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 Used when iterating over pools (because 971 * the configuration cache may be out of date). 972 */ 973 int 974 zpool_open_silent(libzfs_handle_t *hdl, const char *pool, zpool_handle_t **ret) 975 { 976 zpool_handle_t *zhp; 977 boolean_t missing;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