zdb.c revision 8363e80ae72609660f6090766ca8c2c18aa53f0c
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/*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
25 * Copyright (c) 2014 Integros [integros.com]
26 */
27
28#include <stdio.h>
29#include <unistd.h>
30#include <stdio_ext.h>
31#include <stdlib.h>
32#include <ctype.h>
33#include <sys/zfs_context.h>
34#include <sys/spa.h>
35#include <sys/spa_impl.h>
36#include <sys/dmu.h>
37#include <sys/zap.h>
38#include <sys/fs/zfs.h>
39#include <sys/zfs_znode.h>
40#include <sys/zfs_sa.h>
41#include <sys/sa.h>
42#include <sys/sa_impl.h>
43#include <sys/vdev.h>
44#include <sys/vdev_impl.h>
45#include <sys/metaslab_impl.h>
46#include <sys/dmu_objset.h>
47#include <sys/dsl_dir.h>
48#include <sys/dsl_dataset.h>
49#include <sys/dsl_pool.h>
50#include <sys/dbuf.h>
51#include <sys/zil.h>
52#include <sys/zil_impl.h>
53#include <sys/stat.h>
54#include <sys/resource.h>
55#include <sys/dmu_traverse.h>
56#include <sys/zio_checksum.h>
57#include <sys/zio_compress.h>
58#include <sys/zfs_fuid.h>
59#include <sys/arc.h>
60#include <sys/ddt.h>
61#include <sys/zfeature.h>
62#include <zfs_comutil.h>
63#undef verify
64#include <libzfs.h>
65
66#define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
67	zio_compress_table[(idx)].ci_name : "UNKNOWN")
68#define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
69	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
70#define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
71	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
72	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
73#define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
74	(((idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA) ?	\
75	DMU_OT_ZAP_OTHER : DMU_OT_NUMTYPES))
76
77#ifndef lint
78extern int reference_tracking_enable;
79extern boolean_t zfs_recover;
80extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
81extern int zfs_vdev_async_read_max_active;
82#else
83int reference_tracking_enable;
84boolean_t zfs_recover;
85uint64_t zfs_arc_max, zfs_arc_meta_limit;
86int zfs_vdev_async_read_max_active;
87#endif
88
89const char cmdname[] = "zdb";
90uint8_t dump_opt[256];
91
92typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
93
94extern void dump_intent_log(zilog_t *);
95uint64_t *zopt_object = NULL;
96int zopt_objects = 0;
97libzfs_handle_t *g_zfs;
98uint64_t max_inflight = 1000;
99
100static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
101
102/*
103 * These libumem hooks provide a reasonable set of defaults for the allocator's
104 * debugging facilities.
105 */
106const char *
107_umem_debug_init()
108{
109	return ("default,verbose"); /* $UMEM_DEBUG setting */
110}
111
112const char *
113_umem_logging_init(void)
114{
115	return ("fail,contents"); /* $UMEM_LOGGING setting */
116}
117
118static void
119usage(void)
120{
121	(void) fprintf(stderr,
122	    "Usage: %s [-CumMdibcsDvhLXFPAG] [-t txg] [-e [-p path...]] "
123	    "[-U config] [-I inflight I/Os] [-x dumpdir] [-o var=value] "
124	    "poolname [object...]\n"
125	    "       %s [-divPA] [-e -p path...] [-U config] dataset "
126	    "[object...]\n"
127	    "       %s -mM [-LXFPA] [-t txg] [-e [-p path...]] [-U config] "
128	    "poolname [vdev [metaslab...]]\n"
129	    "       %s -R [-A] [-e [-p path...]] poolname "
130	    "vdev:offset:size[:flags]\n"
131	    "       %s -S [-PA] [-e [-p path...]] [-U config] poolname\n"
132	    "       %s -l [-uA] device\n"
133	    "       %s -C [-A] [-U config]\n\n",
134	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname);
135
136	(void) fprintf(stderr, "    Dataset name must include at least one "
137	    "separator character '/' or '@'\n");
138	(void) fprintf(stderr, "    If dataset name is specified, only that "
139	    "dataset is dumped\n");
140	(void) fprintf(stderr, "    If object numbers are specified, only "
141	    "those objects are dumped\n\n");
142	(void) fprintf(stderr, "    Options to control amount of output:\n");
143	(void) fprintf(stderr, "        -u uberblock\n");
144	(void) fprintf(stderr, "        -d dataset(s)\n");
145	(void) fprintf(stderr, "        -i intent logs\n");
146	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
147	(void) fprintf(stderr, "        -h pool history\n");
148	(void) fprintf(stderr, "        -b block statistics\n");
149	(void) fprintf(stderr, "        -m metaslabs\n");
150	(void) fprintf(stderr, "        -M metaslab groups\n");
151	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
152	    "all data) blocks\n");
153	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
154	(void) fprintf(stderr, "        -D dedup statistics\n");
155	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
156	(void) fprintf(stderr, "        -v verbose (applies to all others)\n");
157	(void) fprintf(stderr, "        -l dump label contents\n");
158	(void) fprintf(stderr, "        -L disable leak tracking (do not "
159	    "load spacemaps)\n");
160	(void) fprintf(stderr, "        -R read and display block from a "
161	    "device\n\n");
162	(void) fprintf(stderr, "    Below options are intended for use "
163	    "with other options:\n");
164	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
165	    "panic recovery (-AA) or both (-AAA)\n");
166	(void) fprintf(stderr, "        -F attempt automatic rewind within "
167	    "safe range of transaction groups\n");
168	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
169	    "cachefile\n");
170	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
171	    "work with dataset)\n");
172	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
173	    "has altroot/not in a cachefile\n");
174	(void) fprintf(stderr, "        -p <path> -- use one or more with "
175	    "-e to specify path to vdev dir\n");
176	(void) fprintf(stderr, "        -x <dumpdir> -- "
177	    "dump all read blocks into specified directory\n");
178	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
179	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
180	    "searching for uberblocks\n");
181	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
182	    "specify the maximum number of "
183	    "checksumming I/Os [default is 200]\n");
184	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
185	    "exiting\n");
186	(void) fprintf(stderr, "        -o <variable>=<value> set global "
187	    "variable to an unsigned 32-bit integer value\n");
188	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
189	    "to make only that option verbose\n");
190	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
191	exit(1);
192}
193
194static void
195dump_debug_buffer()
196{
197	if (dump_opt['G']) {
198		(void) printf("\n");
199		zfs_dbgmsg_print("zdb");
200	}
201}
202
203/*
204 * Called for usage errors that are discovered after a call to spa_open(),
205 * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
206 */
207
208static void
209fatal(const char *fmt, ...)
210{
211	va_list ap;
212
213	va_start(ap, fmt);
214	(void) fprintf(stderr, "%s: ", cmdname);
215	(void) vfprintf(stderr, fmt, ap);
216	va_end(ap);
217	(void) fprintf(stderr, "\n");
218
219	dump_debug_buffer();
220
221	exit(1);
222}
223
224/* ARGSUSED */
225static void
226dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
227{
228	nvlist_t *nv;
229	size_t nvsize = *(uint64_t *)data;
230	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
231
232	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
233
234	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
235
236	umem_free(packed, nvsize);
237
238	dump_nvlist(nv, 8);
239
240	nvlist_free(nv);
241}
242
243/* ARGSUSED */
244static void
245dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
246{
247	spa_history_phys_t *shp = data;
248
249	if (shp == NULL)
250		return;
251
252	(void) printf("\t\tpool_create_len = %llu\n",
253	    (u_longlong_t)shp->sh_pool_create_len);
254	(void) printf("\t\tphys_max_off = %llu\n",
255	    (u_longlong_t)shp->sh_phys_max_off);
256	(void) printf("\t\tbof = %llu\n",
257	    (u_longlong_t)shp->sh_bof);
258	(void) printf("\t\teof = %llu\n",
259	    (u_longlong_t)shp->sh_eof);
260	(void) printf("\t\trecords_lost = %llu\n",
261	    (u_longlong_t)shp->sh_records_lost);
262}
263
264static void
265zdb_nicenum(uint64_t num, char *buf)
266{
267	if (dump_opt['P'])
268		(void) sprintf(buf, "%llu", (longlong_t)num);
269	else
270		nicenum(num, buf);
271}
272
273const char histo_stars[] = "****************************************";
274const int histo_width = sizeof (histo_stars) - 1;
275
276static void
277dump_histogram(const uint64_t *histo, int size, int offset)
278{
279	int i;
280	int minidx = size - 1;
281	int maxidx = 0;
282	uint64_t max = 0;
283
284	for (i = 0; i < size; i++) {
285		if (histo[i] > max)
286			max = histo[i];
287		if (histo[i] > 0 && i > maxidx)
288			maxidx = i;
289		if (histo[i] > 0 && i < minidx)
290			minidx = i;
291	}
292
293	if (max < histo_width)
294		max = histo_width;
295
296	for (i = minidx; i <= maxidx; i++) {
297		(void) printf("\t\t\t%3u: %6llu %s\n",
298		    i + offset, (u_longlong_t)histo[i],
299		    &histo_stars[(max - histo[i]) * histo_width / max]);
300	}
301}
302
303static void
304dump_zap_stats(objset_t *os, uint64_t object)
305{
306	int error;
307	zap_stats_t zs;
308
309	error = zap_get_stats(os, object, &zs);
310	if (error)
311		return;
312
313	if (zs.zs_ptrtbl_len == 0) {
314		ASSERT(zs.zs_num_blocks == 1);
315		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
316		    (u_longlong_t)zs.zs_blocksize,
317		    (u_longlong_t)zs.zs_num_entries);
318		return;
319	}
320
321	(void) printf("\tFat ZAP stats:\n");
322
323	(void) printf("\t\tPointer table:\n");
324	(void) printf("\t\t\t%llu elements\n",
325	    (u_longlong_t)zs.zs_ptrtbl_len);
326	(void) printf("\t\t\tzt_blk: %llu\n",
327	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
328	(void) printf("\t\t\tzt_numblks: %llu\n",
329	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
330	(void) printf("\t\t\tzt_shift: %llu\n",
331	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
332	(void) printf("\t\t\tzt_blks_copied: %llu\n",
333	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
334	(void) printf("\t\t\tzt_nextblk: %llu\n",
335	    (u_longlong_t)zs.zs_ptrtbl_nextblk);
336
337	(void) printf("\t\tZAP entries: %llu\n",
338	    (u_longlong_t)zs.zs_num_entries);
339	(void) printf("\t\tLeaf blocks: %llu\n",
340	    (u_longlong_t)zs.zs_num_leafs);
341	(void) printf("\t\tTotal blocks: %llu\n",
342	    (u_longlong_t)zs.zs_num_blocks);
343	(void) printf("\t\tzap_block_type: 0x%llx\n",
344	    (u_longlong_t)zs.zs_block_type);
345	(void) printf("\t\tzap_magic: 0x%llx\n",
346	    (u_longlong_t)zs.zs_magic);
347	(void) printf("\t\tzap_salt: 0x%llx\n",
348	    (u_longlong_t)zs.zs_salt);
349
350	(void) printf("\t\tLeafs with 2^n pointers:\n");
351	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
352
353	(void) printf("\t\tBlocks with n*5 entries:\n");
354	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
355
356	(void) printf("\t\tBlocks n/10 full:\n");
357	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
358
359	(void) printf("\t\tEntries with n chunks:\n");
360	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
361
362	(void) printf("\t\tBuckets with n entries:\n");
363	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
364}
365
366/*ARGSUSED*/
367static void
368dump_none(objset_t *os, uint64_t object, void *data, size_t size)
369{
370}
371
372/*ARGSUSED*/
373static void
374dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
375{
376	(void) printf("\tUNKNOWN OBJECT TYPE\n");
377}
378
379/*ARGSUSED*/
380void
381dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
382{
383}
384
385/*ARGSUSED*/
386static void
387dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
388{
389}
390
391/*ARGSUSED*/
392static void
393dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
394{
395	zap_cursor_t zc;
396	zap_attribute_t attr;
397	void *prop;
398	int i;
399
400	dump_zap_stats(os, object);
401	(void) printf("\n");
402
403	for (zap_cursor_init(&zc, os, object);
404	    zap_cursor_retrieve(&zc, &attr) == 0;
405	    zap_cursor_advance(&zc)) {
406		(void) printf("\t\t%s = ", attr.za_name);
407		if (attr.za_num_integers == 0) {
408			(void) printf("\n");
409			continue;
410		}
411		prop = umem_zalloc(attr.za_num_integers *
412		    attr.za_integer_length, UMEM_NOFAIL);
413		(void) zap_lookup(os, object, attr.za_name,
414		    attr.za_integer_length, attr.za_num_integers, prop);
415		if (attr.za_integer_length == 1) {
416			(void) printf("%s", (char *)prop);
417		} else {
418			for (i = 0; i < attr.za_num_integers; i++) {
419				switch (attr.za_integer_length) {
420				case 2:
421					(void) printf("%u ",
422					    ((uint16_t *)prop)[i]);
423					break;
424				case 4:
425					(void) printf("%u ",
426					    ((uint32_t *)prop)[i]);
427					break;
428				case 8:
429					(void) printf("%lld ",
430					    (u_longlong_t)((int64_t *)prop)[i]);
431					break;
432				}
433			}
434		}
435		(void) printf("\n");
436		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
437	}
438	zap_cursor_fini(&zc);
439}
440
441static void
442dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
443{
444	bpobj_phys_t *bpop = data;
445	char bytes[32], comp[32], uncomp[32];
446
447	if (bpop == NULL)
448		return;
449
450	zdb_nicenum(bpop->bpo_bytes, bytes);
451	zdb_nicenum(bpop->bpo_comp, comp);
452	zdb_nicenum(bpop->bpo_uncomp, uncomp);
453
454	(void) printf("\t\tnum_blkptrs = %llu\n",
455	    (u_longlong_t)bpop->bpo_num_blkptrs);
456	(void) printf("\t\tbytes = %s\n", bytes);
457	if (size >= BPOBJ_SIZE_V1) {
458		(void) printf("\t\tcomp = %s\n", comp);
459		(void) printf("\t\tuncomp = %s\n", uncomp);
460	}
461	if (size >= sizeof (*bpop)) {
462		(void) printf("\t\tsubobjs = %llu\n",
463		    (u_longlong_t)bpop->bpo_subobjs);
464		(void) printf("\t\tnum_subobjs = %llu\n",
465		    (u_longlong_t)bpop->bpo_num_subobjs);
466	}
467
468	if (dump_opt['d'] < 5)
469		return;
470
471	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
472		char blkbuf[BP_SPRINTF_LEN];
473		blkptr_t bp;
474
475		int err = dmu_read(os, object,
476		    i * sizeof (bp), sizeof (bp), &bp, 0);
477		if (err != 0) {
478			(void) printf("got error %u from dmu_read\n", err);
479			break;
480		}
481		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
482		(void) printf("\t%s\n", blkbuf);
483	}
484}
485
486/* ARGSUSED */
487static void
488dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
489{
490	dmu_object_info_t doi;
491
492	VERIFY0(dmu_object_info(os, object, &doi));
493	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
494
495	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
496	if (err != 0) {
497		(void) printf("got error %u from dmu_read\n", err);
498		kmem_free(subobjs, doi.doi_max_offset);
499		return;
500	}
501
502	int64_t last_nonzero = -1;
503	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
504		if (subobjs[i] != 0)
505			last_nonzero = i;
506	}
507
508	for (int64_t i = 0; i <= last_nonzero; i++) {
509		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
510	}
511	kmem_free(subobjs, doi.doi_max_offset);
512}
513
514/*ARGSUSED*/
515static void
516dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
517{
518	dump_zap_stats(os, object);
519	/* contents are printed elsewhere, properly decoded */
520}
521
522/*ARGSUSED*/
523static void
524dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
525{
526	zap_cursor_t zc;
527	zap_attribute_t attr;
528
529	dump_zap_stats(os, object);
530	(void) printf("\n");
531
532	for (zap_cursor_init(&zc, os, object);
533	    zap_cursor_retrieve(&zc, &attr) == 0;
534	    zap_cursor_advance(&zc)) {
535		(void) printf("\t\t%s = ", attr.za_name);
536		if (attr.za_num_integers == 0) {
537			(void) printf("\n");
538			continue;
539		}
540		(void) printf(" %llx : [%d:%d:%d]\n",
541		    (u_longlong_t)attr.za_first_integer,
542		    (int)ATTR_LENGTH(attr.za_first_integer),
543		    (int)ATTR_BSWAP(attr.za_first_integer),
544		    (int)ATTR_NUM(attr.za_first_integer));
545	}
546	zap_cursor_fini(&zc);
547}
548
549/*ARGSUSED*/
550static void
551dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
552{
553	zap_cursor_t zc;
554	zap_attribute_t attr;
555	uint16_t *layout_attrs;
556	int i;
557
558	dump_zap_stats(os, object);
559	(void) printf("\n");
560
561	for (zap_cursor_init(&zc, os, object);
562	    zap_cursor_retrieve(&zc, &attr) == 0;
563	    zap_cursor_advance(&zc)) {
564		(void) printf("\t\t%s = [", attr.za_name);
565		if (attr.za_num_integers == 0) {
566			(void) printf("\n");
567			continue;
568		}
569
570		VERIFY(attr.za_integer_length == 2);
571		layout_attrs = umem_zalloc(attr.za_num_integers *
572		    attr.za_integer_length, UMEM_NOFAIL);
573
574		VERIFY(zap_lookup(os, object, attr.za_name,
575		    attr.za_integer_length,
576		    attr.za_num_integers, layout_attrs) == 0);
577
578		for (i = 0; i != attr.za_num_integers; i++)
579			(void) printf(" %d ", (int)layout_attrs[i]);
580		(void) printf("]\n");
581		umem_free(layout_attrs,
582		    attr.za_num_integers * attr.za_integer_length);
583	}
584	zap_cursor_fini(&zc);
585}
586
587/*ARGSUSED*/
588static void
589dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
590{
591	zap_cursor_t zc;
592	zap_attribute_t attr;
593	const char *typenames[] = {
594		/* 0 */ "not specified",
595		/* 1 */ "FIFO",
596		/* 2 */ "Character Device",
597		/* 3 */ "3 (invalid)",
598		/* 4 */ "Directory",
599		/* 5 */ "5 (invalid)",
600		/* 6 */ "Block Device",
601		/* 7 */ "7 (invalid)",
602		/* 8 */ "Regular File",
603		/* 9 */ "9 (invalid)",
604		/* 10 */ "Symbolic Link",
605		/* 11 */ "11 (invalid)",
606		/* 12 */ "Socket",
607		/* 13 */ "Door",
608		/* 14 */ "Event Port",
609		/* 15 */ "15 (invalid)",
610	};
611
612	dump_zap_stats(os, object);
613	(void) printf("\n");
614
615	for (zap_cursor_init(&zc, os, object);
616	    zap_cursor_retrieve(&zc, &attr) == 0;
617	    zap_cursor_advance(&zc)) {
618		(void) printf("\t\t%s = %lld (type: %s)\n",
619		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
620		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
621	}
622	zap_cursor_fini(&zc);
623}
624
625int
626get_dtl_refcount(vdev_t *vd)
627{
628	int refcount = 0;
629
630	if (vd->vdev_ops->vdev_op_leaf) {
631		space_map_t *sm = vd->vdev_dtl_sm;
632
633		if (sm != NULL &&
634		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
635			return (1);
636		return (0);
637	}
638
639	for (int c = 0; c < vd->vdev_children; c++)
640		refcount += get_dtl_refcount(vd->vdev_child[c]);
641	return (refcount);
642}
643
644int
645get_metaslab_refcount(vdev_t *vd)
646{
647	int refcount = 0;
648
649	if (vd->vdev_top == vd && !vd->vdev_removing) {
650		for (int m = 0; m < vd->vdev_ms_count; m++) {
651			space_map_t *sm = vd->vdev_ms[m]->ms_sm;
652
653			if (sm != NULL &&
654			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
655				refcount++;
656		}
657	}
658	for (int c = 0; c < vd->vdev_children; c++)
659		refcount += get_metaslab_refcount(vd->vdev_child[c]);
660
661	return (refcount);
662}
663
664static int
665verify_spacemap_refcounts(spa_t *spa)
666{
667	uint64_t expected_refcount = 0;
668	uint64_t actual_refcount;
669
670	(void) feature_get_refcount(spa,
671	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
672	    &expected_refcount);
673	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
674	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
675
676	if (expected_refcount != actual_refcount) {
677		(void) printf("space map refcount mismatch: expected %lld != "
678		    "actual %lld\n",
679		    (longlong_t)expected_refcount,
680		    (longlong_t)actual_refcount);
681		return (2);
682	}
683	return (0);
684}
685
686static void
687dump_spacemap(objset_t *os, space_map_t *sm)
688{
689	uint64_t alloc, offset, entry;
690	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
691			    "INVALID", "INVALID", "INVALID", "INVALID" };
692
693	if (sm == NULL)
694		return;
695
696	/*
697	 * Print out the freelist entries in both encoded and decoded form.
698	 */
699	alloc = 0;
700	for (offset = 0; offset < space_map_length(sm);
701	    offset += sizeof (entry)) {
702		uint8_t mapshift = sm->sm_shift;
703
704		VERIFY0(dmu_read(os, space_map_object(sm), offset,
705		    sizeof (entry), &entry, DMU_READ_PREFETCH));
706		if (SM_DEBUG_DECODE(entry)) {
707
708			(void) printf("\t    [%6llu] %s: txg %llu, pass %llu\n",
709			    (u_longlong_t)(offset / sizeof (entry)),
710			    ddata[SM_DEBUG_ACTION_DECODE(entry)],
711			    (u_longlong_t)SM_DEBUG_TXG_DECODE(entry),
712			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(entry));
713		} else {
714			(void) printf("\t    [%6llu]    %c  range:"
715			    " %010llx-%010llx  size: %06llx\n",
716			    (u_longlong_t)(offset / sizeof (entry)),
717			    SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
718			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
719			    mapshift) + sm->sm_start),
720			    (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
721			    mapshift) + sm->sm_start +
722			    (SM_RUN_DECODE(entry) << mapshift)),
723			    (u_longlong_t)(SM_RUN_DECODE(entry) << mapshift));
724			if (SM_TYPE_DECODE(entry) == SM_ALLOC)
725				alloc += SM_RUN_DECODE(entry) << mapshift;
726			else
727				alloc -= SM_RUN_DECODE(entry) << mapshift;
728		}
729	}
730	if (alloc != space_map_allocated(sm)) {
731		(void) printf("space_map_object alloc (%llu) INCONSISTENT "
732		    "with space map summary (%llu)\n",
733		    (u_longlong_t)space_map_allocated(sm), (u_longlong_t)alloc);
734	}
735}
736
737static void
738dump_metaslab_stats(metaslab_t *msp)
739{
740	char maxbuf[32];
741	range_tree_t *rt = msp->ms_tree;
742	avl_tree_t *t = &msp->ms_size_tree;
743	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
744
745	zdb_nicenum(metaslab_block_maxsize(msp), maxbuf);
746
747	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
748	    "segments", avl_numnodes(t), "maxsize", maxbuf,
749	    "freepct", free_pct);
750	(void) printf("\tIn-memory histogram:\n");
751	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
752}
753
754static void
755dump_metaslab(metaslab_t *msp)
756{
757	vdev_t *vd = msp->ms_group->mg_vd;
758	spa_t *spa = vd->vdev_spa;
759	space_map_t *sm = msp->ms_sm;
760	char freebuf[32];
761
762	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf);
763
764	(void) printf(
765	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
766	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
767	    (u_longlong_t)space_map_object(sm), freebuf);
768
769	if (dump_opt['m'] > 2 && !dump_opt['L']) {
770		mutex_enter(&msp->ms_lock);
771		metaslab_load_wait(msp);
772		if (!msp->ms_loaded) {
773			VERIFY0(metaslab_load(msp));
774			range_tree_stat_verify(msp->ms_tree);
775		}
776		dump_metaslab_stats(msp);
777		metaslab_unload(msp);
778		mutex_exit(&msp->ms_lock);
779	}
780
781	if (dump_opt['m'] > 1 && sm != NULL &&
782	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
783		/*
784		 * The space map histogram represents free space in chunks
785		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
786		 */
787		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
788		    (u_longlong_t)msp->ms_fragmentation);
789		dump_histogram(sm->sm_phys->smp_histogram,
790		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
791	}
792
793	if (dump_opt['d'] > 5 || dump_opt['m'] > 3) {
794		ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
795
796		mutex_enter(&msp->ms_lock);
797		dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
798		mutex_exit(&msp->ms_lock);
799	}
800}
801
802static void
803print_vdev_metaslab_header(vdev_t *vd)
804{
805	(void) printf("\tvdev %10llu\n\t%-10s%5llu   %-19s   %-15s   %-10s\n",
806	    (u_longlong_t)vd->vdev_id,
807	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
808	    "offset", "spacemap", "free");
809	(void) printf("\t%15s   %19s   %15s   %10s\n",
810	    "---------------", "-------------------",
811	    "---------------", "-------------");
812}
813
814static void
815dump_metaslab_groups(spa_t *spa)
816{
817	vdev_t *rvd = spa->spa_root_vdev;
818	metaslab_class_t *mc = spa_normal_class(spa);
819	uint64_t fragmentation;
820
821	metaslab_class_histogram_verify(mc);
822
823	for (int c = 0; c < rvd->vdev_children; c++) {
824		vdev_t *tvd = rvd->vdev_child[c];
825		metaslab_group_t *mg = tvd->vdev_mg;
826
827		if (mg->mg_class != mc)
828			continue;
829
830		metaslab_group_histogram_verify(mg);
831		mg->mg_fragmentation = metaslab_group_fragmentation(mg);
832
833		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
834		    "fragmentation",
835		    (u_longlong_t)tvd->vdev_id,
836		    (u_longlong_t)tvd->vdev_ms_count);
837		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
838			(void) printf("%3s\n", "-");
839		} else {
840			(void) printf("%3llu%%\n",
841			    (u_longlong_t)mg->mg_fragmentation);
842		}
843		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
844	}
845
846	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
847	fragmentation = metaslab_class_fragmentation(mc);
848	if (fragmentation == ZFS_FRAG_INVALID)
849		(void) printf("\t%3s\n", "-");
850	else
851		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
852	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
853}
854
855static void
856dump_metaslabs(spa_t *spa)
857{
858	vdev_t *vd, *rvd = spa->spa_root_vdev;
859	uint64_t m, c = 0, children = rvd->vdev_children;
860
861	(void) printf("\nMetaslabs:\n");
862
863	if (!dump_opt['d'] && zopt_objects > 0) {
864		c = zopt_object[0];
865
866		if (c >= children)
867			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);
868
869		if (zopt_objects > 1) {
870			vd = rvd->vdev_child[c];
871			print_vdev_metaslab_header(vd);
872
873			for (m = 1; m < zopt_objects; m++) {
874				if (zopt_object[m] < vd->vdev_ms_count)
875					dump_metaslab(
876					    vd->vdev_ms[zopt_object[m]]);
877				else
878					(void) fprintf(stderr, "bad metaslab "
879					    "number %llu\n",
880					    (u_longlong_t)zopt_object[m]);
881			}
882			(void) printf("\n");
883			return;
884		}
885		children = c + 1;
886	}
887	for (; c < children; c++) {
888		vd = rvd->vdev_child[c];
889		print_vdev_metaslab_header(vd);
890
891		for (m = 0; m < vd->vdev_ms_count; m++)
892			dump_metaslab(vd->vdev_ms[m]);
893		(void) printf("\n");
894	}
895}
896
897static void
898dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
899{
900	const ddt_phys_t *ddp = dde->dde_phys;
901	const ddt_key_t *ddk = &dde->dde_key;
902	char *types[4] = { "ditto", "single", "double", "triple" };
903	char blkbuf[BP_SPRINTF_LEN];
904	blkptr_t blk;
905
906	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
907		if (ddp->ddp_phys_birth == 0)
908			continue;
909		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
910		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
911		(void) printf("index %llx refcnt %llu %s %s\n",
912		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
913		    types[p], blkbuf);
914	}
915}
916
917static void
918dump_dedup_ratio(const ddt_stat_t *dds)
919{
920	double rL, rP, rD, D, dedup, compress, copies;
921
922	if (dds->dds_blocks == 0)
923		return;
924
925	rL = (double)dds->dds_ref_lsize;
926	rP = (double)dds->dds_ref_psize;
927	rD = (double)dds->dds_ref_dsize;
928	D = (double)dds->dds_dsize;
929
930	dedup = rD / D;
931	compress = rL / rP;
932	copies = rD / rP;
933
934	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
935	    "dedup * compress / copies = %.2f\n\n",
936	    dedup, compress, copies, dedup * compress / copies);
937}
938
939static void
940dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
941{
942	char name[DDT_NAMELEN];
943	ddt_entry_t dde;
944	uint64_t walk = 0;
945	dmu_object_info_t doi;
946	uint64_t count, dspace, mspace;
947	int error;
948
949	error = ddt_object_info(ddt, type, class, &doi);
950
951	if (error == ENOENT)
952		return;
953	ASSERT(error == 0);
954
955	if ((count = ddt_object_count(ddt, type, class)) == 0)
956		return;
957
958	dspace = doi.doi_physical_blocks_512 << 9;
959	mspace = doi.doi_fill_count * doi.doi_data_block_size;
960
961	ddt_object_name(ddt, type, class, name);
962
963	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
964	    name,
965	    (u_longlong_t)count,
966	    (u_longlong_t)(dspace / count),
967	    (u_longlong_t)(mspace / count));
968
969	if (dump_opt['D'] < 3)
970		return;
971
972	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
973
974	if (dump_opt['D'] < 4)
975		return;
976
977	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
978		return;
979
980	(void) printf("%s contents:\n\n", name);
981
982	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
983		dump_dde(ddt, &dde, walk);
984
985	ASSERT(error == ENOENT);
986
987	(void) printf("\n");
988}
989
990static void
991dump_all_ddts(spa_t *spa)
992{
993	ddt_histogram_t ddh_total = { 0 };
994	ddt_stat_t dds_total = { 0 };
995
996	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
997		ddt_t *ddt = spa->spa_ddt[c];
998		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
999			for (enum ddt_class class = 0; class < DDT_CLASSES;
1000			    class++) {
1001				dump_ddt(ddt, type, class);
1002			}
1003		}
1004	}
1005
1006	ddt_get_dedup_stats(spa, &dds_total);
1007
1008	if (dds_total.dds_blocks == 0) {
1009		(void) printf("All DDTs are empty\n");
1010		return;
1011	}
1012
1013	(void) printf("\n");
1014
1015	if (dump_opt['D'] > 1) {
1016		(void) printf("DDT histogram (aggregated over all DDTs):\n");
1017		ddt_get_dedup_histogram(spa, &ddh_total);
1018		zpool_dump_ddt(&dds_total, &ddh_total);
1019	}
1020
1021	dump_dedup_ratio(&dds_total);
1022}
1023
1024static void
1025dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1026{
1027	char *prefix = arg;
1028
1029	(void) printf("%s [%llu,%llu) length %llu\n",
1030	    prefix,
1031	    (u_longlong_t)start,
1032	    (u_longlong_t)(start + size),
1033	    (u_longlong_t)(size));
1034}
1035
1036static void
1037dump_dtl(vdev_t *vd, int indent)
1038{
1039	spa_t *spa = vd->vdev_spa;
1040	boolean_t required;
1041	char *name[DTL_TYPES] = { "missing", "partial", "scrub", "outage" };
1042	char prefix[256];
1043
1044	spa_vdev_state_enter(spa, SCL_NONE);
1045	required = vdev_dtl_required(vd);
1046	(void) spa_vdev_state_exit(spa, NULL, 0);
1047
1048	if (indent == 0)
1049		(void) printf("\nDirty time logs:\n\n");
1050
1051	(void) printf("\t%*s%s [%s]\n", indent, "",
1052	    vd->vdev_path ? vd->vdev_path :
1053	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1054	    required ? "DTL-required" : "DTL-expendable");
1055
1056	for (int t = 0; t < DTL_TYPES; t++) {
1057		range_tree_t *rt = vd->vdev_dtl[t];
1058		if (range_tree_space(rt) == 0)
1059			continue;
1060		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1061		    indent + 2, "", name[t]);
1062		mutex_enter(rt->rt_lock);
1063		range_tree_walk(rt, dump_dtl_seg, prefix);
1064		mutex_exit(rt->rt_lock);
1065		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1066			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1067	}
1068
1069	for (int c = 0; c < vd->vdev_children; c++)
1070		dump_dtl(vd->vdev_child[c], indent + 4);
1071}
1072
1073static void
1074dump_history(spa_t *spa)
1075{
1076	nvlist_t **events = NULL;
1077	uint64_t resid, len, off = 0;
1078	uint_t num = 0;
1079	int error;
1080	time_t tsec;
1081	struct tm t;
1082	char tbuf[30];
1083	char internalstr[MAXPATHLEN];
1084
1085	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
1086	do {
1087		len = SPA_MAXBLOCKSIZE;
1088
1089		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1090			(void) fprintf(stderr, "Unable to read history: "
1091			    "error %d\n", error);
1092			umem_free(buf, SPA_MAXBLOCKSIZE);
1093			return;
1094		}
1095
1096		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1097			break;
1098
1099		off -= resid;
1100	} while (len != 0);
1101	umem_free(buf, SPA_MAXBLOCKSIZE);
1102
1103	(void) printf("\nHistory:\n");
1104	for (int i = 0; i < num; i++) {
1105		uint64_t time, txg, ievent;
1106		char *cmd, *intstr;
1107		boolean_t printed = B_FALSE;
1108
1109		if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1110		    &time) != 0)
1111			goto next;
1112		if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1113		    &cmd) != 0) {
1114			if (nvlist_lookup_uint64(events[i],
1115			    ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1116				goto next;
1117			verify(nvlist_lookup_uint64(events[i],
1118			    ZPOOL_HIST_TXG, &txg) == 0);
1119			verify(nvlist_lookup_string(events[i],
1120			    ZPOOL_HIST_INT_STR, &intstr) == 0);
1121			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1122				goto next;
1123
1124			(void) snprintf(internalstr,
1125			    sizeof (internalstr),
1126			    "[internal %s txg:%lld] %s",
1127			    zfs_history_event_names[ievent], txg,
1128			    intstr);
1129			cmd = internalstr;
1130		}
1131		tsec = time;
1132		(void) localtime_r(&tsec, &t);
1133		(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1134		(void) printf("%s %s\n", tbuf, cmd);
1135		printed = B_TRUE;
1136
1137next:
1138		if (dump_opt['h'] > 1) {
1139			if (!printed)
1140				(void) printf("unrecognized record:\n");
1141			dump_nvlist(events[i], 2);
1142		}
1143	}
1144}
1145
1146/*ARGSUSED*/
1147static void
1148dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1149{
1150}
1151
1152static uint64_t
1153blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1154    const zbookmark_phys_t *zb)
1155{
1156	if (dnp == NULL) {
1157		ASSERT(zb->zb_level < 0);
1158		if (zb->zb_object == 0)
1159			return (zb->zb_blkid);
1160		return (zb->zb_blkid * BP_GET_LSIZE(bp));
1161	}
1162
1163	ASSERT(zb->zb_level >= 0);
1164
1165	return ((zb->zb_blkid <<
1166	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1167	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1168}
1169
1170static void
1171snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1172{
1173	const dva_t *dva = bp->blk_dva;
1174	int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1175
1176	if (dump_opt['b'] >= 6) {
1177		snprintf_blkptr(blkbuf, buflen, bp);
1178		return;
1179	}
1180
1181	if (BP_IS_EMBEDDED(bp)) {
1182		(void) sprintf(blkbuf,
1183		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
1184		    (int)BPE_GET_ETYPE(bp),
1185		    (u_longlong_t)BPE_GET_LSIZE(bp),
1186		    (u_longlong_t)BPE_GET_PSIZE(bp),
1187		    (u_longlong_t)bp->blk_birth);
1188		return;
1189	}
1190
1191	blkbuf[0] = '\0';
1192	for (int i = 0; i < ndvas; i++)
1193		(void) snprintf(blkbuf + strlen(blkbuf),
1194		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1195		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1196		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1197		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1198
1199	if (BP_IS_HOLE(bp)) {
1200		(void) snprintf(blkbuf + strlen(blkbuf),
1201		    buflen - strlen(blkbuf),
1202		    "%llxL B=%llu",
1203		    (u_longlong_t)BP_GET_LSIZE(bp),
1204		    (u_longlong_t)bp->blk_birth);
1205	} else {
1206		(void) snprintf(blkbuf + strlen(blkbuf),
1207		    buflen - strlen(blkbuf),
1208		    "%llxL/%llxP F=%llu B=%llu/%llu",
1209		    (u_longlong_t)BP_GET_LSIZE(bp),
1210		    (u_longlong_t)BP_GET_PSIZE(bp),
1211		    (u_longlong_t)BP_GET_FILL(bp),
1212		    (u_longlong_t)bp->blk_birth,
1213		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1214	}
1215}
1216
1217static void
1218print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1219    const dnode_phys_t *dnp)
1220{
1221	char blkbuf[BP_SPRINTF_LEN];
1222	int l;
1223
1224	if (!BP_IS_EMBEDDED(bp)) {
1225		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1226		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1227	}
1228
1229	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1230
1231	ASSERT(zb->zb_level >= 0);
1232
1233	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1234		if (l == zb->zb_level) {
1235			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
1236		} else {
1237			(void) printf(" ");
1238		}
1239	}
1240
1241	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1242	(void) printf("%s\n", blkbuf);
1243}
1244
1245static int
1246visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1247    blkptr_t *bp, const zbookmark_phys_t *zb)
1248{
1249	int err = 0;
1250
1251	if (bp->blk_birth == 0)
1252		return (0);
1253
1254	print_indirect(bp, zb, dnp);
1255
1256	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1257		arc_flags_t flags = ARC_FLAG_WAIT;
1258		int i;
1259		blkptr_t *cbp;
1260		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1261		arc_buf_t *buf;
1262		uint64_t fill = 0;
1263
1264		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1265		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1266		if (err)
1267			return (err);
1268		ASSERT(buf->b_data);
1269
1270		/* recursively visit blocks below this */
1271		cbp = buf->b_data;
1272		for (i = 0; i < epb; i++, cbp++) {
1273			zbookmark_phys_t czb;
1274
1275			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1276			    zb->zb_level - 1,
1277			    zb->zb_blkid * epb + i);
1278			err = visit_indirect(spa, dnp, cbp, &czb);
1279			if (err)
1280				break;
1281			fill += BP_GET_FILL(cbp);
1282		}
1283		if (!err)
1284			ASSERT3U(fill, ==, BP_GET_FILL(bp));
1285		arc_buf_destroy(buf, &buf);
1286	}
1287
1288	return (err);
1289}
1290
1291/*ARGSUSED*/
1292static void
1293dump_indirect(dnode_t *dn)
1294{
1295	dnode_phys_t *dnp = dn->dn_phys;
1296	int j;
1297	zbookmark_phys_t czb;
1298
1299	(void) printf("Indirect blocks:\n");
1300
1301	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1302	    dn->dn_object, dnp->dn_nlevels - 1, 0);
1303	for (j = 0; j < dnp->dn_nblkptr; j++) {
1304		czb.zb_blkid = j;
1305		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1306		    &dnp->dn_blkptr[j], &czb);
1307	}
1308
1309	(void) printf("\n");
1310}
1311
1312/*ARGSUSED*/
1313static void
1314dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1315{
1316	dsl_dir_phys_t *dd = data;
1317	time_t crtime;
1318	char nice[32];
1319
1320	if (dd == NULL)
1321		return;
1322
1323	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1324
1325	crtime = dd->dd_creation_time;
1326	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1327	(void) printf("\t\thead_dataset_obj = %llu\n",
1328	    (u_longlong_t)dd->dd_head_dataset_obj);
1329	(void) printf("\t\tparent_dir_obj = %llu\n",
1330	    (u_longlong_t)dd->dd_parent_obj);
1331	(void) printf("\t\torigin_obj = %llu\n",
1332	    (u_longlong_t)dd->dd_origin_obj);
1333	(void) printf("\t\tchild_dir_zapobj = %llu\n",
1334	    (u_longlong_t)dd->dd_child_dir_zapobj);
1335	zdb_nicenum(dd->dd_used_bytes, nice);
1336	(void) printf("\t\tused_bytes = %s\n", nice);
1337	zdb_nicenum(dd->dd_compressed_bytes, nice);
1338	(void) printf("\t\tcompressed_bytes = %s\n", nice);
1339	zdb_nicenum(dd->dd_uncompressed_bytes, nice);
1340	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
1341	zdb_nicenum(dd->dd_quota, nice);
1342	(void) printf("\t\tquota = %s\n", nice);
1343	zdb_nicenum(dd->dd_reserved, nice);
1344	(void) printf("\t\treserved = %s\n", nice);
1345	(void) printf("\t\tprops_zapobj = %llu\n",
1346	    (u_longlong_t)dd->dd_props_zapobj);
1347	(void) printf("\t\tdeleg_zapobj = %llu\n",
1348	    (u_longlong_t)dd->dd_deleg_zapobj);
1349	(void) printf("\t\tflags = %llx\n",
1350	    (u_longlong_t)dd->dd_flags);
1351
1352#define	DO(which) \
1353	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice); \
1354	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1355	DO(HEAD);
1356	DO(SNAP);
1357	DO(CHILD);
1358	DO(CHILD_RSRV);
1359	DO(REFRSRV);
1360#undef DO
1361}
1362
1363/*ARGSUSED*/
1364static void
1365dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1366{
1367	dsl_dataset_phys_t *ds = data;
1368	time_t crtime;
1369	char used[32], compressed[32], uncompressed[32], unique[32];
1370	char blkbuf[BP_SPRINTF_LEN];
1371
1372	if (ds == NULL)
1373		return;
1374
1375	ASSERT(size == sizeof (*ds));
1376	crtime = ds->ds_creation_time;
1377	zdb_nicenum(ds->ds_referenced_bytes, used);
1378	zdb_nicenum(ds->ds_compressed_bytes, compressed);
1379	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed);
1380	zdb_nicenum(ds->ds_unique_bytes, unique);
1381	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1382
1383	(void) printf("\t\tdir_obj = %llu\n",
1384	    (u_longlong_t)ds->ds_dir_obj);
1385	(void) printf("\t\tprev_snap_obj = %llu\n",
1386	    (u_longlong_t)ds->ds_prev_snap_obj);
1387	(void) printf("\t\tprev_snap_txg = %llu\n",
1388	    (u_longlong_t)ds->ds_prev_snap_txg);
1389	(void) printf("\t\tnext_snap_obj = %llu\n",
1390	    (u_longlong_t)ds->ds_next_snap_obj);
1391	(void) printf("\t\tsnapnames_zapobj = %llu\n",
1392	    (u_longlong_t)ds->ds_snapnames_zapobj);
1393	(void) printf("\t\tnum_children = %llu\n",
1394	    (u_longlong_t)ds->ds_num_children);
1395	(void) printf("\t\tuserrefs_obj = %llu\n",
1396	    (u_longlong_t)ds->ds_userrefs_obj);
1397	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
1398	(void) printf("\t\tcreation_txg = %llu\n",
1399	    (u_longlong_t)ds->ds_creation_txg);
1400	(void) printf("\t\tdeadlist_obj = %llu\n",
1401	    (u_longlong_t)ds->ds_deadlist_obj);
1402	(void) printf("\t\tused_bytes = %s\n", used);
1403	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
1404	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1405	(void) printf("\t\tunique = %s\n", unique);
1406	(void) printf("\t\tfsid_guid = %llu\n",
1407	    (u_longlong_t)ds->ds_fsid_guid);
1408	(void) printf("\t\tguid = %llu\n",
1409	    (u_longlong_t)ds->ds_guid);
1410	(void) printf("\t\tflags = %llx\n",
1411	    (u_longlong_t)ds->ds_flags);
1412	(void) printf("\t\tnext_clones_obj = %llu\n",
1413	    (u_longlong_t)ds->ds_next_clones_obj);
1414	(void) printf("\t\tprops_obj = %llu\n",
1415	    (u_longlong_t)ds->ds_props_obj);
1416	(void) printf("\t\tbp = %s\n", blkbuf);
1417}
1418
1419/* ARGSUSED */
1420static int
1421dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1422{
1423	char blkbuf[BP_SPRINTF_LEN];
1424
1425	if (bp->blk_birth != 0) {
1426		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1427		(void) printf("\t%s\n", blkbuf);
1428	}
1429	return (0);
1430}
1431
1432static void
1433dump_bptree(objset_t *os, uint64_t obj, char *name)
1434{
1435	char bytes[32];
1436	bptree_phys_t *bt;
1437	dmu_buf_t *db;
1438
1439	if (dump_opt['d'] < 3)
1440		return;
1441
1442	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1443	bt = db->db_data;
1444	zdb_nicenum(bt->bt_bytes, bytes);
1445	(void) printf("\n    %s: %llu datasets, %s\n",
1446	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1447	dmu_buf_rele(db, FTAG);
1448
1449	if (dump_opt['d'] < 5)
1450		return;
1451
1452	(void) printf("\n");
1453
1454	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1455}
1456
1457/* ARGSUSED */
1458static int
1459dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1460{
1461	char blkbuf[BP_SPRINTF_LEN];
1462
1463	ASSERT(bp->blk_birth != 0);
1464	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1465	(void) printf("\t%s\n", blkbuf);
1466	return (0);
1467}
1468
1469static void
1470dump_full_bpobj(bpobj_t *bpo, char *name, int indent)
1471{
1472	char bytes[32];
1473	char comp[32];
1474	char uncomp[32];
1475
1476	if (dump_opt['d'] < 3)
1477		return;
1478
1479	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes);
1480	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1481		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp);
1482		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp);
1483		(void) printf("    %*s: object %llu, %llu local blkptrs, "
1484		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1485		    indent * 8, name,
1486		    (u_longlong_t)bpo->bpo_object,
1487		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1488		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1489		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1490		    bytes, comp, uncomp);
1491
1492		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1493			uint64_t subobj;
1494			bpobj_t subbpo;
1495			int error;
1496			VERIFY0(dmu_read(bpo->bpo_os,
1497			    bpo->bpo_phys->bpo_subobjs,
1498			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1499			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1500			if (error != 0) {
1501				(void) printf("ERROR %u while trying to open "
1502				    "subobj id %llu\n",
1503				    error, (u_longlong_t)subobj);
1504				continue;
1505			}
1506			dump_full_bpobj(&subbpo, "subobj", indent + 1);
1507			bpobj_close(&subbpo);
1508		}
1509	} else {
1510		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1511		    indent * 8, name,
1512		    (u_longlong_t)bpo->bpo_object,
1513		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1514		    bytes);
1515	}
1516
1517	if (dump_opt['d'] < 5)
1518		return;
1519
1520
1521	if (indent == 0) {
1522		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1523		(void) printf("\n");
1524	}
1525}
1526
1527static void
1528dump_deadlist(dsl_deadlist_t *dl)
1529{
1530	dsl_deadlist_entry_t *dle;
1531	uint64_t unused;
1532	char bytes[32];
1533	char comp[32];
1534	char uncomp[32];
1535
1536	if (dump_opt['d'] < 3)
1537		return;
1538
1539	if (dl->dl_oldfmt) {
1540		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1541		return;
1542	}
1543
1544	zdb_nicenum(dl->dl_phys->dl_used, bytes);
1545	zdb_nicenum(dl->dl_phys->dl_comp, comp);
1546	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp);
1547	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1548	    bytes, comp, uncomp);
1549
1550	if (dump_opt['d'] < 4)
1551		return;
1552
1553	(void) printf("\n");
1554
1555	/* force the tree to be loaded */
1556	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1557
1558	for (dle = avl_first(&dl->dl_tree); dle;
1559	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
1560		if (dump_opt['d'] >= 5) {
1561			char buf[128];
1562			(void) snprintf(buf, sizeof (buf), "mintxg %llu -> ",
1563			    (longlong_t)dle->dle_mintxg,
1564			    (longlong_t)dle->dle_bpobj.bpo_object);
1565
1566			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1567		} else {
1568			(void) printf("mintxg %llu -> obj %llu\n",
1569			    (longlong_t)dle->dle_mintxg,
1570			    (longlong_t)dle->dle_bpobj.bpo_object);
1571
1572		}
1573	}
1574}
1575
1576static avl_tree_t idx_tree;
1577static avl_tree_t domain_tree;
1578static boolean_t fuid_table_loaded;
1579static boolean_t sa_loaded;
1580sa_attr_type_t *sa_attr_table;
1581
1582static void
1583fuid_table_destroy()
1584{
1585	if (fuid_table_loaded) {
1586		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1587		fuid_table_loaded = B_FALSE;
1588	}
1589}
1590
1591/*
1592 * print uid or gid information.
1593 * For normal POSIX id just the id is printed in decimal format.
1594 * For CIFS files with FUID the fuid is printed in hex followed by
1595 * the domain-rid string.
1596 */
1597static void
1598print_idstr(uint64_t id, const char *id_type)
1599{
1600	if (FUID_INDEX(id)) {
1601		char *domain;
1602
1603		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1604		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
1605		    (u_longlong_t)id, domain, (int)FUID_RID(id));
1606	} else {
1607		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1608	}
1609
1610}
1611
1612static void
1613dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1614{
1615	uint32_t uid_idx, gid_idx;
1616
1617	uid_idx = FUID_INDEX(uid);
1618	gid_idx = FUID_INDEX(gid);
1619
1620	/* Load domain table, if not already loaded */
1621	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1622		uint64_t fuid_obj;
1623
1624		/* first find the fuid object.  It lives in the master node */
1625		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1626		    8, 1, &fuid_obj) == 0);
1627		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1628		(void) zfs_fuid_table_load(os, fuid_obj,
1629		    &idx_tree, &domain_tree);
1630		fuid_table_loaded = B_TRUE;
1631	}
1632
1633	print_idstr(uid, "uid");
1634	print_idstr(gid, "gid");
1635}
1636
1637/*ARGSUSED*/
1638static void
1639dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1640{
1641	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
1642	sa_handle_t *hdl;
1643	uint64_t xattr, rdev, gen;
1644	uint64_t uid, gid, mode, fsize, parent, links;
1645	uint64_t pflags;
1646	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1647	time_t z_crtime, z_atime, z_mtime, z_ctime;
1648	sa_bulk_attr_t bulk[12];
1649	int idx = 0;
1650	int error;
1651
1652	if (!sa_loaded) {
1653		uint64_t sa_attrs = 0;
1654		uint64_t version;
1655
1656		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1657		    8, 1, &version) == 0);
1658		if (version >= ZPL_VERSION_SA) {
1659			VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1660			    8, 1, &sa_attrs) == 0);
1661		}
1662		if ((error = sa_setup(os, sa_attrs, zfs_attr_table,
1663		    ZPL_END, &sa_attr_table)) != 0) {
1664			(void) printf("sa_setup failed errno %d, can't "
1665			    "display znode contents\n", error);
1666			return;
1667		}
1668		sa_loaded = B_TRUE;
1669	}
1670
1671	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1672		(void) printf("Failed to get handle for SA znode\n");
1673		return;
1674	}
1675
1676	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1677	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1678	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1679	    &links, 8);
1680	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1681	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1682	    &mode, 8);
1683	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1684	    NULL, &parent, 8);
1685	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
1686	    &fsize, 8);
1687	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
1688	    acctm, 16);
1689	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
1690	    modtm, 16);
1691	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
1692	    crtm, 16);
1693	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
1694	    chgtm, 16);
1695	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
1696	    &pflags, 8);
1697
1698	if (sa_bulk_lookup(hdl, bulk, idx)) {
1699		(void) sa_handle_destroy(hdl);
1700		return;
1701	}
1702
1703	error = zfs_obj_to_path(os, object, path, sizeof (path));
1704	if (error != 0) {
1705		(void) snprintf(path, sizeof (path), "\?\?\?<object#%llu>",
1706		    (u_longlong_t)object);
1707	}
1708	if (dump_opt['d'] < 3) {
1709		(void) printf("\t%s\n", path);
1710		(void) sa_handle_destroy(hdl);
1711		return;
1712	}
1713
1714	z_crtime = (time_t)crtm[0];
1715	z_atime = (time_t)acctm[0];
1716	z_mtime = (time_t)modtm[0];
1717	z_ctime = (time_t)chgtm[0];
1718
1719	(void) printf("\tpath	%s\n", path);
1720	dump_uidgid(os, uid, gid);
1721	(void) printf("\tatime	%s", ctime(&z_atime));
1722	(void) printf("\tmtime	%s", ctime(&z_mtime));
1723	(void) printf("\tctime	%s", ctime(&z_ctime));
1724	(void) printf("\tcrtime	%s", ctime(&z_crtime));
1725	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
1726	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
1727	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
1728	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
1729	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
1730	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
1731	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
1732	    sizeof (uint64_t)) == 0)
1733		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
1734	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
1735	    sizeof (uint64_t)) == 0)
1736		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
1737	sa_handle_destroy(hdl);
1738}
1739
1740/*ARGSUSED*/
1741static void
1742dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
1743{
1744}
1745
1746/*ARGSUSED*/
1747static void
1748dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
1749{
1750}
1751
1752static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
1753	dump_none,		/* unallocated			*/
1754	dump_zap,		/* object directory		*/
1755	dump_uint64,		/* object array			*/
1756	dump_none,		/* packed nvlist		*/
1757	dump_packed_nvlist,	/* packed nvlist size		*/
1758	dump_none,		/* bpobj			*/
1759	dump_bpobj,		/* bpobj header			*/
1760	dump_none,		/* SPA space map header		*/
1761	dump_none,		/* SPA space map		*/
1762	dump_none,		/* ZIL intent log		*/
1763	dump_dnode,		/* DMU dnode			*/
1764	dump_dmu_objset,	/* DMU objset			*/
1765	dump_dsl_dir,		/* DSL directory		*/
1766	dump_zap,		/* DSL directory child map	*/
1767	dump_zap,		/* DSL dataset snap map		*/
1768	dump_zap,		/* DSL props			*/
1769	dump_dsl_dataset,	/* DSL dataset			*/
1770	dump_znode,		/* ZFS znode			*/
1771	dump_acl,		/* ZFS V0 ACL			*/
1772	dump_uint8,		/* ZFS plain file		*/
1773	dump_zpldir,		/* ZFS directory		*/
1774	dump_zap,		/* ZFS master node		*/
1775	dump_zap,		/* ZFS delete queue		*/
1776	dump_uint8,		/* zvol object			*/
1777	dump_zap,		/* zvol prop			*/
1778	dump_uint8,		/* other uint8[]		*/
1779	dump_uint64,		/* other uint64[]		*/
1780	dump_zap,		/* other ZAP			*/
1781	dump_zap,		/* persistent error log		*/
1782	dump_uint8,		/* SPA history			*/
1783	dump_history_offsets,	/* SPA history offsets		*/
1784	dump_zap,		/* Pool properties		*/
1785	dump_zap,		/* DSL permissions		*/
1786	dump_acl,		/* ZFS ACL			*/
1787	dump_uint8,		/* ZFS SYSACL			*/
1788	dump_none,		/* FUID nvlist			*/
1789	dump_packed_nvlist,	/* FUID nvlist size		*/
1790	dump_zap,		/* DSL dataset next clones	*/
1791	dump_zap,		/* DSL scrub queue		*/
1792	dump_zap,		/* ZFS user/group used		*/
1793	dump_zap,		/* ZFS user/group quota		*/
1794	dump_zap,		/* snapshot refcount tags	*/
1795	dump_ddt_zap,		/* DDT ZAP object		*/
1796	dump_zap,		/* DDT statistics		*/
1797	dump_znode,		/* SA object			*/
1798	dump_zap,		/* SA Master Node		*/
1799	dump_sa_attrs,		/* SA attribute registration	*/
1800	dump_sa_layouts,	/* SA attribute layouts		*/
1801	dump_zap,		/* DSL scrub translations	*/
1802	dump_none,		/* fake dedup BP		*/
1803	dump_zap,		/* deadlist			*/
1804	dump_none,		/* deadlist hdr			*/
1805	dump_zap,		/* dsl clones			*/
1806	dump_bpobj_subobjs,	/* bpobj subobjs		*/
1807	dump_unknown,		/* Unknown type, must be last	*/
1808};
1809
1810static void
1811dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
1812{
1813	dmu_buf_t *db = NULL;
1814	dmu_object_info_t doi;
1815	dnode_t *dn;
1816	void *bonus = NULL;
1817	size_t bsize = 0;
1818	char iblk[32], dblk[32], lsize[32], asize[32], fill[32];
1819	char bonus_size[32];
1820	char aux[50];
1821	int error;
1822
1823	if (*print_header) {
1824		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
1825		    "Object", "lvl", "iblk", "dblk", "dsize", "lsize",
1826		    "%full", "type");
1827		*print_header = 0;
1828	}
1829
1830	if (object == 0) {
1831		dn = DMU_META_DNODE(os);
1832	} else {
1833		error = dmu_bonus_hold(os, object, FTAG, &db);
1834		if (error)
1835			fatal("dmu_bonus_hold(%llu) failed, errno %u",
1836			    object, error);
1837		bonus = db->db_data;
1838		bsize = db->db_size;
1839		dn = DB_DNODE((dmu_buf_impl_t *)db);
1840	}
1841	dmu_object_info_from_dnode(dn, &doi);
1842
1843	zdb_nicenum(doi.doi_metadata_block_size, iblk);
1844	zdb_nicenum(doi.doi_data_block_size, dblk);
1845	zdb_nicenum(doi.doi_max_offset, lsize);
1846	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize);
1847	zdb_nicenum(doi.doi_bonus_size, bonus_size);
1848	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
1849	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
1850	    doi.doi_max_offset);
1851
1852	aux[0] = '\0';
1853
1854	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
1855		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
1856		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
1857	}
1858
1859	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
1860		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
1861		    ZDB_COMPRESS_NAME(doi.doi_compress));
1862	}
1863
1864	(void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %6s  %s%s\n",
1865	    (u_longlong_t)object, doi.doi_indirection, iblk, dblk,
1866	    asize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
1867
1868	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
1869		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
1870		    "", "", "", "", "", bonus_size, "bonus",
1871		    ZDB_OT_NAME(doi.doi_bonus_type));
1872	}
1873
1874	if (verbosity >= 4) {
1875		(void) printf("\tdnode flags: %s%s%s\n",
1876		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
1877		    "USED_BYTES " : "",
1878		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
1879		    "USERUSED_ACCOUNTED " : "",
1880		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
1881		    "SPILL_BLKPTR" : "");
1882		(void) printf("\tdnode maxblkid: %llu\n",
1883		    (longlong_t)dn->dn_phys->dn_maxblkid);
1884
1885		object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
1886		    bonus, bsize);
1887		object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
1888		*print_header = 1;
1889	}
1890
1891	if (verbosity >= 5)
1892		dump_indirect(dn);
1893
1894	if (verbosity >= 5) {
1895		/*
1896		 * Report the list of segments that comprise the object.
1897		 */
1898		uint64_t start = 0;
1899		uint64_t end;
1900		uint64_t blkfill = 1;
1901		int minlvl = 1;
1902
1903		if (dn->dn_type == DMU_OT_DNODE) {
1904			minlvl = 0;
1905			blkfill = DNODES_PER_BLOCK;
1906		}
1907
1908		for (;;) {
1909			char segsize[32];
1910			error = dnode_next_offset(dn,
1911			    0, &start, minlvl, blkfill, 0);
1912			if (error)
1913				break;
1914			end = start;
1915			error = dnode_next_offset(dn,
1916			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
1917			zdb_nicenum(end - start, segsize);
1918			(void) printf("\t\tsegment [%016llx, %016llx)"
1919			    " size %5s\n", (u_longlong_t)start,
1920			    (u_longlong_t)end, segsize);
1921			if (error)
1922				break;
1923			start = end;
1924		}
1925	}
1926
1927	if (db != NULL)
1928		dmu_buf_rele(db, FTAG);
1929}
1930
1931static char *objset_types[DMU_OST_NUMTYPES] = {
1932	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1933
1934static void
1935dump_dir(objset_t *os)
1936{
1937	dmu_objset_stats_t dds;
1938	uint64_t object, object_count;
1939	uint64_t refdbytes, usedobjs, scratch;
1940	char numbuf[32];
1941	char blkbuf[BP_SPRINTF_LEN + 20];
1942	char osname[ZFS_MAX_DATASET_NAME_LEN];
1943	char *type = "UNKNOWN";
1944	int verbosity = dump_opt['d'];
1945	int print_header = 1;
1946	int i, error;
1947
1948	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
1949	dmu_objset_fast_stat(os, &dds);
1950	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
1951
1952	if (dds.dds_type < DMU_OST_NUMTYPES)
1953		type = objset_types[dds.dds_type];
1954
1955	if (dds.dds_type == DMU_OST_META) {
1956		dds.dds_creation_txg = TXG_INITIAL;
1957		usedobjs = BP_GET_FILL(os->os_rootbp);
1958		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
1959		    dd_used_bytes;
1960	} else {
1961		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
1962	}
1963
1964	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
1965
1966	zdb_nicenum(refdbytes, numbuf);
1967
1968	if (verbosity >= 4) {
1969		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
1970		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
1971		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
1972	} else {
1973		blkbuf[0] = '\0';
1974	}
1975
1976	dmu_objset_name(os, osname);
1977
1978	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
1979	    "%s, %llu objects%s\n",
1980	    osname, type, (u_longlong_t)dmu_objset_id(os),
1981	    (u_longlong_t)dds.dds_creation_txg,
1982	    numbuf, (u_longlong_t)usedobjs, blkbuf);
1983
1984	if (zopt_objects != 0) {
1985		for (i = 0; i < zopt_objects; i++)
1986			dump_object(os, zopt_object[i], verbosity,
1987			    &print_header);
1988		(void) printf("\n");
1989		return;
1990	}
1991
1992	if (dump_opt['i'] != 0 || verbosity >= 2)
1993		dump_intent_log(dmu_objset_zil(os));
1994
1995	if (dmu_objset_ds(os) != NULL)
1996		dump_deadlist(&dmu_objset_ds(os)->ds_deadlist);
1997
1998	if (verbosity < 2)
1999		return;
2000
2001	if (BP_IS_HOLE(os->os_rootbp))
2002		return;
2003
2004	dump_object(os, 0, verbosity, &print_header);
2005	object_count = 0;
2006	if (DMU_USERUSED_DNODE(os) != NULL &&
2007	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
2008		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header);
2009		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header);
2010	}
2011
2012	object = 0;
2013	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2014		dump_object(os, object, verbosity, &print_header);
2015		object_count++;
2016	}
2017
2018	ASSERT3U(object_count, ==, usedobjs);
2019
2020	(void) printf("\n");
2021
2022	if (error != ESRCH) {
2023		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2024		abort();
2025	}
2026}
2027
2028static void
2029dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2030{
2031	time_t timestamp = ub->ub_timestamp;
2032
2033	(void) printf(header ? header : "");
2034	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2035	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2036	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2037	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2038	(void) printf("\ttimestamp = %llu UTC = %s",
2039	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2040	if (dump_opt['u'] >= 3) {
2041		char blkbuf[BP_SPRINTF_LEN];
2042		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2043		(void) printf("\trootbp = %s\n", blkbuf);
2044	}
2045	(void) printf(footer ? footer : "");
2046}
2047
2048static void
2049dump_config(spa_t *spa)
2050{
2051	dmu_buf_t *db;
2052	size_t nvsize = 0;
2053	int error = 0;
2054
2055
2056	error = dmu_bonus_hold(spa->spa_meta_objset,
2057	    spa->spa_config_object, FTAG, &db);
2058
2059	if (error == 0) {
2060		nvsize = *(uint64_t *)db->db_data;
2061		dmu_buf_rele(db, FTAG);
2062
2063		(void) printf("\nMOS Configuration:\n");
2064		dump_packed_nvlist(spa->spa_meta_objset,
2065		    spa->spa_config_object, (void *)&nvsize, 1);
2066	} else {
2067		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2068		    (u_longlong_t)spa->spa_config_object, error);
2069	}
2070}
2071
2072static void
2073dump_cachefile(const char *cachefile)
2074{
2075	int fd;
2076	struct stat64 statbuf;
2077	char *buf;
2078	nvlist_t *config;
2079
2080	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2081		(void) printf("cannot open '%s': %s\n", cachefile,
2082		    strerror(errno));
2083		exit(1);
2084	}
2085
2086	if (fstat64(fd, &statbuf) != 0) {
2087		(void) printf("failed to stat '%s': %s\n", cachefile,
2088		    strerror(errno));
2089		exit(1);
2090	}
2091
2092	if ((buf = malloc(statbuf.st_size)) == NULL) {
2093		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
2094		    (u_longlong_t)statbuf.st_size);
2095		exit(1);
2096	}
2097
2098	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2099		(void) fprintf(stderr, "failed to read %llu bytes\n",
2100		    (u_longlong_t)statbuf.st_size);
2101		exit(1);
2102	}
2103
2104	(void) close(fd);
2105
2106	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2107		(void) fprintf(stderr, "failed to unpack nvlist\n");
2108		exit(1);
2109	}
2110
2111	free(buf);
2112
2113	dump_nvlist(config, 0);
2114
2115	nvlist_free(config);
2116}
2117
2118#define	ZDB_MAX_UB_HEADER_SIZE 32
2119
2120static void
2121dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2122{
2123	vdev_t vd;
2124	vdev_t *vdp = &vd;
2125	char header[ZDB_MAX_UB_HEADER_SIZE];
2126
2127	vd.vdev_ashift = ashift;
2128	vdp->vdev_top = vdp;
2129
2130	for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2131		uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2132		uberblock_t *ub = (void *)((char *)lbl + uoff);
2133
2134		if (uberblock_verify(ub))
2135			continue;
2136		(void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2137		    "Uberblock[%d]\n", i);
2138		dump_uberblock(ub, header, "");
2139	}
2140}
2141
2142static void
2143dump_label(const char *dev)
2144{
2145	int fd;
2146	vdev_label_t label;
2147	char *path, *buf = label.vl_vdev_phys.vp_nvlist;
2148	size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2149	struct stat64 statbuf;
2150	uint64_t psize, ashift;
2151	int len = strlen(dev) + 1;
2152
2153	if (strncmp(dev, ZFS_DISK_ROOTD, strlen(ZFS_DISK_ROOTD)) == 0) {
2154		len++;
2155		path = malloc(len);
2156		(void) snprintf(path, len, "%s%s", ZFS_RDISK_ROOTD,
2157		    dev + strlen(ZFS_DISK_ROOTD));
2158	} else {
2159		path = strdup(dev);
2160	}
2161
2162	if ((fd = open64(path, O_RDONLY)) < 0) {
2163		(void) printf("cannot open '%s': %s\n", path, strerror(errno));
2164		free(path);
2165		exit(1);
2166	}
2167
2168	if (fstat64(fd, &statbuf) != 0) {
2169		(void) printf("failed to stat '%s': %s\n", path,
2170		    strerror(errno));
2171		free(path);
2172		(void) close(fd);
2173		exit(1);
2174	}
2175
2176	if (S_ISBLK(statbuf.st_mode)) {
2177		(void) printf("cannot use '%s': character device required\n",
2178		    path);
2179		free(path);
2180		(void) close(fd);
2181		exit(1);
2182	}
2183
2184	psize = statbuf.st_size;
2185	psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2186
2187	for (int l = 0; l < VDEV_LABELS; l++) {
2188		nvlist_t *config = NULL;
2189
2190		(void) printf("--------------------------------------------\n");
2191		(void) printf("LABEL %d\n", l);
2192		(void) printf("--------------------------------------------\n");
2193
2194		if (pread64(fd, &label, sizeof (label),
2195		    vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2196			(void) printf("failed to read label %d\n", l);
2197			continue;
2198		}
2199
2200		if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2201			(void) printf("failed to unpack label %d\n", l);
2202			ashift = SPA_MINBLOCKSHIFT;
2203		} else {
2204			nvlist_t *vdev_tree = NULL;
2205
2206			dump_nvlist(config, 4);
2207			if ((nvlist_lookup_nvlist(config,
2208			    ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2209			    (nvlist_lookup_uint64(vdev_tree,
2210			    ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2211				ashift = SPA_MINBLOCKSHIFT;
2212			nvlist_free(config);
2213		}
2214		if (dump_opt['u'])
2215			dump_label_uberblocks(&label, ashift);
2216	}
2217
2218	free(path);
2219	(void) close(fd);
2220}
2221
2222static uint64_t dataset_feature_count[SPA_FEATURES];
2223
2224/*ARGSUSED*/
2225static int
2226dump_one_dir(const char *dsname, void *arg)
2227{
2228	int error;
2229	objset_t *os;
2230
2231	error = dmu_objset_own(dsname, DMU_OST_ANY, B_TRUE, FTAG, &os);
2232	if (error) {
2233		(void) printf("Could not open %s, error %d\n", dsname, error);
2234		return (0);
2235	}
2236
2237	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
2238		if (!dmu_objset_ds(os)->ds_feature_inuse[f])
2239			continue;
2240		ASSERT(spa_feature_table[f].fi_flags &
2241		    ZFEATURE_FLAG_PER_DATASET);
2242		dataset_feature_count[f]++;
2243	}
2244
2245	dump_dir(os);
2246	dmu_objset_disown(os, FTAG);
2247	fuid_table_destroy();
2248	sa_loaded = B_FALSE;
2249	return (0);
2250}
2251
2252/*
2253 * Block statistics.
2254 */
2255#define	PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2256typedef struct zdb_blkstats {
2257	uint64_t zb_asize;
2258	uint64_t zb_lsize;
2259	uint64_t zb_psize;
2260	uint64_t zb_count;
2261	uint64_t zb_gangs;
2262	uint64_t zb_ditto_samevdev;
2263	uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2264} zdb_blkstats_t;
2265
2266/*
2267 * Extended object types to report deferred frees and dedup auto-ditto blocks.
2268 */
2269#define	ZDB_OT_DEFERRED	(DMU_OT_NUMTYPES + 0)
2270#define	ZDB_OT_DITTO	(DMU_OT_NUMTYPES + 1)
2271#define	ZDB_OT_OTHER	(DMU_OT_NUMTYPES + 2)
2272#define	ZDB_OT_TOTAL	(DMU_OT_NUMTYPES + 3)
2273
2274static char *zdb_ot_extname[] = {
2275	"deferred free",
2276	"dedup ditto",
2277	"other",
2278	"Total",
2279};
2280
2281#define	ZB_TOTAL	DN_MAX_LEVELS
2282
2283typedef struct zdb_cb {
2284	zdb_blkstats_t	zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2285	uint64_t	zcb_dedup_asize;
2286	uint64_t	zcb_dedup_blocks;
2287	uint64_t	zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2288	uint64_t	zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2289	    [BPE_PAYLOAD_SIZE];
2290	uint64_t	zcb_start;
2291	uint64_t	zcb_lastprint;
2292	uint64_t	zcb_totalasize;
2293	uint64_t	zcb_errors[256];
2294	int		zcb_readfails;
2295	int		zcb_haderrors;
2296	spa_t		*zcb_spa;
2297} zdb_cb_t;
2298
2299static void
2300zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2301    dmu_object_type_t type)
2302{
2303	uint64_t refcnt = 0;
2304
2305	ASSERT(type < ZDB_OT_TOTAL);
2306
2307	if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2308		return;
2309
2310	for (int i = 0; i < 4; i++) {
2311		int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2312		int t = (i & 1) ? type : ZDB_OT_TOTAL;
2313		int equal;
2314		zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2315
2316		zb->zb_asize += BP_GET_ASIZE(bp);
2317		zb->zb_lsize += BP_GET_LSIZE(bp);
2318		zb->zb_psize += BP_GET_PSIZE(bp);
2319		zb->zb_count++;
2320
2321		/*
2322		 * The histogram is only big enough to record blocks up to
2323		 * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2324		 * "other", bucket.
2325		 */
2326		int idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2327		idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2328		zb->zb_psize_histogram[idx]++;
2329
2330		zb->zb_gangs += BP_COUNT_GANG(bp);
2331
2332		switch (BP_GET_NDVAS(bp)) {
2333		case 2:
2334			if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2335			    DVA_GET_VDEV(&bp->blk_dva[1]))
2336				zb->zb_ditto_samevdev++;
2337			break;
2338		case 3:
2339			equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2340			    DVA_GET_VDEV(&bp->blk_dva[1])) +
2341			    (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2342			    DVA_GET_VDEV(&bp->blk_dva[2])) +
2343			    (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2344			    DVA_GET_VDEV(&bp->blk_dva[2]));
2345			if (equal != 0)
2346				zb->zb_ditto_samevdev++;
2347			break;
2348		}
2349
2350	}
2351
2352	if (BP_IS_EMBEDDED(bp)) {
2353		zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2354		zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2355		    [BPE_GET_PSIZE(bp)]++;
2356		return;
2357	}
2358
2359	if (dump_opt['L'])
2360		return;
2361
2362	if (BP_GET_DEDUP(bp)) {
2363		ddt_t *ddt;
2364		ddt_entry_t *dde;
2365
2366		ddt = ddt_select(zcb->zcb_spa, bp);
2367		ddt_enter(ddt);
2368		dde = ddt_lookup(ddt, bp, B_FALSE);
2369
2370		if (dde == NULL) {
2371			refcnt = 0;
2372		} else {
2373			ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2374			ddt_phys_decref(ddp);
2375			refcnt = ddp->ddp_refcnt;
2376			if (ddt_phys_total_refcnt(dde) == 0)
2377				ddt_remove(ddt, dde);
2378		}
2379		ddt_exit(ddt);
2380	}
2381
2382	VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2383	    refcnt ? 0 : spa_first_txg(zcb->zcb_spa),
2384	    bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2385}
2386
2387static void
2388zdb_blkptr_done(zio_t *zio)
2389{
2390	spa_t *spa = zio->io_spa;
2391	blkptr_t *bp = zio->io_bp;
2392	int ioerr = zio->io_error;
2393	zdb_cb_t *zcb = zio->io_private;
2394	zbookmark_phys_t *zb = &zio->io_bookmark;
2395
2396	zio_data_buf_free(zio->io_data, zio->io_size);
2397
2398	mutex_enter(&spa->spa_scrub_lock);
2399	spa->spa_scrub_inflight--;
2400	cv_broadcast(&spa->spa_scrub_io_cv);
2401
2402	if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
2403		char blkbuf[BP_SPRINTF_LEN];
2404
2405		zcb->zcb_haderrors = 1;
2406		zcb->zcb_errors[ioerr]++;
2407
2408		if (dump_opt['b'] >= 2)
2409			snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2410		else
2411			blkbuf[0] = '\0';
2412
2413		(void) printf("zdb_blkptr_cb: "
2414		    "Got error %d reading "
2415		    "<%llu, %llu, %lld, %llx> %s -- skipping\n",
2416		    ioerr,
2417		    (u_longlong_t)zb->zb_objset,
2418		    (u_longlong_t)zb->zb_object,
2419		    (u_longlong_t)zb->zb_level,
2420		    (u_longlong_t)zb->zb_blkid,
2421		    blkbuf);
2422	}
2423	mutex_exit(&spa->spa_scrub_lock);
2424}
2425
2426static int
2427zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2428    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2429{
2430	zdb_cb_t *zcb = arg;
2431	dmu_object_type_t type;
2432	boolean_t is_metadata;
2433
2434	if (bp == NULL)
2435		return (0);
2436
2437	if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
2438		char blkbuf[BP_SPRINTF_LEN];
2439		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2440		(void) printf("objset %llu object %llu "
2441		    "level %lld offset 0x%llx %s\n",
2442		    (u_longlong_t)zb->zb_objset,
2443		    (u_longlong_t)zb->zb_object,
2444		    (longlong_t)zb->zb_level,
2445		    (u_longlong_t)blkid2offset(dnp, bp, zb),
2446		    blkbuf);
2447	}
2448
2449	if (BP_IS_HOLE(bp))
2450		return (0);
2451
2452	type = BP_GET_TYPE(bp);
2453
2454	zdb_count_block(zcb, zilog, bp,
2455	    (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
2456
2457	is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
2458
2459	if (!BP_IS_EMBEDDED(bp) &&
2460	    (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
2461		size_t size = BP_GET_PSIZE(bp);
2462		void *data = zio_data_buf_alloc(size);
2463		int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
2464
2465		/* If it's an intent log block, failure is expected. */
2466		if (zb->zb_level == ZB_ZIL_LEVEL)
2467			flags |= ZIO_FLAG_SPECULATIVE;
2468
2469		mutex_enter(&spa->spa_scrub_lock);
2470		while (spa->spa_scrub_inflight > max_inflight)
2471			cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
2472		spa->spa_scrub_inflight++;
2473		mutex_exit(&spa->spa_scrub_lock);
2474
2475		zio_nowait(zio_read(NULL, spa, bp, data, size,
2476		    zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
2477	}
2478
2479	zcb->zcb_readfails = 0;
2480
2481	/* only call gethrtime() every 100 blocks */
2482	static int iters;
2483	if (++iters > 100)
2484		iters = 0;
2485	else
2486		return (0);
2487
2488	if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
2489		uint64_t now = gethrtime();
2490		char buf[10];
2491		uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
2492		int kb_per_sec =
2493		    1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
2494		int sec_remaining =
2495		    (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
2496
2497		zfs_nicenum(bytes, buf, sizeof (buf));
2498		(void) fprintf(stderr,
2499		    "\r%5s completed (%4dMB/s) "
2500		    "estimated time remaining: %uhr %02umin %02usec        ",
2501		    buf, kb_per_sec / 1024,
2502		    sec_remaining / 60 / 60,
2503		    sec_remaining / 60 % 60,
2504		    sec_remaining % 60);
2505
2506		zcb->zcb_lastprint = now;
2507	}
2508
2509	return (0);
2510}
2511
2512static void
2513zdb_leak(void *arg, uint64_t start, uint64_t size)
2514{
2515	vdev_t *vd = arg;
2516
2517	(void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
2518	    (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
2519}
2520
2521static metaslab_ops_t zdb_metaslab_ops = {
2522	NULL	/* alloc */
2523};
2524
2525static void
2526zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
2527{
2528	ddt_bookmark_t ddb = { 0 };
2529	ddt_entry_t dde;
2530	int error;
2531
2532	while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
2533		blkptr_t blk;
2534		ddt_phys_t *ddp = dde.dde_phys;
2535
2536		if (ddb.ddb_class == DDT_CLASS_UNIQUE)
2537			return;
2538
2539		ASSERT(ddt_phys_total_refcnt(&dde) > 1);
2540
2541		for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
2542			if (ddp->ddp_phys_birth == 0)
2543				continue;
2544			ddt_bp_create(ddb.ddb_checksum,
2545			    &dde.dde_key, ddp, &blk);
2546			if (p == DDT_PHYS_DITTO) {
2547				zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
2548			} else {
2549				zcb->zcb_dedup_asize +=
2550				    BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
2551				zcb->zcb_dedup_blocks++;
2552			}
2553		}
2554		if (!dump_opt['L']) {
2555			ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
2556			ddt_enter(ddt);
2557			VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
2558			ddt_exit(ddt);
2559		}
2560	}
2561
2562	ASSERT(error == ENOENT);
2563}
2564
2565static void
2566zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
2567{
2568	zcb->zcb_spa = spa;
2569
2570	if (!dump_opt['L']) {
2571		vdev_t *rvd = spa->spa_root_vdev;
2572
2573		/*
2574		 * We are going to be changing the meaning of the metaslab's
2575		 * ms_tree.  Ensure that the allocator doesn't try to
2576		 * use the tree.
2577		 */
2578		spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
2579		spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
2580
2581		for (uint64_t c = 0; c < rvd->vdev_children; c++) {
2582			vdev_t *vd = rvd->vdev_child[c];
2583			metaslab_group_t *mg = vd->vdev_mg;
2584			for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
2585				metaslab_t *msp = vd->vdev_ms[m];
2586				ASSERT3P(msp->ms_group, ==, mg);
2587				mutex_enter(&msp->ms_lock);
2588				metaslab_unload(msp);
2589
2590				/*
2591				 * For leak detection, we overload the metaslab
2592				 * ms_tree to contain allocated segments
2593				 * instead of free segments. As a result,
2594				 * we can't use the normal metaslab_load/unload
2595				 * interfaces.
2596				 */
2597				if (msp->ms_sm != NULL) {
2598					(void) fprintf(stderr,
2599					    "\rloading space map for "
2600					    "vdev %llu of %llu, "
2601					    "metaslab %llu of %llu ...",
2602					    (longlong_t)c,
2603					    (longlong_t)rvd->vdev_children,
2604					    (longlong_t)m,
2605					    (longlong_t)vd->vdev_ms_count);
2606
2607					/*
2608					 * We don't want to spend the CPU
2609					 * manipulating the size-ordered
2610					 * tree, so clear the range_tree
2611					 * ops.
2612					 */
2613					msp->ms_tree->rt_ops = NULL;
2614					VERIFY0(space_map_load(msp->ms_sm,
2615					    msp->ms_tree, SM_ALLOC));
2616
2617					if (!msp->ms_loaded) {
2618						msp->ms_loaded = B_TRUE;
2619					}
2620				}
2621				mutex_exit(&msp->ms_lock);
2622			}
2623		}
2624		(void) fprintf(stderr, "\n");
2625	}
2626
2627	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2628
2629	zdb_ddt_leak_init(spa, zcb);
2630
2631	spa_config_exit(spa, SCL_CONFIG, FTAG);
2632}
2633
2634static void
2635zdb_leak_fini(spa_t *spa)
2636{
2637	if (!dump_opt['L']) {
2638		vdev_t *rvd = spa->spa_root_vdev;
2639		for (int c = 0; c < rvd->vdev_children; c++) {
2640			vdev_t *vd = rvd->vdev_child[c];
2641			metaslab_group_t *mg = vd->vdev_mg;
2642			for (int m = 0; m < vd->vdev_ms_count; m++) {
2643				metaslab_t *msp = vd->vdev_ms[m];
2644				ASSERT3P(mg, ==, msp->ms_group);
2645				mutex_enter(&msp->ms_lock);
2646
2647				/*
2648				 * The ms_tree has been overloaded to
2649				 * contain allocated segments. Now that we
2650				 * finished traversing all blocks, any
2651				 * block that remains in the ms_tree
2652				 * represents an allocated block that we
2653				 * did not claim during the traversal.
2654				 * Claimed blocks would have been removed
2655				 * from the ms_tree.
2656				 */
2657				range_tree_vacate(msp->ms_tree, zdb_leak, vd);
2658
2659				if (msp->ms_loaded) {
2660					msp->ms_loaded = B_FALSE;
2661				}
2662
2663				mutex_exit(&msp->ms_lock);
2664			}
2665		}
2666	}
2667}
2668
2669/* ARGSUSED */
2670static int
2671count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
2672{
2673	zdb_cb_t *zcb = arg;
2674
2675	if (dump_opt['b'] >= 5) {
2676		char blkbuf[BP_SPRINTF_LEN];
2677		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2678		(void) printf("[%s] %s\n",
2679		    "deferred free", blkbuf);
2680	}
2681	zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
2682	return (0);
2683}
2684
2685static int
2686dump_block_stats(spa_t *spa)
2687{
2688	zdb_cb_t zcb = { 0 };
2689	zdb_blkstats_t *zb, *tzb;
2690	uint64_t norm_alloc, norm_space, total_alloc, total_found;
2691	int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
2692	boolean_t leaks = B_FALSE;
2693
2694	(void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
2695	    (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
2696	    (dump_opt['c'] == 1) ? "metadata " : "",
2697	    dump_opt['c'] ? "checksums " : "",
2698	    (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
2699	    !dump_opt['L'] ? "nothing leaked " : "");
2700
2701	/*
2702	 * Load all space maps as SM_ALLOC maps, then traverse the pool
2703	 * claiming each block we discover.  If the pool is perfectly
2704	 * consistent, the space maps will be empty when we're done.
2705	 * Anything left over is a leak; any block we can't claim (because
2706	 * it's not part of any space map) is a double allocation,
2707	 * reference to a freed block, or an unclaimed log block.
2708	 */
2709	zdb_leak_init(spa, &zcb);
2710
2711	/*
2712	 * If there's a deferred-free bplist, process that first.
2713	 */
2714	(void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
2715	    count_block_cb, &zcb, NULL);
2716	if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
2717		(void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
2718		    count_block_cb, &zcb, NULL);
2719	}
2720	if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
2721		VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
2722		    spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
2723		    &zcb, NULL));
2724	}
2725
2726	if (dump_opt['c'] > 1)
2727		flags |= TRAVERSE_PREFETCH_DATA;
2728
2729	zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
2730	zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
2731	zcb.zcb_haderrors |= traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
2732
2733	/*
2734	 * If we've traversed the data blocks then we need to wait for those
2735	 * I/Os to complete. We leverage "The Godfather" zio to wait on
2736	 * all async I/Os to complete.
2737	 */
2738	if (dump_opt['c']) {
2739		for (int i = 0; i < max_ncpus; i++) {
2740			(void) zio_wait(spa->spa_async_zio_root[i]);
2741			spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
2742			    ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
2743			    ZIO_FLAG_GODFATHER);
2744		}
2745	}
2746
2747	if (zcb.zcb_haderrors) {
2748		(void) printf("\nError counts:\n\n");
2749		(void) printf("\t%5s  %s\n", "errno", "count");
2750		for (int e = 0; e < 256; e++) {
2751			if (zcb.zcb_errors[e] != 0) {
2752				(void) printf("\t%5d  %llu\n",
2753				    e, (u_longlong_t)zcb.zcb_errors[e]);
2754			}
2755		}
2756	}
2757
2758	/*
2759	 * Report any leaked segments.
2760	 */
2761	zdb_leak_fini(spa);
2762
2763	tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
2764
2765	norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
2766	norm_space = metaslab_class_get_space(spa_normal_class(spa));
2767
2768	total_alloc = norm_alloc + metaslab_class_get_alloc(spa_log_class(spa));
2769	total_found = tzb->zb_asize - zcb.zcb_dedup_asize;
2770
2771	if (total_found == total_alloc) {
2772		if (!dump_opt['L'])
2773			(void) printf("\n\tNo leaks (block sum matches space"
2774			    " maps exactly)\n");
2775	} else {
2776		(void) printf("block traversal size %llu != alloc %llu "
2777		    "(%s %lld)\n",
2778		    (u_longlong_t)total_found,
2779		    (u_longlong_t)total_alloc,
2780		    (dump_opt['L']) ? "unreachable" : "leaked",
2781		    (longlong_t)(total_alloc - total_found));
2782		leaks = B_TRUE;
2783	}
2784
2785	if (tzb->zb_count == 0)
2786		return (2);
2787
2788	(void) printf("\n");
2789	(void) printf("\tbp count:      %10llu\n",
2790	    (u_longlong_t)tzb->zb_count);
2791	(void) printf("\tganged count:  %10llu\n",
2792	    (longlong_t)tzb->zb_gangs);
2793	(void) printf("\tbp logical:    %10llu      avg: %6llu\n",
2794	    (u_longlong_t)tzb->zb_lsize,
2795	    (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
2796	(void) printf("\tbp physical:   %10llu      avg:"
2797	    " %6llu     compression: %6.2f\n",
2798	    (u_longlong_t)tzb->zb_psize,
2799	    (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
2800	    (double)tzb->zb_lsize / tzb->zb_psize);
2801	(void) printf("\tbp allocated:  %10llu      avg:"
2802	    " %6llu     compression: %6.2f\n",
2803	    (u_longlong_t)tzb->zb_asize,
2804	    (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
2805	    (double)tzb->zb_lsize / tzb->zb_asize);
2806	(void) printf("\tbp deduped:    %10llu    ref>1:"
2807	    " %6llu   deduplication: %6.2f\n",
2808	    (u_longlong_t)zcb.zcb_dedup_asize,
2809	    (u_longlong_t)zcb.zcb_dedup_blocks,
2810	    (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
2811	(void) printf("\tSPA allocated: %10llu     used: %5.2f%%\n",
2812	    (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
2813
2814	for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
2815		if (zcb.zcb_embedded_blocks[i] == 0)
2816			continue;
2817		(void) printf("\n");
2818		(void) printf("\tadditional, non-pointer bps of type %u: "
2819		    "%10llu\n",
2820		    i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
2821
2822		if (dump_opt['b'] >= 3) {
2823			(void) printf("\t number of (compressed) bytes:  "
2824			    "number of bps\n");
2825			dump_histogram(zcb.zcb_embedded_histogram[i],
2826			    sizeof (zcb.zcb_embedded_histogram[i]) /
2827			    sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
2828		}
2829	}
2830
2831	if (tzb->zb_ditto_samevdev != 0) {
2832		(void) printf("\tDittoed blocks on same vdev: %llu\n",
2833		    (longlong_t)tzb->zb_ditto_samevdev);
2834	}
2835
2836	if (dump_opt['b'] >= 2) {
2837		int l, t, level;
2838		(void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2839		    "\t  avg\t comp\t%%Total\tType\n");
2840
2841		for (t = 0; t <= ZDB_OT_TOTAL; t++) {
2842			char csize[32], lsize[32], psize[32], asize[32];
2843			char avg[32], gang[32];
2844			char *typename;
2845
2846			if (t < DMU_OT_NUMTYPES)
2847				typename = dmu_ot[t].ot_name;
2848			else
2849				typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
2850
2851			if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
2852				(void) printf("%6s\t%5s\t%5s\t%5s"
2853				    "\t%5s\t%5s\t%6s\t%s\n",
2854				    "-",
2855				    "-",
2856				    "-",
2857				    "-",
2858				    "-",
2859				    "-",
2860				    "-",
2861				    typename);
2862				continue;
2863			}
2864
2865			for (l = ZB_TOTAL - 1; l >= -1; l--) {
2866				level = (l == -1 ? ZB_TOTAL : l);
2867				zb = &zcb.zcb_type[level][t];
2868
2869				if (zb->zb_asize == 0)
2870					continue;
2871
2872				if (dump_opt['b'] < 3 && level != ZB_TOTAL)
2873					continue;
2874
2875				if (level == 0 && zb->zb_asize ==
2876				    zcb.zcb_type[ZB_TOTAL][t].zb_asize)
2877					continue;
2878
2879				zdb_nicenum(zb->zb_count, csize);
2880				zdb_nicenum(zb->zb_lsize, lsize);
2881				zdb_nicenum(zb->zb_psize, psize);
2882				zdb_nicenum(zb->zb_asize, asize);
2883				zdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2884				zdb_nicenum(zb->zb_gangs, gang);
2885
2886				(void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
2887				    "\t%5.2f\t%6.2f\t",
2888				    csize, lsize, psize, asize, avg,
2889				    (double)zb->zb_lsize / zb->zb_psize,
2890				    100.0 * zb->zb_asize / tzb->zb_asize);
2891
2892				if (level == ZB_TOTAL)
2893					(void) printf("%s\n", typename);
2894				else
2895					(void) printf("    L%d %s\n",
2896					    level, typename);
2897
2898				if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
2899					(void) printf("\t number of ganged "
2900					    "blocks: %s\n", gang);
2901				}
2902
2903				if (dump_opt['b'] >= 4) {
2904					(void) printf("psize "
2905					    "(in 512-byte sectors): "
2906					    "number of blocks\n");
2907					dump_histogram(zb->zb_psize_histogram,
2908					    PSIZE_HISTO_SIZE, 0);
2909				}
2910			}
2911		}
2912	}
2913
2914	(void) printf("\n");
2915
2916	if (leaks)
2917		return (2);
2918
2919	if (zcb.zcb_haderrors)
2920		return (3);
2921
2922	return (0);
2923}
2924
2925typedef struct zdb_ddt_entry {
2926	ddt_key_t	zdde_key;
2927	uint64_t	zdde_ref_blocks;
2928	uint64_t	zdde_ref_lsize;
2929	uint64_t	zdde_ref_psize;
2930	uint64_t	zdde_ref_dsize;
2931	avl_node_t	zdde_node;
2932} zdb_ddt_entry_t;
2933
2934/* ARGSUSED */
2935static int
2936zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2937    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2938{
2939	avl_tree_t *t = arg;
2940	avl_index_t where;
2941	zdb_ddt_entry_t *zdde, zdde_search;
2942
2943	if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
2944		return (0);
2945
2946	if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
2947		(void) printf("traversing objset %llu, %llu objects, "
2948		    "%lu blocks so far\n",
2949		    (u_longlong_t)zb->zb_objset,
2950		    (u_longlong_t)BP_GET_FILL(bp),
2951		    avl_numnodes(t));
2952	}
2953
2954	if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
2955	    BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
2956		return (0);
2957
2958	ddt_key_fill(&zdde_search.zdde_key, bp);
2959
2960	zdde = avl_find(t, &zdde_search, &where);
2961
2962	if (zdde == NULL) {
2963		zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
2964		zdde->zdde_key = zdde_search.zdde_key;
2965		avl_insert(t, zdde, where);
2966	}
2967
2968	zdde->zdde_ref_blocks += 1;
2969	zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
2970	zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
2971	zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
2972
2973	return (0);
2974}
2975
2976static void
2977dump_simulated_ddt(spa_t *spa)
2978{
2979	avl_tree_t t;
2980	void *cookie = NULL;
2981	zdb_ddt_entry_t *zdde;
2982	ddt_histogram_t ddh_total = { 0 };
2983	ddt_stat_t dds_total = { 0 };
2984
2985	avl_create(&t, ddt_entry_compare,
2986	    sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
2987
2988	spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2989
2990	(void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
2991	    zdb_ddt_add_cb, &t);
2992
2993	spa_config_exit(spa, SCL_CONFIG, FTAG);
2994
2995	while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
2996		ddt_stat_t dds;
2997		uint64_t refcnt = zdde->zdde_ref_blocks;
2998		ASSERT(refcnt != 0);
2999
3000		dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
3001		dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
3002		dds.dds_psize = zdde->zdde_ref_psize / refcnt;
3003		dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
3004
3005		dds.dds_ref_blocks = zdde->zdde_ref_blocks;
3006		dds.dds_ref_lsize = zdde->zdde_ref_lsize;
3007		dds.dds_ref_psize = zdde->zdde_ref_psize;
3008		dds.dds_ref_dsize = zdde->zdde_ref_dsize;
3009
3010		ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
3011		    &dds, 0);
3012
3013		umem_free(zdde, sizeof (*zdde));
3014	}
3015
3016	avl_destroy(&t);
3017
3018	ddt_histogram_stat(&dds_total, &ddh_total);
3019
3020	(void) printf("Simulated DDT histogram:\n");
3021
3022	zpool_dump_ddt(&dds_total, &ddh_total);
3023
3024	dump_dedup_ratio(&dds_total);
3025}
3026
3027static void
3028dump_zpool(spa_t *spa)
3029{
3030	dsl_pool_t *dp = spa_get_dsl(spa);
3031	int rc = 0;
3032
3033	if (dump_opt['S']) {
3034		dump_simulated_ddt(spa);
3035		return;
3036	}
3037
3038	if (!dump_opt['e'] && dump_opt['C'] > 1) {
3039		(void) printf("\nCached configuration:\n");
3040		dump_nvlist(spa->spa_config, 8);
3041	}
3042
3043	if (dump_opt['C'])
3044		dump_config(spa);
3045
3046	if (dump_opt['u'])
3047		dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
3048
3049	if (dump_opt['D'])
3050		dump_all_ddts(spa);
3051
3052	if (dump_opt['d'] > 2 || dump_opt['m'])
3053		dump_metaslabs(spa);
3054	if (dump_opt['M'])
3055		dump_metaslab_groups(spa);
3056
3057	if (dump_opt['d'] || dump_opt['i']) {
3058		dump_dir(dp->dp_meta_objset);
3059		if (dump_opt['d'] >= 3) {
3060			dump_full_bpobj(&spa->spa_deferred_bpobj,
3061			    "Deferred frees", 0);
3062			if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
3063				dump_full_bpobj(
3064				    &spa->spa_dsl_pool->dp_free_bpobj,
3065				    "Pool snapshot frees", 0);
3066			}
3067
3068			if (spa_feature_is_active(spa,
3069			    SPA_FEATURE_ASYNC_DESTROY)) {
3070				dump_bptree(spa->spa_meta_objset,
3071				    spa->spa_dsl_pool->dp_bptree_obj,
3072				    "Pool dataset frees");
3073			}
3074			dump_dtl(spa->spa_root_vdev, 0);
3075		}
3076		(void) dmu_objset_find(spa_name(spa), dump_one_dir,
3077		    NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
3078
3079		for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
3080			uint64_t refcount;
3081
3082			if (!(spa_feature_table[f].fi_flags &
3083			    ZFEATURE_FLAG_PER_DATASET) ||
3084			    !spa_feature_is_enabled(spa, f)) {
3085				ASSERT0(dataset_feature_count[f]);
3086				continue;
3087			}
3088			(void) feature_get_refcount(spa,
3089			    &spa_feature_table[f], &refcount);
3090			if (dataset_feature_count[f] != refcount) {
3091				(void) printf("%s feature refcount mismatch: "
3092				    "%lld datasets != %lld refcount\n",
3093				    spa_feature_table[f].fi_uname,
3094				    (longlong_t)dataset_feature_count[f],
3095				    (longlong_t)refcount);
3096				rc = 2;
3097			} else {
3098				(void) printf("Verified %s feature refcount "
3099				    "of %llu is correct\n",
3100				    spa_feature_table[f].fi_uname,
3101				    (longlong_t)refcount);
3102			}
3103		}
3104	}
3105	if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
3106		rc = dump_block_stats(spa);
3107
3108	if (rc == 0)
3109		rc = verify_spacemap_refcounts(spa);
3110
3111	if (dump_opt['s'])
3112		show_pool_stats(spa);
3113
3114	if (dump_opt['h'])
3115		dump_history(spa);
3116
3117	if (rc != 0) {
3118		dump_debug_buffer();
3119		exit(rc);
3120	}
3121}
3122
3123#define	ZDB_FLAG_CHECKSUM	0x0001
3124#define	ZDB_FLAG_DECOMPRESS	0x0002
3125#define	ZDB_FLAG_BSWAP		0x0004
3126#define	ZDB_FLAG_GBH		0x0008
3127#define	ZDB_FLAG_INDIRECT	0x0010
3128#define	ZDB_FLAG_PHYS		0x0020
3129#define	ZDB_FLAG_RAW		0x0040
3130#define	ZDB_FLAG_PRINT_BLKPTR	0x0080
3131
3132int flagbits[256];
3133
3134static void
3135zdb_print_blkptr(blkptr_t *bp, int flags)
3136{
3137	char blkbuf[BP_SPRINTF_LEN];
3138
3139	if (flags & ZDB_FLAG_BSWAP)
3140		byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
3141
3142	snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3143	(void) printf("%s\n", blkbuf);
3144}
3145
3146static void
3147zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
3148{
3149	int i;
3150
3151	for (i = 0; i < nbps; i++)
3152		zdb_print_blkptr(&bp[i], flags);
3153}
3154
3155static void
3156zdb_dump_gbh(void *buf, int flags)
3157{
3158	zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
3159}
3160
3161static void
3162zdb_dump_block_raw(void *buf, uint64_t size, int flags)
3163{
3164	if (flags & ZDB_FLAG_BSWAP)
3165		byteswap_uint64_array(buf, size);
3166	(void) write(1, buf, size);
3167}
3168
3169static void
3170zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
3171{
3172	uint64_t *d = (uint64_t *)buf;
3173	int nwords = size / sizeof (uint64_t);
3174	int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
3175	int i, j;
3176	char *hdr, *c;
3177
3178
3179	if (do_bswap)
3180		hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
3181	else
3182		hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
3183
3184	(void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
3185
3186	for (i = 0; i < nwords; i += 2) {
3187		(void) printf("%06llx:  %016llx  %016llx  ",
3188		    (u_longlong_t)(i * sizeof (uint64_t)),
3189		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
3190		    (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
3191
3192		c = (char *)&d[i];
3193		for (j = 0; j < 2 * sizeof (uint64_t); j++)
3194			(void) printf("%c", isprint(c[j]) ? c[j] : '.');
3195		(void) printf("\n");
3196	}
3197}
3198
3199/*
3200 * There are two acceptable formats:
3201 *	leaf_name	  - For example: c1t0d0 or /tmp/ztest.0a
3202 *	child[.child]*    - For example: 0.1.1
3203 *
3204 * The second form can be used to specify arbitrary vdevs anywhere
3205 * in the heirarchy.  For example, in a pool with a mirror of
3206 * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
3207 */
3208static vdev_t *
3209zdb_vdev_lookup(vdev_t *vdev, char *path)
3210{
3211	char *s, *p, *q;
3212	int i;
3213
3214	if (vdev == NULL)
3215		return (NULL);
3216
3217	/* First, assume the x.x.x.x format */
3218	i = (int)strtoul(path, &s, 10);
3219	if (s == path || (s && *s != '.' && *s != '\0'))
3220		goto name;
3221	if (i < 0 || i >= vdev->vdev_children)
3222		return (NULL);
3223
3224	vdev = vdev->vdev_child[i];
3225	if (*s == '\0')
3226		return (vdev);
3227	return (zdb_vdev_lookup(vdev, s+1));
3228
3229name:
3230	for (i = 0; i < vdev->vdev_children; i++) {
3231		vdev_t *vc = vdev->vdev_child[i];
3232
3233		if (vc->vdev_path == NULL) {
3234			vc = zdb_vdev_lookup(vc, path);
3235			if (vc == NULL)
3236				continue;
3237			else
3238				return (vc);
3239		}
3240
3241		p = strrchr(vc->vdev_path, '/');
3242		p = p ? p + 1 : vc->vdev_path;
3243		q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
3244
3245		if (strcmp(vc->vdev_path, path) == 0)
3246			return (vc);
3247		if (strcmp(p, path) == 0)
3248			return (vc);
3249		if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
3250			return (vc);
3251	}
3252
3253	return (NULL);
3254}
3255
3256/*
3257 * Read a block from a pool and print it out.  The syntax of the
3258 * block descriptor is:
3259 *
3260 *	pool:vdev_specifier:offset:size[:flags]
3261 *
3262 *	pool           - The name of the pool you wish to read from
3263 *	vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
3264 *	offset         - offset, in hex, in bytes
3265 *	size           - Amount of data to read, in hex, in bytes
3266 *	flags          - A string of characters specifying options
3267 *		 b: Decode a blkptr at given offset within block
3268 *		*c: Calculate and display checksums
3269 *		 d: Decompress data before dumping
3270 *		 e: Byteswap data before dumping
3271 *		 g: Display data as a gang block header
3272 *		 i: Display as an indirect block
3273 *		 p: Do I/O to physical offset
3274 *		 r: Dump raw data to stdout
3275 *
3276 *              * = not yet implemented
3277 */
3278static void
3279zdb_read_block(char *thing, spa_t *spa)
3280{
3281	blkptr_t blk, *bp = &blk;
3282	dva_t *dva = bp->blk_dva;
3283	int flags = 0;
3284	uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
3285	zio_t *zio;
3286	vdev_t *vd;
3287	void *pbuf, *lbuf, *buf;
3288	char *s, *p, *dup, *vdev, *flagstr;
3289	int i, error;
3290
3291	dup = strdup(thing);
3292	s = strtok(dup, ":");
3293	vdev = s ? s : "";
3294	s = strtok(NULL, ":");
3295	offset = strtoull(s ? s : "", NULL, 16);
3296	s = strtok(NULL, ":");
3297	size = strtoull(s ? s : "", NULL, 16);
3298	s = strtok(NULL, ":");
3299	flagstr = s ? s : "";
3300
3301	s = NULL;
3302	if (size == 0)
3303		s = "size must not be zero";
3304	if (!IS_P2ALIGNED(size, DEV_BSIZE))
3305		s = "size must be a multiple of sector size";
3306	if (!IS_P2ALIGNED(offset, DEV_BSIZE))
3307		s = "offset must be a multiple of sector size";
3308	if (s) {
3309		(void) printf("Invalid block specifier: %s  - %s\n", thing, s);
3310		free(dup);
3311		return;
3312	}
3313
3314	for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
3315		for (i = 0; flagstr[i]; i++) {
3316			int bit = flagbits[(uchar_t)flagstr[i]];
3317
3318			if (bit == 0) {
3319				(void) printf("***Invalid flag: %c\n",
3320				    flagstr[i]);
3321				continue;
3322			}
3323			flags |= bit;
3324
3325			/* If it's not something with an argument, keep going */
3326			if ((bit & (ZDB_FLAG_CHECKSUM |
3327			    ZDB_FLAG_PRINT_BLKPTR)) == 0)
3328				continue;
3329
3330			p = &flagstr[i + 1];
3331			if (bit == ZDB_FLAG_PRINT_BLKPTR)
3332				blkptr_offset = strtoull(p, &p, 16);
3333			if (*p != ':' && *p != '\0') {
3334				(void) printf("***Invalid flag arg: '%s'\n", s);
3335				free(dup);
3336				return;
3337			}
3338		}
3339	}
3340
3341	vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
3342	if (vd == NULL) {
3343		(void) printf("***Invalid vdev: %s\n", vdev);
3344		free(dup);
3345		return;
3346	} else {
3347		if (vd->vdev_path)
3348			(void) fprintf(stderr, "Found vdev: %s\n",
3349			    vd->vdev_path);
3350		else
3351			(void) fprintf(stderr, "Found vdev type: %s\n",
3352			    vd->vdev_ops->vdev_op_type);
3353	}
3354
3355	psize = size;
3356	lsize = size;
3357
3358	pbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3359	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3360
3361	BP_ZERO(bp);
3362
3363	DVA_SET_VDEV(&dva[0], vd->vdev_id);
3364	DVA_SET_OFFSET(&dva[0], offset);
3365	DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
3366	DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
3367
3368	BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
3369
3370	BP_SET_LSIZE(bp, lsize);
3371	BP_SET_PSIZE(bp, psize);
3372	BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
3373	BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
3374	BP_SET_TYPE(bp, DMU_OT_NONE);
3375	BP_SET_LEVEL(bp, 0);
3376	BP_SET_DEDUP(bp, 0);
3377	BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
3378
3379	spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
3380	zio = zio_root(spa, NULL, NULL, 0);
3381
3382	if (vd == vd->vdev_top) {
3383		/*
3384		 * Treat this as a normal block read.
3385		 */
3386		zio_nowait(zio_read(zio, spa, bp, pbuf, psize, NULL, NULL,
3387		    ZIO_PRIORITY_SYNC_READ,
3388		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
3389	} else {
3390		/*
3391		 * Treat this as a vdev child I/O.
3392		 */
3393		zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pbuf, psize,
3394		    ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
3395		    ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
3396		    ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
3397		    ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL, NULL));
3398	}
3399
3400	error = zio_wait(zio);
3401	spa_config_exit(spa, SCL_STATE, FTAG);
3402
3403	if (error) {
3404		(void) printf("Read of %s failed, error: %d\n", thing, error);
3405		goto out;
3406	}
3407
3408	if (flags & ZDB_FLAG_DECOMPRESS) {
3409		/*
3410		 * We don't know how the data was compressed, so just try
3411		 * every decompress function at every inflated blocksize.
3412		 */
3413		enum zio_compress c;
3414		void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3415		void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3416
3417		bcopy(pbuf, pbuf2, psize);
3418
3419		VERIFY(random_get_pseudo_bytes((uint8_t *)pbuf + psize,
3420		    SPA_MAXBLOCKSIZE - psize) == 0);
3421
3422		VERIFY(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
3423		    SPA_MAXBLOCKSIZE - psize) == 0);
3424
3425		for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
3426		    lsize -= SPA_MINBLOCKSIZE) {
3427			for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
3428				if (zio_decompress_data(c, pbuf, lbuf,
3429				    psize, lsize) == 0 &&
3430				    zio_decompress_data(c, pbuf2, lbuf2,
3431				    psize, lsize) == 0 &&
3432				    bcmp(lbuf, lbuf2, lsize) == 0)
3433					break;
3434			}
3435			if (c != ZIO_COMPRESS_FUNCTIONS)
3436				break;
3437			lsize -= SPA_MINBLOCKSIZE;
3438		}
3439
3440		umem_free(pbuf2, SPA_MAXBLOCKSIZE);
3441		umem_free(lbuf2, SPA_MAXBLOCKSIZE);
3442
3443		if (lsize <= psize) {
3444			(void) printf("Decompress of %s failed\n", thing);
3445			goto out;
3446		}
3447		buf = lbuf;
3448		size = lsize;
3449	} else {
3450		buf = pbuf;
3451		size = psize;
3452	}
3453
3454	if (flags & ZDB_FLAG_PRINT_BLKPTR)
3455		zdb_print_blkptr((blkptr_t *)(void *)
3456		    ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
3457	else if (flags & ZDB_FLAG_RAW)
3458		zdb_dump_block_raw(buf, size, flags);
3459	else if (flags & ZDB_FLAG_INDIRECT)
3460		zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
3461		    flags);
3462	else if (flags & ZDB_FLAG_GBH)
3463		zdb_dump_gbh(buf, flags);
3464	else
3465		zdb_dump_block(thing, buf, size, flags);
3466
3467out:
3468	umem_free(pbuf, SPA_MAXBLOCKSIZE);
3469	umem_free(lbuf, SPA_MAXBLOCKSIZE);
3470	free(dup);
3471}
3472
3473static boolean_t
3474pool_match(nvlist_t *cfg, char *tgt)
3475{
3476	uint64_t v, guid = strtoull(tgt, NULL, 0);
3477	char *s;
3478
3479	if (guid != 0) {
3480		if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0)
3481			return (v == guid);
3482	} else {
3483		if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0)
3484			return (strcmp(s, tgt) == 0);
3485	}
3486	return (B_FALSE);
3487}
3488
3489static char *
3490find_zpool(char **target, nvlist_t **configp, int dirc, char **dirv)
3491{
3492	nvlist_t *pools;
3493	nvlist_t *match = NULL;
3494	char *name = NULL;
3495	char *sepp = NULL;
3496	char sep = '\0';
3497	int count = 0;
3498	importargs_t args = { 0 };
3499
3500	args.paths = dirc;
3501	args.path = dirv;
3502	args.can_be_active = B_TRUE;
3503
3504	if ((sepp = strpbrk(*target, "/@")) != NULL) {
3505		sep = *sepp;
3506		*sepp = '\0';
3507	}
3508
3509	pools = zpool_search_import(g_zfs, &args);
3510
3511	if (pools != NULL) {
3512		nvpair_t *elem = NULL;
3513		while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) {
3514			verify(nvpair_value_nvlist(elem, configp) == 0);
3515			if (pool_match(*configp, *target)) {
3516				count++;
3517				if (match != NULL) {
3518					/* print previously found config */
3519					if (name != NULL) {
3520						(void) printf("%s\n", name);
3521						dump_nvlist(match, 8);
3522						name = NULL;
3523					}
3524					(void) printf("%s\n",
3525					    nvpair_name(elem));
3526					dump_nvlist(*configp, 8);
3527				} else {
3528					match = *configp;
3529					name = nvpair_name(elem);
3530				}
3531			}
3532		}
3533	}
3534	if (count > 1)
3535		(void) fatal("\tMatched %d pools - use pool GUID "
3536		    "instead of pool name or \n"
3537		    "\tpool name part of a dataset name to select pool", count);
3538
3539	if (sepp)
3540		*sepp = sep;
3541	/*
3542	 * If pool GUID was specified for pool id, replace it with pool name
3543	 */
3544	if (name && (strstr(*target, name) != *target)) {
3545		int sz = 1 + strlen(name) + ((sepp) ? strlen(sepp) : 0);
3546
3547		*target = umem_alloc(sz, UMEM_NOFAIL);
3548		(void) snprintf(*target, sz, "%s%s", name, sepp ? sepp : "");
3549	}
3550
3551	*configp = name ? match : NULL;
3552
3553	return (name);
3554}
3555
3556int
3557main(int argc, char **argv)
3558{
3559	int i, c;
3560	struct rlimit rl = { 1024, 1024 };
3561	spa_t *spa = NULL;
3562	objset_t *os = NULL;
3563	int dump_all = 1;
3564	int verbose = 0;
3565	int error = 0;
3566	char **searchdirs = NULL;
3567	int nsearch = 0;
3568	char *target;
3569	nvlist_t *policy = NULL;
3570	uint64_t max_txg = UINT64_MAX;
3571	int rewind = ZPOOL_NEVER_REWIND;
3572	char *spa_config_path_env;
3573	boolean_t target_is_spa = B_TRUE;
3574
3575	(void) setrlimit(RLIMIT_NOFILE, &rl);
3576	(void) enable_extended_FILE_stdio(-1, -1);
3577
3578	dprintf_setup(&argc, argv);
3579
3580	/*
3581	 * If there is an environment variable SPA_CONFIG_PATH it overrides
3582	 * default spa_config_path setting. If -U flag is specified it will
3583	 * override this environment variable settings once again.
3584	 */
3585	spa_config_path_env = getenv("SPA_CONFIG_PATH");
3586	if (spa_config_path_env != NULL)
3587		spa_config_path = spa_config_path_env;
3588
3589	while ((c = getopt(argc, argv,
3590	    "bcdhilmMI:suCDRSAFLXx:evp:t:U:PGo:")) != -1) {
3591		switch (c) {
3592		case 'b':
3593		case 'c':
3594		case 'd':
3595		case 'h':
3596		case 'i':
3597		case 'l':
3598		case 'm':
3599		case 's':
3600		case 'u':
3601		case 'C':
3602		case 'D':
3603		case 'M':
3604		case 'R':
3605		case 'S':
3606		case 'G':
3607			dump_opt[c]++;
3608			dump_all = 0;
3609			break;
3610		case 'A':
3611		case 'F':
3612		case 'L':
3613		case 'X':
3614		case 'e':
3615		case 'P':
3616			dump_opt[c]++;
3617			break;
3618		case 'I':
3619			max_inflight = strtoull(optarg, NULL, 0);
3620			if (max_inflight == 0) {
3621				(void) fprintf(stderr, "maximum number "
3622				    "of inflight I/Os must be greater "
3623				    "than 0\n");
3624				usage();
3625			}
3626			break;
3627		case 'p':
3628			if (searchdirs == NULL) {
3629				searchdirs = umem_alloc(sizeof (char *),
3630				    UMEM_NOFAIL);
3631			} else {
3632				char **tmp = umem_alloc((nsearch + 1) *
3633				    sizeof (char *), UMEM_NOFAIL);
3634				bcopy(searchdirs, tmp, nsearch *
3635				    sizeof (char *));
3636				umem_free(searchdirs,
3637				    nsearch * sizeof (char *));
3638				searchdirs = tmp;
3639			}
3640			searchdirs[nsearch++] = optarg;
3641			break;
3642		case 't':
3643			max_txg = strtoull(optarg, NULL, 0);
3644			if (max_txg < TXG_INITIAL) {
3645				(void) fprintf(stderr, "incorrect txg "
3646				    "specified: %s\n", optarg);
3647				usage();
3648			}
3649			break;
3650		case 'U':
3651			spa_config_path = optarg;
3652			break;
3653		case 'v':
3654			verbose++;
3655			break;
3656		case 'x':
3657			vn_dumpdir = optarg;
3658			break;
3659		case 'o':
3660			error = set_global_var(optarg);
3661			if (error != 0)
3662				usage();
3663			break;
3664		default:
3665			usage();
3666			break;
3667		}
3668	}
3669
3670	if (!dump_opt['e'] && searchdirs != NULL) {
3671		(void) fprintf(stderr, "-p option requires use of -e\n");
3672		usage();
3673	}
3674
3675	/*
3676	 * ZDB does not typically re-read blocks; therefore limit the ARC
3677	 * to 256 MB, which can be used entirely for metadata.
3678	 */
3679	zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
3680
3681	/*
3682	 * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
3683	 * "zdb -b" uses traversal prefetch which uses async reads.
3684	 * For good performance, let several of them be active at once.
3685	 */
3686	zfs_vdev_async_read_max_active = 10;
3687
3688	/*
3689	 * Disable reference tracking for better performance.
3690	 */
3691	reference_tracking_enable = B_FALSE;
3692
3693	kernel_init(FREAD);
3694	g_zfs = libzfs_init();
3695	ASSERT(g_zfs != NULL);
3696
3697	if (dump_all)
3698		verbose = MAX(verbose, 1);
3699
3700	for (c = 0; c < 256; c++) {
3701		if (dump_all && !strchr("elAFLRSXP", c))
3702			dump_opt[c] = 1;
3703		if (dump_opt[c])
3704			dump_opt[c] += verbose;
3705	}
3706
3707	aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
3708	zfs_recover = (dump_opt['A'] > 1);
3709
3710	argc -= optind;
3711	argv += optind;
3712
3713	if (argc < 2 && dump_opt['R'])
3714		usage();
3715	if (argc < 1) {
3716		if (!dump_opt['e'] && dump_opt['C']) {
3717			dump_cachefile(spa_config_path);
3718			return (0);
3719		}
3720		usage();
3721	}
3722
3723	if (dump_opt['l']) {
3724		dump_label(argv[0]);
3725		return (0);
3726	}
3727
3728	if (dump_opt['X'] || dump_opt['F'])
3729		rewind = ZPOOL_DO_REWIND |
3730		    (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
3731
3732	if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
3733	    nvlist_add_uint64(policy, ZPOOL_REWIND_REQUEST_TXG, max_txg) != 0 ||
3734	    nvlist_add_uint32(policy, ZPOOL_REWIND_REQUEST, rewind) != 0)
3735		fatal("internal error: %s", strerror(ENOMEM));
3736
3737	error = 0;
3738	target = argv[0];
3739
3740	if (dump_opt['e']) {
3741		nvlist_t *cfg = NULL;
3742		char *name = find_zpool(&target, &cfg, nsearch, searchdirs);
3743
3744		error = ENOENT;
3745		if (name) {
3746			if (dump_opt['C'] > 1) {
3747				(void) printf("\nConfiguration for import:\n");
3748				dump_nvlist(cfg, 8);
3749			}
3750			if (nvlist_add_nvlist(cfg,
3751			    ZPOOL_REWIND_POLICY, policy) != 0) {
3752				fatal("can't open '%s': %s",
3753				    target, strerror(ENOMEM));
3754			}
3755			if ((error = spa_import(name, cfg, NULL,
3756			    ZFS_IMPORT_MISSING_LOG)) != 0) {
3757				error = spa_import(name, cfg, NULL,
3758				    ZFS_IMPORT_VERBATIM);
3759			}
3760		}
3761	}
3762
3763	if (strpbrk(target, "/@") != NULL) {
3764		size_t targetlen;
3765
3766		target_is_spa = B_FALSE;
3767		/*
3768		 * Remove any trailing slash.  Later code would get confused
3769		 * by it, but we want to allow it so that "pool/" can
3770		 * indicate that we want to dump the topmost filesystem,
3771		 * rather than the whole pool.
3772		 */
3773		targetlen = strlen(target);
3774		if (targetlen != 0 && target[targetlen - 1] == '/')
3775			target[targetlen - 1] = '\0';
3776	}
3777
3778	if (error == 0) {
3779		if (target_is_spa || dump_opt['R']) {
3780			error = spa_open_rewind(target, &spa, FTAG, policy,
3781			    NULL);
3782			if (error) {
3783				/*
3784				 * If we're missing the log device then
3785				 * try opening the pool after clearing the
3786				 * log state.
3787				 */
3788				mutex_enter(&spa_namespace_lock);
3789				if ((spa = spa_lookup(target)) != NULL &&
3790				    spa->spa_log_state == SPA_LOG_MISSING) {
3791					spa->spa_log_state = SPA_LOG_CLEAR;
3792					error = 0;
3793				}
3794				mutex_exit(&spa_namespace_lock);
3795
3796				if (!error) {
3797					error = spa_open_rewind(target, &spa,
3798					    FTAG, policy, NULL);
3799				}
3800			}
3801		} else {
3802			error = dmu_objset_own(target, DMU_OST_ANY,
3803			    B_TRUE, FTAG, &os);
3804		}
3805	}
3806	nvlist_free(policy);
3807
3808	if (error)
3809		fatal("can't open '%s': %s", target, strerror(error));
3810
3811	argv++;
3812	argc--;
3813	if (!dump_opt['R']) {
3814		if (argc > 0) {
3815			zopt_objects = argc;
3816			zopt_object = calloc(zopt_objects, sizeof (uint64_t));
3817			for (i = 0; i < zopt_objects; i++) {
3818				errno = 0;
3819				zopt_object[i] = strtoull(argv[i], NULL, 0);
3820				if (zopt_object[i] == 0 && errno != 0)
3821					fatal("bad number %s: %s",
3822					    argv[i], strerror(errno));
3823			}
3824		}
3825		if (os != NULL) {
3826			dump_dir(os);
3827		} else if (zopt_objects > 0 && !dump_opt['m']) {
3828			dump_dir(spa->spa_meta_objset);
3829		} else {
3830			dump_zpool(spa);
3831		}
3832	} else {
3833		flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
3834		flagbits['c'] = ZDB_FLAG_CHECKSUM;
3835		flagbits['d'] = ZDB_FLAG_DECOMPRESS;
3836		flagbits['e'] = ZDB_FLAG_BSWAP;
3837		flagbits['g'] = ZDB_FLAG_GBH;
3838		flagbits['i'] = ZDB_FLAG_INDIRECT;
3839		flagbits['p'] = ZDB_FLAG_PHYS;
3840		flagbits['r'] = ZDB_FLAG_RAW;
3841
3842		for (i = 0; i < argc; i++)
3843			zdb_read_block(argv[i], spa);
3844	}
3845
3846	(os != NULL) ? dmu_objset_disown(os, FTAG) : spa_close(spa, FTAG);
3847
3848	fuid_table_destroy();
3849	sa_loaded = B_FALSE;
3850
3851	dump_debug_buffer();
3852
3853	libzfs_fini(g_zfs);
3854	kernel_fini();
3855
3856	return (0);
3857}
3858