zdb.c revision 55434c770c89aa1b84474f2559a106803511aba0
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}
704
705/*ARGSUSED*/
706static void
707dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
708{
709	dsl_dataset_phys_t *ds = data;
710	time_t crtime;
711	char used[6], compressed[6], uncompressed[6], unique[6];
712	char blkbuf[BP_SPRINTF_LEN];
713
714	if (ds == NULL)
715		return;
716
717	ASSERT(size == sizeof (*ds));
718	crtime = ds->ds_creation_time;
719	nicenum(ds->ds_used_bytes, used);
720	nicenum(ds->ds_compressed_bytes, compressed);
721	nicenum(ds->ds_uncompressed_bytes, uncompressed);
722	nicenum(ds->ds_unique_bytes, unique);
723	sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ds->ds_bp);
724
725	(void) printf("\t\tdataset_obj = %llu\n",
726	    (u_longlong_t)ds->ds_dir_obj);
727	(void) printf("\t\tprev_snap_obj = %llu\n",
728	    (u_longlong_t)ds->ds_prev_snap_obj);
729	(void) printf("\t\tprev_snap_txg = %llu\n",
730	    (u_longlong_t)ds->ds_prev_snap_txg);
731	(void) printf("\t\tnext_snap_obj = %llu\n",
732	    (u_longlong_t)ds->ds_next_snap_obj);
733	(void) printf("\t\tsnapnames_zapobj = %llu\n",
734	    (u_longlong_t)ds->ds_snapnames_zapobj);
735	(void) printf("\t\tnum_children = %llu\n",
736	    (u_longlong_t)ds->ds_num_children);
737	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
738	(void) printf("\t\tcreation_txg = %llu\n",
739	    (u_longlong_t)ds->ds_creation_txg);
740	(void) printf("\t\tdeadlist_obj = %llu\n",
741	    (u_longlong_t)ds->ds_deadlist_obj);
742	(void) printf("\t\tused_bytes = %s\n", used);
743	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
744	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
745	(void) printf("\t\tunique = %s\n", unique);
746	(void) printf("\t\tfsid_guid = %llu\n",
747	    (u_longlong_t)ds->ds_fsid_guid);
748	(void) printf("\t\tguid = %llu\n",
749	    (u_longlong_t)ds->ds_guid);
750	(void) printf("\t\tflags = %llx\n",
751	    (u_longlong_t)ds->ds_flags);
752	(void) printf("\t\tbp = %s\n", blkbuf);
753}
754
755static void
756dump_bplist(objset_t *mos, uint64_t object, char *name)
757{
758	bplist_t bpl = { 0 };
759	blkptr_t blk, *bp = &blk;
760	uint64_t itor = 0;
761	char bytes[6];
762	char comp[6];
763	char uncomp[6];
764
765	if (dump_opt['d'] < 3)
766		return;
767
768	VERIFY(0 == bplist_open(&bpl, mos, object));
769	if (bplist_empty(&bpl)) {
770		bplist_close(&bpl);
771		return;
772	}
773
774	nicenum(bpl.bpl_phys->bpl_bytes, bytes);
775	if (bpl.bpl_dbuf->db_size == sizeof (bplist_phys_t)) {
776		nicenum(bpl.bpl_phys->bpl_comp, comp);
777		nicenum(bpl.bpl_phys->bpl_uncomp, uncomp);
778		(void) printf("\n    %s: %llu entries, %s (%s/%s comp)\n",
779		    name, (u_longlong_t)bpl.bpl_phys->bpl_entries,
780		    bytes, comp, uncomp);
781	} else {
782		(void) printf("\n    %s: %llu entries, %s\n",
783		    name, (u_longlong_t)bpl.bpl_phys->bpl_entries, bytes);
784	}
785
786	if (dump_opt['d'] < 5) {
787		bplist_close(&bpl);
788		return;
789	}
790
791	(void) printf("\n");
792
793	while (bplist_iterate(&bpl, &itor, bp) == 0) {
794		char blkbuf[BP_SPRINTF_LEN];
795
796		ASSERT(bp->blk_birth != 0);
797		sprintf_blkptr_compact(blkbuf, bp, dump_opt['d'] > 5 ? 1 : 0);
798		(void) printf("\tItem %3llu: %s\n",
799		    (u_longlong_t)itor - 1, blkbuf);
800	}
801
802	bplist_close(&bpl);
803}
804
805/*ARGSUSED*/
806static void
807dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
808{
809	znode_phys_t *zp = data;
810	time_t z_crtime, z_atime, z_mtime, z_ctime;
811	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
812	int error;
813
814	ASSERT(size >= sizeof (znode_phys_t));
815
816	error = zfs_obj_to_path(os, object, path, sizeof (path));
817	if (error != 0) {
818		(void) snprintf(path, sizeof (path), "\?\?\?<object#%llu>",
819		    (u_longlong_t)object);
820	}
821
822	if (dump_opt['d'] < 3) {
823		(void) printf("\t%s\n", path);
824		return;
825	}
826
827	z_crtime = (time_t)zp->zp_crtime[0];
828	z_atime = (time_t)zp->zp_atime[0];
829	z_mtime = (time_t)zp->zp_mtime[0];
830	z_ctime = (time_t)zp->zp_ctime[0];
831
832	(void) printf("\tpath	%s\n", path);
833	(void) printf("\tatime	%s", ctime(&z_atime));
834	(void) printf("\tmtime	%s", ctime(&z_mtime));
835	(void) printf("\tctime	%s", ctime(&z_ctime));
836	(void) printf("\tcrtime	%s", ctime(&z_crtime));
837	(void) printf("\tgen	%llu\n", (u_longlong_t)zp->zp_gen);
838	(void) printf("\tmode	%llo\n", (u_longlong_t)zp->zp_mode);
839	(void) printf("\tsize	%llu\n", (u_longlong_t)zp->zp_size);
840	(void) printf("\tparent	%llu\n", (u_longlong_t)zp->zp_parent);
841	(void) printf("\tlinks	%llu\n", (u_longlong_t)zp->zp_links);
842	(void) printf("\txattr	%llu\n", (u_longlong_t)zp->zp_xattr);
843	(void) printf("\trdev	0x%016llx\n", (u_longlong_t)zp->zp_rdev);
844}
845
846/*ARGSUSED*/
847static void
848dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
849{
850}
851
852/*ARGSUSED*/
853static void
854dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
855{
856}
857
858static object_viewer_t *object_viewer[DMU_OT_NUMTYPES] = {
859	dump_none,		/* unallocated			*/
860	dump_zap,		/* object directory		*/
861	dump_uint64,		/* object array			*/
862	dump_none,		/* packed nvlist		*/
863	dump_packed_nvlist,	/* packed nvlist size		*/
864	dump_none,		/* bplist			*/
865	dump_none,		/* bplist header		*/
866	dump_none,		/* SPA space map header		*/
867	dump_none,		/* SPA space map		*/
868	dump_none,		/* ZIL intent log		*/
869	dump_dnode,		/* DMU dnode			*/
870	dump_dmu_objset,	/* DMU objset			*/
871	dump_dsl_dir,		/* DSL directory		*/
872	dump_zap,		/* DSL directory child map	*/
873	dump_zap,		/* DSL dataset snap map		*/
874	dump_zap,		/* DSL props			*/
875	dump_dsl_dataset,	/* DSL dataset			*/
876	dump_znode,		/* ZFS znode			*/
877	dump_acl,		/* ZFS ACL			*/
878	dump_uint8,		/* ZFS plain file		*/
879	dump_zap,		/* ZFS directory		*/
880	dump_zap,		/* ZFS master node		*/
881	dump_zap,		/* ZFS delete queue		*/
882	dump_uint8,		/* zvol object			*/
883	dump_zap,		/* zvol prop			*/
884	dump_uint8,		/* other uint8[]		*/
885	dump_uint64,		/* other uint64[]		*/
886	dump_zap,		/* other ZAP			*/
887	dump_zap,		/* persistent error log		*/
888	dump_uint8,		/* SPA history			*/
889	dump_uint64,		/* SPA history offsets		*/
890};
891
892static void
893dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
894{
895	dmu_buf_t *db = NULL;
896	dmu_object_info_t doi;
897	dnode_t *dn;
898	void *bonus = NULL;
899	size_t bsize = 0;
900	char iblk[6], dblk[6], lsize[6], asize[6], bonus_size[6], segsize[6];
901	char aux[50];
902	int error;
903
904	if (*print_header) {
905		(void) printf("\n    Object  lvl   iblk   dblk  lsize"
906		    "  asize  type\n");
907		*print_header = 0;
908	}
909
910	if (object == 0) {
911		dn = os->os->os_meta_dnode;
912	} else {
913		error = dmu_bonus_hold(os, object, FTAG, &db);
914		if (error)
915			fatal("dmu_bonus_hold(%llu) failed, errno %u",
916			    object, error);
917		bonus = db->db_data;
918		bsize = db->db_size;
919		dn = ((dmu_buf_impl_t *)db)->db_dnode;
920	}
921	dmu_object_info_from_dnode(dn, &doi);
922
923	nicenum(doi.doi_metadata_block_size, iblk);
924	nicenum(doi.doi_data_block_size, dblk);
925	nicenum(doi.doi_data_block_size * (doi.doi_max_block_offset + 1),
926	    lsize);
927	nicenum(doi.doi_physical_blks << 9, asize);
928	nicenum(doi.doi_bonus_size, bonus_size);
929
930	aux[0] = '\0';
931
932	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6)
933		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
934		zio_checksum_table[doi.doi_checksum].ci_name);
935
936	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6)
937		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
938		zio_compress_table[doi.doi_compress].ci_name);
939
940	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %s%s\n",
941	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk, lsize,
942	    asize, dmu_ot[doi.doi_type].ot_name, aux);
943
944	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
945		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %s\n",
946		    "", "", "", "", bonus_size, "bonus",
947		    dmu_ot[doi.doi_bonus_type].ot_name);
948	}
949
950	if (verbosity >= 4) {
951		object_viewer[doi.doi_bonus_type](os, object, bonus, bsize);
952		object_viewer[doi.doi_type](os, object, NULL, 0);
953		*print_header = 1;
954	}
955
956	if (verbosity >= 5)
957		dump_indirect(os, object, NULL, 0);
958
959	if (verbosity >= 5) {
960		/*
961		 * Report the list of segments that comprise the object.
962		 */
963		uint64_t start = 0;
964		uint64_t end;
965		uint64_t blkfill = 1;
966		int minlvl = 1;
967
968		if (dn->dn_type == DMU_OT_DNODE) {
969			minlvl = 0;
970			blkfill = DNODES_PER_BLOCK;
971		}
972
973		for (;;) {
974			error = dnode_next_offset(dn, B_FALSE, &start, minlvl,
975			    blkfill, 0);
976			if (error)
977				break;
978			end = start;
979			error = dnode_next_offset(dn, B_TRUE, &end, minlvl,
980			    blkfill, 0);
981			nicenum(end - start, segsize);
982			(void) printf("\t\tsegment [%016llx, %016llx)"
983			    " size %5s\n", (u_longlong_t)start,
984			    (u_longlong_t)end, segsize);
985			if (error)
986				break;
987			start = end;
988		}
989	}
990
991	if (db != NULL)
992		dmu_buf_rele(db, FTAG);
993}
994
995static char *objset_types[DMU_OST_NUMTYPES] = {
996	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
997
998/*ARGSUSED*/
999static void
1000dump_dir(objset_t *os)
1001{
1002	dmu_objset_stats_t dds;
1003	uint64_t object, object_count;
1004	uint64_t refdbytes, usedobjs, scratch;
1005	char numbuf[8];
1006	char blkbuf[BP_SPRINTF_LEN];
1007	char osname[MAXNAMELEN];
1008	char *type = "UNKNOWN";
1009	int verbosity = dump_opt['d'];
1010	int print_header = 1;
1011	int i, error;
1012
1013	dmu_objset_fast_stat(os, &dds);
1014
1015	if (dds.dds_type < DMU_OST_NUMTYPES)
1016		type = objset_types[dds.dds_type];
1017
1018	if (dds.dds_type == DMU_OST_META) {
1019		dds.dds_creation_txg = TXG_INITIAL;
1020		usedobjs = os->os->os_rootbp.blk_fill;
1021		refdbytes =
1022		    os->os->os_spa->spa_dsl_pool->dp_mos_dir->dd_used_bytes;
1023	} else {
1024		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
1025	}
1026
1027	ASSERT3U(usedobjs, ==, os->os->os_rootbp.blk_fill);
1028
1029	nicenum(refdbytes, numbuf);
1030
1031	if (verbosity >= 4) {
1032		(void) strcpy(blkbuf, ", rootbp ");
1033		sprintf_blkptr(blkbuf + strlen(blkbuf),
1034		    BP_SPRINTF_LEN - strlen(blkbuf), &os->os->os_rootbp);
1035	} else {
1036		blkbuf[0] = '\0';
1037	}
1038
1039	dmu_objset_name(os, osname);
1040
1041	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
1042	    "%s, %llu objects%s\n",
1043	    osname, type, (u_longlong_t)dmu_objset_id(os),
1044	    (u_longlong_t)dds.dds_creation_txg,
1045	    numbuf, (u_longlong_t)usedobjs, blkbuf);
1046
1047	dump_intent_log(dmu_objset_zil(os));
1048
1049	if (dmu_objset_ds(os) != NULL)
1050		dump_bplist(dmu_objset_pool(os)->dp_meta_objset,
1051		    dmu_objset_ds(os)->ds_phys->ds_deadlist_obj, "Deadlist");
1052
1053	if (verbosity < 2)
1054		return;
1055
1056	if (zopt_objects != 0) {
1057		for (i = 0; i < zopt_objects; i++)
1058			dump_object(os, zopt_object[i], verbosity,
1059			    &print_header);
1060		(void) printf("\n");
1061		return;
1062	}
1063
1064	dump_object(os, 0, verbosity, &print_header);
1065	object_count = 1;
1066
1067	object = 0;
1068	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
1069		dump_object(os, object, verbosity, &print_header);
1070		object_count++;
1071	}
1072
1073	ASSERT3U(object_count, ==, usedobjs);
1074
1075	(void) printf("\n");
1076
1077	if (error != ESRCH)
1078		fatal("dmu_object_next() = %d", error);
1079}
1080
1081static void
1082dump_uberblock(uberblock_t *ub)
1083{
1084	time_t timestamp = ub->ub_timestamp;
1085
1086	(void) printf("Uberblock\n\n");
1087	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1088	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1089	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1090	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1091	(void) printf("\ttimestamp = %llu UTC = %s",
1092	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1093	if (dump_opt['u'] >= 3) {
1094		char blkbuf[BP_SPRINTF_LEN];
1095		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ub->ub_rootbp);
1096		(void) printf("\trootbp = %s\n", blkbuf);
1097	}
1098	(void) printf("\n");
1099}
1100
1101static void
1102dump_config(const char *pool)
1103{
1104	spa_t *spa = NULL;
1105
1106	mutex_enter(&spa_namespace_lock);
1107	while ((spa = spa_next(spa)) != NULL) {
1108		if (pool == NULL)
1109			(void) printf("%s\n", spa_name(spa));
1110		if (pool == NULL || strcmp(pool, spa_name(spa)) == 0)
1111			dump_nvlist(spa->spa_config, 4);
1112	}
1113	mutex_exit(&spa_namespace_lock);
1114}
1115
1116static void
1117dump_label(const char *dev)
1118{
1119	int fd;
1120	vdev_label_t label;
1121	char *buf = label.vl_vdev_phys.vp_nvlist;
1122	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
1123	struct stat64 statbuf;
1124	uint64_t psize;
1125	int l;
1126
1127	if ((fd = open64(dev, O_RDONLY)) < 0) {
1128		(void) printf("cannot open '%s': %s\n", dev, strerror(errno));
1129		exit(1);
1130	}
1131
1132	if (fstat64(fd, &statbuf) != 0) {
1133		(void) printf("failed to stat '%s': %s\n", dev,
1134		    strerror(errno));
1135		exit(1);
1136	}
1137
1138	psize = statbuf.st_size;
1139	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
1140
1141	for (l = 0; l < VDEV_LABELS; l++) {
1142
1143		nvlist_t *config = NULL;
1144
1145		(void) printf("--------------------------------------------\n");
1146		(void) printf("LABEL %d\n", l);
1147		(void) printf("--------------------------------------------\n");
1148
1149		if (pread64(fd, &label, sizeof (label),
1150		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
1151			(void) printf("failed to read label %d\n", l);
1152			continue;
1153		}
1154
1155		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
1156			(void) printf("failed to unpack label %d\n", l);
1157			continue;
1158		}
1159		dump_nvlist(config, 4);
1160		nvlist_free(config);
1161	}
1162}
1163
1164/*ARGSUSED*/
1165static int
1166dump_one_dir(char *dsname, void *arg)
1167{
1168	int error;
1169	objset_t *os;
1170
1171	error = dmu_objset_open(dsname, DMU_OST_ANY,
1172	    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
1173	if (error) {
1174		(void) printf("Could not open %s\n", dsname);
1175		return (0);
1176	}
1177	dump_dir(os);
1178	dmu_objset_close(os);
1179	return (0);
1180}
1181
1182static void
1183zdb_space_map_load(spa_t *spa)
1184{
1185	vdev_t *rvd = spa->spa_root_vdev;
1186	vdev_t *vd;
1187	int c, m, error;
1188
1189	for (c = 0; c < rvd->vdev_children; c++) {
1190		vd = rvd->vdev_child[c];
1191		for (m = 0; m < vd->vdev_ms_count; m++) {
1192			metaslab_t *msp = vd->vdev_ms[m];
1193			mutex_enter(&msp->ms_lock);
1194			error = space_map_load(&msp->ms_allocmap[0], NULL,
1195			    SM_ALLOC, &msp->ms_smo, spa->spa_meta_objset);
1196			mutex_exit(&msp->ms_lock);
1197			if (error)
1198				fatal("%s bad space map #%d, error %d",
1199				    spa->spa_name, c, error);
1200		}
1201	}
1202}
1203
1204static int
1205zdb_space_map_claim(spa_t *spa, blkptr_t *bp, zbookmark_t *zb)
1206{
1207	dva_t *dva = bp->blk_dva;
1208	vdev_t *vd;
1209	metaslab_t *msp;
1210	space_map_t *allocmap, *freemap;
1211	int error;
1212	int d;
1213	blkptr_t blk = *bp;
1214
1215	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1216		uint64_t vdev = DVA_GET_VDEV(&dva[d]);
1217		uint64_t offset = DVA_GET_OFFSET(&dva[d]);
1218		uint64_t size = DVA_GET_ASIZE(&dva[d]);
1219
1220		if ((vd = vdev_lookup_top(spa, vdev)) == NULL)
1221			return (ENXIO);
1222
1223		if ((offset >> vd->vdev_ms_shift) >= vd->vdev_ms_count)
1224			return (ENXIO);
1225
1226		msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
1227		allocmap = &msp->ms_allocmap[0];
1228		freemap = &msp->ms_freemap[0];
1229
1230		/* Prepare our copy of the bp in case we need to read GBHs */
1231		if (DVA_GET_GANG(&dva[d])) {
1232			size = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
1233			DVA_SET_ASIZE(&blk.blk_dva[d], size);
1234			DVA_SET_GANG(&blk.blk_dva[d], 0);
1235		}
1236
1237		mutex_enter(&msp->ms_lock);
1238		if (space_map_contains(freemap, offset, size)) {
1239			mutex_exit(&msp->ms_lock);
1240			return (EAGAIN);	/* allocated more than once */
1241		}
1242
1243		if (!space_map_contains(allocmap, offset, size)) {
1244			mutex_exit(&msp->ms_lock);
1245			return (ESTALE);	/* not allocated at all */
1246		}
1247
1248		space_map_remove(allocmap, offset, size);
1249		space_map_add(freemap, offset, size);
1250
1251		mutex_exit(&msp->ms_lock);
1252	}
1253
1254	if (BP_IS_GANG(bp)) {
1255		zio_gbh_phys_t gbh;
1256		int g;
1257
1258		/* LINTED - compile time assert */
1259		ASSERT(sizeof (zio_gbh_phys_t) == SPA_GANGBLOCKSIZE);
1260
1261		BP_SET_CHECKSUM(&blk, ZIO_CHECKSUM_GANG_HEADER);
1262		BP_SET_PSIZE(&blk, SPA_GANGBLOCKSIZE);
1263		BP_SET_LSIZE(&blk, SPA_GANGBLOCKSIZE);
1264		BP_SET_COMPRESS(&blk, ZIO_COMPRESS_OFF);
1265		error = zio_wait(zio_read(NULL, spa, &blk, &gbh,
1266		    SPA_GANGBLOCKSIZE, NULL, NULL, ZIO_PRIORITY_SYNC_READ,
1267		    ZIO_FLAG_CANFAIL | ZIO_FLAG_CONFIG_HELD, zb));
1268		if (error)
1269			return (error);
1270		if (BP_SHOULD_BYTESWAP(&blk))
1271			byteswap_uint64_array(&gbh, SPA_GANGBLOCKSIZE);
1272		for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
1273			if (BP_IS_HOLE(&gbh.zg_blkptr[g]))
1274				break;
1275			error = zdb_space_map_claim(spa, &gbh.zg_blkptr[g], zb);
1276			if (error)
1277				return (error);
1278		}
1279	}
1280
1281	return (0);
1282}
1283
1284static void
1285zdb_leak(space_map_t *sm, uint64_t start, uint64_t size)
1286{
1287	metaslab_t *msp;
1288
1289	/* LINTED */
1290	msp = (metaslab_t *)((char *)sm - offsetof(metaslab_t, ms_allocmap[0]));
1291
1292	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
1293	    (u_longlong_t)msp->ms_group->mg_vd->vdev_id,
1294	    (u_longlong_t)start,
1295	    (u_longlong_t)size);
1296}
1297
1298static void
1299zdb_space_map_unload(spa_t *spa)
1300{
1301	vdev_t *rvd = spa->spa_root_vdev;
1302	vdev_t *vd;
1303	int c, m;
1304
1305	for (c = 0; c < rvd->vdev_children; c++) {
1306		vd = rvd->vdev_child[c];
1307		for (m = 0; m < vd->vdev_ms_count; m++) {
1308			metaslab_t *msp = vd->vdev_ms[m];
1309			mutex_enter(&msp->ms_lock);
1310			space_map_vacate(&msp->ms_allocmap[0], zdb_leak,
1311			    &msp->ms_allocmap[0]);
1312			space_map_unload(&msp->ms_allocmap[0]);
1313			space_map_vacate(&msp->ms_freemap[0], NULL, NULL);
1314			mutex_exit(&msp->ms_lock);
1315		}
1316	}
1317}
1318
1319static void
1320zdb_refresh_ubsync(spa_t *spa)
1321{
1322	uberblock_t ub = { 0 };
1323	vdev_t *rvd = spa->spa_root_vdev;
1324	zio_t *zio;
1325
1326	/*
1327	 * Reload the uberblock.
1328	 */
1329	zio = zio_root(spa, NULL, NULL,
1330	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1331	vdev_uberblock_load(zio, rvd, &ub);
1332	(void) zio_wait(zio);
1333
1334	if (ub.ub_txg != 0)
1335		spa->spa_ubsync = ub;
1336}
1337
1338/*
1339 * Verify that the sum of the sizes of all blocks in the pool adds up
1340 * to the SPA's sa_alloc total.
1341 */
1342typedef struct zdb_blkstats {
1343	uint64_t	zb_asize;
1344	uint64_t	zb_lsize;
1345	uint64_t	zb_psize;
1346	uint64_t	zb_count;
1347} zdb_blkstats_t;
1348
1349#define	DMU_OT_DEFERRED	DMU_OT_NONE
1350#define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
1351
1352#define	ZB_TOTAL	ZB_MAXLEVEL
1353
1354typedef struct zdb_cb {
1355	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][DMU_OT_TOTAL + 1];
1356	uint64_t	zcb_errors[256];
1357	traverse_blk_cache_t *zcb_cache;
1358	int		zcb_readfails;
1359	int		zcb_haderrors;
1360} zdb_cb_t;
1361
1362static void
1363zdb_count_block(spa_t *spa, zdb_cb_t *zcb, blkptr_t *bp, int type)
1364{
1365	int i, error;
1366
1367	for (i = 0; i < 4; i++) {
1368		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
1369		int t = (i & 1) ? type : DMU_OT_TOTAL;
1370		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
1371
1372		zb->zb_asize += BP_GET_ASIZE(bp);
1373		zb->zb_lsize += BP_GET_LSIZE(bp);
1374		zb->zb_psize += BP_GET_PSIZE(bp);
1375		zb->zb_count++;
1376	}
1377
1378	if (dump_opt['L'])
1379		return;
1380
1381	error = zdb_space_map_claim(spa, bp, &zcb->zcb_cache->bc_bookmark);
1382
1383	if (error == 0)
1384		return;
1385
1386	if (error == EAGAIN)
1387		(void) fatal("double-allocation, bp=%p", bp);
1388
1389	if (error == ESTALE)
1390		(void) fatal("reference to freed block, bp=%p", bp);
1391
1392	(void) fatal("fatal error %d in bp %p", error, bp);
1393}
1394
1395static int
1396zdb_blkptr_cb(traverse_blk_cache_t *bc, spa_t *spa, void *arg)
1397{
1398	zbookmark_t *zb = &bc->bc_bookmark;
1399	zdb_cb_t *zcb = arg;
1400	blkptr_t *bp = &bc->bc_blkptr;
1401	dmu_object_type_t type = BP_GET_TYPE(bp);
1402	char blkbuf[BP_SPRINTF_LEN];
1403	int error = 0;
1404
1405	if (bc->bc_errno) {
1406		if (zcb->zcb_readfails++ < 10 && dump_opt['L']) {
1407			zdb_refresh_ubsync(spa);
1408			error = EAGAIN;
1409		} else {
1410			zcb->zcb_haderrors = 1;
1411			zcb->zcb_errors[bc->bc_errno]++;
1412			error = ERESTART;
1413		}
1414
1415		if (dump_opt['b'] >= 3 || (dump_opt['b'] >= 2 && bc->bc_errno))
1416			sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1417		else
1418			blkbuf[0] = '\0';
1419
1420		(void) printf("zdb_blkptr_cb: Got error %d reading "
1421		    "<%llu, %llu, %lld, %llx> %s -- %s\n",
1422		    bc->bc_errno,
1423		    (u_longlong_t)zb->zb_objset,
1424		    (u_longlong_t)zb->zb_object,
1425		    (u_longlong_t)zb->zb_level,
1426		    (u_longlong_t)zb->zb_blkid,
1427		    blkbuf,
1428		    error == EAGAIN ? "retrying" : "skipping");
1429
1430		return (error);
1431	}
1432
1433	zcb->zcb_readfails = 0;
1434
1435	ASSERT(!BP_IS_HOLE(bp));
1436
1437	if (dump_opt['b'] >= 4) {
1438		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1439		(void) printf("objset %llu object %llu offset 0x%llx %s\n",
1440		    (u_longlong_t)zb->zb_objset,
1441		    (u_longlong_t)zb->zb_object,
1442		    (u_longlong_t)blkid2offset(bc->bc_dnode,
1443			zb->zb_level, zb->zb_blkid),
1444		    blkbuf);
1445	}
1446
1447	zdb_count_block(spa, zcb, bp, type);
1448
1449	return (0);
1450}
1451
1452static int
1453dump_block_stats(spa_t *spa)
1454{
1455	traverse_handle_t *th;
1456	zdb_cb_t zcb = { 0 };
1457	traverse_blk_cache_t dummy_cache = { 0 };
1458	zdb_blkstats_t *zb, *tzb;
1459	uint64_t alloc, space;
1460	int leaks = 0;
1461	int advance = zdb_advance;
1462	int flags;
1463	int e;
1464
1465	zcb.zcb_cache = &dummy_cache;
1466
1467	if (dump_opt['c'])
1468		advance |= ADVANCE_DATA;
1469
1470	advance |= ADVANCE_PRUNE | ADVANCE_ZIL;
1471
1472	(void) printf("\nTraversing all blocks to %sverify"
1473	    " nothing leaked ...\n",
1474	    dump_opt['c'] ? "verify checksums and " : "");
1475
1476	/*
1477	 * Load all space maps.  As we traverse the pool, if we find a block
1478	 * that's not in its space map, that indicates a double-allocation,
1479	 * reference to a freed block, or an unclaimed block.  Otherwise we
1480	 * remove the block from the space map.  If the space maps are not
1481	 * empty when we're done, that indicates leaked blocks.
1482	 */
1483	if (!dump_opt['L'])
1484		zdb_space_map_load(spa);
1485
1486	/*
1487	 * If there's a deferred-free bplist, process that first.
1488	 */
1489	if (spa->spa_sync_bplist_obj != 0) {
1490		bplist_t *bpl = &spa->spa_sync_bplist;
1491		blkptr_t blk;
1492		uint64_t itor = 0;
1493
1494		VERIFY(0 == bplist_open(bpl, spa->spa_meta_objset,
1495		    spa->spa_sync_bplist_obj));
1496
1497		while (bplist_iterate(bpl, &itor, &blk) == 0) {
1498			if (dump_opt['b'] >= 4) {
1499				char blkbuf[BP_SPRINTF_LEN];
1500				sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &blk);
1501				(void) printf("[%s] %s\n",
1502				    "deferred free", blkbuf);
1503			}
1504			zdb_count_block(spa, &zcb, &blk, DMU_OT_DEFERRED);
1505		}
1506
1507		bplist_close(bpl);
1508	}
1509
1510	/*
1511	 * Now traverse the pool.  If we're reading all data to verify
1512	 * checksums, do a scrubbing read so that we validate all copies.
1513	 */
1514	flags = ZIO_FLAG_CANFAIL;
1515	if (advance & ADVANCE_DATA)
1516		flags |= ZIO_FLAG_SCRUB;
1517	th = traverse_init(spa, zdb_blkptr_cb, &zcb, advance, flags);
1518	th->th_noread = zdb_noread;
1519
1520	traverse_add_pool(th, 0, spa_first_txg(spa) + TXG_CONCURRENT_STATES);
1521
1522	while (traverse_more(th) == EAGAIN)
1523		continue;
1524
1525	traverse_fini(th);
1526
1527	if (zcb.zcb_haderrors) {
1528		(void) printf("\nError counts:\n\n");
1529		(void) printf("\t%5s  %s\n", "errno", "count");
1530		for (e = 0; e < 256; e++) {
1531			if (zcb.zcb_errors[e] != 0) {
1532				(void) printf("\t%5d  %llu\n",
1533				    e, (u_longlong_t)zcb.zcb_errors[e]);
1534			}
1535		}
1536	}
1537
1538	/*
1539	 * Report any leaked segments.
1540	 */
1541	if (!dump_opt['L'])
1542		zdb_space_map_unload(spa);
1543
1544	if (dump_opt['L'])
1545		(void) printf("\n\n *** Live pool traversal; "
1546		    "block counts are only approximate ***\n\n");
1547
1548	alloc = spa_get_alloc(spa);
1549	space = spa_get_space(spa);
1550
1551	tzb = &zcb.zcb_type[ZB_TOTAL][DMU_OT_TOTAL];
1552
1553	if (tzb->zb_asize == alloc) {
1554		(void) printf("\n\tNo leaks (block sum matches space"
1555		    " maps exactly)\n");
1556	} else {
1557		(void) printf("block traversal size %llu != alloc %llu "
1558		    "(leaked %lld)\n",
1559		    (u_longlong_t)tzb->zb_asize,
1560		    (u_longlong_t)alloc,
1561		    (u_longlong_t)(alloc - tzb->zb_asize));
1562		leaks = 1;
1563	}
1564
1565	if (tzb->zb_count == 0)
1566		return (2);
1567
1568	(void) printf("\n");
1569	(void) printf("\tbp count:      %10llu\n",
1570	    (u_longlong_t)tzb->zb_count);
1571	(void) printf("\tbp logical:    %10llu\t avg: %6llu\n",
1572	    (u_longlong_t)tzb->zb_lsize,
1573	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
1574	(void) printf("\tbp physical:   %10llu\t avg:"
1575	    " %6llu\tcompression: %6.2f\n",
1576	    (u_longlong_t)tzb->zb_psize,
1577	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
1578	    (double)tzb->zb_lsize / tzb->zb_psize);
1579	(void) printf("\tbp allocated:  %10llu\t avg:"
1580	    " %6llu\tcompression: %6.2f\n",
1581	    (u_longlong_t)tzb->zb_asize,
1582	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
1583	    (double)tzb->zb_lsize / tzb->zb_asize);
1584	(void) printf("\tSPA allocated: %10llu\tused: %5.2f%%\n",
1585	    (u_longlong_t)alloc, 100.0 * alloc / space);
1586
1587	if (dump_opt['b'] >= 2) {
1588		int l, t, level;
1589		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
1590		    "\t  avg\t comp\t%%Total\tType\n");
1591
1592		for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
1593			char csize[6], lsize[6], psize[6], asize[6], avg[6];
1594			char *typename;
1595
1596			typename = t == DMU_OT_DEFERRED ? "deferred free" :
1597			    t == DMU_OT_TOTAL ? "Total" : dmu_ot[t].ot_name;
1598
1599			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
1600				(void) printf("%6s\t%5s\t%5s\t%5s"
1601				    "\t%5s\t%5s\t%6s\t%s\n",
1602				    "-",
1603				    "-",
1604				    "-",
1605				    "-",
1606				    "-",
1607				    "-",
1608				    "-",
1609				    typename);
1610				continue;
1611			}
1612
1613			for (l = ZB_TOTAL - 1; l >= -1; l--) {
1614				level = (l == -1 ? ZB_TOTAL : l);
1615				zb = &zcb.zcb_type[level][t];
1616
1617				if (zb->zb_asize == 0)
1618					continue;
1619
1620				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
1621					continue;
1622
1623				if (level == 0 && zb->zb_asize ==
1624				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
1625					continue;
1626
1627				nicenum(zb->zb_count, csize);
1628				nicenum(zb->zb_lsize, lsize);
1629				nicenum(zb->zb_psize, psize);
1630				nicenum(zb->zb_asize, asize);
1631				nicenum(zb->zb_asize / zb->zb_count, avg);
1632
1633				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
1634				    "\t%5.2f\t%6.2f\t",
1635				    csize, lsize, psize, asize, avg,
1636				    (double)zb->zb_lsize / zb->zb_psize,
1637				    100.0 * zb->zb_asize / tzb->zb_asize);
1638
1639				if (level == ZB_TOTAL)
1640					(void) printf("%s\n", typename);
1641				else
1642					(void) printf("    L%d %s\n",
1643					    level, typename);
1644			}
1645		}
1646	}
1647
1648	(void) printf("\n");
1649
1650	if (leaks)
1651		return (2);
1652
1653	if (zcb.zcb_haderrors)
1654		return (3);
1655
1656	return (0);
1657}
1658
1659static void
1660dump_zpool(spa_t *spa)
1661{
1662	dsl_pool_t *dp = spa_get_dsl(spa);
1663	int rc = 0;
1664
1665	if (dump_opt['u'])
1666		dump_uberblock(&spa->spa_uberblock);
1667
1668	if (dump_opt['d'] || dump_opt['i']) {
1669		dump_dir(dp->dp_meta_objset);
1670		if (dump_opt['d'] >= 3) {
1671			dump_bplist(dp->dp_meta_objset,
1672			    spa->spa_sync_bplist_obj, "Deferred frees");
1673			dump_dtl(spa->spa_root_vdev, 0);
1674			dump_metaslabs(spa);
1675		}
1676		(void) dmu_objset_find(spa->spa_name, dump_one_dir, NULL,
1677		    DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
1678	}
1679
1680	if (dump_opt['b'] || dump_opt['c'])
1681		rc = dump_block_stats(spa);
1682
1683	if (dump_opt['s'])
1684		show_pool_stats(spa);
1685
1686	if (rc != 0)
1687		exit(rc);
1688}
1689
1690#define	ZDB_FLAG_CHECKSUM	0x0001
1691#define	ZDB_FLAG_DECOMPRESS	0x0002
1692#define	ZDB_FLAG_BSWAP		0x0004
1693#define	ZDB_FLAG_GBH		0x0008
1694#define	ZDB_FLAG_INDIRECT	0x0010
1695#define	ZDB_FLAG_PHYS		0x0020
1696#define	ZDB_FLAG_RAW		0x0040
1697#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
1698
1699int flagbits[256];
1700
1701static void
1702zdb_print_blkptr(blkptr_t *bp, int flags)
1703{
1704	dva_t *dva = bp->blk_dva;
1705	int d;
1706
1707	if (flags & ZDB_FLAG_BSWAP)
1708		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
1709	/*
1710	 * Super-ick warning:  This code is also duplicated in
1711	 * cmd/mdb/common/modules/zfs/zfs.c .  Yeah, I hate code
1712	 * replication, too.
1713	 */
1714	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1715		(void) printf("\tDVA[%d]: vdev_id %lld / %llx\n", d,
1716		    (longlong_t)DVA_GET_VDEV(&dva[d]),
1717		    (longlong_t)DVA_GET_OFFSET(&dva[d]));
1718		(void) printf("\tDVA[%d]:       GANG: %-5s  GRID:  %04llx\t"
1719		    "ASIZE: %llx\n", d,
1720		    DVA_GET_GANG(&dva[d]) ? "TRUE" : "FALSE",
1721		    (longlong_t)DVA_GET_GRID(&dva[d]),
1722		    (longlong_t)DVA_GET_ASIZE(&dva[d]));
1723		(void) printf("\tDVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", d,
1724		    (u_longlong_t)DVA_GET_VDEV(&dva[d]),
1725		    (longlong_t)DVA_GET_OFFSET(&dva[d]),
1726		    (longlong_t)BP_GET_PSIZE(bp),
1727		    BP_SHOULD_BYTESWAP(bp) ? "e" : "",
1728		    !DVA_GET_GANG(&dva[d]) && BP_GET_LEVEL(bp) != 0 ?
1729		    "d" : "",
1730		    DVA_GET_GANG(&dva[d]) ? "g" : "",
1731		    BP_GET_COMPRESS(bp) != 0 ? "d" : "");
1732	}
1733	(void) printf("\tLSIZE:  %-16llx\t\tPSIZE: %llx\n",
1734	    (longlong_t)BP_GET_LSIZE(bp), (longlong_t)BP_GET_PSIZE(bp));
1735	(void) printf("\tENDIAN: %6s\t\t\t\t\tTYPE:  %s\n",
1736	    BP_GET_BYTEORDER(bp) ? "LITTLE" : "BIG",
1737	    dmu_ot[BP_GET_TYPE(bp)].ot_name);
1738	(void) printf("\tBIRTH:  %-16llx   LEVEL: %-2llu\tFILL:  %llx\n",
1739	    (u_longlong_t)bp->blk_birth, (u_longlong_t)BP_GET_LEVEL(bp),
1740	    (u_longlong_t)bp->blk_fill);
1741	(void) printf("\tCKFUNC: %-16s\t\tCOMP:  %s\n",
1742	    zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name,
1743	    zio_compress_table[BP_GET_COMPRESS(bp)].ci_name);
1744	(void) printf("\tCKSUM:  %llx:%llx:%llx:%llx\n",
1745	    (u_longlong_t)bp->blk_cksum.zc_word[0],
1746	    (u_longlong_t)bp->blk_cksum.zc_word[1],
1747	    (u_longlong_t)bp->blk_cksum.zc_word[2],
1748	    (u_longlong_t)bp->blk_cksum.zc_word[3]);
1749}
1750
1751static void
1752zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
1753{
1754	int i;
1755
1756	for (i = 0; i < nbps; i++)
1757		zdb_print_blkptr(&bp[i], flags);
1758}
1759
1760static void
1761zdb_dump_gbh(void *buf, int flags)
1762{
1763	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
1764}
1765
1766static void
1767zdb_dump_block_raw(void *buf, uint64_t size, int flags)
1768{
1769	if (flags & ZDB_FLAG_BSWAP)
1770		byteswap_uint64_array(buf, size);
1771	(void) write(2, buf, size);
1772}
1773
1774static void
1775zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
1776{
1777	uint64_t *d = (uint64_t *)buf;
1778	int nwords = size / sizeof (uint64_t);
1779	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
1780	int i, j;
1781	char *hdr, *c;
1782
1783
1784	if (do_bswap)
1785		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
1786	else
1787		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
1788
1789	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
1790
1791	for (i = 0; i < nwords; i += 2) {
1792		(void) printf("%06llx:  %016llx  %016llx  ",
1793		    (u_longlong_t)(i * sizeof (uint64_t)),
1794		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
1795		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
1796
1797		c = (char *)&d[i];
1798		for (j = 0; j < 2 * sizeof (uint64_t); j++)
1799			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
1800		(void) printf("\n");
1801	}
1802}
1803
1804/*
1805 * There are two acceptable formats:
1806 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
1807 *	child[.child]*    - For example: 0.1.1
1808 *
1809 * The second form can be used to specify arbitrary vdevs anywhere
1810 * in the heirarchy.  For example, in a pool with a mirror of
1811 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
1812 */
1813static vdev_t *
1814zdb_vdev_lookup(vdev_t *vdev, char *path)
1815{
1816	char *s, *p, *q;
1817	int i;
1818
1819	if (vdev == NULL)
1820		return (NULL);
1821
1822	/* First, assume the x.x.x.x format */
1823	i = (int)strtoul(path, &s, 10);
1824	if (s == path || (s && *s != '.' && *s != '\0'))
1825		goto name;
1826	if (i < 0 || i >= vdev->vdev_children)
1827		return (NULL);
1828
1829	vdev = vdev->vdev_child[i];
1830	if (*s == '\0')
1831		return (vdev);
1832	return (zdb_vdev_lookup(vdev, s+1));
1833
1834name:
1835	for (i = 0; i < vdev->vdev_children; i++) {
1836		vdev_t *vc = vdev->vdev_child[i];
1837
1838		if (vc->vdev_path == NULL) {
1839			vc = zdb_vdev_lookup(vc, path);
1840			if (vc == NULL)
1841				continue;
1842			else
1843				return (vc);
1844		}
1845
1846		p = strrchr(vc->vdev_path, '/');
1847		p = p ? p + 1 : vc->vdev_path;
1848		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
1849
1850		if (strcmp(vc->vdev_path, path) == 0)
1851			return (vc);
1852		if (strcmp(p, path) == 0)
1853			return (vc);
1854		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
1855			return (vc);
1856	}
1857
1858	return (NULL);
1859}
1860
1861/*
1862 * Read a block from a pool and print it out.  The syntax of the
1863 * block descriptor is:
1864 *
1865 *	pool:vdev_specifier:offset:size[:flags]
1866 *
1867 *	pool           - The name of the pool you wish to read from
1868 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
1869 *	offset         - offset, in hex, in bytes
1870 *	size           - Amount of data to read, in hex, in bytes
1871 *	flags          - A string of characters specifying options
1872 *		 b: Decode a blkptr at given offset within block
1873 *		*c: Calculate and display checksums
1874 *		*d: Decompress data before dumping
1875 *		 e: Byteswap data before dumping
1876 *		*g: Display data as a gang block header
1877 *		*i: Display as an indirect block
1878 *		 p: Do I/O to physical offset
1879 *		 r: Dump raw data to stdout
1880 *
1881 *              * = not yet implemented
1882 */
1883static void
1884zdb_read_block(char *thing, spa_t **spap)
1885{
1886	spa_t *spa = *spap;
1887	int flags = 0;
1888	uint64_t offset = 0, size = 0, blkptr_offset = 0;
1889	zio_t *zio;
1890	vdev_t *vd;
1891	void *buf;
1892	char *s, *p, *dup, *spa_name, *vdev, *flagstr;
1893	int i, error, zio_flags;
1894
1895	dup = strdup(thing);
1896	s = strtok(dup, ":");
1897	spa_name = s ? s : "";
1898	s = strtok(NULL, ":");
1899	vdev = s ? s : "";
1900	s = strtok(NULL, ":");
1901	offset = strtoull(s ? s : "", NULL, 16);
1902	s = strtok(NULL, ":");
1903	size = strtoull(s ? s : "", NULL, 16);
1904	s = strtok(NULL, ":");
1905	flagstr = s ? s : "";
1906
1907	s = NULL;
1908	if (size == 0)
1909		s = "size must not be zero";
1910	if (!IS_P2ALIGNED(size, DEV_BSIZE))
1911		s = "size must be a multiple of sector size";
1912	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
1913		s = "offset must be a multiple of sector size";
1914	if (s) {
1915		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
1916		free(dup);
1917		return;
1918	}
1919
1920	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
1921		for (i = 0; flagstr[i]; i++) {
1922			int bit = flagbits[(uchar_t)flagstr[i]];
1923
1924			if (bit == 0) {
1925				(void) printf("***Invalid flag: %c\n",
1926				    flagstr[i]);
1927				continue;
1928			}
1929			flags |= bit;
1930
1931			/* If it's not something with an argument, keep going */
1932			if ((bit & (ZDB_FLAG_CHECKSUM | ZDB_FLAG_DECOMPRESS |
1933			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
1934				continue;
1935
1936			p = &flagstr[i + 1];
1937			if (bit == ZDB_FLAG_PRINT_BLKPTR)
1938				blkptr_offset = strtoull(p, &p, 16);
1939			if (*p != ':' && *p != '\0') {
1940				(void) printf("***Invalid flag arg: '%s'\n", s);
1941				free(dup);
1942				return;
1943			}
1944		}
1945	}
1946
1947	if (spa == NULL || spa->spa_name == NULL ||
1948	    strcmp(spa->spa_name, spa_name)) {
1949		if (spa && spa->spa_name)
1950			spa_close(spa, (void *)zdb_read_block);
1951		error = spa_open(spa_name, spap, (void *)zdb_read_block);
1952		if (error)
1953			fatal("Failed to open pool '%s': errno = %d\n",
1954			    spa_name, error);
1955		spa = *spap;
1956	}
1957
1958	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
1959	if (vd == NULL) {
1960		(void) printf("***Invalid vdev: %s\n", vdev);
1961		free(dup);
1962		return;
1963	} else {
1964		if (vd->vdev_path)
1965			(void) printf("Found vdev: %s\n", vd->vdev_path);
1966		else
1967			(void) printf("Found vdev type: %s\n",
1968			    vd->vdev_ops->vdev_op_type);
1969	}
1970
1971	buf = umem_alloc(size, UMEM_NOFAIL);
1972
1973	zio_flags = ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
1974	    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_NOBOOKMARK;
1975
1976	if (flags & ZDB_FLAG_PHYS)
1977		zio_flags |= ZIO_FLAG_PHYSICAL;
1978
1979	zio = zio_root(spa, NULL, NULL, 0);
1980	/* XXX todo - cons up a BP so RAID-Z will be happy */
1981	zio_nowait(zio_vdev_child_io(zio, NULL, vd, offset, buf, size,
1982	    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ, zio_flags, NULL, NULL));
1983	error = zio_wait(zio);
1984
1985	if (error) {
1986		(void) printf("Read of %s failed, error: %d\n", thing, error);
1987		goto out;
1988	}
1989
1990	if (flags & ZDB_FLAG_PRINT_BLKPTR)
1991		zdb_print_blkptr((blkptr_t *)(void *)
1992		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
1993	else if (flags & ZDB_FLAG_RAW)
1994		zdb_dump_block_raw(buf, size, flags);
1995	else if (flags & ZDB_FLAG_INDIRECT)
1996		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
1997		    flags);
1998	else if (flags & ZDB_FLAG_GBH)
1999		zdb_dump_gbh(buf, flags);
2000	else
2001		zdb_dump_block(thing, buf, size, flags);
2002
2003out:
2004	umem_free(buf, size);
2005	free(dup);
2006}
2007
2008int
2009main(int argc, char **argv)
2010{
2011	int i, c;
2012	struct rlimit rl = { 1024, 1024 };
2013	spa_t *spa;
2014	objset_t *os = NULL;
2015	char *endstr;
2016	int dump_all = 1;
2017	int verbose = 0;
2018	int error;
2019	int flag, set;
2020
2021	(void) setrlimit(RLIMIT_NOFILE, &rl);
2022	(void) enable_extended_FILE_stdio(-1, -1);
2023
2024	dprintf_setup(&argc, argv);
2025
2026	while ((c = getopt(argc, argv, "udibcsvCLO:B:UlR")) != -1) {
2027		switch (c) {
2028		case 'u':
2029		case 'd':
2030		case 'i':
2031		case 'b':
2032		case 'c':
2033		case 's':
2034		case 'C':
2035		case 'l':
2036		case 'R':
2037			dump_opt[c]++;
2038			dump_all = 0;
2039			break;
2040		case 'L':
2041			dump_opt[c]++;
2042			break;
2043		case 'O':
2044			endstr = optarg;
2045			if (endstr[0] == '!') {
2046				endstr++;
2047				set = 0;
2048			} else {
2049				set = 1;
2050			}
2051			if (strcmp(endstr, "post") == 0) {
2052				flag = ADVANCE_PRE;
2053				set = !set;
2054			} else if (strcmp(endstr, "pre") == 0) {
2055				flag = ADVANCE_PRE;
2056			} else if (strcmp(endstr, "prune") == 0) {
2057				flag = ADVANCE_PRUNE;
2058			} else if (strcmp(endstr, "data") == 0) {
2059				flag = ADVANCE_DATA;
2060			} else if (strcmp(endstr, "holes") == 0) {
2061				flag = ADVANCE_HOLES;
2062			} else {
2063				usage();
2064			}
2065			if (set)
2066				zdb_advance |= flag;
2067			else
2068				zdb_advance &= ~flag;
2069			break;
2070		case 'B':
2071			endstr = optarg - 1;
2072			zdb_noread.zb_objset = strtoull(endstr + 1, &endstr, 0);
2073			zdb_noread.zb_object = strtoull(endstr + 1, &endstr, 0);
2074			zdb_noread.zb_level = strtol(endstr + 1, &endstr, 0);
2075			zdb_noread.zb_blkid = strtoull(endstr + 1, &endstr, 16);
2076			(void) printf("simulating bad block "
2077			    "<%llu, %llu, %lld, %llx>\n",
2078			    (u_longlong_t)zdb_noread.zb_objset,
2079			    (u_longlong_t)zdb_noread.zb_object,
2080			    (u_longlong_t)zdb_noread.zb_level,
2081			    (u_longlong_t)zdb_noread.zb_blkid);
2082			break;
2083		case 'v':
2084			verbose++;
2085			break;
2086		case 'U':
2087			spa_config_dir = "/tmp";
2088			break;
2089		default:
2090			usage();
2091			break;
2092		}
2093	}
2094
2095	kernel_init(FREAD);
2096
2097	/*
2098	 * Disable vdev caching.  If we don't do this, live pool traversal
2099	 * won't make progress because it will never see disk updates.
2100	 */
2101	zfs_vdev_cache_size = 0;
2102
2103	for (c = 0; c < 256; c++) {
2104		if (dump_all && c != 'L' && c != 'l' && c != 'R')
2105			dump_opt[c] = 1;
2106		if (dump_opt[c])
2107			dump_opt[c] += verbose;
2108	}
2109
2110	argc -= optind;
2111	argv += optind;
2112
2113	if (argc < 1) {
2114		if (dump_opt['C']) {
2115			dump_config(NULL);
2116			return (0);
2117		}
2118		usage();
2119	}
2120
2121	if (dump_opt['l']) {
2122		dump_label(argv[0]);
2123		return (0);
2124	}
2125
2126	if (dump_opt['R']) {
2127		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
2128		flagbits['c'] = ZDB_FLAG_CHECKSUM;
2129		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
2130		flagbits['e'] = ZDB_FLAG_BSWAP;
2131		flagbits['g'] = ZDB_FLAG_GBH;
2132		flagbits['i'] = ZDB_FLAG_INDIRECT;
2133		flagbits['p'] = ZDB_FLAG_PHYS;
2134		flagbits['r'] = ZDB_FLAG_RAW;
2135
2136		spa = NULL;
2137		while (argv[0]) {
2138			zdb_read_block(argv[0], &spa);
2139			argv++;
2140			argc--;
2141		}
2142		if (spa)
2143			spa_close(spa, (void *)zdb_read_block);
2144		return (0);
2145	}
2146
2147	if (dump_opt['C'])
2148		dump_config(argv[0]);
2149
2150	if (strchr(argv[0], '/') != NULL) {
2151		error = dmu_objset_open(argv[0], DMU_OST_ANY,
2152		    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
2153	} else {
2154		error = spa_open(argv[0], &spa, FTAG);
2155	}
2156
2157	if (error)
2158		fatal("can't open %s: error %d", argv[0], error);
2159
2160	argv++;
2161	if (--argc > 0) {
2162		zopt_objects = argc;
2163		zopt_object = calloc(zopt_objects, sizeof (uint64_t));
2164		for (i = 0; i < zopt_objects; i++) {
2165			errno = 0;
2166			zopt_object[i] = strtoull(argv[i], NULL, 0);
2167			if (zopt_object[i] == 0 && errno != 0)
2168				fatal("bad object number %s: %s",
2169				    argv[i], strerror(errno));
2170		}
2171	}
2172
2173	if (os != NULL) {
2174		dump_dir(os);
2175		dmu_objset_close(os);
2176	} else {
2177		dump_zpool(spa);
2178		spa_close(spa, FTAG);
2179	}
2180
2181	kernel_fini();
2182
2183	return (0);
2184}
2185