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) 2011, 2015 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 enum spa_flags { 60 SPA_FLAG_CONFIG = 1 << 0, 61 SPA_FLAG_VDEVS = 1 << 1, 62 SPA_FLAG_ERRORS = 1 << 2, 63 SPA_FLAG_METASLAB_GROUPS = 1 << 3, 64 SPA_FLAG_METASLABS = 1 << 4, 65 SPA_FLAG_HISTOGRAMS = 1 << 5 66 }; 67 68 #define SPA_FLAG_ALL_VDEV \ 69 (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \ 70 SPA_FLAG_METASLABS | SPA_FLAG_HISTOGRAMS) 71 72 static int 73 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 74 const char *member, int len, void *buf) 75 { 76 mdb_ctf_id_t id; 77 ulong_t off; 78 char name[64]; 79 80 if (idp == NULL) { 81 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 82 mdb_warn("couldn't find type %s", type); 83 return (DCMD_ERR); 84 } 85 idp = &id; 86 } else { 87 type = name; 88 mdb_ctf_type_name(*idp, name, sizeof (name)); 89 } 90 91 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 92 mdb_warn("couldn't find member %s of type %s\n", member, type); 93 return (DCMD_ERR); 94 } 95 if (off % 8 != 0) { 96 mdb_warn("member %s of type %s is unsupported bitfield", 97 member, type); 98 return (DCMD_ERR); 99 } 100 off /= 8; 101 102 if (mdb_vread(buf, len, addr + off) == -1) { 103 mdb_warn("failed to read %s from %s at %p", 104 member, type, addr + off); 105 return (DCMD_ERR); 106 } 107 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 108 109 return (0); 110 } 111 112 #define GETMEMB(addr, structname, member, dest) \ 113 getmember(addr, ZFS_STRUCT structname, NULL, #member, \ 114 sizeof (dest), &(dest)) 115 116 #define GETMEMBID(addr, ctfid, member, dest) \ 117 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 118 119 static boolean_t 120 strisprint(const char *cp) 121 { 122 for (; *cp; cp++) { 123 if (!isprint(*cp)) 124 return (B_FALSE); 125 } 126 return (B_TRUE); 127 } 128 129 #define NICENUM_BUFLEN 6 130 131 static int 132 snprintfrac(char *buf, int len, 133 uint64_t numerator, uint64_t denom, int frac_digits) 134 { 135 int mul = 1; 136 int whole, frac, i; 137 138 for (i = frac_digits; i; i--) 139 mul *= 10; 140 whole = numerator / denom; 141 frac = mul * numerator / denom - mul * whole; 142 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); 143 } 144 145 static void 146 mdb_nicenum(uint64_t num, char *buf) 147 { 148 uint64_t n = num; 149 int index = 0; 150 char *u; 151 152 while (n >= 1024) { 153 n = (n + (1024 / 2)) / 1024; /* Round up or down */ 154 index++; 155 } 156 157 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; 158 159 if (index == 0) { 160 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", 161 (u_longlong_t)n); 162 } else if (n < 10 && (num & (num - 1)) != 0) { 163 (void) snprintfrac(buf, NICENUM_BUFLEN, 164 num, 1ULL << 10 * index, 2); 165 strcat(buf, u); 166 } else if (n < 100 && (num & (num - 1)) != 0) { 167 (void) snprintfrac(buf, NICENUM_BUFLEN, 168 num, 1ULL << 10 * index, 1); 169 strcat(buf, u); 170 } else { 171 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", 172 (u_longlong_t)n, u); 173 } 174 } 175 176 static int verbose; 177 178 static int 179 freelist_walk_init(mdb_walk_state_t *wsp) 180 { 181 if (wsp->walk_addr == NULL) { 182 mdb_warn("must supply starting address\n"); 183 return (WALK_ERR); 184 } 185 186 wsp->walk_data = 0; /* Index into the freelist */ 187 return (WALK_NEXT); 188 } 189 190 static int 191 freelist_walk_step(mdb_walk_state_t *wsp) 192 { 193 uint64_t entry; 194 uintptr_t number = (uintptr_t)wsp->walk_data; 195 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID", 196 "INVALID", "INVALID", "INVALID", "INVALID" }; 197 int mapshift = SPA_MINBLOCKSHIFT; 198 199 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) { 200 mdb_warn("failed to read freelist entry %p", wsp->walk_addr); 201 return (WALK_DONE); 202 } 203 wsp->walk_addr += sizeof (entry); 204 wsp->walk_data = (void *)(number + 1); 205 206 if (SM_DEBUG_DECODE(entry)) { 207 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n", 208 number, 209 ddata[SM_DEBUG_ACTION_DECODE(entry)], 210 SM_DEBUG_TXG_DECODE(entry), 211 SM_DEBUG_SYNCPASS_DECODE(entry)); 212 } else { 213 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c " 214 "size=%06llx", number, 215 SM_OFFSET_DECODE(entry) << mapshift, 216 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) << 217 mapshift, 218 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F', 219 SM_RUN_DECODE(entry) << mapshift); 220 if (verbose) 221 mdb_printf(" (raw=%012llx)\n", entry); 222 mdb_printf("\n"); 223 } 224 return (WALK_NEXT); 225 } 226 227 static int 228 mdb_dsl_dir_name(uintptr_t addr, char *buf) 229 { 230 static int gotid; 231 static mdb_ctf_id_t dd_id; 232 uintptr_t dd_parent; 233 char dd_myname[ZFS_MAX_DATASET_NAME_LEN]; 234 235 if (!gotid) { 236 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir", 237 &dd_id) == -1) { 238 mdb_warn("couldn't find struct dsl_dir"); 239 return (DCMD_ERR); 240 } 241 gotid = TRUE; 242 } 243 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 244 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 245 return (DCMD_ERR); 246 } 247 248 if (dd_parent) { 249 if (mdb_dsl_dir_name(dd_parent, buf)) 250 return (DCMD_ERR); 251 strcat(buf, "/"); 252 } 253 254 if (dd_myname[0]) 255 strcat(buf, dd_myname); 256 else 257 strcat(buf, "???"); 258 259 return (0); 260 } 261 262 static int 263 objset_name(uintptr_t addr, char *buf) 264 { 265 static int gotid; 266 static mdb_ctf_id_t os_id, ds_id; 267 uintptr_t os_dsl_dataset; 268 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN]; 269 uintptr_t ds_dir; 270 271 buf[0] = '\0'; 272 273 if (!gotid) { 274 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset", 275 &os_id) == -1) { 276 mdb_warn("couldn't find struct objset"); 277 return (DCMD_ERR); 278 } 279 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset", 280 &ds_id) == -1) { 281 mdb_warn("couldn't find struct dsl_dataset"); 282 return (DCMD_ERR); 283 } 284 285 gotid = TRUE; 286 } 287 288 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset)) 289 return (DCMD_ERR); 290 291 if (os_dsl_dataset == 0) { 292 strcat(buf, "mos"); 293 return (0); 294 } 295 296 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 297 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 298 return (DCMD_ERR); 299 } 300 301 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf)) 302 return (DCMD_ERR); 303 304 if (ds_snapname[0]) { 305 strcat(buf, "@"); 306 strcat(buf, ds_snapname); 307 } 308 return (0); 309 } 310 311 static void 312 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val, 313 const char *prefix) 314 { 315 const char *cp; 316 size_t len = strlen(prefix); 317 318 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) { 319 if (strncmp(cp, prefix, len) == 0) 320 cp += len; 321 (void) strncpy(out, cp, size); 322 } else { 323 mdb_snprintf(out, size, "? (%d)", val); 324 } 325 } 326 327 /* ARGSUSED */ 328 static int 329 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 330 { 331 /* 332 * This table can be approximately generated by running: 333 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 334 */ 335 static const char *params[] = { 336 "arc_reduce_dnlc_percent", 337 "arc_lotsfree_percent", 338 "zfs_dirty_data_max", 339 "zfs_dirty_data_sync", 340 "zfs_delay_max_ns", 341 "zfs_delay_min_dirty_percent", 342 "zfs_delay_scale", 343 "zfs_vdev_max_active", 344 "zfs_vdev_sync_read_min_active", 345 "zfs_vdev_sync_read_max_active", 346 "zfs_vdev_sync_write_min_active", 347 "zfs_vdev_sync_write_max_active", 348 "zfs_vdev_async_read_min_active", 349 "zfs_vdev_async_read_max_active", 350 "zfs_vdev_async_write_min_active", 351 "zfs_vdev_async_write_max_active", 352 "zfs_vdev_scrub_min_active", 353 "zfs_vdev_scrub_max_active", 354 "zfs_vdev_async_write_active_min_dirty_percent", 355 "zfs_vdev_async_write_active_max_dirty_percent", 356 "spa_asize_inflation", 357 "zfs_arc_max", 358 "zfs_arc_min", 359 "arc_shrink_shift", 360 "zfs_mdcomp_disable", 361 "zfs_prefetch_disable", 362 "zfetch_max_streams", 363 "zfetch_min_sec_reap", 364 "zfetch_block_cap", 365 "zfetch_array_rd_sz", 366 "zfs_default_bs", 367 "zfs_default_ibs", 368 "metaslab_aliquot", 369 "reference_tracking_enable", 370 "reference_history", 371 "spa_max_replication_override", 372 "spa_mode_global", 373 "zfs_flags", 374 "zfs_txg_timeout", 375 "zfs_vdev_cache_max", 376 "zfs_vdev_cache_size", 377 "zfs_vdev_cache_bshift", 378 "vdev_mirror_shift", 379 "zfs_scrub_limit", 380 "zfs_no_scrub_io", 381 "zfs_no_scrub_prefetch", 382 "zfs_vdev_aggregation_limit", 383 "fzap_default_block_shift", 384 "zfs_immediate_write_sz", 385 "zfs_read_chunk_size", 386 "zfs_nocacheflush", 387 "zil_replay_disable", 388 "metaslab_gang_bang", 389 "metaslab_df_alloc_threshold", 390 "metaslab_df_free_pct", 391 "zio_injection_enabled", 392 "zvol_immediate_write_sz", 393 }; 394 395 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 396 int sz; 397 uint64_t val64; 398 uint32_t *val32p = (uint32_t *)&val64; 399 400 sz = mdb_readvar(&val64, params[i]); 401 if (sz == 4) { 402 mdb_printf("%s = 0x%x\n", params[i], *val32p); 403 } else if (sz == 8) { 404 mdb_printf("%s = 0x%llx\n", params[i], val64); 405 } else { 406 mdb_warn("variable %s not found", params[i]); 407 } 408 } 409 410 return (DCMD_OK); 411 } 412 413 /* ARGSUSED */ 414 static int 415 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 416 { 417 mdb_ctf_id_t type_enum, checksum_enum, compress_enum; 418 char type[80], checksum[80], compress[80]; 419 blkptr_t blk, *bp = &blk; 420 char buf[BP_SPRINTF_LEN]; 421 422 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { 423 mdb_warn("failed to read blkptr_t"); 424 return (DCMD_ERR); 425 } 426 427 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 || 428 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 || 429 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) { 430 mdb_warn("Could not find blkptr enumerated types"); 431 return (DCMD_ERR); 432 } 433 434 enum_lookup(type, sizeof (type), type_enum, 435 BP_GET_TYPE(bp), "DMU_OT_"); 436 enum_lookup(checksum, sizeof (checksum), checksum_enum, 437 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_"); 438 enum_lookup(compress, sizeof (compress), compress_enum, 439 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_"); 440 441 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type, 442 checksum, compress); 443 444 mdb_printf("%s\n", buf); 445 446 return (DCMD_OK); 447 } 448 449 typedef struct mdb_dmu_buf_impl { 450 struct { 451 uint64_t db_object; 452 uintptr_t db_data; 453 } db; 454 uintptr_t db_objset; 455 uint64_t db_level; 456 uint64_t db_blkid; 457 struct { 458 uint64_t rc_count; 459 } db_holds; 460 } mdb_dmu_buf_impl_t; 461 462 /* ARGSUSED */ 463 static int 464 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 465 { 466 mdb_dmu_buf_impl_t db; 467 char objectname[32]; 468 char blkidname[32]; 469 char path[ZFS_MAX_DATASET_NAME_LEN]; 470 471 if (DCMD_HDRSPEC(flags)) 472 mdb_printf(" addr object lvl blkid holds os\n"); 473 474 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 475 addr, 0) == -1) 476 return (DCMD_ERR); 477 478 if (db.db.db_object == DMU_META_DNODE_OBJECT) 479 (void) strcpy(objectname, "mdn"); 480 else 481 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 482 (u_longlong_t)db.db.db_object); 483 484 if (db.db_blkid == DMU_BONUS_BLKID) 485 (void) strcpy(blkidname, "bonus"); 486 else 487 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 488 (u_longlong_t)db.db_blkid); 489 490 if (objset_name(db.db_objset, path)) { 491 return (DCMD_ERR); 492 } 493 494 mdb_printf("%p %8s %1u %9s %2llu %s\n", addr, 495 objectname, (int)db.db_level, blkidname, 496 db.db_holds.rc_count, path); 497 498 return (DCMD_OK); 499 } 500 501 /* ARGSUSED */ 502 static int 503 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 504 { 505 #define HISTOSZ 32 506 uintptr_t dbp; 507 dmu_buf_impl_t db; 508 dbuf_hash_table_t ht; 509 uint64_t bucket, ndbufs; 510 uint64_t histo[HISTOSZ]; 511 uint64_t histo2[HISTOSZ]; 512 int i, maxidx; 513 514 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 515 mdb_warn("failed to read 'dbuf_hash_table'"); 516 return (DCMD_ERR); 517 } 518 519 for (i = 0; i < HISTOSZ; i++) { 520 histo[i] = 0; 521 histo2[i] = 0; 522 } 523 524 ndbufs = 0; 525 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 526 int len; 527 528 if (mdb_vread(&dbp, sizeof (void *), 529 (uintptr_t)(ht.hash_table+bucket)) == -1) { 530 mdb_warn("failed to read hash bucket %u at %p", 531 bucket, ht.hash_table+bucket); 532 return (DCMD_ERR); 533 } 534 535 len = 0; 536 while (dbp != 0) { 537 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 538 dbp) == -1) { 539 mdb_warn("failed to read dbuf at %p", dbp); 540 return (DCMD_ERR); 541 } 542 dbp = (uintptr_t)db.db_hash_next; 543 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 544 histo2[i]++; 545 len++; 546 ndbufs++; 547 } 548 549 if (len >= HISTOSZ) 550 len = HISTOSZ-1; 551 histo[len]++; 552 } 553 554 mdb_printf("hash table has %llu buckets, %llu dbufs " 555 "(avg %llu buckets/dbuf)\n", 556 ht.hash_table_mask+1, ndbufs, 557 (ht.hash_table_mask+1)/ndbufs); 558 559 mdb_printf("\n"); 560 maxidx = 0; 561 for (i = 0; i < HISTOSZ; i++) 562 if (histo[i] > 0) 563 maxidx = i; 564 mdb_printf("hash chain length number of buckets\n"); 565 for (i = 0; i <= maxidx; i++) 566 mdb_printf("%u %llu\n", i, histo[i]); 567 568 mdb_printf("\n"); 569 maxidx = 0; 570 for (i = 0; i < HISTOSZ; i++) 571 if (histo2[i] > 0) 572 maxidx = i; 573 mdb_printf("hash chain depth number of dbufs\n"); 574 for (i = 0; i <= maxidx; i++) 575 mdb_printf("%u or more %llu %llu%%\n", 576 i, histo2[i], histo2[i]*100/ndbufs); 577 578 579 return (DCMD_OK); 580 } 581 582 #define CHAIN_END 0xffff 583 /* 584 * ::zap_leaf [-v] 585 * 586 * Print a zap_leaf_phys_t, assumed to be 16k 587 */ 588 /* ARGSUSED */ 589 static int 590 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 591 { 592 char buf[16*1024]; 593 int verbose = B_FALSE; 594 int four = B_FALSE; 595 dmu_buf_t l_dbuf; 596 zap_leaf_t l; 597 zap_leaf_phys_t *zlp = (void *)buf; 598 int i; 599 600 if (mdb_getopts(argc, argv, 601 'v', MDB_OPT_SETBITS, TRUE, &verbose, 602 '4', MDB_OPT_SETBITS, TRUE, &four, 603 NULL) != argc) 604 return (DCMD_USAGE); 605 606 l_dbuf.db_data = zlp; 607 l.l_dbuf = &l_dbuf; 608 l.l_bs = 14; /* assume 16k blocks */ 609 if (four) 610 l.l_bs = 12; 611 612 if (!(flags & DCMD_ADDRSPEC)) { 613 return (DCMD_USAGE); 614 } 615 616 if (mdb_vread(buf, sizeof (buf), addr) == -1) { 617 mdb_warn("failed to read zap_leaf_phys_t at %p", addr); 618 return (DCMD_ERR); 619 } 620 621 if (zlp->l_hdr.lh_block_type != ZBT_LEAF || 622 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { 623 mdb_warn("This does not appear to be a zap_leaf_phys_t"); 624 return (DCMD_ERR); 625 } 626 627 mdb_printf("zap_leaf_phys_t at %p:\n", addr); 628 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); 629 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); 630 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); 631 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, 632 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); 633 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); 634 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, 635 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? 636 "ENTRIES_CDSORTED" : ""); 637 638 if (verbose) { 639 mdb_printf(" hash table:\n"); 640 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { 641 if (zlp->l_hash[i] != CHAIN_END) 642 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); 643 } 644 } 645 646 mdb_printf(" chunks:\n"); 647 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { 648 /* LINTED: alignment */ 649 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); 650 switch (zlc->l_entry.le_type) { 651 case ZAP_CHUNK_FREE: 652 if (verbose) { 653 mdb_printf(" %u: free; lf_next = %u\n", 654 i, zlc->l_free.lf_next); 655 } 656 break; 657 case ZAP_CHUNK_ENTRY: 658 mdb_printf(" %u: entry\n", i); 659 if (verbose) { 660 mdb_printf(" le_next = %u\n", 661 zlc->l_entry.le_next); 662 } 663 mdb_printf(" le_name_chunk = %u\n", 664 zlc->l_entry.le_name_chunk); 665 mdb_printf(" le_name_numints = %u\n", 666 zlc->l_entry.le_name_numints); 667 mdb_printf(" le_value_chunk = %u\n", 668 zlc->l_entry.le_value_chunk); 669 mdb_printf(" le_value_intlen = %u\n", 670 zlc->l_entry.le_value_intlen); 671 mdb_printf(" le_value_numints = %u\n", 672 zlc->l_entry.le_value_numints); 673 mdb_printf(" le_cd = %u\n", 674 zlc->l_entry.le_cd); 675 mdb_printf(" le_hash = %llx\n", 676 zlc->l_entry.le_hash); 677 break; 678 case ZAP_CHUNK_ARRAY: 679 mdb_printf(" %u: array", i); 680 if (strisprint((char *)zlc->l_array.la_array)) 681 mdb_printf(" \"%s\"", zlc->l_array.la_array); 682 mdb_printf("\n"); 683 if (verbose) { 684 int j; 685 mdb_printf(" "); 686 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { 687 mdb_printf("%02x ", 688 zlc->l_array.la_array[j]); 689 } 690 mdb_printf("\n"); 691 } 692 if (zlc->l_array.la_next != CHAIN_END) { 693 mdb_printf(" lf_next = %u\n", 694 zlc->l_array.la_next); 695 } 696 break; 697 default: 698 mdb_printf(" %u: undefined type %u\n", 699 zlc->l_entry.le_type); 700 } 701 } 702 703 return (DCMD_OK); 704 } 705 706 typedef struct dbufs_data { 707 mdb_ctf_id_t id; 708 uint64_t objset; 709 uint64_t object; 710 uint64_t level; 711 uint64_t blkid; 712 char *osname; 713 } dbufs_data_t; 714 715 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 716 717 /* ARGSUSED */ 718 static int 719 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 720 { 721 dbufs_data_t *data = arg; 722 uintptr_t objset; 723 dmu_buf_t db; 724 uint8_t level; 725 uint64_t blkid; 726 char osname[ZFS_MAX_DATASET_NAME_LEN]; 727 728 if (GETMEMBID(addr, &data->id, db_objset, objset) || 729 GETMEMBID(addr, &data->id, db, db) || 730 GETMEMBID(addr, &data->id, db_level, level) || 731 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 732 return (WALK_ERR); 733 } 734 735 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 736 (data->osname == NULL || (objset_name(objset, osname) == 0 && 737 strcmp(data->osname, osname) == 0)) && 738 (data->object == DBUFS_UNSET || data->object == db.db_object) && 739 (data->level == DBUFS_UNSET || data->level == level) && 740 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 741 mdb_printf("%#lr\n", addr); 742 } 743 return (WALK_NEXT); 744 } 745 746 /* ARGSUSED */ 747 static int 748 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 749 { 750 dbufs_data_t data; 751 char *object = NULL; 752 char *blkid = NULL; 753 754 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 755 data.osname = NULL; 756 757 if (mdb_getopts(argc, argv, 758 'O', MDB_OPT_UINT64, &data.objset, 759 'n', MDB_OPT_STR, &data.osname, 760 'o', MDB_OPT_STR, &object, 761 'l', MDB_OPT_UINT64, &data.level, 762 'b', MDB_OPT_STR, &blkid) != argc) { 763 return (DCMD_USAGE); 764 } 765 766 if (object) { 767 if (strcmp(object, "mdn") == 0) { 768 data.object = DMU_META_DNODE_OBJECT; 769 } else { 770 data.object = mdb_strtoull(object); 771 } 772 } 773 774 if (blkid) { 775 if (strcmp(blkid, "bonus") == 0) { 776 data.blkid = DMU_BONUS_BLKID; 777 } else { 778 data.blkid = mdb_strtoull(blkid); 779 } 780 } 781 782 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) { 783 mdb_warn("couldn't find struct dmu_buf_impl_t"); 784 return (DCMD_ERR); 785 } 786 787 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 788 mdb_warn("can't walk dbufs"); 789 return (DCMD_ERR); 790 } 791 792 return (DCMD_OK); 793 } 794 795 typedef struct abuf_find_data { 796 dva_t dva; 797 mdb_ctf_id_t id; 798 } abuf_find_data_t; 799 800 /* ARGSUSED */ 801 static int 802 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 803 { 804 abuf_find_data_t *data = arg; 805 dva_t dva; 806 807 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 808 return (WALK_ERR); 809 } 810 811 if (dva.dva_word[0] == data->dva.dva_word[0] && 812 dva.dva_word[1] == data->dva.dva_word[1]) { 813 mdb_printf("%#lr\n", addr); 814 } 815 return (WALK_NEXT); 816 } 817 818 /* ARGSUSED */ 819 static int 820 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 821 { 822 abuf_find_data_t data; 823 GElf_Sym sym; 824 int i; 825 const char *syms[] = { 826 "ARC_mru", 827 "ARC_mru_ghost", 828 "ARC_mfu", 829 "ARC_mfu_ghost", 830 }; 831 832 if (argc != 2) 833 return (DCMD_USAGE); 834 835 for (i = 0; i < 2; i ++) { 836 switch (argv[i].a_type) { 837 case MDB_TYPE_STRING: 838 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 839 break; 840 case MDB_TYPE_IMMEDIATE: 841 data.dva.dva_word[i] = argv[i].a_un.a_val; 842 break; 843 default: 844 return (DCMD_USAGE); 845 } 846 } 847 848 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) { 849 mdb_warn("couldn't find struct arc_buf_hdr"); 850 return (DCMD_ERR); 851 } 852 853 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 854 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) { 855 mdb_warn("can't find symbol %s", syms[i]); 856 return (DCMD_ERR); 857 } 858 859 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 860 mdb_warn("can't walk %s", syms[i]); 861 return (DCMD_ERR); 862 } 863 } 864 865 return (DCMD_OK); 866 } 867 868 869 typedef struct dbgmsg_arg { 870 boolean_t da_verbose; 871 boolean_t da_address; 872 } dbgmsg_arg_t; 873 874 /* ARGSUSED */ 875 static int 876 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 877 { 878 static mdb_ctf_id_t id; 879 static boolean_t gotid; 880 static ulong_t off; 881 882 dbgmsg_arg_t *da = arg; 883 time_t timestamp; 884 char buf[1024]; 885 886 if (!gotid) { 887 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == 888 -1) { 889 mdb_warn("couldn't find struct zfs_dbgmsg"); 890 return (WALK_ERR); 891 } 892 gotid = TRUE; 893 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 894 mdb_warn("couldn't find zdm_msg"); 895 return (WALK_ERR); 896 } 897 off /= 8; 898 } 899 900 901 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 902 return (WALK_ERR); 903 } 904 905 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 906 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 907 return (DCMD_ERR); 908 } 909 910 if (da->da_address) 911 mdb_printf("%p ", addr); 912 if (da->da_verbose) 913 mdb_printf("%Y ", timestamp); 914 915 mdb_printf("%s\n", buf); 916 917 if (da->da_verbose) 918 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 919 920 return (WALK_NEXT); 921 } 922 923 /* ARGSUSED */ 924 static int 925 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 926 { 927 GElf_Sym sym; 928 dbgmsg_arg_t da = { 0 }; 929 930 if (mdb_getopts(argc, argv, 931 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 932 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, 933 NULL) != argc) 934 return (DCMD_USAGE); 935 936 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { 937 mdb_warn("can't find zfs_dbgmsgs"); 938 return (DCMD_ERR); 939 } 940 941 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { 942 mdb_warn("can't walk zfs_dbgmsgs"); 943 return (DCMD_ERR); 944 } 945 946 return (DCMD_OK); 947 } 948 949 /*ARGSUSED*/ 950 static int 951 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 952 { 953 kstat_named_t *stats; 954 GElf_Sym sym; 955 int nstats, i; 956 uint_t opt_a = FALSE; 957 uint_t opt_b = FALSE; 958 uint_t shift = 0; 959 const char *suffix; 960 961 static const char *bytestats[] = { 962 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 963 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 964 "arc_meta_min", "hdr_size", "data_size", "metadata_size", 965 "other_size", "anon_size", "anon_evictable_data", 966 "anon_evictable_metadata", "mru_size", "mru_evictable_data", 967 "mru_evictable_metadata", "mru_ghost_size", 968 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata", 969 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata", 970 "mfu_ghost_size", "mfu_ghost_evictable_data", 971 "mfu_ghost_evictable_metadata", "evict_l2_cached", 972 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes", 973 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size", 974 NULL 975 }; 976 977 static const char *extras[] = { 978 "arc_no_grow", "arc_tempreserve", 979 NULL 980 }; 981 982 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) { 983 mdb_warn("failed to find 'arc_stats'"); 984 return (DCMD_ERR); 985 } 986 987 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 988 989 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 990 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 991 return (DCMD_ERR); 992 } 993 994 nstats = sym.st_size / sizeof (kstat_named_t); 995 996 /* NB: -a / opt_a are ignored for backwards compatability */ 997 if (mdb_getopts(argc, argv, 998 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 999 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 1000 'k', MDB_OPT_SETBITS, 10, &shift, 1001 'm', MDB_OPT_SETBITS, 20, &shift, 1002 'g', MDB_OPT_SETBITS, 30, &shift, 1003 NULL) != argc) 1004 return (DCMD_USAGE); 1005 1006 if (!opt_b && !shift) 1007 shift = 20; 1008 1009 switch (shift) { 1010 case 0: 1011 suffix = "B"; 1012 break; 1013 case 10: 1014 suffix = "KB"; 1015 break; 1016 case 20: 1017 suffix = "MB"; 1018 break; 1019 case 30: 1020 suffix = "GB"; 1021 break; 1022 default: 1023 suffix = "XX"; 1024 } 1025 1026 for (i = 0; i < nstats; i++) { 1027 int j; 1028 boolean_t bytes = B_FALSE; 1029 1030 for (j = 0; bytestats[j]; j++) { 1031 if (strcmp(stats[i].name, bytestats[j]) == 0) { 1032 bytes = B_TRUE; 1033 break; 1034 } 1035 } 1036 1037 if (bytes) { 1038 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 1039 stats[i].value.ui64 >> shift, suffix); 1040 } else { 1041 mdb_printf("%-25s = %9llu\n", stats[i].name, 1042 stats[i].value.ui64); 1043 } 1044 } 1045 1046 for (i = 0; extras[i]; i++) { 1047 uint64_t buf; 1048 1049 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) { 1050 mdb_warn("failed to find '%s'", extras[i]); 1051 return (DCMD_ERR); 1052 } 1053 1054 if (sym.st_size != sizeof (uint64_t) && 1055 sym.st_size != sizeof (uint32_t)) { 1056 mdb_warn("expected scalar for variable '%s'\n", 1057 extras[i]); 1058 return (DCMD_ERR); 1059 } 1060 1061 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 1062 mdb_warn("couldn't read '%s'", extras[i]); 1063 return (DCMD_ERR); 1064 } 1065 1066 mdb_printf("%-25s = ", extras[i]); 1067 1068 /* NB: all the 64-bit extras happen to be byte counts */ 1069 if (sym.st_size == sizeof (uint64_t)) 1070 mdb_printf("%9llu %s\n", buf >> shift, suffix); 1071 1072 if (sym.st_size == sizeof (uint32_t)) 1073 mdb_printf("%9d\n", *((uint32_t *)&buf)); 1074 } 1075 return (DCMD_OK); 1076 } 1077 1078 typedef struct mdb_spa_print { 1079 pool_state_t spa_state; 1080 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; 1081 } mdb_spa_print_t; 1082 1083 /* 1084 * ::spa 1085 * 1086 * -c Print configuration information as well 1087 * -v Print vdev state 1088 * -e Print vdev error stats 1089 * -m Print vdev metaslab info 1090 * -M print vdev metaslab group info 1091 * -h Print histogram info (must be combined with -m or -M) 1092 * 1093 * Print a summarized spa_t. When given no arguments, prints out a table of all 1094 * active pools on the system. 1095 */ 1096 /* ARGSUSED */ 1097 static int 1098 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1099 { 1100 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1101 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1102 const char *state; 1103 int spa_flags = 0; 1104 1105 if (mdb_getopts(argc, argv, 1106 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags, 1107 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags, 1108 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1109 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1110 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1111 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1112 NULL) != argc) 1113 return (DCMD_USAGE); 1114 1115 if (!(flags & DCMD_ADDRSPEC)) { 1116 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1117 mdb_warn("can't walk spa"); 1118 return (DCMD_ERR); 1119 } 1120 1121 return (DCMD_OK); 1122 } 1123 1124 if (flags & DCMD_PIPE_OUT) { 1125 mdb_printf("%#lr\n", addr); 1126 return (DCMD_OK); 1127 } 1128 1129 if (DCMD_HDRSPEC(flags)) 1130 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1131 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1132 1133 mdb_spa_print_t spa; 1134 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1) 1135 return (DCMD_ERR); 1136 1137 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1138 state = "UNKNOWN"; 1139 else 1140 state = statetab[spa.spa_state]; 1141 1142 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1143 1144 if (spa_flags & SPA_FLAG_CONFIG) { 1145 mdb_printf("\n"); 1146 mdb_inc_indent(4); 1147 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1148 NULL) != DCMD_OK) 1149 return (DCMD_ERR); 1150 mdb_dec_indent(4); 1151 } 1152 1153 if (spa_flags & SPA_FLAG_ALL_VDEV) { 1154 mdb_arg_t v; 1155 char opts[100] = "-"; 1156 int args = 1157 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1; 1158 1159 if (spa_flags & SPA_FLAG_ERRORS) 1160 strcat(opts, "e"); 1161 if (spa_flags & SPA_FLAG_METASLABS) 1162 strcat(opts, "m"); 1163 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 1164 strcat(opts, "M"); 1165 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1166 strcat(opts, "h"); 1167 1168 v.a_type = MDB_TYPE_STRING; 1169 v.a_un.a_str = opts; 1170 1171 mdb_printf("\n"); 1172 mdb_inc_indent(4); 1173 if (mdb_call_dcmd("spa_vdevs", addr, flags, args, 1174 &v) != DCMD_OK) 1175 return (DCMD_ERR); 1176 mdb_dec_indent(4); 1177 } 1178 1179 return (DCMD_OK); 1180 } 1181 1182 typedef struct mdb_spa_config_spa { 1183 uintptr_t spa_config; 1184 } mdb_spa_config_spa_t; 1185 1186 /* 1187 * ::spa_config 1188 * 1189 * Given a spa_t, print the configuration information stored in spa_config. 1190 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1191 * We simply read the value of spa_config and pass off to ::nvlist. 1192 */ 1193 /* ARGSUSED */ 1194 static int 1195 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1196 { 1197 mdb_spa_config_spa_t spa; 1198 1199 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1200 return (DCMD_USAGE); 1201 1202 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", 1203 addr, 0) == -1) 1204 return (DCMD_ERR); 1205 1206 if (spa.spa_config == 0) { 1207 mdb_printf("(none)\n"); 1208 return (DCMD_OK); 1209 } 1210 1211 return (mdb_call_dcmd("nvlist", spa.spa_config, flags, 1212 0, NULL)); 1213 } 1214 1215 const char histo_stars[] = "****************************************"; 1216 const int histo_width = sizeof (histo_stars) - 1; 1217 1218 static void 1219 dump_histogram(const uint64_t *histo, int size, int offset) 1220 { 1221 int i; 1222 int minidx = size - 1; 1223 int maxidx = 0; 1224 uint64_t max = 0; 1225 1226 for (i = 0; i < size; i++) { 1227 if (histo[i] > max) 1228 max = histo[i]; 1229 if (histo[i] > 0 && i > maxidx) 1230 maxidx = i; 1231 if (histo[i] > 0 && i < minidx) 1232 minidx = i; 1233 } 1234 1235 if (max < histo_width) 1236 max = histo_width; 1237 1238 for (i = minidx; i <= maxidx; i++) { 1239 mdb_printf("%3u: %6llu %s\n", 1240 i + offset, (u_longlong_t)histo[i], 1241 &histo_stars[(max - histo[i]) * histo_width / max]); 1242 } 1243 } 1244 1245 typedef struct mdb_range_tree { 1246 uint64_t rt_space; 1247 } mdb_range_tree_t; 1248 1249 typedef struct mdb_metaslab_group { 1250 uint64_t mg_fragmentation; 1251 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 1252 } mdb_metaslab_group_t; 1253 1254 typedef struct mdb_metaslab { 1255 uint64_t ms_id; 1256 uint64_t ms_start; 1257 uint64_t ms_size; 1258 uint64_t ms_fragmentation; 1259 uintptr_t ms_alloctree[TXG_SIZE]; 1260 uintptr_t ms_freetree[TXG_SIZE]; 1261 uintptr_t ms_tree; 1262 uintptr_t ms_sm; 1263 } mdb_metaslab_t; 1264 1265 typedef struct mdb_space_map_phys_t { 1266 uint64_t smp_alloc; 1267 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE]; 1268 } mdb_space_map_phys_t; 1269 1270 typedef struct mdb_space_map { 1271 uint64_t sm_size; 1272 uint8_t sm_shift; 1273 uint64_t sm_alloc; 1274 uintptr_t sm_phys; 1275 } mdb_space_map_t; 1276 1277 typedef struct mdb_vdev { 1278 uintptr_t vdev_ms; 1279 uint64_t vdev_ms_count; 1280 vdev_stat_t vdev_stat; 1281 } mdb_vdev_t; 1282 1283 static int 1284 metaslab_stats(uintptr_t addr, int spa_flags) 1285 { 1286 mdb_vdev_t vdev; 1287 uintptr_t *vdev_ms; 1288 1289 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t", 1290 (uintptr_t)addr, 0) == -1) { 1291 mdb_warn("failed to read vdev at %p\n", addr); 1292 return (DCMD_ERR); 1293 } 1294 1295 mdb_inc_indent(4); 1296 mdb_printf("%<u>%-?s %6s %20s %10s %9s%</u>\n", "ADDR", "ID", 1297 "OFFSET", "FREE", "FRAGMENTATION"); 1298 1299 vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *), 1300 UM_SLEEP | UM_GC); 1301 if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *), 1302 (uintptr_t)vdev.vdev_ms) == -1) { 1303 mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms); 1304 return (DCMD_ERR); 1305 } 1306 1307 for (int m = 0; m < vdev.vdev_ms_count; m++) { 1308 mdb_metaslab_t ms; 1309 mdb_space_map_t sm = { 0 }; 1310 char free[NICENUM_BUFLEN]; 1311 1312 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1313 (uintptr_t)vdev_ms[m], 0) == -1) 1314 return (DCMD_ERR); 1315 1316 if (ms.ms_sm != NULL && 1317 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t", 1318 ms.ms_sm, 0) == -1) 1319 return (DCMD_ERR); 1320 1321 mdb_nicenum(ms.ms_size - sm.sm_alloc, free); 1322 1323 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id, 1324 ms.ms_start, free); 1325 if (ms.ms_fragmentation == ZFS_FRAG_INVALID) 1326 mdb_printf("%9s\n", "-"); 1327 else 1328 mdb_printf("%9llu%%\n", ms.ms_fragmentation); 1329 1330 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != NULL) { 1331 mdb_space_map_phys_t smp; 1332 1333 if (sm.sm_phys == NULL) 1334 continue; 1335 1336 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 1337 "mdb_space_map_phys_t", sm.sm_phys, 0); 1338 1339 dump_histogram(smp.smp_histogram, 1340 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift); 1341 } 1342 } 1343 mdb_dec_indent(4); 1344 return (DCMD_OK); 1345 } 1346 1347 static int 1348 metaslab_group_stats(uintptr_t addr, int spa_flags) 1349 { 1350 mdb_metaslab_group_t mg; 1351 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", 1352 (uintptr_t)addr, 0) == -1) { 1353 mdb_warn("failed to read vdev_mg at %p\n", addr); 1354 return (DCMD_ERR); 1355 } 1356 1357 mdb_inc_indent(4); 1358 mdb_printf("%<u>%-?s %15s%</u>\n", "ADDR", "FRAGMENTATION"); 1359 if (mg.mg_fragmentation == ZFS_FRAG_INVALID) 1360 mdb_printf("%0?p %15s\n", addr, "-"); 1361 else 1362 mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation); 1363 1364 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1365 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); 1366 mdb_dec_indent(4); 1367 return (DCMD_OK); 1368 } 1369 1370 /* 1371 * ::vdev 1372 * 1373 * Print out a summarized vdev_t, in the following form: 1374 * 1375 * ADDR STATE AUX DESC 1376 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1377 * 1378 * If '-r' is specified, recursively visit all children. 1379 * 1380 * With '-e', the statistics associated with the vdev are printed as well. 1381 */ 1382 static int 1383 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive, 1384 int spa_flags) 1385 { 1386 vdev_t vdev; 1387 char desc[MAXNAMELEN]; 1388 int c, children; 1389 uintptr_t *child; 1390 const char *state, *aux; 1391 1392 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1393 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1394 return (DCMD_ERR); 1395 } 1396 1397 if (flags & DCMD_PIPE_OUT) { 1398 mdb_printf("%#lr\n", addr); 1399 } else { 1400 if (vdev.vdev_path != NULL) { 1401 if (mdb_readstr(desc, sizeof (desc), 1402 (uintptr_t)vdev.vdev_path) == -1) { 1403 mdb_warn("failed to read vdev_path at %p\n", 1404 vdev.vdev_path); 1405 return (DCMD_ERR); 1406 } 1407 } else if (vdev.vdev_ops != NULL) { 1408 vdev_ops_t ops; 1409 if (mdb_vread(&ops, sizeof (ops), 1410 (uintptr_t)vdev.vdev_ops) == -1) { 1411 mdb_warn("failed to read vdev_ops at %p\n", 1412 vdev.vdev_ops); 1413 return (DCMD_ERR); 1414 } 1415 (void) strcpy(desc, ops.vdev_op_type); 1416 } else { 1417 (void) strcpy(desc, "<unknown>"); 1418 } 1419 1420 if (depth == 0 && DCMD_HDRSPEC(flags)) 1421 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1422 "ADDR", "STATE", "AUX", 1423 sizeof (uintptr_t) == 4 ? 43 : 35, 1424 "DESCRIPTION"); 1425 1426 mdb_printf("%0?p ", addr); 1427 1428 switch (vdev.vdev_state) { 1429 case VDEV_STATE_CLOSED: 1430 state = "CLOSED"; 1431 break; 1432 case VDEV_STATE_OFFLINE: 1433 state = "OFFLINE"; 1434 break; 1435 case VDEV_STATE_CANT_OPEN: 1436 state = "CANT_OPEN"; 1437 break; 1438 case VDEV_STATE_DEGRADED: 1439 state = "DEGRADED"; 1440 break; 1441 case VDEV_STATE_HEALTHY: 1442 state = "HEALTHY"; 1443 break; 1444 case VDEV_STATE_REMOVED: 1445 state = "REMOVED"; 1446 break; 1447 case VDEV_STATE_FAULTED: 1448 state = "FAULTED"; 1449 break; 1450 default: 1451 state = "UNKNOWN"; 1452 break; 1453 } 1454 1455 switch (vdev.vdev_stat.vs_aux) { 1456 case VDEV_AUX_NONE: 1457 aux = "-"; 1458 break; 1459 case VDEV_AUX_OPEN_FAILED: 1460 aux = "OPEN_FAILED"; 1461 break; 1462 case VDEV_AUX_CORRUPT_DATA: 1463 aux = "CORRUPT_DATA"; 1464 break; 1465 case VDEV_AUX_NO_REPLICAS: 1466 aux = "NO_REPLICAS"; 1467 break; 1468 case VDEV_AUX_BAD_GUID_SUM: 1469 aux = "BAD_GUID_SUM"; 1470 break; 1471 case VDEV_AUX_TOO_SMALL: 1472 aux = "TOO_SMALL"; 1473 break; 1474 case VDEV_AUX_BAD_LABEL: 1475 aux = "BAD_LABEL"; 1476 break; 1477 case VDEV_AUX_VERSION_NEWER: 1478 aux = "VERS_NEWER"; 1479 break; 1480 case VDEV_AUX_VERSION_OLDER: 1481 aux = "VERS_OLDER"; 1482 break; 1483 case VDEV_AUX_UNSUP_FEAT: 1484 aux = "UNSUP_FEAT"; 1485 break; 1486 case VDEV_AUX_SPARED: 1487 aux = "SPARED"; 1488 break; 1489 case VDEV_AUX_ERR_EXCEEDED: 1490 aux = "ERR_EXCEEDED"; 1491 break; 1492 case VDEV_AUX_IO_FAILURE: 1493 aux = "IO_FAILURE"; 1494 break; 1495 case VDEV_AUX_BAD_LOG: 1496 aux = "BAD_LOG"; 1497 break; 1498 case VDEV_AUX_EXTERNAL: 1499 aux = "EXTERNAL"; 1500 break; 1501 case VDEV_AUX_SPLIT_POOL: 1502 aux = "SPLIT_POOL"; 1503 break; 1504 default: 1505 aux = "UNKNOWN"; 1506 break; 1507 } 1508 1509 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1510 1511 if (spa_flags & SPA_FLAG_ERRORS) { 1512 vdev_stat_t *vs = &vdev.vdev_stat; 1513 int i; 1514 1515 mdb_inc_indent(4); 1516 mdb_printf("\n"); 1517 mdb_printf("%<u> %12s %12s %12s %12s " 1518 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1519 "IOCTL"); 1520 mdb_printf("OPS "); 1521 for (i = 1; i < ZIO_TYPES; i++) 1522 mdb_printf("%11#llx%s", vs->vs_ops[i], 1523 i == ZIO_TYPES - 1 ? "" : " "); 1524 mdb_printf("\n"); 1525 mdb_printf("BYTES "); 1526 for (i = 1; i < ZIO_TYPES; i++) 1527 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1528 i == ZIO_TYPES - 1 ? "" : " "); 1529 1530 1531 mdb_printf("\n"); 1532 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1533 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1534 mdb_printf("ECKSUM %10#llx\n", 1535 vs->vs_checksum_errors); 1536 mdb_dec_indent(4); 1537 mdb_printf("\n"); 1538 } 1539 1540 if (spa_flags & SPA_FLAG_METASLAB_GROUPS && 1541 vdev.vdev_mg != NULL) { 1542 metaslab_group_stats((uintptr_t)vdev.vdev_mg, 1543 spa_flags); 1544 } 1545 if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) { 1546 metaslab_stats((uintptr_t)addr, spa_flags); 1547 } 1548 } 1549 1550 children = vdev.vdev_children; 1551 1552 if (children == 0 || !recursive) 1553 return (DCMD_OK); 1554 1555 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1556 if (mdb_vread(child, children * sizeof (void *), 1557 (uintptr_t)vdev.vdev_child) == -1) { 1558 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1559 return (DCMD_ERR); 1560 } 1561 1562 for (c = 0; c < children; c++) { 1563 if (do_print_vdev(child[c], flags, depth + 2, recursive, 1564 spa_flags)) { 1565 return (DCMD_ERR); 1566 } 1567 } 1568 1569 return (DCMD_OK); 1570 } 1571 1572 static int 1573 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1574 { 1575 uint64_t depth = 0; 1576 boolean_t recursive = B_FALSE; 1577 int spa_flags = 0; 1578 1579 if (mdb_getopts(argc, argv, 1580 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1581 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1582 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1583 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1584 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1585 'd', MDB_OPT_UINT64, &depth, NULL) != argc) 1586 return (DCMD_USAGE); 1587 1588 if (!(flags & DCMD_ADDRSPEC)) { 1589 mdb_warn("no vdev_t address given\n"); 1590 return (DCMD_ERR); 1591 } 1592 1593 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags)); 1594 } 1595 1596 typedef struct metaslab_walk_data { 1597 uint64_t mw_numvdevs; 1598 uintptr_t *mw_vdevs; 1599 int mw_curvdev; 1600 uint64_t mw_nummss; 1601 uintptr_t *mw_mss; 1602 int mw_curms; 1603 } metaslab_walk_data_t; 1604 1605 static int 1606 metaslab_walk_step(mdb_walk_state_t *wsp) 1607 { 1608 metaslab_walk_data_t *mw = wsp->walk_data; 1609 metaslab_t ms; 1610 uintptr_t msp; 1611 1612 if (mw->mw_curvdev >= mw->mw_numvdevs) 1613 return (WALK_DONE); 1614 1615 if (mw->mw_mss == NULL) { 1616 uintptr_t mssp; 1617 uintptr_t vdevp; 1618 1619 ASSERT(mw->mw_curms == 0); 1620 ASSERT(mw->mw_nummss == 0); 1621 1622 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1623 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || 1624 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { 1625 return (WALK_ERR); 1626 } 1627 1628 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1629 UM_SLEEP | UM_GC); 1630 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1631 mssp) == -1) { 1632 mdb_warn("failed to read vdev_ms at %p", mssp); 1633 return (WALK_ERR); 1634 } 1635 } 1636 1637 if (mw->mw_curms >= mw->mw_nummss) { 1638 mw->mw_mss = NULL; 1639 mw->mw_curms = 0; 1640 mw->mw_nummss = 0; 1641 mw->mw_curvdev++; 1642 return (WALK_NEXT); 1643 } 1644 1645 msp = mw->mw_mss[mw->mw_curms]; 1646 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1647 mdb_warn("failed to read metaslab_t at %p", msp); 1648 return (WALK_ERR); 1649 } 1650 1651 mw->mw_curms++; 1652 1653 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1654 } 1655 1656 /* ARGSUSED */ 1657 static int 1658 metaslab_walk_init(mdb_walk_state_t *wsp) 1659 { 1660 metaslab_walk_data_t *mw; 1661 uintptr_t root_vdevp; 1662 uintptr_t childp; 1663 1664 if (wsp->walk_addr == NULL) { 1665 mdb_warn("must supply address of spa_t\n"); 1666 return (WALK_ERR); 1667 } 1668 1669 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1670 1671 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || 1672 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || 1673 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { 1674 return (DCMD_ERR); 1675 } 1676 1677 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1678 UM_SLEEP | UM_GC); 1679 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1680 childp) == -1) { 1681 mdb_warn("failed to read root vdev children at %p", childp); 1682 return (DCMD_ERR); 1683 } 1684 1685 wsp->walk_data = mw; 1686 1687 return (WALK_NEXT); 1688 } 1689 1690 typedef struct mdb_spa { 1691 uintptr_t spa_dsl_pool; 1692 uintptr_t spa_root_vdev; 1693 } mdb_spa_t; 1694 1695 typedef struct mdb_dsl_pool { 1696 uintptr_t dp_root_dir; 1697 } mdb_dsl_pool_t; 1698 1699 typedef struct mdb_dsl_dir { 1700 uintptr_t dd_dbuf; 1701 int64_t dd_space_towrite[TXG_SIZE]; 1702 } mdb_dsl_dir_t; 1703 1704 typedef struct mdb_dsl_dir_phys { 1705 uint64_t dd_used_bytes; 1706 uint64_t dd_compressed_bytes; 1707 uint64_t dd_uncompressed_bytes; 1708 } mdb_dsl_dir_phys_t; 1709 1710 typedef struct space_data { 1711 uint64_t ms_alloctree[TXG_SIZE]; 1712 uint64_t ms_freetree[TXG_SIZE]; 1713 uint64_t ms_tree; 1714 uint64_t avail; 1715 uint64_t nowavail; 1716 } space_data_t; 1717 1718 /* ARGSUSED */ 1719 static int 1720 space_cb(uintptr_t addr, const void *unknown, void *arg) 1721 { 1722 space_data_t *sd = arg; 1723 mdb_metaslab_t ms; 1724 mdb_range_tree_t rt; 1725 mdb_space_map_t sm = { 0 }; 1726 mdb_space_map_phys_t smp = { 0 }; 1727 int i; 1728 1729 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1730 addr, 0) == -1) 1731 return (WALK_ERR); 1732 1733 for (i = 0; i < TXG_SIZE; i++) { 1734 if (mdb_ctf_vread(&rt, "range_tree_t", 1735 "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1) 1736 return (WALK_ERR); 1737 1738 sd->ms_alloctree[i] += rt.rt_space; 1739 1740 if (mdb_ctf_vread(&rt, "range_tree_t", 1741 "mdb_range_tree_t", ms.ms_freetree[i], 0) == -1) 1742 return (WALK_ERR); 1743 1744 sd->ms_freetree[i] += rt.rt_space; 1745 } 1746 1747 if (mdb_ctf_vread(&rt, "range_tree_t", 1748 "mdb_range_tree_t", ms.ms_tree, 0) == -1) 1749 return (WALK_ERR); 1750 1751 if (ms.ms_sm != NULL && 1752 mdb_ctf_vread(&sm, "space_map_t", 1753 "mdb_space_map_t", ms.ms_sm, 0) == -1) 1754 return (WALK_ERR); 1755 1756 if (sm.sm_phys != NULL) { 1757 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 1758 "mdb_space_map_phys_t", sm.sm_phys, 0); 1759 } 1760 1761 sd->ms_tree += rt.rt_space; 1762 sd->avail += sm.sm_size - sm.sm_alloc; 1763 sd->nowavail += sm.sm_size - smp.smp_alloc; 1764 1765 return (WALK_NEXT); 1766 } 1767 1768 /* 1769 * ::spa_space [-b] 1770 * 1771 * Given a spa_t, print out it's on-disk space usage and in-core 1772 * estimates of future usage. If -b is given, print space in bytes. 1773 * Otherwise print in megabytes. 1774 */ 1775 /* ARGSUSED */ 1776 static int 1777 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1778 { 1779 mdb_spa_t spa; 1780 mdb_dsl_pool_t dp; 1781 mdb_dsl_dir_t dd; 1782 mdb_dmu_buf_impl_t db; 1783 mdb_dsl_dir_phys_t dsp; 1784 space_data_t sd; 1785 int shift = 20; 1786 char *suffix = "M"; 1787 int bytes = B_FALSE; 1788 1789 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != 1790 argc) 1791 return (DCMD_USAGE); 1792 if (!(flags & DCMD_ADDRSPEC)) 1793 return (DCMD_USAGE); 1794 1795 if (bytes) { 1796 shift = 0; 1797 suffix = ""; 1798 } 1799 1800 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t", 1801 addr, 0) == -1 || 1802 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t", 1803 spa.spa_dsl_pool, 0) == -1 || 1804 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t", 1805 dp.dp_root_dir, 0) == -1 || 1806 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 1807 dd.dd_dbuf, 0) == -1 || 1808 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys", 1809 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) { 1810 return (DCMD_ERR); 1811 } 1812 1813 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1814 dd.dd_space_towrite[0] >> shift, suffix, 1815 dd.dd_space_towrite[1] >> shift, suffix, 1816 dd.dd_space_towrite[2] >> shift, suffix, 1817 dd.dd_space_towrite[3] >> shift, suffix); 1818 1819 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1820 dsp.dd_used_bytes >> shift, suffix); 1821 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1822 dsp.dd_compressed_bytes >> shift, suffix); 1823 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1824 dsp.dd_uncompressed_bytes >> shift, suffix); 1825 1826 bzero(&sd, sizeof (sd)); 1827 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1828 mdb_warn("can't walk metaslabs"); 1829 return (DCMD_ERR); 1830 } 1831 1832 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1833 sd.ms_alloctree[0] >> shift, suffix, 1834 sd.ms_alloctree[1] >> shift, suffix, 1835 sd.ms_alloctree[2] >> shift, suffix, 1836 sd.ms_alloctree[3] >> shift, suffix); 1837 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1838 sd.ms_freetree[0] >> shift, suffix, 1839 sd.ms_freetree[1] >> shift, suffix, 1840 sd.ms_freetree[2] >> shift, suffix, 1841 sd.ms_freetree[3] >> shift, suffix); 1842 mdb_printf("ms_tree = %llu%s\n", sd.ms_tree >> shift, suffix); 1843 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1844 mdb_printf("current syncing avail = %llu%s\n", 1845 sd.nowavail >> shift, suffix); 1846 1847 return (DCMD_OK); 1848 } 1849 1850 typedef struct mdb_spa_aux_vdev { 1851 int sav_count; 1852 uintptr_t sav_vdevs; 1853 } mdb_spa_aux_vdev_t; 1854 1855 typedef struct mdb_spa_vdevs { 1856 uintptr_t spa_root_vdev; 1857 mdb_spa_aux_vdev_t spa_l2cache; 1858 mdb_spa_aux_vdev_t spa_spares; 1859 } mdb_spa_vdevs_t; 1860 1861 static int 1862 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 1863 const char *name) 1864 { 1865 uintptr_t *aux; 1866 size_t len; 1867 int ret, i; 1868 1869 /* 1870 * Iterate over aux vdevs and print those out as well. This is a 1871 * little annoying because we don't have a root vdev to pass to ::vdev. 1872 * Instead, we print a single line and then call it for each child 1873 * vdev. 1874 */ 1875 if (sav->sav_count != 0) { 1876 v[1].a_type = MDB_TYPE_STRING; 1877 v[1].a_un.a_str = "-d"; 1878 v[2].a_type = MDB_TYPE_IMMEDIATE; 1879 v[2].a_un.a_val = 2; 1880 1881 len = sav->sav_count * sizeof (uintptr_t); 1882 aux = mdb_alloc(len, UM_SLEEP); 1883 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) { 1884 mdb_free(aux, len); 1885 mdb_warn("failed to read l2cache vdevs at %p", 1886 sav->sav_vdevs); 1887 return (DCMD_ERR); 1888 } 1889 1890 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 1891 1892 for (i = 0; i < sav->sav_count; i++) { 1893 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 1894 if (ret != DCMD_OK) { 1895 mdb_free(aux, len); 1896 return (ret); 1897 } 1898 } 1899 1900 mdb_free(aux, len); 1901 } 1902 1903 return (0); 1904 } 1905 1906 /* 1907 * ::spa_vdevs 1908 * 1909 * -e Include error stats 1910 * -m Include metaslab information 1911 * -M Include metaslab group information 1912 * -h Include histogram information (requires -m or -M) 1913 * 1914 * Print out a summarized list of vdevs for the given spa_t. 1915 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 1916 * iterating over the cache devices. 1917 */ 1918 /* ARGSUSED */ 1919 static int 1920 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1921 { 1922 mdb_arg_t v[3]; 1923 int ret; 1924 char opts[100] = "-r"; 1925 int spa_flags = 0; 1926 1927 if (mdb_getopts(argc, argv, 1928 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1929 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1930 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1931 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1932 NULL) != argc) 1933 return (DCMD_USAGE); 1934 1935 if (!(flags & DCMD_ADDRSPEC)) 1936 return (DCMD_USAGE); 1937 1938 mdb_spa_vdevs_t spa; 1939 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1) 1940 return (DCMD_ERR); 1941 1942 /* 1943 * Unitialized spa_t structures can have a NULL root vdev. 1944 */ 1945 if (spa.spa_root_vdev == NULL) { 1946 mdb_printf("no associated vdevs\n"); 1947 return (DCMD_OK); 1948 } 1949 1950 if (spa_flags & SPA_FLAG_ERRORS) 1951 strcat(opts, "e"); 1952 if (spa_flags & SPA_FLAG_METASLABS) 1953 strcat(opts, "m"); 1954 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 1955 strcat(opts, "M"); 1956 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1957 strcat(opts, "h"); 1958 1959 v[0].a_type = MDB_TYPE_STRING; 1960 v[0].a_un.a_str = opts; 1961 1962 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1963 flags, 1, v); 1964 if (ret != DCMD_OK) 1965 return (ret); 1966 1967 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 1968 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 1969 return (DCMD_ERR); 1970 1971 return (DCMD_OK); 1972 } 1973 1974 /* 1975 * ::zio 1976 * 1977 * Print a summary of zio_t and all its children. This is intended to display a 1978 * zio tree, and hence we only pick the most important pieces of information for 1979 * the main summary. More detailed information can always be found by doing a 1980 * '::print zio' on the underlying zio_t. The columns we display are: 1981 * 1982 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED 1983 * 1984 * The 'address' column is indented by one space for each depth level as we 1985 * descend down the tree. 1986 */ 1987 1988 #define ZIO_MAXINDENT 7 1989 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 1990 #define ZIO_WALK_SELF 0 1991 #define ZIO_WALK_CHILD 1 1992 #define ZIO_WALK_PARENT 2 1993 1994 typedef struct zio_print_args { 1995 int zpa_current_depth; 1996 int zpa_min_depth; 1997 int zpa_max_depth; 1998 int zpa_type; 1999 uint_t zpa_flags; 2000 } zio_print_args_t; 2001 2002 typedef struct mdb_zio { 2003 enum zio_type io_type; 2004 enum zio_stage io_stage; 2005 uintptr_t io_waiter; 2006 uintptr_t io_spa; 2007 struct { 2008 struct { 2009 uintptr_t list_next; 2010 } list_head; 2011 } io_parent_list; 2012 int io_error; 2013 } mdb_zio_t; 2014 2015 typedef struct mdb_zio_timestamp { 2016 hrtime_t io_timestamp; 2017 } mdb_zio_timestamp_t; 2018 2019 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 2020 2021 static int 2022 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) 2023 { 2024 mdb_ctf_id_t type_enum, stage_enum; 2025 int indent = zpa->zpa_current_depth; 2026 const char *type, *stage; 2027 uintptr_t laddr; 2028 mdb_zio_t zio; 2029 mdb_zio_timestamp_t zio_timestamp = { 0 }; 2030 2031 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) 2032 return (WALK_ERR); 2033 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", 2034 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); 2035 2036 if (indent > ZIO_MAXINDENT) 2037 indent = ZIO_MAXINDENT; 2038 2039 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 2040 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 2041 mdb_warn("failed to lookup zio enums"); 2042 return (WALK_ERR); 2043 } 2044 2045 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) 2046 type += sizeof ("ZIO_TYPE_") - 1; 2047 else 2048 type = "?"; 2049 2050 if (zio.io_error == 0) { 2051 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); 2052 if (stage != NULL) 2053 stage += sizeof ("ZIO_STAGE_") - 1; 2054 else 2055 stage = "?"; 2056 } else { 2057 stage = "FAILED"; 2058 } 2059 2060 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 2061 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 2062 mdb_printf("%?p\n", addr); 2063 } else { 2064 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 2065 ZIO_MAXWIDTH - indent, addr, type, stage); 2066 if (zio.io_waiter != 0) 2067 mdb_printf("%-16lx ", zio.io_waiter); 2068 else 2069 mdb_printf("%-16s ", "-"); 2070 #ifdef _KERNEL 2071 if (zio_timestamp.io_timestamp != 0) { 2072 mdb_printf("%llums", (mdb_gethrtime() - 2073 zio_timestamp.io_timestamp) / 2074 1000000); 2075 } else { 2076 mdb_printf("%-12s ", "-"); 2077 } 2078 #else 2079 mdb_printf("%-12s ", "-"); 2080 #endif 2081 mdb_printf("\n"); 2082 } 2083 } 2084 2085 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 2086 return (WALK_NEXT); 2087 2088 if (zpa->zpa_type == ZIO_WALK_PARENT) 2089 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2090 "io_parent_list"); 2091 else 2092 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2093 "io_child_list"); 2094 2095 zpa->zpa_current_depth++; 2096 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 2097 mdb_warn("failed to walk zio_t children at %p\n", laddr); 2098 return (WALK_ERR); 2099 } 2100 zpa->zpa_current_depth--; 2101 2102 return (WALK_NEXT); 2103 } 2104 2105 /* ARGSUSED */ 2106 static int 2107 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 2108 { 2109 zio_link_t zl; 2110 uintptr_t ziop; 2111 zio_print_args_t *zpa = arg; 2112 2113 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 2114 mdb_warn("failed to read zio_link_t at %p", addr); 2115 return (WALK_ERR); 2116 } 2117 2118 if (zpa->zpa_type == ZIO_WALK_PARENT) 2119 ziop = (uintptr_t)zl.zl_parent; 2120 else 2121 ziop = (uintptr_t)zl.zl_child; 2122 2123 return (zio_print_cb(ziop, zpa)); 2124 } 2125 2126 /* ARGSUSED */ 2127 static int 2128 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2129 { 2130 zio_print_args_t zpa = { 0 }; 2131 2132 if (!(flags & DCMD_ADDRSPEC)) 2133 return (DCMD_USAGE); 2134 2135 if (mdb_getopts(argc, argv, 2136 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 2137 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 2138 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, 2139 NULL) != argc) 2140 return (DCMD_USAGE); 2141 2142 zpa.zpa_flags = flags; 2143 if (zpa.zpa_max_depth != 0) { 2144 if (zpa.zpa_type == ZIO_WALK_SELF) 2145 zpa.zpa_type = ZIO_WALK_CHILD; 2146 } else if (zpa.zpa_type != ZIO_WALK_SELF) { 2147 zpa.zpa_min_depth = 1; 2148 zpa.zpa_max_depth = 1; 2149 } 2150 2151 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 2152 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n", 2153 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", 2154 "TIME_ELAPSED"); 2155 } 2156 2157 if (zio_print_cb(addr, &zpa) != WALK_NEXT) 2158 return (DCMD_ERR); 2159 2160 return (DCMD_OK); 2161 } 2162 2163 /* 2164 * [addr]::zio_state 2165 * 2166 * Print a summary of all zio_t structures on the system, or for a particular 2167 * pool. This is equivalent to '::walk zio_root | ::zio'. 2168 */ 2169 /*ARGSUSED*/ 2170 static int 2171 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2172 { 2173 /* 2174 * MDB will remember the last address of the pipeline, so if we don't 2175 * zero this we'll end up trying to walk zio structures for a 2176 * non-existent spa_t. 2177 */ 2178 if (!(flags & DCMD_ADDRSPEC)) 2179 addr = 0; 2180 2181 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 2182 } 2183 2184 typedef struct txg_list_walk_data { 2185 uintptr_t lw_head[TXG_SIZE]; 2186 int lw_txgoff; 2187 int lw_maxoff; 2188 size_t lw_offset; 2189 void *lw_obj; 2190 } txg_list_walk_data_t; 2191 2192 static int 2193 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 2194 { 2195 txg_list_walk_data_t *lwd; 2196 txg_list_t list; 2197 int i; 2198 2199 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 2200 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 2201 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 2202 return (WALK_ERR); 2203 } 2204 2205 for (i = 0; i < TXG_SIZE; i++) 2206 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 2207 lwd->lw_offset = list.tl_offset; 2208 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 2209 UM_SLEEP | UM_GC); 2210 lwd->lw_txgoff = txg; 2211 lwd->lw_maxoff = maxoff; 2212 2213 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2214 wsp->walk_data = lwd; 2215 2216 return (WALK_NEXT); 2217 } 2218 2219 static int 2220 txg_list_walk_init(mdb_walk_state_t *wsp) 2221 { 2222 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 2223 } 2224 2225 static int 2226 txg_list0_walk_init(mdb_walk_state_t *wsp) 2227 { 2228 return (txg_list_walk_init_common(wsp, 0, 0)); 2229 } 2230 2231 static int 2232 txg_list1_walk_init(mdb_walk_state_t *wsp) 2233 { 2234 return (txg_list_walk_init_common(wsp, 1, 1)); 2235 } 2236 2237 static int 2238 txg_list2_walk_init(mdb_walk_state_t *wsp) 2239 { 2240 return (txg_list_walk_init_common(wsp, 2, 2)); 2241 } 2242 2243 static int 2244 txg_list3_walk_init(mdb_walk_state_t *wsp) 2245 { 2246 return (txg_list_walk_init_common(wsp, 3, 3)); 2247 } 2248 2249 static int 2250 txg_list_walk_step(mdb_walk_state_t *wsp) 2251 { 2252 txg_list_walk_data_t *lwd = wsp->walk_data; 2253 uintptr_t addr; 2254 txg_node_t *node; 2255 int status; 2256 2257 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 2258 lwd->lw_txgoff++; 2259 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2260 } 2261 2262 if (wsp->walk_addr == NULL) 2263 return (WALK_DONE); 2264 2265 addr = wsp->walk_addr - lwd->lw_offset; 2266 2267 if (mdb_vread(lwd->lw_obj, 2268 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 2269 mdb_warn("failed to read list element at %#lx", addr); 2270 return (WALK_ERR); 2271 } 2272 2273 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 2274 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 2275 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 2276 2277 return (status); 2278 } 2279 2280 /* 2281 * ::walk spa 2282 * 2283 * Walk all named spa_t structures in the namespace. This is nothing more than 2284 * a layered avl walk. 2285 */ 2286 static int 2287 spa_walk_init(mdb_walk_state_t *wsp) 2288 { 2289 GElf_Sym sym; 2290 2291 if (wsp->walk_addr != NULL) { 2292 mdb_warn("spa walk only supports global walks\n"); 2293 return (WALK_ERR); 2294 } 2295 2296 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 2297 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 2298 return (WALK_ERR); 2299 } 2300 2301 wsp->walk_addr = (uintptr_t)sym.st_value; 2302 2303 if (mdb_layered_walk("avl", wsp) == -1) { 2304 mdb_warn("failed to walk 'avl'\n"); 2305 return (WALK_ERR); 2306 } 2307 2308 return (WALK_NEXT); 2309 } 2310 2311 static int 2312 spa_walk_step(mdb_walk_state_t *wsp) 2313 { 2314 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata)); 2315 } 2316 2317 /* 2318 * [addr]::walk zio 2319 * 2320 * Walk all active zio_t structures on the system. This is simply a layered 2321 * walk on top of ::walk zio_cache, with the optional ability to limit the 2322 * structures to a particular pool. 2323 */ 2324 static int 2325 zio_walk_init(mdb_walk_state_t *wsp) 2326 { 2327 wsp->walk_data = (void *)wsp->walk_addr; 2328 2329 if (mdb_layered_walk("zio_cache", wsp) == -1) { 2330 mdb_warn("failed to walk 'zio_cache'\n"); 2331 return (WALK_ERR); 2332 } 2333 2334 return (WALK_NEXT); 2335 } 2336 2337 static int 2338 zio_walk_step(mdb_walk_state_t *wsp) 2339 { 2340 mdb_zio_t zio; 2341 uintptr_t spa = (uintptr_t)wsp->walk_data; 2342 2343 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2344 wsp->walk_addr, 0) == -1) 2345 return (WALK_ERR); 2346 2347 if (spa != 0 && spa != zio.io_spa) 2348 return (WALK_NEXT); 2349 2350 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2351 } 2352 2353 /* 2354 * [addr]::walk zio_root 2355 * 2356 * Walk only root zio_t structures, optionally for a particular spa_t. 2357 */ 2358 static int 2359 zio_walk_root_step(mdb_walk_state_t *wsp) 2360 { 2361 mdb_zio_t zio; 2362 uintptr_t spa = (uintptr_t)wsp->walk_data; 2363 2364 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2365 wsp->walk_addr, 0) == -1) 2366 return (WALK_ERR); 2367 2368 if (spa != 0 && spa != zio.io_spa) 2369 return (WALK_NEXT); 2370 2371 /* If the parent list is not empty, ignore */ 2372 if (zio.io_parent_list.list_head.list_next != 2373 wsp->walk_addr + 2374 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + 2375 mdb_ctf_offsetof_by_name("struct list", "list_head")) 2376 return (WALK_NEXT); 2377 2378 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2379 } 2380 2381 /* 2382 * ::zfs_blkstats 2383 * 2384 * -v print verbose per-level information 2385 * 2386 */ 2387 static int 2388 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2389 { 2390 boolean_t verbose = B_FALSE; 2391 zfs_all_blkstats_t stats; 2392 dmu_object_type_t t; 2393 zfs_blkstat_t *tzb; 2394 uint64_t ditto; 2395 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; 2396 /* +10 in case it grew */ 2397 2398 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { 2399 mdb_warn("failed to read 'dmu_ot'"); 2400 return (DCMD_ERR); 2401 } 2402 2403 if (mdb_getopts(argc, argv, 2404 'v', MDB_OPT_SETBITS, TRUE, &verbose, 2405 NULL) != argc) 2406 return (DCMD_USAGE); 2407 2408 if (!(flags & DCMD_ADDRSPEC)) 2409 return (DCMD_USAGE); 2410 2411 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || 2412 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || 2413 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 2414 mdb_warn("failed to read data at %p;", addr); 2415 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 2416 return (DCMD_ERR); 2417 } 2418 2419 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 2420 if (tzb->zb_gangs != 0) { 2421 mdb_printf("Ganged blocks: %llu\n", 2422 (longlong_t)tzb->zb_gangs); 2423 } 2424 2425 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 2426 tzb->zb_ditto_3_of_3_samevdev; 2427 if (ditto != 0) { 2428 mdb_printf("Dittoed blocks on same vdev: %llu\n", 2429 (longlong_t)ditto); 2430 } 2431 2432 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 2433 "\t avg\t comp\t%%Total\tType\n"); 2434 2435 for (t = 0; t <= DMU_OT_TOTAL; t++) { 2436 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; 2437 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; 2438 char avg[NICENUM_BUFLEN]; 2439 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; 2440 char typename[64]; 2441 int l; 2442 2443 2444 if (t == DMU_OT_DEFERRED) 2445 strcpy(typename, "deferred free"); 2446 else if (t == DMU_OT_OTHER) 2447 strcpy(typename, "other"); 2448 else if (t == DMU_OT_TOTAL) 2449 strcpy(typename, "Total"); 2450 else if (mdb_readstr(typename, sizeof (typename), 2451 (uintptr_t)dmu_ot[t].ot_name) == -1) { 2452 mdb_warn("failed to read type name"); 2453 return (DCMD_ERR); 2454 } 2455 2456 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 2457 continue; 2458 2459 for (l = -1; l < DN_MAX_LEVELS; l++) { 2460 int level = (l == -1 ? DN_MAX_LEVELS : l); 2461 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 2462 2463 if (zb->zb_asize == 0) 2464 continue; 2465 2466 /* 2467 * Don't print each level unless requested. 2468 */ 2469 if (!verbose && level != DN_MAX_LEVELS) 2470 continue; 2471 2472 /* 2473 * If all the space is level 0, don't print the 2474 * level 0 separately. 2475 */ 2476 if (level == 0 && zb->zb_asize == 2477 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 2478 continue; 2479 2480 mdb_nicenum(zb->zb_count, csize); 2481 mdb_nicenum(zb->zb_lsize, lsize); 2482 mdb_nicenum(zb->zb_psize, psize); 2483 mdb_nicenum(zb->zb_asize, asize); 2484 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 2485 (void) snprintfrac(comp, NICENUM_BUFLEN, 2486 zb->zb_lsize, zb->zb_psize, 2); 2487 (void) snprintfrac(pct, NICENUM_BUFLEN, 2488 100 * zb->zb_asize, tzb->zb_asize, 2); 2489 2490 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 2491 "\t%5s\t%6s\t", 2492 csize, lsize, psize, asize, avg, comp, pct); 2493 2494 if (level == DN_MAX_LEVELS) 2495 mdb_printf("%s\n", typename); 2496 else 2497 mdb_printf(" L%d %s\n", 2498 level, typename); 2499 } 2500 } 2501 2502 return (DCMD_OK); 2503 } 2504 2505 typedef struct mdb_reference { 2506 uintptr_t ref_holder; 2507 uintptr_t ref_removed; 2508 uint64_t ref_number; 2509 } mdb_reference_t; 2510 2511 /* ARGSUSED */ 2512 static int 2513 reference_cb(uintptr_t addr, const void *ignored, void *arg) 2514 { 2515 mdb_reference_t ref; 2516 boolean_t holder_is_str = B_FALSE; 2517 char holder_str[128]; 2518 boolean_t removed = (boolean_t)arg; 2519 2520 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr, 2521 0) == -1) 2522 return (DCMD_ERR); 2523 2524 if (mdb_readstr(holder_str, sizeof (holder_str), 2525 ref.ref_holder) != -1) 2526 holder_is_str = strisprint(holder_str); 2527 2528 if (removed) 2529 mdb_printf("removed "); 2530 mdb_printf("reference "); 2531 if (ref.ref_number != 1) 2532 mdb_printf("with count=%llu ", ref.ref_number); 2533 mdb_printf("with tag %lx", ref.ref_holder); 2534 if (holder_is_str) 2535 mdb_printf(" \"%s\"", holder_str); 2536 mdb_printf(", held at:\n"); 2537 2538 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 2539 2540 if (removed) { 2541 mdb_printf("removed at:\n"); 2542 (void) mdb_call_dcmd("whatis", ref.ref_removed, 2543 DCMD_ADDRSPEC, 0, NULL); 2544 } 2545 2546 mdb_printf("\n"); 2547 2548 return (WALK_NEXT); 2549 } 2550 2551 typedef struct mdb_refcount { 2552 uint64_t rc_count; 2553 } mdb_refcount_t; 2554 2555 typedef struct mdb_refcount_removed { 2556 uint64_t rc_removed_count; 2557 } mdb_refcount_removed_t; 2558 2559 typedef struct mdb_refcount_tracked { 2560 boolean_t rc_tracked; 2561 } mdb_refcount_tracked_t; 2562 2563 /* ARGSUSED */ 2564 static int 2565 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2566 { 2567 mdb_refcount_t rc; 2568 mdb_refcount_removed_t rcr; 2569 mdb_refcount_tracked_t rct; 2570 int off; 2571 boolean_t released = B_FALSE; 2572 2573 if (!(flags & DCMD_ADDRSPEC)) 2574 return (DCMD_USAGE); 2575 2576 if (mdb_getopts(argc, argv, 2577 'r', MDB_OPT_SETBITS, B_TRUE, &released, 2578 NULL) != argc) 2579 return (DCMD_USAGE); 2580 2581 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr, 2582 0) == -1) 2583 return (DCMD_ERR); 2584 2585 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr, 2586 MDB_CTF_VREAD_QUIET) == -1) { 2587 mdb_printf("refcount_t at %p has %llu holds (untracked)\n", 2588 addr, (longlong_t)rc.rc_count); 2589 return (DCMD_OK); 2590 } 2591 2592 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr, 2593 MDB_CTF_VREAD_QUIET) == -1) { 2594 /* If this is an old target, it might be tracked. */ 2595 rct.rc_tracked = B_TRUE; 2596 } 2597 2598 mdb_printf("refcount_t at %p has %llu current holds, " 2599 "%llu recently released holds\n", 2600 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count); 2601 2602 if (rct.rc_tracked && rc.rc_count > 0) 2603 mdb_printf("current holds:\n"); 2604 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list"); 2605 if (off == -1) 2606 return (DCMD_ERR); 2607 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 2608 2609 if (released && rcr.rc_removed_count > 0) { 2610 mdb_printf("released holds:\n"); 2611 2612 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed"); 2613 if (off == -1) 2614 return (DCMD_ERR); 2615 mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off); 2616 } 2617 2618 return (DCMD_OK); 2619 } 2620 2621 /* ARGSUSED */ 2622 static int 2623 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2624 { 2625 sa_attr_table_t *table; 2626 sa_os_t sa_os; 2627 char *name; 2628 int i; 2629 2630 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 2631 mdb_warn("failed to read sa_os at %p", addr); 2632 return (DCMD_ERR); 2633 } 2634 2635 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2636 UM_SLEEP | UM_GC); 2637 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 2638 2639 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2640 (uintptr_t)sa_os.sa_attr_table) == -1) { 2641 mdb_warn("failed to read sa_os at %p", addr); 2642 return (DCMD_ERR); 2643 } 2644 2645 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 2646 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 2647 for (i = 0; i != sa_os.sa_num_attrs; i++) { 2648 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 2649 mdb_printf("%5x %8x %8x %8x %-s\n", 2650 (int)table[i].sa_attr, (int)table[i].sa_registered, 2651 (int)table[i].sa_length, table[i].sa_byteswap, name); 2652 } 2653 2654 return (DCMD_OK); 2655 } 2656 2657 static int 2658 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 2659 { 2660 uintptr_t idx_table; 2661 2662 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { 2663 mdb_printf("can't find offset table in sa_idx_tab\n"); 2664 return (-1); 2665 } 2666 2667 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 2668 UM_SLEEP | UM_GC); 2669 2670 if (mdb_vread(*off_tab, 2671 attr_count * sizeof (uint32_t), idx_table) == -1) { 2672 mdb_warn("failed to attribute offset table %p", idx_table); 2673 return (-1); 2674 } 2675 2676 return (DCMD_OK); 2677 } 2678 2679 /*ARGSUSED*/ 2680 static int 2681 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2682 { 2683 uint32_t *offset_tab; 2684 int attr_count; 2685 uint64_t attr_id; 2686 uintptr_t attr_addr; 2687 uintptr_t bonus_tab, spill_tab; 2688 uintptr_t db_bonus, db_spill; 2689 uintptr_t os, os_sa; 2690 uintptr_t db_data; 2691 2692 if (argc != 1) 2693 return (DCMD_USAGE); 2694 2695 if (argv[0].a_type == MDB_TYPE_STRING) 2696 attr_id = mdb_strtoull(argv[0].a_un.a_str); 2697 else 2698 return (DCMD_USAGE); 2699 2700 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || 2701 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || 2702 GETMEMB(addr, "sa_handle", sa_os, os) || 2703 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || 2704 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { 2705 mdb_printf("Can't find necessary information in sa_handle " 2706 "in sa_handle\n"); 2707 return (DCMD_ERR); 2708 } 2709 2710 if (GETMEMB(os, "objset", os_sa, os_sa)) { 2711 mdb_printf("Can't find os_sa in objset\n"); 2712 return (DCMD_ERR); 2713 } 2714 2715 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { 2716 mdb_printf("Can't find sa_num_attrs\n"); 2717 return (DCMD_ERR); 2718 } 2719 2720 if (attr_id > attr_count) { 2721 mdb_printf("attribute id number is out of range\n"); 2722 return (DCMD_ERR); 2723 } 2724 2725 if (bonus_tab) { 2726 if (sa_get_off_table(bonus_tab, &offset_tab, 2727 attr_count) == -1) { 2728 return (DCMD_ERR); 2729 } 2730 2731 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { 2732 mdb_printf("can't find db_data in bonus dbuf\n"); 2733 return (DCMD_ERR); 2734 } 2735 } 2736 2737 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 2738 spill_tab == NULL) { 2739 mdb_printf("Attribute does not exist\n"); 2740 return (DCMD_ERR); 2741 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 2742 if (sa_get_off_table(spill_tab, &offset_tab, 2743 attr_count) == -1) { 2744 return (DCMD_ERR); 2745 } 2746 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { 2747 mdb_printf("can't find db_data in spill dbuf\n"); 2748 return (DCMD_ERR); 2749 } 2750 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 2751 mdb_printf("Attribute does not exist\n"); 2752 return (DCMD_ERR); 2753 } 2754 } 2755 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 2756 mdb_printf("%p\n", attr_addr); 2757 return (DCMD_OK); 2758 } 2759 2760 /* ARGSUSED */ 2761 static int 2762 zfs_ace_print_common(uintptr_t addr, uint_t flags, 2763 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 2764 uint16_t ace_type, int verbose) 2765 { 2766 if (DCMD_HDRSPEC(flags) && !verbose) 2767 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 2768 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 2769 2770 if (!verbose) { 2771 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 2772 ace_flags, access_mask, ace_type, id); 2773 return (DCMD_OK); 2774 } 2775 2776 switch (ace_flags & ACE_TYPE_FLAGS) { 2777 case ACE_OWNER: 2778 mdb_printf("owner@:"); 2779 break; 2780 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2781 mdb_printf("group@:"); 2782 break; 2783 case ACE_EVERYONE: 2784 mdb_printf("everyone@:"); 2785 break; 2786 case ACE_IDENTIFIER_GROUP: 2787 mdb_printf("group:%llx:", (u_longlong_t)id); 2788 break; 2789 case 0: /* User entry */ 2790 mdb_printf("user:%llx:", (u_longlong_t)id); 2791 break; 2792 } 2793 2794 /* print out permission mask */ 2795 if (access_mask & ACE_READ_DATA) 2796 mdb_printf("r"); 2797 else 2798 mdb_printf("-"); 2799 if (access_mask & ACE_WRITE_DATA) 2800 mdb_printf("w"); 2801 else 2802 mdb_printf("-"); 2803 if (access_mask & ACE_EXECUTE) 2804 mdb_printf("x"); 2805 else 2806 mdb_printf("-"); 2807 if (access_mask & ACE_APPEND_DATA) 2808 mdb_printf("p"); 2809 else 2810 mdb_printf("-"); 2811 if (access_mask & ACE_DELETE) 2812 mdb_printf("d"); 2813 else 2814 mdb_printf("-"); 2815 if (access_mask & ACE_DELETE_CHILD) 2816 mdb_printf("D"); 2817 else 2818 mdb_printf("-"); 2819 if (access_mask & ACE_READ_ATTRIBUTES) 2820 mdb_printf("a"); 2821 else 2822 mdb_printf("-"); 2823 if (access_mask & ACE_WRITE_ATTRIBUTES) 2824 mdb_printf("A"); 2825 else 2826 mdb_printf("-"); 2827 if (access_mask & ACE_READ_NAMED_ATTRS) 2828 mdb_printf("R"); 2829 else 2830 mdb_printf("-"); 2831 if (access_mask & ACE_WRITE_NAMED_ATTRS) 2832 mdb_printf("W"); 2833 else 2834 mdb_printf("-"); 2835 if (access_mask & ACE_READ_ACL) 2836 mdb_printf("c"); 2837 else 2838 mdb_printf("-"); 2839 if (access_mask & ACE_WRITE_ACL) 2840 mdb_printf("C"); 2841 else 2842 mdb_printf("-"); 2843 if (access_mask & ACE_WRITE_OWNER) 2844 mdb_printf("o"); 2845 else 2846 mdb_printf("-"); 2847 if (access_mask & ACE_SYNCHRONIZE) 2848 mdb_printf("s"); 2849 else 2850 mdb_printf("-"); 2851 2852 mdb_printf(":"); 2853 2854 /* Print out inheritance flags */ 2855 if (ace_flags & ACE_FILE_INHERIT_ACE) 2856 mdb_printf("f"); 2857 else 2858 mdb_printf("-"); 2859 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 2860 mdb_printf("d"); 2861 else 2862 mdb_printf("-"); 2863 if (ace_flags & ACE_INHERIT_ONLY_ACE) 2864 mdb_printf("i"); 2865 else 2866 mdb_printf("-"); 2867 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 2868 mdb_printf("n"); 2869 else 2870 mdb_printf("-"); 2871 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 2872 mdb_printf("S"); 2873 else 2874 mdb_printf("-"); 2875 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 2876 mdb_printf("F"); 2877 else 2878 mdb_printf("-"); 2879 if (ace_flags & ACE_INHERITED_ACE) 2880 mdb_printf("I"); 2881 else 2882 mdb_printf("-"); 2883 2884 switch (ace_type) { 2885 case ACE_ACCESS_ALLOWED_ACE_TYPE: 2886 mdb_printf(":allow\n"); 2887 break; 2888 case ACE_ACCESS_DENIED_ACE_TYPE: 2889 mdb_printf(":deny\n"); 2890 break; 2891 case ACE_SYSTEM_AUDIT_ACE_TYPE: 2892 mdb_printf(":audit\n"); 2893 break; 2894 case ACE_SYSTEM_ALARM_ACE_TYPE: 2895 mdb_printf(":alarm\n"); 2896 break; 2897 default: 2898 mdb_printf(":?\n"); 2899 } 2900 return (DCMD_OK); 2901 } 2902 2903 /* ARGSUSED */ 2904 static int 2905 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2906 { 2907 zfs_ace_t zace; 2908 int verbose = FALSE; 2909 uint64_t id; 2910 2911 if (!(flags & DCMD_ADDRSPEC)) 2912 return (DCMD_USAGE); 2913 2914 if (mdb_getopts(argc, argv, 2915 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2916 return (DCMD_USAGE); 2917 2918 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 2919 mdb_warn("failed to read zfs_ace_t"); 2920 return (DCMD_ERR); 2921 } 2922 2923 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 2924 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2925 id = zace.z_fuid; 2926 else 2927 id = -1; 2928 2929 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 2930 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 2931 } 2932 2933 /* ARGSUSED */ 2934 static int 2935 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2936 { 2937 ace_t ace; 2938 uint64_t id; 2939 int verbose = FALSE; 2940 2941 if (!(flags & DCMD_ADDRSPEC)) 2942 return (DCMD_USAGE); 2943 2944 if (mdb_getopts(argc, argv, 2945 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2946 return (DCMD_USAGE); 2947 2948 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 2949 mdb_warn("failed to read ace_t"); 2950 return (DCMD_ERR); 2951 } 2952 2953 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 2954 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2955 id = ace.a_who; 2956 else 2957 id = -1; 2958 2959 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 2960 ace.a_flags, ace.a_type, verbose)); 2961 } 2962 2963 typedef struct acl_dump_args { 2964 int a_argc; 2965 const mdb_arg_t *a_argv; 2966 uint16_t a_version; 2967 int a_flags; 2968 } acl_dump_args_t; 2969 2970 /* ARGSUSED */ 2971 static int 2972 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 2973 { 2974 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2975 2976 if (acl_args->a_version == 1) { 2977 if (mdb_call_dcmd("zfs_ace", addr, 2978 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2979 acl_args->a_argv) != DCMD_OK) { 2980 return (WALK_ERR); 2981 } 2982 } else { 2983 if (mdb_call_dcmd("zfs_ace0", addr, 2984 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2985 acl_args->a_argv) != DCMD_OK) { 2986 return (WALK_ERR); 2987 } 2988 } 2989 acl_args->a_flags = DCMD_LOOP; 2990 return (WALK_NEXT); 2991 } 2992 2993 /* ARGSUSED */ 2994 static int 2995 acl_cb(uintptr_t addr, const void *unknown, void *arg) 2996 { 2997 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2998 2999 if (acl_args->a_version == 1) { 3000 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 3001 arg, addr) != 0) { 3002 mdb_warn("can't walk ACEs"); 3003 return (DCMD_ERR); 3004 } 3005 } else { 3006 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 3007 arg, addr) != 0) { 3008 mdb_warn("can't walk ACEs"); 3009 return (DCMD_ERR); 3010 } 3011 } 3012 return (WALK_NEXT); 3013 } 3014 3015 /* ARGSUSED */ 3016 static int 3017 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3018 { 3019 zfs_acl_t zacl; 3020 int verbose = FALSE; 3021 acl_dump_args_t acl_args; 3022 3023 if (!(flags & DCMD_ADDRSPEC)) 3024 return (DCMD_USAGE); 3025 3026 if (mdb_getopts(argc, argv, 3027 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3028 return (DCMD_USAGE); 3029 3030 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 3031 mdb_warn("failed to read zfs_acl_t"); 3032 return (DCMD_ERR); 3033 } 3034 3035 acl_args.a_argc = argc; 3036 acl_args.a_argv = argv; 3037 acl_args.a_version = zacl.z_version; 3038 acl_args.a_flags = DCMD_LOOPFIRST; 3039 3040 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 3041 mdb_warn("can't walk ACL"); 3042 return (DCMD_ERR); 3043 } 3044 3045 return (DCMD_OK); 3046 } 3047 3048 /* ARGSUSED */ 3049 static int 3050 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 3051 { 3052 if (wsp->walk_addr == NULL) { 3053 mdb_warn("must supply address of zfs_acl_node_t\n"); 3054 return (WALK_ERR); 3055 } 3056 3057 wsp->walk_addr += 3058 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); 3059 3060 if (mdb_layered_walk("list", wsp) == -1) { 3061 mdb_warn("failed to walk 'list'\n"); 3062 return (WALK_ERR); 3063 } 3064 3065 return (WALK_NEXT); 3066 } 3067 3068 static int 3069 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 3070 { 3071 zfs_acl_node_t aclnode; 3072 3073 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 3074 wsp->walk_addr) == -1) { 3075 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 3076 return (WALK_ERR); 3077 } 3078 3079 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 3080 } 3081 3082 typedef struct ace_walk_data { 3083 int ace_count; 3084 int ace_version; 3085 } ace_walk_data_t; 3086 3087 static int 3088 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 3089 int ace_count, uintptr_t ace_data) 3090 { 3091 ace_walk_data_t *ace_walk_data; 3092 3093 if (wsp->walk_addr == NULL) { 3094 mdb_warn("must supply address of zfs_acl_node_t\n"); 3095 return (WALK_ERR); 3096 } 3097 3098 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 3099 3100 ace_walk_data->ace_count = ace_count; 3101 ace_walk_data->ace_version = version; 3102 3103 wsp->walk_addr = ace_data; 3104 wsp->walk_data = ace_walk_data; 3105 3106 return (WALK_NEXT); 3107 } 3108 3109 static int 3110 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 3111 { 3112 static int gotid; 3113 static mdb_ctf_id_t acl_id; 3114 int z_ace_count; 3115 uintptr_t z_acldata; 3116 3117 if (!gotid) { 3118 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 3119 &acl_id) == -1) { 3120 mdb_warn("couldn't find struct zfs_acl_node"); 3121 return (DCMD_ERR); 3122 } 3123 gotid = TRUE; 3124 } 3125 3126 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 3127 return (DCMD_ERR); 3128 } 3129 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 3130 return (DCMD_ERR); 3131 } 3132 3133 return (zfs_aces_walk_init_common(wsp, version, 3134 z_ace_count, z_acldata)); 3135 } 3136 3137 /* ARGSUSED */ 3138 static int 3139 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 3140 { 3141 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 3142 } 3143 3144 /* ARGSUSED */ 3145 static int 3146 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 3147 { 3148 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 3149 } 3150 3151 static int 3152 zfs_aces_walk_step(mdb_walk_state_t *wsp) 3153 { 3154 ace_walk_data_t *ace_data = wsp->walk_data; 3155 zfs_ace_t zace; 3156 ace_t *acep; 3157 int status; 3158 int entry_type; 3159 int allow_type; 3160 uintptr_t ptr; 3161 3162 if (ace_data->ace_count == 0) 3163 return (WALK_DONE); 3164 3165 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 3166 mdb_warn("failed to read zfs_ace_t at %#lx", 3167 wsp->walk_addr); 3168 return (WALK_ERR); 3169 } 3170 3171 switch (ace_data->ace_version) { 3172 case 0: 3173 acep = (ace_t *)&zace; 3174 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 3175 allow_type = acep->a_type; 3176 break; 3177 case 1: 3178 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 3179 allow_type = zace.z_hdr.z_type; 3180 break; 3181 default: 3182 return (WALK_ERR); 3183 } 3184 3185 ptr = (uintptr_t)wsp->walk_addr; 3186 switch (entry_type) { 3187 case ACE_OWNER: 3188 case ACE_EVERYONE: 3189 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 3190 ptr += ace_data->ace_version == 0 ? 3191 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 3192 break; 3193 case ACE_IDENTIFIER_GROUP: 3194 default: 3195 switch (allow_type) { 3196 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 3197 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 3198 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 3199 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 3200 ptr += ace_data->ace_version == 0 ? 3201 sizeof (ace_t) : sizeof (zfs_object_ace_t); 3202 break; 3203 default: 3204 ptr += ace_data->ace_version == 0 ? 3205 sizeof (ace_t) : sizeof (zfs_ace_t); 3206 break; 3207 } 3208 } 3209 3210 ace_data->ace_count--; 3211 status = wsp->walk_callback(wsp->walk_addr, 3212 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 3213 3214 wsp->walk_addr = ptr; 3215 return (status); 3216 } 3217 3218 typedef struct mdb_zfs_rrwlock { 3219 uintptr_t rr_writer; 3220 boolean_t rr_writer_wanted; 3221 } mdb_zfs_rrwlock_t; 3222 3223 static uint_t rrw_key; 3224 3225 /* ARGSUSED */ 3226 static int 3227 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3228 { 3229 mdb_zfs_rrwlock_t rrw; 3230 3231 if (rrw_key == 0) { 3232 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) 3233 return (DCMD_ERR); 3234 } 3235 3236 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 3237 0) == -1) 3238 return (DCMD_ERR); 3239 3240 if (rrw.rr_writer != 0) { 3241 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer); 3242 return (DCMD_OK); 3243 } 3244 3245 if (rrw.rr_writer_wanted) { 3246 mdb_printf("writer wanted\n"); 3247 } 3248 3249 mdb_printf("anonymous references:\n"); 3250 (void) mdb_call_dcmd("refcount", addr + 3251 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), 3252 DCMD_ADDRSPEC, 0, NULL); 3253 3254 mdb_printf("linked references:\n"); 3255 (void) mdb_call_dcmd("refcount", addr + 3256 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), 3257 DCMD_ADDRSPEC, 0, NULL); 3258 3259 /* 3260 * XXX This should find references from 3261 * "::walk thread | ::tsd -v <rrw_key>", but there is no support 3262 * for programmatic consumption of dcmds, so this would be 3263 * difficult, potentially requiring reimplementing ::tsd (both 3264 * user and kernel versions) in this MDB module. 3265 */ 3266 3267 return (DCMD_OK); 3268 } 3269 3270 /* 3271 * MDB module linkage information: 3272 * 3273 * We declare a list of structures describing our dcmds, and a function 3274 * named _mdb_init to return a pointer to our module information. 3275 */ 3276 3277 static const mdb_dcmd_t dcmds[] = { 3278 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 3279 { "blkptr", ":", "print blkptr_t", blkptr }, 3280 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 3281 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 3282 { "dbufs", 3283 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 3284 "[-o object | \"mdn\"] \n" 3285 "\t[-l level] [-b blkid | \"bonus\"]", 3286 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 3287 { "abuf_find", "dva_word[0] dva_word[1]", 3288 "find arc_buf_hdr_t of a specified DVA", 3289 abuf_find }, 3290 { "spa", "?[-cevmMh]\n" 3291 "\t-c display spa config\n" 3292 "\t-e display vdev statistics\n" 3293 "\t-v display vdev information\n" 3294 "\t-m display metaslab statistics\n" 3295 "\t-M display metaslab group statistics\n" 3296 "\t-h display histogram (requires -m or -M)\n", 3297 "spa_t summary", spa_print }, 3298 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 3299 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 3300 { "spa_vdevs", ":[-emMh]\n" 3301 "\t-e display vdev statistics\n" 3302 "\t-m dispaly metaslab statistics\n" 3303 "\t-M display metaslab group statistic\n" 3304 "\t-h display histogram (requires -m or -M)\n", 3305 "given a spa_t, print vdev summary", spa_vdevs }, 3306 { "vdev", ":[-re]\n" 3307 "\t-r display recursively\n" 3308 "\t-e display statistics\n" 3309 "\t-m display metaslab statistics\n" 3310 "\t-M display metaslab group statistics\n" 3311 "\t-h display histogram (requires -m or -M)\n", 3312 "vdev_t summary", vdev_print }, 3313 { "zio", ":[-cpr]\n" 3314 "\t-c display children\n" 3315 "\t-p display parents\n" 3316 "\t-r display recursively", 3317 "zio_t summary", zio_print }, 3318 { "zio_state", "?", "print out all zio_t structures on system or " 3319 "for a particular pool", zio_state }, 3320 { "zfs_blkstats", ":[-v]", 3321 "given a spa_t, print block type stats from last scrub", 3322 zfs_blkstats }, 3323 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 3324 { "refcount", ":[-r]\n" 3325 "\t-r display recently removed references", 3326 "print refcount_t holders", refcount }, 3327 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 3328 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 3329 zfs_acl_dump }, 3330 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 3331 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 3332 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 3333 sa_attr_table}, 3334 { "sa_attr", ": attr_id", 3335 "print SA attribute address when given sa_handle_t", sa_attr_print}, 3336 { "zfs_dbgmsg", ":[-va]", 3337 "print zfs debug log", dbgmsg}, 3338 { "rrwlock", ":", 3339 "print rrwlock_t, including readers", rrwlock}, 3340 { NULL } 3341 }; 3342 3343 static const mdb_walker_t walkers[] = { 3344 { "zms_freelist", "walk ZFS metaslab freelist", 3345 freelist_walk_init, freelist_walk_step, NULL }, 3346 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 3347 txg_list_walk_init, txg_list_walk_step, NULL }, 3348 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 3349 txg_list0_walk_init, txg_list_walk_step, NULL }, 3350 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 3351 txg_list1_walk_init, txg_list_walk_step, NULL }, 3352 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 3353 txg_list2_walk_init, txg_list_walk_step, NULL }, 3354 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 3355 txg_list3_walk_init, txg_list_walk_step, NULL }, 3356 { "zio", "walk all zio structures, optionally for a particular spa_t", 3357 zio_walk_init, zio_walk_step, NULL }, 3358 { "zio_root", 3359 "walk all root zio_t structures, optionally for a particular spa_t", 3360 zio_walk_init, zio_walk_root_step, NULL }, 3361 { "spa", "walk all spa_t entries in the namespace", 3362 spa_walk_init, spa_walk_step, NULL }, 3363 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 3364 metaslab_walk_init, metaslab_walk_step, NULL }, 3365 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 3366 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 3367 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 3368 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 3369 { "zfs_acl_node_aces0", 3370 "given a zfs_acl_node_t, walk all ACEs as ace_t", 3371 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 3372 { NULL } 3373 }; 3374 3375 static const mdb_modinfo_t modinfo = { 3376 MDB_API_VERSION, dcmds, walkers 3377 }; 3378 3379 const mdb_modinfo_t * 3380 _mdb_init(void) 3381 { 3382 return (&modinfo); 3383 } 3384