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