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