/*
6234 	 * For performance reasons, we set this tunable down. We do so before
6235 	 * the arg parsing section so that the user can override this value if
6236 	 * they choose.
6237 	 */
6238 	zfs_btree_verify_intensity = 3;
6239 
6240 	while ((c = getopt(argc, argv,
6241 	    "AbcCdDeEFGhiI:klLmMo:Op:PqRsSt:uU:vVx:X")) != -1) {
6242 		switch (c) {
6243 		case 'b':
6244 		case 'c':
6245 		case 'C':
6246 		case 'd':
6247 		case 'D':
6248 		case 'E':
6249 		case 'G':
6250 		case 'h':
6251 		case 'i':
6252 		case 'l':
6253 		case 'm':
6254 		case 'M':
6255 		case 'O':
6256 		case 'R':
6257 		case 's':
6258 		case 'S':
6259 		case 'u':
6260 			dump_opt[c]++;
6261 			dump_all = 0;
6262 			break;
6263 		case 'A':
6264 		case 'e':
6265 		case 'F':
6266 		case 'k':
6267 		case 'L':
6268 		case 'P':
6269 		case 'q':
6270 		case 'X':
6271 			dump_opt[c]++;
6272 			break;
6273 		/* NB: Sort single match options below. */
6274 		case 'I':
6275 			max_inflight = strtoull(optarg, NULL, 0);
6276 			if (max_inflight == 0) {
6277 				(void) fprintf(stderr, "maximum number "
6278 				    "of inflight I/Os must be greater "
6279 				    "than 0\n");
6280 				usage();
6281 			}
6282 			break;
6283 		case 'o':
6284 			error = set_global_var(optarg);
6285 			if (error != 0)
6286 				usage();
6287 			break;
6288 		case 'p':
6289 			if (searchdirs == NULL) {
6290 				searchdirs = umem_alloc(sizeof (char *),
6291 				    UMEM_NOFAIL);
6292 			} else {
6293 				char **tmp = umem_alloc((nsearch + 1) *
6294 				    sizeof (char *), UMEM_NOFAIL);
6295 				bcopy(searchdirs, tmp, nsearch *
6296 				    sizeof (char *));
6297 				umem_free(searchdirs,
6298 				    nsearch * sizeof (char *));
6299 				searchdirs = tmp;
6300 			}
6301 			searchdirs[nsearch++] = optarg;
6302 			break;
6303 		case 't':
6304 			max_txg = strtoull(optarg, NULL, 0);
6305 			if (max_txg < TXG_INITIAL) {
6306 				(void) fprintf(stderr, "incorrect txg "
6307 				    "specified: %s\n", optarg);
6308 				usage();
6309 			}
6310 			break;
6311 		case 'U':
6312 			spa_config_path = optarg;
6313 			if (spa_config_path[0] != '/') {
6314 				(void) fprintf(stderr,
6315 				    "cachefile must be an absolute path "
6316 				    "(i.e. start with a slash)\n");
6317 				usage();
6318 			}
6319 			break;
6320 		case 'v':
6321 			verbose++;
6322 			break;
6323 		case 'V':
6324 			flags = ZFS_IMPORT_VERBATIM;
6325 			break;
6326 		case 'x':
6327 			vn_dumpdir = optarg;
6328 			break;
6329 		default:
6330 			usage();
6331 			break;
6332 		}
6333 	}
6334 
6335 	if (!dump_opt['e'] && searchdirs != NULL) {
6336 		(void) fprintf(stderr, "-p option requires use of -e\n");
6337 		usage();
6338 	}
6339 
6340 	/*
6341 	 * ZDB does not typically re-read blocks; therefore limit the ARC
6342 	 * to 256 MB, which can be used entirely for metadata.
6343 	 */
6344 	zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
6345 
6346 	/*
6347 	 * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
6348 	 * "zdb -b" uses traversal prefetch which uses async reads.
6349 	 * For good performance, let several of them be active at once.
6350 	 */
6351 	zfs_vdev_async_read_max_active = 10;
6352 
6353 	/*
6354 	 * Disable reference tracking for better performance.
6355 	 */
6356 	reference_tracking_enable = B_FALSE;
6357 
6358 	/*
6359 	 * Do not fail spa_load when spa_load_verify fails. This is needed
6360 	 * to load non-idle pools.
6361 	 */
6362 	spa_load_verify_dryrun = B_TRUE;
6363 
6364 	kernel_init(FREAD);
6365 
6366 	if (dump_all)
6367 		verbose = MAX(verbose, 1);
6368 
6369 	for (c = 0; c < 256; c++) {
6370 		if (dump_all && strchr("AeEFklLOPRSX", c) == NULL)
6371 			dump_opt[c] = 1;
6372 		if (dump_opt[c])
6373 			dump_opt[c] += verbose;
6374 	}
6375 
6376 	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
6377 	zfs_recover = (dump_opt['A'] > 1);
6378 
6379 	argc -= optind;
6380 	argv += optind;
6381 
6382 	if (argc < 2 && dump_opt['R'])
6383 		usage();
6384 
6385 	if (dump_opt['E']) {
6386 		if (argc != 1)
6387 			usage();
6388 		zdb_embedded_block(argv[0]);
6389 		return (0);
6390 	}
6391 
6392 	if (argc < 1) {
6393 		if (!dump_opt['e'] && dump_opt['C']) {
6394 			dump_cachefile(spa_config_path);
6395 			return (0);
6396 		}
6397 		usage();
6398 	}
6399 
6400 	if (dump_opt['l'])
6401 		return (dump_label(argv[0]));
6402 
6403 	if (dump_opt['O']) {
6404 		if (argc != 2)
6405 			usage();
6406 		dump_opt['v'] = verbose + 3;
6407 		return (dump_path(argv[0], argv[1]));
6408 	}
6409 
6410 	if (dump_opt['X'] || dump_opt['F'])
6411 		rewind = ZPOOL_DO_REWIND |
6412 		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
6413 
6414 	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
6415 	    nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, max_txg) != 0 ||
6416 	    nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY, rewind) != 0)
6417 		fatal("internal error: %s", strerror(ENOMEM));
6418 
6419 	error = 0;
6420 	target = argv[0];
6421 
6422 	if (strpbrk(target, "/@") != NULL) {
6423 		size_t targetlen;
6424 
6425 		target_pool = strdup(target);
6426 		*strpbrk(target_pool, "/@") = '\0';
6427 
6428 		target_is_spa = B_FALSE;
6429 		targetlen = strlen(target);
6430 		if (targetlen && target[targetlen - 1] == '/')
6431 			target[targetlen - 1] = '\0';
6432 	} else {
6433 		target_pool = target;
6434 	}
6435 
6436 	if (dump_opt['e']) {
6437 		importargs_t args = { 0 };
6438 
6439 		args.paths = nsearch;
6440 		args.path = searchdirs;
6441 		args.can_be_active = B_TRUE;
6442 
6443 		error = zpool_find_config(NULL, target_pool, &cfg, &args,
6444 		    &libzpool_config_ops);
6445 
6446 		if (error == 0) {
6447 
6448 			if (nvlist_add_nvlist(cfg,
6449 			    ZPOOL_LOAD_POLICY, policy) != 0) {
6450 				fatal("can't open '%s': %s",
6451 				    target, strerror(ENOMEM));
6452 			}
6453 
6454 			if (dump_opt['C'] > 1) {
6455 				(void) printf("\nConfiguration for import:\n");
6456 				dump_nvlist(cfg, 8);
6457 			}
6458 
6459 			/*
6460 			 * Disable the activity check to allow examination of
6461 			 * active pools.
6462 			 */
6463 			error = spa_import(target_pool, cfg, NULL,
6464 			    flags | ZFS_IMPORT_SKIP_MMP);
6465 		}
6466 	}
6467 
6468 	char *checkpoint_pool = NULL;
6469 	char *checkpoint_target = NULL;
6470 	if (dump_opt['k']) {
6471 		checkpoint_pool = import_checkpointed_state(target, cfg,
6472 		    &checkpoint_target);
6473 
6474 		if (checkpoint_target != NULL)
6475 			target = checkpoint_target;
6476 
6477 	}
6478 
6479 	if (error == 0) {
6480 		if (dump_opt['k'] && (target_is_spa || dump_opt['R'])) {
6481 			ASSERT(checkpoint_pool != NULL);
6482 			ASSERT(checkpoint_target == NULL);
6483 
6484 			error = spa_open(checkpoint_pool, &spa, FTAG);
6485 			if (error != 0) {
6486 				fatal("Tried to open pool \"%s\" but "
6487 				    "spa_open() failed with error %d\n",
6488 				    checkpoint_pool, error);
6489 			}
6490 
6491 		} else if (target_is_spa || dump_opt['R']) {
6492 			zdb_set_skip_mmp(target);
6493 			error = spa_open_rewind(target, &spa, FTAG, policy,
6494 			    NULL);
6495 			if (error) {
6496 				/*
6497 				 * If we're missing the log device then
6498 				 * try opening the pool after clearing the
6499 				 * log state.
6500 				 */
6501 				mutex_enter(&spa_namespace_lock);
6502 				if ((spa = spa_lookup(target)) != NULL &&
6503 				    spa->spa_log_state == SPA_LOG_MISSING) {
6504 					spa->spa_log_state = SPA_LOG_CLEAR;
6505 					error = 0;
6506 				}
6507 				mutex_exit(&spa_namespace_lock);
6508 
6509 				if (!error) {
6510 					error = spa_open_rewind(target, &spa,
6511 					    FTAG, policy, NULL);
6512 				}
6513 			}
6514 		} else {
6515 			zdb_set_skip_mmp(target);
6516 			error = open_objset(target, DMU_OST_ANY, FTAG, &os);
6517 		}
6518 	}
6519 	nvlist_free(policy);
6520 
6521 	if (error)
6522 		fatal("can't open '%s': %s", target, strerror(error));
6523 
6524 	argv++;
6525 	argc--;
6526 	if (!dump_opt['R']) {
6527 		if (argc > 0) {
6528 			zopt_objects = argc;
6529 			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
6530 			for (unsigned i = 0; i < zopt_objects; i++) {
6531 				errno = 0;
6532 				zopt_object[i] = strtoull(argv[i], NULL, 0);
6533 				if (zopt_object[i] == 0 && errno != 0)
6534 					fatal("bad number %s: %s",
6535 					    argv[i], strerror(errno));
6536 			}
6537 		}
6538 		if (os != NULL) {
6539 			dump_dir(os);
6540 		} else if (zopt_objects > 0 && !dump_opt['m']) {
6541 			dump_dir(spa->spa_meta_objset);
6542 		} else {
6543 			dump_zpool(spa);
6544 		}
6545 	} else {
6546 		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
6547 		flagbits['c'] = ZDB_FLAG_CHECKSUM;
6548 		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
6549 		flagbits['e'] = ZDB_FLAG_BSWAP;
6550 		flagbits['g'] = ZDB_FLAG_GBH;
6551 		flagbits['i'] = ZDB_FLAG_INDIRECT;
6552 		flagbits['p'] = ZDB_FLAG_PHYS;
6553 		flagbits['r'] = ZDB_FLAG_RAW;
6554 
6555 		for (int i = 0; i < argc; i++)
6556 			zdb_read_block(argv[i], spa);
6557 	}
6558 
6559 	if (dump_opt['k']) {
6560 		free(checkpoint_pool);
6561 		if (!target_is_spa)
6562 			free(checkpoint_target);
6563 	}
6564 
6565 	if (os != NULL)
6566 		close_objset(os, FTAG);
6567 	else
6568 		spa_close(spa, FTAG);
6569 
6570 	fuid_table_destroy();
6571 
6572 	dump_debug_buffer();
6573 
6574 	kernel_fini();
6575 
6576 	return (error);
6577 }
6578