1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 * Copyright (c) 2011, 2018 by Delphix. All rights reserved. 25 * Copyright (c) 2017, Joyent, Inc. All rights reserved. 26 */ 27 28 /* Portions Copyright 2010 Robert Milkowski */ 29 30 #include <mdb/mdb_ctf.h> 31 #include <sys/zfs_context.h> 32 #include <sys/mdb_modapi.h> 33 #include <sys/dbuf.h> 34 #include <sys/dmu_objset.h> 35 #include <sys/dsl_dir.h> 36 #include <sys/dsl_pool.h> 37 #include <sys/metaslab_impl.h> 38 #include <sys/space_map.h> 39 #include <sys/list.h> 40 #include <sys/vdev_impl.h> 41 #include <sys/zap_leaf.h> 42 #include <sys/zap_impl.h> 43 #include <ctype.h> 44 #include <sys/zfs_acl.h> 45 #include <sys/sa_impl.h> 46 #include <sys/multilist.h> 47 48 #ifdef _KERNEL 49 #define ZFS_OBJ_NAME "zfs" 50 extern int64_t mdb_gethrtime(void); 51 #else 52 #define ZFS_OBJ_NAME "libzpool.so.1" 53 #endif 54 55 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`" 56 57 #ifndef _KERNEL 58 int aok; 59 #endif 60 61 enum spa_flags { 62 SPA_FLAG_CONFIG = 1 << 0, 63 SPA_FLAG_VDEVS = 1 << 1, 64 SPA_FLAG_ERRORS = 1 << 2, 65 SPA_FLAG_METASLAB_GROUPS = 1 << 3, 66 SPA_FLAG_METASLABS = 1 << 4, 67 SPA_FLAG_HISTOGRAMS = 1 << 5 68 }; 69 70 /* 71 * If any of these flags are set, call spa_vdevs in spa_print 72 */ 73 #define SPA_FLAG_ALL_VDEV \ 74 (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \ 75 SPA_FLAG_METASLABS) 76 77 static int 78 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 79 const char *member, int len, void *buf) 80 { 81 mdb_ctf_id_t id; 82 ulong_t off; 83 char name[64]; 84 85 if (idp == NULL) { 86 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 87 mdb_warn("couldn't find type %s", type); 88 return (DCMD_ERR); 89 } 90 idp = &id; 91 } else { 92 type = name; 93 mdb_ctf_type_name(*idp, name, sizeof (name)); 94 } 95 96 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 97 mdb_warn("couldn't find member %s of type %s\n", member, type); 98 return (DCMD_ERR); 99 } 100 if (off % 8 != 0) { 101 mdb_warn("member %s of type %s is unsupported bitfield", 102 member, type); 103 return (DCMD_ERR); 104 } 105 off /= 8; 106 107 if (mdb_vread(buf, len, addr + off) == -1) { 108 mdb_warn("failed to read %s from %s at %p", 109 member, type, addr + off); 110 return (DCMD_ERR); 111 } 112 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 113 114 return (0); 115 } 116 117 #define GETMEMB(addr, structname, member, dest) \ 118 getmember(addr, ZFS_STRUCT structname, NULL, #member, \ 119 sizeof (dest), &(dest)) 120 121 #define GETMEMBID(addr, ctfid, member, dest) \ 122 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 123 124 static boolean_t 125 strisprint(const char *cp) 126 { 127 for (; *cp; cp++) { 128 if (!isprint(*cp)) 129 return (B_FALSE); 130 } 131 return (B_TRUE); 132 } 133 134 #define NICENUM_BUFLEN 6 135 136 static int 137 snprintfrac(char *buf, int len, 138 uint64_t numerator, uint64_t denom, int frac_digits) 139 { 140 int mul = 1; 141 int whole, frac, i; 142 143 for (i = frac_digits; i; i--) 144 mul *= 10; 145 whole = numerator / denom; 146 frac = mul * numerator / denom - mul * whole; 147 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); 148 } 149 150 static void 151 mdb_nicenum(uint64_t num, char *buf) 152 { 153 uint64_t n = num; 154 int index = 0; 155 char *u; 156 157 while (n >= 1024) { 158 n = (n + (1024 / 2)) / 1024; /* Round up or down */ 159 index++; 160 } 161 162 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; 163 164 if (index == 0) { 165 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", 166 (u_longlong_t)n); 167 } else if (n < 10 && (num & (num - 1)) != 0) { 168 (void) snprintfrac(buf, NICENUM_BUFLEN, 169 num, 1ULL << 10 * index, 2); 170 strcat(buf, u); 171 } else if (n < 100 && (num & (num - 1)) != 0) { 172 (void) snprintfrac(buf, NICENUM_BUFLEN, 173 num, 1ULL << 10 * index, 1); 174 strcat(buf, u); 175 } else { 176 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", 177 (u_longlong_t)n, u); 178 } 179 } 180 181 /* 182 * <addr>::sm_entries <buffer length in bytes> 183 * 184 * Treat the buffer specified by the given address as a buffer that contains 185 * space map entries. Iterate over the specified number of entries and print 186 * them in both encoded and decoded form. 187 */ 188 /* ARGSUSED */ 189 static int 190 sm_entries(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 191 { 192 uint64_t bufsz = 0; 193 boolean_t preview = B_FALSE; 194 195 if (!(flags & DCMD_ADDRSPEC)) 196 return (DCMD_USAGE); 197 198 if (argc < 1) { 199 preview = B_TRUE; 200 bufsz = 2; 201 } else if (argc != 1) { 202 return (DCMD_USAGE); 203 } else { 204 switch (argv[0].a_type) { 205 case MDB_TYPE_STRING: 206 bufsz = mdb_strtoull(argv[0].a_un.a_str); 207 break; 208 case MDB_TYPE_IMMEDIATE: 209 bufsz = argv[0].a_un.a_val; 210 break; 211 default: 212 return (DCMD_USAGE); 213 } 214 } 215 216 char *actions[] = { "ALLOC", "FREE", "INVALID" }; 217 for (uintptr_t bufend = addr + bufsz; addr < bufend; 218 addr += sizeof (uint64_t)) { 219 uint64_t nwords; 220 uint64_t start_addr = addr; 221 222 uint64_t word = 0; 223 if (mdb_vread(&word, sizeof (word), addr) == -1) { 224 mdb_warn("failed to read space map entry %p", addr); 225 return (DCMD_ERR); 226 } 227 228 if (SM_PREFIX_DECODE(word) == SM_DEBUG_PREFIX) { 229 (void) mdb_printf("\t [%6llu] %s: txg %llu, " 230 "pass %llu\n", 231 (u_longlong_t)(addr), 232 actions[SM_DEBUG_ACTION_DECODE(word)], 233 (u_longlong_t)SM_DEBUG_TXG_DECODE(word), 234 (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word)); 235 continue; 236 } 237 238 char entry_type; 239 uint64_t raw_offset, raw_run, vdev_id = SM_NO_VDEVID; 240 241 if (SM_PREFIX_DECODE(word) != SM2_PREFIX) { 242 entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ? 243 'A' : 'F'; 244 raw_offset = SM_OFFSET_DECODE(word); 245 raw_run = SM_RUN_DECODE(word); 246 nwords = 1; 247 } else { 248 ASSERT3U(SM_PREFIX_DECODE(word), ==, SM2_PREFIX); 249 250 raw_run = SM2_RUN_DECODE(word); 251 vdev_id = SM2_VDEV_DECODE(word); 252 253 /* it is a two-word entry so we read another word */ 254 addr += sizeof (uint64_t); 255 if (addr >= bufend) { 256 mdb_warn("buffer ends in the middle of a two " 257 "word entry\n", addr); 258 return (DCMD_ERR); 259 } 260 261 if (mdb_vread(&word, sizeof (word), addr) == -1) { 262 mdb_warn("failed to read space map entry %p", 263 addr); 264 return (DCMD_ERR); 265 } 266 267 entry_type = (SM2_TYPE_DECODE(word) == SM_ALLOC) ? 268 'A' : 'F'; 269 raw_offset = SM2_OFFSET_DECODE(word); 270 nwords = 2; 271 } 272 273 (void) mdb_printf("\t [%6llx] %c range:" 274 " %010llx-%010llx size: %06llx vdev: %06llu words: %llu\n", 275 (u_longlong_t)start_addr, 276 entry_type, (u_longlong_t)raw_offset, 277 (u_longlong_t)(raw_offset + raw_run), 278 (u_longlong_t)raw_run, 279 (u_longlong_t)vdev_id, (u_longlong_t)nwords); 280 281 if (preview) 282 break; 283 } 284 return (DCMD_OK); 285 } 286 287 static int 288 mdb_dsl_dir_name(uintptr_t addr, char *buf) 289 { 290 static int gotid; 291 static mdb_ctf_id_t dd_id; 292 uintptr_t dd_parent; 293 char dd_myname[ZFS_MAX_DATASET_NAME_LEN]; 294 295 if (!gotid) { 296 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir", 297 &dd_id) == -1) { 298 mdb_warn("couldn't find struct dsl_dir"); 299 return (DCMD_ERR); 300 } 301 gotid = TRUE; 302 } 303 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 304 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 305 return (DCMD_ERR); 306 } 307 308 if (dd_parent) { 309 if (mdb_dsl_dir_name(dd_parent, buf)) 310 return (DCMD_ERR); 311 strcat(buf, "/"); 312 } 313 314 if (dd_myname[0]) 315 strcat(buf, dd_myname); 316 else 317 strcat(buf, "???"); 318 319 return (0); 320 } 321 322 static int 323 objset_name(uintptr_t addr, char *buf) 324 { 325 static int gotid; 326 static mdb_ctf_id_t os_id, ds_id; 327 uintptr_t os_dsl_dataset; 328 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN]; 329 uintptr_t ds_dir; 330 331 buf[0] = '\0'; 332 333 if (!gotid) { 334 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset", 335 &os_id) == -1) { 336 mdb_warn("couldn't find struct objset"); 337 return (DCMD_ERR); 338 } 339 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset", 340 &ds_id) == -1) { 341 mdb_warn("couldn't find struct dsl_dataset"); 342 return (DCMD_ERR); 343 } 344 345 gotid = TRUE; 346 } 347 348 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset)) 349 return (DCMD_ERR); 350 351 if (os_dsl_dataset == 0) { 352 strcat(buf, "mos"); 353 return (0); 354 } 355 356 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 357 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 358 return (DCMD_ERR); 359 } 360 361 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf)) 362 return (DCMD_ERR); 363 364 if (ds_snapname[0]) { 365 strcat(buf, "@"); 366 strcat(buf, ds_snapname); 367 } 368 return (0); 369 } 370 371 static int 372 enum_lookup(char *type, int val, const char *prefix, size_t size, char *out) 373 { 374 const char *cp; 375 size_t len = strlen(prefix); 376 mdb_ctf_id_t enum_type; 377 378 if (mdb_ctf_lookup_by_name(type, &enum_type) != 0) { 379 mdb_warn("Could not find enum for %s", type); 380 return (-1); 381 } 382 383 if ((cp = mdb_ctf_enum_name(enum_type, val)) != NULL) { 384 if (strncmp(cp, prefix, len) == 0) 385 cp += len; 386 (void) strncpy(out, cp, size); 387 } else { 388 mdb_snprintf(out, size, "? (%d)", val); 389 } 390 return (0); 391 } 392 393 /* ARGSUSED */ 394 static int 395 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 396 { 397 /* 398 * This table can be approximately generated by running: 399 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 400 */ 401 static const char *params[] = { 402 "arc_lotsfree_percent", 403 "arc_pages_pp_reserve", 404 "arc_reduce_dnlc_percent", 405 "arc_swapfs_reserve", 406 "arc_zio_arena_free_shift", 407 "dbuf_cache_hiwater_pct", 408 "dbuf_cache_lowater_pct", 409 "dbuf_cache_max_bytes", 410 "dbuf_cache_max_shift", 411 "ddt_zap_indirect_blockshift", 412 "ddt_zap_leaf_blockshift", 413 "ditto_same_vdev_distance_shift", 414 "dmu_find_threads", 415 "dmu_rescan_dnode_threshold", 416 "dsl_scan_delay_completion", 417 "fzap_default_block_shift", 418 "l2arc_feed_again", 419 "l2arc_feed_min_ms", 420 "l2arc_feed_secs", 421 "l2arc_headroom", 422 "l2arc_headroom_boost", 423 "l2arc_noprefetch", 424 "l2arc_norw", 425 "l2arc_write_boost", 426 "l2arc_write_max", 427 "metaslab_aliquot", 428 "metaslab_bias_enabled", 429 "metaslab_debug_load", 430 "metaslab_debug_unload", 431 "metaslab_df_alloc_threshold", 432 "metaslab_df_free_pct", 433 "metaslab_fragmentation_factor_enabled", 434 "metaslab_force_ganging", 435 "metaslab_lba_weighting_enabled", 436 "metaslab_load_pct", 437 "metaslab_min_alloc_size", 438 "metaslab_ndf_clump_shift", 439 "metaslab_preload_enabled", 440 "metaslab_preload_limit", 441 "metaslab_trace_enabled", 442 "metaslab_trace_max_entries", 443 "metaslab_unload_delay", 444 "metaslabs_per_vdev", 445 "reference_history", 446 "reference_tracking_enable", 447 "send_holes_without_birth_time", 448 "spa_asize_inflation", 449 "spa_load_verify_data", 450 "spa_load_verify_maxinflight", 451 "spa_load_verify_metadata", 452 "spa_max_replication_override", 453 "spa_min_slop", 454 "spa_mode_global", 455 "spa_slop_shift", 456 "space_map_blksz", 457 "vdev_mirror_shift", 458 "zfetch_max_distance", 459 "zfs_abd_chunk_size", 460 "zfs_abd_scatter_enabled", 461 "zfs_arc_average_blocksize", 462 "zfs_arc_evict_batch_limit", 463 "zfs_arc_grow_retry", 464 "zfs_arc_max", 465 "zfs_arc_meta_limit", 466 "zfs_arc_meta_min", 467 "zfs_arc_min", 468 "zfs_arc_p_min_shift", 469 "zfs_arc_shrink_shift", 470 "zfs_async_block_max_blocks", 471 "zfs_ccw_retry_interval", 472 "zfs_commit_timeout_pct", 473 "zfs_compressed_arc_enabled", 474 "zfs_condense_indirect_commit_entry_delay_ticks", 475 "zfs_condense_indirect_vdevs_enable", 476 "zfs_condense_max_obsolete_bytes", 477 "zfs_condense_min_mapping_bytes", 478 "zfs_condense_pct", 479 "zfs_dbgmsg_maxsize", 480 "zfs_deadman_checktime_ms", 481 "zfs_deadman_enabled", 482 "zfs_deadman_synctime_ms", 483 "zfs_dedup_prefetch", 484 "zfs_default_bs", 485 "zfs_default_ibs", 486 "zfs_delay_max_ns", 487 "zfs_delay_min_dirty_percent", 488 "zfs_delay_resolution_ns", 489 "zfs_delay_scale", 490 "zfs_dirty_data_max", 491 "zfs_dirty_data_max_max", 492 "zfs_dirty_data_max_percent", 493 "zfs_dirty_data_sync", 494 "zfs_flags", 495 "zfs_free_bpobj_enabled", 496 "zfs_free_leak_on_eio", 497 "zfs_free_min_time_ms", 498 "zfs_fsync_sync_cnt", 499 "zfs_immediate_write_sz", 500 "zfs_indirect_condense_obsolete_pct", 501 "zfs_lua_check_instrlimit_interval", 502 "zfs_lua_max_instrlimit", 503 "zfs_lua_max_memlimit", 504 "zfs_max_recordsize", 505 "zfs_mdcomp_disable", 506 "zfs_metaslab_condense_block_threshold", 507 "zfs_metaslab_fragmentation_threshold", 508 "zfs_metaslab_segment_weight_enabled", 509 "zfs_metaslab_switch_threshold", 510 "zfs_mg_fragmentation_threshold", 511 "zfs_mg_noalloc_threshold", 512 "zfs_multilist_num_sublists", 513 "zfs_no_scrub_io", 514 "zfs_no_scrub_prefetch", 515 "zfs_nocacheflush", 516 "zfs_nopwrite_enabled", 517 "zfs_object_remap_one_indirect_delay_ticks", 518 "zfs_obsolete_min_time_ms", 519 "zfs_pd_bytes_max", 520 "zfs_per_txg_dirty_frees_percent", 521 "zfs_prefetch_disable", 522 "zfs_read_chunk_size", 523 "zfs_recover", 524 "zfs_recv_queue_length", 525 "zfs_redundant_metadata_most_ditto_level", 526 "zfs_remap_blkptr_enable", 527 "zfs_remove_max_copy_bytes", 528 "zfs_remove_max_segment", 529 "zfs_resilver_delay", 530 "zfs_resilver_min_time_ms", 531 "zfs_scan_idle", 532 "zfs_scan_min_time_ms", 533 "zfs_scrub_delay", 534 "zfs_scrub_limit", 535 "zfs_send_corrupt_data", 536 "zfs_send_queue_length", 537 "zfs_send_set_freerecords_bit", 538 "zfs_sync_pass_deferred_free", 539 "zfs_sync_pass_dont_compress", 540 "zfs_sync_pass_rewrite", 541 "zfs_sync_taskq_batch_pct", 542 "zfs_top_maxinflight", 543 "zfs_txg_timeout", 544 "zfs_vdev_aggregation_limit", 545 "zfs_vdev_async_read_max_active", 546 "zfs_vdev_async_read_min_active", 547 "zfs_vdev_async_write_active_max_dirty_percent", 548 "zfs_vdev_async_write_active_min_dirty_percent", 549 "zfs_vdev_async_write_max_active", 550 "zfs_vdev_async_write_min_active", 551 "zfs_vdev_cache_bshift", 552 "zfs_vdev_cache_max", 553 "zfs_vdev_cache_size", 554 "zfs_vdev_max_active", 555 "zfs_vdev_queue_depth_pct", 556 "zfs_vdev_read_gap_limit", 557 "zfs_vdev_removal_max_active", 558 "zfs_vdev_removal_min_active", 559 "zfs_vdev_scrub_max_active", 560 "zfs_vdev_scrub_min_active", 561 "zfs_vdev_sync_read_max_active", 562 "zfs_vdev_sync_read_min_active", 563 "zfs_vdev_sync_write_max_active", 564 "zfs_vdev_sync_write_min_active", 565 "zfs_vdev_write_gap_limit", 566 "zfs_write_implies_delete_child", 567 "zfs_zil_clean_taskq_maxalloc", 568 "zfs_zil_clean_taskq_minalloc", 569 "zfs_zil_clean_taskq_nthr_pct", 570 "zil_replay_disable", 571 "zil_slog_bulk", 572 "zio_buf_debug_limit", 573 "zio_dva_throttle_enabled", 574 "zio_injection_enabled", 575 "zvol_immediate_write_sz", 576 "zvol_maxphys", 577 "zvol_unmap_enabled", 578 "zvol_unmap_sync_enabled", 579 "zfs_max_dataset_nesting", 580 }; 581 582 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 583 int sz; 584 uint64_t val64; 585 uint32_t *val32p = (uint32_t *)&val64; 586 587 sz = mdb_readvar(&val64, params[i]); 588 if (sz == 4) { 589 mdb_printf("%s = 0x%x\n", params[i], *val32p); 590 } else if (sz == 8) { 591 mdb_printf("%s = 0x%llx\n", params[i], val64); 592 } else { 593 mdb_warn("variable %s not found", params[i]); 594 } 595 } 596 597 return (DCMD_OK); 598 } 599 600 /* ARGSUSED */ 601 static int 602 dva(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 603 { 604 dva_t dva; 605 if (mdb_vread(&dva, sizeof (dva_t), addr) == -1) { 606 mdb_warn("failed to read dva_t"); 607 return (DCMD_ERR); 608 } 609 mdb_printf("<%llu:%llx:%llx>\n", 610 (u_longlong_t)DVA_GET_VDEV(&dva), 611 (u_longlong_t)DVA_GET_OFFSET(&dva), 612 (u_longlong_t)DVA_GET_ASIZE(&dva)); 613 614 return (DCMD_OK); 615 } 616 617 /* ARGSUSED */ 618 static int 619 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 620 { 621 char type[80], checksum[80], compress[80]; 622 blkptr_t blk, *bp = &blk; 623 char buf[BP_SPRINTF_LEN]; 624 625 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { 626 mdb_warn("failed to read blkptr_t"); 627 return (DCMD_ERR); 628 } 629 630 if (enum_lookup("enum dmu_object_type", BP_GET_TYPE(bp), "DMU_OT_", 631 sizeof (type), type) == -1 || 632 enum_lookup("enum zio_checksum", BP_GET_CHECKSUM(bp), 633 "ZIO_CHECKSUM_", sizeof (checksum), checksum) == -1 || 634 enum_lookup("enum zio_compress", BP_GET_COMPRESS(bp), 635 "ZIO_COMPRESS_", sizeof (compress), compress) == -1) { 636 mdb_warn("Could not find blkptr enumerated types"); 637 return (DCMD_ERR); 638 } 639 640 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type, 641 checksum, compress); 642 643 mdb_printf("%s\n", buf); 644 645 return (DCMD_OK); 646 } 647 648 typedef struct mdb_dmu_buf_impl { 649 struct { 650 uint64_t db_object; 651 uintptr_t db_data; 652 } db; 653 uintptr_t db_objset; 654 uint64_t db_level; 655 uint64_t db_blkid; 656 struct { 657 uint64_t rc_count; 658 } db_holds; 659 } mdb_dmu_buf_impl_t; 660 661 /* ARGSUSED */ 662 static int 663 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 664 { 665 mdb_dmu_buf_impl_t db; 666 char objectname[32]; 667 char blkidname[32]; 668 char path[ZFS_MAX_DATASET_NAME_LEN]; 669 int ptr_width = (int)(sizeof (void *)) * 2; 670 671 if (DCMD_HDRSPEC(flags)) 672 mdb_printf("%*s %8s %3s %9s %5s %s\n", 673 ptr_width, "addr", "object", "lvl", "blkid", "holds", "os"); 674 675 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 676 addr, 0) == -1) 677 return (DCMD_ERR); 678 679 if (db.db.db_object == DMU_META_DNODE_OBJECT) 680 (void) strcpy(objectname, "mdn"); 681 else 682 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 683 (u_longlong_t)db.db.db_object); 684 685 if (db.db_blkid == DMU_BONUS_BLKID) 686 (void) strcpy(blkidname, "bonus"); 687 else 688 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 689 (u_longlong_t)db.db_blkid); 690 691 if (objset_name(db.db_objset, path)) { 692 return (DCMD_ERR); 693 } 694 695 mdb_printf("%*p %8s %3u %9s %5llu %s\n", ptr_width, addr, 696 objectname, (int)db.db_level, blkidname, 697 db.db_holds.rc_count, path); 698 699 return (DCMD_OK); 700 } 701 702 /* ARGSUSED */ 703 static int 704 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 705 { 706 #define HISTOSZ 32 707 uintptr_t dbp; 708 dmu_buf_impl_t db; 709 dbuf_hash_table_t ht; 710 uint64_t bucket, ndbufs; 711 uint64_t histo[HISTOSZ]; 712 uint64_t histo2[HISTOSZ]; 713 int i, maxidx; 714 715 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 716 mdb_warn("failed to read 'dbuf_hash_table'"); 717 return (DCMD_ERR); 718 } 719 720 for (i = 0; i < HISTOSZ; i++) { 721 histo[i] = 0; 722 histo2[i] = 0; 723 } 724 725 ndbufs = 0; 726 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 727 int len; 728 729 if (mdb_vread(&dbp, sizeof (void *), 730 (uintptr_t)(ht.hash_table+bucket)) == -1) { 731 mdb_warn("failed to read hash bucket %u at %p", 732 bucket, ht.hash_table+bucket); 733 return (DCMD_ERR); 734 } 735 736 len = 0; 737 while (dbp != 0) { 738 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 739 dbp) == -1) { 740 mdb_warn("failed to read dbuf at %p", dbp); 741 return (DCMD_ERR); 742 } 743 dbp = (uintptr_t)db.db_hash_next; 744 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 745 histo2[i]++; 746 len++; 747 ndbufs++; 748 } 749 750 if (len >= HISTOSZ) 751 len = HISTOSZ-1; 752 histo[len]++; 753 } 754 755 mdb_printf("hash table has %llu buckets, %llu dbufs " 756 "(avg %llu buckets/dbuf)\n", 757 ht.hash_table_mask+1, ndbufs, 758 (ht.hash_table_mask+1)/ndbufs); 759 760 mdb_printf("\n"); 761 maxidx = 0; 762 for (i = 0; i < HISTOSZ; i++) 763 if (histo[i] > 0) 764 maxidx = i; 765 mdb_printf("hash chain length number of buckets\n"); 766 for (i = 0; i <= maxidx; i++) 767 mdb_printf("%u %llu\n", i, histo[i]); 768 769 mdb_printf("\n"); 770 maxidx = 0; 771 for (i = 0; i < HISTOSZ; i++) 772 if (histo2[i] > 0) 773 maxidx = i; 774 mdb_printf("hash chain depth number of dbufs\n"); 775 for (i = 0; i <= maxidx; i++) 776 mdb_printf("%u or more %llu %llu%%\n", 777 i, histo2[i], histo2[i]*100/ndbufs); 778 779 780 return (DCMD_OK); 781 } 782 783 #define CHAIN_END 0xffff 784 /* 785 * ::zap_leaf [-v] 786 * 787 * Print a zap_leaf_phys_t, assumed to be 16k 788 */ 789 /* ARGSUSED */ 790 static int 791 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 792 { 793 char buf[16*1024]; 794 int verbose = B_FALSE; 795 int four = B_FALSE; 796 dmu_buf_t l_dbuf; 797 zap_leaf_t l; 798 zap_leaf_phys_t *zlp = (void *)buf; 799 int i; 800 801 if (mdb_getopts(argc, argv, 802 'v', MDB_OPT_SETBITS, TRUE, &verbose, 803 '4', MDB_OPT_SETBITS, TRUE, &four, 804 NULL) != argc) 805 return (DCMD_USAGE); 806 807 l_dbuf.db_data = zlp; 808 l.l_dbuf = &l_dbuf; 809 l.l_bs = 14; /* assume 16k blocks */ 810 if (four) 811 l.l_bs = 12; 812 813 if (!(flags & DCMD_ADDRSPEC)) { 814 return (DCMD_USAGE); 815 } 816 817 if (mdb_vread(buf, sizeof (buf), addr) == -1) { 818 mdb_warn("failed to read zap_leaf_phys_t at %p", addr); 819 return (DCMD_ERR); 820 } 821 822 if (zlp->l_hdr.lh_block_type != ZBT_LEAF || 823 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { 824 mdb_warn("This does not appear to be a zap_leaf_phys_t"); 825 return (DCMD_ERR); 826 } 827 828 mdb_printf("zap_leaf_phys_t at %p:\n", addr); 829 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); 830 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); 831 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); 832 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, 833 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); 834 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); 835 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, 836 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? 837 "ENTRIES_CDSORTED" : ""); 838 839 if (verbose) { 840 mdb_printf(" hash table:\n"); 841 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { 842 if (zlp->l_hash[i] != CHAIN_END) 843 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); 844 } 845 } 846 847 mdb_printf(" chunks:\n"); 848 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { 849 /* LINTED: alignment */ 850 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); 851 switch (zlc->l_entry.le_type) { 852 case ZAP_CHUNK_FREE: 853 if (verbose) { 854 mdb_printf(" %u: free; lf_next = %u\n", 855 i, zlc->l_free.lf_next); 856 } 857 break; 858 case ZAP_CHUNK_ENTRY: 859 mdb_printf(" %u: entry\n", i); 860 if (verbose) { 861 mdb_printf(" le_next = %u\n", 862 zlc->l_entry.le_next); 863 } 864 mdb_printf(" le_name_chunk = %u\n", 865 zlc->l_entry.le_name_chunk); 866 mdb_printf(" le_name_numints = %u\n", 867 zlc->l_entry.le_name_numints); 868 mdb_printf(" le_value_chunk = %u\n", 869 zlc->l_entry.le_value_chunk); 870 mdb_printf(" le_value_intlen = %u\n", 871 zlc->l_entry.le_value_intlen); 872 mdb_printf(" le_value_numints = %u\n", 873 zlc->l_entry.le_value_numints); 874 mdb_printf(" le_cd = %u\n", 875 zlc->l_entry.le_cd); 876 mdb_printf(" le_hash = %llx\n", 877 zlc->l_entry.le_hash); 878 break; 879 case ZAP_CHUNK_ARRAY: 880 mdb_printf(" %u: array", i); 881 if (strisprint((char *)zlc->l_array.la_array)) 882 mdb_printf(" \"%s\"", zlc->l_array.la_array); 883 mdb_printf("\n"); 884 if (verbose) { 885 int j; 886 mdb_printf(" "); 887 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { 888 mdb_printf("%02x ", 889 zlc->l_array.la_array[j]); 890 } 891 mdb_printf("\n"); 892 } 893 if (zlc->l_array.la_next != CHAIN_END) { 894 mdb_printf(" lf_next = %u\n", 895 zlc->l_array.la_next); 896 } 897 break; 898 default: 899 mdb_printf(" %u: undefined type %u\n", 900 zlc->l_entry.le_type); 901 } 902 } 903 904 return (DCMD_OK); 905 } 906 907 typedef struct dbufs_data { 908 mdb_ctf_id_t id; 909 uint64_t objset; 910 uint64_t object; 911 uint64_t level; 912 uint64_t blkid; 913 char *osname; 914 } dbufs_data_t; 915 916 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 917 918 /* ARGSUSED */ 919 static int 920 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 921 { 922 dbufs_data_t *data = arg; 923 uintptr_t objset; 924 dmu_buf_t db; 925 uint8_t level; 926 uint64_t blkid; 927 char osname[ZFS_MAX_DATASET_NAME_LEN]; 928 929 if (GETMEMBID(addr, &data->id, db_objset, objset) || 930 GETMEMBID(addr, &data->id, db, db) || 931 GETMEMBID(addr, &data->id, db_level, level) || 932 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 933 return (WALK_ERR); 934 } 935 936 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 937 (data->osname == NULL || (objset_name(objset, osname) == 0 && 938 strcmp(data->osname, osname) == 0)) && 939 (data->object == DBUFS_UNSET || data->object == db.db_object) && 940 (data->level == DBUFS_UNSET || data->level == level) && 941 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 942 mdb_printf("%#lr\n", addr); 943 } 944 return (WALK_NEXT); 945 } 946 947 /* ARGSUSED */ 948 static int 949 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 950 { 951 dbufs_data_t data; 952 char *object = NULL; 953 char *blkid = NULL; 954 955 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 956 data.osname = NULL; 957 958 if (mdb_getopts(argc, argv, 959 'O', MDB_OPT_UINT64, &data.objset, 960 'n', MDB_OPT_STR, &data.osname, 961 'o', MDB_OPT_STR, &object, 962 'l', MDB_OPT_UINT64, &data.level, 963 'b', MDB_OPT_STR, &blkid) != argc) { 964 return (DCMD_USAGE); 965 } 966 967 if (object) { 968 if (strcmp(object, "mdn") == 0) { 969 data.object = DMU_META_DNODE_OBJECT; 970 } else { 971 data.object = mdb_strtoull(object); 972 } 973 } 974 975 if (blkid) { 976 if (strcmp(blkid, "bonus") == 0) { 977 data.blkid = DMU_BONUS_BLKID; 978 } else { 979 data.blkid = mdb_strtoull(blkid); 980 } 981 } 982 983 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) { 984 mdb_warn("couldn't find struct dmu_buf_impl_t"); 985 return (DCMD_ERR); 986 } 987 988 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 989 mdb_warn("can't walk dbufs"); 990 return (DCMD_ERR); 991 } 992 993 return (DCMD_OK); 994 } 995 996 typedef struct abuf_find_data { 997 dva_t dva; 998 mdb_ctf_id_t id; 999 } abuf_find_data_t; 1000 1001 /* ARGSUSED */ 1002 static int 1003 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 1004 { 1005 abuf_find_data_t *data = arg; 1006 dva_t dva; 1007 1008 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 1009 return (WALK_ERR); 1010 } 1011 1012 if (dva.dva_word[0] == data->dva.dva_word[0] && 1013 dva.dva_word[1] == data->dva.dva_word[1]) { 1014 mdb_printf("%#lr\n", addr); 1015 } 1016 return (WALK_NEXT); 1017 } 1018 1019 /* ARGSUSED */ 1020 static int 1021 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1022 { 1023 abuf_find_data_t data; 1024 GElf_Sym sym; 1025 int i; 1026 const char *syms[] = { 1027 "ARC_mru", 1028 "ARC_mru_ghost", 1029 "ARC_mfu", 1030 "ARC_mfu_ghost", 1031 }; 1032 1033 if (argc != 2) 1034 return (DCMD_USAGE); 1035 1036 for (i = 0; i < 2; i ++) { 1037 switch (argv[i].a_type) { 1038 case MDB_TYPE_STRING: 1039 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 1040 break; 1041 case MDB_TYPE_IMMEDIATE: 1042 data.dva.dva_word[i] = argv[i].a_un.a_val; 1043 break; 1044 default: 1045 return (DCMD_USAGE); 1046 } 1047 } 1048 1049 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) { 1050 mdb_warn("couldn't find struct arc_buf_hdr"); 1051 return (DCMD_ERR); 1052 } 1053 1054 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 1055 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) { 1056 mdb_warn("can't find symbol %s", syms[i]); 1057 return (DCMD_ERR); 1058 } 1059 1060 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 1061 mdb_warn("can't walk %s", syms[i]); 1062 return (DCMD_ERR); 1063 } 1064 } 1065 1066 return (DCMD_OK); 1067 } 1068 1069 1070 typedef struct dbgmsg_arg { 1071 boolean_t da_verbose; 1072 boolean_t da_address; 1073 } dbgmsg_arg_t; 1074 1075 /* ARGSUSED */ 1076 static int 1077 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 1078 { 1079 static mdb_ctf_id_t id; 1080 static boolean_t gotid; 1081 static ulong_t off; 1082 1083 dbgmsg_arg_t *da = arg; 1084 time_t timestamp; 1085 char buf[1024]; 1086 1087 if (!gotid) { 1088 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == 1089 -1) { 1090 mdb_warn("couldn't find struct zfs_dbgmsg"); 1091 return (WALK_ERR); 1092 } 1093 gotid = TRUE; 1094 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 1095 mdb_warn("couldn't find zdm_msg"); 1096 return (WALK_ERR); 1097 } 1098 off /= 8; 1099 } 1100 1101 1102 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 1103 return (WALK_ERR); 1104 } 1105 1106 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 1107 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 1108 return (DCMD_ERR); 1109 } 1110 1111 if (da->da_address) 1112 mdb_printf("%p ", addr); 1113 if (da->da_verbose) 1114 mdb_printf("%Y ", timestamp); 1115 1116 mdb_printf("%s\n", buf); 1117 1118 if (da->da_verbose) 1119 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 1120 1121 return (WALK_NEXT); 1122 } 1123 1124 /* ARGSUSED */ 1125 static int 1126 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1127 { 1128 GElf_Sym sym; 1129 dbgmsg_arg_t da = { 0 }; 1130 1131 if (mdb_getopts(argc, argv, 1132 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 1133 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, 1134 NULL) != argc) 1135 return (DCMD_USAGE); 1136 1137 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { 1138 mdb_warn("can't find zfs_dbgmsgs"); 1139 return (DCMD_ERR); 1140 } 1141 1142 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { 1143 mdb_warn("can't walk zfs_dbgmsgs"); 1144 return (DCMD_ERR); 1145 } 1146 1147 return (DCMD_OK); 1148 } 1149 1150 /*ARGSUSED*/ 1151 static int 1152 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1153 { 1154 kstat_named_t *stats; 1155 GElf_Sym sym; 1156 int nstats, i; 1157 uint_t opt_a = FALSE; 1158 uint_t opt_b = FALSE; 1159 uint_t shift = 0; 1160 const char *suffix; 1161 1162 static const char *bytestats[] = { 1163 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 1164 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 1165 "arc_meta_min", "hdr_size", "data_size", "metadata_size", 1166 "other_size", "anon_size", "anon_evictable_data", 1167 "anon_evictable_metadata", "mru_size", "mru_evictable_data", 1168 "mru_evictable_metadata", "mru_ghost_size", 1169 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata", 1170 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata", 1171 "mfu_ghost_size", "mfu_ghost_evictable_data", 1172 "mfu_ghost_evictable_metadata", "evict_l2_cached", 1173 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes", 1174 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size", 1175 "compressed_size", "uncompressed_size", "overhead_size", 1176 NULL 1177 }; 1178 1179 static const char *extras[] = { 1180 "arc_no_grow", "arc_tempreserve", 1181 NULL 1182 }; 1183 1184 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) { 1185 mdb_warn("failed to find 'arc_stats'"); 1186 return (DCMD_ERR); 1187 } 1188 1189 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 1190 1191 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 1192 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 1193 return (DCMD_ERR); 1194 } 1195 1196 nstats = sym.st_size / sizeof (kstat_named_t); 1197 1198 /* NB: -a / opt_a are ignored for backwards compatability */ 1199 if (mdb_getopts(argc, argv, 1200 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 1201 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 1202 'k', MDB_OPT_SETBITS, 10, &shift, 1203 'm', MDB_OPT_SETBITS, 20, &shift, 1204 'g', MDB_OPT_SETBITS, 30, &shift, 1205 NULL) != argc) 1206 return (DCMD_USAGE); 1207 1208 if (!opt_b && !shift) 1209 shift = 20; 1210 1211 switch (shift) { 1212 case 0: 1213 suffix = "B"; 1214 break; 1215 case 10: 1216 suffix = "KB"; 1217 break; 1218 case 20: 1219 suffix = "MB"; 1220 break; 1221 case 30: 1222 suffix = "GB"; 1223 break; 1224 default: 1225 suffix = "XX"; 1226 } 1227 1228 for (i = 0; i < nstats; i++) { 1229 int j; 1230 boolean_t bytes = B_FALSE; 1231 1232 for (j = 0; bytestats[j]; j++) { 1233 if (strcmp(stats[i].name, bytestats[j]) == 0) { 1234 bytes = B_TRUE; 1235 break; 1236 } 1237 } 1238 1239 if (bytes) { 1240 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 1241 stats[i].value.ui64 >> shift, suffix); 1242 } else { 1243 mdb_printf("%-25s = %9llu\n", stats[i].name, 1244 stats[i].value.ui64); 1245 } 1246 } 1247 1248 for (i = 0; extras[i]; i++) { 1249 uint64_t buf; 1250 1251 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) { 1252 mdb_warn("failed to find '%s'", extras[i]); 1253 return (DCMD_ERR); 1254 } 1255 1256 if (sym.st_size != sizeof (uint64_t) && 1257 sym.st_size != sizeof (uint32_t)) { 1258 mdb_warn("expected scalar for variable '%s'\n", 1259 extras[i]); 1260 return (DCMD_ERR); 1261 } 1262 1263 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 1264 mdb_warn("couldn't read '%s'", extras[i]); 1265 return (DCMD_ERR); 1266 } 1267 1268 mdb_printf("%-25s = ", extras[i]); 1269 1270 /* NB: all the 64-bit extras happen to be byte counts */ 1271 if (sym.st_size == sizeof (uint64_t)) 1272 mdb_printf("%9llu %s\n", buf >> shift, suffix); 1273 1274 if (sym.st_size == sizeof (uint32_t)) 1275 mdb_printf("%9d\n", *((uint32_t *)&buf)); 1276 } 1277 return (DCMD_OK); 1278 } 1279 1280 typedef struct mdb_spa_print { 1281 pool_state_t spa_state; 1282 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; 1283 uintptr_t spa_normal_class; 1284 } mdb_spa_print_t; 1285 1286 1287 const char histo_stars[] = "****************************************"; 1288 const int histo_width = sizeof (histo_stars) - 1; 1289 1290 static void 1291 dump_histogram(const uint64_t *histo, int size, int offset) 1292 { 1293 int i; 1294 int minidx = size - 1; 1295 int maxidx = 0; 1296 uint64_t max = 0; 1297 1298 for (i = 0; i < size; i++) { 1299 if (histo[i] > max) 1300 max = histo[i]; 1301 if (histo[i] > 0 && i > maxidx) 1302 maxidx = i; 1303 if (histo[i] > 0 && i < minidx) 1304 minidx = i; 1305 } 1306 1307 if (max < histo_width) 1308 max = histo_width; 1309 1310 for (i = minidx; i <= maxidx; i++) { 1311 mdb_printf("%3u: %6llu %s\n", 1312 i + offset, (u_longlong_t)histo[i], 1313 &histo_stars[(max - histo[i]) * histo_width / max]); 1314 } 1315 } 1316 1317 typedef struct mdb_metaslab_class { 1318 uint64_t mc_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 1319 } mdb_metaslab_class_t; 1320 1321 /* 1322 * spa_class_histogram(uintptr_t class_addr) 1323 * 1324 * Prints free space histogram for a device class 1325 * 1326 * Returns DCMD_OK, or DCMD_ERR. 1327 */ 1328 static int 1329 spa_class_histogram(uintptr_t class_addr) 1330 { 1331 mdb_metaslab_class_t mc; 1332 if (mdb_ctf_vread(&mc, "metaslab_class_t", 1333 "mdb_metaslab_class_t", class_addr, 0) == -1) 1334 return (DCMD_ERR); 1335 1336 mdb_inc_indent(4); 1337 dump_histogram(mc.mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); 1338 mdb_dec_indent(4); 1339 return (DCMD_OK); 1340 } 1341 1342 /* 1343 * ::spa 1344 * 1345 * -c Print configuration information as well 1346 * -v Print vdev state 1347 * -e Print vdev error stats 1348 * -m Print vdev metaslab info 1349 * -M print vdev metaslab group info 1350 * -h Print histogram info (must be combined with -m or -M) 1351 * 1352 * Print a summarized spa_t. When given no arguments, prints out a table of all 1353 * active pools on the system. 1354 */ 1355 /* ARGSUSED */ 1356 static int 1357 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1358 { 1359 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1360 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1361 const char *state; 1362 int spa_flags = 0; 1363 1364 if (mdb_getopts(argc, argv, 1365 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags, 1366 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags, 1367 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1368 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1369 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1370 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1371 NULL) != argc) 1372 return (DCMD_USAGE); 1373 1374 if (!(flags & DCMD_ADDRSPEC)) { 1375 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1376 mdb_warn("can't walk spa"); 1377 return (DCMD_ERR); 1378 } 1379 1380 return (DCMD_OK); 1381 } 1382 1383 if (flags & DCMD_PIPE_OUT) { 1384 mdb_printf("%#lr\n", addr); 1385 return (DCMD_OK); 1386 } 1387 1388 if (DCMD_HDRSPEC(flags)) 1389 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1390 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1391 1392 mdb_spa_print_t spa; 1393 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1) 1394 return (DCMD_ERR); 1395 1396 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1397 state = "UNKNOWN"; 1398 else 1399 state = statetab[spa.spa_state]; 1400 1401 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1402 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1403 spa_class_histogram(spa.spa_normal_class); 1404 1405 if (spa_flags & SPA_FLAG_CONFIG) { 1406 mdb_printf("\n"); 1407 mdb_inc_indent(4); 1408 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1409 NULL) != DCMD_OK) 1410 return (DCMD_ERR); 1411 mdb_dec_indent(4); 1412 } 1413 1414 if (spa_flags & SPA_FLAG_ALL_VDEV) { 1415 mdb_arg_t v; 1416 char opts[100] = "-"; 1417 int args = 1418 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1; 1419 1420 if (spa_flags & SPA_FLAG_ERRORS) 1421 strcat(opts, "e"); 1422 if (spa_flags & SPA_FLAG_METASLABS) 1423 strcat(opts, "m"); 1424 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 1425 strcat(opts, "M"); 1426 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1427 strcat(opts, "h"); 1428 1429 v.a_type = MDB_TYPE_STRING; 1430 v.a_un.a_str = opts; 1431 1432 mdb_printf("\n"); 1433 mdb_inc_indent(4); 1434 if (mdb_call_dcmd("spa_vdevs", addr, flags, args, 1435 &v) != DCMD_OK) 1436 return (DCMD_ERR); 1437 mdb_dec_indent(4); 1438 } 1439 1440 return (DCMD_OK); 1441 } 1442 1443 typedef struct mdb_spa_config_spa { 1444 uintptr_t spa_config; 1445 } mdb_spa_config_spa_t; 1446 1447 /* 1448 * ::spa_config 1449 * 1450 * Given a spa_t, print the configuration information stored in spa_config. 1451 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1452 * We simply read the value of spa_config and pass off to ::nvlist. 1453 */ 1454 /* ARGSUSED */ 1455 static int 1456 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1457 { 1458 mdb_spa_config_spa_t spa; 1459 1460 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1461 return (DCMD_USAGE); 1462 1463 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", 1464 addr, 0) == -1) 1465 return (DCMD_ERR); 1466 1467 if (spa.spa_config == 0) { 1468 mdb_printf("(none)\n"); 1469 return (DCMD_OK); 1470 } 1471 1472 return (mdb_call_dcmd("nvlist", spa.spa_config, flags, 1473 0, NULL)); 1474 } 1475 1476 1477 1478 typedef struct mdb_range_tree { 1479 uint64_t rt_space; 1480 } mdb_range_tree_t; 1481 1482 typedef struct mdb_metaslab_group { 1483 uint64_t mg_fragmentation; 1484 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 1485 uintptr_t mg_vd; 1486 } mdb_metaslab_group_t; 1487 1488 typedef struct mdb_metaslab { 1489 uint64_t ms_id; 1490 uint64_t ms_start; 1491 uint64_t ms_size; 1492 int64_t ms_deferspace; 1493 uint64_t ms_fragmentation; 1494 uint64_t ms_weight; 1495 uintptr_t ms_allocating[TXG_SIZE]; 1496 uintptr_t ms_checkpointing; 1497 uintptr_t ms_freeing; 1498 uintptr_t ms_freed; 1499 uintptr_t ms_allocatable; 1500 uintptr_t ms_sm; 1501 } mdb_metaslab_t; 1502 1503 typedef struct mdb_space_map_phys_t { 1504 int64_t smp_alloc; 1505 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE]; 1506 } mdb_space_map_phys_t; 1507 1508 typedef struct mdb_space_map { 1509 uint64_t sm_size; 1510 uint8_t sm_shift; 1511 int64_t sm_alloc; 1512 uintptr_t sm_phys; 1513 } mdb_space_map_t; 1514 1515 typedef struct mdb_vdev { 1516 uintptr_t vdev_path; 1517 uintptr_t vdev_ms; 1518 uintptr_t vdev_ops; 1519 uint64_t vdev_ms_count; 1520 uint64_t vdev_id; 1521 vdev_stat_t vdev_stat; 1522 } mdb_vdev_t; 1523 1524 typedef struct mdb_vdev_ops { 1525 char vdev_op_type[16]; 1526 } mdb_vdev_ops_t; 1527 1528 static int 1529 metaslab_stats(uintptr_t addr, int spa_flags) 1530 { 1531 mdb_vdev_t vdev; 1532 uintptr_t *vdev_ms; 1533 1534 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t", 1535 (uintptr_t)addr, 0) == -1) { 1536 mdb_warn("failed to read vdev at %p\n", addr); 1537 return (DCMD_ERR); 1538 } 1539 1540 mdb_inc_indent(4); 1541 mdb_printf("%<u>%-?s %6s %20s %10s %9s%</u>\n", "ADDR", "ID", 1542 "OFFSET", "FREE", "FRAGMENTATION"); 1543 1544 vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *), 1545 UM_SLEEP | UM_GC); 1546 if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *), 1547 (uintptr_t)vdev.vdev_ms) == -1) { 1548 mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms); 1549 return (DCMD_ERR); 1550 } 1551 1552 for (int m = 0; m < vdev.vdev_ms_count; m++) { 1553 mdb_metaslab_t ms; 1554 mdb_space_map_t sm = { 0 }; 1555 char free[NICENUM_BUFLEN]; 1556 1557 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1558 (uintptr_t)vdev_ms[m], 0) == -1) 1559 return (DCMD_ERR); 1560 1561 if (ms.ms_sm != 0 && 1562 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t", 1563 ms.ms_sm, 0) == -1) 1564 return (DCMD_ERR); 1565 1566 mdb_nicenum(ms.ms_size - sm.sm_alloc, free); 1567 1568 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id, 1569 ms.ms_start, free); 1570 if (ms.ms_fragmentation == ZFS_FRAG_INVALID) 1571 mdb_printf("%9s\n", "-"); 1572 else 1573 mdb_printf("%9llu%%\n", ms.ms_fragmentation); 1574 1575 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != 0) { 1576 mdb_space_map_phys_t smp; 1577 1578 if (sm.sm_phys == 0) 1579 continue; 1580 1581 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 1582 "mdb_space_map_phys_t", sm.sm_phys, 0); 1583 1584 dump_histogram(smp.smp_histogram, 1585 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift); 1586 } 1587 } 1588 mdb_dec_indent(4); 1589 return (DCMD_OK); 1590 } 1591 1592 static int 1593 metaslab_group_stats(uintptr_t addr, int spa_flags) 1594 { 1595 mdb_metaslab_group_t mg; 1596 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", 1597 (uintptr_t)addr, 0) == -1) { 1598 mdb_warn("failed to read vdev_mg at %p\n", addr); 1599 return (DCMD_ERR); 1600 } 1601 1602 mdb_inc_indent(4); 1603 mdb_printf("%<u>%-?s %15s%</u>\n", "ADDR", "FRAGMENTATION"); 1604 if (mg.mg_fragmentation == ZFS_FRAG_INVALID) 1605 mdb_printf("%0?p %15s\n", addr, "-"); 1606 else 1607 mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation); 1608 1609 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1610 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); 1611 mdb_dec_indent(4); 1612 return (DCMD_OK); 1613 } 1614 1615 /* 1616 * ::vdev 1617 * 1618 * Print out a summarized vdev_t, in the following form: 1619 * 1620 * ADDR STATE AUX DESC 1621 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1622 * 1623 * If '-r' is specified, recursively visit all children. 1624 * 1625 * With '-e', the statistics associated with the vdev are printed as well. 1626 */ 1627 static int 1628 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive, 1629 int spa_flags) 1630 { 1631 vdev_t vdev; 1632 char desc[MAXNAMELEN]; 1633 int c, children; 1634 uintptr_t *child; 1635 const char *state, *aux; 1636 1637 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1638 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1639 return (DCMD_ERR); 1640 } 1641 1642 if (flags & DCMD_PIPE_OUT) { 1643 mdb_printf("%#lr\n", addr); 1644 } else { 1645 if (vdev.vdev_path != NULL) { 1646 if (mdb_readstr(desc, sizeof (desc), 1647 (uintptr_t)vdev.vdev_path) == -1) { 1648 mdb_warn("failed to read vdev_path at %p\n", 1649 vdev.vdev_path); 1650 return (DCMD_ERR); 1651 } 1652 } else if (vdev.vdev_ops != NULL) { 1653 vdev_ops_t ops; 1654 if (mdb_vread(&ops, sizeof (ops), 1655 (uintptr_t)vdev.vdev_ops) == -1) { 1656 mdb_warn("failed to read vdev_ops at %p\n", 1657 vdev.vdev_ops); 1658 return (DCMD_ERR); 1659 } 1660 (void) strcpy(desc, ops.vdev_op_type); 1661 } else { 1662 (void) strcpy(desc, "<unknown>"); 1663 } 1664 1665 if (depth == 0 && DCMD_HDRSPEC(flags)) 1666 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1667 "ADDR", "STATE", "AUX", 1668 sizeof (uintptr_t) == 4 ? 43 : 35, 1669 "DESCRIPTION"); 1670 1671 mdb_printf("%0?p ", addr); 1672 1673 switch (vdev.vdev_state) { 1674 case VDEV_STATE_CLOSED: 1675 state = "CLOSED"; 1676 break; 1677 case VDEV_STATE_OFFLINE: 1678 state = "OFFLINE"; 1679 break; 1680 case VDEV_STATE_CANT_OPEN: 1681 state = "CANT_OPEN"; 1682 break; 1683 case VDEV_STATE_DEGRADED: 1684 state = "DEGRADED"; 1685 break; 1686 case VDEV_STATE_HEALTHY: 1687 state = "HEALTHY"; 1688 break; 1689 case VDEV_STATE_REMOVED: 1690 state = "REMOVED"; 1691 break; 1692 case VDEV_STATE_FAULTED: 1693 state = "FAULTED"; 1694 break; 1695 default: 1696 state = "UNKNOWN"; 1697 break; 1698 } 1699 1700 switch (vdev.vdev_stat.vs_aux) { 1701 case VDEV_AUX_NONE: 1702 aux = "-"; 1703 break; 1704 case VDEV_AUX_OPEN_FAILED: 1705 aux = "OPEN_FAILED"; 1706 break; 1707 case VDEV_AUX_CORRUPT_DATA: 1708 aux = "CORRUPT_DATA"; 1709 break; 1710 case VDEV_AUX_NO_REPLICAS: 1711 aux = "NO_REPLICAS"; 1712 break; 1713 case VDEV_AUX_BAD_GUID_SUM: 1714 aux = "BAD_GUID_SUM"; 1715 break; 1716 case VDEV_AUX_TOO_SMALL: 1717 aux = "TOO_SMALL"; 1718 break; 1719 case VDEV_AUX_BAD_LABEL: 1720 aux = "BAD_LABEL"; 1721 break; 1722 case VDEV_AUX_VERSION_NEWER: 1723 aux = "VERS_NEWER"; 1724 break; 1725 case VDEV_AUX_VERSION_OLDER: 1726 aux = "VERS_OLDER"; 1727 break; 1728 case VDEV_AUX_UNSUP_FEAT: 1729 aux = "UNSUP_FEAT"; 1730 break; 1731 case VDEV_AUX_SPARED: 1732 aux = "SPARED"; 1733 break; 1734 case VDEV_AUX_ERR_EXCEEDED: 1735 aux = "ERR_EXCEEDED"; 1736 break; 1737 case VDEV_AUX_IO_FAILURE: 1738 aux = "IO_FAILURE"; 1739 break; 1740 case VDEV_AUX_BAD_LOG: 1741 aux = "BAD_LOG"; 1742 break; 1743 case VDEV_AUX_EXTERNAL: 1744 aux = "EXTERNAL"; 1745 break; 1746 case VDEV_AUX_SPLIT_POOL: 1747 aux = "SPLIT_POOL"; 1748 break; 1749 case VDEV_AUX_CHILDREN_OFFLINE: 1750 aux = "CHILDREN_OFFLINE"; 1751 break; 1752 default: 1753 aux = "UNKNOWN"; 1754 break; 1755 } 1756 1757 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1758 1759 if (spa_flags & SPA_FLAG_ERRORS) { 1760 vdev_stat_t *vs = &vdev.vdev_stat; 1761 int i; 1762 1763 mdb_inc_indent(4); 1764 mdb_printf("\n"); 1765 mdb_printf("%<u> %12s %12s %12s %12s " 1766 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1767 "IOCTL"); 1768 mdb_printf("OPS "); 1769 for (i = 1; i < ZIO_TYPES; i++) 1770 mdb_printf("%11#llx%s", vs->vs_ops[i], 1771 i == ZIO_TYPES - 1 ? "" : " "); 1772 mdb_printf("\n"); 1773 mdb_printf("BYTES "); 1774 for (i = 1; i < ZIO_TYPES; i++) 1775 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1776 i == ZIO_TYPES - 1 ? "" : " "); 1777 1778 1779 mdb_printf("\n"); 1780 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1781 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1782 mdb_printf("ECKSUM %10#llx\n", 1783 vs->vs_checksum_errors); 1784 mdb_dec_indent(4); 1785 mdb_printf("\n"); 1786 } 1787 1788 if (spa_flags & SPA_FLAG_METASLAB_GROUPS && 1789 vdev.vdev_mg != NULL) { 1790 metaslab_group_stats((uintptr_t)vdev.vdev_mg, 1791 spa_flags); 1792 } 1793 if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) { 1794 metaslab_stats((uintptr_t)addr, spa_flags); 1795 } 1796 } 1797 1798 children = vdev.vdev_children; 1799 1800 if (children == 0 || !recursive) 1801 return (DCMD_OK); 1802 1803 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1804 if (mdb_vread(child, children * sizeof (void *), 1805 (uintptr_t)vdev.vdev_child) == -1) { 1806 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1807 return (DCMD_ERR); 1808 } 1809 1810 for (c = 0; c < children; c++) { 1811 if (do_print_vdev(child[c], flags, depth + 2, recursive, 1812 spa_flags)) { 1813 return (DCMD_ERR); 1814 } 1815 } 1816 1817 return (DCMD_OK); 1818 } 1819 1820 static int 1821 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1822 { 1823 uint64_t depth = 0; 1824 boolean_t recursive = B_FALSE; 1825 int spa_flags = 0; 1826 1827 if (mdb_getopts(argc, argv, 1828 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1829 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1830 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1831 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1832 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1833 'd', MDB_OPT_UINT64, &depth, NULL) != argc) 1834 return (DCMD_USAGE); 1835 1836 if (!(flags & DCMD_ADDRSPEC)) { 1837 mdb_warn("no vdev_t address given\n"); 1838 return (DCMD_ERR); 1839 } 1840 1841 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags)); 1842 } 1843 1844 typedef struct mdb_metaslab_alloc_trace { 1845 uintptr_t mat_mg; 1846 uintptr_t mat_msp; 1847 uint64_t mat_size; 1848 uint64_t mat_weight; 1849 uint64_t mat_offset; 1850 uint32_t mat_dva_id; 1851 int mat_allocator; 1852 } mdb_metaslab_alloc_trace_t; 1853 1854 static void 1855 metaslab_print_weight(uint64_t weight) 1856 { 1857 char buf[100]; 1858 1859 if (WEIGHT_IS_SPACEBASED(weight)) { 1860 mdb_nicenum( 1861 weight & ~(METASLAB_ACTIVE_MASK | METASLAB_WEIGHT_TYPE), 1862 buf); 1863 } else { 1864 char size[NICENUM_BUFLEN]; 1865 mdb_nicenum(1ULL << WEIGHT_GET_INDEX(weight), size); 1866 (void) mdb_snprintf(buf, sizeof (buf), "%llu x %s", 1867 WEIGHT_GET_COUNT(weight), size); 1868 } 1869 mdb_printf("%11s ", buf); 1870 } 1871 1872 /* ARGSUSED */ 1873 static int 1874 metaslab_weight(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1875 { 1876 uint64_t weight = 0; 1877 char active; 1878 1879 if (argc == 0 && (flags & DCMD_ADDRSPEC)) { 1880 if (mdb_vread(&weight, sizeof (uint64_t), addr) == -1) { 1881 mdb_warn("failed to read weight at %p\n", addr); 1882 return (DCMD_ERR); 1883 } 1884 } else if (argc == 1 && !(flags & DCMD_ADDRSPEC)) { 1885 weight = (argv[0].a_type == MDB_TYPE_IMMEDIATE) ? 1886 argv[0].a_un.a_val : mdb_strtoull(argv[0].a_un.a_str); 1887 } else { 1888 return (DCMD_USAGE); 1889 } 1890 1891 if (DCMD_HDRSPEC(flags)) { 1892 mdb_printf("%<u>%-6s %9s %9s%</u>\n", 1893 "ACTIVE", "ALGORITHM", "WEIGHT"); 1894 } 1895 1896 if (weight & METASLAB_WEIGHT_PRIMARY) 1897 active = 'P'; 1898 else if (weight & METASLAB_WEIGHT_SECONDARY) 1899 active = 'S'; 1900 else 1901 active = '-'; 1902 mdb_printf("%6c %8s ", active, 1903 WEIGHT_IS_SPACEBASED(weight) ? "SPACE" : "SEGMENT"); 1904 metaslab_print_weight(weight); 1905 mdb_printf("\n"); 1906 1907 return (DCMD_OK); 1908 } 1909 1910 /* ARGSUSED */ 1911 static int 1912 metaslab_trace(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1913 { 1914 mdb_metaslab_alloc_trace_t mat; 1915 mdb_metaslab_group_t mg = { 0 }; 1916 char result_type[100]; 1917 1918 if (mdb_ctf_vread(&mat, "metaslab_alloc_trace_t", 1919 "mdb_metaslab_alloc_trace_t", addr, 0) == -1) { 1920 return (DCMD_ERR); 1921 } 1922 1923 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 1924 mdb_printf("%<u>%6s %6s %8s %11s %11s %18s %18s%</u>\n", 1925 "MSID", "DVA", "ASIZE", "ALLOCATOR", "WEIGHT", "RESULT", 1926 "VDEV"); 1927 } 1928 1929 if (mat.mat_msp != 0) { 1930 mdb_metaslab_t ms; 1931 1932 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1933 mat.mat_msp, 0) == -1) { 1934 return (DCMD_ERR); 1935 } 1936 mdb_printf("%6llu ", ms.ms_id); 1937 } else { 1938 mdb_printf("%6s ", "-"); 1939 } 1940 1941 mdb_printf("%6d %8llx %11llx ", mat.mat_dva_id, mat.mat_size, 1942 mat.mat_allocator); 1943 1944 metaslab_print_weight(mat.mat_weight); 1945 1946 if ((int64_t)mat.mat_offset < 0) { 1947 if (enum_lookup("enum trace_alloc_type", mat.mat_offset, 1948 "TRACE_", sizeof (result_type), result_type) == -1) { 1949 mdb_warn("Could not find enum for trace_alloc_type"); 1950 return (DCMD_ERR); 1951 } 1952 mdb_printf("%18s ", result_type); 1953 } else { 1954 mdb_printf("%<b>%18llx%</b> ", mat.mat_offset); 1955 } 1956 1957 if (mat.mat_mg != 0 && 1958 mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", 1959 mat.mat_mg, 0) == -1) { 1960 return (DCMD_ERR); 1961 } 1962 1963 if (mg.mg_vd != 0) { 1964 mdb_vdev_t vdev; 1965 char desc[MAXNAMELEN]; 1966 1967 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t", 1968 mg.mg_vd, 0) == -1) { 1969 return (DCMD_ERR); 1970 } 1971 1972 if (vdev.vdev_path != 0) { 1973 char path[MAXNAMELEN]; 1974 1975 if (mdb_readstr(path, sizeof (path), 1976 vdev.vdev_path) == -1) { 1977 mdb_warn("failed to read vdev_path at %p\n", 1978 vdev.vdev_path); 1979 return (DCMD_ERR); 1980 } 1981 char *slash; 1982 if ((slash = strrchr(path, '/')) != NULL) { 1983 strcpy(desc, slash + 1); 1984 } else { 1985 strcpy(desc, path); 1986 } 1987 } else if (vdev.vdev_ops != 0) { 1988 mdb_vdev_ops_t ops; 1989 if (mdb_ctf_vread(&ops, "vdev_ops_t", "mdb_vdev_ops_t", 1990 vdev.vdev_ops, 0) == -1) { 1991 mdb_warn("failed to read vdev_ops at %p\n", 1992 vdev.vdev_ops); 1993 return (DCMD_ERR); 1994 } 1995 (void) mdb_snprintf(desc, sizeof (desc), 1996 "%s-%llu", ops.vdev_op_type, vdev.vdev_id); 1997 } else { 1998 (void) strcpy(desc, "<unknown>"); 1999 } 2000 mdb_printf("%18s\n", desc); 2001 } 2002 2003 return (DCMD_OK); 2004 } 2005 2006 typedef struct metaslab_walk_data { 2007 uint64_t mw_numvdevs; 2008 uintptr_t *mw_vdevs; 2009 int mw_curvdev; 2010 uint64_t mw_nummss; 2011 uintptr_t *mw_mss; 2012 int mw_curms; 2013 } metaslab_walk_data_t; 2014 2015 static int 2016 metaslab_walk_step(mdb_walk_state_t *wsp) 2017 { 2018 metaslab_walk_data_t *mw = wsp->walk_data; 2019 metaslab_t ms; 2020 uintptr_t msp; 2021 2022 if (mw->mw_curvdev >= mw->mw_numvdevs) 2023 return (WALK_DONE); 2024 2025 if (mw->mw_mss == NULL) { 2026 uintptr_t mssp; 2027 uintptr_t vdevp; 2028 2029 ASSERT(mw->mw_curms == 0); 2030 ASSERT(mw->mw_nummss == 0); 2031 2032 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 2033 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || 2034 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { 2035 return (WALK_ERR); 2036 } 2037 2038 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 2039 UM_SLEEP | UM_GC); 2040 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 2041 mssp) == -1) { 2042 mdb_warn("failed to read vdev_ms at %p", mssp); 2043 return (WALK_ERR); 2044 } 2045 } 2046 2047 if (mw->mw_curms >= mw->mw_nummss) { 2048 mw->mw_mss = NULL; 2049 mw->mw_curms = 0; 2050 mw->mw_nummss = 0; 2051 mw->mw_curvdev++; 2052 return (WALK_NEXT); 2053 } 2054 2055 msp = mw->mw_mss[mw->mw_curms]; 2056 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 2057 mdb_warn("failed to read metaslab_t at %p", msp); 2058 return (WALK_ERR); 2059 } 2060 2061 mw->mw_curms++; 2062 2063 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 2064 } 2065 2066 static int 2067 metaslab_walk_init(mdb_walk_state_t *wsp) 2068 { 2069 metaslab_walk_data_t *mw; 2070 uintptr_t root_vdevp; 2071 uintptr_t childp; 2072 2073 if (wsp->walk_addr == 0) { 2074 mdb_warn("must supply address of spa_t\n"); 2075 return (WALK_ERR); 2076 } 2077 2078 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 2079 2080 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || 2081 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || 2082 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { 2083 return (DCMD_ERR); 2084 } 2085 2086 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 2087 UM_SLEEP | UM_GC); 2088 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 2089 childp) == -1) { 2090 mdb_warn("failed to read root vdev children at %p", childp); 2091 return (DCMD_ERR); 2092 } 2093 2094 wsp->walk_data = mw; 2095 2096 return (WALK_NEXT); 2097 } 2098 2099 typedef struct mdb_spa { 2100 uintptr_t spa_dsl_pool; 2101 uintptr_t spa_root_vdev; 2102 } mdb_spa_t; 2103 2104 typedef struct mdb_dsl_pool { 2105 uintptr_t dp_root_dir; 2106 } mdb_dsl_pool_t; 2107 2108 typedef struct mdb_dsl_dir { 2109 uintptr_t dd_dbuf; 2110 int64_t dd_space_towrite[TXG_SIZE]; 2111 } mdb_dsl_dir_t; 2112 2113 typedef struct mdb_dsl_dir_phys { 2114 uint64_t dd_used_bytes; 2115 uint64_t dd_compressed_bytes; 2116 uint64_t dd_uncompressed_bytes; 2117 } mdb_dsl_dir_phys_t; 2118 2119 typedef struct space_data { 2120 uint64_t ms_allocating[TXG_SIZE]; 2121 uint64_t ms_checkpointing; 2122 uint64_t ms_freeing; 2123 uint64_t ms_freed; 2124 uint64_t ms_allocatable; 2125 int64_t ms_deferspace; 2126 uint64_t avail; 2127 uint64_t nowavail; 2128 } space_data_t; 2129 2130 /* ARGSUSED */ 2131 static int 2132 space_cb(uintptr_t addr, const void *unknown, void *arg) 2133 { 2134 space_data_t *sd = arg; 2135 mdb_metaslab_t ms; 2136 mdb_range_tree_t rt; 2137 mdb_space_map_t sm = { 0 }; 2138 mdb_space_map_phys_t smp = { 0 }; 2139 int i; 2140 2141 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 2142 addr, 0) == -1) 2143 return (WALK_ERR); 2144 2145 for (i = 0; i < TXG_SIZE; i++) { 2146 if (mdb_ctf_vread(&rt, "range_tree_t", 2147 "mdb_range_tree_t", ms.ms_allocating[i], 0) == -1) 2148 return (WALK_ERR); 2149 2150 sd->ms_allocating[i] += rt.rt_space; 2151 2152 } 2153 2154 if (mdb_ctf_vread(&rt, "range_tree_t", 2155 "mdb_range_tree_t", ms.ms_checkpointing, 0) == -1) 2156 return (WALK_ERR); 2157 sd->ms_checkpointing += rt.rt_space; 2158 2159 if (mdb_ctf_vread(&rt, "range_tree_t", 2160 "mdb_range_tree_t", ms.ms_freeing, 0) == -1) 2161 return (WALK_ERR); 2162 sd->ms_freeing += rt.rt_space; 2163 2164 if (mdb_ctf_vread(&rt, "range_tree_t", 2165 "mdb_range_tree_t", ms.ms_freed, 0) == -1) 2166 return (WALK_ERR); 2167 sd->ms_freed += rt.rt_space; 2168 2169 if (mdb_ctf_vread(&rt, "range_tree_t", 2170 "mdb_range_tree_t", ms.ms_allocatable, 0) == -1) 2171 return (WALK_ERR); 2172 sd->ms_allocatable += rt.rt_space; 2173 2174 if (ms.ms_sm != 0 && 2175 mdb_ctf_vread(&sm, "space_map_t", 2176 "mdb_space_map_t", ms.ms_sm, 0) == -1) 2177 return (WALK_ERR); 2178 2179 if (sm.sm_phys != 0) { 2180 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 2181 "mdb_space_map_phys_t", sm.sm_phys, 0); 2182 } 2183 2184 sd->ms_deferspace += ms.ms_deferspace; 2185 sd->avail += sm.sm_size - sm.sm_alloc; 2186 sd->nowavail += sm.sm_size - smp.smp_alloc; 2187 2188 return (WALK_NEXT); 2189 } 2190 2191 /* 2192 * ::spa_space [-b] 2193 * 2194 * Given a spa_t, print out it's on-disk space usage and in-core 2195 * estimates of future usage. If -b is given, print space in bytes. 2196 * Otherwise print in megabytes. 2197 */ 2198 /* ARGSUSED */ 2199 static int 2200 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2201 { 2202 mdb_spa_t spa; 2203 mdb_dsl_pool_t dp; 2204 mdb_dsl_dir_t dd; 2205 mdb_dmu_buf_impl_t db; 2206 mdb_dsl_dir_phys_t dsp; 2207 space_data_t sd; 2208 int shift = 20; 2209 char *suffix = "M"; 2210 int bytes = B_FALSE; 2211 2212 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != 2213 argc) 2214 return (DCMD_USAGE); 2215 if (!(flags & DCMD_ADDRSPEC)) 2216 return (DCMD_USAGE); 2217 2218 if (bytes) { 2219 shift = 0; 2220 suffix = ""; 2221 } 2222 2223 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t", 2224 addr, 0) == -1 || 2225 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t", 2226 spa.spa_dsl_pool, 0) == -1 || 2227 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t", 2228 dp.dp_root_dir, 0) == -1 || 2229 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 2230 dd.dd_dbuf, 0) == -1 || 2231 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys", 2232 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) { 2233 return (DCMD_ERR); 2234 } 2235 2236 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 2237 dd.dd_space_towrite[0] >> shift, suffix, 2238 dd.dd_space_towrite[1] >> shift, suffix, 2239 dd.dd_space_towrite[2] >> shift, suffix, 2240 dd.dd_space_towrite[3] >> shift, suffix); 2241 2242 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 2243 dsp.dd_used_bytes >> shift, suffix); 2244 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 2245 dsp.dd_compressed_bytes >> shift, suffix); 2246 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 2247 dsp.dd_uncompressed_bytes >> shift, suffix); 2248 2249 bzero(&sd, sizeof (sd)); 2250 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 2251 mdb_warn("can't walk metaslabs"); 2252 return (DCMD_ERR); 2253 } 2254 2255 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 2256 sd.ms_allocating[0] >> shift, suffix, 2257 sd.ms_allocating[1] >> shift, suffix, 2258 sd.ms_allocating[2] >> shift, suffix, 2259 sd.ms_allocating[3] >> shift, suffix); 2260 mdb_printf("ms_checkpointing = %llu%s\n", 2261 sd.ms_checkpointing >> shift, suffix); 2262 mdb_printf("ms_freeing = %llu%s\n", 2263 sd.ms_freeing >> shift, suffix); 2264 mdb_printf("ms_freed = %llu%s\n", 2265 sd.ms_freed >> shift, suffix); 2266 mdb_printf("ms_allocatable = %llu%s\n", 2267 sd.ms_allocatable >> shift, suffix); 2268 mdb_printf("ms_deferspace = %llu%s\n", 2269 sd.ms_deferspace >> shift, suffix); 2270 mdb_printf("last synced avail = %llu%s\n", 2271 sd.avail >> shift, suffix); 2272 mdb_printf("current syncing avail = %llu%s\n", 2273 sd.nowavail >> shift, suffix); 2274 2275 return (DCMD_OK); 2276 } 2277 2278 typedef struct mdb_spa_aux_vdev { 2279 int sav_count; 2280 uintptr_t sav_vdevs; 2281 } mdb_spa_aux_vdev_t; 2282 2283 typedef struct mdb_spa_vdevs { 2284 uintptr_t spa_root_vdev; 2285 mdb_spa_aux_vdev_t spa_l2cache; 2286 mdb_spa_aux_vdev_t spa_spares; 2287 } mdb_spa_vdevs_t; 2288 2289 static int 2290 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 2291 const char *name) 2292 { 2293 uintptr_t *aux; 2294 size_t len; 2295 int ret, i; 2296 2297 /* 2298 * Iterate over aux vdevs and print those out as well. This is a 2299 * little annoying because we don't have a root vdev to pass to ::vdev. 2300 * Instead, we print a single line and then call it for each child 2301 * vdev. 2302 */ 2303 if (sav->sav_count != 0) { 2304 v[1].a_type = MDB_TYPE_STRING; 2305 v[1].a_un.a_str = "-d"; 2306 v[2].a_type = MDB_TYPE_IMMEDIATE; 2307 v[2].a_un.a_val = 2; 2308 2309 len = sav->sav_count * sizeof (uintptr_t); 2310 aux = mdb_alloc(len, UM_SLEEP); 2311 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) { 2312 mdb_free(aux, len); 2313 mdb_warn("failed to read l2cache vdevs at %p", 2314 sav->sav_vdevs); 2315 return (DCMD_ERR); 2316 } 2317 2318 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 2319 2320 for (i = 0; i < sav->sav_count; i++) { 2321 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 2322 if (ret != DCMD_OK) { 2323 mdb_free(aux, len); 2324 return (ret); 2325 } 2326 } 2327 2328 mdb_free(aux, len); 2329 } 2330 2331 return (0); 2332 } 2333 2334 /* 2335 * ::spa_vdevs 2336 * 2337 * -e Include error stats 2338 * -m Include metaslab information 2339 * -M Include metaslab group information 2340 * -h Include histogram information (requires -m or -M) 2341 * 2342 * Print out a summarized list of vdevs for the given spa_t. 2343 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 2344 * iterating over the cache devices. 2345 */ 2346 /* ARGSUSED */ 2347 static int 2348 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2349 { 2350 mdb_arg_t v[3]; 2351 int ret; 2352 char opts[100] = "-r"; 2353 int spa_flags = 0; 2354 2355 if (mdb_getopts(argc, argv, 2356 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 2357 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 2358 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 2359 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 2360 NULL) != argc) 2361 return (DCMD_USAGE); 2362 2363 if (!(flags & DCMD_ADDRSPEC)) 2364 return (DCMD_USAGE); 2365 2366 mdb_spa_vdevs_t spa; 2367 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1) 2368 return (DCMD_ERR); 2369 2370 /* 2371 * Unitialized spa_t structures can have a NULL root vdev. 2372 */ 2373 if (spa.spa_root_vdev == 0) { 2374 mdb_printf("no associated vdevs\n"); 2375 return (DCMD_OK); 2376 } 2377 2378 if (spa_flags & SPA_FLAG_ERRORS) 2379 strcat(opts, "e"); 2380 if (spa_flags & SPA_FLAG_METASLABS) 2381 strcat(opts, "m"); 2382 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 2383 strcat(opts, "M"); 2384 if (spa_flags & SPA_FLAG_HISTOGRAMS) 2385 strcat(opts, "h"); 2386 2387 v[0].a_type = MDB_TYPE_STRING; 2388 v[0].a_un.a_str = opts; 2389 2390 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 2391 flags, 1, v); 2392 if (ret != DCMD_OK) 2393 return (ret); 2394 2395 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 2396 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 2397 return (DCMD_ERR); 2398 2399 return (DCMD_OK); 2400 } 2401 2402 /* 2403 * ::zio 2404 * 2405 * Print a summary of zio_t and all its children. This is intended to display a 2406 * zio tree, and hence we only pick the most important pieces of information for 2407 * the main summary. More detailed information can always be found by doing a 2408 * '::print zio' on the underlying zio_t. The columns we display are: 2409 * 2410 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED 2411 * 2412 * The 'address' column is indented by one space for each depth level as we 2413 * descend down the tree. 2414 */ 2415 2416 #define ZIO_MAXINDENT 7 2417 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 2418 #define ZIO_WALK_SELF 0 2419 #define ZIO_WALK_CHILD 1 2420 #define ZIO_WALK_PARENT 2 2421 2422 typedef struct zio_print_args { 2423 int zpa_current_depth; 2424 int zpa_min_depth; 2425 int zpa_max_depth; 2426 int zpa_type; 2427 uint_t zpa_flags; 2428 } zio_print_args_t; 2429 2430 typedef struct mdb_zio { 2431 enum zio_type io_type; 2432 enum zio_stage io_stage; 2433 uintptr_t io_waiter; 2434 uintptr_t io_spa; 2435 struct { 2436 struct { 2437 uintptr_t list_next; 2438 } list_head; 2439 } io_parent_list; 2440 int io_error; 2441 } mdb_zio_t; 2442 2443 typedef struct mdb_zio_timestamp { 2444 hrtime_t io_timestamp; 2445 } mdb_zio_timestamp_t; 2446 2447 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 2448 2449 static int 2450 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) 2451 { 2452 mdb_ctf_id_t type_enum, stage_enum; 2453 int indent = zpa->zpa_current_depth; 2454 const char *type, *stage; 2455 uintptr_t laddr; 2456 mdb_zio_t zio; 2457 mdb_zio_timestamp_t zio_timestamp = { 0 }; 2458 2459 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) 2460 return (WALK_ERR); 2461 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", 2462 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); 2463 2464 if (indent > ZIO_MAXINDENT) 2465 indent = ZIO_MAXINDENT; 2466 2467 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 2468 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 2469 mdb_warn("failed to lookup zio enums"); 2470 return (WALK_ERR); 2471 } 2472 2473 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) 2474 type += sizeof ("ZIO_TYPE_") - 1; 2475 else 2476 type = "?"; 2477 2478 if (zio.io_error == 0) { 2479 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); 2480 if (stage != NULL) 2481 stage += sizeof ("ZIO_STAGE_") - 1; 2482 else 2483 stage = "?"; 2484 } else { 2485 stage = "FAILED"; 2486 } 2487 2488 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 2489 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 2490 mdb_printf("%?p\n", addr); 2491 } else { 2492 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 2493 ZIO_MAXWIDTH - indent, addr, type, stage); 2494 if (zio.io_waiter != 0) 2495 mdb_printf("%-16lx ", zio.io_waiter); 2496 else 2497 mdb_printf("%-16s ", "-"); 2498 #ifdef _KERNEL 2499 if (zio_timestamp.io_timestamp != 0) { 2500 mdb_printf("%llums", (mdb_gethrtime() - 2501 zio_timestamp.io_timestamp) / 2502 1000000); 2503 } else { 2504 mdb_printf("%-12s ", "-"); 2505 } 2506 #else 2507 mdb_printf("%-12s ", "-"); 2508 #endif 2509 mdb_printf("\n"); 2510 } 2511 } 2512 2513 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 2514 return (WALK_NEXT); 2515 2516 if (zpa->zpa_type == ZIO_WALK_PARENT) 2517 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2518 "io_parent_list"); 2519 else 2520 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2521 "io_child_list"); 2522 2523 zpa->zpa_current_depth++; 2524 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 2525 mdb_warn("failed to walk zio_t children at %p\n", laddr); 2526 return (WALK_ERR); 2527 } 2528 zpa->zpa_current_depth--; 2529 2530 return (WALK_NEXT); 2531 } 2532 2533 /* ARGSUSED */ 2534 static int 2535 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 2536 { 2537 zio_link_t zl; 2538 uintptr_t ziop; 2539 zio_print_args_t *zpa = arg; 2540 2541 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 2542 mdb_warn("failed to read zio_link_t at %p", addr); 2543 return (WALK_ERR); 2544 } 2545 2546 if (zpa->zpa_type == ZIO_WALK_PARENT) 2547 ziop = (uintptr_t)zl.zl_parent; 2548 else 2549 ziop = (uintptr_t)zl.zl_child; 2550 2551 return (zio_print_cb(ziop, zpa)); 2552 } 2553 2554 /* ARGSUSED */ 2555 static int 2556 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2557 { 2558 zio_print_args_t zpa = { 0 }; 2559 2560 if (!(flags & DCMD_ADDRSPEC)) 2561 return (DCMD_USAGE); 2562 2563 if (mdb_getopts(argc, argv, 2564 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 2565 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 2566 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, 2567 NULL) != argc) 2568 return (DCMD_USAGE); 2569 2570 zpa.zpa_flags = flags; 2571 if (zpa.zpa_max_depth != 0) { 2572 if (zpa.zpa_type == ZIO_WALK_SELF) 2573 zpa.zpa_type = ZIO_WALK_CHILD; 2574 } else if (zpa.zpa_type != ZIO_WALK_SELF) { 2575 zpa.zpa_min_depth = 1; 2576 zpa.zpa_max_depth = 1; 2577 } 2578 2579 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 2580 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n", 2581 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", 2582 "TIME_ELAPSED"); 2583 } 2584 2585 if (zio_print_cb(addr, &zpa) != WALK_NEXT) 2586 return (DCMD_ERR); 2587 2588 return (DCMD_OK); 2589 } 2590 2591 /* 2592 * [addr]::zio_state 2593 * 2594 * Print a summary of all zio_t structures on the system, or for a particular 2595 * pool. This is equivalent to '::walk zio_root | ::zio'. 2596 */ 2597 /*ARGSUSED*/ 2598 static int 2599 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2600 { 2601 /* 2602 * MDB will remember the last address of the pipeline, so if we don't 2603 * zero this we'll end up trying to walk zio structures for a 2604 * non-existent spa_t. 2605 */ 2606 if (!(flags & DCMD_ADDRSPEC)) 2607 addr = 0; 2608 2609 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 2610 } 2611 2612 typedef struct mdb_multilist { 2613 uint64_t ml_num_sublists; 2614 uintptr_t ml_sublists; 2615 } mdb_multilist_t; 2616 2617 typedef struct multilist_walk_data { 2618 uint64_t mwd_idx; 2619 mdb_multilist_t mwd_ml; 2620 } multilist_walk_data_t; 2621 2622 /* ARGSUSED */ 2623 static int 2624 multilist_print_cb(uintptr_t addr, const void *unknown, void *arg) 2625 { 2626 mdb_printf("%#lr\n", addr); 2627 return (WALK_NEXT); 2628 } 2629 2630 static int 2631 multilist_walk_step(mdb_walk_state_t *wsp) 2632 { 2633 multilist_walk_data_t *mwd = wsp->walk_data; 2634 2635 if (mwd->mwd_idx >= mwd->mwd_ml.ml_num_sublists) 2636 return (WALK_DONE); 2637 2638 wsp->walk_addr = mwd->mwd_ml.ml_sublists + 2639 mdb_ctf_sizeof_by_name("multilist_sublist_t") * mwd->mwd_idx + 2640 mdb_ctf_offsetof_by_name("multilist_sublist_t", "mls_list"); 2641 2642 mdb_pwalk("list", multilist_print_cb, (void*)NULL, wsp->walk_addr); 2643 mwd->mwd_idx++; 2644 2645 return (WALK_NEXT); 2646 } 2647 2648 static int 2649 multilist_walk_init(mdb_walk_state_t *wsp) 2650 { 2651 multilist_walk_data_t *mwd; 2652 2653 if (wsp->walk_addr == 0) { 2654 mdb_warn("must supply address of multilist_t\n"); 2655 return (WALK_ERR); 2656 } 2657 2658 mwd = mdb_zalloc(sizeof (multilist_walk_data_t), UM_SLEEP | UM_GC); 2659 if (mdb_ctf_vread(&mwd->mwd_ml, "multilist_t", "mdb_multilist_t", 2660 wsp->walk_addr, 0) == -1) { 2661 return (WALK_ERR); 2662 } 2663 2664 if (mwd->mwd_ml.ml_num_sublists == 0 || 2665 mwd->mwd_ml.ml_sublists == 0) { 2666 mdb_warn("invalid or uninitialized multilist at %#lx\n", 2667 wsp->walk_addr); 2668 return (WALK_ERR); 2669 } 2670 2671 wsp->walk_data = mwd; 2672 return (WALK_NEXT); 2673 } 2674 2675 typedef struct mdb_txg_list { 2676 size_t tl_offset; 2677 uintptr_t tl_head[TXG_SIZE]; 2678 } mdb_txg_list_t; 2679 2680 typedef struct txg_list_walk_data { 2681 uintptr_t lw_head[TXG_SIZE]; 2682 int lw_txgoff; 2683 int lw_maxoff; 2684 size_t lw_offset; 2685 void *lw_obj; 2686 } txg_list_walk_data_t; 2687 2688 static int 2689 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 2690 { 2691 txg_list_walk_data_t *lwd; 2692 mdb_txg_list_t list; 2693 int i; 2694 2695 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 2696 if (mdb_ctf_vread(&list, "txg_list_t", "mdb_txg_list_t", wsp->walk_addr, 2697 0) == -1) { 2698 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 2699 return (WALK_ERR); 2700 } 2701 2702 for (i = 0; i < TXG_SIZE; i++) 2703 lwd->lw_head[i] = list.tl_head[i]; 2704 lwd->lw_offset = list.tl_offset; 2705 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 2706 UM_SLEEP | UM_GC); 2707 lwd->lw_txgoff = txg; 2708 lwd->lw_maxoff = maxoff; 2709 2710 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2711 wsp->walk_data = lwd; 2712 2713 return (WALK_NEXT); 2714 } 2715 2716 static int 2717 txg_list_walk_init(mdb_walk_state_t *wsp) 2718 { 2719 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 2720 } 2721 2722 static int 2723 txg_list0_walk_init(mdb_walk_state_t *wsp) 2724 { 2725 return (txg_list_walk_init_common(wsp, 0, 0)); 2726 } 2727 2728 static int 2729 txg_list1_walk_init(mdb_walk_state_t *wsp) 2730 { 2731 return (txg_list_walk_init_common(wsp, 1, 1)); 2732 } 2733 2734 static int 2735 txg_list2_walk_init(mdb_walk_state_t *wsp) 2736 { 2737 return (txg_list_walk_init_common(wsp, 2, 2)); 2738 } 2739 2740 static int 2741 txg_list3_walk_init(mdb_walk_state_t *wsp) 2742 { 2743 return (txg_list_walk_init_common(wsp, 3, 3)); 2744 } 2745 2746 static int 2747 txg_list_walk_step(mdb_walk_state_t *wsp) 2748 { 2749 txg_list_walk_data_t *lwd = wsp->walk_data; 2750 uintptr_t addr; 2751 txg_node_t *node; 2752 int status; 2753 2754 while (wsp->walk_addr == 0 && lwd->lw_txgoff < lwd->lw_maxoff) { 2755 lwd->lw_txgoff++; 2756 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2757 } 2758 2759 if (wsp->walk_addr == 0) 2760 return (WALK_DONE); 2761 2762 addr = wsp->walk_addr - lwd->lw_offset; 2763 2764 if (mdb_vread(lwd->lw_obj, 2765 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 2766 mdb_warn("failed to read list element at %#lx", addr); 2767 return (WALK_ERR); 2768 } 2769 2770 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 2771 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 2772 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 2773 2774 return (status); 2775 } 2776 2777 /* 2778 * ::walk spa 2779 * 2780 * Walk all named spa_t structures in the namespace. This is nothing more than 2781 * a layered avl walk. 2782 */ 2783 static int 2784 spa_walk_init(mdb_walk_state_t *wsp) 2785 { 2786 GElf_Sym sym; 2787 2788 if (wsp->walk_addr != 0) { 2789 mdb_warn("spa walk only supports global walks\n"); 2790 return (WALK_ERR); 2791 } 2792 2793 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 2794 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 2795 return (WALK_ERR); 2796 } 2797 2798 wsp->walk_addr = (uintptr_t)sym.st_value; 2799 2800 if (mdb_layered_walk("avl", wsp) == -1) { 2801 mdb_warn("failed to walk 'avl'\n"); 2802 return (WALK_ERR); 2803 } 2804 2805 return (WALK_NEXT); 2806 } 2807 2808 static int 2809 spa_walk_step(mdb_walk_state_t *wsp) 2810 { 2811 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata)); 2812 } 2813 2814 /* 2815 * [addr]::walk zio 2816 * 2817 * Walk all active zio_t structures on the system. This is simply a layered 2818 * walk on top of ::walk zio_cache, with the optional ability to limit the 2819 * structures to a particular pool. 2820 */ 2821 static int 2822 zio_walk_init(mdb_walk_state_t *wsp) 2823 { 2824 wsp->walk_data = (void *)wsp->walk_addr; 2825 2826 if (mdb_layered_walk("zio_cache", wsp) == -1) { 2827 mdb_warn("failed to walk 'zio_cache'\n"); 2828 return (WALK_ERR); 2829 } 2830 2831 return (WALK_NEXT); 2832 } 2833 2834 static int 2835 zio_walk_step(mdb_walk_state_t *wsp) 2836 { 2837 mdb_zio_t zio; 2838 uintptr_t spa = (uintptr_t)wsp->walk_data; 2839 2840 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2841 wsp->walk_addr, 0) == -1) 2842 return (WALK_ERR); 2843 2844 if (spa != 0 && spa != zio.io_spa) 2845 return (WALK_NEXT); 2846 2847 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2848 } 2849 2850 /* 2851 * [addr]::walk zio_root 2852 * 2853 * Walk only root zio_t structures, optionally for a particular spa_t. 2854 */ 2855 static int 2856 zio_walk_root_step(mdb_walk_state_t *wsp) 2857 { 2858 mdb_zio_t zio; 2859 uintptr_t spa = (uintptr_t)wsp->walk_data; 2860 2861 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2862 wsp->walk_addr, 0) == -1) 2863 return (WALK_ERR); 2864 2865 if (spa != 0 && spa != zio.io_spa) 2866 return (WALK_NEXT); 2867 2868 /* If the parent list is not empty, ignore */ 2869 if (zio.io_parent_list.list_head.list_next != 2870 wsp->walk_addr + 2871 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + 2872 mdb_ctf_offsetof_by_name("struct list", "list_head")) 2873 return (WALK_NEXT); 2874 2875 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2876 } 2877 2878 /* 2879 * ::zfs_blkstats 2880 * 2881 * -v print verbose per-level information 2882 * 2883 */ 2884 static int 2885 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2886 { 2887 boolean_t verbose = B_FALSE; 2888 zfs_all_blkstats_t stats; 2889 dmu_object_type_t t; 2890 zfs_blkstat_t *tzb; 2891 uint64_t ditto; 2892 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; 2893 /* +10 in case it grew */ 2894 2895 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { 2896 mdb_warn("failed to read 'dmu_ot'"); 2897 return (DCMD_ERR); 2898 } 2899 2900 if (mdb_getopts(argc, argv, 2901 'v', MDB_OPT_SETBITS, TRUE, &verbose, 2902 NULL) != argc) 2903 return (DCMD_USAGE); 2904 2905 if (!(flags & DCMD_ADDRSPEC)) 2906 return (DCMD_USAGE); 2907 2908 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || 2909 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || 2910 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 2911 mdb_warn("failed to read data at %p;", addr); 2912 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 2913 return (DCMD_ERR); 2914 } 2915 2916 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 2917 if (tzb->zb_gangs != 0) { 2918 mdb_printf("Ganged blocks: %llu\n", 2919 (longlong_t)tzb->zb_gangs); 2920 } 2921 2922 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 2923 tzb->zb_ditto_3_of_3_samevdev; 2924 if (ditto != 0) { 2925 mdb_printf("Dittoed blocks on same vdev: %llu\n", 2926 (longlong_t)ditto); 2927 } 2928 2929 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 2930 "\t avg\t comp\t%%Total\tType\n"); 2931 2932 for (t = 0; t <= DMU_OT_TOTAL; t++) { 2933 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; 2934 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; 2935 char avg[NICENUM_BUFLEN]; 2936 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; 2937 char typename[64]; 2938 int l; 2939 2940 2941 if (t == DMU_OT_DEFERRED) 2942 strcpy(typename, "deferred free"); 2943 else if (t == DMU_OT_OTHER) 2944 strcpy(typename, "other"); 2945 else if (t == DMU_OT_TOTAL) 2946 strcpy(typename, "Total"); 2947 else if (mdb_readstr(typename, sizeof (typename), 2948 (uintptr_t)dmu_ot[t].ot_name) == -1) { 2949 mdb_warn("failed to read type name"); 2950 return (DCMD_ERR); 2951 } 2952 2953 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 2954 continue; 2955 2956 for (l = -1; l < DN_MAX_LEVELS; l++) { 2957 int level = (l == -1 ? DN_MAX_LEVELS : l); 2958 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 2959 2960 if (zb->zb_asize == 0) 2961 continue; 2962 2963 /* 2964 * Don't print each level unless requested. 2965 */ 2966 if (!verbose && level != DN_MAX_LEVELS) 2967 continue; 2968 2969 /* 2970 * If all the space is level 0, don't print the 2971 * level 0 separately. 2972 */ 2973 if (level == 0 && zb->zb_asize == 2974 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 2975 continue; 2976 2977 mdb_nicenum(zb->zb_count, csize); 2978 mdb_nicenum(zb->zb_lsize, lsize); 2979 mdb_nicenum(zb->zb_psize, psize); 2980 mdb_nicenum(zb->zb_asize, asize); 2981 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 2982 (void) snprintfrac(comp, NICENUM_BUFLEN, 2983 zb->zb_lsize, zb->zb_psize, 2); 2984 (void) snprintfrac(pct, NICENUM_BUFLEN, 2985 100 * zb->zb_asize, tzb->zb_asize, 2); 2986 2987 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 2988 "\t%5s\t%6s\t", 2989 csize, lsize, psize, asize, avg, comp, pct); 2990 2991 if (level == DN_MAX_LEVELS) 2992 mdb_printf("%s\n", typename); 2993 else 2994 mdb_printf(" L%d %s\n", 2995 level, typename); 2996 } 2997 } 2998 2999 return (DCMD_OK); 3000 } 3001 3002 typedef struct mdb_reference { 3003 uintptr_t ref_holder; 3004 uintptr_t ref_removed; 3005 uint64_t ref_number; 3006 } mdb_reference_t; 3007 3008 /* ARGSUSED */ 3009 static int 3010 reference_cb(uintptr_t addr, const void *ignored, void *arg) 3011 { 3012 mdb_reference_t ref; 3013 boolean_t holder_is_str = B_FALSE; 3014 char holder_str[128]; 3015 boolean_t removed = (boolean_t)arg; 3016 3017 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr, 3018 0) == -1) 3019 return (DCMD_ERR); 3020 3021 if (mdb_readstr(holder_str, sizeof (holder_str), 3022 ref.ref_holder) != -1) 3023 holder_is_str = strisprint(holder_str); 3024 3025 if (removed) 3026 mdb_printf("removed "); 3027 mdb_printf("reference "); 3028 if (ref.ref_number != 1) 3029 mdb_printf("with count=%llu ", ref.ref_number); 3030 mdb_printf("with tag %lx", ref.ref_holder); 3031 if (holder_is_str) 3032 mdb_printf(" \"%s\"", holder_str); 3033 mdb_printf(", held at:\n"); 3034 3035 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 3036 3037 if (removed) { 3038 mdb_printf("removed at:\n"); 3039 (void) mdb_call_dcmd("whatis", ref.ref_removed, 3040 DCMD_ADDRSPEC, 0, NULL); 3041 } 3042 3043 mdb_printf("\n"); 3044 3045 return (WALK_NEXT); 3046 } 3047 3048 typedef struct mdb_refcount { 3049 uint64_t rc_count; 3050 } mdb_refcount_t; 3051 3052 typedef struct mdb_refcount_removed { 3053 uint64_t rc_removed_count; 3054 } mdb_refcount_removed_t; 3055 3056 typedef struct mdb_refcount_tracked { 3057 boolean_t rc_tracked; 3058 } mdb_refcount_tracked_t; 3059 3060 /* ARGSUSED */ 3061 static int 3062 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3063 { 3064 mdb_refcount_t rc; 3065 mdb_refcount_removed_t rcr; 3066 mdb_refcount_tracked_t rct; 3067 int off; 3068 boolean_t released = B_FALSE; 3069 3070 if (!(flags & DCMD_ADDRSPEC)) 3071 return (DCMD_USAGE); 3072 3073 if (mdb_getopts(argc, argv, 3074 'r', MDB_OPT_SETBITS, B_TRUE, &released, 3075 NULL) != argc) 3076 return (DCMD_USAGE); 3077 3078 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr, 3079 0) == -1) 3080 return (DCMD_ERR); 3081 3082 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr, 3083 MDB_CTF_VREAD_QUIET) == -1) { 3084 mdb_printf("refcount_t at %p has %llu holds (untracked)\n", 3085 addr, (longlong_t)rc.rc_count); 3086 return (DCMD_OK); 3087 } 3088 3089 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr, 3090 MDB_CTF_VREAD_QUIET) == -1) { 3091 /* If this is an old target, it might be tracked. */ 3092 rct.rc_tracked = B_TRUE; 3093 } 3094 3095 mdb_printf("refcount_t at %p has %llu current holds, " 3096 "%llu recently released holds\n", 3097 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count); 3098 3099 if (rct.rc_tracked && rc.rc_count > 0) 3100 mdb_printf("current holds:\n"); 3101 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list"); 3102 if (off == -1) 3103 return (DCMD_ERR); 3104 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 3105 3106 if (released && rcr.rc_removed_count > 0) { 3107 mdb_printf("released holds:\n"); 3108 3109 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed"); 3110 if (off == -1) 3111 return (DCMD_ERR); 3112 mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off); 3113 } 3114 3115 return (DCMD_OK); 3116 } 3117 3118 /* ARGSUSED */ 3119 static int 3120 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3121 { 3122 sa_attr_table_t *table; 3123 sa_os_t sa_os; 3124 char *name; 3125 int i; 3126 3127 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 3128 mdb_warn("failed to read sa_os at %p", addr); 3129 return (DCMD_ERR); 3130 } 3131 3132 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 3133 UM_SLEEP | UM_GC); 3134 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 3135 3136 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 3137 (uintptr_t)sa_os.sa_attr_table) == -1) { 3138 mdb_warn("failed to read sa_os at %p", addr); 3139 return (DCMD_ERR); 3140 } 3141 3142 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 3143 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 3144 for (i = 0; i != sa_os.sa_num_attrs; i++) { 3145 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 3146 mdb_printf("%5x %8x %8x %8x %-s\n", 3147 (int)table[i].sa_attr, (int)table[i].sa_registered, 3148 (int)table[i].sa_length, table[i].sa_byteswap, name); 3149 } 3150 3151 return (DCMD_OK); 3152 } 3153 3154 static int 3155 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 3156 { 3157 uintptr_t idx_table; 3158 3159 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { 3160 mdb_printf("can't find offset table in sa_idx_tab\n"); 3161 return (-1); 3162 } 3163 3164 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 3165 UM_SLEEP | UM_GC); 3166 3167 if (mdb_vread(*off_tab, 3168 attr_count * sizeof (uint32_t), idx_table) == -1) { 3169 mdb_warn("failed to attribute offset table %p", idx_table); 3170 return (-1); 3171 } 3172 3173 return (DCMD_OK); 3174 } 3175 3176 /*ARGSUSED*/ 3177 static int 3178 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3179 { 3180 uint32_t *offset_tab; 3181 int attr_count; 3182 uint64_t attr_id; 3183 uintptr_t attr_addr; 3184 uintptr_t bonus_tab, spill_tab; 3185 uintptr_t db_bonus, db_spill; 3186 uintptr_t os, os_sa; 3187 uintptr_t db_data; 3188 3189 if (argc != 1) 3190 return (DCMD_USAGE); 3191 3192 if (argv[0].a_type == MDB_TYPE_STRING) 3193 attr_id = mdb_strtoull(argv[0].a_un.a_str); 3194 else 3195 return (DCMD_USAGE); 3196 3197 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || 3198 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || 3199 GETMEMB(addr, "sa_handle", sa_os, os) || 3200 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || 3201 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { 3202 mdb_printf("Can't find necessary information in sa_handle " 3203 "in sa_handle\n"); 3204 return (DCMD_ERR); 3205 } 3206 3207 if (GETMEMB(os, "objset", os_sa, os_sa)) { 3208 mdb_printf("Can't find os_sa in objset\n"); 3209 return (DCMD_ERR); 3210 } 3211 3212 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { 3213 mdb_printf("Can't find sa_num_attrs\n"); 3214 return (DCMD_ERR); 3215 } 3216 3217 if (attr_id > attr_count) { 3218 mdb_printf("attribute id number is out of range\n"); 3219 return (DCMD_ERR); 3220 } 3221 3222 if (bonus_tab) { 3223 if (sa_get_off_table(bonus_tab, &offset_tab, 3224 attr_count) == -1) { 3225 return (DCMD_ERR); 3226 } 3227 3228 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { 3229 mdb_printf("can't find db_data in bonus dbuf\n"); 3230 return (DCMD_ERR); 3231 } 3232 } 3233 3234 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 3235 spill_tab == 0) { 3236 mdb_printf("Attribute does not exist\n"); 3237 return (DCMD_ERR); 3238 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 3239 if (sa_get_off_table(spill_tab, &offset_tab, 3240 attr_count) == -1) { 3241 return (DCMD_ERR); 3242 } 3243 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { 3244 mdb_printf("can't find db_data in spill dbuf\n"); 3245 return (DCMD_ERR); 3246 } 3247 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 3248 mdb_printf("Attribute does not exist\n"); 3249 return (DCMD_ERR); 3250 } 3251 } 3252 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 3253 mdb_printf("%p\n", attr_addr); 3254 return (DCMD_OK); 3255 } 3256 3257 /* ARGSUSED */ 3258 static int 3259 zfs_ace_print_common(uintptr_t addr, uint_t flags, 3260 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 3261 uint16_t ace_type, int verbose) 3262 { 3263 if (DCMD_HDRSPEC(flags) && !verbose) 3264 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 3265 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 3266 3267 if (!verbose) { 3268 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 3269 ace_flags, access_mask, ace_type, id); 3270 return (DCMD_OK); 3271 } 3272 3273 switch (ace_flags & ACE_TYPE_FLAGS) { 3274 case ACE_OWNER: 3275 mdb_printf("owner@:"); 3276 break; 3277 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 3278 mdb_printf("group@:"); 3279 break; 3280 case ACE_EVERYONE: 3281 mdb_printf("everyone@:"); 3282 break; 3283 case ACE_IDENTIFIER_GROUP: 3284 mdb_printf("group:%llx:", (u_longlong_t)id); 3285 break; 3286 case 0: /* User entry */ 3287 mdb_printf("user:%llx:", (u_longlong_t)id); 3288 break; 3289 } 3290 3291 /* print out permission mask */ 3292 if (access_mask & ACE_READ_DATA) 3293 mdb_printf("r"); 3294 else 3295 mdb_printf("-"); 3296 if (access_mask & ACE_WRITE_DATA) 3297 mdb_printf("w"); 3298 else 3299 mdb_printf("-"); 3300 if (access_mask & ACE_EXECUTE) 3301 mdb_printf("x"); 3302 else 3303 mdb_printf("-"); 3304 if (access_mask & ACE_APPEND_DATA) 3305 mdb_printf("p"); 3306 else 3307 mdb_printf("-"); 3308 if (access_mask & ACE_DELETE) 3309 mdb_printf("d"); 3310 else 3311 mdb_printf("-"); 3312 if (access_mask & ACE_DELETE_CHILD) 3313 mdb_printf("D"); 3314 else 3315 mdb_printf("-"); 3316 if (access_mask & ACE_READ_ATTRIBUTES) 3317 mdb_printf("a"); 3318 else 3319 mdb_printf("-"); 3320 if (access_mask & ACE_WRITE_ATTRIBUTES) 3321 mdb_printf("A"); 3322 else 3323 mdb_printf("-"); 3324 if (access_mask & ACE_READ_NAMED_ATTRS) 3325 mdb_printf("R"); 3326 else 3327 mdb_printf("-"); 3328 if (access_mask & ACE_WRITE_NAMED_ATTRS) 3329 mdb_printf("W"); 3330 else 3331 mdb_printf("-"); 3332 if (access_mask & ACE_READ_ACL) 3333 mdb_printf("c"); 3334 else 3335 mdb_printf("-"); 3336 if (access_mask & ACE_WRITE_ACL) 3337 mdb_printf("C"); 3338 else 3339 mdb_printf("-"); 3340 if (access_mask & ACE_WRITE_OWNER) 3341 mdb_printf("o"); 3342 else 3343 mdb_printf("-"); 3344 if (access_mask & ACE_SYNCHRONIZE) 3345 mdb_printf("s"); 3346 else 3347 mdb_printf("-"); 3348 3349 mdb_printf(":"); 3350 3351 /* Print out inheritance flags */ 3352 if (ace_flags & ACE_FILE_INHERIT_ACE) 3353 mdb_printf("f"); 3354 else 3355 mdb_printf("-"); 3356 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 3357 mdb_printf("d"); 3358 else 3359 mdb_printf("-"); 3360 if (ace_flags & ACE_INHERIT_ONLY_ACE) 3361 mdb_printf("i"); 3362 else 3363 mdb_printf("-"); 3364 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 3365 mdb_printf("n"); 3366 else 3367 mdb_printf("-"); 3368 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 3369 mdb_printf("S"); 3370 else 3371 mdb_printf("-"); 3372 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 3373 mdb_printf("F"); 3374 else 3375 mdb_printf("-"); 3376 if (ace_flags & ACE_INHERITED_ACE) 3377 mdb_printf("I"); 3378 else 3379 mdb_printf("-"); 3380 3381 switch (ace_type) { 3382 case ACE_ACCESS_ALLOWED_ACE_TYPE: 3383 mdb_printf(":allow\n"); 3384 break; 3385 case ACE_ACCESS_DENIED_ACE_TYPE: 3386 mdb_printf(":deny\n"); 3387 break; 3388 case ACE_SYSTEM_AUDIT_ACE_TYPE: 3389 mdb_printf(":audit\n"); 3390 break; 3391 case ACE_SYSTEM_ALARM_ACE_TYPE: 3392 mdb_printf(":alarm\n"); 3393 break; 3394 default: 3395 mdb_printf(":?\n"); 3396 } 3397 return (DCMD_OK); 3398 } 3399 3400 /* ARGSUSED */ 3401 static int 3402 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3403 { 3404 zfs_ace_t zace; 3405 int verbose = FALSE; 3406 uint64_t id; 3407 3408 if (!(flags & DCMD_ADDRSPEC)) 3409 return (DCMD_USAGE); 3410 3411 if (mdb_getopts(argc, argv, 3412 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3413 return (DCMD_USAGE); 3414 3415 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 3416 mdb_warn("failed to read zfs_ace_t"); 3417 return (DCMD_ERR); 3418 } 3419 3420 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 3421 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 3422 id = zace.z_fuid; 3423 else 3424 id = -1; 3425 3426 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 3427 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 3428 } 3429 3430 /* ARGSUSED */ 3431 static int 3432 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3433 { 3434 ace_t ace; 3435 uint64_t id; 3436 int verbose = FALSE; 3437 3438 if (!(flags & DCMD_ADDRSPEC)) 3439 return (DCMD_USAGE); 3440 3441 if (mdb_getopts(argc, argv, 3442 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3443 return (DCMD_USAGE); 3444 3445 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 3446 mdb_warn("failed to read ace_t"); 3447 return (DCMD_ERR); 3448 } 3449 3450 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 3451 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 3452 id = ace.a_who; 3453 else 3454 id = -1; 3455 3456 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 3457 ace.a_flags, ace.a_type, verbose)); 3458 } 3459 3460 typedef struct acl_dump_args { 3461 int a_argc; 3462 const mdb_arg_t *a_argv; 3463 uint16_t a_version; 3464 int a_flags; 3465 } acl_dump_args_t; 3466 3467 /* ARGSUSED */ 3468 static int 3469 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 3470 { 3471 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 3472 3473 if (acl_args->a_version == 1) { 3474 if (mdb_call_dcmd("zfs_ace", addr, 3475 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 3476 acl_args->a_argv) != DCMD_OK) { 3477 return (WALK_ERR); 3478 } 3479 } else { 3480 if (mdb_call_dcmd("zfs_ace0", addr, 3481 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 3482 acl_args->a_argv) != DCMD_OK) { 3483 return (WALK_ERR); 3484 } 3485 } 3486 acl_args->a_flags = DCMD_LOOP; 3487 return (WALK_NEXT); 3488 } 3489 3490 /* ARGSUSED */ 3491 static int 3492 acl_cb(uintptr_t addr, const void *unknown, void *arg) 3493 { 3494 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 3495 3496 if (acl_args->a_version == 1) { 3497 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 3498 arg, addr) != 0) { 3499 mdb_warn("can't walk ACEs"); 3500 return (DCMD_ERR); 3501 } 3502 } else { 3503 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 3504 arg, addr) != 0) { 3505 mdb_warn("can't walk ACEs"); 3506 return (DCMD_ERR); 3507 } 3508 } 3509 return (WALK_NEXT); 3510 } 3511 3512 /* ARGSUSED */ 3513 static int 3514 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3515 { 3516 zfs_acl_t zacl; 3517 int verbose = FALSE; 3518 acl_dump_args_t acl_args; 3519 3520 if (!(flags & DCMD_ADDRSPEC)) 3521 return (DCMD_USAGE); 3522 3523 if (mdb_getopts(argc, argv, 3524 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3525 return (DCMD_USAGE); 3526 3527 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 3528 mdb_warn("failed to read zfs_acl_t"); 3529 return (DCMD_ERR); 3530 } 3531 3532 acl_args.a_argc = argc; 3533 acl_args.a_argv = argv; 3534 acl_args.a_version = zacl.z_version; 3535 acl_args.a_flags = DCMD_LOOPFIRST; 3536 3537 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 3538 mdb_warn("can't walk ACL"); 3539 return (DCMD_ERR); 3540 } 3541 3542 return (DCMD_OK); 3543 } 3544 3545 /* ARGSUSED */ 3546 static int 3547 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 3548 { 3549 if (wsp->walk_addr == 0) { 3550 mdb_warn("must supply address of zfs_acl_node_t\n"); 3551 return (WALK_ERR); 3552 } 3553 3554 wsp->walk_addr += 3555 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); 3556 3557 if (mdb_layered_walk("list", wsp) == -1) { 3558 mdb_warn("failed to walk 'list'\n"); 3559 return (WALK_ERR); 3560 } 3561 3562 return (WALK_NEXT); 3563 } 3564 3565 static int 3566 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 3567 { 3568 zfs_acl_node_t aclnode; 3569 3570 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 3571 wsp->walk_addr) == -1) { 3572 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 3573 return (WALK_ERR); 3574 } 3575 3576 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 3577 } 3578 3579 typedef struct ace_walk_data { 3580 int ace_count; 3581 int ace_version; 3582 } ace_walk_data_t; 3583 3584 static int 3585 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 3586 int ace_count, uintptr_t ace_data) 3587 { 3588 ace_walk_data_t *ace_walk_data; 3589 3590 if (wsp->walk_addr == 0) { 3591 mdb_warn("must supply address of zfs_acl_node_t\n"); 3592 return (WALK_ERR); 3593 } 3594 3595 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 3596 3597 ace_walk_data->ace_count = ace_count; 3598 ace_walk_data->ace_version = version; 3599 3600 wsp->walk_addr = ace_data; 3601 wsp->walk_data = ace_walk_data; 3602 3603 return (WALK_NEXT); 3604 } 3605 3606 static int 3607 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 3608 { 3609 static int gotid; 3610 static mdb_ctf_id_t acl_id; 3611 int z_ace_count; 3612 uintptr_t z_acldata; 3613 3614 if (!gotid) { 3615 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 3616 &acl_id) == -1) { 3617 mdb_warn("couldn't find struct zfs_acl_node"); 3618 return (DCMD_ERR); 3619 } 3620 gotid = TRUE; 3621 } 3622 3623 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 3624 return (DCMD_ERR); 3625 } 3626 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 3627 return (DCMD_ERR); 3628 } 3629 3630 return (zfs_aces_walk_init_common(wsp, version, 3631 z_ace_count, z_acldata)); 3632 } 3633 3634 /* ARGSUSED */ 3635 static int 3636 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 3637 { 3638 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 3639 } 3640 3641 /* ARGSUSED */ 3642 static int 3643 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 3644 { 3645 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 3646 } 3647 3648 static int 3649 zfs_aces_walk_step(mdb_walk_state_t *wsp) 3650 { 3651 ace_walk_data_t *ace_data = wsp->walk_data; 3652 zfs_ace_t zace; 3653 ace_t *acep; 3654 int status; 3655 int entry_type; 3656 int allow_type; 3657 uintptr_t ptr; 3658 3659 if (ace_data->ace_count == 0) 3660 return (WALK_DONE); 3661 3662 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 3663 mdb_warn("failed to read zfs_ace_t at %#lx", 3664 wsp->walk_addr); 3665 return (WALK_ERR); 3666 } 3667 3668 switch (ace_data->ace_version) { 3669 case 0: 3670 acep = (ace_t *)&zace; 3671 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 3672 allow_type = acep->a_type; 3673 break; 3674 case 1: 3675 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 3676 allow_type = zace.z_hdr.z_type; 3677 break; 3678 default: 3679 return (WALK_ERR); 3680 } 3681 3682 ptr = (uintptr_t)wsp->walk_addr; 3683 switch (entry_type) { 3684 case ACE_OWNER: 3685 case ACE_EVERYONE: 3686 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 3687 ptr += ace_data->ace_version == 0 ? 3688 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 3689 break; 3690 case ACE_IDENTIFIER_GROUP: 3691 default: 3692 switch (allow_type) { 3693 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 3694 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 3695 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 3696 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 3697 ptr += ace_data->ace_version == 0 ? 3698 sizeof (ace_t) : sizeof (zfs_object_ace_t); 3699 break; 3700 default: 3701 ptr += ace_data->ace_version == 0 ? 3702 sizeof (ace_t) : sizeof (zfs_ace_t); 3703 break; 3704 } 3705 } 3706 3707 ace_data->ace_count--; 3708 status = wsp->walk_callback(wsp->walk_addr, 3709 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 3710 3711 wsp->walk_addr = ptr; 3712 return (status); 3713 } 3714 3715 typedef struct mdb_zfs_rrwlock { 3716 uintptr_t rr_writer; 3717 boolean_t rr_writer_wanted; 3718 } mdb_zfs_rrwlock_t; 3719 3720 static uint_t rrw_key; 3721 3722 /* ARGSUSED */ 3723 static int 3724 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3725 { 3726 mdb_zfs_rrwlock_t rrw; 3727 3728 if (rrw_key == 0) { 3729 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) 3730 return (DCMD_ERR); 3731 } 3732 3733 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 3734 0) == -1) 3735 return (DCMD_ERR); 3736 3737 if (rrw.rr_writer != 0) { 3738 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer); 3739 return (DCMD_OK); 3740 } 3741 3742 if (rrw.rr_writer_wanted) { 3743 mdb_printf("writer wanted\n"); 3744 } 3745 3746 mdb_printf("anonymous references:\n"); 3747 (void) mdb_call_dcmd("refcount", addr + 3748 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), 3749 DCMD_ADDRSPEC, 0, NULL); 3750 3751 mdb_printf("linked references:\n"); 3752 (void) mdb_call_dcmd("refcount", addr + 3753 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), 3754 DCMD_ADDRSPEC, 0, NULL); 3755 3756 /* 3757 * XXX This should find references from 3758 * "::walk thread | ::tsd -v <rrw_key>", but there is no support 3759 * for programmatic consumption of dcmds, so this would be 3760 * difficult, potentially requiring reimplementing ::tsd (both 3761 * user and kernel versions) in this MDB module. 3762 */ 3763 3764 return (DCMD_OK); 3765 } 3766 3767 typedef struct mdb_arc_buf_hdr_t { 3768 uint16_t b_psize; 3769 uint16_t b_lsize; 3770 struct { 3771 uint32_t b_bufcnt; 3772 uintptr_t b_state; 3773 } b_l1hdr; 3774 } mdb_arc_buf_hdr_t; 3775 3776 enum arc_cflags { 3777 ARC_CFLAG_VERBOSE = 1 << 0, 3778 ARC_CFLAG_ANON = 1 << 1, 3779 ARC_CFLAG_MRU = 1 << 2, 3780 ARC_CFLAG_MFU = 1 << 3, 3781 ARC_CFLAG_BUFS = 1 << 4, 3782 }; 3783 3784 typedef struct arc_compression_stats_data { 3785 GElf_Sym anon_sym; /* ARC_anon symbol */ 3786 GElf_Sym mru_sym; /* ARC_mru symbol */ 3787 GElf_Sym mrug_sym; /* ARC_mru_ghost symbol */ 3788 GElf_Sym mfu_sym; /* ARC_mfu symbol */ 3789 GElf_Sym mfug_sym; /* ARC_mfu_ghost symbol */ 3790 GElf_Sym l2c_sym; /* ARC_l2c_only symbol */ 3791 uint64_t *anon_c_hist; /* histogram of compressed sizes in anon */ 3792 uint64_t *anon_u_hist; /* histogram of uncompressed sizes in anon */ 3793 uint64_t *anon_bufs; /* histogram of buffer counts in anon state */ 3794 uint64_t *mru_c_hist; /* histogram of compressed sizes in mru */ 3795 uint64_t *mru_u_hist; /* histogram of uncompressed sizes in mru */ 3796 uint64_t *mru_bufs; /* histogram of buffer counts in mru */ 3797 uint64_t *mfu_c_hist; /* histogram of compressed sizes in mfu */ 3798 uint64_t *mfu_u_hist; /* histogram of uncompressed sizes in mfu */ 3799 uint64_t *mfu_bufs; /* histogram of buffer counts in mfu */ 3800 uint64_t *all_c_hist; /* histogram of compressed anon + mru + mfu */ 3801 uint64_t *all_u_hist; /* histogram of uncompressed anon + mru + mfu */ 3802 uint64_t *all_bufs; /* histogram of buffer counts in all states */ 3803 int arc_cflags; /* arc compression flags, specified by user */ 3804 int hist_nbuckets; /* number of buckets in each histogram */ 3805 } arc_compression_stats_data_t; 3806 3807 int 3808 highbit64(uint64_t i) 3809 { 3810 int h = 1; 3811 3812 if (i == 0) 3813 return (0); 3814 if (i & 0xffffffff00000000ULL) { 3815 h += 32; i >>= 32; 3816 } 3817 if (i & 0xffff0000) { 3818 h += 16; i >>= 16; 3819 } 3820 if (i & 0xff00) { 3821 h += 8; i >>= 8; 3822 } 3823 if (i & 0xf0) { 3824 h += 4; i >>= 4; 3825 } 3826 if (i & 0xc) { 3827 h += 2; i >>= 2; 3828 } 3829 if (i & 0x2) { 3830 h += 1; 3831 } 3832 return (h); 3833 } 3834 3835 /* ARGSUSED */ 3836 static int 3837 arc_compression_stats_cb(uintptr_t addr, const void *unknown, void *arg) 3838 { 3839 arc_compression_stats_data_t *data = arg; 3840 mdb_arc_buf_hdr_t hdr; 3841 int cbucket, ubucket, bufcnt; 3842 3843 if (mdb_ctf_vread(&hdr, "arc_buf_hdr_t", "mdb_arc_buf_hdr_t", 3844 addr, 0) == -1) { 3845 return (WALK_ERR); 3846 } 3847 3848 /* 3849 * Headers in the ghost states, or the l2c_only state don't have 3850 * arc buffers linked off of them. Thus, their compressed size 3851 * is meaningless, so we skip these from the stats. 3852 */ 3853 if (hdr.b_l1hdr.b_state == data->mrug_sym.st_value || 3854 hdr.b_l1hdr.b_state == data->mfug_sym.st_value || 3855 hdr.b_l1hdr.b_state == data->l2c_sym.st_value) { 3856 return (WALK_NEXT); 3857 } 3858 3859 /* 3860 * The physical size (compressed) and logical size 3861 * (uncompressed) are in units of SPA_MINBLOCKSIZE. By default, 3862 * we use the log2 of this value (rounded down to the nearest 3863 * integer) to determine the bucket to assign this header to. 3864 * Thus, the histogram is logarithmic with respect to the size 3865 * of the header. For example, the following is a mapping of the 3866 * bucket numbers and the range of header sizes they correspond to: 3867 * 3868 * 0: 0 byte headers 3869 * 1: 512 byte headers 3870 * 2: [1024 - 2048) byte headers 3871 * 3: [2048 - 4096) byte headers 3872 * 4: [4096 - 8192) byte headers 3873 * 5: [8192 - 16394) byte headers 3874 * 6: [16384 - 32768) byte headers 3875 * 7: [32768 - 65536) byte headers 3876 * 8: [65536 - 131072) byte headers 3877 * 9: 131072 byte headers 3878 * 3879 * If the ARC_CFLAG_VERBOSE flag was specified, we use the 3880 * physical and logical sizes directly. Thus, the histogram will 3881 * no longer be logarithmic; instead it will be linear with 3882 * respect to the size of the header. The following is a mapping 3883 * of the first many bucket numbers and the header size they 3884 * correspond to: 3885 * 3886 * 0: 0 byte headers 3887 * 1: 512 byte headers 3888 * 2: 1024 byte headers 3889 * 3: 1536 byte headers 3890 * 4: 2048 byte headers 3891 * 5: 2560 byte headers 3892 * 6: 3072 byte headers 3893 * 3894 * And so on. Keep in mind that a range of sizes isn't used in 3895 * the case of linear scale because the headers can only 3896 * increment or decrement in sizes of 512 bytes. So, it's not 3897 * possible for a header to be sized in between whats listed 3898 * above. 3899 * 3900 * Also, the above mapping values were calculated assuming a 3901 * SPA_MINBLOCKSHIFT of 512 bytes and a SPA_MAXBLOCKSIZE of 128K. 3902 */ 3903 3904 if (data->arc_cflags & ARC_CFLAG_VERBOSE) { 3905 cbucket = hdr.b_psize; 3906 ubucket = hdr.b_lsize; 3907 } else { 3908 cbucket = highbit64(hdr.b_psize); 3909 ubucket = highbit64(hdr.b_lsize); 3910 } 3911 3912 bufcnt = hdr.b_l1hdr.b_bufcnt; 3913 if (bufcnt >= data->hist_nbuckets) 3914 bufcnt = data->hist_nbuckets - 1; 3915 3916 /* Ensure we stay within the bounds of the histogram array */ 3917 ASSERT3U(cbucket, <, data->hist_nbuckets); 3918 ASSERT3U(ubucket, <, data->hist_nbuckets); 3919 3920 if (hdr.b_l1hdr.b_state == data->anon_sym.st_value) { 3921 data->anon_c_hist[cbucket]++; 3922 data->anon_u_hist[ubucket]++; 3923 data->anon_bufs[bufcnt]++; 3924 } else if (hdr.b_l1hdr.b_state == data->mru_sym.st_value) { 3925 data->mru_c_hist[cbucket]++; 3926 data->mru_u_hist[ubucket]++; 3927 data->mru_bufs[bufcnt]++; 3928 } else if (hdr.b_l1hdr.b_state == data->mfu_sym.st_value) { 3929 data->mfu_c_hist[cbucket]++; 3930 data->mfu_u_hist[ubucket]++; 3931 data->mfu_bufs[bufcnt]++; 3932 } 3933 3934 data->all_c_hist[cbucket]++; 3935 data->all_u_hist[ubucket]++; 3936 data->all_bufs[bufcnt]++; 3937 3938 return (WALK_NEXT); 3939 } 3940 3941 /* ARGSUSED */ 3942 static int 3943 arc_compression_stats(uintptr_t addr, uint_t flags, int argc, 3944 const mdb_arg_t *argv) 3945 { 3946 arc_compression_stats_data_t data = { 0 }; 3947 unsigned int max_shifted = SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; 3948 unsigned int hist_size; 3949 char range[32]; 3950 int rc = DCMD_OK; 3951 3952 if (mdb_getopts(argc, argv, 3953 'v', MDB_OPT_SETBITS, ARC_CFLAG_VERBOSE, &data.arc_cflags, 3954 'a', MDB_OPT_SETBITS, ARC_CFLAG_ANON, &data.arc_cflags, 3955 'b', MDB_OPT_SETBITS, ARC_CFLAG_BUFS, &data.arc_cflags, 3956 'r', MDB_OPT_SETBITS, ARC_CFLAG_MRU, &data.arc_cflags, 3957 'f', MDB_OPT_SETBITS, ARC_CFLAG_MFU, &data.arc_cflags) != argc) 3958 return (DCMD_USAGE); 3959 3960 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_anon", &data.anon_sym) || 3961 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru", &data.mru_sym) || 3962 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru_ghost", &data.mrug_sym) || 3963 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu", &data.mfu_sym) || 3964 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu_ghost", &data.mfug_sym) || 3965 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_l2c_only", &data.l2c_sym)) { 3966 mdb_warn("can't find arc state symbol"); 3967 return (DCMD_ERR); 3968 } 3969 3970 /* 3971 * Determine the maximum expected size for any header, and use 3972 * this to determine the number of buckets needed for each 3973 * histogram. If ARC_CFLAG_VERBOSE is specified, this value is 3974 * used directly; otherwise the log2 of the maximum size is 3975 * used. Thus, if using a log2 scale there's a maximum of 10 3976 * possible buckets, while the linear scale (when using 3977 * ARC_CFLAG_VERBOSE) has a maximum of 257 buckets. 3978 */ 3979 if (data.arc_cflags & ARC_CFLAG_VERBOSE) 3980 data.hist_nbuckets = max_shifted + 1; 3981 else 3982 data.hist_nbuckets = highbit64(max_shifted) + 1; 3983 3984 hist_size = sizeof (uint64_t) * data.hist_nbuckets; 3985 3986 data.anon_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 3987 data.anon_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 3988 data.anon_bufs = mdb_zalloc(hist_size, UM_SLEEP); 3989 3990 data.mru_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 3991 data.mru_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 3992 data.mru_bufs = mdb_zalloc(hist_size, UM_SLEEP); 3993 3994 data.mfu_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 3995 data.mfu_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 3996 data.mfu_bufs = mdb_zalloc(hist_size, UM_SLEEP); 3997 3998 data.all_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 3999 data.all_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4000 data.all_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4001 4002 if (mdb_walk("arc_buf_hdr_t_full", arc_compression_stats_cb, 4003 &data) != 0) { 4004 mdb_warn("can't walk arc_buf_hdr's"); 4005 rc = DCMD_ERR; 4006 goto out; 4007 } 4008 4009 if (data.arc_cflags & ARC_CFLAG_VERBOSE) { 4010 rc = mdb_snprintf(range, sizeof (range), 4011 "[n*%llu, (n+1)*%llu)", SPA_MINBLOCKSIZE, 4012 SPA_MINBLOCKSIZE); 4013 } else { 4014 rc = mdb_snprintf(range, sizeof (range), 4015 "[2^(n-1)*%llu, 2^n*%llu)", SPA_MINBLOCKSIZE, 4016 SPA_MINBLOCKSIZE); 4017 } 4018 4019 if (rc < 0) { 4020 /* snprintf failed, abort the dcmd */ 4021 rc = DCMD_ERR; 4022 goto out; 4023 } else { 4024 /* snprintf succeeded above, reset return code */ 4025 rc = DCMD_OK; 4026 } 4027 4028 if (data.arc_cflags & ARC_CFLAG_ANON) { 4029 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4030 mdb_printf("Histogram of the number of anon buffers " 4031 "that are associated with an arc hdr.\n"); 4032 dump_histogram(data.anon_bufs, data.hist_nbuckets, 0); 4033 mdb_printf("\n"); 4034 } 4035 mdb_printf("Histogram of compressed anon buffers.\n" 4036 "Each bucket represents buffers of size: %s.\n", range); 4037 dump_histogram(data.anon_c_hist, data.hist_nbuckets, 0); 4038 mdb_printf("\n"); 4039 4040 mdb_printf("Histogram of uncompressed anon buffers.\n" 4041 "Each bucket represents buffers of size: %s.\n", range); 4042 dump_histogram(data.anon_u_hist, data.hist_nbuckets, 0); 4043 mdb_printf("\n"); 4044 } 4045 4046 if (data.arc_cflags & ARC_CFLAG_MRU) { 4047 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4048 mdb_printf("Histogram of the number of mru buffers " 4049 "that are associated with an arc hdr.\n"); 4050 dump_histogram(data.mru_bufs, data.hist_nbuckets, 0); 4051 mdb_printf("\n"); 4052 } 4053 mdb_printf("Histogram of compressed mru buffers.\n" 4054 "Each bucket represents buffers of size: %s.\n", range); 4055 dump_histogram(data.mru_c_hist, data.hist_nbuckets, 0); 4056 mdb_printf("\n"); 4057 4058 mdb_printf("Histogram of uncompressed mru buffers.\n" 4059 "Each bucket represents buffers of size: %s.\n", range); 4060 dump_histogram(data.mru_u_hist, data.hist_nbuckets, 0); 4061 mdb_printf("\n"); 4062 } 4063 4064 if (data.arc_cflags & ARC_CFLAG_MFU) { 4065 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4066 mdb_printf("Histogram of the number of mfu buffers " 4067 "that are associated with an arc hdr.\n"); 4068 dump_histogram(data.mfu_bufs, data.hist_nbuckets, 0); 4069 mdb_printf("\n"); 4070 } 4071 4072 mdb_printf("Histogram of compressed mfu buffers.\n" 4073 "Each bucket represents buffers of size: %s.\n", range); 4074 dump_histogram(data.mfu_c_hist, data.hist_nbuckets, 0); 4075 mdb_printf("\n"); 4076 4077 mdb_printf("Histogram of uncompressed mfu buffers.\n" 4078 "Each bucket represents buffers of size: %s.\n", range); 4079 dump_histogram(data.mfu_u_hist, data.hist_nbuckets, 0); 4080 mdb_printf("\n"); 4081 } 4082 4083 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4084 mdb_printf("Histogram of all buffers that " 4085 "are associated with an arc hdr.\n"); 4086 dump_histogram(data.all_bufs, data.hist_nbuckets, 0); 4087 mdb_printf("\n"); 4088 } 4089 4090 mdb_printf("Histogram of all compressed buffers.\n" 4091 "Each bucket represents buffers of size: %s.\n", range); 4092 dump_histogram(data.all_c_hist, data.hist_nbuckets, 0); 4093 mdb_printf("\n"); 4094 4095 mdb_printf("Histogram of all uncompressed buffers.\n" 4096 "Each bucket represents buffers of size: %s.\n", range); 4097 dump_histogram(data.all_u_hist, data.hist_nbuckets, 0); 4098 4099 out: 4100 mdb_free(data.anon_c_hist, hist_size); 4101 mdb_free(data.anon_u_hist, hist_size); 4102 mdb_free(data.anon_bufs, hist_size); 4103 4104 mdb_free(data.mru_c_hist, hist_size); 4105 mdb_free(data.mru_u_hist, hist_size); 4106 mdb_free(data.mru_bufs, hist_size); 4107 4108 mdb_free(data.mfu_c_hist, hist_size); 4109 mdb_free(data.mfu_u_hist, hist_size); 4110 mdb_free(data.mfu_bufs, hist_size); 4111 4112 mdb_free(data.all_c_hist, hist_size); 4113 mdb_free(data.all_u_hist, hist_size); 4114 mdb_free(data.all_bufs, hist_size); 4115 4116 return (rc); 4117 } 4118 4119 /* 4120 * MDB module linkage information: 4121 * 4122 * We declare a list of structures describing our dcmds, and a function 4123 * named _mdb_init to return a pointer to our module information. 4124 */ 4125 4126 static const mdb_dcmd_t dcmds[] = { 4127 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 4128 { "blkptr", ":", "print blkptr_t", blkptr }, 4129 { "dva", ":", "print dva_t", dva }, 4130 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 4131 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 4132 { "dbufs", 4133 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 4134 "[-o object | \"mdn\"] \n" 4135 "\t[-l level] [-b blkid | \"bonus\"]", 4136 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 4137 { "abuf_find", "dva_word[0] dva_word[1]", 4138 "find arc_buf_hdr_t of a specified DVA", 4139 abuf_find }, 4140 { "spa", "?[-cevmMh]\n" 4141 "\t-c display spa config\n" 4142 "\t-e display vdev statistics\n" 4143 "\t-v display vdev information\n" 4144 "\t-m display metaslab statistics\n" 4145 "\t-M display metaslab group statistics\n" 4146 "\t-h display histogram (requires -m or -M)\n", 4147 "spa_t summary", spa_print }, 4148 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 4149 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 4150 { "spa_vdevs", ":[-emMh]\n" 4151 "\t-e display vdev statistics\n" 4152 "\t-m dispaly metaslab statistics\n" 4153 "\t-M display metaslab group statistic\n" 4154 "\t-h display histogram (requires -m or -M)\n", 4155 "given a spa_t, print vdev summary", spa_vdevs }, 4156 { "sm_entries", "<buffer length in bytes>", 4157 "print out space map entries from a buffer decoded", 4158 sm_entries}, 4159 { "vdev", ":[-remMh]\n" 4160 "\t-r display recursively\n" 4161 "\t-e display statistics\n" 4162 "\t-m display metaslab statistics (top level vdev only)\n" 4163 "\t-M display metaslab group statistics (top level vdev only)\n" 4164 "\t-h display histogram (requires -m or -M)\n", 4165 "vdev_t summary", vdev_print }, 4166 { "zio", ":[-cpr]\n" 4167 "\t-c display children\n" 4168 "\t-p display parents\n" 4169 "\t-r display recursively", 4170 "zio_t summary", zio_print }, 4171 { "zio_state", "?", "print out all zio_t structures on system or " 4172 "for a particular pool", zio_state }, 4173 { "zfs_blkstats", ":[-v]", 4174 "given a spa_t, print block type stats from last scrub", 4175 zfs_blkstats }, 4176 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 4177 { "refcount", ":[-r]\n" 4178 "\t-r display recently removed references", 4179 "print refcount_t holders", refcount }, 4180 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 4181 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 4182 zfs_acl_dump }, 4183 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 4184 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 4185 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 4186 sa_attr_table}, 4187 { "sa_attr", ": attr_id", 4188 "print SA attribute address when given sa_handle_t", sa_attr_print}, 4189 { "zfs_dbgmsg", ":[-va]", 4190 "print zfs debug log", dbgmsg}, 4191 { "rrwlock", ":", 4192 "print rrwlock_t, including readers", rrwlock}, 4193 { "metaslab_weight", "weight", 4194 "print metaslab weight", metaslab_weight}, 4195 { "metaslab_trace", ":", 4196 "print metaslab allocation trace records", metaslab_trace}, 4197 { "arc_compression_stats", ":[-vabrf]\n" 4198 "\t-v verbose, display a linearly scaled histogram\n" 4199 "\t-a display ARC_anon state statistics individually\n" 4200 "\t-r display ARC_mru state statistics individually\n" 4201 "\t-f display ARC_mfu state statistics individually\n" 4202 "\t-b display histogram of buffer counts\n", 4203 "print a histogram of compressed arc buffer sizes", 4204 arc_compression_stats}, 4205 { NULL } 4206 }; 4207 4208 static const mdb_walker_t walkers[] = { 4209 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 4210 txg_list_walk_init, txg_list_walk_step, NULL }, 4211 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 4212 txg_list0_walk_init, txg_list_walk_step, NULL }, 4213 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 4214 txg_list1_walk_init, txg_list_walk_step, NULL }, 4215 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 4216 txg_list2_walk_init, txg_list_walk_step, NULL }, 4217 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 4218 txg_list3_walk_init, txg_list_walk_step, NULL }, 4219 { "zio", "walk all zio structures, optionally for a particular spa_t", 4220 zio_walk_init, zio_walk_step, NULL }, 4221 { "zio_root", 4222 "walk all root zio_t structures, optionally for a particular spa_t", 4223 zio_walk_init, zio_walk_root_step, NULL }, 4224 { "spa", "walk all spa_t entries in the namespace", 4225 spa_walk_init, spa_walk_step, NULL }, 4226 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 4227 metaslab_walk_init, metaslab_walk_step, NULL }, 4228 { "multilist", "given a multilist_t *, walk all list_t structures", 4229 multilist_walk_init, multilist_walk_step, NULL }, 4230 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 4231 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 4232 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 4233 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 4234 { "zfs_acl_node_aces0", 4235 "given a zfs_acl_node_t, walk all ACEs as ace_t", 4236 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 4237 { NULL } 4238 }; 4239 4240 static const mdb_modinfo_t modinfo = { 4241 MDB_API_VERSION, dcmds, walkers 4242 }; 4243 4244 const mdb_modinfo_t * 4245 _mdb_init(void) 4246 { 4247 return (&modinfo); 4248 } 4249