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