libzfs_dataset.c revision 297112
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek <pawel@dawidek.net>. 28 * All rights reserved. 29 * Copyright (c) 2012 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 30 * Copyright (c) 2013 Steven Hartland. All rights reserved. 31 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 32 * Copyright (c) 2014 Integros [integros.com] 33 */ 34 35#include <ctype.h> 36#include <errno.h> 37#include <libintl.h> 38#include <math.h> 39#include <stdio.h> 40#include <stdlib.h> 41#include <strings.h> 42#include <unistd.h> 43#include <stddef.h> 44#include <zone.h> 45#include <fcntl.h> 46#include <sys/mntent.h> 47#include <sys/mount.h> 48#include <priv.h> 49#include <pwd.h> 50#include <grp.h> 51#include <stddef.h> 52#include <idmap.h> 53 54#include <sys/dnode.h> 55#include <sys/spa.h> 56#include <sys/zap.h> 57#include <sys/misc.h> 58#include <libzfs.h> 59 60#include "zfs_namecheck.h" 61#include "zfs_prop.h" 62#include "libzfs_impl.h" 63#include "zfs_deleg.h" 64 65static int userquota_propname_decode(const char *propname, boolean_t zoned, 66 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 67 68/* 69 * Given a single type (not a mask of types), return the type in a human 70 * readable form. 71 */ 72const char * 73zfs_type_to_name(zfs_type_t type) 74{ 75 switch (type) { 76 case ZFS_TYPE_FILESYSTEM: 77 return (dgettext(TEXT_DOMAIN, "filesystem")); 78 case ZFS_TYPE_SNAPSHOT: 79 return (dgettext(TEXT_DOMAIN, "snapshot")); 80 case ZFS_TYPE_VOLUME: 81 return (dgettext(TEXT_DOMAIN, "volume")); 82 } 83 84 return (NULL); 85} 86 87/* 88 * Given a path and mask of ZFS types, return a string describing this dataset. 89 * This is used when we fail to open a dataset and we cannot get an exact type. 90 * We guess what the type would have been based on the path and the mask of 91 * acceptable types. 92 */ 93static const char * 94path_to_str(const char *path, int types) 95{ 96 /* 97 * When given a single type, always report the exact type. 98 */ 99 if (types == ZFS_TYPE_SNAPSHOT) 100 return (dgettext(TEXT_DOMAIN, "snapshot")); 101 if (types == ZFS_TYPE_FILESYSTEM) 102 return (dgettext(TEXT_DOMAIN, "filesystem")); 103 if (types == ZFS_TYPE_VOLUME) 104 return (dgettext(TEXT_DOMAIN, "volume")); 105 106 /* 107 * The user is requesting more than one type of dataset. If this is the 108 * case, consult the path itself. If we're looking for a snapshot, and 109 * a '@' is found, then report it as "snapshot". Otherwise, remove the 110 * snapshot attribute and try again. 111 */ 112 if (types & ZFS_TYPE_SNAPSHOT) { 113 if (strchr(path, '@') != NULL) 114 return (dgettext(TEXT_DOMAIN, "snapshot")); 115 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT)); 116 } 117 118 /* 119 * The user has requested either filesystems or volumes. 120 * We have no way of knowing a priori what type this would be, so always 121 * report it as "filesystem" or "volume", our two primitive types. 122 */ 123 if (types & ZFS_TYPE_FILESYSTEM) 124 return (dgettext(TEXT_DOMAIN, "filesystem")); 125 126 assert(types & ZFS_TYPE_VOLUME); 127 return (dgettext(TEXT_DOMAIN, "volume")); 128} 129 130/* 131 * Validate a ZFS path. This is used even before trying to open the dataset, to 132 * provide a more meaningful error message. We call zfs_error_aux() to 133 * explain exactly why the name was not valid. 134 */ 135int 136zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 137 boolean_t modifying) 138{ 139 namecheck_err_t why; 140 char what; 141 142 (void) zfs_prop_get_table(); 143 if (dataset_namecheck(path, &why, &what) != 0) { 144 if (hdl != NULL) { 145 switch (why) { 146 case NAME_ERR_TOOLONG: 147 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 148 "name is too long")); 149 break; 150 151 case NAME_ERR_LEADING_SLASH: 152 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 153 "leading slash in name")); 154 break; 155 156 case NAME_ERR_EMPTY_COMPONENT: 157 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 158 "empty component in name")); 159 break; 160 161 case NAME_ERR_TRAILING_SLASH: 162 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 163 "trailing slash in name")); 164 break; 165 166 case NAME_ERR_INVALCHAR: 167 zfs_error_aux(hdl, 168 dgettext(TEXT_DOMAIN, "invalid character " 169 "'%c' in name"), what); 170 break; 171 172 case NAME_ERR_MULTIPLE_AT: 173 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 174 "multiple '@' delimiters in name")); 175 break; 176 177 case NAME_ERR_NOLETTER: 178 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 179 "pool doesn't begin with a letter")); 180 break; 181 182 case NAME_ERR_RESERVED: 183 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 184 "name is reserved")); 185 break; 186 187 case NAME_ERR_DISKLIKE: 188 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 189 "reserved disk name")); 190 break; 191 } 192 } 193 194 return (0); 195 } 196 197 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 198 if (hdl != NULL) 199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 200 "snapshot delimiter '@' in filesystem name")); 201 return (0); 202 } 203 204 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 205 if (hdl != NULL) 206 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 207 "missing '@' delimiter in snapshot name")); 208 return (0); 209 } 210 211 if (modifying && strchr(path, '%') != NULL) { 212 if (hdl != NULL) 213 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 214 "invalid character %c in name"), '%'); 215 return (0); 216 } 217 218 return (-1); 219} 220 221int 222zfs_name_valid(const char *name, zfs_type_t type) 223{ 224 if (type == ZFS_TYPE_POOL) 225 return (zpool_name_valid(NULL, B_FALSE, name)); 226 return (zfs_validate_name(NULL, name, type, B_FALSE)); 227} 228 229/* 230 * This function takes the raw DSL properties, and filters out the user-defined 231 * properties into a separate nvlist. 232 */ 233static nvlist_t * 234process_user_props(zfs_handle_t *zhp, nvlist_t *props) 235{ 236 libzfs_handle_t *hdl = zhp->zfs_hdl; 237 nvpair_t *elem; 238 nvlist_t *propval; 239 nvlist_t *nvl; 240 241 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 242 (void) no_memory(hdl); 243 return (NULL); 244 } 245 246 elem = NULL; 247 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 248 if (!zfs_prop_user(nvpair_name(elem))) 249 continue; 250 251 verify(nvpair_value_nvlist(elem, &propval) == 0); 252 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 253 nvlist_free(nvl); 254 (void) no_memory(hdl); 255 return (NULL); 256 } 257 } 258 259 return (nvl); 260} 261 262static zpool_handle_t * 263zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 264{ 265 libzfs_handle_t *hdl = zhp->zfs_hdl; 266 zpool_handle_t *zph; 267 268 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 269 if (hdl->libzfs_pool_handles != NULL) 270 zph->zpool_next = hdl->libzfs_pool_handles; 271 hdl->libzfs_pool_handles = zph; 272 } 273 return (zph); 274} 275 276static zpool_handle_t * 277zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 278{ 279 libzfs_handle_t *hdl = zhp->zfs_hdl; 280 zpool_handle_t *zph = hdl->libzfs_pool_handles; 281 282 while ((zph != NULL) && 283 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 284 zph = zph->zpool_next; 285 return (zph); 286} 287 288/* 289 * Returns a handle to the pool that contains the provided dataset. 290 * If a handle to that pool already exists then that handle is returned. 291 * Otherwise, a new handle is created and added to the list of handles. 292 */ 293static zpool_handle_t * 294zpool_handle(zfs_handle_t *zhp) 295{ 296 char *pool_name; 297 int len; 298 zpool_handle_t *zph; 299 300 len = strcspn(zhp->zfs_name, "/@#") + 1; 301 pool_name = zfs_alloc(zhp->zfs_hdl, len); 302 (void) strlcpy(pool_name, zhp->zfs_name, len); 303 304 zph = zpool_find_handle(zhp, pool_name, len); 305 if (zph == NULL) 306 zph = zpool_add_handle(zhp, pool_name); 307 308 free(pool_name); 309 return (zph); 310} 311 312void 313zpool_free_handles(libzfs_handle_t *hdl) 314{ 315 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 316 317 while (zph != NULL) { 318 next = zph->zpool_next; 319 zpool_close(zph); 320 zph = next; 321 } 322 hdl->libzfs_pool_handles = NULL; 323} 324 325/* 326 * Utility function to gather stats (objset and zpl) for the given object. 327 */ 328static int 329get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 330{ 331 libzfs_handle_t *hdl = zhp->zfs_hdl; 332 333 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 334 335 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { 336 if (errno == ENOMEM) { 337 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 338 return (-1); 339 } 340 } else { 341 return (-1); 342 } 343 } 344 return (0); 345} 346 347/* 348 * Utility function to get the received properties of the given object. 349 */ 350static int 351get_recvd_props_ioctl(zfs_handle_t *zhp) 352{ 353 libzfs_handle_t *hdl = zhp->zfs_hdl; 354 nvlist_t *recvdprops; 355 zfs_cmd_t zc = { 0 }; 356 int err; 357 358 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 359 return (-1); 360 361 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 362 363 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 364 if (errno == ENOMEM) { 365 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 366 return (-1); 367 } 368 } else { 369 zcmd_free_nvlists(&zc); 370 return (-1); 371 } 372 } 373 374 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 375 zcmd_free_nvlists(&zc); 376 if (err != 0) 377 return (-1); 378 379 nvlist_free(zhp->zfs_recvd_props); 380 zhp->zfs_recvd_props = recvdprops; 381 382 return (0); 383} 384 385static int 386put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 387{ 388 nvlist_t *allprops, *userprops; 389 390 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 391 392 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 393 return (-1); 394 } 395 396 /* 397 * XXX Why do we store the user props separately, in addition to 398 * storing them in zfs_props? 399 */ 400 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 401 nvlist_free(allprops); 402 return (-1); 403 } 404 405 nvlist_free(zhp->zfs_props); 406 nvlist_free(zhp->zfs_user_props); 407 408 zhp->zfs_props = allprops; 409 zhp->zfs_user_props = userprops; 410 411 return (0); 412} 413 414static int 415get_stats(zfs_handle_t *zhp) 416{ 417 int rc = 0; 418 zfs_cmd_t zc = { 0 }; 419 420 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 421 return (-1); 422 if (get_stats_ioctl(zhp, &zc) != 0) 423 rc = -1; 424 else if (put_stats_zhdl(zhp, &zc) != 0) 425 rc = -1; 426 zcmd_free_nvlists(&zc); 427 return (rc); 428} 429 430/* 431 * Refresh the properties currently stored in the handle. 432 */ 433void 434zfs_refresh_properties(zfs_handle_t *zhp) 435{ 436 (void) get_stats(zhp); 437} 438 439/* 440 * Makes a handle from the given dataset name. Used by zfs_open() and 441 * zfs_iter_* to create child handles on the fly. 442 */ 443static int 444make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 445{ 446 if (put_stats_zhdl(zhp, zc) != 0) 447 return (-1); 448 449 /* 450 * We've managed to open the dataset and gather statistics. Determine 451 * the high-level type. 452 */ 453 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 454 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 455 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 456 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 457 else 458 abort(); 459 460 if (zhp->zfs_dmustats.dds_is_snapshot) 461 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 462 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 463 zhp->zfs_type = ZFS_TYPE_VOLUME; 464 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 465 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 466 else 467 abort(); /* we should never see any other types */ 468 469 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 470 return (-1); 471 472 return (0); 473} 474 475zfs_handle_t * 476make_dataset_handle(libzfs_handle_t *hdl, const char *path) 477{ 478 zfs_cmd_t zc = { 0 }; 479 480 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 481 482 if (zhp == NULL) 483 return (NULL); 484 485 zhp->zfs_hdl = hdl; 486 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 487 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 488 free(zhp); 489 return (NULL); 490 } 491 if (get_stats_ioctl(zhp, &zc) == -1) { 492 zcmd_free_nvlists(&zc); 493 free(zhp); 494 return (NULL); 495 } 496 if (make_dataset_handle_common(zhp, &zc) == -1) { 497 free(zhp); 498 zhp = NULL; 499 } 500 zcmd_free_nvlists(&zc); 501 return (zhp); 502} 503 504zfs_handle_t * 505make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 506{ 507 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 508 509 if (zhp == NULL) 510 return (NULL); 511 512 zhp->zfs_hdl = hdl; 513 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 514 if (make_dataset_handle_common(zhp, zc) == -1) { 515 free(zhp); 516 return (NULL); 517 } 518 return (zhp); 519} 520 521zfs_handle_t * 522make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 523{ 524 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 525 526 if (zhp == NULL) 527 return (NULL); 528 529 zhp->zfs_hdl = pzhp->zfs_hdl; 530 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 531 zhp->zfs_head_type = pzhp->zfs_type; 532 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 533 zhp->zpool_hdl = zpool_handle(zhp); 534 return (zhp); 535} 536 537zfs_handle_t * 538zfs_handle_dup(zfs_handle_t *zhp_orig) 539{ 540 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 541 542 if (zhp == NULL) 543 return (NULL); 544 545 zhp->zfs_hdl = zhp_orig->zfs_hdl; 546 zhp->zpool_hdl = zhp_orig->zpool_hdl; 547 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 548 sizeof (zhp->zfs_name)); 549 zhp->zfs_type = zhp_orig->zfs_type; 550 zhp->zfs_head_type = zhp_orig->zfs_head_type; 551 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 552 if (zhp_orig->zfs_props != NULL) { 553 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 554 (void) no_memory(zhp->zfs_hdl); 555 zfs_close(zhp); 556 return (NULL); 557 } 558 } 559 if (zhp_orig->zfs_user_props != NULL) { 560 if (nvlist_dup(zhp_orig->zfs_user_props, 561 &zhp->zfs_user_props, 0) != 0) { 562 (void) no_memory(zhp->zfs_hdl); 563 zfs_close(zhp); 564 return (NULL); 565 } 566 } 567 if (zhp_orig->zfs_recvd_props != NULL) { 568 if (nvlist_dup(zhp_orig->zfs_recvd_props, 569 &zhp->zfs_recvd_props, 0)) { 570 (void) no_memory(zhp->zfs_hdl); 571 zfs_close(zhp); 572 return (NULL); 573 } 574 } 575 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 576 if (zhp_orig->zfs_mntopts != NULL) { 577 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 578 zhp_orig->zfs_mntopts); 579 } 580 zhp->zfs_props_table = zhp_orig->zfs_props_table; 581 return (zhp); 582} 583 584boolean_t 585zfs_bookmark_exists(const char *path) 586{ 587 nvlist_t *bmarks; 588 nvlist_t *props; 589 char fsname[ZFS_MAXNAMELEN]; 590 char *bmark_name; 591 char *pound; 592 int err; 593 boolean_t rv; 594 595 596 (void) strlcpy(fsname, path, sizeof (fsname)); 597 pound = strchr(fsname, '#'); 598 if (pound == NULL) 599 return (B_FALSE); 600 601 *pound = '\0'; 602 bmark_name = pound + 1; 603 props = fnvlist_alloc(); 604 err = lzc_get_bookmarks(fsname, props, &bmarks); 605 nvlist_free(props); 606 if (err != 0) { 607 nvlist_free(bmarks); 608 return (B_FALSE); 609 } 610 611 rv = nvlist_exists(bmarks, bmark_name); 612 nvlist_free(bmarks); 613 return (rv); 614} 615 616zfs_handle_t * 617make_bookmark_handle(zfs_handle_t *parent, const char *path, 618 nvlist_t *bmark_props) 619{ 620 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 621 622 if (zhp == NULL) 623 return (NULL); 624 625 /* Fill in the name. */ 626 zhp->zfs_hdl = parent->zfs_hdl; 627 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 628 629 /* Set the property lists. */ 630 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 631 free(zhp); 632 return (NULL); 633 } 634 635 /* Set the types. */ 636 zhp->zfs_head_type = parent->zfs_head_type; 637 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 638 639 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 640 nvlist_free(zhp->zfs_props); 641 free(zhp); 642 return (NULL); 643 } 644 645 return (zhp); 646} 647 648/* 649 * Opens the given snapshot, filesystem, or volume. The 'types' 650 * argument is a mask of acceptable types. The function will print an 651 * appropriate error message and return NULL if it can't be opened. 652 */ 653zfs_handle_t * 654zfs_open(libzfs_handle_t *hdl, const char *path, int types) 655{ 656 zfs_handle_t *zhp; 657 char errbuf[1024]; 658 659 (void) snprintf(errbuf, sizeof (errbuf), 660 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 661 662 /* 663 * Validate the name before we even try to open it. 664 */ 665 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) { 666 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 667 "invalid dataset name")); 668 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 669 return (NULL); 670 } 671 672 /* 673 * Try to get stats for the dataset, which will tell us if it exists. 674 */ 675 errno = 0; 676 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 677 (void) zfs_standard_error(hdl, errno, errbuf); 678 return (NULL); 679 } 680 681 if (zhp == NULL) { 682 char *at = strchr(path, '@'); 683 684 if (at != NULL) 685 *at = '\0'; 686 errno = 0; 687 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 688 (void) zfs_standard_error(hdl, errno, errbuf); 689 return (NULL); 690 } 691 if (at != NULL) 692 *at = '@'; 693 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 694 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 695 } 696 697 if (!(types & zhp->zfs_type)) { 698 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 699 zfs_close(zhp); 700 return (NULL); 701 } 702 703 return (zhp); 704} 705 706/* 707 * Release a ZFS handle. Nothing to do but free the associated memory. 708 */ 709void 710zfs_close(zfs_handle_t *zhp) 711{ 712 if (zhp->zfs_mntopts) 713 free(zhp->zfs_mntopts); 714 nvlist_free(zhp->zfs_props); 715 nvlist_free(zhp->zfs_user_props); 716 nvlist_free(zhp->zfs_recvd_props); 717 free(zhp); 718} 719 720typedef struct mnttab_node { 721 struct mnttab mtn_mt; 722 avl_node_t mtn_node; 723} mnttab_node_t; 724 725static int 726libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 727{ 728 const mnttab_node_t *mtn1 = arg1; 729 const mnttab_node_t *mtn2 = arg2; 730 int rv; 731 732 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 733 734 if (rv == 0) 735 return (0); 736 return (rv > 0 ? 1 : -1); 737} 738 739void 740libzfs_mnttab_init(libzfs_handle_t *hdl) 741{ 742 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 743 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 744 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 745} 746 747void 748libzfs_mnttab_update(libzfs_handle_t *hdl) 749{ 750 struct mnttab entry; 751 752 rewind(hdl->libzfs_mnttab); 753 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 754 mnttab_node_t *mtn; 755 756 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 757 continue; 758 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 759 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 760 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 761 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 762 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 763 avl_add(&hdl->libzfs_mnttab_cache, mtn); 764 } 765} 766 767void 768libzfs_mnttab_fini(libzfs_handle_t *hdl) 769{ 770 void *cookie = NULL; 771 mnttab_node_t *mtn; 772 773 while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) { 774 free(mtn->mtn_mt.mnt_special); 775 free(mtn->mtn_mt.mnt_mountp); 776 free(mtn->mtn_mt.mnt_fstype); 777 free(mtn->mtn_mt.mnt_mntopts); 778 free(mtn); 779 } 780 avl_destroy(&hdl->libzfs_mnttab_cache); 781} 782 783void 784libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 785{ 786 hdl->libzfs_mnttab_enable = enable; 787} 788 789int 790libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 791 struct mnttab *entry) 792{ 793 mnttab_node_t find; 794 mnttab_node_t *mtn; 795 796 if (!hdl->libzfs_mnttab_enable) { 797 struct mnttab srch = { 0 }; 798 799 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 800 libzfs_mnttab_fini(hdl); 801 rewind(hdl->libzfs_mnttab); 802 srch.mnt_special = (char *)fsname; 803 srch.mnt_fstype = MNTTYPE_ZFS; 804 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 805 return (0); 806 else 807 return (ENOENT); 808 } 809 810 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 811 libzfs_mnttab_update(hdl); 812 813 find.mtn_mt.mnt_special = (char *)fsname; 814 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 815 if (mtn) { 816 *entry = mtn->mtn_mt; 817 return (0); 818 } 819 return (ENOENT); 820} 821 822void 823libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 824 const char *mountp, const char *mntopts) 825{ 826 mnttab_node_t *mtn; 827 828 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 829 return; 830 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 831 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 832 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 833 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 834 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 835 avl_add(&hdl->libzfs_mnttab_cache, mtn); 836} 837 838void 839libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 840{ 841 mnttab_node_t find; 842 mnttab_node_t *ret; 843 844 find.mtn_mt.mnt_special = (char *)fsname; 845 if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) { 846 avl_remove(&hdl->libzfs_mnttab_cache, ret); 847 free(ret->mtn_mt.mnt_special); 848 free(ret->mtn_mt.mnt_mountp); 849 free(ret->mtn_mt.mnt_fstype); 850 free(ret->mtn_mt.mnt_mntopts); 851 free(ret); 852 } 853} 854 855int 856zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 857{ 858 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 859 860 if (zpool_handle == NULL) 861 return (-1); 862 863 *spa_version = zpool_get_prop_int(zpool_handle, 864 ZPOOL_PROP_VERSION, NULL); 865 return (0); 866} 867 868/* 869 * The choice of reservation property depends on the SPA version. 870 */ 871static int 872zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 873{ 874 int spa_version; 875 876 if (zfs_spa_version(zhp, &spa_version) < 0) 877 return (-1); 878 879 if (spa_version >= SPA_VERSION_REFRESERVATION) 880 *resv_prop = ZFS_PROP_REFRESERVATION; 881 else 882 *resv_prop = ZFS_PROP_RESERVATION; 883 884 return (0); 885} 886 887/* 888 * Given an nvlist of properties to set, validates that they are correct, and 889 * parses any numeric properties (index, boolean, etc) if they are specified as 890 * strings. 891 */ 892nvlist_t * 893zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 894 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 895 const char *errbuf) 896{ 897 nvpair_t *elem; 898 uint64_t intval; 899 char *strval; 900 zfs_prop_t prop; 901 nvlist_t *ret; 902 int chosen_normal = -1; 903 int chosen_utf = -1; 904 905 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 906 (void) no_memory(hdl); 907 return (NULL); 908 } 909 910 /* 911 * Make sure this property is valid and applies to this type. 912 */ 913 914 elem = NULL; 915 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 916 const char *propname = nvpair_name(elem); 917 918 prop = zfs_name_to_prop(propname); 919 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 920 /* 921 * This is a user property: make sure it's a 922 * string, and that it's less than ZAP_MAXNAMELEN. 923 */ 924 if (nvpair_type(elem) != DATA_TYPE_STRING) { 925 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 926 "'%s' must be a string"), propname); 927 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 928 goto error; 929 } 930 931 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 932 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 933 "property name '%s' is too long"), 934 propname); 935 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 936 goto error; 937 } 938 939 (void) nvpair_value_string(elem, &strval); 940 if (nvlist_add_string(ret, propname, strval) != 0) { 941 (void) no_memory(hdl); 942 goto error; 943 } 944 continue; 945 } 946 947 /* 948 * Currently, only user properties can be modified on 949 * snapshots. 950 */ 951 if (type == ZFS_TYPE_SNAPSHOT) { 952 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 953 "this property can not be modified for snapshots")); 954 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 955 goto error; 956 } 957 958 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 959 zfs_userquota_prop_t uqtype; 960 char newpropname[128]; 961 char domain[128]; 962 uint64_t rid; 963 uint64_t valary[3]; 964 965 if (userquota_propname_decode(propname, zoned, 966 &uqtype, domain, sizeof (domain), &rid) != 0) { 967 zfs_error_aux(hdl, 968 dgettext(TEXT_DOMAIN, 969 "'%s' has an invalid user/group name"), 970 propname); 971 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 972 goto error; 973 } 974 975 if (uqtype != ZFS_PROP_USERQUOTA && 976 uqtype != ZFS_PROP_GROUPQUOTA) { 977 zfs_error_aux(hdl, 978 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 979 propname); 980 (void) zfs_error(hdl, EZFS_PROPREADONLY, 981 errbuf); 982 goto error; 983 } 984 985 if (nvpair_type(elem) == DATA_TYPE_STRING) { 986 (void) nvpair_value_string(elem, &strval); 987 if (strcmp(strval, "none") == 0) { 988 intval = 0; 989 } else if (zfs_nicestrtonum(hdl, 990 strval, &intval) != 0) { 991 (void) zfs_error(hdl, 992 EZFS_BADPROP, errbuf); 993 goto error; 994 } 995 } else if (nvpair_type(elem) == 996 DATA_TYPE_UINT64) { 997 (void) nvpair_value_uint64(elem, &intval); 998 if (intval == 0) { 999 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1000 "use 'none' to disable " 1001 "userquota/groupquota")); 1002 goto error; 1003 } 1004 } else { 1005 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1006 "'%s' must be a number"), propname); 1007 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1008 goto error; 1009 } 1010 1011 /* 1012 * Encode the prop name as 1013 * userquota@<hex-rid>-domain, to make it easy 1014 * for the kernel to decode. 1015 */ 1016 (void) snprintf(newpropname, sizeof (newpropname), 1017 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 1018 (longlong_t)rid, domain); 1019 valary[0] = uqtype; 1020 valary[1] = rid; 1021 valary[2] = intval; 1022 if (nvlist_add_uint64_array(ret, newpropname, 1023 valary, 3) != 0) { 1024 (void) no_memory(hdl); 1025 goto error; 1026 } 1027 continue; 1028 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 1029 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1030 "'%s' is readonly"), 1031 propname); 1032 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1033 goto error; 1034 } 1035 1036 if (prop == ZPROP_INVAL) { 1037 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1038 "invalid property '%s'"), propname); 1039 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1040 goto error; 1041 } 1042 1043 if (!zfs_prop_valid_for_type(prop, type)) { 1044 zfs_error_aux(hdl, 1045 dgettext(TEXT_DOMAIN, "'%s' does not " 1046 "apply to datasets of this type"), propname); 1047 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1048 goto error; 1049 } 1050 1051 if (zfs_prop_readonly(prop) && 1052 (!zfs_prop_setonce(prop) || zhp != NULL)) { 1053 zfs_error_aux(hdl, 1054 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1055 propname); 1056 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1057 goto error; 1058 } 1059 1060 if (zprop_parse_value(hdl, elem, prop, type, ret, 1061 &strval, &intval, errbuf) != 0) 1062 goto error; 1063 1064 /* 1065 * Perform some additional checks for specific properties. 1066 */ 1067 switch (prop) { 1068 case ZFS_PROP_VERSION: 1069 { 1070 int version; 1071 1072 if (zhp == NULL) 1073 break; 1074 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1075 if (intval < version) { 1076 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1077 "Can not downgrade; already at version %u"), 1078 version); 1079 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1080 goto error; 1081 } 1082 break; 1083 } 1084 1085 case ZFS_PROP_VOLBLOCKSIZE: 1086 case ZFS_PROP_RECORDSIZE: 1087 { 1088 int maxbs = SPA_MAXBLOCKSIZE; 1089 if (zpool_hdl != NULL) { 1090 maxbs = zpool_get_prop_int(zpool_hdl, 1091 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1092 } 1093 /* 1094 * Volumes are limited to a volblocksize of 128KB, 1095 * because they typically service workloads with 1096 * small random writes, which incur a large performance 1097 * penalty with large blocks. 1098 */ 1099 if (prop == ZFS_PROP_VOLBLOCKSIZE) 1100 maxbs = SPA_OLD_MAXBLOCKSIZE; 1101 /* 1102 * The value must be a power of two between 1103 * SPA_MINBLOCKSIZE and maxbs. 1104 */ 1105 if (intval < SPA_MINBLOCKSIZE || 1106 intval > maxbs || !ISP2(intval)) { 1107 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1108 "'%s' must be power of 2 from 512B " 1109 "to %uKB"), propname, maxbs >> 10); 1110 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1111 goto error; 1112 } 1113 break; 1114 } 1115 case ZFS_PROP_MLSLABEL: 1116 { 1117#ifdef illumos 1118 /* 1119 * Verify the mlslabel string and convert to 1120 * internal hex label string. 1121 */ 1122 1123 m_label_t *new_sl; 1124 char *hex = NULL; /* internal label string */ 1125 1126 /* Default value is already OK. */ 1127 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1128 break; 1129 1130 /* Verify the label can be converted to binary form */ 1131 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1132 (str_to_label(strval, &new_sl, MAC_LABEL, 1133 L_NO_CORRECTION, NULL) == -1)) { 1134 goto badlabel; 1135 } 1136 1137 /* Now translate to hex internal label string */ 1138 if (label_to_str(new_sl, &hex, M_INTERNAL, 1139 DEF_NAMES) != 0) { 1140 if (hex) 1141 free(hex); 1142 goto badlabel; 1143 } 1144 m_label_free(new_sl); 1145 1146 /* If string is already in internal form, we're done. */ 1147 if (strcmp(strval, hex) == 0) { 1148 free(hex); 1149 break; 1150 } 1151 1152 /* Replace the label string with the internal form. */ 1153 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1154 DATA_TYPE_STRING); 1155 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1156 hex) == 0); 1157 free(hex); 1158 1159 break; 1160 1161badlabel: 1162 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1163 "invalid mlslabel '%s'"), strval); 1164 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1165 m_label_free(new_sl); /* OK if null */ 1166#else /* !illumos */ 1167 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1168 "mlslabel is not supported on FreeBSD")); 1169 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1170#endif /* illumos */ 1171 goto error; 1172 1173 } 1174 1175 case ZFS_PROP_MOUNTPOINT: 1176 { 1177 namecheck_err_t why; 1178 1179 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1180 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1181 break; 1182 1183 if (mountpoint_namecheck(strval, &why)) { 1184 switch (why) { 1185 case NAME_ERR_LEADING_SLASH: 1186 zfs_error_aux(hdl, 1187 dgettext(TEXT_DOMAIN, 1188 "'%s' must be an absolute path, " 1189 "'none', or 'legacy'"), propname); 1190 break; 1191 case NAME_ERR_TOOLONG: 1192 zfs_error_aux(hdl, 1193 dgettext(TEXT_DOMAIN, 1194 "component of '%s' is too long"), 1195 propname); 1196 break; 1197 } 1198 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1199 goto error; 1200 } 1201 } 1202 1203 /*FALLTHRU*/ 1204 1205 case ZFS_PROP_SHARESMB: 1206 case ZFS_PROP_SHARENFS: 1207 /* 1208 * For the mountpoint and sharenfs or sharesmb 1209 * properties, check if it can be set in a 1210 * global/non-global zone based on 1211 * the zoned property value: 1212 * 1213 * global zone non-global zone 1214 * -------------------------------------------------- 1215 * zoned=on mountpoint (no) mountpoint (yes) 1216 * sharenfs (no) sharenfs (no) 1217 * sharesmb (no) sharesmb (no) 1218 * 1219 * zoned=off mountpoint (yes) N/A 1220 * sharenfs (yes) 1221 * sharesmb (yes) 1222 */ 1223 if (zoned) { 1224 if (getzoneid() == GLOBAL_ZONEID) { 1225 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1226 "'%s' cannot be set on " 1227 "dataset in a non-global zone"), 1228 propname); 1229 (void) zfs_error(hdl, EZFS_ZONED, 1230 errbuf); 1231 goto error; 1232 } else if (prop == ZFS_PROP_SHARENFS || 1233 prop == ZFS_PROP_SHARESMB) { 1234 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1235 "'%s' cannot be set in " 1236 "a non-global zone"), propname); 1237 (void) zfs_error(hdl, EZFS_ZONED, 1238 errbuf); 1239 goto error; 1240 } 1241 } else if (getzoneid() != GLOBAL_ZONEID) { 1242 /* 1243 * If zoned property is 'off', this must be in 1244 * a global zone. If not, something is wrong. 1245 */ 1246 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1247 "'%s' cannot be set while dataset " 1248 "'zoned' property is set"), propname); 1249 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1250 goto error; 1251 } 1252 1253 /* 1254 * At this point, it is legitimate to set the 1255 * property. Now we want to make sure that the 1256 * property value is valid if it is sharenfs. 1257 */ 1258 if ((prop == ZFS_PROP_SHARENFS || 1259 prop == ZFS_PROP_SHARESMB) && 1260 strcmp(strval, "on") != 0 && 1261 strcmp(strval, "off") != 0) { 1262 zfs_share_proto_t proto; 1263 1264 if (prop == ZFS_PROP_SHARESMB) 1265 proto = PROTO_SMB; 1266 else 1267 proto = PROTO_NFS; 1268 1269 /* 1270 * Must be an valid sharing protocol 1271 * option string so init the libshare 1272 * in order to enable the parser and 1273 * then parse the options. We use the 1274 * control API since we don't care about 1275 * the current configuration and don't 1276 * want the overhead of loading it 1277 * until we actually do something. 1278 */ 1279 1280 if (zfs_init_libshare(hdl, 1281 SA_INIT_CONTROL_API) != SA_OK) { 1282 /* 1283 * An error occurred so we can't do 1284 * anything 1285 */ 1286 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1287 "'%s' cannot be set: problem " 1288 "in share initialization"), 1289 propname); 1290 (void) zfs_error(hdl, EZFS_BADPROP, 1291 errbuf); 1292 goto error; 1293 } 1294 1295 if (zfs_parse_options(strval, proto) != SA_OK) { 1296 /* 1297 * There was an error in parsing so 1298 * deal with it by issuing an error 1299 * message and leaving after 1300 * uninitializing the the libshare 1301 * interface. 1302 */ 1303 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1304 "'%s' cannot be set to invalid " 1305 "options"), propname); 1306 (void) zfs_error(hdl, EZFS_BADPROP, 1307 errbuf); 1308 zfs_uninit_libshare(hdl); 1309 goto error; 1310 } 1311 zfs_uninit_libshare(hdl); 1312 } 1313 1314 break; 1315 case ZFS_PROP_UTF8ONLY: 1316 chosen_utf = (int)intval; 1317 break; 1318 case ZFS_PROP_NORMALIZE: 1319 chosen_normal = (int)intval; 1320 break; 1321 } 1322 1323 /* 1324 * For changes to existing volumes, we have some additional 1325 * checks to enforce. 1326 */ 1327 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1328 uint64_t volsize = zfs_prop_get_int(zhp, 1329 ZFS_PROP_VOLSIZE); 1330 uint64_t blocksize = zfs_prop_get_int(zhp, 1331 ZFS_PROP_VOLBLOCKSIZE); 1332 char buf[64]; 1333 1334 switch (prop) { 1335 case ZFS_PROP_RESERVATION: 1336 case ZFS_PROP_REFRESERVATION: 1337 if (intval > volsize) { 1338 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1339 "'%s' is greater than current " 1340 "volume size"), propname); 1341 (void) zfs_error(hdl, EZFS_BADPROP, 1342 errbuf); 1343 goto error; 1344 } 1345 break; 1346 1347 case ZFS_PROP_VOLSIZE: 1348 if (intval % blocksize != 0) { 1349 zfs_nicenum(blocksize, buf, 1350 sizeof (buf)); 1351 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1352 "'%s' must be a multiple of " 1353 "volume block size (%s)"), 1354 propname, buf); 1355 (void) zfs_error(hdl, EZFS_BADPROP, 1356 errbuf); 1357 goto error; 1358 } 1359 1360 if (intval == 0) { 1361 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1362 "'%s' cannot be zero"), 1363 propname); 1364 (void) zfs_error(hdl, EZFS_BADPROP, 1365 errbuf); 1366 goto error; 1367 } 1368 break; 1369 } 1370 } 1371 } 1372 1373 /* 1374 * If normalization was chosen, but no UTF8 choice was made, 1375 * enforce rejection of non-UTF8 names. 1376 * 1377 * If normalization was chosen, but rejecting non-UTF8 names 1378 * was explicitly not chosen, it is an error. 1379 */ 1380 if (chosen_normal > 0 && chosen_utf < 0) { 1381 if (nvlist_add_uint64(ret, 1382 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1383 (void) no_memory(hdl); 1384 goto error; 1385 } 1386 } else if (chosen_normal > 0 && chosen_utf == 0) { 1387 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1388 "'%s' must be set 'on' if normalization chosen"), 1389 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1390 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1391 goto error; 1392 } 1393 return (ret); 1394 1395error: 1396 nvlist_free(ret); 1397 return (NULL); 1398} 1399 1400int 1401zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1402{ 1403 uint64_t old_volsize; 1404 uint64_t new_volsize; 1405 uint64_t old_reservation; 1406 uint64_t new_reservation; 1407 zfs_prop_t resv_prop; 1408 nvlist_t *props; 1409 1410 /* 1411 * If this is an existing volume, and someone is setting the volsize, 1412 * make sure that it matches the reservation, or add it if necessary. 1413 */ 1414 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1415 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1416 return (-1); 1417 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1418 1419 props = fnvlist_alloc(); 1420 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1421 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1422 1423 if ((zvol_volsize_to_reservation(old_volsize, props) != 1424 old_reservation) || nvlist_exists(nvl, 1425 zfs_prop_to_name(resv_prop))) { 1426 fnvlist_free(props); 1427 return (0); 1428 } 1429 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1430 &new_volsize) != 0) { 1431 fnvlist_free(props); 1432 return (-1); 1433 } 1434 new_reservation = zvol_volsize_to_reservation(new_volsize, props); 1435 fnvlist_free(props); 1436 1437 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1438 new_reservation) != 0) { 1439 (void) no_memory(zhp->zfs_hdl); 1440 return (-1); 1441 } 1442 return (1); 1443} 1444 1445void 1446zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1447 char *errbuf) 1448{ 1449 switch (err) { 1450 1451 case ENOSPC: 1452 /* 1453 * For quotas and reservations, ENOSPC indicates 1454 * something different; setting a quota or reservation 1455 * doesn't use any disk space. 1456 */ 1457 switch (prop) { 1458 case ZFS_PROP_QUOTA: 1459 case ZFS_PROP_REFQUOTA: 1460 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1461 "size is less than current used or " 1462 "reserved space")); 1463 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1464 break; 1465 1466 case ZFS_PROP_RESERVATION: 1467 case ZFS_PROP_REFRESERVATION: 1468 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1469 "size is greater than available space")); 1470 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1471 break; 1472 1473 default: 1474 (void) zfs_standard_error(hdl, err, errbuf); 1475 break; 1476 } 1477 break; 1478 1479 case EBUSY: 1480 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1481 break; 1482 1483 case EROFS: 1484 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1485 break; 1486 1487 case ENOTSUP: 1488 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1489 "pool and or dataset must be upgraded to set this " 1490 "property or value")); 1491 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1492 break; 1493 1494 case ERANGE: 1495 case EDOM: 1496 if (prop == ZFS_PROP_COMPRESSION || 1497 prop == ZFS_PROP_RECORDSIZE) { 1498 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1499 "property setting is not allowed on " 1500 "bootable datasets")); 1501 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1502 } else if (prop == ZFS_PROP_CHECKSUM || 1503 prop == ZFS_PROP_DEDUP) { 1504 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1505 "property setting is not allowed on " 1506 "root pools")); 1507 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1508 } else { 1509 (void) zfs_standard_error(hdl, err, errbuf); 1510 } 1511 break; 1512 1513 case EINVAL: 1514 if (prop == ZPROP_INVAL) { 1515 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1516 } else { 1517 (void) zfs_standard_error(hdl, err, errbuf); 1518 } 1519 break; 1520 1521 case EOVERFLOW: 1522 /* 1523 * This platform can't address a volume this big. 1524 */ 1525#ifdef _ILP32 1526 if (prop == ZFS_PROP_VOLSIZE) { 1527 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1528 break; 1529 } 1530#endif 1531 /* FALLTHROUGH */ 1532 default: 1533 (void) zfs_standard_error(hdl, err, errbuf); 1534 } 1535} 1536 1537/* 1538 * Given a property name and value, set the property for the given dataset. 1539 */ 1540int 1541zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1542{ 1543 int ret = -1; 1544 char errbuf[1024]; 1545 libzfs_handle_t *hdl = zhp->zfs_hdl; 1546 nvlist_t *nvl = NULL; 1547 1548 (void) snprintf(errbuf, sizeof (errbuf), 1549 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1550 zhp->zfs_name); 1551 1552 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1553 nvlist_add_string(nvl, propname, propval) != 0) { 1554 (void) no_memory(hdl); 1555 goto error; 1556 } 1557 1558 ret = zfs_prop_set_list(zhp, nvl); 1559 1560error: 1561 nvlist_free(nvl); 1562 return (ret); 1563} 1564 1565 1566 1567/* 1568 * Given an nvlist of property names and values, set the properties for the 1569 * given dataset. 1570 */ 1571int 1572zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1573{ 1574 zfs_cmd_t zc = { 0 }; 1575 int ret = -1; 1576 prop_changelist_t **cls = NULL; 1577 int cl_idx; 1578 char errbuf[1024]; 1579 libzfs_handle_t *hdl = zhp->zfs_hdl; 1580 nvlist_t *nvl; 1581 int nvl_len; 1582 int added_resv; 1583 1584 (void) snprintf(errbuf, sizeof (errbuf), 1585 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1586 zhp->zfs_name); 1587 1588 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1589 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1590 errbuf)) == NULL) 1591 goto error; 1592 1593 /* 1594 * We have to check for any extra properties which need to be added 1595 * before computing the length of the nvlist. 1596 */ 1597 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1598 elem != NULL; 1599 elem = nvlist_next_nvpair(nvl, elem)) { 1600 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1601 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1602 goto error; 1603 } 1604 } 1605 /* 1606 * Check how many properties we're setting and allocate an array to 1607 * store changelist pointers for postfix(). 1608 */ 1609 nvl_len = 0; 1610 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1611 elem != NULL; 1612 elem = nvlist_next_nvpair(nvl, elem)) 1613 nvl_len++; 1614 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1615 goto error; 1616 1617 cl_idx = 0; 1618 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1619 elem != NULL; 1620 elem = nvlist_next_nvpair(nvl, elem)) { 1621 1622 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1623 1624 assert(cl_idx < nvl_len); 1625 /* 1626 * We don't want to unmount & remount the dataset when changing 1627 * its canmount property to 'on' or 'noauto'. We only use 1628 * the changelist logic to unmount when setting canmount=off. 1629 */ 1630 if (!(prop == ZFS_PROP_CANMOUNT && 1631 fnvpair_value_uint64(elem) != ZFS_CANMOUNT_OFF)) { 1632 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1633 if (cls[cl_idx] == NULL) 1634 goto error; 1635 } 1636 1637 if (prop == ZFS_PROP_MOUNTPOINT && 1638 changelist_haszonedchild(cls[cl_idx])) { 1639 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1640 "child dataset with inherited mountpoint is used " 1641 "in a non-global zone")); 1642 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1643 goto error; 1644 } 1645 1646 /* We don't support those properties on FreeBSD. */ 1647 switch (prop) { 1648 case ZFS_PROP_DEVICES: 1649 case ZFS_PROP_ISCSIOPTIONS: 1650 case ZFS_PROP_XATTR: 1651 case ZFS_PROP_VSCAN: 1652 case ZFS_PROP_NBMAND: 1653 case ZFS_PROP_MLSLABEL: 1654 (void) snprintf(errbuf, sizeof (errbuf), 1655 "property '%s' not supported on FreeBSD", 1656 nvpair_name(elem)); 1657 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1658 goto error; 1659 } 1660 1661 if (cls[cl_idx] != NULL && 1662 (ret = changelist_prefix(cls[cl_idx])) != 0) 1663 goto error; 1664 1665 cl_idx++; 1666 } 1667 assert(cl_idx == nvl_len); 1668 1669 /* 1670 * Execute the corresponding ioctl() to set this list of properties. 1671 */ 1672 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1673 1674 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1675 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1676 goto error; 1677 1678 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1679 1680 if (ret != 0) { 1681 /* Get the list of unset properties back and report them. */ 1682 nvlist_t *errorprops = NULL; 1683 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1684 goto error; 1685 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1686 elem != NULL; 1687 elem = nvlist_next_nvpair(nvl, elem)) { 1688 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1689 zfs_setprop_error(hdl, prop, errno, errbuf); 1690 } 1691 nvlist_free(errorprops); 1692 1693 if (added_resv && errno == ENOSPC) { 1694 /* clean up the volsize property we tried to set */ 1695 uint64_t old_volsize = zfs_prop_get_int(zhp, 1696 ZFS_PROP_VOLSIZE); 1697 nvlist_free(nvl); 1698 nvl = NULL; 1699 zcmd_free_nvlists(&zc); 1700 1701 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1702 goto error; 1703 if (nvlist_add_uint64(nvl, 1704 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1705 old_volsize) != 0) 1706 goto error; 1707 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1708 goto error; 1709 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1710 } 1711 } else { 1712 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1713 if (cls[cl_idx] != NULL) { 1714 int clp_err = changelist_postfix(cls[cl_idx]); 1715 if (clp_err != 0) 1716 ret = clp_err; 1717 } 1718 } 1719 1720 /* 1721 * Refresh the statistics so the new property value 1722 * is reflected. 1723 */ 1724 if (ret == 0) 1725 (void) get_stats(zhp); 1726 } 1727 1728error: 1729 nvlist_free(nvl); 1730 zcmd_free_nvlists(&zc); 1731 if (cls != NULL) { 1732 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1733 if (cls[cl_idx] != NULL) 1734 changelist_free(cls[cl_idx]); 1735 } 1736 free(cls); 1737 } 1738 return (ret); 1739} 1740 1741/* 1742 * Given a property, inherit the value from the parent dataset, or if received 1743 * is TRUE, revert to the received value, if any. 1744 */ 1745int 1746zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1747{ 1748 zfs_cmd_t zc = { 0 }; 1749 int ret; 1750 prop_changelist_t *cl; 1751 libzfs_handle_t *hdl = zhp->zfs_hdl; 1752 char errbuf[1024]; 1753 zfs_prop_t prop; 1754 1755 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1756 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1757 1758 zc.zc_cookie = received; 1759 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1760 /* 1761 * For user properties, the amount of work we have to do is very 1762 * small, so just do it here. 1763 */ 1764 if (!zfs_prop_user(propname)) { 1765 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1766 "invalid property")); 1767 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1768 } 1769 1770 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1771 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1772 1773 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1774 return (zfs_standard_error(hdl, errno, errbuf)); 1775 1776 return (0); 1777 } 1778 1779 /* 1780 * Verify that this property is inheritable. 1781 */ 1782 if (zfs_prop_readonly(prop)) 1783 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1784 1785 if (!zfs_prop_inheritable(prop) && !received) 1786 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1787 1788 /* 1789 * Check to see if the value applies to this type 1790 */ 1791 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1792 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1793 1794 /* 1795 * Normalize the name, to get rid of shorthand abbreviations. 1796 */ 1797 propname = zfs_prop_to_name(prop); 1798 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1799 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1800 1801 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1802 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1803 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1804 "dataset is used in a non-global zone")); 1805 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1806 } 1807 1808 /* 1809 * Determine datasets which will be affected by this change, if any. 1810 */ 1811 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1812 return (-1); 1813 1814 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1815 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1816 "child dataset with inherited mountpoint is used " 1817 "in a non-global zone")); 1818 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1819 goto error; 1820 } 1821 1822 if ((ret = changelist_prefix(cl)) != 0) 1823 goto error; 1824 1825 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1826 return (zfs_standard_error(hdl, errno, errbuf)); 1827 } else { 1828 1829 if ((ret = changelist_postfix(cl)) != 0) 1830 goto error; 1831 1832 /* 1833 * Refresh the statistics so the new property is reflected. 1834 */ 1835 (void) get_stats(zhp); 1836 } 1837 1838error: 1839 changelist_free(cl); 1840 return (ret); 1841} 1842 1843/* 1844 * True DSL properties are stored in an nvlist. The following two functions 1845 * extract them appropriately. 1846 */ 1847static uint64_t 1848getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1849{ 1850 nvlist_t *nv; 1851 uint64_t value; 1852 1853 *source = NULL; 1854 if (nvlist_lookup_nvlist(zhp->zfs_props, 1855 zfs_prop_to_name(prop), &nv) == 0) { 1856 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1857 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1858 } else { 1859 verify(!zhp->zfs_props_table || 1860 zhp->zfs_props_table[prop] == B_TRUE); 1861 value = zfs_prop_default_numeric(prop); 1862 *source = ""; 1863 } 1864 1865 return (value); 1866} 1867 1868static const char * 1869getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1870{ 1871 nvlist_t *nv; 1872 const char *value; 1873 1874 *source = NULL; 1875 if (nvlist_lookup_nvlist(zhp->zfs_props, 1876 zfs_prop_to_name(prop), &nv) == 0) { 1877 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 1878 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1879 } else { 1880 verify(!zhp->zfs_props_table || 1881 zhp->zfs_props_table[prop] == B_TRUE); 1882 value = zfs_prop_default_string(prop); 1883 *source = ""; 1884 } 1885 1886 return (value); 1887} 1888 1889static boolean_t 1890zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1891{ 1892 return (zhp->zfs_props == zhp->zfs_recvd_props); 1893} 1894 1895static void 1896zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1897{ 1898 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1899 zhp->zfs_props = zhp->zfs_recvd_props; 1900} 1901 1902static void 1903zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1904{ 1905 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1906 *cookie = 0; 1907} 1908 1909/* 1910 * Internal function for getting a numeric property. Both zfs_prop_get() and 1911 * zfs_prop_get_int() are built using this interface. 1912 * 1913 * Certain properties can be overridden using 'mount -o'. In this case, scan 1914 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1915 * If they differ from the on-disk values, report the current values and mark 1916 * the source "temporary". 1917 */ 1918static int 1919get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1920 char **source, uint64_t *val) 1921{ 1922 zfs_cmd_t zc = { 0 }; 1923 nvlist_t *zplprops = NULL; 1924 struct mnttab mnt; 1925 char *mntopt_on = NULL; 1926 char *mntopt_off = NULL; 1927 boolean_t received = zfs_is_recvd_props_mode(zhp); 1928 1929 *source = NULL; 1930 1931 switch (prop) { 1932 case ZFS_PROP_ATIME: 1933 mntopt_on = MNTOPT_ATIME; 1934 mntopt_off = MNTOPT_NOATIME; 1935 break; 1936 1937 case ZFS_PROP_DEVICES: 1938 mntopt_on = MNTOPT_DEVICES; 1939 mntopt_off = MNTOPT_NODEVICES; 1940 break; 1941 1942 case ZFS_PROP_EXEC: 1943 mntopt_on = MNTOPT_EXEC; 1944 mntopt_off = MNTOPT_NOEXEC; 1945 break; 1946 1947 case ZFS_PROP_READONLY: 1948 mntopt_on = MNTOPT_RO; 1949 mntopt_off = MNTOPT_RW; 1950 break; 1951 1952 case ZFS_PROP_SETUID: 1953 mntopt_on = MNTOPT_SETUID; 1954 mntopt_off = MNTOPT_NOSETUID; 1955 break; 1956 1957 case ZFS_PROP_XATTR: 1958 mntopt_on = MNTOPT_XATTR; 1959 mntopt_off = MNTOPT_NOXATTR; 1960 break; 1961 1962 case ZFS_PROP_NBMAND: 1963 mntopt_on = MNTOPT_NBMAND; 1964 mntopt_off = MNTOPT_NONBMAND; 1965 break; 1966 } 1967 1968 /* 1969 * Because looking up the mount options is potentially expensive 1970 * (iterating over all of /etc/mnttab), we defer its calculation until 1971 * we're looking up a property which requires its presence. 1972 */ 1973 if (!zhp->zfs_mntcheck && 1974 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1975 libzfs_handle_t *hdl = zhp->zfs_hdl; 1976 struct mnttab entry; 1977 1978 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1979 zhp->zfs_mntopts = zfs_strdup(hdl, 1980 entry.mnt_mntopts); 1981 if (zhp->zfs_mntopts == NULL) 1982 return (-1); 1983 } 1984 1985 zhp->zfs_mntcheck = B_TRUE; 1986 } 1987 1988 if (zhp->zfs_mntopts == NULL) 1989 mnt.mnt_mntopts = ""; 1990 else 1991 mnt.mnt_mntopts = zhp->zfs_mntopts; 1992 1993 switch (prop) { 1994 case ZFS_PROP_ATIME: 1995 case ZFS_PROP_DEVICES: 1996 case ZFS_PROP_EXEC: 1997 case ZFS_PROP_READONLY: 1998 case ZFS_PROP_SETUID: 1999 case ZFS_PROP_XATTR: 2000 case ZFS_PROP_NBMAND: 2001 *val = getprop_uint64(zhp, prop, source); 2002 2003 if (received) 2004 break; 2005 2006 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2007 *val = B_TRUE; 2008 if (src) 2009 *src = ZPROP_SRC_TEMPORARY; 2010 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2011 *val = B_FALSE; 2012 if (src) 2013 *src = ZPROP_SRC_TEMPORARY; 2014 } 2015 break; 2016 2017 case ZFS_PROP_CANMOUNT: 2018 case ZFS_PROP_VOLSIZE: 2019 case ZFS_PROP_QUOTA: 2020 case ZFS_PROP_REFQUOTA: 2021 case ZFS_PROP_RESERVATION: 2022 case ZFS_PROP_REFRESERVATION: 2023 case ZFS_PROP_FILESYSTEM_LIMIT: 2024 case ZFS_PROP_SNAPSHOT_LIMIT: 2025 case ZFS_PROP_FILESYSTEM_COUNT: 2026 case ZFS_PROP_SNAPSHOT_COUNT: 2027 *val = getprop_uint64(zhp, prop, source); 2028 2029 if (*source == NULL) { 2030 /* not default, must be local */ 2031 *source = zhp->zfs_name; 2032 } 2033 break; 2034 2035 case ZFS_PROP_MOUNTED: 2036 *val = (zhp->zfs_mntopts != NULL); 2037 break; 2038 2039 case ZFS_PROP_NUMCLONES: 2040 *val = zhp->zfs_dmustats.dds_num_clones; 2041 break; 2042 2043 case ZFS_PROP_VERSION: 2044 case ZFS_PROP_NORMALIZE: 2045 case ZFS_PROP_UTF8ONLY: 2046 case ZFS_PROP_CASE: 2047 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2048 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2049 return (-1); 2050 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2051 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2052 zcmd_free_nvlists(&zc); 2053 return (-1); 2054 } 2055 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2056 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2057 val) != 0) { 2058 zcmd_free_nvlists(&zc); 2059 return (-1); 2060 } 2061 if (zplprops) 2062 nvlist_free(zplprops); 2063 zcmd_free_nvlists(&zc); 2064 break; 2065 2066 case ZFS_PROP_INCONSISTENT: 2067 *val = zhp->zfs_dmustats.dds_inconsistent; 2068 break; 2069 2070 default: 2071 switch (zfs_prop_get_type(prop)) { 2072 case PROP_TYPE_NUMBER: 2073 case PROP_TYPE_INDEX: 2074 *val = getprop_uint64(zhp, prop, source); 2075 /* 2076 * If we tried to use a default value for a 2077 * readonly property, it means that it was not 2078 * present. 2079 */ 2080 if (zfs_prop_readonly(prop) && 2081 *source != NULL && (*source)[0] == '\0') { 2082 *source = NULL; 2083 } 2084 break; 2085 2086 case PROP_TYPE_STRING: 2087 default: 2088 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2089 "cannot get non-numeric property")); 2090 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2091 dgettext(TEXT_DOMAIN, "internal error"))); 2092 } 2093 } 2094 2095 return (0); 2096} 2097 2098/* 2099 * Calculate the source type, given the raw source string. 2100 */ 2101static void 2102get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2103 char *statbuf, size_t statlen) 2104{ 2105 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2106 return; 2107 2108 if (source == NULL) { 2109 *srctype = ZPROP_SRC_NONE; 2110 } else if (source[0] == '\0') { 2111 *srctype = ZPROP_SRC_DEFAULT; 2112 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2113 *srctype = ZPROP_SRC_RECEIVED; 2114 } else { 2115 if (strcmp(source, zhp->zfs_name) == 0) { 2116 *srctype = ZPROP_SRC_LOCAL; 2117 } else { 2118 (void) strlcpy(statbuf, source, statlen); 2119 *srctype = ZPROP_SRC_INHERITED; 2120 } 2121 } 2122 2123} 2124 2125int 2126zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2127 size_t proplen, boolean_t literal) 2128{ 2129 zfs_prop_t prop; 2130 int err = 0; 2131 2132 if (zhp->zfs_recvd_props == NULL) 2133 if (get_recvd_props_ioctl(zhp) != 0) 2134 return (-1); 2135 2136 prop = zfs_name_to_prop(propname); 2137 2138 if (prop != ZPROP_INVAL) { 2139 uint64_t cookie; 2140 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2141 return (-1); 2142 zfs_set_recvd_props_mode(zhp, &cookie); 2143 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2144 NULL, NULL, 0, literal); 2145 zfs_unset_recvd_props_mode(zhp, &cookie); 2146 } else { 2147 nvlist_t *propval; 2148 char *recvdval; 2149 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2150 propname, &propval) != 0) 2151 return (-1); 2152 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2153 &recvdval) == 0); 2154 (void) strlcpy(propbuf, recvdval, proplen); 2155 } 2156 2157 return (err == 0 ? 0 : -1); 2158} 2159 2160static int 2161get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2162{ 2163 nvlist_t *value; 2164 nvpair_t *pair; 2165 2166 value = zfs_get_clones_nvl(zhp); 2167 if (value == NULL) 2168 return (-1); 2169 2170 propbuf[0] = '\0'; 2171 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2172 pair = nvlist_next_nvpair(value, pair)) { 2173 if (propbuf[0] != '\0') 2174 (void) strlcat(propbuf, ",", proplen); 2175 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2176 } 2177 2178 return (0); 2179} 2180 2181struct get_clones_arg { 2182 uint64_t numclones; 2183 nvlist_t *value; 2184 const char *origin; 2185 char buf[ZFS_MAXNAMELEN]; 2186}; 2187 2188int 2189get_clones_cb(zfs_handle_t *zhp, void *arg) 2190{ 2191 struct get_clones_arg *gca = arg; 2192 2193 if (gca->numclones == 0) { 2194 zfs_close(zhp); 2195 return (0); 2196 } 2197 2198 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2199 NULL, NULL, 0, B_TRUE) != 0) 2200 goto out; 2201 if (strcmp(gca->buf, gca->origin) == 0) { 2202 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2203 gca->numclones--; 2204 } 2205 2206out: 2207 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2208 zfs_close(zhp); 2209 return (0); 2210} 2211 2212nvlist_t * 2213zfs_get_clones_nvl(zfs_handle_t *zhp) 2214{ 2215 nvlist_t *nv, *value; 2216 2217 if (nvlist_lookup_nvlist(zhp->zfs_props, 2218 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2219 struct get_clones_arg gca; 2220 2221 /* 2222 * if this is a snapshot, then the kernel wasn't able 2223 * to get the clones. Do it by slowly iterating. 2224 */ 2225 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2226 return (NULL); 2227 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2228 return (NULL); 2229 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2230 nvlist_free(nv); 2231 return (NULL); 2232 } 2233 2234 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2235 gca.value = value; 2236 gca.origin = zhp->zfs_name; 2237 2238 if (gca.numclones != 0) { 2239 zfs_handle_t *root; 2240 char pool[ZFS_MAXNAMELEN]; 2241 char *cp = pool; 2242 2243 /* get the pool name */ 2244 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2245 (void) strsep(&cp, "/@"); 2246 root = zfs_open(zhp->zfs_hdl, pool, 2247 ZFS_TYPE_FILESYSTEM); 2248 2249 (void) get_clones_cb(root, &gca); 2250 } 2251 2252 if (gca.numclones != 0 || 2253 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2254 nvlist_add_nvlist(zhp->zfs_props, 2255 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2256 nvlist_free(nv); 2257 nvlist_free(value); 2258 return (NULL); 2259 } 2260 nvlist_free(nv); 2261 nvlist_free(value); 2262 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2263 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2264 } 2265 2266 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2267 2268 return (value); 2269} 2270 2271/* 2272 * Retrieve a property from the given object. If 'literal' is specified, then 2273 * numbers are left as exact values. Otherwise, numbers are converted to a 2274 * human-readable form. 2275 * 2276 * Returns 0 on success, or -1 on error. 2277 */ 2278int 2279zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2280 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2281{ 2282 char *source = NULL; 2283 uint64_t val; 2284 const char *str; 2285 const char *strval; 2286 boolean_t received = zfs_is_recvd_props_mode(zhp); 2287 2288 /* 2289 * Check to see if this property applies to our object 2290 */ 2291 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2292 return (-1); 2293 2294 if (received && zfs_prop_readonly(prop)) 2295 return (-1); 2296 2297 if (src) 2298 *src = ZPROP_SRC_NONE; 2299 2300 switch (prop) { 2301 case ZFS_PROP_CREATION: 2302 /* 2303 * 'creation' is a time_t stored in the statistics. We convert 2304 * this into a string unless 'literal' is specified. 2305 */ 2306 { 2307 val = getprop_uint64(zhp, prop, &source); 2308 time_t time = (time_t)val; 2309 struct tm t; 2310 2311 if (literal || 2312 localtime_r(&time, &t) == NULL || 2313 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2314 &t) == 0) 2315 (void) snprintf(propbuf, proplen, "%llu", val); 2316 } 2317 break; 2318 2319 case ZFS_PROP_MOUNTPOINT: 2320 /* 2321 * Getting the precise mountpoint can be tricky. 2322 * 2323 * - for 'none' or 'legacy', return those values. 2324 * - for inherited mountpoints, we want to take everything 2325 * after our ancestor and append it to the inherited value. 2326 * 2327 * If the pool has an alternate root, we want to prepend that 2328 * root to any values we return. 2329 */ 2330 2331 str = getprop_string(zhp, prop, &source); 2332 2333 if (str[0] == '/') { 2334 char buf[MAXPATHLEN]; 2335 char *root = buf; 2336 const char *relpath; 2337 2338 /* 2339 * If we inherit the mountpoint, even from a dataset 2340 * with a received value, the source will be the path of 2341 * the dataset we inherit from. If source is 2342 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2343 * inherited. 2344 */ 2345 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2346 relpath = ""; 2347 } else { 2348 relpath = zhp->zfs_name + strlen(source); 2349 if (relpath[0] == '/') 2350 relpath++; 2351 } 2352 2353 if ((zpool_get_prop(zhp->zpool_hdl, 2354 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2355 B_FALSE)) || (strcmp(root, "-") == 0)) 2356 root[0] = '\0'; 2357 /* 2358 * Special case an alternate root of '/'. This will 2359 * avoid having multiple leading slashes in the 2360 * mountpoint path. 2361 */ 2362 if (strcmp(root, "/") == 0) 2363 root++; 2364 2365 /* 2366 * If the mountpoint is '/' then skip over this 2367 * if we are obtaining either an alternate root or 2368 * an inherited mountpoint. 2369 */ 2370 if (str[1] == '\0' && (root[0] != '\0' || 2371 relpath[0] != '\0')) 2372 str++; 2373 2374 if (relpath[0] == '\0') 2375 (void) snprintf(propbuf, proplen, "%s%s", 2376 root, str); 2377 else 2378 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2379 root, str, relpath[0] == '@' ? "" : "/", 2380 relpath); 2381 } else { 2382 /* 'legacy' or 'none' */ 2383 (void) strlcpy(propbuf, str, proplen); 2384 } 2385 2386 break; 2387 2388 case ZFS_PROP_ORIGIN: 2389 str = getprop_string(zhp, prop, &source); 2390 if (str == NULL) 2391 return (-1); 2392 (void) strlcpy(propbuf, str, proplen); 2393 break; 2394 2395 case ZFS_PROP_CLONES: 2396 if (get_clones_string(zhp, propbuf, proplen) != 0) 2397 return (-1); 2398 break; 2399 2400 case ZFS_PROP_QUOTA: 2401 case ZFS_PROP_REFQUOTA: 2402 case ZFS_PROP_RESERVATION: 2403 case ZFS_PROP_REFRESERVATION: 2404 2405 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2406 return (-1); 2407 2408 /* 2409 * If quota or reservation is 0, we translate this into 'none' 2410 * (unless literal is set), and indicate that it's the default 2411 * value. Otherwise, we print the number nicely and indicate 2412 * that its set locally. 2413 */ 2414 if (val == 0) { 2415 if (literal) 2416 (void) strlcpy(propbuf, "0", proplen); 2417 else 2418 (void) strlcpy(propbuf, "none", proplen); 2419 } else { 2420 if (literal) 2421 (void) snprintf(propbuf, proplen, "%llu", 2422 (u_longlong_t)val); 2423 else 2424 zfs_nicenum(val, propbuf, proplen); 2425 } 2426 break; 2427 2428 case ZFS_PROP_FILESYSTEM_LIMIT: 2429 case ZFS_PROP_SNAPSHOT_LIMIT: 2430 case ZFS_PROP_FILESYSTEM_COUNT: 2431 case ZFS_PROP_SNAPSHOT_COUNT: 2432 2433 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2434 return (-1); 2435 2436 /* 2437 * If limit is UINT64_MAX, we translate this into 'none' (unless 2438 * literal is set), and indicate that it's the default value. 2439 * Otherwise, we print the number nicely and indicate that it's 2440 * set locally. 2441 */ 2442 if (literal) { 2443 (void) snprintf(propbuf, proplen, "%llu", 2444 (u_longlong_t)val); 2445 } else if (val == UINT64_MAX) { 2446 (void) strlcpy(propbuf, "none", proplen); 2447 } else { 2448 zfs_nicenum(val, propbuf, proplen); 2449 } 2450 break; 2451 2452 case ZFS_PROP_REFRATIO: 2453 case ZFS_PROP_COMPRESSRATIO: 2454 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2455 return (-1); 2456 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2457 (u_longlong_t)(val / 100), 2458 (u_longlong_t)(val % 100)); 2459 break; 2460 2461 case ZFS_PROP_TYPE: 2462 switch (zhp->zfs_type) { 2463 case ZFS_TYPE_FILESYSTEM: 2464 str = "filesystem"; 2465 break; 2466 case ZFS_TYPE_VOLUME: 2467 str = "volume"; 2468 break; 2469 case ZFS_TYPE_SNAPSHOT: 2470 str = "snapshot"; 2471 break; 2472 case ZFS_TYPE_BOOKMARK: 2473 str = "bookmark"; 2474 break; 2475 default: 2476 abort(); 2477 } 2478 (void) snprintf(propbuf, proplen, "%s", str); 2479 break; 2480 2481 case ZFS_PROP_MOUNTED: 2482 /* 2483 * The 'mounted' property is a pseudo-property that described 2484 * whether the filesystem is currently mounted. Even though 2485 * it's a boolean value, the typical values of "on" and "off" 2486 * don't make sense, so we translate to "yes" and "no". 2487 */ 2488 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2489 src, &source, &val) != 0) 2490 return (-1); 2491 if (val) 2492 (void) strlcpy(propbuf, "yes", proplen); 2493 else 2494 (void) strlcpy(propbuf, "no", proplen); 2495 break; 2496 2497 case ZFS_PROP_NAME: 2498 /* 2499 * The 'name' property is a pseudo-property derived from the 2500 * dataset name. It is presented as a real property to simplify 2501 * consumers. 2502 */ 2503 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2504 break; 2505 2506 case ZFS_PROP_MLSLABEL: 2507 { 2508#ifdef illumos 2509 m_label_t *new_sl = NULL; 2510 char *ascii = NULL; /* human readable label */ 2511 2512 (void) strlcpy(propbuf, 2513 getprop_string(zhp, prop, &source), proplen); 2514 2515 if (literal || (strcasecmp(propbuf, 2516 ZFS_MLSLABEL_DEFAULT) == 0)) 2517 break; 2518 2519 /* 2520 * Try to translate the internal hex string to 2521 * human-readable output. If there are any 2522 * problems just use the hex string. 2523 */ 2524 2525 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2526 L_NO_CORRECTION, NULL) == -1) { 2527 m_label_free(new_sl); 2528 break; 2529 } 2530 2531 if (label_to_str(new_sl, &ascii, M_LABEL, 2532 DEF_NAMES) != 0) { 2533 if (ascii) 2534 free(ascii); 2535 m_label_free(new_sl); 2536 break; 2537 } 2538 m_label_free(new_sl); 2539 2540 (void) strlcpy(propbuf, ascii, proplen); 2541 free(ascii); 2542#else /* !illumos */ 2543 propbuf[0] = '\0'; 2544#endif /* illumos */ 2545 } 2546 break; 2547 2548 case ZFS_PROP_GUID: 2549 /* 2550 * GUIDs are stored as numbers, but they are identifiers. 2551 * We don't want them to be pretty printed, because pretty 2552 * printing mangles the ID into a truncated and useless value. 2553 */ 2554 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2555 return (-1); 2556 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2557 break; 2558 2559 default: 2560 switch (zfs_prop_get_type(prop)) { 2561 case PROP_TYPE_NUMBER: 2562 if (get_numeric_property(zhp, prop, src, 2563 &source, &val) != 0) 2564 return (-1); 2565 if (literal) 2566 (void) snprintf(propbuf, proplen, "%llu", 2567 (u_longlong_t)val); 2568 else 2569 zfs_nicenum(val, propbuf, proplen); 2570 break; 2571 2572 case PROP_TYPE_STRING: 2573 str = getprop_string(zhp, prop, &source); 2574 if (str == NULL) 2575 return (-1); 2576 (void) strlcpy(propbuf, str, proplen); 2577 break; 2578 2579 case PROP_TYPE_INDEX: 2580 if (get_numeric_property(zhp, prop, src, 2581 &source, &val) != 0) 2582 return (-1); 2583 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2584 return (-1); 2585 (void) strlcpy(propbuf, strval, proplen); 2586 break; 2587 2588 default: 2589 abort(); 2590 } 2591 } 2592 2593 get_source(zhp, src, source, statbuf, statlen); 2594 2595 return (0); 2596} 2597 2598/* 2599 * Utility function to get the given numeric property. Does no validation that 2600 * the given property is the appropriate type; should only be used with 2601 * hard-coded property types. 2602 */ 2603uint64_t 2604zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2605{ 2606 char *source; 2607 uint64_t val; 2608 2609 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2610 2611 return (val); 2612} 2613 2614int 2615zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2616{ 2617 char buf[64]; 2618 2619 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2620 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2621} 2622 2623/* 2624 * Similar to zfs_prop_get(), but returns the value as an integer. 2625 */ 2626int 2627zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2628 zprop_source_t *src, char *statbuf, size_t statlen) 2629{ 2630 char *source; 2631 2632 /* 2633 * Check to see if this property applies to our object 2634 */ 2635 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2636 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2637 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2638 zfs_prop_to_name(prop))); 2639 } 2640 2641 if (src) 2642 *src = ZPROP_SRC_NONE; 2643 2644 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2645 return (-1); 2646 2647 get_source(zhp, src, source, statbuf, statlen); 2648 2649 return (0); 2650} 2651 2652static int 2653idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2654 char **domainp, idmap_rid_t *ridp) 2655{ 2656#ifdef illumos 2657 idmap_get_handle_t *get_hdl = NULL; 2658 idmap_stat status; 2659 int err = EINVAL; 2660 2661 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2662 goto out; 2663 2664 if (isuser) { 2665 err = idmap_get_sidbyuid(get_hdl, id, 2666 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2667 } else { 2668 err = idmap_get_sidbygid(get_hdl, id, 2669 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2670 } 2671 if (err == IDMAP_SUCCESS && 2672 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2673 status == IDMAP_SUCCESS) 2674 err = 0; 2675 else 2676 err = EINVAL; 2677out: 2678 if (get_hdl) 2679 idmap_get_destroy(get_hdl); 2680 return (err); 2681#else /* !illumos */ 2682 assert(!"invalid code path"); 2683 return (EINVAL); // silence compiler warning 2684#endif /* illumos */ 2685} 2686 2687/* 2688 * convert the propname into parameters needed by kernel 2689 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2690 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2691 */ 2692static int 2693userquota_propname_decode(const char *propname, boolean_t zoned, 2694 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2695{ 2696 zfs_userquota_prop_t type; 2697 char *cp, *end; 2698 char *numericsid = NULL; 2699 boolean_t isuser; 2700 2701 domain[0] = '\0'; 2702 *ridp = 0; 2703 /* Figure out the property type ({user|group}{quota|space}) */ 2704 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2705 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2706 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2707 break; 2708 } 2709 if (type == ZFS_NUM_USERQUOTA_PROPS) 2710 return (EINVAL); 2711 *typep = type; 2712 2713 isuser = (type == ZFS_PROP_USERQUOTA || 2714 type == ZFS_PROP_USERUSED); 2715 2716 cp = strchr(propname, '@') + 1; 2717 2718 if (strchr(cp, '@')) { 2719#ifdef illumos 2720 /* 2721 * It's a SID name (eg "user@domain") that needs to be 2722 * turned into S-1-domainID-RID. 2723 */ 2724 int flag = 0; 2725 idmap_stat stat, map_stat; 2726 uid_t pid; 2727 idmap_rid_t rid; 2728 idmap_get_handle_t *gh = NULL; 2729 2730 stat = idmap_get_create(&gh); 2731 if (stat != IDMAP_SUCCESS) { 2732 idmap_get_destroy(gh); 2733 return (ENOMEM); 2734 } 2735 if (zoned && getzoneid() == GLOBAL_ZONEID) 2736 return (ENOENT); 2737 if (isuser) { 2738 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2739 if (stat < 0) 2740 return (ENOENT); 2741 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2742 &rid, &map_stat); 2743 } else { 2744 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2745 if (stat < 0) 2746 return (ENOENT); 2747 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2748 &rid, &map_stat); 2749 } 2750 if (stat < 0) { 2751 idmap_get_destroy(gh); 2752 return (ENOENT); 2753 } 2754 stat = idmap_get_mappings(gh); 2755 idmap_get_destroy(gh); 2756 2757 if (stat < 0) { 2758 return (ENOENT); 2759 } 2760 if (numericsid == NULL) 2761 return (ENOENT); 2762 cp = numericsid; 2763 *ridp = rid; 2764 /* will be further decoded below */ 2765#else /* !illumos */ 2766 return (ENOENT); 2767#endif /* illumos */ 2768 } 2769 2770 if (strncmp(cp, "S-1-", 4) == 0) { 2771 /* It's a numeric SID (eg "S-1-234-567-89") */ 2772 (void) strlcpy(domain, cp, domainlen); 2773 errno = 0; 2774 if (*ridp == 0) { 2775 cp = strrchr(domain, '-'); 2776 *cp = '\0'; 2777 cp++; 2778 *ridp = strtoull(cp, &end, 10); 2779 } else { 2780 end = ""; 2781 } 2782 if (numericsid) { 2783 free(numericsid); 2784 numericsid = NULL; 2785 } 2786 if (errno != 0 || *end != '\0') 2787 return (EINVAL); 2788 } else if (!isdigit(*cp)) { 2789 /* 2790 * It's a user/group name (eg "user") that needs to be 2791 * turned into a uid/gid 2792 */ 2793 if (zoned && getzoneid() == GLOBAL_ZONEID) 2794 return (ENOENT); 2795 if (isuser) { 2796 struct passwd *pw; 2797 pw = getpwnam(cp); 2798 if (pw == NULL) 2799 return (ENOENT); 2800 *ridp = pw->pw_uid; 2801 } else { 2802 struct group *gr; 2803 gr = getgrnam(cp); 2804 if (gr == NULL) 2805 return (ENOENT); 2806 *ridp = gr->gr_gid; 2807 } 2808 } else { 2809 /* It's a user/group ID (eg "12345"). */ 2810 uid_t id = strtoul(cp, &end, 10); 2811 idmap_rid_t rid; 2812 char *mapdomain; 2813 2814 if (*end != '\0') 2815 return (EINVAL); 2816 if (id > MAXUID) { 2817 /* It's an ephemeral ID. */ 2818 if (idmap_id_to_numeric_domain_rid(id, isuser, 2819 &mapdomain, &rid) != 0) 2820 return (ENOENT); 2821 (void) strlcpy(domain, mapdomain, domainlen); 2822 *ridp = rid; 2823 } else { 2824 *ridp = id; 2825 } 2826 } 2827 2828 ASSERT3P(numericsid, ==, NULL); 2829 return (0); 2830} 2831 2832static int 2833zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2834 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2835{ 2836 int err; 2837 zfs_cmd_t zc = { 0 }; 2838 2839 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2840 2841 err = userquota_propname_decode(propname, 2842 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2843 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2844 zc.zc_objset_type = *typep; 2845 if (err) 2846 return (err); 2847 2848 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2849 if (err) 2850 return (err); 2851 2852 *propvalue = zc.zc_cookie; 2853 return (0); 2854} 2855 2856int 2857zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2858 uint64_t *propvalue) 2859{ 2860 zfs_userquota_prop_t type; 2861 2862 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2863 &type)); 2864} 2865 2866int 2867zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2868 char *propbuf, int proplen, boolean_t literal) 2869{ 2870 int err; 2871 uint64_t propvalue; 2872 zfs_userquota_prop_t type; 2873 2874 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2875 &type); 2876 2877 if (err) 2878 return (err); 2879 2880 if (literal) { 2881 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2882 } else if (propvalue == 0 && 2883 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2884 (void) strlcpy(propbuf, "none", proplen); 2885 } else { 2886 zfs_nicenum(propvalue, propbuf, proplen); 2887 } 2888 return (0); 2889} 2890 2891int 2892zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2893 uint64_t *propvalue) 2894{ 2895 int err; 2896 zfs_cmd_t zc = { 0 }; 2897 const char *snapname; 2898 2899 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2900 2901 snapname = strchr(propname, '@') + 1; 2902 if (strchr(snapname, '@')) { 2903 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2904 } else { 2905 /* snapname is the short name, append it to zhp's fsname */ 2906 char *cp; 2907 2908 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2909 sizeof (zc.zc_value)); 2910 cp = strchr(zc.zc_value, '@'); 2911 if (cp != NULL) 2912 *cp = '\0'; 2913 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2914 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2915 } 2916 2917 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2918 if (err) 2919 return (err); 2920 2921 *propvalue = zc.zc_cookie; 2922 return (0); 2923} 2924 2925int 2926zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2927 char *propbuf, int proplen, boolean_t literal) 2928{ 2929 int err; 2930 uint64_t propvalue; 2931 2932 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2933 2934 if (err) 2935 return (err); 2936 2937 if (literal) { 2938 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2939 } else { 2940 zfs_nicenum(propvalue, propbuf, proplen); 2941 } 2942 return (0); 2943} 2944 2945/* 2946 * Returns the name of the given zfs handle. 2947 */ 2948const char * 2949zfs_get_name(const zfs_handle_t *zhp) 2950{ 2951 return (zhp->zfs_name); 2952} 2953 2954/* 2955 * Returns the type of the given zfs handle. 2956 */ 2957zfs_type_t 2958zfs_get_type(const zfs_handle_t *zhp) 2959{ 2960 return (zhp->zfs_type); 2961} 2962 2963/* 2964 * Is one dataset name a child dataset of another? 2965 * 2966 * Needs to handle these cases: 2967 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2968 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2969 * Descendant? No. No. No. Yes. 2970 */ 2971static boolean_t 2972is_descendant(const char *ds1, const char *ds2) 2973{ 2974 size_t d1len = strlen(ds1); 2975 2976 /* ds2 can't be a descendant if it's smaller */ 2977 if (strlen(ds2) < d1len) 2978 return (B_FALSE); 2979 2980 /* otherwise, compare strings and verify that there's a '/' char */ 2981 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2982} 2983 2984/* 2985 * Given a complete name, return just the portion that refers to the parent. 2986 * Will return -1 if there is no parent (path is just the name of the 2987 * pool). 2988 */ 2989static int 2990parent_name(const char *path, char *buf, size_t buflen) 2991{ 2992 char *slashp; 2993 2994 (void) strlcpy(buf, path, buflen); 2995 2996 if ((slashp = strrchr(buf, '/')) == NULL) 2997 return (-1); 2998 *slashp = '\0'; 2999 3000 return (0); 3001} 3002 3003/* 3004 * If accept_ancestor is false, then check to make sure that the given path has 3005 * a parent, and that it exists. If accept_ancestor is true, then find the 3006 * closest existing ancestor for the given path. In prefixlen return the 3007 * length of already existing prefix of the given path. We also fetch the 3008 * 'zoned' property, which is used to validate property settings when creating 3009 * new datasets. 3010 */ 3011static int 3012check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3013 boolean_t accept_ancestor, int *prefixlen) 3014{ 3015 zfs_cmd_t zc = { 0 }; 3016 char parent[ZFS_MAXNAMELEN]; 3017 char *slash; 3018 zfs_handle_t *zhp; 3019 char errbuf[1024]; 3020 uint64_t is_zoned; 3021 3022 (void) snprintf(errbuf, sizeof (errbuf), 3023 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3024 3025 /* get parent, and check to see if this is just a pool */ 3026 if (parent_name(path, parent, sizeof (parent)) != 0) { 3027 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3028 "missing dataset name")); 3029 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3030 } 3031 3032 /* check to see if the pool exists */ 3033 if ((slash = strchr(parent, '/')) == NULL) 3034 slash = parent + strlen(parent); 3035 (void) strncpy(zc.zc_name, parent, slash - parent); 3036 zc.zc_name[slash - parent] = '\0'; 3037 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3038 errno == ENOENT) { 3039 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3040 "no such pool '%s'"), zc.zc_name); 3041 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3042 } 3043 3044 /* check to see if the parent dataset exists */ 3045 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3046 if (errno == ENOENT && accept_ancestor) { 3047 /* 3048 * Go deeper to find an ancestor, give up on top level. 3049 */ 3050 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3051 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3052 "no such pool '%s'"), zc.zc_name); 3053 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3054 } 3055 } else if (errno == ENOENT) { 3056 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3057 "parent does not exist")); 3058 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3059 } else 3060 return (zfs_standard_error(hdl, errno, errbuf)); 3061 } 3062 3063 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3064 if (zoned != NULL) 3065 *zoned = is_zoned; 3066 3067 /* we are in a non-global zone, but parent is in the global zone */ 3068 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3069 (void) zfs_standard_error(hdl, EPERM, errbuf); 3070 zfs_close(zhp); 3071 return (-1); 3072 } 3073 3074 /* make sure parent is a filesystem */ 3075 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3076 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3077 "parent is not a filesystem")); 3078 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3079 zfs_close(zhp); 3080 return (-1); 3081 } 3082 3083 zfs_close(zhp); 3084 if (prefixlen != NULL) 3085 *prefixlen = strlen(parent); 3086 return (0); 3087} 3088 3089/* 3090 * Finds whether the dataset of the given type(s) exists. 3091 */ 3092boolean_t 3093zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3094{ 3095 zfs_handle_t *zhp; 3096 3097 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3098 return (B_FALSE); 3099 3100 /* 3101 * Try to get stats for the dataset, which will tell us if it exists. 3102 */ 3103 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3104 int ds_type = zhp->zfs_type; 3105 3106 zfs_close(zhp); 3107 if (types & ds_type) 3108 return (B_TRUE); 3109 } 3110 return (B_FALSE); 3111} 3112 3113/* 3114 * Given a path to 'target', create all the ancestors between 3115 * the prefixlen portion of the path, and the target itself. 3116 * Fail if the initial prefixlen-ancestor does not already exist. 3117 */ 3118int 3119create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3120{ 3121 zfs_handle_t *h; 3122 char *cp; 3123 const char *opname; 3124 3125 /* make sure prefix exists */ 3126 cp = target + prefixlen; 3127 if (*cp != '/') { 3128 assert(strchr(cp, '/') == NULL); 3129 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3130 } else { 3131 *cp = '\0'; 3132 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3133 *cp = '/'; 3134 } 3135 if (h == NULL) 3136 return (-1); 3137 zfs_close(h); 3138 3139 /* 3140 * Attempt to create, mount, and share any ancestor filesystems, 3141 * up to the prefixlen-long one. 3142 */ 3143 for (cp = target + prefixlen + 1; 3144 cp = strchr(cp, '/'); *cp = '/', cp++) { 3145 3146 *cp = '\0'; 3147 3148 h = make_dataset_handle(hdl, target); 3149 if (h) { 3150 /* it already exists, nothing to do here */ 3151 zfs_close(h); 3152 continue; 3153 } 3154 3155 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3156 NULL) != 0) { 3157 opname = dgettext(TEXT_DOMAIN, "create"); 3158 goto ancestorerr; 3159 } 3160 3161 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3162 if (h == NULL) { 3163 opname = dgettext(TEXT_DOMAIN, "open"); 3164 goto ancestorerr; 3165 } 3166 3167 if (zfs_mount(h, NULL, 0) != 0) { 3168 opname = dgettext(TEXT_DOMAIN, "mount"); 3169 goto ancestorerr; 3170 } 3171 3172 if (zfs_share(h) != 0) { 3173 opname = dgettext(TEXT_DOMAIN, "share"); 3174 goto ancestorerr; 3175 } 3176 3177 zfs_close(h); 3178 } 3179 3180 return (0); 3181 3182ancestorerr: 3183 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3184 "failed to %s ancestor '%s'"), opname, target); 3185 return (-1); 3186} 3187 3188/* 3189 * Creates non-existing ancestors of the given path. 3190 */ 3191int 3192zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3193{ 3194 int prefix; 3195 char *path_copy; 3196 int rc; 3197 3198 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3199 return (-1); 3200 3201 if ((path_copy = strdup(path)) != NULL) { 3202 rc = create_parents(hdl, path_copy, prefix); 3203 free(path_copy); 3204 } 3205 if (path_copy == NULL || rc != 0) 3206 return (-1); 3207 3208 return (0); 3209} 3210 3211/* 3212 * Create a new filesystem or volume. 3213 */ 3214int 3215zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3216 nvlist_t *props) 3217{ 3218 int ret; 3219 uint64_t size = 0; 3220 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3221 char errbuf[1024]; 3222 uint64_t zoned; 3223 dmu_objset_type_t ost; 3224 3225 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3226 "cannot create '%s'"), path); 3227 3228 /* validate the path, taking care to note the extended error message */ 3229 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3230 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3231 3232 /* validate parents exist */ 3233 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3234 return (-1); 3235 3236 /* 3237 * The failure modes when creating a dataset of a different type over 3238 * one that already exists is a little strange. In particular, if you 3239 * try to create a dataset on top of an existing dataset, the ioctl() 3240 * will return ENOENT, not EEXIST. To prevent this from happening, we 3241 * first try to see if the dataset exists. 3242 */ 3243 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3244 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3245 "dataset already exists")); 3246 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3247 } 3248 3249 if (type == ZFS_TYPE_VOLUME) 3250 ost = DMU_OST_ZVOL; 3251 else 3252 ost = DMU_OST_ZFS; 3253 3254 /* open zpool handle for prop validation */ 3255 char pool_path[MAXNAMELEN]; 3256 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3257 3258 /* truncate pool_path at first slash */ 3259 char *p = strchr(pool_path, '/'); 3260 if (p != NULL) 3261 *p = '\0'; 3262 3263 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path); 3264 3265 if (props && (props = zfs_valid_proplist(hdl, type, props, 3266 zoned, NULL, zpool_handle, errbuf)) == 0) { 3267 zpool_close(zpool_handle); 3268 return (-1); 3269 } 3270 zpool_close(zpool_handle); 3271 3272 if (type == ZFS_TYPE_VOLUME) { 3273 /* 3274 * If we are creating a volume, the size and block size must 3275 * satisfy a few restraints. First, the blocksize must be a 3276 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3277 * volsize must be a multiple of the block size, and cannot be 3278 * zero. 3279 */ 3280 if (props == NULL || nvlist_lookup_uint64(props, 3281 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3282 nvlist_free(props); 3283 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3284 "missing volume size")); 3285 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3286 } 3287 3288 if ((ret = nvlist_lookup_uint64(props, 3289 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3290 &blocksize)) != 0) { 3291 if (ret == ENOENT) { 3292 blocksize = zfs_prop_default_numeric( 3293 ZFS_PROP_VOLBLOCKSIZE); 3294 } else { 3295 nvlist_free(props); 3296 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3297 "missing volume block size")); 3298 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3299 } 3300 } 3301 3302 if (size == 0) { 3303 nvlist_free(props); 3304 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3305 "volume size cannot be zero")); 3306 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3307 } 3308 3309 if (size % blocksize != 0) { 3310 nvlist_free(props); 3311 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3312 "volume size must be a multiple of volume block " 3313 "size")); 3314 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3315 } 3316 } 3317 3318 /* create the dataset */ 3319 ret = lzc_create(path, ost, props); 3320 nvlist_free(props); 3321 3322 /* check for failure */ 3323 if (ret != 0) { 3324 char parent[ZFS_MAXNAMELEN]; 3325 (void) parent_name(path, parent, sizeof (parent)); 3326 3327 switch (errno) { 3328 case ENOENT: 3329 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3330 "no such parent '%s'"), parent); 3331 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3332 3333 case EINVAL: 3334 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3335 "parent '%s' is not a filesystem"), parent); 3336 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3337 3338 case ENOTSUP: 3339 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3340 "pool must be upgraded to set this " 3341 "property or value")); 3342 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3343#ifdef _ILP32 3344 case EOVERFLOW: 3345 /* 3346 * This platform can't address a volume this big. 3347 */ 3348 if (type == ZFS_TYPE_VOLUME) 3349 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3350 errbuf)); 3351#endif 3352 /* FALLTHROUGH */ 3353 default: 3354 return (zfs_standard_error(hdl, errno, errbuf)); 3355 } 3356 } 3357 3358 return (0); 3359} 3360 3361/* 3362 * Destroys the given dataset. The caller must make sure that the filesystem 3363 * isn't mounted, and that there are no active dependents. If the file system 3364 * does not exist this function does nothing. 3365 */ 3366int 3367zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3368{ 3369 zfs_cmd_t zc = { 0 }; 3370 3371 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3372 nvlist_t *nv = fnvlist_alloc(); 3373 fnvlist_add_boolean(nv, zhp->zfs_name); 3374 int error = lzc_destroy_bookmarks(nv, NULL); 3375 fnvlist_free(nv); 3376 if (error != 0) { 3377 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3378 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3379 zhp->zfs_name)); 3380 } 3381 return (0); 3382 } 3383 3384 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3385 3386 if (ZFS_IS_VOLUME(zhp)) { 3387 zc.zc_objset_type = DMU_OST_ZVOL; 3388 } else { 3389 zc.zc_objset_type = DMU_OST_ZFS; 3390 } 3391 3392 zc.zc_defer_destroy = defer; 3393 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3394 errno != ENOENT) { 3395 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3396 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3397 zhp->zfs_name)); 3398 } 3399 3400 remove_mountpoint(zhp); 3401 3402 return (0); 3403} 3404 3405struct destroydata { 3406 nvlist_t *nvl; 3407 const char *snapname; 3408}; 3409 3410static int 3411zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3412{ 3413 struct destroydata *dd = arg; 3414 char name[ZFS_MAXNAMELEN]; 3415 int rv = 0; 3416 3417 (void) snprintf(name, sizeof (name), 3418 "%s@%s", zhp->zfs_name, dd->snapname); 3419 3420 if (lzc_exists(name)) 3421 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3422 3423 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3424 zfs_close(zhp); 3425 return (rv); 3426} 3427 3428/* 3429 * Destroys all snapshots with the given name in zhp & descendants. 3430 */ 3431int 3432zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3433{ 3434 int ret; 3435 struct destroydata dd = { 0 }; 3436 3437 dd.snapname = snapname; 3438 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3439 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3440 3441 if (nvlist_empty(dd.nvl)) { 3442 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3443 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3444 zhp->zfs_name, snapname); 3445 } else { 3446 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3447 } 3448 nvlist_free(dd.nvl); 3449 return (ret); 3450} 3451 3452/* 3453 * Destroys all the snapshots named in the nvlist. 3454 */ 3455int 3456zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3457{ 3458 int ret; 3459 nvlist_t *errlist; 3460 3461 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3462 3463 if (ret == 0) 3464 return (0); 3465 3466 if (nvlist_empty(errlist)) { 3467 char errbuf[1024]; 3468 (void) snprintf(errbuf, sizeof (errbuf), 3469 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3470 3471 ret = zfs_standard_error(hdl, ret, errbuf); 3472 } 3473 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3474 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3475 char errbuf[1024]; 3476 (void) snprintf(errbuf, sizeof (errbuf), 3477 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3478 nvpair_name(pair)); 3479 3480 switch (fnvpair_value_int32(pair)) { 3481 case EEXIST: 3482 zfs_error_aux(hdl, 3483 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3484 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3485 break; 3486 default: 3487 ret = zfs_standard_error(hdl, errno, errbuf); 3488 break; 3489 } 3490 } 3491 3492 return (ret); 3493} 3494 3495/* 3496 * Clones the given dataset. The target must be of the same type as the source. 3497 */ 3498int 3499zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3500{ 3501 char parent[ZFS_MAXNAMELEN]; 3502 int ret; 3503 char errbuf[1024]; 3504 libzfs_handle_t *hdl = zhp->zfs_hdl; 3505 uint64_t zoned; 3506 3507 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3508 3509 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3510 "cannot create '%s'"), target); 3511 3512 /* validate the target/clone name */ 3513 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3514 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3515 3516 /* validate parents exist */ 3517 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3518 return (-1); 3519 3520 (void) parent_name(target, parent, sizeof (parent)); 3521 3522 /* do the clone */ 3523 3524 if (props) { 3525 zfs_type_t type; 3526 if (ZFS_IS_VOLUME(zhp)) { 3527 type = ZFS_TYPE_VOLUME; 3528 } else { 3529 type = ZFS_TYPE_FILESYSTEM; 3530 } 3531 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3532 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3533 return (-1); 3534 } 3535 3536 ret = lzc_clone(target, zhp->zfs_name, props); 3537 nvlist_free(props); 3538 3539 if (ret != 0) { 3540 switch (errno) { 3541 3542 case ENOENT: 3543 /* 3544 * The parent doesn't exist. We should have caught this 3545 * above, but there may a race condition that has since 3546 * destroyed the parent. 3547 * 3548 * At this point, we don't know whether it's the source 3549 * that doesn't exist anymore, or whether the target 3550 * dataset doesn't exist. 3551 */ 3552 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3553 "no such parent '%s'"), parent); 3554 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3555 3556 case EXDEV: 3557 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3558 "source and target pools differ")); 3559 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3560 errbuf)); 3561 3562 default: 3563 return (zfs_standard_error(zhp->zfs_hdl, errno, 3564 errbuf)); 3565 } 3566 } 3567 3568 return (ret); 3569} 3570 3571/* 3572 * Promotes the given clone fs to be the clone parent. 3573 */ 3574int 3575zfs_promote(zfs_handle_t *zhp) 3576{ 3577 libzfs_handle_t *hdl = zhp->zfs_hdl; 3578 zfs_cmd_t zc = { 0 }; 3579 char parent[MAXPATHLEN]; 3580 int ret; 3581 char errbuf[1024]; 3582 3583 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3584 "cannot promote '%s'"), zhp->zfs_name); 3585 3586 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3587 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3588 "snapshots can not be promoted")); 3589 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3590 } 3591 3592 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3593 if (parent[0] == '\0') { 3594 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3595 "not a cloned filesystem")); 3596 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3597 } 3598 3599 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3600 sizeof (zc.zc_value)); 3601 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3602 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3603 3604 if (ret != 0) { 3605 int save_errno = errno; 3606 3607 switch (save_errno) { 3608 case EEXIST: 3609 /* There is a conflicting snapshot name. */ 3610 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3611 "conflicting snapshot '%s' from parent '%s'"), 3612 zc.zc_string, parent); 3613 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3614 3615 default: 3616 return (zfs_standard_error(hdl, save_errno, errbuf)); 3617 } 3618 } 3619 return (ret); 3620} 3621 3622typedef struct snapdata { 3623 nvlist_t *sd_nvl; 3624 const char *sd_snapname; 3625} snapdata_t; 3626 3627static int 3628zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3629{ 3630 snapdata_t *sd = arg; 3631 char name[ZFS_MAXNAMELEN]; 3632 int rv = 0; 3633 3634 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3635 (void) snprintf(name, sizeof (name), 3636 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3637 3638 fnvlist_add_boolean(sd->sd_nvl, name); 3639 3640 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3641 } 3642 zfs_close(zhp); 3643 3644 return (rv); 3645} 3646 3647/* 3648 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3649 * created. 3650 */ 3651int 3652zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3653{ 3654 int ret; 3655 char errbuf[1024]; 3656 nvpair_t *elem; 3657 nvlist_t *errors; 3658 3659 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3660 "cannot create snapshots ")); 3661 3662 elem = NULL; 3663 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3664 const char *snapname = nvpair_name(elem); 3665 3666 /* validate the target name */ 3667 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3668 B_TRUE)) { 3669 (void) snprintf(errbuf, sizeof (errbuf), 3670 dgettext(TEXT_DOMAIN, 3671 "cannot create snapshot '%s'"), snapname); 3672 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3673 } 3674 } 3675 3676 /* 3677 * get pool handle for prop validation. assumes all snaps are in the 3678 * same pool, as does lzc_snapshot (below). 3679 */ 3680 char pool[MAXNAMELEN]; 3681 elem = nvlist_next_nvpair(snaps, NULL); 3682 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3683 pool[strcspn(pool, "/@")] = '\0'; 3684 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3685 3686 if (props != NULL && 3687 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3688 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3689 zpool_close(zpool_hdl); 3690 return (-1); 3691 } 3692 zpool_close(zpool_hdl); 3693 3694 ret = lzc_snapshot(snaps, props, &errors); 3695 3696 if (ret != 0) { 3697 boolean_t printed = B_FALSE; 3698 for (elem = nvlist_next_nvpair(errors, NULL); 3699 elem != NULL; 3700 elem = nvlist_next_nvpair(errors, elem)) { 3701 (void) snprintf(errbuf, sizeof (errbuf), 3702 dgettext(TEXT_DOMAIN, 3703 "cannot create snapshot '%s'"), nvpair_name(elem)); 3704 (void) zfs_standard_error(hdl, 3705 fnvpair_value_int32(elem), errbuf); 3706 printed = B_TRUE; 3707 } 3708 if (!printed) { 3709 switch (ret) { 3710 case EXDEV: 3711 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3712 "multiple snapshots of same " 3713 "fs not allowed")); 3714 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3715 3716 break; 3717 default: 3718 (void) zfs_standard_error(hdl, ret, errbuf); 3719 } 3720 } 3721 } 3722 3723 nvlist_free(props); 3724 nvlist_free(errors); 3725 return (ret); 3726} 3727 3728int 3729zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3730 nvlist_t *props) 3731{ 3732 int ret; 3733 snapdata_t sd = { 0 }; 3734 char fsname[ZFS_MAXNAMELEN]; 3735 char *cp; 3736 zfs_handle_t *zhp; 3737 char errbuf[1024]; 3738 3739 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3740 "cannot snapshot %s"), path); 3741 3742 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3743 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3744 3745 (void) strlcpy(fsname, path, sizeof (fsname)); 3746 cp = strchr(fsname, '@'); 3747 *cp = '\0'; 3748 sd.sd_snapname = cp + 1; 3749 3750 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3751 ZFS_TYPE_VOLUME)) == NULL) { 3752 return (-1); 3753 } 3754 3755 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3756 if (recursive) { 3757 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3758 } else { 3759 fnvlist_add_boolean(sd.sd_nvl, path); 3760 } 3761 3762 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3763 nvlist_free(sd.sd_nvl); 3764 zfs_close(zhp); 3765 return (ret); 3766} 3767 3768/* 3769 * Destroy any more recent snapshots. We invoke this callback on any dependents 3770 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3771 * is a dependent and we should just destroy it without checking the transaction 3772 * group. 3773 */ 3774typedef struct rollback_data { 3775 const char *cb_target; /* the snapshot */ 3776 uint64_t cb_create; /* creation time reference */ 3777 boolean_t cb_error; 3778 boolean_t cb_force; 3779} rollback_data_t; 3780 3781static int 3782rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3783{ 3784 rollback_data_t *cbp = data; 3785 prop_changelist_t *clp; 3786 3787 /* We must destroy this clone; first unmount it */ 3788 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3789 cbp->cb_force ? MS_FORCE: 0); 3790 if (clp == NULL || changelist_prefix(clp) != 0) { 3791 cbp->cb_error = B_TRUE; 3792 zfs_close(zhp); 3793 return (0); 3794 } 3795 if (zfs_destroy(zhp, B_FALSE) != 0) 3796 cbp->cb_error = B_TRUE; 3797 else 3798 changelist_remove(clp, zhp->zfs_name); 3799 (void) changelist_postfix(clp); 3800 changelist_free(clp); 3801 3802 zfs_close(zhp); 3803 return (0); 3804} 3805 3806static int 3807rollback_destroy(zfs_handle_t *zhp, void *data) 3808{ 3809 rollback_data_t *cbp = data; 3810 3811 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3812 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3813 rollback_destroy_dependent, cbp); 3814 3815 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3816 } 3817 3818 zfs_close(zhp); 3819 return (0); 3820} 3821 3822/* 3823 * Given a dataset, rollback to a specific snapshot, discarding any 3824 * data changes since then and making it the active dataset. 3825 * 3826 * Any snapshots and bookmarks more recent than the target are 3827 * destroyed, along with their dependents (i.e. clones). 3828 */ 3829int 3830zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3831{ 3832 rollback_data_t cb = { 0 }; 3833 int err; 3834 boolean_t restore_resv = 0; 3835 uint64_t old_volsize, new_volsize; 3836 zfs_prop_t resv_prop; 3837 3838 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3839 zhp->zfs_type == ZFS_TYPE_VOLUME); 3840 3841 /* 3842 * Destroy all recent snapshots and their dependents. 3843 */ 3844 cb.cb_force = force; 3845 cb.cb_target = snap->zfs_name; 3846 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3847 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3848 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3849 3850 if (cb.cb_error) 3851 return (-1); 3852 3853 /* 3854 * Now that we have verified that the snapshot is the latest, 3855 * rollback to the given snapshot. 3856 */ 3857 3858 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3859 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3860 return (-1); 3861 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3862 restore_resv = 3863 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3864 } 3865 3866 /* 3867 * We rely on zfs_iter_children() to verify that there are no 3868 * newer snapshots for the given dataset. Therefore, we can 3869 * simply pass the name on to the ioctl() call. There is still 3870 * an unlikely race condition where the user has taken a 3871 * snapshot since we verified that this was the most recent. 3872 */ 3873 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3874 if (err != 0) { 3875 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3876 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3877 zhp->zfs_name); 3878 return (err); 3879 } 3880 3881 /* 3882 * For volumes, if the pre-rollback volsize matched the pre- 3883 * rollback reservation and the volsize has changed then set 3884 * the reservation property to the post-rollback volsize. 3885 * Make a new handle since the rollback closed the dataset. 3886 */ 3887 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3888 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3889 if (restore_resv) { 3890 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3891 if (old_volsize != new_volsize) 3892 err = zfs_prop_set_int(zhp, resv_prop, 3893 new_volsize); 3894 } 3895 zfs_close(zhp); 3896 } 3897 return (err); 3898} 3899 3900/* 3901 * Renames the given dataset. 3902 */ 3903int 3904zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3905 renameflags_t flags) 3906{ 3907 int ret; 3908 zfs_cmd_t zc = { 0 }; 3909 char *delim; 3910 prop_changelist_t *cl = NULL; 3911 zfs_handle_t *zhrp = NULL; 3912 char *parentname = NULL; 3913 char parent[ZFS_MAXNAMELEN]; 3914 char property[ZFS_MAXPROPLEN]; 3915 libzfs_handle_t *hdl = zhp->zfs_hdl; 3916 char errbuf[1024]; 3917 3918 /* if we have the same exact name, just return success */ 3919 if (strcmp(zhp->zfs_name, target) == 0) 3920 return (0); 3921 3922 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3923 "cannot rename to '%s'"), target); 3924 3925 if (source != NULL) { 3926 /* 3927 * This is recursive snapshots rename, put snapshot name 3928 * (that might not exist) into zfs_name. 3929 */ 3930 assert(flags.recurse); 3931 3932 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3933 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3934 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3935 } 3936 3937 /* 3938 * Make sure the target name is valid 3939 */ 3940 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3941 if ((strchr(target, '@') == NULL) || 3942 *target == '@') { 3943 /* 3944 * Snapshot target name is abbreviated, 3945 * reconstruct full dataset name 3946 */ 3947 (void) strlcpy(parent, zhp->zfs_name, 3948 sizeof (parent)); 3949 delim = strchr(parent, '@'); 3950 if (strchr(target, '@') == NULL) 3951 *(++delim) = '\0'; 3952 else 3953 *delim = '\0'; 3954 (void) strlcat(parent, target, sizeof (parent)); 3955 target = parent; 3956 } else { 3957 /* 3958 * Make sure we're renaming within the same dataset. 3959 */ 3960 delim = strchr(target, '@'); 3961 if (strncmp(zhp->zfs_name, target, delim - target) 3962 != 0 || zhp->zfs_name[delim - target] != '@') { 3963 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3964 "snapshots must be part of same " 3965 "dataset")); 3966 return (zfs_error(hdl, EZFS_CROSSTARGET, 3967 errbuf)); 3968 } 3969 } 3970 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3971 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3972 } else { 3973 if (flags.recurse) { 3974 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3975 "recursive rename must be a snapshot")); 3976 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3977 } 3978 3979 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3980 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3981 3982 /* validate parents */ 3983 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3984 return (-1); 3985 3986 /* make sure we're in the same pool */ 3987 verify((delim = strchr(target, '/')) != NULL); 3988 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3989 zhp->zfs_name[delim - target] != '/') { 3990 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3991 "datasets must be within same pool")); 3992 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3993 } 3994 3995 /* new name cannot be a child of the current dataset name */ 3996 if (is_descendant(zhp->zfs_name, target)) { 3997 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3998 "New dataset name cannot be a descendant of " 3999 "current dataset name")); 4000 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4001 } 4002 } 4003 4004 (void) snprintf(errbuf, sizeof (errbuf), 4005 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4006 4007 if (getzoneid() == GLOBAL_ZONEID && 4008 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4009 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4010 "dataset is used in a non-global zone")); 4011 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4012 } 4013 4014 /* 4015 * Avoid unmounting file systems with mountpoint property set to 4016 * 'legacy' or 'none' even if -u option is not given. 4017 */ 4018 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4019 !flags.recurse && !flags.nounmount && 4020 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4021 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4022 (strcmp(property, "legacy") == 0 || 4023 strcmp(property, "none") == 0)) { 4024 flags.nounmount = B_TRUE; 4025 } 4026 if (flags.recurse) { 4027 4028 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4029 if (parentname == NULL) { 4030 ret = -1; 4031 goto error; 4032 } 4033 delim = strchr(parentname, '@'); 4034 *delim = '\0'; 4035 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4036 if (zhrp == NULL) { 4037 ret = -1; 4038 goto error; 4039 } 4040 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4041 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4042 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4043 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4044 return (-1); 4045 } 4046 4047 if (changelist_haszonedchild(cl)) { 4048 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4049 "child dataset with inherited mountpoint is used " 4050 "in a non-global zone")); 4051 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4052 goto error; 4053 } 4054 4055 if ((ret = changelist_prefix(cl)) != 0) 4056 goto error; 4057 } 4058 4059 if (ZFS_IS_VOLUME(zhp)) 4060 zc.zc_objset_type = DMU_OST_ZVOL; 4061 else 4062 zc.zc_objset_type = DMU_OST_ZFS; 4063 4064 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4065 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4066 4067 zc.zc_cookie = flags.recurse ? 1 : 0; 4068 if (flags.nounmount) 4069 zc.zc_cookie |= 2; 4070 4071 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4072 /* 4073 * if it was recursive, the one that actually failed will 4074 * be in zc.zc_name 4075 */ 4076 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4077 "cannot rename '%s'"), zc.zc_name); 4078 4079 if (flags.recurse && errno == EEXIST) { 4080 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4081 "a child dataset already has a snapshot " 4082 "with the new name")); 4083 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4084 } else { 4085 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4086 } 4087 4088 /* 4089 * On failure, we still want to remount any filesystems that 4090 * were previously mounted, so we don't alter the system state. 4091 */ 4092 if (cl != NULL) 4093 (void) changelist_postfix(cl); 4094 } else { 4095 if (cl != NULL) { 4096 changelist_rename(cl, zfs_get_name(zhp), target); 4097 ret = changelist_postfix(cl); 4098 } 4099 } 4100 4101error: 4102 if (parentname != NULL) { 4103 free(parentname); 4104 } 4105 if (zhrp != NULL) { 4106 zfs_close(zhrp); 4107 } 4108 if (cl != NULL) { 4109 changelist_free(cl); 4110 } 4111 return (ret); 4112} 4113 4114nvlist_t * 4115zfs_get_user_props(zfs_handle_t *zhp) 4116{ 4117 return (zhp->zfs_user_props); 4118} 4119 4120nvlist_t * 4121zfs_get_recvd_props(zfs_handle_t *zhp) 4122{ 4123 if (zhp->zfs_recvd_props == NULL) 4124 if (get_recvd_props_ioctl(zhp) != 0) 4125 return (NULL); 4126 return (zhp->zfs_recvd_props); 4127} 4128 4129/* 4130 * This function is used by 'zfs list' to determine the exact set of columns to 4131 * display, and their maximum widths. This does two main things: 4132 * 4133 * - If this is a list of all properties, then expand the list to include 4134 * all native properties, and set a flag so that for each dataset we look 4135 * for new unique user properties and add them to the list. 4136 * 4137 * - For non fixed-width properties, keep track of the maximum width seen 4138 * so that we can size the column appropriately. If the user has 4139 * requested received property values, we also need to compute the width 4140 * of the RECEIVED column. 4141 */ 4142int 4143zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4144 boolean_t literal) 4145{ 4146 libzfs_handle_t *hdl = zhp->zfs_hdl; 4147 zprop_list_t *entry; 4148 zprop_list_t **last, **start; 4149 nvlist_t *userprops, *propval; 4150 nvpair_t *elem; 4151 char *strval; 4152 char buf[ZFS_MAXPROPLEN]; 4153 4154 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4155 return (-1); 4156 4157 userprops = zfs_get_user_props(zhp); 4158 4159 entry = *plp; 4160 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4161 /* 4162 * Go through and add any user properties as necessary. We 4163 * start by incrementing our list pointer to the first 4164 * non-native property. 4165 */ 4166 start = plp; 4167 while (*start != NULL) { 4168 if ((*start)->pl_prop == ZPROP_INVAL) 4169 break; 4170 start = &(*start)->pl_next; 4171 } 4172 4173 elem = NULL; 4174 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4175 /* 4176 * See if we've already found this property in our list. 4177 */ 4178 for (last = start; *last != NULL; 4179 last = &(*last)->pl_next) { 4180 if (strcmp((*last)->pl_user_prop, 4181 nvpair_name(elem)) == 0) 4182 break; 4183 } 4184 4185 if (*last == NULL) { 4186 if ((entry = zfs_alloc(hdl, 4187 sizeof (zprop_list_t))) == NULL || 4188 ((entry->pl_user_prop = zfs_strdup(hdl, 4189 nvpair_name(elem)))) == NULL) { 4190 free(entry); 4191 return (-1); 4192 } 4193 4194 entry->pl_prop = ZPROP_INVAL; 4195 entry->pl_width = strlen(nvpair_name(elem)); 4196 entry->pl_all = B_TRUE; 4197 *last = entry; 4198 } 4199 } 4200 } 4201 4202 /* 4203 * Now go through and check the width of any non-fixed columns 4204 */ 4205 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4206 if (entry->pl_fixed && !literal) 4207 continue; 4208 4209 if (entry->pl_prop != ZPROP_INVAL) { 4210 if (zfs_prop_get(zhp, entry->pl_prop, 4211 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4212 if (strlen(buf) > entry->pl_width) 4213 entry->pl_width = strlen(buf); 4214 } 4215 if (received && zfs_prop_get_recvd(zhp, 4216 zfs_prop_to_name(entry->pl_prop), 4217 buf, sizeof (buf), literal) == 0) 4218 if (strlen(buf) > entry->pl_recvd_width) 4219 entry->pl_recvd_width = strlen(buf); 4220 } else { 4221 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4222 &propval) == 0) { 4223 verify(nvlist_lookup_string(propval, 4224 ZPROP_VALUE, &strval) == 0); 4225 if (strlen(strval) > entry->pl_width) 4226 entry->pl_width = strlen(strval); 4227 } 4228 if (received && zfs_prop_get_recvd(zhp, 4229 entry->pl_user_prop, 4230 buf, sizeof (buf), literal) == 0) 4231 if (strlen(buf) > entry->pl_recvd_width) 4232 entry->pl_recvd_width = strlen(buf); 4233 } 4234 } 4235 4236 return (0); 4237} 4238 4239int 4240zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4241 char *resource, void *export, void *sharetab, 4242 int sharemax, zfs_share_op_t operation) 4243{ 4244 zfs_cmd_t zc = { 0 }; 4245 int error; 4246 4247 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4248 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4249 if (resource) 4250 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4251 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4252 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4253 zc.zc_share.z_sharetype = operation; 4254 zc.zc_share.z_sharemax = sharemax; 4255 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4256 return (error); 4257} 4258 4259void 4260zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4261{ 4262 nvpair_t *curr; 4263 4264 /* 4265 * Keep a reference to the props-table against which we prune the 4266 * properties. 4267 */ 4268 zhp->zfs_props_table = props; 4269 4270 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4271 4272 while (curr) { 4273 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4274 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4275 4276 /* 4277 * User properties will result in ZPROP_INVAL, and since we 4278 * only know how to prune standard ZFS properties, we always 4279 * leave these in the list. This can also happen if we 4280 * encounter an unknown DSL property (when running older 4281 * software, for example). 4282 */ 4283 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4284 (void) nvlist_remove(zhp->zfs_props, 4285 nvpair_name(curr), nvpair_type(curr)); 4286 curr = next; 4287 } 4288} 4289 4290#ifdef illumos 4291static int 4292zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4293 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4294{ 4295 zfs_cmd_t zc = { 0 }; 4296 nvlist_t *nvlist = NULL; 4297 int error; 4298 4299 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4300 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4301 zc.zc_cookie = (uint64_t)cmd; 4302 4303 if (cmd == ZFS_SMB_ACL_RENAME) { 4304 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4305 (void) no_memory(hdl); 4306 return (0); 4307 } 4308 } 4309 4310 switch (cmd) { 4311 case ZFS_SMB_ACL_ADD: 4312 case ZFS_SMB_ACL_REMOVE: 4313 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4314 break; 4315 case ZFS_SMB_ACL_RENAME: 4316 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4317 resource1) != 0) { 4318 (void) no_memory(hdl); 4319 return (-1); 4320 } 4321 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4322 resource2) != 0) { 4323 (void) no_memory(hdl); 4324 return (-1); 4325 } 4326 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4327 nvlist_free(nvlist); 4328 return (-1); 4329 } 4330 break; 4331 case ZFS_SMB_ACL_PURGE: 4332 break; 4333 default: 4334 return (-1); 4335 } 4336 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4337 if (nvlist) 4338 nvlist_free(nvlist); 4339 return (error); 4340} 4341 4342int 4343zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4344 char *path, char *resource) 4345{ 4346 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4347 resource, NULL)); 4348} 4349 4350int 4351zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4352 char *path, char *resource) 4353{ 4354 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4355 resource, NULL)); 4356} 4357 4358int 4359zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4360{ 4361 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4362 NULL, NULL)); 4363} 4364 4365int 4366zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4367 char *oldname, char *newname) 4368{ 4369 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4370 oldname, newname)); 4371} 4372#endif /* illumos */ 4373 4374int 4375zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4376 zfs_userspace_cb_t func, void *arg) 4377{ 4378 zfs_cmd_t zc = { 0 }; 4379 zfs_useracct_t buf[100]; 4380 libzfs_handle_t *hdl = zhp->zfs_hdl; 4381 int ret; 4382 4383 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4384 4385 zc.zc_objset_type = type; 4386 zc.zc_nvlist_dst = (uintptr_t)buf; 4387 4388 for (;;) { 4389 zfs_useracct_t *zua = buf; 4390 4391 zc.zc_nvlist_dst_size = sizeof (buf); 4392 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4393 char errbuf[1024]; 4394 4395 (void) snprintf(errbuf, sizeof (errbuf), 4396 dgettext(TEXT_DOMAIN, 4397 "cannot get used/quota for %s"), zc.zc_name); 4398 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4399 } 4400 if (zc.zc_nvlist_dst_size == 0) 4401 break; 4402 4403 while (zc.zc_nvlist_dst_size > 0) { 4404 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4405 zua->zu_space)) != 0) 4406 return (ret); 4407 zua++; 4408 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4409 } 4410 } 4411 4412 return (0); 4413} 4414 4415struct holdarg { 4416 nvlist_t *nvl; 4417 const char *snapname; 4418 const char *tag; 4419 boolean_t recursive; 4420 int error; 4421}; 4422 4423static int 4424zfs_hold_one(zfs_handle_t *zhp, void *arg) 4425{ 4426 struct holdarg *ha = arg; 4427 char name[ZFS_MAXNAMELEN]; 4428 int rv = 0; 4429 4430 (void) snprintf(name, sizeof (name), 4431 "%s@%s", zhp->zfs_name, ha->snapname); 4432 4433 if (lzc_exists(name)) 4434 fnvlist_add_string(ha->nvl, name, ha->tag); 4435 4436 if (ha->recursive) 4437 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4438 zfs_close(zhp); 4439 return (rv); 4440} 4441 4442int 4443zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4444 boolean_t recursive, int cleanup_fd) 4445{ 4446 int ret; 4447 struct holdarg ha; 4448 4449 ha.nvl = fnvlist_alloc(); 4450 ha.snapname = snapname; 4451 ha.tag = tag; 4452 ha.recursive = recursive; 4453 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4454 4455 if (nvlist_empty(ha.nvl)) { 4456 char errbuf[1024]; 4457 4458 fnvlist_free(ha.nvl); 4459 ret = ENOENT; 4460 (void) snprintf(errbuf, sizeof (errbuf), 4461 dgettext(TEXT_DOMAIN, 4462 "cannot hold snapshot '%s@%s'"), 4463 zhp->zfs_name, snapname); 4464 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4465 return (ret); 4466 } 4467 4468 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4469 fnvlist_free(ha.nvl); 4470 4471 return (ret); 4472} 4473 4474int 4475zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4476{ 4477 int ret; 4478 nvlist_t *errors; 4479 libzfs_handle_t *hdl = zhp->zfs_hdl; 4480 char errbuf[1024]; 4481 nvpair_t *elem; 4482 4483 errors = NULL; 4484 ret = lzc_hold(holds, cleanup_fd, &errors); 4485 4486 if (ret == 0) { 4487 /* There may be errors even in the success case. */ 4488 fnvlist_free(errors); 4489 return (0); 4490 } 4491 4492 if (nvlist_empty(errors)) { 4493 /* no hold-specific errors */ 4494 (void) snprintf(errbuf, sizeof (errbuf), 4495 dgettext(TEXT_DOMAIN, "cannot hold")); 4496 switch (ret) { 4497 case ENOTSUP: 4498 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4499 "pool must be upgraded")); 4500 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4501 break; 4502 case EINVAL: 4503 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4504 break; 4505 default: 4506 (void) zfs_standard_error(hdl, ret, errbuf); 4507 } 4508 } 4509 4510 for (elem = nvlist_next_nvpair(errors, NULL); 4511 elem != NULL; 4512 elem = nvlist_next_nvpair(errors, elem)) { 4513 (void) snprintf(errbuf, sizeof (errbuf), 4514 dgettext(TEXT_DOMAIN, 4515 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4516 switch (fnvpair_value_int32(elem)) { 4517 case E2BIG: 4518 /* 4519 * Temporary tags wind up having the ds object id 4520 * prepended. So even if we passed the length check 4521 * above, it's still possible for the tag to wind 4522 * up being slightly too long. 4523 */ 4524 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4525 break; 4526 case EINVAL: 4527 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4528 break; 4529 case EEXIST: 4530 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4531 break; 4532 default: 4533 (void) zfs_standard_error(hdl, 4534 fnvpair_value_int32(elem), errbuf); 4535 } 4536 } 4537 4538 fnvlist_free(errors); 4539 return (ret); 4540} 4541 4542static int 4543zfs_release_one(zfs_handle_t *zhp, void *arg) 4544{ 4545 struct holdarg *ha = arg; 4546 char name[ZFS_MAXNAMELEN]; 4547 int rv = 0; 4548 nvlist_t *existing_holds; 4549 4550 (void) snprintf(name, sizeof (name), 4551 "%s@%s", zhp->zfs_name, ha->snapname); 4552 4553 if (lzc_get_holds(name, &existing_holds) != 0) { 4554 ha->error = ENOENT; 4555 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4556 ha->error = ESRCH; 4557 } else { 4558 nvlist_t *torelease = fnvlist_alloc(); 4559 fnvlist_add_boolean(torelease, ha->tag); 4560 fnvlist_add_nvlist(ha->nvl, name, torelease); 4561 fnvlist_free(torelease); 4562 } 4563 4564 if (ha->recursive) 4565 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4566 zfs_close(zhp); 4567 return (rv); 4568} 4569 4570int 4571zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4572 boolean_t recursive) 4573{ 4574 int ret; 4575 struct holdarg ha; 4576 nvlist_t *errors = NULL; 4577 nvpair_t *elem; 4578 libzfs_handle_t *hdl = zhp->zfs_hdl; 4579 char errbuf[1024]; 4580 4581 ha.nvl = fnvlist_alloc(); 4582 ha.snapname = snapname; 4583 ha.tag = tag; 4584 ha.recursive = recursive; 4585 ha.error = 0; 4586 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4587 4588 if (nvlist_empty(ha.nvl)) { 4589 fnvlist_free(ha.nvl); 4590 ret = ha.error; 4591 (void) snprintf(errbuf, sizeof (errbuf), 4592 dgettext(TEXT_DOMAIN, 4593 "cannot release hold from snapshot '%s@%s'"), 4594 zhp->zfs_name, snapname); 4595 if (ret == ESRCH) { 4596 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4597 } else { 4598 (void) zfs_standard_error(hdl, ret, errbuf); 4599 } 4600 return (ret); 4601 } 4602 4603 ret = lzc_release(ha.nvl, &errors); 4604 fnvlist_free(ha.nvl); 4605 4606 if (ret == 0) { 4607 /* There may be errors even in the success case. */ 4608 fnvlist_free(errors); 4609 return (0); 4610 } 4611 4612 if (nvlist_empty(errors)) { 4613 /* no hold-specific errors */ 4614 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4615 "cannot release")); 4616 switch (errno) { 4617 case ENOTSUP: 4618 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4619 "pool must be upgraded")); 4620 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4621 break; 4622 default: 4623 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4624 } 4625 } 4626 4627 for (elem = nvlist_next_nvpair(errors, NULL); 4628 elem != NULL; 4629 elem = nvlist_next_nvpair(errors, elem)) { 4630 (void) snprintf(errbuf, sizeof (errbuf), 4631 dgettext(TEXT_DOMAIN, 4632 "cannot release hold from snapshot '%s'"), 4633 nvpair_name(elem)); 4634 switch (fnvpair_value_int32(elem)) { 4635 case ESRCH: 4636 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4637 break; 4638 case EINVAL: 4639 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4640 break; 4641 default: 4642 (void) zfs_standard_error_fmt(hdl, 4643 fnvpair_value_int32(elem), errbuf); 4644 } 4645 } 4646 4647 fnvlist_free(errors); 4648 return (ret); 4649} 4650 4651int 4652zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4653{ 4654 zfs_cmd_t zc = { 0 }; 4655 libzfs_handle_t *hdl = zhp->zfs_hdl; 4656 int nvsz = 2048; 4657 void *nvbuf; 4658 int err = 0; 4659 char errbuf[1024]; 4660 4661 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4662 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4663 4664tryagain: 4665 4666 nvbuf = malloc(nvsz); 4667 if (nvbuf == NULL) { 4668 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4669 goto out; 4670 } 4671 4672 zc.zc_nvlist_dst_size = nvsz; 4673 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4674 4675 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN); 4676 4677 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4678 (void) snprintf(errbuf, sizeof (errbuf), 4679 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4680 zc.zc_name); 4681 switch (errno) { 4682 case ENOMEM: 4683 free(nvbuf); 4684 nvsz = zc.zc_nvlist_dst_size; 4685 goto tryagain; 4686 4687 case ENOTSUP: 4688 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4689 "pool must be upgraded")); 4690 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4691 break; 4692 case EINVAL: 4693 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4694 break; 4695 case ENOENT: 4696 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4697 break; 4698 default: 4699 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4700 break; 4701 } 4702 } else { 4703 /* success */ 4704 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4705 if (rc) { 4706 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4707 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4708 zc.zc_name); 4709 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4710 } 4711 } 4712 4713 free(nvbuf); 4714out: 4715 return (err); 4716} 4717 4718int 4719zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4720{ 4721 zfs_cmd_t zc = { 0 }; 4722 libzfs_handle_t *hdl = zhp->zfs_hdl; 4723 char *nvbuf; 4724 char errbuf[1024]; 4725 size_t nvsz; 4726 int err; 4727 4728 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4729 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4730 4731 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4732 assert(err == 0); 4733 4734 nvbuf = malloc(nvsz); 4735 4736 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4737 assert(err == 0); 4738 4739 zc.zc_nvlist_src_size = nvsz; 4740 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4741 zc.zc_perm_action = un; 4742 4743 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4744 4745 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4746 (void) snprintf(errbuf, sizeof (errbuf), 4747 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4748 zc.zc_name); 4749 switch (errno) { 4750 case ENOTSUP: 4751 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4752 "pool must be upgraded")); 4753 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4754 break; 4755 case EINVAL: 4756 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4757 break; 4758 case ENOENT: 4759 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4760 break; 4761 default: 4762 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4763 break; 4764 } 4765 } 4766 4767 free(nvbuf); 4768 4769 return (err); 4770} 4771 4772int 4773zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4774{ 4775 int err; 4776 char errbuf[1024]; 4777 4778 err = lzc_get_holds(zhp->zfs_name, nvl); 4779 4780 if (err != 0) { 4781 libzfs_handle_t *hdl = zhp->zfs_hdl; 4782 4783 (void) snprintf(errbuf, sizeof (errbuf), 4784 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4785 zhp->zfs_name); 4786 switch (err) { 4787 case ENOTSUP: 4788 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4789 "pool must be upgraded")); 4790 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4791 break; 4792 case EINVAL: 4793 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4794 break; 4795 case ENOENT: 4796 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4797 break; 4798 default: 4799 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4800 break; 4801 } 4802 } 4803 4804 return (err); 4805} 4806 4807/* 4808 * Convert the zvol's volume size to an appropriate reservation. 4809 * Note: If this routine is updated, it is necessary to update the ZFS test 4810 * suite's shell version in reservation.kshlib. 4811 */ 4812uint64_t 4813zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4814{ 4815 uint64_t numdb; 4816 uint64_t nblocks, volblocksize; 4817 int ncopies; 4818 char *strval; 4819 4820 if (nvlist_lookup_string(props, 4821 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4822 ncopies = atoi(strval); 4823 else 4824 ncopies = 1; 4825 if (nvlist_lookup_uint64(props, 4826 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4827 &volblocksize) != 0) 4828 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4829 nblocks = volsize/volblocksize; 4830 /* start with metadnode L0-L6 */ 4831 numdb = 7; 4832 /* calculate number of indirects */ 4833 while (nblocks > 1) { 4834 nblocks += DNODES_PER_LEVEL - 1; 4835 nblocks /= DNODES_PER_LEVEL; 4836 numdb += nblocks; 4837 } 4838 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4839 volsize *= ncopies; 4840 /* 4841 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4842 * compressed, but in practice they compress down to about 4843 * 1100 bytes 4844 */ 4845 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4846 volsize += numdb; 4847 return (volsize); 4848} 4849 4850/* 4851 * Attach/detach the given filesystem to/from the given jail. 4852 */ 4853int 4854zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4855{ 4856 libzfs_handle_t *hdl = zhp->zfs_hdl; 4857 zfs_cmd_t zc = { 0 }; 4858 char errbuf[1024]; 4859 unsigned long cmd; 4860 int ret; 4861 4862 if (attach) { 4863 (void) snprintf(errbuf, sizeof (errbuf), 4864 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4865 } else { 4866 (void) snprintf(errbuf, sizeof (errbuf), 4867 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4868 } 4869 4870 switch (zhp->zfs_type) { 4871 case ZFS_TYPE_VOLUME: 4872 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4873 "volumes can not be jailed")); 4874 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4875 case ZFS_TYPE_SNAPSHOT: 4876 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4877 "snapshots can not be jailed")); 4878 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4879 } 4880 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4881 4882 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4883 zc.zc_objset_type = DMU_OST_ZFS; 4884 zc.zc_jailid = jailid; 4885 4886 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4887 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4888 zfs_standard_error(hdl, errno, errbuf); 4889 4890 return (ret); 4891} 4892