xref: /illumos-gate/usr/src/cmd/zdb/zdb.c (revision b0ab67fe)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2011, 2019 by Delphix. All rights reserved.
 * Copyright (c) 2014 Integros [integros.com]
 * Copyright 2017 Nexenta Systems, Inc.
 * Copyright (c) 2017, 2018 Lawrence Livermore National Security, LLC.
 * Copyright 2017 RackTop Systems.
 */

#include <stdio.h>
#include <unistd.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/spa_impl.h>
#include <sys/dmu.h>
#include <sys/zap.h>
#include <sys/fs/zfs.h>
#include <sys/zfs_znode.h>
#include <sys/zfs_sa.h>
#include <sys/sa.h>
#include <sys/sa_impl.h>
#include <sys/vdev.h>
#include <sys/vdev_impl.h>
#include <sys/metaslab_impl.h>
#include <sys/dmu_objset.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_pool.h>
#include <sys/dbuf.h>
#include <sys/zil.h>
#include <sys/zil_impl.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <sys/dmu_traverse.h>
#include <sys/zio_checksum.h>
#include <sys/zio_compress.h>
#include <zfs_fletcher.h>
#include <sys/zfs_fuid.h>
#include <sys/arc.h>
#include <sys/arc_impl.h>
#include <sys/ddt.h>
#include <sys/zfeature.h>
#include <sys/abd.h>
#include <sys/blkptr.h>
#include <sys/dsl_scan.h>
#include <sys/dsl_crypt.h>
#include <zfs_comutil.h>
#include <libcmdutils.h>
#undef verify
#include <libzfs.h>

#include <libnvpair.h>
#include <libzutil.h>

#include "zdb.h"

#define	ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?	\
	zio_compress_table[(idx)].ci_name : "UNKNOWN")
#define	ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?	\
	zio_checksum_table[(idx)].ci_name : "UNKNOWN")
#define	ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?	\
	dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?	\
	dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
#define	ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :		\
	(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ?	\
	DMU_OT_ZAP_OTHER : \
	(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
	DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)

extern int reference_tracking_enable;
extern boolean_t zfs_recover;
extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
extern int zfs_vdev_async_read_max_active;
extern int aok;
extern boolean_t spa_load_verify_dryrun;
extern int zfs_btree_verify_intensity;

static const char cmdname[] = "zdb";
uint8_t dump_opt[256];

typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);

uint64_t *zopt_object = NULL;
static unsigned zopt_objects = 0;
uint64_t max_inflight = 1000;
static int leaked_objects = 0;

static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
static void mos_obj_refd(uint64_t);

/*
 * These libumem hooks provide a reasonable set of defaults for the allocator's
 * debugging facilities.
 */
const char *
_umem_debug_init()
{
	return ("default,verbose"); /* $UMEM_DEBUG setting */
}

const char *
_umem_logging_init(void)
{
	return ("fail,contents"); /* $UMEM_LOGGING setting */
}

static void
usage(void)
{
	(void) fprintf(stderr,
	    "Usage:\t%s [-AbcdDFGhikLMPsvX] [-e [-V] [-p <path> ...]] "
	    "[-I <inflight I/Os>]\n"
	    "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
	    "\t\t[<poolname> [<object> ...]]\n"
	    "\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset> "
	    "[<object> ...]\n"
	    "\t%s -C [-A] [-U <cache>]\n"
	    "\t%s -l [-Aqu] <device>\n"
	    "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
	    "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
	    "\t%s -O <dataset> <path>\n"
	    "\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
	    "\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
	    "\t%s -E [-A] word0:word1:...:word15\n"
	    "\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
	    "<poolname>\n\n",
	    cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
	    cmdname, cmdname);

	(void) fprintf(stderr, "    Dataset name must include at least one "
	    "separator character '/' or '@'\n");
	(void) fprintf(stderr, "    If dataset name is specified, only that "
	    "dataset is dumped\n");
	(void) fprintf(stderr, "    If object numbers are specified, only "
	    "those objects are dumped\n\n");
	(void) fprintf(stderr, "    Options to control amount of output:\n");
	(void) fprintf(stderr, "        -b block statistics\n");
	(void) fprintf(stderr, "        -c checksum all metadata (twice for "
	    "all data) blocks\n");
	(void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
	(void) fprintf(stderr, "        -d dataset(s)\n");
	(void) fprintf(stderr, "        -D dedup statistics\n");
	(void) fprintf(stderr, "        -E decode and display block from an "
	    "embedded block pointer\n");
	(void) fprintf(stderr, "        -h pool history\n");
	(void) fprintf(stderr, "        -i intent logs\n");
	(void) fprintf(stderr, "        -l read label contents\n");
	(void) fprintf(stderr, "        -k examine the checkpointed state "
	    "of the pool\n");
	(void) fprintf(stderr, "        -L disable leak tracking (do not "
	    "load spacemaps)\n");
	(void) fprintf(stderr, "        -m metaslabs\n");
	(void) fprintf(stderr, "        -M metaslab groups\n");
	(void) fprintf(stderr, "        -O perform object lookups by path\n");
	(void) fprintf(stderr, "        -R read and display block from a "
	    "device\n");
	(void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
	(void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
	(void) fprintf(stderr, "        -v verbose (applies to all "
	    "others)\n\n");
	(void) fprintf(stderr, "    Below options are intended for use "
	    "with other options:\n");
	(void) fprintf(stderr, "        -A ignore assertions (-A), enable "
	    "panic recovery (-AA) or both (-AAA)\n");
	(void) fprintf(stderr, "        -e pool is exported/destroyed/"
	    "has altroot/not in a cachefile\n");
	(void) fprintf(stderr, "        -F attempt automatic rewind within "
	    "safe range of transaction groups\n");
	(void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
	    "exiting\n");
	(void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
	    "specify the maximum number of "
	    "checksumming I/Os [default is 200]\n");
	(void) fprintf(stderr, "        -o <variable>=<value> set global "
	    "variable to an unsigned 32-bit integer value\n");
	(void) fprintf(stderr, "        -p <path> -- use one or more with "
	    "-e to specify path to vdev dir\n");
	(void) fprintf(stderr, "        -P print numbers in parseable form\n");
	(void) fprintf(stderr, "        -q don't print label contents\n");
	(void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
	    "searching for uberblocks\n");
	(void) fprintf(stderr, "        -u uberblock\n");
	(void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
	    "cachefile\n");
	(void) fprintf(stderr, "        -V do verbatim import\n");
	(void) fprintf(stderr, "        -x <dumpdir> -- "
	    "dump all read blocks into specified directory\n");
	(void) fprintf(stderr, "        -X attempt extreme rewind (does not "
	    "work with dataset)\n\n");
	(void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
	    "to make only that option verbose\n");
	(void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
	exit(1);
}

static void
dump_debug_buffer()
{
	if (dump_opt['G']) {
		(void) printf("\n");
		zfs_dbgmsg_print("zdb");
	}
}

/*
 * Called for usage errors that are discovered after a call to spa_open(),
 * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
 */

static void
fatal(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	(void) fprintf(stderr, "%s: ", cmdname);
	(void) vfprintf(stderr, fmt, ap);
	va_end(ap);
	(void) fprintf(stderr, "\n");

	dump_debug_buffer();

	exit(1);
}

/* ARGSUSED */
static void
dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
{
	nvlist_t *nv;
	size_t nvsize = *(uint64_t *)data;
	char *packed = umem_alloc(nvsize, UMEM_NOFAIL);

	VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));

	VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);

	umem_free(packed, nvsize);

	dump_nvlist(nv, 8);

	nvlist_free(nv);
}

/* ARGSUSED */
static void
dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
{
	spa_history_phys_t *shp = data;

	if (shp == NULL)
		return;

	(void) printf("\t\tpool_create_len = %llu\n",
	    (u_longlong_t)shp->sh_pool_create_len);
	(void) printf("\t\tphys_max_off = %llu\n",
	    (u_longlong_t)shp->sh_phys_max_off);
	(void) printf("\t\tbof = %llu\n",
	    (u_longlong_t)shp->sh_bof);
	(void) printf("\t\teof = %llu\n",
	    (u_longlong_t)shp->sh_eof);
	(void) printf("\t\trecords_lost = %llu\n",
	    (u_longlong_t)shp->sh_records_lost);
}

static void
zdb_nicenum(uint64_t num, char *buf, size_t buflen)
{
	if (dump_opt['P'])
		(void) snprintf(buf, buflen, "%llu", (longlong_t)num);
	else
		nicenum(num, buf, sizeof (buf));
}

static const char histo_stars[] = "****************************************";
static const uint64_t histo_width = sizeof (histo_stars) - 1;

static void
dump_histogram(const uint64_t *histo, int size, int offset)
{
	int i;
	int minidx = size - 1;
	int maxidx = 0;
	uint64_t max = 0;

	for (i = 0; i < size; i++) {
		if (histo[i] > max)
			max = histo[i];
		if (histo[i] > 0 && i > maxidx)
			maxidx = i;
		if (histo[i] > 0 && i < minidx)
			minidx = i;
	}

	if (max < histo_width)
		max = histo_width;

	for (i = minidx; i <= maxidx; i++) {
		(void) printf("\t\t\t%3u: %6llu %s\n",
		    i + offset, (u_longlong_t)histo[i],
		    &histo_stars[(max - histo[i]) * histo_width / max]);
	}
}

static void
dump_zap_stats(objset_t *os, uint64_t object)
{
	int error;
	zap_stats_t zs;

	error = zap_get_stats(os, object, &zs);
	if (error)
		return;

	if (zs.zs_ptrtbl_len == 0) {
		ASSERT(zs.zs_num_blocks == 1);
		(void) printf("\tmicrozap: %llu bytes, %llu entries\n",
		    (u_longlong_t)zs.zs_blocksize,
		    (u_longlong_t)zs.zs_num_entries);
		return;
	}

	(void) printf("\tFat ZAP stats:\n");

	(void) printf("\t\tPointer table:\n");
	(void) printf("\t\t\t%llu elements\n",
	    (u_longlong_t)zs.zs_ptrtbl_len);
	(void) printf("\t\t\tzt_blk: %llu\n",
	    (u_longlong_t)zs.zs_ptrtbl_zt_blk);
	(void) printf("\t\t\tzt_numblks: %llu\n",
	    (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
	(void) printf("\t\t\tzt_shift: %llu\n",
	    (u_longlong_t)zs.zs_ptrtbl_zt_shift);
	(void) printf("\t\t\tzt_blks_copied: %llu\n",
	    (u_longlong_t)zs.zs_ptrtbl_blks_copied);
	(void) printf("\t\t\tzt_nextblk: %llu\n",
	    (u_longlong_t)zs.zs_ptrtbl_nextblk);

	(void) printf("\t\tZAP entries: %llu\n",
	    (u_longlong_t)zs.zs_num_entries);
	(void) printf("\t\tLeaf blocks: %llu\n",
	    (u_longlong_t)zs.zs_num_leafs);
	(void) printf("\t\tTotal blocks: %llu\n",
	    (u_longlong_t)zs.zs_num_blocks);
	(void) printf("\t\tzap_block_type: 0x%llx\n",
	    (u_longlong_t)zs.zs_block_type);
	(void) printf("\t\tzap_magic: 0x%llx\n",
	    (u_longlong_t)zs.zs_magic);
	(void) printf("\t\tzap_salt: 0x%llx\n",
	    (u_longlong_t)zs.zs_salt);

	(void) printf("\t\tLeafs with 2^n pointers:\n");
	dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);

	(void) printf("\t\tBlocks with n*5 entries:\n");
	dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);

	(void) printf("\t\tBlocks n/10 full:\n");
	dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);

	(void) printf("\t\tEntries with n chunks:\n");
	dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);

	(void) printf("\t\tBuckets with n entries:\n");
	dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
}

/*ARGSUSED*/
static void
dump_none(objset_t *os, uint64_t object, void *data, size_t size)
{
}

/*ARGSUSED*/
static void
dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
{
	(void) printf("\tUNKNOWN OBJECT TYPE\n");
}

/*ARGSUSED*/
static void
dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
{
}

/*ARGSUSED*/
static void
dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
{
}

/*ARGSUSED*/
static void
dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
{
	zap_cursor_t zc;
	zap_attribute_t attr;
	void *prop;
	unsigned i;

	dump_zap_stats(os, object);
	(void) printf("\n");

	for (zap_cursor_init(&zc, os, object);
	    zap_cursor_retrieve(&zc, &attr) == 0;
	    zap_cursor_advance(&zc)) {
		(void) printf("\t\t%s = ", attr.za_name);
		if (attr.za_num_integers == 0) {
			(void) printf("\n");
			continue;
		}
		prop = umem_zalloc(attr.za_num_integers *
		    attr.za_integer_length, UMEM_NOFAIL);
		(void) zap_lookup(os, object, attr.za_name,
		    attr.za_integer_length, attr.za_num_integers, prop);
		if (attr.za_integer_length == 1) {
			if (strcmp(attr.za_name,
			    DSL_CRYPTO_KEY_MASTER_KEY) == 0 ||
			    strcmp(attr.za_name,
			    DSL_CRYPTO_KEY_HMAC_KEY) == 0 ||
			    strcmp(attr.za_name, DSL_CRYPTO_KEY_IV) == 0 ||
			    strcmp(attr.za_name, DSL_CRYPTO_KEY_MAC) == 0 ||
			    strcmp(attr.za_name, DMU_POOL_CHECKSUM_SALT) == 0) {
				uint8_t *u8 = prop;

				for (i = 0; i < attr.za_num_integers; i++) {
					(void) printf("%02x", u8[i]);
				}
			} else {
				(void) printf("%s", (char *)prop);
			}
		} else {
			for (i = 0; i < attr.za_num_integers; i++) {
				switch (attr.za_integer_length) {
				case 2:
					(void) printf("%u ",
					    ((uint16_t *)prop)[i]);
					break;
				case 4:
					(void) printf("%u ",
					    ((uint32_t *)prop)[i]);
					break;
				case 8:
					(void) printf("%lld ",
					    (u_longlong_t)((int64_t *)prop)[i]);
					break;
				}
			}
		}
		(void) printf("\n");
		umem_free(prop, attr.za_num_integers * attr.za_integer_length);
	}
	zap_cursor_fini(&zc);
}

static void
dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
{
	bpobj_phys_t *bpop = data;
	char bytes[32], comp[32], uncomp[32];

	/* make sure the output won't get truncated */
	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);

	if (bpop == NULL)
		return;

	zdb_nicenum(bpop->bpo_bytes, bytes, sizeof (bytes));
	zdb_nicenum(bpop->bpo_comp, comp, sizeof (comp));
	zdb_nicenum(bpop->bpo_uncomp, uncomp, sizeof (uncomp));

	(void) printf("\t\tnum_blkptrs = %llu\n",
	    (u_longlong_t)bpop->bpo_num_blkptrs);
	(void) printf("\t\tbytes = %s\n", bytes);
	if (size >= BPOBJ_SIZE_V1) {
		(void) printf("\t\tcomp = %s\n", comp);
		(void) printf("\t\tuncomp = %s\n", uncomp);
	}
	if (size >= sizeof (*bpop)) {
		(void) printf("\t\tsubobjs = %llu\n",
		    (u_longlong_t)bpop->bpo_subobjs);
		(void) printf("\t\tnum_subobjs = %llu\n",
		    (u_longlong_t)bpop->bpo_num_subobjs);
	}

	if (dump_opt['d'] < 5)
		return;

	for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
		char blkbuf[BP_SPRINTF_LEN];
		blkptr_t bp;

		int err = dmu_read(os, object,
		    i * sizeof (bp), sizeof (bp), &bp, 0);
		if (err != 0) {
			(void) printf("got error %u from dmu_read\n", err);
			break;
		}
		snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
		(void) printf("\t%s\n", blkbuf);
	}
}

/* ARGSUSED */
static void
dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
{
	dmu_object_info_t doi;

	VERIFY0(dmu_object_info(os, object, &doi));
	uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);

	int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
	if (err != 0) {
		(void) printf("got error %u from dmu_read\n", err);
		kmem_free(subobjs, doi.doi_max_offset);
		return;
	}

	int64_t last_nonzero = -1;
	for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
		if (subobjs[i] != 0)
			last_nonzero = i;
	}

	for (int64_t i = 0; i <= last_nonzero; i++) {
		(void) printf("\t%llu\n", (longlong_t)subobjs[i]);
	}
	kmem_free(subobjs, doi.doi_max_offset);
}

/*ARGSUSED*/
static void
dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
{
	dump_zap_stats(os, object);
	/* contents are printed elsewhere, properly decoded */
}

/*ARGSUSED*/
static void
dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
{
	zap_cursor_t zc;
	zap_attribute_t attr;

	dump_zap_stats(os, object);
	(void) printf("\n");

	for (zap_cursor_init(&zc, os, object);
	    zap_cursor_retrieve(&zc, &attr) == 0;
	    zap_cursor_advance(&zc)) {
		(void) printf("\t\t%s = ", attr.za_name);
		if (attr.za_num_integers == 0) {
			(void) printf("\n");
			continue;
		}
		(void) printf(" %llx : [%d:%d:%d]\n",
		    (u_longlong_t)attr.za_first_integer,
		    (int)ATTR_LENGTH(attr.za_first_integer),
		    (int)ATTR_BSWAP(attr.za_first_integer),
		    (int)ATTR_NUM(attr.za_first_integer));
	}
	zap_cursor_fini(&zc);
}

/*ARGSUSED*/
static void
dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
{
	zap_cursor_t zc;
	zap_attribute_t attr;
	uint16_t *layout_attrs;
	unsigned i;

	dump_zap_stats(os, object);
	(void) printf("\n");

	for (zap_cursor_init(&zc, os, object);
	    zap_cursor_retrieve(&zc, &attr) == 0;
	    zap_cursor_advance(&zc)) {
		(void) printf("\t\t%s = [", attr.za_name);
		if (attr.za_num_integers == 0) {
			(void) printf("\n");
			continue;
		}

		VERIFY(attr.za_integer_length == 2);
		layout_attrs = umem_zalloc(attr.za_num_integers *
		    attr.za_integer_length, UMEM_NOFAIL);

		VERIFY(zap_lookup(os, object, attr.za_name,
		    attr.za_integer_length,
		    attr.za_num_integers, layout_attrs) == 0);

		for (i = 0; i != attr.za_num_integers; i++)
			(void) printf(" %d ", (int)layout_attrs[i]);
		(void) printf("]\n");
		umem_free(layout_attrs,
		    attr.za_num_integers * attr.za_integer_length);
	}
	zap_cursor_fini(&zc);
}

/*ARGSUSED*/
static void
dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
{
	zap_cursor_t zc;
	zap_attribute_t attr;
	const char *typenames[] = {
		/* 0 */ "not specified",
		/* 1 */ "FIFO",
		/* 2 */ "Character Device",
		/* 3 */ "3 (invalid)",
		/* 4 */ "Directory",
		/* 5 */ "5 (invalid)",
		/* 6 */ "Block Device",
		/* 7 */ "7 (invalid)",
		/* 8 */ "Regular File",
		/* 9 */ "9 (invalid)",
		/* 10 */ "Symbolic Link",
		/* 11 */ "11 (invalid)",
		/* 12 */ "Socket",
		/* 13 */ "Door",
		/* 14 */ "Event Port",
		/* 15 */ "15 (invalid)",
	};

	dump_zap_stats(os, object);
	(void) printf("\n");

	for (zap_cursor_init(&zc, os, object);
	    zap_cursor_retrieve(&zc, &attr) == 0;
	    zap_cursor_advance(&zc)) {
		(void) printf("\t\t%s = %lld (type: %s)\n",
		    attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
		    typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
	}
	zap_cursor_fini(&zc);
}

static int
get_dtl_refcount(vdev_t *vd)
{
	int refcount = 0;

	if (vd->vdev_ops->vdev_op_leaf) {
		space_map_t *sm = vd->vdev_dtl_sm;

		if (sm != NULL &&
		    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
			return (1);
		return (0);
	}

	for (unsigned c = 0; c < vd->vdev_children; c++)
		refcount += get_dtl_refcount(vd->vdev_child[c]);
	return (refcount);
}

static int
get_metaslab_refcount(vdev_t *vd)
{
	int refcount = 0;

	if (vd->vdev_top == vd) {
		for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
			space_map_t *sm = vd->vdev_ms[m]->ms_sm;

			if (sm != NULL &&
			    sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
				refcount++;
		}
	}
	for (unsigned c = 0; c < vd->vdev_children; c++)
		refcount += get_metaslab_refcount(vd->vdev_child[c]);

	return (refcount);
}

static int
get_obsolete_refcount(vdev_t *vd)
{
	int refcount = 0;

	uint64_t obsolete_sm_obj = vdev_obsolete_sm_object(vd);
	if (vd->vdev_top == vd && obsolete_sm_obj != 0) {
		dmu_object_info_t doi;
		VERIFY0(dmu_object_info(vd->vdev_spa->spa_meta_objset,
		    obsolete_sm_obj, &doi));
		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
			refcount++;
		}
	} else {
		ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
		ASSERT3U(obsolete_sm_obj, ==, 0);
	}
	for (unsigned c = 0; c < vd->vdev_children; c++) {
		refcount += get_obsolete_refcount(vd->vdev_child[c]);
	}

	return (refcount);
}

static int
get_prev_obsolete_spacemap_refcount(spa_t *spa)
{
	uint64_t prev_obj =
	    spa->spa_condensing_indirect_phys.scip_prev_obsolete_sm_object;
	if (prev_obj != 0) {
		dmu_object_info_t doi;
		VERIFY0(dmu_object_info(spa->spa_meta_objset, prev_obj, &doi));
		if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
			return (1);
		}
	}
	return (0);
}

static int
get_checkpoint_refcount(vdev_t *vd)
{
	int refcount = 0;

	if (vd->vdev_top == vd && vd->vdev_top_zap != 0 &&
	    zap_contains(spa_meta_objset(vd->vdev_spa),
	    vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) == 0)
		refcount++;

	for (uint64_t c = 0; c < vd->vdev_children; c++)
		refcount += get_checkpoint_refcount(vd->vdev_child[c]);

	return (refcount);
}

static int
get_log_spacemap_refcount(spa_t *spa)
{
	return (avl_numnodes(&spa->spa_sm_logs_by_txg));
}

static int
verify_spacemap_refcounts(spa_t *spa)
{
	uint64_t expected_refcount = 0;
	uint64_t actual_refcount;

	(void) feature_get_refcount(spa,
	    &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
	    &expected_refcount);
	actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
	actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
	actual_refcount += get_obsolete_refcount(spa->spa_root_vdev);
	actual_refcount += get_prev_obsolete_spacemap_refcount(spa);
	actual_refcount += get_checkpoint_refcount(spa->spa_root_vdev);
	actual_refcount += get_log_spacemap_refcount(spa);

	if (expected_refcount != actual_refcount) {
		(void) printf("space map refcount mismatch: expected %lld != "
		    "actual %lld\n",
		    (longlong_t)expected_refcount,
		    (longlong_t)actual_refcount);
		return (2);
	}
	return (0);
}

static void
dump_spacemap(objset_t *os, space_map_t *sm)
{
	char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
	    "INVALID", "INVALID", "INVALID", "INVALID" };

	if (sm == NULL)
		return;

	(void) printf("space map object %llu:\n",
	    (longlong_t)sm->sm_object);
	(void) printf("  smp_length = 0x%llx\n",
	    (longlong_t)sm->sm_phys->smp_length);
	(void) printf("  smp_alloc = 0x%llx\n",
	    (longlong_t)sm->sm_phys->smp_alloc);

	if (dump_opt['d'] < 6 && dump_opt['m'] < 4)
		return;

	/*
	 * Print out the freelist entries in both encoded and decoded form.
	 */
	uint8_t mapshift = sm->sm_shift;
	int64_t alloc = 0;
	uint64_t word, entry_id = 0;
	for (uint64_t offset = 0; offset < space_map_length(sm);
	    offset += sizeof (word)) {

		VERIFY0(dmu_read(os, space_map_object(sm), offset,
		    sizeof (word), &word, DMU_READ_PREFETCH));

		if (sm_entry_is_debug(word)) {
			(void) printf("\t    [%6llu] %s: txg %llu pass %llu\n",
			    (u_longlong_t)entry_id,
			    ddata[SM_DEBUG_ACTION_DECODE(word)],
			    (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
			    (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
			entry_id++;
			continue;
		}

		uint8_t words;
		char entry_type;
		uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;

		if (sm_entry_is_single_word(word)) {
			entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
			    'A' : 'F';
			entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
			    sm->sm_start;
			entry_run = SM_RUN_DECODE(word) << mapshift;
			words = 1;
		} else {
			/* it is a two-word entry so we read another word */
			ASSERT(sm_entry_is_double_word(word));

			uint64_t extra_word;
			offset += sizeof (extra_word);
			VERIFY0(dmu_read(os, space_map_object(sm), offset,
			    sizeof (extra_word), &extra_word,
			    DMU_READ_PREFETCH));

			ASSERT3U(offset, <=, space_map_length(sm));

			entry_run = SM2_RUN_DECODE(word) << mapshift;
			entry_vdev = SM2_VDEV_DECODE(word);
			entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
			    'A' : 'F';
			entry_off = (SM2_OFFSET_DECODE(extra_word) <<
			    mapshift) + sm->sm_start;
			words = 2;
		}

		(void) printf("\t    [%6llu]    %c  range:"
		    " %010llx-%010llx  size: %06llx vdev: %06llu words: %u\n",
		    (u_longlong_t)entry_id,
		    entry_type, (u_longlong_t)entry_off,
		    (u_longlong_t)(entry_off + entry_run),
		    (u_longlong_t)entry_run,
		    (u_longlong_t)entry_vdev, words);

		if (entry_type == 'A')
			alloc += entry_run;
		else
			alloc -= entry_run;
		entry_id++;
	}
	if (alloc != space_map_allocated(sm)) {
		(void) printf("space_map_object alloc (%lld) INCONSISTENT "
		    "with space map summary (%lld)\n",
		    (longlong_t)space_map_allocated(sm), (longlong_t)alloc);
	}
}

static void
dump_metaslab_stats(metaslab_t *msp)
{
	char maxbuf[32];
	range_tree_t *rt = msp->ms_allocatable;
	zfs_btree_t *t = &msp->ms_allocatable_by_size;
	int free_pct = range_tree_space(rt) * 100 / msp->ms_size;

	/* max sure nicenum has enough space */
	CTASSERT(sizeof (maxbuf) >= NN_NUMBUF_SZ);

	zdb_nicenum(metaslab_largest_allocatable(msp), maxbuf, sizeof (maxbuf));

	(void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
	    "segments", zfs_btree_numnodes(t), "maxsize", maxbuf,
	    "freepct", free_pct);
	(void) printf("\tIn-memory histogram:\n");
	dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
}

static void
dump_metaslab(metaslab_t *msp)
{
	vdev_t *vd = msp->ms_group->mg_vd;
	spa_t *spa = vd->vdev_spa;
	space_map_t *sm = msp->ms_sm;
	char freebuf[32];

	zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf,
	    sizeof (freebuf));

	(void) printf(
	    "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
	    (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
	    (u_longlong_t)space_map_object(sm), freebuf);

	if (dump_opt['m'] > 2 && !dump_opt['L']) {
		mutex_enter(&msp->ms_lock);
		VERIFY0(metaslab_load(msp));
		range_tree_stat_verify(msp->ms_allocatable);
		dump_metaslab_stats(msp);
		metaslab_unload(msp);
		mutex_exit(&msp->ms_lock);
	}

	if (dump_opt['m'] > 1 && sm != NULL &&
	    spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
		/*
		 * The space map histogram represents free space in chunks
		 * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
		 */
		(void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
		    (u_longlong_t)msp->ms_fragmentation);
		dump_histogram(sm->sm_phys->smp_histogram,
		    SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
	}

	ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
	dump_spacemap(spa->spa_meta_objset, msp->ms_sm);

	if (spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP)) {
		(void) printf("\tFlush data:\n\tunflushed txg=%llu\n\n",
		    (u_longlong_t)metaslab_unflushed_txg(msp));
	}
}

static void
print_vdev_metaslab_header(vdev_t *vd)
{
	vdev_alloc_bias_t alloc_bias = vd->vdev_alloc_bias;
	const char *bias_str = "";

	if (alloc_bias == VDEV_BIAS_LOG || vd->vdev_islog) {
		bias_str = VDEV_ALLOC_BIAS_LOG;
	} else if (alloc_bias == VDEV_BIAS_SPECIAL) {
		bias_str = VDEV_ALLOC_BIAS_SPECIAL;
	} else if (alloc_bias == VDEV_BIAS_DEDUP) {
		bias_str = VDEV_ALLOC_BIAS_DEDUP;
	}

	uint64_t ms_flush_data_obj = 0;
	if (vd->vdev_top_zap != 0) {
		int error = zap_lookup(spa_meta_objset(vd->vdev_spa),
		    vd->vdev_top_zap, VDEV_TOP_ZAP_MS_UNFLUSHED_PHYS_TXGS,
		    sizeof (uint64_t), 1, &ms_flush_data_obj);
		if (error != ENOENT) {
			ASSERT0(error);
		}
	}

	(void) printf("\tvdev %10llu   %s",
	    (u_longlong_t)vd->vdev_id, bias_str);

	if (ms_flush_data_obj != 0) {
		(void) printf("   ms_unflushed_phys object %llu",
		    (u_longlong_t)ms_flush_data_obj);
	}

	(void) printf("\n\t%-10s%5llu   %-19s   %-15s   %-12s\n",
	    "metaslabs", (u_longlong_t)vd->vdev_ms_count,
	    "offset", "spacemap", "free");
	(void) printf("\t%15s   %19s   %15s   %12s\n",
	    "---------------", "-------------------",
	    "---------------", "------------");
}

static void
dump_metaslab_groups(spa_t *spa)
{
	vdev_t *rvd = spa->spa_root_vdev;
	metaslab_class_t *mc = spa_normal_class(spa);
	uint64_t fragmentation;

	metaslab_class_histogram_verify(mc);

	for (unsigned c = 0; c < rvd->vdev_children; c++) {
		vdev_t *tvd = rvd->vdev_child[c];
		metaslab_group_t *mg = tvd->vdev_mg;

		if (mg == NULL || mg->mg_class != mc)
			continue;

		metaslab_group_histogram_verify(mg);
		mg->mg_fragmentation = metaslab_group_fragmentation(mg);

		(void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
		    "fragmentation",
		    (u_longlong_t)tvd->vdev_id,
		    (u_longlong_t)tvd->vdev_ms_count);
		if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
			(void) printf("%3s\n", "-");
		} else {
			(void) printf("%3llu%%\n",
			    (u_longlong_t)mg->mg_fragmentation);
		}
		dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
	}

	(void) printf("\tpool %s\tfragmentation", spa_name(spa));
	fragmentation = metaslab_class_fragmentation(mc);
	if (fragmentation == ZFS_FRAG_INVALID)
		(void) printf("\t%3s\n", "-");
	else
		(void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
	dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
}

static void
print_vdev_indirect(vdev_t *vd)
{
	vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
	vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
	vdev_indirect_births_t *vib = vd->vdev_indirect_births;

	if (vim == NULL) {
		ASSERT3P(vib, ==, NULL);
		return;
	}

	ASSERT3U(vdev_indirect_mapping_object(vim), ==,
	    vic->vic_mapping_object);
	ASSERT3U(vdev_indirect_births_object(vib), ==,
	    vic->vic_births_object);

	(void) printf("indirect births obj %llu:\n",
	    (longlong_t)vic->vic_births_object);
	(void) printf("    vib_count = %llu\n",
	    (longlong_t)vdev_indirect_births_count(vib));
	for (uint64_t i = 0; i < vdev_indirect_births_count(vib); i++) {
		vdev_indirect_birth_entry_phys_t *cur_vibe =
		    &vib->vib_entries[i];
		(void) printf("\toffset %llx -> txg %llu\n",
		    (longlong_t)cur_vibe->vibe_offset,
		    (longlong_t)cur_vibe->vibe_phys_birth_txg);
	}
	(void) printf("\n");

	(void) printf("indirect mapping obj %llu:\n",
	    (longlong_t)vic->vic_mapping_object);
	(void) printf("    vim_max_offset = 0x%llx\n",
	    (longlong_t)vdev_indirect_mapping_max_offset(vim));
	(void) printf("    vim_bytes_mapped = 0x%llx\n",
	    (longlong_t)vdev_indirect_mapping_bytes_mapped(vim));
	(void) printf("    vim_count = %llu\n",
	    (longlong_t)vdev_indirect_mapping_num_entries(vim));

	if (dump_opt['d'] <= 5 && dump_opt['m'] <= 3)
		return;

	uint32_t *counts = vdev_indirect_mapping_load_obsolete_counts(vim);

	for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
		vdev_indirect_mapping_entry_phys_t *vimep =
		    &vim->vim_entries[i];
		(void) printf("\t<%llx:%llx:%llx> -> "
		    "<%llx:%llx:%llx> (%x obsolete)\n",
		    (longlong_t)vd->vdev_id,
		    (longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
		    (longlong_t)DVA_GET_VDEV(&vimep->vimep_dst),
		    (longlong_t)DVA_GET_OFFSET(&vimep->vimep_dst),
		    (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
		    counts[i]);
	}
	(void) printf("\n");

	uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd);
	if (obsolete_sm_object != 0) {
		objset_t *mos = vd->vdev_spa->spa_meta_objset;
		(void) printf("obsolete space map object %llu:\n",
		    (u_longlong_t)obsolete_sm_object);
		ASSERT(vd->vdev_obsolete_sm != NULL);
		ASSERT3U(space_map_object(vd->vdev_obsolete_sm), ==,
		    obsolete_sm_object);
		dump_spacemap(mos, vd->vdev_obsolete_sm);
		(void) printf("\n");
	}
}

static void
dump_metaslabs(spa_t *spa)
{
	vdev_t *vd, *rvd = spa->spa_root_vdev;
	uint64_t m, c = 0, children = rvd->vdev_children;

	(void) printf("\nMetaslabs:\n");

	if (!dump_opt['d'] && zopt_objects > 0) {
		c = zopt_object[0];

		if (c >= children)
			(void) fatal("bad vdev id: %llu", (u_longlong_t)c);

		if (zopt_objects > 1) {
			vd = rvd->vdev_child[c];
			print_vdev_metaslab_header(vd);

			for (m = 1; m < zopt_objects; m++) {
				if (zopt_object[m] < vd->vdev_ms_count)
					dump_metaslab(
					    vd->vdev_ms[zopt_object[m]]);
				else
					(void) fprintf(stderr, "bad metaslab "
					    "number %llu\n",
					    (u_longlong_t)zopt_object[m]);
			}
			(void) printf("\n");
			return;
		}
		children = c + 1;
	}
	for (; c < children; c++) {
		vd = rvd->vdev_child[c];
		print_vdev_metaslab_header(vd);

		print_vdev_indirect(vd);

		for (m = 0; m < vd->vdev_ms_count; m++)
			dump_metaslab(vd->vdev_ms[m]);
		(void) printf("\n");
	}
}

static void
dump_log_spacemaps(spa_t *spa)
{
	if (!spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP))
		return;

	(void) printf("\nLog Space Maps in Pool:\n");
	for (spa_log_sm_t *sls = avl_first(&spa->spa_sm_logs_by_txg);
	    sls; sls = AVL_NEXT(&spa->spa_sm_logs_by_txg, sls)) {
		space_map_t *sm = NULL;
		VERIFY0(space_map_open(&sm, spa_meta_objset(spa),
		    sls->sls_sm_obj, 0, UINT64_MAX, SPA_MINBLOCKSHIFT));

		(void) printf("Log Spacemap object %llu txg %llu\n",
		    (u_longlong_t)sls->sls_sm_obj, (u_longlong_t)sls->sls_txg);
		dump_spacemap(spa->spa_meta_objset, sm);
		space_map_close(sm);
	}
	(void) printf("\n");
}

static void
dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
{
	const ddt_phys_t *ddp = dde->dde_phys;
	const ddt_key_t *ddk = &dde->dde_key;
	const char *types[4] = { "ditto", "single", "double", "triple" };
	char blkbuf[BP_SPRINTF_LEN];
	blkptr_t blk;

	for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
		if (ddp->ddp_phys_birth == 0)
			continue;
		ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
		snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
		(void) printf("index %llx refcnt %llu %s %s\n",
		    (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
		    types[p], blkbuf);
	}
}

static void
dump_dedup_ratio(const ddt_stat_t *dds)
{
	double rL, rP, rD, D, dedup, compress, copies;

	if (dds->dds_blocks == 0)
		return;

	rL = (double)dds->dds_ref_lsize;
	rP = (double)dds->dds_ref_psize;
	rD = (double)dds->dds_ref_dsize;
	D = (double)dds->dds_dsize;

	dedup = rD / D;
	compress = rL / rP;
	copies = rD / rP;

	(void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
	    "dedup * compress / copies = %.2f\n\n",
	    dedup, compress, copies, dedup * compress / copies);
}

static void
dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
{
	char name[DDT_NAMELEN];
	ddt_entry_t dde;
	uint64_t walk = 0;
	dmu_object_info_t doi;
	uint64_t count, dspace, mspace;
	int error;

	error = ddt_object_info(ddt, type, class, &doi);

	if (error == ENOENT)
		return;
	ASSERT(error == 0);

	if ((count = ddt_object_count(ddt, type, class)) == 0)
		return;

	dspace = doi.doi_physical_blocks_512 << 9;
	mspace = doi.doi_fill_count * doi.doi_data_block_size;

	ddt_object_name(ddt, type, class, name);

	(void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
	    name,
	    (u_longlong_t)count,
	    (u_longlong_t)(dspace / count),
	    (u_longlong_t)(mspace / count));

	if (dump_opt['D'] < 3)
		return;

	zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);

	if (dump_opt['D'] < 4)
		return;

	if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
		return;

	(void) printf("%s contents:\n\n", name);

	while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
		dump_dde(ddt, &dde, walk);

	ASSERT3U(error, ==, ENOENT);

	(void) printf("\n");
}

static void
dump_all_ddts(spa_t *spa)
{
	ddt_histogram_t ddh_total;
	ddt_stat_t dds_total;

	bzero(&ddh_total, sizeof (ddh_total));
	bzero(&dds_total, sizeof (dds_total));

	for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
		ddt_t *ddt = spa->spa_ddt[c];
		for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
			for (enum ddt_class class = 0; class < DDT_CLASSES;
			    class++) {
				dump_ddt(ddt, type, class);
			}
		}
	}

	ddt_get_dedup_stats(spa, &dds_total);

	if (dds_total.dds_blocks == 0) {
		(void) printf("All DDTs are empty\n");
		return;
	}

	(void) printf("\n");

	if (dump_opt['D'] > 1) {
		(void) printf("DDT histogram (aggregated over all DDTs):\n");
		ddt_get_dedup_histogram(spa, &ddh_total);
		zpool_dump_ddt(&dds_total, &ddh_total);
	}

	dump_dedup_ratio(&dds_total);
}

static void
dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
{
	char *prefix = arg;

	(void) printf("%s [%llu,%llu) length %llu\n",
	    prefix,
	    (u_longlong_t)start,
	    (u_longlong_t)(start + size),
	    (u_longlong_t)(size));
}

static void
dump_dtl(vdev_t *vd, int indent)
{
	spa_t *spa = vd->vdev_spa;
	boolean_t required;
	const char *name[DTL_TYPES] = { "missing", "partial", "scrub",
		"outage" };
	char prefix[256];

	spa_vdev_state_enter(spa, SCL_NONE);
	required = vdev_dtl_required(vd);
	(void) spa_vdev_state_exit(spa, NULL, 0);

	if (indent == 0)
		(void) printf("\nDirty time logs:\n\n");

	(void) printf("\t%*s%s [%s]\n", indent, "",
	    vd->vdev_path ? vd->vdev_path :
	    vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
	    required ? "DTL-required" : "DTL-expendable");

	for (int t = 0; t < DTL_TYPES; t++) {
		range_tree_t *rt = vd->vdev_dtl[t];
		if (range_tree_space(rt) == 0)
			continue;
		(void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
		    indent + 2, "", name[t]);
		range_tree_walk(rt, dump_dtl_seg, prefix);
		if (dump_opt['d'] > 5 && vd->vdev_children == 0)
			dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
	}

	for (unsigned c = 0; c < vd->vdev_children; c++)
		dump_dtl(vd->vdev_child[c], indent + 4);
}

static void
dump_history(spa_t *spa)
{
	nvlist_t **events = NULL;
	uint64_t resid, len, off = 0;
	uint_t num = 0;
	int error;
	char tbuf[30];

	char *buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
	do {
		len = SPA_MAXBLOCKSIZE;

		if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
			(void) fprintf(stderr, "Unable to read history: "
			    "error %d\n", error);
			umem_free(buf, SPA_MAXBLOCKSIZE);
			return;
		}

		if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
			break;

		off -= resid;
	} while (len != 0);
	umem_free(buf, SPA_MAXBLOCKSIZE);

	(void) printf("\nHistory:\n");
	for (unsigned i = 0; i < num; i++) {
		boolean_t printed = B_FALSE;

		if (nvlist_exists(events[i], ZPOOL_HIST_TIME)) {
			time_t tsec;
			struct tm t;

			tsec = fnvlist_lookup_uint64(events[i],
			    ZPOOL_HIST_TIME);
			(void) localtime_r(&tsec, &t);
			(void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
		} else {
			tbuf[0] = '\0';
		}

		if (nvlist_exists(events[i], ZPOOL_HIST_CMD)) {
			(void) printf("%s %s\n", tbuf,
			    fnvlist_lookup_string(events[i], ZPOOL_HIST_CMD));
		} else if (nvlist_exists(events[i], ZPOOL_HIST_INT_EVENT)) {
			uint64_t ievent;

			ievent = fnvlist_lookup_uint64(events[i],
			    ZPOOL_HIST_INT_EVENT);
			if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
				goto next;

			(void) printf(" %s [internal %s txg:%ju] %s\n",
			    tbuf,
			    zfs_history_event_names[ievent],
			    fnvlist_lookup_uint64(events[i],
			    ZPOOL_HIST_TXG),
			    fnvlist_lookup_string(events[i],
			    ZPOOL_HIST_INT_STR));
		} else if (nvlist_exists(events[i], ZPOOL_HIST_INT_NAME)) {
			(void) printf("%s [txg:%ju] %s", tbuf,
			    fnvlist_lookup_uint64(events[i],
			    ZPOOL_HIST_TXG),
			    fnvlist_lookup_string(events[i],
			    ZPOOL_HIST_INT_NAME));

			if (nvlist_exists(events[i], ZPOOL_HIST_DSNAME)) {
				(void) printf(" %s (%llu)",
				    fnvlist_lookup_string(events[i],
				    ZPOOL_HIST_DSNAME),
				    (u_longlong_t)fnvlist_lookup_uint64(
				    events[i],
				    ZPOOL_HIST_DSID));
			}

			(void) printf(" %s\n", fnvlist_lookup_string(events[i],
			    ZPOOL_HIST_INT_STR));
		} else if (nvlist_exists(events[i], ZPOOL_HIST_IOCTL)) {
			(void) printf("%s ioctl %s\n", tbuf,
			    fnvlist_lookup_string(events[i],
			    ZPOOL_HIST_IOCTL));

			if (nvlist_exists(events[i], ZPOOL_HIST_INPUT_NVL)) {
				(void) printf("    input:\n");
				dump_nvlist(fnvlist_lookup_nvlist(events[i],
				    ZPOOL_HIST_INPUT_NVL), 8);
			}
			if (nvlist_exists(events[i], ZPOOL_HIST_OUTPUT_NVL)) {
				(void) printf("    output:\n");
				dump_nvlist(fnvlist_lookup_nvlist(events[i],
				    ZPOOL_HIST_OUTPUT_NVL), 8);
			}
			if (nvlist_exists(events[i], ZPOOL_HIST_ERRNO)) {
				(void) printf("    errno: %lld\n",
				    (longlong_t)fnvlist_lookup_int64(events[i],
				    ZPOOL_HIST_ERRNO));
			}
		} else {
			goto next;
		}

		printed = B_TRUE;
next:
		if (dump_opt['h'] > 1) {
			if (!printed)
				(void) printf("unrecognized record:\n");
			dump_nvlist(events[i], 2);
		}
	}
}

/*ARGSUSED*/
static void
dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
{
}

static uint64_t
blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
    const zbookmark_phys_t *zb)
{
	if (dnp == NULL) {
		ASSERT(zb->zb_level < 0);
		if (zb->zb_object == 0)
			return (zb->zb_blkid);
		return (zb->zb_blkid * BP_GET_LSIZE(bp));
	}

	ASSERT(zb->zb_level >= 0);

	return ((zb->zb_blkid <<
	    (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
	    dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
}

static void
snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
{
	const dva_t *dva = bp->blk_dva;
	unsigned int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;

	if (dump_opt['b'] >= 6) {
		snprintf_blkptr(blkbuf, buflen, bp);
		return;
	}

	if (BP_IS_EMBEDDED(bp)) {
		(void) sprintf(blkbuf,
		    "EMBEDDED et=%u %llxL/%llxP B=%llu",
		    (int)BPE_GET_ETYPE(bp),
		    (u_longlong_t)BPE_GET_LSIZE(bp),
		    (u_longlong_t)BPE_GET_PSIZE(bp),
		    (u_longlong_t)bp->blk_birth);
		return;
	}

	blkbuf[0] = '\0';
	for (unsigned int i = 0; i < ndvas; i++)
		(void) snprintf(blkbuf + strlen(blkbuf),
		    buflen - strlen(blkbuf), "%llu:%llx:%llx ",
		    (u_longlong_t)DVA_GET_VDEV(&dva[i]),
		    (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
		    (u_longlong_t)DVA_GET_ASIZE(&dva[i]));

	if (BP_IS_HOLE(bp)) {
		(void) snprintf(blkbuf + strlen(blkbuf),
		    buflen - strlen(blkbuf),
		    "%llxL B=%llu",
		    (u_longlong_t)BP_GET_LSIZE(bp),
		    (u_longlong_t)bp->blk_birth);
	} else {
		(void) snprintf(blkbuf + strlen(blkbuf),
		    buflen - strlen(blkbuf),
		    "%llxL/%llxP F=%llu B=%llu/%llu",
		    (u_longlong_t)BP_GET_LSIZE(bp),
		    (u_longlong_t)BP_GET_PSIZE(bp),
		    (u_longlong_t)BP_GET_FILL(bp),
		    (u_longlong_t)bp->blk_birth,
		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
	}
}

static void
print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
    const dnode_phys_t *dnp)
{
	char blkbuf[BP_SPRINTF_LEN];
	int l;

	if (!BP_IS_EMBEDDED(bp)) {
		ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
		ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
	}

	(void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));

	ASSERT(zb->zb_level >= 0);

	for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
		if (l == zb->zb_level) {
			(void) printf("L%llx", (u_longlong_t)zb->zb_level);
		} else {
			(void) printf(" ");
		}
	}

	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
	(void) printf("%s\n", blkbuf);
}

static int
visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
    blkptr_t *bp, const zbookmark_phys_t *zb)
{
	int err = 0;

	if (bp->blk_birth == 0)
		return (0);

	print_indirect(bp, zb, dnp);

	if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
		arc_flags_t flags = ARC_FLAG_WAIT;
		int i;
		blkptr_t *cbp;
		int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
		arc_buf_t *buf;
		uint64_t fill = 0;

		err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
		    ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
		if (err)
			return (err);
		ASSERT(buf->b_data);

		/* recursively visit blocks below this */
		cbp = buf->b_data;
		for (i = 0; i < epb; i++, cbp++) {
			zbookmark_phys_t czb;

			SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
			    zb->zb_level - 1,
			    zb->zb_blkid * epb + i);
			err = visit_indirect(spa, dnp, cbp, &czb);
			if (err)
				break;
			fill += BP_GET_FILL(cbp);
		}
		if (!err)
			ASSERT3U(fill, ==, BP_GET_FILL(bp));
		arc_buf_destroy(buf, &buf);
	}

	return (err);
}

/*ARGSUSED*/
static void
dump_indirect(dnode_t *dn)
{
	dnode_phys_t *dnp = dn->dn_phys;
	int j;
	zbookmark_phys_t czb;

	(void) printf("Indirect blocks:\n");

	SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
	    dn->dn_object, dnp->dn_nlevels - 1, 0);
	for (j = 0; j < dnp->dn_nblkptr; j++) {
		czb.zb_blkid = j;
		(void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
		    &dnp->dn_blkptr[j], &czb);
	}

	(void) printf("\n");
}

/*ARGSUSED*/
static void
dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
{
	dsl_dir_phys_t *dd = data;
	time_t crtime;
	char nice[32];

	/* make sure nicenum has enough space */
	CTASSERT(sizeof (nice) >= NN_NUMBUF_SZ);

	if (dd == NULL)
		return;

	ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));

	crtime = dd->dd_creation_time;
	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
	(void) printf("\t\thead_dataset_obj = %llu\n",
	    (u_longlong_t)dd->dd_head_dataset_obj);
	(void) printf("\t\tparent_dir_obj = %llu\n",
	    (u_longlong_t)dd->dd_parent_obj);
	(void) printf("\t\torigin_obj = %llu\n",
	    (u_longlong_t)dd->dd_origin_obj);
	(void) printf("\t\tchild_dir_zapobj = %llu\n",
	    (u_longlong_t)dd->dd_child_dir_zapobj);
	zdb_nicenum(dd->dd_used_bytes, nice, sizeof (nice));
	(void) printf("\t\tused_bytes = %s\n", nice);
	zdb_nicenum(dd->dd_compressed_bytes, nice, sizeof (nice));
	(void) printf("\t\tcompressed_bytes = %s\n", nice);
	zdb_nicenum(dd->dd_uncompressed_bytes, nice, sizeof (nice));
	(void) printf("\t\tuncompressed_bytes = %s\n", nice);
	zdb_nicenum(dd->dd_quota, nice, sizeof (nice));
	(void) printf("\t\tquota = %s\n", nice);
	zdb_nicenum(dd->dd_reserved, nice, sizeof (nice));
	(void) printf("\t\treserved = %s\n", nice);
	(void) printf("\t\tprops_zapobj = %llu\n",
	    (u_longlong_t)dd->dd_props_zapobj);
	(void) printf("\t\tdeleg_zapobj = %llu\n",
	    (u_longlong_t)dd->dd_deleg_zapobj);
	(void) printf("\t\tflags = %llx\n",
	    (u_longlong_t)dd->dd_flags);

#define	DO(which) \
	zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice, \
	    sizeof (nice)); \
	(void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
	DO(HEAD);
	DO(SNAP);
	DO(CHILD);
	DO(CHILD_RSRV);
	DO(REFRSRV);
#undef DO
	(void) printf("\t\tclones = %llu\n",
	    (u_longlong_t)dd->dd_clones);
}

/*ARGSUSED*/
static void
dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
{
	dsl_dataset_phys_t *ds = data;
	time_t crtime;
	char used[32], compressed[32], uncompressed[32], unique[32];
	char blkbuf[BP_SPRINTF_LEN];

	/* make sure nicenum has enough space */
	CTASSERT(sizeof (used) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (compressed) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (uncompressed) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (unique) >= NN_NUMBUF_SZ);

	if (ds == NULL)
		return;

	ASSERT(size == sizeof (*ds));
	crtime = ds->ds_creation_time;
	zdb_nicenum(ds->ds_referenced_bytes, used, sizeof (used));
	zdb_nicenum(ds->ds_compressed_bytes, compressed, sizeof (compressed));
	zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed,
	    sizeof (uncompressed));
	zdb_nicenum(ds->ds_unique_bytes, unique, sizeof (unique));
	snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);

	(void) printf("\t\tdir_obj = %llu\n",
	    (u_longlong_t)ds->ds_dir_obj);
	(void) printf("\t\tprev_snap_obj = %llu\n",
	    (u_longlong_t)ds->ds_prev_snap_obj);
	(void) printf("\t\tprev_snap_txg = %llu\n",
	    (u_longlong_t)ds->ds_prev_snap_txg);
	(void) printf("\t\tnext_snap_obj = %llu\n",
	    (u_longlong_t)ds->ds_next_snap_obj);
	(void) printf("\t\tsnapnames_zapobj = %llu\n",
	    (u_longlong_t)ds->ds_snapnames_zapobj);
	(void) printf("\t\tnum_children = %llu\n",
	    (u_longlong_t)ds->ds_num_children);
	(void) printf("\t\tuserrefs_obj = %llu\n",
	    (u_longlong_t)ds->ds_userrefs_obj);
	(void) printf("\t\tcreation_time = %s", ctime(&crtime));
	(void) printf("\t\tcreation_txg = %llu\n",
	    (u_longlong_t)ds->ds_creation_txg);
	(void) printf("\t\tdeadlist_obj = %llu\n",
	    (u_longlong_t)ds->ds_deadlist_obj);
	(void) printf("\t\tused_bytes = %s\n", used);
	(void) printf("\t\tcompressed_bytes = %s\n", compressed);
	(void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
	(void) printf("\t\tunique = %s\n", unique);
	(void) printf("\t\tfsid_guid = %llu\n",
	    (u_longlong_t)ds->ds_fsid_guid);
	(void) printf("\t\tguid = %llu\n",
	    (u_longlong_t)ds->ds_guid);
	(void) printf("\t\tflags = %llx\n",
	    (u_longlong_t)ds->ds_flags);
	(void) printf("\t\tnext_clones_obj = %llu\n",
	    (u_longlong_t)ds->ds_next_clones_obj);
	(void) printf("\t\tprops_obj = %llu\n",
	    (u_longlong_t)ds->ds_props_obj);
	(void) printf("\t\tbp = %s\n", blkbuf);
}

/* ARGSUSED */
static int
dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
{
	char blkbuf[BP_SPRINTF_LEN];

	if (bp->blk_birth != 0) {
		snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
		(void) printf("\t%s\n", blkbuf);
	}
	return (0);
}

static void
dump_bptree(objset_t *os, uint64_t obj, const char *name)
{
	char bytes[32];
	bptree_phys_t *bt;
	dmu_buf_t *db;

	/* make sure nicenum has enough space */
	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);

	if (dump_opt['d'] < 3)
		return;

	VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
	bt = db->db_data;
	zdb_nicenum(bt->bt_bytes, bytes, sizeof (bytes));
	(void) printf("\n    %s: %llu datasets, %s\n",
	    name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
	dmu_buf_rele(db, FTAG);

	if (dump_opt['d'] < 5)
		return;

	(void) printf("\n");

	(void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
}

/* ARGSUSED */
static int
dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
{
	char blkbuf[BP_SPRINTF_LEN];

	ASSERT(bp->blk_birth != 0);
	snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
	(void) printf("\t%s\n", blkbuf);
	return (0);
}

static void
dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
{
	char bytes[32];
	char comp[32];
	char uncomp[32];

	/* make sure nicenum has enough space */
	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);

	if (dump_opt['d'] < 3)
		return;

	zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes, sizeof (bytes));
	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
		zdb_nicenum(bpo->bpo_phys->bpo_comp, comp, sizeof (comp));
		zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp, sizeof (uncomp));
		(void) printf("    %*s: object %llu, %llu local blkptrs, "
		    "%llu subobjs in object %llu, %s (%s/%s comp)\n",
		    indent * 8, name,
		    (u_longlong_t)bpo->bpo_object,
		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
		    (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
		    (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
		    bytes, comp, uncomp);

		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
			uint64_t subobj;
			bpobj_t subbpo;
			int error;
			VERIFY0(dmu_read(bpo->bpo_os,
			    bpo->bpo_phys->bpo_subobjs,
			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
			if (error != 0) {
				(void) printf("ERROR %u while trying to open "
				    "subobj id %llu\n",
				    error, (u_longlong_t)subobj);
				continue;
			}
			dump_full_bpobj(&subbpo, "subobj", indent + 1);
			bpobj_close(&subbpo);
		}
	} else {
		(void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
		    indent * 8, name,
		    (u_longlong_t)bpo->bpo_object,
		    (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
		    bytes);
	}

	if (dump_opt['d'] < 5)
		return;


	if (indent == 0) {
		(void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
		(void) printf("\n");
	}
}

static void
bpobj_count_refd(bpobj_t *bpo)
{
	mos_obj_refd(bpo->bpo_object);

	if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
		mos_obj_refd(bpo->bpo_phys->bpo_subobjs);
		for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
			uint64_t subobj;
			bpobj_t subbpo;
			int error;
			VERIFY0(dmu_read(bpo->bpo_os,
			    bpo->bpo_phys->bpo_subobjs,
			    i * sizeof (subobj), sizeof (subobj), &subobj, 0));
			error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
			if (error != 0) {
				(void) printf("ERROR %u while trying to open "
				    "subobj id %llu\n",
				    error, (u_longlong_t)subobj);
				continue;
			}
			bpobj_count_refd(&subbpo);
			bpobj_close(&subbpo);
		}
	}
}

static void
dump_deadlist(dsl_deadlist_t *dl)
{
	dsl_deadlist_entry_t *dle;
	uint64_t unused;
	char bytes[32];
	char comp[32];
	char uncomp[32];
	uint64_t empty_bpobj =
	    dmu_objset_spa(dl->dl_os)->spa_dsl_pool->dp_empty_bpobj;

	/* force the tree to be loaded */
	dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);

	if (dl->dl_oldfmt) {
		if (dl->dl_bpobj.bpo_object != empty_bpobj)
			bpobj_count_refd(&dl->dl_bpobj);
	} else {
		mos_obj_refd(dl->dl_object);
		for (dle = avl_first(&dl->dl_tree); dle;
		    dle = AVL_NEXT(&dl->dl_tree, dle)) {
			if (dle->dle_bpobj.bpo_object != empty_bpobj)
				bpobj_count_refd(&dle->dle_bpobj);
		}
	}

	/* make sure nicenum has enough space */
	CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);

	if (dump_opt['d'] < 3)
		return;

	if (dl->dl_oldfmt) {
		dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
		return;
	}

	zdb_nicenum(dl->dl_phys->dl_used, bytes, sizeof (bytes));
	zdb_nicenum(dl->dl_phys->dl_comp, comp, sizeof (comp));
	zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp, sizeof (uncomp));
	(void) printf("\n    Deadlist: %s (%s/%s comp)\n",
	    bytes, comp, uncomp);

	if (dump_opt['d'] < 4)
		return;

	(void) printf("\n");

	for (dle = avl_first(&dl->dl_tree); dle;
	    dle = AVL_NEXT(&dl->dl_tree, dle)) {
		if (dump_opt['d'] >= 5) {
			char buf[128];
			(void) snprintf(buf, sizeof (buf),
			    "mintxg %llu -> obj %llu",
			    (longlong_t)dle->dle_mintxg,
			    (longlong_t)dle->dle_bpobj.bpo_object);

			dump_full_bpobj(&dle->dle_bpobj, buf, 0);
		} else {
			(void) printf("mintxg %llu -> obj %llu\n",
			    (longlong_t)dle->dle_mintxg,
			    (longlong_t)dle->dle_bpobj.bpo_object);
		}
	}
}

static avl_tree_t idx_tree;
static avl_tree_t domain_tree;
static boolean_t fuid_table_loaded;
static objset_t *sa_os = NULL;
static sa_attr_type_t *sa_attr_table = NULL;

static int
open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
{
	int err;
	uint64_t sa_attrs = 0;
	uint64_t version = 0;

	VERIFY3P(sa_os, ==, NULL);
	err = dmu_objset_own(path, type, B_TRUE, B_FALSE, tag, osp);
	if (err != 0) {
		(void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
		    strerror(err));
		return (err);
	}

	if (dmu_objset_type(*osp) == DMU_OST_ZFS && !(*osp)->os_encrypted) {
		(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
		    8, 1, &version);
		if (version >= ZPL_VERSION_SA) {
			(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
			    8, 1, &sa_attrs);
		}
		err = sa_setup(*osp, sa_attrs, zfs_attr_table, ZPL_END,
		    &sa_attr_table);
		if (err != 0) {
			(void) fprintf(stderr, "sa_setup failed: %s\n",
			    strerror(err));
			dmu_objset_disown(*osp, B_FALSE, tag);
			*osp = NULL;
		}
	}
	sa_os = *osp;

	return (0);
}

static void
close_objset(objset_t *os, void *tag)
{
	VERIFY3P(os, ==, sa_os);
	if (os->os_sa != NULL)
		sa_tear_down(os);
	dmu_objset_disown(os, B_FALSE, tag);
	sa_attr_table = NULL;
	sa_os = NULL;
}

static void
fuid_table_destroy()
{
	if (fuid_table_loaded) {
		zfs_fuid_table_destroy(&idx_tree, &domain_tree);
		fuid_table_loaded = B_FALSE;
	}
}

/*
 * print uid or gid information.
 * For normal POSIX id just the id is printed in decimal format.
 * For CIFS files with FUID the fuid is printed in hex followed by
 * the domain-rid string.
 */
static void
print_idstr(uint64_t id, const char *id_type)
{
	if (FUID_INDEX(id)) {
		char *domain;

		domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
		(void) printf("\t%s     %llx [%s-%d]\n", id_type,
		    (u_longlong_t)id, domain, (int)FUID_RID(id));
	} else {
		(void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
	}

}

static void
dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
{
	uint32_t uid_idx, gid_idx;

	uid_idx = FUID_INDEX(uid);
	gid_idx = FUID_INDEX(gid);

	/* Load domain table, if not already loaded */
	if (!fuid_table_loaded && (uid_idx || gid_idx)) {
		uint64_t fuid_obj;

		/* first find the fuid object.  It lives in the master node */
		VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
		    8, 1, &fuid_obj) == 0);
		zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
		(void) zfs_fuid_table_load(os, fuid_obj,
		    &idx_tree, &domain_tree);
		fuid_table_loaded = B_TRUE;
	}

	print_idstr(uid, "uid");
	print_idstr(gid, "gid");
}

/*ARGSUSED*/
static void
dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
{
	char path[MAXPATHLEN * 2];	/* allow for xattr and failure prefix */
	sa_handle_t *hdl;
	uint64_t xattr, rdev, gen;
	uint64_t uid, gid, mode, fsize, parent, links;
	uint64_t pflags;
	uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
	time_t z_crtime, z_atime, z_mtime, z_ctime;
	sa_bulk_attr_t bulk[12];
	int idx = 0;
	int error;

	VERIFY3P(os, ==, sa_os);
	if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
		(void) printf("Failed to get handle for SA znode\n");
		return;
	}

	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
	    &links, 8);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
	    &mode, 8);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
	    NULL, &parent, 8);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
	    &fsize, 8);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
	    acctm, 16);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
	    modtm, 16);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
	    crtm, 16);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
	    chgtm, 16);
	SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
	    &pflags, 8);

	if (sa_bulk_lookup(hdl, bulk, idx)) {
		(void) sa_handle_destroy(hdl);
		return;
	}

	z_crtime = (time_t)crtm[0];
	z_atime = (time_t)acctm[0];
	z_mtime = (time_t)modtm[0];
	z_ctime = (time_t)chgtm[0];

	if (dump_opt['d'] > 4) {
		error = zfs_obj_to_path(os, object, path, sizeof (path));
		if (error == ESTALE) {
			(void) snprintf(path, sizeof (path), "on delete queue");
		} else if (error != 0) {
			leaked_objects++;
			(void) snprintf(path, sizeof (path),
			    "path not found, possibly leaked");
		}
		(void) printf("\tpath	%s\n", path);
	}
	dump_uidgid(os, uid, gid);
	(void) printf("\tatime	%s", ctime(&z_atime));
	(void) printf("\tmtime	%s", ctime(&z_mtime));
	(void) printf("\tctime	%s", ctime(&z_ctime));
	(void) printf("\tcrtime	%s", ctime(&z_crtime));
	(void) printf("\tgen	%llu\n", (u_longlong_t)gen);
	(void) printf("\tmode	%llo\n", (u_longlong_t)mode);
	(void) printf("\tsize	%llu\n", (u_longlong_t)fsize);
	(void) printf("\tparent	%llu\n", (u_longlong_t)parent);
	(void) printf("\tlinks	%llu\n", (u_longlong_t)links);
	(void) printf("\tpflags	%llx\n", (u_longlong_t)pflags);
	if (dmu_objset_projectquota_enabled(os) && (pflags & ZFS_PROJID)) {
		uint64_t projid;

		if (sa_lookup(hdl, sa_attr_table[ZPL_PROJID], &projid,
		    sizeof (uint64_t)) == 0)
			(void) printf("\tprojid	%llu\n", (u_longlong_t)projid);
	}
	if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
	    sizeof (uint64_t)) == 0)
		(void) printf("\txattr	%llu\n", (u_longlong_t)xattr);
	if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
	    sizeof (uint64_t)) == 0)
		(void) printf("\trdev	0x%016llx\n", (u_longlong_t)rdev);
	sa_handle_destroy(hdl);
}

/*ARGSUSED*/
static void
dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
{
}

/*ARGSUSED*/
static void
dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
{
}


static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
	dump_none,		/* unallocated			*/
	dump_zap,		/* object directory		*/
	dump_uint64,		/* object array			*/
	dump_none,		/* packed nvlist		*/
	dump_packed_nvlist,	/* packed nvlist size		*/
	dump_none,		/* bpobj			*/
	dump_bpobj,		/* bpobj header			*/
	dump_none,		/* SPA space map header		*/
	dump_none,		/* SPA space map		*/
	dump_none,		/* ZIL intent log		*/
	dump_dnode,		/* DMU dnode			*/
	dump_dmu_objset,	/* DMU objset			*/
	dump_dsl_dir,		/* DSL directory		*/
	dump_zap,		/* DSL directory child map	*/
	dump_zap,		/* DSL dataset snap map		*/
	dump_zap,		/* DSL props			*/
	dump_dsl_dataset,	/* DSL dataset			*/
	dump_znode,		/* ZFS znode			*/
	dump_acl,		/* ZFS V0 ACL			*/
	dump_uint8,		/* ZFS plain file		*/
	dump_zpldir,		/* ZFS directory		*/
	dump_zap,		/* ZFS master node		*/
	dump_zap,		/* ZFS delete queue		*/
	dump_uint8,		/* zvol object			*/
	dump_zap,		/* zvol prop			*/
	dump_uint8,		/* other uint8[]		*/
	dump_uint64,		/* other uint64[]		*/
	dump_zap,		/* other ZAP			*/
	dump_zap,		/* persistent error log		*/
	dump_uint8,		/* SPA history			*/
	dump_history_offsets,	/* SPA history offsets		*/
	dump_zap,		/* Pool properties		*/
	dump_zap,		/* DSL permissions		*/
	dump_acl,		/* ZFS ACL			*/
	dump_uint8,		/* ZFS SYSACL			*/
	dump_none,		/* FUID nvlist			*/
	dump_packed_nvlist,	/* FUID nvlist size		*/
	dump_zap,		/* DSL dataset next clones	*/
	dump_zap,		/* DSL scrub queue		*/
	dump_zap,		/* ZFS user/group/project used	*/
	dump_zap,		/* ZFS user/group/project quota	*/
	dump_zap,		/* snapshot refcount tags	*/
	dump_ddt_zap,		/* DDT ZAP object		*/
	dump_zap,		/* DDT statistics		*/
	dump_znode,		/* SA object			*/
	dump_zap,		/* SA Master Node		*/
	dump_sa_attrs,		/* SA attribute registration	*/
	dump_sa_layouts,	/* SA attribute layouts		*/
	dump_zap,		/* DSL scrub translations	*/
	dump_none,		/* fake dedup BP		*/
	dump_zap,		/* deadlist			*/
	dump_none,		/* deadlist hdr			*/
	dump_zap,		/* dsl clones			*/
	dump_bpobj_subobjs,	/* bpobj subobjs		*/
	dump_unknown,		/* Unknown type, must be last	*/
};

static void
dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header,
    uint64_t *dnode_slots_used)
{
	dmu_buf_t *db = NULL;
	dmu_object_info_t doi;
	dnode_t *dn;
	boolean_t dnode_held = B_FALSE;
	void *bonus = NULL;
	size_t bsize = 0;
	char iblk[32], dblk[32], lsize[32], asize[32], fill[32], dnsize[32];
	char bonus_size[32];
	char aux[50];
	int error;

	/* make sure nicenum has enough space */
	CTASSERT(sizeof (iblk) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (dblk) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
	CTASSERT(sizeof (bonus_size) >= NN_NUMBUF_SZ);

	if (*print_header) {
		(void) printf("\n%10s  %3s  %5s  %5s  %5s  %6s  %5s  %6s  %s\n",
		    "Object", "lvl", "iblk", "dblk", "dsize", "dnsize",
		    "lsize", "%full", "type");
		*print_header = 0;
	}

	if (object == 0) {
		dn = DMU_META_DNODE(os);
		dmu_object_info_from_dnode(dn, &doi);
	} else {
		/*
		 * Encrypted datasets will have sensitive bonus buffers
		 * encrypted. Therefore we cannot hold the bonus buffer and
		 * must hold the dnode itself instead.
		 */
		error = dmu_object_info(os, object, &doi);
		if (error)
			fatal("dmu_object_info() failed, errno %u", error);

		if (os->os_encrypted &&
		    DMU_OT_IS_ENCRYPTED(doi.doi_bonus_type)) {
			error = dnode_hold(os, object, FTAG, &dn);
			if (error)
				fatal("dnode_hold() failed, errno %u", error);
			dnode_held = B_TRUE;
		} else {
			error = dmu_bonus_hold(os, object, FTAG, &db);
			if (error)
				fatal("dmu_bonus_hold(%llu) failed, errno %u",
				    object, error);
			bonus = db->db_data;
			bsize = db->db_size;
			dn = DB_DNODE((dmu_buf_impl_t *)db);
		}
	}

	if (dnode_slots_used != NULL)
		*dnode_slots_used = doi.doi_dnodesize / DNODE_MIN_SIZE;

	zdb_nicenum(doi.doi_metadata_block_size, iblk, sizeof (iblk));
	zdb_nicenum(doi.doi_data_block_size, dblk, sizeof (dblk));
	zdb_nicenum(doi.doi_max_offset, lsize, sizeof (lsize));
	zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize, sizeof (asize));
	zdb_nicenum(doi.doi_bonus_size, bonus_size, sizeof (bonus_size));
	zdb_nicenum(doi.doi_dnodesize, dnsize, sizeof (dnsize));
	(void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
	    doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
	    doi.doi_max_offset);

	aux[0] = '\0';

	if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
		(void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
		    ZDB_CHECKSUM_NAME(doi.doi_checksum));
	}

	if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
		(void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
		    ZDB_COMPRESS_NAME(doi.doi_compress));
	}

	(void) printf("%10" PRIu64
	    "  %3u  %5s  %5s  %5s  %5s  %5s  %6s  %s%s\n",
	    object, doi.doi_indirection, iblk, dblk,
	    asize, dnsize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);

	if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
		(void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %5s  %6s  %s\n",
		    "", "", "", "", "", "", bonus_size, "bonus",
		    ZDB_OT_NAME(doi.doi_bonus_type));
	}

	if (verbosity >= 4) {
		(void) printf("\tdnode flags: %s%s%s%s\n",
		    (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
		    "USED_BYTES " : "",
		    (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
		    "USERUSED_ACCOUNTED " : "",
		    (dn->dn_phys->dn_flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) ?
		    "USEROBJUSED_ACCOUNTED " : "",
		    (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
		    "SPILL_BLKPTR" : "");
		(void) printf("\tdnode maxblkid: %llu\n",
		    (longlong_t)dn->dn_phys->dn_maxblkid);

		if (!dnode_held) {
			object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os,
			    object, bonus, bsize);
		} else {
			(void) printf("\t\t(bonus encrypted)\n");
		}

		if (!os->os_encrypted || !DMU_OT_IS_ENCRYPTED(doi.doi_type)) {
			object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object,
			    NULL, 0);
		} else {
			(void) printf("\t\t(object encrypted)\n");
		}

		*print_header = 1;
	}

	if (verbosity >= 5)
		dump_indirect(dn);

	if (verbosity >= 5) {
		/*
		 * Report the list of segments that comprise the object.
		 */
		uint64_t start = 0;
		uint64_t end;
		uint64_t blkfill = 1;
		int minlvl = 1;

		if (dn->dn_type == DMU_OT_DNODE) {
			minlvl = 0;
			blkfill = DNODES_PER_BLOCK;
		}

		for (;;) {
			char segsize[32];
			/* make sure nicenum has enough space */
			CTASSERT(sizeof (segsize) >= NN_NUMBUF_SZ);
			error = dnode_next_offset(dn,
			    0, &start, minlvl, blkfill, 0);
			if (error)
				break;
			end = start;
			error = dnode_next_offset(dn,
			    DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
			zdb_nicenum(end - start, segsize, sizeof (segsize));
			(void) printf("\t\tsegment [%016llx, %016llx)"
			    " size %5s\n", (u_longlong_t)start,
			    (u_longlong_t)end, segsize);
			if (error)
				break;
			start = end;
		}
	}

	if (db != NULL)
		dmu_buf_rele(db, FTAG);
	if (dnode_held)
		dnode_rele(dn, FTAG);
}

static void
count_dir_mos_objects(dsl_dir_t *dd)
{
	mos_obj_refd(dd->dd_object);
	mos_obj_refd(dsl_dir_phys(dd)->dd_child_dir_zapobj);
	mos_obj_refd(dsl_dir_phys(dd)->dd_deleg_zapobj);
	mos_obj_refd(dsl_dir_phys(dd)->dd_props_zapobj);
	mos_obj_refd(dsl_dir_phys(dd)->dd_clones);
}

static void
count_ds_mos_objects(dsl_dataset_t *ds)
{
	mos_obj_refd(ds->ds_object);
	mos_obj_refd(dsl_dataset_phys(ds)->ds_next_clones_obj);
	mos_obj_refd(dsl_dataset_phys(ds)->ds_props_obj);
	mos_obj_refd(dsl_dataset_phys(ds)->ds_userrefs_obj);
	mos_obj_refd(dsl_dataset_phys(ds)->ds_snapnames_zapobj);

	if (!dsl_dataset_is_snapshot(ds)) {
		count_dir_mos_objects(ds->ds_dir);
	}
}

static const char *objset_types[DMU_OST_NUMTYPES] = {
	"NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };

static void
dump_dir(objset_t *os)
{
	dmu_objset_stats_t dds;
	uint64_t object, object_count;
	uint64_t refdbytes, usedobjs, scratch;
	char numbuf[32];
	char blkbuf[BP_SPRINTF_LEN + 20];
	char osname[ZFS_MAX_DATASET_NAME_LEN];
	const char *type = "UNKNOWN";
	int verbosity = dump_opt['d'];
	int print_header = 1;
	unsigned i;
	int error;
	uint64_t total_slots_used = 0;
	uint64_t max_slot_used = 0;
	uint64_t dnode_slots;

	/* make sure nicenum has enough space */
	CTASSERT(sizeof (numbuf) >= NN_NUMBUF_SZ);

	dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
	dmu_objset_fast_stat(os, &dds);
	dsl_pool_config_exit(dmu_objset_pool(os), FTAG);

	if (dds.dds_type < DMU_OST_NUMTYPES)
		type = objset_types[dds.dds_type];

	if (dds.dds_type == DMU_OST_META) {
		dds.dds_creation_txg = TXG_INITIAL;
		usedobjs = BP_GET_FILL(os->os_rootbp);
		refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
		    dd_used_bytes;
	} else {
		dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
	}

	ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));

	zdb_nicenum(refdbytes, numbuf, sizeof (numbuf));

	if (verbosity >= 4) {
		(void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
		(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
		    sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
	} else {
		blkbuf[0] = '\0';
	}

	dmu_objset_name(os, osname);

	(void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
	    "%s, %llu objects%s%s\n",
	    osname, type, (u_longlong_t)dmu_objset_id(os),
	    (u_longlong_t)dds.dds_creation_txg,
	    numbuf, (u_longlong_t)usedobjs, blkbuf,
	    (dds.dds_inconsistent) ? " (inconsistent)" : "");

	if (zopt_objects != 0) {
		for (i = 0; i < zopt_objects; i++)
			dump_object(os, zopt_object[i], verbosity,
			    &print_header, NULL);
		(void) printf("\n");
		return;
	}

	if (dump_opt['i'] != 0 || verbosity >= 2)
		dump_intent_log(dmu_objset_zil(os));

	if (dmu_objset_ds(os) != NULL) {
		dsl_dataset_t *ds = dmu_objset_ds(os);
		dump_deadlist(&ds->ds_deadlist);

		if (dsl_dataset_remap_deadlist_exists(ds)) {
			(void) printf("ds_remap_deadlist:\n");
			dump_deadlist(&ds->ds_remap_deadlist);
		}
		count_ds_mos_objects(ds);
	}

	if (verbosity < 2)
		return;

	if (BP_IS_HOLE(os->os_rootbp))
		return;

	dump_object(os, 0, verbosity, &print_header, NULL);
	object_count = 0;
	if (DMU_USERUSED_DNODE(os) != NULL &&
	    DMU_USERUSED_DNODE(os)->dn_type != 0) {
		dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header,
		    NULL);
		dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header,
		    NULL);
	}

	if (DMU_PROJECTUSED_DNODE(os) != NULL &&
	    DMU_PROJECTUSED_DNODE(os)->dn_type != 0)
		dump_object(os, DMU_PROJECTUSED_OBJECT, verbosity,
		    &print_header, NULL);

	object = 0;
	while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
		dump_object(os, object, verbosity, &print_header, &dnode_slots);
		object_count++;
		total_slots_used += dnode_slots;
		max_slot_used = object + dnode_slots - 1;
	}

	(void) printf("\n");

	(void) printf("    Dnode slots:\n");
	(void) printf("\tTotal used:    %10llu\n",
	    (u_longlong_t)total_slots_used);
	(void) printf("\tMax used:      %10llu\n",
	    (u_longlong_t)max_slot_used);
	(void) printf("\tPercent empty: %10lf\n",
	    (double)(max_slot_used - total_slots_used)*100 /
	    (double)max_slot_used);

	(void) printf("\n");

	if (error != ESRCH) {
		(void) fprintf(stderr, "dmu_object_next() = %d\n", error);
		abort();
	}
	if (leaked_objects != 0) {
		(void) printf("%d potentially leaked objects detected\n",
		    leaked_objects);
		leaked_objects = 0;
	}

	ASSERT3U(object_count, ==, usedobjs);
}

static void
dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
{
	time_t timestamp = ub->ub_timestamp;

	(void) printf("%s", header ? header : "");
	(void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
	(void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
	(void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
	(void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
	(void) printf("\ttimestamp = %llu UTC = %s",
	    (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));

	(void) printf("\tmmp_magic = %016llx\n",
	    (u_longlong_t)ub->ub_mmp_magic);
	if (MMP_VALID(ub)) {
		(void) printf("\tmmp_delay = %0llu\n",
		    (u_longlong_t)ub->ub_mmp_delay);
		if (MMP_SEQ_VALID(ub))
			(void) printf("\tmmp_seq = %u\n",
			    (unsigned int) MMP_SEQ(ub));
		if (MMP_FAIL_INT_VALID(ub))
			(void) printf("\tmmp_fail = %u\n",
			    (unsigned int) MMP_FAIL_INT(ub));
		if (MMP_INTERVAL_VALID(ub))
			(void) printf("\tmmp_write = %u\n",
			    (unsigned int) MMP_INTERVAL(ub));
		/* After MMP_* to make summarize_uberblock_mmp cleaner */
		(void) printf("\tmmp_valid = %x\n",
		    (unsigned int) ub->ub_mmp_config & 0xFF);
	}

	if (dump_opt['u'] >= 4) {
		char blkbuf[BP_SPRINTF_LEN];
		snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
		(void) printf("\trootbp = %s\n", blkbuf);
	}
	(void) printf("\tcheckpoint_txg = %llu\n",
	    (u_longlong_t)ub->ub_checkpoint_txg);
	(void) printf("%s", footer ? footer : "");
}

static void
dump_config(spa_t *spa)
{
	dmu_buf_t *db;
	size_t nvsize = 0;
	int error = 0;


	error = dmu_bonus_hold(spa->spa_meta_objset,
	    spa->spa_config_object, FTAG, &db);

	if (error == 0) {
		nvsize = *(uint64_t *)db->db_data;
		dmu_buf_rele(db, FTAG);

		(void) printf("\nMOS Configuration:\n");
		dump_packed_nvlist(spa->spa_meta_objset,
		    spa->spa_config_object, (void *)&nvsize, 1);
	} else {
		(void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
		    (u_longlong_t)spa->spa_config_object, error);
	}
}

static void
dump_cachefile(const char *cachefile)
{
	int fd;
	struct stat64 statbuf;
	char *buf;
	nvlist_t *config;

	if ((fd = open64(cachefile, O_RDONLY)) < 0) {
		(void) printf("cannot open '%s': %s\n", cachefile,
		    strerror(errno));
		exit(1);
	}

	if (fstat64(fd, &statbuf) != 0) {
		(void) printf("failed to stat '%s': %s\n", cachefile,
		    strerror(errno));
		exit(1);
	}

	if ((buf = malloc(statbuf.st_size)) == NULL) {
		(void) fprintf(stderr, "failed to allocate %llu bytes\n",
		    (u_longlong_t)statbuf.st_size);
		exit(1);
	}

	if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
		(void) fprintf(stderr, "failed to read %llu bytes\n",
		    (u_longlong_t)statbuf.st_size);
		exit(1);
	}

	(void) close(fd);

	if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
		(void) fprintf(stderr, "failed to unpack nvlist\n");
		exit(1);
	}

	free(buf);

	dump_nvlist(config, 0);

	nvlist_free(config);
}

static void
print_l2arc_header(void)
{
	(void) printf("------------------------------------\n");
	(void) printf("L2ARC device header\n");
	(void) printf("------------------------------------\n");
}

static void
print_l2arc_log_blocks(void)
{
	(void) printf("------------------------------------\n");
	(void) printf("L2ARC device log blocks\n");
	(void) printf("------------------------------------\n");
}

static void
dump_l2arc_log_entries(uint64_t log_entries,
    l2arc_log_ent_phys_t *le, uint64_t i)
{
	for (uint64_t j = 0; j < log_entries; j++) {
		dva_t dva = le[j].le_dva;
		(void) printf("lb[%4llu]\tle[%4d]\tDVA asize: %llu, "
		    "vdev: %llu, offset: %llu\n",
		    (u_longlong_t)i, j + 1,
		    (u_longlong_t)DVA_GET_ASIZE(&dva),
		    (u_longlong_t)DVA_GET_VDEV(&dva),
		    (u_longlong_t)DVA_GET_OFFSET(&dva));
		(void) printf("|\t\t\t\tbirth: %llu\n",
		    (u_longlong_t)le[j].le_birth);
		(void) printf("|\t\t\t\tlsize: %llu\n",
		    (u_longlong_t)L2BLK_GET_LSIZE((&le[j])->le_prop));
		(void) printf("|\t\t\t\tpsize: %llu\n",
		    (u_longlong_t)L2BLK_GET_PSIZE((&le[j])->le_prop));
		(void) printf("|\t\t\t\tcompr: %llu\n",
		    (u_longlong_t)L2BLK_GET_COMPRESS((&le[j])->le_prop));
		(void) printf("|\t\t\t\ttype: %llu\n",
		    (u_longlong_t)L2BLK_GET_TYPE((&le[j])->le_prop));
		(void) printf("|\t\t\t\tprotected: %llu\n",
		    (u_longlong_t)L2BLK_GET_PROTECTED((&le[j])->le_prop));
		(void) printf("|\t\t\t\tprefetch: %llu\n",
		    (u_longlong_t)L2BLK_GET_PREFETCH((&le[j])->le_prop));
		(void) printf("|\t\t\t\taddress: %llu\n",
		    (u_longlong_t)le[j].le_daddr);
		(void) printf("|\t\t\t\tARC state: %llu\n",
		    (u_longlong_t)L2BLK_GET_STATE((&le[j])->le_prop));
		(void) printf("|\n");
	}
	(void) printf("\n");
}

static void
dump_l2arc_log_blkptr(l2arc_log_blkptr_t lbps)
{
	(void) printf("|\t\tdaddr: %llu\n", (u_longlong_t)lbps.lbp_daddr);
	(void) printf("|\t\tpayload_asize: %llu\n",
	    (u_longlong_t)lbps.lbp_payload_asize);
	(void) printf("|\t\tpayload_start: %llu\n",
	    (u_longlong_t)lbps.lbp_payload_start);
	(void) printf("|\t\tlsize: %llu\n",
	    (u_longlong_t)L2BLK_GET_LSIZE((&lbps)->lbp_prop));
	(void) printf("|\t\tasize: %llu\n",
	    (u_longlong_t)L2BLK_GET_PSIZE((&lbps)->lbp_prop));
	(void) printf("|\t\tcompralgo: %llu\n",
	    (u_longlong_t)L2BLK_GET_COMPRESS((&lbps)->lbp_prop));
	(void) printf("|\t\tcksumalgo: %llu\n",
	    (u_longlong_t)L2BLK_GET_CHECKSUM((&lbps)->lbp_prop));
	(void) printf("|\n\n");
}

static void
dump_l2arc_log_blocks(int fd, l2arc_dev_hdr_phys_t l2dhdr,
    l2arc_dev_hdr_phys_t *rebuild)
{
	l2arc_log_blk_phys_t this_lb;
	uint64_t asize;
	l2arc_log_blkptr_t lbps[2];
	abd_t *abd;
	zio_cksum_t cksum;
	int failed = 0;
	l2arc_dev_t dev;

	if (!dump_opt['q'])
		print_l2arc_log_blocks();
	bcopy((&l2dhdr)->dh_start_lbps, lbps, sizeof (lbps));

	dev.l2ad_evict = l2dhdr.dh_evict;
	dev.l2ad_start = l2dhdr.dh_start;
	dev.l2ad_end = l2dhdr.dh_end;

	if (l2dhdr.dh_start_lbps[0].lbp_daddr == 0) {
		/* no log blocks to read */
		if (!dump_opt['q']) {
			(void) printf("No log blocks to read\n");
			(void) printf("\n");
		}
		return;
	} else {
		dev.l2ad_hand = lbps[0].lbp_daddr +
		    L2BLK_GET_PSIZE((&lbps[0])->lbp_prop);
	}

	dev.l2ad_first = !!(l2dhdr.dh_flags & L2ARC_DEV_HDR_EVICT_FIRST);

	for (;;) {
		if (!l2arc_log_blkptr_valid(&dev, &lbps[0]))
			break;

		/* L2BLK_GET_PSIZE returns aligned size for log blocks */
		asize = L2BLK_GET_PSIZE((&lbps[0])->lbp_prop);
		if (pread64(fd, &this_lb, asize, lbps[0].lbp_daddr) !=
		    (ssize_t)asize) {
			if (!dump_opt['q']) {
				(void) printf("Error while reading next log "
				    "block\n\n");
			}
			break;
		}

		fletcher_4_native(&this_lb, asize, NULL, &cksum);
		if (!ZIO_CHECKSUM_EQUAL(cksum, lbps[0].lbp_cksum)) {
			failed++;
			if (!dump_opt['q']) {
				(void) printf("Invalid cksum\n");
				dump_l2arc_log_blkptr(lbps[0]);
			}
			break;
		}

		switch (L2BLK_GET_COMPRESS((&lbps[0])->lbp_prop)) {
		case ZIO_COMPRESS_OFF:
			break;
		case ZIO_COMPRESS_LZ4:
			abd = abd_alloc_for_io(asize, B_TRUE);
			abd_copy_from_buf_off(abd, &this_lb, 0, asize);
			zio_decompress_data(L2BLK_GET_COMPRESS(
			    (&lbps[0])->lbp_prop), abd, &this_lb,
			    asize, sizeof (this_lb));
			abd_free(abd);
			break;
		default:
			break;
		}

		if (this_lb.lb_magic == BSWAP_64(L2ARC_LOG_BLK_MAGIC))
			byteswap_uint64_array(&this_lb, sizeof (this_lb));
		if (this_lb.lb_magic != L2ARC_LOG_BLK_MAGIC) {
			if (!dump_opt['q'])
				(void) printf("Invalid log block magic\n\n");
			break;
		}

		rebuild->dh_lb_count++;
		rebuild->dh_lb_asize += asize;
		if (dump_opt['l'] > 1 && !dump_opt['q']) {
			(void) printf("lb[%4llu]\tmagic: %llu\n",
			    (u_longlong_t)rebuild->dh_lb_count,
			    (u_longlong_t)this_lb.lb_magic);
			dump_l2arc_log_blkptr(lbps[0]);
		}

		if (dump_opt['l'] > 2 && !dump_opt['q'])
			dump_l2arc_log_entries(l2dhdr.dh_log_entries,
			    this_lb.lb_entries,
			    rebuild->dh_lb_count);

		if (l2arc_range_check_overlap(lbps[1].lbp_payload_start,
		    lbps[0].lbp_payload_start, dev.l2ad_evict) &&
		    !dev.l2ad_first)
			break;

		lbps[0] = lbps[1];
		lbps[1] = this_lb.lb_prev_lbp;
	}

	if (!dump_opt['q']) {
		(void) printf("log_blk_count:\t %llu with valid cksum\n",
		    (u_longlong_t)rebuild->dh_lb_count);
		(void) printf("\t\t %d with invalid cksum\n", failed);
		(void) printf("log_blk_asize:\t %llu\n\n",
		    (u_longlong_t)rebuild->dh_lb_asize);
	}
}

static int
dump_l2arc_header(int fd)
{
	l2arc_dev_hdr_phys_t l2dhdr, rebuild;
	int error = B_FALSE;

	bzero(&l2dhdr, sizeof (l2dhdr));
	bzero(&rebuild, sizeof (rebuild));

	if (pread64(fd, &l2dhdr, sizeof (l2dhdr),
	    VDEV_LABEL_START_SIZE) != sizeof (l2dhdr)) {
		error = B_TRUE;
	} else {
		if (l2dhdr.dh_magic == BSWAP_64(L2ARC_DEV_HDR_MAGIC))
			byteswap_uint64_array(&l2dhdr, sizeof (l2dhdr));

		if (l2dhdr.dh_magic != L2ARC_DEV_HDR_MAGIC)
			error = B_TRUE;
	}

	if (error) {
		(void) printf("L2ARC device header not found\n\n");
		/* Do not return an error here for backward compatibility */
		return (0);
	} else if (!dump_opt['q']) {
		print_l2arc_header();

		(void) printf("    magic: %llu\n",
		    (u_longlong_t)l2dhdr.dh_magic);
		(void) printf("    version: %llu\n",
		    (u_longlong_t)l2dhdr.dh_version);
		(void) printf("    pool_guid: %llu\n",
		    (u_longlong_t)l2dhdr.dh_spa_guid);
		(void) printf("    flags: %llu\n",
		    (u_longlong_t)l2dhdr.dh_flags);
		(void) printf("    start_lbps[0]: %llu\n",
		    (u_longlong_t)
		    l2dhdr.dh_start_lbps[0].lbp_daddr);
		(void) printf("    start_lbps[1]: %llu\n",
		    (u_longlong_t)
		    l2dhdr.dh_start_lbps[1].lbp_daddr);
		(void) printf("    log_blk_ent: %llu\n",
		    (u_longlong_t)l2dhdr.dh_log_entries);
		(void) printf("    start: %llu\n",
		    (u_longlong_t)l2dhdr.dh_start);
		(void) printf("    end: %llu\n",
		    (u_longlong_t)l2dhdr.dh_end);
		(void) printf("    evict: %llu\n",
		    (u_longlong_t)l2dhdr.dh_evict);
		(void) printf("    lb_asize_refcount: %llu\n",
		    (u_longlong_t)l2dhdr.dh_lb_asize);
		(void) printf("    lb_count_refcount: %llu\n\n",
		    (u_longlong_t)l2dhdr.dh_lb_count);
	}

	dump_l2arc_log_blocks(fd, l2dhdr, &rebuild);
	/*
	 * The total aligned size of log blocks and the number of log blocks
	 * reported in the header of the device may be less than what zdb
	 * reports by dump_l2arc_log_blocks() which emulates l2arc_rebuild().
	 * This happens because dump_l2arc_log_blocks() lacks the memory
	 * pressure valve that l2arc_rebuild() has. Thus, if we are on a system
	 * with low memory, l2arc_rebuild will exit prematurely and dh_lb_asize
	 * and dh_lb_count will be lower to begin with than what exists on the
	 * device. This is normal and zdb should not exit with an error. The
	 * opposite case should never happen though, the values reported in the
	 * header should never be higher than what dump_l2arc_log_blocks() and
	 * l2arc_rebuild() report. If this happens there is a leak in the
	 * accounting of log blocks.
	 */
	if (l2dhdr.dh_lb_asize > rebuild.dh_lb_asize ||
	    l2dhdr.dh_lb_count > rebuild.dh_lb_count)
		return (1);

	return (0);
}

static char curpath[PATH_MAX];

/*
 * Iterate through the path components, recursively passing
 * current one's obj and remaining path until we find the obj
 * for the last one.
 */
static int
dump_path_impl(objset_t *os, uint64_t obj, char *name)
{
	int err;
	int header = 1;
	uint64_t child_obj;
	char *s;
	dmu_buf_t *db;
	dmu_object_info_t doi;

	if ((s = strchr(name, '/')) != NULL)
		*