1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 * Copyright (c) 2012 by Delphix. All rights reserved. 25 */ 26 27 /* Portions Copyright 2010 Robert Milkowski */ 28 29 #include <mdb/mdb_ctf.h> 30 #include <sys/zfs_context.h> 31 #include <sys/mdb_modapi.h> 32 #include <sys/dbuf.h> 33 #include <sys/dmu_objset.h> 34 #include <sys/dsl_dir.h> 35 #include <sys/dsl_pool.h> 36 #include <sys/metaslab_impl.h> 37 #include <sys/space_map.h> 38 #include <sys/list.h> 39 #include <sys/spa_impl.h> 40 #include <sys/vdev_impl.h> 41 #include <sys/zap_leaf.h> 42 #include <sys/zap_impl.h> 43 #include <ctype.h> 44 #include <sys/zfs_acl.h> 45 #include <sys/sa_impl.h> 46 47 #ifdef _KERNEL 48 #define ZFS_OBJ_NAME "zfs" 49 #else 50 #define ZFS_OBJ_NAME "libzpool.so.1" 51 #endif 52 53 #ifndef _KERNEL 54 int aok; 55 #endif 56 57 static int 58 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 59 const char *member, int len, void *buf) 60 { 61 mdb_ctf_id_t id; 62 ulong_t off; 63 char name[64]; 64 65 if (idp == NULL) { 66 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 67 mdb_warn("couldn't find type %s", type); 68 return (DCMD_ERR); 69 } 70 idp = &id; 71 } else { 72 type = name; 73 mdb_ctf_type_name(*idp, name, sizeof (name)); 74 } 75 76 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 77 mdb_warn("couldn't find member %s of type %s\n", member, type); 78 return (DCMD_ERR); 79 } 80 if (off % 8 != 0) { 81 mdb_warn("member %s of type %s is unsupported bitfield", 82 member, type); 83 return (DCMD_ERR); 84 } 85 off /= 8; 86 87 if (mdb_vread(buf, len, addr + off) == -1) { 88 mdb_warn("failed to read %s from %s at %p", 89 member, type, addr + off); 90 return (DCMD_ERR); 91 } 92 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 93 94 return (0); 95 } 96 97 #define GETMEMB(addr, type, member, dest) \ 98 getmember(addr, #type, NULL, #member, sizeof (dest), &(dest)) 99 100 #define GETMEMBID(addr, ctfid, member, dest) \ 101 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 102 103 static int 104 getrefcount(uintptr_t addr, mdb_ctf_id_t *id, 105 const char *member, uint64_t *rc) 106 { 107 static int gotid; 108 static mdb_ctf_id_t rc_id; 109 ulong_t off; 110 111 if (!gotid) { 112 if (mdb_ctf_lookup_by_name("struct refcount", &rc_id) == -1) { 113 mdb_warn("couldn't find struct refcount"); 114 return (DCMD_ERR); 115 } 116 gotid = TRUE; 117 } 118 119 if (mdb_ctf_offsetof(*id, member, &off) == -1) { 120 char name[64]; 121 mdb_ctf_type_name(*id, name, sizeof (name)); 122 mdb_warn("couldn't find member %s of type %s\n", member, name); 123 return (DCMD_ERR); 124 } 125 off /= 8; 126 127 return (GETMEMBID(addr + off, &rc_id, rc_count, *rc)); 128 } 129 130 static boolean_t 131 strisprint(const char *cp) 132 { 133 for (; *cp; cp++) { 134 if (!isprint(*cp)) 135 return (B_FALSE); 136 } 137 return (B_TRUE); 138 } 139 140 static int verbose; 141 142 static int 143 freelist_walk_init(mdb_walk_state_t *wsp) 144 { 145 if (wsp->walk_addr == NULL) { 146 mdb_warn("must supply starting address\n"); 147 return (WALK_ERR); 148 } 149 150 wsp->walk_data = 0; /* Index into the freelist */ 151 return (WALK_NEXT); 152 } 153 154 static int 155 freelist_walk_step(mdb_walk_state_t *wsp) 156 { 157 uint64_t entry; 158 uintptr_t number = (uintptr_t)wsp->walk_data; 159 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID", 160 "INVALID", "INVALID", "INVALID", "INVALID" }; 161 int mapshift = SPA_MINBLOCKSHIFT; 162 163 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) { 164 mdb_warn("failed to read freelist entry %p", wsp->walk_addr); 165 return (WALK_DONE); 166 } 167 wsp->walk_addr += sizeof (entry); 168 wsp->walk_data = (void *)(number + 1); 169 170 if (SM_DEBUG_DECODE(entry)) { 171 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n", 172 number, 173 ddata[SM_DEBUG_ACTION_DECODE(entry)], 174 SM_DEBUG_TXG_DECODE(entry), 175 SM_DEBUG_SYNCPASS_DECODE(entry)); 176 } else { 177 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c " 178 "size=%06llx", number, 179 SM_OFFSET_DECODE(entry) << mapshift, 180 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) << 181 mapshift, 182 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F', 183 SM_RUN_DECODE(entry) << mapshift); 184 if (verbose) 185 mdb_printf(" (raw=%012llx)\n", entry); 186 mdb_printf("\n"); 187 } 188 return (WALK_NEXT); 189 } 190 191 192 static int 193 dataset_name(uintptr_t addr, char *buf) 194 { 195 static int gotid; 196 static mdb_ctf_id_t dd_id; 197 uintptr_t dd_parent; 198 char dd_myname[MAXNAMELEN]; 199 200 if (!gotid) { 201 if (mdb_ctf_lookup_by_name("struct dsl_dir", 202 &dd_id) == -1) { 203 mdb_warn("couldn't find struct dsl_dir"); 204 return (DCMD_ERR); 205 } 206 gotid = TRUE; 207 } 208 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 209 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 210 return (DCMD_ERR); 211 } 212 213 if (dd_parent) { 214 if (dataset_name(dd_parent, buf)) 215 return (DCMD_ERR); 216 strcat(buf, "/"); 217 } 218 219 if (dd_myname[0]) 220 strcat(buf, dd_myname); 221 else 222 strcat(buf, "???"); 223 224 return (0); 225 } 226 227 static int 228 objset_name(uintptr_t addr, char *buf) 229 { 230 static int gotid; 231 static mdb_ctf_id_t os_id, ds_id; 232 uintptr_t os_dsl_dataset; 233 char ds_snapname[MAXNAMELEN]; 234 uintptr_t ds_dir; 235 236 buf[0] = '\0'; 237 238 if (!gotid) { 239 if (mdb_ctf_lookup_by_name("struct objset", 240 &os_id) == -1) { 241 mdb_warn("couldn't find struct objset"); 242 return (DCMD_ERR); 243 } 244 if (mdb_ctf_lookup_by_name("struct dsl_dataset", 245 &ds_id) == -1) { 246 mdb_warn("couldn't find struct dsl_dataset"); 247 return (DCMD_ERR); 248 } 249 250 gotid = TRUE; 251 } 252 253 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset)) 254 return (DCMD_ERR); 255 256 if (os_dsl_dataset == 0) { 257 strcat(buf, "mos"); 258 return (0); 259 } 260 261 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 262 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 263 return (DCMD_ERR); 264 } 265 266 if (ds_dir && dataset_name(ds_dir, buf)) 267 return (DCMD_ERR); 268 269 if (ds_snapname[0]) { 270 strcat(buf, "@"); 271 strcat(buf, ds_snapname); 272 } 273 return (0); 274 } 275 276 static void 277 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val, 278 const char *prefix) 279 { 280 const char *cp; 281 size_t len = strlen(prefix); 282 283 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) { 284 if (strncmp(cp, prefix, len) == 0) 285 cp += len; 286 (void) strncpy(out, cp, size); 287 } else { 288 mdb_snprintf(out, size, "? (%d)", val); 289 } 290 } 291 292 /* ARGSUSED */ 293 static int 294 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 295 { 296 /* 297 * This table can be approximately generated by running: 298 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 299 */ 300 static const char *params[] = { 301 "arc_reduce_dnlc_percent", 302 "zfs_arc_max", 303 "zfs_arc_min", 304 "arc_shrink_shift", 305 "zfs_mdcomp_disable", 306 "zfs_prefetch_disable", 307 "zfetch_max_streams", 308 "zfetch_min_sec_reap", 309 "zfetch_block_cap", 310 "zfetch_array_rd_sz", 311 "zfs_default_bs", 312 "zfs_default_ibs", 313 "metaslab_aliquot", 314 "reference_tracking_enable", 315 "reference_history", 316 "spa_max_replication_override", 317 "spa_mode_global", 318 "zfs_flags", 319 "zfs_txg_synctime_ms", 320 "zfs_txg_timeout", 321 "zfs_write_limit_min", 322 "zfs_write_limit_max", 323 "zfs_write_limit_shift", 324 "zfs_write_limit_override", 325 "zfs_no_write_throttle", 326 "zfs_vdev_cache_max", 327 "zfs_vdev_cache_size", 328 "zfs_vdev_cache_bshift", 329 "vdev_mirror_shift", 330 "zfs_vdev_max_pending", 331 "zfs_vdev_min_pending", 332 "zfs_scrub_limit", 333 "zfs_no_scrub_io", 334 "zfs_no_scrub_prefetch", 335 "zfs_vdev_time_shift", 336 "zfs_vdev_ramp_rate", 337 "zfs_vdev_aggregation_limit", 338 "fzap_default_block_shift", 339 "zfs_immediate_write_sz", 340 "zfs_read_chunk_size", 341 "zfs_nocacheflush", 342 "zil_replay_disable", 343 "metaslab_gang_bang", 344 "metaslab_df_alloc_threshold", 345 "metaslab_df_free_pct", 346 "zio_injection_enabled", 347 "zvol_immediate_write_sz", 348 }; 349 350 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 351 int sz; 352 uint64_t val64; 353 uint32_t *val32p = (uint32_t *)&val64; 354 355 sz = mdb_readvar(&val64, params[i]); 356 if (sz == 4) { 357 mdb_printf("%s = 0x%x\n", params[i], *val32p); 358 } else if (sz == 8) { 359 mdb_printf("%s = 0x%llx\n", params[i], val64); 360 } else { 361 mdb_warn("variable %s not found", params[i]); 362 } 363 } 364 365 return (DCMD_OK); 366 } 367 368 /* ARGSUSED */ 369 static int 370 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 371 { 372 mdb_ctf_id_t type_enum, checksum_enum, compress_enum; 373 char type[80], checksum[80], compress[80]; 374 blkptr_t blk, *bp = &blk; 375 char buf[BP_SPRINTF_LEN]; 376 377 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { 378 mdb_warn("failed to read blkptr_t"); 379 return (DCMD_ERR); 380 } 381 382 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 || 383 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 || 384 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) { 385 mdb_warn("Could not find blkptr enumerated types"); 386 return (DCMD_ERR); 387 } 388 389 enum_lookup(type, sizeof (type), type_enum, 390 BP_GET_TYPE(bp), "DMU_OT_"); 391 enum_lookup(checksum, sizeof (checksum), checksum_enum, 392 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_"); 393 enum_lookup(compress, sizeof (compress), compress_enum, 394 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_"); 395 396 SPRINTF_BLKPTR(mdb_snprintf, '\n', buf, bp, type, checksum, compress); 397 398 mdb_printf("%s\n", buf); 399 400 return (DCMD_OK); 401 } 402 403 /* ARGSUSED */ 404 static int 405 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 406 { 407 mdb_ctf_id_t id; 408 dmu_buf_t db; 409 uintptr_t objset; 410 uint8_t level; 411 uint64_t blkid; 412 uint64_t holds; 413 char objectname[32]; 414 char blkidname[32]; 415 char path[MAXNAMELEN]; 416 417 if (DCMD_HDRSPEC(flags)) { 418 mdb_printf(" addr object lvl blkid holds os\n"); 419 } 420 421 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &id) == -1) { 422 mdb_warn("couldn't find struct dmu_buf_impl_t"); 423 return (DCMD_ERR); 424 } 425 426 if (GETMEMBID(addr, &id, db_objset, objset) || 427 GETMEMBID(addr, &id, db, db) || 428 GETMEMBID(addr, &id, db_level, level) || 429 GETMEMBID(addr, &id, db_blkid, blkid)) { 430 return (WALK_ERR); 431 } 432 433 if (getrefcount(addr, &id, "db_holds", &holds)) { 434 return (WALK_ERR); 435 } 436 437 if (db.db_object == DMU_META_DNODE_OBJECT) 438 (void) strcpy(objectname, "mdn"); 439 else 440 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 441 (u_longlong_t)db.db_object); 442 443 if (blkid == DMU_BONUS_BLKID) 444 (void) strcpy(blkidname, "bonus"); 445 else 446 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 447 (u_longlong_t)blkid); 448 449 if (objset_name(objset, path)) { 450 return (WALK_ERR); 451 } 452 453 mdb_printf("%p %8s %1u %9s %2llu %s\n", 454 addr, objectname, level, blkidname, holds, path); 455 456 return (DCMD_OK); 457 } 458 459 /* ARGSUSED */ 460 static int 461 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 462 { 463 #define HISTOSZ 32 464 uintptr_t dbp; 465 dmu_buf_impl_t db; 466 dbuf_hash_table_t ht; 467 uint64_t bucket, ndbufs; 468 uint64_t histo[HISTOSZ]; 469 uint64_t histo2[HISTOSZ]; 470 int i, maxidx; 471 472 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 473 mdb_warn("failed to read 'dbuf_hash_table'"); 474 return (DCMD_ERR); 475 } 476 477 for (i = 0; i < HISTOSZ; i++) { 478 histo[i] = 0; 479 histo2[i] = 0; 480 } 481 482 ndbufs = 0; 483 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 484 int len; 485 486 if (mdb_vread(&dbp, sizeof (void *), 487 (uintptr_t)(ht.hash_table+bucket)) == -1) { 488 mdb_warn("failed to read hash bucket %u at %p", 489 bucket, ht.hash_table+bucket); 490 return (DCMD_ERR); 491 } 492 493 len = 0; 494 while (dbp != 0) { 495 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 496 dbp) == -1) { 497 mdb_warn("failed to read dbuf at %p", dbp); 498 return (DCMD_ERR); 499 } 500 dbp = (uintptr_t)db.db_hash_next; 501 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 502 histo2[i]++; 503 len++; 504 ndbufs++; 505 } 506 507 if (len >= HISTOSZ) 508 len = HISTOSZ-1; 509 histo[len]++; 510 } 511 512 mdb_printf("hash table has %llu buckets, %llu dbufs " 513 "(avg %llu buckets/dbuf)\n", 514 ht.hash_table_mask+1, ndbufs, 515 (ht.hash_table_mask+1)/ndbufs); 516 517 mdb_printf("\n"); 518 maxidx = 0; 519 for (i = 0; i < HISTOSZ; i++) 520 if (histo[i] > 0) 521 maxidx = i; 522 mdb_printf("hash chain length number of buckets\n"); 523 for (i = 0; i <= maxidx; i++) 524 mdb_printf("%u %llu\n", i, histo[i]); 525 526 mdb_printf("\n"); 527 maxidx = 0; 528 for (i = 0; i < HISTOSZ; i++) 529 if (histo2[i] > 0) 530 maxidx = i; 531 mdb_printf("hash chain depth number of dbufs\n"); 532 for (i = 0; i <= maxidx; i++) 533 mdb_printf("%u or more %llu %llu%%\n", 534 i, histo2[i], histo2[i]*100/ndbufs); 535 536 537 return (DCMD_OK); 538 } 539 540 #define CHAIN_END 0xffff 541 /* 542 * ::zap_leaf [-v] 543 * 544 * Print a zap_leaf_phys_t, assumed to be 16k 545 */ 546 /* ARGSUSED */ 547 static int 548 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 549 { 550 char buf[16*1024]; 551 int verbose = B_FALSE; 552 int four = B_FALSE; 553 zap_leaf_t l; 554 zap_leaf_phys_t *zlp = (void *)buf; 555 int i; 556 557 if (mdb_getopts(argc, argv, 558 'v', MDB_OPT_SETBITS, TRUE, &verbose, 559 '4', MDB_OPT_SETBITS, TRUE, &four, 560 NULL) != argc) 561 return (DCMD_USAGE); 562 563 l.l_phys = zlp; 564 l.l_bs = 14; /* assume 16k blocks */ 565 if (four) 566 l.l_bs = 12; 567 568 if (!(flags & DCMD_ADDRSPEC)) { 569 return (DCMD_USAGE); 570 } 571 572 if (mdb_vread(buf, sizeof (buf), addr) == -1) { 573 mdb_warn("failed to read zap_leaf_phys_t at %p", addr); 574 return (DCMD_ERR); 575 } 576 577 if (zlp->l_hdr.lh_block_type != ZBT_LEAF || 578 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { 579 mdb_warn("This does not appear to be a zap_leaf_phys_t"); 580 return (DCMD_ERR); 581 } 582 583 mdb_printf("zap_leaf_phys_t at %p:\n", addr); 584 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); 585 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); 586 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); 587 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, 588 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); 589 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); 590 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, 591 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? 592 "ENTRIES_CDSORTED" : ""); 593 594 if (verbose) { 595 mdb_printf(" hash table:\n"); 596 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { 597 if (zlp->l_hash[i] != CHAIN_END) 598 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); 599 } 600 } 601 602 mdb_printf(" chunks:\n"); 603 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { 604 /* LINTED: alignment */ 605 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); 606 switch (zlc->l_entry.le_type) { 607 case ZAP_CHUNK_FREE: 608 if (verbose) { 609 mdb_printf(" %u: free; lf_next = %u\n", 610 i, zlc->l_free.lf_next); 611 } 612 break; 613 case ZAP_CHUNK_ENTRY: 614 mdb_printf(" %u: entry\n", i); 615 if (verbose) { 616 mdb_printf(" le_next = %u\n", 617 zlc->l_entry.le_next); 618 } 619 mdb_printf(" le_name_chunk = %u\n", 620 zlc->l_entry.le_name_chunk); 621 mdb_printf(" le_name_numints = %u\n", 622 zlc->l_entry.le_name_numints); 623 mdb_printf(" le_value_chunk = %u\n", 624 zlc->l_entry.le_value_chunk); 625 mdb_printf(" le_value_intlen = %u\n", 626 zlc->l_entry.le_value_intlen); 627 mdb_printf(" le_value_numints = %u\n", 628 zlc->l_entry.le_value_numints); 629 mdb_printf(" le_cd = %u\n", 630 zlc->l_entry.le_cd); 631 mdb_printf(" le_hash = %llx\n", 632 zlc->l_entry.le_hash); 633 break; 634 case ZAP_CHUNK_ARRAY: 635 mdb_printf(" %u: array", i); 636 if (strisprint((char *)zlc->l_array.la_array)) 637 mdb_printf(" \"%s\"", zlc->l_array.la_array); 638 mdb_printf("\n"); 639 if (verbose) { 640 int j; 641 mdb_printf(" "); 642 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { 643 mdb_printf("%02x ", 644 zlc->l_array.la_array[j]); 645 } 646 mdb_printf("\n"); 647 } 648 if (zlc->l_array.la_next != CHAIN_END) { 649 mdb_printf(" lf_next = %u\n", 650 zlc->l_array.la_next); 651 } 652 break; 653 default: 654 mdb_printf(" %u: undefined type %u\n", 655 zlc->l_entry.le_type); 656 } 657 } 658 659 return (DCMD_OK); 660 } 661 662 typedef struct dbufs_data { 663 mdb_ctf_id_t id; 664 uint64_t objset; 665 uint64_t object; 666 uint64_t level; 667 uint64_t blkid; 668 char *osname; 669 } dbufs_data_t; 670 671 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 672 673 /* ARGSUSED */ 674 static int 675 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 676 { 677 dbufs_data_t *data = arg; 678 uintptr_t objset; 679 dmu_buf_t db; 680 uint8_t level; 681 uint64_t blkid; 682 char osname[MAXNAMELEN]; 683 684 if (GETMEMBID(addr, &data->id, db_objset, objset) || 685 GETMEMBID(addr, &data->id, db, db) || 686 GETMEMBID(addr, &data->id, db_level, level) || 687 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 688 return (WALK_ERR); 689 } 690 691 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 692 (data->osname == NULL || (objset_name(objset, osname) == 0 && 693 strcmp(data->osname, osname) == 0)) && 694 (data->object == DBUFS_UNSET || data->object == db.db_object) && 695 (data->level == DBUFS_UNSET || data->level == level) && 696 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 697 mdb_printf("%#lr\n", addr); 698 } 699 return (WALK_NEXT); 700 } 701 702 /* ARGSUSED */ 703 static int 704 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 705 { 706 dbufs_data_t data; 707 char *object = NULL; 708 char *blkid = NULL; 709 710 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 711 data.osname = NULL; 712 713 if (mdb_getopts(argc, argv, 714 'O', MDB_OPT_UINT64, &data.objset, 715 'n', MDB_OPT_STR, &data.osname, 716 'o', MDB_OPT_STR, &object, 717 'l', MDB_OPT_UINT64, &data.level, 718 'b', MDB_OPT_STR, &blkid) != argc) { 719 return (DCMD_USAGE); 720 } 721 722 if (object) { 723 if (strcmp(object, "mdn") == 0) { 724 data.object = DMU_META_DNODE_OBJECT; 725 } else { 726 data.object = mdb_strtoull(object); 727 } 728 } 729 730 if (blkid) { 731 if (strcmp(blkid, "bonus") == 0) { 732 data.blkid = DMU_BONUS_BLKID; 733 } else { 734 data.blkid = mdb_strtoull(blkid); 735 } 736 } 737 738 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &data.id) == -1) { 739 mdb_warn("couldn't find struct dmu_buf_impl_t"); 740 return (DCMD_ERR); 741 } 742 743 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 744 mdb_warn("can't walk dbufs"); 745 return (DCMD_ERR); 746 } 747 748 return (DCMD_OK); 749 } 750 751 typedef struct abuf_find_data { 752 dva_t dva; 753 mdb_ctf_id_t id; 754 } abuf_find_data_t; 755 756 /* ARGSUSED */ 757 static int 758 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 759 { 760 abuf_find_data_t *data = arg; 761 dva_t dva; 762 763 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 764 return (WALK_ERR); 765 } 766 767 if (dva.dva_word[0] == data->dva.dva_word[0] && 768 dva.dva_word[1] == data->dva.dva_word[1]) { 769 mdb_printf("%#lr\n", addr); 770 } 771 return (WALK_NEXT); 772 } 773 774 /* ARGSUSED */ 775 static int 776 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 777 { 778 abuf_find_data_t data; 779 GElf_Sym sym; 780 int i; 781 const char *syms[] = { 782 "ARC_mru", 783 "ARC_mru_ghost", 784 "ARC_mfu", 785 "ARC_mfu_ghost", 786 }; 787 788 if (argc != 2) 789 return (DCMD_USAGE); 790 791 for (i = 0; i < 2; i ++) { 792 switch (argv[i].a_type) { 793 case MDB_TYPE_STRING: 794 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 795 break; 796 case MDB_TYPE_IMMEDIATE: 797 data.dva.dva_word[i] = argv[i].a_un.a_val; 798 break; 799 default: 800 return (DCMD_USAGE); 801 } 802 } 803 804 if (mdb_ctf_lookup_by_name("struct arc_buf_hdr", &data.id) == -1) { 805 mdb_warn("couldn't find struct arc_buf_hdr"); 806 return (DCMD_ERR); 807 } 808 809 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 810 if (mdb_lookup_by_name(syms[i], &sym)) { 811 mdb_warn("can't find symbol %s", syms[i]); 812 return (DCMD_ERR); 813 } 814 815 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 816 mdb_warn("can't walk %s", syms[i]); 817 return (DCMD_ERR); 818 } 819 } 820 821 return (DCMD_OK); 822 } 823 824 /* ARGSUSED */ 825 static int 826 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 827 { 828 static mdb_ctf_id_t id; 829 static boolean_t gotid; 830 static ulong_t off; 831 832 int *verbosep = arg; 833 time_t timestamp; 834 char buf[1024]; 835 836 if (!gotid) { 837 if (mdb_ctf_lookup_by_name("struct zfs_dbgmsg", &id) == -1) { 838 mdb_warn("couldn't find struct zfs_dbgmsg"); 839 return (WALK_ERR); 840 } 841 gotid = TRUE; 842 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 843 mdb_warn("couldn't find zdm_msg"); 844 return (WALK_ERR); 845 } 846 off /= 8; 847 } 848 849 850 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 851 return (WALK_ERR); 852 } 853 854 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 855 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 856 return (DCMD_ERR); 857 } 858 859 if (*verbosep) 860 mdb_printf("%Y ", timestamp); 861 862 mdb_printf("%s\n", buf); 863 864 if (*verbosep) 865 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 866 867 return (WALK_NEXT); 868 } 869 870 /* ARGSUSED */ 871 static int 872 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 873 { 874 GElf_Sym sym; 875 int verbose = FALSE; 876 877 if (mdb_getopts(argc, argv, 878 'v', MDB_OPT_SETBITS, TRUE, &verbose, 879 NULL) != argc) 880 return (DCMD_USAGE); 881 882 if (mdb_lookup_by_name("zfs_dbgmsgs", &sym)) { 883 mdb_warn("can't find zfs_dbgmsgs"); 884 return (DCMD_ERR); 885 } 886 887 if (mdb_pwalk("list", dbgmsg_cb, &verbose, sym.st_value) != 0) { 888 mdb_warn("can't walk zfs_dbgmsgs"); 889 return (DCMD_ERR); 890 } 891 892 return (DCMD_OK); 893 } 894 895 /*ARGSUSED*/ 896 static int 897 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 898 { 899 kstat_named_t *stats; 900 GElf_Sym sym; 901 int nstats, i; 902 uint_t opt_a = FALSE; 903 uint_t opt_b = FALSE; 904 uint_t shift = 0; 905 const char *suffix; 906 907 static const char *bytestats[] = { 908 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 909 NULL 910 }; 911 912 static const char *extras[] = { 913 "arc_no_grow", "arc_tempreserve", 914 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 915 NULL 916 }; 917 918 if (mdb_lookup_by_name("arc_stats", &sym) == -1) { 919 mdb_warn("failed to find 'arc_stats'"); 920 return (DCMD_ERR); 921 } 922 923 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 924 925 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 926 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 927 return (DCMD_ERR); 928 } 929 930 nstats = sym.st_size / sizeof (kstat_named_t); 931 932 /* NB: -a / opt_a are ignored for backwards compatability */ 933 if (mdb_getopts(argc, argv, 934 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 935 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 936 'k', MDB_OPT_SETBITS, 10, &shift, 937 'm', MDB_OPT_SETBITS, 20, &shift, 938 'g', MDB_OPT_SETBITS, 30, &shift, 939 NULL) != argc) 940 return (DCMD_USAGE); 941 942 if (!opt_b && !shift) 943 shift = 20; 944 945 switch (shift) { 946 case 0: 947 suffix = "B"; 948 break; 949 case 10: 950 suffix = "KB"; 951 break; 952 case 20: 953 suffix = "MB"; 954 break; 955 case 30: 956 suffix = "GB"; 957 break; 958 default: 959 suffix = "XX"; 960 } 961 962 for (i = 0; i < nstats; i++) { 963 int j; 964 boolean_t bytes = B_FALSE; 965 966 for (j = 0; bytestats[j]; j++) { 967 if (strcmp(stats[i].name, bytestats[j]) == 0) { 968 bytes = B_TRUE; 969 break; 970 } 971 } 972 973 if (bytes) { 974 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 975 stats[i].value.ui64 >> shift, suffix); 976 } else { 977 mdb_printf("%-25s = %9llu\n", stats[i].name, 978 stats[i].value.ui64); 979 } 980 } 981 982 for (i = 0; extras[i]; i++) { 983 uint64_t buf; 984 985 if (mdb_lookup_by_name(extras[i], &sym) == -1) { 986 mdb_warn("failed to find '%s'", extras[i]); 987 return (DCMD_ERR); 988 } 989 990 if (sym.st_size != sizeof (uint64_t) && 991 sym.st_size != sizeof (uint32_t)) { 992 mdb_warn("expected scalar for variable '%s'\n", 993 extras[i]); 994 return (DCMD_ERR); 995 } 996 997 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 998 mdb_warn("couldn't read '%s'", extras[i]); 999 return (DCMD_ERR); 1000 } 1001 1002 mdb_printf("%-25s = ", extras[i]); 1003 1004 /* NB: all the 64-bit extras happen to be byte counts */ 1005 if (sym.st_size == sizeof (uint64_t)) 1006 mdb_printf("%9llu %s\n", buf >> shift, suffix); 1007 1008 if (sym.st_size == sizeof (uint32_t)) 1009 mdb_printf("%9d\n", *((uint32_t *)&buf)); 1010 } 1011 return (DCMD_OK); 1012 } 1013 1014 /* 1015 * ::spa 1016 * 1017 * -c Print configuration information as well 1018 * -v Print vdev state 1019 * -e Print vdev error stats 1020 * 1021 * Print a summarized spa_t. When given no arguments, prints out a table of all 1022 * active pools on the system. 1023 */ 1024 /* ARGSUSED */ 1025 static int 1026 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1027 { 1028 spa_t spa; 1029 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1030 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1031 const char *state; 1032 int config = FALSE; 1033 int vdevs = FALSE; 1034 int errors = FALSE; 1035 1036 if (mdb_getopts(argc, argv, 1037 'c', MDB_OPT_SETBITS, TRUE, &config, 1038 'v', MDB_OPT_SETBITS, TRUE, &vdevs, 1039 'e', MDB_OPT_SETBITS, TRUE, &errors, 1040 NULL) != argc) 1041 return (DCMD_USAGE); 1042 1043 if (!(flags & DCMD_ADDRSPEC)) { 1044 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1045 mdb_warn("can't walk spa"); 1046 return (DCMD_ERR); 1047 } 1048 1049 return (DCMD_OK); 1050 } 1051 1052 if (flags & DCMD_PIPE_OUT) { 1053 mdb_printf("%#lr\n", addr); 1054 return (DCMD_OK); 1055 } 1056 1057 if (DCMD_HDRSPEC(flags)) 1058 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1059 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1060 1061 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1062 mdb_warn("failed to read spa_t at %p", addr); 1063 return (DCMD_ERR); 1064 } 1065 1066 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1067 state = "UNKNOWN"; 1068 else 1069 state = statetab[spa.spa_state]; 1070 1071 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1072 1073 if (config) { 1074 mdb_printf("\n"); 1075 mdb_inc_indent(4); 1076 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1077 NULL) != DCMD_OK) 1078 return (DCMD_ERR); 1079 mdb_dec_indent(4); 1080 } 1081 1082 if (vdevs || errors) { 1083 mdb_arg_t v; 1084 1085 v.a_type = MDB_TYPE_STRING; 1086 v.a_un.a_str = "-e"; 1087 1088 mdb_printf("\n"); 1089 mdb_inc_indent(4); 1090 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0, 1091 &v) != DCMD_OK) 1092 return (DCMD_ERR); 1093 mdb_dec_indent(4); 1094 } 1095 1096 return (DCMD_OK); 1097 } 1098 1099 /* 1100 * ::spa_config 1101 * 1102 * Given a spa_t, print the configuration information stored in spa_config. 1103 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1104 * We simply read the value of spa_config and pass off to ::nvlist. 1105 */ 1106 /* ARGSUSED */ 1107 static int 1108 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1109 { 1110 spa_t spa; 1111 1112 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1113 return (DCMD_USAGE); 1114 1115 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1116 mdb_warn("failed to read spa_t at %p", addr); 1117 return (DCMD_ERR); 1118 } 1119 1120 if (spa.spa_config == NULL) { 1121 mdb_printf("(none)\n"); 1122 return (DCMD_OK); 1123 } 1124 1125 return (mdb_call_dcmd("nvlist", (uintptr_t)spa.spa_config, flags, 1126 0, NULL)); 1127 } 1128 1129 /* 1130 * ::vdev 1131 * 1132 * Print out a summarized vdev_t, in the following form: 1133 * 1134 * ADDR STATE AUX DESC 1135 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1136 * 1137 * If '-r' is specified, recursively visit all children. 1138 * 1139 * With '-e', the statistics associated with the vdev are printed as well. 1140 */ 1141 static int 1142 do_print_vdev(uintptr_t addr, int flags, int depth, int stats, 1143 int recursive) 1144 { 1145 vdev_t vdev; 1146 char desc[MAXNAMELEN]; 1147 int c, children; 1148 uintptr_t *child; 1149 const char *state, *aux; 1150 1151 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1152 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1153 return (DCMD_ERR); 1154 } 1155 1156 if (flags & DCMD_PIPE_OUT) { 1157 mdb_printf("%#lr", addr); 1158 } else { 1159 if (vdev.vdev_path != NULL) { 1160 if (mdb_readstr(desc, sizeof (desc), 1161 (uintptr_t)vdev.vdev_path) == -1) { 1162 mdb_warn("failed to read vdev_path at %p\n", 1163 vdev.vdev_path); 1164 return (DCMD_ERR); 1165 } 1166 } else if (vdev.vdev_ops != NULL) { 1167 vdev_ops_t ops; 1168 if (mdb_vread(&ops, sizeof (ops), 1169 (uintptr_t)vdev.vdev_ops) == -1) { 1170 mdb_warn("failed to read vdev_ops at %p\n", 1171 vdev.vdev_ops); 1172 return (DCMD_ERR); 1173 } 1174 (void) strcpy(desc, ops.vdev_op_type); 1175 } else { 1176 (void) strcpy(desc, "<unknown>"); 1177 } 1178 1179 if (depth == 0 && DCMD_HDRSPEC(flags)) 1180 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1181 "ADDR", "STATE", "AUX", 1182 sizeof (uintptr_t) == 4 ? 43 : 35, 1183 "DESCRIPTION"); 1184 1185 mdb_printf("%0?p ", addr); 1186 1187 switch (vdev.vdev_state) { 1188 case VDEV_STATE_CLOSED: 1189 state = "CLOSED"; 1190 break; 1191 case VDEV_STATE_OFFLINE: 1192 state = "OFFLINE"; 1193 break; 1194 case VDEV_STATE_CANT_OPEN: 1195 state = "CANT_OPEN"; 1196 break; 1197 case VDEV_STATE_DEGRADED: 1198 state = "DEGRADED"; 1199 break; 1200 case VDEV_STATE_HEALTHY: 1201 state = "HEALTHY"; 1202 break; 1203 case VDEV_STATE_REMOVED: 1204 state = "REMOVED"; 1205 break; 1206 case VDEV_STATE_FAULTED: 1207 state = "FAULTED"; 1208 break; 1209 default: 1210 state = "UNKNOWN"; 1211 break; 1212 } 1213 1214 switch (vdev.vdev_stat.vs_aux) { 1215 case VDEV_AUX_NONE: 1216 aux = "-"; 1217 break; 1218 case VDEV_AUX_OPEN_FAILED: 1219 aux = "OPEN_FAILED"; 1220 break; 1221 case VDEV_AUX_CORRUPT_DATA: 1222 aux = "CORRUPT_DATA"; 1223 break; 1224 case VDEV_AUX_NO_REPLICAS: 1225 aux = "NO_REPLICAS"; 1226 break; 1227 case VDEV_AUX_BAD_GUID_SUM: 1228 aux = "BAD_GUID_SUM"; 1229 break; 1230 case VDEV_AUX_TOO_SMALL: 1231 aux = "TOO_SMALL"; 1232 break; 1233 case VDEV_AUX_BAD_LABEL: 1234 aux = "BAD_LABEL"; 1235 break; 1236 case VDEV_AUX_VERSION_NEWER: 1237 aux = "VERS_NEWER"; 1238 break; 1239 case VDEV_AUX_VERSION_OLDER: 1240 aux = "VERS_OLDER"; 1241 break; 1242 case VDEV_AUX_UNSUP_FEAT: 1243 aux = "UNSUP_FEAT"; 1244 break; 1245 case VDEV_AUX_SPARED: 1246 aux = "SPARED"; 1247 break; 1248 case VDEV_AUX_ERR_EXCEEDED: 1249 aux = "ERR_EXCEEDED"; 1250 break; 1251 case VDEV_AUX_IO_FAILURE: 1252 aux = "IO_FAILURE"; 1253 break; 1254 case VDEV_AUX_BAD_LOG: 1255 aux = "BAD_LOG"; 1256 break; 1257 case VDEV_AUX_EXTERNAL: 1258 aux = "EXTERNAL"; 1259 break; 1260 case VDEV_AUX_SPLIT_POOL: 1261 aux = "SPLIT_POOL"; 1262 break; 1263 default: 1264 aux = "UNKNOWN"; 1265 break; 1266 } 1267 1268 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1269 1270 if (stats) { 1271 vdev_stat_t *vs = &vdev.vdev_stat; 1272 int i; 1273 1274 mdb_inc_indent(4); 1275 mdb_printf("\n"); 1276 mdb_printf("%<u> %12s %12s %12s %12s " 1277 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1278 "IOCTL"); 1279 mdb_printf("OPS "); 1280 for (i = 1; i < ZIO_TYPES; i++) 1281 mdb_printf("%11#llx%s", vs->vs_ops[i], 1282 i == ZIO_TYPES - 1 ? "" : " "); 1283 mdb_printf("\n"); 1284 mdb_printf("BYTES "); 1285 for (i = 1; i < ZIO_TYPES; i++) 1286 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1287 i == ZIO_TYPES - 1 ? "" : " "); 1288 1289 1290 mdb_printf("\n"); 1291 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1292 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1293 mdb_printf("ECKSUM %10#llx\n", 1294 vs->vs_checksum_errors); 1295 mdb_dec_indent(4); 1296 } 1297 1298 if (stats) 1299 mdb_printf("\n"); 1300 } 1301 1302 children = vdev.vdev_children; 1303 1304 if (children == 0 || !recursive) 1305 return (DCMD_OK); 1306 1307 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1308 if (mdb_vread(child, children * sizeof (void *), 1309 (uintptr_t)vdev.vdev_child) == -1) { 1310 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1311 return (DCMD_ERR); 1312 } 1313 1314 for (c = 0; c < children; c++) { 1315 if (do_print_vdev(child[c], flags, depth + 2, stats, 1316 recursive)) 1317 return (DCMD_ERR); 1318 } 1319 1320 return (DCMD_OK); 1321 } 1322 1323 static int 1324 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1325 { 1326 int recursive = FALSE; 1327 int stats = FALSE; 1328 uint64_t depth = 0; 1329 1330 if (mdb_getopts(argc, argv, 1331 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1332 'e', MDB_OPT_SETBITS, TRUE, &stats, 1333 'd', MDB_OPT_UINT64, &depth, 1334 NULL) != argc) 1335 return (DCMD_USAGE); 1336 1337 if (!(flags & DCMD_ADDRSPEC)) { 1338 mdb_warn("no vdev_t address given\n"); 1339 return (DCMD_ERR); 1340 } 1341 1342 return (do_print_vdev(addr, flags, (int)depth, stats, recursive)); 1343 } 1344 1345 typedef struct metaslab_walk_data { 1346 uint64_t mw_numvdevs; 1347 uintptr_t *mw_vdevs; 1348 int mw_curvdev; 1349 uint64_t mw_nummss; 1350 uintptr_t *mw_mss; 1351 int mw_curms; 1352 } metaslab_walk_data_t; 1353 1354 static int 1355 metaslab_walk_step(mdb_walk_state_t *wsp) 1356 { 1357 metaslab_walk_data_t *mw = wsp->walk_data; 1358 metaslab_t ms; 1359 uintptr_t msp; 1360 1361 if (mw->mw_curvdev >= mw->mw_numvdevs) 1362 return (WALK_DONE); 1363 1364 if (mw->mw_mss == NULL) { 1365 uintptr_t mssp; 1366 uintptr_t vdevp; 1367 1368 ASSERT(mw->mw_curms == 0); 1369 ASSERT(mw->mw_nummss == 0); 1370 1371 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1372 if (GETMEMB(vdevp, struct vdev, vdev_ms, mssp) || 1373 GETMEMB(vdevp, struct vdev, vdev_ms_count, mw->mw_nummss)) { 1374 return (WALK_ERR); 1375 } 1376 1377 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1378 UM_SLEEP | UM_GC); 1379 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1380 mssp) == -1) { 1381 mdb_warn("failed to read vdev_ms at %p", mssp); 1382 return (WALK_ERR); 1383 } 1384 } 1385 1386 if (mw->mw_curms >= mw->mw_nummss) { 1387 mw->mw_mss = NULL; 1388 mw->mw_curms = 0; 1389 mw->mw_nummss = 0; 1390 mw->mw_curvdev++; 1391 return (WALK_NEXT); 1392 } 1393 1394 msp = mw->mw_mss[mw->mw_curms]; 1395 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1396 mdb_warn("failed to read metaslab_t at %p", msp); 1397 return (WALK_ERR); 1398 } 1399 1400 mw->mw_curms++; 1401 1402 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1403 } 1404 1405 /* ARGSUSED */ 1406 static int 1407 metaslab_walk_init(mdb_walk_state_t *wsp) 1408 { 1409 metaslab_walk_data_t *mw; 1410 uintptr_t root_vdevp; 1411 uintptr_t childp; 1412 1413 if (wsp->walk_addr == NULL) { 1414 mdb_warn("must supply address of spa_t\n"); 1415 return (WALK_ERR); 1416 } 1417 1418 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1419 1420 if (GETMEMB(wsp->walk_addr, struct spa, spa_root_vdev, root_vdevp) || 1421 GETMEMB(root_vdevp, struct vdev, vdev_children, mw->mw_numvdevs) || 1422 GETMEMB(root_vdevp, struct vdev, vdev_child, childp)) { 1423 return (DCMD_ERR); 1424 } 1425 1426 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1427 UM_SLEEP | UM_GC); 1428 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1429 childp) == -1) { 1430 mdb_warn("failed to read root vdev children at %p", childp); 1431 return (DCMD_ERR); 1432 } 1433 1434 wsp->walk_data = mw; 1435 1436 return (WALK_NEXT); 1437 } 1438 1439 typedef struct mdb_spa { 1440 uintptr_t spa_dsl_pool; 1441 uintptr_t spa_root_vdev; 1442 } mdb_spa_t; 1443 1444 typedef struct mdb_dsl_dir { 1445 uintptr_t dd_phys; 1446 int64_t dd_space_towrite[TXG_SIZE]; 1447 } mdb_dsl_dir_t; 1448 1449 typedef struct mdb_dsl_dir_phys { 1450 uint64_t dd_used_bytes; 1451 uint64_t dd_compressed_bytes; 1452 uint64_t dd_uncompressed_bytes; 1453 } mdb_dsl_dir_phys_t; 1454 1455 typedef struct mdb_vdev { 1456 uintptr_t vdev_parent; 1457 uintptr_t vdev_ms; 1458 uint64_t vdev_ms_count; 1459 vdev_stat_t vdev_stat; 1460 } mdb_vdev_t; 1461 1462 typedef struct mdb_metaslab { 1463 space_map_t ms_allocmap[TXG_SIZE]; 1464 space_map_t ms_freemap[TXG_SIZE]; 1465 space_map_t ms_map; 1466 space_map_obj_t ms_smo; 1467 space_map_obj_t ms_smo_syncing; 1468 } mdb_metaslab_t; 1469 1470 typedef struct space_data { 1471 uint64_t ms_allocmap[TXG_SIZE]; 1472 uint64_t ms_freemap[TXG_SIZE]; 1473 uint64_t ms_map; 1474 uint64_t avail; 1475 uint64_t nowavail; 1476 } space_data_t; 1477 1478 /* ARGSUSED */ 1479 static int 1480 space_cb(uintptr_t addr, const void *unknown, void *arg) 1481 { 1482 space_data_t *sd = arg; 1483 mdb_metaslab_t ms; 1484 1485 if (GETMEMB(addr, struct metaslab, ms_allocmap, ms.ms_allocmap) || 1486 GETMEMB(addr, struct metaslab, ms_freemap, ms.ms_freemap) || 1487 GETMEMB(addr, struct metaslab, ms_map, ms.ms_map) || 1488 GETMEMB(addr, struct metaslab, ms_smo, ms.ms_smo) || 1489 GETMEMB(addr, struct metaslab, ms_smo_syncing, ms.ms_smo_syncing)) { 1490 return (WALK_ERR); 1491 } 1492 1493 sd->ms_allocmap[0] += ms.ms_allocmap[0].sm_space; 1494 sd->ms_allocmap[1] += ms.ms_allocmap[1].sm_space; 1495 sd->ms_allocmap[2] += ms.ms_allocmap[2].sm_space; 1496 sd->ms_allocmap[3] += ms.ms_allocmap[3].sm_space; 1497 sd->ms_freemap[0] += ms.ms_freemap[0].sm_space; 1498 sd->ms_freemap[1] += ms.ms_freemap[1].sm_space; 1499 sd->ms_freemap[2] += ms.ms_freemap[2].sm_space; 1500 sd->ms_freemap[3] += ms.ms_freemap[3].sm_space; 1501 sd->ms_map += ms.ms_map.sm_space; 1502 sd->avail += ms.ms_map.sm_size - ms.ms_smo.smo_alloc; 1503 sd->nowavail += ms.ms_map.sm_size - ms.ms_smo_syncing.smo_alloc; 1504 1505 return (WALK_NEXT); 1506 } 1507 1508 /* 1509 * ::spa_space [-b] 1510 * 1511 * Given a spa_t, print out it's on-disk space usage and in-core 1512 * estimates of future usage. If -b is given, print space in bytes. 1513 * Otherwise print in megabytes. 1514 */ 1515 /* ARGSUSED */ 1516 static int 1517 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1518 { 1519 mdb_spa_t spa; 1520 uintptr_t dp_root_dir; 1521 mdb_dsl_dir_t dd; 1522 mdb_dsl_dir_phys_t dsp; 1523 uint64_t children; 1524 uintptr_t childaddr; 1525 space_data_t sd; 1526 int shift = 20; 1527 char *suffix = "M"; 1528 int bits = FALSE; 1529 1530 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bits, NULL) != 1531 argc) 1532 return (DCMD_USAGE); 1533 if (!(flags & DCMD_ADDRSPEC)) 1534 return (DCMD_USAGE); 1535 1536 if (bits) { 1537 shift = 0; 1538 suffix = ""; 1539 } 1540 1541 if (GETMEMB(addr, struct spa, spa_dsl_pool, spa.spa_dsl_pool) || 1542 GETMEMB(addr, struct spa, spa_root_vdev, spa.spa_root_vdev) || 1543 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_children, children) || 1544 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_child, childaddr) || 1545 GETMEMB(spa.spa_dsl_pool, struct dsl_pool, 1546 dp_root_dir, dp_root_dir) || 1547 GETMEMB(dp_root_dir, struct dsl_dir, dd_phys, dd.dd_phys) || 1548 GETMEMB(dp_root_dir, struct dsl_dir, 1549 dd_space_towrite, dd.dd_space_towrite) || 1550 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1551 dd_used_bytes, dsp.dd_used_bytes) || 1552 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1553 dd_compressed_bytes, dsp.dd_compressed_bytes) || 1554 GETMEMB(dd.dd_phys, struct dsl_dir_phys, 1555 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) { 1556 return (DCMD_ERR); 1557 } 1558 1559 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1560 dd.dd_space_towrite[0] >> shift, suffix, 1561 dd.dd_space_towrite[1] >> shift, suffix, 1562 dd.dd_space_towrite[2] >> shift, suffix, 1563 dd.dd_space_towrite[3] >> shift, suffix); 1564 1565 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1566 dsp.dd_used_bytes >> shift, suffix); 1567 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1568 dsp.dd_compressed_bytes >> shift, suffix); 1569 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1570 dsp.dd_uncompressed_bytes >> shift, suffix); 1571 1572 bzero(&sd, sizeof (sd)); 1573 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1574 mdb_warn("can't walk metaslabs"); 1575 return (DCMD_ERR); 1576 } 1577 1578 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1579 sd.ms_allocmap[0] >> shift, suffix, 1580 sd.ms_allocmap[1] >> shift, suffix, 1581 sd.ms_allocmap[2] >> shift, suffix, 1582 sd.ms_allocmap[3] >> shift, suffix); 1583 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1584 sd.ms_freemap[0] >> shift, suffix, 1585 sd.ms_freemap[1] >> shift, suffix, 1586 sd.ms_freemap[2] >> shift, suffix, 1587 sd.ms_freemap[3] >> shift, suffix); 1588 mdb_printf("ms_map = %llu%s\n", sd.ms_map >> shift, suffix); 1589 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1590 mdb_printf("current syncing avail = %llu%s\n", 1591 sd.nowavail >> shift, suffix); 1592 1593 return (DCMD_OK); 1594 } 1595 1596 /* 1597 * ::spa_verify 1598 * 1599 * Given a spa_t, verify that that the pool is self-consistent. 1600 * Currently, it only checks to make sure that the vdev tree exists. 1601 */ 1602 /* ARGSUSED */ 1603 static int 1604 spa_verify(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1605 { 1606 spa_t spa; 1607 1608 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1609 return (DCMD_USAGE); 1610 1611 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1612 mdb_warn("failed to read spa_t at %p", addr); 1613 return (DCMD_ERR); 1614 } 1615 1616 if (spa.spa_root_vdev == NULL) { 1617 mdb_printf("no vdev tree present\n"); 1618 return (DCMD_OK); 1619 } 1620 1621 return (DCMD_OK); 1622 } 1623 1624 static int 1625 spa_print_aux(spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 1626 const char *name) 1627 { 1628 uintptr_t *aux; 1629 size_t len; 1630 int ret, i; 1631 1632 /* 1633 * Iterate over aux vdevs and print those out as well. This is a 1634 * little annoying because we don't have a root vdev to pass to ::vdev. 1635 * Instead, we print a single line and then call it for each child 1636 * vdev. 1637 */ 1638 if (sav->sav_count != 0) { 1639 v[1].a_type = MDB_TYPE_STRING; 1640 v[1].a_un.a_str = "-d"; 1641 v[2].a_type = MDB_TYPE_IMMEDIATE; 1642 v[2].a_un.a_val = 2; 1643 1644 len = sav->sav_count * sizeof (uintptr_t); 1645 aux = mdb_alloc(len, UM_SLEEP); 1646 if (mdb_vread(aux, len, 1647 (uintptr_t)sav->sav_vdevs) == -1) { 1648 mdb_free(aux, len); 1649 mdb_warn("failed to read l2cache vdevs at %p", 1650 sav->sav_vdevs); 1651 return (DCMD_ERR); 1652 } 1653 1654 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 1655 1656 for (i = 0; i < sav->sav_count; i++) { 1657 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 1658 if (ret != DCMD_OK) { 1659 mdb_free(aux, len); 1660 return (ret); 1661 } 1662 } 1663 1664 mdb_free(aux, len); 1665 } 1666 1667 return (0); 1668 } 1669 1670 /* 1671 * ::spa_vdevs 1672 * 1673 * -e Include error stats 1674 * 1675 * Print out a summarized list of vdevs for the given spa_t. 1676 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 1677 * iterating over the cache devices. 1678 */ 1679 /* ARGSUSED */ 1680 static int 1681 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1682 { 1683 spa_t spa; 1684 mdb_arg_t v[3]; 1685 int errors = FALSE; 1686 int ret; 1687 1688 if (mdb_getopts(argc, argv, 1689 'e', MDB_OPT_SETBITS, TRUE, &errors, 1690 NULL) != argc) 1691 return (DCMD_USAGE); 1692 1693 if (!(flags & DCMD_ADDRSPEC)) 1694 return (DCMD_USAGE); 1695 1696 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1697 mdb_warn("failed to read spa_t at %p", addr); 1698 return (DCMD_ERR); 1699 } 1700 1701 /* 1702 * Unitialized spa_t structures can have a NULL root vdev. 1703 */ 1704 if (spa.spa_root_vdev == NULL) { 1705 mdb_printf("no associated vdevs\n"); 1706 return (DCMD_OK); 1707 } 1708 1709 v[0].a_type = MDB_TYPE_STRING; 1710 v[0].a_un.a_str = errors ? "-re" : "-r"; 1711 1712 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1713 flags, 1, v); 1714 if (ret != DCMD_OK) 1715 return (ret); 1716 1717 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 1718 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 1719 return (DCMD_ERR); 1720 1721 return (DCMD_OK); 1722 } 1723 1724 /* 1725 * ::zio 1726 * 1727 * Print a summary of zio_t and all its children. This is intended to display a 1728 * zio tree, and hence we only pick the most important pieces of information for 1729 * the main summary. More detailed information can always be found by doing a 1730 * '::print zio' on the underlying zio_t. The columns we display are: 1731 * 1732 * ADDRESS TYPE STAGE WAITER 1733 * 1734 * The 'address' column is indented by one space for each depth level as we 1735 * descend down the tree. 1736 */ 1737 1738 #define ZIO_MAXINDENT 24 1739 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 1740 #define ZIO_WALK_SELF 0 1741 #define ZIO_WALK_CHILD 1 1742 #define ZIO_WALK_PARENT 2 1743 1744 typedef struct zio_print_args { 1745 int zpa_current_depth; 1746 int zpa_min_depth; 1747 int zpa_max_depth; 1748 int zpa_type; 1749 uint_t zpa_flags; 1750 } zio_print_args_t; 1751 1752 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 1753 1754 static int 1755 zio_print_cb(uintptr_t addr, const void *data, void *priv) 1756 { 1757 const zio_t *zio = data; 1758 zio_print_args_t *zpa = priv; 1759 mdb_ctf_id_t type_enum, stage_enum; 1760 int indent = zpa->zpa_current_depth; 1761 const char *type, *stage; 1762 uintptr_t laddr; 1763 1764 if (indent > ZIO_MAXINDENT) 1765 indent = ZIO_MAXINDENT; 1766 1767 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 1768 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 1769 mdb_warn("failed to lookup zio enums"); 1770 return (WALK_ERR); 1771 } 1772 1773 if ((type = mdb_ctf_enum_name(type_enum, zio->io_type)) != NULL) 1774 type += sizeof ("ZIO_TYPE_") - 1; 1775 else 1776 type = "?"; 1777 1778 if ((stage = mdb_ctf_enum_name(stage_enum, zio->io_stage)) != NULL) 1779 stage += sizeof ("ZIO_STAGE_") - 1; 1780 else 1781 stage = "?"; 1782 1783 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 1784 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 1785 mdb_printf("%?p\n", addr); 1786 } else { 1787 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 1788 ZIO_MAXWIDTH - indent, addr, type, stage); 1789 if (zio->io_waiter) 1790 mdb_printf("%?p\n", zio->io_waiter); 1791 else 1792 mdb_printf("-\n"); 1793 } 1794 } 1795 1796 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 1797 return (WALK_NEXT); 1798 1799 if (zpa->zpa_type == ZIO_WALK_PARENT) 1800 laddr = addr + OFFSETOF(zio_t, io_parent_list); 1801 else 1802 laddr = addr + OFFSETOF(zio_t, io_child_list); 1803 1804 zpa->zpa_current_depth++; 1805 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 1806 mdb_warn("failed to walk zio_t children at %p\n", laddr); 1807 return (WALK_ERR); 1808 } 1809 zpa->zpa_current_depth--; 1810 1811 return (WALK_NEXT); 1812 } 1813 1814 /* ARGSUSED */ 1815 static int 1816 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 1817 { 1818 zio_link_t zl; 1819 zio_t zio; 1820 uintptr_t ziop; 1821 zio_print_args_t *zpa = arg; 1822 1823 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 1824 mdb_warn("failed to read zio_link_t at %p", addr); 1825 return (WALK_ERR); 1826 } 1827 1828 if (zpa->zpa_type == ZIO_WALK_PARENT) 1829 ziop = (uintptr_t)zl.zl_parent; 1830 else 1831 ziop = (uintptr_t)zl.zl_child; 1832 1833 if (mdb_vread(&zio, sizeof (zio_t), ziop) == -1) { 1834 mdb_warn("failed to read zio_t at %p", ziop); 1835 return (WALK_ERR); 1836 } 1837 1838 return (zio_print_cb(ziop, &zio, arg)); 1839 } 1840 1841 /* ARGSUSED */ 1842 static int 1843 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1844 { 1845 zio_t zio; 1846 zio_print_args_t zpa = { 0 }; 1847 1848 if (!(flags & DCMD_ADDRSPEC)) 1849 return (DCMD_USAGE); 1850 1851 if (mdb_getopts(argc, argv, 1852 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 1853 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 1854 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, 1855 NULL) != argc) 1856 return (DCMD_USAGE); 1857 1858 zpa.zpa_flags = flags; 1859 if (zpa.zpa_max_depth != 0) { 1860 if (zpa.zpa_type == ZIO_WALK_SELF) 1861 zpa.zpa_type = ZIO_WALK_CHILD; 1862 } else if (zpa.zpa_type != ZIO_WALK_SELF) { 1863 zpa.zpa_min_depth = 1; 1864 zpa.zpa_max_depth = 1; 1865 } 1866 1867 if (mdb_vread(&zio, sizeof (zio_t), addr) == -1) { 1868 mdb_warn("failed to read zio_t at %p", addr); 1869 return (DCMD_ERR); 1870 } 1871 1872 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) 1873 mdb_printf("%<u>%-*s %-5s %-16s %-?s%</u>\n", ZIO_MAXWIDTH, 1874 "ADDRESS", "TYPE", "STAGE", "WAITER"); 1875 1876 if (zio_print_cb(addr, &zio, &zpa) != WALK_NEXT) 1877 return (DCMD_ERR); 1878 1879 return (DCMD_OK); 1880 } 1881 1882 /* 1883 * [addr]::zio_state 1884 * 1885 * Print a summary of all zio_t structures on the system, or for a particular 1886 * pool. This is equivalent to '::walk zio_root | ::zio'. 1887 */ 1888 /*ARGSUSED*/ 1889 static int 1890 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1891 { 1892 /* 1893 * MDB will remember the last address of the pipeline, so if we don't 1894 * zero this we'll end up trying to walk zio structures for a 1895 * non-existent spa_t. 1896 */ 1897 if (!(flags & DCMD_ADDRSPEC)) 1898 addr = 0; 1899 1900 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 1901 } 1902 1903 typedef struct txg_list_walk_data { 1904 uintptr_t lw_head[TXG_SIZE]; 1905 int lw_txgoff; 1906 int lw_maxoff; 1907 size_t lw_offset; 1908 void *lw_obj; 1909 } txg_list_walk_data_t; 1910 1911 static int 1912 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 1913 { 1914 txg_list_walk_data_t *lwd; 1915 txg_list_t list; 1916 int i; 1917 1918 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 1919 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 1920 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 1921 return (WALK_ERR); 1922 } 1923 1924 for (i = 0; i < TXG_SIZE; i++) 1925 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 1926 lwd->lw_offset = list.tl_offset; 1927 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 1928 UM_SLEEP | UM_GC); 1929 lwd->lw_txgoff = txg; 1930 lwd->lw_maxoff = maxoff; 1931 1932 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1933 wsp->walk_data = lwd; 1934 1935 return (WALK_NEXT); 1936 } 1937 1938 static int 1939 txg_list_walk_init(mdb_walk_state_t *wsp) 1940 { 1941 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 1942 } 1943 1944 static int 1945 txg_list0_walk_init(mdb_walk_state_t *wsp) 1946 { 1947 return (txg_list_walk_init_common(wsp, 0, 0)); 1948 } 1949 1950 static int 1951 txg_list1_walk_init(mdb_walk_state_t *wsp) 1952 { 1953 return (txg_list_walk_init_common(wsp, 1, 1)); 1954 } 1955 1956 static int 1957 txg_list2_walk_init(mdb_walk_state_t *wsp) 1958 { 1959 return (txg_list_walk_init_common(wsp, 2, 2)); 1960 } 1961 1962 static int 1963 txg_list3_walk_init(mdb_walk_state_t *wsp) 1964 { 1965 return (txg_list_walk_init_common(wsp, 3, 3)); 1966 } 1967 1968 static int 1969 txg_list_walk_step(mdb_walk_state_t *wsp) 1970 { 1971 txg_list_walk_data_t *lwd = wsp->walk_data; 1972 uintptr_t addr; 1973 txg_node_t *node; 1974 int status; 1975 1976 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 1977 lwd->lw_txgoff++; 1978 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1979 } 1980 1981 if (wsp->walk_addr == NULL) 1982 return (WALK_DONE); 1983 1984 addr = wsp->walk_addr - lwd->lw_offset; 1985 1986 if (mdb_vread(lwd->lw_obj, 1987 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 1988 mdb_warn("failed to read list element at %#lx", addr); 1989 return (WALK_ERR); 1990 } 1991 1992 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 1993 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 1994 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 1995 1996 return (status); 1997 } 1998 1999 /* 2000 * ::walk spa 2001 * 2002 * Walk all named spa_t structures in the namespace. This is nothing more than 2003 * a layered avl walk. 2004 */ 2005 static int 2006 spa_walk_init(mdb_walk_state_t *wsp) 2007 { 2008 GElf_Sym sym; 2009 2010 if (wsp->walk_addr != NULL) { 2011 mdb_warn("spa walk only supports global walks\n"); 2012 return (WALK_ERR); 2013 } 2014 2015 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 2016 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 2017 return (WALK_ERR); 2018 } 2019 2020 wsp->walk_addr = (uintptr_t)sym.st_value; 2021 2022 if (mdb_layered_walk("avl", wsp) == -1) { 2023 mdb_warn("failed to walk 'avl'\n"); 2024 return (WALK_ERR); 2025 } 2026 2027 return (WALK_NEXT); 2028 } 2029 2030 static int 2031 spa_walk_step(mdb_walk_state_t *wsp) 2032 { 2033 spa_t spa; 2034 2035 if (mdb_vread(&spa, sizeof (spa), wsp->walk_addr) == -1) { 2036 mdb_warn("failed to read spa_t at %p", wsp->walk_addr); 2037 return (WALK_ERR); 2038 } 2039 2040 return (wsp->walk_callback(wsp->walk_addr, &spa, wsp->walk_cbdata)); 2041 } 2042 2043 /* 2044 * [addr]::walk zio 2045 * 2046 * Walk all active zio_t structures on the system. This is simply a layered 2047 * walk on top of ::walk zio_cache, with the optional ability to limit the 2048 * structures to a particular pool. 2049 */ 2050 static int 2051 zio_walk_init(mdb_walk_state_t *wsp) 2052 { 2053 wsp->walk_data = (void *)wsp->walk_addr; 2054 2055 if (mdb_layered_walk("zio_cache", wsp) == -1) { 2056 mdb_warn("failed to walk 'zio_cache'\n"); 2057 return (WALK_ERR); 2058 } 2059 2060 return (WALK_NEXT); 2061 } 2062 2063 static int 2064 zio_walk_step(mdb_walk_state_t *wsp) 2065 { 2066 zio_t zio; 2067 2068 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 2069 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 2070 return (WALK_ERR); 2071 } 2072 2073 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 2074 return (WALK_NEXT); 2075 2076 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2077 } 2078 2079 /* 2080 * [addr]::walk zio_root 2081 * 2082 * Walk only root zio_t structures, optionally for a particular spa_t. 2083 */ 2084 static int 2085 zio_walk_root_step(mdb_walk_state_t *wsp) 2086 { 2087 zio_t zio; 2088 2089 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) { 2090 mdb_warn("failed to read zio_t at %p", wsp->walk_addr); 2091 return (WALK_ERR); 2092 } 2093 2094 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 2095 return (WALK_NEXT); 2096 2097 /* If the parent list is not empty, ignore */ 2098 if (zio.io_parent_list.list_head.list_next != 2099 &((zio_t *)wsp->walk_addr)->io_parent_list.list_head) 2100 return (WALK_NEXT); 2101 2102 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2103 } 2104 2105 #define NICENUM_BUFLEN 6 2106 2107 static int 2108 snprintfrac(char *buf, int len, 2109 uint64_t numerator, uint64_t denom, int frac_digits) 2110 { 2111 int mul = 1; 2112 int whole, frac, i; 2113 2114 for (i = frac_digits; i; i--) 2115 mul *= 10; 2116 whole = numerator / denom; 2117 frac = mul * numerator / denom - mul * whole; 2118 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); 2119 } 2120 2121 static void 2122 mdb_nicenum(uint64_t num, char *buf) 2123 { 2124 uint64_t n = num; 2125 int index = 0; 2126 char *u; 2127 2128 while (n >= 1024) { 2129 n = (n + (1024 / 2)) / 1024; /* Round up or down */ 2130 index++; 2131 } 2132 2133 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; 2134 2135 if (index == 0) { 2136 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", 2137 (u_longlong_t)n); 2138 } else if (n < 10 && (num & (num - 1)) != 0) { 2139 (void) snprintfrac(buf, NICENUM_BUFLEN, 2140 num, 1ULL << 10 * index, 2); 2141 strcat(buf, u); 2142 } else if (n < 100 && (num & (num - 1)) != 0) { 2143 (void) snprintfrac(buf, NICENUM_BUFLEN, 2144 num, 1ULL << 10 * index, 1); 2145 strcat(buf, u); 2146 } else { 2147 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", 2148 (u_longlong_t)n, u); 2149 } 2150 } 2151 2152 /* 2153 * ::zfs_blkstats 2154 * 2155 * -v print verbose per-level information 2156 * 2157 */ 2158 static int 2159 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2160 { 2161 boolean_t verbose = B_FALSE; 2162 zfs_all_blkstats_t stats; 2163 dmu_object_type_t t; 2164 zfs_blkstat_t *tzb; 2165 uint64_t ditto; 2166 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; 2167 /* +10 in case it grew */ 2168 2169 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { 2170 mdb_warn("failed to read 'dmu_ot'"); 2171 return (DCMD_ERR); 2172 } 2173 2174 if (mdb_getopts(argc, argv, 2175 'v', MDB_OPT_SETBITS, TRUE, &verbose, 2176 NULL) != argc) 2177 return (DCMD_USAGE); 2178 2179 if (!(flags & DCMD_ADDRSPEC)) 2180 return (DCMD_USAGE); 2181 2182 if (GETMEMB(addr, struct spa, spa_dsl_pool, addr) || 2183 GETMEMB(addr, struct dsl_pool, dp_blkstats, addr) || 2184 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 2185 mdb_warn("failed to read data at %p;", addr); 2186 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 2187 return (DCMD_ERR); 2188 } 2189 2190 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 2191 if (tzb->zb_gangs != 0) { 2192 mdb_printf("Ganged blocks: %llu\n", 2193 (longlong_t)tzb->zb_gangs); 2194 } 2195 2196 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 2197 tzb->zb_ditto_3_of_3_samevdev; 2198 if (ditto != 0) { 2199 mdb_printf("Dittoed blocks on same vdev: %llu\n", 2200 (longlong_t)ditto); 2201 } 2202 2203 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 2204 "\t avg\t comp\t%%Total\tType\n"); 2205 2206 for (t = 0; t <= DMU_OT_TOTAL; t++) { 2207 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; 2208 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; 2209 char avg[NICENUM_BUFLEN]; 2210 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; 2211 char typename[64]; 2212 int l; 2213 2214 2215 if (t == DMU_OT_DEFERRED) 2216 strcpy(typename, "deferred free"); 2217 else if (t == DMU_OT_OTHER) 2218 strcpy(typename, "other"); 2219 else if (t == DMU_OT_TOTAL) 2220 strcpy(typename, "Total"); 2221 else if (mdb_readstr(typename, sizeof (typename), 2222 (uintptr_t)dmu_ot[t].ot_name) == -1) { 2223 mdb_warn("failed to read type name"); 2224 return (DCMD_ERR); 2225 } 2226 2227 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 2228 continue; 2229 2230 for (l = -1; l < DN_MAX_LEVELS; l++) { 2231 int level = (l == -1 ? DN_MAX_LEVELS : l); 2232 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 2233 2234 if (zb->zb_asize == 0) 2235 continue; 2236 2237 /* 2238 * Don't print each level unless requested. 2239 */ 2240 if (!verbose && level != DN_MAX_LEVELS) 2241 continue; 2242 2243 /* 2244 * If all the space is level 0, don't print the 2245 * level 0 separately. 2246 */ 2247 if (level == 0 && zb->zb_asize == 2248 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 2249 continue; 2250 2251 mdb_nicenum(zb->zb_count, csize); 2252 mdb_nicenum(zb->zb_lsize, lsize); 2253 mdb_nicenum(zb->zb_psize, psize); 2254 mdb_nicenum(zb->zb_asize, asize); 2255 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 2256 (void) snprintfrac(comp, NICENUM_BUFLEN, 2257 zb->zb_lsize, zb->zb_psize, 2); 2258 (void) snprintfrac(pct, NICENUM_BUFLEN, 2259 100 * zb->zb_asize, tzb->zb_asize, 2); 2260 2261 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 2262 "\t%5s\t%6s\t", 2263 csize, lsize, psize, asize, avg, comp, pct); 2264 2265 if (level == DN_MAX_LEVELS) 2266 mdb_printf("%s\n", typename); 2267 else 2268 mdb_printf(" L%d %s\n", 2269 level, typename); 2270 } 2271 } 2272 2273 return (DCMD_OK); 2274 } 2275 2276 /* ARGSUSED */ 2277 static int 2278 reference_cb(uintptr_t addr, const void *ignored, void *arg) 2279 { 2280 static int gotid; 2281 static mdb_ctf_id_t ref_id; 2282 uintptr_t ref_holder; 2283 uintptr_t ref_removed; 2284 uint64_t ref_number; 2285 boolean_t holder_is_str = B_FALSE; 2286 char holder_str[128]; 2287 boolean_t removed = (boolean_t)arg; 2288 2289 if (!gotid) { 2290 if (mdb_ctf_lookup_by_name("struct reference", &ref_id) == -1) { 2291 mdb_warn("couldn't find struct reference"); 2292 return (WALK_ERR); 2293 } 2294 gotid = TRUE; 2295 } 2296 2297 if (GETMEMBID(addr, &ref_id, ref_holder, ref_holder) || 2298 GETMEMBID(addr, &ref_id, ref_removed, ref_removed) || 2299 GETMEMBID(addr, &ref_id, ref_number, ref_number)) 2300 return (WALK_ERR); 2301 2302 if (mdb_readstr(holder_str, sizeof (holder_str), ref_holder) != -1) 2303 holder_is_str = strisprint(holder_str); 2304 2305 if (removed) 2306 mdb_printf("removed "); 2307 mdb_printf("reference "); 2308 if (ref_number != 1) 2309 mdb_printf("with count=%llu ", ref_number); 2310 mdb_printf("with tag %p", (void*)ref_holder); 2311 if (holder_is_str) 2312 mdb_printf(" \"%s\"", holder_str); 2313 mdb_printf(", held at:\n"); 2314 2315 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 2316 2317 if (removed) { 2318 mdb_printf("removed at:\n"); 2319 (void) mdb_call_dcmd("whatis", ref_removed, 2320 DCMD_ADDRSPEC, 0, NULL); 2321 } 2322 2323 mdb_printf("\n"); 2324 2325 return (WALK_NEXT); 2326 } 2327 2328 /* ARGSUSED */ 2329 static int 2330 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2331 { 2332 uint64_t rc_count, rc_removed_count; 2333 uintptr_t rc_list, rc_removed; 2334 static int gotid; 2335 static mdb_ctf_id_t rc_id; 2336 ulong_t off; 2337 2338 if (!(flags & DCMD_ADDRSPEC)) 2339 return (DCMD_USAGE); 2340 2341 if (!gotid) { 2342 /* 2343 * The refcount structure is different when compiled debug 2344 * vs nondebug. Therefore, we want to make sure we get the 2345 * refcount definition from the ZFS module, in case it has 2346 * been compiled debug but genunix is nondebug. 2347 */ 2348 if (mdb_ctf_lookup_by_name("struct " ZFS_OBJ_NAME "`refcount", 2349 &rc_id) == -1) { 2350 mdb_warn("couldn't find struct refcount"); 2351 return (DCMD_ERR); 2352 } 2353 gotid = TRUE; 2354 } 2355 2356 if (GETMEMBID(addr, &rc_id, rc_count, rc_count) || 2357 GETMEMBID(addr, &rc_id, rc_removed_count, rc_removed_count)) 2358 return (DCMD_ERR); 2359 2360 mdb_printf("refcount_t at %p has %llu current holds, " 2361 "%llu recently released holds\n", 2362 addr, (longlong_t)rc_count, (longlong_t)rc_removed_count); 2363 2364 if (rc_count > 0) 2365 mdb_printf("current holds:\n"); 2366 if (mdb_ctf_offsetof(rc_id, "rc_list", &off) == -1) 2367 return (DCMD_ERR); 2368 rc_list = addr + off/NBBY; 2369 mdb_pwalk("list", reference_cb, (void*)B_FALSE, rc_list); 2370 2371 if (rc_removed_count > 0) 2372 mdb_printf("released holds:\n"); 2373 if (mdb_ctf_offsetof(rc_id, "rc_removed", &off) == -1) 2374 return (DCMD_ERR); 2375 rc_removed = addr + off/NBBY; 2376 mdb_pwalk("list", reference_cb, (void*)B_TRUE, rc_removed); 2377 2378 return (DCMD_OK); 2379 } 2380 2381 /* ARGSUSED */ 2382 static int 2383 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2384 { 2385 sa_attr_table_t *table; 2386 sa_os_t sa_os; 2387 char *name; 2388 int i; 2389 2390 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 2391 mdb_warn("failed to read sa_os at %p", addr); 2392 return (DCMD_ERR); 2393 } 2394 2395 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2396 UM_SLEEP | UM_GC); 2397 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 2398 2399 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2400 (uintptr_t)sa_os.sa_attr_table) == -1) { 2401 mdb_warn("failed to read sa_os at %p", addr); 2402 return (DCMD_ERR); 2403 } 2404 2405 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 2406 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 2407 for (i = 0; i != sa_os.sa_num_attrs; i++) { 2408 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 2409 mdb_printf("%5x %8x %8x %8x %-s\n", 2410 (int)table[i].sa_attr, (int)table[i].sa_registered, 2411 (int)table[i].sa_length, table[i].sa_byteswap, name); 2412 } 2413 2414 return (DCMD_OK); 2415 } 2416 2417 static int 2418 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 2419 { 2420 uintptr_t idx_table; 2421 2422 if (GETMEMB(addr, struct sa_idx_tab, sa_idx_tab, idx_table)) { 2423 mdb_printf("can't find offset table in sa_idx_tab\n"); 2424 return (-1); 2425 } 2426 2427 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 2428 UM_SLEEP | UM_GC); 2429 2430 if (mdb_vread(*off_tab, 2431 attr_count * sizeof (uint32_t), idx_table) == -1) { 2432 mdb_warn("failed to attribute offset table %p", idx_table); 2433 return (-1); 2434 } 2435 2436 return (DCMD_OK); 2437 } 2438 2439 /*ARGSUSED*/ 2440 static int 2441 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2442 { 2443 uint32_t *offset_tab; 2444 int attr_count; 2445 uint64_t attr_id; 2446 uintptr_t attr_addr; 2447 uintptr_t bonus_tab, spill_tab; 2448 uintptr_t db_bonus, db_spill; 2449 uintptr_t os, os_sa; 2450 uintptr_t db_data; 2451 2452 if (argc != 1) 2453 return (DCMD_USAGE); 2454 2455 if (argv[0].a_type == MDB_TYPE_STRING) 2456 attr_id = mdb_strtoull(argv[0].a_un.a_str); 2457 else 2458 return (DCMD_USAGE); 2459 2460 if (GETMEMB(addr, struct sa_handle, sa_bonus_tab, bonus_tab) || 2461 GETMEMB(addr, struct sa_handle, sa_spill_tab, spill_tab) || 2462 GETMEMB(addr, struct sa_handle, sa_os, os) || 2463 GETMEMB(addr, struct sa_handle, sa_bonus, db_bonus) || 2464 GETMEMB(addr, struct sa_handle, sa_spill, db_spill)) { 2465 mdb_printf("Can't find necessary information in sa_handle " 2466 "in sa_handle\n"); 2467 return (DCMD_ERR); 2468 } 2469 2470 if (GETMEMB(os, struct objset, os_sa, os_sa)) { 2471 mdb_printf("Can't find os_sa in objset\n"); 2472 return (DCMD_ERR); 2473 } 2474 2475 if (GETMEMB(os_sa, struct sa_os, sa_num_attrs, attr_count)) { 2476 mdb_printf("Can't find sa_num_attrs\n"); 2477 return (DCMD_ERR); 2478 } 2479 2480 if (attr_id > attr_count) { 2481 mdb_printf("attribute id number is out of range\n"); 2482 return (DCMD_ERR); 2483 } 2484 2485 if (bonus_tab) { 2486 if (sa_get_off_table(bonus_tab, &offset_tab, 2487 attr_count) == -1) { 2488 return (DCMD_ERR); 2489 } 2490 2491 if (GETMEMB(db_bonus, struct dmu_buf, db_data, db_data)) { 2492 mdb_printf("can't find db_data in bonus dbuf\n"); 2493 return (DCMD_ERR); 2494 } 2495 } 2496 2497 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 2498 spill_tab == NULL) { 2499 mdb_printf("Attribute does not exist\n"); 2500 return (DCMD_ERR); 2501 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 2502 if (sa_get_off_table(spill_tab, &offset_tab, 2503 attr_count) == -1) { 2504 return (DCMD_ERR); 2505 } 2506 if (GETMEMB(db_spill, struct dmu_buf, db_data, db_data)) { 2507 mdb_printf("can't find db_data in spill dbuf\n"); 2508 return (DCMD_ERR); 2509 } 2510 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 2511 mdb_printf("Attribute does not exist\n"); 2512 return (DCMD_ERR); 2513 } 2514 } 2515 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 2516 mdb_printf("%p\n", attr_addr); 2517 return (DCMD_OK); 2518 } 2519 2520 /* ARGSUSED */ 2521 static int 2522 zfs_ace_print_common(uintptr_t addr, uint_t flags, 2523 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 2524 uint16_t ace_type, int verbose) 2525 { 2526 if (DCMD_HDRSPEC(flags) && !verbose) 2527 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 2528 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 2529 2530 if (!verbose) { 2531 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 2532 ace_flags, access_mask, ace_type, id); 2533 return (DCMD_OK); 2534 } 2535 2536 switch (ace_flags & ACE_TYPE_FLAGS) { 2537 case ACE_OWNER: 2538 mdb_printf("owner@:"); 2539 break; 2540 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2541 mdb_printf("group@:"); 2542 break; 2543 case ACE_EVERYONE: 2544 mdb_printf("everyone@:"); 2545 break; 2546 case ACE_IDENTIFIER_GROUP: 2547 mdb_printf("group:%llx:", (u_longlong_t)id); 2548 break; 2549 case 0: /* User entry */ 2550 mdb_printf("user:%llx:", (u_longlong_t)id); 2551 break; 2552 } 2553 2554 /* print out permission mask */ 2555 if (access_mask & ACE_READ_DATA) 2556 mdb_printf("r"); 2557 else 2558 mdb_printf("-"); 2559 if (access_mask & ACE_WRITE_DATA) 2560 mdb_printf("w"); 2561 else 2562 mdb_printf("-"); 2563 if (access_mask & ACE_EXECUTE) 2564 mdb_printf("x"); 2565 else 2566 mdb_printf("-"); 2567 if (access_mask & ACE_APPEND_DATA) 2568 mdb_printf("p"); 2569 else 2570 mdb_printf("-"); 2571 if (access_mask & ACE_DELETE) 2572 mdb_printf("d"); 2573 else 2574 mdb_printf("-"); 2575 if (access_mask & ACE_DELETE_CHILD) 2576 mdb_printf("D"); 2577 else 2578 mdb_printf("-"); 2579 if (access_mask & ACE_READ_ATTRIBUTES) 2580 mdb_printf("a"); 2581 else 2582 mdb_printf("-"); 2583 if (access_mask & ACE_WRITE_ATTRIBUTES) 2584 mdb_printf("A"); 2585 else 2586 mdb_printf("-"); 2587 if (access_mask & ACE_READ_NAMED_ATTRS) 2588 mdb_printf("R"); 2589 else 2590 mdb_printf("-"); 2591 if (access_mask & ACE_WRITE_NAMED_ATTRS) 2592 mdb_printf("W"); 2593 else 2594 mdb_printf("-"); 2595 if (access_mask & ACE_READ_ACL) 2596 mdb_printf("c"); 2597 else 2598 mdb_printf("-"); 2599 if (access_mask & ACE_WRITE_ACL) 2600 mdb_printf("C"); 2601 else 2602 mdb_printf("-"); 2603 if (access_mask & ACE_WRITE_OWNER) 2604 mdb_printf("o"); 2605 else 2606 mdb_printf("-"); 2607 if (access_mask & ACE_SYNCHRONIZE) 2608 mdb_printf("s"); 2609 else 2610 mdb_printf("-"); 2611 2612 mdb_printf(":"); 2613 2614 /* Print out inheritance flags */ 2615 if (ace_flags & ACE_FILE_INHERIT_ACE) 2616 mdb_printf("f"); 2617 else 2618 mdb_printf("-"); 2619 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 2620 mdb_printf("d"); 2621 else 2622 mdb_printf("-"); 2623 if (ace_flags & ACE_INHERIT_ONLY_ACE) 2624 mdb_printf("i"); 2625 else 2626 mdb_printf("-"); 2627 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 2628 mdb_printf("n"); 2629 else 2630 mdb_printf("-"); 2631 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 2632 mdb_printf("S"); 2633 else 2634 mdb_printf("-"); 2635 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 2636 mdb_printf("F"); 2637 else 2638 mdb_printf("-"); 2639 if (ace_flags & ACE_INHERITED_ACE) 2640 mdb_printf("I"); 2641 else 2642 mdb_printf("-"); 2643 2644 switch (ace_type) { 2645 case ACE_ACCESS_ALLOWED_ACE_TYPE: 2646 mdb_printf(":allow\n"); 2647 break; 2648 case ACE_ACCESS_DENIED_ACE_TYPE: 2649 mdb_printf(":deny\n"); 2650 break; 2651 case ACE_SYSTEM_AUDIT_ACE_TYPE: 2652 mdb_printf(":audit\n"); 2653 break; 2654 case ACE_SYSTEM_ALARM_ACE_TYPE: 2655 mdb_printf(":alarm\n"); 2656 break; 2657 default: 2658 mdb_printf(":?\n"); 2659 } 2660 return (DCMD_OK); 2661 } 2662 2663 /* ARGSUSED */ 2664 static int 2665 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2666 { 2667 zfs_ace_t zace; 2668 int verbose = FALSE; 2669 uint64_t id; 2670 2671 if (!(flags & DCMD_ADDRSPEC)) 2672 return (DCMD_USAGE); 2673 2674 if (mdb_getopts(argc, argv, 2675 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2676 return (DCMD_USAGE); 2677 2678 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 2679 mdb_warn("failed to read zfs_ace_t"); 2680 return (DCMD_ERR); 2681 } 2682 2683 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 2684 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2685 id = zace.z_fuid; 2686 else 2687 id = -1; 2688 2689 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 2690 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 2691 } 2692 2693 /* ARGSUSED */ 2694 static int 2695 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2696 { 2697 ace_t ace; 2698 uint64_t id; 2699 int verbose = FALSE; 2700 2701 if (!(flags & DCMD_ADDRSPEC)) 2702 return (DCMD_USAGE); 2703 2704 if (mdb_getopts(argc, argv, 2705 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2706 return (DCMD_USAGE); 2707 2708 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 2709 mdb_warn("failed to read ace_t"); 2710 return (DCMD_ERR); 2711 } 2712 2713 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 2714 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2715 id = ace.a_who; 2716 else 2717 id = -1; 2718 2719 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 2720 ace.a_flags, ace.a_type, verbose)); 2721 } 2722 2723 typedef struct acl_dump_args { 2724 int a_argc; 2725 const mdb_arg_t *a_argv; 2726 uint16_t a_version; 2727 int a_flags; 2728 } acl_dump_args_t; 2729 2730 /* ARGSUSED */ 2731 static int 2732 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 2733 { 2734 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2735 2736 if (acl_args->a_version == 1) { 2737 if (mdb_call_dcmd("zfs_ace", addr, 2738 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2739 acl_args->a_argv) != DCMD_OK) { 2740 return (WALK_ERR); 2741 } 2742 } else { 2743 if (mdb_call_dcmd("zfs_ace0", addr, 2744 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2745 acl_args->a_argv) != DCMD_OK) { 2746 return (WALK_ERR); 2747 } 2748 } 2749 acl_args->a_flags = DCMD_LOOP; 2750 return (WALK_NEXT); 2751 } 2752 2753 /* ARGSUSED */ 2754 static int 2755 acl_cb(uintptr_t addr, const void *unknown, void *arg) 2756 { 2757 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2758 2759 if (acl_args->a_version == 1) { 2760 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 2761 arg, addr) != 0) { 2762 mdb_warn("can't walk ACEs"); 2763 return (DCMD_ERR); 2764 } 2765 } else { 2766 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 2767 arg, addr) != 0) { 2768 mdb_warn("can't walk ACEs"); 2769 return (DCMD_ERR); 2770 } 2771 } 2772 return (WALK_NEXT); 2773 } 2774 2775 /* ARGSUSED */ 2776 static int 2777 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2778 { 2779 zfs_acl_t zacl; 2780 int verbose = FALSE; 2781 acl_dump_args_t acl_args; 2782 2783 if (!(flags & DCMD_ADDRSPEC)) 2784 return (DCMD_USAGE); 2785 2786 if (mdb_getopts(argc, argv, 2787 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2788 return (DCMD_USAGE); 2789 2790 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 2791 mdb_warn("failed to read zfs_acl_t"); 2792 return (DCMD_ERR); 2793 } 2794 2795 acl_args.a_argc = argc; 2796 acl_args.a_argv = argv; 2797 acl_args.a_version = zacl.z_version; 2798 acl_args.a_flags = DCMD_LOOPFIRST; 2799 2800 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 2801 mdb_warn("can't walk ACL"); 2802 return (DCMD_ERR); 2803 } 2804 2805 return (DCMD_OK); 2806 } 2807 2808 /* ARGSUSED */ 2809 static int 2810 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 2811 { 2812 if (wsp->walk_addr == NULL) { 2813 mdb_warn("must supply address of zfs_acl_node_t\n"); 2814 return (WALK_ERR); 2815 } 2816 2817 wsp->walk_addr += OFFSETOF(zfs_acl_t, z_acl); 2818 2819 if (mdb_layered_walk("list", wsp) == -1) { 2820 mdb_warn("failed to walk 'list'\n"); 2821 return (WALK_ERR); 2822 } 2823 2824 return (WALK_NEXT); 2825 } 2826 2827 static int 2828 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 2829 { 2830 zfs_acl_node_t aclnode; 2831 2832 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 2833 wsp->walk_addr) == -1) { 2834 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 2835 return (WALK_ERR); 2836 } 2837 2838 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 2839 } 2840 2841 typedef struct ace_walk_data { 2842 int ace_count; 2843 int ace_version; 2844 } ace_walk_data_t; 2845 2846 static int 2847 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 2848 int ace_count, uintptr_t ace_data) 2849 { 2850 ace_walk_data_t *ace_walk_data; 2851 2852 if (wsp->walk_addr == NULL) { 2853 mdb_warn("must supply address of zfs_acl_node_t\n"); 2854 return (WALK_ERR); 2855 } 2856 2857 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 2858 2859 ace_walk_data->ace_count = ace_count; 2860 ace_walk_data->ace_version = version; 2861 2862 wsp->walk_addr = ace_data; 2863 wsp->walk_data = ace_walk_data; 2864 2865 return (WALK_NEXT); 2866 } 2867 2868 static int 2869 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 2870 { 2871 static int gotid; 2872 static mdb_ctf_id_t acl_id; 2873 int z_ace_count; 2874 uintptr_t z_acldata; 2875 2876 if (!gotid) { 2877 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 2878 &acl_id) == -1) { 2879 mdb_warn("couldn't find struct zfs_acl_node"); 2880 return (DCMD_ERR); 2881 } 2882 gotid = TRUE; 2883 } 2884 2885 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 2886 return (DCMD_ERR); 2887 } 2888 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 2889 return (DCMD_ERR); 2890 } 2891 2892 return (zfs_aces_walk_init_common(wsp, version, 2893 z_ace_count, z_acldata)); 2894 } 2895 2896 /* ARGSUSED */ 2897 static int 2898 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 2899 { 2900 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 2901 } 2902 2903 /* ARGSUSED */ 2904 static int 2905 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 2906 { 2907 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 2908 } 2909 2910 static int 2911 zfs_aces_walk_step(mdb_walk_state_t *wsp) 2912 { 2913 ace_walk_data_t *ace_data = wsp->walk_data; 2914 zfs_ace_t zace; 2915 ace_t *acep; 2916 int status; 2917 int entry_type; 2918 int allow_type; 2919 uintptr_t ptr; 2920 2921 if (ace_data->ace_count == 0) 2922 return (WALK_DONE); 2923 2924 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 2925 mdb_warn("failed to read zfs_ace_t at %#lx", 2926 wsp->walk_addr); 2927 return (WALK_ERR); 2928 } 2929 2930 switch (ace_data->ace_version) { 2931 case 0: 2932 acep = (ace_t *)&zace; 2933 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 2934 allow_type = acep->a_type; 2935 break; 2936 case 1: 2937 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 2938 allow_type = zace.z_hdr.z_type; 2939 break; 2940 default: 2941 return (WALK_ERR); 2942 } 2943 2944 ptr = (uintptr_t)wsp->walk_addr; 2945 switch (entry_type) { 2946 case ACE_OWNER: 2947 case ACE_EVERYONE: 2948 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2949 ptr += ace_data->ace_version == 0 ? 2950 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 2951 break; 2952 case ACE_IDENTIFIER_GROUP: 2953 default: 2954 switch (allow_type) { 2955 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 2956 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 2957 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 2958 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 2959 ptr += ace_data->ace_version == 0 ? 2960 sizeof (ace_t) : sizeof (zfs_object_ace_t); 2961 break; 2962 default: 2963 ptr += ace_data->ace_version == 0 ? 2964 sizeof (ace_t) : sizeof (zfs_ace_t); 2965 break; 2966 } 2967 } 2968 2969 ace_data->ace_count--; 2970 status = wsp->walk_callback(wsp->walk_addr, 2971 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 2972 2973 wsp->walk_addr = ptr; 2974 return (status); 2975 } 2976 2977 /* 2978 * MDB module linkage information: 2979 * 2980 * We declare a list of structures describing our dcmds, and a function 2981 * named _mdb_init to return a pointer to our module information. 2982 */ 2983 2984 static const mdb_dcmd_t dcmds[] = { 2985 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 2986 { "blkptr", ":", "print blkptr_t", blkptr }, 2987 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 2988 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 2989 { "dbufs", 2990 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 2991 "[-o object | \"mdn\"] \n" 2992 "\t[-l level] [-b blkid | \"bonus\"]", 2993 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 2994 { "abuf_find", "dva_word[0] dva_word[1]", 2995 "find arc_buf_hdr_t of a specified DVA", 2996 abuf_find }, 2997 { "spa", "?[-cv]", "spa_t summary", spa_print }, 2998 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 2999 { "spa_verify", ":", "verify spa_t consistency", spa_verify }, 3000 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 3001 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs }, 3002 { "vdev", ":[-re]\n" 3003 "\t-r display recursively\n" 3004 "\t-e print statistics", 3005 "vdev_t summary", vdev_print }, 3006 { "zio", ":[cpr]\n" 3007 "\t-c display children\n" 3008 "\t-p display parents\n" 3009 "\t-r display recursively", 3010 "zio_t summary", zio_print }, 3011 { "zio_state", "?", "print out all zio_t structures on system or " 3012 "for a particular pool", zio_state }, 3013 { "zfs_blkstats", ":[-v]", 3014 "given a spa_t, print block type stats from last scrub", 3015 zfs_blkstats }, 3016 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 3017 { "refcount", "", "print refcount_t holders", refcount }, 3018 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 3019 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 3020 zfs_acl_dump }, 3021 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 3022 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 3023 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 3024 sa_attr_table}, 3025 { "sa_attr", ": attr_id", 3026 "print SA attribute address when given sa_handle_t", sa_attr_print}, 3027 { "zfs_dbgmsg", ":[-v]", 3028 "print zfs debug log", dbgmsg}, 3029 { NULL } 3030 }; 3031 3032 static const mdb_walker_t walkers[] = { 3033 { "zms_freelist", "walk ZFS metaslab freelist", 3034 freelist_walk_init, freelist_walk_step, NULL }, 3035 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 3036 txg_list_walk_init, txg_list_walk_step, NULL }, 3037 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 3038 txg_list0_walk_init, txg_list_walk_step, NULL }, 3039 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 3040 txg_list1_walk_init, txg_list_walk_step, NULL }, 3041 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 3042 txg_list2_walk_init, txg_list_walk_step, NULL }, 3043 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 3044 txg_list3_walk_init, txg_list_walk_step, NULL }, 3045 { "zio", "walk all zio structures, optionally for a particular spa_t", 3046 zio_walk_init, zio_walk_step, NULL }, 3047 { "zio_root", "walk all root zio_t structures, optionally for a " 3048 "particular spa_t", 3049 zio_walk_init, zio_walk_root_step, NULL }, 3050 { "spa", "walk all spa_t entries in the namespace", 3051 spa_walk_init, spa_walk_step, NULL }, 3052 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 3053 metaslab_walk_init, metaslab_walk_step, NULL }, 3054 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 3055 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 3056 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 3057 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 3058 { "zfs_acl_node_aces0", 3059 "given a zfs_acl_node_t, walk all ACEs as ace_t", 3060 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 3061 { NULL } 3062 }; 3063 3064 static const mdb_modinfo_t modinfo = { 3065 MDB_API_VERSION, dcmds, walkers 3066 }; 3067 3068 const mdb_modinfo_t * 3069 _mdb_init(void) 3070 { 3071 return (&modinfo); 3072 } 3073