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 2020 Joyent, Inc. 26 */ 27 28 /* Portions Copyright 2010 Robert Milkowski */ 29 30 /* 31 * ZFS_MDB lets dmu.h know that we don't have dmu_ot, and we will define our 32 * own macros to access the target's dmu_ot. Therefore it must be defined 33 * before including any ZFS headers. Note that we don't define 34 * DMU_OT_IS_ENCRYPTED_IMPL() or DMU_OT_BYTESWAP_IMPL(), therefore using them 35 * will result in a compilation error. If they are needed in the future, we 36 * can implement them similarly to mdb_dmu_ot_is_encrypted_impl(). 37 */ 38 #define ZFS_MDB 39 #define DMU_OT_IS_ENCRYPTED_IMPL(ot) mdb_dmu_ot_is_encrypted_impl(ot) 40 41 #include <mdb/mdb_ctf.h> 42 #include <sys/zfs_context.h> 43 #include <sys/mdb_modapi.h> 44 #include <sys/dbuf.h> 45 #include <sys/dmu_objset.h> 46 #include <sys/dsl_dir.h> 47 #include <sys/dsl_pool.h> 48 #include <sys/metaslab_impl.h> 49 #include <sys/space_map.h> 50 #include <sys/list.h> 51 #include <sys/vdev_impl.h> 52 #include <sys/zap_leaf.h> 53 #include <sys/zap_impl.h> 54 #include <ctype.h> 55 #include <sys/zfs_acl.h> 56 #include <sys/sa_impl.h> 57 #include <sys/multilist.h> 58 #include <sys/btree.h> 59 60 #ifdef _KERNEL 61 #define ZFS_OBJ_NAME "zfs" 62 extern int64_t mdb_gethrtime(void); 63 #else 64 #define ZFS_OBJ_NAME "libzpool.so.1" 65 #endif 66 67 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`" 68 69 #ifndef _KERNEL 70 int aok; 71 #endif 72 73 enum spa_flags { 74 SPA_FLAG_CONFIG = 1 << 0, 75 SPA_FLAG_VDEVS = 1 << 1, 76 SPA_FLAG_ERRORS = 1 << 2, 77 SPA_FLAG_METASLAB_GROUPS = 1 << 3, 78 SPA_FLAG_METASLABS = 1 << 4, 79 SPA_FLAG_HISTOGRAMS = 1 << 5 80 }; 81 82 /* 83 * If any of these flags are set, call spa_vdevs in spa_print 84 */ 85 #define SPA_FLAG_ALL_VDEV \ 86 (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \ 87 SPA_FLAG_METASLABS) 88 89 static int 90 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 91 const char *member, int len, void *buf) 92 { 93 mdb_ctf_id_t id; 94 ulong_t off; 95 char name[64]; 96 97 if (idp == NULL) { 98 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 99 mdb_warn("couldn't find type %s", type); 100 return (DCMD_ERR); 101 } 102 idp = &id; 103 } else { 104 type = name; 105 mdb_ctf_type_name(*idp, name, sizeof (name)); 106 } 107 108 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 109 mdb_warn("couldn't find member %s of type %s\n", member, type); 110 return (DCMD_ERR); 111 } 112 if (off % 8 != 0) { 113 mdb_warn("member %s of type %s is unsupported bitfield", 114 member, type); 115 return (DCMD_ERR); 116 } 117 off /= 8; 118 119 if (mdb_vread(buf, len, addr + off) == -1) { 120 mdb_warn("failed to read %s from %s at %p", 121 member, type, addr + off); 122 return (DCMD_ERR); 123 } 124 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 125 126 return (0); 127 } 128 129 #define GETMEMB(addr, structname, member, dest) \ 130 getmember(addr, ZFS_STRUCT structname, NULL, #member, \ 131 sizeof (dest), &(dest)) 132 133 #define GETMEMBID(addr, ctfid, member, dest) \ 134 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 135 136 static boolean_t 137 strisprint(const char *cp) 138 { 139 for (; *cp; cp++) { 140 if (!isprint(*cp)) 141 return (B_FALSE); 142 } 143 return (B_TRUE); 144 } 145 146 /* 147 * <addr>::sm_entries <buffer length in bytes> 148 * 149 * Treat the buffer specified by the given address as a buffer that contains 150 * space map entries. Iterate over the specified number of entries and print 151 * them in both encoded and decoded form. 152 */ 153 /* ARGSUSED */ 154 static int 155 sm_entries(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 156 { 157 uint64_t bufsz = 0; 158 boolean_t preview = B_FALSE; 159 160 if (!(flags & DCMD_ADDRSPEC)) 161 return (DCMD_USAGE); 162 163 if (argc < 1) { 164 preview = B_TRUE; 165 bufsz = 2; 166 } else if (argc != 1) { 167 return (DCMD_USAGE); 168 } else { 169 switch (argv[0].a_type) { 170 case MDB_TYPE_STRING: 171 bufsz = mdb_strtoull(argv[0].a_un.a_str); 172 break; 173 case MDB_TYPE_IMMEDIATE: 174 bufsz = argv[0].a_un.a_val; 175 break; 176 default: 177 return (DCMD_USAGE); 178 } 179 } 180 181 char *actions[] = { "ALLOC", "FREE", "INVALID" }; 182 for (uintptr_t bufend = addr + bufsz; addr < bufend; 183 addr += sizeof (uint64_t)) { 184 uint64_t nwords; 185 uint64_t start_addr = addr; 186 187 uint64_t word = 0; 188 if (mdb_vread(&word, sizeof (word), addr) == -1) { 189 mdb_warn("failed to read space map entry %p", addr); 190 return (DCMD_ERR); 191 } 192 193 if (SM_PREFIX_DECODE(word) == SM_DEBUG_PREFIX) { 194 (void) mdb_printf("\t [%6llu] %s: txg %llu, " 195 "pass %llu\n", 196 (u_longlong_t)(addr), 197 actions[SM_DEBUG_ACTION_DECODE(word)], 198 (u_longlong_t)SM_DEBUG_TXG_DECODE(word), 199 (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word)); 200 continue; 201 } 202 203 char entry_type; 204 uint64_t raw_offset, raw_run, vdev_id = SM_NO_VDEVID; 205 206 if (SM_PREFIX_DECODE(word) != SM2_PREFIX) { 207 entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ? 208 'A' : 'F'; 209 raw_offset = SM_OFFSET_DECODE(word); 210 raw_run = SM_RUN_DECODE(word); 211 nwords = 1; 212 } else { 213 ASSERT3U(SM_PREFIX_DECODE(word), ==, SM2_PREFIX); 214 215 raw_run = SM2_RUN_DECODE(word); 216 vdev_id = SM2_VDEV_DECODE(word); 217 218 /* it is a two-word entry so we read another word */ 219 addr += sizeof (uint64_t); 220 if (addr >= bufend) { 221 mdb_warn("buffer ends in the middle of a two " 222 "word entry\n", addr); 223 return (DCMD_ERR); 224 } 225 226 if (mdb_vread(&word, sizeof (word), addr) == -1) { 227 mdb_warn("failed to read space map entry %p", 228 addr); 229 return (DCMD_ERR); 230 } 231 232 entry_type = (SM2_TYPE_DECODE(word) == SM_ALLOC) ? 233 'A' : 'F'; 234 raw_offset = SM2_OFFSET_DECODE(word); 235 nwords = 2; 236 } 237 238 (void) mdb_printf("\t [%6llx] %c range:" 239 " %010llx-%010llx size: %06llx vdev: %06llu words: %llu\n", 240 (u_longlong_t)start_addr, 241 entry_type, (u_longlong_t)raw_offset, 242 (u_longlong_t)(raw_offset + raw_run), 243 (u_longlong_t)raw_run, 244 (u_longlong_t)vdev_id, (u_longlong_t)nwords); 245 246 if (preview) 247 break; 248 } 249 return (DCMD_OK); 250 } 251 252 static int 253 mdb_dsl_dir_name(uintptr_t addr, char *buf) 254 { 255 static int gotid; 256 static mdb_ctf_id_t dd_id; 257 uintptr_t dd_parent; 258 char dd_myname[ZFS_MAX_DATASET_NAME_LEN]; 259 260 if (!gotid) { 261 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir", 262 &dd_id) == -1) { 263 mdb_warn("couldn't find struct dsl_dir"); 264 return (DCMD_ERR); 265 } 266 gotid = TRUE; 267 } 268 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 269 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 270 return (DCMD_ERR); 271 } 272 273 if (dd_parent) { 274 if (mdb_dsl_dir_name(dd_parent, buf)) 275 return (DCMD_ERR); 276 strcat(buf, "/"); 277 } 278 279 if (dd_myname[0]) 280 strcat(buf, dd_myname); 281 else 282 strcat(buf, "???"); 283 284 return (0); 285 } 286 287 static int 288 objset_name(uintptr_t addr, char *buf) 289 { 290 static int gotid; 291 static mdb_ctf_id_t os_id, ds_id; 292 uintptr_t os_dsl_dataset; 293 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN]; 294 uintptr_t ds_dir; 295 296 buf[0] = '\0'; 297 298 if (!gotid) { 299 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset", 300 &os_id) == -1) { 301 mdb_warn("couldn't find struct objset"); 302 return (DCMD_ERR); 303 } 304 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset", 305 &ds_id) == -1) { 306 mdb_warn("couldn't find struct dsl_dataset"); 307 return (DCMD_ERR); 308 } 309 310 gotid = TRUE; 311 } 312 313 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset)) 314 return (DCMD_ERR); 315 316 if (os_dsl_dataset == 0) { 317 strcat(buf, "mos"); 318 return (0); 319 } 320 321 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 322 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 323 return (DCMD_ERR); 324 } 325 326 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf)) 327 return (DCMD_ERR); 328 329 if (ds_snapname[0]) { 330 strcat(buf, "@"); 331 strcat(buf, ds_snapname); 332 } 333 return (0); 334 } 335 336 static int 337 enum_lookup(char *type, int val, const char *prefix, size_t size, char *out) 338 { 339 const char *cp; 340 size_t len = strlen(prefix); 341 mdb_ctf_id_t enum_type; 342 343 if (mdb_ctf_lookup_by_name(type, &enum_type) != 0) { 344 mdb_warn("Could not find enum for %s", type); 345 return (-1); 346 } 347 348 if ((cp = mdb_ctf_enum_name(enum_type, val)) != NULL) { 349 if (strncmp(cp, prefix, len) == 0) 350 cp += len; 351 (void) strncpy(out, cp, size); 352 } else { 353 mdb_snprintf(out, size, "? (%d)", val); 354 } 355 return (0); 356 } 357 358 /* ARGSUSED */ 359 static int 360 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 361 { 362 /* 363 * This table can be approximately generated by running: 364 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 365 */ 366 static const char *params[] = { 367 "arc_lotsfree_percent", 368 "arc_pages_pp_reserve", 369 "arc_reduce_dnlc_percent", 370 "arc_swapfs_reserve", 371 "arc_zio_arena_free_shift", 372 "dbuf_cache_hiwater_pct", 373 "dbuf_cache_lowater_pct", 374 "dbuf_cache_max_bytes", 375 "dbuf_cache_max_shift", 376 "ddt_zap_indirect_blockshift", 377 "ddt_zap_leaf_blockshift", 378 "ditto_same_vdev_distance_shift", 379 "dmu_find_threads", 380 "dmu_rescan_dnode_threshold", 381 "dsl_scan_delay_completion", 382 "fzap_default_block_shift", 383 "l2arc_feed_again", 384 "l2arc_feed_min_ms", 385 "l2arc_feed_secs", 386 "l2arc_headroom", 387 "l2arc_headroom_boost", 388 "l2arc_noprefetch", 389 "l2arc_norw", 390 "l2arc_write_boost", 391 "l2arc_write_max", 392 "metaslab_aliquot", 393 "metaslab_bias_enabled", 394 "metaslab_debug_load", 395 "metaslab_debug_unload", 396 "metaslab_df_alloc_threshold", 397 "metaslab_df_free_pct", 398 "metaslab_fragmentation_factor_enabled", 399 "metaslab_force_ganging", 400 "metaslab_lba_weighting_enabled", 401 "metaslab_load_pct", 402 "metaslab_min_alloc_size", 403 "metaslab_ndf_clump_shift", 404 "metaslab_preload_enabled", 405 "metaslab_preload_limit", 406 "metaslab_trace_enabled", 407 "metaslab_trace_max_entries", 408 "metaslab_unload_delay", 409 "metaslabs_per_vdev", 410 "reference_history", 411 "reference_tracking_enable", 412 "send_holes_without_birth_time", 413 "spa_asize_inflation", 414 "spa_load_verify_data", 415 "spa_load_verify_maxinflight", 416 "spa_load_verify_metadata", 417 "spa_max_replication_override", 418 "spa_min_slop", 419 "spa_mode_global", 420 "spa_slop_shift", 421 "space_map_blksz", 422 "vdev_mirror_shift", 423 "zfetch_max_distance", 424 "zfs_abd_chunk_size", 425 "zfs_abd_scatter_enabled", 426 "zfs_arc_average_blocksize", 427 "zfs_arc_evict_batch_limit", 428 "zfs_arc_grow_retry", 429 "zfs_arc_max", 430 "zfs_arc_meta_limit", 431 "zfs_arc_meta_min", 432 "zfs_arc_min", 433 "zfs_arc_p_min_shift", 434 "zfs_arc_shrink_shift", 435 "zfs_async_block_max_blocks", 436 "zfs_ccw_retry_interval", 437 "zfs_commit_timeout_pct", 438 "zfs_compressed_arc_enabled", 439 "zfs_condense_indirect_commit_entry_delay_ticks", 440 "zfs_condense_indirect_vdevs_enable", 441 "zfs_condense_max_obsolete_bytes", 442 "zfs_condense_min_mapping_bytes", 443 "zfs_condense_pct", 444 "zfs_dbgmsg_maxsize", 445 "zfs_deadman_checktime_ms", 446 "zfs_deadman_enabled", 447 "zfs_deadman_synctime_ms", 448 "zfs_dedup_prefetch", 449 "zfs_default_bs", 450 "zfs_default_ibs", 451 "zfs_delay_max_ns", 452 "zfs_delay_min_dirty_percent", 453 "zfs_delay_resolution_ns", 454 "zfs_delay_scale", 455 "zfs_dirty_data_max", 456 "zfs_dirty_data_max_max", 457 "zfs_dirty_data_max_percent", 458 "zfs_dirty_data_sync", 459 "zfs_flags", 460 "zfs_free_bpobj_enabled", 461 "zfs_free_leak_on_eio", 462 "zfs_free_min_time_ms", 463 "zfs_fsync_sync_cnt", 464 "zfs_immediate_write_sz", 465 "zfs_indirect_condense_obsolete_pct", 466 "zfs_lua_check_instrlimit_interval", 467 "zfs_lua_max_instrlimit", 468 "zfs_lua_max_memlimit", 469 "zfs_max_recordsize", 470 "zfs_mdcomp_disable", 471 "zfs_metaslab_condense_block_threshold", 472 "zfs_metaslab_fragmentation_threshold", 473 "zfs_metaslab_segment_weight_enabled", 474 "zfs_metaslab_switch_threshold", 475 "zfs_mg_fragmentation_threshold", 476 "zfs_mg_noalloc_threshold", 477 "zfs_multilist_num_sublists", 478 "zfs_no_scrub_io", 479 "zfs_no_scrub_prefetch", 480 "zfs_nocacheflush", 481 "zfs_nopwrite_enabled", 482 "zfs_object_remap_one_indirect_delay_ticks", 483 "zfs_obsolete_min_time_ms", 484 "zfs_pd_bytes_max", 485 "zfs_per_txg_dirty_frees_percent", 486 "zfs_prefetch_disable", 487 "zfs_read_chunk_size", 488 "zfs_recover", 489 "zfs_recv_queue_length", 490 "zfs_redundant_metadata_most_ditto_level", 491 "zfs_remap_blkptr_enable", 492 "zfs_remove_max_copy_bytes", 493 "zfs_remove_max_segment", 494 "zfs_resilver_delay", 495 "zfs_resilver_min_time_ms", 496 "zfs_scan_idle", 497 "zfs_scan_min_time_ms", 498 "zfs_scrub_delay", 499 "zfs_scrub_limit", 500 "zfs_send_corrupt_data", 501 "zfs_send_queue_length", 502 "zfs_send_set_freerecords_bit", 503 "zfs_sync_pass_deferred_free", 504 "zfs_sync_pass_dont_compress", 505 "zfs_sync_pass_rewrite", 506 "zfs_sync_taskq_batch_pct", 507 "zfs_top_maxinflight", 508 "zfs_txg_timeout", 509 "zfs_vdev_aggregation_limit", 510 "zfs_vdev_async_read_max_active", 511 "zfs_vdev_async_read_min_active", 512 "zfs_vdev_async_write_active_max_dirty_percent", 513 "zfs_vdev_async_write_active_min_dirty_percent", 514 "zfs_vdev_async_write_max_active", 515 "zfs_vdev_async_write_min_active", 516 "zfs_vdev_cache_bshift", 517 "zfs_vdev_cache_max", 518 "zfs_vdev_cache_size", 519 "zfs_vdev_max_active", 520 "zfs_vdev_queue_depth_pct", 521 "zfs_vdev_read_gap_limit", 522 "zfs_vdev_removal_max_active", 523 "zfs_vdev_removal_min_active", 524 "zfs_vdev_scrub_max_active", 525 "zfs_vdev_scrub_min_active", 526 "zfs_vdev_sync_read_max_active", 527 "zfs_vdev_sync_read_min_active", 528 "zfs_vdev_sync_write_max_active", 529 "zfs_vdev_sync_write_min_active", 530 "zfs_vdev_write_gap_limit", 531 "zfs_write_implies_delete_child", 532 "zfs_zil_clean_taskq_maxalloc", 533 "zfs_zil_clean_taskq_minalloc", 534 "zfs_zil_clean_taskq_nthr_pct", 535 "zil_replay_disable", 536 "zil_slog_bulk", 537 "zio_buf_debug_limit", 538 "zio_dva_throttle_enabled", 539 "zio_injection_enabled", 540 "zvol_immediate_write_sz", 541 "zvol_maxphys", 542 "zvol_unmap_enabled", 543 "zvol_unmap_sync_enabled", 544 "zfs_max_dataset_nesting", 545 }; 546 547 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 548 int sz; 549 uint64_t val64; 550 uint32_t *val32p = (uint32_t *)&val64; 551 552 sz = mdb_readvar(&val64, params[i]); 553 if (sz == 4) { 554 mdb_printf("%s = 0x%x\n", params[i], *val32p); 555 } else if (sz == 8) { 556 mdb_printf("%s = 0x%llx\n", params[i], val64); 557 } else { 558 mdb_warn("variable %s not found", params[i]); 559 } 560 } 561 562 return (DCMD_OK); 563 } 564 565 /* ARGSUSED */ 566 static int 567 dva(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 568 { 569 dva_t dva; 570 if (mdb_vread(&dva, sizeof (dva_t), addr) == -1) { 571 mdb_warn("failed to read dva_t"); 572 return (DCMD_ERR); 573 } 574 mdb_printf("<%llu:%llx:%llx>\n", 575 (u_longlong_t)DVA_GET_VDEV(&dva), 576 (u_longlong_t)DVA_GET_OFFSET(&dva), 577 (u_longlong_t)DVA_GET_ASIZE(&dva)); 578 579 return (DCMD_OK); 580 } 581 582 typedef struct mdb_dmu_object_type_info { 583 boolean_t ot_encrypt; 584 } mdb_dmu_object_type_info_t; 585 586 static boolean_t 587 mdb_dmu_ot_is_encrypted_impl(dmu_object_type_t ot) 588 { 589 mdb_dmu_object_type_info_t mdoti; 590 GElf_Sym sym; 591 size_t sz = mdb_ctf_sizeof_by_name("dmu_object_type_info_t"); 592 593 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "dmu_ot", &sym)) { 594 mdb_warn("failed to find " ZFS_OBJ_NAME "`dmu_ot"); 595 return (B_FALSE); 596 } 597 598 if (mdb_ctf_vread(&mdoti, "dmu_object_type_info_t", 599 "mdb_dmu_object_type_info_t", sym.st_value + sz * ot, 0) != 0) { 600 return (B_FALSE); 601 } 602 603 return (mdoti.ot_encrypt); 604 } 605 606 /* ARGSUSED */ 607 static int 608 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 609 { 610 char type[80], checksum[80], compress[80]; 611 blkptr_t blk, *bp = &blk; 612 char buf[BP_SPRINTF_LEN]; 613 614 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { 615 mdb_warn("failed to read blkptr_t"); 616 return (DCMD_ERR); 617 } 618 619 if (enum_lookup("enum dmu_object_type", BP_GET_TYPE(bp), "DMU_OT_", 620 sizeof (type), type) == -1 || 621 enum_lookup("enum zio_checksum", BP_GET_CHECKSUM(bp), 622 "ZIO_CHECKSUM_", sizeof (checksum), checksum) == -1 || 623 enum_lookup("enum zio_compress", BP_GET_COMPRESS(bp), 624 "ZIO_COMPRESS_", sizeof (compress), compress) == -1) { 625 mdb_warn("Could not find blkptr enumerated types"); 626 return (DCMD_ERR); 627 } 628 629 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type, 630 checksum, compress); 631 632 mdb_printf("%s\n", buf); 633 634 return (DCMD_OK); 635 } 636 637 typedef struct mdb_dmu_buf_impl { 638 struct { 639 uint64_t db_object; 640 uintptr_t db_data; 641 } db; 642 uintptr_t db_objset; 643 uint64_t db_level; 644 uint64_t db_blkid; 645 struct { 646 uint64_t rc_count; 647 } db_holds; 648 } mdb_dmu_buf_impl_t; 649 650 /* ARGSUSED */ 651 static int 652 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 653 { 654 mdb_dmu_buf_impl_t db; 655 char objectname[32]; 656 char blkidname[32]; 657 char path[ZFS_MAX_DATASET_NAME_LEN]; 658 int ptr_width = (int)(sizeof (void *)) * 2; 659 660 if (DCMD_HDRSPEC(flags)) 661 mdb_printf("%*s %8s %3s %9s %5s %s\n", 662 ptr_width, "addr", "object", "lvl", "blkid", "holds", "os"); 663 664 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 665 addr, 0) == -1) 666 return (DCMD_ERR); 667 668 if (db.db.db_object == DMU_META_DNODE_OBJECT) 669 (void) strcpy(objectname, "mdn"); 670 else 671 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 672 (u_longlong_t)db.db.db_object); 673 674 if (db.db_blkid == DMU_BONUS_BLKID) 675 (void) strcpy(blkidname, "bonus"); 676 else 677 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 678 (u_longlong_t)db.db_blkid); 679 680 if (objset_name(db.db_objset, path)) { 681 return (DCMD_ERR); 682 } 683 684 mdb_printf("%*p %8s %3u %9s %5llu %s\n", ptr_width, addr, 685 objectname, (int)db.db_level, blkidname, 686 db.db_holds.rc_count, path); 687 688 return (DCMD_OK); 689 } 690 691 /* ARGSUSED */ 692 static int 693 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 694 { 695 #define HISTOSZ 32 696 uintptr_t dbp; 697 dmu_buf_impl_t db; 698 dbuf_hash_table_t ht; 699 uint64_t bucket, ndbufs; 700 uint64_t histo[HISTOSZ]; 701 uint64_t histo2[HISTOSZ]; 702 int i, maxidx; 703 704 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 705 mdb_warn("failed to read 'dbuf_hash_table'"); 706 return (DCMD_ERR); 707 } 708 709 for (i = 0; i < HISTOSZ; i++) { 710 histo[i] = 0; 711 histo2[i] = 0; 712 } 713 714 ndbufs = 0; 715 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 716 int len; 717 718 if (mdb_vread(&dbp, sizeof (void *), 719 (uintptr_t)(ht.hash_table+bucket)) == -1) { 720 mdb_warn("failed to read hash bucket %u at %p", 721 bucket, ht.hash_table+bucket); 722 return (DCMD_ERR); 723 } 724 725 len = 0; 726 while (dbp != 0) { 727 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 728 dbp) == -1) { 729 mdb_warn("failed to read dbuf at %p", dbp); 730 return (DCMD_ERR); 731 } 732 dbp = (uintptr_t)db.db_hash_next; 733 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 734 histo2[i]++; 735 len++; 736 ndbufs++; 737 } 738 739 if (len >= HISTOSZ) 740 len = HISTOSZ-1; 741 histo[len]++; 742 } 743 744 mdb_printf("hash table has %llu buckets, %llu dbufs " 745 "(avg %llu buckets/dbuf)\n", 746 ht.hash_table_mask+1, ndbufs, 747 (ht.hash_table_mask+1)/ndbufs); 748 749 mdb_printf("\n"); 750 maxidx = 0; 751 for (i = 0; i < HISTOSZ; i++) 752 if (histo[i] > 0) 753 maxidx = i; 754 mdb_printf("hash chain length number of buckets\n"); 755 for (i = 0; i <= maxidx; i++) 756 mdb_printf("%u %llu\n", i, histo[i]); 757 758 mdb_printf("\n"); 759 maxidx = 0; 760 for (i = 0; i < HISTOSZ; i++) 761 if (histo2[i] > 0) 762 maxidx = i; 763 mdb_printf("hash chain depth number of dbufs\n"); 764 for (i = 0; i <= maxidx; i++) 765 mdb_printf("%u or more %llu %llu%%\n", 766 i, histo2[i], histo2[i]*100/ndbufs); 767 768 769 return (DCMD_OK); 770 } 771 772 #define CHAIN_END 0xffff 773 /* 774 * ::zap_leaf [-v] 775 * 776 * Print a zap_leaf_phys_t, assumed to be 16k 777 */ 778 /* ARGSUSED */ 779 static int 780 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 781 { 782 char buf[16*1024]; 783 int verbose = B_FALSE; 784 int four = B_FALSE; 785 dmu_buf_t l_dbuf; 786 zap_leaf_t l; 787 zap_leaf_phys_t *zlp = (void *)buf; 788 int i; 789 790 if (mdb_getopts(argc, argv, 791 'v', MDB_OPT_SETBITS, TRUE, &verbose, 792 '4', MDB_OPT_SETBITS, TRUE, &four, 793 NULL) != argc) 794 return (DCMD_USAGE); 795 796 l_dbuf.db_data = zlp; 797 l.l_dbuf = &l_dbuf; 798 l.l_bs = 14; /* assume 16k blocks */ 799 if (four) 800 l.l_bs = 12; 801 802 if (!(flags & DCMD_ADDRSPEC)) { 803 return (DCMD_USAGE); 804 } 805 806 if (mdb_vread(buf, sizeof (buf), addr) == -1) { 807 mdb_warn("failed to read zap_leaf_phys_t at %p", addr); 808 return (DCMD_ERR); 809 } 810 811 if (zlp->l_hdr.lh_block_type != ZBT_LEAF || 812 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { 813 mdb_warn("This does not appear to be a zap_leaf_phys_t"); 814 return (DCMD_ERR); 815 } 816 817 mdb_printf("zap_leaf_phys_t at %p:\n", addr); 818 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); 819 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); 820 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); 821 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, 822 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); 823 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); 824 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, 825 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? 826 "ENTRIES_CDSORTED" : ""); 827 828 if (verbose) { 829 mdb_printf(" hash table:\n"); 830 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { 831 if (zlp->l_hash[i] != CHAIN_END) 832 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); 833 } 834 } 835 836 mdb_printf(" chunks:\n"); 837 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { 838 /* LINTED: alignment */ 839 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); 840 switch (zlc->l_entry.le_type) { 841 case ZAP_CHUNK_FREE: 842 if (verbose) { 843 mdb_printf(" %u: free; lf_next = %u\n", 844 i, zlc->l_free.lf_next); 845 } 846 break; 847 case ZAP_CHUNK_ENTRY: 848 mdb_printf(" %u: entry\n", i); 849 if (verbose) { 850 mdb_printf(" le_next = %u\n", 851 zlc->l_entry.le_next); 852 } 853 mdb_printf(" le_name_chunk = %u\n", 854 zlc->l_entry.le_name_chunk); 855 mdb_printf(" le_name_numints = %u\n", 856 zlc->l_entry.le_name_numints); 857 mdb_printf(" le_value_chunk = %u\n", 858 zlc->l_entry.le_value_chunk); 859 mdb_printf(" le_value_intlen = %u\n", 860 zlc->l_entry.le_value_intlen); 861 mdb_printf(" le_value_numints = %u\n", 862 zlc->l_entry.le_value_numints); 863 mdb_printf(" le_cd = %u\n", 864 zlc->l_entry.le_cd); 865 mdb_printf(" le_hash = %llx\n", 866 zlc->l_entry.le_hash); 867 break; 868 case ZAP_CHUNK_ARRAY: 869 mdb_printf(" %u: array", i); 870 if (strisprint((char *)zlc->l_array.la_array)) 871 mdb_printf(" \"%s\"", zlc->l_array.la_array); 872 mdb_printf("\n"); 873 if (verbose) { 874 int j; 875 mdb_printf(" "); 876 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { 877 mdb_printf("%02x ", 878 zlc->l_array.la_array[j]); 879 } 880 mdb_printf("\n"); 881 } 882 if (zlc->l_array.la_next != CHAIN_END) { 883 mdb_printf(" lf_next = %u\n", 884 zlc->l_array.la_next); 885 } 886 break; 887 default: 888 mdb_printf(" %u: undefined type %u\n", 889 zlc->l_entry.le_type); 890 } 891 } 892 893 return (DCMD_OK); 894 } 895 896 typedef struct dbufs_data { 897 mdb_ctf_id_t id; 898 uint64_t objset; 899 uint64_t object; 900 uint64_t level; 901 uint64_t blkid; 902 char *osname; 903 } dbufs_data_t; 904 905 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 906 907 /* ARGSUSED */ 908 static int 909 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 910 { 911 dbufs_data_t *data = arg; 912 uintptr_t objset; 913 dmu_buf_t db; 914 uint8_t level; 915 uint64_t blkid; 916 char osname[ZFS_MAX_DATASET_NAME_LEN]; 917 918 if (GETMEMBID(addr, &data->id, db_objset, objset) || 919 GETMEMBID(addr, &data->id, db, db) || 920 GETMEMBID(addr, &data->id, db_level, level) || 921 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 922 return (WALK_ERR); 923 } 924 925 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 926 (data->osname == NULL || (objset_name(objset, osname) == 0 && 927 strcmp(data->osname, osname) == 0)) && 928 (data->object == DBUFS_UNSET || data->object == db.db_object) && 929 (data->level == DBUFS_UNSET || data->level == level) && 930 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 931 mdb_printf("%#lr\n", addr); 932 } 933 return (WALK_NEXT); 934 } 935 936 /* ARGSUSED */ 937 static int 938 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 939 { 940 dbufs_data_t data; 941 char *object = NULL; 942 char *blkid = NULL; 943 944 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 945 data.osname = NULL; 946 947 if (mdb_getopts(argc, argv, 948 'O', MDB_OPT_UINT64, &data.objset, 949 'n', MDB_OPT_STR, &data.osname, 950 'o', MDB_OPT_STR, &object, 951 'l', MDB_OPT_UINT64, &data.level, 952 'b', MDB_OPT_STR, &blkid, 953 NULL) != argc) { 954 return (DCMD_USAGE); 955 } 956 957 if (object) { 958 if (strcmp(object, "mdn") == 0) { 959 data.object = DMU_META_DNODE_OBJECT; 960 } else { 961 data.object = mdb_strtoull(object); 962 } 963 } 964 965 if (blkid) { 966 if (strcmp(blkid, "bonus") == 0) { 967 data.blkid = DMU_BONUS_BLKID; 968 } else { 969 data.blkid = mdb_strtoull(blkid); 970 } 971 } 972 973 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) { 974 mdb_warn("couldn't find struct dmu_buf_impl_t"); 975 return (DCMD_ERR); 976 } 977 978 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 979 mdb_warn("can't walk dbufs"); 980 return (DCMD_ERR); 981 } 982 983 return (DCMD_OK); 984 } 985 986 typedef struct abuf_find_data { 987 dva_t dva; 988 mdb_ctf_id_t id; 989 } abuf_find_data_t; 990 991 /* ARGSUSED */ 992 static int 993 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 994 { 995 abuf_find_data_t *data = arg; 996 dva_t dva; 997 998 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 999 return (WALK_ERR); 1000 } 1001 1002 if (dva.dva_word[0] == data->dva.dva_word[0] && 1003 dva.dva_word[1] == data->dva.dva_word[1]) { 1004 mdb_printf("%#lr\n", addr); 1005 } 1006 return (WALK_NEXT); 1007 } 1008 1009 typedef struct mdb_arc_state { 1010 uintptr_t arcs_list[ARC_BUFC_NUMTYPES]; 1011 } mdb_arc_state_t; 1012 1013 /* ARGSUSED */ 1014 static int 1015 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1016 { 1017 abuf_find_data_t data; 1018 GElf_Sym sym; 1019 int i, j; 1020 const char *syms[] = { 1021 "ARC_mru", 1022 "ARC_mru_ghost", 1023 "ARC_mfu", 1024 "ARC_mfu_ghost", 1025 }; 1026 1027 if (argc != 2) 1028 return (DCMD_USAGE); 1029 1030 for (i = 0; i < 2; i ++) { 1031 switch (argv[i].a_type) { 1032 case MDB_TYPE_STRING: 1033 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 1034 break; 1035 case MDB_TYPE_IMMEDIATE: 1036 data.dva.dva_word[i] = argv[i].a_un.a_val; 1037 break; 1038 default: 1039 return (DCMD_USAGE); 1040 } 1041 } 1042 1043 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) { 1044 mdb_warn("couldn't find struct arc_buf_hdr"); 1045 return (DCMD_ERR); 1046 } 1047 1048 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 1049 mdb_arc_state_t mas; 1050 1051 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) { 1052 mdb_warn("can't find symbol %s", syms[i]); 1053 return (DCMD_ERR); 1054 } 1055 1056 if (mdb_ctf_vread(&mas, "arc_state_t", "mdb_arc_state_t", 1057 sym.st_value, 0) != 0) { 1058 mdb_warn("can't read arcs_list of %s", syms[i]); 1059 return (DCMD_ERR); 1060 } 1061 1062 for (j = 0; j < ARC_BUFC_NUMTYPES; j++) { 1063 uintptr_t addr = mas.arcs_list[j]; 1064 1065 if (addr == 0) 1066 continue; 1067 1068 if (mdb_pwalk("multilist", abuf_find_cb, &data, 1069 addr) != 0) { 1070 mdb_warn("can't walk %s", syms[i]); 1071 return (DCMD_ERR); 1072 } 1073 } 1074 } 1075 1076 return (DCMD_OK); 1077 } 1078 1079 1080 typedef struct dbgmsg_arg { 1081 boolean_t da_verbose; 1082 boolean_t da_address; 1083 } dbgmsg_arg_t; 1084 1085 /* ARGSUSED */ 1086 static int 1087 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 1088 { 1089 static mdb_ctf_id_t id; 1090 static boolean_t gotid; 1091 static ulong_t off; 1092 1093 dbgmsg_arg_t *da = arg; 1094 time_t timestamp; 1095 char buf[1024]; 1096 1097 if (!gotid) { 1098 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == 1099 -1) { 1100 mdb_warn("couldn't find struct zfs_dbgmsg"); 1101 return (WALK_ERR); 1102 } 1103 gotid = TRUE; 1104 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 1105 mdb_warn("couldn't find zdm_msg"); 1106 return (WALK_ERR); 1107 } 1108 off /= 8; 1109 } 1110 1111 1112 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 1113 return (WALK_ERR); 1114 } 1115 1116 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 1117 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 1118 return (DCMD_ERR); 1119 } 1120 1121 if (da->da_address) 1122 mdb_printf("%p ", addr); 1123 if (da->da_verbose) 1124 mdb_printf("%Y ", timestamp); 1125 1126 mdb_printf("%s\n", buf); 1127 1128 if (da->da_verbose) 1129 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 1130 1131 return (WALK_NEXT); 1132 } 1133 1134 /* ARGSUSED */ 1135 static int 1136 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1137 { 1138 GElf_Sym sym; 1139 dbgmsg_arg_t da = { 0 }; 1140 1141 if (mdb_getopts(argc, argv, 1142 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 1143 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, 1144 NULL) != argc) 1145 return (DCMD_USAGE); 1146 1147 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { 1148 mdb_warn("can't find zfs_dbgmsgs"); 1149 return (DCMD_ERR); 1150 } 1151 1152 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { 1153 mdb_warn("can't walk zfs_dbgmsgs"); 1154 return (DCMD_ERR); 1155 } 1156 1157 return (DCMD_OK); 1158 } 1159 1160 /*ARGSUSED*/ 1161 static int 1162 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1163 { 1164 kstat_named_t *stats; 1165 GElf_Sym sym; 1166 int nstats, i; 1167 uint_t opt_a = FALSE; 1168 uint_t opt_b = FALSE; 1169 uint_t shift = 0; 1170 const char *suffix; 1171 1172 static const char *bytestats[] = { 1173 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 1174 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 1175 "arc_meta_min", "hdr_size", "data_size", "metadata_size", 1176 "other_size", "anon_size", "anon_evictable_data", 1177 "anon_evictable_metadata", "mru_size", "mru_evictable_data", 1178 "mru_evictable_metadata", "mru_ghost_size", 1179 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata", 1180 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata", 1181 "mfu_ghost_size", "mfu_ghost_evictable_data", 1182 "mfu_ghost_evictable_metadata", "evict_l2_cached", 1183 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes", 1184 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size", 1185 "compressed_size", "uncompressed_size", "overhead_size", 1186 NULL 1187 }; 1188 1189 static const char *extras[] = { 1190 "arc_no_grow", "arc_tempreserve", 1191 NULL 1192 }; 1193 1194 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) { 1195 mdb_warn("failed to find 'arc_stats'"); 1196 return (DCMD_ERR); 1197 } 1198 1199 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 1200 1201 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 1202 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 1203 return (DCMD_ERR); 1204 } 1205 1206 nstats = sym.st_size / sizeof (kstat_named_t); 1207 1208 /* NB: -a / opt_a are ignored for backwards compatability */ 1209 if (mdb_getopts(argc, argv, 1210 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 1211 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 1212 'k', MDB_OPT_SETBITS, 10, &shift, 1213 'm', MDB_OPT_SETBITS, 20, &shift, 1214 'g', MDB_OPT_SETBITS, 30, &shift, 1215 NULL) != argc) 1216 return (DCMD_USAGE); 1217 1218 if (!opt_b && !shift) 1219 shift = 20; 1220 1221 switch (shift) { 1222 case 0: 1223 suffix = "B"; 1224 break; 1225 case 10: 1226 suffix = "KB"; 1227 break; 1228 case 20: 1229 suffix = "MB"; 1230 break; 1231 case 30: 1232 suffix = "GB"; 1233 break; 1234 default: 1235 suffix = "XX"; 1236 } 1237 1238 for (i = 0; i < nstats; i++) { 1239 int j; 1240 boolean_t bytes = B_FALSE; 1241 1242 for (j = 0; bytestats[j]; j++) { 1243 if (strcmp(stats[i].name, bytestats[j]) == 0) { 1244 bytes = B_TRUE; 1245 break; 1246 } 1247 } 1248 1249 if (bytes) { 1250 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 1251 stats[i].value.ui64 >> shift, suffix); 1252 } else { 1253 mdb_printf("%-25s = %9llu\n", stats[i].name, 1254 stats[i].value.ui64); 1255 } 1256 } 1257 1258 for (i = 0; extras[i]; i++) { 1259 uint64_t buf; 1260 1261 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) { 1262 mdb_warn("failed to find '%s'", extras[i]); 1263 return (DCMD_ERR); 1264 } 1265 1266 if (sym.st_size != sizeof (uint64_t) && 1267 sym.st_size != sizeof (uint32_t)) { 1268 mdb_warn("expected scalar for variable '%s'\n", 1269 extras[i]); 1270 return (DCMD_ERR); 1271 } 1272 1273 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 1274 mdb_warn("couldn't read '%s'", extras[i]); 1275 return (DCMD_ERR); 1276 } 1277 1278 mdb_printf("%-25s = ", extras[i]); 1279 1280 /* NB: all the 64-bit extras happen to be byte counts */ 1281 if (sym.st_size == sizeof (uint64_t)) 1282 mdb_printf("%9llu %s\n", buf >> shift, suffix); 1283 1284 if (sym.st_size == sizeof (uint32_t)) 1285 mdb_printf("%9d\n", *((uint32_t *)&buf)); 1286 } 1287 return (DCMD_OK); 1288 } 1289 1290 typedef struct mdb_spa_print { 1291 pool_state_t spa_state; 1292 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; 1293 uintptr_t spa_normal_class; 1294 } mdb_spa_print_t; 1295 1296 1297 const char histo_stars[] = "****************************************"; 1298 const int histo_width = sizeof (histo_stars) - 1; 1299 1300 static void 1301 dump_histogram(const uint64_t *histo, int size, int offset) 1302 { 1303 int i; 1304 int minidx = size - 1; 1305 int maxidx = 0; 1306 uint64_t max = 0; 1307 1308 for (i = 0; i < size; i++) { 1309 if (histo[i] > max) 1310 max = histo[i]; 1311 if (histo[i] > 0 && i > maxidx) 1312 maxidx = i; 1313 if (histo[i] > 0 && i < minidx) 1314 minidx = i; 1315 } 1316 1317 if (max < histo_width) 1318 max = histo_width; 1319 1320 for (i = minidx; i <= maxidx; i++) { 1321 mdb_printf("%3u: %6llu %s\n", 1322 i + offset, (u_longlong_t)histo[i], 1323 &histo_stars[(max - histo[i]) * histo_width / max]); 1324 } 1325 } 1326 1327 typedef struct mdb_metaslab_class { 1328 uint64_t mc_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 1329 } mdb_metaslab_class_t; 1330 1331 /* 1332 * spa_class_histogram(uintptr_t class_addr) 1333 * 1334 * Prints free space histogram for a device class 1335 * 1336 * Returns DCMD_OK, or DCMD_ERR. 1337 */ 1338 static int 1339 spa_class_histogram(uintptr_t class_addr) 1340 { 1341 mdb_metaslab_class_t mc; 1342 if (mdb_ctf_vread(&mc, "metaslab_class_t", 1343 "mdb_metaslab_class_t", class_addr, 0) == -1) 1344 return (DCMD_ERR); 1345 1346 mdb_inc_indent(4); 1347 dump_histogram(mc.mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); 1348 mdb_dec_indent(4); 1349 return (DCMD_OK); 1350 } 1351 1352 /* 1353 * ::spa 1354 * 1355 * -c Print configuration information as well 1356 * -v Print vdev state 1357 * -e Print vdev error stats 1358 * -m Print vdev metaslab info 1359 * -M print vdev metaslab group info 1360 * -h Print histogram info (must be combined with -m or -M) 1361 * 1362 * Print a summarized spa_t. When given no arguments, prints out a table of all 1363 * active pools on the system. 1364 */ 1365 /* ARGSUSED */ 1366 static int 1367 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1368 { 1369 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1370 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1371 const char *state; 1372 int spa_flags = 0; 1373 1374 if (mdb_getopts(argc, argv, 1375 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags, 1376 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags, 1377 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1378 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1379 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1380 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1381 NULL) != argc) 1382 return (DCMD_USAGE); 1383 1384 if (!(flags & DCMD_ADDRSPEC)) { 1385 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1386 mdb_warn("can't walk spa"); 1387 return (DCMD_ERR); 1388 } 1389 1390 return (DCMD_OK); 1391 } 1392 1393 if (flags & DCMD_PIPE_OUT) { 1394 mdb_printf("%#lr\n", addr); 1395 return (DCMD_OK); 1396 } 1397 1398 if (DCMD_HDRSPEC(flags)) 1399 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1400 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1401 1402 mdb_spa_print_t spa; 1403 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1) 1404 return (DCMD_ERR); 1405 1406 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1407 state = "UNKNOWN"; 1408 else 1409 state = statetab[spa.spa_state]; 1410 1411 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1412 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1413 spa_class_histogram(spa.spa_normal_class); 1414 1415 if (spa_flags & SPA_FLAG_CONFIG) { 1416 mdb_printf("\n"); 1417 mdb_inc_indent(4); 1418 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1419 NULL) != DCMD_OK) 1420 return (DCMD_ERR); 1421 mdb_dec_indent(4); 1422 } 1423 1424 if (spa_flags & SPA_FLAG_ALL_VDEV) { 1425 mdb_arg_t v; 1426 char opts[100] = "-"; 1427 int args = 1428 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1; 1429 1430 if (spa_flags & SPA_FLAG_ERRORS) 1431 strcat(opts, "e"); 1432 if (spa_flags & SPA_FLAG_METASLABS) 1433 strcat(opts, "m"); 1434 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 1435 strcat(opts, "M"); 1436 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1437 strcat(opts, "h"); 1438 1439 v.a_type = MDB_TYPE_STRING; 1440 v.a_un.a_str = opts; 1441 1442 mdb_printf("\n"); 1443 mdb_inc_indent(4); 1444 if (mdb_call_dcmd("spa_vdevs", addr, flags, args, 1445 &v) != DCMD_OK) 1446 return (DCMD_ERR); 1447 mdb_dec_indent(4); 1448 } 1449 1450 return (DCMD_OK); 1451 } 1452 1453 typedef struct mdb_spa_config_spa { 1454 uintptr_t spa_config; 1455 } mdb_spa_config_spa_t; 1456 1457 /* 1458 * ::spa_config 1459 * 1460 * Given a spa_t, print the configuration information stored in spa_config. 1461 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1462 * We simply read the value of spa_config and pass off to ::nvlist. 1463 */ 1464 /* ARGSUSED */ 1465 static int 1466 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1467 { 1468 mdb_spa_config_spa_t spa; 1469 1470 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1471 return (DCMD_USAGE); 1472 1473 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", 1474 addr, 0) == -1) 1475 return (DCMD_ERR); 1476 1477 if (spa.spa_config == 0) { 1478 mdb_printf("(none)\n"); 1479 return (DCMD_OK); 1480 } 1481 1482 return (mdb_call_dcmd("nvlist", spa.spa_config, flags, 1483 0, NULL)); 1484 } 1485 1486 typedef struct mdb_range_tree { 1487 struct { 1488 uint64_t bt_num_elems; 1489 uint64_t bt_num_nodes; 1490 } rt_root; 1491 uint64_t rt_space; 1492 range_seg_type_t rt_type; 1493 uint8_t rt_shift; 1494 uint64_t rt_start; 1495 } mdb_range_tree_t; 1496 1497 typedef struct mdb_metaslab_group { 1498 uint64_t mg_fragmentation; 1499 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 1500 uintptr_t mg_vd; 1501 } mdb_metaslab_group_t; 1502 1503 typedef struct mdb_metaslab { 1504 uint64_t ms_id; 1505 uint64_t ms_start; 1506 uint64_t ms_size; 1507 int64_t ms_deferspace; 1508 uint64_t ms_fragmentation; 1509 uint64_t ms_weight; 1510 uintptr_t ms_allocating[TXG_SIZE]; 1511 uintptr_t ms_checkpointing; 1512 uintptr_t ms_freeing; 1513 uintptr_t ms_freed; 1514 uintptr_t ms_allocatable; 1515 uintptr_t ms_unflushed_frees; 1516 uintptr_t ms_unflushed_allocs; 1517 uintptr_t ms_sm; 1518 } mdb_metaslab_t; 1519 1520 typedef struct mdb_space_map_phys_t { 1521 int64_t smp_alloc; 1522 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE]; 1523 } mdb_space_map_phys_t; 1524 1525 typedef struct mdb_space_map { 1526 uint64_t sm_size; 1527 uint8_t sm_shift; 1528 uintptr_t sm_phys; 1529 } mdb_space_map_t; 1530 1531 typedef struct mdb_vdev { 1532 uint64_t vdev_id; 1533 uint64_t vdev_state; 1534 uintptr_t vdev_ops; 1535 struct { 1536 uint64_t vs_aux; 1537 uint64_t vs_ops[VS_ZIO_TYPES]; 1538 uint64_t vs_bytes[VS_ZIO_TYPES]; 1539 uint64_t vs_read_errors; 1540 uint64_t vs_write_errors; 1541 uint64_t vs_checksum_errors; 1542 } vdev_stat; 1543 uintptr_t vdev_child; 1544 uint64_t vdev_children; 1545 uint64_t vdev_ms_count; 1546 uintptr_t vdev_mg; 1547 uintptr_t vdev_ms; 1548 uintptr_t vdev_path; 1549 } mdb_vdev_t; 1550 1551 typedef struct mdb_vdev_ops { 1552 char vdev_op_type[16]; 1553 } mdb_vdev_ops_t; 1554 1555 static int 1556 metaslab_stats(mdb_vdev_t *vd, int spa_flags) 1557 { 1558 mdb_inc_indent(4); 1559 mdb_printf("%<u>%-?s %6s %20s %10s %10s %10s%</u>\n", "ADDR", "ID", 1560 "OFFSET", "FREE", "FRAG", "UCMU"); 1561 1562 uintptr_t *vdev_ms = mdb_alloc(vd->vdev_ms_count * sizeof (vdev_ms), 1563 UM_SLEEP | UM_GC); 1564 if (mdb_vread(vdev_ms, vd->vdev_ms_count * sizeof (uintptr_t), 1565 vd->vdev_ms) == -1) { 1566 mdb_warn("failed to read vdev_ms at %p\n", vd->vdev_ms); 1567 return (DCMD_ERR); 1568 } 1569 1570 for (int m = 0; m < vd->vdev_ms_count; m++) { 1571 mdb_metaslab_t ms; 1572 mdb_space_map_t sm = { 0 }; 1573 mdb_space_map_phys_t smp = { 0 }; 1574 mdb_range_tree_t rt; 1575 uint64_t uallocs, ufrees, raw_free, raw_uchanges_mem; 1576 char free[MDB_NICENUM_BUFLEN]; 1577 char uchanges_mem[MDB_NICENUM_BUFLEN]; 1578 1579 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1580 vdev_ms[m], 0) == -1) 1581 return (DCMD_ERR); 1582 1583 if (ms.ms_sm != 0 && 1584 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t", 1585 ms.ms_sm, 0) == -1) 1586 return (DCMD_ERR); 1587 1588 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", 1589 ms.ms_unflushed_frees, 0) == -1) 1590 return (DCMD_ERR); 1591 ufrees = rt.rt_space; 1592 raw_uchanges_mem = rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE; 1593 1594 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", 1595 ms.ms_unflushed_allocs, 0) == -1) 1596 return (DCMD_ERR); 1597 uallocs = rt.rt_space; 1598 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE; 1599 mdb_nicenum(raw_uchanges_mem, uchanges_mem); 1600 1601 raw_free = ms.ms_size; 1602 if (ms.ms_sm != 0 && sm.sm_phys != 0) { 1603 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 1604 "mdb_space_map_phys_t", sm.sm_phys, 0); 1605 raw_free -= smp.smp_alloc; 1606 } 1607 raw_free += ufrees - uallocs; 1608 mdb_nicenum(raw_free, free); 1609 1610 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id, 1611 ms.ms_start, free); 1612 if (ms.ms_fragmentation == ZFS_FRAG_INVALID) 1613 mdb_printf("%9s ", "-"); 1614 else 1615 mdb_printf("%9llu%% ", ms.ms_fragmentation); 1616 mdb_printf("%10s\n", uchanges_mem); 1617 1618 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != 0 && 1619 sm.sm_phys != 0) { 1620 dump_histogram(smp.smp_histogram, 1621 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift); 1622 } 1623 } 1624 mdb_dec_indent(4); 1625 return (DCMD_OK); 1626 } 1627 1628 static int 1629 metaslab_group_stats(mdb_vdev_t *vd, int spa_flags) 1630 { 1631 mdb_metaslab_group_t mg; 1632 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", 1633 vd->vdev_mg, 0) == -1) { 1634 mdb_warn("failed to read vdev_mg at %p\n", vd->vdev_mg); 1635 return (DCMD_ERR); 1636 } 1637 1638 mdb_inc_indent(4); 1639 mdb_printf("%<u>%-?s %7s %9s%</u>\n", "ADDR", "FRAG", "UCMU"); 1640 1641 if (mg.mg_fragmentation == ZFS_FRAG_INVALID) 1642 mdb_printf("%0?p %6s\n", vd->vdev_mg, "-"); 1643 else 1644 mdb_printf("%0?p %6llu%%", vd->vdev_mg, mg.mg_fragmentation); 1645 1646 1647 uintptr_t *vdev_ms = mdb_alloc(vd->vdev_ms_count * sizeof (vdev_ms), 1648 UM_SLEEP | UM_GC); 1649 if (mdb_vread(vdev_ms, vd->vdev_ms_count * sizeof (uintptr_t), 1650 vd->vdev_ms) == -1) { 1651 mdb_warn("failed to read vdev_ms at %p\n", vd->vdev_ms); 1652 return (DCMD_ERR); 1653 } 1654 1655 uint64_t raw_uchanges_mem = 0; 1656 char uchanges_mem[MDB_NICENUM_BUFLEN]; 1657 for (int m = 0; m < vd->vdev_ms_count; m++) { 1658 mdb_metaslab_t ms; 1659 mdb_range_tree_t rt; 1660 1661 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1662 vdev_ms[m], 0) == -1) 1663 return (DCMD_ERR); 1664 1665 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", 1666 ms.ms_unflushed_frees, 0) == -1) 1667 return (DCMD_ERR); 1668 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE; 1669 1670 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", 1671 ms.ms_unflushed_allocs, 0) == -1) 1672 return (DCMD_ERR); 1673 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE; 1674 } 1675 mdb_nicenum(raw_uchanges_mem, uchanges_mem); 1676 mdb_printf("%10s\n", uchanges_mem); 1677 1678 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1679 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); 1680 mdb_dec_indent(4); 1681 return (DCMD_OK); 1682 } 1683 1684 /* 1685 * ::vdev 1686 * 1687 * Print out a summarized vdev_t, in the following form: 1688 * 1689 * ADDR STATE AUX DESC 1690 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1691 * 1692 * If '-r' is specified, recursively visit all children. 1693 * 1694 * With '-e', the statistics associated with the vdev are printed as well. 1695 */ 1696 static int 1697 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive, 1698 int spa_flags) 1699 { 1700 mdb_vdev_t vd; 1701 if (mdb_ctf_vread(&vd, "vdev_t", "mdb_vdev_t", 1702 (uintptr_t)addr, 0) == -1) 1703 return (DCMD_ERR); 1704 1705 if (flags & DCMD_PIPE_OUT) { 1706 mdb_printf("%#lr\n", addr); 1707 } else { 1708 char desc[MAXNAMELEN]; 1709 if (vd.vdev_path != 0) { 1710 if (mdb_readstr(desc, sizeof (desc), 1711 (uintptr_t)vd.vdev_path) == -1) { 1712 mdb_warn("failed to read vdev_path at %p\n", 1713 vd.vdev_path); 1714 return (DCMD_ERR); 1715 } 1716 } else if (vd.vdev_ops != 0) { 1717 vdev_ops_t ops; 1718 if (mdb_vread(&ops, sizeof (ops), 1719 (uintptr_t)vd.vdev_ops) == -1) { 1720 mdb_warn("failed to read vdev_ops at %p\n", 1721 vd.vdev_ops); 1722 return (DCMD_ERR); 1723 } 1724 (void) strcpy(desc, ops.vdev_op_type); 1725 } else { 1726 (void) strcpy(desc, "<unknown>"); 1727 } 1728 1729 if (depth == 0 && DCMD_HDRSPEC(flags)) 1730 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1731 "ADDR", "STATE", "AUX", 1732 sizeof (uintptr_t) == 4 ? 43 : 35, 1733 "DESCRIPTION"); 1734 1735 mdb_printf("%0?p ", addr); 1736 1737 const char *state, *aux; 1738 switch (vd.vdev_state) { 1739 case VDEV_STATE_CLOSED: 1740 state = "CLOSED"; 1741 break; 1742 case VDEV_STATE_OFFLINE: 1743 state = "OFFLINE"; 1744 break; 1745 case VDEV_STATE_CANT_OPEN: 1746 state = "CANT_OPEN"; 1747 break; 1748 case VDEV_STATE_DEGRADED: 1749 state = "DEGRADED"; 1750 break; 1751 case VDEV_STATE_HEALTHY: 1752 state = "HEALTHY"; 1753 break; 1754 case VDEV_STATE_REMOVED: 1755 state = "REMOVED"; 1756 break; 1757 case VDEV_STATE_FAULTED: 1758 state = "FAULTED"; 1759 break; 1760 default: 1761 state = "UNKNOWN"; 1762 break; 1763 } 1764 1765 switch (vd.vdev_stat.vs_aux) { 1766 case VDEV_AUX_NONE: 1767 aux = "-"; 1768 break; 1769 case VDEV_AUX_OPEN_FAILED: 1770 aux = "OPEN_FAILED"; 1771 break; 1772 case VDEV_AUX_CORRUPT_DATA: 1773 aux = "CORRUPT_DATA"; 1774 break; 1775 case VDEV_AUX_NO_REPLICAS: 1776 aux = "NO_REPLICAS"; 1777 break; 1778 case VDEV_AUX_BAD_GUID_SUM: 1779 aux = "BAD_GUID_SUM"; 1780 break; 1781 case VDEV_AUX_TOO_SMALL: 1782 aux = "TOO_SMALL"; 1783 break; 1784 case VDEV_AUX_BAD_LABEL: 1785 aux = "BAD_LABEL"; 1786 break; 1787 case VDEV_AUX_VERSION_NEWER: 1788 aux = "VERS_NEWER"; 1789 break; 1790 case VDEV_AUX_VERSION_OLDER: 1791 aux = "VERS_OLDER"; 1792 break; 1793 case VDEV_AUX_UNSUP_FEAT: 1794 aux = "UNSUP_FEAT"; 1795 break; 1796 case VDEV_AUX_SPARED: 1797 aux = "SPARED"; 1798 break; 1799 case VDEV_AUX_ERR_EXCEEDED: 1800 aux = "ERR_EXCEEDED"; 1801 break; 1802 case VDEV_AUX_IO_FAILURE: 1803 aux = "IO_FAILURE"; 1804 break; 1805 case VDEV_AUX_BAD_LOG: 1806 aux = "BAD_LOG"; 1807 break; 1808 case VDEV_AUX_EXTERNAL: 1809 aux = "EXTERNAL"; 1810 break; 1811 case VDEV_AUX_SPLIT_POOL: 1812 aux = "SPLIT_POOL"; 1813 break; 1814 case VDEV_AUX_CHILDREN_OFFLINE: 1815 aux = "CHILDREN_OFFLINE"; 1816 break; 1817 default: 1818 aux = "UNKNOWN"; 1819 break; 1820 } 1821 1822 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1823 1824 if (spa_flags & SPA_FLAG_ERRORS) { 1825 int i; 1826 1827 mdb_inc_indent(4); 1828 mdb_printf("\n"); 1829 mdb_printf("%<u> %12s %12s %12s %12s " 1830 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1831 "IOCTL"); 1832 mdb_printf("OPS "); 1833 for (i = 1; i < VS_ZIO_TYPES; i++) 1834 mdb_printf("%11#llx%s", 1835 vd.vdev_stat.vs_ops[i], 1836 i == VS_ZIO_TYPES - 1 ? "" : " "); 1837 mdb_printf("\n"); 1838 mdb_printf("BYTES "); 1839 for (i = 1; i < VS_ZIO_TYPES; i++) 1840 mdb_printf("%11#llx%s", 1841 vd.vdev_stat.vs_bytes[i], 1842 i == VS_ZIO_TYPES - 1 ? "" : " "); 1843 1844 1845 mdb_printf("\n"); 1846 mdb_printf("EREAD %10#llx\n", 1847 vd.vdev_stat.vs_read_errors); 1848 mdb_printf("EWRITE %10#llx\n", 1849 vd.vdev_stat.vs_write_errors); 1850 mdb_printf("ECKSUM %10#llx\n", 1851 vd.vdev_stat.vs_checksum_errors); 1852 mdb_dec_indent(4); 1853 mdb_printf("\n"); 1854 } 1855 1856 if ((spa_flags & SPA_FLAG_METASLAB_GROUPS) && 1857 vd.vdev_mg != 0) { 1858 metaslab_group_stats(&vd, spa_flags); 1859 } 1860 if ((spa_flags & SPA_FLAG_METASLABS) && vd.vdev_ms != 0) { 1861 metaslab_stats(&vd, spa_flags); 1862 } 1863 } 1864 1865 uint64_t children = vd.vdev_children; 1866 if (children == 0 || !recursive) 1867 return (DCMD_OK); 1868 1869 uintptr_t *child = mdb_alloc(children * sizeof (child), 1870 UM_SLEEP | UM_GC); 1871 if (mdb_vread(child, children * sizeof (void *), vd.vdev_child) == -1) { 1872 mdb_warn("failed to read vdev children at %p", vd.vdev_child); 1873 return (DCMD_ERR); 1874 } 1875 1876 for (uint64_t c = 0; c < children; c++) { 1877 if (do_print_vdev(child[c], flags, depth + 2, recursive, 1878 spa_flags)) { 1879 return (DCMD_ERR); 1880 } 1881 } 1882 1883 return (DCMD_OK); 1884 } 1885 1886 static int 1887 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1888 { 1889 uint64_t depth = 0; 1890 boolean_t recursive = B_FALSE; 1891 int spa_flags = 0; 1892 1893 if (mdb_getopts(argc, argv, 1894 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1895 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1896 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1897 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1898 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1899 'd', MDB_OPT_UINT64, &depth, NULL) != argc) 1900 return (DCMD_USAGE); 1901 1902 if (!(flags & DCMD_ADDRSPEC)) { 1903 mdb_warn("no vdev_t address given\n"); 1904 return (DCMD_ERR); 1905 } 1906 1907 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags)); 1908 } 1909 1910 typedef struct mdb_metaslab_alloc_trace { 1911 uintptr_t mat_mg; 1912 uintptr_t mat_msp; 1913 uint64_t mat_size; 1914 uint64_t mat_weight; 1915 uint64_t mat_offset; 1916 uint32_t mat_dva_id; 1917 int mat_allocator; 1918 } mdb_metaslab_alloc_trace_t; 1919 1920 static void 1921 metaslab_print_weight(uint64_t weight) 1922 { 1923 char buf[100]; 1924 1925 if (WEIGHT_IS_SPACEBASED(weight)) { 1926 mdb_nicenum( 1927 weight & ~(METASLAB_ACTIVE_MASK | METASLAB_WEIGHT_TYPE), 1928 buf); 1929 } else { 1930 char size[MDB_NICENUM_BUFLEN]; 1931 mdb_nicenum(1ULL << WEIGHT_GET_INDEX(weight), size); 1932 (void) mdb_snprintf(buf, sizeof (buf), "%llu x %s", 1933 WEIGHT_GET_COUNT(weight), size); 1934 } 1935 mdb_printf("%11s ", buf); 1936 } 1937 1938 /* ARGSUSED */ 1939 static int 1940 metaslab_weight(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1941 { 1942 uint64_t weight = 0; 1943 char active; 1944 1945 if (argc == 0 && (flags & DCMD_ADDRSPEC)) { 1946 if (mdb_vread(&weight, sizeof (uint64_t), addr) == -1) { 1947 mdb_warn("failed to read weight at %p\n", addr); 1948 return (DCMD_ERR); 1949 } 1950 } else if (argc == 1 && !(flags & DCMD_ADDRSPEC)) { 1951 weight = (argv[0].a_type == MDB_TYPE_IMMEDIATE) ? 1952 argv[0].a_un.a_val : mdb_strtoull(argv[0].a_un.a_str); 1953 } else { 1954 return (DCMD_USAGE); 1955 } 1956 1957 if (DCMD_HDRSPEC(flags)) { 1958 mdb_printf("%<u>%-6s %9s %9s%</u>\n", 1959 "ACTIVE", "ALGORITHM", "WEIGHT"); 1960 } 1961 1962 if (weight & METASLAB_WEIGHT_PRIMARY) 1963 active = 'P'; 1964 else if (weight & METASLAB_WEIGHT_SECONDARY) 1965 active = 'S'; 1966 else 1967 active = '-'; 1968 mdb_printf("%6c %8s ", active, 1969 WEIGHT_IS_SPACEBASED(weight) ? "SPACE" : "SEGMENT"); 1970 metaslab_print_weight(weight); 1971 mdb_printf("\n"); 1972 1973 return (DCMD_OK); 1974 } 1975 1976 /* ARGSUSED */ 1977 static int 1978 metaslab_trace(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1979 { 1980 mdb_metaslab_alloc_trace_t mat; 1981 mdb_metaslab_group_t mg = { 0 }; 1982 char result_type[100]; 1983 1984 if (mdb_ctf_vread(&mat, "metaslab_alloc_trace_t", 1985 "mdb_metaslab_alloc_trace_t", addr, 0) == -1) { 1986 return (DCMD_ERR); 1987 } 1988 1989 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 1990 mdb_printf("%<u>%6s %6s %8s %11s %11s %18s %18s%</u>\n", 1991 "MSID", "DVA", "ASIZE", "ALLOCATOR", "WEIGHT", "RESULT", 1992 "VDEV"); 1993 } 1994 1995 if (mat.mat_msp != 0) { 1996 mdb_metaslab_t ms; 1997 1998 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1999 mat.mat_msp, 0) == -1) { 2000 return (DCMD_ERR); 2001 } 2002 mdb_printf("%6llu ", ms.ms_id); 2003 } else { 2004 mdb_printf("%6s ", "-"); 2005 } 2006 2007 mdb_printf("%6d %8llx %11llx ", mat.mat_dva_id, mat.mat_size, 2008 mat.mat_allocator); 2009 2010 metaslab_print_weight(mat.mat_weight); 2011 2012 if ((int64_t)mat.mat_offset < 0) { 2013 if (enum_lookup("enum trace_alloc_type", mat.mat_offset, 2014 "TRACE_", sizeof (result_type), result_type) == -1) { 2015 mdb_warn("Could not find enum for trace_alloc_type"); 2016 return (DCMD_ERR); 2017 } 2018 mdb_printf("%18s ", result_type); 2019 } else { 2020 mdb_printf("%<b>%18llx%</b> ", mat.mat_offset); 2021 } 2022 2023 if (mat.mat_mg != 0 && 2024 mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", 2025 mat.mat_mg, 0) == -1) { 2026 return (DCMD_ERR); 2027 } 2028 2029 if (mg.mg_vd != 0) { 2030 mdb_vdev_t vdev; 2031 char desc[MAXNAMELEN]; 2032 2033 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t", 2034 mg.mg_vd, 0) == -1) { 2035 return (DCMD_ERR); 2036 } 2037 2038 if (vdev.vdev_path != 0) { 2039 char path[MAXNAMELEN]; 2040 2041 if (mdb_readstr(path, sizeof (path), 2042 vdev.vdev_path) == -1) { 2043 mdb_warn("failed to read vdev_path at %p\n", 2044 vdev.vdev_path); 2045 return (DCMD_ERR); 2046 } 2047 char *slash; 2048 if ((slash = strrchr(path, '/')) != NULL) { 2049 strcpy(desc, slash + 1); 2050 } else { 2051 strcpy(desc, path); 2052 } 2053 } else if (vdev.vdev_ops != 0) { 2054 mdb_vdev_ops_t ops; 2055 if (mdb_ctf_vread(&ops, "vdev_ops_t", "mdb_vdev_ops_t", 2056 vdev.vdev_ops, 0) == -1) { 2057 mdb_warn("failed to read vdev_ops at %p\n", 2058 vdev.vdev_ops); 2059 return (DCMD_ERR); 2060 } 2061 (void) mdb_snprintf(desc, sizeof (desc), 2062 "%s-%llu", ops.vdev_op_type, vdev.vdev_id); 2063 } else { 2064 (void) strcpy(desc, "<unknown>"); 2065 } 2066 mdb_printf("%18s\n", desc); 2067 } 2068 2069 return (DCMD_OK); 2070 } 2071 2072 typedef struct metaslab_walk_data { 2073 uint64_t mw_numvdevs; 2074 uintptr_t *mw_vdevs; 2075 int mw_curvdev; 2076 uint64_t mw_nummss; 2077 uintptr_t *mw_mss; 2078 int mw_curms; 2079 } metaslab_walk_data_t; 2080 2081 static int 2082 metaslab_walk_step(mdb_walk_state_t *wsp) 2083 { 2084 metaslab_walk_data_t *mw = wsp->walk_data; 2085 metaslab_t ms; 2086 uintptr_t msp; 2087 2088 if (mw->mw_curvdev >= mw->mw_numvdevs) 2089 return (WALK_DONE); 2090 2091 if (mw->mw_mss == NULL) { 2092 uintptr_t mssp; 2093 uintptr_t vdevp; 2094 2095 ASSERT(mw->mw_curms == 0); 2096 ASSERT(mw->mw_nummss == 0); 2097 2098 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 2099 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || 2100 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { 2101 return (WALK_ERR); 2102 } 2103 2104 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 2105 UM_SLEEP | UM_GC); 2106 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 2107 mssp) == -1) { 2108 mdb_warn("failed to read vdev_ms at %p", mssp); 2109 return (WALK_ERR); 2110 } 2111 } 2112 2113 if (mw->mw_curms >= mw->mw_nummss) { 2114 mw->mw_mss = NULL; 2115 mw->mw_curms = 0; 2116 mw->mw_nummss = 0; 2117 mw->mw_curvdev++; 2118 return (WALK_NEXT); 2119 } 2120 2121 msp = mw->mw_mss[mw->mw_curms]; 2122 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 2123 mdb_warn("failed to read metaslab_t at %p", msp); 2124 return (WALK_ERR); 2125 } 2126 2127 mw->mw_curms++; 2128 2129 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 2130 } 2131 2132 static int 2133 metaslab_walk_init(mdb_walk_state_t *wsp) 2134 { 2135 metaslab_walk_data_t *mw; 2136 uintptr_t root_vdevp; 2137 uintptr_t childp; 2138 2139 if (wsp->walk_addr == 0) { 2140 mdb_warn("must supply address of spa_t\n"); 2141 return (WALK_ERR); 2142 } 2143 2144 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 2145 2146 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || 2147 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || 2148 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { 2149 return (DCMD_ERR); 2150 } 2151 2152 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 2153 UM_SLEEP | UM_GC); 2154 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 2155 childp) == -1) { 2156 mdb_warn("failed to read root vdev children at %p", childp); 2157 return (DCMD_ERR); 2158 } 2159 2160 wsp->walk_data = mw; 2161 2162 return (WALK_NEXT); 2163 } 2164 2165 typedef struct mdb_spa { 2166 uintptr_t spa_dsl_pool; 2167 uintptr_t spa_root_vdev; 2168 } mdb_spa_t; 2169 2170 typedef struct mdb_dsl_pool { 2171 uintptr_t dp_root_dir; 2172 } mdb_dsl_pool_t; 2173 2174 typedef struct mdb_dsl_dir { 2175 uintptr_t dd_dbuf; 2176 int64_t dd_space_towrite[TXG_SIZE]; 2177 } mdb_dsl_dir_t; 2178 2179 typedef struct mdb_dsl_dir_phys { 2180 uint64_t dd_used_bytes; 2181 uint64_t dd_compressed_bytes; 2182 uint64_t dd_uncompressed_bytes; 2183 } mdb_dsl_dir_phys_t; 2184 2185 typedef struct space_data { 2186 uint64_t ms_allocating[TXG_SIZE]; 2187 uint64_t ms_checkpointing; 2188 uint64_t ms_freeing; 2189 uint64_t ms_freed; 2190 uint64_t ms_unflushed_frees; 2191 uint64_t ms_unflushed_allocs; 2192 uint64_t ms_allocatable; 2193 int64_t ms_deferspace; 2194 uint64_t avail; 2195 } space_data_t; 2196 2197 /* ARGSUSED */ 2198 static int 2199 space_cb(uintptr_t addr, const void *unknown, void *arg) 2200 { 2201 space_data_t *sd = arg; 2202 mdb_metaslab_t ms; 2203 mdb_range_tree_t rt; 2204 mdb_space_map_t sm = { 0 }; 2205 mdb_space_map_phys_t smp = { 0 }; 2206 uint64_t uallocs, ufrees; 2207 int i; 2208 2209 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 2210 addr, 0) == -1) 2211 return (WALK_ERR); 2212 2213 for (i = 0; i < TXG_SIZE; i++) { 2214 if (mdb_ctf_vread(&rt, "range_tree_t", 2215 "mdb_range_tree_t", ms.ms_allocating[i], 0) == -1) 2216 return (WALK_ERR); 2217 sd->ms_allocating[i] += rt.rt_space; 2218 } 2219 2220 if (mdb_ctf_vread(&rt, "range_tree_t", 2221 "mdb_range_tree_t", ms.ms_checkpointing, 0) == -1) 2222 return (WALK_ERR); 2223 sd->ms_checkpointing += rt.rt_space; 2224 2225 if (mdb_ctf_vread(&rt, "range_tree_t", 2226 "mdb_range_tree_t", ms.ms_freeing, 0) == -1) 2227 return (WALK_ERR); 2228 sd->ms_freeing += rt.rt_space; 2229 2230 if (mdb_ctf_vread(&rt, "range_tree_t", 2231 "mdb_range_tree_t", ms.ms_freed, 0) == -1) 2232 return (WALK_ERR); 2233 sd->ms_freed += rt.rt_space; 2234 2235 if (mdb_ctf_vread(&rt, "range_tree_t", 2236 "mdb_range_tree_t", ms.ms_allocatable, 0) == -1) 2237 return (WALK_ERR); 2238 sd->ms_allocatable += rt.rt_space; 2239 2240 if (mdb_ctf_vread(&rt, "range_tree_t", 2241 "mdb_range_tree_t", ms.ms_unflushed_frees, 0) == -1) 2242 return (WALK_ERR); 2243 sd->ms_unflushed_frees += rt.rt_space; 2244 ufrees = rt.rt_space; 2245 2246 if (mdb_ctf_vread(&rt, "range_tree_t", 2247 "mdb_range_tree_t", ms.ms_unflushed_allocs, 0) == -1) 2248 return (WALK_ERR); 2249 sd->ms_unflushed_allocs += rt.rt_space; 2250 uallocs = rt.rt_space; 2251 2252 if (ms.ms_sm != 0 && 2253 mdb_ctf_vread(&sm, "space_map_t", 2254 "mdb_space_map_t", ms.ms_sm, 0) == -1) 2255 return (WALK_ERR); 2256 2257 if (sm.sm_phys != 0) { 2258 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 2259 "mdb_space_map_phys_t", sm.sm_phys, 0); 2260 } 2261 2262 sd->ms_deferspace += ms.ms_deferspace; 2263 sd->avail += sm.sm_size - smp.smp_alloc + ufrees - uallocs; 2264 2265 return (WALK_NEXT); 2266 } 2267 2268 /* 2269 * ::spa_space [-b] 2270 * 2271 * Given a spa_t, print out it's on-disk space usage and in-core 2272 * estimates of future usage. If -b is given, print space in bytes. 2273 * Otherwise print in megabytes. 2274 */ 2275 /* ARGSUSED */ 2276 static int 2277 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2278 { 2279 mdb_spa_t spa; 2280 mdb_dsl_pool_t dp; 2281 mdb_dsl_dir_t dd; 2282 mdb_dmu_buf_impl_t db; 2283 mdb_dsl_dir_phys_t dsp; 2284 space_data_t sd; 2285 int shift = 20; 2286 char *suffix = "M"; 2287 int bytes = B_FALSE; 2288 2289 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != 2290 argc) 2291 return (DCMD_USAGE); 2292 if (!(flags & DCMD_ADDRSPEC)) 2293 return (DCMD_USAGE); 2294 2295 if (bytes) { 2296 shift = 0; 2297 suffix = ""; 2298 } 2299 2300 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t", 2301 addr, 0) == -1 || 2302 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t", 2303 spa.spa_dsl_pool, 0) == -1 || 2304 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t", 2305 dp.dp_root_dir, 0) == -1 || 2306 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 2307 dd.dd_dbuf, 0) == -1 || 2308 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys", 2309 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) { 2310 return (DCMD_ERR); 2311 } 2312 2313 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 2314 dd.dd_space_towrite[0] >> shift, suffix, 2315 dd.dd_space_towrite[1] >> shift, suffix, 2316 dd.dd_space_towrite[2] >> shift, suffix, 2317 dd.dd_space_towrite[3] >> shift, suffix); 2318 2319 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 2320 dsp.dd_used_bytes >> shift, suffix); 2321 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 2322 dsp.dd_compressed_bytes >> shift, suffix); 2323 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 2324 dsp.dd_uncompressed_bytes >> shift, suffix); 2325 2326 bzero(&sd, sizeof (sd)); 2327 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 2328 mdb_warn("can't walk metaslabs"); 2329 return (DCMD_ERR); 2330 } 2331 2332 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 2333 sd.ms_allocating[0] >> shift, suffix, 2334 sd.ms_allocating[1] >> shift, suffix, 2335 sd.ms_allocating[2] >> shift, suffix, 2336 sd.ms_allocating[3] >> shift, suffix); 2337 mdb_printf("ms_checkpointing = %llu%s\n", 2338 sd.ms_checkpointing >> shift, suffix); 2339 mdb_printf("ms_freeing = %llu%s\n", 2340 sd.ms_freeing >> shift, suffix); 2341 mdb_printf("ms_freed = %llu%s\n", 2342 sd.ms_freed >> shift, suffix); 2343 mdb_printf("ms_unflushed_frees = %llu%s\n", 2344 sd.ms_unflushed_frees >> shift, suffix); 2345 mdb_printf("ms_unflushed_allocs = %llu%s\n", 2346 sd.ms_unflushed_allocs >> shift, suffix); 2347 mdb_printf("ms_allocatable = %llu%s\n", 2348 sd.ms_allocatable >> shift, suffix); 2349 mdb_printf("ms_deferspace = %llu%s\n", 2350 sd.ms_deferspace >> shift, suffix); 2351 mdb_printf("current avail = %llu%s\n", 2352 sd.avail >> shift, suffix); 2353 2354 return (DCMD_OK); 2355 } 2356 2357 typedef struct mdb_spa_aux_vdev { 2358 int sav_count; 2359 uintptr_t sav_vdevs; 2360 } mdb_spa_aux_vdev_t; 2361 2362 typedef struct mdb_spa_vdevs { 2363 uintptr_t spa_root_vdev; 2364 mdb_spa_aux_vdev_t spa_l2cache; 2365 mdb_spa_aux_vdev_t spa_spares; 2366 } mdb_spa_vdevs_t; 2367 2368 static int 2369 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 2370 const char *name) 2371 { 2372 uintptr_t *aux; 2373 size_t len; 2374 int ret, i; 2375 2376 /* 2377 * Iterate over aux vdevs and print those out as well. This is a 2378 * little annoying because we don't have a root vdev to pass to ::vdev. 2379 * Instead, we print a single line and then call it for each child 2380 * vdev. 2381 */ 2382 if (sav->sav_count != 0) { 2383 v[1].a_type = MDB_TYPE_STRING; 2384 v[1].a_un.a_str = "-d"; 2385 v[2].a_type = MDB_TYPE_IMMEDIATE; 2386 v[2].a_un.a_val = 2; 2387 2388 len = sav->sav_count * sizeof (uintptr_t); 2389 aux = mdb_alloc(len, UM_SLEEP); 2390 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) { 2391 mdb_free(aux, len); 2392 mdb_warn("failed to read l2cache vdevs at %p", 2393 sav->sav_vdevs); 2394 return (DCMD_ERR); 2395 } 2396 2397 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 2398 2399 for (i = 0; i < sav->sav_count; i++) { 2400 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 2401 if (ret != DCMD_OK) { 2402 mdb_free(aux, len); 2403 return (ret); 2404 } 2405 } 2406 2407 mdb_free(aux, len); 2408 } 2409 2410 return (0); 2411 } 2412 2413 /* 2414 * ::spa_vdevs 2415 * 2416 * -e Include error stats 2417 * -m Include metaslab information 2418 * -M Include metaslab group information 2419 * -h Include histogram information (requires -m or -M) 2420 * 2421 * Print out a summarized list of vdevs for the given spa_t. 2422 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 2423 * iterating over the cache devices. 2424 */ 2425 /* ARGSUSED */ 2426 static int 2427 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2428 { 2429 mdb_arg_t v[3]; 2430 int ret; 2431 char opts[100] = "-r"; 2432 int spa_flags = 0; 2433 2434 if (mdb_getopts(argc, argv, 2435 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 2436 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 2437 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 2438 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 2439 NULL) != argc) 2440 return (DCMD_USAGE); 2441 2442 if (!(flags & DCMD_ADDRSPEC)) 2443 return (DCMD_USAGE); 2444 2445 mdb_spa_vdevs_t spa; 2446 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1) 2447 return (DCMD_ERR); 2448 2449 /* 2450 * Unitialized spa_t structures can have a NULL root vdev. 2451 */ 2452 if (spa.spa_root_vdev == 0) { 2453 mdb_printf("no associated vdevs\n"); 2454 return (DCMD_OK); 2455 } 2456 2457 if (spa_flags & SPA_FLAG_ERRORS) 2458 strcat(opts, "e"); 2459 if (spa_flags & SPA_FLAG_METASLABS) 2460 strcat(opts, "m"); 2461 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 2462 strcat(opts, "M"); 2463 if (spa_flags & SPA_FLAG_HISTOGRAMS) 2464 strcat(opts, "h"); 2465 2466 v[0].a_type = MDB_TYPE_STRING; 2467 v[0].a_un.a_str = opts; 2468 2469 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 2470 flags, 1, v); 2471 if (ret != DCMD_OK) 2472 return (ret); 2473 2474 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 2475 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 2476 return (DCMD_ERR); 2477 2478 return (DCMD_OK); 2479 } 2480 2481 /* 2482 * ::zio 2483 * 2484 * Print a summary of zio_t and all its children. This is intended to display a 2485 * zio tree, and hence we only pick the most important pieces of information for 2486 * the main summary. More detailed information can always be found by doing a 2487 * '::print zio' on the underlying zio_t. The columns we display are: 2488 * 2489 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED 2490 * 2491 * The 'address' column is indented by one space for each depth level as we 2492 * descend down the tree. 2493 */ 2494 2495 #define ZIO_MAXINDENT 7 2496 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 2497 #define ZIO_WALK_SELF 0 2498 #define ZIO_WALK_CHILD 1 2499 #define ZIO_WALK_PARENT 2 2500 2501 typedef struct zio_print_args { 2502 int zpa_current_depth; 2503 int zpa_min_depth; 2504 int zpa_max_depth; 2505 int zpa_type; 2506 uint_t zpa_flags; 2507 } zio_print_args_t; 2508 2509 typedef struct mdb_zio { 2510 enum zio_type io_type; 2511 enum zio_stage io_stage; 2512 uintptr_t io_waiter; 2513 uintptr_t io_spa; 2514 struct { 2515 struct { 2516 uintptr_t list_next; 2517 } list_head; 2518 } io_parent_list; 2519 int io_error; 2520 } mdb_zio_t; 2521 2522 typedef struct mdb_zio_timestamp { 2523 hrtime_t io_timestamp; 2524 } mdb_zio_timestamp_t; 2525 2526 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 2527 2528 static int 2529 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) 2530 { 2531 mdb_ctf_id_t type_enum, stage_enum; 2532 int indent = zpa->zpa_current_depth; 2533 const char *type, *stage; 2534 uintptr_t laddr; 2535 mdb_zio_t zio; 2536 mdb_zio_timestamp_t zio_timestamp = { 0 }; 2537 2538 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) 2539 return (WALK_ERR); 2540 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", 2541 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); 2542 2543 if (indent > ZIO_MAXINDENT) 2544 indent = ZIO_MAXINDENT; 2545 2546 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 2547 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 2548 mdb_warn("failed to lookup zio enums"); 2549 return (WALK_ERR); 2550 } 2551 2552 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) 2553 type += sizeof ("ZIO_TYPE_") - 1; 2554 else 2555 type = "?"; 2556 2557 if (zio.io_error == 0) { 2558 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); 2559 if (stage != NULL) 2560 stage += sizeof ("ZIO_STAGE_") - 1; 2561 else 2562 stage = "?"; 2563 } else { 2564 stage = "FAILED"; 2565 } 2566 2567 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 2568 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 2569 mdb_printf("%?p\n", addr); 2570 } else { 2571 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 2572 ZIO_MAXWIDTH - indent, addr, type, stage); 2573 if (zio.io_waiter != 0) 2574 mdb_printf("%-16lx ", zio.io_waiter); 2575 else 2576 mdb_printf("%-16s ", "-"); 2577 #ifdef _KERNEL 2578 if (zio_timestamp.io_timestamp != 0) { 2579 mdb_printf("%llums", (mdb_gethrtime() - 2580 zio_timestamp.io_timestamp) / 2581 1000000); 2582 } else { 2583 mdb_printf("%-12s ", "-"); 2584 } 2585 #else 2586 mdb_printf("%-12s ", "-"); 2587 #endif 2588 mdb_printf("\n"); 2589 } 2590 } 2591 2592 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 2593 return (WALK_NEXT); 2594 2595 if (zpa->zpa_type == ZIO_WALK_PARENT) 2596 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2597 "io_parent_list"); 2598 else 2599 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2600 "io_child_list"); 2601 2602 zpa->zpa_current_depth++; 2603 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 2604 mdb_warn("failed to walk zio_t children at %p\n", laddr); 2605 return (WALK_ERR); 2606 } 2607 zpa->zpa_current_depth--; 2608 2609 return (WALK_NEXT); 2610 } 2611 2612 /* ARGSUSED */ 2613 static int 2614 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 2615 { 2616 zio_link_t zl; 2617 uintptr_t ziop; 2618 zio_print_args_t *zpa = arg; 2619 2620 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 2621 mdb_warn("failed to read zio_link_t at %p", addr); 2622 return (WALK_ERR); 2623 } 2624 2625 if (zpa->zpa_type == ZIO_WALK_PARENT) 2626 ziop = (uintptr_t)zl.zl_parent; 2627 else 2628 ziop = (uintptr_t)zl.zl_child; 2629 2630 return (zio_print_cb(ziop, zpa)); 2631 } 2632 2633 /* ARGSUSED */ 2634 static int 2635 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2636 { 2637 zio_print_args_t zpa = { 0 }; 2638 2639 if (!(flags & DCMD_ADDRSPEC)) 2640 return (DCMD_USAGE); 2641 2642 if (mdb_getopts(argc, argv, 2643 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 2644 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 2645 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, 2646 NULL) != argc) 2647 return (DCMD_USAGE); 2648 2649 zpa.zpa_flags = flags; 2650 if (zpa.zpa_max_depth != 0) { 2651 if (zpa.zpa_type == ZIO_WALK_SELF) 2652 zpa.zpa_type = ZIO_WALK_CHILD; 2653 } else if (zpa.zpa_type != ZIO_WALK_SELF) { 2654 zpa.zpa_min_depth = 1; 2655 zpa.zpa_max_depth = 1; 2656 } 2657 2658 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 2659 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n", 2660 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", 2661 "TIME_ELAPSED"); 2662 } 2663 2664 if (zio_print_cb(addr, &zpa) != WALK_NEXT) 2665 return (DCMD_ERR); 2666 2667 return (DCMD_OK); 2668 } 2669 2670 /* 2671 * [addr]::zio_state 2672 * 2673 * Print a summary of all zio_t structures on the system, or for a particular 2674 * pool. This is equivalent to '::walk zio_root | ::zio'. 2675 */ 2676 /*ARGSUSED*/ 2677 static int 2678 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2679 { 2680 /* 2681 * MDB will remember the last address of the pipeline, so if we don't 2682 * zero this we'll end up trying to walk zio structures for a 2683 * non-existent spa_t. 2684 */ 2685 if (!(flags & DCMD_ADDRSPEC)) 2686 addr = 0; 2687 2688 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 2689 } 2690 2691 2692 typedef struct mdb_zfs_btree_hdr { 2693 uintptr_t bth_parent; 2694 boolean_t bth_core; 2695 /* 2696 * For both leaf and core nodes, represents the number of elements in 2697 * the node. For core nodes, they will have bth_count + 1 children. 2698 */ 2699 uint32_t bth_count; 2700 } mdb_zfs_btree_hdr_t; 2701 2702 typedef struct mdb_zfs_btree_core { 2703 mdb_zfs_btree_hdr_t btc_hdr; 2704 uintptr_t btc_children[BTREE_CORE_ELEMS + 1]; 2705 uint8_t btc_elems[]; 2706 } mdb_zfs_btree_core_t; 2707 2708 typedef struct mdb_zfs_btree_leaf { 2709 mdb_zfs_btree_hdr_t btl_hdr; 2710 uint8_t btl_elems[]; 2711 } mdb_zfs_btree_leaf_t; 2712 2713 typedef struct mdb_zfs_btree { 2714 uintptr_t bt_root; 2715 size_t bt_elem_size; 2716 } mdb_zfs_btree_t; 2717 2718 typedef struct btree_walk_data { 2719 mdb_zfs_btree_t bwd_btree; 2720 mdb_zfs_btree_hdr_t *bwd_node; 2721 uint64_t bwd_offset; // In units of bt_node_size 2722 } btree_walk_data_t; 2723 2724 static uintptr_t 2725 btree_leftmost_child(uintptr_t addr, mdb_zfs_btree_hdr_t *buf) 2726 { 2727 size_t size = offsetof(zfs_btree_core_t, btc_children) + 2728 sizeof (uintptr_t); 2729 for (;;) { 2730 if (mdb_vread(buf, size, addr) == -1) { 2731 mdb_warn("failed to read at %p\n", addr); 2732 return ((uintptr_t)0ULL); 2733 } 2734 if (!buf->bth_core) 2735 return (addr); 2736 mdb_zfs_btree_core_t *node = (mdb_zfs_btree_core_t *)buf; 2737 addr = node->btc_children[0]; 2738 } 2739 } 2740 2741 static int 2742 btree_walk_step(mdb_walk_state_t *wsp) 2743 { 2744 btree_walk_data_t *bwd = wsp->walk_data; 2745 size_t elem_size = bwd->bwd_btree.bt_elem_size; 2746 if (wsp->walk_addr == 0ULL) 2747 return (WALK_DONE); 2748 2749 if (!bwd->bwd_node->bth_core) { 2750 /* 2751 * For the first element in a leaf node, read in the full 2752 * leaf, since we only had part of it read in before. 2753 */ 2754 if (bwd->bwd_offset == 0) { 2755 if (mdb_vread(bwd->bwd_node, BTREE_LEAF_SIZE, 2756 wsp->walk_addr) == -1) { 2757 mdb_warn("failed to read at %p\n", 2758 wsp->walk_addr); 2759 return (WALK_ERR); 2760 } 2761 } 2762 2763 int status = wsp->walk_callback((uintptr_t)(wsp->walk_addr + 2764 offsetof(mdb_zfs_btree_leaf_t, btl_elems) + 2765 bwd->bwd_offset * elem_size), bwd->bwd_node, 2766 wsp->walk_cbdata); 2767 if (status != WALK_NEXT) 2768 return (status); 2769 bwd->bwd_offset++; 2770 2771 /* Find the next element, if we're at the end of the leaf. */ 2772 while (bwd->bwd_offset == bwd->bwd_node->bth_count) { 2773 uintptr_t par = bwd->bwd_node->bth_parent; 2774 uintptr_t cur = wsp->walk_addr; 2775 wsp->walk_addr = par; 2776 if (par == 0ULL) 2777 return (WALK_NEXT); 2778 2779 size_t size = sizeof (zfs_btree_core_t) + 2780 BTREE_CORE_ELEMS * elem_size; 2781 if (mdb_vread(bwd->bwd_node, size, wsp->walk_addr) == 2782 -1) { 2783 mdb_warn("failed to read at %p\n", 2784 wsp->walk_addr); 2785 return (WALK_ERR); 2786 } 2787 mdb_zfs_btree_core_t *node = 2788 (mdb_zfs_btree_core_t *)bwd->bwd_node; 2789 int i; 2790 for (i = 0; i <= bwd->bwd_node->bth_count; i++) { 2791 if (node->btc_children[i] == cur) 2792 break; 2793 } 2794 if (i > bwd->bwd_node->bth_count) { 2795 mdb_warn("btree parent/child mismatch at " 2796 "%#lx\n", cur); 2797 return (WALK_ERR); 2798 } 2799 bwd->bwd_offset = i; 2800 } 2801 return (WALK_NEXT); 2802 } 2803 2804 if (!bwd->bwd_node->bth_core) { 2805 mdb_warn("Invalid btree node at %#lx\n", wsp->walk_addr); 2806 return (WALK_ERR); 2807 } 2808 mdb_zfs_btree_core_t *node = (mdb_zfs_btree_core_t *)bwd->bwd_node; 2809 int status = wsp->walk_callback((uintptr_t)(wsp->walk_addr + 2810 offsetof(mdb_zfs_btree_core_t, btc_elems) + bwd->bwd_offset * 2811 elem_size), bwd->bwd_node, wsp->walk_cbdata); 2812 if (status != WALK_NEXT) 2813 return (status); 2814 2815 uintptr_t new_child = node->btc_children[bwd->bwd_offset + 1]; 2816 wsp->walk_addr = btree_leftmost_child(new_child, bwd->bwd_node); 2817 if (wsp->walk_addr == 0ULL) 2818 return (WALK_ERR); 2819 2820 bwd->bwd_offset = 0; 2821 return (WALK_NEXT); 2822 } 2823 2824 static int 2825 btree_walk_init(mdb_walk_state_t *wsp) 2826 { 2827 btree_walk_data_t *bwd; 2828 2829 if (wsp->walk_addr == 0ULL) { 2830 mdb_warn("must supply address of zfs_btree_t\n"); 2831 return (WALK_ERR); 2832 } 2833 2834 bwd = mdb_zalloc(sizeof (btree_walk_data_t), UM_SLEEP); 2835 if (mdb_ctf_vread(&bwd->bwd_btree, "zfs_btree_t", "mdb_zfs_btree_t", 2836 wsp->walk_addr, 0) == -1) { 2837 mdb_free(bwd, sizeof (*bwd)); 2838 return (WALK_ERR); 2839 } 2840 2841 if (bwd->bwd_btree.bt_elem_size == 0) { 2842 mdb_warn("invalid or uninitialized btree at %#lx\n", 2843 wsp->walk_addr); 2844 mdb_free(bwd, sizeof (*bwd)); 2845 return (WALK_ERR); 2846 } 2847 2848 size_t size = MAX(BTREE_LEAF_SIZE, sizeof (zfs_btree_core_t) + 2849 BTREE_CORE_ELEMS * bwd->bwd_btree.bt_elem_size); 2850 bwd->bwd_node = mdb_zalloc(size, UM_SLEEP); 2851 2852 uintptr_t node = (uintptr_t)bwd->bwd_btree.bt_root; 2853 if (node == 0ULL) { 2854 wsp->walk_addr = 0ULL; 2855 wsp->walk_data = bwd; 2856 return (WALK_NEXT); 2857 } 2858 node = btree_leftmost_child(node, bwd->bwd_node); 2859 if (node == 0ULL) { 2860 mdb_free(bwd->bwd_node, size); 2861 mdb_free(bwd, sizeof (*bwd)); 2862 return (WALK_ERR); 2863 } 2864 bwd->bwd_offset = 0; 2865 2866 wsp->walk_addr = node; 2867 wsp->walk_data = bwd; 2868 return (WALK_NEXT); 2869 } 2870 2871 static void 2872 btree_walk_fini(mdb_walk_state_t *wsp) 2873 { 2874 btree_walk_data_t *bwd = (btree_walk_data_t *)wsp->walk_data; 2875 2876 if (bwd == NULL) 2877 return; 2878 2879 size_t size = MAX(BTREE_LEAF_SIZE, sizeof (zfs_btree_core_t) + 2880 BTREE_CORE_ELEMS * bwd->bwd_btree.bt_elem_size); 2881 if (bwd->bwd_node != NULL) 2882 mdb_free(bwd->bwd_node, size); 2883 2884 mdb_free(bwd, sizeof (*bwd)); 2885 } 2886 2887 typedef struct mdb_multilist { 2888 uint64_t ml_num_sublists; 2889 uintptr_t ml_sublists; 2890 } mdb_multilist_t; 2891 2892 static int 2893 multilist_walk_step(mdb_walk_state_t *wsp) 2894 { 2895 return (wsp->walk_callback(wsp->walk_addr, wsp->walk_layer, 2896 wsp->walk_cbdata)); 2897 } 2898 2899 static int 2900 multilist_walk_init(mdb_walk_state_t *wsp) 2901 { 2902 mdb_multilist_t ml; 2903 ssize_t sublist_sz; 2904 int list_offset; 2905 size_t i; 2906 2907 if (wsp->walk_addr == 0) { 2908 mdb_warn("must supply address of multilist_t\n"); 2909 return (WALK_ERR); 2910 } 2911 2912 if (mdb_ctf_vread(&ml, "multilist_t", "mdb_multilist_t", 2913 wsp->walk_addr, 0) == -1) { 2914 return (WALK_ERR); 2915 } 2916 2917 if (ml.ml_num_sublists == 0 || ml.ml_sublists == 0) { 2918 mdb_warn("invalid or uninitialized multilist at %#lx\n", 2919 wsp->walk_addr); 2920 return (WALK_ERR); 2921 } 2922 2923 /* mdb_ctf_sizeof_by_name() will print an error for us */ 2924 sublist_sz = mdb_ctf_sizeof_by_name("multilist_sublist_t"); 2925 if (sublist_sz == -1) 2926 return (WALK_ERR); 2927 2928 /* mdb_ctf_offsetof_by_name will print an error for us */ 2929 list_offset = mdb_ctf_offsetof_by_name("multilist_sublist_t", 2930 "mls_list"); 2931 if (list_offset == -1) 2932 return (WALK_ERR); 2933 2934 for (i = 0; i < ml.ml_num_sublists; i++) { 2935 wsp->walk_addr = ml.ml_sublists + i * sublist_sz + list_offset; 2936 2937 if (mdb_layered_walk("list", wsp) == -1) { 2938 mdb_warn("can't walk multilist sublist"); 2939 return (WALK_ERR); 2940 } 2941 } 2942 2943 return (WALK_NEXT); 2944 } 2945 2946 typedef struct mdb_txg_list { 2947 size_t tl_offset; 2948 uintptr_t tl_head[TXG_SIZE]; 2949 } mdb_txg_list_t; 2950 2951 typedef struct txg_list_walk_data { 2952 uintptr_t lw_head[TXG_SIZE]; 2953 int lw_txgoff; 2954 int lw_maxoff; 2955 size_t lw_offset; 2956 void *lw_obj; 2957 } txg_list_walk_data_t; 2958 2959 static int 2960 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 2961 { 2962 txg_list_walk_data_t *lwd; 2963 mdb_txg_list_t list; 2964 int i; 2965 2966 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 2967 if (mdb_ctf_vread(&list, "txg_list_t", "mdb_txg_list_t", wsp->walk_addr, 2968 0) == -1) { 2969 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 2970 return (WALK_ERR); 2971 } 2972 2973 for (i = 0; i < TXG_SIZE; i++) 2974 lwd->lw_head[i] = list.tl_head[i]; 2975 lwd->lw_offset = list.tl_offset; 2976 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 2977 UM_SLEEP | UM_GC); 2978 lwd->lw_txgoff = txg; 2979 lwd->lw_maxoff = maxoff; 2980 2981 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2982 wsp->walk_data = lwd; 2983 2984 return (WALK_NEXT); 2985 } 2986 2987 static int 2988 txg_list_walk_init(mdb_walk_state_t *wsp) 2989 { 2990 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 2991 } 2992 2993 static int 2994 txg_list0_walk_init(mdb_walk_state_t *wsp) 2995 { 2996 return (txg_list_walk_init_common(wsp, 0, 0)); 2997 } 2998 2999 static int 3000 txg_list1_walk_init(mdb_walk_state_t *wsp) 3001 { 3002 return (txg_list_walk_init_common(wsp, 1, 1)); 3003 } 3004 3005 static int 3006 txg_list2_walk_init(mdb_walk_state_t *wsp) 3007 { 3008 return (txg_list_walk_init_common(wsp, 2, 2)); 3009 } 3010 3011 static int 3012 txg_list3_walk_init(mdb_walk_state_t *wsp) 3013 { 3014 return (txg_list_walk_init_common(wsp, 3, 3)); 3015 } 3016 3017 static int 3018 txg_list_walk_step(mdb_walk_state_t *wsp) 3019 { 3020 txg_list_walk_data_t *lwd = wsp->walk_data; 3021 uintptr_t addr; 3022 txg_node_t *node; 3023 int status; 3024 3025 while (wsp->walk_addr == 0 && lwd->lw_txgoff < lwd->lw_maxoff) { 3026 lwd->lw_txgoff++; 3027 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 3028 } 3029 3030 if (wsp->walk_addr == 0) 3031 return (WALK_DONE); 3032 3033 addr = wsp->walk_addr - lwd->lw_offset; 3034 3035 if (mdb_vread(lwd->lw_obj, 3036 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 3037 mdb_warn("failed to read list element at %#lx", addr); 3038 return (WALK_ERR); 3039 } 3040 3041 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 3042 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 3043 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 3044 3045 return (status); 3046 } 3047 3048 /* 3049 * ::walk spa 3050 * 3051 * Walk all named spa_t structures in the namespace. This is nothing more than 3052 * a layered avl walk. 3053 */ 3054 static int 3055 spa_walk_init(mdb_walk_state_t *wsp) 3056 { 3057 GElf_Sym sym; 3058 3059 if (wsp->walk_addr != 0) { 3060 mdb_warn("spa walk only supports global walks\n"); 3061 return (WALK_ERR); 3062 } 3063 3064 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 3065 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 3066 return (WALK_ERR); 3067 } 3068 3069 wsp->walk_addr = (uintptr_t)sym.st_value; 3070 3071 if (mdb_layered_walk("avl", wsp) == -1) { 3072 mdb_warn("failed to walk 'avl'\n"); 3073 return (WALK_ERR); 3074 } 3075 3076 return (WALK_NEXT); 3077 } 3078 3079 static int 3080 spa_walk_step(mdb_walk_state_t *wsp) 3081 { 3082 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata)); 3083 } 3084 3085 /* 3086 * [addr]::walk zio 3087 * 3088 * Walk all active zio_t structures on the system. This is simply a layered 3089 * walk on top of ::walk zio_cache, with the optional ability to limit the 3090 * structures to a particular pool. 3091 */ 3092 static int 3093 zio_walk_init(mdb_walk_state_t *wsp) 3094 { 3095 wsp->walk_data = (void *)wsp->walk_addr; 3096 3097 if (mdb_layered_walk("zio_cache", wsp) == -1) { 3098 mdb_warn("failed to walk 'zio_cache'\n"); 3099 return (WALK_ERR); 3100 } 3101 3102 return (WALK_NEXT); 3103 } 3104 3105 static int 3106 zio_walk_step(mdb_walk_state_t *wsp) 3107 { 3108 mdb_zio_t zio; 3109 uintptr_t spa = (uintptr_t)wsp->walk_data; 3110 3111 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 3112 wsp->walk_addr, 0) == -1) 3113 return (WALK_ERR); 3114 3115 if (spa != 0 && spa != zio.io_spa) 3116 return (WALK_NEXT); 3117 3118 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 3119 } 3120 3121 /* 3122 * [addr]::walk zio_root 3123 * 3124 * Walk only root zio_t structures, optionally for a particular spa_t. 3125 */ 3126 static int 3127 zio_walk_root_step(mdb_walk_state_t *wsp) 3128 { 3129 mdb_zio_t zio; 3130 uintptr_t spa = (uintptr_t)wsp->walk_data; 3131 3132 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 3133 wsp->walk_addr, 0) == -1) 3134 return (WALK_ERR); 3135 3136 if (spa != 0 && spa != zio.io_spa) 3137 return (WALK_NEXT); 3138 3139 /* If the parent list is not empty, ignore */ 3140 if (zio.io_parent_list.list_head.list_next != 3141 wsp->walk_addr + 3142 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + 3143 mdb_ctf_offsetof_by_name("struct list", "list_head")) 3144 return (WALK_NEXT); 3145 3146 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 3147 } 3148 3149 /* 3150 * ::zfs_blkstats 3151 * 3152 * -v print verbose per-level information 3153 * 3154 */ 3155 static int 3156 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3157 { 3158 boolean_t verbose = B_FALSE; 3159 zfs_all_blkstats_t stats; 3160 dmu_object_type_t t; 3161 zfs_blkstat_t *tzb; 3162 uint64_t ditto; 3163 3164 if (mdb_getopts(argc, argv, 3165 'v', MDB_OPT_SETBITS, TRUE, &verbose, 3166 NULL) != argc) 3167 return (DCMD_USAGE); 3168 3169 if (!(flags & DCMD_ADDRSPEC)) 3170 return (DCMD_USAGE); 3171 3172 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || 3173 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || 3174 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 3175 mdb_warn("failed to read data at %p;", addr); 3176 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 3177 return (DCMD_ERR); 3178 } 3179 3180 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 3181 if (tzb->zb_gangs != 0) { 3182 mdb_printf("Ganged blocks: %llu\n", 3183 (longlong_t)tzb->zb_gangs); 3184 } 3185 3186 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 3187 tzb->zb_ditto_3_of_3_samevdev; 3188 if (ditto != 0) { 3189 mdb_printf("Dittoed blocks on same vdev: %llu\n", 3190 (longlong_t)ditto); 3191 } 3192 3193 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 3194 "\t avg\t comp\t%%Total\tType\n"); 3195 3196 for (t = 0; t <= DMU_OT_TOTAL; t++) { 3197 char csize[MDB_NICENUM_BUFLEN], lsize[MDB_NICENUM_BUFLEN]; 3198 char psize[MDB_NICENUM_BUFLEN], asize[MDB_NICENUM_BUFLEN]; 3199 char avg[MDB_NICENUM_BUFLEN]; 3200 char comp[MDB_NICENUM_BUFLEN], pct[MDB_NICENUM_BUFLEN]; 3201 char typename[64]; 3202 int l; 3203 3204 3205 if (t == DMU_OT_DEFERRED) 3206 strcpy(typename, "deferred free"); 3207 else if (t == DMU_OT_OTHER) 3208 strcpy(typename, "other"); 3209 else if (t == DMU_OT_TOTAL) 3210 strcpy(typename, "Total"); 3211 else if (enum_lookup("enum dmu_object_type", 3212 t, "DMU_OT_", sizeof (typename), typename) == -1) { 3213 mdb_warn("failed to read type name"); 3214 return (DCMD_ERR); 3215 } 3216 3217 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 3218 continue; 3219 3220 for (l = -1; l < DN_MAX_LEVELS; l++) { 3221 int level = (l == -1 ? DN_MAX_LEVELS : l); 3222 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 3223 3224 if (zb->zb_asize == 0) 3225 continue; 3226 3227 /* 3228 * Don't print each level unless requested. 3229 */ 3230 if (!verbose && level != DN_MAX_LEVELS) 3231 continue; 3232 3233 /* 3234 * If all the space is level 0, don't print the 3235 * level 0 separately. 3236 */ 3237 if (level == 0 && zb->zb_asize == 3238 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 3239 continue; 3240 3241 mdb_nicenum(zb->zb_count, csize); 3242 mdb_nicenum(zb->zb_lsize, lsize); 3243 mdb_nicenum(zb->zb_psize, psize); 3244 mdb_nicenum(zb->zb_asize, asize); 3245 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 3246 (void) mdb_snprintfrac(comp, MDB_NICENUM_BUFLEN, 3247 zb->zb_lsize, zb->zb_psize, 2); 3248 (void) mdb_snprintfrac(pct, MDB_NICENUM_BUFLEN, 3249 100 * zb->zb_asize, tzb->zb_asize, 2); 3250 3251 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 3252 "\t%5s\t%6s\t", 3253 csize, lsize, psize, asize, avg, comp, pct); 3254 3255 if (level == DN_MAX_LEVELS) 3256 mdb_printf("%s\n", typename); 3257 else 3258 mdb_printf(" L%d %s\n", 3259 level, typename); 3260 } 3261 } 3262 3263 return (DCMD_OK); 3264 } 3265 3266 typedef struct mdb_reference { 3267 uintptr_t ref_holder; 3268 uintptr_t ref_removed; 3269 uint64_t ref_number; 3270 } mdb_reference_t; 3271 3272 /* ARGSUSED */ 3273 static int 3274 reference_cb(uintptr_t addr, const void *ignored, void *arg) 3275 { 3276 mdb_reference_t ref; 3277 boolean_t holder_is_str = B_FALSE; 3278 char holder_str[128]; 3279 boolean_t removed = (boolean_t)arg; 3280 3281 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr, 3282 0) == -1) 3283 return (DCMD_ERR); 3284 3285 if (mdb_readstr(holder_str, sizeof (holder_str), 3286 ref.ref_holder) != -1) 3287 holder_is_str = strisprint(holder_str); 3288 3289 if (removed) 3290 mdb_printf("removed "); 3291 mdb_printf("reference "); 3292 if (ref.ref_number != 1) 3293 mdb_printf("with count=%llu ", ref.ref_number); 3294 mdb_printf("with tag %lx", ref.ref_holder); 3295 if (holder_is_str) 3296 mdb_printf(" \"%s\"", holder_str); 3297 mdb_printf(", held at:\n"); 3298 3299 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 3300 3301 if (removed) { 3302 mdb_printf("removed at:\n"); 3303 (void) mdb_call_dcmd("whatis", ref.ref_removed, 3304 DCMD_ADDRSPEC, 0, NULL); 3305 } 3306 3307 mdb_printf("\n"); 3308 3309 return (WALK_NEXT); 3310 } 3311 3312 typedef struct mdb_zfs_refcount { 3313 uint64_t rc_count; 3314 } mdb_zfs_refcount_t; 3315 3316 typedef struct mdb_zfs_refcount_removed { 3317 uint64_t rc_removed_count; 3318 } mdb_zfs_refcount_removed_t; 3319 3320 typedef struct mdb_zfs_refcount_tracked { 3321 boolean_t rc_tracked; 3322 } mdb_zfs_refcount_tracked_t; 3323 3324 /* ARGSUSED */ 3325 static int 3326 zfs_refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3327 { 3328 mdb_zfs_refcount_t rc; 3329 mdb_zfs_refcount_removed_t rcr; 3330 mdb_zfs_refcount_tracked_t rct; 3331 int off; 3332 boolean_t released = B_FALSE; 3333 3334 if (!(flags & DCMD_ADDRSPEC)) 3335 return (DCMD_USAGE); 3336 3337 if (mdb_getopts(argc, argv, 3338 'r', MDB_OPT_SETBITS, B_TRUE, &released, 3339 NULL) != argc) 3340 return (DCMD_USAGE); 3341 3342 if (mdb_ctf_vread(&rc, "zfs_refcount_t", "mdb_zfs_refcount_t", addr, 3343 0) == -1) 3344 return (DCMD_ERR); 3345 3346 if (mdb_ctf_vread(&rcr, "zfs_refcount_t", "mdb_zfs_refcount_removed_t", 3347 addr, MDB_CTF_VREAD_QUIET) == -1) { 3348 mdb_printf("zfs_refcount_t at %p has %llu holds (untracked)\n", 3349 addr, (longlong_t)rc.rc_count); 3350 return (DCMD_OK); 3351 } 3352 3353 if (mdb_ctf_vread(&rct, "zfs_refcount_t", "mdb_zfs_refcount_tracked_t", 3354 addr, MDB_CTF_VREAD_QUIET) == -1) { 3355 /* If this is an old target, it might be tracked. */ 3356 rct.rc_tracked = B_TRUE; 3357 } 3358 3359 mdb_printf("zfs_refcount_t at %p has %llu current holds, " 3360 "%llu recently released holds\n", 3361 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count); 3362 3363 if (rct.rc_tracked && rc.rc_count > 0) 3364 mdb_printf("current holds:\n"); 3365 off = mdb_ctf_offsetof_by_name("zfs_refcount_t", "rc_list"); 3366 if (off == -1) 3367 return (DCMD_ERR); 3368 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 3369 3370 if (released && rcr.rc_removed_count > 0) { 3371 mdb_printf("released holds:\n"); 3372 3373 off = mdb_ctf_offsetof_by_name("zfs_refcount_t", "rc_removed"); 3374 if (off == -1) 3375 return (DCMD_ERR); 3376 mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off); 3377 } 3378 3379 return (DCMD_OK); 3380 } 3381 3382 /* ARGSUSED */ 3383 static int 3384 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3385 { 3386 sa_attr_table_t *table; 3387 sa_os_t sa_os; 3388 char *name; 3389 int i; 3390 3391 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 3392 mdb_warn("failed to read sa_os at %p", addr); 3393 return (DCMD_ERR); 3394 } 3395 3396 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 3397 UM_SLEEP | UM_GC); 3398 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 3399 3400 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 3401 (uintptr_t)sa_os.sa_attr_table) == -1) { 3402 mdb_warn("failed to read sa_os at %p", addr); 3403 return (DCMD_ERR); 3404 } 3405 3406 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 3407 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 3408 for (i = 0; i != sa_os.sa_num_attrs; i++) { 3409 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 3410 mdb_printf("%5x %8x %8x %8x %-s\n", 3411 (int)table[i].sa_attr, (int)table[i].sa_registered, 3412 (int)table[i].sa_length, table[i].sa_byteswap, name); 3413 } 3414 3415 return (DCMD_OK); 3416 } 3417 3418 static int 3419 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 3420 { 3421 uintptr_t idx_table; 3422 3423 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { 3424 mdb_printf("can't find offset table in sa_idx_tab\n"); 3425 return (-1); 3426 } 3427 3428 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 3429 UM_SLEEP | UM_GC); 3430 3431 if (mdb_vread(*off_tab, 3432 attr_count * sizeof (uint32_t), idx_table) == -1) { 3433 mdb_warn("failed to attribute offset table %p", idx_table); 3434 return (-1); 3435 } 3436 3437 return (DCMD_OK); 3438 } 3439 3440 /*ARGSUSED*/ 3441 static int 3442 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3443 { 3444 uint32_t *offset_tab; 3445 int attr_count; 3446 uint64_t attr_id; 3447 uintptr_t attr_addr; 3448 uintptr_t bonus_tab, spill_tab; 3449 uintptr_t db_bonus, db_spill; 3450 uintptr_t os, os_sa; 3451 uintptr_t db_data; 3452 3453 if (argc != 1) 3454 return (DCMD_USAGE); 3455 3456 if (argv[0].a_type == MDB_TYPE_STRING) 3457 attr_id = mdb_strtoull(argv[0].a_un.a_str); 3458 else 3459 return (DCMD_USAGE); 3460 3461 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || 3462 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || 3463 GETMEMB(addr, "sa_handle", sa_os, os) || 3464 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || 3465 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { 3466 mdb_printf("Can't find necessary information in sa_handle " 3467 "in sa_handle\n"); 3468 return (DCMD_ERR); 3469 } 3470 3471 if (GETMEMB(os, "objset", os_sa, os_sa)) { 3472 mdb_printf("Can't find os_sa in objset\n"); 3473 return (DCMD_ERR); 3474 } 3475 3476 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { 3477 mdb_printf("Can't find sa_num_attrs\n"); 3478 return (DCMD_ERR); 3479 } 3480 3481 if (attr_id > attr_count) { 3482 mdb_printf("attribute id number is out of range\n"); 3483 return (DCMD_ERR); 3484 } 3485 3486 if (bonus_tab) { 3487 if (sa_get_off_table(bonus_tab, &offset_tab, 3488 attr_count) == -1) { 3489 return (DCMD_ERR); 3490 } 3491 3492 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { 3493 mdb_printf("can't find db_data in bonus dbuf\n"); 3494 return (DCMD_ERR); 3495 } 3496 } 3497 3498 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 3499 spill_tab == 0) { 3500 mdb_printf("Attribute does not exist\n"); 3501 return (DCMD_ERR); 3502 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 3503 if (sa_get_off_table(spill_tab, &offset_tab, 3504 attr_count) == -1) { 3505 return (DCMD_ERR); 3506 } 3507 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { 3508 mdb_printf("can't find db_data in spill dbuf\n"); 3509 return (DCMD_ERR); 3510 } 3511 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 3512 mdb_printf("Attribute does not exist\n"); 3513 return (DCMD_ERR); 3514 } 3515 } 3516 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 3517 mdb_printf("%p\n", attr_addr); 3518 return (DCMD_OK); 3519 } 3520 3521 /* ARGSUSED */ 3522 static int 3523 zfs_ace_print_common(uintptr_t addr, uint_t flags, 3524 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 3525 uint16_t ace_type, int verbose) 3526 { 3527 if (DCMD_HDRSPEC(flags) && !verbose) 3528 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 3529 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 3530 3531 if (!verbose) { 3532 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 3533 ace_flags, access_mask, ace_type, id); 3534 return (DCMD_OK); 3535 } 3536 3537 switch (ace_flags & ACE_TYPE_FLAGS) { 3538 case ACE_OWNER: 3539 mdb_printf("owner@:"); 3540 break; 3541 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 3542 mdb_printf("group@:"); 3543 break; 3544 case ACE_EVERYONE: 3545 mdb_printf("everyone@:"); 3546 break; 3547 case ACE_IDENTIFIER_GROUP: 3548 mdb_printf("group:%llx:", (u_longlong_t)id); 3549 break; 3550 case 0: /* User entry */ 3551 mdb_printf("user:%llx:", (u_longlong_t)id); 3552 break; 3553 } 3554 3555 /* print out permission mask */ 3556 if (access_mask & ACE_READ_DATA) 3557 mdb_printf("r"); 3558 else 3559 mdb_printf("-"); 3560 if (access_mask & ACE_WRITE_DATA) 3561 mdb_printf("w"); 3562 else 3563 mdb_printf("-"); 3564 if (access_mask & ACE_EXECUTE) 3565 mdb_printf("x"); 3566 else 3567 mdb_printf("-"); 3568 if (access_mask & ACE_APPEND_DATA) 3569 mdb_printf("p"); 3570 else 3571 mdb_printf("-"); 3572 if (access_mask & ACE_DELETE) 3573 mdb_printf("d"); 3574 else 3575 mdb_printf("-"); 3576 if (access_mask & ACE_DELETE_CHILD) 3577 mdb_printf("D"); 3578 else 3579 mdb_printf("-"); 3580 if (access_mask & ACE_READ_ATTRIBUTES) 3581 mdb_printf("a"); 3582 else 3583 mdb_printf("-"); 3584 if (access_mask & ACE_WRITE_ATTRIBUTES) 3585 mdb_printf("A"); 3586 else 3587 mdb_printf("-"); 3588 if (access_mask & ACE_READ_NAMED_ATTRS) 3589 mdb_printf("R"); 3590 else 3591 mdb_printf("-"); 3592 if (access_mask & ACE_WRITE_NAMED_ATTRS) 3593 mdb_printf("W"); 3594 else 3595 mdb_printf("-"); 3596 if (access_mask & ACE_READ_ACL) 3597 mdb_printf("c"); 3598 else 3599 mdb_printf("-"); 3600 if (access_mask & ACE_WRITE_ACL) 3601 mdb_printf("C"); 3602 else 3603 mdb_printf("-"); 3604 if (access_mask & ACE_WRITE_OWNER) 3605 mdb_printf("o"); 3606 else 3607 mdb_printf("-"); 3608 if (access_mask & ACE_SYNCHRONIZE) 3609 mdb_printf("s"); 3610 else 3611 mdb_printf("-"); 3612 3613 mdb_printf(":"); 3614 3615 /* Print out inheritance flags */ 3616 if (ace_flags & ACE_FILE_INHERIT_ACE) 3617 mdb_printf("f"); 3618 else 3619 mdb_printf("-"); 3620 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 3621 mdb_printf("d"); 3622 else 3623 mdb_printf("-"); 3624 if (ace_flags & ACE_INHERIT_ONLY_ACE) 3625 mdb_printf("i"); 3626 else 3627 mdb_printf("-"); 3628 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 3629 mdb_printf("n"); 3630 else 3631 mdb_printf("-"); 3632 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 3633 mdb_printf("S"); 3634 else 3635 mdb_printf("-"); 3636 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 3637 mdb_printf("F"); 3638 else 3639 mdb_printf("-"); 3640 if (ace_flags & ACE_INHERITED_ACE) 3641 mdb_printf("I"); 3642 else 3643 mdb_printf("-"); 3644 3645 switch (ace_type) { 3646 case ACE_ACCESS_ALLOWED_ACE_TYPE: 3647 mdb_printf(":allow\n"); 3648 break; 3649 case ACE_ACCESS_DENIED_ACE_TYPE: 3650 mdb_printf(":deny\n"); 3651 break; 3652 case ACE_SYSTEM_AUDIT_ACE_TYPE: 3653 mdb_printf(":audit\n"); 3654 break; 3655 case ACE_SYSTEM_ALARM_ACE_TYPE: 3656 mdb_printf(":alarm\n"); 3657 break; 3658 default: 3659 mdb_printf(":?\n"); 3660 } 3661 return (DCMD_OK); 3662 } 3663 3664 /* ARGSUSED */ 3665 static int 3666 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3667 { 3668 zfs_ace_t zace; 3669 int verbose = FALSE; 3670 uint64_t id; 3671 3672 if (!(flags & DCMD_ADDRSPEC)) 3673 return (DCMD_USAGE); 3674 3675 if (mdb_getopts(argc, argv, 3676 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3677 return (DCMD_USAGE); 3678 3679 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 3680 mdb_warn("failed to read zfs_ace_t"); 3681 return (DCMD_ERR); 3682 } 3683 3684 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 3685 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 3686 id = zace.z_fuid; 3687 else 3688 id = -1; 3689 3690 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 3691 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 3692 } 3693 3694 /* ARGSUSED */ 3695 static int 3696 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3697 { 3698 ace_t ace; 3699 uint64_t id; 3700 int verbose = FALSE; 3701 3702 if (!(flags & DCMD_ADDRSPEC)) 3703 return (DCMD_USAGE); 3704 3705 if (mdb_getopts(argc, argv, 3706 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3707 return (DCMD_USAGE); 3708 3709 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 3710 mdb_warn("failed to read ace_t"); 3711 return (DCMD_ERR); 3712 } 3713 3714 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 3715 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 3716 id = ace.a_who; 3717 else 3718 id = -1; 3719 3720 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 3721 ace.a_flags, ace.a_type, verbose)); 3722 } 3723 3724 typedef struct acl_dump_args { 3725 int a_argc; 3726 const mdb_arg_t *a_argv; 3727 uint16_t a_version; 3728 int a_flags; 3729 } acl_dump_args_t; 3730 3731 /* ARGSUSED */ 3732 static int 3733 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 3734 { 3735 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 3736 3737 if (acl_args->a_version == 1) { 3738 if (mdb_call_dcmd("zfs_ace", addr, 3739 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 3740 acl_args->a_argv) != DCMD_OK) { 3741 return (WALK_ERR); 3742 } 3743 } else { 3744 if (mdb_call_dcmd("zfs_ace0", addr, 3745 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 3746 acl_args->a_argv) != DCMD_OK) { 3747 return (WALK_ERR); 3748 } 3749 } 3750 acl_args->a_flags = DCMD_LOOP; 3751 return (WALK_NEXT); 3752 } 3753 3754 /* ARGSUSED */ 3755 static int 3756 acl_cb(uintptr_t addr, const void *unknown, void *arg) 3757 { 3758 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 3759 3760 if (acl_args->a_version == 1) { 3761 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 3762 arg, addr) != 0) { 3763 mdb_warn("can't walk ACEs"); 3764 return (DCMD_ERR); 3765 } 3766 } else { 3767 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 3768 arg, addr) != 0) { 3769 mdb_warn("can't walk ACEs"); 3770 return (DCMD_ERR); 3771 } 3772 } 3773 return (WALK_NEXT); 3774 } 3775 3776 /* ARGSUSED */ 3777 static int 3778 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3779 { 3780 zfs_acl_t zacl; 3781 int verbose = FALSE; 3782 acl_dump_args_t acl_args; 3783 3784 if (!(flags & DCMD_ADDRSPEC)) 3785 return (DCMD_USAGE); 3786 3787 if (mdb_getopts(argc, argv, 3788 'v', MDB_OPT_SETBITS, TRUE, &verbose, NULL) != argc) 3789 return (DCMD_USAGE); 3790 3791 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 3792 mdb_warn("failed to read zfs_acl_t"); 3793 return (DCMD_ERR); 3794 } 3795 3796 acl_args.a_argc = argc; 3797 acl_args.a_argv = argv; 3798 acl_args.a_version = zacl.z_version; 3799 acl_args.a_flags = DCMD_LOOPFIRST; 3800 3801 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 3802 mdb_warn("can't walk ACL"); 3803 return (DCMD_ERR); 3804 } 3805 3806 return (DCMD_OK); 3807 } 3808 3809 /* ARGSUSED */ 3810 static int 3811 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 3812 { 3813 if (wsp->walk_addr == 0) { 3814 mdb_warn("must supply address of zfs_acl_node_t\n"); 3815 return (WALK_ERR); 3816 } 3817 3818 wsp->walk_addr += 3819 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); 3820 3821 if (mdb_layered_walk("list", wsp) == -1) { 3822 mdb_warn("failed to walk 'list'\n"); 3823 return (WALK_ERR); 3824 } 3825 3826 return (WALK_NEXT); 3827 } 3828 3829 static int 3830 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 3831 { 3832 zfs_acl_node_t aclnode; 3833 3834 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 3835 wsp->walk_addr) == -1) { 3836 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 3837 return (WALK_ERR); 3838 } 3839 3840 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 3841 } 3842 3843 typedef struct ace_walk_data { 3844 int ace_count; 3845 int ace_version; 3846 } ace_walk_data_t; 3847 3848 static int 3849 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 3850 int ace_count, uintptr_t ace_data) 3851 { 3852 ace_walk_data_t *ace_walk_data; 3853 3854 if (wsp->walk_addr == 0) { 3855 mdb_warn("must supply address of zfs_acl_node_t\n"); 3856 return (WALK_ERR); 3857 } 3858 3859 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 3860 3861 ace_walk_data->ace_count = ace_count; 3862 ace_walk_data->ace_version = version; 3863 3864 wsp->walk_addr = ace_data; 3865 wsp->walk_data = ace_walk_data; 3866 3867 return (WALK_NEXT); 3868 } 3869 3870 static int 3871 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 3872 { 3873 static int gotid; 3874 static mdb_ctf_id_t acl_id; 3875 int z_ace_count; 3876 uintptr_t z_acldata; 3877 3878 if (!gotid) { 3879 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 3880 &acl_id) == -1) { 3881 mdb_warn("couldn't find struct zfs_acl_node"); 3882 return (DCMD_ERR); 3883 } 3884 gotid = TRUE; 3885 } 3886 3887 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 3888 return (DCMD_ERR); 3889 } 3890 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 3891 return (DCMD_ERR); 3892 } 3893 3894 return (zfs_aces_walk_init_common(wsp, version, 3895 z_ace_count, z_acldata)); 3896 } 3897 3898 /* ARGSUSED */ 3899 static int 3900 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 3901 { 3902 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 3903 } 3904 3905 /* ARGSUSED */ 3906 static int 3907 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 3908 { 3909 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 3910 } 3911 3912 static int 3913 zfs_aces_walk_step(mdb_walk_state_t *wsp) 3914 { 3915 ace_walk_data_t *ace_data = wsp->walk_data; 3916 zfs_ace_t zace; 3917 ace_t *acep; 3918 int status; 3919 int entry_type; 3920 int allow_type; 3921 uintptr_t ptr; 3922 3923 if (ace_data->ace_count == 0) 3924 return (WALK_DONE); 3925 3926 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 3927 mdb_warn("failed to read zfs_ace_t at %#lx", 3928 wsp->walk_addr); 3929 return (WALK_ERR); 3930 } 3931 3932 switch (ace_data->ace_version) { 3933 case 0: 3934 acep = (ace_t *)&zace; 3935 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 3936 allow_type = acep->a_type; 3937 break; 3938 case 1: 3939 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 3940 allow_type = zace.z_hdr.z_type; 3941 break; 3942 default: 3943 return (WALK_ERR); 3944 } 3945 3946 ptr = (uintptr_t)wsp->walk_addr; 3947 switch (entry_type) { 3948 case ACE_OWNER: 3949 case ACE_EVERYONE: 3950 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 3951 ptr += ace_data->ace_version == 0 ? 3952 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 3953 break; 3954 case ACE_IDENTIFIER_GROUP: 3955 default: 3956 switch (allow_type) { 3957 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 3958 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 3959 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 3960 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 3961 ptr += ace_data->ace_version == 0 ? 3962 sizeof (ace_t) : sizeof (zfs_object_ace_t); 3963 break; 3964 default: 3965 ptr += ace_data->ace_version == 0 ? 3966 sizeof (ace_t) : sizeof (zfs_ace_t); 3967 break; 3968 } 3969 } 3970 3971 ace_data->ace_count--; 3972 status = wsp->walk_callback(wsp->walk_addr, 3973 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 3974 3975 wsp->walk_addr = ptr; 3976 return (status); 3977 } 3978 3979 typedef struct mdb_zfs_rrwlock { 3980 uintptr_t rr_writer; 3981 boolean_t rr_writer_wanted; 3982 } mdb_zfs_rrwlock_t; 3983 3984 static uint_t rrw_key; 3985 3986 /* ARGSUSED */ 3987 static int 3988 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3989 { 3990 mdb_zfs_rrwlock_t rrw; 3991 3992 if (rrw_key == 0) { 3993 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) 3994 return (DCMD_ERR); 3995 } 3996 3997 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 3998 0) == -1) 3999 return (DCMD_ERR); 4000 4001 if (rrw.rr_writer != 0) { 4002 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer); 4003 return (DCMD_OK); 4004 } 4005 4006 if (rrw.rr_writer_wanted) { 4007 mdb_printf("writer wanted\n"); 4008 } 4009 4010 mdb_printf("anonymous references:\n"); 4011 (void) mdb_call_dcmd("zfs_refcount", addr + 4012 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), 4013 DCMD_ADDRSPEC, 0, NULL); 4014 4015 mdb_printf("linked references:\n"); 4016 (void) mdb_call_dcmd("zfs_refcount", addr + 4017 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), 4018 DCMD_ADDRSPEC, 0, NULL); 4019 4020 /* 4021 * XXX This should find references from 4022 * "::walk thread | ::tsd -v <rrw_key>", but there is no support 4023 * for programmatic consumption of dcmds, so this would be 4024 * difficult, potentially requiring reimplementing ::tsd (both 4025 * user and kernel versions) in this MDB module. 4026 */ 4027 4028 return (DCMD_OK); 4029 } 4030 4031 typedef struct mdb_arc_buf_hdr_t { 4032 uint16_t b_psize; 4033 uint16_t b_lsize; 4034 struct { 4035 uint32_t b_bufcnt; 4036 uintptr_t b_state; 4037 } b_l1hdr; 4038 } mdb_arc_buf_hdr_t; 4039 4040 enum arc_cflags { 4041 ARC_CFLAG_VERBOSE = 1 << 0, 4042 ARC_CFLAG_ANON = 1 << 1, 4043 ARC_CFLAG_MRU = 1 << 2, 4044 ARC_CFLAG_MFU = 1 << 3, 4045 ARC_CFLAG_BUFS = 1 << 4, 4046 }; 4047 4048 typedef struct arc_compression_stats_data { 4049 GElf_Sym anon_sym; /* ARC_anon symbol */ 4050 GElf_Sym mru_sym; /* ARC_mru symbol */ 4051 GElf_Sym mrug_sym; /* ARC_mru_ghost symbol */ 4052 GElf_Sym mfu_sym; /* ARC_mfu symbol */ 4053 GElf_Sym mfug_sym; /* ARC_mfu_ghost symbol */ 4054 GElf_Sym l2c_sym; /* ARC_l2c_only symbol */ 4055 uint64_t *anon_c_hist; /* histogram of compressed sizes in anon */ 4056 uint64_t *anon_u_hist; /* histogram of uncompressed sizes in anon */ 4057 uint64_t *anon_bufs; /* histogram of buffer counts in anon state */ 4058 uint64_t *mru_c_hist; /* histogram of compressed sizes in mru */ 4059 uint64_t *mru_u_hist; /* histogram of uncompressed sizes in mru */ 4060 uint64_t *mru_bufs; /* histogram of buffer counts in mru */ 4061 uint64_t *mfu_c_hist; /* histogram of compressed sizes in mfu */ 4062 uint64_t *mfu_u_hist; /* histogram of uncompressed sizes in mfu */ 4063 uint64_t *mfu_bufs; /* histogram of buffer counts in mfu */ 4064 uint64_t *all_c_hist; /* histogram of compressed anon + mru + mfu */ 4065 uint64_t *all_u_hist; /* histogram of uncompressed anon + mru + mfu */ 4066 uint64_t *all_bufs; /* histogram of buffer counts in all states */ 4067 int arc_cflags; /* arc compression flags, specified by user */ 4068 int hist_nbuckets; /* number of buckets in each histogram */ 4069 4070 ulong_t l1hdr_off; /* offset of b_l1hdr in arc_buf_hdr_t */ 4071 } arc_compression_stats_data_t; 4072 4073 int 4074 highbit64(uint64_t i) 4075 { 4076 int h = 1; 4077 4078 if (i == 0) 4079 return (0); 4080 if (i & 0xffffffff00000000ULL) { 4081 h += 32; i >>= 32; 4082 } 4083 if (i & 0xffff0000) { 4084 h += 16; i >>= 16; 4085 } 4086 if (i & 0xff00) { 4087 h += 8; i >>= 8; 4088 } 4089 if (i & 0xf0) { 4090 h += 4; i >>= 4; 4091 } 4092 if (i & 0xc) { 4093 h += 2; i >>= 2; 4094 } 4095 if (i & 0x2) { 4096 h += 1; 4097 } 4098 return (h); 4099 } 4100 4101 /* ARGSUSED */ 4102 static int 4103 arc_compression_stats_cb(uintptr_t addr, const void *unknown, void *arg) 4104 { 4105 arc_compression_stats_data_t *data = arg; 4106 arc_flags_t flags; 4107 mdb_arc_buf_hdr_t hdr; 4108 int cbucket, ubucket, bufcnt; 4109 4110 /* 4111 * mdb_ctf_vread() uses the sizeof the target type (e.g. 4112 * sizeof (arc_buf_hdr_t) in the target) to read in the entire contents 4113 * of the target type into a buffer and then copy the values of the 4114 * desired members from the mdb typename (e.g. mdb_arc_buf_hdr_t) from 4115 * this buffer. Unfortunately, the way arc_buf_hdr_t is used by zfs, 4116 * the actual size allocated by the kernel for arc_buf_hdr_t is often 4117 * smaller than `sizeof (arc_buf_hdr_t)` (see the definitions of 4118 * l1arc_buf_hdr_t and arc_buf_hdr_t in 4119 * usr/src/uts/common/fs/zfs/arc.c). Attempting to read the entire 4120 * contents of arc_buf_hdr_t from the target (as mdb_ctf_vread() does) 4121 * can cause an error if the allocated size is indeed smaller--it's 4122 * possible that the 'missing' trailing members of arc_buf_hdr_t 4123 * (l1arc_buf_hdr_t and/or arc_buf_hdr_crypt_t) may fall into unmapped 4124 * memory. 4125 * 4126 * We use the GETMEMB macro instead which performs an mdb_vread() 4127 * but only reads enough of the target to retrieve the desired struct 4128 * member instead of the entire struct. 4129 */ 4130 if (GETMEMB(addr, "arc_buf_hdr", b_flags, flags) == -1) 4131 return (WALK_ERR); 4132 4133 /* 4134 * We only count headers that have data loaded in the kernel. 4135 * This means an L1 header must be present as well as the data 4136 * that corresponds to the L1 header. If there's no L1 header, 4137 * we can skip the arc_buf_hdr_t completely. If it's present, we 4138 * must look at the ARC state (b_l1hdr.b_state) to determine if 4139 * the data is present. 4140 */ 4141 if ((flags & ARC_FLAG_HAS_L1HDR) == 0) 4142 return (WALK_NEXT); 4143 4144 if (GETMEMB(addr, "arc_buf_hdr", b_psize, hdr.b_psize) == -1 || 4145 GETMEMB(addr, "arc_buf_hdr", b_lsize, hdr.b_lsize) == -1 || 4146 GETMEMB(addr + data->l1hdr_off, "l1arc_buf_hdr", b_bufcnt, 4147 hdr.b_l1hdr.b_bufcnt) == -1 || 4148 GETMEMB(addr + data->l1hdr_off, "l1arc_buf_hdr", b_state, 4149 hdr.b_l1hdr.b_state) == -1) 4150 return (WALK_ERR); 4151 4152 /* 4153 * Headers in the ghost states, or the l2c_only state don't have 4154 * arc buffers linked off of them. Thus, their compressed size 4155 * is meaningless, so we skip these from the stats. 4156 */ 4157 if (hdr.b_l1hdr.b_state == data->mrug_sym.st_value || 4158 hdr.b_l1hdr.b_state == data->mfug_sym.st_value || 4159 hdr.b_l1hdr.b_state == data->l2c_sym.st_value) { 4160 return (WALK_NEXT); 4161 } 4162 4163 /* 4164 * The physical size (compressed) and logical size 4165 * (uncompressed) are in units of SPA_MINBLOCKSIZE. By default, 4166 * we use the log2 of this value (rounded down to the nearest 4167 * integer) to determine the bucket to assign this header to. 4168 * Thus, the histogram is logarithmic with respect to the size 4169 * of the header. For example, the following is a mapping of the 4170 * bucket numbers and the range of header sizes they correspond to: 4171 * 4172 * 0: 0 byte headers 4173 * 1: 512 byte headers 4174 * 2: [1024 - 2048) byte headers 4175 * 3: [2048 - 4096) byte headers 4176 * 4: [4096 - 8192) byte headers 4177 * 5: [8192 - 16394) byte headers 4178 * 6: [16384 - 32768) byte headers 4179 * 7: [32768 - 65536) byte headers 4180 * 8: [65536 - 131072) byte headers 4181 * 9: 131072 byte headers 4182 * 4183 * If the ARC_CFLAG_VERBOSE flag was specified, we use the 4184 * physical and logical sizes directly. Thus, the histogram will 4185 * no longer be logarithmic; instead it will be linear with 4186 * respect to the size of the header. The following is a mapping 4187 * of the first many bucket numbers and the header size they 4188 * correspond to: 4189 * 4190 * 0: 0 byte headers 4191 * 1: 512 byte headers 4192 * 2: 1024 byte headers 4193 * 3: 1536 byte headers 4194 * 4: 2048 byte headers 4195 * 5: 2560 byte headers 4196 * 6: 3072 byte headers 4197 * 4198 * And so on. Keep in mind that a range of sizes isn't used in 4199 * the case of linear scale because the headers can only 4200 * increment or decrement in sizes of 512 bytes. So, it's not 4201 * possible for a header to be sized in between whats listed 4202 * above. 4203 * 4204 * Also, the above mapping values were calculated assuming a 4205 * SPA_MINBLOCKSHIFT of 512 bytes and a SPA_MAXBLOCKSIZE of 128K. 4206 */ 4207 4208 if (data->arc_cflags & ARC_CFLAG_VERBOSE) { 4209 cbucket = hdr.b_psize; 4210 ubucket = hdr.b_lsize; 4211 } else { 4212 cbucket = highbit64(hdr.b_psize); 4213 ubucket = highbit64(hdr.b_lsize); 4214 } 4215 4216 bufcnt = hdr.b_l1hdr.b_bufcnt; 4217 if (bufcnt >= data->hist_nbuckets) 4218 bufcnt = data->hist_nbuckets - 1; 4219 4220 /* Ensure we stay within the bounds of the histogram array */ 4221 ASSERT3U(cbucket, <, data->hist_nbuckets); 4222 ASSERT3U(ubucket, <, data->hist_nbuckets); 4223 4224 if (hdr.b_l1hdr.b_state == data->anon_sym.st_value) { 4225 data->anon_c_hist[cbucket]++; 4226 data->anon_u_hist[ubucket]++; 4227 data->anon_bufs[bufcnt]++; 4228 } else if (hdr.b_l1hdr.b_state == data->mru_sym.st_value) { 4229 data->mru_c_hist[cbucket]++; 4230 data->mru_u_hist[ubucket]++; 4231 data->mru_bufs[bufcnt]++; 4232 } else if (hdr.b_l1hdr.b_state == data->mfu_sym.st_value) { 4233 data->mfu_c_hist[cbucket]++; 4234 data->mfu_u_hist[ubucket]++; 4235 data->mfu_bufs[bufcnt]++; 4236 } 4237 4238 data->all_c_hist[cbucket]++; 4239 data->all_u_hist[ubucket]++; 4240 data->all_bufs[bufcnt]++; 4241 4242 return (WALK_NEXT); 4243 } 4244 4245 /* ARGSUSED */ 4246 static int 4247 arc_compression_stats(uintptr_t addr, uint_t flags, int argc, 4248 const mdb_arg_t *argv) 4249 { 4250 arc_compression_stats_data_t data = { 0 }; 4251 unsigned int max_shifted = SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; 4252 unsigned int hist_size; 4253 char range[32]; 4254 int rc = DCMD_OK; 4255 int off; 4256 4257 if (mdb_getopts(argc, argv, 4258 'v', MDB_OPT_SETBITS, ARC_CFLAG_VERBOSE, &data.arc_cflags, 4259 'a', MDB_OPT_SETBITS, ARC_CFLAG_ANON, &data.arc_cflags, 4260 'b', MDB_OPT_SETBITS, ARC_CFLAG_BUFS, &data.arc_cflags, 4261 'r', MDB_OPT_SETBITS, ARC_CFLAG_MRU, &data.arc_cflags, 4262 'f', MDB_OPT_SETBITS, ARC_CFLAG_MFU, &data.arc_cflags, 4263 NULL) != argc) 4264 return (DCMD_USAGE); 4265 4266 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_anon", &data.anon_sym) || 4267 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru", &data.mru_sym) || 4268 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru_ghost", &data.mrug_sym) || 4269 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu", &data.mfu_sym) || 4270 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu_ghost", &data.mfug_sym) || 4271 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_l2c_only", &data.l2c_sym)) { 4272 mdb_warn("can't find arc state symbol"); 4273 return (DCMD_ERR); 4274 } 4275 4276 /* 4277 * Determine the maximum expected size for any header, and use 4278 * this to determine the number of buckets needed for each 4279 * histogram. If ARC_CFLAG_VERBOSE is specified, this value is 4280 * used directly; otherwise the log2 of the maximum size is 4281 * used. Thus, if using a log2 scale there's a maximum of 10 4282 * possible buckets, while the linear scale (when using 4283 * ARC_CFLAG_VERBOSE) has a maximum of 257 buckets. 4284 */ 4285 if (data.arc_cflags & ARC_CFLAG_VERBOSE) 4286 data.hist_nbuckets = max_shifted + 1; 4287 else 4288 data.hist_nbuckets = highbit64(max_shifted) + 1; 4289 4290 hist_size = sizeof (uint64_t) * data.hist_nbuckets; 4291 4292 data.anon_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 4293 data.anon_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4294 data.anon_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4295 4296 data.mru_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 4297 data.mru_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4298 data.mru_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4299 4300 data.mfu_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 4301 data.mfu_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4302 data.mfu_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4303 4304 data.all_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 4305 data.all_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4306 data.all_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4307 4308 if ((off = mdb_ctf_offsetof_by_name(ZFS_STRUCT "arc_buf_hdr", 4309 "b_l1hdr")) == -1) { 4310 mdb_warn("could not get offset of b_l1hdr from arc_buf_hdr_t"); 4311 rc = DCMD_ERR; 4312 goto out; 4313 } 4314 data.l1hdr_off = off; 4315 4316 if (mdb_walk("arc_buf_hdr_t_full", arc_compression_stats_cb, 4317 &data) != 0) { 4318 mdb_warn("can't walk arc_buf_hdr's"); 4319 rc = DCMD_ERR; 4320 goto out; 4321 } 4322 4323 if (data.arc_cflags & ARC_CFLAG_VERBOSE) { 4324 rc = mdb_snprintf(range, sizeof (range), 4325 "[n*%llu, (n+1)*%llu)", SPA_MINBLOCKSIZE, 4326 SPA_MINBLOCKSIZE); 4327 } else { 4328 rc = mdb_snprintf(range, sizeof (range), 4329 "[2^(n-1)*%llu, 2^n*%llu)", SPA_MINBLOCKSIZE, 4330 SPA_MINBLOCKSIZE); 4331 } 4332 4333 if (rc < 0) { 4334 /* snprintf failed, abort the dcmd */ 4335 rc = DCMD_ERR; 4336 goto out; 4337 } else { 4338 /* snprintf succeeded above, reset return code */ 4339 rc = DCMD_OK; 4340 } 4341 4342 if (data.arc_cflags & ARC_CFLAG_ANON) { 4343 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4344 mdb_printf("Histogram of the number of anon buffers " 4345 "that are associated with an arc hdr.\n"); 4346 dump_histogram(data.anon_bufs, data.hist_nbuckets, 0); 4347 mdb_printf("\n"); 4348 } 4349 mdb_printf("Histogram of compressed anon buffers.\n" 4350 "Each bucket represents buffers of size: %s.\n", range); 4351 dump_histogram(data.anon_c_hist, data.hist_nbuckets, 0); 4352 mdb_printf("\n"); 4353 4354 mdb_printf("Histogram of uncompressed anon buffers.\n" 4355 "Each bucket represents buffers of size: %s.\n", range); 4356 dump_histogram(data.anon_u_hist, data.hist_nbuckets, 0); 4357 mdb_printf("\n"); 4358 } 4359 4360 if (data.arc_cflags & ARC_CFLAG_MRU) { 4361 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4362 mdb_printf("Histogram of the number of mru buffers " 4363 "that are associated with an arc hdr.\n"); 4364 dump_histogram(data.mru_bufs, data.hist_nbuckets, 0); 4365 mdb_printf("\n"); 4366 } 4367 mdb_printf("Histogram of compressed mru buffers.\n" 4368 "Each bucket represents buffers of size: %s.\n", range); 4369 dump_histogram(data.mru_c_hist, data.hist_nbuckets, 0); 4370 mdb_printf("\n"); 4371 4372 mdb_printf("Histogram of uncompressed mru buffers.\n" 4373 "Each bucket represents buffers of size: %s.\n", range); 4374 dump_histogram(data.mru_u_hist, data.hist_nbuckets, 0); 4375 mdb_printf("\n"); 4376 } 4377 4378 if (data.arc_cflags & ARC_CFLAG_MFU) { 4379 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4380 mdb_printf("Histogram of the number of mfu buffers " 4381 "that are associated with an arc hdr.\n"); 4382 dump_histogram(data.mfu_bufs, data.hist_nbuckets, 0); 4383 mdb_printf("\n"); 4384 } 4385 4386 mdb_printf("Histogram of compressed mfu buffers.\n" 4387 "Each bucket represents buffers of size: %s.\n", range); 4388 dump_histogram(data.mfu_c_hist, data.hist_nbuckets, 0); 4389 mdb_printf("\n"); 4390 4391 mdb_printf("Histogram of uncompressed mfu buffers.\n" 4392 "Each bucket represents buffers of size: %s.\n", range); 4393 dump_histogram(data.mfu_u_hist, data.hist_nbuckets, 0); 4394 mdb_printf("\n"); 4395 } 4396 4397 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4398 mdb_printf("Histogram of all buffers that " 4399 "are associated with an arc hdr.\n"); 4400 dump_histogram(data.all_bufs, data.hist_nbuckets, 0); 4401 mdb_printf("\n"); 4402 } 4403 4404 mdb_printf("Histogram of all compressed buffers.\n" 4405 "Each bucket represents buffers of size: %s.\n", range); 4406 dump_histogram(data.all_c_hist, data.hist_nbuckets, 0); 4407 mdb_printf("\n"); 4408 4409 mdb_printf("Histogram of all uncompressed buffers.\n" 4410 "Each bucket represents buffers of size: %s.\n", range); 4411 dump_histogram(data.all_u_hist, data.hist_nbuckets, 0); 4412 4413 out: 4414 mdb_free(data.anon_c_hist, hist_size); 4415 mdb_free(data.anon_u_hist, hist_size); 4416 mdb_free(data.anon_bufs, hist_size); 4417 4418 mdb_free(data.mru_c_hist, hist_size); 4419 mdb_free(data.mru_u_hist, hist_size); 4420 mdb_free(data.mru_bufs, hist_size); 4421 4422 mdb_free(data.mfu_c_hist, hist_size); 4423 mdb_free(data.mfu_u_hist, hist_size); 4424 mdb_free(data.mfu_bufs, hist_size); 4425 4426 mdb_free(data.all_c_hist, hist_size); 4427 mdb_free(data.all_u_hist, hist_size); 4428 mdb_free(data.all_bufs, hist_size); 4429 4430 return (rc); 4431 } 4432 4433 typedef struct mdb_range_seg64 { 4434 uint64_t rs_start; 4435 uint64_t rs_end; 4436 } mdb_range_seg64_t; 4437 4438 typedef struct mdb_range_seg32 { 4439 uint32_t rs_start; 4440 uint32_t rs_end; 4441 } mdb_range_seg32_t; 4442 4443 /* ARGSUSED */ 4444 static int 4445 range_tree_cb(uintptr_t addr, const void *unknown, void *arg) 4446 { 4447 mdb_range_tree_t *rt = (mdb_range_tree_t *)arg; 4448 uint64_t start, end; 4449 4450 if (rt->rt_type == RANGE_SEG64) { 4451 mdb_range_seg64_t rs; 4452 4453 if (mdb_ctf_vread(&rs, ZFS_STRUCT "range_seg64", 4454 "mdb_range_seg64_t", addr, 0) == -1) 4455 return (DCMD_ERR); 4456 start = rs.rs_start; 4457 end = rs.rs_end; 4458 } else { 4459 ASSERT3U(rt->rt_type, ==, RANGE_SEG32); 4460 mdb_range_seg32_t rs; 4461 4462 if (mdb_ctf_vread(&rs, ZFS_STRUCT "range_seg32", 4463 "mdb_range_seg32_t", addr, 0) == -1) 4464 return (DCMD_ERR); 4465 start = ((uint64_t)rs.rs_start << rt->rt_shift) + rt->rt_start; 4466 end = ((uint64_t)rs.rs_end << rt->rt_shift) + rt->rt_start; 4467 } 4468 4469 mdb_printf("\t[%llx %llx) (length %llx)\n", start, end, end - start); 4470 4471 return (0); 4472 } 4473 4474 /* ARGSUSED */ 4475 static int 4476 range_tree(uintptr_t addr, uint_t flags, int argc, 4477 const mdb_arg_t *argv) 4478 { 4479 mdb_range_tree_t rt; 4480 uintptr_t btree_addr; 4481 4482 if (!(flags & DCMD_ADDRSPEC)) 4483 return (DCMD_USAGE); 4484 4485 if (mdb_ctf_vread(&rt, ZFS_STRUCT "range_tree", "mdb_range_tree_t", 4486 addr, 0) == -1) 4487 return (DCMD_ERR); 4488 4489 mdb_printf("%p: range tree of %llu entries, %llu bytes\n", 4490 addr, rt.rt_root.bt_num_elems, rt.rt_space); 4491 4492 btree_addr = addr + 4493 mdb_ctf_offsetof_by_name(ZFS_STRUCT "range_tree", "rt_root"); 4494 4495 if (mdb_pwalk("zfs_btree", range_tree_cb, &rt, btree_addr) != 0) { 4496 mdb_warn("can't walk range_tree segments"); 4497 return (DCMD_ERR); 4498 } 4499 return (DCMD_OK); 4500 } 4501 4502 typedef struct mdb_spa_log_sm { 4503 uint64_t sls_sm_obj; 4504 uint64_t sls_txg; 4505 uint64_t sls_nblocks; 4506 uint64_t sls_mscount; 4507 } mdb_spa_log_sm_t; 4508 4509 /* ARGSUSED */ 4510 static int 4511 logsm_stats_cb(uintptr_t addr, const void *unknown, void *arg) 4512 { 4513 mdb_spa_log_sm_t sls; 4514 if (mdb_ctf_vread(&sls, ZFS_STRUCT "spa_log_sm", "mdb_spa_log_sm_t", 4515 addr, 0) == -1) 4516 return (WALK_ERR); 4517 4518 mdb_printf("%7lld %7lld %7lld %7lld\n", 4519 sls.sls_txg, sls.sls_nblocks, sls.sls_mscount, sls.sls_sm_obj); 4520 4521 return (WALK_NEXT); 4522 } 4523 typedef struct mdb_log_summary_entry { 4524 uint64_t lse_start; 4525 uint64_t lse_blkcount; 4526 uint64_t lse_mscount; 4527 } mdb_log_summary_entry_t; 4528 4529 /* ARGSUSED */ 4530 static int 4531 logsm_summary_cb(uintptr_t addr, const void *unknown, void *arg) 4532 { 4533 mdb_log_summary_entry_t lse; 4534 if (mdb_ctf_vread(&lse, ZFS_STRUCT "log_summary_entry", 4535 "mdb_log_summary_entry_t", addr, 0) == -1) 4536 return (WALK_ERR); 4537 4538 mdb_printf("%7lld %7lld %7lld\n", 4539 lse.lse_start, lse.lse_blkcount, lse.lse_mscount); 4540 return (WALK_NEXT); 4541 } 4542 4543 /* ARGSUSED */ 4544 static int 4545 logsm_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 4546 { 4547 if (!(flags & DCMD_ADDRSPEC)) 4548 return (DCMD_USAGE); 4549 4550 uintptr_t sls_avl_addr = addr + 4551 mdb_ctf_offsetof_by_name(ZFS_STRUCT "spa", "spa_sm_logs_by_txg"); 4552 uintptr_t summary_addr = addr + 4553 mdb_ctf_offsetof_by_name(ZFS_STRUCT "spa", "spa_log_summary"); 4554 4555 mdb_printf("Log Entries:\n"); 4556 mdb_printf("%7s %7s %7s %7s\n", "txg", "blk", "ms", "obj"); 4557 if (mdb_pwalk("avl", logsm_stats_cb, NULL, sls_avl_addr) != 0) 4558 return (DCMD_ERR); 4559 4560 mdb_printf("\nSummary Entries:\n"); 4561 mdb_printf("%7s %7s %7s\n", "txg", "blk", "ms"); 4562 if (mdb_pwalk("list", logsm_summary_cb, NULL, summary_addr) != 0) 4563 return (DCMD_ERR); 4564 4565 return (DCMD_OK); 4566 } 4567 4568 /* 4569 * MDB module linkage information: 4570 * 4571 * We declare a list of structures describing our dcmds, and a function 4572 * named _mdb_init to return a pointer to our module information. 4573 */ 4574 4575 static const mdb_dcmd_t dcmds[] = { 4576 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 4577 { "blkptr", ":", "print blkptr_t", blkptr }, 4578 { "dva", ":", "print dva_t", dva }, 4579 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 4580 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 4581 { "dbufs", 4582 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 4583 "[-o object | \"mdn\"] \n" 4584 "\t[-l level] [-b blkid | \"bonus\"]", 4585 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 4586 { "abuf_find", "dva_word[0] dva_word[1]", 4587 "find arc_buf_hdr_t of a specified DVA", 4588 abuf_find }, 4589 { "logsm_stats", ":", "print log space map statistics of a spa_t", 4590 logsm_stats}, 4591 { "spa", "?[-cevmMh]\n" 4592 "\t-c display spa config\n" 4593 "\t-e display vdev statistics\n" 4594 "\t-v display vdev information\n" 4595 "\t-m display metaslab statistics\n" 4596 "\t-M display metaslab group statistics\n" 4597 "\t-h display histogram (requires -m or -M)\n", 4598 "spa_t summary", spa_print }, 4599 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 4600 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 4601 { "spa_vdevs", ":[-emMh]\n" 4602 "\t-e display vdev statistics\n" 4603 "\t-m dispaly metaslab statistics\n" 4604 "\t-M display metaslab group statistic\n" 4605 "\t-h display histogram (requires -m or -M)\n", 4606 "given a spa_t, print vdev summary", spa_vdevs }, 4607 { "sm_entries", "<buffer length in bytes>", 4608 "print out space map entries from a buffer decoded", 4609 sm_entries}, 4610 { "vdev", ":[-remMh]\n" 4611 "\t-r display recursively\n" 4612 "\t-e display statistics\n" 4613 "\t-m display metaslab statistics (top level vdev only)\n" 4614 "\t-M display metaslab group statistics (top level vdev only)\n" 4615 "\t-h display histogram (requires -m or -M)\n", 4616 "vdev_t summary", vdev_print }, 4617 { "zio", ":[-cpr]\n" 4618 "\t-c display children\n" 4619 "\t-p display parents\n" 4620 "\t-r display recursively", 4621 "zio_t summary", zio_print }, 4622 { "zio_state", "?", "print out all zio_t structures on system or " 4623 "for a particular pool", zio_state }, 4624 { "zfs_blkstats", ":[-v]", 4625 "given a spa_t, print block type stats from last scrub", 4626 zfs_blkstats }, 4627 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 4628 { "zfs_refcount", ":[-r]\n" 4629 "\t-r display recently removed references", 4630 "print zfs_refcount_t holders", zfs_refcount }, 4631 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 4632 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 4633 zfs_acl_dump }, 4634 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 4635 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 4636 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 4637 sa_attr_table}, 4638 { "sa_attr", ": attr_id", 4639 "print SA attribute address when given sa_handle_t", sa_attr_print}, 4640 { "zfs_dbgmsg", ":[-va]", 4641 "print zfs debug log", dbgmsg}, 4642 { "rrwlock", ":", 4643 "print rrwlock_t, including readers", rrwlock}, 4644 { "metaslab_weight", "weight", 4645 "print metaslab weight", metaslab_weight}, 4646 { "metaslab_trace", ":", 4647 "print metaslab allocation trace records", metaslab_trace}, 4648 { "arc_compression_stats", ":[-vabrf]\n" 4649 "\t-v verbose, display a linearly scaled histogram\n" 4650 "\t-a display ARC_anon state statistics individually\n" 4651 "\t-r display ARC_mru state statistics individually\n" 4652 "\t-f display ARC_mfu state statistics individually\n" 4653 "\t-b display histogram of buffer counts\n", 4654 "print a histogram of compressed arc buffer sizes", 4655 arc_compression_stats}, 4656 { "range_tree", ":", 4657 "print entries in range_tree_t", range_tree}, 4658 { NULL } 4659 }; 4660 4661 static const mdb_walker_t walkers[] = { 4662 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 4663 txg_list_walk_init, txg_list_walk_step, NULL }, 4664 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 4665 txg_list0_walk_init, txg_list_walk_step, NULL }, 4666 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 4667 txg_list1_walk_init, txg_list_walk_step, NULL }, 4668 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 4669 txg_list2_walk_init, txg_list_walk_step, NULL }, 4670 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 4671 txg_list3_walk_init, txg_list_walk_step, NULL }, 4672 { "zio", "walk all zio structures, optionally for a particular spa_t", 4673 zio_walk_init, zio_walk_step, NULL }, 4674 { "zio_root", 4675 "walk all root zio_t structures, optionally for a particular spa_t", 4676 zio_walk_init, zio_walk_root_step, NULL }, 4677 { "spa", "walk all spa_t entries in the namespace", 4678 spa_walk_init, spa_walk_step, NULL }, 4679 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 4680 metaslab_walk_init, metaslab_walk_step, NULL }, 4681 { "multilist", "given a multilist_t *, walk all list_t structures", 4682 multilist_walk_init, multilist_walk_step, NULL }, 4683 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 4684 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 4685 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 4686 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 4687 { "zfs_acl_node_aces0", 4688 "given a zfs_acl_node_t, walk all ACEs as ace_t", 4689 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 4690 { "zfs_btree", "given a zfs_btree_t *, walk all entries", 4691 btree_walk_init, btree_walk_step, btree_walk_fini }, 4692 { NULL } 4693 }; 4694 4695 static const mdb_modinfo_t modinfo = { 4696 MDB_API_VERSION, dcmds, walkers 4697 }; 4698 4699 const mdb_modinfo_t * 4700 _mdb_init(void) 4701 { 4702 return (&modinfo); 4703 } 4704