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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <mdb/mdb_ctf.h> 29 #include <sys/zfs_context.h> 30 #include <sys/mdb_modapi.h> 31 #include <sys/dbuf.h> 32 #include <sys/dmu_objset.h> 33 #include <sys/dsl_dir.h> 34 #include <sys/dsl_pool.h> 35 #include <sys/metaslab_impl.h> 36 #include <sys/space_map.h> 37 #include <sys/list.h> 38 #include <sys/spa_impl.h> 39 #include <sys/vdev_impl.h> 40 #include <sys/zio_compress.h> 41 42 #ifndef _KERNEL 43 #include "../genunix/list.h" 44 #endif 45 46 #ifdef _KERNEL 47 #define ZFS_OBJ_NAME "zfs" 48 #else 49 #define ZFS_OBJ_NAME "libzpool.so.1" 50 #endif 51 52 static char * 53 local_strdup(const char *s) 54 { 55 char *s1 = mdb_alloc(strlen(s) + 1, UM_SLEEP); 56 57 (void) strcpy(s1, s); 58 return (s1); 59 } 60 61 static int 62 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 63 const char *member, int len, void *buf) 64 { 65 mdb_ctf_id_t id; 66 ulong_t off; 67 char name[64]; 68 69 if (idp == NULL) { 70 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 71 mdb_warn("couldn't find type %s", type); 72 return (DCMD_ERR); 73 } 74 idp = &id; 75 } else { 76 type = name; 77 mdb_ctf_type_name(*idp, name, sizeof (name)); 78 } 79 80 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 81 mdb_warn("couldn't find member %s of type %s\n", member, type); 82 return (DCMD_ERR); 83 } 84 if (off % 8 != 0) { 85 mdb_warn("member %s of type %s is unsupported bitfield", 86 member, type); 87 return (DCMD_ERR); 88 } 89 off /= 8; 90 91 if (mdb_vread(buf, len, addr + off) == -1) { 92 mdb_warn("failed to read %s from %s at %p", 93 member, type, addr + off); 94 return (DCMD_ERR); 95 } 96 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 97 98 return (0); 99 } 100 101 #define GETMEMB(addr, type, member, dest) \ 102 getmember(addr, #type, NULL, #member, sizeof (dest), &(dest)) 103 104 #define GETMEMBID(addr, ctfid, member, dest) \ 105 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 106 107 static int 108 getrefcount(uintptr_t addr, mdb_ctf_id_t *id, 109 const char *member, uint64_t *rc) 110 { 111 static int gotid; 112 static mdb_ctf_id_t rc_id; 113 ulong_t off; 114 115 if (!gotid) { 116 if (mdb_ctf_lookup_by_name("struct refcount", &rc_id) == -1) { 117 mdb_warn("couldn't find struct refcount"); 118 return (DCMD_ERR); 119 } 120 gotid = TRUE; 121 } 122 123 if (mdb_ctf_offsetof(*id, member, &off) == -1) { 124 char name[64]; 125 mdb_ctf_type_name(*id, name, sizeof (name)); 126 mdb_warn("couldn't find member %s of type %s\n", member, name); 127 return (DCMD_ERR); 128 } 129 off /= 8; 130 131 return (GETMEMBID(addr + off, &rc_id, rc_count, *rc)); 132 } 133 134 static int 135 read_symbol(char *sym_name, void **bufp) 136 { 137 GElf_Sym sym; 138 139 if (mdb_lookup_by_obj(MDB_TGT_OBJ_EVERY, sym_name, &sym)) { 140 mdb_warn("can't find symbol %s", sym_name); 141 return (DCMD_ERR); 142 } 143 144 *bufp = mdb_alloc(sym.st_size, UM_SLEEP); 145 146 if (mdb_vread(*bufp, sym.st_size, sym.st_value) == -1) { 147 mdb_warn("can't read data for symbol %s", sym_name); 148 mdb_free(*bufp, sym.st_size); 149 return (DCMD_ERR); 150 } 151 152 return (DCMD_OK); 153 } 154 155 static int verbose; 156 157 static int 158 freelist_walk_init(mdb_walk_state_t *wsp) 159 { 160 if (wsp->walk_addr == NULL) { 161 mdb_warn("must supply starting address\n"); 162 return (WALK_ERR); 163 } 164 165 wsp->walk_data = 0; /* Index into the freelist */ 166 return (WALK_NEXT); 167 } 168 169 static int 170 freelist_walk_step(mdb_walk_state_t *wsp) 171 { 172 uint64_t entry; 173 uintptr_t number = (uintptr_t)wsp->walk_data; 174 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID", 175 "INVALID", "INVALID", "INVALID", "INVALID" }; 176 int mapshift = SPA_MINBLOCKSHIFT; 177 178 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) { 179 mdb_warn("failed to read freelist entry %p", wsp->walk_addr); 180 return (WALK_DONE); 181 } 182 wsp->walk_addr += sizeof (entry); 183 wsp->walk_data = (void *)(number + 1); 184 185 if (SM_DEBUG_DECODE(entry)) { 186 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n", 187 number, 188 ddata[SM_DEBUG_ACTION_DECODE(entry)], 189 SM_DEBUG_TXG_DECODE(entry), 190 SM_DEBUG_SYNCPASS_DECODE(entry)); 191 } else { 192 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c " 193 "size=%06llx", number, 194 SM_OFFSET_DECODE(entry) << mapshift, 195 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) << 196 mapshift, 197 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F', 198 SM_RUN_DECODE(entry) << mapshift); 199 if (verbose) 200 mdb_printf(" (raw=%012llx)\n", entry); 201 mdb_printf("\n"); 202 } 203 return (WALK_NEXT); 204 } 205 206 207 static int 208 dataset_name(uintptr_t addr, char *buf) 209 { 210 static int gotid; 211 static mdb_ctf_id_t dd_id; 212 uintptr_t dd_parent; 213 char dd_myname[MAXNAMELEN]; 214 215 if (!gotid) { 216 if (mdb_ctf_lookup_by_name("struct dsl_dir", 217 &dd_id) == -1) { 218 mdb_warn("couldn't find struct dsl_dir"); 219 return (DCMD_ERR); 220 } 221 gotid = TRUE; 222 } 223 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 224 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 225 return (DCMD_ERR); 226 } 227 228 if (dd_parent) { 229 if (dataset_name(dd_parent, buf)) 230 return (DCMD_ERR); 231 strcat(buf, "/"); 232 } 233 234 if (dd_myname[0]) 235 strcat(buf, dd_myname); 236 else 237 strcat(buf, "???"); 238 239 return (0); 240 } 241 242 static int 243 objset_name(uintptr_t addr, char *buf) 244 { 245 static int gotid; 246 static mdb_ctf_id_t osi_id, ds_id; 247 uintptr_t os_dsl_dataset; 248 char ds_snapname[MAXNAMELEN]; 249 uintptr_t ds_dir; 250 251 buf[0] = '\0'; 252 253 if (!gotid) { 254 if (mdb_ctf_lookup_by_name("struct objset_impl", 255 &osi_id) == -1) { 256 mdb_warn("couldn't find struct objset_impl"); 257 return (DCMD_ERR); 258 } 259 if (mdb_ctf_lookup_by_name("struct dsl_dataset", 260 &ds_id) == -1) { 261 mdb_warn("couldn't find struct dsl_dataset"); 262 return (DCMD_ERR); 263 } 264 265 gotid = TRUE; 266 } 267 268 if (GETMEMBID(addr, &osi_id, os_dsl_dataset, os_dsl_dataset)) 269 return (DCMD_ERR); 270 271 if (os_dsl_dataset == 0) { 272 strcat(buf, "mos"); 273 return (0); 274 } 275 276 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 277 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 278 return (DCMD_ERR); 279 } 280 281 if (ds_dir && dataset_name(ds_dir, buf)) 282 return (DCMD_ERR); 283 284 if (ds_snapname[0]) { 285 strcat(buf, "@"); 286 strcat(buf, ds_snapname); 287 } 288 return (0); 289 } 290 291 static void 292 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val, 293 const char *prefix) 294 { 295 const char *cp; 296 size_t len = strlen(prefix); 297 298 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) { 299 if (strncmp(cp, prefix, len) == 0) 300 cp += len; 301 (void) strncpy(out, cp, size); 302 } else { 303 mdb_snprintf(out, size, "? (%d)", val); 304 } 305 } 306 307 /* ARGSUSED */ 308 static int 309 zio_pipeline(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 310 { 311 mdb_ctf_id_t pipe_enum; 312 int i; 313 char stage[1024]; 314 315 if (mdb_ctf_lookup_by_name("enum zio_stage", &pipe_enum) == -1) { 316 mdb_warn("Could not find enum zio_stage"); 317 return (DCMD_ERR); 318 } 319 320 for (i = 0; i < 32; i++) { 321 if (addr & (1U << i)) { 322 enum_lookup(stage, sizeof (stage), pipe_enum, i, 323 "ZIO_STAGE_"); 324 mdb_printf(" %s\n", stage); 325 } 326 } 327 328 return (DCMD_OK); 329 } 330 331 /* ARGSUSED */ 332 static int 333 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 334 { 335 /* 336 * This table can be approximately generated by running: 337 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 338 */ 339 static const char *params[] = { 340 "arc_reduce_dnlc_percent", 341 "zfs_arc_max", 342 "zfs_arc_min", 343 "arc_shrink_shift", 344 "zfs_mdcomp_disable", 345 "zfs_prefetch_disable", 346 "zfetch_max_streams", 347 "zfetch_min_sec_reap", 348 "zfetch_block_cap", 349 "zfetch_array_rd_sz", 350 "zfs_default_bs", 351 "zfs_default_ibs", 352 "metaslab_aliquot", 353 "reference_tracking_enable", 354 "reference_history", 355 "zio_taskq_threads", 356 "spa_max_replication_override", 357 "spa_mode", 358 "zfs_flags", 359 "zfs_txg_synctime", 360 "zfs_txg_timeout", 361 "zfs_write_limit_min", 362 "zfs_write_limit_max", 363 "zfs_write_limit_shift", 364 "zfs_write_limit_override", 365 "zfs_no_write_throttle", 366 "zfs_vdev_cache_max", 367 "zfs_vdev_cache_size", 368 "zfs_vdev_cache_bshift", 369 "vdev_mirror_shift", 370 "zfs_vdev_max_pending", 371 "zfs_vdev_min_pending", 372 "zfs_scrub_limit", 373 "zfs_vdev_time_shift", 374 "zfs_vdev_ramp_rate", 375 "zfs_vdev_aggregation_limit", 376 "fzap_default_block_shift", 377 "zfs_immediate_write_sz", 378 "zfs_read_chunk_size", 379 "zil_disable", 380 "zfs_nocacheflush", 381 "metaslab_gang_bang", 382 "zio_injection_enabled", 383 "zvol_immediate_write_sz", 384 }; 385 int i; 386 387 for (i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 388 int sz; 389 uint64_t val64; 390 uint32_t *val32p = (uint32_t *)&val64; 391 392 sz = mdb_readvar(&val64, params[i]); 393 if (sz == 4) { 394 mdb_printf("%s = 0x%x\n", params[i], *val32p); 395 } else if (sz == 8) { 396 mdb_printf("%s = 0x%llx\n", params[i], val64); 397 } else { 398 mdb_warn("variable %s not found", params[i]); 399 } 400 } 401 402 return (DCMD_OK); 403 } 404 405 /* ARGSUSED */ 406 static int 407 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 408 { 409 blkptr_t bp; 410 dmu_object_type_info_t *doti; 411 zio_compress_info_t *zct; 412 zio_checksum_info_t *zci; 413 int i; 414 char buf[MAXPATHLEN]; 415 416 if (mdb_vread(&bp, sizeof (blkptr_t), addr) == -1) { 417 mdb_warn("failed to read blkptr_t"); 418 return (DCMD_ERR); 419 } 420 421 if (read_symbol("dmu_ot", (void **)&doti) != DCMD_OK) 422 return (DCMD_ERR); 423 for (i = 0; i < DMU_OT_NUMTYPES; i++) { 424 mdb_readstr(buf, sizeof (buf), (uintptr_t)doti[i].ot_name); 425 doti[i].ot_name = local_strdup(buf); 426 } 427 428 if (read_symbol("zio_checksum_table", (void **)&zci) != DCMD_OK) 429 return (DCMD_ERR); 430 for (i = 0; i < ZIO_CHECKSUM_FUNCTIONS; i++) { 431 mdb_readstr(buf, sizeof (buf), (uintptr_t)zci[i].ci_name); 432 zci[i].ci_name = local_strdup(buf); 433 } 434 435 if (read_symbol("zio_compress_table", (void **)&zct) != DCMD_OK) 436 return (DCMD_ERR); 437 for (i = 0; i < ZIO_COMPRESS_FUNCTIONS; i++) { 438 mdb_readstr(buf, sizeof (buf), (uintptr_t)zct[i].ci_name); 439 zct[i].ci_name = local_strdup(buf); 440 } 441 442 /* 443 * Super-ick warning: This code is also duplicated in 444 * cmd/zdb.c . Yeah, I hate code replication, too. 445 */ 446 for (i = 0; i < BP_GET_NDVAS(&bp); i++) { 447 dva_t *dva = &bp.blk_dva[i]; 448 449 mdb_printf("DVA[%d]: vdev_id %lld / %llx\n", i, 450 DVA_GET_VDEV(dva), DVA_GET_OFFSET(dva)); 451 mdb_printf("DVA[%d]: GANG: %-5s GRID: %04x\t" 452 "ASIZE: %llx\n", i, DVA_GET_GANG(dva) ? "TRUE" : "FALSE", 453 DVA_GET_GRID(dva), DVA_GET_ASIZE(dva)); 454 mdb_printf("DVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", i, 455 DVA_GET_VDEV(dva), DVA_GET_OFFSET(dva), BP_GET_PSIZE(&bp), 456 BP_SHOULD_BYTESWAP(&bp) ? "e" : "", 457 !DVA_GET_GANG(dva) && BP_GET_LEVEL(&bp) != 0 ? "i" : "", 458 DVA_GET_GANG(dva) ? "g" : "", 459 BP_GET_COMPRESS(&bp) != 0 ? "d" : ""); 460 } 461 mdb_printf("LSIZE: %-16llx\t\tPSIZE: %llx\n", 462 BP_GET_LSIZE(&bp), BP_GET_PSIZE(&bp)); 463 mdb_printf("ENDIAN: %6s\t\t\t\t\tTYPE: %s\n", 464 BP_GET_BYTEORDER(&bp) ? "LITTLE" : "BIG", 465 doti[BP_GET_TYPE(&bp)].ot_name); 466 mdb_printf("BIRTH: %-16llx LEVEL: %-2d\tFILL: %llx\n", 467 bp.blk_birth, BP_GET_LEVEL(&bp), bp.blk_fill); 468 mdb_printf("CKFUNC: %-16s\t\tCOMP: %s\n", 469 zci[BP_GET_CHECKSUM(&bp)].ci_name, 470 zct[BP_GET_COMPRESS(&bp)].ci_name); 471 mdb_printf("CKSUM: %llx:%llx:%llx:%llx\n", 472 bp.blk_cksum.zc_word[0], 473 bp.blk_cksum.zc_word[1], 474 bp.blk_cksum.zc_word[2], 475 bp.blk_cksum.zc_word[3]); 476 477 return (DCMD_OK); 478 } 479 480 /* ARGSUSED */ 481 static int 482 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 483 { 484 mdb_ctf_id_t id; 485 dmu_buf_t db; 486 uintptr_t objset; 487 uint8_t level; 488 uint64_t blkid; 489 uint64_t holds; 490 char objectname[32]; 491 char blkidname[32]; 492 char path[MAXNAMELEN]; 493 494 if (DCMD_HDRSPEC(flags)) { 495 mdb_printf(" addr object lvl blkid holds os\n"); 496 } 497 498 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &id) == -1) { 499 mdb_warn("couldn't find struct dmu_buf_impl_t"); 500 return (DCMD_ERR); 501 } 502 503 if (GETMEMBID(addr, &id, db_objset, objset) || 504 GETMEMBID(addr, &id, db, db) || 505 GETMEMBID(addr, &id, db_level, level) || 506 GETMEMBID(addr, &id, db_blkid, blkid)) { 507 return (WALK_ERR); 508 } 509 510 if (getrefcount(addr, &id, "db_holds", &holds)) { 511 return (WALK_ERR); 512 } 513 514 if (db.db_object == DMU_META_DNODE_OBJECT) 515 (void) strcpy(objectname, "mdn"); 516 else 517 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 518 (u_longlong_t)db.db_object); 519 520 if (blkid == DB_BONUS_BLKID) 521 (void) strcpy(blkidname, "bonus"); 522 else 523 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 524 (u_longlong_t)blkid); 525 526 if (objset_name(objset, path)) { 527 return (WALK_ERR); 528 } 529 530 mdb_printf("%p %8s %1u %9s %2llu %s\n", 531 addr, objectname, level, blkidname, holds, path); 532 533 return (DCMD_OK); 534 } 535 536 /* ARGSUSED */ 537 static int 538 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 539 { 540 #define HISTOSZ 32 541 uintptr_t dbp; 542 dmu_buf_impl_t db; 543 dbuf_hash_table_t ht; 544 uint64_t bucket, ndbufs; 545 uint64_t histo[HISTOSZ]; 546 uint64_t histo2[HISTOSZ]; 547 int i, maxidx; 548 549 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 550 mdb_warn("failed to read 'dbuf_hash_table'"); 551 return (DCMD_ERR); 552 } 553 554 for (i = 0; i < HISTOSZ; i++) { 555 histo[i] = 0; 556 histo2[i] = 0; 557 } 558 559 ndbufs = 0; 560 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 561 int len; 562 563 if (mdb_vread(&dbp, sizeof (void *), 564 (uintptr_t)(ht.hash_table+bucket)) == -1) { 565 mdb_warn("failed to read hash bucket %u at %p", 566 bucket, ht.hash_table+bucket); 567 return (DCMD_ERR); 568 } 569 570 len = 0; 571 while (dbp != 0) { 572 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 573 dbp) == -1) { 574 mdb_warn("failed to read dbuf at %p", dbp); 575 return (DCMD_ERR); 576 } 577 dbp = (uintptr_t)db.db_hash_next; 578 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 579 histo2[i]++; 580 len++; 581 ndbufs++; 582 } 583 584 if (len >= HISTOSZ) 585 len = HISTOSZ-1; 586 histo[len]++; 587 } 588 589 mdb_printf("hash table has %llu buckets, %llu dbufs " 590 "(avg %llu buckets/dbuf)\n", 591 ht.hash_table_mask+1, ndbufs, 592 (ht.hash_table_mask+1)/ndbufs); 593 594 mdb_printf("\n"); 595 maxidx = 0; 596 for (i = 0; i < HISTOSZ; i++) 597 if (histo[i] > 0) 598 maxidx = i; 599 mdb_printf("hash chain length number of buckets\n"); 600 for (i = 0; i <= maxidx; i++) 601 mdb_printf("%u %llu\n", i, histo[i]); 602 603 mdb_printf("\n"); 604 maxidx = 0; 605 for (i = 0; i < HISTOSZ; i++) 606 if (histo2[i] > 0) 607 maxidx = i; 608 mdb_printf("hash chain depth number of dbufs\n"); 609 for (i = 0; i <= maxidx; i++) 610 mdb_printf("%u or more %llu %llu%%\n", 611 i, histo2[i], histo2[i]*100/ndbufs); 612 613 614 return (DCMD_OK); 615 } 616 617 typedef struct dbufs_data { 618 mdb_ctf_id_t id; 619 uint64_t objset; 620 uint64_t object; 621 uint64_t level; 622 uint64_t blkid; 623 char *osname; 624 } dbufs_data_t; 625 626 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 627 628 /* ARGSUSED */ 629 static int 630 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 631 { 632 dbufs_data_t *data = arg; 633 uintptr_t objset; 634 dmu_buf_t db; 635 uint8_t level; 636 uint64_t blkid; 637 char osname[MAXNAMELEN]; 638 639 if (GETMEMBID(addr, &data->id, db_objset, objset) || 640 GETMEMBID(addr, &data->id, db, db) || 641 GETMEMBID(addr, &data->id, db_level, level) || 642 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 643 return (WALK_ERR); 644 } 645 646 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 647 (data->osname == NULL || (objset_name(objset, osname) == 0 && 648 strcmp(data->osname, osname) == 0)) && 649 (data->object == DBUFS_UNSET || data->object == db.db_object) && 650 (data->level == DBUFS_UNSET || data->level == level) && 651 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 652 mdb_printf("%#lr\n", addr); 653 } 654 return (WALK_NEXT); 655 } 656 657 /* ARGSUSED */ 658 static int 659 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 660 { 661 dbufs_data_t data; 662 char *object = NULL; 663 char *blkid = NULL; 664 665 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 666 data.osname = NULL; 667 668 if (mdb_getopts(argc, argv, 669 'O', MDB_OPT_UINT64, &data.objset, 670 'n', MDB_OPT_STR, &data.osname, 671 'o', MDB_OPT_STR, &object, 672 'l', MDB_OPT_UINT64, &data.level, 673 'b', MDB_OPT_STR, &blkid) != argc) { 674 return (DCMD_USAGE); 675 } 676 677 if (object) { 678 if (strcmp(object, "mdn") == 0) { 679 data.object = DMU_META_DNODE_OBJECT; 680 } else { 681 data.object = mdb_strtoull(object); 682 } 683 } 684 685 if (blkid) { 686 if (strcmp(blkid, "bonus") == 0) { 687 data.blkid = DB_BONUS_BLKID; 688 } else { 689 data.blkid = mdb_strtoull(blkid); 690 } 691 } 692 693 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &data.id) == -1) { 694 mdb_warn("couldn't find struct dmu_buf_impl_t"); 695 return (DCMD_ERR); 696 } 697 698 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 699 mdb_warn("can't walk dbufs"); 700 return (DCMD_ERR); 701 } 702 703 return (DCMD_OK); 704 } 705 706 typedef struct abuf_find_data { 707 dva_t dva; 708 mdb_ctf_id_t id; 709 } abuf_find_data_t; 710 711 /* ARGSUSED */ 712 static int 713 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 714 { 715 abuf_find_data_t *data = arg; 716 dva_t dva; 717 718 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 719 return (WALK_ERR); 720 } 721 722 if (dva.dva_word[0] == data->dva.dva_word[0] && 723 dva.dva_word[1] == data->dva.dva_word[1]) { 724 mdb_printf("%#lr\n", addr); 725 } 726 return (WALK_NEXT); 727 } 728 729 /* ARGSUSED */ 730 static int 731 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 732 { 733 abuf_find_data_t data; 734 GElf_Sym sym; 735 int i; 736 const char *syms[] = { 737 "ARC_mru", 738 "ARC_mru_ghost", 739 "ARC_mfu", 740 "ARC_mfu_ghost", 741 }; 742 743 if (argc != 2) 744 return (DCMD_USAGE); 745 746 for (i = 0; i < 2; i ++) { 747 switch (argv[i].a_type) { 748 case MDB_TYPE_STRING: 749 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 750 break; 751 case MDB_TYPE_IMMEDIATE: 752 data.dva.dva_word[i] = argv[i].a_un.a_val; 753 break; 754 default: 755 return (DCMD_USAGE); 756 } 757 } 758 759 if (mdb_ctf_lookup_by_name("struct arc_buf_hdr", &data.id) == -1) { 760 mdb_warn("couldn't find struct arc_buf_hdr"); 761 return (DCMD_ERR); 762 } 763 764 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 765 if (mdb_lookup_by_name(syms[i], &sym)) { 766 mdb_warn("can't find symbol %s", syms[i]); 767 return (DCMD_ERR); 768 } 769 770 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 771 mdb_warn("can't walk %s", syms[i]); 772 return (DCMD_ERR); 773 } 774 } 775 776 return (DCMD_OK); 777 } 778 779 /*ARGSUSED*/ 780 static int 781 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 782 { 783 kstat_named_t *stats; 784 GElf_Sym sym; 785 int nstats, i; 786 uint_t opt_a = FALSE; 787 uint_t opt_b = FALSE; 788 uint_t shift = 0; 789 const char *suffix; 790 791 static const char *bytestats[] = { 792 "p", "c", "c_min", "c_max", "size", NULL 793 }; 794 795 static const char *extras[] = { 796 "arc_no_grow", "arc_tempreserve", 797 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 798 NULL 799 }; 800 801 if (mdb_lookup_by_name("arc_stats", &sym) == -1) { 802 mdb_warn("failed to find 'arc_stats'"); 803 return (DCMD_ERR); 804 } 805 806 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 807 808 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 809 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 810 return (DCMD_ERR); 811 } 812 813 nstats = sym.st_size / sizeof (kstat_named_t); 814 815 /* NB: -a / opt_a are ignored for backwards compatability */ 816 if (mdb_getopts(argc, argv, 817 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 818 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 819 'k', MDB_OPT_SETBITS, 10, &shift, 820 'm', MDB_OPT_SETBITS, 20, &shift, 821 'g', MDB_OPT_SETBITS, 30, &shift, 822 NULL) != argc) 823 return (DCMD_USAGE); 824 825 if (!opt_b && !shift) 826 shift = 20; 827 828 switch (shift) { 829 case 0: 830 suffix = "B"; 831 break; 832 case 10: 833 suffix = "KB"; 834 break; 835 case 20: 836 suffix = "MB"; 837 break; 838 case 30: 839 suffix = "GB"; 840 break; 841 default: 842 suffix = "XX"; 843 } 844 845 for (i = 0; i < nstats; i++) { 846 int j; 847 boolean_t bytes = B_FALSE; 848 849 for (j = 0; bytestats[j]; j++) { 850 if (strcmp(stats[i].name, bytestats[j]) == 0) { 851 bytes = B_TRUE; 852 break; 853 } 854 } 855 856 if (bytes) { 857 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 858 stats[i].value.ui64 >> shift, suffix); 859 } else { 860 mdb_printf("%-25s = %9llu\n", stats[i].name, 861 stats[i].value.ui64); 862 } 863 } 864 865 for (i = 0; extras[i]; i++) { 866 uint64_t buf; 867 868 if (mdb_lookup_by_name(extras[i], &sym) == -1) { 869 mdb_warn("failed to find '%s'", extras[i]); 870 return (DCMD_ERR); 871 } 872 873 if (sym.st_size != sizeof (uint64_t) && 874 sym.st_size != sizeof (uint32_t)) { 875 mdb_warn("expected scalar for variable '%s'\n", 876 extras[i]); 877 return (DCMD_ERR); 878 } 879 880 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 881 mdb_warn("couldn't read '%s'", extras[i]); 882 return (DCMD_ERR); 883 } 884 885 mdb_printf("%-25s = ", extras[i]); 886 887 /* NB: all the 64-bit extras happen to be byte counts */ 888 if (sym.st_size == sizeof (uint64_t)) 889 mdb_printf("%9llu %s\n", buf >> shift, suffix); 890 891 if (sym.st_size == sizeof (uint32_t)) 892 mdb_printf("%9d\n", *((uint32_t *)&buf)); 893 } 894 return (DCMD_OK); 895 } 896 897 /* 898 * ::spa 899 * 900 * -c Print configuration information as well 901 * -v Print vdev state 902 * -e Print vdev error stats 903 * 904 * Print a summarized spa_t. When given no arguments, prints out a table of all 905 * active pools on the system. 906 */ 907 /* ARGSUSED */ 908 static int 909 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 910 { 911 spa_t spa; 912 char poolname[MAXNAMELEN]; 913 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 914 "SPARE", "UNINIT", "IOFAILURE", "UNAVAIL" }; 915 const char *state; 916 int config = FALSE; 917 int vdevs = FALSE; 918 int errors = FALSE; 919 920 if (mdb_getopts(argc, argv, 921 'c', MDB_OPT_SETBITS, TRUE, &config, 922 'v', MDB_OPT_SETBITS, TRUE, &vdevs, 923 'e', MDB_OPT_SETBITS, TRUE, &errors, 924 NULL) != argc) 925 return (DCMD_USAGE); 926 927 if (!(flags & DCMD_ADDRSPEC)) { 928 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 929 mdb_warn("can't walk spa"); 930 return (DCMD_ERR); 931 } 932 933 return (DCMD_OK); 934 } 935 936 if (flags & DCMD_PIPE_OUT) { 937 mdb_printf("%#lr\n", addr); 938 return (DCMD_OK); 939 } 940 941 if (DCMD_HDRSPEC(flags)) 942 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 943 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 944 945 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 946 mdb_warn("failed to read spa_t at %p", addr); 947 return (DCMD_ERR); 948 } 949 950 if (mdb_readstr(poolname, sizeof (poolname), (uintptr_t)spa.spa_name) 951 == -1) { 952 mdb_warn("failed to read pool name at %p", spa.spa_name); 953 return (DCMD_ERR); 954 } 955 956 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 957 state = "UNKNOWN"; 958 else 959 state = statetab[spa.spa_state]; 960 961 mdb_printf("%0?p %9s %s\n", addr, state, poolname); 962 963 if (config) { 964 mdb_printf("\n"); 965 mdb_inc_indent(4); 966 if (mdb_call_dcmd("spa_config", addr, flags, 0, 967 NULL) != DCMD_OK) 968 return (DCMD_ERR); 969 mdb_dec_indent(4); 970 } 971 972 if (vdevs || errors) { 973 mdb_arg_t v; 974 975 v.a_type = MDB_TYPE_STRING; 976 v.a_un.a_str = "-e"; 977 978 mdb_printf("\n"); 979 mdb_inc_indent(4); 980 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0, 981 &v) != DCMD_OK) 982 return (DCMD_ERR); 983 mdb_dec_indent(4); 984 } 985 986 return (DCMD_OK); 987 } 988 989 /* 990 * ::spa_config 991 * 992 * Given a spa_t, print the configuration information stored in spa_config. 993 * Since it's just an nvlist, format it as an indented list of name=value pairs. 994 * We simply read the value of spa_config and pass off to ::nvlist. 995 */ 996 /* ARGSUSED */ 997 static int 998 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 999 { 1000 spa_t spa; 1001 1002 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1003 return (DCMD_USAGE); 1004 1005 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1006 mdb_warn("failed to read spa_t at %p", addr); 1007 return (DCMD_ERR); 1008 } 1009 1010 if (spa.spa_config == NULL) { 1011 mdb_printf("(none)\n"); 1012 return (DCMD_OK); 1013 } 1014 1015 return (mdb_call_dcmd("nvlist", (uintptr_t)spa.spa_config, flags, 1016 0, NULL)); 1017 } 1018 1019 /* 1020 * ::vdev 1021 * 1022 * Print out a summarized vdev_t, in the following form: 1023 * 1024 * ADDR STATE AUX DESC 1025 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1026 * 1027 * If '-r' is specified, recursively visit all children. 1028 * 1029 * With '-e', the statistics associated with the vdev are printed as well. 1030 */ 1031 static int 1032 do_print_vdev(uintptr_t addr, int flags, int depth, int stats, 1033 int recursive) 1034 { 1035 vdev_t vdev; 1036 char desc[MAXNAMELEN]; 1037 int c, children; 1038 uintptr_t *child; 1039 const char *state, *aux; 1040 1041 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1042 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1043 return (DCMD_ERR); 1044 } 1045 1046 if (flags & DCMD_PIPE_OUT) { 1047 mdb_printf("%#lr", addr); 1048 } else { 1049 if (vdev.vdev_path != NULL) { 1050 if (mdb_readstr(desc, sizeof (desc), 1051 (uintptr_t)vdev.vdev_path) == -1) { 1052 mdb_warn("failed to read vdev_path at %p\n", 1053 vdev.vdev_path); 1054 return (DCMD_ERR); 1055 } 1056 } else if (vdev.vdev_ops != NULL) { 1057 vdev_ops_t ops; 1058 if (mdb_vread(&ops, sizeof (ops), 1059 (uintptr_t)vdev.vdev_ops) == -1) { 1060 mdb_warn("failed to read vdev_ops at %p\n", 1061 vdev.vdev_ops); 1062 return (DCMD_ERR); 1063 } 1064 (void) strcpy(desc, ops.vdev_op_type); 1065 } else { 1066 (void) strcpy(desc, "<unknown>"); 1067 } 1068 1069 if (depth == 0 && DCMD_HDRSPEC(flags)) 1070 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1071 "ADDR", "STATE", "AUX", 1072 sizeof (uintptr_t) == 4 ? 43 : 35, 1073 "DESCRIPTION"); 1074 1075 mdb_printf("%0?p ", addr); 1076 1077 switch (vdev.vdev_state) { 1078 case VDEV_STATE_CLOSED: 1079 state = "CLOSED"; 1080 break; 1081 case VDEV_STATE_OFFLINE: 1082 state = "OFFLINE"; 1083 break; 1084 case VDEV_STATE_CANT_OPEN: 1085 state = "CANT_OPEN"; 1086 break; 1087 case VDEV_STATE_DEGRADED: 1088 state = "DEGRADED"; 1089 break; 1090 case VDEV_STATE_HEALTHY: 1091 state = "HEALTHY"; 1092 break; 1093 case VDEV_STATE_REMOVED: 1094 state = "REMOVED"; 1095 break; 1096 case VDEV_STATE_FAULTED: 1097 state = "FAULTED"; 1098 break; 1099 default: 1100 state = "UNKNOWN"; 1101 break; 1102 } 1103 1104 switch (vdev.vdev_stat.vs_aux) { 1105 case VDEV_AUX_NONE: 1106 aux = "-"; 1107 break; 1108 case VDEV_AUX_OPEN_FAILED: 1109 aux = "OPEN_FAILED"; 1110 break; 1111 case VDEV_AUX_CORRUPT_DATA: 1112 aux = "CORRUPT_DATA"; 1113 break; 1114 case VDEV_AUX_NO_REPLICAS: 1115 aux = "NO_REPLICAS"; 1116 break; 1117 case VDEV_AUX_BAD_GUID_SUM: 1118 aux = "BAD_GUID_SUM"; 1119 break; 1120 case VDEV_AUX_TOO_SMALL: 1121 aux = "TOO_SMALL"; 1122 break; 1123 case VDEV_AUX_BAD_LABEL: 1124 aux = "BAD_LABEL"; 1125 break; 1126 case VDEV_AUX_VERSION_NEWER: 1127 aux = "VERS_NEWER"; 1128 break; 1129 case VDEV_AUX_VERSION_OLDER: 1130 aux = "VERS_OLDER"; 1131 break; 1132 case VDEV_AUX_SPARED: 1133 aux = "SPARED"; 1134 break; 1135 case VDEV_AUX_ERR_EXCEEDED: 1136 aux = "ERR_EXCEEDED"; 1137 break; 1138 case VDEV_AUX_IO_FAILURE: 1139 aux = "IO_FAILURE"; 1140 break; 1141 case VDEV_AUX_BAD_LOG: 1142 aux = "BAD_LOG"; 1143 break; 1144 default: 1145 aux = "UNKNOWN"; 1146 break; 1147 } 1148 1149 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1150 1151 if (stats) { 1152 vdev_stat_t *vs = &vdev.vdev_stat; 1153 int i; 1154 1155 mdb_inc_indent(4); 1156 mdb_printf("\n"); 1157 mdb_printf("%<u> %12s %12s %12s %12s " 1158 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1159 "IOCTL"); 1160 mdb_printf("OPS "); 1161 for (i = 1; i < ZIO_TYPES; i++) 1162 mdb_printf("%11#llx%s", vs->vs_ops[i], 1163 i == ZIO_TYPES - 1 ? "" : " "); 1164 mdb_printf("\n"); 1165 mdb_printf("BYTES "); 1166 for (i = 1; i < ZIO_TYPES; i++) 1167 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1168 i == ZIO_TYPES - 1 ? "" : " "); 1169 1170 1171 mdb_printf("\n"); 1172 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1173 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1174 mdb_printf("ECKSUM %10#llx\n", 1175 vs->vs_checksum_errors); 1176 mdb_dec_indent(4); 1177 } 1178 1179 if (stats) 1180 mdb_printf("\n"); 1181 } 1182 1183 children = vdev.vdev_children; 1184 1185 if (children == 0 || !recursive) 1186 return (DCMD_OK); 1187 1188 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1189 if (mdb_vread(child, children * sizeof (void *), 1190 (uintptr_t)vdev.vdev_child) == -1) { 1191 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1192 return (DCMD_ERR); 1193 } 1194 1195 for (c = 0; c < children; c++) { 1196 if (do_print_vdev(child[c], flags, depth + 2, stats, 1197 recursive)) 1198 return (DCMD_ERR); 1199 } 1200 1201 return (DCMD_OK); 1202 } 1203 1204 static int 1205 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1206 { 1207 int recursive = FALSE; 1208 int stats = FALSE; 1209 uint64_t depth = 0; 1210 1211 if (mdb_getopts(argc, argv, 1212 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1213 'e', MDB_OPT_SETBITS, TRUE, &stats, 1214 'd', MDB_OPT_UINT64, &depth, 1215 NULL) != argc) 1216 return (DCMD_USAGE); 1217 1218 if (!(flags & DCMD_ADDRSPEC)) { 1219 mdb_warn("no vdev_t address given\n"); 1220 return (DCMD_ERR); 1221 } 1222 1223 return (do_print_vdev(addr, flags, (int)depth, stats, recursive)); 1224 } 1225 1226 typedef struct metaslab_walk_data { 1227 uint64_t mw_numvdevs; 1228 uintptr_t *mw_vdevs; 1229 int mw_curvdev; 1230 uint64_t mw_nummss; 1231 uintptr_t *mw_mss; 1232 int mw_curms; 1233 } metaslab_walk_data_t; 1234 1235 static int 1236 metaslab_walk_step(mdb_walk_state_t *wsp) 1237 { 1238 metaslab_walk_data_t *mw = wsp->walk_data; 1239 metaslab_t ms; 1240 uintptr_t msp; 1241 1242 if (mw->mw_curvdev >= mw->mw_numvdevs) 1243 return (WALK_DONE); 1244 1245 if (mw->mw_mss == NULL) { 1246 uintptr_t mssp; 1247 uintptr_t vdevp; 1248 1249 ASSERT(mw->mw_curms == 0); 1250 ASSERT(mw->mw_nummss == 0); 1251 1252 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1253 if (GETMEMB(vdevp, struct vdev, vdev_ms, mssp) || 1254 GETMEMB(vdevp, struct vdev, vdev_ms_count, mw->mw_nummss)) { 1255 return (WALK_ERR); 1256 } 1257 1258 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1259 UM_SLEEP | UM_GC); 1260 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1261 mssp) == -1) { 1262 mdb_warn("failed to read vdev_ms at %p", mssp); 1263 return (WALK_ERR); 1264 } 1265 } 1266 1267 if (mw->mw_curms >= mw->mw_nummss) { 1268 mw->mw_mss = NULL; 1269 mw->mw_curms = 0; 1270 mw->mw_nummss = 0; 1271 mw->mw_curvdev++; 1272 return (WALK_NEXT); 1273 } 1274 1275 msp = mw->mw_mss[mw->mw_curms]; 1276 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1277 mdb_warn("failed to read metaslab_t at %p", msp); 1278 return (WALK_ERR); 1279 } 1280 1281 mw->mw_curms++; 1282 1283 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1284 } 1285 1286 /* ARGSUSED */ 1287 static int 1288 metaslab_walk_init(mdb_walk_state_t *wsp) 1289 { 1290 metaslab_walk_data_t *mw; 1291 uintptr_t root_vdevp; 1292 uintptr_t childp; 1293 1294 if (wsp->walk_addr == NULL) { 1295 mdb_warn("must supply address of spa_t\n"); 1296 return (WALK_ERR); 1297 } 1298 1299 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1300 1301 if (GETMEMB(wsp->walk_addr, struct spa, spa_root_vdev, root_vdevp) || 1302 GETMEMB(root_vdevp, struct vdev, vdev_children, mw->mw_numvdevs) || 1303 GETMEMB(root_vdevp, struct vdev, vdev_child, childp)) { 1304 return (DCMD_ERR); 1305 } 1306 1307 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1308 UM_SLEEP | UM_GC); 1309 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1310 childp) == -1) { 1311 mdb_warn("failed to read root vdev children at %p", childp); 1312 return (DCMD_ERR); 1313 } 1314 1315 wsp->walk_data = mw; 1316 1317 return (WALK_NEXT); 1318 } 1319 1320 typedef struct mdb_spa { 1321 uintptr_t spa_dsl_pool; 1322 uintptr_t spa_root_vdev; 1323 } mdb_spa_t; 1324 1325 typedef struct mdb_dsl_dir { 1326 uintptr_t dd_phys; 1327 uint64_t dd_used_bytes; 1328 int64_t dd_space_towrite[TXG_SIZE]; 1329 } mdb_dsl_dir_t; 1330 1331 typedef struct mdb_dsl_dir_phys { 1332 uint64_t dd_used_bytes; 1333 uint64_t dd_compressed_bytes; 1334 uint64_t dd_uncompressed_bytes; 1335 } mdb_dsl_dir_phys_t; 1336 1337 typedef struct mdb_vdev { 1338 uintptr_t vdev_parent; 1339 uintptr_t vdev_ms; 1340 uint64_t vdev_ms_count; 1341 vdev_stat_t vdev_stat; 1342 } mdb_vdev_t; 1343 1344 typedef struct mdb_metaslab { 1345 space_map_t ms_allocmap[TXG_SIZE]; 1346 space_map_t ms_freemap[TXG_SIZE]; 1347 space_map_t ms_map; 1348 space_map_obj_t ms_smo; 1349 space_map_obj_t ms_smo_syncing; 1350 } mdb_metaslab_t; 1351 1352 typedef struct space_data { 1353 uint64_t ms_allocmap[TXG_SIZE]; 1354 uint64_t ms_freemap[TXG_SIZE]; 1355 uint64_t ms_map; 1356 uint64_t avail; 1357 uint64_t nowavail; 1358 } space_data_t; 1359 1360 /* ARGSUSED */ 1361 static int 1362 space_cb(uintptr_t addr, const void *unknown, void *arg) 1363 { 1364 space_data_t *sd = arg; 1365 mdb_metaslab_t ms; 1366 1367 if (GETMEMB(addr, struct metaslab, ms_allocmap, ms.ms_allocmap) || 1368 GETMEMB(addr, struct metaslab, ms_freemap, ms.ms_freemap) || 1369 GETMEMB(addr, struct metaslab, ms_map, ms.ms_map) || 1370 GETMEMB(addr, struct metaslab, ms_smo, ms.ms_smo) || 1371 GETMEMB(addr, struct metaslab, ms_smo_syncing, ms.ms_smo_syncing)) { 1372 return (WALK_ERR); 1373 } 1374 1375 sd->ms_allocmap[0] += ms.ms_allocmap[0].sm_space; 1376 sd->ms_allocmap[1] += ms.ms_allocmap[1].sm_space; 1377 sd->ms_allocmap[2] += ms.ms_allocmap[2].sm_space; 1378 sd->ms_allocmap[3] += ms.ms_allocmap[3].sm_space; 1379 sd->ms_freemap[0] += ms.ms_freemap[0].sm_space; 1380 sd->ms_freemap[1] += ms.ms_freemap[1].sm_space; 1381 sd->ms_freemap[2] += ms.ms_freemap[2].sm_space; 1382 sd->ms_freemap[3] += ms.ms_freemap[3].sm_space; 1383 sd->ms_map += ms.ms_map.sm_space; 1384 sd->avail += ms.ms_map.sm_size - ms.ms_smo.smo_alloc; 1385 sd->nowavail += ms.ms_map.sm_size - ms.ms_smo_syncing.smo_alloc; 1386 1387 return (WALK_NEXT); 1388 } 1389 1390 /* 1391 * ::spa_space [-b] 1392 * 1393 * Given a spa_t, print out it's on-disk space usage and in-core 1394 * estimates of future usage. If -b is given, print space in bytes. 1395 * Otherwise print in megabytes. 1396 */ 1397 /* ARGSUSED */ 1398 static int 1399 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1400 { 1401 mdb_spa_t spa; 1402 uintptr_t dp_root_dir; 1403 mdb_dsl_dir_t dd; 1404 mdb_dsl_dir_phys_t dsp; 1405 uint64_t children; 1406 uintptr_t childaddr; 1407 space_data_t sd; 1408 int shift = 20; 1409 char *suffix = "M"; 1410 int bits = FALSE; 1411 1412 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bits, NULL) != 1413 argc) 1414 return (DCMD_USAGE); 1415 if (!(flags & DCMD_ADDRSPEC)) 1416 return (DCMD_USAGE); 1417 1418 if (bits) { 1419 shift = 0; 1420 suffix = ""; 1421 } 1422 1423 if (GETMEMB(addr, struct spa, spa_dsl_pool, spa.spa_dsl_pool) || 1424 GETMEMB(addr, struct spa, spa_root_vdev, spa.spa_root_vdev) || 1425 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_children, children) || 1426 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_child, childaddr) || 1427 GETMEMB(spa.spa_dsl_pool, struct dsl_pool, 1428 dp_root_dir, dp_root_dir) || 1429 GETMEMB(dp_root_dir, struct dsl_dir, dd_phys, dd.dd_phys) || 1430 GETMEMB(dp_root_dir, struct dsl_dir, 1431 dd_used_bytes, dd.dd_used_bytes) || 1432 GETMEMB(dp_root_dir, struct dsl_dir, 1433 dd_space_towrite, dd.dd_space_towrite) || 1434 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1435 dd_used_bytes, dsp.dd_used_bytes) || 1436 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1437 dd_compressed_bytes, dsp.dd_compressed_bytes) || 1438 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1439 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) { 1440 return (DCMD_ERR); 1441 } 1442 1443 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1444 dd.dd_space_towrite[0] >> shift, suffix, 1445 dd.dd_space_towrite[1] >> shift, suffix, 1446 dd.dd_space_towrite[2] >> shift, suffix, 1447 dd.dd_space_towrite[3] >> shift, suffix); 1448 mdb_printf("dd_used_bytes = %llu%s\n", 1449 dd.dd_used_bytes >> shift, suffix); 1450 1451 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1452 dsp.dd_used_bytes >> shift, suffix); 1453 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1454 dsp.dd_compressed_bytes >> shift, suffix); 1455 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1456 dsp.dd_uncompressed_bytes >> shift, suffix); 1457 1458 bzero(&sd, sizeof (sd)); 1459 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1460 mdb_warn("can't walk metaslabs"); 1461 return (DCMD_ERR); 1462 } 1463 1464 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1465 sd.ms_allocmap[0] >> shift, suffix, 1466 sd.ms_allocmap[1] >> shift, suffix, 1467 sd.ms_allocmap[2] >> shift, suffix, 1468 sd.ms_allocmap[3] >> shift, suffix); 1469 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1470 sd.ms_freemap[0] >> shift, suffix, 1471 sd.ms_freemap[1] >> shift, suffix, 1472 sd.ms_freemap[2] >> shift, suffix, 1473 sd.ms_freemap[3] >> shift, suffix); 1474 mdb_printf("ms_map = %llu%s\n", sd.ms_map >> shift, suffix); 1475 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1476 mdb_printf("current syncing avail = %llu%s\n", 1477 sd.nowavail >> shift, suffix); 1478 1479 return (DCMD_OK); 1480 } 1481 1482 /* 1483 * ::spa_verify 1484 * 1485 * Given a spa_t, verify that that the pool is self-consistent. 1486 * Currently, it only checks to make sure that the vdev tree exists. 1487 */ 1488 /* ARGSUSED */ 1489 static int 1490 spa_verify(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1491 { 1492 spa_t spa; 1493 1494 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1495 return (DCMD_USAGE); 1496 1497 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1498 mdb_warn("failed to read spa_t at %p", addr); 1499 return (DCMD_ERR); 1500 } 1501 1502 if (spa.spa_root_vdev == NULL) { 1503 mdb_printf("no vdev tree present\n"); 1504 return (DCMD_OK); 1505 } 1506 1507 return (DCMD_OK); 1508 } 1509 1510 /* 1511 * ::spa_vdevs 1512 * 1513 * -e Include error stats 1514 * 1515 * Print out a summarized list of vdevs for the given spa_t. 1516 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 1517 * iterating over the cache devices. 1518 */ 1519 /* ARGSUSED */ 1520 static int 1521 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1522 { 1523 spa_t spa; 1524 mdb_arg_t v[3]; 1525 int errors = FALSE; 1526 int ret, i; 1527 uintptr_t *aux; 1528 size_t len; 1529 1530 if (mdb_getopts(argc, argv, 1531 'e', MDB_OPT_SETBITS, TRUE, &errors, 1532 NULL) != argc) 1533 return (DCMD_USAGE); 1534 1535 if (!(flags & DCMD_ADDRSPEC)) 1536 return (DCMD_USAGE); 1537 1538 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1539 mdb_warn("failed to read spa_t at %p", addr); 1540 return (DCMD_ERR); 1541 } 1542 1543 /* 1544 * Unitialized spa_t structures can have a NULL root vdev. 1545 */ 1546 if (spa.spa_root_vdev == NULL) { 1547 mdb_printf("no associated vdevs\n"); 1548 return (DCMD_OK); 1549 } 1550 1551 v[0].a_type = MDB_TYPE_STRING; 1552 v[0].a_un.a_str = errors ? "-re" : "-r"; 1553 1554 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1555 flags, 1, v); 1556 if (ret != DCMD_OK) 1557 return (ret); 1558 1559 /* 1560 * Iterate over cache devices and print those out as well. This is a 1561 * little annoying because we don't have a root vdev to pass to ::vdev. 1562 * Instead, we print a single 'cache' line and then call it for each 1563 * child vdev. 1564 */ 1565 if (spa.spa_l2cache.sav_count != 0) { 1566 v[1].a_type = MDB_TYPE_STRING; 1567 v[1].a_un.a_str = "-d"; 1568 v[2].a_type = MDB_TYPE_IMMEDIATE; 1569 v[2].a_un.a_val = 2; 1570 1571 len = spa.spa_l2cache.sav_count * sizeof (uintptr_t); 1572 aux = mdb_alloc(len, UM_SLEEP); 1573 if (mdb_vread(aux, len, 1574 (uintptr_t)spa.spa_l2cache.sav_vdevs) == -1) { 1575 mdb_free(aux, len); 1576 mdb_warn("failed to read l2cache vdevs at %p", 1577 spa.spa_l2cache.sav_vdevs); 1578 return (DCMD_ERR); 1579 } 1580 1581 mdb_printf("%-?s %-9s %-12s cache\n", "-", "-", "-"); 1582 1583 for (i = 0; i < spa.spa_l2cache.sav_count; i++) { 1584 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 1585 if (ret != DCMD_OK) { 1586 mdb_free(aux, len); 1587 return (ret); 1588 } 1589 } 1590 1591 mdb_free(aux, len); 1592 } 1593 1594 return (DCMD_OK); 1595 } 1596 1597 /* 1598 * ::zio 1599 * 1600 * Print a summary of zio_t and all its children. This is intended to display a 1601 * zio tree, and hence we only pick the most important pieces of information for 1602 * the main summary. More detailed information can always be found by doing a 1603 * '::print zio' on the underlying zio_t. The columns we display are: 1604 * 1605 * ADDRESS TYPE STAGE WAITER 1606 * 1607 * The 'address' column is indented by one space for each depth level as we 1608 * descend down the tree. 1609 */ 1610 1611 #define ZIO_MAXDEPTH 16 1612 1613 static int 1614 zio_print_cb(uintptr_t addr, const void *data, void *priv) 1615 { 1616 const zio_t *zio = data; 1617 uintptr_t depth = (uintptr_t)priv; 1618 mdb_ctf_id_t type_enum, stage_enum; 1619 const char *type, *stage; 1620 int maxdepth; 1621 1622 maxdepth = sizeof (uintptr_t) * 2 + ZIO_MAXDEPTH; 1623 if (depth > ZIO_MAXDEPTH) 1624 depth = ZIO_MAXDEPTH; 1625 1626 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 1627 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 1628 mdb_warn("failed to lookup zio enums"); 1629 return (WALK_ERR); 1630 } 1631 1632 if ((type = mdb_ctf_enum_name(type_enum, zio->io_type)) != NULL) 1633 type += sizeof ("ZIO_TYPE_") - 1; 1634 else 1635 type = "?"; 1636 1637 if ((stage = mdb_ctf_enum_name(stage_enum, zio->io_stage)) != NULL) 1638 stage += sizeof ("ZIO_STAGE_") - 1; 1639 else 1640 stage = "?"; 1641 1642 1643 mdb_printf("%*s%-*p %-5s %-22s ", 1644 depth, "", maxdepth - depth, addr, type, stage); 1645 if (zio->io_waiter) 1646 mdb_printf("%?p\n", zio->io_waiter); 1647 else 1648 mdb_printf("-\n"); 1649 1650 if (mdb_pwalk("zio_child", zio_print_cb, (void *)(depth + 1), 1651 addr) != 0) { 1652 mdb_warn("failed to walk zio_t children at %p\n", addr); 1653 return (WALK_ERR); 1654 } 1655 1656 return (WALK_NEXT); 1657 } 1658 1659 /*ARGSUSED*/ 1660 static int 1661 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1662 { 1663 zio_t zio; 1664 int maxdepth; 1665 1666 maxdepth = sizeof (uintptr_t) * 2 + ZIO_MAXDEPTH; 1667 1668 if (!(flags & DCMD_ADDRSPEC)) 1669 return (DCMD_USAGE); 1670 1671 if (mdb_vread(&zio, sizeof (zio_t), addr) == -1) { 1672 mdb_warn("failed to read zio_t at %p", addr); 1673 return (DCMD_ERR); 1674 } 1675 1676 if (DCMD_HDRSPEC(flags)) 1677 mdb_printf("%<u>%-*s %-5s %-22s %-?s%</u>\n", maxdepth, 1678 "ADDRESS", "TYPE", "STAGE", "WAITER"); 1679 1680 if (zio_print_cb(addr, &zio, NULL) != WALK_NEXT) 1681 return (DCMD_ERR); 1682 1683 return (DCMD_OK); 1684 } 1685 1686 /* 1687 * [addr]::zio_state 1688 * 1689 * Print a summary of all zio_t structures on the system, or for a particular 1690 * pool. This is equivalent to '::walk zio_root | ::zio'. 1691 */ 1692 /*ARGSUSED*/ 1693 static int 1694 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1695 { 1696 /* 1697 * MDB will remember the last address of the pipeline, so if we don't 1698 * zero this we'll end up trying to walk zio structures for a 1699 * non-existent spa_t. 1700 */ 1701 if (!(flags & DCMD_ADDRSPEC)) 1702 addr = 0; 1703 1704 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 1705 } 1706 1707 typedef struct txg_list_walk_data { 1708 uintptr_t lw_head[TXG_SIZE]; 1709 int lw_txgoff; 1710 int lw_maxoff; 1711 size_t lw_offset; 1712 void *lw_obj; 1713 } txg_list_walk_data_t; 1714 1715 static int 1716 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 1717 { 1718 txg_list_walk_data_t *lwd; 1719 txg_list_t list; 1720 int i; 1721 1722 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 1723 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 1724 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 1725 return (WALK_ERR); 1726 } 1727 1728 for (i = 0; i < TXG_SIZE; i++) 1729 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 1730 lwd->lw_offset = list.tl_offset; 1731 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 1732 UM_SLEEP | UM_GC); 1733 lwd->lw_txgoff = txg; 1734 lwd->lw_maxoff = maxoff; 1735 1736 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1737 wsp->walk_data = lwd; 1738 1739 return (WALK_NEXT); 1740 } 1741 1742 static int 1743 txg_list_walk_init(mdb_walk_state_t *wsp) 1744 { 1745 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 1746 } 1747 1748 static int 1749 txg_list0_walk_init(mdb_walk_state_t *wsp) 1750 { 1751 return (txg_list_walk_init_common(wsp, 0, 0)); 1752 } 1753 1754 static int 1755 txg_list1_walk_init(mdb_walk_state_t *wsp) 1756 { 1757 return (txg_list_walk_init_common(wsp, 1, 1)); 1758 } 1759 1760 static int 1761 txg_list2_walk_init(mdb_walk_state_t *wsp) 1762 { 1763 return (txg_list_walk_init_common(wsp, 2, 2)); 1764 } 1765 1766 static int 1767 txg_list3_walk_init(mdb_walk_state_t *wsp) 1768 { 1769 return (txg_list_walk_init_common(wsp, 3, 3)); 1770 } 1771 1772 static int 1773 txg_list_walk_step(mdb_walk_state_t *wsp) 1774 { 1775 txg_list_walk_data_t *lwd = wsp->walk_data; 1776 uintptr_t addr; 1777 txg_node_t *node; 1778 int status; 1779 1780 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 1781 lwd->lw_txgoff++; 1782 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1783 } 1784 1785 if (wsp->walk_addr == NULL) 1786 return (WALK_DONE); 1787 1788 addr = wsp->walk_addr - lwd->lw_offset; 1789 1790 if (mdb_vread(lwd->lw_obj, 1791 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 1792 mdb_warn("failed to read list element at %#lx", addr); 1793 return (WALK_ERR); 1794 } 1795 1796 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 1797 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 1798 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 1799 1800 return (status); 1801 } 1802 1803 /* 1804 * ::walk spa 1805 * 1806 * Walk all named spa_t structures in the namespace. This is nothing more than 1807 * a layered avl walk. 1808 */ 1809 static int 1810 spa_walk_init(mdb_walk_state_t *wsp) 1811 { 1812 GElf_Sym sym; 1813 1814 if (wsp->walk_addr != NULL) { 1815 mdb_warn("spa walk only supports global walks\n"); 1816 return (WALK_ERR); 1817 } 1818 1819 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 1820 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 1821 return (WALK_ERR); 1822 } 1823 1824 wsp->walk_addr = (uintptr_t)sym.st_value; 1825 1826 if (mdb_layered_walk("avl", wsp) == -1) { 1827 mdb_warn("failed to walk 'avl'\n"); 1828 return (WALK_ERR); 1829 } 1830 1831 return (WALK_NEXT); 1832 } 1833 1834 static int 1835 spa_walk_step(mdb_walk_state_t *wsp) 1836 { 1837 spa_t spa; 1838 1839 if (mdb_vread(&spa, sizeof (spa), wsp->walk_addr) == -1) { 1840 mdb_warn("failed to read spa_t at %p", wsp->walk_addr); 1841 return (WALK_ERR); 1842 } 1843 1844 return (wsp->walk_callback(wsp->walk_addr, &spa, wsp->walk_cbdata)); 1845 } 1846 1847 /* 1848 * [addr]::walk zio 1849 * 1850 * Walk all active zio_t structures on the system. This is simply a layered 1851 * walk on top of ::walk zio_cache, with the optional ability to limit the 1852 * structures to a particular pool. 1853 */ 1854 static int 1855 zio_walk_init(mdb_walk_state_t *wsp) 1856 { 1857 wsp->walk_data = (void *)wsp->walk_addr; 1858 1859 if (mdb_layered_walk("zio_cache", wsp) == -1) { 1860 mdb_warn("failed to walk 'zio_cache'\n"); 1861 return (WALK_ERR); 1862 } 1863 1864 return (WALK_NEXT); 1865 } 1866 1867 static int 1868 zio_walk_step(mdb_walk_state_t *wsp) 1869 { 1870 zio_t zio; 1871 1872 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1873 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1874 return (WALK_ERR); 1875 } 1876 1877 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 1878 return (WALK_NEXT); 1879 1880 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 1881 } 1882 1883 /* 1884 * ::walk zio_child 1885 * 1886 * Walk the children of a zio_t structure. 1887 */ 1888 static int 1889 zio_child_walk_init(mdb_walk_state_t *wsp) 1890 { 1891 zio_t zio; 1892 1893 if (wsp->walk_addr == 0) { 1894 mdb_warn("::walk zio_child doesn't support global walks\n"); 1895 return (WALK_ERR); 1896 } 1897 1898 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1899 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1900 return (WALK_ERR); 1901 } 1902 1903 wsp->walk_addr = (uintptr_t)zio.io_child; 1904 return (WALK_NEXT); 1905 } 1906 1907 static int 1908 zio_sibling_walk_step(mdb_walk_state_t *wsp) 1909 { 1910 zio_t zio; 1911 int status; 1912 1913 if (wsp->walk_addr == NULL) 1914 return (WALK_DONE); 1915 1916 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1917 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1918 return (WALK_ERR); 1919 } 1920 1921 status = wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata); 1922 1923 wsp->walk_addr = (uintptr_t)zio.io_sibling_next; 1924 return (status); 1925 } 1926 1927 /* 1928 * [addr]::walk zio_root 1929 * 1930 * Walk only root zio_t structures, optionally for a particular spa_t. 1931 */ 1932 static int 1933 zio_walk_root_step(mdb_walk_state_t *wsp) 1934 { 1935 zio_t zio; 1936 1937 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1938 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1939 return (WALK_ERR); 1940 } 1941 1942 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 1943 return (WALK_NEXT); 1944 1945 if ((uintptr_t)zio.io_root != wsp->walk_addr) 1946 return (WALK_NEXT); 1947 1948 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 1949 } 1950 1951 /* 1952 * MDB module linkage information: 1953 * 1954 * We declare a list of structures describing our dcmds, and a function 1955 * named _mdb_init to return a pointer to our module information. 1956 */ 1957 1958 static const mdb_dcmd_t dcmds[] = { 1959 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 1960 { "blkptr", ":", "print blkptr_t", blkptr }, 1961 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 1962 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 1963 { "dbufs", 1964 "\t[-O objset_impl_t*] [-n objset_name | \"mos\"] " 1965 "[-o object | \"mdn\"] \n" 1966 "\t[-l level] [-b blkid | \"bonus\"]", 1967 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 1968 { "abuf_find", "dva_word[0] dva_word[1]", 1969 "find arc_buf_hdr_t of a specified DVA", 1970 abuf_find }, 1971 { "spa", "?[-cv]", "spa_t summary", spa_print }, 1972 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 1973 { "spa_verify", ":", "verify spa_t consistency", spa_verify }, 1974 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 1975 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs }, 1976 { "vdev", ":[-re]\n" 1977 "\t-r display recursively\n" 1978 "\t-e print statistics\n", 1979 "vdev_t summary", vdev_print }, 1980 { "zio", ":", "zio_t summary", zio_print }, 1981 { "zio_state", "?", "print out all zio_t structures on system or " 1982 "for a particular pool", zio_state }, 1983 { "zio_pipeline", ":", "decode a zio pipeline", zio_pipeline }, 1984 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 1985 { NULL } 1986 }; 1987 1988 static const mdb_walker_t walkers[] = { 1989 /* 1990 * In userland, there is no generic provider of list_t walkers, so we 1991 * need to add it. 1992 */ 1993 #ifndef _KERNEL 1994 { LIST_WALK_NAME, LIST_WALK_DESC, 1995 list_walk_init, list_walk_step, list_walk_fini }, 1996 #endif 1997 { "zms_freelist", "walk ZFS metaslab freelist", 1998 freelist_walk_init, freelist_walk_step, NULL }, 1999 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 2000 txg_list_walk_init, txg_list_walk_step, NULL }, 2001 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 2002 txg_list0_walk_init, txg_list_walk_step, NULL }, 2003 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 2004 txg_list1_walk_init, txg_list_walk_step, NULL }, 2005 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 2006 txg_list2_walk_init, txg_list_walk_step, NULL }, 2007 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 2008 txg_list3_walk_init, txg_list_walk_step, NULL }, 2009 { "zio", "walk all zio structures, optionally for a particular spa_t", 2010 zio_walk_init, zio_walk_step, NULL }, 2011 { "zio_child", "walk children of a zio_t structure", 2012 zio_child_walk_init, zio_sibling_walk_step, NULL }, 2013 { "zio_root", "walk all root zio_t structures, optionally for a " 2014 "particular spa_t", 2015 zio_walk_init, zio_walk_root_step, NULL }, 2016 { "spa", "walk all spa_t entries in the namespace", 2017 spa_walk_init, spa_walk_step, NULL }, 2018 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 2019 metaslab_walk_init, metaslab_walk_step, NULL }, 2020 { NULL } 2021 }; 2022 2023 static const mdb_modinfo_t modinfo = { 2024 MDB_API_VERSION, dcmds, walkers 2025 }; 2026 2027 const mdb_modinfo_t * 2028 _mdb_init(void) 2029 { 2030 return (&modinfo); 2031 } 2032