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 /* 23 * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 24 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 25 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 26 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 27 */ 28 29 #include <ctype.h> 30 #include <errno.h> 31 #include <devid.h> 32 #include <fcntl.h> 33 #include <libintl.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <strings.h> 37 #include <unistd.h> 38 #include <libgen.h> 39 #include <sys/efi_partition.h> 40 #include <sys/vtoc.h> 41 #include <sys/zfs_ioctl.h> 42 #include <dlfcn.h> 43 44 #include "zfs_namecheck.h" 45 #include "zfs_prop.h" 46 #include "libzfs_impl.h" 47 #include "zfs_comutil.h" 48 #include "zfeature_common.h" 49 50 static int read_efi_label(nvlist_t *config, diskaddr_t *sb); 51 52 #define DISK_ROOT "/dev/dsk" 53 #define RDISK_ROOT "/dev/rdsk" 54 #define BACKUP_SLICE "s2" 55 56 typedef struct prop_flags { 57 int create:1; /* Validate property on creation */ 58 int import:1; /* Validate property on import */ 59 } prop_flags_t; 60 61 /* 62 * ==================================================================== 63 * zpool property functions 64 * ==================================================================== 65 */ 66 67 static int 68 zpool_get_all_props(zpool_handle_t *zhp) 69 { 70 zfs_cmd_t zc = { 0 }; 71 libzfs_handle_t *hdl = zhp->zpool_hdl; 72 73 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 74 75 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 76 return (-1); 77 78 while (ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_GET_PROPS, &zc) != 0) { 79 if (errno == ENOMEM) { 80 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 81 zcmd_free_nvlists(&zc); 82 return (-1); 83 } 84 } else { 85 zcmd_free_nvlists(&zc); 86 return (-1); 87 } 88 } 89 90 if (zcmd_read_dst_nvlist(hdl, &zc, &zhp->zpool_props) != 0) { 91 zcmd_free_nvlists(&zc); 92 return (-1); 93 } 94 95 zcmd_free_nvlists(&zc); 96 97 return (0); 98 } 99 100 static int 101 zpool_props_refresh(zpool_handle_t *zhp) 102 { 103 nvlist_t *old_props; 104 105 old_props = zhp->zpool_props; 106 107 if (zpool_get_all_props(zhp) != 0) 108 return (-1); 109 110 nvlist_free(old_props); 111 return (0); 112 } 113 114 static char * 115 zpool_get_prop_string(zpool_handle_t *zhp, zpool_prop_t prop, 116 zprop_source_t *src) 117 { 118 nvlist_t *nv, *nvl; 119 uint64_t ival; 120 char *value; 121 zprop_source_t source; 122 123 nvl = zhp->zpool_props; 124 if (nvlist_lookup_nvlist(nvl, zpool_prop_to_name(prop), &nv) == 0) { 125 verify(nvlist_lookup_uint64(nv, ZPROP_SOURCE, &ival) == 0); 126 source = ival; 127 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0); 128 } else { 129 source = ZPROP_SRC_DEFAULT; 130 if ((value = (char *)zpool_prop_default_string(prop)) == NULL) 131 value = "-"; 132 } 133 134 if (src) 135 *src = source; 136 137 return (value); 138 } 139 140 uint64_t 141 zpool_get_prop_int(zpool_handle_t *zhp, zpool_prop_t prop, zprop_source_t *src) 142 { 143 nvlist_t *nv, *nvl; 144 uint64_t value; 145 zprop_source_t source; 146 147 if (zhp->zpool_props == NULL && zpool_get_all_props(zhp)) { 148 /* 149 * zpool_get_all_props() has most likely failed because 150 * the pool is faulted, but if all we need is the top level 151 * vdev's guid then get it from the zhp config nvlist. 152 */ 153 if ((prop == ZPOOL_PROP_GUID) && 154 (nvlist_lookup_nvlist(zhp->zpool_config, 155 ZPOOL_CONFIG_VDEV_TREE, &nv) == 0) && 156 (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &value) 157 == 0)) { 158 return (value); 159 } 160 return (zpool_prop_default_numeric(prop)); 161 } 162 163 nvl = zhp->zpool_props; 164 if (nvlist_lookup_nvlist(nvl, zpool_prop_to_name(prop), &nv) == 0) { 165 verify(nvlist_lookup_uint64(nv, ZPROP_SOURCE, &value) == 0); 166 source = value; 167 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 168 } else { 169 source = ZPROP_SRC_DEFAULT; 170 value = zpool_prop_default_numeric(prop); 171 } 172 173 if (src) 174 *src = source; 175 176 return (value); 177 } 178 179 /* 180 * Map VDEV STATE to printed strings. 181 */ 182 char * 183 zpool_state_to_name(vdev_state_t state, vdev_aux_t aux) 184 { 185 switch (state) { 186 case VDEV_STATE_CLOSED: 187 case VDEV_STATE_OFFLINE: 188 return (gettext("OFFLINE")); 189 case VDEV_STATE_REMOVED: 190 return (gettext("REMOVED")); 191 case VDEV_STATE_CANT_OPEN: 192 if (aux == VDEV_AUX_CORRUPT_DATA || aux == VDEV_AUX_BAD_LOG) 193 return (gettext("FAULTED")); 194 else if (aux == VDEV_AUX_SPLIT_POOL) 195 return (gettext("SPLIT")); 196 else 197 return (gettext("UNAVAIL")); 198 case VDEV_STATE_FAULTED: 199 return (gettext("FAULTED")); 200 case VDEV_STATE_DEGRADED: 201 return (gettext("DEGRADED")); 202 case VDEV_STATE_HEALTHY: 203 return (gettext("ONLINE")); 204 } 205 206 return (gettext("UNKNOWN")); 207 } 208 209 /* 210 * Get a zpool property value for 'prop' and return the value in 211 * a pre-allocated buffer. 212 */ 213 int 214 zpool_get_prop(zpool_handle_t *zhp, zpool_prop_t prop, char *buf, size_t len, 215 zprop_source_t *srctype, boolean_t literal) 216 { 217 uint64_t intval; 218 const char *strval; 219 zprop_source_t src = ZPROP_SRC_NONE; 220 nvlist_t *nvroot; 221 vdev_stat_t *vs; 222 uint_t vsc; 223 224 if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL) { 225 switch (prop) { 226 case ZPOOL_PROP_NAME: 227 (void) strlcpy(buf, zpool_get_name(zhp), len); 228 break; 229 230 case ZPOOL_PROP_HEALTH: 231 (void) strlcpy(buf, "FAULTED", len); 232 break; 233 234 case ZPOOL_PROP_GUID: 235 intval = zpool_get_prop_int(zhp, prop, &src); 236 (void) snprintf(buf, len, "%llu", intval); 237 break; 238 239 case ZPOOL_PROP_ALTROOT: 240 case ZPOOL_PROP_CACHEFILE: 241 case ZPOOL_PROP_COMMENT: 242 if (zhp->zpool_props != NULL || 243 zpool_get_all_props(zhp) == 0) { 244 (void) strlcpy(buf, 245 zpool_get_prop_string(zhp, prop, &src), 246 len); 247 break; 248 } 249 /* FALLTHROUGH */ 250 default: 251 (void) strlcpy(buf, "-", len); 252 break; 253 } 254 255 if (srctype != NULL) 256 *srctype = src; 257 return (0); 258 } 259 260 if (zhp->zpool_props == NULL && zpool_get_all_props(zhp) && 261 prop != ZPOOL_PROP_NAME) 262 return (-1); 263 264 switch (zpool_prop_get_type(prop)) { 265 case PROP_TYPE_STRING: 266 (void) strlcpy(buf, zpool_get_prop_string(zhp, prop, &src), 267 len); 268 break; 269 270 case PROP_TYPE_NUMBER: 271 intval = zpool_get_prop_int(zhp, prop, &src); 272 273 switch (prop) { 274 case ZPOOL_PROP_SIZE: 275 case ZPOOL_PROP_ALLOCATED: 276 case ZPOOL_PROP_FREE: 277 case ZPOOL_PROP_FREEING: 278 case ZPOOL_PROP_LEAKED: 279 if (literal) { 280 (void) snprintf(buf, len, "%llu", 281 (u_longlong_t)intval); 282 } else { 283 (void) zfs_nicenum(intval, buf, len); 284 } 285 break; 286 case ZPOOL_PROP_EXPANDSZ: 287 if (intval == 0) { 288 (void) strlcpy(buf, "-", len); 289 } else if (literal) { 290 (void) snprintf(buf, len, "%llu", 291 (u_longlong_t)intval); 292 } else { 293 (void) zfs_nicenum(intval, buf, len); 294 } 295 break; 296 case ZPOOL_PROP_CAPACITY: 297 if (literal) { 298 (void) snprintf(buf, len, "%llu", 299 (u_longlong_t)intval); 300 } else { 301 (void) snprintf(buf, len, "%llu%%", 302 (u_longlong_t)intval); 303 } 304 break; 305 case ZPOOL_PROP_FRAGMENTATION: 306 if (intval == UINT64_MAX) { 307 (void) strlcpy(buf, "-", len); 308 } else { 309 (void) snprintf(buf, len, "%llu%%", 310 (u_longlong_t)intval); 311 } 312 break; 313 case ZPOOL_PROP_DEDUPRATIO: 314 (void) snprintf(buf, len, "%llu.%02llux", 315 (u_longlong_t)(intval / 100), 316 (u_longlong_t)(intval % 100)); 317 break; 318 case ZPOOL_PROP_HEALTH: 319 verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL), 320 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 321 verify(nvlist_lookup_uint64_array(nvroot, 322 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 323 == 0); 324 325 (void) strlcpy(buf, zpool_state_to_name(intval, 326 vs->vs_aux), len); 327 break; 328 case ZPOOL_PROP_VERSION: 329 if (intval >= SPA_VERSION_FEATURES) { 330 (void) snprintf(buf, len, "-"); 331 break; 332 } 333 /* FALLTHROUGH */ 334 default: 335 (void) snprintf(buf, len, "%llu", intval); 336 } 337 break; 338 339 case PROP_TYPE_INDEX: 340 intval = zpool_get_prop_int(zhp, prop, &src); 341 if (zpool_prop_index_to_string(prop, intval, &strval) 342 != 0) 343 return (-1); 344 (void) strlcpy(buf, strval, len); 345 break; 346 347 default: 348 abort(); 349 } 350 351 if (srctype) 352 *srctype = src; 353 354 return (0); 355 } 356 357 /* 358 * Check if the bootfs name has the same pool name as it is set to. 359 * Assuming bootfs is a valid dataset name. 360 */ 361 static boolean_t 362 bootfs_name_valid(const char *pool, char *bootfs) 363 { 364 int len = strlen(pool); 365 366 if (!zfs_name_valid(bootfs, ZFS_TYPE_FILESYSTEM|ZFS_TYPE_SNAPSHOT)) 367 return (B_FALSE); 368 369 if (strncmp(pool, bootfs, len) == 0 && 370 (bootfs[len] == '/' || bootfs[len] == '\0')) 371 return (B_TRUE); 372 373 return (B_FALSE); 374 } 375 376 boolean_t 377 zpool_is_bootable(zpool_handle_t *zhp) 378 { 379 char bootfs[ZFS_MAX_DATASET_NAME_LEN]; 380 381 return (zpool_get_prop(zhp, ZPOOL_PROP_BOOTFS, bootfs, 382 sizeof (bootfs), NULL, B_FALSE) == 0 && strncmp(bootfs, "-", 383 sizeof (bootfs)) != 0); 384 } 385 386 387 /* 388 * Given an nvlist of zpool properties to be set, validate that they are 389 * correct, and parse any numeric properties (index, boolean, etc) if they are 390 * specified as strings. 391 */ 392 static nvlist_t * 393 zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname, 394 nvlist_t *props, uint64_t version, prop_flags_t flags, char *errbuf) 395 { 396 nvpair_t *elem; 397 nvlist_t *retprops; 398 zpool_prop_t prop; 399 char *strval; 400 uint64_t intval; 401 char *slash, *check; 402 struct stat64 statbuf; 403 zpool_handle_t *zhp; 404 405 if (nvlist_alloc(&retprops, NV_UNIQUE_NAME, 0) != 0) { 406 (void) no_memory(hdl); 407 return (NULL); 408 } 409 410 elem = NULL; 411 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 412 const char *propname = nvpair_name(elem); 413 414 prop = zpool_name_to_prop(propname); 415 if (prop == ZPROP_INVAL && zpool_prop_feature(propname)) { 416 int err; 417 char *fname = strchr(propname, '@') + 1; 418 419 err = zfeature_lookup_name(fname, NULL); 420 if (err != 0) { 421 ASSERT3U(err, ==, ENOENT); 422 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 423 "invalid feature '%s'"), fname); 424 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 425 goto error; 426 } 427 428 if (nvpair_type(elem) != DATA_TYPE_STRING) { 429 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 430 "'%s' must be a string"), propname); 431 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 432 goto error; 433 } 434 435 (void) nvpair_value_string(elem, &strval); 436 if (strcmp(strval, ZFS_FEATURE_ENABLED) != 0) { 437 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 438 "property '%s' can only be set to " 439 "'enabled'"), propname); 440 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 441 goto error; 442 } 443 444 if (nvlist_add_uint64(retprops, propname, 0) != 0) { 445 (void) no_memory(hdl); 446 goto error; 447 } 448 continue; 449 } 450 451 /* 452 * Make sure this property is valid and applies to this type. 453 */ 454 if (prop == ZPROP_INVAL) { 455 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 456 "invalid property '%s'"), propname); 457 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 458 goto error; 459 } 460 461 if (zpool_prop_readonly(prop)) { 462 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "'%s' " 463 "is readonly"), propname); 464 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 465 goto error; 466 } 467 468 if (zprop_parse_value(hdl, elem, prop, ZFS_TYPE_POOL, retprops, 469 &strval, &intval, errbuf) != 0) 470 goto error; 471 472 /* 473 * Perform additional checking for specific properties. 474 */ 475 switch (prop) { 476 case ZPOOL_PROP_VERSION: 477 if (intval < version || 478 !SPA_VERSION_IS_SUPPORTED(intval)) { 479 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 480 "property '%s' number %d is invalid."), 481 propname, intval); 482 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 483 goto error; 484 } 485 break; 486 487 case ZPOOL_PROP_BOOTFS: 488 if (flags.create || flags.import) { 489 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 490 "property '%s' cannot be set at creation " 491 "or import time"), propname); 492 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 493 goto error; 494 } 495 496 if (version < SPA_VERSION_BOOTFS) { 497 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 498 "pool must be upgraded to support " 499 "'%s' property"), propname); 500 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 501 goto error; 502 } 503 504 /* 505 * bootfs property value has to be a dataset name and 506 * the dataset has to be in the same pool as it sets to. 507 */ 508 if (strval[0] != '\0' && !bootfs_name_valid(poolname, 509 strval)) { 510 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "'%s' " 511 "is an invalid name"), strval); 512 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 513 goto error; 514 } 515 516 if ((zhp = zpool_open_canfail(hdl, poolname)) == NULL) { 517 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 518 "could not open pool '%s'"), poolname); 519 (void) zfs_error(hdl, EZFS_OPENFAILED, errbuf); 520 goto error; 521 } 522 zpool_close(zhp); 523 break; 524 525 case ZPOOL_PROP_ALTROOT: 526 if (!flags.create && !flags.import) { 527 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 528 "property '%s' can only be set during pool " 529 "creation or import"), propname); 530 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 531 goto error; 532 } 533 534 if (strval[0] != '/') { 535 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 536 "bad alternate root '%s'"), strval); 537 (void) zfs_error(hdl, EZFS_BADPATH, errbuf); 538 goto error; 539 } 540 break; 541 542 case ZPOOL_PROP_CACHEFILE: 543 if (strval[0] == '\0') 544 break; 545 546 if (strcmp(strval, "none") == 0) 547 break; 548 549 if (strval[0] != '/') { 550 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 551 "property '%s' must be empty, an " 552 "absolute path, or 'none'"), propname); 553 (void) zfs_error(hdl, EZFS_BADPATH, errbuf); 554 goto error; 555 } 556 557 slash = strrchr(strval, '/'); 558 559 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 560 strcmp(slash, "/..") == 0) { 561 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 562 "'%s' is not a valid file"), strval); 563 (void) zfs_error(hdl, EZFS_BADPATH, errbuf); 564 goto error; 565 } 566 567 *slash = '\0'; 568 569 if (strval[0] != '\0' && 570 (stat64(strval, &statbuf) != 0 || 571 !S_ISDIR(statbuf.st_mode))) { 572 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 573 "'%s' is not a valid directory"), 574 strval); 575 (void) zfs_error(hdl, EZFS_BADPATH, errbuf); 576 goto error; 577 } 578 579 *slash = '/'; 580 break; 581 582 case ZPOOL_PROP_COMMENT: 583 for (check = strval; *check != '\0'; check++) { 584 if (!isprint(*check)) { 585 zfs_error_aux(hdl, 586 dgettext(TEXT_DOMAIN, 587 "comment may only have printable " 588 "characters")); 589 (void) zfs_error(hdl, EZFS_BADPROP, 590 errbuf); 591 goto error; 592 } 593 } 594 if (strlen(strval) > ZPROP_MAX_COMMENT) { 595 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 596 "comment must not exceed %d characters"), 597 ZPROP_MAX_COMMENT); 598 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 599 goto error; 600 } 601 break; 602 case ZPOOL_PROP_READONLY: 603 if (!flags.import) { 604 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 605 "property '%s' can only be set at " 606 "import time"), propname); 607 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 608 goto error; 609 } 610 break; 611 } 612 } 613 614 return (retprops); 615 error: 616 nvlist_free(retprops); 617 return (NULL); 618 } 619 620 /* 621 * Set zpool property : propname=propval. 622 */ 623 int 624 zpool_set_prop(zpool_handle_t *zhp, const char *propname, const char *propval) 625 { 626 zfs_cmd_t zc = { 0 }; 627 int ret = -1; 628 char errbuf[1024]; 629 nvlist_t *nvl = NULL; 630 nvlist_t *realprops; 631 uint64_t version; 632 prop_flags_t flags = { 0 }; 633 634 (void) snprintf(errbuf, sizeof (errbuf), 635 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 636 zhp->zpool_name); 637 638 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 639 return (no_memory(zhp->zpool_hdl)); 640 641 if (nvlist_add_string(nvl, propname, propval) != 0) { 642 nvlist_free(nvl); 643 return (no_memory(zhp->zpool_hdl)); 644 } 645 646 version = zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL); 647 if ((realprops = zpool_valid_proplist(zhp->zpool_hdl, 648 zhp->zpool_name, nvl, version, flags, errbuf)) == NULL) { 649 nvlist_free(nvl); 650 return (-1); 651 } 652 653 nvlist_free(nvl); 654 nvl = realprops; 655 656 /* 657 * Execute the corresponding ioctl() to set this property. 658 */ 659 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 660 661 if (zcmd_write_src_nvlist(zhp->zpool_hdl, &zc, nvl) != 0) { 662 nvlist_free(nvl); 663 return (-1); 664 } 665 666 ret = zfs_ioctl(zhp->zpool_hdl, ZFS_IOC_POOL_SET_PROPS, &zc); 667 668 zcmd_free_nvlists(&zc); 669 nvlist_free(nvl); 670 671 if (ret) 672 (void) zpool_standard_error(zhp->zpool_hdl, errno, errbuf); 673 else 674 (void) zpool_props_refresh(zhp); 675 676 return (ret); 677 } 678 679 int 680 zpool_expand_proplist(zpool_handle_t *zhp, zprop_list_t **plp) 681 { 682 libzfs_handle_t *hdl = zhp->zpool_hdl; 683 zprop_list_t *entry; 684 char buf[ZFS_MAXPROPLEN]; 685 nvlist_t *features = NULL; 686 zprop_list_t **last; 687 boolean_t firstexpand = (NULL == *plp); 688 689 if (zprop_expand_list(hdl, plp, ZFS_TYPE_POOL) != 0) 690 return (-1); 691 692 last = plp; 693 while (*last != NULL) 694 last = &(*last)->pl_next; 695 696 if ((*plp)->pl_all) 697 features = zpool_get_features(zhp); 698 699 if ((*plp)->pl_all && firstexpand) { 700 for (int i = 0; i < SPA_FEATURES; i++) { 701 zprop_list_t *entry = zfs_alloc(hdl, 702 sizeof (zprop_list_t)); 703 entry->pl_prop = ZPROP_INVAL; 704 entry->pl_user_prop = zfs_asprintf(hdl, "feature@%s", 705 spa_feature_table[i].fi_uname); 706 entry->pl_width = strlen(entry->pl_user_prop); 707 entry->pl_all = B_TRUE; 708 709 *last = entry; 710 last = &entry->pl_next; 711 } 712 } 713 714 /* add any unsupported features */ 715 for (nvpair_t *nvp = nvlist_next_nvpair(features, NULL); 716 nvp != NULL; nvp = nvlist_next_nvpair(features, nvp)) { 717 char *propname; 718 boolean_t found; 719 zprop_list_t *entry; 720 721 if (zfeature_is_supported(nvpair_name(nvp))) 722 continue; 723 724 propname = zfs_asprintf(hdl, "unsupported@%s", 725 nvpair_name(nvp)); 726 727 /* 728 * Before adding the property to the list make sure that no 729 * other pool already added the same property. 730 */ 731 found = B_FALSE; 732 entry = *plp; 733 while (entry != NULL) { 734 if (entry->pl_user_prop != NULL && 735 strcmp(propname, entry->pl_user_prop) == 0) { 736 found = B_TRUE; 737 break; 738 } 739 entry = entry->pl_next; 740 } 741 if (found) { 742 free(propname); 743 continue; 744 } 745 746 entry = zfs_alloc(hdl, sizeof (zprop_list_t)); 747 entry->pl_prop = ZPROP_INVAL; 748 entry->pl_user_prop = propname; 749 entry->pl_width = strlen(entry->pl_user_prop); 750 entry->pl_all = B_TRUE; 751 752 *last = entry; 753 last = &entry->pl_next; 754 } 755 756 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 757 758 if (entry->pl_fixed) 759 continue; 760 761 if (entry->pl_prop != ZPROP_INVAL && 762 zpool_get_prop(zhp, entry->pl_prop, buf, sizeof (buf), 763 NULL, B_FALSE) == 0) { 764 if (strlen(buf) > entry->pl_width) 765 entry->pl_width = strlen(buf); 766 } 767 } 768 769 return (0); 770 } 771 772 /* 773 * Get the state for the given feature on the given ZFS pool. 774 */ 775 int 776 zpool_prop_get_feature(zpool_handle_t *zhp, const char *propname, char *buf, 777 size_t len) 778 { 779 uint64_t refcount; 780 boolean_t found = B_FALSE; 781 nvlist_t *features = zpool_get_features(zhp); 782 boolean_t supported; 783 const char *feature = strchr(propname, '@') + 1; 784 785 supported = zpool_prop_feature(propname); 786 ASSERT(supported || zfs_prop_unsupported(propname)); 787 788 /* 789 * Convert from feature name to feature guid. This conversion is 790 * unecessary for unsupported@... properties because they already 791 * use guids. 792 */ 793 if (supported) { 794 int ret; 795 spa_feature_t fid; 796 797 ret = zfeature_lookup_name(feature, &fid); 798 if (ret != 0) { 799 (void) strlcpy(buf, "-", len); 800 return (ENOTSUP); 801 } 802 feature = spa_feature_table[fid].fi_guid; 803 } 804 805 if (nvlist_lookup_uint64(features, feature, &refcount) == 0) 806 found = B_TRUE; 807 808 if (supported) { 809 if (!found) { 810 (void) strlcpy(buf, ZFS_FEATURE_DISABLED, len); 811 } else { 812 if (refcount == 0) 813 (void) strlcpy(buf, ZFS_FEATURE_ENABLED, len); 814 else 815 (void) strlcpy(buf, ZFS_FEATURE_ACTIVE, len); 816 } 817 } else { 818 if (found) { 819 if (refcount == 0) { 820 (void) strcpy(buf, ZFS_UNSUPPORTED_INACTIVE); 821 } else { 822 (void) strcpy(buf, ZFS_UNSUPPORTED_READONLY); 823 } 824 } else { 825 (void) strlcpy(buf, "-", len); 826 return (ENOTSUP); 827 } 828 } 829 830 return (0); 831 } 832 833 /* 834 * Don't start the slice at the default block of 34; many storage 835 * devices will use a stripe width of 128k, so start there instead. 836 */ 837 #define NEW_START_BLOCK 256 838 839 /* 840 * Validate the given pool name, optionally putting an extended error message in 841 * 'buf'. 842 */ 843 boolean_t 844 zpool_name_valid(libzfs_handle_t *hdl, boolean_t isopen, const char *pool) 845 { 846 namecheck_err_t why; 847 char what; 848 int ret; 849 850 ret = pool_namecheck(pool, &why, &what); 851 852 /* 853 * The rules for reserved pool names were extended at a later point. 854 * But we need to support users with existing pools that may now be 855 * invalid. So we only check for this expanded set of names during a 856 * create (or import), and only in userland. 857 */ 858 if (ret == 0 && !isopen && 859 (strncmp(pool, "mirror", 6) == 0 || 860 strncmp(pool, "raidz", 5) == 0 || 861 strncmp(pool, "spare", 5) == 0 || 862 strcmp(pool, "log") == 0)) { 863 if (hdl != NULL) 864 zfs_error_aux(hdl, 865 dgettext(TEXT_DOMAIN, "name is reserved")); 866 return (B_FALSE); 867 } 868 869 870 if (ret != 0) { 871 if (hdl != NULL) { 872 switch (why) { 873 case NAME_ERR_TOOLONG: 874 zfs_error_aux(hdl, 875 dgettext(TEXT_DOMAIN, "name is too long")); 876 break; 877 878 case NAME_ERR_INVALCHAR: 879 zfs_error_aux(hdl, 880 dgettext(TEXT_DOMAIN, "invalid character " 881 "'%c' in pool name"), what); 882 break; 883 884 case NAME_ERR_NOLETTER: 885 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 886 "name must begin with a letter")); 887 break; 888 889 case NAME_ERR_RESERVED: 890 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 891 "name is reserved")); 892 break; 893 894 case NAME_ERR_DISKLIKE: 895 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 896 "pool name is reserved")); 897 break; 898 899 case NAME_ERR_LEADING_SLASH: 900 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 901 "leading slash in name")); 902 break; 903 904 case NAME_ERR_EMPTY_COMPONENT: 905 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 906 "empty component in name")); 907 break; 908 909 case NAME_ERR_TRAILING_SLASH: 910 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 911 "trailing slash in name")); 912 break; 913 914 case NAME_ERR_MULTIPLE_DELIMITERS: 915 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 916 "multiple '@' and/or '#' delimiters in " 917 "name")); 918 break; 919 920 } 921 } 922 return (B_FALSE); 923 } 924 925 return (B_TRUE); 926 } 927 928 /* 929 * Open a handle to the given pool, even if the pool is currently in the FAULTED 930 * state. 931 */ 932 zpool_handle_t * 933 zpool_open_canfail(libzfs_handle_t *hdl, const char *pool) 934 { 935 zpool_handle_t *zhp; 936 boolean_t missing; 937 938 /* 939 * Make sure the pool name is valid. 940 */ 941 if (!zpool_name_valid(hdl, B_TRUE, pool)) { 942 (void) zfs_error_fmt(hdl, EZFS_INVALIDNAME, 943 dgettext(TEXT_DOMAIN, "cannot open '%s'"), 944 pool); 945 return (NULL); 946 } 947 948 if ((zhp = zfs_alloc(hdl, sizeof (zpool_handle_t))) == NULL) 949 return (NULL); 950 951 zhp->zpool_hdl = hdl; 952 (void) strlcpy(zhp->zpool_name, pool, sizeof (zhp->zpool_name)); 953 954 if (zpool_refresh_stats(zhp, &missing) != 0) { 955 zpool_close(zhp); 956 return (NULL); 957 } 958 959 if (missing) { 960 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "no such pool")); 961 (void) zfs_error_fmt(hdl, EZFS_NOENT, 962 dgettext(TEXT_DOMAIN, "cannot open '%s'"), pool); 963 zpool_close(zhp); 964 return (NULL); 965 } 966 967 return (zhp); 968 } 969 970 /* 971 * Like the above, but silent on error. Used when iterating over pools (because 972 * the configuration cache may be out of date). 973 */ 974 int 975 zpool_open_silent(libzfs_handle_t *hdl, const char *pool, zpool_handle_t **ret) 976 { 977 zpool_handle_t *zhp; 978 boolean_t missing; 979 980 if ((zhp = zfs_alloc(hdl, sizeof (zpool_handle_t))) == NULL) 981 return (-1); 982 983 zhp->zpool_hdl = hdl; 984 (void) strlcpy(zhp->zpool_name, pool, sizeof (zhp->zpool_name)); 985 986 if (zpool_refresh_stats(zhp, &missing) != 0) { 987 zpool_close(zhp); 988 return (-1); 989 } 990 991 if (missing) { 992 zpool_close(zhp); 993 *ret = NULL; 994 return (0); 995 } 996 997 *ret = zhp; 998 return (0); 999 } 1000 1001 /* 1002 * Similar to zpool_open_canfail(), but refuses to open pools in the faulted 1003 * state. 1004 */ 1005 zpool_handle_t * 1006 zpool_open(libzfs_handle_t *hdl, const char *pool) 1007 { 1008 zpool_handle_t *zhp; 1009 1010 if ((zhp = zpool_open_canfail(hdl, pool)) == NULL) 1011 return (NULL); 1012 1013 if (zhp->zpool_state == POOL_STATE_UNAVAIL) { 1014 (void) zfs_error_fmt(hdl, EZFS_POOLUNAVAIL, 1015 dgettext(TEXT_DOMAIN, "cannot open '%s'"), zhp->zpool_name); 1016 zpool_close(zhp); 1017 return (NULL); 1018 } 1019 1020 return (zhp); 1021 } 1022 1023 /* 1024 * Close the handle. Simply frees the memory associated with the handle. 1025 */ 1026 void 1027 zpool_close(zpool_handle_t *zhp) 1028 { 1029 nvlist_free(zhp->zpool_config); 1030 nvlist_free(zhp->zpool_old_config); 1031 nvlist_free(zhp->zpool_props); 1032 free(zhp); 1033 } 1034 1035 /* 1036 * Return the name of the pool. 1037 */ 1038 const char * 1039 zpool_get_name(zpool_handle_t *zhp) 1040 { 1041 return (zhp->zpool_name); 1042 } 1043 1044 1045 /* 1046 * Return the state of the pool (ACTIVE or UNAVAILABLE) 1047 */ 1048 int 1049 zpool_get_state(zpool_handle_t *zhp) 1050 { 1051 return (zhp->zpool_state); 1052 } 1053 1054 /* 1055 * Create the named pool, using the provided vdev list. It is assumed 1056 * that the consumer has already validated the contents of the nvlist, so we 1057 * don't have to worry about error semantics. 1058 */ 1059 int 1060 zpool_create(libzfs_handle_t *hdl, const char *pool, nvlist_t *nvroot, 1061 nvlist_t *props, nvlist_t *fsprops) 1062 { 1063 zfs_cmd_t zc = { 0 }; 1064 nvlist_t *zc_fsprops = NULL; 1065 nvlist_t *zc_props = NULL; 1066 char msg[1024]; 1067 int ret = -1; 1068 1069 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN, 1070 "cannot create '%s'"), pool); 1071 1072 if (!zpool_name_valid(hdl, B_FALSE, pool)) 1073 return (zfs_error(hdl, EZFS_INVALIDNAME, msg)); 1074 1075 if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0) 1076 return (-1); 1077 1078 if (props) { 1079 prop_flags_t flags = { .create = B_TRUE, .import = B_FALSE }; 1080 1081 if ((zc_props = zpool_valid_proplist(hdl, pool, props, 1082 SPA_VERSION_1, flags, msg)) == NULL) { 1083 goto create_failed; 1084 } 1085 } 1086 1087 if (fsprops) { 1088 uint64_t zoned; 1089 char *zonestr; 1090 1091 zoned = ((nvlist_lookup_string(fsprops, 1092 zfs_prop_to_name(ZFS_PROP_ZONED), &zonestr) == 0) && 1093 strcmp(zonestr, "on") == 0); 1094 1095 if ((zc_fsprops = zfs_valid_proplist(hdl, ZFS_TYPE_FILESYSTEM, 1096 fsprops, zoned, NULL, NULL, msg)) == NULL) { 1097 goto create_failed; 1098 } 1099 if (!zc_props && 1100 (nvlist_alloc(&zc_props, NV_UNIQUE_NAME, 0) != 0)) { 1101 goto create_failed; 1102 } 1103 if (nvlist_add_nvlist(zc_props, 1104 ZPOOL_ROOTFS_PROPS, zc_fsprops) != 0) { 1105 goto create_failed; 1106 } 1107 } 1108 1109 if (zc_props && zcmd_write_src_nvlist(hdl, &zc, zc_props) != 0) 1110 goto create_failed; 1111 1112 (void) strlcpy(zc.zc_name, pool, sizeof (zc.zc_name)); 1113 1114 if ((ret = zfs_ioctl(hdl, ZFS_IOC_POOL_CREATE, &zc)) != 0) { 1115 1116 zcmd_free_nvlists(&zc); 1117 nvlist_free(zc_props); 1118 nvlist_free(zc_fsprops); 1119 1120 switch (errno) { 1121 case EBUSY: 1122 /* 1123 * This can happen if the user has specified the same 1124 * device multiple times. We can't reliably detect this 1125 * until we try to add it and see we already have a 1126 * label. 1127 */ 1128 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1129 "one or more vdevs refer to the same device")); 1130 return (zfs_error(hdl, EZFS_BADDEV, msg)); 1131 1132 case ERANGE: 1133 /* 1134 * This happens if the record size is smaller or larger 1135 * than the allowed size range, or not a power of 2. 1136 * 1137 * NOTE: although zfs_valid_proplist is called earlier, 1138 * this case may have slipped through since the 1139 * pool does not exist yet and it is therefore 1140 * impossible to read properties e.g. max blocksize 1141 * from the pool. 1142 */ 1143 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1144 "record size invalid")); 1145 return (zfs_error(hdl, EZFS_BADPROP, msg)); 1146 1147 case EOVERFLOW: 1148 /* 1149 * This occurs when one of the devices is below 1150 * SPA_MINDEVSIZE. Unfortunately, we can't detect which 1151 * device was the problem device since there's no 1152 * reliable way to determine device size from userland. 1153 */ 1154 { 1155 char buf[64]; 1156 1157 zfs_nicenum(SPA_MINDEVSIZE, buf, sizeof (buf)); 1158 1159 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1160 "one or more devices is less than the " 1161 "minimum size (%s)"), buf); 1162 } 1163 return (zfs_error(hdl, EZFS_BADDEV, msg)); 1164 1165 case ENOSPC: 1166 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1167 "one or more devices is out of space")); 1168 return (zfs_error(hdl, EZFS_BADDEV, msg)); 1169 1170 case ENOTBLK: 1171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1172 "cache device must be a disk or disk slice")); 1173 return (zfs_error(hdl, EZFS_BADDEV, msg)); 1174 1175 default: 1176 return (zpool_standard_error(hdl, errno, msg)); 1177 } 1178 } 1179 1180 create_failed: 1181 zcmd_free_nvlists(&zc); 1182 nvlist_free(zc_props); 1183 nvlist_free(zc_fsprops); 1184 return (ret); 1185 } 1186 1187 /* 1188 * Destroy the given pool. It is up to the caller to ensure that there are no 1189 * datasets left in the pool. 1190 */ 1191 int 1192 zpool_destroy(zpool_handle_t *zhp, const char *log_str) 1193 { 1194 zfs_cmd_t zc = { 0 }; 1195 zfs_handle_t *zfp = NULL; 1196 libzfs_handle_t *hdl = zhp->zpool_hdl; 1197 char msg[1024]; 1198 1199 if (zhp->zpool_state == POOL_STATE_ACTIVE && 1200 (zfp = zfs_open(hdl, zhp->zpool_name, ZFS_TYPE_FILESYSTEM)) == NULL) 1201 return (-1); 1202 1203 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 1204 zc.zc_history = (uint64_t)(uintptr_t)log_str; 1205 1206 if (zfs_ioctl(hdl, ZFS_IOC_POOL_DESTROY, &zc) != 0) { 1207 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN, 1208 "cannot destroy '%s'"), zhp->zpool_name); 1209 1210 if (errno == EROFS) { 1211 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1212 "one or more devices is read only")); 1213 (void) zfs_error(hdl, EZFS_BADDEV, msg); 1214 } else { 1215 (void) zpool_standard_error(hdl, errno, msg); 1216 } 1217 1218 if (zfp) 1219 zfs_close(zfp); 1220 return (-1); 1221 } 1222 1223 if (zfp) { 1224 remove_mountpoint(zfp); 1225 zfs_close(zfp); 1226 } 1227 1228 return (0); 1229 } 1230 1231 /* 1232 * Add the given vdevs to the pool. The caller must have already performed the 1233 * necessary verification to ensure that the vdev specification is well-formed. 1234 */ 1235 int 1236 zpool_add(zpool_handle_t *zhp, nvlist_t *nvroot) 1237 { 1238 zfs_cmd_t zc = { 0 }; 1239 int ret; 1240 libzfs_handle_t *hdl = zhp->zpool_hdl; 1241 char msg[1024]; 1242 nvlist_t **spares, **l2cache; 1243 uint_t nspares, nl2cache; 1244 1245 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN, 1246 "cannot add to '%s'"), zhp->zpool_name); 1247 1248 if (zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL) < 1249 SPA_VERSION_SPARES && 1250 nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 1251 &spares, &nspares) == 0) { 1252 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool must be " 1253 "upgraded to add hot spares")); 1254 return (zfs_error(hdl, EZFS_BADVERSION, msg)); 1255 } 1256 1257 if (zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL) < 1258 SPA_VERSION_L2CACHE && 1259 nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 1260 &l2cache, &nl2cache) == 0) { 1261 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "pool must be " 1262 "upgraded to add cache devices")); 1263 return (zfs_error(hdl, EZFS_BADVERSION, msg)); 1264 } 1265 1266 if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0) 1267 return (-1); 1268 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 1269 1270 if (zfs_ioctl(hdl, ZFS_IOC_VDEV_ADD, &zc) != 0) { 1271 switch (errno) { 1272 case EBUSY: 1273 /* 1274 * This can happen if the user has specified the same 1275 * device multiple times. We can't reliably detect this 1276 * until we try to add it and see we already have a 1277 * label. 1278 */ 1279 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1280 "one or more vdevs refer to the same device")); 1281 (void) zfs_error(hdl, EZFS_BADDEV, msg); 1282 break; 1283 1284 case EOVERFLOW: 1285 /* 1286 * This occurrs when one of the devices is below 1287 * SPA_MINDEVSIZE. Unfortunately, we can't detect which 1288 * device was the problem device since there's no 1289 * reliable way to determine device size from userland. 1290 */ 1291 { 1292 char buf[64]; 1293 1294 zfs_nicenum(SPA_MINDEVSIZE, buf, sizeof (buf)); 1295 1296 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1297 "device is less than the minimum " 1298 "size (%s)"), buf); 1299 } 1300 (void) zfs_error(hdl, EZFS_BADDEV, msg); 1301 break; 1302 1303 case ENOTSUP: 1304 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1305 "pool must be upgraded to add these vdevs")); 1306 (void) zfs_error(hdl, EZFS_BADVERSION, msg); 1307 break; 1308 1309 case EDOM: 1310 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1311 "root pool can not have multiple vdevs" 1312 " or separate logs")); 1313 (void) zfs_error(hdl, EZFS_POOL_NOTSUP, msg); 1314 break; 1315 1316 case ENOTBLK: 1317 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1318 "cache device must be a disk or disk slice")); 1319 (void) zfs_error(hdl, EZFS_BADDEV, msg); 1320 break; 1321 1322 default: 1323 (void) zpool_standard_error(hdl, errno, msg); 1324 } 1325 1326 ret = -1; 1327 } else { 1328 ret = 0; 1329 } 1330 1331 zcmd_free_nvlists(&zc); 1332 1333 return (ret); 1334 } 1335 1336 /* 1337 * Exports the pool from the system. The caller must ensure that there are no 1338 * mounted datasets in the pool. 1339 */ 1340 static int 1341 zpool_export_common(zpool_handle_t *zhp, boolean_t force, boolean_t hardforce, 1342 const char *log_str) 1343 { 1344 zfs_cmd_t zc = { 0 }; 1345 char msg[1024]; 1346 1347 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN, 1348 "cannot export '%s'"), zhp->zpool_name); 1349 1350 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 1351 zc.zc_cookie = force; 1352 zc.zc_guid = hardforce; 1353 zc.zc_history = (uint64_t)(uintptr_t)log_str; 1354 1355 if (zfs_ioctl(zhp->zpool_hdl, ZFS_IOC_POOL_EXPORT, &zc) != 0) { 1356 switch (errno) { 1357 case EXDEV: 1358 zfs_error_aux(zhp->zpool_hdl, dgettext(TEXT_DOMAIN, 1359 "use '-f' to override the following errors:\n" 1360 "'%s' has an active shared spare which could be" 1361 " used by other pools once '%s' is exported."), 1362 zhp->zpool_name, zhp->zpool_name); 1363 return (zfs_error(zhp->zpool_hdl, EZFS_ACTIVE_SPARE, 1364 msg)); 1365 default: 1366 return (zpool_standard_error_fmt(zhp->zpool_hdl, errno, 1367 msg)); 1368 } 1369 } 1370 1371 return (0); 1372 } 1373 1374 int 1375 zpool_export(zpool_handle_t *zhp, boolean_t force, const char *log_str) 1376 { 1377 return (zpool_export_common(zhp, force, B_FALSE, log_str)); 1378 } 1379 1380 int 1381 zpool_export_force(zpool_handle_t *zhp, const char *log_str) 1382 { 1383 return (zpool_export_common(zhp, B_TRUE, B_TRUE, log_str)); 1384 } 1385 1386 static void 1387 zpool_rewind_exclaim(libzfs_handle_t *hdl, const char *name, boolean_t dryrun, 1388 nvlist_t *config) 1389 { 1390 nvlist_t *nv = NULL; 1391 uint64_t rewindto; 1392 int64_t loss = -1; 1393 struct tm t; 1394 char timestr[128]; 1395 1396 if (!hdl->libzfs_printerr || config == NULL) 1397 return; 1398 1399 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, &nv) != 0 || 1400 nvlist_lookup_nvlist(nv, ZPOOL_CONFIG_REWIND_INFO, &nv) != 0) { 1401 return; 1402 } 1403 1404 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_TIME, &rewindto) != 0) 1405 return; 1406 (void) nvlist_lookup_int64(nv, ZPOOL_CONFIG_REWIND_TIME, &loss); 1407 1408 if (localtime_r((time_t *)&rewindto, &t) != NULL && 1409 strftime(timestr, 128, 0, &t) != 0) { 1410 if (dryrun) { 1411 (void) printf(dgettext(TEXT_DOMAIN, 1412 "Would be able to return %s " 1413 "to its state as of %s.\n"), 1414 name, timestr); 1415 } else { 1416 (void) printf(dgettext(TEXT_DOMAIN, 1417 "Pool %s returned to its state as of %s.\n"), 1418 name, timestr); 1419 } 1420 if (loss > 120) { 1421 (void) printf(dgettext(TEXT_DOMAIN, 1422 "%s approximately %lld "), 1423 dryrun ? "Would discard" : "Discarded", 1424 (loss + 30) / 60); 1425 (void) printf(dgettext(TEXT_DOMAIN, 1426 "minutes of transactions.\n")); 1427 } else if (loss > 0) { 1428 (void) printf(dgettext(TEXT_DOMAIN, 1429 "%s approximately %lld "), 1430 dryrun ? "Would discard" : "Discarded", loss); 1431 (void) printf(dgettext(TEXT_DOMAIN, 1432 "seconds of transactions.\n")); 1433 } 1434 } 1435 } 1436 1437 void 1438 zpool_explain_recover(libzfs_handle_t *hdl, const char *name, int reason, 1439 nvlist_t *config) 1440 { 1441 nvlist_t *nv = NULL; 1442 int64_t loss = -1; 1443 uint64_t edata = UINT64_MAX; 1444 uint64_t rewindto; 1445 struct tm t; 1446 char timestr[128]; 1447 1448 if (!hdl->libzfs_printerr) 1449 return; 1450 1451 if (reason >= 0) 1452 (void) printf(dgettext(TEXT_DOMAIN, "action: ")); 1453 else 1454 (void) printf(dgettext(TEXT_DOMAIN, "\t")); 1455 1456 /* All attempted rewinds failed if ZPOOL_CONFIG_LOAD_TIME missing */ 1457 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, &nv) != 0 || 1458 nvlist_lookup_nvlist(nv, ZPOOL_CONFIG_REWIND_INFO, &nv) != 0 || 1459 nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_TIME, &rewindto) != 0) 1460 goto no_info; 1461 1462 (void) nvlist_lookup_int64(nv, ZPOOL_CONFIG_REWIND_TIME, &loss); 1463 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_LOAD_DATA_ERRORS, 1464 &edata); 1465 1466 (void) printf(dgettext(TEXT_DOMAIN, 1467 "Recovery is possible, but will result in some data loss.\n")); 1468 1469 if (localtime_r((time_t *)&rewindto, &t) != NULL && 1470 strftime(timestr, 128, 0, &t) != 0) { 1471 (void) printf(dgettext(TEXT_DOMAIN, 1472 "\tReturning the pool to its state as of %s\n" 1473 "\tshould correct the problem. "), 1474 timestr); 1475 } else { 1476 (void) printf(dgettext(TEXT_DOMAIN, 1477 "\tReverting the pool to an earlier state " 1478 "should correct the problem.\n\t")); 1479 } 1480 1481 if (loss > 120) { 1482 (void) printf(dgettext(TEXT_DOMAIN, 1483 "Approximately %lld minutes of data\n" 1484 "\tmust be discarded, irreversibly. "), (loss + 30) / 60); 1485 } else if (loss > 0) { 1486 (void) printf(dgettext(TEXT_DOMAIN, 1487 "Approximately %lld seconds of data\n" 1488 "\tmust be discarded, irreversibly. "), loss); 1489 } 1490 if (edata != 0 && edata != UINT64_MAX) { 1491 if (edata == 1) { 1492 (void) printf(dgettext(TEXT_DOMAIN, 1493 "After rewind, at least\n" 1494 "\tone persistent user-data error will remain. ")); 1495 } else { 1496 (void) printf(dgettext(TEXT_DOMAIN, 1497 "After rewind, several\n" 1498 "\tpersistent user-data errors will remain. ")); 1499 } 1500 } 1501 (void) printf(dgettext(TEXT_DOMAIN, 1502 "Recovery can be attempted\n\tby executing 'zpool %s -F %s'. "), 1503 reason >= 0 ? "clear" : "import", name); 1504 1505 (void) printf(dgettext(TEXT_DOMAIN, 1506 "A scrub of the pool\n" 1507 "\tis strongly recommended after recovery.\n")); 1508 return; 1509 1510 no_info: 1511 (void) printf(dgettext(TEXT_DOMAIN, 1512 "Destroy and re-create the pool from\n\ta backup source.\n")); 1513 } 1514 1515 /* 1516 * zpool_import() is a contracted interface. Should be kept the same 1517 * if possible. 1518 * 1519 * Applications should use zpool_import_props() to import a pool with 1520 * new properties value to be set. 1521 */ 1522 int 1523 zpool_import(libzfs_handle_t *hdl, nvlist_t *config, const char *newname, 1524 char *altroot) 1525 { 1526 nvlist_t *props = NULL; 1527 int ret; 1528 1529 if (altroot != NULL) { 1530 if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) { 1531 return (zfs_error_fmt(hdl, EZFS_NOMEM, 1532 dgettext(TEXT_DOMAIN, "cannot import '%s'"), 1533 newname)); 1534 } 1535 1536 if (nvlist_add_string(props, 1537 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), altroot) != 0 || 1538 nvlist_add_string(props, 1539 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), "none") != 0) { 1540 nvlist_free(props); 1541 return (zfs_error_fmt(hdl, EZFS_NOMEM, 1542 dgettext(TEXT_DOMAIN, "cannot import '%s'"), 1543 newname)); 1544 } 1545 } 1546 1547 ret = zpool_import_props(hdl, config, newname, props, 1548 ZFS_IMPORT_NORMAL); 1549 nvlist_free(props); 1550 return (ret); 1551 } 1552 1553 static void 1554 print_vdev_tree(libzfs_handle_t *hdl, const char *name, nvlist_t *nv, 1555 int indent) 1556 { 1557 nvlist_t **child; 1558 uint_t c, children; 1559 char *vname; 1560 uint64_t is_log = 0; 1561 1562 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, 1563 &is_log); 1564 1565 if (name != NULL) 1566 (void) printf("\t%*s%s%s\n", indent, "", name, 1567 is_log ? " [log]" : ""); 1568 1569 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1570 &child, &children) != 0) 1571 return; 1572 1573 for (c = 0; c < children; c++) { 1574 vname = zpool_vdev_name(hdl, NULL, child[c], B_TRUE); 1575 print_vdev_tree(hdl, vname, child[c], indent + 2); 1576 free(vname); 1577 } 1578 } 1579 1580 void 1581 zpool_print_unsup_feat(nvlist_t *config) 1582 { 1583 nvlist_t *nvinfo, *unsup_feat; 1584 1585 verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, &nvinfo) == 1586 0); 1587 verify(nvlist_lookup_nvlist(nvinfo, ZPOOL_CONFIG_UNSUP_FEAT, 1588 &unsup_feat) == 0); 1589 1590 for (nvpair_t *nvp = nvlist_next_nvpair(unsup_feat, NULL); nvp != NULL; 1591 nvp = nvlist_next_nvpair(unsup_feat, nvp)) { 1592 char *desc; 1593 1594 verify(nvpair_type(nvp) == DATA_TYPE_STRING); 1595 verify(nvpair_value_string(nvp, &desc) == 0); 1596 1597 if (strlen(desc) > 0) 1598 (void) printf("\t%s (%s)\n", nvpair_name(nvp), desc); 1599 else 1600 (void) printf("\t%s\n", nvpair_name(nvp)); 1601 } 1602 } 1603 1604 /* 1605 * Import the given pool using the known configuration and a list of 1606 * properties to be set. The configuration should have come from 1607 * zpool_find_import(). The 'newname' parameters control whether the pool 1608 * is imported with a different name. 1609 */ 1610 int 1611 zpool_import_props(libzfs_handle_t *hdl, nvlist_t *config, const char *newname, 1612 nvlist_t *props, int flags) 1613 { 1614 zfs_cmd_t zc = { 0 }; 1615 zpool_rewind_policy_t policy; 1616 nvlist_t *nv = NULL; 1617 nvlist_t *nvinfo = NULL; 1618 nvlist_t *missing = NULL; 1619 char *thename; 1620 char *origname; 1621 int ret; 1622 int error = 0; 1623 char errbuf[1024]; 1624 1625 verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 1626 &origname) == 0); 1627 1628 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1629 "cannot import pool '%s'"), origname); 1630 1631 if (newname != NULL) { 1632 if (!zpool_name_valid(hdl, B_FALSE, newname)) 1633 return (zfs_error_fmt(hdl, EZFS_INVALIDNAME, 1634 dgettext(TEXT_DOMAIN, "cannot import '%s'"), 1635 newname)); 1636 thename = (char *)newname; 1637 } else { 1638 thename = origname; 1639 } 1640 1641 if (props != NULL) { 1642 uint64_t version; 1643 prop_flags_t flags = { .create = B_FALSE, .import = B_TRUE }; 1644 1645 verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 1646 &version) == 0); 1647 1648 if ((props = zpool_valid_proplist(hdl, origname, 1649 props, version, flags, errbuf)) == NULL) 1650 return (-1); 1651 if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) { 1652 nvlist_free(props); 1653 return (-1); 1654 } 1655 nvlist_free(props); 1656 } 1657 1658 (void) strlcpy(zc.zc_name, thename, sizeof (zc.zc_name)); 1659 1660 verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 1661 &zc.zc_guid) == 0); 1662 1663 if (zcmd_write_conf_nvlist(hdl, &zc, config) != 0) { 1664 zcmd_free_nvlists(&zc); 1665 return (-1); 1666 } 1667 if (zcmd_alloc_dst_nvlist(hdl, &zc, zc.zc_nvlist_conf_size * 2) != 0) { 1668 zcmd_free_nvlists(&zc); 1669 return (-1); 1670 } 1671 1672 zc.zc_cookie = flags; 1673 while ((ret = zfs_ioctl(hdl, ZFS_IOC_POOL_IMPORT, &zc)) != 0 && 1674 errno == ENOMEM) { 1675 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 1676 zcmd_free_nvlists(&zc); 1677 return (-1); 1678 } 1679 } 1680 if (ret != 0) 1681 error = errno; 1682 1683 (void) zcmd_read_dst_nvlist(hdl, &zc, &nv); 1684 1685 zcmd_free_nvlists(&zc); 1686 1687 zpool_get_rewind_policy(config, &policy); 1688 1689 if (error) { 1690 char desc[1024]; 1691 1692 /* 1693 * Dry-run failed, but we print out what success 1694 * looks like if we found a best txg 1695 */ 1696 if (policy.zrp_request & ZPOOL_TRY_REWIND) { 1697 zpool_rewind_exclaim(hdl, newname ? origname : thename, 1698 B_TRUE, nv); 1699 nvlist_free(nv); 1700 return (-1); 1701 } 1702 1703 if (newname == NULL) 1704 (void) snprintf(desc, sizeof (desc), 1705 dgettext(TEXT_DOMAIN, "cannot import '%s'"), 1706 thename); 1707 else 1708 (void) snprintf(desc, sizeof (desc), 1709 dgettext(TEXT_DOMAIN, "cannot import '%s' as '%s'"), 1710 origname, thename); 1711 1712 switch (error) { 1713 case ENOTSUP: 1714 if (nv != NULL && nvlist_lookup_nvlist(nv, 1715 ZPOOL_CONFIG_LOAD_INFO, &nvinfo) == 0 && 1716 nvlist_exists(nvinfo, ZPOOL_CONFIG_UNSUP_FEAT)) { 1717 (void) printf(dgettext(TEXT_DOMAIN, "This " 1718 "pool uses the following feature(s) not " 1719 "supported by this system:\n")); 1720 zpool_print_unsup_feat(nv); 1721 if (nvlist_exists(nvinfo, 1722 ZPOOL_CONFIG_CAN_RDONLY)) { 1723 (void) printf(dgettext(TEXT_DOMAIN, 1724 "All unsupported features are only " 1725 "required for writing to the pool." 1726 "\nThe pool can be imported using " 1727 "'-o readonly=on'.\n")); 1728 } 1729 } 1730 /* 1731 * Unsupported version. 1732 */ 1733 (void) zfs_error(hdl, EZFS_BADVERSION, desc); 1734 break; 1735 1736 case EINVAL: 1737 (void) zfs_error(hdl, EZFS_INVALCONFIG, desc); 1738 break; 1739 1740 case EROFS: 1741 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1742 "one or more devices is read only")); 1743 (void) zfs_error(hdl, EZFS_BADDEV, desc); 1744 break; 1745 1746 case ENXIO: 1747 if (nv && nvlist_lookup_nvlist(nv, 1748 ZPOOL_CONFIG_LOAD_INFO, &nvinfo) == 0 && 1749 nvlist_lookup_nvlist(nvinfo, 1750 ZPOOL_CONFIG_MISSING_DEVICES, &missing) == 0) { 1751 (void) printf(dgettext(TEXT_DOMAIN, 1752 "The devices below are missing, use " 1753 "'-m' to import the pool anyway:\n")); 1754 print_vdev_tree(hdl, NULL, missing, 2); 1755 (void) printf("\n"); 1756 } 1757 (void) zpool_standard_error(hdl, error, desc); 1758 break; 1759 1760 case EEXIST: 1761 (void) zpool_standard_error(hdl, error, desc); 1762 break; 1763 1764 default: 1765 (void) zpool_standard_error(hdl, error, desc); 1766 zpool_explain_recover(hdl, 1767 newname ? origname : thename, -error, nv); 1768 break; 1769 } 1770 1771 nvlist_free(nv); 1772 ret = -1; 1773 } else { 1774 zpool_handle_t *zhp; 1775 1776 /* 1777 * This should never fail, but play it safe anyway. 1778 */ 1779 if (zpool_open_silent(hdl, thename, &zhp) != 0) 1780 ret = -1; 1781 else if (zhp != NULL) 1782 zpool_close(zhp); 1783 if (policy.zrp_request & 1784 (ZPOOL_DO_REWIND | ZPOOL_TRY_REWIND)) { 1785 zpool_rewind_exclaim(hdl, newname ? origname : thename, 1786 ((policy.zrp_request & ZPOOL_TRY_REWIND) != 0), nv); 1787 } 1788 nvlist_free(nv); 1789 return (0); 1790 } 1791 1792 return (ret); 1793 } 1794 1795 /* 1796 * Scan the pool. 1797 */ 1798 int 1799 zpool_scan(zpool_handle_t *zhp, pool_scan_func_t func) 1800 { 1801 zfs_cmd_t zc = { 0 }; 1802 char msg[1024]; 1803 libzfs_handle_t *hdl = zhp->zpool_hdl; 1804 1805 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 1806 zc.zc_cookie = func; 1807 1808 if (zfs_ioctl(hdl, ZFS_IOC_POOL_SCAN, &zc) == 0 || 1809 (errno == ENOENT && func != POOL_SCAN_NONE)) 1810 return (0); 1811 1812 if (func == POOL_SCAN_SCRUB) { 1813 (void) snprintf(msg, sizeof (msg), 1814 dgettext(TEXT_DOMAIN, "cannot scrub %s"), zc.zc_name); 1815 } else if (func == POOL_SCAN_NONE) { 1816 (void) snprintf(msg, sizeof (msg), 1817 dgettext(TEXT_DOMAIN, "cannot cancel scrubbing %s"), 1818 zc.zc_name); 1819 } else { 1820 assert(!"unexpected result"); 1821 } 1822 1823 if (errno == EBUSY) { 1824 nvlist_t *nvroot; 1825 pool_scan_stat_t *ps = NULL; 1826 uint_t psc; 1827 1828 verify(nvlist_lookup_nvlist(zhp->zpool_config, 1829 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 1830 (void) nvlist_lookup_uint64_array(nvroot, 1831 ZPOOL_CONFIG_SCAN_STATS, (uint64_t **)&ps, &psc); 1832 if (ps && ps->pss_func == POOL_SCAN_SCRUB) 1833 return (zfs_error(hdl, EZFS_SCRUBBING, msg)); 1834 else 1835 return (zfs_error(hdl, EZFS_RESILVERING, msg)); 1836 } else if (errno == ENOENT) { 1837 return (zfs_error(hdl, EZFS_NO_SCRUB, msg)); 1838 } else { 1839 return (zpool_standard_error(hdl, errno, msg)); 1840 } 1841 } 1842 1843 /* 1844 * This provides a very minimal check whether a given string is likely a 1845 * c#t#d# style string. Users of this are expected to do their own 1846 * verification of the s# part. 1847 */ 1848 #define CTD_CHECK(str) (str && str[0] == 'c' && isdigit(str[1])) 1849 1850 /* 1851 * More elaborate version for ones which may start with "/dev/dsk/" 1852 * and the like. 1853 */ 1854 static int 1855 ctd_check_path(char *str) 1856 { 1857 /* 1858 * If it starts with a slash, check the last component. 1859 */ 1860 if (str && str[0] == '/') { 1861 char *tmp = strrchr(str, '/'); 1862 1863 /* 1864 * If it ends in "/old", check the second-to-last 1865 * component of the string instead. 1866 */ 1867 if (tmp != str && strcmp(tmp, "/old") == 0) { 1868 for (tmp--; *tmp != '/'; tmp--) 1869 ; 1870 } 1871 str = tmp + 1; 1872 } 1873 return (CTD_CHECK(str)); 1874 } 1875 1876 /* 1877 * Find a vdev that matches the search criteria specified. We use the 1878 * the nvpair name to determine how we should look for the device. 1879 * 'avail_spare' is set to TRUE if the provided guid refers to an AVAIL 1880 * spare; but FALSE if its an INUSE spare. 1881 */ 1882 static nvlist_t * 1883 vdev_to_nvlist_iter(nvlist_t *nv, nvlist_t *search, boolean_t *avail_spare, 1884 boolean_t *l2cache, boolean_t *log) 1885 { 1886 uint_t c, children; 1887 nvlist_t **child; 1888 nvlist_t *ret; 1889 uint64_t is_log; 1890 char *srchkey; 1891 nvpair_t *pair = nvlist_next_nvpair(search, NULL); 1892 1893 /* Nothing to look for */ 1894 if (search == NULL || pair == NULL) 1895 return (NULL); 1896 1897 /* Obtain the key we will use to search */ 1898 srchkey = nvpair_name(pair); 1899 1900 switch (nvpair_type(pair)) { 1901 case DATA_TYPE_UINT64: 1902 if (strcmp(srchkey, ZPOOL_CONFIG_GUID) == 0) { 1903 uint64_t srchval, theguid; 1904 1905 verify(nvpair_value_uint64(pair, &srchval) == 0); 1906 verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, 1907 &theguid) == 0); 1908 if (theguid == srchval) 1909 return (nv); 1910 } 1911 break; 1912 1913 case DATA_TYPE_STRING: { 1914 char *srchval, *val; 1915 1916 verify(nvpair_value_string(pair, &srchval) == 0); 1917 if (nvlist_lookup_string(nv, srchkey, &val) != 0) 1918 break; 1919 1920 /* 1921 * Search for the requested value. Special cases: 1922 * 1923 * - ZPOOL_CONFIG_PATH for whole disk entries. These end in 1924 * "s0" or "s0/old". The "s0" part is hidden from the user, 1925 * but included in the string, so this matches around it. 1926 * - looking for a top-level vdev name (i.e. ZPOOL_CONFIG_TYPE). 1927 * 1928 * Otherwise, all other searches are simple string compares. 1929 */ 1930 if (strcmp(srchkey, ZPOOL_CONFIG_PATH) == 0 && 1931 ctd_check_path(val)) { 1932 uint64_t wholedisk = 0; 1933 1934 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 1935 &wholedisk); 1936 if (wholedisk) { 1937 int slen = strlen(srchval); 1938 int vlen = strlen(val); 1939 1940 if (slen != vlen - 2) 1941 break; 1942 1943 /* 1944 * make_leaf_vdev() should only set 1945 * wholedisk for ZPOOL_CONFIG_PATHs which 1946 * will include "/dev/dsk/", giving plenty of 1947 * room for the indices used next. 1948 */ 1949 ASSERT(vlen >= 6); 1950 1951 /* 1952 * strings identical except trailing "s0" 1953 */ 1954 if (strcmp(&val[vlen - 2], "s0") == 0 && 1955 strncmp(srchval, val, slen) == 0) 1956 return (nv); 1957 1958 /* 1959 * strings identical except trailing "s0/old" 1960 */ 1961 if (strcmp(&val[vlen - 6], "s0/old") == 0 && 1962 strcmp(&srchval[slen - 4], "/old") == 0 && 1963 strncmp(srchval, val, slen - 4) == 0) 1964 return (nv); 1965 1966 break; 1967 } 1968 } else if (strcmp(srchkey, ZPOOL_CONFIG_TYPE) == 0 && val) { 1969 char *type, *idx, *end, *p; 1970 uint64_t id, vdev_id; 1971 1972 /* 1973 * Determine our vdev type, keeping in mind 1974 * that the srchval is composed of a type and 1975 * vdev id pair (i.e. mirror-4). 1976 */ 1977 if ((type = strdup(srchval)) == NULL) 1978 return (NULL); 1979 1980 if ((p = strrchr(type, '-')) == NULL) { 1981 free(type); 1982 break; 1983 } 1984 idx = p + 1; 1985 *p = '\0'; 1986 1987 /* 1988 * If the types don't match then keep looking. 1989 */ 1990 if (strncmp(val, type, strlen(val)) != 0) { 1991 free(type); 1992 break; 1993 } 1994 1995 verify(strncmp(type, VDEV_TYPE_RAIDZ, 1996 strlen(VDEV_TYPE_RAIDZ)) == 0 || 1997 strncmp(type, VDEV_TYPE_MIRROR, 1998 strlen(VDEV_TYPE_MIRROR)) == 0); 1999 verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, 2000 &id) == 0); 2001 2002 errno = 0; 2003 vdev_id = strtoull(idx, &end, 10); 2004 2005 free(type); 2006 if (errno != 0) 2007 return (NULL); 2008 2009 /* 2010 * Now verify that we have the correct vdev id. 2011 */ 2012 if (vdev_id == id) 2013 return (nv); 2014 } 2015 2016 /* 2017 * Common case 2018 */ 2019 if (strcmp(srchval, val) == 0) 2020 return (nv); 2021 break; 2022 } 2023 2024 default: 2025 break; 2026 } 2027 2028 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 2029 &child, &children) != 0) 2030 return (NULL); 2031 2032 for (c = 0; c < children; c++) { 2033 if ((ret = vdev_to_nvlist_iter(child[c], search, 2034 avail_spare, l2cache, NULL)) != NULL) { 2035 /* 2036 * The 'is_log' value is only set for the toplevel 2037 * vdev, not the leaf vdevs. So we always lookup the 2038 * log device from the root of the vdev tree (where 2039 * 'log' is non-NULL). 2040 */ 2041 if (log != NULL && 2042 nvlist_lookup_uint64(child[c], 2043 ZPOOL_CONFIG_IS_LOG, &is_log) == 0 && 2044 is_log) { 2045 *log = B_TRUE; 2046 } 2047 return (ret); 2048 } 2049 } 2050 2051 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES, 2052 &child, &children) == 0) { 2053 for (c = 0; c < children; c++) { 2054 if ((ret = vdev_to_nvlist_iter(child[c], search, 2055 avail_spare, l2cache, NULL)) != NULL) { 2056 *avail_spare = B_TRUE; 2057 return (ret); 2058 } 2059 } 2060 } 2061 2062 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE, 2063 &child, &children) == 0) { 2064 for (c = 0; c < children; c++) { 2065 if ((ret = vdev_to_nvlist_iter(child[c], search, 2066 avail_spare, l2cache, NULL)) != NULL) { 2067 *l2cache = B_TRUE; 2068 return (ret); 2069 } 2070 } 2071 } 2072 2073 return (NULL); 2074 } 2075 2076 /* 2077 * Given a physical path (minus the "/devices" prefix), find the 2078 * associated vdev. 2079 */ 2080 nvlist_t * 2081 zpool_find_vdev_by_physpath(zpool_handle_t *zhp, const char *ppath, 2082 boolean_t *avail_spare, boolean_t *l2cache, boolean_t *log) 2083 { 2084 nvlist_t *search, *nvroot, *ret; 2085 2086 verify(nvlist_alloc(&search, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2087 verify(nvlist_add_string(search, ZPOOL_CONFIG_PHYS_PATH, ppath) == 0); 2088 2089 verify(nvlist_lookup_nvlist(zhp->zpool_config, ZPOOL_CONFIG_VDEV_TREE, 2090 &nvroot) == 0); 2091 2092 *avail_spare = B_FALSE; 2093 *l2cache = B_FALSE; 2094 if (log != NULL) 2095 *log = B_FALSE; 2096 ret = vdev_to_nvlist_iter(nvroot, search, avail_spare, l2cache, log); 2097 nvlist_free(search); 2098 2099 return (ret); 2100 } 2101 2102 /* 2103 * Determine if we have an "interior" top-level vdev (i.e mirror/raidz). 2104 */ 2105 boolean_t 2106 zpool_vdev_is_interior(const char *name) 2107 { 2108 if (strncmp(name, VDEV_TYPE_RAIDZ, strlen(VDEV_TYPE_RAIDZ)) == 0 || 2109 strncmp(name, VDEV_TYPE_MIRROR, strlen(VDEV_TYPE_MIRROR)) == 0) 2110 return (B_TRUE); 2111 return (B_FALSE); 2112 } 2113 2114 nvlist_t * 2115 zpool_find_vdev(zpool_handle_t *zhp, const char *path, boolean_t *avail_spare, 2116 boolean_t *l2cache, boolean_t *log) 2117 { 2118 char buf[MAXPATHLEN]; 2119 char *end; 2120 nvlist_t *nvroot, *search, *ret; 2121 uint64_t guid; 2122 2123 verify(nvlist_alloc(&search, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2124 2125 guid = strtoull(path, &end, 10); 2126 if (guid != 0 && *end == '\0') { 2127 verify(nvlist_add_uint64(search, ZPOOL_CONFIG_GUID, guid) == 0); 2128 } else if (zpool_vdev_is_interior(path)) { 2129 verify(nvlist_add_string(search, ZPOOL_CONFIG_TYPE, path) == 0); 2130 } else if (path[0] != '/') { 2131 (void) snprintf(buf, sizeof (buf), "%s%s", "/dev/dsk/", path); 2132 verify(nvlist_add_string(search, ZPOOL_CONFIG_PATH, buf) == 0); 2133 } else { 2134 verify(nvlist_add_string(search, ZPOOL_CONFIG_PATH, path) == 0); 2135 } 2136 2137 verify(nvlist_lookup_nvlist(zhp->zpool_config, ZPOOL_CONFIG_VDEV_TREE, 2138 &nvroot) == 0); 2139 2140 *avail_spare = B_FALSE; 2141 *l2cache = B_FALSE; 2142 if (log != NULL) 2143 *log = B_FALSE; 2144 ret = vdev_to_nvlist_iter(nvroot, search, avail_spare, l2cache, log); 2145 nvlist_free(search); 2146 2147 return (ret); 2148 } 2149 2150 static int 2151 vdev_online(nvlist_t *nv) 2152 { 2153 uint64_t ival; 2154 2155 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, &ival) == 0 || 2156 nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, &ival) == 0 || 2157 nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, &ival) == 0) 2158 return (0); 2159 2160 return (1); 2161 } 2162 2163 /* 2164 * Helper function for zpool_get_physpaths(). 2165 */ 2166 static int 2167 vdev_get_one_physpath(nvlist_t *config, char *physpath, size_t physpath_size, 2168 size_t *bytes_written) 2169 { 2170 size_t bytes_left, pos, rsz; 2171 char *tmppath; 2172 const char *format; 2173 2174 if (nvlist_lookup_string(config, ZPOOL_CONFIG_PHYS_PATH, 2175 &tmppath) != 0) 2176 return (EZFS_NODEVICE); 2177 2178 pos = *bytes_written; 2179 bytes_left = physpath_size - pos; 2180 format = (pos == 0) ? "%s" : " %s"; 2181 2182 rsz = snprintf(physpath + pos, bytes_left, format, tmppath); 2183 *bytes_written += rsz; 2184 2185 if (rsz >= bytes_left) { 2186 /* if physpath was not copied properly, clear it */ 2187 if (bytes_left != 0) { 2188 physpath[pos] = 0; 2189 } 2190 return (EZFS_NOSPC); 2191 } 2192 return (0); 2193 } 2194 2195 static int 2196 vdev_get_physpaths(nvlist_t *nv, char *physpath, size_t phypath_size, 2197 size_t *rsz, boolean_t is_spare) 2198 { 2199 char *type; 2200 int ret; 2201 2202 if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) 2203 return (EZFS_INVALCONFIG); 2204 2205 if (strcmp(type, VDEV_TYPE_DISK) == 0) { 2206 /* 2207 * An active spare device has ZPOOL_CONFIG_IS_SPARE set. 2208 * For a spare vdev, we only want to boot from the active 2209 * spare device. 2210 */ 2211 if (is_spare) { 2212 uint64_t spare = 0; 2213 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, 2214 &spare); 2215 if (!spare) 2216 return (EZFS_INVALCONFIG); 2217 } 2218 2219 if (vdev_online(nv)) { 2220 if ((ret = vdev_get_one_physpath(nv, physpath, 2221 phypath_size, rsz)) != 0) 2222 return (ret); 2223 } 2224 } else if (strcmp(type, VDEV_TYPE_MIRROR) == 0 || 2225 strcmp(type, VDEV_TYPE_REPLACING) == 0 || 2226 (is_spare = (strcmp(type, VDEV_TYPE_SPARE) == 0))) { 2227 nvlist_t **child; 2228 uint_t count; 2229 int i, ret; 2230 2231 if (nvlist_lookup_nvlist_array(nv, 2232 ZPOOL_CONFIG_CHILDREN, &child, &count) != 0) 2233 return (EZFS_INVALCONFIG); 2234 2235 for (i = 0; i < count; i++) { 2236 ret = vdev_get_physpaths(child[i], physpath, 2237 phypath_size, rsz, is_spare); 2238 if (ret == EZFS_NOSPC) 2239 return (ret); 2240 } 2241 } 2242 2243 return (EZFS_POOL_INVALARG); 2244 } 2245 2246 /* 2247 * Get phys_path for a root pool config. 2248 * Return 0 on success; non-zero on failure. 2249 */ 2250 static int 2251 zpool_get_config_physpath(nvlist_t *config, char *physpath, size_t phypath_size) 2252 { 2253 size_t rsz; 2254 nvlist_t *vdev_root; 2255 nvlist_t **child; 2256 uint_t count; 2257 char *type; 2258 2259 rsz = 0; 2260 2261 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 2262 &vdev_root) != 0) 2263 return (EZFS_INVALCONFIG); 2264 2265 if (nvlist_lookup_string(vdev_root, ZPOOL_CONFIG_TYPE, &type) != 0 || 2266 nvlist_lookup_nvlist_array(vdev_root, ZPOOL_CONFIG_CHILDREN, 2267 &child, &count) != 0) 2268 return (EZFS_INVALCONFIG); 2269 2270 /* 2271 * root pool can only have a single top-level vdev. 2272 */ 2273 if (strcmp(type, VDEV_TYPE_ROOT) != 0 || count != 1) 2274 return (EZFS_POOL_INVALARG); 2275 2276 (void) vdev_get_physpaths(child[0], physpath, phypath_size, &rsz, 2277 B_FALSE); 2278 2279 /* No online devices */ 2280 if (rsz == 0) 2281 return (EZFS_NODEVICE); 2282 2283 return (0); 2284 } 2285 2286 /* 2287 * Get phys_path for a root pool 2288 * Return 0 on success; non-zero on failure. 2289 */ 2290 int 2291 zpool_get_physpath(zpool_handle_t *zhp, char *physpath, size_t phypath_size) 2292 { 2293 return (zpool_get_config_physpath(zhp->zpool_config, physpath, 2294 phypath_size)); 2295 } 2296 2297 /* 2298 * If the device has being dynamically expanded then we need to relabel 2299 * the disk to use the new unallocated space. 2300 */ 2301 static int 2302 zpool_relabel_disk(libzfs_handle_t *hdl, const char *name) 2303 { 2304 char path[MAXPATHLEN]; 2305 char errbuf[1024]; 2306 int fd, error; 2307 int (*_efi_use_whole_disk)(int); 2308 2309 if ((_efi_use_whole_disk = (int (*)(int))dlsym(RTLD_DEFAULT, 2310 "efi_use_whole_disk")) == NULL) 2311 return (-1); 2312 2313 (void) snprintf(path, sizeof (path), "%s/%s", RDISK_ROOT, name); 2314 2315 if ((fd = open(path, O_RDWR | O_NDELAY)) < 0) { 2316 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "cannot " 2317 "relabel '%s': unable to open device"), name); 2318 return (zfs_error(hdl, EZFS_OPENFAILED, errbuf)); 2319 } 2320 2321 /* 2322 * It's possible that we might encounter an error if the device 2323 * does not have any unallocated space left. If so, we simply 2324 * ignore that error and continue on. 2325 */ 2326 error = _efi_use_whole_disk(fd); 2327 (void) close(fd); 2328 if (error && error != VT_ENOSPC) { 2329 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "cannot " 2330 "relabel '%s': unable to read disk capacity"), name); 2331 return (zfs_error(hdl, EZFS_NOCAP, errbuf)); 2332 } 2333 return (0); 2334 } 2335 2336 /* 2337 * Bring the specified vdev online. The 'flags' parameter is a set of the 2338 * ZFS_ONLINE_* flags. 2339 */ 2340 int 2341 zpool_vdev_online(zpool_handle_t *zhp, const char *path, int flags, 2342 vdev_state_t *newstate) 2343 { 2344 zfs_cmd_t zc = { 0 }; 2345 char msg[1024]; 2346 nvlist_t *tgt; 2347 boolean_t avail_spare, l2cache, islog; 2348 libzfs_handle_t *hdl = zhp->zpool_hdl; 2349 2350 if (flags & ZFS_ONLINE_EXPAND) { 2351 (void) snprintf(msg, sizeof (msg), 2352 dgettext(TEXT_DOMAIN, "cannot expand %s"), path); 2353 } else { 2354 (void) snprintf(msg, sizeof (msg), 2355 dgettext(TEXT_DOMAIN, "cannot online %s"), path); 2356 } 2357 2358 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 2359 if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache, 2360 &islog)) == NULL) 2361 return (zfs_error(hdl, EZFS_NODEVICE, msg)); 2362 2363 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0); 2364 2365 if (avail_spare) 2366 return (zfs_error(hdl, EZFS_ISSPARE, msg)); 2367 2368 if (flags & ZFS_ONLINE_EXPAND || 2369 zpool_get_prop_int(zhp, ZPOOL_PROP_AUTOEXPAND, NULL)) { 2370 char *pathname = NULL; 2371 uint64_t wholedisk = 0; 2372 2373 (void) nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_WHOLE_DISK, 2374 &wholedisk); 2375 verify(nvlist_lookup_string(tgt, ZPOOL_CONFIG_PATH, 2376 &pathname) == 0); 2377 2378 /* 2379 * XXX - L2ARC 1.0 devices can't support expansion. 2380 */ 2381 if (l2cache) { 2382 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2383 "cannot expand cache devices")); 2384 return (zfs_error(hdl, EZFS_VDEVNOTSUP, msg)); 2385 } 2386 2387 if (wholedisk) { 2388 pathname += strlen(DISK_ROOT) + 1; 2389 (void) zpool_relabel_disk(hdl, pathname); 2390 } 2391 } 2392 2393 zc.zc_cookie = VDEV_STATE_ONLINE; 2394 zc.zc_obj = flags; 2395 2396 if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SET_STATE, &zc) != 0) { 2397 if (errno == EINVAL) { 2398 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "was split " 2399 "from this pool into a new one. Use '%s' " 2400 "instead"), "zpool detach"); 2401 return (zfs_error(hdl, EZFS_POSTSPLIT_ONLINE, msg)); 2402 } 2403 return (zpool_standard_error(hdl, errno, msg)); 2404 } 2405 2406 *newstate = zc.zc_cookie; 2407 return (0); 2408 } 2409 2410 /* 2411 * Take the specified vdev offline 2412 */ 2413 int 2414 zpool_vdev_offline(zpool_handle_t *zhp, const char *path, boolean_t istmp) 2415 { 2416 zfs_cmd_t zc = { 0 }; 2417 char msg[1024]; 2418 nvlist_t *tgt; 2419 boolean_t avail_spare, l2cache; 2420 libzfs_handle_t *hdl = zhp->zpool_hdl; 2421 2422 (void) snprintf(msg, sizeof (msg), 2423 dgettext(TEXT_DOMAIN, "cannot offline %s"), path); 2424 2425 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 2426 if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache, 2427 NULL)) == NULL) 2428 return (zfs_error(hdl, EZFS_NODEVICE, msg)); 2429 2430 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0); 2431 2432 if (avail_spare) 2433 return (zfs_error(hdl, EZFS_ISSPARE, msg)); 2434 2435 zc.zc_cookie = VDEV_STATE_OFFLINE; 2436 zc.zc_obj = istmp ? ZFS_OFFLINE_TEMPORARY : 0; 2437 2438 if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SET_STATE, &zc) == 0) 2439 return (0); 2440 2441 switch (errno) { 2442 case EBUSY: 2443 2444 /* 2445 * There are no other replicas of this device. 2446 */ 2447 return (zfs_error(hdl, EZFS_NOREPLICAS, msg)); 2448 2449 case EEXIST: 2450 /* 2451 * The log device has unplayed logs 2452 */ 2453 return (zfs_error(hdl, EZFS_UNPLAYED_LOGS, msg)); 2454 2455 default: 2456 return (zpool_standard_error(hdl, errno, msg)); 2457 } 2458 } 2459 2460 /* 2461 * Mark the given vdev faulted. 2462 */ 2463 int 2464 zpool_vdev_fault(zpool_handle_t *zhp, uint64_t guid, vdev_aux_t aux) 2465 { 2466 zfs_cmd_t zc = { 0 }; 2467 char msg[1024]; 2468 libzfs_handle_t *hdl = zhp->zpool_hdl; 2469 2470 (void) snprintf(msg, sizeof (msg), 2471 dgettext(TEXT_DOMAIN, "cannot fault %llu"), guid); 2472 2473 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 2474 zc.zc_guid = guid; 2475 zc.zc_cookie = VDEV_STATE_FAULTED; 2476 zc.zc_obj = aux; 2477 2478 if (ioctl(hdl->libzfs_fd, ZFS_IOC_VDEV_SET_STATE, &zc) == 0) 2479 return (0); 2480 2481 switch (errno) { 2482 case EBUSY: 2483 2484 /* 2485 * There are no other replicas of this device. 2486 */ 2487 return (zfs_error(hdl, EZFS_NOREPLICAS, msg)); 2488 2489 default: 2490 return (zpool_standard_error(hdl, errno, msg)); 2491 } 2492 2493 } 2494 2495 /* 2496 * Mark the given vdev degraded. 2497 */ 2498 int 2499 zpool_vdev_degrade(zpool_handle_t *zhp, uint64_t guid, vdev_aux_t aux) 2500 { 2501 zfs_cmd_t zc = { 0 }; 2502 char msg[1024]; 2503 libzfs_handle_t *hdl = zhp->zpool_hdl; 2504 2505 (void) snprintf(msg, sizeof (msg), 2506 dgettext(TEXT_DOMAIN, "cannot degrade %llu"), guid); 2507 2508 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 2509 zc.zc_guid = guid; 2510 zc.zc_cookie = VDEV_STATE_DEGRADED; 2511 zc.zc_obj = aux; 2512 2513 if (ioctl(hdl->libzfs_fd, ZFS_IOC_VDEV_SET_STATE, &zc) == 0) 2514 return (0); 2515 2516 return (zpool_standard_error(hdl, errno, msg)); 2517 } 2518 2519 /* 2520 * Returns TRUE if the given nvlist is a vdev that was originally swapped in as 2521 * a hot spare. 2522 */ 2523 static boolean_t 2524 is_replacing_spare(nvlist_t *search, nvlist_t *tgt, int which) 2525 { 2526 nvlist_t **child; 2527 uint_t c, children; 2528 char *type; 2529 2530 if (nvlist_lookup_nvlist_array(search, ZPOOL_CONFIG_CHILDREN, &child, 2531 &children) == 0) { 2532 verify(nvlist_lookup_string(search, ZPOOL_CONFIG_TYPE, 2533 &type) == 0); 2534 2535 if (strcmp(type, VDEV_TYPE_SPARE) == 0 && 2536 children == 2 && child[which] == tgt) 2537 return (B_TRUE); 2538 2539 for (c = 0; c < children; c++) 2540 if (is_replacing_spare(child[c], tgt, which)) 2541 return (B_TRUE); 2542 } 2543 2544 return (B_FALSE); 2545 } 2546 2547 /* 2548 * Attach new_disk (fully described by nvroot) to old_disk. 2549 * If 'replacing' is specified, the new disk will replace the old one. 2550 */ 2551 int 2552 zpool_vdev_attach(zpool_handle_t *zhp, 2553 const char *old_disk, const char *new_disk, nvlist_t *nvroot, int replacing) 2554 { 2555 zfs_cmd_t zc = { 0 }; 2556 char msg[1024]; 2557 int ret; 2558 nvlist_t *tgt; 2559 boolean_t avail_spare, l2cache, islog; 2560 uint64_t val; 2561 char *newname; 2562 nvlist_t **child; 2563 uint_t children; 2564 nvlist_t *config_root; 2565 libzfs_handle_t *hdl = zhp->zpool_hdl; 2566 boolean_t rootpool = zpool_is_bootable(zhp); 2567 2568 if (replacing) 2569 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN, 2570 "cannot replace %s with %s"), old_disk, new_disk); 2571 else 2572 (void) snprintf(msg, sizeof (msg), dgettext(TEXT_DOMAIN, 2573 "cannot attach %s to %s"), new_disk, old_disk); 2574 2575 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 2576 if ((tgt = zpool_find_vdev(zhp, old_disk, &avail_spare, &l2cache, 2577 &islog)) == 0) 2578 return (zfs_error(hdl, EZFS_NODEVICE, msg)); 2579 2580 if (avail_spare) 2581 return (zfs_error(hdl, EZFS_ISSPARE, msg)); 2582 2583 if (l2cache) 2584 return (zfs_error(hdl, EZFS_ISL2CACHE, msg)); 2585 2586 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0); 2587 zc.zc_cookie = replacing; 2588 2589 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 2590 &child, &children) != 0 || children != 1) { 2591 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2592 "new device must be a single disk")); 2593 return (zfs_error(hdl, EZFS_INVALCONFIG, msg)); 2594 } 2595 2596 verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL), 2597 ZPOOL_CONFIG_VDEV_TREE, &config_root) == 0); 2598 2599 if ((newname = zpool_vdev_name(NULL, NULL, child[0], B_FALSE)) == NULL) 2600 return (-1); 2601 2602 /* 2603 * If the target is a hot spare that has been swapped in, we can only 2604 * replace it with another hot spare. 2605 */ 2606 if (replacing && 2607 nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_IS_SPARE, &val) == 0 && 2608 (zpool_find_vdev(zhp, newname, &avail_spare, &l2cache, 2609 NULL) == NULL || !avail_spare) && 2610 is_replacing_spare(config_root, tgt, 1)) { 2611 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2612 "can only be replaced by another hot spare")); 2613 free(newname); 2614 return (zfs_error(hdl, EZFS_BADTARGET, msg)); 2615 } 2616 2617 free(newname); 2618 2619 if (zcmd_write_conf_nvlist(hdl, &zc, nvroot) != 0) 2620 return (-1); 2621 2622 ret = zfs_ioctl(hdl, ZFS_IOC_VDEV_ATTACH, &zc); 2623 2624 zcmd_free_nvlists(&zc); 2625 2626 if (ret == 0) { 2627 if (rootpool) { 2628 /* 2629 * XXX need a better way to prevent user from 2630 * booting up a half-baked vdev. 2631 */ 2632 (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Make " 2633 "sure to wait until resilver is done " 2634 "before rebooting.\n")); 2635 } 2636 return (0); 2637 } 2638 2639 switch (errno) { 2640 case ENOTSUP: 2641 /* 2642 * Can't attach to or replace this type of vdev. 2643 */ 2644 if (replacing) { 2645 uint64_t version = zpool_get_prop_int(zhp, 2646 ZPOOL_PROP_VERSION, NULL); 2647 2648 if (islog) 2649 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2650 "cannot replace a log with a spare")); 2651 else if (version >= SPA_VERSION_MULTI_REPLACE) 2652 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2653 "already in replacing/spare config; wait " 2654 "for completion or use 'zpool detach'")); 2655 else 2656 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2657 "cannot replace a replacing device")); 2658 } else { 2659 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2660 "can only attach to mirrors and top-level " 2661 "disks")); 2662 } 2663 (void) zfs_error(hdl, EZFS_BADTARGET, msg); 2664 break; 2665 2666 case EINVAL: 2667 /* 2668 * The new device must be a single disk. 2669 */ 2670 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2671 "new device must be a single disk")); 2672 (void) zfs_error(hdl, EZFS_INVALCONFIG, msg); 2673 break; 2674 2675 case EBUSY: 2676 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "%s is busy"), 2677 new_disk); 2678 (void) zfs_error(hdl, EZFS_BADDEV, msg); 2679 break; 2680 2681 case EOVERFLOW: 2682 /* 2683 * The new device is too small. 2684 */ 2685 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2686 "device is too small")); 2687 (void) zfs_error(hdl, EZFS_BADDEV, msg); 2688 break; 2689 2690 case EDOM: 2691 /* 2692 * The new device has a different alignment requirement. 2693 */ 2694 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2695 "devices have different sector alignment")); 2696 (void) zfs_error(hdl, EZFS_BADDEV, msg); 2697 break; 2698 2699 case ENAMETOOLONG: 2700 /* 2701 * The resulting top-level vdev spec won't fit in the label. 2702 */ 2703 (void) zfs_error(hdl, EZFS_DEVOVERFLOW, msg); 2704 break; 2705 2706 default: 2707 (void) zpool_standard_error(hdl, errno, msg); 2708 } 2709 2710 return (-1); 2711 } 2712 2713 /* 2714 * Detach the specified device. 2715 */ 2716 int 2717 zpool_vdev_detach(zpool_handle_t *zhp, const char *path) 2718 { 2719 zfs_cmd_t zc = { 0 }; 2720 char msg[1024]; 2721 nvlist_t *tgt; 2722 boolean_t avail_spare, l2cache; 2723 libzfs_handle_t *hdl = zhp->zpool_hdl; 2724 2725 (void) snprintf(msg, sizeof (msg), 2726 dgettext(TEXT_DOMAIN, "cannot detach %s"), path); 2727 2728 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 2729 if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache, 2730 NULL)) == 0) 2731 return (zfs_error(hdl, EZFS_NODEVICE, msg)); 2732 2733 if (avail_spare) 2734 return (zfs_error(hdl, EZFS_ISSPARE, msg)); 2735 2736 if (l2cache) 2737 return (zfs_error(hdl, EZFS_ISL2CACHE, msg)); 2738 2739 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0); 2740 2741 if (zfs_ioctl(hdl, ZFS_IOC_VDEV_DETACH, &zc) == 0) 2742 return (0); 2743 2744 switch (errno) { 2745 2746 case ENOTSUP: 2747 /* 2748 * Can't detach from this type of vdev. 2749 */ 2750 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "only " 2751 "applicable to mirror and replacing vdevs")); 2752 (void) zfs_error(hdl, EZFS_BADTARGET, msg); 2753 break; 2754 2755 case EBUSY: 2756 /* 2757 * There are no other replicas of this device. 2758 */ 2759 (void) zfs_error(hdl, EZFS_NOREPLICAS, msg); 2760 break; 2761 2762 default: 2763 (void) zpool_standard_error(hdl, errno, msg); 2764 } 2765 2766 return (-1); 2767 } 2768 2769 /* 2770 * Find a mirror vdev in the source nvlist. 2771 * 2772 * The mchild array contains a list of disks in one of the top-level mirrors 2773 * of the source pool. The schild array contains a list of disks that the 2774 * user specified on the command line. We loop over the mchild array to 2775 * see if any entry in the schild array matches. 2776 * 2777 * If a disk in the mchild array is found in the schild array, we return 2778 * the index of that entry. Otherwise we return -1. 2779 */ 2780 static int 2781 find_vdev_entry(zpool_handle_t *zhp, nvlist_t **mchild, uint_t mchildren, 2782 nvlist_t **schild, uint_t schildren) 2783 { 2784 uint_t mc; 2785 2786 for (mc = 0; mc < mchildren; mc++) { 2787 uint_t sc; 2788 char *mpath = zpool_vdev_name(zhp->zpool_hdl, zhp, 2789 mchild[mc], B_FALSE); 2790 2791 for (sc = 0; sc < schildren; sc++) { 2792 char *spath = zpool_vdev_name(zhp->zpool_hdl, zhp, 2793 schild[sc], B_FALSE); 2794 boolean_t result = (strcmp(mpath, spath) == 0); 2795 2796 free(spath); 2797 if (result) { 2798 free(mpath); 2799 return (mc); 2800 } 2801 } 2802 2803 free(mpath); 2804 } 2805 2806 return (-1); 2807 } 2808 2809 /* 2810 * Split a mirror pool. If newroot points to null, then a new nvlist 2811 * is generated and it is the responsibility of the caller to free it. 2812 */ 2813 int 2814 zpool_vdev_split(zpool_handle_t *zhp, char *newname, nvlist_t **newroot, 2815 nvlist_t *props, splitflags_t flags) 2816 { 2817 zfs_cmd_t zc = { 0 }; 2818 char msg[1024]; 2819 nvlist_t *tree, *config, **child, **newchild, *newconfig = NULL; 2820 nvlist_t **varray = NULL, *zc_props = NULL; 2821 uint_t c, children, newchildren, lastlog = 0, vcount, found = 0; 2822 libzfs_handle_t *hdl = zhp->zpool_hdl; 2823 uint64_t vers; 2824 boolean_t freelist = B_FALSE, memory_err = B_TRUE; 2825 int retval = 0; 2826 2827 (void) snprintf(msg, sizeof (msg), 2828 dgettext(TEXT_DOMAIN, "Unable to split %s"), zhp->zpool_name); 2829 2830 if (!zpool_name_valid(hdl, B_FALSE, newname)) 2831 return (zfs_error(hdl, EZFS_INVALIDNAME, msg)); 2832 2833 if ((config = zpool_get_config(zhp, NULL)) == NULL) { 2834 (void) fprintf(stderr, gettext("Internal error: unable to " 2835 "retrieve pool configuration\n")); 2836 return (-1); 2837 } 2838 2839 verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &tree) 2840 == 0); 2841 verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &vers) == 0); 2842 2843 if (props) { 2844 prop_flags_t flags = { .create = B_FALSE, .import = B_TRUE }; 2845 if ((zc_props = zpool_valid_proplist(hdl, zhp->zpool_name, 2846 props, vers, flags, msg)) == NULL) 2847 return (-1); 2848 } 2849 2850 if (nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN, &child, 2851 &children) != 0) { 2852 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2853 "Source pool is missing vdev tree")); 2854 nvlist_free(zc_props); 2855 return (-1); 2856 } 2857 2858 varray = zfs_alloc(hdl, children * sizeof (nvlist_t *)); 2859 vcount = 0; 2860 2861 if (*newroot == NULL || 2862 nvlist_lookup_nvlist_array(*newroot, ZPOOL_CONFIG_CHILDREN, 2863 &newchild, &newchildren) != 0) 2864 newchildren = 0; 2865 2866 for (c = 0; c < children; c++) { 2867 uint64_t is_log = B_FALSE, is_hole = B_FALSE; 2868 char *type; 2869 nvlist_t **mchild, *vdev; 2870 uint_t mchildren; 2871 int entry; 2872 2873 /* 2874 * Unlike cache & spares, slogs are stored in the 2875 * ZPOOL_CONFIG_CHILDREN array. We filter them out here. 2876 */ 2877 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG, 2878 &is_log); 2879 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 2880 &is_hole); 2881 if (is_log || is_hole) { 2882 /* 2883 * Create a hole vdev and put it in the config. 2884 */ 2885 if (nvlist_alloc(&vdev, NV_UNIQUE_NAME, 0) != 0) 2886 goto out; 2887 if (nvlist_add_string(vdev, ZPOOL_CONFIG_TYPE, 2888 VDEV_TYPE_HOLE) != 0) 2889 goto out; 2890 if (nvlist_add_uint64(vdev, ZPOOL_CONFIG_IS_HOLE, 2891 1) != 0) 2892 goto out; 2893 if (lastlog == 0) 2894 lastlog = vcount; 2895 varray[vcount++] = vdev; 2896 continue; 2897 } 2898 lastlog = 0; 2899 verify(nvlist_lookup_string(child[c], ZPOOL_CONFIG_TYPE, &type) 2900 == 0); 2901 if (strcmp(type, VDEV_TYPE_MIRROR) != 0) { 2902 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2903 "Source pool must be composed only of mirrors\n")); 2904 retval = zfs_error(hdl, EZFS_INVALCONFIG, msg); 2905 goto out; 2906 } 2907 2908 verify(nvlist_lookup_nvlist_array(child[c], 2909 ZPOOL_CONFIG_CHILDREN, &mchild, &mchildren) == 0); 2910 2911 /* find or add an entry for this top-level vdev */ 2912 if (newchildren > 0 && 2913 (entry = find_vdev_entry(zhp, mchild, mchildren, 2914 newchild, newchildren)) >= 0) { 2915 /* We found a disk that the user specified. */ 2916 vdev = mchild[entry]; 2917 ++found; 2918 } else { 2919 /* User didn't specify a disk for this vdev. */ 2920 vdev = mchild[mchildren - 1]; 2921 } 2922 2923 if (nvlist_dup(vdev, &varray[vcount++], 0) != 0) 2924 goto out; 2925 } 2926 2927 /* did we find every disk the user specified? */ 2928 if (found != newchildren) { 2929 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "Device list must " 2930 "include at most one disk from each mirror")); 2931 retval = zfs_error(hdl, EZFS_INVALCONFIG, msg); 2932 goto out; 2933 } 2934 2935 /* Prepare the nvlist for populating. */ 2936 if (*newroot == NULL) { 2937 if (nvlist_alloc(newroot, NV_UNIQUE_NAME, 0) != 0) 2938 goto out; 2939 freelist = B_TRUE; 2940 if (nvlist_add_string(*newroot, ZPOOL_CONFIG_TYPE, 2941 VDEV_TYPE_ROOT) != 0) 2942 goto out; 2943 } else { 2944 verify(nvlist_remove_all(*newroot, ZPOOL_CONFIG_CHILDREN) == 0); 2945 } 2946 2947 /* Add all the children we found */ 2948 if (nvlist_add_nvlist_array(*newroot, ZPOOL_CONFIG_CHILDREN, varray, 2949 lastlog == 0 ? vcount : lastlog) != 0) 2950 goto out; 2951 2952 /* 2953 * If we're just doing a dry run, exit now with success. 2954 */ 2955 if (flags.dryrun) { 2956 memory_err = B_FALSE; 2957 freelist = B_FALSE; 2958 goto out; 2959 } 2960 2961 /* now build up the config list & call the ioctl */ 2962 if (nvlist_alloc(&newconfig, NV_UNIQUE_NAME, 0) != 0) 2963 goto out; 2964 2965 if (nvlist_add_nvlist(newconfig, 2966 ZPOOL_CONFIG_VDEV_TREE, *newroot) != 0 || 2967 nvlist_add_string(newconfig, 2968 ZPOOL_CONFIG_POOL_NAME, newname) != 0 || 2969 nvlist_add_uint64(newconfig, ZPOOL_CONFIG_VERSION, vers) != 0) 2970 goto out; 2971 2972 /* 2973 * The new pool is automatically part of the namespace unless we 2974 * explicitly export it. 2975 */ 2976 if (!flags.import) 2977 zc.zc_cookie = ZPOOL_EXPORT_AFTER_SPLIT; 2978 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 2979 (void) strlcpy(zc.zc_string, newname, sizeof (zc.zc_string)); 2980 if (zcmd_write_conf_nvlist(hdl, &zc, newconfig) != 0) 2981 goto out; 2982 if (zc_props != NULL && zcmd_write_src_nvlist(hdl, &zc, zc_props) != 0) 2983 goto out; 2984 2985 if (zfs_ioctl(hdl, ZFS_IOC_VDEV_SPLIT, &zc) != 0) { 2986 retval = zpool_standard_error(hdl, errno, msg); 2987 goto out; 2988 } 2989 2990 freelist = B_FALSE; 2991 memory_err = B_FALSE; 2992 2993 out: 2994 if (varray != NULL) { 2995 int v; 2996 2997 for (v = 0; v < vcount; v++) 2998 nvlist_free(varray[v]); 2999 free(varray); 3000 } 3001 zcmd_free_nvlists(&zc); 3002 nvlist_free(zc_props); 3003 nvlist_free(newconfig); 3004 if (freelist) { 3005 nvlist_free(*newroot); 3006 *newroot = NULL; 3007 } 3008 3009 if (retval != 0) 3010 return (retval); 3011 3012 if (memory_err) 3013 return (no_memory(hdl)); 3014 3015 return (0); 3016 } 3017 3018 /* 3019 * Remove the given device. Currently, this is supported only for hot spares 3020 * and level 2 cache devices. 3021 */ 3022 int 3023 zpool_vdev_remove(zpool_handle_t *zhp, const char *path) 3024 { 3025 zfs_cmd_t zc = { 0 }; 3026 char msg[1024]; 3027 nvlist_t *tgt; 3028 boolean_t avail_spare, l2cache, islog; 3029 libzfs_handle_t *hdl = zhp->zpool_hdl; 3030 uint64_t version; 3031 3032 (void) snprintf(msg, sizeof (msg), 3033 dgettext(TEXT_DOMAIN, "cannot remove %s"), path); 3034 3035 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 3036 if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, &l2cache, 3037 &islog)) == 0) 3038 return (zfs_error(hdl, EZFS_NODEVICE, msg)); 3039 /* 3040 * XXX - this should just go away. 3041 */ 3042 if (!avail_spare && !l2cache && !islog) { 3043 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3044 "only inactive hot spares, cache, top-level, " 3045 "or log devices can be removed")); 3046 return (zfs_error(hdl, EZFS_NODEVICE, msg)); 3047 } 3048 3049 version = zpool_get_prop_int(zhp, ZPOOL_PROP_VERSION, NULL); 3050 if (islog && version < SPA_VERSION_HOLES) { 3051 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3052 "pool must be upgrade to support log removal")); 3053 return (zfs_error(hdl, EZFS_BADVERSION, msg)); 3054 } 3055 3056 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, &zc.zc_guid) == 0); 3057 3058 if (zfs_ioctl(hdl, ZFS_IOC_VDEV_REMOVE, &zc) == 0) 3059 return (0); 3060 3061 return (zpool_standard_error(hdl, errno, msg)); 3062 } 3063 3064 /* 3065 * Clear the errors for the pool, or the particular device if specified. 3066 */ 3067 int 3068 zpool_clear(zpool_handle_t *zhp, const char *path, nvlist_t *rewindnvl) 3069 { 3070 zfs_cmd_t zc = { 0 }; 3071 char msg[1024]; 3072 nvlist_t *tgt; 3073 zpool_rewind_policy_t policy; 3074 boolean_t avail_spare, l2cache; 3075 libzfs_handle_t *hdl = zhp->zpool_hdl; 3076 nvlist_t *nvi = NULL; 3077 int error; 3078 3079 if (path) 3080 (void) snprintf(msg, sizeof (msg), 3081 dgettext(TEXT_DOMAIN, "cannot clear errors for %s"), 3082 path); 3083 else 3084 (void) snprintf(msg, sizeof (msg), 3085 dgettext(TEXT_DOMAIN, "cannot clear errors for %s"), 3086 zhp->zpool_name); 3087 3088 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 3089 if (path) { 3090 if ((tgt = zpool_find_vdev(zhp, path, &avail_spare, 3091 &l2cache, NULL)) == 0) 3092 return (zfs_error(hdl, EZFS_NODEVICE, msg)); 3093 3094 /* 3095 * Don't allow error clearing for hot spares. Do allow 3096 * error clearing for l2cache devices. 3097 */ 3098 if (avail_spare) 3099 return (zfs_error(hdl, EZFS_ISSPARE, msg)); 3100 3101 verify(nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_GUID, 3102 &zc.zc_guid) == 0); 3103 } 3104 3105 zpool_get_rewind_policy(rewindnvl, &policy); 3106 zc.zc_cookie = policy.zrp_request; 3107 3108 if (zcmd_alloc_dst_nvlist(hdl, &zc, zhp->zpool_config_size * 2) != 0) 3109 return (-1); 3110 3111 if (zcmd_write_src_nvlist(hdl, &zc, rewindnvl) != 0) 3112 return (-1); 3113 3114 while ((error = zfs_ioctl(hdl, ZFS_IOC_CLEAR, &zc)) != 0 && 3115 errno == ENOMEM) { 3116 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 3117 zcmd_free_nvlists(&zc); 3118 return (-1); 3119 } 3120 } 3121 3122 if (!error || ((policy.zrp_request & ZPOOL_TRY_REWIND) && 3123 errno != EPERM && errno != EACCES)) { 3124 if (policy.zrp_request & 3125 (ZPOOL_DO_REWIND | ZPOOL_TRY_REWIND)) { 3126 (void) zcmd_read_dst_nvlist(hdl, &zc, &nvi); 3127 zpool_rewind_exclaim(hdl, zc.zc_name, 3128 ((policy.zrp_request & ZPOOL_TRY_REWIND) != 0), 3129 nvi); 3130 nvlist_free(nvi); 3131 } 3132 zcmd_free_nvlists(&zc); 3133 return (0); 3134 } 3135 3136 zcmd_free_nvlists(&zc); 3137 return (zpool_standard_error(hdl, errno, msg)); 3138 } 3139 3140 /* 3141 * Similar to zpool_clear(), but takes a GUID (used by fmd). 3142 */ 3143 int 3144 zpool_vdev_clear(zpool_handle_t *zhp, uint64_t guid) 3145 { 3146 zfs_cmd_t zc = { 0 }; 3147 char msg[1024]; 3148 libzfs_handle_t *hdl = zhp->zpool_hdl; 3149 3150 (void) snprintf(msg, sizeof (msg), 3151 dgettext(TEXT_DOMAIN, "cannot clear errors for %llx"), 3152 guid); 3153 3154 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 3155 zc.zc_guid = guid; 3156 zc.zc_cookie = ZPOOL_NO_REWIND; 3157 3158 if (ioctl(hdl->libzfs_fd, ZFS_IOC_CLEAR, &zc) == 0) 3159 return (0); 3160 3161 return (zpool_standard_error(hdl, errno, msg)); 3162 } 3163 3164 /* 3165 * Change the GUID for a pool. 3166 */ 3167 int 3168 zpool_reguid(zpool_handle_t *zhp) 3169 { 3170 char msg[1024]; 3171 libzfs_handle_t *hdl = zhp->zpool_hdl; 3172 zfs_cmd_t zc = { 0 }; 3173 3174 (void) snprintf(msg, sizeof (msg), 3175 dgettext(TEXT_DOMAIN, "cannot reguid '%s'"), zhp->zpool_name); 3176 3177 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 3178 if (zfs_ioctl(hdl, ZFS_IOC_POOL_REGUID, &zc) == 0) 3179 return (0); 3180 3181 return (zpool_standard_error(hdl, errno, msg)); 3182 } 3183 3184 /* 3185 * Reopen the pool. 3186 */ 3187 int 3188 zpool_reopen(zpool_handle_t *zhp) 3189 { 3190 zfs_cmd_t zc = { 0 }; 3191 char msg[1024]; 3192 libzfs_handle_t *hdl = zhp->zpool_hdl; 3193 3194 (void) snprintf(msg, sizeof (msg), 3195 dgettext(TEXT_DOMAIN, "cannot reopen '%s'"), 3196 zhp->zpool_name); 3197 3198 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 3199 if (zfs_ioctl(hdl, ZFS_IOC_POOL_REOPEN, &zc) == 0) 3200 return (0); 3201 return (zpool_standard_error(hdl, errno, msg)); 3202 } 3203 3204 /* 3205 * Convert from a devid string to a path. 3206 */ 3207 static char * 3208 devid_to_path(char *devid_str) 3209 { 3210 ddi_devid_t devid; 3211 char *minor; 3212 char *path; 3213 devid_nmlist_t *list = NULL; 3214 int ret; 3215 3216 if (devid_str_decode(devid_str, &devid, &minor) != 0) 3217 return (NULL); 3218 3219 ret = devid_deviceid_to_nmlist("/dev", devid, minor, &list); 3220 3221 devid_str_free(minor); 3222 devid_free(devid); 3223 3224 if (ret != 0) 3225 return (NULL); 3226 3227 /* 3228 * In a case the strdup() fails, we will just return NULL below. 3229 */ 3230 path = strdup(list[0].devname); 3231 3232 devid_free_nmlist(list); 3233 3234 return (path); 3235 } 3236 3237 /* 3238 * Convert from a path to a devid string. 3239 */ 3240 static char * 3241 path_to_devid(const char *path) 3242 { 3243 int fd; 3244 ddi_devid_t devid; 3245 char *minor, *ret; 3246 3247 if ((fd = open(path, O_RDONLY)) < 0) 3248 return (NULL); 3249 3250 minor = NULL; 3251 ret = NULL; 3252 if (devid_get(fd, &devid) == 0) { 3253 if (devid_get_minor_name(fd, &minor) == 0) 3254 ret = devid_str_encode(devid, minor); 3255 if (minor != NULL) 3256 devid_str_free(minor); 3257 devid_free(devid); 3258 } 3259 (void) close(fd); 3260 3261 return (ret); 3262 } 3263 3264 /* 3265 * Issue the necessary ioctl() to update the stored path value for the vdev. We 3266 * ignore any failure here, since a common case is for an unprivileged user to 3267 * type 'zpool status', and we'll display the correct information anyway. 3268 */ 3269 static void 3270 set_path(zpool_handle_t *zhp, nvlist_t *nv, const char *path) 3271 { 3272 zfs_cmd_t zc = { 0 }; 3273 3274 (void) strncpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 3275 (void) strncpy(zc.zc_value, path, sizeof (zc.zc_value)); 3276 verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, 3277 &zc.zc_guid) == 0); 3278 3279 (void) ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_VDEV_SETPATH, &zc); 3280 } 3281 3282 /* 3283 * Given a vdev, return the name to display in iostat. If the vdev has a path, 3284 * we use that, stripping off any leading "/dev/dsk/"; if not, we use the type. 3285 * We also check if this is a whole disk, in which case we strip off the 3286 * trailing 's0' slice name. 3287 * 3288 * This routine is also responsible for identifying when disks have been 3289 * reconfigured in a new location. The kernel will have opened the device by 3290 * devid, but the path will still refer to the old location. To catch this, we 3291 * first do a path -> devid translation (which is fast for the common case). If 3292 * the devid matches, we're done. If not, we do a reverse devid -> path 3293 * translation and issue the appropriate ioctl() to update the path of the vdev. 3294 * If 'zhp' is NULL, then this is an exported pool, and we don't need to do any 3295 * of these checks. 3296 */ 3297 char * 3298 zpool_vdev_name(libzfs_handle_t *hdl, zpool_handle_t *zhp, nvlist_t *nv, 3299 boolean_t verbose) 3300 { 3301 char *path, *devid; 3302 uint64_t value; 3303 char buf[64]; 3304 vdev_stat_t *vs; 3305 uint_t vsc; 3306 3307 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 3308 &value) == 0) { 3309 verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, 3310 &value) == 0); 3311 (void) snprintf(buf, sizeof (buf), "%llu", 3312 (u_longlong_t)value); 3313 path = buf; 3314 } else if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) == 0) { 3315 3316 /* 3317 * If the device is dead (faulted, offline, etc) then don't 3318 * bother opening it. Otherwise we may be forcing the user to 3319 * open a misbehaving device, which can have undesirable 3320 * effects. 3321 */ 3322 if ((nvlist_lookup_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS, 3323 (uint64_t **)&vs, &vsc) != 0 || 3324 vs->vs_state >= VDEV_STATE_DEGRADED) && 3325 zhp != NULL && 3326 nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &devid) == 0) { 3327 /* 3328 * Determine if the current path is correct. 3329 */ 3330 char *newdevid = path_to_devid(path); 3331 3332 if (newdevid == NULL || 3333 strcmp(devid, newdevid) != 0) { 3334 char *newpath; 3335 3336 if ((newpath = devid_to_path(devid)) != NULL) { 3337 /* 3338 * Update the path appropriately. 3339 */ 3340 set_path(zhp, nv, newpath); 3341 if (nvlist_add_string(nv, 3342 ZPOOL_CONFIG_PATH, newpath) == 0) 3343 verify(nvlist_lookup_string(nv, 3344 ZPOOL_CONFIG_PATH, 3345 &path) == 0); 3346 free(newpath); 3347 } 3348 } 3349 3350 if (newdevid) 3351 devid_str_free(newdevid); 3352 } 3353 3354 if (strncmp(path, "/dev/dsk/", 9) == 0) 3355 path += 9; 3356 3357 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, 3358 &value) == 0 && value) { 3359 int pathlen = strlen(path); 3360 char *tmp = zfs_strdup(hdl, path); 3361 3362 /* 3363 * If it starts with c#, and ends with "s0", chop 3364 * the "s0" off, or if it ends with "s0/old", remove 3365 * the "s0" from the middle. 3366 */ 3367 if (CTD_CHECK(tmp)) { 3368 if (strcmp(&tmp[pathlen - 2], "s0") == 0) { 3369 tmp[pathlen - 2] = '\0'; 3370 } else if (pathlen > 6 && 3371 strcmp(&tmp[pathlen - 6], "s0/old") == 0) { 3372 (void) strcpy(&tmp[pathlen - 6], 3373 "/old"); 3374 } 3375 } 3376 return (tmp); 3377 } 3378 } else { 3379 verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &path) == 0); 3380 3381 /* 3382 * If it's a raidz device, we need to stick in the parity level. 3383 */ 3384 if (strcmp(path, VDEV_TYPE_RAIDZ) == 0) { 3385 verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, 3386 &value) == 0); 3387 (void) snprintf(buf, sizeof (buf), "%s%llu", path, 3388 (u_longlong_t)value); 3389 path = buf; 3390 } 3391 3392 /* 3393 * We identify each top-level vdev by using a <type-id> 3394 * naming convention. 3395 */ 3396 if (verbose) { 3397 uint64_t id; 3398 3399 verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, 3400 &id) == 0); 3401 (void) snprintf(buf, sizeof (buf), "%s-%llu", path, 3402 (u_longlong_t)id); 3403 path = buf; 3404 } 3405 } 3406 3407 return (zfs_strdup(hdl, path)); 3408 } 3409 3410 static int 3411 zbookmark_mem_compare(const void *a, const void *b) 3412 { 3413 return (memcmp(a, b, sizeof (zbookmark_phys_t))); 3414 } 3415 3416 /* 3417 * Retrieve the persistent error log, uniquify the members, and return to the 3418 * caller. 3419 */ 3420 int 3421 zpool_get_errlog(zpool_handle_t *zhp, nvlist_t **nverrlistp) 3422 { 3423 zfs_cmd_t zc = { 0 }; 3424 uint64_t count; 3425 zbookmark_phys_t *zb = NULL; 3426 int i; 3427 3428 /* 3429 * Retrieve the raw error list from the kernel. If the number of errors 3430 * has increased, allocate more space and continue until we get the 3431 * entire list. 3432 */ 3433 verify(nvlist_lookup_uint64(zhp->zpool_config, ZPOOL_CONFIG_ERRCOUNT, 3434 &count) == 0); 3435 if (count == 0) 3436 return (0); 3437 if ((zc.zc_nvlist_dst = (uintptr_t)zfs_alloc(zhp->zpool_hdl, 3438 count * sizeof (zbookmark_phys_t))) == (uintptr_t)NULL) 3439 return (-1); 3440 zc.zc_nvlist_dst_size = count; 3441 (void) strcpy(zc.zc_name, zhp->zpool_name); 3442 for (;;) { 3443 if (ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_ERROR_LOG, 3444 &zc) != 0) { 3445 free((void *)(uintptr_t)zc.zc_nvlist_dst); 3446 if (errno == ENOMEM) { 3447 void *dst; 3448 3449 count = zc.zc_nvlist_dst_size; 3450 dst = zfs_alloc(zhp->zpool_hdl, count * 3451 sizeof (zbookmark_phys_t)); 3452 if (dst == NULL) 3453 return (-1); 3454 zc.zc_nvlist_dst = (uintptr_t)dst; 3455 } else { 3456 return (-1); 3457 } 3458 } else { 3459 break; 3460 } 3461 } 3462 3463 /* 3464 * Sort the resulting bookmarks. This is a little confusing due to the 3465 * implementation of ZFS_IOC_ERROR_LOG. The bookmarks are copied last 3466 * to first, and 'zc_nvlist_dst_size' indicates the number of boomarks 3467 * _not_ copied as part of the process. So we point the start of our 3468 * array appropriate and decrement the total number of elements. 3469 */ 3470 zb = ((zbookmark_phys_t *)(uintptr_t)zc.zc_nvlist_dst) + 3471 zc.zc_nvlist_dst_size; 3472 count -= zc.zc_nvlist_dst_size; 3473 3474 qsort(zb, count, sizeof (zbookmark_phys_t), zbookmark_mem_compare); 3475 3476 verify(nvlist_alloc(nverrlistp, 0, KM_SLEEP) == 0); 3477 3478 /* 3479 * Fill in the nverrlistp with nvlist's of dataset and object numbers. 3480 */ 3481 for (i = 0; i < count; i++) { 3482 nvlist_t *nv; 3483 3484 /* ignoring zb_blkid and zb_level for now */ 3485 if (i > 0 && zb[i-1].zb_objset == zb[i].zb_objset && 3486 zb[i-1].zb_object == zb[i].zb_object) 3487 continue; 3488 3489 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) != 0) 3490 goto nomem; 3491 if (nvlist_add_uint64(nv, ZPOOL_ERR_DATASET, 3492 zb[i].zb_objset) != 0) { 3493 nvlist_free(nv); 3494 goto nomem; 3495 } 3496 if (nvlist_add_uint64(nv, ZPOOL_ERR_OBJECT, 3497 zb[i].zb_object) != 0) { 3498 nvlist_free(nv); 3499 goto nomem; 3500 } 3501 if (nvlist_add_nvlist(*nverrlistp, "ejk", nv) != 0) { 3502 nvlist_free(nv); 3503 goto nomem; 3504 } 3505 nvlist_free(nv); 3506 } 3507 3508 free((void *)(uintptr_t)zc.zc_nvlist_dst); 3509 return (0); 3510 3511 nomem: 3512 free((void *)(uintptr_t)zc.zc_nvlist_dst); 3513 return (no_memory(zhp->zpool_hdl)); 3514 } 3515 3516 /* 3517 * Upgrade a ZFS pool to the latest on-disk version. 3518 */ 3519 int 3520 zpool_upgrade(zpool_handle_t *zhp, uint64_t new_version) 3521 { 3522 zfs_cmd_t zc = { 0 }; 3523 libzfs_handle_t *hdl = zhp->zpool_hdl; 3524 3525 (void) strcpy(zc.zc_name, zhp->zpool_name); 3526 zc.zc_cookie = new_version; 3527 3528 if (zfs_ioctl(hdl, ZFS_IOC_POOL_UPGRADE, &zc) != 0) 3529 return (zpool_standard_error_fmt(hdl, errno, 3530 dgettext(TEXT_DOMAIN, "cannot upgrade '%s'"), 3531 zhp->zpool_name)); 3532 return (0); 3533 } 3534 3535 void 3536 zfs_save_arguments(int argc, char **argv, char *string, int len) 3537 { 3538 (void) strlcpy(string, basename(argv[0]), len); 3539 for (int i = 1; i < argc; i++) { 3540 (void) strlcat(string, " ", len); 3541 (void) strlcat(string, argv[i], len); 3542 } 3543 } 3544 3545 int 3546 zpool_log_history(libzfs_handle_t *hdl, const char *message) 3547 { 3548 zfs_cmd_t zc = { 0 }; 3549 nvlist_t *args; 3550 int err; 3551 3552 args = fnvlist_alloc(); 3553 fnvlist_add_string(args, "message", message); 3554 err = zcmd_write_src_nvlist(hdl, &zc, args); 3555 if (err == 0) 3556 err = ioctl(hdl->libzfs_fd, ZFS_IOC_LOG_HISTORY, &zc); 3557 nvlist_free(args); 3558 zcmd_free_nvlists(&zc); 3559 return (err); 3560 } 3561 3562 /* 3563 * Perform ioctl to get some command history of a pool. 3564 * 3565 * 'buf' is the buffer to fill up to 'len' bytes. 'off' is the 3566 * logical offset of the history buffer to start reading from. 3567 * 3568 * Upon return, 'off' is the next logical offset to read from and 3569 * 'len' is the actual amount of bytes read into 'buf'. 3570 */ 3571 static int 3572 get_history(zpool_handle_t *zhp, char *buf, uint64_t *off, uint64_t *len) 3573 { 3574 zfs_cmd_t zc = { 0 }; 3575 libzfs_handle_t *hdl = zhp->zpool_hdl; 3576 3577 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 3578 3579 zc.zc_history = (uint64_t)(uintptr_t)buf; 3580 zc.zc_history_len = *len; 3581 zc.zc_history_offset = *off; 3582 3583 if (ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_GET_HISTORY, &zc) != 0) { 3584 switch (errno) { 3585 case EPERM: 3586 return (zfs_error_fmt(hdl, EZFS_PERM, 3587 dgettext(TEXT_DOMAIN, 3588 "cannot show history for pool '%s'"), 3589 zhp->zpool_name)); 3590 case ENOENT: 3591 return (zfs_error_fmt(hdl, EZFS_NOHISTORY, 3592 dgettext(TEXT_DOMAIN, "cannot get history for pool " 3593 "'%s'"), zhp->zpool_name)); 3594 case ENOTSUP: 3595 return (zfs_error_fmt(hdl, EZFS_BADVERSION, 3596 dgettext(TEXT_DOMAIN, "cannot get history for pool " 3597 "'%s', pool must be upgraded"), zhp->zpool_name)); 3598 default: 3599 return (zpool_standard_error_fmt(hdl, errno, 3600 dgettext(TEXT_DOMAIN, 3601 "cannot get history for '%s'"), zhp->zpool_name)); 3602 } 3603 } 3604 3605 *len = zc.zc_history_len; 3606 *off = zc.zc_history_offset; 3607 3608 return (0); 3609 } 3610 3611 /* 3612 * Process the buffer of nvlists, unpacking and storing each nvlist record 3613 * into 'records'. 'leftover' is set to the number of bytes that weren't 3614 * processed as there wasn't a complete record. 3615 */ 3616 int 3617 zpool_history_unpack(char *buf, uint64_t bytes_read, uint64_t *leftover, 3618 nvlist_t ***records, uint_t *numrecords) 3619 { 3620 uint64_t reclen; 3621 nvlist_t *nv; 3622 int i; 3623 3624 while (bytes_read > sizeof (reclen)) { 3625 3626 /* get length of packed record (stored as little endian) */ 3627 for (i = 0, reclen = 0; i < sizeof (reclen); i++) 3628 reclen += (uint64_t)(((uchar_t *)buf)[i]) << (8*i); 3629 3630 if (bytes_read < sizeof (reclen) + reclen) 3631 break; 3632 3633 /* unpack record */ 3634 if (nvlist_unpack(buf + sizeof (reclen), reclen, &nv, 0) != 0) 3635 return (ENOMEM); 3636 bytes_read -= sizeof (reclen) + reclen; 3637 buf += sizeof (reclen) + reclen; 3638 3639 /* add record to nvlist array */ 3640 (*numrecords)++; 3641 if (ISP2(*numrecords + 1)) { 3642 *records = realloc(*records, 3643 *numrecords * 2 * sizeof (nvlist_t *)); 3644 } 3645 (*records)[*numrecords - 1] = nv; 3646 } 3647 3648 *leftover = bytes_read; 3649 return (0); 3650 } 3651 3652 /* 3653 * Retrieve the command history of a pool. 3654 */ 3655 int 3656 zpool_get_history(zpool_handle_t *zhp, nvlist_t **nvhisp) 3657 { 3658 char *buf; 3659 int buflen = 128 * 1024; 3660 uint64_t off = 0; 3661 nvlist_t **records = NULL; 3662 uint_t numrecords = 0; 3663 int err, i; 3664 3665 buf = malloc(buflen); 3666 if (buf == NULL) 3667 return (ENOMEM); 3668 do { 3669 uint64_t bytes_read = buflen; 3670 uint64_t leftover; 3671 3672 if ((err = get_history(zhp, buf, &off, &bytes_read)) != 0) 3673 break; 3674 3675 /* if nothing else was read in, we're at EOF, just return */ 3676 if (!bytes_read) 3677 break; 3678 3679 if ((err = zpool_history_unpack(buf, bytes_read, 3680 &leftover, &records, &numrecords)) != 0) 3681 break; 3682 off -= leftover; 3683 if (leftover == bytes_read) { 3684 /* 3685 * no progress made, because buffer is not big enough 3686 * to hold this record; resize and retry. 3687 */ 3688 buflen *= 2; 3689 free(buf); 3690 buf = malloc(buflen); 3691 if (buf == NULL) 3692 return (ENOMEM); 3693 } 3694 3695 /* CONSTCOND */ 3696 } while (1); 3697 3698 free(buf); 3699 3700 if (!err) { 3701 verify(nvlist_alloc(nvhisp, NV_UNIQUE_NAME, 0) == 0); 3702 verify(nvlist_add_nvlist_array(*nvhisp, ZPOOL_HIST_RECORD, 3703 records, numrecords) == 0); 3704 } 3705 for (i = 0; i < numrecords; i++) 3706 nvlist_free(records[i]); 3707 free(records); 3708 3709 return (err); 3710 } 3711 3712 void 3713 zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj, 3714 char *pathname, size_t len) 3715 { 3716 zfs_cmd_t zc = { 0 }; 3717 boolean_t mounted = B_FALSE; 3718 char *mntpnt = NULL; 3719 char dsname[ZFS_MAX_DATASET_NAME_LEN]; 3720 3721 if (dsobj == 0) { 3722 /* special case for the MOS */ 3723 (void) snprintf(pathname, len, "<metadata>:<0x%llx>", obj); 3724 return; 3725 } 3726 3727 /* get the dataset's name */ 3728 (void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name)); 3729 zc.zc_obj = dsobj; 3730 if (ioctl(zhp->zpool_hdl->libzfs_fd, 3731 ZFS_IOC_DSOBJ_TO_DSNAME, &zc) != 0) { 3732 /* just write out a path of two object numbers */ 3733 (void) snprintf(pathname, len, "<0x%llx>:<0x%llx>", 3734 dsobj, obj); 3735 return; 3736 } 3737 (void) strlcpy(dsname, zc.zc_value, sizeof (dsname)); 3738 3739 /* find out if the dataset is mounted */ 3740 mounted = is_mounted(zhp->zpool_hdl, dsname, &mntpnt); 3741 3742 /* get the corrupted object's path */ 3743 (void) strlcpy(zc.zc_name, dsname, sizeof (zc.zc_name)); 3744 zc.zc_obj = obj; 3745 if (ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_OBJ_TO_PATH, 3746 &zc) == 0) { 3747 if (mounted) { 3748 (void) snprintf(pathname, len, "%s%s", mntpnt, 3749 zc.zc_value); 3750 } else { 3751 (void) snprintf(pathname, len, "%s:%s", 3752 dsname, zc.zc_value); 3753 } 3754 } else { 3755 (void) snprintf(pathname, len, "%s:<0x%llx>", dsname, obj); 3756 } 3757 free(mntpnt); 3758 } 3759 3760 /* 3761 * Read the EFI label from the config, if a label does not exist then 3762 * pass back the error to the caller. If the caller has passed a non-NULL 3763 * diskaddr argument then we set it to the starting address of the EFI 3764 * partition. 3765 */ 3766 static int 3767 read_efi_label(nvlist_t *config, diskaddr_t *sb) 3768 { 3769 char *path; 3770 int fd; 3771 char diskname[MAXPATHLEN]; 3772 int err = -1; 3773 3774 if (nvlist_lookup_string(config, ZPOOL_CONFIG_PATH, &path) != 0) 3775 return (err); 3776 3777 (void) snprintf(diskname, sizeof (diskname), "%s%s", RDISK_ROOT, 3778 strrchr(path, '/')); 3779 if ((fd = open(diskname, O_RDONLY|O_NDELAY)) >= 0) { 3780 struct dk_gpt *vtoc; 3781 3782 if ((err = efi_alloc_and_read(fd, &vtoc)) >= 0) { 3783 if (sb != NULL) 3784 *sb = vtoc->efi_parts[0].p_start; 3785 efi_free(vtoc); 3786 } 3787 (void) close(fd); 3788 } 3789 return (err); 3790 } 3791 3792 /* 3793 * determine where a partition starts on a disk in the current 3794 * configuration 3795 */ 3796 static diskaddr_t 3797 find_start_block(nvlist_t *config) 3798 { 3799 nvlist_t **child; 3800 uint_t c, children; 3801 diskaddr_t sb = MAXOFFSET_T; 3802 uint64_t wholedisk; 3803 3804 if (nvlist_lookup_nvlist_array(config, 3805 ZPOOL_CONFIG_CHILDREN, &child, &children) != 0) { 3806 if (nvlist_lookup_uint64(config, 3807 ZPOOL_CONFIG_WHOLE_DISK, 3808 &wholedisk) != 0 || !wholedisk) { 3809 return (MAXOFFSET_T); 3810 } 3811 if (read_efi_label(config, &sb) < 0) 3812 sb = MAXOFFSET_T; 3813 return (sb); 3814 } 3815 3816 for (c = 0; c < children; c++) { 3817 sb = find_start_block(child[c]); 3818 if (sb != MAXOFFSET_T) { 3819 return (sb); 3820 } 3821 } 3822 return (MAXOFFSET_T); 3823 } 3824 3825 /* 3826 * Label an individual disk. The name provided is the short name, 3827 * stripped of any leading /dev path. 3828 */ 3829 int 3830 zpool_label_disk(libzfs_handle_t *hdl, zpool_handle_t *zhp, char *name) 3831 { 3832 char path[MAXPATHLEN]; 3833 struct dk_gpt *vtoc; 3834 int fd; 3835 size_t resv = EFI_MIN_RESV_SIZE; 3836 uint64_t slice_size; 3837 diskaddr_t start_block; 3838 char errbuf[1024]; 3839 3840 /* prepare an error message just in case */ 3841 (void) snprintf(errbuf, sizeof (errbuf), 3842 dgettext(TEXT_DOMAIN, "cannot label '%s'"), name); 3843 3844 if (zhp) { 3845 nvlist_t *nvroot; 3846 3847 verify(nvlist_lookup_nvlist(zhp->zpool_config, 3848 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3849 3850 if (zhp->zpool_start_block == 0) 3851 start_block = find_start_block(nvroot); 3852 else 3853 start_block = zhp->zpool_start_block; 3854 zhp->zpool_start_block = start_block; 3855 } else { 3856 /* new pool */ 3857 start_block = NEW_START_BLOCK; 3858 } 3859 3860 (void) snprintf(path, sizeof (path), "%s/%s%s", RDISK_ROOT, name, 3861 BACKUP_SLICE); 3862 3863 if ((fd = open(path, O_RDWR | O_NDELAY)) < 0) { 3864 /* 3865 * This shouldn't happen. We've long since verified that this 3866 * is a valid device. 3867 */ 3868 zfs_error_aux(hdl, 3869 dgettext(TEXT_DOMAIN, "unable to open device")); 3870 return (zfs_error(hdl, EZFS_OPENFAILED, errbuf)); 3871 } 3872 3873 if (efi_alloc_and_init(fd, EFI_NUMPAR, &vtoc) != 0) { 3874 /* 3875 * The only way this can fail is if we run out of memory, or we 3876 * were unable to read the disk's capacity 3877 */ 3878 if (errno == ENOMEM) 3879 (void) no_memory(hdl); 3880 3881 (void) close(fd); 3882 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3883 "unable to read disk capacity"), name); 3884 3885 return (zfs_error(hdl, EZFS_NOCAP, errbuf)); 3886 } 3887 3888 slice_size = vtoc->efi_last_u_lba + 1; 3889 slice_size -= EFI_MIN_RESV_SIZE; 3890 if (start_block == MAXOFFSET_T) 3891 start_block = NEW_START_BLOCK; 3892 slice_size -= start_block; 3893 3894 vtoc->efi_parts[0].p_start = start_block; 3895 vtoc->efi_parts[0].p_size = slice_size; 3896 3897 /* 3898 * Why we use V_USR: V_BACKUP confuses users, and is considered 3899 * disposable by some EFI utilities (since EFI doesn't have a backup 3900 * slice). V_UNASSIGNED is supposed to be used only for zero size 3901 * partitions, and efi_write() will fail if we use it. V_ROOT, V_BOOT, 3902 * etc. were all pretty specific. V_USR is as close to reality as we 3903 * can get, in the absence of V_OTHER. 3904 */ 3905 vtoc->efi_parts[0].p_tag = V_USR; 3906 (void) strcpy(vtoc->efi_parts[0].p_name, "zfs"); 3907 3908 vtoc->efi_parts[8].p_start = slice_size + start_block; 3909 vtoc->efi_parts[8].p_size = resv; 3910 vtoc->efi_parts[8].p_tag = V_RESERVED; 3911 3912 if (efi_write(fd, vtoc) != 0) { 3913 /* 3914 * Some block drivers (like pcata) may not support EFI 3915 * GPT labels. Print out a helpful error message dir- 3916 * ecting the user to manually label the disk and give 3917 * a specific slice. 3918 */ 3919 (void) close(fd); 3920 efi_free(vtoc); 3921 3922 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3923 "try using fdisk(1M) and then provide a specific slice")); 3924 return (zfs_error(hdl, EZFS_LABELFAILED, errbuf)); 3925 } 3926 3927 (void) close(fd); 3928 efi_free(vtoc); 3929 return (0); 3930 } 3931 3932 static boolean_t 3933 supported_dump_vdev_type(libzfs_handle_t *hdl, nvlist_t *config, char *errbuf) 3934 { 3935 char *type; 3936 nvlist_t **child; 3937 uint_t children, c; 3938 3939 verify(nvlist_lookup_string(config, ZPOOL_CONFIG_TYPE, &type) == 0); 3940 if (strcmp(type, VDEV_TYPE_FILE) == 0 || 3941 strcmp(type, VDEV_TYPE_HOLE) == 0 || 3942 strcmp(type, VDEV_TYPE_MISSING) == 0) { 3943 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3944 "vdev type '%s' is not supported"), type); 3945 (void) zfs_error(hdl, EZFS_VDEVNOTSUP, errbuf); 3946 return (B_FALSE); 3947 } 3948 if (nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_CHILDREN, 3949 &child, &children) == 0) { 3950 for (c = 0; c < children; c++) { 3951 if (!supported_dump_vdev_type(hdl, child[c], errbuf)) 3952 return (B_FALSE); 3953 } 3954 } 3955 return (B_TRUE); 3956 } 3957 3958 /* 3959 * Check if this zvol is allowable for use as a dump device; zero if 3960 * it is, > 0 if it isn't, < 0 if it isn't a zvol. 3961 * 3962 * Allowable storage configurations include mirrors, all raidz variants, and 3963 * pools with log, cache, and spare devices. Pools which are backed by files or 3964 * have missing/hole vdevs are not suitable. 3965 */ 3966 int 3967 zvol_check_dump_config(char *arg) 3968 { 3969 zpool_handle_t *zhp = NULL; 3970 nvlist_t *config, *nvroot; 3971 char *p, *volname; 3972 nvlist_t **top; 3973 uint_t toplevels; 3974 libzfs_handle_t *hdl; 3975 char errbuf[1024]; 3976 char poolname[ZFS_MAX_DATASET_NAME_LEN]; 3977 int pathlen = strlen(ZVOL_FULL_DEV_DIR); 3978 int ret = 1; 3979 3980 if (strncmp(arg, ZVOL_FULL_DEV_DIR, pathlen)) { 3981 return (-1); 3982 } 3983 3984 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3985 "dump is not supported on device '%s'"), arg); 3986 3987 if ((hdl = libzfs_init()) == NULL) 3988 return (1); 3989 libzfs_print_on_error(hdl, B_TRUE); 3990 3991 volname = arg + pathlen; 3992 3993 /* check the configuration of the pool */ 3994 if ((p = strchr(volname, '/')) == NULL) { 3995 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3996 "malformed dataset name")); 3997 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 3998 return (1); 3999 } else if (p - volname >= ZFS_MAX_DATASET_NAME_LEN) { 4000 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4001 "dataset name is too long")); 4002 (void) zfs_error(hdl, EZFS_NAMETOOLONG, errbuf); 4003 return (1); 4004 } else { 4005 (void) strncpy(poolname, volname, p - volname); 4006 poolname[p - volname] = '\0'; 4007 } 4008 4009 if ((zhp = zpool_open(hdl, poolname)) == NULL) { 4010 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4011 "could not open pool '%s'"), poolname); 4012 (void) zfs_error(hdl, EZFS_OPENFAILED, errbuf); 4013 goto out; 4014 } 4015 config = zpool_get_config(zhp, NULL); 4016 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4017 &nvroot) != 0) { 4018 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4019 "could not obtain vdev configuration for '%s'"), poolname); 4020 (void) zfs_error(hdl, EZFS_INVALCONFIG, errbuf); 4021 goto out; 4022 } 4023 4024 verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 4025 &top, &toplevels) == 0); 4026 4027 if (!supported_dump_vdev_type(hdl, top[0], errbuf)) { 4028 goto out; 4029 } 4030 ret = 0; 4031 4032 out: 4033 if (zhp) 4034 zpool_close(zhp); 4035 libzfs_fini(hdl); 4036 return (ret); 4037 } 4038