cddl/contrib/opensolaris/cmd/zdb/zdb.c

   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, 2018 by Delphix. All rights reserved.
  25  * Copyright (c) 2014 Integros [integros.com]
  26  * Copyright 2017 Nexenta Systems, Inc.
  27  * Copyright (c) 2017, 2018 Lawrence Livermore National Security, LLC.
  28  * Copyright 2017 RackTop Systems.
  29  */
  30
  31 #include <stdio.h>
  32 #include <unistd.h>
  33 #include <stdio_ext.h>
  34 #include <stdlib.h>
  35 #include <ctype.h>
  36 #include <sys/zfs_context.h>
  37 #include <sys/spa.h>
  38 #include <sys/spa_impl.h>
  39 #include <sys/dmu.h>
  40 #include <sys/zap.h>
  41 #include <sys/fs/zfs.h>
  42 #include <sys/zfs_znode.h>
  43 #include <sys/zfs_sa.h>
  44 #include <sys/sa.h>
  45 #include <sys/sa_impl.h>
  46 #include <sys/vdev.h>
  47 #include <sys/vdev_impl.h>
  48 #include <sys/metaslab_impl.h>
  49 #include <sys/dmu_objset.h>
  50 #include <sys/dsl_dir.h>
  51 #include <sys/dsl_dataset.h>
  52 #include <sys/dsl_pool.h>
  53 #include <sys/dbuf.h>
  54 #include <sys/zil.h>
  55 #include <sys/zil_impl.h>
  56 #include <sys/stat.h>
  57 #include <sys/resource.h>
  58 #include <sys/dmu_traverse.h>
  59 #include <sys/zio_checksum.h>
  60 #include <sys/zio_compress.h>
  61 #include <sys/zfs_fuid.h>
  62 #include <sys/arc.h>
  63 #include <sys/ddt.h>
  64 #include <sys/zfeature.h>
  65 #include <sys/abd.h>
  66 #include <sys/blkptr.h>
  67 #include <sys/dsl_scan.h>
  68 #include <zfs_comutil.h>
  69 #include <libcmdutils.h>
  70 #undef verify
  71 #include <libzfs.h>
  72
  73 #include "zdb.h"
  74
  75 #define ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?        \
  76         zio_compress_table[(idx)].ci_name : "UNKNOWN")
  77 #define ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?        \
  78         zio_checksum_table[(idx)].ci_name : "UNKNOWN")
  79 #define ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?     \
  80         dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?  \
  81         dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
  82 #define ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :             \
  83         (idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ?    \
  84         DMU_OT_ZAP_OTHER : \
  85         (idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
  86         DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
  87
  88 #ifndef lint
  89 extern int reference_tracking_enable;
  90 extern boolean_t zfs_recover;
  91 extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
  92 extern int zfs_vdev_async_read_max_active;
  93 extern boolean_t spa_load_verify_dryrun;
  94 extern int aok;
  95 #else
  96 int reference_tracking_enable;
  97 boolean_t zfs_recover;
  98 uint64_t zfs_arc_max, zfs_arc_meta_limit;
  99 int zfs_vdev_async_read_max_active;
 100 boolean_t spa_load_verify_dryrun;
 101 int aok;
 102 #endif
 103
 104 static const char cmdname[] = "zdb";
 105 uint8_t dump_opt[256];
 106
 107 typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
 108
 109 static uint64_t *zopt_object = NULL;
 110 static unsigned zopt_objects = 0;
 111 static libzfs_handle_t *g_zfs;
 112 static uint64_t max_inflight = 1000;
 113 static int leaked_objects = 0;
 114
 115 static void snprintf_blkptr_compact(char *, size_t, const blkptr_t *);
 116 static void mos_obj_refd(uint64_t);
 117
 118 /*
 119  * These libumem hooks provide a reasonable set of defaults for the allocator's
 120  * debugging facilities.
 121  */
 122 const char *
 123 _umem_debug_init()
 124 {
 125         return ("default,verbose"); /* $UMEM_DEBUG setting */
 126 }
 127
 128 const char *
 129 _umem_logging_init(void)
 130 {
 131         return ("fail,contents"); /* $UMEM_LOGGING setting */
 132 }
 133
 134 static void
 135 usage(void)
 136 {
 137         (void) fprintf(stderr,
 138             "Usage:\t%s [-AbcdDFGhikLMPsvX] [-e [-V] [-p <path> ...]] "
 139             "[-I <inflight I/Os>]\n"
 140             "\t\t[-o <var>=<value>]... [-t <txg>] [-U <cache>] [-x <dumpdir>]\n"
 141             "\t\t[<poolname> [<object> ...]]\n"
 142             "\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset> "
 143             "[<object> ...]\n"
 144             "\t%s -C [-A] [-U <cache>]\n"
 145             "\t%s -l [-Aqu] <device>\n"
 146             "\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
 147             "[-U <cache>]\n\t\t<poolname> [<vdev> [<metaslab> ...]]\n"
 148             "\t%s -O <dataset> <path>\n"
 149             "\t%s -R [-A] [-e [-V] [-p <path> ...]] [-U <cache>]\n"
 150             "\t\t<poolname> <vdev>:<offset>:<size>[:<flags>]\n"
 151             "\t%s -E [-A] word0:word1:...:word15\n"
 152             "\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
 153             "<poolname>\n\n",
 154             cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
 155             cmdname, cmdname);
 156
 157         (void) fprintf(stderr, "    Dataset name must include at least one "
 158             "separator character '/' or '@'\n");
 159         (void) fprintf(stderr, "    If dataset name is specified, only that "
 160             "dataset is dumped\n");
 161         (void) fprintf(stderr, "    If object numbers are specified, only "
 162             "those objects are dumped\n\n");
 163         (void) fprintf(stderr, "    Options to control amount of output:\n");
 164         (void) fprintf(stderr, "        -b block statistics\n");
 165         (void) fprintf(stderr, "        -c checksum all metadata (twice for "
 166             "all data) blocks\n");
 167         (void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
 168         (void) fprintf(stderr, "        -d dataset(s)\n");
 169         (void) fprintf(stderr, "        -D dedup statistics\n");
 170         (void) fprintf(stderr, "        -E decode and display block from an "
 171             "embedded block pointer\n");
 172         (void) fprintf(stderr, "        -h pool history\n");
 173         (void) fprintf(stderr, "        -i intent logs\n");
 174         (void) fprintf(stderr, "        -l read label contents\n");
 175         (void) fprintf(stderr, "        -k examine the checkpointed state "
 176             "of the pool\n");
 177         (void) fprintf(stderr, "        -L disable leak tracking (do not "
 178             "load spacemaps)\n");
 179         (void) fprintf(stderr, "        -m metaslabs\n");
 180         (void) fprintf(stderr, "        -M metaslab groups\n");
 181         (void) fprintf(stderr, "        -O perform object lookups by path\n");
 182         (void) fprintf(stderr, "        -R read and display block from a "
 183             "device\n");
 184         (void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
 185         (void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
 186         (void) fprintf(stderr, "        -v verbose (applies to all "
 187             "others)\n\n");
 188         (void) fprintf(stderr, "    Below options are intended for use "
 189             "with other options:\n");
 190         (void) fprintf(stderr, "        -A ignore assertions (-A), enable "
 191             "panic recovery (-AA) or both (-AAA)\n");
 192         (void) fprintf(stderr, "        -e pool is exported/destroyed/"
 193             "has altroot/not in a cachefile\n");
 194         (void) fprintf(stderr, "        -F attempt automatic rewind within "
 195             "safe range of transaction groups\n");
 196         (void) fprintf(stderr, "        -G dump zfs_dbgmsg buffer before "
 197             "exiting\n");
 198         (void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
 199             "specify the maximum number of "
 200             "checksumming I/Os [default is 200]\n");
 201         (void) fprintf(stderr, "        -o <variable>=<value> set global "
 202             "variable to an unsigned 32-bit integer value\n");
 203         (void) fprintf(stderr, "        -p <path> -- use one or more with "
 204             "-e to specify path to vdev dir\n");
 205         (void) fprintf(stderr, "        -P print numbers in parseable form\n");
 206         (void) fprintf(stderr, "        -q don't print label contents\n");
 207         (void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
 208             "searching for uberblocks\n");
 209         (void) fprintf(stderr, "        -u uberblock\n");
 210         (void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
 211             "cachefile\n");
 212         (void) fprintf(stderr, "        -V do verbatim import\n");
 213         (void) fprintf(stderr, "        -x <dumpdir> -- "
 214             "dump all read blocks into specified directory\n");
 215         (void) fprintf(stderr, "        -X attempt extreme rewind (does not "
 216             "work with dataset)\n\n");
 217         (void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
 218             "to make only that option verbose\n");
 219         (void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
 220         exit(1);
 221 }
 222
 223 static void
 224 dump_debug_buffer()
 225 {
 226         if (dump_opt['G']) {
 227                 (void) printf("\n");
 228                 zfs_dbgmsg_print("zdb");
 229         }
 230 }
 231
 232 /*
 233  * Called for usage errors that are discovered after a call to spa_open(),
 234  * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
 235  */
 236
 237 static void
 238 fatal(const char *fmt, ...)
 239 {
 240         va_list ap;
 241
 242         va_start(ap, fmt);
 243         (void) fprintf(stderr, "%s: ", cmdname);
 244         (void) vfprintf(stderr, fmt, ap);
 245         va_end(ap);
 246         (void) fprintf(stderr, "\n");
 247
 248         dump_debug_buffer();
 249
 250         exit(1);
 251 }
 252
 253 /* ARGSUSED */
 254 static void
 255 dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
 256 {
 257         nvlist_t *nv;
 258         size_t nvsize = *(uint64_t *)data;
 259         char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
 260
 261         VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
 262
 263         VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
 264
 265         umem_free(packed, nvsize);
 266
 267         dump_nvlist(nv, 8);
 268
 269         nvlist_free(nv);
 270 }
 271
 272 /* ARGSUSED */
 273 static void
 274 dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
 275 {
 276         spa_history_phys_t *shp = data;
 277
 278         if (shp == NULL)
 279                 return;
 280
 281         (void) printf("\t\tpool_create_len = %llu\n",
 282             (u_longlong_t)shp->sh_pool_create_len);
 283         (void) printf("\t\tphys_max_off = %llu\n",
 284             (u_longlong_t)shp->sh_phys_max_off);
 285         (void) printf("\t\tbof = %llu\n",
 286             (u_longlong_t)shp->sh_bof);
 287         (void) printf("\t\teof = %llu\n",
 288             (u_longlong_t)shp->sh_eof);
 289         (void) printf("\t\trecords_lost = %llu\n",
 290             (u_longlong_t)shp->sh_records_lost);
 291 }
 292
 293 static void
 294 zdb_nicenum(uint64_t num, char *buf, size_t buflen)
 295 {
 296         if (dump_opt['P'])
 297                 (void) snprintf(buf, buflen, "%llu", (longlong_t)num);
 298         else
 299                 nicenum(num, buf, sizeof (buf));
 300 }
 301
 302 static const char histo_stars[] = "****************************************";
 303 static const uint64_t histo_width = sizeof (histo_stars) - 1;
 304
 305 static void
 306 dump_histogram(const uint64_t *histo, int size, int offset)
 307 {
 308         int i;
 309         int minidx = size - 1;
 310         int maxidx = 0;
 311         uint64_t max = 0;
 312
 313         for (i = 0; i < size; i++) {
 314                 if (histo[i] > max)
 315                         max = histo[i];
 316                 if (histo[i] > 0 && i > maxidx)
 317                         maxidx = i;
 318                 if (histo[i] > 0 && i < minidx)
 319                         minidx = i;
 320         }
 321
 322         if (max < histo_width)
 323                 max = histo_width;
 324
 325         for (i = minidx; i <= maxidx; i++) {
 326                 (void) printf("\t\t\t%3u: %6llu %s\n",
 327                     i + offset, (u_longlong_t)histo[i],
 328                     &histo_stars[(max - histo[i]) * histo_width / max]);
 329         }
 330 }
 331
 332 static void
 333 dump_zap_stats(objset_t *os, uint64_t object)
 334 {
 335         int error;
 336         zap_stats_t zs;
 337
 338         error = zap_get_stats(os, object, &zs);
 339         if (error)
 340                 return;
 341
 342         if (zs.zs_ptrtbl_len == 0) {
 343                 ASSERT(zs.zs_num_blocks == 1);
 344                 (void) printf("\tmicrozap: %llu bytes, %llu entries\n",
 345                     (u_longlong_t)zs.zs_blocksize,
 346                     (u_longlong_t)zs.zs_num_entries);
 347                 return;
 348         }
 349
 350         (void) printf("\tFat ZAP stats:\n");
 351
 352         (void) printf("\t\tPointer table:\n");
 353         (void) printf("\t\t\t%llu elements\n",
 354             (u_longlong_t)zs.zs_ptrtbl_len);
 355         (void) printf("\t\t\tzt_blk: %llu\n",
 356             (u_longlong_t)zs.zs_ptrtbl_zt_blk);
 357         (void) printf("\t\t\tzt_numblks: %llu\n",
 358             (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
 359         (void) printf("\t\t\tzt_shift: %llu\n",
 360             (u_longlong_t)zs.zs_ptrtbl_zt_shift);
 361         (void) printf("\t\t\tzt_blks_copied: %llu\n",
 362             (u_longlong_t)zs.zs_ptrtbl_blks_copied);
 363         (void) printf("\t\t\tzt_nextblk: %llu\n",
 364             (u_longlong_t)zs.zs_ptrtbl_nextblk);
 365
 366         (void) printf("\t\tZAP entries: %llu\n",
 367             (u_longlong_t)zs.zs_num_entries);
 368         (void) printf("\t\tLeaf blocks: %llu\n",
 369             (u_longlong_t)zs.zs_num_leafs);
 370         (void) printf("\t\tTotal blocks: %llu\n",
 371             (u_longlong_t)zs.zs_num_blocks);
 372         (void) printf("\t\tzap_block_type: 0x%llx\n",
 373             (u_longlong_t)zs.zs_block_type);
 374         (void) printf("\t\tzap_magic: 0x%llx\n",
 375             (u_longlong_t)zs.zs_magic);
 376         (void) printf("\t\tzap_salt: 0x%llx\n",
 377             (u_longlong_t)zs.zs_salt);
 378
 379         (void) printf("\t\tLeafs with 2^n pointers:\n");
 380         dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
 381
 382         (void) printf("\t\tBlocks with n*5 entries:\n");
 383         dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
 384
 385         (void) printf("\t\tBlocks n/10 full:\n");
 386         dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
 387
 388         (void) printf("\t\tEntries with n chunks:\n");
 389         dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
 390
 391         (void) printf("\t\tBuckets with n entries:\n");
 392         dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
 393 }
 394
 395 /*ARGSUSED*/
 396 static void
 397 dump_none(objset_t *os, uint64_t object, void *data, size_t size)
 398 {
 399 }
 400
 401 /*ARGSUSED*/
 402 static void
 403 dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
 404 {
 405         (void) printf("\tUNKNOWN OBJECT TYPE\n");
 406 }
 407
 408 /*ARGSUSED*/
 409 static void
 410 dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
 411 {
 412 }
 413
 414 /*ARGSUSED*/
 415 static void
 416 dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
 417 {
 418 }
 419
 420 /*ARGSUSED*/
 421 static void
 422 dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
 423 {
 424         zap_cursor_t zc;
 425         zap_attribute_t attr;
 426         void *prop;
 427         unsigned i;
 428
 429         dump_zap_stats(os, object);
 430         (void) printf("\n");
 431
 432         for (zap_cursor_init(&zc, os, object);
 433             zap_cursor_retrieve(&zc, &attr) == 0;
 434             zap_cursor_advance(&zc)) {
 435                 (void) printf("\t\t%s = ", attr.za_name);
 436                 if (attr.za_num_integers == 0) {
 437                         (void) printf("\n");
 438                         continue;
 439                 }
 440                 prop = umem_zalloc(attr.za_num_integers *
 441                     attr.za_integer_length, UMEM_NOFAIL);
 442                 (void) zap_lookup(os, object, attr.za_name,
 443                     attr.za_integer_length, attr.za_num_integers, prop);
 444                 if (attr.za_integer_length == 1) {
 445                         (void) printf("%s", (char *)prop);
 446                 } else {
 447                         for (i = 0; i < attr.za_num_integers; i++) {
 448                                 switch (attr.za_integer_length) {
 449                                 case 2:
 450                                         (void) printf("%u ",
 451                                             ((uint16_t *)prop)[i]);
 452                                         break;
 453                                 case 4:
 454                                         (void) printf("%u ",
 455                                             ((uint32_t *)prop)[i]);
 456                                         break;
 457                                 case 8:
 458                                         (void) printf("%lld ",
 459                                             (u_longlong_t)((int64_t *)prop)[i]);
 460                                         break;
 461                                 }
 462                         }
 463                 }
 464                 (void) printf("\n");
 465                 umem_free(prop, attr.za_num_integers * attr.za_integer_length);
 466         }
 467         zap_cursor_fini(&zc);
 468 }
 469
 470 static void
 471 dump_bpobj(objset_t *os, uint64_t object, void *data, size_t size)
 472 {
 473         bpobj_phys_t *bpop = data;
 474         char bytes[32], comp[32], uncomp[32];
 475
 476         /* make sure the output won't get truncated */
 477         CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
 478         CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
 479         CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
 480
 481         if (bpop == NULL)
 482                 return;
 483
 484         zdb_nicenum(bpop->bpo_bytes, bytes, sizeof (bytes));
 485         zdb_nicenum(bpop->bpo_comp, comp, sizeof (comp));
 486         zdb_nicenum(bpop->bpo_uncomp, uncomp, sizeof (uncomp));
 487
 488         (void) printf("\t\tnum_blkptrs = %llu\n",
 489             (u_longlong_t)bpop->bpo_num_blkptrs);
 490         (void) printf("\t\tbytes = %s\n", bytes);
 491         if (size >= BPOBJ_SIZE_V1) {
 492                 (void) printf("\t\tcomp = %s\n", comp);
 493                 (void) printf("\t\tuncomp = %s\n", uncomp);
 494         }
 495         if (size >= sizeof (*bpop)) {
 496                 (void) printf("\t\tsubobjs = %llu\n",
 497                     (u_longlong_t)bpop->bpo_subobjs);
 498                 (void) printf("\t\tnum_subobjs = %llu\n",
 499                     (u_longlong_t)bpop->bpo_num_subobjs);
 500         }
 501
 502         if (dump_opt['d'] < 5)
 503                 return;
 504
 505         for (uint64_t i = 0; i < bpop->bpo_num_blkptrs; i++) {
 506                 char blkbuf[BP_SPRINTF_LEN];
 507                 blkptr_t bp;
 508
 509                 int err = dmu_read(os, object,
 510                     i * sizeof (bp), sizeof (bp), &bp, 0);
 511                 if (err != 0) {
 512                         (void) printf("got error %u from dmu_read\n", err);
 513                         break;
 514                 }
 515                 snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), &bp);
 516                 (void) printf("\t%s\n", blkbuf);
 517         }
 518 }
 519
 520 /* ARGSUSED */
 521 static void
 522 dump_bpobj_subobjs(objset_t *os, uint64_t object, void *data, size_t size)
 523 {
 524         dmu_object_info_t doi;
 525
 526         VERIFY0(dmu_object_info(os, object, &doi));
 527         uint64_t *subobjs = kmem_alloc(doi.doi_max_offset, KM_SLEEP);
 528
 529         int err = dmu_read(os, object, 0, doi.doi_max_offset, subobjs, 0);
 530         if (err != 0) {
 531                 (void) printf("got error %u from dmu_read\n", err);
 532                 kmem_free(subobjs, doi.doi_max_offset);
 533                 return;
 534         }
 535
 536         int64_t last_nonzero = -1;
 537         for (uint64_t i = 0; i < doi.doi_max_offset / 8; i++) {
 538                 if (subobjs[i] != 0)
 539                         last_nonzero = i;
 540         }
 541
 542         for (int64_t i = 0; i <= last_nonzero; i++) {
 543                 (void) printf("\t%llu\n", (longlong_t)subobjs[i]);
 544         }
 545         kmem_free(subobjs, doi.doi_max_offset);
 546 }
 547
 548 /*ARGSUSED*/
 549 static void
 550 dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
 551 {
 552         dump_zap_stats(os, object);
 553         /* contents are printed elsewhere, properly decoded */
 554 }
 555
 556 /*ARGSUSED*/
 557 static void
 558 dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
 559 {
 560         zap_cursor_t zc;
 561         zap_attribute_t attr;
 562
 563         dump_zap_stats(os, object);
 564         (void) printf("\n");
 565
 566         for (zap_cursor_init(&zc, os, object);
 567             zap_cursor_retrieve(&zc, &attr) == 0;
 568             zap_cursor_advance(&zc)) {
 569                 (void) printf("\t\t%s = ", attr.za_name);
 570                 if (attr.za_num_integers == 0) {
 571                         (void) printf("\n");
 572                         continue;
 573                 }
 574                 (void) printf(" %llx : [%d:%d:%d]\n",
 575                     (u_longlong_t)attr.za_first_integer,
 576                     (int)ATTR_LENGTH(attr.za_first_integer),
 577                     (int)ATTR_BSWAP(attr.za_first_integer),
 578                     (int)ATTR_NUM(attr.za_first_integer));
 579         }
 580         zap_cursor_fini(&zc);
 581 }
 582
 583 /*ARGSUSED*/
 584 static void
 585 dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
 586 {
 587         zap_cursor_t zc;
 588         zap_attribute_t attr;
 589         uint16_t *layout_attrs;
 590         unsigned i;
 591
 592         dump_zap_stats(os, object);
 593         (void) printf("\n");
 594
 595         for (zap_cursor_init(&zc, os, object);
 596             zap_cursor_retrieve(&zc, &attr) == 0;
 597             zap_cursor_advance(&zc)) {
 598                 (void) printf("\t\t%s = [", attr.za_name);
 599                 if (attr.za_num_integers == 0) {
 600                         (void) printf("\n");
 601                         continue;
 602                 }
 603
 604                 VERIFY(attr.za_integer_length == 2);
 605                 layout_attrs = umem_zalloc(attr.za_num_integers *
 606                     attr.za_integer_length, UMEM_NOFAIL);
 607
 608                 VERIFY(zap_lookup(os, object, attr.za_name,
 609                     attr.za_integer_length,
 610                     attr.za_num_integers, layout_attrs) == 0);
 611
 612                 for (i = 0; i != attr.za_num_integers; i++)
 613                         (void) printf(" %d ", (int)layout_attrs[i]);
 614                 (void) printf("]\n");
 615                 umem_free(layout_attrs,
 616                     attr.za_num_integers * attr.za_integer_length);
 617         }
 618         zap_cursor_fini(&zc);
 619 }
 620
 621 /*ARGSUSED*/
 622 static void
 623 dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
 624 {
 625         zap_cursor_t zc;
 626         zap_attribute_t attr;
 627         const char *typenames[] = {
 628                 /* 0 */ "not specified",
 629                 /* 1 */ "FIFO",
 630                 /* 2 */ "Character Device",
 631                 /* 3 */ "3 (invalid)",
 632                 /* 4 */ "Directory",
 633                 /* 5 */ "5 (invalid)",
 634                 /* 6 */ "Block Device",
 635                 /* 7 */ "7 (invalid)",
 636                 /* 8 */ "Regular File",
 637                 /* 9 */ "9 (invalid)",
 638                 /* 10 */ "Symbolic Link",
 639                 /* 11 */ "11 (invalid)",
 640                 /* 12 */ "Socket",
 641                 /* 13 */ "Door",
 642                 /* 14 */ "Event Port",
 643                 /* 15 */ "15 (invalid)",
 644         };
 645
 646         dump_zap_stats(os, object);
 647         (void) printf("\n");
 648
 649         for (zap_cursor_init(&zc, os, object);
 650             zap_cursor_retrieve(&zc, &attr) == 0;
 651             zap_cursor_advance(&zc)) {
 652                 (void) printf("\t\t%s = %lld (type: %s)\n",
 653                     attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
 654                     typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
 655         }
 656         zap_cursor_fini(&zc);
 657 }
 658
 659 static int
 660 get_dtl_refcount(vdev_t *vd)
 661 {
 662         int refcount = 0;
 663
 664         if (vd->vdev_ops->vdev_op_leaf) {
 665                 space_map_t *sm = vd->vdev_dtl_sm;
 666
 667                 if (sm != NULL &&
 668                     sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
 669                         return (1);
 670                 return (0);
 671         }
 672
 673         for (unsigned c = 0; c < vd->vdev_children; c++)
 674                 refcount += get_dtl_refcount(vd->vdev_child[c]);
 675         return (refcount);
 676 }
 677
 678 static int
 679 get_metaslab_refcount(vdev_t *vd)
 680 {
 681         int refcount = 0;
 682
 683         if (vd->vdev_top == vd) {
 684                 for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
 685                         space_map_t *sm = vd->vdev_ms[m]->ms_sm;
 686
 687                         if (sm != NULL &&
 688                             sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
 689                                 refcount++;
 690                 }
 691         }
 692         for (unsigned c = 0; c < vd->vdev_children; c++)
 693                 refcount += get_metaslab_refcount(vd->vdev_child[c]);
 694
 695         return (refcount);
 696 }
 697
 698 static int
 699 get_obsolete_refcount(vdev_t *vd)
 700 {
 701         int refcount = 0;
 702
 703         uint64_t obsolete_sm_obj = vdev_obsolete_sm_object(vd);
 704         if (vd->vdev_top == vd && obsolete_sm_obj != 0) {
 705                 dmu_object_info_t doi;
 706                 VERIFY0(dmu_object_info(vd->vdev_spa->spa_meta_objset,
 707                     obsolete_sm_obj, &doi));
 708                 if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
 709                         refcount++;
 710                 }
 711         } else {
 712                 ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
 713                 ASSERT3U(obsolete_sm_obj, ==, 0);
 714         }
 715         for (unsigned c = 0; c < vd->vdev_children; c++) {
 716                 refcount += get_obsolete_refcount(vd->vdev_child[c]);
 717         }
 718
 719         return (refcount);
 720 }
 721
 722 static int
 723 get_prev_obsolete_spacemap_refcount(spa_t *spa)
 724 {
 725         uint64_t prev_obj =
 726             spa->spa_condensing_indirect_phys.scip_prev_obsolete_sm_object;
 727         if (prev_obj != 0) {
 728                 dmu_object_info_t doi;
 729                 VERIFY0(dmu_object_info(spa->spa_meta_objset, prev_obj, &doi));
 730                 if (doi.doi_bonus_size == sizeof (space_map_phys_t)) {
 731                         return (1);
 732                 }
 733         }
 734         return (0);
 735 }
 736
 737 static int
 738 get_checkpoint_refcount(vdev_t *vd)
 739 {
 740         int refcount = 0;
 741
 742         if (vd->vdev_top == vd && vd->vdev_top_zap != 0 &&
 743             zap_contains(spa_meta_objset(vd->vdev_spa),
 744             vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) == 0)
 745                 refcount++;
 746
 747         for (uint64_t c = 0; c < vd->vdev_children; c++)
 748                 refcount += get_checkpoint_refcount(vd->vdev_child[c]);
 749
 750         return (refcount);
 751 }
 752
 753 static int
 754 verify_spacemap_refcounts(spa_t *spa)
 755 {
 756         uint64_t expected_refcount = 0;
 757         uint64_t actual_refcount;
 758
 759         (void) feature_get_refcount(spa,
 760             &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
 761             &expected_refcount);
 762         actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
 763         actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
 764         actual_refcount += get_obsolete_refcount(spa->spa_root_vdev);
 765         actual_refcount += get_prev_obsolete_spacemap_refcount(spa);
 766         actual_refcount += get_checkpoint_refcount(spa->spa_root_vdev);
 767
 768         if (expected_refcount != actual_refcount) {
 769                 (void) printf("space map refcount mismatch: expected %lld != "
 770                     "actual %lld\n",
 771                     (longlong_t)expected_refcount,
 772                     (longlong_t)actual_refcount);
 773                 return (2);
 774         }
 775         return (0);
 776 }
 777
 778 static void
 779 dump_spacemap(objset_t *os, space_map_t *sm)
 780 {
 781         char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
 782             "INVALID", "INVALID", "INVALID", "INVALID" };
 783
 784         if (sm == NULL)
 785                 return;
 786
 787         (void) printf("space map object %llu:\n",
 788             (longlong_t)sm->sm_object);
 789         (void) printf("  smp_length = 0x%llx\n",
 790             (longlong_t)sm->sm_phys->smp_length);
 791         (void) printf("  smp_alloc = 0x%llx\n",
 792             (longlong_t)sm->sm_phys->smp_alloc);
 793
 794         if (dump_opt['d'] < 6 && dump_opt['m'] < 4)
 795                 return;
 796
 797         /*
 798          * Print out the freelist entries in both encoded and decoded form.
 799          */
 800         uint8_t mapshift = sm->sm_shift;
 801         int64_t alloc = 0;
 802         uint64_t word, entry_id = 0;
 803         for (uint64_t offset = 0; offset < space_map_length(sm);
 804             offset += sizeof (word)) {
 805
 806                 VERIFY0(dmu_read(os, space_map_object(sm), offset,
 807                     sizeof (word), &word, DMU_READ_PREFETCH));
 808
 809                 if (sm_entry_is_debug(word)) {
 810                         (void) printf("\t    [%6llu] %s: txg %llu pass %llu\n",
 811                             (u_longlong_t)entry_id,
 812                             ddata[SM_DEBUG_ACTION_DECODE(word)],
 813                             (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
 814                             (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
 815                         entry_id++;
 816                         continue;
 817                 }
 818
 819                 uint8_t words;
 820                 char entry_type;
 821                 uint64_t entry_off, entry_run, entry_vdev = SM_NO_VDEVID;
 822
 823                 if (sm_entry_is_single_word(word)) {
 824                         entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
 825                             'A' : 'F';
 826                         entry_off = (SM_OFFSET_DECODE(word) << mapshift) +
 827                             sm->sm_start;
 828                         entry_run = SM_RUN_DECODE(word) << mapshift;
 829                         words = 1;
 830                 } else {
 831                         /* it is a two-word entry so we read another word */
 832                         ASSERT(sm_entry_is_double_word(word));
 833
 834                         uint64_t extra_word;
 835                         offset += sizeof (extra_word);
 836                         VERIFY0(dmu_read(os, space_map_object(sm), offset,
 837                             sizeof (extra_word), &extra_word,
 838                             DMU_READ_PREFETCH));
 839
 840                         ASSERT3U(offset, <=, space_map_length(sm));
 841
 842                         entry_run = SM2_RUN_DECODE(word) << mapshift;
 843                         entry_vdev = SM2_VDEV_DECODE(word);
 844                         entry_type = (SM2_TYPE_DECODE(extra_word) == SM_ALLOC) ?
 845                             'A' : 'F';
 846                         entry_off = (SM2_OFFSET_DECODE(extra_word) <<
 847                             mapshift) + sm->sm_start;
 848                         words = 2;
 849                 }
 850
 851                 (void) printf("\t    [%6llu]    %c  range:"
 852                     " %010llx-%010llx  size: %06llx vdev: %06llu words: %u\n",
 853                     (u_longlong_t)entry_id,
 854                     entry_type, (u_longlong_t)entry_off,
 855                     (u_longlong_t)(entry_off + entry_run),
 856                     (u_longlong_t)entry_run,
 857                     (u_longlong_t)entry_vdev, words);
 858
 859                 if (entry_type == 'A')
 860                         alloc += entry_run;
 861                 else
 862                         alloc -= entry_run;
 863                 entry_id++;
 864         }
 865         if (alloc != space_map_allocated(sm)) {
 866                 (void) printf("space_map_object alloc (%lld) INCONSISTENT "
 867                     "with space map summary (%lld)\n",
 868                     (longlong_t)space_map_allocated(sm), (longlong_t)alloc);
 869         }
 870 }
 871
 872 static void
 873 dump_metaslab_stats(metaslab_t *msp)
 874 {
 875         char maxbuf[32];
 876         range_tree_t *rt = msp->ms_allocatable;
 877         avl_tree_t *t = &msp->ms_allocatable_by_size;
 878         int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
 879
 880         /* max sure nicenum has enough space */
 881         CTASSERT(sizeof (maxbuf) >= NN_NUMBUF_SZ);
 882
 883         zdb_nicenum(metaslab_block_maxsize(msp), maxbuf, sizeof (maxbuf));
 884
 885         (void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
 886             "segments", avl_numnodes(t), "maxsize", maxbuf,
 887             "freepct", free_pct);
 888         (void) printf("\tIn-memory histogram:\n");
 889         dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
 890 }
 891
 892 static void
 893 dump_metaslab(metaslab_t *msp)
 894 {
 895         vdev_t *vd = msp->ms_group->mg_vd;
 896         spa_t *spa = vd->vdev_spa;
 897         space_map_t *sm = msp->ms_sm;
 898         char freebuf[32];
 899
 900         zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf,
 901             sizeof (freebuf));
 902
 903         (void) printf(
 904             "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
 905             (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
 906             (u_longlong_t)space_map_object(sm), freebuf);
 907
 908         if (dump_opt['m'] > 2 && !dump_opt['L']) {
 909                 mutex_enter(&msp->ms_lock);
 910                 VERIFY0(metaslab_load(msp));
 911                 range_tree_stat_verify(msp->ms_allocatable);
 912                 dump_metaslab_stats(msp);
 913                 metaslab_unload(msp);
 914                 mutex_exit(&msp->ms_lock);
 915         }
 916
 917         if (dump_opt['m'] > 1 && sm != NULL &&
 918             spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
 919                 /*
 920                  * The space map histogram represents free space in chunks
 921                  * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
 922                  */
 923                 (void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
 924                     (u_longlong_t)msp->ms_fragmentation);
 925                 dump_histogram(sm->sm_phys->smp_histogram,
 926                     SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
 927         }
 928
 929         ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
 930         dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
 931 }
 932
 933 static void
 934 print_vdev_metaslab_header(vdev_t *vd)
 935 {
 936         vdev_alloc_bias_t alloc_bias = vd->vdev_alloc_bias;
 937         const char *bias_str;
 938
 939         bias_str = (alloc_bias == VDEV_BIAS_LOG || vd->vdev_islog) ?
 940             VDEV_ALLOC_BIAS_LOG :
 941             (alloc_bias == VDEV_BIAS_SPECIAL) ? VDEV_ALLOC_BIAS_SPECIAL :
 942             (alloc_bias == VDEV_BIAS_DEDUP) ? VDEV_ALLOC_BIAS_DEDUP :
 943             vd->vdev_islog ? "log" : "";
 944
 945         (void) printf("\tvdev %10llu   %s\n"
 946             "\t%-10s%5llu   %-19s   %-15s   %-12s\n",
 947             (u_longlong_t)vd->vdev_id, bias_str,
 948             "metaslabs", (u_longlong_t)vd->vdev_ms_count,
 949             "offset", "spacemap", "free");
 950         (void) printf("\t%15s   %19s   %15s   %12s\n",
 951             "---------------", "-------------------",
 952             "---------------", "------------");
 953 }
 954
 955 static void
 956 dump_metaslab_groups(spa_t *spa)
 957 {
 958         vdev_t *rvd = spa->spa_root_vdev;
 959         metaslab_class_t *mc = spa_normal_class(spa);
 960         uint64_t fragmentation;
 961
 962         metaslab_class_histogram_verify(mc);
 963
 964         for (unsigned c = 0; c < rvd->vdev_children; c++) {
 965                 vdev_t *tvd = rvd->vdev_child[c];
 966                 metaslab_group_t *mg = tvd->vdev_mg;
 967
 968                 if (mg == NULL || mg->mg_class != mc)
 969                         continue;
 970
 971                 metaslab_group_histogram_verify(mg);
 972                 mg->mg_fragmentation = metaslab_group_fragmentation(mg);
 973
 974                 (void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
 975                     "fragmentation",
 976                     (u_longlong_t)tvd->vdev_id,
 977                     (u_longlong_t)tvd->vdev_ms_count);
 978                 if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
 979                         (void) printf("%3s\n", "-");
 980                 } else {
 981                         (void) printf("%3llu%%\n",
 982                             (u_longlong_t)mg->mg_fragmentation);
 983                 }
 984                 dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
 985         }
 986
 987         (void) printf("\tpool %s\tfragmentation", spa_name(spa));
 988         fragmentation = metaslab_class_fragmentation(mc);
 989         if (fragmentation == ZFS_FRAG_INVALID)
 990                 (void) printf("\t%3s\n", "-");
 991         else
 992                 (void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
 993         dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
 994 }
 995
 996 static void
 997 print_vdev_indirect(vdev_t *vd)
 998 {
 999         vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
1000         vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
1001         vdev_indirect_births_t *vib = vd->vdev_indirect_births;
1002
1003         if (vim == NULL) {
1004                 ASSERT3P(vib, ==, NULL);
1005                 return;
1006         }
1007
1008         ASSERT3U(vdev_indirect_mapping_object(vim), ==,
1009             vic->vic_mapping_object);
1010         ASSERT3U(vdev_indirect_births_object(vib), ==,
1011             vic->vic_births_object);
1012
1013         (void) printf("indirect births obj %llu:\n",
1014             (longlong_t)vic->vic_births_object);
1015         (void) printf("    vib_count = %llu\n",
1016             (longlong_t)vdev_indirect_births_count(vib));
1017         for (uint64_t i = 0; i < vdev_indirect_births_count(vib); i++) {
1018                 vdev_indirect_birth_entry_phys_t *cur_vibe =
1019                     &vib->vib_entries[i];
1020                 (void) printf("\toffset %llx -> txg %llu\n",
1021                     (longlong_t)cur_vibe->vibe_offset,
1022                     (longlong_t)cur_vibe->vibe_phys_birth_txg);
1023         }
1024         (void) printf("\n");
1025
1026         (void) printf("indirect mapping obj %llu:\n",
1027             (longlong_t)vic->vic_mapping_object);
1028         (void) printf("    vim_max_offset = 0x%llx\n",
1029             (longlong_t)vdev_indirect_mapping_max_offset(vim));
1030         (void) printf("    vim_bytes_mapped = 0x%llx\n",
1031             (longlong_t)vdev_indirect_mapping_bytes_mapped(vim));
1032         (void) printf("    vim_count = %llu\n",
1033             (longlong_t)vdev_indirect_mapping_num_entries(vim));
1034
1035         if (dump_opt['d'] <= 5 && dump_opt['m'] <= 3)
1036                 return;
1037
1038         uint32_t *counts = vdev_indirect_mapping_load_obsolete_counts(vim);
1039
1040         for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
1041                 vdev_indirect_mapping_entry_phys_t *vimep =
1042                     &vim->vim_entries[i];
1043                 (void) printf("\t<%llx:%llx:%llx> -> "
1044                     "<%llx:%llx:%llx> (%x obsolete)\n",
1045                     (longlong_t)vd->vdev_id,
1046                     (longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
1047                     (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1048                     (longlong_t)DVA_GET_VDEV(&vimep->vimep_dst),
1049                     (longlong_t)DVA_GET_OFFSET(&vimep->vimep_dst),
1050                     (longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
1051                     counts[i]);
1052         }
1053         (void) printf("\n");
1054
1055         uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd);
1056         if (obsolete_sm_object != 0) {
1057                 objset_t *mos = vd->vdev_spa->spa_meta_objset;
1058                 (void) printf("obsolete space map object %llu:\n",
1059                     (u_longlong_t)obsolete_sm_object);
1060                 ASSERT(vd->vdev_obsolete_sm != NULL);
1061                 ASSERT3U(space_map_object(vd->vdev_obsolete_sm), ==,
1062                     obsolete_sm_object);
1063                 dump_spacemap(mos, vd->vdev_obsolete_sm);
1064                 (void) printf("\n");
1065         }
1066 }
1067
1068 static void
1069 dump_metaslabs(spa_t *spa)
1070 {
1071         vdev_t *vd, *rvd = spa->spa_root_vdev;
1072         uint64_t m, c = 0, children = rvd->vdev_children;
1073
1074         (void) printf("\nMetaslabs:\n");
1075
1076         if (!dump_opt['d'] && zopt_objects > 0) {
1077                 c = zopt_object[0];
1078
1079                 if (c >= children)
1080                         (void) fatal("bad vdev id: %llu", (u_longlong_t)c);
1081
1082                 if (zopt_objects > 1) {
1083                         vd = rvd->vdev_child[c];
1084                         print_vdev_metaslab_header(vd);
1085
1086                         for (m = 1; m < zopt_objects; m++) {
1087                                 if (zopt_object[m] < vd->vdev_ms_count)
1088                                         dump_metaslab(
1089                                             vd->vdev_ms[zopt_object[m]]);
1090                                 else
1091                                         (void) fprintf(stderr, "bad metaslab "
1092                                             "number %llu\n",
1093                                             (u_longlong_t)zopt_object[m]);
1094                         }
1095                         (void) printf("\n");
1096                         return;
1097                 }
1098                 children = c + 1;
1099         }
1100         for (; c < children; c++) {
1101                 vd = rvd->vdev_child[c];
1102                 print_vdev_metaslab_header(vd);
1103
1104                 print_vdev_indirect(vd);
1105
1106                 for (m = 0; m < vd->vdev_ms_count; m++)
1107                         dump_metaslab(vd->vdev_ms[m]);
1108                 (void) printf("\n");
1109         }
1110 }
1111
1112 static void
1113 dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
1114 {
1115         const ddt_phys_t *ddp = dde->dde_phys;
1116         const ddt_key_t *ddk = &dde->dde_key;
1117         const char *types[4] = { "ditto", "single", "double", "triple" };
1118         char blkbuf[BP_SPRINTF_LEN];
1119         blkptr_t blk;
1120
1121         for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
1122                 if (ddp->ddp_phys_birth == 0)
1123                         continue;
1124                 ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
1125                 snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
1126                 (void) printf("index %llx refcnt %llu %s %s\n",
1127                     (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
1128                     types[p], blkbuf);
1129         }
1130 }
1131
1132 static void
1133 dump_dedup_ratio(const ddt_stat_t *dds)
1134 {
1135         double rL, rP, rD, D, dedup, compress, copies;
1136
1137         if (dds->dds_blocks == 0)
1138                 return;
1139
1140         rL = (double)dds->dds_ref_lsize;
1141         rP = (double)dds->dds_ref_psize;
1142         rD = (double)dds->dds_ref_dsize;
1143         D = (double)dds->dds_dsize;
1144
1145         dedup = rD / D;
1146         compress = rL / rP;
1147         copies = rD / rP;
1148
1149         (void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
1150             "dedup * compress / copies = %.2f\n\n",
1151             dedup, compress, copies, dedup * compress / copies);
1152 }
1153
1154 static void
1155 dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
1156 {
1157         char name[DDT_NAMELEN];
1158         ddt_entry_t dde;
1159         uint64_t walk = 0;
1160         dmu_object_info_t doi;
1161         uint64_t count, dspace, mspace;
1162         int error;
1163
1164         error = ddt_object_info(ddt, type, class, &doi);
1165
1166         if (error == ENOENT)
1167                 return;
1168         ASSERT(error == 0);
1169
1170         error = ddt_object_count(ddt, type, class, &count);
1171         ASSERT(error == 0);
1172         if (count == 0)
1173                 return;
1174
1175         dspace = doi.doi_physical_blocks_512 << 9;
1176         mspace = doi.doi_fill_count * doi.doi_data_block_size;
1177
1178         ddt_object_name(ddt, type, class, name);
1179
1180         (void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
1181             name,
1182             (u_longlong_t)count,
1183             (u_longlong_t)(dspace / count),
1184             (u_longlong_t)(mspace / count));
1185
1186         if (dump_opt['D'] < 3)
1187                 return;
1188
1189         zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
1190
1191         if (dump_opt['D'] < 4)
1192                 return;
1193
1194         if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
1195                 return;
1196
1197         (void) printf("%s contents:\n\n", name);
1198
1199         while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
1200                 dump_dde(ddt, &dde, walk);
1201
1202         ASSERT3U(error, ==, ENOENT);
1203
1204         (void) printf("\n");
1205 }
1206
1207 static void
1208 dump_all_ddts(spa_t *spa)
1209 {
1210         ddt_histogram_t ddh_total;
1211         ddt_stat_t dds_total;
1212
1213         bzero(&ddh_total, sizeof (ddh_total));
1214         bzero(&dds_total, sizeof (dds_total));
1215
1216         for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
1217                 ddt_t *ddt = spa->spa_ddt[c];
1218                 for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
1219                         for (enum ddt_class class = 0; class < DDT_CLASSES;
1220                             class++) {
1221                                 dump_ddt(ddt, type, class);
1222                         }
1223                 }
1224         }
1225
1226         ddt_get_dedup_stats(spa, &dds_total);
1227
1228         if (dds_total.dds_blocks == 0) {
1229                 (void) printf("All DDTs are empty\n");
1230                 return;
1231         }
1232
1233         (void) printf("\n");
1234
1235         if (dump_opt['D'] > 1) {
1236                 (void) printf("DDT histogram (aggregated over all DDTs):\n");
1237                 ddt_get_dedup_histogram(spa, &ddh_total);
1238                 zpool_dump_ddt(&dds_total, &ddh_total);
1239         }
1240
1241         dump_dedup_ratio(&dds_total);
1242 }
1243
1244 static void
1245 dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
1246 {
1247         char *prefix = arg;
1248
1249         (void) printf("%s [%llu,%llu) length %llu\n",
1250             prefix,
1251             (u_longlong_t)start,
1252             (u_longlong_t)(start + size),
1253             (u_longlong_t)(size));
1254 }
1255
1256 static void
1257 dump_dtl(vdev_t *vd, int indent)
1258 {
1259         spa_t *spa = vd->vdev_spa;
1260         boolean_t required;
1261         const char *name[DTL_TYPES] = { "missing", "partial", "scrub",
1262                 "outage" };
1263         char prefix[256];
1264
1265         spa_vdev_state_enter(spa, SCL_NONE);
1266         required = vdev_dtl_required(vd);
1267         (void) spa_vdev_state_exit(spa, NULL, 0);
1268
1269         if (indent == 0)
1270                 (void) printf("\nDirty time logs:\n\n");
1271
1272         (void) printf("\t%*s%s [%s]\n", indent, "",
1273             vd->vdev_path ? vd->vdev_path :
1274             vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
1275             required ? "DTL-required" : "DTL-expendable");
1276
1277         for (int t = 0; t < DTL_TYPES; t++) {
1278                 range_tree_t *rt = vd->vdev_dtl[t];
1279                 if (range_tree_space(rt) == 0)
1280                         continue;
1281                 (void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
1282                     indent + 2, "", name[t]);
1283                 range_tree_walk(rt, dump_dtl_seg, prefix);
1284                 if (dump_opt['d'] > 5 && vd->vdev_children == 0)
1285                         dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
1286         }
1287
1288         for (unsigned c = 0; c < vd->vdev_children; c++)
1289                 dump_dtl(vd->vdev_child[c], indent + 4);
1290 }
1291
1292 /* from spa_history.c: spa_history_create_obj() */
1293 #define HIS_BUF_LEN_DEF (128 << 10)
1294 #define HIS_BUF_LEN_MAX (1 << 30)
1295
1296 static void
1297 dump_history(spa_t *spa)
1298 {
1299         nvlist_t **events = NULL;
1300         char *buf = NULL;
1301         uint64_t bufsize = HIS_BUF_LEN_DEF;
1302         uint64_t resid, len, off = 0;
1303         uint_t num = 0;
1304         int error;
1305         time_t tsec;
1306         struct tm t;
1307         char tbuf[30];
1308         char internalstr[MAXPATHLEN];
1309
1310         if ((buf = malloc(bufsize)) == NULL)
1311                 (void) fprintf(stderr, "Unable to read history: "
1312                     "out of memory\n");
1313         do {
1314                 len = bufsize;
1315
1316                 if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1317                         (void) fprintf(stderr, "Unable to read history: "
1318                             "error %d\n", error);
1319                         return;
1320                 }
1321
1322                 if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1323                         break;
1324                 off -= resid;
1325
1326                 /*
1327                  * If the history block is too big, double the buffer
1328                  * size and try again.
1329                  */
1330                 if (resid == len) {
1331                         free(buf);
1332                         buf = NULL;
1333
1334                         bufsize <<= 1;
1335                         if ((bufsize >= HIS_BUF_LEN_MAX) ||
1336                             ((buf = malloc(bufsize)) == NULL)) {
1337                                 (void) fprintf(stderr, "Unable to read history: "
1338                                     "out of memory\n");
1339                                 return;
1340                         }
1341                 }
1342         } while (len != 0);
1343         free(buf);
1344
1345         (void) printf("\nHistory:\n");
1346         for (unsigned i = 0; i < num; i++) {
1347                 uint64_t time, txg, ievent;
1348                 char *cmd, *intstr;
1349                 boolean_t printed = B_FALSE;
1350
1351                 if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1352                     &time) != 0)
1353                         goto next;
1354                 if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1355                     &cmd) != 0) {
1356                         if (nvlist_lookup_uint64(events[i],
1357                             ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1358                                 goto next;
1359                         verify(nvlist_lookup_uint64(events[i],
1360                             ZPOOL_HIST_TXG, &txg) == 0);
1361                         verify(nvlist_lookup_string(events[i],
1362                             ZPOOL_HIST_INT_STR, &intstr) == 0);
1363                         if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1364                                 goto next;
1365
1366                         (void) snprintf(internalstr,
1367                             sizeof (internalstr),
1368                             "[internal %s txg:%ju] %s",
1369                             zfs_history_event_names[ievent], (uintmax_t)txg,
1370                             intstr);
1371                         cmd = internalstr;
1372                 }
1373                 tsec = time;
1374                 (void) localtime_r(&tsec, &t);
1375                 (void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1376                 (void) printf("%s %s\n", tbuf, cmd);
1377                 printed = B_TRUE;
1378
1379 next:
1380                 if (dump_opt['h'] > 1) {
1381                         if (!printed)
1382                                 (void) printf("unrecognized record:\n");
1383                         dump_nvlist(events[i], 2);
1384                 }
1385         }
1386 }
1387
1388 /*ARGSUSED*/
1389 static void
1390 dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1391 {
1392 }
1393
1394 static uint64_t
1395 blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1396     const zbookmark_phys_t *zb)
1397 {
1398         if (dnp == NULL) {
1399                 ASSERT(zb->zb_level < 0);
1400                 if (zb->zb_object == 0)
1401                         return (zb->zb_blkid);
1402                 return (zb->zb_blkid * BP_GET_LSIZE(bp));
1403         }
1404
1405         ASSERT(zb->zb_level >= 0);
1406
1407         return ((zb->zb_blkid <<
1408             (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1409             dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1410 }
1411
1412 static void
1413 snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1414 {
1415         const dva_t *dva = bp->blk_dva;
1416         int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1417
1418         if (dump_opt['b'] >= 6) {
1419                 snprintf_blkptr(blkbuf, buflen, bp);
1420                 return;
1421         }
1422
1423         if (BP_IS_EMBEDDED(bp)) {
1424                 (void) sprintf(blkbuf,
1425                     "EMBEDDED et=%u %llxL/%llxP B=%llu",
1426                     (int)BPE_GET_ETYPE(bp),
1427                     (u_longlong_t)BPE_GET_LSIZE(bp),
1428                     (u_longlong_t)BPE_GET_PSIZE(bp),
1429                     (u_longlong_t)bp->blk_birth);
1430                 return;
1431         }
1432
1433         blkbuf[0] = '\0';
1434         for (int i = 0; i < ndvas; i++)
1435                 (void) snprintf(blkbuf + strlen(blkbuf),
1436                     buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1437                     (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1438                     (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1439                     (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1440
1441         if (BP_IS_HOLE(bp)) {
1442                 (void) snprintf(blkbuf + strlen(blkbuf),
1443                     buflen - strlen(blkbuf),
1444                     "%llxL B=%llu",
1445                     (u_longlong_t)BP_GET_LSIZE(bp),
1446                     (u_longlong_t)bp->blk_birth);
1447         } else {
1448                 (void) snprintf(blkbuf + strlen(blkbuf),
1449                     buflen - strlen(blkbuf),
1450                     "%llxL/%llxP F=%llu B=%llu/%llu",
1451                     (u_longlong_t)BP_GET_LSIZE(bp),
1452                     (u_longlong_t)BP_GET_PSIZE(bp),
1453                     (u_longlong_t)BP_GET_FILL(bp),
1454                     (u_longlong_t)bp->blk_birth,
1455                     (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1456         }
1457 }
1458
1459 static void
1460 print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1461     const dnode_phys_t *dnp)
1462 {
1463         char blkbuf[BP_SPRINTF_LEN];
1464         int l;
1465
1466         if (!BP_IS_EMBEDDED(bp)) {
1467                 ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1468                 ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1469         }
1470
1471         (void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1472
1473         ASSERT(zb->zb_level >= 0);
1474
1475         for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1476                 if (l == zb->zb_level) {
1477                         (void) printf("L%llx", (u_longlong_t)zb->zb_level);
1478                 } else {
1479                         (void) printf(" ");
1480                 }
1481         }
1482
1483         snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1484         (void) printf("%s\n", blkbuf);
1485 }
1486
1487 static int
1488 visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1489     blkptr_t *bp, const zbookmark_phys_t *zb)
1490 {
1491         int err = 0;
1492
1493         if (bp->blk_birth == 0)
1494                 return (0);
1495
1496         print_indirect(bp, zb, dnp);
1497
1498         if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1499                 arc_flags_t flags = ARC_FLAG_WAIT;
1500                 int i;
1501                 blkptr_t *cbp;
1502                 int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1503                 arc_buf_t *buf;
1504                 uint64_t fill = 0;
1505
1506                 err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1507                     ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1508                 if (err)
1509                         return (err);
1510                 ASSERT(buf->b_data);
1511
1512                 /* recursively visit blocks below this */
1513                 cbp = buf->b_data;
1514                 for (i = 0; i < epb; i++, cbp++) {
1515                         zbookmark_phys_t czb;
1516
1517                         SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1518                             zb->zb_level - 1,
1519                             zb->zb_blkid * epb + i);
1520                         err = visit_indirect(spa, dnp, cbp, &czb);
1521                         if (err)
1522                                 break;
1523                         fill += BP_GET_FILL(cbp);
1524                 }
1525                 if (!err)
1526                         ASSERT3U(fill, ==, BP_GET_FILL(bp));
1527                 arc_buf_destroy(buf, &buf);
1528         }
1529
1530         return (err);
1531 }
1532
1533 /*ARGSUSED*/
1534 static void
1535 dump_indirect(dnode_t *dn)
1536 {
1537         dnode_phys_t *dnp = dn->dn_phys;
1538         int j;
1539         zbookmark_phys_t czb;
1540
1541         (void) printf("Indirect blocks:\n");
1542
1543         SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1544             dn->dn_object, dnp->dn_nlevels - 1, 0);
1545         for (j = 0; j < dnp->dn_nblkptr; j++) {
1546                 czb.zb_blkid = j;
1547                 (void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1548                     &dnp->dn_blkptr[j], &czb);
1549         }
1550
1551         (void) printf("\n");
1552 }
1553
1554 /*ARGSUSED*/
1555 static void
1556 dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1557 {
1558         dsl_dir_phys_t *dd = data;
1559         time_t crtime;
1560         char nice[32];
1561
1562         /* make sure nicenum has enough space */
1563         CTASSERT(sizeof (nice) >= NN_NUMBUF_SZ);
1564
1565         if (dd == NULL)
1566                 return;
1567
1568         ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1569
1570         crtime = dd->dd_creation_time;
1571         (void) printf("\t\tcreation_time = %s", ctime(&crtime));
1572         (void) printf("\t\thead_dataset_obj = %llu\n",
1573             (u_longlong_t)dd->dd_head_dataset_obj);
1574         (void) printf("\t\tparent_dir_obj = %llu\n",
1575             (u_longlong_t)dd->dd_parent_obj);
1576         (void) printf("\t\torigin_obj = %llu\n",
1577             (u_longlong_t)dd->dd_origin_obj);
1578         (void) printf("\t\tchild_dir_zapobj = %llu\n",
1579             (u_longlong_t)dd->dd_child_dir_zapobj);
1580         zdb_nicenum(dd->dd_used_bytes, nice, sizeof (nice));
1581         (void) printf("\t\tused_bytes = %s\n", nice);
1582         zdb_nicenum(dd->dd_compressed_bytes, nice, sizeof (nice));
1583         (void) printf("\t\tcompressed_bytes = %s\n", nice);
1584         zdb_nicenum(dd->dd_uncompressed_bytes, nice, sizeof (nice));
1585         (void) printf("\t\tuncompressed_bytes = %s\n", nice);
1586         zdb_nicenum(dd->dd_quota, nice, sizeof (nice));
1587         (void) printf("\t\tquota = %s\n", nice);
1588         zdb_nicenum(dd->dd_reserved, nice, sizeof (nice));
1589         (void) printf("\t\treserved = %s\n", nice);
1590         (void) printf("\t\tprops_zapobj = %llu\n",
1591             (u_longlong_t)dd->dd_props_zapobj);
1592         (void) printf("\t\tdeleg_zapobj = %llu\n",
1593             (u_longlong_t)dd->dd_deleg_zapobj);
1594         (void) printf("\t\tflags = %llx\n",
1595             (u_longlong_t)dd->dd_flags);
1596
1597 #define DO(which) \
1598         zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice, \
1599             sizeof (nice)); \
1600         (void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1601         DO(HEAD);
1602         DO(SNAP);
1603         DO(CHILD);
1604         DO(CHILD_RSRV);
1605         DO(REFRSRV);
1606 #undef DO
1607         (void) printf("\t\tclones = %llu\n",
1608             (u_longlong_t)dd->dd_clones);
1609 }
1610
1611 /*ARGSUSED*/
1612 static void
1613 dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1614 {
1615         dsl_dataset_phys_t *ds = data;
1616         time_t crtime;
1617         char used[32], compressed[32], uncompressed[32], unique[32];
1618         char blkbuf[BP_SPRINTF_LEN];
1619
1620         /* make sure nicenum has enough space */
1621         CTASSERT(sizeof (used) >= NN_NUMBUF_SZ);
1622         CTASSERT(sizeof (compressed) >= NN_NUMBUF_SZ);
1623         CTASSERT(sizeof (uncompressed) >= NN_NUMBUF_SZ);
1624         CTASSERT(sizeof (unique) >= NN_NUMBUF_SZ);
1625
1626         if (ds == NULL)
1627                 return;
1628
1629         ASSERT(size == sizeof (*ds));
1630         crtime = ds->ds_creation_time;
1631         zdb_nicenum(ds->ds_referenced_bytes, used, sizeof (used));
1632         zdb_nicenum(ds->ds_compressed_bytes, compressed, sizeof (compressed));
1633         zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed,
1634             sizeof (uncompressed));
1635         zdb_nicenum(ds->ds_unique_bytes, unique, sizeof (unique));
1636         snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1637
1638         (void) printf("\t\tdir_obj = %llu\n",
1639             (u_longlong_t)ds->ds_dir_obj);
1640         (void) printf("\t\tprev_snap_obj = %llu\n",
1641             (u_longlong_t)ds->ds_prev_snap_obj);
1642         (void) printf("\t\tprev_snap_txg = %llu\n",
1643             (u_longlong_t)ds->ds_prev_snap_txg);
1644         (void) printf("\t\tnext_snap_obj = %llu\n",
1645             (u_longlong_t)ds->ds_next_snap_obj);
1646         (void) printf("\t\tsnapnames_zapobj = %llu\n",
1647             (u_longlong_t)ds->ds_snapnames_zapobj);
1648         (void) printf("\t\tnum_children = %llu\n",
1649             (u_longlong_t)ds->ds_num_children);
1650         (void) printf("\t\tuserrefs_obj = %llu\n",
1651             (u_longlong_t)ds->ds_userrefs_obj);
1652         (void) printf("\t\tcreation_time = %s", ctime(&crtime));
1653         (void) printf("\t\tcreation_txg = %llu\n",
1654             (u_longlong_t)ds->ds_creation_txg);
1655         (void) printf("\t\tdeadlist_obj = %llu\n",
1656             (u_longlong_t)ds->ds_deadlist_obj);
1657         (void) printf("\t\tused_bytes = %s\n", used);
1658         (void) printf("\t\tcompressed_bytes = %s\n", compressed);
1659         (void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1660         (void) printf("\t\tunique = %s\n", unique);
1661         (void) printf("\t\tfsid_guid = %llu\n",
1662             (u_longlong_t)ds->ds_fsid_guid);
1663         (void) printf("\t\tguid = %llu\n",
1664             (u_longlong_t)ds->ds_guid);
1665         (void) printf("\t\tflags = %llx\n",
1666             (u_longlong_t)ds->ds_flags);
1667         (void) printf("\t\tnext_clones_obj = %llu\n",
1668             (u_longlong_t)ds->ds_next_clones_obj);
1669         (void) printf("\t\tprops_obj = %llu\n",
1670             (u_longlong_t)ds->ds_props_obj);
1671         (void) printf("\t\tbp = %s\n", blkbuf);
1672 }
1673
1674 /* ARGSUSED */
1675 static int
1676 dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1677 {
1678         char blkbuf[BP_SPRINTF_LEN];
1679
1680         if (bp->blk_birth != 0) {
1681                 snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1682                 (void) printf("\t%s\n", blkbuf);
1683         }
1684         return (0);
1685 }
1686
1687 static void
1688 dump_bptree(objset_t *os, uint64_t obj, const char *name)
1689 {
1690         char bytes[32];
1691         bptree_phys_t *bt;
1692         dmu_buf_t *db;
1693
1694         /* make sure nicenum has enough space */
1695         CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1696
1697         if (dump_opt['d'] < 3)
1698                 return;
1699
1700         VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1701         bt = db->db_data;
1702         zdb_nicenum(bt->bt_bytes, bytes, sizeof (bytes));
1703         (void) printf("\n    %s: %llu datasets, %s\n",
1704             name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1705         dmu_buf_rele(db, FTAG);
1706
1707         if (dump_opt['d'] < 5)
1708                 return;
1709
1710         (void) printf("\n");
1711
1712         (void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1713 }
1714
1715 /* ARGSUSED */
1716 static int
1717 dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1718 {
1719         char blkbuf[BP_SPRINTF_LEN];
1720
1721         ASSERT(bp->blk_birth != 0);
1722         snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1723         (void) printf("\t%s\n", blkbuf);
1724         return (0);
1725 }
1726
1727 static void
1728 dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
1729 {
1730         char bytes[32];
1731         char comp[32];
1732         char uncomp[32];
1733
1734         /* make sure nicenum has enough space */
1735         CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1736         CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1737         CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1738
1739         if (dump_opt['d'] < 3)
1740                 return;
1741
1742         zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes, sizeof (bytes));
1743         if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1744                 zdb_nicenum(bpo->bpo_phys->bpo_comp, comp, sizeof (comp));
1745                 zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp, sizeof (uncomp));
1746                 (void) printf("    %*s: object %llu, %llu local blkptrs, "
1747                     "%llu subobjs in object %llu, %s (%s/%s comp)\n",
1748                     indent * 8, name,
1749                     (u_longlong_t)bpo->bpo_object,
1750                     (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1751                     (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1752                     (u_longlong_t)bpo->bpo_phys->bpo_subobjs,
1753                     bytes, comp, uncomp);
1754
1755                 for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1756                         uint64_t subobj;
1757                         bpobj_t subbpo;
1758                         int error;
1759                         VERIFY0(dmu_read(bpo->bpo_os,
1760                             bpo->bpo_phys->bpo_subobjs,
1761                             i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1762                         error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1763                         if (error != 0) {
1764                                 (void) printf("ERROR %u while trying to open "
1765                                     "subobj id %llu\n",
1766                                     error, (u_longlong_t)subobj);
1767                                 continue;
1768                         }
1769                         dump_full_bpobj(&subbpo, "subobj", indent + 1);
1770                         bpobj_close(&subbpo);
1771                 }
1772         } else {
1773                 (void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1774                     indent * 8, name,
1775                     (u_longlong_t)bpo->bpo_object,
1776                     (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1777                     bytes);
1778         }
1779
1780         if (dump_opt['d'] < 5)
1781                 return;
1782
1783
1784         if (indent == 0) {
1785                 (void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1786                 (void) printf("\n");
1787         }
1788 }
1789
1790 static void
1791 bpobj_count_refd(bpobj_t *bpo)
1792 {
1793         mos_obj_refd(bpo->bpo_object);
1794
1795         if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1796                 mos_obj_refd(bpo->bpo_phys->bpo_subobjs);
1797                 for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1798                         uint64_t subobj;
1799                         bpobj_t subbpo;
1800                         int error;
1801                         VERIFY0(dmu_read(bpo->bpo_os,
1802                             bpo->bpo_phys->bpo_subobjs,
1803                             i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1804                         error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1805                         if (error != 0) {
1806                                 (void) printf("ERROR %u while trying to open "
1807                                     "subobj id %llu\n",
1808                                     error, (u_longlong_t)subobj);
1809                                 continue;
1810                         }
1811                         bpobj_count_refd(&subbpo);
1812                         bpobj_close(&subbpo);
1813                 }
1814         }
1815 }
1816
1817 static void
1818 dump_deadlist(dsl_deadlist_t *dl)
1819 {
1820         dsl_deadlist_entry_t *dle;
1821         uint64_t unused;
1822         char bytes[32];
1823         char comp[32];
1824         char uncomp[32];
1825         uint64_t empty_bpobj =
1826             dmu_objset_spa(dl->dl_os)->spa_dsl_pool->dp_empty_bpobj;
1827
1828         /* force the tree to be loaded */
1829         dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1830
1831         if (dl->dl_oldfmt) {
1832                 if (dl->dl_bpobj.bpo_object != empty_bpobj)
1833                         bpobj_count_refd(&dl->dl_bpobj);
1834         } else {
1835                 mos_obj_refd(dl->dl_object);
1836                 for (dle = avl_first(&dl->dl_tree); dle;
1837                     dle = AVL_NEXT(&dl->dl_tree, dle)) {
1838                         if (dle->dle_bpobj.bpo_object != empty_bpobj)
1839                                 bpobj_count_refd(&dle->dle_bpobj);
1840                 }
1841         }
1842
1843         /* make sure nicenum has enough space */
1844         CTASSERT(sizeof (bytes) >= NN_NUMBUF_SZ);
1845         CTASSERT(sizeof (comp) >= NN_NUMBUF_SZ);
1846         CTASSERT(sizeof (uncomp) >= NN_NUMBUF_SZ);
1847
1848         if (dump_opt['d'] < 3)
1849                 return;
1850
1851         if (dl->dl_oldfmt) {
1852                 dump_full_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1853                 return;
1854         }
1855
1856         zdb_nicenum(dl->dl_phys->dl_used, bytes, sizeof (bytes));
1857         zdb_nicenum(dl->dl_phys->dl_comp, comp, sizeof (comp));
1858         zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp, sizeof (uncomp));
1859         (void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1860             bytes, comp, uncomp);
1861
1862         if (dump_opt['d'] < 4)
1863                 return;
1864
1865         (void) printf("\n");
1866
1867         for (dle = avl_first(&dl->dl_tree); dle;
1868             dle = AVL_NEXT(&dl->dl_tree, dle)) {
1869                 if (dump_opt['d'] >= 5) {
1870                         char buf[128];
1871                         (void) snprintf(buf, sizeof (buf),
1872                             "mintxg %llu -> obj %llu",
1873                             (longlong_t)dle->dle_mintxg,
1874                             (longlong_t)dle->dle_bpobj.bpo_object);
1875                         dump_full_bpobj(&dle->dle_bpobj, buf, 0);
1876                 } else {
1877                         (void) printf("mintxg %llu -> obj %llu\n",
1878                             (longlong_t)dle->dle_mintxg,
1879                             (longlong_t)dle->dle_bpobj.bpo_object);
1880                 }
1881         }
1882 }
1883
1884 static avl_tree_t idx_tree;
1885 static avl_tree_t domain_tree;
1886 static boolean_t fuid_table_loaded;
1887 static objset_t *sa_os = NULL;
1888 static sa_attr_type_t *sa_attr_table = NULL;
1889
1890 static int
1891 open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
1892 {
1893         int err;
1894         uint64_t sa_attrs = 0;
1895         uint64_t version = 0;
1896
1897         VERIFY3P(sa_os, ==, NULL);
1898         err = dmu_objset_own(path, type, B_TRUE, tag, osp);
1899         if (err != 0) {
1900                 (void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
1901                     strerror(err));
1902                 return (err);
1903         }
1904
1905         if (dmu_objset_type(*osp) == DMU_OST_ZFS) {
1906                 (void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1907                     8, 1, &version);
1908                 if (version >= ZPL_VERSION_SA) {
1909                         (void) zap_lookup(*osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1910                             8, 1, &sa_attrs);
1911                 }
1912                 err = sa_setup(*osp, sa_attrs, zfs_attr_table, ZPL_END,
1913                     &sa_attr_table);
1914                 if (err != 0) {
1915                         (void) fprintf(stderr, "sa_setup failed: %s\n",
1916                             strerror(err));
1917                         dmu_objset_disown(*osp, tag);
1918                         *osp = NULL;
1919                 }
1920         }
1921         sa_os = *osp;
1922
1923         return (0);
1924 }
1925
1926 static void
1927 close_objset(objset_t *os, void *tag)
1928 {
1929         VERIFY3P(os, ==, sa_os);
1930         if (os->os_sa != NULL)
1931                 sa_tear_down(os);
1932         dmu_objset_disown(os, tag);
1933         sa_attr_table = NULL;
1934         sa_os = NULL;
1935 }
1936
1937 static void
1938 fuid_table_destroy()
1939 {
1940         if (fuid_table_loaded) {
1941                 zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1942                 fuid_table_loaded = B_FALSE;
1943         }
1944 }
1945
1946 /*
1947  * print uid or gid information.
1948  * For normal POSIX id just the id is printed in decimal format.
1949  * For CIFS files with FUID the fuid is printed in hex followed by
1950  * the domain-rid string.
1951  */
1952 static void
1953 print_idstr(uint64_t id, const char *id_type)
1954 {
1955         if (FUID_INDEX(id)) {
1956                 char *domain;
1957
1958                 domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1959                 (void) printf("\t%s     %llx [%s-%d]\n", id_type,
1960                     (u_longlong_t)id, domain, (int)FUID_RID(id));
1961         } else {
1962                 (void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1963         }
1964
1965 }
1966
1967 static void
1968 dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1969 {
1970         uint32_t uid_idx, gid_idx;
1971
1972         uid_idx = FUID_INDEX(uid);
1973         gid_idx = FUID_INDEX(gid);
1974
1975         /* Load domain table, if not already loaded */
1976         if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1977                 uint64_t fuid_obj;
1978
1979                 /* first find the fuid object.  It lives in the master node */
1980                 VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1981                     8, 1, &fuid_obj) == 0);
1982                 zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1983                 (void) zfs_fuid_table_load(os, fuid_obj,
1984                     &idx_tree, &domain_tree);
1985                 fuid_table_loaded = B_TRUE;
1986         }
1987
1988         print_idstr(uid, "uid");
1989         print_idstr(gid, "gid");
1990 }
1991
1992 /*ARGSUSED*/
1993 static void
1994 dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1995 {
1996         char path[MAXPATHLEN * 2];      /* allow for xattr and failure prefix */
1997         sa_handle_t *hdl;
1998         uint64_t xattr, rdev, gen;
1999         uint64_t uid, gid, mode, fsize, parent, links;
2000         uint64_t pflags;
2001         uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
2002         time_t z_crtime, z_atime, z_mtime, z_ctime;
2003         sa_bulk_attr_t bulk[12];
2004         int idx = 0;
2005         int error;
2006
2007         VERIFY3P(os, ==, sa_os);
2008         if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
2009                 (void) printf("Failed to get handle for SA znode\n");
2010                 return;
2011         }
2012
2013         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
2014         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
2015         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
2016             &links, 8);
2017         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
2018         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
2019             &mode, 8);
2020         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
2021             NULL, &parent, 8);
2022         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
2023             &fsize, 8);
2024         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
2025             acctm, 16);
2026         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
2027             modtm, 16);
2028         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
2029             crtm, 16);
2030         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
2031             chgtm, 16);
2032         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
2033             &pflags, 8);
2034
2035         if (sa_bulk_lookup(hdl, bulk, idx)) {
2036                 (void) sa_handle_destroy(hdl);
2037                 return;
2038         }
2039
2040         z_crtime = (time_t)crtm[0];
2041         z_atime = (time_t)acctm[0];
2042         z_mtime = (time_t)modtm[0];
2043         z_ctime = (time_t)chgtm[0];
2044
2045         if (dump_opt['d'] > 4) {
2046                 error = zfs_obj_to_path(os, object, path, sizeof (path));
2047                 if (error == ESTALE) {
2048                         (void) snprintf(path, sizeof (path), "on delete queue");
2049                 } else if (error != 0) {
2050                         leaked_objects++;
2051                         (void) snprintf(path, sizeof (path),
2052                             "path not found, possibly leaked");
2053                 }
2054                 (void) printf("\tpath   %s\n", path);
2055         }
2056         dump_uidgid(os, uid, gid);
2057         (void) printf("\tatime  %s", ctime(&z_atime));
2058         (void) printf("\tmtime  %s", ctime(&z_mtime));
2059         (void) printf("\tctime  %s", ctime(&z_ctime));
2060         (void) printf("\tcrtime %s", ctime(&z_crtime));
2061         (void) printf("\tgen    %llu\n", (u_longlong_t)gen);
2062         (void) printf("\tmode   %llo\n", (u_longlong_t)mode);
2063         (void) printf("\tsize   %llu\n", (u_longlong_t)fsize);
2064         (void) printf("\tparent %llu\n", (u_longlong_t)parent);
2065         (void) printf("\tlinks  %llu\n", (u_longlong_t)links);
2066         (void) printf("\tpflags %llx\n", (u_longlong_t)pflags);
2067         if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
2068             sizeof (uint64_t)) == 0)
2069                 (void) printf("\txattr  %llu\n", (u_longlong_t)xattr);
2070         if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
2071             sizeof (uint64_t)) == 0)
2072                 (void) printf("\trdev   0x%016llx\n", (u_longlong_t)rdev);
2073         sa_handle_destroy(hdl);
2074 }
2075
2076 /*ARGSUSED*/
2077 static void
2078 dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
2079 {
2080 }
2081
2082 /*ARGSUSED*/
2083 static void
2084 dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
2085 {
2086 }
2087
2088 static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
2089         dump_none,              /* unallocated                  */
2090         dump_zap,               /* object directory             */
2091         dump_uint64,            /* object array                 */
2092         dump_none,              /* packed nvlist                */
2093         dump_packed_nvlist,     /* packed nvlist size           */
2094         dump_none,              /* bpobj                        */
2095         dump_bpobj,             /* bpobj header                 */
2096         dump_none,              /* SPA space map header         */
2097         dump_none,              /* SPA space map                */
2098         dump_none,              /* ZIL intent log               */
2099         dump_dnode,             /* DMU dnode                    */
2100         dump_dmu_objset,        /* DMU objset                   */
2101         dump_dsl_dir,           /* DSL directory                */
2102         dump_zap,               /* DSL directory child map      */
2103         dump_zap,               /* DSL dataset snap map         */
2104         dump_zap,               /* DSL props                    */
2105         dump_dsl_dataset,       /* DSL dataset                  */
2106         dump_znode,             /* ZFS znode                    */
2107         dump_acl,               /* ZFS V0 ACL                   */
2108         dump_uint8,             /* ZFS plain file               */
2109         dump_zpldir,            /* ZFS directory                */
2110         dump_zap,               /* ZFS master node              */
2111         dump_zap,               /* ZFS delete queue             */
2112         dump_uint8,             /* zvol object                  */
2113         dump_zap,               /* zvol prop                    */
2114         dump_uint8,             /* other uint8[]                */
2115         dump_uint64,            /* other uint64[]               */
2116         dump_zap,               /* other ZAP                    */
2117         dump_zap,               /* persistent error log         */
2118         dump_uint8,             /* SPA history                  */
2119         dump_history_offsets,   /* SPA history offsets          */
2120         dump_zap,               /* Pool properties              */
2121         dump_zap,               /* DSL permissions              */
2122         dump_acl,               /* ZFS ACL                      */
2123         dump_uint8,             /* ZFS SYSACL                   */
2124         dump_none,              /* FUID nvlist                  */
2125         dump_packed_nvlist,     /* FUID nvlist size             */
2126         dump_zap,               /* DSL dataset next clones      */
2127         dump_zap,               /* DSL scrub queue              */
2128         dump_zap,               /* ZFS user/group used          */
2129         dump_zap,               /* ZFS user/group quota         */
2130         dump_zap,               /* snapshot refcount tags       */
2131         dump_ddt_zap,           /* DDT ZAP object               */
2132         dump_zap,               /* DDT statistics               */
2133         dump_znode,             /* SA object                    */
2134         dump_zap,               /* SA Master Node               */
2135         dump_sa_attrs,          /* SA attribute registration    */
2136         dump_sa_layouts,        /* SA attribute layouts         */
2137         dump_zap,               /* DSL scrub translations       */
2138         dump_none,              /* fake dedup BP                */
2139         dump_zap,               /* deadlist                     */
2140         dump_none,              /* deadlist hdr                 */
2141         dump_zap,               /* dsl clones                   */
2142         dump_bpobj_subobjs,     /* bpobj subobjs                */
2143         dump_unknown,           /* Unknown type, must be last   */
2144 };
2145
2146 static void
2147 dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header,
2148     uint64_t *dnode_slots_used)
2149 {
2150         dmu_buf_t *db = NULL;
2151         dmu_object_info_t doi;
2152         dnode_t *dn;
2153         void *bonus = NULL;
2154         size_t bsize = 0;
2155         char iblk[32], dblk[32], lsize[32], asize[32], fill[32], dnsize[32];
2156         char bonus_size[32];
2157         char aux[50];
2158         int error;
2159
2160         /* make sure nicenum has enough space */
2161         CTASSERT(sizeof (iblk) >= NN_NUMBUF_SZ);
2162         CTASSERT(sizeof (dblk) >= NN_NUMBUF_SZ);
2163         CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
2164         CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
2165         CTASSERT(sizeof (bonus_size) >= NN_NUMBUF_SZ);
2166
2167         if (*print_header) {
2168                 (void) printf("\n%10s  %3s  %5s  %5s  %5s  %6s  %5s  %6s  %s\n",
2169                     "Object", "lvl", "iblk", "dblk", "dsize", "dnsize",
2170                     "lsize", "%full", "type");
2171                 *print_header = 0;
2172         }
2173
2174         if (object == 0) {
2175                 dn = DMU_META_DNODE(os);
2176         } else {
2177                 error = dmu_bonus_hold(os, object, FTAG, &db);
2178                 if (error)
2179                         fatal("dmu_bonus_hold(%llu) failed, errno %u",
2180                             object, error);
2181                 bonus = db->db_data;
2182                 bsize = db->db_size;
2183                 dn = DB_DNODE((dmu_buf_impl_t *)db);
2184         }
2185         dmu_object_info_from_dnode(dn, &doi);
2186
2187         if (dnode_slots_used != NULL)
2188                 *dnode_slots_used = doi.doi_dnodesize / DNODE_MIN_SIZE;
2189
2190         zdb_nicenum(doi.doi_metadata_block_size, iblk, sizeof (iblk));
2191         zdb_nicenum(doi.doi_data_block_size, dblk, sizeof (dblk));
2192         zdb_nicenum(doi.doi_max_offset, lsize, sizeof (lsize));
2193         zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize, sizeof (asize));
2194         zdb_nicenum(doi.doi_bonus_size, bonus_size, sizeof (bonus_size));
2195         zdb_nicenum(doi.doi_dnodesize, dnsize, sizeof (dnsize));
2196         (void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
2197             doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
2198             doi.doi_max_offset);
2199
2200         aux[0] = '\0';
2201
2202         if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
2203                 (void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
2204                     ZDB_CHECKSUM_NAME(doi.doi_checksum));
2205         }
2206
2207         if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
2208                 (void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
2209                     ZDB_COMPRESS_NAME(doi.doi_compress));
2210         }
2211
2212         (void) printf("%10" PRIu64
2213             "  %3u  %5s  %5s  %5s  %5s  %5s  %6s  %s%s\n",
2214             object, doi.doi_indirection, iblk, dblk,
2215             asize, dnsize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
2216
2217         if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
2218                 (void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %5s  %6s  %s\n",
2219                     "", "", "", "", "", "", bonus_size, "bonus",
2220                     ZDB_OT_NAME(doi.doi_bonus_type));
2221         }
2222
2223         if (verbosity >= 4) {
2224                 (void) printf("\tdnode flags: %s%s%s\n",
2225                     (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
2226                     "USED_BYTES " : "",
2227                     (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
2228                     "USERUSED_ACCOUNTED " : "",
2229                     (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
2230                     "SPILL_BLKPTR" : "");
2231                 (void) printf("\tdnode maxblkid: %llu\n",
2232                     (longlong_t)dn->dn_phys->dn_maxblkid);
2233
2234                 object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
2235                     bonus, bsize);
2236                 object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
2237                 *print_header = 1;
2238         }
2239
2240         if (verbosity >= 5)
2241                 dump_indirect(dn);
2242
2243         if (verbosity >= 5) {
2244                 /*
2245                  * Report the list of segments that comprise the object.
2246                  */
2247                 uint64_t start = 0;
2248                 uint64_t end;
2249                 uint64_t blkfill = 1;
2250                 int minlvl = 1;
2251
2252                 if (dn->dn_type == DMU_OT_DNODE) {
2253                         minlvl = 0;
2254                         blkfill = DNODES_PER_BLOCK;
2255                 }
2256
2257                 for (;;) {
2258                         char segsize[32];
2259                         /* make sure nicenum has enough space */
2260                         CTASSERT(sizeof (segsize) >= NN_NUMBUF_SZ);
2261                         error = dnode_next_offset(dn,
2262                             0, &start, minlvl, blkfill, 0);
2263                         if (error)
2264                                 break;
2265                         end = start;
2266                         error = dnode_next_offset(dn,
2267                             DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
2268                         zdb_nicenum(end - start, segsize, sizeof (segsize));
2269                         (void) printf("\t\tsegment [%016llx, %016llx)"
2270                             " size %5s\n", (u_longlong_t)start,
2271                             (u_longlong_t)end, segsize);
2272                         if (error)
2273                                 break;
2274                         start = end;
2275                 }
2276         }
2277
2278         if (db != NULL)
2279                 dmu_buf_rele(db, FTAG);
2280 }
2281
2282 static void
2283 count_dir_mos_objects(dsl_dir_t *dd)
2284 {
2285         mos_obj_refd(dd->dd_object);
2286         mos_obj_refd(dsl_dir_phys(dd)->dd_child_dir_zapobj);
2287         mos_obj_refd(dsl_dir_phys(dd)->dd_deleg_zapobj);
2288         mos_obj_refd(dsl_dir_phys(dd)->dd_props_zapobj);
2289         mos_obj_refd(dsl_dir_phys(dd)->dd_clones);
2290 }
2291
2292 static void
2293 count_ds_mos_objects(dsl_dataset_t *ds)
2294 {
2295         mos_obj_refd(ds->ds_object);
2296         mos_obj_refd(dsl_dataset_phys(ds)->ds_next_clones_obj);
2297         mos_obj_refd(dsl_dataset_phys(ds)->ds_props_obj);
2298         mos_obj_refd(dsl_dataset_phys(ds)->ds_userrefs_obj);
2299         mos_obj_refd(dsl_dataset_phys(ds)->ds_snapnames_zapobj);
2300
2301         if (!dsl_dataset_is_snapshot(ds)) {
2302                 count_dir_mos_objects(ds->ds_dir);
2303         }
2304 }
2305
2306 static const char *objset_types[DMU_OST_NUMTYPES] = {
2307         "NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
2308
2309 static void
2310 dump_dir(objset_t *os)
2311 {
2312         dmu_objset_stats_t dds;
2313         uint64_t object, object_count;
2314         uint64_t refdbytes, usedobjs, scratch;
2315         char numbuf[32];
2316         char blkbuf[BP_SPRINTF_LEN + 20];
2317         char osname[ZFS_MAX_DATASET_NAME_LEN];
2318         const char *type = "UNKNOWN";
2319         int verbosity = dump_opt['d'];
2320         int print_header = 1;
2321         unsigned i;
2322         int error;
2323         uint64_t total_slots_used = 0;
2324         uint64_t max_slot_used = 0;
2325         uint64_t dnode_slots;
2326
2327         /* make sure nicenum has enough space */
2328         CTASSERT(sizeof (numbuf) >= NN_NUMBUF_SZ);
2329
2330         dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
2331         dmu_objset_fast_stat(os, &dds);
2332         dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
2333
2334         if (dds.dds_type < DMU_OST_NUMTYPES)
2335                 type = objset_types[dds.dds_type];
2336
2337         if (dds.dds_type == DMU_OST_META) {
2338                 dds.dds_creation_txg = TXG_INITIAL;
2339                 usedobjs = BP_GET_FILL(os->os_rootbp);
2340                 refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
2341                     dd_used_bytes;
2342         } else {
2343                 dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
2344         }
2345
2346         ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
2347
2348         zdb_nicenum(refdbytes, numbuf, sizeof (numbuf));
2349
2350         if (verbosity >= 4) {
2351                 (void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
2352                 (void) snprintf_blkptr(blkbuf + strlen(blkbuf),
2353                     sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
2354         } else {
2355                 blkbuf[0] = '\0';
2356         }
2357
2358         dmu_objset_name(os, osname);
2359
2360         (void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
2361             "%s, %llu objects%s%s\n",
2362             osname, type, (u_longlong_t)dmu_objset_id(os),
2363             (u_longlong_t)dds.dds_creation_txg,
2364             numbuf, (u_longlong_t)usedobjs, blkbuf,
2365             (dds.dds_inconsistent) ? " (inconsistent)" : "");
2366
2367         if (zopt_objects != 0) {
2368                 for (i = 0; i < zopt_objects; i++)
2369                         dump_object(os, zopt_object[i], verbosity,
2370                             &print_header, NULL);
2371                 (void) printf("\n");
2372                 return;
2373         }
2374
2375         if (dump_opt['i'] != 0 || verbosity >= 2)
2376                 dump_intent_log(dmu_objset_zil(os));
2377
2378         if (dmu_objset_ds(os) != NULL) {
2379                 dsl_dataset_t *ds = dmu_objset_ds(os);
2380                 dump_deadlist(&ds->ds_deadlist);
2381
2382                 if (dsl_dataset_remap_deadlist_exists(ds)) {
2383                         (void) printf("ds_remap_deadlist:\n");
2384                         dump_deadlist(&ds->ds_remap_deadlist);
2385                 }
2386                 count_ds_mos_objects(ds);
2387         }
2388
2389         if (verbosity < 2)
2390                 return;
2391
2392         if (BP_IS_HOLE(os->os_rootbp))
2393                 return;
2394
2395         dump_object(os, 0, verbosity, &print_header, NULL);
2396         object_count = 0;
2397         if (DMU_USERUSED_DNODE(os) != NULL &&
2398             DMU_USERUSED_DNODE(os)->dn_type != 0) {
2399                 dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header,
2400                     NULL);
2401                 dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header,
2402                     NULL);
2403         }
2404
2405         object = 0;
2406         while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
2407                 dump_object(os, object, verbosity, &print_header, &dnode_slots);
2408                 object_count++;
2409                 total_slots_used += dnode_slots;
2410                 max_slot_used = object + dnode_slots - 1;
2411         }
2412
2413         (void) printf("\n");
2414
2415         (void) printf("    Dnode slots:\n");
2416         (void) printf("\tTotal used:    %10llu\n",
2417             (u_longlong_t)total_slots_used);
2418         (void) printf("\tMax used:      %10llu\n",
2419             (u_longlong_t)max_slot_used);
2420         (void) printf("\tPercent empty: %10lf\n",
2421             (double)(max_slot_used - total_slots_used)*100 /
2422             (double)max_slot_used);
2423
2424         (void) printf("\n");
2425
2426         if (error != ESRCH) {
2427                 (void) fprintf(stderr, "dmu_object_next() = %d\n", error);
2428                 abort();
2429         }
2430
2431         ASSERT3U(object_count, ==, usedobjs);
2432
2433         if (leaked_objects != 0) {
2434                 (void) printf("%d potentially leaked objects detected\n",
2435                     leaked_objects);
2436                 leaked_objects = 0;
2437         }
2438 }
2439
2440 static void
2441 dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
2442 {
2443         time_t timestamp = ub->ub_timestamp;
2444
2445         (void) printf("%s", header ? header : "");
2446         (void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
2447         (void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
2448         (void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
2449         (void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
2450         (void) printf("\ttimestamp = %llu UTC = %s",
2451             (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
2452
2453         (void) printf("\tmmp_magic = %016llx\n",
2454             (u_longlong_t)ub->ub_mmp_magic);
2455         if (MMP_VALID(ub)) {
2456                 (void) printf("\tmmp_delay = %0llu\n",
2457                     (u_longlong_t)ub->ub_mmp_delay);
2458                 if (MMP_SEQ_VALID(ub))
2459                         (void) printf("\tmmp_seq = %u\n",
2460                             (unsigned int) MMP_SEQ(ub));
2461                 if (MMP_FAIL_INT_VALID(ub))
2462                         (void) printf("\tmmp_fail = %u\n",
2463                             (unsigned int) MMP_FAIL_INT(ub));
2464                 if (MMP_INTERVAL_VALID(ub))
2465                         (void) printf("\tmmp_write = %u\n",
2466                             (unsigned int) MMP_INTERVAL(ub));
2467                 /* After MMP_* to make summarize_uberblock_mmp cleaner */
2468                 (void) printf("\tmmp_valid = %x\n",
2469                     (unsigned int) ub->ub_mmp_config & 0xFF);
2470         }
2471
2472         if (dump_opt['u'] >= 3) {
2473                 char blkbuf[BP_SPRINTF_LEN];
2474                 snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
2475                 (void) printf("\trootbp = %s\n", blkbuf);
2476         }
2477         (void) printf("\tcheckpoint_txg = %llu\n",
2478             (u_longlong_t)ub->ub_checkpoint_txg);
2479         (void) printf("%s", footer ? footer : "");
2480 }
2481
2482 static void
2483 dump_config(spa_t *spa)
2484 {
2485         dmu_buf_t *db;
2486         size_t nvsize = 0;
2487         int error = 0;
2488
2489
2490         error = dmu_bonus_hold(spa->spa_meta_objset,
2491             spa->spa_config_object, FTAG, &db);
2492
2493         if (error == 0) {
2494                 nvsize = *(uint64_t *)db->db_data;
2495                 dmu_buf_rele(db, FTAG);
2496
2497                 (void) printf("\nMOS Configuration:\n");
2498                 dump_packed_nvlist(spa->spa_meta_objset,
2499                     spa->spa_config_object, (void *)&nvsize, 1);
2500         } else {
2501                 (void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
2502                     (u_longlong_t)spa->spa_config_object, error);
2503         }
2504 }
2505
2506 static void
2507 dump_cachefile(const char *cachefile)
2508 {
2509         int fd;
2510         struct stat64 statbuf;
2511         char *buf;
2512         nvlist_t *config;
2513
2514         if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2515                 (void) fprintf(stderr, "cannot open '%s': %s\n", cachefile,
2516                     strerror(errno));
2517                 exit(1);
2518         }
2519
2520         if (fstat64(fd, &statbuf) != 0) {
2521                 (void) fprintf(stderr, "failed to stat '%s': %s\n", cachefile,
2522                     strerror(errno));
2523                 exit(1);
2524         }
2525
2526         if ((buf = malloc(statbuf.st_size)) == NULL) {
2527                 (void) fprintf(stderr, "failed to allocate %llu bytes\n",
2528                     (u_longlong_t)statbuf.st_size);
2529                 exit(1);
2530         }
2531
2532         if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2533                 (void) fprintf(stderr, "failed to read %llu bytes\n",
2534                     (u_longlong_t)statbuf.st_size);
2535                 exit(1);
2536         }
2537
2538         (void) close(fd);
2539
2540         if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2541                 (void) fprintf(stderr, "failed to unpack nvlist\n");
2542                 exit(1);
2543         }
2544
2545         free(buf);
2546
2547         dump_nvlist(config, 0);
2548
2549         nvlist_free(config);
2550 }
2551
2552 #define ZDB_MAX_UB_HEADER_SIZE 32
2553
2554 static void
2555 dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2556 {
2557         vdev_t vd;
2558         vdev_t *vdp = &vd;
2559         char header[ZDB_MAX_UB_HEADER_SIZE];
2560
2561         vd.vdev_ashift = ashift;
2562         vdp->vdev_top = vdp;
2563
2564         for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2565                 uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2566                 uberblock_t *ub = (void *)((char *)lbl + uoff);
2567
2568                 if (uberblock_verify(ub))
2569                         continue;
2570
2571                 if ((dump_opt['u'] < 4) &&
2572                     (ub->ub_mmp_magic == MMP_MAGIC) && ub->ub_mmp_delay &&
2573                     (i >= VDEV_UBERBLOCK_COUNT(&vd) - MMP_BLOCKS_PER_LABEL))
2574                         continue;
2575
2576                 (void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2577                     "Uberblock[%d]\n", i);
2578                 dump_uberblock(ub, header, "");
2579         }
2580 }
2581
2582 static char curpath[PATH_MAX];
2583
2584 /*
2585  * Iterate through the path components, recursively passing
2586  * current one's obj and remaining path until we find the obj
2587  * for the last one.
2588  */
2589 static int
2590 dump_path_impl(objset_t *os, uint64_t obj, char *name)
2591 {
2592         int err;
2593         int header = 1;
2594         uint64_t child_obj;
2595         char *s;
2596         dmu_buf_t *db;
2597         dmu_object_info_t doi;
2598
2599         if ((s = strchr(name, '/')) != NULL)
2600                 *s = '\0';
2601         err = zap_lookup(os, obj, name, 8, 1, &child_obj);
2602
2603         (void) strlcat(curpath, name, sizeof (curpath));
2604
2605         if (err != 0) {
2606                 (void) fprintf(stderr, "failed to lookup %s: %s\n",
2607                     curpath, strerror(err));
2608                 return (err);
2609         }
2610
2611         child_obj = ZFS_DIRENT_OBJ(child_obj);
2612         err = sa_buf_hold(os, child_obj, FTAG, &db);
2613         if (err != 0) {
2614                 (void) fprintf(stderr,
2615                     "failed to get SA dbuf for obj %llu: %s\n",
2616                     (u_longlong_t)child_obj, strerror(err));
2617                 return (EINVAL);
2618         }
2619         dmu_object_info_from_db(db, &doi);
2620         sa_buf_rele(db, FTAG);
2621
2622         if (doi.doi_bonus_type != DMU_OT_SA &&
2623             doi.doi_bonus_type != DMU_OT_ZNODE) {
2624                 (void) fprintf(stderr, "invalid bonus type %d for obj %llu\n",
2625                     doi.doi_bonus_type, (u_longlong_t)child_obj);
2626                 return (EINVAL);
2627         }
2628
2629         if (dump_opt['v'] > 6) {
2630                 (void) printf("obj=%llu %s type=%d bonustype=%d\n",
2631                     (u_longlong_t)child_obj, curpath, doi.doi_type,
2632                     doi.doi_bonus_type);
2633         }
2634
2635         (void) strlcat(curpath, "/", sizeof (curpath));
2636
2637         switch (doi.doi_type) {
2638         case DMU_OT_DIRECTORY_CONTENTS:
2639                 if (s != NULL && *(s + 1) != '\0')
2640                         return (dump_path_impl(os, child_obj, s + 1));
2641                 /*FALLTHROUGH*/
2642         case DMU_OT_PLAIN_FILE_CONTENTS:
2643                 dump_object(os, child_obj, dump_opt['v'], &header, NULL);
2644                 return (0);
2645         default:
2646                 (void) fprintf(stderr, "object %llu has non-file/directory "
2647                     "type %d\n", (u_longlong_t)obj, doi.doi_type);
2648                 break;
2649         }
2650
2651         return (EINVAL);
2652 }
2653
2654 /*
2655  * Dump the blocks for the object specified by path inside the dataset.
2656  */
2657 static int
2658 dump_path(char *ds, char *path)
2659 {
2660         int err;
2661         objset_t *os;
2662         uint64_t root_obj;
2663
2664         err = open_objset(ds, DMU_OST_ZFS, FTAG, &os);
2665         if (err != 0)
2666                 return (err);
2667
2668         err = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &root_obj);
2669         if (err != 0) {
2670                 (void) fprintf(stderr, "can't lookup root znode: %s\n",
2671                     strerror(err));
2672                 dmu_objset_disown(os, FTAG);
2673                 return (EINVAL);
2674         }
2675
2676         (void) snprintf(curpath, sizeof (curpath), "dataset=%s path=/", ds);
2677
2678         err = dump_path_impl(os, root_obj, path);
2679
2680         close_objset(os, FTAG);
2681         return (err);
2682 }
2683
2684 static int
2685 dump_label(const char *dev)
2686 {
2687         int fd;
2688         vdev_label_t label;
2689         char path[MAXPATHLEN];
2690         char *buf = label.vl_vdev_phys.vp_nvlist;
2691         size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2692         struct stat64 statbuf;
2693         uint64_t psize, ashift;
2694         boolean_t label_found = B_FALSE;
2695
2696         (void) strlcpy(path, dev, sizeof (path));
2697         if (dev[0] == '/') {
2698                 if (strncmp(dev, ZFS_DISK_ROOTD,
2699                     strlen(ZFS_DISK_ROOTD)) == 0) {
2700                         (void) snprintf(path, sizeof (path), "%s%s",
2701                             ZFS_RDISK_ROOTD, dev + strlen(ZFS_DISK_ROOTD));
2702                 }
2703         } else if (stat64(path, &statbuf) != 0) {
2704                 char *s;
2705
2706                 (void) snprintf(path, sizeof (path), "%s%s", ZFS_RDISK_ROOTD,
2707                     dev);
2708                 if (((s = strrchr(dev, 's')) == NULL &&
2709                     (s = strchr(dev, 'p')) == NULL) ||
2710                     !isdigit(*(s + 1)))
2711                         (void) strlcat(path, "s0", sizeof (path));
2712         }
2713
2714         if ((fd = open64(path, O_RDONLY)) < 0) {
2715                 (void) fprintf(stderr, "cannot open '%s': %s\n", path,
2716                     strerror(errno));
2717                 exit(1);
2718         }
2719
2720         if (fstat64(fd, &statbuf) != 0) {
2721                 (void) fprintf(stderr, "failed to stat '%s': %s\n", path,
2722                     strerror(errno));
2723                 (void) close(fd);
2724                 exit(1);
2725         }
2726
2727         if (S_ISBLK(statbuf.st_mode)) {
2728                 (void) fprintf(stderr,
2729                     "cannot use '%s': character device required\n", path);
2730                 (void) close(fd);
2731                 exit(1);
2732         }
2733
2734         psize = statbuf.st_size;
2735         psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2736
2737         for (int l = 0; l < VDEV_LABELS; l++) {
2738                 nvlist_t *config = NULL;
2739
2740                 if (!dump_opt['q']) {
2741                         (void) printf("------------------------------------\n");
2742                         (void) printf("LABEL %d\n", l);
2743                         (void) printf("------------------------------------\n");
2744                 }
2745
2746                 if (pread64(fd, &label, sizeof (label),
2747                     vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2748                         if (!dump_opt['q'])
2749                                 (void) printf("failed to read label %d\n", l);
2750                         continue;
2751                 }
2752
2753                 if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2754                         if (!dump_opt['q'])
2755                                 (void) printf("failed to unpack label %d\n", l);
2756                         ashift = SPA_MINBLOCKSHIFT;
2757                 } else {
2758                         nvlist_t *vdev_tree = NULL;
2759
2760                         if (!dump_opt['q'])
2761                                 dump_nvlist(config, 4);
2762                         if ((nvlist_lookup_nvlist(config,
2763                             ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2764                             (nvlist_lookup_uint64(vdev_tree,
2765                             ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2766                                 ashift = SPA_MINBLOCKSHIFT;
2767                         nvlist_free(config);
2768                         label_found = B_TRUE;
2769                 }
2770                 if (dump_opt['u'])
2771                         dump_label_uberblocks(&label, ashift);
2772         }
2773
2774         (void) close(fd);
2775
2776         return (label_found ? 0 : 2);
2777 }
2778
2779 static uint64_t dataset_feature_count[SPA_FEATURES];
2780 static uint64_t remap_deadlist_count = 0;
2781
2782 /*ARGSUSED*/
2783 static int
2784 dump_one_dir(const char *dsname, void *arg)
2785 {
2786         int error;
2787         objset_t *os;
2788
2789         error = open_objset(dsname, DMU_OST_ANY, FTAG, &os);
2790         if (error != 0)
2791                 return (0);
2792
2793         for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
2794                 if (!dmu_objset_ds(os)->ds_feature_inuse[f])
2795                         continue;
2796                 ASSERT(spa_feature_table[f].fi_flags &
2797                     ZFEATURE_FLAG_PER_DATASET);
2798                 dataset_feature_count[f]++;
2799         }
2800
2801         if (dsl_dataset_remap_deadlist_exists(dmu_objset_ds(os))) {
2802                 remap_deadlist_count++;
2803         }
2804
2805         dump_dir(os);
2806         close_objset(os, FTAG);
2807         fuid_table_destroy();
2808         return (0);
2809 }
2810
2811 /*
2812  * Block statistics.
2813  */
2814 #define PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2815 typedef struct zdb_blkstats {
2816         uint64_t zb_asize;
2817         uint64_t zb_lsize;
2818         uint64_t zb_psize;
2819         uint64_t zb_count;
2820         uint64_t zb_gangs;
2821         uint64_t zb_ditto_samevdev;
2822         uint64_t zb_ditto_same_ms;
2823         uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2824 } zdb_blkstats_t;
2825
2826 /*
2827  * Extended object types to report deferred frees and dedup auto-ditto blocks.
2828  */
2829 #define ZDB_OT_DEFERRED (DMU_OT_NUMTYPES + 0)
2830 #define ZDB_OT_DITTO    (DMU_OT_NUMTYPES + 1)
2831 #define ZDB_OT_OTHER    (DMU_OT_NUMTYPES + 2)
2832 #define ZDB_OT_TOTAL    (DMU_OT_NUMTYPES + 3)
2833
2834 static const char *zdb_ot_extname[] = {
2835         "deferred free",
2836         "dedup ditto",
2837         "other",
2838         "Total",
2839 };
2840
2841 #define ZB_TOTAL        DN_MAX_LEVELS
2842
2843 typedef struct zdb_cb {
2844         zdb_blkstats_t  zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2845         uint64_t        zcb_removing_size;
2846         uint64_t        zcb_checkpoint_size;
2847         uint64_t        zcb_dedup_asize;
2848         uint64_t        zcb_dedup_blocks;
2849         uint64_t        zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2850         uint64_t        zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2851             [BPE_PAYLOAD_SIZE];
2852         uint64_t        zcb_start;
2853         hrtime_t        zcb_lastprint;
2854         uint64_t        zcb_totalasize;
2855         uint64_t        zcb_errors[256];
2856         int             zcb_readfails;
2857         int             zcb_haderrors;
2858         spa_t           *zcb_spa;
2859         uint32_t        **zcb_vd_obsolete_counts;
2860 } zdb_cb_t;
2861
2862 /* test if two DVA offsets from same vdev are within the same metaslab */
2863 static boolean_t
2864 same_metaslab(spa_t *spa, uint64_t vdev, uint64_t off1, uint64_t off2)
2865 {
2866         vdev_t *vd = vdev_lookup_top(spa, vdev);
2867         uint64_t ms_shift = vd->vdev_ms_shift;
2868
2869         return ((off1 >> ms_shift) == (off2 >> ms_shift));
2870 }
2871
2872 static void
2873 zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2874     dmu_object_type_t type)
2875 {
2876         uint64_t refcnt = 0;
2877
2878         ASSERT(type < ZDB_OT_TOTAL);
2879
2880         if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2881                 return;
2882
2883         spa_config_enter(zcb->zcb_spa, SCL_CONFIG, FTAG, RW_READER);
2884
2885         for (int i = 0; i < 4; i++) {
2886                 int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2887                 int t = (i & 1) ? type : ZDB_OT_TOTAL;
2888                 int equal;
2889                 zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2890
2891                 zb->zb_asize += BP_GET_ASIZE(bp);
2892                 zb->zb_lsize += BP_GET_LSIZE(bp);
2893                 zb->zb_psize += BP_GET_PSIZE(bp);
2894                 zb->zb_count++;
2895
2896                 /*
2897                  * The histogram is only big enough to record blocks up to
2898                  * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2899                  * "other", bucket.
2900                  */
2901                 unsigned idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2902                 idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2903                 zb->zb_psize_histogram[idx]++;
2904
2905                 zb->zb_gangs += BP_COUNT_GANG(bp);
2906
2907                 switch (BP_GET_NDVAS(bp)) {
2908                 case 2:
2909                         if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2910                             DVA_GET_VDEV(&bp->blk_dva[1])) {
2911                                 zb->zb_ditto_samevdev++;
2912
2913                                 if (same_metaslab(zcb->zcb_spa,
2914                                     DVA_GET_VDEV(&bp->blk_dva[0]),
2915                                     DVA_GET_OFFSET(&bp->blk_dva[0]),
2916                                     DVA_GET_OFFSET(&bp->blk_dva[1])))
2917                                         zb->zb_ditto_same_ms++;
2918                         }
2919                         break;
2920                 case 3:
2921                         equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2922                             DVA_GET_VDEV(&bp->blk_dva[1])) +
2923                             (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2924                             DVA_GET_VDEV(&bp->blk_dva[2])) +
2925                             (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2926                             DVA_GET_VDEV(&bp->blk_dva[2]));
2927                         if (equal != 0) {
2928                                 zb->zb_ditto_samevdev++;
2929
2930                                 if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2931                                     DVA_GET_VDEV(&bp->blk_dva[1]) &&
2932                                     same_metaslab(zcb->zcb_spa,
2933                                     DVA_GET_VDEV(&bp->blk_dva[0]),
2934                                     DVA_GET_OFFSET(&bp->blk_dva[0]),
2935                                     DVA_GET_OFFSET(&bp->blk_dva[1])))
2936                                         zb->zb_ditto_same_ms++;
2937                                 else if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2938                                     DVA_GET_VDEV(&bp->blk_dva[2]) &&
2939                                     same_metaslab(zcb->zcb_spa,
2940                                     DVA_GET_VDEV(&bp->blk_dva[0]),
2941                                     DVA_GET_OFFSET(&bp->blk_dva[0]),
2942                                     DVA_GET_OFFSET(&bp->blk_dva[2])))
2943                                         zb->zb_ditto_same_ms++;
2944                                 else if (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2945                                     DVA_GET_VDEV(&bp->blk_dva[2]) &&
2946                                     same_metaslab(zcb->zcb_spa,
2947                                     DVA_GET_VDEV(&bp->blk_dva[1]),
2948                                     DVA_GET_OFFSET(&bp->blk_dva[1]),
2949                                     DVA_GET_OFFSET(&bp->blk_dva[2])))
2950                                         zb->zb_ditto_same_ms++;
2951                         }
2952                         break;
2953                 }
2954         }
2955
2956         spa_config_exit(zcb->zcb_spa, SCL_CONFIG, FTAG);
2957
2958         if (BP_IS_EMBEDDED(bp)) {
2959                 zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2960                 zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2961                     [BPE_GET_PSIZE(bp)]++;
2962                 return;
2963         }
2964
2965         if (dump_opt['L'])
2966                 return;
2967
2968         if (BP_GET_DEDUP(bp)) {
2969                 ddt_t *ddt;
2970                 ddt_entry_t *dde;
2971
2972                 ddt = ddt_select(zcb->zcb_spa, bp);
2973                 ddt_enter(ddt);
2974                 dde = ddt_lookup(ddt, bp, B_FALSE);
2975
2976                 if (dde == NULL) {
2977                         refcnt = 0;
2978                 } else {
2979                         ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2980                         ddt_phys_decref(ddp);
2981                         refcnt = ddp->ddp_refcnt;
2982                         if (ddt_phys_total_refcnt(dde) == 0)
2983                                 ddt_remove(ddt, dde);
2984                 }
2985                 ddt_exit(ddt);
2986         }
2987
2988         VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2989             refcnt ? 0 : spa_min_claim_txg(zcb->zcb_spa),
2990             bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2991 }
2992
2993 /* ARGSUSED */
2994 static void
2995 zdb_blkptr_done(zio_t *zio)
2996 {
2997         spa_t *spa = zio->io_spa;
2998         blkptr_t *bp = zio->io_bp;
2999         int ioerr = zio->io_error;
3000         zdb_cb_t *zcb = zio->io_private;
3001         zbookmark_phys_t *zb = &zio->io_bookmark;
3002
3003         abd_free(zio->io_abd);
3004
3005         mutex_enter(&spa->spa_scrub_lock);
3006         spa->spa_scrub_inflight--;
3007         spa->spa_load_verify_ios--;
3008         cv_broadcast(&spa->spa_scrub_io_cv);
3009
3010         if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
3011                 char blkbuf[BP_SPRINTF_LEN];
3012
3013                 zcb->zcb_haderrors = 1;
3014                 zcb->zcb_errors[ioerr]++;
3015
3016                 if (dump_opt['b'] >= 2)
3017                         snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3018                 else
3019                         blkbuf[0] = '\0';
3020
3021                 (void) printf("zdb_blkptr_cb: "
3022                     "Got error %d reading "
3023                     "<%llu, %llu, %lld, %llx> %s -- skipping\n",
3024                     ioerr,
3025                     (u_longlong_t)zb->zb_objset,
3026                     (u_longlong_t)zb->zb_object,
3027                     (u_longlong_t)zb->zb_level,
3028                     (u_longlong_t)zb->zb_blkid,
3029                     blkbuf);
3030         }
3031         mutex_exit(&spa->spa_scrub_lock);
3032 }
3033
3034 /* ARGSUSED */
3035 static int
3036 zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
3037     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
3038 {
3039         zdb_cb_t *zcb = arg;
3040         dmu_object_type_t type;
3041         boolean_t is_metadata;
3042
3043         if (bp == NULL)
3044                 return (0);
3045
3046         if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
3047                 char blkbuf[BP_SPRINTF_LEN];
3048                 snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3049                 (void) printf("objset %llu object %llu "
3050                     "level %lld offset 0x%llx %s\n",
3051                     (u_longlong_t)zb->zb_objset,
3052                     (u_longlong_t)zb->zb_object,
3053                     (longlong_t)zb->zb_level,
3054                     (u_longlong_t)blkid2offset(dnp, bp, zb),
3055                     blkbuf);
3056         }
3057
3058         if (BP_IS_HOLE(bp))
3059                 return (0);
3060
3061         type = BP_GET_TYPE(bp);
3062
3063         zdb_count_block(zcb, zilog, bp,
3064             (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
3065
3066         is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
3067
3068         if (!BP_IS_EMBEDDED(bp) &&
3069             (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
3070                 size_t size = BP_GET_PSIZE(bp);
3071                 abd_t *abd = abd_alloc(size, B_FALSE);
3072                 int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
3073
3074                 /* If it's an intent log block, failure is expected. */
3075                 if (zb->zb_level == ZB_ZIL_LEVEL)
3076                         flags |= ZIO_FLAG_SPECULATIVE;
3077
3078                 mutex_enter(&spa->spa_scrub_lock);
3079                 while (spa->spa_load_verify_ios > max_inflight)
3080                         cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
3081                 spa->spa_scrub_inflight++;
3082                 spa->spa_load_verify_ios++;
3083                 mutex_exit(&spa->spa_scrub_lock);
3084
3085                 zio_nowait(zio_read(NULL, spa, bp, abd, size,
3086                     zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
3087         }
3088
3089         zcb->zcb_readfails = 0;
3090
3091         /* only call gethrtime() every 100 blocks */
3092         static int iters;
3093         if (++iters > 100)
3094                 iters = 0;
3095         else
3096                 return (0);
3097
3098         if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
3099                 uint64_t now = gethrtime();
3100                 char buf[10];
3101                 uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
3102                 int kb_per_sec =
3103                     1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
3104                 int sec_remaining =
3105                     (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
3106
3107                 /* make sure nicenum has enough space */
3108                 CTASSERT(sizeof (buf) >= NN_NUMBUF_SZ);
3109
3110                 zfs_nicenum(bytes, buf, sizeof (buf));
3111                 (void) fprintf(stderr,
3112                     "\r%5s completed (%4dMB/s) "
3113                     "estimated time remaining: %uhr %02umin %02usec        ",
3114                     buf, kb_per_sec / 1024,
3115                     sec_remaining / 60 / 60,
3116                     sec_remaining / 60 % 60,
3117                     sec_remaining % 60);
3118
3119                 zcb->zcb_lastprint = now;
3120         }
3121
3122         return (0);
3123 }
3124
3125 static void
3126 zdb_leak(void *arg, uint64_t start, uint64_t size)
3127 {
3128         vdev_t *vd = arg;
3129
3130         (void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
3131             (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
3132 }
3133
3134 static metaslab_ops_t zdb_metaslab_ops = {
3135         NULL    /* alloc */
3136 };
3137
3138 static void
3139 zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
3140 {
3141         ddt_bookmark_t ddb;
3142         ddt_entry_t dde;
3143         int error;
3144
3145         ASSERT(!dump_opt['L']);
3146
3147         bzero(&ddb, sizeof (ddb));
3148         while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
3149                 blkptr_t blk;
3150                 ddt_phys_t *ddp = dde.dde_phys;
3151
3152                 if (ddb.ddb_class == DDT_CLASS_UNIQUE)
3153                         return;
3154
3155                 ASSERT(ddt_phys_total_refcnt(&dde) > 1);
3156
3157                 for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
3158                         if (ddp->ddp_phys_birth == 0)
3159                                 continue;
3160                         ddt_bp_create(ddb.ddb_checksum,
3161                             &dde.dde_key, ddp, &blk);
3162                         if (p == DDT_PHYS_DITTO) {
3163                                 zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
3164                         } else {
3165                                 zcb->zcb_dedup_asize +=
3166                                     BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
3167                                 zcb->zcb_dedup_blocks++;
3168                         }
3169                 }
3170                 ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
3171                 ddt_enter(ddt);
3172                 VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
3173                 ddt_exit(ddt);
3174         }
3175
3176         ASSERT(error == ENOENT);
3177 }
3178
3179 /* ARGSUSED */
3180 static void
3181 claim_segment_impl_cb(uint64_t inner_offset, vdev_t *vd, uint64_t offset,
3182     uint64_t size, void *arg)
3183 {
3184         /*
3185          * This callback was called through a remap from
3186          * a device being removed. Therefore, the vdev that
3187          * this callback is applied to is a concrete
3188          * vdev.
3189          */
3190         ASSERT(vdev_is_concrete(vd));
3191
3192         VERIFY0(metaslab_claim_impl(vd, offset, size,
3193             spa_min_claim_txg(vd->vdev_spa)));
3194 }
3195
3196 static void
3197 claim_segment_cb(void *arg, uint64_t offset, uint64_t size)
3198 {
3199         vdev_t *vd = arg;
3200
3201         vdev_indirect_ops.vdev_op_remap(vd, offset, size,
3202             claim_segment_impl_cb, NULL);
3203 }
3204
3205 /*
3206  * After accounting for all allocated blocks that are directly referenced,
3207  * we might have missed a reference to a block from a partially complete
3208  * (and thus unused) indirect mapping object. We perform a secondary pass
3209  * through the metaslabs we have already mapped and claim the destination
3210  * blocks.
3211  */
3212 static void
3213 zdb_claim_removing(spa_t *spa, zdb_cb_t *zcb)
3214 {
3215         if (dump_opt['L'])
3216                 return;
3217
3218         if (spa->spa_vdev_removal == NULL)
3219                 return;
3220
3221         spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3222
3223         spa_vdev_removal_t *svr = spa->spa_vdev_removal;
3224         vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id);
3225         vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3226
3227         for (uint64_t msi = 0; msi < vd->vdev_ms_count; msi++) {
3228                 metaslab_t *msp = vd->vdev_ms[msi];
3229
3230                 if (msp->ms_start >= vdev_indirect_mapping_max_offset(vim))
3231                         break;
3232
3233                 ASSERT0(range_tree_space(svr->svr_allocd_segs));
3234
3235                 if (msp->ms_sm != NULL) {
3236                         VERIFY0(space_map_load(msp->ms_sm,
3237                             svr->svr_allocd_segs, SM_ALLOC));
3238
3239                         /*
3240                          * Clear everything past what has been synced unless
3241                          * it's past the spacemap, because we have not allocated
3242                          * mappings for it yet.
3243                          */
3244                         uint64_t vim_max_offset =
3245                             vdev_indirect_mapping_max_offset(vim);
3246                         uint64_t sm_end = msp->ms_sm->sm_start +
3247                             msp->ms_sm->sm_size;
3248                         if (sm_end > vim_max_offset)
3249                                 range_tree_clear(svr->svr_allocd_segs,
3250                                     vim_max_offset, sm_end - vim_max_offset);
3251                 }
3252
3253                 zcb->zcb_removing_size +=
3254                     range_tree_space(svr->svr_allocd_segs);
3255                 range_tree_vacate(svr->svr_allocd_segs, claim_segment_cb, vd);
3256         }
3257
3258         spa_config_exit(spa, SCL_CONFIG, FTAG);
3259 }
3260
3261 /* ARGSUSED */
3262 static int
3263 increment_indirect_mapping_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3264 {
3265         zdb_cb_t *zcb = arg;
3266         spa_t *spa = zcb->zcb_spa;
3267         vdev_t *vd;
3268         const dva_t *dva = &bp->blk_dva[0];
3269
3270         ASSERT(!dump_opt['L']);
3271         ASSERT3U(BP_GET_NDVAS(bp), ==, 1);
3272
3273         spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
3274         vd = vdev_lookup_top(zcb->zcb_spa, DVA_GET_VDEV(dva));
3275         ASSERT3P(vd, !=, NULL);
3276         spa_config_exit(spa, SCL_VDEV, FTAG);
3277
3278         ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0);
3279         ASSERT3P(zcb->zcb_vd_obsolete_counts[vd->vdev_id], !=, NULL);
3280
3281         vdev_indirect_mapping_increment_obsolete_count(
3282             vd->vdev_indirect_mapping,
3283             DVA_GET_OFFSET(dva), DVA_GET_ASIZE(dva),
3284             zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3285
3286         return (0);
3287 }
3288
3289 static uint32_t *
3290 zdb_load_obsolete_counts(vdev_t *vd)
3291 {
3292         vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3293         spa_t *spa = vd->vdev_spa;
3294         spa_condensing_indirect_phys_t *scip =
3295             &spa->spa_condensing_indirect_phys;
3296         uint32_t *counts;
3297
3298         EQUIV(vdev_obsolete_sm_object(vd) != 0, vd->vdev_obsolete_sm != NULL);
3299         counts = vdev_indirect_mapping_load_obsolete_counts(vim);
3300         if (vd->vdev_obsolete_sm != NULL) {
3301                 vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3302                     vd->vdev_obsolete_sm);
3303         }
3304         if (scip->scip_vdev == vd->vdev_id &&
3305             scip->scip_prev_obsolete_sm_object != 0) {
3306                 space_map_t *prev_obsolete_sm = NULL;
3307                 VERIFY0(space_map_open(&prev_obsolete_sm, spa->spa_meta_objset,
3308                     scip->scip_prev_obsolete_sm_object, 0, vd->vdev_asize, 0));
3309                 vdev_indirect_mapping_load_obsolete_spacemap(vim, counts,
3310                     prev_obsolete_sm);
3311                 space_map_close(prev_obsolete_sm);
3312         }
3313         return (counts);
3314 }
3315
3316 typedef struct checkpoint_sm_exclude_entry_arg {
3317         vdev_t *cseea_vd;
3318         uint64_t cseea_checkpoint_size;
3319 } checkpoint_sm_exclude_entry_arg_t;
3320
3321 static int
3322 checkpoint_sm_exclude_entry_cb(space_map_entry_t *sme, void *arg)
3323 {
3324         checkpoint_sm_exclude_entry_arg_t *cseea = arg;
3325         vdev_t *vd = cseea->cseea_vd;
3326         metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
3327         uint64_t end = sme->sme_offset + sme->sme_run;
3328
3329         ASSERT(sme->sme_type == SM_FREE);
3330
3331         /*
3332          * Since the vdev_checkpoint_sm exists in the vdev level
3333          * and the ms_sm space maps exist in the metaslab level,
3334          * an entry in the checkpoint space map could theoretically
3335          * cross the boundaries of the metaslab that it belongs.
3336          *
3337          * In reality, because of the way that we populate and
3338          * manipulate the checkpoint's space maps currently,
3339          * there shouldn't be any entries that cross metaslabs.
3340          * Hence the assertion below.
3341          *
3342          * That said, there is no fundamental requirement that
3343          * the checkpoint's space map entries should not cross
3344          * metaslab boundaries. So if needed we could add code
3345          * that handles metaslab-crossing segments in the future.
3346          */
3347         VERIFY3U(sme->sme_offset, >=, ms->ms_start);
3348         VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
3349
3350         /*
3351          * By removing the entry from the allocated segments we
3352          * also verify that the entry is there to begin with.
3353          */
3354         mutex_enter(&ms->ms_lock);
3355         range_tree_remove(ms->ms_allocatable, sme->sme_offset, sme->sme_run);
3356         mutex_exit(&ms->ms_lock);
3357
3358         cseea->cseea_checkpoint_size += sme->sme_run;
3359         return (0);
3360 }
3361
3362 static void
3363 zdb_leak_init_vdev_exclude_checkpoint(vdev_t *vd, zdb_cb_t *zcb)
3364 {
3365         spa_t *spa = vd->vdev_spa;
3366         space_map_t *checkpoint_sm = NULL;
3367         uint64_t checkpoint_sm_obj;
3368
3369         /*
3370          * If there is no vdev_top_zap, we are in a pool whose
3371          * version predates the pool checkpoint feature.
3372          */
3373         if (vd->vdev_top_zap == 0)
3374                 return;
3375
3376         /*
3377          * If there is no reference of the vdev_checkpoint_sm in
3378          * the vdev_top_zap, then one of the following scenarios
3379          * is true:
3380          *
3381          * 1] There is no checkpoint
3382          * 2] There is a checkpoint, but no checkpointed blocks
3383          *    have been freed yet
3384          * 3] The current vdev is indirect
3385          *
3386          * In these cases we return immediately.
3387          */
3388         if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
3389             VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
3390                 return;
3391
3392         VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
3393             VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1,
3394             &checkpoint_sm_obj));
3395
3396         checkpoint_sm_exclude_entry_arg_t cseea;
3397         cseea.cseea_vd = vd;
3398         cseea.cseea_checkpoint_size = 0;
3399
3400         VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
3401             checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
3402
3403         VERIFY0(space_map_iterate(checkpoint_sm,
3404             space_map_length(checkpoint_sm),
3405             checkpoint_sm_exclude_entry_cb, &cseea));
3406         space_map_close(checkpoint_sm);
3407
3408         zcb->zcb_checkpoint_size += cseea.cseea_checkpoint_size;
3409 }
3410
3411 static void
3412 zdb_leak_init_exclude_checkpoint(spa_t *spa, zdb_cb_t *zcb)
3413 {
3414         ASSERT(!dump_opt['L']);
3415
3416         vdev_t *rvd = spa->spa_root_vdev;
3417         for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3418                 ASSERT3U(c, ==, rvd->vdev_child[c]->vdev_id);
3419                 zdb_leak_init_vdev_exclude_checkpoint(rvd->vdev_child[c], zcb);
3420         }
3421 }
3422
3423 static void
3424 load_concrete_ms_allocatable_trees(spa_t *spa, maptype_t maptype)
3425 {
3426         vdev_t *rvd = spa->spa_root_vdev;
3427         for (uint64_t i = 0; i < rvd->vdev_children; i++) {
3428                 vdev_t *vd = rvd->vdev_child[i];
3429
3430                 ASSERT3U(i, ==, vd->vdev_id);
3431
3432                 if (vd->vdev_ops == &vdev_indirect_ops)
3433                         continue;
3434
3435                 for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3436                         metaslab_t *msp = vd->vdev_ms[m];
3437
3438                         (void) fprintf(stderr,
3439                             "\rloading concrete vdev %llu, "
3440                             "metaslab %llu of %llu ...",
3441                             (longlong_t)vd->vdev_id,
3442                             (longlong_t)msp->ms_id,
3443                             (longlong_t)vd->vdev_ms_count);
3444
3445                         mutex_enter(&msp->ms_lock);
3446                         metaslab_unload(msp);
3447
3448                         /*
3449                          * We don't want to spend the CPU manipulating the
3450                          * size-ordered tree, so clear the range_tree ops.
3451                          */
3452                         msp->ms_allocatable->rt_ops = NULL;
3453
3454                         if (msp->ms_sm != NULL) {
3455                                 VERIFY0(space_map_load(msp->ms_sm,
3456                                     msp->ms_allocatable, maptype));
3457                         }
3458                         if (!msp->ms_loaded)
3459                                 msp->ms_loaded = B_TRUE;
3460                         mutex_exit(&msp->ms_lock);
3461                 }
3462         }
3463 }
3464
3465 /*
3466  * vm_idxp is an in-out parameter which (for indirect vdevs) is the
3467  * index in vim_entries that has the first entry in this metaslab.
3468  * On return, it will be set to the first entry after this metaslab.
3469  */
3470 static void
3471 load_indirect_ms_allocatable_tree(vdev_t *vd, metaslab_t *msp,
3472     uint64_t *vim_idxp)
3473 {
3474         vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3475
3476         mutex_enter(&msp->ms_lock);
3477         metaslab_unload(msp);
3478
3479         /*
3480          * We don't want to spend the CPU manipulating the
3481          * size-ordered tree, so clear the range_tree ops.
3482          */
3483         msp->ms_allocatable->rt_ops = NULL;
3484
3485         for (; *vim_idxp < vdev_indirect_mapping_num_entries(vim);
3486             (*vim_idxp)++) {
3487                 vdev_indirect_mapping_entry_phys_t *vimep =
3488                     &vim->vim_entries[*vim_idxp];
3489                 uint64_t ent_offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3490                 uint64_t ent_len = DVA_GET_ASIZE(&vimep->vimep_dst);
3491                 ASSERT3U(ent_offset, >=, msp->ms_start);
3492                 if (ent_offset >= msp->ms_start + msp->ms_size)
3493                         break;
3494
3495                 /*
3496                  * Mappings do not cross metaslab boundaries,
3497                  * because we create them by walking the metaslabs.
3498                  */
3499                 ASSERT3U(ent_offset + ent_len, <=,
3500                     msp->ms_start + msp->ms_size);
3501                 range_tree_add(msp->ms_allocatable, ent_offset, ent_len);
3502         }
3503
3504         if (!msp->ms_loaded)
3505                 msp->ms_loaded = B_TRUE;
3506         mutex_exit(&msp->ms_lock);
3507 }
3508
3509 static void
3510 zdb_leak_init_prepare_indirect_vdevs(spa_t *spa, zdb_cb_t *zcb)
3511 {
3512         ASSERT(!dump_opt['L']);
3513
3514         vdev_t *rvd = spa->spa_root_vdev;
3515         for (uint64_t c = 0; c < rvd->vdev_children; c++) {
3516                 vdev_t *vd = rvd->vdev_child[c];
3517
3518                 ASSERT3U(c, ==, vd->vdev_id);
3519
3520                 if (vd->vdev_ops != &vdev_indirect_ops)
3521                         continue;
3522
3523                 /*
3524                  * Note: we don't check for mapping leaks on
3525                  * removing vdevs because their ms_allocatable's
3526                  * are used to look for leaks in allocated space.
3527                  */
3528                 zcb->zcb_vd_obsolete_counts[c] = zdb_load_obsolete_counts(vd);
3529
3530                 /*
3531                  * Normally, indirect vdevs don't have any
3532                  * metaslabs.  We want to set them up for
3533                  * zio_claim().
3534                  */
3535                 VERIFY0(vdev_metaslab_init(vd, 0));
3536
3537                 vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3538                 uint64_t vim_idx = 0;
3539                 for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3540
3541                         (void) fprintf(stderr,
3542                             "\rloading indirect vdev %llu, "
3543                             "metaslab %llu of %llu ...",
3544                             (longlong_t)vd->vdev_id,
3545                             (longlong_t)vd->vdev_ms[m]->ms_id,
3546                             (longlong_t)vd->vdev_ms_count);
3547
3548                         load_indirect_ms_allocatable_tree(vd, vd->vdev_ms[m],
3549                             &vim_idx);
3550                 }
3551                 ASSERT3U(vim_idx, ==, vdev_indirect_mapping_num_entries(vim));
3552         }
3553 }
3554
3555 static void
3556 zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
3557 {
3558         zcb->zcb_spa = spa;
3559
3560         if (dump_opt['L'])
3561                 return;
3562
3563         dsl_pool_t *dp = spa->spa_dsl_pool;
3564         vdev_t *rvd = spa->spa_root_vdev;
3565
3566         /*
3567          * We are going to be changing the meaning of the metaslab's
3568          * ms_allocatable.  Ensure that the allocator doesn't try to
3569          * use the tree.
3570          */
3571         spa->spa_normal_class->mc_ops = &zdb_metaslab_ops;
3572         spa->spa_log_class->mc_ops = &zdb_metaslab_ops;
3573
3574         zcb->zcb_vd_obsolete_counts =
3575             umem_zalloc(rvd->vdev_children * sizeof (uint32_t *),
3576             UMEM_NOFAIL);
3577
3578         /*
3579          * For leak detection, we overload the ms_allocatable trees
3580          * to contain allocated segments instead of free segments.
3581          * As a result, we can't use the normal metaslab_load/unload
3582          * interfaces.
3583          */
3584         zdb_leak_init_prepare_indirect_vdevs(spa, zcb);
3585         load_concrete_ms_allocatable_trees(spa, SM_ALLOC);
3586
3587         /*
3588          * On load_concrete_ms_allocatable_trees() we loaded all the
3589          * allocated entries from the ms_sm to the ms_allocatable for
3590          * each metaslab. If the pool has a checkpoint or is in the
3591          * middle of discarding a checkpoint, some of these blocks
3592          * may have been freed but their ms_sm may not have been
3593          * updated because they are referenced by the checkpoint. In
3594          * order to avoid false-positives during leak-detection, we
3595          * go through the vdev's checkpoint space map and exclude all
3596          * its entries from their relevant ms_allocatable.
3597          *
3598          * We also aggregate the space held by the checkpoint and add
3599          * it to zcb_checkpoint_size.
3600          *
3601          * Note that at this point we are also verifying that all the
3602          * entries on the checkpoint_sm are marked as allocated in
3603          * the ms_sm of their relevant metaslab.
3604          * [see comment in checkpoint_sm_exclude_entry_cb()]
3605          */
3606         zdb_leak_init_exclude_checkpoint(spa, zcb);
3607         ASSERT3U(zcb->zcb_checkpoint_size, ==, spa_get_checkpoint_space(spa));
3608
3609         /* for cleaner progress output */
3610         (void) fprintf(stderr, "\n");
3611
3612         if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
3613                 ASSERT(spa_feature_is_enabled(spa,
3614                     SPA_FEATURE_DEVICE_REMOVAL));
3615                 (void) bpobj_iterate_nofree(&dp->dp_obsolete_bpobj,
3616                     increment_indirect_mapping_cb, zcb, NULL);
3617         }
3618
3619         spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3620         zdb_ddt_leak_init(spa, zcb);
3621         spa_config_exit(spa, SCL_CONFIG, FTAG);
3622 }
3623
3624 static boolean_t
3625 zdb_check_for_obsolete_leaks(vdev_t *vd, zdb_cb_t *zcb)
3626 {
3627         boolean_t leaks = B_FALSE;
3628         vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3629         uint64_t total_leaked = 0;
3630
3631         ASSERT(vim != NULL);
3632
3633         for (uint64_t i = 0; i < vdev_indirect_mapping_num_entries(vim); i++) {
3634                 vdev_indirect_mapping_entry_phys_t *vimep =
3635                     &vim->vim_entries[i];
3636                 uint64_t obsolete_bytes = 0;
3637                 uint64_t offset = DVA_MAPPING_GET_SRC_OFFSET(vimep);
3638                 metaslab_t *msp = vd->vdev_ms[offset >> vd->vdev_ms_shift];
3639
3640                 /*
3641                  * This is not very efficient but it's easy to
3642                  * verify correctness.
3643                  */
3644                 for (uint64_t inner_offset = 0;
3645                     inner_offset < DVA_GET_ASIZE(&vimep->vimep_dst);
3646                     inner_offset += 1 << vd->vdev_ashift) {
3647                         if (range_tree_contains(msp->ms_allocatable,
3648                             offset + inner_offset, 1 << vd->vdev_ashift)) {
3649                                 obsolete_bytes += 1 << vd->vdev_ashift;
3650                         }
3651                 }
3652
3653                 int64_t bytes_leaked = obsolete_bytes -
3654                     zcb->zcb_vd_obsolete_counts[vd->vdev_id][i];
3655                 ASSERT3U(DVA_GET_ASIZE(&vimep->vimep_dst), >=,
3656                     zcb->zcb_vd_obsolete_counts[vd->vdev_id][i]);
3657                 if (bytes_leaked != 0 &&
3658                     (vdev_obsolete_counts_are_precise(vd) ||
3659                     dump_opt['d'] >= 5)) {
3660                         (void) printf("obsolete indirect mapping count "
3661                             "mismatch on %llu:%llx:%llx : %llx bytes leaked\n",
3662                             (u_longlong_t)vd->vdev_id,
3663                             (u_longlong_t)DVA_MAPPING_GET_SRC_OFFSET(vimep),
3664                             (u_longlong_t)DVA_GET_ASIZE(&vimep->vimep_dst),
3665                             (u_longlong_t)bytes_leaked);
3666                 }
3667                 total_leaked += ABS(bytes_leaked);
3668         }
3669
3670         if (!vdev_obsolete_counts_are_precise(vd) && total_leaked > 0) {
3671                 int pct_leaked = total_leaked * 100 /
3672                     vdev_indirect_mapping_bytes_mapped(vim);
3673                 (void) printf("cannot verify obsolete indirect mapping "
3674                     "counts of vdev %llu because precise feature was not "
3675                     "enabled when it was removed: %d%% (%llx bytes) of mapping"
3676                     "unreferenced\n",
3677                     (u_longlong_t)vd->vdev_id, pct_leaked,
3678                     (u_longlong_t)total_leaked);
3679         } else if (total_leaked > 0) {
3680                 (void) printf("obsolete indirect mapping count mismatch "
3681                     "for vdev %llu -- %llx total bytes mismatched\n",
3682                     (u_longlong_t)vd->vdev_id,
3683                     (u_longlong_t)total_leaked);
3684                 leaks |= B_TRUE;
3685         }
3686
3687         vdev_indirect_mapping_free_obsolete_counts(vim,
3688             zcb->zcb_vd_obsolete_counts[vd->vdev_id]);
3689         zcb->zcb_vd_obsolete_counts[vd->vdev_id] = NULL;
3690
3691         return (leaks);
3692 }
3693
3694 static boolean_t
3695 zdb_leak_fini(spa_t *spa, zdb_cb_t *zcb)
3696 {
3697         if (dump_opt['L'])
3698                 return (B_FALSE);
3699
3700         boolean_t leaks = B_FALSE;
3701
3702         vdev_t *rvd = spa->spa_root_vdev;
3703         for (unsigned c = 0; c < rvd->vdev_children; c++) {
3704                 vdev_t *vd = rvd->vdev_child[c];
3705 #if DEBUG
3706                 metaslab_group_t *mg = vd->vdev_mg;
3707 #endif
3708
3709                 if (zcb->zcb_vd_obsolete_counts[c] != NULL) {
3710                         leaks |= zdb_check_for_obsolete_leaks(vd, zcb);
3711                 }
3712
3713                 for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
3714                         metaslab_t *msp = vd->vdev_ms[m];
3715                         ASSERT3P(mg, ==, msp->ms_group);
3716
3717                         /*
3718                          * ms_allocatable has been overloaded
3719                          * to contain allocated segments. Now that
3720                          * we finished traversing all blocks, any
3721                          * block that remains in the ms_allocatable
3722                          * represents an allocated block that we
3723                          * did not claim during the traversal.
3724                          * Claimed blocks would have been removed
3725                          * from the ms_allocatable.  For indirect
3726                          * vdevs, space remaining in the tree
3727                          * represents parts of the mapping that are
3728                          * not referenced, which is not a bug.
3729                          */
3730                         if (vd->vdev_ops == &vdev_indirect_ops) {
3731                                 range_tree_vacate(msp->ms_allocatable,
3732                                     NULL, NULL);
3733                         } else {
3734                                 range_tree_vacate(msp->ms_allocatable,
3735                                     zdb_leak, vd);
3736                         }
3737
3738                         if (msp->ms_loaded) {
3739                                 msp->ms_loaded = B_FALSE;
3740                         }
3741                 }
3742
3743         }
3744
3745         umem_free(zcb->zcb_vd_obsolete_counts,
3746             rvd->vdev_children * sizeof (uint32_t *));
3747         zcb->zcb_vd_obsolete_counts = NULL;
3748
3749         return (leaks);
3750 }
3751
3752 /* ARGSUSED */
3753 static int
3754 count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
3755 {
3756         zdb_cb_t *zcb = arg;
3757
3758         if (dump_opt['b'] >= 5) {
3759                 char blkbuf[BP_SPRINTF_LEN];
3760                 snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3761                 (void) printf("[%s] %s\n",
3762                     "deferred free", blkbuf);
3763         }
3764         zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
3765         return (0);
3766 }
3767
3768 static int
3769 dump_block_stats(spa_t *spa)
3770 {
3771         zdb_cb_t zcb;
3772         zdb_blkstats_t *zb, *tzb;
3773         uint64_t norm_alloc, norm_space, total_alloc, total_found;
3774         int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
3775         boolean_t leaks = B_FALSE;
3776         int err;
3777
3778         bzero(&zcb, sizeof (zcb));
3779         (void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
3780             (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
3781             (dump_opt['c'] == 1) ? "metadata " : "",
3782             dump_opt['c'] ? "checksums " : "",
3783             (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
3784             !dump_opt['L'] ? "nothing leaked " : "");
3785
3786         /*
3787          * When leak detection is enabled we load all space maps as SM_ALLOC
3788          * maps, then traverse the pool claiming each block we discover. If
3789          * the pool is perfectly consistent, the segment trees will be empty
3790          * when we're done. Anything left over is a leak; any block we can't
3791          * claim (because it's not part of any space map) is a double
3792          * allocation, reference to a freed block, or an unclaimed log block.
3793          *
3794          * When leak detection is disabled (-L option) we still traverse the
3795          * pool claiming each block we discover, but we skip opening any space
3796          * maps.
3797          */
3798         bzero(&zcb, sizeof (zdb_cb_t));
3799         zdb_leak_init(spa, &zcb);
3800
3801         /*
3802          * If there's a deferred-free bplist, process that first.
3803          */
3804         (void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
3805             count_block_cb, &zcb, NULL);
3806
3807         if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
3808                 (void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
3809                     count_block_cb, &zcb, NULL);
3810         }
3811
3812         zdb_claim_removing(spa, &zcb);
3813
3814         if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
3815                 VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
3816                     spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
3817                     &zcb, NULL));
3818         }
3819
3820         if (dump_opt['c'] > 1)
3821                 flags |= TRAVERSE_PREFETCH_DATA;
3822
3823         zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
3824         zcb.zcb_totalasize += metaslab_class_get_alloc(spa_special_class(spa));
3825         zcb.zcb_totalasize += metaslab_class_get_alloc(spa_dedup_class(spa));
3826         zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
3827         err = traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
3828
3829         /*
3830          * If we've traversed the data blocks then we need to wait for those
3831          * I/Os to complete. We leverage "The Godfather" zio to wait on
3832          * all async I/Os to complete.
3833          */
3834         if (dump_opt['c']) {
3835                 for (int i = 0; i < max_ncpus; i++) {
3836                         (void) zio_wait(spa->spa_async_zio_root[i]);
3837                         spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
3838                             ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
3839                             ZIO_FLAG_GODFATHER);
3840                 }
3841         }
3842
3843         /*
3844          * Done after zio_wait() since zcb_haderrors is modified in
3845          * zdb_blkptr_done()
3846          */
3847         zcb.zcb_haderrors |= err;
3848
3849         if (zcb.zcb_haderrors) {
3850                 (void) printf("\nError counts:\n\n");
3851                 (void) printf("\t%5s  %s\n", "errno", "count");
3852                 for (int e = 0; e < 256; e++) {
3853                         if (zcb.zcb_errors[e] != 0) {
3854                                 (void) printf("\t%5d  %llu\n",
3855                                     e, (u_longlong_t)zcb.zcb_errors[e]);
3856                         }
3857                 }
3858         }
3859
3860         /*
3861          * Report any leaked segments.
3862          */
3863         leaks |= zdb_leak_fini(spa, &zcb);
3864
3865         tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
3866
3867         norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
3868         norm_space = metaslab_class_get_space(spa_normal_class(spa));
3869
3870         total_alloc = norm_alloc +
3871             metaslab_class_get_alloc(spa_log_class(spa)) +
3872             metaslab_class_get_alloc(spa_special_class(spa)) +
3873             metaslab_class_get_alloc(spa_dedup_class(spa));
3874         total_found = tzb->zb_asize - zcb.zcb_dedup_asize +
3875             zcb.zcb_removing_size + zcb.zcb_checkpoint_size;
3876
3877         if (total_found == total_alloc && !dump_opt['L']) {
3878                 (void) printf("\n\tNo leaks (block sum matches space"
3879                     " maps exactly)\n");
3880         } else if (!dump_opt['L']) {
3881                 (void) printf("block traversal size %llu != alloc %llu "
3882                     "(%s %lld)\n",
3883                     (u_longlong_t)total_found,
3884                     (u_longlong_t)total_alloc,
3885                     (dump_opt['L']) ? "unreachable" : "leaked",
3886                     (longlong_t)(total_alloc - total_found));
3887                 leaks = B_TRUE;
3888         }
3889
3890         if (tzb->zb_count == 0)
3891                 return (2);
3892
3893         (void) printf("\n");
3894         (void) printf("\t%-16s %14llu\n", "bp count:",
3895             (u_longlong_t)tzb->zb_count);
3896         (void) printf("\t%-16s %14llu\n", "ganged count:",
3897             (longlong_t)tzb->zb_gangs);
3898         (void) printf("\t%-16s %14llu      avg: %6llu\n", "bp logical:",
3899             (u_longlong_t)tzb->zb_lsize,
3900             (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
3901         (void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
3902             "bp physical:", (u_longlong_t)tzb->zb_psize,
3903             (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
3904             (double)tzb->zb_lsize / tzb->zb_psize);
3905         (void) printf("\t%-16s %14llu      avg: %6llu     compression: %6.2f\n",
3906             "bp allocated:", (u_longlong_t)tzb->zb_asize,
3907             (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
3908             (double)tzb->zb_lsize / tzb->zb_asize);
3909         (void) printf("\t%-16s %14llu    ref>1: %6llu   deduplication: %6.2f\n",
3910             "bp deduped:", (u_longlong_t)zcb.zcb_dedup_asize,
3911             (u_longlong_t)zcb.zcb_dedup_blocks,
3912             (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
3913         (void) printf("\t%-16s %14llu     used: %5.2f%%\n", "Normal class:",
3914             (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
3915
3916         if (spa_special_class(spa)->mc_rotor != NULL) {
3917                 uint64_t alloc = metaslab_class_get_alloc(
3918                     spa_special_class(spa));
3919                 uint64_t space = metaslab_class_get_space(
3920                     spa_special_class(spa));
3921
3922                 (void) printf("\t%-16s %14llu     used: %5.2f%%\n",
3923                     "Special class", (u_longlong_t)alloc,
3924                     100.0 * alloc / space);
3925         }
3926
3927         if (spa_dedup_class(spa)->mc_rotor != NULL) {
3928                 uint64_t alloc = metaslab_class_get_alloc(
3929                     spa_dedup_class(spa));
3930                 uint64_t space = metaslab_class_get_space(
3931                     spa_dedup_class(spa));
3932
3933                 (void) printf("\t%-16s %14llu     used: %5.2f%%\n",
3934                     "Dedup class", (u_longlong_t)alloc,
3935                     100.0 * alloc / space);
3936         }
3937
3938         for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
3939                 if (zcb.zcb_embedded_blocks[i] == 0)
3940                         continue;
3941                 (void) printf("\n");
3942                 (void) printf("\tadditional, non-pointer bps of type %u: "
3943                     "%10llu\n",
3944                     i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
3945
3946                 if (dump_opt['b'] >= 3) {
3947                         (void) printf("\t number of (compressed) bytes:  "
3948                             "number of bps\n");
3949                         dump_histogram(zcb.zcb_embedded_histogram[i],
3950                             sizeof (zcb.zcb_embedded_histogram[i]) /
3951                             sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
3952                 }
3953         }
3954
3955         if (tzb->zb_ditto_samevdev != 0) {
3956                 (void) printf("\tDittoed blocks on same vdev: %llu\n",
3957                     (longlong_t)tzb->zb_ditto_samevdev);
3958         }
3959         if (tzb->zb_ditto_same_ms != 0) {
3960                 (void) printf("\tDittoed blocks in same metaslab: %llu\n",
3961                     (longlong_t)tzb->zb_ditto_same_ms);
3962         }
3963
3964         for (uint64_t v = 0; v < spa->spa_root_vdev->vdev_children; v++) {
3965                 vdev_t *vd = spa->spa_root_vdev->vdev_child[v];
3966                 vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping;
3967
3968                 if (vim == NULL) {
3969                         continue;
3970                 }
3971
3972                 char mem[32];
3973                 zdb_nicenum(vdev_indirect_mapping_num_entries(vim),
3974                     mem, vdev_indirect_mapping_size(vim));
3975
3976                 (void) printf("\tindirect vdev id %llu has %llu segments "
3977                     "(%s in memory)\n",
3978                     (longlong_t)vd->vdev_id,
3979                     (longlong_t)vdev_indirect_mapping_num_entries(vim), mem);
3980         }
3981
3982         if (dump_opt['b'] >= 2) {
3983                 int l, t, level;
3984                 (void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
3985                     "\t  avg\t comp\t%%Total\tType\n");
3986
3987                 for (t = 0; t <= ZDB_OT_TOTAL; t++) {
3988                         char csize[32], lsize[32], psize[32], asize[32];
3989                         char avg[32], gang[32];
3990                         const char *typename;
3991
3992                         /* make sure nicenum has enough space */
3993                         CTASSERT(sizeof (csize) >= NN_NUMBUF_SZ);
3994                         CTASSERT(sizeof (lsize) >= NN_NUMBUF_SZ);
3995                         CTASSERT(sizeof (psize) >= NN_NUMBUF_SZ);
3996                         CTASSERT(sizeof (asize) >= NN_NUMBUF_SZ);
3997                         CTASSERT(sizeof (avg) >= NN_NUMBUF_SZ);
3998                         CTASSERT(sizeof (gang) >= NN_NUMBUF_SZ);
3999
4000                         if (t < DMU_OT_NUMTYPES)
4001                                 typename = dmu_ot[t].ot_name;
4002                         else
4003                                 typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
4004
4005                         if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
4006                                 (void) printf("%6s\t%5s\t%5s\t%5s"
4007                                     "\t%5s\t%5s\t%6s\t%s\n",
4008                                     "-",
4009                                     "-",
4010                                     "-",
4011                                     "-",
4012                                     "-",
4013                                     "-",
4014                                     "-",
4015                                     typename);
4016                                 continue;
4017                         }
4018
4019                         for (l = ZB_TOTAL - 1; l >= -1; l--) {
4020                                 level = (l == -1 ? ZB_TOTAL : l);
4021                                 zb = &zcb.zcb_type[level][t];
4022
4023                                 if (zb->zb_asize == 0)
4024                                         continue;
4025
4026                                 if (dump_opt['b'] < 3 && level != ZB_TOTAL)
4027                                         continue;
4028
4029                                 if (level == 0 && zb->zb_asize ==
4030                                     zcb.zcb_type[ZB_TOTAL][t].zb_asize)
4031                                         continue;
4032
4033                                 zdb_nicenum(zb->zb_count, csize,
4034                                     sizeof (csize));
4035                                 zdb_nicenum(zb->zb_lsize, lsize,
4036                                     sizeof (lsize));
4037                                 zdb_nicenum(zb->zb_psize, psize,
4038                                     sizeof (psize));
4039                                 zdb_nicenum(zb->zb_asize, asize,
4040                                     sizeof (asize));
4041                                 zdb_nicenum(zb->zb_asize / zb->zb_count, avg,
4042                                     sizeof (avg));
4043                                 zdb_nicenum(zb->zb_gangs, gang, sizeof (gang));
4044
4045                                 (void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
4046                                     "\t%5.2f\t%6.2f\t",
4047                                     csize, lsize, psize, asize, avg,
4048                                     (double)zb->zb_lsize / zb->zb_psize,
4049                                     100.0 * zb->zb_asize / tzb->zb_asize);
4050
4051                                 if (level == ZB_TOTAL)
4052                                         (void) printf("%s\n", typename);
4053                                 else
4054                                         (void) printf("    L%d %s\n",
4055                                             level, typename);
4056
4057                                 if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
4058                                         (void) printf("\t number of ganged "
4059                                             "blocks: %s\n", gang);
4060                                 }
4061
4062                                 if (dump_opt['b'] >= 4) {
4063                                         (void) printf("psize "
4064                                             "(in 512-byte sectors): "
4065                                             "number of blocks\n");
4066                                         dump_histogram(zb->zb_psize_histogram,
4067                                             PSIZE_HISTO_SIZE, 0);
4068                                 }
4069                         }
4070                 }
4071         }
4072
4073         (void) printf("\n");
4074
4075         if (leaks)
4076                 return (2);
4077
4078         if (zcb.zcb_haderrors)
4079                 return (3);
4080
4081         return (0);
4082 }
4083
4084 typedef struct zdb_ddt_entry {
4085         ddt_key_t       zdde_key;
4086         uint64_t        zdde_ref_blocks;
4087         uint64_t        zdde_ref_lsize;
4088         uint64_t        zdde_ref_psize;
4089         uint64_t        zdde_ref_dsize;
4090         avl_node_t      zdde_node;
4091 } zdb_ddt_entry_t;
4092
4093 /* ARGSUSED */
4094 static int
4095 zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
4096     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
4097 {
4098         avl_tree_t *t = arg;
4099         avl_index_t where;
4100         zdb_ddt_entry_t *zdde, zdde_search;
4101
4102         if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
4103                 return (0);
4104
4105         if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
4106                 (void) printf("traversing objset %llu, %llu objects, "
4107                     "%lu blocks so far\n",
4108                     (u_longlong_t)zb->zb_objset,
4109                     (u_longlong_t)BP_GET_FILL(bp),
4110                     avl_numnodes(t));
4111         }
4112
4113         if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
4114             BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
4115                 return (0);
4116
4117         ddt_key_fill(&zdde_search.zdde_key, bp);
4118
4119         zdde = avl_find(t, &zdde_search, &where);
4120
4121         if (zdde == NULL) {
4122                 zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
4123                 zdde->zdde_key = zdde_search.zdde_key;
4124                 avl_insert(t, zdde, where);
4125         }
4126
4127         zdde->zdde_ref_blocks += 1;
4128         zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
4129         zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
4130         zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
4131
4132         return (0);
4133 }
4134
4135 static void
4136 dump_simulated_ddt(spa_t *spa)
4137 {
4138         avl_tree_t t;
4139         void *cookie = NULL;
4140         zdb_ddt_entry_t *zdde;
4141         ddt_histogram_t ddh_total;
4142         ddt_stat_t dds_total;
4143
4144         bzero(&ddh_total, sizeof (ddh_total));
4145         bzero(&dds_total, sizeof (dds_total));
4146         avl_create(&t, ddt_entry_compare,
4147             sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
4148
4149         spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4150
4151         (void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
4152             zdb_ddt_add_cb, &t);
4153
4154         spa_config_exit(spa, SCL_CONFIG, FTAG);
4155
4156         while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
4157                 ddt_stat_t dds;
4158                 uint64_t refcnt = zdde->zdde_ref_blocks;
4159                 ASSERT(refcnt != 0);
4160
4161                 dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
4162                 dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
4163                 dds.dds_psize = zdde->zdde_ref_psize / refcnt;
4164                 dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
4165
4166                 dds.dds_ref_blocks = zdde->zdde_ref_blocks;
4167                 dds.dds_ref_lsize = zdde->zdde_ref_lsize;
4168                 dds.dds_ref_psize = zdde->zdde_ref_psize;
4169                 dds.dds_ref_dsize = zdde->zdde_ref_dsize;
4170
4171                 ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
4172                     &dds, 0);
4173
4174                 umem_free(zdde, sizeof (*zdde));
4175         }
4176
4177         avl_destroy(&t);
4178
4179         ddt_histogram_stat(&dds_total, &ddh_total);
4180
4181         (void) printf("Simulated DDT histogram:\n");
4182
4183         zpool_dump_ddt(&dds_total, &ddh_total);
4184
4185         dump_dedup_ratio(&dds_total);
4186 }
4187
4188 static int
4189 verify_device_removal_feature_counts(spa_t *spa)
4190 {
4191         uint64_t dr_feature_refcount = 0;
4192         uint64_t oc_feature_refcount = 0;
4193         uint64_t indirect_vdev_count = 0;
4194         uint64_t precise_vdev_count = 0;
4195         uint64_t obsolete_counts_object_count = 0;
4196         uint64_t obsolete_sm_count = 0;
4197         uint64_t obsolete_counts_count = 0;
4198         uint64_t scip_count = 0;
4199         uint64_t obsolete_bpobj_count = 0;
4200         int ret = 0;
4201
4202         spa_condensing_indirect_phys_t *scip =
4203             &spa->spa_condensing_indirect_phys;
4204         if (scip->scip_next_mapping_object != 0) {
4205                 vdev_t *vd = spa->spa_root_vdev->vdev_child[scip->scip_vdev];
4206                 ASSERT(scip->scip_prev_obsolete_sm_object != 0);
4207                 ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops);
4208
4209                 (void) printf("Condensing indirect vdev %llu: new mapping "
4210                     "object %llu, prev obsolete sm %llu\n",
4211                     (u_longlong_t)scip->scip_vdev,
4212                     (u_longlong_t)scip->scip_next_mapping_object,
4213                     (u_longlong_t)scip->scip_prev_obsolete_sm_object);
4214                 if (scip->scip_prev_obsolete_sm_object != 0) {
4215                         space_map_t *prev_obsolete_sm = NULL;
4216                         VERIFY0(space_map_open(&prev_obsolete_sm,
4217                             spa->spa_meta_objset,
4218                             scip->scip_prev_obsolete_sm_object,
4219                             0, vd->vdev_asize, 0));
4220                         dump_spacemap(spa->spa_meta_objset, prev_obsolete_sm);
4221                         (void) printf("\n");
4222                         space_map_close(prev_obsolete_sm);
4223                 }
4224
4225                 scip_count += 2;
4226         }
4227
4228         for (uint64_t i = 0; i < spa->spa_root_vdev->vdev_children; i++) {
4229                 vdev_t *vd = spa->spa_root_vdev->vdev_child[i];
4230                 vdev_indirect_config_t *vic = &vd->vdev_indirect_config;
4231
4232                 if (vic->vic_mapping_object != 0) {
4233                         ASSERT(vd->vdev_ops == &vdev_indirect_ops ||
4234                             vd->vdev_removing);
4235                         indirect_vdev_count++;
4236
4237                         if (vd->vdev_indirect_mapping->vim_havecounts) {
4238                                 obsolete_counts_count++;
4239                         }
4240                 }
4241                 if (vdev_obsolete_counts_are_precise(vd)) {
4242                         ASSERT(vic->vic_mapping_object != 0);
4243                         precise_vdev_count++;
4244                 }
4245                 if (vdev_obsolete_sm_object(vd) != 0) {
4246                         ASSERT(vic->vic_mapping_object != 0);
4247                         obsolete_sm_count++;
4248                 }
4249         }
4250
4251         (void) feature_get_refcount(spa,
4252             &spa_feature_table[SPA_FEATURE_DEVICE_REMOVAL],
4253             &dr_feature_refcount);
4254         (void) feature_get_refcount(spa,
4255             &spa_feature_table[SPA_FEATURE_OBSOLETE_COUNTS],
4256             &oc_feature_refcount);
4257
4258         if (dr_feature_refcount != indirect_vdev_count) {
4259                 ret = 1;
4260                 (void) printf("Number of indirect vdevs (%llu) " \
4261                     "does not match feature count (%llu)\n",
4262                     (u_longlong_t)indirect_vdev_count,
4263                     (u_longlong_t)dr_feature_refcount);
4264         } else {
4265                 (void) printf("Verified device_removal feature refcount " \
4266                     "of %llu is correct\n",
4267                     (u_longlong_t)dr_feature_refcount);
4268         }
4269
4270         if (zap_contains(spa_meta_objset(spa), DMU_POOL_DIRECTORY_OBJECT,
4271             DMU_POOL_OBSOLETE_BPOBJ) == 0) {
4272                 obsolete_bpobj_count++;
4273         }
4274
4275
4276         obsolete_counts_object_count = precise_vdev_count;
4277         obsolete_counts_object_count += obsolete_sm_count;
4278         obsolete_counts_object_count += obsolete_counts_count;
4279         obsolete_counts_object_count += scip_count;
4280         obsolete_counts_object_count += obsolete_bpobj_count;
4281         obsolete_counts_object_count += remap_deadlist_count;
4282
4283         if (oc_feature_refcount != obsolete_counts_object_count) {
4284                 ret = 1;
4285                 (void) printf("Number of obsolete counts objects (%llu) " \
4286                     "does not match feature count (%llu)\n",
4287                     (u_longlong_t)obsolete_counts_object_count,
4288                     (u_longlong_t)oc_feature_refcount);
4289                 (void) printf("pv:%llu os:%llu oc:%llu sc:%llu "
4290                     "ob:%llu rd:%llu\n",
4291                     (u_longlong_t)precise_vdev_count,
4292                     (u_longlong_t)obsolete_sm_count,
4293                     (u_longlong_t)obsolete_counts_count,
4294                     (u_longlong_t)scip_count,
4295                     (u_longlong_t)obsolete_bpobj_count,
4296                     (u_longlong_t)remap_deadlist_count);
4297         } else {
4298                 (void) printf("Verified indirect_refcount feature refcount " \
4299                     "of %llu is correct\n",
4300                     (u_longlong_t)oc_feature_refcount);
4301         }
4302         return (ret);
4303 }
4304
4305 static void
4306 zdb_set_skip_mmp(char *target)
4307 {
4308         spa_t *spa;
4309
4310         /*
4311          * Disable the activity check to allow examination of
4312          * active pools.
4313          */
4314         mutex_enter(&spa_namespace_lock);
4315         if ((spa = spa_lookup(target)) != NULL) {
4316                 spa->spa_import_flags |= ZFS_IMPORT_SKIP_MMP;
4317         }
4318         mutex_exit(&spa_namespace_lock);
4319 }
4320
4321 #define BOGUS_SUFFIX "_CHECKPOINTED_UNIVERSE"
4322 /*
4323  * Import the checkpointed state of the pool specified by the target
4324  * parameter as readonly. The function also accepts a pool config
4325  * as an optional parameter, else it attempts to infer the config by
4326  * the name of the target pool.
4327  *
4328  * Note that the checkpointed state's pool name will be the name of
4329  * the original pool with the above suffix appened to it. In addition,
4330  * if the target is not a pool name (e.g. a path to a dataset) then
4331  * the new_path parameter is populated with the updated path to
4332  * reflect the fact that we are looking into the checkpointed state.
4333  *
4334  * The function returns a newly-allocated copy of the name of the
4335  * pool containing the checkpointed state. When this copy is no
4336  * longer needed it should be freed with free(3C). Same thing
4337  * applies to the new_path parameter if allocated.
4338  */
4339 static char *
4340 import_checkpointed_state(char *target, nvlist_t *cfg, char **new_path)
4341 {
4342         int error = 0;
4343         char *poolname, *bogus_name;
4344
4345         /* If the target is not a pool, the extract the pool name */
4346         char *path_start = strchr(target, '/');
4347         if (path_start != NULL) {
4348                 size_t poolname_len = path_start - target;
4349                 poolname = strndup(target, poolname_len);
4350         } else {
4351                 poolname = target;
4352         }
4353
4354         if (cfg == NULL) {
4355                 zdb_set_skip_mmp(poolname);
4356                 error = spa_get_stats(poolname, &cfg, NULL, 0);
4357                 if (error != 0) {
4358                         fatal("Tried to read config of pool \"%s\" but "
4359                             "spa_get_stats() failed with error %d\n",
4360                             poolname, error);
4361                 }
4362         }
4363
4364         (void) asprintf(&bogus_name, "%s%s", poolname, BOGUS_SUFFIX);
4365         fnvlist_add_string(cfg, ZPOOL_CONFIG_POOL_NAME, bogus_name);
4366
4367         error = spa_import(bogus_name, cfg, NULL,
4368             ZFS_IMPORT_MISSING_LOG | ZFS_IMPORT_CHECKPOINT |
4369             ZFS_IMPORT_SKIP_MMP);
4370         if (error != 0) {
4371                 fatal("Tried to import pool \"%s\" but spa_import() failed "
4372                     "with error %d\n", bogus_name, error);
4373         }
4374
4375         if (new_path != NULL && path_start != NULL)
4376                 (void) asprintf(new_path, "%s%s", bogus_name, path_start);
4377
4378         if (target != poolname)
4379                 free(poolname);
4380
4381         return (bogus_name);
4382 }
4383
4384 typedef struct verify_checkpoint_sm_entry_cb_arg {
4385         vdev_t *vcsec_vd;
4386
4387         /* the following fields are only used for printing progress */
4388         uint64_t vcsec_entryid;
4389         uint64_t vcsec_num_entries;
4390 } verify_checkpoint_sm_entry_cb_arg_t;
4391
4392 #define ENTRIES_PER_PROGRESS_UPDATE 10000
4393
4394 static int
4395 verify_checkpoint_sm_entry_cb(space_map_entry_t *sme, void *arg)
4396 {
4397         verify_checkpoint_sm_entry_cb_arg_t *vcsec = arg;
4398         vdev_t *vd = vcsec->vcsec_vd;
4399         metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift];
4400         uint64_t end = sme->sme_offset + sme->sme_run;
4401
4402         ASSERT(sme->sme_type == SM_FREE);
4403
4404         if ((vcsec->vcsec_entryid % ENTRIES_PER_PROGRESS_UPDATE) == 0) {
4405                 (void) fprintf(stderr,
4406                     "\rverifying vdev %llu, space map entry %llu of %llu ...",
4407                     (longlong_t)vd->vdev_id,
4408                     (longlong_t)vcsec->vcsec_entryid,
4409                     (longlong_t)vcsec->vcsec_num_entries);
4410         }
4411         vcsec->vcsec_entryid++;
4412
4413         /*
4414          * See comment in checkpoint_sm_exclude_entry_cb()
4415          */
4416         VERIFY3U(sme->sme_offset, >=, ms->ms_start);
4417         VERIFY3U(end, <=, ms->ms_start + ms->ms_size);
4418
4419         /*
4420          * The entries in the vdev_checkpoint_sm should be marked as
4421          * allocated in the checkpointed state of the pool, therefore
4422          * their respective ms_allocateable trees should not contain them.
4423          */
4424         mutex_enter(&ms->ms_lock);
4425         range_tree_verify_not_present(ms->ms_allocatable,
4426             sme->sme_offset, sme->sme_run);
4427         mutex_exit(&ms->ms_lock);
4428
4429         return (0);
4430 }
4431
4432 /*
4433  * Verify that all segments in the vdev_checkpoint_sm are allocated
4434  * according to the checkpoint's ms_sm (i.e. are not in the checkpoint's
4435  * ms_allocatable).
4436  *
4437  * Do so by comparing the checkpoint space maps (vdev_checkpoint_sm) of
4438  * each vdev in the current state of the pool to the metaslab space maps
4439  * (ms_sm) of the checkpointed state of the pool.
4440  *
4441  * Note that the function changes the state of the ms_allocatable
4442  * trees of the current spa_t. The entries of these ms_allocatable
4443  * trees are cleared out and then repopulated from with the free
4444  * entries of their respective ms_sm space maps.
4445  */
4446 static void
4447 verify_checkpoint_vdev_spacemaps(spa_t *checkpoint, spa_t *current)
4448 {
4449         vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4450         vdev_t *current_rvd = current->spa_root_vdev;
4451
4452         load_concrete_ms_allocatable_trees(checkpoint, SM_FREE);
4453
4454         for (uint64_t c = 0; c < ckpoint_rvd->vdev_children; c++) {
4455                 vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[c];
4456                 vdev_t *current_vd = current_rvd->vdev_child[c];
4457
4458                 space_map_t *checkpoint_sm = NULL;
4459                 uint64_t checkpoint_sm_obj;
4460
4461                 if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4462                         /*
4463                          * Since we don't allow device removal in a pool
4464                          * that has a checkpoint, we expect that all removed
4465                          * vdevs were removed from the pool before the
4466                          * checkpoint.
4467                          */
4468                         ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4469                         continue;
4470                 }
4471
4472                 /*
4473                  * If the checkpoint space map doesn't exist, then nothing
4474                  * here is checkpointed so there's nothing to verify.
4475                  */
4476                 if (current_vd->vdev_top_zap == 0 ||
4477                     zap_contains(spa_meta_objset(current),
4478                     current_vd->vdev_top_zap,
4479                     VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4480                         continue;
4481
4482                 VERIFY0(zap_lookup(spa_meta_objset(current),
4483                     current_vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4484                     sizeof (uint64_t), 1, &checkpoint_sm_obj));
4485
4486                 VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(current),
4487                     checkpoint_sm_obj, 0, current_vd->vdev_asize,
4488                     current_vd->vdev_ashift));
4489
4490                 verify_checkpoint_sm_entry_cb_arg_t vcsec;
4491                 vcsec.vcsec_vd = ckpoint_vd;
4492                 vcsec.vcsec_entryid = 0;
4493                 vcsec.vcsec_num_entries =
4494                     space_map_length(checkpoint_sm) / sizeof (uint64_t);
4495                 VERIFY0(space_map_iterate(checkpoint_sm,
4496                     space_map_length(checkpoint_sm),
4497                     verify_checkpoint_sm_entry_cb, &vcsec));
4498                 dump_spacemap(current->spa_meta_objset, checkpoint_sm);
4499                 space_map_close(checkpoint_sm);
4500         }
4501
4502         /*
4503          * If we've added vdevs since we took the checkpoint, ensure
4504          * that their checkpoint space maps are empty.
4505          */
4506         if (ckpoint_rvd->vdev_children < current_rvd->vdev_children) {
4507                 for (uint64_t c = ckpoint_rvd->vdev_children;
4508                     c < current_rvd->vdev_children; c++) {
4509                         vdev_t *current_vd = current_rvd->vdev_child[c];
4510                         ASSERT3P(current_vd->vdev_checkpoint_sm, ==, NULL);
4511                 }
4512         }
4513
4514         /* for cleaner progress output */
4515         (void) fprintf(stderr, "\n");
4516 }
4517
4518 /*
4519  * Verifies that all space that's allocated in the checkpoint is
4520  * still allocated in the current version, by checking that everything
4521  * in checkpoint's ms_allocatable (which is actually allocated, not
4522  * allocatable/free) is not present in current's ms_allocatable.
4523  *
4524  * Note that the function changes the state of the ms_allocatable
4525  * trees of both spas when called. The entries of all ms_allocatable
4526  * trees are cleared out and then repopulated from their respective
4527  * ms_sm space maps. In the checkpointed state we load the allocated
4528  * entries, and in the current state we load the free entries.
4529  */
4530 static void
4531 verify_checkpoint_ms_spacemaps(spa_t *checkpoint, spa_t *current)
4532 {
4533         vdev_t *ckpoint_rvd = checkpoint->spa_root_vdev;
4534         vdev_t *current_rvd = current->spa_root_vdev;
4535
4536         load_concrete_ms_allocatable_trees(checkpoint, SM_ALLOC);
4537         load_concrete_ms_allocatable_trees(current, SM_FREE);
4538
4539         for (uint64_t i = 0; i < ckpoint_rvd->vdev_children; i++) {
4540                 vdev_t *ckpoint_vd = ckpoint_rvd->vdev_child[i];
4541                 vdev_t *current_vd = current_rvd->vdev_child[i];
4542
4543                 if (ckpoint_vd->vdev_ops == &vdev_indirect_ops) {
4544                         /*
4545                          * See comment in verify_checkpoint_vdev_spacemaps()
4546                          */
4547                         ASSERT3P(current_vd->vdev_ops, ==, &vdev_indirect_ops);
4548                         continue;
4549                 }
4550
4551                 for (uint64_t m = 0; m < ckpoint_vd->vdev_ms_count; m++) {
4552                         metaslab_t *ckpoint_msp = ckpoint_vd->vdev_ms[m];
4553                         metaslab_t *current_msp = current_vd->vdev_ms[m];
4554
4555                         (void) fprintf(stderr,
4556                             "\rverifying vdev %llu of %llu, "
4557                             "metaslab %llu of %llu ...",
4558                             (longlong_t)current_vd->vdev_id,
4559                             (longlong_t)current_rvd->vdev_children,
4560                             (longlong_t)current_vd->vdev_ms[m]->ms_id,
4561                             (longlong_t)current_vd->vdev_ms_count);
4562
4563                         /*
4564                          * We walk through the ms_allocatable trees that
4565                          * are loaded with the allocated blocks from the
4566                          * ms_sm spacemaps of the checkpoint. For each
4567                          * one of these ranges we ensure that none of them
4568                          * exists in the ms_allocatable trees of the
4569                          * current state which are loaded with the ranges
4570                          * that are currently free.
4571                          *
4572                          * This way we ensure that none of the blocks that
4573                          * are part of the checkpoint were freed by mistake.
4574                          */
4575                         range_tree_walk(ckpoint_msp->ms_allocatable,
4576                             (range_tree_func_t *)range_tree_verify_not_present,
4577                             current_msp->ms_allocatable);
4578                 }
4579         }
4580
4581         /* for cleaner progress output */
4582         (void) fprintf(stderr, "\n");
4583 }
4584
4585 static void
4586 verify_checkpoint_blocks(spa_t *spa)
4587 {
4588         ASSERT(!dump_opt['L']);
4589
4590         spa_t *checkpoint_spa;
4591         char *checkpoint_pool;
4592         nvlist_t *config = NULL;
4593         int error = 0;
4594
4595         /*
4596          * We import the checkpointed state of the pool (under a different
4597          * name) so we can do verification on it against the current state
4598          * of the pool.
4599          */
4600         checkpoint_pool = import_checkpointed_state(spa->spa_name, config,
4601             NULL);
4602         ASSERT(strcmp(spa->spa_name, checkpoint_pool) != 0);
4603
4604         error = spa_open(checkpoint_pool, &checkpoint_spa, FTAG);
4605         if (error != 0) {
4606                 fatal("Tried to open pool \"%s\" but spa_open() failed with "
4607                     "error %d\n", checkpoint_pool, error);
4608         }
4609
4610         /*
4611          * Ensure that ranges in the checkpoint space maps of each vdev
4612          * are allocated according to the checkpointed state's metaslab
4613          * space maps.
4614          */
4615         verify_checkpoint_vdev_spacemaps(checkpoint_spa, spa);
4616
4617         /*
4618          * Ensure that allocated ranges in the checkpoint's metaslab
4619          * space maps remain allocated in the metaslab space maps of
4620          * the current state.
4621          */
4622         verify_checkpoint_ms_spacemaps(checkpoint_spa, spa);
4623
4624         /*
4625          * Once we are done, we get rid of the checkpointed state.
4626          */
4627         spa_close(checkpoint_spa, FTAG);
4628         free(checkpoint_pool);
4629 }
4630
4631 static void
4632 dump_leftover_checkpoint_blocks(spa_t *spa)
4633 {
4634         vdev_t *rvd = spa->spa_root_vdev;
4635
4636         for (uint64_t i = 0; i < rvd->vdev_children; i++) {
4637                 vdev_t *vd = rvd->vdev_child[i];
4638
4639                 space_map_t *checkpoint_sm = NULL;
4640                 uint64_t checkpoint_sm_obj;
4641
4642                 if (vd->vdev_top_zap == 0)
4643                         continue;
4644
4645                 if (zap_contains(spa_meta_objset(spa), vd->vdev_top_zap,
4646                     VDEV_TOP_ZAP_POOL_CHECKPOINT_SM) != 0)
4647                         continue;
4648
4649                 VERIFY0(zap_lookup(spa_meta_objset(spa), vd->vdev_top_zap,
4650                     VDEV_TOP_ZAP_POOL_CHECKPOINT_SM,
4651                     sizeof (uint64_t), 1, &checkpoint_sm_obj));
4652
4653                 VERIFY0(space_map_open(&checkpoint_sm, spa_meta_objset(spa),
4654                     checkpoint_sm_obj, 0, vd->vdev_asize, vd->vdev_ashift));
4655                 dump_spacemap(spa->spa_meta_objset, checkpoint_sm);
4656                 space_map_close(checkpoint_sm);
4657         }
4658 }
4659
4660 static int
4661 verify_checkpoint(spa_t *spa)
4662 {
4663         uberblock_t checkpoint;
4664         int error;
4665
4666         if (!spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT))
4667                 return (0);
4668
4669         error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
4670             DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t),
4671             sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint);
4672
4673         if (error == ENOENT && !dump_opt['L']) {
4674                 /*
4675                  * If the feature is active but the uberblock is missing
4676                  * then we must be in the middle of discarding the
4677                  * checkpoint.
4678                  */
4679                 (void) printf("\nPartially discarded checkpoint "
4680                     "state found:\n");
4681                 dump_leftover_checkpoint_blocks(spa);
4682                 return (0);
4683         } else if (error != 0) {
4684                 (void) printf("lookup error %d when looking for "
4685                     "checkpointed uberblock in MOS\n", error);
4686                 return (error);
4687         }
4688         dump_uberblock(&checkpoint, "\nCheckpointed uberblock found:\n", "\n");
4689
4690         if (checkpoint.ub_checkpoint_txg == 0) {
4691                 (void) printf("\nub_checkpoint_txg not set in checkpointed "
4692                     "uberblock\n");
4693                 error = 3;
4694         }
4695
4696         if (error == 0 && !dump_opt['L'])
4697                 verify_checkpoint_blocks(spa);
4698
4699         return (error);
4700 }
4701
4702 /* ARGSUSED */
4703 static void
4704 mos_leaks_cb(void *arg, uint64_t start, uint64_t size)
4705 {
4706         for (uint64_t i = start; i < size; i++) {
4707                 (void) printf("MOS object %llu referenced but not allocated\n",
4708                     (u_longlong_t)i);
4709         }
4710 }
4711
4712 static range_tree_t *mos_refd_objs;
4713
4714 static void
4715 mos_obj_refd(uint64_t obj)
4716 {
4717         if (obj != 0 && mos_refd_objs != NULL)
4718                 range_tree_add(mos_refd_objs, obj, 1);
4719 }
4720
4721 static void
4722 mos_leak_vdev(vdev_t *vd)
4723 {
4724         mos_obj_refd(vd->vdev_dtl_object);
4725         mos_obj_refd(vd->vdev_ms_array);
4726         mos_obj_refd(vd->vdev_top_zap);
4727         mos_obj_refd(vd->vdev_indirect_config.vic_births_object);
4728         mos_obj_refd(vd->vdev_indirect_config.vic_mapping_object);
4729         mos_obj_refd(vd->vdev_leaf_zap);
4730         if (vd->vdev_checkpoint_sm != NULL)
4731                 mos_obj_refd(vd->vdev_checkpoint_sm->sm_object);
4732         if (vd->vdev_indirect_mapping != NULL) {
4733                 mos_obj_refd(vd->vdev_indirect_mapping->
4734                     vim_phys->vimp_counts_object);
4735         }
4736         if (vd->vdev_obsolete_sm != NULL)
4737                 mos_obj_refd(vd->vdev_obsolete_sm->sm_object);
4738
4739         for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
4740                 metaslab_t *ms = vd->vdev_ms[m];
4741                 mos_obj_refd(space_map_object(ms->ms_sm));
4742         }
4743
4744         for (uint64_t c = 0; c < vd->vdev_children; c++) {
4745                 mos_leak_vdev(vd->vdev_child[c]);
4746         }
4747 }
4748
4749 static int
4750 dump_mos_leaks(spa_t *spa)
4751 {
4752         int rv = 0;
4753         objset_t *mos = spa->spa_meta_objset;
4754         dsl_pool_t *dp = spa->spa_dsl_pool;
4755
4756         /* Visit and mark all referenced objects in the MOS */
4757
4758         mos_obj_refd(DMU_POOL_DIRECTORY_OBJECT);
4759         mos_obj_refd(spa->spa_pool_props_object);
4760         mos_obj_refd(spa->spa_config_object);
4761         mos_obj_refd(spa->spa_ddt_stat_object);
4762         mos_obj_refd(spa->spa_feat_desc_obj);
4763         mos_obj_refd(spa->spa_feat_enabled_txg_obj);
4764         mos_obj_refd(spa->spa_feat_for_read_obj);
4765         mos_obj_refd(spa->spa_feat_for_write_obj);
4766         mos_obj_refd(spa->spa_history);
4767         mos_obj_refd(spa->spa_errlog_last);
4768         mos_obj_refd(spa->spa_errlog_scrub);
4769         mos_obj_refd(spa->spa_all_vdev_zaps);
4770         mos_obj_refd(spa->spa_dsl_pool->dp_bptree_obj);
4771         mos_obj_refd(spa->spa_dsl_pool->dp_tmp_userrefs_obj);
4772         mos_obj_refd(spa->spa_dsl_pool->dp_scan->scn_phys.scn_queue_obj);
4773         bpobj_count_refd(&spa->spa_deferred_bpobj);
4774         mos_obj_refd(dp->dp_empty_bpobj);
4775         bpobj_count_refd(&dp->dp_obsolete_bpobj);
4776         bpobj_count_refd(&dp->dp_free_bpobj);
4777         mos_obj_refd(spa->spa_l2cache.sav_object);
4778         mos_obj_refd(spa->spa_spares.sav_object);
4779
4780         mos_obj_refd(spa->spa_condensing_indirect_phys.
4781             scip_next_mapping_object);
4782         mos_obj_refd(spa->spa_condensing_indirect_phys.
4783             scip_prev_obsolete_sm_object);
4784         if (spa->spa_condensing_indirect_phys.scip_next_mapping_object != 0) {
4785                 vdev_indirect_mapping_t *vim =
4786                     vdev_indirect_mapping_open(mos,
4787                     spa->spa_condensing_indirect_phys.scip_next_mapping_object);
4788                 mos_obj_refd(vim->vim_phys->vimp_counts_object);
4789                 vdev_indirect_mapping_close(vim);
4790         }
4791
4792         if (dp->dp_origin_snap != NULL) {
4793                 dsl_dataset_t *ds;
4794
4795                 dsl_pool_config_enter(dp, FTAG);
4796                 VERIFY0(dsl_dataset_hold_obj(dp,
4797                     dsl_dataset_phys(dp->dp_origin_snap)->ds_next_snap_obj,
4798                     FTAG, &ds));
4799                 count_ds_mos_objects(ds);
4800                 dump_deadlist(&ds->ds_deadlist);
4801                 dsl_dataset_rele(ds, FTAG);
4802                 dsl_pool_config_exit(dp, FTAG);
4803
4804                 count_ds_mos_objects(dp->dp_origin_snap);
4805                 dump_deadlist(&dp->dp_origin_snap->ds_deadlist);
4806         }
4807         count_dir_mos_objects(dp->dp_mos_dir);
4808         if (dp->dp_free_dir != NULL)
4809                 count_dir_mos_objects(dp->dp_free_dir);
4810         if (dp->dp_leak_dir != NULL)
4811                 count_dir_mos_objects(dp->dp_leak_dir);
4812
4813         mos_leak_vdev(spa->spa_root_vdev);
4814
4815         for (uint64_t class = 0; class < DDT_CLASSES; class++) {
4816                 for (uint64_t type = 0; type < DDT_TYPES; type++) {
4817                         for (uint64_t cksum = 0;
4818                             cksum < ZIO_CHECKSUM_FUNCTIONS; cksum++) {
4819                                 ddt_t *ddt = spa->spa_ddt[cksum];
4820                                 mos_obj_refd(ddt->ddt_object[type][class]);
4821                         }
4822                 }
4823         }
4824
4825         /*
4826          * Visit all allocated objects and make sure they are referenced.
4827          */
4828         uint64_t object = 0;
4829         while (dmu_object_next(mos, &object, B_FALSE, 0) == 0) {
4830                 if (range_tree_contains(mos_refd_objs, object, 1)) {
4831                         range_tree_remove(mos_refd_objs, object, 1);
4832                 } else {
4833                         dmu_object_info_t doi;
4834                         const char *name;
4835                         dmu_object_info(mos, object, &doi);
4836                         if (doi.doi_type & DMU_OT_NEWTYPE) {
4837                                 dmu_object_byteswap_t bswap =
4838                                     DMU_OT_BYTESWAP(doi.doi_type);
4839                                 name = dmu_ot_byteswap[bswap].ob_name;
4840                         } else {
4841                                 name = dmu_ot[doi.doi_type].ot_name;
4842                         }
4843
4844                         (void) printf("MOS object %llu (%s) leaked\n",
4845                             (u_longlong_t)object, name);
4846                         rv = 2;
4847                 }
4848         }
4849         (void) range_tree_walk(mos_refd_objs, mos_leaks_cb, NULL);
4850         if (!range_tree_is_empty(mos_refd_objs))
4851                 rv = 2;
4852         range_tree_vacate(mos_refd_objs, NULL, NULL);
4853         range_tree_destroy(mos_refd_objs);
4854         return (rv);
4855 }
4856
4857 static void
4858 dump_zpool(spa_t *spa)
4859 {
4860         dsl_pool_t *dp = spa_get_dsl(spa);
4861         int rc = 0;
4862
4863         if (dump_opt['S']) {
4864                 dump_simulated_ddt(spa);
4865                 return;
4866         }
4867
4868         if (!dump_opt['e'] && dump_opt['C'] > 1) {
4869                 (void) printf("\nCached configuration:\n");
4870                 dump_nvlist(spa->spa_config, 8);
4871         }
4872
4873         if (dump_opt['C'])
4874                 dump_config(spa);
4875
4876         if (dump_opt['u'])
4877                 dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
4878
4879         if (dump_opt['D'])
4880                 dump_all_ddts(spa);
4881
4882         if (dump_opt['d'] > 2 || dump_opt['m'])
4883                 dump_metaslabs(spa);
4884         if (dump_opt['M'])
4885                 dump_metaslab_groups(spa);
4886
4887         if (dump_opt['d'] || dump_opt['i']) {
4888                 mos_refd_objs = range_tree_create(NULL, NULL);
4889                 dump_dir(dp->dp_meta_objset);
4890
4891                 if (dump_opt['d'] >= 3) {
4892                         dsl_pool_t *dp = spa->spa_dsl_pool;
4893                         dump_full_bpobj(&spa->spa_deferred_bpobj,
4894                             "Deferred frees", 0);
4895                         if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
4896                                 dump_full_bpobj(&dp->dp_free_bpobj,
4897                                     "Pool snapshot frees", 0);
4898                         }
4899                         if (bpobj_is_open(&dp->dp_obsolete_bpobj)) {
4900                                 ASSERT(spa_feature_is_enabled(spa,
4901                                     SPA_FEATURE_DEVICE_REMOVAL));
4902                                 dump_full_bpobj(&dp->dp_obsolete_bpobj,
4903                                     "Pool obsolete blocks", 0);
4904                         }
4905
4906                         if (spa_feature_is_active(spa,
4907                             SPA_FEATURE_ASYNC_DESTROY)) {
4908                                 dump_bptree(spa->spa_meta_objset,
4909                                     dp->dp_bptree_obj,
4910                                     "Pool dataset frees");
4911                         }
4912                         dump_dtl(spa->spa_root_vdev, 0);
4913                 }
4914                 (void) dmu_objset_find(spa_name(spa), dump_one_dir,
4915                     NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
4916
4917                 if (rc == 0 && !dump_opt['L'])
4918                         rc = dump_mos_leaks(spa);
4919
4920                 for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
4921                         uint64_t refcount;
4922
4923                         if (!(spa_feature_table[f].fi_flags &
4924                             ZFEATURE_FLAG_PER_DATASET)) {
4925                                 ASSERT0(dataset_feature_count[f]);
4926                                 continue;
4927                         }
4928                         (void) feature_get_refcount(spa,
4929                             &spa_feature_table[f], &refcount);
4930                         if (dataset_feature_count[f] != refcount) {
4931                                 (void) printf("%s feature refcount mismatch: "
4932                                     "%lld datasets != %lld refcount\n",
4933                                     spa_feature_table[f].fi_uname,
4934                                     (longlong_t)dataset_feature_count[f],
4935                                     (longlong_t)refcount);
4936                                 rc = 2;
4937                         } else {
4938                                 (void) printf("Verified %s feature refcount "
4939                                     "of %llu is correct\n",
4940                                     spa_feature_table[f].fi_uname,
4941                                     (longlong_t)refcount);
4942                         }
4943                 }
4944
4945                 if (rc == 0) {
4946                         rc = verify_device_removal_feature_counts(spa);
4947                 }
4948         }
4949
4950         if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
4951                 rc = dump_block_stats(spa);
4952
4953         if (rc == 0)
4954                 rc = verify_spacemap_refcounts(spa);
4955
4956         if (dump_opt['s'])
4957                 show_pool_stats(spa);
4958
4959         if (dump_opt['h'])
4960                 dump_history(spa);
4961
4962         if (rc == 0)
4963                 rc = verify_checkpoint(spa);
4964
4965         if (rc != 0) {
4966                 dump_debug_buffer();
4967                 exit(rc);
4968         }
4969 }
4970
4971 #define ZDB_FLAG_CHECKSUM       0x0001
4972 #define ZDB_FLAG_DECOMPRESS     0x0002
4973 #define ZDB_FLAG_BSWAP          0x0004
4974 #define ZDB_FLAG_GBH            0x0008
4975 #define ZDB_FLAG_INDIRECT       0x0010
4976 #define ZDB_FLAG_PHYS           0x0020
4977 #define ZDB_FLAG_RAW            0x0040
4978 #define ZDB_FLAG_PRINT_BLKPTR   0x0080
4979
4980 static int flagbits[256];
4981
4982 static void
4983 zdb_print_blkptr(blkptr_t *bp, int flags)
4984 {
4985         char blkbuf[BP_SPRINTF_LEN];
4986
4987         if (flags & ZDB_FLAG_BSWAP)
4988                 byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
4989
4990         snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
4991         (void) printf("%s\n", blkbuf);
4992 }
4993
4994 static void
4995 zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
4996 {
4997         int i;
4998
4999         for (i = 0; i < nbps; i++)
5000                 zdb_print_blkptr(&bp[i], flags);
5001 }
5002
5003 static void
5004 zdb_dump_gbh(void *buf, int flags)
5005 {
5006         zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
5007 }
5008
5009 static void
5010 zdb_dump_block_raw(void *buf, uint64_t size, int flags)
5011 {
5012         if (flags & ZDB_FLAG_BSWAP)
5013                 byteswap_uint64_array(buf, size);
5014         (void) write(1, buf, size);
5015 }
5016
5017 static void
5018 zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
5019 {
5020         uint64_t *d = (uint64_t *)buf;
5021         unsigned nwords = size / sizeof (uint64_t);
5022         int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
5023         unsigned i, j;
5024         const char *hdr;
5025         char *c;
5026
5027
5028         if (do_bswap)
5029                 hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
5030         else
5031                 hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
5032
5033         (void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
5034
5035         for (i = 0; i < nwords; i += 2) {
5036                 (void) printf("%06llx:  %016llx  %016llx  ",
5037                     (u_longlong_t)(i * sizeof (uint64_t)),
5038                     (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
5039                     (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
5040
5041                 c = (char *)&d[i];
5042                 for (j = 0; j < 2 * sizeof (uint64_t); j++)
5043                         (void) printf("%c", isprint(c[j]) ? c[j] : '.');
5044                 (void) printf("\n");
5045         }
5046 }
5047
5048 /*
5049  * There are two acceptable formats:
5050  *      leaf_name         - For example: c1t0d0 or /tmp/ztest.0a
5051  *      child[.child]*    - For example: 0.1.1
5052  *
5053  * The second form can be used to specify arbitrary vdevs anywhere
5054  * in the heirarchy.  For example, in a pool with a mirror of
5055  * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
5056  */
5057 static vdev_t *
5058 zdb_vdev_lookup(vdev_t *vdev, const char *path)
5059 {
5060         char *s, *p, *q;
5061         unsigned i;
5062
5063         if (vdev == NULL)
5064                 return (NULL);
5065
5066         /* First, assume the x.x.x.x format */
5067         i = strtoul(path, &s, 10);
5068         if (s == path || (s && *s != '.' && *s != '\0'))
5069                 goto name;
5070         if (i >= vdev->vdev_children)
5071                 return (NULL);
5072
5073         vdev = vdev->vdev_child[i];
5074         if (*s == '\0')
5075                 return (vdev);
5076         return (zdb_vdev_lookup(vdev, s+1));
5077
5078 name:
5079         for (i = 0; i < vdev->vdev_children; i++) {
5080                 vdev_t *vc = vdev->vdev_child[i];
5081
5082                 if (vc->vdev_path == NULL) {
5083                         vc = zdb_vdev_lookup(vc, path);
5084                         if (vc == NULL)
5085                                 continue;
5086                         else
5087                                 return (vc);
5088                 }
5089
5090                 p = strrchr(vc->vdev_path, '/');
5091                 p = p ? p + 1 : vc->vdev_path;
5092                 q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
5093
5094                 if (strcmp(vc->vdev_path, path) == 0)
5095                         return (vc);
5096                 if (strcmp(p, path) == 0)
5097                         return (vc);
5098                 if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
5099                         return (vc);
5100         }
5101
5102         return (NULL);
5103 }
5104
5105 /* ARGSUSED */
5106 static int
5107 random_get_pseudo_bytes_cb(void *buf, size_t len, void *unused)
5108 {
5109         return (random_get_pseudo_bytes(buf, len));
5110 }
5111
5112 /*
5113  * Read a block from a pool and print it out.  The syntax of the
5114  * block descriptor is:
5115  *
5116  *      pool:vdev_specifier:offset:size[:flags]
5117  *
5118  *      pool           - The name of the pool you wish to read from
5119  *      vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
5120  *      offset         - offset, in hex, in bytes
5121  *      size           - Amount of data to read, in hex, in bytes
5122  *      flags          - A string of characters specifying options
5123  *               b: Decode a blkptr at given offset within block
5124  *              *c: Calculate and display checksums
5125  *               d: Decompress data before dumping
5126  *               e: Byteswap data before dumping
5127  *               g: Display data as a gang block header
5128  *               i: Display as an indirect block
5129  *               p: Do I/O to physical offset
5130  *               r: Dump raw data to stdout
5131  *
5132  *              * = not yet implemented
5133  */
5134 static void
5135 zdb_read_block(char *thing, spa_t *spa)
5136 {
5137         blkptr_t blk, *bp = &blk;
5138         dva_t *dva = bp->blk_dva;
5139         int flags = 0;
5140         uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
5141         zio_t *zio;
5142         vdev_t *vd;
5143         abd_t *pabd;
5144         void *lbuf, *buf;
5145         const char *s, *vdev;
5146         char *p, *dup, *flagstr;
5147         int i, error;
5148
5149         dup = strdup(thing);
5150         s = strtok(dup, ":");
5151         vdev = s ? s : "";
5152         s = strtok(NULL, ":");
5153         offset = strtoull(s ? s : "", NULL, 16);
5154         s = strtok(NULL, ":");
5155         size = strtoull(s ? s : "", NULL, 16);
5156         s = strtok(NULL, ":");
5157         if (s)
5158                 flagstr = strdup(s);
5159         else
5160                 flagstr = strdup("");
5161
5162         s = NULL;
5163         if (size == 0)
5164                 s = "size must not be zero";
5165         if (!IS_P2ALIGNED(size, DEV_BSIZE))
5166                 s = "size must be a multiple of sector size";
5167         if (!IS_P2ALIGNED(offset, DEV_BSIZE))
5168                 s = "offset must be a multiple of sector size";
5169         if (s) {
5170                 (void) printf("Invalid block specifier: %s  - %s\n", thing, s);
5171                 free(flagstr);
5172                 free(dup);
5173                 return;
5174         }
5175
5176         for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
5177                 for (i = 0; flagstr[i]; i++) {
5178                         int bit = flagbits[(uchar_t)flagstr[i]];
5179
5180                         if (bit == 0) {
5181                                 (void) printf("***Invalid flag: %c\n",
5182                                     flagstr[i]);
5183                                 continue;
5184                         }
5185                         flags |= bit;
5186
5187                         /* If it's not something with an argument, keep going */
5188                         if ((bit & (ZDB_FLAG_CHECKSUM |
5189                             ZDB_FLAG_PRINT_BLKPTR)) == 0)
5190                                 continue;
5191
5192                         p = &flagstr[i + 1];
5193                         if (bit == ZDB_FLAG_PRINT_BLKPTR)
5194                                 blkptr_offset = strtoull(p, &p, 16);
5195                         if (*p != ':' && *p != '\0') {
5196                                 (void) printf("***Invalid flag arg: '%s'\n", s);
5197                                 free(flagstr);
5198                                 free(dup);
5199                                 return;
5200                         }
5201                         i += p - &flagstr[i + 1]; /* skip over the number */
5202                 }
5203         }
5204         free(flagstr);
5205
5206         vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
5207         if (vd == NULL) {
5208                 (void) printf("***Invalid vdev: %s\n", vdev);
5209                 free(dup);
5210                 return;
5211         } else {
5212                 if (vd->vdev_path)
5213                         (void) fprintf(stderr, "Found vdev: %s\n",
5214                             vd->vdev_path);
5215                 else
5216                         (void) fprintf(stderr, "Found vdev type: %s\n",
5217                             vd->vdev_ops->vdev_op_type);
5218         }
5219
5220         psize = size;
5221         lsize = size;
5222
5223         pabd = abd_alloc_linear(SPA_MAXBLOCKSIZE, B_FALSE);
5224         lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5225
5226         BP_ZERO(bp);
5227
5228         DVA_SET_VDEV(&dva[0], vd->vdev_id);
5229         DVA_SET_OFFSET(&dva[0], offset);
5230         DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
5231         DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
5232
5233         BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
5234
5235         BP_SET_LSIZE(bp, lsize);
5236         BP_SET_PSIZE(bp, psize);
5237         BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
5238         BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
5239         BP_SET_TYPE(bp, DMU_OT_NONE);
5240         BP_SET_LEVEL(bp, 0);
5241         BP_SET_DEDUP(bp, 0);
5242         BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
5243
5244         spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
5245         zio = zio_root(spa, NULL, NULL, 0);
5246
5247         if (vd == vd->vdev_top) {
5248                 /*
5249                  * Treat this as a normal block read.
5250                  */
5251                 zio_nowait(zio_read(zio, spa, bp, pabd, psize, NULL, NULL,
5252                     ZIO_PRIORITY_SYNC_READ,
5253                     ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
5254         } else {
5255                 /*
5256                  * Treat this as a vdev child I/O.
5257                  */
5258                 zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pabd,
5259                     psize, ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
5260                     ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
5261                     ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
5262                     ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW | ZIO_FLAG_OPTIONAL,
5263                     NULL, NULL));
5264         }
5265
5266         error = zio_wait(zio);
5267         spa_config_exit(spa, SCL_STATE, FTAG);
5268
5269         if (error) {
5270                 (void) printf("Read of %s failed, error: %d\n", thing, error);
5271                 goto out;
5272         }
5273
5274         if (flags & ZDB_FLAG_DECOMPRESS) {
5275                 /*
5276                  * We don't know how the data was compressed, so just try
5277                  * every decompress function at every inflated blocksize.
5278                  */
5279                 enum zio_compress c;
5280                 void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5281                 void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
5282
5283                 abd_copy_to_buf(pbuf2, pabd, psize);
5284
5285                 VERIFY0(abd_iterate_func(pabd, psize, SPA_MAXBLOCKSIZE - psize,
5286                     random_get_pseudo_bytes_cb, NULL));
5287
5288                 VERIFY0(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
5289                     SPA_MAXBLOCKSIZE - psize));
5290
5291                 for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
5292                     lsize -= SPA_MINBLOCKSIZE) {
5293                         for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
5294                                 if (zio_decompress_data(c, pabd,
5295                                     lbuf, psize, lsize) == 0 &&
5296                                     zio_decompress_data_buf(c, pbuf2,
5297                                     lbuf2, psize, lsize) == 0 &&
5298                                     bcmp(lbuf, lbuf2, lsize) == 0)
5299                                         break;
5300                         }
5301                         if (c != ZIO_COMPRESS_FUNCTIONS)
5302                                 break;
5303                         lsize -= SPA_MINBLOCKSIZE;
5304                 }
5305
5306                 umem_free(pbuf2, SPA_MAXBLOCKSIZE);
5307                 umem_free(lbuf2, SPA_MAXBLOCKSIZE);
5308
5309                 if (lsize <= psize) {
5310                         (void) printf("Decompress of %s failed\n", thing);
5311                         goto out;
5312                 }
5313                 buf = lbuf;
5314                 size = lsize;
5315         } else {
5316                 buf = abd_to_buf(pabd);
5317                 size = psize;
5318         }
5319
5320         if (flags & ZDB_FLAG_PRINT_BLKPTR)
5321                 zdb_print_blkptr((blkptr_t *)(void *)
5322                     ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
5323         else if (flags & ZDB_FLAG_RAW)
5324                 zdb_dump_block_raw(buf, size, flags);
5325         else if (flags & ZDB_FLAG_INDIRECT)
5326                 zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
5327                     flags);
5328         else if (flags & ZDB_FLAG_GBH)
5329                 zdb_dump_gbh(buf, flags);
5330         else
5331                 zdb_dump_block(thing, buf, size, flags);
5332
5333 out:
5334         abd_free(pabd);
5335         umem_free(lbuf, SPA_MAXBLOCKSIZE);
5336         free(dup);
5337 }
5338
5339 static void
5340 zdb_embedded_block(char *thing)
5341 {
5342         blkptr_t bp;
5343         unsigned long long *words = (void *)&bp;
5344         char *buf;
5345         int err;
5346
5347         bzero(&bp, sizeof (bp));
5348         err = sscanf(thing, "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx:"
5349             "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx",
5350             words + 0, words + 1, words + 2, words + 3,
5351             words + 4, words + 5, words + 6, words + 7,
5352             words + 8, words + 9, words + 10, words + 11,
5353             words + 12, words + 13, words + 14, words + 15);
5354         if (err != 16) {
5355                 (void) fprintf(stderr, "invalid input format\n");
5356                 exit(1);
5357         }
5358         ASSERT3U(BPE_GET_LSIZE(&bp), <=, SPA_MAXBLOCKSIZE);
5359         buf = malloc(SPA_MAXBLOCKSIZE);
5360         if (buf == NULL) {
5361                 (void) fprintf(stderr, "out of memory\n");
5362                 exit(1);
5363         }
5364         err = decode_embedded_bp(&bp, buf, BPE_GET_LSIZE(&bp));
5365         if (err != 0) {
5366                 (void) fprintf(stderr, "decode failed: %u\n", err);
5367                 free(buf);
5368                 exit(1);
5369         }
5370         zdb_dump_block_raw(buf, BPE_GET_LSIZE(&bp), 0);
5371         free(buf);
5372 }
5373
5374 int
5375 main(int argc, char **argv)
5376 {
5377         int c;
5378         struct rlimit rl = { 1024, 1024 };
5379         spa_t *spa = NULL;
5380         objset_t *os = NULL;
5381         int dump_all = 1;
5382         int verbose = 0;
5383         int error = 0;
5384         char **searchdirs = NULL;
5385         int nsearch = 0;
5386         char *target, *target_pool;
5387         nvlist_t *policy = NULL;
5388         uint64_t max_txg = UINT64_MAX;
5389         int flags = ZFS_IMPORT_MISSING_LOG;
5390         int rewind = ZPOOL_NEVER_REWIND;
5391         char *spa_config_path_env;
5392         boolean_t target_is_spa = B_TRUE;
5393         nvlist_t *cfg = NULL;
5394
5395         (void) setrlimit(RLIMIT_NOFILE, &rl);
5396         (void) enable_extended_FILE_stdio(-1, -1);
5397
5398         dprintf_setup(&argc, argv);
5399
5400         /*
5401          * If there is an environment variable SPA_CONFIG_PATH it overrides
5402          * default spa_config_path setting. If -U flag is specified it will
5403          * override this environment variable settings once again.
5404          */
5405         spa_config_path_env = getenv("SPA_CONFIG_PATH");
5406         if (spa_config_path_env != NULL)
5407                 spa_config_path = spa_config_path_env;
5408
5409         while ((c = getopt(argc, argv,
5410             "AbcCdDeEFGhiI:klLmMo:Op:PqRsSt:uU:vVx:X")) != -1) {
5411                 switch (c) {
5412                 case 'b':
5413                 case 'c':
5414                 case 'C':
5415                 case 'd':
5416                 case 'D':
5417                 case 'E':
5418                 case 'G':
5419                 case 'h':
5420                 case 'i':
5421                 case 'l':
5422                 case 'm':
5423                 case 'M':
5424                 case 'O':
5425                 case 'R':
5426                 case 's':
5427                 case 'S':
5428                 case 'u':
5429                         dump_opt[c]++;
5430                         dump_all = 0;
5431                         break;
5432                 case 'A':
5433                 case 'e':
5434                 case 'F':
5435                 case 'k':
5436                 case 'L':
5437                 case 'P':
5438                 case 'q':
5439                 case 'X':
5440                         dump_opt[c]++;
5441                         break;
5442                 /* NB: Sort single match options below. */
5443                 case 'I':
5444                         max_inflight = strtoull(optarg, NULL, 0);
5445                         if (max_inflight == 0) {
5446                                 (void) fprintf(stderr, "maximum number "
5447                                     "of inflight I/Os must be greater "
5448                                     "than 0\n");
5449                                 usage();
5450                         }
5451                         break;
5452                 case 'o':
5453                         error = set_global_var(optarg);
5454                         if (error != 0)
5455                                 usage();
5456                         break;
5457                 case 'p':
5458                         if (searchdirs == NULL) {
5459                                 searchdirs = umem_alloc(sizeof (char *),
5460                                     UMEM_NOFAIL);
5461                         } else {
5462                                 char **tmp = umem_alloc((nsearch + 1) *
5463                                     sizeof (char *), UMEM_NOFAIL);
5464                                 bcopy(searchdirs, tmp, nsearch *
5465                                     sizeof (char *));
5466                                 umem_free(searchdirs,
5467                                     nsearch * sizeof (char *));
5468                                 searchdirs = tmp;
5469                         }
5470                         searchdirs[nsearch++] = optarg;
5471                         break;
5472                 case 't':
5473                         max_txg = strtoull(optarg, NULL, 0);
5474                         if (max_txg < TXG_INITIAL) {
5475                                 (void) fprintf(stderr, "incorrect txg "
5476                                     "specified: %s\n", optarg);
5477                                 usage();
5478                         }
5479                         break;
5480                 case 'U':
5481                         spa_config_path = optarg;
5482                         if (spa_config_path[0] != '/') {
5483                                 (void) fprintf(stderr,
5484                                     "cachefile must be an absolute path "
5485                                     "(i.e. start with a slash)\n");
5486                                 usage();
5487                         }
5488                         break;
5489                 case 'v':
5490                         verbose++;
5491                         break;
5492                 case 'V':
5493                         flags = ZFS_IMPORT_VERBATIM;
5494                         break;
5495                 case 'x':
5496                         vn_dumpdir = optarg;
5497                         break;
5498                 default:
5499                         usage();
5500                         break;
5501                 }
5502         }
5503
5504         if (!dump_opt['e'] && searchdirs != NULL) {
5505                 (void) fprintf(stderr, "-p option requires use of -e\n");
5506                 usage();
5507         }
5508
5509         /*
5510          * ZDB does not typically re-read blocks; therefore limit the ARC
5511          * to 256 MB, which can be used entirely for metadata.
5512          */
5513         zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
5514
5515         /*
5516          * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
5517          * "zdb -b" uses traversal prefetch which uses async reads.
5518          * For good performance, let several of them be active at once.
5519          */
5520         zfs_vdev_async_read_max_active = 10;
5521
5522         /*
5523          * Disable reference tracking for better performance.
5524          */
5525         reference_tracking_enable = B_FALSE;
5526
5527         /*
5528          * Do not fail spa_load when spa_load_verify fails. This is needed
5529          * to load non-idle pools.
5530          */
5531         spa_load_verify_dryrun = B_TRUE;
5532
5533         kernel_init(FREAD);
5534         g_zfs = libzfs_init();
5535         if (g_zfs == NULL)
5536                 fatal("Fail to initialize zfs");
5537
5538         if (dump_all)
5539                 verbose = MAX(verbose, 1);
5540
5541         for (c = 0; c < 256; c++) {
5542                 if (dump_all && strchr("AeEFklLOPRSX", c) == NULL)
5543                         dump_opt[c] = 1;
5544                 if (dump_opt[c])
5545                         dump_opt[c] += verbose;
5546         }
5547
5548         aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
5549         zfs_recover = (dump_opt['A'] > 1);
5550
5551         argc -= optind;
5552         argv += optind;
5553
5554         if (argc < 2 && dump_opt['R'])
5555                 usage();
5556
5557         if (dump_opt['E']) {
5558                 if (argc != 1)
5559                         usage();
5560                 zdb_embedded_block(argv[0]);
5561                 return (0);
5562         }
5563
5564         if (argc < 1) {
5565                 if (!dump_opt['e'] && dump_opt['C']) {
5566                         dump_cachefile(spa_config_path);
5567                         return (0);
5568                 }
5569                 usage();
5570         }
5571
5572         if (dump_opt['l'])
5573                 return (dump_label(argv[0]));
5574
5575         if (dump_opt['O']) {
5576                 if (argc != 2)
5577                         usage();
5578                 dump_opt['v'] = verbose + 3;
5579                 return (dump_path(argv[0], argv[1]));
5580         }
5581
5582         if (dump_opt['X'] || dump_opt['F'])
5583                 rewind = ZPOOL_DO_REWIND |
5584                     (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
5585
5586         if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
5587             nvlist_add_uint64(policy, ZPOOL_LOAD_REQUEST_TXG, max_txg) != 0 ||
5588             nvlist_add_uint32(policy, ZPOOL_LOAD_REWIND_POLICY, rewind) != 0)
5589                 fatal("internal error: %s", strerror(ENOMEM));
5590
5591         error = 0;
5592         target = argv[0];
5593
5594         if (strpbrk(target, "/@") != NULL) {
5595                 size_t targetlen;
5596
5597                 target_pool = strdup(target);
5598                 *strpbrk(target_pool, "/@") = '\0';
5599
5600                 target_is_spa = B_FALSE;
5601                 targetlen = strlen(target);
5602                 if (targetlen && target[targetlen - 1] == '/')
5603                         target[targetlen - 1] = '\0';
5604         } else {
5605                 target_pool = target;
5606         }
5607
5608         if (dump_opt['e']) {
5609                 importargs_t args = { 0 };
5610
5611                 args.paths = nsearch;
5612                 args.path = searchdirs;
5613                 args.can_be_active = B_TRUE;
5614
5615                 error = zpool_tryimport(g_zfs, target_pool, &cfg, &args);
5616
5617                 if (error == 0) {
5618
5619                         if (nvlist_add_nvlist(cfg,
5620                             ZPOOL_LOAD_POLICY, policy) != 0) {
5621                                 fatal("can't open '%s': %s",
5622                                     target, strerror(ENOMEM));
5623                         }
5624
5625                         if (dump_opt['C'] > 1) {
5626                                 (void) printf("\nConfiguration for import:\n");
5627                                 dump_nvlist(cfg, 8);
5628                         }
5629
5630                         /*
5631                          * Disable the activity check to allow examination of
5632                          * active pools.
5633                          */
5634                         error = spa_import(target_pool, cfg, NULL,
5635                             flags | ZFS_IMPORT_SKIP_MMP);
5636                 }
5637         }
5638
5639         char *checkpoint_pool = NULL;
5640         char *checkpoint_target = NULL;
5641         if (dump_opt['k']) {
5642                 checkpoint_pool = import_checkpointed_state(target, cfg,
5643                     &checkpoint_target);
5644
5645                 if (checkpoint_target != NULL)
5646                         target = checkpoint_target;
5647
5648         }
5649
5650         if (error == 0) {
5651                 if (dump_opt['k'] && (target_is_spa || dump_opt['R'])) {
5652                         ASSERT(checkpoint_pool != NULL);
5653                         ASSERT(checkpoint_target == NULL);
5654
5655                         error = spa_open(checkpoint_pool, &spa, FTAG);
5656                         if (error != 0) {
5657                                 fatal("Tried to open pool \"%s\" but "
5658                                     "spa_open() failed with error %d\n",
5659                                     checkpoint_pool, error);
5660                         }
5661
5662                 } else if (target_is_spa || dump_opt['R']) {
5663                         zdb_set_skip_mmp(target);
5664                         error = spa_open_rewind(target, &spa, FTAG, policy,
5665                             NULL);
5666                         if (error) {
5667                                 /*
5668                                  * If we're missing the log device then
5669                                  * try opening the pool after clearing the
5670                                  * log state.
5671                                  */
5672                                 mutex_enter(&spa_namespace_lock);
5673                                 if ((spa = spa_lookup(target)) != NULL &&
5674                                     spa->spa_log_state == SPA_LOG_MISSING) {
5675                                         spa->spa_log_state = SPA_LOG_CLEAR;
5676                                         error = 0;
5677                                 }
5678                                 mutex_exit(&spa_namespace_lock);
5679
5680                                 if (!error) {
5681                                         error = spa_open_rewind(target, &spa,
5682                                             FTAG, policy, NULL);
5683                                 }
5684                         }
5685                 } else {
5686                         zdb_set_skip_mmp(target);
5687                         error = open_objset(target, DMU_OST_ANY, FTAG, &os);
5688                 }
5689         }
5690         nvlist_free(policy);
5691
5692         if (error)
5693                 fatal("can't open '%s': %s", target, strerror(error));
5694
5695         argv++;
5696         argc--;
5697         if (!dump_opt['R']) {
5698                 if (argc > 0) {
5699                         zopt_objects = argc;
5700                         zopt_object = calloc(zopt_objects, sizeof (uint64_t));
5701                         for (unsigned i = 0; i < zopt_objects; i++) {
5702                                 errno = 0;
5703                                 zopt_object[i] = strtoull(argv[i], NULL, 0);
5704                                 if (zopt_object[i] == 0 && errno != 0)
5705                                         fatal("bad number %s: %s",
5706                                             argv[i], strerror(errno));
5707                         }
5708                 }
5709                 if (os != NULL) {
5710                         dump_dir(os);
5711                 } else if (zopt_objects > 0 && !dump_opt['m']) {
5712                         dump_dir(spa->spa_meta_objset);
5713                 } else {
5714                         dump_zpool(spa);
5715                 }
5716         } else {
5717                 flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
5718                 flagbits['c'] = ZDB_FLAG_CHECKSUM;
5719                 flagbits['d'] = ZDB_FLAG_DECOMPRESS;
5720                 flagbits['e'] = ZDB_FLAG_BSWAP;
5721                 flagbits['g'] = ZDB_FLAG_GBH;
5722                 flagbits['i'] = ZDB_FLAG_INDIRECT;
5723                 flagbits['p'] = ZDB_FLAG_PHYS;
5724                 flagbits['r'] = ZDB_FLAG_RAW;
5725
5726                 for (int i = 0; i < argc; i++)
5727                         zdb_read_block(argv[i], spa);
5728         }
5729
5730         if (dump_opt['k']) {
5731                 free(checkpoint_pool);
5732                 if (!target_is_spa)
5733                         free(checkpoint_target);
5734         }
5735
5736         if (os != NULL)
5737                 close_objset(os, FTAG);
5738         else
5739                 spa_close(spa, FTAG);
5740
5741         fuid_table_destroy();
5742
5743         dump_debug_buffer();
5744
5745         libzfs_fini(g_zfs);
5746         kernel_fini();
5747
5748         return (error);
5749 }