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