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