xref: /illumos-gate/usr/src/cmd/zdb/zdb.c (revision e81c57b154a93e76828db416c371f9683b271c08)
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  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 #include <stdio.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/vdev.h>
40 #include <sys/vdev_impl.h>
41 #include <sys/metaslab_impl.h>
42 #include <sys/dmu_objset.h>
43 #include <sys/dsl_dir.h>
44 #include <sys/dsl_dataset.h>
45 #include <sys/dsl_pool.h>
46 #include <sys/dbuf.h>
47 #include <sys/zil.h>
48 #include <sys/zil_impl.h>
49 #include <sys/stat.h>
50 #include <sys/resource.h>
51 #include <sys/dmu_traverse.h>
52 #include <sys/zio_checksum.h>
53 #include <sys/zio_compress.h>
54 
55 const char cmdname[] = "zdb";
56 uint8_t dump_opt[256];
57 
58 typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
59 
60 extern void dump_intent_log(zilog_t *);
61 uint64_t *zopt_object = NULL;
62 int zopt_objects = 0;
63 int zdb_advance = ADVANCE_PRE;
64 zbookmark_t zdb_noread = { 0, 0, ZB_NO_LEVEL, 0 };
65 
66 /*
67  * These libumem hooks provide a reasonable set of defaults for the allocator's
68  * debugging facilities.
69  */
70 const char *
71 _umem_debug_init()
72 {
73 	return ("default,verbose"); /* $UMEM_DEBUG setting */
74 }
75 
76 const char *
77 _umem_logging_init(void)
78 {
79 	return ("fail,contents"); /* $UMEM_LOGGING setting */
80 }
81 
82 static void
83 usage(void)
84 {
85 	(void) fprintf(stderr,
86 	    "Usage: %s [-udibcsvLU] [-O order] [-B os:obj:level:blkid] "
87 	    "dataset [object...]\n"
88 	    "       %s -C [pool]\n"
89 	    "       %s -l dev\n"
90 	    "       %s -R vdev:offset:size:flags\n",
91 	    cmdname, cmdname, cmdname, cmdname);
92 
93 	(void) fprintf(stderr, "	-u uberblock\n");
94 	(void) fprintf(stderr, "	-d datasets\n");
95 	(void) fprintf(stderr, "        -C cached pool configuration\n");
96 	(void) fprintf(stderr, "	-i intent logs\n");
97 	(void) fprintf(stderr, "	-b block statistics\n");
98 	(void) fprintf(stderr, "	-c checksum all data blocks\n");
99 	(void) fprintf(stderr, "	-s report stats on zdb's I/O\n");
100 	(void) fprintf(stderr, "	-v verbose (applies to all others)\n");
101 	(void) fprintf(stderr, "        -l dump label contents\n");
102 	(void) fprintf(stderr, "	-L live pool (allows some errors)\n");
103 	(void) fprintf(stderr, "	-O [!]<pre|post|prune|data|holes> "
104 	    "visitation order\n");
105 	(void) fprintf(stderr, "	-U use zpool.cache in /tmp\n");
106 	(void) fprintf(stderr, "	-B objset:object:level:blkid -- "
107 	    "simulate bad block\n");
108 	(void) fprintf(stderr, "        -R read and display block from a"
109 	    "device\n");
110 	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
111 	    "to make only that option verbose\n");
112 	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
113 	exit(1);
114 }
115 
116 static void
117 fatal(const char *fmt, ...)
118 {
119 	va_list ap;
120 
121 	va_start(ap, fmt);
122 	(void) fprintf(stderr, "%s: ", cmdname);
123 	(void) vfprintf(stderr, fmt, ap);
124 	va_end(ap);
125 	(void) fprintf(stderr, "\n");
126 
127 	exit(1);
128 }
129 
130 static void
131 dump_nvlist(nvlist_t *list, int indent)
132 {
133 	nvpair_t *elem = NULL;
134 
135 	while ((elem = nvlist_next_nvpair(list, elem)) != NULL) {
136 		switch (nvpair_type(elem)) {
137 		case DATA_TYPE_STRING:
138 			{
139 				char *value;
140 
141 				VERIFY(nvpair_value_string(elem, &value) == 0);
142 				(void) printf("%*s%s='%s'\n", indent, "",
143 				    nvpair_name(elem), value);
144 			}
145 			break;
146 
147 		case DATA_TYPE_UINT64:
148 			{
149 				uint64_t value;
150 
151 				VERIFY(nvpair_value_uint64(elem, &value) == 0);
152 				(void) printf("%*s%s=%llu\n", indent, "",
153 				    nvpair_name(elem), (u_longlong_t)value);
154 			}
155 			break;
156 
157 		case DATA_TYPE_NVLIST:
158 			{
159 				nvlist_t *value;
160 
161 				VERIFY(nvpair_value_nvlist(elem, &value) == 0);
162 				(void) printf("%*s%s\n", indent, "",
163 				    nvpair_name(elem));
164 				dump_nvlist(value, indent + 4);
165 			}
166 			break;
167 
168 		case DATA_TYPE_NVLIST_ARRAY:
169 			{
170 				nvlist_t **value;
171 				uint_t c, count;
172 
173 				VERIFY(nvpair_value_nvlist_array(elem, &value,
174 				    &count) == 0);
175 
176 				for (c = 0; c < count; c++) {
177 					(void) printf("%*s%s[%u]\n", indent, "",
178 					    nvpair_name(elem), c);
179 					dump_nvlist(value[c], indent + 8);
180 				}
181 			}
182 			break;
183 
184 		default:
185 
186 			(void) printf("bad config type %d for %s\n",
187 			    nvpair_type(elem), nvpair_name(elem));
188 		}
189 	}
190 }
191 
192 /* ARGSUSED */
193 static void
194 dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
195 {
196 	nvlist_t *nv;
197 	size_t nvsize = *(uint64_t *)data;
198 	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
199 
200 	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed));
201 
202 	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
203 
204 	umem_free(packed, nvsize);
205 
206 	dump_nvlist(nv, 8);
207 
208 	nvlist_free(nv);
209 }
210 
211 const char dump_zap_stars[] = "****************************************";
212 const int dump_zap_width = sizeof (dump_zap_stars) - 1;
213 
214 static void
215 dump_zap_histogram(uint64_t histo[ZAP_HISTOGRAM_SIZE])
216 {
217 	int i;
218 	int minidx = ZAP_HISTOGRAM_SIZE - 1;
219 	int maxidx = 0;
220 	uint64_t max = 0;
221 
222 	for (i = 0; i < ZAP_HISTOGRAM_SIZE; i++) {
223 		if (histo[i] > max)
224 			max = histo[i];
225 		if (histo[i] > 0 && i > maxidx)
226 			maxidx = i;
227 		if (histo[i] > 0 && i < minidx)
228 			minidx = i;
229 	}
230 
231 	if (max < dump_zap_width)
232 		max = dump_zap_width;
233 
234 	for (i = minidx; i <= maxidx; i++)
235 		(void) printf("\t\t\t%u: %6llu %s\n", i, (u_longlong_t)histo[i],
236 		    &dump_zap_stars[(max - histo[i]) * dump_zap_width / max]);
237 }
238 
239 static void
240 dump_zap_stats(objset_t *os, uint64_t object)
241 {
242 	int error;
243 	zap_stats_t zs;
244 
245 	error = zap_get_stats(os, object, &zs);
246 	if (error)
247 		return;
248 
249 	if (zs.zs_ptrtbl_len == 0) {
250 		ASSERT(zs.zs_num_blocks == 1);
251 		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
252 		    (u_longlong_t)zs.zs_blocksize,
253 		    (u_longlong_t)zs.zs_num_entries);
254 		return;
255 	}
256 
257 	(void) printf("\tFat ZAP stats:\n");
258 
259 	(void) printf("\t\tPointer table:\n");
260 	(void) printf("\t\t\t%llu elements\n",
261 	    (u_longlong_t)zs.zs_ptrtbl_len);
262 	(void) printf("\t\t\tzt_blk: %llu\n",
263 	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
264 	(void) printf("\t\t\tzt_numblks: %llu\n",
265 	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
266 	(void) printf("\t\t\tzt_shift: %llu\n",
267 	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
268 	(void) printf("\t\t\tzt_blks_copied: %llu\n",
269 	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
270 	(void) printf("\t\t\tzt_nextblk: %llu\n",
271 	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
272 
273 	(void) printf("\t\tZAP entries: %llu\n",
274 	    (u_longlong_t)zs.zs_num_entries);
275 	(void) printf("\t\tLeaf blocks: %llu\n",
276 	    (u_longlong_t)zs.zs_num_leafs);
277 	(void) printf("\t\tTotal blocks: %llu\n",
278 	    (u_longlong_t)zs.zs_num_blocks);
279 	(void) printf("\t\tzap_block_type: 0x%llx\n",
280 	    (u_longlong_t)zs.zs_block_type);
281 	(void) printf("\t\tzap_magic: 0x%llx\n",
282 	    (u_longlong_t)zs.zs_magic);
283 	(void) printf("\t\tzap_salt: 0x%llx\n",
284 	    (u_longlong_t)zs.zs_salt);
285 
286 	(void) printf("\t\tLeafs with 2^n pointers:\n");
287 	dump_zap_histogram(zs.zs_leafs_with_2n_pointers);
288 
289 	(void) printf("\t\tBlocks with n*5 entries:\n");
290 	dump_zap_histogram(zs.zs_blocks_with_n5_entries);
291 
292 	(void) printf("\t\tBlocks n/10 full:\n");
293 	dump_zap_histogram(zs.zs_blocks_n_tenths_full);
294 
295 	(void) printf("\t\tEntries with n chunks:\n");
296 	dump_zap_histogram(zs.zs_entries_using_n_chunks);
297 
298 	(void) printf("\t\tBuckets with n entries:\n");
299 	dump_zap_histogram(zs.zs_buckets_with_n_entries);
300 }
301 
302 /*ARGSUSED*/
303 static void
304 dump_none(objset_t *os, uint64_t object, void *data, size_t size)
305 {
306 }
307 
308 /*ARGSUSED*/
309 void
310 dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
311 {
312 }
313 
314 /*ARGSUSED*/
315 static void
316 dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
317 {
318 }
319 
320 /*ARGSUSED*/
321 static void
322 dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
323 {
324 	zap_cursor_t zc;
325 	zap_attribute_t attr;
326 	void *prop;
327 	int i;
328 
329 	dump_zap_stats(os, object);
330 	(void) printf("\n");
331 
332 	for (zap_cursor_init(&zc, os, object);
333 	    zap_cursor_retrieve(&zc, &attr) == 0;
334 	    zap_cursor_advance(&zc)) {
335 		(void) printf("\t\t%s = ", attr.za_name);
336 		if (attr.za_num_integers == 0) {
337 			(void) printf("\n");
338 			continue;
339 		}
340 		prop = umem_zalloc(attr.za_num_integers *
341 		    attr.za_integer_length, UMEM_NOFAIL);
342 		(void) zap_lookup(os, object, attr.za_name,
343 		    attr.za_integer_length, attr.za_num_integers, prop);
344 		if (attr.za_integer_length == 1) {
345 			(void) printf("%s", (char *)prop);
346 		} else {
347 			for (i = 0; i < attr.za_num_integers; i++) {
348 				switch (attr.za_integer_length) {
349 				case 2:
350 					(void) printf("%u ",
351 					    ((uint16_t *)prop)[i]);
352 					break;
353 				case 4:
354 					(void) printf("%u ",
355 					    ((uint32_t *)prop)[i]);
356 					break;
357 				case 8:
358 					(void) printf("%lld ",
359 					    (u_longlong_t)((int64_t *)prop)[i]);
360 					break;
361 				}
362 			}
363 		}
364 		(void) printf("\n");
365 		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
366 	}
367 	zap_cursor_fini(&zc);
368 }
369 
370 static void
371 dump_spacemap(objset_t *os, space_map_obj_t *smo, space_map_t *sm)
372 {
373 	uint64_t alloc, offset, entry;
374 	uint8_t mapshift = sm->sm_shift;
375 	uint64_t mapstart = sm->sm_start;
376 	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID" };
377 
378 	if (smo->smo_object == 0)
379 		return;
380 
381 	/*
382 	 * Print out the freelist entries in both encoded and decoded form.
383 	 */
384 	alloc = 0;
385 	for (offset = 0; offset < smo->smo_objsize; offset += sizeof (entry)) {
386 		VERIFY(0 == dmu_read(os, smo->smo_object, offset,
387 		    sizeof (entry), &entry));
388 		if (SM_DEBUG_DECODE(entry)) {
389 			(void) printf("\t\t[%4llu] %s: txg %llu, pass %llu\n",
390 			    (u_longlong_t)(offset / sizeof (entry)),
391 			    ddata[SM_DEBUG_ACTION_DECODE(entry)],
392 			    (u_longlong_t)SM_DEBUG_TXG_DECODE(entry),
393 			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(entry));
394 		} else {
395 			(void) printf("\t\t[%4llu]    %c  range:"
396 			    " %08llx-%08llx  size: %06llx\n",
397 			    (u_longlong_t)(offset / sizeof (entry)),
398 			    SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
399 			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
400 			    mapshift) + mapstart),
401 			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
402 			    mapshift) + mapstart + (SM_RUN_DECODE(entry) <<
403 			    mapshift)),
404 			    (u_longlong_t)(SM_RUN_DECODE(entry) << mapshift));
405 			if (SM_TYPE_DECODE(entry) == SM_ALLOC)
406 				alloc += SM_RUN_DECODE(entry) << mapshift;
407 			else
408 				alloc -= SM_RUN_DECODE(entry) << mapshift;
409 		}
410 	}
411 	if (alloc != smo->smo_alloc) {
412 		(void) printf("space_map_object alloc (%llu) INCONSISTENT "
413 		    "with space map summary (%llu)\n",
414 		    (u_longlong_t)smo->smo_alloc, (u_longlong_t)alloc);
415 	}
416 }
417 
418 static void
419 dump_metaslab(metaslab_t *msp)
420 {
421 	char freebuf[5];
422 	space_map_obj_t *smo = &msp->ms_smo;
423 	vdev_t *vd = msp->ms_group->mg_vd;
424 	spa_t *spa = vd->vdev_spa;
425 
426 	nicenum(msp->ms_map.sm_size - smo->smo_alloc, freebuf);
427 
428 	if (dump_opt['d'] <= 5) {
429 		(void) printf("\t%10llx   %10llu   %5s\n",
430 		    (u_longlong_t)msp->ms_map.sm_start,
431 		    (u_longlong_t)smo->smo_object,
432 		    freebuf);
433 		return;
434 	}
435 
436 	(void) printf(
437 	    "\tvdev %llu   offset %08llx   spacemap %4llu   free %5s\n",
438 	    (u_longlong_t)vd->vdev_id, (u_longlong_t)msp->ms_map.sm_start,
439 	    (u_longlong_t)smo->smo_object, freebuf);
440 
441 	ASSERT(msp->ms_map.sm_size == (1ULL << vd->vdev_ms_shift));
442 
443 	dump_spacemap(spa->spa_meta_objset, smo, &msp->ms_map);
444 }
445 
446 static void
447 dump_metaslabs(spa_t *spa)
448 {
449 	vdev_t *rvd = spa->spa_root_vdev;
450 	vdev_t *vd;
451 	int c, m;
452 
453 	(void) printf("\nMetaslabs:\n");
454 
455 	for (c = 0; c < rvd->vdev_children; c++) {
456 		vd = rvd->vdev_child[c];
457 
458 		spa_config_enter(spa, RW_READER, FTAG);
459 		(void) printf("\n    vdev %llu = %s\n\n",
460 		    (u_longlong_t)vd->vdev_id, vdev_description(vd));
461 		spa_config_exit(spa, FTAG);
462 
463 		if (dump_opt['d'] <= 5) {
464 			(void) printf("\t%10s   %10s   %5s\n",
465 			    "offset", "spacemap", "free");
466 			(void) printf("\t%10s   %10s   %5s\n",
467 			    "------", "--------", "----");
468 		}
469 		for (m = 0; m < vd->vdev_ms_count; m++)
470 			dump_metaslab(vd->vdev_ms[m]);
471 		(void) printf("\n");
472 	}
473 }
474 
475 static void
476 dump_dtl(vdev_t *vd, int indent)
477 {
478 	avl_tree_t *t = &vd->vdev_dtl_map.sm_root;
479 	spa_t *spa = vd->vdev_spa;
480 	space_seg_t *ss;
481 	vdev_t *pvd;
482 	int c;
483 
484 	if (indent == 0)
485 		(void) printf("\nDirty time logs:\n\n");
486 
487 	spa_config_enter(spa, RW_READER, FTAG);
488 	(void) printf("\t%*s%s\n", indent, "", vdev_description(vd));
489 	spa_config_exit(spa, FTAG);
490 
491 	for (ss = avl_first(t); ss; ss = AVL_NEXT(t, ss)) {
492 		/*
493 		 * Everything in this DTL must appear in all parent DTL unions.
494 		 */
495 		for (pvd = vd; pvd; pvd = pvd->vdev_parent)
496 			ASSERT(vdev_dtl_contains(&pvd->vdev_dtl_map,
497 			    ss->ss_start, ss->ss_end - ss->ss_start));
498 		(void) printf("\t%*soutage [%llu,%llu] length %llu\n",
499 		    indent, "",
500 		    (u_longlong_t)ss->ss_start,
501 		    (u_longlong_t)ss->ss_end - 1,
502 		    (u_longlong_t)(ss->ss_end - ss->ss_start));
503 	}
504 
505 	(void) printf("\n");
506 
507 	if (dump_opt['d'] > 5 && vd->vdev_children == 0) {
508 		dump_spacemap(vd->vdev_spa->spa_meta_objset, &vd->vdev_dtl,
509 		    &vd->vdev_dtl_map);
510 		(void) printf("\n");
511 	}
512 
513 	for (c = 0; c < vd->vdev_children; c++)
514 		dump_dtl(vd->vdev_child[c], indent + 4);
515 }
516 
517 /*ARGSUSED*/
518 static void
519 dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
520 {
521 }
522 
523 static uint64_t
524 blkid2offset(dnode_phys_t *dnp, int level, uint64_t blkid)
525 {
526 	if (level < 0)
527 		return (blkid);
528 
529 	return ((blkid << (level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
530 	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
531 }
532 
533 static void
534 sprintf_blkptr_compact(char *blkbuf, blkptr_t *bp, int alldvas)
535 {
536 	dva_t *dva = bp->blk_dva;
537 	int ndvas = alldvas ? BP_GET_NDVAS(bp) : 1;
538 	int i;
539 
540 	blkbuf[0] = '\0';
541 
542 	for (i = 0; i < ndvas; i++)
543 		(void) sprintf(blkbuf + strlen(blkbuf), "%llu:%llx:%llx ",
544 		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
545 		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
546 		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
547 
548 	(void) sprintf(blkbuf + strlen(blkbuf), "%llxL/%llxP F=%llu B=%llu",
549 	    (u_longlong_t)BP_GET_LSIZE(bp),
550 	    (u_longlong_t)BP_GET_PSIZE(bp),
551 	    (u_longlong_t)bp->blk_fill,
552 	    (u_longlong_t)bp->blk_birth);
553 }
554 
555 /* ARGSUSED */
556 static int
557 zdb_indirect_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a)
558 {
559 	zbookmark_t *zb = &bc->bc_bookmark;
560 	blkptr_t *bp = &bc->bc_blkptr;
561 	void *data = bc->bc_data;
562 	dnode_phys_t *dnp = bc->bc_dnode;
563 	char blkbuf[BP_SPRINTF_LEN + 80];
564 	int l;
565 
566 	if (bc->bc_errno) {
567 		(void) sprintf(blkbuf,
568 		    "Error %d reading <%llu, %llu, %lld, %llu>: ",
569 		    bc->bc_errno,
570 		    (u_longlong_t)zb->zb_objset,
571 		    (u_longlong_t)zb->zb_object,
572 		    (u_longlong_t)zb->zb_level,
573 		    (u_longlong_t)zb->zb_blkid);
574 		goto out;
575 	}
576 
577 	if (zb->zb_level == -1) {
578 		ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
579 		ASSERT3U(BP_GET_LEVEL(bp), ==, 0);
580 	} else {
581 		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
582 		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
583 	}
584 
585 	if (zb->zb_level > 0) {
586 		uint64_t fill = 0;
587 		blkptr_t *bpx, *bpend;
588 
589 		for (bpx = data, bpend = bpx + BP_GET_LSIZE(bp) / sizeof (*bpx);
590 		    bpx < bpend; bpx++) {
591 			if (bpx->blk_birth != 0) {
592 				fill += bpx->blk_fill;
593 			} else {
594 				ASSERT(bpx->blk_fill == 0);
595 			}
596 		}
597 		ASSERT3U(fill, ==, bp->blk_fill);
598 	}
599 
600 	if (zb->zb_level == 0 && dnp->dn_type == DMU_OT_DNODE) {
601 		uint64_t fill = 0;
602 		dnode_phys_t *dnx, *dnend;
603 
604 		for (dnx = data, dnend = dnx + (BP_GET_LSIZE(bp)>>DNODE_SHIFT);
605 		    dnx < dnend; dnx++) {
606 			if (dnx->dn_type != DMU_OT_NONE)
607 				fill++;
608 		}
609 		ASSERT3U(fill, ==, bp->blk_fill);
610 	}
611 
612 	(void) sprintf(blkbuf, "%16llx ",
613 	    (u_longlong_t)blkid2offset(dnp, zb->zb_level, zb->zb_blkid));
614 
615 	ASSERT(zb->zb_level >= 0);
616 
617 	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
618 		if (l == zb->zb_level) {
619 			(void) sprintf(blkbuf + strlen(blkbuf), "L%llx",
620 			    (u_longlong_t)zb->zb_level);
621 		} else {
622 			(void) sprintf(blkbuf + strlen(blkbuf), " ");
623 		}
624 	}
625 
626 out:
627 	if (bp->blk_birth == 0) {
628 		(void) sprintf(blkbuf + strlen(blkbuf), "<hole>");
629 		(void) printf("%s\n", blkbuf);
630 	} else {
631 		sprintf_blkptr_compact(blkbuf + strlen(blkbuf), bp,
632 		    dump_opt['d'] > 5 ? 1 : 0);
633 		(void) printf("%s\n", blkbuf);
634 	}
635 
636 	return (bc->bc_errno ? ERESTART : 0);
637 }
638 
639 /*ARGSUSED*/
640 static void
641 dump_indirect(objset_t *os, uint64_t object, void *data, size_t size)
642 {
643 	traverse_handle_t *th;
644 	uint64_t objset = dmu_objset_id(os);
645 	int advance = zdb_advance;
646 
647 	(void) printf("Indirect blocks:\n");
648 
649 	if (object == 0)
650 		advance |= ADVANCE_DATA;
651 
652 	th = traverse_init(dmu_objset_spa(os), zdb_indirect_cb, NULL, advance,
653 	    ZIO_FLAG_CANFAIL);
654 	th->th_noread = zdb_noread;
655 
656 	traverse_add_dnode(th, 0, -1ULL, objset, object);
657 
658 	while (traverse_more(th) == EAGAIN)
659 		continue;
660 
661 	(void) printf("\n");
662 
663 	traverse_fini(th);
664 }
665 
666 /*ARGSUSED*/
667 static void
668 dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
669 {
670 	dsl_dir_phys_t *dd = data;
671 	time_t crtime;
672 	char used[6], compressed[6], uncompressed[6], quota[6], resv[6];
673 
674 	if (dd == NULL)
675 		return;
676 
677 	ASSERT(size == sizeof (*dd));
678 
679 	crtime = dd->dd_creation_time;
680 	nicenum(dd->dd_used_bytes, used);
681 	nicenum(dd->dd_compressed_bytes, compressed);
682 	nicenum(dd->dd_uncompressed_bytes, uncompressed);
683 	nicenum(dd->dd_quota, quota);
684 	nicenum(dd->dd_reserved, resv);
685 
686 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
687 	(void) printf("\t\thead_dataset_obj = %llu\n",
688 	    (u_longlong_t)dd->dd_head_dataset_obj);
689 	(void) printf("\t\tparent_dir_obj = %llu\n",
690 	    (u_longlong_t)dd->dd_parent_obj);
691 	(void) printf("\t\tclone_parent_obj = %llu\n",
692 	    (u_longlong_t)dd->dd_clone_parent_obj);
693 	(void) printf("\t\tchild_dir_zapobj = %llu\n",
694 	    (u_longlong_t)dd->dd_child_dir_zapobj);
695 	(void) printf("\t\tused_bytes = %s\n", used);
696 	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
697 	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
698 	(void) printf("\t\tquota = %s\n", quota);
699 	(void) printf("\t\treserved = %s\n", resv);
700 	(void) printf("\t\tprops_zapobj = %llu\n",
701 	    (u_longlong_t)dd->dd_props_zapobj);
702 }
703 
704 /*ARGSUSED*/
705 static void
706 dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
707 {
708 	dsl_dataset_phys_t *ds = data;
709 	time_t crtime;
710 	char used[6], compressed[6], uncompressed[6], unique[6];
711 	char blkbuf[BP_SPRINTF_LEN];
712 
713 	if (ds == NULL)
714 		return;
715 
716 	ASSERT(size == sizeof (*ds));
717 	crtime = ds->ds_creation_time;
718 	nicenum(ds->ds_used_bytes, used);
719 	nicenum(ds->ds_compressed_bytes, compressed);
720 	nicenum(ds->ds_uncompressed_bytes, uncompressed);
721 	nicenum(ds->ds_unique_bytes, unique);
722 	sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ds->ds_bp);
723 
724 	(void) printf("\t\tdataset_obj = %llu\n",
725 	    (u_longlong_t)ds->ds_dir_obj);
726 	(void) printf("\t\tprev_snap_obj = %llu\n",
727 	    (u_longlong_t)ds->ds_prev_snap_obj);
728 	(void) printf("\t\tprev_snap_txg = %llu\n",
729 	    (u_longlong_t)ds->ds_prev_snap_txg);
730 	(void) printf("\t\tnext_snap_obj = %llu\n",
731 	    (u_longlong_t)ds->ds_next_snap_obj);
732 	(void) printf("\t\tsnapnames_zapobj = %llu\n",
733 	    (u_longlong_t)ds->ds_snapnames_zapobj);
734 	(void) printf("\t\tnum_children = %llu\n",
735 	    (u_longlong_t)ds->ds_num_children);
736 	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
737 	(void) printf("\t\tcreation_txg = %llu\n",
738 	    (u_longlong_t)ds->ds_creation_txg);
739 	(void) printf("\t\tdeadlist_obj = %llu\n",
740 	    (u_longlong_t)ds->ds_deadlist_obj);
741 	(void) printf("\t\tused_bytes = %s\n", used);
742 	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
743 	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
744 	(void) printf("\t\tunique = %s\n", unique);
745 	(void) printf("\t\tfsid_guid = %llu\n",
746 	    (u_longlong_t)ds->ds_fsid_guid);
747 	(void) printf("\t\tguid = %llu\n",
748 	    (u_longlong_t)ds->ds_guid);
749 	(void) printf("\t\tflags = %llx\n",
750 	    (u_longlong_t)ds->ds_flags);
751 	(void) printf("\t\tbp = %s\n", blkbuf);
752 }
753 
754 static void
755 dump_bplist(objset_t *mos, uint64_t object, char *name)
756 {
757 	bplist_t bpl = { 0 };
758 	blkptr_t blk, *bp = &blk;
759 	uint64_t itor = 0;
760 	char bytes[6];
761 	char comp[6];
762 	char uncomp[6];
763 
764 	if (dump_opt['d'] < 3)
765 		return;
766 
767 	VERIFY(0 == bplist_open(&bpl, mos, object));
768 	if (bplist_empty(&bpl)) {
769 		bplist_close(&bpl);
770 		return;
771 	}
772 
773 	nicenum(bpl.bpl_phys->bpl_bytes, bytes);
774 	if (bpl.bpl_dbuf->db_size == sizeof (bplist_phys_t)) {
775 		nicenum(bpl.bpl_phys->bpl_comp, comp);
776 		nicenum(bpl.bpl_phys->bpl_uncomp, uncomp);
777 		(void) printf("\n    %s: %llu entries, %s (%s/%s comp)\n",
778 		    name, (u_longlong_t)bpl.bpl_phys->bpl_entries,
779 		    bytes, comp, uncomp);
780 	} else {
781 		(void) printf("\n    %s: %llu entries, %s\n",
782 		    name, (u_longlong_t)bpl.bpl_phys->bpl_entries, bytes);
783 	}
784 
785 	if (dump_opt['d'] < 5) {
786 		bplist_close(&bpl);
787 		return;
788 	}
789 
790 	(void) printf("\n");
791 
792 	while (bplist_iterate(&bpl, &itor, bp) == 0) {
793 		char blkbuf[BP_SPRINTF_LEN];
794 
795 		ASSERT(bp->blk_birth != 0);
796 		sprintf_blkptr_compact(blkbuf, bp, dump_opt['d'] > 5 ? 1 : 0);
797 		(void) printf("\tItem %3llu: %s\n",
798 		    (u_longlong_t)itor - 1, blkbuf);
799 	}
800 
801 	bplist_close(&bpl);
802 }
803 
804 static char *
805 znode_path(objset_t *os, uint64_t object, char *pathbuf, size_t size)
806 {
807 	dmu_buf_t *db;
808 	dmu_object_info_t doi;
809 	znode_phys_t *zp;
810 	uint64_t parent = 0;
811 	size_t complen;
812 	char component[MAXNAMELEN + 1];
813 	char *path;
814 	int error;
815 
816 	path = pathbuf + size;
817 	*--path = '\0';
818 
819 	for (;;) {
820 		error = dmu_bonus_hold(os, object, FTAG, &db);
821 		if (error)
822 			break;
823 
824 		dmu_object_info_from_db(db, &doi);
825 		zp = db->db_data;
826 		parent = zp->zp_parent;
827 		dmu_buf_rele(db, FTAG);
828 
829 		if (doi.doi_bonus_type != DMU_OT_ZNODE)
830 			break;
831 
832 		if (parent == object) {
833 			if (path[0] != '/')
834 				*--path = '/';
835 			return (path);
836 		}
837 
838 		if (zap_value_search(os, parent, object, component) != 0)
839 			break;
840 
841 		complen = strlen(component);
842 		path -= complen;
843 		bcopy(component, path, complen);
844 		*--path = '/';
845 
846 		object = parent;
847 	}
848 
849 	(void) sprintf(component, "\?\?\?<object#%llu>", (u_longlong_t)object);
850 
851 	complen = strlen(component);
852 	path -= complen;
853 	bcopy(component, path, complen);
854 
855 	return (path);
856 }
857 
858 /*ARGSUSED*/
859 static void
860 dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
861 {
862 	znode_phys_t *zp = data;
863 	time_t z_crtime, z_atime, z_mtime, z_ctime;
864 	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
865 
866 	ASSERT(size >= sizeof (znode_phys_t));
867 
868 	if (dump_opt['d'] < 3) {
869 		(void) printf("\t%s\n",
870 		    znode_path(os, object, path, sizeof (path)));
871 		return;
872 	}
873 
874 	z_crtime = (time_t)zp->zp_crtime[0];
875 	z_atime = (time_t)zp->zp_atime[0];
876 	z_mtime = (time_t)zp->zp_mtime[0];
877 	z_ctime = (time_t)zp->zp_ctime[0];
878 
879 	(void) printf("\tpath	%s\n",
880 	    znode_path(os, object, path, sizeof (path)));
881 	(void) printf("\tatime	%s", ctime(&z_atime));
882 	(void) printf("\tmtime	%s", ctime(&z_mtime));
883 	(void) printf("\tctime	%s", ctime(&z_ctime));
884 	(void) printf("\tcrtime	%s", ctime(&z_crtime));
885 	(void) printf("\tgen	%llu\n", (u_longlong_t)zp->zp_gen);
886 	(void) printf("\tmode	%llo\n", (u_longlong_t)zp->zp_mode);
887 	(void) printf("\tsize	%llu\n", (u_longlong_t)zp->zp_size);
888 	(void) printf("\tparent	%llu\n", (u_longlong_t)zp->zp_parent);
889 	(void) printf("\tlinks	%llu\n", (u_longlong_t)zp->zp_links);
890 	(void) printf("\txattr	%llu\n", (u_longlong_t)zp->zp_xattr);
891 	(void) printf("\trdev	0x%016llx\n", (u_longlong_t)zp->zp_rdev);
892 }
893 
894 /*ARGSUSED*/
895 static void
896 dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
897 {
898 }
899 
900 /*ARGSUSED*/
901 static void
902 dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
903 {
904 }
905 
906 static object_viewer_t *object_viewer[DMU_OT_NUMTYPES] = {
907 	dump_none,		/* unallocated			*/
908 	dump_zap,		/* object directory		*/
909 	dump_uint64,		/* object array			*/
910 	dump_none,		/* packed nvlist		*/
911 	dump_packed_nvlist,	/* packed nvlist size		*/
912 	dump_none,		/* bplist			*/
913 	dump_none,		/* bplist header		*/
914 	dump_none,		/* SPA space map header		*/
915 	dump_none,		/* SPA space map		*/
916 	dump_none,		/* ZIL intent log		*/
917 	dump_dnode,		/* DMU dnode			*/
918 	dump_dmu_objset,	/* DMU objset			*/
919 	dump_dsl_dir,		/* DSL directory		*/
920 	dump_zap,		/* DSL directory child map	*/
921 	dump_zap,		/* DSL dataset snap map		*/
922 	dump_zap,		/* DSL props			*/
923 	dump_dsl_dataset,	/* DSL dataset			*/
924 	dump_znode,		/* ZFS znode			*/
925 	dump_acl,		/* ZFS ACL			*/
926 	dump_uint8,		/* ZFS plain file		*/
927 	dump_zap,		/* ZFS directory		*/
928 	dump_zap,		/* ZFS master node		*/
929 	dump_zap,		/* ZFS delete queue		*/
930 	dump_uint8,		/* zvol object			*/
931 	dump_zap,		/* zvol prop			*/
932 	dump_uint8,		/* other uint8[]		*/
933 	dump_uint64,		/* other uint64[]		*/
934 	dump_zap,		/* other ZAP			*/
935 	dump_zap,		/* persistent error log		*/
936 	dump_uint8,		/* SPA history			*/
937 	dump_uint64,		/* SPA history offsets		*/
938 };
939 
940 static void
941 dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
942 {
943 	dmu_buf_t *db = NULL;
944 	dmu_object_info_t doi;
945 	dnode_t *dn;
946 	void *bonus = NULL;
947 	size_t bsize = 0;
948 	char iblk[6], dblk[6], lsize[6], asize[6], bonus_size[6], segsize[6];
949 	char aux[50];
950 	int error;
951 
952 	if (*print_header) {
953 		(void) printf("\n    Object  lvl   iblk   dblk  lsize"
954 		    "  asize  type\n");
955 		*print_header = 0;
956 	}
957 
958 	if (object == 0) {
959 		dn = os->os->os_meta_dnode;
960 	} else {
961 		error = dmu_bonus_hold(os, object, FTAG, &db);
962 		if (error)
963 			fatal("dmu_bonus_hold(%llu) failed, errno %u",
964 			    object, error);
965 		bonus = db->db_data;
966 		bsize = db->db_size;
967 		dn = ((dmu_buf_impl_t *)db)->db_dnode;
968 	}
969 	dmu_object_info_from_dnode(dn, &doi);
970 
971 	nicenum(doi.doi_metadata_block_size, iblk);
972 	nicenum(doi.doi_data_block_size, dblk);
973 	nicenum(doi.doi_data_block_size * (doi.doi_max_block_offset + 1),
974 	    lsize);
975 	nicenum(doi.doi_physical_blks << 9, asize);
976 	nicenum(doi.doi_bonus_size, bonus_size);
977 
978 	aux[0] = '\0';
979 
980 	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6)
981 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
982 		zio_checksum_table[doi.doi_checksum].ci_name);
983 
984 	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6)
985 		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
986 		zio_compress_table[doi.doi_compress].ci_name);
987 
988 	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %s%s\n",
989 	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk, lsize,
990 	    asize, dmu_ot[doi.doi_type].ot_name, aux);
991 
992 	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
993 		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %s\n",
994 		    "", "", "", "", bonus_size, "bonus",
995 		    dmu_ot[doi.doi_bonus_type].ot_name);
996 	}
997 
998 	if (verbosity >= 4) {
999 		object_viewer[doi.doi_bonus_type](os, object, bonus, bsize);
1000 		object_viewer[doi.doi_type](os, object, NULL, 0);
1001 		*print_header = 1;
1002 	}
1003 
1004 	if (verbosity >= 5)
1005 		dump_indirect(os, object, NULL, 0);
1006 
1007 	if (verbosity >= 5) {
1008 		/*
1009 		 * Report the list of segments that comprise the object.
1010 		 */
1011 		uint64_t start = 0;
1012 		uint64_t end;
1013 		uint64_t blkfill = 1;
1014 		int minlvl = 1;
1015 
1016 		if (dn->dn_type == DMU_OT_DNODE) {
1017 			minlvl = 0;
1018 			blkfill = DNODES_PER_BLOCK;
1019 		}
1020 
1021 		for (;;) {
1022 			error = dnode_next_offset(dn, B_FALSE, &start, minlvl,
1023 			    blkfill, 0);
1024 			if (error)
1025 				break;
1026 			end = start;
1027 			error = dnode_next_offset(dn, B_TRUE, &end, minlvl,
1028 			    blkfill, 0);
1029 			nicenum(end - start, segsize);
1030 			(void) printf("\t\tsegment [%016llx, %016llx)"
1031 			    " size %5s\n", (u_longlong_t)start,
1032 			    (u_longlong_t)end, segsize);
1033 			if (error)
1034 				break;
1035 			start = end;
1036 		}
1037 	}
1038 
1039 	if (db != NULL)
1040 		dmu_buf_rele(db, FTAG);
1041 }
1042 
1043 static char *objset_types[DMU_OST_NUMTYPES] = {
1044 	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1045 
1046 /*ARGSUSED*/
1047 static void
1048 dump_dir(objset_t *os)
1049 {
1050 	dmu_objset_stats_t dds;
1051 	uint64_t object, object_count;
1052 	uint64_t refdbytes, usedobjs, scratch;
1053 	char numbuf[8];
1054 	char blkbuf[BP_SPRINTF_LEN];
1055 	char osname[MAXNAMELEN];
1056 	char *type = "UNKNOWN";
1057 	int verbosity = dump_opt['d'];
1058 	int print_header = 1;
1059 	int i, error;
1060 
1061 	dmu_objset_fast_stat(os, &dds);
1062 
1063 	if (dds.dds_type < DMU_OST_NUMTYPES)
1064 		type = objset_types[dds.dds_type];
1065 
1066 	if (dds.dds_type == DMU_OST_META) {
1067 		dds.dds_creation_txg = TXG_INITIAL;
1068 		usedobjs = os->os->os_rootbp.blk_fill;
1069 		refdbytes =
1070 		    os->os->os_spa->spa_dsl_pool->dp_mos_dir->dd_used_bytes;
1071 	} else {
1072 		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
1073 	}
1074 
1075 	ASSERT3U(usedobjs, ==, os->os->os_rootbp.blk_fill);
1076 
1077 	nicenum(refdbytes, numbuf);
1078 
1079 	if (verbosity >= 4) {
1080 		(void) strcpy(blkbuf, ", rootbp ");
1081 		sprintf_blkptr(blkbuf + strlen(blkbuf),
1082 		    BP_SPRINTF_LEN - strlen(blkbuf), &os->os->os_rootbp);
1083 	} else {
1084 		blkbuf[0] = '\0';
1085 	}
1086 
1087 	dmu_objset_name(os, osname);
1088 
1089 	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
1090 	    "%s, %llu objects%s\n",
1091 	    osname, type, (u_longlong_t)dmu_objset_id(os),
1092 	    (u_longlong_t)dds.dds_creation_txg,
1093 	    numbuf, (u_longlong_t)usedobjs, blkbuf);
1094 
1095 	dump_intent_log(dmu_objset_zil(os));
1096 
1097 	if (dmu_objset_ds(os) != NULL)
1098 		dump_bplist(dmu_objset_pool(os)->dp_meta_objset,
1099 		    dmu_objset_ds(os)->ds_phys->ds_deadlist_obj, "Deadlist");
1100 
1101 	if (verbosity < 2)
1102 		return;
1103 
1104 	if (zopt_objects != 0) {
1105 		for (i = 0; i < zopt_objects; i++)
1106 			dump_object(os, zopt_object[i], verbosity,
1107 			    &print_header);
1108 		(void) printf("\n");
1109 		return;
1110 	}
1111 
1112 	dump_object(os, 0, verbosity, &print_header);
1113 	object_count = 1;
1114 
1115 	object = 0;
1116 	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
1117 		dump_object(os, object, verbosity, &print_header);
1118 		object_count++;
1119 	}
1120 
1121 	ASSERT3U(object_count, ==, usedobjs);
1122 
1123 	(void) printf("\n");
1124 
1125 	if (error != ESRCH)
1126 		fatal("dmu_object_next() = %d", error);
1127 }
1128 
1129 static void
1130 dump_uberblock(uberblock_t *ub)
1131 {
1132 	time_t timestamp = ub->ub_timestamp;
1133 
1134 	(void) printf("Uberblock\n\n");
1135 	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1136 	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1137 	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1138 	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1139 	(void) printf("\ttimestamp = %llu UTC = %s",
1140 	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1141 	if (dump_opt['u'] >= 3) {
1142 		char blkbuf[BP_SPRINTF_LEN];
1143 		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ub->ub_rootbp);
1144 		(void) printf("\trootbp = %s\n", blkbuf);
1145 	}
1146 	(void) printf("\n");
1147 }
1148 
1149 static void
1150 dump_config(const char *pool)
1151 {
1152 	spa_t *spa = NULL;
1153 
1154 	mutex_enter(&spa_namespace_lock);
1155 	while ((spa = spa_next(spa)) != NULL) {
1156 		if (pool == NULL)
1157 			(void) printf("%s\n", spa_name(spa));
1158 		if (pool == NULL || strcmp(pool, spa_name(spa)) == 0)
1159 			dump_nvlist(spa->spa_config, 4);
1160 	}
1161 	mutex_exit(&spa_namespace_lock);
1162 }
1163 
1164 static void
1165 dump_label(const char *dev)
1166 {
1167 	int fd;
1168 	vdev_label_t label;
1169 	char *buf = label.vl_vdev_phys.vp_nvlist;
1170 	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
1171 	struct stat64 statbuf;
1172 	uint64_t psize;
1173 	int l;
1174 
1175 	if ((fd = open64(dev, O_RDONLY)) < 0) {
1176 		(void) printf("cannot open '%s': %s\n", dev, strerror(errno));
1177 		exit(1);
1178 	}
1179 
1180 	if (fstat64(fd, &statbuf) != 0) {
1181 		(void) printf("failed to stat '%s': %s\n", dev,
1182 		    strerror(errno));
1183 		exit(1);
1184 	}
1185 
1186 	psize = statbuf.st_size;
1187 	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
1188 
1189 	for (l = 0; l < VDEV_LABELS; l++) {
1190 
1191 		nvlist_t *config = NULL;
1192 
1193 		(void) printf("--------------------------------------------\n");
1194 		(void) printf("LABEL %d\n", l);
1195 		(void) printf("--------------------------------------------\n");
1196 
1197 		if (pread64(fd, &label, sizeof (label),
1198 		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
1199 			(void) printf("failed to read label %d\n", l);
1200 			continue;
1201 		}
1202 
1203 		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
1204 			(void) printf("failed to unpack label %d\n", l);
1205 			continue;
1206 		}
1207 		dump_nvlist(config, 4);
1208 		nvlist_free(config);
1209 	}
1210 }
1211 
1212 /*ARGSUSED*/
1213 static int
1214 dump_one_dir(char *dsname, void *arg)
1215 {
1216 	int error;
1217 	objset_t *os;
1218 
1219 	error = dmu_objset_open(dsname, DMU_OST_ANY,
1220 	    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
1221 	if (error) {
1222 		(void) printf("Could not open %s\n", dsname);
1223 		return (0);
1224 	}
1225 	dump_dir(os);
1226 	dmu_objset_close(os);
1227 	return (0);
1228 }
1229 
1230 static void
1231 zdb_space_map_load(spa_t *spa)
1232 {
1233 	vdev_t *rvd = spa->spa_root_vdev;
1234 	vdev_t *vd;
1235 	int c, m, error;
1236 
1237 	for (c = 0; c < rvd->vdev_children; c++) {
1238 		vd = rvd->vdev_child[c];
1239 		for (m = 0; m < vd->vdev_ms_count; m++) {
1240 			metaslab_t *msp = vd->vdev_ms[m];
1241 			mutex_enter(&msp->ms_lock);
1242 			error = space_map_load(&msp->ms_allocmap[0], NULL,
1243 			    SM_ALLOC, &msp->ms_smo, spa->spa_meta_objset);
1244 			mutex_exit(&msp->ms_lock);
1245 			if (error)
1246 				fatal("%s bad space map #%d, error %d",
1247 				    spa->spa_name, c, error);
1248 		}
1249 	}
1250 }
1251 
1252 static int
1253 zdb_space_map_claim(spa_t *spa, blkptr_t *bp, zbookmark_t *zb)
1254 {
1255 	dva_t *dva = bp->blk_dva;
1256 	vdev_t *vd;
1257 	metaslab_t *msp;
1258 	space_map_t *allocmap, *freemap;
1259 	int error;
1260 	int d;
1261 	blkptr_t blk = *bp;
1262 
1263 	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1264 		uint64_t vdev = DVA_GET_VDEV(&dva[d]);
1265 		uint64_t offset = DVA_GET_OFFSET(&dva[d]);
1266 		uint64_t size = DVA_GET_ASIZE(&dva[d]);
1267 
1268 		if ((vd = vdev_lookup_top(spa, vdev)) == NULL)
1269 			return (ENXIO);
1270 
1271 		if ((offset >> vd->vdev_ms_shift) >= vd->vdev_ms_count)
1272 			return (ENXIO);
1273 
1274 		msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
1275 		allocmap = &msp->ms_allocmap[0];
1276 		freemap = &msp->ms_freemap[0];
1277 
1278 		/* Prepare our copy of the bp in case we need to read GBHs */
1279 		if (DVA_GET_GANG(&dva[d])) {
1280 			size = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
1281 			DVA_SET_ASIZE(&blk.blk_dva[d], size);
1282 			DVA_SET_GANG(&blk.blk_dva[d], 0);
1283 		}
1284 
1285 		mutex_enter(&msp->ms_lock);
1286 		if (space_map_contains(freemap, offset, size)) {
1287 			mutex_exit(&msp->ms_lock);
1288 			return (EAGAIN);	/* allocated more than once */
1289 		}
1290 
1291 		if (!space_map_contains(allocmap, offset, size)) {
1292 			mutex_exit(&msp->ms_lock);
1293 			return (ESTALE);	/* not allocated at all */
1294 		}
1295 
1296 		space_map_remove(allocmap, offset, size);
1297 		space_map_add(freemap, offset, size);
1298 
1299 		mutex_exit(&msp->ms_lock);
1300 	}
1301 
1302 	if (BP_IS_GANG(bp)) {
1303 		zio_gbh_phys_t gbh;
1304 		int g;
1305 
1306 		/* LINTED - compile time assert */
1307 		ASSERT(sizeof (zio_gbh_phys_t) == SPA_GANGBLOCKSIZE);
1308 
1309 		BP_SET_CHECKSUM(&blk, ZIO_CHECKSUM_GANG_HEADER);
1310 		BP_SET_PSIZE(&blk, SPA_GANGBLOCKSIZE);
1311 		BP_SET_LSIZE(&blk, SPA_GANGBLOCKSIZE);
1312 		BP_SET_COMPRESS(&blk, ZIO_COMPRESS_OFF);
1313 		error = zio_wait(zio_read(NULL, spa, &blk, &gbh,
1314 		    SPA_GANGBLOCKSIZE, NULL, NULL, ZIO_PRIORITY_SYNC_READ,
1315 		    ZIO_FLAG_CANFAIL | ZIO_FLAG_CONFIG_HELD, zb));
1316 		if (error)
1317 			return (error);
1318 		if (BP_SHOULD_BYTESWAP(&blk))
1319 			byteswap_uint64_array(&gbh, SPA_GANGBLOCKSIZE);
1320 		for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
1321 			if (BP_IS_HOLE(&gbh.zg_blkptr[g]))
1322 				break;
1323 			error = zdb_space_map_claim(spa, &gbh.zg_blkptr[g], zb);
1324 			if (error)
1325 				return (error);
1326 		}
1327 	}
1328 
1329 	return (0);
1330 }
1331 
1332 static void
1333 zdb_leak(space_map_t *sm, uint64_t start, uint64_t size)
1334 {
1335 	metaslab_t *msp;
1336 
1337 	/* LINTED */
1338 	msp = (metaslab_t *)((char *)sm - offsetof(metaslab_t, ms_allocmap[0]));
1339 
1340 	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
1341 	    (u_longlong_t)msp->ms_group->mg_vd->vdev_id,
1342 	    (u_longlong_t)start,
1343 	    (u_longlong_t)size);
1344 }
1345 
1346 static void
1347 zdb_space_map_unload(spa_t *spa)
1348 {
1349 	vdev_t *rvd = spa->spa_root_vdev;
1350 	vdev_t *vd;
1351 	int c, m;
1352 
1353 	for (c = 0; c < rvd->vdev_children; c++) {
1354 		vd = rvd->vdev_child[c];
1355 		for (m = 0; m < vd->vdev_ms_count; m++) {
1356 			metaslab_t *msp = vd->vdev_ms[m];
1357 			mutex_enter(&msp->ms_lock);
1358 			space_map_vacate(&msp->ms_allocmap[0], zdb_leak,
1359 			    &msp->ms_allocmap[0]);
1360 			space_map_unload(&msp->ms_allocmap[0]);
1361 			space_map_vacate(&msp->ms_freemap[0], NULL, NULL);
1362 			mutex_exit(&msp->ms_lock);
1363 		}
1364 	}
1365 }
1366 
1367 static void
1368 zdb_refresh_ubsync(spa_t *spa)
1369 {
1370 	uberblock_t ub = { 0 };
1371 	vdev_t *rvd = spa->spa_root_vdev;
1372 	zio_t *zio;
1373 
1374 	/*
1375 	 * Reload the uberblock.
1376 	 */
1377 	zio = zio_root(spa, NULL, NULL,
1378 	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1379 	vdev_uberblock_load(zio, rvd, &ub);
1380 	(void) zio_wait(zio);
1381 
1382 	if (ub.ub_txg != 0)
1383 		spa->spa_ubsync = ub;
1384 }
1385 
1386 /*
1387  * Verify that the sum of the sizes of all blocks in the pool adds up
1388  * to the SPA's sa_alloc total.
1389  */
1390 typedef struct zdb_blkstats {
1391 	uint64_t	zb_asize;
1392 	uint64_t	zb_lsize;
1393 	uint64_t	zb_psize;
1394 	uint64_t	zb_count;
1395 } zdb_blkstats_t;
1396 
1397 #define	DMU_OT_DEFERRED	DMU_OT_NONE
1398 #define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
1399 
1400 #define	ZB_TOTAL	ZB_MAXLEVEL
1401 
1402 typedef struct zdb_cb {
1403 	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][DMU_OT_TOTAL + 1];
1404 	uint64_t	zcb_errors[256];
1405 	traverse_blk_cache_t *zcb_cache;
1406 	int		zcb_readfails;
1407 	int		zcb_haderrors;
1408 } zdb_cb_t;
1409 
1410 static void
1411 zdb_count_block(spa_t *spa, zdb_cb_t *zcb, blkptr_t *bp, int type)
1412 {
1413 	int i, error;
1414 
1415 	for (i = 0; i < 4; i++) {
1416 		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
1417 		int t = (i & 1) ? type : DMU_OT_TOTAL;
1418 		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
1419 
1420 		zb->zb_asize += BP_GET_ASIZE(bp);
1421 		zb->zb_lsize += BP_GET_LSIZE(bp);
1422 		zb->zb_psize += BP_GET_PSIZE(bp);
1423 		zb->zb_count++;
1424 	}
1425 
1426 	if (dump_opt['L'])
1427 		return;
1428 
1429 	error = zdb_space_map_claim(spa, bp, &zcb->zcb_cache->bc_bookmark);
1430 
1431 	if (error == 0)
1432 		return;
1433 
1434 	if (error == EAGAIN)
1435 		(void) fatal("double-allocation, bp=%p", bp);
1436 
1437 	if (error == ESTALE)
1438 		(void) fatal("reference to freed block, bp=%p", bp);
1439 
1440 	(void) fatal("fatal error %d in bp %p", error, bp);
1441 }
1442 
1443 static int
1444 zdb_blkptr_cb(traverse_blk_cache_t *bc, spa_t *spa, void *arg)
1445 {
1446 	zbookmark_t *zb = &bc->bc_bookmark;
1447 	zdb_cb_t *zcb = arg;
1448 	blkptr_t *bp = &bc->bc_blkptr;
1449 	dmu_object_type_t type = BP_GET_TYPE(bp);
1450 	char blkbuf[BP_SPRINTF_LEN];
1451 	int error = 0;
1452 
1453 	if (bc->bc_errno) {
1454 		if (zcb->zcb_readfails++ < 10 && dump_opt['L']) {
1455 			zdb_refresh_ubsync(spa);
1456 			error = EAGAIN;
1457 		} else {
1458 			zcb->zcb_haderrors = 1;
1459 			zcb->zcb_errors[bc->bc_errno]++;
1460 			error = ERESTART;
1461 		}
1462 
1463 		if (dump_opt['b'] >= 3 || (dump_opt['b'] >= 2 && bc->bc_errno))
1464 			sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1465 		else
1466 			blkbuf[0] = '\0';
1467 
1468 		(void) printf("zdb_blkptr_cb: Got error %d reading "
1469 		    "<%llu, %llu, %lld, %llx> %s -- %s\n",
1470 		    bc->bc_errno,
1471 		    (u_longlong_t)zb->zb_objset,
1472 		    (u_longlong_t)zb->zb_object,
1473 		    (u_longlong_t)zb->zb_level,
1474 		    (u_longlong_t)zb->zb_blkid,
1475 		    blkbuf,
1476 		    error == EAGAIN ? "retrying" : "skipping");
1477 
1478 		return (error);
1479 	}
1480 
1481 	zcb->zcb_readfails = 0;
1482 
1483 	ASSERT(!BP_IS_HOLE(bp));
1484 
1485 	if (dump_opt['b'] >= 4) {
1486 		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1487 		(void) printf("objset %llu object %llu offset 0x%llx %s\n",
1488 		    (u_longlong_t)zb->zb_objset,
1489 		    (u_longlong_t)zb->zb_object,
1490 		    (u_longlong_t)blkid2offset(bc->bc_dnode,
1491 			zb->zb_level, zb->zb_blkid),
1492 		    blkbuf);
1493 	}
1494 
1495 	zdb_count_block(spa, zcb, bp, type);
1496 
1497 	return (0);
1498 }
1499 
1500 static int
1501 dump_block_stats(spa_t *spa)
1502 {
1503 	traverse_handle_t *th;
1504 	zdb_cb_t zcb = { 0 };
1505 	traverse_blk_cache_t dummy_cache = { 0 };
1506 	zdb_blkstats_t *zb, *tzb;
1507 	uint64_t alloc, space;
1508 	int leaks = 0;
1509 	int advance = zdb_advance;
1510 	int flags;
1511 	int e;
1512 
1513 	zcb.zcb_cache = &dummy_cache;
1514 
1515 	if (dump_opt['c'])
1516 		advance |= ADVANCE_DATA;
1517 
1518 	advance |= ADVANCE_PRUNE | ADVANCE_ZIL;
1519 
1520 	(void) printf("\nTraversing all blocks to %sverify"
1521 	    " nothing leaked ...\n",
1522 	    dump_opt['c'] ? "verify checksums and " : "");
1523 
1524 	/*
1525 	 * Load all space maps.  As we traverse the pool, if we find a block
1526 	 * that's not in its space map, that indicates a double-allocation,
1527 	 * reference to a freed block, or an unclaimed block.  Otherwise we
1528 	 * remove the block from the space map.  If the space maps are not
1529 	 * empty when we're done, that indicates leaked blocks.
1530 	 */
1531 	if (!dump_opt['L'])
1532 		zdb_space_map_load(spa);
1533 
1534 	/*
1535 	 * If there's a deferred-free bplist, process that first.
1536 	 */
1537 	if (spa->spa_sync_bplist_obj != 0) {
1538 		bplist_t *bpl = &spa->spa_sync_bplist;
1539 		blkptr_t blk;
1540 		uint64_t itor = 0;
1541 
1542 		VERIFY(0 == bplist_open(bpl, spa->spa_meta_objset,
1543 		    spa->spa_sync_bplist_obj));
1544 
1545 		while (bplist_iterate(bpl, &itor, &blk) == 0) {
1546 			if (dump_opt['b'] >= 4) {
1547 				char blkbuf[BP_SPRINTF_LEN];
1548 				sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &blk);
1549 				(void) printf("[%s] %s\n",
1550 				    "deferred free", blkbuf);
1551 			}
1552 			zdb_count_block(spa, &zcb, &blk, DMU_OT_DEFERRED);
1553 		}
1554 
1555 		bplist_close(bpl);
1556 	}
1557 
1558 	/*
1559 	 * Now traverse the pool.  If we're reading all data to verify
1560 	 * checksums, do a scrubbing read so that we validate all copies.
1561 	 */
1562 	flags = ZIO_FLAG_CANFAIL;
1563 	if (advance & ADVANCE_DATA)
1564 		flags |= ZIO_FLAG_SCRUB;
1565 	th = traverse_init(spa, zdb_blkptr_cb, &zcb, advance, flags);
1566 	th->th_noread = zdb_noread;
1567 
1568 	traverse_add_pool(th, 0, spa_first_txg(spa) + TXG_CONCURRENT_STATES);
1569 
1570 	while (traverse_more(th) == EAGAIN)
1571 		continue;
1572 
1573 	traverse_fini(th);
1574 
1575 	if (zcb.zcb_haderrors) {
1576 		(void) printf("\nError counts:\n\n");
1577 		(void) printf("\t%5s  %s\n", "errno", "count");
1578 		for (e = 0; e < 256; e++) {
1579 			if (zcb.zcb_errors[e] != 0) {
1580 				(void) printf("\t%5d  %llu\n",
1581 				    e, (u_longlong_t)zcb.zcb_errors[e]);
1582 			}
1583 		}
1584 	}
1585 
1586 	/*
1587 	 * Report any leaked segments.
1588 	 */
1589 	if (!dump_opt['L'])
1590 		zdb_space_map_unload(spa);
1591 
1592 	if (dump_opt['L'])
1593 		(void) printf("\n\n *** Live pool traversal; "
1594 		    "block counts are only approximate ***\n\n");
1595 
1596 	alloc = spa_get_alloc(spa);
1597 	space = spa_get_space(spa);
1598 
1599 	tzb = &zcb.zcb_type[ZB_TOTAL][DMU_OT_TOTAL];
1600 
1601 	if (tzb->zb_asize == alloc) {
1602 		(void) printf("\n\tNo leaks (block sum matches space"
1603 		    " maps exactly)\n");
1604 	} else {
1605 		(void) printf("block traversal size %llu != alloc %llu "
1606 		    "(leaked %lld)\n",
1607 		    (u_longlong_t)tzb->zb_asize,
1608 		    (u_longlong_t)alloc,
1609 		    (u_longlong_t)(alloc - tzb->zb_asize));
1610 		leaks = 1;
1611 	}
1612 
1613 	if (tzb->zb_count == 0)
1614 		return (2);
1615 
1616 	(void) printf("\n");
1617 	(void) printf("\tbp count:      %10llu\n",
1618 	    (u_longlong_t)tzb->zb_count);
1619 	(void) printf("\tbp logical:    %10llu\t avg: %6llu\n",
1620 	    (u_longlong_t)tzb->zb_lsize,
1621 	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
1622 	(void) printf("\tbp physical:   %10llu\t avg:"
1623 	    " %6llu\tcompression: %6.2f\n",
1624 	    (u_longlong_t)tzb->zb_psize,
1625 	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
1626 	    (double)tzb->zb_lsize / tzb->zb_psize);
1627 	(void) printf("\tbp allocated:  %10llu\t avg:"
1628 	    " %6llu\tcompression: %6.2f\n",
1629 	    (u_longlong_t)tzb->zb_asize,
1630 	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
1631 	    (double)tzb->zb_lsize / tzb->zb_asize);
1632 	(void) printf("\tSPA allocated: %10llu\tused: %5.2f%%\n",
1633 	    (u_longlong_t)alloc, 100.0 * alloc / space);
1634 
1635 	if (dump_opt['b'] >= 2) {
1636 		int l, t, level;
1637 		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
1638 		    "\t  avg\t comp\t%%Total\tType\n");
1639 
1640 		for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
1641 			char csize[6], lsize[6], psize[6], asize[6], avg[6];
1642 			char *typename;
1643 
1644 			typename = t == DMU_OT_DEFERRED ? "deferred free" :
1645 			    t == DMU_OT_TOTAL ? "Total" : dmu_ot[t].ot_name;
1646 
1647 			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
1648 				(void) printf("%6s\t%5s\t%5s\t%5s"
1649 				    "\t%5s\t%5s\t%6s\t%s\n",
1650 				    "-",
1651 				    "-",
1652 				    "-",
1653 				    "-",
1654 				    "-",
1655 				    "-",
1656 				    "-",
1657 				    typename);
1658 				continue;
1659 			}
1660 
1661 			for (l = ZB_TOTAL - 1; l >= -1; l--) {
1662 				level = (l == -1 ? ZB_TOTAL : l);
1663 				zb = &zcb.zcb_type[level][t];
1664 
1665 				if (zb->zb_asize == 0)
1666 					continue;
1667 
1668 				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
1669 					continue;
1670 
1671 				if (level == 0 && zb->zb_asize ==
1672 				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
1673 					continue;
1674 
1675 				nicenum(zb->zb_count, csize);
1676 				nicenum(zb->zb_lsize, lsize);
1677 				nicenum(zb->zb_psize, psize);
1678 				nicenum(zb->zb_asize, asize);
1679 				nicenum(zb->zb_asize / zb->zb_count, avg);
1680 
1681 				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
1682 				    "\t%5.2f\t%6.2f\t",
1683 				    csize, lsize, psize, asize, avg,
1684 				    (double)zb->zb_lsize / zb->zb_psize,
1685 				    100.0 * zb->zb_asize / tzb->zb_asize);
1686 
1687 				if (level == ZB_TOTAL)
1688 					(void) printf("%s\n", typename);
1689 				else
1690 					(void) printf("    L%d %s\n",
1691 					    level, typename);
1692 			}
1693 		}
1694 	}
1695 
1696 	(void) printf("\n");
1697 
1698 	if (leaks)
1699 		return (2);
1700 
1701 	if (zcb.zcb_haderrors)
1702 		return (3);
1703 
1704 	return (0);
1705 }
1706 
1707 static void
1708 dump_zpool(spa_t *spa)
1709 {
1710 	dsl_pool_t *dp = spa_get_dsl(spa);
1711 	int rc = 0;
1712 
1713 	if (dump_opt['u'])
1714 		dump_uberblock(&spa->spa_uberblock);
1715 
1716 	if (dump_opt['d'] || dump_opt['i']) {
1717 		dump_dir(dp->dp_meta_objset);
1718 		if (dump_opt['d'] >= 3) {
1719 			dump_bplist(dp->dp_meta_objset,
1720 			    spa->spa_sync_bplist_obj, "Deferred frees");
1721 			dump_dtl(spa->spa_root_vdev, 0);
1722 			dump_metaslabs(spa);
1723 		}
1724 		(void) dmu_objset_find(spa->spa_name, dump_one_dir, NULL,
1725 		    DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
1726 	}
1727 
1728 	if (dump_opt['b'] || dump_opt['c'])
1729 		rc = dump_block_stats(spa);
1730 
1731 	if (dump_opt['s'])
1732 		show_pool_stats(spa);
1733 
1734 	if (rc != 0)
1735 		exit(rc);
1736 }
1737 
1738 #define	ZDB_FLAG_CHECKSUM	0x0001
1739 #define	ZDB_FLAG_DECOMPRESS	0x0002
1740 #define	ZDB_FLAG_BSWAP		0x0004
1741 #define	ZDB_FLAG_GBH		0x0008
1742 #define	ZDB_FLAG_INDIRECT	0x0010
1743 #define	ZDB_FLAG_PHYS		0x0020
1744 #define	ZDB_FLAG_RAW		0x0040
1745 #define	ZDB_FLAG_PRINT_BLKPTR	0x0080
1746 
1747 int flagbits[256];
1748 
1749 static void
1750 zdb_print_blkptr(blkptr_t *bp, int flags)
1751 {
1752 	dva_t *dva = bp->blk_dva;
1753 	int d;
1754 
1755 	if (flags & ZDB_FLAG_BSWAP)
1756 		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
1757 	/*
1758 	 * Super-ick warning:  This code is also duplicated in
1759 	 * cmd/mdb/common/modules/zfs/zfs.c .  Yeah, I hate code
1760 	 * replication, too.
1761 	 */
1762 	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1763 		(void) printf("\tDVA[%d]: vdev_id %lld / %llx\n", d,
1764 		    (longlong_t)DVA_GET_VDEV(&dva[d]),
1765 		    (longlong_t)DVA_GET_OFFSET(&dva[d]));
1766 		(void) printf("\tDVA[%d]:       GANG: %-5s  GRID:  %04llx\t"
1767 		    "ASIZE: %llx\n", d,
1768 		    DVA_GET_GANG(&dva[d]) ? "TRUE" : "FALSE",
1769 		    (longlong_t)DVA_GET_GRID(&dva[d]),
1770 		    (longlong_t)DVA_GET_ASIZE(&dva[d]));
1771 		(void) printf("\tDVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", d,
1772 		    (u_longlong_t)DVA_GET_VDEV(&dva[d]),
1773 		    (longlong_t)DVA_GET_OFFSET(&dva[d]),
1774 		    (longlong_t)BP_GET_PSIZE(bp),
1775 		    BP_SHOULD_BYTESWAP(bp) ? "e" : "",
1776 		    !DVA_GET_GANG(&dva[d]) && BP_GET_LEVEL(bp) != 0 ?
1777 		    "d" : "",
1778 		    DVA_GET_GANG(&dva[d]) ? "g" : "",
1779 		    BP_GET_COMPRESS(bp) != 0 ? "d" : "");
1780 	}
1781 	(void) printf("\tLSIZE:  %-16llx\t\tPSIZE: %llx\n",
1782 	    (longlong_t)BP_GET_LSIZE(bp), (longlong_t)BP_GET_PSIZE(bp));
1783 	(void) printf("\tENDIAN: %6s\t\t\t\t\tTYPE:  %s\n",
1784 	    BP_GET_BYTEORDER(bp) ? "LITTLE" : "BIG",
1785 	    dmu_ot[BP_GET_TYPE(bp)].ot_name);
1786 	(void) printf("\tBIRTH:  %-16llx   LEVEL: %-2llu\tFILL:  %llx\n",
1787 	    (u_longlong_t)bp->blk_birth, (u_longlong_t)BP_GET_LEVEL(bp),
1788 	    (u_longlong_t)bp->blk_fill);
1789 	(void) printf("\tCKFUNC: %-16s\t\tCOMP:  %s\n",
1790 	    zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name,
1791 	    zio_compress_table[BP_GET_COMPRESS(bp)].ci_name);
1792 	(void) printf("\tCKSUM:  %llx:%llx:%llx:%llx\n",
1793 	    (u_longlong_t)bp->blk_cksum.zc_word[0],
1794 	    (u_longlong_t)bp->blk_cksum.zc_word[1],
1795 	    (u_longlong_t)bp->blk_cksum.zc_word[2],
1796 	    (u_longlong_t)bp->blk_cksum.zc_word[3]);
1797 }
1798 
1799 static void
1800 zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
1801 {
1802 	int i;
1803 
1804 	for (i = 0; i < nbps; i++)
1805 		zdb_print_blkptr(&bp[i], flags);
1806 }
1807 
1808 static void
1809 zdb_dump_gbh(void *buf, int flags)
1810 {
1811 	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
1812 }
1813 
1814 static void
1815 zdb_dump_block_raw(void *buf, uint64_t size, int flags)
1816 {
1817 	if (flags & ZDB_FLAG_BSWAP)
1818 		byteswap_uint64_array(buf, size);
1819 	(void) write(2, buf, size);
1820 }
1821 
1822 static void
1823 zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
1824 {
1825 	uint64_t *d = (uint64_t *)buf;
1826 	int nwords = size / sizeof (uint64_t);
1827 	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
1828 	int i, j;
1829 	char *hdr, *c;
1830 
1831 
1832 	if (do_bswap)
1833 		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
1834 	else
1835 		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
1836 
1837 	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
1838 
1839 	for (i = 0; i < nwords; i += 2) {
1840 		(void) printf("%06llx:  %016llx  %016llx  ",
1841 		    (u_longlong_t)(i * sizeof (uint64_t)),
1842 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
1843 		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
1844 
1845 		c = (char *)&d[i];
1846 		for (j = 0; j < 2 * sizeof (uint64_t); j++)
1847 			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
1848 		(void) printf("\n");
1849 	}
1850 }
1851 
1852 /*
1853  * There are two acceptable formats:
1854  *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
1855  *	child[.child]*    - For example: 0.1.1
1856  *
1857  * The second form can be used to specify arbitrary vdevs anywhere
1858  * in the heirarchy.  For example, in a pool with a mirror of
1859  * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
1860  */
1861 static vdev_t *
1862 zdb_vdev_lookup(vdev_t *vdev, char *path)
1863 {
1864 	char *s, *p, *q;
1865 	int i;
1866 
1867 	if (vdev == NULL)
1868 		return (NULL);
1869 
1870 	/* First, assume the x.x.x.x format */
1871 	i = (int)strtoul(path, &s, 10);
1872 	if (s == path || (s && *s != '.' && *s != '\0'))
1873 		goto name;
1874 	if (i < 0 || i >= vdev->vdev_children)
1875 		return (NULL);
1876 
1877 	vdev = vdev->vdev_child[i];
1878 	if (*s == '\0')
1879 		return (vdev);
1880 	return (zdb_vdev_lookup(vdev, s+1));
1881 
1882 name:
1883 	for (i = 0; i < vdev->vdev_children; i++) {
1884 		vdev_t *vc = vdev->vdev_child[i];
1885 
1886 		if (vc->vdev_path == NULL) {
1887 			vc = zdb_vdev_lookup(vc, path);
1888 			if (vc == NULL)
1889 				continue;
1890 			else
1891 				return (vc);
1892 		}
1893 
1894 		p = strrchr(vc->vdev_path, '/');
1895 		p = p ? p + 1 : vc->vdev_path;
1896 		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
1897 
1898 		if (strcmp(vc->vdev_path, path) == 0)
1899 			return (vc);
1900 		if (strcmp(p, path) == 0)
1901 			return (vc);
1902 		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
1903 			return (vc);
1904 	}
1905 
1906 	return (NULL);
1907 }
1908 
1909 /*
1910  * Read a block from a pool and print it out.  The syntax of the
1911  * block descriptor is:
1912  *
1913  *	pool:vdev_specifier:offset:size[:flags]
1914  *
1915  *	pool           - The name of the pool you wish to read from
1916  *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
1917  *	offset         - offset, in hex, in bytes
1918  *	size           - Amount of data to read, in hex, in bytes
1919  *	flags          - A string of characters specifying options
1920  *		 b: Decode a blkptr at given offset within block
1921  *		*c: Calculate and display checksums
1922  *		*d: Decompress data before dumping
1923  *		 e: Byteswap data before dumping
1924  *		*g: Display data as a gang block header
1925  *		*i: Display as an indirect block
1926  *		 p: Do I/O to physical offset
1927  *		 r: Dump raw data to stdout
1928  *
1929  *              * = not yet implemented
1930  */
1931 static void
1932 zdb_read_block(char *thing, spa_t **spap)
1933 {
1934 	spa_t *spa = *spap;
1935 	int flags = 0;
1936 	uint64_t offset = 0, size = 0, blkptr_offset = 0;
1937 	zio_t *zio;
1938 	vdev_t *vd;
1939 	void *buf;
1940 	char *s, *p, *dup, *spa_name, *vdev, *flagstr;
1941 	int i, error, zio_flags;
1942 
1943 	dup = strdup(thing);
1944 	s = strtok(dup, ":");
1945 	spa_name = s ? s : "";
1946 	s = strtok(NULL, ":");
1947 	vdev = s ? s : "";
1948 	s = strtok(NULL, ":");
1949 	offset = strtoull(s ? s : "", NULL, 16);
1950 	s = strtok(NULL, ":");
1951 	size = strtoull(s ? s : "", NULL, 16);
1952 	s = strtok(NULL, ":");
1953 	flagstr = s ? s : "";
1954 
1955 	s = NULL;
1956 	if (size == 0)
1957 		s = "size must not be zero";
1958 	if (!IS_P2ALIGNED(size, DEV_BSIZE))
1959 		s = "size must be a multiple of sector size";
1960 	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
1961 		s = "offset must be a multiple of sector size";
1962 	if (s) {
1963 		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
1964 		free(dup);
1965 		return;
1966 	}
1967 
1968 	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
1969 		for (i = 0; flagstr[i]; i++) {
1970 			int bit = flagbits[(uchar_t)flagstr[i]];
1971 
1972 			if (bit == 0) {
1973 				(void) printf("***Invalid flag: %c\n",
1974 				    flagstr[i]);
1975 				continue;
1976 			}
1977 			flags |= bit;
1978 
1979 			/* If it's not something with an argument, keep going */
1980 			if ((bit & (ZDB_FLAG_CHECKSUM | ZDB_FLAG_DECOMPRESS |
1981 			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
1982 				continue;
1983 
1984 			p = &flagstr[i + 1];
1985 			if (bit == ZDB_FLAG_PRINT_BLKPTR)
1986 				blkptr_offset = strtoull(p, &p, 16);
1987 			if (*p != ':' && *p != '\0') {
1988 				(void) printf("***Invalid flag arg: '%s'\n", s);
1989 				free(dup);
1990 				return;
1991 			}
1992 		}
1993 	}
1994 
1995 	if (spa == NULL || spa->spa_name == NULL ||
1996 	    strcmp(spa->spa_name, spa_name)) {
1997 		if (spa && spa->spa_name)
1998 			spa_close(spa, (void *)zdb_read_block);
1999 		error = spa_open(spa_name, spap, (void *)zdb_read_block);
2000 		if (error)
2001 			fatal("Failed to open pool '%s': errno = %d\n",
2002 			    spa_name, error);
2003 		spa = *spap;
2004 	}
2005 
2006 	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
2007 	if (vd == NULL) {
2008 		(void) printf("***Invalid vdev: %s\n", vdev);
2009 		free(dup);
2010 		return;
2011 	} else {
2012 		if (vd->vdev_path)
2013 			(void) printf("Found vdev: %s\n", vd->vdev_path);
2014 		else
2015 			(void) printf("Found vdev type: %s\n",
2016 			    vd->vdev_ops->vdev_op_type);
2017 	}
2018 
2019 	buf = umem_alloc(size, UMEM_NOFAIL);
2020 
2021 	zio_flags = ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
2022 	    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_NOBOOKMARK;
2023 
2024 	if (flags & ZDB_FLAG_PHYS)
2025 		zio_flags |= ZIO_FLAG_PHYSICAL;
2026 
2027 	zio = zio_root(spa, NULL, NULL, 0);
2028 	/* XXX todo - cons up a BP so RAID-Z will be happy */
2029 	zio_nowait(zio_vdev_child_io(zio, NULL, vd, offset, buf, size,
2030 	    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ, zio_flags, NULL, NULL));
2031 	error = zio_wait(zio);
2032 
2033 	if (error) {
2034 		(void) printf("Read of %s failed, error: %d\n", thing, error);
2035 		goto out;
2036 	}
2037 
2038 	if (flags & ZDB_FLAG_PRINT_BLKPTR)
2039 		zdb_print_blkptr((blkptr_t *)(void *)
2040 		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
2041 	else if (flags & ZDB_FLAG_RAW)
2042 		zdb_dump_block_raw(buf, size, flags);
2043 	else if (flags & ZDB_FLAG_INDIRECT)
2044 		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
2045 		    flags);
2046 	else if (flags & ZDB_FLAG_GBH)
2047 		zdb_dump_gbh(buf, flags);
2048 	else
2049 		zdb_dump_block(thing, buf, size, flags);
2050 
2051 out:
2052 	umem_free(buf, size);
2053 	free(dup);
2054 }
2055 
2056 int
2057 main(int argc, char **argv)
2058 {
2059 	int i, c;
2060 	struct rlimit rl = { 1024, 1024 };
2061 	spa_t *spa;
2062 	objset_t *os = NULL;
2063 	char *endstr;
2064 	int dump_all = 1;
2065 	int verbose = 0;
2066 	int error;
2067 	int flag, set;
2068 
2069 	(void) setrlimit(RLIMIT_NOFILE, &rl);
2070 	(void) enable_extended_FILE_stdio(-1, -1);
2071 
2072 	dprintf_setup(&argc, argv);
2073 
2074 	while ((c = getopt(argc, argv, "udibcsvCLO:B:UlR")) != -1) {
2075 		switch (c) {
2076 		case 'u':
2077 		case 'd':
2078 		case 'i':
2079 		case 'b':
2080 		case 'c':
2081 		case 's':
2082 		case 'C':
2083 		case 'l':
2084 		case 'R':
2085 			dump_opt[c]++;
2086 			dump_all = 0;
2087 			break;
2088 		case 'L':
2089 			dump_opt[c]++;
2090 			break;
2091 		case 'O':
2092 			endstr = optarg;
2093 			if (endstr[0] == '!') {
2094 				endstr++;
2095 				set = 0;
2096 			} else {
2097 				set = 1;
2098 			}
2099 			if (strcmp(endstr, "post") == 0) {
2100 				flag = ADVANCE_PRE;
2101 				set = !set;
2102 			} else if (strcmp(endstr, "pre") == 0) {
2103 				flag = ADVANCE_PRE;
2104 			} else if (strcmp(endstr, "prune") == 0) {
2105 				flag = ADVANCE_PRUNE;
2106 			} else if (strcmp(endstr, "data") == 0) {
2107 				flag = ADVANCE_DATA;
2108 			} else if (strcmp(endstr, "holes") == 0) {
2109 				flag = ADVANCE_HOLES;
2110 			} else {
2111 				usage();
2112 			}
2113 			if (set)
2114 				zdb_advance |= flag;
2115 			else
2116 				zdb_advance &= ~flag;
2117 			break;
2118 		case 'B':
2119 			endstr = optarg - 1;
2120 			zdb_noread.zb_objset = strtoull(endstr + 1, &endstr, 0);
2121 			zdb_noread.zb_object = strtoull(endstr + 1, &endstr, 0);
2122 			zdb_noread.zb_level = strtol(endstr + 1, &endstr, 0);
2123 			zdb_noread.zb_blkid = strtoull(endstr + 1, &endstr, 16);
2124 			(void) printf("simulating bad block "
2125 			    "<%llu, %llu, %lld, %llx>\n",
2126 			    (u_longlong_t)zdb_noread.zb_objset,
2127 			    (u_longlong_t)zdb_noread.zb_object,
2128 			    (u_longlong_t)zdb_noread.zb_level,
2129 			    (u_longlong_t)zdb_noread.zb_blkid);
2130 			break;
2131 		case 'v':
2132 			verbose++;
2133 			break;
2134 		case 'U':
2135 			spa_config_dir = "/tmp";
2136 			break;
2137 		default:
2138 			usage();
2139 			break;
2140 		}
2141 	}
2142 
2143 	kernel_init(FREAD);
2144 
2145 	/*
2146 	 * Disable vdev caching.  If we don't do this, live pool traversal
2147 	 * won't make progress because it will never see disk updates.
2148 	 */
2149 	zfs_vdev_cache_size = 0;
2150 
2151 	for (c = 0; c < 256; c++) {
2152 		if (dump_all && c != 'L' && c != 'l' && c != 'R')
2153 			dump_opt[c] = 1;
2154 		if (dump_opt[c])
2155 			dump_opt[c] += verbose;
2156 	}
2157 
2158 	argc -= optind;
2159 	argv += optind;
2160 
2161 	if (argc < 1) {
2162 		if (dump_opt['C']) {
2163 			dump_config(NULL);
2164 			return (0);
2165 		}
2166 		usage();
2167 	}
2168 
2169 	if (dump_opt['l']) {
2170 		dump_label(argv[0]);
2171 		return (0);
2172 	}
2173 
2174 	if (dump_opt['R']) {
2175 		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
2176 		flagbits['c'] = ZDB_FLAG_CHECKSUM;
2177 		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
2178 		flagbits['e'] = ZDB_FLAG_BSWAP;
2179 		flagbits['g'] = ZDB_FLAG_GBH;
2180 		flagbits['i'] = ZDB_FLAG_INDIRECT;
2181 		flagbits['p'] = ZDB_FLAG_PHYS;
2182 		flagbits['r'] = ZDB_FLAG_RAW;
2183 
2184 		spa = NULL;
2185 		while (argv[0]) {
2186 			zdb_read_block(argv[0], &spa);
2187 			argv++;
2188 			argc--;
2189 		}
2190 		if (spa)
2191 			spa_close(spa, (void *)zdb_read_block);
2192 		return (0);
2193 	}
2194 
2195 	if (dump_opt['C'])
2196 		dump_config(argv[0]);
2197 
2198 	if (strchr(argv[0], '/') != NULL) {
2199 		error = dmu_objset_open(argv[0], DMU_OST_ANY,
2200 		    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
2201 	} else {
2202 		error = spa_open(argv[0], &spa, FTAG);
2203 	}
2204 
2205 	if (error)
2206 		fatal("can't open %s: error %d", argv[0], error);
2207 
2208 	argv++;
2209 	if (--argc > 0) {
2210 		zopt_objects = argc;
2211 		zopt_object = calloc(zopt_objects, sizeof (uint64_t));
2212 		for (i = 0; i < zopt_objects; i++) {
2213 			errno = 0;
2214 			zopt_object[i] = strtoull(argv[i], NULL, 0);
2215 			if (zopt_object[i] == 0 && errno != 0)
2216 				fatal("bad object number %s: %s",
2217 				    argv[i], strerror(errno));
2218 		}
2219 	}
2220 
2221 	if (os != NULL) {
2222 		dump_dir(os);
2223 		dmu_objset_close(os);
2224 	} else {
2225 		dump_zpool(spa);
2226 		spa_close(spa, FTAG);
2227 	}
2228 
2229 	kernel_fini();
2230 
2231 	return (0);
2232 }
2233