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