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