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_verbose_hr; 1083 boolean_t da_address; 1084 } dbgmsg_arg_t; 1085 1086 /* ARGSUSED */ 1087 static int 1088 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 1089 { 1090 static mdb_ctf_id_t id; 1091 static boolean_t gotid; 1092 static ulong_t off; 1093 1094 dbgmsg_arg_t *da = arg; 1095 time_t timestamp; 1096 hrtime_t hrtime; 1097 char buf[1024]; 1098 1099 if (!gotid) { 1100 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == 1101 -1) { 1102 mdb_warn("couldn't find struct zfs_dbgmsg"); 1103 return (WALK_ERR); 1104 } 1105 gotid = TRUE; 1106 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 1107 mdb_warn("couldn't find zdm_msg"); 1108 return (WALK_ERR); 1109 } 1110 off /= 8; 1111 } 1112 1113 1114 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 1115 return (WALK_ERR); 1116 } 1117 1118 if (da->da_verbose_hr) { 1119 if (GETMEMBID(addr, &id, zdm_hrtime, hrtime)) { 1120 return (WALK_ERR); 1121 } 1122 } 1123 1124 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 1125 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 1126 return (DCMD_ERR); 1127 } 1128 1129 if (da->da_address) 1130 mdb_printf("%p ", addr); 1131 if (da->da_verbose) 1132 mdb_printf("%Y ", timestamp); 1133 if (da->da_verbose_hr) 1134 mdb_printf("%016x ", hrtime); 1135 1136 mdb_printf("%s\n", buf); 1137 1138 if (da->da_verbose || da->da_verbose_hr) 1139 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 1140 1141 return (WALK_NEXT); 1142 } 1143 1144 /* ARGSUSED */ 1145 static int 1146 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1147 { 1148 GElf_Sym sym; 1149 dbgmsg_arg_t da = { 0 }; 1150 1151 if (mdb_getopts(argc, argv, 1152 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 1153 'r', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose_hr, 1154 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, 1155 NULL) != argc) 1156 return (DCMD_USAGE); 1157 1158 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { 1159 mdb_warn("can't find zfs_dbgmsgs"); 1160 return (DCMD_ERR); 1161 } 1162 1163 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { 1164 mdb_warn("can't walk zfs_dbgmsgs"); 1165 return (DCMD_ERR); 1166 } 1167 1168 return (DCMD_OK); 1169 } 1170 1171 /*ARGSUSED*/ 1172 static int 1173 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1174 { 1175 kstat_named_t *stats; 1176 GElf_Sym sym; 1177 int nstats, i; 1178 uint_t opt_a = FALSE; 1179 uint_t opt_b = FALSE; 1180 uint_t shift = 0; 1181 const char *suffix; 1182 1183 static const char *bytestats[] = { 1184 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 1185 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 1186 "arc_meta_min", "hdr_size", "data_size", "metadata_size", 1187 "other_size", "anon_size", "anon_evictable_data", 1188 "anon_evictable_metadata", "mru_size", "mru_evictable_data", 1189 "mru_evictable_metadata", "mru_ghost_size", 1190 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata", 1191 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata", 1192 "mfu_ghost_size", "mfu_ghost_evictable_data", 1193 "mfu_ghost_evictable_metadata", "evict_l2_cached", 1194 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes", 1195 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size", 1196 "compressed_size", "uncompressed_size", "overhead_size", 1197 NULL 1198 }; 1199 1200 static const char *extras[] = { 1201 "arc_no_grow", "arc_tempreserve", 1202 NULL 1203 }; 1204 1205 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) { 1206 mdb_warn("failed to find 'arc_stats'"); 1207 return (DCMD_ERR); 1208 } 1209 1210 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 1211 1212 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 1213 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 1214 return (DCMD_ERR); 1215 } 1216 1217 nstats = sym.st_size / sizeof (kstat_named_t); 1218 1219 /* NB: -a / opt_a are ignored for backwards compatability */ 1220 if (mdb_getopts(argc, argv, 1221 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 1222 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 1223 'k', MDB_OPT_SETBITS, 10, &shift, 1224 'm', MDB_OPT_SETBITS, 20, &shift, 1225 'g', MDB_OPT_SETBITS, 30, &shift, 1226 NULL) != argc) 1227 return (DCMD_USAGE); 1228 1229 if (!opt_b && !shift) 1230 shift = 20; 1231 1232 switch (shift) { 1233 case 0: 1234 suffix = "B"; 1235 break; 1236 case 10: 1237 suffix = "KB"; 1238 break; 1239 case 20: 1240 suffix = "MB"; 1241 break; 1242 case 30: 1243 suffix = "GB"; 1244 break; 1245 default: 1246 suffix = "XX"; 1247 } 1248 1249 for (i = 0; i < nstats; i++) { 1250 int j; 1251 boolean_t bytes = B_FALSE; 1252 1253 for (j = 0; bytestats[j]; j++) { 1254 if (strcmp(stats[i].name, bytestats[j]) == 0) { 1255 bytes = B_TRUE; 1256 break; 1257 } 1258 } 1259 1260 if (bytes) { 1261 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 1262 stats[i].value.ui64 >> shift, suffix); 1263 } else { 1264 mdb_printf("%-25s = %9llu\n", stats[i].name, 1265 stats[i].value.ui64); 1266 } 1267 } 1268 1269 for (i = 0; extras[i]; i++) { 1270 uint64_t buf; 1271 1272 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) { 1273 mdb_warn("failed to find '%s'", extras[i]); 1274 return (DCMD_ERR); 1275 } 1276 1277 if (sym.st_size != sizeof (uint64_t) && 1278 sym.st_size != sizeof (uint32_t)) { 1279 mdb_warn("expected scalar for variable '%s'\n", 1280 extras[i]); 1281 return (DCMD_ERR); 1282 } 1283 1284 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 1285 mdb_warn("couldn't read '%s'", extras[i]); 1286 return (DCMD_ERR); 1287 } 1288 1289 mdb_printf("%-25s = ", extras[i]); 1290 1291 /* NB: all the 64-bit extras happen to be byte counts */ 1292 if (sym.st_size == sizeof (uint64_t)) 1293 mdb_printf("%9llu %s\n", buf >> shift, suffix); 1294 1295 if (sym.st_size == sizeof (uint32_t)) 1296 mdb_printf("%9d\n", *((uint32_t *)&buf)); 1297 } 1298 return (DCMD_OK); 1299 } 1300 1301 typedef struct mdb_spa_print { 1302 pool_state_t spa_state; 1303 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; 1304 uintptr_t spa_normal_class; 1305 } mdb_spa_print_t; 1306 1307 1308 const char histo_stars[] = "****************************************"; 1309 const int histo_width = sizeof (histo_stars) - 1; 1310 1311 static void 1312 dump_histogram(const uint64_t *histo, int size, int offset) 1313 { 1314 int i; 1315 int minidx = size - 1; 1316 int maxidx = 0; 1317 uint64_t max = 0; 1318 1319 for (i = 0; i < size; i++) { 1320 if (histo[i] > max) 1321 max = histo[i]; 1322 if (histo[i] > 0 && i > maxidx) 1323 maxidx = i; 1324 if (histo[i] > 0 && i < minidx) 1325 minidx = i; 1326 } 1327 1328 if (max < histo_width) 1329 max = histo_width; 1330 1331 for (i = minidx; i <= maxidx; i++) { 1332 mdb_printf("%3u: %6llu %s\n", 1333 i + offset, (u_longlong_t)histo[i], 1334 &histo_stars[(max - histo[i]) * histo_width / max]); 1335 } 1336 } 1337 1338 typedef struct mdb_metaslab_class { 1339 uint64_t mc_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 1340 } mdb_metaslab_class_t; 1341 1342 /* 1343 * spa_class_histogram(uintptr_t class_addr) 1344 * 1345 * Prints free space histogram for a device class 1346 * 1347 * Returns DCMD_OK, or DCMD_ERR. 1348 */ 1349 static int 1350 spa_class_histogram(uintptr_t class_addr) 1351 { 1352 mdb_metaslab_class_t mc; 1353 if (mdb_ctf_vread(&mc, "metaslab_class_t", 1354 "mdb_metaslab_class_t", class_addr, 0) == -1) 1355 return (DCMD_ERR); 1356 1357 mdb_inc_indent(4); 1358 dump_histogram(mc.mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); 1359 mdb_dec_indent(4); 1360 return (DCMD_OK); 1361 } 1362 1363 /* 1364 * ::spa 1365 * 1366 * -c Print configuration information as well 1367 * -v Print vdev state 1368 * -e Print vdev error stats 1369 * -m Print vdev metaslab info 1370 * -M print vdev metaslab group info 1371 * -h Print histogram info (must be combined with -m or -M) 1372 * 1373 * Print a summarized spa_t. When given no arguments, prints out a table of all 1374 * active pools on the system. 1375 */ 1376 /* ARGSUSED */ 1377 static int 1378 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1379 { 1380 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1381 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1382 const char *state; 1383 int spa_flags = 0; 1384 1385 if (mdb_getopts(argc, argv, 1386 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags, 1387 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags, 1388 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1389 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1390 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1391 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1392 NULL) != argc) 1393 return (DCMD_USAGE); 1394 1395 if (!(flags & DCMD_ADDRSPEC)) { 1396 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1397 mdb_warn("can't walk spa"); 1398 return (DCMD_ERR); 1399 } 1400 1401 return (DCMD_OK); 1402 } 1403 1404 if (flags & DCMD_PIPE_OUT) { 1405 mdb_printf("%#lr\n", addr); 1406 return (DCMD_OK); 1407 } 1408 1409 if (DCMD_HDRSPEC(flags)) 1410 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1411 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1412 1413 mdb_spa_print_t spa; 1414 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1) 1415 return (DCMD_ERR); 1416 1417 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1418 state = "UNKNOWN"; 1419 else 1420 state = statetab[spa.spa_state]; 1421 1422 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1423 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1424 spa_class_histogram(spa.spa_normal_class); 1425 1426 if (spa_flags & SPA_FLAG_CONFIG) { 1427 mdb_printf("\n"); 1428 mdb_inc_indent(4); 1429 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1430 NULL) != DCMD_OK) 1431 return (DCMD_ERR); 1432 mdb_dec_indent(4); 1433 } 1434 1435 if (spa_flags & SPA_FLAG_ALL_VDEV) { 1436 mdb_arg_t v; 1437 char opts[100] = "-"; 1438 int args = 1439 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1; 1440 1441 if (spa_flags & SPA_FLAG_ERRORS) 1442 strcat(opts, "e"); 1443 if (spa_flags & SPA_FLAG_METASLABS) 1444 strcat(opts, "m"); 1445 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 1446 strcat(opts, "M"); 1447 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1448 strcat(opts, "h"); 1449 1450 v.a_type = MDB_TYPE_STRING; 1451 v.a_un.a_str = opts; 1452 1453 mdb_printf("\n"); 1454 mdb_inc_indent(4); 1455 if (mdb_call_dcmd("spa_vdevs", addr, flags, args, 1456 &v) != DCMD_OK) 1457 return (DCMD_ERR); 1458 mdb_dec_indent(4); 1459 } 1460 1461 return (DCMD_OK); 1462 } 1463 1464 typedef struct mdb_spa_config_spa { 1465 uintptr_t spa_config; 1466 } mdb_spa_config_spa_t; 1467 1468 /* 1469 * ::spa_config 1470 * 1471 * Given a spa_t, print the configuration information stored in spa_config. 1472 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1473 * We simply read the value of spa_config and pass off to ::nvlist. 1474 */ 1475 /* ARGSUSED */ 1476 static int 1477 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1478 { 1479 mdb_spa_config_spa_t spa; 1480 1481 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1482 return (DCMD_USAGE); 1483 1484 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", 1485 addr, 0) == -1) 1486 return (DCMD_ERR); 1487 1488 if (spa.spa_config == 0) { 1489 mdb_printf("(none)\n"); 1490 return (DCMD_OK); 1491 } 1492 1493 return (mdb_call_dcmd("nvlist", spa.spa_config, flags, 1494 0, NULL)); 1495 } 1496 1497 typedef struct mdb_range_tree { 1498 struct { 1499 uint64_t bt_num_elems; 1500 uint64_t bt_num_nodes; 1501 } rt_root; 1502 uint64_t rt_space; 1503 range_seg_type_t rt_type; 1504 uint8_t rt_shift; 1505 uint64_t rt_start; 1506 } mdb_range_tree_t; 1507 1508 typedef struct mdb_metaslab_group { 1509 uint64_t mg_fragmentation; 1510 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 1511 uintptr_t mg_vd; 1512 } mdb_metaslab_group_t; 1513 1514 typedef struct mdb_metaslab { 1515 uint64_t ms_id; 1516 uint64_t ms_start; 1517 uint64_t ms_size; 1518 int64_t ms_deferspace; 1519 uint64_t ms_fragmentation; 1520 uint64_t ms_weight; 1521 uintptr_t ms_allocating[TXG_SIZE]; 1522 uintptr_t ms_checkpointing; 1523 uintptr_t ms_freeing; 1524 uintptr_t ms_freed; 1525 uintptr_t ms_allocatable; 1526 uintptr_t ms_unflushed_frees; 1527 uintptr_t ms_unflushed_allocs; 1528 uintptr_t ms_sm; 1529 } mdb_metaslab_t; 1530 1531 typedef struct mdb_space_map_phys_t { 1532 int64_t smp_alloc; 1533 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE]; 1534 } mdb_space_map_phys_t; 1535 1536 typedef struct mdb_space_map { 1537 uint64_t sm_size; 1538 uint8_t sm_shift; 1539 uintptr_t sm_phys; 1540 } mdb_space_map_t; 1541 1542 typedef struct mdb_vdev { 1543 uint64_t vdev_id; 1544 uint64_t vdev_state; 1545 uintptr_t vdev_ops; 1546 struct { 1547 uint64_t vs_aux; 1548 uint64_t vs_ops[VS_ZIO_TYPES]; 1549 uint64_t vs_bytes[VS_ZIO_TYPES]; 1550 uint64_t vs_read_errors; 1551 uint64_t vs_write_errors; 1552 uint64_t vs_checksum_errors; 1553 } vdev_stat; 1554 uintptr_t vdev_child; 1555 uint64_t vdev_children; 1556 uint64_t vdev_ms_count; 1557 uintptr_t vdev_mg; 1558 uintptr_t vdev_ms; 1559 uintptr_t vdev_path; 1560 } mdb_vdev_t; 1561 1562 typedef struct mdb_vdev_ops { 1563 char vdev_op_type[16]; 1564 } mdb_vdev_ops_t; 1565 1566 static int 1567 metaslab_stats(mdb_vdev_t *vd, int spa_flags) 1568 { 1569 mdb_inc_indent(4); 1570 mdb_printf("%<u>%-?s %6s %20s %10s %10s %10s%</u>\n", "ADDR", "ID", 1571 "OFFSET", "FREE", "FRAG", "UCMU"); 1572 1573 uintptr_t *vdev_ms = mdb_alloc(vd->vdev_ms_count * sizeof (vdev_ms), 1574 UM_SLEEP | UM_GC); 1575 if (mdb_vread(vdev_ms, vd->vdev_ms_count * sizeof (uintptr_t), 1576 vd->vdev_ms) == -1) { 1577 mdb_warn("failed to read vdev_ms at %p\n", vd->vdev_ms); 1578 return (DCMD_ERR); 1579 } 1580 1581 for (int m = 0; m < vd->vdev_ms_count; m++) { 1582 mdb_metaslab_t ms; 1583 mdb_space_map_t sm = { 0 }; 1584 mdb_space_map_phys_t smp = { 0 }; 1585 mdb_range_tree_t rt; 1586 uint64_t uallocs, ufrees, raw_free, raw_uchanges_mem; 1587 char free[MDB_NICENUM_BUFLEN]; 1588 char uchanges_mem[MDB_NICENUM_BUFLEN]; 1589 1590 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1591 vdev_ms[m], 0) == -1) 1592 return (DCMD_ERR); 1593 1594 if (ms.ms_sm != 0 && 1595 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t", 1596 ms.ms_sm, 0) == -1) 1597 return (DCMD_ERR); 1598 1599 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", 1600 ms.ms_unflushed_frees, 0) == -1) 1601 return (DCMD_ERR); 1602 ufrees = rt.rt_space; 1603 raw_uchanges_mem = rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE; 1604 1605 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", 1606 ms.ms_unflushed_allocs, 0) == -1) 1607 return (DCMD_ERR); 1608 uallocs = rt.rt_space; 1609 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE; 1610 mdb_nicenum(raw_uchanges_mem, uchanges_mem); 1611 1612 raw_free = ms.ms_size; 1613 if (ms.ms_sm != 0 && sm.sm_phys != 0) { 1614 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 1615 "mdb_space_map_phys_t", sm.sm_phys, 0); 1616 raw_free -= smp.smp_alloc; 1617 } 1618 raw_free += ufrees - uallocs; 1619 mdb_nicenum(raw_free, free); 1620 1621 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id, 1622 ms.ms_start, free); 1623 if (ms.ms_fragmentation == ZFS_FRAG_INVALID) 1624 mdb_printf("%9s ", "-"); 1625 else 1626 mdb_printf("%9llu%% ", ms.ms_fragmentation); 1627 mdb_printf("%10s\n", uchanges_mem); 1628 1629 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != 0 && 1630 sm.sm_phys != 0) { 1631 dump_histogram(smp.smp_histogram, 1632 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift); 1633 } 1634 } 1635 mdb_dec_indent(4); 1636 return (DCMD_OK); 1637 } 1638 1639 static int 1640 metaslab_group_stats(mdb_vdev_t *vd, int spa_flags) 1641 { 1642 mdb_metaslab_group_t mg; 1643 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", 1644 vd->vdev_mg, 0) == -1) { 1645 mdb_warn("failed to read vdev_mg at %p\n", vd->vdev_mg); 1646 return (DCMD_ERR); 1647 } 1648 1649 mdb_inc_indent(4); 1650 mdb_printf("%<u>%-?s %7s %9s%</u>\n", "ADDR", "FRAG", "UCMU"); 1651 1652 if (mg.mg_fragmentation == ZFS_FRAG_INVALID) 1653 mdb_printf("%0?p %6s\n", vd->vdev_mg, "-"); 1654 else 1655 mdb_printf("%0?p %6llu%%", vd->vdev_mg, mg.mg_fragmentation); 1656 1657 1658 uintptr_t *vdev_ms = mdb_alloc(vd->vdev_ms_count * sizeof (vdev_ms), 1659 UM_SLEEP | UM_GC); 1660 if (mdb_vread(vdev_ms, vd->vdev_ms_count * sizeof (uintptr_t), 1661 vd->vdev_ms) == -1) { 1662 mdb_warn("failed to read vdev_ms at %p\n", vd->vdev_ms); 1663 return (DCMD_ERR); 1664 } 1665 1666 uint64_t raw_uchanges_mem = 0; 1667 char uchanges_mem[MDB_NICENUM_BUFLEN]; 1668 for (int m = 0; m < vd->vdev_ms_count; m++) { 1669 mdb_metaslab_t ms; 1670 mdb_range_tree_t rt; 1671 1672 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1673 vdev_ms[m], 0) == -1) 1674 return (DCMD_ERR); 1675 1676 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", 1677 ms.ms_unflushed_frees, 0) == -1) 1678 return (DCMD_ERR); 1679 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE; 1680 1681 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t", 1682 ms.ms_unflushed_allocs, 0) == -1) 1683 return (DCMD_ERR); 1684 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE; 1685 } 1686 mdb_nicenum(raw_uchanges_mem, uchanges_mem); 1687 mdb_printf("%10s\n", uchanges_mem); 1688 1689 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1690 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); 1691 mdb_dec_indent(4); 1692 return (DCMD_OK); 1693 } 1694 1695 /* 1696 * ::vdev 1697 * 1698 * Print out a summarized vdev_t, in the following form: 1699 * 1700 * ADDR STATE AUX DESC 1701 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1702 * 1703 * If '-r' is specified, recursively visit all children. 1704 * 1705 * With '-e', the statistics associated with the vdev are printed as well. 1706 */ 1707 static int 1708 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive, 1709 int spa_flags) 1710 { 1711 mdb_vdev_t vd; 1712 if (mdb_ctf_vread(&vd, "vdev_t", "mdb_vdev_t", 1713 (uintptr_t)addr, 0) == -1) 1714 return (DCMD_ERR); 1715 1716 if (flags & DCMD_PIPE_OUT) { 1717 mdb_printf("%#lr\n", addr); 1718 } else { 1719 char desc[MAXNAMELEN]; 1720 if (vd.vdev_path != 0) { 1721 if (mdb_readstr(desc, sizeof (desc), 1722 (uintptr_t)vd.vdev_path) == -1) { 1723 mdb_warn("failed to read vdev_path at %p\n", 1724 vd.vdev_path); 1725 return (DCMD_ERR); 1726 } 1727 } else if (vd.vdev_ops != 0) { 1728 vdev_ops_t ops; 1729 if (mdb_vread(&ops, sizeof (ops), 1730 (uintptr_t)vd.vdev_ops) == -1) { 1731 mdb_warn("failed to read vdev_ops at %p\n", 1732 vd.vdev_ops); 1733 return (DCMD_ERR); 1734 } 1735 (void) strcpy(desc, ops.vdev_op_type); 1736 } else { 1737 (void) strcpy(desc, "<unknown>"); 1738 } 1739 1740 if (depth == 0 && DCMD_HDRSPEC(flags)) 1741 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1742 "ADDR", "STATE", "AUX", 1743 sizeof (uintptr_t) == 4 ? 43 : 35, 1744 "DESCRIPTION"); 1745 1746 mdb_printf("%0?p ", addr); 1747 1748 const char *state, *aux; 1749 switch (vd.vdev_state) { 1750 case VDEV_STATE_CLOSED: 1751 state = "CLOSED"; 1752 break; 1753 case VDEV_STATE_OFFLINE: 1754 state = "OFFLINE"; 1755 break; 1756 case VDEV_STATE_CANT_OPEN: 1757 state = "CANT_OPEN"; 1758 break; 1759 case VDEV_STATE_DEGRADED: 1760 state = "DEGRADED"; 1761 break; 1762 case VDEV_STATE_HEALTHY: 1763 state = "HEALTHY"; 1764 break; 1765 case VDEV_STATE_REMOVED: 1766 state = "REMOVED"; 1767 break; 1768 case VDEV_STATE_FAULTED: 1769 state = "FAULTED"; 1770 break; 1771 default: 1772 state = "UNKNOWN"; 1773 break; 1774 } 1775 1776 switch (vd.vdev_stat.vs_aux) { 1777 case VDEV_AUX_NONE: 1778 aux = "-"; 1779 break; 1780 case VDEV_AUX_OPEN_FAILED: 1781 aux = "OPEN_FAILED"; 1782 break; 1783 case VDEV_AUX_CORRUPT_DATA: 1784 aux = "CORRUPT_DATA"; 1785 break; 1786 case VDEV_AUX_NO_REPLICAS: 1787 aux = "NO_REPLICAS"; 1788 break; 1789 case VDEV_AUX_BAD_GUID_SUM: 1790 aux = "BAD_GUID_SUM"; 1791 break; 1792 case VDEV_AUX_TOO_SMALL: 1793 aux = "TOO_SMALL"; 1794 break; 1795 case VDEV_AUX_BAD_LABEL: 1796 aux = "BAD_LABEL"; 1797 break; 1798 case VDEV_AUX_VERSION_NEWER: 1799 aux = "VERS_NEWER"; 1800 break; 1801 case VDEV_AUX_VERSION_OLDER: 1802 aux = "VERS_OLDER"; 1803 break; 1804 case VDEV_AUX_UNSUP_FEAT: 1805 aux = "UNSUP_FEAT"; 1806 break; 1807 case VDEV_AUX_SPARED: 1808 aux = "SPARED"; 1809 break; 1810 case VDEV_AUX_ERR_EXCEEDED: 1811 aux = "ERR_EXCEEDED"; 1812 break; 1813 case VDEV_AUX_IO_FAILURE: 1814 aux = "IO_FAILURE"; 1815 break; 1816 case VDEV_AUX_BAD_LOG: 1817 aux = "BAD_LOG"; 1818 break; 1819 case VDEV_AUX_EXTERNAL: 1820 aux = "EXTERNAL"; 1821 break; 1822 case VDEV_AUX_SPLIT_POOL: 1823 aux = "SPLIT_POOL"; 1824 break; 1825 case VDEV_AUX_CHILDREN_OFFLINE: 1826 aux = "CHILDREN_OFFLINE"; 1827 break; 1828 default: 1829 aux = "UNKNOWN"; 1830 break; 1831 } 1832 1833 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1834 1835 if (spa_flags & SPA_FLAG_ERRORS) { 1836 int i; 1837 1838 mdb_inc_indent(4); 1839 mdb_printf("\n"); 1840 mdb_printf("%<u> %12s %12s %12s %12s " 1841 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1842 "IOCTL"); 1843 mdb_printf("OPS "); 1844 for (i = 1; i < VS_ZIO_TYPES; i++) 1845 mdb_printf("%11#llx%s", 1846 vd.vdev_stat.vs_ops[i], 1847 i == VS_ZIO_TYPES - 1 ? "" : " "); 1848 mdb_printf("\n"); 1849 mdb_printf("BYTES "); 1850 for (i = 1; i < VS_ZIO_TYPES; i++) 1851 mdb_printf("%11#llx%s", 1852 vd.vdev_stat.vs_bytes[i], 1853 i == VS_ZIO_TYPES - 1 ? "" : " "); 1854 1855 1856 mdb_printf("\n"); 1857 mdb_printf("EREAD %10#llx\n", 1858 vd.vdev_stat.vs_read_errors); 1859 mdb_printf("EWRITE %10#llx\n", 1860 vd.vdev_stat.vs_write_errors); 1861 mdb_printf("ECKSUM %10#llx\n", 1862 vd.vdev_stat.vs_checksum_errors); 1863 mdb_dec_indent(4); 1864 mdb_printf("\n"); 1865 } 1866 1867 if ((spa_flags & SPA_FLAG_METASLAB_GROUPS) && 1868 vd.vdev_mg != 0) { 1869 metaslab_group_stats(&vd, spa_flags); 1870 } 1871 if ((spa_flags & SPA_FLAG_METASLABS) && vd.vdev_ms != 0) { 1872 metaslab_stats(&vd, spa_flags); 1873 } 1874 } 1875 1876 uint64_t children = vd.vdev_children; 1877 if (children == 0 || !recursive) 1878 return (DCMD_OK); 1879 1880 uintptr_t *child = mdb_alloc(children * sizeof (child), 1881 UM_SLEEP | UM_GC); 1882 if (mdb_vread(child, children * sizeof (void *), vd.vdev_child) == -1) { 1883 mdb_warn("failed to read vdev children at %p", vd.vdev_child); 1884 return (DCMD_ERR); 1885 } 1886 1887 for (uint64_t c = 0; c < children; c++) { 1888 if (do_print_vdev(child[c], flags, depth + 2, recursive, 1889 spa_flags)) { 1890 return (DCMD_ERR); 1891 } 1892 } 1893 1894 return (DCMD_OK); 1895 } 1896 1897 static int 1898 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1899 { 1900 uint64_t depth = 0; 1901 boolean_t recursive = B_FALSE; 1902 int spa_flags = 0; 1903 1904 if (mdb_getopts(argc, argv, 1905 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1906 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1907 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1908 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1909 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1910 'd', MDB_OPT_UINT64, &depth, NULL) != argc) 1911 return (DCMD_USAGE); 1912 1913 if (!(flags & DCMD_ADDRSPEC)) { 1914 mdb_warn("no vdev_t address given\n"); 1915 return (DCMD_ERR); 1916 } 1917 1918 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags)); 1919 } 1920 1921 typedef struct mdb_metaslab_alloc_trace { 1922 uintptr_t mat_mg; 1923 uintptr_t mat_msp; 1924 uint64_t mat_size; 1925 uint64_t mat_weight; 1926 uint64_t mat_offset; 1927 uint32_t mat_dva_id; 1928 int mat_allocator; 1929 } mdb_metaslab_alloc_trace_t; 1930 1931 static void 1932 metaslab_print_weight(uint64_t weight) 1933 { 1934 char buf[100]; 1935 1936 if (WEIGHT_IS_SPACEBASED(weight)) { 1937 mdb_nicenum( 1938 weight & ~(METASLAB_ACTIVE_MASK | METASLAB_WEIGHT_TYPE), 1939 buf); 1940 } else { 1941 char size[MDB_NICENUM_BUFLEN]; 1942 mdb_nicenum(1ULL << WEIGHT_GET_INDEX(weight), size); 1943 (void) mdb_snprintf(buf, sizeof (buf), "%llu x %s", 1944 WEIGHT_GET_COUNT(weight), size); 1945 } 1946 mdb_printf("%11s ", buf); 1947 } 1948 1949 /* ARGSUSED */ 1950 static int 1951 metaslab_weight(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1952 { 1953 uint64_t weight = 0; 1954 char active; 1955 1956 if (argc == 0 && (flags & DCMD_ADDRSPEC)) { 1957 if (mdb_vread(&weight, sizeof (uint64_t), addr) == -1) { 1958 mdb_warn("failed to read weight at %p\n", addr); 1959 return (DCMD_ERR); 1960 } 1961 } else if (argc == 1 && !(flags & DCMD_ADDRSPEC)) { 1962 weight = (argv[0].a_type == MDB_TYPE_IMMEDIATE) ? 1963 argv[0].a_un.a_val : mdb_strtoull(argv[0].a_un.a_str); 1964 } else { 1965 return (DCMD_USAGE); 1966 } 1967 1968 if (DCMD_HDRSPEC(flags)) { 1969 mdb_printf("%<u>%-6s %9s %9s%</u>\n", 1970 "ACTIVE", "ALGORITHM", "WEIGHT"); 1971 } 1972 1973 if (weight & METASLAB_WEIGHT_PRIMARY) 1974 active = 'P'; 1975 else if (weight & METASLAB_WEIGHT_SECONDARY) 1976 active = 'S'; 1977 else 1978 active = '-'; 1979 mdb_printf("%6c %8s ", active, 1980 WEIGHT_IS_SPACEBASED(weight) ? "SPACE" : "SEGMENT"); 1981 metaslab_print_weight(weight); 1982 mdb_printf("\n"); 1983 1984 return (DCMD_OK); 1985 } 1986 1987 /* ARGSUSED */ 1988 static int 1989 metaslab_trace(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1990 { 1991 mdb_metaslab_alloc_trace_t mat; 1992 mdb_metaslab_group_t mg = { 0 }; 1993 char result_type[100]; 1994 1995 if (mdb_ctf_vread(&mat, "metaslab_alloc_trace_t", 1996 "mdb_metaslab_alloc_trace_t", addr, 0) == -1) { 1997 return (DCMD_ERR); 1998 } 1999 2000 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 2001 mdb_printf("%<u>%6s %6s %8s %11s %11s %18s %18s%</u>\n", 2002 "MSID", "DVA", "ASIZE", "ALLOCATOR", "WEIGHT", "RESULT", 2003 "VDEV"); 2004 } 2005 2006 if (mat.mat_msp != 0) { 2007 mdb_metaslab_t ms; 2008 2009 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 2010 mat.mat_msp, 0) == -1) { 2011 return (DCMD_ERR); 2012 } 2013 mdb_printf("%6llu ", ms.ms_id); 2014 } else { 2015 mdb_printf("%6s ", "-"); 2016 } 2017 2018 mdb_printf("%6d %8llx %11llx ", mat.mat_dva_id, mat.mat_size, 2019 mat.mat_allocator); 2020 2021 metaslab_print_weight(mat.mat_weight); 2022 2023 if ((int64_t)mat.mat_offset < 0) { 2024 if (enum_lookup("enum trace_alloc_type", mat.mat_offset, 2025 "TRACE_", sizeof (result_type), result_type) == -1) { 2026 mdb_warn("Could not find enum for trace_alloc_type"); 2027 return (DCMD_ERR); 2028 } 2029 mdb_printf("%18s ", result_type); 2030 } else { 2031 mdb_printf("%<b>%18llx%</b> ", mat.mat_offset); 2032 } 2033 2034 if (mat.mat_mg != 0 && 2035 mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", 2036 mat.mat_mg, 0) == -1) { 2037 return (DCMD_ERR); 2038 } 2039 2040 if (mg.mg_vd != 0) { 2041 mdb_vdev_t vdev; 2042 char desc[MAXNAMELEN]; 2043 2044 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t", 2045 mg.mg_vd, 0) == -1) { 2046 return (DCMD_ERR); 2047 } 2048 2049 if (vdev.vdev_path != 0) { 2050 char path[MAXNAMELEN]; 2051 2052 if (mdb_readstr(path, sizeof (path), 2053 vdev.vdev_path) == -1) { 2054 mdb_warn("failed to read vdev_path at %p\n", 2055 vdev.vdev_path); 2056 return (DCMD_ERR); 2057 } 2058 char *slash; 2059 if ((slash = strrchr(path, '/')) != NULL) { 2060 strcpy(desc, slash + 1); 2061 } else { 2062 strcpy(desc, path); 2063 } 2064 } else if (vdev.vdev_ops != 0) { 2065 mdb_vdev_ops_t ops; 2066 if (mdb_ctf_vread(&ops, "vdev_ops_t", "mdb_vdev_ops_t", 2067 vdev.vdev_ops, 0) == -1) { 2068 mdb_warn("failed to read vdev_ops at %p\n", 2069 vdev.vdev_ops); 2070 return (DCMD_ERR); 2071 } 2072 (void) mdb_snprintf(desc, sizeof (desc), 2073 "%s-%llu", ops.vdev_op_type, vdev.vdev_id); 2074 } else { 2075 (void) strcpy(desc, "<unknown>"); 2076 } 2077 mdb_printf("%18s\n", desc); 2078 } 2079 2080 return (DCMD_OK); 2081 } 2082 2083 typedef struct metaslab_walk_data { 2084 uint64_t mw_numvdevs; 2085 uintptr_t *mw_vdevs; 2086 int mw_curvdev; 2087 uint64_t mw_nummss; 2088 uintptr_t *mw_mss; 2089 int mw_curms; 2090 } metaslab_walk_data_t; 2091 2092 static int 2093 metaslab_walk_step(mdb_walk_state_t *wsp) 2094 { 2095 metaslab_walk_data_t *mw = wsp->walk_data; 2096 metaslab_t ms; 2097 uintptr_t msp; 2098 2099 if (mw->mw_curvdev >= mw->mw_numvdevs) 2100 return (WALK_DONE); 2101 2102 if (mw->mw_mss == NULL) { 2103 uintptr_t mssp; 2104 uintptr_t vdevp; 2105 2106 ASSERT(mw->mw_curms == 0); 2107 ASSERT(mw->mw_nummss == 0); 2108 2109 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 2110 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || 2111 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { 2112 return (WALK_ERR); 2113 } 2114 2115 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 2116 UM_SLEEP | UM_GC); 2117 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 2118 mssp) == -1) { 2119 mdb_warn("failed to read vdev_ms at %p", mssp); 2120 return (WALK_ERR); 2121 } 2122 } 2123 2124 if (mw->mw_curms >= mw->mw_nummss) { 2125 mw->mw_mss = NULL; 2126 mw->mw_curms = 0; 2127 mw->mw_nummss = 0; 2128 mw->mw_curvdev++; 2129 return (WALK_NEXT); 2130 } 2131 2132 msp = mw->mw_mss[mw->mw_curms]; 2133 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 2134 mdb_warn("failed to read metaslab_t at %p", msp); 2135 return (WALK_ERR); 2136 } 2137 2138 mw->mw_curms++; 2139 2140 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 2141 } 2142 2143 static int 2144 metaslab_walk_init(mdb_walk_state_t *wsp) 2145 { 2146 metaslab_walk_data_t *mw; 2147 uintptr_t root_vdevp; 2148 uintptr_t childp; 2149 2150 if (wsp->walk_addr == 0) { 2151 mdb_warn("must supply address of spa_t\n"); 2152 return (WALK_ERR); 2153 } 2154 2155 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 2156 2157 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || 2158 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || 2159 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { 2160 return (DCMD_ERR); 2161 } 2162 2163 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 2164 UM_SLEEP | UM_GC); 2165 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 2166 childp) == -1) { 2167 mdb_warn("failed to read root vdev children at %p", childp); 2168 return (DCMD_ERR); 2169 } 2170 2171 wsp->walk_data = mw; 2172 2173 return (WALK_NEXT); 2174 } 2175 2176 typedef struct mdb_spa { 2177 uintptr_t spa_dsl_pool; 2178 uintptr_t spa_root_vdev; 2179 } mdb_spa_t; 2180 2181 typedef struct mdb_dsl_pool { 2182 uintptr_t dp_root_dir; 2183 } mdb_dsl_pool_t; 2184 2185 typedef struct mdb_dsl_dir { 2186 uintptr_t dd_dbuf; 2187 int64_t dd_space_towrite[TXG_SIZE]; 2188 } mdb_dsl_dir_t; 2189 2190 typedef struct mdb_dsl_dir_phys { 2191 uint64_t dd_used_bytes; 2192 uint64_t dd_compressed_bytes; 2193 uint64_t dd_uncompressed_bytes; 2194 } mdb_dsl_dir_phys_t; 2195 2196 typedef struct space_data { 2197 uint64_t ms_allocating[TXG_SIZE]; 2198 uint64_t ms_checkpointing; 2199 uint64_t ms_freeing; 2200 uint64_t ms_freed; 2201 uint64_t ms_unflushed_frees; 2202 uint64_t ms_unflushed_allocs; 2203 uint64_t ms_allocatable; 2204 int64_t ms_deferspace; 2205 uint64_t avail; 2206 } space_data_t; 2207 2208 /* ARGSUSED */ 2209 static int 2210 space_cb(uintptr_t addr, const void *unknown, void *arg) 2211 { 2212 space_data_t *sd = arg; 2213 mdb_metaslab_t ms; 2214 mdb_range_tree_t rt; 2215 mdb_space_map_t sm = { 0 }; 2216 mdb_space_map_phys_t smp = { 0 }; 2217 uint64_t uallocs, ufrees; 2218 int i; 2219 2220 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 2221 addr, 0) == -1) 2222 return (WALK_ERR); 2223 2224 for (i = 0; i < TXG_SIZE; i++) { 2225 if (mdb_ctf_vread(&rt, "range_tree_t", 2226 "mdb_range_tree_t", ms.ms_allocating[i], 0) == -1) 2227 return (WALK_ERR); 2228 sd->ms_allocating[i] += rt.rt_space; 2229 } 2230 2231 if (mdb_ctf_vread(&rt, "range_tree_t", 2232 "mdb_range_tree_t", ms.ms_checkpointing, 0) == -1) 2233 return (WALK_ERR); 2234 sd->ms_checkpointing += rt.rt_space; 2235 2236 if (mdb_ctf_vread(&rt, "range_tree_t", 2237 "mdb_range_tree_t", ms.ms_freeing, 0) == -1) 2238 return (WALK_ERR); 2239 sd->ms_freeing += rt.rt_space; 2240 2241 if (mdb_ctf_vread(&rt, "range_tree_t", 2242 "mdb_range_tree_t", ms.ms_freed, 0) == -1) 2243 return (WALK_ERR); 2244 sd->ms_freed += rt.rt_space; 2245 2246 if (mdb_ctf_vread(&rt, "range_tree_t", 2247 "mdb_range_tree_t", ms.ms_allocatable, 0) == -1) 2248 return (WALK_ERR); 2249 sd->ms_allocatable += rt.rt_space; 2250 2251 if (mdb_ctf_vread(&rt, "range_tree_t", 2252 "mdb_range_tree_t", ms.ms_unflushed_frees, 0) == -1) 2253 return (WALK_ERR); 2254 sd->ms_unflushed_frees += rt.rt_space; 2255 ufrees = rt.rt_space; 2256 2257 if (mdb_ctf_vread(&rt, "range_tree_t", 2258 "mdb_range_tree_t", ms.ms_unflushed_allocs, 0) == -1) 2259 return (WALK_ERR); 2260 sd->ms_unflushed_allocs += rt.rt_space; 2261 uallocs = rt.rt_space; 2262 2263 if (ms.ms_sm != 0 && 2264 mdb_ctf_vread(&sm, "space_map_t", 2265 "mdb_space_map_t", ms.ms_sm, 0) == -1) 2266 return (WALK_ERR); 2267 2268 if (sm.sm_phys != 0) { 2269 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 2270 "mdb_space_map_phys_t", sm.sm_phys, 0); 2271 } 2272 2273 sd->ms_deferspace += ms.ms_deferspace; 2274 sd->avail += sm.sm_size - smp.smp_alloc + ufrees - uallocs; 2275 2276 return (WALK_NEXT); 2277 } 2278 2279 /* 2280 * ::spa_space [-b] 2281 * 2282 * Given a spa_t, print out it's on-disk space usage and in-core 2283 * estimates of future usage. If -b is given, print space in bytes. 2284 * Otherwise print in megabytes. 2285 */ 2286 /* ARGSUSED */ 2287 static int 2288 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2289 { 2290 mdb_spa_t spa; 2291 mdb_dsl_pool_t dp; 2292 mdb_dsl_dir_t dd; 2293 mdb_dmu_buf_impl_t db; 2294 mdb_dsl_dir_phys_t dsp; 2295 space_data_t sd; 2296 int shift = 20; 2297 char *suffix = "M"; 2298 int bytes = B_FALSE; 2299 2300 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != 2301 argc) 2302 return (DCMD_USAGE); 2303 if (!(flags & DCMD_ADDRSPEC)) 2304 return (DCMD_USAGE); 2305 2306 if (bytes) { 2307 shift = 0; 2308 suffix = ""; 2309 } 2310 2311 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t", 2312 addr, 0) == -1 || 2313 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t", 2314 spa.spa_dsl_pool, 0) == -1 || 2315 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t", 2316 dp.dp_root_dir, 0) == -1 || 2317 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 2318 dd.dd_dbuf, 0) == -1 || 2319 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys", 2320 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) { 2321 return (DCMD_ERR); 2322 } 2323 2324 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 2325 dd.dd_space_towrite[0] >> shift, suffix, 2326 dd.dd_space_towrite[1] >> shift, suffix, 2327 dd.dd_space_towrite[2] >> shift, suffix, 2328 dd.dd_space_towrite[3] >> shift, suffix); 2329 2330 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 2331 dsp.dd_used_bytes >> shift, suffix); 2332 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 2333 dsp.dd_compressed_bytes >> shift, suffix); 2334 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 2335 dsp.dd_uncompressed_bytes >> shift, suffix); 2336 2337 bzero(&sd, sizeof (sd)); 2338 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 2339 mdb_warn("can't walk metaslabs"); 2340 return (DCMD_ERR); 2341 } 2342 2343 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 2344 sd.ms_allocating[0] >> shift, suffix, 2345 sd.ms_allocating[1] >> shift, suffix, 2346 sd.ms_allocating[2] >> shift, suffix, 2347 sd.ms_allocating[3] >> shift, suffix); 2348 mdb_printf("ms_checkpointing = %llu%s\n", 2349 sd.ms_checkpointing >> shift, suffix); 2350 mdb_printf("ms_freeing = %llu%s\n", 2351 sd.ms_freeing >> shift, suffix); 2352 mdb_printf("ms_freed = %llu%s\n", 2353 sd.ms_freed >> shift, suffix); 2354 mdb_printf("ms_unflushed_frees = %llu%s\n", 2355 sd.ms_unflushed_frees >> shift, suffix); 2356 mdb_printf("ms_unflushed_allocs = %llu%s\n", 2357 sd.ms_unflushed_allocs >> shift, suffix); 2358 mdb_printf("ms_allocatable = %llu%s\n", 2359 sd.ms_allocatable >> shift, suffix); 2360 mdb_printf("ms_deferspace = %llu%s\n", 2361 sd.ms_deferspace >> shift, suffix); 2362 mdb_printf("current avail = %llu%s\n", 2363 sd.avail >> shift, suffix); 2364 2365 return (DCMD_OK); 2366 } 2367 2368 typedef struct mdb_spa_aux_vdev { 2369 int sav_count; 2370 uintptr_t sav_vdevs; 2371 } mdb_spa_aux_vdev_t; 2372 2373 typedef struct mdb_spa_vdevs { 2374 uintptr_t spa_root_vdev; 2375 mdb_spa_aux_vdev_t spa_l2cache; 2376 mdb_spa_aux_vdev_t spa_spares; 2377 } mdb_spa_vdevs_t; 2378 2379 static int 2380 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 2381 const char *name) 2382 { 2383 uintptr_t *aux; 2384 size_t len; 2385 int ret, i; 2386 2387 /* 2388 * Iterate over aux vdevs and print those out as well. This is a 2389 * little annoying because we don't have a root vdev to pass to ::vdev. 2390 * Instead, we print a single line and then call it for each child 2391 * vdev. 2392 */ 2393 if (sav->sav_count != 0) { 2394 v[1].a_type = MDB_TYPE_STRING; 2395 v[1].a_un.a_str = "-d"; 2396 v[2].a_type = MDB_TYPE_IMMEDIATE; 2397 v[2].a_un.a_val = 2; 2398 2399 len = sav->sav_count * sizeof (uintptr_t); 2400 aux = mdb_alloc(len, UM_SLEEP); 2401 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) { 2402 mdb_free(aux, len); 2403 mdb_warn("failed to read l2cache vdevs at %p", 2404 sav->sav_vdevs); 2405 return (DCMD_ERR); 2406 } 2407 2408 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 2409 2410 for (i = 0; i < sav->sav_count; i++) { 2411 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 2412 if (ret != DCMD_OK) { 2413 mdb_free(aux, len); 2414 return (ret); 2415 } 2416 } 2417 2418 mdb_free(aux, len); 2419 } 2420 2421 return (0); 2422 } 2423 2424 /* 2425 * ::spa_vdevs 2426 * 2427 * -e Include error stats 2428 * -m Include metaslab information 2429 * -M Include metaslab group information 2430 * -h Include histogram information (requires -m or -M) 2431 * 2432 * Print out a summarized list of vdevs for the given spa_t. 2433 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 2434 * iterating over the cache devices. 2435 */ 2436 /* ARGSUSED */ 2437 static int 2438 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2439 { 2440 mdb_arg_t v[3]; 2441 int ret; 2442 char opts[100] = "-r"; 2443 int spa_flags = 0; 2444 2445 if (mdb_getopts(argc, argv, 2446 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 2447 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 2448 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 2449 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 2450 NULL) != argc) 2451 return (DCMD_USAGE); 2452 2453 if (!(flags & DCMD_ADDRSPEC)) 2454 return (DCMD_USAGE); 2455 2456 mdb_spa_vdevs_t spa; 2457 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1) 2458 return (DCMD_ERR); 2459 2460 /* 2461 * Unitialized spa_t structures can have a NULL root vdev. 2462 */ 2463 if (spa.spa_root_vdev == 0) { 2464 mdb_printf("no associated vdevs\n"); 2465 return (DCMD_OK); 2466 } 2467 2468 if (spa_flags & SPA_FLAG_ERRORS) 2469 strcat(opts, "e"); 2470 if (spa_flags & SPA_FLAG_METASLABS) 2471 strcat(opts, "m"); 2472 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 2473 strcat(opts, "M"); 2474 if (spa_flags & SPA_FLAG_HISTOGRAMS) 2475 strcat(opts, "h"); 2476 2477 v[0].a_type = MDB_TYPE_STRING; 2478 v[0].a_un.a_str = opts; 2479 2480 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 2481 flags, 1, v); 2482 if (ret != DCMD_OK) 2483 return (ret); 2484 2485 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 2486 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 2487 return (DCMD_ERR); 2488 2489 return (DCMD_OK); 2490 } 2491 2492 /* 2493 * ::zio 2494 * 2495 * Print a summary of zio_t and all its children. This is intended to display a 2496 * zio tree, and hence we only pick the most important pieces of information for 2497 * the main summary. More detailed information can always be found by doing a 2498 * '::print zio' on the underlying zio_t. The columns we display are: 2499 * 2500 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED 2501 * 2502 * The 'address' column is indented by one space for each depth level as we 2503 * descend down the tree. 2504 */ 2505 2506 #define ZIO_MAXINDENT 7 2507 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 2508 #define ZIO_WALK_SELF 0 2509 #define ZIO_WALK_CHILD 1 2510 #define ZIO_WALK_PARENT 2 2511 2512 typedef struct zio_print_args { 2513 int zpa_current_depth; 2514 int zpa_min_depth; 2515 int zpa_max_depth; 2516 int zpa_type; 2517 uint_t zpa_flags; 2518 } zio_print_args_t; 2519 2520 typedef struct mdb_zio { 2521 enum zio_type io_type; 2522 enum zio_stage io_stage; 2523 uintptr_t io_waiter; 2524 uintptr_t io_spa; 2525 struct { 2526 struct { 2527 uintptr_t list_next; 2528 } list_head; 2529 } io_parent_list; 2530 int io_error; 2531 } mdb_zio_t; 2532 2533 typedef struct mdb_zio_timestamp { 2534 hrtime_t io_timestamp; 2535 } mdb_zio_timestamp_t; 2536 2537 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 2538 2539 static int 2540 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) 2541 { 2542 mdb_ctf_id_t type_enum, stage_enum; 2543 int indent = zpa->zpa_current_depth; 2544 const char *type, *stage; 2545 uintptr_t laddr; 2546 mdb_zio_t zio; 2547 mdb_zio_timestamp_t zio_timestamp = { 0 }; 2548 2549 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) 2550 return (WALK_ERR); 2551 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", 2552 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); 2553 2554 if (indent > ZIO_MAXINDENT) 2555 indent = ZIO_MAXINDENT; 2556 2557 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 2558 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 2559 mdb_warn("failed to lookup zio enums"); 2560 return (WALK_ERR); 2561 } 2562 2563 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) 2564 type += sizeof ("ZIO_TYPE_") - 1; 2565 else 2566 type = "?"; 2567 2568 if (zio.io_error == 0) { 2569 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); 2570 if (stage != NULL) 2571 stage += sizeof ("ZIO_STAGE_") - 1; 2572 else 2573 stage = "?"; 2574 } else { 2575 stage = "FAILED"; 2576 } 2577 2578 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 2579 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 2580 mdb_printf("%?p\n", addr); 2581 } else { 2582 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 2583 ZIO_MAXWIDTH - indent, addr, type, stage); 2584 if (zio.io_waiter != 0) 2585 mdb_printf("%-16lx ", zio.io_waiter); 2586 else 2587 mdb_printf("%-16s ", "-"); 2588 #ifdef _KERNEL 2589 if (zio_timestamp.io_timestamp != 0) { 2590 mdb_printf("%llums", (mdb_gethrtime() - 2591 zio_timestamp.io_timestamp) / 2592 1000000); 2593 } else { 2594 mdb_printf("%-12s ", "-"); 2595 } 2596 #else 2597 mdb_printf("%-12s ", "-"); 2598 #endif 2599 mdb_printf("\n"); 2600 } 2601 } 2602 2603 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 2604 return (WALK_NEXT); 2605 2606 if (zpa->zpa_type == ZIO_WALK_PARENT) 2607 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2608 "io_parent_list"); 2609 else 2610 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2611 "io_child_list"); 2612 2613 zpa->zpa_current_depth++; 2614 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 2615 mdb_warn("failed to walk zio_t children at %p\n", laddr); 2616 return (WALK_ERR); 2617 } 2618 zpa->zpa_current_depth--; 2619 2620 return (WALK_NEXT); 2621 } 2622 2623 /* ARGSUSED */ 2624 static int 2625 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 2626 { 2627 zio_link_t zl; 2628 uintptr_t ziop; 2629 zio_print_args_t *zpa = arg; 2630 2631 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 2632 mdb_warn("failed to read zio_link_t at %p", addr); 2633 return (WALK_ERR); 2634 } 2635 2636 if (zpa->zpa_type == ZIO_WALK_PARENT) 2637 ziop = (uintptr_t)zl.zl_parent; 2638 else 2639 ziop = (uintptr_t)zl.zl_child; 2640 2641 return (zio_print_cb(ziop, zpa)); 2642 } 2643 2644 /* ARGSUSED */ 2645 static int 2646 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2647 { 2648 zio_print_args_t zpa = { 0 }; 2649 2650 if (!(flags & DCMD_ADDRSPEC)) 2651 return (DCMD_USAGE); 2652 2653 if (mdb_getopts(argc, argv, 2654 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 2655 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 2656 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, 2657 NULL) != argc) 2658 return (DCMD_USAGE); 2659 2660 zpa.zpa_flags = flags; 2661 if (zpa.zpa_max_depth != 0) { 2662 if (zpa.zpa_type == ZIO_WALK_SELF) 2663 zpa.zpa_type = ZIO_WALK_CHILD; 2664 } else if (zpa.zpa_type != ZIO_WALK_SELF) { 2665 zpa.zpa_min_depth = 1; 2666 zpa.zpa_max_depth = 1; 2667 } 2668 2669 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 2670 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n", 2671 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", 2672 "TIME_ELAPSED"); 2673 } 2674 2675 if (zio_print_cb(addr, &zpa) != WALK_NEXT) 2676 return (DCMD_ERR); 2677 2678 return (DCMD_OK); 2679 } 2680 2681 /* 2682 * [addr]::zio_state 2683 * 2684 * Print a summary of all zio_t structures on the system, or for a particular 2685 * pool. This is equivalent to '::walk zio_root | ::zio'. 2686 */ 2687 /*ARGSUSED*/ 2688 static int 2689 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2690 { 2691 /* 2692 * MDB will remember the last address of the pipeline, so if we don't 2693 * zero this we'll end up trying to walk zio structures for a 2694 * non-existent spa_t. 2695 */ 2696 if (!(flags & DCMD_ADDRSPEC)) 2697 addr = 0; 2698 2699 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 2700 } 2701 2702 2703 typedef struct mdb_zfs_btree_hdr { 2704 uintptr_t bth_parent; 2705 boolean_t bth_core; 2706 /* 2707 * For both leaf and core nodes, represents the number of elements in 2708 * the node. For core nodes, they will have bth_count + 1 children. 2709 */ 2710 uint32_t bth_count; 2711 } mdb_zfs_btree_hdr_t; 2712 2713 typedef struct mdb_zfs_btree_core { 2714 mdb_zfs_btree_hdr_t btc_hdr; 2715 uintptr_t btc_children[BTREE_CORE_ELEMS + 1]; 2716 uint8_t btc_elems[]; 2717 } mdb_zfs_btree_core_t; 2718 2719 typedef struct mdb_zfs_btree_leaf { 2720 mdb_zfs_btree_hdr_t btl_hdr; 2721 uint8_t btl_elems[]; 2722 } mdb_zfs_btree_leaf_t; 2723 2724 typedef struct mdb_zfs_btree { 2725 uintptr_t bt_root; 2726 size_t bt_elem_size; 2727 } mdb_zfs_btree_t; 2728 2729 typedef struct btree_walk_data { 2730 mdb_zfs_btree_t bwd_btree; 2731 mdb_zfs_btree_hdr_t *bwd_node; 2732 uint64_t bwd_offset; // In units of bt_node_size 2733 } btree_walk_data_t; 2734 2735 static uintptr_t 2736 btree_leftmost_child(uintptr_t addr, mdb_zfs_btree_hdr_t *buf) 2737 { 2738 size_t size = offsetof(zfs_btree_core_t, btc_children) + 2739 sizeof (uintptr_t); 2740 for (;;) { 2741 if (mdb_vread(buf, size, addr) == -1) { 2742 mdb_warn("failed to read at %p\n", addr); 2743 return ((uintptr_t)0ULL); 2744 } 2745 if (!buf->bth_core) 2746 return (addr); 2747 mdb_zfs_btree_core_t *node = (mdb_zfs_btree_core_t *)buf; 2748 addr = node->btc_children[0]; 2749 } 2750 } 2751 2752 static int 2753 btree_walk_step(mdb_walk_state_t *wsp) 2754 { 2755 btree_walk_data_t *bwd = wsp->walk_data; 2756 size_t elem_size = bwd->bwd_btree.bt_elem_size; 2757 if (wsp->walk_addr == 0ULL) 2758 return (WALK_DONE); 2759 2760 if (!bwd->bwd_node->bth_core) { 2761 /* 2762 * For the first element in a leaf node, read in the full 2763 * leaf, since we only had part of it read in before. 2764 */ 2765 if (bwd->bwd_offset == 0) { 2766 if (mdb_vread(bwd->bwd_node, BTREE_LEAF_SIZE, 2767 wsp->walk_addr) == -1) { 2768 mdb_warn("failed to read at %p\n", 2769 wsp->walk_addr); 2770 return (WALK_ERR); 2771 } 2772 } 2773 2774 int status = wsp->walk_callback((uintptr_t)(wsp->walk_addr + 2775 offsetof(mdb_zfs_btree_leaf_t, btl_elems) + 2776 bwd->bwd_offset * elem_size), bwd->bwd_node, 2777 wsp->walk_cbdata); 2778 if (status != WALK_NEXT) 2779 return (status); 2780 bwd->bwd_offset++; 2781 2782 /* Find the next element, if we're at the end of the leaf. */ 2783 while (bwd->bwd_offset == bwd->bwd_node->bth_count) { 2784 uintptr_t par = bwd->bwd_node->bth_parent; 2785 uintptr_t cur = wsp->walk_addr; 2786 wsp->walk_addr = par; 2787 if (par == 0ULL) 2788 return (WALK_NEXT); 2789 2790 size_t size = sizeof (zfs_btree_core_t) + 2791 BTREE_CORE_ELEMS * elem_size; 2792 if (mdb_vread(bwd->bwd_node, size, wsp->walk_addr) == 2793 -1) { 2794 mdb_warn("failed to read at %p\n", 2795 wsp->walk_addr); 2796 return (WALK_ERR); 2797 } 2798 mdb_zfs_btree_core_t *node = 2799 (mdb_zfs_btree_core_t *)bwd->bwd_node; 2800 int i; 2801 for (i = 0; i <= bwd->bwd_node->bth_count; i++) { 2802 if (node->btc_children[i] == cur) 2803 break; 2804 } 2805 if (i > bwd->bwd_node->bth_count) { 2806 mdb_warn("btree parent/child mismatch at " 2807 "%#lx\n", cur); 2808 return (WALK_ERR); 2809 } 2810 bwd->bwd_offset = i; 2811 } 2812 return (WALK_NEXT); 2813 } 2814 2815 if (!bwd->bwd_node->bth_core) { 2816 mdb_warn("Invalid btree node at %#lx\n", wsp->walk_addr); 2817 return (WALK_ERR); 2818 } 2819 mdb_zfs_btree_core_t *node = (mdb_zfs_btree_core_t *)bwd->bwd_node; 2820 int status = wsp->walk_callback((uintptr_t)(wsp->walk_addr + 2821 offsetof(mdb_zfs_btree_core_t, btc_elems) + bwd->bwd_offset * 2822 elem_size), bwd->bwd_node, wsp->walk_cbdata); 2823 if (status != WALK_NEXT) 2824 return (status); 2825 2826 uintptr_t new_child = node->btc_children[bwd->bwd_offset + 1]; 2827 wsp->walk_addr = btree_leftmost_child(new_child, bwd->bwd_node); 2828 if (wsp->walk_addr == 0ULL) 2829 return (WALK_ERR); 2830 2831 bwd->bwd_offset = 0; 2832 return (WALK_NEXT); 2833 } 2834 2835 static int 2836 btree_walk_init(mdb_walk_state_t *wsp) 2837 { 2838 btree_walk_data_t *bwd; 2839 2840 if (wsp->walk_addr == 0ULL) { 2841 mdb_warn("must supply address of zfs_btree_t\n"); 2842 return (WALK_ERR); 2843 } 2844 2845 bwd = mdb_zalloc(sizeof (btree_walk_data_t), UM_SLEEP); 2846 if (mdb_ctf_vread(&bwd->bwd_btree, "zfs_btree_t", "mdb_zfs_btree_t", 2847 wsp->walk_addr, 0) == -1) { 2848 mdb_free(bwd, sizeof (*bwd)); 2849 return (WALK_ERR); 2850 } 2851 2852 if (bwd->bwd_btree.bt_elem_size == 0) { 2853 mdb_warn("invalid or uninitialized btree at %#lx\n", 2854 wsp->walk_addr); 2855 mdb_free(bwd, sizeof (*bwd)); 2856 return (WALK_ERR); 2857 } 2858 2859 size_t size = MAX(BTREE_LEAF_SIZE, sizeof (zfs_btree_core_t) + 2860 BTREE_CORE_ELEMS * bwd->bwd_btree.bt_elem_size); 2861 bwd->bwd_node = mdb_zalloc(size, UM_SLEEP); 2862 2863 uintptr_t node = (uintptr_t)bwd->bwd_btree.bt_root; 2864 if (node == 0ULL) { 2865 wsp->walk_addr = 0ULL; 2866 wsp->walk_data = bwd; 2867 return (WALK_NEXT); 2868 } 2869 node = btree_leftmost_child(node, bwd->bwd_node); 2870 if (node == 0ULL) { 2871 mdb_free(bwd->bwd_node, size); 2872 mdb_free(bwd, sizeof (*bwd)); 2873 return (WALK_ERR); 2874 } 2875 bwd->bwd_offset = 0; 2876 2877 wsp->walk_addr = node; 2878 wsp->walk_data = bwd; 2879 return (WALK_NEXT); 2880 } 2881 2882 static void 2883 btree_walk_fini(mdb_walk_state_t *wsp) 2884 { 2885 btree_walk_data_t *bwd = (btree_walk_data_t *)wsp->walk_data; 2886 2887 if (bwd == NULL) 2888 return; 2889 2890 size_t size = MAX(BTREE_LEAF_SIZE, sizeof (zfs_btree_core_t) + 2891 BTREE_CORE_ELEMS * bwd->bwd_btree.bt_elem_size); 2892 if (bwd->bwd_node != NULL) 2893 mdb_free(bwd->bwd_node, size); 2894 2895 mdb_free(bwd, sizeof (*bwd)); 2896 } 2897 2898 typedef struct mdb_multilist { 2899 uint64_t ml_num_sublists; 2900 uintptr_t ml_sublists; 2901 } mdb_multilist_t; 2902 2903 static int 2904 multilist_walk_step(mdb_walk_state_t *wsp) 2905 { 2906 return (wsp->walk_callback(wsp->walk_addr, wsp->walk_layer, 2907 wsp->walk_cbdata)); 2908 } 2909 2910 static int 2911 multilist_walk_init(mdb_walk_state_t *wsp) 2912 { 2913 mdb_multilist_t ml; 2914 ssize_t sublist_sz; 2915 int list_offset; 2916 size_t i; 2917 2918 if (wsp->walk_addr == 0) { 2919 mdb_warn("must supply address of multilist_t\n"); 2920 return (WALK_ERR); 2921 } 2922 2923 if (mdb_ctf_vread(&ml, "multilist_t", "mdb_multilist_t", 2924 wsp->walk_addr, 0) == -1) { 2925 return (WALK_ERR); 2926 } 2927 2928 if (ml.ml_num_sublists == 0 || ml.ml_sublists == 0) { 2929 mdb_warn("invalid or uninitialized multilist at %#lx\n", 2930 wsp->walk_addr); 2931 return (WALK_ERR); 2932 } 2933 2934 /* mdb_ctf_sizeof_by_name() will print an error for us */ 2935 sublist_sz = mdb_ctf_sizeof_by_name("multilist_sublist_t"); 2936 if (sublist_sz == -1) 2937 return (WALK_ERR); 2938 2939 /* mdb_ctf_offsetof_by_name will print an error for us */ 2940 list_offset = mdb_ctf_offsetof_by_name("multilist_sublist_t", 2941 "mls_list"); 2942 if (list_offset == -1) 2943 return (WALK_ERR); 2944 2945 for (i = 0; i < ml.ml_num_sublists; i++) { 2946 wsp->walk_addr = ml.ml_sublists + i * sublist_sz + list_offset; 2947 2948 if (mdb_layered_walk("list", wsp) == -1) { 2949 mdb_warn("can't walk multilist sublist"); 2950 return (WALK_ERR); 2951 } 2952 } 2953 2954 return (WALK_NEXT); 2955 } 2956 2957 typedef struct mdb_txg_list { 2958 size_t tl_offset; 2959 uintptr_t tl_head[TXG_SIZE]; 2960 } mdb_txg_list_t; 2961 2962 typedef struct txg_list_walk_data { 2963 uintptr_t lw_head[TXG_SIZE]; 2964 int lw_txgoff; 2965 int lw_maxoff; 2966 size_t lw_offset; 2967 void *lw_obj; 2968 } txg_list_walk_data_t; 2969 2970 static int 2971 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 2972 { 2973 txg_list_walk_data_t *lwd; 2974 mdb_txg_list_t list; 2975 int i; 2976 2977 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 2978 if (mdb_ctf_vread(&list, "txg_list_t", "mdb_txg_list_t", wsp->walk_addr, 2979 0) == -1) { 2980 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 2981 return (WALK_ERR); 2982 } 2983 2984 for (i = 0; i < TXG_SIZE; i++) 2985 lwd->lw_head[i] = list.tl_head[i]; 2986 lwd->lw_offset = list.tl_offset; 2987 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 2988 UM_SLEEP | UM_GC); 2989 lwd->lw_txgoff = txg; 2990 lwd->lw_maxoff = maxoff; 2991 2992 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2993 wsp->walk_data = lwd; 2994 2995 return (WALK_NEXT); 2996 } 2997 2998 static int 2999 txg_list_walk_init(mdb_walk_state_t *wsp) 3000 { 3001 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 3002 } 3003 3004 static int 3005 txg_list0_walk_init(mdb_walk_state_t *wsp) 3006 { 3007 return (txg_list_walk_init_common(wsp, 0, 0)); 3008 } 3009 3010 static int 3011 txg_list1_walk_init(mdb_walk_state_t *wsp) 3012 { 3013 return (txg_list_walk_init_common(wsp, 1, 1)); 3014 } 3015 3016 static int 3017 txg_list2_walk_init(mdb_walk_state_t *wsp) 3018 { 3019 return (txg_list_walk_init_common(wsp, 2, 2)); 3020 } 3021 3022 static int 3023 txg_list3_walk_init(mdb_walk_state_t *wsp) 3024 { 3025 return (txg_list_walk_init_common(wsp, 3, 3)); 3026 } 3027 3028 static int 3029 txg_list_walk_step(mdb_walk_state_t *wsp) 3030 { 3031 txg_list_walk_data_t *lwd = wsp->walk_data; 3032 uintptr_t addr; 3033 txg_node_t *node; 3034 int status; 3035 3036 while (wsp->walk_addr == 0 && lwd->lw_txgoff < lwd->lw_maxoff) { 3037 lwd->lw_txgoff++; 3038 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 3039 } 3040 3041 if (wsp->walk_addr == 0) 3042 return (WALK_DONE); 3043 3044 addr = wsp->walk_addr - lwd->lw_offset; 3045 3046 if (mdb_vread(lwd->lw_obj, 3047 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 3048 mdb_warn("failed to read list element at %#lx", addr); 3049 return (WALK_ERR); 3050 } 3051 3052 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 3053 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 3054 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 3055 3056 return (status); 3057 } 3058 3059 /* 3060 * ::walk spa 3061 * 3062 * Walk all named spa_t structures in the namespace. This is nothing more than 3063 * a layered avl walk. 3064 */ 3065 static int 3066 spa_walk_init(mdb_walk_state_t *wsp) 3067 { 3068 GElf_Sym sym; 3069 3070 if (wsp->walk_addr != 0) { 3071 mdb_warn("spa walk only supports global walks\n"); 3072 return (WALK_ERR); 3073 } 3074 3075 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 3076 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 3077 return (WALK_ERR); 3078 } 3079 3080 wsp->walk_addr = (uintptr_t)sym.st_value; 3081 3082 if (mdb_layered_walk("avl", wsp) == -1) { 3083 mdb_warn("failed to walk 'avl'\n"); 3084 return (WALK_ERR); 3085 } 3086 3087 return (WALK_NEXT); 3088 } 3089 3090 static int 3091 spa_walk_step(mdb_walk_state_t *wsp) 3092 { 3093 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata)); 3094 } 3095 3096 /* 3097 * [addr]::walk zio 3098 * 3099 * Walk all active zio_t structures on the system. This is simply a layered 3100 * walk on top of ::walk zio_cache, with the optional ability to limit the 3101 * structures to a particular pool. 3102 */ 3103 static int 3104 zio_walk_init(mdb_walk_state_t *wsp) 3105 { 3106 wsp->walk_data = (void *)wsp->walk_addr; 3107 3108 if (mdb_layered_walk("zio_cache", wsp) == -1) { 3109 mdb_warn("failed to walk 'zio_cache'\n"); 3110 return (WALK_ERR); 3111 } 3112 3113 return (WALK_NEXT); 3114 } 3115 3116 static int 3117 zio_walk_step(mdb_walk_state_t *wsp) 3118 { 3119 mdb_zio_t zio; 3120 uintptr_t spa = (uintptr_t)wsp->walk_data; 3121 3122 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 3123 wsp->walk_addr, 0) == -1) 3124 return (WALK_ERR); 3125 3126 if (spa != 0 && spa != zio.io_spa) 3127 return (WALK_NEXT); 3128 3129 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 3130 } 3131 3132 /* 3133 * [addr]::walk zio_root 3134 * 3135 * Walk only root zio_t structures, optionally for a particular spa_t. 3136 */ 3137 static int 3138 zio_walk_root_step(mdb_walk_state_t *wsp) 3139 { 3140 mdb_zio_t zio; 3141 uintptr_t spa = (uintptr_t)wsp->walk_data; 3142 3143 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 3144 wsp->walk_addr, 0) == -1) 3145 return (WALK_ERR); 3146 3147 if (spa != 0 && spa != zio.io_spa) 3148 return (WALK_NEXT); 3149 3150 /* If the parent list is not empty, ignore */ 3151 if (zio.io_parent_list.list_head.list_next != 3152 wsp->walk_addr + 3153 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + 3154 mdb_ctf_offsetof_by_name("struct list", "list_head")) 3155 return (WALK_NEXT); 3156 3157 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 3158 } 3159 3160 /* 3161 * ::zfs_blkstats 3162 * 3163 * -v print verbose per-level information 3164 * 3165 */ 3166 static int 3167 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3168 { 3169 boolean_t verbose = B_FALSE; 3170 zfs_all_blkstats_t stats; 3171 dmu_object_type_t t; 3172 zfs_blkstat_t *tzb; 3173 uint64_t ditto; 3174 3175 if (mdb_getopts(argc, argv, 3176 'v', MDB_OPT_SETBITS, TRUE, &verbose, 3177 NULL) != argc) 3178 return (DCMD_USAGE); 3179 3180 if (!(flags & DCMD_ADDRSPEC)) 3181 return (DCMD_USAGE); 3182 3183 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || 3184 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || 3185 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 3186 mdb_warn("failed to read data at %p;", addr); 3187 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 3188 return (DCMD_ERR); 3189 } 3190 3191 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 3192 if (tzb->zb_gangs != 0) { 3193 mdb_printf("Ganged blocks: %llu\n", 3194 (longlong_t)tzb->zb_gangs); 3195 } 3196 3197 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 3198 tzb->zb_ditto_3_of_3_samevdev; 3199 if (ditto != 0) { 3200 mdb_printf("Dittoed blocks on same vdev: %llu\n", 3201 (longlong_t)ditto); 3202 } 3203 3204 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 3205 "\t avg\t comp\t%%Total\tType\n"); 3206 3207 for (t = 0; t <= DMU_OT_TOTAL; t++) { 3208 char csize[MDB_NICENUM_BUFLEN], lsize[MDB_NICENUM_BUFLEN]; 3209 char psize[MDB_NICENUM_BUFLEN], asize[MDB_NICENUM_BUFLEN]; 3210 char avg[MDB_NICENUM_BUFLEN]; 3211 char comp[MDB_NICENUM_BUFLEN], pct[MDB_NICENUM_BUFLEN]; 3212 char typename[64]; 3213 int l; 3214 3215 3216 if (t == DMU_OT_DEFERRED) 3217 strcpy(typename, "deferred free"); 3218 else if (t == DMU_OT_OTHER) 3219 strcpy(typename, "other"); 3220 else if (t == DMU_OT_TOTAL) 3221 strcpy(typename, "Total"); 3222 else if (enum_lookup("enum dmu_object_type", 3223 t, "DMU_OT_", sizeof (typename), typename) == -1) { 3224 mdb_warn("failed to read type name"); 3225 return (DCMD_ERR); 3226 } 3227 3228 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 3229 continue; 3230 3231 for (l = -1; l < DN_MAX_LEVELS; l++) { 3232 int level = (l == -1 ? DN_MAX_LEVELS : l); 3233 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 3234 3235 if (zb->zb_asize == 0) 3236 continue; 3237 3238 /* 3239 * Don't print each level unless requested. 3240 */ 3241 if (!verbose && level != DN_MAX_LEVELS) 3242 continue; 3243 3244 /* 3245 * If all the space is level 0, don't print the 3246 * level 0 separately. 3247 */ 3248 if (level == 0 && zb->zb_asize == 3249 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 3250 continue; 3251 3252 mdb_nicenum(zb->zb_count, csize); 3253 mdb_nicenum(zb->zb_lsize, lsize); 3254 mdb_nicenum(zb->zb_psize, psize); 3255 mdb_nicenum(zb->zb_asize, asize); 3256 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 3257 (void) mdb_snprintfrac(comp, MDB_NICENUM_BUFLEN, 3258 zb->zb_lsize, zb->zb_psize, 2); 3259 (void) mdb_snprintfrac(pct, MDB_NICENUM_BUFLEN, 3260 100 * zb->zb_asize, tzb->zb_asize, 2); 3261 3262 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 3263 "\t%5s\t%6s\t", 3264 csize, lsize, psize, asize, avg, comp, pct); 3265 3266 if (level == DN_MAX_LEVELS) 3267 mdb_printf("%s\n", typename); 3268 else 3269 mdb_printf(" L%d %s\n", 3270 level, typename); 3271 } 3272 } 3273 3274 return (DCMD_OK); 3275 } 3276 3277 typedef struct mdb_reference { 3278 uintptr_t ref_holder; 3279 uintptr_t ref_removed; 3280 uint64_t ref_number; 3281 } mdb_reference_t; 3282 3283 /* ARGSUSED */ 3284 static int 3285 reference_cb(uintptr_t addr, const void *ignored, void *arg) 3286 { 3287 mdb_reference_t ref; 3288 boolean_t holder_is_str = B_FALSE; 3289 char holder_str[128]; 3290 boolean_t removed = (boolean_t)arg; 3291 3292 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr, 3293 0) == -1) 3294 return (DCMD_ERR); 3295 3296 if (mdb_readstr(holder_str, sizeof (holder_str), 3297 ref.ref_holder) != -1) 3298 holder_is_str = strisprint(holder_str); 3299 3300 if (removed) 3301 mdb_printf("removed "); 3302 mdb_printf("reference "); 3303 if (ref.ref_number != 1) 3304 mdb_printf("with count=%llu ", ref.ref_number); 3305 mdb_printf("with tag %lx", ref.ref_holder); 3306 if (holder_is_str) 3307 mdb_printf(" \"%s\"", holder_str); 3308 mdb_printf(", held at:\n"); 3309 3310 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 3311 3312 if (removed) { 3313 mdb_printf("removed at:\n"); 3314 (void) mdb_call_dcmd("whatis", ref.ref_removed, 3315 DCMD_ADDRSPEC, 0, NULL); 3316 } 3317 3318 mdb_printf("\n"); 3319 3320 return (WALK_NEXT); 3321 } 3322 3323 typedef struct mdb_zfs_refcount { 3324 uint64_t rc_count; 3325 } mdb_zfs_refcount_t; 3326 3327 typedef struct mdb_zfs_refcount_removed { 3328 uint64_t rc_removed_count; 3329 } mdb_zfs_refcount_removed_t; 3330 3331 typedef struct mdb_zfs_refcount_tracked { 3332 boolean_t rc_tracked; 3333 } mdb_zfs_refcount_tracked_t; 3334 3335 /* ARGSUSED */ 3336 static int 3337 zfs_refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3338 { 3339 mdb_zfs_refcount_t rc; 3340 mdb_zfs_refcount_removed_t rcr; 3341 mdb_zfs_refcount_tracked_t rct; 3342 int off; 3343 boolean_t released = B_FALSE; 3344 3345 if (!(flags & DCMD_ADDRSPEC)) 3346 return (DCMD_USAGE); 3347 3348 if (mdb_getopts(argc, argv, 3349 'r', MDB_OPT_SETBITS, B_TRUE, &released, 3350 NULL) != argc) 3351 return (DCMD_USAGE); 3352 3353 if (mdb_ctf_vread(&rc, "zfs_refcount_t", "mdb_zfs_refcount_t", addr, 3354 0) == -1) 3355 return (DCMD_ERR); 3356 3357 if (mdb_ctf_vread(&rcr, "zfs_refcount_t", "mdb_zfs_refcount_removed_t", 3358 addr, MDB_CTF_VREAD_QUIET) == -1) { 3359 mdb_printf("zfs_refcount_t at %p has %llu holds (untracked)\n", 3360 addr, (longlong_t)rc.rc_count); 3361 return (DCMD_OK); 3362 } 3363 3364 if (mdb_ctf_vread(&rct, "zfs_refcount_t", "mdb_zfs_refcount_tracked_t", 3365 addr, MDB_CTF_VREAD_QUIET) == -1) { 3366 /* If this is an old target, it might be tracked. */ 3367 rct.rc_tracked = B_TRUE; 3368 } 3369 3370 mdb_printf("zfs_refcount_t at %p has %llu current holds, " 3371 "%llu recently released holds\n", 3372 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count); 3373 3374 if (rct.rc_tracked && rc.rc_count > 0) 3375 mdb_printf("current holds:\n"); 3376 off = mdb_ctf_offsetof_by_name("zfs_refcount_t", "rc_list"); 3377 if (off == -1) 3378 return (DCMD_ERR); 3379 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 3380 3381 if (released && rcr.rc_removed_count > 0) { 3382 mdb_printf("released holds:\n"); 3383 3384 off = mdb_ctf_offsetof_by_name("zfs_refcount_t", "rc_removed"); 3385 if (off == -1) 3386 return (DCMD_ERR); 3387 mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off); 3388 } 3389 3390 return (DCMD_OK); 3391 } 3392 3393 /* ARGSUSED */ 3394 static int 3395 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3396 { 3397 sa_attr_table_t *table; 3398 sa_os_t sa_os; 3399 char *name; 3400 int i; 3401 3402 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 3403 mdb_warn("failed to read sa_os at %p", addr); 3404 return (DCMD_ERR); 3405 } 3406 3407 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 3408 UM_SLEEP | UM_GC); 3409 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 3410 3411 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 3412 (uintptr_t)sa_os.sa_attr_table) == -1) { 3413 mdb_warn("failed to read sa_os at %p", addr); 3414 return (DCMD_ERR); 3415 } 3416 3417 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 3418 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 3419 for (i = 0; i != sa_os.sa_num_attrs; i++) { 3420 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 3421 mdb_printf("%5x %8x %8x %8x %-s\n", 3422 (int)table[i].sa_attr, (int)table[i].sa_registered, 3423 (int)table[i].sa_length, table[i].sa_byteswap, name); 3424 } 3425 3426 return (DCMD_OK); 3427 } 3428 3429 static int 3430 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 3431 { 3432 uintptr_t idx_table; 3433 3434 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { 3435 mdb_printf("can't find offset table in sa_idx_tab\n"); 3436 return (-1); 3437 } 3438 3439 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 3440 UM_SLEEP | UM_GC); 3441 3442 if (mdb_vread(*off_tab, 3443 attr_count * sizeof (uint32_t), idx_table) == -1) { 3444 mdb_warn("failed to attribute offset table %p", idx_table); 3445 return (-1); 3446 } 3447 3448 return (DCMD_OK); 3449 } 3450 3451 /*ARGSUSED*/ 3452 static int 3453 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3454 { 3455 uint32_t *offset_tab; 3456 int attr_count; 3457 uint64_t attr_id; 3458 uintptr_t attr_addr; 3459 uintptr_t bonus_tab, spill_tab; 3460 uintptr_t db_bonus, db_spill; 3461 uintptr_t os, os_sa; 3462 uintptr_t db_data; 3463 3464 if (argc != 1) 3465 return (DCMD_USAGE); 3466 3467 if (argv[0].a_type == MDB_TYPE_STRING) 3468 attr_id = mdb_strtoull(argv[0].a_un.a_str); 3469 else 3470 return (DCMD_USAGE); 3471 3472 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || 3473 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || 3474 GETMEMB(addr, "sa_handle", sa_os, os) || 3475 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || 3476 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { 3477 mdb_printf("Can't find necessary information in sa_handle " 3478 "in sa_handle\n"); 3479 return (DCMD_ERR); 3480 } 3481 3482 if (GETMEMB(os, "objset", os_sa, os_sa)) { 3483 mdb_printf("Can't find os_sa in objset\n"); 3484 return (DCMD_ERR); 3485 } 3486 3487 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { 3488 mdb_printf("Can't find sa_num_attrs\n"); 3489 return (DCMD_ERR); 3490 } 3491 3492 if (attr_id > attr_count) { 3493 mdb_printf("attribute id number is out of range\n"); 3494 return (DCMD_ERR); 3495 } 3496 3497 if (bonus_tab) { 3498 if (sa_get_off_table(bonus_tab, &offset_tab, 3499 attr_count) == -1) { 3500 return (DCMD_ERR); 3501 } 3502 3503 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { 3504 mdb_printf("can't find db_data in bonus dbuf\n"); 3505 return (DCMD_ERR); 3506 } 3507 } 3508 3509 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 3510 spill_tab == 0) { 3511 mdb_printf("Attribute does not exist\n"); 3512 return (DCMD_ERR); 3513 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 3514 if (sa_get_off_table(spill_tab, &offset_tab, 3515 attr_count) == -1) { 3516 return (DCMD_ERR); 3517 } 3518 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { 3519 mdb_printf("can't find db_data in spill dbuf\n"); 3520 return (DCMD_ERR); 3521 } 3522 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 3523 mdb_printf("Attribute does not exist\n"); 3524 return (DCMD_ERR); 3525 } 3526 } 3527 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 3528 mdb_printf("%p\n", attr_addr); 3529 return (DCMD_OK); 3530 } 3531 3532 /* ARGSUSED */ 3533 static int 3534 zfs_ace_print_common(uintptr_t addr, uint_t flags, 3535 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 3536 uint16_t ace_type, int verbose) 3537 { 3538 if (DCMD_HDRSPEC(flags) && !verbose) 3539 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 3540 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 3541 3542 if (!verbose) { 3543 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 3544 ace_flags, access_mask, ace_type, id); 3545 return (DCMD_OK); 3546 } 3547 3548 switch (ace_flags & ACE_TYPE_FLAGS) { 3549 case ACE_OWNER: 3550 mdb_printf("owner@:"); 3551 break; 3552 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 3553 mdb_printf("group@:"); 3554 break; 3555 case ACE_EVERYONE: 3556 mdb_printf("everyone@:"); 3557 break; 3558 case ACE_IDENTIFIER_GROUP: 3559 mdb_printf("group:%llx:", (u_longlong_t)id); 3560 break; 3561 case 0: /* User entry */ 3562 mdb_printf("user:%llx:", (u_longlong_t)id); 3563 break; 3564 } 3565 3566 /* print out permission mask */ 3567 if (access_mask & ACE_READ_DATA) 3568 mdb_printf("r"); 3569 else 3570 mdb_printf("-"); 3571 if (access_mask & ACE_WRITE_DATA) 3572 mdb_printf("w"); 3573 else 3574 mdb_printf("-"); 3575 if (access_mask & ACE_EXECUTE) 3576 mdb_printf("x"); 3577 else 3578 mdb_printf("-"); 3579 if (access_mask & ACE_APPEND_DATA) 3580 mdb_printf("p"); 3581 else 3582 mdb_printf("-"); 3583 if (access_mask & ACE_DELETE) 3584 mdb_printf("d"); 3585 else 3586 mdb_printf("-"); 3587 if (access_mask & ACE_DELETE_CHILD) 3588 mdb_printf("D"); 3589 else 3590 mdb_printf("-"); 3591 if (access_mask & ACE_READ_ATTRIBUTES) 3592 mdb_printf("a"); 3593 else 3594 mdb_printf("-"); 3595 if (access_mask & ACE_WRITE_ATTRIBUTES) 3596 mdb_printf("A"); 3597 else 3598 mdb_printf("-"); 3599 if (access_mask & ACE_READ_NAMED_ATTRS) 3600 mdb_printf("R"); 3601 else 3602 mdb_printf("-"); 3603 if (access_mask & ACE_WRITE_NAMED_ATTRS) 3604 mdb_printf("W"); 3605 else 3606 mdb_printf("-"); 3607 if (access_mask & ACE_READ_ACL) 3608 mdb_printf("c"); 3609 else 3610 mdb_printf("-"); 3611 if (access_mask & ACE_WRITE_ACL) 3612 mdb_printf("C"); 3613 else 3614 mdb_printf("-"); 3615 if (access_mask & ACE_WRITE_OWNER) 3616 mdb_printf("o"); 3617 else 3618 mdb_printf("-"); 3619 if (access_mask & ACE_SYNCHRONIZE) 3620 mdb_printf("s"); 3621 else 3622 mdb_printf("-"); 3623 3624 mdb_printf(":"); 3625 3626 /* Print out inheritance flags */ 3627 if (ace_flags & ACE_FILE_INHERIT_ACE) 3628 mdb_printf("f"); 3629 else 3630 mdb_printf("-"); 3631 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 3632 mdb_printf("d"); 3633 else 3634 mdb_printf("-"); 3635 if (ace_flags & ACE_INHERIT_ONLY_ACE) 3636 mdb_printf("i"); 3637 else 3638 mdb_printf("-"); 3639 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 3640 mdb_printf("n"); 3641 else 3642 mdb_printf("-"); 3643 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 3644 mdb_printf("S"); 3645 else 3646 mdb_printf("-"); 3647 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 3648 mdb_printf("F"); 3649 else 3650 mdb_printf("-"); 3651 if (ace_flags & ACE_INHERITED_ACE) 3652 mdb_printf("I"); 3653 else 3654 mdb_printf("-"); 3655 3656 switch (ace_type) { 3657 case ACE_ACCESS_ALLOWED_ACE_TYPE: 3658 mdb_printf(":allow\n"); 3659 break; 3660 case ACE_ACCESS_DENIED_ACE_TYPE: 3661 mdb_printf(":deny\n"); 3662 break; 3663 case ACE_SYSTEM_AUDIT_ACE_TYPE: 3664 mdb_printf(":audit\n"); 3665 break; 3666 case ACE_SYSTEM_ALARM_ACE_TYPE: 3667 mdb_printf(":alarm\n"); 3668 break; 3669 default: 3670 mdb_printf(":?\n"); 3671 } 3672 return (DCMD_OK); 3673 } 3674 3675 /* ARGSUSED */ 3676 static int 3677 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3678 { 3679 zfs_ace_t zace; 3680 int verbose = FALSE; 3681 uint64_t id; 3682 3683 if (!(flags & DCMD_ADDRSPEC)) 3684 return (DCMD_USAGE); 3685 3686 if (mdb_getopts(argc, argv, 3687 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3688 return (DCMD_USAGE); 3689 3690 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 3691 mdb_warn("failed to read zfs_ace_t"); 3692 return (DCMD_ERR); 3693 } 3694 3695 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 3696 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 3697 id = zace.z_fuid; 3698 else 3699 id = -1; 3700 3701 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 3702 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 3703 } 3704 3705 /* ARGSUSED */ 3706 static int 3707 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3708 { 3709 ace_t ace; 3710 uint64_t id; 3711 int verbose = FALSE; 3712 3713 if (!(flags & DCMD_ADDRSPEC)) 3714 return (DCMD_USAGE); 3715 3716 if (mdb_getopts(argc, argv, 3717 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3718 return (DCMD_USAGE); 3719 3720 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 3721 mdb_warn("failed to read ace_t"); 3722 return (DCMD_ERR); 3723 } 3724 3725 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 3726 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 3727 id = ace.a_who; 3728 else 3729 id = -1; 3730 3731 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 3732 ace.a_flags, ace.a_type, verbose)); 3733 } 3734 3735 typedef struct acl_dump_args { 3736 int a_argc; 3737 const mdb_arg_t *a_argv; 3738 uint16_t a_version; 3739 int a_flags; 3740 } acl_dump_args_t; 3741 3742 /* ARGSUSED */ 3743 static int 3744 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 3745 { 3746 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 3747 3748 if (acl_args->a_version == 1) { 3749 if (mdb_call_dcmd("zfs_ace", addr, 3750 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 3751 acl_args->a_argv) != DCMD_OK) { 3752 return (WALK_ERR); 3753 } 3754 } else { 3755 if (mdb_call_dcmd("zfs_ace0", addr, 3756 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 3757 acl_args->a_argv) != DCMD_OK) { 3758 return (WALK_ERR); 3759 } 3760 } 3761 acl_args->a_flags = DCMD_LOOP; 3762 return (WALK_NEXT); 3763 } 3764 3765 /* ARGSUSED */ 3766 static int 3767 acl_cb(uintptr_t addr, const void *unknown, void *arg) 3768 { 3769 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 3770 3771 if (acl_args->a_version == 1) { 3772 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 3773 arg, addr) != 0) { 3774 mdb_warn("can't walk ACEs"); 3775 return (DCMD_ERR); 3776 } 3777 } else { 3778 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 3779 arg, addr) != 0) { 3780 mdb_warn("can't walk ACEs"); 3781 return (DCMD_ERR); 3782 } 3783 } 3784 return (WALK_NEXT); 3785 } 3786 3787 /* ARGSUSED */ 3788 static int 3789 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3790 { 3791 zfs_acl_t zacl; 3792 int verbose = FALSE; 3793 acl_dump_args_t acl_args; 3794 3795 if (!(flags & DCMD_ADDRSPEC)) 3796 return (DCMD_USAGE); 3797 3798 if (mdb_getopts(argc, argv, 3799 'v', MDB_OPT_SETBITS, TRUE, &verbose, NULL) != argc) 3800 return (DCMD_USAGE); 3801 3802 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 3803 mdb_warn("failed to read zfs_acl_t"); 3804 return (DCMD_ERR); 3805 } 3806 3807 acl_args.a_argc = argc; 3808 acl_args.a_argv = argv; 3809 acl_args.a_version = zacl.z_version; 3810 acl_args.a_flags = DCMD_LOOPFIRST; 3811 3812 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 3813 mdb_warn("can't walk ACL"); 3814 return (DCMD_ERR); 3815 } 3816 3817 return (DCMD_OK); 3818 } 3819 3820 /* ARGSUSED */ 3821 static int 3822 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 3823 { 3824 if (wsp->walk_addr == 0) { 3825 mdb_warn("must supply address of zfs_acl_node_t\n"); 3826 return (WALK_ERR); 3827 } 3828 3829 wsp->walk_addr += 3830 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); 3831 3832 if (mdb_layered_walk("list", wsp) == -1) { 3833 mdb_warn("failed to walk 'list'\n"); 3834 return (WALK_ERR); 3835 } 3836 3837 return (WALK_NEXT); 3838 } 3839 3840 static int 3841 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 3842 { 3843 zfs_acl_node_t aclnode; 3844 3845 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 3846 wsp->walk_addr) == -1) { 3847 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 3848 return (WALK_ERR); 3849 } 3850 3851 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 3852 } 3853 3854 typedef struct ace_walk_data { 3855 int ace_count; 3856 int ace_version; 3857 } ace_walk_data_t; 3858 3859 static int 3860 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 3861 int ace_count, uintptr_t ace_data) 3862 { 3863 ace_walk_data_t *ace_walk_data; 3864 3865 if (wsp->walk_addr == 0) { 3866 mdb_warn("must supply address of zfs_acl_node_t\n"); 3867 return (WALK_ERR); 3868 } 3869 3870 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 3871 3872 ace_walk_data->ace_count = ace_count; 3873 ace_walk_data->ace_version = version; 3874 3875 wsp->walk_addr = ace_data; 3876 wsp->walk_data = ace_walk_data; 3877 3878 return (WALK_NEXT); 3879 } 3880 3881 static int 3882 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 3883 { 3884 static int gotid; 3885 static mdb_ctf_id_t acl_id; 3886 int z_ace_count; 3887 uintptr_t z_acldata; 3888 3889 if (!gotid) { 3890 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 3891 &acl_id) == -1) { 3892 mdb_warn("couldn't find struct zfs_acl_node"); 3893 return (DCMD_ERR); 3894 } 3895 gotid = TRUE; 3896 } 3897 3898 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 3899 return (DCMD_ERR); 3900 } 3901 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 3902 return (DCMD_ERR); 3903 } 3904 3905 return (zfs_aces_walk_init_common(wsp, version, 3906 z_ace_count, z_acldata)); 3907 } 3908 3909 /* ARGSUSED */ 3910 static int 3911 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 3912 { 3913 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 3914 } 3915 3916 /* ARGSUSED */ 3917 static int 3918 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 3919 { 3920 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 3921 } 3922 3923 static int 3924 zfs_aces_walk_step(mdb_walk_state_t *wsp) 3925 { 3926 ace_walk_data_t *ace_data = wsp->walk_data; 3927 zfs_ace_t zace; 3928 ace_t *acep; 3929 int status; 3930 int entry_type; 3931 int allow_type; 3932 uintptr_t ptr; 3933 3934 if (ace_data->ace_count == 0) 3935 return (WALK_DONE); 3936 3937 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 3938 mdb_warn("failed to read zfs_ace_t at %#lx", 3939 wsp->walk_addr); 3940 return (WALK_ERR); 3941 } 3942 3943 switch (ace_data->ace_version) { 3944 case 0: 3945 acep = (ace_t *)&zace; 3946 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 3947 allow_type = acep->a_type; 3948 break; 3949 case 1: 3950 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 3951 allow_type = zace.z_hdr.z_type; 3952 break; 3953 default: 3954 return (WALK_ERR); 3955 } 3956 3957 ptr = (uintptr_t)wsp->walk_addr; 3958 switch (entry_type) { 3959 case ACE_OWNER: 3960 case ACE_EVERYONE: 3961 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 3962 ptr += ace_data->ace_version == 0 ? 3963 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 3964 break; 3965 case ACE_IDENTIFIER_GROUP: 3966 default: 3967 switch (allow_type) { 3968 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 3969 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 3970 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 3971 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 3972 ptr += ace_data->ace_version == 0 ? 3973 sizeof (ace_t) : sizeof (zfs_object_ace_t); 3974 break; 3975 default: 3976 ptr += ace_data->ace_version == 0 ? 3977 sizeof (ace_t) : sizeof (zfs_ace_t); 3978 break; 3979 } 3980 } 3981 3982 ace_data->ace_count--; 3983 status = wsp->walk_callback(wsp->walk_addr, 3984 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 3985 3986 wsp->walk_addr = ptr; 3987 return (status); 3988 } 3989 3990 typedef struct mdb_zfs_rrwlock { 3991 uintptr_t rr_writer; 3992 boolean_t rr_writer_wanted; 3993 } mdb_zfs_rrwlock_t; 3994 3995 static uint_t rrw_key; 3996 3997 /* ARGSUSED */ 3998 static int 3999 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 4000 { 4001 mdb_zfs_rrwlock_t rrw; 4002 4003 if (rrw_key == 0) { 4004 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) 4005 return (DCMD_ERR); 4006 } 4007 4008 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 4009 0) == -1) 4010 return (DCMD_ERR); 4011 4012 if (rrw.rr_writer != 0) { 4013 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer); 4014 return (DCMD_OK); 4015 } 4016 4017 if (rrw.rr_writer_wanted) { 4018 mdb_printf("writer wanted\n"); 4019 } 4020 4021 mdb_printf("anonymous references:\n"); 4022 (void) mdb_call_dcmd("zfs_refcount", addr + 4023 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), 4024 DCMD_ADDRSPEC, 0, NULL); 4025 4026 mdb_printf("linked references:\n"); 4027 (void) mdb_call_dcmd("zfs_refcount", addr + 4028 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), 4029 DCMD_ADDRSPEC, 0, NULL); 4030 4031 /* 4032 * XXX This should find references from 4033 * "::walk thread | ::tsd -v <rrw_key>", but there is no support 4034 * for programmatic consumption of dcmds, so this would be 4035 * difficult, potentially requiring reimplementing ::tsd (both 4036 * user and kernel versions) in this MDB module. 4037 */ 4038 4039 return (DCMD_OK); 4040 } 4041 4042 typedef struct mdb_arc_buf_hdr_t { 4043 uint16_t b_psize; 4044 uint16_t b_lsize; 4045 struct { 4046 uint32_t b_bufcnt; 4047 uintptr_t b_state; 4048 } b_l1hdr; 4049 } mdb_arc_buf_hdr_t; 4050 4051 enum arc_cflags { 4052 ARC_CFLAG_VERBOSE = 1 << 0, 4053 ARC_CFLAG_ANON = 1 << 1, 4054 ARC_CFLAG_MRU = 1 << 2, 4055 ARC_CFLAG_MFU = 1 << 3, 4056 ARC_CFLAG_BUFS = 1 << 4, 4057 }; 4058 4059 typedef struct arc_compression_stats_data { 4060 GElf_Sym anon_sym; /* ARC_anon symbol */ 4061 GElf_Sym mru_sym; /* ARC_mru symbol */ 4062 GElf_Sym mrug_sym; /* ARC_mru_ghost symbol */ 4063 GElf_Sym mfu_sym; /* ARC_mfu symbol */ 4064 GElf_Sym mfug_sym; /* ARC_mfu_ghost symbol */ 4065 GElf_Sym l2c_sym; /* ARC_l2c_only symbol */ 4066 uint64_t *anon_c_hist; /* histogram of compressed sizes in anon */ 4067 uint64_t *anon_u_hist; /* histogram of uncompressed sizes in anon */ 4068 uint64_t *anon_bufs; /* histogram of buffer counts in anon state */ 4069 uint64_t *mru_c_hist; /* histogram of compressed sizes in mru */ 4070 uint64_t *mru_u_hist; /* histogram of uncompressed sizes in mru */ 4071 uint64_t *mru_bufs; /* histogram of buffer counts in mru */ 4072 uint64_t *mfu_c_hist; /* histogram of compressed sizes in mfu */ 4073 uint64_t *mfu_u_hist; /* histogram of uncompressed sizes in mfu */ 4074 uint64_t *mfu_bufs; /* histogram of buffer counts in mfu */ 4075 uint64_t *all_c_hist; /* histogram of compressed anon + mru + mfu */ 4076 uint64_t *all_u_hist; /* histogram of uncompressed anon + mru + mfu */ 4077 uint64_t *all_bufs; /* histogram of buffer counts in all states */ 4078 int arc_cflags; /* arc compression flags, specified by user */ 4079 int hist_nbuckets; /* number of buckets in each histogram */ 4080 4081 ulong_t l1hdr_off; /* offset of b_l1hdr in arc_buf_hdr_t */ 4082 } arc_compression_stats_data_t; 4083 4084 int 4085 highbit64(uint64_t i) 4086 { 4087 int h = 1; 4088 4089 if (i == 0) 4090 return (0); 4091 if (i & 0xffffffff00000000ULL) { 4092 h += 32; i >>= 32; 4093 } 4094 if (i & 0xffff0000) { 4095 h += 16; i >>= 16; 4096 } 4097 if (i & 0xff00) { 4098 h += 8; i >>= 8; 4099 } 4100 if (i & 0xf0) { 4101 h += 4; i >>= 4; 4102 } 4103 if (i & 0xc) { 4104 h += 2; i >>= 2; 4105 } 4106 if (i & 0x2) { 4107 h += 1; 4108 } 4109 return (h); 4110 } 4111 4112 /* ARGSUSED */ 4113 static int 4114 arc_compression_stats_cb(uintptr_t addr, const void *unknown, void *arg) 4115 { 4116 arc_compression_stats_data_t *data = arg; 4117 arc_flags_t flags; 4118 mdb_arc_buf_hdr_t hdr; 4119 int cbucket, ubucket, bufcnt; 4120 4121 /* 4122 * mdb_ctf_vread() uses the sizeof the target type (e.g. 4123 * sizeof (arc_buf_hdr_t) in the target) to read in the entire contents 4124 * of the target type into a buffer and then copy the values of the 4125 * desired members from the mdb typename (e.g. mdb_arc_buf_hdr_t) from 4126 * this buffer. Unfortunately, the way arc_buf_hdr_t is used by zfs, 4127 * the actual size allocated by the kernel for arc_buf_hdr_t is often 4128 * smaller than `sizeof (arc_buf_hdr_t)` (see the definitions of 4129 * l1arc_buf_hdr_t and arc_buf_hdr_t in 4130 * usr/src/uts/common/fs/zfs/arc.c). Attempting to read the entire 4131 * contents of arc_buf_hdr_t from the target (as mdb_ctf_vread() does) 4132 * can cause an error if the allocated size is indeed smaller--it's 4133 * possible that the 'missing' trailing members of arc_buf_hdr_t 4134 * (l1arc_buf_hdr_t and/or arc_buf_hdr_crypt_t) may fall into unmapped 4135 * memory. 4136 * 4137 * We use the GETMEMB macro instead which performs an mdb_vread() 4138 * but only reads enough of the target to retrieve the desired struct 4139 * member instead of the entire struct. 4140 */ 4141 if (GETMEMB(addr, "arc_buf_hdr", b_flags, flags) == -1) 4142 return (WALK_ERR); 4143 4144 /* 4145 * We only count headers that have data loaded in the kernel. 4146 * This means an L1 header must be present as well as the data 4147 * that corresponds to the L1 header. If there's no L1 header, 4148 * we can skip the arc_buf_hdr_t completely. If it's present, we 4149 * must look at the ARC state (b_l1hdr.b_state) to determine if 4150 * the data is present. 4151 */ 4152 if ((flags & ARC_FLAG_HAS_L1HDR) == 0) 4153 return (WALK_NEXT); 4154 4155 if (GETMEMB(addr, "arc_buf_hdr", b_psize, hdr.b_psize) == -1 || 4156 GETMEMB(addr, "arc_buf_hdr", b_lsize, hdr.b_lsize) == -1 || 4157 GETMEMB(addr + data->l1hdr_off, "l1arc_buf_hdr", b_bufcnt, 4158 hdr.b_l1hdr.b_bufcnt) == -1 || 4159 GETMEMB(addr + data->l1hdr_off, "l1arc_buf_hdr", b_state, 4160 hdr.b_l1hdr.b_state) == -1) 4161 return (WALK_ERR); 4162 4163 /* 4164 * Headers in the ghost states, or the l2c_only state don't have 4165 * arc buffers linked off of them. Thus, their compressed size 4166 * is meaningless, so we skip these from the stats. 4167 */ 4168 if (hdr.b_l1hdr.b_state == data->mrug_sym.st_value || 4169 hdr.b_l1hdr.b_state == data->mfug_sym.st_value || 4170 hdr.b_l1hdr.b_state == data->l2c_sym.st_value) { 4171 return (WALK_NEXT); 4172 } 4173 4174 /* 4175 * The physical size (compressed) and logical size 4176 * (uncompressed) are in units of SPA_MINBLOCKSIZE. By default, 4177 * we use the log2 of this value (rounded down to the nearest 4178 * integer) to determine the bucket to assign this header to. 4179 * Thus, the histogram is logarithmic with respect to the size 4180 * of the header. For example, the following is a mapping of the 4181 * bucket numbers and the range of header sizes they correspond to: 4182 * 4183 * 0: 0 byte headers 4184 * 1: 512 byte headers 4185 * 2: [1024 - 2048) byte headers 4186 * 3: [2048 - 4096) byte headers 4187 * 4: [4096 - 8192) byte headers 4188 * 5: [8192 - 16394) byte headers 4189 * 6: [16384 - 32768) byte headers 4190 * 7: [32768 - 65536) byte headers 4191 * 8: [65536 - 131072) byte headers 4192 * 9: 131072 byte headers 4193 * 4194 * If the ARC_CFLAG_VERBOSE flag was specified, we use the 4195 * physical and logical sizes directly. Thus, the histogram will 4196 * no longer be logarithmic; instead it will be linear with 4197 * respect to the size of the header. The following is a mapping 4198 * of the first many bucket numbers and the header size they 4199 * correspond to: 4200 * 4201 * 0: 0 byte headers 4202 * 1: 512 byte headers 4203 * 2: 1024 byte headers 4204 * 3: 1536 byte headers 4205 * 4: 2048 byte headers 4206 * 5: 2560 byte headers 4207 * 6: 3072 byte headers 4208 * 4209 * And so on. Keep in mind that a range of sizes isn't used in 4210 * the case of linear scale because the headers can only 4211 * increment or decrement in sizes of 512 bytes. So, it's not 4212 * possible for a header to be sized in between whats listed 4213 * above. 4214 * 4215 * Also, the above mapping values were calculated assuming a 4216 * SPA_MINBLOCKSHIFT of 512 bytes and a SPA_MAXBLOCKSIZE of 128K. 4217 */ 4218 4219 if (data->arc_cflags & ARC_CFLAG_VERBOSE) { 4220 cbucket = hdr.b_psize; 4221 ubucket = hdr.b_lsize; 4222 } else { 4223 cbucket = highbit64(hdr.b_psize); 4224 ubucket = highbit64(hdr.b_lsize); 4225 } 4226 4227 bufcnt = hdr.b_l1hdr.b_bufcnt; 4228 if (bufcnt >= data->hist_nbuckets) 4229 bufcnt = data->hist_nbuckets - 1; 4230 4231 /* Ensure we stay within the bounds of the histogram array */ 4232 ASSERT3U(cbucket, <, data->hist_nbuckets); 4233 ASSERT3U(ubucket, <, data->hist_nbuckets); 4234 4235 if (hdr.b_l1hdr.b_state == data->anon_sym.st_value) { 4236 data->anon_c_hist[cbucket]++; 4237 data->anon_u_hist[ubucket]++; 4238 data->anon_bufs[bufcnt]++; 4239 } else if (hdr.b_l1hdr.b_state == data->mru_sym.st_value) { 4240 data->mru_c_hist[cbucket]++; 4241 data->mru_u_hist[ubucket]++; 4242 data->mru_bufs[bufcnt]++; 4243 } else if (hdr.b_l1hdr.b_state == data->mfu_sym.st_value) { 4244 data->mfu_c_hist[cbucket]++; 4245 data->mfu_u_hist[ubucket]++; 4246 data->mfu_bufs[bufcnt]++; 4247 } 4248 4249 data->all_c_hist[cbucket]++; 4250 data->all_u_hist[ubucket]++; 4251 data->all_bufs[bufcnt]++; 4252 4253 return (WALK_NEXT); 4254 } 4255 4256 /* ARGSUSED */ 4257 static int 4258 arc_compression_stats(uintptr_t addr, uint_t flags, int argc, 4259 const mdb_arg_t *argv) 4260 { 4261 arc_compression_stats_data_t data = { 0 }; 4262 unsigned int max_shifted = SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT; 4263 unsigned int hist_size; 4264 char range[32]; 4265 int rc = DCMD_OK; 4266 int off; 4267 4268 if (mdb_getopts(argc, argv, 4269 'v', MDB_OPT_SETBITS, ARC_CFLAG_VERBOSE, &data.arc_cflags, 4270 'a', MDB_OPT_SETBITS, ARC_CFLAG_ANON, &data.arc_cflags, 4271 'b', MDB_OPT_SETBITS, ARC_CFLAG_BUFS, &data.arc_cflags, 4272 'r', MDB_OPT_SETBITS, ARC_CFLAG_MRU, &data.arc_cflags, 4273 'f', MDB_OPT_SETBITS, ARC_CFLAG_MFU, &data.arc_cflags, 4274 NULL) != argc) 4275 return (DCMD_USAGE); 4276 4277 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_anon", &data.anon_sym) || 4278 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru", &data.mru_sym) || 4279 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru_ghost", &data.mrug_sym) || 4280 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu", &data.mfu_sym) || 4281 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu_ghost", &data.mfug_sym) || 4282 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_l2c_only", &data.l2c_sym)) { 4283 mdb_warn("can't find arc state symbol"); 4284 return (DCMD_ERR); 4285 } 4286 4287 /* 4288 * Determine the maximum expected size for any header, and use 4289 * this to determine the number of buckets needed for each 4290 * histogram. If ARC_CFLAG_VERBOSE is specified, this value is 4291 * used directly; otherwise the log2 of the maximum size is 4292 * used. Thus, if using a log2 scale there's a maximum of 10 4293 * possible buckets, while the linear scale (when using 4294 * ARC_CFLAG_VERBOSE) has a maximum of 257 buckets. 4295 */ 4296 if (data.arc_cflags & ARC_CFLAG_VERBOSE) 4297 data.hist_nbuckets = max_shifted + 1; 4298 else 4299 data.hist_nbuckets = highbit64(max_shifted) + 1; 4300 4301 hist_size = sizeof (uint64_t) * data.hist_nbuckets; 4302 4303 data.anon_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 4304 data.anon_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4305 data.anon_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4306 4307 data.mru_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 4308 data.mru_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4309 data.mru_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4310 4311 data.mfu_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 4312 data.mfu_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4313 data.mfu_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4314 4315 data.all_c_hist = mdb_zalloc(hist_size, UM_SLEEP); 4316 data.all_u_hist = mdb_zalloc(hist_size, UM_SLEEP); 4317 data.all_bufs = mdb_zalloc(hist_size, UM_SLEEP); 4318 4319 if ((off = mdb_ctf_offsetof_by_name(ZFS_STRUCT "arc_buf_hdr", 4320 "b_l1hdr")) == -1) { 4321 mdb_warn("could not get offset of b_l1hdr from arc_buf_hdr_t"); 4322 rc = DCMD_ERR; 4323 goto out; 4324 } 4325 data.l1hdr_off = off; 4326 4327 if (mdb_walk("arc_buf_hdr_t_full", arc_compression_stats_cb, 4328 &data) != 0) { 4329 mdb_warn("can't walk arc_buf_hdr's"); 4330 rc = DCMD_ERR; 4331 goto out; 4332 } 4333 4334 if (data.arc_cflags & ARC_CFLAG_VERBOSE) { 4335 rc = mdb_snprintf(range, sizeof (range), 4336 "[n*%llu, (n+1)*%llu)", SPA_MINBLOCKSIZE, 4337 SPA_MINBLOCKSIZE); 4338 } else { 4339 rc = mdb_snprintf(range, sizeof (range), 4340 "[2^(n-1)*%llu, 2^n*%llu)", SPA_MINBLOCKSIZE, 4341 SPA_MINBLOCKSIZE); 4342 } 4343 4344 if (rc < 0) { 4345 /* snprintf failed, abort the dcmd */ 4346 rc = DCMD_ERR; 4347 goto out; 4348 } else { 4349 /* snprintf succeeded above, reset return code */ 4350 rc = DCMD_OK; 4351 } 4352 4353 if (data.arc_cflags & ARC_CFLAG_ANON) { 4354 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4355 mdb_printf("Histogram of the number of anon buffers " 4356 "that are associated with an arc hdr.\n"); 4357 dump_histogram(data.anon_bufs, data.hist_nbuckets, 0); 4358 mdb_printf("\n"); 4359 } 4360 mdb_printf("Histogram of compressed anon buffers.\n" 4361 "Each bucket represents buffers of size: %s.\n", range); 4362 dump_histogram(data.anon_c_hist, data.hist_nbuckets, 0); 4363 mdb_printf("\n"); 4364 4365 mdb_printf("Histogram of uncompressed anon buffers.\n" 4366 "Each bucket represents buffers of size: %s.\n", range); 4367 dump_histogram(data.anon_u_hist, data.hist_nbuckets, 0); 4368 mdb_printf("\n"); 4369 } 4370 4371 if (data.arc_cflags & ARC_CFLAG_MRU) { 4372 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4373 mdb_printf("Histogram of the number of mru buffers " 4374 "that are associated with an arc hdr.\n"); 4375 dump_histogram(data.mru_bufs, data.hist_nbuckets, 0); 4376 mdb_printf("\n"); 4377 } 4378 mdb_printf("Histogram of compressed mru buffers.\n" 4379 "Each bucket represents buffers of size: %s.\n", range); 4380 dump_histogram(data.mru_c_hist, data.hist_nbuckets, 0); 4381 mdb_printf("\n"); 4382 4383 mdb_printf("Histogram of uncompressed mru buffers.\n" 4384 "Each bucket represents buffers of size: %s.\n", range); 4385 dump_histogram(data.mru_u_hist, data.hist_nbuckets, 0); 4386 mdb_printf("\n"); 4387 } 4388 4389 if (data.arc_cflags & ARC_CFLAG_MFU) { 4390 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4391 mdb_printf("Histogram of the number of mfu buffers " 4392 "that are associated with an arc hdr.\n"); 4393 dump_histogram(data.mfu_bufs, data.hist_nbuckets, 0); 4394 mdb_printf("\n"); 4395 } 4396 4397 mdb_printf("Histogram of compressed mfu buffers.\n" 4398 "Each bucket represents buffers of size: %s.\n", range); 4399 dump_histogram(data.mfu_c_hist, data.hist_nbuckets, 0); 4400 mdb_printf("\n"); 4401 4402 mdb_printf("Histogram of uncompressed mfu buffers.\n" 4403 "Each bucket represents buffers of size: %s.\n", range); 4404 dump_histogram(data.mfu_u_hist, data.hist_nbuckets, 0); 4405 mdb_printf("\n"); 4406 } 4407 4408 if (data.arc_cflags & ARC_CFLAG_BUFS) { 4409 mdb_printf("Histogram of all buffers that " 4410 "are associated with an arc hdr.\n"); 4411 dump_histogram(data.all_bufs, data.hist_nbuckets, 0); 4412 mdb_printf("\n"); 4413 } 4414 4415 mdb_printf("Histogram of all compressed buffers.\n" 4416 "Each bucket represents buffers of size: %s.\n", range); 4417 dump_histogram(data.all_c_hist, data.hist_nbuckets, 0); 4418 mdb_printf("\n"); 4419 4420 mdb_printf("Histogram of all uncompressed buffers.\n" 4421 "Each bucket represents buffers of size: %s.\n", range); 4422 dump_histogram(data.all_u_hist, data.hist_nbuckets, 0); 4423 4424 out: 4425 mdb_free(data.anon_c_hist, hist_size); 4426 mdb_free(data.anon_u_hist, hist_size); 4427 mdb_free(data.anon_bufs, hist_size); 4428 4429 mdb_free(data.mru_c_hist, hist_size); 4430 mdb_free(data.mru_u_hist, hist_size); 4431 mdb_free(data.mru_bufs, hist_size); 4432 4433 mdb_free(data.mfu_c_hist, hist_size); 4434 mdb_free(data.mfu_u_hist, hist_size); 4435 mdb_free(data.mfu_bufs, hist_size); 4436 4437 mdb_free(data.all_c_hist, hist_size); 4438 mdb_free(data.all_u_hist, hist_size); 4439 mdb_free(data.all_bufs, hist_size); 4440 4441 return (rc); 4442 } 4443 4444 typedef struct mdb_range_seg64 { 4445 uint64_t rs_start; 4446 uint64_t rs_end; 4447 } mdb_range_seg64_t; 4448 4449 typedef struct mdb_range_seg32 { 4450 uint32_t rs_start; 4451 uint32_t rs_end; 4452 } mdb_range_seg32_t; 4453 4454 /* ARGSUSED */ 4455 static int 4456 range_tree_cb(uintptr_t addr, const void *unknown, void *arg) 4457 { 4458 mdb_range_tree_t *rt = (mdb_range_tree_t *)arg; 4459 uint64_t start, end; 4460 4461 if (rt->rt_type == RANGE_SEG64) { 4462 mdb_range_seg64_t rs; 4463 4464 if (mdb_ctf_vread(&rs, ZFS_STRUCT "range_seg64", 4465 "mdb_range_seg64_t", addr, 0) == -1) 4466 return (DCMD_ERR); 4467 start = rs.rs_start; 4468 end = rs.rs_end; 4469 } else { 4470 ASSERT3U(rt->rt_type, ==, RANGE_SEG32); 4471 mdb_range_seg32_t rs; 4472 4473 if (mdb_ctf_vread(&rs, ZFS_STRUCT "range_seg32", 4474 "mdb_range_seg32_t", addr, 0) == -1) 4475 return (DCMD_ERR); 4476 start = ((uint64_t)rs.rs_start << rt->rt_shift) + rt->rt_start; 4477 end = ((uint64_t)rs.rs_end << rt->rt_shift) + rt->rt_start; 4478 } 4479 4480 mdb_printf("\t[%llx %llx) (length %llx)\n", start, end, end - start); 4481 4482 return (0); 4483 } 4484 4485 /* ARGSUSED */ 4486 static int 4487 range_tree(uintptr_t addr, uint_t flags, int argc, 4488 const mdb_arg_t *argv) 4489 { 4490 mdb_range_tree_t rt; 4491 uintptr_t btree_addr; 4492 4493 if (!(flags & DCMD_ADDRSPEC)) 4494 return (DCMD_USAGE); 4495 4496 if (mdb_ctf_vread(&rt, ZFS_STRUCT "range_tree", "mdb_range_tree_t", 4497 addr, 0) == -1) 4498 return (DCMD_ERR); 4499 4500 mdb_printf("%p: range tree of %llu entries, %llu bytes\n", 4501 addr, rt.rt_root.bt_num_elems, rt.rt_space); 4502 4503 btree_addr = addr + 4504 mdb_ctf_offsetof_by_name(ZFS_STRUCT "range_tree", "rt_root"); 4505 4506 if (mdb_pwalk("zfs_btree", range_tree_cb, &rt, btree_addr) != 0) { 4507 mdb_warn("can't walk range_tree segments"); 4508 return (DCMD_ERR); 4509 } 4510 return (DCMD_OK); 4511 } 4512 4513 typedef struct mdb_spa_log_sm { 4514 uint64_t sls_sm_obj; 4515 uint64_t sls_txg; 4516 uint64_t sls_nblocks; 4517 uint64_t sls_mscount; 4518 } mdb_spa_log_sm_t; 4519 4520 /* ARGSUSED */ 4521 static int 4522 logsm_stats_cb(uintptr_t addr, const void *unknown, void *arg) 4523 { 4524 mdb_spa_log_sm_t sls; 4525 if (mdb_ctf_vread(&sls, ZFS_STRUCT "spa_log_sm", "mdb_spa_log_sm_t", 4526 addr, 0) == -1) 4527 return (WALK_ERR); 4528 4529 mdb_printf("%7lld %7lld %7lld %7lld\n", 4530 sls.sls_txg, sls.sls_nblocks, sls.sls_mscount, sls.sls_sm_obj); 4531 4532 return (WALK_NEXT); 4533 } 4534 typedef struct mdb_log_summary_entry { 4535 uint64_t lse_start; 4536 uint64_t lse_blkcount; 4537 uint64_t lse_mscount; 4538 } mdb_log_summary_entry_t; 4539 4540 /* ARGSUSED */ 4541 static int 4542 logsm_summary_cb(uintptr_t addr, const void *unknown, void *arg) 4543 { 4544 mdb_log_summary_entry_t lse; 4545 if (mdb_ctf_vread(&lse, ZFS_STRUCT "log_summary_entry", 4546 "mdb_log_summary_entry_t", addr, 0) == -1) 4547 return (WALK_ERR); 4548 4549 mdb_printf("%7lld %7lld %7lld\n", 4550 lse.lse_start, lse.lse_blkcount, lse.lse_mscount); 4551 return (WALK_NEXT); 4552 } 4553 4554 /* ARGSUSED */ 4555 static int 4556 logsm_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 4557 { 4558 if (!(flags & DCMD_ADDRSPEC)) 4559 return (DCMD_USAGE); 4560 4561 uintptr_t sls_avl_addr = addr + 4562 mdb_ctf_offsetof_by_name(ZFS_STRUCT "spa", "spa_sm_logs_by_txg"); 4563 uintptr_t summary_addr = addr + 4564 mdb_ctf_offsetof_by_name(ZFS_STRUCT "spa", "spa_log_summary"); 4565 4566 mdb_printf("Log Entries:\n"); 4567 mdb_printf("%7s %7s %7s %7s\n", "txg", "blk", "ms", "obj"); 4568 if (mdb_pwalk("avl", logsm_stats_cb, NULL, sls_avl_addr) != 0) 4569 return (DCMD_ERR); 4570 4571 mdb_printf("\nSummary Entries:\n"); 4572 mdb_printf("%7s %7s %7s\n", "txg", "blk", "ms"); 4573 if (mdb_pwalk("list", logsm_summary_cb, NULL, summary_addr) != 0) 4574 return (DCMD_ERR); 4575 4576 return (DCMD_OK); 4577 } 4578 4579 /* 4580 * MDB module linkage information: 4581 * 4582 * We declare a list of structures describing our dcmds, and a function 4583 * named _mdb_init to return a pointer to our module information. 4584 */ 4585 4586 static const mdb_dcmd_t dcmds[] = { 4587 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 4588 { "blkptr", ":", "print blkptr_t", blkptr }, 4589 { "dva", ":", "print dva_t", dva }, 4590 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 4591 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 4592 { "dbufs", 4593 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 4594 "[-o object | \"mdn\"] \n" 4595 "\t[-l level] [-b blkid | \"bonus\"]", 4596 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 4597 { "abuf_find", "dva_word[0] dva_word[1]", 4598 "find arc_buf_hdr_t of a specified DVA", 4599 abuf_find }, 4600 { "logsm_stats", ":", "print log space map statistics of a spa_t", 4601 logsm_stats}, 4602 { "spa", "?[-cevmMh]\n" 4603 "\t-c display spa config\n" 4604 "\t-e display vdev statistics\n" 4605 "\t-v display vdev information\n" 4606 "\t-m display metaslab statistics\n" 4607 "\t-M display metaslab group statistics\n" 4608 "\t-h display histogram (requires -m or -M)\n", 4609 "spa_t summary", spa_print }, 4610 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 4611 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 4612 { "spa_vdevs", ":[-emMh]\n" 4613 "\t-e display vdev statistics\n" 4614 "\t-m dispaly metaslab statistics\n" 4615 "\t-M display metaslab group statistic\n" 4616 "\t-h display histogram (requires -m or -M)\n", 4617 "given a spa_t, print vdev summary", spa_vdevs }, 4618 { "sm_entries", "<buffer length in bytes>", 4619 "print out space map entries from a buffer decoded", 4620 sm_entries}, 4621 { "vdev", ":[-remMh]\n" 4622 "\t-r display recursively\n" 4623 "\t-e display statistics\n" 4624 "\t-m display metaslab statistics (top level vdev only)\n" 4625 "\t-M display metaslab group statistics (top level vdev only)\n" 4626 "\t-h display histogram (requires -m or -M)\n", 4627 "vdev_t summary", vdev_print }, 4628 { "zio", ":[-cpr]\n" 4629 "\t-c display children\n" 4630 "\t-p display parents\n" 4631 "\t-r display recursively", 4632 "zio_t summary", zio_print }, 4633 { "zio_state", "?", "print out all zio_t structures on system or " 4634 "for a particular pool", zio_state }, 4635 { "zfs_blkstats", ":[-v]", 4636 "given a spa_t, print block type stats from last scrub", 4637 zfs_blkstats }, 4638 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 4639 { "zfs_refcount", ":[-r]\n" 4640 "\t-r display recently removed references", 4641 "print zfs_refcount_t holders", zfs_refcount }, 4642 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 4643 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 4644 zfs_acl_dump }, 4645 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 4646 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 4647 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 4648 sa_attr_table}, 4649 { "sa_attr", ": attr_id", 4650 "print SA attribute address when given sa_handle_t", sa_attr_print}, 4651 { "zfs_dbgmsg", ":[-var]", 4652 "print zfs debug log", dbgmsg}, 4653 { "rrwlock", ":", 4654 "print rrwlock_t, including readers", rrwlock}, 4655 { "metaslab_weight", "weight", 4656 "print metaslab weight", metaslab_weight}, 4657 { "metaslab_trace", ":", 4658 "print metaslab allocation trace records", metaslab_trace}, 4659 { "arc_compression_stats", ":[-vabrf]\n" 4660 "\t-v verbose, display a linearly scaled histogram\n" 4661 "\t-a display ARC_anon state statistics individually\n" 4662 "\t-r display ARC_mru state statistics individually\n" 4663 "\t-f display ARC_mfu state statistics individually\n" 4664 "\t-b display histogram of buffer counts\n", 4665 "print a histogram of compressed arc buffer sizes", 4666 arc_compression_stats}, 4667 { "range_tree", ":", 4668 "print entries in range_tree_t", range_tree}, 4669 { NULL } 4670 }; 4671 4672 static const mdb_walker_t walkers[] = { 4673 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 4674 txg_list_walk_init, txg_list_walk_step, NULL }, 4675 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 4676 txg_list0_walk_init, txg_list_walk_step, NULL }, 4677 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 4678 txg_list1_walk_init, txg_list_walk_step, NULL }, 4679 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 4680 txg_list2_walk_init, txg_list_walk_step, NULL }, 4681 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 4682 txg_list3_walk_init, txg_list_walk_step, NULL }, 4683 { "zio", "walk all zio structures, optionally for a particular spa_t", 4684 zio_walk_init, zio_walk_step, NULL }, 4685 { "zio_root", 4686 "walk all root zio_t structures, optionally for a particular spa_t", 4687 zio_walk_init, zio_walk_root_step, NULL }, 4688 { "spa", "walk all spa_t entries in the namespace", 4689 spa_walk_init, spa_walk_step, NULL }, 4690 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 4691 metaslab_walk_init, metaslab_walk_step, NULL }, 4692 { "multilist", "given a multilist_t *, walk all list_t structures", 4693 multilist_walk_init, multilist_walk_step, NULL }, 4694 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 4695 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 4696 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 4697 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 4698 { "zfs_acl_node_aces0", 4699 "given a zfs_acl_node_t, walk all ACEs as ace_t", 4700 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 4701 { "zfs_btree", "given a zfs_btree_t *, walk all entries", 4702 btree_walk_init, btree_walk_step, btree_walk_fini }, 4703 { NULL } 4704 }; 4705 4706 static const mdb_modinfo_t modinfo = { 4707 MDB_API_VERSION, dcmds, walkers 4708 }; 4709 4710 const mdb_modinfo_t * 4711 _mdb_init(void) 4712 { 4713 return (&modinfo); 4714 } 4715