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