xref: /illumos-gate/usr/src/cmd/zdb/zdb.c (revision 43466aae47bfcd2ad9bf501faec8e75c08095e4f)
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) 2013 by Delphix. All rights reserved.
25  */
26 
27 #include <stdio.h>
28 #include <unistd.h>
29 #include <stdio_ext.h>
30 #include <stdlib.h>
31 #include <ctype.h>
32 #include <sys/zfs_context.h>
33 #include <sys/spa.h>
34 #include <sys/spa_impl.h>
35 #include <sys/dmu.h>
36 #include <sys/zap.h>
37 #include <sys/fs/zfs.h>
38 #include <sys/zfs_znode.h>
39 #include <sys/zfs_sa.h>
40 #include <sys/sa.h>
41 #include <sys/sa_impl.h>
42 #include <sys/vdev.h>
43 #include <sys/vdev_impl.h>
44 #include <sys/metaslab_impl.h>
45 #include <sys/dmu_objset.h>
46 #include <sys/dsl_dir.h>
47 #include <sys/dsl_dataset.h>
48 #include <sys/dsl_pool.h>
49 #include <sys/dbuf.h>
50 #include <sys/zil.h>
51 #include <sys/zil_impl.h>
52 #include <sys/stat.h>
53 #include <sys/resource.h>
54 #include <sys/dmu_traverse.h>
55 #include <sys/zio_checksum.h>
56 #include <sys/zio_compress.h>
57 #include <sys/zfs_fuid.h>
58 #include <sys/arc.h>
59 #include <sys/ddt.h>
60 #include <sys/zfeature.h>
61 #include <zfs_comutil.h>
62 #undef ZFS_MAXNAMELEN
63 #undef verify
64 #include <libzfs.h>
65 
66 #define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
67 	zio_compress_table[(idx)].ci_name : "UNKNOWN")
68 #define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
69 	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
70 #define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
71 	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
72 	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
73 #define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
74 	(((idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA) ?	\
75 	DMU_OT_ZAP_OTHER : DMU_OT_NUMTYPES))
76 
77 #ifndef lint
78 extern int zfs_recover;
79 #else
80 int zfs_recover;
81 #endif
82 
83 const char cmdname[] = "zdb";
84 uint8_t dump_opt[256];
85 
86 typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
87 
88 extern void dump_intent_log(zilog_t *);
89 uint64_t *zopt_object = NULL;
90 int zopt_objects = 0;
91 libzfs_handle_t *g_zfs;
92 uint64_t max_inflight = 200;
93 
94 /*
95  * These libumem hooks provide a reasonable set of defaults for the allocator's
96  * debugging facilities.
97  */
98 const char *
99 _umem_debug_init()
100 {
101 	return ("default,verbose"); /* $UMEM_DEBUG setting */
102 }
103 
104 const char *
105 _umem_logging_init(void)
106 {
107 	return ("fail,contents"); /* $UMEM_LOGGING setting */
108 }
109 
110 static void
111 usage(void)
112 {
113 	(void) fprintf(stderr,
114 	    "Usage: %s [-CumdibcsDvhLXFPA] [-t txg] [-e [-p path...]] "
115 	    "[-U config] [-M inflight I/Os] poolname [object...]\n"
116 	    "       %s [-divPA] [-e -p path...] [-U config] dataset "
117 	    "[object...]\n"
118 	    "       %s -m [-LXFPA] [-t txg] [-e [-p path...]] [-U config] "
119 	    "poolname [vdev [metaslab...]]\n"
120 	    "       %s -R [-A] [-e [-p path...]] poolname "
121 	    "vdev:offset:size[:flags]\n"
122 	    "       %s -S [-PA] [-e [-p path...]] [-U config] poolname\n"
123 	    "       %s -l [-uA] device\n"
124 	    "       %s -C [-A] [-U config]\n\n",
125 	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname);
126 
127 	(void) fprintf(stderr, "    Dataset name must include at least one "
128 	    "separator character '/' or '@'\n");
129 	(void) fprintf(stderr, "    If dataset name is specified, only that "
130 	    "dataset is dumped\n");
131 	(void) fprintf(stderr, "    If object numbers are specified, only "
132 	    "those objects are dumped\n\n");
133 	(void) fprintf(stderr, "    Options to control amount of output:\n");
134 	(void) fprintf(stderr, "        -u uberblock\n");
135 	(void) fprintf(stderr, "        -d dataset(s)\n");
136 	(void) fprintf(stderr, "        -i intent logs\n");
137 	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
138 	(void) fprintf(stderr, "        -h pool history\n");
139 	(void) fprintf(stderr, "        -b block statistics\n");
140 	(void) fprintf(stderr, "        -m metaslabs\n");
141 	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
142 	    "all data) blocks\n");
143 	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
144 	(void) fprintf(stderr, "        -D dedup statistics\n");
145 	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
146 	(void) fprintf(stderr, "        -v verbose (applies to all others)\n");
147 	(void) fprintf(stderr, "        -l dump label contents\n");
148 	(void) fprintf(stderr, "        -L disable leak tracking (do not "
149 	    "load spacemaps)\n");
150 	(void) fprintf(stderr, "        -R read and display block from a "
151 	    "device\n\n");
152 	(void) fprintf(stderr, "    Below options are intended for use "
153 	    "with other options (except -l):\n");
154 	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
155 	    "panic recovery (-AA) or both (-AAA)\n");
156 	(void) fprintf(stderr, "        -F attempt automatic rewind within "
157 	    "safe range of transaction groups\n");
158 	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
159 	    "cachefile\n");
160 	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
161 	    "work with dataset)\n");
162 	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
163 	    "has altroot/not in a cachefile\n");
164 	(void) fprintf(stderr, "        -p <path> -- use one or more with "
165 	    "-e to specify path to vdev dir\n");
166 	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
167 	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
168 	    "searching for uberblocks\n");
169 	(void) fprintf(stderr, "        -M <number of inflight I/Os> -- "
170 	    "specify the maximum number of checksumming I/Os [default is 200]");
171 	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
172 	    "to make only that option verbose\n");
173 	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
174 	exit(1);
175 }
176 
177 /*
178  * Called for usage errors that are discovered after a call to spa_open(),
179  * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
180  */
181 
182 static void
183 fatal(const char *fmt, ...)
184 {
185 	va_list ap;
186 
187 	va_start(ap, fmt);
188 	(void) fprintf(stderr, "%s: ", cmdname);
189 	(void) vfprintf(stderr, fmt, ap);
190 	va_end(ap);
191 	(void) fprintf(stderr, "\n");
192 
193 	exit(1);
194 }
195 
196 /* ARGSUSED */
197 static void
198 dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
199 {
200 	nvlist_t *nv;
201 	size_t nvsize = *(uint64_t *)data;
202 	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
203 
204 	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
205 
206 	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
207 
208 	umem_free(packed, nvsize);
209 
210 	dump_nvlist(nv, 8);
211 
212 	nvlist_free(nv);
213 }
214 
215 /* ARGSUSED */
216 static void
217 dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
218 {
219 	spa_history_phys_t *shp = data;
220 
221 	if (shp == NULL)
222 		return;
223 
224 	(void) printf("\t\tpool_create_len = %llu\n",
225 	    (u_longlong_t)shp->sh_pool_create_len);
226 	(void) printf("\t\tphys_max_off = %llu\n",
227 	    (u_longlong_t)shp->sh_phys_max_off);
228 	(void) printf("\t\tbof = %llu\n",
229 	    (u_longlong_t)shp->sh_bof);
230 	(void) printf("\t\teof = %llu\n",
231 	    (u_longlong_t)shp->sh_eof);
232 	(void) printf("\t\trecords_lost = %llu\n",
233 	    (u_longlong_t)shp->sh_records_lost);
234 }
235 
236 static void
237 zdb_nicenum(uint64_t num, char *buf)
238 {
239 	if (dump_opt['P'])
240 		(void) sprintf(buf, "%llu", (longlong_t)num);
241 	else
242 		nicenum(num, buf);
243 }
244 
245 const char histo_stars[] = "****************************************";
246 const int histo_width = sizeof (histo_stars) - 1;
247 
248 static void
249 dump_histogram(const uint64_t *histo, int size, int offset)
250 {
251 	int i;
252 	int minidx = size - 1;
253 	int maxidx = 0;
254 	uint64_t max = 0;
255 
256 	for (i = 0; i < size; i++) {
257 		if (histo[i] > max)
258 			max = histo[i];
259 		if (histo[i] > 0 && i > maxidx)
260 			maxidx = i;
261 		if (histo[i] > 0 && i < minidx)
262 			minidx = i;
263 	}
264 
265 	if (max < histo_width)
266 		max = histo_width;
267 
268 	for (i = minidx; i <= maxidx; i++) {
269 		(void) printf("\t\t\t%3u: %6llu %s\n",
270 		    i + offset, (u_longlong_t)histo[i],
271 		    &histo_stars[(max - histo[i]) * histo_width / max]);
272 	}
273 }
274 
275 static void
276 dump_zap_stats(objset_t *os, uint64_t object)
277 {
278 	int error;
279 	zap_stats_t zs;
280 
281 	error = zap_get_stats(os, object, &zs);
282 	if (error)
283 		return;
284 
285 	if (zs.zs_ptrtbl_len == 0) {
286 		ASSERT(zs.zs_num_blocks == 1);
287 		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
288 		    (u_longlong_t)zs.zs_blocksize,
289 		    (u_longlong_t)zs.zs_num_entries);
290 		return;
291 	}
292 
293 	(void) printf("\tFat ZAP stats:\n");
294 
295 	(void) printf("\t\tPointer table:\n");
296 	(void) printf("\t\t\t%llu elements\n",
297 	    (u_longlong_t)zs.zs_ptrtbl_len);
298 	(void) printf("\t\t\tzt_blk: %llu\n",
299 	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
300 	(void) printf("\t\t\tzt_numblks: %llu\n",
301 	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
302 	(void) printf("\t\t\tzt_shift: %llu\n",
303 	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
304 	(void) printf("\t\t\tzt_blks_copied: %llu\n",
305 	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
306 	(void) printf("\t\t\tzt_nextblk: %llu\n",
307 	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
308 
309 	(void) printf("\t\tZAP entries: %llu\n",
310 	    (u_longlong_t)zs.zs_num_entries);
311 	(void) printf("\t\tLeaf blocks: %llu\n",
312 	    (u_longlong_t)zs.zs_num_leafs);
313 	(void) printf("\t\tTotal blocks: %llu\n",
314 	    (u_longlong_t)zs.zs_num_blocks);
315 	(void) printf("\t\tzap_block_type: 0x%llx\n",
316 	    (u_longlong_t)zs.zs_block_type);
317 	(void) printf("\t\tzap_magic: 0x%llx\n",
318 	    (u_longlong_t)zs.zs_magic);
319 	(void) printf("\t\tzap_salt: 0x%llx\n",
320 	    (u_longlong_t)zs.zs_salt);
321 
322 	(void) printf("\t\tLeafs with 2^n pointers:\n");
323 	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
324 
325 	(void) printf("\t\tBlocks with n*5 entries:\n");
326 	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
327 
328 	(void) printf("\t\tBlocks n/10 full:\n");
329 	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
330 
331 	(void) printf("\t\tEntries with n chunks:\n");
332 	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
333 
334 	(void) printf("\t\tBuckets with n entries:\n");
335 	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
336 }
337 
338 /*ARGSUSED*/
339 static void
340 dump_none(objset_t *os, uint64_t object, void *data, size_t size)
341 {
342 }
343 
344 /*ARGSUSED*/
345 static void
346 dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
347 {
348 	(void) printf("\tUNKNOWN OBJECT TYPE\n");
349 }
350 
351 /*ARGSUSED*/
352 void
353 dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
354 {
355 }
356 
357 /*ARGSUSED*/
358 static void
359 dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
360 {
361 }
362 
363 /*ARGSUSED*/
364 static void
365 dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
366 {
367 	zap_cursor_t zc;
368 	zap_attribute_t attr;
369 	void *prop;
370 	int i;
371 
372 	dump_zap_stats(os, object);
373 	(void) printf("\n");
374 
375 	for (zap_cursor_init(&zc, os, object);
376 	    zap_cursor_retrieve(&zc, &attr) == 0;
377 	    zap_cursor_advance(&zc)) {
378 		(void) printf("\t\t%s = ", attr.za_name);
379 		if (attr.za_num_integers == 0) {
380 			(void) printf("\n");
381 			continue;
382 		}
383 		prop = umem_zalloc(attr.za_num_integers *
384 		    attr.za_integer_length, UMEM_NOFAIL);
385 		(void) zap_lookup(os, object, attr.za_name,
386 		    attr.za_integer_length, attr.za_num_integers, prop);
387 		if (attr.za_integer_length == 1) {
388 			(void) printf("%s", (char *)prop);
389 		} else {
390 			for (i = 0; i < attr.za_num_integers; i++) {
391 				switch (attr.za_integer_length) {
392 				case 2:
393 					(void) printf("%u ",
394 					    ((uint16_t *)prop)[i]);
395 					break;
396 				case 4:
397 					(void) printf("%u ",
398 					    ((uint32_t *)prop)[i]);
399 					break;
400 				case 8:
401 					(void) printf("%lld ",
402 					    (u_longlong_t)((int64_t *)prop)[i]);
403 					break;
404 				}
405 			}
406 		}
407 		(void) printf("\n");
408 		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
409 	}
410 	zap_cursor_fini(&zc);
411 }
412 
413 /*ARGSUSED*/
414 static void
415 dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
416 {
417 	dump_zap_stats(os, object);
418 	/* contents are printed elsewhere, properly decoded */
419 }
420 
421 /*ARGSUSED*/
422 static void
423 dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
424 {
425 	zap_cursor_t zc;
426 	zap_attribute_t attr;
427 
428 	dump_zap_stats(os, object);
429 	(void) printf("\n");
430 
431 	for (zap_cursor_init(&zc, os, object);
432 	    zap_cursor_retrieve(&zc, &attr) == 0;
433 	    zap_cursor_advance(&zc)) {
434 		(void) printf("\t\t%s = ", attr.za_name);
435 		if (attr.za_num_integers == 0) {
436 			(void) printf("\n");
437 			continue;
438 		}
439 		(void) printf(" %llx : [%d:%d:%d]\n",
440 		    (u_longlong_t)attr.za_first_integer,
441 		    (int)ATTR_LENGTH(attr.za_first_integer),
442 		    (int)ATTR_BSWAP(attr.za_first_integer),
443 		    (int)ATTR_NUM(attr.za_first_integer));
444 	}
445 	zap_cursor_fini(&zc);
446 }
447 
448 /*ARGSUSED*/
449 static void
450 dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
451 {
452 	zap_cursor_t zc;
453 	zap_attribute_t attr;
454 	uint16_t *layout_attrs;
455 	int i;
456 
457 	dump_zap_stats(os, object);
458 	(void) printf("\n");
459 
460 	for (zap_cursor_init(&zc, os, object);
461 	    zap_cursor_retrieve(&zc, &attr) == 0;
462 	    zap_cursor_advance(&zc)) {
463 		(void) printf("\t\t%s = [", attr.za_name);
464 		if (attr.za_num_integers == 0) {
465 			(void) printf("\n");
466 			continue;
467 		}
468 
469 		VERIFY(attr.za_integer_length == 2);
470 		layout_attrs = umem_zalloc(attr.za_num_integers *
471 		    attr.za_integer_length, UMEM_NOFAIL);
472 
473 		VERIFY(zap_lookup(os, object, attr.za_name,
474 		    attr.za_integer_length,
475 		    attr.za_num_integers, layout_attrs) == 0);
476 
477 		for (i = 0; i != attr.za_num_integers; i++)
478 			(void) printf(" %d ", (int)layout_attrs[i]);
479 		(void) printf("]\n");
480 		umem_free(layout_attrs,
481 		    attr.za_num_integers * attr.za_integer_length);
482 	}
483 	zap_cursor_fini(&zc);
484 }
485 
486 /*ARGSUSED*/
487 static void
488 dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
489 {
490 	zap_cursor_t zc;
491 	zap_attribute_t attr;
492 	const char *typenames[] = {
493 		/* 0 */ "not specified",
494 		/* 1 */ "FIFO",
495 		/* 2 */ "Character Device",
496 		/* 3 */ "3 (invalid)",
497 		/* 4 */ "Directory",
498 		/* 5 */ "5 (invalid)",
499 		/* 6 */ "Block Device",
500 		/* 7 */ "7 (invalid)",
501 		/* 8 */ "Regular File",
502 		/* 9 */ "9 (invalid)",
503 		/* 10 */ "Symbolic Link",
504 		/* 11 */ "11 (invalid)",
505 		/* 12 */ "Socket",
506 		/* 13 */ "Door",
507 		/* 14 */ "Event Port",
508 		/* 15 */ "15 (invalid)",
509 	};
510 
511 	dump_zap_stats(os, object);
512 	(void) printf("\n");
513 
514 	for (zap_cursor_init(&zc, os, object);
515 	    zap_cursor_retrieve(&zc, &attr) == 0;
516 	    zap_cursor_advance(&zc)) {
517 		(void) printf("\t\t%s = %lld (type: %s)\n",
518 		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
519 		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
520 	}
521 	zap_cursor_fini(&zc);
522 }
523 
524 int
525 get_dtl_refcount(vdev_t *vd)
526 {
527 	int refcount = 0;
528 
529 	if (vd->vdev_ops->vdev_op_leaf) {
530 		space_map_t *sm = vd->vdev_dtl_sm;
531 
532 		if (sm != NULL &&
533 		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
534 			return (1);
535 		return (0);
536 	}
537 
538 	for (int c = 0; c < vd->vdev_children; c++)
539 		refcount += get_dtl_refcount(vd->vdev_child[c]);
540 	return (refcount);
541 }
542 
543 int
544 get_metaslab_refcount(vdev_t *vd)
545 {
546 	int refcount = 0;
547 
548 	if (vd->vdev_top == vd) {
549 		for (int m = 0; m < vd->vdev_ms_count; m++) {
550 			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
551 
552 			if (sm != NULL &&
553 			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
554 				refcount++;
555 		}
556 	}
557 	for (int c = 0; c < vd->vdev_children; c++)
558 		refcount += get_metaslab_refcount(vd->vdev_child[c]);
559 
560 	return (refcount);
561 }
562 
563 static int
564 verify_spacemap_refcounts(spa_t *spa)
565 {
566 	uint64_t expected_refcount = 0;
567 	uint64_t actual_refcount;
568 
569 	(void) feature_get_refcount(spa,
570 	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
571 	    &expected_refcount);
572 	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
573 	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
574 
575 	if (expected_refcount != actual_refcount) {
576 		(void) printf("space map refcount mismatch: expected %lld != "
577 		    "actual %lld\n",
578 		    (longlong_t)expected_refcount,
579 		    (longlong_t)actual_refcount);
580 		return (2);
581 	}
582 	return (0);
583 }
584 
585 static void
586 dump_spacemap(objset_t *os, space_map_t *sm)
587 {
588 	uint64_t alloc, offset, entry;
589 	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
590 			    "INVALID", "INVALID", "INVALID", "INVALID" };
591 
592 	if (sm == NULL)
593 		return;
594 
595 	/*
596 	 * Print out the freelist entries in both encoded and decoded form.
597 	 */
598 	alloc = 0;
599 	for (offset = 0; offset < space_map_length(sm);
600 	    offset += sizeof (entry)) {
601 		uint8_t mapshift = sm->sm_shift;
602 
603 		VERIFY0(dmu_read(os, space_map_object(sm), offset,
604 		    sizeof (entry), &entry, DMU_READ_PREFETCH));
605 		if (SM_DEBUG_DECODE(entry)) {
606 
607 			(void) printf("\t    [%6llu] %s: txg %llu, pass %llu\n",
608 			    (u_longlong_t)(offset / sizeof (entry)),
609 			    ddata[SM_DEBUG_ACTION_DECODE(entry)],
610 			    (u_longlong_t)SM_DEBUG_TXG_DECODE(entry),
611 			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(entry));
612 		} else {
613 			(void) printf("\t    [%6llu]    %c  range:"
614 			    " %010llx-%010llx  size: %06llx\n",
615 			    (u_longlong_t)(offset / sizeof (entry)),
616 			    SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
617 			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
618 			    mapshift) + sm->sm_start),
619 			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
620 			    mapshift) + sm->sm_start +
621 			    (SM_RUN_DECODE(entry) << mapshift)),
622 			    (u_longlong_t)(SM_RUN_DECODE(entry) << mapshift));
623 			if (SM_TYPE_DECODE(entry) == SM_ALLOC)
624 				alloc += SM_RUN_DECODE(entry) << mapshift;
625 			else
626 				alloc -= SM_RUN_DECODE(entry) << mapshift;
627 		}
628 	}
629 	if (alloc != space_map_allocated(sm)) {
630 		(void) printf("space_map_object alloc (%llu) INCONSISTENT "
631 		    "with space map summary (%llu)\n",
632 		    (u_longlong_t)space_map_allocated(sm), (u_longlong_t)alloc);
633 	}
634 }
635 
636 static void
637 dump_metaslab_stats(metaslab_t *msp)
638 {
639 	char maxbuf[32];
640 	range_tree_t *rt = msp->ms_tree;
641 	avl_tree_t *t = &msp->ms_size_tree;
642 	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
643 
644 	zdb_nicenum(metaslab_block_maxsize(msp), maxbuf);
645 
646 	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
647 	    "segments", avl_numnodes(t), "maxsize", maxbuf,
648 	    "freepct", free_pct);
649 	(void) printf("\tIn-memory histogram:\n");
650 	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
651 }
652 
653 static void
654 dump_metaslab(metaslab_t *msp)
655 {
656 	vdev_t *vd = msp->ms_group->mg_vd;
657 	spa_t *spa = vd->vdev_spa;
658 	space_map_t *sm = msp->ms_sm;
659 	char freebuf[32];
660 
661 	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf);
662 
663 	(void) printf(
664 	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
665 	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
666 	    (u_longlong_t)space_map_object(sm), freebuf);
667 
668 	if (dump_opt['m'] > 2 && !dump_opt['L']) {
669 		mutex_enter(&msp->ms_lock);
670 		metaslab_load_wait(msp);
671 		if (!msp->ms_loaded) {
672 			VERIFY0(metaslab_load(msp));
673 			range_tree_stat_verify(msp->ms_tree);
674 		}
675 		dump_metaslab_stats(msp);
676 		metaslab_unload(msp);
677 		mutex_exit(&msp->ms_lock);
678 	}
679 
680 	if (dump_opt['m'] > 1 && sm != NULL &&
681 	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
682 		/*
683 		 * The space map histogram represents free space in chunks
684 		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
685 		 */
686 		(void) printf("\tOn-disk histogram:\n");
687 		dump_histogram(sm->sm_phys->smp_histogram,
688 		    SPACE_MAP_HISTOGRAM_SIZE(sm), sm->sm_shift);
689 	}
690 
691 	if (dump_opt['d'] > 5 || dump_opt['m'] > 3) {
692 		ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
693 
694 		mutex_enter(&msp->ms_lock);
695 		dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
696 		mutex_exit(&msp->ms_lock);
697 	}
698 }
699 
700 static void
701 print_vdev_metaslab_header(vdev_t *vd)
702 {
703 	(void) printf("\tvdev %10llu\n\t%-10s%5llu   %-19s   %-15s   %-10s\n",
704 	    (u_longlong_t)vd->vdev_id,
705 	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
706 	    "offset", "spacemap", "free");
707 	(void) printf("\t%15s   %19s   %15s   %10s\n",
708 	    "---------------", "-------------------",
709 	    "---------------", "-------------");
710 }
711 
712 static void
713 dump_metaslabs(spa_t *spa)
714 {
715 	vdev_t *vd, *rvd = spa->spa_root_vdev;
716 	uint64_t m, c = 0, children = rvd->vdev_children;
717 
718 	(void) printf("\nMetaslabs:\n");
719 
720 	if (!dump_opt['d'] && zopt_objects > 0) {
721 		c = zopt_object[0];
722 
723 		if (c >= children)
724 			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
725 
726 		if (zopt_objects > 1) {
727 			vd = rvd->vdev_child[c];
728 			print_vdev_metaslab_header(vd);
729 
730 			for (m = 1; m < zopt_objects; m++) {
731 				if (zopt_object[m] < vd->vdev_ms_count)
732 					dump_metaslab(
733 					    vd->vdev_ms[zopt_object[m]]);
734 				else
735 					(void) fprintf(stderr, "bad metaslab "
736 					    "number %llu\n",
737 					    (u_longlong_t)zopt_object[m]);
738 			}
739 			(void) printf("\n");
740 			return;
741 		}
742 		children = c + 1;
743 	}
744 	for (; c < children; c++) {
745 		vd = rvd->vdev_child[c];
746 		print_vdev_metaslab_header(vd);
747 
748 		for (m = 0; m < vd->vdev_ms_count; m++)
749 			dump_metaslab(vd->vdev_ms[m]);
750 		(void) printf("\n");
751 	}
752 }
753 
754 static void
755 dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
756 {
757 	const ddt_phys_t *ddp = dde->dde_phys;
758 	const ddt_key_t *ddk = &dde->dde_key;
759 	char *types[4] = { "ditto", "single", "double", "triple" };
760 	char blkbuf[BP_SPRINTF_LEN];
761 	blkptr_t blk;
762 
763 	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
764 		if (ddp->ddp_phys_birth == 0)
765 			continue;
766 		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
767 		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
768 		(void) printf("index %llx refcnt %llu %s %s\n",
769 		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
770 		    types[p], blkbuf);
771 	}
772 }
773 
774 static void
775 dump_dedup_ratio(const ddt_stat_t *dds)
776 {
777 	double rL, rP, rD, D, dedup, compress, copies;
778 
779 	if (dds->dds_blocks == 0)
780 		return;
781 
782 	rL = (double)dds->dds_ref_lsize;
783 	rP = (double)dds->dds_ref_psize;
784 	rD = (double)dds->dds_ref_dsize;
785 	D = (double)dds->dds_dsize;
786 
787 	dedup = rD / D;
788 	compress = rL / rP;
789 	copies = rD / rP;
790 
791 	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
792 	    "dedup * compress / copies = %.2f\n\n",
793 	    dedup, compress, copies, dedup * compress / copies);
794 }
795 
796 static void
797 dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
798 {
799 	char name[DDT_NAMELEN];
800 	ddt_entry_t dde;
801 	uint64_t walk = 0;
802 	dmu_object_info_t doi;
803 	uint64_t count, dspace, mspace;
804 	int error;
805 
806 	error = ddt_object_info(ddt, type, class, &doi);
807 
808 	if (error == ENOENT)
809 		return;
810 	ASSERT(error == 0);
811 
812 	if ((count = ddt_object_count(ddt, type, class)) == 0)
813 		return;
814 
815 	dspace = doi.doi_physical_blocks_512 << 9;
816 	mspace = doi.doi_fill_count * doi.doi_data_block_size;
817 
818 	ddt_object_name(ddt, type, class, name);
819 
820 	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
821 	    name,
822 	    (u_longlong_t)count,
823 	    (u_longlong_t)(dspace / count),
824 	    (u_longlong_t)(mspace / count));
825 
826 	if (dump_opt['D'] < 3)
827 		return;
828 
829 	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
830 
831 	if (dump_opt['D'] < 4)
832 		return;
833 
834 	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
835 		return;
836 
837 	(void) printf("%s contents:\n\n", name);
838 
839 	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
840 		dump_dde(ddt, &dde, walk);
841 
842 	ASSERT(error == ENOENT);
843 
844 	(void) printf("\n");
845 }
846 
847 static void
848 dump_all_ddts(spa_t *spa)
849 {
850 	ddt_histogram_t ddh_total = { 0 };
851 	ddt_stat_t dds_total = { 0 };
852 
853 	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
854 		ddt_t *ddt = spa->spa_ddt[c];
855 		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
856 			for (enum ddt_class class = 0; class < DDT_CLASSES;
857 			    class++) {
858 				dump_ddt(ddt, type, class);
859 			}
860 		}
861 	}
862 
863 	ddt_get_dedup_stats(spa, &dds_total);
864 
865 	if (dds_total.dds_blocks == 0) {
866 		(void) printf("All DDTs are empty\n");
867 		return;
868 	}
869 
870 	(void) printf("\n");
871 
872 	if (dump_opt['D'] > 1) {
873 		(void) printf("DDT histogram (aggregated over all DDTs):\n");
874 		ddt_get_dedup_histogram(spa, &ddh_total);
875 		zpool_dump_ddt(&dds_total, &ddh_total);
876 	}
877 
878 	dump_dedup_ratio(&dds_total);
879 }
880 
881 static void
882 dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
883 {
884 	char *prefix = arg;
885 
886 	(void) printf("%s [%llu,%llu) length %llu\n",
887 	    prefix,
888 	    (u_longlong_t)start,
889 	    (u_longlong_t)(start + size),
890 	    (u_longlong_t)(size));
891 }
892 
893 static void
894 dump_dtl(vdev_t *vd, int indent)
895 {
896 	spa_t *spa = vd->vdev_spa;
897 	boolean_t required;
898 	char *name[DTL_TYPES] = { "missing", "partial", "scrub", "outage" };
899 	char prefix[256];
900 
901 	spa_vdev_state_enter(spa, SCL_NONE);
902 	required = vdev_dtl_required(vd);
903 	(void) spa_vdev_state_exit(spa, NULL, 0);
904 
905 	if (indent == 0)
906 		(void) printf("\nDirty time logs:\n\n");
907 
908 	(void) printf("\t%*s%s [%s]\n", indent, "",
909 	    vd->vdev_path ? vd->vdev_path :
910 	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
911 	    required ? "DTL-required" : "DTL-expendable");
912 
913 	for (int t = 0; t < DTL_TYPES; t++) {
914 		range_tree_t *rt = vd->vdev_dtl[t];
915 		if (range_tree_space(rt) == 0)
916 			continue;
917 		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
918 		    indent + 2, "", name[t]);
919 		mutex_enter(rt->rt_lock);
920 		range_tree_walk(rt, dump_dtl_seg, prefix);
921 		mutex_exit(rt->rt_lock);
922 		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
923 			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
924 	}
925 
926 	for (int c = 0; c < vd->vdev_children; c++)
927 		dump_dtl(vd->vdev_child[c], indent + 4);
928 }
929 
930 static void
931 dump_history(spa_t *spa)
932 {
933 	nvlist_t **events = NULL;
934 	char buf[SPA_MAXBLOCKSIZE];
935 	uint64_t resid, len, off = 0;
936 	uint_t num = 0;
937 	int error;
938 	time_t tsec;
939 	struct tm t;
940 	char tbuf[30];
941 	char internalstr[MAXPATHLEN];
942 
943 	do {
944 		len = sizeof (buf);
945 
946 		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
947 			(void) fprintf(stderr, "Unable to read history: "
948 			    "error %d\n", error);
949 			return;
950 		}
951 
952 		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
953 			break;
954 
955 		off -= resid;
956 	} while (len != 0);
957 
958 	(void) printf("\nHistory:\n");
959 	for (int i = 0; i < num; i++) {
960 		uint64_t time, txg, ievent;
961 		char *cmd, *intstr;
962 		boolean_t printed = B_FALSE;
963 
964 		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
965 		    &time) != 0)
966 			goto next;
967 		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
968 		    &cmd) != 0) {
969 			if (nvlist_lookup_uint64(events[i],
970 			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
971 				goto next;
972 			verify(nvlist_lookup_uint64(events[i],
973 			    ZPOOL_HIST_TXG, &txg) == 0);
974 			verify(nvlist_lookup_string(events[i],
975 			    ZPOOL_HIST_INT_STR, &intstr) == 0);
976 			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
977 				goto next;
978 
979 			(void) snprintf(internalstr,
980 			    sizeof (internalstr),
981 			    "[internal %s txg:%lld] %s",
982 			    zfs_history_event_names[ievent], txg,
983 			    intstr);
984 			cmd = internalstr;
985 		}
986 		tsec = time;
987 		(void) localtime_r(&tsec, &t);
988 		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
989 		(void) printf("%s %s\n", tbuf, cmd);
990 		printed = B_TRUE;
991 
992 next:
993 		if (dump_opt['h'] > 1) {
994 			if (!printed)
995 				(void) printf("unrecognized record:\n");
996 			dump_nvlist(events[i], 2);
997 		}
998 	}
999 }
1000 
1001 /*ARGSUSED*/
1002 static void
1003 dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1004 {
1005 }
1006 
1007 static uint64_t
1008 blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp, const zbookmark_t *zb)
1009 {
1010 	if (dnp == NULL) {
1011 		ASSERT(zb->zb_level < 0);
1012 		if (zb->zb_object == 0)
1013 			return (zb->zb_blkid);
1014 		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1015 	}
1016 
1017 	ASSERT(zb->zb_level >= 0);
1018 
1019 	return ((zb->zb_blkid <<
1020 	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1021 	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1022 }
1023 
1024 static void
1025 snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1026 {
1027 	const dva_t *dva = bp->blk_dva;
1028 	int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1029 
1030 	if (dump_opt['b'] >= 6) {
1031 		snprintf_blkptr(blkbuf, buflen, bp);
1032 		return;
1033 	}
1034 
1035 	blkbuf[0] = '\0';
1036 
1037 	for (int i = 0; i < ndvas; i++)
1038 		(void) snprintf(blkbuf + strlen(blkbuf),
1039 		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1040 		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1041 		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1042 		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1043 
1044 	if (BP_IS_HOLE(bp)) {
1045 		(void) snprintf(blkbuf + strlen(blkbuf),
1046 		    buflen - strlen(blkbuf), "B=%llu",
1047 		    (u_longlong_t)bp->blk_birth);
1048 	} else {
1049 		(void) snprintf(blkbuf + strlen(blkbuf),
1050 		    buflen - strlen(blkbuf),
1051 		    "%llxL/%llxP F=%llu B=%llu/%llu",
1052 		    (u_longlong_t)BP_GET_LSIZE(bp),
1053 		    (u_longlong_t)BP_GET_PSIZE(bp),
1054 		    (u_longlong_t)bp->blk_fill,
1055 		    (u_longlong_t)bp->blk_birth,
1056 		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1057 	}
1058 }
1059 
1060 static void
1061 print_indirect(blkptr_t *bp, const zbookmark_t *zb,
1062     const dnode_phys_t *dnp)
1063 {
1064 	char blkbuf[BP_SPRINTF_LEN];
1065 	int l;
1066 
1067 	ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1068 	ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1069 
1070 	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1071 
1072 	ASSERT(zb->zb_level >= 0);
1073 
1074 	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1075 		if (l == zb->zb_level) {
1076 			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1077 		} else {
1078 			(void) printf(" ");
1079 		}
1080 	}
1081 
1082 	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1083 	(void) printf("%s\n", blkbuf);
1084 }
1085 
1086 static int
1087 visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1088     blkptr_t *bp, const zbookmark_t *zb)
1089 {
1090 	int err = 0;
1091 
1092 	if (bp->blk_birth == 0)
1093 		return (0);
1094 
1095 	print_indirect(bp, zb, dnp);
1096 
1097 	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1098 		uint32_t flags = ARC_WAIT;
1099 		int i;
1100 		blkptr_t *cbp;
1101 		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1102 		arc_buf_t *buf;
1103 		uint64_t fill = 0;
1104 
1105 		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1106 		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1107 		if (err)
1108 			return (err);
1109 		ASSERT(buf->b_data);
1110 
1111 		/* recursively visit blocks below this */
1112 		cbp = buf->b_data;
1113 		for (i = 0; i < epb; i++, cbp++) {
1114 			zbookmark_t czb;
1115 
1116 			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1117 			    zb->zb_level - 1,
1118 			    zb->zb_blkid * epb + i);
1119 			err = visit_indirect(spa, dnp, cbp, &czb);
1120 			if (err)
1121 				break;
1122 			fill += cbp->blk_fill;
1123 		}
1124 		if (!err)
1125 			ASSERT3U(fill, ==, bp->blk_fill);
1126 		(void) arc_buf_remove_ref(buf, &buf);
1127 	}
1128 
1129 	return (err);
1130 }
1131 
1132 /*ARGSUSED*/
1133 static void
1134 dump_indirect(dnode_t *dn)
1135 {
1136 	dnode_phys_t *dnp = dn->dn_phys;
1137 	int j;
1138 	zbookmark_t czb;
1139 
1140 	(void) printf("Indirect blocks:\n");
1141 
1142 	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1143 	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1144 	for (j = 0; j < dnp->dn_nblkptr; j++) {
1145 		czb.zb_blkid = j;
1146 		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1147 		    &dnp->dn_blkptr[j], &czb);
1148 	}
1149 
1150 	(void) printf("\n");
1151 }
1152 
1153 /*ARGSUSED*/
1154 static void
1155 dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1156 {
1157 	dsl_dir_phys_t *dd = data;
1158 	time_t crtime;
1159 	char nice[32];
1160 
1161 	if (dd == NULL)
1162 		return;
1163 
1164 	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1165 
1166 	crtime = dd->dd_creation_time;
1167 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1168 	(void) printf("\t\thead_dataset_obj = %llu\n",
1169 	    (u_longlong_t)dd->dd_head_dataset_obj);
1170 	(void) printf("\t\tparent_dir_obj = %llu\n",
1171 	    (u_longlong_t)dd->dd_parent_obj);
1172 	(void) printf("\t\torigin_obj = %llu\n",
1173 	    (u_longlong_t)dd->dd_origin_obj);
1174 	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1175 	    (u_longlong_t)dd->dd_child_dir_zapobj);
1176 	zdb_nicenum(dd->dd_used_bytes, nice);
1177 	(void) printf("\t\tused_bytes = %s\n", nice);
1178 	zdb_nicenum(dd->dd_compressed_bytes, nice);
1179 	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1180 	zdb_nicenum(dd->dd_uncompressed_bytes, nice);
1181 	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1182 	zdb_nicenum(dd->dd_quota, nice);
1183 	(void) printf("\t\tquota = %s\n", nice);
1184 	zdb_nicenum(dd->dd_reserved, nice);
1185 	(void) printf("\t\treserved = %s\n", nice);
1186 	(void) printf("\t\tprops_zapobj = %llu\n",
1187 	    (u_longlong_t)dd->dd_props_zapobj);
1188 	(void) printf("\t\tdeleg_zapobj = %llu\n",
1189 	    (u_longlong_t)dd->dd_deleg_zapobj);
1190 	(void) printf("\t\tflags = %llx\n",
1191 	    (u_longlong_t)dd->dd_flags);
1192 
1193 #define	DO(which) \
1194 	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice); \
1195 	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1196 	DO(HEAD);
1197 	DO(SNAP);
1198 	DO(CHILD);
1199 	DO(CHILD_RSRV);
1200 	DO(REFRSRV);
1201 #undef DO
1202 }
1203 
1204 /*ARGSUSED*/
1205 static void
1206 dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1207 {
1208 	dsl_dataset_phys_t *ds = data;
1209 	time_t crtime;
1210 	char used[32], compressed[32], uncompressed[32], unique[32];
1211 	char blkbuf[BP_SPRINTF_LEN];
1212 
1213 	if (ds == NULL)
1214 		return;
1215 
1216 	ASSERT(size == sizeof (*ds));
1217 	crtime = ds->ds_creation_time;
1218 	zdb_nicenum(ds->ds_referenced_bytes, used);
1219 	zdb_nicenum(ds->ds_compressed_bytes, compressed);
1220 	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed);
1221 	zdb_nicenum(ds->ds_unique_bytes, unique);
1222 	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1223 
1224 	(void) printf("\t\tdir_obj = %llu\n",
1225 	    (u_longlong_t)ds->ds_dir_obj);
1226 	(void) printf("\t\tprev_snap_obj = %llu\n",
1227 	    (u_longlong_t)ds->ds_prev_snap_obj);
1228 	(void) printf("\t\tprev_snap_txg = %llu\n",
1229 	    (u_longlong_t)ds->ds_prev_snap_txg);
1230 	(void) printf("\t\tnext_snap_obj = %llu\n",
1231 	    (u_longlong_t)ds->ds_next_snap_obj);
1232 	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1233 	    (u_longlong_t)ds->ds_snapnames_zapobj);
1234 	(void) printf("\t\tnum_children = %llu\n",
1235 	    (u_longlong_t)ds->ds_num_children);
1236 	(void) printf("\t\tuserrefs_obj = %llu\n",
1237 	    (u_longlong_t)ds->ds_userrefs_obj);
1238 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1239 	(void) printf("\t\tcreation_txg = %llu\n",
1240 	    (u_longlong_t)ds->ds_creation_txg);
1241 	(void) printf("\t\tdeadlist_obj = %llu\n",
1242 	    (u_longlong_t)ds->ds_deadlist_obj);
1243 	(void) printf("\t\tused_bytes = %s\n", used);
1244 	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1245 	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1246 	(void) printf("\t\tunique = %s\n", unique);
1247 	(void) printf("\t\tfsid_guid = %llu\n",
1248 	    (u_longlong_t)ds->ds_fsid_guid);
1249 	(void) printf("\t\tguid = %llu\n",
1250 	    (u_longlong_t)ds->ds_guid);
1251 	(void) printf("\t\tflags = %llx\n",
1252 	    (u_longlong_t)ds->ds_flags);
1253 	(void) printf("\t\tnext_clones_obj = %llu\n",
1254 	    (u_longlong_t)ds->ds_next_clones_obj);
1255 	(void) printf("\t\tprops_obj = %llu\n",
1256 	    (u_longlong_t)ds->ds_props_obj);
1257 	(void) printf("\t\tbp = %s\n", blkbuf);
1258 }
1259 
1260 /* ARGSUSED */
1261 static int
1262 dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1263 {
1264 	char blkbuf[BP_SPRINTF_LEN];
1265 
1266 	if (bp->blk_birth != 0) {
1267 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1268 		(void) printf("\t%s\n", blkbuf);
1269 	}
1270 	return (0);
1271 }
1272 
1273 static void
1274 dump_bptree(objset_t *os, uint64_t obj, char *name)
1275 {
1276 	char bytes[32];
1277 	bptree_phys_t *bt;
1278 	dmu_buf_t *db;
1279 
1280 	if (dump_opt['d'] < 3)
1281 		return;
1282 
1283 	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1284 	bt = db->db_data;
1285 	zdb_nicenum(bt->bt_bytes, bytes);
1286 	(void) printf("\n    %s: %llu datasets, %s\n",
1287 	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1288 	dmu_buf_rele(db, FTAG);
1289 
1290 	if (dump_opt['d'] < 5)
1291 		return;
1292 
1293 	(void) printf("\n");
1294 
1295 	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1296 }
1297 
1298 /* ARGSUSED */
1299 static int
1300 dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1301 {
1302 	char blkbuf[BP_SPRINTF_LEN];
1303 
1304 	ASSERT(bp->blk_birth != 0);
1305 	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1306 	(void) printf("\t%s\n", blkbuf);
1307 	return (0);
1308 }
1309 
1310 static void
1311 dump_bpobj(bpobj_t *bpo, char *name, int indent)
1312 {
1313 	char bytes[32];
1314 	char comp[32];
1315 	char uncomp[32];
1316 
1317 	if (dump_opt['d'] < 3)
1318 		return;
1319 
1320 	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes);
1321 	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1322 		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp);
1323 		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp);
1324 		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1325 		    "%llu subobjs, %s (%s/%s comp)\n",
1326 		    indent * 8, name,
1327 		    (u_longlong_t)bpo->bpo_object,
1328 		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1329 		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1330 		    bytes, comp, uncomp);
1331 
1332 		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1333 			uint64_t subobj;
1334 			bpobj_t subbpo;
1335 			int error;
1336 			VERIFY0(dmu_read(bpo->bpo_os,
1337 			    bpo->bpo_phys->bpo_subobjs,
1338 			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1339 			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1340 			if (error != 0) {
1341 				(void) printf("ERROR %u while trying to open "
1342 				    "subobj id %llu\n",
1343 				    error, (u_longlong_t)subobj);
1344 				continue;
1345 			}
1346 			dump_bpobj(&subbpo, "subobj", indent + 1);
1347 			bpobj_close(&subbpo);
1348 		}
1349 	} else {
1350 		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1351 		    indent * 8, name,
1352 		    (u_longlong_t)bpo->bpo_object,
1353 		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1354 		    bytes);
1355 	}
1356 
1357 	if (dump_opt['d'] < 5)
1358 		return;
1359 
1360 
1361 	if (indent == 0) {
1362 		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1363 		(void) printf("\n");
1364 	}
1365 }
1366 
1367 static void
1368 dump_deadlist(dsl_deadlist_t *dl)
1369 {
1370 	dsl_deadlist_entry_t *dle;
1371 	uint64_t unused;
1372 	char bytes[32];
1373 	char comp[32];
1374 	char uncomp[32];
1375 
1376 	if (dump_opt['d'] < 3)
1377 		return;
1378 
1379 	zdb_nicenum(dl->dl_phys->dl_used, bytes);
1380 	zdb_nicenum(dl->dl_phys->dl_comp, comp);
1381 	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp);
1382 	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1383 	    bytes, comp, uncomp);
1384 
1385 	if (dump_opt['d'] < 4)
1386 		return;
1387 
1388 	(void) printf("\n");
1389 
1390 	/* force the tree to be loaded */
1391 	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1392 
1393 	for (dle = avl_first(&dl->dl_tree); dle;
1394 	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1395 		if (dump_opt['d'] >= 5) {
1396 			char buf[128];
1397 			(void) snprintf(buf, sizeof (buf), "mintxg %llu -> ",
1398 			    (longlong_t)dle->dle_mintxg,
1399 			    (longlong_t)dle->dle_bpobj.bpo_object);
1400 
1401 			dump_bpobj(&dle->dle_bpobj, buf, 0);
1402 		} else {
1403 			(void) printf("mintxg %llu -> obj %llu\n",
1404 			    (longlong_t)dle->dle_mintxg,
1405 			    (longlong_t)dle->dle_bpobj.bpo_object);
1406 
1407 		}
1408 	}
1409 }
1410 
1411 static avl_tree_t idx_tree;
1412 static avl_tree_t domain_tree;
1413 static boolean_t fuid_table_loaded;
1414 static boolean_t sa_loaded;
1415 sa_attr_type_t *sa_attr_table;
1416 
1417 static void
1418 fuid_table_destroy()
1419 {
1420 	if (fuid_table_loaded) {
1421 		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1422 		fuid_table_loaded = B_FALSE;
1423 	}
1424 }
1425 
1426 /*
1427  * print uid or gid information.
1428  * For normal POSIX id just the id is printed in decimal format.
1429  * For CIFS files with FUID the fuid is printed in hex followed by
1430  * the domain-rid string.
1431  */
1432 static void
1433 print_idstr(uint64_t id, const char *id_type)
1434 {
1435 	if (FUID_INDEX(id)) {
1436 		char *domain;
1437 
1438 		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1439 		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1440 		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1441 	} else {
1442 		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1443 	}
1444 
1445 }
1446 
1447 static void
1448 dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1449 {
1450 	uint32_t uid_idx, gid_idx;
1451 
1452 	uid_idx = FUID_INDEX(uid);
1453 	gid_idx = FUID_INDEX(gid);
1454 
1455 	/* Load domain table, if not already loaded */
1456 	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1457 		uint64_t fuid_obj;
1458 
1459 		/* first find the fuid object.  It lives in the master node */
1460 		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1461 		    8, 1, &fuid_obj) == 0);
1462 		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1463 		(void) zfs_fuid_table_load(os, fuid_obj,
1464 		    &idx_tree, &domain_tree);
1465 		fuid_table_loaded = B_TRUE;
1466 	}
1467 
1468 	print_idstr(uid, "uid");
1469 	print_idstr(gid, "gid");
1470 }
1471 
1472 /*ARGSUSED*/
1473 static void
1474 dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1475 {
1476 	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
1477 	sa_handle_t *hdl;
1478 	uint64_t xattr, rdev, gen;
1479 	uint64_t uid, gid, mode, fsize, parent, links;
1480 	uint64_t pflags;
1481 	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1482 	time_t z_crtime, z_atime, z_mtime, z_ctime;
1483 	sa_bulk_attr_t bulk[12];
1484 	int idx = 0;
1485 	int error;
1486 
1487 	if (!sa_loaded) {
1488 		uint64_t sa_attrs = 0;
1489 		uint64_t version;
1490 
1491 		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1492 		    8, 1, &version) == 0);
1493 		if (version >= ZPL_VERSION_SA) {
1494 			VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1495 			    8, 1, &sa_attrs) == 0);
1496 		}
1497 		if ((error = sa_setup(os, sa_attrs, zfs_attr_table,
1498 		    ZPL_END, &sa_attr_table)) != 0) {
1499 			(void) printf("sa_setup failed errno %d, can't "
1500 			    "display znode contents\n", error);
1501 			return;
1502 		}
1503 		sa_loaded = B_TRUE;
1504 	}
1505 
1506 	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1507 		(void) printf("Failed to get handle for SA znode\n");
1508 		return;
1509 	}
1510 
1511 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1512 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1513 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1514 	    &links, 8);
1515 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1516 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1517 	    &mode, 8);
1518 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1519 	    NULL, &parent, 8);
1520 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
1521 	    &fsize, 8);
1522 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
1523 	    acctm, 16);
1524 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
1525 	    modtm, 16);
1526 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
1527 	    crtm, 16);
1528 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
1529 	    chgtm, 16);
1530 	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
1531 	    &pflags, 8);
1532 
1533 	if (sa_bulk_lookup(hdl, bulk, idx)) {
1534 		(void) sa_handle_destroy(hdl);
1535 		return;
1536 	}
1537 
1538 	error = zfs_obj_to_path(os, object, path, sizeof (path));
1539 	if (error != 0) {
1540 		(void) snprintf(path, sizeof (path), "\?\?\?<object#%llu>",
1541 		    (u_longlong_t)object);
1542 	}
1543 	if (dump_opt['d'] < 3) {
1544 		(void) printf("\t%s\n", path);
1545 		(void) sa_handle_destroy(hdl);
1546 		return;
1547 	}
1548 
1549 	z_crtime = (time_t)crtm[0];
1550 	z_atime = (time_t)acctm[0];
1551 	z_mtime = (time_t)modtm[0];
1552 	z_ctime = (time_t)chgtm[0];
1553 
1554 	(void) printf("\tpath	%s\n", path);
1555 	dump_uidgid(os, uid, gid);
1556 	(void) printf("\tatime	%s", ctime(&z_atime));
1557 	(void) printf("\tmtime	%s", ctime(&z_mtime));
1558 	(void) printf("\tctime	%s", ctime(&z_ctime));
1559 	(void) printf("\tcrtime	%s", ctime(&z_crtime));
1560 	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
1561 	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
1562 	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
1563 	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
1564 	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
1565 	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
1566 	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
1567 	    sizeof (uint64_t)) == 0)
1568 		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
1569 	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
1570 	    sizeof (uint64_t)) == 0)
1571 		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
1572 	sa_handle_destroy(hdl);
1573 }
1574 
1575 /*ARGSUSED*/
1576 static void
1577 dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
1578 {
1579 }
1580 
1581 /*ARGSUSED*/
1582 static void
1583 dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
1584 {
1585 }
1586 
1587 static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
1588 	dump_none,		/* unallocated			*/
1589 	dump_zap,		/* object directory		*/
1590 	dump_uint64,		/* object array			*/
1591 	dump_none,		/* packed nvlist		*/
1592 	dump_packed_nvlist,	/* packed nvlist size		*/
1593 	dump_none,		/* bplist			*/
1594 	dump_none,		/* bplist header		*/
1595 	dump_none,		/* SPA space map header		*/
1596 	dump_none,		/* SPA space map		*/
1597 	dump_none,		/* ZIL intent log		*/
1598 	dump_dnode,		/* DMU dnode			*/
1599 	dump_dmu_objset,	/* DMU objset			*/
1600 	dump_dsl_dir,		/* DSL directory		*/
1601 	dump_zap,		/* DSL directory child map	*/
1602 	dump_zap,		/* DSL dataset snap map		*/
1603 	dump_zap,		/* DSL props			*/
1604 	dump_dsl_dataset,	/* DSL dataset			*/
1605 	dump_znode,		/* ZFS znode			*/
1606 	dump_acl,		/* ZFS V0 ACL			*/
1607 	dump_uint8,		/* ZFS plain file		*/
1608 	dump_zpldir,		/* ZFS directory		*/
1609 	dump_zap,		/* ZFS master node		*/
1610 	dump_zap,		/* ZFS delete queue		*/
1611 	dump_uint8,		/* zvol object			*/
1612 	dump_zap,		/* zvol prop			*/
1613 	dump_uint8,		/* other uint8[]		*/
1614 	dump_uint64,		/* other uint64[]		*/
1615 	dump_zap,		/* other ZAP			*/
1616 	dump_zap,		/* persistent error log		*/
1617 	dump_uint8,		/* SPA history			*/
1618 	dump_history_offsets,	/* SPA history offsets		*/
1619 	dump_zap,		/* Pool properties		*/
1620 	dump_zap,		/* DSL permissions		*/
1621 	dump_acl,		/* ZFS ACL			*/
1622 	dump_uint8,		/* ZFS SYSACL			*/
1623 	dump_none,		/* FUID nvlist			*/
1624 	dump_packed_nvlist,	/* FUID nvlist size		*/
1625 	dump_zap,		/* DSL dataset next clones	*/
1626 	dump_zap,		/* DSL scrub queue		*/
1627 	dump_zap,		/* ZFS user/group used		*/
1628 	dump_zap,		/* ZFS user/group quota		*/
1629 	dump_zap,		/* snapshot refcount tags	*/
1630 	dump_ddt_zap,		/* DDT ZAP object		*/
1631 	dump_zap,		/* DDT statistics		*/
1632 	dump_znode,		/* SA object			*/
1633 	dump_zap,		/* SA Master Node		*/
1634 	dump_sa_attrs,		/* SA attribute registration	*/
1635 	dump_sa_layouts,	/* SA attribute layouts		*/
1636 	dump_zap,		/* DSL scrub translations	*/
1637 	dump_none,		/* fake dedup BP		*/
1638 	dump_zap,		/* deadlist			*/
1639 	dump_none,		/* deadlist hdr			*/
1640 	dump_zap,		/* dsl clones			*/
1641 	dump_none,		/* bpobj subobjs		*/
1642 	dump_unknown,		/* Unknown type, must be last	*/
1643 };
1644 
1645 static void
1646 dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
1647 {
1648 	dmu_buf_t *db = NULL;
1649 	dmu_object_info_t doi;
1650 	dnode_t *dn;
1651 	void *bonus = NULL;
1652 	size_t bsize = 0;
1653 	char iblk[32], dblk[32], lsize[32], asize[32], fill[32];
1654 	char bonus_size[32];
1655 	char aux[50];
1656 	int error;
1657 
1658 	if (*print_header) {
1659 		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
1660 		    "Object", "lvl", "iblk", "dblk", "dsize", "lsize",
1661 		    "%full", "type");
1662 		*print_header = 0;
1663 	}
1664 
1665 	if (object == 0) {
1666 		dn = DMU_META_DNODE(os);
1667 	} else {
1668 		error = dmu_bonus_hold(os, object, FTAG, &db);
1669 		if (error)
1670 			fatal("dmu_bonus_hold(%llu) failed, errno %u",
1671 			    object, error);
1672 		bonus = db->db_data;
1673 		bsize = db->db_size;
1674 		dn = DB_DNODE((dmu_buf_impl_t *)db);
1675 	}
1676 	dmu_object_info_from_dnode(dn, &doi);
1677 
1678 	zdb_nicenum(doi.doi_metadata_block_size, iblk);
1679 	zdb_nicenum(doi.doi_data_block_size, dblk);
1680 	zdb_nicenum(doi.doi_max_offset, lsize);
1681 	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize);
1682 	zdb_nicenum(doi.doi_bonus_size, bonus_size);
1683 	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
1684 	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
1685 	    doi.doi_max_offset);
1686 
1687 	aux[0] = '\0';
1688 
1689 	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
1690 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
1691 		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
1692 	}
1693 
1694 	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
1695 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
1696 		    ZDB_COMPRESS_NAME(doi.doi_compress));
1697 	}
1698 
1699 	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %6s  %s%s\n",
1700 	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk,
1701 	    asize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
1702 
1703 	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
1704 		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
1705 		    "", "", "", "", "", bonus_size, "bonus",
1706 		    ZDB_OT_NAME(doi.doi_bonus_type));
1707 	}
1708 
1709 	if (verbosity >= 4) {
1710 		(void) printf("\tdnode flags: %s%s%s\n",
1711 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
1712 		    "USED_BYTES " : "",
1713 		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
1714 		    "USERUSED_ACCOUNTED " : "",
1715 		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
1716 		    "SPILL_BLKPTR" : "");
1717 		(void) printf("\tdnode maxblkid: %llu\n",
1718 		    (longlong_t)dn->dn_phys->dn_maxblkid);
1719 
1720 		object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
1721 		    bonus, bsize);
1722 		object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
1723 		*print_header = 1;
1724 	}
1725 
1726 	if (verbosity >= 5)
1727 		dump_indirect(dn);
1728 
1729 	if (verbosity >= 5) {
1730 		/*
1731 		 * Report the list of segments that comprise the object.
1732 		 */
1733 		uint64_t start = 0;
1734 		uint64_t end;
1735 		uint64_t blkfill = 1;
1736 		int minlvl = 1;
1737 
1738 		if (dn->dn_type == DMU_OT_DNODE) {
1739 			minlvl = 0;
1740 			blkfill = DNODES_PER_BLOCK;
1741 		}
1742 
1743 		for (;;) {
1744 			char segsize[32];
1745 			error = dnode_next_offset(dn,
1746 			    0, &start, minlvl, blkfill, 0);
1747 			if (error)
1748 				break;
1749 			end = start;
1750 			error = dnode_next_offset(dn,
1751 			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
1752 			zdb_nicenum(end - start, segsize);
1753 			(void) printf("\t\tsegment [%016llx, %016llx)"
1754 			    " size %5s\n", (u_longlong_t)start,
1755 			    (u_longlong_t)end, segsize);
1756 			if (error)
1757 				break;
1758 			start = end;
1759 		}
1760 	}
1761 
1762 	if (db != NULL)
1763 		dmu_buf_rele(db, FTAG);
1764 }
1765 
1766 static char *objset_types[DMU_OST_NUMTYPES] = {
1767 	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1768 
1769 static void
1770 dump_dir(objset_t *os)
1771 {
1772 	dmu_objset_stats_t dds;
1773 	uint64_t object, object_count;
1774 	uint64_t refdbytes, usedobjs, scratch;
1775 	char numbuf[32];
1776 	char blkbuf[BP_SPRINTF_LEN + 20];
1777 	char osname[MAXNAMELEN];
1778 	char *type = "UNKNOWN";
1779 	int verbosity = dump_opt['d'];
1780 	int print_header = 1;
1781 	int i, error;
1782 
1783 	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
1784 	dmu_objset_fast_stat(os, &dds);
1785 	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
1786 
1787 	if (dds.dds_type < DMU_OST_NUMTYPES)
1788 		type = objset_types[dds.dds_type];
1789 
1790 	if (dds.dds_type == DMU_OST_META) {
1791 		dds.dds_creation_txg = TXG_INITIAL;
1792 		usedobjs = os->os_rootbp->blk_fill;
1793 		refdbytes = os->os_spa->spa_dsl_pool->
1794 		    dp_mos_dir->dd_phys->dd_used_bytes;
1795 	} else {
1796 		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
1797 	}
1798 
1799 	ASSERT3U(usedobjs, ==, os->os_rootbp->blk_fill);
1800 
1801 	zdb_nicenum(refdbytes, numbuf);
1802 
1803 	if (verbosity >= 4) {
1804 		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
1805 		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
1806 		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
1807 	} else {
1808 		blkbuf[0] = '\0';
1809 	}
1810 
1811 	dmu_objset_name(os, osname);
1812 
1813 	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
1814 	    "%s, %llu objects%s\n",
1815 	    osname, type, (u_longlong_t)dmu_objset_id(os),
1816 	    (u_longlong_t)dds.dds_creation_txg,
1817 	    numbuf, (u_longlong_t)usedobjs, blkbuf);
1818 
1819 	if (zopt_objects != 0) {
1820 		for (i = 0; i < zopt_objects; i++)
1821 			dump_object(os, zopt_object[i], verbosity,
1822 			    &print_header);
1823 		(void) printf("\n");
1824 		return;
1825 	}
1826 
1827 	if (dump_opt['i'] != 0 || verbosity >= 2)
1828 		dump_intent_log(dmu_objset_zil(os));
1829 
1830 	if (dmu_objset_ds(os) != NULL)
1831 		dump_deadlist(&dmu_objset_ds(os)->ds_deadlist);
1832 
1833 	if (verbosity < 2)
1834 		return;
1835 
1836 	if (BP_IS_HOLE(os->os_rootbp))
1837 		return;
1838 
1839 	dump_object(os, 0, verbosity, &print_header);
1840 	object_count = 0;
1841 	if (DMU_USERUSED_DNODE(os) != NULL &&
1842 	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
1843 		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header);
1844 		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header);
1845 	}
1846 
1847 	object = 0;
1848 	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
1849 		dump_object(os, object, verbosity, &print_header);
1850 		object_count++;
1851 	}
1852 
1853 	ASSERT3U(object_count, ==, usedobjs);
1854 
1855 	(void) printf("\n");
1856 
1857 	if (error != ESRCH) {
1858 		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
1859 		abort();
1860 	}
1861 }
1862 
1863 static void
1864 dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
1865 {
1866 	time_t timestamp = ub->ub_timestamp;
1867 
1868 	(void) printf(header ? header : "");
1869 	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1870 	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1871 	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1872 	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1873 	(void) printf("\ttimestamp = %llu UTC = %s",
1874 	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1875 	if (dump_opt['u'] >= 3) {
1876 		char blkbuf[BP_SPRINTF_LEN];
1877 		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
1878 		(void) printf("\trootbp = %s\n", blkbuf);
1879 	}
1880 	(void) printf(footer ? footer : "");
1881 }
1882 
1883 static void
1884 dump_config(spa_t *spa)
1885 {
1886 	dmu_buf_t *db;
1887 	size_t nvsize = 0;
1888 	int error = 0;
1889 
1890 
1891 	error = dmu_bonus_hold(spa->spa_meta_objset,
1892 	    spa->spa_config_object, FTAG, &db);
1893 
1894 	if (error == 0) {
1895 		nvsize = *(uint64_t *)db->db_data;
1896 		dmu_buf_rele(db, FTAG);
1897 
1898 		(void) printf("\nMOS Configuration:\n");
1899 		dump_packed_nvlist(spa->spa_meta_objset,
1900 		    spa->spa_config_object, (void *)&nvsize, 1);
1901 	} else {
1902 		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
1903 		    (u_longlong_t)spa->spa_config_object, error);
1904 	}
1905 }
1906 
1907 static void
1908 dump_cachefile(const char *cachefile)
1909 {
1910 	int fd;
1911 	struct stat64 statbuf;
1912 	char *buf;
1913 	nvlist_t *config;
1914 
1915 	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
1916 		(void) printf("cannot open '%s': %s\n", cachefile,
1917 		    strerror(errno));
1918 		exit(1);
1919 	}
1920 
1921 	if (fstat64(fd, &statbuf) != 0) {
1922 		(void) printf("failed to stat '%s': %s\n", cachefile,
1923 		    strerror(errno));
1924 		exit(1);
1925 	}
1926 
1927 	if ((buf = malloc(statbuf.st_size)) == NULL) {
1928 		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
1929 		    (u_longlong_t)statbuf.st_size);
1930 		exit(1);
1931 	}
1932 
1933 	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
1934 		(void) fprintf(stderr, "failed to read %llu bytes\n",
1935 		    (u_longlong_t)statbuf.st_size);
1936 		exit(1);
1937 	}
1938 
1939 	(void) close(fd);
1940 
1941 	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
1942 		(void) fprintf(stderr, "failed to unpack nvlist\n");
1943 		exit(1);
1944 	}
1945 
1946 	free(buf);
1947 
1948 	dump_nvlist(config, 0);
1949 
1950 	nvlist_free(config);
1951 }
1952 
1953 #define	ZDB_MAX_UB_HEADER_SIZE 32
1954 
1955 static void
1956 dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
1957 {
1958 	vdev_t vd;
1959 	vdev_t *vdp = &vd;
1960 	char header[ZDB_MAX_UB_HEADER_SIZE];
1961 
1962 	vd.vdev_ashift = ashift;
1963 	vdp->vdev_top = vdp;
1964 
1965 	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
1966 		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
1967 		uberblock_t *ub = (void *)((char *)lbl + uoff);
1968 
1969 		if (uberblock_verify(ub))
1970 			continue;
1971 		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
1972 		    "Uberblock[%d]\n", i);
1973 		dump_uberblock(ub, header, "");
1974 	}
1975 }
1976 
1977 static void
1978 dump_label(const char *dev)
1979 {
1980 	int fd;
1981 	vdev_label_t label;
1982 	char *path, *buf = label.vl_vdev_phys.vp_nvlist;
1983 	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
1984 	struct stat64 statbuf;
1985 	uint64_t psize, ashift;
1986 	int len = strlen(dev) + 1;
1987 
1988 	if (strncmp(dev, "/dev/dsk/", 9) == 0) {
1989 		len++;
1990 		path = malloc(len);
1991 		(void) snprintf(path, len, "%s%s", "/dev/rdsk/", dev + 9);
1992 	} else {
1993 		path = strdup(dev);
1994 	}
1995 
1996 	if ((fd = open64(path, O_RDONLY)) < 0) {
1997 		(void) printf("cannot open '%s': %s\n", path, strerror(errno));
1998 		free(path);
1999 		exit(1);
2000 	}
2001 
2002 	if (fstat64(fd, &statbuf) != 0) {
2003 		(void) printf("failed to stat '%s': %s\n", path,
2004 		    strerror(errno));
2005 		free(path);
2006 		(void) close(fd);
2007 		exit(1);
2008 	}
2009 
2010 	if (S_ISBLK(statbuf.st_mode)) {
2011 		(void) printf("cannot use '%s': character device required\n",
2012 		    path);
2013 		free(path);
2014 		(void) close(fd);
2015 		exit(1);
2016 	}
2017 
2018 	psize = statbuf.st_size;
2019 	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2020 
2021 	for (int l = 0; l < VDEV_LABELS; l++) {
2022 		nvlist_t *config = NULL;
2023 
2024 		(void) printf("--------------------------------------------\n");
2025 		(void) printf("LABEL %d\n", l);
2026 		(void) printf("--------------------------------------------\n");
2027 
2028 		if (pread64(fd, &label, sizeof (label),
2029 		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2030 			(void) printf("failed to read label %d\n", l);
2031 			continue;
2032 		}
2033 
2034 		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2035 			(void) printf("failed to unpack label %d\n", l);
2036 			ashift = SPA_MINBLOCKSHIFT;
2037 		} else {
2038 			nvlist_t *vdev_tree = NULL;
2039 
2040 			dump_nvlist(config, 4);
2041 			if ((nvlist_lookup_nvlist(config,
2042 			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2043 			    (nvlist_lookup_uint64(vdev_tree,
2044 			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2045 				ashift = SPA_MINBLOCKSHIFT;
2046 			nvlist_free(config);
2047 		}
2048 		if (dump_opt['u'])
2049 			dump_label_uberblocks(&label, ashift);
2050 	}
2051 
2052 	free(path);
2053 	(void) close(fd);
2054 }
2055 
2056 /*ARGSUSED*/
2057 static int
2058 dump_one_dir(const char *dsname, void *arg)
2059 {
2060 	int error;
2061 	objset_t *os;
2062 
2063 	error = dmu_objset_own(dsname, DMU_OST_ANY, B_TRUE, FTAG, &os);
2064 	if (error) {
2065 		(void) printf("Could not open %s, error %d\n", dsname, error);
2066 		return (0);
2067 	}
2068 	dump_dir(os);
2069 	dmu_objset_disown(os, FTAG);
2070 	fuid_table_destroy();
2071 	sa_loaded = B_FALSE;
2072 	return (0);
2073 }
2074 
2075 /*
2076  * Block statistics.
2077  */
2078 #define	PSIZE_HISTO_SIZE (SPA_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1)
2079 typedef struct zdb_blkstats {
2080 	uint64_t zb_asize;
2081 	uint64_t zb_lsize;
2082 	uint64_t zb_psize;
2083 	uint64_t zb_count;
2084 	uint64_t zb_gangs;
2085 	uint64_t zb_ditto_samevdev;
2086 	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2087 } zdb_blkstats_t;
2088 
2089 /*
2090  * Extended object types to report deferred frees and dedup auto-ditto blocks.
2091  */
2092 #define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
2093 #define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
2094 #define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
2095 #define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
2096 
2097 static char *zdb_ot_extname[] = {
2098 	"deferred free",
2099 	"dedup ditto",
2100 	"other",
2101 	"Total",
2102 };
2103 
2104 #define	ZB_TOTAL	DN_MAX_LEVELS
2105 
2106 typedef struct zdb_cb {
2107 	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2108 	uint64_t	zcb_dedup_asize;
2109 	uint64_t	zcb_dedup_blocks;
2110 	uint64_t	zcb_start;
2111 	uint64_t	zcb_lastprint;
2112 	uint64_t	zcb_totalasize;
2113 	uint64_t	zcb_errors[256];
2114 	int		zcb_readfails;
2115 	int		zcb_haderrors;
2116 	spa_t		*zcb_spa;
2117 } zdb_cb_t;
2118 
2119 static void
2120 zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2121     dmu_object_type_t type)
2122 {
2123 	uint64_t refcnt = 0;
2124 
2125 	ASSERT(type < ZDB_OT_TOTAL);
2126 
2127 	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2128 		return;
2129 
2130 	for (int i = 0; i < 4; i++) {
2131 		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2132 		int t = (i & 1) ? type : ZDB_OT_TOTAL;
2133 		int equal;
2134 		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2135 
2136 		zb->zb_asize += BP_GET_ASIZE(bp);
2137 		zb->zb_lsize += BP_GET_LSIZE(bp);
2138 		zb->zb_psize += BP_GET_PSIZE(bp);
2139 		zb->zb_count++;
2140 		zb->zb_psize_histogram[BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT]++;
2141 
2142 		zb->zb_gangs += BP_COUNT_GANG(bp);
2143 
2144 		switch (BP_GET_NDVAS(bp)) {
2145 		case 2:
2146 			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2147 			    DVA_GET_VDEV(&bp->blk_dva[1]))
2148 				zb->zb_ditto_samevdev++;
2149 			break;
2150 		case 3:
2151 			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2152 			    DVA_GET_VDEV(&bp->blk_dva[1])) +
2153 			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2154 			    DVA_GET_VDEV(&bp->blk_dva[2])) +
2155 			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2156 			    DVA_GET_VDEV(&bp->blk_dva[2]));
2157 			if (equal != 0)
2158 				zb->zb_ditto_samevdev++;
2159 			break;
2160 		}
2161 
2162 	}
2163 
2164 	if (dump_opt['L'])
2165 		return;
2166 
2167 	if (BP_GET_DEDUP(bp)) {
2168 		ddt_t *ddt;
2169 		ddt_entry_t *dde;
2170 
2171 		ddt = ddt_select(zcb->zcb_spa, bp);
2172 		ddt_enter(ddt);
2173 		dde = ddt_lookup(ddt, bp, B_FALSE);
2174 
2175 		if (dde == NULL) {
2176 			refcnt = 0;
2177 		} else {
2178 			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2179 			ddt_phys_decref(ddp);
2180 			refcnt = ddp->ddp_refcnt;
2181 			if (ddt_phys_total_refcnt(dde) == 0)
2182 				ddt_remove(ddt, dde);
2183 		}
2184 		ddt_exit(ddt);
2185 	}
2186 
2187 	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2188 	    refcnt ? 0 : spa_first_txg(zcb->zcb_spa),
2189 	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2190 }
2191 
2192 static void
2193 zdb_blkptr_done(zio_t *zio)
2194 {
2195 	spa_t *spa = zio->io_spa;
2196 	blkptr_t *bp = zio->io_bp;
2197 	int ioerr = zio->io_error;
2198 	zdb_cb_t *zcb = zio->io_private;
2199 	zbookmark_t *zb = &zio->io_bookmark;
2200 
2201 	zio_data_buf_free(zio->io_data, zio->io_size);
2202 
2203 	mutex_enter(&spa->spa_scrub_lock);
2204 	spa->spa_scrub_inflight--;
2205 	cv_broadcast(&spa->spa_scrub_io_cv);
2206 
2207 	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
2208 		char blkbuf[BP_SPRINTF_LEN];
2209 
2210 		zcb->zcb_haderrors = 1;
2211 		zcb->zcb_errors[ioerr]++;
2212 
2213 		if (dump_opt['b'] >= 2)
2214 			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2215 		else
2216 			blkbuf[0] = '\0';
2217 
2218 		(void) printf("zdb_blkptr_cb: "
2219 		    "Got error %d reading "
2220 		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
2221 		    ioerr,
2222 		    (u_longlong_t)zb->zb_objset,
2223 		    (u_longlong_t)zb->zb_object,
2224 		    (u_longlong_t)zb->zb_level,
2225 		    (u_longlong_t)zb->zb_blkid,
2226 		    blkbuf);
2227 	}
2228 	mutex_exit(&spa->spa_scrub_lock);
2229 }
2230 
2231 static int
2232 zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2233     const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
2234 {
2235 	zdb_cb_t *zcb = arg;
2236 	dmu_object_type_t type;
2237 	boolean_t is_metadata;
2238 
2239 	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
2240 		char blkbuf[BP_SPRINTF_LEN];
2241 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2242 		(void) printf("objset %llu object %llu "
2243 		    "level %lld offset 0x%llx %s\n",
2244 		    (u_longlong_t)zb->zb_objset,
2245 		    (u_longlong_t)zb->zb_object,
2246 		    (longlong_t)zb->zb_level,
2247 		    (u_longlong_t)blkid2offset(dnp, bp, zb),
2248 		    blkbuf);
2249 	}
2250 
2251 	if (BP_IS_HOLE(bp))
2252 		return (0);
2253 
2254 	type = BP_GET_TYPE(bp);
2255 
2256 	zdb_count_block(zcb, zilog, bp,
2257 	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
2258 
2259 	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
2260 
2261 	if (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata)) {
2262 		size_t size = BP_GET_PSIZE(bp);
2263 		void *data = zio_data_buf_alloc(size);
2264 		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
2265 
2266 		/* If it's an intent log block, failure is expected. */
2267 		if (zb->zb_level == ZB_ZIL_LEVEL)
2268 			flags |= ZIO_FLAG_SPECULATIVE;
2269 
2270 		mutex_enter(&spa->spa_scrub_lock);
2271 		while (spa->spa_scrub_inflight > max_inflight)
2272 			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
2273 		spa->spa_scrub_inflight++;
2274 		mutex_exit(&spa->spa_scrub_lock);
2275 
2276 		zio_nowait(zio_read(NULL, spa, bp, data, size,
2277 		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
2278 	}
2279 
2280 	zcb->zcb_readfails = 0;
2281 
2282 	if (dump_opt['b'] < 5 && isatty(STDERR_FILENO) &&
2283 	    gethrtime() > zcb->zcb_lastprint + NANOSEC) {
2284 		uint64_t now = gethrtime();
2285 		char buf[10];
2286 		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
2287 		int kb_per_sec =
2288 		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
2289 		int sec_remaining =
2290 		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
2291 
2292 		zfs_nicenum(bytes, buf, sizeof (buf));
2293 		(void) fprintf(stderr,
2294 		    "\r%5s completed (%4dMB/s) "
2295 		    "estimated time remaining: %uhr %02umin %02usec        ",
2296 		    buf, kb_per_sec / 1024,
2297 		    sec_remaining / 60 / 60,
2298 		    sec_remaining / 60 % 60,
2299 		    sec_remaining % 60);
2300 
2301 		zcb->zcb_lastprint = now;
2302 	}
2303 
2304 	return (0);
2305 }
2306 
2307 static void
2308 zdb_leak(void *arg, uint64_t start, uint64_t size)
2309 {
2310 	vdev_t *vd = arg;
2311 
2312 	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
2313 	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
2314 }
2315 
2316 static metaslab_ops_t zdb_metaslab_ops = {
2317 	NULL,	/* alloc */
2318 	NULL	/* fragmented */
2319 };
2320 
2321 static void
2322 zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
2323 {
2324 	ddt_bookmark_t ddb = { 0 };
2325 	ddt_entry_t dde;
2326 	int error;
2327 
2328 	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
2329 		blkptr_t blk;
2330 		ddt_phys_t *ddp = dde.dde_phys;
2331 
2332 		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
2333 			return;
2334 
2335 		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
2336 
2337 		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
2338 			if (ddp->ddp_phys_birth == 0)
2339 				continue;
2340 			ddt_bp_create(ddb.ddb_checksum,
2341 			    &dde.dde_key, ddp, &blk);
2342 			if (p == DDT_PHYS_DITTO) {
2343 				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
2344 			} else {
2345 				zcb->zcb_dedup_asize +=
2346 				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
2347 				zcb->zcb_dedup_blocks++;
2348 			}
2349 		}
2350 		if (!dump_opt['L']) {
2351 			ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
2352 			ddt_enter(ddt);
2353 			VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
2354 			ddt_exit(ddt);
2355 		}
2356 	}
2357 
2358 	ASSERT(error == ENOENT);
2359 }
2360 
2361 static void
2362 zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
2363 {
2364 	zcb->zcb_spa = spa;
2365 
2366 	if (!dump_opt['L']) {
2367 		vdev_t *rvd = spa->spa_root_vdev;
2368 		for (int c = 0; c < rvd->vdev_children; c++) {
2369 			vdev_t *vd = rvd->vdev_child[c];
2370 			for (int m = 0; m < vd->vdev_ms_count; m++) {
2371 				metaslab_t *msp = vd->vdev_ms[m];
2372 				mutex_enter(&msp->ms_lock);
2373 				metaslab_unload(msp);
2374 
2375 				/*
2376 				 * For leak detection, we overload the metaslab
2377 				 * ms_tree to contain allocated segments
2378 				 * instead of free segments. As a result,
2379 				 * we can't use the normal metaslab_load/unload
2380 				 * interfaces.
2381 				 */
2382 				if (msp->ms_sm != NULL) {
2383 					msp->ms_ops = &zdb_metaslab_ops;
2384 					VERIFY0(space_map_load(msp->ms_sm,
2385 					    msp->ms_tree, SM_ALLOC));
2386 					msp->ms_loaded = B_TRUE;
2387 				}
2388 				mutex_exit(&msp->ms_lock);
2389 			}
2390 		}
2391 	}
2392 
2393 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2394 
2395 	zdb_ddt_leak_init(spa, zcb);
2396 
2397 	spa_config_exit(spa, SCL_CONFIG, FTAG);
2398 }
2399 
2400 static void
2401 zdb_leak_fini(spa_t *spa)
2402 {
2403 	if (!dump_opt['L']) {
2404 		vdev_t *rvd = spa->spa_root_vdev;
2405 		for (int c = 0; c < rvd->vdev_children; c++) {
2406 			vdev_t *vd = rvd->vdev_child[c];
2407 			for (int m = 0; m < vd->vdev_ms_count; m++) {
2408 				metaslab_t *msp = vd->vdev_ms[m];
2409 				mutex_enter(&msp->ms_lock);
2410 
2411 				/*
2412 				 * The ms_tree has been overloaded to
2413 				 * contain allocated segments. Now that we
2414 				 * finished traversing all blocks, any
2415 				 * block that remains in the ms_tree
2416 				 * represents an allocated block that we
2417 				 * did not claim during the traversal.
2418 				 * Claimed blocks would have been removed
2419 				 * from the ms_tree.
2420 				 */
2421 				range_tree_vacate(msp->ms_tree, zdb_leak, vd);
2422 				msp->ms_loaded = B_FALSE;
2423 
2424 				mutex_exit(&msp->ms_lock);
2425 			}
2426 		}
2427 	}
2428 }
2429 
2430 /* ARGSUSED */
2431 static int
2432 count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
2433 {
2434 	zdb_cb_t *zcb = arg;
2435 
2436 	if (dump_opt['b'] >= 5) {
2437 		char blkbuf[BP_SPRINTF_LEN];
2438 		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2439 		(void) printf("[%s] %s\n",
2440 		    "deferred free", blkbuf);
2441 	}
2442 	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
2443 	return (0);
2444 }
2445 
2446 static int
2447 dump_block_stats(spa_t *spa)
2448 {
2449 	zdb_cb_t zcb = { 0 };
2450 	zdb_blkstats_t *zb, *tzb;
2451 	uint64_t norm_alloc, norm_space, total_alloc, total_found;
2452 	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
2453 	int leaks = 0;
2454 
2455 	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
2456 	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
2457 	    (dump_opt['c'] == 1) ? "metadata " : "",
2458 	    dump_opt['c'] ? "checksums " : "",
2459 	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
2460 	    !dump_opt['L'] ? "nothing leaked " : "");
2461 
2462 	/*
2463 	 * Load all space maps as SM_ALLOC maps, then traverse the pool
2464 	 * claiming each block we discover.  If the pool is perfectly
2465 	 * consistent, the space maps will be empty when we're done.
2466 	 * Anything left over is a leak; any block we can't claim (because
2467 	 * it's not part of any space map) is a double allocation,
2468 	 * reference to a freed block, or an unclaimed log block.
2469 	 */
2470 	zdb_leak_init(spa, &zcb);
2471 
2472 	/*
2473 	 * If there's a deferred-free bplist, process that first.
2474 	 */
2475 	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
2476 	    count_block_cb, &zcb, NULL);
2477 	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
2478 		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
2479 		    count_block_cb, &zcb, NULL);
2480 	}
2481 	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
2482 		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
2483 		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
2484 		    &zcb, NULL));
2485 	}
2486 
2487 	if (dump_opt['c'] > 1)
2488 		flags |= TRAVERSE_PREFETCH_DATA;
2489 
2490 	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
2491 	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
2492 	zcb.zcb_haderrors |= traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
2493 
2494 	/*
2495 	 * If we've traversed the data blocks then we need to wait for those
2496 	 * I/Os to complete. We leverage "The Godfather" zio to wait on
2497 	 * all async I/Os to complete.
2498 	 */
2499 	if (dump_opt['c']) {
2500 		(void) zio_wait(spa->spa_async_zio_root);
2501 		spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
2502 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
2503 		    ZIO_FLAG_GODFATHER);
2504 	}
2505 
2506 	if (zcb.zcb_haderrors) {
2507 		(void) printf("\nError counts:\n\n");
2508 		(void) printf("\t%5s  %s\n", "errno", "count");
2509 		for (int e = 0; e < 256; e++) {
2510 			if (zcb.zcb_errors[e] != 0) {
2511 				(void) printf("\t%5d  %llu\n",
2512 				    e, (u_longlong_t)zcb.zcb_errors[e]);
2513 			}
2514 		}
2515 	}
2516 
2517 	/*
2518 	 * Report any leaked segments.
2519 	 */
2520 	zdb_leak_fini(spa);
2521 
2522 	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
2523 
2524 	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
2525 	norm_space = metaslab_class_get_space(spa_normal_class(spa));
2526 
2527 	total_alloc = norm_alloc + metaslab_class_get_alloc(spa_log_class(spa));
2528 	total_found = tzb->zb_asize - zcb.zcb_dedup_asize;
2529 
2530 	if (total_found == total_alloc) {
2531 		if (!dump_opt['L'])
2532 			(void) printf("\n\tNo leaks (block sum matches space"
2533 			    " maps exactly)\n");
2534 	} else {
2535 		(void) printf("block traversal size %llu != alloc %llu "
2536 		    "(%s %lld)\n",
2537 		    (u_longlong_t)total_found,
2538 		    (u_longlong_t)total_alloc,
2539 		    (dump_opt['L']) ? "unreachable" : "leaked",
2540 		    (longlong_t)(total_alloc - total_found));
2541 		leaks = 1;
2542 	}
2543 
2544 	if (tzb->zb_count == 0)
2545 		return (2);
2546 
2547 	(void) printf("\n");
2548 	(void) printf("\tbp count:      %10llu\n",
2549 	    (u_longlong_t)tzb->zb_count);
2550 	(void) printf("\tganged count:  %10llu\n",
2551 	    (longlong_t)tzb->zb_gangs);
2552 	(void) printf("\tbp logical:    %10llu      avg: %6llu\n",
2553 	    (u_longlong_t)tzb->zb_lsize,
2554 	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
2555 	(void) printf("\tbp physical:   %10llu      avg:"
2556 	    " %6llu     compression: %6.2f\n",
2557 	    (u_longlong_t)tzb->zb_psize,
2558 	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
2559 	    (double)tzb->zb_lsize / tzb->zb_psize);
2560 	(void) printf("\tbp allocated:  %10llu      avg:"
2561 	    " %6llu     compression: %6.2f\n",
2562 	    (u_longlong_t)tzb->zb_asize,
2563 	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
2564 	    (double)tzb->zb_lsize / tzb->zb_asize);
2565 	(void) printf("\tbp deduped:    %10llu    ref>1:"
2566 	    " %6llu   deduplication: %6.2f\n",
2567 	    (u_longlong_t)zcb.zcb_dedup_asize,
2568 	    (u_longlong_t)zcb.zcb_dedup_blocks,
2569 	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
2570 	(void) printf("\tSPA allocated: %10llu     used: %5.2f%%\n",
2571 	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
2572 
2573 	if (tzb->zb_ditto_samevdev != 0) {
2574 		(void) printf("\tDittoed blocks on same vdev: %llu\n",
2575 		    (longlong_t)tzb->zb_ditto_samevdev);
2576 	}
2577 
2578 	if (dump_opt['b'] >= 2) {
2579 		int l, t, level;
2580 		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2581 		    "\t  avg\t comp\t%%Total\tType\n");
2582 
2583 		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
2584 			char csize[32], lsize[32], psize[32], asize[32];
2585 			char avg[32], gang[32];
2586 			char *typename;
2587 
2588 			if (t < DMU_OT_NUMTYPES)
2589 				typename = dmu_ot[t].ot_name;
2590 			else
2591 				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
2592 
2593 			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
2594 				(void) printf("%6s\t%5s\t%5s\t%5s"
2595 				    "\t%5s\t%5s\t%6s\t%s\n",
2596 				    "-",
2597 				    "-",
2598 				    "-",
2599 				    "-",
2600 				    "-",
2601 				    "-",
2602 				    "-",
2603 				    typename);
2604 				continue;
2605 			}
2606 
2607 			for (l = ZB_TOTAL - 1; l >= -1; l--) {
2608 				level = (l == -1 ? ZB_TOTAL : l);
2609 				zb = &zcb.zcb_type[level][t];
2610 
2611 				if (zb->zb_asize == 0)
2612 					continue;
2613 
2614 				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
2615 					continue;
2616 
2617 				if (level == 0 && zb->zb_asize ==
2618 				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
2619 					continue;
2620 
2621 				zdb_nicenum(zb->zb_count, csize);
2622 				zdb_nicenum(zb->zb_lsize, lsize);
2623 				zdb_nicenum(zb->zb_psize, psize);
2624 				zdb_nicenum(zb->zb_asize, asize);
2625 				zdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2626 				zdb_nicenum(zb->zb_gangs, gang);
2627 
2628 				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
2629 				    "\t%5.2f\t%6.2f\t",
2630 				    csize, lsize, psize, asize, avg,
2631 				    (double)zb->zb_lsize / zb->zb_psize,
2632 				    100.0 * zb->zb_asize / tzb->zb_asize);
2633 
2634 				if (level == ZB_TOTAL)
2635 					(void) printf("%s\n", typename);
2636 				else
2637 					(void) printf("    L%d %s\n",
2638 					    level, typename);
2639 
2640 				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
2641 					(void) printf("\t number of ganged "
2642 					    "blocks: %s\n", gang);
2643 				}
2644 
2645 				if (dump_opt['b'] >= 4) {
2646 					(void) printf("psize "
2647 					    "(in 512-byte sectors): "
2648 					    "number of blocks\n");
2649 					dump_histogram(zb->zb_psize_histogram,
2650 					    PSIZE_HISTO_SIZE, 0);
2651 				}
2652 			}
2653 		}
2654 	}
2655 
2656 	(void) printf("\n");
2657 
2658 	if (leaks)
2659 		return (2);
2660 
2661 	if (zcb.zcb_haderrors)
2662 		return (3);
2663 
2664 	return (0);
2665 }
2666 
2667 typedef struct zdb_ddt_entry {
2668 	ddt_key_t	zdde_key;
2669 	uint64_t	zdde_ref_blocks;
2670 	uint64_t	zdde_ref_lsize;
2671 	uint64_t	zdde_ref_psize;
2672 	uint64_t	zdde_ref_dsize;
2673 	avl_node_t	zdde_node;
2674 } zdb_ddt_entry_t;
2675 
2676 /* ARGSUSED */
2677 static int
2678 zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2679     const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
2680 {
2681 	avl_tree_t *t = arg;
2682 	avl_index_t where;
2683 	zdb_ddt_entry_t *zdde, zdde_search;
2684 
2685 	if (BP_IS_HOLE(bp))
2686 		return (0);
2687 
2688 	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
2689 		(void) printf("traversing objset %llu, %llu objects, "
2690 		    "%lu blocks so far\n",
2691 		    (u_longlong_t)zb->zb_objset,
2692 		    (u_longlong_t)bp->blk_fill,
2693 		    avl_numnodes(t));
2694 	}
2695 
2696 	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
2697 	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
2698 		return (0);
2699 
2700 	ddt_key_fill(&zdde_search.zdde_key, bp);
2701 
2702 	zdde = avl_find(t, &zdde_search, &where);
2703 
2704 	if (zdde == NULL) {
2705 		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
2706 		zdde->zdde_key = zdde_search.zdde_key;
2707 		avl_insert(t, zdde, where);
2708 	}
2709 
2710 	zdde->zdde_ref_blocks += 1;
2711 	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
2712 	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
2713 	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
2714 
2715 	return (0);
2716 }
2717 
2718 static void
2719 dump_simulated_ddt(spa_t *spa)
2720 {
2721 	avl_tree_t t;
2722 	void *cookie = NULL;
2723 	zdb_ddt_entry_t *zdde;
2724 	ddt_histogram_t ddh_total = { 0 };
2725 	ddt_stat_t dds_total = { 0 };
2726 
2727 	avl_create(&t, ddt_entry_compare,
2728 	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
2729 
2730 	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2731 
2732 	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
2733 	    zdb_ddt_add_cb, &t);
2734 
2735 	spa_config_exit(spa, SCL_CONFIG, FTAG);
2736 
2737 	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
2738 		ddt_stat_t dds;
2739 		uint64_t refcnt = zdde->zdde_ref_blocks;
2740 		ASSERT(refcnt != 0);
2741 
2742 		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
2743 		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
2744 		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
2745 		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
2746 
2747 		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
2748 		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
2749 		dds.dds_ref_psize = zdde->zdde_ref_psize;
2750 		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
2751 
2752 		ddt_stat_add(&ddh_total.ddh_stat[highbit(refcnt) - 1], &dds, 0);
2753 
2754 		umem_free(zdde, sizeof (*zdde));
2755 	}
2756 
2757 	avl_destroy(&t);
2758 
2759 	ddt_histogram_stat(&dds_total, &ddh_total);
2760 
2761 	(void) printf("Simulated DDT histogram:\n");
2762 
2763 	zpool_dump_ddt(&dds_total, &ddh_total);
2764 
2765 	dump_dedup_ratio(&dds_total);
2766 }
2767 
2768 static void
2769 dump_zpool(spa_t *spa)
2770 {
2771 	dsl_pool_t *dp = spa_get_dsl(spa);
2772 	int rc = 0;
2773 
2774 	if (dump_opt['S']) {
2775 		dump_simulated_ddt(spa);
2776 		return;
2777 	}
2778 
2779 	if (!dump_opt['e'] && dump_opt['C'] > 1) {
2780 		(void) printf("\nCached configuration:\n");
2781 		dump_nvlist(spa->spa_config, 8);
2782 	}
2783 
2784 	if (dump_opt['C'])
2785 		dump_config(spa);
2786 
2787 	if (dump_opt['u'])
2788 		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
2789 
2790 	if (dump_opt['D'])
2791 		dump_all_ddts(spa);
2792 
2793 	if (dump_opt['d'] > 2 || dump_opt['m'])
2794 		dump_metaslabs(spa);
2795 
2796 	if (dump_opt['d'] || dump_opt['i']) {
2797 		dump_dir(dp->dp_meta_objset);
2798 		if (dump_opt['d'] >= 3) {
2799 			dump_bpobj(&spa->spa_deferred_bpobj,
2800 			    "Deferred frees", 0);
2801 			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
2802 				dump_bpobj(&spa->spa_dsl_pool->dp_free_bpobj,
2803 				    "Pool snapshot frees", 0);
2804 			}
2805 
2806 			if (spa_feature_is_active(spa,
2807 			    SPA_FEATURE_ASYNC_DESTROY)) {
2808 				dump_bptree(spa->spa_meta_objset,
2809 				    spa->spa_dsl_pool->dp_bptree_obj,
2810 				    "Pool dataset frees");
2811 			}
2812 			dump_dtl(spa->spa_root_vdev, 0);
2813 		}
2814 		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
2815 		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
2816 	}
2817 	if (dump_opt['b'] || dump_opt['c'])
2818 		rc = dump_block_stats(spa);
2819 
2820 	if (rc == 0)
2821 		rc = verify_spacemap_refcounts(spa);
2822 
2823 	if (dump_opt['s'])
2824 		show_pool_stats(spa);
2825 
2826 	if (dump_opt['h'])
2827 		dump_history(spa);
2828 
2829 	if (rc != 0)
2830 		exit(rc);
2831 }
2832 
2833 #define	ZDB_FLAG_CHECKSUM	0x0001
2834 #define	ZDB_FLAG_DECOMPRESS	0x0002
2835 #define	ZDB_FLAG_BSWAP		0x0004
2836 #define	ZDB_FLAG_GBH		0x0008
2837 #define	ZDB_FLAG_INDIRECT	0x0010
2838 #define	ZDB_FLAG_PHYS		0x0020
2839 #define	ZDB_FLAG_RAW		0x0040
2840 #define	ZDB_FLAG_PRINT_BLKPTR	0x0080
2841 
2842 int flagbits[256];
2843 
2844 static void
2845 zdb_print_blkptr(blkptr_t *bp, int flags)
2846 {
2847 	char blkbuf[BP_SPRINTF_LEN];
2848 
2849 	if (flags & ZDB_FLAG_BSWAP)
2850 		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
2851 
2852 	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2853 	(void) printf("%s\n", blkbuf);
2854 }
2855 
2856 static void
2857 zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
2858 {
2859 	int i;
2860 
2861 	for (i = 0; i < nbps; i++)
2862 		zdb_print_blkptr(&bp[i], flags);
2863 }
2864 
2865 static void
2866 zdb_dump_gbh(void *buf, int flags)
2867 {
2868 	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
2869 }
2870 
2871 static void
2872 zdb_dump_block_raw(void *buf, uint64_t size, int flags)
2873 {
2874 	if (flags & ZDB_FLAG_BSWAP)
2875 		byteswap_uint64_array(buf, size);
2876 	(void) write(1, buf, size);
2877 }
2878 
2879 static void
2880 zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
2881 {
2882 	uint64_t *d = (uint64_t *)buf;
2883 	int nwords = size / sizeof (uint64_t);
2884 	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
2885 	int i, j;
2886 	char *hdr, *c;
2887 
2888 
2889 	if (do_bswap)
2890 		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
2891 	else
2892 		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
2893 
2894 	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
2895 
2896 	for (i = 0; i < nwords; i += 2) {
2897 		(void) printf("%06llx:  %016llx  %016llx  ",
2898 		    (u_longlong_t)(i * sizeof (uint64_t)),
2899 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
2900 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
2901 
2902 		c = (char *)&d[i];
2903 		for (j = 0; j < 2 * sizeof (uint64_t); j++)
2904 			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
2905 		(void) printf("\n");
2906 	}
2907 }
2908 
2909 /*
2910  * There are two acceptable formats:
2911  *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
2912  *	child[.child]*    - For example: 0.1.1
2913  *
2914  * The second form can be used to specify arbitrary vdevs anywhere
2915  * in the heirarchy.  For example, in a pool with a mirror of
2916  * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
2917  */
2918 static vdev_t *
2919 zdb_vdev_lookup(vdev_t *vdev, char *path)
2920 {
2921 	char *s, *p, *q;
2922 	int i;
2923 
2924 	if (vdev == NULL)
2925 		return (NULL);
2926 
2927 	/* First, assume the x.x.x.x format */
2928 	i = (int)strtoul(path, &s, 10);
2929 	if (s == path || (s && *s != '.' && *s != '\0'))
2930 		goto name;
2931 	if (i < 0 || i >= vdev->vdev_children)
2932 		return (NULL);
2933 
2934 	vdev = vdev->vdev_child[i];
2935 	if (*s == '\0')
2936 		return (vdev);
2937 	return (zdb_vdev_lookup(vdev, s+1));
2938 
2939 name:
2940 	for (i = 0; i < vdev->vdev_children; i++) {
2941 		vdev_t *vc = vdev->vdev_child[i];
2942 
2943 		if (vc->vdev_path == NULL) {
2944 			vc = zdb_vdev_lookup(vc, path);
2945 			if (vc == NULL)
2946 				continue;
2947 			else
2948 				return (vc);
2949 		}
2950 
2951 		p = strrchr(vc->vdev_path, '/');
2952 		p = p ? p + 1 : vc->vdev_path;
2953 		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
2954 
2955 		if (strcmp(vc->vdev_path, path) == 0)
2956 			return (vc);
2957 		if (strcmp(p, path) == 0)
2958 			return (vc);
2959 		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
2960 			return (vc);
2961 	}
2962 
2963 	return (NULL);
2964 }
2965 
2966 /*
2967  * Read a block from a pool and print it out.  The syntax of the
2968  * block descriptor is:
2969  *
2970  *	pool:vdev_specifier:offset:size[:flags]
2971  *
2972  *	pool           - The name of the pool you wish to read from
2973  *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
2974  *	offset         - offset, in hex, in bytes
2975  *	size           - Amount of data to read, in hex, in bytes
2976  *	flags          - A string of characters specifying options
2977  *		 b: Decode a blkptr at given offset within block
2978  *		*c: Calculate and display checksums
2979  *		 d: Decompress data before dumping
2980  *		 e: Byteswap data before dumping
2981  *		 g: Display data as a gang block header
2982  *		 i: Display as an indirect block
2983  *		 p: Do I/O to physical offset
2984  *		 r: Dump raw data to stdout
2985  *
2986  *              * = not yet implemented
2987  */
2988 static void
2989 zdb_read_block(char *thing, spa_t *spa)
2990 {
2991 	blkptr_t blk, *bp = &blk;
2992 	dva_t *dva = bp->blk_dva;
2993 	int flags = 0;
2994 	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
2995 	zio_t *zio;
2996 	vdev_t *vd;
2997 	void *pbuf, *lbuf, *buf;
2998 	char *s, *p, *dup, *vdev, *flagstr;
2999 	int i, error;
3000 
3001 	dup = strdup(thing);
3002 	s = strtok(dup, ":");
3003 	vdev = s ? s : "";
3004 	s = strtok(NULL, ":");
3005 	offset = strtoull(s ? s : "", NULL, 16);
3006 	s = strtok(NULL, ":");
3007 	size = strtoull(s ? s : "", NULL, 16);
3008 	s = strtok(NULL, ":");
3009 	flagstr = s ? s : "";
3010 
3011 	s = NULL;
3012 	if (size == 0)
3013 		s = "size must not be zero";
3014 	if (!IS_P2ALIGNED(size, DEV_BSIZE))
3015 		s = "size must be a multiple of sector size";
3016 	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
3017 		s = "offset must be a multiple of sector size";
3018 	if (s) {
3019 		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
3020 		free(dup);
3021 		return;
3022 	}
3023 
3024 	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
3025 		for (i = 0; flagstr[i]; i++) {
3026 			int bit = flagbits[(uchar_t)flagstr[i]];
3027 
3028 			if (bit == 0) {
3029 				(void) printf("***Invalid flag: %c\n",
3030 				    flagstr[i]);
3031 				continue;
3032 			}
3033 			flags |= bit;
3034 
3035 			/* If it's not something with an argument, keep going */
3036 			if ((bit & (ZDB_FLAG_CHECKSUM |
3037 			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
3038 				continue;
3039 
3040 			p = &flagstr[i + 1];
3041 			if (bit == ZDB_FLAG_PRINT_BLKPTR)
3042 				blkptr_offset = strtoull(p, &p, 16);
3043 			if (*p != ':' && *p != '\0') {
3044 				(void) printf("***Invalid flag arg: '%s'\n", s);
3045 				free(dup);
3046 				return;
3047 			}
3048 		}
3049 	}
3050 
3051 	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
3052 	if (vd == NULL) {
3053 		(void) printf("***Invalid vdev: %s\n", vdev);
3054 		free(dup);
3055 		return;
3056 	} else {
3057 		if (vd->vdev_path)
3058 			(void) fprintf(stderr, "Found vdev: %s\n",
3059 			    vd->vdev_path);
3060 		else
3061 			(void) fprintf(stderr, "Found vdev type: %s\n",
3062 			    vd->vdev_ops->vdev_op_type);
3063 	}
3064 
3065 	psize = size;
3066 	lsize = size;
3067 
3068 	pbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3069 	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3070 
3071 	BP_ZERO(bp);
3072 
3073 	DVA_SET_VDEV(&dva[0], vd->vdev_id);
3074 	DVA_SET_OFFSET(&dva[0], offset);
3075 	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
3076 	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
3077 
3078 	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
3079 
3080 	BP_SET_LSIZE(bp, lsize);
3081 	BP_SET_PSIZE(bp, psize);
3082 	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
3083 	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
3084 	BP_SET_TYPE(bp, DMU_OT_NONE);
3085 	BP_SET_LEVEL(bp, 0);
3086 	BP_SET_DEDUP(bp, 0);
3087 	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
3088 
3089 	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
3090 	zio = zio_root(spa, NULL, NULL, 0);
3091 
3092 	if (vd == vd->vdev_top) {
3093 		/*
3094 		 * Treat this as a normal block read.
3095 		 */
3096 		zio_nowait(zio_read(zio, spa, bp, pbuf, psize, NULL, NULL,
3097 		    ZIO_PRIORITY_SYNC_READ,
3098 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
3099 	} else {
3100 		/*
3101 		 * Treat this as a vdev child I/O.
3102 		 */
3103 		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pbuf, psize,
3104 		    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
3105 		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
3106 		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
3107 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL, NULL));
3108 	}
3109 
3110 	error = zio_wait(zio);
3111 	spa_config_exit(spa, SCL_STATE, FTAG);
3112 
3113 	if (error) {
3114 		(void) printf("Read of %s failed, error: %d\n", thing, error);
3115 		goto out;
3116 	}
3117 
3118 	if (flags & ZDB_FLAG_DECOMPRESS) {
3119 		/*
3120 		 * We don't know how the data was compressed, so just try
3121 		 * every decompress function at every inflated blocksize.
3122 		 */
3123 		enum zio_compress c;
3124 		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3125 		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3126 
3127 		bcopy(pbuf, pbuf2, psize);
3128 
3129 		VERIFY(random_get_pseudo_bytes((uint8_t *)pbuf + psize,
3130 		    SPA_MAXBLOCKSIZE - psize) == 0);
3131 
3132 		VERIFY(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
3133 		    SPA_MAXBLOCKSIZE - psize) == 0);
3134 
3135 		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
3136 		    lsize -= SPA_MINBLOCKSIZE) {
3137 			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
3138 				if (zio_decompress_data(c, pbuf, lbuf,
3139 				    psize, lsize) == 0 &&
3140 				    zio_decompress_data(c, pbuf2, lbuf2,
3141 				    psize, lsize) == 0 &&
3142 				    bcmp(lbuf, lbuf2, lsize) == 0)
3143 					break;
3144 			}
3145 			if (c != ZIO_COMPRESS_FUNCTIONS)
3146 				break;
3147 			lsize -= SPA_MINBLOCKSIZE;
3148 		}
3149 
3150 		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
3151 		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
3152 
3153 		if (lsize <= psize) {
3154 			(void) printf("Decompress of %s failed\n", thing);
3155 			goto out;
3156 		}
3157 		buf = lbuf;
3158 		size = lsize;
3159 	} else {
3160 		buf = pbuf;
3161 		size = psize;
3162 	}
3163 
3164 	if (flags & ZDB_FLAG_PRINT_BLKPTR)
3165 		zdb_print_blkptr((blkptr_t *)(void *)
3166 		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
3167 	else if (flags & ZDB_FLAG_RAW)
3168 		zdb_dump_block_raw(buf, size, flags);
3169 	else if (flags & ZDB_FLAG_INDIRECT)
3170 		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
3171 		    flags);
3172 	else if (flags & ZDB_FLAG_GBH)
3173 		zdb_dump_gbh(buf, flags);
3174 	else
3175 		zdb_dump_block(thing, buf, size, flags);
3176 
3177 out:
3178 	umem_free(pbuf, SPA_MAXBLOCKSIZE);
3179 	umem_free(lbuf, SPA_MAXBLOCKSIZE);
3180 	free(dup);
3181 }
3182 
3183 static boolean_t
3184 pool_match(nvlist_t *cfg, char *tgt)
3185 {
3186 	uint64_t v, guid = strtoull(tgt, NULL, 0);
3187 	char *s;
3188 
3189 	if (guid != 0) {
3190 		if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0)
3191 			return (v == guid);
3192 	} else {
3193 		if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0)
3194 			return (strcmp(s, tgt) == 0);
3195 	}
3196 	return (B_FALSE);
3197 }
3198 
3199 static char *
3200 find_zpool(char **target, nvlist_t **configp, int dirc, char **dirv)
3201 {
3202 	nvlist_t *pools;
3203 	nvlist_t *match = NULL;
3204 	char *name = NULL;
3205 	char *sepp = NULL;
3206 	char sep;
3207 	int count = 0;
3208 	importargs_t args = { 0 };
3209 
3210 	args.paths = dirc;
3211 	args.path = dirv;
3212 	args.can_be_active = B_TRUE;
3213 
3214 	if ((sepp = strpbrk(*target, "/@")) != NULL) {
3215 		sep = *sepp;
3216 		*sepp = '\0';
3217 	}
3218 
3219 	pools = zpool_search_import(g_zfs, &args);
3220 
3221 	if (pools != NULL) {
3222 		nvpair_t *elem = NULL;
3223 		while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) {
3224 			verify(nvpair_value_nvlist(elem, configp) == 0);
3225 			if (pool_match(*configp, *target)) {
3226 				count++;
3227 				if (match != NULL) {
3228 					/* print previously found config */
3229 					if (name != NULL) {
3230 						(void) printf("%s\n", name);
3231 						dump_nvlist(match, 8);
3232 						name = NULL;
3233 					}
3234 					(void) printf("%s\n",
3235 					    nvpair_name(elem));
3236 					dump_nvlist(*configp, 8);
3237 				} else {
3238 					match = *configp;
3239 					name = nvpair_name(elem);
3240 				}
3241 			}
3242 		}
3243 	}
3244 	if (count > 1)
3245 		(void) fatal("\tMatched %d pools - use pool GUID "
3246 		    "instead of pool name or \n"
3247 		    "\tpool name part of a dataset name to select pool", count);
3248 
3249 	if (sepp)
3250 		*sepp = sep;
3251 	/*
3252 	 * If pool GUID was specified for pool id, replace it with pool name
3253 	 */
3254 	if (name && (strstr(*target, name) != *target)) {
3255 		int sz = 1 + strlen(name) + ((sepp) ? strlen(sepp) : 0);
3256 
3257 		*target = umem_alloc(sz, UMEM_NOFAIL);
3258 		(void) snprintf(*target, sz, "%s%s", name, sepp ? sepp : "");
3259 	}
3260 
3261 	*configp = name ? match : NULL;
3262 
3263 	return (name);
3264 }
3265 
3266 int
3267 main(int argc, char **argv)
3268 {
3269 	int i, c;
3270 	struct rlimit rl = { 1024, 1024 };
3271 	spa_t *spa = NULL;
3272 	objset_t *os = NULL;
3273 	int dump_all = 1;
3274 	int verbose = 0;
3275 	int error = 0;
3276 	char **searchdirs = NULL;
3277 	int nsearch = 0;
3278 	char *target;
3279 	nvlist_t *policy = NULL;
3280 	uint64_t max_txg = UINT64_MAX;
3281 	int rewind = ZPOOL_NEVER_REWIND;
3282 
3283 	(void) setrlimit(RLIMIT_NOFILE, &rl);
3284 	(void) enable_extended_FILE_stdio(-1, -1);
3285 
3286 	dprintf_setup(&argc, argv);
3287 
3288 	while ((c = getopt(argc, argv, "bcdhilmM:suCDRSAFLXevp:t:U:P")) != -1) {
3289 		switch (c) {
3290 		case 'b':
3291 		case 'c':
3292 		case 'd':
3293 		case 'h':
3294 		case 'i':
3295 		case 'l':
3296 		case 'm':
3297 		case 's':
3298 		case 'u':
3299 		case 'C':
3300 		case 'D':
3301 		case 'R':
3302 		case 'S':
3303 			dump_opt[c]++;
3304 			dump_all = 0;
3305 			break;
3306 		case 'A':
3307 		case 'F':
3308 		case 'L':
3309 		case 'X':
3310 		case 'e':
3311 		case 'P':
3312 			dump_opt[c]++;
3313 			break;
3314 		case 'v':
3315 			verbose++;
3316 			break;
3317 		case 'M':
3318 			max_inflight = strtoull(optarg, NULL, 0);
3319 			if (max_inflight == 0) {
3320 				(void) fprintf(stderr, "maximum number "
3321 				    "of inflight I/Os must be greater "
3322 				    "than 0\n");
3323 				usage();
3324 			}
3325 			break;
3326 		case 'p':
3327 			if (searchdirs == NULL) {
3328 				searchdirs = umem_alloc(sizeof (char *),
3329 				    UMEM_NOFAIL);
3330 			} else {
3331 				char **tmp = umem_alloc((nsearch + 1) *
3332 				    sizeof (char *), UMEM_NOFAIL);
3333 				bcopy(searchdirs, tmp, nsearch *
3334 				    sizeof (char *));
3335 				umem_free(searchdirs,
3336 				    nsearch * sizeof (char *));
3337 				searchdirs = tmp;
3338 			}
3339 			searchdirs[nsearch++] = optarg;
3340 			break;
3341 		case 't':
3342 			max_txg = strtoull(optarg, NULL, 0);
3343 			if (max_txg < TXG_INITIAL) {
3344 				(void) fprintf(stderr, "incorrect txg "
3345 				    "specified: %s\n", optarg);
3346 				usage();
3347 			}
3348 			break;
3349 		case 'U':
3350 			spa_config_path = optarg;
3351 			break;
3352 		default:
3353 			usage();
3354 			break;
3355 		}
3356 	}
3357 
3358 	if (!dump_opt['e'] && searchdirs != NULL) {
3359 		(void) fprintf(stderr, "-p option requires use of -e\n");
3360 		usage();
3361 	}
3362 
3363 	kernel_init(FREAD);
3364 	g_zfs = libzfs_init();
3365 	ASSERT(g_zfs != NULL);
3366 
3367 	if (dump_all)
3368 		verbose = MAX(verbose, 1);
3369 
3370 	for (c = 0; c < 256; c++) {
3371 		if (dump_all && !strchr("elAFLRSXP", c))
3372 			dump_opt[c] = 1;
3373 		if (dump_opt[c])
3374 			dump_opt[c] += verbose;
3375 	}
3376 
3377 	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
3378 	zfs_recover = (dump_opt['A'] > 1);
3379 
3380 	argc -= optind;
3381 	argv += optind;
3382 
3383 	if (argc < 2 && dump_opt['R'])
3384 		usage();
3385 	if (argc < 1) {
3386 		if (!dump_opt['e'] && dump_opt['C']) {
3387 			dump_cachefile(spa_config_path);
3388 			return (0);
3389 		}
3390 		usage();
3391 	}
3392 
3393 	if (dump_opt['l']) {
3394 		dump_label(argv[0]);
3395 		return (0);
3396 	}
3397 
3398 	if (dump_opt['X'] || dump_opt['F'])
3399 		rewind = ZPOOL_DO_REWIND |
3400 		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
3401 
3402 	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
3403 	    nvlist_add_uint64(policy, ZPOOL_REWIND_REQUEST_TXG, max_txg) != 0 ||
3404 	    nvlist_add_uint32(policy, ZPOOL_REWIND_REQUEST, rewind) != 0)
3405 		fatal("internal error: %s", strerror(ENOMEM));
3406 
3407 	error = 0;
3408 	target = argv[0];
3409 
3410 	if (dump_opt['e']) {
3411 		nvlist_t *cfg = NULL;
3412 		char *name = find_zpool(&target, &cfg, nsearch, searchdirs);
3413 
3414 		error = ENOENT;
3415 		if (name) {
3416 			if (dump_opt['C'] > 1) {
3417 				(void) printf("\nConfiguration for import:\n");
3418 				dump_nvlist(cfg, 8);
3419 			}
3420 			if (nvlist_add_nvlist(cfg,
3421 			    ZPOOL_REWIND_POLICY, policy) != 0) {
3422 				fatal("can't open '%s': %s",
3423 				    target, strerror(ENOMEM));
3424 			}
3425 			if ((error = spa_import(name, cfg, NULL,
3426 			    ZFS_IMPORT_MISSING_LOG)) != 0) {
3427 				error = spa_import(name, cfg, NULL,
3428 				    ZFS_IMPORT_VERBATIM);
3429 			}
3430 		}
3431 	}
3432 
3433 	if (error == 0) {
3434 		if (strpbrk(target, "/@") == NULL || dump_opt['R']) {
3435 			error = spa_open_rewind(target, &spa, FTAG, policy,
3436 			    NULL);
3437 			if (error) {
3438 				/*
3439 				 * If we're missing the log device then
3440 				 * try opening the pool after clearing the
3441 				 * log state.
3442 				 */
3443 				mutex_enter(&spa_namespace_lock);
3444 				if ((spa = spa_lookup(target)) != NULL &&
3445 				    spa->spa_log_state == SPA_LOG_MISSING) {
3446 					spa->spa_log_state = SPA_LOG_CLEAR;
3447 					error = 0;
3448 				}
3449 				mutex_exit(&spa_namespace_lock);
3450 
3451 				if (!error) {
3452 					error = spa_open_rewind(target, &spa,
3453 					    FTAG, policy, NULL);
3454 				}
3455 			}
3456 		} else {
3457 			error = dmu_objset_own(target, DMU_OST_ANY,
3458 			    B_TRUE, FTAG, &os);
3459 		}
3460 	}
3461 	nvlist_free(policy);
3462 
3463 	if (error)
3464 		fatal("can't open '%s': %s", target, strerror(error));
3465 
3466 	argv++;
3467 	argc--;
3468 	if (!dump_opt['R']) {
3469 		if (argc > 0) {
3470 			zopt_objects = argc;
3471 			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
3472 			for (i = 0; i < zopt_objects; i++) {
3473 				errno = 0;
3474 				zopt_object[i] = strtoull(argv[i], NULL, 0);
3475 				if (zopt_object[i] == 0 && errno != 0)
3476 					fatal("bad number %s: %s",
3477 					    argv[i], strerror(errno));
3478 			}
3479 		}
3480 		if (os != NULL) {
3481 			dump_dir(os);
3482 		} else if (zopt_objects > 0 && !dump_opt['m']) {
3483 			dump_dir(spa->spa_meta_objset);
3484 		} else {
3485 			dump_zpool(spa);
3486 		}
3487 	} else {
3488 		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
3489 		flagbits['c'] = ZDB_FLAG_CHECKSUM;
3490 		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
3491 		flagbits['e'] = ZDB_FLAG_BSWAP;
3492 		flagbits['g'] = ZDB_FLAG_GBH;
3493 		flagbits['i'] = ZDB_FLAG_INDIRECT;
3494 		flagbits['p'] = ZDB_FLAG_PHYS;
3495 		flagbits['r'] = ZDB_FLAG_RAW;
3496 
3497 		for (i = 0; i < argc; i++)
3498 			zdb_read_block(argv[i], spa);
3499 	}
3500 
3501 	(os != NULL) ? dmu_objset_disown(os, FTAG) : spa_close(spa, FTAG);
3502 
3503 	fuid_table_destroy();
3504 	sa_loaded = B_FALSE;
3505 
3506 	libzfs_fini(g_zfs);
3507 	kernel_fini();
3508 
3509 	return (0);
3510 }
3511