cmd/zdb/zdb.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdio_ext.h>
  28 #include <stdlib.h>
  29 #include <ctype.h>
  30 #include <sys/zfs_context.h>
  31 #include <sys/spa.h>
  32 #include <sys/spa_impl.h>
  33 #include <sys/dmu.h>
  34 #include <sys/zap.h>
  35 #include <sys/fs/zfs.h>
  36 #include <sys/zfs_znode.h>
  37 #include <sys/vdev.h>
  38 #include <sys/vdev_impl.h>
  39 #include <sys/metaslab_impl.h>
  40 #include <sys/dmu_objset.h>
  41 #include <sys/dsl_dir.h>
  42 #include <sys/dsl_dataset.h>
  43 #include <sys/dsl_pool.h>
  44 #include <sys/dbuf.h>
  45 #include <sys/zil.h>
  46 #include <sys/zil_impl.h>
  47 #include <sys/stat.h>
  48 #include <sys/resource.h>
  49 #include <sys/dmu_traverse.h>
  50 #include <sys/zio_checksum.h>
  51 #include <sys/zio_compress.h>
  52 #include <sys/zfs_fuid.h>
  53 #include <sys/arc.h>
  54 #undef ZFS_MAXNAMELEN
  55 #undef verify
  56 #include <libzfs.h>
  57
  58 const char cmdname[] = "zdb";
  59 uint8_t dump_opt[256];
  60
  61 typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
  62
  63 extern void dump_intent_log(zilog_t *);
  64 uint64_t *zopt_object = NULL;
  65 int zopt_objects = 0;
  66 libzfs_handle_t *g_zfs;
  67 boolean_t zdb_sig_user_data = B_TRUE;
  68 int zdb_sig_cksumalg = ZIO_CHECKSUM_SHA256;
  69
  70 /*
  71  * These libumem hooks provide a reasonable set of defaults for the allocator's
  72  * debugging facilities.
  73  */
  74 const char *
  75 _umem_debug_init()
  76 {
  77         return ("default,verbose"); /* $UMEM_DEBUG setting */
  78 }
  79
  80 const char *
  81 _umem_logging_init(void)
  82 {
  83         return ("fail,contents"); /* $UMEM_LOGGING setting */
  84 }
  85
  86 static void
  87 usage(void)
  88 {
  89         (void) fprintf(stderr,
  90             "Usage: %s [-udibcsvL] [-U cachefile_path] [-t txg]\n"
  91             "\t   [-S user:cksumalg] "
  92             "dataset [object...]\n"
  93             "       %s -C [pool]\n"
  94             "       %s -l dev\n"
  95             "       %s -R pool:vdev:offset:size:flags\n"
  96             "       %s [-p path_to_vdev_dir]\n"
  97             "       %s -e pool | GUID | devid ...\n",
  98             cmdname, cmdname, cmdname, cmdname, cmdname, cmdname);
  99
 100         (void) fprintf(stderr, "        -u uberblock\n");
 101         (void) fprintf(stderr, "        -d datasets\n");
 102         (void) fprintf(stderr, "        -C cached pool configuration\n");
 103         (void) fprintf(stderr, "        -i intent logs\n");
 104         (void) fprintf(stderr, "        -b block statistics\n");
 105         (void) fprintf(stderr, "        -m metaslabs\n");
 106         (void) fprintf(stderr, "        -c checksum all metadata (twice for "
 107             "all data) blocks\n");
 108         (void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
 109         (void) fprintf(stderr, "        -S <user|all>:<cksum_alg|all> -- "
 110             "dump blkptr signatures\n");
 111         (void) fprintf(stderr, "        -v verbose (applies to all others)\n");
 112         (void) fprintf(stderr, "        -l dump label contents\n");
 113         (void) fprintf(stderr, "        -L disable leak tracking (do not "
 114             "load spacemaps)\n");
 115         (void) fprintf(stderr, "        -U cachefile_path -- use alternate "
 116             "cachefile\n");
 117         (void) fprintf(stderr, "        -R read and display block from a "
 118             "device\n");
 119         (void) fprintf(stderr, "        -e Pool is exported/destroyed/"
 120             "has altroot\n");
 121         (void) fprintf(stderr, "        -p <Path to vdev dir> (use with -e)\n");
 122         (void) fprintf(stderr, "        -t <txg> highest txg to use when "
 123             "searching for uberblocks\n");
 124         (void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
 125             "to make only that option verbose\n");
 126         (void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
 127         exit(1);
 128 }
 129
 130 /*
 131  * Called for usage errors that are discovered after a call to spa_open(),
 132  * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
 133  */
 134
 135 static void
 136 fatal(const char *fmt, ...)
 137 {
 138         va_list ap;
 139
 140         va_start(ap, fmt);
 141         (void) fprintf(stderr, "%s: ", cmdname);
 142         (void) vfprintf(stderr, fmt, ap);
 143         va_end(ap);
 144         (void) fprintf(stderr, "\n");
 145
 146         exit(1);
 147 }
 148
 149 static void
 150 dump_nvlist(nvlist_t *list, int indent)
 151 {
 152         nvpair_t *elem = NULL;
 153
 154         while ((elem = nvlist_next_nvpair(list, elem)) != NULL) {
 155                 switch (nvpair_type(elem)) {
 156                 case DATA_TYPE_STRING:
 157                         {
 158                                 char *value;
 159
 160                                 VERIFY(nvpair_value_string(elem, &value) == 0);
 161                                 (void) printf("%*s%s='%s'\n", indent, "",
 162                                     nvpair_name(elem), value);
 163                         }
 164                         break;
 165
 166                 case DATA_TYPE_UINT64:
 167                         {
 168                                 uint64_t value;
 169
 170                                 VERIFY(nvpair_value_uint64(elem, &value) == 0);
 171                                 (void) printf("%*s%s=%llu\n", indent, "",
 172                                     nvpair_name(elem), (u_longlong_t)value);
 173                         }
 174                         break;
 175
 176                 case DATA_TYPE_NVLIST:
 177                         {
 178                                 nvlist_t *value;
 179
 180                                 VERIFY(nvpair_value_nvlist(elem, &value) == 0);
 181                                 (void) printf("%*s%s\n", indent, "",
 182                                     nvpair_name(elem));
 183                                 dump_nvlist(value, indent + 4);
 184                         }
 185                         break;
 186
 187                 case DATA_TYPE_NVLIST_ARRAY:
 188                         {
 189                                 nvlist_t **value;
 190                                 uint_t c, count;
 191
 192                                 VERIFY(nvpair_value_nvlist_array(elem, &value,
 193                                     &count) == 0);
 194
 195                                 for (c = 0; c < count; c++) {
 196                                         (void) printf("%*s%s[%u]\n", indent, "",
 197                                             nvpair_name(elem), c);
 198                                         dump_nvlist(value[c], indent + 8);
 199                                 }
 200                         }
 201                         break;
 202
 203                 default:
 204
 205                         (void) printf("bad config type %d for %s\n",
 206                             nvpair_type(elem), nvpair_name(elem));
 207                 }
 208         }
 209 }
 210
 211 /* ARGSUSED */
 212 static void
 213 dump_packed_nvlist(objset_t *os, uint64_t object, void *data, size_t size)
 214 {
 215         nvlist_t *nv;
 216         size_t nvsize = *(uint64_t *)data;
 217         char *packed = umem_alloc(nvsize, UMEM_NOFAIL);
 218
 219         VERIFY(0 == dmu_read(os, object, 0, nvsize, packed, DMU_READ_PREFETCH));
 220
 221         VERIFY(nvlist_unpack(packed, nvsize, &nv, 0) == 0);
 222
 223         umem_free(packed, nvsize);
 224
 225         dump_nvlist(nv, 8);
 226
 227         nvlist_free(nv);
 228 }
 229
 230 const char dump_zap_stars[] = "****************************************";
 231 const int dump_zap_width = sizeof (dump_zap_stars) - 1;
 232
 233 static void
 234 dump_zap_histogram(uint64_t histo[ZAP_HISTOGRAM_SIZE])
 235 {
 236         int i;
 237         int minidx = ZAP_HISTOGRAM_SIZE - 1;
 238         int maxidx = 0;
 239         uint64_t max = 0;
 240
 241         for (i = 0; i < ZAP_HISTOGRAM_SIZE; i++) {
 242                 if (histo[i] > max)
 243                         max = histo[i];
 244                 if (histo[i] > 0 && i > maxidx)
 245                         maxidx = i;
 246                 if (histo[i] > 0 && i < minidx)
 247                         minidx = i;
 248         }
 249
 250         if (max < dump_zap_width)
 251                 max = dump_zap_width;
 252
 253         for (i = minidx; i <= maxidx; i++)
 254                 (void) printf("\t\t\t%u: %6llu %s\n", i, (u_longlong_t)histo[i],
 255                     &dump_zap_stars[(max - histo[i]) * dump_zap_width / max]);
 256 }
 257
 258 static void
 259 dump_zap_stats(objset_t *os, uint64_t object)
 260 {
 261         int error;
 262         zap_stats_t zs;
 263
 264         error = zap_get_stats(os, object, &zs);
 265         if (error)
 266                 return;
 267
 268         if (zs.zs_ptrtbl_len == 0) {
 269                 ASSERT(zs.zs_num_blocks == 1);
 270                 (void) printf("\tmicrozap: %llu bytes, %llu entries\n",
 271                     (u_longlong_t)zs.zs_blocksize,
 272                     (u_longlong_t)zs.zs_num_entries);
 273                 return;
 274         }
 275
 276         (void) printf("\tFat ZAP stats:\n");
 277
 278         (void) printf("\t\tPointer table:\n");
 279         (void) printf("\t\t\t%llu elements\n",
 280             (u_longlong_t)zs.zs_ptrtbl_len);
 281         (void) printf("\t\t\tzt_blk: %llu\n",
 282             (u_longlong_t)zs.zs_ptrtbl_zt_blk);
 283         (void) printf("\t\t\tzt_numblks: %llu\n",
 284             (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
 285         (void) printf("\t\t\tzt_shift: %llu\n",
 286             (u_longlong_t)zs.zs_ptrtbl_zt_shift);
 287         (void) printf("\t\t\tzt_blks_copied: %llu\n",
 288             (u_longlong_t)zs.zs_ptrtbl_blks_copied);
 289         (void) printf("\t\t\tzt_nextblk: %llu\n",
 290             (u_longlong_t)zs.zs_ptrtbl_nextblk);
 291
 292         (void) printf("\t\tZAP entries: %llu\n",
 293             (u_longlong_t)zs.zs_num_entries);
 294         (void) printf("\t\tLeaf blocks: %llu\n",
 295             (u_longlong_t)zs.zs_num_leafs);
 296         (void) printf("\t\tTotal blocks: %llu\n",
 297             (u_longlong_t)zs.zs_num_blocks);
 298         (void) printf("\t\tzap_block_type: 0x%llx\n",
 299             (u_longlong_t)zs.zs_block_type);
 300         (void) printf("\t\tzap_magic: 0x%llx\n",
 301             (u_longlong_t)zs.zs_magic);
 302         (void) printf("\t\tzap_salt: 0x%llx\n",
 303             (u_longlong_t)zs.zs_salt);
 304
 305         (void) printf("\t\tLeafs with 2^n pointers:\n");
 306         dump_zap_histogram(zs.zs_leafs_with_2n_pointers);
 307
 308         (void) printf("\t\tBlocks with n*5 entries:\n");
 309         dump_zap_histogram(zs.zs_blocks_with_n5_entries);
 310
 311         (void) printf("\t\tBlocks n/10 full:\n");
 312         dump_zap_histogram(zs.zs_blocks_n_tenths_full);
 313
 314         (void) printf("\t\tEntries with n chunks:\n");
 315         dump_zap_histogram(zs.zs_entries_using_n_chunks);
 316
 317         (void) printf("\t\tBuckets with n entries:\n");
 318         dump_zap_histogram(zs.zs_buckets_with_n_entries);
 319 }
 320
 321 /*ARGSUSED*/
 322 static void
 323 dump_none(objset_t *os, uint64_t object, void *data, size_t size)
 324 {
 325 }
 326
 327 /*ARGSUSED*/
 328 void
 329 dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
 330 {
 331 }
 332
 333 /*ARGSUSED*/
 334 static void
 335 dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
 336 {
 337 }
 338
 339 /*ARGSUSED*/
 340 static void
 341 dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
 342 {
 343         zap_cursor_t zc;
 344         zap_attribute_t attr;
 345         void *prop;
 346         int i;
 347
 348         dump_zap_stats(os, object);
 349         (void) printf("\n");
 350
 351         for (zap_cursor_init(&zc, os, object);
 352             zap_cursor_retrieve(&zc, &attr) == 0;
 353             zap_cursor_advance(&zc)) {
 354                 (void) printf("\t\t%s = ", attr.za_name);
 355                 if (attr.za_num_integers == 0) {
 356                         (void) printf("\n");
 357                         continue;
 358                 }
 359                 prop = umem_zalloc(attr.za_num_integers *
 360                     attr.za_integer_length, UMEM_NOFAIL);
 361                 (void) zap_lookup(os, object, attr.za_name,
 362                     attr.za_integer_length, attr.za_num_integers, prop);
 363                 if (attr.za_integer_length == 1) {
 364                         (void) printf("%s", (char *)prop);
 365                 } else {
 366                         for (i = 0; i < attr.za_num_integers; i++) {
 367                                 switch (attr.za_integer_length) {
 368                                 case 2:
 369                                         (void) printf("%u ",
 370                                             ((uint16_t *)prop)[i]);
 371                                         break;
 372                                 case 4:
 373                                         (void) printf("%u ",
 374                                             ((uint32_t *)prop)[i]);
 375                                         break;
 376                                 case 8:
 377                                         (void) printf("%lld ",
 378                                             (u_longlong_t)((int64_t *)prop)[i]);
 379                                         break;
 380                                 }
 381                         }
 382                 }
 383                 (void) printf("\n");
 384                 umem_free(prop, attr.za_num_integers * attr.za_integer_length);
 385         }
 386         zap_cursor_fini(&zc);
 387 }
 388
 389 /*ARGSUSED*/
 390 static void
 391 dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
 392 {
 393         zap_cursor_t zc;
 394         zap_attribute_t attr;
 395         const char *typenames[] = {
 396                 /* 0 */ "not specified",
 397                 /* 1 */ "FIFO",
 398                 /* 2 */ "Character Device",
 399                 /* 3 */ "3 (invalid)",
 400                 /* 4 */ "Directory",
 401                 /* 5 */ "5 (invalid)",
 402                 /* 6 */ "Block Device",
 403                 /* 7 */ "7 (invalid)",
 404                 /* 8 */ "Regular File",
 405                 /* 9 */ "9 (invalid)",
 406                 /* 10 */ "Symbolic Link",
 407                 /* 11 */ "11 (invalid)",
 408                 /* 12 */ "Socket",
 409                 /* 13 */ "Door",
 410                 /* 14 */ "Event Port",
 411                 /* 15 */ "15 (invalid)",
 412         };
 413
 414         dump_zap_stats(os, object);
 415         (void) printf("\n");
 416
 417         for (zap_cursor_init(&zc, os, object);
 418             zap_cursor_retrieve(&zc, &attr) == 0;
 419             zap_cursor_advance(&zc)) {
 420                 (void) printf("\t\t%s = %lld (type: %s)\n",
 421                     attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
 422                     typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
 423         }
 424         zap_cursor_fini(&zc);
 425 }
 426
 427 static void
 428 dump_spacemap(objset_t *os, space_map_obj_t *smo, space_map_t *sm)
 429 {
 430         uint64_t alloc, offset, entry;
 431         uint8_t mapshift = sm->sm_shift;
 432         uint64_t mapstart = sm->sm_start;
 433         char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
 434                             "INVALID", "INVALID", "INVALID", "INVALID" };
 435
 436         if (smo->smo_object == 0)
 437                 return;
 438
 439         /*
 440          * Print out the freelist entries in both encoded and decoded form.
 441          */
 442         alloc = 0;
 443         for (offset = 0; offset < smo->smo_objsize; offset += sizeof (entry)) {
 444                 VERIFY(0 == dmu_read(os, smo->smo_object, offset,
 445                     sizeof (entry), &entry, DMU_READ_PREFETCH));
 446                 if (SM_DEBUG_DECODE(entry)) {
 447                         (void) printf("\t\t[%4llu] %s: txg %llu, pass %llu\n",
 448                             (u_longlong_t)(offset / sizeof (entry)),
 449                             ddata[SM_DEBUG_ACTION_DECODE(entry)],
 450                             (u_longlong_t)SM_DEBUG_TXG_DECODE(entry),
 451                             (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(entry));
 452                 } else {
 453                         (void) printf("\t\t[%4llu]    %c  range:"
 454                             " %08llx-%08llx  size: %06llx\n",
 455                             (u_longlong_t)(offset / sizeof (entry)),
 456                             SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
 457                             (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
 458                             mapshift) + mapstart),
 459                             (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
 460                             mapshift) + mapstart + (SM_RUN_DECODE(entry) <<
 461                             mapshift)),
 462                             (u_longlong_t)(SM_RUN_DECODE(entry) << mapshift));
 463                         if (SM_TYPE_DECODE(entry) == SM_ALLOC)
 464                                 alloc += SM_RUN_DECODE(entry) << mapshift;
 465                         else
 466                                 alloc -= SM_RUN_DECODE(entry) << mapshift;
 467                 }
 468         }
 469         if (alloc != smo->smo_alloc) {
 470                 (void) printf("space_map_object alloc (%llu) INCONSISTENT "
 471                     "with space map summary (%llu)\n",
 472                     (u_longlong_t)smo->smo_alloc, (u_longlong_t)alloc);
 473         }
 474 }
 475
 476 static void
 477 dump_metaslab_stats(metaslab_t *msp)
 478 {
 479         char maxbuf[5];
 480         space_map_t *sm = &msp->ms_map;
 481         avl_tree_t *t = sm->sm_pp_root;
 482         int free_pct = sm->sm_space * 100 / sm->sm_size;
 483
 484         nicenum(space_map_maxsize(sm), maxbuf);
 485
 486         (void) printf("\t %20s %10lu   %7s  %6s   %4s %4d%%\n",
 487             "segments", avl_numnodes(t), "maxsize", maxbuf,
 488             "freepct", free_pct);
 489 }
 490
 491 static void
 492 dump_metaslab(metaslab_t *msp)
 493 {
 494         char freebuf[5];
 495         space_map_obj_t *smo = &msp->ms_smo;
 496         vdev_t *vd = msp->ms_group->mg_vd;
 497         spa_t *spa = vd->vdev_spa;
 498
 499         nicenum(msp->ms_map.sm_size - smo->smo_alloc, freebuf);
 500
 501         (void) printf(
 502             "\tvdev %5llu   offset %12llx   spacemap %6llu   free    %5s\n",
 503             (u_longlong_t)vd->vdev_id, (u_longlong_t)msp->ms_map.sm_start,
 504             (u_longlong_t)smo->smo_object, freebuf);
 505
 506         if (dump_opt['m'] > 1) {
 507                 mutex_enter(&msp->ms_lock);
 508                 VERIFY(space_map_load(&msp->ms_map, zfs_metaslab_ops,
 509                     SM_FREE, &msp->ms_smo, spa->spa_meta_objset) == 0);
 510                 dump_metaslab_stats(msp);
 511                 space_map_unload(&msp->ms_map);
 512                 mutex_exit(&msp->ms_lock);
 513         }
 514
 515         if (dump_opt['d'] > 5 || dump_opt['m'] > 2) {
 516                 ASSERT(msp->ms_map.sm_size == (1ULL << vd->vdev_ms_shift));
 517
 518                 mutex_enter(&msp->ms_lock);
 519                 dump_spacemap(spa->spa_meta_objset, smo, &msp->ms_map);
 520                 mutex_exit(&msp->ms_lock);
 521         }
 522
 523 }
 524
 525 static void
 526 dump_metaslabs(spa_t *spa)
 527 {
 528         vdev_t *rvd = spa->spa_root_vdev;
 529         vdev_t *vd;
 530         int c, m;
 531
 532         (void) printf("\nMetaslabs:\n");
 533
 534         for (c = 0; c < rvd->vdev_children; c++) {
 535                 vd = rvd->vdev_child[c];
 536
 537                 (void) printf("\t%-10s   %-19s   %-15s   %-10s\n",
 538                     "vdev", "offset", "spacemap", "free");
 539                 (void) printf("\t%10s   %19s   %15s   %10s\n",
 540                     "----------", "-------------------",
 541                     "---------------", "-------------");
 542
 543                 for (m = 0; m < vd->vdev_ms_count; m++)
 544                         dump_metaslab(vd->vdev_ms[m]);
 545                 (void) printf("\n");
 546         }
 547 }
 548
 549 static void
 550 dump_dtl_seg(space_map_t *sm, uint64_t start, uint64_t size)
 551 {
 552         char *prefix = (void *)sm;
 553
 554         (void) printf("%s [%llu,%llu) length %llu\n",
 555             prefix,
 556             (u_longlong_t)start,
 557             (u_longlong_t)(start + size),
 558             (u_longlong_t)(size));
 559 }
 560
 561 static void
 562 dump_dtl(vdev_t *vd, int indent)
 563 {
 564         spa_t *spa = vd->vdev_spa;
 565         boolean_t required;
 566         char *name[DTL_TYPES] = { "missing", "partial", "scrub", "outage" };
 567         char prefix[256];
 568
 569         spa_vdev_state_enter(spa);
 570         required = vdev_dtl_required(vd);
 571         (void) spa_vdev_state_exit(spa, NULL, 0);
 572
 573         if (indent == 0)
 574                 (void) printf("\nDirty time logs:\n\n");
 575
 576         (void) printf("\t%*s%s [%s]\n", indent, "",
 577             vd->vdev_path ? vd->vdev_path :
 578             vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
 579             required ? "DTL-required" : "DTL-expendable");
 580
 581         for (int t = 0; t < DTL_TYPES; t++) {
 582                 space_map_t *sm = &vd->vdev_dtl[t];
 583                 if (sm->sm_space == 0)
 584                         continue;
 585                 (void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
 586                     indent + 2, "", name[t]);
 587                 mutex_enter(sm->sm_lock);
 588                 space_map_walk(sm, dump_dtl_seg, (void *)prefix);
 589                 mutex_exit(sm->sm_lock);
 590                 if (dump_opt['d'] > 5 && vd->vdev_children == 0)
 591                         dump_spacemap(spa->spa_meta_objset,
 592                             &vd->vdev_dtl_smo, sm);
 593         }
 594
 595         for (int c = 0; c < vd->vdev_children; c++)
 596                 dump_dtl(vd->vdev_child[c], indent + 4);
 597 }
 598
 599 /*ARGSUSED*/
 600 static void
 601 dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
 602 {
 603 }
 604
 605 static uint64_t
 606 blkid2offset(const dnode_phys_t *dnp, int level, uint64_t blkid)
 607 {
 608         if (level < 0)
 609                 return (blkid);
 610
 611         return ((blkid << (level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
 612             dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
 613 }
 614
 615 static void
 616 sprintf_blkptr_compact(char *blkbuf, blkptr_t *bp, int alldvas)
 617 {
 618         dva_t *dva = bp->blk_dva;
 619         int ndvas = alldvas ? BP_GET_NDVAS(bp) : 1;
 620         int i;
 621
 622         blkbuf[0] = '\0';
 623
 624         for (i = 0; i < ndvas; i++)
 625                 (void) sprintf(blkbuf + strlen(blkbuf), "%llu:%llx:%llx ",
 626                     (u_longlong_t)DVA_GET_VDEV(&dva[i]),
 627                     (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
 628                     (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
 629
 630         (void) sprintf(blkbuf + strlen(blkbuf), "%llxL/%llxP F=%llu B=%llu",
 631             (u_longlong_t)BP_GET_LSIZE(bp),
 632             (u_longlong_t)BP_GET_PSIZE(bp),
 633             (u_longlong_t)bp->blk_fill,
 634             (u_longlong_t)bp->blk_birth);
 635 }
 636
 637 static void
 638 print_indirect(blkptr_t *bp, const zbookmark_t *zb,
 639     const dnode_phys_t *dnp)
 640 {
 641         char blkbuf[BP_SPRINTF_LEN];
 642         int l;
 643
 644         ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
 645         ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
 646
 647         (void) printf("%16llx ",
 648             (u_longlong_t)blkid2offset(dnp, zb->zb_level, zb->zb_blkid));
 649
 650         ASSERT(zb->zb_level >= 0);
 651
 652         for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
 653                 if (l == zb->zb_level) {
 654                         (void) printf("L%llx", (u_longlong_t)zb->zb_level);
 655                 } else {
 656                         (void) printf(" ");
 657                 }
 658         }
 659
 660         sprintf_blkptr_compact(blkbuf, bp, dump_opt['d'] > 5 ? 1 : 0);
 661         (void) printf("%s\n", blkbuf);
 662 }
 663
 664 #define SET_BOOKMARK(zb, objset, object, level, blkid)  \
 665 {                                                       \
 666         (zb)->zb_objset = objset;                       \
 667         (zb)->zb_object = object;                       \
 668         (zb)->zb_level = level;                         \
 669         (zb)->zb_blkid = blkid;                         \
 670 }
 671
 672 static int
 673 visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
 674     blkptr_t *bp, const zbookmark_t *zb)
 675 {
 676         int err;
 677
 678         if (bp->blk_birth == 0)
 679                 return (0);
 680
 681         print_indirect(bp, zb, dnp);
 682
 683         if (BP_GET_LEVEL(bp) > 0) {
 684                 uint32_t flags = ARC_WAIT;
 685                 int i;
 686                 blkptr_t *cbp;
 687                 int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
 688                 arc_buf_t *buf;
 689                 uint64_t fill = 0;
 690
 691                 err = arc_read_nolock(NULL, spa, bp, arc_getbuf_func, &buf,
 692                     ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
 693                 if (err)
 694                         return (err);
 695
 696                 /* recursively visit blocks below this */
 697                 cbp = buf->b_data;
 698                 for (i = 0; i < epb; i++, cbp++) {
 699                         zbookmark_t czb;
 700
 701                         SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
 702                             zb->zb_level - 1,
 703                             zb->zb_blkid * epb + i);
 704                         err = visit_indirect(spa, dnp, cbp, &czb);
 705                         if (err)
 706                                 break;
 707                         fill += cbp->blk_fill;
 708                 }
 709                 if (!err)
 710                         ASSERT3U(fill, ==, bp->blk_fill);
 711                 (void) arc_buf_remove_ref(buf, &buf);
 712         }
 713
 714         return (err);
 715 }
 716
 717 /*ARGSUSED*/
 718 static void
 719 dump_indirect(dnode_t *dn)
 720 {
 721         dnode_phys_t *dnp = dn->dn_phys;
 722         int j;
 723         zbookmark_t czb;
 724
 725         (void) printf("Indirect blocks:\n");
 726
 727         SET_BOOKMARK(&czb, dmu_objset_id(&dn->dn_objset->os),
 728             dn->dn_object, dnp->dn_nlevels - 1, 0);
 729         for (j = 0; j < dnp->dn_nblkptr; j++) {
 730                 czb.zb_blkid = j;
 731                 (void) visit_indirect(dmu_objset_spa(&dn->dn_objset->os), dnp,
 732                     &dnp->dn_blkptr[j], &czb);
 733         }
 734
 735         (void) printf("\n");
 736 }
 737
 738 /*ARGSUSED*/
 739 static void
 740 dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
 741 {
 742         dsl_dir_phys_t *dd = data;
 743         time_t crtime;
 744         char nice[6];
 745
 746         if (dd == NULL)
 747                 return;
 748
 749         ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
 750
 751         crtime = dd->dd_creation_time;
 752         (void) printf("\t\tcreation_time = %s", ctime(&crtime));
 753         (void) printf("\t\thead_dataset_obj = %llu\n",
 754             (u_longlong_t)dd->dd_head_dataset_obj);
 755         (void) printf("\t\tparent_dir_obj = %llu\n",
 756             (u_longlong_t)dd->dd_parent_obj);
 757         (void) printf("\t\torigin_obj = %llu\n",
 758             (u_longlong_t)dd->dd_origin_obj);
 759         (void) printf("\t\tchild_dir_zapobj = %llu\n",
 760             (u_longlong_t)dd->dd_child_dir_zapobj);
 761         nicenum(dd->dd_used_bytes, nice);
 762         (void) printf("\t\tused_bytes = %s\n", nice);
 763         nicenum(dd->dd_compressed_bytes, nice);
 764         (void) printf("\t\tcompressed_bytes = %s\n", nice);
 765         nicenum(dd->dd_uncompressed_bytes, nice);
 766         (void) printf("\t\tuncompressed_bytes = %s\n", nice);
 767         nicenum(dd->dd_quota, nice);
 768         (void) printf("\t\tquota = %s\n", nice);
 769         nicenum(dd->dd_reserved, nice);
 770         (void) printf("\t\treserved = %s\n", nice);
 771         (void) printf("\t\tprops_zapobj = %llu\n",
 772             (u_longlong_t)dd->dd_props_zapobj);
 773         (void) printf("\t\tdeleg_zapobj = %llu\n",
 774             (u_longlong_t)dd->dd_deleg_zapobj);
 775         (void) printf("\t\tflags = %llx\n",
 776             (u_longlong_t)dd->dd_flags);
 777
 778 #define DO(which) \
 779         nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice); \
 780         (void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
 781         DO(HEAD);
 782         DO(SNAP);
 783         DO(CHILD);
 784         DO(CHILD_RSRV);
 785         DO(REFRSRV);
 786 #undef DO
 787 }
 788
 789 /*ARGSUSED*/
 790 static void
 791 dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
 792 {
 793         dsl_dataset_phys_t *ds = data;
 794         time_t crtime;
 795         char used[6], compressed[6], uncompressed[6], unique[6];
 796         char blkbuf[BP_SPRINTF_LEN];
 797
 798         if (ds == NULL)
 799                 return;
 800
 801         ASSERT(size == sizeof (*ds));
 802         crtime = ds->ds_creation_time;
 803         nicenum(ds->ds_used_bytes, used);
 804         nicenum(ds->ds_compressed_bytes, compressed);
 805         nicenum(ds->ds_uncompressed_bytes, uncompressed);
 806         nicenum(ds->ds_unique_bytes, unique);
 807         sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ds->ds_bp);
 808
 809         (void) printf("\t\tdir_obj = %llu\n",
 810             (u_longlong_t)ds->ds_dir_obj);
 811         (void) printf("\t\tprev_snap_obj = %llu\n",
 812             (u_longlong_t)ds->ds_prev_snap_obj);
 813         (void) printf("\t\tprev_snap_txg = %llu\n",
 814             (u_longlong_t)ds->ds_prev_snap_txg);
 815         (void) printf("\t\tnext_snap_obj = %llu\n",
 816             (u_longlong_t)ds->ds_next_snap_obj);
 817         (void) printf("\t\tsnapnames_zapobj = %llu\n",
 818             (u_longlong_t)ds->ds_snapnames_zapobj);
 819         (void) printf("\t\tnum_children = %llu\n",
 820             (u_longlong_t)ds->ds_num_children);
 821         (void) printf("\t\tcreation_time = %s", ctime(&crtime));
 822         (void) printf("\t\tcreation_txg = %llu\n",
 823             (u_longlong_t)ds->ds_creation_txg);
 824         (void) printf("\t\tdeadlist_obj = %llu\n",
 825             (u_longlong_t)ds->ds_deadlist_obj);
 826         (void) printf("\t\tused_bytes = %s\n", used);
 827         (void) printf("\t\tcompressed_bytes = %s\n", compressed);
 828         (void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
 829         (void) printf("\t\tunique = %s\n", unique);
 830         (void) printf("\t\tfsid_guid = %llu\n",
 831             (u_longlong_t)ds->ds_fsid_guid);
 832         (void) printf("\t\tguid = %llu\n",
 833             (u_longlong_t)ds->ds_guid);
 834         (void) printf("\t\tflags = %llx\n",
 835             (u_longlong_t)ds->ds_flags);
 836         (void) printf("\t\tnext_clones_obj = %llu\n",
 837             (u_longlong_t)ds->ds_next_clones_obj);
 838         (void) printf("\t\tprops_obj = %llu\n",
 839             (u_longlong_t)ds->ds_props_obj);
 840         (void) printf("\t\tbp = %s\n", blkbuf);
 841 }
 842
 843 static void
 844 dump_bplist(objset_t *mos, uint64_t object, char *name)
 845 {
 846         bplist_t bpl = { 0 };
 847         blkptr_t blk, *bp = &blk;
 848         uint64_t itor = 0;
 849         char bytes[6];
 850         char comp[6];
 851         char uncomp[6];
 852
 853         if (dump_opt['d'] < 3)
 854                 return;
 855
 856         mutex_init(&bpl.bpl_lock, NULL, MUTEX_DEFAULT, NULL);
 857         VERIFY(0 == bplist_open(&bpl, mos, object));
 858         if (bplist_empty(&bpl)) {
 859                 bplist_close(&bpl);
 860                 mutex_destroy(&bpl.bpl_lock);
 861                 return;
 862         }
 863
 864         nicenum(bpl.bpl_phys->bpl_bytes, bytes);
 865         if (bpl.bpl_dbuf->db_size == sizeof (bplist_phys_t)) {
 866                 nicenum(bpl.bpl_phys->bpl_comp, comp);
 867                 nicenum(bpl.bpl_phys->bpl_uncomp, uncomp);
 868                 (void) printf("\n    %s: %llu entries, %s (%s/%s comp)\n",
 869                     name, (u_longlong_t)bpl.bpl_phys->bpl_entries,
 870                     bytes, comp, uncomp);
 871         } else {
 872                 (void) printf("\n    %s: %llu entries, %s\n",
 873                     name, (u_longlong_t)bpl.bpl_phys->bpl_entries, bytes);
 874         }
 875
 876         if (dump_opt['d'] < 5) {
 877                 bplist_close(&bpl);
 878                 mutex_destroy(&bpl.bpl_lock);
 879                 return;
 880         }
 881
 882         (void) printf("\n");
 883
 884         while (bplist_iterate(&bpl, &itor, bp) == 0) {
 885                 char blkbuf[BP_SPRINTF_LEN];
 886
 887                 ASSERT(bp->blk_birth != 0);
 888                 sprintf_blkptr_compact(blkbuf, bp, dump_opt['d'] > 5 ? 1 : 0);
 889                 (void) printf("\tItem %3llu: %s\n",
 890                     (u_longlong_t)itor - 1, blkbuf);
 891         }
 892
 893         bplist_close(&bpl);
 894         mutex_destroy(&bpl.bpl_lock);
 895 }
 896
 897 static avl_tree_t idx_tree;
 898 static avl_tree_t domain_tree;
 899 static boolean_t fuid_table_loaded;
 900
 901 static void
 902 fuid_table_destroy()
 903 {
 904         if (fuid_table_loaded) {
 905                 zfs_fuid_table_destroy(&idx_tree, &domain_tree);
 906                 fuid_table_loaded = B_FALSE;
 907         }
 908 }
 909
 910 /*
 911  * print uid or gid information.
 912  * For normal POSIX id just the id is printed in decimal format.
 913  * For CIFS files with FUID the fuid is printed in hex followed by
 914  * the doman-rid string.
 915  */
 916 static void
 917 print_idstr(uint64_t id, const char *id_type)
 918 {
 919         if (FUID_INDEX(id)) {
 920                 char *domain;
 921
 922                 domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
 923                 (void) printf("\t%s     %llx [%s-%d]\n", id_type,
 924                     (u_longlong_t)id, domain, (int)FUID_RID(id));
 925         } else {
 926                 (void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
 927         }
 928
 929 }
 930
 931 static void
 932 dump_uidgid(objset_t *os, znode_phys_t *zp)
 933 {
 934         uint32_t uid_idx, gid_idx;
 935
 936         uid_idx = FUID_INDEX(zp->zp_uid);
 937         gid_idx = FUID_INDEX(zp->zp_gid);
 938
 939         /* Load domain table, if not already loaded */
 940         if (!fuid_table_loaded && (uid_idx || gid_idx)) {
 941                 uint64_t fuid_obj;
 942
 943                 /* first find the fuid object.  It lives in the master node */
 944                 VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
 945                     8, 1, &fuid_obj) == 0);
 946                 zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
 947                 (void) zfs_fuid_table_load(os, fuid_obj,
 948                     &idx_tree, &domain_tree);
 949                 fuid_table_loaded = B_TRUE;
 950         }
 951
 952         print_idstr(zp->zp_uid, "uid");
 953         print_idstr(zp->zp_gid, "gid");
 954 }
 955
 956 /*ARGSUSED*/
 957 static void
 958 dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
 959 {
 960         znode_phys_t *zp = data;
 961         time_t z_crtime, z_atime, z_mtime, z_ctime;
 962         char path[MAXPATHLEN * 2];      /* allow for xattr and failure prefix */
 963         int error;
 964
 965         ASSERT(size >= sizeof (znode_phys_t));
 966
 967         error = zfs_obj_to_path(os, object, path, sizeof (path));
 968         if (error != 0) {
 969                 (void) snprintf(path, sizeof (path), "\?\?\?<object#%llu>",
 970                     (u_longlong_t)object);
 971         }
 972
 973         if (dump_opt['d'] < 3) {
 974                 (void) printf("\t%s\n", path);
 975                 return;
 976         }
 977
 978         z_crtime = (time_t)zp->zp_crtime[0];
 979         z_atime = (time_t)zp->zp_atime[0];
 980         z_mtime = (time_t)zp->zp_mtime[0];
 981         z_ctime = (time_t)zp->zp_ctime[0];
 982
 983         (void) printf("\tpath   %s\n", path);
 984         dump_uidgid(os, zp);
 985         (void) printf("\tatime  %s", ctime(&z_atime));
 986         (void) printf("\tmtime  %s", ctime(&z_mtime));
 987         (void) printf("\tctime  %s", ctime(&z_ctime));
 988         (void) printf("\tcrtime %s", ctime(&z_crtime));
 989         (void) printf("\tgen    %llu\n", (u_longlong_t)zp->zp_gen);
 990         (void) printf("\tmode   %llo\n", (u_longlong_t)zp->zp_mode);
 991         (void) printf("\tsize   %llu\n", (u_longlong_t)zp->zp_size);
 992         (void) printf("\tparent %llu\n", (u_longlong_t)zp->zp_parent);
 993         (void) printf("\tlinks  %llu\n", (u_longlong_t)zp->zp_links);
 994         (void) printf("\txattr  %llu\n", (u_longlong_t)zp->zp_xattr);
 995         (void) printf("\trdev   0x%016llx\n", (u_longlong_t)zp->zp_rdev);
 996 }
 997
 998 /*ARGSUSED*/
 999 static void
1000 dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
1001 {
1002 }
1003
1004 /*ARGSUSED*/
1005 static void
1006 dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
1007 {
1008 }
1009
1010 static object_viewer_t *object_viewer[DMU_OT_NUMTYPES] = {
1011         dump_none,              /* unallocated                  */
1012         dump_zap,               /* object directory             */
1013         dump_uint64,            /* object array                 */
1014         dump_none,              /* packed nvlist                */
1015         dump_packed_nvlist,     /* packed nvlist size           */
1016         dump_none,              /* bplist                       */
1017         dump_none,              /* bplist header                */
1018         dump_none,              /* SPA space map header         */
1019         dump_none,              /* SPA space map                */
1020         dump_none,              /* ZIL intent log               */
1021         dump_dnode,             /* DMU dnode                    */
1022         dump_dmu_objset,        /* DMU objset                   */
1023         dump_dsl_dir,           /* DSL directory                */
1024         dump_zap,               /* DSL directory child map      */
1025         dump_zap,               /* DSL dataset snap map         */
1026         dump_zap,               /* DSL props                    */
1027         dump_dsl_dataset,       /* DSL dataset                  */
1028         dump_znode,             /* ZFS znode                    */
1029         dump_acl,               /* ZFS V0 ACL                   */
1030         dump_uint8,             /* ZFS plain file               */
1031         dump_zpldir,            /* ZFS directory                */
1032         dump_zap,               /* ZFS master node              */
1033         dump_zap,               /* ZFS delete queue             */
1034         dump_uint8,             /* zvol object                  */
1035         dump_zap,               /* zvol prop                    */
1036         dump_uint8,             /* other uint8[]                */
1037         dump_uint64,            /* other uint64[]               */
1038         dump_zap,               /* other ZAP                    */
1039         dump_zap,               /* persistent error log         */
1040         dump_uint8,             /* SPA history                  */
1041         dump_uint64,            /* SPA history offsets          */
1042         dump_zap,               /* Pool properties              */
1043         dump_zap,               /* DSL permissions              */
1044         dump_acl,               /* ZFS ACL                      */
1045         dump_uint8,             /* ZFS SYSACL                   */
1046         dump_none,              /* FUID nvlist                  */
1047         dump_packed_nvlist,     /* FUID nvlist size             */
1048         dump_zap,               /* DSL dataset next clones      */
1049         dump_zap,               /* DSL scrub queue              */
1050         dump_zap,               /* ZFS user/group used          */
1051         dump_zap,               /* ZFS user/group quota         */
1052 };
1053
1054 static void
1055 dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
1056 {
1057         dmu_buf_t *db = NULL;
1058         dmu_object_info_t doi;
1059         dnode_t *dn;
1060         void *bonus = NULL;
1061         size_t bsize = 0;
1062         char iblk[6], dblk[6], lsize[6], asize[6], bonus_size[6], segsize[6];
1063         char aux[50];
1064         int error;
1065
1066         if (*print_header) {
1067                 (void) printf("\n    Object  lvl   iblk   dblk  lsize"
1068                     "  asize  type\n");
1069                 *print_header = 0;
1070         }
1071
1072         if (object == 0) {
1073                 dn = os->os->os_meta_dnode;
1074         } else {
1075                 error = dmu_bonus_hold(os, object, FTAG, &db);
1076                 if (error)
1077                         fatal("dmu_bonus_hold(%llu) failed, errno %u",
1078                             object, error);
1079                 bonus = db->db_data;
1080                 bsize = db->db_size;
1081                 dn = ((dmu_buf_impl_t *)db)->db_dnode;
1082         }
1083         dmu_object_info_from_dnode(dn, &doi);
1084
1085         nicenum(doi.doi_metadata_block_size, iblk);
1086         nicenum(doi.doi_data_block_size, dblk);
1087         nicenum(doi.doi_data_block_size * (doi.doi_max_block_offset + 1),
1088             lsize);
1089         nicenum(doi.doi_physical_blks << 9, asize);
1090         nicenum(doi.doi_bonus_size, bonus_size);
1091
1092         aux[0] = '\0';
1093
1094         if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
1095                 (void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
1096                     zio_checksum_table[doi.doi_checksum].ci_name);
1097         }
1098
1099         if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
1100                 (void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
1101                     zio_compress_table[doi.doi_compress].ci_name);
1102         }
1103
1104         (void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %s%s\n",
1105             (u_longlong_t)object, doi.doi_indirection, iblk, dblk, lsize,
1106             asize, dmu_ot[doi.doi_type].ot_name, aux);
1107
1108         if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
1109                 (void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %s\n",
1110                     "", "", "", "", bonus_size, "bonus",
1111                     dmu_ot[doi.doi_bonus_type].ot_name);
1112         }
1113
1114         if (verbosity >= 4) {
1115                 (void) printf("\tdnode flags: %s%s\n",
1116                     (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
1117                     "USED_BYTES " : "",
1118                     (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
1119                     "USERUSED_ACCOUNTED " : "");
1120                 (void) printf("\tdnode maxblkid: %llu\n",
1121                     (longlong_t)dn->dn_phys->dn_maxblkid);
1122
1123                 object_viewer[doi.doi_bonus_type](os, object, bonus, bsize);
1124                 object_viewer[doi.doi_type](os, object, NULL, 0);
1125                 *print_header = 1;
1126         }
1127
1128         if (verbosity >= 5)
1129                 dump_indirect(dn);
1130
1131         if (verbosity >= 5) {
1132                 /*
1133                  * Report the list of segments that comprise the object.
1134                  */
1135                 uint64_t start = 0;
1136                 uint64_t end;
1137                 uint64_t blkfill = 1;
1138                 int minlvl = 1;
1139
1140                 if (dn->dn_type == DMU_OT_DNODE) {
1141                         minlvl = 0;
1142                         blkfill = DNODES_PER_BLOCK;
1143                 }
1144
1145                 for (;;) {
1146                         error = dnode_next_offset(dn,
1147                             0, &start, minlvl, blkfill, 0);
1148                         if (error)
1149                                 break;
1150                         end = start;
1151                         error = dnode_next_offset(dn,
1152                             DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
1153                         nicenum(end - start, segsize);
1154                         (void) printf("\t\tsegment [%016llx, %016llx)"
1155                             " size %5s\n", (u_longlong_t)start,
1156                             (u_longlong_t)end, segsize);
1157                         if (error)
1158                                 break;
1159                         start = end;
1160                 }
1161         }
1162
1163         if (db != NULL)
1164                 dmu_buf_rele(db, FTAG);
1165 }
1166
1167 static char *objset_types[DMU_OST_NUMTYPES] = {
1168         "NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1169
1170 static void
1171 dump_dir(objset_t *os)
1172 {
1173         dmu_objset_stats_t dds;
1174         uint64_t object, object_count;
1175         uint64_t refdbytes, usedobjs, scratch;
1176         char numbuf[8];
1177         char blkbuf[BP_SPRINTF_LEN + 20];
1178         char osname[MAXNAMELEN];
1179         char *type = "UNKNOWN";
1180         int verbosity = dump_opt['d'];
1181         int print_header = 1;
1182         int i, error;
1183
1184         dmu_objset_fast_stat(os, &dds);
1185
1186         if (dds.dds_type < DMU_OST_NUMTYPES)
1187                 type = objset_types[dds.dds_type];
1188
1189         if (dds.dds_type == DMU_OST_META) {
1190                 dds.dds_creation_txg = TXG_INITIAL;
1191                 usedobjs = os->os->os_rootbp->blk_fill;
1192                 refdbytes = os->os->os_spa->spa_dsl_pool->
1193                     dp_mos_dir->dd_phys->dd_used_bytes;
1194         } else {
1195                 dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
1196         }
1197
1198         ASSERT3U(usedobjs, ==, os->os->os_rootbp->blk_fill);
1199
1200         nicenum(refdbytes, numbuf);
1201
1202         if (verbosity >= 4) {
1203                 (void) sprintf(blkbuf + strlen(blkbuf), ", rootbp ");
1204                 (void) sprintf_blkptr(blkbuf + strlen(blkbuf),
1205                     BP_SPRINTF_LEN - strlen(blkbuf), os->os->os_rootbp);
1206         } else {
1207                 blkbuf[0] = '\0';
1208         }
1209
1210         dmu_objset_name(os, osname);
1211
1212         (void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
1213             "%s, %llu objects%s\n",
1214             osname, type, (u_longlong_t)dmu_objset_id(os),
1215             (u_longlong_t)dds.dds_creation_txg,
1216             numbuf, (u_longlong_t)usedobjs, blkbuf);
1217
1218         dump_intent_log(dmu_objset_zil(os));
1219
1220         if (dmu_objset_ds(os) != NULL)
1221                 dump_bplist(dmu_objset_pool(os)->dp_meta_objset,
1222                     dmu_objset_ds(os)->ds_phys->ds_deadlist_obj, "Deadlist");
1223
1224         if (verbosity < 2)
1225                 return;
1226
1227         if (os->os->os_rootbp->blk_birth == 0)
1228                 return;
1229
1230         if (zopt_objects != 0) {
1231                 for (i = 0; i < zopt_objects; i++)
1232                         dump_object(os, zopt_object[i], verbosity,
1233                             &print_header);
1234                 (void) printf("\n");
1235                 return;
1236         }
1237
1238         dump_object(os, 0, verbosity, &print_header);
1239         object_count = 0;
1240         if (os->os->os_userused_dnode &&
1241             os->os->os_userused_dnode->dn_type != 0) {
1242                 dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header);
1243                 dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header);
1244         }
1245
1246         object = 0;
1247         while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
1248                 dump_object(os, object, verbosity, &print_header);
1249                 object_count++;
1250         }
1251
1252         ASSERT3U(object_count, ==, usedobjs);
1253
1254         (void) printf("\n");
1255
1256         if (error != ESRCH) {
1257                 (void) fprintf(stderr, "dmu_object_next() = %d\n", error);
1258                 abort();
1259         }
1260 }
1261
1262 static void
1263 dump_uberblock(uberblock_t *ub)
1264 {
1265         time_t timestamp = ub->ub_timestamp;
1266
1267         (void) printf("Uberblock\n\n");
1268         (void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1269         (void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1270         (void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1271         (void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1272         (void) printf("\ttimestamp = %llu UTC = %s",
1273             (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1274         if (dump_opt['u'] >= 3) {
1275                 char blkbuf[BP_SPRINTF_LEN];
1276                 sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &ub->ub_rootbp);
1277                 (void) printf("\trootbp = %s\n", blkbuf);
1278         }
1279         (void) printf("\n");
1280 }
1281
1282 static void
1283 dump_config(const char *pool)
1284 {
1285         spa_t *spa = NULL;
1286
1287         mutex_enter(&spa_namespace_lock);
1288         while ((spa = spa_next(spa)) != NULL) {
1289                 if (pool == NULL)
1290                         (void) printf("%s\n", spa_name(spa));
1291                 if (pool == NULL || strcmp(pool, spa_name(spa)) == 0)
1292                         dump_nvlist(spa->spa_config, 4);
1293         }
1294         mutex_exit(&spa_namespace_lock);
1295 }
1296
1297 static void
1298 dump_cachefile(const char *cachefile)
1299 {
1300         int fd;
1301         struct stat64 statbuf;
1302         char *buf;
1303         nvlist_t *config;
1304
1305         if ((fd = open64(cachefile, O_RDONLY)) < 0) {
1306                 (void) printf("cannot open '%s': %s\n", cachefile,
1307                     strerror(errno));
1308                 exit(1);
1309         }
1310
1311         if (fstat64(fd, &statbuf) != 0) {
1312                 (void) printf("failed to stat '%s': %s\n", cachefile,
1313                     strerror(errno));
1314                 exit(1);
1315         }
1316
1317         if ((buf = malloc(statbuf.st_size)) == NULL) {
1318                 (void) fprintf(stderr, "failed to allocate %llu bytes\n",
1319                     (u_longlong_t)statbuf.st_size);
1320                 exit(1);
1321         }
1322
1323         if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
1324                 (void) fprintf(stderr, "failed to read %llu bytes\n",
1325                     (u_longlong_t)statbuf.st_size);
1326                 exit(1);
1327         }
1328
1329         (void) close(fd);
1330
1331         if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
1332                 (void) fprintf(stderr, "failed to unpack nvlist\n");
1333                 exit(1);
1334         }
1335
1336         free(buf);
1337
1338         dump_nvlist(config, 0);
1339
1340         nvlist_free(config);
1341 }
1342
1343 static void
1344 dump_label(const char *dev)
1345 {
1346         int fd;
1347         vdev_label_t label;
1348         char *buf = label.vl_vdev_phys.vp_nvlist;
1349         size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
1350         struct stat64 statbuf;
1351         uint64_t psize;
1352         int l;
1353
1354         if ((fd = open64(dev, O_RDONLY)) < 0) {
1355                 (void) printf("cannot open '%s': %s\n", dev, strerror(errno));
1356                 exit(1);
1357         }
1358
1359         if (fstat64(fd, &statbuf) != 0) {
1360                 (void) printf("failed to stat '%s': %s\n", dev,
1361                     strerror(errno));
1362                 exit(1);
1363         }
1364
1365         psize = statbuf.st_size;
1366         psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
1367
1368         for (l = 0; l < VDEV_LABELS; l++) {
1369
1370                 nvlist_t *config = NULL;
1371
1372                 (void) printf("--------------------------------------------\n");
1373                 (void) printf("LABEL %d\n", l);
1374                 (void) printf("--------------------------------------------\n");
1375
1376                 if (pread64(fd, &label, sizeof (label),
1377                     vdev_label_offset(psize, l, 0)) != sizeof (label)) {
1378                         (void) printf("failed to read label %d\n", l);
1379                         continue;
1380                 }
1381
1382                 if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
1383                         (void) printf("failed to unpack label %d\n", l);
1384                         continue;
1385                 }
1386                 dump_nvlist(config, 4);
1387                 nvlist_free(config);
1388         }
1389 }
1390
1391 /*ARGSUSED*/
1392 static int
1393 dump_one_dir(char *dsname, void *arg)
1394 {
1395         int error;
1396         objset_t *os;
1397
1398         error = dmu_objset_open(dsname, DMU_OST_ANY,
1399             DS_MODE_USER | DS_MODE_READONLY, &os);
1400         if (error) {
1401                 (void) printf("Could not open %s\n", dsname);
1402                 return (0);
1403         }
1404         dump_dir(os);
1405         dmu_objset_close(os);
1406         fuid_table_destroy();
1407         return (0);
1408 }
1409
1410 static void
1411 zdb_leak(space_map_t *sm, uint64_t start, uint64_t size)
1412 {
1413         vdev_t *vd = sm->sm_ppd;
1414
1415         (void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
1416             (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
1417 }
1418
1419 /* ARGSUSED */
1420 static void
1421 zdb_space_map_load(space_map_t *sm)
1422 {
1423 }
1424
1425 static void
1426 zdb_space_map_unload(space_map_t *sm)
1427 {
1428         space_map_vacate(sm, zdb_leak, sm);
1429 }
1430
1431 /* ARGSUSED */
1432 static void
1433 zdb_space_map_claim(space_map_t *sm, uint64_t start, uint64_t size)
1434 {
1435 }
1436
1437 static space_map_ops_t zdb_space_map_ops = {
1438         zdb_space_map_load,
1439         zdb_space_map_unload,
1440         NULL,   /* alloc */
1441         zdb_space_map_claim,
1442         NULL,   /* free */
1443         NULL    /* maxsize */
1444 };
1445
1446 static void
1447 zdb_leak_init(spa_t *spa)
1448 {
1449         vdev_t *rvd = spa->spa_root_vdev;
1450
1451         for (int c = 0; c < rvd->vdev_children; c++) {
1452                 vdev_t *vd = rvd->vdev_child[c];
1453                 for (int m = 0; m < vd->vdev_ms_count; m++) {
1454                         metaslab_t *msp = vd->vdev_ms[m];
1455                         mutex_enter(&msp->ms_lock);
1456                         VERIFY(space_map_load(&msp->ms_map, &zdb_space_map_ops,
1457                             SM_ALLOC, &msp->ms_smo, spa->spa_meta_objset) == 0);
1458                         msp->ms_map.sm_ppd = vd;
1459                         mutex_exit(&msp->ms_lock);
1460                 }
1461         }
1462 }
1463
1464 static void
1465 zdb_leak_fini(spa_t *spa)
1466 {
1467         vdev_t *rvd = spa->spa_root_vdev;
1468
1469         for (int c = 0; c < rvd->vdev_children; c++) {
1470                 vdev_t *vd = rvd->vdev_child[c];
1471                 for (int m = 0; m < vd->vdev_ms_count; m++) {
1472                         metaslab_t *msp = vd->vdev_ms[m];
1473                         mutex_enter(&msp->ms_lock);
1474                         space_map_unload(&msp->ms_map);
1475                         mutex_exit(&msp->ms_lock);
1476                 }
1477         }
1478 }
1479
1480 /*
1481  * Verify that the sum of the sizes of all blocks in the pool adds up
1482  * to the SPA's sa_alloc total.
1483  */
1484 typedef struct zdb_blkstats {
1485         uint64_t        zb_asize;
1486         uint64_t        zb_lsize;
1487         uint64_t        zb_psize;
1488         uint64_t        zb_count;
1489 } zdb_blkstats_t;
1490
1491 #define DMU_OT_DEFERRED DMU_OT_NONE
1492 #define DMU_OT_TOTAL    DMU_OT_NUMTYPES
1493
1494 #define ZB_TOTAL        DN_MAX_LEVELS
1495
1496 typedef struct zdb_cb {
1497         zdb_blkstats_t  zcb_type[ZB_TOTAL + 1][DMU_OT_TOTAL + 1];
1498         uint64_t        zcb_errors[256];
1499         int             zcb_readfails;
1500         int             zcb_haderrors;
1501 } zdb_cb_t;
1502
1503 static void
1504 zdb_count_block(spa_t *spa, zdb_cb_t *zcb, blkptr_t *bp, dmu_object_type_t type)
1505 {
1506         for (int i = 0; i < 4; i++) {
1507                 int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
1508                 int t = (i & 1) ? type : DMU_OT_TOTAL;
1509                 zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
1510
1511                 zb->zb_asize += BP_GET_ASIZE(bp);
1512                 zb->zb_lsize += BP_GET_LSIZE(bp);
1513                 zb->zb_psize += BP_GET_PSIZE(bp);
1514                 zb->zb_count++;
1515         }
1516
1517         if (dump_opt['S']) {
1518                 boolean_t print_sig;
1519
1520                 print_sig = !zdb_sig_user_data || (BP_GET_LEVEL(bp) == 0 &&
1521                     BP_GET_TYPE(bp) == DMU_OT_PLAIN_FILE_CONTENTS);
1522
1523                 if (BP_GET_CHECKSUM(bp) < zdb_sig_cksumalg)
1524                         print_sig = B_FALSE;
1525
1526                 if (print_sig) {
1527                         (void) printf("%llu\t%lld\t%lld\t%s\t%s\t%s\t"
1528                             "%llx:%llx:%llx:%llx\n",
1529                             (u_longlong_t)BP_GET_LEVEL(bp),
1530                             (longlong_t)BP_GET_PSIZE(bp),
1531                             (longlong_t)BP_GET_NDVAS(bp),
1532                             dmu_ot[BP_GET_TYPE(bp)].ot_name,
1533                             zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name,
1534                             zio_compress_table[BP_GET_COMPRESS(bp)].ci_name,
1535                             (u_longlong_t)bp->blk_cksum.zc_word[0],
1536                             (u_longlong_t)bp->blk_cksum.zc_word[1],
1537                             (u_longlong_t)bp->blk_cksum.zc_word[2],
1538                             (u_longlong_t)bp->blk_cksum.zc_word[3]);
1539                 }
1540         }
1541
1542         if (!dump_opt['L'])
1543                 VERIFY(zio_wait(zio_claim(NULL, spa, spa_first_txg(spa), bp,
1544                     NULL, NULL, ZIO_FLAG_MUSTSUCCEED)) == 0);
1545 }
1546
1547 static int
1548 zdb_blkptr_cb(spa_t *spa, blkptr_t *bp, const zbookmark_t *zb,
1549     const dnode_phys_t *dnp, void *arg)
1550 {
1551         zdb_cb_t *zcb = arg;
1552         char blkbuf[BP_SPRINTF_LEN];
1553         dmu_object_type_t type;
1554         boolean_t is_l0_metadata;
1555
1556         if (bp == NULL)
1557                 return (0);
1558
1559         type = BP_GET_TYPE(bp);
1560
1561         zdb_count_block(spa, zcb, bp, type);
1562
1563         /*
1564          * if we do metadata-only checksumming there's no need to checksum
1565          * indirect blocks here because it is done during traverse
1566          */
1567         is_l0_metadata = (BP_GET_LEVEL(bp) == 0 && type < DMU_OT_NUMTYPES &&
1568             dmu_ot[type].ot_metadata);
1569
1570         if (dump_opt['c'] > 1 || dump_opt['S'] ||
1571             (dump_opt['c'] && is_l0_metadata)) {
1572                 int ioerr, size;
1573                 void *data;
1574
1575                 size = BP_GET_LSIZE(bp);
1576                 data = malloc(size);
1577                 ioerr = zio_wait(zio_read(NULL, spa, bp, data, size,
1578                     NULL, NULL, ZIO_PRIORITY_ASYNC_READ,
1579                     ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB, zb));
1580                 free(data);
1581
1582                 /* We expect io errors on intent log */
1583                 if (ioerr && type != DMU_OT_INTENT_LOG) {
1584                         zcb->zcb_haderrors = 1;
1585                         zcb->zcb_errors[ioerr]++;
1586
1587                         if (dump_opt['b'] >= 2)
1588                                 sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1589                         else
1590                                 blkbuf[0] = '\0';
1591
1592                         if (!dump_opt['S']) {
1593                                 (void) printf("zdb_blkptr_cb: "
1594                                     "Got error %d reading "
1595                                     "<%llu, %llu, %lld, %llx> %s -- skipping\n",
1596                                     ioerr,
1597                                     (u_longlong_t)zb->zb_objset,
1598                                     (u_longlong_t)zb->zb_object,
1599                                     (u_longlong_t)zb->zb_level,
1600                                     (u_longlong_t)zb->zb_blkid,
1601                                     blkbuf);
1602                         }
1603                 }
1604         }
1605
1606         zcb->zcb_readfails = 0;
1607
1608         if (dump_opt['b'] >= 4) {
1609                 sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, bp);
1610                 (void) printf("objset %llu object %llu offset 0x%llx %s\n",
1611                     (u_longlong_t)zb->zb_objset,
1612                     (u_longlong_t)zb->zb_object,
1613                     (u_longlong_t)blkid2offset(dnp, zb->zb_level, zb->zb_blkid),
1614                     blkbuf);
1615         }
1616
1617         return (0);
1618 }
1619
1620 static int
1621 dump_block_stats(spa_t *spa)
1622 {
1623         zdb_cb_t zcb = { 0 };
1624         zdb_blkstats_t *zb, *tzb;
1625         uint64_t alloc, space, logalloc;
1626         vdev_t *rvd = spa->spa_root_vdev;
1627         int leaks = 0;
1628         int c, e;
1629
1630         if (!dump_opt['S']) {
1631                 (void) printf("\nTraversing all blocks %s%s%s%s%s...\n",
1632                     (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
1633                     (dump_opt['c'] == 1) ? "metadata " : "",
1634                     dump_opt['c'] ? "checksums " : "",
1635                     (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
1636                     !dump_opt['L'] ? "nothing leaked " : "");
1637         }
1638
1639         /*
1640          * Load all space maps as SM_ALLOC maps, then traverse the pool
1641          * claiming each block we discover.  If the pool is perfectly
1642          * consistent, the space maps will be empty when we're done.
1643          * Anything left over is a leak; any block we can't claim (because
1644          * it's not part of any space map) is a double allocation,
1645          * reference to a freed block, or an unclaimed log block.
1646          */
1647         if (!dump_opt['L'])
1648                 zdb_leak_init(spa);
1649
1650         /*
1651          * If there's a deferred-free bplist, process that first.
1652          */
1653         if (spa->spa_sync_bplist_obj != 0) {
1654                 bplist_t *bpl = &spa->spa_sync_bplist;
1655                 blkptr_t blk;
1656                 uint64_t itor = 0;
1657
1658                 VERIFY(0 == bplist_open(bpl, spa->spa_meta_objset,
1659                     spa->spa_sync_bplist_obj));
1660
1661                 while (bplist_iterate(bpl, &itor, &blk) == 0) {
1662                         if (dump_opt['b'] >= 4) {
1663                                 char blkbuf[BP_SPRINTF_LEN];
1664                                 sprintf_blkptr(blkbuf, BP_SPRINTF_LEN, &blk);
1665                                 (void) printf("[%s] %s\n",
1666                                     "deferred free", blkbuf);
1667                         }
1668                         zdb_count_block(spa, &zcb, &blk, DMU_OT_DEFERRED);
1669                 }
1670
1671                 bplist_close(bpl);
1672         }
1673
1674         zcb.zcb_haderrors |= traverse_pool(spa, zdb_blkptr_cb, &zcb);
1675
1676         if (zcb.zcb_haderrors && !dump_opt['S']) {
1677                 (void) printf("\nError counts:\n\n");
1678                 (void) printf("\t%5s  %s\n", "errno", "count");
1679                 for (e = 0; e < 256; e++) {
1680                         if (zcb.zcb_errors[e] != 0) {
1681                                 (void) printf("\t%5d  %llu\n",
1682                                     e, (u_longlong_t)zcb.zcb_errors[e]);
1683                         }
1684                 }
1685         }
1686
1687         /*
1688          * Report any leaked segments.
1689          */
1690         if (!dump_opt['L'])
1691                 zdb_leak_fini(spa);
1692
1693         /*
1694          * If we're interested in printing out the blkptr signatures,
1695          * return now as we don't print out anything else (including
1696          * errors and leaks).
1697          */
1698         if (dump_opt['S'])
1699                 return (zcb.zcb_haderrors ? 3 : 0);
1700
1701         alloc = spa_get_alloc(spa);
1702         space = spa_get_space(spa);
1703
1704         /*
1705          * Log blocks allocated from a separate log device don't count
1706          * as part of the normal pool space; factor them in here.
1707          */
1708         logalloc = 0;
1709
1710         for (c = 0; c < rvd->vdev_children; c++)
1711                 if (rvd->vdev_child[c]->vdev_islog)
1712                         logalloc += rvd->vdev_child[c]->vdev_stat.vs_alloc;
1713
1714         tzb = &zcb.zcb_type[ZB_TOTAL][DMU_OT_TOTAL];
1715
1716         if (tzb->zb_asize == alloc + logalloc) {
1717                 if (!dump_opt['L'])
1718                         (void) printf("\n\tNo leaks (block sum matches space"
1719                             " maps exactly)\n");
1720         } else {
1721                 (void) printf("block traversal size %llu != alloc %llu "
1722                     "(%s %lld)\n",
1723                     (u_longlong_t)tzb->zb_asize,
1724                     (u_longlong_t)alloc + logalloc,
1725                     (dump_opt['L']) ? "unreachable" : "leaked",
1726                     (longlong_t)(alloc + logalloc - tzb->zb_asize));
1727                 leaks = 1;
1728         }
1729
1730         if (tzb->zb_count == 0)
1731                 return (2);
1732
1733         (void) printf("\n");
1734         (void) printf("\tbp count:      %10llu\n",
1735             (u_longlong_t)tzb->zb_count);
1736         (void) printf("\tbp logical:    %10llu\t avg: %6llu\n",
1737             (u_longlong_t)tzb->zb_lsize,
1738             (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
1739         (void) printf("\tbp physical:   %10llu\t avg:"
1740             " %6llu\tcompression: %6.2f\n",
1741             (u_longlong_t)tzb->zb_psize,
1742             (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
1743             (double)tzb->zb_lsize / tzb->zb_psize);
1744         (void) printf("\tbp allocated:  %10llu\t avg:"
1745             " %6llu\tcompression: %6.2f\n",
1746             (u_longlong_t)tzb->zb_asize,
1747             (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
1748             (double)tzb->zb_lsize / tzb->zb_asize);
1749         (void) printf("\tSPA allocated: %10llu\tused: %5.2f%%\n",
1750             (u_longlong_t)alloc, 100.0 * alloc / space);
1751
1752         if (dump_opt['b'] >= 2) {
1753                 int l, t, level;
1754                 (void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
1755                     "\t  avg\t comp\t%%Total\tType\n");
1756
1757                 for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
1758                         char csize[6], lsize[6], psize[6], asize[6], avg[6];
1759                         char *typename;
1760
1761                         typename = t == DMU_OT_DEFERRED ? "deferred free" :
1762                             t == DMU_OT_TOTAL ? "Total" : dmu_ot[t].ot_name;
1763
1764                         if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
1765                                 (void) printf("%6s\t%5s\t%5s\t%5s"
1766                                     "\t%5s\t%5s\t%6s\t%s\n",
1767                                     "-",
1768                                     "-",
1769                                     "-",
1770                                     "-",
1771                                     "-",
1772                                     "-",
1773                                     "-",
1774                                     typename);
1775                                 continue;
1776                         }
1777
1778                         for (l = ZB_TOTAL - 1; l >= -1; l--) {
1779                                 level = (l == -1 ? ZB_TOTAL : l);
1780                                 zb = &zcb.zcb_type[level][t];
1781
1782                                 if (zb->zb_asize == 0)
1783                                         continue;
1784
1785                                 if (dump_opt['b'] < 3 && level != ZB_TOTAL)
1786                                         continue;
1787
1788                                 if (level == 0 && zb->zb_asize ==
1789                                     zcb.zcb_type[ZB_TOTAL][t].zb_asize)
1790                                         continue;
1791
1792                                 nicenum(zb->zb_count, csize);
1793                                 nicenum(zb->zb_lsize, lsize);
1794                                 nicenum(zb->zb_psize, psize);
1795                                 nicenum(zb->zb_asize, asize);
1796                                 nicenum(zb->zb_asize / zb->zb_count, avg);
1797
1798                                 (void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
1799                                     "\t%5.2f\t%6.2f\t",
1800                                     csize, lsize, psize, asize, avg,
1801                                     (double)zb->zb_lsize / zb->zb_psize,
1802                                     100.0 * zb->zb_asize / tzb->zb_asize);
1803
1804                                 if (level == ZB_TOTAL)
1805                                         (void) printf("%s\n", typename);
1806                                 else
1807                                         (void) printf("    L%d %s\n",
1808                                             level, typename);
1809                         }
1810                 }
1811         }
1812
1813         (void) printf("\n");
1814
1815         if (leaks)
1816                 return (2);
1817
1818         if (zcb.zcb_haderrors)
1819                 return (3);
1820
1821         return (0);
1822 }
1823
1824 static void
1825 dump_zpool(spa_t *spa)
1826 {
1827         dsl_pool_t *dp = spa_get_dsl(spa);
1828         int rc = 0;
1829
1830         if (dump_opt['u'])
1831                 dump_uberblock(&spa->spa_uberblock);
1832
1833         if (dump_opt['d'] || dump_opt['i'] || dump_opt['m']) {
1834                 dump_dir(dp->dp_meta_objset);
1835                 if (dump_opt['d'] >= 3) {
1836                         dump_bplist(dp->dp_meta_objset,
1837                             spa->spa_sync_bplist_obj, "Deferred frees");
1838                         dump_dtl(spa->spa_root_vdev, 0);
1839                 }
1840
1841                 if (dump_opt['d'] >= 3 || dump_opt['m'])
1842                         dump_metaslabs(spa);
1843
1844                 (void) dmu_objset_find(spa_name(spa), dump_one_dir, NULL,
1845                     DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
1846         }
1847
1848         if (dump_opt['b'] || dump_opt['c'] || dump_opt['S'])
1849                 rc = dump_block_stats(spa);
1850
1851         if (dump_opt['s'])
1852                 show_pool_stats(spa);
1853
1854         if (rc != 0)
1855                 exit(rc);
1856 }
1857
1858 #define ZDB_FLAG_CHECKSUM       0x0001
1859 #define ZDB_FLAG_DECOMPRESS     0x0002
1860 #define ZDB_FLAG_BSWAP          0x0004
1861 #define ZDB_FLAG_GBH            0x0008
1862 #define ZDB_FLAG_INDIRECT       0x0010
1863 #define ZDB_FLAG_PHYS           0x0020
1864 #define ZDB_FLAG_RAW            0x0040
1865 #define ZDB_FLAG_PRINT_BLKPTR   0x0080
1866
1867 int flagbits[256];
1868
1869 static void
1870 zdb_print_blkptr(blkptr_t *bp, int flags)
1871 {
1872         dva_t *dva = bp->blk_dva;
1873         int d;
1874
1875         if (flags & ZDB_FLAG_BSWAP)
1876                 byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
1877         /*
1878          * Super-ick warning:  This code is also duplicated in
1879          * cmd/mdb/common/modules/zfs/zfs.c .  Yeah, I hate code
1880          * replication, too.
1881          */
1882         for (d = 0; d < BP_GET_NDVAS(bp); d++) {
1883                 (void) printf("\tDVA[%d]: vdev_id %lld / %llx\n", d,
1884                     (longlong_t)DVA_GET_VDEV(&dva[d]),
1885                     (longlong_t)DVA_GET_OFFSET(&dva[d]));
1886                 (void) printf("\tDVA[%d]:       GANG: %-5s  GRID:  %04llx\t"
1887                     "ASIZE: %llx\n", d,
1888                     DVA_GET_GANG(&dva[d]) ? "TRUE" : "FALSE",
1889                     (longlong_t)DVA_GET_GRID(&dva[d]),
1890                     (longlong_t)DVA_GET_ASIZE(&dva[d]));
1891                 (void) printf("\tDVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", d,
1892                     (u_longlong_t)DVA_GET_VDEV(&dva[d]),
1893                     (longlong_t)DVA_GET_OFFSET(&dva[d]),
1894                     (longlong_t)BP_GET_PSIZE(bp),
1895                     BP_SHOULD_BYTESWAP(bp) ? "e" : "",
1896                     !DVA_GET_GANG(&dva[d]) && BP_GET_LEVEL(bp) != 0 ?
1897                     "d" : "",
1898                     DVA_GET_GANG(&dva[d]) ? "g" : "",
1899                     BP_GET_COMPRESS(bp) != 0 ? "d" : "");
1900         }
1901         (void) printf("\tLSIZE:  %-16llx\t\tPSIZE: %llx\n",
1902             (longlong_t)BP_GET_LSIZE(bp), (longlong_t)BP_GET_PSIZE(bp));
1903         (void) printf("\tENDIAN: %6s\t\t\t\t\tTYPE:  %s\n",
1904             BP_GET_BYTEORDER(bp) ? "LITTLE" : "BIG",
1905             dmu_ot[BP_GET_TYPE(bp)].ot_name);
1906         (void) printf("\tBIRTH:  %-16llx   LEVEL: %-2llu\tFILL:  %llx\n",
1907             (u_longlong_t)bp->blk_birth, (u_longlong_t)BP_GET_LEVEL(bp),
1908             (u_longlong_t)bp->blk_fill);
1909         (void) printf("\tCKFUNC: %-16s\t\tCOMP:  %s\n",
1910             zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name,
1911             zio_compress_table[BP_GET_COMPRESS(bp)].ci_name);
1912         (void) printf("\tCKSUM:  %llx:%llx:%llx:%llx\n",
1913             (u_longlong_t)bp->blk_cksum.zc_word[0],
1914             (u_longlong_t)bp->blk_cksum.zc_word[1],
1915             (u_longlong_t)bp->blk_cksum.zc_word[2],
1916             (u_longlong_t)bp->blk_cksum.zc_word[3]);
1917 }
1918
1919 static void
1920 zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
1921 {
1922         int i;
1923
1924         for (i = 0; i < nbps; i++)
1925                 zdb_print_blkptr(&bp[i], flags);
1926 }
1927
1928 static void
1929 zdb_dump_gbh(void *buf, int flags)
1930 {
1931         zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
1932 }
1933
1934 static void
1935 zdb_dump_block_raw(void *buf, uint64_t size, int flags)
1936 {
1937         if (flags & ZDB_FLAG_BSWAP)
1938                 byteswap_uint64_array(buf, size);
1939         (void) write(2, buf, size);
1940 }
1941
1942 static void
1943 zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
1944 {
1945         uint64_t *d = (uint64_t *)buf;
1946         int nwords = size / sizeof (uint64_t);
1947         int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
1948         int i, j;
1949         char *hdr, *c;
1950
1951
1952         if (do_bswap)
1953                 hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
1954         else
1955                 hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
1956
1957         (void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
1958
1959         for (i = 0; i < nwords; i += 2) {
1960                 (void) printf("%06llx:  %016llx  %016llx  ",
1961                     (u_longlong_t)(i * sizeof (uint64_t)),
1962                     (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
1963                     (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
1964
1965                 c = (char *)&d[i];
1966                 for (j = 0; j < 2 * sizeof (uint64_t); j++)
1967                         (void) printf("%c", isprint(c[j]) ? c[j] : '.');
1968                 (void) printf("\n");
1969         }
1970 }
1971
1972 /*
1973  * There are two acceptable formats:
1974  *      leaf_name         - For example: c1t0d0 or /tmp/ztest.0a
1975  *      child[.child]*    - For example: 0.1.1
1976  *
1977  * The second form can be used to specify arbitrary vdevs anywhere
1978  * in the heirarchy.  For example, in a pool with a mirror of
1979  * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
1980  */
1981 static vdev_t *
1982 zdb_vdev_lookup(vdev_t *vdev, char *path)
1983 {
1984         char *s, *p, *q;
1985         int i;
1986
1987         if (vdev == NULL)
1988                 return (NULL);
1989
1990         /* First, assume the x.x.x.x format */
1991         i = (int)strtoul(path, &s, 10);
1992         if (s == path || (s && *s != '.' && *s != '\0'))
1993                 goto name;
1994         if (i < 0 || i >= vdev->vdev_children)
1995                 return (NULL);
1996
1997         vdev = vdev->vdev_child[i];
1998         if (*s == '\0')
1999                 return (vdev);
2000         return (zdb_vdev_lookup(vdev, s+1));
2001
2002 name:
2003         for (i = 0; i < vdev->vdev_children; i++) {
2004                 vdev_t *vc = vdev->vdev_child[i];
2005
2006                 if (vc->vdev_path == NULL) {
2007                         vc = zdb_vdev_lookup(vc, path);
2008                         if (vc == NULL)
2009                                 continue;
2010                         else
2011                                 return (vc);
2012                 }
2013
2014                 p = strrchr(vc->vdev_path, '/');
2015                 p = p ? p + 1 : vc->vdev_path;
2016                 q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
2017
2018                 if (strcmp(vc->vdev_path, path) == 0)
2019                         return (vc);
2020                 if (strcmp(p, path) == 0)
2021                         return (vc);
2022                 if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
2023                         return (vc);
2024         }
2025
2026         return (NULL);
2027 }
2028
2029 /*
2030  * Read a block from a pool and print it out.  The syntax of the
2031  * block descriptor is:
2032  *
2033  *      pool:vdev_specifier:offset:size[:flags]
2034  *
2035  *      pool           - The name of the pool you wish to read from
2036  *      vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
2037  *      offset         - offset, in hex, in bytes
2038  *      size           - Amount of data to read, in hex, in bytes
2039  *      flags          - A string of characters specifying options
2040  *               b: Decode a blkptr at given offset within block
2041  *              *c: Calculate and display checksums
2042  *              *d: Decompress data before dumping
2043  *               e: Byteswap data before dumping
2044  *              *g: Display data as a gang block header
2045  *              *i: Display as an indirect block
2046  *               p: Do I/O to physical offset
2047  *               r: Dump raw data to stdout
2048  *
2049  *              * = not yet implemented
2050  */
2051 static void
2052 zdb_read_block(char *thing, spa_t **spap)
2053 {
2054         spa_t *spa = *spap;
2055         int flags = 0;
2056         uint64_t offset = 0, size = 0, blkptr_offset = 0;
2057         zio_t *zio;
2058         vdev_t *vd;
2059         void *buf;
2060         char *s, *p, *dup, *pool, *vdev, *flagstr;
2061         int i, error, zio_flags;
2062
2063         dup = strdup(thing);
2064         s = strtok(dup, ":");
2065         pool = s ? s : "";
2066         s = strtok(NULL, ":");
2067         vdev = s ? s : "";
2068         s = strtok(NULL, ":");
2069         offset = strtoull(s ? s : "", NULL, 16);
2070         s = strtok(NULL, ":");
2071         size = strtoull(s ? s : "", NULL, 16);
2072         s = strtok(NULL, ":");
2073         flagstr = s ? s : "";
2074
2075         s = NULL;
2076         if (size == 0)
2077                 s = "size must not be zero";
2078         if (!IS_P2ALIGNED(size, DEV_BSIZE))
2079                 s = "size must be a multiple of sector size";
2080         if (!IS_P2ALIGNED(offset, DEV_BSIZE))
2081                 s = "offset must be a multiple of sector size";
2082         if (s) {
2083                 (void) printf("Invalid block specifier: %s  - %s\n", thing, s);
2084                 free(dup);
2085                 return;
2086         }
2087
2088         for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
2089                 for (i = 0; flagstr[i]; i++) {
2090                         int bit = flagbits[(uchar_t)flagstr[i]];
2091
2092                         if (bit == 0) {
2093                                 (void) printf("***Invalid flag: %c\n",
2094                                     flagstr[i]);
2095                                 continue;
2096                         }
2097                         flags |= bit;
2098
2099                         /* If it's not something with an argument, keep going */
2100                         if ((bit & (ZDB_FLAG_CHECKSUM | ZDB_FLAG_DECOMPRESS |
2101                             ZDB_FLAG_PRINT_BLKPTR)) == 0)
2102                                 continue;
2103
2104                         p = &flagstr[i + 1];
2105                         if (bit == ZDB_FLAG_PRINT_BLKPTR)
2106                                 blkptr_offset = strtoull(p, &p, 16);
2107                         if (*p != ':' && *p != '\0') {
2108                                 (void) printf("***Invalid flag arg: '%s'\n", s);
2109                                 free(dup);
2110                                 return;
2111                         }
2112                 }
2113         }
2114
2115         if (spa == NULL || strcmp(spa_name(spa), pool) != 0) {
2116                 if (spa)
2117                         spa_close(spa, (void *)zdb_read_block);
2118                 error = spa_open(pool, spap, (void *)zdb_read_block);
2119                 if (error)
2120                         fatal("Failed to open pool '%s': %s",
2121                             pool, strerror(error));
2122                 spa = *spap;
2123         }
2124
2125         vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
2126         if (vd == NULL) {
2127                 (void) printf("***Invalid vdev: %s\n", vdev);
2128                 free(dup);
2129                 return;
2130         } else {
2131                 if (vd->vdev_path)
2132                         (void) printf("Found vdev: %s\n", vd->vdev_path);
2133                 else
2134                         (void) printf("Found vdev type: %s\n",
2135                             vd->vdev_ops->vdev_op_type);
2136         }
2137
2138         buf = umem_alloc(size, UMEM_NOFAIL);
2139
2140         zio_flags = ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
2141             ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY;
2142
2143         spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
2144         zio = zio_root(spa, NULL, NULL, 0);
2145         /* XXX todo - cons up a BP so RAID-Z will be happy */
2146         zio_nowait(zio_vdev_child_io(zio, NULL, vd, offset, buf, size,
2147             ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ, zio_flags, NULL, NULL));
2148         error = zio_wait(zio);
2149         spa_config_exit(spa, SCL_STATE, FTAG);
2150
2151         if (error) {
2152                 (void) printf("Read of %s failed, error: %d\n", thing, error);
2153                 goto out;
2154         }
2155
2156         if (flags & ZDB_FLAG_PRINT_BLKPTR)
2157                 zdb_print_blkptr((blkptr_t *)(void *)
2158                     ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
2159         else if (flags & ZDB_FLAG_RAW)
2160                 zdb_dump_block_raw(buf, size, flags);
2161         else if (flags & ZDB_FLAG_INDIRECT)
2162                 zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
2163                     flags);
2164         else if (flags & ZDB_FLAG_GBH)
2165                 zdb_dump_gbh(buf, flags);
2166         else
2167                 zdb_dump_block(thing, buf, size, flags);
2168
2169 out:
2170         umem_free(buf, size);
2171         free(dup);
2172 }
2173
2174 static boolean_t
2175 nvlist_string_match(nvlist_t *config, char *name, char *tgt)
2176 {
2177         char *s;
2178
2179         if (nvlist_lookup_string(config, name, &s) != 0)
2180                 return (B_FALSE);
2181
2182         return (strcmp(s, tgt) == 0);
2183 }
2184
2185 static boolean_t
2186 nvlist_uint64_match(nvlist_t *config, char *name, uint64_t tgt)
2187 {
2188         uint64_t val;
2189
2190         if (nvlist_lookup_uint64(config, name, &val) != 0)
2191                 return (B_FALSE);
2192
2193         return (val == tgt);
2194 }
2195
2196 static boolean_t
2197 vdev_child_guid_match(nvlist_t *vdev, uint64_t guid)
2198 {
2199         nvlist_t **child;
2200         uint_t c, children;
2201
2202         verify(nvlist_lookup_nvlist_array(vdev, ZPOOL_CONFIG_CHILDREN,
2203             &child, &children) == 0);
2204         for (c = 0; c < children; ++c)
2205                 if (nvlist_uint64_match(child[c], ZPOOL_CONFIG_GUID, guid))
2206                         return (B_TRUE);
2207         return (B_FALSE);
2208 }
2209
2210 static boolean_t
2211 vdev_child_string_match(nvlist_t *vdev, char *tgt)
2212 {
2213         nvlist_t **child;
2214         uint_t c, children;
2215
2216         verify(nvlist_lookup_nvlist_array(vdev, ZPOOL_CONFIG_CHILDREN,
2217             &child, &children) == 0);
2218         for (c = 0; c < children; ++c) {
2219                 if (nvlist_string_match(child[c], ZPOOL_CONFIG_PATH, tgt) ||
2220                     nvlist_string_match(child[c], ZPOOL_CONFIG_DEVID, tgt))
2221                         return (B_TRUE);
2222         }
2223         return (B_FALSE);
2224 }
2225
2226 static boolean_t
2227 vdev_guid_match(nvlist_t *config, uint64_t guid)
2228 {
2229         nvlist_t *nvroot;
2230
2231         verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
2232             &nvroot) == 0);
2233
2234         return (nvlist_uint64_match(nvroot, ZPOOL_CONFIG_GUID, guid) ||
2235             vdev_child_guid_match(nvroot, guid));
2236 }
2237
2238 static boolean_t
2239 vdev_string_match(nvlist_t *config, char *tgt)
2240 {
2241         nvlist_t *nvroot;
2242
2243         verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
2244             &nvroot) == 0);
2245
2246         return (vdev_child_string_match(nvroot, tgt));
2247 }
2248
2249 static boolean_t
2250 pool_match(nvlist_t *config, char *tgt)
2251 {
2252         uint64_t guid = strtoull(tgt, NULL, 0);
2253
2254         if (guid != 0) {
2255                 return (
2256                     nvlist_uint64_match(config, ZPOOL_CONFIG_POOL_GUID, guid) ||
2257                     vdev_guid_match(config, guid));
2258         } else {
2259                 return (
2260                     nvlist_string_match(config, ZPOOL_CONFIG_POOL_NAME, tgt) ||
2261                     vdev_string_match(config, tgt));
2262         }
2263 }
2264
2265 static int
2266 find_exported_zpool(char *pool_id, nvlist_t **configp, char *vdev_dir)
2267 {
2268         nvlist_t *pools;
2269         int error = ENOENT;
2270         nvlist_t *match = NULL;
2271
2272         if (vdev_dir != NULL)
2273                 pools = zpool_find_import_activeok(g_zfs, 1, &vdev_dir);
2274         else
2275                 pools = zpool_find_import_activeok(g_zfs, 0, NULL);
2276
2277         if (pools != NULL) {
2278                 nvpair_t *elem = NULL;
2279
2280                 while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) {
2281                         verify(nvpair_value_nvlist(elem, configp) == 0);
2282                         if (pool_match(*configp, pool_id)) {
2283                                 if (match != NULL) {
2284                                         (void) fatal(
2285                                             "More than one matching pool - "
2286                                             "specify guid/devid/device path.");
2287                                 } else {
2288                                         match = *configp;
2289                                         error = 0;
2290                                 }
2291                         }
2292                 }
2293         }
2294
2295         *configp = error ? NULL : match;
2296
2297         return (error);
2298 }
2299
2300 int
2301 main(int argc, char **argv)
2302 {
2303         int i, c;
2304         struct rlimit rl = { 1024, 1024 };
2305         spa_t *spa;
2306         objset_t *os = NULL;
2307         char *endstr;
2308         int dump_all = 1;
2309         int verbose = 0;
2310         int error;
2311         int exported = 0;
2312         char *vdev_dir = NULL;
2313
2314         (void) setrlimit(RLIMIT_NOFILE, &rl);
2315         (void) enable_extended_FILE_stdio(-1, -1);
2316
2317         dprintf_setup(&argc, argv);
2318
2319         while ((c = getopt(argc, argv, "udibcmsvCLS:U:lRep:t:")) != -1) {
2320                 switch (c) {
2321                 case 'u':
2322                 case 'd':
2323                 case 'i':
2324                 case 'b':
2325                 case 'c':
2326                 case 'm':
2327                 case 's':
2328                 case 'C':
2329                 case 'l':
2330                 case 'R':
2331                         dump_opt[c]++;
2332                         dump_all = 0;
2333                         break;
2334                 case 'L':
2335                         dump_opt[c]++;
2336                         break;
2337                 case 'v':
2338                         verbose++;
2339                         break;
2340                 case 'U':
2341                         spa_config_path = optarg;
2342                         break;
2343                 case 'e':
2344                         exported = 1;
2345                         break;
2346                 case 'p':
2347                         vdev_dir = optarg;
2348                         break;
2349                 case 'S':
2350                         dump_opt[c]++;
2351                         dump_all = 0;
2352                         zdb_sig_user_data = (strncmp(optarg, "user:", 5) == 0);
2353                         if (!zdb_sig_user_data && strncmp(optarg, "all:", 4))
2354                                 usage();
2355                         endstr = strchr(optarg, ':') + 1;
2356                         if (strcmp(endstr, "fletcher2") == 0)
2357                                 zdb_sig_cksumalg = ZIO_CHECKSUM_FLETCHER_2;
2358                         else if (strcmp(endstr, "fletcher4") == 0)
2359                                 zdb_sig_cksumalg = ZIO_CHECKSUM_FLETCHER_4;
2360                         else if (strcmp(endstr, "sha256") == 0)
2361                                 zdb_sig_cksumalg = ZIO_CHECKSUM_SHA256;
2362                         else if (strcmp(endstr, "all") == 0)
2363                                 zdb_sig_cksumalg = ZIO_CHECKSUM_FLETCHER_2;
2364                         else
2365                                 usage();
2366                         break;
2367                 case 't':
2368                         ub_max_txg = strtoull(optarg, NULL, 0);
2369                         if (ub_max_txg < TXG_INITIAL) {
2370                                 (void) fprintf(stderr, "incorrect txg "
2371                                     "specified: %s\n", optarg);
2372                                 usage();
2373                         }
2374                         break;
2375                 default:
2376                         usage();
2377                         break;
2378                 }
2379         }
2380
2381         if (vdev_dir != NULL && exported == 0) {
2382                 (void) fprintf(stderr, "-p option requires use of -e\n");
2383                 usage();
2384         }
2385
2386         kernel_init(FREAD);
2387         g_zfs = libzfs_init();
2388         ASSERT(g_zfs != NULL);
2389
2390         for (c = 0; c < 256; c++) {
2391                 if (dump_all && c != 'l' && c != 'R')
2392                         dump_opt[c] = 1;
2393                 if (dump_opt[c])
2394                         dump_opt[c] += verbose;
2395         }
2396
2397         argc -= optind;
2398         argv += optind;
2399
2400         if (argc < 1) {
2401                 if (dump_opt['C']) {
2402                         dump_cachefile(spa_config_path);
2403                         return (0);
2404                 }
2405                 usage();
2406         }
2407
2408         if (dump_opt['l']) {
2409                 dump_label(argv[0]);
2410                 return (0);
2411         }
2412
2413         if (dump_opt['R']) {
2414                 flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
2415                 flagbits['c'] = ZDB_FLAG_CHECKSUM;
2416                 flagbits['d'] = ZDB_FLAG_DECOMPRESS;
2417                 flagbits['e'] = ZDB_FLAG_BSWAP;
2418                 flagbits['g'] = ZDB_FLAG_GBH;
2419                 flagbits['i'] = ZDB_FLAG_INDIRECT;
2420                 flagbits['p'] = ZDB_FLAG_PHYS;
2421                 flagbits['r'] = ZDB_FLAG_RAW;
2422
2423                 spa = NULL;
2424                 while (argv[0]) {
2425                         zdb_read_block(argv[0], &spa);
2426                         argv++;
2427                         argc--;
2428                 }
2429                 if (spa)
2430                         spa_close(spa, (void *)zdb_read_block);
2431                 return (0);
2432         }
2433
2434         if (dump_opt['C'])
2435                 dump_config(argv[0]);
2436
2437         error = 0;
2438         if (exported) {
2439                 /*
2440                  * Check to see if the name refers to an exported zpool
2441                  */
2442                 char *slash;
2443                 nvlist_t *exported_conf = NULL;
2444
2445                 if ((slash = strchr(argv[0], '/')) != NULL)
2446                         *slash = '\0';
2447
2448                 error = find_exported_zpool(argv[0], &exported_conf, vdev_dir);
2449                 if (error == 0) {
2450                         nvlist_t *nvl = NULL;
2451
2452                         if (vdev_dir != NULL) {
2453                                 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
2454                                         error = ENOMEM;
2455                                 else if (nvlist_add_string(nvl,
2456                                     zpool_prop_to_name(ZPOOL_PROP_ALTROOT),
2457                                     vdev_dir) != 0)
2458                                         error = ENOMEM;
2459                         }
2460
2461                         if (error == 0)
2462                                 error = spa_import_verbatim(argv[0],
2463                                     exported_conf, nvl);
2464
2465                         nvlist_free(nvl);
2466                 }
2467
2468                 if (slash != NULL)
2469                         *slash = '/';
2470         }
2471
2472         if (error == 0) {
2473                 if (strchr(argv[0], '/') != NULL) {
2474                         error = dmu_objset_open(argv[0], DMU_OST_ANY,
2475                             DS_MODE_USER | DS_MODE_READONLY, &os);
2476                 } else {
2477                         error = spa_open(argv[0], &spa, FTAG);
2478                 }
2479         }
2480
2481         if (error)
2482                 fatal("can't open %s: %s", argv[0], strerror(error));
2483
2484         argv++;
2485         if (--argc > 0) {
2486                 zopt_objects = argc;
2487                 zopt_object = calloc(zopt_objects, sizeof (uint64_t));
2488                 for (i = 0; i < zopt_objects; i++) {
2489                         errno = 0;
2490                         zopt_object[i] = strtoull(argv[i], NULL, 0);
2491                         if (zopt_object[i] == 0 && errno != 0)
2492                                 fatal("bad object number %s: %s",
2493                                     argv[i], strerror(errno));
2494                 }
2495         }
2496
2497         if (os != NULL) {
2498                 dump_dir(os);
2499                 dmu_objset_close(os);
2500         } else {
2501                 dump_zpool(spa);
2502                 spa_close(spa, FTAG);
2503         }
2504
2505         fuid_table_destroy();
2506
2507         libzfs_fini(g_zfs);
2508         kernel_fini();
2509
2510         return (0);
2511 }