zdb.c revision 5ad820458efd0fdb914baff9c1447c22b819fa23
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};
937
938static void
939dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
940{
941	dmu_buf_t *db = NULL;
942	dmu_object_info_t doi;
943	dnode_t *dn;
944	void *bonus = NULL;
945	size_t bsize = 0;
946	char iblk[6], dblk[6], lsize[6], asize[6], bonus_size[6], segsize[6];
947	char aux[50];
948	int error;
949
950	if (*print_header) {
951		(void) printf("\n    Object  lvl   iblk   dblk  lsize"
952		    "  asize  type\n");
953		*print_header = 0;
954	}
955
956	if (object == 0) {
957		dn = os->os->os_meta_dnode;
958	} else {
959		error = dmu_bonus_hold(os, object, FTAG, &db);
960		if (error)
961			fatal("dmu_bonus_hold(%llu) failed, errno %u",
962			    object, error);
963		bonus = db->db_data;
964		bsize = db->db_size;
965		dn = ((dmu_buf_impl_t *)db)->db_dnode;
966	}
967	dmu_object_info_from_dnode(dn, &doi);
968
969	nicenum(doi.doi_metadata_block_size, iblk);
970	nicenum(doi.doi_data_block_size, dblk);
971	nicenum(doi.doi_data_block_size * (doi.doi_max_block_offset + 1),
972	    lsize);
973	nicenum(doi.doi_physical_blks << 9, asize);
974	nicenum(doi.doi_bonus_size, bonus_size);
975
976	aux[0] = '\0';
977
978	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6)
979		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
980		zio_checksum_table[doi.doi_checksum].ci_name);
981
982	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6)
983		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
984		zio_compress_table[doi.doi_compress].ci_name);
985
986	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %s%s\n",
987	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk, lsize,
988	    asize, dmu_ot[doi.doi_type].ot_name, aux);
989
990	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
991		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %s\n",
992		    "", "", "", "", bonus_size, "bonus",
993		    dmu_ot[doi.doi_bonus_type].ot_name);
994	}
995
996	if (verbosity >= 4) {
997		object_viewer[doi.doi_bonus_type](os, object, bonus, bsize);
998		object_viewer[doi.doi_type](os, object, NULL, 0);
999		*print_header = 1;
1000	}
1001
1002	if (verbosity >= 5)
1003		dump_indirect(os, object, NULL, 0);
1004
1005	if (verbosity >= 5) {
1006		/*
1007		 * Report the list of segments that comprise the object.
1008		 */
1009		uint64_t start = 0;
1010		uint64_t end;
1011		uint64_t blkfill = 1;
1012		int minlvl = 1;
1013
1014		if (dn->dn_type == DMU_OT_DNODE) {
1015			minlvl = 0;
1016			blkfill = DNODES_PER_BLOCK;
1017		}
1018
1019		for (;;) {
1020			error = dnode_next_offset(dn, B_FALSE, &start, minlvl,
1021			    blkfill);
1022			if (error)
1023				break;
1024			end = start;
1025			error = dnode_next_offset(dn, B_TRUE, &end, minlvl,
1026			    blkfill);
1027			nicenum(end - start, segsize);
1028			(void) printf("\t\tsegment [%016llx, %016llx)"
1029			    " size %5s\n", (u_longlong_t)start,
1030			    (u_longlong_t)end, segsize);
1031			if (error)
1032				break;
1033			start = end;
1034		}
1035	}
1036
1037	if (db != NULL)
1038		dmu_buf_rele(db, FTAG);
1039}
1040
1041static char *objset_types[DMU_OST_NUMTYPES] = {
1042	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1043
1044/*ARGSUSED*/
1045static void
1046dump_dir(objset_t *os)
1047{
1048	dmu_objset_stats_t dds;
1049	uint64_t object, object_count;
1050	char numbuf[8];
1051	char blkbuf[BP_SPRINTF_LEN];
1052	char osname[MAXNAMELEN];
1053	char *type = "UNKNOWN";
1054	int verbosity = dump_opt['d'];
1055	int print_header = 1;
1056	int i, error;
1057
1058	dmu_objset_stats(os, &dds);
1059
1060	if (dds.dds_type < DMU_OST_NUMTYPES)
1061		type = objset_types[dds.dds_type];
1062
1063	if (dds.dds_type == DMU_OST_META) {
1064		dds.dds_creation_txg = TXG_INITIAL;
1065		dds.dds_last_txg = os->os->os_rootbp.blk_birth;
1066		dds.dds_objects_used = os->os->os_rootbp.blk_fill;
1067		dds.dds_space_refd =
1068		    os->os->os_spa->spa_dsl_pool->dp_mos_dir->dd_used_bytes;
1069	}
1070
1071	ASSERT3U(dds.dds_objects_used, ==, os->os->os_rootbp.blk_fill);
1072
1073	nicenum(dds.dds_space_refd, numbuf);
1074
1075	if (verbosity >= 4) {
1076		(void) strcpy(blkbuf, ", rootbp ");
1077		sprintf_blkptr(blkbuf + strlen(blkbuf),
1078		    BP_SPRINTF_LEN - strlen(blkbuf), &os->os->os_rootbp);
1079	} else {
1080		blkbuf[0] = '\0';
1081	}
1082
1083	dmu_objset_name(os, osname);
1084
1085	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, last_txg %llu, "
1086	    "%s, %llu objects%s\n",
1087	    osname, type, (u_longlong_t)dmu_objset_id(os),
1088	    (u_longlong_t)dds.dds_creation_txg,
1089	    (u_longlong_t)dds.dds_last_txg,
1090	    numbuf,
1091	    (u_longlong_t)dds.dds_objects_used,
1092	    blkbuf);
1093
1094	dump_intent_log(dmu_objset_zil(os));
1095
1096	if (dmu_objset_ds(os) != NULL)
1097		dump_bplist(dmu_objset_pool(os)->dp_meta_objset,
1098		    dmu_objset_ds(os)->ds_phys->ds_deadlist_obj, "Deadlist");
1099
1100	if (verbosity < 2)
1101		return;
1102
1103	if (zopt_objects != 0) {
1104		for (i = 0; i < zopt_objects; i++)
1105			dump_object(os, zopt_object[i], verbosity,
1106			    &print_header);
1107		(void) printf("\n");
1108		return;
1109	}
1110
1111	dump_object(os, 0, verbosity, &print_header);
1112	object_count = 1;
1113
1114	object = 0;
1115	while ((error = dmu_object_next(os, &object, B_FALSE)) == 0) {
1116		dump_object(os, object, verbosity, &print_header);
1117		object_count++;
1118	}
1119
1120	ASSERT3U(object_count, ==, dds.dds_objects_used);
1121
1122	(void) printf("\n");
1123
1124	if (error != ESRCH)
1125		fatal("dmu_object_next() = %d", error);
1126}
1127
1128static void
1129dump_uberblock(uberblock_t *ub)
1130{
1131	time_t timestamp = ub->ub_timestamp;
1132
1133	(void) printf("Uberblock\n\n");
1134	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1135	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1136	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1137	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1138	(void) printf("\ttimestamp = %llu UTC = %s",
1139	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1140	if (dump_opt['u'] >= 3) {
1141		char blkbuf[BP_SPRINTF_LEN];
1142		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ub->ub_rootbp);
1143		(void) printf("\trootbp = %s\n", blkbuf);
1144	}
1145	(void) printf("\n");
1146}
1147
1148static void
1149dump_config(const char *pool)
1150{
1151	spa_t *spa = NULL;
1152
1153	mutex_enter(&spa_namespace_lock);
1154	while ((spa = spa_next(spa)) != NULL) {
1155		if (pool == NULL)
1156			(void) printf("%s\n", spa_name(spa));
1157		if (pool == NULL || strcmp(pool, spa_name(spa)) == 0)
1158			dump_nvlist(spa->spa_config, 4);
1159	}
1160	mutex_exit(&spa_namespace_lock);
1161}
1162
1163static void
1164dump_label(const char *dev)
1165{
1166	int fd;
1167	vdev_label_t label;
1168	char *buf = label.vl_vdev_phys.vp_nvlist;
1169	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
1170	struct stat64 statbuf;
1171	uint64_t psize;
1172	int l;
1173
1174	if ((fd = open64(dev, O_RDONLY)) < 0) {
1175		(void) printf("cannot open '%s': %s\n", dev, strerror(errno));
1176		exit(1);
1177	}
1178
1179	if (fstat64(fd, &statbuf) != 0) {
1180		(void) printf("failed to stat '%s': %s\n", dev,
1181		    strerror(errno));
1182		exit(1);
1183	}
1184
1185	psize = statbuf.st_size;
1186	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
1187
1188	for (l = 0; l < VDEV_LABELS; l++) {
1189
1190		nvlist_t *config = NULL;
1191
1192		(void) printf("--------------------------------------------\n");
1193		(void) printf("LABEL %d\n", l);
1194		(void) printf("--------------------------------------------\n");
1195
1196		if (pread64(fd, &label, sizeof (label),
1197		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
1198			(void) printf("failed to read label %d\n", l);
1199			continue;
1200		}
1201
1202		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
1203			(void) printf("failed to unpack label %d\n", l);
1204			continue;
1205		}
1206		dump_nvlist(config, 4);
1207		nvlist_free(config);
1208	}
1209}
1210
1211/*ARGSUSED*/
1212static int
1213dump_one_dir(char *dsname, void *arg)
1214{
1215	int error;
1216	objset_t *os;
1217
1218	error = dmu_objset_open(dsname, DMU_OST_ANY,
1219	    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
1220	if (error) {
1221		(void) printf("Could not open %s\n", dsname);
1222		return (0);
1223	}
1224	dump_dir(os);
1225	dmu_objset_close(os);
1226	return (0);
1227}
1228
1229static void
1230zdb_space_map_load(spa_t *spa)
1231{
1232	vdev_t *rvd = spa->spa_root_vdev;
1233	vdev_t *vd;
1234	int c, m, error;
1235
1236	for (c = 0; c < rvd->vdev_children; c++) {
1237		vd = rvd->vdev_child[c];
1238		for (m = 0; m < vd->vdev_ms_count; m++) {
1239			metaslab_t *msp = vd->vdev_ms[m];
1240			mutex_enter(&msp->ms_lock);
1241			error = space_map_load(&msp->ms_allocmap[0], NULL,
1242			    SM_ALLOC, &msp->ms_smo, spa->spa_meta_objset);
1243			mutex_exit(&msp->ms_lock);
1244			if (error)
1245				fatal("%s bad space map #%d, error %d",
1246				    spa->spa_name, c, error);
1247		}
1248	}
1249}
1250
1251static int
1252zdb_space_map_claim(spa_t *spa, blkptr_t *bp, zbookmark_t *zb)
1253{
1254	dva_t *dva = bp->blk_dva;
1255	vdev_t *vd;
1256	metaslab_t *msp;
1257	space_map_t *allocmap, *freemap;
1258	int error;
1259	int d;
1260	blkptr_t blk = *bp;
1261
1262	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1263		uint64_t vdev = DVA_GET_VDEV(&dva[d]);
1264		uint64_t offset = DVA_GET_OFFSET(&dva[d]);
1265		uint64_t size = DVA_GET_ASIZE(&dva[d]);
1266
1267		if ((vd = vdev_lookup_top(spa, vdev)) == NULL)
1268			return (ENXIO);
1269
1270		if ((offset >> vd->vdev_ms_shift) >= vd->vdev_ms_count)
1271			return (ENXIO);
1272
1273		msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
1274		allocmap = &msp->ms_allocmap[0];
1275		freemap = &msp->ms_freemap[0];
1276
1277		/* Prepare our copy of the bp in case we need to read GBHs */
1278		if (DVA_GET_GANG(&dva[d])) {
1279			size = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
1280			DVA_SET_ASIZE(&blk.blk_dva[d], size);
1281			DVA_SET_GANG(&blk.blk_dva[d], 0);
1282		}
1283
1284		mutex_enter(&msp->ms_lock);
1285		if (space_map_contains(freemap, offset, size)) {
1286			mutex_exit(&msp->ms_lock);
1287			return (EAGAIN);	/* allocated more than once */
1288		}
1289
1290		if (!space_map_contains(allocmap, offset, size)) {
1291			mutex_exit(&msp->ms_lock);
1292			return (ESTALE);	/* not allocated at all */
1293		}
1294
1295		space_map_remove(allocmap, offset, size);
1296		space_map_add(freemap, offset, size);
1297
1298		mutex_exit(&msp->ms_lock);
1299	}
1300
1301	if (BP_IS_GANG(bp)) {
1302		zio_gbh_phys_t gbh;
1303		int g;
1304
1305		/* LINTED - compile time assert */
1306		ASSERT(sizeof (zio_gbh_phys_t) == SPA_GANGBLOCKSIZE);
1307
1308		BP_SET_CHECKSUM(&blk, ZIO_CHECKSUM_GANG_HEADER);
1309		BP_SET_PSIZE(&blk, SPA_GANGBLOCKSIZE);
1310		BP_SET_LSIZE(&blk, SPA_GANGBLOCKSIZE);
1311		BP_SET_COMPRESS(&blk, ZIO_COMPRESS_OFF);
1312		error = zio_wait(zio_read(NULL, spa, &blk, &gbh,
1313		    SPA_GANGBLOCKSIZE, NULL, NULL, ZIO_PRIORITY_SYNC_READ,
1314		    ZIO_FLAG_CANFAIL | ZIO_FLAG_CONFIG_HELD, zb));
1315		if (error)
1316			return (error);
1317		if (BP_SHOULD_BYTESWAP(&blk))
1318			byteswap_uint64_array(&gbh, SPA_GANGBLOCKSIZE);
1319		for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
1320			if (BP_IS_HOLE(&gbh.zg_blkptr[g]))
1321				break;
1322			error = zdb_space_map_claim(spa, &gbh.zg_blkptr[g], zb);
1323			if (error)
1324				return (error);
1325		}
1326	}
1327
1328	return (0);
1329}
1330
1331static void
1332zdb_leak(space_map_t *sm, uint64_t start, uint64_t size)
1333{
1334	metaslab_t *msp;
1335
1336	/* LINTED */
1337	msp = (metaslab_t *)((char *)sm - offsetof(metaslab_t, ms_allocmap[0]));
1338
1339	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
1340	    (u_longlong_t)msp->ms_group->mg_vd->vdev_id,
1341	    (u_longlong_t)start,
1342	    (u_longlong_t)size);
1343}
1344
1345static void
1346zdb_space_map_unload(spa_t *spa)
1347{
1348	vdev_t *rvd = spa->spa_root_vdev;
1349	vdev_t *vd;
1350	int c, m;
1351
1352	for (c = 0; c < rvd->vdev_children; c++) {
1353		vd = rvd->vdev_child[c];
1354		for (m = 0; m < vd->vdev_ms_count; m++) {
1355			metaslab_t *msp = vd->vdev_ms[m];
1356			mutex_enter(&msp->ms_lock);
1357			space_map_vacate(&msp->ms_allocmap[0], zdb_leak,
1358			    &msp->ms_allocmap[0]);
1359			space_map_unload(&msp->ms_allocmap[0]);
1360			space_map_vacate(&msp->ms_freemap[0], NULL, NULL);
1361			mutex_exit(&msp->ms_lock);
1362		}
1363	}
1364}
1365
1366static void
1367zdb_refresh_ubsync(spa_t *spa)
1368{
1369	uberblock_t ub = { 0 };
1370	vdev_t *rvd = spa->spa_root_vdev;
1371	zio_t *zio;
1372
1373	/*
1374	 * Reload the uberblock.
1375	 */
1376	zio = zio_root(spa, NULL, NULL,
1377	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1378	vdev_uberblock_load(zio, rvd, &ub);
1379	(void) zio_wait(zio);
1380
1381	if (ub.ub_txg != 0)
1382		spa->spa_ubsync = ub;
1383}
1384
1385/*
1386 * Verify that the sum of the sizes of all blocks in the pool adds up
1387 * to the SPA's sa_alloc total.
1388 */
1389typedef struct zdb_blkstats {
1390	uint64_t	zb_asize;
1391	uint64_t	zb_lsize;
1392	uint64_t	zb_psize;
1393	uint64_t	zb_count;
1394} zdb_blkstats_t;
1395
1396#define	DMU_OT_DEFERRED	DMU_OT_NONE
1397#define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
1398
1399#define	ZB_TOTAL	ZB_MAXLEVEL
1400
1401typedef struct zdb_cb {
1402	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][DMU_OT_TOTAL + 1];
1403	uint64_t	zcb_errors[256];
1404	traverse_blk_cache_t *zcb_cache;
1405	int		zcb_readfails;
1406	int		zcb_haderrors;
1407} zdb_cb_t;
1408
1409static void
1410zdb_count_block(spa_t *spa, zdb_cb_t *zcb, blkptr_t *bp, int type)
1411{
1412	int i, error;
1413
1414	for (i = 0; i < 4; i++) {
1415		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
1416		int t = (i & 1) ? type : DMU_OT_TOTAL;
1417		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
1418
1419		zb->zb_asize += BP_GET_ASIZE(bp);
1420		zb->zb_lsize += BP_GET_LSIZE(bp);
1421		zb->zb_psize += BP_GET_PSIZE(bp);
1422		zb->zb_count++;
1423	}
1424
1425	if (dump_opt['L'])
1426		return;
1427
1428	error = zdb_space_map_claim(spa, bp, &zcb->zcb_cache->bc_bookmark);
1429
1430	if (error == 0)
1431		return;
1432
1433	if (error == EAGAIN)
1434		(void) fatal("double-allocation, bp=%p", bp);
1435
1436	if (error == ESTALE)
1437		(void) fatal("reference to freed block, bp=%p", bp);
1438
1439	(void) fatal("fatal error %d in bp %p", error, bp);
1440}
1441
1442static int
1443zdb_blkptr_cb(traverse_blk_cache_t *bc, spa_t *spa, void *arg)
1444{
1445	zbookmark_t *zb = &bc->bc_bookmark;
1446	zdb_cb_t *zcb = arg;
1447	blkptr_t *bp = &bc->bc_blkptr;
1448	dmu_object_type_t type = BP_GET_TYPE(bp);
1449	char blkbuf[BP_SPRINTF_LEN];
1450	int error = 0;
1451
1452	if (bc->bc_errno) {
1453		if (zcb->zcb_readfails++ < 10 && dump_opt['L']) {
1454			zdb_refresh_ubsync(spa);
1455			error = EAGAIN;
1456		} else {
1457			zcb->zcb_haderrors = 1;
1458			zcb->zcb_errors[bc->bc_errno]++;
1459			error = ERESTART;
1460		}
1461
1462		if (dump_opt['b'] >= 3 || (dump_opt['b'] >= 2 && bc->bc_errno))
1463			sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1464		else
1465			blkbuf[0] = '\0';
1466
1467		(void) printf("zdb_blkptr_cb: Got error %d reading "
1468		    "<%llu, %llu, %lld, %llx> %s -- %s\n",
1469		    bc->bc_errno,
1470		    (u_longlong_t)zb->zb_objset,
1471		    (u_longlong_t)zb->zb_object,
1472		    (u_longlong_t)zb->zb_level,
1473		    (u_longlong_t)zb->zb_blkid,
1474		    blkbuf,
1475		    error == EAGAIN ? "retrying" : "skipping");
1476
1477		return (error);
1478	}
1479
1480	zcb->zcb_readfails = 0;
1481
1482	ASSERT(!BP_IS_HOLE(bp));
1483
1484	if (dump_opt['b'] >= 4) {
1485		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1486		(void) printf("objset %llu object %llu offset 0x%llx %s\n",
1487		    (u_longlong_t)zb->zb_objset,
1488		    (u_longlong_t)zb->zb_object,
1489		    (u_longlong_t)blkid2offset(bc->bc_dnode,
1490			zb->zb_level, zb->zb_blkid),
1491		    blkbuf);
1492	}
1493
1494	zdb_count_block(spa, zcb, bp, type);
1495
1496	return (0);
1497}
1498
1499static int
1500dump_block_stats(spa_t *spa)
1501{
1502	traverse_handle_t *th;
1503	zdb_cb_t zcb = { 0 };
1504	traverse_blk_cache_t dummy_cache = { 0 };
1505	zdb_blkstats_t *zb, *tzb;
1506	uint64_t alloc, space;
1507	int leaks = 0;
1508	int advance = zdb_advance;
1509	int flags;
1510	int e;
1511
1512	zcb.zcb_cache = &dummy_cache;
1513
1514	if (dump_opt['c'])
1515		advance |= ADVANCE_DATA;
1516
1517	advance |= ADVANCE_PRUNE | ADVANCE_ZIL;
1518
1519	(void) printf("\nTraversing all blocks to %sverify"
1520	    " nothing leaked ...\n",
1521	    dump_opt['c'] ? "verify checksums and " : "");
1522
1523	/*
1524	 * Load all space maps.  As we traverse the pool, if we find a block
1525	 * that's not in its space map, that indicates a double-allocation,
1526	 * reference to a freed block, or an unclaimed block.  Otherwise we
1527	 * remove the block from the space map.  If the space maps are not
1528	 * empty when we're done, that indicates leaked blocks.
1529	 */
1530	if (!dump_opt['L'])
1531		zdb_space_map_load(spa);
1532
1533	/*
1534	 * If there's a deferred-free bplist, process that first.
1535	 */
1536	if (spa->spa_sync_bplist_obj != 0) {
1537		bplist_t *bpl = &spa->spa_sync_bplist;
1538		blkptr_t blk;
1539		uint64_t itor = 0;
1540
1541		VERIFY(0 == bplist_open(bpl, spa->spa_meta_objset,
1542		    spa->spa_sync_bplist_obj));
1543
1544		while (bplist_iterate(bpl, &itor, &blk) == 0) {
1545			if (dump_opt['b'] >= 4) {
1546				char blkbuf[BP_SPRINTF_LEN];
1547				sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &blk);
1548				(void) printf("[%s] %s\n",
1549				    "deferred free", blkbuf);
1550			}
1551			zdb_count_block(spa, &zcb, &blk, DMU_OT_DEFERRED);
1552		}
1553
1554		bplist_close(bpl);
1555	}
1556
1557	/*
1558	 * Now traverse the pool.  If we're reading all data to verify
1559	 * checksums, do a scrubbing read so that we validate all copies.
1560	 */
1561	flags = ZIO_FLAG_CANFAIL;
1562	if (advance & ADVANCE_DATA)
1563		flags |= ZIO_FLAG_SCRUB;
1564	th = traverse_init(spa, zdb_blkptr_cb, &zcb, advance, flags);
1565	th->th_noread = zdb_noread;
1566
1567	traverse_add_pool(th, 0, spa_first_txg(spa) + TXG_CONCURRENT_STATES);
1568
1569	while (traverse_more(th) == EAGAIN)
1570		continue;
1571
1572	traverse_fini(th);
1573
1574	if (zcb.zcb_haderrors) {
1575		(void) printf("\nError counts:\n\n");
1576		(void) printf("\t%5s  %s\n", "errno", "count");
1577		for (e = 0; e < 256; e++) {
1578			if (zcb.zcb_errors[e] != 0) {
1579				(void) printf("\t%5d  %llu\n",
1580				    e, (u_longlong_t)zcb.zcb_errors[e]);
1581			}
1582		}
1583	}
1584
1585	/*
1586	 * Report any leaked segments.
1587	 */
1588	if (!dump_opt['L'])
1589		zdb_space_map_unload(spa);
1590
1591	if (dump_opt['L'])
1592		(void) printf("\n\n *** Live pool traversal; "
1593		    "block counts are only approximate ***\n\n");
1594
1595	alloc = spa_get_alloc(spa);
1596	space = spa_get_space(spa);
1597
1598	tzb = &zcb.zcb_type[ZB_TOTAL][DMU_OT_TOTAL];
1599
1600	if (tzb->zb_asize == alloc) {
1601		(void) printf("\n\tNo leaks (block sum matches space"
1602		    " maps exactly)\n");
1603	} else {
1604		(void) printf("block traversal size %llu != alloc %llu "
1605		    "(leaked %lld)\n",
1606		    (u_longlong_t)tzb->zb_asize,
1607		    (u_longlong_t)alloc,
1608		    (u_longlong_t)(alloc - tzb->zb_asize));
1609		leaks = 1;
1610	}
1611
1612	if (tzb->zb_count == 0)
1613		return (2);
1614
1615	(void) printf("\n");
1616	(void) printf("\tbp count:      %10llu\n",
1617	    (u_longlong_t)tzb->zb_count);
1618	(void) printf("\tbp logical:    %10llu\t avg: %6llu\n",
1619	    (u_longlong_t)tzb->zb_lsize,
1620	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
1621	(void) printf("\tbp physical:   %10llu\t avg:"
1622	    " %6llu\tcompression: %6.2f\n",
1623	    (u_longlong_t)tzb->zb_psize,
1624	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
1625	    (double)tzb->zb_lsize / tzb->zb_psize);
1626	(void) printf("\tbp allocated:  %10llu\t avg:"
1627	    " %6llu\tcompression: %6.2f\n",
1628	    (u_longlong_t)tzb->zb_asize,
1629	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
1630	    (double)tzb->zb_lsize / tzb->zb_asize);
1631	(void) printf("\tSPA allocated: %10llu\tused: %5.2f%%\n",
1632	    (u_longlong_t)alloc, 100.0 * alloc / space);
1633
1634	if (dump_opt['b'] >= 2) {
1635		int l, t, level;
1636		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
1637		    "\t  avg\t comp\t%%Total\tType\n");
1638
1639		for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
1640			char csize[6], lsize[6], psize[6], asize[6], avg[6];
1641			char *typename;
1642
1643			typename = t == DMU_OT_DEFERRED ? "deferred free" :
1644			    t == DMU_OT_TOTAL ? "Total" : dmu_ot[t].ot_name;
1645
1646			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
1647				(void) printf("%6s\t%5s\t%5s\t%5s"
1648				    "\t%5s\t%5s\t%6s\t%s\n",
1649				    "-",
1650				    "-",
1651				    "-",
1652				    "-",
1653				    "-",
1654				    "-",
1655				    "-",
1656				    typename);
1657				continue;
1658			}
1659
1660			for (l = ZB_TOTAL - 1; l >= -1; l--) {
1661				level = (l == -1 ? ZB_TOTAL : l);
1662				zb = &zcb.zcb_type[level][t];
1663
1664				if (zb->zb_asize == 0)
1665					continue;
1666
1667				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
1668					continue;
1669
1670				if (level == 0 && zb->zb_asize ==
1671				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
1672					continue;
1673
1674				nicenum(zb->zb_count, csize);
1675				nicenum(zb->zb_lsize, lsize);
1676				nicenum(zb->zb_psize, psize);
1677				nicenum(zb->zb_asize, asize);
1678				nicenum(zb->zb_asize / zb->zb_count, avg);
1679
1680				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
1681				    "\t%5.2f\t%6.2f\t",
1682				    csize, lsize, psize, asize, avg,
1683				    (double)zb->zb_lsize / zb->zb_psize,
1684				    100.0 * zb->zb_asize / tzb->zb_asize);
1685
1686				if (level == ZB_TOTAL)
1687					(void) printf("%s\n", typename);
1688				else
1689					(void) printf("    L%d %s\n",
1690					    level, typename);
1691			}
1692		}
1693	}
1694
1695	(void) printf("\n");
1696
1697	if (leaks)
1698		return (2);
1699
1700	if (zcb.zcb_haderrors)
1701		return (3);
1702
1703	return (0);
1704}
1705
1706static void
1707dump_zpool(spa_t *spa)
1708{
1709	dsl_pool_t *dp = spa_get_dsl(spa);
1710	int rc = 0;
1711
1712	if (dump_opt['u'])
1713		dump_uberblock(&spa->spa_uberblock);
1714
1715	if (dump_opt['d'] || dump_opt['i']) {
1716		dump_dir(dp->dp_meta_objset);
1717		if (dump_opt['d'] >= 3) {
1718			dump_bplist(dp->dp_meta_objset,
1719			    spa->spa_sync_bplist_obj, "Deferred frees");
1720			dump_dtl(spa->spa_root_vdev, 0);
1721			dump_metaslabs(spa);
1722		}
1723		(void) dmu_objset_find(spa->spa_name, dump_one_dir, NULL,
1724		    DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
1725	}
1726
1727	if (dump_opt['b'] || dump_opt['c'])
1728		rc = dump_block_stats(spa);
1729
1730	if (dump_opt['s'])
1731		show_pool_stats(spa);
1732
1733	if (rc != 0)
1734		exit(rc);
1735}
1736
1737#define	ZDB_FLAG_CHECKSUM	0x0001
1738#define	ZDB_FLAG_DECOMPRESS	0x0002
1739#define	ZDB_FLAG_BSWAP		0x0004
1740#define	ZDB_FLAG_GBH		0x0008
1741#define	ZDB_FLAG_INDIRECT	0x0010
1742#define	ZDB_FLAG_PHYS		0x0020
1743#define	ZDB_FLAG_RAW		0x0040
1744#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
1745
1746int flagbits[256];
1747
1748static void
1749zdb_print_blkptr(blkptr_t *bp, int flags)
1750{
1751	dva_t *dva = bp->blk_dva;
1752	int d;
1753
1754	if (flags & ZDB_FLAG_BSWAP)
1755		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
1756	/*
1757	 * Super-ick warning:  This code is also duplicated in
1758	 * cmd/mdb/common/modules/zfs/zfs.c .  Yeah, I hate code
1759	 * replication, too.
1760	 */
1761	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1762		(void) printf("\tDVA[%d]: vdev_id %lld / %llx\n", d,
1763		    (longlong_t)DVA_GET_VDEV(&dva[d]),
1764		    (longlong_t)DVA_GET_OFFSET(&dva[d]));
1765		(void) printf("\tDVA[%d]:       GANG: %-5s  GRID:  %04llx\t"
1766		    "ASIZE: %llx\n", d,
1767		    DVA_GET_GANG(&dva[d]) ? "TRUE" : "FALSE",
1768		    (longlong_t)DVA_GET_GRID(&dva[d]),
1769		    (longlong_t)DVA_GET_ASIZE(&dva[d]));
1770		(void) printf("\tDVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", d,
1771		    (u_longlong_t)DVA_GET_VDEV(&dva[d]),
1772		    (longlong_t)DVA_GET_OFFSET(&dva[d]),
1773		    (longlong_t)BP_GET_PSIZE(bp),
1774		    BP_SHOULD_BYTESWAP(bp) ? "e" : "",
1775		    !DVA_GET_GANG(&dva[d]) && BP_GET_LEVEL(bp) != 0 ?
1776		    "d" : "",
1777		    DVA_GET_GANG(&dva[d]) ? "g" : "",
1778		    BP_GET_COMPRESS(bp) != 0 ? "d" : "");
1779	}
1780	(void) printf("\tLSIZE:  %-16llx\t\tPSIZE: %llx\n",
1781	    (longlong_t)BP_GET_LSIZE(bp), (longlong_t)BP_GET_PSIZE(bp));
1782	(void) printf("\tENDIAN: %6s\t\t\t\t\tTYPE:  %s\n",
1783	    BP_GET_BYTEORDER(bp) ? "LITTLE" : "BIG",
1784	    dmu_ot[BP_GET_TYPE(bp)].ot_name);
1785	(void) printf("\tBIRTH:  %-16llx   LEVEL: %-2llu\tFILL:  %llx\n",
1786	    (u_longlong_t)bp->blk_birth, (u_longlong_t)BP_GET_LEVEL(bp),
1787	    (u_longlong_t)bp->blk_fill);
1788	(void) printf("\tCKFUNC: %-16s\t\tCOMP:  %s\n",
1789	    zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name,
1790	    zio_compress_table[BP_GET_COMPRESS(bp)].ci_name);
1791	(void) printf("\tCKSUM:  %llx:%llx:%llx:%llx\n",
1792	    (u_longlong_t)bp->blk_cksum.zc_word[0],
1793	    (u_longlong_t)bp->blk_cksum.zc_word[1],
1794	    (u_longlong_t)bp->blk_cksum.zc_word[2],
1795	    (u_longlong_t)bp->blk_cksum.zc_word[3]);
1796}
1797
1798static void
1799zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
1800{
1801	int i;
1802
1803	for (i = 0; i < nbps; i++)
1804		zdb_print_blkptr(&bp[i], flags);
1805}
1806
1807static void
1808zdb_dump_gbh(void *buf, int flags)
1809{
1810	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
1811}
1812
1813static void
1814zdb_dump_block_raw(void *buf, uint64_t size, int flags)
1815{
1816	if (flags & ZDB_FLAG_BSWAP)
1817		byteswap_uint64_array(buf, size);
1818	(void) write(2, buf, size);
1819}
1820
1821static void
1822zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
1823{
1824	uint64_t *d = (uint64_t *)buf;
1825	int nwords = size / sizeof (uint64_t);
1826	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
1827	int i, j;
1828	char *hdr, *c;
1829
1830
1831	if (do_bswap)
1832		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
1833	else
1834		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
1835
1836	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
1837
1838	for (i = 0; i < nwords; i += 2) {
1839		(void) printf("%06llx:  %016llx  %016llx  ",
1840		    (u_longlong_t)(i * sizeof (uint64_t)),
1841		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
1842		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
1843
1844		c = (char *)&d[i];
1845		for (j = 0; j < 2 * sizeof (uint64_t); j++)
1846			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
1847		(void) printf("\n");
1848	}
1849}
1850
1851/*
1852 * There are two acceptable formats:
1853 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
1854 *	child[.child]*    - For example: 0.1.1
1855 *
1856 * The second form can be used to specify arbitrary vdevs anywhere
1857 * in the heirarchy.  For example, in a pool with a mirror of
1858 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
1859 */
1860static vdev_t *
1861zdb_vdev_lookup(vdev_t *vdev, char *path)
1862{
1863	char *s, *p, *q;
1864	int i;
1865
1866	if (vdev == NULL)
1867		return (NULL);
1868
1869	/* First, assume the x.x.x.x format */
1870	i = (int)strtoul(path, &s, 10);
1871	if (s == path || (s && *s != '.' && *s != '\0'))
1872		goto name;
1873	if (i < 0 || i >= vdev->vdev_children)
1874		return (NULL);
1875
1876	vdev = vdev->vdev_child[i];
1877	if (*s == '\0')
1878		return (vdev);
1879	return (zdb_vdev_lookup(vdev, s+1));
1880
1881name:
1882	for (i = 0; i < vdev->vdev_children; i++) {
1883		vdev_t *vc = vdev->vdev_child[i];
1884
1885		if (vc->vdev_path == NULL) {
1886			vc = zdb_vdev_lookup(vc, path);
1887			if (vc == NULL)
1888				continue;
1889			else
1890				return (vc);
1891		}
1892
1893		p = strrchr(vc->vdev_path, '/');
1894		p = p ? p + 1 : vc->vdev_path;
1895		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
1896
1897		if (strcmp(vc->vdev_path, path) == 0)
1898			return (vc);
1899		if (strcmp(p, path) == 0)
1900			return (vc);
1901		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
1902			return (vc);
1903	}
1904
1905	return (NULL);
1906}
1907
1908/*
1909 * Read a block from a pool and print it out.  The syntax of the
1910 * block descriptor is:
1911 *
1912 *	pool:vdev_specifier:offset:size[:flags]
1913 *
1914 *	pool           - The name of the pool you wish to read from
1915 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
1916 *	offset         - offset, in hex, in bytes
1917 *	size           - Amount of data to read, in hex, in bytes
1918 *	flags          - A string of characters specifying options
1919 *		 b: Decode a blkptr at given offset within block
1920 *		*c: Calculate and display checksums
1921 *		*d: Decompress data before dumping
1922 *		 e: Byteswap data before dumping
1923 *		*g: Display data as a gang block header
1924 *		*i: Display as an indirect block
1925 *		 p: Do I/O to physical offset
1926 *		 r: Dump raw data to stdout
1927 *
1928 *              * = not yet implemented
1929 */
1930static void
1931zdb_read_block(char *thing, spa_t **spap)
1932{
1933	spa_t *spa = *spap;
1934	int flags = 0;
1935	uint64_t offset = 0, size = 0, blkptr_offset = 0;
1936	zio_t *zio;
1937	vdev_t *vd;
1938	void *buf;
1939	char *s, *p, *dup, *spa_name, *vdev, *flagstr;
1940	int i, error, zio_flags;
1941
1942	dup = strdup(thing);
1943	s = strtok(dup, ":");
1944	spa_name = s ? s : "";
1945	s = strtok(NULL, ":");
1946	vdev = s ? s : "";
1947	s = strtok(NULL, ":");
1948	offset = strtoull(s ? s : "", NULL, 16);
1949	s = strtok(NULL, ":");
1950	size = strtoull(s ? s : "", NULL, 16);
1951	s = strtok(NULL, ":");
1952	flagstr = s ? s : "";
1953
1954	s = NULL;
1955	if (size == 0)
1956		s = "size must not be zero";
1957	if (!IS_P2ALIGNED(size, DEV_BSIZE))
1958		s = "size must be a multiple of sector size";
1959	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
1960		s = "offset must be a multiple of sector size";
1961	if (s) {
1962		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
1963		free(dup);
1964		return;
1965	}
1966
1967	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
1968		for (i = 0; flagstr[i]; i++) {
1969			int bit = flagbits[(uchar_t)flagstr[i]];
1970
1971			if (bit == 0) {
1972				(void) printf("***Invalid flag: %c\n",
1973				    flagstr[i]);
1974				continue;
1975			}
1976			flags |= bit;
1977
1978			/* If it's not something with an argument, keep going */
1979			if ((bit & (ZDB_FLAG_CHECKSUM | ZDB_FLAG_DECOMPRESS |
1980			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
1981				continue;
1982
1983			p = &flagstr[i + 1];
1984			if (bit == ZDB_FLAG_PRINT_BLKPTR)
1985				blkptr_offset = strtoull(p, &p, 16);
1986			if (*p != ':' && *p != '\0') {
1987				(void) printf("***Invalid flag arg: '%s'\n", s);
1988				free(dup);
1989				return;
1990			}
1991		}
1992	}
1993
1994	if (spa == NULL || spa->spa_name == NULL ||
1995	    strcmp(spa->spa_name, spa_name)) {
1996		if (spa && spa->spa_name)
1997			spa_close(spa, (void *)zdb_read_block);
1998		error = spa_open(spa_name, spap, (void *)zdb_read_block);
1999		if (error)
2000			fatal("Failed to open pool '%s': errno = %d\n",
2001			    spa_name, error);
2002		spa = *spap;
2003	}
2004
2005	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
2006	if (vd == NULL) {
2007		(void) printf("***Invalid vdev: %s\n", vdev);
2008		free(dup);
2009		return;
2010	} else {
2011		if (vd->vdev_path)
2012			(void) printf("Found vdev: %s\n", vd->vdev_path);
2013		else
2014			(void) printf("Found vdev type: %s\n",
2015			    vd->vdev_ops->vdev_op_type);
2016	}
2017
2018	buf = umem_alloc(size, UMEM_NOFAIL);
2019
2020	zio_flags = ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
2021	    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_NOBOOKMARK;
2022
2023	if (flags & ZDB_FLAG_PHYS)
2024		zio_flags |= ZIO_FLAG_PHYSICAL;
2025
2026	zio = zio_root(spa, NULL, NULL, 0);
2027	/* XXX todo - cons up a BP so RAID-Z will be happy */
2028	zio_nowait(zio_vdev_child_io(zio, NULL, vd, offset, buf, size,
2029	    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ, zio_flags, NULL, NULL));
2030	error = zio_wait(zio);
2031
2032	if (error) {
2033		(void) printf("Read of %s failed, error: %d\n", thing, error);
2034		goto out;
2035	}
2036
2037	if (flags & ZDB_FLAG_PRINT_BLKPTR)
2038		zdb_print_blkptr((blkptr_t *)(void *)
2039		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
2040	else if (flags & ZDB_FLAG_RAW)
2041		zdb_dump_block_raw(buf, size, flags);
2042	else if (flags & ZDB_FLAG_INDIRECT)
2043		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
2044		    flags);
2045	else if (flags & ZDB_FLAG_GBH)
2046		zdb_dump_gbh(buf, flags);
2047	else
2048		zdb_dump_block(thing, buf, size, flags);
2049
2050out:
2051	umem_free(buf, size);
2052	free(dup);
2053}
2054
2055int
2056main(int argc, char **argv)
2057{
2058	int i, c;
2059	struct rlimit rl = { 1024, 1024 };
2060	spa_t *spa;
2061	objset_t *os = NULL;
2062	char *endstr;
2063	int dump_all = 1;
2064	int verbose = 0;
2065	int error;
2066	int flag, set;
2067	vdev_knob_t *vk;
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	for (vk = vdev_knob_next(NULL); vk != NULL; vk = vdev_knob_next(vk)) {
2150		if (strcmp(vk->vk_name, "cache_size") == 0)
2151			vk->vk_default = 0;
2152	}
2153
2154	for (c = 0; c < 256; c++) {
2155		if (dump_all && c != 'L' && c != 'l' && c != 'R')
2156			dump_opt[c] = 1;
2157		if (dump_opt[c])
2158			dump_opt[c] += verbose;
2159	}
2160
2161	argc -= optind;
2162	argv += optind;
2163
2164	if (argc < 1) {
2165		if (dump_opt['C']) {
2166			dump_config(NULL);
2167			return (0);
2168		}
2169		usage();
2170	}
2171
2172	if (dump_opt['l']) {
2173		dump_label(argv[0]);
2174		return (0);
2175	}
2176
2177	if (dump_opt['R']) {
2178		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
2179		flagbits['c'] = ZDB_FLAG_CHECKSUM;
2180		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
2181		flagbits['e'] = ZDB_FLAG_BSWAP;
2182		flagbits['g'] = ZDB_FLAG_GBH;
2183		flagbits['i'] = ZDB_FLAG_INDIRECT;
2184		flagbits['p'] = ZDB_FLAG_PHYS;
2185		flagbits['r'] = ZDB_FLAG_RAW;
2186
2187		spa = NULL;
2188		while (argv[0]) {
2189			zdb_read_block(argv[0], &spa);
2190			argv++;
2191			argc--;
2192		}
2193		if (spa)
2194			spa_close(spa, (void *)zdb_read_block);
2195		return (0);
2196	}
2197
2198	if (dump_opt['C'])
2199		dump_config(argv[0]);
2200
2201	if (strchr(argv[0], '/') != NULL) {
2202		error = dmu_objset_open(argv[0], DMU_OST_ANY,
2203		    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
2204	} else {
2205		error = spa_open(argv[0], &spa, FTAG);
2206	}
2207
2208	if (error)
2209		fatal("can't open %s: error %d", argv[0], error);
2210
2211	argv++;
2212	if (--argc > 0) {
2213		zopt_objects = argc;
2214		zopt_object = calloc(zopt_objects, sizeof (uint64_t));
2215		for (i = 0; i < zopt_objects; i++) {
2216			errno = 0;
2217			zopt_object[i] = strtoull(argv[i], NULL, 0);
2218			if (zopt_object[i] == 0 && errno != 0)
2219				fatal("bad object number %s: %s",
2220				    argv[i], strerror(errno));
2221		}
2222	}
2223
2224	if (os != NULL) {
2225		dump_dir(os);
2226		dmu_objset_close(os);
2227	} else {
2228		dump_zpool(spa);
2229		spa_close(spa, FTAG);
2230	}
2231
2232	kernel_fini();
2233
2234	return (0);
2235}
2236