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/vdev_impl.h> 40 #include <sys/zap_leaf.h> 41 #include <sys/zap_impl.h> 42 #include <ctype.h> 43 #include <sys/zfs_acl.h> 44 #include <sys/sa_impl.h> 45 46 #ifdef _KERNEL 47 #define ZFS_OBJ_NAME "zfs" 48 extern int64_t mdb_gethrtime(void); 49 #else 50 #define ZFS_OBJ_NAME "libzpool.so.1" 51 #endif 52 53 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`" 54 55 #ifndef _KERNEL 56 int aok; 57 #endif 58 59 static int 60 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 61 const char *member, int len, void *buf) 62 { 63 mdb_ctf_id_t id; 64 ulong_t off; 65 char name[64]; 66 67 if (idp == NULL) { 68 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 69 mdb_warn("couldn't find type %s", type); 70 return (DCMD_ERR); 71 } 72 idp = &id; 73 } else { 74 type = name; 75 mdb_ctf_type_name(*idp, name, sizeof (name)); 76 } 77 78 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 79 mdb_warn("couldn't find member %s of type %s\n", member, type); 80 return (DCMD_ERR); 81 } 82 if (off % 8 != 0) { 83 mdb_warn("member %s of type %s is unsupported bitfield", 84 member, type); 85 return (DCMD_ERR); 86 } 87 off /= 8; 88 89 if (mdb_vread(buf, len, addr + off) == -1) { 90 mdb_warn("failed to read %s from %s at %p", 91 member, type, addr + off); 92 return (DCMD_ERR); 93 } 94 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 95 96 return (0); 97 } 98 99 #define GETMEMB(addr, structname, member, dest) \ 100 getmember(addr, ZFS_STRUCT structname, NULL, #member, \ 101 sizeof (dest), &(dest)) 102 103 #define GETMEMBID(addr, ctfid, member, dest) \ 104 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 105 106 static boolean_t 107 strisprint(const char *cp) 108 { 109 for (; *cp; cp++) { 110 if (!isprint(*cp)) 111 return (B_FALSE); 112 } 113 return (B_TRUE); 114 } 115 116 static int verbose; 117 118 static int 119 freelist_walk_init(mdb_walk_state_t *wsp) 120 { 121 if (wsp->walk_addr == NULL) { 122 mdb_warn("must supply starting address\n"); 123 return (WALK_ERR); 124 } 125 126 wsp->walk_data = 0; /* Index into the freelist */ 127 return (WALK_NEXT); 128 } 129 130 static int 131 freelist_walk_step(mdb_walk_state_t *wsp) 132 { 133 uint64_t entry; 134 uintptr_t number = (uintptr_t)wsp->walk_data; 135 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID", 136 "INVALID", "INVALID", "INVALID", "INVALID" }; 137 int mapshift = SPA_MINBLOCKSHIFT; 138 139 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) { 140 mdb_warn("failed to read freelist entry %p", wsp->walk_addr); 141 return (WALK_DONE); 142 } 143 wsp->walk_addr += sizeof (entry); 144 wsp->walk_data = (void *)(number + 1); 145 146 if (SM_DEBUG_DECODE(entry)) { 147 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n", 148 number, 149 ddata[SM_DEBUG_ACTION_DECODE(entry)], 150 SM_DEBUG_TXG_DECODE(entry), 151 SM_DEBUG_SYNCPASS_DECODE(entry)); 152 } else { 153 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c " 154 "size=%06llx", number, 155 SM_OFFSET_DECODE(entry) << mapshift, 156 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) << 157 mapshift, 158 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F', 159 SM_RUN_DECODE(entry) << mapshift); 160 if (verbose) 161 mdb_printf(" (raw=%012llx)\n", entry); 162 mdb_printf("\n"); 163 } 164 return (WALK_NEXT); 165 } 166 167 static int 168 mdb_dsl_dir_name(uintptr_t addr, char *buf) 169 { 170 static int gotid; 171 static mdb_ctf_id_t dd_id; 172 uintptr_t dd_parent; 173 char dd_myname[MAXNAMELEN]; 174 175 if (!gotid) { 176 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir", 177 &dd_id) == -1) { 178 mdb_warn("couldn't find struct dsl_dir"); 179 return (DCMD_ERR); 180 } 181 gotid = TRUE; 182 } 183 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 184 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 185 return (DCMD_ERR); 186 } 187 188 if (dd_parent) { 189 if (mdb_dsl_dir_name(dd_parent, buf)) 190 return (DCMD_ERR); 191 strcat(buf, "/"); 192 } 193 194 if (dd_myname[0]) 195 strcat(buf, dd_myname); 196 else 197 strcat(buf, "???"); 198 199 return (0); 200 } 201 202 static int 203 objset_name(uintptr_t addr, char *buf) 204 { 205 static int gotid; 206 static mdb_ctf_id_t os_id, ds_id; 207 uintptr_t os_dsl_dataset; 208 char ds_snapname[MAXNAMELEN]; 209 uintptr_t ds_dir; 210 211 buf[0] = '\0'; 212 213 if (!gotid) { 214 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset", 215 &os_id) == -1) { 216 mdb_warn("couldn't find struct objset"); 217 return (DCMD_ERR); 218 } 219 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset", 220 &ds_id) == -1) { 221 mdb_warn("couldn't find struct dsl_dataset"); 222 return (DCMD_ERR); 223 } 224 225 gotid = TRUE; 226 } 227 228 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset)) 229 return (DCMD_ERR); 230 231 if (os_dsl_dataset == 0) { 232 strcat(buf, "mos"); 233 return (0); 234 } 235 236 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 237 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 238 return (DCMD_ERR); 239 } 240 241 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf)) 242 return (DCMD_ERR); 243 244 if (ds_snapname[0]) { 245 strcat(buf, "@"); 246 strcat(buf, ds_snapname); 247 } 248 return (0); 249 } 250 251 static void 252 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val, 253 const char *prefix) 254 { 255 const char *cp; 256 size_t len = strlen(prefix); 257 258 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) { 259 if (strncmp(cp, prefix, len) == 0) 260 cp += len; 261 (void) strncpy(out, cp, size); 262 } else { 263 mdb_snprintf(out, size, "? (%d)", val); 264 } 265 } 266 267 /* ARGSUSED */ 268 static int 269 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 270 { 271 /* 272 * This table can be approximately generated by running: 273 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 274 */ 275 static const char *params[] = { 276 "arc_reduce_dnlc_percent", 277 "zfs_arc_max", 278 "zfs_arc_min", 279 "arc_shrink_shift", 280 "zfs_mdcomp_disable", 281 "zfs_prefetch_disable", 282 "zfetch_max_streams", 283 "zfetch_min_sec_reap", 284 "zfetch_block_cap", 285 "zfetch_array_rd_sz", 286 "zfs_default_bs", 287 "zfs_default_ibs", 288 "metaslab_aliquot", 289 "reference_tracking_enable", 290 "reference_history", 291 "spa_max_replication_override", 292 "spa_mode_global", 293 "zfs_flags", 294 "zfs_txg_synctime_ms", 295 "zfs_txg_timeout", 296 "zfs_write_limit_min", 297 "zfs_write_limit_max", 298 "zfs_write_limit_shift", 299 "zfs_write_limit_override", 300 "zfs_no_write_throttle", 301 "zfs_vdev_cache_max", 302 "zfs_vdev_cache_size", 303 "zfs_vdev_cache_bshift", 304 "vdev_mirror_shift", 305 "zfs_vdev_max_pending", 306 "zfs_vdev_min_pending", 307 "zfs_scrub_limit", 308 "zfs_no_scrub_io", 309 "zfs_no_scrub_prefetch", 310 "zfs_vdev_time_shift", 311 "zfs_vdev_ramp_rate", 312 "zfs_vdev_aggregation_limit", 313 "fzap_default_block_shift", 314 "zfs_immediate_write_sz", 315 "zfs_read_chunk_size", 316 "zfs_nocacheflush", 317 "zil_replay_disable", 318 "metaslab_gang_bang", 319 "metaslab_df_alloc_threshold", 320 "metaslab_df_free_pct", 321 "zio_injection_enabled", 322 "zvol_immediate_write_sz", 323 }; 324 325 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 326 int sz; 327 uint64_t val64; 328 uint32_t *val32p = (uint32_t *)&val64; 329 330 sz = mdb_readvar(&val64, params[i]); 331 if (sz == 4) { 332 mdb_printf("%s = 0x%x\n", params[i], *val32p); 333 } else if (sz == 8) { 334 mdb_printf("%s = 0x%llx\n", params[i], val64); 335 } else { 336 mdb_warn("variable %s not found", params[i]); 337 } 338 } 339 340 return (DCMD_OK); 341 } 342 343 /* ARGSUSED */ 344 static int 345 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 346 { 347 mdb_ctf_id_t type_enum, checksum_enum, compress_enum; 348 char type[80], checksum[80], compress[80]; 349 blkptr_t blk, *bp = &blk; 350 char buf[BP_SPRINTF_LEN]; 351 352 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { 353 mdb_warn("failed to read blkptr_t"); 354 return (DCMD_ERR); 355 } 356 357 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 || 358 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 || 359 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) { 360 mdb_warn("Could not find blkptr enumerated types"); 361 return (DCMD_ERR); 362 } 363 364 enum_lookup(type, sizeof (type), type_enum, 365 BP_GET_TYPE(bp), "DMU_OT_"); 366 enum_lookup(checksum, sizeof (checksum), checksum_enum, 367 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_"); 368 enum_lookup(compress, sizeof (compress), compress_enum, 369 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_"); 370 371 SPRINTF_BLKPTR(mdb_snprintf, '\n', buf, bp, type, checksum, compress); 372 373 mdb_printf("%s\n", buf); 374 375 return (DCMD_OK); 376 } 377 378 typedef struct mdb_dmu_buf_impl { 379 struct { 380 uint64_t db_object; 381 } db; 382 uintptr_t db_objset; 383 uint64_t db_level; 384 uint64_t db_blkid; 385 struct { 386 uint64_t rc_count; 387 } db_holds; 388 } mdb_dmu_buf_impl_t; 389 390 /* ARGSUSED */ 391 static int 392 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 393 { 394 mdb_dmu_buf_impl_t db; 395 char objectname[32]; 396 char blkidname[32]; 397 char path[MAXNAMELEN]; 398 399 if (DCMD_HDRSPEC(flags)) 400 mdb_printf(" addr object lvl blkid holds os\n"); 401 402 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 403 addr, 0) == -1) 404 return (DCMD_ERR); 405 406 if (db.db.db_object == DMU_META_DNODE_OBJECT) 407 (void) strcpy(objectname, "mdn"); 408 else 409 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 410 (u_longlong_t)db.db.db_object); 411 412 if (db.db_blkid == DMU_BONUS_BLKID) 413 (void) strcpy(blkidname, "bonus"); 414 else 415 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 416 (u_longlong_t)db.db_blkid); 417 418 if (objset_name(db.db_objset, path)) { 419 return (DCMD_ERR); 420 } 421 422 mdb_printf("%p %8s %1u %9s %2llu %s\n", addr, 423 objectname, (int)db.db_level, blkidname, 424 db.db_holds.rc_count, path); 425 426 return (DCMD_OK); 427 } 428 429 /* ARGSUSED */ 430 static int 431 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 432 { 433 #define HISTOSZ 32 434 uintptr_t dbp; 435 dmu_buf_impl_t db; 436 dbuf_hash_table_t ht; 437 uint64_t bucket, ndbufs; 438 uint64_t histo[HISTOSZ]; 439 uint64_t histo2[HISTOSZ]; 440 int i, maxidx; 441 442 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 443 mdb_warn("failed to read 'dbuf_hash_table'"); 444 return (DCMD_ERR); 445 } 446 447 for (i = 0; i < HISTOSZ; i++) { 448 histo[i] = 0; 449 histo2[i] = 0; 450 } 451 452 ndbufs = 0; 453 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 454 int len; 455 456 if (mdb_vread(&dbp, sizeof (void *), 457 (uintptr_t)(ht.hash_table+bucket)) == -1) { 458 mdb_warn("failed to read hash bucket %u at %p", 459 bucket, ht.hash_table+bucket); 460 return (DCMD_ERR); 461 } 462 463 len = 0; 464 while (dbp != 0) { 465 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 466 dbp) == -1) { 467 mdb_warn("failed to read dbuf at %p", dbp); 468 return (DCMD_ERR); 469 } 470 dbp = (uintptr_t)db.db_hash_next; 471 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 472 histo2[i]++; 473 len++; 474 ndbufs++; 475 } 476 477 if (len >= HISTOSZ) 478 len = HISTOSZ-1; 479 histo[len]++; 480 } 481 482 mdb_printf("hash table has %llu buckets, %llu dbufs " 483 "(avg %llu buckets/dbuf)\n", 484 ht.hash_table_mask+1, ndbufs, 485 (ht.hash_table_mask+1)/ndbufs); 486 487 mdb_printf("\n"); 488 maxidx = 0; 489 for (i = 0; i < HISTOSZ; i++) 490 if (histo[i] > 0) 491 maxidx = i; 492 mdb_printf("hash chain length number of buckets\n"); 493 for (i = 0; i <= maxidx; i++) 494 mdb_printf("%u %llu\n", i, histo[i]); 495 496 mdb_printf("\n"); 497 maxidx = 0; 498 for (i = 0; i < HISTOSZ; i++) 499 if (histo2[i] > 0) 500 maxidx = i; 501 mdb_printf("hash chain depth number of dbufs\n"); 502 for (i = 0; i <= maxidx; i++) 503 mdb_printf("%u or more %llu %llu%%\n", 504 i, histo2[i], histo2[i]*100/ndbufs); 505 506 507 return (DCMD_OK); 508 } 509 510 #define CHAIN_END 0xffff 511 /* 512 * ::zap_leaf [-v] 513 * 514 * Print a zap_leaf_phys_t, assumed to be 16k 515 */ 516 /* ARGSUSED */ 517 static int 518 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 519 { 520 char buf[16*1024]; 521 int verbose = B_FALSE; 522 int four = B_FALSE; 523 zap_leaf_t l; 524 zap_leaf_phys_t *zlp = (void *)buf; 525 int i; 526 527 if (mdb_getopts(argc, argv, 528 'v', MDB_OPT_SETBITS, TRUE, &verbose, 529 '4', MDB_OPT_SETBITS, TRUE, &four, 530 NULL) != argc) 531 return (DCMD_USAGE); 532 533 l.l_phys = zlp; 534 l.l_bs = 14; /* assume 16k blocks */ 535 if (four) 536 l.l_bs = 12; 537 538 if (!(flags & DCMD_ADDRSPEC)) { 539 return (DCMD_USAGE); 540 } 541 542 if (mdb_vread(buf, sizeof (buf), addr) == -1) { 543 mdb_warn("failed to read zap_leaf_phys_t at %p", addr); 544 return (DCMD_ERR); 545 } 546 547 if (zlp->l_hdr.lh_block_type != ZBT_LEAF || 548 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { 549 mdb_warn("This does not appear to be a zap_leaf_phys_t"); 550 return (DCMD_ERR); 551 } 552 553 mdb_printf("zap_leaf_phys_t at %p:\n", addr); 554 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); 555 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); 556 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); 557 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, 558 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); 559 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); 560 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, 561 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? 562 "ENTRIES_CDSORTED" : ""); 563 564 if (verbose) { 565 mdb_printf(" hash table:\n"); 566 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { 567 if (zlp->l_hash[i] != CHAIN_END) 568 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); 569 } 570 } 571 572 mdb_printf(" chunks:\n"); 573 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { 574 /* LINTED: alignment */ 575 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); 576 switch (zlc->l_entry.le_type) { 577 case ZAP_CHUNK_FREE: 578 if (verbose) { 579 mdb_printf(" %u: free; lf_next = %u\n", 580 i, zlc->l_free.lf_next); 581 } 582 break; 583 case ZAP_CHUNK_ENTRY: 584 mdb_printf(" %u: entry\n", i); 585 if (verbose) { 586 mdb_printf(" le_next = %u\n", 587 zlc->l_entry.le_next); 588 } 589 mdb_printf(" le_name_chunk = %u\n", 590 zlc->l_entry.le_name_chunk); 591 mdb_printf(" le_name_numints = %u\n", 592 zlc->l_entry.le_name_numints); 593 mdb_printf(" le_value_chunk = %u\n", 594 zlc->l_entry.le_value_chunk); 595 mdb_printf(" le_value_intlen = %u\n", 596 zlc->l_entry.le_value_intlen); 597 mdb_printf(" le_value_numints = %u\n", 598 zlc->l_entry.le_value_numints); 599 mdb_printf(" le_cd = %u\n", 600 zlc->l_entry.le_cd); 601 mdb_printf(" le_hash = %llx\n", 602 zlc->l_entry.le_hash); 603 break; 604 case ZAP_CHUNK_ARRAY: 605 mdb_printf(" %u: array", i); 606 if (strisprint((char *)zlc->l_array.la_array)) 607 mdb_printf(" \"%s\"", zlc->l_array.la_array); 608 mdb_printf("\n"); 609 if (verbose) { 610 int j; 611 mdb_printf(" "); 612 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { 613 mdb_printf("%02x ", 614 zlc->l_array.la_array[j]); 615 } 616 mdb_printf("\n"); 617 } 618 if (zlc->l_array.la_next != CHAIN_END) { 619 mdb_printf(" lf_next = %u\n", 620 zlc->l_array.la_next); 621 } 622 break; 623 default: 624 mdb_printf(" %u: undefined type %u\n", 625 zlc->l_entry.le_type); 626 } 627 } 628 629 return (DCMD_OK); 630 } 631 632 typedef struct dbufs_data { 633 mdb_ctf_id_t id; 634 uint64_t objset; 635 uint64_t object; 636 uint64_t level; 637 uint64_t blkid; 638 char *osname; 639 } dbufs_data_t; 640 641 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 642 643 /* ARGSUSED */ 644 static int 645 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 646 { 647 dbufs_data_t *data = arg; 648 uintptr_t objset; 649 dmu_buf_t db; 650 uint8_t level; 651 uint64_t blkid; 652 char osname[MAXNAMELEN]; 653 654 if (GETMEMBID(addr, &data->id, db_objset, objset) || 655 GETMEMBID(addr, &data->id, db, db) || 656 GETMEMBID(addr, &data->id, db_level, level) || 657 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 658 return (WALK_ERR); 659 } 660 661 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 662 (data->osname == NULL || (objset_name(objset, osname) == 0 && 663 strcmp(data->osname, osname) == 0)) && 664 (data->object == DBUFS_UNSET || data->object == db.db_object) && 665 (data->level == DBUFS_UNSET || data->level == level) && 666 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 667 mdb_printf("%#lr\n", addr); 668 } 669 return (WALK_NEXT); 670 } 671 672 /* ARGSUSED */ 673 static int 674 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 675 { 676 dbufs_data_t data; 677 char *object = NULL; 678 char *blkid = NULL; 679 680 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 681 data.osname = NULL; 682 683 if (mdb_getopts(argc, argv, 684 'O', MDB_OPT_UINT64, &data.objset, 685 'n', MDB_OPT_STR, &data.osname, 686 'o', MDB_OPT_STR, &object, 687 'l', MDB_OPT_UINT64, &data.level, 688 'b', MDB_OPT_STR, &blkid) != argc) { 689 return (DCMD_USAGE); 690 } 691 692 if (object) { 693 if (strcmp(object, "mdn") == 0) { 694 data.object = DMU_META_DNODE_OBJECT; 695 } else { 696 data.object = mdb_strtoull(object); 697 } 698 } 699 700 if (blkid) { 701 if (strcmp(blkid, "bonus") == 0) { 702 data.blkid = DMU_BONUS_BLKID; 703 } else { 704 data.blkid = mdb_strtoull(blkid); 705 } 706 } 707 708 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) { 709 mdb_warn("couldn't find struct dmu_buf_impl_t"); 710 return (DCMD_ERR); 711 } 712 713 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 714 mdb_warn("can't walk dbufs"); 715 return (DCMD_ERR); 716 } 717 718 return (DCMD_OK); 719 } 720 721 typedef struct abuf_find_data { 722 dva_t dva; 723 mdb_ctf_id_t id; 724 } abuf_find_data_t; 725 726 /* ARGSUSED */ 727 static int 728 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 729 { 730 abuf_find_data_t *data = arg; 731 dva_t dva; 732 733 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 734 return (WALK_ERR); 735 } 736 737 if (dva.dva_word[0] == data->dva.dva_word[0] && 738 dva.dva_word[1] == data->dva.dva_word[1]) { 739 mdb_printf("%#lr\n", addr); 740 } 741 return (WALK_NEXT); 742 } 743 744 /* ARGSUSED */ 745 static int 746 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 747 { 748 abuf_find_data_t data; 749 GElf_Sym sym; 750 int i; 751 const char *syms[] = { 752 "ARC_mru", 753 "ARC_mru_ghost", 754 "ARC_mfu", 755 "ARC_mfu_ghost", 756 }; 757 758 if (argc != 2) 759 return (DCMD_USAGE); 760 761 for (i = 0; i < 2; i ++) { 762 switch (argv[i].a_type) { 763 case MDB_TYPE_STRING: 764 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 765 break; 766 case MDB_TYPE_IMMEDIATE: 767 data.dva.dva_word[i] = argv[i].a_un.a_val; 768 break; 769 default: 770 return (DCMD_USAGE); 771 } 772 } 773 774 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) { 775 mdb_warn("couldn't find struct arc_buf_hdr"); 776 return (DCMD_ERR); 777 } 778 779 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 780 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) { 781 mdb_warn("can't find symbol %s", syms[i]); 782 return (DCMD_ERR); 783 } 784 785 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 786 mdb_warn("can't walk %s", syms[i]); 787 return (DCMD_ERR); 788 } 789 } 790 791 return (DCMD_OK); 792 } 793 794 795 typedef struct dbgmsg_arg { 796 boolean_t da_verbose; 797 boolean_t da_address; 798 } dbgmsg_arg_t; 799 800 /* ARGSUSED */ 801 static int 802 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 803 { 804 static mdb_ctf_id_t id; 805 static boolean_t gotid; 806 static ulong_t off; 807 808 dbgmsg_arg_t *da = arg; 809 time_t timestamp; 810 char buf[1024]; 811 812 if (!gotid) { 813 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == 814 -1) { 815 mdb_warn("couldn't find struct zfs_dbgmsg"); 816 return (WALK_ERR); 817 } 818 gotid = TRUE; 819 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 820 mdb_warn("couldn't find zdm_msg"); 821 return (WALK_ERR); 822 } 823 off /= 8; 824 } 825 826 827 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 828 return (WALK_ERR); 829 } 830 831 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 832 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 833 return (DCMD_ERR); 834 } 835 836 if (da->da_address) 837 mdb_printf("%p ", addr); 838 if (da->da_verbose) 839 mdb_printf("%Y ", timestamp); 840 841 mdb_printf("%s\n", buf); 842 843 if (da->da_verbose) 844 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 845 846 return (WALK_NEXT); 847 } 848 849 /* ARGSUSED */ 850 static int 851 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 852 { 853 GElf_Sym sym; 854 dbgmsg_arg_t da = { 0 }; 855 856 if (mdb_getopts(argc, argv, 857 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 858 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, 859 NULL) != argc) 860 return (DCMD_USAGE); 861 862 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { 863 mdb_warn("can't find zfs_dbgmsgs"); 864 return (DCMD_ERR); 865 } 866 867 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { 868 mdb_warn("can't walk zfs_dbgmsgs"); 869 return (DCMD_ERR); 870 } 871 872 return (DCMD_OK); 873 } 874 875 /*ARGSUSED*/ 876 static int 877 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 878 { 879 kstat_named_t *stats; 880 GElf_Sym sym; 881 int nstats, i; 882 uint_t opt_a = FALSE; 883 uint_t opt_b = FALSE; 884 uint_t shift = 0; 885 const char *suffix; 886 887 static const char *bytestats[] = { 888 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 889 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 890 NULL 891 }; 892 893 static const char *extras[] = { 894 "arc_no_grow", "arc_tempreserve", 895 NULL 896 }; 897 898 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) { 899 mdb_warn("failed to find 'arc_stats'"); 900 return (DCMD_ERR); 901 } 902 903 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 904 905 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 906 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 907 return (DCMD_ERR); 908 } 909 910 nstats = sym.st_size / sizeof (kstat_named_t); 911 912 /* NB: -a / opt_a are ignored for backwards compatability */ 913 if (mdb_getopts(argc, argv, 914 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 915 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 916 'k', MDB_OPT_SETBITS, 10, &shift, 917 'm', MDB_OPT_SETBITS, 20, &shift, 918 'g', MDB_OPT_SETBITS, 30, &shift, 919 NULL) != argc) 920 return (DCMD_USAGE); 921 922 if (!opt_b && !shift) 923 shift = 20; 924 925 switch (shift) { 926 case 0: 927 suffix = "B"; 928 break; 929 case 10: 930 suffix = "KB"; 931 break; 932 case 20: 933 suffix = "MB"; 934 break; 935 case 30: 936 suffix = "GB"; 937 break; 938 default: 939 suffix = "XX"; 940 } 941 942 for (i = 0; i < nstats; i++) { 943 int j; 944 boolean_t bytes = B_FALSE; 945 946 for (j = 0; bytestats[j]; j++) { 947 if (strcmp(stats[i].name, bytestats[j]) == 0) { 948 bytes = B_TRUE; 949 break; 950 } 951 } 952 953 if (bytes) { 954 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 955 stats[i].value.ui64 >> shift, suffix); 956 } else { 957 mdb_printf("%-25s = %9llu\n", stats[i].name, 958 stats[i].value.ui64); 959 } 960 } 961 962 for (i = 0; extras[i]; i++) { 963 uint64_t buf; 964 965 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) { 966 mdb_warn("failed to find '%s'", extras[i]); 967 return (DCMD_ERR); 968 } 969 970 if (sym.st_size != sizeof (uint64_t) && 971 sym.st_size != sizeof (uint32_t)) { 972 mdb_warn("expected scalar for variable '%s'\n", 973 extras[i]); 974 return (DCMD_ERR); 975 } 976 977 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 978 mdb_warn("couldn't read '%s'", extras[i]); 979 return (DCMD_ERR); 980 } 981 982 mdb_printf("%-25s = ", extras[i]); 983 984 /* NB: all the 64-bit extras happen to be byte counts */ 985 if (sym.st_size == sizeof (uint64_t)) 986 mdb_printf("%9llu %s\n", buf >> shift, suffix); 987 988 if (sym.st_size == sizeof (uint32_t)) 989 mdb_printf("%9d\n", *((uint32_t *)&buf)); 990 } 991 return (DCMD_OK); 992 } 993 994 typedef struct mdb_spa_print { 995 pool_state_t spa_state; 996 char spa_name[MAXNAMELEN]; 997 } mdb_spa_print_t; 998 999 /* 1000 * ::spa 1001 * 1002 * -c Print configuration information as well 1003 * -v Print vdev state 1004 * -e Print vdev error stats 1005 * 1006 * Print a summarized spa_t. When given no arguments, prints out a table of all 1007 * active pools on the system. 1008 */ 1009 /* ARGSUSED */ 1010 static int 1011 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1012 { 1013 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1014 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1015 const char *state; 1016 int config = FALSE; 1017 int vdevs = FALSE; 1018 int errors = FALSE; 1019 1020 if (mdb_getopts(argc, argv, 1021 'c', MDB_OPT_SETBITS, TRUE, &config, 1022 'v', MDB_OPT_SETBITS, TRUE, &vdevs, 1023 'e', MDB_OPT_SETBITS, TRUE, &errors, 1024 NULL) != argc) 1025 return (DCMD_USAGE); 1026 1027 if (!(flags & DCMD_ADDRSPEC)) { 1028 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1029 mdb_warn("can't walk spa"); 1030 return (DCMD_ERR); 1031 } 1032 1033 return (DCMD_OK); 1034 } 1035 1036 if (flags & DCMD_PIPE_OUT) { 1037 mdb_printf("%#lr\n", addr); 1038 return (DCMD_OK); 1039 } 1040 1041 if (DCMD_HDRSPEC(flags)) 1042 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1043 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1044 1045 mdb_spa_print_t spa; 1046 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1) 1047 return (DCMD_ERR); 1048 1049 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1050 state = "UNKNOWN"; 1051 else 1052 state = statetab[spa.spa_state]; 1053 1054 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1055 1056 if (config) { 1057 mdb_printf("\n"); 1058 mdb_inc_indent(4); 1059 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1060 NULL) != DCMD_OK) 1061 return (DCMD_ERR); 1062 mdb_dec_indent(4); 1063 } 1064 1065 if (vdevs || errors) { 1066 mdb_arg_t v; 1067 1068 v.a_type = MDB_TYPE_STRING; 1069 v.a_un.a_str = "-e"; 1070 1071 mdb_printf("\n"); 1072 mdb_inc_indent(4); 1073 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0, 1074 &v) != DCMD_OK) 1075 return (DCMD_ERR); 1076 mdb_dec_indent(4); 1077 } 1078 1079 return (DCMD_OK); 1080 } 1081 1082 typedef struct mdb_spa_config_spa { 1083 uintptr_t spa_config; 1084 } mdb_spa_config_spa_t; 1085 1086 /* 1087 * ::spa_config 1088 * 1089 * Given a spa_t, print the configuration information stored in spa_config. 1090 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1091 * We simply read the value of spa_config and pass off to ::nvlist. 1092 */ 1093 /* ARGSUSED */ 1094 static int 1095 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1096 { 1097 mdb_spa_config_spa_t spa; 1098 1099 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1100 return (DCMD_USAGE); 1101 1102 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", 1103 addr, 0) == -1) 1104 return (DCMD_ERR); 1105 1106 if (spa.spa_config == 0) { 1107 mdb_printf("(none)\n"); 1108 return (DCMD_OK); 1109 } 1110 1111 return (mdb_call_dcmd("nvlist", spa.spa_config, flags, 1112 0, NULL)); 1113 } 1114 1115 /* 1116 * ::vdev 1117 * 1118 * Print out a summarized vdev_t, in the following form: 1119 * 1120 * ADDR STATE AUX DESC 1121 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1122 * 1123 * If '-r' is specified, recursively visit all children. 1124 * 1125 * With '-e', the statistics associated with the vdev are printed as well. 1126 */ 1127 static int 1128 do_print_vdev(uintptr_t addr, int flags, int depth, int stats, 1129 int recursive) 1130 { 1131 vdev_t vdev; 1132 char desc[MAXNAMELEN]; 1133 int c, children; 1134 uintptr_t *child; 1135 const char *state, *aux; 1136 1137 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1138 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1139 return (DCMD_ERR); 1140 } 1141 1142 if (flags & DCMD_PIPE_OUT) { 1143 mdb_printf("%#lr", addr); 1144 } else { 1145 if (vdev.vdev_path != NULL) { 1146 if (mdb_readstr(desc, sizeof (desc), 1147 (uintptr_t)vdev.vdev_path) == -1) { 1148 mdb_warn("failed to read vdev_path at %p\n", 1149 vdev.vdev_path); 1150 return (DCMD_ERR); 1151 } 1152 } else if (vdev.vdev_ops != NULL) { 1153 vdev_ops_t ops; 1154 if (mdb_vread(&ops, sizeof (ops), 1155 (uintptr_t)vdev.vdev_ops) == -1) { 1156 mdb_warn("failed to read vdev_ops at %p\n", 1157 vdev.vdev_ops); 1158 return (DCMD_ERR); 1159 } 1160 (void) strcpy(desc, ops.vdev_op_type); 1161 } else { 1162 (void) strcpy(desc, "<unknown>"); 1163 } 1164 1165 if (depth == 0 && DCMD_HDRSPEC(flags)) 1166 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1167 "ADDR", "STATE", "AUX", 1168 sizeof (uintptr_t) == 4 ? 43 : 35, 1169 "DESCRIPTION"); 1170 1171 mdb_printf("%0?p ", addr); 1172 1173 switch (vdev.vdev_state) { 1174 case VDEV_STATE_CLOSED: 1175 state = "CLOSED"; 1176 break; 1177 case VDEV_STATE_OFFLINE: 1178 state = "OFFLINE"; 1179 break; 1180 case VDEV_STATE_CANT_OPEN: 1181 state = "CANT_OPEN"; 1182 break; 1183 case VDEV_STATE_DEGRADED: 1184 state = "DEGRADED"; 1185 break; 1186 case VDEV_STATE_HEALTHY: 1187 state = "HEALTHY"; 1188 break; 1189 case VDEV_STATE_REMOVED: 1190 state = "REMOVED"; 1191 break; 1192 case VDEV_STATE_FAULTED: 1193 state = "FAULTED"; 1194 break; 1195 default: 1196 state = "UNKNOWN"; 1197 break; 1198 } 1199 1200 switch (vdev.vdev_stat.vs_aux) { 1201 case VDEV_AUX_NONE: 1202 aux = "-"; 1203 break; 1204 case VDEV_AUX_OPEN_FAILED: 1205 aux = "OPEN_FAILED"; 1206 break; 1207 case VDEV_AUX_CORRUPT_DATA: 1208 aux = "CORRUPT_DATA"; 1209 break; 1210 case VDEV_AUX_NO_REPLICAS: 1211 aux = "NO_REPLICAS"; 1212 break; 1213 case VDEV_AUX_BAD_GUID_SUM: 1214 aux = "BAD_GUID_SUM"; 1215 break; 1216 case VDEV_AUX_TOO_SMALL: 1217 aux = "TOO_SMALL"; 1218 break; 1219 case VDEV_AUX_BAD_LABEL: 1220 aux = "BAD_LABEL"; 1221 break; 1222 case VDEV_AUX_VERSION_NEWER: 1223 aux = "VERS_NEWER"; 1224 break; 1225 case VDEV_AUX_VERSION_OLDER: 1226 aux = "VERS_OLDER"; 1227 break; 1228 case VDEV_AUX_UNSUP_FEAT: 1229 aux = "UNSUP_FEAT"; 1230 break; 1231 case VDEV_AUX_SPARED: 1232 aux = "SPARED"; 1233 break; 1234 case VDEV_AUX_ERR_EXCEEDED: 1235 aux = "ERR_EXCEEDED"; 1236 break; 1237 case VDEV_AUX_IO_FAILURE: 1238 aux = "IO_FAILURE"; 1239 break; 1240 case VDEV_AUX_BAD_LOG: 1241 aux = "BAD_LOG"; 1242 break; 1243 case VDEV_AUX_EXTERNAL: 1244 aux = "EXTERNAL"; 1245 break; 1246 case VDEV_AUX_SPLIT_POOL: 1247 aux = "SPLIT_POOL"; 1248 break; 1249 default: 1250 aux = "UNKNOWN"; 1251 break; 1252 } 1253 1254 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1255 1256 if (stats) { 1257 vdev_stat_t *vs = &vdev.vdev_stat; 1258 int i; 1259 1260 mdb_inc_indent(4); 1261 mdb_printf("\n"); 1262 mdb_printf("%<u> %12s %12s %12s %12s " 1263 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1264 "IOCTL"); 1265 mdb_printf("OPS "); 1266 for (i = 1; i < ZIO_TYPES; i++) 1267 mdb_printf("%11#llx%s", vs->vs_ops[i], 1268 i == ZIO_TYPES - 1 ? "" : " "); 1269 mdb_printf("\n"); 1270 mdb_printf("BYTES "); 1271 for (i = 1; i < ZIO_TYPES; i++) 1272 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1273 i == ZIO_TYPES - 1 ? "" : " "); 1274 1275 1276 mdb_printf("\n"); 1277 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1278 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1279 mdb_printf("ECKSUM %10#llx\n", 1280 vs->vs_checksum_errors); 1281 mdb_dec_indent(4); 1282 } 1283 1284 if (stats) 1285 mdb_printf("\n"); 1286 } 1287 1288 children = vdev.vdev_children; 1289 1290 if (children == 0 || !recursive) 1291 return (DCMD_OK); 1292 1293 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1294 if (mdb_vread(child, children * sizeof (void *), 1295 (uintptr_t)vdev.vdev_child) == -1) { 1296 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1297 return (DCMD_ERR); 1298 } 1299 1300 for (c = 0; c < children; c++) { 1301 if (do_print_vdev(child[c], flags, depth + 2, stats, 1302 recursive)) 1303 return (DCMD_ERR); 1304 } 1305 1306 return (DCMD_OK); 1307 } 1308 1309 static int 1310 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1311 { 1312 int recursive = FALSE; 1313 int stats = FALSE; 1314 uint64_t depth = 0; 1315 1316 if (mdb_getopts(argc, argv, 1317 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1318 'e', MDB_OPT_SETBITS, TRUE, &stats, 1319 'd', MDB_OPT_UINT64, &depth, 1320 NULL) != argc) 1321 return (DCMD_USAGE); 1322 1323 if (!(flags & DCMD_ADDRSPEC)) { 1324 mdb_warn("no vdev_t address given\n"); 1325 return (DCMD_ERR); 1326 } 1327 1328 return (do_print_vdev(addr, flags, (int)depth, stats, recursive)); 1329 } 1330 1331 typedef struct metaslab_walk_data { 1332 uint64_t mw_numvdevs; 1333 uintptr_t *mw_vdevs; 1334 int mw_curvdev; 1335 uint64_t mw_nummss; 1336 uintptr_t *mw_mss; 1337 int mw_curms; 1338 } metaslab_walk_data_t; 1339 1340 static int 1341 metaslab_walk_step(mdb_walk_state_t *wsp) 1342 { 1343 metaslab_walk_data_t *mw = wsp->walk_data; 1344 metaslab_t ms; 1345 uintptr_t msp; 1346 1347 if (mw->mw_curvdev >= mw->mw_numvdevs) 1348 return (WALK_DONE); 1349 1350 if (mw->mw_mss == NULL) { 1351 uintptr_t mssp; 1352 uintptr_t vdevp; 1353 1354 ASSERT(mw->mw_curms == 0); 1355 ASSERT(mw->mw_nummss == 0); 1356 1357 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1358 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || 1359 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { 1360 return (WALK_ERR); 1361 } 1362 1363 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1364 UM_SLEEP | UM_GC); 1365 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1366 mssp) == -1) { 1367 mdb_warn("failed to read vdev_ms at %p", mssp); 1368 return (WALK_ERR); 1369 } 1370 } 1371 1372 if (mw->mw_curms >= mw->mw_nummss) { 1373 mw->mw_mss = NULL; 1374 mw->mw_curms = 0; 1375 mw->mw_nummss = 0; 1376 mw->mw_curvdev++; 1377 return (WALK_NEXT); 1378 } 1379 1380 msp = mw->mw_mss[mw->mw_curms]; 1381 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1382 mdb_warn("failed to read metaslab_t at %p", msp); 1383 return (WALK_ERR); 1384 } 1385 1386 mw->mw_curms++; 1387 1388 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1389 } 1390 1391 /* ARGSUSED */ 1392 static int 1393 metaslab_walk_init(mdb_walk_state_t *wsp) 1394 { 1395 metaslab_walk_data_t *mw; 1396 uintptr_t root_vdevp; 1397 uintptr_t childp; 1398 1399 if (wsp->walk_addr == NULL) { 1400 mdb_warn("must supply address of spa_t\n"); 1401 return (WALK_ERR); 1402 } 1403 1404 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1405 1406 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || 1407 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || 1408 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { 1409 return (DCMD_ERR); 1410 } 1411 1412 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1413 UM_SLEEP | UM_GC); 1414 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1415 childp) == -1) { 1416 mdb_warn("failed to read root vdev children at %p", childp); 1417 return (DCMD_ERR); 1418 } 1419 1420 wsp->walk_data = mw; 1421 1422 return (WALK_NEXT); 1423 } 1424 1425 typedef struct mdb_spa { 1426 uintptr_t spa_dsl_pool; 1427 uintptr_t spa_root_vdev; 1428 } mdb_spa_t; 1429 1430 typedef struct mdb_dsl_dir { 1431 uintptr_t dd_phys; 1432 int64_t dd_space_towrite[TXG_SIZE]; 1433 } mdb_dsl_dir_t; 1434 1435 typedef struct mdb_dsl_dir_phys { 1436 uint64_t dd_used_bytes; 1437 uint64_t dd_compressed_bytes; 1438 uint64_t dd_uncompressed_bytes; 1439 } mdb_dsl_dir_phys_t; 1440 1441 typedef struct mdb_vdev { 1442 uintptr_t vdev_parent; 1443 uintptr_t vdev_ms; 1444 uint64_t vdev_ms_count; 1445 vdev_stat_t vdev_stat; 1446 } mdb_vdev_t; 1447 1448 typedef struct mdb_metaslab { 1449 space_map_t ms_allocmap[TXG_SIZE]; 1450 space_map_t ms_freemap[TXG_SIZE]; 1451 space_map_t ms_map; 1452 space_map_obj_t ms_smo; 1453 space_map_obj_t ms_smo_syncing; 1454 } mdb_metaslab_t; 1455 1456 typedef struct space_data { 1457 uint64_t ms_allocmap[TXG_SIZE]; 1458 uint64_t ms_freemap[TXG_SIZE]; 1459 uint64_t ms_map; 1460 uint64_t avail; 1461 uint64_t nowavail; 1462 } space_data_t; 1463 1464 /* ARGSUSED */ 1465 static int 1466 space_cb(uintptr_t addr, const void *unknown, void *arg) 1467 { 1468 space_data_t *sd = arg; 1469 mdb_metaslab_t ms; 1470 1471 if (GETMEMB(addr, "metaslab", ms_allocmap, ms.ms_allocmap) || 1472 GETMEMB(addr, "metaslab", ms_freemap, ms.ms_freemap) || 1473 GETMEMB(addr, "metaslab", ms_map, ms.ms_map) || 1474 GETMEMB(addr, "metaslab", ms_smo, ms.ms_smo) || 1475 GETMEMB(addr, "metaslab", ms_smo_syncing, ms.ms_smo_syncing)) { 1476 return (WALK_ERR); 1477 } 1478 1479 sd->ms_allocmap[0] += ms.ms_allocmap[0].sm_space; 1480 sd->ms_allocmap[1] += ms.ms_allocmap[1].sm_space; 1481 sd->ms_allocmap[2] += ms.ms_allocmap[2].sm_space; 1482 sd->ms_allocmap[3] += ms.ms_allocmap[3].sm_space; 1483 sd->ms_freemap[0] += ms.ms_freemap[0].sm_space; 1484 sd->ms_freemap[1] += ms.ms_freemap[1].sm_space; 1485 sd->ms_freemap[2] += ms.ms_freemap[2].sm_space; 1486 sd->ms_freemap[3] += ms.ms_freemap[3].sm_space; 1487 sd->ms_map += ms.ms_map.sm_space; 1488 sd->avail += ms.ms_map.sm_size - ms.ms_smo.smo_alloc; 1489 sd->nowavail += ms.ms_map.sm_size - ms.ms_smo_syncing.smo_alloc; 1490 1491 return (WALK_NEXT); 1492 } 1493 1494 /* 1495 * ::spa_space [-b] 1496 * 1497 * Given a spa_t, print out it's on-disk space usage and in-core 1498 * estimates of future usage. If -b is given, print space in bytes. 1499 * Otherwise print in megabytes. 1500 */ 1501 /* ARGSUSED */ 1502 static int 1503 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1504 { 1505 mdb_spa_t spa; 1506 uintptr_t dp_root_dir; 1507 mdb_dsl_dir_t dd; 1508 mdb_dsl_dir_phys_t dsp; 1509 uint64_t children; 1510 uintptr_t childaddr; 1511 space_data_t sd; 1512 int shift = 20; 1513 char *suffix = "M"; 1514 int bytes = B_FALSE; 1515 1516 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != 1517 argc) 1518 return (DCMD_USAGE); 1519 if (!(flags & DCMD_ADDRSPEC)) 1520 return (DCMD_USAGE); 1521 1522 if (bytes) { 1523 shift = 0; 1524 suffix = ""; 1525 } 1526 1527 if (GETMEMB(addr, "spa", spa_dsl_pool, spa.spa_dsl_pool) || 1528 GETMEMB(addr, "spa", spa_root_vdev, spa.spa_root_vdev) || 1529 GETMEMB(spa.spa_root_vdev, "vdev", vdev_children, children) || 1530 GETMEMB(spa.spa_root_vdev, "vdev", vdev_child, childaddr) || 1531 GETMEMB(spa.spa_dsl_pool, "dsl_pool", 1532 dp_root_dir, dp_root_dir) || 1533 GETMEMB(dp_root_dir, "dsl_dir", dd_phys, dd.dd_phys) || 1534 GETMEMB(dp_root_dir, "dsl_dir", 1535 dd_space_towrite, dd.dd_space_towrite) || 1536 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1537 dd_used_bytes, dsp.dd_used_bytes) || 1538 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1539 dd_compressed_bytes, dsp.dd_compressed_bytes) || 1540 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1541 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) { 1542 return (DCMD_ERR); 1543 } 1544 1545 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1546 dd.dd_space_towrite[0] >> shift, suffix, 1547 dd.dd_space_towrite[1] >> shift, suffix, 1548 dd.dd_space_towrite[2] >> shift, suffix, 1549 dd.dd_space_towrite[3] >> shift, suffix); 1550 1551 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1552 dsp.dd_used_bytes >> shift, suffix); 1553 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1554 dsp.dd_compressed_bytes >> shift, suffix); 1555 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1556 dsp.dd_uncompressed_bytes >> shift, suffix); 1557 1558 bzero(&sd, sizeof (sd)); 1559 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1560 mdb_warn("can't walk metaslabs"); 1561 return (DCMD_ERR); 1562 } 1563 1564 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1565 sd.ms_allocmap[0] >> shift, suffix, 1566 sd.ms_allocmap[1] >> shift, suffix, 1567 sd.ms_allocmap[2] >> shift, suffix, 1568 sd.ms_allocmap[3] >> shift, suffix); 1569 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1570 sd.ms_freemap[0] >> shift, suffix, 1571 sd.ms_freemap[1] >> shift, suffix, 1572 sd.ms_freemap[2] >> shift, suffix, 1573 sd.ms_freemap[3] >> shift, suffix); 1574 mdb_printf("ms_map = %llu%s\n", sd.ms_map >> shift, suffix); 1575 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1576 mdb_printf("current syncing avail = %llu%s\n", 1577 sd.nowavail >> shift, suffix); 1578 1579 return (DCMD_OK); 1580 } 1581 1582 typedef struct mdb_spa_aux_vdev { 1583 int sav_count; 1584 uintptr_t sav_vdevs; 1585 } mdb_spa_aux_vdev_t; 1586 1587 typedef struct mdb_spa_vdevs { 1588 uintptr_t spa_root_vdev; 1589 mdb_spa_aux_vdev_t spa_l2cache; 1590 mdb_spa_aux_vdev_t spa_spares; 1591 } mdb_spa_vdevs_t; 1592 1593 static int 1594 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 1595 const char *name) 1596 { 1597 uintptr_t *aux; 1598 size_t len; 1599 int ret, i; 1600 1601 /* 1602 * Iterate over aux vdevs and print those out as well. This is a 1603 * little annoying because we don't have a root vdev to pass to ::vdev. 1604 * Instead, we print a single line and then call it for each child 1605 * vdev. 1606 */ 1607 if (sav->sav_count != 0) { 1608 v[1].a_type = MDB_TYPE_STRING; 1609 v[1].a_un.a_str = "-d"; 1610 v[2].a_type = MDB_TYPE_IMMEDIATE; 1611 v[2].a_un.a_val = 2; 1612 1613 len = sav->sav_count * sizeof (uintptr_t); 1614 aux = mdb_alloc(len, UM_SLEEP); 1615 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) { 1616 mdb_free(aux, len); 1617 mdb_warn("failed to read l2cache vdevs at %p", 1618 sav->sav_vdevs); 1619 return (DCMD_ERR); 1620 } 1621 1622 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 1623 1624 for (i = 0; i < sav->sav_count; i++) { 1625 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 1626 if (ret != DCMD_OK) { 1627 mdb_free(aux, len); 1628 return (ret); 1629 } 1630 } 1631 1632 mdb_free(aux, len); 1633 } 1634 1635 return (0); 1636 } 1637 1638 /* 1639 * ::spa_vdevs 1640 * 1641 * -e Include error stats 1642 * 1643 * Print out a summarized list of vdevs for the given spa_t. 1644 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 1645 * iterating over the cache devices. 1646 */ 1647 /* ARGSUSED */ 1648 static int 1649 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1650 { 1651 mdb_arg_t v[3]; 1652 int errors = FALSE; 1653 int ret; 1654 1655 if (mdb_getopts(argc, argv, 1656 'e', MDB_OPT_SETBITS, TRUE, &errors, 1657 NULL) != argc) 1658 return (DCMD_USAGE); 1659 1660 if (!(flags & DCMD_ADDRSPEC)) 1661 return (DCMD_USAGE); 1662 1663 mdb_spa_vdevs_t spa; 1664 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1) 1665 return (DCMD_ERR); 1666 1667 /* 1668 * Unitialized spa_t structures can have a NULL root vdev. 1669 */ 1670 if (spa.spa_root_vdev == NULL) { 1671 mdb_printf("no associated vdevs\n"); 1672 return (DCMD_OK); 1673 } 1674 1675 v[0].a_type = MDB_TYPE_STRING; 1676 v[0].a_un.a_str = errors ? "-re" : "-r"; 1677 1678 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1679 flags, 1, v); 1680 if (ret != DCMD_OK) 1681 return (ret); 1682 1683 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 1684 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 1685 return (DCMD_ERR); 1686 1687 return (DCMD_OK); 1688 } 1689 1690 /* 1691 * ::zio 1692 * 1693 * Print a summary of zio_t and all its children. This is intended to display a 1694 * zio tree, and hence we only pick the most important pieces of information for 1695 * the main summary. More detailed information can always be found by doing a 1696 * '::print zio' on the underlying zio_t. The columns we display are: 1697 * 1698 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED 1699 * 1700 * The 'address' column is indented by one space for each depth level as we 1701 * descend down the tree. 1702 */ 1703 1704 #define ZIO_MAXINDENT 7 1705 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 1706 #define ZIO_WALK_SELF 0 1707 #define ZIO_WALK_CHILD 1 1708 #define ZIO_WALK_PARENT 2 1709 1710 typedef struct zio_print_args { 1711 int zpa_current_depth; 1712 int zpa_min_depth; 1713 int zpa_max_depth; 1714 int zpa_type; 1715 uint_t zpa_flags; 1716 } zio_print_args_t; 1717 1718 typedef struct mdb_zio { 1719 enum zio_type io_type; 1720 enum zio_stage io_stage; 1721 uintptr_t io_waiter; 1722 uintptr_t io_spa; 1723 struct { 1724 struct { 1725 uintptr_t list_next; 1726 } list_head; 1727 } io_parent_list; 1728 int io_error; 1729 } mdb_zio_t; 1730 1731 typedef struct mdb_zio_timestamp { 1732 hrtime_t io_timestamp; 1733 } mdb_zio_timestamp_t; 1734 1735 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 1736 1737 static int 1738 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) 1739 { 1740 mdb_ctf_id_t type_enum, stage_enum; 1741 int indent = zpa->zpa_current_depth; 1742 const char *type, *stage; 1743 uintptr_t laddr; 1744 mdb_zio_t zio; 1745 mdb_zio_timestamp_t zio_timestamp = { 0 }; 1746 1747 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) 1748 return (WALK_ERR); 1749 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", 1750 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); 1751 1752 if (indent > ZIO_MAXINDENT) 1753 indent = ZIO_MAXINDENT; 1754 1755 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 1756 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 1757 mdb_warn("failed to lookup zio enums"); 1758 return (WALK_ERR); 1759 } 1760 1761 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) 1762 type += sizeof ("ZIO_TYPE_") - 1; 1763 else 1764 type = "?"; 1765 1766 if (zio.io_error == 0) { 1767 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); 1768 if (stage != NULL) 1769 stage += sizeof ("ZIO_STAGE_") - 1; 1770 else 1771 stage = "?"; 1772 } else { 1773 stage = "FAILED"; 1774 } 1775 1776 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 1777 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 1778 mdb_printf("%?p\n", addr); 1779 } else { 1780 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 1781 ZIO_MAXWIDTH - indent, addr, type, stage); 1782 if (zio.io_waiter != 0) 1783 mdb_printf("%-16lx ", zio.io_waiter); 1784 else 1785 mdb_printf("%-16s ", "-"); 1786 #ifdef _KERNEL 1787 if (zio_timestamp.io_timestamp != 0) { 1788 mdb_printf("%llums", (mdb_gethrtime() - 1789 zio_timestamp.io_timestamp) / 1790 1000000); 1791 } else { 1792 mdb_printf("%-12s ", "-"); 1793 } 1794 #else 1795 mdb_printf("%-12s ", "-"); 1796 #endif 1797 mdb_printf("\n"); 1798 } 1799 } 1800 1801 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 1802 return (WALK_NEXT); 1803 1804 if (zpa->zpa_type == ZIO_WALK_PARENT) 1805 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 1806 "io_parent_list"); 1807 else 1808 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 1809 "io_child_list"); 1810 1811 zpa->zpa_current_depth++; 1812 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 1813 mdb_warn("failed to walk zio_t children at %p\n", laddr); 1814 return (WALK_ERR); 1815 } 1816 zpa->zpa_current_depth--; 1817 1818 return (WALK_NEXT); 1819 } 1820 1821 /* ARGSUSED */ 1822 static int 1823 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 1824 { 1825 zio_link_t zl; 1826 uintptr_t ziop; 1827 zio_print_args_t *zpa = arg; 1828 1829 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 1830 mdb_warn("failed to read zio_link_t at %p", addr); 1831 return (WALK_ERR); 1832 } 1833 1834 if (zpa->zpa_type == ZIO_WALK_PARENT) 1835 ziop = (uintptr_t)zl.zl_parent; 1836 else 1837 ziop = (uintptr_t)zl.zl_child; 1838 1839 return (zio_print_cb(ziop, arg)); 1840 } 1841 1842 /* ARGSUSED */ 1843 static int 1844 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1845 { 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 (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 1868 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n", 1869 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", 1870 "TIME_ELAPSED"); 1871 } 1872 1873 if (zio_print_cb(addr, &zpa) != WALK_NEXT) 1874 return (DCMD_ERR); 1875 1876 return (DCMD_OK); 1877 } 1878 1879 /* 1880 * [addr]::zio_state 1881 * 1882 * Print a summary of all zio_t structures on the system, or for a particular 1883 * pool. This is equivalent to '::walk zio_root | ::zio'. 1884 */ 1885 /*ARGSUSED*/ 1886 static int 1887 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1888 { 1889 /* 1890 * MDB will remember the last address of the pipeline, so if we don't 1891 * zero this we'll end up trying to walk zio structures for a 1892 * non-existent spa_t. 1893 */ 1894 if (!(flags & DCMD_ADDRSPEC)) 1895 addr = 0; 1896 1897 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 1898 } 1899 1900 typedef struct txg_list_walk_data { 1901 uintptr_t lw_head[TXG_SIZE]; 1902 int lw_txgoff; 1903 int lw_maxoff; 1904 size_t lw_offset; 1905 void *lw_obj; 1906 } txg_list_walk_data_t; 1907 1908 static int 1909 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 1910 { 1911 txg_list_walk_data_t *lwd; 1912 txg_list_t list; 1913 int i; 1914 1915 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 1916 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 1917 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 1918 return (WALK_ERR); 1919 } 1920 1921 for (i = 0; i < TXG_SIZE; i++) 1922 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 1923 lwd->lw_offset = list.tl_offset; 1924 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 1925 UM_SLEEP | UM_GC); 1926 lwd->lw_txgoff = txg; 1927 lwd->lw_maxoff = maxoff; 1928 1929 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1930 wsp->walk_data = lwd; 1931 1932 return (WALK_NEXT); 1933 } 1934 1935 static int 1936 txg_list_walk_init(mdb_walk_state_t *wsp) 1937 { 1938 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 1939 } 1940 1941 static int 1942 txg_list0_walk_init(mdb_walk_state_t *wsp) 1943 { 1944 return (txg_list_walk_init_common(wsp, 0, 0)); 1945 } 1946 1947 static int 1948 txg_list1_walk_init(mdb_walk_state_t *wsp) 1949 { 1950 return (txg_list_walk_init_common(wsp, 1, 1)); 1951 } 1952 1953 static int 1954 txg_list2_walk_init(mdb_walk_state_t *wsp) 1955 { 1956 return (txg_list_walk_init_common(wsp, 2, 2)); 1957 } 1958 1959 static int 1960 txg_list3_walk_init(mdb_walk_state_t *wsp) 1961 { 1962 return (txg_list_walk_init_common(wsp, 3, 3)); 1963 } 1964 1965 static int 1966 txg_list_walk_step(mdb_walk_state_t *wsp) 1967 { 1968 txg_list_walk_data_t *lwd = wsp->walk_data; 1969 uintptr_t addr; 1970 txg_node_t *node; 1971 int status; 1972 1973 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 1974 lwd->lw_txgoff++; 1975 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1976 } 1977 1978 if (wsp->walk_addr == NULL) 1979 return (WALK_DONE); 1980 1981 addr = wsp->walk_addr - lwd->lw_offset; 1982 1983 if (mdb_vread(lwd->lw_obj, 1984 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 1985 mdb_warn("failed to read list element at %#lx", addr); 1986 return (WALK_ERR); 1987 } 1988 1989 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 1990 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 1991 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 1992 1993 return (status); 1994 } 1995 1996 /* 1997 * ::walk spa 1998 * 1999 * Walk all named spa_t structures in the namespace. This is nothing more than 2000 * a layered avl walk. 2001 */ 2002 static int 2003 spa_walk_init(mdb_walk_state_t *wsp) 2004 { 2005 GElf_Sym sym; 2006 2007 if (wsp->walk_addr != NULL) { 2008 mdb_warn("spa walk only supports global walks\n"); 2009 return (WALK_ERR); 2010 } 2011 2012 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 2013 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 2014 return (WALK_ERR); 2015 } 2016 2017 wsp->walk_addr = (uintptr_t)sym.st_value; 2018 2019 if (mdb_layered_walk("avl", wsp) == -1) { 2020 mdb_warn("failed to walk 'avl'\n"); 2021 return (WALK_ERR); 2022 } 2023 2024 return (WALK_NEXT); 2025 } 2026 2027 static int 2028 spa_walk_step(mdb_walk_state_t *wsp) 2029 { 2030 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata)); 2031 } 2032 2033 /* 2034 * [addr]::walk zio 2035 * 2036 * Walk all active zio_t structures on the system. This is simply a layered 2037 * walk on top of ::walk zio_cache, with the optional ability to limit the 2038 * structures to a particular pool. 2039 */ 2040 static int 2041 zio_walk_init(mdb_walk_state_t *wsp) 2042 { 2043 wsp->walk_data = &wsp->walk_addr; 2044 2045 if (mdb_layered_walk("zio_cache", wsp) == -1) { 2046 mdb_warn("failed to walk 'zio_cache'\n"); 2047 return (WALK_ERR); 2048 } 2049 2050 return (WALK_NEXT); 2051 } 2052 2053 static int 2054 zio_walk_step(mdb_walk_state_t *wsp) 2055 { 2056 mdb_zio_t zio; 2057 uintptr_t *spap = wsp->walk_data; 2058 2059 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2060 wsp->walk_addr, 0) == -1) 2061 return (WALK_ERR); 2062 2063 if (*spap != 0 && *spap != zio.io_spa) 2064 return (WALK_NEXT); 2065 2066 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2067 } 2068 2069 /* 2070 * [addr]::walk zio_root 2071 * 2072 * Walk only root zio_t structures, optionally for a particular spa_t. 2073 */ 2074 static int 2075 zio_walk_root_step(mdb_walk_state_t *wsp) 2076 { 2077 mdb_zio_t zio; 2078 uintptr_t *spap = wsp->walk_data; 2079 2080 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2081 wsp->walk_addr, 0) == -1) 2082 return (WALK_ERR); 2083 2084 if (*spap != 0 && *spap != zio.io_spa) 2085 return (WALK_NEXT); 2086 2087 /* If the parent list is not empty, ignore */ 2088 if (zio.io_parent_list.list_head.list_next != 2089 wsp->walk_addr + 2090 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + 2091 mdb_ctf_offsetof_by_name("struct list", "list_head")) 2092 return (WALK_NEXT); 2093 2094 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2095 } 2096 2097 #define NICENUM_BUFLEN 6 2098 2099 static int 2100 snprintfrac(char *buf, int len, 2101 uint64_t numerator, uint64_t denom, int frac_digits) 2102 { 2103 int mul = 1; 2104 int whole, frac, i; 2105 2106 for (i = frac_digits; i; i--) 2107 mul *= 10; 2108 whole = numerator / denom; 2109 frac = mul * numerator / denom - mul * whole; 2110 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); 2111 } 2112 2113 static void 2114 mdb_nicenum(uint64_t num, char *buf) 2115 { 2116 uint64_t n = num; 2117 int index = 0; 2118 char *u; 2119 2120 while (n >= 1024) { 2121 n = (n + (1024 / 2)) / 1024; /* Round up or down */ 2122 index++; 2123 } 2124 2125 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; 2126 2127 if (index == 0) { 2128 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", 2129 (u_longlong_t)n); 2130 } else if (n < 10 && (num & (num - 1)) != 0) { 2131 (void) snprintfrac(buf, NICENUM_BUFLEN, 2132 num, 1ULL << 10 * index, 2); 2133 strcat(buf, u); 2134 } else if (n < 100 && (num & (num - 1)) != 0) { 2135 (void) snprintfrac(buf, NICENUM_BUFLEN, 2136 num, 1ULL << 10 * index, 1); 2137 strcat(buf, u); 2138 } else { 2139 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", 2140 (u_longlong_t)n, u); 2141 } 2142 } 2143 2144 /* 2145 * ::zfs_blkstats 2146 * 2147 * -v print verbose per-level information 2148 * 2149 */ 2150 static int 2151 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2152 { 2153 boolean_t verbose = B_FALSE; 2154 zfs_all_blkstats_t stats; 2155 dmu_object_type_t t; 2156 zfs_blkstat_t *tzb; 2157 uint64_t ditto; 2158 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; 2159 /* +10 in case it grew */ 2160 2161 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { 2162 mdb_warn("failed to read 'dmu_ot'"); 2163 return (DCMD_ERR); 2164 } 2165 2166 if (mdb_getopts(argc, argv, 2167 'v', MDB_OPT_SETBITS, TRUE, &verbose, 2168 NULL) != argc) 2169 return (DCMD_USAGE); 2170 2171 if (!(flags & DCMD_ADDRSPEC)) 2172 return (DCMD_USAGE); 2173 2174 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || 2175 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || 2176 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 2177 mdb_warn("failed to read data at %p;", addr); 2178 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 2179 return (DCMD_ERR); 2180 } 2181 2182 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 2183 if (tzb->zb_gangs != 0) { 2184 mdb_printf("Ganged blocks: %llu\n", 2185 (longlong_t)tzb->zb_gangs); 2186 } 2187 2188 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 2189 tzb->zb_ditto_3_of_3_samevdev; 2190 if (ditto != 0) { 2191 mdb_printf("Dittoed blocks on same vdev: %llu\n", 2192 (longlong_t)ditto); 2193 } 2194 2195 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 2196 "\t avg\t comp\t%%Total\tType\n"); 2197 2198 for (t = 0; t <= DMU_OT_TOTAL; t++) { 2199 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; 2200 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; 2201 char avg[NICENUM_BUFLEN]; 2202 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; 2203 char typename[64]; 2204 int l; 2205 2206 2207 if (t == DMU_OT_DEFERRED) 2208 strcpy(typename, "deferred free"); 2209 else if (t == DMU_OT_OTHER) 2210 strcpy(typename, "other"); 2211 else if (t == DMU_OT_TOTAL) 2212 strcpy(typename, "Total"); 2213 else if (mdb_readstr(typename, sizeof (typename), 2214 (uintptr_t)dmu_ot[t].ot_name) == -1) { 2215 mdb_warn("failed to read type name"); 2216 return (DCMD_ERR); 2217 } 2218 2219 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 2220 continue; 2221 2222 for (l = -1; l < DN_MAX_LEVELS; l++) { 2223 int level = (l == -1 ? DN_MAX_LEVELS : l); 2224 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 2225 2226 if (zb->zb_asize == 0) 2227 continue; 2228 2229 /* 2230 * Don't print each level unless requested. 2231 */ 2232 if (!verbose && level != DN_MAX_LEVELS) 2233 continue; 2234 2235 /* 2236 * If all the space is level 0, don't print the 2237 * level 0 separately. 2238 */ 2239 if (level == 0 && zb->zb_asize == 2240 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 2241 continue; 2242 2243 mdb_nicenum(zb->zb_count, csize); 2244 mdb_nicenum(zb->zb_lsize, lsize); 2245 mdb_nicenum(zb->zb_psize, psize); 2246 mdb_nicenum(zb->zb_asize, asize); 2247 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 2248 (void) snprintfrac(comp, NICENUM_BUFLEN, 2249 zb->zb_lsize, zb->zb_psize, 2); 2250 (void) snprintfrac(pct, NICENUM_BUFLEN, 2251 100 * zb->zb_asize, tzb->zb_asize, 2); 2252 2253 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 2254 "\t%5s\t%6s\t", 2255 csize, lsize, psize, asize, avg, comp, pct); 2256 2257 if (level == DN_MAX_LEVELS) 2258 mdb_printf("%s\n", typename); 2259 else 2260 mdb_printf(" L%d %s\n", 2261 level, typename); 2262 } 2263 } 2264 2265 return (DCMD_OK); 2266 } 2267 2268 typedef struct mdb_reference { 2269 uintptr_t ref_holder; 2270 uintptr_t ref_removed; 2271 uint64_t ref_number; 2272 } mdb_reference_t; 2273 2274 /* ARGSUSED */ 2275 static int 2276 reference_cb(uintptr_t addr, const void *ignored, void *arg) 2277 { 2278 mdb_reference_t ref; 2279 boolean_t holder_is_str = B_FALSE; 2280 char holder_str[128]; 2281 boolean_t removed = (boolean_t)arg; 2282 2283 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr, 2284 0) == -1) 2285 return (DCMD_ERR); 2286 2287 if (mdb_readstr(holder_str, sizeof (holder_str), 2288 ref.ref_holder) != -1) 2289 holder_is_str = strisprint(holder_str); 2290 2291 if (removed) 2292 mdb_printf("removed "); 2293 mdb_printf("reference "); 2294 if (ref.ref_number != 1) 2295 mdb_printf("with count=%llu ", ref.ref_number); 2296 mdb_printf("with tag %lx", ref.ref_holder); 2297 if (holder_is_str) 2298 mdb_printf(" \"%s\"", holder_str); 2299 mdb_printf(", held at:\n"); 2300 2301 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 2302 2303 if (removed) { 2304 mdb_printf("removed at:\n"); 2305 (void) mdb_call_dcmd("whatis", ref.ref_removed, 2306 DCMD_ADDRSPEC, 0, NULL); 2307 } 2308 2309 mdb_printf("\n"); 2310 2311 return (WALK_NEXT); 2312 } 2313 2314 typedef struct mdb_refcount { 2315 uint64_t rc_count; 2316 } mdb_refcount_t; 2317 2318 typedef struct mdb_refcount_removed { 2319 uint64_t rc_removed_count; 2320 } mdb_refcount_removed_t; 2321 2322 typedef struct mdb_refcount_tracked { 2323 boolean_t rc_tracked; 2324 } mdb_refcount_tracked_t; 2325 2326 /* ARGSUSED */ 2327 static int 2328 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2329 { 2330 mdb_refcount_t rc; 2331 mdb_refcount_removed_t rcr; 2332 mdb_refcount_tracked_t rct; 2333 int off; 2334 boolean_t released = B_FALSE; 2335 2336 if (!(flags & DCMD_ADDRSPEC)) 2337 return (DCMD_USAGE); 2338 2339 if (mdb_getopts(argc, argv, 2340 'r', MDB_OPT_SETBITS, B_TRUE, &released, 2341 NULL) != argc) 2342 return (DCMD_USAGE); 2343 2344 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr, 2345 0) == -1) 2346 return (DCMD_ERR); 2347 2348 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr, 2349 MDB_CTF_VREAD_QUIET) == -1) { 2350 mdb_printf("refcount_t at %p has %llu holds (untracked)\n", 2351 addr, (longlong_t)rc.rc_count); 2352 return (DCMD_OK); 2353 } 2354 2355 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr, 2356 MDB_CTF_VREAD_QUIET) == -1) { 2357 /* If this is an old target, it might be tracked. */ 2358 rct.rc_tracked = B_TRUE; 2359 } 2360 2361 mdb_printf("refcount_t at %p has %llu current holds, " 2362 "%llu recently released holds\n", 2363 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count); 2364 2365 if (rct.rc_tracked && rc.rc_count > 0) 2366 mdb_printf("current holds:\n"); 2367 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list"); 2368 if (off == -1) 2369 return (DCMD_ERR); 2370 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 2371 2372 if (released && rcr.rc_removed_count > 0) { 2373 mdb_printf("released holds:\n"); 2374 2375 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed"); 2376 if (off == -1) 2377 return (DCMD_ERR); 2378 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 2379 } 2380 2381 return (DCMD_OK); 2382 } 2383 2384 /* ARGSUSED */ 2385 static int 2386 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2387 { 2388 sa_attr_table_t *table; 2389 sa_os_t sa_os; 2390 char *name; 2391 int i; 2392 2393 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 2394 mdb_warn("failed to read sa_os at %p", addr); 2395 return (DCMD_ERR); 2396 } 2397 2398 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2399 UM_SLEEP | UM_GC); 2400 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 2401 2402 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2403 (uintptr_t)sa_os.sa_attr_table) == -1) { 2404 mdb_warn("failed to read sa_os at %p", addr); 2405 return (DCMD_ERR); 2406 } 2407 2408 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 2409 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 2410 for (i = 0; i != sa_os.sa_num_attrs; i++) { 2411 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 2412 mdb_printf("%5x %8x %8x %8x %-s\n", 2413 (int)table[i].sa_attr, (int)table[i].sa_registered, 2414 (int)table[i].sa_length, table[i].sa_byteswap, name); 2415 } 2416 2417 return (DCMD_OK); 2418 } 2419 2420 static int 2421 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 2422 { 2423 uintptr_t idx_table; 2424 2425 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { 2426 mdb_printf("can't find offset table in sa_idx_tab\n"); 2427 return (-1); 2428 } 2429 2430 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 2431 UM_SLEEP | UM_GC); 2432 2433 if (mdb_vread(*off_tab, 2434 attr_count * sizeof (uint32_t), idx_table) == -1) { 2435 mdb_warn("failed to attribute offset table %p", idx_table); 2436 return (-1); 2437 } 2438 2439 return (DCMD_OK); 2440 } 2441 2442 /*ARGSUSED*/ 2443 static int 2444 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2445 { 2446 uint32_t *offset_tab; 2447 int attr_count; 2448 uint64_t attr_id; 2449 uintptr_t attr_addr; 2450 uintptr_t bonus_tab, spill_tab; 2451 uintptr_t db_bonus, db_spill; 2452 uintptr_t os, os_sa; 2453 uintptr_t db_data; 2454 2455 if (argc != 1) 2456 return (DCMD_USAGE); 2457 2458 if (argv[0].a_type == MDB_TYPE_STRING) 2459 attr_id = mdb_strtoull(argv[0].a_un.a_str); 2460 else 2461 return (DCMD_USAGE); 2462 2463 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || 2464 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || 2465 GETMEMB(addr, "sa_handle", sa_os, os) || 2466 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || 2467 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { 2468 mdb_printf("Can't find necessary information in sa_handle " 2469 "in sa_handle\n"); 2470 return (DCMD_ERR); 2471 } 2472 2473 if (GETMEMB(os, "objset", os_sa, os_sa)) { 2474 mdb_printf("Can't find os_sa in objset\n"); 2475 return (DCMD_ERR); 2476 } 2477 2478 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { 2479 mdb_printf("Can't find sa_num_attrs\n"); 2480 return (DCMD_ERR); 2481 } 2482 2483 if (attr_id > attr_count) { 2484 mdb_printf("attribute id number is out of range\n"); 2485 return (DCMD_ERR); 2486 } 2487 2488 if (bonus_tab) { 2489 if (sa_get_off_table(bonus_tab, &offset_tab, 2490 attr_count) == -1) { 2491 return (DCMD_ERR); 2492 } 2493 2494 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { 2495 mdb_printf("can't find db_data in bonus dbuf\n"); 2496 return (DCMD_ERR); 2497 } 2498 } 2499 2500 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 2501 spill_tab == NULL) { 2502 mdb_printf("Attribute does not exist\n"); 2503 return (DCMD_ERR); 2504 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 2505 if (sa_get_off_table(spill_tab, &offset_tab, 2506 attr_count) == -1) { 2507 return (DCMD_ERR); 2508 } 2509 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { 2510 mdb_printf("can't find db_data in spill dbuf\n"); 2511 return (DCMD_ERR); 2512 } 2513 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 2514 mdb_printf("Attribute does not exist\n"); 2515 return (DCMD_ERR); 2516 } 2517 } 2518 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 2519 mdb_printf("%p\n", attr_addr); 2520 return (DCMD_OK); 2521 } 2522 2523 /* ARGSUSED */ 2524 static int 2525 zfs_ace_print_common(uintptr_t addr, uint_t flags, 2526 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 2527 uint16_t ace_type, int verbose) 2528 { 2529 if (DCMD_HDRSPEC(flags) && !verbose) 2530 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 2531 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 2532 2533 if (!verbose) { 2534 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 2535 ace_flags, access_mask, ace_type, id); 2536 return (DCMD_OK); 2537 } 2538 2539 switch (ace_flags & ACE_TYPE_FLAGS) { 2540 case ACE_OWNER: 2541 mdb_printf("owner@:"); 2542 break; 2543 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2544 mdb_printf("group@:"); 2545 break; 2546 case ACE_EVERYONE: 2547 mdb_printf("everyone@:"); 2548 break; 2549 case ACE_IDENTIFIER_GROUP: 2550 mdb_printf("group:%llx:", (u_longlong_t)id); 2551 break; 2552 case 0: /* User entry */ 2553 mdb_printf("user:%llx:", (u_longlong_t)id); 2554 break; 2555 } 2556 2557 /* print out permission mask */ 2558 if (access_mask & ACE_READ_DATA) 2559 mdb_printf("r"); 2560 else 2561 mdb_printf("-"); 2562 if (access_mask & ACE_WRITE_DATA) 2563 mdb_printf("w"); 2564 else 2565 mdb_printf("-"); 2566 if (access_mask & ACE_EXECUTE) 2567 mdb_printf("x"); 2568 else 2569 mdb_printf("-"); 2570 if (access_mask & ACE_APPEND_DATA) 2571 mdb_printf("p"); 2572 else 2573 mdb_printf("-"); 2574 if (access_mask & ACE_DELETE) 2575 mdb_printf("d"); 2576 else 2577 mdb_printf("-"); 2578 if (access_mask & ACE_DELETE_CHILD) 2579 mdb_printf("D"); 2580 else 2581 mdb_printf("-"); 2582 if (access_mask & ACE_READ_ATTRIBUTES) 2583 mdb_printf("a"); 2584 else 2585 mdb_printf("-"); 2586 if (access_mask & ACE_WRITE_ATTRIBUTES) 2587 mdb_printf("A"); 2588 else 2589 mdb_printf("-"); 2590 if (access_mask & ACE_READ_NAMED_ATTRS) 2591 mdb_printf("R"); 2592 else 2593 mdb_printf("-"); 2594 if (access_mask & ACE_WRITE_NAMED_ATTRS) 2595 mdb_printf("W"); 2596 else 2597 mdb_printf("-"); 2598 if (access_mask & ACE_READ_ACL) 2599 mdb_printf("c"); 2600 else 2601 mdb_printf("-"); 2602 if (access_mask & ACE_WRITE_ACL) 2603 mdb_printf("C"); 2604 else 2605 mdb_printf("-"); 2606 if (access_mask & ACE_WRITE_OWNER) 2607 mdb_printf("o"); 2608 else 2609 mdb_printf("-"); 2610 if (access_mask & ACE_SYNCHRONIZE) 2611 mdb_printf("s"); 2612 else 2613 mdb_printf("-"); 2614 2615 mdb_printf(":"); 2616 2617 /* Print out inheritance flags */ 2618 if (ace_flags & ACE_FILE_INHERIT_ACE) 2619 mdb_printf("f"); 2620 else 2621 mdb_printf("-"); 2622 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 2623 mdb_printf("d"); 2624 else 2625 mdb_printf("-"); 2626 if (ace_flags & ACE_INHERIT_ONLY_ACE) 2627 mdb_printf("i"); 2628 else 2629 mdb_printf("-"); 2630 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 2631 mdb_printf("n"); 2632 else 2633 mdb_printf("-"); 2634 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 2635 mdb_printf("S"); 2636 else 2637 mdb_printf("-"); 2638 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 2639 mdb_printf("F"); 2640 else 2641 mdb_printf("-"); 2642 if (ace_flags & ACE_INHERITED_ACE) 2643 mdb_printf("I"); 2644 else 2645 mdb_printf("-"); 2646 2647 switch (ace_type) { 2648 case ACE_ACCESS_ALLOWED_ACE_TYPE: 2649 mdb_printf(":allow\n"); 2650 break; 2651 case ACE_ACCESS_DENIED_ACE_TYPE: 2652 mdb_printf(":deny\n"); 2653 break; 2654 case ACE_SYSTEM_AUDIT_ACE_TYPE: 2655 mdb_printf(":audit\n"); 2656 break; 2657 case ACE_SYSTEM_ALARM_ACE_TYPE: 2658 mdb_printf(":alarm\n"); 2659 break; 2660 default: 2661 mdb_printf(":?\n"); 2662 } 2663 return (DCMD_OK); 2664 } 2665 2666 /* ARGSUSED */ 2667 static int 2668 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2669 { 2670 zfs_ace_t zace; 2671 int verbose = FALSE; 2672 uint64_t id; 2673 2674 if (!(flags & DCMD_ADDRSPEC)) 2675 return (DCMD_USAGE); 2676 2677 if (mdb_getopts(argc, argv, 2678 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2679 return (DCMD_USAGE); 2680 2681 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 2682 mdb_warn("failed to read zfs_ace_t"); 2683 return (DCMD_ERR); 2684 } 2685 2686 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 2687 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2688 id = zace.z_fuid; 2689 else 2690 id = -1; 2691 2692 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 2693 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 2694 } 2695 2696 /* ARGSUSED */ 2697 static int 2698 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2699 { 2700 ace_t ace; 2701 uint64_t id; 2702 int verbose = FALSE; 2703 2704 if (!(flags & DCMD_ADDRSPEC)) 2705 return (DCMD_USAGE); 2706 2707 if (mdb_getopts(argc, argv, 2708 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2709 return (DCMD_USAGE); 2710 2711 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 2712 mdb_warn("failed to read ace_t"); 2713 return (DCMD_ERR); 2714 } 2715 2716 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 2717 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2718 id = ace.a_who; 2719 else 2720 id = -1; 2721 2722 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 2723 ace.a_flags, ace.a_type, verbose)); 2724 } 2725 2726 typedef struct acl_dump_args { 2727 int a_argc; 2728 const mdb_arg_t *a_argv; 2729 uint16_t a_version; 2730 int a_flags; 2731 } acl_dump_args_t; 2732 2733 /* ARGSUSED */ 2734 static int 2735 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 2736 { 2737 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2738 2739 if (acl_args->a_version == 1) { 2740 if (mdb_call_dcmd("zfs_ace", addr, 2741 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2742 acl_args->a_argv) != DCMD_OK) { 2743 return (WALK_ERR); 2744 } 2745 } else { 2746 if (mdb_call_dcmd("zfs_ace0", addr, 2747 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2748 acl_args->a_argv) != DCMD_OK) { 2749 return (WALK_ERR); 2750 } 2751 } 2752 acl_args->a_flags = DCMD_LOOP; 2753 return (WALK_NEXT); 2754 } 2755 2756 /* ARGSUSED */ 2757 static int 2758 acl_cb(uintptr_t addr, const void *unknown, void *arg) 2759 { 2760 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2761 2762 if (acl_args->a_version == 1) { 2763 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 2764 arg, addr) != 0) { 2765 mdb_warn("can't walk ACEs"); 2766 return (DCMD_ERR); 2767 } 2768 } else { 2769 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 2770 arg, addr) != 0) { 2771 mdb_warn("can't walk ACEs"); 2772 return (DCMD_ERR); 2773 } 2774 } 2775 return (WALK_NEXT); 2776 } 2777 2778 /* ARGSUSED */ 2779 static int 2780 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2781 { 2782 zfs_acl_t zacl; 2783 int verbose = FALSE; 2784 acl_dump_args_t acl_args; 2785 2786 if (!(flags & DCMD_ADDRSPEC)) 2787 return (DCMD_USAGE); 2788 2789 if (mdb_getopts(argc, argv, 2790 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2791 return (DCMD_USAGE); 2792 2793 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 2794 mdb_warn("failed to read zfs_acl_t"); 2795 return (DCMD_ERR); 2796 } 2797 2798 acl_args.a_argc = argc; 2799 acl_args.a_argv = argv; 2800 acl_args.a_version = zacl.z_version; 2801 acl_args.a_flags = DCMD_LOOPFIRST; 2802 2803 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 2804 mdb_warn("can't walk ACL"); 2805 return (DCMD_ERR); 2806 } 2807 2808 return (DCMD_OK); 2809 } 2810 2811 /* ARGSUSED */ 2812 static int 2813 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 2814 { 2815 if (wsp->walk_addr == NULL) { 2816 mdb_warn("must supply address of zfs_acl_node_t\n"); 2817 return (WALK_ERR); 2818 } 2819 2820 wsp->walk_addr += 2821 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); 2822 2823 if (mdb_layered_walk("list", wsp) == -1) { 2824 mdb_warn("failed to walk 'list'\n"); 2825 return (WALK_ERR); 2826 } 2827 2828 return (WALK_NEXT); 2829 } 2830 2831 static int 2832 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 2833 { 2834 zfs_acl_node_t aclnode; 2835 2836 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 2837 wsp->walk_addr) == -1) { 2838 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 2839 return (WALK_ERR); 2840 } 2841 2842 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 2843 } 2844 2845 typedef struct ace_walk_data { 2846 int ace_count; 2847 int ace_version; 2848 } ace_walk_data_t; 2849 2850 static int 2851 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 2852 int ace_count, uintptr_t ace_data) 2853 { 2854 ace_walk_data_t *ace_walk_data; 2855 2856 if (wsp->walk_addr == NULL) { 2857 mdb_warn("must supply address of zfs_acl_node_t\n"); 2858 return (WALK_ERR); 2859 } 2860 2861 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 2862 2863 ace_walk_data->ace_count = ace_count; 2864 ace_walk_data->ace_version = version; 2865 2866 wsp->walk_addr = ace_data; 2867 wsp->walk_data = ace_walk_data; 2868 2869 return (WALK_NEXT); 2870 } 2871 2872 static int 2873 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 2874 { 2875 static int gotid; 2876 static mdb_ctf_id_t acl_id; 2877 int z_ace_count; 2878 uintptr_t z_acldata; 2879 2880 if (!gotid) { 2881 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 2882 &acl_id) == -1) { 2883 mdb_warn("couldn't find struct zfs_acl_node"); 2884 return (DCMD_ERR); 2885 } 2886 gotid = TRUE; 2887 } 2888 2889 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 2890 return (DCMD_ERR); 2891 } 2892 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 2893 return (DCMD_ERR); 2894 } 2895 2896 return (zfs_aces_walk_init_common(wsp, version, 2897 z_ace_count, z_acldata)); 2898 } 2899 2900 /* ARGSUSED */ 2901 static int 2902 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 2903 { 2904 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 2905 } 2906 2907 /* ARGSUSED */ 2908 static int 2909 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 2910 { 2911 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 2912 } 2913 2914 static int 2915 zfs_aces_walk_step(mdb_walk_state_t *wsp) 2916 { 2917 ace_walk_data_t *ace_data = wsp->walk_data; 2918 zfs_ace_t zace; 2919 ace_t *acep; 2920 int status; 2921 int entry_type; 2922 int allow_type; 2923 uintptr_t ptr; 2924 2925 if (ace_data->ace_count == 0) 2926 return (WALK_DONE); 2927 2928 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 2929 mdb_warn("failed to read zfs_ace_t at %#lx", 2930 wsp->walk_addr); 2931 return (WALK_ERR); 2932 } 2933 2934 switch (ace_data->ace_version) { 2935 case 0: 2936 acep = (ace_t *)&zace; 2937 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 2938 allow_type = acep->a_type; 2939 break; 2940 case 1: 2941 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 2942 allow_type = zace.z_hdr.z_type; 2943 break; 2944 default: 2945 return (WALK_ERR); 2946 } 2947 2948 ptr = (uintptr_t)wsp->walk_addr; 2949 switch (entry_type) { 2950 case ACE_OWNER: 2951 case ACE_EVERYONE: 2952 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2953 ptr += ace_data->ace_version == 0 ? 2954 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 2955 break; 2956 case ACE_IDENTIFIER_GROUP: 2957 default: 2958 switch (allow_type) { 2959 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 2960 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 2961 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 2962 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 2963 ptr += ace_data->ace_version == 0 ? 2964 sizeof (ace_t) : sizeof (zfs_object_ace_t); 2965 break; 2966 default: 2967 ptr += ace_data->ace_version == 0 ? 2968 sizeof (ace_t) : sizeof (zfs_ace_t); 2969 break; 2970 } 2971 } 2972 2973 ace_data->ace_count--; 2974 status = wsp->walk_callback(wsp->walk_addr, 2975 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 2976 2977 wsp->walk_addr = ptr; 2978 return (status); 2979 } 2980 2981 typedef struct mdb_zfs_rrwlock { 2982 uintptr_t rr_writer; 2983 boolean_t rr_writer_wanted; 2984 } mdb_zfs_rrwlock_t; 2985 2986 static uint_t rrw_key; 2987 2988 /* ARGSUSED */ 2989 static int 2990 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2991 { 2992 mdb_zfs_rrwlock_t rrw; 2993 2994 if (rrw_key == 0) { 2995 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) 2996 return (DCMD_ERR); 2997 } 2998 2999 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 3000 0) == -1) 3001 return (DCMD_ERR); 3002 3003 if (rrw.rr_writer != 0) { 3004 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer); 3005 return (DCMD_OK); 3006 } 3007 3008 if (rrw.rr_writer_wanted) { 3009 mdb_printf("writer wanted\n"); 3010 } 3011 3012 mdb_printf("anonymous references:\n"); 3013 (void) mdb_call_dcmd("refcount", addr + 3014 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), 3015 DCMD_ADDRSPEC, 0, NULL); 3016 3017 mdb_printf("linked references:\n"); 3018 (void) mdb_call_dcmd("refcount", addr + 3019 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), 3020 DCMD_ADDRSPEC, 0, NULL); 3021 3022 /* 3023 * XXX This should find references from 3024 * "::walk thread | ::tsd -v <rrw_key>", but there is no support 3025 * for programmatic consumption of dcmds, so this would be 3026 * difficult, potentially requiring reimplementing ::tsd (both 3027 * user and kernel versions) in this MDB module. 3028 */ 3029 3030 return (DCMD_OK); 3031 } 3032 3033 /* 3034 * MDB module linkage information: 3035 * 3036 * We declare a list of structures describing our dcmds, and a function 3037 * named _mdb_init to return a pointer to our module information. 3038 */ 3039 3040 static const mdb_dcmd_t dcmds[] = { 3041 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 3042 { "blkptr", ":", "print blkptr_t", blkptr }, 3043 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 3044 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 3045 { "dbufs", 3046 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 3047 "[-o object | \"mdn\"] \n" 3048 "\t[-l level] [-b blkid | \"bonus\"]", 3049 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 3050 { "abuf_find", "dva_word[0] dva_word[1]", 3051 "find arc_buf_hdr_t of a specified DVA", 3052 abuf_find }, 3053 { "spa", "?[-cv]", "spa_t summary", spa_print }, 3054 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 3055 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 3056 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs }, 3057 { "vdev", ":[-re]\n" 3058 "\t-r display recursively\n" 3059 "\t-e print statistics", 3060 "vdev_t summary", vdev_print }, 3061 { "zio", ":[cpr]\n" 3062 "\t-c display children\n" 3063 "\t-p display parents\n" 3064 "\t-r display recursively", 3065 "zio_t summary", zio_print }, 3066 { "zio_state", "?", "print out all zio_t structures on system or " 3067 "for a particular pool", zio_state }, 3068 { "zfs_blkstats", ":[-v]", 3069 "given a spa_t, print block type stats from last scrub", 3070 zfs_blkstats }, 3071 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 3072 { "refcount", ":[-r]\n" 3073 "\t-r display recently removed references", 3074 "print refcount_t holders", refcount }, 3075 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 3076 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 3077 zfs_acl_dump }, 3078 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 3079 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 3080 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 3081 sa_attr_table}, 3082 { "sa_attr", ": attr_id", 3083 "print SA attribute address when given sa_handle_t", sa_attr_print}, 3084 { "zfs_dbgmsg", ":[-va]", 3085 "print zfs debug log", dbgmsg}, 3086 { "rrwlock", ":", 3087 "print rrwlock_t, including readers", rrwlock}, 3088 { NULL } 3089 }; 3090 3091 static const mdb_walker_t walkers[] = { 3092 { "zms_freelist", "walk ZFS metaslab freelist", 3093 freelist_walk_init, freelist_walk_step, NULL }, 3094 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 3095 txg_list_walk_init, txg_list_walk_step, NULL }, 3096 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 3097 txg_list0_walk_init, txg_list_walk_step, NULL }, 3098 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 3099 txg_list1_walk_init, txg_list_walk_step, NULL }, 3100 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 3101 txg_list2_walk_init, txg_list_walk_step, NULL }, 3102 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 3103 txg_list3_walk_init, txg_list_walk_step, NULL }, 3104 { "zio", "walk all zio structures, optionally for a particular spa_t", 3105 zio_walk_init, zio_walk_step, NULL }, 3106 { "zio_root", 3107 "walk all root zio_t structures, optionally for a particular spa_t", 3108 zio_walk_init, zio_walk_root_step, NULL }, 3109 { "spa", "walk all spa_t entries in the namespace", 3110 spa_walk_init, spa_walk_step, NULL }, 3111 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 3112 metaslab_walk_init, metaslab_walk_step, NULL }, 3113 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 3114 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 3115 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 3116 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 3117 { "zfs_acl_node_aces0", 3118 "given a zfs_acl_node_t, walk all ACEs as ace_t", 3119 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 3120 { NULL } 3121 }; 3122 3123 static const mdb_modinfo_t modinfo = { 3124 MDB_API_VERSION, dcmds, walkers 3125 }; 3126 3127 const mdb_modinfo_t * 3128 _mdb_init(void) 3129 { 3130 return (&modinfo); 3131 } 3132