zdb.c revision 004388ebfdfe2ed7dfd2d153a876dfcc22d2c006
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI"
27
28#include <stdio.h>
29#include <stdio_ext.h>
30#include <stdlib.h>
31#include <ctype.h>
32#include <sys/zfs_context.h>
33#include <sys/spa.h>
34#include <sys/spa_impl.h>
35#include <sys/dmu.h>
36#include <sys/zap.h>
37#include <sys/fs/zfs.h>
38#include <sys/zfs_znode.h>
39#include <sys/vdev.h>
40#include <sys/vdev_impl.h>
41#include <sys/metaslab_impl.h>
42#include <sys/dmu_objset.h>
43#include <sys/dsl_dir.h>
44#include <sys/dsl_dataset.h>
45#include <sys/dsl_pool.h>
46#include <sys/dbuf.h>
47#include <sys/zil.h>
48#include <sys/zil_impl.h>
49#include <sys/stat.h>
50#include <sys/resource.h>
51#include <sys/dmu_traverse.h>
52#include <sys/zio_checksum.h>
53#include <sys/zio_compress.h>
54
55const char cmdname[] = "zdb";
56uint8_t dump_opt[256];
57
58typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
59
60extern void dump_intent_log(zilog_t *);
61uint64_t *zopt_object = NULL;
62int zopt_objects = 0;
63int zdb_advance = ADVANCE_PRE;
64zbookmark_t zdb_noread = { 0, 0, ZB_NO_LEVEL, 0 };
65
66/*
67 * These libumem hooks provide a reasonable set of defaults for the allocator's
68 * debugging facilities.
69 */
70const char *
71_umem_debug_init()
72{
73	return ("default,verbose"); /* $UMEM_DEBUG setting */
74}
75
76const char *
77_umem_logging_init(void)
78{
79	return ("fail,contents"); /* $UMEM_LOGGING setting */
80}
81
82static void
83usage(void)
84{
85	(void) fprintf(stderr,
86	    "Usage: %s [-udibcsvLU] [-O order] [-B os:obj:level:blkid] "
87	    "dataset [object...]\n"
88	    "       %s -C [pool]\n"
89	    "       %s -l dev\n"
90	    "       %s -R vdev:offset:size:flags\n",
91	    cmdname, cmdname, cmdname, cmdname);
92
93	(void) fprintf(stderr, "	-u uberblock\n");
94	(void) fprintf(stderr, "	-d datasets\n");
95	(void) fprintf(stderr, "        -C cached pool configuration\n");
96	(void) fprintf(stderr, "	-i intent logs\n");
97	(void) fprintf(stderr, "	-b block statistics\n");
98	(void) fprintf(stderr, "	-c checksum all data blocks\n");
99	(void) fprintf(stderr, "	-s report stats on zdb's I/O\n");
100	(void) fprintf(stderr, "	-v verbose (applies to all others)\n");
101	(void) fprintf(stderr, "        -l dump label contents\n");
102	(void) fprintf(stderr, "	-L live pool (allows some errors)\n");
103	(void) fprintf(stderr, "	-O [!]<pre|post|prune|data|holes> "
104	    "visitation order\n");
105	(void) fprintf(stderr, "	-U use zpool.cache in /tmp\n");
106	(void) fprintf(stderr, "	-B objset:object:level:blkid -- "
107	    "simulate bad block\n");
108	(void) fprintf(stderr, "        -R read and display block from a"
109	    "device\n");
110	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
111	    "to make only that option verbose\n");
112	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
113	exit(1);
114}
115
116static void
117fatal(const char *fmt, ...)
118{
119	va_list ap;
120
121	va_start(ap, fmt);
122	(void) fprintf(stderr, "%s: ", cmdname);
123	(void) vfprintf(stderr, fmt, ap);
124	va_end(ap);
125	(void) fprintf(stderr, "\n");
126
127	exit(1);
128}
129
130static void
131dump_nvlist(nvlist_t *list, int indent)
132{
133	nvpair_t *elem = NULL;
134
135	while ((elem = nvlist_next_nvpair(list, elem)) != NULL) {
136		switch (nvpair_type(elem)) {
137		case DATA_TYPE_STRING:
138			{
139				char *value;
140
141				VERIFY(nvpair_value_string(elem, &value) == 0);
142				(void) printf("%*s%s='%s'\n", indent, "",
143				    nvpair_name(elem), value);
144			}
145			break;
146
147		case DATA_TYPE_UINT64:
148			{
149				uint64_t value;
150
151				VERIFY(nvpair_value_uint64(elem, &value) == 0);
152				(void) printf("%*s%s=%llu\n", indent, "",
153				    nvpair_name(elem), (u_longlong_t)value);
154			}
155			break;
156
157		case DATA_TYPE_NVLIST:
158			{
159				nvlist_t *value;
160
161				VERIFY(nvpair_value_nvlist(elem, &value) == 0);
162				(void) printf("%*s%s\n", indent, "",
163				    nvpair_name(elem));
164				dump_nvlist(value, indent + 4);
165			}
166			break;
167
168		case DATA_TYPE_NVLIST_ARRAY:
169			{
170				nvlist_t **value;
171				uint_t c, count;
172
173				VERIFY(nvpair_value_nvlist_array(elem, &value,
174				    &count) == 0);
175
176				for (c = 0; c < count; c++) {
177					(void) printf("%*s%s[%u]\n", indent, "",
178					    nvpair_name(elem), c);
179					dump_nvlist(value[c], indent + 8);
180				}
181			}
182			break;
183
184		default:
185
186			(void) printf("bad config type %d for %s\n",
187			    nvpair_type(elem), nvpair_name(elem));
188		}
189	}
190}
191
192/* ARGSUSED */
193static void
194dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
195{
196	nvlist_t *nv;
197	size_t nvsize = *(uint64_t *)data;
198	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
199
200	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed));
201
202	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
203
204	umem_free(packed, nvsize);
205
206	dump_nvlist(nv, 8);
207
208	nvlist_free(nv);
209}
210
211const char dump_zap_stars[] = "****************************************";
212const int dump_zap_width = sizeof (dump_zap_stars) - 1;
213
214static void
215dump_zap_histogram(uint64_t histo[ZAP_HISTOGRAM_SIZE])
216{
217	int i;
218	int minidx = ZAP_HISTOGRAM_SIZE - 1;
219	int maxidx = 0;
220	uint64_t max = 0;
221
222	for (i = 0; i < ZAP_HISTOGRAM_SIZE; i++) {
223		if (histo[i] > max)
224			max = histo[i];
225		if (histo[i] > 0 && i > maxidx)
226			maxidx = i;
227		if (histo[i] > 0 && i < minidx)
228			minidx = i;
229	}
230
231	if (max < dump_zap_width)
232		max = dump_zap_width;
233
234	for (i = minidx; i <= maxidx; i++)
235		(void) printf("\t\t\t%u: %6llu %s\n", i, (u_longlong_t)histo[i],
236		    &dump_zap_stars[(max - histo[i]) * dump_zap_width / max]);
237}
238
239static void
240dump_zap_stats(objset_t *os, uint64_t object)
241{
242	int error;
243	zap_stats_t zs;
244
245	error = zap_get_stats(os, object, &zs);
246	if (error)
247		return;
248
249	if (zs.zs_ptrtbl_len == 0) {
250		ASSERT(zs.zs_num_blocks == 1);
251		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
252		    (u_longlong_t)zs.zs_blocksize,
253		    (u_longlong_t)zs.zs_num_entries);
254		return;
255	}
256
257	(void) printf("\tFat ZAP stats:\n");
258
259	(void) printf("\t\tPointer table:\n");
260	(void) printf("\t\t\t%llu elements\n",
261	    (u_longlong_t)zs.zs_ptrtbl_len);
262	(void) printf("\t\t\tzt_blk: %llu\n",
263	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
264	(void) printf("\t\t\tzt_numblks: %llu\n",
265	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
266	(void) printf("\t\t\tzt_shift: %llu\n",
267	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
268	(void) printf("\t\t\tzt_blks_copied: %llu\n",
269	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
270	(void) printf("\t\t\tzt_nextblk: %llu\n",
271	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
272
273	(void) printf("\t\tZAP entries: %llu\n",
274	    (u_longlong_t)zs.zs_num_entries);
275	(void) printf("\t\tLeaf blocks: %llu\n",
276	    (u_longlong_t)zs.zs_num_leafs);
277	(void) printf("\t\tTotal blocks: %llu\n",
278	    (u_longlong_t)zs.zs_num_blocks);
279	(void) printf("\t\tzap_block_type: 0x%llx\n",
280	    (u_longlong_t)zs.zs_block_type);
281	(void) printf("\t\tzap_magic: 0x%llx\n",
282	    (u_longlong_t)zs.zs_magic);
283	(void) printf("\t\tzap_salt: 0x%llx\n",
284	    (u_longlong_t)zs.zs_salt);
285
286	(void) printf("\t\tLeafs with 2^n pointers:\n");
287	dump_zap_histogram(zs.zs_leafs_with_2n_pointers);
288
289	(void) printf("\t\tBlocks with n*5 entries:\n");
290	dump_zap_histogram(zs.zs_blocks_with_n5_entries);
291
292	(void) printf("\t\tBlocks n/10 full:\n");
293	dump_zap_histogram(zs.zs_blocks_n_tenths_full);
294
295	(void) printf("\t\tEntries with n chunks:\n");
296	dump_zap_histogram(zs.zs_entries_using_n_chunks);
297
298	(void) printf("\t\tBuckets with n entries:\n");
299	dump_zap_histogram(zs.zs_buckets_with_n_entries);
300}
301
302/*ARGSUSED*/
303static void
304dump_none(objset_t *os, uint64_t object, void *data, size_t size)
305{
306}
307
308/*ARGSUSED*/
309void
310dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
311{
312}
313
314/*ARGSUSED*/
315static void
316dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
317{
318}
319
320/*ARGSUSED*/
321static void
322dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
323{
324	zap_cursor_t zc;
325	zap_attribute_t attr;
326	void *prop;
327	int i;
328
329	dump_zap_stats(os, object);
330	(void) printf("\n");
331
332	for (zap_cursor_init(&zc, os, object);
333	    zap_cursor_retrieve(&zc, &attr) == 0;
334	    zap_cursor_advance(&zc)) {
335		(void) printf("\t\t%s = ", attr.za_name);
336		if (attr.za_num_integers == 0) {
337			(void) printf("\n");
338			continue;
339		}
340		prop = umem_zalloc(attr.za_num_integers *
341		    attr.za_integer_length, UMEM_NOFAIL);
342		(void) zap_lookup(os, object, attr.za_name,
343		    attr.za_integer_length, attr.za_num_integers, prop);
344		if (attr.za_integer_length == 1) {
345			(void) printf("%s", (char *)prop);
346		} else {
347			for (i = 0; i < attr.za_num_integers; i++) {
348				switch (attr.za_integer_length) {
349				case 2:
350					(void) printf("%u ",
351					    ((uint16_t *)prop)[i]);
352					break;
353				case 4:
354					(void) printf("%u ",
355					    ((uint32_t *)prop)[i]);
356					break;
357				case 8:
358					(void) printf("%lld ",
359					    (u_longlong_t)((int64_t *)prop)[i]);
360					break;
361				}
362			}
363		}
364		(void) printf("\n");
365		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
366	}
367	zap_cursor_fini(&zc);
368}
369
370static void
371dump_spacemap(objset_t *os, space_map_obj_t *smo, space_map_t *sm)
372{
373	uint64_t alloc, offset, entry;
374	uint8_t mapshift = sm->sm_shift;
375	uint64_t mapstart = sm->sm_start;
376	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID" };
377
378	if (smo->smo_object == 0)
379		return;
380
381	/*
382	 * Print out the freelist entries in both encoded and decoded form.
383	 */
384	alloc = 0;
385	for (offset = 0; offset < smo->smo_objsize; offset += sizeof (entry)) {
386		VERIFY(0 == dmu_read(os, smo->smo_object, offset,
387		    sizeof (entry), &entry));
388		if (SM_DEBUG_DECODE(entry)) {
389			(void) printf("\t\t[%4llu] %s: txg %llu, pass %llu\n",
390			    (u_longlong_t)(offset / sizeof (entry)),
391			    ddata[SM_DEBUG_ACTION_DECODE(entry)],
392			    SM_DEBUG_TXG_DECODE(entry),
393			    SM_DEBUG_SYNCPASS_DECODE(entry));
394		} else {
395			(void) printf("\t\t[%4llu]    %c  range:"
396			    " %08llx-%08llx  size: %06llx\n",
397			    (u_longlong_t)(offset / sizeof (entry)),
398			    SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
399			    (SM_OFFSET_DECODE(entry) << mapshift) + mapstart,
400			    (SM_OFFSET_DECODE(entry) << mapshift) + mapstart +
401			    (SM_RUN_DECODE(entry) << mapshift),
402			    (SM_RUN_DECODE(entry) << mapshift));
403			if (SM_TYPE_DECODE(entry) == SM_ALLOC)
404				alloc += SM_RUN_DECODE(entry) << mapshift;
405			else
406				alloc -= SM_RUN_DECODE(entry) << mapshift;
407		}
408	}
409	if (alloc != smo->smo_alloc) {
410		(void) printf("space_map_object alloc (%llu) INCONSISTENT "
411		    "with space map summary (%llu)\n",
412		    (u_longlong_t)smo->smo_alloc, (u_longlong_t)alloc);
413	}
414}
415
416static void
417dump_metaslab(metaslab_t *msp)
418{
419	char freebuf[5];
420	space_map_obj_t *smo = &msp->ms_smo;
421	vdev_t *vd = msp->ms_group->mg_vd;
422	spa_t *spa = vd->vdev_spa;
423
424	nicenum(msp->ms_map.sm_size - smo->smo_alloc, freebuf);
425
426	if (dump_opt['d'] <= 5) {
427		(void) printf("\t%10llx   %10llu   %5s\n",
428		    (u_longlong_t)msp->ms_map.sm_start,
429		    (u_longlong_t)smo->smo_object,
430		    freebuf);
431		return;
432	}
433
434	(void) printf(
435	    "\tvdev %llu   offset %08llx   spacemap %4llu   free %5s\n",
436	    (u_longlong_t)vd->vdev_id, (u_longlong_t)msp->ms_map.sm_start,
437	    (u_longlong_t)smo->smo_object, freebuf);
438
439	ASSERT(msp->ms_map.sm_size == (1ULL << vd->vdev_ms_shift));
440
441	dump_spacemap(spa->spa_meta_objset, smo, &msp->ms_map);
442}
443
444static void
445dump_metaslabs(spa_t *spa)
446{
447	vdev_t *rvd = spa->spa_root_vdev;
448	vdev_t *vd;
449	int c, m;
450
451	(void) printf("\nMetaslabs:\n");
452
453	for (c = 0; c < rvd->vdev_children; c++) {
454		vd = rvd->vdev_child[c];
455
456		spa_config_enter(spa, RW_READER, FTAG);
457		(void) printf("\n    vdev %llu = %s\n\n",
458		    (u_longlong_t)vd->vdev_id, vdev_description(vd));
459		spa_config_exit(spa, FTAG);
460
461		if (dump_opt['d'] <= 5) {
462			(void) printf("\t%10s   %10s   %5s\n",
463			    "offset", "spacemap", "free");
464			(void) printf("\t%10s   %10s   %5s\n",
465			    "------", "--------", "----");
466		}
467		for (m = 0; m < vd->vdev_ms_count; m++)
468			dump_metaslab(vd->vdev_ms[m]);
469		(void) printf("\n");
470	}
471}
472
473static void
474dump_dtl(vdev_t *vd, int indent)
475{
476	avl_tree_t *t = &vd->vdev_dtl_map.sm_root;
477	spa_t *spa = vd->vdev_spa;
478	space_seg_t *ss;
479	vdev_t *pvd;
480	int c;
481
482	if (indent == 0)
483		(void) printf("\nDirty time logs:\n\n");
484
485	spa_config_enter(spa, RW_READER, FTAG);
486	(void) printf("\t%*s%s\n", indent, "", vdev_description(vd));
487	spa_config_exit(spa, FTAG);
488
489	for (ss = avl_first(t); ss; ss = AVL_NEXT(t, ss)) {
490		/*
491		 * Everything in this DTL must appear in all parent DTL unions.
492		 */
493		for (pvd = vd; pvd; pvd = pvd->vdev_parent)
494			ASSERT(vdev_dtl_contains(&pvd->vdev_dtl_map,
495			    ss->ss_start, ss->ss_end - ss->ss_start));
496		(void) printf("\t%*soutage [%llu,%llu] length %llu\n",
497		    indent, "",
498		    (u_longlong_t)ss->ss_start,
499		    (u_longlong_t)ss->ss_end - 1,
500		    (u_longlong_t)ss->ss_end - ss->ss_start);
501	}
502
503	(void) printf("\n");
504
505	if (dump_opt['d'] > 5 && vd->vdev_children == 0) {
506		dump_spacemap(vd->vdev_spa->spa_meta_objset, &vd->vdev_dtl,
507		    &vd->vdev_dtl_map);
508		(void) printf("\n");
509	}
510
511	for (c = 0; c < vd->vdev_children; c++)
512		dump_dtl(vd->vdev_child[c], indent + 4);
513}
514
515/*ARGSUSED*/
516static void
517dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
518{
519}
520
521static uint64_t
522blkid2offset(dnode_phys_t *dnp, int level, uint64_t blkid)
523{
524	if (level < 0)
525		return (blkid);
526
527	return ((blkid << (level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
528	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
529}
530
531static void
532sprintf_blkptr_compact(char *blkbuf, blkptr_t *bp, int alldvas)
533{
534	dva_t *dva = bp->blk_dva;
535	int ndvas = alldvas ? BP_GET_NDVAS(bp) : 1;
536	int i;
537
538	blkbuf[0] = '\0';
539
540	for (i = 0; i < ndvas; i++)
541		(void) sprintf(blkbuf + strlen(blkbuf), "%llu:%llx:%llx ",
542		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
543		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
544		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
545
546	(void) sprintf(blkbuf + strlen(blkbuf), "%llxL/%llxP F=%llu B=%llu",
547	    (u_longlong_t)BP_GET_LSIZE(bp),
548	    (u_longlong_t)BP_GET_PSIZE(bp),
549	    (u_longlong_t)bp->blk_fill,
550	    (u_longlong_t)bp->blk_birth);
551}
552
553/* ARGSUSED */
554static int
555zdb_indirect_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a)
556{
557	zbookmark_t *zb = &bc->bc_bookmark;
558	blkptr_t *bp = &bc->bc_blkptr;
559	void *data = bc->bc_data;
560	dnode_phys_t *dnp = bc->bc_dnode;
561	char blkbuf[BP_SPRINTF_LEN + 80];
562	int l;
563
564	if (bc->bc_errno) {
565		(void) sprintf(blkbuf,
566		    "Error %d reading <%llu, %llu, %lld, %llu>: ",
567		    bc->bc_errno,
568		    (u_longlong_t)zb->zb_objset,
569		    (u_longlong_t)zb->zb_object,
570		    (u_longlong_t)zb->zb_level,
571		    (u_longlong_t)zb->zb_blkid);
572		goto out;
573	}
574
575	if (zb->zb_level == -1) {
576		ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
577		ASSERT3U(BP_GET_LEVEL(bp), ==, 0);
578	} else {
579		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
580		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
581	}
582
583	if (zb->zb_level > 0) {
584		uint64_t fill = 0;
585		blkptr_t *bpx, *bpend;
586
587		for (bpx = data, bpend = bpx + BP_GET_LSIZE(bp) / sizeof (*bpx);
588		    bpx < bpend; bpx++) {
589			if (bpx->blk_birth != 0) {
590				fill += bpx->blk_fill;
591			} else {
592				ASSERT(bpx->blk_fill == 0);
593			}
594		}
595		ASSERT3U(fill, ==, bp->blk_fill);
596	}
597
598	if (zb->zb_level == 0 && dnp->dn_type == DMU_OT_DNODE) {
599		uint64_t fill = 0;
600		dnode_phys_t *dnx, *dnend;
601
602		for (dnx = data, dnend = dnx + (BP_GET_LSIZE(bp)>>DNODE_SHIFT);
603		    dnx < dnend; dnx++) {
604			if (dnx->dn_type != DMU_OT_NONE)
605				fill++;
606		}
607		ASSERT3U(fill, ==, bp->blk_fill);
608	}
609
610	(void) sprintf(blkbuf, "%16llx ",
611	    (u_longlong_t)blkid2offset(dnp, zb->zb_level, zb->zb_blkid));
612
613	ASSERT(zb->zb_level >= 0);
614
615	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
616		if (l == zb->zb_level) {
617			(void) sprintf(blkbuf + strlen(blkbuf), "L%llx",
618			    (u_longlong_t)zb->zb_level);
619		} else {
620			(void) sprintf(blkbuf + strlen(blkbuf), " ");
621		}
622	}
623
624out:
625	if (bp->blk_birth == 0) {
626		(void) sprintf(blkbuf + strlen(blkbuf), "<hole>");
627		(void) printf("%s\n", blkbuf);
628	} else {
629		sprintf_blkptr_compact(blkbuf + strlen(blkbuf), bp,
630		    dump_opt['d'] > 5 ? 1 : 0);
631		(void) printf("%s\n", blkbuf);
632	}
633
634	return (bc->bc_errno ? ERESTART : 0);
635}
636
637/*ARGSUSED*/
638static void
639dump_indirect(objset_t *os, uint64_t object, void *data, size_t size)
640{
641	traverse_handle_t *th;
642	uint64_t objset = dmu_objset_id(os);
643	int advance = zdb_advance;
644
645	(void) printf("Indirect blocks:\n");
646
647	if (object == 0)
648		advance |= ADVANCE_DATA;
649
650	th = traverse_init(dmu_objset_spa(os), zdb_indirect_cb, NULL, advance,
651	    ZIO_FLAG_CANFAIL);
652	th->th_noread = zdb_noread;
653
654	traverse_add_dnode(th, 0, -1ULL, objset, object);
655
656	while (traverse_more(th) == EAGAIN)
657		continue;
658
659	(void) printf("\n");
660
661	traverse_fini(th);
662}
663
664/*ARGSUSED*/
665static void
666dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
667{
668	dsl_dir_phys_t *dd = data;
669	time_t crtime;
670	char used[6], compressed[6], uncompressed[6], quota[6], resv[6];
671
672	if (dd == NULL)
673		return;
674
675	ASSERT(size == sizeof (*dd));
676
677	crtime = dd->dd_creation_time;
678	nicenum(dd->dd_used_bytes, used);
679	nicenum(dd->dd_compressed_bytes, compressed);
680	nicenum(dd->dd_uncompressed_bytes, uncompressed);
681	nicenum(dd->dd_quota, quota);
682	nicenum(dd->dd_reserved, resv);
683
684	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
685	(void) printf("\t\thead_dataset_obj = %llu\n",
686	    (u_longlong_t)dd->dd_head_dataset_obj);
687	(void) printf("\t\tparent_dir_obj = %llu\n",
688	    (u_longlong_t)dd->dd_parent_obj);
689	(void) printf("\t\tclone_parent_obj = %llu\n",
690	    (u_longlong_t)dd->dd_clone_parent_obj);
691	(void) printf("\t\tchild_dir_zapobj = %llu\n",
692	    (u_longlong_t)dd->dd_child_dir_zapobj);
693	(void) printf("\t\tused_bytes = %s\n", used);
694	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
695	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
696	(void) printf("\t\tquota = %s\n", quota);
697	(void) printf("\t\treserved = %s\n", resv);
698	(void) printf("\t\tprops_zapobj = %llu\n",
699	    (u_longlong_t)dd->dd_props_zapobj);
700}
701
702/*ARGSUSED*/
703static void
704dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
705{
706	dsl_dataset_phys_t *ds = data;
707	time_t crtime;
708	char used[6], compressed[6], uncompressed[6], unique[6];
709	char blkbuf[BP_SPRINTF_LEN];
710
711	if (ds == NULL)
712		return;
713
714	ASSERT(size == sizeof (*ds));
715	crtime = ds->ds_creation_time;
716	nicenum(ds->ds_used_bytes, used);
717	nicenum(ds->ds_compressed_bytes, compressed);
718	nicenum(ds->ds_uncompressed_bytes, uncompressed);
719	nicenum(ds->ds_unique_bytes, unique);
720	sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ds->ds_bp);
721
722	(void) printf("\t\tdataset_obj = %llu\n",
723	    (u_longlong_t)ds->ds_dir_obj);
724	(void) printf("\t\tprev_snap_obj = %llu\n",
725	    (u_longlong_t)ds->ds_prev_snap_obj);
726	(void) printf("\t\tprev_snap_txg = %llu\n",
727	    (u_longlong_t)ds->ds_prev_snap_txg);
728	(void) printf("\t\tnext_snap_obj = %llu\n",
729	    (u_longlong_t)ds->ds_next_snap_obj);
730	(void) printf("\t\tsnapnames_zapobj = %llu\n",
731	    (u_longlong_t)ds->ds_snapnames_zapobj);
732	(void) printf("\t\tnum_children = %llu\n",
733	    (u_longlong_t)ds->ds_num_children);
734	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
735	(void) printf("\t\tcreation_txg = %llu\n",
736	    (u_longlong_t)ds->ds_creation_txg);
737	(void) printf("\t\tdeadlist_obj = %llu\n",
738	    (u_longlong_t)ds->ds_deadlist_obj);
739	(void) printf("\t\tused_bytes = %s\n", used);
740	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
741	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
742	(void) printf("\t\tunique = %s\n", unique);
743	(void) printf("\t\tfsid_guid = %llu\n",
744	    (u_longlong_t)ds->ds_fsid_guid);
745	(void) printf("\t\tguid = %llu\n",
746	    (u_longlong_t)ds->ds_guid);
747	(void) printf("\t\tinconsistent = %llu\n",
748	    (u_longlong_t)ds->ds_inconsistent);
749	(void) printf("\t\tbp = %s\n", blkbuf);
750}
751
752static void
753dump_bplist(objset_t *mos, uint64_t object, char *name)
754{
755	bplist_t bpl = { 0 };
756	blkptr_t blk, *bp = &blk;
757	uint64_t itor = 0;
758	char numbuf[6];
759
760	if (dump_opt['d'] < 3)
761		return;
762
763	VERIFY(0 == bplist_open(&bpl, mos, object));
764	if (bplist_empty(&bpl)) {
765		bplist_close(&bpl);
766		return;
767	}
768
769	nicenum(bpl.bpl_phys->bpl_bytes, numbuf);
770
771	(void) printf("\n    %s: %llu entries, %s\n",
772	    name, (u_longlong_t)bpl.bpl_phys->bpl_entries, numbuf);
773
774	if (dump_opt['d'] < 5) {
775		bplist_close(&bpl);
776		return;
777	}
778
779	(void) printf("\n");
780
781	while (bplist_iterate(&bpl, &itor, bp) == 0) {
782		char blkbuf[BP_SPRINTF_LEN];
783
784		ASSERT(bp->blk_birth != 0);
785		sprintf_blkptr_compact(blkbuf, bp, dump_opt['d'] > 5 ? 1 : 0);
786		(void) printf("\tItem %3llu: %s\n",
787		    (u_longlong_t)itor - 1, blkbuf);
788	}
789
790	bplist_close(&bpl);
791}
792
793static char *
794znode_path(objset_t *os, uint64_t object, char *pathbuf, size_t size)
795{
796	dmu_buf_t *db;
797	dmu_object_info_t doi;
798	znode_phys_t *zp;
799	uint64_t parent = 0;
800	size_t complen;
801	char component[MAXNAMELEN + 1];
802	char *path;
803	int error;
804
805	path = pathbuf + size;
806	*--path = '\0';
807
808	for (;;) {
809		error = dmu_bonus_hold(os, object, FTAG, &db);
810		if (error)
811			break;
812
813		dmu_object_info_from_db(db, &doi);
814		zp = db->db_data;
815		parent = zp->zp_parent;
816		dmu_buf_rele(db, FTAG);
817
818		if (doi.doi_bonus_type != DMU_OT_ZNODE)
819			break;
820
821		if (parent == object) {
822			if (path[0] != '/')
823				*--path = '/';
824			return (path);
825		}
826
827		if (zap_value_search(os, parent, object, component) != 0)
828			break;
829
830		complen = strlen(component);
831		path -= complen;
832		bcopy(component, path, complen);
833		*--path = '/';
834
835		object = parent;
836	}
837
838	(void) sprintf(component, "???<object#%llu>", (u_longlong_t)object);
839
840	complen = strlen(component);
841	path -= complen;
842	bcopy(component, path, complen);
843
844	return (path);
845}
846
847/*ARGSUSED*/
848static void
849dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
850{
851	znode_phys_t *zp = data;
852	time_t z_crtime, z_atime, z_mtime, z_ctime;
853	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
854
855	ASSERT(size >= sizeof (znode_phys_t));
856
857	if (dump_opt['d'] < 3) {
858		(void) printf("\t%s\n",
859		    znode_path(os, object, path, sizeof (path)));
860		return;
861	}
862
863	z_crtime = (time_t)zp->zp_crtime[0];
864	z_atime = (time_t)zp->zp_atime[0];
865	z_mtime = (time_t)zp->zp_mtime[0];
866	z_ctime = (time_t)zp->zp_ctime[0];
867
868	(void) printf("\tpath	%s\n",
869	    znode_path(os, object, path, sizeof (path)));
870	(void) printf("\tatime	%s", ctime(&z_atime));
871	(void) printf("\tmtime	%s", ctime(&z_mtime));
872	(void) printf("\tctime	%s", ctime(&z_ctime));
873	(void) printf("\tcrtime	%s", ctime(&z_crtime));
874	(void) printf("\tgen	%llu\n", (u_longlong_t)zp->zp_gen);
875	(void) printf("\tmode	%llo\n", (u_longlong_t)zp->zp_mode);
876	(void) printf("\tsize	%llu\n", (u_longlong_t)zp->zp_size);
877	(void) printf("\tparent	%llu\n", (u_longlong_t)zp->zp_parent);
878	(void) printf("\tlinks	%llu\n", (u_longlong_t)zp->zp_links);
879	(void) printf("\txattr	%llu\n", (u_longlong_t)zp->zp_xattr);
880	(void) printf("\trdev	0x%016llx\n", (u_longlong_t)zp->zp_rdev);
881}
882
883/*ARGSUSED*/
884static void
885dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
886{
887}
888
889/*ARGSUSED*/
890static void
891dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
892{
893}
894
895static object_viewer_t *object_viewer[DMU_OT_NUMTYPES] = {
896	dump_none,		/* unallocated			*/
897	dump_zap,		/* object directory		*/
898	dump_uint64,		/* object array			*/
899	dump_none,		/* packed nvlist		*/
900	dump_packed_nvlist,	/* packed nvlist size		*/
901	dump_none,		/* bplist			*/
902	dump_none,		/* bplist header		*/
903	dump_none,		/* SPA space map header		*/
904	dump_none,		/* SPA space map		*/
905	dump_none,		/* ZIL intent log		*/
906	dump_dnode,		/* DMU dnode			*/
907	dump_dmu_objset,	/* DMU objset			*/
908	dump_dsl_dir,		/* DSL directory		*/
909	dump_zap,		/* DSL directory child map	*/
910	dump_zap,		/* DSL dataset snap map		*/
911	dump_zap,		/* DSL props			*/
912	dump_dsl_dataset,	/* DSL dataset			*/
913	dump_znode,		/* ZFS znode			*/
914	dump_acl,		/* ZFS ACL			*/
915	dump_uint8,		/* ZFS plain file		*/
916	dump_zap,		/* ZFS directory		*/
917	dump_zap,		/* ZFS master node		*/
918	dump_zap,		/* ZFS delete queue		*/
919	dump_uint8,		/* zvol object			*/
920	dump_zap,		/* zvol prop			*/
921	dump_uint8,		/* other uint8[]		*/
922	dump_uint64,		/* other uint64[]		*/
923	dump_zap,		/* other ZAP			*/
924	dump_zap,		/* persistent error log		*/
925};
926
927static void
928dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
929{
930	dmu_buf_t *db = NULL;
931	dmu_object_info_t doi;
932	dnode_t *dn;
933	void *bonus = NULL;
934	size_t bsize = 0;
935	char iblk[6], dblk[6], lsize[6], asize[6], bonus_size[6], segsize[6];
936	char aux[50];
937	int error;
938
939	if (*print_header) {
940		(void) printf("\n    Object  lvl   iblk   dblk  lsize"
941		    "  asize  type\n");
942		*print_header = 0;
943	}
944
945	if (object == 0) {
946		dn = os->os->os_meta_dnode;
947	} else {
948		error = dmu_bonus_hold(os, object, FTAG, &db);
949		if (error)
950			fatal("dmu_bonus_hold(%llu) failed, errno %u",
951			    object, error);
952		bonus = db->db_data;
953		bsize = db->db_size;
954		dn = ((dmu_buf_impl_t *)db)->db_dnode;
955	}
956	dmu_object_info_from_dnode(dn, &doi);
957
958	nicenum(doi.doi_metadata_block_size, iblk);
959	nicenum(doi.doi_data_block_size, dblk);
960	nicenum(doi.doi_data_block_size * (doi.doi_max_block_offset + 1),
961	    lsize);
962	nicenum(doi.doi_physical_blks << 9, asize);
963	nicenum(doi.doi_bonus_size, bonus_size);
964
965	aux[0] = '\0';
966
967	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6)
968		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
969		zio_checksum_table[doi.doi_checksum].ci_name);
970
971	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6)
972		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
973		zio_compress_table[doi.doi_compress].ci_name);
974
975	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %s%s\n",
976	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk, lsize,
977	    asize, dmu_ot[doi.doi_type].ot_name, aux);
978
979	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
980		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %s\n",
981		    "", "", "", "", bonus_size, "bonus",
982		    dmu_ot[doi.doi_bonus_type].ot_name);
983	}
984
985	if (verbosity >= 4) {
986		object_viewer[doi.doi_bonus_type](os, object, bonus, bsize);
987		object_viewer[doi.doi_type](os, object, NULL, 0);
988		*print_header = 1;
989	}
990
991	if (verbosity >= 5)
992		dump_indirect(os, object, NULL, 0);
993
994	if (verbosity >= 5) {
995		/*
996		 * Report the list of segments that comprise the object.
997		 */
998		uint64_t start = 0;
999		uint64_t end;
1000		uint64_t blkfill = 1;
1001		int minlvl = 1;
1002
1003		if (dn->dn_type == DMU_OT_DNODE) {
1004			minlvl = 0;
1005			blkfill = DNODES_PER_BLOCK;
1006		}
1007
1008		for (;;) {
1009			error = dnode_next_offset(dn, B_FALSE, &start, minlvl,
1010			    blkfill);
1011			if (error)
1012				break;
1013			end = start;
1014			error = dnode_next_offset(dn, B_TRUE, &end, minlvl,
1015			    blkfill);
1016			nicenum(end - start, segsize);
1017			(void) printf("\t\tsegment [%016llx, %016llx)"
1018			    " size %5s\n", (u_longlong_t)start,
1019			    (u_longlong_t)end, segsize);
1020			if (error)
1021				break;
1022			start = end;
1023		}
1024	}
1025
1026	if (db != NULL)
1027		dmu_buf_rele(db, FTAG);
1028}
1029
1030static char *objset_types[DMU_OST_NUMTYPES] = {
1031	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1032
1033/*ARGSUSED*/
1034static void
1035dump_dir(objset_t *os)
1036{
1037	dmu_objset_stats_t dds;
1038	uint64_t object, object_count;
1039	char numbuf[8];
1040	char blkbuf[BP_SPRINTF_LEN];
1041	char osname[MAXNAMELEN];
1042	char *type = "UNKNOWN";
1043	int verbosity = dump_opt['d'];
1044	int print_header = 1;
1045	int i, error;
1046
1047	dmu_objset_stats(os, &dds);
1048
1049	if (dds.dds_type < DMU_OST_NUMTYPES)
1050		type = objset_types[dds.dds_type];
1051
1052	if (dds.dds_type == DMU_OST_META) {
1053		dds.dds_creation_txg = TXG_INITIAL;
1054		dds.dds_last_txg = os->os->os_rootbp.blk_birth;
1055		dds.dds_objects_used = os->os->os_rootbp.blk_fill;
1056		dds.dds_space_refd =
1057		    os->os->os_spa->spa_dsl_pool->dp_mos_dir->dd_used_bytes;
1058	}
1059
1060	ASSERT3U(dds.dds_objects_used, ==, os->os->os_rootbp.blk_fill);
1061
1062	nicenum(dds.dds_space_refd, numbuf);
1063
1064	if (verbosity >= 4) {
1065		(void) strcpy(blkbuf, ", rootbp ");
1066		sprintf_blkptr(blkbuf + strlen(blkbuf),
1067		    BP_SPRINTF_LEN - strlen(blkbuf), &os->os->os_rootbp);
1068	} else {
1069		blkbuf[0] = '\0';
1070	}
1071
1072	dmu_objset_name(os, osname);
1073
1074	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, last_txg %llu, "
1075	    "%s, %llu objects%s\n",
1076	    osname, type, (u_longlong_t)dmu_objset_id(os),
1077	    (u_longlong_t)dds.dds_creation_txg,
1078	    (u_longlong_t)dds.dds_last_txg,
1079	    numbuf,
1080	    (u_longlong_t)dds.dds_objects_used,
1081	    blkbuf);
1082
1083	dump_intent_log(dmu_objset_zil(os));
1084
1085	if (dmu_objset_ds(os) != NULL)
1086		dump_bplist(dmu_objset_pool(os)->dp_meta_objset,
1087		    dmu_objset_ds(os)->ds_phys->ds_deadlist_obj, "Deadlist");
1088
1089	if (verbosity < 2)
1090		return;
1091
1092	if (zopt_objects != 0) {
1093		for (i = 0; i < zopt_objects; i++)
1094			dump_object(os, zopt_object[i], verbosity,
1095			    &print_header);
1096		(void) printf("\n");
1097		return;
1098	}
1099
1100	dump_object(os, 0, verbosity, &print_header);
1101	object_count = 1;
1102
1103	object = 0;
1104	while ((error = dmu_object_next(os, &object, B_FALSE)) == 0) {
1105		dump_object(os, object, verbosity, &print_header);
1106		object_count++;
1107	}
1108
1109	ASSERT3U(object_count, ==, dds.dds_objects_used);
1110
1111	(void) printf("\n");
1112
1113	if (error != ESRCH)
1114		fatal("dmu_object_next() = %d", error);
1115}
1116
1117static void
1118dump_uberblock(uberblock_t *ub)
1119{
1120	time_t timestamp = ub->ub_timestamp;
1121
1122	(void) printf("Uberblock\n\n");
1123	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1124	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1125	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1126	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1127	(void) printf("\ttimestamp = %llu UTC = %s",
1128	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1129	if (dump_opt['u'] >= 3) {
1130		char blkbuf[BP_SPRINTF_LEN];
1131		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ub->ub_rootbp);
1132		(void) printf("\trootbp = %s\n", blkbuf);
1133	}
1134	(void) printf("\n");
1135}
1136
1137static void
1138dump_config(const char *pool)
1139{
1140	spa_t *spa = NULL;
1141
1142	mutex_enter(&spa_namespace_lock);
1143	while ((spa = spa_next(spa)) != NULL) {
1144		if (pool == NULL)
1145			(void) printf("%s\n", spa_name(spa));
1146		if (pool == NULL || strcmp(pool, spa_name(spa)) == 0)
1147			dump_nvlist(spa->spa_config, 4);
1148	}
1149	mutex_exit(&spa_namespace_lock);
1150}
1151
1152static void
1153dump_label(const char *dev)
1154{
1155	int fd;
1156	vdev_label_t label;
1157	char *buf = label.vl_vdev_phys.vp_nvlist;
1158	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
1159	struct stat64 statbuf;
1160	uint64_t psize;
1161	int l;
1162
1163	if ((fd = open64(dev, O_RDONLY)) < 0) {
1164		(void) printf("cannot open '%s': %s\n", dev, strerror(errno));
1165		exit(1);
1166	}
1167
1168	if (fstat64(fd, &statbuf) != 0) {
1169		(void) printf("failed to stat '%s': %s\n", dev,
1170		    strerror(errno));
1171		exit(1);
1172	}
1173
1174	psize = statbuf.st_size;
1175	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
1176
1177	for (l = 0; l < VDEV_LABELS; l++) {
1178
1179		nvlist_t *config = NULL;
1180
1181		(void) printf("--------------------------------------------\n");
1182		(void) printf("LABEL %d\n", l);
1183		(void) printf("--------------------------------------------\n");
1184
1185		if (pread64(fd, &label, sizeof (label),
1186		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
1187			(void) printf("failed to read label %d\n", l);
1188			continue;
1189		}
1190
1191		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
1192			(void) printf("failed to unpack label %d\n", l);
1193			continue;
1194		}
1195		dump_nvlist(config, 4);
1196		nvlist_free(config);
1197	}
1198}
1199
1200/*ARGSUSED*/
1201static void
1202dump_one_dir(char *dsname, void *arg)
1203{
1204	int error;
1205	objset_t *os;
1206
1207	error = dmu_objset_open(dsname, DMU_OST_ANY,
1208	    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
1209	if (error) {
1210		(void) printf("Could not open %s\n", dsname);
1211		return;
1212	}
1213	dump_dir(os);
1214	dmu_objset_close(os);
1215}
1216
1217static void
1218zdb_space_map_load(spa_t *spa)
1219{
1220	vdev_t *rvd = spa->spa_root_vdev;
1221	vdev_t *vd;
1222	int c, m, error;
1223
1224	for (c = 0; c < rvd->vdev_children; c++) {
1225		vd = rvd->vdev_child[c];
1226		for (m = 0; m < vd->vdev_ms_count; m++) {
1227			metaslab_t *msp = vd->vdev_ms[m];
1228			mutex_enter(&msp->ms_lock);
1229			error = space_map_load(&msp->ms_allocmap[0], NULL,
1230			    SM_ALLOC, &msp->ms_smo, spa->spa_meta_objset);
1231			mutex_exit(&msp->ms_lock);
1232			if (error)
1233				fatal("%s bad space map #%d, error %d",
1234				    spa->spa_name, c, error);
1235		}
1236	}
1237}
1238
1239static int
1240zdb_space_map_claim(spa_t *spa, blkptr_t *bp, zbookmark_t *zb)
1241{
1242	dva_t *dva = bp->blk_dva;
1243	vdev_t *vd;
1244	metaslab_t *msp;
1245	space_map_t *allocmap, *freemap;
1246	int error;
1247	int d;
1248	blkptr_t blk = *bp;
1249
1250	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1251		uint64_t vdev = DVA_GET_VDEV(&dva[d]);
1252		uint64_t offset = DVA_GET_OFFSET(&dva[d]);
1253		uint64_t size = DVA_GET_ASIZE(&dva[d]);
1254
1255		if ((vd = vdev_lookup_top(spa, vdev)) == NULL)
1256			return (ENXIO);
1257
1258		if ((offset >> vd->vdev_ms_shift) >= vd->vdev_ms_count)
1259			return (ENXIO);
1260
1261		msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
1262		allocmap = &msp->ms_allocmap[0];
1263		freemap = &msp->ms_freemap[0];
1264
1265		/* Prepare our copy of the bp in case we need to read GBHs */
1266		if (DVA_GET_GANG(&dva[d])) {
1267			size = vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE);
1268			DVA_SET_ASIZE(&blk.blk_dva[d], size);
1269			DVA_SET_GANG(&blk.blk_dva[d], 0);
1270		}
1271
1272		mutex_enter(&msp->ms_lock);
1273		if (space_map_contains(freemap, offset, size)) {
1274			mutex_exit(&msp->ms_lock);
1275			return (EAGAIN);	/* allocated more than once */
1276		}
1277
1278		if (!space_map_contains(allocmap, offset, size)) {
1279			mutex_exit(&msp->ms_lock);
1280			return (ESTALE);	/* not allocated at all */
1281		}
1282
1283		space_map_remove(allocmap, offset, size);
1284		space_map_add(freemap, offset, size);
1285
1286		mutex_exit(&msp->ms_lock);
1287	}
1288
1289	if (BP_IS_GANG(bp)) {
1290		zio_gbh_phys_t gbh;
1291		int g;
1292
1293		/* LINTED - compile time assert */
1294		ASSERT(sizeof (zio_gbh_phys_t) == SPA_GANGBLOCKSIZE);
1295
1296		BP_SET_CHECKSUM(&blk, ZIO_CHECKSUM_GANG_HEADER);
1297		BP_SET_PSIZE(&blk, SPA_GANGBLOCKSIZE);
1298		BP_SET_LSIZE(&blk, SPA_GANGBLOCKSIZE);
1299		BP_SET_COMPRESS(&blk, ZIO_COMPRESS_OFF);
1300		error = zio_wait(zio_read(NULL, spa, &blk, &gbh,
1301		    SPA_GANGBLOCKSIZE, NULL, NULL, ZIO_PRIORITY_SYNC_READ,
1302		    ZIO_FLAG_CANFAIL | ZIO_FLAG_CONFIG_HELD, zb));
1303		if (error)
1304			return (error);
1305		if (BP_SHOULD_BYTESWAP(&blk))
1306			byteswap_uint64_array(&gbh, SPA_GANGBLOCKSIZE);
1307		for (g = 0; g < SPA_GBH_NBLKPTRS; g++) {
1308			if (BP_IS_HOLE(&gbh.zg_blkptr[g]))
1309				break;
1310			error = zdb_space_map_claim(spa, &gbh.zg_blkptr[g], zb);
1311			if (error)
1312				return (error);
1313		}
1314	}
1315
1316	return (0);
1317}
1318
1319static void
1320zdb_leak(space_map_t *sm, uint64_t start, uint64_t size)
1321{
1322	metaslab_t *msp;
1323
1324	/* LINTED */
1325	msp = (metaslab_t *)((char *)sm - offsetof(metaslab_t, ms_allocmap[0]));
1326
1327	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
1328	    (u_longlong_t)msp->ms_group->mg_vd->vdev_id,
1329	    (u_longlong_t)start,
1330	    (u_longlong_t)size);
1331}
1332
1333static void
1334zdb_space_map_unload(spa_t *spa)
1335{
1336	vdev_t *rvd = spa->spa_root_vdev;
1337	vdev_t *vd;
1338	int c, m;
1339
1340	for (c = 0; c < rvd->vdev_children; c++) {
1341		vd = rvd->vdev_child[c];
1342		for (m = 0; m < vd->vdev_ms_count; m++) {
1343			metaslab_t *msp = vd->vdev_ms[m];
1344			mutex_enter(&msp->ms_lock);
1345			space_map_vacate(&msp->ms_allocmap[0], zdb_leak,
1346			    &msp->ms_allocmap[0]);
1347			space_map_unload(&msp->ms_allocmap[0]);
1348			space_map_vacate(&msp->ms_freemap[0], NULL, NULL);
1349			mutex_exit(&msp->ms_lock);
1350		}
1351	}
1352}
1353
1354static void
1355zdb_refresh_ubsync(spa_t *spa)
1356{
1357	uberblock_t ub = { 0 };
1358	vdev_t *rvd = spa->spa_root_vdev;
1359	zio_t *zio;
1360
1361	/*
1362	 * Reload the uberblock.
1363	 */
1364	zio = zio_root(spa, NULL, NULL,
1365	    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1366	vdev_uberblock_load(zio, rvd, &ub);
1367	(void) zio_wait(zio);
1368
1369	if (ub.ub_txg != 0)
1370		spa->spa_ubsync = ub;
1371}
1372
1373/*
1374 * Verify that the sum of the sizes of all blocks in the pool adds up
1375 * to the SPA's sa_alloc total.
1376 */
1377typedef struct zdb_blkstats {
1378	uint64_t	zb_asize;
1379	uint64_t	zb_lsize;
1380	uint64_t	zb_psize;
1381	uint64_t	zb_count;
1382} zdb_blkstats_t;
1383
1384#define	DMU_OT_DEFERRED	DMU_OT_NONE
1385#define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
1386
1387#define	ZB_TOTAL	ZB_MAXLEVEL
1388
1389typedef struct zdb_cb {
1390	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][DMU_OT_TOTAL + 1];
1391	uint64_t	zcb_errors[256];
1392	traverse_blk_cache_t *zcb_cache;
1393	int		zcb_readfails;
1394	int		zcb_haderrors;
1395} zdb_cb_t;
1396
1397static void
1398zdb_count_block(spa_t *spa, zdb_cb_t *zcb, blkptr_t *bp, int type)
1399{
1400	int i, error;
1401
1402	for (i = 0; i < 4; i++) {
1403		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
1404		int t = (i & 1) ? type : DMU_OT_TOTAL;
1405		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
1406
1407		zb->zb_asize += BP_GET_ASIZE(bp);
1408		zb->zb_lsize += BP_GET_LSIZE(bp);
1409		zb->zb_psize += BP_GET_PSIZE(bp);
1410		zb->zb_count++;
1411	}
1412
1413	if (dump_opt['L'])
1414		return;
1415
1416	error = zdb_space_map_claim(spa, bp, &zcb->zcb_cache->bc_bookmark);
1417
1418	if (error == 0)
1419		return;
1420
1421	if (error == EAGAIN)
1422		(void) fatal("double-allocation, bp=%p", bp);
1423
1424	if (error == ESTALE)
1425		(void) fatal("reference to freed block, bp=%p", bp);
1426
1427	(void) fatal("fatal error %d in bp %p", error, bp);
1428}
1429
1430static int
1431zdb_blkptr_cb(traverse_blk_cache_t *bc, spa_t *spa, void *arg)
1432{
1433	zbookmark_t *zb = &bc->bc_bookmark;
1434	zdb_cb_t *zcb = arg;
1435	blkptr_t *bp = &bc->bc_blkptr;
1436	dmu_object_type_t type = BP_GET_TYPE(bp);
1437	char blkbuf[BP_SPRINTF_LEN];
1438	int error = 0;
1439
1440	if (bc->bc_errno) {
1441		if (zcb->zcb_readfails++ < 10 && dump_opt['L']) {
1442			zdb_refresh_ubsync(spa);
1443			error = EAGAIN;
1444		} else {
1445			zcb->zcb_haderrors = 1;
1446			zcb->zcb_errors[bc->bc_errno]++;
1447			error = ERESTART;
1448		}
1449
1450		if (dump_opt['b'] >= 3 || (dump_opt['b'] >= 2 && bc->bc_errno))
1451			sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1452		else
1453			blkbuf[0] = '\0';
1454
1455		(void) printf("zdb_blkptr_cb: Got error %d reading "
1456		    "<%llu, %llu, %lld, %llx> %s -- %s\n",
1457		    bc->bc_errno,
1458		    (u_longlong_t)zb->zb_objset,
1459		    (u_longlong_t)zb->zb_object,
1460		    (u_longlong_t)zb->zb_level,
1461		    (u_longlong_t)zb->zb_blkid,
1462		    blkbuf,
1463		    error == EAGAIN ? "retrying" : "skipping");
1464
1465		return (error);
1466	}
1467
1468	zcb->zcb_readfails = 0;
1469
1470	ASSERT(!BP_IS_HOLE(bp));
1471
1472	if (dump_opt['b'] >= 4) {
1473		sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1474		(void) printf("objset %llu object %llu offset 0x%llx %s\n",
1475		    (u_longlong_t)zb->zb_objset,
1476		    (u_longlong_t)zb->zb_object,
1477		    (u_longlong_t)blkid2offset(bc->bc_dnode,
1478			zb->zb_level, zb->zb_blkid),
1479		    blkbuf);
1480	}
1481
1482	zdb_count_block(spa, zcb, bp, type);
1483
1484	return (0);
1485}
1486
1487static int
1488dump_block_stats(spa_t *spa)
1489{
1490	traverse_handle_t *th;
1491	zdb_cb_t zcb = { 0 };
1492	traverse_blk_cache_t dummy_cache = { 0 };
1493	zdb_blkstats_t *zb, *tzb;
1494	uint64_t alloc, space;
1495	int leaks = 0;
1496	int advance = zdb_advance;
1497	int flags;
1498	int e;
1499
1500	zcb.zcb_cache = &dummy_cache;
1501
1502	if (dump_opt['c'])
1503		advance |= ADVANCE_DATA;
1504
1505	advance |= ADVANCE_PRUNE | ADVANCE_ZIL;
1506
1507	(void) printf("\nTraversing all blocks to %sverify"
1508	    " nothing leaked ...\n",
1509	    dump_opt['c'] ? "verify checksums and " : "");
1510
1511	/*
1512	 * Load all space maps.  As we traverse the pool, if we find a block
1513	 * that's not in its space map, that indicates a double-allocation,
1514	 * reference to a freed block, or an unclaimed block.  Otherwise we
1515	 * remove the block from the space map.  If the space maps are not
1516	 * empty when we're done, that indicates leaked blocks.
1517	 */
1518	if (!dump_opt['L'])
1519		zdb_space_map_load(spa);
1520
1521	/*
1522	 * If there's a deferred-free bplist, process that first.
1523	 */
1524	if (spa->spa_sync_bplist_obj != 0) {
1525		bplist_t *bpl = &spa->spa_sync_bplist;
1526		blkptr_t blk;
1527		uint64_t itor = 0;
1528
1529		VERIFY(0 == bplist_open(bpl, spa->spa_meta_objset,
1530		    spa->spa_sync_bplist_obj));
1531
1532		while (bplist_iterate(bpl, &itor, &blk) == 0) {
1533			if (dump_opt['b'] >= 4) {
1534				char blkbuf[BP_SPRINTF_LEN];
1535				sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &blk);
1536				(void) printf("[%s] %s\n",
1537				    "deferred free", blkbuf);
1538			}
1539			zdb_count_block(spa, &zcb, &blk, DMU_OT_DEFERRED);
1540		}
1541
1542		bplist_close(bpl);
1543	}
1544
1545	/*
1546	 * Now traverse the pool.  If we're reading all data to verify
1547	 * checksums, do a scrubbing read so that we validate all copies.
1548	 */
1549	flags = ZIO_FLAG_CANFAIL;
1550	if (advance & ADVANCE_DATA)
1551		flags |= ZIO_FLAG_SCRUB;
1552	th = traverse_init(spa, zdb_blkptr_cb, &zcb, advance, flags);
1553	th->th_noread = zdb_noread;
1554
1555	traverse_add_pool(th, 0, spa_first_txg(spa) + TXG_CONCURRENT_STATES);
1556
1557	while (traverse_more(th) == EAGAIN)
1558		continue;
1559
1560	traverse_fini(th);
1561
1562	if (zcb.zcb_haderrors) {
1563		(void) printf("\nError counts:\n\n");
1564		(void) printf("\t%5s  %s\n", "errno", "count");
1565		for (e = 0; e < 256; e++) {
1566			if (zcb.zcb_errors[e] != 0) {
1567				(void) printf("\t%5d  %llu\n",
1568				    e, (u_longlong_t)zcb.zcb_errors[e]);
1569			}
1570		}
1571	}
1572
1573	/*
1574	 * Report any leaked segments.
1575	 */
1576	if (!dump_opt['L'])
1577		zdb_space_map_unload(spa);
1578
1579	if (dump_opt['L'])
1580		(void) printf("\n\n *** Live pool traversal; "
1581		    "block counts are only approximate ***\n\n");
1582
1583	alloc = spa_get_alloc(spa);
1584	space = spa_get_space(spa);
1585
1586	tzb = &zcb.zcb_type[ZB_TOTAL][DMU_OT_TOTAL];
1587
1588	if (tzb->zb_asize == alloc) {
1589		(void) printf("\n\tNo leaks (block sum matches space"
1590		    " maps exactly)\n");
1591	} else {
1592		(void) printf("block traversal size %llu != alloc %llu "
1593		    "(leaked %lld)\n",
1594		    (u_longlong_t)tzb->zb_asize,
1595		    (u_longlong_t)alloc,
1596		    (u_longlong_t)(alloc - tzb->zb_asize));
1597		leaks = 1;
1598	}
1599
1600	if (tzb->zb_count == 0)
1601		return (2);
1602
1603	(void) printf("\n");
1604	(void) printf("\tbp count:      %10llu\n",
1605	    (u_longlong_t)tzb->zb_count);
1606	(void) printf("\tbp logical:    %10llu\t avg: %6llu\n",
1607	    (u_longlong_t)tzb->zb_lsize,
1608	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
1609	(void) printf("\tbp physical:   %10llu\t avg:"
1610	    " %6llu\tcompression: %6.2f\n",
1611	    (u_longlong_t)tzb->zb_psize,
1612	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
1613	    (double)tzb->zb_lsize / tzb->zb_psize);
1614	(void) printf("\tbp allocated:  %10llu\t avg:"
1615	    " %6llu\tcompression: %6.2f\n",
1616	    (u_longlong_t)tzb->zb_asize,
1617	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
1618	    (double)tzb->zb_lsize / tzb->zb_asize);
1619	(void) printf("\tSPA allocated: %10llu\tused: %5.2f%%\n",
1620	    (u_longlong_t)alloc, 100.0 * alloc / space);
1621
1622	if (dump_opt['b'] >= 2) {
1623		int l, t, level;
1624		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
1625		    "\t  avg\t comp\t%%Total\tType\n");
1626
1627		for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
1628			char csize[6], lsize[6], psize[6], asize[6], avg[6];
1629			char *typename;
1630
1631			typename = t == DMU_OT_DEFERRED ? "deferred free" :
1632			    t == DMU_OT_TOTAL ? "Total" : dmu_ot[t].ot_name;
1633
1634			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
1635				(void) printf("%6s\t%5s\t%5s\t%5s"
1636				    "\t%5s\t%5s\t%6s\t%s\n",
1637				    "-",
1638				    "-",
1639				    "-",
1640				    "-",
1641				    "-",
1642				    "-",
1643				    "-",
1644				    typename);
1645				continue;
1646			}
1647
1648			for (l = ZB_TOTAL - 1; l >= -1; l--) {
1649				level = (l == -1 ? ZB_TOTAL : l);
1650				zb = &zcb.zcb_type[level][t];
1651
1652				if (zb->zb_asize == 0)
1653					continue;
1654
1655				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
1656					continue;
1657
1658				if (level == 0 && zb->zb_asize ==
1659				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
1660					continue;
1661
1662				nicenum(zb->zb_count, csize);
1663				nicenum(zb->zb_lsize, lsize);
1664				nicenum(zb->zb_psize, psize);
1665				nicenum(zb->zb_asize, asize);
1666				nicenum(zb->zb_asize / zb->zb_count, avg);
1667
1668				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
1669				    "\t%5.2f\t%6.2f\t",
1670				    csize, lsize, psize, asize, avg,
1671				    (double)zb->zb_lsize / zb->zb_psize,
1672				    100.0 * zb->zb_asize / tzb->zb_asize);
1673
1674				if (level == ZB_TOTAL)
1675					(void) printf("%s\n", typename);
1676				else
1677					(void) printf("    L%d %s\n",
1678					    level, typename);
1679			}
1680		}
1681	}
1682
1683	(void) printf("\n");
1684
1685	if (leaks)
1686		return (2);
1687
1688	if (zcb.zcb_haderrors)
1689		return (3);
1690
1691	return (0);
1692}
1693
1694static void
1695dump_zpool(spa_t *spa)
1696{
1697	dsl_pool_t *dp = spa_get_dsl(spa);
1698	int rc = 0;
1699
1700	if (dump_opt['u'])
1701		dump_uberblock(&spa->spa_uberblock);
1702
1703	if (dump_opt['d'] || dump_opt['i']) {
1704		dump_dir(dp->dp_meta_objset);
1705		if (dump_opt['d'] >= 3) {
1706			dump_bplist(dp->dp_meta_objset,
1707			    spa->spa_sync_bplist_obj, "Deferred frees");
1708			dump_dtl(spa->spa_root_vdev, 0);
1709			dump_metaslabs(spa);
1710		}
1711		dmu_objset_find(spa->spa_name, dump_one_dir, NULL,
1712		    DS_FIND_SNAPSHOTS);
1713	}
1714
1715	if (dump_opt['b'] || dump_opt['c'])
1716		rc = dump_block_stats(spa);
1717
1718	if (dump_opt['s'])
1719		show_pool_stats(spa);
1720
1721	if (rc != 0)
1722		exit(rc);
1723}
1724
1725#define	ZDB_FLAG_CHECKSUM	0x0001
1726#define	ZDB_FLAG_DECOMPRESS	0x0002
1727#define	ZDB_FLAG_BSWAP		0x0004
1728#define	ZDB_FLAG_GBH		0x0008
1729#define	ZDB_FLAG_INDIRECT	0x0010
1730#define	ZDB_FLAG_PHYS		0x0020
1731#define	ZDB_FLAG_RAW		0x0040
1732#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
1733
1734int flagbits[256];
1735
1736static void
1737zdb_print_blkptr(blkptr_t *bp, int flags)
1738{
1739	dva_t *dva = bp->blk_dva;
1740	int d;
1741
1742	if (flags & ZDB_FLAG_BSWAP)
1743		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
1744	/*
1745	 * Super-ick warning:  This code is also duplicated in
1746	 * cmd/mdb/common/modules/zfs/zfs.c .  Yeah, I hate code
1747	 * replication, too.
1748	 */
1749	for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1750		(void) printf("\tDVA[%d]: vdev_id %lld / %llx\n", d,
1751		    DVA_GET_VDEV(&dva[d]), DVA_GET_OFFSET(&dva[d]));
1752		(void) printf("\tDVA[%d]:       GANG: %-5s  GRID:  %04llx\t"
1753		    "ASIZE: %llx\n", d,
1754		    DVA_GET_GANG(&dva[d]) ? "TRUE" : "FALSE",
1755		    DVA_GET_GRID(&dva[d]), DVA_GET_ASIZE(&dva[d]));
1756		(void) printf("\tDVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", d,
1757		    DVA_GET_VDEV(&dva[d]), DVA_GET_OFFSET(&dva[d]),
1758		    BP_GET_PSIZE(bp),
1759		    BP_SHOULD_BYTESWAP(bp) ? "e" : "",
1760		    !DVA_GET_GANG(&dva[d]) && BP_GET_LEVEL(bp) != 0 ?
1761		    "d" : "",
1762		    DVA_GET_GANG(&dva[d]) ? "g" : "",
1763		    BP_GET_COMPRESS(bp) != 0 ? "d" : "");
1764	}
1765	(void) printf("\tLSIZE:  %-16llx\t\tPSIZE: %llx\n",
1766	    BP_GET_LSIZE(bp), BP_GET_PSIZE(bp));
1767	(void) printf("\tENDIAN: %6s\t\t\t\t\tTYPE:  %s\n",
1768	    BP_GET_BYTEORDER(bp) ? "LITTLE" : "BIG",
1769	    dmu_ot[BP_GET_TYPE(bp)].ot_name);
1770	(void) printf("\tBIRTH:  %-16llx   LEVEL: %-2llu\tFILL:  %llx\n",
1771	    (u_longlong_t)bp->blk_birth, BP_GET_LEVEL(bp),
1772	    (u_longlong_t)bp->blk_fill);
1773	(void) printf("\tCKFUNC: %-16s\t\tCOMP:  %s\n",
1774	    zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name,
1775	    zio_compress_table[BP_GET_COMPRESS(bp)].ci_name);
1776	(void) printf("\tCKSUM:  %llx:%llx:%llx:%llx\n",
1777	    (u_longlong_t)bp->blk_cksum.zc_word[0],
1778	    (u_longlong_t)bp->blk_cksum.zc_word[1],
1779	    (u_longlong_t)bp->blk_cksum.zc_word[2],
1780	    (u_longlong_t)bp->blk_cksum.zc_word[3]);
1781}
1782
1783static void
1784zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
1785{
1786	int i;
1787
1788	for (i = 0; i < nbps; i++)
1789		zdb_print_blkptr(&bp[i], flags);
1790}
1791
1792static void
1793zdb_dump_gbh(void *buf, int flags)
1794{
1795	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
1796}
1797
1798static void
1799zdb_dump_block_raw(void *buf, uint64_t size, int flags)
1800{
1801	if (flags & ZDB_FLAG_BSWAP)
1802		byteswap_uint64_array(buf, size);
1803	(void) write(2, buf, size);
1804}
1805
1806static void
1807zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
1808{
1809	uint64_t *d = (uint64_t *)buf;
1810	int nwords = size / sizeof (uint64_t);
1811	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
1812	int i, j;
1813	char *hdr, *c;
1814
1815
1816	if (do_bswap)
1817		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
1818	else
1819		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
1820
1821	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
1822
1823	for (i = 0; i < nwords; i += 2) {
1824		(void) printf("%06llx:  %016llx  %016llx  ",
1825		    (u_longlong_t)(i * sizeof (uint64_t)),
1826		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
1827		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
1828
1829		c = (char *)&d[i];
1830		for (j = 0; j < 2 * sizeof (uint64_t); j++)
1831			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
1832		(void) printf("\n");
1833	}
1834}
1835
1836/*
1837 * There are two acceptable formats:
1838 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
1839 *	child[.child]*    - For example: 0.1.1
1840 *
1841 * The second form can be used to specify arbitrary vdevs anywhere
1842 * in the heirarchy.  For example, in a pool with a mirror of
1843 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
1844 */
1845static vdev_t *
1846zdb_vdev_lookup(vdev_t *vdev, char *path)
1847{
1848	char *s, *p, *q;
1849	int i;
1850
1851	if (vdev == NULL)
1852		return (NULL);
1853
1854	/* First, assume the x.x.x.x format */
1855	i = (int)strtoul(path, &s, 10);
1856	if (s == path || (s && *s != '.' && *s != '\0'))
1857		goto name;
1858	if (i < 0 || i >= vdev->vdev_children)
1859		return (NULL);
1860
1861	vdev = vdev->vdev_child[i];
1862	if (*s == '\0')
1863		return (vdev);
1864	return (zdb_vdev_lookup(vdev, s+1));
1865
1866name:
1867	for (i = 0; i < vdev->vdev_children; i++) {
1868		vdev_t *vc = vdev->vdev_child[i];
1869
1870		if (vc->vdev_path == NULL) {
1871			vc = zdb_vdev_lookup(vc, path);
1872			if (vc == NULL)
1873				continue;
1874			else
1875				return (vc);
1876		}
1877
1878		p = strrchr(vc->vdev_path, '/');
1879		p = p ? p + 1 : vc->vdev_path;
1880		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
1881
1882		if (strcmp(vc->vdev_path, path) == 0)
1883			return (vc);
1884		if (strcmp(p, path) == 0)
1885			return (vc);
1886		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
1887			return (vc);
1888	}
1889
1890	return (NULL);
1891}
1892
1893/*
1894 * Read a block from a pool and print it out.  The syntax of the
1895 * block descriptor is:
1896 *
1897 *	pool:vdev_specifier:offset:size[:flags]
1898 *
1899 *	pool           - The name of the pool you wish to read from
1900 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
1901 *	offset         - offset, in hex, in bytes
1902 *	size           - Amount of data to read, in hex, in bytes
1903 *	flags          - A string of characters specifying options
1904 *		 b: Decode a blkptr at given offset within block
1905 *		*c: Calculate and display checksums
1906 *		*d: Decompress data before dumping
1907 *		 e: Byteswap data before dumping
1908 *		*g: Display data as a gang block header
1909 *		*i: Display as an indirect block
1910 *		 p: Do I/O to physical offset
1911 *		 r: Dump raw data to stdout
1912 *
1913 *              * = not yet implemented
1914 */
1915static void
1916zdb_read_block(char *thing, spa_t **spap)
1917{
1918	spa_t *spa = *spap;
1919	int flags = 0;
1920	uint64_t offset = 0, size = 0, blkptr_offset = 0;
1921	zio_t *zio;
1922	vdev_t *vd;
1923	void *buf;
1924	char *s, *p, *dup, *spa_name, *vdev, *flagstr;
1925	int i, error, zio_flags;
1926
1927	dup = strdup(thing);
1928	s = strtok(dup, ":");
1929	spa_name = s ? s : "";
1930	s = strtok(NULL, ":");
1931	vdev = s ? s : "";
1932	s = strtok(NULL, ":");
1933	offset = strtoull(s ? s : "", NULL, 16);
1934	s = strtok(NULL, ":");
1935	size = strtoull(s ? s : "", NULL, 16);
1936	s = strtok(NULL, ":");
1937	flagstr = s ? s : "";
1938
1939	s = NULL;
1940	if (size == 0)
1941		s = "size must not be zero";
1942	if (!IS_P2ALIGNED(size, DEV_BSIZE))
1943		s = "size must be a multiple of sector size";
1944	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
1945		s = "offset must be a multiple of sector size";
1946	if (s) {
1947		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
1948		free(dup);
1949		return;
1950	}
1951
1952	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
1953		for (i = 0; flagstr[i]; i++) {
1954			int bit = flagbits[flagstr[i]];
1955
1956			if (bit == 0) {
1957				(void) printf("***Invalid flag: %c\n",
1958				    flagstr[i]);
1959				continue;
1960			}
1961			flags |= bit;
1962
1963			/* If it's not something with an argument, keep going */
1964			if ((bit & (ZDB_FLAG_CHECKSUM | ZDB_FLAG_DECOMPRESS |
1965			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
1966				continue;
1967
1968			p = &flagstr[i + 1];
1969			if (bit == ZDB_FLAG_PRINT_BLKPTR)
1970				blkptr_offset = strtoull(p, &p, 16);
1971			if (*p != ':' && *p != '\0') {
1972				(void) printf("***Invalid flag arg: '%s'\n", s);
1973				free(dup);
1974				return;
1975			}
1976		}
1977	}
1978
1979	if (spa == NULL || spa->spa_name == NULL ||
1980	    strcmp(spa->spa_name, spa_name)) {
1981		if (spa && spa->spa_name)
1982			spa_close(spa, (void *)zdb_read_block);
1983		error = spa_open(spa_name, spap, (void *)zdb_read_block);
1984		if (error)
1985			fatal("Failed to open pool '%s': errno = %d\n",
1986			    spa_name, error);
1987		spa = *spap;
1988	}
1989
1990	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
1991	if (vd == NULL) {
1992		(void) printf("***Invalid vdev: %s\n", vdev);
1993		free(dup);
1994		return;
1995	} else {
1996		if (vd->vdev_path)
1997			(void) printf("Found vdev: %s\n", vd->vdev_path);
1998		else
1999			(void) printf("Found vdev type: %s\n",
2000			    vd->vdev_ops->vdev_op_type);
2001	}
2002
2003	buf = umem_alloc(size, UMEM_NOFAIL);
2004
2005	zio_flags = ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
2006	    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY | ZIO_FLAG_NOBOOKMARK;
2007
2008	if (flags & ZDB_FLAG_PHYS)
2009		zio_flags |= ZIO_FLAG_PHYSICAL;
2010
2011	zio = zio_root(spa, NULL, NULL, 0);
2012	/* XXX todo - cons up a BP so RAID-Z will be happy */
2013	zio_nowait(zio_vdev_child_io(zio, NULL, vd, offset, buf, size,
2014	    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ, zio_flags, NULL, NULL));
2015	error = zio_wait(zio);
2016
2017	if (error) {
2018		(void) printf("Read of %s failed, error: %d\n", thing, error);
2019		goto out;
2020	}
2021
2022	if (flags & ZDB_FLAG_PRINT_BLKPTR)
2023		zdb_print_blkptr((blkptr_t *)(void *)
2024		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
2025	else if (flags & ZDB_FLAG_RAW)
2026		zdb_dump_block_raw(buf, size, flags);
2027	else if (flags & ZDB_FLAG_INDIRECT)
2028		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
2029		    flags);
2030	else if (flags & ZDB_FLAG_GBH)
2031		zdb_dump_gbh(buf, flags);
2032	else
2033		zdb_dump_block(thing, buf, size, flags);
2034
2035out:
2036	umem_free(buf, size);
2037	free(dup);
2038}
2039
2040int
2041main(int argc, char **argv)
2042{
2043	int i, c;
2044	struct rlimit rl = { 1024, 1024 };
2045	spa_t *spa;
2046	objset_t *os = NULL;
2047	char *endstr;
2048	int dump_all = 1;
2049	int verbose = 0;
2050	int error;
2051	int flag, set;
2052	vdev_knob_t *vk;
2053
2054	(void) setrlimit(RLIMIT_NOFILE, &rl);
2055	(void) enable_extended_FILE_stdio(-1, -1);
2056
2057	dprintf_setup(&argc, argv);
2058
2059	while ((c = getopt(argc, argv, "udibcsvCLO:B:UlR")) != -1) {
2060		switch (c) {
2061		case 'u':
2062		case 'd':
2063		case 'i':
2064		case 'b':
2065		case 'c':
2066		case 's':
2067		case 'C':
2068		case 'l':
2069		case 'R':
2070			dump_opt[c]++;
2071			dump_all = 0;
2072			break;
2073		case 'L':
2074			dump_opt[c]++;
2075			break;
2076		case 'O':
2077			endstr = optarg;
2078			if (endstr[0] == '!') {
2079				endstr++;
2080				set = 0;
2081			} else {
2082				set = 1;
2083			}
2084			if (strcmp(endstr, "post") == 0) {
2085				flag = ADVANCE_PRE;
2086				set = !set;
2087			} else if (strcmp(endstr, "pre") == 0) {
2088				flag = ADVANCE_PRE;
2089			} else if (strcmp(endstr, "prune") == 0) {
2090				flag = ADVANCE_PRUNE;
2091			} else if (strcmp(endstr, "data") == 0) {
2092				flag = ADVANCE_DATA;
2093			} else if (strcmp(endstr, "holes") == 0) {
2094				flag = ADVANCE_HOLES;
2095			} else {
2096				usage();
2097			}
2098			if (set)
2099				zdb_advance |= flag;
2100			else
2101				zdb_advance &= ~flag;
2102			break;
2103		case 'B':
2104			endstr = optarg - 1;
2105			zdb_noread.zb_objset = strtoull(endstr + 1, &endstr, 0);
2106			zdb_noread.zb_object = strtoull(endstr + 1, &endstr, 0);
2107			zdb_noread.zb_level = strtol(endstr + 1, &endstr, 0);
2108			zdb_noread.zb_blkid = strtoull(endstr + 1, &endstr, 16);
2109			(void) printf("simulating bad block "
2110			    "<%llu, %llu, %lld, %llx>\n",
2111			    (u_longlong_t)zdb_noread.zb_objset,
2112			    (u_longlong_t)zdb_noread.zb_object,
2113			    (u_longlong_t)zdb_noread.zb_level,
2114			    (u_longlong_t)zdb_noread.zb_blkid);
2115			break;
2116		case 'v':
2117			verbose++;
2118			break;
2119		case 'U':
2120			spa_config_dir = "/tmp";
2121			break;
2122		default:
2123			usage();
2124			break;
2125		}
2126	}
2127
2128	kernel_init(FREAD);
2129
2130	/*
2131	 * Disable vdev caching.  If we don't do this, live pool traversal
2132	 * won't make progress because it will never see disk updates.
2133	 */
2134	for (vk = vdev_knob_next(NULL); vk != NULL; vk = vdev_knob_next(vk)) {
2135		if (strcmp(vk->vk_name, "cache_size") == 0)
2136			vk->vk_default = 0;
2137	}
2138
2139	for (c = 0; c < 256; c++) {
2140		if (dump_all && c != 'L' && c != 'l' && c != 'R')
2141			dump_opt[c] = 1;
2142		if (dump_opt[c])
2143			dump_opt[c] += verbose;
2144	}
2145
2146	argc -= optind;
2147	argv += optind;
2148
2149	if (argc < 1) {
2150		if (dump_opt['C']) {
2151			dump_config(NULL);
2152			return (0);
2153		}
2154		usage();
2155	}
2156
2157	if (dump_opt['l']) {
2158		dump_label(argv[0]);
2159		return (0);
2160	}
2161
2162	if (dump_opt['R']) {
2163		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
2164		flagbits['c'] = ZDB_FLAG_CHECKSUM;
2165		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
2166		flagbits['e'] = ZDB_FLAG_BSWAP;
2167		flagbits['g'] = ZDB_FLAG_GBH;
2168		flagbits['i'] = ZDB_FLAG_INDIRECT;
2169		flagbits['p'] = ZDB_FLAG_PHYS;
2170		flagbits['r'] = ZDB_FLAG_RAW;
2171
2172		spa = NULL;
2173		while (argv[0]) {
2174			zdb_read_block(argv[0], &spa);
2175			argv++;
2176			argc--;
2177		}
2178		if (spa)
2179			spa_close(spa, (void *)zdb_read_block);
2180		return (0);
2181	}
2182
2183	if (dump_opt['C'])
2184		dump_config(argv[0]);
2185
2186	if (strchr(argv[0], '/') != NULL) {
2187		error = dmu_objset_open(argv[0], DMU_OST_ANY,
2188		    DS_MODE_STANDARD | DS_MODE_READONLY, &os);
2189	} else {
2190		error = spa_open(argv[0], &spa, FTAG);
2191	}
2192
2193	if (error)
2194		fatal("can't open %s: error %d", argv[0], error);
2195
2196	argv++;
2197	if (--argc > 0) {
2198		zopt_objects = argc;
2199		zopt_object = calloc(zopt_objects, sizeof (uint64_t));
2200		for (i = 0; i < zopt_objects; i++) {
2201			errno = 0;
2202			zopt_object[i] = strtoull(argv[i], NULL, 0);
2203			if (zopt_object[i] == 0 && errno != 0)
2204				fatal("bad object number %s: %s",
2205				    argv[i], strerror(errno));
2206		}
2207	}
2208
2209	if (os != NULL) {
2210		dump_dir(os);
2211		dmu_objset_close(os);
2212	} else {
2213		dump_zpool(spa);
2214		spa_close(spa, FTAG);
2215	}
2216
2217	kernel_fini();
2218
2219	return (0);
2220}
2221