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