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 void 774 abuf_help(void) 775 { 776 mdb_printf("::abuf_find dva_word[0] dva_word[1]\n"); 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, j; 786 uint_t opt_a = FALSE; 787 788 /* 789 * In its default mode, ::arc prints exactly what one would see with 790 * the legacy "arc::print". The legacy[] array tracks the order of 791 * the legacy "arc" structure -- and whether the variable can be found 792 * in a global variable or within the arc_stats (the default). 793 */ 794 struct { 795 const char *name; 796 const char *var; 797 } legacy[] = { 798 { "anon", "arc_anon" }, 799 { "mru", "arc_mru" }, 800 { "mru_ghost", "arc_mru_ghost" }, 801 { "mfu", "arc_mfu" }, 802 { "mfu_ghost", "arc_mfu_ghost" }, 803 { "size" }, 804 { "p" }, 805 { "c" }, 806 { "c_min" }, 807 { "c_max" }, 808 { "hits" }, 809 { "misses" }, 810 { "deleted" }, 811 { "recycle_miss" }, 812 { "mutex_miss" }, 813 { "evict_skip" }, 814 { "hash_elements" }, 815 { "hash_elements_max" }, 816 { "hash_collisions" }, 817 { "hash_chains" }, 818 { "hash_chain_max" }, 819 { "no_grow", "arc_no_grow" }, 820 { NULL } 821 }; 822 823 if (mdb_lookup_by_name("arc_stats", &sym) == -1) { 824 mdb_warn("failed to find 'arc_stats'"); 825 return (DCMD_ERR); 826 } 827 828 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 829 830 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 831 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 832 return (DCMD_ERR); 833 } 834 835 nstats = sym.st_size / sizeof (kstat_named_t); 836 837 if (mdb_getopts(argc, argv, 'a', 838 MDB_OPT_SETBITS, TRUE, &opt_a, NULL) != argc) 839 return (DCMD_USAGE); 840 841 mdb_printf("{\n"); 842 843 if (opt_a) { 844 for (i = 0; i < nstats; i++) { 845 mdb_printf(" %s = 0x%llx\n", stats[i].name, 846 stats[i].value.ui64); 847 } 848 849 mdb_printf("}\n"); 850 return (DCMD_OK); 851 } 852 853 for (i = 0; legacy[i].name != NULL; i++) { 854 if (legacy[i].var != NULL) { 855 uint64_t buf; 856 857 if (mdb_lookup_by_name(legacy[i].var, &sym) == -1) { 858 mdb_warn("failed to find '%s'", legacy[i].var); 859 return (DCMD_ERR); 860 } 861 862 if (sym.st_size != sizeof (uint64_t) && 863 sym.st_size != sizeof (uint32_t)) { 864 mdb_warn("expected scalar for legacy " 865 "variable '%s'\n", legacy[i].var); 866 return (DCMD_ERR); 867 } 868 869 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 870 mdb_warn("couldn't read '%s'", legacy[i].var); 871 return (DCMD_ERR); 872 } 873 874 mdb_printf(" %s = ", legacy[i].name); 875 876 if (sym.st_size == sizeof (uint64_t)) 877 mdb_printf("%a\n", buf); 878 879 if (sym.st_size == sizeof (uint32_t)) 880 mdb_printf("%d\n", *((uint32_t *)&buf)); 881 882 continue; 883 } 884 885 for (j = 0; j < nstats; j++) { 886 if (strcmp(legacy[i].name, stats[j].name) != 0) 887 continue; 888 889 mdb_printf(" %s = ", stats[j].name); 890 891 if (stats[j].value.ui64 == 0) { 892 /* 893 * To remain completely output compatible with 894 * the legacy arc::print, we print 0 not as 895 * "0x0" but rather 0. 896 */ 897 mdb_printf("0\n"); 898 } else { 899 mdb_printf("0x%llx\n", stats[j].value.ui64); 900 } 901 902 break; 903 } 904 905 if (j == nstats) { 906 mdb_warn("couldn't find statistic in 'arc_stats' " 907 "for field '%s'\n", legacy[i].name); 908 } 909 } 910 911 mdb_printf("}\n"); 912 913 return (DCMD_OK); 914 } 915 916 /* 917 * ::spa 918 * 919 * -c Print configuration information as well 920 * -v Print vdev state 921 * -e Print vdev error stats 922 * 923 * Print a summarized spa_t. When given no arguments, prints out a table of all 924 * active pools on the system. 925 */ 926 /* ARGSUSED */ 927 static int 928 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 929 { 930 spa_t spa; 931 char poolname[MAXNAMELEN]; 932 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 933 "UNINIT", "UNAVAIL" }; 934 const char *state; 935 int config = FALSE; 936 int vdevs = FALSE; 937 int errors = FALSE; 938 939 if (mdb_getopts(argc, argv, 940 'c', MDB_OPT_SETBITS, TRUE, &config, 941 'v', MDB_OPT_SETBITS, TRUE, &vdevs, 942 'e', MDB_OPT_SETBITS, TRUE, &errors, 943 NULL) != argc) 944 return (DCMD_USAGE); 945 946 if (!(flags & DCMD_ADDRSPEC)) { 947 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 948 mdb_warn("can't walk spa"); 949 return (DCMD_ERR); 950 } 951 952 return (DCMD_OK); 953 } 954 955 if (flags & DCMD_PIPE_OUT) { 956 mdb_printf("%#lr\n", addr); 957 return (DCMD_OK); 958 } 959 960 if (DCMD_HDRSPEC(flags)) 961 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 962 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 963 964 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 965 mdb_warn("failed to read spa_t at %p", addr); 966 return (DCMD_ERR); 967 } 968 969 if (mdb_readstr(poolname, sizeof (poolname), (uintptr_t)spa.spa_name) 970 == -1) { 971 mdb_warn("failed to read pool name at %p", spa.spa_name); 972 return (DCMD_ERR); 973 } 974 975 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 976 state = "UNKNOWN"; 977 else 978 state = statetab[spa.spa_state]; 979 980 mdb_printf("%0?p %9s %s\n", addr, state, poolname); 981 982 if (config) { 983 mdb_printf("\n"); 984 mdb_inc_indent(4); 985 if (mdb_call_dcmd("spa_config", addr, flags, 0, 986 NULL) != DCMD_OK) 987 return (DCMD_ERR); 988 mdb_dec_indent(4); 989 } 990 991 if (vdevs || errors) { 992 mdb_arg_t v; 993 994 v.a_type = MDB_TYPE_STRING; 995 v.a_un.a_str = "-e"; 996 997 mdb_printf("\n"); 998 mdb_inc_indent(4); 999 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0, 1000 &v) != DCMD_OK) 1001 return (DCMD_ERR); 1002 mdb_dec_indent(4); 1003 } 1004 1005 return (DCMD_OK); 1006 } 1007 1008 /* 1009 * ::spa_config 1010 * 1011 * Given a spa_t, print the configuration information stored in spa_config. 1012 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1013 * We simply read the value of spa_config and pass off to ::nvlist. 1014 */ 1015 /* ARGSUSED */ 1016 static int 1017 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1018 { 1019 spa_t spa; 1020 1021 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1022 return (DCMD_USAGE); 1023 1024 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1025 mdb_warn("failed to read spa_t at %p", addr); 1026 return (DCMD_ERR); 1027 } 1028 1029 if (spa.spa_config == NULL) { 1030 mdb_printf("(none)\n"); 1031 return (DCMD_OK); 1032 } 1033 1034 return (mdb_call_dcmd("nvlist", (uintptr_t)spa.spa_config, flags, 1035 0, NULL)); 1036 } 1037 1038 void 1039 vdev_help(void) 1040 { 1041 mdb_printf("[vdev_t*]::vdev [-er]\n" 1042 "\t-> -e display vdev stats\n" 1043 "\t-> -r recursive (visit all children)\n"); 1044 } 1045 1046 /* 1047 * ::vdev 1048 * 1049 * Print out a summarized vdev_t, in the following form: 1050 * 1051 * ADDR STATE AUX DESC 1052 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1053 * 1054 * If '-r' is specified, recursively visit all children. 1055 * 1056 * With '-e', the statistics associated with the vdev are printed as well. 1057 */ 1058 static int 1059 do_print_vdev(uintptr_t addr, int flags, int depth, int stats, 1060 int recursive) 1061 { 1062 vdev_t vdev; 1063 char desc[MAXNAMELEN]; 1064 int c, children; 1065 uintptr_t *child; 1066 const char *state, *aux; 1067 1068 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1069 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1070 return (DCMD_ERR); 1071 } 1072 1073 if (flags & DCMD_PIPE_OUT) { 1074 mdb_printf("%#lr", addr); 1075 } else { 1076 if (vdev.vdev_path != NULL) { 1077 if (mdb_readstr(desc, sizeof (desc), 1078 (uintptr_t)vdev.vdev_path) == -1) { 1079 mdb_warn("failed to read vdev_path at %p\n", 1080 vdev.vdev_path); 1081 return (DCMD_ERR); 1082 } 1083 } else if (vdev.vdev_ops != NULL) { 1084 vdev_ops_t ops; 1085 if (mdb_vread(&ops, sizeof (ops), 1086 (uintptr_t)vdev.vdev_ops) == -1) { 1087 mdb_warn("failed to read vdev_ops at %p\n", 1088 vdev.vdev_ops); 1089 return (DCMD_ERR); 1090 } 1091 (void) strcpy(desc, ops.vdev_op_type); 1092 } else { 1093 (void) strcpy(desc, "<unknown>"); 1094 } 1095 1096 if (depth == 0 && DCMD_HDRSPEC(flags)) 1097 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1098 "ADDR", "STATE", "AUX", 1099 sizeof (uintptr_t) == 4 ? 43 : 35, 1100 "DESCRIPTION"); 1101 1102 mdb_printf("%0?p ", addr); 1103 1104 switch (vdev.vdev_state) { 1105 case VDEV_STATE_CLOSED: 1106 state = "CLOSED"; 1107 break; 1108 case VDEV_STATE_OFFLINE: 1109 state = "OFFLINE"; 1110 break; 1111 case VDEV_STATE_CANT_OPEN: 1112 state = "CANT_OPEN"; 1113 break; 1114 case VDEV_STATE_DEGRADED: 1115 state = "DEGRADED"; 1116 break; 1117 case VDEV_STATE_HEALTHY: 1118 state = "HEALTHY"; 1119 break; 1120 case VDEV_STATE_REMOVED: 1121 state = "REMOVED"; 1122 break; 1123 case VDEV_STATE_FAULTED: 1124 state = "FAULTED"; 1125 break; 1126 default: 1127 state = "UNKNOWN"; 1128 break; 1129 } 1130 1131 switch (vdev.vdev_stat.vs_aux) { 1132 case VDEV_AUX_NONE: 1133 aux = "-"; 1134 break; 1135 case VDEV_AUX_OPEN_FAILED: 1136 aux = "OPEN_FAILED"; 1137 break; 1138 case VDEV_AUX_CORRUPT_DATA: 1139 aux = "CORRUPT_DATA"; 1140 break; 1141 case VDEV_AUX_NO_REPLICAS: 1142 aux = "NO_REPLICAS"; 1143 break; 1144 case VDEV_AUX_BAD_GUID_SUM: 1145 aux = "BAD_GUID_SUM"; 1146 break; 1147 case VDEV_AUX_TOO_SMALL: 1148 aux = "TOO_SMALL"; 1149 break; 1150 case VDEV_AUX_BAD_LABEL: 1151 aux = "BAD_LABEL"; 1152 break; 1153 default: 1154 aux = "UNKNOWN"; 1155 break; 1156 } 1157 1158 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1159 1160 if (stats) { 1161 vdev_stat_t *vs = &vdev.vdev_stat; 1162 int i; 1163 1164 mdb_inc_indent(4); 1165 mdb_printf("\n"); 1166 mdb_printf("%<u> %12s %12s %12s %12s " 1167 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1168 "IOCTL"); 1169 mdb_printf("OPS "); 1170 for (i = 1; i < ZIO_TYPES; i++) 1171 mdb_printf("%11#llx%s", vs->vs_ops[i], 1172 i == ZIO_TYPES - 1 ? "" : " "); 1173 mdb_printf("\n"); 1174 mdb_printf("BYTES "); 1175 for (i = 1; i < ZIO_TYPES; i++) 1176 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1177 i == ZIO_TYPES - 1 ? "" : " "); 1178 1179 1180 mdb_printf("\n"); 1181 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1182 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1183 mdb_printf("ECKSUM %10#llx\n", 1184 vs->vs_checksum_errors); 1185 mdb_dec_indent(4); 1186 } 1187 1188 if (stats) 1189 mdb_printf("\n"); 1190 } 1191 1192 children = vdev.vdev_children; 1193 1194 if (children == 0 || !recursive) 1195 return (DCMD_OK); 1196 1197 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1198 if (mdb_vread(child, children * sizeof (void *), 1199 (uintptr_t)vdev.vdev_child) == -1) { 1200 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1201 return (DCMD_ERR); 1202 } 1203 1204 for (c = 0; c < children; c++) { 1205 if (do_print_vdev(child[c], flags, depth + 2, stats, 1206 recursive)) 1207 return (DCMD_ERR); 1208 } 1209 1210 return (DCMD_OK); 1211 } 1212 1213 static int 1214 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1215 { 1216 int recursive = FALSE; 1217 int stats = FALSE; 1218 1219 if (mdb_getopts(argc, argv, 1220 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1221 'e', MDB_OPT_SETBITS, TRUE, &stats, 1222 NULL) != argc) 1223 return (DCMD_USAGE); 1224 1225 if (!(flags & DCMD_ADDRSPEC)) { 1226 mdb_warn("no vdev_t address given\n"); 1227 return (DCMD_ERR); 1228 } 1229 1230 return (do_print_vdev(addr, flags, 0, stats, recursive)); 1231 } 1232 1233 typedef struct metaslab_walk_data { 1234 uint64_t mw_numvdevs; 1235 uintptr_t *mw_vdevs; 1236 int mw_curvdev; 1237 uint64_t mw_nummss; 1238 uintptr_t *mw_mss; 1239 int mw_curms; 1240 } metaslab_walk_data_t; 1241 1242 static int 1243 metaslab_walk_step(mdb_walk_state_t *wsp) 1244 { 1245 metaslab_walk_data_t *mw = wsp->walk_data; 1246 metaslab_t ms; 1247 uintptr_t msp; 1248 1249 if (mw->mw_curvdev >= mw->mw_numvdevs) 1250 return (WALK_DONE); 1251 1252 if (mw->mw_mss == NULL) { 1253 uintptr_t mssp; 1254 uintptr_t vdevp; 1255 1256 ASSERT(mw->mw_curms == 0); 1257 ASSERT(mw->mw_nummss == 0); 1258 1259 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1260 if (GETMEMB(vdevp, struct vdev, vdev_ms, mssp) || 1261 GETMEMB(vdevp, struct vdev, vdev_ms_count, mw->mw_nummss)) { 1262 return (WALK_ERR); 1263 } 1264 1265 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1266 UM_SLEEP | UM_GC); 1267 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1268 mssp) == -1) { 1269 mdb_warn("failed to read vdev_ms at %p", mssp); 1270 return (WALK_ERR); 1271 } 1272 } 1273 1274 if (mw->mw_curms >= mw->mw_nummss) { 1275 mw->mw_mss = NULL; 1276 mw->mw_curms = 0; 1277 mw->mw_nummss = 0; 1278 mw->mw_curvdev++; 1279 return (WALK_NEXT); 1280 } 1281 1282 msp = mw->mw_mss[mw->mw_curms]; 1283 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1284 mdb_warn("failed to read metaslab_t at %p", msp); 1285 return (WALK_ERR); 1286 } 1287 1288 mw->mw_curms++; 1289 1290 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1291 } 1292 1293 /* ARGSUSED */ 1294 static int 1295 metaslab_walk_init(mdb_walk_state_t *wsp) 1296 { 1297 metaslab_walk_data_t *mw; 1298 uintptr_t root_vdevp; 1299 uintptr_t childp; 1300 1301 if (wsp->walk_addr == NULL) { 1302 mdb_warn("must supply address of spa_t\n"); 1303 return (WALK_ERR); 1304 } 1305 1306 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1307 1308 if (GETMEMB(wsp->walk_addr, struct spa, spa_root_vdev, root_vdevp) || 1309 GETMEMB(root_vdevp, struct vdev, vdev_children, mw->mw_numvdevs) || 1310 GETMEMB(root_vdevp, struct vdev, vdev_child, childp)) { 1311 return (DCMD_ERR); 1312 } 1313 1314 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1315 UM_SLEEP | UM_GC); 1316 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1317 childp) == -1) { 1318 mdb_warn("failed to read root vdev children at %p", childp); 1319 return (DCMD_ERR); 1320 } 1321 1322 wsp->walk_data = mw; 1323 1324 return (WALK_NEXT); 1325 } 1326 1327 typedef struct mdb_spa { 1328 uintptr_t spa_dsl_pool; 1329 uintptr_t spa_root_vdev; 1330 } mdb_spa_t; 1331 1332 typedef struct mdb_dsl_dir { 1333 uintptr_t dd_phys; 1334 uint64_t dd_used_bytes; 1335 int64_t dd_space_towrite[TXG_SIZE]; 1336 } mdb_dsl_dir_t; 1337 1338 typedef struct mdb_dsl_dir_phys { 1339 uint64_t dd_used_bytes; 1340 uint64_t dd_compressed_bytes; 1341 uint64_t dd_uncompressed_bytes; 1342 } mdb_dsl_dir_phys_t; 1343 1344 typedef struct mdb_vdev { 1345 uintptr_t vdev_parent; 1346 uintptr_t vdev_ms; 1347 uint64_t vdev_ms_count; 1348 vdev_stat_t vdev_stat; 1349 } mdb_vdev_t; 1350 1351 typedef struct mdb_metaslab { 1352 space_map_t ms_allocmap[TXG_SIZE]; 1353 space_map_t ms_freemap[TXG_SIZE]; 1354 space_map_t ms_map; 1355 space_map_obj_t ms_smo; 1356 space_map_obj_t ms_smo_syncing; 1357 } mdb_metaslab_t; 1358 1359 typedef struct space_data { 1360 uint64_t ms_allocmap[TXG_SIZE]; 1361 uint64_t ms_freemap[TXG_SIZE]; 1362 uint64_t ms_map; 1363 uint64_t avail; 1364 uint64_t nowavail; 1365 } space_data_t; 1366 1367 /* ARGSUSED */ 1368 static int 1369 space_cb(uintptr_t addr, const void *unknown, void *arg) 1370 { 1371 space_data_t *sd = arg; 1372 mdb_metaslab_t ms; 1373 1374 if (GETMEMB(addr, struct metaslab, ms_allocmap, ms.ms_allocmap) || 1375 GETMEMB(addr, struct metaslab, ms_freemap, ms.ms_freemap) || 1376 GETMEMB(addr, struct metaslab, ms_map, ms.ms_map) || 1377 GETMEMB(addr, struct metaslab, ms_smo, ms.ms_smo) || 1378 GETMEMB(addr, struct metaslab, ms_smo_syncing, ms.ms_smo_syncing)) { 1379 return (WALK_ERR); 1380 } 1381 1382 sd->ms_allocmap[0] += ms.ms_allocmap[0].sm_space; 1383 sd->ms_allocmap[1] += ms.ms_allocmap[1].sm_space; 1384 sd->ms_allocmap[2] += ms.ms_allocmap[2].sm_space; 1385 sd->ms_allocmap[3] += ms.ms_allocmap[3].sm_space; 1386 sd->ms_freemap[0] += ms.ms_freemap[0].sm_space; 1387 sd->ms_freemap[1] += ms.ms_freemap[1].sm_space; 1388 sd->ms_freemap[2] += ms.ms_freemap[2].sm_space; 1389 sd->ms_freemap[3] += ms.ms_freemap[3].sm_space; 1390 sd->ms_map += ms.ms_map.sm_space; 1391 sd->avail += ms.ms_map.sm_size - ms.ms_smo.smo_alloc; 1392 sd->nowavail += ms.ms_map.sm_size - ms.ms_smo_syncing.smo_alloc; 1393 1394 return (WALK_NEXT); 1395 } 1396 1397 /* 1398 * ::spa_space [-b] 1399 * 1400 * Given a spa_t, print out it's on-disk space usage and in-core 1401 * estimates of future usage. If -b is given, print space in bytes. 1402 * Otherwise print in megabytes. 1403 */ 1404 /* ARGSUSED */ 1405 static int 1406 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1407 { 1408 mdb_spa_t spa; 1409 uintptr_t dp_root_dir; 1410 mdb_dsl_dir_t dd; 1411 mdb_dsl_dir_phys_t dsp; 1412 uint64_t children; 1413 uintptr_t childaddr; 1414 space_data_t sd; 1415 int shift = 20; 1416 char *suffix = "M"; 1417 int bits = FALSE; 1418 1419 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bits, NULL) != 1420 argc) 1421 return (DCMD_USAGE); 1422 if (!(flags & DCMD_ADDRSPEC)) 1423 return (DCMD_USAGE); 1424 1425 if (bits) { 1426 shift = 0; 1427 suffix = ""; 1428 } 1429 1430 if (GETMEMB(addr, struct spa, spa_dsl_pool, spa.spa_dsl_pool) || 1431 GETMEMB(addr, struct spa, spa_root_vdev, spa.spa_root_vdev) || 1432 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_children, children) || 1433 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_child, childaddr) || 1434 GETMEMB(spa.spa_dsl_pool, struct dsl_pool, 1435 dp_root_dir, dp_root_dir) || 1436 GETMEMB(dp_root_dir, struct dsl_dir, dd_phys, dd.dd_phys) || 1437 GETMEMB(dp_root_dir, struct dsl_dir, 1438 dd_used_bytes, dd.dd_used_bytes) || 1439 GETMEMB(dp_root_dir, struct dsl_dir, 1440 dd_space_towrite, dd.dd_space_towrite) || 1441 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1442 dd_used_bytes, dsp.dd_used_bytes) || 1443 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1444 dd_compressed_bytes, dsp.dd_compressed_bytes) || 1445 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1446 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) { 1447 return (DCMD_ERR); 1448 } 1449 1450 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1451 dd.dd_space_towrite[0] >> shift, suffix, 1452 dd.dd_space_towrite[1] >> shift, suffix, 1453 dd.dd_space_towrite[2] >> shift, suffix, 1454 dd.dd_space_towrite[3] >> shift, suffix); 1455 mdb_printf("dd_used_bytes = %llu%s\n", 1456 dd.dd_used_bytes >> shift, suffix); 1457 1458 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1459 dsp.dd_used_bytes >> shift, suffix); 1460 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1461 dsp.dd_compressed_bytes >> shift, suffix); 1462 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1463 dsp.dd_uncompressed_bytes >> shift, suffix); 1464 1465 bzero(&sd, sizeof (sd)); 1466 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1467 mdb_warn("can't walk metaslabs"); 1468 return (DCMD_ERR); 1469 } 1470 1471 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1472 sd.ms_allocmap[0] >> shift, suffix, 1473 sd.ms_allocmap[1] >> shift, suffix, 1474 sd.ms_allocmap[2] >> shift, suffix, 1475 sd.ms_allocmap[3] >> shift, suffix); 1476 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1477 sd.ms_freemap[0] >> shift, suffix, 1478 sd.ms_freemap[1] >> shift, suffix, 1479 sd.ms_freemap[2] >> shift, suffix, 1480 sd.ms_freemap[3] >> shift, suffix); 1481 mdb_printf("ms_map = %llu%s\n", sd.ms_map >> shift, suffix); 1482 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1483 mdb_printf("current syncing avail = %llu%s\n", 1484 sd.nowavail >> shift, suffix); 1485 1486 return (DCMD_OK); 1487 } 1488 1489 /* 1490 * ::spa_verify 1491 * 1492 * Given a spa_t, verify that that the pool is self-consistent. 1493 * Currently, it only checks to make sure that the vdev tree exists. 1494 */ 1495 /* ARGSUSED */ 1496 static int 1497 spa_verify(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1498 { 1499 spa_t spa; 1500 1501 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1502 return (DCMD_USAGE); 1503 1504 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1505 mdb_warn("failed to read spa_t at %p", addr); 1506 return (DCMD_ERR); 1507 } 1508 1509 if (spa.spa_root_vdev == NULL) { 1510 mdb_printf("no vdev tree present\n"); 1511 return (DCMD_OK); 1512 } 1513 1514 return (DCMD_OK); 1515 } 1516 1517 /* 1518 * ::spa_vdevs 1519 * 1520 * -e Include error stats 1521 * 1522 * Print out a summarized list of vdevs for the given spa_t. 1523 * This is accomplished by invoking "::vdev -re" on the root vdev. 1524 */ 1525 /* ARGSUSED */ 1526 static int 1527 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1528 { 1529 spa_t spa; 1530 mdb_arg_t v; 1531 int errors = FALSE; 1532 1533 if (mdb_getopts(argc, argv, 1534 'e', MDB_OPT_SETBITS, TRUE, &errors, 1535 NULL) != argc) 1536 return (DCMD_USAGE); 1537 1538 if (!(flags & DCMD_ADDRSPEC)) 1539 return (DCMD_USAGE); 1540 1541 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1542 mdb_warn("failed to read spa_t at %p", addr); 1543 return (DCMD_ERR); 1544 } 1545 1546 /* 1547 * Unitialized spa_t structures can have a NULL root vdev. 1548 */ 1549 if (spa.spa_root_vdev == NULL) { 1550 mdb_printf("no associated vdevs\n"); 1551 return (DCMD_OK); 1552 } 1553 1554 v.a_type = MDB_TYPE_STRING; 1555 v.a_un.a_str = errors ? "-re" : "-r"; 1556 1557 return (mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1558 flags, 1, &v)); 1559 } 1560 1561 /* 1562 * ::zio 1563 * 1564 * Print a summary of zio_t and all its children. This is intended to display a 1565 * zio tree, and hence we only pick the most important pieces of information for 1566 * the main summary. More detailed information can always be found by doing a 1567 * '::print zio' on the underlying zio_t. The columns we display are: 1568 * 1569 * ADDRESS TYPE STAGE WAITER 1570 * 1571 * The 'address' column is indented by one space for each depth level as we 1572 * descend down the tree. 1573 */ 1574 1575 #define ZIO_MAXDEPTH 16 1576 1577 static int 1578 zio_print_cb(uintptr_t addr, const void *data, void *priv) 1579 { 1580 const zio_t *zio = data; 1581 uintptr_t depth = (uintptr_t)priv; 1582 mdb_ctf_id_t type_enum, stage_enum; 1583 const char *type, *stage; 1584 int maxdepth; 1585 1586 maxdepth = sizeof (uintptr_t) * 2 + ZIO_MAXDEPTH; 1587 if (depth > ZIO_MAXDEPTH) 1588 depth = ZIO_MAXDEPTH; 1589 1590 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 1591 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 1592 mdb_warn("failed to lookup zio enums"); 1593 return (WALK_ERR); 1594 } 1595 1596 if ((type = mdb_ctf_enum_name(type_enum, zio->io_type)) != NULL) 1597 type += sizeof ("ZIO_TYPE_") - 1; 1598 else 1599 type = "?"; 1600 1601 if ((stage = mdb_ctf_enum_name(stage_enum, zio->io_stage)) != NULL) 1602 stage += sizeof ("ZIO_STAGE_") - 1; 1603 else 1604 stage = "?"; 1605 1606 1607 mdb_printf("%*s%-*p %-5s %-22s ", 1608 depth, "", maxdepth - depth, addr, type, stage); 1609 if (zio->io_waiter) 1610 mdb_printf("%?p\n", zio->io_waiter); 1611 else 1612 mdb_printf("-\n"); 1613 1614 if (mdb_pwalk("zio_child", zio_print_cb, (void *)(depth + 1), 1615 addr) != 0) { 1616 mdb_warn("failed to walk zio_t children at %p\n", addr); 1617 return (WALK_ERR); 1618 } 1619 1620 return (WALK_NEXT); 1621 } 1622 1623 /*ARGSUSED*/ 1624 static int 1625 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1626 { 1627 zio_t zio; 1628 int maxdepth; 1629 1630 maxdepth = sizeof (uintptr_t) * 2 + ZIO_MAXDEPTH; 1631 1632 if (!(flags & DCMD_ADDRSPEC)) 1633 return (DCMD_USAGE); 1634 1635 if (mdb_vread(&zio, sizeof (zio_t), addr) == -1) { 1636 mdb_warn("failed to read zio_t at %p", addr); 1637 return (DCMD_ERR); 1638 } 1639 1640 if (DCMD_HDRSPEC(flags)) 1641 mdb_printf("%<u>%-*s %-5s %-22s %-?s%</u>\n", maxdepth, 1642 "ADDRESS", "TYPE", "STAGE", "WAITER"); 1643 1644 if (zio_print_cb(addr, &zio, NULL) != WALK_NEXT) 1645 return (DCMD_ERR); 1646 1647 return (DCMD_OK); 1648 } 1649 1650 /* 1651 * [addr]::zio_state 1652 * 1653 * Print a summary of all zio_t structures on the system, or for a particular 1654 * pool. This is equivalent to '::walk zio_root | ::zio'. 1655 */ 1656 /*ARGSUSED*/ 1657 static int 1658 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1659 { 1660 /* 1661 * MDB will remember the last address of the pipeline, so if we don't 1662 * zero this we'll end up trying to walk zio structures for a 1663 * non-existent spa_t. 1664 */ 1665 if (!(flags & DCMD_ADDRSPEC)) 1666 addr = 0; 1667 1668 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 1669 } 1670 1671 typedef struct txg_list_walk_data { 1672 uintptr_t lw_head[TXG_SIZE]; 1673 int lw_txgoff; 1674 int lw_maxoff; 1675 size_t lw_offset; 1676 void *lw_obj; 1677 } txg_list_walk_data_t; 1678 1679 static int 1680 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 1681 { 1682 txg_list_walk_data_t *lwd; 1683 txg_list_t list; 1684 int i; 1685 1686 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 1687 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 1688 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 1689 return (WALK_ERR); 1690 } 1691 1692 for (i = 0; i < TXG_SIZE; i++) 1693 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 1694 lwd->lw_offset = list.tl_offset; 1695 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 1696 UM_SLEEP | UM_GC); 1697 lwd->lw_txgoff = txg; 1698 lwd->lw_maxoff = maxoff; 1699 1700 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1701 wsp->walk_data = lwd; 1702 1703 return (WALK_NEXT); 1704 } 1705 1706 static int 1707 txg_list_walk_init(mdb_walk_state_t *wsp) 1708 { 1709 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 1710 } 1711 1712 static int 1713 txg_list0_walk_init(mdb_walk_state_t *wsp) 1714 { 1715 return (txg_list_walk_init_common(wsp, 0, 0)); 1716 } 1717 1718 static int 1719 txg_list1_walk_init(mdb_walk_state_t *wsp) 1720 { 1721 return (txg_list_walk_init_common(wsp, 1, 1)); 1722 } 1723 1724 static int 1725 txg_list2_walk_init(mdb_walk_state_t *wsp) 1726 { 1727 return (txg_list_walk_init_common(wsp, 2, 2)); 1728 } 1729 1730 static int 1731 txg_list3_walk_init(mdb_walk_state_t *wsp) 1732 { 1733 return (txg_list_walk_init_common(wsp, 3, 3)); 1734 } 1735 1736 static int 1737 txg_list_walk_step(mdb_walk_state_t *wsp) 1738 { 1739 txg_list_walk_data_t *lwd = wsp->walk_data; 1740 uintptr_t addr; 1741 txg_node_t *node; 1742 int status; 1743 1744 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 1745 lwd->lw_txgoff++; 1746 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1747 } 1748 1749 if (wsp->walk_addr == NULL) 1750 return (WALK_DONE); 1751 1752 addr = wsp->walk_addr - lwd->lw_offset; 1753 1754 if (mdb_vread(lwd->lw_obj, 1755 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 1756 mdb_warn("failed to read list element at %#lx", addr); 1757 return (WALK_ERR); 1758 } 1759 1760 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 1761 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 1762 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 1763 1764 return (status); 1765 } 1766 1767 /* 1768 * ::walk spa 1769 * 1770 * Walk all named spa_t structures in the namespace. This is nothing more than 1771 * a layered avl walk. 1772 */ 1773 static int 1774 spa_walk_init(mdb_walk_state_t *wsp) 1775 { 1776 GElf_Sym sym; 1777 1778 if (wsp->walk_addr != NULL) { 1779 mdb_warn("spa walk only supports global walks\n"); 1780 return (WALK_ERR); 1781 } 1782 1783 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 1784 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 1785 return (WALK_ERR); 1786 } 1787 1788 wsp->walk_addr = (uintptr_t)sym.st_value; 1789 1790 if (mdb_layered_walk("avl", wsp) == -1) { 1791 mdb_warn("failed to walk 'avl'\n"); 1792 return (WALK_ERR); 1793 } 1794 1795 return (WALK_NEXT); 1796 } 1797 1798 static int 1799 spa_walk_step(mdb_walk_state_t *wsp) 1800 { 1801 spa_t spa; 1802 1803 if (mdb_vread(&spa, sizeof (spa), wsp->walk_addr) == -1) { 1804 mdb_warn("failed to read spa_t at %p", wsp->walk_addr); 1805 return (WALK_ERR); 1806 } 1807 1808 return (wsp->walk_callback(wsp->walk_addr, &spa, wsp->walk_cbdata)); 1809 } 1810 1811 /* 1812 * [addr]::walk zio 1813 * 1814 * Walk all active zio_t structures on the system. This is simply a layered 1815 * walk on top of ::walk zio_cache, with the optional ability to limit the 1816 * structures to a particular pool. 1817 */ 1818 static int 1819 zio_walk_init(mdb_walk_state_t *wsp) 1820 { 1821 wsp->walk_data = (void *)wsp->walk_addr; 1822 1823 if (mdb_layered_walk("zio_cache", wsp) == -1) { 1824 mdb_warn("failed to walk 'zio_cache'\n"); 1825 return (WALK_ERR); 1826 } 1827 1828 return (WALK_NEXT); 1829 } 1830 1831 static int 1832 zio_walk_step(mdb_walk_state_t *wsp) 1833 { 1834 zio_t zio; 1835 1836 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1837 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1838 return (WALK_ERR); 1839 } 1840 1841 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 1842 return (WALK_NEXT); 1843 1844 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 1845 } 1846 1847 /* 1848 * ::walk zio_child 1849 * 1850 * Walk the children of a zio_t structure. 1851 */ 1852 static int 1853 zio_child_walk_init(mdb_walk_state_t *wsp) 1854 { 1855 zio_t zio; 1856 1857 if (wsp->walk_addr == 0) { 1858 mdb_warn("::walk zio_child doesn't support global walks\n"); 1859 return (WALK_ERR); 1860 } 1861 1862 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1863 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1864 return (WALK_ERR); 1865 } 1866 1867 wsp->walk_addr = (uintptr_t)zio.io_child; 1868 return (WALK_NEXT); 1869 } 1870 1871 static int 1872 zio_sibling_walk_step(mdb_walk_state_t *wsp) 1873 { 1874 zio_t zio; 1875 int status; 1876 1877 if (wsp->walk_addr == NULL) 1878 return (WALK_DONE); 1879 1880 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1881 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1882 return (WALK_ERR); 1883 } 1884 1885 status = wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata); 1886 1887 wsp->walk_addr = (uintptr_t)zio.io_sibling_next; 1888 return (status); 1889 } 1890 1891 /* 1892 * [addr]::walk zio_root 1893 * 1894 * Walk only root zio_t structures, optionally for a particular spa_t. 1895 */ 1896 static int 1897 zio_walk_root_step(mdb_walk_state_t *wsp) 1898 { 1899 zio_t zio; 1900 1901 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1902 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1903 return (WALK_ERR); 1904 } 1905 1906 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 1907 return (WALK_NEXT); 1908 1909 if ((uintptr_t)zio.io_root != wsp->walk_addr) 1910 return (WALK_NEXT); 1911 1912 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 1913 } 1914 1915 /* 1916 * MDB module linkage information: 1917 * 1918 * We declare a list of structures describing our dcmds, and a function 1919 * named _mdb_init to return a pointer to our module information. 1920 */ 1921 1922 static const mdb_dcmd_t dcmds[] = { 1923 { "arc", "[-a]", "print ARC variables", arc_print }, 1924 { "blkptr", ":", "print blkptr_t", blkptr }, 1925 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 1926 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 1927 { "dbufs", 1928 "\t[-O objset_t*] [-n objset_name | \"mos\"] [-o object | \"mdn\"] \n" 1929 "\t[-l level] [-b blkid | \"bonus\"]", 1930 "find dmu_buf_impl_t's that meet criterion", dbufs }, 1931 { "abuf_find", "dva_word[0] dva_word[1]", 1932 "find arc_buf_hdr_t of a specified DVA", 1933 abuf_find }, 1934 { "spa", "?[-cv]", "spa_t summary", spa_print }, 1935 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 1936 { "spa_verify", ":", "verify spa_t consistency", spa_verify }, 1937 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 1938 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs }, 1939 { "vdev", ":[-re]", "vdev_t summary", vdev_print }, 1940 { "zio", ":", "zio_t summary", zio_print }, 1941 { "zio_state", "?", "print out all zio_t structures on system or " 1942 "for a particular pool", zio_state }, 1943 { "zio_pipeline", ":", "decode a zio pipeline", zio_pipeline }, 1944 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 1945 { NULL } 1946 }; 1947 1948 static const mdb_walker_t walkers[] = { 1949 /* 1950 * In userland, there is no generic provider of list_t walkers, so we 1951 * need to add it. 1952 */ 1953 #ifndef _KERNEL 1954 { LIST_WALK_NAME, LIST_WALK_DESC, 1955 list_walk_init, list_walk_step, list_walk_fini }, 1956 #endif 1957 { "zms_freelist", "walk ZFS metaslab freelist", 1958 freelist_walk_init, freelist_walk_step, NULL }, 1959 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 1960 txg_list_walk_init, txg_list_walk_step, NULL }, 1961 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 1962 txg_list0_walk_init, txg_list_walk_step, NULL }, 1963 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 1964 txg_list1_walk_init, txg_list_walk_step, NULL }, 1965 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 1966 txg_list2_walk_init, txg_list_walk_step, NULL }, 1967 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 1968 txg_list3_walk_init, txg_list_walk_step, NULL }, 1969 { "zio", "walk all zio structures, optionally for a particular spa_t", 1970 zio_walk_init, zio_walk_step, NULL }, 1971 { "zio_child", "walk children of a zio_t structure", 1972 zio_child_walk_init, zio_sibling_walk_step, NULL }, 1973 { "zio_root", "walk all root zio_t structures, optionally for a " 1974 "particular spa_t", 1975 zio_walk_init, zio_walk_root_step, NULL }, 1976 { "spa", "walk all spa_t entries in the namespace", 1977 spa_walk_init, spa_walk_step, NULL }, 1978 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 1979 metaslab_walk_init, metaslab_walk_step, NULL }, 1980 { NULL } 1981 }; 1982 1983 static const mdb_modinfo_t modinfo = { 1984 MDB_API_VERSION, dcmds, walkers 1985 }; 1986 1987 const mdb_modinfo_t * 1988 _mdb_init(void) 1989 { 1990 return (&modinfo); 1991 } 1992