zdb.c revision d80c45e0f58fa434ba37259ea2e2b12e0380c19a
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 <stdlib.h>
30#include <ctype.h>
31#include <sys/zfs_context.h>
32#include <sys/spa.h>
33#include <sys/spa_impl.h>
34#include <sys/dmu.h>
35#include <sys/zap.h>
36#include <sys/fs/zfs.h>
37#include <sys/zfs_znode.h>
38#include <sys/vdev.h>
39#include <sys/vdev_impl.h>
40#include <sys/metaslab_impl.h>
41#include <sys/dmu_objset.h>
42#include <sys/dsl_dir.h>
43#include <sys/dsl_dataset.h>
44#include <sys/dsl_pool.h>
45#include <sys/dbuf.h>
46#include <sys/zil.h>
47#include <sys/zil_impl.h>
48#include <sys/stat.h>
49#include <sys/resource.h>
50#include <sys/dmu_traverse.h>
51#include <sys/zio_checksum.h>
52#include <sys/zio_compress.h>
53
54const char cmdname[] = "zdb";
55uint8_t dump_opt[256];
56
57typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
58
59extern void dump_intent_log(zilog_t *);
60uint64_t *zopt_object = NULL;
61int zopt_objects = 0;
62int zdb_advance = ADVANCE_PRE;
63zbookmark_t zdb_noread = { 0, 0, ZB_NO_LEVEL, 0 };
64
65/*
66 * These libumem hooks provide a reasonable set of defaults for the allocator's
67 * debugging facilities.
68 */
69const char *
70_umem_debug_init()
71{
72	return ("default,verbose"); /* $UMEM_DEBUG setting */
73}
74
75const char *
76_umem_logging_init(void)
77{
78	return ("fail,contents"); /* $UMEM_LOGGING setting */
79}
80
81static void
82usage(void)
83{
84	(void) fprintf(stderr,
85	    "Usage: %s [-udibcsvLU] [-O order] [-B os:obj:level:blkid] "
86	    "dataset [object...]\n"
87	    "       %s -C [pool]\n"
88	    "       %s -l dev\n"
89	    "       %s -R vdev:offset:size:flags\n",
90	    cmdname, cmdname, cmdname, cmdname);
91
92	(void) fprintf(stderr, "	-u uberblock\n");
93	(void) fprintf(stderr, "	-d datasets\n");
94	(void) fprintf(stderr, "        -C cached pool configuration\n");
95	(void) fprintf(stderr, "	-i intent logs\n");
96	(void) fprintf(stderr, "	-b block statistics\n");
97	(void) fprintf(stderr, "	-c checksum all data blocks\n");
98	(void) fprintf(stderr, "	-s report stats on zdb's I/O\n");
99	(void) fprintf(stderr, "	-v verbose (applies to all others)\n");
100	(void) fprintf(stderr, "        -l dump label contents\n");
101	(void) fprintf(stderr, "	-L live pool (allows some errors)\n");
102	(void) fprintf(stderr, "	-O [!]<pre|post|prune|data|holes> "
103	    "visitation order\n");
104	(void) fprintf(stderr, "	-U use zpool.cache in /tmp\n");
105	(void) fprintf(stderr, "	-B objset:object:level:blkid -- "
106	    "simulate bad block\n");
107	(void) fprintf(stderr, "        -R read and display block from a"
108	    "device\n");
109	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
110	    "to make only that option verbose\n");
111	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
112	exit(1);
113}
114
115static void
116fatal(const char *fmt, ...)
117{
118	va_list ap;
119
120	va_start(ap, fmt);
121	(void) fprintf(stderr, "%s: ", cmdname);
122	(void) vfprintf(stderr, fmt, ap);
123	va_end(ap);
124	(void) fprintf(stderr, "\n");
125
126	exit(1);
127}
128
129static void
130dump_nvlist(nvlist_t *list, int indent)
131{
132	nvpair_t *elem = NULL;
133
134	while ((elem = nvlist_next_nvpair(list, elem)) != NULL) {
135		switch (nvpair_type(elem)) {
136		case DATA_TYPE_STRING:
137			{
138				char *value;
139
140				VERIFY(nvpair_value_string(elem, &value) == 0);
141				(void) printf("%*s%s='%s'\n", indent, "",
142				    nvpair_name(elem), value);
143			}
144			break;
145
146		case DATA_TYPE_UINT64:
147			{
148				uint64_t value;
149
150				VERIFY(nvpair_value_uint64(elem, &value) == 0);
151				(void) printf("%*s%s=%llu\n", indent, "",
152				    nvpair_name(elem), (u_longlong_t)value);
153			}
154			break;
155
156		case DATA_TYPE_NVLIST:
157			{
158				nvlist_t *value;
159
160				VERIFY(nvpair_value_nvlist(elem, &value) == 0);
161				(void) printf("%*s%s\n", indent, "",
162				    nvpair_name(elem));
163				dump_nvlist(value, indent + 4);
164			}
165			break;
166
167		case DATA_TYPE_NVLIST_ARRAY:
168			{
169				nvlist_t **value;
170				uint_t c, count;
171
172				VERIFY(nvpair_value_nvlist_array(elem, &value,
173				    &count) == 0);
174
175				for (c = 0; c < count; c++) {
176					(void) printf("%*s%s[%u]\n", indent, "",
177					    nvpair_name(elem), c);
178					dump_nvlist(value[c], indent + 8);
179				}
180			}
181			break;
182
183		default:
184
185			(void) printf("bad config type %d for %s\n",
186			    nvpair_type(elem), nvpair_name(elem));
187		}
188	}
189}
190
191/* ARGSUSED */
192static void
193dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
194{
195	nvlist_t *nv;
196	size_t nvsize = *(uint64_t *)data;
197	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
198
199	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed));
200
201	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
202
203	umem_free(packed, nvsize);
204
205	dump_nvlist(nv, 8);
206
207	nvlist_free(nv);
208}
209
210const char dump_zap_stars[] = "****************************************";
211const int dump_zap_width = sizeof (dump_zap_stars) - 1;
212
213static void
214dump_zap_histogram(uint64_t histo[ZAP_HISTOGRAM_SIZE])
215{
216	int i;
217	int minidx = ZAP_HISTOGRAM_SIZE - 1;
218	int maxidx = 0;
219	uint64_t max = 0;
220
221	for (i = 0; i < ZAP_HISTOGRAM_SIZE; i++) {
222		if (histo[i] > max)
223			max = histo[i];
224		if (histo[i] > 0 && i > maxidx)
225			maxidx = i;
226		if (histo[i] > 0 && i < minidx)
227			minidx = i;
228	}
229
230	if (max < dump_zap_width)
231		max = dump_zap_width;
232
233	for (i = minidx; i <= maxidx; i++)
234		(void) printf("\t\t\t%u: %6llu %s\n", i, (u_longlong_t)histo[i],
235		    &dump_zap_stars[(max - histo[i]) * dump_zap_width / max]);
236}
237
238static void
239dump_zap_stats(objset_t *os, uint64_t object)
240{
241	int error;
242	zap_stats_t zs;
243
244	error = zap_get_stats(os, object, &zs);
245	if (error)
246		return;
247
248	if (zs.zs_ptrtbl_len == 0) {
249		ASSERT(zs.zs_num_blocks == 1);
250		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
251		    (u_longlong_t)zs.zs_blocksize,
252		    (u_longlong_t)zs.zs_num_entries);
253		return;
254	}
255
256	(void) printf("\tFat ZAP stats:\n");
257
258	(void) printf("\t\tPointer table:\n");
259	(void) printf("\t\t\t%llu elements\n",
260	    (u_longlong_t)zs.zs_ptrtbl_len);
261	(void) printf("\t\t\tzt_blk: %llu\n",
262	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
263	(void) printf("\t\t\tzt_numblks: %llu\n",
264	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
265	(void) printf("\t\t\tzt_shift: %llu\n",
266	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
267	(void) printf("\t\t\tzt_blks_copied: %llu\n",
268	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
269	(void) printf("\t\t\tzt_nextblk: %llu\n",
270	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
271
272	(void) printf("\t\tZAP entries: %llu\n",
273	    (u_longlong_t)zs.zs_num_entries);
274	(void) printf("\t\tLeaf blocks: %llu\n",
275	    (u_longlong_t)zs.zs_num_leafs);
276	(void) printf("\t\tTotal blocks: %llu\n",
277	    (u_longlong_t)zs.zs_num_blocks);
278	(void) printf("\t\tzap_block_type: 0x%llx\n",
279	    (u_longlong_t)zs.zs_block_type);
280	(void) printf("\t\tzap_magic: 0x%llx\n",
281	    (u_longlong_t)zs.zs_magic);
282	(void) printf("\t\tzap_salt: 0x%llx\n",
283	    (u_longlong_t)zs.zs_salt);
284
285	(void) printf("\t\tLeafs with 2^n pointers:\n");
286	dump_zap_histogram(zs.zs_leafs_with_2n_pointers);
287
288	(void) printf("\t\tBlocks with n*5 entries:\n");
289	dump_zap_histogram(zs.zs_blocks_with_n5_entries);
290
291	(void) printf("\t\tBlocks n/10 full:\n");
292	dump_zap_histogram(zs.zs_blocks_n_tenths_full);
293
294	(void) printf("\t\tEntries with n chunks:\n");
295	dump_zap_histogram(zs.zs_entries_using_n_chunks);
296
297	(void) printf("\t\tBuckets with n entries:\n");
298	dump_zap_histogram(zs.zs_buckets_with_n_entries);
299}
300
301/*ARGSUSED*/
302static void
303dump_none(objset_t *os, uint64_t object, void *data, size_t size)
304{
305}
306
307/*ARGSUSED*/
308void
309dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
310{
311}
312
313/*ARGSUSED*/
314static void
315dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
316{
317}
318
319/*ARGSUSED*/
320static void
321dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
322{
323	zap_cursor_t zc;
324	zap_attribute_t attr;
325	void *prop;
326	int i;
327
328	dump_zap_stats(os, object);
329	(void) printf("\n");
330
331	for (zap_cursor_init(&zc, os, object);
332	    zap_cursor_retrieve(&zc, &attr) == 0;
333	    zap_cursor_advance(&zc)) {
334		(void) printf("\t\t%s = ", attr.za_name);
335		if (attr.za_num_integers == 0) {
336			(void) printf("\n");
337			continue;
338		}
339		prop = umem_zalloc(attr.za_num_integers *
340		    attr.za_integer_length, UMEM_NOFAIL);
341		(void) zap_lookup(os, object, attr.za_name,
342		    attr.za_integer_length, attr.za_num_integers, prop);
343		if (attr.za_integer_length == 1) {
344			(void) printf("%s", (char *)prop);
345		} else {
346			for (i = 0; i < attr.za_num_integers; i++) {
347				switch (attr.za_integer_length) {
348				case 2:
349					(void) printf("%u ",
350					    ((uint16_t *)prop)[i]);
351					break;
352				case 4:
353					(void) printf("%u ",
354					    ((uint32_t *)prop)[i]);
355					break;
356				case 8:
357					(void) printf("%lld ",
358					    (u_longlong_t)((int64_t *)prop)[i]);
359					break;
360				}
361			}
362		}
363		(void) printf("\n");
364		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
365	}
366	zap_cursor_fini(&zc);
367}
368
369static void
370dump_spacemap(objset_t *os, space_map_obj_t *smo, space_map_t *sm)
371{
372	uint64_t alloc, offset, entry;
373	uint8_t mapshift = sm->sm_shift;
374	uint64_t mapstart = sm->sm_start;
375	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID" };
376
377	if (smo->smo_object == 0)
378		return;
379
380	/*
381	 * Print out the freelist entries in both encoded and decoded form.
382	 */
383	alloc = 0;
384	for (offset = 0; offset < smo->smo_objsize; offset += sizeof (entry)) {
385		VERIFY(0 == dmu_read(os, smo->smo_object, offset,
386		    sizeof (entry), &entry));
387		if (SM_DEBUG_DECODE(entry)) {
388			(void) printf("\t\t[%4llu] %s: txg %llu, pass %llu\n",
389			    (u_longlong_t)(offset / sizeof (entry)),
390			    ddata[SM_DEBUG_ACTION_DECODE(entry)],
391			    SM_DEBUG_TXG_DECODE(entry),
392			    SM_DEBUG_SYNCPASS_DECODE(entry));
393		} else {
394			(void) printf("\t\t[%4llu]    %c  range:"
395			    " %08llx-%08llx  size: %06llx\n",
396			    (u_longlong_t)(offset / sizeof (entry)),
397			    SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
398			    (SM_OFFSET_DECODE(entry) << mapshift) + mapstart,
399			    (SM_OFFSET_DECODE(entry) << mapshift) + mapstart +
400			    (SM_RUN_DECODE(entry) << mapshift),
401			    (SM_RUN_DECODE(entry) << mapshift));
402			if (SM_TYPE_DECODE(entry) == SM_ALLOC)
403				alloc += SM_RUN_DECODE(entry) << mapshift;
404			else
405				alloc -= SM_RUN_DECODE(entry) << mapshift;
406		}
407	}
408	if (alloc != smo->smo_alloc) {
409		(void) printf("space_map_object alloc (%llu) INCONSISTENT "
410		    "with space map summary (%llu)\n",
411		    (u_longlong_t)smo->smo_alloc, (u_longlong_t)alloc);
412	}
413}
414
415static void
416dump_metaslab(metaslab_t *msp)
417{
418	char freebuf[5];
419	space_map_obj_t *smo = &msp->ms_smo;
420	vdev_t *vd = msp->ms_group->mg_vd;
421	spa_t *spa = vd->vdev_spa;
422
423	nicenum(msp->ms_map.sm_size - smo->smo_alloc, freebuf);
424
425	if (dump_opt['d'] <= 5) {
426		(void) printf("\t%10llx   %10llu   %5s\n",
427		    (u_longlong_t)msp->ms_map.sm_start,
428		    (u_longlong_t)smo->smo_object,
429		    freebuf);
430		return;
431	}
432
433	(void) printf(
434	    "\tvdev %llu   offset %08llx   spacemap %4llu   free %5s\n",
435	    (u_longlong_t)vd->vdev_id, (u_longlong_t)msp->ms_map.sm_start,
436	    (u_longlong_t)smo->smo_object, freebuf);
437
438	ASSERT(msp->ms_map.sm_size == (1ULL << vd->vdev_ms_shift));
439
440	dump_spacemap(spa->spa_meta_objset, smo, &msp->ms_map);
441}
442
443static void
444dump_metaslabs(spa_t *spa)
445{
446	vdev_t *rvd = spa->spa_root_vdev;
447	vdev_t *vd;
448	int c, m;
449
450	(void) printf("\nMetaslabs:\n");
451
452	for (c = 0; c < rvd->vdev_children; c++) {
453		vd = rvd->vdev_child[c];
454
455		spa_config_enter(spa, RW_READER, FTAG);
456		(void) printf("\n    vdev %llu = %s\n\n",
457		    (u_longlong_t)vd->vdev_id, vdev_description(vd));
458		spa_config_exit(spa, FTAG);
459
460		if (dump_opt['d'] <= 5) {
461			(void) printf("\t%10s   %10s   %5s\n",
462			    "offset", "spacemap", "free");
463			(void) printf("\t%10s   %10s   %5s\n",
464			    "------", "--------", "----");
465		}
466		for (m = 0; m < vd->vdev_ms_count; m++)
467			dump_metaslab(vd->vdev_ms[m]);
468		(void) printf("\n");
469	}
470}
471
472static void
473dump_dtl(vdev_t *vd, int indent)
474{
475	avl_tree_t *t = &vd->vdev_dtl_map.sm_root;
476	spa_t *spa = vd->vdev_spa;
477	space_seg_t *ss;
478	vdev_t *pvd;
479	int c;
480
481	if (indent == 0)
482		(void) printf("\nDirty time logs:\n\n");
483
484	spa_config_enter(spa, RW_READER, FTAG);
485	(void) printf("\t%*s%s\n", indent, "", vdev_description(vd));
486	spa_config_exit(spa, FTAG);
487
488	for (ss = avl_first(t); ss; ss = AVL_NEXT(t, ss)) {
489		/*
490		 * Everything in this DTL must appear in all parent DTL unions.
491		 */
492		for (pvd = vd; pvd; pvd = pvd->vdev_parent)
493			ASSERT(vdev_dtl_contains(&pvd->vdev_dtl_map,
494			    ss->ss_start, ss->ss_end - ss->ss_start));
495		(void) printf("\t%*soutage [%llu,%llu] length %llu\n",
496		    indent, "",
497		    (u_longlong_t)ss->ss_start,
498		    (u_longlong_t)ss->ss_end - 1,
499		    (u_longlong_t)ss->ss_end - ss->ss_start);
500	}
501
502	(void) printf("\n");
503
504	if (dump_opt['d'] > 5 && vd->vdev_children == 0) {
505		dump_spacemap(vd->vdev_spa->spa_meta_objset, &vd->vdev_dtl,
506		    &vd->vdev_dtl_map);
507		(void) printf("\n");
508	}
509
510	for (c = 0; c < vd->vdev_children; c++)
511		dump_dtl(vd->vdev_child[c], indent + 4);
512}
513
514/*ARGSUSED*/
515static void
516dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
517{
518}
519
520static uint64_t
521blkid2offset(dnode_phys_t *dnp, int level, uint64_t blkid)
522{
523	if (level < 0)
524		return (blkid);
525
526	return ((blkid << (level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
527	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
528}
529
530static void
531sprintf_blkptr_compact(char *blkbuf, blkptr_t *bp, int alldvas)
532{
533	dva_t *dva = bp->blk_dva;
534	int ndvas = alldvas ? BP_GET_NDVAS(bp) : 1;
535	int i;
536
537	blkbuf[0] = '\0';
538
539	for (i = 0; i < ndvas; i++)
540		(void) sprintf(blkbuf + strlen(blkbuf), "%llu:%llx:%llx ",
541		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
542		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
543		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
544
545	(void) sprintf(blkbuf + strlen(blkbuf), "%llxL/%llxP F=%llu B=%llu",
546	    (u_longlong_t)BP_GET_LSIZE(bp),
547	    (u_longlong_t)BP_GET_PSIZE(bp),
548	    (u_longlong_t)bp->blk_fill,
549	    (u_longlong_t)bp->blk_birth);
550}
551
552/* ARGSUSED */
553static int
554zdb_indirect_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a)
555{
556	zbookmark_t *zb = &bc->bc_bookmark;
557	blkptr_t *bp = &bc->bc_blkptr;
558	void *data = bc->bc_data;
559	dnode_phys_t *dnp = bc->bc_dnode;
560	char blkbuf[BP_SPRINTF_LEN + 80];
561	int l;
562
563	if (bc->bc_errno) {
564		(void) sprintf(blkbuf,
565		    "Error %d reading <%llu, %llu, %lld, %llu>: ",
566		    bc->bc_errno,
567		    (u_longlong_t)zb->zb_objset,
568		    (u_longlong_t)zb->zb_object,
569		    (u_longlong_t)zb->zb_level,
570		    (u_longlong_t)zb->zb_blkid);
571		goto out;
572	}
573
574	if (zb->zb_level == -1) {
575		ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
576		ASSERT3U(BP_GET_LEVEL(bp), ==, 0);
577	} else {
578		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
579		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
580	}
581
582	if (zb->zb_level > 0) {
583		uint64_t fill = 0;
584		blkptr_t *bpx, *bpend;
585
586		for (bpx = data, bpend = bpx + BP_GET_LSIZE(bp) / sizeof (*bpx);
587		    bpx < bpend; bpx++) {
588			if (bpx->blk_birth != 0) {
589				fill += bpx->blk_fill;
590			} else {
591				ASSERT(bpx->blk_fill == 0);
592			}
593		}
594		ASSERT3U(fill, ==, bp->blk_fill);
595	}
596
597	if (zb->zb_level == 0 && dnp->dn_type == DMU_OT_DNODE) {
598		uint64_t fill = 0;
599		dnode_phys_t *dnx, *dnend;
600
601		for (dnx = data, dnend = dnx + (BP_GET_LSIZE(bp)>>DNODE_SHIFT);
602		    dnx < dnend; dnx++) {
603			if (dnx->dn_type != DMU_OT_NONE)
604				fill++;
605		}
606		ASSERT3U(fill, ==, bp->blk_fill);
607	}
608
609	(void) sprintf(blkbuf, "%16llx ",
610	    (u_longlong_t)blkid2offset(dnp, zb->zb_level, zb->zb_blkid));
611
612	ASSERT(zb->zb_level >= 0);
613
614	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
615		if (l == zb->zb_level) {
616			(void) sprintf(blkbuf + strlen(blkbuf), "L%llx",
617			    (u_longlong_t)zb->zb_level);
618		} else {
619			(void) sprintf(blkbuf + strlen(blkbuf), " ");
620		}
621	}
622
623out:
624	if (bp->blk_birth == 0) {
625		(void) sprintf(blkbuf + strlen(blkbuf), "<hole>");
626		(void) printf("%s\n", blkbuf);
627	} else {
628		sprintf_blkptr_compact(blkbuf + strlen(blkbuf), bp,
629		    dump_opt['d'] > 5 ? 1 : 0);
630		(void) printf("%s\n", blkbuf);
631	}
632
633	return (bc->bc_errno ? ERESTART : 0);
634}
635
636/*ARGSUSED*/
637static void
638dump_indirect(objset_t *os, uint64_t object, void *data, size_t size)
639{
640	traverse_handle_t *th;
641	uint64_t objset = dmu_objset_id(os);
642	int advance = zdb_advance;
643
644	(void) printf("Indirect blocks:\n");
645
646	if (object == 0)
647		advance |= ADVANCE_DATA;
648
649	th = traverse_init(dmu_objset_spa(os), zdb_indirect_cb, NULL, advance,
650	    ZIO_FLAG_CANFAIL);
651	th->th_noread = zdb_noread;
652
653	traverse_add_dnode(th, 0, -1ULL, objset, object);
654
655	while (traverse_more(th) == EAGAIN)
656		continue;
657
658	(void) printf("\n");
659
660	traverse_fini(th);
661}
662
663/*ARGSUSED*/
664static void
665dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
666{
667	dsl_dir_phys_t *dd = data;
668	time_t crtime;
669	char used[6], compressed[6], uncompressed[6], quota[6], resv[6];
670
671	if (dd == NULL)
672		return;
673
674	ASSERT(size == sizeof (*dd));
675
676	crtime = dd->dd_creation_time;
677	nicenum(dd->dd_used_bytes, used);
678	nicenum(dd->dd_compressed_bytes, compressed);
679	nicenum(dd->dd_uncompressed_bytes, uncompressed);
680	nicenum(dd->dd_quota, quota);
681	nicenum(dd->dd_reserved, resv);
682
683	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
684	(void) printf("\t\thead_dataset_obj = %llu\n",
685	    (u_longlong_t)dd->dd_head_dataset_obj);
686	(void) printf("\t\tparent_dir_obj = %llu\n",
687	    (u_longlong_t)dd->dd_parent_obj);
688	(void) printf("\t\tclone_parent_obj = %llu\n",
689	    (u_longlong_t)dd->dd_clone_parent_obj);
690	(void) printf("\t\tchild_dir_zapobj = %llu\n",
691	    (u_longlong_t)dd->dd_child_dir_zapobj);
692	(void) printf("\t\tused_bytes = %s\n", used);
693	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
694	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
695	(void) printf("\t\tquota = %s\n", quota);
696	(void) printf("\t\treserved = %s\n", resv);
697	(void) printf("\t\tprops_zapobj = %llu\n",
698	    (u_longlong_t)dd->dd_props_zapobj);
699}
700
701/*ARGSUSED*/
702static void
703dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
704{
705	dsl_dataset_phys_t *ds = data;
706	time_t crtime;
707	char used[6], compressed[6], uncompressed[6], unique[6];
708	char blkbuf[BP_SPRINTF_LEN];
709
710	if (ds == NULL)
711		return;
712
713	ASSERT(size == sizeof (*ds));
714	crtime = ds->ds_creation_time;
715	nicenum(ds->ds_used_bytes, used);
716	nicenum(ds->ds_compressed_bytes, compressed);
717	nicenum(ds->ds_uncompressed_bytes, uncompressed);
718	nicenum(ds->ds_unique_bytes, unique);
719	sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ds->ds_bp);
720
721	(void) printf("\t\tdataset_obj = %llu\n",
722	    (u_longlong_t)ds->ds_dir_obj);
723	(void) printf("\t\tprev_snap_obj = %llu\n",
724	    (u_longlong_t)ds->ds_prev_snap_obj);
725	(void) printf("\t\tprev_snap_txg = %llu\n",
726	    (u_longlong_t)ds->ds_prev_snap_txg);
727	(void) printf("\t\tnext_snap_obj = %llu\n",
728	    (u_longlong_t)ds->ds_next_snap_obj);
729	(void) printf("\t\tsnapnames_zapobj = %llu\n",
730	    (u_longlong_t)ds->ds_snapnames_zapobj);
731	(void) printf("\t\tnum_children = %llu\n",
732	    (u_longlong_t)ds->ds_num_children);
733	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
734	(void) printf("\t\tcreation_txg = %llu\n",
735	    (u_longlong_t)ds->ds_creation_txg);
736	(void) printf("\t\tdeadlist_obj = %llu\n",
737	    (u_longlong_t)ds->ds_deadlist_obj);
738	(void) printf("\t\tused_bytes = %s\n", used);
739	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
740	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
741	(void) printf("\t\tunique = %s\n", unique);
742	(void) printf("\t\tfsid_guid = %llu\n",
743	    (u_longlong_t)ds->ds_fsid_guid);
744	(void) printf("\t\tguid = %llu\n",
745	    (u_longlong_t)ds->ds_guid);
746	(void) printf("\t\tinconsistent = %llu\n",
747	    (u_longlong_t)ds->ds_inconsistent);
748	(void) printf("\t\tbp = %s\n", blkbuf);
749}
750
751static void
752dump_bplist(objset_t *mos, uint64_t object, char *name)
753{
754	bplist_t bpl = { 0 };
755	blkptr_t blk, *bp = &blk;
756	uint64_t itor = 0;
757	char numbuf[6];
758
759	if (dump_opt['d'] < 3)
760		return;
761
762	VERIFY(0 == bplist_open(&bpl, mos, object));
763	if (bplist_empty(&bpl)) {
764		bplist_close(&bpl);
765		return;
766	}
767
768	nicenum(bpl.bpl_phys->bpl_bytes, numbuf);
769
770	(void) printf("\n    %s: %llu entries, %s\n",
771	    name, (u_longlong_t)bpl.bpl_phys->bpl_entries, numbuf);
772
773	if (dump_opt['d'] < 5) {
774		bplist_close(&bpl);
775		return;
776	}
777
778	(void) printf("\n");
779
780	while (bplist_iterate(&bpl, &itor, bp) == 0) {
781		char blkbuf[BP_SPRINTF_LEN];
782
783		ASSERT(bp->blk_birth != 0);
784		sprintf_blkptr_compact(blkbuf, bp, dump_opt['d'] > 5 ? 1 : 0);
785		(void) printf("\tItem %3llu: %s\n",
786		    (u_longlong_t)itor - 1, blkbuf);
787	}
788
789	bplist_close(&bpl);
790}
791
792static char *
793znode_path(objset_t *os, uint64_t object, char *pathbuf, size_t size)
794{
795	dmu_buf_t *db;
796	dmu_object_info_t doi;
797	znode_phys_t *zp;
798	uint64_t parent = 0;
799	size_t complen;
800	char component[MAXNAMELEN + 1];
801	char *path;
802	int error;
803
804	path = pathbuf + size;
805	*--path = '\0';
806
807	for (;;) {
808		error = dmu_bonus_hold(os, object, FTAG, &db);
809		if (error)
810			break;
811
812		dmu_object_info_from_db(db, &doi);
813		zp = db->db_data;
814		parent = zp->zp_parent;
815		dmu_buf_rele(db, FTAG);
816
817		if (doi.doi_bonus_type != DMU_OT_ZNODE)
818			break;
819
820		if (parent == object) {
821			if (path[0] != '/')
822				*--path = '/';
823			return (path);
824		}
825
826		if (zap_value_search(os, parent, object, component) != 0)
827			break;
828
829		complen = strlen(component);
830		path -= complen;
831		bcopy(component, path, complen);
832		*--path = '/';
833
834		object = parent;
835	}
836
837	(void) sprintf(component, "???<object#%llu>", (u_longlong_t)object);
838
839	complen = strlen(component);
840	path -= complen;
841	bcopy(component, path, complen);
842
843	return (path);
844}
845
846/*ARGSUSED*/
847static void
848dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
849{
850	znode_phys_t *zp = data;
851	time_t z_crtime, z_atime, z_mtime, z_ctime;
852	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
853
854	ASSERT(size >= sizeof (znode_phys_t));
855
856	if (dump_opt['d'] < 3) {
857		(void) printf("\t%s\n",
858		    znode_path(os, object, path, sizeof (path)));
859		return;
860	}
861
862	z_crtime = (time_t)zp->zp_crtime[0];
863	z_atime = (time_t)zp->zp_atime[0];
864	z_mtime = (time_t)zp->zp_mtime[0];
865	z_ctime = (time_t)zp->zp_ctime[0];
866
867	(void) printf("\tpath	%s\n",
868	    znode_path(os, object, path, sizeof (path)));
869	(void) printf("\tatime	%s", ctime(&z_atime));
870	(void) printf("\tmtime	%s", ctime(&z_mtime));
871	(void) printf("\tctime	%s", ctime(&z_ctime));
872	(void) printf("\tcrtime	%s", ctime(&z_crtime));
873	(void) printf("\tgen	%llu\n", (u_longlong_t)zp->zp_gen);
874	(void) printf("\tmode	%llo\n", (u_longlong_t)zp->zp_mode);
875	(void) printf("\tsize	%llu\n", (u_longlong_t)zp->zp_size);
876	(void) printf("\tparent	%llu\n", (u_longlong_t)zp->zp_parent);
877	(void) printf("\tlinks	%llu\n", (u_longlong_t)zp->zp_links);
878	(void) printf("\txattr	%llu\n", (u_longlong_t)zp->zp_xattr);
879	(void) printf("\trdev	0x%016llx\n", (u_longlong_t)zp->zp_rdev);
880}
881
882/*ARGSUSED*/
883static void
884dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
885{
886}
887
888/*ARGSUSED*/
889static void
890dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
891{
892}
893
894static object_viewer_t *object_viewer[DMU_OT_NUMTYPES] = {
895	dump_none,		/* unallocated			*/
896	dump_zap,		/* object directory		*/
897	dump_uint64,		/* object array			*/
898	dump_none,		/* packed nvlist		*/
899	dump_packed_nvlist,	/* packed nvlist size		*/
900	dump_none,		/* bplist			*/
901	dump_none,		/* bplist header		*/
902	dump_none,		/* SPA space map header		*/
903	dump_none,		/* SPA space map		*/
904	dump_none,		/* ZIL intent log		*/
905	dump_dnode,		/* DMU dnode			*/
906	dump_dmu_objset,	/* DMU objset			*/
907	dump_dsl_dir,		/* DSL directory		*/
908	dump_zap,		/* DSL directory child map	*/
909	dump_zap,		/* DSL dataset snap map		*/
910	dump_zap,		/* DSL props			*/
911	dump_dsl_dataset,	/* DSL dataset			*/
912	dump_znode,		/* ZFS znode			*/
913	dump_acl,		/* ZFS ACL			*/
914	dump_uint8,		/* ZFS plain file		*/
915	dump_zap,		/* ZFS directory		*/
916	dump_zap,		/* ZFS master node		*/
917	dump_zap,		/* ZFS delete queue		*/
918	dump_uint8,		/* zvol object			*/
919	dump_zap,		/* zvol prop			*/
920	dump_uint8,		/* other uint8[]		*/
921	dump_uint64,		/* other uint64[]		*/
922	dump_zap,		/* other ZAP			*/
923	dump_zap,		/* persistent error log		*/
924};
925
926static void
927dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
928{
929	dmu_buf_t *db = NULL;
930	dmu_object_info_t doi;
931	dnode_t *dn;
932	void *bonus = NULL;
933	size_t bsize = 0;
934	char iblk[6], dblk[6], lsize[6], asize[6], bonus_size[6], segsize[6];
935	char aux[50];
936	int error;
937
938	if (*print_header) {
939		(void) printf("\n    Object  lvl   iblk   dblk  lsize"
940		    "  asize  type\n");
941		*print_header = 0;
942	}
943
944	if (object == 0) {
945		dn = os->os->os_meta_dnode;
946	} else {
947		error = dmu_bonus_hold(os, object, FTAG, &db);
948		if (error)
949			fatal("dmu_bonus_hold(%llu) failed, errno %u",
950			    object, error);
951		bonus = db->db_data;
952		bsize = db->db_size;
953		dn = ((dmu_buf_impl_t *)db)->db_dnode;
954	}
955	dmu_object_info_from_dnode(dn, &doi);
956
957	nicenum(doi.doi_metadata_block_size, iblk);
958	nicenum(doi.doi_data_block_size, dblk);
959	nicenum(doi.doi_data_block_size * (doi.doi_max_block_offset + 1),
960	    lsize);
961	nicenum(doi.doi_physical_blks << 9, asize);
962	nicenum(doi.doi_bonus_size, bonus_size);
963
964	aux[0] = '\0';
965
966	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6)
967		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
968		zio_checksum_table[doi.doi_checksum].ci_name);
969
970	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6)
971		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
972		zio_compress_table[doi.doi_compress].ci_name);
973
974	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %s%s\n",
975	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk, lsize,
976	    asize, dmu_ot[doi.doi_type].ot_name, aux);
977
978	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
979		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %s\n",
980		    "", "", "", "", bonus_size, "bonus",
981		    dmu_ot[doi.doi_bonus_type].ot_name);
982	}
983
984	if (verbosity >= 4) {
985		object_viewer[doi.doi_bonus_type](os, object, bonus, bsize);
986		object_viewer[doi.doi_type](os, object, NULL, 0);
987		*print_header = 1;
988	}
989
990	if (verbosity >= 5)
991		dump_indirect(os, object, NULL, 0);
992
993	if (verbosity >= 5) {
994		/*
995		 * Report the list of segments that comprise the object.
996		 */
997		uint64_t start = 0;
998		uint64_t end;
999		uint64_t blkfill = 1;
1000		int minlvl = 1;
1001
1002		if (dn->dn_type == DMU_OT_DNODE) {
1003			minlvl = 0;
1004			blkfill = DNODES_PER_BLOCK;
1005		}
1006
1007		for (;;) {
1008			error = dnode_next_offset(dn, B_FALSE, &start, minlvl,
1009			    blkfill);
1010			if (error)
1011				break;
1012			end = start;
1013			error = dnode_next_offset(dn, B_TRUE, &end, minlvl,
1014			    blkfill);
1015			nicenum(end - start, segsize);
1016			(void) printf("\t\tsegment [%016llx, %016llx)"
1017			    " size %5s\n", (u_longlong_t)start,
1018			    (u_longlong_t)end, segsize);
1019			if (error)
1020				break;
1021			start = end;
1022		}
1023	}
1024
1025	if (db != NULL)
1026		dmu_buf_rele(db, FTAG);
1027}
1028
1029static char *objset_types[DMU_OST_NUMTYPES] = {
1030	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1031
1032/*ARGSUSED*/
1033static void
1034dump_dir(objset_t *os)
1035{
1036	dmu_objset_stats_t dds;
1037	uint64_t object, object_count;
1038	char numbuf[8];
1039	char blkbuf[BP_SPRINTF_LEN];
1040	char osname[MAXNAMELEN];
1041	char *type = "UNKNOWN";
1042	int verbosity = dump_opt['d'];
1043	int print_header = 1;
1044	int i, error;
1045
1046	dmu_objset_stats(os, &dds);
1047
1048	if (dds.dds_type < DMU_OST_NUMTYPES)
1049		type = objset_types[dds.dds_type];
1050
1051	if (dds.dds_type == DMU_OST_META) {
1052		dds.dds_creation_txg = TXG_INITIAL;
1053		dds.dds_last_txg = os->os->os_rootbp.blk_birth;
1054		dds.dds_objects_used = os->os->os_rootbp.blk_fill;
1055		dds.dds_space_refd =
1056		    os->os->os_spa->spa_dsl_pool->dp_mos_dir->dd_used_bytes;
1057	}
1058
1059	ASSERT3U(dds.dds_objects_used, ==, os->os->os_rootbp.blk_fill);
1060
1061	nicenum(dds.dds_space_refd, numbuf);
1062
1063	if (verbosity >= 4) {
1064		(void) strcpy(blkbuf, ", rootbp ");
1065		sprintf_blkptr(blkbuf + strlen(blkbuf),
1066		    BP_SPRINTF_LEN - strlen(blkbuf), &os->os->os_rootbp);
1067	} else {
1068		blkbuf[0] = '\0';
1069	}
1070
1071	dmu_objset_name(os, osname);
1072
1073	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, last_txg %llu, "
1074	    "%s, %llu objects%s\n",
1075	    osname, type, (u_longlong_t)dmu_objset_id(os),
1076	    (u_longlong_t)dds.dds_creation_txg,
1077	    (u_longlong_t)dds.dds_last_txg,
1078	    numbuf,
1079	    (u_longlong_t)dds.dds_objects_used,
1080	    blkbuf);
1081
1082	dump_intent_log(dmu_objset_zil(os));
1083
1084	if (dmu_objset_ds(os) != NULL)
1085		dump_bplist(dmu_objset_pool(os)->dp_meta_objset,
1086		    dmu_objset_ds(os)->ds_phys->ds_deadlist_obj, "Deadlist");
1087
1088	if (verbosity < 2)
1089		return;
1090
1091	if (zopt_objects != 0) {
1092		for (i = 0; i < zopt_objects; i++)
1093			dump_object(os, zopt_object[i], verbosity,
1094			    &print_header);
1095		(void) printf("\n");
1096		return;
1097	}
1098
1099	dump_object(os, 0, verbosity, &print_header);
1100	object_count = 1;
1101
1102	object = 0;
1103	while ((error = dmu_object_next(os, &object, B_FALSE)) == 0) {
1104		dump_object(os, object, verbosity, &print_header);
1105		object_count++;
1106	}
1107
1108	ASSERT3U(object_count, ==, dds.dds_objects_used);
1109
1110	(void) printf("\n");
1111
1112	if (error != ESRCH)
1113		fatal("dmu_object_next() = %d", error);
1114}
1115
1116static void
1117dump_uberblock(uberblock_t *ub)
1118{
1119	time_t timestamp = ub->ub_timestamp;
1120
1121	(void) printf("Uberblock\n\n");
1122	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1123	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1124	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1125	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1126	(void) printf("\ttimestamp = %llu UTC = %s",
1127	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1128	if (dump_opt['u'] >= 3) {
1129		char blkbuf[BP_SPRINTF_LEN];
1130		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ub->ub_rootbp);
1131		(void) printf("\trootbp = %s\n", blkbuf);
1132	}
1133	(void) printf("\n");
1134}
1135
1136static void
1137dump_config(const char *pool)
1138{
1139	spa_t *spa = NULL;
1140
1141	mutex_enter(&spa_namespace_lock);
1142	while ((spa = spa_next(spa)) != NULL) {
1143		if (pool == NULL)
1144			(void) printf("%s\n", spa_name(spa));
1145		if (pool == NULL || strcmp(pool, spa_name(spa)) == 0)
1146			dump_nvlist(spa->spa_config, 4);
1147	}
1148	mutex_exit(&spa_namespace_lock);
1149}
1150
1151static void
1152dump_label(const char *dev)
1153{
1154	int fd;
1155	vdev_label_t label;
1156	char *buf = label.vl_vdev_phys.vp_nvlist;
1157	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
1158	struct stat64 statbuf;
1159	uint64_t psize;
1160	int l;
1161
1162	if ((fd = open64(dev, O_RDONLY)) < 0) {
1163		(void) printf("cannot open '%s': %s\n", dev, strerror(errno));
1164		exit(1);
1165	}
1166
1167	if (fstat64(fd, &statbuf) != 0) {
1168		(void) printf("failed to stat '%s': %s\n", dev,
1169		    strerror(errno));
1170		exit(1);
1171	}
1172
1173	psize = statbuf.st_size;
1174	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
1175
1176	for (l = 0; l < VDEV_LABELS; l++) {
1177
1178		nvlist_t *config = NULL;
1179
1180		(void) printf("--------------------------------------------\n");
1181		(void) printf("LABEL %d\n", l);
1182		(void) printf("--------------------------------------------\n");
1183
1184		if (pread64(fd, &label, sizeof (label),
1185		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
1186			(void) printf("failed to read label %d\n", l);
1187			continue;
1188		}
1189
1190		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
1191			(void) printf("failed to unpack label %d\n", l);
1192			continue;
1193		}
1194		dump_nvlist(config, 4);
1195		nvlist_free(config);
1196	}
1197}
1198
1199/*ARGSUSED*/
1200static void
1201dump_one_dir(char *dsname, void *arg)
1202{
1203	int error;
1204	objset_t *os;
1205
1206	error = dmu_objset_open(dsname, DMU_OST_ANY,
1207	    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
1208	if (error) {
1209		(void) printf("Could not open %s\n", dsname);
1210		return;
1211	}
1212	dump_dir(os);
1213	dmu_objset_close(os);
1214}
1215
1216static void
1217zdb_space_map_load(spa_t *spa)
1218{
1219	vdev_t *rvd = spa->spa_root_vdev;
1220	vdev_t *vd;
1221	int c, m, error;
1222
1223	for (c = 0; c < rvd->vdev_children; c++) {
1224		vd = rvd->vdev_child[c];
1225		for (m = 0; m < vd->vdev_ms_count; m++) {
1226			metaslab_t *msp = vd->vdev_ms[m];
1227			mutex_enter(&msp->ms_lock);
1228			error = space_map_load(&msp->ms_allocmap[0], NULL,
1229			    SM_ALLOC, &msp->ms_smo, spa->spa_meta_objset);
1230			mutex_exit(&msp->ms_lock);
1231			if (error)
1232				fatal("%s bad space map #%d, error %d",
1233				    spa->spa_name, c, error);
1234		}
1235	}
1236}
1237
1238static int
1239zdb_space_map_claim(spa_t *spa, blkptr_t *bp, zbookmark_t *zb)
1240{
1241	dva_t *dva = bp->blk_dva;
1242	vdev_t *vd;
1243	metaslab_t *msp;
1244	space_map_t *allocmap, *freemap;
1245	int error;
1246	int d;
1247	blkptr_t blk = *bp;
1248
1249	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1250		uint64_t vdev = DVA_GET_VDEV(&dva[d]);
1251		uint64_t offset = DVA_GET_OFFSET(&dva[d]);
1252		uint64_t size = DVA_GET_ASIZE(&dva[d]);
1253
1254		if ((vd = vdev_lookup_top(spa, vdev)) == NULL)
1255			return (ENXIO);
1256
1257		if ((offset >> vd->vdev_ms_shift) >= vd->vdev_ms_count)
1258			return (ENXIO);
1259
1260		msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
1261		allocmap = &msp->ms_allocmap[0];
1262		freemap = &msp->ms_freemap[0];
1263
1264		/* Prepare our copy of the bp in case we need to read GBHs */
1265		if (DVA_GET_GANG(&dva[d])) {
1266			size = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
1267			DVA_SET_ASIZE(&blk.blk_dva[d], size);
1268			DVA_SET_GANG(&blk.blk_dva[d], 0);
1269		}
1270
1271		mutex_enter(&msp->ms_lock);
1272		if (space_map_contains(freemap, offset, size)) {
1273			mutex_exit(&msp->ms_lock);
1274			return (EAGAIN);	/* allocated more than once */
1275		}
1276
1277		if (!space_map_contains(allocmap, offset, size)) {
1278			mutex_exit(&msp->ms_lock);
1279			return (ESTALE);	/* not allocated at all */
1280		}
1281
1282		space_map_remove(allocmap, offset, size);
1283		space_map_add(freemap, offset, size);
1284
1285		mutex_exit(&msp->ms_lock);
1286	}
1287
1288	if (BP_IS_GANG(bp)) {
1289		zio_gbh_phys_t gbh;
1290		int g;
1291
1292		/* LINTED - compile time assert */
1293		ASSERT(sizeof (zio_gbh_phys_t) == SPA_GANGBLOCKSIZE);
1294
1295		BP_SET_CHECKSUM(&blk, ZIO_CHECKSUM_GANG_HEADER);
1296		BP_SET_PSIZE(&blk, SPA_GANGBLOCKSIZE);
1297		BP_SET_LSIZE(&blk, SPA_GANGBLOCKSIZE);
1298		BP_SET_COMPRESS(&blk, ZIO_COMPRESS_OFF);
1299		error = zio_wait(zio_read(NULL, spa, &blk, &gbh,
1300		    SPA_GANGBLOCKSIZE, NULL, NULL, ZIO_PRIORITY_SYNC_READ,
1301		    ZIO_FLAG_CANFAIL | ZIO_FLAG_CONFIG_HELD, zb));
1302		if (error)
1303			return (error);
1304		if (BP_SHOULD_BYTESWAP(&blk))
1305			byteswap_uint64_array(&gbh, SPA_GANGBLOCKSIZE);
1306		for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
1307			if (BP_IS_HOLE(&gbh.zg_blkptr[g]))
1308				break;
1309			error = zdb_space_map_claim(spa, &gbh.zg_blkptr[g], zb);
1310			if (error)
1311				return (error);
1312		}
1313	}
1314
1315	return (0);
1316}
1317
1318static void
1319zdb_leak(space_map_t *sm, uint64_t start, uint64_t size)
1320{
1321	metaslab_t *msp;
1322
1323	/* LINTED */
1324	msp = (metaslab_t *)((char *)sm - offsetof(metaslab_t, ms_allocmap[0]));
1325
1326	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
1327	    (u_longlong_t)msp->ms_group->mg_vd->vdev_id,
1328	    (u_longlong_t)start,
1329	    (u_longlong_t)size);
1330}
1331
1332static void
1333zdb_space_map_unload(spa_t *spa)
1334{
1335	vdev_t *rvd = spa->spa_root_vdev;
1336	vdev_t *vd;
1337	int c, m;
1338
1339	for (c = 0; c < rvd->vdev_children; c++) {
1340		vd = rvd->vdev_child[c];
1341		for (m = 0; m < vd->vdev_ms_count; m++) {
1342			metaslab_t *msp = vd->vdev_ms[m];
1343			mutex_enter(&msp->ms_lock);
1344			space_map_vacate(&msp->ms_allocmap[0], zdb_leak,
1345			    &msp->ms_allocmap[0]);
1346			space_map_unload(&msp->ms_allocmap[0]);
1347			space_map_vacate(&msp->ms_freemap[0], NULL, NULL);
1348			mutex_exit(&msp->ms_lock);
1349		}
1350	}
1351}
1352
1353static void
1354zdb_refresh_ubsync(spa_t *spa)
1355{
1356	uberblock_t ub = { 0 };
1357	vdev_t *rvd = spa->spa_root_vdev;
1358	zio_t *zio;
1359
1360	/*
1361	 * Reload the uberblock.
1362	 */
1363	zio = zio_root(spa, NULL, NULL,
1364	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1365	vdev_uberblock_load(zio, rvd, &ub);
1366	(void) zio_wait(zio);
1367
1368	if (ub.ub_txg != 0)
1369		spa->spa_ubsync = ub;
1370}
1371
1372/*
1373 * Verify that the sum of the sizes of all blocks in the pool adds up
1374 * to the SPA's sa_alloc total.
1375 */
1376typedef struct zdb_blkstats {
1377	uint64_t	zb_asize;
1378	uint64_t	zb_lsize;
1379	uint64_t	zb_psize;
1380	uint64_t	zb_count;
1381} zdb_blkstats_t;
1382
1383#define	DMU_OT_DEFERRED	DMU_OT_NONE
1384#define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
1385
1386#define	ZB_TOTAL	ZB_MAXLEVEL
1387
1388typedef struct zdb_cb {
1389	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][DMU_OT_TOTAL + 1];
1390	uint64_t	zcb_errors[256];
1391	traverse_blk_cache_t *zcb_cache;
1392	int		zcb_readfails;
1393	int		zcb_haderrors;
1394} zdb_cb_t;
1395
1396static void
1397zdb_count_block(spa_t *spa, zdb_cb_t *zcb, blkptr_t *bp, int type)
1398{
1399	int i, error;
1400
1401	for (i = 0; i < 4; i++) {
1402		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
1403		int t = (i & 1) ? type : DMU_OT_TOTAL;
1404		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
1405
1406		zb->zb_asize += BP_GET_ASIZE(bp);
1407		zb->zb_lsize += BP_GET_LSIZE(bp);
1408		zb->zb_psize += BP_GET_PSIZE(bp);
1409		zb->zb_count++;
1410	}
1411
1412	if (dump_opt['L'])
1413		return;
1414
1415	error = zdb_space_map_claim(spa, bp, &zcb->zcb_cache->bc_bookmark);
1416
1417	if (error == 0)
1418		return;
1419
1420	if (error == EAGAIN)
1421		(void) fatal("double-allocation, bp=%p", bp);
1422
1423	if (error == ESTALE)
1424		(void) fatal("reference to freed block, bp=%p", bp);
1425
1426	(void) fatal("fatal error %d in bp %p", error, bp);
1427}
1428
1429static int
1430zdb_blkptr_cb(traverse_blk_cache_t *bc, spa_t *spa, void *arg)
1431{
1432	zbookmark_t *zb = &bc->bc_bookmark;
1433	zdb_cb_t *zcb = arg;
1434	blkptr_t *bp = &bc->bc_blkptr;
1435	dmu_object_type_t type = BP_GET_TYPE(bp);
1436	char blkbuf[BP_SPRINTF_LEN];
1437	int error = 0;
1438
1439	if (bc->bc_errno) {
1440		if (zcb->zcb_readfails++ < 10 && dump_opt['L']) {
1441			zdb_refresh_ubsync(spa);
1442			error = EAGAIN;
1443		} else {
1444			zcb->zcb_haderrors = 1;
1445			zcb->zcb_errors[bc->bc_errno]++;
1446			error = ERESTART;
1447		}
1448
1449		if (dump_opt['b'] >= 3 || (dump_opt['b'] >= 2 && bc->bc_errno))
1450			sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1451		else
1452			blkbuf[0] = '\0';
1453
1454		(void) printf("zdb_blkptr_cb: Got error %d reading "
1455		    "<%llu, %llu, %lld, %llx> %s -- %s\n",
1456		    bc->bc_errno,
1457		    (u_longlong_t)zb->zb_objset,
1458		    (u_longlong_t)zb->zb_object,
1459		    (u_longlong_t)zb->zb_level,
1460		    (u_longlong_t)zb->zb_blkid,
1461		    blkbuf,
1462		    error == EAGAIN ? "retrying" : "skipping");
1463
1464		return (error);
1465	}
1466
1467	zcb->zcb_readfails = 0;
1468
1469	ASSERT(!BP_IS_HOLE(bp));
1470
1471	if (dump_opt['b'] >= 4) {
1472		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1473		(void) printf("objset %llu object %llu offset 0x%llx %s\n",
1474		    (u_longlong_t)zb->zb_objset,
1475		    (u_longlong_t)zb->zb_object,
1476		    (u_longlong_t)blkid2offset(bc->bc_dnode,
1477			zb->zb_level, zb->zb_blkid),
1478		    blkbuf);
1479	}
1480
1481	zdb_count_block(spa, zcb, bp, type);
1482
1483	return (0);
1484}
1485
1486static int
1487dump_block_stats(spa_t *spa)
1488{
1489	traverse_handle_t *th;
1490	zdb_cb_t zcb = { 0 };
1491	traverse_blk_cache_t dummy_cache = { 0 };
1492	zdb_blkstats_t *zb, *tzb;
1493	uint64_t alloc, space;
1494	int leaks = 0;
1495	int advance = zdb_advance;
1496	int flags;
1497	int e;
1498
1499	zcb.zcb_cache = &dummy_cache;
1500
1501	if (dump_opt['c'])
1502		advance |= ADVANCE_DATA;
1503
1504	advance |= ADVANCE_PRUNE | ADVANCE_ZIL;
1505
1506	(void) printf("\nTraversing all blocks to %sverify"
1507	    " nothing leaked ...\n",
1508	    dump_opt['c'] ? "verify checksums and " : "");
1509
1510	/*
1511	 * Load all space maps.  As we traverse the pool, if we find a block
1512	 * that's not in its space map, that indicates a double-allocation,
1513	 * reference to a freed block, or an unclaimed block.  Otherwise we
1514	 * remove the block from the space map.  If the space maps are not
1515	 * empty when we're done, that indicates leaked blocks.
1516	 */
1517	if (!dump_opt['L'])
1518		zdb_space_map_load(spa);
1519
1520	/*
1521	 * If there's a deferred-free bplist, process that first.
1522	 */
1523	if (spa->spa_sync_bplist_obj != 0) {
1524		bplist_t *bpl = &spa->spa_sync_bplist;
1525		blkptr_t blk;
1526		uint64_t itor = 0;
1527
1528		VERIFY(0 == bplist_open(bpl, spa->spa_meta_objset,
1529		    spa->spa_sync_bplist_obj));
1530
1531		while (bplist_iterate(bpl, &itor, &blk) == 0) {
1532			if (dump_opt['b'] >= 4) {
1533				char blkbuf[BP_SPRINTF_LEN];
1534				sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &blk);
1535				(void) printf("[%s] %s\n",
1536				    "deferred free", blkbuf);
1537			}
1538			zdb_count_block(spa, &zcb, &blk, DMU_OT_DEFERRED);
1539		}
1540
1541		bplist_close(bpl);
1542	}
1543
1544	/*
1545	 * Now traverse the pool.  If we're reading all data to verify
1546	 * checksums, do a scrubbing read so that we validate all copies.
1547	 */
1548	flags = ZIO_FLAG_CANFAIL;
1549	if (advance & ADVANCE_DATA)
1550		flags |= ZIO_FLAG_SCRUB;
1551	th = traverse_init(spa, zdb_blkptr_cb, &zcb, advance, flags);
1552	th->th_noread = zdb_noread;
1553
1554	traverse_add_pool(th, 0, spa_first_txg(spa) + TXG_CONCURRENT_STATES);
1555
1556	while (traverse_more(th) == EAGAIN)
1557		continue;
1558
1559	traverse_fini(th);
1560
1561	if (zcb.zcb_haderrors) {
1562		(void) printf("\nError counts:\n\n");
1563		(void) printf("\t%5s  %s\n", "errno", "count");
1564		for (e = 0; e < 256; e++) {
1565			if (zcb.zcb_errors[e] != 0) {
1566				(void) printf("\t%5d  %llu\n",
1567				    e, (u_longlong_t)zcb.zcb_errors[e]);
1568			}
1569		}
1570	}
1571
1572	/*
1573	 * Report any leaked segments.
1574	 */
1575	if (!dump_opt['L'])
1576		zdb_space_map_unload(spa);
1577
1578	if (dump_opt['L'])
1579		(void) printf("\n\n *** Live pool traversal; "
1580		    "block counts are only approximate ***\n\n");
1581
1582	alloc = spa_get_alloc(spa);
1583	space = spa_get_space(spa);
1584
1585	tzb = &zcb.zcb_type[ZB_TOTAL][DMU_OT_TOTAL];
1586
1587	if (tzb->zb_asize == alloc) {
1588		(void) printf("\n\tNo leaks (block sum matches space"
1589		    " maps exactly)\n");
1590	} else {
1591		(void) printf("block traversal size %llu != alloc %llu "
1592		    "(leaked %lld)\n",
1593		    (u_longlong_t)tzb->zb_asize,
1594		    (u_longlong_t)alloc,
1595		    (u_longlong_t)(alloc - tzb->zb_asize));
1596		leaks = 1;
1597	}
1598
1599	if (tzb->zb_count == 0)
1600		return (2);
1601
1602	(void) printf("\n");
1603	(void) printf("\tbp count:      %10llu\n",
1604	    (u_longlong_t)tzb->zb_count);
1605	(void) printf("\tbp logical:    %10llu\t avg: %6llu\n",
1606	    (u_longlong_t)tzb->zb_lsize,
1607	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
1608	(void) printf("\tbp physical:   %10llu\t avg:"
1609	    " %6llu\tcompression: %6.2f\n",
1610	    (u_longlong_t)tzb->zb_psize,
1611	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
1612	    (double)tzb->zb_lsize / tzb->zb_psize);
1613	(void) printf("\tbp allocated:  %10llu\t avg:"
1614	    " %6llu\tcompression: %6.2f\n",
1615	    (u_longlong_t)tzb->zb_asize,
1616	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
1617	    (double)tzb->zb_lsize / tzb->zb_asize);
1618	(void) printf("\tSPA allocated: %10llu\tused: %5.2f%%\n",
1619	    (u_longlong_t)alloc, 100.0 * alloc / space);
1620
1621	if (dump_opt['b'] >= 2) {
1622		int l, t, level;
1623		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
1624		    "\t  avg\t comp\t%%Total\tType\n");
1625
1626		for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
1627			char csize[6], lsize[6], psize[6], asize[6], avg[6];
1628			char *typename;
1629
1630			typename = t == DMU_OT_DEFERRED ? "deferred free" :
1631			    t == DMU_OT_TOTAL ? "Total" : dmu_ot[t].ot_name;
1632
1633			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
1634				(void) printf("%6s\t%5s\t%5s\t%5s"
1635				    "\t%5s\t%5s\t%6s\t%s\n",
1636				    "-",
1637				    "-",
1638				    "-",
1639				    "-",
1640				    "-",
1641				    "-",
1642				    "-",
1643				    typename);
1644				continue;
1645			}
1646
1647			for (l = ZB_TOTAL - 1; l >= -1; l--) {
1648				level = (l == -1 ? ZB_TOTAL : l);
1649				zb = &zcb.zcb_type[level][t];
1650
1651				if (zb->zb_asize == 0)
1652					continue;
1653
1654				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
1655					continue;
1656
1657				if (level == 0 && zb->zb_asize ==
1658				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
1659					continue;
1660
1661				nicenum(zb->zb_count, csize);
1662				nicenum(zb->zb_lsize, lsize);
1663				nicenum(zb->zb_psize, psize);
1664				nicenum(zb->zb_asize, asize);
1665				nicenum(zb->zb_asize / zb->zb_count, avg);
1666
1667				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
1668				    "\t%5.2f\t%6.2f\t",
1669				    csize, lsize, psize, asize, avg,
1670				    (double)zb->zb_lsize / zb->zb_psize,
1671				    100.0 * zb->zb_asize / tzb->zb_asize);
1672
1673				if (level == ZB_TOTAL)
1674					(void) printf("%s\n", typename);
1675				else
1676					(void) printf("    L%d %s\n",
1677					    level, typename);
1678			}
1679		}
1680	}
1681
1682	(void) printf("\n");
1683
1684	if (leaks)
1685		return (2);
1686
1687	if (zcb.zcb_haderrors)
1688		return (3);
1689
1690	return (0);
1691}
1692
1693static void
1694dump_zpool(spa_t *spa)
1695{
1696	dsl_pool_t *dp = spa_get_dsl(spa);
1697	int rc = 0;
1698
1699	if (dump_opt['u'])
1700		dump_uberblock(&spa->spa_uberblock);
1701
1702	if (dump_opt['d'] || dump_opt['i']) {
1703		dump_dir(dp->dp_meta_objset);
1704		if (dump_opt['d'] >= 3) {
1705			dump_bplist(dp->dp_meta_objset,
1706			    spa->spa_sync_bplist_obj, "Deferred frees");
1707			dump_dtl(spa->spa_root_vdev, 0);
1708			dump_metaslabs(spa);
1709		}
1710		dmu_objset_find(spa->spa_name, dump_one_dir, NULL,
1711		    DS_FIND_SNAPSHOTS);
1712	}
1713
1714	if (dump_opt['b'] || dump_opt['c'])
1715		rc = dump_block_stats(spa);
1716
1717	if (dump_opt['s'])
1718		show_pool_stats(spa);
1719
1720	if (rc != 0)
1721		exit(rc);
1722}
1723
1724#define	ZDB_FLAG_CHECKSUM	0x0001
1725#define	ZDB_FLAG_DECOMPRESS	0x0002
1726#define	ZDB_FLAG_BSWAP		0x0004
1727#define	ZDB_FLAG_GBH		0x0008
1728#define	ZDB_FLAG_INDIRECT	0x0010
1729#define	ZDB_FLAG_PHYS		0x0020
1730#define	ZDB_FLAG_RAW		0x0040
1731#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
1732
1733int flagbits[256];
1734
1735static void
1736zdb_print_blkptr(blkptr_t *bp, int flags)
1737{
1738	dva_t *dva = bp->blk_dva;
1739	int d;
1740
1741	if (flags & ZDB_FLAG_BSWAP)
1742		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
1743	/*
1744	 * Super-ick warning:  This code is also duplicated in
1745	 * cmd/mdb/common/modules/zfs/zfs.c .  Yeah, I hate code
1746	 * replication, too.
1747	 */
1748	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1749		(void) printf("\tDVA[%d]: vdev_id %lld / %llx\n", d,
1750		    DVA_GET_VDEV(&dva[d]), DVA_GET_OFFSET(&dva[d]));
1751		(void) printf("\tDVA[%d]:       GANG: %-5s  GRID:  %04llx\t"
1752		    "ASIZE: %llx\n", d,
1753		    DVA_GET_GANG(&dva[d]) ? "TRUE" : "FALSE",
1754		    DVA_GET_GRID(&dva[d]), DVA_GET_ASIZE(&dva[d]));
1755		(void) printf("\tDVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", d,
1756		    DVA_GET_VDEV(&dva[d]), DVA_GET_OFFSET(&dva[d]),
1757		    BP_GET_PSIZE(bp),
1758		    BP_SHOULD_BYTESWAP(bp) ? "e" : "",
1759		    !DVA_GET_GANG(&dva[d]) && BP_GET_LEVEL(bp) != 0 ?
1760		    "d" : "",
1761		    DVA_GET_GANG(&dva[d]) ? "g" : "",
1762		    BP_GET_COMPRESS(bp) != 0 ? "d" : "");
1763	}
1764	(void) printf("\tLSIZE:  %-16llx\t\tPSIZE: %llx\n",
1765	    BP_GET_LSIZE(bp), BP_GET_PSIZE(bp));
1766	(void) printf("\tENDIAN: %6s\t\t\t\t\tTYPE:  %s\n",
1767	    BP_GET_BYTEORDER(bp) ? "LITTLE" : "BIG",
1768	    dmu_ot[BP_GET_TYPE(bp)].ot_name);
1769	(void) printf("\tBIRTH:  %-16llx   LEVEL: %-2llu\tFILL:  %llx\n",
1770	    (u_longlong_t)bp->blk_birth, BP_GET_LEVEL(bp),
1771	    (u_longlong_t)bp->blk_fill);
1772	(void) printf("\tCKFUNC: %-16s\t\tCOMP:  %s\n",
1773	    zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name,
1774	    zio_compress_table[BP_GET_COMPRESS(bp)].ci_name);
1775	(void) printf("\tCKSUM:  %llx:%llx:%llx:%llx\n",
1776	    (u_longlong_t)bp->blk_cksum.zc_word[0],
1777	    (u_longlong_t)bp->blk_cksum.zc_word[1],
1778	    (u_longlong_t)bp->blk_cksum.zc_word[2],
1779	    (u_longlong_t)bp->blk_cksum.zc_word[3]);
1780}
1781
1782static void
1783zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
1784{
1785	int i;
1786
1787	for (i = 0; i < nbps; i++)
1788		zdb_print_blkptr(&bp[i], flags);
1789}
1790
1791static void
1792zdb_dump_gbh(void *buf, int flags)
1793{
1794	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
1795}
1796
1797static void
1798zdb_dump_block_raw(void *buf, uint64_t size, int flags)
1799{
1800	if (flags & ZDB_FLAG_BSWAP)
1801		byteswap_uint64_array(buf, size);
1802	(void) write(2, buf, size);
1803}
1804
1805static void
1806zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
1807{
1808	uint64_t *d = (uint64_t *)buf;
1809	int nwords = size / sizeof (uint64_t);
1810	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
1811	int i, j;
1812	char *hdr, *c;
1813
1814
1815	if (do_bswap)
1816		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
1817	else
1818		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
1819
1820	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
1821
1822	for (i = 0; i < nwords; i += 2) {
1823		(void) printf("%06llx:  %016llx  %016llx  ",
1824		    (u_longlong_t)(i * sizeof (uint64_t)),
1825		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
1826		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
1827
1828		c = (char *)&d[i];
1829		for (j = 0; j < 2 * sizeof (uint64_t); j++)
1830			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
1831		(void) printf("\n");
1832	}
1833}
1834
1835/*
1836 * There are two acceptable formats:
1837 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
1838 *	child[.child]*    - For example: 0.1.1
1839 *
1840 * The second form can be used to specify arbitrary vdevs anywhere
1841 * in the heirarchy.  For example, in a pool with a mirror of
1842 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
1843 */
1844static vdev_t *
1845zdb_vdev_lookup(vdev_t *vdev, char *path)
1846{
1847	char *s, *p, *q;
1848	int i;
1849
1850	if (vdev == NULL)
1851		return (NULL);
1852
1853	/* First, assume the x.x.x.x format */
1854	i = (int)strtoul(path, &s, 10);
1855	if (s == path || (s && *s != '.' && *s != '\0'))
1856		goto name;
1857	if (i < 0 || i >= vdev->vdev_children)
1858		return (NULL);
1859
1860	vdev = vdev->vdev_child[i];
1861	if (*s == '\0')
1862		return (vdev);
1863	return (zdb_vdev_lookup(vdev, s+1));
1864
1865name:
1866	for (i = 0; i < vdev->vdev_children; i++) {
1867		vdev_t *vc = vdev->vdev_child[i];
1868
1869		if (vc->vdev_path == NULL) {
1870			vc = zdb_vdev_lookup(vc, path);
1871			if (vc == NULL)
1872				continue;
1873			else
1874				return (vc);
1875		}
1876
1877		p = strrchr(vc->vdev_path, '/');
1878		p = p ? p + 1 : vc->vdev_path;
1879		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
1880
1881		if (strcmp(vc->vdev_path, path) == 0)
1882			return (vc);
1883		if (strcmp(p, path) == 0)
1884			return (vc);
1885		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
1886			return (vc);
1887	}
1888
1889	return (NULL);
1890}
1891
1892/*
1893 * Read a block from a pool and print it out.  The syntax of the
1894 * block descriptor is:
1895 *
1896 *	pool:vdev_specifier:offset:size[:flags]
1897 *
1898 *	pool           - The name of the pool you wish to read from
1899 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
1900 *	offset         - offset, in hex, in bytes
1901 *	size           - Amount of data to read, in hex, in bytes
1902 *	flags          - A string of characters specifying options
1903 *		 b: Decode a blkptr at given offset within block
1904 *		*c: Calculate and display checksums
1905 *		*d: Decompress data before dumping
1906 *		 e: Byteswap data before dumping
1907 *		*g: Display data as a gang block header
1908 *		*i: Display as an indirect block
1909 *		 p: Do I/O to physical offset
1910 *		 r: Dump raw data to stdout
1911 *
1912 *              * = not yet implemented
1913 */
1914static void
1915zdb_read_block(char *thing, spa_t **spap)
1916{
1917	spa_t *spa = *spap;
1918	int flags = 0;
1919	uint64_t offset = 0, size = 0, blkptr_offset = 0;
1920	zio_t *zio;
1921	vdev_t *vd;
1922	void *buf;
1923	char *s, *p, *dup, *spa_name, *vdev, *flagstr;
1924	int i, error, zio_flags;
1925
1926	dup = strdup(thing);
1927	s = strtok(dup, ":");
1928	spa_name = s ? s : "";
1929	s = strtok(NULL, ":");
1930	vdev = s ? s : "";
1931	s = strtok(NULL, ":");
1932	offset = strtoull(s ? s : "", NULL, 16);
1933	s = strtok(NULL, ":");
1934	size = strtoull(s ? s : "", NULL, 16);
1935	s = strtok(NULL, ":");
1936	flagstr = s ? s : "";
1937
1938	s = NULL;
1939	if (size == 0)
1940		s = "size must not be zero";
1941	if (!IS_P2ALIGNED(size, DEV_BSIZE))
1942		s = "size must be a multiple of sector size";
1943	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
1944		s = "offset must be a multiple of sector size";
1945	if (s) {
1946		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
1947		free(dup);
1948		return;
1949	}
1950
1951	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
1952		for (i = 0; flagstr[i]; i++) {
1953			int bit = flagbits[flagstr[i]];
1954
1955			if (bit == 0) {
1956				(void) printf("***Invalid flag: %c\n",
1957				    flagstr[i]);
1958				continue;
1959			}
1960			flags |= bit;
1961
1962			/* If it's not something with an argument, keep going */
1963			if ((bit & (ZDB_FLAG_CHECKSUM | ZDB_FLAG_DECOMPRESS |
1964			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
1965				continue;
1966
1967			p = &flagstr[i + 1];
1968			if (bit == ZDB_FLAG_PRINT_BLKPTR)
1969				blkptr_offset = strtoull(p, &p, 16);
1970			if (*p != ':' && *p != '\0') {
1971				(void) printf("***Invalid flag arg: '%s'\n", s);
1972				free(dup);
1973				return;
1974			}
1975		}
1976	}
1977
1978	if (spa == NULL || spa->spa_name == NULL ||
1979	    strcmp(spa->spa_name, spa_name)) {
1980		if (spa && spa->spa_name)
1981			spa_close(spa, (void *)zdb_read_block);
1982		error = spa_open(spa_name, spap, (void *)zdb_read_block);
1983		if (error)
1984			fatal("Failed to open pool '%s': errno = %d\n",
1985			    spa_name, error);
1986		spa = *spap;
1987	}
1988
1989	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
1990	if (vd == NULL) {
1991		(void) printf("***Invalid vdev: %s\n", vdev);
1992		free(dup);
1993		return;
1994	} else {
1995		if (vd->vdev_path)
1996			(void) printf("Found vdev: %s\n", vd->vdev_path);
1997		else
1998			(void) printf("Found vdev type: %s\n",
1999			    vd->vdev_ops->vdev_op_type);
2000	}
2001
2002	buf = umem_alloc(size, UMEM_NOFAIL);
2003
2004	zio_flags = ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
2005	    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_NOBOOKMARK;
2006
2007	if (flags & ZDB_FLAG_PHYS)
2008		zio_flags |= ZIO_FLAG_PHYSICAL;
2009
2010	zio = zio_root(spa, NULL, NULL, 0);
2011	/* XXX todo - cons up a BP so RAID-Z will be happy */
2012	zio_nowait(zio_vdev_child_io(zio, NULL, vd, offset, buf, size,
2013	    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ, zio_flags, NULL, NULL));
2014	error = zio_wait(zio);
2015
2016	if (error) {
2017		(void) printf("Read of %s failed, error: %d\n", thing, error);
2018		goto out;
2019	}
2020
2021	if (flags & ZDB_FLAG_PRINT_BLKPTR)
2022		zdb_print_blkptr((blkptr_t *)(void *)
2023		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
2024	else if (flags & ZDB_FLAG_RAW)
2025		zdb_dump_block_raw(buf, size, flags);
2026	else if (flags & ZDB_FLAG_INDIRECT)
2027		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
2028		    flags);
2029	else if (flags & ZDB_FLAG_GBH)
2030		zdb_dump_gbh(buf, flags);
2031	else
2032		zdb_dump_block(thing, buf, size, flags);
2033
2034out:
2035	umem_free(buf, size);
2036	free(dup);
2037}
2038
2039int
2040main(int argc, char **argv)
2041{
2042	int i, c;
2043	struct rlimit rl = { 1024, 1024 };
2044	spa_t *spa;
2045	objset_t *os = NULL;
2046	char *endstr;
2047	int dump_all = 1;
2048	int verbose = 0;
2049	int error;
2050	int flag, set;
2051	vdev_knob_t *vk;
2052
2053	(void) setrlimit(RLIMIT_NOFILE, &rl);
2054
2055	dprintf_setup(&argc, argv);
2056
2057	while ((c = getopt(argc, argv, "udibcsvCLO:B:UlR")) != -1) {
2058		switch (c) {
2059		case 'u':
2060		case 'd':
2061		case 'i':
2062		case 'b':
2063		case 'c':
2064		case 's':
2065		case 'C':
2066		case 'l':
2067		case 'R':
2068			dump_opt[c]++;
2069			dump_all = 0;
2070			break;
2071		case 'L':
2072			dump_opt[c]++;
2073			break;
2074		case 'O':
2075			endstr = optarg;
2076			if (endstr[0] == '!') {
2077				endstr++;
2078				set = 0;
2079			} else {
2080				set = 1;
2081			}
2082			if (strcmp(endstr, "post") == 0) {
2083				flag = ADVANCE_PRE;
2084				set = !set;
2085			} else if (strcmp(endstr, "pre") == 0) {
2086				flag = ADVANCE_PRE;
2087			} else if (strcmp(endstr, "prune") == 0) {
2088				flag = ADVANCE_PRUNE;
2089			} else if (strcmp(endstr, "data") == 0) {
2090				flag = ADVANCE_DATA;
2091			} else if (strcmp(endstr, "holes") == 0) {
2092				flag = ADVANCE_HOLES;
2093			} else {
2094				usage();
2095			}
2096			if (set)
2097				zdb_advance |= flag;
2098			else
2099				zdb_advance &= ~flag;
2100			break;
2101		case 'B':
2102			endstr = optarg - 1;
2103			zdb_noread.zb_objset = strtoull(endstr + 1, &endstr, 0);
2104			zdb_noread.zb_object = strtoull(endstr + 1, &endstr, 0);
2105			zdb_noread.zb_level = strtol(endstr + 1, &endstr, 0);
2106			zdb_noread.zb_blkid = strtoull(endstr + 1, &endstr, 16);
2107			(void) printf("simulating bad block "
2108			    "<%llu, %llu, %lld, %llx>\n",
2109			    (u_longlong_t)zdb_noread.zb_objset,
2110			    (u_longlong_t)zdb_noread.zb_object,
2111			    (u_longlong_t)zdb_noread.zb_level,
2112			    (u_longlong_t)zdb_noread.zb_blkid);
2113			break;
2114		case 'v':
2115			verbose++;
2116			break;
2117		case 'U':
2118			spa_config_dir = "/tmp";
2119			break;
2120		default:
2121			usage();
2122			break;
2123		}
2124	}
2125
2126	kernel_init(FREAD);
2127
2128	/*
2129	 * Disable vdev caching.  If we don't do this, live pool traversal
2130	 * won't make progress because it will never see disk updates.
2131	 */
2132	for (vk = vdev_knob_next(NULL); vk != NULL; vk = vdev_knob_next(vk)) {
2133		if (strcmp(vk->vk_name, "cache_size") == 0)
2134			vk->vk_default = 0;
2135	}
2136
2137	for (c = 0; c < 256; c++) {
2138		if (dump_all && c != 'L' && c != 'l' && c != 'R')
2139			dump_opt[c] = 1;
2140		if (dump_opt[c])
2141			dump_opt[c] += verbose;
2142	}
2143
2144	argc -= optind;
2145	argv += optind;
2146
2147	if (argc < 1) {
2148		if (dump_opt['C']) {
2149			dump_config(NULL);
2150			return (0);
2151		}
2152		usage();
2153	}
2154
2155	if (dump_opt['l']) {
2156		dump_label(argv[0]);
2157		return (0);
2158	}
2159
2160	if (dump_opt['R']) {
2161		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
2162		flagbits['c'] = ZDB_FLAG_CHECKSUM;
2163		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
2164		flagbits['e'] = ZDB_FLAG_BSWAP;
2165		flagbits['g'] = ZDB_FLAG_GBH;
2166		flagbits['i'] = ZDB_FLAG_INDIRECT;
2167		flagbits['p'] = ZDB_FLAG_PHYS;
2168		flagbits['r'] = ZDB_FLAG_RAW;
2169
2170		spa = NULL;
2171		while (argv[0]) {
2172			zdb_read_block(argv[0], &spa);
2173			argv++;
2174			argc--;
2175		}
2176		if (spa)
2177			spa_close(spa, (void *)zdb_read_block);
2178		return (0);
2179	}
2180
2181	if (dump_opt['C'])
2182		dump_config(argv[0]);
2183
2184	if (strchr(argv[0], '/') != NULL) {
2185		error = dmu_objset_open(argv[0], DMU_OST_ANY,
2186		    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
2187	} else {
2188		error = spa_open(argv[0], &spa, FTAG);
2189	}
2190
2191	if (error)
2192		fatal("can't open %s: error %d", argv[0], error);
2193
2194	argv++;
2195	if (--argc > 0) {
2196		zopt_objects = argc;
2197		zopt_object = calloc(zopt_objects, sizeof (uint64_t));
2198		for (i = 0; i < zopt_objects; i++) {
2199			errno = 0;
2200			zopt_object[i] = strtoull(argv[i], NULL, 0);
2201			if (zopt_object[i] == 0 && errno != 0)
2202				fatal("bad object number %s: %s",
2203				    argv[i], strerror(errno));
2204		}
2205	}
2206
2207	if (os != NULL) {
2208		dump_dir(os);
2209		dmu_objset_close(os);
2210	} else {
2211		dump_zpool(spa);
2212		spa_close(spa, FTAG);
2213	}
2214
2215	kernel_fini();
2216
2217	return (0);
2218}
2219