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
55const char cmdname[] = "zdb";
56uint8_t dump_opt[256];
57
58typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
59
60extern void dump_intent_log(zilog_t *);
61uint64_t *zopt_object = NULL;
62int zopt_objects = 0;
63int zdb_advance = ADVANCE_PRE;
64zbookmark_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 */
70const char *
71_umem_debug_init()
72{
73	return ("default,verbose"); /* $UMEM_DEBUG setting */
74}
75
76const char *
77_umem_logging_init(void)
78{
79	return ("fail,contents"); /* $UMEM_LOGGING setting */
80}
81
82static void
83usage(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
116static void
117fatal(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
130static void
131dump_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 */
193static void
194dump_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
211const char dump_zap_stars[] = "****************************************";
212const int dump_zap_width = sizeof (dump_zap_stars) - 1;
213
214static void
215dump_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
239static void
240dump_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*/
303static void
304dump_none(objset_t *os, uint64_t object, void *data, size_t size)
305{
306}
307
308/*ARGSUSED*/
309void
310dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
311{
312}
313
314/*ARGSUSED*/
315static void
316dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
317{
318}
319
320/*ARGSUSED*/
321static void
322dump_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
370static void
371dump_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
418static void
419dump_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
446static void
447dump_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
475static void
476dump_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*/
518static void
519dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
520{
521}
522
523static uint64_t
524blkid2offset(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
533static void
534sprintf_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 */
556static int
557zdb_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
626out:
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*/
640static void
641dump_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*/
667static void
668dump_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*/
705static void
706dump_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
754static void
755dump_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
804static char *
805znode_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*/
859static void
860dump_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*/
895static void
896dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
897{
898}
899
900/*ARGSUSED*/
901static void
902dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
903{
904}
905
906static 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
940static void
941dump_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
1043static char *objset_types[DMU_OST_NUMTYPES] = {
1044	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1045
1046/*ARGSUSED*/
1047static void
1048dump_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
1129static void
1130dump_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
1149static void
1150dump_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
1164static void
1165dump_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*/
1213static int
1214dump_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
1230static void
1231zdb_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
1252static int
1253zdb_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
1332static void
1333zdb_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
1346static void
1347zdb_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
1367static void
1368zdb_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 */
1390typedef 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
1402typedef 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
1410static void
1411zdb_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
1443static int
1444zdb_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
1500static int
1501dump_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
1707static void
1708dump_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
1747int flagbits[256];
1748
1749static void
1750zdb_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
1799static void
1800zdb_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
1808static void
1809zdb_dump_gbh(void *buf, int flags)
1810{
1811	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
1812}
1813
1814static void
1815zdb_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
1822static void
1823zdb_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 */
1861static vdev_t *
1862zdb_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
1882name:
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 */
1931static void
1932zdb_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
2051out:
2052	umem_free(buf, size);
2053	free(dup);
2054}
2055
2056int
2057main(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