libzfs_dataset.c revision 298472
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 E2BIG: 1488 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1489 "property value too long")); 1490 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1491 break; 1492 1493 case ENOTSUP: 1494 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1495 "pool and or dataset must be upgraded to set this " 1496 "property or value")); 1497 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1498 break; 1499 1500 case ERANGE: 1501 case EDOM: 1502 if (prop == ZFS_PROP_COMPRESSION || 1503 prop == ZFS_PROP_RECORDSIZE) { 1504 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1505 "property setting is not allowed on " 1506 "bootable datasets")); 1507 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1508 } else if (prop == ZFS_PROP_CHECKSUM || 1509 prop == ZFS_PROP_DEDUP) { 1510 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1511 "property setting is not allowed on " 1512 "root pools")); 1513 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1514 } else { 1515 (void) zfs_standard_error(hdl, err, errbuf); 1516 } 1517 break; 1518 1519 case EINVAL: 1520 if (prop == ZPROP_INVAL) { 1521 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1522 } else { 1523 (void) zfs_standard_error(hdl, err, errbuf); 1524 } 1525 break; 1526 1527 case EOVERFLOW: 1528 /* 1529 * This platform can't address a volume this big. 1530 */ 1531#ifdef _ILP32 1532 if (prop == ZFS_PROP_VOLSIZE) { 1533 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1534 break; 1535 } 1536#endif 1537 /* FALLTHROUGH */ 1538 default: 1539 (void) zfs_standard_error(hdl, err, errbuf); 1540 } 1541} 1542 1543/* 1544 * Given a property name and value, set the property for the given dataset. 1545 */ 1546int 1547zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1548{ 1549 int ret = -1; 1550 char errbuf[1024]; 1551 libzfs_handle_t *hdl = zhp->zfs_hdl; 1552 nvlist_t *nvl = NULL; 1553 1554 (void) snprintf(errbuf, sizeof (errbuf), 1555 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1556 zhp->zfs_name); 1557 1558 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1559 nvlist_add_string(nvl, propname, propval) != 0) { 1560 (void) no_memory(hdl); 1561 goto error; 1562 } 1563 1564 ret = zfs_prop_set_list(zhp, nvl); 1565 1566error: 1567 nvlist_free(nvl); 1568 return (ret); 1569} 1570 1571 1572 1573/* 1574 * Given an nvlist of property names and values, set the properties for the 1575 * given dataset. 1576 */ 1577int 1578zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1579{ 1580 zfs_cmd_t zc = { 0 }; 1581 int ret = -1; 1582 prop_changelist_t **cls = NULL; 1583 int cl_idx; 1584 char errbuf[1024]; 1585 libzfs_handle_t *hdl = zhp->zfs_hdl; 1586 nvlist_t *nvl; 1587 int nvl_len; 1588 int added_resv; 1589 1590 (void) snprintf(errbuf, sizeof (errbuf), 1591 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1592 zhp->zfs_name); 1593 1594 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1595 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1596 errbuf)) == NULL) 1597 goto error; 1598 1599 /* 1600 * We have to check for any extra properties which need to be added 1601 * before computing the length of the nvlist. 1602 */ 1603 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1604 elem != NULL; 1605 elem = nvlist_next_nvpair(nvl, elem)) { 1606 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1607 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1608 goto error; 1609 } 1610 } 1611 /* 1612 * Check how many properties we're setting and allocate an array to 1613 * store changelist pointers for postfix(). 1614 */ 1615 nvl_len = 0; 1616 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1617 elem != NULL; 1618 elem = nvlist_next_nvpair(nvl, elem)) 1619 nvl_len++; 1620 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1621 goto error; 1622 1623 cl_idx = 0; 1624 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1625 elem != NULL; 1626 elem = nvlist_next_nvpair(nvl, elem)) { 1627 1628 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1629 1630 assert(cl_idx < nvl_len); 1631 /* 1632 * We don't want to unmount & remount the dataset when changing 1633 * its canmount property to 'on' or 'noauto'. We only use 1634 * the changelist logic to unmount when setting canmount=off. 1635 */ 1636 if (prop != ZFS_PROP_CANMOUNT || 1637 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1638 zfs_is_mounted(zhp, NULL))) { 1639 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1640 if (cls[cl_idx] == NULL) 1641 goto error; 1642 } 1643 1644 if (prop == ZFS_PROP_MOUNTPOINT && 1645 changelist_haszonedchild(cls[cl_idx])) { 1646 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1647 "child dataset with inherited mountpoint is used " 1648 "in a non-global zone")); 1649 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1650 goto error; 1651 } 1652 1653 /* We don't support those properties on FreeBSD. */ 1654 switch (prop) { 1655 case ZFS_PROP_DEVICES: 1656 case ZFS_PROP_ISCSIOPTIONS: 1657 case ZFS_PROP_XATTR: 1658 case ZFS_PROP_VSCAN: 1659 case ZFS_PROP_NBMAND: 1660 case ZFS_PROP_MLSLABEL: 1661 (void) snprintf(errbuf, sizeof (errbuf), 1662 "property '%s' not supported on FreeBSD", 1663 nvpair_name(elem)); 1664 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1665 goto error; 1666 } 1667 1668 if (cls[cl_idx] != NULL && 1669 (ret = changelist_prefix(cls[cl_idx])) != 0) 1670 goto error; 1671 1672 cl_idx++; 1673 } 1674 assert(cl_idx == nvl_len); 1675 1676 /* 1677 * Execute the corresponding ioctl() to set this list of properties. 1678 */ 1679 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1680 1681 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1682 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1683 goto error; 1684 1685 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1686 1687 if (ret != 0) { 1688 /* Get the list of unset properties back and report them. */ 1689 nvlist_t *errorprops = NULL; 1690 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1691 goto error; 1692 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1693 elem != NULL; 1694 elem = nvlist_next_nvpair(nvl, elem)) { 1695 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1696 zfs_setprop_error(hdl, prop, errno, errbuf); 1697 } 1698 nvlist_free(errorprops); 1699 1700 if (added_resv && errno == ENOSPC) { 1701 /* clean up the volsize property we tried to set */ 1702 uint64_t old_volsize = zfs_prop_get_int(zhp, 1703 ZFS_PROP_VOLSIZE); 1704 nvlist_free(nvl); 1705 nvl = NULL; 1706 zcmd_free_nvlists(&zc); 1707 1708 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1709 goto error; 1710 if (nvlist_add_uint64(nvl, 1711 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1712 old_volsize) != 0) 1713 goto error; 1714 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1715 goto error; 1716 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1717 } 1718 } else { 1719 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1720 if (cls[cl_idx] != NULL) { 1721 int clp_err = changelist_postfix(cls[cl_idx]); 1722 if (clp_err != 0) 1723 ret = clp_err; 1724 } 1725 } 1726 1727 /* 1728 * Refresh the statistics so the new property value 1729 * is reflected. 1730 */ 1731 if (ret == 0) 1732 (void) get_stats(zhp); 1733 } 1734 1735error: 1736 nvlist_free(nvl); 1737 zcmd_free_nvlists(&zc); 1738 if (cls != NULL) { 1739 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1740 if (cls[cl_idx] != NULL) 1741 changelist_free(cls[cl_idx]); 1742 } 1743 free(cls); 1744 } 1745 return (ret); 1746} 1747 1748/* 1749 * Given a property, inherit the value from the parent dataset, or if received 1750 * is TRUE, revert to the received value, if any. 1751 */ 1752int 1753zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1754{ 1755 zfs_cmd_t zc = { 0 }; 1756 int ret; 1757 prop_changelist_t *cl; 1758 libzfs_handle_t *hdl = zhp->zfs_hdl; 1759 char errbuf[1024]; 1760 zfs_prop_t prop; 1761 1762 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1763 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1764 1765 zc.zc_cookie = received; 1766 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1767 /* 1768 * For user properties, the amount of work we have to do is very 1769 * small, so just do it here. 1770 */ 1771 if (!zfs_prop_user(propname)) { 1772 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1773 "invalid property")); 1774 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1775 } 1776 1777 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1778 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1779 1780 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1781 return (zfs_standard_error(hdl, errno, errbuf)); 1782 1783 return (0); 1784 } 1785 1786 /* 1787 * Verify that this property is inheritable. 1788 */ 1789 if (zfs_prop_readonly(prop)) 1790 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1791 1792 if (!zfs_prop_inheritable(prop) && !received) 1793 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1794 1795 /* 1796 * Check to see if the value applies to this type 1797 */ 1798 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1799 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1800 1801 /* 1802 * Normalize the name, to get rid of shorthand abbreviations. 1803 */ 1804 propname = zfs_prop_to_name(prop); 1805 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1806 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1807 1808 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1809 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1810 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1811 "dataset is used in a non-global zone")); 1812 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1813 } 1814 1815 /* 1816 * Determine datasets which will be affected by this change, if any. 1817 */ 1818 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1819 return (-1); 1820 1821 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1822 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1823 "child dataset with inherited mountpoint is used " 1824 "in a non-global zone")); 1825 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1826 goto error; 1827 } 1828 1829 if ((ret = changelist_prefix(cl)) != 0) 1830 goto error; 1831 1832 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1833 return (zfs_standard_error(hdl, errno, errbuf)); 1834 } else { 1835 1836 if ((ret = changelist_postfix(cl)) != 0) 1837 goto error; 1838 1839 /* 1840 * Refresh the statistics so the new property is reflected. 1841 */ 1842 (void) get_stats(zhp); 1843 } 1844 1845error: 1846 changelist_free(cl); 1847 return (ret); 1848} 1849 1850/* 1851 * True DSL properties are stored in an nvlist. The following two functions 1852 * extract them appropriately. 1853 */ 1854static uint64_t 1855getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1856{ 1857 nvlist_t *nv; 1858 uint64_t value; 1859 1860 *source = NULL; 1861 if (nvlist_lookup_nvlist(zhp->zfs_props, 1862 zfs_prop_to_name(prop), &nv) == 0) { 1863 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1864 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1865 } else { 1866 verify(!zhp->zfs_props_table || 1867 zhp->zfs_props_table[prop] == B_TRUE); 1868 value = zfs_prop_default_numeric(prop); 1869 *source = ""; 1870 } 1871 1872 return (value); 1873} 1874 1875static const char * 1876getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1877{ 1878 nvlist_t *nv; 1879 const char *value; 1880 1881 *source = NULL; 1882 if (nvlist_lookup_nvlist(zhp->zfs_props, 1883 zfs_prop_to_name(prop), &nv) == 0) { 1884 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 1885 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1886 } else { 1887 verify(!zhp->zfs_props_table || 1888 zhp->zfs_props_table[prop] == B_TRUE); 1889 value = zfs_prop_default_string(prop); 1890 *source = ""; 1891 } 1892 1893 return (value); 1894} 1895 1896static boolean_t 1897zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1898{ 1899 return (zhp->zfs_props == zhp->zfs_recvd_props); 1900} 1901 1902static void 1903zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1904{ 1905 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1906 zhp->zfs_props = zhp->zfs_recvd_props; 1907} 1908 1909static void 1910zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1911{ 1912 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1913 *cookie = 0; 1914} 1915 1916/* 1917 * Internal function for getting a numeric property. Both zfs_prop_get() and 1918 * zfs_prop_get_int() are built using this interface. 1919 * 1920 * Certain properties can be overridden using 'mount -o'. In this case, scan 1921 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1922 * If they differ from the on-disk values, report the current values and mark 1923 * the source "temporary". 1924 */ 1925static int 1926get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1927 char **source, uint64_t *val) 1928{ 1929 zfs_cmd_t zc = { 0 }; 1930 nvlist_t *zplprops = NULL; 1931 struct mnttab mnt; 1932 char *mntopt_on = NULL; 1933 char *mntopt_off = NULL; 1934 boolean_t received = zfs_is_recvd_props_mode(zhp); 1935 1936 *source = NULL; 1937 1938 switch (prop) { 1939 case ZFS_PROP_ATIME: 1940 mntopt_on = MNTOPT_ATIME; 1941 mntopt_off = MNTOPT_NOATIME; 1942 break; 1943 1944 case ZFS_PROP_DEVICES: 1945 mntopt_on = MNTOPT_DEVICES; 1946 mntopt_off = MNTOPT_NODEVICES; 1947 break; 1948 1949 case ZFS_PROP_EXEC: 1950 mntopt_on = MNTOPT_EXEC; 1951 mntopt_off = MNTOPT_NOEXEC; 1952 break; 1953 1954 case ZFS_PROP_READONLY: 1955 mntopt_on = MNTOPT_RO; 1956 mntopt_off = MNTOPT_RW; 1957 break; 1958 1959 case ZFS_PROP_SETUID: 1960 mntopt_on = MNTOPT_SETUID; 1961 mntopt_off = MNTOPT_NOSETUID; 1962 break; 1963 1964 case ZFS_PROP_XATTR: 1965 mntopt_on = MNTOPT_XATTR; 1966 mntopt_off = MNTOPT_NOXATTR; 1967 break; 1968 1969 case ZFS_PROP_NBMAND: 1970 mntopt_on = MNTOPT_NBMAND; 1971 mntopt_off = MNTOPT_NONBMAND; 1972 break; 1973 } 1974 1975 /* 1976 * Because looking up the mount options is potentially expensive 1977 * (iterating over all of /etc/mnttab), we defer its calculation until 1978 * we're looking up a property which requires its presence. 1979 */ 1980 if (!zhp->zfs_mntcheck && 1981 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1982 libzfs_handle_t *hdl = zhp->zfs_hdl; 1983 struct mnttab entry; 1984 1985 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1986 zhp->zfs_mntopts = zfs_strdup(hdl, 1987 entry.mnt_mntopts); 1988 if (zhp->zfs_mntopts == NULL) 1989 return (-1); 1990 } 1991 1992 zhp->zfs_mntcheck = B_TRUE; 1993 } 1994 1995 if (zhp->zfs_mntopts == NULL) 1996 mnt.mnt_mntopts = ""; 1997 else 1998 mnt.mnt_mntopts = zhp->zfs_mntopts; 1999 2000 switch (prop) { 2001 case ZFS_PROP_ATIME: 2002 case ZFS_PROP_DEVICES: 2003 case ZFS_PROP_EXEC: 2004 case ZFS_PROP_READONLY: 2005 case ZFS_PROP_SETUID: 2006 case ZFS_PROP_XATTR: 2007 case ZFS_PROP_NBMAND: 2008 *val = getprop_uint64(zhp, prop, source); 2009 2010 if (received) 2011 break; 2012 2013 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2014 *val = B_TRUE; 2015 if (src) 2016 *src = ZPROP_SRC_TEMPORARY; 2017 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2018 *val = B_FALSE; 2019 if (src) 2020 *src = ZPROP_SRC_TEMPORARY; 2021 } 2022 break; 2023 2024 case ZFS_PROP_CANMOUNT: 2025 case ZFS_PROP_VOLSIZE: 2026 case ZFS_PROP_QUOTA: 2027 case ZFS_PROP_REFQUOTA: 2028 case ZFS_PROP_RESERVATION: 2029 case ZFS_PROP_REFRESERVATION: 2030 case ZFS_PROP_FILESYSTEM_LIMIT: 2031 case ZFS_PROP_SNAPSHOT_LIMIT: 2032 case ZFS_PROP_FILESYSTEM_COUNT: 2033 case ZFS_PROP_SNAPSHOT_COUNT: 2034 *val = getprop_uint64(zhp, prop, source); 2035 2036 if (*source == NULL) { 2037 /* not default, must be local */ 2038 *source = zhp->zfs_name; 2039 } 2040 break; 2041 2042 case ZFS_PROP_MOUNTED: 2043 *val = (zhp->zfs_mntopts != NULL); 2044 break; 2045 2046 case ZFS_PROP_NUMCLONES: 2047 *val = zhp->zfs_dmustats.dds_num_clones; 2048 break; 2049 2050 case ZFS_PROP_VERSION: 2051 case ZFS_PROP_NORMALIZE: 2052 case ZFS_PROP_UTF8ONLY: 2053 case ZFS_PROP_CASE: 2054 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2055 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2056 return (-1); 2057 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2058 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2059 zcmd_free_nvlists(&zc); 2060 return (-1); 2061 } 2062 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2063 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2064 val) != 0) { 2065 zcmd_free_nvlists(&zc); 2066 return (-1); 2067 } 2068 nvlist_free(zplprops); 2069 zcmd_free_nvlists(&zc); 2070 break; 2071 2072 case ZFS_PROP_INCONSISTENT: 2073 *val = zhp->zfs_dmustats.dds_inconsistent; 2074 break; 2075 2076 default: 2077 switch (zfs_prop_get_type(prop)) { 2078 case PROP_TYPE_NUMBER: 2079 case PROP_TYPE_INDEX: 2080 *val = getprop_uint64(zhp, prop, source); 2081 /* 2082 * If we tried to use a default value for a 2083 * readonly property, it means that it was not 2084 * present. 2085 */ 2086 if (zfs_prop_readonly(prop) && 2087 *source != NULL && (*source)[0] == '\0') { 2088 *source = NULL; 2089 } 2090 break; 2091 2092 case PROP_TYPE_STRING: 2093 default: 2094 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2095 "cannot get non-numeric property")); 2096 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2097 dgettext(TEXT_DOMAIN, "internal error"))); 2098 } 2099 } 2100 2101 return (0); 2102} 2103 2104/* 2105 * Calculate the source type, given the raw source string. 2106 */ 2107static void 2108get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2109 char *statbuf, size_t statlen) 2110{ 2111 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2112 return; 2113 2114 if (source == NULL) { 2115 *srctype = ZPROP_SRC_NONE; 2116 } else if (source[0] == '\0') { 2117 *srctype = ZPROP_SRC_DEFAULT; 2118 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2119 *srctype = ZPROP_SRC_RECEIVED; 2120 } else { 2121 if (strcmp(source, zhp->zfs_name) == 0) { 2122 *srctype = ZPROP_SRC_LOCAL; 2123 } else { 2124 (void) strlcpy(statbuf, source, statlen); 2125 *srctype = ZPROP_SRC_INHERITED; 2126 } 2127 } 2128 2129} 2130 2131int 2132zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2133 size_t proplen, boolean_t literal) 2134{ 2135 zfs_prop_t prop; 2136 int err = 0; 2137 2138 if (zhp->zfs_recvd_props == NULL) 2139 if (get_recvd_props_ioctl(zhp) != 0) 2140 return (-1); 2141 2142 prop = zfs_name_to_prop(propname); 2143 2144 if (prop != ZPROP_INVAL) { 2145 uint64_t cookie; 2146 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2147 return (-1); 2148 zfs_set_recvd_props_mode(zhp, &cookie); 2149 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2150 NULL, NULL, 0, literal); 2151 zfs_unset_recvd_props_mode(zhp, &cookie); 2152 } else { 2153 nvlist_t *propval; 2154 char *recvdval; 2155 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2156 propname, &propval) != 0) 2157 return (-1); 2158 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2159 &recvdval) == 0); 2160 (void) strlcpy(propbuf, recvdval, proplen); 2161 } 2162 2163 return (err == 0 ? 0 : -1); 2164} 2165 2166static int 2167get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2168{ 2169 nvlist_t *value; 2170 nvpair_t *pair; 2171 2172 value = zfs_get_clones_nvl(zhp); 2173 if (value == NULL) 2174 return (-1); 2175 2176 propbuf[0] = '\0'; 2177 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2178 pair = nvlist_next_nvpair(value, pair)) { 2179 if (propbuf[0] != '\0') 2180 (void) strlcat(propbuf, ",", proplen); 2181 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2182 } 2183 2184 return (0); 2185} 2186 2187struct get_clones_arg { 2188 uint64_t numclones; 2189 nvlist_t *value; 2190 const char *origin; 2191 char buf[ZFS_MAXNAMELEN]; 2192}; 2193 2194int 2195get_clones_cb(zfs_handle_t *zhp, void *arg) 2196{ 2197 struct get_clones_arg *gca = arg; 2198 2199 if (gca->numclones == 0) { 2200 zfs_close(zhp); 2201 return (0); 2202 } 2203 2204 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2205 NULL, NULL, 0, B_TRUE) != 0) 2206 goto out; 2207 if (strcmp(gca->buf, gca->origin) == 0) { 2208 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2209 gca->numclones--; 2210 } 2211 2212out: 2213 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2214 zfs_close(zhp); 2215 return (0); 2216} 2217 2218nvlist_t * 2219zfs_get_clones_nvl(zfs_handle_t *zhp) 2220{ 2221 nvlist_t *nv, *value; 2222 2223 if (nvlist_lookup_nvlist(zhp->zfs_props, 2224 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2225 struct get_clones_arg gca; 2226 2227 /* 2228 * if this is a snapshot, then the kernel wasn't able 2229 * to get the clones. Do it by slowly iterating. 2230 */ 2231 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2232 return (NULL); 2233 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2234 return (NULL); 2235 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2236 nvlist_free(nv); 2237 return (NULL); 2238 } 2239 2240 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2241 gca.value = value; 2242 gca.origin = zhp->zfs_name; 2243 2244 if (gca.numclones != 0) { 2245 zfs_handle_t *root; 2246 char pool[ZFS_MAXNAMELEN]; 2247 char *cp = pool; 2248 2249 /* get the pool name */ 2250 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2251 (void) strsep(&cp, "/@"); 2252 root = zfs_open(zhp->zfs_hdl, pool, 2253 ZFS_TYPE_FILESYSTEM); 2254 2255 (void) get_clones_cb(root, &gca); 2256 } 2257 2258 if (gca.numclones != 0 || 2259 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2260 nvlist_add_nvlist(zhp->zfs_props, 2261 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2262 nvlist_free(nv); 2263 nvlist_free(value); 2264 return (NULL); 2265 } 2266 nvlist_free(nv); 2267 nvlist_free(value); 2268 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2269 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2270 } 2271 2272 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2273 2274 return (value); 2275} 2276 2277/* 2278 * Retrieve a property from the given object. If 'literal' is specified, then 2279 * numbers are left as exact values. Otherwise, numbers are converted to a 2280 * human-readable form. 2281 * 2282 * Returns 0 on success, or -1 on error. 2283 */ 2284int 2285zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2286 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2287{ 2288 char *source = NULL; 2289 uint64_t val; 2290 const char *str; 2291 const char *strval; 2292 boolean_t received = zfs_is_recvd_props_mode(zhp); 2293 2294 /* 2295 * Check to see if this property applies to our object 2296 */ 2297 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2298 return (-1); 2299 2300 if (received && zfs_prop_readonly(prop)) 2301 return (-1); 2302 2303 if (src) 2304 *src = ZPROP_SRC_NONE; 2305 2306 switch (prop) { 2307 case ZFS_PROP_CREATION: 2308 /* 2309 * 'creation' is a time_t stored in the statistics. We convert 2310 * this into a string unless 'literal' is specified. 2311 */ 2312 { 2313 val = getprop_uint64(zhp, prop, &source); 2314 time_t time = (time_t)val; 2315 struct tm t; 2316 2317 if (literal || 2318 localtime_r(&time, &t) == NULL || 2319 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2320 &t) == 0) 2321 (void) snprintf(propbuf, proplen, "%llu", val); 2322 } 2323 break; 2324 2325 case ZFS_PROP_MOUNTPOINT: 2326 /* 2327 * Getting the precise mountpoint can be tricky. 2328 * 2329 * - for 'none' or 'legacy', return those values. 2330 * - for inherited mountpoints, we want to take everything 2331 * after our ancestor and append it to the inherited value. 2332 * 2333 * If the pool has an alternate root, we want to prepend that 2334 * root to any values we return. 2335 */ 2336 2337 str = getprop_string(zhp, prop, &source); 2338 2339 if (str[0] == '/') { 2340 char buf[MAXPATHLEN]; 2341 char *root = buf; 2342 const char *relpath; 2343 2344 /* 2345 * If we inherit the mountpoint, even from a dataset 2346 * with a received value, the source will be the path of 2347 * the dataset we inherit from. If source is 2348 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2349 * inherited. 2350 */ 2351 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2352 relpath = ""; 2353 } else { 2354 relpath = zhp->zfs_name + strlen(source); 2355 if (relpath[0] == '/') 2356 relpath++; 2357 } 2358 2359 if ((zpool_get_prop(zhp->zpool_hdl, 2360 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2361 B_FALSE)) || (strcmp(root, "-") == 0)) 2362 root[0] = '\0'; 2363 /* 2364 * Special case an alternate root of '/'. This will 2365 * avoid having multiple leading slashes in the 2366 * mountpoint path. 2367 */ 2368 if (strcmp(root, "/") == 0) 2369 root++; 2370 2371 /* 2372 * If the mountpoint is '/' then skip over this 2373 * if we are obtaining either an alternate root or 2374 * an inherited mountpoint. 2375 */ 2376 if (str[1] == '\0' && (root[0] != '\0' || 2377 relpath[0] != '\0')) 2378 str++; 2379 2380 if (relpath[0] == '\0') 2381 (void) snprintf(propbuf, proplen, "%s%s", 2382 root, str); 2383 else 2384 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2385 root, str, relpath[0] == '@' ? "" : "/", 2386 relpath); 2387 } else { 2388 /* 'legacy' or 'none' */ 2389 (void) strlcpy(propbuf, str, proplen); 2390 } 2391 2392 break; 2393 2394 case ZFS_PROP_ORIGIN: 2395 str = getprop_string(zhp, prop, &source); 2396 if (str == NULL) 2397 return (-1); 2398 (void) strlcpy(propbuf, str, proplen); 2399 break; 2400 2401 case ZFS_PROP_CLONES: 2402 if (get_clones_string(zhp, propbuf, proplen) != 0) 2403 return (-1); 2404 break; 2405 2406 case ZFS_PROP_QUOTA: 2407 case ZFS_PROP_REFQUOTA: 2408 case ZFS_PROP_RESERVATION: 2409 case ZFS_PROP_REFRESERVATION: 2410 2411 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2412 return (-1); 2413 2414 /* 2415 * If quota or reservation is 0, we translate this into 'none' 2416 * (unless literal is set), and indicate that it's the default 2417 * value. Otherwise, we print the number nicely and indicate 2418 * that its set locally. 2419 */ 2420 if (val == 0) { 2421 if (literal) 2422 (void) strlcpy(propbuf, "0", proplen); 2423 else 2424 (void) strlcpy(propbuf, "none", proplen); 2425 } else { 2426 if (literal) 2427 (void) snprintf(propbuf, proplen, "%llu", 2428 (u_longlong_t)val); 2429 else 2430 zfs_nicenum(val, propbuf, proplen); 2431 } 2432 break; 2433 2434 case ZFS_PROP_FILESYSTEM_LIMIT: 2435 case ZFS_PROP_SNAPSHOT_LIMIT: 2436 case ZFS_PROP_FILESYSTEM_COUNT: 2437 case ZFS_PROP_SNAPSHOT_COUNT: 2438 2439 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2440 return (-1); 2441 2442 /* 2443 * If limit is UINT64_MAX, we translate this into 'none' (unless 2444 * literal is set), and indicate that it's the default value. 2445 * Otherwise, we print the number nicely and indicate that it's 2446 * set locally. 2447 */ 2448 if (literal) { 2449 (void) snprintf(propbuf, proplen, "%llu", 2450 (u_longlong_t)val); 2451 } else if (val == UINT64_MAX) { 2452 (void) strlcpy(propbuf, "none", proplen); 2453 } else { 2454 zfs_nicenum(val, propbuf, proplen); 2455 } 2456 break; 2457 2458 case ZFS_PROP_REFRATIO: 2459 case ZFS_PROP_COMPRESSRATIO: 2460 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2461 return (-1); 2462 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2463 (u_longlong_t)(val / 100), 2464 (u_longlong_t)(val % 100)); 2465 break; 2466 2467 case ZFS_PROP_TYPE: 2468 switch (zhp->zfs_type) { 2469 case ZFS_TYPE_FILESYSTEM: 2470 str = "filesystem"; 2471 break; 2472 case ZFS_TYPE_VOLUME: 2473 str = "volume"; 2474 break; 2475 case ZFS_TYPE_SNAPSHOT: 2476 str = "snapshot"; 2477 break; 2478 case ZFS_TYPE_BOOKMARK: 2479 str = "bookmark"; 2480 break; 2481 default: 2482 abort(); 2483 } 2484 (void) snprintf(propbuf, proplen, "%s", str); 2485 break; 2486 2487 case ZFS_PROP_MOUNTED: 2488 /* 2489 * The 'mounted' property is a pseudo-property that described 2490 * whether the filesystem is currently mounted. Even though 2491 * it's a boolean value, the typical values of "on" and "off" 2492 * don't make sense, so we translate to "yes" and "no". 2493 */ 2494 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2495 src, &source, &val) != 0) 2496 return (-1); 2497 if (val) 2498 (void) strlcpy(propbuf, "yes", proplen); 2499 else 2500 (void) strlcpy(propbuf, "no", proplen); 2501 break; 2502 2503 case ZFS_PROP_NAME: 2504 /* 2505 * The 'name' property is a pseudo-property derived from the 2506 * dataset name. It is presented as a real property to simplify 2507 * consumers. 2508 */ 2509 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2510 break; 2511 2512 case ZFS_PROP_MLSLABEL: 2513 { 2514#ifdef illumos 2515 m_label_t *new_sl = NULL; 2516 char *ascii = NULL; /* human readable label */ 2517 2518 (void) strlcpy(propbuf, 2519 getprop_string(zhp, prop, &source), proplen); 2520 2521 if (literal || (strcasecmp(propbuf, 2522 ZFS_MLSLABEL_DEFAULT) == 0)) 2523 break; 2524 2525 /* 2526 * Try to translate the internal hex string to 2527 * human-readable output. If there are any 2528 * problems just use the hex string. 2529 */ 2530 2531 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2532 L_NO_CORRECTION, NULL) == -1) { 2533 m_label_free(new_sl); 2534 break; 2535 } 2536 2537 if (label_to_str(new_sl, &ascii, M_LABEL, 2538 DEF_NAMES) != 0) { 2539 if (ascii) 2540 free(ascii); 2541 m_label_free(new_sl); 2542 break; 2543 } 2544 m_label_free(new_sl); 2545 2546 (void) strlcpy(propbuf, ascii, proplen); 2547 free(ascii); 2548#else /* !illumos */ 2549 propbuf[0] = '\0'; 2550#endif /* illumos */ 2551 } 2552 break; 2553 2554 case ZFS_PROP_GUID: 2555 /* 2556 * GUIDs are stored as numbers, but they are identifiers. 2557 * We don't want them to be pretty printed, because pretty 2558 * printing mangles the ID into a truncated and useless value. 2559 */ 2560 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2561 return (-1); 2562 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2563 break; 2564 2565 default: 2566 switch (zfs_prop_get_type(prop)) { 2567 case PROP_TYPE_NUMBER: 2568 if (get_numeric_property(zhp, prop, src, 2569 &source, &val) != 0) 2570 return (-1); 2571 if (literal) 2572 (void) snprintf(propbuf, proplen, "%llu", 2573 (u_longlong_t)val); 2574 else 2575 zfs_nicenum(val, propbuf, proplen); 2576 break; 2577 2578 case PROP_TYPE_STRING: 2579 str = getprop_string(zhp, prop, &source); 2580 if (str == NULL) 2581 return (-1); 2582 (void) strlcpy(propbuf, str, proplen); 2583 break; 2584 2585 case PROP_TYPE_INDEX: 2586 if (get_numeric_property(zhp, prop, src, 2587 &source, &val) != 0) 2588 return (-1); 2589 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2590 return (-1); 2591 (void) strlcpy(propbuf, strval, proplen); 2592 break; 2593 2594 default: 2595 abort(); 2596 } 2597 } 2598 2599 get_source(zhp, src, source, statbuf, statlen); 2600 2601 return (0); 2602} 2603 2604/* 2605 * Utility function to get the given numeric property. Does no validation that 2606 * the given property is the appropriate type; should only be used with 2607 * hard-coded property types. 2608 */ 2609uint64_t 2610zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2611{ 2612 char *source; 2613 uint64_t val; 2614 2615 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2616 2617 return (val); 2618} 2619 2620int 2621zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2622{ 2623 char buf[64]; 2624 2625 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2626 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2627} 2628 2629/* 2630 * Similar to zfs_prop_get(), but returns the value as an integer. 2631 */ 2632int 2633zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2634 zprop_source_t *src, char *statbuf, size_t statlen) 2635{ 2636 char *source; 2637 2638 /* 2639 * Check to see if this property applies to our object 2640 */ 2641 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2642 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2643 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2644 zfs_prop_to_name(prop))); 2645 } 2646 2647 if (src) 2648 *src = ZPROP_SRC_NONE; 2649 2650 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2651 return (-1); 2652 2653 get_source(zhp, src, source, statbuf, statlen); 2654 2655 return (0); 2656} 2657 2658static int 2659idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2660 char **domainp, idmap_rid_t *ridp) 2661{ 2662#ifdef illumos 2663 idmap_get_handle_t *get_hdl = NULL; 2664 idmap_stat status; 2665 int err = EINVAL; 2666 2667 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2668 goto out; 2669 2670 if (isuser) { 2671 err = idmap_get_sidbyuid(get_hdl, id, 2672 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2673 } else { 2674 err = idmap_get_sidbygid(get_hdl, id, 2675 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2676 } 2677 if (err == IDMAP_SUCCESS && 2678 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2679 status == IDMAP_SUCCESS) 2680 err = 0; 2681 else 2682 err = EINVAL; 2683out: 2684 if (get_hdl) 2685 idmap_get_destroy(get_hdl); 2686 return (err); 2687#else /* !illumos */ 2688 assert(!"invalid code path"); 2689 return (EINVAL); // silence compiler warning 2690#endif /* illumos */ 2691} 2692 2693/* 2694 * convert the propname into parameters needed by kernel 2695 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2696 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2697 */ 2698static int 2699userquota_propname_decode(const char *propname, boolean_t zoned, 2700 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2701{ 2702 zfs_userquota_prop_t type; 2703 char *cp, *end; 2704 char *numericsid = NULL; 2705 boolean_t isuser; 2706 2707 domain[0] = '\0'; 2708 *ridp = 0; 2709 /* Figure out the property type ({user|group}{quota|space}) */ 2710 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2711 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2712 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2713 break; 2714 } 2715 if (type == ZFS_NUM_USERQUOTA_PROPS) 2716 return (EINVAL); 2717 *typep = type; 2718 2719 isuser = (type == ZFS_PROP_USERQUOTA || 2720 type == ZFS_PROP_USERUSED); 2721 2722 cp = strchr(propname, '@') + 1; 2723 2724 if (strchr(cp, '@')) { 2725#ifdef illumos 2726 /* 2727 * It's a SID name (eg "user@domain") that needs to be 2728 * turned into S-1-domainID-RID. 2729 */ 2730 int flag = 0; 2731 idmap_stat stat, map_stat; 2732 uid_t pid; 2733 idmap_rid_t rid; 2734 idmap_get_handle_t *gh = NULL; 2735 2736 stat = idmap_get_create(&gh); 2737 if (stat != IDMAP_SUCCESS) { 2738 idmap_get_destroy(gh); 2739 return (ENOMEM); 2740 } 2741 if (zoned && getzoneid() == GLOBAL_ZONEID) 2742 return (ENOENT); 2743 if (isuser) { 2744 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2745 if (stat < 0) 2746 return (ENOENT); 2747 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2748 &rid, &map_stat); 2749 } else { 2750 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2751 if (stat < 0) 2752 return (ENOENT); 2753 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2754 &rid, &map_stat); 2755 } 2756 if (stat < 0) { 2757 idmap_get_destroy(gh); 2758 return (ENOENT); 2759 } 2760 stat = idmap_get_mappings(gh); 2761 idmap_get_destroy(gh); 2762 2763 if (stat < 0) { 2764 return (ENOENT); 2765 } 2766 if (numericsid == NULL) 2767 return (ENOENT); 2768 cp = numericsid; 2769 *ridp = rid; 2770 /* will be further decoded below */ 2771#else /* !illumos */ 2772 return (ENOENT); 2773#endif /* illumos */ 2774 } 2775 2776 if (strncmp(cp, "S-1-", 4) == 0) { 2777 /* It's a numeric SID (eg "S-1-234-567-89") */ 2778 (void) strlcpy(domain, cp, domainlen); 2779 errno = 0; 2780 if (*ridp == 0) { 2781 cp = strrchr(domain, '-'); 2782 *cp = '\0'; 2783 cp++; 2784 *ridp = strtoull(cp, &end, 10); 2785 } else { 2786 end = ""; 2787 } 2788 if (numericsid) { 2789 free(numericsid); 2790 numericsid = NULL; 2791 } 2792 if (errno != 0 || *end != '\0') 2793 return (EINVAL); 2794 } else if (!isdigit(*cp)) { 2795 /* 2796 * It's a user/group name (eg "user") that needs to be 2797 * turned into a uid/gid 2798 */ 2799 if (zoned && getzoneid() == GLOBAL_ZONEID) 2800 return (ENOENT); 2801 if (isuser) { 2802 struct passwd *pw; 2803 pw = getpwnam(cp); 2804 if (pw == NULL) 2805 return (ENOENT); 2806 *ridp = pw->pw_uid; 2807 } else { 2808 struct group *gr; 2809 gr = getgrnam(cp); 2810 if (gr == NULL) 2811 return (ENOENT); 2812 *ridp = gr->gr_gid; 2813 } 2814 } else { 2815 /* It's a user/group ID (eg "12345"). */ 2816 uid_t id = strtoul(cp, &end, 10); 2817 idmap_rid_t rid; 2818 char *mapdomain; 2819 2820 if (*end != '\0') 2821 return (EINVAL); 2822 if (id > MAXUID) { 2823 /* It's an ephemeral ID. */ 2824 if (idmap_id_to_numeric_domain_rid(id, isuser, 2825 &mapdomain, &rid) != 0) 2826 return (ENOENT); 2827 (void) strlcpy(domain, mapdomain, domainlen); 2828 *ridp = rid; 2829 } else { 2830 *ridp = id; 2831 } 2832 } 2833 2834 ASSERT3P(numericsid, ==, NULL); 2835 return (0); 2836} 2837 2838static int 2839zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2840 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2841{ 2842 int err; 2843 zfs_cmd_t zc = { 0 }; 2844 2845 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2846 2847 err = userquota_propname_decode(propname, 2848 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2849 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2850 zc.zc_objset_type = *typep; 2851 if (err) 2852 return (err); 2853 2854 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2855 if (err) 2856 return (err); 2857 2858 *propvalue = zc.zc_cookie; 2859 return (0); 2860} 2861 2862int 2863zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2864 uint64_t *propvalue) 2865{ 2866 zfs_userquota_prop_t type; 2867 2868 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2869 &type)); 2870} 2871 2872int 2873zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2874 char *propbuf, int proplen, boolean_t literal) 2875{ 2876 int err; 2877 uint64_t propvalue; 2878 zfs_userquota_prop_t type; 2879 2880 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2881 &type); 2882 2883 if (err) 2884 return (err); 2885 2886 if (literal) { 2887 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2888 } else if (propvalue == 0 && 2889 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2890 (void) strlcpy(propbuf, "none", proplen); 2891 } else { 2892 zfs_nicenum(propvalue, propbuf, proplen); 2893 } 2894 return (0); 2895} 2896 2897int 2898zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2899 uint64_t *propvalue) 2900{ 2901 int err; 2902 zfs_cmd_t zc = { 0 }; 2903 const char *snapname; 2904 2905 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2906 2907 snapname = strchr(propname, '@') + 1; 2908 if (strchr(snapname, '@')) { 2909 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2910 } else { 2911 /* snapname is the short name, append it to zhp's fsname */ 2912 char *cp; 2913 2914 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2915 sizeof (zc.zc_value)); 2916 cp = strchr(zc.zc_value, '@'); 2917 if (cp != NULL) 2918 *cp = '\0'; 2919 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2920 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2921 } 2922 2923 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2924 if (err) 2925 return (err); 2926 2927 *propvalue = zc.zc_cookie; 2928 return (0); 2929} 2930 2931int 2932zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2933 char *propbuf, int proplen, boolean_t literal) 2934{ 2935 int err; 2936 uint64_t propvalue; 2937 2938 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2939 2940 if (err) 2941 return (err); 2942 2943 if (literal) { 2944 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2945 } else { 2946 zfs_nicenum(propvalue, propbuf, proplen); 2947 } 2948 return (0); 2949} 2950 2951/* 2952 * Returns the name of the given zfs handle. 2953 */ 2954const char * 2955zfs_get_name(const zfs_handle_t *zhp) 2956{ 2957 return (zhp->zfs_name); 2958} 2959 2960/* 2961 * Returns the type of the given zfs handle. 2962 */ 2963zfs_type_t 2964zfs_get_type(const zfs_handle_t *zhp) 2965{ 2966 return (zhp->zfs_type); 2967} 2968 2969/* 2970 * Is one dataset name a child dataset of another? 2971 * 2972 * Needs to handle these cases: 2973 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2974 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2975 * Descendant? No. No. No. Yes. 2976 */ 2977static boolean_t 2978is_descendant(const char *ds1, const char *ds2) 2979{ 2980 size_t d1len = strlen(ds1); 2981 2982 /* ds2 can't be a descendant if it's smaller */ 2983 if (strlen(ds2) < d1len) 2984 return (B_FALSE); 2985 2986 /* otherwise, compare strings and verify that there's a '/' char */ 2987 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2988} 2989 2990/* 2991 * Given a complete name, return just the portion that refers to the parent. 2992 * Will return -1 if there is no parent (path is just the name of the 2993 * pool). 2994 */ 2995static int 2996parent_name(const char *path, char *buf, size_t buflen) 2997{ 2998 char *slashp; 2999 3000 (void) strlcpy(buf, path, buflen); 3001 3002 if ((slashp = strrchr(buf, '/')) == NULL) 3003 return (-1); 3004 *slashp = '\0'; 3005 3006 return (0); 3007} 3008 3009/* 3010 * If accept_ancestor is false, then check to make sure that the given path has 3011 * a parent, and that it exists. If accept_ancestor is true, then find the 3012 * closest existing ancestor for the given path. In prefixlen return the 3013 * length of already existing prefix of the given path. We also fetch the 3014 * 'zoned' property, which is used to validate property settings when creating 3015 * new datasets. 3016 */ 3017static int 3018check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3019 boolean_t accept_ancestor, int *prefixlen) 3020{ 3021 zfs_cmd_t zc = { 0 }; 3022 char parent[ZFS_MAXNAMELEN]; 3023 char *slash; 3024 zfs_handle_t *zhp; 3025 char errbuf[1024]; 3026 uint64_t is_zoned; 3027 3028 (void) snprintf(errbuf, sizeof (errbuf), 3029 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3030 3031 /* get parent, and check to see if this is just a pool */ 3032 if (parent_name(path, parent, sizeof (parent)) != 0) { 3033 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3034 "missing dataset name")); 3035 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3036 } 3037 3038 /* check to see if the pool exists */ 3039 if ((slash = strchr(parent, '/')) == NULL) 3040 slash = parent + strlen(parent); 3041 (void) strncpy(zc.zc_name, parent, slash - parent); 3042 zc.zc_name[slash - parent] = '\0'; 3043 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3044 errno == ENOENT) { 3045 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3046 "no such pool '%s'"), zc.zc_name); 3047 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3048 } 3049 3050 /* check to see if the parent dataset exists */ 3051 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3052 if (errno == ENOENT && accept_ancestor) { 3053 /* 3054 * Go deeper to find an ancestor, give up on top level. 3055 */ 3056 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3057 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3058 "no such pool '%s'"), zc.zc_name); 3059 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3060 } 3061 } else if (errno == ENOENT) { 3062 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3063 "parent does not exist")); 3064 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3065 } else 3066 return (zfs_standard_error(hdl, errno, errbuf)); 3067 } 3068 3069 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3070 if (zoned != NULL) 3071 *zoned = is_zoned; 3072 3073 /* we are in a non-global zone, but parent is in the global zone */ 3074 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3075 (void) zfs_standard_error(hdl, EPERM, errbuf); 3076 zfs_close(zhp); 3077 return (-1); 3078 } 3079 3080 /* make sure parent is a filesystem */ 3081 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3082 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3083 "parent is not a filesystem")); 3084 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3085 zfs_close(zhp); 3086 return (-1); 3087 } 3088 3089 zfs_close(zhp); 3090 if (prefixlen != NULL) 3091 *prefixlen = strlen(parent); 3092 return (0); 3093} 3094 3095/* 3096 * Finds whether the dataset of the given type(s) exists. 3097 */ 3098boolean_t 3099zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3100{ 3101 zfs_handle_t *zhp; 3102 3103 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3104 return (B_FALSE); 3105 3106 /* 3107 * Try to get stats for the dataset, which will tell us if it exists. 3108 */ 3109 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3110 int ds_type = zhp->zfs_type; 3111 3112 zfs_close(zhp); 3113 if (types & ds_type) 3114 return (B_TRUE); 3115 } 3116 return (B_FALSE); 3117} 3118 3119/* 3120 * Given a path to 'target', create all the ancestors between 3121 * the prefixlen portion of the path, and the target itself. 3122 * Fail if the initial prefixlen-ancestor does not already exist. 3123 */ 3124int 3125create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3126{ 3127 zfs_handle_t *h; 3128 char *cp; 3129 const char *opname; 3130 3131 /* make sure prefix exists */ 3132 cp = target + prefixlen; 3133 if (*cp != '/') { 3134 assert(strchr(cp, '/') == NULL); 3135 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3136 } else { 3137 *cp = '\0'; 3138 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3139 *cp = '/'; 3140 } 3141 if (h == NULL) 3142 return (-1); 3143 zfs_close(h); 3144 3145 /* 3146 * Attempt to create, mount, and share any ancestor filesystems, 3147 * up to the prefixlen-long one. 3148 */ 3149 for (cp = target + prefixlen + 1; 3150 cp = strchr(cp, '/'); *cp = '/', cp++) { 3151 3152 *cp = '\0'; 3153 3154 h = make_dataset_handle(hdl, target); 3155 if (h) { 3156 /* it already exists, nothing to do here */ 3157 zfs_close(h); 3158 continue; 3159 } 3160 3161 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3162 NULL) != 0) { 3163 opname = dgettext(TEXT_DOMAIN, "create"); 3164 goto ancestorerr; 3165 } 3166 3167 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3168 if (h == NULL) { 3169 opname = dgettext(TEXT_DOMAIN, "open"); 3170 goto ancestorerr; 3171 } 3172 3173 if (zfs_mount(h, NULL, 0) != 0) { 3174 opname = dgettext(TEXT_DOMAIN, "mount"); 3175 goto ancestorerr; 3176 } 3177 3178 if (zfs_share(h) != 0) { 3179 opname = dgettext(TEXT_DOMAIN, "share"); 3180 goto ancestorerr; 3181 } 3182 3183 zfs_close(h); 3184 } 3185 3186 return (0); 3187 3188ancestorerr: 3189 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3190 "failed to %s ancestor '%s'"), opname, target); 3191 return (-1); 3192} 3193 3194/* 3195 * Creates non-existing ancestors of the given path. 3196 */ 3197int 3198zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3199{ 3200 int prefix; 3201 char *path_copy; 3202 int rc; 3203 3204 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3205 return (-1); 3206 3207 if ((path_copy = strdup(path)) != NULL) { 3208 rc = create_parents(hdl, path_copy, prefix); 3209 free(path_copy); 3210 } 3211 if (path_copy == NULL || rc != 0) 3212 return (-1); 3213 3214 return (0); 3215} 3216 3217/* 3218 * Create a new filesystem or volume. 3219 */ 3220int 3221zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3222 nvlist_t *props) 3223{ 3224 int ret; 3225 uint64_t size = 0; 3226 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3227 char errbuf[1024]; 3228 uint64_t zoned; 3229 enum lzc_dataset_type ost; 3230 3231 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3232 "cannot create '%s'"), path); 3233 3234 /* validate the path, taking care to note the extended error message */ 3235 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3236 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3237 3238 /* validate parents exist */ 3239 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3240 return (-1); 3241 3242 /* 3243 * The failure modes when creating a dataset of a different type over 3244 * one that already exists is a little strange. In particular, if you 3245 * try to create a dataset on top of an existing dataset, the ioctl() 3246 * will return ENOENT, not EEXIST. To prevent this from happening, we 3247 * first try to see if the dataset exists. 3248 */ 3249 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3250 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3251 "dataset already exists")); 3252 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3253 } 3254 3255 if (type == ZFS_TYPE_VOLUME) 3256 ost = LZC_DATSET_TYPE_ZVOL; 3257 else 3258 ost = LZC_DATSET_TYPE_ZFS; 3259 3260 /* open zpool handle for prop validation */ 3261 char pool_path[MAXNAMELEN]; 3262 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3263 3264 /* truncate pool_path at first slash */ 3265 char *p = strchr(pool_path, '/'); 3266 if (p != NULL) 3267 *p = '\0'; 3268 3269 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path); 3270 3271 if (props && (props = zfs_valid_proplist(hdl, type, props, 3272 zoned, NULL, zpool_handle, errbuf)) == 0) { 3273 zpool_close(zpool_handle); 3274 return (-1); 3275 } 3276 zpool_close(zpool_handle); 3277 3278 if (type == ZFS_TYPE_VOLUME) { 3279 /* 3280 * If we are creating a volume, the size and block size must 3281 * satisfy a few restraints. First, the blocksize must be a 3282 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3283 * volsize must be a multiple of the block size, and cannot be 3284 * zero. 3285 */ 3286 if (props == NULL || nvlist_lookup_uint64(props, 3287 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3288 nvlist_free(props); 3289 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3290 "missing volume size")); 3291 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3292 } 3293 3294 if ((ret = nvlist_lookup_uint64(props, 3295 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3296 &blocksize)) != 0) { 3297 if (ret == ENOENT) { 3298 blocksize = zfs_prop_default_numeric( 3299 ZFS_PROP_VOLBLOCKSIZE); 3300 } else { 3301 nvlist_free(props); 3302 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3303 "missing volume block size")); 3304 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3305 } 3306 } 3307 3308 if (size == 0) { 3309 nvlist_free(props); 3310 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3311 "volume size cannot be zero")); 3312 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3313 } 3314 3315 if (size % blocksize != 0) { 3316 nvlist_free(props); 3317 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3318 "volume size must be a multiple of volume block " 3319 "size")); 3320 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3321 } 3322 } 3323 3324 /* create the dataset */ 3325 ret = lzc_create(path, ost, props); 3326 nvlist_free(props); 3327 3328 /* check for failure */ 3329 if (ret != 0) { 3330 char parent[ZFS_MAXNAMELEN]; 3331 (void) parent_name(path, parent, sizeof (parent)); 3332 3333 switch (errno) { 3334 case ENOENT: 3335 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3336 "no such parent '%s'"), parent); 3337 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3338 3339 case EINVAL: 3340 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3341 "parent '%s' is not a filesystem"), parent); 3342 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3343 3344 case ENOTSUP: 3345 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3346 "pool must be upgraded to set this " 3347 "property or value")); 3348 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3349#ifdef _ILP32 3350 case EOVERFLOW: 3351 /* 3352 * This platform can't address a volume this big. 3353 */ 3354 if (type == ZFS_TYPE_VOLUME) 3355 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3356 errbuf)); 3357#endif 3358 /* FALLTHROUGH */ 3359 default: 3360 return (zfs_standard_error(hdl, errno, errbuf)); 3361 } 3362 } 3363 3364 return (0); 3365} 3366 3367/* 3368 * Destroys the given dataset. The caller must make sure that the filesystem 3369 * isn't mounted, and that there are no active dependents. If the file system 3370 * does not exist this function does nothing. 3371 */ 3372int 3373zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3374{ 3375 zfs_cmd_t zc = { 0 }; 3376 3377 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3378 nvlist_t *nv = fnvlist_alloc(); 3379 fnvlist_add_boolean(nv, zhp->zfs_name); 3380 int error = lzc_destroy_bookmarks(nv, NULL); 3381 fnvlist_free(nv); 3382 if (error != 0) { 3383 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3384 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3385 zhp->zfs_name)); 3386 } 3387 return (0); 3388 } 3389 3390 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3391 3392 if (ZFS_IS_VOLUME(zhp)) { 3393 zc.zc_objset_type = DMU_OST_ZVOL; 3394 } else { 3395 zc.zc_objset_type = DMU_OST_ZFS; 3396 } 3397 3398 zc.zc_defer_destroy = defer; 3399 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3400 errno != ENOENT) { 3401 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3402 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3403 zhp->zfs_name)); 3404 } 3405 3406 remove_mountpoint(zhp); 3407 3408 return (0); 3409} 3410 3411struct destroydata { 3412 nvlist_t *nvl; 3413 const char *snapname; 3414}; 3415 3416static int 3417zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3418{ 3419 struct destroydata *dd = arg; 3420 char name[ZFS_MAXNAMELEN]; 3421 int rv = 0; 3422 3423 (void) snprintf(name, sizeof (name), 3424 "%s@%s", zhp->zfs_name, dd->snapname); 3425 3426 if (lzc_exists(name)) 3427 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3428 3429 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3430 zfs_close(zhp); 3431 return (rv); 3432} 3433 3434/* 3435 * Destroys all snapshots with the given name in zhp & descendants. 3436 */ 3437int 3438zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3439{ 3440 int ret; 3441 struct destroydata dd = { 0 }; 3442 3443 dd.snapname = snapname; 3444 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3445 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3446 3447 if (nvlist_empty(dd.nvl)) { 3448 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3449 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3450 zhp->zfs_name, snapname); 3451 } else { 3452 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3453 } 3454 nvlist_free(dd.nvl); 3455 return (ret); 3456} 3457 3458/* 3459 * Destroys all the snapshots named in the nvlist. 3460 */ 3461int 3462zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3463{ 3464 int ret; 3465 nvlist_t *errlist; 3466 3467 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3468 3469 if (ret == 0) 3470 return (0); 3471 3472 if (nvlist_empty(errlist)) { 3473 char errbuf[1024]; 3474 (void) snprintf(errbuf, sizeof (errbuf), 3475 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3476 3477 ret = zfs_standard_error(hdl, ret, errbuf); 3478 } 3479 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3480 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3481 char errbuf[1024]; 3482 (void) snprintf(errbuf, sizeof (errbuf), 3483 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3484 nvpair_name(pair)); 3485 3486 switch (fnvpair_value_int32(pair)) { 3487 case EEXIST: 3488 zfs_error_aux(hdl, 3489 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3490 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3491 break; 3492 default: 3493 ret = zfs_standard_error(hdl, errno, errbuf); 3494 break; 3495 } 3496 } 3497 3498 return (ret); 3499} 3500 3501/* 3502 * Clones the given dataset. The target must be of the same type as the source. 3503 */ 3504int 3505zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3506{ 3507 char parent[ZFS_MAXNAMELEN]; 3508 int ret; 3509 char errbuf[1024]; 3510 libzfs_handle_t *hdl = zhp->zfs_hdl; 3511 uint64_t zoned; 3512 3513 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3514 3515 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3516 "cannot create '%s'"), target); 3517 3518 /* validate the target/clone name */ 3519 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3520 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3521 3522 /* validate parents exist */ 3523 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3524 return (-1); 3525 3526 (void) parent_name(target, parent, sizeof (parent)); 3527 3528 /* do the clone */ 3529 3530 if (props) { 3531 zfs_type_t type; 3532 if (ZFS_IS_VOLUME(zhp)) { 3533 type = ZFS_TYPE_VOLUME; 3534 } else { 3535 type = ZFS_TYPE_FILESYSTEM; 3536 } 3537 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3538 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3539 return (-1); 3540 } 3541 3542 ret = lzc_clone(target, zhp->zfs_name, props); 3543 nvlist_free(props); 3544 3545 if (ret != 0) { 3546 switch (errno) { 3547 3548 case ENOENT: 3549 /* 3550 * The parent doesn't exist. We should have caught this 3551 * above, but there may a race condition that has since 3552 * destroyed the parent. 3553 * 3554 * At this point, we don't know whether it's the source 3555 * that doesn't exist anymore, or whether the target 3556 * dataset doesn't exist. 3557 */ 3558 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3559 "no such parent '%s'"), parent); 3560 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3561 3562 case EXDEV: 3563 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3564 "source and target pools differ")); 3565 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3566 errbuf)); 3567 3568 default: 3569 return (zfs_standard_error(zhp->zfs_hdl, errno, 3570 errbuf)); 3571 } 3572 } 3573 3574 return (ret); 3575} 3576 3577/* 3578 * Promotes the given clone fs to be the clone parent. 3579 */ 3580int 3581zfs_promote(zfs_handle_t *zhp) 3582{ 3583 libzfs_handle_t *hdl = zhp->zfs_hdl; 3584 zfs_cmd_t zc = { 0 }; 3585 char parent[MAXPATHLEN]; 3586 int ret; 3587 char errbuf[1024]; 3588 3589 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3590 "cannot promote '%s'"), zhp->zfs_name); 3591 3592 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3593 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3594 "snapshots can not be promoted")); 3595 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3596 } 3597 3598 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3599 if (parent[0] == '\0') { 3600 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3601 "not a cloned filesystem")); 3602 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3603 } 3604 3605 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3606 sizeof (zc.zc_value)); 3607 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3608 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3609 3610 if (ret != 0) { 3611 int save_errno = errno; 3612 3613 switch (save_errno) { 3614 case EEXIST: 3615 /* There is a conflicting snapshot name. */ 3616 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3617 "conflicting snapshot '%s' from parent '%s'"), 3618 zc.zc_string, parent); 3619 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3620 3621 default: 3622 return (zfs_standard_error(hdl, save_errno, errbuf)); 3623 } 3624 } 3625 return (ret); 3626} 3627 3628typedef struct snapdata { 3629 nvlist_t *sd_nvl; 3630 const char *sd_snapname; 3631} snapdata_t; 3632 3633static int 3634zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3635{ 3636 snapdata_t *sd = arg; 3637 char name[ZFS_MAXNAMELEN]; 3638 int rv = 0; 3639 3640 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3641 (void) snprintf(name, sizeof (name), 3642 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3643 3644 fnvlist_add_boolean(sd->sd_nvl, name); 3645 3646 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3647 } 3648 zfs_close(zhp); 3649 3650 return (rv); 3651} 3652 3653/* 3654 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3655 * created. 3656 */ 3657int 3658zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3659{ 3660 int ret; 3661 char errbuf[1024]; 3662 nvpair_t *elem; 3663 nvlist_t *errors; 3664 3665 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3666 "cannot create snapshots ")); 3667 3668 elem = NULL; 3669 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3670 const char *snapname = nvpair_name(elem); 3671 3672 /* validate the target name */ 3673 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3674 B_TRUE)) { 3675 (void) snprintf(errbuf, sizeof (errbuf), 3676 dgettext(TEXT_DOMAIN, 3677 "cannot create snapshot '%s'"), snapname); 3678 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3679 } 3680 } 3681 3682 /* 3683 * get pool handle for prop validation. assumes all snaps are in the 3684 * same pool, as does lzc_snapshot (below). 3685 */ 3686 char pool[MAXNAMELEN]; 3687 elem = nvlist_next_nvpair(snaps, NULL); 3688 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3689 pool[strcspn(pool, "/@")] = '\0'; 3690 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3691 3692 if (props != NULL && 3693 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3694 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3695 zpool_close(zpool_hdl); 3696 return (-1); 3697 } 3698 zpool_close(zpool_hdl); 3699 3700 ret = lzc_snapshot(snaps, props, &errors); 3701 3702 if (ret != 0) { 3703 boolean_t printed = B_FALSE; 3704 for (elem = nvlist_next_nvpair(errors, NULL); 3705 elem != NULL; 3706 elem = nvlist_next_nvpair(errors, elem)) { 3707 (void) snprintf(errbuf, sizeof (errbuf), 3708 dgettext(TEXT_DOMAIN, 3709 "cannot create snapshot '%s'"), nvpair_name(elem)); 3710 (void) zfs_standard_error(hdl, 3711 fnvpair_value_int32(elem), errbuf); 3712 printed = B_TRUE; 3713 } 3714 if (!printed) { 3715 switch (ret) { 3716 case EXDEV: 3717 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3718 "multiple snapshots of same " 3719 "fs not allowed")); 3720 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3721 3722 break; 3723 default: 3724 (void) zfs_standard_error(hdl, ret, errbuf); 3725 } 3726 } 3727 } 3728 3729 nvlist_free(props); 3730 nvlist_free(errors); 3731 return (ret); 3732} 3733 3734int 3735zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3736 nvlist_t *props) 3737{ 3738 int ret; 3739 snapdata_t sd = { 0 }; 3740 char fsname[ZFS_MAXNAMELEN]; 3741 char *cp; 3742 zfs_handle_t *zhp; 3743 char errbuf[1024]; 3744 3745 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3746 "cannot snapshot %s"), path); 3747 3748 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3749 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3750 3751 (void) strlcpy(fsname, path, sizeof (fsname)); 3752 cp = strchr(fsname, '@'); 3753 *cp = '\0'; 3754 sd.sd_snapname = cp + 1; 3755 3756 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3757 ZFS_TYPE_VOLUME)) == NULL) { 3758 return (-1); 3759 } 3760 3761 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3762 if (recursive) { 3763 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3764 } else { 3765 fnvlist_add_boolean(sd.sd_nvl, path); 3766 } 3767 3768 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3769 nvlist_free(sd.sd_nvl); 3770 zfs_close(zhp); 3771 return (ret); 3772} 3773 3774/* 3775 * Destroy any more recent snapshots. We invoke this callback on any dependents 3776 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3777 * is a dependent and we should just destroy it without checking the transaction 3778 * group. 3779 */ 3780typedef struct rollback_data { 3781 const char *cb_target; /* the snapshot */ 3782 uint64_t cb_create; /* creation time reference */ 3783 boolean_t cb_error; 3784 boolean_t cb_force; 3785} rollback_data_t; 3786 3787static int 3788rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3789{ 3790 rollback_data_t *cbp = data; 3791 prop_changelist_t *clp; 3792 3793 /* We must destroy this clone; first unmount it */ 3794 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3795 cbp->cb_force ? MS_FORCE: 0); 3796 if (clp == NULL || changelist_prefix(clp) != 0) { 3797 cbp->cb_error = B_TRUE; 3798 zfs_close(zhp); 3799 return (0); 3800 } 3801 if (zfs_destroy(zhp, B_FALSE) != 0) 3802 cbp->cb_error = B_TRUE; 3803 else 3804 changelist_remove(clp, zhp->zfs_name); 3805 (void) changelist_postfix(clp); 3806 changelist_free(clp); 3807 3808 zfs_close(zhp); 3809 return (0); 3810} 3811 3812static int 3813rollback_destroy(zfs_handle_t *zhp, void *data) 3814{ 3815 rollback_data_t *cbp = data; 3816 3817 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3818 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3819 rollback_destroy_dependent, cbp); 3820 3821 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3822 } 3823 3824 zfs_close(zhp); 3825 return (0); 3826} 3827 3828/* 3829 * Given a dataset, rollback to a specific snapshot, discarding any 3830 * data changes since then and making it the active dataset. 3831 * 3832 * Any snapshots and bookmarks more recent than the target are 3833 * destroyed, along with their dependents (i.e. clones). 3834 */ 3835int 3836zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3837{ 3838 rollback_data_t cb = { 0 }; 3839 int err; 3840 boolean_t restore_resv = 0; 3841 uint64_t old_volsize, new_volsize; 3842 zfs_prop_t resv_prop; 3843 3844 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3845 zhp->zfs_type == ZFS_TYPE_VOLUME); 3846 3847 /* 3848 * Destroy all recent snapshots and their dependents. 3849 */ 3850 cb.cb_force = force; 3851 cb.cb_target = snap->zfs_name; 3852 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3853 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3854 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3855 3856 if (cb.cb_error) 3857 return (-1); 3858 3859 /* 3860 * Now that we have verified that the snapshot is the latest, 3861 * rollback to the given snapshot. 3862 */ 3863 3864 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3865 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3866 return (-1); 3867 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3868 restore_resv = 3869 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3870 } 3871 3872 /* 3873 * We rely on zfs_iter_children() to verify that there are no 3874 * newer snapshots for the given dataset. Therefore, we can 3875 * simply pass the name on to the ioctl() call. There is still 3876 * an unlikely race condition where the user has taken a 3877 * snapshot since we verified that this was the most recent. 3878 */ 3879 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3880 if (err != 0) { 3881 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3882 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3883 zhp->zfs_name); 3884 return (err); 3885 } 3886 3887 /* 3888 * For volumes, if the pre-rollback volsize matched the pre- 3889 * rollback reservation and the volsize has changed then set 3890 * the reservation property to the post-rollback volsize. 3891 * Make a new handle since the rollback closed the dataset. 3892 */ 3893 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3894 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3895 if (restore_resv) { 3896 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3897 if (old_volsize != new_volsize) 3898 err = zfs_prop_set_int(zhp, resv_prop, 3899 new_volsize); 3900 } 3901 zfs_close(zhp); 3902 } 3903 return (err); 3904} 3905 3906/* 3907 * Renames the given dataset. 3908 */ 3909int 3910zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3911 renameflags_t flags) 3912{ 3913 int ret; 3914 zfs_cmd_t zc = { 0 }; 3915 char *delim; 3916 prop_changelist_t *cl = NULL; 3917 zfs_handle_t *zhrp = NULL; 3918 char *parentname = NULL; 3919 char parent[ZFS_MAXNAMELEN]; 3920 char property[ZFS_MAXPROPLEN]; 3921 libzfs_handle_t *hdl = zhp->zfs_hdl; 3922 char errbuf[1024]; 3923 3924 /* if we have the same exact name, just return success */ 3925 if (strcmp(zhp->zfs_name, target) == 0) 3926 return (0); 3927 3928 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3929 "cannot rename to '%s'"), target); 3930 3931 if (source != NULL) { 3932 /* 3933 * This is recursive snapshots rename, put snapshot name 3934 * (that might not exist) into zfs_name. 3935 */ 3936 assert(flags.recurse); 3937 3938 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3939 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3940 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3941 } 3942 3943 /* 3944 * Make sure the target name is valid 3945 */ 3946 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3947 if ((strchr(target, '@') == NULL) || 3948 *target == '@') { 3949 /* 3950 * Snapshot target name is abbreviated, 3951 * reconstruct full dataset name 3952 */ 3953 (void) strlcpy(parent, zhp->zfs_name, 3954 sizeof (parent)); 3955 delim = strchr(parent, '@'); 3956 if (strchr(target, '@') == NULL) 3957 *(++delim) = '\0'; 3958 else 3959 *delim = '\0'; 3960 (void) strlcat(parent, target, sizeof (parent)); 3961 target = parent; 3962 } else { 3963 /* 3964 * Make sure we're renaming within the same dataset. 3965 */ 3966 delim = strchr(target, '@'); 3967 if (strncmp(zhp->zfs_name, target, delim - target) 3968 != 0 || zhp->zfs_name[delim - target] != '@') { 3969 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3970 "snapshots must be part of same " 3971 "dataset")); 3972 return (zfs_error(hdl, EZFS_CROSSTARGET, 3973 errbuf)); 3974 } 3975 } 3976 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3977 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3978 } else { 3979 if (flags.recurse) { 3980 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3981 "recursive rename must be a snapshot")); 3982 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3983 } 3984 3985 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3986 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3987 3988 /* validate parents */ 3989 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3990 return (-1); 3991 3992 /* make sure we're in the same pool */ 3993 verify((delim = strchr(target, '/')) != NULL); 3994 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3995 zhp->zfs_name[delim - target] != '/') { 3996 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3997 "datasets must be within same pool")); 3998 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3999 } 4000 4001 /* new name cannot be a child of the current dataset name */ 4002 if (is_descendant(zhp->zfs_name, target)) { 4003 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4004 "New dataset name cannot be a descendant of " 4005 "current dataset name")); 4006 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4007 } 4008 } 4009 4010 (void) snprintf(errbuf, sizeof (errbuf), 4011 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4012 4013 if (getzoneid() == GLOBAL_ZONEID && 4014 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4015 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4016 "dataset is used in a non-global zone")); 4017 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4018 } 4019 4020 /* 4021 * Avoid unmounting file systems with mountpoint property set to 4022 * 'legacy' or 'none' even if -u option is not given. 4023 */ 4024 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4025 !flags.recurse && !flags.nounmount && 4026 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4027 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4028 (strcmp(property, "legacy") == 0 || 4029 strcmp(property, "none") == 0)) { 4030 flags.nounmount = B_TRUE; 4031 } 4032 if (flags.recurse) { 4033 4034 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4035 if (parentname == NULL) { 4036 ret = -1; 4037 goto error; 4038 } 4039 delim = strchr(parentname, '@'); 4040 *delim = '\0'; 4041 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4042 if (zhrp == NULL) { 4043 ret = -1; 4044 goto error; 4045 } 4046 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4047 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4048 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4049 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4050 return (-1); 4051 } 4052 4053 if (changelist_haszonedchild(cl)) { 4054 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4055 "child dataset with inherited mountpoint is used " 4056 "in a non-global zone")); 4057 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4058 goto error; 4059 } 4060 4061 if ((ret = changelist_prefix(cl)) != 0) 4062 goto error; 4063 } 4064 4065 if (ZFS_IS_VOLUME(zhp)) 4066 zc.zc_objset_type = DMU_OST_ZVOL; 4067 else 4068 zc.zc_objset_type = DMU_OST_ZFS; 4069 4070 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4071 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4072 4073 zc.zc_cookie = flags.recurse ? 1 : 0; 4074 if (flags.nounmount) 4075 zc.zc_cookie |= 2; 4076 4077 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4078 /* 4079 * if it was recursive, the one that actually failed will 4080 * be in zc.zc_name 4081 */ 4082 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4083 "cannot rename '%s'"), zc.zc_name); 4084 4085 if (flags.recurse && errno == EEXIST) { 4086 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4087 "a child dataset already has a snapshot " 4088 "with the new name")); 4089 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4090 } else { 4091 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4092 } 4093 4094 /* 4095 * On failure, we still want to remount any filesystems that 4096 * were previously mounted, so we don't alter the system state. 4097 */ 4098 if (cl != NULL) 4099 (void) changelist_postfix(cl); 4100 } else { 4101 if (cl != NULL) { 4102 changelist_rename(cl, zfs_get_name(zhp), target); 4103 ret = changelist_postfix(cl); 4104 } 4105 } 4106 4107error: 4108 if (parentname != NULL) { 4109 free(parentname); 4110 } 4111 if (zhrp != NULL) { 4112 zfs_close(zhrp); 4113 } 4114 if (cl != NULL) { 4115 changelist_free(cl); 4116 } 4117 return (ret); 4118} 4119 4120nvlist_t * 4121zfs_get_user_props(zfs_handle_t *zhp) 4122{ 4123 return (zhp->zfs_user_props); 4124} 4125 4126nvlist_t * 4127zfs_get_recvd_props(zfs_handle_t *zhp) 4128{ 4129 if (zhp->zfs_recvd_props == NULL) 4130 if (get_recvd_props_ioctl(zhp) != 0) 4131 return (NULL); 4132 return (zhp->zfs_recvd_props); 4133} 4134 4135/* 4136 * This function is used by 'zfs list' to determine the exact set of columns to 4137 * display, and their maximum widths. This does two main things: 4138 * 4139 * - If this is a list of all properties, then expand the list to include 4140 * all native properties, and set a flag so that for each dataset we look 4141 * for new unique user properties and add them to the list. 4142 * 4143 * - For non fixed-width properties, keep track of the maximum width seen 4144 * so that we can size the column appropriately. If the user has 4145 * requested received property values, we also need to compute the width 4146 * of the RECEIVED column. 4147 */ 4148int 4149zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4150 boolean_t literal) 4151{ 4152 libzfs_handle_t *hdl = zhp->zfs_hdl; 4153 zprop_list_t *entry; 4154 zprop_list_t **last, **start; 4155 nvlist_t *userprops, *propval; 4156 nvpair_t *elem; 4157 char *strval; 4158 char buf[ZFS_MAXPROPLEN]; 4159 4160 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4161 return (-1); 4162 4163 userprops = zfs_get_user_props(zhp); 4164 4165 entry = *plp; 4166 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4167 /* 4168 * Go through and add any user properties as necessary. We 4169 * start by incrementing our list pointer to the first 4170 * non-native property. 4171 */ 4172 start = plp; 4173 while (*start != NULL) { 4174 if ((*start)->pl_prop == ZPROP_INVAL) 4175 break; 4176 start = &(*start)->pl_next; 4177 } 4178 4179 elem = NULL; 4180 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4181 /* 4182 * See if we've already found this property in our list. 4183 */ 4184 for (last = start; *last != NULL; 4185 last = &(*last)->pl_next) { 4186 if (strcmp((*last)->pl_user_prop, 4187 nvpair_name(elem)) == 0) 4188 break; 4189 } 4190 4191 if (*last == NULL) { 4192 if ((entry = zfs_alloc(hdl, 4193 sizeof (zprop_list_t))) == NULL || 4194 ((entry->pl_user_prop = zfs_strdup(hdl, 4195 nvpair_name(elem)))) == NULL) { 4196 free(entry); 4197 return (-1); 4198 } 4199 4200 entry->pl_prop = ZPROP_INVAL; 4201 entry->pl_width = strlen(nvpair_name(elem)); 4202 entry->pl_all = B_TRUE; 4203 *last = entry; 4204 } 4205 } 4206 } 4207 4208 /* 4209 * Now go through and check the width of any non-fixed columns 4210 */ 4211 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4212 if (entry->pl_fixed && !literal) 4213 continue; 4214 4215 if (entry->pl_prop != ZPROP_INVAL) { 4216 if (zfs_prop_get(zhp, entry->pl_prop, 4217 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4218 if (strlen(buf) > entry->pl_width) 4219 entry->pl_width = strlen(buf); 4220 } 4221 if (received && zfs_prop_get_recvd(zhp, 4222 zfs_prop_to_name(entry->pl_prop), 4223 buf, sizeof (buf), literal) == 0) 4224 if (strlen(buf) > entry->pl_recvd_width) 4225 entry->pl_recvd_width = strlen(buf); 4226 } else { 4227 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4228 &propval) == 0) { 4229 verify(nvlist_lookup_string(propval, 4230 ZPROP_VALUE, &strval) == 0); 4231 if (strlen(strval) > entry->pl_width) 4232 entry->pl_width = strlen(strval); 4233 } 4234 if (received && zfs_prop_get_recvd(zhp, 4235 entry->pl_user_prop, 4236 buf, sizeof (buf), literal) == 0) 4237 if (strlen(buf) > entry->pl_recvd_width) 4238 entry->pl_recvd_width = strlen(buf); 4239 } 4240 } 4241 4242 return (0); 4243} 4244 4245int 4246zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4247 char *resource, void *export, void *sharetab, 4248 int sharemax, zfs_share_op_t operation) 4249{ 4250 zfs_cmd_t zc = { 0 }; 4251 int error; 4252 4253 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4254 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4255 if (resource) 4256 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4257 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4258 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4259 zc.zc_share.z_sharetype = operation; 4260 zc.zc_share.z_sharemax = sharemax; 4261 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4262 return (error); 4263} 4264 4265void 4266zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4267{ 4268 nvpair_t *curr; 4269 4270 /* 4271 * Keep a reference to the props-table against which we prune the 4272 * properties. 4273 */ 4274 zhp->zfs_props_table = props; 4275 4276 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4277 4278 while (curr) { 4279 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4280 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4281 4282 /* 4283 * User properties will result in ZPROP_INVAL, and since we 4284 * only know how to prune standard ZFS properties, we always 4285 * leave these in the list. This can also happen if we 4286 * encounter an unknown DSL property (when running older 4287 * software, for example). 4288 */ 4289 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4290 (void) nvlist_remove(zhp->zfs_props, 4291 nvpair_name(curr), nvpair_type(curr)); 4292 curr = next; 4293 } 4294} 4295 4296#ifdef illumos 4297static int 4298zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4299 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4300{ 4301 zfs_cmd_t zc = { 0 }; 4302 nvlist_t *nvlist = NULL; 4303 int error; 4304 4305 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4306 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4307 zc.zc_cookie = (uint64_t)cmd; 4308 4309 if (cmd == ZFS_SMB_ACL_RENAME) { 4310 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4311 (void) no_memory(hdl); 4312 return (0); 4313 } 4314 } 4315 4316 switch (cmd) { 4317 case ZFS_SMB_ACL_ADD: 4318 case ZFS_SMB_ACL_REMOVE: 4319 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4320 break; 4321 case ZFS_SMB_ACL_RENAME: 4322 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4323 resource1) != 0) { 4324 (void) no_memory(hdl); 4325 return (-1); 4326 } 4327 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4328 resource2) != 0) { 4329 (void) no_memory(hdl); 4330 return (-1); 4331 } 4332 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4333 nvlist_free(nvlist); 4334 return (-1); 4335 } 4336 break; 4337 case ZFS_SMB_ACL_PURGE: 4338 break; 4339 default: 4340 return (-1); 4341 } 4342 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4343 nvlist_free(nvlist); 4344 return (error); 4345} 4346 4347int 4348zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4349 char *path, char *resource) 4350{ 4351 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4352 resource, NULL)); 4353} 4354 4355int 4356zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4357 char *path, char *resource) 4358{ 4359 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4360 resource, NULL)); 4361} 4362 4363int 4364zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4365{ 4366 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4367 NULL, NULL)); 4368} 4369 4370int 4371zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4372 char *oldname, char *newname) 4373{ 4374 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4375 oldname, newname)); 4376} 4377#endif /* illumos */ 4378 4379int 4380zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4381 zfs_userspace_cb_t func, void *arg) 4382{ 4383 zfs_cmd_t zc = { 0 }; 4384 zfs_useracct_t buf[100]; 4385 libzfs_handle_t *hdl = zhp->zfs_hdl; 4386 int ret; 4387 4388 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4389 4390 zc.zc_objset_type = type; 4391 zc.zc_nvlist_dst = (uintptr_t)buf; 4392 4393 for (;;) { 4394 zfs_useracct_t *zua = buf; 4395 4396 zc.zc_nvlist_dst_size = sizeof (buf); 4397 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4398 char errbuf[1024]; 4399 4400 (void) snprintf(errbuf, sizeof (errbuf), 4401 dgettext(TEXT_DOMAIN, 4402 "cannot get used/quota for %s"), zc.zc_name); 4403 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4404 } 4405 if (zc.zc_nvlist_dst_size == 0) 4406 break; 4407 4408 while (zc.zc_nvlist_dst_size > 0) { 4409 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4410 zua->zu_space)) != 0) 4411 return (ret); 4412 zua++; 4413 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4414 } 4415 } 4416 4417 return (0); 4418} 4419 4420struct holdarg { 4421 nvlist_t *nvl; 4422 const char *snapname; 4423 const char *tag; 4424 boolean_t recursive; 4425 int error; 4426}; 4427 4428static int 4429zfs_hold_one(zfs_handle_t *zhp, void *arg) 4430{ 4431 struct holdarg *ha = arg; 4432 char name[ZFS_MAXNAMELEN]; 4433 int rv = 0; 4434 4435 (void) snprintf(name, sizeof (name), 4436 "%s@%s", zhp->zfs_name, ha->snapname); 4437 4438 if (lzc_exists(name)) 4439 fnvlist_add_string(ha->nvl, name, ha->tag); 4440 4441 if (ha->recursive) 4442 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4443 zfs_close(zhp); 4444 return (rv); 4445} 4446 4447int 4448zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4449 boolean_t recursive, int cleanup_fd) 4450{ 4451 int ret; 4452 struct holdarg ha; 4453 4454 ha.nvl = fnvlist_alloc(); 4455 ha.snapname = snapname; 4456 ha.tag = tag; 4457 ha.recursive = recursive; 4458 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4459 4460 if (nvlist_empty(ha.nvl)) { 4461 char errbuf[1024]; 4462 4463 fnvlist_free(ha.nvl); 4464 ret = ENOENT; 4465 (void) snprintf(errbuf, sizeof (errbuf), 4466 dgettext(TEXT_DOMAIN, 4467 "cannot hold snapshot '%s@%s'"), 4468 zhp->zfs_name, snapname); 4469 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4470 return (ret); 4471 } 4472 4473 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4474 fnvlist_free(ha.nvl); 4475 4476 return (ret); 4477} 4478 4479int 4480zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4481{ 4482 int ret; 4483 nvlist_t *errors; 4484 libzfs_handle_t *hdl = zhp->zfs_hdl; 4485 char errbuf[1024]; 4486 nvpair_t *elem; 4487 4488 errors = NULL; 4489 ret = lzc_hold(holds, cleanup_fd, &errors); 4490 4491 if (ret == 0) { 4492 /* There may be errors even in the success case. */ 4493 fnvlist_free(errors); 4494 return (0); 4495 } 4496 4497 if (nvlist_empty(errors)) { 4498 /* no hold-specific errors */ 4499 (void) snprintf(errbuf, sizeof (errbuf), 4500 dgettext(TEXT_DOMAIN, "cannot hold")); 4501 switch (ret) { 4502 case ENOTSUP: 4503 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4504 "pool must be upgraded")); 4505 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4506 break; 4507 case EINVAL: 4508 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4509 break; 4510 default: 4511 (void) zfs_standard_error(hdl, ret, errbuf); 4512 } 4513 } 4514 4515 for (elem = nvlist_next_nvpair(errors, NULL); 4516 elem != NULL; 4517 elem = nvlist_next_nvpair(errors, elem)) { 4518 (void) snprintf(errbuf, sizeof (errbuf), 4519 dgettext(TEXT_DOMAIN, 4520 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4521 switch (fnvpair_value_int32(elem)) { 4522 case E2BIG: 4523 /* 4524 * Temporary tags wind up having the ds object id 4525 * prepended. So even if we passed the length check 4526 * above, it's still possible for the tag to wind 4527 * up being slightly too long. 4528 */ 4529 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4530 break; 4531 case EINVAL: 4532 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4533 break; 4534 case EEXIST: 4535 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4536 break; 4537 default: 4538 (void) zfs_standard_error(hdl, 4539 fnvpair_value_int32(elem), errbuf); 4540 } 4541 } 4542 4543 fnvlist_free(errors); 4544 return (ret); 4545} 4546 4547static int 4548zfs_release_one(zfs_handle_t *zhp, void *arg) 4549{ 4550 struct holdarg *ha = arg; 4551 char name[ZFS_MAXNAMELEN]; 4552 int rv = 0; 4553 nvlist_t *existing_holds; 4554 4555 (void) snprintf(name, sizeof (name), 4556 "%s@%s", zhp->zfs_name, ha->snapname); 4557 4558 if (lzc_get_holds(name, &existing_holds) != 0) { 4559 ha->error = ENOENT; 4560 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4561 ha->error = ESRCH; 4562 } else { 4563 nvlist_t *torelease = fnvlist_alloc(); 4564 fnvlist_add_boolean(torelease, ha->tag); 4565 fnvlist_add_nvlist(ha->nvl, name, torelease); 4566 fnvlist_free(torelease); 4567 } 4568 4569 if (ha->recursive) 4570 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4571 zfs_close(zhp); 4572 return (rv); 4573} 4574 4575int 4576zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4577 boolean_t recursive) 4578{ 4579 int ret; 4580 struct holdarg ha; 4581 nvlist_t *errors = NULL; 4582 nvpair_t *elem; 4583 libzfs_handle_t *hdl = zhp->zfs_hdl; 4584 char errbuf[1024]; 4585 4586 ha.nvl = fnvlist_alloc(); 4587 ha.snapname = snapname; 4588 ha.tag = tag; 4589 ha.recursive = recursive; 4590 ha.error = 0; 4591 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4592 4593 if (nvlist_empty(ha.nvl)) { 4594 fnvlist_free(ha.nvl); 4595 ret = ha.error; 4596 (void) snprintf(errbuf, sizeof (errbuf), 4597 dgettext(TEXT_DOMAIN, 4598 "cannot release hold from snapshot '%s@%s'"), 4599 zhp->zfs_name, snapname); 4600 if (ret == ESRCH) { 4601 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4602 } else { 4603 (void) zfs_standard_error(hdl, ret, errbuf); 4604 } 4605 return (ret); 4606 } 4607 4608 ret = lzc_release(ha.nvl, &errors); 4609 fnvlist_free(ha.nvl); 4610 4611 if (ret == 0) { 4612 /* There may be errors even in the success case. */ 4613 fnvlist_free(errors); 4614 return (0); 4615 } 4616 4617 if (nvlist_empty(errors)) { 4618 /* no hold-specific errors */ 4619 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4620 "cannot release")); 4621 switch (errno) { 4622 case ENOTSUP: 4623 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4624 "pool must be upgraded")); 4625 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4626 break; 4627 default: 4628 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4629 } 4630 } 4631 4632 for (elem = nvlist_next_nvpair(errors, NULL); 4633 elem != NULL; 4634 elem = nvlist_next_nvpair(errors, elem)) { 4635 (void) snprintf(errbuf, sizeof (errbuf), 4636 dgettext(TEXT_DOMAIN, 4637 "cannot release hold from snapshot '%s'"), 4638 nvpair_name(elem)); 4639 switch (fnvpair_value_int32(elem)) { 4640 case ESRCH: 4641 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4642 break; 4643 case EINVAL: 4644 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4645 break; 4646 default: 4647 (void) zfs_standard_error_fmt(hdl, 4648 fnvpair_value_int32(elem), errbuf); 4649 } 4650 } 4651 4652 fnvlist_free(errors); 4653 return (ret); 4654} 4655 4656int 4657zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4658{ 4659 zfs_cmd_t zc = { 0 }; 4660 libzfs_handle_t *hdl = zhp->zfs_hdl; 4661 int nvsz = 2048; 4662 void *nvbuf; 4663 int err = 0; 4664 char errbuf[1024]; 4665 4666 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4667 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4668 4669tryagain: 4670 4671 nvbuf = malloc(nvsz); 4672 if (nvbuf == NULL) { 4673 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4674 goto out; 4675 } 4676 4677 zc.zc_nvlist_dst_size = nvsz; 4678 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4679 4680 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN); 4681 4682 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4683 (void) snprintf(errbuf, sizeof (errbuf), 4684 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4685 zc.zc_name); 4686 switch (errno) { 4687 case ENOMEM: 4688 free(nvbuf); 4689 nvsz = zc.zc_nvlist_dst_size; 4690 goto tryagain; 4691 4692 case ENOTSUP: 4693 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4694 "pool must be upgraded")); 4695 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4696 break; 4697 case EINVAL: 4698 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4699 break; 4700 case ENOENT: 4701 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4702 break; 4703 default: 4704 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4705 break; 4706 } 4707 } else { 4708 /* success */ 4709 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4710 if (rc) { 4711 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4712 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4713 zc.zc_name); 4714 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4715 } 4716 } 4717 4718 free(nvbuf); 4719out: 4720 return (err); 4721} 4722 4723int 4724zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4725{ 4726 zfs_cmd_t zc = { 0 }; 4727 libzfs_handle_t *hdl = zhp->zfs_hdl; 4728 char *nvbuf; 4729 char errbuf[1024]; 4730 size_t nvsz; 4731 int err; 4732 4733 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4734 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4735 4736 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4737 assert(err == 0); 4738 4739 nvbuf = malloc(nvsz); 4740 4741 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4742 assert(err == 0); 4743 4744 zc.zc_nvlist_src_size = nvsz; 4745 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4746 zc.zc_perm_action = un; 4747 4748 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4749 4750 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4751 (void) snprintf(errbuf, sizeof (errbuf), 4752 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4753 zc.zc_name); 4754 switch (errno) { 4755 case ENOTSUP: 4756 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4757 "pool must be upgraded")); 4758 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4759 break; 4760 case EINVAL: 4761 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4762 break; 4763 case ENOENT: 4764 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4765 break; 4766 default: 4767 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4768 break; 4769 } 4770 } 4771 4772 free(nvbuf); 4773 4774 return (err); 4775} 4776 4777int 4778zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4779{ 4780 int err; 4781 char errbuf[1024]; 4782 4783 err = lzc_get_holds(zhp->zfs_name, nvl); 4784 4785 if (err != 0) { 4786 libzfs_handle_t *hdl = zhp->zfs_hdl; 4787 4788 (void) snprintf(errbuf, sizeof (errbuf), 4789 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4790 zhp->zfs_name); 4791 switch (err) { 4792 case ENOTSUP: 4793 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4794 "pool must be upgraded")); 4795 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4796 break; 4797 case EINVAL: 4798 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4799 break; 4800 case ENOENT: 4801 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4802 break; 4803 default: 4804 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4805 break; 4806 } 4807 } 4808 4809 return (err); 4810} 4811 4812/* 4813 * Convert the zvol's volume size to an appropriate reservation. 4814 * Note: If this routine is updated, it is necessary to update the ZFS test 4815 * suite's shell version in reservation.kshlib. 4816 */ 4817uint64_t 4818zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4819{ 4820 uint64_t numdb; 4821 uint64_t nblocks, volblocksize; 4822 int ncopies; 4823 char *strval; 4824 4825 if (nvlist_lookup_string(props, 4826 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4827 ncopies = atoi(strval); 4828 else 4829 ncopies = 1; 4830 if (nvlist_lookup_uint64(props, 4831 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4832 &volblocksize) != 0) 4833 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4834 nblocks = volsize/volblocksize; 4835 /* start with metadnode L0-L6 */ 4836 numdb = 7; 4837 /* calculate number of indirects */ 4838 while (nblocks > 1) { 4839 nblocks += DNODES_PER_LEVEL - 1; 4840 nblocks /= DNODES_PER_LEVEL; 4841 numdb += nblocks; 4842 } 4843 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4844 volsize *= ncopies; 4845 /* 4846 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4847 * compressed, but in practice they compress down to about 4848 * 1100 bytes 4849 */ 4850 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4851 volsize += numdb; 4852 return (volsize); 4853} 4854 4855/* 4856 * Attach/detach the given filesystem to/from the given jail. 4857 */ 4858int 4859zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4860{ 4861 libzfs_handle_t *hdl = zhp->zfs_hdl; 4862 zfs_cmd_t zc = { 0 }; 4863 char errbuf[1024]; 4864 unsigned long cmd; 4865 int ret; 4866 4867 if (attach) { 4868 (void) snprintf(errbuf, sizeof (errbuf), 4869 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4870 } else { 4871 (void) snprintf(errbuf, sizeof (errbuf), 4872 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4873 } 4874 4875 switch (zhp->zfs_type) { 4876 case ZFS_TYPE_VOLUME: 4877 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4878 "volumes can not be jailed")); 4879 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4880 case ZFS_TYPE_SNAPSHOT: 4881 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4882 "snapshots can not be jailed")); 4883 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4884 } 4885 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4886 4887 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4888 zc.zc_objset_type = DMU_OST_ZFS; 4889 zc.zc_jailid = jailid; 4890 4891 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4892 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4893 zfs_standard_error(hdl, errno, errbuf); 4894 4895 return (ret); 4896} 4897