cddl/contrib/opensolaris/cmd/zdb/zdb.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
  25  */
  26
  27 #include <stdio.h>
  28 #include <unistd.h>
  29 #include <stdio_ext.h>
  30 #include <stdlib.h>
  31 #include <ctype.h>
  32 #include <sys/zfs_context.h>
  33 #include <sys/spa.h>
  34 #include <sys/spa_impl.h>
  35 #include <sys/dmu.h>
  36 #include <sys/zap.h>
  37 #include <sys/fs/zfs.h>
  38 #include <sys/zfs_znode.h>
  39 #include <sys/zfs_sa.h>
  40 #include <sys/sa.h>
  41 #include <sys/sa_impl.h>
  42 #include <sys/vdev.h>
  43 #include <sys/vdev_impl.h>
  44 #include <sys/metaslab_impl.h>
  45 #include <sys/dmu_objset.h>
  46 #include <sys/dsl_dir.h>
  47 #include <sys/dsl_dataset.h>
  48 #include <sys/dsl_pool.h>
  49 #include <sys/dbuf.h>
  50 #include <sys/zil.h>
  51 #include <sys/zil_impl.h>
  52 #include <sys/stat.h>
  53 #include <sys/resource.h>
  54 #include <sys/dmu_traverse.h>
  55 #include <sys/zio_checksum.h>
  56 #include <sys/zio_compress.h>
  57 #include <sys/zfs_fuid.h>
  58 #include <sys/arc.h>
  59 #include <sys/ddt.h>
  60 #include <sys/zfeature.h>
  61 #include <zfs_comutil.h>
  62 #undef ZFS_MAXNAMELEN
  63 #undef verify
  64 #include <libzfs.h>
  65
  66 #define ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ?        \
  67         zio_compress_table[(idx)].ci_name : "UNKNOWN")
  68 #define ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ?        \
  69         zio_checksum_table[(idx)].ci_name : "UNKNOWN")
  70 #define ZDB_OT_NAME(idx) ((idx) < DMU_OT_NUMTYPES ?     \
  71         dmu_ot[(idx)].ot_name : DMU_OT_IS_VALID(idx) ?  \
  72         dmu_ot_byteswap[DMU_OT_BYTESWAP(idx)].ob_name : "UNKNOWN")
  73 #define ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) :             \
  74         (((idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA) ? \
  75         DMU_OT_ZAP_OTHER : DMU_OT_NUMTYPES))
  76
  77 #ifndef lint
  78 extern boolean_t zfs_recover;
  79 extern uint64_t zfs_arc_max, zfs_arc_meta_limit;
  80 extern int zfs_vdev_async_read_max_active;
  81 #else
  82 boolean_t zfs_recover;
  83 uint64_t zfs_arc_max, zfs_arc_meta_limit;
  84 int zfs_vdev_async_read_max_active;
  85 #endif
  86
  87 const char cmdname[] = "zdb";
  88 uint8_t dump_opt[256];
  89
  90 typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
  91
  92 extern void dump_intent_log(zilog_t *);
  93 uint64_t *zopt_object = NULL;
  94 int zopt_objects = 0;
  95 libzfs_handle_t *g_zfs;
  96 uint64_t max_inflight = 1000;
  97
  98 /*
  99  * These libumem hooks provide a reasonable set of defaults for the allocator's
 100  * debugging facilities.
 101  */
 102 const char *
 103 _umem_debug_init()
 104 {
 105         return ("default,verbose"); /* $UMEM_DEBUG setting */
 106 }
 107
 108 const char *
 109 _umem_logging_init(void)
 110 {
 111         return ("fail,contents"); /* $UMEM_LOGGING setting */
 112 }
 113
 114 static void
 115 usage(void)
 116 {
 117         (void) fprintf(stderr,
 118             "Usage: %s [-CumMdibcsDvhLXFPA] [-t txg] [-e [-p path...]] "
 119             "[-U config] [-I inflight I/Os] [-x dumpdir] poolname [object...]\n"
 120             "       %s [-divPA] [-e -p path...] [-U config] dataset "
 121             "[object...]\n"
 122             "       %s -mM [-LXFPA] [-t txg] [-e [-p path...]] [-U config] "
 123             "poolname [vdev [metaslab...]]\n"
 124             "       %s -R [-A] [-e [-p path...]] poolname "
 125             "vdev:offset:size[:flags]\n"
 126             "       %s -S [-PA] [-e [-p path...]] [-U config] poolname\n"
 127             "       %s -l [-uA] device\n"
 128             "       %s -C [-A] [-U config]\n\n",
 129             cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname);
 130
 131         (void) fprintf(stderr, "    Dataset name must include at least one "
 132             "separator character '/' or '@'\n");
 133         (void) fprintf(stderr, "    If dataset name is specified, only that "
 134             "dataset is dumped\n");
 135         (void) fprintf(stderr, "    If object numbers are specified, only "
 136             "those objects are dumped\n\n");
 137         (void) fprintf(stderr, "    Options to control amount of output:\n");
 138         (void) fprintf(stderr, "        -u uberblock\n");
 139         (void) fprintf(stderr, "        -d dataset(s)\n");
 140         (void) fprintf(stderr, "        -i intent logs\n");
 141         (void) fprintf(stderr, "        -C config (or cachefile if alone)\n");
 142         (void) fprintf(stderr, "        -h pool history\n");
 143         (void) fprintf(stderr, "        -b block statistics\n");
 144         (void) fprintf(stderr, "        -m metaslabs\n");
 145         (void) fprintf(stderr, "        -M metaslab groups\n");
 146         (void) fprintf(stderr, "        -c checksum all metadata (twice for "
 147             "all data) blocks\n");
 148         (void) fprintf(stderr, "        -s report stats on zdb's I/O\n");
 149         (void) fprintf(stderr, "        -D dedup statistics\n");
 150         (void) fprintf(stderr, "        -S simulate dedup to measure effect\n");
 151         (void) fprintf(stderr, "        -v verbose (applies to all others)\n");
 152         (void) fprintf(stderr, "        -l dump label contents\n");
 153         (void) fprintf(stderr, "        -L disable leak tracking (do not "
 154             "load spacemaps)\n");
 155         (void) fprintf(stderr, "        -R read and display block from a "
 156             "device\n\n");
 157         (void) fprintf(stderr, "    Below options are intended for use "
 158             "with other options:\n");
 159         (void) fprintf(stderr, "        -A ignore assertions (-A), enable "
 160             "panic recovery (-AA) or both (-AAA)\n");
 161         (void) fprintf(stderr, "        -F attempt automatic rewind within "
 162             "safe range of transaction groups\n");
 163         (void) fprintf(stderr, "        -U <cachefile_path> -- use alternate "
 164             "cachefile\n");
 165         (void) fprintf(stderr, "        -X attempt extreme rewind (does not "
 166             "work with dataset)\n");
 167         (void) fprintf(stderr, "        -e pool is exported/destroyed/"
 168             "has altroot/not in a cachefile\n");
 169         (void) fprintf(stderr, "        -p <path> -- use one or more with "
 170             "-e to specify path to vdev dir\n");
 171         (void) fprintf(stderr, "        -x <dumpdir> -- "
 172             "dump all read blocks into specified directory\n");
 173         (void) fprintf(stderr, "        -P print numbers in parseable form\n");
 174         (void) fprintf(stderr, "        -t <txg> -- highest txg to use when "
 175             "searching for uberblocks\n");
 176         (void) fprintf(stderr, "        -I <number of inflight I/Os> -- "
 177             "specify the maximum number of "
 178             "checksumming I/Os [default is 200]\n");
 179         (void) fprintf(stderr, "Specify an option more than once (e.g. -bb) "
 180             "to make only that option verbose\n");
 181         (void) fprintf(stderr, "Default is to dump everything non-verbosely\n");
 182         exit(1);
 183 }
 184
 185 /*
 186  * Called for usage errors that are discovered after a call to spa_open(),
 187  * dmu_bonus_hold(), or pool_match().  abort() is called for other errors.
 188  */
 189
 190 static void
 191 fatal(const char *fmt, ...)
 192 {
 193         va_list ap;
 194
 195         va_start(ap, fmt);
 196         (void) fprintf(stderr, "%s: ", cmdname);
 197         (void) vfprintf(stderr, fmt, ap);
 198         va_end(ap);
 199         (void) fprintf(stderr, "\n");
 200
 201         exit(1);
 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, DMU_READ_PREFETCH));
 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 /* ARGSUSED */
 224 static void
 225 dump_history_offsets(objset_t *os, uint64_t object, void *data, size_t size)
 226 {
 227         spa_history_phys_t *shp = data;
 228
 229         if (shp == NULL)
 230                 return;
 231
 232         (void) printf("\t\tpool_create_len = %llu\n",
 233             (u_longlong_t)shp->sh_pool_create_len);
 234         (void) printf("\t\tphys_max_off = %llu\n",
 235             (u_longlong_t)shp->sh_phys_max_off);
 236         (void) printf("\t\tbof = %llu\n",
 237             (u_longlong_t)shp->sh_bof);
 238         (void) printf("\t\teof = %llu\n",
 239             (u_longlong_t)shp->sh_eof);
 240         (void) printf("\t\trecords_lost = %llu\n",
 241             (u_longlong_t)shp->sh_records_lost);
 242 }
 243
 244 static void
 245 zdb_nicenum(uint64_t num, char *buf)
 246 {
 247         if (dump_opt['P'])
 248                 (void) sprintf(buf, "%llu", (longlong_t)num);
 249         else
 250                 nicenum(num, buf);
 251 }
 252
 253 const char histo_stars[] = "****************************************";
 254 const int histo_width = sizeof (histo_stars) - 1;
 255
 256 static void
 257 dump_histogram(const uint64_t *histo, int size, int offset)
 258 {
 259         int i;
 260         int minidx = size - 1;
 261         int maxidx = 0;
 262         uint64_t max = 0;
 263
 264         for (i = 0; i < size; i++) {
 265                 if (histo[i] > max)
 266                         max = histo[i];
 267                 if (histo[i] > 0 && i > maxidx)
 268                         maxidx = i;
 269                 if (histo[i] > 0 && i < minidx)
 270                         minidx = i;
 271         }
 272
 273         if (max < histo_width)
 274                 max = histo_width;
 275
 276         for (i = minidx; i <= maxidx; i++) {
 277                 (void) printf("\t\t\t%3u: %6llu %s\n",
 278                     i + offset, (u_longlong_t)histo[i],
 279                     &histo_stars[(max - histo[i]) * histo_width / max]);
 280         }
 281 }
 282
 283 static void
 284 dump_zap_stats(objset_t *os, uint64_t object)
 285 {
 286         int error;
 287         zap_stats_t zs;
 288
 289         error = zap_get_stats(os, object, &zs);
 290         if (error)
 291                 return;
 292
 293         if (zs.zs_ptrtbl_len == 0) {
 294                 ASSERT(zs.zs_num_blocks == 1);
 295                 (void) printf("\tmicrozap: %llu bytes, %llu entries\n",
 296                     (u_longlong_t)zs.zs_blocksize,
 297                     (u_longlong_t)zs.zs_num_entries);
 298                 return;
 299         }
 300
 301         (void) printf("\tFat ZAP stats:\n");
 302
 303         (void) printf("\t\tPointer table:\n");
 304         (void) printf("\t\t\t%llu elements\n",
 305             (u_longlong_t)zs.zs_ptrtbl_len);
 306         (void) printf("\t\t\tzt_blk: %llu\n",
 307             (u_longlong_t)zs.zs_ptrtbl_zt_blk);
 308         (void) printf("\t\t\tzt_numblks: %llu\n",
 309             (u_longlong_t)zs.zs_ptrtbl_zt_numblks);
 310         (void) printf("\t\t\tzt_shift: %llu\n",
 311             (u_longlong_t)zs.zs_ptrtbl_zt_shift);
 312         (void) printf("\t\t\tzt_blks_copied: %llu\n",
 313             (u_longlong_t)zs.zs_ptrtbl_blks_copied);
 314         (void) printf("\t\t\tzt_nextblk: %llu\n",
 315             (u_longlong_t)zs.zs_ptrtbl_nextblk);
 316
 317         (void) printf("\t\tZAP entries: %llu\n",
 318             (u_longlong_t)zs.zs_num_entries);
 319         (void) printf("\t\tLeaf blocks: %llu\n",
 320             (u_longlong_t)zs.zs_num_leafs);
 321         (void) printf("\t\tTotal blocks: %llu\n",
 322             (u_longlong_t)zs.zs_num_blocks);
 323         (void) printf("\t\tzap_block_type: 0x%llx\n",
 324             (u_longlong_t)zs.zs_block_type);
 325         (void) printf("\t\tzap_magic: 0x%llx\n",
 326             (u_longlong_t)zs.zs_magic);
 327         (void) printf("\t\tzap_salt: 0x%llx\n",
 328             (u_longlong_t)zs.zs_salt);
 329
 330         (void) printf("\t\tLeafs with 2^n pointers:\n");
 331         dump_histogram(zs.zs_leafs_with_2n_pointers, ZAP_HISTOGRAM_SIZE, 0);
 332
 333         (void) printf("\t\tBlocks with n*5 entries:\n");
 334         dump_histogram(zs.zs_blocks_with_n5_entries, ZAP_HISTOGRAM_SIZE, 0);
 335
 336         (void) printf("\t\tBlocks n/10 full:\n");
 337         dump_histogram(zs.zs_blocks_n_tenths_full, ZAP_HISTOGRAM_SIZE, 0);
 338
 339         (void) printf("\t\tEntries with n chunks:\n");
 340         dump_histogram(zs.zs_entries_using_n_chunks, ZAP_HISTOGRAM_SIZE, 0);
 341
 342         (void) printf("\t\tBuckets with n entries:\n");
 343         dump_histogram(zs.zs_buckets_with_n_entries, ZAP_HISTOGRAM_SIZE, 0);
 344 }
 345
 346 /*ARGSUSED*/
 347 static void
 348 dump_none(objset_t *os, uint64_t object, void *data, size_t size)
 349 {
 350 }
 351
 352 /*ARGSUSED*/
 353 static void
 354 dump_unknown(objset_t *os, uint64_t object, void *data, size_t size)
 355 {
 356         (void) printf("\tUNKNOWN OBJECT TYPE\n");
 357 }
 358
 359 /*ARGSUSED*/
 360 void
 361 dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
 362 {
 363 }
 364
 365 /*ARGSUSED*/
 366 static void
 367 dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
 368 {
 369 }
 370
 371 /*ARGSUSED*/
 372 static void
 373 dump_zap(objset_t *os, uint64_t object, void *data, size_t size)
 374 {
 375         zap_cursor_t zc;
 376         zap_attribute_t attr;
 377         void *prop;
 378         int i;
 379
 380         dump_zap_stats(os, object);
 381         (void) printf("\n");
 382
 383         for (zap_cursor_init(&zc, os, object);
 384             zap_cursor_retrieve(&zc, &attr) == 0;
 385             zap_cursor_advance(&zc)) {
 386                 (void) printf("\t\t%s = ", attr.za_name);
 387                 if (attr.za_num_integers == 0) {
 388                         (void) printf("\n");
 389                         continue;
 390                 }
 391                 prop = umem_zalloc(attr.za_num_integers *
 392                     attr.za_integer_length, UMEM_NOFAIL);
 393                 (void) zap_lookup(os, object, attr.za_name,
 394                     attr.za_integer_length, attr.za_num_integers, prop);
 395                 if (attr.za_integer_length == 1) {
 396                         (void) printf("%s", (char *)prop);
 397                 } else {
 398                         for (i = 0; i < attr.za_num_integers; i++) {
 399                                 switch (attr.za_integer_length) {
 400                                 case 2:
 401                                         (void) printf("%u ",
 402                                             ((uint16_t *)prop)[i]);
 403                                         break;
 404                                 case 4:
 405                                         (void) printf("%u ",
 406                                             ((uint32_t *)prop)[i]);
 407                                         break;
 408                                 case 8:
 409                                         (void) printf("%lld ",
 410                                             (u_longlong_t)((int64_t *)prop)[i]);
 411                                         break;
 412                                 }
 413                         }
 414                 }
 415                 (void) printf("\n");
 416                 umem_free(prop, attr.za_num_integers * attr.za_integer_length);
 417         }
 418         zap_cursor_fini(&zc);
 419 }
 420
 421 /*ARGSUSED*/
 422 static void
 423 dump_ddt_zap(objset_t *os, uint64_t object, void *data, size_t size)
 424 {
 425         dump_zap_stats(os, object);
 426         /* contents are printed elsewhere, properly decoded */
 427 }
 428
 429 /*ARGSUSED*/
 430 static void
 431 dump_sa_attrs(objset_t *os, uint64_t object, void *data, size_t size)
 432 {
 433         zap_cursor_t zc;
 434         zap_attribute_t attr;
 435
 436         dump_zap_stats(os, object);
 437         (void) printf("\n");
 438
 439         for (zap_cursor_init(&zc, os, object);
 440             zap_cursor_retrieve(&zc, &attr) == 0;
 441             zap_cursor_advance(&zc)) {
 442                 (void) printf("\t\t%s = ", attr.za_name);
 443                 if (attr.za_num_integers == 0) {
 444                         (void) printf("\n");
 445                         continue;
 446                 }
 447                 (void) printf(" %llx : [%d:%d:%d]\n",
 448                     (u_longlong_t)attr.za_first_integer,
 449                     (int)ATTR_LENGTH(attr.za_first_integer),
 450                     (int)ATTR_BSWAP(attr.za_first_integer),
 451                     (int)ATTR_NUM(attr.za_first_integer));
 452         }
 453         zap_cursor_fini(&zc);
 454 }
 455
 456 /*ARGSUSED*/
 457 static void
 458 dump_sa_layouts(objset_t *os, uint64_t object, void *data, size_t size)
 459 {
 460         zap_cursor_t zc;
 461         zap_attribute_t attr;
 462         uint16_t *layout_attrs;
 463         int i;
 464
 465         dump_zap_stats(os, object);
 466         (void) printf("\n");
 467
 468         for (zap_cursor_init(&zc, os, object);
 469             zap_cursor_retrieve(&zc, &attr) == 0;
 470             zap_cursor_advance(&zc)) {
 471                 (void) printf("\t\t%s = [", attr.za_name);
 472                 if (attr.za_num_integers == 0) {
 473                         (void) printf("\n");
 474                         continue;
 475                 }
 476
 477                 VERIFY(attr.za_integer_length == 2);
 478                 layout_attrs = umem_zalloc(attr.za_num_integers *
 479                     attr.za_integer_length, UMEM_NOFAIL);
 480
 481                 VERIFY(zap_lookup(os, object, attr.za_name,
 482                     attr.za_integer_length,
 483                     attr.za_num_integers, layout_attrs) == 0);
 484
 485                 for (i = 0; i != attr.za_num_integers; i++)
 486                         (void) printf(" %d ", (int)layout_attrs[i]);
 487                 (void) printf("]\n");
 488                 umem_free(layout_attrs,
 489                     attr.za_num_integers * attr.za_integer_length);
 490         }
 491         zap_cursor_fini(&zc);
 492 }
 493
 494 /*ARGSUSED*/
 495 static void
 496 dump_zpldir(objset_t *os, uint64_t object, void *data, size_t size)
 497 {
 498         zap_cursor_t zc;
 499         zap_attribute_t attr;
 500         const char *typenames[] = {
 501                 /* 0 */ "not specified",
 502                 /* 1 */ "FIFO",
 503                 /* 2 */ "Character Device",
 504                 /* 3 */ "3 (invalid)",
 505                 /* 4 */ "Directory",
 506                 /* 5 */ "5 (invalid)",
 507                 /* 6 */ "Block Device",
 508                 /* 7 */ "7 (invalid)",
 509                 /* 8 */ "Regular File",
 510                 /* 9 */ "9 (invalid)",
 511                 /* 10 */ "Symbolic Link",
 512                 /* 11 */ "11 (invalid)",
 513                 /* 12 */ "Socket",
 514                 /* 13 */ "Door",
 515                 /* 14 */ "Event Port",
 516                 /* 15 */ "15 (invalid)",
 517         };
 518
 519         dump_zap_stats(os, object);
 520         (void) printf("\n");
 521
 522         for (zap_cursor_init(&zc, os, object);
 523             zap_cursor_retrieve(&zc, &attr) == 0;
 524             zap_cursor_advance(&zc)) {
 525                 (void) printf("\t\t%s = %lld (type: %s)\n",
 526                     attr.za_name, ZFS_DIRENT_OBJ(attr.za_first_integer),
 527                     typenames[ZFS_DIRENT_TYPE(attr.za_first_integer)]);
 528         }
 529         zap_cursor_fini(&zc);
 530 }
 531
 532 int
 533 get_dtl_refcount(vdev_t *vd)
 534 {
 535         int refcount = 0;
 536
 537         if (vd->vdev_ops->vdev_op_leaf) {
 538                 space_map_t *sm = vd->vdev_dtl_sm;
 539
 540                 if (sm != NULL &&
 541                     sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
 542                         return (1);
 543                 return (0);
 544         }
 545
 546         for (int c = 0; c < vd->vdev_children; c++)
 547                 refcount += get_dtl_refcount(vd->vdev_child[c]);
 548         return (refcount);
 549 }
 550
 551 int
 552 get_metaslab_refcount(vdev_t *vd)
 553 {
 554         int refcount = 0;
 555
 556         if (vd->vdev_top == vd && !vd->vdev_removing) {
 557                 for (int m = 0; m < vd->vdev_ms_count; m++) {
 558                         space_map_t *sm = vd->vdev_ms[m]->ms_sm;
 559
 560                         if (sm != NULL &&
 561                             sm->sm_dbuf->db_size == sizeof (space_map_phys_t))
 562                                 refcount++;
 563                 }
 564         }
 565         for (int c = 0; c < vd->vdev_children; c++)
 566                 refcount += get_metaslab_refcount(vd->vdev_child[c]);
 567
 568         return (refcount);
 569 }
 570
 571 static int
 572 verify_spacemap_refcounts(spa_t *spa)
 573 {
 574         uint64_t expected_refcount = 0;
 575         uint64_t actual_refcount;
 576
 577         (void) feature_get_refcount(spa,
 578             &spa_feature_table[SPA_FEATURE_SPACEMAP_HISTOGRAM],
 579             &expected_refcount);
 580         actual_refcount = get_dtl_refcount(spa->spa_root_vdev);
 581         actual_refcount += get_metaslab_refcount(spa->spa_root_vdev);
 582
 583         if (expected_refcount != actual_refcount) {
 584                 (void) printf("space map refcount mismatch: expected %lld != "
 585                     "actual %lld\n",
 586                     (longlong_t)expected_refcount,
 587                     (longlong_t)actual_refcount);
 588                 return (2);
 589         }
 590         return (0);
 591 }
 592
 593 static void
 594 dump_spacemap(objset_t *os, space_map_t *sm)
 595 {
 596         uint64_t alloc, offset, entry;
 597         char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
 598                             "INVALID", "INVALID", "INVALID", "INVALID" };
 599
 600         if (sm == NULL)
 601                 return;
 602
 603         /*
 604          * Print out the freelist entries in both encoded and decoded form.
 605          */
 606         alloc = 0;
 607         for (offset = 0; offset < space_map_length(sm);
 608             offset += sizeof (entry)) {
 609                 uint8_t mapshift = sm->sm_shift;
 610
 611                 VERIFY0(dmu_read(os, space_map_object(sm), offset,
 612                     sizeof (entry), &entry, DMU_READ_PREFETCH));
 613                 if (SM_DEBUG_DECODE(entry)) {
 614
 615                         (void) printf("\t    [%6llu] %s: txg %llu, pass %llu\n",
 616                             (u_longlong_t)(offset / sizeof (entry)),
 617                             ddata[SM_DEBUG_ACTION_DECODE(entry)],
 618                             (u_longlong_t)SM_DEBUG_TXG_DECODE(entry),
 619                             (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(entry));
 620                 } else {
 621                         (void) printf("\t    [%6llu]    %c  range:"
 622                             " %010llx-%010llx  size: %06llx\n",
 623                             (u_longlong_t)(offset / sizeof (entry)),
 624                             SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
 625                             (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
 626                             mapshift) + sm->sm_start),
 627                             (u_longlong_t)((SM_OFFSET_DECODE(entry) <<
 628                             mapshift) + sm->sm_start +
 629                             (SM_RUN_DECODE(entry) << mapshift)),
 630                             (u_longlong_t)(SM_RUN_DECODE(entry) << mapshift));
 631                         if (SM_TYPE_DECODE(entry) == SM_ALLOC)
 632                                 alloc += SM_RUN_DECODE(entry) << mapshift;
 633                         else
 634                                 alloc -= SM_RUN_DECODE(entry) << mapshift;
 635                 }
 636         }
 637         if (alloc != space_map_allocated(sm)) {
 638                 (void) printf("space_map_object alloc (%llu) INCONSISTENT "
 639                     "with space map summary (%llu)\n",
 640                     (u_longlong_t)space_map_allocated(sm), (u_longlong_t)alloc);
 641         }
 642 }
 643
 644 static void
 645 dump_metaslab_stats(metaslab_t *msp)
 646 {
 647         char maxbuf[32];
 648         range_tree_t *rt = msp->ms_tree;
 649         avl_tree_t *t = &msp->ms_size_tree;
 650         int free_pct = range_tree_space(rt) * 100 / msp->ms_size;
 651
 652         zdb_nicenum(metaslab_block_maxsize(msp), maxbuf);
 653
 654         (void) printf("\t %25s %10lu   %7s  %6s   %4s %4d%%\n",
 655             "segments", avl_numnodes(t), "maxsize", maxbuf,
 656             "freepct", free_pct);
 657         (void) printf("\tIn-memory histogram:\n");
 658         dump_histogram(rt->rt_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
 659 }
 660
 661 static void
 662 dump_metaslab(metaslab_t *msp)
 663 {
 664         vdev_t *vd = msp->ms_group->mg_vd;
 665         spa_t *spa = vd->vdev_spa;
 666         space_map_t *sm = msp->ms_sm;
 667         char freebuf[32];
 668
 669         zdb_nicenum(msp->ms_size - space_map_allocated(sm), freebuf);
 670
 671         (void) printf(
 672             "\tmetaslab %6llu   offset %12llx   spacemap %6llu   free    %5s\n",
 673             (u_longlong_t)msp->ms_id, (u_longlong_t)msp->ms_start,
 674             (u_longlong_t)space_map_object(sm), freebuf);
 675
 676         if (dump_opt['m'] > 2 && !dump_opt['L']) {
 677                 mutex_enter(&msp->ms_lock);
 678                 metaslab_load_wait(msp);
 679                 if (!msp->ms_loaded) {
 680                         VERIFY0(metaslab_load(msp));
 681                         range_tree_stat_verify(msp->ms_tree);
 682                 }
 683                 dump_metaslab_stats(msp);
 684                 metaslab_unload(msp);
 685                 mutex_exit(&msp->ms_lock);
 686         }
 687
 688         if (dump_opt['m'] > 1 && sm != NULL &&
 689             spa_feature_is_active(spa, SPA_FEATURE_SPACEMAP_HISTOGRAM)) {
 690                 /*
 691                  * The space map histogram represents free space in chunks
 692                  * of sm_shift (i.e. bucket 0 refers to 2^sm_shift).
 693                  */
 694                 (void) printf("\tOn-disk histogram:\t\tfragmentation %llu\n",
 695                     (u_longlong_t)msp->ms_fragmentation);
 696                 dump_histogram(sm->sm_phys->smp_histogram,
 697                     SPACE_MAP_HISTOGRAM_SIZE, sm->sm_shift);
 698         }
 699
 700         if (dump_opt['d'] > 5 || dump_opt['m'] > 3) {
 701                 ASSERT(msp->ms_size == (1ULL << vd->vdev_ms_shift));
 702
 703                 mutex_enter(&msp->ms_lock);
 704                 dump_spacemap(spa->spa_meta_objset, msp->ms_sm);
 705                 mutex_exit(&msp->ms_lock);
 706         }
 707 }
 708
 709 static void
 710 print_vdev_metaslab_header(vdev_t *vd)
 711 {
 712         (void) printf("\tvdev %10llu\n\t%-10s%5llu   %-19s   %-15s   %-10s\n",
 713             (u_longlong_t)vd->vdev_id,
 714             "metaslabs", (u_longlong_t)vd->vdev_ms_count,
 715             "offset", "spacemap", "free");
 716         (void) printf("\t%15s   %19s   %15s   %10s\n",
 717             "---------------", "-------------------",
 718             "---------------", "-------------");
 719 }
 720
 721 static void
 722 dump_metaslab_groups(spa_t *spa)
 723 {
 724         vdev_t *rvd = spa->spa_root_vdev;
 725         metaslab_class_t *mc = spa_normal_class(spa);
 726         uint64_t fragmentation;
 727
 728         metaslab_class_histogram_verify(mc);
 729
 730         for (int c = 0; c < rvd->vdev_children; c++) {
 731                 vdev_t *tvd = rvd->vdev_child[c];
 732                 metaslab_group_t *mg = tvd->vdev_mg;
 733
 734                 if (mg->mg_class != mc)
 735                         continue;
 736
 737                 metaslab_group_histogram_verify(mg);
 738                 mg->mg_fragmentation = metaslab_group_fragmentation(mg);
 739
 740                 (void) printf("\tvdev %10llu\t\tmetaslabs%5llu\t\t"
 741                     "fragmentation",
 742                     (u_longlong_t)tvd->vdev_id,
 743                     (u_longlong_t)tvd->vdev_ms_count);
 744                 if (mg->mg_fragmentation == ZFS_FRAG_INVALID) {
 745                         (void) printf("%3s\n", "-");
 746                 } else {
 747                         (void) printf("%3llu%%\n",
 748                             (u_longlong_t)mg->mg_fragmentation);
 749                 }
 750                 dump_histogram(mg->mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
 751         }
 752
 753         (void) printf("\tpool %s\tfragmentation", spa_name(spa));
 754         fragmentation = metaslab_class_fragmentation(mc);
 755         if (fragmentation == ZFS_FRAG_INVALID)
 756                 (void) printf("\t%3s\n", "-");
 757         else
 758                 (void) printf("\t%3llu%%\n", (u_longlong_t)fragmentation);
 759         dump_histogram(mc->mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
 760 }
 761
 762 static void
 763 dump_metaslabs(spa_t *spa)
 764 {
 765         vdev_t *vd, *rvd = spa->spa_root_vdev;
 766         uint64_t m, c = 0, children = rvd->vdev_children;
 767
 768         (void) printf("\nMetaslabs:\n");
 769
 770         if (!dump_opt['d'] && zopt_objects > 0) {
 771                 c = zopt_object[0];
 772
 773                 if (c >= children)
 774                         (void) fatal("bad vdev id: %llu", (u_longlong_t)c);
 775
 776                 if (zopt_objects > 1) {
 777                         vd = rvd->vdev_child[c];
 778                         print_vdev_metaslab_header(vd);
 779
 780                         for (m = 1; m < zopt_objects; m++) {
 781                                 if (zopt_object[m] < vd->vdev_ms_count)
 782                                         dump_metaslab(
 783                                             vd->vdev_ms[zopt_object[m]]);
 784                                 else
 785                                         (void) fprintf(stderr, "bad metaslab "
 786                                             "number %llu\n",
 787                                             (u_longlong_t)zopt_object[m]);
 788                         }
 789                         (void) printf("\n");
 790                         return;
 791                 }
 792                 children = c + 1;
 793         }
 794         for (; c < children; c++) {
 795                 vd = rvd->vdev_child[c];
 796                 print_vdev_metaslab_header(vd);
 797
 798                 for (m = 0; m < vd->vdev_ms_count; m++)
 799                         dump_metaslab(vd->vdev_ms[m]);
 800                 (void) printf("\n");
 801         }
 802 }
 803
 804 static void
 805 dump_dde(const ddt_t *ddt, const ddt_entry_t *dde, uint64_t index)
 806 {
 807         const ddt_phys_t *ddp = dde->dde_phys;
 808         const ddt_key_t *ddk = &dde->dde_key;
 809         char *types[4] = { "ditto", "single", "double", "triple" };
 810         char blkbuf[BP_SPRINTF_LEN];
 811         blkptr_t blk;
 812
 813         for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
 814                 if (ddp->ddp_phys_birth == 0)
 815                         continue;
 816                 ddt_bp_create(ddt->ddt_checksum, ddk, ddp, &blk);
 817                 snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
 818                 (void) printf("index %llx refcnt %llu %s %s\n",
 819                     (u_longlong_t)index, (u_longlong_t)ddp->ddp_refcnt,
 820                     types[p], blkbuf);
 821         }
 822 }
 823
 824 static void
 825 dump_dedup_ratio(const ddt_stat_t *dds)
 826 {
 827         double rL, rP, rD, D, dedup, compress, copies;
 828
 829         if (dds->dds_blocks == 0)
 830                 return;
 831
 832         rL = (double)dds->dds_ref_lsize;
 833         rP = (double)dds->dds_ref_psize;
 834         rD = (double)dds->dds_ref_dsize;
 835         D = (double)dds->dds_dsize;
 836
 837         dedup = rD / D;
 838         compress = rL / rP;
 839         copies = rD / rP;
 840
 841         (void) printf("dedup = %.2f, compress = %.2f, copies = %.2f, "
 842             "dedup * compress / copies = %.2f\n\n",
 843             dedup, compress, copies, dedup * compress / copies);
 844 }
 845
 846 static void
 847 dump_ddt(ddt_t *ddt, enum ddt_type type, enum ddt_class class)
 848 {
 849         char name[DDT_NAMELEN];
 850         ddt_entry_t dde;
 851         uint64_t walk = 0;
 852         dmu_object_info_t doi;
 853         uint64_t count, dspace, mspace;
 854         int error;
 855
 856         error = ddt_object_info(ddt, type, class, &doi);
 857
 858         if (error == ENOENT)
 859                 return;
 860         ASSERT(error == 0);
 861
 862         error = ddt_object_count(ddt, type, class, &count);
 863         ASSERT(error == 0);
 864         if (count == 0)
 865                 return;
 866
 867         dspace = doi.doi_physical_blocks_512 << 9;
 868         mspace = doi.doi_fill_count * doi.doi_data_block_size;
 869
 870         ddt_object_name(ddt, type, class, name);
 871
 872         (void) printf("%s: %llu entries, size %llu on disk, %llu in core\n",
 873             name,
 874             (u_longlong_t)count,
 875             (u_longlong_t)(dspace / count),
 876             (u_longlong_t)(mspace / count));
 877
 878         if (dump_opt['D'] < 3)
 879                 return;
 880
 881         zpool_dump_ddt(NULL, &ddt->ddt_histogram[type][class]);
 882
 883         if (dump_opt['D'] < 4)
 884                 return;
 885
 886         if (dump_opt['D'] < 5 && class == DDT_CLASS_UNIQUE)
 887                 return;
 888
 889         (void) printf("%s contents:\n\n", name);
 890
 891         while ((error = ddt_object_walk(ddt, type, class, &walk, &dde)) == 0)
 892                 dump_dde(ddt, &dde, walk);
 893
 894         ASSERT(error == ENOENT);
 895
 896         (void) printf("\n");
 897 }
 898
 899 static void
 900 dump_all_ddts(spa_t *spa)
 901 {
 902         ddt_histogram_t ddh_total = { 0 };
 903         ddt_stat_t dds_total = { 0 };
 904
 905         for (enum zio_checksum c = 0; c < ZIO_CHECKSUM_FUNCTIONS; c++) {
 906                 ddt_t *ddt = spa->spa_ddt[c];
 907                 for (enum ddt_type type = 0; type < DDT_TYPES; type++) {
 908                         for (enum ddt_class class = 0; class < DDT_CLASSES;
 909                             class++) {
 910                                 dump_ddt(ddt, type, class);
 911                         }
 912                 }
 913         }
 914
 915         ddt_get_dedup_stats(spa, &dds_total);
 916
 917         if (dds_total.dds_blocks == 0) {
 918                 (void) printf("All DDTs are empty\n");
 919                 return;
 920         }
 921
 922         (void) printf("\n");
 923
 924         if (dump_opt['D'] > 1) {
 925                 (void) printf("DDT histogram (aggregated over all DDTs):\n");
 926                 ddt_get_dedup_histogram(spa, &ddh_total);
 927                 zpool_dump_ddt(&dds_total, &ddh_total);
 928         }
 929
 930         dump_dedup_ratio(&dds_total);
 931 }
 932
 933 static void
 934 dump_dtl_seg(void *arg, uint64_t start, uint64_t size)
 935 {
 936         char *prefix = arg;
 937
 938         (void) printf("%s [%llu,%llu) length %llu\n",
 939             prefix,
 940             (u_longlong_t)start,
 941             (u_longlong_t)(start + size),
 942             (u_longlong_t)(size));
 943 }
 944
 945 static void
 946 dump_dtl(vdev_t *vd, int indent)
 947 {
 948         spa_t *spa = vd->vdev_spa;
 949         boolean_t required;
 950         char *name[DTL_TYPES] = { "missing", "partial", "scrub", "outage" };
 951         char prefix[256];
 952
 953         spa_vdev_state_enter(spa, SCL_NONE);
 954         required = vdev_dtl_required(vd);
 955         (void) spa_vdev_state_exit(spa, NULL, 0);
 956
 957         if (indent == 0)
 958                 (void) printf("\nDirty time logs:\n\n");
 959
 960         (void) printf("\t%*s%s [%s]\n", indent, "",
 961             vd->vdev_path ? vd->vdev_path :
 962             vd->vdev_parent ? vd->vdev_ops->vdev_op_type : spa_name(spa),
 963             required ? "DTL-required" : "DTL-expendable");
 964
 965         for (int t = 0; t < DTL_TYPES; t++) {
 966                 range_tree_t *rt = vd->vdev_dtl[t];
 967                 if (range_tree_space(rt) == 0)
 968                         continue;
 969                 (void) snprintf(prefix, sizeof (prefix), "\t%*s%s",
 970                     indent + 2, "", name[t]);
 971                 mutex_enter(rt->rt_lock);
 972                 range_tree_walk(rt, dump_dtl_seg, prefix);
 973                 mutex_exit(rt->rt_lock);
 974                 if (dump_opt['d'] > 5 && vd->vdev_children == 0)
 975                         dump_spacemap(spa->spa_meta_objset, vd->vdev_dtl_sm);
 976         }
 977
 978         for (int c = 0; c < vd->vdev_children; c++)
 979                 dump_dtl(vd->vdev_child[c], indent + 4);
 980 }
 981
 982 /* from spa_history.c: spa_history_create_obj() */
 983 #define HIS_BUF_LEN_DEF (128 << 10)
 984 #define HIS_BUF_LEN_MAX (1 << 30)
 985
 986 static void
 987 dump_history(spa_t *spa)
 988 {
 989         nvlist_t **events = NULL;
 990         char *buf = NULL;
 991         uint64_t bufsize = HIS_BUF_LEN_DEF;
 992         uint64_t resid, len, off = 0;
 993         uint_t num = 0;
 994         int error;
 995         time_t tsec;
 996         struct tm t;
 997         char tbuf[30];
 998         char internalstr[MAXPATHLEN];
 999
1000         if ((buf = malloc(bufsize)) == NULL)
1001                 (void) fprintf(stderr, "Unable to read history: "
1002                     "out of memory\n");
1003         do {
1004                 len = bufsize;
1005
1006                 if ((error = spa_history_get(spa, &off, &len, buf)) != 0) {
1007                         (void) fprintf(stderr, "Unable to read history: "
1008                             "error %d\n", error);
1009                         return;
1010                 }
1011
1012                 if (zpool_history_unpack(buf, len, &resid, &events, &num) != 0)
1013                         break;
1014                 off -= resid;
1015
1016                 /*
1017                  * If the history block is too big, double the buffer
1018                  * size and try again.
1019                  */
1020                 if (resid == len) {
1021                         free(buf);
1022                         buf = NULL;
1023
1024                         bufsize <<= 1;
1025                         if ((bufsize >= HIS_BUF_LEN_MAX) ||
1026                             ((buf = malloc(bufsize)) == NULL)) {
1027                                 (void) fprintf(stderr, "Unable to read history: "
1028                                     "out of memory\n");
1029                                 return;
1030                         }
1031                 }
1032         } while (len != 0);
1033         free(buf);
1034
1035         (void) printf("\nHistory:\n");
1036         for (int i = 0; i < num; i++) {
1037                 uint64_t time, txg, ievent;
1038                 char *cmd, *intstr;
1039                 boolean_t printed = B_FALSE;
1040
1041                 if (nvlist_lookup_uint64(events[i], ZPOOL_HIST_TIME,
1042                     &time) != 0)
1043                         goto next;
1044                 if (nvlist_lookup_string(events[i], ZPOOL_HIST_CMD,
1045                     &cmd) != 0) {
1046                         if (nvlist_lookup_uint64(events[i],
1047                             ZPOOL_HIST_INT_EVENT, &ievent) != 0)
1048                                 goto next;
1049                         verify(nvlist_lookup_uint64(events[i],
1050                             ZPOOL_HIST_TXG, &txg) == 0);
1051                         verify(nvlist_lookup_string(events[i],
1052                             ZPOOL_HIST_INT_STR, &intstr) == 0);
1053                         if (ievent >= ZFS_NUM_LEGACY_HISTORY_EVENTS)
1054                                 goto next;
1055
1056                         (void) snprintf(internalstr,
1057                             sizeof (internalstr),
1058                             "[internal %s txg:%lld] %s",
1059                             zfs_history_event_names[ievent], txg,
1060                             intstr);
1061                         cmd = internalstr;
1062                 }
1063                 tsec = time;
1064                 (void) localtime_r(&tsec, &t);
1065                 (void) strftime(tbuf, sizeof (tbuf), "%F.%T", &t);
1066                 (void) printf("%s %s\n", tbuf, cmd);
1067                 printed = B_TRUE;
1068
1069 next:
1070                 if (dump_opt['h'] > 1) {
1071                         if (!printed)
1072                                 (void) printf("unrecognized record:\n");
1073                         dump_nvlist(events[i], 2);
1074                 }
1075         }
1076 }
1077
1078 /*ARGSUSED*/
1079 static void
1080 dump_dnode(objset_t *os, uint64_t object, void *data, size_t size)
1081 {
1082 }
1083
1084 static uint64_t
1085 blkid2offset(const dnode_phys_t *dnp, const blkptr_t *bp,
1086     const zbookmark_phys_t *zb)
1087 {
1088         if (dnp == NULL) {
1089                 ASSERT(zb->zb_level < 0);
1090                 if (zb->zb_object == 0)
1091                         return (zb->zb_blkid);
1092                 return (zb->zb_blkid * BP_GET_LSIZE(bp));
1093         }
1094
1095         ASSERT(zb->zb_level >= 0);
1096
1097         return ((zb->zb_blkid <<
1098             (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) *
1099             dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
1100 }
1101
1102 static void
1103 snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp)
1104 {
1105         const dva_t *dva = bp->blk_dva;
1106         int ndvas = dump_opt['d'] > 5 ? BP_GET_NDVAS(bp) : 1;
1107
1108         if (dump_opt['b'] >= 6) {
1109                 snprintf_blkptr(blkbuf, buflen, bp);
1110                 return;
1111         }
1112
1113         if (BP_IS_EMBEDDED(bp)) {
1114                 (void) sprintf(blkbuf,
1115                     "EMBEDDED et=%u %llxL/%llxP B=%llu",
1116                     (int)BPE_GET_ETYPE(bp),
1117                     (u_longlong_t)BPE_GET_LSIZE(bp),
1118                     (u_longlong_t)BPE_GET_PSIZE(bp),
1119                     (u_longlong_t)bp->blk_birth);
1120                 return;
1121         }
1122
1123         blkbuf[0] = '\0';
1124         for (int i = 0; i < ndvas; i++)
1125                 (void) snprintf(blkbuf + strlen(blkbuf),
1126                     buflen - strlen(blkbuf), "%llu:%llx:%llx ",
1127                     (u_longlong_t)DVA_GET_VDEV(&dva[i]),
1128                     (u_longlong_t)DVA_GET_OFFSET(&dva[i]),
1129                     (u_longlong_t)DVA_GET_ASIZE(&dva[i]));
1130
1131         if (BP_IS_HOLE(bp)) {
1132                 (void) snprintf(blkbuf + strlen(blkbuf),
1133                     buflen - strlen(blkbuf), "B=%llu",
1134                     (u_longlong_t)bp->blk_birth);
1135         } else {
1136                 (void) snprintf(blkbuf + strlen(blkbuf),
1137                     buflen - strlen(blkbuf),
1138                     "%llxL/%llxP F=%llu B=%llu/%llu",
1139                     (u_longlong_t)BP_GET_LSIZE(bp),
1140                     (u_longlong_t)BP_GET_PSIZE(bp),
1141                     (u_longlong_t)BP_GET_FILL(bp),
1142                     (u_longlong_t)bp->blk_birth,
1143                     (u_longlong_t)BP_PHYSICAL_BIRTH(bp));
1144         }
1145 }
1146
1147 static void
1148 print_indirect(blkptr_t *bp, const zbookmark_phys_t *zb,
1149     const dnode_phys_t *dnp)
1150 {
1151         char blkbuf[BP_SPRINTF_LEN];
1152         int l;
1153
1154         if (!BP_IS_EMBEDDED(bp)) {
1155                 ASSERT3U(BP_GET_TYPE(bp), ==, dnp->dn_type);
1156                 ASSERT3U(BP_GET_LEVEL(bp), ==, zb->zb_level);
1157         }
1158
1159         (void) printf("%16llx ", (u_longlong_t)blkid2offset(dnp, bp, zb));
1160
1161         ASSERT(zb->zb_level >= 0);
1162
1163         for (l = dnp->dn_nlevels - 1; l >= -1; l--) {
1164                 if (l == zb->zb_level) {
1165                         (void) printf("L%llx", (u_longlong_t)zb->zb_level);
1166                 } else {
1167                         (void) printf(" ");
1168                 }
1169         }
1170
1171         snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1172         (void) printf("%s\n", blkbuf);
1173 }
1174
1175 static int
1176 visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
1177     blkptr_t *bp, const zbookmark_phys_t *zb)
1178 {
1179         int err = 0;
1180
1181         if (bp->blk_birth == 0)
1182                 return (0);
1183
1184         print_indirect(bp, zb, dnp);
1185
1186         if (BP_GET_LEVEL(bp) > 0 && !BP_IS_HOLE(bp)) {
1187                 arc_flags_t flags = ARC_FLAG_WAIT;
1188                 int i;
1189                 blkptr_t *cbp;
1190                 int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
1191                 arc_buf_t *buf;
1192                 uint64_t fill = 0;
1193
1194                 err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
1195                     ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
1196                 if (err)
1197                         return (err);
1198                 ASSERT(buf->b_data);
1199
1200                 /* recursively visit blocks below this */
1201                 cbp = buf->b_data;
1202                 for (i = 0; i < epb; i++, cbp++) {
1203                         zbookmark_phys_t czb;
1204
1205                         SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
1206                             zb->zb_level - 1,
1207                             zb->zb_blkid * epb + i);
1208                         err = visit_indirect(spa, dnp, cbp, &czb);
1209                         if (err)
1210                                 break;
1211                         fill += BP_GET_FILL(cbp);
1212                 }
1213                 if (!err)
1214                         ASSERT3U(fill, ==, BP_GET_FILL(bp));
1215                 (void) arc_buf_remove_ref(buf, &buf);
1216         }
1217
1218         return (err);
1219 }
1220
1221 /*ARGSUSED*/
1222 static void
1223 dump_indirect(dnode_t *dn)
1224 {
1225         dnode_phys_t *dnp = dn->dn_phys;
1226         int j;
1227         zbookmark_phys_t czb;
1228
1229         (void) printf("Indirect blocks:\n");
1230
1231         SET_BOOKMARK(&czb, dmu_objset_id(dn->dn_objset),
1232             dn->dn_object, dnp->dn_nlevels - 1, 0);
1233         for (j = 0; j < dnp->dn_nblkptr; j++) {
1234                 czb.zb_blkid = j;
1235                 (void) visit_indirect(dmu_objset_spa(dn->dn_objset), dnp,
1236                     &dnp->dn_blkptr[j], &czb);
1237         }
1238
1239         (void) printf("\n");
1240 }
1241
1242 /*ARGSUSED*/
1243 static void
1244 dump_dsl_dir(objset_t *os, uint64_t object, void *data, size_t size)
1245 {
1246         dsl_dir_phys_t *dd = data;
1247         time_t crtime;
1248         char nice[32];
1249
1250         if (dd == NULL)
1251                 return;
1252
1253         ASSERT3U(size, >=, sizeof (dsl_dir_phys_t));
1254
1255         crtime = dd->dd_creation_time;
1256         (void) printf("\t\tcreation_time = %s", ctime(&crtime));
1257         (void) printf("\t\thead_dataset_obj = %llu\n",
1258             (u_longlong_t)dd->dd_head_dataset_obj);
1259         (void) printf("\t\tparent_dir_obj = %llu\n",
1260             (u_longlong_t)dd->dd_parent_obj);
1261         (void) printf("\t\torigin_obj = %llu\n",
1262             (u_longlong_t)dd->dd_origin_obj);
1263         (void) printf("\t\tchild_dir_zapobj = %llu\n",
1264             (u_longlong_t)dd->dd_child_dir_zapobj);
1265         zdb_nicenum(dd->dd_used_bytes, nice);
1266         (void) printf("\t\tused_bytes = %s\n", nice);
1267         zdb_nicenum(dd->dd_compressed_bytes, nice);
1268         (void) printf("\t\tcompressed_bytes = %s\n", nice);
1269         zdb_nicenum(dd->dd_uncompressed_bytes, nice);
1270         (void) printf("\t\tuncompressed_bytes = %s\n", nice);
1271         zdb_nicenum(dd->dd_quota, nice);
1272         (void) printf("\t\tquota = %s\n", nice);
1273         zdb_nicenum(dd->dd_reserved, nice);
1274         (void) printf("\t\treserved = %s\n", nice);
1275         (void) printf("\t\tprops_zapobj = %llu\n",
1276             (u_longlong_t)dd->dd_props_zapobj);
1277         (void) printf("\t\tdeleg_zapobj = %llu\n",
1278             (u_longlong_t)dd->dd_deleg_zapobj);
1279         (void) printf("\t\tflags = %llx\n",
1280             (u_longlong_t)dd->dd_flags);
1281
1282 #define DO(which) \
1283         zdb_nicenum(dd->dd_used_breakdown[DD_USED_ ## which], nice); \
1284         (void) printf("\t\tused_breakdown[" #which "] = %s\n", nice)
1285         DO(HEAD);
1286         DO(SNAP);
1287         DO(CHILD);
1288         DO(CHILD_RSRV);
1289         DO(REFRSRV);
1290 #undef DO
1291 }
1292
1293 /*ARGSUSED*/
1294 static void
1295 dump_dsl_dataset(objset_t *os, uint64_t object, void *data, size_t size)
1296 {
1297         dsl_dataset_phys_t *ds = data;
1298         time_t crtime;
1299         char used[32], compressed[32], uncompressed[32], unique[32];
1300         char blkbuf[BP_SPRINTF_LEN];
1301
1302         if (ds == NULL)
1303                 return;
1304
1305         ASSERT(size == sizeof (*ds));
1306         crtime = ds->ds_creation_time;
1307         zdb_nicenum(ds->ds_referenced_bytes, used);
1308         zdb_nicenum(ds->ds_compressed_bytes, compressed);
1309         zdb_nicenum(ds->ds_uncompressed_bytes, uncompressed);
1310         zdb_nicenum(ds->ds_unique_bytes, unique);
1311         snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
1312
1313         (void) printf("\t\tdir_obj = %llu\n",
1314             (u_longlong_t)ds->ds_dir_obj);
1315         (void) printf("\t\tprev_snap_obj = %llu\n",
1316             (u_longlong_t)ds->ds_prev_snap_obj);
1317         (void) printf("\t\tprev_snap_txg = %llu\n",
1318             (u_longlong_t)ds->ds_prev_snap_txg);
1319         (void) printf("\t\tnext_snap_obj = %llu\n",
1320             (u_longlong_t)ds->ds_next_snap_obj);
1321         (void) printf("\t\tsnapnames_zapobj = %llu\n",
1322             (u_longlong_t)ds->ds_snapnames_zapobj);
1323         (void) printf("\t\tnum_children = %llu\n",
1324             (u_longlong_t)ds->ds_num_children);
1325         (void) printf("\t\tuserrefs_obj = %llu\n",
1326             (u_longlong_t)ds->ds_userrefs_obj);
1327         (void) printf("\t\tcreation_time = %s", ctime(&crtime));
1328         (void) printf("\t\tcreation_txg = %llu\n",
1329             (u_longlong_t)ds->ds_creation_txg);
1330         (void) printf("\t\tdeadlist_obj = %llu\n",
1331             (u_longlong_t)ds->ds_deadlist_obj);
1332         (void) printf("\t\tused_bytes = %s\n", used);
1333         (void) printf("\t\tcompressed_bytes = %s\n", compressed);
1334         (void) printf("\t\tuncompressed_bytes = %s\n", uncompressed);
1335         (void) printf("\t\tunique = %s\n", unique);
1336         (void) printf("\t\tfsid_guid = %llu\n",
1337             (u_longlong_t)ds->ds_fsid_guid);
1338         (void) printf("\t\tguid = %llu\n",
1339             (u_longlong_t)ds->ds_guid);
1340         (void) printf("\t\tflags = %llx\n",
1341             (u_longlong_t)ds->ds_flags);
1342         (void) printf("\t\tnext_clones_obj = %llu\n",
1343             (u_longlong_t)ds->ds_next_clones_obj);
1344         (void) printf("\t\tprops_obj = %llu\n",
1345             (u_longlong_t)ds->ds_props_obj);
1346         (void) printf("\t\tbp = %s\n", blkbuf);
1347 }
1348
1349 /* ARGSUSED */
1350 static int
1351 dump_bptree_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1352 {
1353         char blkbuf[BP_SPRINTF_LEN];
1354
1355         if (bp->blk_birth != 0) {
1356                 snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
1357                 (void) printf("\t%s\n", blkbuf);
1358         }
1359         return (0);
1360 }
1361
1362 static void
1363 dump_bptree(objset_t *os, uint64_t obj, char *name)
1364 {
1365         char bytes[32];
1366         bptree_phys_t *bt;
1367         dmu_buf_t *db;
1368
1369         if (dump_opt['d'] < 3)
1370                 return;
1371
1372         VERIFY3U(0, ==, dmu_bonus_hold(os, obj, FTAG, &db));
1373         bt = db->db_data;
1374         zdb_nicenum(bt->bt_bytes, bytes);
1375         (void) printf("\n    %s: %llu datasets, %s\n",
1376             name, (unsigned long long)(bt->bt_end - bt->bt_begin), bytes);
1377         dmu_buf_rele(db, FTAG);
1378
1379         if (dump_opt['d'] < 5)
1380                 return;
1381
1382         (void) printf("\n");
1383
1384         (void) bptree_iterate(os, obj, B_FALSE, dump_bptree_cb, NULL, NULL);
1385 }
1386
1387 /* ARGSUSED */
1388 static int
1389 dump_bpobj_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
1390 {
1391         char blkbuf[BP_SPRINTF_LEN];
1392
1393         ASSERT(bp->blk_birth != 0);
1394         snprintf_blkptr_compact(blkbuf, sizeof (blkbuf), bp);
1395         (void) printf("\t%s\n", blkbuf);
1396         return (0);
1397 }
1398
1399 static void
1400 dump_bpobj(bpobj_t *bpo, char *name, int indent)
1401 {
1402         char bytes[32];
1403         char comp[32];
1404         char uncomp[32];
1405
1406         if (dump_opt['d'] < 3)
1407                 return;
1408
1409         zdb_nicenum(bpo->bpo_phys->bpo_bytes, bytes);
1410         if (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_subobjs != 0) {
1411                 zdb_nicenum(bpo->bpo_phys->bpo_comp, comp);
1412                 zdb_nicenum(bpo->bpo_phys->bpo_uncomp, uncomp);
1413                 (void) printf("    %*s: object %llu, %llu local blkptrs, "
1414                     "%llu subobjs, %s (%s/%s comp)\n",
1415                     indent * 8, name,
1416                     (u_longlong_t)bpo->bpo_object,
1417                     (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1418                     (u_longlong_t)bpo->bpo_phys->bpo_num_subobjs,
1419                     bytes, comp, uncomp);
1420
1421                 for (uint64_t i = 0; i < bpo->bpo_phys->bpo_num_subobjs; i++) {
1422                         uint64_t subobj;
1423                         bpobj_t subbpo;
1424                         int error;
1425                         VERIFY0(dmu_read(bpo->bpo_os,
1426                             bpo->bpo_phys->bpo_subobjs,
1427                             i * sizeof (subobj), sizeof (subobj), &subobj, 0));
1428                         error = bpobj_open(&subbpo, bpo->bpo_os, subobj);
1429                         if (error != 0) {
1430                                 (void) printf("ERROR %u while trying to open "
1431                                     "subobj id %llu\n",
1432                                     error, (u_longlong_t)subobj);
1433                                 continue;
1434                         }
1435                         dump_bpobj(&subbpo, "subobj", indent + 1);
1436                         bpobj_close(&subbpo);
1437                 }
1438         } else {
1439                 (void) printf("    %*s: object %llu, %llu blkptrs, %s\n",
1440                     indent * 8, name,
1441                     (u_longlong_t)bpo->bpo_object,
1442                     (u_longlong_t)bpo->bpo_phys->bpo_num_blkptrs,
1443                     bytes);
1444         }
1445
1446         if (dump_opt['d'] < 5)
1447                 return;
1448
1449
1450         if (indent == 0) {
1451                 (void) bpobj_iterate_nofree(bpo, dump_bpobj_cb, NULL, NULL);
1452                 (void) printf("\n");
1453         }
1454 }
1455
1456 static void
1457 dump_deadlist(dsl_deadlist_t *dl)
1458 {
1459         dsl_deadlist_entry_t *dle;
1460         uint64_t unused;
1461         char bytes[32];
1462         char comp[32];
1463         char uncomp[32];
1464
1465         if (dump_opt['d'] < 3)
1466                 return;
1467
1468         if (dl->dl_oldfmt) {
1469                 dump_bpobj(&dl->dl_bpobj, "old-format deadlist", 0);
1470                 return;
1471         }
1472
1473         zdb_nicenum(dl->dl_phys->dl_used, bytes);
1474         zdb_nicenum(dl->dl_phys->dl_comp, comp);
1475         zdb_nicenum(dl->dl_phys->dl_uncomp, uncomp);
1476         (void) printf("\n    Deadlist: %s (%s/%s comp)\n",
1477             bytes, comp, uncomp);
1478
1479         if (dump_opt['d'] < 4)
1480                 return;
1481
1482         (void) printf("\n");
1483
1484         /* force the tree to be loaded */
1485         dsl_deadlist_space_range(dl, 0, UINT64_MAX, &unused, &unused, &unused);
1486
1487         for (dle = avl_first(&dl->dl_tree); dle;
1488             dle = AVL_NEXT(&dl->dl_tree, dle)) {
1489                 if (dump_opt['d'] >= 5) {
1490                         char buf[128];
1491                         (void) snprintf(buf, sizeof (buf), "mintxg %llu -> ",
1492                             (longlong_t)dle->dle_mintxg,
1493                             (longlong_t)dle->dle_bpobj.bpo_object);
1494
1495                         dump_bpobj(&dle->dle_bpobj, buf, 0);
1496                 } else {
1497                         (void) printf("mintxg %llu -> obj %llu\n",
1498                             (longlong_t)dle->dle_mintxg,
1499                             (longlong_t)dle->dle_bpobj.bpo_object);
1500
1501                 }
1502         }
1503 }
1504
1505 static avl_tree_t idx_tree;
1506 static avl_tree_t domain_tree;
1507 static boolean_t fuid_table_loaded;
1508 static boolean_t sa_loaded;
1509 sa_attr_type_t *sa_attr_table;
1510
1511 static void
1512 fuid_table_destroy()
1513 {
1514         if (fuid_table_loaded) {
1515                 zfs_fuid_table_destroy(&idx_tree, &domain_tree);
1516                 fuid_table_loaded = B_FALSE;
1517         }
1518 }
1519
1520 /*
1521  * print uid or gid information.
1522  * For normal POSIX id just the id is printed in decimal format.
1523  * For CIFS files with FUID the fuid is printed in hex followed by
1524  * the domain-rid string.
1525  */
1526 static void
1527 print_idstr(uint64_t id, const char *id_type)
1528 {
1529         if (FUID_INDEX(id)) {
1530                 char *domain;
1531
1532                 domain = zfs_fuid_idx_domain(&idx_tree, FUID_INDEX(id));
1533                 (void) printf("\t%s     %llx [%s-%d]\n", id_type,
1534                     (u_longlong_t)id, domain, (int)FUID_RID(id));
1535         } else {
1536                 (void) printf("\t%s     %llu\n", id_type, (u_longlong_t)id);
1537         }
1538
1539 }
1540
1541 static void
1542 dump_uidgid(objset_t *os, uint64_t uid, uint64_t gid)
1543 {
1544         uint32_t uid_idx, gid_idx;
1545
1546         uid_idx = FUID_INDEX(uid);
1547         gid_idx = FUID_INDEX(gid);
1548
1549         /* Load domain table, if not already loaded */
1550         if (!fuid_table_loaded && (uid_idx || gid_idx)) {
1551                 uint64_t fuid_obj;
1552
1553                 /* first find the fuid object.  It lives in the master node */
1554                 VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES,
1555                     8, 1, &fuid_obj) == 0);
1556                 zfs_fuid_avl_tree_create(&idx_tree, &domain_tree);
1557                 (void) zfs_fuid_table_load(os, fuid_obj,
1558                     &idx_tree, &domain_tree);
1559                 fuid_table_loaded = B_TRUE;
1560         }
1561
1562         print_idstr(uid, "uid");
1563         print_idstr(gid, "gid");
1564 }
1565
1566 /*ARGSUSED*/
1567 static void
1568 dump_znode(objset_t *os, uint64_t object, void *data, size_t size)
1569 {
1570         char path[MAXPATHLEN * 2];      /* allow for xattr and failure prefix */
1571         sa_handle_t *hdl;
1572         uint64_t xattr, rdev, gen;
1573         uint64_t uid, gid, mode, fsize, parent, links;
1574         uint64_t pflags;
1575         uint64_t acctm[2], modtm[2], chgtm[2], crtm[2];
1576         time_t z_crtime, z_atime, z_mtime, z_ctime;
1577         sa_bulk_attr_t bulk[12];
1578         int idx = 0;
1579         int error;
1580
1581         if (!sa_loaded) {
1582                 uint64_t sa_attrs = 0;
1583                 uint64_t version;
1584
1585                 VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZPL_VERSION_STR,
1586                     8, 1, &version) == 0);
1587                 if (version >= ZPL_VERSION_SA) {
1588                         VERIFY(zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS,
1589                             8, 1, &sa_attrs) == 0);
1590                 }
1591                 if ((error = sa_setup(os, sa_attrs, zfs_attr_table,
1592                     ZPL_END, &sa_attr_table)) != 0) {
1593                         (void) printf("sa_setup failed errno %d, can't "
1594                             "display znode contents\n", error);
1595                         return;
1596                 }
1597                 sa_loaded = B_TRUE;
1598         }
1599
1600         if (sa_handle_get(os, object, NULL, SA_HDL_PRIVATE, &hdl)) {
1601                 (void) printf("Failed to get handle for SA znode\n");
1602                 return;
1603         }
1604
1605         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_UID], NULL, &uid, 8);
1606         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GID], NULL, &gid, 8);
1607         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_LINKS], NULL,
1608             &links, 8);
1609         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_GEN], NULL, &gen, 8);
1610         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MODE], NULL,
1611             &mode, 8);
1612         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_PARENT],
1613             NULL, &parent, 8);
1614         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_SIZE], NULL,
1615             &fsize, 8);
1616         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_ATIME], NULL,
1617             acctm, 16);
1618         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_MTIME], NULL,
1619             modtm, 16);
1620         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CRTIME], NULL,
1621             crtm, 16);
1622         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_CTIME], NULL,
1623             chgtm, 16);
1624         SA_ADD_BULK_ATTR(bulk, idx, sa_attr_table[ZPL_FLAGS], NULL,
1625             &pflags, 8);
1626
1627         if (sa_bulk_lookup(hdl, bulk, idx)) {
1628                 (void) sa_handle_destroy(hdl);
1629                 return;
1630         }
1631
1632         error = zfs_obj_to_path(os, object, path, sizeof (path));
1633         if (error != 0) {
1634                 (void) snprintf(path, sizeof (path), "\?\?\?<object#%llu>",
1635                     (u_longlong_t)object);
1636         }
1637         if (dump_opt['d'] < 3) {
1638                 (void) printf("\t%s\n", path);
1639                 (void) sa_handle_destroy(hdl);
1640                 return;
1641         }
1642
1643         z_crtime = (time_t)crtm[0];
1644         z_atime = (time_t)acctm[0];
1645         z_mtime = (time_t)modtm[0];
1646         z_ctime = (time_t)chgtm[0];
1647
1648         (void) printf("\tpath   %s\n", path);
1649         dump_uidgid(os, uid, gid);
1650         (void) printf("\tatime  %s", ctime(&z_atime));
1651         (void) printf("\tmtime  %s", ctime(&z_mtime));
1652         (void) printf("\tctime  %s", ctime(&z_ctime));
1653         (void) printf("\tcrtime %s", ctime(&z_crtime));
1654         (void) printf("\tgen    %llu\n", (u_longlong_t)gen);
1655         (void) printf("\tmode   %llo\n", (u_longlong_t)mode);
1656         (void) printf("\tsize   %llu\n", (u_longlong_t)fsize);
1657         (void) printf("\tparent %llu\n", (u_longlong_t)parent);
1658         (void) printf("\tlinks  %llu\n", (u_longlong_t)links);
1659         (void) printf("\tpflags %llx\n", (u_longlong_t)pflags);
1660         if (sa_lookup(hdl, sa_attr_table[ZPL_XATTR], &xattr,
1661             sizeof (uint64_t)) == 0)
1662                 (void) printf("\txattr  %llu\n", (u_longlong_t)xattr);
1663         if (sa_lookup(hdl, sa_attr_table[ZPL_RDEV], &rdev,
1664             sizeof (uint64_t)) == 0)
1665                 (void) printf("\trdev   0x%016llx\n", (u_longlong_t)rdev);
1666         sa_handle_destroy(hdl);
1667 }
1668
1669 /*ARGSUSED*/
1670 static void
1671 dump_acl(objset_t *os, uint64_t object, void *data, size_t size)
1672 {
1673 }
1674
1675 /*ARGSUSED*/
1676 static void
1677 dump_dmu_objset(objset_t *os, uint64_t object, void *data, size_t size)
1678 {
1679 }
1680
1681 static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
1682         dump_none,              /* unallocated                  */
1683         dump_zap,               /* object directory             */
1684         dump_uint64,            /* object array                 */
1685         dump_none,              /* packed nvlist                */
1686         dump_packed_nvlist,     /* packed nvlist size           */
1687         dump_none,              /* bplist                       */
1688         dump_none,              /* bplist header                */
1689         dump_none,              /* SPA space map header         */
1690         dump_none,              /* SPA space map                */
1691         dump_none,              /* ZIL intent log               */
1692         dump_dnode,             /* DMU dnode                    */
1693         dump_dmu_objset,        /* DMU objset                   */
1694         dump_dsl_dir,           /* DSL directory                */
1695         dump_zap,               /* DSL directory child map      */
1696         dump_zap,               /* DSL dataset snap map         */
1697         dump_zap,               /* DSL props                    */
1698         dump_dsl_dataset,       /* DSL dataset                  */
1699         dump_znode,             /* ZFS znode                    */
1700         dump_acl,               /* ZFS V0 ACL                   */
1701         dump_uint8,             /* ZFS plain file               */
1702         dump_zpldir,            /* ZFS directory                */
1703         dump_zap,               /* ZFS master node              */
1704         dump_zap,               /* ZFS delete queue             */
1705         dump_uint8,             /* zvol object                  */
1706         dump_zap,               /* zvol prop                    */
1707         dump_uint8,             /* other uint8[]                */
1708         dump_uint64,            /* other uint64[]               */
1709         dump_zap,               /* other ZAP                    */
1710         dump_zap,               /* persistent error log         */
1711         dump_uint8,             /* SPA history                  */
1712         dump_history_offsets,   /* SPA history offsets          */
1713         dump_zap,               /* Pool properties              */
1714         dump_zap,               /* DSL permissions              */
1715         dump_acl,               /* ZFS ACL                      */
1716         dump_uint8,             /* ZFS SYSACL                   */
1717         dump_none,              /* FUID nvlist                  */
1718         dump_packed_nvlist,     /* FUID nvlist size             */
1719         dump_zap,               /* DSL dataset next clones      */
1720         dump_zap,               /* DSL scrub queue              */
1721         dump_zap,               /* ZFS user/group used          */
1722         dump_zap,               /* ZFS user/group quota         */
1723         dump_zap,               /* snapshot refcount tags       */
1724         dump_ddt_zap,           /* DDT ZAP object               */
1725         dump_zap,               /* DDT statistics               */
1726         dump_znode,             /* SA object                    */
1727         dump_zap,               /* SA Master Node               */
1728         dump_sa_attrs,          /* SA attribute registration    */
1729         dump_sa_layouts,        /* SA attribute layouts         */
1730         dump_zap,               /* DSL scrub translations       */
1731         dump_none,              /* fake dedup BP                */
1732         dump_zap,               /* deadlist                     */
1733         dump_none,              /* deadlist hdr                 */
1734         dump_zap,               /* dsl clones                   */
1735         dump_none,              /* bpobj subobjs                */
1736         dump_unknown,           /* Unknown type, must be last   */
1737 };
1738
1739 static void
1740 dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header)
1741 {
1742         dmu_buf_t *db = NULL;
1743         dmu_object_info_t doi;
1744         dnode_t *dn;
1745         void *bonus = NULL;
1746         size_t bsize = 0;
1747         char iblk[32], dblk[32], lsize[32], asize[32], fill[32];
1748         char bonus_size[32];
1749         char aux[50];
1750         int error;
1751
1752         if (*print_header) {
1753                 (void) printf("\n%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
1754                     "Object", "lvl", "iblk", "dblk", "dsize", "lsize",
1755                     "%full", "type");
1756                 *print_header = 0;
1757         }
1758
1759         if (object == 0) {
1760                 dn = DMU_META_DNODE(os);
1761         } else {
1762                 error = dmu_bonus_hold(os, object, FTAG, &db);
1763                 if (error)
1764                         fatal("dmu_bonus_hold(%llu) failed, errno %u",
1765                             object, error);
1766                 bonus = db->db_data;
1767                 bsize = db->db_size;
1768                 dn = DB_DNODE((dmu_buf_impl_t *)db);
1769         }
1770         dmu_object_info_from_dnode(dn, &doi);
1771
1772         zdb_nicenum(doi.doi_metadata_block_size, iblk);
1773         zdb_nicenum(doi.doi_data_block_size, dblk);
1774         zdb_nicenum(doi.doi_max_offset, lsize);
1775         zdb_nicenum(doi.doi_physical_blocks_512 << 9, asize);
1776         zdb_nicenum(doi.doi_bonus_size, bonus_size);
1777         (void) sprintf(fill, "%6.2f", 100.0 * doi.doi_fill_count *
1778             doi.doi_data_block_size / (object == 0 ? DNODES_PER_BLOCK : 1) /
1779             doi.doi_max_offset);
1780
1781         aux[0] = '\0';
1782
1783         if (doi.doi_checksum != ZIO_CHECKSUM_INHERIT || verbosity >= 6) {
1784                 (void) snprintf(aux + strlen(aux), sizeof (aux), " (K=%s)",
1785                     ZDB_CHECKSUM_NAME(doi.doi_checksum));
1786         }
1787
1788         if (doi.doi_compress != ZIO_COMPRESS_INHERIT || verbosity >= 6) {
1789                 (void) snprintf(aux + strlen(aux), sizeof (aux), " (Z=%s)",
1790                     ZDB_COMPRESS_NAME(doi.doi_compress));
1791         }
1792
1793         (void) printf("%10lld  %3u  %5s  %5s  %5s  %5s  %6s  %s%s\n",
1794             (u_longlong_t)object, doi.doi_indirection, iblk, dblk,
1795             asize, lsize, fill, ZDB_OT_NAME(doi.doi_type), aux);
1796
1797         if (doi.doi_bonus_type != DMU_OT_NONE && verbosity > 3) {
1798                 (void) printf("%10s  %3s  %5s  %5s  %5s  %5s  %6s  %s\n",
1799                     "", "", "", "", "", bonus_size, "bonus",
1800                     ZDB_OT_NAME(doi.doi_bonus_type));
1801         }
1802
1803         if (verbosity >= 4) {
1804                 (void) printf("\tdnode flags: %s%s%s\n",
1805                     (dn->dn_phys->dn_flags & DNODE_FLAG_USED_BYTES) ?
1806                     "USED_BYTES " : "",
1807                     (dn->dn_phys->dn_flags & DNODE_FLAG_USERUSED_ACCOUNTED) ?
1808                     "USERUSED_ACCOUNTED " : "",
1809                     (dn->dn_phys->dn_flags & DNODE_FLAG_SPILL_BLKPTR) ?
1810                     "SPILL_BLKPTR" : "");
1811                 (void) printf("\tdnode maxblkid: %llu\n",
1812                     (longlong_t)dn->dn_phys->dn_maxblkid);
1813
1814                 object_viewer[ZDB_OT_TYPE(doi.doi_bonus_type)](os, object,
1815                     bonus, bsize);
1816                 object_viewer[ZDB_OT_TYPE(doi.doi_type)](os, object, NULL, 0);
1817                 *print_header = 1;
1818         }
1819
1820         if (verbosity >= 5)
1821                 dump_indirect(dn);
1822
1823         if (verbosity >= 5) {
1824                 /*
1825                  * Report the list of segments that comprise the object.
1826                  */
1827                 uint64_t start = 0;
1828                 uint64_t end;
1829                 uint64_t blkfill = 1;
1830                 int minlvl = 1;
1831
1832                 if (dn->dn_type == DMU_OT_DNODE) {
1833                         minlvl = 0;
1834                         blkfill = DNODES_PER_BLOCK;
1835                 }
1836
1837                 for (;;) {
1838                         char segsize[32];
1839                         error = dnode_next_offset(dn,
1840                             0, &start, minlvl, blkfill, 0);
1841                         if (error)
1842                                 break;
1843                         end = start;
1844                         error = dnode_next_offset(dn,
1845                             DNODE_FIND_HOLE, &end, minlvl, blkfill, 0);
1846                         zdb_nicenum(end - start, segsize);
1847                         (void) printf("\t\tsegment [%016llx, %016llx)"
1848                             " size %5s\n", (u_longlong_t)start,
1849                             (u_longlong_t)end, segsize);
1850                         if (error)
1851                                 break;
1852                         start = end;
1853                 }
1854         }
1855
1856         if (db != NULL)
1857                 dmu_buf_rele(db, FTAG);
1858 }
1859
1860 static char *objset_types[DMU_OST_NUMTYPES] = {
1861         "NONE", "META", "ZPL", "ZVOL", "OTHER", "ANY" };
1862
1863 static void
1864 dump_dir(objset_t *os)
1865 {
1866         dmu_objset_stats_t dds;
1867         uint64_t object, object_count;
1868         uint64_t refdbytes, usedobjs, scratch;
1869         char numbuf[32];
1870         char blkbuf[BP_SPRINTF_LEN + 20];
1871         char osname[MAXNAMELEN];
1872         char *type = "UNKNOWN";
1873         int verbosity = dump_opt['d'];
1874         int print_header = 1;
1875         int i, error;
1876
1877         dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
1878         dmu_objset_fast_stat(os, &dds);
1879         dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
1880
1881         if (dds.dds_type < DMU_OST_NUMTYPES)
1882                 type = objset_types[dds.dds_type];
1883
1884         if (dds.dds_type == DMU_OST_META) {
1885                 dds.dds_creation_txg = TXG_INITIAL;
1886                 usedobjs = BP_GET_FILL(os->os_rootbp);
1887                 refdbytes = dsl_dir_phys(os->os_spa->spa_dsl_pool->dp_mos_dir)->
1888                     dd_used_bytes;
1889         } else {
1890                 dmu_objset_space(os, &refdbytes, &scratch, &usedobjs, &scratch);
1891         }
1892
1893         ASSERT3U(usedobjs, ==, BP_GET_FILL(os->os_rootbp));
1894
1895         zdb_nicenum(refdbytes, numbuf);
1896
1897         if (verbosity >= 4) {
1898                 (void) snprintf(blkbuf, sizeof (blkbuf), ", rootbp ");
1899                 (void) snprintf_blkptr(blkbuf + strlen(blkbuf),
1900                     sizeof (blkbuf) - strlen(blkbuf), os->os_rootbp);
1901         } else {
1902                 blkbuf[0] = '\0';
1903         }
1904
1905         dmu_objset_name(os, osname);
1906
1907         (void) printf("Dataset %s [%s], ID %llu, cr_txg %llu, "
1908             "%s, %llu objects%s\n",
1909             osname, type, (u_longlong_t)dmu_objset_id(os),
1910             (u_longlong_t)dds.dds_creation_txg,
1911             numbuf, (u_longlong_t)usedobjs, blkbuf);
1912
1913         if (zopt_objects != 0) {
1914                 for (i = 0; i < zopt_objects; i++)
1915                         dump_object(os, zopt_object[i], verbosity,
1916                             &print_header);
1917                 (void) printf("\n");
1918                 return;
1919         }
1920
1921         if (dump_opt['i'] != 0 || verbosity >= 2)
1922                 dump_intent_log(dmu_objset_zil(os));
1923
1924         if (dmu_objset_ds(os) != NULL)
1925                 dump_deadlist(&dmu_objset_ds(os)->ds_deadlist);
1926
1927         if (verbosity < 2)
1928                 return;
1929
1930         if (BP_IS_HOLE(os->os_rootbp))
1931                 return;
1932
1933         dump_object(os, 0, verbosity, &print_header);
1934         object_count = 0;
1935         if (DMU_USERUSED_DNODE(os) != NULL &&
1936             DMU_USERUSED_DNODE(os)->dn_type != 0) {
1937                 dump_object(os, DMU_USERUSED_OBJECT, verbosity, &print_header);
1938                 dump_object(os, DMU_GROUPUSED_OBJECT, verbosity, &print_header);
1939         }
1940
1941         object = 0;
1942         while ((error = dmu_object_next(os, &object, B_FALSE, 0)) == 0) {
1943                 dump_object(os, object, verbosity, &print_header);
1944                 object_count++;
1945         }
1946
1947         ASSERT3U(object_count, ==, usedobjs);
1948
1949         (void) printf("\n");
1950
1951         if (error != ESRCH) {
1952                 (void) fprintf(stderr, "dmu_object_next() = %d\n", error);
1953                 abort();
1954         }
1955 }
1956
1957 static void
1958 dump_uberblock(uberblock_t *ub, const char *header, const char *footer)
1959 {
1960         time_t timestamp = ub->ub_timestamp;
1961
1962         (void) printf(header ? header : "");
1963         (void) printf("\tmagic = %016llx\n", (u_longlong_t)ub->ub_magic);
1964         (void) printf("\tversion = %llu\n", (u_longlong_t)ub->ub_version);
1965         (void) printf("\ttxg = %llu\n", (u_longlong_t)ub->ub_txg);
1966         (void) printf("\tguid_sum = %llu\n", (u_longlong_t)ub->ub_guid_sum);
1967         (void) printf("\ttimestamp = %llu UTC = %s",
1968             (u_longlong_t)ub->ub_timestamp, asctime(localtime(&timestamp)));
1969         if (dump_opt['u'] >= 3) {
1970                 char blkbuf[BP_SPRINTF_LEN];
1971                 snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
1972                 (void) printf("\trootbp = %s\n", blkbuf);
1973         }
1974         (void) printf(footer ? footer : "");
1975 }
1976
1977 static void
1978 dump_config(spa_t *spa)
1979 {
1980         dmu_buf_t *db;
1981         size_t nvsize = 0;
1982         int error = 0;
1983
1984
1985         error = dmu_bonus_hold(spa->spa_meta_objset,
1986             spa->spa_config_object, FTAG, &db);
1987
1988         if (error == 0) {
1989                 nvsize = *(uint64_t *)db->db_data;
1990                 dmu_buf_rele(db, FTAG);
1991
1992                 (void) printf("\nMOS Configuration:\n");
1993                 dump_packed_nvlist(spa->spa_meta_objset,
1994                     spa->spa_config_object, (void *)&nvsize, 1);
1995         } else {
1996                 (void) fprintf(stderr, "dmu_bonus_hold(%llu) failed, errno %d",
1997                     (u_longlong_t)spa->spa_config_object, error);
1998         }
1999 }
2000
2001 static void
2002 dump_cachefile(const char *cachefile)
2003 {
2004         int fd;
2005         struct stat64 statbuf;
2006         char *buf;
2007         nvlist_t *config;
2008
2009         if ((fd = open64(cachefile, O_RDONLY)) < 0) {
2010                 (void) printf("cannot open '%s': %s\n", cachefile,
2011                     strerror(errno));
2012                 exit(1);
2013         }
2014
2015         if (fstat64(fd, &statbuf) != 0) {
2016                 (void) printf("failed to stat '%s': %s\n", cachefile,
2017                     strerror(errno));
2018                 exit(1);
2019         }
2020
2021         if ((buf = malloc(statbuf.st_size)) == NULL) {
2022                 (void) fprintf(stderr, "failed to allocate %llu bytes\n",
2023                     (u_longlong_t)statbuf.st_size);
2024                 exit(1);
2025         }
2026
2027         if (read(fd, buf, statbuf.st_size) != statbuf.st_size) {
2028                 (void) fprintf(stderr, "failed to read %llu bytes\n",
2029                     (u_longlong_t)statbuf.st_size);
2030                 exit(1);
2031         }
2032
2033         (void) close(fd);
2034
2035         if (nvlist_unpack(buf, statbuf.st_size, &config, 0) != 0) {
2036                 (void) fprintf(stderr, "failed to unpack nvlist\n");
2037                 exit(1);
2038         }
2039
2040         free(buf);
2041
2042         dump_nvlist(config, 0);
2043
2044         nvlist_free(config);
2045 }
2046
2047 #define ZDB_MAX_UB_HEADER_SIZE 32
2048
2049 static void
2050 dump_label_uberblocks(vdev_label_t *lbl, uint64_t ashift)
2051 {
2052         vdev_t vd;
2053         vdev_t *vdp = &vd;
2054         char header[ZDB_MAX_UB_HEADER_SIZE];
2055
2056         vd.vdev_ashift = ashift;
2057         vdp->vdev_top = vdp;
2058
2059         for (int i = 0; i < VDEV_UBERBLOCK_COUNT(vdp); i++) {
2060                 uint64_t uoff = VDEV_UBERBLOCK_OFFSET(vdp, i);
2061                 uberblock_t *ub = (void *)((char *)lbl + uoff);
2062
2063                 if (uberblock_verify(ub))
2064                         continue;
2065                 (void) snprintf(header, ZDB_MAX_UB_HEADER_SIZE,
2066                     "Uberblock[%d]\n", i);
2067                 dump_uberblock(ub, header, "");
2068         }
2069 }
2070
2071 static void
2072 dump_label(const char *dev)
2073 {
2074         int fd;
2075         vdev_label_t label;
2076         char *path, *buf = label.vl_vdev_phys.vp_nvlist;
2077         size_t buflen = sizeof (label.vl_vdev_phys.vp_nvlist);
2078         struct stat64 statbuf;
2079         uint64_t psize, ashift;
2080         int len = strlen(dev) + 1;
2081
2082         if (strncmp(dev, "/dev/dsk/", 9) == 0) {
2083                 len++;
2084                 path = malloc(len);
2085                 (void) snprintf(path, len, "%s%s", "/dev/rdsk/", dev + 9);
2086         } else {
2087                 path = strdup(dev);
2088         }
2089
2090         if ((fd = open64(path, O_RDONLY)) < 0) {
2091                 (void) printf("cannot open '%s': %s\n", path, strerror(errno));
2092                 free(path);
2093                 exit(1);
2094         }
2095
2096         if (fstat64(fd, &statbuf) != 0) {
2097                 (void) printf("failed to stat '%s': %s\n", path,
2098                     strerror(errno));
2099                 free(path);
2100                 (void) close(fd);
2101                 exit(1);
2102         }
2103
2104         if (S_ISBLK(statbuf.st_mode)) {
2105                 (void) printf("cannot use '%s': character device required\n",
2106                     path);
2107                 free(path);
2108                 (void) close(fd);
2109                 exit(1);
2110         }
2111
2112         psize = statbuf.st_size;
2113         psize = P2ALIGN(psize, (uint64_t)sizeof (vdev_label_t));
2114
2115         for (int l = 0; l < VDEV_LABELS; l++) {
2116                 nvlist_t *config = NULL;
2117
2118                 (void) printf("--------------------------------------------\n");
2119                 (void) printf("LABEL %d\n", l);
2120                 (void) printf("--------------------------------------------\n");
2121
2122                 if (pread64(fd, &label, sizeof (label),
2123                     vdev_label_offset(psize, l, 0)) != sizeof (label)) {
2124                         (void) printf("failed to read label %d\n", l);
2125                         continue;
2126                 }
2127
2128                 if (nvlist_unpack(buf, buflen, &config, 0) != 0) {
2129                         (void) printf("failed to unpack label %d\n", l);
2130                         ashift = SPA_MINBLOCKSHIFT;
2131                 } else {
2132                         nvlist_t *vdev_tree = NULL;
2133
2134                         dump_nvlist(config, 4);
2135                         if ((nvlist_lookup_nvlist(config,
2136                             ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) != 0) ||
2137                             (nvlist_lookup_uint64(vdev_tree,
2138                             ZPOOL_CONFIG_ASHIFT, &ashift) != 0))
2139                                 ashift = SPA_MINBLOCKSHIFT;
2140                         nvlist_free(config);
2141                 }
2142                 if (dump_opt['u'])
2143                         dump_label_uberblocks(&label, ashift);
2144         }
2145
2146         free(path);
2147         (void) close(fd);
2148 }
2149
2150 static uint64_t num_large_blocks;
2151
2152 /*ARGSUSED*/
2153 static int
2154 dump_one_dir(const char *dsname, void *arg)
2155 {
2156         int error;
2157         objset_t *os;
2158
2159         error = dmu_objset_own(dsname, DMU_OST_ANY, B_TRUE, FTAG, &os);
2160         if (error) {
2161                 (void) printf("Could not open %s, error %d\n", dsname, error);
2162                 return (0);
2163         }
2164         if (dmu_objset_ds(os)->ds_large_blocks)
2165                 num_large_blocks++;
2166         dump_dir(os);
2167         dmu_objset_disown(os, FTAG);
2168         fuid_table_destroy();
2169         sa_loaded = B_FALSE;
2170         return (0);
2171 }
2172
2173 /*
2174  * Block statistics.
2175  */
2176 #define PSIZE_HISTO_SIZE (SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 2)
2177 typedef struct zdb_blkstats {
2178         uint64_t zb_asize;
2179         uint64_t zb_lsize;
2180         uint64_t zb_psize;
2181         uint64_t zb_count;
2182         uint64_t zb_gangs;
2183         uint64_t zb_ditto_samevdev;
2184         uint64_t zb_psize_histogram[PSIZE_HISTO_SIZE];
2185 } zdb_blkstats_t;
2186
2187 /*
2188  * Extended object types to report deferred frees and dedup auto-ditto blocks.
2189  */
2190 #define ZDB_OT_DEFERRED (DMU_OT_NUMTYPES + 0)
2191 #define ZDB_OT_DITTO    (DMU_OT_NUMTYPES + 1)
2192 #define ZDB_OT_OTHER    (DMU_OT_NUMTYPES + 2)
2193 #define ZDB_OT_TOTAL    (DMU_OT_NUMTYPES + 3)
2194
2195 static char *zdb_ot_extname[] = {
2196         "deferred free",
2197         "dedup ditto",
2198         "other",
2199         "Total",
2200 };
2201
2202 #define ZB_TOTAL        DN_MAX_LEVELS
2203
2204 typedef struct zdb_cb {
2205         zdb_blkstats_t  zcb_type[ZB_TOTAL + 1][ZDB_OT_TOTAL + 1];
2206         uint64_t        zcb_dedup_asize;
2207         uint64_t        zcb_dedup_blocks;
2208         uint64_t        zcb_embedded_blocks[NUM_BP_EMBEDDED_TYPES];
2209         uint64_t        zcb_embedded_histogram[NUM_BP_EMBEDDED_TYPES]
2210             [BPE_PAYLOAD_SIZE];
2211         uint64_t        zcb_start;
2212         uint64_t        zcb_lastprint;
2213         uint64_t        zcb_totalasize;
2214         uint64_t        zcb_errors[256];
2215         int             zcb_readfails;
2216         int             zcb_haderrors;
2217         spa_t           *zcb_spa;
2218 } zdb_cb_t;
2219
2220 static void
2221 zdb_count_block(zdb_cb_t *zcb, zilog_t *zilog, const blkptr_t *bp,
2222     dmu_object_type_t type)
2223 {
2224         uint64_t refcnt = 0;
2225
2226         ASSERT(type < ZDB_OT_TOTAL);
2227
2228         if (zilog && zil_bp_tree_add(zilog, bp) != 0)
2229                 return;
2230
2231         for (int i = 0; i < 4; i++) {
2232                 int l = (i < 2) ? BP_GET_LEVEL(bp) : ZB_TOTAL;
2233                 int t = (i & 1) ? type : ZDB_OT_TOTAL;
2234                 int equal;
2235                 zdb_blkstats_t *zb = &zcb->zcb_type[l][t];
2236
2237                 zb->zb_asize += BP_GET_ASIZE(bp);
2238                 zb->zb_lsize += BP_GET_LSIZE(bp);
2239                 zb->zb_psize += BP_GET_PSIZE(bp);
2240                 zb->zb_count++;
2241
2242                 /*
2243                  * The histogram is only big enough to record blocks up to
2244                  * SPA_OLD_MAXBLOCKSIZE; larger blocks go into the last,
2245                  * "other", bucket.
2246                  */
2247                 int idx = BP_GET_PSIZE(bp) >> SPA_MINBLOCKSHIFT;
2248                 idx = MIN(idx, SPA_OLD_MAXBLOCKSIZE / SPA_MINBLOCKSIZE + 1);
2249                 zb->zb_psize_histogram[idx]++;
2250
2251                 zb->zb_gangs += BP_COUNT_GANG(bp);
2252
2253                 switch (BP_GET_NDVAS(bp)) {
2254                 case 2:
2255                         if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2256                             DVA_GET_VDEV(&bp->blk_dva[1]))
2257                                 zb->zb_ditto_samevdev++;
2258                         break;
2259                 case 3:
2260                         equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2261                             DVA_GET_VDEV(&bp->blk_dva[1])) +
2262                             (DVA_GET_VDEV(&bp->blk_dva[0]) ==
2263                             DVA_GET_VDEV(&bp->blk_dva[2])) +
2264                             (DVA_GET_VDEV(&bp->blk_dva[1]) ==
2265                             DVA_GET_VDEV(&bp->blk_dva[2]));
2266                         if (equal != 0)
2267                                 zb->zb_ditto_samevdev++;
2268                         break;
2269                 }
2270
2271         }
2272
2273         if (BP_IS_EMBEDDED(bp)) {
2274                 zcb->zcb_embedded_blocks[BPE_GET_ETYPE(bp)]++;
2275                 zcb->zcb_embedded_histogram[BPE_GET_ETYPE(bp)]
2276                     [BPE_GET_PSIZE(bp)]++;
2277                 return;
2278         }
2279
2280         if (dump_opt['L'])
2281                 return;
2282
2283         if (BP_GET_DEDUP(bp)) {
2284                 ddt_t *ddt;
2285                 ddt_entry_t *dde;
2286
2287                 ddt = ddt_select(zcb->zcb_spa, bp);
2288                 ddt_enter(ddt);
2289                 dde = ddt_lookup(ddt, bp, B_FALSE);
2290
2291                 if (dde == NULL) {
2292                         refcnt = 0;
2293                 } else {
2294                         ddt_phys_t *ddp = ddt_phys_select(dde, bp);
2295                         ddt_phys_decref(ddp);
2296                         refcnt = ddp->ddp_refcnt;
2297                         if (ddt_phys_total_refcnt(dde) == 0)
2298                                 ddt_remove(ddt, dde);
2299                 }
2300                 ddt_exit(ddt);
2301         }
2302
2303         VERIFY3U(zio_wait(zio_claim(NULL, zcb->zcb_spa,
2304             refcnt ? 0 : spa_first_txg(zcb->zcb_spa),
2305             bp, NULL, NULL, ZIO_FLAG_CANFAIL)), ==, 0);
2306 }
2307
2308 /* ARGSUSED */
2309 static void
2310 zdb_blkptr_done(zio_t *zio)
2311 {
2312         spa_t *spa = zio->io_spa;
2313         blkptr_t *bp = zio->io_bp;
2314         int ioerr = zio->io_error;
2315         zdb_cb_t *zcb = zio->io_private;
2316         zbookmark_phys_t *zb = &zio->io_bookmark;
2317
2318         zio_data_buf_free(zio->io_data, zio->io_size);
2319
2320         mutex_enter(&spa->spa_scrub_lock);
2321         spa->spa_scrub_inflight--;
2322         cv_broadcast(&spa->spa_scrub_io_cv);
2323
2324         if (ioerr && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) {
2325                 char blkbuf[BP_SPRINTF_LEN];
2326
2327                 zcb->zcb_haderrors = 1;
2328                 zcb->zcb_errors[ioerr]++;
2329
2330                 if (dump_opt['b'] >= 2)
2331                         snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2332                 else
2333                         blkbuf[0] = '\0';
2334
2335                 (void) printf("zdb_blkptr_cb: "
2336                     "Got error %d reading "
2337                     "<%llu, %llu, %lld, %llx> %s -- skipping\n",
2338                     ioerr,
2339                     (u_longlong_t)zb->zb_objset,
2340                     (u_longlong_t)zb->zb_object,
2341                     (u_longlong_t)zb->zb_level,
2342                     (u_longlong_t)zb->zb_blkid,
2343                     blkbuf);
2344         }
2345         mutex_exit(&spa->spa_scrub_lock);
2346 }
2347
2348 /* ARGSUSED */
2349 static int
2350 zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2351     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2352 {
2353         zdb_cb_t *zcb = arg;
2354         dmu_object_type_t type;
2355         boolean_t is_metadata;
2356
2357         if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
2358                 char blkbuf[BP_SPRINTF_LEN];
2359                 snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2360                 (void) printf("objset %llu object %llu "
2361                     "level %lld offset 0x%llx %s\n",
2362                     (u_longlong_t)zb->zb_objset,
2363                     (u_longlong_t)zb->zb_object,
2364                     (longlong_t)zb->zb_level,
2365                     (u_longlong_t)blkid2offset(dnp, bp, zb),
2366                     blkbuf);
2367         }
2368
2369         if (BP_IS_HOLE(bp))
2370                 return (0);
2371
2372         type = BP_GET_TYPE(bp);
2373
2374         zdb_count_block(zcb, zilog, bp,
2375             (type & DMU_OT_NEWTYPE) ? ZDB_OT_OTHER : type);
2376
2377         is_metadata = (BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type));
2378
2379         if (!BP_IS_EMBEDDED(bp) &&
2380             (dump_opt['c'] > 1 || (dump_opt['c'] && is_metadata))) {
2381                 size_t size = BP_GET_PSIZE(bp);
2382                 void *data = zio_data_buf_alloc(size);
2383                 int flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_SCRUB | ZIO_FLAG_RAW;
2384
2385                 /* If it's an intent log block, failure is expected. */
2386                 if (zb->zb_level == ZB_ZIL_LEVEL)
2387                         flags |= ZIO_FLAG_SPECULATIVE;
2388
2389                 mutex_enter(&spa->spa_scrub_lock);
2390                 while (spa->spa_scrub_inflight > max_inflight)
2391                         cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
2392                 spa->spa_scrub_inflight++;
2393                 mutex_exit(&spa->spa_scrub_lock);
2394
2395                 zio_nowait(zio_read(NULL, spa, bp, data, size,
2396                     zdb_blkptr_done, zcb, ZIO_PRIORITY_ASYNC_READ, flags, zb));
2397         }
2398
2399         zcb->zcb_readfails = 0;
2400
2401         /* only call gethrtime() every 100 blocks */
2402         static int iters;
2403         if (++iters > 100)
2404                 iters = 0;
2405         else
2406                 return (0);
2407
2408         if (dump_opt['b'] < 5 && gethrtime() > zcb->zcb_lastprint + NANOSEC) {
2409                 uint64_t now = gethrtime();
2410                 char buf[10];
2411                 uint64_t bytes = zcb->zcb_type[ZB_TOTAL][ZDB_OT_TOTAL].zb_asize;
2412                 int kb_per_sec =
2413                     1 + bytes / (1 + ((now - zcb->zcb_start) / 1000 / 1000));
2414                 int sec_remaining =
2415                     (zcb->zcb_totalasize - bytes) / 1024 / kb_per_sec;
2416
2417                 zfs_nicenum(bytes, buf, sizeof (buf));
2418                 (void) fprintf(stderr,
2419                     "\r%5s completed (%4dMB/s) "
2420                     "estimated time remaining: %uhr %02umin %02usec        ",
2421                     buf, kb_per_sec / 1024,
2422                     sec_remaining / 60 / 60,
2423                     sec_remaining / 60 % 60,
2424                     sec_remaining % 60);
2425
2426                 zcb->zcb_lastprint = now;
2427         }
2428
2429         return (0);
2430 }
2431
2432 static void
2433 zdb_leak(void *arg, uint64_t start, uint64_t size)
2434 {
2435         vdev_t *vd = arg;
2436
2437         (void) printf("leaked space: vdev %llu, offset 0x%llx, size %llu\n",
2438             (u_longlong_t)vd->vdev_id, (u_longlong_t)start, (u_longlong_t)size);
2439 }
2440
2441 static metaslab_ops_t zdb_metaslab_ops = {
2442         NULL    /* alloc */
2443 };
2444
2445 static void
2446 zdb_ddt_leak_init(spa_t *spa, zdb_cb_t *zcb)
2447 {
2448         ddt_bookmark_t ddb = { 0 };
2449         ddt_entry_t dde;
2450         int error;
2451
2452         while ((error = ddt_walk(spa, &ddb, &dde)) == 0) {
2453                 blkptr_t blk;
2454                 ddt_phys_t *ddp = dde.dde_phys;
2455
2456                 if (ddb.ddb_class == DDT_CLASS_UNIQUE)
2457                         return;
2458
2459                 ASSERT(ddt_phys_total_refcnt(&dde) > 1);
2460
2461                 for (int p = 0; p < DDT_PHYS_TYPES; p++, ddp++) {
2462                         if (ddp->ddp_phys_birth == 0)
2463                                 continue;
2464                         ddt_bp_create(ddb.ddb_checksum,
2465                             &dde.dde_key, ddp, &blk);
2466                         if (p == DDT_PHYS_DITTO) {
2467                                 zdb_count_block(zcb, NULL, &blk, ZDB_OT_DITTO);
2468                         } else {
2469                                 zcb->zcb_dedup_asize +=
2470                                     BP_GET_ASIZE(&blk) * (ddp->ddp_refcnt - 1);
2471                                 zcb->zcb_dedup_blocks++;
2472                         }
2473                 }
2474                 if (!dump_opt['L']) {
2475                         ddt_t *ddt = spa->spa_ddt[ddb.ddb_checksum];
2476                         ddt_enter(ddt);
2477                         VERIFY(ddt_lookup(ddt, &blk, B_TRUE) != NULL);
2478                         ddt_exit(ddt);
2479                 }
2480         }
2481
2482         ASSERT(error == ENOENT);
2483 }
2484
2485 static void
2486 zdb_leak_init(spa_t *spa, zdb_cb_t *zcb)
2487 {
2488         zcb->zcb_spa = spa;
2489
2490         if (!dump_opt['L']) {
2491                 vdev_t *rvd = spa->spa_root_vdev;
2492                 for (uint64_t c = 0; c < rvd->vdev_children; c++) {
2493                         vdev_t *vd = rvd->vdev_child[c];
2494                         for (uint64_t m = 0; m < vd->vdev_ms_count; m++) {
2495                                 metaslab_t *msp = vd->vdev_ms[m];
2496                                 mutex_enter(&msp->ms_lock);
2497                                 metaslab_unload(msp);
2498
2499                                 /*
2500                                  * For leak detection, we overload the metaslab
2501                                  * ms_tree to contain allocated segments
2502                                  * instead of free segments. As a result,
2503                                  * we can't use the normal metaslab_load/unload
2504                                  * interfaces.
2505                                  */
2506                                 if (msp->ms_sm != NULL) {
2507                                         (void) fprintf(stderr,
2508                                             "\rloading space map for "
2509                                             "vdev %llu of %llu, "
2510                                             "metaslab %llu of %llu ...",
2511                                             (longlong_t)c,
2512                                             (longlong_t)rvd->vdev_children,
2513                                             (longlong_t)m,
2514                                             (longlong_t)vd->vdev_ms_count);
2515
2516                                         msp->ms_ops = &zdb_metaslab_ops;
2517
2518                                         /*
2519                                          * We don't want to spend the CPU
2520                                          * manipulating the size-ordered
2521                                          * tree, so clear the range_tree
2522                                          * ops.
2523                                          */
2524                                         msp->ms_tree->rt_ops = NULL;
2525                                         VERIFY0(space_map_load(msp->ms_sm,
2526                                             msp->ms_tree, SM_ALLOC));
2527                                         msp->ms_loaded = B_TRUE;
2528                                 }
2529                                 mutex_exit(&msp->ms_lock);
2530                         }
2531                 }
2532                 (void) fprintf(stderr, "\n");
2533         }
2534
2535         spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2536
2537         zdb_ddt_leak_init(spa, zcb);
2538
2539         spa_config_exit(spa, SCL_CONFIG, FTAG);
2540 }
2541
2542 static void
2543 zdb_leak_fini(spa_t *spa)
2544 {
2545         if (!dump_opt['L']) {
2546                 vdev_t *rvd = spa->spa_root_vdev;
2547                 for (int c = 0; c < rvd->vdev_children; c++) {
2548                         vdev_t *vd = rvd->vdev_child[c];
2549                         for (int m = 0; m < vd->vdev_ms_count; m++) {
2550                                 metaslab_t *msp = vd->vdev_ms[m];
2551                                 mutex_enter(&msp->ms_lock);
2552
2553                                 /*
2554                                  * The ms_tree has been overloaded to
2555                                  * contain allocated segments. Now that we
2556                                  * finished traversing all blocks, any
2557                                  * block that remains in the ms_tree
2558                                  * represents an allocated block that we
2559                                  * did not claim during the traversal.
2560                                  * Claimed blocks would have been removed
2561                                  * from the ms_tree.
2562                                  */
2563                                 range_tree_vacate(msp->ms_tree, zdb_leak, vd);
2564                                 msp->ms_loaded = B_FALSE;
2565
2566                                 mutex_exit(&msp->ms_lock);
2567                         }
2568                 }
2569         }
2570 }
2571
2572 /* ARGSUSED */
2573 static int
2574 count_block_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
2575 {
2576         zdb_cb_t *zcb = arg;
2577
2578         if (dump_opt['b'] >= 5) {
2579                 char blkbuf[BP_SPRINTF_LEN];
2580                 snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
2581                 (void) printf("[%s] %s\n",
2582                     "deferred free", blkbuf);
2583         }
2584         zdb_count_block(zcb, NULL, bp, ZDB_OT_DEFERRED);
2585         return (0);
2586 }
2587
2588 static int
2589 dump_block_stats(spa_t *spa)
2590 {
2591         zdb_cb_t zcb = { 0 };
2592         zdb_blkstats_t *zb, *tzb;
2593         uint64_t norm_alloc, norm_space, total_alloc, total_found;
2594         int flags = TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_HARD;
2595         boolean_t leaks = B_FALSE;
2596
2597         (void) printf("\nTraversing all blocks %s%s%s%s%s...\n\n",
2598             (dump_opt['c'] || !dump_opt['L']) ? "to verify " : "",
2599             (dump_opt['c'] == 1) ? "metadata " : "",
2600             dump_opt['c'] ? "checksums " : "",
2601             (dump_opt['c'] && !dump_opt['L']) ? "and verify " : "",
2602             !dump_opt['L'] ? "nothing leaked " : "");
2603
2604         /*
2605          * Load all space maps as SM_ALLOC maps, then traverse the pool
2606          * claiming each block we discover.  If the pool is perfectly
2607          * consistent, the space maps will be empty when we're done.
2608          * Anything left over is a leak; any block we can't claim (because
2609          * it's not part of any space map) is a double allocation,
2610          * reference to a freed block, or an unclaimed log block.
2611          */
2612         zdb_leak_init(spa, &zcb);
2613
2614         /*
2615          * If there's a deferred-free bplist, process that first.
2616          */
2617         (void) bpobj_iterate_nofree(&spa->spa_deferred_bpobj,
2618             count_block_cb, &zcb, NULL);
2619         if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
2620                 (void) bpobj_iterate_nofree(&spa->spa_dsl_pool->dp_free_bpobj,
2621                     count_block_cb, &zcb, NULL);
2622         }
2623         if (spa_feature_is_active(spa, SPA_FEATURE_ASYNC_DESTROY)) {
2624                 VERIFY3U(0, ==, bptree_iterate(spa->spa_meta_objset,
2625                     spa->spa_dsl_pool->dp_bptree_obj, B_FALSE, count_block_cb,
2626                     &zcb, NULL));
2627         }
2628
2629         if (dump_opt['c'] > 1)
2630                 flags |= TRAVERSE_PREFETCH_DATA;
2631
2632         zcb.zcb_totalasize = metaslab_class_get_alloc(spa_normal_class(spa));
2633         zcb.zcb_start = zcb.zcb_lastprint = gethrtime();
2634         zcb.zcb_haderrors |= traverse_pool(spa, 0, flags, zdb_blkptr_cb, &zcb);
2635
2636         /*
2637          * If we've traversed the data blocks then we need to wait for those
2638          * I/Os to complete. We leverage "The Godfather" zio to wait on
2639          * all async I/Os to complete.
2640          */
2641         if (dump_opt['c']) {
2642                 for (int i = 0; i < max_ncpus; i++) {
2643                         (void) zio_wait(spa->spa_async_zio_root[i]);
2644                         spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
2645                             ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
2646                             ZIO_FLAG_GODFATHER);
2647                 }
2648         }
2649
2650         if (zcb.zcb_haderrors) {
2651                 (void) printf("\nError counts:\n\n");
2652                 (void) printf("\t%5s  %s\n", "errno", "count");
2653                 for (int e = 0; e < 256; e++) {
2654                         if (zcb.zcb_errors[e] != 0) {
2655                                 (void) printf("\t%5d  %llu\n",
2656                                     e, (u_longlong_t)zcb.zcb_errors[e]);
2657                         }
2658                 }
2659         }
2660
2661         /*
2662          * Report any leaked segments.
2663          */
2664         zdb_leak_fini(spa);
2665
2666         tzb = &zcb.zcb_type[ZB_TOTAL][ZDB_OT_TOTAL];
2667
2668         norm_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
2669         norm_space = metaslab_class_get_space(spa_normal_class(spa));
2670
2671         total_alloc = norm_alloc + metaslab_class_get_alloc(spa_log_class(spa));
2672         total_found = tzb->zb_asize - zcb.zcb_dedup_asize;
2673
2674         if (total_found == total_alloc) {
2675                 if (!dump_opt['L'])
2676                         (void) printf("\n\tNo leaks (block sum matches space"
2677                             " maps exactly)\n");
2678         } else {
2679                 (void) printf("block traversal size %llu != alloc %llu "
2680                     "(%s %lld)\n",
2681                     (u_longlong_t)total_found,
2682                     (u_longlong_t)total_alloc,
2683                     (dump_opt['L']) ? "unreachable" : "leaked",
2684                     (longlong_t)(total_alloc - total_found));
2685                 leaks = B_TRUE;
2686         }
2687
2688         if (tzb->zb_count == 0)
2689                 return (2);
2690
2691         (void) printf("\n");
2692         (void) printf("\tbp count:      %10llu\n",
2693             (u_longlong_t)tzb->zb_count);
2694         (void) printf("\tganged count:  %10llu\n",
2695             (longlong_t)tzb->zb_gangs);
2696         (void) printf("\tbp logical:    %10llu      avg: %6llu\n",
2697             (u_longlong_t)tzb->zb_lsize,
2698             (u_longlong_t)(tzb->zb_lsize / tzb->zb_count));
2699         (void) printf("\tbp physical:   %10llu      avg:"
2700             " %6llu     compression: %6.2f\n",
2701             (u_longlong_t)tzb->zb_psize,
2702             (u_longlong_t)(tzb->zb_psize / tzb->zb_count),
2703             (double)tzb->zb_lsize / tzb->zb_psize);
2704         (void) printf("\tbp allocated:  %10llu      avg:"
2705             " %6llu     compression: %6.2f\n",
2706             (u_longlong_t)tzb->zb_asize,
2707             (u_longlong_t)(tzb->zb_asize / tzb->zb_count),
2708             (double)tzb->zb_lsize / tzb->zb_asize);
2709         (void) printf("\tbp deduped:    %10llu    ref>1:"
2710             " %6llu   deduplication: %6.2f\n",
2711             (u_longlong_t)zcb.zcb_dedup_asize,
2712             (u_longlong_t)zcb.zcb_dedup_blocks,
2713             (double)zcb.zcb_dedup_asize / tzb->zb_asize + 1.0);
2714         (void) printf("\tSPA allocated: %10llu     used: %5.2f%%\n",
2715             (u_longlong_t)norm_alloc, 100.0 * norm_alloc / norm_space);
2716
2717         for (bp_embedded_type_t i = 0; i < NUM_BP_EMBEDDED_TYPES; i++) {
2718                 if (zcb.zcb_embedded_blocks[i] == 0)
2719                         continue;
2720                 (void) printf("\n");
2721                 (void) printf("\tadditional, non-pointer bps of type %u: "
2722                     "%10llu\n",
2723                     i, (u_longlong_t)zcb.zcb_embedded_blocks[i]);
2724
2725                 if (dump_opt['b'] >= 3) {
2726                         (void) printf("\t number of (compressed) bytes:  "
2727                             "number of bps\n");
2728                         dump_histogram(zcb.zcb_embedded_histogram[i],
2729                             sizeof (zcb.zcb_embedded_histogram[i]) /
2730                             sizeof (zcb.zcb_embedded_histogram[i][0]), 0);
2731                 }
2732         }
2733
2734         if (tzb->zb_ditto_samevdev != 0) {
2735                 (void) printf("\tDittoed blocks on same vdev: %llu\n",
2736                     (longlong_t)tzb->zb_ditto_samevdev);
2737         }
2738
2739         if (dump_opt['b'] >= 2) {
2740                 int l, t, level;
2741                 (void) printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2742                     "\t  avg\t comp\t%%Total\tType\n");
2743
2744                 for (t = 0; t <= ZDB_OT_TOTAL; t++) {
2745                         char csize[32], lsize[32], psize[32], asize[32];
2746                         char avg[32], gang[32];
2747                         char *typename;
2748
2749                         if (t < DMU_OT_NUMTYPES)
2750                                 typename = dmu_ot[t].ot_name;
2751                         else
2752                                 typename = zdb_ot_extname[t - DMU_OT_NUMTYPES];
2753
2754                         if (zcb.zcb_type[ZB_TOTAL][t].zb_asize == 0) {
2755                                 (void) printf("%6s\t%5s\t%5s\t%5s"
2756                                     "\t%5s\t%5s\t%6s\t%s\n",
2757                                     "-",
2758                                     "-",
2759                                     "-",
2760                                     "-",
2761                                     "-",
2762                                     "-",
2763                                     "-",
2764                                     typename);
2765                                 continue;
2766                         }
2767
2768                         for (l = ZB_TOTAL - 1; l >= -1; l--) {
2769                                 level = (l == -1 ? ZB_TOTAL : l);
2770                                 zb = &zcb.zcb_type[level][t];
2771
2772                                 if (zb->zb_asize == 0)
2773                                         continue;
2774
2775                                 if (dump_opt['b'] < 3 && level != ZB_TOTAL)
2776                                         continue;
2777
2778                                 if (level == 0 && zb->zb_asize ==
2779                                     zcb.zcb_type[ZB_TOTAL][t].zb_asize)
2780                                         continue;
2781
2782                                 zdb_nicenum(zb->zb_count, csize);
2783                                 zdb_nicenum(zb->zb_lsize, lsize);
2784                                 zdb_nicenum(zb->zb_psize, psize);
2785                                 zdb_nicenum(zb->zb_asize, asize);
2786                                 zdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2787                                 zdb_nicenum(zb->zb_gangs, gang);
2788
2789                                 (void) printf("%6s\t%5s\t%5s\t%5s\t%5s"
2790                                     "\t%5.2f\t%6.2f\t",
2791                                     csize, lsize, psize, asize, avg,
2792                                     (double)zb->zb_lsize / zb->zb_psize,
2793                                     100.0 * zb->zb_asize / tzb->zb_asize);
2794
2795                                 if (level == ZB_TOTAL)
2796                                         (void) printf("%s\n", typename);
2797                                 else
2798                                         (void) printf("    L%d %s\n",
2799                                             level, typename);
2800
2801                                 if (dump_opt['b'] >= 3 && zb->zb_gangs > 0) {
2802                                         (void) printf("\t number of ganged "
2803                                             "blocks: %s\n", gang);
2804                                 }
2805
2806                                 if (dump_opt['b'] >= 4) {
2807                                         (void) printf("psize "
2808                                             "(in 512-byte sectors): "
2809                                             "number of blocks\n");
2810                                         dump_histogram(zb->zb_psize_histogram,
2811                                             PSIZE_HISTO_SIZE, 0);
2812                                 }
2813                         }
2814                 }
2815         }
2816
2817         (void) printf("\n");
2818
2819         if (leaks)
2820                 return (2);
2821
2822         if (zcb.zcb_haderrors)
2823                 return (3);
2824
2825         return (0);
2826 }
2827
2828 typedef struct zdb_ddt_entry {
2829         ddt_key_t       zdde_key;
2830         uint64_t        zdde_ref_blocks;
2831         uint64_t        zdde_ref_lsize;
2832         uint64_t        zdde_ref_psize;
2833         uint64_t        zdde_ref_dsize;
2834         avl_node_t      zdde_node;
2835 } zdb_ddt_entry_t;
2836
2837 /* ARGSUSED */
2838 static int
2839 zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
2840     const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
2841 {
2842         avl_tree_t *t = arg;
2843         avl_index_t where;
2844         zdb_ddt_entry_t *zdde, zdde_search;
2845
2846         if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
2847                 return (0);
2848
2849         if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
2850                 (void) printf("traversing objset %llu, %llu objects, "
2851                     "%lu blocks so far\n",
2852                     (u_longlong_t)zb->zb_objset,
2853                     (u_longlong_t)BP_GET_FILL(bp),
2854                     avl_numnodes(t));
2855         }
2856
2857         if (BP_IS_HOLE(bp) || BP_GET_CHECKSUM(bp) == ZIO_CHECKSUM_OFF ||
2858             BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
2859                 return (0);
2860
2861         ddt_key_fill(&zdde_search.zdde_key, bp);
2862
2863         zdde = avl_find(t, &zdde_search, &where);
2864
2865         if (zdde == NULL) {
2866                 zdde = umem_zalloc(sizeof (*zdde), UMEM_NOFAIL);
2867                 zdde->zdde_key = zdde_search.zdde_key;
2868                 avl_insert(t, zdde, where);
2869         }
2870
2871         zdde->zdde_ref_blocks += 1;
2872         zdde->zdde_ref_lsize += BP_GET_LSIZE(bp);
2873         zdde->zdde_ref_psize += BP_GET_PSIZE(bp);
2874         zdde->zdde_ref_dsize += bp_get_dsize_sync(spa, bp);
2875
2876         return (0);
2877 }
2878
2879 static void
2880 dump_simulated_ddt(spa_t *spa)
2881 {
2882         avl_tree_t t;
2883         void *cookie = NULL;
2884         zdb_ddt_entry_t *zdde;
2885         ddt_histogram_t ddh_total = { 0 };
2886         ddt_stat_t dds_total = { 0 };
2887
2888         avl_create(&t, ddt_entry_compare,
2889             sizeof (zdb_ddt_entry_t), offsetof(zdb_ddt_entry_t, zdde_node));
2890
2891         spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2892
2893         (void) traverse_pool(spa, 0, TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
2894             zdb_ddt_add_cb, &t);
2895
2896         spa_config_exit(spa, SCL_CONFIG, FTAG);
2897
2898         while ((zdde = avl_destroy_nodes(&t, &cookie)) != NULL) {
2899                 ddt_stat_t dds;
2900                 uint64_t refcnt = zdde->zdde_ref_blocks;
2901                 ASSERT(refcnt != 0);
2902
2903                 dds.dds_blocks = zdde->zdde_ref_blocks / refcnt;
2904                 dds.dds_lsize = zdde->zdde_ref_lsize / refcnt;
2905                 dds.dds_psize = zdde->zdde_ref_psize / refcnt;
2906                 dds.dds_dsize = zdde->zdde_ref_dsize / refcnt;
2907
2908                 dds.dds_ref_blocks = zdde->zdde_ref_blocks;
2909                 dds.dds_ref_lsize = zdde->zdde_ref_lsize;
2910                 dds.dds_ref_psize = zdde->zdde_ref_psize;
2911                 dds.dds_ref_dsize = zdde->zdde_ref_dsize;
2912
2913                 ddt_stat_add(&ddh_total.ddh_stat[highbit64(refcnt) - 1],
2914                     &dds, 0);
2915
2916                 umem_free(zdde, sizeof (*zdde));
2917         }
2918
2919         avl_destroy(&t);
2920
2921         ddt_histogram_stat(&dds_total, &ddh_total);
2922
2923         (void) printf("Simulated DDT histogram:\n");
2924
2925         zpool_dump_ddt(&dds_total, &ddh_total);
2926
2927         dump_dedup_ratio(&dds_total);
2928 }
2929
2930 static void
2931 dump_zpool(spa_t *spa)
2932 {
2933         dsl_pool_t *dp = spa_get_dsl(spa);
2934         int rc = 0;
2935
2936         if (dump_opt['S']) {
2937                 dump_simulated_ddt(spa);
2938                 return;
2939         }
2940
2941         if (!dump_opt['e'] && dump_opt['C'] > 1) {
2942                 (void) printf("\nCached configuration:\n");
2943                 dump_nvlist(spa->spa_config, 8);
2944         }
2945
2946         if (dump_opt['C'])
2947                 dump_config(spa);
2948
2949         if (dump_opt['u'])
2950                 dump_uberblock(&spa->spa_uberblock, "\nUberblock:\n", "\n");
2951
2952         if (dump_opt['D'])
2953                 dump_all_ddts(spa);
2954
2955         if (dump_opt['d'] > 2 || dump_opt['m'])
2956                 dump_metaslabs(spa);
2957         if (dump_opt['M'])
2958                 dump_metaslab_groups(spa);
2959
2960         if (dump_opt['d'] || dump_opt['i']) {
2961                 uint64_t refcount;
2962                 dump_dir(dp->dp_meta_objset);
2963                 if (dump_opt['d'] >= 3) {
2964                         dump_bpobj(&spa->spa_deferred_bpobj,
2965                             "Deferred frees", 0);
2966                         if (spa_version(spa) >= SPA_VERSION_DEADLISTS) {
2967                                 dump_bpobj(&spa->spa_dsl_pool->dp_free_bpobj,
2968                                     "Pool snapshot frees", 0);
2969                         }
2970
2971                         if (spa_feature_is_active(spa,
2972                             SPA_FEATURE_ASYNC_DESTROY)) {
2973                                 dump_bptree(spa->spa_meta_objset,
2974                                     spa->spa_dsl_pool->dp_bptree_obj,
2975                                     "Pool dataset frees");
2976                         }
2977                         dump_dtl(spa->spa_root_vdev, 0);
2978                 }
2979                 (void) dmu_objset_find(spa_name(spa), dump_one_dir,
2980                     NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
2981
2982                 (void) feature_get_refcount(spa,
2983                     &spa_feature_table[SPA_FEATURE_LARGE_BLOCKS], &refcount);
2984                 if (num_large_blocks != refcount) {
2985                         (void) printf("large_blocks feature refcount mismatch: "
2986                             "expected %lld != actual %lld\n",
2987                             (longlong_t)num_large_blocks,
2988                             (longlong_t)refcount);
2989                         rc = 2;
2990                 } else {
2991                         (void) printf("Verified large_blocks feature refcount "
2992                             "is correct (%llu)\n", (longlong_t)refcount);
2993                 }
2994         }
2995         if (rc == 0 && (dump_opt['b'] || dump_opt['c']))
2996                 rc = dump_block_stats(spa);
2997
2998         if (rc == 0)
2999                 rc = verify_spacemap_refcounts(spa);
3000
3001         if (dump_opt['s'])
3002                 show_pool_stats(spa);
3003
3004         if (dump_opt['h'])
3005                 dump_history(spa);
3006
3007         if (rc != 0)
3008                 exit(rc);
3009 }
3010
3011 #define ZDB_FLAG_CHECKSUM       0x0001
3012 #define ZDB_FLAG_DECOMPRESS     0x0002
3013 #define ZDB_FLAG_BSWAP          0x0004
3014 #define ZDB_FLAG_GBH            0x0008
3015 #define ZDB_FLAG_INDIRECT       0x0010
3016 #define ZDB_FLAG_PHYS           0x0020
3017 #define ZDB_FLAG_RAW            0x0040
3018 #define ZDB_FLAG_PRINT_BLKPTR   0x0080
3019
3020 int flagbits[256];
3021
3022 static void
3023 zdb_print_blkptr(blkptr_t *bp, int flags)
3024 {
3025         char blkbuf[BP_SPRINTF_LEN];
3026
3027         if (flags & ZDB_FLAG_BSWAP)
3028                 byteswap_uint64_array((void *)bp, sizeof (blkptr_t));
3029
3030         snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
3031         (void) printf("%s\n", blkbuf);
3032 }
3033
3034 static void
3035 zdb_dump_indirect(blkptr_t *bp, int nbps, int flags)
3036 {
3037         int i;
3038
3039         for (i = 0; i < nbps; i++)
3040                 zdb_print_blkptr(&bp[i], flags);
3041 }
3042
3043 static void
3044 zdb_dump_gbh(void *buf, int flags)
3045 {
3046         zdb_dump_indirect((blkptr_t *)buf, SPA_GBH_NBLKPTRS, flags);
3047 }
3048
3049 static void
3050 zdb_dump_block_raw(void *buf, uint64_t size, int flags)
3051 {
3052         if (flags & ZDB_FLAG_BSWAP)
3053                 byteswap_uint64_array(buf, size);
3054         (void) write(1, buf, size);
3055 }
3056
3057 static void
3058 zdb_dump_block(char *label, void *buf, uint64_t size, int flags)
3059 {
3060         uint64_t *d = (uint64_t *)buf;
3061         int nwords = size / sizeof (uint64_t);
3062         int do_bswap = !!(flags & ZDB_FLAG_BSWAP);
3063         int i, j;
3064         char *hdr, *c;
3065
3066
3067         if (do_bswap)
3068                 hdr = " 7 6 5 4 3 2 1 0   f e d c b a 9 8";
3069         else
3070                 hdr = " 0 1 2 3 4 5 6 7   8 9 a b c d e f";
3071
3072         (void) printf("\n%s\n%6s   %s  0123456789abcdef\n", label, "", hdr);
3073
3074         for (i = 0; i < nwords; i += 2) {
3075                 (void) printf("%06llx:  %016llx  %016llx  ",
3076                     (u_longlong_t)(i * sizeof (uint64_t)),
3077                     (u_longlong_t)(do_bswap ? BSWAP_64(d[i]) : d[i]),
3078                     (u_longlong_t)(do_bswap ? BSWAP_64(d[i + 1]) : d[i + 1]));
3079
3080                 c = (char *)&d[i];
3081                 for (j = 0; j < 2 * sizeof (uint64_t); j++)
3082                         (void) printf("%c", isprint(c[j]) ? c[j] : '.');
3083                 (void) printf("\n");
3084         }
3085 }
3086
3087 /*
3088  * There are two acceptable formats:
3089  *      leaf_name         - For example: c1t0d0 or /tmp/ztest.0a
3090  *      child[.child]*    - For example: 0.1.1
3091  *
3092  * The second form can be used to specify arbitrary vdevs anywhere
3093  * in the heirarchy.  For example, in a pool with a mirror of
3094  * RAID-Zs, you can specify either RAID-Z vdev with 0.0 or 0.1 .
3095  */
3096 static vdev_t *
3097 zdb_vdev_lookup(vdev_t *vdev, char *path)
3098 {
3099         char *s, *p, *q;
3100         int i;
3101
3102         if (vdev == NULL)
3103                 return (NULL);
3104
3105         /* First, assume the x.x.x.x format */
3106         i = (int)strtoul(path, &s, 10);
3107         if (s == path || (s && *s != '.' && *s != '\0'))
3108                 goto name;
3109         if (i < 0 || i >= vdev->vdev_children)
3110                 return (NULL);
3111
3112         vdev = vdev->vdev_child[i];
3113         if (*s == '\0')
3114                 return (vdev);
3115         return (zdb_vdev_lookup(vdev, s+1));
3116
3117 name:
3118         for (i = 0; i < vdev->vdev_children; i++) {
3119                 vdev_t *vc = vdev->vdev_child[i];
3120
3121                 if (vc->vdev_path == NULL) {
3122                         vc = zdb_vdev_lookup(vc, path);
3123                         if (vc == NULL)
3124                                 continue;
3125                         else
3126                                 return (vc);
3127                 }
3128
3129                 p = strrchr(vc->vdev_path, '/');
3130                 p = p ? p + 1 : vc->vdev_path;
3131                 q = &vc->vdev_path[strlen(vc->vdev_path) - 2];
3132
3133                 if (strcmp(vc->vdev_path, path) == 0)
3134                         return (vc);
3135                 if (strcmp(p, path) == 0)
3136                         return (vc);
3137                 if (strcmp(q, "s0") == 0 && strncmp(p, path, q - p) == 0)
3138                         return (vc);
3139         }
3140
3141         return (NULL);
3142 }
3143
3144 /*
3145  * Read a block from a pool and print it out.  The syntax of the
3146  * block descriptor is:
3147  *
3148  *      pool:vdev_specifier:offset:size[:flags]
3149  *
3150  *      pool           - The name of the pool you wish to read from
3151  *      vdev_specifier - Which vdev (see comment for zdb_vdev_lookup)
3152  *      offset         - offset, in hex, in bytes
3153  *      size           - Amount of data to read, in hex, in bytes
3154  *      flags          - A string of characters specifying options
3155  *               b: Decode a blkptr at given offset within block
3156  *              *c: Calculate and display checksums
3157  *               d: Decompress data before dumping
3158  *               e: Byteswap data before dumping
3159  *               g: Display data as a gang block header
3160  *               i: Display as an indirect block
3161  *               p: Do I/O to physical offset
3162  *               r: Dump raw data to stdout
3163  *
3164  *              * = not yet implemented
3165  */
3166 static void
3167 zdb_read_block(char *thing, spa_t *spa)
3168 {
3169         blkptr_t blk, *bp = &blk;
3170         dva_t *dva = bp->blk_dva;
3171         int flags = 0;
3172         uint64_t offset = 0, size = 0, psize = 0, lsize = 0, blkptr_offset = 0;
3173         zio_t *zio;
3174         vdev_t *vd;
3175         void *pbuf, *lbuf, *buf;
3176         char *s, *p, *dup, *vdev, *flagstr;
3177         int i, error;
3178
3179         dup = strdup(thing);
3180         s = strtok(dup, ":");
3181         vdev = s ? s : "";
3182         s = strtok(NULL, ":");
3183         offset = strtoull(s ? s : "", NULL, 16);
3184         s = strtok(NULL, ":");
3185         size = strtoull(s ? s : "", NULL, 16);
3186         s = strtok(NULL, ":");
3187         flagstr = s ? s : "";
3188
3189         s = NULL;
3190         if (size == 0)
3191                 s = "size must not be zero";
3192         if (!IS_P2ALIGNED(size, DEV_BSIZE))
3193                 s = "size must be a multiple of sector size";
3194         if (!IS_P2ALIGNED(offset, DEV_BSIZE))
3195                 s = "offset must be a multiple of sector size";
3196         if (s) {
3197                 (void) printf("Invalid block specifier: %s  - %s\n", thing, s);
3198                 free(dup);
3199                 return;
3200         }
3201
3202         for (s = strtok(flagstr, ":"); s; s = strtok(NULL, ":")) {
3203                 for (i = 0; flagstr[i]; i++) {
3204                         int bit = flagbits[(uchar_t)flagstr[i]];
3205
3206                         if (bit == 0) {
3207                                 (void) printf("***Invalid flag: %c\n",
3208                                     flagstr[i]);
3209                                 continue;
3210                         }
3211                         flags |= bit;
3212
3213                         /* If it's not something with an argument, keep going */
3214                         if ((bit & (ZDB_FLAG_CHECKSUM |
3215                             ZDB_FLAG_PRINT_BLKPTR)) == 0)
3216                                 continue;
3217
3218                         p = &flagstr[i + 1];
3219                         if (bit == ZDB_FLAG_PRINT_BLKPTR)
3220                                 blkptr_offset = strtoull(p, &p, 16);
3221                         if (*p != ':' && *p != '\0') {
3222                                 (void) printf("***Invalid flag arg: '%s'\n", s);
3223                                 free(dup);
3224                                 return;
3225                         }
3226                         i += p - &flagstr[i + 1]; /* skip over the number */
3227                 }
3228         }
3229
3230         vd = zdb_vdev_lookup(spa->spa_root_vdev, vdev);
3231         if (vd == NULL) {
3232                 (void) printf("***Invalid vdev: %s\n", vdev);
3233                 free(dup);
3234                 return;
3235         } else {
3236                 if (vd->vdev_path)
3237                         (void) fprintf(stderr, "Found vdev: %s\n",
3238                             vd->vdev_path);
3239                 else
3240                         (void) fprintf(stderr, "Found vdev type: %s\n",
3241                             vd->vdev_ops->vdev_op_type);
3242         }
3243
3244         psize = size;
3245         lsize = size;
3246
3247         pbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3248         lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3249
3250         BP_ZERO(bp);
3251
3252         DVA_SET_VDEV(&dva[0], vd->vdev_id);
3253         DVA_SET_OFFSET(&dva[0], offset);
3254         DVA_SET_GANG(&dva[0], !!(flags & ZDB_FLAG_GBH));
3255         DVA_SET_ASIZE(&dva[0], vdev_psize_to_asize(vd, psize));
3256
3257         BP_SET_BIRTH(bp, TXG_INITIAL, TXG_INITIAL);
3258
3259         BP_SET_LSIZE(bp, lsize);
3260         BP_SET_PSIZE(bp, psize);
3261         BP_SET_COMPRESS(bp, ZIO_COMPRESS_OFF);
3262         BP_SET_CHECKSUM(bp, ZIO_CHECKSUM_OFF);
3263         BP_SET_TYPE(bp, DMU_OT_NONE);
3264         BP_SET_LEVEL(bp, 0);
3265         BP_SET_DEDUP(bp, 0);
3266         BP_SET_BYTEORDER(bp, ZFS_HOST_BYTEORDER);
3267
3268         spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
3269         zio = zio_root(spa, NULL, NULL, 0);
3270
3271         if (vd == vd->vdev_top) {
3272                 /*
3273                  * Treat this as a normal block read.
3274                  */
3275                 zio_nowait(zio_read(zio, spa, bp, pbuf, psize, NULL, NULL,
3276                     ZIO_PRIORITY_SYNC_READ,
3277                     ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL));
3278         } else {
3279                 /*
3280                  * Treat this as a vdev child I/O.
3281                  */
3282                 zio_nowait(zio_vdev_child_io(zio, bp, vd, offset, pbuf, psize,
3283                     ZIO_TYPE_READ, ZIO_PRIORITY_SYNC_READ,
3284                     ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE |
3285                     ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
3286                     ZIO_FLAG_CANFAIL | ZIO_FLAG_RAW, NULL, NULL));
3287         }
3288
3289         error = zio_wait(zio);
3290         spa_config_exit(spa, SCL_STATE, FTAG);
3291
3292         if (error) {
3293                 (void) printf("Read of %s failed, error: %d\n", thing, error);
3294                 goto out;
3295         }
3296
3297         if (flags & ZDB_FLAG_DECOMPRESS) {
3298                 /*
3299                  * We don't know how the data was compressed, so just try
3300                  * every decompress function at every inflated blocksize.
3301                  */
3302                 enum zio_compress c;
3303                 void *pbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3304                 void *lbuf2 = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
3305
3306                 bcopy(pbuf, pbuf2, psize);
3307
3308                 VERIFY(random_get_pseudo_bytes((uint8_t *)pbuf + psize,
3309                     SPA_MAXBLOCKSIZE - psize) == 0);
3310
3311                 VERIFY(random_get_pseudo_bytes((uint8_t *)pbuf2 + psize,
3312                     SPA_MAXBLOCKSIZE - psize) == 0);
3313
3314                 for (lsize = SPA_MAXBLOCKSIZE; lsize > psize;
3315                     lsize -= SPA_MINBLOCKSIZE) {
3316                         for (c = 0; c < ZIO_COMPRESS_FUNCTIONS; c++) {
3317                                 if (zio_decompress_data(c, pbuf, lbuf,
3318                                     psize, lsize) == 0 &&
3319                                     zio_decompress_data(c, pbuf2, lbuf2,
3320                                     psize, lsize) == 0 &&
3321                                     bcmp(lbuf, lbuf2, lsize) == 0)
3322                                         break;
3323                         }
3324                         if (c != ZIO_COMPRESS_FUNCTIONS)
3325                                 break;
3326                         lsize -= SPA_MINBLOCKSIZE;
3327                 }
3328
3329                 umem_free(pbuf2, SPA_MAXBLOCKSIZE);
3330                 umem_free(lbuf2, SPA_MAXBLOCKSIZE);
3331
3332                 if (lsize <= psize) {
3333                         (void) printf("Decompress of %s failed\n", thing);
3334                         goto out;
3335                 }
3336                 buf = lbuf;
3337                 size = lsize;
3338         } else {
3339                 buf = pbuf;
3340                 size = psize;
3341         }
3342
3343         if (flags & ZDB_FLAG_PRINT_BLKPTR)
3344                 zdb_print_blkptr((blkptr_t *)(void *)
3345                     ((uintptr_t)buf + (uintptr_t)blkptr_offset), flags);
3346         else if (flags & ZDB_FLAG_RAW)
3347                 zdb_dump_block_raw(buf, size, flags);
3348         else if (flags & ZDB_FLAG_INDIRECT)
3349                 zdb_dump_indirect((blkptr_t *)buf, size / sizeof (blkptr_t),
3350                     flags);
3351         else if (flags & ZDB_FLAG_GBH)
3352                 zdb_dump_gbh(buf, flags);
3353         else
3354                 zdb_dump_block(thing, buf, size, flags);
3355
3356 out:
3357         umem_free(pbuf, SPA_MAXBLOCKSIZE);
3358         umem_free(lbuf, SPA_MAXBLOCKSIZE);
3359         free(dup);
3360 }
3361
3362 static boolean_t
3363 pool_match(nvlist_t *cfg, char *tgt)
3364 {
3365         uint64_t v, guid = strtoull(tgt, NULL, 0);
3366         char *s;
3367
3368         if (guid != 0) {
3369                 if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0)
3370                         return (v == guid);
3371         } else {
3372                 if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0)
3373                         return (strcmp(s, tgt) == 0);
3374         }
3375         return (B_FALSE);
3376 }
3377
3378 static char *
3379 find_zpool(char **target, nvlist_t **configp, int dirc, char **dirv)
3380 {
3381         nvlist_t *pools;
3382         nvlist_t *match = NULL;
3383         char *name = NULL;
3384         char *sepp = NULL;
3385         char sep;
3386         int count = 0;
3387         importargs_t args = { 0 };
3388
3389         args.paths = dirc;
3390         args.path = dirv;
3391         args.can_be_active = B_TRUE;
3392
3393         if ((sepp = strpbrk(*target, "/@")) != NULL) {
3394                 sep = *sepp;
3395                 *sepp = '\0';
3396         }
3397
3398         pools = zpool_search_import(g_zfs, &args);
3399
3400         if (pools != NULL) {
3401                 nvpair_t *elem = NULL;
3402                 while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) {
3403                         verify(nvpair_value_nvlist(elem, configp) == 0);
3404                         if (pool_match(*configp, *target)) {
3405                                 count++;
3406                                 if (match != NULL) {
3407                                         /* print previously found config */
3408                                         if (name != NULL) {
3409                                                 (void) printf("%s\n", name);
3410                                                 dump_nvlist(match, 8);
3411                                                 name = NULL;
3412                                         }
3413                                         (void) printf("%s\n",
3414                                             nvpair_name(elem));
3415                                         dump_nvlist(*configp, 8);
3416                                 } else {
3417                                         match = *configp;
3418                                         name = nvpair_name(elem);
3419                                 }
3420                         }
3421                 }
3422         }
3423         if (count > 1)
3424                 (void) fatal("\tMatched %d pools - use pool GUID "
3425                     "instead of pool name or \n"
3426                     "\tpool name part of a dataset name to select pool", count);
3427
3428         if (sepp)
3429                 *sepp = sep;
3430         /*
3431          * If pool GUID was specified for pool id, replace it with pool name
3432          */
3433         if (name && (strstr(*target, name) != *target)) {
3434                 int sz = 1 + strlen(name) + ((sepp) ? strlen(sepp) : 0);
3435
3436                 *target = umem_alloc(sz, UMEM_NOFAIL);
3437                 (void) snprintf(*target, sz, "%s%s", name, sepp ? sepp : "");
3438         }
3439
3440         *configp = name ? match : NULL;
3441
3442         return (name);
3443 }
3444
3445 int
3446 main(int argc, char **argv)
3447 {
3448         int i, c;
3449         struct rlimit rl = { 1024, 1024 };
3450         spa_t *spa = NULL;
3451         objset_t *os = NULL;
3452         int dump_all = 1;
3453         int verbose = 0;
3454         int error = 0;
3455         char **searchdirs = NULL;
3456         int nsearch = 0;
3457         char *target;
3458         nvlist_t *policy = NULL;
3459         uint64_t max_txg = UINT64_MAX;
3460         int rewind = ZPOOL_NEVER_REWIND;
3461
3462         (void) setrlimit(RLIMIT_NOFILE, &rl);
3463         (void) enable_extended_FILE_stdio(-1, -1);
3464
3465         dprintf_setup(&argc, argv);
3466
3467         while ((c = getopt(argc, argv,
3468             "bcdhilmMI:suCDRSAFLXx:evp:t:U:P")) != -1) {
3469                 switch (c) {
3470                 case 'b':
3471                 case 'c':
3472                 case 'd':
3473                 case 'h':
3474                 case 'i':
3475                 case 'l':
3476                 case 'm':
3477                 case 's':
3478                 case 'u':
3479                 case 'C':
3480                 case 'D':
3481                 case 'M':
3482                 case 'R':
3483                 case 'S':
3484                         dump_opt[c]++;
3485                         dump_all = 0;
3486                         break;
3487                 case 'A':
3488                 case 'F':
3489                 case 'L':
3490                 case 'X':
3491                 case 'e':
3492                 case 'P':
3493                         dump_opt[c]++;
3494                         break;
3495                 case 'I':
3496                         max_inflight = strtoull(optarg, NULL, 0);
3497                         if (max_inflight == 0) {
3498                                 (void) fprintf(stderr, "maximum number "
3499                                     "of inflight I/Os must be greater "
3500                                     "than 0\n");
3501                                 usage();
3502                         }
3503                         break;
3504                 case 'p':
3505                         if (searchdirs == NULL) {
3506                                 searchdirs = umem_alloc(sizeof (char *),
3507                                     UMEM_NOFAIL);
3508                         } else {
3509                                 char **tmp = umem_alloc((nsearch + 1) *
3510                                     sizeof (char *), UMEM_NOFAIL);
3511                                 bcopy(searchdirs, tmp, nsearch *
3512                                     sizeof (char *));
3513                                 umem_free(searchdirs,
3514                                     nsearch * sizeof (char *));
3515                                 searchdirs = tmp;
3516                         }
3517                         searchdirs[nsearch++] = optarg;
3518                         break;
3519                 case 't':
3520                         max_txg = strtoull(optarg, NULL, 0);
3521                         if (max_txg < TXG_INITIAL) {
3522                                 (void) fprintf(stderr, "incorrect txg "
3523                                     "specified: %s\n", optarg);
3524                                 usage();
3525                         }
3526                         break;
3527                 case 'U':
3528                         spa_config_path = optarg;
3529                         break;
3530                 case 'v':
3531                         verbose++;
3532                         break;
3533                 case 'x':
3534                         vn_dumpdir = optarg;
3535                         break;
3536                 default:
3537                         usage();
3538                         break;
3539                 }
3540         }
3541
3542         if (!dump_opt['e'] && searchdirs != NULL) {
3543                 (void) fprintf(stderr, "-p option requires use of -e\n");
3544                 usage();
3545         }
3546
3547         /*
3548          * ZDB does not typically re-read blocks; therefore limit the ARC
3549          * to 256 MB, which can be used entirely for metadata.
3550          */
3551         zfs_arc_max = zfs_arc_meta_limit = 256 * 1024 * 1024;
3552
3553         /*
3554          * "zdb -c" uses checksum-verifying scrub i/os which are async reads.
3555          * "zdb -b" uses traversal prefetch which uses async reads.
3556          * For good performance, let several of them be active at once.
3557          */
3558         zfs_vdev_async_read_max_active = 10;
3559
3560         kernel_init(FREAD);
3561         g_zfs = libzfs_init();
3562         ASSERT(g_zfs != NULL);
3563
3564         if (dump_all)
3565                 verbose = MAX(verbose, 1);
3566
3567         for (c = 0; c < 256; c++) {
3568                 if (dump_all && !strchr("elAFLRSXP", c))
3569                         dump_opt[c] = 1;
3570                 if (dump_opt[c])
3571                         dump_opt[c] += verbose;
3572         }
3573
3574         aok = (dump_opt['A'] == 1) || (dump_opt['A'] > 2);
3575         zfs_recover = (dump_opt['A'] > 1);
3576
3577         argc -= optind;
3578         argv += optind;
3579
3580         if (argc < 2 && dump_opt['R'])
3581                 usage();
3582         if (argc < 1) {
3583                 if (!dump_opt['e'] && dump_opt['C']) {
3584                         dump_cachefile(spa_config_path);
3585                         return (0);
3586                 }
3587                 usage();
3588         }
3589
3590         if (dump_opt['l']) {
3591                 dump_label(argv[0]);
3592                 return (0);
3593         }
3594
3595         if (dump_opt['X'] || dump_opt['F'])
3596                 rewind = ZPOOL_DO_REWIND |
3597                     (dump_opt['X'] ? ZPOOL_EXTREME_REWIND : 0);
3598
3599         if (nvlist_alloc(&policy, NV_UNIQUE_NAME_TYPE, 0) != 0 ||
3600             nvlist_add_uint64(policy, ZPOOL_REWIND_REQUEST_TXG, max_txg) != 0 ||
3601             nvlist_add_uint32(policy, ZPOOL_REWIND_REQUEST, rewind) != 0)
3602                 fatal("internal error: %s", strerror(ENOMEM));
3603
3604         error = 0;
3605         target = argv[0];
3606
3607         if (dump_opt['e']) {
3608                 nvlist_t *cfg = NULL;
3609                 char *name = find_zpool(&target, &cfg, nsearch, searchdirs);
3610
3611                 error = ENOENT;
3612                 if (name) {
3613                         if (dump_opt['C'] > 1) {
3614                                 (void) printf("\nConfiguration for import:\n");
3615                                 dump_nvlist(cfg, 8);
3616                         }
3617                         if (nvlist_add_nvlist(cfg,
3618                             ZPOOL_REWIND_POLICY, policy) != 0) {
3619                                 fatal("can't open '%s': %s",
3620                                     target, strerror(ENOMEM));
3621                         }
3622                         if ((error = spa_import(name, cfg, NULL,
3623                             ZFS_IMPORT_MISSING_LOG)) != 0) {
3624                                 error = spa_import(name, cfg, NULL,
3625                                     ZFS_IMPORT_VERBATIM);
3626                         }
3627                 }
3628         }
3629
3630         if (error == 0) {
3631                 if (strpbrk(target, "/@") == NULL || dump_opt['R']) {
3632                         error = spa_open_rewind(target, &spa, FTAG, policy,
3633                             NULL);
3634                         if (error) {
3635                                 /*
3636                                  * If we're missing the log device then
3637                                  * try opening the pool after clearing the
3638                                  * log state.
3639                                  */
3640                                 mutex_enter(&spa_namespace_lock);
3641                                 if ((spa = spa_lookup(target)) != NULL &&
3642                                     spa->spa_log_state == SPA_LOG_MISSING) {
3643                                         spa->spa_log_state = SPA_LOG_CLEAR;
3644                                         error = 0;
3645                                 }
3646                                 mutex_exit(&spa_namespace_lock);
3647
3648                                 if (!error) {
3649                                         error = spa_open_rewind(target, &spa,
3650                                             FTAG, policy, NULL);
3651                                 }
3652                         }
3653                 } else {
3654                         error = dmu_objset_own(target, DMU_OST_ANY,
3655                             B_TRUE, FTAG, &os);
3656                 }
3657         }
3658         nvlist_free(policy);
3659
3660         if (error)
3661                 fatal("can't open '%s': %s", target, strerror(error));
3662
3663         argv++;
3664         argc--;
3665         if (!dump_opt['R']) {
3666                 if (argc > 0) {
3667                         zopt_objects = argc;
3668                         zopt_object = calloc(zopt_objects, sizeof (uint64_t));
3669                         for (i = 0; i < zopt_objects; i++) {
3670                                 errno = 0;
3671                                 zopt_object[i] = strtoull(argv[i], NULL, 0);
3672                                 if (zopt_object[i] == 0 && errno != 0)
3673                                         fatal("bad number %s: %s",
3674                                             argv[i], strerror(errno));
3675                         }
3676                 }
3677                 if (os != NULL) {
3678                         dump_dir(os);
3679                 } else if (zopt_objects > 0 && !dump_opt['m']) {
3680                         dump_dir(spa->spa_meta_objset);
3681                 } else {
3682                         dump_zpool(spa);
3683                 }
3684         } else {
3685                 flagbits['b'] = ZDB_FLAG_PRINT_BLKPTR;
3686                 flagbits['c'] = ZDB_FLAG_CHECKSUM;
3687                 flagbits['d'] = ZDB_FLAG_DECOMPRESS;
3688                 flagbits['e'] = ZDB_FLAG_BSWAP;
3689                 flagbits['g'] = ZDB_FLAG_GBH;
3690                 flagbits['i'] = ZDB_FLAG_INDIRECT;
3691                 flagbits['p'] = ZDB_FLAG_PHYS;
3692                 flagbits['r'] = ZDB_FLAG_RAW;
3693
3694                 for (i = 0; i < argc; i++)
3695                         zdb_read_block(argv[i], spa);
3696         }
3697
3698         (os != NULL) ? dmu_objset_disown(os, FTAG) : spa_close(spa, FTAG);
3699
3700         fuid_table_destroy();
3701         sa_loaded = B_FALSE;
3702
3703         libzfs_fini(g_zfs);
3704         kernel_fini();
3705
3706         return (0);
3707 }