1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 25 */ 26 27 /* Portions Copyright 2010 Robert Milkowski */ 28 29 #include <mdb/mdb_ctf.h> 30 #include <sys/zfs_context.h> 31 #include <sys/mdb_modapi.h> 32 #include <sys/dbuf.h> 33 #include <sys/dmu_objset.h> 34 #include <sys/dsl_dir.h> 35 #include <sys/dsl_pool.h> 36 #include <sys/metaslab_impl.h> 37 #include <sys/space_map.h> 38 #include <sys/list.h> 39 #include <sys/vdev_impl.h> 40 #include <sys/zap_leaf.h> 41 #include <sys/zap_impl.h> 42 #include <ctype.h> 43 #include <sys/zfs_acl.h> 44 #include <sys/sa_impl.h> 45 46 #ifdef _KERNEL 47 #define ZFS_OBJ_NAME "zfs" 48 extern int64_t mdb_gethrtime(void); 49 #else 50 #define ZFS_OBJ_NAME "libzpool.so.1" 51 #endif 52 53 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`" 54 55 #ifndef _KERNEL 56 int aok; 57 #endif 58 59 enum spa_flags { 60 SPA_FLAG_CONFIG = 1 << 0, 61 SPA_FLAG_VDEVS = 1 << 1, 62 SPA_FLAG_ERRORS = 1 << 2, 63 SPA_FLAG_METASLAB_GROUPS = 1 << 3, 64 SPA_FLAG_METASLABS = 1 << 4, 65 SPA_FLAG_HISTOGRAMS = 1 << 5 66 }; 67 68 #define SPA_FLAG_ALL_VDEV \ 69 (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \ 70 SPA_FLAG_METASLABS | SPA_FLAG_HISTOGRAMS) 71 72 static int 73 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp, 74 const char *member, int len, void *buf) 75 { 76 mdb_ctf_id_t id; 77 ulong_t off; 78 char name[64]; 79 80 if (idp == NULL) { 81 if (mdb_ctf_lookup_by_name(type, &id) == -1) { 82 mdb_warn("couldn't find type %s", type); 83 return (DCMD_ERR); 84 } 85 idp = &id; 86 } else { 87 type = name; 88 mdb_ctf_type_name(*idp, name, sizeof (name)); 89 } 90 91 if (mdb_ctf_offsetof(*idp, member, &off) == -1) { 92 mdb_warn("couldn't find member %s of type %s\n", member, type); 93 return (DCMD_ERR); 94 } 95 if (off % 8 != 0) { 96 mdb_warn("member %s of type %s is unsupported bitfield", 97 member, type); 98 return (DCMD_ERR); 99 } 100 off /= 8; 101 102 if (mdb_vread(buf, len, addr + off) == -1) { 103 mdb_warn("failed to read %s from %s at %p", 104 member, type, addr + off); 105 return (DCMD_ERR); 106 } 107 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */ 108 109 return (0); 110 } 111 112 #define GETMEMB(addr, structname, member, dest) \ 113 getmember(addr, ZFS_STRUCT structname, NULL, #member, \ 114 sizeof (dest), &(dest)) 115 116 #define GETMEMBID(addr, ctfid, member, dest) \ 117 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest)) 118 119 static boolean_t 120 strisprint(const char *cp) 121 { 122 for (; *cp; cp++) { 123 if (!isprint(*cp)) 124 return (B_FALSE); 125 } 126 return (B_TRUE); 127 } 128 129 #define NICENUM_BUFLEN 6 130 131 static int 132 snprintfrac(char *buf, int len, 133 uint64_t numerator, uint64_t denom, int frac_digits) 134 { 135 int mul = 1; 136 int whole, frac, i; 137 138 for (i = frac_digits; i; i--) 139 mul *= 10; 140 whole = numerator / denom; 141 frac = mul * numerator / denom - mul * whole; 142 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac)); 143 } 144 145 static void 146 mdb_nicenum(uint64_t num, char *buf) 147 { 148 uint64_t n = num; 149 int index = 0; 150 char *u; 151 152 while (n >= 1024) { 153 n = (n + (1024 / 2)) / 1024; /* Round up or down */ 154 index++; 155 } 156 157 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2]; 158 159 if (index == 0) { 160 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu", 161 (u_longlong_t)n); 162 } else if (n < 10 && (num & (num - 1)) != 0) { 163 (void) snprintfrac(buf, NICENUM_BUFLEN, 164 num, 1ULL << 10 * index, 2); 165 strcat(buf, u); 166 } else if (n < 100 && (num & (num - 1)) != 0) { 167 (void) snprintfrac(buf, NICENUM_BUFLEN, 168 num, 1ULL << 10 * index, 1); 169 strcat(buf, u); 170 } else { 171 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s", 172 (u_longlong_t)n, u); 173 } 174 } 175 176 static int verbose; 177 178 static int 179 freelist_walk_init(mdb_walk_state_t *wsp) 180 { 181 if (wsp->walk_addr == NULL) { 182 mdb_warn("must supply starting address\n"); 183 return (WALK_ERR); 184 } 185 186 wsp->walk_data = 0; /* Index into the freelist */ 187 return (WALK_NEXT); 188 } 189 190 static int 191 freelist_walk_step(mdb_walk_state_t *wsp) 192 { 193 uint64_t entry; 194 uintptr_t number = (uintptr_t)wsp->walk_data; 195 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID", 196 "INVALID", "INVALID", "INVALID", "INVALID" }; 197 int mapshift = SPA_MINBLOCKSHIFT; 198 199 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) { 200 mdb_warn("failed to read freelist entry %p", wsp->walk_addr); 201 return (WALK_DONE); 202 } 203 wsp->walk_addr += sizeof (entry); 204 wsp->walk_data = (void *)(number + 1); 205 206 if (SM_DEBUG_DECODE(entry)) { 207 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n", 208 number, 209 ddata[SM_DEBUG_ACTION_DECODE(entry)], 210 SM_DEBUG_TXG_DECODE(entry), 211 SM_DEBUG_SYNCPASS_DECODE(entry)); 212 } else { 213 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c " 214 "size=%06llx", number, 215 SM_OFFSET_DECODE(entry) << mapshift, 216 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) << 217 mapshift, 218 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F', 219 SM_RUN_DECODE(entry) << mapshift); 220 if (verbose) 221 mdb_printf(" (raw=%012llx)\n", entry); 222 mdb_printf("\n"); 223 } 224 return (WALK_NEXT); 225 } 226 227 static int 228 mdb_dsl_dir_name(uintptr_t addr, char *buf) 229 { 230 static int gotid; 231 static mdb_ctf_id_t dd_id; 232 uintptr_t dd_parent; 233 char dd_myname[ZFS_MAX_DATASET_NAME_LEN]; 234 235 if (!gotid) { 236 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir", 237 &dd_id) == -1) { 238 mdb_warn("couldn't find struct dsl_dir"); 239 return (DCMD_ERR); 240 } 241 gotid = TRUE; 242 } 243 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) || 244 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) { 245 return (DCMD_ERR); 246 } 247 248 if (dd_parent) { 249 if (mdb_dsl_dir_name(dd_parent, buf)) 250 return (DCMD_ERR); 251 strcat(buf, "/"); 252 } 253 254 if (dd_myname[0]) 255 strcat(buf, dd_myname); 256 else 257 strcat(buf, "???"); 258 259 return (0); 260 } 261 262 static int 263 objset_name(uintptr_t addr, char *buf) 264 { 265 static int gotid; 266 static mdb_ctf_id_t os_id, ds_id; 267 uintptr_t os_dsl_dataset; 268 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN]; 269 uintptr_t ds_dir; 270 271 buf[0] = '\0'; 272 273 if (!gotid) { 274 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset", 275 &os_id) == -1) { 276 mdb_warn("couldn't find struct objset"); 277 return (DCMD_ERR); 278 } 279 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset", 280 &ds_id) == -1) { 281 mdb_warn("couldn't find struct dsl_dataset"); 282 return (DCMD_ERR); 283 } 284 285 gotid = TRUE; 286 } 287 288 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset)) 289 return (DCMD_ERR); 290 291 if (os_dsl_dataset == 0) { 292 strcat(buf, "mos"); 293 return (0); 294 } 295 296 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) || 297 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) { 298 return (DCMD_ERR); 299 } 300 301 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf)) 302 return (DCMD_ERR); 303 304 if (ds_snapname[0]) { 305 strcat(buf, "@"); 306 strcat(buf, ds_snapname); 307 } 308 return (0); 309 } 310 311 static void 312 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val, 313 const char *prefix) 314 { 315 const char *cp; 316 size_t len = strlen(prefix); 317 318 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) { 319 if (strncmp(cp, prefix, len) == 0) 320 cp += len; 321 (void) strncpy(out, cp, size); 322 } else { 323 mdb_snprintf(out, size, "? (%d)", val); 324 } 325 } 326 327 /* ARGSUSED */ 328 static int 329 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 330 { 331 /* 332 * This table can be approximately generated by running: 333 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2 334 */ 335 static const char *params[] = { 336 "arc_reduce_dnlc_percent", 337 "arc_lotsfree_percent", 338 "zfs_dirty_data_max", 339 "zfs_dirty_data_sync", 340 "zfs_delay_max_ns", 341 "zfs_delay_min_dirty_percent", 342 "zfs_delay_scale", 343 "zfs_vdev_max_active", 344 "zfs_vdev_sync_read_min_active", 345 "zfs_vdev_sync_read_max_active", 346 "zfs_vdev_sync_write_min_active", 347 "zfs_vdev_sync_write_max_active", 348 "zfs_vdev_async_read_min_active", 349 "zfs_vdev_async_read_max_active", 350 "zfs_vdev_async_write_min_active", 351 "zfs_vdev_async_write_max_active", 352 "zfs_vdev_scrub_min_active", 353 "zfs_vdev_scrub_max_active", 354 "zfs_vdev_async_write_active_min_dirty_percent", 355 "zfs_vdev_async_write_active_max_dirty_percent", 356 "spa_asize_inflation", 357 "zfs_arc_max", 358 "zfs_arc_min", 359 "arc_shrink_shift", 360 "zfs_mdcomp_disable", 361 "zfs_prefetch_disable", 362 "zfetch_max_streams", 363 "zfetch_min_sec_reap", 364 "zfetch_block_cap", 365 "zfetch_array_rd_sz", 366 "zfs_default_bs", 367 "zfs_default_ibs", 368 "metaslab_aliquot", 369 "reference_tracking_enable", 370 "reference_history", 371 "spa_max_replication_override", 372 "spa_mode_global", 373 "zfs_flags", 374 "zfs_txg_timeout", 375 "zfs_vdev_cache_max", 376 "zfs_vdev_cache_size", 377 "zfs_vdev_cache_bshift", 378 "vdev_mirror_shift", 379 "zfs_scrub_limit", 380 "zfs_no_scrub_io", 381 "zfs_no_scrub_prefetch", 382 "zfs_vdev_aggregation_limit", 383 "fzap_default_block_shift", 384 "zfs_immediate_write_sz", 385 "zfs_read_chunk_size", 386 "zfs_nocacheflush", 387 "zil_replay_disable", 388 "metaslab_gang_bang", 389 "metaslab_df_alloc_threshold", 390 "metaslab_df_free_pct", 391 "zio_injection_enabled", 392 "zvol_immediate_write_sz", 393 }; 394 395 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) { 396 int sz; 397 uint64_t val64; 398 uint32_t *val32p = (uint32_t *)&val64; 399 400 sz = mdb_readvar(&val64, params[i]); 401 if (sz == 4) { 402 mdb_printf("%s = 0x%x\n", params[i], *val32p); 403 } else if (sz == 8) { 404 mdb_printf("%s = 0x%llx\n", params[i], val64); 405 } else { 406 mdb_warn("variable %s not found", params[i]); 407 } 408 } 409 410 return (DCMD_OK); 411 } 412 413 /* ARGSUSED */ 414 static int 415 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 416 { 417 mdb_ctf_id_t type_enum, checksum_enum, compress_enum; 418 char type[80], checksum[80], compress[80]; 419 blkptr_t blk, *bp = &blk; 420 char buf[BP_SPRINTF_LEN]; 421 422 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) { 423 mdb_warn("failed to read blkptr_t"); 424 return (DCMD_ERR); 425 } 426 427 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 || 428 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 || 429 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) { 430 mdb_warn("Could not find blkptr enumerated types"); 431 return (DCMD_ERR); 432 } 433 434 enum_lookup(type, sizeof (type), type_enum, 435 BP_GET_TYPE(bp), "DMU_OT_"); 436 enum_lookup(checksum, sizeof (checksum), checksum_enum, 437 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_"); 438 enum_lookup(compress, sizeof (compress), compress_enum, 439 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_"); 440 441 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type, 442 checksum, compress); 443 444 mdb_printf("%s\n", buf); 445 446 return (DCMD_OK); 447 } 448 449 typedef struct mdb_dmu_buf_impl { 450 struct { 451 uint64_t db_object; 452 uintptr_t db_data; 453 } db; 454 uintptr_t db_objset; 455 uint64_t db_level; 456 uint64_t db_blkid; 457 struct { 458 uint64_t rc_count; 459 } db_holds; 460 } mdb_dmu_buf_impl_t; 461 462 /* ARGSUSED */ 463 static int 464 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 465 { 466 mdb_dmu_buf_impl_t db; 467 char objectname[32]; 468 char blkidname[32]; 469 char path[ZFS_MAX_DATASET_NAME_LEN]; 470 int ptr_width = (int)(sizeof (void *)) * 2; 471 472 if (DCMD_HDRSPEC(flags)) 473 mdb_printf("%*s %8s %3s %9s %5s %s\n", 474 ptr_width, "addr", "object", "lvl", "blkid", "holds", "os"); 475 476 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 477 addr, 0) == -1) 478 return (DCMD_ERR); 479 480 if (db.db.db_object == DMU_META_DNODE_OBJECT) 481 (void) strcpy(objectname, "mdn"); 482 else 483 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx", 484 (u_longlong_t)db.db.db_object); 485 486 if (db.db_blkid == DMU_BONUS_BLKID) 487 (void) strcpy(blkidname, "bonus"); 488 else 489 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx", 490 (u_longlong_t)db.db_blkid); 491 492 if (objset_name(db.db_objset, path)) { 493 return (DCMD_ERR); 494 } 495 496 mdb_printf("%*p %8s %3u %9s %5llu %s\n", ptr_width, addr, 497 objectname, (int)db.db_level, blkidname, 498 db.db_holds.rc_count, path); 499 500 return (DCMD_OK); 501 } 502 503 /* ARGSUSED */ 504 static int 505 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 506 { 507 #define HISTOSZ 32 508 uintptr_t dbp; 509 dmu_buf_impl_t db; 510 dbuf_hash_table_t ht; 511 uint64_t bucket, ndbufs; 512 uint64_t histo[HISTOSZ]; 513 uint64_t histo2[HISTOSZ]; 514 int i, maxidx; 515 516 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) { 517 mdb_warn("failed to read 'dbuf_hash_table'"); 518 return (DCMD_ERR); 519 } 520 521 for (i = 0; i < HISTOSZ; i++) { 522 histo[i] = 0; 523 histo2[i] = 0; 524 } 525 526 ndbufs = 0; 527 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) { 528 int len; 529 530 if (mdb_vread(&dbp, sizeof (void *), 531 (uintptr_t)(ht.hash_table+bucket)) == -1) { 532 mdb_warn("failed to read hash bucket %u at %p", 533 bucket, ht.hash_table+bucket); 534 return (DCMD_ERR); 535 } 536 537 len = 0; 538 while (dbp != 0) { 539 if (mdb_vread(&db, sizeof (dmu_buf_impl_t), 540 dbp) == -1) { 541 mdb_warn("failed to read dbuf at %p", dbp); 542 return (DCMD_ERR); 543 } 544 dbp = (uintptr_t)db.db_hash_next; 545 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--) 546 histo2[i]++; 547 len++; 548 ndbufs++; 549 } 550 551 if (len >= HISTOSZ) 552 len = HISTOSZ-1; 553 histo[len]++; 554 } 555 556 mdb_printf("hash table has %llu buckets, %llu dbufs " 557 "(avg %llu buckets/dbuf)\n", 558 ht.hash_table_mask+1, ndbufs, 559 (ht.hash_table_mask+1)/ndbufs); 560 561 mdb_printf("\n"); 562 maxidx = 0; 563 for (i = 0; i < HISTOSZ; i++) 564 if (histo[i] > 0) 565 maxidx = i; 566 mdb_printf("hash chain length number of buckets\n"); 567 for (i = 0; i <= maxidx; i++) 568 mdb_printf("%u %llu\n", i, histo[i]); 569 570 mdb_printf("\n"); 571 maxidx = 0; 572 for (i = 0; i < HISTOSZ; i++) 573 if (histo2[i] > 0) 574 maxidx = i; 575 mdb_printf("hash chain depth number of dbufs\n"); 576 for (i = 0; i <= maxidx; i++) 577 mdb_printf("%u or more %llu %llu%%\n", 578 i, histo2[i], histo2[i]*100/ndbufs); 579 580 581 return (DCMD_OK); 582 } 583 584 #define CHAIN_END 0xffff 585 /* 586 * ::zap_leaf [-v] 587 * 588 * Print a zap_leaf_phys_t, assumed to be 16k 589 */ 590 /* ARGSUSED */ 591 static int 592 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 593 { 594 char buf[16*1024]; 595 int verbose = B_FALSE; 596 int four = B_FALSE; 597 dmu_buf_t l_dbuf; 598 zap_leaf_t l; 599 zap_leaf_phys_t *zlp = (void *)buf; 600 int i; 601 602 if (mdb_getopts(argc, argv, 603 'v', MDB_OPT_SETBITS, TRUE, &verbose, 604 '4', MDB_OPT_SETBITS, TRUE, &four, 605 NULL) != argc) 606 return (DCMD_USAGE); 607 608 l_dbuf.db_data = zlp; 609 l.l_dbuf = &l_dbuf; 610 l.l_bs = 14; /* assume 16k blocks */ 611 if (four) 612 l.l_bs = 12; 613 614 if (!(flags & DCMD_ADDRSPEC)) { 615 return (DCMD_USAGE); 616 } 617 618 if (mdb_vread(buf, sizeof (buf), addr) == -1) { 619 mdb_warn("failed to read zap_leaf_phys_t at %p", addr); 620 return (DCMD_ERR); 621 } 622 623 if (zlp->l_hdr.lh_block_type != ZBT_LEAF || 624 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) { 625 mdb_warn("This does not appear to be a zap_leaf_phys_t"); 626 return (DCMD_ERR); 627 } 628 629 mdb_printf("zap_leaf_phys_t at %p:\n", addr); 630 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len); 631 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix); 632 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries); 633 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree, 634 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l))); 635 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist); 636 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags, 637 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ? 638 "ENTRIES_CDSORTED" : ""); 639 640 if (verbose) { 641 mdb_printf(" hash table:\n"); 642 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) { 643 if (zlp->l_hash[i] != CHAIN_END) 644 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]); 645 } 646 } 647 648 mdb_printf(" chunks:\n"); 649 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { 650 /* LINTED: alignment */ 651 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i); 652 switch (zlc->l_entry.le_type) { 653 case ZAP_CHUNK_FREE: 654 if (verbose) { 655 mdb_printf(" %u: free; lf_next = %u\n", 656 i, zlc->l_free.lf_next); 657 } 658 break; 659 case ZAP_CHUNK_ENTRY: 660 mdb_printf(" %u: entry\n", i); 661 if (verbose) { 662 mdb_printf(" le_next = %u\n", 663 zlc->l_entry.le_next); 664 } 665 mdb_printf(" le_name_chunk = %u\n", 666 zlc->l_entry.le_name_chunk); 667 mdb_printf(" le_name_numints = %u\n", 668 zlc->l_entry.le_name_numints); 669 mdb_printf(" le_value_chunk = %u\n", 670 zlc->l_entry.le_value_chunk); 671 mdb_printf(" le_value_intlen = %u\n", 672 zlc->l_entry.le_value_intlen); 673 mdb_printf(" le_value_numints = %u\n", 674 zlc->l_entry.le_value_numints); 675 mdb_printf(" le_cd = %u\n", 676 zlc->l_entry.le_cd); 677 mdb_printf(" le_hash = %llx\n", 678 zlc->l_entry.le_hash); 679 break; 680 case ZAP_CHUNK_ARRAY: 681 mdb_printf(" %u: array", i); 682 if (strisprint((char *)zlc->l_array.la_array)) 683 mdb_printf(" \"%s\"", zlc->l_array.la_array); 684 mdb_printf("\n"); 685 if (verbose) { 686 int j; 687 mdb_printf(" "); 688 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) { 689 mdb_printf("%02x ", 690 zlc->l_array.la_array[j]); 691 } 692 mdb_printf("\n"); 693 } 694 if (zlc->l_array.la_next != CHAIN_END) { 695 mdb_printf(" lf_next = %u\n", 696 zlc->l_array.la_next); 697 } 698 break; 699 default: 700 mdb_printf(" %u: undefined type %u\n", 701 zlc->l_entry.le_type); 702 } 703 } 704 705 return (DCMD_OK); 706 } 707 708 typedef struct dbufs_data { 709 mdb_ctf_id_t id; 710 uint64_t objset; 711 uint64_t object; 712 uint64_t level; 713 uint64_t blkid; 714 char *osname; 715 } dbufs_data_t; 716 717 #define DBUFS_UNSET (0xbaddcafedeadbeefULL) 718 719 /* ARGSUSED */ 720 static int 721 dbufs_cb(uintptr_t addr, const void *unknown, void *arg) 722 { 723 dbufs_data_t *data = arg; 724 uintptr_t objset; 725 dmu_buf_t db; 726 uint8_t level; 727 uint64_t blkid; 728 char osname[ZFS_MAX_DATASET_NAME_LEN]; 729 730 if (GETMEMBID(addr, &data->id, db_objset, objset) || 731 GETMEMBID(addr, &data->id, db, db) || 732 GETMEMBID(addr, &data->id, db_level, level) || 733 GETMEMBID(addr, &data->id, db_blkid, blkid)) { 734 return (WALK_ERR); 735 } 736 737 if ((data->objset == DBUFS_UNSET || data->objset == objset) && 738 (data->osname == NULL || (objset_name(objset, osname) == 0 && 739 strcmp(data->osname, osname) == 0)) && 740 (data->object == DBUFS_UNSET || data->object == db.db_object) && 741 (data->level == DBUFS_UNSET || data->level == level) && 742 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) { 743 mdb_printf("%#lr\n", addr); 744 } 745 return (WALK_NEXT); 746 } 747 748 /* ARGSUSED */ 749 static int 750 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 751 { 752 dbufs_data_t data; 753 char *object = NULL; 754 char *blkid = NULL; 755 756 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET; 757 data.osname = NULL; 758 759 if (mdb_getopts(argc, argv, 760 'O', MDB_OPT_UINT64, &data.objset, 761 'n', MDB_OPT_STR, &data.osname, 762 'o', MDB_OPT_STR, &object, 763 'l', MDB_OPT_UINT64, &data.level, 764 'b', MDB_OPT_STR, &blkid) != argc) { 765 return (DCMD_USAGE); 766 } 767 768 if (object) { 769 if (strcmp(object, "mdn") == 0) { 770 data.object = DMU_META_DNODE_OBJECT; 771 } else { 772 data.object = mdb_strtoull(object); 773 } 774 } 775 776 if (blkid) { 777 if (strcmp(blkid, "bonus") == 0) { 778 data.blkid = DMU_BONUS_BLKID; 779 } else { 780 data.blkid = mdb_strtoull(blkid); 781 } 782 } 783 784 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) { 785 mdb_warn("couldn't find struct dmu_buf_impl_t"); 786 return (DCMD_ERR); 787 } 788 789 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) { 790 mdb_warn("can't walk dbufs"); 791 return (DCMD_ERR); 792 } 793 794 return (DCMD_OK); 795 } 796 797 typedef struct abuf_find_data { 798 dva_t dva; 799 mdb_ctf_id_t id; 800 } abuf_find_data_t; 801 802 /* ARGSUSED */ 803 static int 804 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg) 805 { 806 abuf_find_data_t *data = arg; 807 dva_t dva; 808 809 if (GETMEMBID(addr, &data->id, b_dva, dva)) { 810 return (WALK_ERR); 811 } 812 813 if (dva.dva_word[0] == data->dva.dva_word[0] && 814 dva.dva_word[1] == data->dva.dva_word[1]) { 815 mdb_printf("%#lr\n", addr); 816 } 817 return (WALK_NEXT); 818 } 819 820 /* ARGSUSED */ 821 static int 822 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 823 { 824 abuf_find_data_t data; 825 GElf_Sym sym; 826 int i; 827 const char *syms[] = { 828 "ARC_mru", 829 "ARC_mru_ghost", 830 "ARC_mfu", 831 "ARC_mfu_ghost", 832 }; 833 834 if (argc != 2) 835 return (DCMD_USAGE); 836 837 for (i = 0; i < 2; i ++) { 838 switch (argv[i].a_type) { 839 case MDB_TYPE_STRING: 840 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str); 841 break; 842 case MDB_TYPE_IMMEDIATE: 843 data.dva.dva_word[i] = argv[i].a_un.a_val; 844 break; 845 default: 846 return (DCMD_USAGE); 847 } 848 } 849 850 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) { 851 mdb_warn("couldn't find struct arc_buf_hdr"); 852 return (DCMD_ERR); 853 } 854 855 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) { 856 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) { 857 mdb_warn("can't find symbol %s", syms[i]); 858 return (DCMD_ERR); 859 } 860 861 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) { 862 mdb_warn("can't walk %s", syms[i]); 863 return (DCMD_ERR); 864 } 865 } 866 867 return (DCMD_OK); 868 } 869 870 871 typedef struct dbgmsg_arg { 872 boolean_t da_verbose; 873 boolean_t da_address; 874 } dbgmsg_arg_t; 875 876 /* ARGSUSED */ 877 static int 878 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg) 879 { 880 static mdb_ctf_id_t id; 881 static boolean_t gotid; 882 static ulong_t off; 883 884 dbgmsg_arg_t *da = arg; 885 time_t timestamp; 886 char buf[1024]; 887 888 if (!gotid) { 889 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) == 890 -1) { 891 mdb_warn("couldn't find struct zfs_dbgmsg"); 892 return (WALK_ERR); 893 } 894 gotid = TRUE; 895 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) { 896 mdb_warn("couldn't find zdm_msg"); 897 return (WALK_ERR); 898 } 899 off /= 8; 900 } 901 902 903 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) { 904 return (WALK_ERR); 905 } 906 907 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) { 908 mdb_warn("failed to read zdm_msg at %p\n", addr + off); 909 return (DCMD_ERR); 910 } 911 912 if (da->da_address) 913 mdb_printf("%p ", addr); 914 if (da->da_verbose) 915 mdb_printf("%Y ", timestamp); 916 917 mdb_printf("%s\n", buf); 918 919 if (da->da_verbose) 920 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 921 922 return (WALK_NEXT); 923 } 924 925 /* ARGSUSED */ 926 static int 927 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 928 { 929 GElf_Sym sym; 930 dbgmsg_arg_t da = { 0 }; 931 932 if (mdb_getopts(argc, argv, 933 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose, 934 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address, 935 NULL) != argc) 936 return (DCMD_USAGE); 937 938 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) { 939 mdb_warn("can't find zfs_dbgmsgs"); 940 return (DCMD_ERR); 941 } 942 943 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) { 944 mdb_warn("can't walk zfs_dbgmsgs"); 945 return (DCMD_ERR); 946 } 947 948 return (DCMD_OK); 949 } 950 951 /*ARGSUSED*/ 952 static int 953 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 954 { 955 kstat_named_t *stats; 956 GElf_Sym sym; 957 int nstats, i; 958 uint_t opt_a = FALSE; 959 uint_t opt_b = FALSE; 960 uint_t shift = 0; 961 const char *suffix; 962 963 static const char *bytestats[] = { 964 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size", 965 "arc_meta_used", "arc_meta_limit", "arc_meta_max", 966 "arc_meta_min", "hdr_size", "data_size", "metadata_size", 967 "other_size", "anon_size", "anon_evictable_data", 968 "anon_evictable_metadata", "mru_size", "mru_evictable_data", 969 "mru_evictable_metadata", "mru_ghost_size", 970 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata", 971 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata", 972 "mfu_ghost_size", "mfu_ghost_evictable_data", 973 "mfu_ghost_evictable_metadata", "evict_l2_cached", 974 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes", 975 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size", 976 NULL 977 }; 978 979 static const char *extras[] = { 980 "arc_no_grow", "arc_tempreserve", 981 NULL 982 }; 983 984 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) { 985 mdb_warn("failed to find 'arc_stats'"); 986 return (DCMD_ERR); 987 } 988 989 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC); 990 991 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) { 992 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value); 993 return (DCMD_ERR); 994 } 995 996 nstats = sym.st_size / sizeof (kstat_named_t); 997 998 /* NB: -a / opt_a are ignored for backwards compatability */ 999 if (mdb_getopts(argc, argv, 1000 'a', MDB_OPT_SETBITS, TRUE, &opt_a, 1001 'b', MDB_OPT_SETBITS, TRUE, &opt_b, 1002 'k', MDB_OPT_SETBITS, 10, &shift, 1003 'm', MDB_OPT_SETBITS, 20, &shift, 1004 'g', MDB_OPT_SETBITS, 30, &shift, 1005 NULL) != argc) 1006 return (DCMD_USAGE); 1007 1008 if (!opt_b && !shift) 1009 shift = 20; 1010 1011 switch (shift) { 1012 case 0: 1013 suffix = "B"; 1014 break; 1015 case 10: 1016 suffix = "KB"; 1017 break; 1018 case 20: 1019 suffix = "MB"; 1020 break; 1021 case 30: 1022 suffix = "GB"; 1023 break; 1024 default: 1025 suffix = "XX"; 1026 } 1027 1028 for (i = 0; i < nstats; i++) { 1029 int j; 1030 boolean_t bytes = B_FALSE; 1031 1032 for (j = 0; bytestats[j]; j++) { 1033 if (strcmp(stats[i].name, bytestats[j]) == 0) { 1034 bytes = B_TRUE; 1035 break; 1036 } 1037 } 1038 1039 if (bytes) { 1040 mdb_printf("%-25s = %9llu %s\n", stats[i].name, 1041 stats[i].value.ui64 >> shift, suffix); 1042 } else { 1043 mdb_printf("%-25s = %9llu\n", stats[i].name, 1044 stats[i].value.ui64); 1045 } 1046 } 1047 1048 for (i = 0; extras[i]; i++) { 1049 uint64_t buf; 1050 1051 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) { 1052 mdb_warn("failed to find '%s'", extras[i]); 1053 return (DCMD_ERR); 1054 } 1055 1056 if (sym.st_size != sizeof (uint64_t) && 1057 sym.st_size != sizeof (uint32_t)) { 1058 mdb_warn("expected scalar for variable '%s'\n", 1059 extras[i]); 1060 return (DCMD_ERR); 1061 } 1062 1063 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) { 1064 mdb_warn("couldn't read '%s'", extras[i]); 1065 return (DCMD_ERR); 1066 } 1067 1068 mdb_printf("%-25s = ", extras[i]); 1069 1070 /* NB: all the 64-bit extras happen to be byte counts */ 1071 if (sym.st_size == sizeof (uint64_t)) 1072 mdb_printf("%9llu %s\n", buf >> shift, suffix); 1073 1074 if (sym.st_size == sizeof (uint32_t)) 1075 mdb_printf("%9d\n", *((uint32_t *)&buf)); 1076 } 1077 return (DCMD_OK); 1078 } 1079 1080 typedef struct mdb_spa_print { 1081 pool_state_t spa_state; 1082 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; 1083 } mdb_spa_print_t; 1084 1085 /* 1086 * ::spa 1087 * 1088 * -c Print configuration information as well 1089 * -v Print vdev state 1090 * -e Print vdev error stats 1091 * -m Print vdev metaslab info 1092 * -M print vdev metaslab group info 1093 * -h Print histogram info (must be combined with -m or -M) 1094 * 1095 * Print a summarized spa_t. When given no arguments, prints out a table of all 1096 * active pools on the system. 1097 */ 1098 /* ARGSUSED */ 1099 static int 1100 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1101 { 1102 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED", 1103 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" }; 1104 const char *state; 1105 int spa_flags = 0; 1106 1107 if (mdb_getopts(argc, argv, 1108 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags, 1109 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags, 1110 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1111 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1112 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1113 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1114 NULL) != argc) 1115 return (DCMD_USAGE); 1116 1117 if (!(flags & DCMD_ADDRSPEC)) { 1118 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) { 1119 mdb_warn("can't walk spa"); 1120 return (DCMD_ERR); 1121 } 1122 1123 return (DCMD_OK); 1124 } 1125 1126 if (flags & DCMD_PIPE_OUT) { 1127 mdb_printf("%#lr\n", addr); 1128 return (DCMD_OK); 1129 } 1130 1131 if (DCMD_HDRSPEC(flags)) 1132 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE", 1133 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME"); 1134 1135 mdb_spa_print_t spa; 1136 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1) 1137 return (DCMD_ERR); 1138 1139 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL) 1140 state = "UNKNOWN"; 1141 else 1142 state = statetab[spa.spa_state]; 1143 1144 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name); 1145 1146 if (spa_flags & SPA_FLAG_CONFIG) { 1147 mdb_printf("\n"); 1148 mdb_inc_indent(4); 1149 if (mdb_call_dcmd("spa_config", addr, flags, 0, 1150 NULL) != DCMD_OK) 1151 return (DCMD_ERR); 1152 mdb_dec_indent(4); 1153 } 1154 1155 if (spa_flags & SPA_FLAG_ALL_VDEV) { 1156 mdb_arg_t v; 1157 char opts[100] = "-"; 1158 int args = 1159 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1; 1160 1161 if (spa_flags & SPA_FLAG_ERRORS) 1162 strcat(opts, "e"); 1163 if (spa_flags & SPA_FLAG_METASLABS) 1164 strcat(opts, "m"); 1165 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 1166 strcat(opts, "M"); 1167 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1168 strcat(opts, "h"); 1169 1170 v.a_type = MDB_TYPE_STRING; 1171 v.a_un.a_str = opts; 1172 1173 mdb_printf("\n"); 1174 mdb_inc_indent(4); 1175 if (mdb_call_dcmd("spa_vdevs", addr, flags, args, 1176 &v) != DCMD_OK) 1177 return (DCMD_ERR); 1178 mdb_dec_indent(4); 1179 } 1180 1181 return (DCMD_OK); 1182 } 1183 1184 typedef struct mdb_spa_config_spa { 1185 uintptr_t spa_config; 1186 } mdb_spa_config_spa_t; 1187 1188 /* 1189 * ::spa_config 1190 * 1191 * Given a spa_t, print the configuration information stored in spa_config. 1192 * Since it's just an nvlist, format it as an indented list of name=value pairs. 1193 * We simply read the value of spa_config and pass off to ::nvlist. 1194 */ 1195 /* ARGSUSED */ 1196 static int 1197 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1198 { 1199 mdb_spa_config_spa_t spa; 1200 1201 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 1202 return (DCMD_USAGE); 1203 1204 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t", 1205 addr, 0) == -1) 1206 return (DCMD_ERR); 1207 1208 if (spa.spa_config == 0) { 1209 mdb_printf("(none)\n"); 1210 return (DCMD_OK); 1211 } 1212 1213 return (mdb_call_dcmd("nvlist", spa.spa_config, flags, 1214 0, NULL)); 1215 } 1216 1217 const char histo_stars[] = "****************************************"; 1218 const int histo_width = sizeof (histo_stars) - 1; 1219 1220 static void 1221 dump_histogram(const uint64_t *histo, int size, int offset) 1222 { 1223 int i; 1224 int minidx = size - 1; 1225 int maxidx = 0; 1226 uint64_t max = 0; 1227 1228 for (i = 0; i < size; i++) { 1229 if (histo[i] > max) 1230 max = histo[i]; 1231 if (histo[i] > 0 && i > maxidx) 1232 maxidx = i; 1233 if (histo[i] > 0 && i < minidx) 1234 minidx = i; 1235 } 1236 1237 if (max < histo_width) 1238 max = histo_width; 1239 1240 for (i = minidx; i <= maxidx; i++) { 1241 mdb_printf("%3u: %6llu %s\n", 1242 i + offset, (u_longlong_t)histo[i], 1243 &histo_stars[(max - histo[i]) * histo_width / max]); 1244 } 1245 } 1246 1247 typedef struct mdb_range_tree { 1248 uint64_t rt_space; 1249 } mdb_range_tree_t; 1250 1251 typedef struct mdb_metaslab_group { 1252 uint64_t mg_fragmentation; 1253 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE]; 1254 } mdb_metaslab_group_t; 1255 1256 typedef struct mdb_metaslab { 1257 uint64_t ms_id; 1258 uint64_t ms_start; 1259 uint64_t ms_size; 1260 uint64_t ms_fragmentation; 1261 uintptr_t ms_alloctree[TXG_SIZE]; 1262 uintptr_t ms_freetree[TXG_SIZE]; 1263 uintptr_t ms_tree; 1264 uintptr_t ms_sm; 1265 } mdb_metaslab_t; 1266 1267 typedef struct mdb_space_map_phys_t { 1268 uint64_t smp_alloc; 1269 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE]; 1270 } mdb_space_map_phys_t; 1271 1272 typedef struct mdb_space_map { 1273 uint64_t sm_size; 1274 uint8_t sm_shift; 1275 uint64_t sm_alloc; 1276 uintptr_t sm_phys; 1277 } mdb_space_map_t; 1278 1279 typedef struct mdb_vdev { 1280 uintptr_t vdev_ms; 1281 uint64_t vdev_ms_count; 1282 vdev_stat_t vdev_stat; 1283 } mdb_vdev_t; 1284 1285 static int 1286 metaslab_stats(uintptr_t addr, int spa_flags) 1287 { 1288 mdb_vdev_t vdev; 1289 uintptr_t *vdev_ms; 1290 1291 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t", 1292 (uintptr_t)addr, 0) == -1) { 1293 mdb_warn("failed to read vdev at %p\n", addr); 1294 return (DCMD_ERR); 1295 } 1296 1297 mdb_inc_indent(4); 1298 mdb_printf("%<u>%-?s %6s %20s %10s %9s%</u>\n", "ADDR", "ID", 1299 "OFFSET", "FREE", "FRAGMENTATION"); 1300 1301 vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *), 1302 UM_SLEEP | UM_GC); 1303 if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *), 1304 (uintptr_t)vdev.vdev_ms) == -1) { 1305 mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms); 1306 return (DCMD_ERR); 1307 } 1308 1309 for (int m = 0; m < vdev.vdev_ms_count; m++) { 1310 mdb_metaslab_t ms; 1311 mdb_space_map_t sm = { 0 }; 1312 char free[NICENUM_BUFLEN]; 1313 1314 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1315 (uintptr_t)vdev_ms[m], 0) == -1) 1316 return (DCMD_ERR); 1317 1318 if (ms.ms_sm != NULL && 1319 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t", 1320 ms.ms_sm, 0) == -1) 1321 return (DCMD_ERR); 1322 1323 mdb_nicenum(ms.ms_size - sm.sm_alloc, free); 1324 1325 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id, 1326 ms.ms_start, free); 1327 if (ms.ms_fragmentation == ZFS_FRAG_INVALID) 1328 mdb_printf("%9s\n", "-"); 1329 else 1330 mdb_printf("%9llu%%\n", ms.ms_fragmentation); 1331 1332 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != NULL) { 1333 mdb_space_map_phys_t smp; 1334 1335 if (sm.sm_phys == NULL) 1336 continue; 1337 1338 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 1339 "mdb_space_map_phys_t", sm.sm_phys, 0); 1340 1341 dump_histogram(smp.smp_histogram, 1342 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift); 1343 } 1344 } 1345 mdb_dec_indent(4); 1346 return (DCMD_OK); 1347 } 1348 1349 static int 1350 metaslab_group_stats(uintptr_t addr, int spa_flags) 1351 { 1352 mdb_metaslab_group_t mg; 1353 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t", 1354 (uintptr_t)addr, 0) == -1) { 1355 mdb_warn("failed to read vdev_mg at %p\n", addr); 1356 return (DCMD_ERR); 1357 } 1358 1359 mdb_inc_indent(4); 1360 mdb_printf("%<u>%-?s %15s%</u>\n", "ADDR", "FRAGMENTATION"); 1361 if (mg.mg_fragmentation == ZFS_FRAG_INVALID) 1362 mdb_printf("%0?p %15s\n", addr, "-"); 1363 else 1364 mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation); 1365 1366 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1367 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0); 1368 mdb_dec_indent(4); 1369 return (DCMD_OK); 1370 } 1371 1372 /* 1373 * ::vdev 1374 * 1375 * Print out a summarized vdev_t, in the following form: 1376 * 1377 * ADDR STATE AUX DESC 1378 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0 1379 * 1380 * If '-r' is specified, recursively visit all children. 1381 * 1382 * With '-e', the statistics associated with the vdev are printed as well. 1383 */ 1384 static int 1385 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive, 1386 int spa_flags) 1387 { 1388 vdev_t vdev; 1389 char desc[MAXNAMELEN]; 1390 int c, children; 1391 uintptr_t *child; 1392 const char *state, *aux; 1393 1394 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) { 1395 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr); 1396 return (DCMD_ERR); 1397 } 1398 1399 if (flags & DCMD_PIPE_OUT) { 1400 mdb_printf("%#lr\n", addr); 1401 } else { 1402 if (vdev.vdev_path != NULL) { 1403 if (mdb_readstr(desc, sizeof (desc), 1404 (uintptr_t)vdev.vdev_path) == -1) { 1405 mdb_warn("failed to read vdev_path at %p\n", 1406 vdev.vdev_path); 1407 return (DCMD_ERR); 1408 } 1409 } else if (vdev.vdev_ops != NULL) { 1410 vdev_ops_t ops; 1411 if (mdb_vread(&ops, sizeof (ops), 1412 (uintptr_t)vdev.vdev_ops) == -1) { 1413 mdb_warn("failed to read vdev_ops at %p\n", 1414 vdev.vdev_ops); 1415 return (DCMD_ERR); 1416 } 1417 (void) strcpy(desc, ops.vdev_op_type); 1418 } else { 1419 (void) strcpy(desc, "<unknown>"); 1420 } 1421 1422 if (depth == 0 && DCMD_HDRSPEC(flags)) 1423 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n", 1424 "ADDR", "STATE", "AUX", 1425 sizeof (uintptr_t) == 4 ? 43 : 35, 1426 "DESCRIPTION"); 1427 1428 mdb_printf("%0?p ", addr); 1429 1430 switch (vdev.vdev_state) { 1431 case VDEV_STATE_CLOSED: 1432 state = "CLOSED"; 1433 break; 1434 case VDEV_STATE_OFFLINE: 1435 state = "OFFLINE"; 1436 break; 1437 case VDEV_STATE_CANT_OPEN: 1438 state = "CANT_OPEN"; 1439 break; 1440 case VDEV_STATE_DEGRADED: 1441 state = "DEGRADED"; 1442 break; 1443 case VDEV_STATE_HEALTHY: 1444 state = "HEALTHY"; 1445 break; 1446 case VDEV_STATE_REMOVED: 1447 state = "REMOVED"; 1448 break; 1449 case VDEV_STATE_FAULTED: 1450 state = "FAULTED"; 1451 break; 1452 default: 1453 state = "UNKNOWN"; 1454 break; 1455 } 1456 1457 switch (vdev.vdev_stat.vs_aux) { 1458 case VDEV_AUX_NONE: 1459 aux = "-"; 1460 break; 1461 case VDEV_AUX_OPEN_FAILED: 1462 aux = "OPEN_FAILED"; 1463 break; 1464 case VDEV_AUX_CORRUPT_DATA: 1465 aux = "CORRUPT_DATA"; 1466 break; 1467 case VDEV_AUX_NO_REPLICAS: 1468 aux = "NO_REPLICAS"; 1469 break; 1470 case VDEV_AUX_BAD_GUID_SUM: 1471 aux = "BAD_GUID_SUM"; 1472 break; 1473 case VDEV_AUX_TOO_SMALL: 1474 aux = "TOO_SMALL"; 1475 break; 1476 case VDEV_AUX_BAD_LABEL: 1477 aux = "BAD_LABEL"; 1478 break; 1479 case VDEV_AUX_VERSION_NEWER: 1480 aux = "VERS_NEWER"; 1481 break; 1482 case VDEV_AUX_VERSION_OLDER: 1483 aux = "VERS_OLDER"; 1484 break; 1485 case VDEV_AUX_UNSUP_FEAT: 1486 aux = "UNSUP_FEAT"; 1487 break; 1488 case VDEV_AUX_SPARED: 1489 aux = "SPARED"; 1490 break; 1491 case VDEV_AUX_ERR_EXCEEDED: 1492 aux = "ERR_EXCEEDED"; 1493 break; 1494 case VDEV_AUX_IO_FAILURE: 1495 aux = "IO_FAILURE"; 1496 break; 1497 case VDEV_AUX_BAD_LOG: 1498 aux = "BAD_LOG"; 1499 break; 1500 case VDEV_AUX_EXTERNAL: 1501 aux = "EXTERNAL"; 1502 break; 1503 case VDEV_AUX_SPLIT_POOL: 1504 aux = "SPLIT_POOL"; 1505 break; 1506 default: 1507 aux = "UNKNOWN"; 1508 break; 1509 } 1510 1511 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc); 1512 1513 if (spa_flags & SPA_FLAG_ERRORS) { 1514 vdev_stat_t *vs = &vdev.vdev_stat; 1515 int i; 1516 1517 mdb_inc_indent(4); 1518 mdb_printf("\n"); 1519 mdb_printf("%<u> %12s %12s %12s %12s " 1520 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM", 1521 "IOCTL"); 1522 mdb_printf("OPS "); 1523 for (i = 1; i < ZIO_TYPES; i++) 1524 mdb_printf("%11#llx%s", vs->vs_ops[i], 1525 i == ZIO_TYPES - 1 ? "" : " "); 1526 mdb_printf("\n"); 1527 mdb_printf("BYTES "); 1528 for (i = 1; i < ZIO_TYPES; i++) 1529 mdb_printf("%11#llx%s", vs->vs_bytes[i], 1530 i == ZIO_TYPES - 1 ? "" : " "); 1531 1532 1533 mdb_printf("\n"); 1534 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors); 1535 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors); 1536 mdb_printf("ECKSUM %10#llx\n", 1537 vs->vs_checksum_errors); 1538 mdb_dec_indent(4); 1539 mdb_printf("\n"); 1540 } 1541 1542 if (spa_flags & SPA_FLAG_METASLAB_GROUPS && 1543 vdev.vdev_mg != NULL) { 1544 metaslab_group_stats((uintptr_t)vdev.vdev_mg, 1545 spa_flags); 1546 } 1547 if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) { 1548 metaslab_stats((uintptr_t)addr, spa_flags); 1549 } 1550 } 1551 1552 children = vdev.vdev_children; 1553 1554 if (children == 0 || !recursive) 1555 return (DCMD_OK); 1556 1557 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC); 1558 if (mdb_vread(child, children * sizeof (void *), 1559 (uintptr_t)vdev.vdev_child) == -1) { 1560 mdb_warn("failed to read vdev children at %p", vdev.vdev_child); 1561 return (DCMD_ERR); 1562 } 1563 1564 for (c = 0; c < children; c++) { 1565 if (do_print_vdev(child[c], flags, depth + 2, recursive, 1566 spa_flags)) { 1567 return (DCMD_ERR); 1568 } 1569 } 1570 1571 return (DCMD_OK); 1572 } 1573 1574 static int 1575 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1576 { 1577 uint64_t depth = 0; 1578 boolean_t recursive = B_FALSE; 1579 int spa_flags = 0; 1580 1581 if (mdb_getopts(argc, argv, 1582 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1583 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1584 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1585 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1586 'r', MDB_OPT_SETBITS, TRUE, &recursive, 1587 'd', MDB_OPT_UINT64, &depth, NULL) != argc) 1588 return (DCMD_USAGE); 1589 1590 if (!(flags & DCMD_ADDRSPEC)) { 1591 mdb_warn("no vdev_t address given\n"); 1592 return (DCMD_ERR); 1593 } 1594 1595 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags)); 1596 } 1597 1598 typedef struct metaslab_walk_data { 1599 uint64_t mw_numvdevs; 1600 uintptr_t *mw_vdevs; 1601 int mw_curvdev; 1602 uint64_t mw_nummss; 1603 uintptr_t *mw_mss; 1604 int mw_curms; 1605 } metaslab_walk_data_t; 1606 1607 static int 1608 metaslab_walk_step(mdb_walk_state_t *wsp) 1609 { 1610 metaslab_walk_data_t *mw = wsp->walk_data; 1611 metaslab_t ms; 1612 uintptr_t msp; 1613 1614 if (mw->mw_curvdev >= mw->mw_numvdevs) 1615 return (WALK_DONE); 1616 1617 if (mw->mw_mss == NULL) { 1618 uintptr_t mssp; 1619 uintptr_t vdevp; 1620 1621 ASSERT(mw->mw_curms == 0); 1622 ASSERT(mw->mw_nummss == 0); 1623 1624 vdevp = mw->mw_vdevs[mw->mw_curvdev]; 1625 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) || 1626 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) { 1627 return (WALK_ERR); 1628 } 1629 1630 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*), 1631 UM_SLEEP | UM_GC); 1632 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*), 1633 mssp) == -1) { 1634 mdb_warn("failed to read vdev_ms at %p", mssp); 1635 return (WALK_ERR); 1636 } 1637 } 1638 1639 if (mw->mw_curms >= mw->mw_nummss) { 1640 mw->mw_mss = NULL; 1641 mw->mw_curms = 0; 1642 mw->mw_nummss = 0; 1643 mw->mw_curvdev++; 1644 return (WALK_NEXT); 1645 } 1646 1647 msp = mw->mw_mss[mw->mw_curms]; 1648 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) { 1649 mdb_warn("failed to read metaslab_t at %p", msp); 1650 return (WALK_ERR); 1651 } 1652 1653 mw->mw_curms++; 1654 1655 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata)); 1656 } 1657 1658 /* ARGSUSED */ 1659 static int 1660 metaslab_walk_init(mdb_walk_state_t *wsp) 1661 { 1662 metaslab_walk_data_t *mw; 1663 uintptr_t root_vdevp; 1664 uintptr_t childp; 1665 1666 if (wsp->walk_addr == NULL) { 1667 mdb_warn("must supply address of spa_t\n"); 1668 return (WALK_ERR); 1669 } 1670 1671 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC); 1672 1673 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) || 1674 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) || 1675 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) { 1676 return (DCMD_ERR); 1677 } 1678 1679 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *), 1680 UM_SLEEP | UM_GC); 1681 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *), 1682 childp) == -1) { 1683 mdb_warn("failed to read root vdev children at %p", childp); 1684 return (DCMD_ERR); 1685 } 1686 1687 wsp->walk_data = mw; 1688 1689 return (WALK_NEXT); 1690 } 1691 1692 typedef struct mdb_spa { 1693 uintptr_t spa_dsl_pool; 1694 uintptr_t spa_root_vdev; 1695 } mdb_spa_t; 1696 1697 typedef struct mdb_dsl_pool { 1698 uintptr_t dp_root_dir; 1699 } mdb_dsl_pool_t; 1700 1701 typedef struct mdb_dsl_dir { 1702 uintptr_t dd_dbuf; 1703 int64_t dd_space_towrite[TXG_SIZE]; 1704 } mdb_dsl_dir_t; 1705 1706 typedef struct mdb_dsl_dir_phys { 1707 uint64_t dd_used_bytes; 1708 uint64_t dd_compressed_bytes; 1709 uint64_t dd_uncompressed_bytes; 1710 } mdb_dsl_dir_phys_t; 1711 1712 typedef struct space_data { 1713 uint64_t ms_alloctree[TXG_SIZE]; 1714 uint64_t ms_freetree[TXG_SIZE]; 1715 uint64_t ms_tree; 1716 uint64_t avail; 1717 uint64_t nowavail; 1718 } space_data_t; 1719 1720 /* ARGSUSED */ 1721 static int 1722 space_cb(uintptr_t addr, const void *unknown, void *arg) 1723 { 1724 space_data_t *sd = arg; 1725 mdb_metaslab_t ms; 1726 mdb_range_tree_t rt; 1727 mdb_space_map_t sm = { 0 }; 1728 mdb_space_map_phys_t smp = { 0 }; 1729 int i; 1730 1731 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t", 1732 addr, 0) == -1) 1733 return (WALK_ERR); 1734 1735 for (i = 0; i < TXG_SIZE; i++) { 1736 if (mdb_ctf_vread(&rt, "range_tree_t", 1737 "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1) 1738 return (WALK_ERR); 1739 1740 sd->ms_alloctree[i] += rt.rt_space; 1741 1742 if (mdb_ctf_vread(&rt, "range_tree_t", 1743 "mdb_range_tree_t", ms.ms_freetree[i], 0) == -1) 1744 return (WALK_ERR); 1745 1746 sd->ms_freetree[i] += rt.rt_space; 1747 } 1748 1749 if (mdb_ctf_vread(&rt, "range_tree_t", 1750 "mdb_range_tree_t", ms.ms_tree, 0) == -1) 1751 return (WALK_ERR); 1752 1753 if (ms.ms_sm != NULL && 1754 mdb_ctf_vread(&sm, "space_map_t", 1755 "mdb_space_map_t", ms.ms_sm, 0) == -1) 1756 return (WALK_ERR); 1757 1758 if (sm.sm_phys != NULL) { 1759 (void) mdb_ctf_vread(&smp, "space_map_phys_t", 1760 "mdb_space_map_phys_t", sm.sm_phys, 0); 1761 } 1762 1763 sd->ms_tree += rt.rt_space; 1764 sd->avail += sm.sm_size - sm.sm_alloc; 1765 sd->nowavail += sm.sm_size - smp.smp_alloc; 1766 1767 return (WALK_NEXT); 1768 } 1769 1770 /* 1771 * ::spa_space [-b] 1772 * 1773 * Given a spa_t, print out it's on-disk space usage and in-core 1774 * estimates of future usage. If -b is given, print space in bytes. 1775 * Otherwise print in megabytes. 1776 */ 1777 /* ARGSUSED */ 1778 static int 1779 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1780 { 1781 mdb_spa_t spa; 1782 mdb_dsl_pool_t dp; 1783 mdb_dsl_dir_t dd; 1784 mdb_dmu_buf_impl_t db; 1785 mdb_dsl_dir_phys_t dsp; 1786 space_data_t sd; 1787 int shift = 20; 1788 char *suffix = "M"; 1789 int bytes = B_FALSE; 1790 1791 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) != 1792 argc) 1793 return (DCMD_USAGE); 1794 if (!(flags & DCMD_ADDRSPEC)) 1795 return (DCMD_USAGE); 1796 1797 if (bytes) { 1798 shift = 0; 1799 suffix = ""; 1800 } 1801 1802 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t", 1803 addr, 0) == -1 || 1804 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t", 1805 spa.spa_dsl_pool, 0) == -1 || 1806 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t", 1807 dp.dp_root_dir, 0) == -1 || 1808 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t", 1809 dd.dd_dbuf, 0) == -1 || 1810 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys", 1811 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) { 1812 return (DCMD_ERR); 1813 } 1814 1815 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n", 1816 dd.dd_space_towrite[0] >> shift, suffix, 1817 dd.dd_space_towrite[1] >> shift, suffix, 1818 dd.dd_space_towrite[2] >> shift, suffix, 1819 dd.dd_space_towrite[3] >> shift, suffix); 1820 1821 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n", 1822 dsp.dd_used_bytes >> shift, suffix); 1823 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n", 1824 dsp.dd_compressed_bytes >> shift, suffix); 1825 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n", 1826 dsp.dd_uncompressed_bytes >> shift, suffix); 1827 1828 bzero(&sd, sizeof (sd)); 1829 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) { 1830 mdb_warn("can't walk metaslabs"); 1831 return (DCMD_ERR); 1832 } 1833 1834 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n", 1835 sd.ms_alloctree[0] >> shift, suffix, 1836 sd.ms_alloctree[1] >> shift, suffix, 1837 sd.ms_alloctree[2] >> shift, suffix, 1838 sd.ms_alloctree[3] >> shift, suffix); 1839 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n", 1840 sd.ms_freetree[0] >> shift, suffix, 1841 sd.ms_freetree[1] >> shift, suffix, 1842 sd.ms_freetree[2] >> shift, suffix, 1843 sd.ms_freetree[3] >> shift, suffix); 1844 mdb_printf("ms_tree = %llu%s\n", sd.ms_tree >> shift, suffix); 1845 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix); 1846 mdb_printf("current syncing avail = %llu%s\n", 1847 sd.nowavail >> shift, suffix); 1848 1849 return (DCMD_OK); 1850 } 1851 1852 typedef struct mdb_spa_aux_vdev { 1853 int sav_count; 1854 uintptr_t sav_vdevs; 1855 } mdb_spa_aux_vdev_t; 1856 1857 typedef struct mdb_spa_vdevs { 1858 uintptr_t spa_root_vdev; 1859 mdb_spa_aux_vdev_t spa_l2cache; 1860 mdb_spa_aux_vdev_t spa_spares; 1861 } mdb_spa_vdevs_t; 1862 1863 static int 1864 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v, 1865 const char *name) 1866 { 1867 uintptr_t *aux; 1868 size_t len; 1869 int ret, i; 1870 1871 /* 1872 * Iterate over aux vdevs and print those out as well. This is a 1873 * little annoying because we don't have a root vdev to pass to ::vdev. 1874 * Instead, we print a single line and then call it for each child 1875 * vdev. 1876 */ 1877 if (sav->sav_count != 0) { 1878 v[1].a_type = MDB_TYPE_STRING; 1879 v[1].a_un.a_str = "-d"; 1880 v[2].a_type = MDB_TYPE_IMMEDIATE; 1881 v[2].a_un.a_val = 2; 1882 1883 len = sav->sav_count * sizeof (uintptr_t); 1884 aux = mdb_alloc(len, UM_SLEEP); 1885 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) { 1886 mdb_free(aux, len); 1887 mdb_warn("failed to read l2cache vdevs at %p", 1888 sav->sav_vdevs); 1889 return (DCMD_ERR); 1890 } 1891 1892 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name); 1893 1894 for (i = 0; i < sav->sav_count; i++) { 1895 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v); 1896 if (ret != DCMD_OK) { 1897 mdb_free(aux, len); 1898 return (ret); 1899 } 1900 } 1901 1902 mdb_free(aux, len); 1903 } 1904 1905 return (0); 1906 } 1907 1908 /* 1909 * ::spa_vdevs 1910 * 1911 * -e Include error stats 1912 * -m Include metaslab information 1913 * -M Include metaslab group information 1914 * -h Include histogram information (requires -m or -M) 1915 * 1916 * Print out a summarized list of vdevs for the given spa_t. 1917 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as 1918 * iterating over the cache devices. 1919 */ 1920 /* ARGSUSED */ 1921 static int 1922 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 1923 { 1924 mdb_arg_t v[3]; 1925 int ret; 1926 char opts[100] = "-r"; 1927 int spa_flags = 0; 1928 1929 if (mdb_getopts(argc, argv, 1930 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags, 1931 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags, 1932 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags, 1933 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags, 1934 NULL) != argc) 1935 return (DCMD_USAGE); 1936 1937 if (!(flags & DCMD_ADDRSPEC)) 1938 return (DCMD_USAGE); 1939 1940 mdb_spa_vdevs_t spa; 1941 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1) 1942 return (DCMD_ERR); 1943 1944 /* 1945 * Unitialized spa_t structures can have a NULL root vdev. 1946 */ 1947 if (spa.spa_root_vdev == NULL) { 1948 mdb_printf("no associated vdevs\n"); 1949 return (DCMD_OK); 1950 } 1951 1952 if (spa_flags & SPA_FLAG_ERRORS) 1953 strcat(opts, "e"); 1954 if (spa_flags & SPA_FLAG_METASLABS) 1955 strcat(opts, "m"); 1956 if (spa_flags & SPA_FLAG_METASLAB_GROUPS) 1957 strcat(opts, "M"); 1958 if (spa_flags & SPA_FLAG_HISTOGRAMS) 1959 strcat(opts, "h"); 1960 1961 v[0].a_type = MDB_TYPE_STRING; 1962 v[0].a_un.a_str = opts; 1963 1964 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev, 1965 flags, 1, v); 1966 if (ret != DCMD_OK) 1967 return (ret); 1968 1969 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 || 1970 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0) 1971 return (DCMD_ERR); 1972 1973 return (DCMD_OK); 1974 } 1975 1976 /* 1977 * ::zio 1978 * 1979 * Print a summary of zio_t and all its children. This is intended to display a 1980 * zio tree, and hence we only pick the most important pieces of information for 1981 * the main summary. More detailed information can always be found by doing a 1982 * '::print zio' on the underlying zio_t. The columns we display are: 1983 * 1984 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED 1985 * 1986 * The 'address' column is indented by one space for each depth level as we 1987 * descend down the tree. 1988 */ 1989 1990 #define ZIO_MAXINDENT 7 1991 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT) 1992 #define ZIO_WALK_SELF 0 1993 #define ZIO_WALK_CHILD 1 1994 #define ZIO_WALK_PARENT 2 1995 1996 typedef struct zio_print_args { 1997 int zpa_current_depth; 1998 int zpa_min_depth; 1999 int zpa_max_depth; 2000 int zpa_type; 2001 uint_t zpa_flags; 2002 } zio_print_args_t; 2003 2004 typedef struct mdb_zio { 2005 enum zio_type io_type; 2006 enum zio_stage io_stage; 2007 uintptr_t io_waiter; 2008 uintptr_t io_spa; 2009 struct { 2010 struct { 2011 uintptr_t list_next; 2012 } list_head; 2013 } io_parent_list; 2014 int io_error; 2015 } mdb_zio_t; 2016 2017 typedef struct mdb_zio_timestamp { 2018 hrtime_t io_timestamp; 2019 } mdb_zio_timestamp_t; 2020 2021 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg); 2022 2023 static int 2024 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa) 2025 { 2026 mdb_ctf_id_t type_enum, stage_enum; 2027 int indent = zpa->zpa_current_depth; 2028 const char *type, *stage; 2029 uintptr_t laddr; 2030 mdb_zio_t zio; 2031 mdb_zio_timestamp_t zio_timestamp = { 0 }; 2032 2033 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1) 2034 return (WALK_ERR); 2035 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio", 2036 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET); 2037 2038 if (indent > ZIO_MAXINDENT) 2039 indent = ZIO_MAXINDENT; 2040 2041 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 || 2042 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) { 2043 mdb_warn("failed to lookup zio enums"); 2044 return (WALK_ERR); 2045 } 2046 2047 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL) 2048 type += sizeof ("ZIO_TYPE_") - 1; 2049 else 2050 type = "?"; 2051 2052 if (zio.io_error == 0) { 2053 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage); 2054 if (stage != NULL) 2055 stage += sizeof ("ZIO_STAGE_") - 1; 2056 else 2057 stage = "?"; 2058 } else { 2059 stage = "FAILED"; 2060 } 2061 2062 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) { 2063 if (zpa->zpa_flags & DCMD_PIPE_OUT) { 2064 mdb_printf("%?p\n", addr); 2065 } else { 2066 mdb_printf("%*s%-*p %-5s %-16s ", indent, "", 2067 ZIO_MAXWIDTH - indent, addr, type, stage); 2068 if (zio.io_waiter != 0) 2069 mdb_printf("%-16lx ", zio.io_waiter); 2070 else 2071 mdb_printf("%-16s ", "-"); 2072 #ifdef _KERNEL 2073 if (zio_timestamp.io_timestamp != 0) { 2074 mdb_printf("%llums", (mdb_gethrtime() - 2075 zio_timestamp.io_timestamp) / 2076 1000000); 2077 } else { 2078 mdb_printf("%-12s ", "-"); 2079 } 2080 #else 2081 mdb_printf("%-12s ", "-"); 2082 #endif 2083 mdb_printf("\n"); 2084 } 2085 } 2086 2087 if (zpa->zpa_current_depth >= zpa->zpa_max_depth) 2088 return (WALK_NEXT); 2089 2090 if (zpa->zpa_type == ZIO_WALK_PARENT) 2091 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2092 "io_parent_list"); 2093 else 2094 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", 2095 "io_child_list"); 2096 2097 zpa->zpa_current_depth++; 2098 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) { 2099 mdb_warn("failed to walk zio_t children at %p\n", laddr); 2100 return (WALK_ERR); 2101 } 2102 zpa->zpa_current_depth--; 2103 2104 return (WALK_NEXT); 2105 } 2106 2107 /* ARGSUSED */ 2108 static int 2109 zio_child_cb(uintptr_t addr, const void *unknown, void *arg) 2110 { 2111 zio_link_t zl; 2112 uintptr_t ziop; 2113 zio_print_args_t *zpa = arg; 2114 2115 if (mdb_vread(&zl, sizeof (zl), addr) == -1) { 2116 mdb_warn("failed to read zio_link_t at %p", addr); 2117 return (WALK_ERR); 2118 } 2119 2120 if (zpa->zpa_type == ZIO_WALK_PARENT) 2121 ziop = (uintptr_t)zl.zl_parent; 2122 else 2123 ziop = (uintptr_t)zl.zl_child; 2124 2125 return (zio_print_cb(ziop, zpa)); 2126 } 2127 2128 /* ARGSUSED */ 2129 static int 2130 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2131 { 2132 zio_print_args_t zpa = { 0 }; 2133 2134 if (!(flags & DCMD_ADDRSPEC)) 2135 return (DCMD_USAGE); 2136 2137 if (mdb_getopts(argc, argv, 2138 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth, 2139 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type, 2140 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type, 2141 NULL) != argc) 2142 return (DCMD_USAGE); 2143 2144 zpa.zpa_flags = flags; 2145 if (zpa.zpa_max_depth != 0) { 2146 if (zpa.zpa_type == ZIO_WALK_SELF) 2147 zpa.zpa_type = ZIO_WALK_CHILD; 2148 } else if (zpa.zpa_type != ZIO_WALK_SELF) { 2149 zpa.zpa_min_depth = 1; 2150 zpa.zpa_max_depth = 1; 2151 } 2152 2153 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) { 2154 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n", 2155 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER", 2156 "TIME_ELAPSED"); 2157 } 2158 2159 if (zio_print_cb(addr, &zpa) != WALK_NEXT) 2160 return (DCMD_ERR); 2161 2162 return (DCMD_OK); 2163 } 2164 2165 /* 2166 * [addr]::zio_state 2167 * 2168 * Print a summary of all zio_t structures on the system, or for a particular 2169 * pool. This is equivalent to '::walk zio_root | ::zio'. 2170 */ 2171 /*ARGSUSED*/ 2172 static int 2173 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2174 { 2175 /* 2176 * MDB will remember the last address of the pipeline, so if we don't 2177 * zero this we'll end up trying to walk zio structures for a 2178 * non-existent spa_t. 2179 */ 2180 if (!(flags & DCMD_ADDRSPEC)) 2181 addr = 0; 2182 2183 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr)); 2184 } 2185 2186 typedef struct txg_list_walk_data { 2187 uintptr_t lw_head[TXG_SIZE]; 2188 int lw_txgoff; 2189 int lw_maxoff; 2190 size_t lw_offset; 2191 void *lw_obj; 2192 } txg_list_walk_data_t; 2193 2194 static int 2195 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff) 2196 { 2197 txg_list_walk_data_t *lwd; 2198 txg_list_t list; 2199 int i; 2200 2201 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC); 2202 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) { 2203 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr); 2204 return (WALK_ERR); 2205 } 2206 2207 for (i = 0; i < TXG_SIZE; i++) 2208 lwd->lw_head[i] = (uintptr_t)list.tl_head[i]; 2209 lwd->lw_offset = list.tl_offset; 2210 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t), 2211 UM_SLEEP | UM_GC); 2212 lwd->lw_txgoff = txg; 2213 lwd->lw_maxoff = maxoff; 2214 2215 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2216 wsp->walk_data = lwd; 2217 2218 return (WALK_NEXT); 2219 } 2220 2221 static int 2222 txg_list_walk_init(mdb_walk_state_t *wsp) 2223 { 2224 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1)); 2225 } 2226 2227 static int 2228 txg_list0_walk_init(mdb_walk_state_t *wsp) 2229 { 2230 return (txg_list_walk_init_common(wsp, 0, 0)); 2231 } 2232 2233 static int 2234 txg_list1_walk_init(mdb_walk_state_t *wsp) 2235 { 2236 return (txg_list_walk_init_common(wsp, 1, 1)); 2237 } 2238 2239 static int 2240 txg_list2_walk_init(mdb_walk_state_t *wsp) 2241 { 2242 return (txg_list_walk_init_common(wsp, 2, 2)); 2243 } 2244 2245 static int 2246 txg_list3_walk_init(mdb_walk_state_t *wsp) 2247 { 2248 return (txg_list_walk_init_common(wsp, 3, 3)); 2249 } 2250 2251 static int 2252 txg_list_walk_step(mdb_walk_state_t *wsp) 2253 { 2254 txg_list_walk_data_t *lwd = wsp->walk_data; 2255 uintptr_t addr; 2256 txg_node_t *node; 2257 int status; 2258 2259 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) { 2260 lwd->lw_txgoff++; 2261 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff]; 2262 } 2263 2264 if (wsp->walk_addr == NULL) 2265 return (WALK_DONE); 2266 2267 addr = wsp->walk_addr - lwd->lw_offset; 2268 2269 if (mdb_vread(lwd->lw_obj, 2270 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) { 2271 mdb_warn("failed to read list element at %#lx", addr); 2272 return (WALK_ERR); 2273 } 2274 2275 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata); 2276 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset); 2277 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff]; 2278 2279 return (status); 2280 } 2281 2282 /* 2283 * ::walk spa 2284 * 2285 * Walk all named spa_t structures in the namespace. This is nothing more than 2286 * a layered avl walk. 2287 */ 2288 static int 2289 spa_walk_init(mdb_walk_state_t *wsp) 2290 { 2291 GElf_Sym sym; 2292 2293 if (wsp->walk_addr != NULL) { 2294 mdb_warn("spa walk only supports global walks\n"); 2295 return (WALK_ERR); 2296 } 2297 2298 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) { 2299 mdb_warn("failed to find symbol 'spa_namespace_avl'"); 2300 return (WALK_ERR); 2301 } 2302 2303 wsp->walk_addr = (uintptr_t)sym.st_value; 2304 2305 if (mdb_layered_walk("avl", wsp) == -1) { 2306 mdb_warn("failed to walk 'avl'\n"); 2307 return (WALK_ERR); 2308 } 2309 2310 return (WALK_NEXT); 2311 } 2312 2313 static int 2314 spa_walk_step(mdb_walk_state_t *wsp) 2315 { 2316 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata)); 2317 } 2318 2319 /* 2320 * [addr]::walk zio 2321 * 2322 * Walk all active zio_t structures on the system. This is simply a layered 2323 * walk on top of ::walk zio_cache, with the optional ability to limit the 2324 * structures to a particular pool. 2325 */ 2326 static int 2327 zio_walk_init(mdb_walk_state_t *wsp) 2328 { 2329 wsp->walk_data = (void *)wsp->walk_addr; 2330 2331 if (mdb_layered_walk("zio_cache", wsp) == -1) { 2332 mdb_warn("failed to walk 'zio_cache'\n"); 2333 return (WALK_ERR); 2334 } 2335 2336 return (WALK_NEXT); 2337 } 2338 2339 static int 2340 zio_walk_step(mdb_walk_state_t *wsp) 2341 { 2342 mdb_zio_t zio; 2343 uintptr_t spa = (uintptr_t)wsp->walk_data; 2344 2345 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2346 wsp->walk_addr, 0) == -1) 2347 return (WALK_ERR); 2348 2349 if (spa != 0 && spa != zio.io_spa) 2350 return (WALK_NEXT); 2351 2352 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2353 } 2354 2355 /* 2356 * [addr]::walk zio_root 2357 * 2358 * Walk only root zio_t structures, optionally for a particular spa_t. 2359 */ 2360 static int 2361 zio_walk_root_step(mdb_walk_state_t *wsp) 2362 { 2363 mdb_zio_t zio; 2364 uintptr_t spa = (uintptr_t)wsp->walk_data; 2365 2366 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", 2367 wsp->walk_addr, 0) == -1) 2368 return (WALK_ERR); 2369 2370 if (spa != 0 && spa != zio.io_spa) 2371 return (WALK_NEXT); 2372 2373 /* If the parent list is not empty, ignore */ 2374 if (zio.io_parent_list.list_head.list_next != 2375 wsp->walk_addr + 2376 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") + 2377 mdb_ctf_offsetof_by_name("struct list", "list_head")) 2378 return (WALK_NEXT); 2379 2380 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata)); 2381 } 2382 2383 /* 2384 * ::zfs_blkstats 2385 * 2386 * -v print verbose per-level information 2387 * 2388 */ 2389 static int 2390 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2391 { 2392 boolean_t verbose = B_FALSE; 2393 zfs_all_blkstats_t stats; 2394 dmu_object_type_t t; 2395 zfs_blkstat_t *tzb; 2396 uint64_t ditto; 2397 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10]; 2398 /* +10 in case it grew */ 2399 2400 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) { 2401 mdb_warn("failed to read 'dmu_ot'"); 2402 return (DCMD_ERR); 2403 } 2404 2405 if (mdb_getopts(argc, argv, 2406 'v', MDB_OPT_SETBITS, TRUE, &verbose, 2407 NULL) != argc) 2408 return (DCMD_USAGE); 2409 2410 if (!(flags & DCMD_ADDRSPEC)) 2411 return (DCMD_USAGE); 2412 2413 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) || 2414 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) || 2415 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) { 2416 mdb_warn("failed to read data at %p;", addr); 2417 mdb_printf("maybe no stats? run \"zpool scrub\" first."); 2418 return (DCMD_ERR); 2419 } 2420 2421 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL]; 2422 if (tzb->zb_gangs != 0) { 2423 mdb_printf("Ganged blocks: %llu\n", 2424 (longlong_t)tzb->zb_gangs); 2425 } 2426 2427 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev + 2428 tzb->zb_ditto_3_of_3_samevdev; 2429 if (ditto != 0) { 2430 mdb_printf("Dittoed blocks on same vdev: %llu\n", 2431 (longlong_t)ditto); 2432 } 2433 2434 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE" 2435 "\t avg\t comp\t%%Total\tType\n"); 2436 2437 for (t = 0; t <= DMU_OT_TOTAL; t++) { 2438 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN]; 2439 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN]; 2440 char avg[NICENUM_BUFLEN]; 2441 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN]; 2442 char typename[64]; 2443 int l; 2444 2445 2446 if (t == DMU_OT_DEFERRED) 2447 strcpy(typename, "deferred free"); 2448 else if (t == DMU_OT_OTHER) 2449 strcpy(typename, "other"); 2450 else if (t == DMU_OT_TOTAL) 2451 strcpy(typename, "Total"); 2452 else if (mdb_readstr(typename, sizeof (typename), 2453 (uintptr_t)dmu_ot[t].ot_name) == -1) { 2454 mdb_warn("failed to read type name"); 2455 return (DCMD_ERR); 2456 } 2457 2458 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0) 2459 continue; 2460 2461 for (l = -1; l < DN_MAX_LEVELS; l++) { 2462 int level = (l == -1 ? DN_MAX_LEVELS : l); 2463 zfs_blkstat_t *zb = &stats.zab_type[level][t]; 2464 2465 if (zb->zb_asize == 0) 2466 continue; 2467 2468 /* 2469 * Don't print each level unless requested. 2470 */ 2471 if (!verbose && level != DN_MAX_LEVELS) 2472 continue; 2473 2474 /* 2475 * If all the space is level 0, don't print the 2476 * level 0 separately. 2477 */ 2478 if (level == 0 && zb->zb_asize == 2479 stats.zab_type[DN_MAX_LEVELS][t].zb_asize) 2480 continue; 2481 2482 mdb_nicenum(zb->zb_count, csize); 2483 mdb_nicenum(zb->zb_lsize, lsize); 2484 mdb_nicenum(zb->zb_psize, psize); 2485 mdb_nicenum(zb->zb_asize, asize); 2486 mdb_nicenum(zb->zb_asize / zb->zb_count, avg); 2487 (void) snprintfrac(comp, NICENUM_BUFLEN, 2488 zb->zb_lsize, zb->zb_psize, 2); 2489 (void) snprintfrac(pct, NICENUM_BUFLEN, 2490 100 * zb->zb_asize, tzb->zb_asize, 2); 2491 2492 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s" 2493 "\t%5s\t%6s\t", 2494 csize, lsize, psize, asize, avg, comp, pct); 2495 2496 if (level == DN_MAX_LEVELS) 2497 mdb_printf("%s\n", typename); 2498 else 2499 mdb_printf(" L%d %s\n", 2500 level, typename); 2501 } 2502 } 2503 2504 return (DCMD_OK); 2505 } 2506 2507 typedef struct mdb_reference { 2508 uintptr_t ref_holder; 2509 uintptr_t ref_removed; 2510 uint64_t ref_number; 2511 } mdb_reference_t; 2512 2513 /* ARGSUSED */ 2514 static int 2515 reference_cb(uintptr_t addr, const void *ignored, void *arg) 2516 { 2517 mdb_reference_t ref; 2518 boolean_t holder_is_str = B_FALSE; 2519 char holder_str[128]; 2520 boolean_t removed = (boolean_t)arg; 2521 2522 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr, 2523 0) == -1) 2524 return (DCMD_ERR); 2525 2526 if (mdb_readstr(holder_str, sizeof (holder_str), 2527 ref.ref_holder) != -1) 2528 holder_is_str = strisprint(holder_str); 2529 2530 if (removed) 2531 mdb_printf("removed "); 2532 mdb_printf("reference "); 2533 if (ref.ref_number != 1) 2534 mdb_printf("with count=%llu ", ref.ref_number); 2535 mdb_printf("with tag %lx", ref.ref_holder); 2536 if (holder_is_str) 2537 mdb_printf(" \"%s\"", holder_str); 2538 mdb_printf(", held at:\n"); 2539 2540 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL); 2541 2542 if (removed) { 2543 mdb_printf("removed at:\n"); 2544 (void) mdb_call_dcmd("whatis", ref.ref_removed, 2545 DCMD_ADDRSPEC, 0, NULL); 2546 } 2547 2548 mdb_printf("\n"); 2549 2550 return (WALK_NEXT); 2551 } 2552 2553 typedef struct mdb_refcount { 2554 uint64_t rc_count; 2555 } mdb_refcount_t; 2556 2557 typedef struct mdb_refcount_removed { 2558 uint64_t rc_removed_count; 2559 } mdb_refcount_removed_t; 2560 2561 typedef struct mdb_refcount_tracked { 2562 boolean_t rc_tracked; 2563 } mdb_refcount_tracked_t; 2564 2565 /* ARGSUSED */ 2566 static int 2567 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2568 { 2569 mdb_refcount_t rc; 2570 mdb_refcount_removed_t rcr; 2571 mdb_refcount_tracked_t rct; 2572 int off; 2573 boolean_t released = B_FALSE; 2574 2575 if (!(flags & DCMD_ADDRSPEC)) 2576 return (DCMD_USAGE); 2577 2578 if (mdb_getopts(argc, argv, 2579 'r', MDB_OPT_SETBITS, B_TRUE, &released, 2580 NULL) != argc) 2581 return (DCMD_USAGE); 2582 2583 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr, 2584 0) == -1) 2585 return (DCMD_ERR); 2586 2587 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr, 2588 MDB_CTF_VREAD_QUIET) == -1) { 2589 mdb_printf("refcount_t at %p has %llu holds (untracked)\n", 2590 addr, (longlong_t)rc.rc_count); 2591 return (DCMD_OK); 2592 } 2593 2594 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr, 2595 MDB_CTF_VREAD_QUIET) == -1) { 2596 /* If this is an old target, it might be tracked. */ 2597 rct.rc_tracked = B_TRUE; 2598 } 2599 2600 mdb_printf("refcount_t at %p has %llu current holds, " 2601 "%llu recently released holds\n", 2602 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count); 2603 2604 if (rct.rc_tracked && rc.rc_count > 0) 2605 mdb_printf("current holds:\n"); 2606 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list"); 2607 if (off == -1) 2608 return (DCMD_ERR); 2609 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off); 2610 2611 if (released && rcr.rc_removed_count > 0) { 2612 mdb_printf("released holds:\n"); 2613 2614 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed"); 2615 if (off == -1) 2616 return (DCMD_ERR); 2617 mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off); 2618 } 2619 2620 return (DCMD_OK); 2621 } 2622 2623 /* ARGSUSED */ 2624 static int 2625 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2626 { 2627 sa_attr_table_t *table; 2628 sa_os_t sa_os; 2629 char *name; 2630 int i; 2631 2632 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) { 2633 mdb_warn("failed to read sa_os at %p", addr); 2634 return (DCMD_ERR); 2635 } 2636 2637 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2638 UM_SLEEP | UM_GC); 2639 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC); 2640 2641 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs, 2642 (uintptr_t)sa_os.sa_attr_table) == -1) { 2643 mdb_warn("failed to read sa_os at %p", addr); 2644 return (DCMD_ERR); 2645 } 2646 2647 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n", 2648 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME"); 2649 for (i = 0; i != sa_os.sa_num_attrs; i++) { 2650 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name); 2651 mdb_printf("%5x %8x %8x %8x %-s\n", 2652 (int)table[i].sa_attr, (int)table[i].sa_registered, 2653 (int)table[i].sa_length, table[i].sa_byteswap, name); 2654 } 2655 2656 return (DCMD_OK); 2657 } 2658 2659 static int 2660 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count) 2661 { 2662 uintptr_t idx_table; 2663 2664 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) { 2665 mdb_printf("can't find offset table in sa_idx_tab\n"); 2666 return (-1); 2667 } 2668 2669 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t), 2670 UM_SLEEP | UM_GC); 2671 2672 if (mdb_vread(*off_tab, 2673 attr_count * sizeof (uint32_t), idx_table) == -1) { 2674 mdb_warn("failed to attribute offset table %p", idx_table); 2675 return (-1); 2676 } 2677 2678 return (DCMD_OK); 2679 } 2680 2681 /*ARGSUSED*/ 2682 static int 2683 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2684 { 2685 uint32_t *offset_tab; 2686 int attr_count; 2687 uint64_t attr_id; 2688 uintptr_t attr_addr; 2689 uintptr_t bonus_tab, spill_tab; 2690 uintptr_t db_bonus, db_spill; 2691 uintptr_t os, os_sa; 2692 uintptr_t db_data; 2693 2694 if (argc != 1) 2695 return (DCMD_USAGE); 2696 2697 if (argv[0].a_type == MDB_TYPE_STRING) 2698 attr_id = mdb_strtoull(argv[0].a_un.a_str); 2699 else 2700 return (DCMD_USAGE); 2701 2702 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) || 2703 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) || 2704 GETMEMB(addr, "sa_handle", sa_os, os) || 2705 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) || 2706 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) { 2707 mdb_printf("Can't find necessary information in sa_handle " 2708 "in sa_handle\n"); 2709 return (DCMD_ERR); 2710 } 2711 2712 if (GETMEMB(os, "objset", os_sa, os_sa)) { 2713 mdb_printf("Can't find os_sa in objset\n"); 2714 return (DCMD_ERR); 2715 } 2716 2717 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) { 2718 mdb_printf("Can't find sa_num_attrs\n"); 2719 return (DCMD_ERR); 2720 } 2721 2722 if (attr_id > attr_count) { 2723 mdb_printf("attribute id number is out of range\n"); 2724 return (DCMD_ERR); 2725 } 2726 2727 if (bonus_tab) { 2728 if (sa_get_off_table(bonus_tab, &offset_tab, 2729 attr_count) == -1) { 2730 return (DCMD_ERR); 2731 } 2732 2733 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) { 2734 mdb_printf("can't find db_data in bonus dbuf\n"); 2735 return (DCMD_ERR); 2736 } 2737 } 2738 2739 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) && 2740 spill_tab == NULL) { 2741 mdb_printf("Attribute does not exist\n"); 2742 return (DCMD_ERR); 2743 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) { 2744 if (sa_get_off_table(spill_tab, &offset_tab, 2745 attr_count) == -1) { 2746 return (DCMD_ERR); 2747 } 2748 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) { 2749 mdb_printf("can't find db_data in spill dbuf\n"); 2750 return (DCMD_ERR); 2751 } 2752 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) { 2753 mdb_printf("Attribute does not exist\n"); 2754 return (DCMD_ERR); 2755 } 2756 } 2757 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]); 2758 mdb_printf("%p\n", attr_addr); 2759 return (DCMD_OK); 2760 } 2761 2762 /* ARGSUSED */ 2763 static int 2764 zfs_ace_print_common(uintptr_t addr, uint_t flags, 2765 uint64_t id, uint32_t access_mask, uint16_t ace_flags, 2766 uint16_t ace_type, int verbose) 2767 { 2768 if (DCMD_HDRSPEC(flags) && !verbose) 2769 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n", 2770 "ADDR", "FLAGS", "MASK", "TYPE", "ID"); 2771 2772 if (!verbose) { 2773 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr, 2774 ace_flags, access_mask, ace_type, id); 2775 return (DCMD_OK); 2776 } 2777 2778 switch (ace_flags & ACE_TYPE_FLAGS) { 2779 case ACE_OWNER: 2780 mdb_printf("owner@:"); 2781 break; 2782 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 2783 mdb_printf("group@:"); 2784 break; 2785 case ACE_EVERYONE: 2786 mdb_printf("everyone@:"); 2787 break; 2788 case ACE_IDENTIFIER_GROUP: 2789 mdb_printf("group:%llx:", (u_longlong_t)id); 2790 break; 2791 case 0: /* User entry */ 2792 mdb_printf("user:%llx:", (u_longlong_t)id); 2793 break; 2794 } 2795 2796 /* print out permission mask */ 2797 if (access_mask & ACE_READ_DATA) 2798 mdb_printf("r"); 2799 else 2800 mdb_printf("-"); 2801 if (access_mask & ACE_WRITE_DATA) 2802 mdb_printf("w"); 2803 else 2804 mdb_printf("-"); 2805 if (access_mask & ACE_EXECUTE) 2806 mdb_printf("x"); 2807 else 2808 mdb_printf("-"); 2809 if (access_mask & ACE_APPEND_DATA) 2810 mdb_printf("p"); 2811 else 2812 mdb_printf("-"); 2813 if (access_mask & ACE_DELETE) 2814 mdb_printf("d"); 2815 else 2816 mdb_printf("-"); 2817 if (access_mask & ACE_DELETE_CHILD) 2818 mdb_printf("D"); 2819 else 2820 mdb_printf("-"); 2821 if (access_mask & ACE_READ_ATTRIBUTES) 2822 mdb_printf("a"); 2823 else 2824 mdb_printf("-"); 2825 if (access_mask & ACE_WRITE_ATTRIBUTES) 2826 mdb_printf("A"); 2827 else 2828 mdb_printf("-"); 2829 if (access_mask & ACE_READ_NAMED_ATTRS) 2830 mdb_printf("R"); 2831 else 2832 mdb_printf("-"); 2833 if (access_mask & ACE_WRITE_NAMED_ATTRS) 2834 mdb_printf("W"); 2835 else 2836 mdb_printf("-"); 2837 if (access_mask & ACE_READ_ACL) 2838 mdb_printf("c"); 2839 else 2840 mdb_printf("-"); 2841 if (access_mask & ACE_WRITE_ACL) 2842 mdb_printf("C"); 2843 else 2844 mdb_printf("-"); 2845 if (access_mask & ACE_WRITE_OWNER) 2846 mdb_printf("o"); 2847 else 2848 mdb_printf("-"); 2849 if (access_mask & ACE_SYNCHRONIZE) 2850 mdb_printf("s"); 2851 else 2852 mdb_printf("-"); 2853 2854 mdb_printf(":"); 2855 2856 /* Print out inheritance flags */ 2857 if (ace_flags & ACE_FILE_INHERIT_ACE) 2858 mdb_printf("f"); 2859 else 2860 mdb_printf("-"); 2861 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE) 2862 mdb_printf("d"); 2863 else 2864 mdb_printf("-"); 2865 if (ace_flags & ACE_INHERIT_ONLY_ACE) 2866 mdb_printf("i"); 2867 else 2868 mdb_printf("-"); 2869 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE) 2870 mdb_printf("n"); 2871 else 2872 mdb_printf("-"); 2873 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG) 2874 mdb_printf("S"); 2875 else 2876 mdb_printf("-"); 2877 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG) 2878 mdb_printf("F"); 2879 else 2880 mdb_printf("-"); 2881 if (ace_flags & ACE_INHERITED_ACE) 2882 mdb_printf("I"); 2883 else 2884 mdb_printf("-"); 2885 2886 switch (ace_type) { 2887 case ACE_ACCESS_ALLOWED_ACE_TYPE: 2888 mdb_printf(":allow\n"); 2889 break; 2890 case ACE_ACCESS_DENIED_ACE_TYPE: 2891 mdb_printf(":deny\n"); 2892 break; 2893 case ACE_SYSTEM_AUDIT_ACE_TYPE: 2894 mdb_printf(":audit\n"); 2895 break; 2896 case ACE_SYSTEM_ALARM_ACE_TYPE: 2897 mdb_printf(":alarm\n"); 2898 break; 2899 default: 2900 mdb_printf(":?\n"); 2901 } 2902 return (DCMD_OK); 2903 } 2904 2905 /* ARGSUSED */ 2906 static int 2907 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2908 { 2909 zfs_ace_t zace; 2910 int verbose = FALSE; 2911 uint64_t id; 2912 2913 if (!(flags & DCMD_ADDRSPEC)) 2914 return (DCMD_USAGE); 2915 2916 if (mdb_getopts(argc, argv, 2917 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2918 return (DCMD_USAGE); 2919 2920 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) { 2921 mdb_warn("failed to read zfs_ace_t"); 2922 return (DCMD_ERR); 2923 } 2924 2925 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 || 2926 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2927 id = zace.z_fuid; 2928 else 2929 id = -1; 2930 2931 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask, 2932 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose)); 2933 } 2934 2935 /* ARGSUSED */ 2936 static int 2937 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 2938 { 2939 ace_t ace; 2940 uint64_t id; 2941 int verbose = FALSE; 2942 2943 if (!(flags & DCMD_ADDRSPEC)) 2944 return (DCMD_USAGE); 2945 2946 if (mdb_getopts(argc, argv, 2947 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 2948 return (DCMD_USAGE); 2949 2950 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) { 2951 mdb_warn("failed to read ace_t"); 2952 return (DCMD_ERR); 2953 } 2954 2955 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 || 2956 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP) 2957 id = ace.a_who; 2958 else 2959 id = -1; 2960 2961 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask, 2962 ace.a_flags, ace.a_type, verbose)); 2963 } 2964 2965 typedef struct acl_dump_args { 2966 int a_argc; 2967 const mdb_arg_t *a_argv; 2968 uint16_t a_version; 2969 int a_flags; 2970 } acl_dump_args_t; 2971 2972 /* ARGSUSED */ 2973 static int 2974 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg) 2975 { 2976 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 2977 2978 if (acl_args->a_version == 1) { 2979 if (mdb_call_dcmd("zfs_ace", addr, 2980 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2981 acl_args->a_argv) != DCMD_OK) { 2982 return (WALK_ERR); 2983 } 2984 } else { 2985 if (mdb_call_dcmd("zfs_ace0", addr, 2986 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc, 2987 acl_args->a_argv) != DCMD_OK) { 2988 return (WALK_ERR); 2989 } 2990 } 2991 acl_args->a_flags = DCMD_LOOP; 2992 return (WALK_NEXT); 2993 } 2994 2995 /* ARGSUSED */ 2996 static int 2997 acl_cb(uintptr_t addr, const void *unknown, void *arg) 2998 { 2999 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg; 3000 3001 if (acl_args->a_version == 1) { 3002 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb, 3003 arg, addr) != 0) { 3004 mdb_warn("can't walk ACEs"); 3005 return (DCMD_ERR); 3006 } 3007 } else { 3008 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb, 3009 arg, addr) != 0) { 3010 mdb_warn("can't walk ACEs"); 3011 return (DCMD_ERR); 3012 } 3013 } 3014 return (WALK_NEXT); 3015 } 3016 3017 /* ARGSUSED */ 3018 static int 3019 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3020 { 3021 zfs_acl_t zacl; 3022 int verbose = FALSE; 3023 acl_dump_args_t acl_args; 3024 3025 if (!(flags & DCMD_ADDRSPEC)) 3026 return (DCMD_USAGE); 3027 3028 if (mdb_getopts(argc, argv, 3029 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc) 3030 return (DCMD_USAGE); 3031 3032 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) { 3033 mdb_warn("failed to read zfs_acl_t"); 3034 return (DCMD_ERR); 3035 } 3036 3037 acl_args.a_argc = argc; 3038 acl_args.a_argv = argv; 3039 acl_args.a_version = zacl.z_version; 3040 acl_args.a_flags = DCMD_LOOPFIRST; 3041 3042 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) { 3043 mdb_warn("can't walk ACL"); 3044 return (DCMD_ERR); 3045 } 3046 3047 return (DCMD_OK); 3048 } 3049 3050 /* ARGSUSED */ 3051 static int 3052 zfs_acl_node_walk_init(mdb_walk_state_t *wsp) 3053 { 3054 if (wsp->walk_addr == NULL) { 3055 mdb_warn("must supply address of zfs_acl_node_t\n"); 3056 return (WALK_ERR); 3057 } 3058 3059 wsp->walk_addr += 3060 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl"); 3061 3062 if (mdb_layered_walk("list", wsp) == -1) { 3063 mdb_warn("failed to walk 'list'\n"); 3064 return (WALK_ERR); 3065 } 3066 3067 return (WALK_NEXT); 3068 } 3069 3070 static int 3071 zfs_acl_node_walk_step(mdb_walk_state_t *wsp) 3072 { 3073 zfs_acl_node_t aclnode; 3074 3075 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t), 3076 wsp->walk_addr) == -1) { 3077 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr); 3078 return (WALK_ERR); 3079 } 3080 3081 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata)); 3082 } 3083 3084 typedef struct ace_walk_data { 3085 int ace_count; 3086 int ace_version; 3087 } ace_walk_data_t; 3088 3089 static int 3090 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version, 3091 int ace_count, uintptr_t ace_data) 3092 { 3093 ace_walk_data_t *ace_walk_data; 3094 3095 if (wsp->walk_addr == NULL) { 3096 mdb_warn("must supply address of zfs_acl_node_t\n"); 3097 return (WALK_ERR); 3098 } 3099 3100 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC); 3101 3102 ace_walk_data->ace_count = ace_count; 3103 ace_walk_data->ace_version = version; 3104 3105 wsp->walk_addr = ace_data; 3106 wsp->walk_data = ace_walk_data; 3107 3108 return (WALK_NEXT); 3109 } 3110 3111 static int 3112 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version) 3113 { 3114 static int gotid; 3115 static mdb_ctf_id_t acl_id; 3116 int z_ace_count; 3117 uintptr_t z_acldata; 3118 3119 if (!gotid) { 3120 if (mdb_ctf_lookup_by_name("struct zfs_acl_node", 3121 &acl_id) == -1) { 3122 mdb_warn("couldn't find struct zfs_acl_node"); 3123 return (DCMD_ERR); 3124 } 3125 gotid = TRUE; 3126 } 3127 3128 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) { 3129 return (DCMD_ERR); 3130 } 3131 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) { 3132 return (DCMD_ERR); 3133 } 3134 3135 return (zfs_aces_walk_init_common(wsp, version, 3136 z_ace_count, z_acldata)); 3137 } 3138 3139 /* ARGSUSED */ 3140 static int 3141 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp) 3142 { 3143 return (zfs_acl_node_aces_walk_init_common(wsp, 1)); 3144 } 3145 3146 /* ARGSUSED */ 3147 static int 3148 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp) 3149 { 3150 return (zfs_acl_node_aces_walk_init_common(wsp, 0)); 3151 } 3152 3153 static int 3154 zfs_aces_walk_step(mdb_walk_state_t *wsp) 3155 { 3156 ace_walk_data_t *ace_data = wsp->walk_data; 3157 zfs_ace_t zace; 3158 ace_t *acep; 3159 int status; 3160 int entry_type; 3161 int allow_type; 3162 uintptr_t ptr; 3163 3164 if (ace_data->ace_count == 0) 3165 return (WALK_DONE); 3166 3167 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) { 3168 mdb_warn("failed to read zfs_ace_t at %#lx", 3169 wsp->walk_addr); 3170 return (WALK_ERR); 3171 } 3172 3173 switch (ace_data->ace_version) { 3174 case 0: 3175 acep = (ace_t *)&zace; 3176 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 3177 allow_type = acep->a_type; 3178 break; 3179 case 1: 3180 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS; 3181 allow_type = zace.z_hdr.z_type; 3182 break; 3183 default: 3184 return (WALK_ERR); 3185 } 3186 3187 ptr = (uintptr_t)wsp->walk_addr; 3188 switch (entry_type) { 3189 case ACE_OWNER: 3190 case ACE_EVERYONE: 3191 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 3192 ptr += ace_data->ace_version == 0 ? 3193 sizeof (ace_t) : sizeof (zfs_ace_hdr_t); 3194 break; 3195 case ACE_IDENTIFIER_GROUP: 3196 default: 3197 switch (allow_type) { 3198 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 3199 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 3200 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 3201 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 3202 ptr += ace_data->ace_version == 0 ? 3203 sizeof (ace_t) : sizeof (zfs_object_ace_t); 3204 break; 3205 default: 3206 ptr += ace_data->ace_version == 0 ? 3207 sizeof (ace_t) : sizeof (zfs_ace_t); 3208 break; 3209 } 3210 } 3211 3212 ace_data->ace_count--; 3213 status = wsp->walk_callback(wsp->walk_addr, 3214 (void *)(uintptr_t)&zace, wsp->walk_cbdata); 3215 3216 wsp->walk_addr = ptr; 3217 return (status); 3218 } 3219 3220 typedef struct mdb_zfs_rrwlock { 3221 uintptr_t rr_writer; 3222 boolean_t rr_writer_wanted; 3223 } mdb_zfs_rrwlock_t; 3224 3225 static uint_t rrw_key; 3226 3227 /* ARGSUSED */ 3228 static int 3229 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 3230 { 3231 mdb_zfs_rrwlock_t rrw; 3232 3233 if (rrw_key == 0) { 3234 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1) 3235 return (DCMD_ERR); 3236 } 3237 3238 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr, 3239 0) == -1) 3240 return (DCMD_ERR); 3241 3242 if (rrw.rr_writer != 0) { 3243 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer); 3244 return (DCMD_OK); 3245 } 3246 3247 if (rrw.rr_writer_wanted) { 3248 mdb_printf("writer wanted\n"); 3249 } 3250 3251 mdb_printf("anonymous references:\n"); 3252 (void) mdb_call_dcmd("refcount", addr + 3253 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"), 3254 DCMD_ADDRSPEC, 0, NULL); 3255 3256 mdb_printf("linked references:\n"); 3257 (void) mdb_call_dcmd("refcount", addr + 3258 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"), 3259 DCMD_ADDRSPEC, 0, NULL); 3260 3261 /* 3262 * XXX This should find references from 3263 * "::walk thread | ::tsd -v <rrw_key>", but there is no support 3264 * for programmatic consumption of dcmds, so this would be 3265 * difficult, potentially requiring reimplementing ::tsd (both 3266 * user and kernel versions) in this MDB module. 3267 */ 3268 3269 return (DCMD_OK); 3270 } 3271 3272 /* 3273 * MDB module linkage information: 3274 * 3275 * We declare a list of structures describing our dcmds, and a function 3276 * named _mdb_init to return a pointer to our module information. 3277 */ 3278 3279 static const mdb_dcmd_t dcmds[] = { 3280 { "arc", "[-bkmg]", "print ARC variables", arc_print }, 3281 { "blkptr", ":", "print blkptr_t", blkptr }, 3282 { "dbuf", ":", "print dmu_buf_impl_t", dbuf }, 3283 { "dbuf_stats", ":", "dbuf stats", dbuf_stats }, 3284 { "dbufs", 3285 "\t[-O objset_t*] [-n objset_name | \"mos\"] " 3286 "[-o object | \"mdn\"] \n" 3287 "\t[-l level] [-b blkid | \"bonus\"]", 3288 "find dmu_buf_impl_t's that match specified criteria", dbufs }, 3289 { "abuf_find", "dva_word[0] dva_word[1]", 3290 "find arc_buf_hdr_t of a specified DVA", 3291 abuf_find }, 3292 { "spa", "?[-cevmMh]\n" 3293 "\t-c display spa config\n" 3294 "\t-e display vdev statistics\n" 3295 "\t-v display vdev information\n" 3296 "\t-m display metaslab statistics\n" 3297 "\t-M display metaslab group statistics\n" 3298 "\t-h display histogram (requires -m or -M)\n", 3299 "spa_t summary", spa_print }, 3300 { "spa_config", ":", "print spa_t configuration", spa_print_config }, 3301 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space }, 3302 { "spa_vdevs", ":[-emMh]\n" 3303 "\t-e display vdev statistics\n" 3304 "\t-m dispaly metaslab statistics\n" 3305 "\t-M display metaslab group statistic\n" 3306 "\t-h display histogram (requires -m or -M)\n", 3307 "given a spa_t, print vdev summary", spa_vdevs }, 3308 { "vdev", ":[-re]\n" 3309 "\t-r display recursively\n" 3310 "\t-e display statistics\n" 3311 "\t-m display metaslab statistics\n" 3312 "\t-M display metaslab group statistics\n" 3313 "\t-h display histogram (requires -m or -M)\n", 3314 "vdev_t summary", vdev_print }, 3315 { "zio", ":[-cpr]\n" 3316 "\t-c display children\n" 3317 "\t-p display parents\n" 3318 "\t-r display recursively", 3319 "zio_t summary", zio_print }, 3320 { "zio_state", "?", "print out all zio_t structures on system or " 3321 "for a particular pool", zio_state }, 3322 { "zfs_blkstats", ":[-v]", 3323 "given a spa_t, print block type stats from last scrub", 3324 zfs_blkstats }, 3325 { "zfs_params", "", "print zfs tunable parameters", zfs_params }, 3326 { "refcount", ":[-r]\n" 3327 "\t-r display recently removed references", 3328 "print refcount_t holders", refcount }, 3329 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf }, 3330 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t", 3331 zfs_acl_dump }, 3332 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print }, 3333 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print }, 3334 { "sa_attr_table", ":", "print SA attribute table from sa_os_t", 3335 sa_attr_table}, 3336 { "sa_attr", ": attr_id", 3337 "print SA attribute address when given sa_handle_t", sa_attr_print}, 3338 { "zfs_dbgmsg", ":[-va]", 3339 "print zfs debug log", dbgmsg}, 3340 { "rrwlock", ":", 3341 "print rrwlock_t, including readers", rrwlock}, 3342 { NULL } 3343 }; 3344 3345 static const mdb_walker_t walkers[] = { 3346 { "zms_freelist", "walk ZFS metaslab freelist", 3347 freelist_walk_init, freelist_walk_step, NULL }, 3348 { "txg_list", "given any txg_list_t *, walk all entries in all txgs", 3349 txg_list_walk_init, txg_list_walk_step, NULL }, 3350 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0", 3351 txg_list0_walk_init, txg_list_walk_step, NULL }, 3352 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1", 3353 txg_list1_walk_init, txg_list_walk_step, NULL }, 3354 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2", 3355 txg_list2_walk_init, txg_list_walk_step, NULL }, 3356 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3", 3357 txg_list3_walk_init, txg_list_walk_step, NULL }, 3358 { "zio", "walk all zio structures, optionally for a particular spa_t", 3359 zio_walk_init, zio_walk_step, NULL }, 3360 { "zio_root", 3361 "walk all root zio_t structures, optionally for a particular spa_t", 3362 zio_walk_init, zio_walk_root_step, NULL }, 3363 { "spa", "walk all spa_t entries in the namespace", 3364 spa_walk_init, spa_walk_step, NULL }, 3365 { "metaslab", "given a spa_t *, walk all metaslab_t structures", 3366 metaslab_walk_init, metaslab_walk_step, NULL }, 3367 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes", 3368 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL }, 3369 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs", 3370 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL }, 3371 { "zfs_acl_node_aces0", 3372 "given a zfs_acl_node_t, walk all ACEs as ace_t", 3373 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL }, 3374 { NULL } 3375 }; 3376 3377 static const mdb_modinfo_t modinfo = { 3378 MDB_API_VERSION, dcmds, walkers 3379 }; 3380 3381 const mdb_modinfo_t * 3382 _mdb_init(void) 3383 { 3384 return (&modinfo); 3385 } 3386