zdb.c revision ecd6cf800b63704be73fb264c3f5b6e0dafc068d
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 2007 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			    "INVALID", "INVALID", "INVALID", "INVALID" };
378
379	if (smo->smo_object == 0)
380		return;
381
382	/*
383	 * Print out the freelist entries in both encoded and decoded form.
384	 */
385	alloc = 0;
386	for (offset = 0; offset < smo->smo_objsize; offset += sizeof (entry)) {
387		VERIFY(0 == dmu_read(os, smo->smo_object, offset,
388		    sizeof (entry), &entry));
389		if (SM_DEBUG_DECODE(entry)) {
390			(void) printf("\t\t[%4llu] %s: txg %llu, pass %llu\n",
391			    (u_longlong_t)(offset / sizeof (entry)),
392			    ddata[SM_DEBUG_ACTION_DECODE(entry)],
393			    (u_longlong_t)SM_DEBUG_TXG_DECODE(entry),
394			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(entry));
395		} else {
396			(void) printf("\t\t[%4llu]    %c  range:"
397			    " %08llx-%08llx  size: %06llx\n",
398			    (u_longlong_t)(offset / sizeof (entry)),
399			    SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
400			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
401			    mapshift) + mapstart),
402			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
403			    mapshift) + mapstart + (SM_RUN_DECODE(entry) <<
404			    mapshift)),
405			    (u_longlong_t)(SM_RUN_DECODE(entry) << mapshift));
406			if (SM_TYPE_DECODE(entry) == SM_ALLOC)
407				alloc += SM_RUN_DECODE(entry) << mapshift;
408			else
409				alloc -= SM_RUN_DECODE(entry) << mapshift;
410		}
411	}
412	if (alloc != smo->smo_alloc) {
413		(void) printf("space_map_object alloc (%llu) INCONSISTENT "
414		    "with space map summary (%llu)\n",
415		    (u_longlong_t)smo->smo_alloc, (u_longlong_t)alloc);
416	}
417}
418
419static void
420dump_metaslab(metaslab_t *msp)
421{
422	char freebuf[5];
423	space_map_obj_t *smo = &msp->ms_smo;
424	vdev_t *vd = msp->ms_group->mg_vd;
425	spa_t *spa = vd->vdev_spa;
426
427	nicenum(msp->ms_map.sm_size - smo->smo_alloc, freebuf);
428
429	if (dump_opt['d'] <= 5) {
430		(void) printf("\t%10llx   %10llu   %5s\n",
431		    (u_longlong_t)msp->ms_map.sm_start,
432		    (u_longlong_t)smo->smo_object,
433		    freebuf);
434		return;
435	}
436
437	(void) printf(
438	    "\tvdev %llu   offset %08llx   spacemap %4llu   free %5s\n",
439	    (u_longlong_t)vd->vdev_id, (u_longlong_t)msp->ms_map.sm_start,
440	    (u_longlong_t)smo->smo_object, freebuf);
441
442	ASSERT(msp->ms_map.sm_size == (1ULL << vd->vdev_ms_shift));
443
444	dump_spacemap(spa->spa_meta_objset, smo, &msp->ms_map);
445}
446
447static void
448dump_metaslabs(spa_t *spa)
449{
450	vdev_t *rvd = spa->spa_root_vdev;
451	vdev_t *vd;
452	int c, m;
453
454	(void) printf("\nMetaslabs:\n");
455
456	for (c = 0; c < rvd->vdev_children; c++) {
457		vd = rvd->vdev_child[c];
458
459		spa_config_enter(spa, RW_READER, FTAG);
460		(void) printf("\n    vdev %llu = %s\n\n",
461		    (u_longlong_t)vd->vdev_id, vdev_description(vd));
462		spa_config_exit(spa, FTAG);
463
464		if (dump_opt['d'] <= 5) {
465			(void) printf("\t%10s   %10s   %5s\n",
466			    "offset", "spacemap", "free");
467			(void) printf("\t%10s   %10s   %5s\n",
468			    "------", "--------", "----");
469		}
470		for (m = 0; m < vd->vdev_ms_count; m++)
471			dump_metaslab(vd->vdev_ms[m]);
472		(void) printf("\n");
473	}
474}
475
476static void
477dump_dtl(vdev_t *vd, int indent)
478{
479	avl_tree_t *t = &vd->vdev_dtl_map.sm_root;
480	spa_t *spa = vd->vdev_spa;
481	space_seg_t *ss;
482	vdev_t *pvd;
483	int c;
484
485	if (indent == 0)
486		(void) printf("\nDirty time logs:\n\n");
487
488	spa_config_enter(spa, RW_READER, FTAG);
489	(void) printf("\t%*s%s\n", indent, "", vdev_description(vd));
490	spa_config_exit(spa, FTAG);
491
492	for (ss = avl_first(t); ss; ss = AVL_NEXT(t, ss)) {
493		/*
494		 * Everything in this DTL must appear in all parent DTL unions.
495		 */
496		for (pvd = vd; pvd; pvd = pvd->vdev_parent)
497			ASSERT(vdev_dtl_contains(&pvd->vdev_dtl_map,
498			    ss->ss_start, ss->ss_end - ss->ss_start));
499		(void) printf("\t%*soutage [%llu,%llu] length %llu\n",
500		    indent, "",
501		    (u_longlong_t)ss->ss_start,
502		    (u_longlong_t)ss->ss_end - 1,
503		    (u_longlong_t)(ss->ss_end - ss->ss_start));
504	}
505
506	(void) printf("\n");
507
508	if (dump_opt['d'] > 5 && vd->vdev_children == 0) {
509		dump_spacemap(vd->vdev_spa->spa_meta_objset, &vd->vdev_dtl,
510		    &vd->vdev_dtl_map);
511		(void) printf("\n");
512	}
513
514	for (c = 0; c < vd->vdev_children; c++)
515		dump_dtl(vd->vdev_child[c], indent + 4);
516}
517
518/*ARGSUSED*/
519static void
520dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
521{
522}
523
524static uint64_t
525blkid2offset(dnode_phys_t *dnp, int level, uint64_t blkid)
526{
527	if (level < 0)
528		return (blkid);
529
530	return ((blkid << (level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
531	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
532}
533
534static void
535sprintf_blkptr_compact(char *blkbuf, blkptr_t *bp, int alldvas)
536{
537	dva_t *dva = bp->blk_dva;
538	int ndvas = alldvas ? BP_GET_NDVAS(bp) : 1;
539	int i;
540
541	blkbuf[0] = '\0';
542
543	for (i = 0; i < ndvas; i++)
544		(void) sprintf(blkbuf + strlen(blkbuf), "%llu:%llx:%llx ",
545		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
546		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
547		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
548
549	(void) sprintf(blkbuf + strlen(blkbuf), "%llxL/%llxP F=%llu B=%llu",
550	    (u_longlong_t)BP_GET_LSIZE(bp),
551	    (u_longlong_t)BP_GET_PSIZE(bp),
552	    (u_longlong_t)bp->blk_fill,
553	    (u_longlong_t)bp->blk_birth);
554}
555
556/* ARGSUSED */
557static int
558zdb_indirect_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a)
559{
560	zbookmark_t *zb = &bc->bc_bookmark;
561	blkptr_t *bp = &bc->bc_blkptr;
562	void *data = bc->bc_data;
563	dnode_phys_t *dnp = bc->bc_dnode;
564	char blkbuf[BP_SPRINTF_LEN + 80];
565	int l;
566
567	if (bc->bc_errno) {
568		(void) sprintf(blkbuf,
569		    "Error %d reading <%llu, %llu, %lld, %llu>: ",
570		    bc->bc_errno,
571		    (u_longlong_t)zb->zb_objset,
572		    (u_longlong_t)zb->zb_object,
573		    (u_longlong_t)zb->zb_level,
574		    (u_longlong_t)zb->zb_blkid);
575		goto out;
576	}
577
578	if (zb->zb_level == -1) {
579		ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
580		ASSERT3U(BP_GET_LEVEL(bp), ==, 0);
581	} else {
582		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
583		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
584	}
585
586	if (zb->zb_level > 0) {
587		uint64_t fill = 0;
588		blkptr_t *bpx, *bpend;
589
590		for (bpx = data, bpend = bpx + BP_GET_LSIZE(bp) / sizeof (*bpx);
591		    bpx < bpend; bpx++) {
592			if (bpx->blk_birth != 0) {
593				fill += bpx->blk_fill;
594			} else {
595				ASSERT(bpx->blk_fill == 0);
596			}
597		}
598		ASSERT3U(fill, ==, bp->blk_fill);
599	}
600
601	if (zb->zb_level == 0 && dnp->dn_type == DMU_OT_DNODE) {
602		uint64_t fill = 0;
603		dnode_phys_t *dnx, *dnend;
604
605		for (dnx = data, dnend = dnx + (BP_GET_LSIZE(bp)>>DNODE_SHIFT);
606		    dnx < dnend; dnx++) {
607			if (dnx->dn_type != DMU_OT_NONE)
608				fill++;
609		}
610		ASSERT3U(fill, ==, bp->blk_fill);
611	}
612
613	(void) sprintf(blkbuf, "%16llx ",
614	    (u_longlong_t)blkid2offset(dnp, zb->zb_level, zb->zb_blkid));
615
616	ASSERT(zb->zb_level >= 0);
617
618	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
619		if (l == zb->zb_level) {
620			(void) sprintf(blkbuf + strlen(blkbuf), "L%llx",
621			    (u_longlong_t)zb->zb_level);
622		} else {
623			(void) sprintf(blkbuf + strlen(blkbuf), " ");
624		}
625	}
626
627out:
628	if (bp->blk_birth == 0) {
629		(void) sprintf(blkbuf + strlen(blkbuf), "<hole>");
630		(void) printf("%s\n", blkbuf);
631	} else {
632		sprintf_blkptr_compact(blkbuf + strlen(blkbuf), bp,
633		    dump_opt['d'] > 5 ? 1 : 0);
634		(void) printf("%s\n", blkbuf);
635	}
636
637	return (bc->bc_errno ? ERESTART : 0);
638}
639
640/*ARGSUSED*/
641static void
642dump_indirect(objset_t *os, uint64_t object, void *data, size_t size)
643{
644	traverse_handle_t *th;
645	uint64_t objset = dmu_objset_id(os);
646	int advance = zdb_advance;
647
648	(void) printf("Indirect blocks:\n");
649
650	if (object == 0)
651		advance |= ADVANCE_DATA;
652
653	th = traverse_init(dmu_objset_spa(os), zdb_indirect_cb, NULL, advance,
654	    ZIO_FLAG_CANFAIL);
655	th->th_noread = zdb_noread;
656
657	traverse_add_dnode(th, 0, -1ULL, objset, object);
658
659	while (traverse_more(th) == EAGAIN)
660		continue;
661
662	(void) printf("\n");
663
664	traverse_fini(th);
665}
666
667/*ARGSUSED*/
668static void
669dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
670{
671	dsl_dir_phys_t *dd = data;
672	time_t crtime;
673	char used[6], compressed[6], uncompressed[6], quota[6], resv[6];
674
675	if (dd == NULL)
676		return;
677
678	ASSERT(size == sizeof (*dd));
679
680	crtime = dd->dd_creation_time;
681	nicenum(dd->dd_used_bytes, used);
682	nicenum(dd->dd_compressed_bytes, compressed);
683	nicenum(dd->dd_uncompressed_bytes, uncompressed);
684	nicenum(dd->dd_quota, quota);
685	nicenum(dd->dd_reserved, resv);
686
687	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
688	(void) printf("\t\thead_dataset_obj = %llu\n",
689	    (u_longlong_t)dd->dd_head_dataset_obj);
690	(void) printf("\t\tparent_dir_obj = %llu\n",
691	    (u_longlong_t)dd->dd_parent_obj);
692	(void) printf("\t\tclone_parent_obj = %llu\n",
693	    (u_longlong_t)dd->dd_clone_parent_obj);
694	(void) printf("\t\tchild_dir_zapobj = %llu\n",
695	    (u_longlong_t)dd->dd_child_dir_zapobj);
696	(void) printf("\t\tused_bytes = %s\n", used);
697	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
698	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
699	(void) printf("\t\tquota = %s\n", quota);
700	(void) printf("\t\treserved = %s\n", resv);
701	(void) printf("\t\tprops_zapobj = %llu\n",
702	    (u_longlong_t)dd->dd_props_zapobj);
703	(void) printf("\t\tdeleg_zapobj = %llu\n",
704	    (u_longlong_t)dd->dd_deleg_zapobj);
705}
706
707/*ARGSUSED*/
708static void
709dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
710{
711	dsl_dataset_phys_t *ds = data;
712	time_t crtime;
713	char used[6], compressed[6], uncompressed[6], unique[6];
714	char blkbuf[BP_SPRINTF_LEN];
715
716	if (ds == NULL)
717		return;
718
719	ASSERT(size == sizeof (*ds));
720	crtime = ds->ds_creation_time;
721	nicenum(ds->ds_used_bytes, used);
722	nicenum(ds->ds_compressed_bytes, compressed);
723	nicenum(ds->ds_uncompressed_bytes, uncompressed);
724	nicenum(ds->ds_unique_bytes, unique);
725	sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ds->ds_bp);
726
727	(void) printf("\t\tdataset_obj = %llu\n",
728	    (u_longlong_t)ds->ds_dir_obj);
729	(void) printf("\t\tprev_snap_obj = %llu\n",
730	    (u_longlong_t)ds->ds_prev_snap_obj);
731	(void) printf("\t\tprev_snap_txg = %llu\n",
732	    (u_longlong_t)ds->ds_prev_snap_txg);
733	(void) printf("\t\tnext_snap_obj = %llu\n",
734	    (u_longlong_t)ds->ds_next_snap_obj);
735	(void) printf("\t\tsnapnames_zapobj = %llu\n",
736	    (u_longlong_t)ds->ds_snapnames_zapobj);
737	(void) printf("\t\tnum_children = %llu\n",
738	    (u_longlong_t)ds->ds_num_children);
739	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
740	(void) printf("\t\tcreation_txg = %llu\n",
741	    (u_longlong_t)ds->ds_creation_txg);
742	(void) printf("\t\tdeadlist_obj = %llu\n",
743	    (u_longlong_t)ds->ds_deadlist_obj);
744	(void) printf("\t\tused_bytes = %s\n", used);
745	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
746	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
747	(void) printf("\t\tunique = %s\n", unique);
748	(void) printf("\t\tfsid_guid = %llu\n",
749	    (u_longlong_t)ds->ds_fsid_guid);
750	(void) printf("\t\tguid = %llu\n",
751	    (u_longlong_t)ds->ds_guid);
752	(void) printf("\t\tflags = %llx\n",
753	    (u_longlong_t)ds->ds_flags);
754	(void) printf("\t\tbp = %s\n", blkbuf);
755}
756
757static void
758dump_bplist(objset_t *mos, uint64_t object, char *name)
759{
760	bplist_t bpl = { 0 };
761	blkptr_t blk, *bp = &blk;
762	uint64_t itor = 0;
763	char bytes[6];
764	char comp[6];
765	char uncomp[6];
766
767	if (dump_opt['d'] < 3)
768		return;
769
770	VERIFY(0 == bplist_open(&bpl, mos, object));
771	if (bplist_empty(&bpl)) {
772		bplist_close(&bpl);
773		return;
774	}
775
776	nicenum(bpl.bpl_phys->bpl_bytes, bytes);
777	if (bpl.bpl_dbuf->db_size == sizeof (bplist_phys_t)) {
778		nicenum(bpl.bpl_phys->bpl_comp, comp);
779		nicenum(bpl.bpl_phys->bpl_uncomp, uncomp);
780		(void) printf("\n    %s: %llu entries, %s (%s/%s comp)\n",
781		    name, (u_longlong_t)bpl.bpl_phys->bpl_entries,
782		    bytes, comp, uncomp);
783	} else {
784		(void) printf("\n    %s: %llu entries, %s\n",
785		    name, (u_longlong_t)bpl.bpl_phys->bpl_entries, bytes);
786	}
787
788	if (dump_opt['d'] < 5) {
789		bplist_close(&bpl);
790		return;
791	}
792
793	(void) printf("\n");
794
795	while (bplist_iterate(&bpl, &itor, bp) == 0) {
796		char blkbuf[BP_SPRINTF_LEN];
797
798		ASSERT(bp->blk_birth != 0);
799		sprintf_blkptr_compact(blkbuf, bp, dump_opt['d'] > 5 ? 1 : 0);
800		(void) printf("\tItem %3llu: %s\n",
801		    (u_longlong_t)itor - 1, blkbuf);
802	}
803
804	bplist_close(&bpl);
805}
806
807/*ARGSUSED*/
808static void
809dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
810{
811	znode_phys_t *zp = data;
812	time_t z_crtime, z_atime, z_mtime, z_ctime;
813	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
814	int error;
815
816	ASSERT(size >= sizeof (znode_phys_t));
817
818	error = zfs_obj_to_path(os, object, path, sizeof (path));
819	if (error != 0) {
820		(void) snprintf(path, sizeof (path), "\?\?\?<object#%llu>",
821		    (u_longlong_t)object);
822	}
823
824	if (dump_opt['d'] < 3) {
825		(void) printf("\t%s\n", path);
826		return;
827	}
828
829	z_crtime = (time_t)zp->zp_crtime[0];
830	z_atime = (time_t)zp->zp_atime[0];
831	z_mtime = (time_t)zp->zp_mtime[0];
832	z_ctime = (time_t)zp->zp_ctime[0];
833
834	(void) printf("\tpath	%s\n", path);
835	(void) printf("\tatime	%s", ctime(&z_atime));
836	(void) printf("\tmtime	%s", ctime(&z_mtime));
837	(void) printf("\tctime	%s", ctime(&z_ctime));
838	(void) printf("\tcrtime	%s", ctime(&z_crtime));
839	(void) printf("\tgen	%llu\n", (u_longlong_t)zp->zp_gen);
840	(void) printf("\tmode	%llo\n", (u_longlong_t)zp->zp_mode);
841	(void) printf("\tsize	%llu\n", (u_longlong_t)zp->zp_size);
842	(void) printf("\tparent	%llu\n", (u_longlong_t)zp->zp_parent);
843	(void) printf("\tlinks	%llu\n", (u_longlong_t)zp->zp_links);
844	(void) printf("\txattr	%llu\n", (u_longlong_t)zp->zp_xattr);
845	(void) printf("\trdev	0x%016llx\n", (u_longlong_t)zp->zp_rdev);
846}
847
848/*ARGSUSED*/
849static void
850dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
851{
852}
853
854/*ARGSUSED*/
855static void
856dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
857{
858}
859
860static object_viewer_t *object_viewer[DMU_OT_NUMTYPES] = {
861	dump_none,		/* unallocated			*/
862	dump_zap,		/* object directory		*/
863	dump_uint64,		/* object array			*/
864	dump_none,		/* packed nvlist		*/
865	dump_packed_nvlist,	/* packed nvlist size		*/
866	dump_none,		/* bplist			*/
867	dump_none,		/* bplist header		*/
868	dump_none,		/* SPA space map header		*/
869	dump_none,		/* SPA space map		*/
870	dump_none,		/* ZIL intent log		*/
871	dump_dnode,		/* DMU dnode			*/
872	dump_dmu_objset,	/* DMU objset			*/
873	dump_dsl_dir,		/* DSL directory		*/
874	dump_zap,		/* DSL directory child map	*/
875	dump_zap,		/* DSL dataset snap map		*/
876	dump_zap,		/* DSL props			*/
877	dump_dsl_dataset,	/* DSL dataset			*/
878	dump_znode,		/* ZFS znode			*/
879	dump_acl,		/* ZFS ACL			*/
880	dump_uint8,		/* ZFS plain file		*/
881	dump_zap,		/* ZFS directory		*/
882	dump_zap,		/* ZFS master node		*/
883	dump_zap,		/* ZFS delete queue		*/
884	dump_uint8,		/* zvol object			*/
885	dump_zap,		/* zvol prop			*/
886	dump_uint8,		/* other uint8[]		*/
887	dump_uint64,		/* other uint64[]		*/
888	dump_zap,		/* other ZAP			*/
889	dump_zap,		/* persistent error log		*/
890	dump_uint8,		/* SPA history			*/
891	dump_uint64,		/* SPA history offsets		*/
892	dump_zap,		/* Pool properties		*/
893	dump_zap,		/* DSL permissions		*/
894};
895
896static void
897dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
898{
899	dmu_buf_t *db = NULL;
900	dmu_object_info_t doi;
901	dnode_t *dn;
902	void *bonus = NULL;
903	size_t bsize = 0;
904	char iblk[6], dblk[6], lsize[6], asize[6], bonus_size[6], segsize[6];
905	char aux[50];
906	int error;
907
908	if (*print_header) {
909		(void) printf("\n    Object  lvl   iblk   dblk  lsize"
910		    "  asize  type\n");
911		*print_header = 0;
912	}
913
914	if (object == 0) {
915		dn = os->os->os_meta_dnode;
916	} else {
917		error = dmu_bonus_hold(os, object, FTAG, &db);
918		if (error)
919			fatal("dmu_bonus_hold(%llu) failed, errno %u",
920			    object, error);
921		bonus = db->db_data;
922		bsize = db->db_size;
923		dn = ((dmu_buf_impl_t *)db)->db_dnode;
924	}
925	dmu_object_info_from_dnode(dn, &doi);
926
927	nicenum(doi.doi_metadata_block_size, iblk);
928	nicenum(doi.doi_data_block_size, dblk);
929	nicenum(doi.doi_data_block_size * (doi.doi_max_block_offset + 1),
930	    lsize);
931	nicenum(doi.doi_physical_blks << 9, asize);
932	nicenum(doi.doi_bonus_size, bonus_size);
933
934	aux[0] = '\0';
935
936	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6)
937		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
938		    zio_checksum_table[doi.doi_checksum].ci_name);
939
940	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6)
941		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
942		    zio_compress_table[doi.doi_compress].ci_name);
943
944	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %s%s\n",
945	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk, lsize,
946	    asize, dmu_ot[doi.doi_type].ot_name, aux);
947
948	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
949		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %s\n",
950		    "", "", "", "", bonus_size, "bonus",
951		    dmu_ot[doi.doi_bonus_type].ot_name);
952	}
953
954	if (verbosity >= 4) {
955		object_viewer[doi.doi_bonus_type](os, object, bonus, bsize);
956		object_viewer[doi.doi_type](os, object, NULL, 0);
957		*print_header = 1;
958	}
959
960	if (verbosity >= 5)
961		dump_indirect(os, object, NULL, 0);
962
963	if (verbosity >= 5) {
964		/*
965		 * Report the list of segments that comprise the object.
966		 */
967		uint64_t start = 0;
968		uint64_t end;
969		uint64_t blkfill = 1;
970		int minlvl = 1;
971
972		if (dn->dn_type == DMU_OT_DNODE) {
973			minlvl = 0;
974			blkfill = DNODES_PER_BLOCK;
975		}
976
977		for (;;) {
978			error = dnode_next_offset(dn, B_FALSE, &start, minlvl,
979			    blkfill, 0);
980			if (error)
981				break;
982			end = start;
983			error = dnode_next_offset(dn, B_TRUE, &end, minlvl,
984			    blkfill, 0);
985			nicenum(end - start, segsize);
986			(void) printf("\t\tsegment [%016llx, %016llx)"
987			    " size %5s\n", (u_longlong_t)start,
988			    (u_longlong_t)end, segsize);
989			if (error)
990				break;
991			start = end;
992		}
993	}
994
995	if (db != NULL)
996		dmu_buf_rele(db, FTAG);
997}
998
999static char *objset_types[DMU_OST_NUMTYPES] = {
1000	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1001
1002/*ARGSUSED*/
1003static void
1004dump_dir(objset_t *os)
1005{
1006	dmu_objset_stats_t dds;
1007	uint64_t object, object_count;
1008	uint64_t refdbytes, usedobjs, scratch;
1009	char numbuf[8];
1010	char blkbuf[BP_SPRINTF_LEN];
1011	char osname[MAXNAMELEN];
1012	char *type = "UNKNOWN";
1013	int verbosity = dump_opt['d'];
1014	int print_header = 1;
1015	int i, error;
1016
1017	dmu_objset_fast_stat(os, &dds);
1018
1019	if (dds.dds_type < DMU_OST_NUMTYPES)
1020		type = objset_types[dds.dds_type];
1021
1022	if (dds.dds_type == DMU_OST_META) {
1023		dds.dds_creation_txg = TXG_INITIAL;
1024		usedobjs = os->os->os_rootbp->blk_fill;
1025		refdbytes =
1026		    os->os->os_spa->spa_dsl_pool->dp_mos_dir->dd_used_bytes;
1027	} else {
1028		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
1029	}
1030
1031	ASSERT3U(usedobjs, ==, os->os->os_rootbp->blk_fill);
1032
1033	nicenum(refdbytes, numbuf);
1034
1035	if (verbosity >= 4) {
1036		(void) strcpy(blkbuf, ", rootbp ");
1037		sprintf_blkptr(blkbuf + strlen(blkbuf),
1038		    BP_SPRINTF_LEN - strlen(blkbuf), os->os->os_rootbp);
1039	} else {
1040		blkbuf[0] = '\0';
1041	}
1042
1043	dmu_objset_name(os, osname);
1044
1045	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
1046	    "%s, %llu objects%s\n",
1047	    osname, type, (u_longlong_t)dmu_objset_id(os),
1048	    (u_longlong_t)dds.dds_creation_txg,
1049	    numbuf, (u_longlong_t)usedobjs, blkbuf);
1050
1051	dump_intent_log(dmu_objset_zil(os));
1052
1053	if (dmu_objset_ds(os) != NULL)
1054		dump_bplist(dmu_objset_pool(os)->dp_meta_objset,
1055		    dmu_objset_ds(os)->ds_phys->ds_deadlist_obj, "Deadlist");
1056
1057	if (verbosity < 2)
1058		return;
1059
1060	if (zopt_objects != 0) {
1061		for (i = 0; i < zopt_objects; i++)
1062			dump_object(os, zopt_object[i], verbosity,
1063			    &print_header);
1064		(void) printf("\n");
1065		return;
1066	}
1067
1068	dump_object(os, 0, verbosity, &print_header);
1069	object_count = 1;
1070
1071	object = 0;
1072	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
1073		dump_object(os, object, verbosity, &print_header);
1074		object_count++;
1075	}
1076
1077	ASSERT3U(object_count, ==, usedobjs);
1078
1079	(void) printf("\n");
1080
1081	if (error != ESRCH)
1082		fatal("dmu_object_next() = %d", error);
1083}
1084
1085static void
1086dump_uberblock(uberblock_t *ub)
1087{
1088	time_t timestamp = ub->ub_timestamp;
1089
1090	(void) printf("Uberblock\n\n");
1091	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1092	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1093	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1094	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1095	(void) printf("\ttimestamp = %llu UTC = %s",
1096	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1097	if (dump_opt['u'] >= 3) {
1098		char blkbuf[BP_SPRINTF_LEN];
1099		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ub->ub_rootbp);
1100		(void) printf("\trootbp = %s\n", blkbuf);
1101	}
1102	(void) printf("\n");
1103}
1104
1105static void
1106dump_config(const char *pool)
1107{
1108	spa_t *spa = NULL;
1109
1110	mutex_enter(&spa_namespace_lock);
1111	while ((spa = spa_next(spa)) != NULL) {
1112		if (pool == NULL)
1113			(void) printf("%s\n", spa_name(spa));
1114		if (pool == NULL || strcmp(pool, spa_name(spa)) == 0)
1115			dump_nvlist(spa->spa_config, 4);
1116	}
1117	mutex_exit(&spa_namespace_lock);
1118}
1119
1120static void
1121dump_label(const char *dev)
1122{
1123	int fd;
1124	vdev_label_t label;
1125	char *buf = label.vl_vdev_phys.vp_nvlist;
1126	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
1127	struct stat64 statbuf;
1128	uint64_t psize;
1129	int l;
1130
1131	if ((fd = open64(dev, O_RDONLY)) < 0) {
1132		(void) printf("cannot open '%s': %s\n", dev, strerror(errno));
1133		exit(1);
1134	}
1135
1136	if (fstat64(fd, &statbuf) != 0) {
1137		(void) printf("failed to stat '%s': %s\n", dev,
1138		    strerror(errno));
1139		exit(1);
1140	}
1141
1142	psize = statbuf.st_size;
1143	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
1144
1145	for (l = 0; l < VDEV_LABELS; l++) {
1146
1147		nvlist_t *config = NULL;
1148
1149		(void) printf("--------------------------------------------\n");
1150		(void) printf("LABEL %d\n", l);
1151		(void) printf("--------------------------------------------\n");
1152
1153		if (pread64(fd, &label, sizeof (label),
1154		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
1155			(void) printf("failed to read label %d\n", l);
1156			continue;
1157		}
1158
1159		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
1160			(void) printf("failed to unpack label %d\n", l);
1161			continue;
1162		}
1163		dump_nvlist(config, 4);
1164		nvlist_free(config);
1165	}
1166}
1167
1168/*ARGSUSED*/
1169static int
1170dump_one_dir(char *dsname, void *arg)
1171{
1172	int error;
1173	objset_t *os;
1174
1175	error = dmu_objset_open(dsname, DMU_OST_ANY,
1176	    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
1177	if (error) {
1178		(void) printf("Could not open %s\n", dsname);
1179		return (0);
1180	}
1181	dump_dir(os);
1182	dmu_objset_close(os);
1183	return (0);
1184}
1185
1186static void
1187zdb_space_map_load(spa_t *spa)
1188{
1189	vdev_t *rvd = spa->spa_root_vdev;
1190	vdev_t *vd;
1191	int c, m, error;
1192
1193	for (c = 0; c < rvd->vdev_children; c++) {
1194		vd = rvd->vdev_child[c];
1195		for (m = 0; m < vd->vdev_ms_count; m++) {
1196			metaslab_t *msp = vd->vdev_ms[m];
1197			mutex_enter(&msp->ms_lock);
1198			error = space_map_load(&msp->ms_allocmap[0], NULL,
1199			    SM_ALLOC, &msp->ms_smo, spa->spa_meta_objset);
1200			mutex_exit(&msp->ms_lock);
1201			if (error)
1202				fatal("%s bad space map #%d, error %d",
1203				    spa->spa_name, c, error);
1204		}
1205	}
1206}
1207
1208static int
1209zdb_space_map_claim(spa_t *spa, blkptr_t *bp, zbookmark_t *zb)
1210{
1211	dva_t *dva = bp->blk_dva;
1212	vdev_t *vd;
1213	metaslab_t *msp;
1214	space_map_t *allocmap, *freemap;
1215	int error;
1216	int d;
1217	blkptr_t blk = *bp;
1218
1219	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1220		uint64_t vdev = DVA_GET_VDEV(&dva[d]);
1221		uint64_t offset = DVA_GET_OFFSET(&dva[d]);
1222		uint64_t size = DVA_GET_ASIZE(&dva[d]);
1223
1224		if ((vd = vdev_lookup_top(spa, vdev)) == NULL)
1225			return (ENXIO);
1226
1227		if ((offset >> vd->vdev_ms_shift) >= vd->vdev_ms_count)
1228			return (ENXIO);
1229
1230		msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
1231		allocmap = &msp->ms_allocmap[0];
1232		freemap = &msp->ms_freemap[0];
1233
1234		/* Prepare our copy of the bp in case we need to read GBHs */
1235		if (DVA_GET_GANG(&dva[d])) {
1236			size = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
1237			DVA_SET_ASIZE(&blk.blk_dva[d], size);
1238			DVA_SET_GANG(&blk.blk_dva[d], 0);
1239		}
1240
1241		mutex_enter(&msp->ms_lock);
1242		if (space_map_contains(freemap, offset, size)) {
1243			mutex_exit(&msp->ms_lock);
1244			return (EAGAIN);	/* allocated more than once */
1245		}
1246
1247		if (!space_map_contains(allocmap, offset, size)) {
1248			mutex_exit(&msp->ms_lock);
1249			return (ESTALE);	/* not allocated at all */
1250		}
1251
1252		space_map_remove(allocmap, offset, size);
1253		space_map_add(freemap, offset, size);
1254
1255		mutex_exit(&msp->ms_lock);
1256	}
1257
1258	if (BP_IS_GANG(bp)) {
1259		zio_gbh_phys_t gbh;
1260		int g;
1261
1262		/* LINTED - compile time assert */
1263		ASSERT(sizeof (zio_gbh_phys_t) == SPA_GANGBLOCKSIZE);
1264
1265		BP_SET_CHECKSUM(&blk, ZIO_CHECKSUM_GANG_HEADER);
1266		BP_SET_PSIZE(&blk, SPA_GANGBLOCKSIZE);
1267		BP_SET_LSIZE(&blk, SPA_GANGBLOCKSIZE);
1268		BP_SET_COMPRESS(&blk, ZIO_COMPRESS_OFF);
1269		error = zio_wait(zio_read(NULL, spa, &blk, &gbh,
1270		    SPA_GANGBLOCKSIZE, NULL, NULL, ZIO_PRIORITY_SYNC_READ,
1271		    ZIO_FLAG_CANFAIL | ZIO_FLAG_CONFIG_HELD, zb));
1272		if (error)
1273			return (error);
1274		if (BP_SHOULD_BYTESWAP(&blk))
1275			byteswap_uint64_array(&gbh, SPA_GANGBLOCKSIZE);
1276		for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
1277			if (BP_IS_HOLE(&gbh.zg_blkptr[g]))
1278				break;
1279			error = zdb_space_map_claim(spa, &gbh.zg_blkptr[g], zb);
1280			if (error)
1281				return (error);
1282		}
1283	}
1284
1285	return (0);
1286}
1287
1288static void
1289zdb_leak(space_map_t *sm, uint64_t start, uint64_t size)
1290{
1291	metaslab_t *msp;
1292
1293	/* LINTED */
1294	msp = (metaslab_t *)((char *)sm - offsetof(metaslab_t, ms_allocmap[0]));
1295
1296	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
1297	    (u_longlong_t)msp->ms_group->mg_vd->vdev_id,
1298	    (u_longlong_t)start,
1299	    (u_longlong_t)size);
1300}
1301
1302static void
1303zdb_space_map_unload(spa_t *spa)
1304{
1305	vdev_t *rvd = spa->spa_root_vdev;
1306	vdev_t *vd;
1307	int c, m;
1308
1309	for (c = 0; c < rvd->vdev_children; c++) {
1310		vd = rvd->vdev_child[c];
1311		for (m = 0; m < vd->vdev_ms_count; m++) {
1312			metaslab_t *msp = vd->vdev_ms[m];
1313			mutex_enter(&msp->ms_lock);
1314			space_map_vacate(&msp->ms_allocmap[0], zdb_leak,
1315			    &msp->ms_allocmap[0]);
1316			space_map_unload(&msp->ms_allocmap[0]);
1317			space_map_vacate(&msp->ms_freemap[0], NULL, NULL);
1318			mutex_exit(&msp->ms_lock);
1319		}
1320	}
1321}
1322
1323static void
1324zdb_refresh_ubsync(spa_t *spa)
1325{
1326	uberblock_t ub = { 0 };
1327	vdev_t *rvd = spa->spa_root_vdev;
1328	zio_t *zio;
1329
1330	/*
1331	 * Reload the uberblock.
1332	 */
1333	zio = zio_root(spa, NULL, NULL,
1334	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1335	vdev_uberblock_load(zio, rvd, &ub);
1336	(void) zio_wait(zio);
1337
1338	if (ub.ub_txg != 0)
1339		spa->spa_ubsync = ub;
1340}
1341
1342/*
1343 * Verify that the sum of the sizes of all blocks in the pool adds up
1344 * to the SPA's sa_alloc total.
1345 */
1346typedef struct zdb_blkstats {
1347	uint64_t	zb_asize;
1348	uint64_t	zb_lsize;
1349	uint64_t	zb_psize;
1350	uint64_t	zb_count;
1351} zdb_blkstats_t;
1352
1353#define	DMU_OT_DEFERRED	DMU_OT_NONE
1354#define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
1355
1356#define	ZB_TOTAL	ZB_MAXLEVEL
1357
1358typedef struct zdb_cb {
1359	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][DMU_OT_TOTAL + 1];
1360	uint64_t	zcb_errors[256];
1361	traverse_blk_cache_t *zcb_cache;
1362	int		zcb_readfails;
1363	int		zcb_haderrors;
1364} zdb_cb_t;
1365
1366static void
1367zdb_count_block(spa_t *spa, zdb_cb_t *zcb, blkptr_t *bp, int type)
1368{
1369	int i, error;
1370
1371	for (i = 0; i < 4; i++) {
1372		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
1373		int t = (i & 1) ? type : DMU_OT_TOTAL;
1374		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
1375
1376		zb->zb_asize += BP_GET_ASIZE(bp);
1377		zb->zb_lsize += BP_GET_LSIZE(bp);
1378		zb->zb_psize += BP_GET_PSIZE(bp);
1379		zb->zb_count++;
1380	}
1381
1382	if (dump_opt['L'])
1383		return;
1384
1385	error = zdb_space_map_claim(spa, bp, &zcb->zcb_cache->bc_bookmark);
1386
1387	if (error == 0)
1388		return;
1389
1390	if (error == EAGAIN)
1391		(void) fatal("double-allocation, bp=%p", bp);
1392
1393	if (error == ESTALE)
1394		(void) fatal("reference to freed block, bp=%p", bp);
1395
1396	(void) fatal("fatal error %d in bp %p", error, bp);
1397}
1398
1399static int
1400zdb_blkptr_cb(traverse_blk_cache_t *bc, spa_t *spa, void *arg)
1401{
1402	zbookmark_t *zb = &bc->bc_bookmark;
1403	zdb_cb_t *zcb = arg;
1404	blkptr_t *bp = &bc->bc_blkptr;
1405	dmu_object_type_t type = BP_GET_TYPE(bp);
1406	char blkbuf[BP_SPRINTF_LEN];
1407	int error = 0;
1408
1409	if (bc->bc_errno) {
1410		if (zcb->zcb_readfails++ < 10 && dump_opt['L']) {
1411			zdb_refresh_ubsync(spa);
1412			error = EAGAIN;
1413		} else {
1414			zcb->zcb_haderrors = 1;
1415			zcb->zcb_errors[bc->bc_errno]++;
1416			error = ERESTART;
1417		}
1418
1419		if (dump_opt['b'] >= 3 || (dump_opt['b'] >= 2 && bc->bc_errno))
1420			sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1421		else
1422			blkbuf[0] = '\0';
1423
1424		(void) printf("zdb_blkptr_cb: Got error %d reading "
1425		    "<%llu, %llu, %lld, %llx> %s -- %s\n",
1426		    bc->bc_errno,
1427		    (u_longlong_t)zb->zb_objset,
1428		    (u_longlong_t)zb->zb_object,
1429		    (u_longlong_t)zb->zb_level,
1430		    (u_longlong_t)zb->zb_blkid,
1431		    blkbuf,
1432		    error == EAGAIN ? "retrying" : "skipping");
1433
1434		return (error);
1435	}
1436
1437	zcb->zcb_readfails = 0;
1438
1439	ASSERT(!BP_IS_HOLE(bp));
1440
1441	if (dump_opt['b'] >= 4) {
1442		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1443		(void) printf("objset %llu object %llu offset 0x%llx %s\n",
1444		    (u_longlong_t)zb->zb_objset,
1445		    (u_longlong_t)zb->zb_object,
1446		    (u_longlong_t)blkid2offset(bc->bc_dnode,
1447		    zb->zb_level, zb->zb_blkid), blkbuf);
1448	}
1449
1450	zdb_count_block(spa, zcb, bp, type);
1451
1452	return (0);
1453}
1454
1455static int
1456dump_block_stats(spa_t *spa)
1457{
1458	traverse_handle_t *th;
1459	zdb_cb_t zcb = { 0 };
1460	traverse_blk_cache_t dummy_cache = { 0 };
1461	zdb_blkstats_t *zb, *tzb;
1462	uint64_t alloc, space, logalloc;
1463	vdev_t *rvd = spa->spa_root_vdev;
1464	int leaks = 0;
1465	int advance = zdb_advance;
1466	int c, e, flags;
1467
1468	zcb.zcb_cache = &dummy_cache;
1469
1470	if (dump_opt['c'])
1471		advance |= ADVANCE_DATA;
1472
1473	advance |= ADVANCE_PRUNE | ADVANCE_ZIL;
1474
1475	(void) printf("\nTraversing all blocks to %sverify"
1476	    " nothing leaked ...\n",
1477	    dump_opt['c'] ? "verify checksums and " : "");
1478
1479	/*
1480	 * Load all space maps.  As we traverse the pool, if we find a block
1481	 * that's not in its space map, that indicates a double-allocation,
1482	 * reference to a freed block, or an unclaimed block.  Otherwise we
1483	 * remove the block from the space map.  If the space maps are not
1484	 * empty when we're done, that indicates leaked blocks.
1485	 */
1486	if (!dump_opt['L'])
1487		zdb_space_map_load(spa);
1488
1489	/*
1490	 * If there's a deferred-free bplist, process that first.
1491	 */
1492	if (spa->spa_sync_bplist_obj != 0) {
1493		bplist_t *bpl = &spa->spa_sync_bplist;
1494		blkptr_t blk;
1495		uint64_t itor = 0;
1496
1497		VERIFY(0 == bplist_open(bpl, spa->spa_meta_objset,
1498		    spa->spa_sync_bplist_obj));
1499
1500		while (bplist_iterate(bpl, &itor, &blk) == 0) {
1501			if (dump_opt['b'] >= 4) {
1502				char blkbuf[BP_SPRINTF_LEN];
1503				sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &blk);
1504				(void) printf("[%s] %s\n",
1505				    "deferred free", blkbuf);
1506			}
1507			zdb_count_block(spa, &zcb, &blk, DMU_OT_DEFERRED);
1508		}
1509
1510		bplist_close(bpl);
1511	}
1512
1513	/*
1514	 * Now traverse the pool.  If we're reading all data to verify
1515	 * checksums, do a scrubbing read so that we validate all copies.
1516	 */
1517	flags = ZIO_FLAG_CANFAIL;
1518	if (advance & ADVANCE_DATA)
1519		flags |= ZIO_FLAG_SCRUB;
1520	th = traverse_init(spa, zdb_blkptr_cb, &zcb, advance, flags);
1521	th->th_noread = zdb_noread;
1522
1523	traverse_add_pool(th, 0, spa_first_txg(spa) + TXG_CONCURRENT_STATES);
1524
1525	while (traverse_more(th) == EAGAIN)
1526		continue;
1527
1528	traverse_fini(th);
1529
1530	if (zcb.zcb_haderrors) {
1531		(void) printf("\nError counts:\n\n");
1532		(void) printf("\t%5s  %s\n", "errno", "count");
1533		for (e = 0; e < 256; e++) {
1534			if (zcb.zcb_errors[e] != 0) {
1535				(void) printf("\t%5d  %llu\n",
1536				    e, (u_longlong_t)zcb.zcb_errors[e]);
1537			}
1538		}
1539	}
1540
1541	/*
1542	 * Report any leaked segments.
1543	 */
1544	if (!dump_opt['L'])
1545		zdb_space_map_unload(spa);
1546
1547	if (dump_opt['L'])
1548		(void) printf("\n\n *** Live pool traversal; "
1549		    "block counts are only approximate ***\n\n");
1550
1551	alloc = spa_get_alloc(spa);
1552	space = spa_get_space(spa);
1553
1554	/*
1555	 * Log blocks allocated from a separate log device don't count
1556	 * as part of the normal pool space; factor them in here.
1557	 */
1558	logalloc = 0;
1559
1560	for (c = 0; c < rvd->vdev_children; c++)
1561		if (rvd->vdev_child[c]->vdev_islog)
1562			logalloc += rvd->vdev_child[c]->vdev_stat.vs_alloc;
1563
1564	tzb = &zcb.zcb_type[ZB_TOTAL][DMU_OT_TOTAL];
1565
1566	if (tzb->zb_asize == alloc + logalloc) {
1567		(void) printf("\n\tNo leaks (block sum matches space"
1568		    " maps exactly)\n");
1569	} else {
1570		(void) printf("block traversal size %llu != alloc %llu "
1571		    "(leaked %lld)\n",
1572		    (u_longlong_t)tzb->zb_asize,
1573		    (u_longlong_t)alloc + logalloc,
1574		    (u_longlong_t)(alloc + logalloc - tzb->zb_asize));
1575		leaks = 1;
1576	}
1577
1578	if (tzb->zb_count == 0)
1579		return (2);
1580
1581	(void) printf("\n");
1582	(void) printf("\tbp count:      %10llu\n",
1583	    (u_longlong_t)tzb->zb_count);
1584	(void) printf("\tbp logical:    %10llu\t avg: %6llu\n",
1585	    (u_longlong_t)tzb->zb_lsize,
1586	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
1587	(void) printf("\tbp physical:   %10llu\t avg:"
1588	    " %6llu\tcompression: %6.2f\n",
1589	    (u_longlong_t)tzb->zb_psize,
1590	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
1591	    (double)tzb->zb_lsize / tzb->zb_psize);
1592	(void) printf("\tbp allocated:  %10llu\t avg:"
1593	    " %6llu\tcompression: %6.2f\n",
1594	    (u_longlong_t)tzb->zb_asize,
1595	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
1596	    (double)tzb->zb_lsize / tzb->zb_asize);
1597	(void) printf("\tSPA allocated: %10llu\tused: %5.2f%%\n",
1598	    (u_longlong_t)alloc, 100.0 * alloc / space);
1599
1600	if (dump_opt['b'] >= 2) {
1601		int l, t, level;
1602		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
1603		    "\t  avg\t comp\t%%Total\tType\n");
1604
1605		for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
1606			char csize[6], lsize[6], psize[6], asize[6], avg[6];
1607			char *typename;
1608
1609			typename = t == DMU_OT_DEFERRED ? "deferred free" :
1610			    t == DMU_OT_TOTAL ? "Total" : dmu_ot[t].ot_name;
1611
1612			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
1613				(void) printf("%6s\t%5s\t%5s\t%5s"
1614				    "\t%5s\t%5s\t%6s\t%s\n",
1615				    "-",
1616				    "-",
1617				    "-",
1618				    "-",
1619				    "-",
1620				    "-",
1621				    "-",
1622				    typename);
1623				continue;
1624			}
1625
1626			for (l = ZB_TOTAL - 1; l >= -1; l--) {
1627				level = (l == -1 ? ZB_TOTAL : l);
1628				zb = &zcb.zcb_type[level][t];
1629
1630				if (zb->zb_asize == 0)
1631					continue;
1632
1633				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
1634					continue;
1635
1636				if (level == 0 && zb->zb_asize ==
1637				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
1638					continue;
1639
1640				nicenum(zb->zb_count, csize);
1641				nicenum(zb->zb_lsize, lsize);
1642				nicenum(zb->zb_psize, psize);
1643				nicenum(zb->zb_asize, asize);
1644				nicenum(zb->zb_asize / zb->zb_count, avg);
1645
1646				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
1647				    "\t%5.2f\t%6.2f\t",
1648				    csize, lsize, psize, asize, avg,
1649				    (double)zb->zb_lsize / zb->zb_psize,
1650				    100.0 * zb->zb_asize / tzb->zb_asize);
1651
1652				if (level == ZB_TOTAL)
1653					(void) printf("%s\n", typename);
1654				else
1655					(void) printf("    L%d %s\n",
1656					    level, typename);
1657			}
1658		}
1659	}
1660
1661	(void) printf("\n");
1662
1663	if (leaks)
1664		return (2);
1665
1666	if (zcb.zcb_haderrors)
1667		return (3);
1668
1669	return (0);
1670}
1671
1672static void
1673dump_zpool(spa_t *spa)
1674{
1675	dsl_pool_t *dp = spa_get_dsl(spa);
1676	int rc = 0;
1677
1678	if (dump_opt['u'])
1679		dump_uberblock(&spa->spa_uberblock);
1680
1681	if (dump_opt['d'] || dump_opt['i']) {
1682		dump_dir(dp->dp_meta_objset);
1683		if (dump_opt['d'] >= 3) {
1684			dump_bplist(dp->dp_meta_objset,
1685			    spa->spa_sync_bplist_obj, "Deferred frees");
1686			dump_dtl(spa->spa_root_vdev, 0);
1687			dump_metaslabs(spa);
1688		}
1689		(void) dmu_objset_find(spa->spa_name, dump_one_dir, NULL,
1690		    DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
1691	}
1692
1693	if (dump_opt['b'] || dump_opt['c'])
1694		rc = dump_block_stats(spa);
1695
1696	if (dump_opt['s'])
1697		show_pool_stats(spa);
1698
1699	if (rc != 0)
1700		exit(rc);
1701}
1702
1703#define	ZDB_FLAG_CHECKSUM	0x0001
1704#define	ZDB_FLAG_DECOMPRESS	0x0002
1705#define	ZDB_FLAG_BSWAP		0x0004
1706#define	ZDB_FLAG_GBH		0x0008
1707#define	ZDB_FLAG_INDIRECT	0x0010
1708#define	ZDB_FLAG_PHYS		0x0020
1709#define	ZDB_FLAG_RAW		0x0040
1710#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
1711
1712int flagbits[256];
1713
1714static void
1715zdb_print_blkptr(blkptr_t *bp, int flags)
1716{
1717	dva_t *dva = bp->blk_dva;
1718	int d;
1719
1720	if (flags & ZDB_FLAG_BSWAP)
1721		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
1722	/*
1723	 * Super-ick warning:  This code is also duplicated in
1724	 * cmd/mdb/common/modules/zfs/zfs.c .  Yeah, I hate code
1725	 * replication, too.
1726	 */
1727	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1728		(void) printf("\tDVA[%d]: vdev_id %lld / %llx\n", d,
1729		    (longlong_t)DVA_GET_VDEV(&dva[d]),
1730		    (longlong_t)DVA_GET_OFFSET(&dva[d]));
1731		(void) printf("\tDVA[%d]:       GANG: %-5s  GRID:  %04llx\t"
1732		    "ASIZE: %llx\n", d,
1733		    DVA_GET_GANG(&dva[d]) ? "TRUE" : "FALSE",
1734		    (longlong_t)DVA_GET_GRID(&dva[d]),
1735		    (longlong_t)DVA_GET_ASIZE(&dva[d]));
1736		(void) printf("\tDVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", d,
1737		    (u_longlong_t)DVA_GET_VDEV(&dva[d]),
1738		    (longlong_t)DVA_GET_OFFSET(&dva[d]),
1739		    (longlong_t)BP_GET_PSIZE(bp),
1740		    BP_SHOULD_BYTESWAP(bp) ? "e" : "",
1741		    !DVA_GET_GANG(&dva[d]) && BP_GET_LEVEL(bp) != 0 ?
1742		    "d" : "",
1743		    DVA_GET_GANG(&dva[d]) ? "g" : "",
1744		    BP_GET_COMPRESS(bp) != 0 ? "d" : "");
1745	}
1746	(void) printf("\tLSIZE:  %-16llx\t\tPSIZE: %llx\n",
1747	    (longlong_t)BP_GET_LSIZE(bp), (longlong_t)BP_GET_PSIZE(bp));
1748	(void) printf("\tENDIAN: %6s\t\t\t\t\tTYPE:  %s\n",
1749	    BP_GET_BYTEORDER(bp) ? "LITTLE" : "BIG",
1750	    dmu_ot[BP_GET_TYPE(bp)].ot_name);
1751	(void) printf("\tBIRTH:  %-16llx   LEVEL: %-2llu\tFILL:  %llx\n",
1752	    (u_longlong_t)bp->blk_birth, (u_longlong_t)BP_GET_LEVEL(bp),
1753	    (u_longlong_t)bp->blk_fill);
1754	(void) printf("\tCKFUNC: %-16s\t\tCOMP:  %s\n",
1755	    zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name,
1756	    zio_compress_table[BP_GET_COMPRESS(bp)].ci_name);
1757	(void) printf("\tCKSUM:  %llx:%llx:%llx:%llx\n",
1758	    (u_longlong_t)bp->blk_cksum.zc_word[0],
1759	    (u_longlong_t)bp->blk_cksum.zc_word[1],
1760	    (u_longlong_t)bp->blk_cksum.zc_word[2],
1761	    (u_longlong_t)bp->blk_cksum.zc_word[3]);
1762}
1763
1764static void
1765zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
1766{
1767	int i;
1768
1769	for (i = 0; i < nbps; i++)
1770		zdb_print_blkptr(&bp[i], flags);
1771}
1772
1773static void
1774zdb_dump_gbh(void *buf, int flags)
1775{
1776	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
1777}
1778
1779static void
1780zdb_dump_block_raw(void *buf, uint64_t size, int flags)
1781{
1782	if (flags & ZDB_FLAG_BSWAP)
1783		byteswap_uint64_array(buf, size);
1784	(void) write(2, buf, size);
1785}
1786
1787static void
1788zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
1789{
1790	uint64_t *d = (uint64_t *)buf;
1791	int nwords = size / sizeof (uint64_t);
1792	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
1793	int i, j;
1794	char *hdr, *c;
1795
1796
1797	if (do_bswap)
1798		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
1799	else
1800		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
1801
1802	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
1803
1804	for (i = 0; i < nwords; i += 2) {
1805		(void) printf("%06llx:  %016llx  %016llx  ",
1806		    (u_longlong_t)(i * sizeof (uint64_t)),
1807		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
1808		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
1809
1810		c = (char *)&d[i];
1811		for (j = 0; j < 2 * sizeof (uint64_t); j++)
1812			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
1813		(void) printf("\n");
1814	}
1815}
1816
1817/*
1818 * There are two acceptable formats:
1819 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
1820 *	child[.child]*    - For example: 0.1.1
1821 *
1822 * The second form can be used to specify arbitrary vdevs anywhere
1823 * in the heirarchy.  For example, in a pool with a mirror of
1824 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
1825 */
1826static vdev_t *
1827zdb_vdev_lookup(vdev_t *vdev, char *path)
1828{
1829	char *s, *p, *q;
1830	int i;
1831
1832	if (vdev == NULL)
1833		return (NULL);
1834
1835	/* First, assume the x.x.x.x format */
1836	i = (int)strtoul(path, &s, 10);
1837	if (s == path || (s && *s != '.' && *s != '\0'))
1838		goto name;
1839	if (i < 0 || i >= vdev->vdev_children)
1840		return (NULL);
1841
1842	vdev = vdev->vdev_child[i];
1843	if (*s == '\0')
1844		return (vdev);
1845	return (zdb_vdev_lookup(vdev, s+1));
1846
1847name:
1848	for (i = 0; i < vdev->vdev_children; i++) {
1849		vdev_t *vc = vdev->vdev_child[i];
1850
1851		if (vc->vdev_path == NULL) {
1852			vc = zdb_vdev_lookup(vc, path);
1853			if (vc == NULL)
1854				continue;
1855			else
1856				return (vc);
1857		}
1858
1859		p = strrchr(vc->vdev_path, '/');
1860		p = p ? p + 1 : vc->vdev_path;
1861		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
1862
1863		if (strcmp(vc->vdev_path, path) == 0)
1864			return (vc);
1865		if (strcmp(p, path) == 0)
1866			return (vc);
1867		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
1868			return (vc);
1869	}
1870
1871	return (NULL);
1872}
1873
1874/*
1875 * Read a block from a pool and print it out.  The syntax of the
1876 * block descriptor is:
1877 *
1878 *	pool:vdev_specifier:offset:size[:flags]
1879 *
1880 *	pool           - The name of the pool you wish to read from
1881 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
1882 *	offset         - offset, in hex, in bytes
1883 *	size           - Amount of data to read, in hex, in bytes
1884 *	flags          - A string of characters specifying options
1885 *		 b: Decode a blkptr at given offset within block
1886 *		*c: Calculate and display checksums
1887 *		*d: Decompress data before dumping
1888 *		 e: Byteswap data before dumping
1889 *		*g: Display data as a gang block header
1890 *		*i: Display as an indirect block
1891 *		 p: Do I/O to physical offset
1892 *		 r: Dump raw data to stdout
1893 *
1894 *              * = not yet implemented
1895 */
1896static void
1897zdb_read_block(char *thing, spa_t **spap)
1898{
1899	spa_t *spa = *spap;
1900	int flags = 0;
1901	uint64_t offset = 0, size = 0, blkptr_offset = 0;
1902	zio_t *zio;
1903	vdev_t *vd;
1904	void *buf;
1905	char *s, *p, *dup, *spa_name, *vdev, *flagstr;
1906	int i, error, zio_flags;
1907
1908	dup = strdup(thing);
1909	s = strtok(dup, ":");
1910	spa_name = s ? s : "";
1911	s = strtok(NULL, ":");
1912	vdev = s ? s : "";
1913	s = strtok(NULL, ":");
1914	offset = strtoull(s ? s : "", NULL, 16);
1915	s = strtok(NULL, ":");
1916	size = strtoull(s ? s : "", NULL, 16);
1917	s = strtok(NULL, ":");
1918	flagstr = s ? s : "";
1919
1920	s = NULL;
1921	if (size == 0)
1922		s = "size must not be zero";
1923	if (!IS_P2ALIGNED(size, DEV_BSIZE))
1924		s = "size must be a multiple of sector size";
1925	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
1926		s = "offset must be a multiple of sector size";
1927	if (s) {
1928		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
1929		free(dup);
1930		return;
1931	}
1932
1933	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
1934		for (i = 0; flagstr[i]; i++) {
1935			int bit = flagbits[(uchar_t)flagstr[i]];
1936
1937			if (bit == 0) {
1938				(void) printf("***Invalid flag: %c\n",
1939				    flagstr[i]);
1940				continue;
1941			}
1942			flags |= bit;
1943
1944			/* If it's not something with an argument, keep going */
1945			if ((bit & (ZDB_FLAG_CHECKSUM | ZDB_FLAG_DECOMPRESS |
1946			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
1947				continue;
1948
1949			p = &flagstr[i + 1];
1950			if (bit == ZDB_FLAG_PRINT_BLKPTR)
1951				blkptr_offset = strtoull(p, &p, 16);
1952			if (*p != ':' && *p != '\0') {
1953				(void) printf("***Invalid flag arg: '%s'\n", s);
1954				free(dup);
1955				return;
1956			}
1957		}
1958	}
1959
1960	if (spa == NULL || spa->spa_name == NULL ||
1961	    strcmp(spa->spa_name, spa_name)) {
1962		if (spa && spa->spa_name)
1963			spa_close(spa, (void *)zdb_read_block);
1964		error = spa_open(spa_name, spap, (void *)zdb_read_block);
1965		if (error)
1966			fatal("Failed to open pool '%s': %s",
1967			    spa_name, strerror(error));
1968		spa = *spap;
1969	}
1970
1971	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
1972	if (vd == NULL) {
1973		(void) printf("***Invalid vdev: %s\n", vdev);
1974		free(dup);
1975		return;
1976	} else {
1977		if (vd->vdev_path)
1978			(void) printf("Found vdev: %s\n", vd->vdev_path);
1979		else
1980			(void) printf("Found vdev type: %s\n",
1981			    vd->vdev_ops->vdev_op_type);
1982	}
1983
1984	buf = umem_alloc(size, UMEM_NOFAIL);
1985
1986	zio_flags = ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
1987	    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_NOBOOKMARK;
1988
1989	if (flags & ZDB_FLAG_PHYS)
1990		zio_flags |= ZIO_FLAG_PHYSICAL;
1991
1992	zio = zio_root(spa, NULL, NULL, 0);
1993	/* XXX todo - cons up a BP so RAID-Z will be happy */
1994	zio_nowait(zio_vdev_child_io(zio, NULL, vd, offset, buf, size,
1995	    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ, zio_flags, NULL, NULL));
1996	error = zio_wait(zio);
1997
1998	if (error) {
1999		(void) printf("Read of %s failed, error: %d\n", thing, error);
2000		goto out;
2001	}
2002
2003	if (flags & ZDB_FLAG_PRINT_BLKPTR)
2004		zdb_print_blkptr((blkptr_t *)(void *)
2005		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
2006	else if (flags & ZDB_FLAG_RAW)
2007		zdb_dump_block_raw(buf, size, flags);
2008	else if (flags & ZDB_FLAG_INDIRECT)
2009		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
2010		    flags);
2011	else if (flags & ZDB_FLAG_GBH)
2012		zdb_dump_gbh(buf, flags);
2013	else
2014		zdb_dump_block(thing, buf, size, flags);
2015
2016out:
2017	umem_free(buf, size);
2018	free(dup);
2019}
2020
2021int
2022main(int argc, char **argv)
2023{
2024	int i, c;
2025	struct rlimit rl = { 1024, 1024 };
2026	spa_t *spa;
2027	objset_t *os = NULL;
2028	char *endstr;
2029	int dump_all = 1;
2030	int verbose = 0;
2031	int error;
2032	int flag, set;
2033
2034	(void) setrlimit(RLIMIT_NOFILE, &rl);
2035	(void) enable_extended_FILE_stdio(-1, -1);
2036
2037	dprintf_setup(&argc, argv);
2038
2039	while ((c = getopt(argc, argv, "udibcsvCLO:B:UlR")) != -1) {
2040		switch (c) {
2041		case 'u':
2042		case 'd':
2043		case 'i':
2044		case 'b':
2045		case 'c':
2046		case 's':
2047		case 'C':
2048		case 'l':
2049		case 'R':
2050			dump_opt[c]++;
2051			dump_all = 0;
2052			break;
2053		case 'L':
2054			dump_opt[c]++;
2055			break;
2056		case 'O':
2057			endstr = optarg;
2058			if (endstr[0] == '!') {
2059				endstr++;
2060				set = 0;
2061			} else {
2062				set = 1;
2063			}
2064			if (strcmp(endstr, "post") == 0) {
2065				flag = ADVANCE_PRE;
2066				set = !set;
2067			} else if (strcmp(endstr, "pre") == 0) {
2068				flag = ADVANCE_PRE;
2069			} else if (strcmp(endstr, "prune") == 0) {
2070				flag = ADVANCE_PRUNE;
2071			} else if (strcmp(endstr, "data") == 0) {
2072				flag = ADVANCE_DATA;
2073			} else if (strcmp(endstr, "holes") == 0) {
2074				flag = ADVANCE_HOLES;
2075			} else {
2076				usage();
2077			}
2078			if (set)
2079				zdb_advance |= flag;
2080			else
2081				zdb_advance &= ~flag;
2082			break;
2083		case 'B':
2084			endstr = optarg - 1;
2085			zdb_noread.zb_objset = strtoull(endstr + 1, &endstr, 0);
2086			zdb_noread.zb_object = strtoull(endstr + 1, &endstr, 0);
2087			zdb_noread.zb_level = strtol(endstr + 1, &endstr, 0);
2088			zdb_noread.zb_blkid = strtoull(endstr + 1, &endstr, 16);
2089			(void) printf("simulating bad block "
2090			    "<%llu, %llu, %lld, %llx>\n",
2091			    (u_longlong_t)zdb_noread.zb_objset,
2092			    (u_longlong_t)zdb_noread.zb_object,
2093			    (u_longlong_t)zdb_noread.zb_level,
2094			    (u_longlong_t)zdb_noread.zb_blkid);
2095			break;
2096		case 'v':
2097			verbose++;
2098			break;
2099		case 'U':
2100			spa_config_dir = "/tmp";
2101			break;
2102		default:
2103			usage();
2104			break;
2105		}
2106	}
2107
2108	kernel_init(FREAD);
2109
2110	/*
2111	 * Disable vdev caching.  If we don't do this, live pool traversal
2112	 * won't make progress because it will never see disk updates.
2113	 */
2114	zfs_vdev_cache_size = 0;
2115
2116	for (c = 0; c < 256; c++) {
2117		if (dump_all && c != 'L' && c != 'l' && c != 'R')
2118			dump_opt[c] = 1;
2119		if (dump_opt[c])
2120			dump_opt[c] += verbose;
2121	}
2122
2123	argc -= optind;
2124	argv += optind;
2125
2126	if (argc < 1) {
2127		if (dump_opt['C']) {
2128			dump_config(NULL);
2129			return (0);
2130		}
2131		usage();
2132	}
2133
2134	if (dump_opt['l']) {
2135		dump_label(argv[0]);
2136		return (0);
2137	}
2138
2139	if (dump_opt['R']) {
2140		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
2141		flagbits['c'] = ZDB_FLAG_CHECKSUM;
2142		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
2143		flagbits['e'] = ZDB_FLAG_BSWAP;
2144		flagbits['g'] = ZDB_FLAG_GBH;
2145		flagbits['i'] = ZDB_FLAG_INDIRECT;
2146		flagbits['p'] = ZDB_FLAG_PHYS;
2147		flagbits['r'] = ZDB_FLAG_RAW;
2148
2149		spa = NULL;
2150		while (argv[0]) {
2151			zdb_read_block(argv[0], &spa);
2152			argv++;
2153			argc--;
2154		}
2155		if (spa)
2156			spa_close(spa, (void *)zdb_read_block);
2157		return (0);
2158	}
2159
2160	if (dump_opt['C'])
2161		dump_config(argv[0]);
2162
2163	if (strchr(argv[0], '/') != NULL) {
2164		error = dmu_objset_open(argv[0], DMU_OST_ANY,
2165		    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
2166	} else {
2167		error = spa_open(argv[0], &spa, FTAG);
2168	}
2169
2170	if (error)
2171		fatal("can't open %s: %s", argv[0], strerror(error));
2172
2173	argv++;
2174	if (--argc > 0) {
2175		zopt_objects = argc;
2176		zopt_object = calloc(zopt_objects, sizeof (uint64_t));
2177		for (i = 0; i < zopt_objects; i++) {
2178			errno = 0;
2179			zopt_object[i] = strtoull(argv[i], NULL, 0);
2180			if (zopt_object[i] == 0 && errno != 0)
2181				fatal("bad object number %s: %s",
2182				    argv[i], strerror(errno));
2183		}
2184	}
2185
2186	if (os != NULL) {
2187		dump_dir(os);
2188		dmu_objset_close(os);
2189	} else {
2190		dump_zpool(spa);
2191		spa_close(spa, FTAG);
2192	}
2193
2194	kernel_fini();
2195
2196	return (0);
2197}
2198