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