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 "arc_lotsfree_percent", 278 "zfs_dirty_data_max", 279 "zfs_dirty_data_sync", 280 "zfs_delay_max_ns", 281 "zfs_delay_min_dirty_percent", 282 "zfs_delay_scale", 283 "zfs_vdev_max_active", 284 "zfs_vdev_sync_read_min_active", 285 "zfs_vdev_sync_read_max_active", 286 "zfs_vdev_sync_write_min_active", 287 "zfs_vdev_sync_write_max_active", 288 "zfs_vdev_async_read_min_active", 289 "zfs_vdev_async_read_max_active", 290 "zfs_vdev_async_write_min_active", 291 "zfs_vdev_async_write_max_active", 292 "zfs_vdev_scrub_min_active", 293 "zfs_vdev_scrub_max_active", 294 "zfs_vdev_async_write_active_min_dirty_percent", 295 "zfs_vdev_async_write_active_max_dirty_percent", 296 "spa_asize_inflation", 297 "zfs_arc_max", 298 "zfs_arc_min", 299 "arc_shrink_shift", 300 "zfs_mdcomp_disable", 301 "zfs_prefetch_disable", 302 "zfetch_max_streams", 303 "zfetch_min_sec_reap", 304 "zfetch_block_cap", 305 "zfetch_array_rd_sz", 306 "zfs_default_bs", 307 "zfs_default_ibs", 308 "metaslab_aliquot", 309 "reference_tracking_enable", 310 "reference_history", 311 "spa_max_replication_override", 312 "spa_mode_global", 313 "zfs_flags", 314 "zfs_txg_timeout", 315 "zfs_vdev_cache_max", 316 "zfs_vdev_cache_size", 317 "zfs_vdev_cache_bshift", 318 "vdev_mirror_shift", 319 "zfs_scrub_limit", 320 "zfs_no_scrub_io", 321 "zfs_no_scrub_prefetch", 322 "zfs_vdev_aggregation_limit", 323 "fzap_default_block_shift", 324 "zfs_immediate_write_sz", 325 "zfs_read_chunk_size", 326 "zfs_nocacheflush", 327 "zil_replay_disable", 328 "metaslab_gang_bang", 329 "metaslab_df_alloc_threshold", 330 "metaslab_df_free_pct", 331 "zio_injection_enabled", 332 "zvol_immediate_write_sz", 333 }; 334 335 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 336 int sz; 337 uint64_t val64; 338 uint32_t *val32p = (uint32_t *)&val64; 339 340 sz = mdb_readvar(&val64, params[i]); 341 if (sz == 4) { 342 mdb_printf("%s = 0x%x\n", params[i], *val32p); 343 } else if (sz == 8) { 344 mdb_printf("%s = 0x%llx\n", params[i], val64); 345 } else { 346 mdb_warn("variable %s not found", params[i]); 347 } 348 } 349 350 return (DCMD_OK); 351 } 352 353 /* ARGSUSED */ 354 static int 355 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 356 { 357 mdb_ctf_id_t type_enum, checksum_enum, compress_enum; 358 char type[80], checksum[80], compress[80]; 359 blkptr_t blk, *bp = &blk; 360 char buf[BP_SPRINTF_LEN]; 361 362 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { 363 mdb_warn("failed to read blkptr_t"); 364 return (DCMD_ERR); 365 } 366 367 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 || 368 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 || 369 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) { 370 mdb_warn("Could not find blkptr enumerated types"); 371 return (DCMD_ERR); 372 } 373 374 enum_lookup(type, sizeof (type), type_enum, 375 BP_GET_TYPE(bp), "DMU_OT_"); 376 enum_lookup(checksum, sizeof (checksum), checksum_enum, 377 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_"); 378 enum_lookup(compress, sizeof (compress), compress_enum, 379 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_"); 380 381 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type, 382 checksum, compress); 383 384 mdb_printf("%s\n", buf); 385 386 return (DCMD_OK); 387 } 388 389 typedef struct mdb_dmu_buf_impl { 390 struct { 391 uint64_t db_object; 392 } db; 393 uintptr_t db_objset; 394 uint64_t db_level; 395 uint64_t db_blkid; 396 struct { 397 uint64_t rc_count; 398 } db_holds; 399 } mdb_dmu_buf_impl_t; 400 401 /* ARGSUSED */ 402 static int 403 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 404 { 405 mdb_dmu_buf_impl_t db; 406 char objectname[32]; 407 char blkidname[32]; 408 char path[MAXNAMELEN]; 409 410 if (DCMD_HDRSPEC(flags)) 411 mdb_printf(" addr object lvl blkid holds os\n"); 412 413 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 414 addr, 0) == -1) 415 return (DCMD_ERR); 416 417 if (db.db.db_object == DMU_META_DNODE_OBJECT) 418 (void) strcpy(objectname, "mdn"); 419 else 420 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 421 (u_longlong_t)db.db.db_object); 422 423 if (db.db_blkid == DMU_BONUS_BLKID) 424 (void) strcpy(blkidname, "bonus"); 425 else 426 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 427 (u_longlong_t)db.db_blkid); 428 429 if (objset_name(db.db_objset, path)) { 430 return (DCMD_ERR); 431 } 432 433 mdb_printf("%p %8s %1u %9s %2llu %s\n", addr, 434 objectname, (int)db.db_level, blkidname, 435 db.db_holds.rc_count, path); 436 437 return (DCMD_OK); 438 } 439 440 /* ARGSUSED */ 441 static int 442 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 443 { 444 #define HISTOSZ 32 445 uintptr_t dbp; 446 dmu_buf_impl_t db; 447 dbuf_hash_table_t ht; 448 uint64_t bucket, ndbufs; 449 uint64_t histo[HISTOSZ]; 450 uint64_t histo2[HISTOSZ]; 451 int i, maxidx; 452 453 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 454 mdb_warn("failed to read 'dbuf_hash_table'"); 455 return (DCMD_ERR); 456 } 457 458 for (i = 0; i < HISTOSZ; i++) { 459 histo[i] = 0; 460 histo2[i] = 0; 461 } 462 463 ndbufs = 0; 464 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 465 int len; 466 467 if (mdb_vread(&dbp, sizeof (void *), 468 (uintptr_t)(ht.hash_table+bucket)) == -1) { 469 mdb_warn("failed to read hash bucket %u at %p", 470 bucket, ht.hash_table+bucket); 471 return (DCMD_ERR); 472 } 473 474 len = 0; 475 while (dbp != 0) { 476 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 477 dbp) == -1) { 478 mdb_warn("failed to read dbuf at %p", dbp); 479 return (DCMD_ERR); 480 } 481 dbp = (uintptr_t)db.db_hash_next; 482 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 483 histo2[i]++; 484 len++; 485 ndbufs++; 486 } 487 488 if (len >= HISTOSZ) 489 len = HISTOSZ-1; 490 histo[len]++; 491 } 492 493 mdb_printf("hash table has %llu buckets, %llu dbufs " 494 "(avg %llu buckets/dbuf)\n", 495 ht.hash_table_mask+1, ndbufs, 496 (ht.hash_table_mask+1)/ndbufs); 497 498 mdb_printf("\n"); 499 maxidx = 0; 500 for (i = 0; i < HISTOSZ; i++) 501 if (histo[i] > 0) 502 maxidx = i; 503 mdb_printf("hash chain length number of buckets\n"); 504 for (i = 0; i <= maxidx; i++) 505 mdb_printf("%u %llu\n", i, histo[i]); 506 507 mdb_printf("\n"); 508 maxidx = 0; 509 for (i = 0; i < HISTOSZ; i++) 510 if (histo2[i] > 0) 511 maxidx = i; 512 mdb_printf("hash chain depth number of dbufs\n"); 513 for (i = 0; i <= maxidx; i++) 514 mdb_printf("%u or more %llu %llu%%\n", 515 i, histo2[i], histo2[i]*100/ndbufs); 516 517 518 return (DCMD_OK); 519 } 520 521 #define CHAIN_END 0xffff 522 /* 523 * ::zap_leaf [-v] 524 * 525 * Print a zap_leaf_phys_t, assumed to be 16k 526 */ 527 /* ARGSUSED */ 528 static int 529 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 530 { 531 char buf[16*1024]; 532 int verbose = B_FALSE; 533 int four = B_FALSE; 534 zap_leaf_t l; 535 zap_leaf_phys_t *zlp = (void *)buf; 536 int i; 537 538 if (mdb_getopts(argc, argv, 539 'v', MDB_OPT_SETBITS, TRUE, &verbose, 540 '4', MDB_OPT_SETBITS, TRUE, &four, 541 NULL) != argc) 542 return (DCMD_USAGE); 543 544 l.l_phys = zlp; 545 l.l_bs = 14; /* assume 16k blocks */ 546 if (four) 547 l.l_bs = 12; 548 549 if (!(flags & DCMD_ADDRSPEC)) { 550 return (DCMD_USAGE); 551 } 552 553 if (mdb_vread(buf, sizeof (buf), addr) == -1) { 554 mdb_warn("failed to read zap_leaf_phys_t at %p", addr); 555 return (DCMD_ERR); 556 } 557 558 if (zlp->l_hdr.lh_block_type != ZBT_LEAF || 559 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { 560 mdb_warn("This does not appear to be a zap_leaf_phys_t"); 561 return (DCMD_ERR); 562 } 563 564 mdb_printf("zap_leaf_phys_t at %p:\n", addr); 565 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); 566 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); 567 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); 568 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, 569 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); 570 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); 571 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, 572 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? 573 "ENTRIES_CDSORTED" : ""); 574 575 if (verbose) { 576 mdb_printf(" hash table:\n"); 577 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { 578 if (zlp->l_hash[i] != CHAIN_END) 579 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); 580 } 581 } 582 583 mdb_printf(" chunks:\n"); 584 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { 585 /* LINTED: alignment */ 586 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); 587 switch (zlc->l_entry.le_type) { 588 case ZAP_CHUNK_FREE: 589 if (verbose) { 590 mdb_printf(" %u: free; lf_next = %u\n", 591 i, zlc->l_free.lf_next); 592 } 593 break; 594 case ZAP_CHUNK_ENTRY: 595 mdb_printf(" %u: entry\n", i); 596 if (verbose) { 597 mdb_printf(" le_next = %u\n", 598 zlc->l_entry.le_next); 599 } 600 mdb_printf(" le_name_chunk = %u\n", 601 zlc->l_entry.le_name_chunk); 602 mdb_printf(" le_name_numints = %u\n", 603 zlc->l_entry.le_name_numints); 604 mdb_printf(" le_value_chunk = %u\n", 605 zlc->l_entry.le_value_chunk); 606 mdb_printf(" le_value_intlen = %u\n", 607 zlc->l_entry.le_value_intlen); 608 mdb_printf(" le_value_numints = %u\n", 609 zlc->l_entry.le_value_numints); 610 mdb_printf(" le_cd = %u\n", 611 zlc->l_entry.le_cd); 612 mdb_printf(" le_hash = %llx\n", 613 zlc->l_entry.le_hash); 614 break; 615 case ZAP_CHUNK_ARRAY: 616 mdb_printf(" %u: array", i); 617 if (strisprint((char *)zlc->l_array.la_array)) 618 mdb_printf(" \"%s\"", zlc->l_array.la_array); 619 mdb_printf("\n"); 620 if (verbose) { 621 int j; 622 mdb_printf(" "); 623 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { 624 mdb_printf("%02x ", 625 zlc->l_array.la_array[j]); 626 } 627 mdb_printf("\n"); 628 } 629 if (zlc->l_array.la_next != CHAIN_END) { 630 mdb_printf(" lf_next = %u\n", 631 zlc->l_array.la_next); 632 } 633 break; 634 default: 635 mdb_printf(" %u: undefined type %u\n", 636 zlc->l_entry.le_type); 637 } 638 } 639 640 return (DCMD_OK); 641 } 642 643 typedef struct dbufs_data { 644 mdb_ctf_id_t id; 645 uint64_t objset; 646 uint64_t object; 647 uint64_t level; 648 uint64_t blkid; 649 char *osname; 650 } dbufs_data_t; 651 652 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 653 654 /* ARGSUSED */ 655 static int 656 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 657 { 658 dbufs_data_t *data = arg; 659 uintptr_t objset; 660 dmu_buf_t db; 661 uint8_t level; 662 uint64_t blkid; 663 char osname[MAXNAMELEN]; 664 665 if (GETMEMBID(addr, &data->id, db_objset, objset) || 666 GETMEMBID(addr, &data->id, db, db) || 667 GETMEMBID(addr, &data->id, db_level, level) || 668 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 669 return (WALK_ERR); 670 } 671 672 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 673 (data->osname == NULL || (objset_name(objset, osname) == 0 && 674 strcmp(data->osname, osname) == 0)) && 675 (data->object == DBUFS_UNSET || data->object == db.db_object) && 676 (data->level == DBUFS_UNSET || data->level == level) && 677 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 678 mdb_printf("%#lr\n", addr); 679 } 680 return (WALK_NEXT); 681 } 682 683 /* ARGSUSED */ 684 static int 685 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 686 { 687 dbufs_data_t data; 688 char *object = NULL; 689 char *blkid = NULL; 690 691 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 692 data.osname = NULL; 693 694 if (mdb_getopts(argc, argv, 695 'O', MDB_OPT_UINT64, &data.objset, 696 'n', MDB_OPT_STR, &data.osname, 697 'o', MDB_OPT_STR, &object, 698 'l', MDB_OPT_UINT64, &data.level, 699 'b', MDB_OPT_STR, &blkid) != argc) { 700 return (DCMD_USAGE); 701 } 702 703 if (object) { 704 if (strcmp(object, "mdn") == 0) { 705 data.object = DMU_META_DNODE_OBJECT; 706 } else { 707 data.object = mdb_strtoull(object); 708 } 709 } 710 711 if (blkid) { 712 if (strcmp(blkid, "bonus") == 0) { 713 data.blkid = DMU_BONUS_BLKID; 714 } else { 715 data.blkid = mdb_strtoull(blkid); 716 } 717 } 718 719 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) { 720 mdb_warn("couldn't find struct dmu_buf_impl_t"); 721 return (DCMD_ERR); 722 } 723 724 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 725 mdb_warn("can't walk dbufs"); 726 return (DCMD_ERR); 727 } 728 729 return (DCMD_OK); 730 } 731 732 typedef struct abuf_find_data { 733 dva_t dva; 734 mdb_ctf_id_t id; 735 } abuf_find_data_t; 736 737 /* ARGSUSED */ 738 static int 739 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 740 { 741 abuf_find_data_t *data = arg; 742 dva_t dva; 743 744 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 745 return (WALK_ERR); 746 } 747 748 if (dva.dva_word[0] == data->dva.dva_word[0] && 749 dva.dva_word[1] == data->dva.dva_word[1]) { 750 mdb_printf("%#lr\n", addr); 751 } 752 return (WALK_NEXT); 753 } 754 755 /* ARGSUSED */ 756 static int 757 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 758 { 759 abuf_find_data_t data; 760 GElf_Sym sym; 761 int i; 762 const char *syms[] = { 763 "ARC_mru", 764 "ARC_mru_ghost", 765 "ARC_mfu", 766 "ARC_mfu_ghost", 767 }; 768 769 if (argc != 2) 770 return (DCMD_USAGE); 771 772 for (i = 0; i < 2; i ++) { 773 switch (argv[i].a_type) { 774 case MDB_TYPE_STRING: 775 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 776 break; 777 case MDB_TYPE_IMMEDIATE: 778 data.dva.dva_word[i] = argv[i].a_un.a_val; 779 break; 780 default: 781 return (DCMD_USAGE); 782 } 783 } 784 785 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) { 786 mdb_warn("couldn't find struct arc_buf_hdr"); 787 return (DCMD_ERR); 788 } 789 790 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 791 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) { 792 mdb_warn("can't find symbol %s", syms[i]); 793 return (DCMD_ERR); 794 } 795 796 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 797 mdb_warn("can't walk %s", syms[i]); 798 return (DCMD_ERR); 799 } 800 } 801 802 return (DCMD_OK); 803 } 804 805 806 typedef struct dbgmsg_arg { 807 boolean_t da_verbose; 808 boolean_t da_address; 809 } dbgmsg_arg_t; 810 811 /* ARGSUSED */ 812 static int 813 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 814 { 815 static mdb_ctf_id_t id; 816 static boolean_t gotid; 817 static ulong_t off; 818 819 dbgmsg_arg_t *da = arg; 820 time_t timestamp; 821 char buf[1024]; 822 823 if (!gotid) { 824 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == 825 -1) { 826 mdb_warn("couldn't find struct zfs_dbgmsg"); 827 return (WALK_ERR); 828 } 829 gotid = TRUE; 830 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 831 mdb_warn("couldn't find zdm_msg"); 832 return (WALK_ERR); 833 } 834 off /= 8; 835 } 836 837 838 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 839 return (WALK_ERR); 840 } 841 842 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 843 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 844 return (DCMD_ERR); 845 } 846 847 if (da->da_address) 848 mdb_printf("%p ", addr); 849 if (da->da_verbose) 850 mdb_printf("%Y ", timestamp); 851 852 mdb_printf("%s\n", buf); 853 854 if (da->da_verbose) 855 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 856 857 return (WALK_NEXT); 858 } 859 860 /* ARGSUSED */ 861 static int 862 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 863 { 864 GElf_Sym sym; 865 dbgmsg_arg_t da = { 0 }; 866 867 if (mdb_getopts(argc, argv, 868 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 869 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, 870 NULL) != argc) 871 return (DCMD_USAGE); 872 873 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { 874 mdb_warn("can't find zfs_dbgmsgs"); 875 return (DCMD_ERR); 876 } 877 878 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { 879 mdb_warn("can't walk zfs_dbgmsgs"); 880 return (DCMD_ERR); 881 } 882 883 return (DCMD_OK); 884 } 885 886 /*ARGSUSED*/ 887 static int 888 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 889 { 890 kstat_named_t *stats; 891 GElf_Sym sym; 892 int nstats, i; 893 uint_t opt_a = FALSE; 894 uint_t opt_b = FALSE; 895 uint_t shift = 0; 896 const char *suffix; 897 898 static const char *bytestats[] = { 899 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 900 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 901 NULL 902 }; 903 904 static const char *extras[] = { 905 "arc_no_grow", "arc_tempreserve", 906 NULL 907 }; 908 909 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) { 910 mdb_warn("failed to find 'arc_stats'"); 911 return (DCMD_ERR); 912 } 913 914 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 915 916 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 917 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 918 return (DCMD_ERR); 919 } 920 921 nstats = sym.st_size / sizeof (kstat_named_t); 922 923 /* NB: -a / opt_a are ignored for backwards compatability */ 924 if (mdb_getopts(argc, argv, 925 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 926 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 927 'k', MDB_OPT_SETBITS, 10, &shift, 928 'm', MDB_OPT_SETBITS, 20, &shift, 929 'g', MDB_OPT_SETBITS, 30, &shift, 930 NULL) != argc) 931 return (DCMD_USAGE); 932 933 if (!opt_b && !shift) 934 shift = 20; 935 936 switch (shift) { 937 case 0: 938 suffix = "B"; 939 break; 940 case 10: 941 suffix = "KB"; 942 break; 943 case 20: 944 suffix = "MB"; 945 break; 946 case 30: 947 suffix = "GB"; 948 break; 949 default: 950 suffix = "XX"; 951 } 952 953 for (i = 0; i < nstats; i++) { 954 int j; 955 boolean_t bytes = B_FALSE; 956 957 for (j = 0; bytestats[j]; j++) { 958 if (strcmp(stats[i].name, bytestats[j]) == 0) { 959 bytes = B_TRUE; 960 break; 961 } 962 } 963 964 if (bytes) { 965 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 966 stats[i].value.ui64 >> shift, suffix); 967 } else { 968 mdb_printf("%-25s = %9llu\n", stats[i].name, 969 stats[i].value.ui64); 970 } 971 } 972 973 for (i = 0; extras[i]; i++) { 974 uint64_t buf; 975 976 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) { 977 mdb_warn("failed to find '%s'", extras[i]); 978 return (DCMD_ERR); 979 } 980 981 if (sym.st_size != sizeof (uint64_t) && 982 sym.st_size != sizeof (uint32_t)) { 983 mdb_warn("expected scalar for variable '%s'\n", 984 extras[i]); 985 return (DCMD_ERR); 986 } 987 988 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 989 mdb_warn("couldn't read '%s'", extras[i]); 990 return (DCMD_ERR); 991 } 992 993 mdb_printf("%-25s = ", extras[i]); 994 995 /* NB: all the 64-bit extras happen to be byte counts */ 996 if (sym.st_size == sizeof (uint64_t)) 997 mdb_printf("%9llu %s\n", buf >> shift, suffix); 998 999 if (sym.st_size == sizeof (uint32_t)) 1000 mdb_printf("%9d\n", *((uint32_t *)&buf)); 1001 } 1002 return (DCMD_OK); 1003 } 1004 1005 typedef struct mdb_spa_print { 1006 pool_state_t spa_state; 1007 char spa_name[MAXNAMELEN]; 1008 } mdb_spa_print_t; 1009 1010 /* 1011 * ::spa 1012 * 1013 * -c Print configuration information as well 1014 * -v Print vdev state 1015 * -e Print vdev error stats 1016 * 1017 * Print a summarized spa_t. When given no arguments, prints out a table of all 1018 * active pools on the system. 1019 */ 1020 /* ARGSUSED */ 1021 static int 1022 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1023 { 1024 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1025 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1026 const char *state; 1027 int config = FALSE; 1028 int vdevs = FALSE; 1029 int errors = FALSE; 1030 1031 if (mdb_getopts(argc, argv, 1032 'c', MDB_OPT_SETBITS, TRUE, &config, 1033 'v', MDB_OPT_SETBITS, TRUE, &vdevs, 1034 'e', MDB_OPT_SETBITS, TRUE, &errors, 1035 NULL) != argc) 1036 return (DCMD_USAGE); 1037 1038 if (!(flags & DCMD_ADDRSPEC)) { 1039 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1040 mdb_warn("can't walk spa"); 1041 return (DCMD_ERR); 1042 } 1043 1044 return (DCMD_OK); 1045 } 1046 1047 if (flags & DCMD_PIPE_OUT) { 1048 mdb_printf("%#lr\n", addr); 1049 return (DCMD_OK); 1050 } 1051 1052 if (DCMD_HDRSPEC(flags)) 1053 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1054 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1055 1056 mdb_spa_print_t spa; 1057 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1) 1058 return (DCMD_ERR); 1059 1060 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1061 state = "UNKNOWN"; 1062 else 1063 state = statetab[spa.spa_state]; 1064 1065 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1066 1067 if (config) { 1068 mdb_printf("\n"); 1069 mdb_inc_indent(4); 1070 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1071 NULL) != DCMD_OK) 1072 return (DCMD_ERR); 1073 mdb_dec_indent(4); 1074 } 1075 1076 if (vdevs || errors) { 1077 mdb_arg_t v; 1078 1079 v.a_type = MDB_TYPE_STRING; 1080 v.a_un.a_str = "-e"; 1081 1082 mdb_printf("\n"); 1083 mdb_inc_indent(4); 1084 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0, 1085 &v) != DCMD_OK) 1086 return (DCMD_ERR); 1087 mdb_dec_indent(4); 1088 } 1089 1090 return (DCMD_OK); 1091 } 1092 1093 typedef struct mdb_spa_config_spa { 1094 uintptr_t spa_config; 1095 } mdb_spa_config_spa_t; 1096 1097 /* 1098 * ::spa_config 1099 * 1100 * Given a spa_t, print the configuration information stored in spa_config. 1101 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1102 * We simply read the value of spa_config and pass off to ::nvlist. 1103 */ 1104 /* ARGSUSED */ 1105 static int 1106 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1107 { 1108 mdb_spa_config_spa_t spa; 1109 1110 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1111 return (DCMD_USAGE); 1112 1113 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", 1114 addr, 0) == -1) 1115 return (DCMD_ERR); 1116 1117 if (spa.spa_config == 0) { 1118 mdb_printf("(none)\n"); 1119 return (DCMD_OK); 1120 } 1121 1122 return (mdb_call_dcmd("nvlist", spa.spa_config, flags, 1123 0, NULL)); 1124 } 1125 1126 /* 1127 * ::vdev 1128 * 1129 * Print out a summarized vdev_t, in the following form: 1130 * 1131 * ADDR STATE AUX DESC 1132 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1133 * 1134 * If '-r' is specified, recursively visit all children. 1135 * 1136 * With '-e', the statistics associated with the vdev are printed as well. 1137 */ 1138 static int 1139 do_print_vdev(uintptr_t addr, int flags, int depth, int stats, 1140 int recursive) 1141 { 1142 vdev_t vdev; 1143 char desc[MAXNAMELEN]; 1144 int c, children; 1145 uintptr_t *child; 1146 const char *state, *aux; 1147 1148 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1149 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1150 return (DCMD_ERR); 1151 } 1152 1153 if (flags & DCMD_PIPE_OUT) { 1154 mdb_printf("%#lr\n", addr); 1155 } else { 1156 if (vdev.vdev_path != NULL) { 1157 if (mdb_readstr(desc, sizeof (desc), 1158 (uintptr_t)vdev.vdev_path) == -1) { 1159 mdb_warn("failed to read vdev_path at %p\n", 1160 vdev.vdev_path); 1161 return (DCMD_ERR); 1162 } 1163 } else if (vdev.vdev_ops != NULL) { 1164 vdev_ops_t ops; 1165 if (mdb_vread(&ops, sizeof (ops), 1166 (uintptr_t)vdev.vdev_ops) == -1) { 1167 mdb_warn("failed to read vdev_ops at %p\n", 1168 vdev.vdev_ops); 1169 return (DCMD_ERR); 1170 } 1171 (void) strcpy(desc, ops.vdev_op_type); 1172 } else { 1173 (void) strcpy(desc, "<unknown>"); 1174 } 1175 1176 if (depth == 0 && DCMD_HDRSPEC(flags)) 1177 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1178 "ADDR", "STATE", "AUX", 1179 sizeof (uintptr_t) == 4 ? 43 : 35, 1180 "DESCRIPTION"); 1181 1182 mdb_printf("%0?p ", addr); 1183 1184 switch (vdev.vdev_state) { 1185 case VDEV_STATE_CLOSED: 1186 state = "CLOSED"; 1187 break; 1188 case VDEV_STATE_OFFLINE: 1189 state = "OFFLINE"; 1190 break; 1191 case VDEV_STATE_CANT_OPEN: 1192 state = "CANT_OPEN"; 1193 break; 1194 case VDEV_STATE_DEGRADED: 1195 state = "DEGRADED"; 1196 break; 1197 case VDEV_STATE_HEALTHY: 1198 state = "HEALTHY"; 1199 break; 1200 case VDEV_STATE_REMOVED: 1201 state = "REMOVED"; 1202 break; 1203 case VDEV_STATE_FAULTED: 1204 state = "FAULTED"; 1205 break; 1206 default: 1207 state = "UNKNOWN"; 1208 break; 1209 } 1210 1211 switch (vdev.vdev_stat.vs_aux) { 1212 case VDEV_AUX_NONE: 1213 aux = "-"; 1214 break; 1215 case VDEV_AUX_OPEN_FAILED: 1216 aux = "OPEN_FAILED"; 1217 break; 1218 case VDEV_AUX_CORRUPT_DATA: 1219 aux = "CORRUPT_DATA"; 1220 break; 1221 case VDEV_AUX_NO_REPLICAS: 1222 aux = "NO_REPLICAS"; 1223 break; 1224 case VDEV_AUX_BAD_GUID_SUM: 1225 aux = "BAD_GUID_SUM"; 1226 break; 1227 case VDEV_AUX_TOO_SMALL: 1228 aux = "TOO_SMALL"; 1229 break; 1230 case VDEV_AUX_BAD_LABEL: 1231 aux = "BAD_LABEL"; 1232 break; 1233 case VDEV_AUX_VERSION_NEWER: 1234 aux = "VERS_NEWER"; 1235 break; 1236 case VDEV_AUX_VERSION_OLDER: 1237 aux = "VERS_OLDER"; 1238 break; 1239 case VDEV_AUX_UNSUP_FEAT: 1240 aux = "UNSUP_FEAT"; 1241 break; 1242 case VDEV_AUX_SPARED: 1243 aux = "SPARED"; 1244 break; 1245 case VDEV_AUX_ERR_EXCEEDED: 1246 aux = "ERR_EXCEEDED"; 1247 break; 1248 case VDEV_AUX_IO_FAILURE: 1249 aux = "IO_FAILURE"; 1250 break; 1251 case VDEV_AUX_BAD_LOG: 1252 aux = "BAD_LOG"; 1253 break; 1254 case VDEV_AUX_EXTERNAL: 1255 aux = "EXTERNAL"; 1256 break; 1257 case VDEV_AUX_SPLIT_POOL: 1258 aux = "SPLIT_POOL"; 1259 break; 1260 default: 1261 aux = "UNKNOWN"; 1262 break; 1263 } 1264 1265 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1266 1267 if (stats) { 1268 vdev_stat_t *vs = &vdev.vdev_stat; 1269 int i; 1270 1271 mdb_inc_indent(4); 1272 mdb_printf("\n"); 1273 mdb_printf("%<u> %12s %12s %12s %12s " 1274 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1275 "IOCTL"); 1276 mdb_printf("OPS "); 1277 for (i = 1; i < ZIO_TYPES; i++) 1278 mdb_printf("%11#llx%s", vs->vs_ops[i], 1279 i == ZIO_TYPES - 1 ? "" : " "); 1280 mdb_printf("\n"); 1281 mdb_printf("BYTES "); 1282 for (i = 1; i < ZIO_TYPES; i++) 1283 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1284 i == ZIO_TYPES - 1 ? "" : " "); 1285 1286 1287 mdb_printf("\n"); 1288 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1289 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1290 mdb_printf("ECKSUM %10#llx\n", 1291 vs->vs_checksum_errors); 1292 mdb_dec_indent(4); 1293 } 1294 1295 if (stats) 1296 mdb_printf("\n"); 1297 } 1298 1299 children = vdev.vdev_children; 1300 1301 if (children == 0 || !recursive) 1302 return (DCMD_OK); 1303 1304 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1305 if (mdb_vread(child, children * sizeof (void *), 1306 (uintptr_t)vdev.vdev_child) == -1) { 1307 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1308 return (DCMD_ERR); 1309 } 1310 1311 for (c = 0; c < children; c++) { 1312 if (do_print_vdev(child[c], flags, depth + 2, stats, 1313 recursive)) 1314 return (DCMD_ERR); 1315 } 1316 1317 return (DCMD_OK); 1318 } 1319 1320 static int 1321 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1322 { 1323 int recursive = FALSE; 1324 int stats = FALSE; 1325 uint64_t depth = 0; 1326 1327 if (mdb_getopts(argc, argv, 1328 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1329 'e', MDB_OPT_SETBITS, TRUE, &stats, 1330 'd', MDB_OPT_UINT64, &depth, 1331 NULL) != argc) 1332 return (DCMD_USAGE); 1333 1334 if (!(flags & DCMD_ADDRSPEC)) { 1335 mdb_warn("no vdev_t address given\n"); 1336 return (DCMD_ERR); 1337 } 1338 1339 return (do_print_vdev(addr, flags, (int)depth, stats, recursive)); 1340 } 1341 1342 typedef struct metaslab_walk_data { 1343 uint64_t mw_numvdevs; 1344 uintptr_t *mw_vdevs; 1345 int mw_curvdev; 1346 uint64_t mw_nummss; 1347 uintptr_t *mw_mss; 1348 int mw_curms; 1349 } metaslab_walk_data_t; 1350 1351 static int 1352 metaslab_walk_step(mdb_walk_state_t *wsp) 1353 { 1354 metaslab_walk_data_t *mw = wsp->walk_data; 1355 metaslab_t ms; 1356 uintptr_t msp; 1357 1358 if (mw->mw_curvdev >= mw->mw_numvdevs) 1359 return (WALK_DONE); 1360 1361 if (mw->mw_mss == NULL) { 1362 uintptr_t mssp; 1363 uintptr_t vdevp; 1364 1365 ASSERT(mw->mw_curms == 0); 1366 ASSERT(mw->mw_nummss == 0); 1367 1368 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1369 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || 1370 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { 1371 return (WALK_ERR); 1372 } 1373 1374 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1375 UM_SLEEP | UM_GC); 1376 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1377 mssp) == -1) { 1378 mdb_warn("failed to read vdev_ms at %p", mssp); 1379 return (WALK_ERR); 1380 } 1381 } 1382 1383 if (mw->mw_curms >= mw->mw_nummss) { 1384 mw->mw_mss = NULL; 1385 mw->mw_curms = 0; 1386 mw->mw_nummss = 0; 1387 mw->mw_curvdev++; 1388 return (WALK_NEXT); 1389 } 1390 1391 msp = mw->mw_mss[mw->mw_curms]; 1392 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1393 mdb_warn("failed to read metaslab_t at %p", msp); 1394 return (WALK_ERR); 1395 } 1396 1397 mw->mw_curms++; 1398 1399 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1400 } 1401 1402 /* ARGSUSED */ 1403 static int 1404 metaslab_walk_init(mdb_walk_state_t *wsp) 1405 { 1406 metaslab_walk_data_t *mw; 1407 uintptr_t root_vdevp; 1408 uintptr_t childp; 1409 1410 if (wsp->walk_addr == NULL) { 1411 mdb_warn("must supply address of spa_t\n"); 1412 return (WALK_ERR); 1413 } 1414 1415 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1416 1417 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || 1418 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || 1419 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { 1420 return (DCMD_ERR); 1421 } 1422 1423 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1424 UM_SLEEP | UM_GC); 1425 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1426 childp) == -1) { 1427 mdb_warn("failed to read root vdev children at %p", childp); 1428 return (DCMD_ERR); 1429 } 1430 1431 wsp->walk_data = mw; 1432 1433 return (WALK_NEXT); 1434 } 1435 1436 typedef struct mdb_spa { 1437 uintptr_t spa_dsl_pool; 1438 uintptr_t spa_root_vdev; 1439 } mdb_spa_t; 1440 1441 typedef struct mdb_dsl_dir { 1442 uintptr_t dd_phys; 1443 int64_t dd_space_towrite[TXG_SIZE]; 1444 } mdb_dsl_dir_t; 1445 1446 typedef struct mdb_dsl_dir_phys { 1447 uint64_t dd_used_bytes; 1448 uint64_t dd_compressed_bytes; 1449 uint64_t dd_uncompressed_bytes; 1450 } mdb_dsl_dir_phys_t; 1451 1452 typedef struct mdb_vdev { 1453 uintptr_t vdev_parent; 1454 uintptr_t vdev_ms; 1455 uint64_t vdev_ms_count; 1456 vdev_stat_t vdev_stat; 1457 } mdb_vdev_t; 1458 1459 typedef struct mdb_space_map_phys_t { 1460 uint64_t smp_alloc; 1461 } mdb_space_map_phys_t; 1462 1463 typedef struct mdb_space_map { 1464 uint64_t sm_size; 1465 uint64_t sm_alloc; 1466 uintptr_t sm_phys; 1467 } mdb_space_map_t; 1468 1469 typedef struct mdb_range_tree { 1470 uint64_t rt_space; 1471 } mdb_range_tree_t; 1472 1473 typedef struct mdb_metaslab { 1474 uintptr_t ms_alloctree[TXG_SIZE]; 1475 uintptr_t ms_freetree[TXG_SIZE]; 1476 uintptr_t ms_tree; 1477 uintptr_t ms_sm; 1478 } mdb_metaslab_t; 1479 1480 typedef struct space_data { 1481 uint64_t ms_alloctree[TXG_SIZE]; 1482 uint64_t ms_freetree[TXG_SIZE]; 1483 uint64_t ms_tree; 1484 uint64_t avail; 1485 uint64_t nowavail; 1486 } space_data_t; 1487 1488 /* ARGSUSED */ 1489 static int 1490 space_cb(uintptr_t addr, const void *unknown, void *arg) 1491 { 1492 space_data_t *sd = arg; 1493 mdb_metaslab_t ms; 1494 mdb_range_tree_t rt; 1495 mdb_space_map_t sm; 1496 mdb_space_map_phys_t smp = { 0 }; 1497 int i; 1498 1499 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1500 addr, 0) == -1) 1501 return (WALK_ERR); 1502 1503 for (i = 0; i < TXG_SIZE; i++) { 1504 1505 if (mdb_ctf_vread(&rt, "range_tree_t", 1506 "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1) 1507 sd->ms_alloctree[i] += rt.rt_space; 1508 1509 if (mdb_ctf_vread(&rt, "range_tree_t", 1510 "mdb_range_tree_t", ms.ms_freetree[i], 0) == -1) 1511 sd->ms_freetree[i] += rt.rt_space; 1512 } 1513 1514 if (mdb_ctf_vread(&rt, "range_tree_t", 1515 "mdb_range_tree_t", ms.ms_tree, 0) == -1 || 1516 mdb_ctf_vread(&sm, "space_map_t", 1517 "mdb_space_map_t", ms.ms_sm, 0) == -1) 1518 return (WALK_ERR); 1519 1520 if (sm.sm_phys != NULL) { 1521 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 1522 "mdb_space_map_phys_t", sm.sm_phys, 0); 1523 } 1524 1525 sd->ms_tree += rt.rt_space; 1526 sd->avail += sm.sm_size - sm.sm_alloc; 1527 sd->nowavail += sm.sm_size - smp.smp_alloc; 1528 1529 return (WALK_NEXT); 1530 } 1531 1532 /* 1533 * ::spa_space [-b] 1534 * 1535 * Given a spa_t, print out it's on-disk space usage and in-core 1536 * estimates of future usage. If -b is given, print space in bytes. 1537 * Otherwise print in megabytes. 1538 */ 1539 /* ARGSUSED */ 1540 static int 1541 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1542 { 1543 mdb_spa_t spa; 1544 uintptr_t dp_root_dir; 1545 mdb_dsl_dir_t dd; 1546 mdb_dsl_dir_phys_t dsp; 1547 uint64_t children; 1548 uintptr_t childaddr; 1549 space_data_t sd; 1550 int shift = 20; 1551 char *suffix = "M"; 1552 int bytes = B_FALSE; 1553 1554 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != 1555 argc) 1556 return (DCMD_USAGE); 1557 if (!(flags & DCMD_ADDRSPEC)) 1558 return (DCMD_USAGE); 1559 1560 if (bytes) { 1561 shift = 0; 1562 suffix = ""; 1563 } 1564 1565 if (GETMEMB(addr, "spa", spa_dsl_pool, spa.spa_dsl_pool) || 1566 GETMEMB(addr, "spa", spa_root_vdev, spa.spa_root_vdev) || 1567 GETMEMB(spa.spa_root_vdev, "vdev", vdev_children, children) || 1568 GETMEMB(spa.spa_root_vdev, "vdev", vdev_child, childaddr) || 1569 GETMEMB(spa.spa_dsl_pool, "dsl_pool", 1570 dp_root_dir, dp_root_dir) || 1571 GETMEMB(dp_root_dir, "dsl_dir", dd_phys, dd.dd_phys) || 1572 GETMEMB(dp_root_dir, "dsl_dir", 1573 dd_space_towrite, dd.dd_space_towrite) || 1574 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1575 dd_used_bytes, dsp.dd_used_bytes) || 1576 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1577 dd_compressed_bytes, dsp.dd_compressed_bytes) || 1578 GETMEMB(dd.dd_phys, "dsl_dir_phys", 1579 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) { 1580 return (DCMD_ERR); 1581 } 1582 1583 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1584 dd.dd_space_towrite[0] >> shift, suffix, 1585 dd.dd_space_towrite[1] >> shift, suffix, 1586 dd.dd_space_towrite[2] >> shift, suffix, 1587 dd.dd_space_towrite[3] >> shift, suffix); 1588 1589 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1590 dsp.dd_used_bytes >> shift, suffix); 1591 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1592 dsp.dd_compressed_bytes >> shift, suffix); 1593 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1594 dsp.dd_uncompressed_bytes >> shift, suffix); 1595 1596 bzero(&sd, sizeof (sd)); 1597 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1598 mdb_warn("can't walk metaslabs"); 1599 return (DCMD_ERR); 1600 } 1601 1602 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1603 sd.ms_alloctree[0] >> shift, suffix, 1604 sd.ms_alloctree[1] >> shift, suffix, 1605 sd.ms_alloctree[2] >> shift, suffix, 1606 sd.ms_alloctree[3] >> shift, suffix); 1607 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1608 sd.ms_freetree[0] >> shift, suffix, 1609 sd.ms_freetree[1] >> shift, suffix, 1610 sd.ms_freetree[2] >> shift, suffix, 1611 sd.ms_freetree[3] >> shift, suffix); 1612 mdb_printf("ms_tree = %llu%s\n", sd.ms_tree >> shift, suffix); 1613 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1614 mdb_printf("current syncing avail = %llu%s\n", 1615 sd.nowavail >> shift, suffix); 1616 1617 return (DCMD_OK); 1618 } 1619 1620 typedef struct mdb_spa_aux_vdev { 1621 int sav_count; 1622 uintptr_t sav_vdevs; 1623 } mdb_spa_aux_vdev_t; 1624 1625 typedef struct mdb_spa_vdevs { 1626 uintptr_t spa_root_vdev; 1627 mdb_spa_aux_vdev_t spa_l2cache; 1628 mdb_spa_aux_vdev_t spa_spares; 1629 } mdb_spa_vdevs_t; 1630 1631 static int 1632 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 1633 const char *name) 1634 { 1635 uintptr_t *aux; 1636 size_t len; 1637 int ret, i; 1638 1639 /* 1640 * Iterate over aux vdevs and print those out as well. This is a 1641 * little annoying because we don't have a root vdev to pass to ::vdev. 1642 * Instead, we print a single line and then call it for each child 1643 * vdev. 1644 */ 1645 if (sav->sav_count != 0) { 1646 v[1].a_type = MDB_TYPE_STRING; 1647 v[1].a_un.a_str = "-d"; 1648 v[2].a_type = MDB_TYPE_IMMEDIATE; 1649 v[2].a_un.a_val = 2; 1650 1651 len = sav->sav_count * sizeof (uintptr_t); 1652 aux = mdb_alloc(len, UM_SLEEP); 1653 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) { 1654 mdb_free(aux, len); 1655 mdb_warn("failed to read l2cache vdevs at %p", 1656 sav->sav_vdevs); 1657 return (DCMD_ERR); 1658 } 1659 1660 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 1661 1662 for (i = 0; i < sav->sav_count; i++) { 1663 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 1664 if (ret != DCMD_OK) { 1665 mdb_free(aux, len); 1666 return (ret); 1667 } 1668 } 1669 1670 mdb_free(aux, len); 1671 } 1672 1673 return (0); 1674 } 1675 1676 /* 1677 * ::spa_vdevs 1678 * 1679 * -e Include error stats 1680 * 1681 * Print out a summarized list of vdevs for the given spa_t. 1682 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 1683 * iterating over the cache devices. 1684 */ 1685 /* ARGSUSED */ 1686 static int 1687 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1688 { 1689 mdb_arg_t v[3]; 1690 int errors = FALSE; 1691 int ret; 1692 1693 if (mdb_getopts(argc, argv, 1694 'e', MDB_OPT_SETBITS, TRUE, &errors, 1695 NULL) != argc) 1696 return (DCMD_USAGE); 1697 1698 if (!(flags & DCMD_ADDRSPEC)) 1699 return (DCMD_USAGE); 1700 1701 mdb_spa_vdevs_t spa; 1702 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1) 1703 return (DCMD_ERR); 1704 1705 /* 1706 * Unitialized spa_t structures can have a NULL root vdev. 1707 */ 1708 if (spa.spa_root_vdev == NULL) { 1709 mdb_printf("no associated vdevs\n"); 1710 return (DCMD_OK); 1711 } 1712 1713 v[0].a_type = MDB_TYPE_STRING; 1714 v[0].a_un.a_str = errors ? "-re" : "-r"; 1715 1716 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1717 flags, 1, v); 1718 if (ret != DCMD_OK) 1719 return (ret); 1720 1721 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 1722 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 1723 return (DCMD_ERR); 1724 1725 return (DCMD_OK); 1726 } 1727 1728 /* 1729 * ::zio 1730 * 1731 * Print a summary of zio_t and all its children. This is intended to display a 1732 * zio tree, and hence we only pick the most important pieces of information for 1733 * the main summary. More detailed information can always be found by doing a 1734 * '::print zio' on the underlying zio_t. The columns we display are: 1735 * 1736 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED 1737 * 1738 * The 'address' column is indented by one space for each depth level as we 1739 * descend down the tree. 1740 */ 1741 1742 #define ZIO_MAXINDENT 7 1743 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 1744 #define ZIO_WALK_SELF 0 1745 #define ZIO_WALK_CHILD 1 1746 #define ZIO_WALK_PARENT 2 1747 1748 typedef struct zio_print_args { 1749 int zpa_current_depth; 1750 int zpa_min_depth; 1751 int zpa_max_depth; 1752 int zpa_type; 1753 uint_t zpa_flags; 1754 } zio_print_args_t; 1755 1756 typedef struct mdb_zio { 1757 enum zio_type io_type; 1758 enum zio_stage io_stage; 1759 uintptr_t io_waiter; 1760 uintptr_t io_spa; 1761 struct { 1762 struct { 1763 uintptr_t list_next; 1764 } list_head; 1765 } io_parent_list; 1766 int io_error; 1767 } mdb_zio_t; 1768 1769 typedef struct mdb_zio_timestamp { 1770 hrtime_t io_timestamp; 1771 } mdb_zio_timestamp_t; 1772 1773 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 1774 1775 static int 1776 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) 1777 { 1778 mdb_ctf_id_t type_enum, stage_enum; 1779 int indent = zpa->zpa_current_depth; 1780 const char *type, *stage; 1781 uintptr_t laddr; 1782 mdb_zio_t zio; 1783 mdb_zio_timestamp_t zio_timestamp = { 0 }; 1784 1785 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) 1786 return (WALK_ERR); 1787 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", 1788 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); 1789 1790 if (indent > ZIO_MAXINDENT) 1791 indent = ZIO_MAXINDENT; 1792 1793 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 1794 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 1795 mdb_warn("failed to lookup zio enums"); 1796 return (WALK_ERR); 1797 } 1798 1799 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) 1800 type += sizeof ("ZIO_TYPE_") - 1; 1801 else 1802 type = "?"; 1803 1804 if (zio.io_error == 0) { 1805 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); 1806 if (stage != NULL) 1807 stage += sizeof ("ZIO_STAGE_") - 1; 1808 else 1809 stage = "?"; 1810 } else { 1811 stage = "FAILED"; 1812 } 1813 1814 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 1815 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 1816 mdb_printf("%?p\n", addr); 1817 } else { 1818 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 1819 ZIO_MAXWIDTH - indent, addr, type, stage); 1820 if (zio.io_waiter != 0) 1821 mdb_printf("%-16lx ", zio.io_waiter); 1822 else 1823 mdb_printf("%-16s ", "-"); 1824 #ifdef _KERNEL 1825 if (zio_timestamp.io_timestamp != 0) { 1826 mdb_printf("%llums", (mdb_gethrtime() - 1827 zio_timestamp.io_timestamp) / 1828 1000000); 1829 } else { 1830 mdb_printf("%-12s ", "-"); 1831 } 1832 #else 1833 mdb_printf("%-12s ", "-"); 1834 #endif 1835 mdb_printf("\n"); 1836 } 1837 } 1838 1839 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 1840 return (WALK_NEXT); 1841 1842 if (zpa->zpa_type == ZIO_WALK_PARENT) 1843 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 1844 "io_parent_list"); 1845 else 1846 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 1847 "io_child_list"); 1848 1849 zpa->zpa_current_depth++; 1850 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 1851 mdb_warn("failed to walk zio_t children at %p\n", laddr); 1852 return (WALK_ERR); 1853 } 1854 zpa->zpa_current_depth--; 1855 1856 return (WALK_NEXT); 1857 } 1858 1859 /* ARGSUSED */ 1860 static int 1861 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 1862 { 1863 zio_link_t zl; 1864 uintptr_t ziop; 1865 zio_print_args_t *zpa = arg; 1866 1867 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 1868 mdb_warn("failed to read zio_link_t at %p", addr); 1869 return (WALK_ERR); 1870 } 1871 1872 if (zpa->zpa_type == ZIO_WALK_PARENT) 1873 ziop = (uintptr_t)zl.zl_parent; 1874 else 1875 ziop = (uintptr_t)zl.zl_child; 1876 1877 return (zio_print_cb(ziop, zpa)); 1878 } 1879 1880 /* ARGSUSED */ 1881 static int 1882 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1883 { 1884 zio_print_args_t zpa = { 0 }; 1885 1886 if (!(flags & DCMD_ADDRSPEC)) 1887 return (DCMD_USAGE); 1888 1889 if (mdb_getopts(argc, argv, 1890 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 1891 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 1892 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, 1893 NULL) != argc) 1894 return (DCMD_USAGE); 1895 1896 zpa.zpa_flags = flags; 1897 if (zpa.zpa_max_depth != 0) { 1898 if (zpa.zpa_type == ZIO_WALK_SELF) 1899 zpa.zpa_type = ZIO_WALK_CHILD; 1900 } else if (zpa.zpa_type != ZIO_WALK_SELF) { 1901 zpa.zpa_min_depth = 1; 1902 zpa.zpa_max_depth = 1; 1903 } 1904 1905 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 1906 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n", 1907 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", 1908 "TIME_ELAPSED"); 1909 } 1910 1911 if (zio_print_cb(addr, &zpa) != WALK_NEXT) 1912 return (DCMD_ERR); 1913 1914 return (DCMD_OK); 1915 } 1916 1917 /* 1918 * [addr]::zio_state 1919 * 1920 * Print a summary of all zio_t structures on the system, or for a particular 1921 * pool. This is equivalent to '::walk zio_root | ::zio'. 1922 */ 1923 /*ARGSUSED*/ 1924 static int 1925 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1926 { 1927 /* 1928 * MDB will remember the last address of the pipeline, so if we don't 1929 * zero this we'll end up trying to walk zio structures for a 1930 * non-existent spa_t. 1931 */ 1932 if (!(flags & DCMD_ADDRSPEC)) 1933 addr = 0; 1934 1935 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 1936 } 1937 1938 typedef struct txg_list_walk_data { 1939 uintptr_t lw_head[TXG_SIZE]; 1940 int lw_txgoff; 1941 int lw_maxoff; 1942 size_t lw_offset; 1943 void *lw_obj; 1944 } txg_list_walk_data_t; 1945 1946 static int 1947 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 1948 { 1949 txg_list_walk_data_t *lwd; 1950 txg_list_t list; 1951 int i; 1952 1953 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 1954 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 1955 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 1956 return (WALK_ERR); 1957 } 1958 1959 for (i = 0; i < TXG_SIZE; i++) 1960 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 1961 lwd->lw_offset = list.tl_offset; 1962 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 1963 UM_SLEEP | UM_GC); 1964 lwd->lw_txgoff = txg; 1965 lwd->lw_maxoff = maxoff; 1966 1967 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 1968 wsp->walk_data = lwd; 1969 1970 return (WALK_NEXT); 1971 } 1972 1973 static int 1974 txg_list_walk_init(mdb_walk_state_t *wsp) 1975 { 1976 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 1977 } 1978 1979 static int 1980 txg_list0_walk_init(mdb_walk_state_t *wsp) 1981 { 1982 return (txg_list_walk_init_common(wsp, 0, 0)); 1983 } 1984 1985 static int 1986 txg_list1_walk_init(mdb_walk_state_t *wsp) 1987 { 1988 return (txg_list_walk_init_common(wsp, 1, 1)); 1989 } 1990 1991 static int 1992 txg_list2_walk_init(mdb_walk_state_t *wsp) 1993 { 1994 return (txg_list_walk_init_common(wsp, 2, 2)); 1995 } 1996 1997 static int 1998 txg_list3_walk_init(mdb_walk_state_t *wsp) 1999 { 2000 return (txg_list_walk_init_common(wsp, 3, 3)); 2001 } 2002 2003 static int 2004 txg_list_walk_step(mdb_walk_state_t *wsp) 2005 { 2006 txg_list_walk_data_t *lwd = wsp->walk_data; 2007 uintptr_t addr; 2008 txg_node_t *node; 2009 int status; 2010 2011 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 2012 lwd->lw_txgoff++; 2013 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2014 } 2015 2016 if (wsp->walk_addr == NULL) 2017 return (WALK_DONE); 2018 2019 addr = wsp->walk_addr - lwd->lw_offset; 2020 2021 if (mdb_vread(lwd->lw_obj, 2022 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 2023 mdb_warn("failed to read list element at %#lx", addr); 2024 return (WALK_ERR); 2025 } 2026 2027 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 2028 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 2029 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 2030 2031 return (status); 2032 } 2033 2034 /* 2035 * ::walk spa 2036 * 2037 * Walk all named spa_t structures in the namespace. This is nothing more than 2038 * a layered avl walk. 2039 */ 2040 static int 2041 spa_walk_init(mdb_walk_state_t *wsp) 2042 { 2043 GElf_Sym sym; 2044 2045 if (wsp->walk_addr != NULL) { 2046 mdb_warn("spa walk only supports global walks\n"); 2047 return (WALK_ERR); 2048 } 2049 2050 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 2051 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 2052 return (WALK_ERR); 2053 } 2054 2055 wsp->walk_addr = (uintptr_t)sym.st_value; 2056 2057 if (mdb_layered_walk("avl", wsp) == -1) { 2058 mdb_warn("failed to walk 'avl'\n"); 2059 return (WALK_ERR); 2060 } 2061 2062 return (WALK_NEXT); 2063 } 2064 2065 static int 2066 spa_walk_step(mdb_walk_state_t *wsp) 2067 { 2068 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata)); 2069 } 2070 2071 /* 2072 * [addr]::walk zio 2073 * 2074 * Walk all active zio_t structures on the system. This is simply a layered 2075 * walk on top of ::walk zio_cache, with the optional ability to limit the 2076 * structures to a particular pool. 2077 */ 2078 static int 2079 zio_walk_init(mdb_walk_state_t *wsp) 2080 { 2081 wsp->walk_data = (void *)wsp->walk_addr; 2082 2083 if (mdb_layered_walk("zio_cache", wsp) == -1) { 2084 mdb_warn("failed to walk 'zio_cache'\n"); 2085 return (WALK_ERR); 2086 } 2087 2088 return (WALK_NEXT); 2089 } 2090 2091 static int 2092 zio_walk_step(mdb_walk_state_t *wsp) 2093 { 2094 mdb_zio_t zio; 2095 uintptr_t spa = (uintptr_t)wsp->walk_data; 2096 2097 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2098 wsp->walk_addr, 0) == -1) 2099 return (WALK_ERR); 2100 2101 if (spa != 0 && spa != zio.io_spa) 2102 return (WALK_NEXT); 2103 2104 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2105 } 2106 2107 /* 2108 * [addr]::walk zio_root 2109 * 2110 * Walk only root zio_t structures, optionally for a particular spa_t. 2111 */ 2112 static int 2113 zio_walk_root_step(mdb_walk_state_t *wsp) 2114 { 2115 mdb_zio_t zio; 2116 uintptr_t spa = (uintptr_t)wsp->walk_data; 2117 2118 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2119 wsp->walk_addr, 0) == -1) 2120 return (WALK_ERR); 2121 2122 if (spa != 0 && spa != zio.io_spa) 2123 return (WALK_NEXT); 2124 2125 /* If the parent list is not empty, ignore */ 2126 if (zio.io_parent_list.list_head.list_next != 2127 wsp->walk_addr + 2128 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + 2129 mdb_ctf_offsetof_by_name("struct list", "list_head")) 2130 return (WALK_NEXT); 2131 2132 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2133 } 2134 2135 #define NICENUM_BUFLEN 6 2136 2137 static int 2138 snprintfrac(char *buf, int len, 2139 uint64_t numerator, uint64_t denom, int frac_digits) 2140 { 2141 int mul = 1; 2142 int whole, frac, i; 2143 2144 for (i = frac_digits; i; i--) 2145 mul *= 10; 2146 whole = numerator / denom; 2147 frac = mul * numerator / denom - mul * whole; 2148 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); 2149 } 2150 2151 static void 2152 mdb_nicenum(uint64_t num, char *buf) 2153 { 2154 uint64_t n = num; 2155 int index = 0; 2156 char *u; 2157 2158 while (n >= 1024) { 2159 n = (n + (1024 / 2)) / 1024; /* Round up or down */ 2160 index++; 2161 } 2162 2163 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; 2164 2165 if (index == 0) { 2166 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", 2167 (u_longlong_t)n); 2168 } else if (n < 10 && (num & (num - 1)) != 0) { 2169 (void) snprintfrac(buf, NICENUM_BUFLEN, 2170 num, 1ULL << 10 * index, 2); 2171 strcat(buf, u); 2172 } else if (n < 100 && (num & (num - 1)) != 0) { 2173 (void) snprintfrac(buf, NICENUM_BUFLEN, 2174 num, 1ULL << 10 * index, 1); 2175 strcat(buf, u); 2176 } else { 2177 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", 2178 (u_longlong_t)n, u); 2179 } 2180 } 2181 2182 /* 2183 * ::zfs_blkstats 2184 * 2185 * -v print verbose per-level information 2186 * 2187 */ 2188 static int 2189 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2190 { 2191 boolean_t verbose = B_FALSE; 2192 zfs_all_blkstats_t stats; 2193 dmu_object_type_t t; 2194 zfs_blkstat_t *tzb; 2195 uint64_t ditto; 2196 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; 2197 /* +10 in case it grew */ 2198 2199 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { 2200 mdb_warn("failed to read 'dmu_ot'"); 2201 return (DCMD_ERR); 2202 } 2203 2204 if (mdb_getopts(argc, argv, 2205 'v', MDB_OPT_SETBITS, TRUE, &verbose, 2206 NULL) != argc) 2207 return (DCMD_USAGE); 2208 2209 if (!(flags & DCMD_ADDRSPEC)) 2210 return (DCMD_USAGE); 2211 2212 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || 2213 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || 2214 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 2215 mdb_warn("failed to read data at %p;", addr); 2216 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 2217 return (DCMD_ERR); 2218 } 2219 2220 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 2221 if (tzb->zb_gangs != 0) { 2222 mdb_printf("Ganged blocks: %llu\n", 2223 (longlong_t)tzb->zb_gangs); 2224 } 2225 2226 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 2227 tzb->zb_ditto_3_of_3_samevdev; 2228 if (ditto != 0) { 2229 mdb_printf("Dittoed blocks on same vdev: %llu\n", 2230 (longlong_t)ditto); 2231 } 2232 2233 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 2234 "\t avg\t comp\t%%Total\tType\n"); 2235 2236 for (t = 0; t <= DMU_OT_TOTAL; t++) { 2237 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; 2238 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; 2239 char avg[NICENUM_BUFLEN]; 2240 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; 2241 char typename[64]; 2242 int l; 2243 2244 2245 if (t == DMU_OT_DEFERRED) 2246 strcpy(typename, "deferred free"); 2247 else if (t == DMU_OT_OTHER) 2248 strcpy(typename, "other"); 2249 else if (t == DMU_OT_TOTAL) 2250 strcpy(typename, "Total"); 2251 else if (mdb_readstr(typename, sizeof (typename), 2252 (uintptr_t)dmu_ot[t].ot_name) == -1) { 2253 mdb_warn("failed to read type name"); 2254 return (DCMD_ERR); 2255 } 2256 2257 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 2258 continue; 2259 2260 for (l = -1; l < DN_MAX_LEVELS; l++) { 2261 int level = (l == -1 ? DN_MAX_LEVELS : l); 2262 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 2263 2264 if (zb->zb_asize == 0) 2265 continue; 2266 2267 /* 2268 * Don't print each level unless requested. 2269 */ 2270 if (!verbose && level != DN_MAX_LEVELS) 2271 continue; 2272 2273 /* 2274 * If all the space is level 0, don't print the 2275 * level 0 separately. 2276 */ 2277 if (level == 0 && zb->zb_asize == 2278 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 2279 continue; 2280 2281 mdb_nicenum(zb->zb_count, csize); 2282 mdb_nicenum(zb->zb_lsize, lsize); 2283 mdb_nicenum(zb->zb_psize, psize); 2284 mdb_nicenum(zb->zb_asize, asize); 2285 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 2286 (void) snprintfrac(comp, NICENUM_BUFLEN, 2287 zb->zb_lsize, zb->zb_psize, 2); 2288 (void) snprintfrac(pct, NICENUM_BUFLEN, 2289 100 * zb->zb_asize, tzb->zb_asize, 2); 2290 2291 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 2292 "\t%5s\t%6s\t", 2293 csize, lsize, psize, asize, avg, comp, pct); 2294 2295 if (level == DN_MAX_LEVELS) 2296 mdb_printf("%s\n", typename); 2297 else 2298 mdb_printf(" L%d %s\n", 2299 level, typename); 2300 } 2301 } 2302 2303 return (DCMD_OK); 2304 } 2305 2306 typedef struct mdb_reference { 2307 uintptr_t ref_holder; 2308 uintptr_t ref_removed; 2309 uint64_t ref_number; 2310 } mdb_reference_t; 2311 2312 /* ARGSUSED */ 2313 static int 2314 reference_cb(uintptr_t addr, const void *ignored, void *arg) 2315 { 2316 mdb_reference_t ref; 2317 boolean_t holder_is_str = B_FALSE; 2318 char holder_str[128]; 2319 boolean_t removed = (boolean_t)arg; 2320 2321 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr, 2322 0) == -1) 2323 return (DCMD_ERR); 2324 2325 if (mdb_readstr(holder_str, sizeof (holder_str), 2326 ref.ref_holder) != -1) 2327 holder_is_str = strisprint(holder_str); 2328 2329 if (removed) 2330 mdb_printf("removed "); 2331 mdb_printf("reference "); 2332 if (ref.ref_number != 1) 2333 mdb_printf("with count=%llu ", ref.ref_number); 2334 mdb_printf("with tag %lx", ref.ref_holder); 2335 if (holder_is_str) 2336 mdb_printf(" \"%s\"", holder_str); 2337 mdb_printf(", held at:\n"); 2338 2339 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 2340 2341 if (removed) { 2342 mdb_printf("removed at:\n"); 2343 (void) mdb_call_dcmd("whatis", ref.ref_removed, 2344 DCMD_ADDRSPEC, 0, NULL); 2345 } 2346 2347 mdb_printf("\n"); 2348 2349 return (WALK_NEXT); 2350 } 2351 2352 typedef struct mdb_refcount { 2353 uint64_t rc_count; 2354 } mdb_refcount_t; 2355 2356 typedef struct mdb_refcount_removed { 2357 uint64_t rc_removed_count; 2358 } mdb_refcount_removed_t; 2359 2360 typedef struct mdb_refcount_tracked { 2361 boolean_t rc_tracked; 2362 } mdb_refcount_tracked_t; 2363 2364 /* ARGSUSED */ 2365 static int 2366 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2367 { 2368 mdb_refcount_t rc; 2369 mdb_refcount_removed_t rcr; 2370 mdb_refcount_tracked_t rct; 2371 int off; 2372 boolean_t released = B_FALSE; 2373 2374 if (!(flags & DCMD_ADDRSPEC)) 2375 return (DCMD_USAGE); 2376 2377 if (mdb_getopts(argc, argv, 2378 'r', MDB_OPT_SETBITS, B_TRUE, &released, 2379 NULL) != argc) 2380 return (DCMD_USAGE); 2381 2382 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr, 2383 0) == -1) 2384 return (DCMD_ERR); 2385 2386 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr, 2387 MDB_CTF_VREAD_QUIET) == -1) { 2388 mdb_printf("refcount_t at %p has %llu holds (untracked)\n", 2389 addr, (longlong_t)rc.rc_count); 2390 return (DCMD_OK); 2391 } 2392 2393 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr, 2394 MDB_CTF_VREAD_QUIET) == -1) { 2395 /* If this is an old target, it might be tracked. */ 2396 rct.rc_tracked = B_TRUE; 2397 } 2398 2399 mdb_printf("refcount_t at %p has %llu current holds, " 2400 "%llu recently released holds\n", 2401 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count); 2402 2403 if (rct.rc_tracked && rc.rc_count > 0) 2404 mdb_printf("current holds:\n"); 2405 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list"); 2406 if (off == -1) 2407 return (DCMD_ERR); 2408 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 2409 2410 if (released && rcr.rc_removed_count > 0) { 2411 mdb_printf("released holds:\n"); 2412 2413 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed"); 2414 if (off == -1) 2415 return (DCMD_ERR); 2416 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 2417 } 2418 2419 return (DCMD_OK); 2420 } 2421 2422 /* ARGSUSED */ 2423 static int 2424 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2425 { 2426 sa_attr_table_t *table; 2427 sa_os_t sa_os; 2428 char *name; 2429 int i; 2430 2431 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 2432 mdb_warn("failed to read sa_os at %p", addr); 2433 return (DCMD_ERR); 2434 } 2435 2436 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2437 UM_SLEEP | UM_GC); 2438 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 2439 2440 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2441 (uintptr_t)sa_os.sa_attr_table) == -1) { 2442 mdb_warn("failed to read sa_os at %p", addr); 2443 return (DCMD_ERR); 2444 } 2445 2446 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 2447 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 2448 for (i = 0; i != sa_os.sa_num_attrs; i++) { 2449 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 2450 mdb_printf("%5x %8x %8x %8x %-s\n", 2451 (int)table[i].sa_attr, (int)table[i].sa_registered, 2452 (int)table[i].sa_length, table[i].sa_byteswap, name); 2453 } 2454 2455 return (DCMD_OK); 2456 } 2457 2458 static int 2459 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 2460 { 2461 uintptr_t idx_table; 2462 2463 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { 2464 mdb_printf("can't find offset table in sa_idx_tab\n"); 2465 return (-1); 2466 } 2467 2468 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 2469 UM_SLEEP | UM_GC); 2470 2471 if (mdb_vread(*off_tab, 2472 attr_count * sizeof (uint32_t), idx_table) == -1) { 2473 mdb_warn("failed to attribute offset table %p", idx_table); 2474 return (-1); 2475 } 2476 2477 return (DCMD_OK); 2478 } 2479 2480 /*ARGSUSED*/ 2481 static int 2482 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2483 { 2484 uint32_t *offset_tab; 2485 int attr_count; 2486 uint64_t attr_id; 2487 uintptr_t attr_addr; 2488 uintptr_t bonus_tab, spill_tab; 2489 uintptr_t db_bonus, db_spill; 2490 uintptr_t os, os_sa; 2491 uintptr_t db_data; 2492 2493 if (argc != 1) 2494 return (DCMD_USAGE); 2495 2496 if (argv[0].a_type == MDB_TYPE_STRING) 2497 attr_id = mdb_strtoull(argv[0].a_un.a_str); 2498 else 2499 return (DCMD_USAGE); 2500 2501 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || 2502 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || 2503 GETMEMB(addr, "sa_handle", sa_os, os) || 2504 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || 2505 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { 2506 mdb_printf("Can't find necessary information in sa_handle " 2507 "in sa_handle\n"); 2508 return (DCMD_ERR); 2509 } 2510 2511 if (GETMEMB(os, "objset", os_sa, os_sa)) { 2512 mdb_printf("Can't find os_sa in objset\n"); 2513 return (DCMD_ERR); 2514 } 2515 2516 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { 2517 mdb_printf("Can't find sa_num_attrs\n"); 2518 return (DCMD_ERR); 2519 } 2520 2521 if (attr_id > attr_count) { 2522 mdb_printf("attribute id number is out of range\n"); 2523 return (DCMD_ERR); 2524 } 2525 2526 if (bonus_tab) { 2527 if (sa_get_off_table(bonus_tab, &offset_tab, 2528 attr_count) == -1) { 2529 return (DCMD_ERR); 2530 } 2531 2532 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { 2533 mdb_printf("can't find db_data in bonus dbuf\n"); 2534 return (DCMD_ERR); 2535 } 2536 } 2537 2538 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 2539 spill_tab == NULL) { 2540 mdb_printf("Attribute does not exist\n"); 2541 return (DCMD_ERR); 2542 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 2543 if (sa_get_off_table(spill_tab, &offset_tab, 2544 attr_count) == -1) { 2545 return (DCMD_ERR); 2546 } 2547 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { 2548 mdb_printf("can't find db_data in spill dbuf\n"); 2549 return (DCMD_ERR); 2550 } 2551 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 2552 mdb_printf("Attribute does not exist\n"); 2553 return (DCMD_ERR); 2554 } 2555 } 2556 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 2557 mdb_printf("%p\n", attr_addr); 2558 return (DCMD_OK); 2559 } 2560 2561 /* ARGSUSED */ 2562 static int 2563 zfs_ace_print_common(uintptr_t addr, uint_t flags, 2564 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 2565 uint16_t ace_type, int verbose) 2566 { 2567 if (DCMD_HDRSPEC(flags) && !verbose) 2568 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 2569 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 2570 2571 if (!verbose) { 2572 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 2573 ace_flags, access_mask, ace_type, id); 2574 return (DCMD_OK); 2575 } 2576 2577 switch (ace_flags & ACE_TYPE_FLAGS) { 2578 case ACE_OWNER: 2579 mdb_printf("owner@:"); 2580 break; 2581 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2582 mdb_printf("group@:"); 2583 break; 2584 case ACE_EVERYONE: 2585 mdb_printf("everyone@:"); 2586 break; 2587 case ACE_IDENTIFIER_GROUP: 2588 mdb_printf("group:%llx:", (u_longlong_t)id); 2589 break; 2590 case 0: /* User entry */ 2591 mdb_printf("user:%llx:", (u_longlong_t)id); 2592 break; 2593 } 2594 2595 /* print out permission mask */ 2596 if (access_mask & ACE_READ_DATA) 2597 mdb_printf("r"); 2598 else 2599 mdb_printf("-"); 2600 if (access_mask & ACE_WRITE_DATA) 2601 mdb_printf("w"); 2602 else 2603 mdb_printf("-"); 2604 if (access_mask & ACE_EXECUTE) 2605 mdb_printf("x"); 2606 else 2607 mdb_printf("-"); 2608 if (access_mask & ACE_APPEND_DATA) 2609 mdb_printf("p"); 2610 else 2611 mdb_printf("-"); 2612 if (access_mask & ACE_DELETE) 2613 mdb_printf("d"); 2614 else 2615 mdb_printf("-"); 2616 if (access_mask & ACE_DELETE_CHILD) 2617 mdb_printf("D"); 2618 else 2619 mdb_printf("-"); 2620 if (access_mask & ACE_READ_ATTRIBUTES) 2621 mdb_printf("a"); 2622 else 2623 mdb_printf("-"); 2624 if (access_mask & ACE_WRITE_ATTRIBUTES) 2625 mdb_printf("A"); 2626 else 2627 mdb_printf("-"); 2628 if (access_mask & ACE_READ_NAMED_ATTRS) 2629 mdb_printf("R"); 2630 else 2631 mdb_printf("-"); 2632 if (access_mask & ACE_WRITE_NAMED_ATTRS) 2633 mdb_printf("W"); 2634 else 2635 mdb_printf("-"); 2636 if (access_mask & ACE_READ_ACL) 2637 mdb_printf("c"); 2638 else 2639 mdb_printf("-"); 2640 if (access_mask & ACE_WRITE_ACL) 2641 mdb_printf("C"); 2642 else 2643 mdb_printf("-"); 2644 if (access_mask & ACE_WRITE_OWNER) 2645 mdb_printf("o"); 2646 else 2647 mdb_printf("-"); 2648 if (access_mask & ACE_SYNCHRONIZE) 2649 mdb_printf("s"); 2650 else 2651 mdb_printf("-"); 2652 2653 mdb_printf(":"); 2654 2655 /* Print out inheritance flags */ 2656 if (ace_flags & ACE_FILE_INHERIT_ACE) 2657 mdb_printf("f"); 2658 else 2659 mdb_printf("-"); 2660 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 2661 mdb_printf("d"); 2662 else 2663 mdb_printf("-"); 2664 if (ace_flags & ACE_INHERIT_ONLY_ACE) 2665 mdb_printf("i"); 2666 else 2667 mdb_printf("-"); 2668 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 2669 mdb_printf("n"); 2670 else 2671 mdb_printf("-"); 2672 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 2673 mdb_printf("S"); 2674 else 2675 mdb_printf("-"); 2676 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 2677 mdb_printf("F"); 2678 else 2679 mdb_printf("-"); 2680 if (ace_flags & ACE_INHERITED_ACE) 2681 mdb_printf("I"); 2682 else 2683 mdb_printf("-"); 2684 2685 switch (ace_type) { 2686 case ACE_ACCESS_ALLOWED_ACE_TYPE: 2687 mdb_printf(":allow\n"); 2688 break; 2689 case ACE_ACCESS_DENIED_ACE_TYPE: 2690 mdb_printf(":deny\n"); 2691 break; 2692 case ACE_SYSTEM_AUDIT_ACE_TYPE: 2693 mdb_printf(":audit\n"); 2694 break; 2695 case ACE_SYSTEM_ALARM_ACE_TYPE: 2696 mdb_printf(":alarm\n"); 2697 break; 2698 default: 2699 mdb_printf(":?\n"); 2700 } 2701 return (DCMD_OK); 2702 } 2703 2704 /* ARGSUSED */ 2705 static int 2706 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2707 { 2708 zfs_ace_t zace; 2709 int verbose = FALSE; 2710 uint64_t id; 2711 2712 if (!(flags & DCMD_ADDRSPEC)) 2713 return (DCMD_USAGE); 2714 2715 if (mdb_getopts(argc, argv, 2716 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2717 return (DCMD_USAGE); 2718 2719 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 2720 mdb_warn("failed to read zfs_ace_t"); 2721 return (DCMD_ERR); 2722 } 2723 2724 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 2725 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2726 id = zace.z_fuid; 2727 else 2728 id = -1; 2729 2730 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 2731 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 2732 } 2733 2734 /* ARGSUSED */ 2735 static int 2736 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2737 { 2738 ace_t ace; 2739 uint64_t id; 2740 int verbose = FALSE; 2741 2742 if (!(flags & DCMD_ADDRSPEC)) 2743 return (DCMD_USAGE); 2744 2745 if (mdb_getopts(argc, argv, 2746 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2747 return (DCMD_USAGE); 2748 2749 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 2750 mdb_warn("failed to read ace_t"); 2751 return (DCMD_ERR); 2752 } 2753 2754 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 2755 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2756 id = ace.a_who; 2757 else 2758 id = -1; 2759 2760 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 2761 ace.a_flags, ace.a_type, verbose)); 2762 } 2763 2764 typedef struct acl_dump_args { 2765 int a_argc; 2766 const mdb_arg_t *a_argv; 2767 uint16_t a_version; 2768 int a_flags; 2769 } acl_dump_args_t; 2770 2771 /* ARGSUSED */ 2772 static int 2773 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 2774 { 2775 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2776 2777 if (acl_args->a_version == 1) { 2778 if (mdb_call_dcmd("zfs_ace", addr, 2779 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2780 acl_args->a_argv) != DCMD_OK) { 2781 return (WALK_ERR); 2782 } 2783 } else { 2784 if (mdb_call_dcmd("zfs_ace0", addr, 2785 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2786 acl_args->a_argv) != DCMD_OK) { 2787 return (WALK_ERR); 2788 } 2789 } 2790 acl_args->a_flags = DCMD_LOOP; 2791 return (WALK_NEXT); 2792 } 2793 2794 /* ARGSUSED */ 2795 static int 2796 acl_cb(uintptr_t addr, const void *unknown, void *arg) 2797 { 2798 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2799 2800 if (acl_args->a_version == 1) { 2801 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 2802 arg, addr) != 0) { 2803 mdb_warn("can't walk ACEs"); 2804 return (DCMD_ERR); 2805 } 2806 } else { 2807 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 2808 arg, addr) != 0) { 2809 mdb_warn("can't walk ACEs"); 2810 return (DCMD_ERR); 2811 } 2812 } 2813 return (WALK_NEXT); 2814 } 2815 2816 /* ARGSUSED */ 2817 static int 2818 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2819 { 2820 zfs_acl_t zacl; 2821 int verbose = FALSE; 2822 acl_dump_args_t acl_args; 2823 2824 if (!(flags & DCMD_ADDRSPEC)) 2825 return (DCMD_USAGE); 2826 2827 if (mdb_getopts(argc, argv, 2828 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2829 return (DCMD_USAGE); 2830 2831 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 2832 mdb_warn("failed to read zfs_acl_t"); 2833 return (DCMD_ERR); 2834 } 2835 2836 acl_args.a_argc = argc; 2837 acl_args.a_argv = argv; 2838 acl_args.a_version = zacl.z_version; 2839 acl_args.a_flags = DCMD_LOOPFIRST; 2840 2841 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 2842 mdb_warn("can't walk ACL"); 2843 return (DCMD_ERR); 2844 } 2845 2846 return (DCMD_OK); 2847 } 2848 2849 /* ARGSUSED */ 2850 static int 2851 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 2852 { 2853 if (wsp->walk_addr == NULL) { 2854 mdb_warn("must supply address of zfs_acl_node_t\n"); 2855 return (WALK_ERR); 2856 } 2857 2858 wsp->walk_addr += 2859 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); 2860 2861 if (mdb_layered_walk("list", wsp) == -1) { 2862 mdb_warn("failed to walk 'list'\n"); 2863 return (WALK_ERR); 2864 } 2865 2866 return (WALK_NEXT); 2867 } 2868 2869 static int 2870 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 2871 { 2872 zfs_acl_node_t aclnode; 2873 2874 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 2875 wsp->walk_addr) == -1) { 2876 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 2877 return (WALK_ERR); 2878 } 2879 2880 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 2881 } 2882 2883 typedef struct ace_walk_data { 2884 int ace_count; 2885 int ace_version; 2886 } ace_walk_data_t; 2887 2888 static int 2889 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 2890 int ace_count, uintptr_t ace_data) 2891 { 2892 ace_walk_data_t *ace_walk_data; 2893 2894 if (wsp->walk_addr == NULL) { 2895 mdb_warn("must supply address of zfs_acl_node_t\n"); 2896 return (WALK_ERR); 2897 } 2898 2899 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 2900 2901 ace_walk_data->ace_count = ace_count; 2902 ace_walk_data->ace_version = version; 2903 2904 wsp->walk_addr = ace_data; 2905 wsp->walk_data = ace_walk_data; 2906 2907 return (WALK_NEXT); 2908 } 2909 2910 static int 2911 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 2912 { 2913 static int gotid; 2914 static mdb_ctf_id_t acl_id; 2915 int z_ace_count; 2916 uintptr_t z_acldata; 2917 2918 if (!gotid) { 2919 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 2920 &acl_id) == -1) { 2921 mdb_warn("couldn't find struct zfs_acl_node"); 2922 return (DCMD_ERR); 2923 } 2924 gotid = TRUE; 2925 } 2926 2927 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 2928 return (DCMD_ERR); 2929 } 2930 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 2931 return (DCMD_ERR); 2932 } 2933 2934 return (zfs_aces_walk_init_common(wsp, version, 2935 z_ace_count, z_acldata)); 2936 } 2937 2938 /* ARGSUSED */ 2939 static int 2940 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 2941 { 2942 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 2943 } 2944 2945 /* ARGSUSED */ 2946 static int 2947 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 2948 { 2949 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 2950 } 2951 2952 static int 2953 zfs_aces_walk_step(mdb_walk_state_t *wsp) 2954 { 2955 ace_walk_data_t *ace_data = wsp->walk_data; 2956 zfs_ace_t zace; 2957 ace_t *acep; 2958 int status; 2959 int entry_type; 2960 int allow_type; 2961 uintptr_t ptr; 2962 2963 if (ace_data->ace_count == 0) 2964 return (WALK_DONE); 2965 2966 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 2967 mdb_warn("failed to read zfs_ace_t at %#lx", 2968 wsp->walk_addr); 2969 return (WALK_ERR); 2970 } 2971 2972 switch (ace_data->ace_version) { 2973 case 0: 2974 acep = (ace_t *)&zace; 2975 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 2976 allow_type = acep->a_type; 2977 break; 2978 case 1: 2979 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 2980 allow_type = zace.z_hdr.z_type; 2981 break; 2982 default: 2983 return (WALK_ERR); 2984 } 2985 2986 ptr = (uintptr_t)wsp->walk_addr; 2987 switch (entry_type) { 2988 case ACE_OWNER: 2989 case ACE_EVERYONE: 2990 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2991 ptr += ace_data->ace_version == 0 ? 2992 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 2993 break; 2994 case ACE_IDENTIFIER_GROUP: 2995 default: 2996 switch (allow_type) { 2997 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 2998 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 2999 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 3000 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 3001 ptr += ace_data->ace_version == 0 ? 3002 sizeof (ace_t) : sizeof (zfs_object_ace_t); 3003 break; 3004 default: 3005 ptr += ace_data->ace_version == 0 ? 3006 sizeof (ace_t) : sizeof (zfs_ace_t); 3007 break; 3008 } 3009 } 3010 3011 ace_data->ace_count--; 3012 status = wsp->walk_callback(wsp->walk_addr, 3013 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 3014 3015 wsp->walk_addr = ptr; 3016 return (status); 3017 } 3018 3019 typedef struct mdb_zfs_rrwlock { 3020 uintptr_t rr_writer; 3021 boolean_t rr_writer_wanted; 3022 } mdb_zfs_rrwlock_t; 3023 3024 static uint_t rrw_key; 3025 3026 /* ARGSUSED */ 3027 static int 3028 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3029 { 3030 mdb_zfs_rrwlock_t rrw; 3031 3032 if (rrw_key == 0) { 3033 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) 3034 return (DCMD_ERR); 3035 } 3036 3037 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 3038 0) == -1) 3039 return (DCMD_ERR); 3040 3041 if (rrw.rr_writer != 0) { 3042 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer); 3043 return (DCMD_OK); 3044 } 3045 3046 if (rrw.rr_writer_wanted) { 3047 mdb_printf("writer wanted\n"); 3048 } 3049 3050 mdb_printf("anonymous references:\n"); 3051 (void) mdb_call_dcmd("refcount", addr + 3052 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), 3053 DCMD_ADDRSPEC, 0, NULL); 3054 3055 mdb_printf("linked references:\n"); 3056 (void) mdb_call_dcmd("refcount", addr + 3057 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), 3058 DCMD_ADDRSPEC, 0, NULL); 3059 3060 /* 3061 * XXX This should find references from 3062 * "::walk thread | ::tsd -v <rrw_key>", but there is no support 3063 * for programmatic consumption of dcmds, so this would be 3064 * difficult, potentially requiring reimplementing ::tsd (both 3065 * user and kernel versions) in this MDB module. 3066 */ 3067 3068 return (DCMD_OK); 3069 } 3070 3071 /* 3072 * MDB module linkage information: 3073 * 3074 * We declare a list of structures describing our dcmds, and a function 3075 * named _mdb_init to return a pointer to our module information. 3076 */ 3077 3078 static const mdb_dcmd_t dcmds[] = { 3079 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 3080 { "blkptr", ":", "print blkptr_t", blkptr }, 3081 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 3082 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 3083 { "dbufs", 3084 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 3085 "[-o object | \"mdn\"] \n" 3086 "\t[-l level] [-b blkid | \"bonus\"]", 3087 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 3088 { "abuf_find", "dva_word[0] dva_word[1]", 3089 "find arc_buf_hdr_t of a specified DVA", 3090 abuf_find }, 3091 { "spa", "?[-cv]", "spa_t summary", spa_print }, 3092 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 3093 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 3094 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs }, 3095 { "vdev", ":[-re]\n" 3096 "\t-r display recursively\n" 3097 "\t-e print statistics", 3098 "vdev_t summary", vdev_print }, 3099 { "zio", ":[cpr]\n" 3100 "\t-c display children\n" 3101 "\t-p display parents\n" 3102 "\t-r display recursively", 3103 "zio_t summary", zio_print }, 3104 { "zio_state", "?", "print out all zio_t structures on system or " 3105 "for a particular pool", zio_state }, 3106 { "zfs_blkstats", ":[-v]", 3107 "given a spa_t, print block type stats from last scrub", 3108 zfs_blkstats }, 3109 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 3110 { "refcount", ":[-r]\n" 3111 "\t-r display recently removed references", 3112 "print refcount_t holders", refcount }, 3113 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 3114 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 3115 zfs_acl_dump }, 3116 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 3117 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 3118 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 3119 sa_attr_table}, 3120 { "sa_attr", ": attr_id", 3121 "print SA attribute address when given sa_handle_t", sa_attr_print}, 3122 { "zfs_dbgmsg", ":[-va]", 3123 "print zfs debug log", dbgmsg}, 3124 { "rrwlock", ":", 3125 "print rrwlock_t, including readers", rrwlock}, 3126 { NULL } 3127 }; 3128 3129 static const mdb_walker_t walkers[] = { 3130 { "zms_freelist", "walk ZFS metaslab freelist", 3131 freelist_walk_init, freelist_walk_step, NULL }, 3132 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 3133 txg_list_walk_init, txg_list_walk_step, NULL }, 3134 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 3135 txg_list0_walk_init, txg_list_walk_step, NULL }, 3136 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 3137 txg_list1_walk_init, txg_list_walk_step, NULL }, 3138 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 3139 txg_list2_walk_init, txg_list_walk_step, NULL }, 3140 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 3141 txg_list3_walk_init, txg_list_walk_step, NULL }, 3142 { "zio", "walk all zio structures, optionally for a particular spa_t", 3143 zio_walk_init, zio_walk_step, NULL }, 3144 { "zio_root", 3145 "walk all root zio_t structures, optionally for a particular spa_t", 3146 zio_walk_init, zio_walk_root_step, NULL }, 3147 { "spa", "walk all spa_t entries in the namespace", 3148 spa_walk_init, spa_walk_step, NULL }, 3149 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 3150 metaslab_walk_init, metaslab_walk_step, NULL }, 3151 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 3152 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 3153 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 3154 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 3155 { "zfs_acl_node_aces0", 3156 "given a zfs_acl_node_t, walk all ACEs as ace_t", 3157 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 3158 { NULL } 3159 }; 3160 3161 static const mdb_modinfo_t modinfo = { 3162 MDB_API_VERSION, dcmds, walkers 3163 }; 3164 3165 const mdb_modinfo_t * 3166 _mdb_init(void) 3167 { 3168 return (&modinfo); 3169 } 3170