libzfs_dataset.c revision 305461
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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek <pawel@dawidek.net>. 28 * All rights reserved. 29 * Copyright (c) 2012 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 30 * Copyright (c) 2013 Steven Hartland. All rights reserved. 31 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 32 * Copyright (c) 2014 Integros [integros.com] 33 */ 34 35#include <ctype.h> 36#include <errno.h> 37#include <libintl.h> 38#include <math.h> 39#include <stdio.h> 40#include <stdlib.h> 41#include <strings.h> 42#include <unistd.h> 43#include <stddef.h> 44#include <zone.h> 45#include <fcntl.h> 46#include <sys/mntent.h> 47#include <sys/mount.h> 48#include <priv.h> 49#include <pwd.h> 50#include <grp.h> 51#include <stddef.h> 52#include <idmap.h> 53 54#include <sys/dnode.h> 55#include <sys/spa.h> 56#include <sys/zap.h> 57#include <sys/misc.h> 58#include <libzfs.h> 59 60#include "zfs_namecheck.h" 61#include "zfs_prop.h" 62#include "libzfs_impl.h" 63#include "zfs_deleg.h" 64 65static int userquota_propname_decode(const char *propname, boolean_t zoned, 66 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 67 68/* 69 * Given a single type (not a mask of types), return the type in a human 70 * readable form. 71 */ 72const char * 73zfs_type_to_name(zfs_type_t type) 74{ 75 switch (type) { 76 case ZFS_TYPE_FILESYSTEM: 77 return (dgettext(TEXT_DOMAIN, "filesystem")); 78 case ZFS_TYPE_SNAPSHOT: 79 return (dgettext(TEXT_DOMAIN, "snapshot")); 80 case ZFS_TYPE_VOLUME: 81 return (dgettext(TEXT_DOMAIN, "volume")); 82 } 83 84 return (NULL); 85} 86 87/* 88 * Given a path and mask of ZFS types, return a string describing this dataset. 89 * This is used when we fail to open a dataset and we cannot get an exact type. 90 * We guess what the type would have been based on the path and the mask of 91 * acceptable types. 92 */ 93static const char * 94path_to_str(const char *path, int types) 95{ 96 /* 97 * When given a single type, always report the exact type. 98 */ 99 if (types == ZFS_TYPE_SNAPSHOT) 100 return (dgettext(TEXT_DOMAIN, "snapshot")); 101 if (types == ZFS_TYPE_FILESYSTEM) 102 return (dgettext(TEXT_DOMAIN, "filesystem")); 103 if (types == ZFS_TYPE_VOLUME) 104 return (dgettext(TEXT_DOMAIN, "volume")); 105 106 /* 107 * The user is requesting more than one type of dataset. If this is the 108 * case, consult the path itself. If we're looking for a snapshot, and 109 * a '@' is found, then report it as "snapshot". Otherwise, remove the 110 * snapshot attribute and try again. 111 */ 112 if (types & ZFS_TYPE_SNAPSHOT) { 113 if (strchr(path, '@') != NULL) 114 return (dgettext(TEXT_DOMAIN, "snapshot")); 115 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT)); 116 } 117 118 /* 119 * The user has requested either filesystems or volumes. 120 * We have no way of knowing a priori what type this would be, so always 121 * report it as "filesystem" or "volume", our two primitive types. 122 */ 123 if (types & ZFS_TYPE_FILESYSTEM) 124 return (dgettext(TEXT_DOMAIN, "filesystem")); 125 126 assert(types & ZFS_TYPE_VOLUME); 127 return (dgettext(TEXT_DOMAIN, "volume")); 128} 129 130/* 131 * Validate a ZFS path. This is used even before trying to open the dataset, to 132 * provide a more meaningful error message. We call zfs_error_aux() to 133 * explain exactly why the name was not valid. 134 */ 135int 136zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 137 boolean_t modifying) 138{ 139 namecheck_err_t why; 140 char what; 141 142 (void) zfs_prop_get_table(); 143 if (dataset_namecheck(path, &why, &what) != 0) { 144 if (hdl != NULL) { 145 switch (why) { 146 case NAME_ERR_TOOLONG: 147 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 148 "name is too long")); 149 break; 150 151 case NAME_ERR_LEADING_SLASH: 152 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 153 "leading slash in name")); 154 break; 155 156 case NAME_ERR_EMPTY_COMPONENT: 157 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 158 "empty component in name")); 159 break; 160 161 case NAME_ERR_TRAILING_SLASH: 162 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 163 "trailing slash in name")); 164 break; 165 166 case NAME_ERR_INVALCHAR: 167 zfs_error_aux(hdl, 168 dgettext(TEXT_DOMAIN, "invalid character " 169 "'%c' in name"), what); 170 break; 171 172 case NAME_ERR_MULTIPLE_AT: 173 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 174 "multiple '@' delimiters in name")); 175 break; 176 177 case NAME_ERR_NOLETTER: 178 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 179 "pool doesn't begin with a letter")); 180 break; 181 182 case NAME_ERR_RESERVED: 183 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 184 "name is reserved")); 185 break; 186 187 case NAME_ERR_DISKLIKE: 188 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 189 "reserved disk name")); 190 break; 191 } 192 } 193 194 return (0); 195 } 196 197 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 198 if (hdl != NULL) 199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 200 "snapshot delimiter '@' in filesystem name")); 201 return (0); 202 } 203 204 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 205 if (hdl != NULL) 206 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 207 "missing '@' delimiter in snapshot name")); 208 return (0); 209 } 210 211 if (modifying && strchr(path, '%') != NULL) { 212 if (hdl != NULL) 213 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 214 "invalid character %c in name"), '%'); 215 return (0); 216 } 217 218 return (-1); 219} 220 221int 222zfs_name_valid(const char *name, zfs_type_t type) 223{ 224 if (type == ZFS_TYPE_POOL) 225 return (zpool_name_valid(NULL, B_FALSE, name)); 226 return (zfs_validate_name(NULL, name, type, B_FALSE)); 227} 228 229/* 230 * This function takes the raw DSL properties, and filters out the user-defined 231 * properties into a separate nvlist. 232 */ 233static nvlist_t * 234process_user_props(zfs_handle_t *zhp, nvlist_t *props) 235{ 236 libzfs_handle_t *hdl = zhp->zfs_hdl; 237 nvpair_t *elem; 238 nvlist_t *propval; 239 nvlist_t *nvl; 240 241 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 242 (void) no_memory(hdl); 243 return (NULL); 244 } 245 246 elem = NULL; 247 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 248 if (!zfs_prop_user(nvpair_name(elem))) 249 continue; 250 251 verify(nvpair_value_nvlist(elem, &propval) == 0); 252 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 253 nvlist_free(nvl); 254 (void) no_memory(hdl); 255 return (NULL); 256 } 257 } 258 259 return (nvl); 260} 261 262static zpool_handle_t * 263zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 264{ 265 libzfs_handle_t *hdl = zhp->zfs_hdl; 266 zpool_handle_t *zph; 267 268 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 269 if (hdl->libzfs_pool_handles != NULL) 270 zph->zpool_next = hdl->libzfs_pool_handles; 271 hdl->libzfs_pool_handles = zph; 272 } 273 return (zph); 274} 275 276static zpool_handle_t * 277zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 278{ 279 libzfs_handle_t *hdl = zhp->zfs_hdl; 280 zpool_handle_t *zph = hdl->libzfs_pool_handles; 281 282 while ((zph != NULL) && 283 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 284 zph = zph->zpool_next; 285 return (zph); 286} 287 288/* 289 * Returns a handle to the pool that contains the provided dataset. 290 * If a handle to that pool already exists then that handle is returned. 291 * Otherwise, a new handle is created and added to the list of handles. 292 */ 293static zpool_handle_t * 294zpool_handle(zfs_handle_t *zhp) 295{ 296 char *pool_name; 297 int len; 298 zpool_handle_t *zph; 299 300 len = strcspn(zhp->zfs_name, "/@#") + 1; 301 pool_name = zfs_alloc(zhp->zfs_hdl, len); 302 (void) strlcpy(pool_name, zhp->zfs_name, len); 303 304 zph = zpool_find_handle(zhp, pool_name, len); 305 if (zph == NULL) 306 zph = zpool_add_handle(zhp, pool_name); 307 308 free(pool_name); 309 return (zph); 310} 311 312void 313zpool_free_handles(libzfs_handle_t *hdl) 314{ 315 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 316 317 while (zph != NULL) { 318 next = zph->zpool_next; 319 zpool_close(zph); 320 zph = next; 321 } 322 hdl->libzfs_pool_handles = NULL; 323} 324 325/* 326 * Utility function to gather stats (objset and zpl) for the given object. 327 */ 328static int 329get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 330{ 331 libzfs_handle_t *hdl = zhp->zfs_hdl; 332 333 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 334 335 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { 336 if (errno == ENOMEM) { 337 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 338 return (-1); 339 } 340 } else { 341 return (-1); 342 } 343 } 344 return (0); 345} 346 347/* 348 * Utility function to get the received properties of the given object. 349 */ 350static int 351get_recvd_props_ioctl(zfs_handle_t *zhp) 352{ 353 libzfs_handle_t *hdl = zhp->zfs_hdl; 354 nvlist_t *recvdprops; 355 zfs_cmd_t zc = { 0 }; 356 int err; 357 358 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 359 return (-1); 360 361 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 362 363 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 364 if (errno == ENOMEM) { 365 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 366 return (-1); 367 } 368 } else { 369 zcmd_free_nvlists(&zc); 370 return (-1); 371 } 372 } 373 374 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 375 zcmd_free_nvlists(&zc); 376 if (err != 0) 377 return (-1); 378 379 nvlist_free(zhp->zfs_recvd_props); 380 zhp->zfs_recvd_props = recvdprops; 381 382 return (0); 383} 384 385static int 386put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 387{ 388 nvlist_t *allprops, *userprops; 389 390 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 391 392 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 393 return (-1); 394 } 395 396 /* 397 * XXX Why do we store the user props separately, in addition to 398 * storing them in zfs_props? 399 */ 400 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 401 nvlist_free(allprops); 402 return (-1); 403 } 404 405 nvlist_free(zhp->zfs_props); 406 nvlist_free(zhp->zfs_user_props); 407 408 zhp->zfs_props = allprops; 409 zhp->zfs_user_props = userprops; 410 411 return (0); 412} 413 414static int 415get_stats(zfs_handle_t *zhp) 416{ 417 int rc = 0; 418 zfs_cmd_t zc = { 0 }; 419 420 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 421 return (-1); 422 if (get_stats_ioctl(zhp, &zc) != 0) 423 rc = -1; 424 else if (put_stats_zhdl(zhp, &zc) != 0) 425 rc = -1; 426 zcmd_free_nvlists(&zc); 427 return (rc); 428} 429 430/* 431 * Refresh the properties currently stored in the handle. 432 */ 433void 434zfs_refresh_properties(zfs_handle_t *zhp) 435{ 436 (void) get_stats(zhp); 437} 438 439/* 440 * Makes a handle from the given dataset name. Used by zfs_open() and 441 * zfs_iter_* to create child handles on the fly. 442 */ 443static int 444make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 445{ 446 if (put_stats_zhdl(zhp, zc) != 0) 447 return (-1); 448 449 /* 450 * We've managed to open the dataset and gather statistics. Determine 451 * the high-level type. 452 */ 453 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 454 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 455 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 456 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 457 else 458 abort(); 459 460 if (zhp->zfs_dmustats.dds_is_snapshot) 461 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 462 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 463 zhp->zfs_type = ZFS_TYPE_VOLUME; 464 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 465 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 466 else 467 abort(); /* we should never see any other types */ 468 469 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 470 return (-1); 471 472 return (0); 473} 474 475zfs_handle_t * 476make_dataset_handle(libzfs_handle_t *hdl, const char *path) 477{ 478 zfs_cmd_t zc = { 0 }; 479 480 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 481 482 if (zhp == NULL) 483 return (NULL); 484 485 zhp->zfs_hdl = hdl; 486 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 487 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 488 free(zhp); 489 return (NULL); 490 } 491 if (get_stats_ioctl(zhp, &zc) == -1) { 492 zcmd_free_nvlists(&zc); 493 free(zhp); 494 return (NULL); 495 } 496 if (make_dataset_handle_common(zhp, &zc) == -1) { 497 free(zhp); 498 zhp = NULL; 499 } 500 zcmd_free_nvlists(&zc); 501 return (zhp); 502} 503 504zfs_handle_t * 505make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 506{ 507 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 508 509 if (zhp == NULL) 510 return (NULL); 511 512 zhp->zfs_hdl = hdl; 513 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 514 if (make_dataset_handle_common(zhp, zc) == -1) { 515 free(zhp); 516 return (NULL); 517 } 518 return (zhp); 519} 520 521zfs_handle_t * 522make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 523{ 524 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 525 526 if (zhp == NULL) 527 return (NULL); 528 529 zhp->zfs_hdl = pzhp->zfs_hdl; 530 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 531 zhp->zfs_head_type = pzhp->zfs_type; 532 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 533 zhp->zpool_hdl = zpool_handle(zhp); 534 return (zhp); 535} 536 537zfs_handle_t * 538zfs_handle_dup(zfs_handle_t *zhp_orig) 539{ 540 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 541 542 if (zhp == NULL) 543 return (NULL); 544 545 zhp->zfs_hdl = zhp_orig->zfs_hdl; 546 zhp->zpool_hdl = zhp_orig->zpool_hdl; 547 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 548 sizeof (zhp->zfs_name)); 549 zhp->zfs_type = zhp_orig->zfs_type; 550 zhp->zfs_head_type = zhp_orig->zfs_head_type; 551 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 552 if (zhp_orig->zfs_props != NULL) { 553 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 554 (void) no_memory(zhp->zfs_hdl); 555 zfs_close(zhp); 556 return (NULL); 557 } 558 } 559 if (zhp_orig->zfs_user_props != NULL) { 560 if (nvlist_dup(zhp_orig->zfs_user_props, 561 &zhp->zfs_user_props, 0) != 0) { 562 (void) no_memory(zhp->zfs_hdl); 563 zfs_close(zhp); 564 return (NULL); 565 } 566 } 567 if (zhp_orig->zfs_recvd_props != NULL) { 568 if (nvlist_dup(zhp_orig->zfs_recvd_props, 569 &zhp->zfs_recvd_props, 0)) { 570 (void) no_memory(zhp->zfs_hdl); 571 zfs_close(zhp); 572 return (NULL); 573 } 574 } 575 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 576 if (zhp_orig->zfs_mntopts != NULL) { 577 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 578 zhp_orig->zfs_mntopts); 579 } 580 zhp->zfs_props_table = zhp_orig->zfs_props_table; 581 return (zhp); 582} 583 584boolean_t 585zfs_bookmark_exists(const char *path) 586{ 587 nvlist_t *bmarks; 588 nvlist_t *props; 589 char fsname[ZFS_MAXNAMELEN]; 590 char *bmark_name; 591 char *pound; 592 int err; 593 boolean_t rv; 594 595 596 (void) strlcpy(fsname, path, sizeof (fsname)); 597 pound = strchr(fsname, '#'); 598 if (pound == NULL) 599 return (B_FALSE); 600 601 *pound = '\0'; 602 bmark_name = pound + 1; 603 props = fnvlist_alloc(); 604 err = lzc_get_bookmarks(fsname, props, &bmarks); 605 nvlist_free(props); 606 if (err != 0) { 607 nvlist_free(bmarks); 608 return (B_FALSE); 609 } 610 611 rv = nvlist_exists(bmarks, bmark_name); 612 nvlist_free(bmarks); 613 return (rv); 614} 615 616zfs_handle_t * 617make_bookmark_handle(zfs_handle_t *parent, const char *path, 618 nvlist_t *bmark_props) 619{ 620 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 621 622 if (zhp == NULL) 623 return (NULL); 624 625 /* Fill in the name. */ 626 zhp->zfs_hdl = parent->zfs_hdl; 627 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 628 629 /* Set the property lists. */ 630 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 631 free(zhp); 632 return (NULL); 633 } 634 635 /* Set the types. */ 636 zhp->zfs_head_type = parent->zfs_head_type; 637 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 638 639 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 640 nvlist_free(zhp->zfs_props); 641 free(zhp); 642 return (NULL); 643 } 644 645 return (zhp); 646} 647 648/* 649 * Opens the given snapshot, filesystem, or volume. The 'types' 650 * argument is a mask of acceptable types. The function will print an 651 * appropriate error message and return NULL if it can't be opened. 652 */ 653zfs_handle_t * 654zfs_open(libzfs_handle_t *hdl, const char *path, int types) 655{ 656 zfs_handle_t *zhp; 657 char errbuf[1024]; 658 659 (void) snprintf(errbuf, sizeof (errbuf), 660 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 661 662 /* 663 * Validate the name before we even try to open it. 664 */ 665 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) { 666 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 667 "invalid dataset name")); 668 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 669 return (NULL); 670 } 671 672 /* 673 * Try to get stats for the dataset, which will tell us if it exists. 674 */ 675 errno = 0; 676 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 677 (void) zfs_standard_error(hdl, errno, errbuf); 678 return (NULL); 679 } 680 681 if (zhp == NULL) { 682 char *at = strchr(path, '@'); 683 684 if (at != NULL) 685 *at = '\0'; 686 errno = 0; 687 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 688 (void) zfs_standard_error(hdl, errno, errbuf); 689 return (NULL); 690 } 691 if (at != NULL) 692 *at = '@'; 693 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 694 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 695 } 696 697 if (!(types & zhp->zfs_type)) { 698 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 699 zfs_close(zhp); 700 return (NULL); 701 } 702 703 return (zhp); 704} 705 706/* 707 * Release a ZFS handle. Nothing to do but free the associated memory. 708 */ 709void 710zfs_close(zfs_handle_t *zhp) 711{ 712 if (zhp->zfs_mntopts) 713 free(zhp->zfs_mntopts); 714 nvlist_free(zhp->zfs_props); 715 nvlist_free(zhp->zfs_user_props); 716 nvlist_free(zhp->zfs_recvd_props); 717 free(zhp); 718} 719 720typedef struct mnttab_node { 721 struct mnttab mtn_mt; 722 avl_node_t mtn_node; 723} mnttab_node_t; 724 725static int 726libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 727{ 728 const mnttab_node_t *mtn1 = arg1; 729 const mnttab_node_t *mtn2 = arg2; 730 int rv; 731 732 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 733 734 if (rv == 0) 735 return (0); 736 return (rv > 0 ? 1 : -1); 737} 738 739void 740libzfs_mnttab_init(libzfs_handle_t *hdl) 741{ 742 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 743 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 744 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 745} 746 747void 748libzfs_mnttab_update(libzfs_handle_t *hdl) 749{ 750 struct mnttab entry; 751 752 rewind(hdl->libzfs_mnttab); 753 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 754 mnttab_node_t *mtn; 755 756 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 757 continue; 758 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 759 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 760 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 761 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 762 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 763 avl_add(&hdl->libzfs_mnttab_cache, mtn); 764 } 765} 766 767void 768libzfs_mnttab_fini(libzfs_handle_t *hdl) 769{ 770 void *cookie = NULL; 771 mnttab_node_t *mtn; 772 773 while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) { 774 free(mtn->mtn_mt.mnt_special); 775 free(mtn->mtn_mt.mnt_mountp); 776 free(mtn->mtn_mt.mnt_fstype); 777 free(mtn->mtn_mt.mnt_mntopts); 778 free(mtn); 779 } 780 avl_destroy(&hdl->libzfs_mnttab_cache); 781} 782 783void 784libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 785{ 786 hdl->libzfs_mnttab_enable = enable; 787} 788 789int 790libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 791 struct mnttab *entry) 792{ 793 mnttab_node_t find; 794 mnttab_node_t *mtn; 795 796 if (!hdl->libzfs_mnttab_enable) { 797 struct mnttab srch = { 0 }; 798 799 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 800 libzfs_mnttab_fini(hdl); 801 rewind(hdl->libzfs_mnttab); 802 srch.mnt_special = (char *)fsname; 803 srch.mnt_fstype = MNTTYPE_ZFS; 804 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 805 return (0); 806 else 807 return (ENOENT); 808 } 809 810 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 811 libzfs_mnttab_update(hdl); 812 813 find.mtn_mt.mnt_special = (char *)fsname; 814 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 815 if (mtn) { 816 *entry = mtn->mtn_mt; 817 return (0); 818 } 819 return (ENOENT); 820} 821 822void 823libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 824 const char *mountp, const char *mntopts) 825{ 826 mnttab_node_t *mtn; 827 828 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 829 return; 830 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 831 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 832 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 833 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 834 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 835 avl_add(&hdl->libzfs_mnttab_cache, mtn); 836} 837 838void 839libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 840{ 841 mnttab_node_t find; 842 mnttab_node_t *ret; 843 844 find.mtn_mt.mnt_special = (char *)fsname; 845 if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) { 846 avl_remove(&hdl->libzfs_mnttab_cache, ret); 847 free(ret->mtn_mt.mnt_special); 848 free(ret->mtn_mt.mnt_mountp); 849 free(ret->mtn_mt.mnt_fstype); 850 free(ret->mtn_mt.mnt_mntopts); 851 free(ret); 852 } 853} 854 855int 856zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 857{ 858 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 859 860 if (zpool_handle == NULL) 861 return (-1); 862 863 *spa_version = zpool_get_prop_int(zpool_handle, 864 ZPOOL_PROP_VERSION, NULL); 865 return (0); 866} 867 868/* 869 * The choice of reservation property depends on the SPA version. 870 */ 871static int 872zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 873{ 874 int spa_version; 875 876 if (zfs_spa_version(zhp, &spa_version) < 0) 877 return (-1); 878 879 if (spa_version >= SPA_VERSION_REFRESERVATION) 880 *resv_prop = ZFS_PROP_REFRESERVATION; 881 else 882 *resv_prop = ZFS_PROP_RESERVATION; 883 884 return (0); 885} 886 887/* 888 * Given an nvlist of properties to set, validates that they are correct, and 889 * parses any numeric properties (index, boolean, etc) if they are specified as 890 * strings. 891 */ 892nvlist_t * 893zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 894 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 895 const char *errbuf) 896{ 897 nvpair_t *elem; 898 uint64_t intval; 899 char *strval; 900 zfs_prop_t prop; 901 nvlist_t *ret; 902 int chosen_normal = -1; 903 int chosen_utf = -1; 904 905 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 906 (void) no_memory(hdl); 907 return (NULL); 908 } 909 910 /* 911 * Make sure this property is valid and applies to this type. 912 */ 913 914 elem = NULL; 915 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 916 const char *propname = nvpair_name(elem); 917 918 prop = zfs_name_to_prop(propname); 919 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 920 /* 921 * This is a user property: make sure it's a 922 * string, and that it's less than ZAP_MAXNAMELEN. 923 */ 924 if (nvpair_type(elem) != DATA_TYPE_STRING) { 925 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 926 "'%s' must be a string"), propname); 927 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 928 goto error; 929 } 930 931 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 932 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 933 "property name '%s' is too long"), 934 propname); 935 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 936 goto error; 937 } 938 939 (void) nvpair_value_string(elem, &strval); 940 if (nvlist_add_string(ret, propname, strval) != 0) { 941 (void) no_memory(hdl); 942 goto error; 943 } 944 continue; 945 } 946 947 /* 948 * Currently, only user properties can be modified on 949 * snapshots. 950 */ 951 if (type == ZFS_TYPE_SNAPSHOT) { 952 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 953 "this property can not be modified for snapshots")); 954 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 955 goto error; 956 } 957 958 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 959 zfs_userquota_prop_t uqtype; 960 char newpropname[128]; 961 char domain[128]; 962 uint64_t rid; 963 uint64_t valary[3]; 964 965 if (userquota_propname_decode(propname, zoned, 966 &uqtype, domain, sizeof (domain), &rid) != 0) { 967 zfs_error_aux(hdl, 968 dgettext(TEXT_DOMAIN, 969 "'%s' has an invalid user/group name"), 970 propname); 971 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 972 goto error; 973 } 974 975 if (uqtype != ZFS_PROP_USERQUOTA && 976 uqtype != ZFS_PROP_GROUPQUOTA) { 977 zfs_error_aux(hdl, 978 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 979 propname); 980 (void) zfs_error(hdl, EZFS_PROPREADONLY, 981 errbuf); 982 goto error; 983 } 984 985 if (nvpair_type(elem) == DATA_TYPE_STRING) { 986 (void) nvpair_value_string(elem, &strval); 987 if (strcmp(strval, "none") == 0) { 988 intval = 0; 989 } else if (zfs_nicestrtonum(hdl, 990 strval, &intval) != 0) { 991 (void) zfs_error(hdl, 992 EZFS_BADPROP, errbuf); 993 goto error; 994 } 995 } else if (nvpair_type(elem) == 996 DATA_TYPE_UINT64) { 997 (void) nvpair_value_uint64(elem, &intval); 998 if (intval == 0) { 999 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1000 "use 'none' to disable " 1001 "userquota/groupquota")); 1002 goto error; 1003 } 1004 } else { 1005 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1006 "'%s' must be a number"), propname); 1007 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1008 goto error; 1009 } 1010 1011 /* 1012 * Encode the prop name as 1013 * userquota@<hex-rid>-domain, to make it easy 1014 * for the kernel to decode. 1015 */ 1016 (void) snprintf(newpropname, sizeof (newpropname), 1017 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 1018 (longlong_t)rid, domain); 1019 valary[0] = uqtype; 1020 valary[1] = rid; 1021 valary[2] = intval; 1022 if (nvlist_add_uint64_array(ret, newpropname, 1023 valary, 3) != 0) { 1024 (void) no_memory(hdl); 1025 goto error; 1026 } 1027 continue; 1028 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 1029 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1030 "'%s' is readonly"), 1031 propname); 1032 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1033 goto error; 1034 } 1035 1036 if (prop == ZPROP_INVAL) { 1037 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1038 "invalid property '%s'"), propname); 1039 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1040 goto error; 1041 } 1042 1043 if (!zfs_prop_valid_for_type(prop, type)) { 1044 zfs_error_aux(hdl, 1045 dgettext(TEXT_DOMAIN, "'%s' does not " 1046 "apply to datasets of this type"), propname); 1047 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1048 goto error; 1049 } 1050 1051 if (zfs_prop_readonly(prop) && 1052 (!zfs_prop_setonce(prop) || zhp != NULL)) { 1053 zfs_error_aux(hdl, 1054 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1055 propname); 1056 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1057 goto error; 1058 } 1059 1060 if (zprop_parse_value(hdl, elem, prop, type, ret, 1061 &strval, &intval, errbuf) != 0) 1062 goto error; 1063 1064 /* 1065 * Perform some additional checks for specific properties. 1066 */ 1067 switch (prop) { 1068 case ZFS_PROP_VERSION: 1069 { 1070 int version; 1071 1072 if (zhp == NULL) 1073 break; 1074 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1075 if (intval < version) { 1076 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1077 "Can not downgrade; already at version %u"), 1078 version); 1079 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1080 goto error; 1081 } 1082 break; 1083 } 1084 1085 case ZFS_PROP_VOLBLOCKSIZE: 1086 case ZFS_PROP_RECORDSIZE: 1087 { 1088 int maxbs = SPA_MAXBLOCKSIZE; 1089 if (zpool_hdl != NULL) { 1090 maxbs = zpool_get_prop_int(zpool_hdl, 1091 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1092 } 1093 /* 1094 * Volumes are limited to a volblocksize of 128KB, 1095 * because they typically service workloads with 1096 * small random writes, which incur a large performance 1097 * penalty with large blocks. 1098 */ 1099 if (prop == ZFS_PROP_VOLBLOCKSIZE) 1100 maxbs = SPA_OLD_MAXBLOCKSIZE; 1101 /* 1102 * The value must be a power of two between 1103 * SPA_MINBLOCKSIZE and maxbs. 1104 */ 1105 if (intval < SPA_MINBLOCKSIZE || 1106 intval > maxbs || !ISP2(intval)) { 1107 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1108 "'%s' must be power of 2 from 512B " 1109 "to %uKB"), propname, maxbs >> 10); 1110 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1111 goto error; 1112 } 1113 break; 1114 } 1115 case ZFS_PROP_MLSLABEL: 1116 { 1117#ifdef illumos 1118 /* 1119 * Verify the mlslabel string and convert to 1120 * internal hex label string. 1121 */ 1122 1123 m_label_t *new_sl; 1124 char *hex = NULL; /* internal label string */ 1125 1126 /* Default value is already OK. */ 1127 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1128 break; 1129 1130 /* Verify the label can be converted to binary form */ 1131 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1132 (str_to_label(strval, &new_sl, MAC_LABEL, 1133 L_NO_CORRECTION, NULL) == -1)) { 1134 goto badlabel; 1135 } 1136 1137 /* Now translate to hex internal label string */ 1138 if (label_to_str(new_sl, &hex, M_INTERNAL, 1139 DEF_NAMES) != 0) { 1140 if (hex) 1141 free(hex); 1142 goto badlabel; 1143 } 1144 m_label_free(new_sl); 1145 1146 /* If string is already in internal form, we're done. */ 1147 if (strcmp(strval, hex) == 0) { 1148 free(hex); 1149 break; 1150 } 1151 1152 /* Replace the label string with the internal form. */ 1153 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1154 DATA_TYPE_STRING); 1155 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1156 hex) == 0); 1157 free(hex); 1158 1159 break; 1160 1161badlabel: 1162 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1163 "invalid mlslabel '%s'"), strval); 1164 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1165 m_label_free(new_sl); /* OK if null */ 1166#else /* !illumos */ 1167 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1168 "mlslabel is not supported on FreeBSD")); 1169 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1170#endif /* illumos */ 1171 goto error; 1172 1173 } 1174 1175 case ZFS_PROP_MOUNTPOINT: 1176 { 1177 namecheck_err_t why; 1178 1179 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1180 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1181 break; 1182 1183 if (mountpoint_namecheck(strval, &why)) { 1184 switch (why) { 1185 case NAME_ERR_LEADING_SLASH: 1186 zfs_error_aux(hdl, 1187 dgettext(TEXT_DOMAIN, 1188 "'%s' must be an absolute path, " 1189 "'none', or 'legacy'"), propname); 1190 break; 1191 case NAME_ERR_TOOLONG: 1192 zfs_error_aux(hdl, 1193 dgettext(TEXT_DOMAIN, 1194 "component of '%s' is too long"), 1195 propname); 1196 break; 1197 } 1198 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1199 goto error; 1200 } 1201 } 1202 1203 /*FALLTHRU*/ 1204 1205 case ZFS_PROP_SHARESMB: 1206 case ZFS_PROP_SHARENFS: 1207 /* 1208 * For the mountpoint and sharenfs or sharesmb 1209 * properties, check if it can be set in a 1210 * global/non-global zone based on 1211 * the zoned property value: 1212 * 1213 * global zone non-global zone 1214 * -------------------------------------------------- 1215 * zoned=on mountpoint (no) mountpoint (yes) 1216 * sharenfs (no) sharenfs (no) 1217 * sharesmb (no) sharesmb (no) 1218 * 1219 * zoned=off mountpoint (yes) N/A 1220 * sharenfs (yes) 1221 * sharesmb (yes) 1222 */ 1223 if (zoned) { 1224 if (getzoneid() == GLOBAL_ZONEID) { 1225 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1226 "'%s' cannot be set on " 1227 "dataset in a non-global zone"), 1228 propname); 1229 (void) zfs_error(hdl, EZFS_ZONED, 1230 errbuf); 1231 goto error; 1232 } else if (prop == ZFS_PROP_SHARENFS || 1233 prop == ZFS_PROP_SHARESMB) { 1234 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1235 "'%s' cannot be set in " 1236 "a non-global zone"), propname); 1237 (void) zfs_error(hdl, EZFS_ZONED, 1238 errbuf); 1239 goto error; 1240 } 1241 } else if (getzoneid() != GLOBAL_ZONEID) { 1242 /* 1243 * If zoned property is 'off', this must be in 1244 * a global zone. If not, something is wrong. 1245 */ 1246 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1247 "'%s' cannot be set while dataset " 1248 "'zoned' property is set"), propname); 1249 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1250 goto error; 1251 } 1252 1253 /* 1254 * At this point, it is legitimate to set the 1255 * property. Now we want to make sure that the 1256 * property value is valid if it is sharenfs. 1257 */ 1258 if ((prop == ZFS_PROP_SHARENFS || 1259 prop == ZFS_PROP_SHARESMB) && 1260 strcmp(strval, "on") != 0 && 1261 strcmp(strval, "off") != 0) { 1262 zfs_share_proto_t proto; 1263 1264 if (prop == ZFS_PROP_SHARESMB) 1265 proto = PROTO_SMB; 1266 else 1267 proto = PROTO_NFS; 1268 1269 /* 1270 * Must be an valid sharing protocol 1271 * option string so init the libshare 1272 * in order to enable the parser and 1273 * then parse the options. We use the 1274 * control API since we don't care about 1275 * the current configuration and don't 1276 * want the overhead of loading it 1277 * until we actually do something. 1278 */ 1279 1280 if (zfs_init_libshare(hdl, 1281 SA_INIT_CONTROL_API) != SA_OK) { 1282 /* 1283 * An error occurred so we can't do 1284 * anything 1285 */ 1286 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1287 "'%s' cannot be set: problem " 1288 "in share initialization"), 1289 propname); 1290 (void) zfs_error(hdl, EZFS_BADPROP, 1291 errbuf); 1292 goto error; 1293 } 1294 1295 if (zfs_parse_options(strval, proto) != SA_OK) { 1296 /* 1297 * There was an error in parsing so 1298 * deal with it by issuing an error 1299 * message and leaving after 1300 * uninitializing the the libshare 1301 * interface. 1302 */ 1303 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1304 "'%s' cannot be set to invalid " 1305 "options"), propname); 1306 (void) zfs_error(hdl, EZFS_BADPROP, 1307 errbuf); 1308 zfs_uninit_libshare(hdl); 1309 goto error; 1310 } 1311 zfs_uninit_libshare(hdl); 1312 } 1313 1314 break; 1315 case ZFS_PROP_UTF8ONLY: 1316 chosen_utf = (int)intval; 1317 break; 1318 case ZFS_PROP_NORMALIZE: 1319 chosen_normal = (int)intval; 1320 break; 1321 } 1322 1323 /* 1324 * For changes to existing volumes, we have some additional 1325 * checks to enforce. 1326 */ 1327 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1328 uint64_t volsize = zfs_prop_get_int(zhp, 1329 ZFS_PROP_VOLSIZE); 1330 uint64_t blocksize = zfs_prop_get_int(zhp, 1331 ZFS_PROP_VOLBLOCKSIZE); 1332 char buf[64]; 1333 1334 switch (prop) { 1335 case ZFS_PROP_RESERVATION: 1336 case ZFS_PROP_REFRESERVATION: 1337 if (intval > volsize) { 1338 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1339 "'%s' is greater than current " 1340 "volume size"), propname); 1341 (void) zfs_error(hdl, EZFS_BADPROP, 1342 errbuf); 1343 goto error; 1344 } 1345 break; 1346 1347 case ZFS_PROP_VOLSIZE: 1348 if (intval % blocksize != 0) { 1349 zfs_nicenum(blocksize, buf, 1350 sizeof (buf)); 1351 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1352 "'%s' must be a multiple of " 1353 "volume block size (%s)"), 1354 propname, buf); 1355 (void) zfs_error(hdl, EZFS_BADPROP, 1356 errbuf); 1357 goto error; 1358 } 1359 1360 if (intval == 0) { 1361 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1362 "'%s' cannot be zero"), 1363 propname); 1364 (void) zfs_error(hdl, EZFS_BADPROP, 1365 errbuf); 1366 goto error; 1367 } 1368 break; 1369 } 1370 } 1371 } 1372 1373 /* 1374 * If normalization was chosen, but no UTF8 choice was made, 1375 * enforce rejection of non-UTF8 names. 1376 * 1377 * If normalization was chosen, but rejecting non-UTF8 names 1378 * was explicitly not chosen, it is an error. 1379 */ 1380 if (chosen_normal > 0 && chosen_utf < 0) { 1381 if (nvlist_add_uint64(ret, 1382 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1383 (void) no_memory(hdl); 1384 goto error; 1385 } 1386 } else if (chosen_normal > 0 && chosen_utf == 0) { 1387 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1388 "'%s' must be set 'on' if normalization chosen"), 1389 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1390 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1391 goto error; 1392 } 1393 return (ret); 1394 1395error: 1396 nvlist_free(ret); 1397 return (NULL); 1398} 1399 1400int 1401zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1402{ 1403 uint64_t old_volsize; 1404 uint64_t new_volsize; 1405 uint64_t old_reservation; 1406 uint64_t new_reservation; 1407 zfs_prop_t resv_prop; 1408 nvlist_t *props; 1409 1410 /* 1411 * If this is an existing volume, and someone is setting the volsize, 1412 * make sure that it matches the reservation, or add it if necessary. 1413 */ 1414 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1415 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1416 return (-1); 1417 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1418 1419 props = fnvlist_alloc(); 1420 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1421 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1422 1423 if ((zvol_volsize_to_reservation(old_volsize, props) != 1424 old_reservation) || nvlist_exists(nvl, 1425 zfs_prop_to_name(resv_prop))) { 1426 fnvlist_free(props); 1427 return (0); 1428 } 1429 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1430 &new_volsize) != 0) { 1431 fnvlist_free(props); 1432 return (-1); 1433 } 1434 new_reservation = zvol_volsize_to_reservation(new_volsize, props); 1435 fnvlist_free(props); 1436 1437 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1438 new_reservation) != 0) { 1439 (void) no_memory(zhp->zfs_hdl); 1440 return (-1); 1441 } 1442 return (1); 1443} 1444 1445void 1446zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1447 char *errbuf) 1448{ 1449 switch (err) { 1450 1451 case ENOSPC: 1452 /* 1453 * For quotas and reservations, ENOSPC indicates 1454 * something different; setting a quota or reservation 1455 * doesn't use any disk space. 1456 */ 1457 switch (prop) { 1458 case ZFS_PROP_QUOTA: 1459 case ZFS_PROP_REFQUOTA: 1460 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1461 "size is less than current used or " 1462 "reserved space")); 1463 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1464 break; 1465 1466 case ZFS_PROP_RESERVATION: 1467 case ZFS_PROP_REFRESERVATION: 1468 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1469 "size is greater than available space")); 1470 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1471 break; 1472 1473 default: 1474 (void) zfs_standard_error(hdl, err, errbuf); 1475 break; 1476 } 1477 break; 1478 1479 case EBUSY: 1480 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1481 break; 1482 1483 case EROFS: 1484 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1485 break; 1486 1487 case ENOTSUP: 1488 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1489 "pool and or dataset must be upgraded to set this " 1490 "property or value")); 1491 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1492 break; 1493 1494 case ERANGE: 1495 case EDOM: 1496 if (prop == ZFS_PROP_COMPRESSION || 1497 prop == ZFS_PROP_RECORDSIZE) { 1498 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1499 "property setting is not allowed on " 1500 "bootable datasets")); 1501 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1502 } else if (prop == ZFS_PROP_CHECKSUM || 1503 prop == ZFS_PROP_DEDUP) { 1504 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1505 "property setting is not allowed on " 1506 "root pools")); 1507 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1508 } else { 1509 (void) zfs_standard_error(hdl, err, errbuf); 1510 } 1511 break; 1512 1513 case EINVAL: 1514 if (prop == ZPROP_INVAL) { 1515 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1516 } else { 1517 (void) zfs_standard_error(hdl, err, errbuf); 1518 } 1519 break; 1520 1521 case EOVERFLOW: 1522 /* 1523 * This platform can't address a volume this big. 1524 */ 1525#ifdef _ILP32 1526 if (prop == ZFS_PROP_VOLSIZE) { 1527 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1528 break; 1529 } 1530#endif 1531 /* FALLTHROUGH */ 1532 default: 1533 (void) zfs_standard_error(hdl, err, errbuf); 1534 } 1535} 1536 1537/* 1538 * Given a property name and value, set the property for the given dataset. 1539 */ 1540int 1541zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1542{ 1543 int ret = -1; 1544 char errbuf[1024]; 1545 libzfs_handle_t *hdl = zhp->zfs_hdl; 1546 nvlist_t *nvl = NULL; 1547 1548 (void) snprintf(errbuf, sizeof (errbuf), 1549 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1550 zhp->zfs_name); 1551 1552 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1553 nvlist_add_string(nvl, propname, propval) != 0) { 1554 (void) no_memory(hdl); 1555 goto error; 1556 } 1557 1558 ret = zfs_prop_set_list(zhp, nvl); 1559 1560error: 1561 nvlist_free(nvl); 1562 return (ret); 1563} 1564 1565 1566 1567/* 1568 * Given an nvlist of property names and values, set the properties for the 1569 * given dataset. 1570 */ 1571int 1572zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1573{ 1574 zfs_cmd_t zc = { 0 }; 1575 int ret = -1; 1576 prop_changelist_t **cls = NULL; 1577 int cl_idx; 1578 char errbuf[1024]; 1579 libzfs_handle_t *hdl = zhp->zfs_hdl; 1580 nvlist_t *nvl; 1581 int nvl_len; 1582 int added_resv; 1583 1584 (void) snprintf(errbuf, sizeof (errbuf), 1585 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1586 zhp->zfs_name); 1587 1588 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1589 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1590 errbuf)) == NULL) 1591 goto error; 1592 1593 /* 1594 * We have to check for any extra properties which need to be added 1595 * before computing the length of the nvlist. 1596 */ 1597 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1598 elem != NULL; 1599 elem = nvlist_next_nvpair(nvl, elem)) { 1600 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1601 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1602 goto error; 1603 } 1604 } 1605 /* 1606 * Check how many properties we're setting and allocate an array to 1607 * store changelist pointers for postfix(). 1608 */ 1609 nvl_len = 0; 1610 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1611 elem != NULL; 1612 elem = nvlist_next_nvpair(nvl, elem)) 1613 nvl_len++; 1614 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1615 goto error; 1616 1617 cl_idx = 0; 1618 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1619 elem != NULL; 1620 elem = nvlist_next_nvpair(nvl, elem)) { 1621 1622 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1623 1624 assert(cl_idx < nvl_len); 1625 /* 1626 * We don't want to unmount & remount the dataset when changing 1627 * its canmount property. We only use the changelist logic to 1628 * unmount when setting canmount=off for a mounted filesystem 1629 * or when setting canmount=on for an unmounted filesystem. 1630 * For all other changes to canmount property the filesystem 1631 * remains the same. 1632 */ 1633 if (prop != ZFS_PROP_CANMOUNT || 1634 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1635 zfs_is_mounted(zhp, NULL)) || 1636 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_ON && 1637 !zfs_is_mounted(zhp, NULL))) { 1638 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1639 if (cls[cl_idx] == NULL) 1640 goto error; 1641 } 1642 1643 if (prop == ZFS_PROP_MOUNTPOINT && 1644 changelist_haszonedchild(cls[cl_idx])) { 1645 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1646 "child dataset with inherited mountpoint is used " 1647 "in a non-global zone")); 1648 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1649 goto error; 1650 } 1651 1652 /* We don't support those properties on FreeBSD. */ 1653 switch (prop) { 1654 case ZFS_PROP_DEVICES: 1655 case ZFS_PROP_ISCSIOPTIONS: 1656 case ZFS_PROP_XATTR: 1657 case ZFS_PROP_VSCAN: 1658 case ZFS_PROP_NBMAND: 1659 case ZFS_PROP_MLSLABEL: 1660 (void) snprintf(errbuf, sizeof (errbuf), 1661 "property '%s' not supported on FreeBSD", 1662 nvpair_name(elem)); 1663 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1664 goto error; 1665 } 1666 1667 if (cls[cl_idx] != NULL && 1668 (ret = changelist_prefix(cls[cl_idx])) != 0) 1669 goto error; 1670 1671 cl_idx++; 1672 } 1673 assert(cl_idx == nvl_len); 1674 1675 /* 1676 * Execute the corresponding ioctl() to set this list of properties. 1677 */ 1678 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1679 1680 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1681 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1682 goto error; 1683 1684 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1685 1686 if (ret != 0) { 1687 /* Get the list of unset properties back and report them. */ 1688 nvlist_t *errorprops = NULL; 1689 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1690 goto error; 1691 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1692 elem != NULL; 1693 elem = nvlist_next_nvpair(nvl, elem)) { 1694 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1695 zfs_setprop_error(hdl, prop, errno, errbuf); 1696 } 1697 nvlist_free(errorprops); 1698 1699 if (added_resv && errno == ENOSPC) { 1700 /* clean up the volsize property we tried to set */ 1701 uint64_t old_volsize = zfs_prop_get_int(zhp, 1702 ZFS_PROP_VOLSIZE); 1703 nvlist_free(nvl); 1704 nvl = NULL; 1705 zcmd_free_nvlists(&zc); 1706 1707 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1708 goto error; 1709 if (nvlist_add_uint64(nvl, 1710 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1711 old_volsize) != 0) 1712 goto error; 1713 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1714 goto error; 1715 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1716 } 1717 } else { 1718 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1719 if (cls[cl_idx] != NULL) { 1720 int clp_err = changelist_postfix(cls[cl_idx]); 1721 if (clp_err != 0) 1722 ret = clp_err; 1723 } 1724 } 1725 1726 /* 1727 * Refresh the statistics so the new property value 1728 * is reflected. 1729 */ 1730 if (ret == 0) 1731 (void) get_stats(zhp); 1732 } 1733 1734error: 1735 nvlist_free(nvl); 1736 zcmd_free_nvlists(&zc); 1737 if (cls != NULL) { 1738 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1739 if (cls[cl_idx] != NULL) 1740 changelist_free(cls[cl_idx]); 1741 } 1742 free(cls); 1743 } 1744 return (ret); 1745} 1746 1747/* 1748 * Given a property, inherit the value from the parent dataset, or if received 1749 * is TRUE, revert to the received value, if any. 1750 */ 1751int 1752zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1753{ 1754 zfs_cmd_t zc = { 0 }; 1755 int ret; 1756 prop_changelist_t *cl; 1757 libzfs_handle_t *hdl = zhp->zfs_hdl; 1758 char errbuf[1024]; 1759 zfs_prop_t prop; 1760 1761 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1762 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1763 1764 zc.zc_cookie = received; 1765 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1766 /* 1767 * For user properties, the amount of work we have to do is very 1768 * small, so just do it here. 1769 */ 1770 if (!zfs_prop_user(propname)) { 1771 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1772 "invalid property")); 1773 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1774 } 1775 1776 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1777 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1778 1779 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1780 return (zfs_standard_error(hdl, errno, errbuf)); 1781 1782 return (0); 1783 } 1784 1785 /* 1786 * Verify that this property is inheritable. 1787 */ 1788 if (zfs_prop_readonly(prop)) 1789 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1790 1791 if (!zfs_prop_inheritable(prop) && !received) 1792 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1793 1794 /* 1795 * Check to see if the value applies to this type 1796 */ 1797 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1798 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1799 1800 /* 1801 * Normalize the name, to get rid of shorthand abbreviations. 1802 */ 1803 propname = zfs_prop_to_name(prop); 1804 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1805 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1806 1807 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1808 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1809 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1810 "dataset is used in a non-global zone")); 1811 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1812 } 1813 1814 /* 1815 * Determine datasets which will be affected by this change, if any. 1816 */ 1817 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1818 return (-1); 1819 1820 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1821 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1822 "child dataset with inherited mountpoint is used " 1823 "in a non-global zone")); 1824 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1825 goto error; 1826 } 1827 1828 if ((ret = changelist_prefix(cl)) != 0) 1829 goto error; 1830 1831 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1832 return (zfs_standard_error(hdl, errno, errbuf)); 1833 } else { 1834 1835 if ((ret = changelist_postfix(cl)) != 0) 1836 goto error; 1837 1838 /* 1839 * Refresh the statistics so the new property is reflected. 1840 */ 1841 (void) get_stats(zhp); 1842 } 1843 1844error: 1845 changelist_free(cl); 1846 return (ret); 1847} 1848 1849/* 1850 * True DSL properties are stored in an nvlist. The following two functions 1851 * extract them appropriately. 1852 */ 1853static uint64_t 1854getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1855{ 1856 nvlist_t *nv; 1857 uint64_t value; 1858 1859 *source = NULL; 1860 if (nvlist_lookup_nvlist(zhp->zfs_props, 1861 zfs_prop_to_name(prop), &nv) == 0) { 1862 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1863 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1864 } else { 1865 verify(!zhp->zfs_props_table || 1866 zhp->zfs_props_table[prop] == B_TRUE); 1867 value = zfs_prop_default_numeric(prop); 1868 *source = ""; 1869 } 1870 1871 return (value); 1872} 1873 1874static const char * 1875getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1876{ 1877 nvlist_t *nv; 1878 const char *value; 1879 1880 *source = NULL; 1881 if (nvlist_lookup_nvlist(zhp->zfs_props, 1882 zfs_prop_to_name(prop), &nv) == 0) { 1883 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 1884 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1885 } else { 1886 verify(!zhp->zfs_props_table || 1887 zhp->zfs_props_table[prop] == B_TRUE); 1888 value = zfs_prop_default_string(prop); 1889 *source = ""; 1890 } 1891 1892 return (value); 1893} 1894 1895static boolean_t 1896zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1897{ 1898 return (zhp->zfs_props == zhp->zfs_recvd_props); 1899} 1900 1901static void 1902zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1903{ 1904 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1905 zhp->zfs_props = zhp->zfs_recvd_props; 1906} 1907 1908static void 1909zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1910{ 1911 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1912 *cookie = 0; 1913} 1914 1915/* 1916 * Internal function for getting a numeric property. Both zfs_prop_get() and 1917 * zfs_prop_get_int() are built using this interface. 1918 * 1919 * Certain properties can be overridden using 'mount -o'. In this case, scan 1920 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1921 * If they differ from the on-disk values, report the current values and mark 1922 * the source "temporary". 1923 */ 1924static int 1925get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1926 char **source, uint64_t *val) 1927{ 1928 zfs_cmd_t zc = { 0 }; 1929 nvlist_t *zplprops = NULL; 1930 struct mnttab mnt; 1931 char *mntopt_on = NULL; 1932 char *mntopt_off = NULL; 1933 boolean_t received = zfs_is_recvd_props_mode(zhp); 1934 1935 *source = NULL; 1936 1937 switch (prop) { 1938 case ZFS_PROP_ATIME: 1939 mntopt_on = MNTOPT_ATIME; 1940 mntopt_off = MNTOPT_NOATIME; 1941 break; 1942 1943 case ZFS_PROP_DEVICES: 1944 mntopt_on = MNTOPT_DEVICES; 1945 mntopt_off = MNTOPT_NODEVICES; 1946 break; 1947 1948 case ZFS_PROP_EXEC: 1949 mntopt_on = MNTOPT_EXEC; 1950 mntopt_off = MNTOPT_NOEXEC; 1951 break; 1952 1953 case ZFS_PROP_READONLY: 1954 mntopt_on = MNTOPT_RO; 1955 mntopt_off = MNTOPT_RW; 1956 break; 1957 1958 case ZFS_PROP_SETUID: 1959 mntopt_on = MNTOPT_SETUID; 1960 mntopt_off = MNTOPT_NOSETUID; 1961 break; 1962 1963 case ZFS_PROP_XATTR: 1964 mntopt_on = MNTOPT_XATTR; 1965 mntopt_off = MNTOPT_NOXATTR; 1966 break; 1967 1968 case ZFS_PROP_NBMAND: 1969 mntopt_on = MNTOPT_NBMAND; 1970 mntopt_off = MNTOPT_NONBMAND; 1971 break; 1972 } 1973 1974 /* 1975 * Because looking up the mount options is potentially expensive 1976 * (iterating over all of /etc/mnttab), we defer its calculation until 1977 * we're looking up a property which requires its presence. 1978 */ 1979 if (!zhp->zfs_mntcheck && 1980 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1981 libzfs_handle_t *hdl = zhp->zfs_hdl; 1982 struct mnttab entry; 1983 1984 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1985 zhp->zfs_mntopts = zfs_strdup(hdl, 1986 entry.mnt_mntopts); 1987 if (zhp->zfs_mntopts == NULL) 1988 return (-1); 1989 } 1990 1991 zhp->zfs_mntcheck = B_TRUE; 1992 } 1993 1994 if (zhp->zfs_mntopts == NULL) 1995 mnt.mnt_mntopts = ""; 1996 else 1997 mnt.mnt_mntopts = zhp->zfs_mntopts; 1998 1999 switch (prop) { 2000 case ZFS_PROP_ATIME: 2001 case ZFS_PROP_DEVICES: 2002 case ZFS_PROP_EXEC: 2003 case ZFS_PROP_READONLY: 2004 case ZFS_PROP_SETUID: 2005 case ZFS_PROP_XATTR: 2006 case ZFS_PROP_NBMAND: 2007 *val = getprop_uint64(zhp, prop, source); 2008 2009 if (received) 2010 break; 2011 2012 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2013 *val = B_TRUE; 2014 if (src) 2015 *src = ZPROP_SRC_TEMPORARY; 2016 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2017 *val = B_FALSE; 2018 if (src) 2019 *src = ZPROP_SRC_TEMPORARY; 2020 } 2021 break; 2022 2023 case ZFS_PROP_CANMOUNT: 2024 case ZFS_PROP_VOLSIZE: 2025 case ZFS_PROP_QUOTA: 2026 case ZFS_PROP_REFQUOTA: 2027 case ZFS_PROP_RESERVATION: 2028 case ZFS_PROP_REFRESERVATION: 2029 case ZFS_PROP_FILESYSTEM_LIMIT: 2030 case ZFS_PROP_SNAPSHOT_LIMIT: 2031 case ZFS_PROP_FILESYSTEM_COUNT: 2032 case ZFS_PROP_SNAPSHOT_COUNT: 2033 *val = getprop_uint64(zhp, prop, source); 2034 2035 if (*source == NULL) { 2036 /* not default, must be local */ 2037 *source = zhp->zfs_name; 2038 } 2039 break; 2040 2041 case ZFS_PROP_MOUNTED: 2042 *val = (zhp->zfs_mntopts != NULL); 2043 break; 2044 2045 case ZFS_PROP_NUMCLONES: 2046 *val = zhp->zfs_dmustats.dds_num_clones; 2047 break; 2048 2049 case ZFS_PROP_VERSION: 2050 case ZFS_PROP_NORMALIZE: 2051 case ZFS_PROP_UTF8ONLY: 2052 case ZFS_PROP_CASE: 2053 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2054 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2055 return (-1); 2056 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2057 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2058 zcmd_free_nvlists(&zc); 2059 return (-1); 2060 } 2061 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2062 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2063 val) != 0) { 2064 zcmd_free_nvlists(&zc); 2065 return (-1); 2066 } 2067 nvlist_free(zplprops); 2068 zcmd_free_nvlists(&zc); 2069 break; 2070 2071 case ZFS_PROP_INCONSISTENT: 2072 *val = zhp->zfs_dmustats.dds_inconsistent; 2073 break; 2074 2075 default: 2076 switch (zfs_prop_get_type(prop)) { 2077 case PROP_TYPE_NUMBER: 2078 case PROP_TYPE_INDEX: 2079 *val = getprop_uint64(zhp, prop, source); 2080 /* 2081 * If we tried to use a default value for a 2082 * readonly property, it means that it was not 2083 * present. 2084 */ 2085 if (zfs_prop_readonly(prop) && 2086 *source != NULL && (*source)[0] == '\0') { 2087 *source = NULL; 2088 } 2089 break; 2090 2091 case PROP_TYPE_STRING: 2092 default: 2093 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2094 "cannot get non-numeric property")); 2095 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2096 dgettext(TEXT_DOMAIN, "internal error"))); 2097 } 2098 } 2099 2100 return (0); 2101} 2102 2103/* 2104 * Calculate the source type, given the raw source string. 2105 */ 2106static void 2107get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2108 char *statbuf, size_t statlen) 2109{ 2110 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2111 return; 2112 2113 if (source == NULL) { 2114 *srctype = ZPROP_SRC_NONE; 2115 } else if (source[0] == '\0') { 2116 *srctype = ZPROP_SRC_DEFAULT; 2117 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2118 *srctype = ZPROP_SRC_RECEIVED; 2119 } else { 2120 if (strcmp(source, zhp->zfs_name) == 0) { 2121 *srctype = ZPROP_SRC_LOCAL; 2122 } else { 2123 (void) strlcpy(statbuf, source, statlen); 2124 *srctype = ZPROP_SRC_INHERITED; 2125 } 2126 } 2127 2128} 2129 2130int 2131zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2132 size_t proplen, boolean_t literal) 2133{ 2134 zfs_prop_t prop; 2135 int err = 0; 2136 2137 if (zhp->zfs_recvd_props == NULL) 2138 if (get_recvd_props_ioctl(zhp) != 0) 2139 return (-1); 2140 2141 prop = zfs_name_to_prop(propname); 2142 2143 if (prop != ZPROP_INVAL) { 2144 uint64_t cookie; 2145 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2146 return (-1); 2147 zfs_set_recvd_props_mode(zhp, &cookie); 2148 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2149 NULL, NULL, 0, literal); 2150 zfs_unset_recvd_props_mode(zhp, &cookie); 2151 } else { 2152 nvlist_t *propval; 2153 char *recvdval; 2154 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2155 propname, &propval) != 0) 2156 return (-1); 2157 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2158 &recvdval) == 0); 2159 (void) strlcpy(propbuf, recvdval, proplen); 2160 } 2161 2162 return (err == 0 ? 0 : -1); 2163} 2164 2165static int 2166get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2167{ 2168 nvlist_t *value; 2169 nvpair_t *pair; 2170 2171 value = zfs_get_clones_nvl(zhp); 2172 if (value == NULL) 2173 return (-1); 2174 2175 propbuf[0] = '\0'; 2176 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2177 pair = nvlist_next_nvpair(value, pair)) { 2178 if (propbuf[0] != '\0') 2179 (void) strlcat(propbuf, ",", proplen); 2180 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2181 } 2182 2183 return (0); 2184} 2185 2186struct get_clones_arg { 2187 uint64_t numclones; 2188 nvlist_t *value; 2189 const char *origin; 2190 char buf[ZFS_MAXNAMELEN]; 2191}; 2192 2193int 2194get_clones_cb(zfs_handle_t *zhp, void *arg) 2195{ 2196 struct get_clones_arg *gca = arg; 2197 2198 if (gca->numclones == 0) { 2199 zfs_close(zhp); 2200 return (0); 2201 } 2202 2203 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2204 NULL, NULL, 0, B_TRUE) != 0) 2205 goto out; 2206 if (strcmp(gca->buf, gca->origin) == 0) { 2207 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2208 gca->numclones--; 2209 } 2210 2211out: 2212 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2213 zfs_close(zhp); 2214 return (0); 2215} 2216 2217nvlist_t * 2218zfs_get_clones_nvl(zfs_handle_t *zhp) 2219{ 2220 nvlist_t *nv, *value; 2221 2222 if (nvlist_lookup_nvlist(zhp->zfs_props, 2223 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2224 struct get_clones_arg gca; 2225 2226 /* 2227 * if this is a snapshot, then the kernel wasn't able 2228 * to get the clones. Do it by slowly iterating. 2229 */ 2230 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2231 return (NULL); 2232 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2233 return (NULL); 2234 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2235 nvlist_free(nv); 2236 return (NULL); 2237 } 2238 2239 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2240 gca.value = value; 2241 gca.origin = zhp->zfs_name; 2242 2243 if (gca.numclones != 0) { 2244 zfs_handle_t *root; 2245 char pool[ZFS_MAXNAMELEN]; 2246 char *cp = pool; 2247 2248 /* get the pool name */ 2249 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2250 (void) strsep(&cp, "/@"); 2251 root = zfs_open(zhp->zfs_hdl, pool, 2252 ZFS_TYPE_FILESYSTEM); 2253 2254 (void) get_clones_cb(root, &gca); 2255 } 2256 2257 if (gca.numclones != 0 || 2258 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2259 nvlist_add_nvlist(zhp->zfs_props, 2260 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2261 nvlist_free(nv); 2262 nvlist_free(value); 2263 return (NULL); 2264 } 2265 nvlist_free(nv); 2266 nvlist_free(value); 2267 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2268 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2269 } 2270 2271 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2272 2273 return (value); 2274} 2275 2276/* 2277 * Retrieve a property from the given object. If 'literal' is specified, then 2278 * numbers are left as exact values. Otherwise, numbers are converted to a 2279 * human-readable form. 2280 * 2281 * Returns 0 on success, or -1 on error. 2282 */ 2283int 2284zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2285 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2286{ 2287 char *source = NULL; 2288 uint64_t val; 2289 const char *str; 2290 const char *strval; 2291 boolean_t received = zfs_is_recvd_props_mode(zhp); 2292 2293 /* 2294 * Check to see if this property applies to our object 2295 */ 2296 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2297 return (-1); 2298 2299 if (received && zfs_prop_readonly(prop)) 2300 return (-1); 2301 2302 if (src) 2303 *src = ZPROP_SRC_NONE; 2304 2305 switch (prop) { 2306 case ZFS_PROP_CREATION: 2307 /* 2308 * 'creation' is a time_t stored in the statistics. We convert 2309 * this into a string unless 'literal' is specified. 2310 */ 2311 { 2312 val = getprop_uint64(zhp, prop, &source); 2313 time_t time = (time_t)val; 2314 struct tm t; 2315 2316 if (literal || 2317 localtime_r(&time, &t) == NULL || 2318 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2319 &t) == 0) 2320 (void) snprintf(propbuf, proplen, "%llu", val); 2321 } 2322 break; 2323 2324 case ZFS_PROP_MOUNTPOINT: 2325 /* 2326 * Getting the precise mountpoint can be tricky. 2327 * 2328 * - for 'none' or 'legacy', return those values. 2329 * - for inherited mountpoints, we want to take everything 2330 * after our ancestor and append it to the inherited value. 2331 * 2332 * If the pool has an alternate root, we want to prepend that 2333 * root to any values we return. 2334 */ 2335 2336 str = getprop_string(zhp, prop, &source); 2337 2338 if (str[0] == '/') { 2339 char buf[MAXPATHLEN]; 2340 char *root = buf; 2341 const char *relpath; 2342 2343 /* 2344 * If we inherit the mountpoint, even from a dataset 2345 * with a received value, the source will be the path of 2346 * the dataset we inherit from. If source is 2347 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2348 * inherited. 2349 */ 2350 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2351 relpath = ""; 2352 } else { 2353 relpath = zhp->zfs_name + strlen(source); 2354 if (relpath[0] == '/') 2355 relpath++; 2356 } 2357 2358 if ((zpool_get_prop(zhp->zpool_hdl, 2359 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2360 B_FALSE)) || (strcmp(root, "-") == 0)) 2361 root[0] = '\0'; 2362 /* 2363 * Special case an alternate root of '/'. This will 2364 * avoid having multiple leading slashes in the 2365 * mountpoint path. 2366 */ 2367 if (strcmp(root, "/") == 0) 2368 root++; 2369 2370 /* 2371 * If the mountpoint is '/' then skip over this 2372 * if we are obtaining either an alternate root or 2373 * an inherited mountpoint. 2374 */ 2375 if (str[1] == '\0' && (root[0] != '\0' || 2376 relpath[0] != '\0')) 2377 str++; 2378 2379 if (relpath[0] == '\0') 2380 (void) snprintf(propbuf, proplen, "%s%s", 2381 root, str); 2382 else 2383 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2384 root, str, relpath[0] == '@' ? "" : "/", 2385 relpath); 2386 } else { 2387 /* 'legacy' or 'none' */ 2388 (void) strlcpy(propbuf, str, proplen); 2389 } 2390 2391 break; 2392 2393 case ZFS_PROP_ORIGIN: 2394 str = getprop_string(zhp, prop, &source); 2395 if (str == NULL) 2396 return (-1); 2397 (void) strlcpy(propbuf, str, proplen); 2398 break; 2399 2400 case ZFS_PROP_CLONES: 2401 if (get_clones_string(zhp, propbuf, proplen) != 0) 2402 return (-1); 2403 break; 2404 2405 case ZFS_PROP_QUOTA: 2406 case ZFS_PROP_REFQUOTA: 2407 case ZFS_PROP_RESERVATION: 2408 case ZFS_PROP_REFRESERVATION: 2409 2410 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2411 return (-1); 2412 2413 /* 2414 * If quota or reservation is 0, we translate this into 'none' 2415 * (unless literal is set), and indicate that it's the default 2416 * value. Otherwise, we print the number nicely and indicate 2417 * that its set locally. 2418 */ 2419 if (val == 0) { 2420 if (literal) 2421 (void) strlcpy(propbuf, "0", proplen); 2422 else 2423 (void) strlcpy(propbuf, "none", proplen); 2424 } else { 2425 if (literal) 2426 (void) snprintf(propbuf, proplen, "%llu", 2427 (u_longlong_t)val); 2428 else 2429 zfs_nicenum(val, propbuf, proplen); 2430 } 2431 break; 2432 2433 case ZFS_PROP_FILESYSTEM_LIMIT: 2434 case ZFS_PROP_SNAPSHOT_LIMIT: 2435 case ZFS_PROP_FILESYSTEM_COUNT: 2436 case ZFS_PROP_SNAPSHOT_COUNT: 2437 2438 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2439 return (-1); 2440 2441 /* 2442 * If limit is UINT64_MAX, we translate this into 'none' (unless 2443 * literal is set), and indicate that it's the default value. 2444 * Otherwise, we print the number nicely and indicate that it's 2445 * set locally. 2446 */ 2447 if (literal) { 2448 (void) snprintf(propbuf, proplen, "%llu", 2449 (u_longlong_t)val); 2450 } else if (val == UINT64_MAX) { 2451 (void) strlcpy(propbuf, "none", proplen); 2452 } else { 2453 zfs_nicenum(val, propbuf, proplen); 2454 } 2455 break; 2456 2457 case ZFS_PROP_REFRATIO: 2458 case ZFS_PROP_COMPRESSRATIO: 2459 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2460 return (-1); 2461 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2462 (u_longlong_t)(val / 100), 2463 (u_longlong_t)(val % 100)); 2464 break; 2465 2466 case ZFS_PROP_TYPE: 2467 switch (zhp->zfs_type) { 2468 case ZFS_TYPE_FILESYSTEM: 2469 str = "filesystem"; 2470 break; 2471 case ZFS_TYPE_VOLUME: 2472 str = "volume"; 2473 break; 2474 case ZFS_TYPE_SNAPSHOT: 2475 str = "snapshot"; 2476 break; 2477 case ZFS_TYPE_BOOKMARK: 2478 str = "bookmark"; 2479 break; 2480 default: 2481 abort(); 2482 } 2483 (void) snprintf(propbuf, proplen, "%s", str); 2484 break; 2485 2486 case ZFS_PROP_MOUNTED: 2487 /* 2488 * The 'mounted' property is a pseudo-property that described 2489 * whether the filesystem is currently mounted. Even though 2490 * it's a boolean value, the typical values of "on" and "off" 2491 * don't make sense, so we translate to "yes" and "no". 2492 */ 2493 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2494 src, &source, &val) != 0) 2495 return (-1); 2496 if (val) 2497 (void) strlcpy(propbuf, "yes", proplen); 2498 else 2499 (void) strlcpy(propbuf, "no", proplen); 2500 break; 2501 2502 case ZFS_PROP_NAME: 2503 /* 2504 * The 'name' property is a pseudo-property derived from the 2505 * dataset name. It is presented as a real property to simplify 2506 * consumers. 2507 */ 2508 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2509 break; 2510 2511 case ZFS_PROP_MLSLABEL: 2512 { 2513#ifdef illumos 2514 m_label_t *new_sl = NULL; 2515 char *ascii = NULL; /* human readable label */ 2516 2517 (void) strlcpy(propbuf, 2518 getprop_string(zhp, prop, &source), proplen); 2519 2520 if (literal || (strcasecmp(propbuf, 2521 ZFS_MLSLABEL_DEFAULT) == 0)) 2522 break; 2523 2524 /* 2525 * Try to translate the internal hex string to 2526 * human-readable output. If there are any 2527 * problems just use the hex string. 2528 */ 2529 2530 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2531 L_NO_CORRECTION, NULL) == -1) { 2532 m_label_free(new_sl); 2533 break; 2534 } 2535 2536 if (label_to_str(new_sl, &ascii, M_LABEL, 2537 DEF_NAMES) != 0) { 2538 if (ascii) 2539 free(ascii); 2540 m_label_free(new_sl); 2541 break; 2542 } 2543 m_label_free(new_sl); 2544 2545 (void) strlcpy(propbuf, ascii, proplen); 2546 free(ascii); 2547#else /* !illumos */ 2548 propbuf[0] = '\0'; 2549#endif /* illumos */ 2550 } 2551 break; 2552 2553 case ZFS_PROP_GUID: 2554 /* 2555 * GUIDs are stored as numbers, but they are identifiers. 2556 * We don't want them to be pretty printed, because pretty 2557 * printing mangles the ID into a truncated and useless value. 2558 */ 2559 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2560 return (-1); 2561 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2562 break; 2563 2564 default: 2565 switch (zfs_prop_get_type(prop)) { 2566 case PROP_TYPE_NUMBER: 2567 if (get_numeric_property(zhp, prop, src, 2568 &source, &val) != 0) 2569 return (-1); 2570 if (literal) 2571 (void) snprintf(propbuf, proplen, "%llu", 2572 (u_longlong_t)val); 2573 else 2574 zfs_nicenum(val, propbuf, proplen); 2575 break; 2576 2577 case PROP_TYPE_STRING: 2578 str = getprop_string(zhp, prop, &source); 2579 if (str == NULL) 2580 return (-1); 2581 (void) strlcpy(propbuf, str, proplen); 2582 break; 2583 2584 case PROP_TYPE_INDEX: 2585 if (get_numeric_property(zhp, prop, src, 2586 &source, &val) != 0) 2587 return (-1); 2588 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2589 return (-1); 2590 (void) strlcpy(propbuf, strval, proplen); 2591 break; 2592 2593 default: 2594 abort(); 2595 } 2596 } 2597 2598 get_source(zhp, src, source, statbuf, statlen); 2599 2600 return (0); 2601} 2602 2603/* 2604 * Utility function to get the given numeric property. Does no validation that 2605 * the given property is the appropriate type; should only be used with 2606 * hard-coded property types. 2607 */ 2608uint64_t 2609zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2610{ 2611 char *source; 2612 uint64_t val; 2613 2614 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2615 2616 return (val); 2617} 2618 2619int 2620zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2621{ 2622 char buf[64]; 2623 2624 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2625 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2626} 2627 2628/* 2629 * Similar to zfs_prop_get(), but returns the value as an integer. 2630 */ 2631int 2632zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2633 zprop_source_t *src, char *statbuf, size_t statlen) 2634{ 2635 char *source; 2636 2637 /* 2638 * Check to see if this property applies to our object 2639 */ 2640 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2641 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2642 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2643 zfs_prop_to_name(prop))); 2644 } 2645 2646 if (src) 2647 *src = ZPROP_SRC_NONE; 2648 2649 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2650 return (-1); 2651 2652 get_source(zhp, src, source, statbuf, statlen); 2653 2654 return (0); 2655} 2656 2657static int 2658idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2659 char **domainp, idmap_rid_t *ridp) 2660{ 2661#ifdef illumos 2662 idmap_get_handle_t *get_hdl = NULL; 2663 idmap_stat status; 2664 int err = EINVAL; 2665 2666 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2667 goto out; 2668 2669 if (isuser) { 2670 err = idmap_get_sidbyuid(get_hdl, id, 2671 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2672 } else { 2673 err = idmap_get_sidbygid(get_hdl, id, 2674 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2675 } 2676 if (err == IDMAP_SUCCESS && 2677 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2678 status == IDMAP_SUCCESS) 2679 err = 0; 2680 else 2681 err = EINVAL; 2682out: 2683 if (get_hdl) 2684 idmap_get_destroy(get_hdl); 2685 return (err); 2686#else /* !illumos */ 2687 assert(!"invalid code path"); 2688 return (EINVAL); // silence compiler warning 2689#endif /* illumos */ 2690} 2691 2692/* 2693 * convert the propname into parameters needed by kernel 2694 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2695 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2696 */ 2697static int 2698userquota_propname_decode(const char *propname, boolean_t zoned, 2699 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2700{ 2701 zfs_userquota_prop_t type; 2702 char *cp, *end; 2703 char *numericsid = NULL; 2704 boolean_t isuser; 2705 2706 domain[0] = '\0'; 2707 *ridp = 0; 2708 /* Figure out the property type ({user|group}{quota|space}) */ 2709 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2710 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2711 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2712 break; 2713 } 2714 if (type == ZFS_NUM_USERQUOTA_PROPS) 2715 return (EINVAL); 2716 *typep = type; 2717 2718 isuser = (type == ZFS_PROP_USERQUOTA || 2719 type == ZFS_PROP_USERUSED); 2720 2721 cp = strchr(propname, '@') + 1; 2722 2723 if (strchr(cp, '@')) { 2724#ifdef illumos 2725 /* 2726 * It's a SID name (eg "user@domain") that needs to be 2727 * turned into S-1-domainID-RID. 2728 */ 2729 int flag = 0; 2730 idmap_stat stat, map_stat; 2731 uid_t pid; 2732 idmap_rid_t rid; 2733 idmap_get_handle_t *gh = NULL; 2734 2735 stat = idmap_get_create(&gh); 2736 if (stat != IDMAP_SUCCESS) { 2737 idmap_get_destroy(gh); 2738 return (ENOMEM); 2739 } 2740 if (zoned && getzoneid() == GLOBAL_ZONEID) 2741 return (ENOENT); 2742 if (isuser) { 2743 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2744 if (stat < 0) 2745 return (ENOENT); 2746 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2747 &rid, &map_stat); 2748 } else { 2749 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2750 if (stat < 0) 2751 return (ENOENT); 2752 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2753 &rid, &map_stat); 2754 } 2755 if (stat < 0) { 2756 idmap_get_destroy(gh); 2757 return (ENOENT); 2758 } 2759 stat = idmap_get_mappings(gh); 2760 idmap_get_destroy(gh); 2761 2762 if (stat < 0) { 2763 return (ENOENT); 2764 } 2765 if (numericsid == NULL) 2766 return (ENOENT); 2767 cp = numericsid; 2768 *ridp = rid; 2769 /* will be further decoded below */ 2770#else /* !illumos */ 2771 return (ENOENT); 2772#endif /* illumos */ 2773 } 2774 2775 if (strncmp(cp, "S-1-", 4) == 0) { 2776 /* It's a numeric SID (eg "S-1-234-567-89") */ 2777 (void) strlcpy(domain, cp, domainlen); 2778 errno = 0; 2779 if (*ridp == 0) { 2780 cp = strrchr(domain, '-'); 2781 *cp = '\0'; 2782 cp++; 2783 *ridp = strtoull(cp, &end, 10); 2784 } else { 2785 end = ""; 2786 } 2787 if (numericsid) { 2788 free(numericsid); 2789 numericsid = NULL; 2790 } 2791 if (errno != 0 || *end != '\0') 2792 return (EINVAL); 2793 } else if (!isdigit(*cp)) { 2794 /* 2795 * It's a user/group name (eg "user") that needs to be 2796 * turned into a uid/gid 2797 */ 2798 if (zoned && getzoneid() == GLOBAL_ZONEID) 2799 return (ENOENT); 2800 if (isuser) { 2801 struct passwd *pw; 2802 pw = getpwnam(cp); 2803 if (pw == NULL) 2804 return (ENOENT); 2805 *ridp = pw->pw_uid; 2806 } else { 2807 struct group *gr; 2808 gr = getgrnam(cp); 2809 if (gr == NULL) 2810 return (ENOENT); 2811 *ridp = gr->gr_gid; 2812 } 2813 } else { 2814 /* It's a user/group ID (eg "12345"). */ 2815 uid_t id = strtoul(cp, &end, 10); 2816 idmap_rid_t rid; 2817 char *mapdomain; 2818 2819 if (*end != '\0') 2820 return (EINVAL); 2821 if (id > MAXUID) { 2822 /* It's an ephemeral ID. */ 2823 if (idmap_id_to_numeric_domain_rid(id, isuser, 2824 &mapdomain, &rid) != 0) 2825 return (ENOENT); 2826 (void) strlcpy(domain, mapdomain, domainlen); 2827 *ridp = rid; 2828 } else { 2829 *ridp = id; 2830 } 2831 } 2832 2833 ASSERT3P(numericsid, ==, NULL); 2834 return (0); 2835} 2836 2837static int 2838zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2839 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2840{ 2841 int err; 2842 zfs_cmd_t zc = { 0 }; 2843 2844 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2845 2846 err = userquota_propname_decode(propname, 2847 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2848 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2849 zc.zc_objset_type = *typep; 2850 if (err) 2851 return (err); 2852 2853 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2854 if (err) 2855 return (err); 2856 2857 *propvalue = zc.zc_cookie; 2858 return (0); 2859} 2860 2861int 2862zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2863 uint64_t *propvalue) 2864{ 2865 zfs_userquota_prop_t type; 2866 2867 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2868 &type)); 2869} 2870 2871int 2872zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2873 char *propbuf, int proplen, boolean_t literal) 2874{ 2875 int err; 2876 uint64_t propvalue; 2877 zfs_userquota_prop_t type; 2878 2879 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2880 &type); 2881 2882 if (err) 2883 return (err); 2884 2885 if (literal) { 2886 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2887 } else if (propvalue == 0 && 2888 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2889 (void) strlcpy(propbuf, "none", proplen); 2890 } else { 2891 zfs_nicenum(propvalue, propbuf, proplen); 2892 } 2893 return (0); 2894} 2895 2896int 2897zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2898 uint64_t *propvalue) 2899{ 2900 int err; 2901 zfs_cmd_t zc = { 0 }; 2902 const char *snapname; 2903 2904 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2905 2906 snapname = strchr(propname, '@') + 1; 2907 if (strchr(snapname, '@')) { 2908 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2909 } else { 2910 /* snapname is the short name, append it to zhp's fsname */ 2911 char *cp; 2912 2913 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2914 sizeof (zc.zc_value)); 2915 cp = strchr(zc.zc_value, '@'); 2916 if (cp != NULL) 2917 *cp = '\0'; 2918 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2919 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2920 } 2921 2922 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2923 if (err) 2924 return (err); 2925 2926 *propvalue = zc.zc_cookie; 2927 return (0); 2928} 2929 2930int 2931zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2932 char *propbuf, int proplen, boolean_t literal) 2933{ 2934 int err; 2935 uint64_t propvalue; 2936 2937 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2938 2939 if (err) 2940 return (err); 2941 2942 if (literal) { 2943 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2944 } else { 2945 zfs_nicenum(propvalue, propbuf, proplen); 2946 } 2947 return (0); 2948} 2949 2950/* 2951 * Returns the name of the given zfs handle. 2952 */ 2953const char * 2954zfs_get_name(const zfs_handle_t *zhp) 2955{ 2956 return (zhp->zfs_name); 2957} 2958 2959/* 2960 * Returns the type of the given zfs handle. 2961 */ 2962zfs_type_t 2963zfs_get_type(const zfs_handle_t *zhp) 2964{ 2965 return (zhp->zfs_type); 2966} 2967 2968/* 2969 * Is one dataset name a child dataset of another? 2970 * 2971 * Needs to handle these cases: 2972 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2973 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2974 * Descendant? No. No. No. Yes. 2975 */ 2976static boolean_t 2977is_descendant(const char *ds1, const char *ds2) 2978{ 2979 size_t d1len = strlen(ds1); 2980 2981 /* ds2 can't be a descendant if it's smaller */ 2982 if (strlen(ds2) < d1len) 2983 return (B_FALSE); 2984 2985 /* otherwise, compare strings and verify that there's a '/' char */ 2986 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2987} 2988 2989/* 2990 * Given a complete name, return just the portion that refers to the parent. 2991 * Will return -1 if there is no parent (path is just the name of the 2992 * pool). 2993 */ 2994static int 2995parent_name(const char *path, char *buf, size_t buflen) 2996{ 2997 char *slashp; 2998 2999 (void) strlcpy(buf, path, buflen); 3000 3001 if ((slashp = strrchr(buf, '/')) == NULL) 3002 return (-1); 3003 *slashp = '\0'; 3004 3005 return (0); 3006} 3007 3008/* 3009 * If accept_ancestor is false, then check to make sure that the given path has 3010 * a parent, and that it exists. If accept_ancestor is true, then find the 3011 * closest existing ancestor for the given path. In prefixlen return the 3012 * length of already existing prefix of the given path. We also fetch the 3013 * 'zoned' property, which is used to validate property settings when creating 3014 * new datasets. 3015 */ 3016static int 3017check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3018 boolean_t accept_ancestor, int *prefixlen) 3019{ 3020 zfs_cmd_t zc = { 0 }; 3021 char parent[ZFS_MAXNAMELEN]; 3022 char *slash; 3023 zfs_handle_t *zhp; 3024 char errbuf[1024]; 3025 uint64_t is_zoned; 3026 3027 (void) snprintf(errbuf, sizeof (errbuf), 3028 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3029 3030 /* get parent, and check to see if this is just a pool */ 3031 if (parent_name(path, parent, sizeof (parent)) != 0) { 3032 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3033 "missing dataset name")); 3034 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3035 } 3036 3037 /* check to see if the pool exists */ 3038 if ((slash = strchr(parent, '/')) == NULL) 3039 slash = parent + strlen(parent); 3040 (void) strncpy(zc.zc_name, parent, slash - parent); 3041 zc.zc_name[slash - parent] = '\0'; 3042 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3043 errno == ENOENT) { 3044 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3045 "no such pool '%s'"), zc.zc_name); 3046 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3047 } 3048 3049 /* check to see if the parent dataset exists */ 3050 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3051 if (errno == ENOENT && accept_ancestor) { 3052 /* 3053 * Go deeper to find an ancestor, give up on top level. 3054 */ 3055 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3056 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3057 "no such pool '%s'"), zc.zc_name); 3058 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3059 } 3060 } else if (errno == ENOENT) { 3061 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3062 "parent does not exist")); 3063 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3064 } else 3065 return (zfs_standard_error(hdl, errno, errbuf)); 3066 } 3067 3068 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3069 if (zoned != NULL) 3070 *zoned = is_zoned; 3071 3072 /* we are in a non-global zone, but parent is in the global zone */ 3073 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3074 (void) zfs_standard_error(hdl, EPERM, errbuf); 3075 zfs_close(zhp); 3076 return (-1); 3077 } 3078 3079 /* make sure parent is a filesystem */ 3080 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3081 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3082 "parent is not a filesystem")); 3083 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3084 zfs_close(zhp); 3085 return (-1); 3086 } 3087 3088 zfs_close(zhp); 3089 if (prefixlen != NULL) 3090 *prefixlen = strlen(parent); 3091 return (0); 3092} 3093 3094/* 3095 * Finds whether the dataset of the given type(s) exists. 3096 */ 3097boolean_t 3098zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3099{ 3100 zfs_handle_t *zhp; 3101 3102 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3103 return (B_FALSE); 3104 3105 /* 3106 * Try to get stats for the dataset, which will tell us if it exists. 3107 */ 3108 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3109 int ds_type = zhp->zfs_type; 3110 3111 zfs_close(zhp); 3112 if (types & ds_type) 3113 return (B_TRUE); 3114 } 3115 return (B_FALSE); 3116} 3117 3118/* 3119 * Given a path to 'target', create all the ancestors between 3120 * the prefixlen portion of the path, and the target itself. 3121 * Fail if the initial prefixlen-ancestor does not already exist. 3122 */ 3123int 3124create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3125{ 3126 zfs_handle_t *h; 3127 char *cp; 3128 const char *opname; 3129 3130 /* make sure prefix exists */ 3131 cp = target + prefixlen; 3132 if (*cp != '/') { 3133 assert(strchr(cp, '/') == NULL); 3134 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3135 } else { 3136 *cp = '\0'; 3137 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3138 *cp = '/'; 3139 } 3140 if (h == NULL) 3141 return (-1); 3142 zfs_close(h); 3143 3144 /* 3145 * Attempt to create, mount, and share any ancestor filesystems, 3146 * up to the prefixlen-long one. 3147 */ 3148 for (cp = target + prefixlen + 1; 3149 cp = strchr(cp, '/'); *cp = '/', cp++) { 3150 3151 *cp = '\0'; 3152 3153 h = make_dataset_handle(hdl, target); 3154 if (h) { 3155 /* it already exists, nothing to do here */ 3156 zfs_close(h); 3157 continue; 3158 } 3159 3160 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3161 NULL) != 0) { 3162 opname = dgettext(TEXT_DOMAIN, "create"); 3163 goto ancestorerr; 3164 } 3165 3166 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3167 if (h == NULL) { 3168 opname = dgettext(TEXT_DOMAIN, "open"); 3169 goto ancestorerr; 3170 } 3171 3172 if (zfs_mount(h, NULL, 0) != 0) { 3173 opname = dgettext(TEXT_DOMAIN, "mount"); 3174 goto ancestorerr; 3175 } 3176 3177 if (zfs_share(h) != 0) { 3178 opname = dgettext(TEXT_DOMAIN, "share"); 3179 goto ancestorerr; 3180 } 3181 3182 zfs_close(h); 3183 } 3184 3185 return (0); 3186 3187ancestorerr: 3188 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3189 "failed to %s ancestor '%s'"), opname, target); 3190 return (-1); 3191} 3192 3193/* 3194 * Creates non-existing ancestors of the given path. 3195 */ 3196int 3197zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3198{ 3199 int prefix; 3200 char *path_copy; 3201 int rc; 3202 3203 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3204 return (-1); 3205 3206 if ((path_copy = strdup(path)) != NULL) { 3207 rc = create_parents(hdl, path_copy, prefix); 3208 free(path_copy); 3209 } 3210 if (path_copy == NULL || rc != 0) 3211 return (-1); 3212 3213 return (0); 3214} 3215 3216/* 3217 * Create a new filesystem or volume. 3218 */ 3219int 3220zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3221 nvlist_t *props) 3222{ 3223 int ret; 3224 uint64_t size = 0; 3225 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3226 char errbuf[1024]; 3227 uint64_t zoned; 3228 enum lzc_dataset_type ost; 3229 3230 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3231 "cannot create '%s'"), path); 3232 3233 /* validate the path, taking care to note the extended error message */ 3234 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3235 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3236 3237 /* validate parents exist */ 3238 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3239 return (-1); 3240 3241 /* 3242 * The failure modes when creating a dataset of a different type over 3243 * one that already exists is a little strange. In particular, if you 3244 * try to create a dataset on top of an existing dataset, the ioctl() 3245 * will return ENOENT, not EEXIST. To prevent this from happening, we 3246 * first try to see if the dataset exists. 3247 */ 3248 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3249 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3250 "dataset already exists")); 3251 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3252 } 3253 3254 if (type == ZFS_TYPE_VOLUME) 3255 ost = LZC_DATSET_TYPE_ZVOL; 3256 else 3257 ost = LZC_DATSET_TYPE_ZFS; 3258 3259 /* open zpool handle for prop validation */ 3260 char pool_path[MAXNAMELEN]; 3261 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3262 3263 /* truncate pool_path at first slash */ 3264 char *p = strchr(pool_path, '/'); 3265 if (p != NULL) 3266 *p = '\0'; 3267 3268 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path); 3269 3270 if (props && (props = zfs_valid_proplist(hdl, type, props, 3271 zoned, NULL, zpool_handle, errbuf)) == 0) { 3272 zpool_close(zpool_handle); 3273 return (-1); 3274 } 3275 zpool_close(zpool_handle); 3276 3277 if (type == ZFS_TYPE_VOLUME) { 3278 /* 3279 * If we are creating a volume, the size and block size must 3280 * satisfy a few restraints. First, the blocksize must be a 3281 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3282 * volsize must be a multiple of the block size, and cannot be 3283 * zero. 3284 */ 3285 if (props == NULL || nvlist_lookup_uint64(props, 3286 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3287 nvlist_free(props); 3288 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3289 "missing volume size")); 3290 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3291 } 3292 3293 if ((ret = nvlist_lookup_uint64(props, 3294 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3295 &blocksize)) != 0) { 3296 if (ret == ENOENT) { 3297 blocksize = zfs_prop_default_numeric( 3298 ZFS_PROP_VOLBLOCKSIZE); 3299 } else { 3300 nvlist_free(props); 3301 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3302 "missing volume block size")); 3303 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3304 } 3305 } 3306 3307 if (size == 0) { 3308 nvlist_free(props); 3309 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3310 "volume size cannot be zero")); 3311 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3312 } 3313 3314 if (size % blocksize != 0) { 3315 nvlist_free(props); 3316 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3317 "volume size must be a multiple of volume block " 3318 "size")); 3319 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3320 } 3321 } 3322 3323 /* create the dataset */ 3324 ret = lzc_create(path, ost, props); 3325 nvlist_free(props); 3326 3327 /* check for failure */ 3328 if (ret != 0) { 3329 char parent[ZFS_MAXNAMELEN]; 3330 (void) parent_name(path, parent, sizeof (parent)); 3331 3332 switch (errno) { 3333 case ENOENT: 3334 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3335 "no such parent '%s'"), parent); 3336 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3337 3338 case EINVAL: 3339 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3340 "parent '%s' is not a filesystem"), parent); 3341 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3342 3343 case ENOTSUP: 3344 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3345 "pool must be upgraded to set this " 3346 "property or value")); 3347 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3348#ifdef _ILP32 3349 case EOVERFLOW: 3350 /* 3351 * This platform can't address a volume this big. 3352 */ 3353 if (type == ZFS_TYPE_VOLUME) 3354 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3355 errbuf)); 3356#endif 3357 /* FALLTHROUGH */ 3358 default: 3359 return (zfs_standard_error(hdl, errno, errbuf)); 3360 } 3361 } 3362 3363 return (0); 3364} 3365 3366/* 3367 * Destroys the given dataset. The caller must make sure that the filesystem 3368 * isn't mounted, and that there are no active dependents. If the file system 3369 * does not exist this function does nothing. 3370 */ 3371int 3372zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3373{ 3374 zfs_cmd_t zc = { 0 }; 3375 3376 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3377 nvlist_t *nv = fnvlist_alloc(); 3378 fnvlist_add_boolean(nv, zhp->zfs_name); 3379 int error = lzc_destroy_bookmarks(nv, NULL); 3380 fnvlist_free(nv); 3381 if (error != 0) { 3382 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3383 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3384 zhp->zfs_name)); 3385 } 3386 return (0); 3387 } 3388 3389 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3390 3391 if (ZFS_IS_VOLUME(zhp)) { 3392 zc.zc_objset_type = DMU_OST_ZVOL; 3393 } else { 3394 zc.zc_objset_type = DMU_OST_ZFS; 3395 } 3396 3397 zc.zc_defer_destroy = defer; 3398 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3399 errno != ENOENT) { 3400 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3401 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3402 zhp->zfs_name)); 3403 } 3404 3405 remove_mountpoint(zhp); 3406 3407 return (0); 3408} 3409 3410struct destroydata { 3411 nvlist_t *nvl; 3412 const char *snapname; 3413}; 3414 3415static int 3416zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3417{ 3418 struct destroydata *dd = arg; 3419 char name[ZFS_MAXNAMELEN]; 3420 int rv = 0; 3421 3422 (void) snprintf(name, sizeof (name), 3423 "%s@%s", zhp->zfs_name, dd->snapname); 3424 3425 if (lzc_exists(name)) 3426 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3427 3428 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3429 zfs_close(zhp); 3430 return (rv); 3431} 3432 3433/* 3434 * Destroys all snapshots with the given name in zhp & descendants. 3435 */ 3436int 3437zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3438{ 3439 int ret; 3440 struct destroydata dd = { 0 }; 3441 3442 dd.snapname = snapname; 3443 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3444 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3445 3446 if (nvlist_empty(dd.nvl)) { 3447 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3448 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3449 zhp->zfs_name, snapname); 3450 } else { 3451 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3452 } 3453 nvlist_free(dd.nvl); 3454 return (ret); 3455} 3456 3457/* 3458 * Destroys all the snapshots named in the nvlist. 3459 */ 3460int 3461zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3462{ 3463 int ret; 3464 nvlist_t *errlist; 3465 3466 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3467 3468 if (ret == 0) 3469 return (0); 3470 3471 if (nvlist_empty(errlist)) { 3472 char errbuf[1024]; 3473 (void) snprintf(errbuf, sizeof (errbuf), 3474 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3475 3476 ret = zfs_standard_error(hdl, ret, errbuf); 3477 } 3478 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3479 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3480 char errbuf[1024]; 3481 (void) snprintf(errbuf, sizeof (errbuf), 3482 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3483 nvpair_name(pair)); 3484 3485 switch (fnvpair_value_int32(pair)) { 3486 case EEXIST: 3487 zfs_error_aux(hdl, 3488 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3489 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3490 break; 3491 default: 3492 ret = zfs_standard_error(hdl, errno, errbuf); 3493 break; 3494 } 3495 } 3496 3497 return (ret); 3498} 3499 3500/* 3501 * Clones the given dataset. The target must be of the same type as the source. 3502 */ 3503int 3504zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3505{ 3506 char parent[ZFS_MAXNAMELEN]; 3507 int ret; 3508 char errbuf[1024]; 3509 libzfs_handle_t *hdl = zhp->zfs_hdl; 3510 uint64_t zoned; 3511 3512 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3513 3514 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3515 "cannot create '%s'"), target); 3516 3517 /* validate the target/clone name */ 3518 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3519 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3520 3521 /* validate parents exist */ 3522 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3523 return (-1); 3524 3525 (void) parent_name(target, parent, sizeof (parent)); 3526 3527 /* do the clone */ 3528 3529 if (props) { 3530 zfs_type_t type; 3531 if (ZFS_IS_VOLUME(zhp)) { 3532 type = ZFS_TYPE_VOLUME; 3533 } else { 3534 type = ZFS_TYPE_FILESYSTEM; 3535 } 3536 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3537 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3538 return (-1); 3539 } 3540 3541 ret = lzc_clone(target, zhp->zfs_name, props); 3542 nvlist_free(props); 3543 3544 if (ret != 0) { 3545 switch (errno) { 3546 3547 case ENOENT: 3548 /* 3549 * The parent doesn't exist. We should have caught this 3550 * above, but there may a race condition that has since 3551 * destroyed the parent. 3552 * 3553 * At this point, we don't know whether it's the source 3554 * that doesn't exist anymore, or whether the target 3555 * dataset doesn't exist. 3556 */ 3557 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3558 "no such parent '%s'"), parent); 3559 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3560 3561 case EXDEV: 3562 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3563 "source and target pools differ")); 3564 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3565 errbuf)); 3566 3567 default: 3568 return (zfs_standard_error(zhp->zfs_hdl, errno, 3569 errbuf)); 3570 } 3571 } 3572 3573 return (ret); 3574} 3575 3576/* 3577 * Promotes the given clone fs to be the clone parent. 3578 */ 3579int 3580zfs_promote(zfs_handle_t *zhp) 3581{ 3582 libzfs_handle_t *hdl = zhp->zfs_hdl; 3583 zfs_cmd_t zc = { 0 }; 3584 char parent[MAXPATHLEN]; 3585 int ret; 3586 char errbuf[1024]; 3587 3588 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3589 "cannot promote '%s'"), zhp->zfs_name); 3590 3591 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3592 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3593 "snapshots can not be promoted")); 3594 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3595 } 3596 3597 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3598 if (parent[0] == '\0') { 3599 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3600 "not a cloned filesystem")); 3601 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3602 } 3603 3604 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3605 sizeof (zc.zc_value)); 3606 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3607 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3608 3609 if (ret != 0) { 3610 int save_errno = errno; 3611 3612 switch (save_errno) { 3613 case EEXIST: 3614 /* There is a conflicting snapshot name. */ 3615 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3616 "conflicting snapshot '%s' from parent '%s'"), 3617 zc.zc_string, parent); 3618 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3619 3620 default: 3621 return (zfs_standard_error(hdl, save_errno, errbuf)); 3622 } 3623 } 3624 return (ret); 3625} 3626 3627typedef struct snapdata { 3628 nvlist_t *sd_nvl; 3629 const char *sd_snapname; 3630} snapdata_t; 3631 3632static int 3633zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3634{ 3635 snapdata_t *sd = arg; 3636 char name[ZFS_MAXNAMELEN]; 3637 int rv = 0; 3638 3639 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3640 (void) snprintf(name, sizeof (name), 3641 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3642 3643 fnvlist_add_boolean(sd->sd_nvl, name); 3644 3645 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3646 } 3647 zfs_close(zhp); 3648 3649 return (rv); 3650} 3651 3652/* 3653 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3654 * created. 3655 */ 3656int 3657zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3658{ 3659 int ret; 3660 char errbuf[1024]; 3661 nvpair_t *elem; 3662 nvlist_t *errors; 3663 3664 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3665 "cannot create snapshots ")); 3666 3667 elem = NULL; 3668 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3669 const char *snapname = nvpair_name(elem); 3670 3671 /* validate the target name */ 3672 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3673 B_TRUE)) { 3674 (void) snprintf(errbuf, sizeof (errbuf), 3675 dgettext(TEXT_DOMAIN, 3676 "cannot create snapshot '%s'"), snapname); 3677 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3678 } 3679 } 3680 3681 /* 3682 * get pool handle for prop validation. assumes all snaps are in the 3683 * same pool, as does lzc_snapshot (below). 3684 */ 3685 char pool[MAXNAMELEN]; 3686 elem = nvlist_next_nvpair(snaps, NULL); 3687 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3688 pool[strcspn(pool, "/@")] = '\0'; 3689 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3690 3691 if (props != NULL && 3692 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3693 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3694 zpool_close(zpool_hdl); 3695 return (-1); 3696 } 3697 zpool_close(zpool_hdl); 3698 3699 ret = lzc_snapshot(snaps, props, &errors); 3700 3701 if (ret != 0) { 3702 boolean_t printed = B_FALSE; 3703 for (elem = nvlist_next_nvpair(errors, NULL); 3704 elem != NULL; 3705 elem = nvlist_next_nvpair(errors, elem)) { 3706 (void) snprintf(errbuf, sizeof (errbuf), 3707 dgettext(TEXT_DOMAIN, 3708 "cannot create snapshot '%s'"), nvpair_name(elem)); 3709 (void) zfs_standard_error(hdl, 3710 fnvpair_value_int32(elem), errbuf); 3711 printed = B_TRUE; 3712 } 3713 if (!printed) { 3714 switch (ret) { 3715 case EXDEV: 3716 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3717 "multiple snapshots of same " 3718 "fs not allowed")); 3719 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3720 3721 break; 3722 default: 3723 (void) zfs_standard_error(hdl, ret, errbuf); 3724 } 3725 } 3726 } 3727 3728 nvlist_free(props); 3729 nvlist_free(errors); 3730 return (ret); 3731} 3732 3733int 3734zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3735 nvlist_t *props) 3736{ 3737 int ret; 3738 snapdata_t sd = { 0 }; 3739 char fsname[ZFS_MAXNAMELEN]; 3740 char *cp; 3741 zfs_handle_t *zhp; 3742 char errbuf[1024]; 3743 3744 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3745 "cannot snapshot %s"), path); 3746 3747 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3748 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3749 3750 (void) strlcpy(fsname, path, sizeof (fsname)); 3751 cp = strchr(fsname, '@'); 3752 *cp = '\0'; 3753 sd.sd_snapname = cp + 1; 3754 3755 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3756 ZFS_TYPE_VOLUME)) == NULL) { 3757 return (-1); 3758 } 3759 3760 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3761 if (recursive) { 3762 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3763 } else { 3764 fnvlist_add_boolean(sd.sd_nvl, path); 3765 } 3766 3767 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3768 nvlist_free(sd.sd_nvl); 3769 zfs_close(zhp); 3770 return (ret); 3771} 3772 3773/* 3774 * Destroy any more recent snapshots. We invoke this callback on any dependents 3775 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3776 * is a dependent and we should just destroy it without checking the transaction 3777 * group. 3778 */ 3779typedef struct rollback_data { 3780 const char *cb_target; /* the snapshot */ 3781 uint64_t cb_create; /* creation time reference */ 3782 boolean_t cb_error; 3783 boolean_t cb_force; 3784} rollback_data_t; 3785 3786static int 3787rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3788{ 3789 rollback_data_t *cbp = data; 3790 prop_changelist_t *clp; 3791 3792 /* We must destroy this clone; first unmount it */ 3793 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3794 cbp->cb_force ? MS_FORCE: 0); 3795 if (clp == NULL || changelist_prefix(clp) != 0) { 3796 cbp->cb_error = B_TRUE; 3797 zfs_close(zhp); 3798 return (0); 3799 } 3800 if (zfs_destroy(zhp, B_FALSE) != 0) 3801 cbp->cb_error = B_TRUE; 3802 else 3803 changelist_remove(clp, zhp->zfs_name); 3804 (void) changelist_postfix(clp); 3805 changelist_free(clp); 3806 3807 zfs_close(zhp); 3808 return (0); 3809} 3810 3811static int 3812rollback_destroy(zfs_handle_t *zhp, void *data) 3813{ 3814 rollback_data_t *cbp = data; 3815 3816 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3817 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3818 rollback_destroy_dependent, cbp); 3819 3820 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3821 } 3822 3823 zfs_close(zhp); 3824 return (0); 3825} 3826 3827/* 3828 * Given a dataset, rollback to a specific snapshot, discarding any 3829 * data changes since then and making it the active dataset. 3830 * 3831 * Any snapshots and bookmarks more recent than the target are 3832 * destroyed, along with their dependents (i.e. clones). 3833 */ 3834int 3835zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3836{ 3837 rollback_data_t cb = { 0 }; 3838 int err; 3839 boolean_t restore_resv = 0; 3840 uint64_t old_volsize, new_volsize; 3841 zfs_prop_t resv_prop; 3842 3843 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3844 zhp->zfs_type == ZFS_TYPE_VOLUME); 3845 3846 /* 3847 * Destroy all recent snapshots and their dependents. 3848 */ 3849 cb.cb_force = force; 3850 cb.cb_target = snap->zfs_name; 3851 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3852 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3853 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3854 3855 if (cb.cb_error) 3856 return (-1); 3857 3858 /* 3859 * Now that we have verified that the snapshot is the latest, 3860 * rollback to the given snapshot. 3861 */ 3862 3863 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3864 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3865 return (-1); 3866 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3867 restore_resv = 3868 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3869 } 3870 3871 /* 3872 * We rely on zfs_iter_children() to verify that there are no 3873 * newer snapshots for the given dataset. Therefore, we can 3874 * simply pass the name on to the ioctl() call. There is still 3875 * an unlikely race condition where the user has taken a 3876 * snapshot since we verified that this was the most recent. 3877 */ 3878 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3879 if (err != 0) { 3880 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3881 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3882 zhp->zfs_name); 3883 return (err); 3884 } 3885 3886 /* 3887 * For volumes, if the pre-rollback volsize matched the pre- 3888 * rollback reservation and the volsize has changed then set 3889 * the reservation property to the post-rollback volsize. 3890 * Make a new handle since the rollback closed the dataset. 3891 */ 3892 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3893 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3894 if (restore_resv) { 3895 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3896 if (old_volsize != new_volsize) 3897 err = zfs_prop_set_int(zhp, resv_prop, 3898 new_volsize); 3899 } 3900 zfs_close(zhp); 3901 } 3902 return (err); 3903} 3904 3905/* 3906 * Renames the given dataset. 3907 */ 3908int 3909zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3910 renameflags_t flags) 3911{ 3912 int ret; 3913 zfs_cmd_t zc = { 0 }; 3914 char *delim; 3915 prop_changelist_t *cl = NULL; 3916 zfs_handle_t *zhrp = NULL; 3917 char *parentname = NULL; 3918 char parent[ZFS_MAXNAMELEN]; 3919 char property[ZFS_MAXPROPLEN]; 3920 libzfs_handle_t *hdl = zhp->zfs_hdl; 3921 char errbuf[1024]; 3922 3923 /* if we have the same exact name, just return success */ 3924 if (strcmp(zhp->zfs_name, target) == 0) 3925 return (0); 3926 3927 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3928 "cannot rename to '%s'"), target); 3929 3930 if (source != NULL) { 3931 /* 3932 * This is recursive snapshots rename, put snapshot name 3933 * (that might not exist) into zfs_name. 3934 */ 3935 assert(flags.recurse); 3936 3937 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3938 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3939 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3940 } 3941 3942 /* 3943 * Make sure the target name is valid 3944 */ 3945 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3946 if ((strchr(target, '@') == NULL) || 3947 *target == '@') { 3948 /* 3949 * Snapshot target name is abbreviated, 3950 * reconstruct full dataset name 3951 */ 3952 (void) strlcpy(parent, zhp->zfs_name, 3953 sizeof (parent)); 3954 delim = strchr(parent, '@'); 3955 if (strchr(target, '@') == NULL) 3956 *(++delim) = '\0'; 3957 else 3958 *delim = '\0'; 3959 (void) strlcat(parent, target, sizeof (parent)); 3960 target = parent; 3961 } else { 3962 /* 3963 * Make sure we're renaming within the same dataset. 3964 */ 3965 delim = strchr(target, '@'); 3966 if (strncmp(zhp->zfs_name, target, delim - target) 3967 != 0 || zhp->zfs_name[delim - target] != '@') { 3968 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3969 "snapshots must be part of same " 3970 "dataset")); 3971 return (zfs_error(hdl, EZFS_CROSSTARGET, 3972 errbuf)); 3973 } 3974 } 3975 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3976 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3977 } else { 3978 if (flags.recurse) { 3979 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3980 "recursive rename must be a snapshot")); 3981 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3982 } 3983 3984 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3985 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3986 3987 /* validate parents */ 3988 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3989 return (-1); 3990 3991 /* make sure we're in the same pool */ 3992 verify((delim = strchr(target, '/')) != NULL); 3993 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3994 zhp->zfs_name[delim - target] != '/') { 3995 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3996 "datasets must be within same pool")); 3997 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3998 } 3999 4000 /* new name cannot be a child of the current dataset name */ 4001 if (is_descendant(zhp->zfs_name, target)) { 4002 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4003 "New dataset name cannot be a descendant of " 4004 "current dataset name")); 4005 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4006 } 4007 } 4008 4009 (void) snprintf(errbuf, sizeof (errbuf), 4010 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4011 4012 if (getzoneid() == GLOBAL_ZONEID && 4013 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4014 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4015 "dataset is used in a non-global zone")); 4016 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4017 } 4018 4019 /* 4020 * Avoid unmounting file systems with mountpoint property set to 4021 * 'legacy' or 'none' even if -u option is not given. 4022 */ 4023 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4024 !flags.recurse && !flags.nounmount && 4025 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4026 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4027 (strcmp(property, "legacy") == 0 || 4028 strcmp(property, "none") == 0)) { 4029 flags.nounmount = B_TRUE; 4030 } 4031 if (flags.recurse) { 4032 4033 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4034 if (parentname == NULL) { 4035 ret = -1; 4036 goto error; 4037 } 4038 delim = strchr(parentname, '@'); 4039 *delim = '\0'; 4040 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4041 if (zhrp == NULL) { 4042 ret = -1; 4043 goto error; 4044 } 4045 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4046 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4047 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4048 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4049 return (-1); 4050 } 4051 4052 if (changelist_haszonedchild(cl)) { 4053 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4054 "child dataset with inherited mountpoint is used " 4055 "in a non-global zone")); 4056 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4057 goto error; 4058 } 4059 4060 if ((ret = changelist_prefix(cl)) != 0) 4061 goto error; 4062 } 4063 4064 if (ZFS_IS_VOLUME(zhp)) 4065 zc.zc_objset_type = DMU_OST_ZVOL; 4066 else 4067 zc.zc_objset_type = DMU_OST_ZFS; 4068 4069 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4070 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4071 4072 zc.zc_cookie = flags.recurse ? 1 : 0; 4073 if (flags.nounmount) 4074 zc.zc_cookie |= 2; 4075 4076 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4077 /* 4078 * if it was recursive, the one that actually failed will 4079 * be in zc.zc_name 4080 */ 4081 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4082 "cannot rename '%s'"), zc.zc_name); 4083 4084 if (flags.recurse && errno == EEXIST) { 4085 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4086 "a child dataset already has a snapshot " 4087 "with the new name")); 4088 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4089 } else { 4090 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4091 } 4092 4093 /* 4094 * On failure, we still want to remount any filesystems that 4095 * were previously mounted, so we don't alter the system state. 4096 */ 4097 if (cl != NULL) 4098 (void) changelist_postfix(cl); 4099 } else { 4100 if (cl != NULL) { 4101 changelist_rename(cl, zfs_get_name(zhp), target); 4102 ret = changelist_postfix(cl); 4103 } 4104 } 4105 4106error: 4107 if (parentname != NULL) { 4108 free(parentname); 4109 } 4110 if (zhrp != NULL) { 4111 zfs_close(zhrp); 4112 } 4113 if (cl != NULL) { 4114 changelist_free(cl); 4115 } 4116 return (ret); 4117} 4118 4119nvlist_t * 4120zfs_get_user_props(zfs_handle_t *zhp) 4121{ 4122 return (zhp->zfs_user_props); 4123} 4124 4125nvlist_t * 4126zfs_get_recvd_props(zfs_handle_t *zhp) 4127{ 4128 if (zhp->zfs_recvd_props == NULL) 4129 if (get_recvd_props_ioctl(zhp) != 0) 4130 return (NULL); 4131 return (zhp->zfs_recvd_props); 4132} 4133 4134/* 4135 * This function is used by 'zfs list' to determine the exact set of columns to 4136 * display, and their maximum widths. This does two main things: 4137 * 4138 * - If this is a list of all properties, then expand the list to include 4139 * all native properties, and set a flag so that for each dataset we look 4140 * for new unique user properties and add them to the list. 4141 * 4142 * - For non fixed-width properties, keep track of the maximum width seen 4143 * so that we can size the column appropriately. If the user has 4144 * requested received property values, we also need to compute the width 4145 * of the RECEIVED column. 4146 */ 4147int 4148zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4149 boolean_t literal) 4150{ 4151 libzfs_handle_t *hdl = zhp->zfs_hdl; 4152 zprop_list_t *entry; 4153 zprop_list_t **last, **start; 4154 nvlist_t *userprops, *propval; 4155 nvpair_t *elem; 4156 char *strval; 4157 char buf[ZFS_MAXPROPLEN]; 4158 4159 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4160 return (-1); 4161 4162 userprops = zfs_get_user_props(zhp); 4163 4164 entry = *plp; 4165 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4166 /* 4167 * Go through and add any user properties as necessary. We 4168 * start by incrementing our list pointer to the first 4169 * non-native property. 4170 */ 4171 start = plp; 4172 while (*start != NULL) { 4173 if ((*start)->pl_prop == ZPROP_INVAL) 4174 break; 4175 start = &(*start)->pl_next; 4176 } 4177 4178 elem = NULL; 4179 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4180 /* 4181 * See if we've already found this property in our list. 4182 */ 4183 for (last = start; *last != NULL; 4184 last = &(*last)->pl_next) { 4185 if (strcmp((*last)->pl_user_prop, 4186 nvpair_name(elem)) == 0) 4187 break; 4188 } 4189 4190 if (*last == NULL) { 4191 if ((entry = zfs_alloc(hdl, 4192 sizeof (zprop_list_t))) == NULL || 4193 ((entry->pl_user_prop = zfs_strdup(hdl, 4194 nvpair_name(elem)))) == NULL) { 4195 free(entry); 4196 return (-1); 4197 } 4198 4199 entry->pl_prop = ZPROP_INVAL; 4200 entry->pl_width = strlen(nvpair_name(elem)); 4201 entry->pl_all = B_TRUE; 4202 *last = entry; 4203 } 4204 } 4205 } 4206 4207 /* 4208 * Now go through and check the width of any non-fixed columns 4209 */ 4210 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4211 if (entry->pl_fixed && !literal) 4212 continue; 4213 4214 if (entry->pl_prop != ZPROP_INVAL) { 4215 if (zfs_prop_get(zhp, entry->pl_prop, 4216 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4217 if (strlen(buf) > entry->pl_width) 4218 entry->pl_width = strlen(buf); 4219 } 4220 if (received && zfs_prop_get_recvd(zhp, 4221 zfs_prop_to_name(entry->pl_prop), 4222 buf, sizeof (buf), literal) == 0) 4223 if (strlen(buf) > entry->pl_recvd_width) 4224 entry->pl_recvd_width = strlen(buf); 4225 } else { 4226 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4227 &propval) == 0) { 4228 verify(nvlist_lookup_string(propval, 4229 ZPROP_VALUE, &strval) == 0); 4230 if (strlen(strval) > entry->pl_width) 4231 entry->pl_width = strlen(strval); 4232 } 4233 if (received && zfs_prop_get_recvd(zhp, 4234 entry->pl_user_prop, 4235 buf, sizeof (buf), literal) == 0) 4236 if (strlen(buf) > entry->pl_recvd_width) 4237 entry->pl_recvd_width = strlen(buf); 4238 } 4239 } 4240 4241 return (0); 4242} 4243 4244int 4245zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4246 char *resource, void *export, void *sharetab, 4247 int sharemax, zfs_share_op_t operation) 4248{ 4249 zfs_cmd_t zc = { 0 }; 4250 int error; 4251 4252 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4253 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4254 if (resource) 4255 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4256 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4257 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4258 zc.zc_share.z_sharetype = operation; 4259 zc.zc_share.z_sharemax = sharemax; 4260 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4261 return (error); 4262} 4263 4264void 4265zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4266{ 4267 nvpair_t *curr; 4268 4269 /* 4270 * Keep a reference to the props-table against which we prune the 4271 * properties. 4272 */ 4273 zhp->zfs_props_table = props; 4274 4275 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4276 4277 while (curr) { 4278 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4279 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4280 4281 /* 4282 * User properties will result in ZPROP_INVAL, and since we 4283 * only know how to prune standard ZFS properties, we always 4284 * leave these in the list. This can also happen if we 4285 * encounter an unknown DSL property (when running older 4286 * software, for example). 4287 */ 4288 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4289 (void) nvlist_remove(zhp->zfs_props, 4290 nvpair_name(curr), nvpair_type(curr)); 4291 curr = next; 4292 } 4293} 4294 4295#ifdef illumos 4296static int 4297zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4298 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4299{ 4300 zfs_cmd_t zc = { 0 }; 4301 nvlist_t *nvlist = NULL; 4302 int error; 4303 4304 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4305 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4306 zc.zc_cookie = (uint64_t)cmd; 4307 4308 if (cmd == ZFS_SMB_ACL_RENAME) { 4309 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4310 (void) no_memory(hdl); 4311 return (0); 4312 } 4313 } 4314 4315 switch (cmd) { 4316 case ZFS_SMB_ACL_ADD: 4317 case ZFS_SMB_ACL_REMOVE: 4318 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4319 break; 4320 case ZFS_SMB_ACL_RENAME: 4321 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4322 resource1) != 0) { 4323 (void) no_memory(hdl); 4324 return (-1); 4325 } 4326 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4327 resource2) != 0) { 4328 (void) no_memory(hdl); 4329 return (-1); 4330 } 4331 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4332 nvlist_free(nvlist); 4333 return (-1); 4334 } 4335 break; 4336 case ZFS_SMB_ACL_PURGE: 4337 break; 4338 default: 4339 return (-1); 4340 } 4341 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4342 nvlist_free(nvlist); 4343 return (error); 4344} 4345 4346int 4347zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4348 char *path, char *resource) 4349{ 4350 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4351 resource, NULL)); 4352} 4353 4354int 4355zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4356 char *path, char *resource) 4357{ 4358 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4359 resource, NULL)); 4360} 4361 4362int 4363zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4364{ 4365 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4366 NULL, NULL)); 4367} 4368 4369int 4370zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4371 char *oldname, char *newname) 4372{ 4373 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4374 oldname, newname)); 4375} 4376#endif /* illumos */ 4377 4378int 4379zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4380 zfs_userspace_cb_t func, void *arg) 4381{ 4382 zfs_cmd_t zc = { 0 }; 4383 zfs_useracct_t buf[100]; 4384 libzfs_handle_t *hdl = zhp->zfs_hdl; 4385 int ret; 4386 4387 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4388 4389 zc.zc_objset_type = type; 4390 zc.zc_nvlist_dst = (uintptr_t)buf; 4391 4392 for (;;) { 4393 zfs_useracct_t *zua = buf; 4394 4395 zc.zc_nvlist_dst_size = sizeof (buf); 4396 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4397 char errbuf[1024]; 4398 4399 (void) snprintf(errbuf, sizeof (errbuf), 4400 dgettext(TEXT_DOMAIN, 4401 "cannot get used/quota for %s"), zc.zc_name); 4402 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4403 } 4404 if (zc.zc_nvlist_dst_size == 0) 4405 break; 4406 4407 while (zc.zc_nvlist_dst_size > 0) { 4408 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4409 zua->zu_space)) != 0) 4410 return (ret); 4411 zua++; 4412 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4413 } 4414 } 4415 4416 return (0); 4417} 4418 4419struct holdarg { 4420 nvlist_t *nvl; 4421 const char *snapname; 4422 const char *tag; 4423 boolean_t recursive; 4424 int error; 4425}; 4426 4427static int 4428zfs_hold_one(zfs_handle_t *zhp, void *arg) 4429{ 4430 struct holdarg *ha = arg; 4431 char name[ZFS_MAXNAMELEN]; 4432 int rv = 0; 4433 4434 (void) snprintf(name, sizeof (name), 4435 "%s@%s", zhp->zfs_name, ha->snapname); 4436 4437 if (lzc_exists(name)) 4438 fnvlist_add_string(ha->nvl, name, ha->tag); 4439 4440 if (ha->recursive) 4441 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4442 zfs_close(zhp); 4443 return (rv); 4444} 4445 4446int 4447zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4448 boolean_t recursive, int cleanup_fd) 4449{ 4450 int ret; 4451 struct holdarg ha; 4452 4453 ha.nvl = fnvlist_alloc(); 4454 ha.snapname = snapname; 4455 ha.tag = tag; 4456 ha.recursive = recursive; 4457 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4458 4459 if (nvlist_empty(ha.nvl)) { 4460 char errbuf[1024]; 4461 4462 fnvlist_free(ha.nvl); 4463 ret = ENOENT; 4464 (void) snprintf(errbuf, sizeof (errbuf), 4465 dgettext(TEXT_DOMAIN, 4466 "cannot hold snapshot '%s@%s'"), 4467 zhp->zfs_name, snapname); 4468 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4469 return (ret); 4470 } 4471 4472 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4473 fnvlist_free(ha.nvl); 4474 4475 return (ret); 4476} 4477 4478int 4479zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4480{ 4481 int ret; 4482 nvlist_t *errors; 4483 libzfs_handle_t *hdl = zhp->zfs_hdl; 4484 char errbuf[1024]; 4485 nvpair_t *elem; 4486 4487 errors = NULL; 4488 ret = lzc_hold(holds, cleanup_fd, &errors); 4489 4490 if (ret == 0) { 4491 /* There may be errors even in the success case. */ 4492 fnvlist_free(errors); 4493 return (0); 4494 } 4495 4496 if (nvlist_empty(errors)) { 4497 /* no hold-specific errors */ 4498 (void) snprintf(errbuf, sizeof (errbuf), 4499 dgettext(TEXT_DOMAIN, "cannot hold")); 4500 switch (ret) { 4501 case ENOTSUP: 4502 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4503 "pool must be upgraded")); 4504 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4505 break; 4506 case EINVAL: 4507 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4508 break; 4509 default: 4510 (void) zfs_standard_error(hdl, ret, errbuf); 4511 } 4512 } 4513 4514 for (elem = nvlist_next_nvpair(errors, NULL); 4515 elem != NULL; 4516 elem = nvlist_next_nvpair(errors, elem)) { 4517 (void) snprintf(errbuf, sizeof (errbuf), 4518 dgettext(TEXT_DOMAIN, 4519 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4520 switch (fnvpair_value_int32(elem)) { 4521 case E2BIG: 4522 /* 4523 * Temporary tags wind up having the ds object id 4524 * prepended. So even if we passed the length check 4525 * above, it's still possible for the tag to wind 4526 * up being slightly too long. 4527 */ 4528 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4529 break; 4530 case EINVAL: 4531 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4532 break; 4533 case EEXIST: 4534 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4535 break; 4536 default: 4537 (void) zfs_standard_error(hdl, 4538 fnvpair_value_int32(elem), errbuf); 4539 } 4540 } 4541 4542 fnvlist_free(errors); 4543 return (ret); 4544} 4545 4546static int 4547zfs_release_one(zfs_handle_t *zhp, void *arg) 4548{ 4549 struct holdarg *ha = arg; 4550 char name[ZFS_MAXNAMELEN]; 4551 int rv = 0; 4552 nvlist_t *existing_holds; 4553 4554 (void) snprintf(name, sizeof (name), 4555 "%s@%s", zhp->zfs_name, ha->snapname); 4556 4557 if (lzc_get_holds(name, &existing_holds) != 0) { 4558 ha->error = ENOENT; 4559 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4560 ha->error = ESRCH; 4561 } else { 4562 nvlist_t *torelease = fnvlist_alloc(); 4563 fnvlist_add_boolean(torelease, ha->tag); 4564 fnvlist_add_nvlist(ha->nvl, name, torelease); 4565 fnvlist_free(torelease); 4566 } 4567 4568 if (ha->recursive) 4569 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4570 zfs_close(zhp); 4571 return (rv); 4572} 4573 4574int 4575zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4576 boolean_t recursive) 4577{ 4578 int ret; 4579 struct holdarg ha; 4580 nvlist_t *errors = NULL; 4581 nvpair_t *elem; 4582 libzfs_handle_t *hdl = zhp->zfs_hdl; 4583 char errbuf[1024]; 4584 4585 ha.nvl = fnvlist_alloc(); 4586 ha.snapname = snapname; 4587 ha.tag = tag; 4588 ha.recursive = recursive; 4589 ha.error = 0; 4590 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4591 4592 if (nvlist_empty(ha.nvl)) { 4593 fnvlist_free(ha.nvl); 4594 ret = ha.error; 4595 (void) snprintf(errbuf, sizeof (errbuf), 4596 dgettext(TEXT_DOMAIN, 4597 "cannot release hold from snapshot '%s@%s'"), 4598 zhp->zfs_name, snapname); 4599 if (ret == ESRCH) { 4600 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4601 } else { 4602 (void) zfs_standard_error(hdl, ret, errbuf); 4603 } 4604 return (ret); 4605 } 4606 4607 ret = lzc_release(ha.nvl, &errors); 4608 fnvlist_free(ha.nvl); 4609 4610 if (ret == 0) { 4611 /* There may be errors even in the success case. */ 4612 fnvlist_free(errors); 4613 return (0); 4614 } 4615 4616 if (nvlist_empty(errors)) { 4617 /* no hold-specific errors */ 4618 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4619 "cannot release")); 4620 switch (errno) { 4621 case ENOTSUP: 4622 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4623 "pool must be upgraded")); 4624 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4625 break; 4626 default: 4627 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4628 } 4629 } 4630 4631 for (elem = nvlist_next_nvpair(errors, NULL); 4632 elem != NULL; 4633 elem = nvlist_next_nvpair(errors, elem)) { 4634 (void) snprintf(errbuf, sizeof (errbuf), 4635 dgettext(TEXT_DOMAIN, 4636 "cannot release hold from snapshot '%s'"), 4637 nvpair_name(elem)); 4638 switch (fnvpair_value_int32(elem)) { 4639 case ESRCH: 4640 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4641 break; 4642 case EINVAL: 4643 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4644 break; 4645 default: 4646 (void) zfs_standard_error_fmt(hdl, 4647 fnvpair_value_int32(elem), errbuf); 4648 } 4649 } 4650 4651 fnvlist_free(errors); 4652 return (ret); 4653} 4654 4655int 4656zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4657{ 4658 zfs_cmd_t zc = { 0 }; 4659 libzfs_handle_t *hdl = zhp->zfs_hdl; 4660 int nvsz = 2048; 4661 void *nvbuf; 4662 int err = 0; 4663 char errbuf[1024]; 4664 4665 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4666 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4667 4668tryagain: 4669 4670 nvbuf = malloc(nvsz); 4671 if (nvbuf == NULL) { 4672 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4673 goto out; 4674 } 4675 4676 zc.zc_nvlist_dst_size = nvsz; 4677 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4678 4679 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN); 4680 4681 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4682 (void) snprintf(errbuf, sizeof (errbuf), 4683 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4684 zc.zc_name); 4685 switch (errno) { 4686 case ENOMEM: 4687 free(nvbuf); 4688 nvsz = zc.zc_nvlist_dst_size; 4689 goto tryagain; 4690 4691 case ENOTSUP: 4692 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4693 "pool must be upgraded")); 4694 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4695 break; 4696 case EINVAL: 4697 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4698 break; 4699 case ENOENT: 4700 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4701 break; 4702 default: 4703 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4704 break; 4705 } 4706 } else { 4707 /* success */ 4708 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4709 if (rc) { 4710 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4711 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4712 zc.zc_name); 4713 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4714 } 4715 } 4716 4717 free(nvbuf); 4718out: 4719 return (err); 4720} 4721 4722int 4723zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4724{ 4725 zfs_cmd_t zc = { 0 }; 4726 libzfs_handle_t *hdl = zhp->zfs_hdl; 4727 char *nvbuf; 4728 char errbuf[1024]; 4729 size_t nvsz; 4730 int err; 4731 4732 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4733 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4734 4735 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4736 assert(err == 0); 4737 4738 nvbuf = malloc(nvsz); 4739 4740 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4741 assert(err == 0); 4742 4743 zc.zc_nvlist_src_size = nvsz; 4744 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4745 zc.zc_perm_action = un; 4746 4747 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4748 4749 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4750 (void) snprintf(errbuf, sizeof (errbuf), 4751 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4752 zc.zc_name); 4753 switch (errno) { 4754 case ENOTSUP: 4755 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4756 "pool must be upgraded")); 4757 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4758 break; 4759 case EINVAL: 4760 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4761 break; 4762 case ENOENT: 4763 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4764 break; 4765 default: 4766 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4767 break; 4768 } 4769 } 4770 4771 free(nvbuf); 4772 4773 return (err); 4774} 4775 4776int 4777zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4778{ 4779 int err; 4780 char errbuf[1024]; 4781 4782 err = lzc_get_holds(zhp->zfs_name, nvl); 4783 4784 if (err != 0) { 4785 libzfs_handle_t *hdl = zhp->zfs_hdl; 4786 4787 (void) snprintf(errbuf, sizeof (errbuf), 4788 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4789 zhp->zfs_name); 4790 switch (err) { 4791 case ENOTSUP: 4792 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4793 "pool must be upgraded")); 4794 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4795 break; 4796 case EINVAL: 4797 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4798 break; 4799 case ENOENT: 4800 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4801 break; 4802 default: 4803 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4804 break; 4805 } 4806 } 4807 4808 return (err); 4809} 4810 4811/* 4812 * Convert the zvol's volume size to an appropriate reservation. 4813 * Note: If this routine is updated, it is necessary to update the ZFS test 4814 * suite's shell version in reservation.kshlib. 4815 */ 4816uint64_t 4817zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4818{ 4819 uint64_t numdb; 4820 uint64_t nblocks, volblocksize; 4821 int ncopies; 4822 char *strval; 4823 4824 if (nvlist_lookup_string(props, 4825 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4826 ncopies = atoi(strval); 4827 else 4828 ncopies = 1; 4829 if (nvlist_lookup_uint64(props, 4830 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4831 &volblocksize) != 0) 4832 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4833 nblocks = volsize/volblocksize; 4834 /* start with metadnode L0-L6 */ 4835 numdb = 7; 4836 /* calculate number of indirects */ 4837 while (nblocks > 1) { 4838 nblocks += DNODES_PER_LEVEL - 1; 4839 nblocks /= DNODES_PER_LEVEL; 4840 numdb += nblocks; 4841 } 4842 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4843 volsize *= ncopies; 4844 /* 4845 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4846 * compressed, but in practice they compress down to about 4847 * 1100 bytes 4848 */ 4849 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4850 volsize += numdb; 4851 return (volsize); 4852} 4853 4854/* 4855 * Attach/detach the given filesystem to/from the given jail. 4856 */ 4857int 4858zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4859{ 4860 libzfs_handle_t *hdl = zhp->zfs_hdl; 4861 zfs_cmd_t zc = { 0 }; 4862 char errbuf[1024]; 4863 unsigned long cmd; 4864 int ret; 4865 4866 if (attach) { 4867 (void) snprintf(errbuf, sizeof (errbuf), 4868 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4869 } else { 4870 (void) snprintf(errbuf, sizeof (errbuf), 4871 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4872 } 4873 4874 switch (zhp->zfs_type) { 4875 case ZFS_TYPE_VOLUME: 4876 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4877 "volumes can not be jailed")); 4878 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4879 case ZFS_TYPE_SNAPSHOT: 4880 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4881 "snapshots can not be jailed")); 4882 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4883 } 4884 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4885 4886 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4887 zc.zc_objset_type = DMU_OST_ZFS; 4888 zc.zc_jailid = jailid; 4889 4890 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4891 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4892 zfs_standard_error(hdl, errno, errbuf); 4893 4894 return (ret); 4895} 4896