1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <mdb/mdb_ctf.h> 27 #include <sys/zfs_context.h> 28 #include <sys/mdb_modapi.h> 29 #include <sys/dbuf.h> 30 #include <sys/dmu_objset.h> 31 #include <sys/dsl_dir.h> 32 #include <sys/dsl_pool.h> 33 #include <sys/metaslab_impl.h> 34 #include <sys/space_map.h> 35 #include <sys/list.h> 36 #include <sys/spa_impl.h> 37 #include <sys/vdev_impl.h> 38 #include <sys/zio_compress.h> 39 40 #ifndef _KERNEL 41 #include "../genunix/list.h" 42 #endif 43 44 #ifdef _KERNEL 45 #define ZFS_OBJ_NAME "zfs" 46 #else 47 #define ZFS_OBJ_NAME "libzpool.so.1" 48 #endif 49 50 static char * 51 local_strdup(const char *s) 52 { 53 char *s1 = mdb_alloc(strlen(s) + 1, UM_SLEEP); 54 55 (void) strcpy(s1, s); 56 return (s1); 57 } 58 59 static int 60 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 61 const char *member, int len, void *buf) 62 { 63 mdb_ctf_id_t id; 64 ulong_t off; 65 char name[64]; 66 67 if (idp == NULL) { 68 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 69 mdb_warn("couldn't find type %s", type); 70 return (DCMD_ERR); 71 } 72 idp = &id; 73 } else { 74 type = name; 75 mdb_ctf_type_name(*idp, name, sizeof (name)); 76 } 77 78 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 79 mdb_warn("couldn't find member %s of type %s\n", member, type); 80 return (DCMD_ERR); 81 } 82 if (off % 8 != 0) { 83 mdb_warn("member %s of type %s is unsupported bitfield", 84 member, type); 85 return (DCMD_ERR); 86 } 87 off /= 8; 88 89 if (mdb_vread(buf, len, addr + off) == -1) { 90 mdb_warn("failed to read %s from %s at %p", 91 member, type, addr + off); 92 return (DCMD_ERR); 93 } 94 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 95 96 return (0); 97 } 98 99 #define GETMEMB(addr, type, member, dest) \ 100 getmember(addr, #type, NULL, #member, sizeof (dest), &(dest)) 101 102 #define GETMEMBID(addr, ctfid, member, dest) \ 103 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 104 105 static int 106 getrefcount(uintptr_t addr, mdb_ctf_id_t *id, 107 const char *member, uint64_t *rc) 108 { 109 static int gotid; 110 static mdb_ctf_id_t rc_id; 111 ulong_t off; 112 113 if (!gotid) { 114 if (mdb_ctf_lookup_by_name("struct refcount", &rc_id) == -1) { 115 mdb_warn("couldn't find struct refcount"); 116 return (DCMD_ERR); 117 } 118 gotid = TRUE; 119 } 120 121 if (mdb_ctf_offsetof(*id, member, &off) == -1) { 122 char name[64]; 123 mdb_ctf_type_name(*id, name, sizeof (name)); 124 mdb_warn("couldn't find member %s of type %s\n", member, name); 125 return (DCMD_ERR); 126 } 127 off /= 8; 128 129 return (GETMEMBID(addr + off, &rc_id, rc_count, *rc)); 130 } 131 132 static int 133 read_symbol(char *sym_name, void **bufp) 134 { 135 GElf_Sym sym; 136 137 if (mdb_lookup_by_obj(MDB_TGT_OBJ_EVERY, sym_name, &sym)) { 138 mdb_warn("can't find symbol %s", sym_name); 139 return (DCMD_ERR); 140 } 141 142 *bufp = mdb_alloc(sym.st_size, UM_SLEEP); 143 144 if (mdb_vread(*bufp, sym.st_size, sym.st_value) == -1) { 145 mdb_warn("can't read data for symbol %s", sym_name); 146 mdb_free(*bufp, sym.st_size); 147 return (DCMD_ERR); 148 } 149 150 return (DCMD_OK); 151 } 152 153 static int verbose; 154 155 static int 156 freelist_walk_init(mdb_walk_state_t *wsp) 157 { 158 if (wsp->walk_addr == NULL) { 159 mdb_warn("must supply starting address\n"); 160 return (WALK_ERR); 161 } 162 163 wsp->walk_data = 0; /* Index into the freelist */ 164 return (WALK_NEXT); 165 } 166 167 static int 168 freelist_walk_step(mdb_walk_state_t *wsp) 169 { 170 uint64_t entry; 171 uintptr_t number = (uintptr_t)wsp->walk_data; 172 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID", 173 "INVALID", "INVALID", "INVALID", "INVALID" }; 174 int mapshift = SPA_MINBLOCKSHIFT; 175 176 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) { 177 mdb_warn("failed to read freelist entry %p", wsp->walk_addr); 178 return (WALK_DONE); 179 } 180 wsp->walk_addr += sizeof (entry); 181 wsp->walk_data = (void *)(number + 1); 182 183 if (SM_DEBUG_DECODE(entry)) { 184 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n", 185 number, 186 ddata[SM_DEBUG_ACTION_DECODE(entry)], 187 SM_DEBUG_TXG_DECODE(entry), 188 SM_DEBUG_SYNCPASS_DECODE(entry)); 189 } else { 190 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c " 191 "size=%06llx", number, 192 SM_OFFSET_DECODE(entry) << mapshift, 193 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) << 194 mapshift, 195 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F', 196 SM_RUN_DECODE(entry) << mapshift); 197 if (verbose) 198 mdb_printf(" (raw=%012llx)\n", entry); 199 mdb_printf("\n"); 200 } 201 return (WALK_NEXT); 202 } 203 204 205 static int 206 dataset_name(uintptr_t addr, char *buf) 207 { 208 static int gotid; 209 static mdb_ctf_id_t dd_id; 210 uintptr_t dd_parent; 211 char dd_myname[MAXNAMELEN]; 212 213 if (!gotid) { 214 if (mdb_ctf_lookup_by_name("struct dsl_dir", 215 &dd_id) == -1) { 216 mdb_warn("couldn't find struct dsl_dir"); 217 return (DCMD_ERR); 218 } 219 gotid = TRUE; 220 } 221 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 222 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 223 return (DCMD_ERR); 224 } 225 226 if (dd_parent) { 227 if (dataset_name(dd_parent, buf)) 228 return (DCMD_ERR); 229 strcat(buf, "/"); 230 } 231 232 if (dd_myname[0]) 233 strcat(buf, dd_myname); 234 else 235 strcat(buf, "???"); 236 237 return (0); 238 } 239 240 static int 241 objset_name(uintptr_t addr, char *buf) 242 { 243 static int gotid; 244 static mdb_ctf_id_t osi_id, ds_id; 245 uintptr_t os_dsl_dataset; 246 char ds_snapname[MAXNAMELEN]; 247 uintptr_t ds_dir; 248 249 buf[0] = '\0'; 250 251 if (!gotid) { 252 if (mdb_ctf_lookup_by_name("struct objset_impl", 253 &osi_id) == -1) { 254 mdb_warn("couldn't find struct objset_impl"); 255 return (DCMD_ERR); 256 } 257 if (mdb_ctf_lookup_by_name("struct dsl_dataset", 258 &ds_id) == -1) { 259 mdb_warn("couldn't find struct dsl_dataset"); 260 return (DCMD_ERR); 261 } 262 263 gotid = TRUE; 264 } 265 266 if (GETMEMBID(addr, &osi_id, os_dsl_dataset, os_dsl_dataset)) 267 return (DCMD_ERR); 268 269 if (os_dsl_dataset == 0) { 270 strcat(buf, "mos"); 271 return (0); 272 } 273 274 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 275 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 276 return (DCMD_ERR); 277 } 278 279 if (ds_dir && dataset_name(ds_dir, buf)) 280 return (DCMD_ERR); 281 282 if (ds_snapname[0]) { 283 strcat(buf, "@"); 284 strcat(buf, ds_snapname); 285 } 286 return (0); 287 } 288 289 static void 290 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val, 291 const char *prefix) 292 { 293 const char *cp; 294 size_t len = strlen(prefix); 295 296 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) { 297 if (strncmp(cp, prefix, len) == 0) 298 cp += len; 299 (void) strncpy(out, cp, size); 300 } else { 301 mdb_snprintf(out, size, "? (%d)", val); 302 } 303 } 304 305 /* ARGSUSED */ 306 static int 307 zio_pipeline(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 308 { 309 mdb_ctf_id_t pipe_enum; 310 int i; 311 char stage[1024]; 312 313 if (mdb_ctf_lookup_by_name("enum zio_stage", &pipe_enum) == -1) { 314 mdb_warn("Could not find enum zio_stage"); 315 return (DCMD_ERR); 316 } 317 318 for (i = 0; i < 32; i++) { 319 if (addr & (1U << i)) { 320 enum_lookup(stage, sizeof (stage), pipe_enum, i, 321 "ZIO_STAGE_"); 322 mdb_printf(" %s\n", stage); 323 } 324 } 325 326 return (DCMD_OK); 327 } 328 329 /* ARGSUSED */ 330 static int 331 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 332 { 333 /* 334 * This table can be approximately generated by running: 335 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 336 */ 337 static const char *params[] = { 338 "arc_reduce_dnlc_percent", 339 "zfs_arc_max", 340 "zfs_arc_min", 341 "arc_shrink_shift", 342 "zfs_mdcomp_disable", 343 "zfs_prefetch_disable", 344 "zfetch_max_streams", 345 "zfetch_min_sec_reap", 346 "zfetch_block_cap", 347 "zfetch_array_rd_sz", 348 "zfs_default_bs", 349 "zfs_default_ibs", 350 "metaslab_aliquot", 351 "reference_tracking_enable", 352 "reference_history", 353 "zio_taskq_threads", 354 "spa_max_replication_override", 355 "spa_mode", 356 "zfs_flags", 357 "zfs_txg_synctime", 358 "zfs_txg_timeout", 359 "zfs_write_limit_min", 360 "zfs_write_limit_max", 361 "zfs_write_limit_shift", 362 "zfs_write_limit_override", 363 "zfs_no_write_throttle", 364 "zfs_vdev_cache_max", 365 "zfs_vdev_cache_size", 366 "zfs_vdev_cache_bshift", 367 "vdev_mirror_shift", 368 "zfs_vdev_max_pending", 369 "zfs_vdev_min_pending", 370 "zfs_scrub_limit", 371 "zfs_vdev_time_shift", 372 "zfs_vdev_ramp_rate", 373 "zfs_vdev_aggregation_limit", 374 "fzap_default_block_shift", 375 "zfs_immediate_write_sz", 376 "zfs_read_chunk_size", 377 "zil_disable", 378 "zfs_nocacheflush", 379 "metaslab_gang_bang", 380 "zio_injection_enabled", 381 "zvol_immediate_write_sz", 382 }; 383 int i; 384 385 for (i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 386 int sz; 387 uint64_t val64; 388 uint32_t *val32p = (uint32_t *)&val64; 389 390 sz = mdb_readvar(&val64, params[i]); 391 if (sz == 4) { 392 mdb_printf("%s = 0x%x\n", params[i], *val32p); 393 } else if (sz == 8) { 394 mdb_printf("%s = 0x%llx\n", params[i], val64); 395 } else { 396 mdb_warn("variable %s not found", params[i]); 397 } 398 } 399 400 return (DCMD_OK); 401 } 402 403 /* ARGSUSED */ 404 static int 405 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 406 { 407 blkptr_t bp; 408 dmu_object_type_info_t *doti; 409 zio_compress_info_t *zct; 410 zio_checksum_info_t *zci; 411 int i; 412 char buf[MAXPATHLEN]; 413 414 if (mdb_vread(&bp, sizeof (blkptr_t), addr) == -1) { 415 mdb_warn("failed to read blkptr_t"); 416 return (DCMD_ERR); 417 } 418 419 if (read_symbol("dmu_ot", (void **)&doti) != DCMD_OK) 420 return (DCMD_ERR); 421 for (i = 0; i < DMU_OT_NUMTYPES; i++) { 422 mdb_readstr(buf, sizeof (buf), (uintptr_t)doti[i].ot_name); 423 doti[i].ot_name = local_strdup(buf); 424 } 425 426 if (read_symbol("zio_checksum_table", (void **)&zci) != DCMD_OK) 427 return (DCMD_ERR); 428 for (i = 0; i < ZIO_CHECKSUM_FUNCTIONS; i++) { 429 mdb_readstr(buf, sizeof (buf), (uintptr_t)zci[i].ci_name); 430 zci[i].ci_name = local_strdup(buf); 431 } 432 433 if (read_symbol("zio_compress_table", (void **)&zct) != DCMD_OK) 434 return (DCMD_ERR); 435 for (i = 0; i < ZIO_COMPRESS_FUNCTIONS; i++) { 436 mdb_readstr(buf, sizeof (buf), (uintptr_t)zct[i].ci_name); 437 zct[i].ci_name = local_strdup(buf); 438 } 439 440 /* 441 * Super-ick warning: This code is also duplicated in 442 * cmd/zdb.c . Yeah, I hate code replication, too. 443 */ 444 for (i = 0; i < BP_GET_NDVAS(&bp); i++) { 445 dva_t *dva = &bp.blk_dva[i]; 446 447 mdb_printf("DVA[%d]: vdev_id %lld / %llx\n", i, 448 DVA_GET_VDEV(dva), DVA_GET_OFFSET(dva)); 449 mdb_printf("DVA[%d]: GANG: %-5s GRID: %04x\t" 450 "ASIZE: %llx\n", i, DVA_GET_GANG(dva) ? "TRUE" : "FALSE", 451 DVA_GET_GRID(dva), DVA_GET_ASIZE(dva)); 452 mdb_printf("DVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", i, 453 DVA_GET_VDEV(dva), DVA_GET_OFFSET(dva), BP_GET_PSIZE(&bp), 454 BP_SHOULD_BYTESWAP(&bp) ? "e" : "", 455 !DVA_GET_GANG(dva) && BP_GET_LEVEL(&bp) != 0 ? "i" : "", 456 DVA_GET_GANG(dva) ? "g" : "", 457 BP_GET_COMPRESS(&bp) != 0 ? "d" : ""); 458 } 459 mdb_printf("LSIZE: %-16llx\t\tPSIZE: %llx\n", 460 BP_GET_LSIZE(&bp), BP_GET_PSIZE(&bp)); 461 mdb_printf("ENDIAN: %6s\t\t\t\t\tTYPE: %s\n", 462 BP_GET_BYTEORDER(&bp) ? "LITTLE" : "BIG", 463 doti[BP_GET_TYPE(&bp)].ot_name); 464 mdb_printf("BIRTH: %-16llx LEVEL: %-2d\tFILL: %llx\n", 465 bp.blk_birth, BP_GET_LEVEL(&bp), bp.blk_fill); 466 mdb_printf("CKFUNC: %-16s\t\tCOMP: %s\n", 467 zci[BP_GET_CHECKSUM(&bp)].ci_name, 468 zct[BP_GET_COMPRESS(&bp)].ci_name); 469 mdb_printf("CKSUM: %llx:%llx:%llx:%llx\n", 470 bp.blk_cksum.zc_word[0], 471 bp.blk_cksum.zc_word[1], 472 bp.blk_cksum.zc_word[2], 473 bp.blk_cksum.zc_word[3]); 474 475 return (DCMD_OK); 476 } 477 478 /* ARGSUSED */ 479 static int 480 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 481 { 482 mdb_ctf_id_t id; 483 dmu_buf_t db; 484 uintptr_t objset; 485 uint8_t level; 486 uint64_t blkid; 487 uint64_t holds; 488 char objectname[32]; 489 char blkidname[32]; 490 char path[MAXNAMELEN]; 491 492 if (DCMD_HDRSPEC(flags)) { 493 mdb_printf(" addr object lvl blkid holds os\n"); 494 } 495 496 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &id) == -1) { 497 mdb_warn("couldn't find struct dmu_buf_impl_t"); 498 return (DCMD_ERR); 499 } 500 501 if (GETMEMBID(addr, &id, db_objset, objset) || 502 GETMEMBID(addr, &id, db, db) || 503 GETMEMBID(addr, &id, db_level, level) || 504 GETMEMBID(addr, &id, db_blkid, blkid)) { 505 return (WALK_ERR); 506 } 507 508 if (getrefcount(addr, &id, "db_holds", &holds)) { 509 return (WALK_ERR); 510 } 511 512 if (db.db_object == DMU_META_DNODE_OBJECT) 513 (void) strcpy(objectname, "mdn"); 514 else 515 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 516 (u_longlong_t)db.db_object); 517 518 if (blkid == DB_BONUS_BLKID) 519 (void) strcpy(blkidname, "bonus"); 520 else 521 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 522 (u_longlong_t)blkid); 523 524 if (objset_name(objset, path)) { 525 return (WALK_ERR); 526 } 527 528 mdb_printf("%p %8s %1u %9s %2llu %s\n", 529 addr, objectname, level, blkidname, holds, path); 530 531 return (DCMD_OK); 532 } 533 534 /* ARGSUSED */ 535 static int 536 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 537 { 538 #define HISTOSZ 32 539 uintptr_t dbp; 540 dmu_buf_impl_t db; 541 dbuf_hash_table_t ht; 542 uint64_t bucket, ndbufs; 543 uint64_t histo[HISTOSZ]; 544 uint64_t histo2[HISTOSZ]; 545 int i, maxidx; 546 547 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 548 mdb_warn("failed to read 'dbuf_hash_table'"); 549 return (DCMD_ERR); 550 } 551 552 for (i = 0; i < HISTOSZ; i++) { 553 histo[i] = 0; 554 histo2[i] = 0; 555 } 556 557 ndbufs = 0; 558 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 559 int len; 560 561 if (mdb_vread(&dbp, sizeof (void *), 562 (uintptr_t)(ht.hash_table+bucket)) == -1) { 563 mdb_warn("failed to read hash bucket %u at %p", 564 bucket, ht.hash_table+bucket); 565 return (DCMD_ERR); 566 } 567 568 len = 0; 569 while (dbp != 0) { 570 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 571 dbp) == -1) { 572 mdb_warn("failed to read dbuf at %p", dbp); 573 return (DCMD_ERR); 574 } 575 dbp = (uintptr_t)db.db_hash_next; 576 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 577 histo2[i]++; 578 len++; 579 ndbufs++; 580 } 581 582 if (len >= HISTOSZ) 583 len = HISTOSZ-1; 584 histo[len]++; 585 } 586 587 mdb_printf("hash table has %llu buckets, %llu dbufs " 588 "(avg %llu buckets/dbuf)\n", 589 ht.hash_table_mask+1, ndbufs, 590 (ht.hash_table_mask+1)/ndbufs); 591 592 mdb_printf("\n"); 593 maxidx = 0; 594 for (i = 0; i < HISTOSZ; i++) 595 if (histo[i] > 0) 596 maxidx = i; 597 mdb_printf("hash chain length number of buckets\n"); 598 for (i = 0; i <= maxidx; i++) 599 mdb_printf("%u %llu\n", i, histo[i]); 600 601 mdb_printf("\n"); 602 maxidx = 0; 603 for (i = 0; i < HISTOSZ; i++) 604 if (histo2[i] > 0) 605 maxidx = i; 606 mdb_printf("hash chain depth number of dbufs\n"); 607 for (i = 0; i <= maxidx; i++) 608 mdb_printf("%u or more %llu %llu%%\n", 609 i, histo2[i], histo2[i]*100/ndbufs); 610 611 612 return (DCMD_OK); 613 } 614 615 typedef struct dbufs_data { 616 mdb_ctf_id_t id; 617 uint64_t objset; 618 uint64_t object; 619 uint64_t level; 620 uint64_t blkid; 621 char *osname; 622 } dbufs_data_t; 623 624 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 625 626 /* ARGSUSED */ 627 static int 628 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 629 { 630 dbufs_data_t *data = arg; 631 uintptr_t objset; 632 dmu_buf_t db; 633 uint8_t level; 634 uint64_t blkid; 635 char osname[MAXNAMELEN]; 636 637 if (GETMEMBID(addr, &data->id, db_objset, objset) || 638 GETMEMBID(addr, &data->id, db, db) || 639 GETMEMBID(addr, &data->id, db_level, level) || 640 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 641 return (WALK_ERR); 642 } 643 644 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 645 (data->osname == NULL || (objset_name(objset, osname) == 0 && 646 strcmp(data->osname, osname) == 0)) && 647 (data->object == DBUFS_UNSET || data->object == db.db_object) && 648 (data->level == DBUFS_UNSET || data->level == level) && 649 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 650 mdb_printf("%#lr\n", addr); 651 } 652 return (WALK_NEXT); 653 } 654 655 /* ARGSUSED */ 656 static int 657 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 658 { 659 dbufs_data_t data; 660 char *object = NULL; 661 char *blkid = NULL; 662 663 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 664 data.osname = NULL; 665 666 if (mdb_getopts(argc, argv, 667 'O', MDB_OPT_UINT64, &data.objset, 668 'n', MDB_OPT_STR, &data.osname, 669 'o', MDB_OPT_STR, &object, 670 'l', MDB_OPT_UINT64, &data.level, 671 'b', MDB_OPT_STR, &blkid) != argc) { 672 return (DCMD_USAGE); 673 } 674 675 if (object) { 676 if (strcmp(object, "mdn") == 0) { 677 data.object = DMU_META_DNODE_OBJECT; 678 } else { 679 data.object = mdb_strtoull(object); 680 } 681 } 682 683 if (blkid) { 684 if (strcmp(blkid, "bonus") == 0) { 685 data.blkid = DB_BONUS_BLKID; 686 } else { 687 data.blkid = mdb_strtoull(blkid); 688 } 689 } 690 691 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &data.id) == -1) { 692 mdb_warn("couldn't find struct dmu_buf_impl_t"); 693 return (DCMD_ERR); 694 } 695 696 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 697 mdb_warn("can't walk dbufs"); 698 return (DCMD_ERR); 699 } 700 701 return (DCMD_OK); 702 } 703 704 typedef struct abuf_find_data { 705 dva_t dva; 706 mdb_ctf_id_t id; 707 } abuf_find_data_t; 708 709 /* ARGSUSED */ 710 static int 711 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 712 { 713 abuf_find_data_t *data = arg; 714 dva_t dva; 715 716 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 717 return (WALK_ERR); 718 } 719 720 if (dva.dva_word[0] == data->dva.dva_word[0] && 721 dva.dva_word[1] == data->dva.dva_word[1]) { 722 mdb_printf("%#lr\n", addr); 723 } 724 return (WALK_NEXT); 725 } 726 727 /* ARGSUSED */ 728 static int 729 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 730 { 731 abuf_find_data_t data; 732 GElf_Sym sym; 733 int i; 734 const char *syms[] = { 735 "ARC_mru", 736 "ARC_mru_ghost", 737 "ARC_mfu", 738 "ARC_mfu_ghost", 739 }; 740 741 if (argc != 2) 742 return (DCMD_USAGE); 743 744 for (i = 0; i < 2; i ++) { 745 switch (argv[i].a_type) { 746 case MDB_TYPE_STRING: 747 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 748 break; 749 case MDB_TYPE_IMMEDIATE: 750 data.dva.dva_word[i] = argv[i].a_un.a_val; 751 break; 752 default: 753 return (DCMD_USAGE); 754 } 755 } 756 757 if (mdb_ctf_lookup_by_name("struct arc_buf_hdr", &data.id) == -1) { 758 mdb_warn("couldn't find struct arc_buf_hdr"); 759 return (DCMD_ERR); 760 } 761 762 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 763 if (mdb_lookup_by_name(syms[i], &sym)) { 764 mdb_warn("can't find symbol %s", syms[i]); 765 return (DCMD_ERR); 766 } 767 768 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 769 mdb_warn("can't walk %s", syms[i]); 770 return (DCMD_ERR); 771 } 772 } 773 774 return (DCMD_OK); 775 } 776 777 /*ARGSUSED*/ 778 static int 779 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 780 { 781 kstat_named_t *stats; 782 GElf_Sym sym; 783 int nstats, i; 784 uint_t opt_a = FALSE; 785 uint_t opt_b = FALSE; 786 uint_t shift = 0; 787 const char *suffix; 788 789 static const char *bytestats[] = { 790 "p", "c", "c_min", "c_max", "size", NULL 791 }; 792 793 static const char *extras[] = { 794 "arc_no_grow", "arc_tempreserve", 795 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 796 NULL 797 }; 798 799 if (mdb_lookup_by_name("arc_stats", &sym) == -1) { 800 mdb_warn("failed to find 'arc_stats'"); 801 return (DCMD_ERR); 802 } 803 804 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 805 806 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 807 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 808 return (DCMD_ERR); 809 } 810 811 nstats = sym.st_size / sizeof (kstat_named_t); 812 813 /* NB: -a / opt_a are ignored for backwards compatability */ 814 if (mdb_getopts(argc, argv, 815 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 816 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 817 'k', MDB_OPT_SETBITS, 10, &shift, 818 'm', MDB_OPT_SETBITS, 20, &shift, 819 'g', MDB_OPT_SETBITS, 30, &shift, 820 NULL) != argc) 821 return (DCMD_USAGE); 822 823 if (!opt_b && !shift) 824 shift = 20; 825 826 switch (shift) { 827 case 0: 828 suffix = "B"; 829 break; 830 case 10: 831 suffix = "KB"; 832 break; 833 case 20: 834 suffix = "MB"; 835 break; 836 case 30: 837 suffix = "GB"; 838 break; 839 default: 840 suffix = "XX"; 841 } 842 843 for (i = 0; i < nstats; i++) { 844 int j; 845 boolean_t bytes = B_FALSE; 846 847 for (j = 0; bytestats[j]; j++) { 848 if (strcmp(stats[i].name, bytestats[j]) == 0) { 849 bytes = B_TRUE; 850 break; 851 } 852 } 853 854 if (bytes) { 855 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 856 stats[i].value.ui64 >> shift, suffix); 857 } else { 858 mdb_printf("%-25s = %9llu\n", stats[i].name, 859 stats[i].value.ui64); 860 } 861 } 862 863 for (i = 0; extras[i]; i++) { 864 uint64_t buf; 865 866 if (mdb_lookup_by_name(extras[i], &sym) == -1) { 867 mdb_warn("failed to find '%s'", extras[i]); 868 return (DCMD_ERR); 869 } 870 871 if (sym.st_size != sizeof (uint64_t) && 872 sym.st_size != sizeof (uint32_t)) { 873 mdb_warn("expected scalar for variable '%s'\n", 874 extras[i]); 875 return (DCMD_ERR); 876 } 877 878 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 879 mdb_warn("couldn't read '%s'", extras[i]); 880 return (DCMD_ERR); 881 } 882 883 mdb_printf("%-25s = ", extras[i]); 884 885 /* NB: all the 64-bit extras happen to be byte counts */ 886 if (sym.st_size == sizeof (uint64_t)) 887 mdb_printf("%9llu %s\n", buf >> shift, suffix); 888 889 if (sym.st_size == sizeof (uint32_t)) 890 mdb_printf("%9d\n", *((uint32_t *)&buf)); 891 } 892 return (DCMD_OK); 893 } 894 895 /* 896 * ::spa 897 * 898 * -c Print configuration information as well 899 * -v Print vdev state 900 * -e Print vdev error stats 901 * 902 * Print a summarized spa_t. When given no arguments, prints out a table of all 903 * active pools on the system. 904 */ 905 /* ARGSUSED */ 906 static int 907 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 908 { 909 spa_t spa; 910 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 911 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 912 const char *state; 913 int config = FALSE; 914 int vdevs = FALSE; 915 int errors = FALSE; 916 917 if (mdb_getopts(argc, argv, 918 'c', MDB_OPT_SETBITS, TRUE, &config, 919 'v', MDB_OPT_SETBITS, TRUE, &vdevs, 920 'e', MDB_OPT_SETBITS, TRUE, &errors, 921 NULL) != argc) 922 return (DCMD_USAGE); 923 924 if (!(flags & DCMD_ADDRSPEC)) { 925 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 926 mdb_warn("can't walk spa"); 927 return (DCMD_ERR); 928 } 929 930 return (DCMD_OK); 931 } 932 933 if (flags & DCMD_PIPE_OUT) { 934 mdb_printf("%#lr\n", addr); 935 return (DCMD_OK); 936 } 937 938 if (DCMD_HDRSPEC(flags)) 939 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 940 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 941 942 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 943 mdb_warn("failed to read spa_t at %p", addr); 944 return (DCMD_ERR); 945 } 946 947 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 948 state = "UNKNOWN"; 949 else 950 state = statetab[spa.spa_state]; 951 952 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 953 954 if (config) { 955 mdb_printf("\n"); 956 mdb_inc_indent(4); 957 if (mdb_call_dcmd("spa_config", addr, flags, 0, 958 NULL) != DCMD_OK) 959 return (DCMD_ERR); 960 mdb_dec_indent(4); 961 } 962 963 if (vdevs || errors) { 964 mdb_arg_t v; 965 966 v.a_type = MDB_TYPE_STRING; 967 v.a_un.a_str = "-e"; 968 969 mdb_printf("\n"); 970 mdb_inc_indent(4); 971 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0, 972 &v) != DCMD_OK) 973 return (DCMD_ERR); 974 mdb_dec_indent(4); 975 } 976 977 return (DCMD_OK); 978 } 979 980 /* 981 * ::spa_config 982 * 983 * Given a spa_t, print the configuration information stored in spa_config. 984 * Since it's just an nvlist, format it as an indented list of name=value pairs. 985 * We simply read the value of spa_config and pass off to ::nvlist. 986 */ 987 /* ARGSUSED */ 988 static int 989 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 990 { 991 spa_t spa; 992 993 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 994 return (DCMD_USAGE); 995 996 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 997 mdb_warn("failed to read spa_t at %p", addr); 998 return (DCMD_ERR); 999 } 1000 1001 if (spa.spa_config == NULL) { 1002 mdb_printf("(none)\n"); 1003 return (DCMD_OK); 1004 } 1005 1006 return (mdb_call_dcmd("nvlist", (uintptr_t)spa.spa_config, flags, 1007 0, NULL)); 1008 } 1009 1010 /* 1011 * ::vdev 1012 * 1013 * Print out a summarized vdev_t, in the following form: 1014 * 1015 * ADDR STATE AUX DESC 1016 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1017 * 1018 * If '-r' is specified, recursively visit all children. 1019 * 1020 * With '-e', the statistics associated with the vdev are printed as well. 1021 */ 1022 static int 1023 do_print_vdev(uintptr_t addr, int flags, int depth, int stats, 1024 int recursive) 1025 { 1026 vdev_t vdev; 1027 char desc[MAXNAMELEN]; 1028 int c, children; 1029 uintptr_t *child; 1030 const char *state, *aux; 1031 1032 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1033 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1034 return (DCMD_ERR); 1035 } 1036 1037 if (flags & DCMD_PIPE_OUT) { 1038 mdb_printf("%#lr", addr); 1039 } else { 1040 if (vdev.vdev_path != NULL) { 1041 if (mdb_readstr(desc, sizeof (desc), 1042 (uintptr_t)vdev.vdev_path) == -1) { 1043 mdb_warn("failed to read vdev_path at %p\n", 1044 vdev.vdev_path); 1045 return (DCMD_ERR); 1046 } 1047 } else if (vdev.vdev_ops != NULL) { 1048 vdev_ops_t ops; 1049 if (mdb_vread(&ops, sizeof (ops), 1050 (uintptr_t)vdev.vdev_ops) == -1) { 1051 mdb_warn("failed to read vdev_ops at %p\n", 1052 vdev.vdev_ops); 1053 return (DCMD_ERR); 1054 } 1055 (void) strcpy(desc, ops.vdev_op_type); 1056 } else { 1057 (void) strcpy(desc, "<unknown>"); 1058 } 1059 1060 if (depth == 0 && DCMD_HDRSPEC(flags)) 1061 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1062 "ADDR", "STATE", "AUX", 1063 sizeof (uintptr_t) == 4 ? 43 : 35, 1064 "DESCRIPTION"); 1065 1066 mdb_printf("%0?p ", addr); 1067 1068 switch (vdev.vdev_state) { 1069 case VDEV_STATE_CLOSED: 1070 state = "CLOSED"; 1071 break; 1072 case VDEV_STATE_OFFLINE: 1073 state = "OFFLINE"; 1074 break; 1075 case VDEV_STATE_CANT_OPEN: 1076 state = "CANT_OPEN"; 1077 break; 1078 case VDEV_STATE_DEGRADED: 1079 state = "DEGRADED"; 1080 break; 1081 case VDEV_STATE_HEALTHY: 1082 state = "HEALTHY"; 1083 break; 1084 case VDEV_STATE_REMOVED: 1085 state = "REMOVED"; 1086 break; 1087 case VDEV_STATE_FAULTED: 1088 state = "FAULTED"; 1089 break; 1090 default: 1091 state = "UNKNOWN"; 1092 break; 1093 } 1094 1095 switch (vdev.vdev_stat.vs_aux) { 1096 case VDEV_AUX_NONE: 1097 aux = "-"; 1098 break; 1099 case VDEV_AUX_OPEN_FAILED: 1100 aux = "OPEN_FAILED"; 1101 break; 1102 case VDEV_AUX_CORRUPT_DATA: 1103 aux = "CORRUPT_DATA"; 1104 break; 1105 case VDEV_AUX_NO_REPLICAS: 1106 aux = "NO_REPLICAS"; 1107 break; 1108 case VDEV_AUX_BAD_GUID_SUM: 1109 aux = "BAD_GUID_SUM"; 1110 break; 1111 case VDEV_AUX_TOO_SMALL: 1112 aux = "TOO_SMALL"; 1113 break; 1114 case VDEV_AUX_BAD_LABEL: 1115 aux = "BAD_LABEL"; 1116 break; 1117 case VDEV_AUX_VERSION_NEWER: 1118 aux = "VERS_NEWER"; 1119 break; 1120 case VDEV_AUX_VERSION_OLDER: 1121 aux = "VERS_OLDER"; 1122 break; 1123 case VDEV_AUX_SPARED: 1124 aux = "SPARED"; 1125 break; 1126 case VDEV_AUX_ERR_EXCEEDED: 1127 aux = "ERR_EXCEEDED"; 1128 break; 1129 case VDEV_AUX_IO_FAILURE: 1130 aux = "IO_FAILURE"; 1131 break; 1132 case VDEV_AUX_BAD_LOG: 1133 aux = "BAD_LOG"; 1134 break; 1135 default: 1136 aux = "UNKNOWN"; 1137 break; 1138 } 1139 1140 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1141 1142 if (stats) { 1143 vdev_stat_t *vs = &vdev.vdev_stat; 1144 int i; 1145 1146 mdb_inc_indent(4); 1147 mdb_printf("\n"); 1148 mdb_printf("%<u> %12s %12s %12s %12s " 1149 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1150 "IOCTL"); 1151 mdb_printf("OPS "); 1152 for (i = 1; i < ZIO_TYPES; i++) 1153 mdb_printf("%11#llx%s", vs->vs_ops[i], 1154 i == ZIO_TYPES - 1 ? "" : " "); 1155 mdb_printf("\n"); 1156 mdb_printf("BYTES "); 1157 for (i = 1; i < ZIO_TYPES; i++) 1158 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1159 i == ZIO_TYPES - 1 ? "" : " "); 1160 1161 1162 mdb_printf("\n"); 1163 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1164 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1165 mdb_printf("ECKSUM %10#llx\n", 1166 vs->vs_checksum_errors); 1167 mdb_dec_indent(4); 1168 } 1169 1170 if (stats) 1171 mdb_printf("\n"); 1172 } 1173 1174 children = vdev.vdev_children; 1175 1176 if (children == 0 || !recursive) 1177 return (DCMD_OK); 1178 1179 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1180 if (mdb_vread(child, children * sizeof (void *), 1181 (uintptr_t)vdev.vdev_child) == -1) { 1182 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1183 return (DCMD_ERR); 1184 } 1185 1186 for (c = 0; c < children; c++) { 1187 if (do_print_vdev(child[c], flags, depth + 2, stats, 1188 recursive)) 1189 return (DCMD_ERR); 1190 } 1191 1192 return (DCMD_OK); 1193 } 1194 1195 static int 1196 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1197 { 1198 int recursive = FALSE; 1199 int stats = FALSE; 1200 uint64_t depth = 0; 1201 1202 if (mdb_getopts(argc, argv, 1203 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1204 'e', MDB_OPT_SETBITS, TRUE, &stats, 1205 'd', MDB_OPT_UINT64, &depth, 1206 NULL) != argc) 1207 return (DCMD_USAGE); 1208 1209 if (!(flags & DCMD_ADDRSPEC)) { 1210 mdb_warn("no vdev_t address given\n"); 1211 return (DCMD_ERR); 1212 } 1213 1214 return (do_print_vdev(addr, flags, (int)depth, stats, recursive)); 1215 } 1216 1217 typedef struct metaslab_walk_data { 1218 uint64_t mw_numvdevs; 1219 uintptr_t *mw_vdevs; 1220 int mw_curvdev; 1221 uint64_t mw_nummss; 1222 uintptr_t *mw_mss; 1223 int mw_curms; 1224 } metaslab_walk_data_t; 1225 1226 static int 1227 metaslab_walk_step(mdb_walk_state_t *wsp) 1228 { 1229 metaslab_walk_data_t *mw = wsp->walk_data; 1230 metaslab_t ms; 1231 uintptr_t msp; 1232 1233 if (mw->mw_curvdev >= mw->mw_numvdevs) 1234 return (WALK_DONE); 1235 1236 if (mw->mw_mss == NULL) { 1237 uintptr_t mssp; 1238 uintptr_t vdevp; 1239 1240 ASSERT(mw->mw_curms == 0); 1241 ASSERT(mw->mw_nummss == 0); 1242 1243 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1244 if (GETMEMB(vdevp, struct vdev, vdev_ms, mssp) || 1245 GETMEMB(vdevp, struct vdev, vdev_ms_count, mw->mw_nummss)) { 1246 return (WALK_ERR); 1247 } 1248 1249 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1250 UM_SLEEP | UM_GC); 1251 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1252 mssp) == -1) { 1253 mdb_warn("failed to read vdev_ms at %p", mssp); 1254 return (WALK_ERR); 1255 } 1256 } 1257 1258 if (mw->mw_curms >= mw->mw_nummss) { 1259 mw->mw_mss = NULL; 1260 mw->mw_curms = 0; 1261 mw->mw_nummss = 0; 1262 mw->mw_curvdev++; 1263 return (WALK_NEXT); 1264 } 1265 1266 msp = mw->mw_mss[mw->mw_curms]; 1267 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1268 mdb_warn("failed to read metaslab_t at %p", msp); 1269 return (WALK_ERR); 1270 } 1271 1272 mw->mw_curms++; 1273 1274 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1275 } 1276 1277 /* ARGSUSED */ 1278 static int 1279 metaslab_walk_init(mdb_walk_state_t *wsp) 1280 { 1281 metaslab_walk_data_t *mw; 1282 uintptr_t root_vdevp; 1283 uintptr_t childp; 1284 1285 if (wsp->walk_addr == NULL) { 1286 mdb_warn("must supply address of spa_t\n"); 1287 return (WALK_ERR); 1288 } 1289 1290 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1291 1292 if (GETMEMB(wsp->walk_addr, struct spa, spa_root_vdev, root_vdevp) || 1293 GETMEMB(root_vdevp, struct vdev, vdev_children, mw->mw_numvdevs) || 1294 GETMEMB(root_vdevp, struct vdev, vdev_child, childp)) { 1295 return (DCMD_ERR); 1296 } 1297 1298 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1299 UM_SLEEP | UM_GC); 1300 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1301 childp) == -1) { 1302 mdb_warn("failed to read root vdev children at %p", childp); 1303 return (DCMD_ERR); 1304 } 1305 1306 wsp->walk_data = mw; 1307 1308 return (WALK_NEXT); 1309 } 1310 1311 typedef struct mdb_spa { 1312 uintptr_t spa_dsl_pool; 1313 uintptr_t spa_root_vdev; 1314 } mdb_spa_t; 1315 1316 typedef struct mdb_dsl_dir { 1317 uintptr_t dd_phys; 1318 int64_t dd_space_towrite[TXG_SIZE]; 1319 } mdb_dsl_dir_t; 1320 1321 typedef struct mdb_dsl_dir_phys { 1322 uint64_t dd_used_bytes; 1323 uint64_t dd_compressed_bytes; 1324 uint64_t dd_uncompressed_bytes; 1325 } mdb_dsl_dir_phys_t; 1326 1327 typedef struct mdb_vdev { 1328 uintptr_t vdev_parent; 1329 uintptr_t vdev_ms; 1330 uint64_t vdev_ms_count; 1331 vdev_stat_t vdev_stat; 1332 } mdb_vdev_t; 1333 1334 typedef struct mdb_metaslab { 1335 space_map_t ms_allocmap[TXG_SIZE]; 1336 space_map_t ms_freemap[TXG_SIZE]; 1337 space_map_t ms_map; 1338 space_map_obj_t ms_smo; 1339 space_map_obj_t ms_smo_syncing; 1340 } mdb_metaslab_t; 1341 1342 typedef struct space_data { 1343 uint64_t ms_allocmap[TXG_SIZE]; 1344 uint64_t ms_freemap[TXG_SIZE]; 1345 uint64_t ms_map; 1346 uint64_t avail; 1347 uint64_t nowavail; 1348 } space_data_t; 1349 1350 /* ARGSUSED */ 1351 static int 1352 space_cb(uintptr_t addr, const void *unknown, void *arg) 1353 { 1354 space_data_t *sd = arg; 1355 mdb_metaslab_t ms; 1356 1357 if (GETMEMB(addr, struct metaslab, ms_allocmap, ms.ms_allocmap) || 1358 GETMEMB(addr, struct metaslab, ms_freemap, ms.ms_freemap) || 1359 GETMEMB(addr, struct metaslab, ms_map, ms.ms_map) || 1360 GETMEMB(addr, struct metaslab, ms_smo, ms.ms_smo) || 1361 GETMEMB(addr, struct metaslab, ms_smo_syncing, ms.ms_smo_syncing)) { 1362 return (WALK_ERR); 1363 } 1364 1365 sd->ms_allocmap[0] += ms.ms_allocmap[0].sm_space; 1366 sd->ms_allocmap[1] += ms.ms_allocmap[1].sm_space; 1367 sd->ms_allocmap[2] += ms.ms_allocmap[2].sm_space; 1368 sd->ms_allocmap[3] += ms.ms_allocmap[3].sm_space; 1369 sd->ms_freemap[0] += ms.ms_freemap[0].sm_space; 1370 sd->ms_freemap[1] += ms.ms_freemap[1].sm_space; 1371 sd->ms_freemap[2] += ms.ms_freemap[2].sm_space; 1372 sd->ms_freemap[3] += ms.ms_freemap[3].sm_space; 1373 sd->ms_map += ms.ms_map.sm_space; 1374 sd->avail += ms.ms_map.sm_size - ms.ms_smo.smo_alloc; 1375 sd->nowavail += ms.ms_map.sm_size - ms.ms_smo_syncing.smo_alloc; 1376 1377 return (WALK_NEXT); 1378 } 1379 1380 /* 1381 * ::spa_space [-b] 1382 * 1383 * Given a spa_t, print out it's on-disk space usage and in-core 1384 * estimates of future usage. If -b is given, print space in bytes. 1385 * Otherwise print in megabytes. 1386 */ 1387 /* ARGSUSED */ 1388 static int 1389 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1390 { 1391 mdb_spa_t spa; 1392 uintptr_t dp_root_dir; 1393 mdb_dsl_dir_t dd; 1394 mdb_dsl_dir_phys_t dsp; 1395 uint64_t children; 1396 uintptr_t childaddr; 1397 space_data_t sd; 1398 int shift = 20; 1399 char *suffix = "M"; 1400 int bits = FALSE; 1401 1402 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bits, NULL) != 1403 argc) 1404 return (DCMD_USAGE); 1405 if (!(flags & DCMD_ADDRSPEC)) 1406 return (DCMD_USAGE); 1407 1408 if (bits) { 1409 shift = 0; 1410 suffix = ""; 1411 } 1412 1413 if (GETMEMB(addr, struct spa, spa_dsl_pool, spa.spa_dsl_pool) || 1414 GETMEMB(addr, struct spa, spa_root_vdev, spa.spa_root_vdev) || 1415 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_children, children) || 1416 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_child, childaddr) || 1417 GETMEMB(spa.spa_dsl_pool, struct dsl_pool, 1418 dp_root_dir, dp_root_dir) || 1419 GETMEMB(dp_root_dir, struct dsl_dir, dd_phys, dd.dd_phys) || 1420 GETMEMB(dp_root_dir, struct dsl_dir, 1421 dd_space_towrite, dd.dd_space_towrite) || 1422 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1423 dd_used_bytes, dsp.dd_used_bytes) || 1424 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1425 dd_compressed_bytes, dsp.dd_compressed_bytes) || 1426 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1427 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) { 1428 return (DCMD_ERR); 1429 } 1430 1431 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1432 dd.dd_space_towrite[0] >> shift, suffix, 1433 dd.dd_space_towrite[1] >> shift, suffix, 1434 dd.dd_space_towrite[2] >> shift, suffix, 1435 dd.dd_space_towrite[3] >> shift, suffix); 1436 1437 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1438 dsp.dd_used_bytes >> shift, suffix); 1439 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1440 dsp.dd_compressed_bytes >> shift, suffix); 1441 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1442 dsp.dd_uncompressed_bytes >> shift, suffix); 1443 1444 bzero(&sd, sizeof (sd)); 1445 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1446 mdb_warn("can't walk metaslabs"); 1447 return (DCMD_ERR); 1448 } 1449 1450 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1451 sd.ms_allocmap[0] >> shift, suffix, 1452 sd.ms_allocmap[1] >> shift, suffix, 1453 sd.ms_allocmap[2] >> shift, suffix, 1454 sd.ms_allocmap[3] >> shift, suffix); 1455 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1456 sd.ms_freemap[0] >> shift, suffix, 1457 sd.ms_freemap[1] >> shift, suffix, 1458 sd.ms_freemap[2] >> shift, suffix, 1459 sd.ms_freemap[3] >> shift, suffix); 1460 mdb_printf("ms_map = %llu%s\n", sd.ms_map >> shift, suffix); 1461 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1462 mdb_printf("current syncing avail = %llu%s\n", 1463 sd.nowavail >> shift, suffix); 1464 1465 return (DCMD_OK); 1466 } 1467 1468 /* 1469 * ::spa_verify 1470 * 1471 * Given a spa_t, verify that that the pool is self-consistent. 1472 * Currently, it only checks to make sure that the vdev tree exists. 1473 */ 1474 /* ARGSUSED */ 1475 static int 1476 spa_verify(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1477 { 1478 spa_t spa; 1479 1480 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1481 return (DCMD_USAGE); 1482 1483 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1484 mdb_warn("failed to read spa_t at %p", addr); 1485 return (DCMD_ERR); 1486 } 1487 1488 if (spa.spa_root_vdev == NULL) { 1489 mdb_printf("no vdev tree present\n"); 1490 return (DCMD_OK); 1491 } 1492 1493 return (DCMD_OK); 1494 } 1495 1496 /* 1497 * ::spa_vdevs 1498 * 1499 * -e Include error stats 1500 * 1501 * Print out a summarized list of vdevs for the given spa_t. 1502 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 1503 * iterating over the cache devices. 1504 */ 1505 /* ARGSUSED */ 1506 static int 1507 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1508 { 1509 spa_t spa; 1510 mdb_arg_t v[3]; 1511 int errors = FALSE; 1512 int ret, i; 1513 uintptr_t *aux; 1514 size_t len; 1515 1516 if (mdb_getopts(argc, argv, 1517 'e', MDB_OPT_SETBITS, TRUE, &errors, 1518 NULL) != argc) 1519 return (DCMD_USAGE); 1520 1521 if (!(flags & DCMD_ADDRSPEC)) 1522 return (DCMD_USAGE); 1523 1524 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1525 mdb_warn("failed to read spa_t at %p", addr); 1526 return (DCMD_ERR); 1527 } 1528 1529 /* 1530 * Unitialized spa_t structures can have a NULL root vdev. 1531 */ 1532 if (spa.spa_root_vdev == NULL) { 1533 mdb_printf("no associated vdevs\n"); 1534 return (DCMD_OK); 1535 } 1536 1537 v[0].a_type = MDB_TYPE_STRING; 1538 v[0].a_un.a_str = errors ? "-re" : "-r"; 1539 1540 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1541 flags, 1, v); 1542 if (ret != DCMD_OK) 1543 return (ret); 1544 1545 /* 1546 * Iterate over cache devices and print those out as well. This is a 1547 * little annoying because we don't have a root vdev to pass to ::vdev. 1548 * Instead, we print a single 'cache' line and then call it for each 1549 * child vdev. 1550 */ 1551 if (spa.spa_l2cache.sav_count != 0) { 1552 v[1].a_type = MDB_TYPE_STRING; 1553 v[1].a_un.a_str = "-d"; 1554 v[2].a_type = MDB_TYPE_IMMEDIATE; 1555 v[2].a_un.a_val = 2; 1556 1557 len = spa.spa_l2cache.sav_count * sizeof (uintptr_t); 1558 aux = mdb_alloc(len, UM_SLEEP); 1559 if (mdb_vread(aux, len, 1560 (uintptr_t)spa.spa_l2cache.sav_vdevs) == -1) { 1561 mdb_free(aux, len); 1562 mdb_warn("failed to read l2cache vdevs at %p", 1563 spa.spa_l2cache.sav_vdevs); 1564 return (DCMD_ERR); 1565 } 1566 1567 mdb_printf("%-?s %-9s %-12s cache\n", "-", "-", "-"); 1568 1569 for (i = 0; i < spa.spa_l2cache.sav_count; i++) { 1570 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 1571 if (ret != DCMD_OK) { 1572 mdb_free(aux, len); 1573 return (ret); 1574 } 1575 } 1576 1577 mdb_free(aux, len); 1578 } 1579 1580 return (DCMD_OK); 1581 } 1582 1583 /* 1584 * ::zio 1585 * 1586 * Print a summary of zio_t and all its children. This is intended to display a 1587 * zio tree, and hence we only pick the most important pieces of information for 1588 * the main summary. More detailed information can always be found by doing a 1589 * '::print zio' on the underlying zio_t. The columns we display are: 1590 * 1591 * ADDRESS TYPE STAGE WAITER 1592 * 1593 * The 'address' column is indented by one space for each depth level as we 1594 * descend down the tree. 1595 */ 1596 1597 #define ZIO_MAXDEPTH 16 1598 1599 static int 1600 zio_print_cb(uintptr_t addr, const void *data, void *priv) 1601 { 1602 const zio_t *zio = data; 1603 uintptr_t depth = (uintptr_t)priv; 1604 mdb_ctf_id_t type_enum, stage_enum; 1605 const char *type, *stage; 1606 int maxdepth; 1607 1608 maxdepth = sizeof (uintptr_t) * 2 + ZIO_MAXDEPTH; 1609 if (depth > ZIO_MAXDEPTH) 1610 depth = ZIO_MAXDEPTH; 1611 1612 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 1613 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 1614 mdb_warn("failed to lookup zio enums"); 1615 return (WALK_ERR); 1616 } 1617 1618 if ((type = mdb_ctf_enum_name(type_enum, zio->io_type)) != NULL) 1619 type += sizeof ("ZIO_TYPE_") - 1; 1620 else 1621 type = "?"; 1622 1623 if ((stage = mdb_ctf_enum_name(stage_enum, zio->io_stage)) != NULL) 1624 stage += sizeof ("ZIO_STAGE_") - 1; 1625 else 1626 stage = "?"; 1627 1628 1629 mdb_printf("%*s%-*p %-5s %-22s ", 1630 depth, "", maxdepth - depth, addr, type, stage); 1631 if (zio->io_waiter) 1632 mdb_printf("%?p\n", zio->io_waiter); 1633 else 1634 mdb_printf("-\n"); 1635 1636 if (mdb_pwalk("zio_child", zio_print_cb, (void *)(depth + 1), 1637 addr) != 0) { 1638 mdb_warn("failed to walk zio_t children at %p\n", addr); 1639 return (WALK_ERR); 1640 } 1641 1642 return (WALK_NEXT); 1643 } 1644 1645 /*ARGSUSED*/ 1646 static int 1647 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1648 { 1649 zio_t zio; 1650 int maxdepth; 1651 1652 maxdepth = sizeof (uintptr_t) * 2 + ZIO_MAXDEPTH; 1653 1654 if (!(flags & DCMD_ADDRSPEC)) 1655 return (DCMD_USAGE); 1656 1657 if (mdb_vread(&zio, sizeof (zio_t), addr) == -1) { 1658 mdb_warn("failed to read zio_t at %p", addr); 1659 return (DCMD_ERR); 1660 } 1661 1662 if (DCMD_HDRSPEC(flags)) 1663 mdb_printf("%<u>%-*s %-5s %-22s %-?s%</u>\n", maxdepth, 1664 "ADDRESS", "TYPE", "STAGE", "WAITER"); 1665 1666 if (zio_print_cb(addr, &zio, NULL) != WALK_NEXT) 1667 return (DCMD_ERR); 1668 1669 return (DCMD_OK); 1670 } 1671 1672 /* 1673 * [addr]::zio_state 1674 * 1675 * Print a summary of all zio_t structures on the system, or for a particular 1676 * pool. This is equivalent to '::walk zio_root | ::zio'. 1677 */ 1678 /*ARGSUSED*/ 1679 static int 1680 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1681 { 1682 /* 1683 * MDB will remember the last address of the pipeline, so if we don't 1684 * zero this we'll end up trying to walk zio structures for a 1685 * non-existent spa_t. 1686 */ 1687 if (!(flags & DCMD_ADDRSPEC)) 1688 addr = 0; 1689 1690 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 1691 } 1692 1693 typedef struct txg_list_walk_data { 1694 uintptr_t lw_head[TXG_SIZE]; 1695 int lw_txgoff; 1696 int lw_maxoff; 1697 size_t lw_offset; 1698 void *lw_obj; 1699 } txg_list_walk_data_t; 1700 1701 static int 1702 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 1703 { 1704 txg_list_walk_data_t *lwd; 1705 txg_list_t list; 1706 int i; 1707 1708 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 1709 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 1710 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 1711 return (WALK_ERR); 1712 } 1713 1714 for (i = 0; i < TXG_SIZE; i++) 1715 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 1716 lwd->lw_offset = list.tl_offset; 1717 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 1718 UM_SLEEP | UM_GC); 1719 lwd->lw_txgoff = txg; 1720 lwd->lw_maxoff = maxoff; 1721 1722 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1723 wsp->walk_data = lwd; 1724 1725 return (WALK_NEXT); 1726 } 1727 1728 static int 1729 txg_list_walk_init(mdb_walk_state_t *wsp) 1730 { 1731 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 1732 } 1733 1734 static int 1735 txg_list0_walk_init(mdb_walk_state_t *wsp) 1736 { 1737 return (txg_list_walk_init_common(wsp, 0, 0)); 1738 } 1739 1740 static int 1741 txg_list1_walk_init(mdb_walk_state_t *wsp) 1742 { 1743 return (txg_list_walk_init_common(wsp, 1, 1)); 1744 } 1745 1746 static int 1747 txg_list2_walk_init(mdb_walk_state_t *wsp) 1748 { 1749 return (txg_list_walk_init_common(wsp, 2, 2)); 1750 } 1751 1752 static int 1753 txg_list3_walk_init(mdb_walk_state_t *wsp) 1754 { 1755 return (txg_list_walk_init_common(wsp, 3, 3)); 1756 } 1757 1758 static int 1759 txg_list_walk_step(mdb_walk_state_t *wsp) 1760 { 1761 txg_list_walk_data_t *lwd = wsp->walk_data; 1762 uintptr_t addr; 1763 txg_node_t *node; 1764 int status; 1765 1766 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 1767 lwd->lw_txgoff++; 1768 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1769 } 1770 1771 if (wsp->walk_addr == NULL) 1772 return (WALK_DONE); 1773 1774 addr = wsp->walk_addr - lwd->lw_offset; 1775 1776 if (mdb_vread(lwd->lw_obj, 1777 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 1778 mdb_warn("failed to read list element at %#lx", addr); 1779 return (WALK_ERR); 1780 } 1781 1782 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 1783 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 1784 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 1785 1786 return (status); 1787 } 1788 1789 /* 1790 * ::walk spa 1791 * 1792 * Walk all named spa_t structures in the namespace. This is nothing more than 1793 * a layered avl walk. 1794 */ 1795 static int 1796 spa_walk_init(mdb_walk_state_t *wsp) 1797 { 1798 GElf_Sym sym; 1799 1800 if (wsp->walk_addr != NULL) { 1801 mdb_warn("spa walk only supports global walks\n"); 1802 return (WALK_ERR); 1803 } 1804 1805 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 1806 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 1807 return (WALK_ERR); 1808 } 1809 1810 wsp->walk_addr = (uintptr_t)sym.st_value; 1811 1812 if (mdb_layered_walk("avl", wsp) == -1) { 1813 mdb_warn("failed to walk 'avl'\n"); 1814 return (WALK_ERR); 1815 } 1816 1817 return (WALK_NEXT); 1818 } 1819 1820 static int 1821 spa_walk_step(mdb_walk_state_t *wsp) 1822 { 1823 spa_t spa; 1824 1825 if (mdb_vread(&spa, sizeof (spa), wsp->walk_addr) == -1) { 1826 mdb_warn("failed to read spa_t at %p", wsp->walk_addr); 1827 return (WALK_ERR); 1828 } 1829 1830 return (wsp->walk_callback(wsp->walk_addr, &spa, wsp->walk_cbdata)); 1831 } 1832 1833 /* 1834 * [addr]::walk zio 1835 * 1836 * Walk all active zio_t structures on the system. This is simply a layered 1837 * walk on top of ::walk zio_cache, with the optional ability to limit the 1838 * structures to a particular pool. 1839 */ 1840 static int 1841 zio_walk_init(mdb_walk_state_t *wsp) 1842 { 1843 wsp->walk_data = (void *)wsp->walk_addr; 1844 1845 if (mdb_layered_walk("zio_cache", wsp) == -1) { 1846 mdb_warn("failed to walk 'zio_cache'\n"); 1847 return (WALK_ERR); 1848 } 1849 1850 return (WALK_NEXT); 1851 } 1852 1853 static int 1854 zio_walk_step(mdb_walk_state_t *wsp) 1855 { 1856 zio_t zio; 1857 1858 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1859 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1860 return (WALK_ERR); 1861 } 1862 1863 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 1864 return (WALK_NEXT); 1865 1866 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 1867 } 1868 1869 /* 1870 * ::walk zio_child 1871 * 1872 * Walk the children of a zio_t structure. 1873 */ 1874 static int 1875 zio_child_walk_init(mdb_walk_state_t *wsp) 1876 { 1877 zio_t zio; 1878 1879 if (wsp->walk_addr == 0) { 1880 mdb_warn("::walk zio_child doesn't support global walks\n"); 1881 return (WALK_ERR); 1882 } 1883 1884 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1885 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1886 return (WALK_ERR); 1887 } 1888 1889 wsp->walk_addr = (uintptr_t)zio.io_child; 1890 return (WALK_NEXT); 1891 } 1892 1893 static int 1894 zio_sibling_walk_step(mdb_walk_state_t *wsp) 1895 { 1896 zio_t zio; 1897 int status; 1898 1899 if (wsp->walk_addr == NULL) 1900 return (WALK_DONE); 1901 1902 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1903 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1904 return (WALK_ERR); 1905 } 1906 1907 status = wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata); 1908 1909 wsp->walk_addr = (uintptr_t)zio.io_sibling_next; 1910 return (status); 1911 } 1912 1913 /* 1914 * [addr]::walk zio_root 1915 * 1916 * Walk only root zio_t structures, optionally for a particular spa_t. 1917 */ 1918 static int 1919 zio_walk_root_step(mdb_walk_state_t *wsp) 1920 { 1921 zio_t zio; 1922 1923 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 1924 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 1925 return (WALK_ERR); 1926 } 1927 1928 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 1929 return (WALK_NEXT); 1930 1931 if ((uintptr_t)zio.io_parent != NULL) 1932 return (WALK_NEXT); 1933 1934 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 1935 } 1936 1937 #define NICENUM_BUFLEN 6 1938 1939 static int 1940 snprintfrac(char *buf, int len, 1941 uint64_t numerator, uint64_t denom, int frac_digits) 1942 { 1943 int mul = 1; 1944 int whole, frac, i; 1945 1946 for (i = frac_digits; i; i--) 1947 mul *= 10; 1948 whole = numerator / denom; 1949 frac = mul * numerator / denom - mul * whole; 1950 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); 1951 } 1952 1953 static void 1954 mdb_nicenum(uint64_t num, char *buf) 1955 { 1956 uint64_t n = num; 1957 int index = 0; 1958 char *u; 1959 1960 while (n >= 1024) { 1961 n = (n + (1024 / 2)) / 1024; /* Round up or down */ 1962 index++; 1963 } 1964 1965 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; 1966 1967 if (index == 0) { 1968 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", 1969 (u_longlong_t)n); 1970 } else if (n < 10 && (num & (num - 1)) != 0) { 1971 (void) snprintfrac(buf, NICENUM_BUFLEN, 1972 num, 1ULL << 10 * index, 2); 1973 strcat(buf, u); 1974 } else if (n < 100 && (num & (num - 1)) != 0) { 1975 (void) snprintfrac(buf, NICENUM_BUFLEN, 1976 num, 1ULL << 10 * index, 1); 1977 strcat(buf, u); 1978 } else { 1979 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", 1980 (u_longlong_t)n, u); 1981 } 1982 } 1983 1984 /* 1985 * ::zfs_blkstats 1986 * 1987 * -v print verbose per-level information 1988 * 1989 */ 1990 static int 1991 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1992 { 1993 boolean_t verbose = B_FALSE; 1994 zfs_all_blkstats_t stats; 1995 dmu_object_type_t t; 1996 zfs_blkstat_t *tzb; 1997 uint64_t ditto; 1998 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; 1999 /* +10 in case it grew */ 2000 2001 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { 2002 mdb_warn("failed to read 'dmu_ot'"); 2003 return (DCMD_ERR); 2004 } 2005 2006 if (mdb_getopts(argc, argv, 2007 'v', MDB_OPT_SETBITS, TRUE, &verbose, 2008 NULL) != argc) 2009 return (DCMD_USAGE); 2010 2011 if (!(flags & DCMD_ADDRSPEC)) 2012 return (DCMD_USAGE); 2013 2014 if (GETMEMB(addr, struct spa, spa_dsl_pool, addr) || 2015 GETMEMB(addr, struct dsl_pool, dp_blkstats, addr) || 2016 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 2017 mdb_warn("failed to read data at %p;", addr); 2018 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 2019 return (DCMD_ERR); 2020 } 2021 2022 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_NUMTYPES]; 2023 if (tzb->zb_gangs != 0) { 2024 mdb_printf("Ganged blocks: %llu\n", 2025 (longlong_t)tzb->zb_gangs); 2026 } 2027 2028 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 2029 tzb->zb_ditto_3_of_3_samevdev; 2030 if (ditto != 0) { 2031 mdb_printf("Dittoed blocks on same vdev: %llu\n", 2032 (longlong_t)ditto); 2033 } 2034 2035 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 2036 "\t avg\t comp\t%%Total\tType\n"); 2037 2038 for (t = 0; t <= DMU_OT_NUMTYPES; t++) { 2039 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; 2040 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; 2041 char avg[NICENUM_BUFLEN]; 2042 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; 2043 char typename[64]; 2044 int l; 2045 2046 2047 if (t == DMU_OT_DEFERRED) 2048 strcpy(typename, "deferred free"); 2049 else if (t == DMU_OT_TOTAL) 2050 strcpy(typename, "Total"); 2051 else if (mdb_readstr(typename, sizeof (typename), 2052 (uintptr_t)dmu_ot[t].ot_name) == -1) { 2053 mdb_warn("failed to read type name"); 2054 return (DCMD_ERR); 2055 } 2056 2057 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 2058 continue; 2059 2060 for (l = -1; l < DN_MAX_LEVELS; l++) { 2061 int level = (l == -1 ? DN_MAX_LEVELS : l); 2062 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 2063 2064 if (zb->zb_asize == 0) 2065 continue; 2066 2067 /* 2068 * Don't print each level unless requested. 2069 */ 2070 if (!verbose && level != DN_MAX_LEVELS) 2071 continue; 2072 2073 /* 2074 * If all the space is level 0, don't print the 2075 * level 0 separately. 2076 */ 2077 if (level == 0 && zb->zb_asize == 2078 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 2079 continue; 2080 2081 mdb_nicenum(zb->zb_count, csize); 2082 mdb_nicenum(zb->zb_lsize, lsize); 2083 mdb_nicenum(zb->zb_psize, psize); 2084 mdb_nicenum(zb->zb_asize, asize); 2085 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 2086 (void) snprintfrac(comp, NICENUM_BUFLEN, 2087 zb->zb_lsize, zb->zb_psize, 2); 2088 (void) snprintfrac(pct, NICENUM_BUFLEN, 2089 100 * zb->zb_asize, tzb->zb_asize, 2); 2090 2091 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 2092 "\t%5s\t%6s\t", 2093 csize, lsize, psize, asize, avg, comp, pct); 2094 2095 if (level == DN_MAX_LEVELS) 2096 mdb_printf("%s\n", typename); 2097 else 2098 mdb_printf(" L%d %s\n", 2099 level, typename); 2100 } 2101 } 2102 2103 return (DCMD_OK); 2104 } 2105 2106 /* 2107 * MDB module linkage information: 2108 * 2109 * We declare a list of structures describing our dcmds, and a function 2110 * named _mdb_init to return a pointer to our module information. 2111 */ 2112 2113 static const mdb_dcmd_t dcmds[] = { 2114 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 2115 { "blkptr", ":", "print blkptr_t", blkptr }, 2116 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 2117 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 2118 { "dbufs", 2119 "\t[-O objset_impl_t*] [-n objset_name | \"mos\"] " 2120 "[-o object | \"mdn\"] \n" 2121 "\t[-l level] [-b blkid | \"bonus\"]", 2122 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 2123 { "abuf_find", "dva_word[0] dva_word[1]", 2124 "find arc_buf_hdr_t of a specified DVA", 2125 abuf_find }, 2126 { "spa", "?[-cv]", "spa_t summary", spa_print }, 2127 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 2128 { "spa_verify", ":", "verify spa_t consistency", spa_verify }, 2129 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 2130 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs }, 2131 { "vdev", ":[-re]\n" 2132 "\t-r display recursively\n" 2133 "\t-e print statistics\n", 2134 "vdev_t summary", vdev_print }, 2135 { "zio", ":", "zio_t summary", zio_print }, 2136 { "zio_state", "?", "print out all zio_t structures on system or " 2137 "for a particular pool", zio_state }, 2138 { "zio_pipeline", ":", "decode a zio pipeline", zio_pipeline }, 2139 { "zfs_blkstats", ":[-v]", 2140 "given a spa_t, print block type stats from last scrub", 2141 zfs_blkstats }, 2142 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 2143 { NULL } 2144 }; 2145 2146 static const mdb_walker_t walkers[] = { 2147 /* 2148 * In userland, there is no generic provider of list_t walkers, so we 2149 * need to add it. 2150 */ 2151 #ifndef _KERNEL 2152 { LIST_WALK_NAME, LIST_WALK_DESC, 2153 list_walk_init, list_walk_step, list_walk_fini }, 2154 #endif 2155 { "zms_freelist", "walk ZFS metaslab freelist", 2156 freelist_walk_init, freelist_walk_step, NULL }, 2157 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 2158 txg_list_walk_init, txg_list_walk_step, NULL }, 2159 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 2160 txg_list0_walk_init, txg_list_walk_step, NULL }, 2161 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 2162 txg_list1_walk_init, txg_list_walk_step, NULL }, 2163 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 2164 txg_list2_walk_init, txg_list_walk_step, NULL }, 2165 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 2166 txg_list3_walk_init, txg_list_walk_step, NULL }, 2167 { "zio", "walk all zio structures, optionally for a particular spa_t", 2168 zio_walk_init, zio_walk_step, NULL }, 2169 { "zio_child", "walk children of a zio_t structure", 2170 zio_child_walk_init, zio_sibling_walk_step, NULL }, 2171 { "zio_root", "walk all root zio_t structures, optionally for a " 2172 "particular spa_t", 2173 zio_walk_init, zio_walk_root_step, NULL }, 2174 { "spa", "walk all spa_t entries in the namespace", 2175 spa_walk_init, spa_walk_step, NULL }, 2176 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 2177 metaslab_walk_init, metaslab_walk_step, NULL }, 2178 { NULL } 2179 }; 2180 2181 static const mdb_modinfo_t modinfo = { 2182 MDB_API_VERSION, dcmds, walkers 2183 }; 2184 2185 const mdb_modinfo_t * 2186 _mdb_init(void) 2187 { 2188 return (&modinfo); 2189 } 2190