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) 2013 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 extern int64_t mdb_gethrtime(void); 50 #else 51 #define ZFS_OBJ_NAME "libzpool.so.1" 52 #endif 53 54 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`" 55 56 #ifndef _KERNEL 57 int aok; 58 #endif 59 60 static int 61 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 62 const char *member, int len, void *buf) 63 { 64 mdb_ctf_id_t id; 65 ulong_t off; 66 char name[64]; 67 68 if (idp == NULL) { 69 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 70 mdb_warn("couldn't find type %s", type); 71 return (DCMD_ERR); 72 } 73 idp = &id; 74 } else { 75 type = name; 76 mdb_ctf_type_name(*idp, name, sizeof (name)); 77 } 78 79 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 80 mdb_warn("couldn't find member %s of type %s\n", member, type); 81 return (DCMD_ERR); 82 } 83 if (off % 8 != 0) { 84 mdb_warn("member %s of type %s is unsupported bitfield", 85 member, type); 86 return (DCMD_ERR); 87 } 88 off /= 8; 89 90 if (mdb_vread(buf, len, addr + off) == -1) { 91 mdb_warn("failed to read %s from %s at %p", 92 member, type, addr + off); 93 return (DCMD_ERR); 94 } 95 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 96 97 return (0); 98 } 99 100 #define GETMEMB(addr, structname, member, dest) \ 101 getmember(addr, ZFS_STRUCT structname, NULL, #member, \ 102 sizeof (dest), &(dest)) 103 104 #define GETMEMBID(addr, ctfid, member, dest) \ 105 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 106 107 static boolean_t 108 strisprint(const char *cp) 109 { 110 for (; *cp; cp++) { 111 if (!isprint(*cp)) 112 return (B_FALSE); 113 } 114 return (B_TRUE); 115 } 116 117 static int verbose; 118 119 static int 120 freelist_walk_init(mdb_walk_state_t *wsp) 121 { 122 if (wsp->walk_addr == NULL) { 123 mdb_warn("must supply starting address\n"); 124 return (WALK_ERR); 125 } 126 127 wsp->walk_data = 0; /* Index into the freelist */ 128 return (WALK_NEXT); 129 } 130 131 static int 132 freelist_walk_step(mdb_walk_state_t *wsp) 133 { 134 uint64_t entry; 135 uintptr_t number = (uintptr_t)wsp->walk_data; 136 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID", 137 "INVALID", "INVALID", "INVALID", "INVALID" }; 138 int mapshift = SPA_MINBLOCKSHIFT; 139 140 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) { 141 mdb_warn("failed to read freelist entry %p", wsp->walk_addr); 142 return (WALK_DONE); 143 } 144 wsp->walk_addr += sizeof (entry); 145 wsp->walk_data = (void *)(number + 1); 146 147 if (SM_DEBUG_DECODE(entry)) { 148 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n", 149 number, 150 ddata[SM_DEBUG_ACTION_DECODE(entry)], 151 SM_DEBUG_TXG_DECODE(entry), 152 SM_DEBUG_SYNCPASS_DECODE(entry)); 153 } else { 154 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c " 155 "size=%06llx", number, 156 SM_OFFSET_DECODE(entry) << mapshift, 157 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) << 158 mapshift, 159 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F', 160 SM_RUN_DECODE(entry) << mapshift); 161 if (verbose) 162 mdb_printf(" (raw=%012llx)\n", entry); 163 mdb_printf("\n"); 164 } 165 return (WALK_NEXT); 166 } 167 168 static int 169 mdb_dsl_dir_name(uintptr_t addr, char *buf) 170 { 171 static int gotid; 172 static mdb_ctf_id_t dd_id; 173 uintptr_t dd_parent; 174 char dd_myname[MAXNAMELEN]; 175 176 if (!gotid) { 177 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir", 178 &dd_id) == -1) { 179 mdb_warn("couldn't find struct dsl_dir"); 180 return (DCMD_ERR); 181 } 182 gotid = TRUE; 183 } 184 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 185 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 186 return (DCMD_ERR); 187 } 188 189 if (dd_parent) { 190 if (mdb_dsl_dir_name(dd_parent, buf)) 191 return (DCMD_ERR); 192 strcat(buf, "/"); 193 } 194 195 if (dd_myname[0]) 196 strcat(buf, dd_myname); 197 else 198 strcat(buf, "???"); 199 200 return (0); 201 } 202 203 static int 204 objset_name(uintptr_t addr, char *buf) 205 { 206 static int gotid; 207 static mdb_ctf_id_t os_id, ds_id; 208 uintptr_t os_dsl_dataset; 209 char ds_snapname[MAXNAMELEN]; 210 uintptr_t ds_dir; 211 212 buf[0] = '\0'; 213 214 if (!gotid) { 215 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset", 216 &os_id) == -1) { 217 mdb_warn("couldn't find struct objset"); 218 return (DCMD_ERR); 219 } 220 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset", 221 &ds_id) == -1) { 222 mdb_warn("couldn't find struct dsl_dataset"); 223 return (DCMD_ERR); 224 } 225 226 gotid = TRUE; 227 } 228 229 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset)) 230 return (DCMD_ERR); 231 232 if (os_dsl_dataset == 0) { 233 strcat(buf, "mos"); 234 return (0); 235 } 236 237 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 238 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 239 return (DCMD_ERR); 240 } 241 242 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf)) 243 return (DCMD_ERR); 244 245 if (ds_snapname[0]) { 246 strcat(buf, "@"); 247 strcat(buf, ds_snapname); 248 } 249 return (0); 250 } 251 252 static void 253 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val, 254 const char *prefix) 255 { 256 const char *cp; 257 size_t len = strlen(prefix); 258 259 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) { 260 if (strncmp(cp, prefix, len) == 0) 261 cp += len; 262 (void) strncpy(out, cp, size); 263 } else { 264 mdb_snprintf(out, size, "? (%d)", val); 265 } 266 } 267 268 /* ARGSUSED */ 269 static int 270 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 271 { 272 /* 273 * This table can be approximately generated by running: 274 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 275 */ 276 static const char *params[] = { 277 "arc_reduce_dnlc_percent", 278 "zfs_arc_max", 279 "zfs_arc_min", 280 "arc_shrink_shift", 281 "zfs_mdcomp_disable", 282 "zfs_prefetch_disable", 283 "zfetch_max_streams", 284 "zfetch_min_sec_reap", 285 "zfetch_block_cap", 286 "zfetch_array_rd_sz", 287 "zfs_default_bs", 288 "zfs_default_ibs", 289 "metaslab_aliquot", 290 "reference_tracking_enable", 291 "reference_history", 292 "spa_max_replication_override", 293 "spa_mode_global", 294 "zfs_flags", 295 "zfs_txg_synctime_ms", 296 "zfs_txg_timeout", 297 "zfs_write_limit_min", 298 "zfs_write_limit_max", 299 "zfs_write_limit_shift", 300 "zfs_write_limit_override", 301 "zfs_no_write_throttle", 302 "zfs_vdev_cache_max", 303 "zfs_vdev_cache_size", 304 "zfs_vdev_cache_bshift", 305 "vdev_mirror_shift", 306 "zfs_vdev_max_pending", 307 "zfs_vdev_min_pending", 308 "zfs_scrub_limit", 309 "zfs_no_scrub_io", 310 "zfs_no_scrub_prefetch", 311 "zfs_vdev_time_shift", 312 "zfs_vdev_ramp_rate", 313 "zfs_vdev_aggregation_limit", 314 "fzap_default_block_shift", 315 "zfs_immediate_write_sz", 316 "zfs_read_chunk_size", 317 "zfs_nocacheflush", 318 "zil_replay_disable", 319 "metaslab_gang_bang", 320 "metaslab_df_alloc_threshold", 321 "metaslab_df_free_pct", 322 "zio_injection_enabled", 323 "zvol_immediate_write_sz", 324 }; 325 326 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 327 int sz; 328 uint64_t val64; 329 uint32_t *val32p = (uint32_t *)&val64; 330 331 sz = mdb_readvar(&val64, params[i]); 332 if (sz == 4) { 333 mdb_printf("%s = 0x%x\n", params[i], *val32p); 334 } else if (sz == 8) { 335 mdb_printf("%s = 0x%llx\n", params[i], val64); 336 } else { 337 mdb_warn("variable %s not found", params[i]); 338 } 339 } 340 341 return (DCMD_OK); 342 } 343 344 /* ARGSUSED */ 345 static int 346 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 347 { 348 mdb_ctf_id_t type_enum, checksum_enum, compress_enum; 349 char type[80], checksum[80], compress[80]; 350 blkptr_t blk, *bp = &blk; 351 char buf[BP_SPRINTF_LEN]; 352 353 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { 354 mdb_warn("failed to read blkptr_t"); 355 return (DCMD_ERR); 356 } 357 358 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 || 359 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 || 360 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) { 361 mdb_warn("Could not find blkptr enumerated types"); 362 return (DCMD_ERR); 363 } 364 365 enum_lookup(type, sizeof (type), type_enum, 366 BP_GET_TYPE(bp), "DMU_OT_"); 367 enum_lookup(checksum, sizeof (checksum), checksum_enum, 368 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_"); 369 enum_lookup(compress, sizeof (compress), compress_enum, 370 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_"); 371 372 SPRINTF_BLKPTR(mdb_snprintf, '\n', buf, bp, type, checksum, compress); 373 374 mdb_printf("%s\n", buf); 375 376 return (DCMD_OK); 377 } 378 379 typedef struct mdb_dmu_buf_impl { 380 struct { 381 uint64_t db_object; 382 } db; 383 void *db_objset; 384 uint64_t db_level; 385 uint64_t db_blkid; 386 struct { 387 uint64_t rc_count; 388 } db_holds; 389 } mdb_dmu_buf_impl_t; 390 391 /* ARGSUSED */ 392 static int 393 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 394 { 395 mdb_dmu_buf_impl_t db; 396 char objectname[32]; 397 char blkidname[32]; 398 char path[MAXNAMELEN]; 399 400 if (DCMD_HDRSPEC(flags)) 401 mdb_printf(" addr object lvl blkid holds os\n"); 402 403 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 404 addr, 0) == -1) 405 return (DCMD_ERR); 406 407 if (db.db.db_object == DMU_META_DNODE_OBJECT) 408 (void) strcpy(objectname, "mdn"); 409 else 410 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 411 (u_longlong_t)db.db.db_object); 412 413 if (db.db_blkid == DMU_BONUS_BLKID) 414 (void) strcpy(blkidname, "bonus"); 415 else 416 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 417 (u_longlong_t)db.db_blkid); 418 419 if (objset_name((uintptr_t)db.db_objset, path)) { 420 return (DCMD_ERR); 421 } 422 423 mdb_printf("%p %8s %1u %9s %2llu %s\n", addr, 424 objectname, (int)db.db_level, blkidname, 425 db.db_holds.rc_count, path); 426 427 return (DCMD_OK); 428 } 429 430 /* ARGSUSED */ 431 static int 432 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 433 { 434 #define HISTOSZ 32 435 uintptr_t dbp; 436 dmu_buf_impl_t db; 437 dbuf_hash_table_t ht; 438 uint64_t bucket, ndbufs; 439 uint64_t histo[HISTOSZ]; 440 uint64_t histo2[HISTOSZ]; 441 int i, maxidx; 442 443 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 444 mdb_warn("failed to read 'dbuf_hash_table'"); 445 return (DCMD_ERR); 446 } 447 448 for (i = 0; i < HISTOSZ; i++) { 449 histo[i] = 0; 450 histo2[i] = 0; 451 } 452 453 ndbufs = 0; 454 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 455 int len; 456 457 if (mdb_vread(&dbp, sizeof (void *), 458 (uintptr_t)(ht.hash_table+bucket)) == -1) { 459 mdb_warn("failed to read hash bucket %u at %p", 460 bucket, ht.hash_table+bucket); 461 return (DCMD_ERR); 462 } 463 464 len = 0; 465 while (dbp != 0) { 466 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 467 dbp) == -1) { 468 mdb_warn("failed to read dbuf at %p", dbp); 469 return (DCMD_ERR); 470 } 471 dbp = (uintptr_t)db.db_hash_next; 472 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 473 histo2[i]++; 474 len++; 475 ndbufs++; 476 } 477 478 if (len >= HISTOSZ) 479 len = HISTOSZ-1; 480 histo[len]++; 481 } 482 483 mdb_printf("hash table has %llu buckets, %llu dbufs " 484 "(avg %llu buckets/dbuf)\n", 485 ht.hash_table_mask+1, ndbufs, 486 (ht.hash_table_mask+1)/ndbufs); 487 488 mdb_printf("\n"); 489 maxidx = 0; 490 for (i = 0; i < HISTOSZ; i++) 491 if (histo[i] > 0) 492 maxidx = i; 493 mdb_printf("hash chain length number of buckets\n"); 494 for (i = 0; i <= maxidx; i++) 495 mdb_printf("%u %llu\n", i, histo[i]); 496 497 mdb_printf("\n"); 498 maxidx = 0; 499 for (i = 0; i < HISTOSZ; i++) 500 if (histo2[i] > 0) 501 maxidx = i; 502 mdb_printf("hash chain depth number of dbufs\n"); 503 for (i = 0; i <= maxidx; i++) 504 mdb_printf("%u or more %llu %llu%%\n", 505 i, histo2[i], histo2[i]*100/ndbufs); 506 507 508 return (DCMD_OK); 509 } 510 511 #define CHAIN_END 0xffff 512 /* 513 * ::zap_leaf [-v] 514 * 515 * Print a zap_leaf_phys_t, assumed to be 16k 516 */ 517 /* ARGSUSED */ 518 static int 519 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 520 { 521 char buf[16*1024]; 522 int verbose = B_FALSE; 523 int four = B_FALSE; 524 zap_leaf_t l; 525 zap_leaf_phys_t *zlp = (void *)buf; 526 int i; 527 528 if (mdb_getopts(argc, argv, 529 'v', MDB_OPT_SETBITS, TRUE, &verbose, 530 '4', MDB_OPT_SETBITS, TRUE, &four, 531 NULL) != argc) 532 return (DCMD_USAGE); 533 534 l.l_phys = zlp; 535 l.l_bs = 14; /* assume 16k blocks */ 536 if (four) 537 l.l_bs = 12; 538 539 if (!(flags & DCMD_ADDRSPEC)) { 540 return (DCMD_USAGE); 541 } 542 543 if (mdb_vread(buf, sizeof (buf), addr) == -1) { 544 mdb_warn("failed to read zap_leaf_phys_t at %p", addr); 545 return (DCMD_ERR); 546 } 547 548 if (zlp->l_hdr.lh_block_type != ZBT_LEAF || 549 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { 550 mdb_warn("This does not appear to be a zap_leaf_phys_t"); 551 return (DCMD_ERR); 552 } 553 554 mdb_printf("zap_leaf_phys_t at %p:\n", addr); 555 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); 556 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); 557 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); 558 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, 559 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); 560 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); 561 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, 562 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? 563 "ENTRIES_CDSORTED" : ""); 564 565 if (verbose) { 566 mdb_printf(" hash table:\n"); 567 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { 568 if (zlp->l_hash[i] != CHAIN_END) 569 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); 570 } 571 } 572 573 mdb_printf(" chunks:\n"); 574 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { 575 /* LINTED: alignment */ 576 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); 577 switch (zlc->l_entry.le_type) { 578 case ZAP_CHUNK_FREE: 579 if (verbose) { 580 mdb_printf(" %u: free; lf_next = %u\n", 581 i, zlc->l_free.lf_next); 582 } 583 break; 584 case ZAP_CHUNK_ENTRY: 585 mdb_printf(" %u: entry\n", i); 586 if (verbose) { 587 mdb_printf(" le_next = %u\n", 588 zlc->l_entry.le_next); 589 } 590 mdb_printf(" le_name_chunk = %u\n", 591 zlc->l_entry.le_name_chunk); 592 mdb_printf(" le_name_numints = %u\n", 593 zlc->l_entry.le_name_numints); 594 mdb_printf(" le_value_chunk = %u\n", 595 zlc->l_entry.le_value_chunk); 596 mdb_printf(" le_value_intlen = %u\n", 597 zlc->l_entry.le_value_intlen); 598 mdb_printf(" le_value_numints = %u\n", 599 zlc->l_entry.le_value_numints); 600 mdb_printf(" le_cd = %u\n", 601 zlc->l_entry.le_cd); 602 mdb_printf(" le_hash = %llx\n", 603 zlc->l_entry.le_hash); 604 break; 605 case ZAP_CHUNK_ARRAY: 606 mdb_printf(" %u: array", i); 607 if (strisprint((char *)zlc->l_array.la_array)) 608 mdb_printf(" \"%s\"", zlc->l_array.la_array); 609 mdb_printf("\n"); 610 if (verbose) { 611 int j; 612 mdb_printf(" "); 613 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { 614 mdb_printf("%02x ", 615 zlc->l_array.la_array[j]); 616 } 617 mdb_printf("\n"); 618 } 619 if (zlc->l_array.la_next != CHAIN_END) { 620 mdb_printf(" lf_next = %u\n", 621 zlc->l_array.la_next); 622 } 623 break; 624 default: 625 mdb_printf(" %u: undefined type %u\n", 626 zlc->l_entry.le_type); 627 } 628 } 629 630 return (DCMD_OK); 631 } 632 633 typedef struct dbufs_data { 634 mdb_ctf_id_t id; 635 uint64_t objset; 636 uint64_t object; 637 uint64_t level; 638 uint64_t blkid; 639 char *osname; 640 } dbufs_data_t; 641 642 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 643 644 /* ARGSUSED */ 645 static int 646 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 647 { 648 dbufs_data_t *data = arg; 649 uintptr_t objset; 650 dmu_buf_t db; 651 uint8_t level; 652 uint64_t blkid; 653 char osname[MAXNAMELEN]; 654 655 if (GETMEMBID(addr, &data->id, db_objset, objset) || 656 GETMEMBID(addr, &data->id, db, db) || 657 GETMEMBID(addr, &data->id, db_level, level) || 658 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 659 return (WALK_ERR); 660 } 661 662 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 663 (data->osname == NULL || (objset_name(objset, osname) == 0 && 664 strcmp(data->osname, osname) == 0)) && 665 (data->object == DBUFS_UNSET || data->object == db.db_object) && 666 (data->level == DBUFS_UNSET || data->level == level) && 667 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 668 mdb_printf("%#lr\n", addr); 669 } 670 return (WALK_NEXT); 671 } 672 673 /* ARGSUSED */ 674 static int 675 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 676 { 677 dbufs_data_t data; 678 char *object = NULL; 679 char *blkid = NULL; 680 681 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 682 data.osname = NULL; 683 684 if (mdb_getopts(argc, argv, 685 'O', MDB_OPT_UINT64, &data.objset, 686 'n', MDB_OPT_STR, &data.osname, 687 'o', MDB_OPT_STR, &object, 688 'l', MDB_OPT_UINT64, &data.level, 689 'b', MDB_OPT_STR, &blkid) != argc) { 690 return (DCMD_USAGE); 691 } 692 693 if (object) { 694 if (strcmp(object, "mdn") == 0) { 695 data.object = DMU_META_DNODE_OBJECT; 696 } else { 697 data.object = mdb_strtoull(object); 698 } 699 } 700 701 if (blkid) { 702 if (strcmp(blkid, "bonus") == 0) { 703 data.blkid = DMU_BONUS_BLKID; 704 } else { 705 data.blkid = mdb_strtoull(blkid); 706 } 707 } 708 709 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) { 710 mdb_warn("couldn't find struct dmu_buf_impl_t"); 711 return (DCMD_ERR); 712 } 713 714 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 715 mdb_warn("can't walk dbufs"); 716 return (DCMD_ERR); 717 } 718 719 return (DCMD_OK); 720 } 721 722 typedef struct abuf_find_data { 723 dva_t dva; 724 mdb_ctf_id_t id; 725 } abuf_find_data_t; 726 727 /* ARGSUSED */ 728 static int 729 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 730 { 731 abuf_find_data_t *data = arg; 732 dva_t dva; 733 734 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 735 return (WALK_ERR); 736 } 737 738 if (dva.dva_word[0] == data->dva.dva_word[0] && 739 dva.dva_word[1] == data->dva.dva_word[1]) { 740 mdb_printf("%#lr\n", addr); 741 } 742 return (WALK_NEXT); 743 } 744 745 /* ARGSUSED */ 746 static int 747 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 748 { 749 abuf_find_data_t data; 750 GElf_Sym sym; 751 int i; 752 const char *syms[] = { 753 "ARC_mru", 754 "ARC_mru_ghost", 755 "ARC_mfu", 756 "ARC_mfu_ghost", 757 }; 758 759 if (argc != 2) 760 return (DCMD_USAGE); 761 762 for (i = 0; i < 2; i ++) { 763 switch (argv[i].a_type) { 764 case MDB_TYPE_STRING: 765 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 766 break; 767 case MDB_TYPE_IMMEDIATE: 768 data.dva.dva_word[i] = argv[i].a_un.a_val; 769 break; 770 default: 771 return (DCMD_USAGE); 772 } 773 } 774 775 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) { 776 mdb_warn("couldn't find struct arc_buf_hdr"); 777 return (DCMD_ERR); 778 } 779 780 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 781 if (mdb_lookup_by_name(syms[i], &sym)) { 782 mdb_warn("can't find symbol %s", syms[i]); 783 return (DCMD_ERR); 784 } 785 786 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 787 mdb_warn("can't walk %s", syms[i]); 788 return (DCMD_ERR); 789 } 790 } 791 792 return (DCMD_OK); 793 } 794 795 796 typedef struct dbgmsg_arg { 797 boolean_t da_verbose; 798 boolean_t da_address; 799 } dbgmsg_arg_t; 800 801 /* ARGSUSED */ 802 static int 803 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 804 { 805 static mdb_ctf_id_t id; 806 static boolean_t gotid; 807 static ulong_t off; 808 809 dbgmsg_arg_t *da = arg; 810 time_t timestamp; 811 char buf[1024]; 812 813 if (!gotid) { 814 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == 815 -1) { 816 mdb_warn("couldn't find struct zfs_dbgmsg"); 817 return (WALK_ERR); 818 } 819 gotid = TRUE; 820 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 821 mdb_warn("couldn't find zdm_msg"); 822 return (WALK_ERR); 823 } 824 off /= 8; 825 } 826 827 828 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 829 return (WALK_ERR); 830 } 831 832 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 833 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 834 return (DCMD_ERR); 835 } 836 837 if (da->da_address) 838 mdb_printf("%p ", addr); 839 if (da->da_verbose) 840 mdb_printf("%Y ", timestamp); 841 842 mdb_printf("%s\n", buf); 843 844 if (da->da_verbose) 845 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 846 847 return (WALK_NEXT); 848 } 849 850 /* ARGSUSED */ 851 static int 852 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 853 { 854 GElf_Sym sym; 855 dbgmsg_arg_t da = { 0 }; 856 857 if (mdb_getopts(argc, argv, 858 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 859 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, 860 NULL) != argc) 861 return (DCMD_USAGE); 862 863 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { 864 mdb_warn("can't find zfs_dbgmsgs"); 865 return (DCMD_ERR); 866 } 867 868 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { 869 mdb_warn("can't walk zfs_dbgmsgs"); 870 return (DCMD_ERR); 871 } 872 873 return (DCMD_OK); 874 } 875 876 /*ARGSUSED*/ 877 static int 878 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 879 { 880 kstat_named_t *stats; 881 GElf_Sym sym; 882 int nstats, i; 883 uint_t opt_a = FALSE; 884 uint_t opt_b = FALSE; 885 uint_t shift = 0; 886 const char *suffix; 887 888 static const char *bytestats[] = { 889 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 890 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 891 NULL 892 }; 893 894 static const char *extras[] = { 895 "arc_no_grow", "arc_tempreserve", 896 NULL 897 }; 898 899 if (mdb_lookup_by_name("arc_stats", &sym) == -1) { 900 mdb_warn("failed to find 'arc_stats'"); 901 return (DCMD_ERR); 902 } 903 904 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 905 906 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 907 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 908 return (DCMD_ERR); 909 } 910 911 nstats = sym.st_size / sizeof (kstat_named_t); 912 913 /* NB: -a / opt_a are ignored for backwards compatability */ 914 if (mdb_getopts(argc, argv, 915 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 916 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 917 'k', MDB_OPT_SETBITS, 10, &shift, 918 'm', MDB_OPT_SETBITS, 20, &shift, 919 'g', MDB_OPT_SETBITS, 30, &shift, 920 NULL) != argc) 921 return (DCMD_USAGE); 922 923 if (!opt_b && !shift) 924 shift = 20; 925 926 switch (shift) { 927 case 0: 928 suffix = "B"; 929 break; 930 case 10: 931 suffix = "KB"; 932 break; 933 case 20: 934 suffix = "MB"; 935 break; 936 case 30: 937 suffix = "GB"; 938 break; 939 default: 940 suffix = "XX"; 941 } 942 943 for (i = 0; i < nstats; i++) { 944 int j; 945 boolean_t bytes = B_FALSE; 946 947 for (j = 0; bytestats[j]; j++) { 948 if (strcmp(stats[i].name, bytestats[j]) == 0) { 949 bytes = B_TRUE; 950 break; 951 } 952 } 953 954 if (bytes) { 955 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 956 stats[i].value.ui64 >> shift, suffix); 957 } else { 958 mdb_printf("%-25s = %9llu\n", stats[i].name, 959 stats[i].value.ui64); 960 } 961 } 962 963 for (i = 0; extras[i]; i++) { 964 uint64_t buf; 965 966 if (mdb_lookup_by_name(extras[i], &sym) == -1) { 967 mdb_warn("failed to find '%s'", extras[i]); 968 return (DCMD_ERR); 969 } 970 971 if (sym.st_size != sizeof (uint64_t) && 972 sym.st_size != sizeof (uint32_t)) { 973 mdb_warn("expected scalar for variable '%s'\n", 974 extras[i]); 975 return (DCMD_ERR); 976 } 977 978 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 979 mdb_warn("couldn't read '%s'", extras[i]); 980 return (DCMD_ERR); 981 } 982 983 mdb_printf("%-25s = ", extras[i]); 984 985 /* NB: all the 64-bit extras happen to be byte counts */ 986 if (sym.st_size == sizeof (uint64_t)) 987 mdb_printf("%9llu %s\n", buf >> shift, suffix); 988 989 if (sym.st_size == sizeof (uint32_t)) 990 mdb_printf("%9d\n", *((uint32_t *)&buf)); 991 } 992 return (DCMD_OK); 993 } 994 995 /* 996 * ::spa 997 * 998 * -c Print configuration information as well 999 * -v Print vdev state 1000 * -e Print vdev error stats 1001 * 1002 * Print a summarized spa_t. When given no arguments, prints out a table of all 1003 * active pools on the system. 1004 */ 1005 /* ARGSUSED */ 1006 static int 1007 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1008 { 1009 spa_t spa; 1010 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1011 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1012 const char *state; 1013 int config = FALSE; 1014 int vdevs = FALSE; 1015 int errors = FALSE; 1016 1017 if (mdb_getopts(argc, argv, 1018 'c', MDB_OPT_SETBITS, TRUE, &config, 1019 'v', MDB_OPT_SETBITS, TRUE, &vdevs, 1020 'e', MDB_OPT_SETBITS, TRUE, &errors, 1021 NULL) != argc) 1022 return (DCMD_USAGE); 1023 1024 if (!(flags & DCMD_ADDRSPEC)) { 1025 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1026 mdb_warn("can't walk spa"); 1027 return (DCMD_ERR); 1028 } 1029 1030 return (DCMD_OK); 1031 } 1032 1033 if (flags & DCMD_PIPE_OUT) { 1034 mdb_printf("%#lr\n", addr); 1035 return (DCMD_OK); 1036 } 1037 1038 if (DCMD_HDRSPEC(flags)) 1039 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1040 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1041 1042 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1043 mdb_warn("failed to read spa_t at %p", addr); 1044 return (DCMD_ERR); 1045 } 1046 1047 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1048 state = "UNKNOWN"; 1049 else 1050 state = statetab[spa.spa_state]; 1051 1052 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1053 1054 if (config) { 1055 mdb_printf("\n"); 1056 mdb_inc_indent(4); 1057 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1058 NULL) != DCMD_OK) 1059 return (DCMD_ERR); 1060 mdb_dec_indent(4); 1061 } 1062 1063 if (vdevs || errors) { 1064 mdb_arg_t v; 1065 1066 v.a_type = MDB_TYPE_STRING; 1067 v.a_un.a_str = "-e"; 1068 1069 mdb_printf("\n"); 1070 mdb_inc_indent(4); 1071 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0, 1072 &v) != DCMD_OK) 1073 return (DCMD_ERR); 1074 mdb_dec_indent(4); 1075 } 1076 1077 return (DCMD_OK); 1078 } 1079 1080 typedef struct mdb_spa_config_spa { 1081 nvlist_t *spa_config; 1082 } mdb_spa_config_spa_t; 1083 1084 /* 1085 * ::spa_config 1086 * 1087 * Given a spa_t, print the configuration information stored in spa_config. 1088 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1089 * We simply read the value of spa_config and pass off to ::nvlist. 1090 */ 1091 /* ARGSUSED */ 1092 static int 1093 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1094 { 1095 mdb_spa_config_spa_t spa; 1096 1097 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1098 return (DCMD_USAGE); 1099 1100 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", 1101 addr, 0) == -1) 1102 return (DCMD_ERR); 1103 1104 if (spa.spa_config == NULL) { 1105 mdb_printf("(none)\n"); 1106 return (DCMD_OK); 1107 } 1108 1109 return (mdb_call_dcmd("nvlist", (uintptr_t)spa.spa_config, flags, 1110 0, NULL)); 1111 } 1112 1113 /* 1114 * ::vdev 1115 * 1116 * Print out a summarized vdev_t, in the following form: 1117 * 1118 * ADDR STATE AUX DESC 1119 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1120 * 1121 * If '-r' is specified, recursively visit all children. 1122 * 1123 * With '-e', the statistics associated with the vdev are printed as well. 1124 */ 1125 static int 1126 do_print_vdev(uintptr_t addr, int flags, int depth, int stats, 1127 int recursive) 1128 { 1129 vdev_t vdev; 1130 char desc[MAXNAMELEN]; 1131 int c, children; 1132 uintptr_t *child; 1133 const char *state, *aux; 1134 1135 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1136 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1137 return (DCMD_ERR); 1138 } 1139 1140 if (flags & DCMD_PIPE_OUT) { 1141 mdb_printf("%#lr", addr); 1142 } else { 1143 if (vdev.vdev_path != NULL) { 1144 if (mdb_readstr(desc, sizeof (desc), 1145 (uintptr_t)vdev.vdev_path) == -1) { 1146 mdb_warn("failed to read vdev_path at %p\n", 1147 vdev.vdev_path); 1148 return (DCMD_ERR); 1149 } 1150 } else if (vdev.vdev_ops != NULL) { 1151 vdev_ops_t ops; 1152 if (mdb_vread(&ops, sizeof (ops), 1153 (uintptr_t)vdev.vdev_ops) == -1) { 1154 mdb_warn("failed to read vdev_ops at %p\n", 1155 vdev.vdev_ops); 1156 return (DCMD_ERR); 1157 } 1158 (void) strcpy(desc, ops.vdev_op_type); 1159 } else { 1160 (void) strcpy(desc, "<unknown>"); 1161 } 1162 1163 if (depth == 0 && DCMD_HDRSPEC(flags)) 1164 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1165 "ADDR", "STATE", "AUX", 1166 sizeof (uintptr_t) == 4 ? 43 : 35, 1167 "DESCRIPTION"); 1168 1169 mdb_printf("%0?p ", addr); 1170 1171 switch (vdev.vdev_state) { 1172 case VDEV_STATE_CLOSED: 1173 state = "CLOSED"; 1174 break; 1175 case VDEV_STATE_OFFLINE: 1176 state = "OFFLINE"; 1177 break; 1178 case VDEV_STATE_CANT_OPEN: 1179 state = "CANT_OPEN"; 1180 break; 1181 case VDEV_STATE_DEGRADED: 1182 state = "DEGRADED"; 1183 break; 1184 case VDEV_STATE_HEALTHY: 1185 state = "HEALTHY"; 1186 break; 1187 case VDEV_STATE_REMOVED: 1188 state = "REMOVED"; 1189 break; 1190 case VDEV_STATE_FAULTED: 1191 state = "FAULTED"; 1192 break; 1193 default: 1194 state = "UNKNOWN"; 1195 break; 1196 } 1197 1198 switch (vdev.vdev_stat.vs_aux) { 1199 case VDEV_AUX_NONE: 1200 aux = "-"; 1201 break; 1202 case VDEV_AUX_OPEN_FAILED: 1203 aux = "OPEN_FAILED"; 1204 break; 1205 case VDEV_AUX_CORRUPT_DATA: 1206 aux = "CORRUPT_DATA"; 1207 break; 1208 case VDEV_AUX_NO_REPLICAS: 1209 aux = "NO_REPLICAS"; 1210 break; 1211 case VDEV_AUX_BAD_GUID_SUM: 1212 aux = "BAD_GUID_SUM"; 1213 break; 1214 case VDEV_AUX_TOO_SMALL: 1215 aux = "TOO_SMALL"; 1216 break; 1217 case VDEV_AUX_BAD_LABEL: 1218 aux = "BAD_LABEL"; 1219 break; 1220 case VDEV_AUX_VERSION_NEWER: 1221 aux = "VERS_NEWER"; 1222 break; 1223 case VDEV_AUX_VERSION_OLDER: 1224 aux = "VERS_OLDER"; 1225 break; 1226 case VDEV_AUX_UNSUP_FEAT: 1227 aux = "UNSUP_FEAT"; 1228 break; 1229 case VDEV_AUX_SPARED: 1230 aux = "SPARED"; 1231 break; 1232 case VDEV_AUX_ERR_EXCEEDED: 1233 aux = "ERR_EXCEEDED"; 1234 break; 1235 case VDEV_AUX_IO_FAILURE: 1236 aux = "IO_FAILURE"; 1237 break; 1238 case VDEV_AUX_BAD_LOG: 1239 aux = "BAD_LOG"; 1240 break; 1241 case VDEV_AUX_EXTERNAL: 1242 aux = "EXTERNAL"; 1243 break; 1244 case VDEV_AUX_SPLIT_POOL: 1245 aux = "SPLIT_POOL"; 1246 break; 1247 default: 1248 aux = "UNKNOWN"; 1249 break; 1250 } 1251 1252 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1253 1254 if (stats) { 1255 vdev_stat_t *vs = &vdev.vdev_stat; 1256 int i; 1257 1258 mdb_inc_indent(4); 1259 mdb_printf("\n"); 1260 mdb_printf("%<u> %12s %12s %12s %12s " 1261 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1262 "IOCTL"); 1263 mdb_printf("OPS "); 1264 for (i = 1; i < ZIO_TYPES; i++) 1265 mdb_printf("%11#llx%s", vs->vs_ops[i], 1266 i == ZIO_TYPES - 1 ? "" : " "); 1267 mdb_printf("\n"); 1268 mdb_printf("BYTES "); 1269 for (i = 1; i < ZIO_TYPES; i++) 1270 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1271 i == ZIO_TYPES - 1 ? "" : " "); 1272 1273 1274 mdb_printf("\n"); 1275 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1276 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1277 mdb_printf("ECKSUM %10#llx\n", 1278 vs->vs_checksum_errors); 1279 mdb_dec_indent(4); 1280 } 1281 1282 if (stats) 1283 mdb_printf("\n"); 1284 } 1285 1286 children = vdev.vdev_children; 1287 1288 if (children == 0 || !recursive) 1289 return (DCMD_OK); 1290 1291 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1292 if (mdb_vread(child, children * sizeof (void *), 1293 (uintptr_t)vdev.vdev_child) == -1) { 1294 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1295 return (DCMD_ERR); 1296 } 1297 1298 for (c = 0; c < children; c++) { 1299 if (do_print_vdev(child[c], flags, depth + 2, stats, 1300 recursive)) 1301 return (DCMD_ERR); 1302 } 1303 1304 return (DCMD_OK); 1305 } 1306 1307 static int 1308 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1309 { 1310 int recursive = FALSE; 1311 int stats = FALSE; 1312 uint64_t depth = 0; 1313 1314 if (mdb_getopts(argc, argv, 1315 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1316 'e', MDB_OPT_SETBITS, TRUE, &stats, 1317 'd', MDB_OPT_UINT64, &depth, 1318 NULL) != argc) 1319 return (DCMD_USAGE); 1320 1321 if (!(flags & DCMD_ADDRSPEC)) { 1322 mdb_warn("no vdev_t address given\n"); 1323 return (DCMD_ERR); 1324 } 1325 1326 return (do_print_vdev(addr, flags, (int)depth, stats, recursive)); 1327 } 1328 1329 typedef struct metaslab_walk_data { 1330 uint64_t mw_numvdevs; 1331 uintptr_t *mw_vdevs; 1332 int mw_curvdev; 1333 uint64_t mw_nummss; 1334 uintptr_t *mw_mss; 1335 int mw_curms; 1336 } metaslab_walk_data_t; 1337 1338 static int 1339 metaslab_walk_step(mdb_walk_state_t *wsp) 1340 { 1341 metaslab_walk_data_t *mw = wsp->walk_data; 1342 metaslab_t ms; 1343 uintptr_t msp; 1344 1345 if (mw->mw_curvdev >= mw->mw_numvdevs) 1346 return (WALK_DONE); 1347 1348 if (mw->mw_mss == NULL) { 1349 uintptr_t mssp; 1350 uintptr_t vdevp; 1351 1352 ASSERT(mw->mw_curms == 0); 1353 ASSERT(mw->mw_nummss == 0); 1354 1355 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1356 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || 1357 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { 1358 return (WALK_ERR); 1359 } 1360 1361 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1362 UM_SLEEP | UM_GC); 1363 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1364 mssp) == -1) { 1365 mdb_warn("failed to read vdev_ms at %p", mssp); 1366 return (WALK_ERR); 1367 } 1368 } 1369 1370 if (mw->mw_curms >= mw->mw_nummss) { 1371 mw->mw_mss = NULL; 1372 mw->mw_curms = 0; 1373 mw->mw_nummss = 0; 1374 mw->mw_curvdev++; 1375 return (WALK_NEXT); 1376 } 1377 1378 msp = mw->mw_mss[mw->mw_curms]; 1379 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1380 mdb_warn("failed to read metaslab_t at %p", msp); 1381 return (WALK_ERR); 1382 } 1383 1384 mw->mw_curms++; 1385 1386 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1387 } 1388 1389 /* ARGSUSED */ 1390 static int 1391 metaslab_walk_init(mdb_walk_state_t *wsp) 1392 { 1393 metaslab_walk_data_t *mw; 1394 uintptr_t root_vdevp; 1395 uintptr_t childp; 1396 1397 if (wsp->walk_addr == NULL) { 1398 mdb_warn("must supply address of spa_t\n"); 1399 return (WALK_ERR); 1400 } 1401 1402 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1403 1404 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || 1405 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || 1406 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { 1407 return (DCMD_ERR); 1408 } 1409 1410 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1411 UM_SLEEP | UM_GC); 1412 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1413 childp) == -1) { 1414 mdb_warn("failed to read root vdev children at %p", childp); 1415 return (DCMD_ERR); 1416 } 1417 1418 wsp->walk_data = mw; 1419 1420 return (WALK_NEXT); 1421 } 1422 1423 typedef struct mdb_spa { 1424 uintptr_t spa_dsl_pool; 1425 uintptr_t spa_root_vdev; 1426 } mdb_spa_t; 1427 1428 typedef struct mdb_dsl_dir { 1429 uintptr_t dd_phys; 1430 int64_t dd_space_towrite[TXG_SIZE]; 1431 } mdb_dsl_dir_t; 1432 1433 typedef struct mdb_dsl_dir_phys { 1434 uint64_t dd_used_bytes; 1435 uint64_t dd_compressed_bytes; 1436 uint64_t dd_uncompressed_bytes; 1437 } mdb_dsl_dir_phys_t; 1438 1439 typedef struct mdb_vdev { 1440 uintptr_t vdev_parent; 1441 uintptr_t vdev_ms; 1442 uint64_t vdev_ms_count; 1443 vdev_stat_t vdev_stat; 1444 } mdb_vdev_t; 1445 1446 typedef struct mdb_metaslab { 1447 space_map_t ms_allocmap[TXG_SIZE]; 1448 space_map_t ms_freemap[TXG_SIZE]; 1449 space_map_t ms_map; 1450 space_map_obj_t ms_smo; 1451 space_map_obj_t ms_smo_syncing; 1452 } mdb_metaslab_t; 1453 1454 typedef struct space_data { 1455 uint64_t ms_allocmap[TXG_SIZE]; 1456 uint64_t ms_freemap[TXG_SIZE]; 1457 uint64_t ms_map; 1458 uint64_t avail; 1459 uint64_t nowavail; 1460 } space_data_t; 1461 1462 /* ARGSUSED */ 1463 static int 1464 space_cb(uintptr_t addr, const void *unknown, void *arg) 1465 { 1466 space_data_t *sd = arg; 1467 mdb_metaslab_t ms; 1468 1469 if (GETMEMB(addr, "metaslab", ms_allocmap, ms.ms_allocmap) || 1470 GETMEMB(addr, "metaslab", ms_freemap, ms.ms_freemap) || 1471 GETMEMB(addr, "metaslab", ms_map, ms.ms_map) || 1472 GETMEMB(addr, "metaslab", ms_smo, ms.ms_smo) || 1473 GETMEMB(addr, "metaslab", ms_smo_syncing, ms.ms_smo_syncing)) { 1474 return (WALK_ERR); 1475 } 1476 1477 sd->ms_allocmap[0] += ms.ms_allocmap[0].sm_space; 1478 sd->ms_allocmap[1] += ms.ms_allocmap[1].sm_space; 1479 sd->ms_allocmap[2] += ms.ms_allocmap[2].sm_space; 1480 sd->ms_allocmap[3] += ms.ms_allocmap[3].sm_space; 1481 sd->ms_freemap[0] += ms.ms_freemap[0].sm_space; 1482 sd->ms_freemap[1] += ms.ms_freemap[1].sm_space; 1483 sd->ms_freemap[2] += ms.ms_freemap[2].sm_space; 1484 sd->ms_freemap[3] += ms.ms_freemap[3].sm_space; 1485 sd->ms_map += ms.ms_map.sm_space; 1486 sd->avail += ms.ms_map.sm_size - ms.ms_smo.smo_alloc; 1487 sd->nowavail += ms.ms_map.sm_size - ms.ms_smo_syncing.smo_alloc; 1488 1489 return (WALK_NEXT); 1490 } 1491 1492 /* 1493 * ::spa_space [-b] 1494 * 1495 * Given a spa_t, print out it's on-disk space usage and in-core 1496 * estimates of future usage. If -b is given, print space in bytes. 1497 * Otherwise print in megabytes. 1498 */ 1499 /* ARGSUSED */ 1500 static int 1501 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1502 { 1503 mdb_spa_t spa; 1504 uintptr_t dp_root_dir; 1505 mdb_dsl_dir_t dd; 1506 mdb_dsl_dir_phys_t dsp; 1507 uint64_t children; 1508 uintptr_t childaddr; 1509 space_data_t sd; 1510 int shift = 20; 1511 char *suffix = "M"; 1512 int bytes = B_FALSE; 1513 1514 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != 1515 argc) 1516 return (DCMD_USAGE); 1517 if (!(flags & DCMD_ADDRSPEC)) 1518 return (DCMD_USAGE); 1519 1520 if (bytes) { 1521 shift = 0; 1522 suffix = ""; 1523 } 1524 1525 if (GETMEMB(addr, "spa", spa_dsl_pool, spa.spa_dsl_pool) || 1526 GETMEMB(addr, "spa", spa_root_vdev, spa.spa_root_vdev) || 1527 GETMEMB(spa.spa_root_vdev, "vdev", vdev_children, children) || 1528 GETMEMB(spa.spa_root_vdev, "vdev", vdev_child, childaddr) || 1529 GETMEMB(spa.spa_dsl_pool, "dsl_pool", 1530 dp_root_dir, dp_root_dir) || 1531 GETMEMB(dp_root_dir, "dsl_dir", dd_phys, dd.dd_phys) || 1532 GETMEMB(dp_root_dir, "dsl_dir", 1533 dd_space_towrite, dd.dd_space_towrite) || 1534 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1535 dd_used_bytes, dsp.dd_used_bytes) || 1536 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1537 dd_compressed_bytes, dsp.dd_compressed_bytes) || 1538 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1539 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) { 1540 return (DCMD_ERR); 1541 } 1542 1543 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1544 dd.dd_space_towrite[0] >> shift, suffix, 1545 dd.dd_space_towrite[1] >> shift, suffix, 1546 dd.dd_space_towrite[2] >> shift, suffix, 1547 dd.dd_space_towrite[3] >> shift, suffix); 1548 1549 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1550 dsp.dd_used_bytes >> shift, suffix); 1551 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1552 dsp.dd_compressed_bytes >> shift, suffix); 1553 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1554 dsp.dd_uncompressed_bytes >> shift, suffix); 1555 1556 bzero(&sd, sizeof (sd)); 1557 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1558 mdb_warn("can't walk metaslabs"); 1559 return (DCMD_ERR); 1560 } 1561 1562 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1563 sd.ms_allocmap[0] >> shift, suffix, 1564 sd.ms_allocmap[1] >> shift, suffix, 1565 sd.ms_allocmap[2] >> shift, suffix, 1566 sd.ms_allocmap[3] >> shift, suffix); 1567 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1568 sd.ms_freemap[0] >> shift, suffix, 1569 sd.ms_freemap[1] >> shift, suffix, 1570 sd.ms_freemap[2] >> shift, suffix, 1571 sd.ms_freemap[3] >> shift, suffix); 1572 mdb_printf("ms_map = %llu%s\n", sd.ms_map >> shift, suffix); 1573 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1574 mdb_printf("current syncing avail = %llu%s\n", 1575 sd.nowavail >> shift, suffix); 1576 1577 return (DCMD_OK); 1578 } 1579 1580 /* 1581 * ::spa_verify 1582 * 1583 * Given a spa_t, verify that that the pool is self-consistent. 1584 * Currently, it only checks to make sure that the vdev tree exists. 1585 */ 1586 /* ARGSUSED */ 1587 static int 1588 spa_verify(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1589 { 1590 spa_t spa; 1591 1592 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1593 return (DCMD_USAGE); 1594 1595 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1596 mdb_warn("failed to read spa_t at %p", addr); 1597 return (DCMD_ERR); 1598 } 1599 1600 if (spa.spa_root_vdev == NULL) { 1601 mdb_printf("no vdev tree present\n"); 1602 return (DCMD_OK); 1603 } 1604 1605 return (DCMD_OK); 1606 } 1607 1608 static int 1609 spa_print_aux(spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 1610 const char *name) 1611 { 1612 uintptr_t *aux; 1613 size_t len; 1614 int ret, i; 1615 1616 /* 1617 * Iterate over aux vdevs and print those out as well. This is a 1618 * little annoying because we don't have a root vdev to pass to ::vdev. 1619 * Instead, we print a single line and then call it for each child 1620 * vdev. 1621 */ 1622 if (sav->sav_count != 0) { 1623 v[1].a_type = MDB_TYPE_STRING; 1624 v[1].a_un.a_str = "-d"; 1625 v[2].a_type = MDB_TYPE_IMMEDIATE; 1626 v[2].a_un.a_val = 2; 1627 1628 len = sav->sav_count * sizeof (uintptr_t); 1629 aux = mdb_alloc(len, UM_SLEEP); 1630 if (mdb_vread(aux, len, 1631 (uintptr_t)sav->sav_vdevs) == -1) { 1632 mdb_free(aux, len); 1633 mdb_warn("failed to read l2cache vdevs at %p", 1634 sav->sav_vdevs); 1635 return (DCMD_ERR); 1636 } 1637 1638 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 1639 1640 for (i = 0; i < sav->sav_count; i++) { 1641 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 1642 if (ret != DCMD_OK) { 1643 mdb_free(aux, len); 1644 return (ret); 1645 } 1646 } 1647 1648 mdb_free(aux, len); 1649 } 1650 1651 return (0); 1652 } 1653 1654 /* 1655 * ::spa_vdevs 1656 * 1657 * -e Include error stats 1658 * 1659 * Print out a summarized list of vdevs for the given spa_t. 1660 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 1661 * iterating over the cache devices. 1662 */ 1663 /* ARGSUSED */ 1664 static int 1665 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1666 { 1667 spa_t spa; 1668 mdb_arg_t v[3]; 1669 int errors = FALSE; 1670 int ret; 1671 1672 if (mdb_getopts(argc, argv, 1673 'e', MDB_OPT_SETBITS, TRUE, &errors, 1674 NULL) != argc) 1675 return (DCMD_USAGE); 1676 1677 if (!(flags & DCMD_ADDRSPEC)) 1678 return (DCMD_USAGE); 1679 1680 if (mdb_vread(&spa, sizeof (spa), addr) == -1) { 1681 mdb_warn("failed to read spa_t at %p", addr); 1682 return (DCMD_ERR); 1683 } 1684 1685 /* 1686 * Unitialized spa_t structures can have a NULL root vdev. 1687 */ 1688 if (spa.spa_root_vdev == NULL) { 1689 mdb_printf("no associated vdevs\n"); 1690 return (DCMD_OK); 1691 } 1692 1693 v[0].a_type = MDB_TYPE_STRING; 1694 v[0].a_un.a_str = errors ? "-re" : "-r"; 1695 1696 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1697 flags, 1, v); 1698 if (ret != DCMD_OK) 1699 return (ret); 1700 1701 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 1702 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 1703 return (DCMD_ERR); 1704 1705 return (DCMD_OK); 1706 } 1707 1708 /* 1709 * ::zio 1710 * 1711 * Print a summary of zio_t and all its children. This is intended to display a 1712 * zio tree, and hence we only pick the most important pieces of information for 1713 * the main summary. More detailed information can always be found by doing a 1714 * '::print zio' on the underlying zio_t. The columns we display are: 1715 * 1716 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED 1717 * 1718 * The 'address' column is indented by one space for each depth level as we 1719 * descend down the tree. 1720 */ 1721 1722 #define ZIO_MAXINDENT 7 1723 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 1724 #define ZIO_WALK_SELF 0 1725 #define ZIO_WALK_CHILD 1 1726 #define ZIO_WALK_PARENT 2 1727 1728 typedef struct zio_print_args { 1729 int zpa_current_depth; 1730 int zpa_min_depth; 1731 int zpa_max_depth; 1732 int zpa_type; 1733 uint_t zpa_flags; 1734 } zio_print_args_t; 1735 1736 typedef struct mdb_zio { 1737 enum zio_type io_type; 1738 enum zio_stage io_stage; 1739 void *io_waiter; 1740 void *io_spa; 1741 struct { 1742 struct { 1743 void *list_next; 1744 } list_head; 1745 } io_parent_list; 1746 int io_error; 1747 } mdb_zio_t; 1748 1749 typedef struct mdb_zio_timestamp { 1750 hrtime_t io_timestamp; 1751 } mdb_zio_timestamp_t; 1752 1753 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 1754 1755 static int 1756 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) 1757 { 1758 mdb_ctf_id_t type_enum, stage_enum; 1759 int indent = zpa->zpa_current_depth; 1760 const char *type, *stage; 1761 uintptr_t laddr; 1762 mdb_zio_t zio; 1763 mdb_zio_timestamp_t zio_timestamp = { 0 }; 1764 1765 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) 1766 return (WALK_ERR); 1767 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", 1768 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); 1769 1770 if (indent > ZIO_MAXINDENT) 1771 indent = ZIO_MAXINDENT; 1772 1773 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 1774 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 1775 mdb_warn("failed to lookup zio enums"); 1776 return (WALK_ERR); 1777 } 1778 1779 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) 1780 type += sizeof ("ZIO_TYPE_") - 1; 1781 else 1782 type = "?"; 1783 1784 if (zio.io_error == 0) { 1785 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); 1786 if (stage != NULL) 1787 stage += sizeof ("ZIO_STAGE_") - 1; 1788 else 1789 stage = "?"; 1790 } else { 1791 stage = "FAILED"; 1792 } 1793 1794 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 1795 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 1796 mdb_printf("%?p\n", addr); 1797 } else { 1798 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 1799 ZIO_MAXWIDTH - indent, addr, type, stage); 1800 if (zio.io_waiter) 1801 mdb_printf("%-16p ", zio.io_waiter); 1802 else 1803 mdb_printf("%-16s ", "-"); 1804 #ifdef _KERNEL 1805 if (zio_timestamp.io_timestamp != 0) { 1806 mdb_printf("%llums", (mdb_gethrtime() - 1807 zio_timestamp.io_timestamp) / 1808 1000000); 1809 } else { 1810 mdb_printf("%-12s ", "-"); 1811 } 1812 #else 1813 mdb_printf("%-12s ", "-"); 1814 #endif 1815 mdb_printf("\n"); 1816 } 1817 } 1818 1819 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 1820 return (WALK_NEXT); 1821 1822 if (zpa->zpa_type == ZIO_WALK_PARENT) 1823 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 1824 "io_parent_list"); 1825 else 1826 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 1827 "io_child_list"); 1828 1829 zpa->zpa_current_depth++; 1830 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 1831 mdb_warn("failed to walk zio_t children at %p\n", laddr); 1832 return (WALK_ERR); 1833 } 1834 zpa->zpa_current_depth--; 1835 1836 return (WALK_NEXT); 1837 } 1838 1839 /* ARGSUSED */ 1840 static int 1841 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 1842 { 1843 zio_link_t zl; 1844 uintptr_t ziop; 1845 zio_print_args_t *zpa = arg; 1846 1847 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 1848 mdb_warn("failed to read zio_link_t at %p", addr); 1849 return (WALK_ERR); 1850 } 1851 1852 if (zpa->zpa_type == ZIO_WALK_PARENT) 1853 ziop = (uintptr_t)zl.zl_parent; 1854 else 1855 ziop = (uintptr_t)zl.zl_child; 1856 1857 return (zio_print_cb(ziop, arg)); 1858 } 1859 1860 /* ARGSUSED */ 1861 static int 1862 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1863 { 1864 zio_print_args_t zpa = { 0 }; 1865 1866 if (!(flags & DCMD_ADDRSPEC)) 1867 return (DCMD_USAGE); 1868 1869 if (mdb_getopts(argc, argv, 1870 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 1871 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 1872 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, 1873 NULL) != argc) 1874 return (DCMD_USAGE); 1875 1876 zpa.zpa_flags = flags; 1877 if (zpa.zpa_max_depth != 0) { 1878 if (zpa.zpa_type == ZIO_WALK_SELF) 1879 zpa.zpa_type = ZIO_WALK_CHILD; 1880 } else if (zpa.zpa_type != ZIO_WALK_SELF) { 1881 zpa.zpa_min_depth = 1; 1882 zpa.zpa_max_depth = 1; 1883 } 1884 1885 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 1886 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n", 1887 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", 1888 "TIME_ELAPSED"); 1889 } 1890 1891 if (zio_print_cb(addr, &zpa) != WALK_NEXT) 1892 return (DCMD_ERR); 1893 1894 return (DCMD_OK); 1895 } 1896 1897 /* 1898 * [addr]::zio_state 1899 * 1900 * Print a summary of all zio_t structures on the system, or for a particular 1901 * pool. This is equivalent to '::walk zio_root | ::zio'. 1902 */ 1903 /*ARGSUSED*/ 1904 static int 1905 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1906 { 1907 /* 1908 * MDB will remember the last address of the pipeline, so if we don't 1909 * zero this we'll end up trying to walk zio structures for a 1910 * non-existent spa_t. 1911 */ 1912 if (!(flags & DCMD_ADDRSPEC)) 1913 addr = 0; 1914 1915 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 1916 } 1917 1918 typedef struct txg_list_walk_data { 1919 uintptr_t lw_head[TXG_SIZE]; 1920 int lw_txgoff; 1921 int lw_maxoff; 1922 size_t lw_offset; 1923 void *lw_obj; 1924 } txg_list_walk_data_t; 1925 1926 static int 1927 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 1928 { 1929 txg_list_walk_data_t *lwd; 1930 txg_list_t list; 1931 int i; 1932 1933 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 1934 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 1935 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 1936 return (WALK_ERR); 1937 } 1938 1939 for (i = 0; i < TXG_SIZE; i++) 1940 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 1941 lwd->lw_offset = list.tl_offset; 1942 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 1943 UM_SLEEP | UM_GC); 1944 lwd->lw_txgoff = txg; 1945 lwd->lw_maxoff = maxoff; 1946 1947 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1948 wsp->walk_data = lwd; 1949 1950 return (WALK_NEXT); 1951 } 1952 1953 static int 1954 txg_list_walk_init(mdb_walk_state_t *wsp) 1955 { 1956 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 1957 } 1958 1959 static int 1960 txg_list0_walk_init(mdb_walk_state_t *wsp) 1961 { 1962 return (txg_list_walk_init_common(wsp, 0, 0)); 1963 } 1964 1965 static int 1966 txg_list1_walk_init(mdb_walk_state_t *wsp) 1967 { 1968 return (txg_list_walk_init_common(wsp, 1, 1)); 1969 } 1970 1971 static int 1972 txg_list2_walk_init(mdb_walk_state_t *wsp) 1973 { 1974 return (txg_list_walk_init_common(wsp, 2, 2)); 1975 } 1976 1977 static int 1978 txg_list3_walk_init(mdb_walk_state_t *wsp) 1979 { 1980 return (txg_list_walk_init_common(wsp, 3, 3)); 1981 } 1982 1983 static int 1984 txg_list_walk_step(mdb_walk_state_t *wsp) 1985 { 1986 txg_list_walk_data_t *lwd = wsp->walk_data; 1987 uintptr_t addr; 1988 txg_node_t *node; 1989 int status; 1990 1991 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 1992 lwd->lw_txgoff++; 1993 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1994 } 1995 1996 if (wsp->walk_addr == NULL) 1997 return (WALK_DONE); 1998 1999 addr = wsp->walk_addr - lwd->lw_offset; 2000 2001 if (mdb_vread(lwd->lw_obj, 2002 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 2003 mdb_warn("failed to read list element at %#lx", addr); 2004 return (WALK_ERR); 2005 } 2006 2007 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 2008 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 2009 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 2010 2011 return (status); 2012 } 2013 2014 /* 2015 * ::walk spa 2016 * 2017 * Walk all named spa_t structures in the namespace. This is nothing more than 2018 * a layered avl walk. 2019 */ 2020 static int 2021 spa_walk_init(mdb_walk_state_t *wsp) 2022 { 2023 GElf_Sym sym; 2024 2025 if (wsp->walk_addr != NULL) { 2026 mdb_warn("spa walk only supports global walks\n"); 2027 return (WALK_ERR); 2028 } 2029 2030 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 2031 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 2032 return (WALK_ERR); 2033 } 2034 2035 wsp->walk_addr = (uintptr_t)sym.st_value; 2036 2037 if (mdb_layered_walk("avl", wsp) == -1) { 2038 mdb_warn("failed to walk 'avl'\n"); 2039 return (WALK_ERR); 2040 } 2041 2042 return (WALK_NEXT); 2043 } 2044 2045 static int 2046 spa_walk_step(mdb_walk_state_t *wsp) 2047 { 2048 spa_t spa; 2049 2050 if (mdb_vread(&spa, sizeof (spa), wsp->walk_addr) == -1) { 2051 mdb_warn("failed to read spa_t at %p", wsp->walk_addr); 2052 return (WALK_ERR); 2053 } 2054 2055 return (wsp->walk_callback(wsp->walk_addr, &spa, wsp->walk_cbdata)); 2056 } 2057 2058 /* 2059 * [addr]::walk zio 2060 * 2061 * Walk all active zio_t structures on the system. This is simply a layered 2062 * walk on top of ::walk zio_cache, with the optional ability to limit the 2063 * structures to a particular pool. 2064 */ 2065 static int 2066 zio_walk_init(mdb_walk_state_t *wsp) 2067 { 2068 wsp->walk_data = (void *)wsp->walk_addr; 2069 2070 if (mdb_layered_walk("zio_cache", wsp) == -1) { 2071 mdb_warn("failed to walk 'zio_cache'\n"); 2072 return (WALK_ERR); 2073 } 2074 2075 return (WALK_NEXT); 2076 } 2077 2078 static int 2079 zio_walk_step(mdb_walk_state_t *wsp) 2080 { 2081 mdb_zio_t zio; 2082 2083 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2084 wsp->walk_addr, 0) == -1) 2085 return (WALK_ERR); 2086 2087 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 2088 return (WALK_NEXT); 2089 2090 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2091 } 2092 2093 /* 2094 * [addr]::walk zio_root 2095 * 2096 * Walk only root zio_t structures, optionally for a particular spa_t. 2097 */ 2098 static int 2099 zio_walk_root_step(mdb_walk_state_t *wsp) 2100 { 2101 mdb_zio_t zio; 2102 2103 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2104 wsp->walk_addr, 0) == -1) 2105 return (WALK_ERR); 2106 2107 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa) 2108 return (WALK_NEXT); 2109 2110 /* If the parent list is not empty, ignore */ 2111 if ((uintptr_t)zio.io_parent_list.list_head.list_next != 2112 wsp->walk_addr + 2113 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + 2114 mdb_ctf_offsetof_by_name("struct list", "list_head")) 2115 return (WALK_NEXT); 2116 2117 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2118 } 2119 2120 #define NICENUM_BUFLEN 6 2121 2122 static int 2123 snprintfrac(char *buf, int len, 2124 uint64_t numerator, uint64_t denom, int frac_digits) 2125 { 2126 int mul = 1; 2127 int whole, frac, i; 2128 2129 for (i = frac_digits; i; i--) 2130 mul *= 10; 2131 whole = numerator / denom; 2132 frac = mul * numerator / denom - mul * whole; 2133 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); 2134 } 2135 2136 static void 2137 mdb_nicenum(uint64_t num, char *buf) 2138 { 2139 uint64_t n = num; 2140 int index = 0; 2141 char *u; 2142 2143 while (n >= 1024) { 2144 n = (n + (1024 / 2)) / 1024; /* Round up or down */ 2145 index++; 2146 } 2147 2148 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; 2149 2150 if (index == 0) { 2151 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", 2152 (u_longlong_t)n); 2153 } else if (n < 10 && (num & (num - 1)) != 0) { 2154 (void) snprintfrac(buf, NICENUM_BUFLEN, 2155 num, 1ULL << 10 * index, 2); 2156 strcat(buf, u); 2157 } else if (n < 100 && (num & (num - 1)) != 0) { 2158 (void) snprintfrac(buf, NICENUM_BUFLEN, 2159 num, 1ULL << 10 * index, 1); 2160 strcat(buf, u); 2161 } else { 2162 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", 2163 (u_longlong_t)n, u); 2164 } 2165 } 2166 2167 /* 2168 * ::zfs_blkstats 2169 * 2170 * -v print verbose per-level information 2171 * 2172 */ 2173 static int 2174 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2175 { 2176 boolean_t verbose = B_FALSE; 2177 zfs_all_blkstats_t stats; 2178 dmu_object_type_t t; 2179 zfs_blkstat_t *tzb; 2180 uint64_t ditto; 2181 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; 2182 /* +10 in case it grew */ 2183 2184 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { 2185 mdb_warn("failed to read 'dmu_ot'"); 2186 return (DCMD_ERR); 2187 } 2188 2189 if (mdb_getopts(argc, argv, 2190 'v', MDB_OPT_SETBITS, TRUE, &verbose, 2191 NULL) != argc) 2192 return (DCMD_USAGE); 2193 2194 if (!(flags & DCMD_ADDRSPEC)) 2195 return (DCMD_USAGE); 2196 2197 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || 2198 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || 2199 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 2200 mdb_warn("failed to read data at %p;", addr); 2201 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 2202 return (DCMD_ERR); 2203 } 2204 2205 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 2206 if (tzb->zb_gangs != 0) { 2207 mdb_printf("Ganged blocks: %llu\n", 2208 (longlong_t)tzb->zb_gangs); 2209 } 2210 2211 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 2212 tzb->zb_ditto_3_of_3_samevdev; 2213 if (ditto != 0) { 2214 mdb_printf("Dittoed blocks on same vdev: %llu\n", 2215 (longlong_t)ditto); 2216 } 2217 2218 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 2219 "\t avg\t comp\t%%Total\tType\n"); 2220 2221 for (t = 0; t <= DMU_OT_TOTAL; t++) { 2222 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; 2223 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; 2224 char avg[NICENUM_BUFLEN]; 2225 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; 2226 char typename[64]; 2227 int l; 2228 2229 2230 if (t == DMU_OT_DEFERRED) 2231 strcpy(typename, "deferred free"); 2232 else if (t == DMU_OT_OTHER) 2233 strcpy(typename, "other"); 2234 else if (t == DMU_OT_TOTAL) 2235 strcpy(typename, "Total"); 2236 else if (mdb_readstr(typename, sizeof (typename), 2237 (uintptr_t)dmu_ot[t].ot_name) == -1) { 2238 mdb_warn("failed to read type name"); 2239 return (DCMD_ERR); 2240 } 2241 2242 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 2243 continue; 2244 2245 for (l = -1; l < DN_MAX_LEVELS; l++) { 2246 int level = (l == -1 ? DN_MAX_LEVELS : l); 2247 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 2248 2249 if (zb->zb_asize == 0) 2250 continue; 2251 2252 /* 2253 * Don't print each level unless requested. 2254 */ 2255 if (!verbose && level != DN_MAX_LEVELS) 2256 continue; 2257 2258 /* 2259 * If all the space is level 0, don't print the 2260 * level 0 separately. 2261 */ 2262 if (level == 0 && zb->zb_asize == 2263 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 2264 continue; 2265 2266 mdb_nicenum(zb->zb_count, csize); 2267 mdb_nicenum(zb->zb_lsize, lsize); 2268 mdb_nicenum(zb->zb_psize, psize); 2269 mdb_nicenum(zb->zb_asize, asize); 2270 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 2271 (void) snprintfrac(comp, NICENUM_BUFLEN, 2272 zb->zb_lsize, zb->zb_psize, 2); 2273 (void) snprintfrac(pct, NICENUM_BUFLEN, 2274 100 * zb->zb_asize, tzb->zb_asize, 2); 2275 2276 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 2277 "\t%5s\t%6s\t", 2278 csize, lsize, psize, asize, avg, comp, pct); 2279 2280 if (level == DN_MAX_LEVELS) 2281 mdb_printf("%s\n", typename); 2282 else 2283 mdb_printf(" L%d %s\n", 2284 level, typename); 2285 } 2286 } 2287 2288 return (DCMD_OK); 2289 } 2290 2291 /* ARGSUSED */ 2292 static int 2293 reference_cb(uintptr_t addr, const void *ignored, void *arg) 2294 { 2295 static int gotid; 2296 static mdb_ctf_id_t ref_id; 2297 uintptr_t ref_holder; 2298 uintptr_t ref_removed; 2299 uint64_t ref_number; 2300 boolean_t holder_is_str = B_FALSE; 2301 char holder_str[128]; 2302 boolean_t removed = (boolean_t)arg; 2303 2304 if (!gotid) { 2305 if (mdb_ctf_lookup_by_name("struct reference", &ref_id) == -1) { 2306 mdb_warn("couldn't find struct reference"); 2307 return (WALK_ERR); 2308 } 2309 gotid = TRUE; 2310 } 2311 2312 if (GETMEMBID(addr, &ref_id, ref_holder, ref_holder) || 2313 GETMEMBID(addr, &ref_id, ref_removed, ref_removed) || 2314 GETMEMBID(addr, &ref_id, ref_number, ref_number)) 2315 return (WALK_ERR); 2316 2317 if (mdb_readstr(holder_str, sizeof (holder_str), ref_holder) != -1) 2318 holder_is_str = strisprint(holder_str); 2319 2320 if (removed) 2321 mdb_printf("removed "); 2322 mdb_printf("reference "); 2323 if (ref_number != 1) 2324 mdb_printf("with count=%llu ", ref_number); 2325 mdb_printf("with tag %p", (void*)ref_holder); 2326 if (holder_is_str) 2327 mdb_printf(" \"%s\"", holder_str); 2328 mdb_printf(", held at:\n"); 2329 2330 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 2331 2332 if (removed) { 2333 mdb_printf("removed at:\n"); 2334 (void) mdb_call_dcmd("whatis", ref_removed, 2335 DCMD_ADDRSPEC, 0, NULL); 2336 } 2337 2338 mdb_printf("\n"); 2339 2340 return (WALK_NEXT); 2341 } 2342 2343 /* ARGSUSED */ 2344 static int 2345 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2346 { 2347 uint64_t rc_count, rc_removed_count; 2348 uintptr_t rc_list, rc_removed; 2349 static int gotid; 2350 static mdb_ctf_id_t rc_id; 2351 ulong_t off; 2352 boolean_t released = B_FALSE; 2353 2354 if (!(flags & DCMD_ADDRSPEC)) 2355 return (DCMD_USAGE); 2356 2357 if (mdb_getopts(argc, argv, 2358 'r', MDB_OPT_SETBITS, B_TRUE, &released, 2359 NULL) != argc) 2360 return (DCMD_USAGE); 2361 2362 if (!gotid) { 2363 /* 2364 * The refcount structure is different when compiled debug 2365 * vs nondebug. Therefore, we want to make sure we get the 2366 * refcount definition from the ZFS module, in case it has 2367 * been compiled debug but genunix is nondebug. 2368 */ 2369 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "refcount", 2370 &rc_id) == -1) { 2371 mdb_warn("couldn't find struct refcount"); 2372 return (DCMD_ERR); 2373 } 2374 gotid = TRUE; 2375 } 2376 2377 if (GETMEMBID(addr, &rc_id, rc_count, rc_count)) 2378 return (DCMD_ERR); 2379 2380 if (GETMEMBID(addr, &rc_id, rc_removed_count, rc_removed_count)) { 2381 mdb_printf("refcount_t at %p has %llu current holds\n", 2382 addr, (longlong_t)rc_count); 2383 return (DCMD_OK); 2384 } 2385 2386 mdb_printf("refcount_t at %p has %llu current holds, " 2387 "%llu recently released holds\n", 2388 addr, (longlong_t)rc_count, (longlong_t)rc_removed_count); 2389 2390 if (rc_count > 0) 2391 mdb_printf("current holds:\n"); 2392 if (mdb_ctf_offsetof(rc_id, "rc_list", &off) == -1) 2393 return (DCMD_ERR); 2394 rc_list = addr + off/NBBY; 2395 mdb_pwalk("list", reference_cb, (void*)B_FALSE, rc_list); 2396 2397 if (released) { 2398 if (rc_removed_count > 0) 2399 mdb_printf("released holds:\n"); 2400 if (mdb_ctf_offsetof(rc_id, "rc_removed", &off) == -1) 2401 return (DCMD_ERR); 2402 rc_removed = addr + off/NBBY; 2403 mdb_pwalk("list", reference_cb, (void*)B_TRUE, rc_removed); 2404 } 2405 2406 return (DCMD_OK); 2407 } 2408 2409 /* ARGSUSED */ 2410 static int 2411 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2412 { 2413 sa_attr_table_t *table; 2414 sa_os_t sa_os; 2415 char *name; 2416 int i; 2417 2418 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 2419 mdb_warn("failed to read sa_os at %p", addr); 2420 return (DCMD_ERR); 2421 } 2422 2423 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2424 UM_SLEEP | UM_GC); 2425 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 2426 2427 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2428 (uintptr_t)sa_os.sa_attr_table) == -1) { 2429 mdb_warn("failed to read sa_os at %p", addr); 2430 return (DCMD_ERR); 2431 } 2432 2433 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 2434 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 2435 for (i = 0; i != sa_os.sa_num_attrs; i++) { 2436 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 2437 mdb_printf("%5x %8x %8x %8x %-s\n", 2438 (int)table[i].sa_attr, (int)table[i].sa_registered, 2439 (int)table[i].sa_length, table[i].sa_byteswap, name); 2440 } 2441 2442 return (DCMD_OK); 2443 } 2444 2445 static int 2446 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 2447 { 2448 uintptr_t idx_table; 2449 2450 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { 2451 mdb_printf("can't find offset table in sa_idx_tab\n"); 2452 return (-1); 2453 } 2454 2455 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 2456 UM_SLEEP | UM_GC); 2457 2458 if (mdb_vread(*off_tab, 2459 attr_count * sizeof (uint32_t), idx_table) == -1) { 2460 mdb_warn("failed to attribute offset table %p", idx_table); 2461 return (-1); 2462 } 2463 2464 return (DCMD_OK); 2465 } 2466 2467 /*ARGSUSED*/ 2468 static int 2469 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2470 { 2471 uint32_t *offset_tab; 2472 int attr_count; 2473 uint64_t attr_id; 2474 uintptr_t attr_addr; 2475 uintptr_t bonus_tab, spill_tab; 2476 uintptr_t db_bonus, db_spill; 2477 uintptr_t os, os_sa; 2478 uintptr_t db_data; 2479 2480 if (argc != 1) 2481 return (DCMD_USAGE); 2482 2483 if (argv[0].a_type == MDB_TYPE_STRING) 2484 attr_id = mdb_strtoull(argv[0].a_un.a_str); 2485 else 2486 return (DCMD_USAGE); 2487 2488 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || 2489 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || 2490 GETMEMB(addr, "sa_handle", sa_os, os) || 2491 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || 2492 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { 2493 mdb_printf("Can't find necessary information in sa_handle " 2494 "in sa_handle\n"); 2495 return (DCMD_ERR); 2496 } 2497 2498 if (GETMEMB(os, "objset", os_sa, os_sa)) { 2499 mdb_printf("Can't find os_sa in objset\n"); 2500 return (DCMD_ERR); 2501 } 2502 2503 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { 2504 mdb_printf("Can't find sa_num_attrs\n"); 2505 return (DCMD_ERR); 2506 } 2507 2508 if (attr_id > attr_count) { 2509 mdb_printf("attribute id number is out of range\n"); 2510 return (DCMD_ERR); 2511 } 2512 2513 if (bonus_tab) { 2514 if (sa_get_off_table(bonus_tab, &offset_tab, 2515 attr_count) == -1) { 2516 return (DCMD_ERR); 2517 } 2518 2519 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { 2520 mdb_printf("can't find db_data in bonus dbuf\n"); 2521 return (DCMD_ERR); 2522 } 2523 } 2524 2525 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 2526 spill_tab == NULL) { 2527 mdb_printf("Attribute does not exist\n"); 2528 return (DCMD_ERR); 2529 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 2530 if (sa_get_off_table(spill_tab, &offset_tab, 2531 attr_count) == -1) { 2532 return (DCMD_ERR); 2533 } 2534 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { 2535 mdb_printf("can't find db_data in spill dbuf\n"); 2536 return (DCMD_ERR); 2537 } 2538 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 2539 mdb_printf("Attribute does not exist\n"); 2540 return (DCMD_ERR); 2541 } 2542 } 2543 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 2544 mdb_printf("%p\n", attr_addr); 2545 return (DCMD_OK); 2546 } 2547 2548 /* ARGSUSED */ 2549 static int 2550 zfs_ace_print_common(uintptr_t addr, uint_t flags, 2551 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 2552 uint16_t ace_type, int verbose) 2553 { 2554 if (DCMD_HDRSPEC(flags) && !verbose) 2555 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 2556 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 2557 2558 if (!verbose) { 2559 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 2560 ace_flags, access_mask, ace_type, id); 2561 return (DCMD_OK); 2562 } 2563 2564 switch (ace_flags & ACE_TYPE_FLAGS) { 2565 case ACE_OWNER: 2566 mdb_printf("owner@:"); 2567 break; 2568 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2569 mdb_printf("group@:"); 2570 break; 2571 case ACE_EVERYONE: 2572 mdb_printf("everyone@:"); 2573 break; 2574 case ACE_IDENTIFIER_GROUP: 2575 mdb_printf("group:%llx:", (u_longlong_t)id); 2576 break; 2577 case 0: /* User entry */ 2578 mdb_printf("user:%llx:", (u_longlong_t)id); 2579 break; 2580 } 2581 2582 /* print out permission mask */ 2583 if (access_mask & ACE_READ_DATA) 2584 mdb_printf("r"); 2585 else 2586 mdb_printf("-"); 2587 if (access_mask & ACE_WRITE_DATA) 2588 mdb_printf("w"); 2589 else 2590 mdb_printf("-"); 2591 if (access_mask & ACE_EXECUTE) 2592 mdb_printf("x"); 2593 else 2594 mdb_printf("-"); 2595 if (access_mask & ACE_APPEND_DATA) 2596 mdb_printf("p"); 2597 else 2598 mdb_printf("-"); 2599 if (access_mask & ACE_DELETE) 2600 mdb_printf("d"); 2601 else 2602 mdb_printf("-"); 2603 if (access_mask & ACE_DELETE_CHILD) 2604 mdb_printf("D"); 2605 else 2606 mdb_printf("-"); 2607 if (access_mask & ACE_READ_ATTRIBUTES) 2608 mdb_printf("a"); 2609 else 2610 mdb_printf("-"); 2611 if (access_mask & ACE_WRITE_ATTRIBUTES) 2612 mdb_printf("A"); 2613 else 2614 mdb_printf("-"); 2615 if (access_mask & ACE_READ_NAMED_ATTRS) 2616 mdb_printf("R"); 2617 else 2618 mdb_printf("-"); 2619 if (access_mask & ACE_WRITE_NAMED_ATTRS) 2620 mdb_printf("W"); 2621 else 2622 mdb_printf("-"); 2623 if (access_mask & ACE_READ_ACL) 2624 mdb_printf("c"); 2625 else 2626 mdb_printf("-"); 2627 if (access_mask & ACE_WRITE_ACL) 2628 mdb_printf("C"); 2629 else 2630 mdb_printf("-"); 2631 if (access_mask & ACE_WRITE_OWNER) 2632 mdb_printf("o"); 2633 else 2634 mdb_printf("-"); 2635 if (access_mask & ACE_SYNCHRONIZE) 2636 mdb_printf("s"); 2637 else 2638 mdb_printf("-"); 2639 2640 mdb_printf(":"); 2641 2642 /* Print out inheritance flags */ 2643 if (ace_flags & ACE_FILE_INHERIT_ACE) 2644 mdb_printf("f"); 2645 else 2646 mdb_printf("-"); 2647 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 2648 mdb_printf("d"); 2649 else 2650 mdb_printf("-"); 2651 if (ace_flags & ACE_INHERIT_ONLY_ACE) 2652 mdb_printf("i"); 2653 else 2654 mdb_printf("-"); 2655 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 2656 mdb_printf("n"); 2657 else 2658 mdb_printf("-"); 2659 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 2660 mdb_printf("S"); 2661 else 2662 mdb_printf("-"); 2663 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 2664 mdb_printf("F"); 2665 else 2666 mdb_printf("-"); 2667 if (ace_flags & ACE_INHERITED_ACE) 2668 mdb_printf("I"); 2669 else 2670 mdb_printf("-"); 2671 2672 switch (ace_type) { 2673 case ACE_ACCESS_ALLOWED_ACE_TYPE: 2674 mdb_printf(":allow\n"); 2675 break; 2676 case ACE_ACCESS_DENIED_ACE_TYPE: 2677 mdb_printf(":deny\n"); 2678 break; 2679 case ACE_SYSTEM_AUDIT_ACE_TYPE: 2680 mdb_printf(":audit\n"); 2681 break; 2682 case ACE_SYSTEM_ALARM_ACE_TYPE: 2683 mdb_printf(":alarm\n"); 2684 break; 2685 default: 2686 mdb_printf(":?\n"); 2687 } 2688 return (DCMD_OK); 2689 } 2690 2691 /* ARGSUSED */ 2692 static int 2693 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2694 { 2695 zfs_ace_t zace; 2696 int verbose = FALSE; 2697 uint64_t id; 2698 2699 if (!(flags & DCMD_ADDRSPEC)) 2700 return (DCMD_USAGE); 2701 2702 if (mdb_getopts(argc, argv, 2703 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2704 return (DCMD_USAGE); 2705 2706 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 2707 mdb_warn("failed to read zfs_ace_t"); 2708 return (DCMD_ERR); 2709 } 2710 2711 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 2712 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2713 id = zace.z_fuid; 2714 else 2715 id = -1; 2716 2717 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 2718 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 2719 } 2720 2721 /* ARGSUSED */ 2722 static int 2723 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2724 { 2725 ace_t ace; 2726 uint64_t id; 2727 int verbose = FALSE; 2728 2729 if (!(flags & DCMD_ADDRSPEC)) 2730 return (DCMD_USAGE); 2731 2732 if (mdb_getopts(argc, argv, 2733 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2734 return (DCMD_USAGE); 2735 2736 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 2737 mdb_warn("failed to read ace_t"); 2738 return (DCMD_ERR); 2739 } 2740 2741 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 2742 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2743 id = ace.a_who; 2744 else 2745 id = -1; 2746 2747 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 2748 ace.a_flags, ace.a_type, verbose)); 2749 } 2750 2751 typedef struct acl_dump_args { 2752 int a_argc; 2753 const mdb_arg_t *a_argv; 2754 uint16_t a_version; 2755 int a_flags; 2756 } acl_dump_args_t; 2757 2758 /* ARGSUSED */ 2759 static int 2760 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 2761 { 2762 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2763 2764 if (acl_args->a_version == 1) { 2765 if (mdb_call_dcmd("zfs_ace", addr, 2766 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2767 acl_args->a_argv) != DCMD_OK) { 2768 return (WALK_ERR); 2769 } 2770 } else { 2771 if (mdb_call_dcmd("zfs_ace0", addr, 2772 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2773 acl_args->a_argv) != DCMD_OK) { 2774 return (WALK_ERR); 2775 } 2776 } 2777 acl_args->a_flags = DCMD_LOOP; 2778 return (WALK_NEXT); 2779 } 2780 2781 /* ARGSUSED */ 2782 static int 2783 acl_cb(uintptr_t addr, const void *unknown, void *arg) 2784 { 2785 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2786 2787 if (acl_args->a_version == 1) { 2788 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 2789 arg, addr) != 0) { 2790 mdb_warn("can't walk ACEs"); 2791 return (DCMD_ERR); 2792 } 2793 } else { 2794 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 2795 arg, addr) != 0) { 2796 mdb_warn("can't walk ACEs"); 2797 return (DCMD_ERR); 2798 } 2799 } 2800 return (WALK_NEXT); 2801 } 2802 2803 /* ARGSUSED */ 2804 static int 2805 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2806 { 2807 zfs_acl_t zacl; 2808 int verbose = FALSE; 2809 acl_dump_args_t acl_args; 2810 2811 if (!(flags & DCMD_ADDRSPEC)) 2812 return (DCMD_USAGE); 2813 2814 if (mdb_getopts(argc, argv, 2815 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2816 return (DCMD_USAGE); 2817 2818 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 2819 mdb_warn("failed to read zfs_acl_t"); 2820 return (DCMD_ERR); 2821 } 2822 2823 acl_args.a_argc = argc; 2824 acl_args.a_argv = argv; 2825 acl_args.a_version = zacl.z_version; 2826 acl_args.a_flags = DCMD_LOOPFIRST; 2827 2828 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 2829 mdb_warn("can't walk ACL"); 2830 return (DCMD_ERR); 2831 } 2832 2833 return (DCMD_OK); 2834 } 2835 2836 /* ARGSUSED */ 2837 static int 2838 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 2839 { 2840 if (wsp->walk_addr == NULL) { 2841 mdb_warn("must supply address of zfs_acl_node_t\n"); 2842 return (WALK_ERR); 2843 } 2844 2845 wsp->walk_addr += 2846 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); 2847 2848 if (mdb_layered_walk("list", wsp) == -1) { 2849 mdb_warn("failed to walk 'list'\n"); 2850 return (WALK_ERR); 2851 } 2852 2853 return (WALK_NEXT); 2854 } 2855 2856 static int 2857 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 2858 { 2859 zfs_acl_node_t aclnode; 2860 2861 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 2862 wsp->walk_addr) == -1) { 2863 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 2864 return (WALK_ERR); 2865 } 2866 2867 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 2868 } 2869 2870 typedef struct ace_walk_data { 2871 int ace_count; 2872 int ace_version; 2873 } ace_walk_data_t; 2874 2875 static int 2876 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 2877 int ace_count, uintptr_t ace_data) 2878 { 2879 ace_walk_data_t *ace_walk_data; 2880 2881 if (wsp->walk_addr == NULL) { 2882 mdb_warn("must supply address of zfs_acl_node_t\n"); 2883 return (WALK_ERR); 2884 } 2885 2886 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 2887 2888 ace_walk_data->ace_count = ace_count; 2889 ace_walk_data->ace_version = version; 2890 2891 wsp->walk_addr = ace_data; 2892 wsp->walk_data = ace_walk_data; 2893 2894 return (WALK_NEXT); 2895 } 2896 2897 static int 2898 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 2899 { 2900 static int gotid; 2901 static mdb_ctf_id_t acl_id; 2902 int z_ace_count; 2903 uintptr_t z_acldata; 2904 2905 if (!gotid) { 2906 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 2907 &acl_id) == -1) { 2908 mdb_warn("couldn't find struct zfs_acl_node"); 2909 return (DCMD_ERR); 2910 } 2911 gotid = TRUE; 2912 } 2913 2914 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 2915 return (DCMD_ERR); 2916 } 2917 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 2918 return (DCMD_ERR); 2919 } 2920 2921 return (zfs_aces_walk_init_common(wsp, version, 2922 z_ace_count, z_acldata)); 2923 } 2924 2925 /* ARGSUSED */ 2926 static int 2927 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 2928 { 2929 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 2930 } 2931 2932 /* ARGSUSED */ 2933 static int 2934 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 2935 { 2936 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 2937 } 2938 2939 static int 2940 zfs_aces_walk_step(mdb_walk_state_t *wsp) 2941 { 2942 ace_walk_data_t *ace_data = wsp->walk_data; 2943 zfs_ace_t zace; 2944 ace_t *acep; 2945 int status; 2946 int entry_type; 2947 int allow_type; 2948 uintptr_t ptr; 2949 2950 if (ace_data->ace_count == 0) 2951 return (WALK_DONE); 2952 2953 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 2954 mdb_warn("failed to read zfs_ace_t at %#lx", 2955 wsp->walk_addr); 2956 return (WALK_ERR); 2957 } 2958 2959 switch (ace_data->ace_version) { 2960 case 0: 2961 acep = (ace_t *)&zace; 2962 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 2963 allow_type = acep->a_type; 2964 break; 2965 case 1: 2966 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 2967 allow_type = zace.z_hdr.z_type; 2968 break; 2969 default: 2970 return (WALK_ERR); 2971 } 2972 2973 ptr = (uintptr_t)wsp->walk_addr; 2974 switch (entry_type) { 2975 case ACE_OWNER: 2976 case ACE_EVERYONE: 2977 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2978 ptr += ace_data->ace_version == 0 ? 2979 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 2980 break; 2981 case ACE_IDENTIFIER_GROUP: 2982 default: 2983 switch (allow_type) { 2984 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 2985 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 2986 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 2987 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 2988 ptr += ace_data->ace_version == 0 ? 2989 sizeof (ace_t) : sizeof (zfs_object_ace_t); 2990 break; 2991 default: 2992 ptr += ace_data->ace_version == 0 ? 2993 sizeof (ace_t) : sizeof (zfs_ace_t); 2994 break; 2995 } 2996 } 2997 2998 ace_data->ace_count--; 2999 status = wsp->walk_callback(wsp->walk_addr, 3000 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 3001 3002 wsp->walk_addr = ptr; 3003 return (status); 3004 } 3005 3006 typedef struct mdb_zfs_rrwlock { 3007 kthread_t *rr_writer; 3008 boolean_t rr_writer_wanted; 3009 } mdb_zfs_rrwlock_t; 3010 3011 static uint_t rrw_key; 3012 3013 /* ARGSUSED */ 3014 static int 3015 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3016 { 3017 mdb_zfs_rrwlock_t rrw; 3018 3019 if (rrw_key == 0) { 3020 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) 3021 return (DCMD_ERR); 3022 } 3023 3024 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 3025 0) == -1) 3026 return (DCMD_ERR); 3027 3028 if (rrw.rr_writer != NULL) { 3029 mdb_printf("write lock held by thread %p\n", rrw.rr_writer); 3030 return (DCMD_OK); 3031 } 3032 3033 if (rrw.rr_writer_wanted) { 3034 mdb_printf("writer wanted\n"); 3035 } 3036 3037 mdb_printf("anonymous references:\n"); 3038 (void) mdb_call_dcmd("refcount", addr + 3039 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), 3040 DCMD_ADDRSPEC, 0, NULL); 3041 3042 mdb_printf("linked references:\n"); 3043 (void) mdb_call_dcmd("refcount", addr + 3044 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), 3045 DCMD_ADDRSPEC, 0, NULL); 3046 3047 /* 3048 * XXX This should find references from 3049 * "::walk thread | ::tsd -v <rrw_key>", but there is no support 3050 * for programmatic consumption of dcmds, so this would be 3051 * difficult, potentially requiring reimplementing ::tsd (both 3052 * user and kernel versions) in this MDB module. 3053 */ 3054 3055 return (DCMD_OK); 3056 } 3057 3058 /* 3059 * MDB module linkage information: 3060 * 3061 * We declare a list of structures describing our dcmds, and a function 3062 * named _mdb_init to return a pointer to our module information. 3063 */ 3064 3065 static const mdb_dcmd_t dcmds[] = { 3066 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 3067 { "blkptr", ":", "print blkptr_t", blkptr }, 3068 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 3069 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 3070 { "dbufs", 3071 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 3072 "[-o object | \"mdn\"] \n" 3073 "\t[-l level] [-b blkid | \"bonus\"]", 3074 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 3075 { "abuf_find", "dva_word[0] dva_word[1]", 3076 "find arc_buf_hdr_t of a specified DVA", 3077 abuf_find }, 3078 { "spa", "?[-cv]", "spa_t summary", spa_print }, 3079 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 3080 { "spa_verify", ":", "verify spa_t consistency", spa_verify }, 3081 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 3082 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs }, 3083 { "vdev", ":[-re]\n" 3084 "\t-r display recursively\n" 3085 "\t-e print statistics", 3086 "vdev_t summary", vdev_print }, 3087 { "zio", ":[cpr]\n" 3088 "\t-c display children\n" 3089 "\t-p display parents\n" 3090 "\t-r display recursively", 3091 "zio_t summary", zio_print }, 3092 { "zio_state", "?", "print out all zio_t structures on system or " 3093 "for a particular pool", zio_state }, 3094 { "zfs_blkstats", ":[-v]", 3095 "given a spa_t, print block type stats from last scrub", 3096 zfs_blkstats }, 3097 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 3098 { "refcount", ":[-r]\n" 3099 "\t-r display recently removed references", 3100 "print refcount_t holders", refcount }, 3101 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 3102 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 3103 zfs_acl_dump }, 3104 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 3105 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 3106 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 3107 sa_attr_table}, 3108 { "sa_attr", ": attr_id", 3109 "print SA attribute address when given sa_handle_t", sa_attr_print}, 3110 { "zfs_dbgmsg", ":[-va]", 3111 "print zfs debug log", dbgmsg}, 3112 { "rrwlock", ":", 3113 "print rrwlock_t, including readers", rrwlock}, 3114 { NULL } 3115 }; 3116 3117 static const mdb_walker_t walkers[] = { 3118 { "zms_freelist", "walk ZFS metaslab freelist", 3119 freelist_walk_init, freelist_walk_step, NULL }, 3120 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 3121 txg_list_walk_init, txg_list_walk_step, NULL }, 3122 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 3123 txg_list0_walk_init, txg_list_walk_step, NULL }, 3124 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 3125 txg_list1_walk_init, txg_list_walk_step, NULL }, 3126 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 3127 txg_list2_walk_init, txg_list_walk_step, NULL }, 3128 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 3129 txg_list3_walk_init, txg_list_walk_step, NULL }, 3130 { "zio", "walk all zio structures, optionally for a particular spa_t", 3131 zio_walk_init, zio_walk_step, NULL }, 3132 { "zio_root", 3133 "walk all root zio_t structures, optionally for a particular spa_t", 3134 zio_walk_init, zio_walk_root_step, NULL }, 3135 { "spa", "walk all spa_t entries in the namespace", 3136 spa_walk_init, spa_walk_step, NULL }, 3137 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 3138 metaslab_walk_init, metaslab_walk_step, NULL }, 3139 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 3140 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 3141 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 3142 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 3143 { "zfs_acl_node_aces0", 3144 "given a zfs_acl_node_t, walk all ACEs as ace_t", 3145 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 3146 { NULL } 3147 }; 3148 3149 static const mdb_modinfo_t modinfo = { 3150 MDB_API_VERSION, dcmds, walkers 3151 }; 3152 3153 const mdb_modinfo_t * 3154 _mdb_init(void) 3155 { 3156 return (&modinfo); 3157 } 3158