libzfs_dataset.c revision 307053
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. All rights reserved. 28 * Copyright (c) 2013 Martin Matuska. All rights reserved. 29 * Copyright (c) 2013 Steven Hartland. All rights reserved. 30 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 31 * Copyright (c) 2014 Integros [integros.com] 32 */ 33 34#include <ctype.h> 35#include <errno.h> 36#include <libintl.h> 37#include <math.h> 38#include <stdio.h> 39#include <stdlib.h> 40#include <strings.h> 41#include <unistd.h> 42#include <stddef.h> 43#include <zone.h> 44#include <fcntl.h> 45#include <sys/mntent.h> 46#include <sys/mount.h> 47#include <priv.h> 48#include <pwd.h> 49#include <grp.h> 50#include <stddef.h> 51#include <idmap.h> 52 53#include <sys/dnode.h> 54#include <sys/spa.h> 55#include <sys/zap.h> 56#include <sys/misc.h> 57#include <libzfs.h> 58 59#include "zfs_namecheck.h" 60#include "zfs_prop.h" 61#include "libzfs_impl.h" 62#include "zfs_deleg.h" 63 64static int userquota_propname_decode(const char *propname, boolean_t zoned, 65 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 66 67/* 68 * Given a single type (not a mask of types), return the type in a human 69 * readable form. 70 */ 71const char * 72zfs_type_to_name(zfs_type_t type) 73{ 74 switch (type) { 75 case ZFS_TYPE_FILESYSTEM: 76 return (dgettext(TEXT_DOMAIN, "filesystem")); 77 case ZFS_TYPE_SNAPSHOT: 78 return (dgettext(TEXT_DOMAIN, "snapshot")); 79 case ZFS_TYPE_VOLUME: 80 return (dgettext(TEXT_DOMAIN, "volume")); 81 } 82 83 return (NULL); 84} 85 86/* 87 * Given a path and mask of ZFS types, return a string describing this dataset. 88 * This is used when we fail to open a dataset and we cannot get an exact type. 89 * We guess what the type would have been based on the path and the mask of 90 * acceptable types. 91 */ 92static const char * 93path_to_str(const char *path, int types) 94{ 95 /* 96 * When given a single type, always report the exact type. 97 */ 98 if (types == ZFS_TYPE_SNAPSHOT) 99 return (dgettext(TEXT_DOMAIN, "snapshot")); 100 if (types == ZFS_TYPE_FILESYSTEM) 101 return (dgettext(TEXT_DOMAIN, "filesystem")); 102 if (types == ZFS_TYPE_VOLUME) 103 return (dgettext(TEXT_DOMAIN, "volume")); 104 105 /* 106 * The user is requesting more than one type of dataset. If this is the 107 * case, consult the path itself. If we're looking for a snapshot, and 108 * a '@' is found, then report it as "snapshot". Otherwise, remove the 109 * snapshot attribute and try again. 110 */ 111 if (types & ZFS_TYPE_SNAPSHOT) { 112 if (strchr(path, '@') != NULL) 113 return (dgettext(TEXT_DOMAIN, "snapshot")); 114 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT)); 115 } 116 117 /* 118 * The user has requested either filesystems or volumes. 119 * We have no way of knowing a priori what type this would be, so always 120 * report it as "filesystem" or "volume", our two primitive types. 121 */ 122 if (types & ZFS_TYPE_FILESYSTEM) 123 return (dgettext(TEXT_DOMAIN, "filesystem")); 124 125 assert(types & ZFS_TYPE_VOLUME); 126 return (dgettext(TEXT_DOMAIN, "volume")); 127} 128 129/* 130 * Validate a ZFS path. This is used even before trying to open the dataset, to 131 * provide a more meaningful error message. We call zfs_error_aux() to 132 * explain exactly why the name was not valid. 133 */ 134int 135zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 136 boolean_t modifying) 137{ 138 namecheck_err_t why; 139 char what; 140 141 (void) zfs_prop_get_table(); 142 if (dataset_namecheck(path, &why, &what) != 0) { 143 if (hdl != NULL) { 144 switch (why) { 145 case NAME_ERR_TOOLONG: 146 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 147 "name is too long")); 148 break; 149 150 case NAME_ERR_LEADING_SLASH: 151 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 152 "leading slash in name")); 153 break; 154 155 case NAME_ERR_EMPTY_COMPONENT: 156 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 157 "empty component in name")); 158 break; 159 160 case NAME_ERR_TRAILING_SLASH: 161 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 162 "trailing slash in name")); 163 break; 164 165 case NAME_ERR_INVALCHAR: 166 zfs_error_aux(hdl, 167 dgettext(TEXT_DOMAIN, "invalid character " 168 "'%c' in name"), what); 169 break; 170 171 case NAME_ERR_MULTIPLE_AT: 172 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 173 "multiple '@' delimiters in name")); 174 break; 175 176 case NAME_ERR_NOLETTER: 177 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 178 "pool doesn't begin with a letter")); 179 break; 180 181 case NAME_ERR_RESERVED: 182 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 183 "name is reserved")); 184 break; 185 186 case NAME_ERR_DISKLIKE: 187 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 188 "reserved disk name")); 189 break; 190 } 191 } 192 193 return (0); 194 } 195 196 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 197 if (hdl != NULL) 198 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 199 "snapshot delimiter '@' in filesystem name")); 200 return (0); 201 } 202 203 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 204 if (hdl != NULL) 205 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 206 "missing '@' delimiter in snapshot name")); 207 return (0); 208 } 209 210 if (modifying && strchr(path, '%') != NULL) { 211 if (hdl != NULL) 212 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 213 "invalid character %c in name"), '%'); 214 return (0); 215 } 216 217 return (-1); 218} 219 220int 221zfs_name_valid(const char *name, zfs_type_t type) 222{ 223 if (type == ZFS_TYPE_POOL) 224 return (zpool_name_valid(NULL, B_FALSE, name)); 225 return (zfs_validate_name(NULL, name, type, B_FALSE)); 226} 227 228/* 229 * This function takes the raw DSL properties, and filters out the user-defined 230 * properties into a separate nvlist. 231 */ 232static nvlist_t * 233process_user_props(zfs_handle_t *zhp, nvlist_t *props) 234{ 235 libzfs_handle_t *hdl = zhp->zfs_hdl; 236 nvpair_t *elem; 237 nvlist_t *propval; 238 nvlist_t *nvl; 239 240 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 241 (void) no_memory(hdl); 242 return (NULL); 243 } 244 245 elem = NULL; 246 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 247 if (!zfs_prop_user(nvpair_name(elem))) 248 continue; 249 250 verify(nvpair_value_nvlist(elem, &propval) == 0); 251 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 252 nvlist_free(nvl); 253 (void) no_memory(hdl); 254 return (NULL); 255 } 256 } 257 258 return (nvl); 259} 260 261static zpool_handle_t * 262zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 263{ 264 libzfs_handle_t *hdl = zhp->zfs_hdl; 265 zpool_handle_t *zph; 266 267 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 268 if (hdl->libzfs_pool_handles != NULL) 269 zph->zpool_next = hdl->libzfs_pool_handles; 270 hdl->libzfs_pool_handles = zph; 271 } 272 return (zph); 273} 274 275static zpool_handle_t * 276zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 277{ 278 libzfs_handle_t *hdl = zhp->zfs_hdl; 279 zpool_handle_t *zph = hdl->libzfs_pool_handles; 280 281 while ((zph != NULL) && 282 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 283 zph = zph->zpool_next; 284 return (zph); 285} 286 287/* 288 * Returns a handle to the pool that contains the provided dataset. 289 * If a handle to that pool already exists then that handle is returned. 290 * Otherwise, a new handle is created and added to the list of handles. 291 */ 292static zpool_handle_t * 293zpool_handle(zfs_handle_t *zhp) 294{ 295 char *pool_name; 296 int len; 297 zpool_handle_t *zph; 298 299 len = strcspn(zhp->zfs_name, "/@#") + 1; 300 pool_name = zfs_alloc(zhp->zfs_hdl, len); 301 (void) strlcpy(pool_name, zhp->zfs_name, len); 302 303 zph = zpool_find_handle(zhp, pool_name, len); 304 if (zph == NULL) 305 zph = zpool_add_handle(zhp, pool_name); 306 307 free(pool_name); 308 return (zph); 309} 310 311void 312zpool_free_handles(libzfs_handle_t *hdl) 313{ 314 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 315 316 while (zph != NULL) { 317 next = zph->zpool_next; 318 zpool_close(zph); 319 zph = next; 320 } 321 hdl->libzfs_pool_handles = NULL; 322} 323 324/* 325 * Utility function to gather stats (objset and zpl) for the given object. 326 */ 327static int 328get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 329{ 330 libzfs_handle_t *hdl = zhp->zfs_hdl; 331 332 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 333 334 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { 335 if (errno == ENOMEM) { 336 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 337 return (-1); 338 } 339 } else { 340 return (-1); 341 } 342 } 343 return (0); 344} 345 346/* 347 * Utility function to get the received properties of the given object. 348 */ 349static int 350get_recvd_props_ioctl(zfs_handle_t *zhp) 351{ 352 libzfs_handle_t *hdl = zhp->zfs_hdl; 353 nvlist_t *recvdprops; 354 zfs_cmd_t zc = { 0 }; 355 int err; 356 357 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 358 return (-1); 359 360 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 361 362 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 363 if (errno == ENOMEM) { 364 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 365 return (-1); 366 } 367 } else { 368 zcmd_free_nvlists(&zc); 369 return (-1); 370 } 371 } 372 373 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 374 zcmd_free_nvlists(&zc); 375 if (err != 0) 376 return (-1); 377 378 nvlist_free(zhp->zfs_recvd_props); 379 zhp->zfs_recvd_props = recvdprops; 380 381 return (0); 382} 383 384static int 385put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 386{ 387 nvlist_t *allprops, *userprops; 388 389 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 390 391 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 392 return (-1); 393 } 394 395 /* 396 * XXX Why do we store the user props separately, in addition to 397 * storing them in zfs_props? 398 */ 399 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 400 nvlist_free(allprops); 401 return (-1); 402 } 403 404 nvlist_free(zhp->zfs_props); 405 nvlist_free(zhp->zfs_user_props); 406 407 zhp->zfs_props = allprops; 408 zhp->zfs_user_props = userprops; 409 410 return (0); 411} 412 413static int 414get_stats(zfs_handle_t *zhp) 415{ 416 int rc = 0; 417 zfs_cmd_t zc = { 0 }; 418 419 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 420 return (-1); 421 if (get_stats_ioctl(zhp, &zc) != 0) 422 rc = -1; 423 else if (put_stats_zhdl(zhp, &zc) != 0) 424 rc = -1; 425 zcmd_free_nvlists(&zc); 426 return (rc); 427} 428 429/* 430 * Refresh the properties currently stored in the handle. 431 */ 432void 433zfs_refresh_properties(zfs_handle_t *zhp) 434{ 435 (void) get_stats(zhp); 436} 437 438/* 439 * Makes a handle from the given dataset name. Used by zfs_open() and 440 * zfs_iter_* to create child handles on the fly. 441 */ 442static int 443make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 444{ 445 if (put_stats_zhdl(zhp, zc) != 0) 446 return (-1); 447 448 /* 449 * We've managed to open the dataset and gather statistics. Determine 450 * the high-level type. 451 */ 452 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 453 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 454 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 455 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 456 else 457 abort(); 458 459 if (zhp->zfs_dmustats.dds_is_snapshot) 460 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 461 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 462 zhp->zfs_type = ZFS_TYPE_VOLUME; 463 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 464 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 465 else 466 abort(); /* we should never see any other types */ 467 468 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 469 return (-1); 470 471 return (0); 472} 473 474zfs_handle_t * 475make_dataset_handle(libzfs_handle_t *hdl, const char *path) 476{ 477 zfs_cmd_t zc = { 0 }; 478 479 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 480 481 if (zhp == NULL) 482 return (NULL); 483 484 zhp->zfs_hdl = hdl; 485 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 486 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 487 free(zhp); 488 return (NULL); 489 } 490 if (get_stats_ioctl(zhp, &zc) == -1) { 491 zcmd_free_nvlists(&zc); 492 free(zhp); 493 return (NULL); 494 } 495 if (make_dataset_handle_common(zhp, &zc) == -1) { 496 free(zhp); 497 zhp = NULL; 498 } 499 zcmd_free_nvlists(&zc); 500 return (zhp); 501} 502 503zfs_handle_t * 504make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 505{ 506 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 507 508 if (zhp == NULL) 509 return (NULL); 510 511 zhp->zfs_hdl = hdl; 512 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 513 if (make_dataset_handle_common(zhp, zc) == -1) { 514 free(zhp); 515 return (NULL); 516 } 517 return (zhp); 518} 519 520zfs_handle_t * 521make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 522{ 523 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 524 525 if (zhp == NULL) 526 return (NULL); 527 528 zhp->zfs_hdl = pzhp->zfs_hdl; 529 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 530 zhp->zfs_head_type = pzhp->zfs_type; 531 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 532 zhp->zpool_hdl = zpool_handle(zhp); 533 return (zhp); 534} 535 536zfs_handle_t * 537zfs_handle_dup(zfs_handle_t *zhp_orig) 538{ 539 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 540 541 if (zhp == NULL) 542 return (NULL); 543 544 zhp->zfs_hdl = zhp_orig->zfs_hdl; 545 zhp->zpool_hdl = zhp_orig->zpool_hdl; 546 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 547 sizeof (zhp->zfs_name)); 548 zhp->zfs_type = zhp_orig->zfs_type; 549 zhp->zfs_head_type = zhp_orig->zfs_head_type; 550 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 551 if (zhp_orig->zfs_props != NULL) { 552 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 553 (void) no_memory(zhp->zfs_hdl); 554 zfs_close(zhp); 555 return (NULL); 556 } 557 } 558 if (zhp_orig->zfs_user_props != NULL) { 559 if (nvlist_dup(zhp_orig->zfs_user_props, 560 &zhp->zfs_user_props, 0) != 0) { 561 (void) no_memory(zhp->zfs_hdl); 562 zfs_close(zhp); 563 return (NULL); 564 } 565 } 566 if (zhp_orig->zfs_recvd_props != NULL) { 567 if (nvlist_dup(zhp_orig->zfs_recvd_props, 568 &zhp->zfs_recvd_props, 0)) { 569 (void) no_memory(zhp->zfs_hdl); 570 zfs_close(zhp); 571 return (NULL); 572 } 573 } 574 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 575 if (zhp_orig->zfs_mntopts != NULL) { 576 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 577 zhp_orig->zfs_mntopts); 578 } 579 zhp->zfs_props_table = zhp_orig->zfs_props_table; 580 return (zhp); 581} 582 583boolean_t 584zfs_bookmark_exists(const char *path) 585{ 586 nvlist_t *bmarks; 587 nvlist_t *props; 588 char fsname[ZFS_MAXNAMELEN]; 589 char *bmark_name; 590 char *pound; 591 int err; 592 boolean_t rv; 593 594 595 (void) strlcpy(fsname, path, sizeof (fsname)); 596 pound = strchr(fsname, '#'); 597 if (pound == NULL) 598 return (B_FALSE); 599 600 *pound = '\0'; 601 bmark_name = pound + 1; 602 props = fnvlist_alloc(); 603 err = lzc_get_bookmarks(fsname, props, &bmarks); 604 nvlist_free(props); 605 if (err != 0) { 606 nvlist_free(bmarks); 607 return (B_FALSE); 608 } 609 610 rv = nvlist_exists(bmarks, bmark_name); 611 nvlist_free(bmarks); 612 return (rv); 613} 614 615zfs_handle_t * 616make_bookmark_handle(zfs_handle_t *parent, const char *path, 617 nvlist_t *bmark_props) 618{ 619 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 620 621 if (zhp == NULL) 622 return (NULL); 623 624 /* Fill in the name. */ 625 zhp->zfs_hdl = parent->zfs_hdl; 626 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 627 628 /* Set the property lists. */ 629 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 630 free(zhp); 631 return (NULL); 632 } 633 634 /* Set the types. */ 635 zhp->zfs_head_type = parent->zfs_head_type; 636 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 637 638 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 639 nvlist_free(zhp->zfs_props); 640 free(zhp); 641 return (NULL); 642 } 643 644 return (zhp); 645} 646 647/* 648 * Opens the given snapshot, filesystem, or volume. The 'types' 649 * argument is a mask of acceptable types. The function will print an 650 * appropriate error message and return NULL if it can't be opened. 651 */ 652zfs_handle_t * 653zfs_open(libzfs_handle_t *hdl, const char *path, int types) 654{ 655 zfs_handle_t *zhp; 656 char errbuf[1024]; 657 658 (void) snprintf(errbuf, sizeof (errbuf), 659 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 660 661 /* 662 * Validate the name before we even try to open it. 663 */ 664 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) { 665 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 666 "invalid dataset name")); 667 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 668 return (NULL); 669 } 670 671 /* 672 * Try to get stats for the dataset, which will tell us if it exists. 673 */ 674 errno = 0; 675 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 676 (void) zfs_standard_error(hdl, errno, errbuf); 677 return (NULL); 678 } 679 680 if (zhp == NULL) { 681 char *at = strchr(path, '@'); 682 683 if (at != NULL) 684 *at = '\0'; 685 errno = 0; 686 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 687 (void) zfs_standard_error(hdl, errno, errbuf); 688 return (NULL); 689 } 690 if (at != NULL) 691 *at = '@'; 692 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 693 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 694 } 695 696 if (!(types & zhp->zfs_type)) { 697 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 698 zfs_close(zhp); 699 return (NULL); 700 } 701 702 return (zhp); 703} 704 705/* 706 * Release a ZFS handle. Nothing to do but free the associated memory. 707 */ 708void 709zfs_close(zfs_handle_t *zhp) 710{ 711 if (zhp->zfs_mntopts) 712 free(zhp->zfs_mntopts); 713 nvlist_free(zhp->zfs_props); 714 nvlist_free(zhp->zfs_user_props); 715 nvlist_free(zhp->zfs_recvd_props); 716 free(zhp); 717} 718 719typedef struct mnttab_node { 720 struct mnttab mtn_mt; 721 avl_node_t mtn_node; 722} mnttab_node_t; 723 724static int 725libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 726{ 727 const mnttab_node_t *mtn1 = arg1; 728 const mnttab_node_t *mtn2 = arg2; 729 int rv; 730 731 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 732 733 if (rv == 0) 734 return (0); 735 return (rv > 0 ? 1 : -1); 736} 737 738void 739libzfs_mnttab_init(libzfs_handle_t *hdl) 740{ 741 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 742 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 743 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 744} 745 746void 747libzfs_mnttab_update(libzfs_handle_t *hdl) 748{ 749 struct mnttab entry; 750 751 rewind(hdl->libzfs_mnttab); 752 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 753 mnttab_node_t *mtn; 754 755 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 756 continue; 757 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 758 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 759 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 760 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 761 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 762 avl_add(&hdl->libzfs_mnttab_cache, mtn); 763 } 764} 765 766void 767libzfs_mnttab_fini(libzfs_handle_t *hdl) 768{ 769 void *cookie = NULL; 770 mnttab_node_t *mtn; 771 772 while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) { 773 free(mtn->mtn_mt.mnt_special); 774 free(mtn->mtn_mt.mnt_mountp); 775 free(mtn->mtn_mt.mnt_fstype); 776 free(mtn->mtn_mt.mnt_mntopts); 777 free(mtn); 778 } 779 avl_destroy(&hdl->libzfs_mnttab_cache); 780} 781 782void 783libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 784{ 785 hdl->libzfs_mnttab_enable = enable; 786} 787 788int 789libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 790 struct mnttab *entry) 791{ 792 mnttab_node_t find; 793 mnttab_node_t *mtn; 794 795 if (!hdl->libzfs_mnttab_enable) { 796 struct mnttab srch = { 0 }; 797 798 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 799 libzfs_mnttab_fini(hdl); 800 rewind(hdl->libzfs_mnttab); 801 srch.mnt_special = (char *)fsname; 802 srch.mnt_fstype = MNTTYPE_ZFS; 803 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 804 return (0); 805 else 806 return (ENOENT); 807 } 808 809 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 810 libzfs_mnttab_update(hdl); 811 812 find.mtn_mt.mnt_special = (char *)fsname; 813 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 814 if (mtn) { 815 *entry = mtn->mtn_mt; 816 return (0); 817 } 818 return (ENOENT); 819} 820 821void 822libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 823 const char *mountp, const char *mntopts) 824{ 825 mnttab_node_t *mtn; 826 827 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 828 return; 829 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 830 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 831 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 832 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 833 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 834 avl_add(&hdl->libzfs_mnttab_cache, mtn); 835} 836 837void 838libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 839{ 840 mnttab_node_t find; 841 mnttab_node_t *ret; 842 843 find.mtn_mt.mnt_special = (char *)fsname; 844 if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) { 845 avl_remove(&hdl->libzfs_mnttab_cache, ret); 846 free(ret->mtn_mt.mnt_special); 847 free(ret->mtn_mt.mnt_mountp); 848 free(ret->mtn_mt.mnt_fstype); 849 free(ret->mtn_mt.mnt_mntopts); 850 free(ret); 851 } 852} 853 854int 855zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 856{ 857 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 858 859 if (zpool_handle == NULL) 860 return (-1); 861 862 *spa_version = zpool_get_prop_int(zpool_handle, 863 ZPOOL_PROP_VERSION, NULL); 864 return (0); 865} 866 867/* 868 * The choice of reservation property depends on the SPA version. 869 */ 870static int 871zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 872{ 873 int spa_version; 874 875 if (zfs_spa_version(zhp, &spa_version) < 0) 876 return (-1); 877 878 if (spa_version >= SPA_VERSION_REFRESERVATION) 879 *resv_prop = ZFS_PROP_REFRESERVATION; 880 else 881 *resv_prop = ZFS_PROP_RESERVATION; 882 883 return (0); 884} 885 886/* 887 * Given an nvlist of properties to set, validates that they are correct, and 888 * parses any numeric properties (index, boolean, etc) if they are specified as 889 * strings. 890 */ 891nvlist_t * 892zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 893 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 894 const char *errbuf) 895{ 896 nvpair_t *elem; 897 uint64_t intval; 898 char *strval; 899 zfs_prop_t prop; 900 nvlist_t *ret; 901 int chosen_normal = -1; 902 int chosen_utf = -1; 903 904 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 905 (void) no_memory(hdl); 906 return (NULL); 907 } 908 909 /* 910 * Make sure this property is valid and applies to this type. 911 */ 912 913 elem = NULL; 914 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 915 const char *propname = nvpair_name(elem); 916 917 prop = zfs_name_to_prop(propname); 918 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 919 /* 920 * This is a user property: make sure it's a 921 * string, and that it's less than ZAP_MAXNAMELEN. 922 */ 923 if (nvpair_type(elem) != DATA_TYPE_STRING) { 924 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 925 "'%s' must be a string"), propname); 926 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 927 goto error; 928 } 929 930 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 931 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 932 "property name '%s' is too long"), 933 propname); 934 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 935 goto error; 936 } 937 938 (void) nvpair_value_string(elem, &strval); 939 if (nvlist_add_string(ret, propname, strval) != 0) { 940 (void) no_memory(hdl); 941 goto error; 942 } 943 continue; 944 } 945 946 /* 947 * Currently, only user properties can be modified on 948 * snapshots. 949 */ 950 if (type == ZFS_TYPE_SNAPSHOT) { 951 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 952 "this property can not be modified for snapshots")); 953 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 954 goto error; 955 } 956 957 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 958 zfs_userquota_prop_t uqtype; 959 char newpropname[128]; 960 char domain[128]; 961 uint64_t rid; 962 uint64_t valary[3]; 963 964 if (userquota_propname_decode(propname, zoned, 965 &uqtype, domain, sizeof (domain), &rid) != 0) { 966 zfs_error_aux(hdl, 967 dgettext(TEXT_DOMAIN, 968 "'%s' has an invalid user/group name"), 969 propname); 970 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 971 goto error; 972 } 973 974 if (uqtype != ZFS_PROP_USERQUOTA && 975 uqtype != ZFS_PROP_GROUPQUOTA) { 976 zfs_error_aux(hdl, 977 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 978 propname); 979 (void) zfs_error(hdl, EZFS_PROPREADONLY, 980 errbuf); 981 goto error; 982 } 983 984 if (nvpair_type(elem) == DATA_TYPE_STRING) { 985 (void) nvpair_value_string(elem, &strval); 986 if (strcmp(strval, "none") == 0) { 987 intval = 0; 988 } else if (zfs_nicestrtonum(hdl, 989 strval, &intval) != 0) { 990 (void) zfs_error(hdl, 991 EZFS_BADPROP, errbuf); 992 goto error; 993 } 994 } else if (nvpair_type(elem) == 995 DATA_TYPE_UINT64) { 996 (void) nvpair_value_uint64(elem, &intval); 997 if (intval == 0) { 998 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 999 "use 'none' to disable " 1000 "userquota/groupquota")); 1001 goto error; 1002 } 1003 } else { 1004 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1005 "'%s' must be a number"), propname); 1006 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1007 goto error; 1008 } 1009 1010 /* 1011 * Encode the prop name as 1012 * userquota@<hex-rid>-domain, to make it easy 1013 * for the kernel to decode. 1014 */ 1015 (void) snprintf(newpropname, sizeof (newpropname), 1016 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 1017 (longlong_t)rid, domain); 1018 valary[0] = uqtype; 1019 valary[1] = rid; 1020 valary[2] = intval; 1021 if (nvlist_add_uint64_array(ret, newpropname, 1022 valary, 3) != 0) { 1023 (void) no_memory(hdl); 1024 goto error; 1025 } 1026 continue; 1027 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 1028 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1029 "'%s' is readonly"), 1030 propname); 1031 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1032 goto error; 1033 } 1034 1035 if (prop == ZPROP_INVAL) { 1036 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1037 "invalid property '%s'"), propname); 1038 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1039 goto error; 1040 } 1041 1042 if (!zfs_prop_valid_for_type(prop, type)) { 1043 zfs_error_aux(hdl, 1044 dgettext(TEXT_DOMAIN, "'%s' does not " 1045 "apply to datasets of this type"), propname); 1046 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1047 goto error; 1048 } 1049 1050 if (zfs_prop_readonly(prop) && 1051 (!zfs_prop_setonce(prop) || zhp != NULL)) { 1052 zfs_error_aux(hdl, 1053 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1054 propname); 1055 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1056 goto error; 1057 } 1058 1059 if (zprop_parse_value(hdl, elem, prop, type, ret, 1060 &strval, &intval, errbuf) != 0) 1061 goto error; 1062 1063 /* 1064 * Perform some additional checks for specific properties. 1065 */ 1066 switch (prop) { 1067 case ZFS_PROP_VERSION: 1068 { 1069 int version; 1070 1071 if (zhp == NULL) 1072 break; 1073 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1074 if (intval < version) { 1075 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1076 "Can not downgrade; already at version %u"), 1077 version); 1078 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1079 goto error; 1080 } 1081 break; 1082 } 1083 1084 case ZFS_PROP_VOLBLOCKSIZE: 1085 case ZFS_PROP_RECORDSIZE: 1086 { 1087 int maxbs = SPA_MAXBLOCKSIZE; 1088 if (zpool_hdl != NULL) { 1089 maxbs = zpool_get_prop_int(zpool_hdl, 1090 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1091 } 1092 /* 1093 * Volumes are limited to a volblocksize of 128KB, 1094 * because they typically service workloads with 1095 * small random writes, which incur a large performance 1096 * penalty with large blocks. 1097 */ 1098 if (prop == ZFS_PROP_VOLBLOCKSIZE) 1099 maxbs = SPA_OLD_MAXBLOCKSIZE; 1100 /* 1101 * The value must be a power of two between 1102 * SPA_MINBLOCKSIZE and maxbs. 1103 */ 1104 if (intval < SPA_MINBLOCKSIZE || 1105 intval > maxbs || !ISP2(intval)) { 1106 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1107 "'%s' must be power of 2 from 512B " 1108 "to %uKB"), propname, maxbs >> 10); 1109 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1110 goto error; 1111 } 1112 break; 1113 } 1114 case ZFS_PROP_MLSLABEL: 1115 { 1116#ifdef illumos 1117 /* 1118 * Verify the mlslabel string and convert to 1119 * internal hex label string. 1120 */ 1121 1122 m_label_t *new_sl; 1123 char *hex = NULL; /* internal label string */ 1124 1125 /* Default value is already OK. */ 1126 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1127 break; 1128 1129 /* Verify the label can be converted to binary form */ 1130 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1131 (str_to_label(strval, &new_sl, MAC_LABEL, 1132 L_NO_CORRECTION, NULL) == -1)) { 1133 goto badlabel; 1134 } 1135 1136 /* Now translate to hex internal label string */ 1137 if (label_to_str(new_sl, &hex, M_INTERNAL, 1138 DEF_NAMES) != 0) { 1139 if (hex) 1140 free(hex); 1141 goto badlabel; 1142 } 1143 m_label_free(new_sl); 1144 1145 /* If string is already in internal form, we're done. */ 1146 if (strcmp(strval, hex) == 0) { 1147 free(hex); 1148 break; 1149 } 1150 1151 /* Replace the label string with the internal form. */ 1152 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1153 DATA_TYPE_STRING); 1154 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1155 hex) == 0); 1156 free(hex); 1157 1158 break; 1159 1160badlabel: 1161 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1162 "invalid mlslabel '%s'"), strval); 1163 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1164 m_label_free(new_sl); /* OK if null */ 1165#else /* !illumos */ 1166 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1167 "mlslabel is not supported on FreeBSD")); 1168 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1169#endif /* illumos */ 1170 goto error; 1171 1172 } 1173 1174 case ZFS_PROP_MOUNTPOINT: 1175 { 1176 namecheck_err_t why; 1177 1178 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1179 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1180 break; 1181 1182 if (mountpoint_namecheck(strval, &why)) { 1183 switch (why) { 1184 case NAME_ERR_LEADING_SLASH: 1185 zfs_error_aux(hdl, 1186 dgettext(TEXT_DOMAIN, 1187 "'%s' must be an absolute path, " 1188 "'none', or 'legacy'"), propname); 1189 break; 1190 case NAME_ERR_TOOLONG: 1191 zfs_error_aux(hdl, 1192 dgettext(TEXT_DOMAIN, 1193 "component of '%s' is too long"), 1194 propname); 1195 break; 1196 } 1197 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1198 goto error; 1199 } 1200 } 1201 1202 /*FALLTHRU*/ 1203 1204 case ZFS_PROP_SHARESMB: 1205 case ZFS_PROP_SHARENFS: 1206 /* 1207 * For the mountpoint and sharenfs or sharesmb 1208 * properties, check if it can be set in a 1209 * global/non-global zone based on 1210 * the zoned property value: 1211 * 1212 * global zone non-global zone 1213 * -------------------------------------------------- 1214 * zoned=on mountpoint (no) mountpoint (yes) 1215 * sharenfs (no) sharenfs (no) 1216 * sharesmb (no) sharesmb (no) 1217 * 1218 * zoned=off mountpoint (yes) N/A 1219 * sharenfs (yes) 1220 * sharesmb (yes) 1221 */ 1222 if (zoned) { 1223 if (getzoneid() == GLOBAL_ZONEID) { 1224 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1225 "'%s' cannot be set on " 1226 "dataset in a non-global zone"), 1227 propname); 1228 (void) zfs_error(hdl, EZFS_ZONED, 1229 errbuf); 1230 goto error; 1231 } else if (prop == ZFS_PROP_SHARENFS || 1232 prop == ZFS_PROP_SHARESMB) { 1233 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1234 "'%s' cannot be set in " 1235 "a non-global zone"), propname); 1236 (void) zfs_error(hdl, EZFS_ZONED, 1237 errbuf); 1238 goto error; 1239 } 1240 } else if (getzoneid() != GLOBAL_ZONEID) { 1241 /* 1242 * If zoned property is 'off', this must be in 1243 * a global zone. If not, something is wrong. 1244 */ 1245 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1246 "'%s' cannot be set while dataset " 1247 "'zoned' property is set"), propname); 1248 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1249 goto error; 1250 } 1251 1252 /* 1253 * At this point, it is legitimate to set the 1254 * property. Now we want to make sure that the 1255 * property value is valid if it is sharenfs. 1256 */ 1257 if ((prop == ZFS_PROP_SHARENFS || 1258 prop == ZFS_PROP_SHARESMB) && 1259 strcmp(strval, "on") != 0 && 1260 strcmp(strval, "off") != 0) { 1261 zfs_share_proto_t proto; 1262 1263 if (prop == ZFS_PROP_SHARESMB) 1264 proto = PROTO_SMB; 1265 else 1266 proto = PROTO_NFS; 1267 1268 /* 1269 * Must be an valid sharing protocol 1270 * option string so init the libshare 1271 * in order to enable the parser and 1272 * then parse the options. We use the 1273 * control API since we don't care about 1274 * the current configuration and don't 1275 * want the overhead of loading it 1276 * until we actually do something. 1277 */ 1278 1279 if (zfs_init_libshare(hdl, 1280 SA_INIT_CONTROL_API) != SA_OK) { 1281 /* 1282 * An error occurred so we can't do 1283 * anything 1284 */ 1285 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1286 "'%s' cannot be set: problem " 1287 "in share initialization"), 1288 propname); 1289 (void) zfs_error(hdl, EZFS_BADPROP, 1290 errbuf); 1291 goto error; 1292 } 1293 1294 if (zfs_parse_options(strval, proto) != SA_OK) { 1295 /* 1296 * There was an error in parsing so 1297 * deal with it by issuing an error 1298 * message and leaving after 1299 * uninitializing the the libshare 1300 * interface. 1301 */ 1302 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1303 "'%s' cannot be set to invalid " 1304 "options"), propname); 1305 (void) zfs_error(hdl, EZFS_BADPROP, 1306 errbuf); 1307 zfs_uninit_libshare(hdl); 1308 goto error; 1309 } 1310 zfs_uninit_libshare(hdl); 1311 } 1312 1313 break; 1314 case ZFS_PROP_UTF8ONLY: 1315 chosen_utf = (int)intval; 1316 break; 1317 case ZFS_PROP_NORMALIZE: 1318 chosen_normal = (int)intval; 1319 break; 1320 } 1321 1322 /* 1323 * For changes to existing volumes, we have some additional 1324 * checks to enforce. 1325 */ 1326 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1327 uint64_t volsize = zfs_prop_get_int(zhp, 1328 ZFS_PROP_VOLSIZE); 1329 uint64_t blocksize = zfs_prop_get_int(zhp, 1330 ZFS_PROP_VOLBLOCKSIZE); 1331 char buf[64]; 1332 1333 switch (prop) { 1334 case ZFS_PROP_RESERVATION: 1335 case ZFS_PROP_REFRESERVATION: 1336 if (intval > volsize) { 1337 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1338 "'%s' is greater than current " 1339 "volume size"), propname); 1340 (void) zfs_error(hdl, EZFS_BADPROP, 1341 errbuf); 1342 goto error; 1343 } 1344 break; 1345 1346 case ZFS_PROP_VOLSIZE: 1347 if (intval % blocksize != 0) { 1348 zfs_nicenum(blocksize, buf, 1349 sizeof (buf)); 1350 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1351 "'%s' must be a multiple of " 1352 "volume block size (%s)"), 1353 propname, buf); 1354 (void) zfs_error(hdl, EZFS_BADPROP, 1355 errbuf); 1356 goto error; 1357 } 1358 1359 if (intval == 0) { 1360 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1361 "'%s' cannot be zero"), 1362 propname); 1363 (void) zfs_error(hdl, EZFS_BADPROP, 1364 errbuf); 1365 goto error; 1366 } 1367 break; 1368 } 1369 } 1370 } 1371 1372 /* 1373 * If normalization was chosen, but no UTF8 choice was made, 1374 * enforce rejection of non-UTF8 names. 1375 * 1376 * If normalization was chosen, but rejecting non-UTF8 names 1377 * was explicitly not chosen, it is an error. 1378 */ 1379 if (chosen_normal > 0 && chosen_utf < 0) { 1380 if (nvlist_add_uint64(ret, 1381 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1382 (void) no_memory(hdl); 1383 goto error; 1384 } 1385 } else if (chosen_normal > 0 && chosen_utf == 0) { 1386 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1387 "'%s' must be set 'on' if normalization chosen"), 1388 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1389 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1390 goto error; 1391 } 1392 return (ret); 1393 1394error: 1395 nvlist_free(ret); 1396 return (NULL); 1397} 1398 1399int 1400zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1401{ 1402 uint64_t old_volsize; 1403 uint64_t new_volsize; 1404 uint64_t old_reservation; 1405 uint64_t new_reservation; 1406 zfs_prop_t resv_prop; 1407 nvlist_t *props; 1408 1409 /* 1410 * If this is an existing volume, and someone is setting the volsize, 1411 * make sure that it matches the reservation, or add it if necessary. 1412 */ 1413 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1414 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1415 return (-1); 1416 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1417 1418 props = fnvlist_alloc(); 1419 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1420 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1421 1422 if ((zvol_volsize_to_reservation(old_volsize, props) != 1423 old_reservation) || nvlist_exists(nvl, 1424 zfs_prop_to_name(resv_prop))) { 1425 fnvlist_free(props); 1426 return (0); 1427 } 1428 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1429 &new_volsize) != 0) { 1430 fnvlist_free(props); 1431 return (-1); 1432 } 1433 new_reservation = zvol_volsize_to_reservation(new_volsize, props); 1434 fnvlist_free(props); 1435 1436 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1437 new_reservation) != 0) { 1438 (void) no_memory(zhp->zfs_hdl); 1439 return (-1); 1440 } 1441 return (1); 1442} 1443 1444void 1445zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1446 char *errbuf) 1447{ 1448 switch (err) { 1449 1450 case ENOSPC: 1451 /* 1452 * For quotas and reservations, ENOSPC indicates 1453 * something different; setting a quota or reservation 1454 * doesn't use any disk space. 1455 */ 1456 switch (prop) { 1457 case ZFS_PROP_QUOTA: 1458 case ZFS_PROP_REFQUOTA: 1459 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1460 "size is less than current used or " 1461 "reserved space")); 1462 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1463 break; 1464 1465 case ZFS_PROP_RESERVATION: 1466 case ZFS_PROP_REFRESERVATION: 1467 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1468 "size is greater than available space")); 1469 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1470 break; 1471 1472 default: 1473 (void) zfs_standard_error(hdl, err, errbuf); 1474 break; 1475 } 1476 break; 1477 1478 case EBUSY: 1479 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1480 break; 1481 1482 case EROFS: 1483 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1484 break; 1485 1486 case ENOTSUP: 1487 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1488 "pool and or dataset must be upgraded to set this " 1489 "property or value")); 1490 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1491 break; 1492 1493 case ERANGE: 1494 case EDOM: 1495 if (prop == ZFS_PROP_COMPRESSION || 1496 prop == ZFS_PROP_RECORDSIZE) { 1497 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1498 "property setting is not allowed on " 1499 "bootable datasets")); 1500 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1501 } else if (prop == ZFS_PROP_CHECKSUM || 1502 prop == ZFS_PROP_DEDUP) { 1503 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1504 "property setting is not allowed on " 1505 "root pools")); 1506 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1507 } else { 1508 (void) zfs_standard_error(hdl, err, errbuf); 1509 } 1510 break; 1511 1512 case EINVAL: 1513 if (prop == ZPROP_INVAL) { 1514 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1515 } else { 1516 (void) zfs_standard_error(hdl, err, errbuf); 1517 } 1518 break; 1519 1520 case EOVERFLOW: 1521 /* 1522 * This platform can't address a volume this big. 1523 */ 1524#ifdef _ILP32 1525 if (prop == ZFS_PROP_VOLSIZE) { 1526 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1527 break; 1528 } 1529#endif 1530 /* FALLTHROUGH */ 1531 default: 1532 (void) zfs_standard_error(hdl, err, errbuf); 1533 } 1534} 1535 1536/* 1537 * Given a property name and value, set the property for the given dataset. 1538 */ 1539int 1540zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1541{ 1542 int ret = -1; 1543 char errbuf[1024]; 1544 libzfs_handle_t *hdl = zhp->zfs_hdl; 1545 nvlist_t *nvl = NULL; 1546 1547 (void) snprintf(errbuf, sizeof (errbuf), 1548 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1549 zhp->zfs_name); 1550 1551 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1552 nvlist_add_string(nvl, propname, propval) != 0) { 1553 (void) no_memory(hdl); 1554 goto error; 1555 } 1556 1557 ret = zfs_prop_set_list(zhp, nvl); 1558 1559error: 1560 nvlist_free(nvl); 1561 return (ret); 1562} 1563 1564 1565 1566/* 1567 * Given an nvlist of property names and values, set the properties for the 1568 * given dataset. 1569 */ 1570int 1571zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1572{ 1573 zfs_cmd_t zc = { 0 }; 1574 int ret = -1; 1575 prop_changelist_t **cls = NULL; 1576 int cl_idx; 1577 char errbuf[1024]; 1578 libzfs_handle_t *hdl = zhp->zfs_hdl; 1579 nvlist_t *nvl; 1580 int nvl_len; 1581 int added_resv; 1582 1583 (void) snprintf(errbuf, sizeof (errbuf), 1584 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1585 zhp->zfs_name); 1586 1587 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1588 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1589 errbuf)) == NULL) 1590 goto error; 1591 1592 /* 1593 * We have to check for any extra properties which need to be added 1594 * before computing the length of the nvlist. 1595 */ 1596 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1597 elem != NULL; 1598 elem = nvlist_next_nvpair(nvl, elem)) { 1599 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1600 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1601 goto error; 1602 } 1603 } 1604 /* 1605 * Check how many properties we're setting and allocate an array to 1606 * store changelist pointers for postfix(). 1607 */ 1608 nvl_len = 0; 1609 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1610 elem != NULL; 1611 elem = nvlist_next_nvpair(nvl, elem)) 1612 nvl_len++; 1613 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1614 goto error; 1615 1616 cl_idx = 0; 1617 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1618 elem != NULL; 1619 elem = nvlist_next_nvpair(nvl, elem)) { 1620 1621 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1622 1623 assert(cl_idx < nvl_len); 1624 /* 1625 * We don't want to unmount & remount the dataset when changing 1626 * its canmount property. We only use the changelist logic to 1627 * unmount when setting canmount=off for a mounted filesystem 1628 * or when setting canmount=on for an unmounted filesystem. 1629 * For all other changes to canmount property the filesystem 1630 * remains the same. 1631 */ 1632 if (prop != ZFS_PROP_CANMOUNT || 1633 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1634 zfs_is_mounted(zhp, NULL)) || 1635 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_ON && 1636 !zfs_is_mounted(zhp, NULL))) { 1637 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1638 if (cls[cl_idx] == NULL) 1639 goto error; 1640 } 1641 1642 if (prop == ZFS_PROP_MOUNTPOINT && 1643 changelist_haszonedchild(cls[cl_idx])) { 1644 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1645 "child dataset with inherited mountpoint is used " 1646 "in a non-global zone")); 1647 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1648 goto error; 1649 } 1650 1651 /* We don't support those properties on FreeBSD. */ 1652 switch (prop) { 1653 case ZFS_PROP_DEVICES: 1654 case ZFS_PROP_ISCSIOPTIONS: 1655 case ZFS_PROP_XATTR: 1656 case ZFS_PROP_VSCAN: 1657 case ZFS_PROP_NBMAND: 1658 case ZFS_PROP_MLSLABEL: 1659 (void) snprintf(errbuf, sizeof (errbuf), 1660 "property '%s' not supported on FreeBSD", 1661 nvpair_name(elem)); 1662 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1663 goto error; 1664 } 1665 1666 if (cls[cl_idx] != NULL && 1667 (ret = changelist_prefix(cls[cl_idx])) != 0) 1668 goto error; 1669 1670 cl_idx++; 1671 } 1672 assert(cl_idx == nvl_len); 1673 1674 /* 1675 * Execute the corresponding ioctl() to set this list of properties. 1676 */ 1677 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1678 1679 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1680 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1681 goto error; 1682 1683 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1684 1685 if (ret != 0) { 1686 /* Get the list of unset properties back and report them. */ 1687 nvlist_t *errorprops = NULL; 1688 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1689 goto error; 1690 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1691 elem != NULL; 1692 elem = nvlist_next_nvpair(nvl, elem)) { 1693 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1694 zfs_setprop_error(hdl, prop, errno, errbuf); 1695 } 1696 nvlist_free(errorprops); 1697 1698 if (added_resv && errno == ENOSPC) { 1699 /* clean up the volsize property we tried to set */ 1700 uint64_t old_volsize = zfs_prop_get_int(zhp, 1701 ZFS_PROP_VOLSIZE); 1702 nvlist_free(nvl); 1703 nvl = NULL; 1704 zcmd_free_nvlists(&zc); 1705 1706 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1707 goto error; 1708 if (nvlist_add_uint64(nvl, 1709 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1710 old_volsize) != 0) 1711 goto error; 1712 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1713 goto error; 1714 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1715 } 1716 } else { 1717 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1718 if (cls[cl_idx] != NULL) { 1719 int clp_err = changelist_postfix(cls[cl_idx]); 1720 if (clp_err != 0) 1721 ret = clp_err; 1722 } 1723 } 1724 1725 /* 1726 * Refresh the statistics so the new property value 1727 * is reflected. 1728 */ 1729 if (ret == 0) 1730 (void) get_stats(zhp); 1731 } 1732 1733error: 1734 nvlist_free(nvl); 1735 zcmd_free_nvlists(&zc); 1736 if (cls != NULL) { 1737 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1738 if (cls[cl_idx] != NULL) 1739 changelist_free(cls[cl_idx]); 1740 } 1741 free(cls); 1742 } 1743 return (ret); 1744} 1745 1746/* 1747 * Given a property, inherit the value from the parent dataset, or if received 1748 * is TRUE, revert to the received value, if any. 1749 */ 1750int 1751zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1752{ 1753 zfs_cmd_t zc = { 0 }; 1754 int ret; 1755 prop_changelist_t *cl; 1756 libzfs_handle_t *hdl = zhp->zfs_hdl; 1757 char errbuf[1024]; 1758 zfs_prop_t prop; 1759 1760 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1761 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1762 1763 zc.zc_cookie = received; 1764 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1765 /* 1766 * For user properties, the amount of work we have to do is very 1767 * small, so just do it here. 1768 */ 1769 if (!zfs_prop_user(propname)) { 1770 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1771 "invalid property")); 1772 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1773 } 1774 1775 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1776 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1777 1778 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1779 return (zfs_standard_error(hdl, errno, errbuf)); 1780 1781 return (0); 1782 } 1783 1784 /* 1785 * Verify that this property is inheritable. 1786 */ 1787 if (zfs_prop_readonly(prop)) 1788 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1789 1790 if (!zfs_prop_inheritable(prop) && !received) 1791 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1792 1793 /* 1794 * Check to see if the value applies to this type 1795 */ 1796 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1797 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1798 1799 /* 1800 * Normalize the name, to get rid of shorthand abbreviations. 1801 */ 1802 propname = zfs_prop_to_name(prop); 1803 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1804 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1805 1806 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1807 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1808 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1809 "dataset is used in a non-global zone")); 1810 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1811 } 1812 1813 /* 1814 * Determine datasets which will be affected by this change, if any. 1815 */ 1816 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1817 return (-1); 1818 1819 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1820 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1821 "child dataset with inherited mountpoint is used " 1822 "in a non-global zone")); 1823 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1824 goto error; 1825 } 1826 1827 if ((ret = changelist_prefix(cl)) != 0) 1828 goto error; 1829 1830 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1831 return (zfs_standard_error(hdl, errno, errbuf)); 1832 } else { 1833 1834 if ((ret = changelist_postfix(cl)) != 0) 1835 goto error; 1836 1837 /* 1838 * Refresh the statistics so the new property is reflected. 1839 */ 1840 (void) get_stats(zhp); 1841 } 1842 1843error: 1844 changelist_free(cl); 1845 return (ret); 1846} 1847 1848/* 1849 * True DSL properties are stored in an nvlist. The following two functions 1850 * extract them appropriately. 1851 */ 1852static uint64_t 1853getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1854{ 1855 nvlist_t *nv; 1856 uint64_t value; 1857 1858 *source = NULL; 1859 if (nvlist_lookup_nvlist(zhp->zfs_props, 1860 zfs_prop_to_name(prop), &nv) == 0) { 1861 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1862 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1863 } else { 1864 verify(!zhp->zfs_props_table || 1865 zhp->zfs_props_table[prop] == B_TRUE); 1866 value = zfs_prop_default_numeric(prop); 1867 *source = ""; 1868 } 1869 1870 return (value); 1871} 1872 1873static const char * 1874getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1875{ 1876 nvlist_t *nv; 1877 const char *value; 1878 1879 *source = NULL; 1880 if (nvlist_lookup_nvlist(zhp->zfs_props, 1881 zfs_prop_to_name(prop), &nv) == 0) { 1882 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 1883 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1884 } else { 1885 verify(!zhp->zfs_props_table || 1886 zhp->zfs_props_table[prop] == B_TRUE); 1887 value = zfs_prop_default_string(prop); 1888 *source = ""; 1889 } 1890 1891 return (value); 1892} 1893 1894static boolean_t 1895zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1896{ 1897 return (zhp->zfs_props == zhp->zfs_recvd_props); 1898} 1899 1900static void 1901zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1902{ 1903 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1904 zhp->zfs_props = zhp->zfs_recvd_props; 1905} 1906 1907static void 1908zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1909{ 1910 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1911 *cookie = 0; 1912} 1913 1914/* 1915 * Internal function for getting a numeric property. Both zfs_prop_get() and 1916 * zfs_prop_get_int() are built using this interface. 1917 * 1918 * Certain properties can be overridden using 'mount -o'. In this case, scan 1919 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1920 * If they differ from the on-disk values, report the current values and mark 1921 * the source "temporary". 1922 */ 1923static int 1924get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1925 char **source, uint64_t *val) 1926{ 1927 zfs_cmd_t zc = { 0 }; 1928 nvlist_t *zplprops = NULL; 1929 struct mnttab mnt; 1930 char *mntopt_on = NULL; 1931 char *mntopt_off = NULL; 1932 boolean_t received = zfs_is_recvd_props_mode(zhp); 1933 1934 *source = NULL; 1935 1936 switch (prop) { 1937 case ZFS_PROP_ATIME: 1938 mntopt_on = MNTOPT_ATIME; 1939 mntopt_off = MNTOPT_NOATIME; 1940 break; 1941 1942 case ZFS_PROP_DEVICES: 1943 mntopt_on = MNTOPT_DEVICES; 1944 mntopt_off = MNTOPT_NODEVICES; 1945 break; 1946 1947 case ZFS_PROP_EXEC: 1948 mntopt_on = MNTOPT_EXEC; 1949 mntopt_off = MNTOPT_NOEXEC; 1950 break; 1951 1952 case ZFS_PROP_READONLY: 1953 mntopt_on = MNTOPT_RO; 1954 mntopt_off = MNTOPT_RW; 1955 break; 1956 1957 case ZFS_PROP_SETUID: 1958 mntopt_on = MNTOPT_SETUID; 1959 mntopt_off = MNTOPT_NOSETUID; 1960 break; 1961 1962 case ZFS_PROP_XATTR: 1963 mntopt_on = MNTOPT_XATTR; 1964 mntopt_off = MNTOPT_NOXATTR; 1965 break; 1966 1967 case ZFS_PROP_NBMAND: 1968 mntopt_on = MNTOPT_NBMAND; 1969 mntopt_off = MNTOPT_NONBMAND; 1970 break; 1971 } 1972 1973 /* 1974 * Because looking up the mount options is potentially expensive 1975 * (iterating over all of /etc/mnttab), we defer its calculation until 1976 * we're looking up a property which requires its presence. 1977 */ 1978 if (!zhp->zfs_mntcheck && 1979 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1980 libzfs_handle_t *hdl = zhp->zfs_hdl; 1981 struct mnttab entry; 1982 1983 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1984 zhp->zfs_mntopts = zfs_strdup(hdl, 1985 entry.mnt_mntopts); 1986 if (zhp->zfs_mntopts == NULL) 1987 return (-1); 1988 } 1989 1990 zhp->zfs_mntcheck = B_TRUE; 1991 } 1992 1993 if (zhp->zfs_mntopts == NULL) 1994 mnt.mnt_mntopts = ""; 1995 else 1996 mnt.mnt_mntopts = zhp->zfs_mntopts; 1997 1998 switch (prop) { 1999 case ZFS_PROP_ATIME: 2000 case ZFS_PROP_DEVICES: 2001 case ZFS_PROP_EXEC: 2002 case ZFS_PROP_READONLY: 2003 case ZFS_PROP_SETUID: 2004 case ZFS_PROP_XATTR: 2005 case ZFS_PROP_NBMAND: 2006 *val = getprop_uint64(zhp, prop, source); 2007 2008 if (received) 2009 break; 2010 2011 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2012 *val = B_TRUE; 2013 if (src) 2014 *src = ZPROP_SRC_TEMPORARY; 2015 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2016 *val = B_FALSE; 2017 if (src) 2018 *src = ZPROP_SRC_TEMPORARY; 2019 } 2020 break; 2021 2022 case ZFS_PROP_CANMOUNT: 2023 case ZFS_PROP_VOLSIZE: 2024 case ZFS_PROP_QUOTA: 2025 case ZFS_PROP_REFQUOTA: 2026 case ZFS_PROP_RESERVATION: 2027 case ZFS_PROP_REFRESERVATION: 2028 case ZFS_PROP_FILESYSTEM_LIMIT: 2029 case ZFS_PROP_SNAPSHOT_LIMIT: 2030 case ZFS_PROP_FILESYSTEM_COUNT: 2031 case ZFS_PROP_SNAPSHOT_COUNT: 2032 *val = getprop_uint64(zhp, prop, source); 2033 2034 if (*source == NULL) { 2035 /* not default, must be local */ 2036 *source = zhp->zfs_name; 2037 } 2038 break; 2039 2040 case ZFS_PROP_MOUNTED: 2041 *val = (zhp->zfs_mntopts != NULL); 2042 break; 2043 2044 case ZFS_PROP_NUMCLONES: 2045 *val = zhp->zfs_dmustats.dds_num_clones; 2046 break; 2047 2048 case ZFS_PROP_VERSION: 2049 case ZFS_PROP_NORMALIZE: 2050 case ZFS_PROP_UTF8ONLY: 2051 case ZFS_PROP_CASE: 2052 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2053 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2054 return (-1); 2055 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2056 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2057 zcmd_free_nvlists(&zc); 2058 return (-1); 2059 } 2060 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2061 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2062 val) != 0) { 2063 zcmd_free_nvlists(&zc); 2064 return (-1); 2065 } 2066 nvlist_free(zplprops); 2067 zcmd_free_nvlists(&zc); 2068 break; 2069 2070 case ZFS_PROP_INCONSISTENT: 2071 *val = zhp->zfs_dmustats.dds_inconsistent; 2072 break; 2073 2074 default: 2075 switch (zfs_prop_get_type(prop)) { 2076 case PROP_TYPE_NUMBER: 2077 case PROP_TYPE_INDEX: 2078 *val = getprop_uint64(zhp, prop, source); 2079 /* 2080 * If we tried to use a default value for a 2081 * readonly property, it means that it was not 2082 * present. 2083 */ 2084 if (zfs_prop_readonly(prop) && 2085 *source != NULL && (*source)[0] == '\0') { 2086 *source = NULL; 2087 } 2088 break; 2089 2090 case PROP_TYPE_STRING: 2091 default: 2092 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2093 "cannot get non-numeric property")); 2094 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2095 dgettext(TEXT_DOMAIN, "internal error"))); 2096 } 2097 } 2098 2099 return (0); 2100} 2101 2102/* 2103 * Calculate the source type, given the raw source string. 2104 */ 2105static void 2106get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2107 char *statbuf, size_t statlen) 2108{ 2109 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2110 return; 2111 2112 if (source == NULL) { 2113 *srctype = ZPROP_SRC_NONE; 2114 } else if (source[0] == '\0') { 2115 *srctype = ZPROP_SRC_DEFAULT; 2116 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2117 *srctype = ZPROP_SRC_RECEIVED; 2118 } else { 2119 if (strcmp(source, zhp->zfs_name) == 0) { 2120 *srctype = ZPROP_SRC_LOCAL; 2121 } else { 2122 (void) strlcpy(statbuf, source, statlen); 2123 *srctype = ZPROP_SRC_INHERITED; 2124 } 2125 } 2126 2127} 2128 2129int 2130zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2131 size_t proplen, boolean_t literal) 2132{ 2133 zfs_prop_t prop; 2134 int err = 0; 2135 2136 if (zhp->zfs_recvd_props == NULL) 2137 if (get_recvd_props_ioctl(zhp) != 0) 2138 return (-1); 2139 2140 prop = zfs_name_to_prop(propname); 2141 2142 if (prop != ZPROP_INVAL) { 2143 uint64_t cookie; 2144 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2145 return (-1); 2146 zfs_set_recvd_props_mode(zhp, &cookie); 2147 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2148 NULL, NULL, 0, literal); 2149 zfs_unset_recvd_props_mode(zhp, &cookie); 2150 } else { 2151 nvlist_t *propval; 2152 char *recvdval; 2153 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2154 propname, &propval) != 0) 2155 return (-1); 2156 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2157 &recvdval) == 0); 2158 (void) strlcpy(propbuf, recvdval, proplen); 2159 } 2160 2161 return (err == 0 ? 0 : -1); 2162} 2163 2164static int 2165get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2166{ 2167 nvlist_t *value; 2168 nvpair_t *pair; 2169 2170 value = zfs_get_clones_nvl(zhp); 2171 if (value == NULL) 2172 return (-1); 2173 2174 propbuf[0] = '\0'; 2175 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2176 pair = nvlist_next_nvpair(value, pair)) { 2177 if (propbuf[0] != '\0') 2178 (void) strlcat(propbuf, ",", proplen); 2179 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2180 } 2181 2182 return (0); 2183} 2184 2185struct get_clones_arg { 2186 uint64_t numclones; 2187 nvlist_t *value; 2188 const char *origin; 2189 char buf[ZFS_MAXNAMELEN]; 2190}; 2191 2192int 2193get_clones_cb(zfs_handle_t *zhp, void *arg) 2194{ 2195 struct get_clones_arg *gca = arg; 2196 2197 if (gca->numclones == 0) { 2198 zfs_close(zhp); 2199 return (0); 2200 } 2201 2202 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2203 NULL, NULL, 0, B_TRUE) != 0) 2204 goto out; 2205 if (strcmp(gca->buf, gca->origin) == 0) { 2206 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2207 gca->numclones--; 2208 } 2209 2210out: 2211 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2212 zfs_close(zhp); 2213 return (0); 2214} 2215 2216nvlist_t * 2217zfs_get_clones_nvl(zfs_handle_t *zhp) 2218{ 2219 nvlist_t *nv, *value; 2220 2221 if (nvlist_lookup_nvlist(zhp->zfs_props, 2222 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2223 struct get_clones_arg gca; 2224 2225 /* 2226 * if this is a snapshot, then the kernel wasn't able 2227 * to get the clones. Do it by slowly iterating. 2228 */ 2229 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2230 return (NULL); 2231 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2232 return (NULL); 2233 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2234 nvlist_free(nv); 2235 return (NULL); 2236 } 2237 2238 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2239 gca.value = value; 2240 gca.origin = zhp->zfs_name; 2241 2242 if (gca.numclones != 0) { 2243 zfs_handle_t *root; 2244 char pool[ZFS_MAXNAMELEN]; 2245 char *cp = pool; 2246 2247 /* get the pool name */ 2248 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2249 (void) strsep(&cp, "/@"); 2250 root = zfs_open(zhp->zfs_hdl, pool, 2251 ZFS_TYPE_FILESYSTEM); 2252 2253 (void) get_clones_cb(root, &gca); 2254 } 2255 2256 if (gca.numclones != 0 || 2257 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2258 nvlist_add_nvlist(zhp->zfs_props, 2259 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2260 nvlist_free(nv); 2261 nvlist_free(value); 2262 return (NULL); 2263 } 2264 nvlist_free(nv); 2265 nvlist_free(value); 2266 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2267 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2268 } 2269 2270 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2271 2272 return (value); 2273} 2274 2275/* 2276 * Retrieve a property from the given object. If 'literal' is specified, then 2277 * numbers are left as exact values. Otherwise, numbers are converted to a 2278 * human-readable form. 2279 * 2280 * Returns 0 on success, or -1 on error. 2281 */ 2282int 2283zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2284 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2285{ 2286 char *source = NULL; 2287 uint64_t val; 2288 const char *str; 2289 const char *strval; 2290 boolean_t received = zfs_is_recvd_props_mode(zhp); 2291 2292 /* 2293 * Check to see if this property applies to our object 2294 */ 2295 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2296 return (-1); 2297 2298 if (received && zfs_prop_readonly(prop)) 2299 return (-1); 2300 2301 if (src) 2302 *src = ZPROP_SRC_NONE; 2303 2304 switch (prop) { 2305 case ZFS_PROP_CREATION: 2306 /* 2307 * 'creation' is a time_t stored in the statistics. We convert 2308 * this into a string unless 'literal' is specified. 2309 */ 2310 { 2311 val = getprop_uint64(zhp, prop, &source); 2312 time_t time = (time_t)val; 2313 struct tm t; 2314 2315 if (literal || 2316 localtime_r(&time, &t) == NULL || 2317 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2318 &t) == 0) 2319 (void) snprintf(propbuf, proplen, "%llu", val); 2320 } 2321 break; 2322 2323 case ZFS_PROP_MOUNTPOINT: 2324 /* 2325 * Getting the precise mountpoint can be tricky. 2326 * 2327 * - for 'none' or 'legacy', return those values. 2328 * - for inherited mountpoints, we want to take everything 2329 * after our ancestor and append it to the inherited value. 2330 * 2331 * If the pool has an alternate root, we want to prepend that 2332 * root to any values we return. 2333 */ 2334 2335 str = getprop_string(zhp, prop, &source); 2336 2337 if (str[0] == '/') { 2338 char buf[MAXPATHLEN]; 2339 char *root = buf; 2340 const char *relpath; 2341 2342 /* 2343 * If we inherit the mountpoint, even from a dataset 2344 * with a received value, the source will be the path of 2345 * the dataset we inherit from. If source is 2346 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2347 * inherited. 2348 */ 2349 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2350 relpath = ""; 2351 } else { 2352 relpath = zhp->zfs_name + strlen(source); 2353 if (relpath[0] == '/') 2354 relpath++; 2355 } 2356 2357 if ((zpool_get_prop(zhp->zpool_hdl, 2358 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2359 B_FALSE)) || (strcmp(root, "-") == 0)) 2360 root[0] = '\0'; 2361 /* 2362 * Special case an alternate root of '/'. This will 2363 * avoid having multiple leading slashes in the 2364 * mountpoint path. 2365 */ 2366 if (strcmp(root, "/") == 0) 2367 root++; 2368 2369 /* 2370 * If the mountpoint is '/' then skip over this 2371 * if we are obtaining either an alternate root or 2372 * an inherited mountpoint. 2373 */ 2374 if (str[1] == '\0' && (root[0] != '\0' || 2375 relpath[0] != '\0')) 2376 str++; 2377 2378 if (relpath[0] == '\0') 2379 (void) snprintf(propbuf, proplen, "%s%s", 2380 root, str); 2381 else 2382 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2383 root, str, relpath[0] == '@' ? "" : "/", 2384 relpath); 2385 } else { 2386 /* 'legacy' or 'none' */ 2387 (void) strlcpy(propbuf, str, proplen); 2388 } 2389 2390 break; 2391 2392 case ZFS_PROP_ORIGIN: 2393 str = getprop_string(zhp, prop, &source); 2394 if (str == NULL) 2395 return (-1); 2396 (void) strlcpy(propbuf, str, proplen); 2397 break; 2398 2399 case ZFS_PROP_CLONES: 2400 if (get_clones_string(zhp, propbuf, proplen) != 0) 2401 return (-1); 2402 break; 2403 2404 case ZFS_PROP_QUOTA: 2405 case ZFS_PROP_REFQUOTA: 2406 case ZFS_PROP_RESERVATION: 2407 case ZFS_PROP_REFRESERVATION: 2408 2409 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2410 return (-1); 2411 2412 /* 2413 * If quota or reservation is 0, we translate this into 'none' 2414 * (unless literal is set), and indicate that it's the default 2415 * value. Otherwise, we print the number nicely and indicate 2416 * that its set locally. 2417 */ 2418 if (val == 0) { 2419 if (literal) 2420 (void) strlcpy(propbuf, "0", proplen); 2421 else 2422 (void) strlcpy(propbuf, "none", proplen); 2423 } else { 2424 if (literal) 2425 (void) snprintf(propbuf, proplen, "%llu", 2426 (u_longlong_t)val); 2427 else 2428 zfs_nicenum(val, propbuf, proplen); 2429 } 2430 break; 2431 2432 case ZFS_PROP_FILESYSTEM_LIMIT: 2433 case ZFS_PROP_SNAPSHOT_LIMIT: 2434 case ZFS_PROP_FILESYSTEM_COUNT: 2435 case ZFS_PROP_SNAPSHOT_COUNT: 2436 2437 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2438 return (-1); 2439 2440 /* 2441 * If limit is UINT64_MAX, we translate this into 'none' (unless 2442 * literal is set), and indicate that it's the default value. 2443 * Otherwise, we print the number nicely and indicate that it's 2444 * set locally. 2445 */ 2446 if (literal) { 2447 (void) snprintf(propbuf, proplen, "%llu", 2448 (u_longlong_t)val); 2449 } else if (val == UINT64_MAX) { 2450 (void) strlcpy(propbuf, "none", proplen); 2451 } else { 2452 zfs_nicenum(val, propbuf, proplen); 2453 } 2454 break; 2455 2456 case ZFS_PROP_REFRATIO: 2457 case ZFS_PROP_COMPRESSRATIO: 2458 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2459 return (-1); 2460 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2461 (u_longlong_t)(val / 100), 2462 (u_longlong_t)(val % 100)); 2463 break; 2464 2465 case ZFS_PROP_TYPE: 2466 switch (zhp->zfs_type) { 2467 case ZFS_TYPE_FILESYSTEM: 2468 str = "filesystem"; 2469 break; 2470 case ZFS_TYPE_VOLUME: 2471 str = "volume"; 2472 break; 2473 case ZFS_TYPE_SNAPSHOT: 2474 str = "snapshot"; 2475 break; 2476 case ZFS_TYPE_BOOKMARK: 2477 str = "bookmark"; 2478 break; 2479 default: 2480 abort(); 2481 } 2482 (void) snprintf(propbuf, proplen, "%s", str); 2483 break; 2484 2485 case ZFS_PROP_MOUNTED: 2486 /* 2487 * The 'mounted' property is a pseudo-property that described 2488 * whether the filesystem is currently mounted. Even though 2489 * it's a boolean value, the typical values of "on" and "off" 2490 * don't make sense, so we translate to "yes" and "no". 2491 */ 2492 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2493 src, &source, &val) != 0) 2494 return (-1); 2495 if (val) 2496 (void) strlcpy(propbuf, "yes", proplen); 2497 else 2498 (void) strlcpy(propbuf, "no", proplen); 2499 break; 2500 2501 case ZFS_PROP_NAME: 2502 /* 2503 * The 'name' property is a pseudo-property derived from the 2504 * dataset name. It is presented as a real property to simplify 2505 * consumers. 2506 */ 2507 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2508 break; 2509 2510 case ZFS_PROP_MLSLABEL: 2511 { 2512#ifdef illumos 2513 m_label_t *new_sl = NULL; 2514 char *ascii = NULL; /* human readable label */ 2515 2516 (void) strlcpy(propbuf, 2517 getprop_string(zhp, prop, &source), proplen); 2518 2519 if (literal || (strcasecmp(propbuf, 2520 ZFS_MLSLABEL_DEFAULT) == 0)) 2521 break; 2522 2523 /* 2524 * Try to translate the internal hex string to 2525 * human-readable output. If there are any 2526 * problems just use the hex string. 2527 */ 2528 2529 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2530 L_NO_CORRECTION, NULL) == -1) { 2531 m_label_free(new_sl); 2532 break; 2533 } 2534 2535 if (label_to_str(new_sl, &ascii, M_LABEL, 2536 DEF_NAMES) != 0) { 2537 if (ascii) 2538 free(ascii); 2539 m_label_free(new_sl); 2540 break; 2541 } 2542 m_label_free(new_sl); 2543 2544 (void) strlcpy(propbuf, ascii, proplen); 2545 free(ascii); 2546#else /* !illumos */ 2547 propbuf[0] = '\0'; 2548#endif /* illumos */ 2549 } 2550 break; 2551 2552 case ZFS_PROP_GUID: 2553 /* 2554 * GUIDs are stored as numbers, but they are identifiers. 2555 * We don't want them to be pretty printed, because pretty 2556 * printing mangles the ID into a truncated and useless value. 2557 */ 2558 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2559 return (-1); 2560 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2561 break; 2562 2563 default: 2564 switch (zfs_prop_get_type(prop)) { 2565 case PROP_TYPE_NUMBER: 2566 if (get_numeric_property(zhp, prop, src, 2567 &source, &val) != 0) 2568 return (-1); 2569 if (literal) 2570 (void) snprintf(propbuf, proplen, "%llu", 2571 (u_longlong_t)val); 2572 else 2573 zfs_nicenum(val, propbuf, proplen); 2574 break; 2575 2576 case PROP_TYPE_STRING: 2577 str = getprop_string(zhp, prop, &source); 2578 if (str == NULL) 2579 return (-1); 2580 (void) strlcpy(propbuf, str, proplen); 2581 break; 2582 2583 case PROP_TYPE_INDEX: 2584 if (get_numeric_property(zhp, prop, src, 2585 &source, &val) != 0) 2586 return (-1); 2587 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2588 return (-1); 2589 (void) strlcpy(propbuf, strval, proplen); 2590 break; 2591 2592 default: 2593 abort(); 2594 } 2595 } 2596 2597 get_source(zhp, src, source, statbuf, statlen); 2598 2599 return (0); 2600} 2601 2602/* 2603 * Utility function to get the given numeric property. Does no validation that 2604 * the given property is the appropriate type; should only be used with 2605 * hard-coded property types. 2606 */ 2607uint64_t 2608zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2609{ 2610 char *source; 2611 uint64_t val; 2612 2613 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2614 2615 return (val); 2616} 2617 2618int 2619zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2620{ 2621 char buf[64]; 2622 2623 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2624 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2625} 2626 2627/* 2628 * Similar to zfs_prop_get(), but returns the value as an integer. 2629 */ 2630int 2631zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2632 zprop_source_t *src, char *statbuf, size_t statlen) 2633{ 2634 char *source; 2635 2636 /* 2637 * Check to see if this property applies to our object 2638 */ 2639 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2640 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2641 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2642 zfs_prop_to_name(prop))); 2643 } 2644 2645 if (src) 2646 *src = ZPROP_SRC_NONE; 2647 2648 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2649 return (-1); 2650 2651 get_source(zhp, src, source, statbuf, statlen); 2652 2653 return (0); 2654} 2655 2656static int 2657idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2658 char **domainp, idmap_rid_t *ridp) 2659{ 2660#ifdef illumos 2661 idmap_get_handle_t *get_hdl = NULL; 2662 idmap_stat status; 2663 int err = EINVAL; 2664 2665 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2666 goto out; 2667 2668 if (isuser) { 2669 err = idmap_get_sidbyuid(get_hdl, id, 2670 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2671 } else { 2672 err = idmap_get_sidbygid(get_hdl, id, 2673 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2674 } 2675 if (err == IDMAP_SUCCESS && 2676 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2677 status == IDMAP_SUCCESS) 2678 err = 0; 2679 else 2680 err = EINVAL; 2681out: 2682 if (get_hdl) 2683 idmap_get_destroy(get_hdl); 2684 return (err); 2685#else /* !illumos */ 2686 assert(!"invalid code path"); 2687 return (EINVAL); // silence compiler warning 2688#endif /* illumos */ 2689} 2690 2691/* 2692 * convert the propname into parameters needed by kernel 2693 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2694 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2695 */ 2696static int 2697userquota_propname_decode(const char *propname, boolean_t zoned, 2698 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2699{ 2700 zfs_userquota_prop_t type; 2701 char *cp, *end; 2702 char *numericsid = NULL; 2703 boolean_t isuser; 2704 2705 domain[0] = '\0'; 2706 *ridp = 0; 2707 /* Figure out the property type ({user|group}{quota|space}) */ 2708 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2709 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2710 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2711 break; 2712 } 2713 if (type == ZFS_NUM_USERQUOTA_PROPS) 2714 return (EINVAL); 2715 *typep = type; 2716 2717 isuser = (type == ZFS_PROP_USERQUOTA || 2718 type == ZFS_PROP_USERUSED); 2719 2720 cp = strchr(propname, '@') + 1; 2721 2722 if (strchr(cp, '@')) { 2723#ifdef illumos 2724 /* 2725 * It's a SID name (eg "user@domain") that needs to be 2726 * turned into S-1-domainID-RID. 2727 */ 2728 int flag = 0; 2729 idmap_stat stat, map_stat; 2730 uid_t pid; 2731 idmap_rid_t rid; 2732 idmap_get_handle_t *gh = NULL; 2733 2734 stat = idmap_get_create(&gh); 2735 if (stat != IDMAP_SUCCESS) { 2736 idmap_get_destroy(gh); 2737 return (ENOMEM); 2738 } 2739 if (zoned && getzoneid() == GLOBAL_ZONEID) 2740 return (ENOENT); 2741 if (isuser) { 2742 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2743 if (stat < 0) 2744 return (ENOENT); 2745 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2746 &rid, &map_stat); 2747 } else { 2748 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2749 if (stat < 0) 2750 return (ENOENT); 2751 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2752 &rid, &map_stat); 2753 } 2754 if (stat < 0) { 2755 idmap_get_destroy(gh); 2756 return (ENOENT); 2757 } 2758 stat = idmap_get_mappings(gh); 2759 idmap_get_destroy(gh); 2760 2761 if (stat < 0) { 2762 return (ENOENT); 2763 } 2764 if (numericsid == NULL) 2765 return (ENOENT); 2766 cp = numericsid; 2767 *ridp = rid; 2768 /* will be further decoded below */ 2769#else /* !illumos */ 2770 return (ENOENT); 2771#endif /* illumos */ 2772 } 2773 2774 if (strncmp(cp, "S-1-", 4) == 0) { 2775 /* It's a numeric SID (eg "S-1-234-567-89") */ 2776 (void) strlcpy(domain, cp, domainlen); 2777 errno = 0; 2778 if (*ridp == 0) { 2779 cp = strrchr(domain, '-'); 2780 *cp = '\0'; 2781 cp++; 2782 *ridp = strtoull(cp, &end, 10); 2783 } else { 2784 end = ""; 2785 } 2786 if (numericsid) { 2787 free(numericsid); 2788 numericsid = NULL; 2789 } 2790 if (errno != 0 || *end != '\0') 2791 return (EINVAL); 2792 } else if (!isdigit(*cp)) { 2793 /* 2794 * It's a user/group name (eg "user") that needs to be 2795 * turned into a uid/gid 2796 */ 2797 if (zoned && getzoneid() == GLOBAL_ZONEID) 2798 return (ENOENT); 2799 if (isuser) { 2800 struct passwd *pw; 2801 pw = getpwnam(cp); 2802 if (pw == NULL) 2803 return (ENOENT); 2804 *ridp = pw->pw_uid; 2805 } else { 2806 struct group *gr; 2807 gr = getgrnam(cp); 2808 if (gr == NULL) 2809 return (ENOENT); 2810 *ridp = gr->gr_gid; 2811 } 2812 } else { 2813 /* It's a user/group ID (eg "12345"). */ 2814 uid_t id = strtoul(cp, &end, 10); 2815 idmap_rid_t rid; 2816 char *mapdomain; 2817 2818 if (*end != '\0') 2819 return (EINVAL); 2820 if (id > MAXUID) { 2821 /* It's an ephemeral ID. */ 2822 if (idmap_id_to_numeric_domain_rid(id, isuser, 2823 &mapdomain, &rid) != 0) 2824 return (ENOENT); 2825 (void) strlcpy(domain, mapdomain, domainlen); 2826 *ridp = rid; 2827 } else { 2828 *ridp = id; 2829 } 2830 } 2831 2832 ASSERT3P(numericsid, ==, NULL); 2833 return (0); 2834} 2835 2836static int 2837zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2838 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2839{ 2840 int err; 2841 zfs_cmd_t zc = { 0 }; 2842 2843 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2844 2845 err = userquota_propname_decode(propname, 2846 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2847 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2848 zc.zc_objset_type = *typep; 2849 if (err) 2850 return (err); 2851 2852 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2853 if (err) 2854 return (err); 2855 2856 *propvalue = zc.zc_cookie; 2857 return (0); 2858} 2859 2860int 2861zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2862 uint64_t *propvalue) 2863{ 2864 zfs_userquota_prop_t type; 2865 2866 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2867 &type)); 2868} 2869 2870int 2871zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2872 char *propbuf, int proplen, boolean_t literal) 2873{ 2874 int err; 2875 uint64_t propvalue; 2876 zfs_userquota_prop_t type; 2877 2878 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2879 &type); 2880 2881 if (err) 2882 return (err); 2883 2884 if (literal) { 2885 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2886 } else if (propvalue == 0 && 2887 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2888 (void) strlcpy(propbuf, "none", proplen); 2889 } else { 2890 zfs_nicenum(propvalue, propbuf, proplen); 2891 } 2892 return (0); 2893} 2894 2895int 2896zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2897 uint64_t *propvalue) 2898{ 2899 int err; 2900 zfs_cmd_t zc = { 0 }; 2901 const char *snapname; 2902 2903 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2904 2905 snapname = strchr(propname, '@') + 1; 2906 if (strchr(snapname, '@')) { 2907 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2908 } else { 2909 /* snapname is the short name, append it to zhp's fsname */ 2910 char *cp; 2911 2912 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2913 sizeof (zc.zc_value)); 2914 cp = strchr(zc.zc_value, '@'); 2915 if (cp != NULL) 2916 *cp = '\0'; 2917 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2918 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2919 } 2920 2921 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2922 if (err) 2923 return (err); 2924 2925 *propvalue = zc.zc_cookie; 2926 return (0); 2927} 2928 2929int 2930zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2931 char *propbuf, int proplen, boolean_t literal) 2932{ 2933 int err; 2934 uint64_t propvalue; 2935 2936 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2937 2938 if (err) 2939 return (err); 2940 2941 if (literal) { 2942 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2943 } else { 2944 zfs_nicenum(propvalue, propbuf, proplen); 2945 } 2946 return (0); 2947} 2948 2949/* 2950 * Returns the name of the given zfs handle. 2951 */ 2952const char * 2953zfs_get_name(const zfs_handle_t *zhp) 2954{ 2955 return (zhp->zfs_name); 2956} 2957 2958/* 2959 * Returns the type of the given zfs handle. 2960 */ 2961zfs_type_t 2962zfs_get_type(const zfs_handle_t *zhp) 2963{ 2964 return (zhp->zfs_type); 2965} 2966 2967/* 2968 * Is one dataset name a child dataset of another? 2969 * 2970 * Needs to handle these cases: 2971 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2972 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2973 * Descendant? No. No. No. Yes. 2974 */ 2975static boolean_t 2976is_descendant(const char *ds1, const char *ds2) 2977{ 2978 size_t d1len = strlen(ds1); 2979 2980 /* ds2 can't be a descendant if it's smaller */ 2981 if (strlen(ds2) < d1len) 2982 return (B_FALSE); 2983 2984 /* otherwise, compare strings and verify that there's a '/' char */ 2985 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2986} 2987 2988/* 2989 * Given a complete name, return just the portion that refers to the parent. 2990 * Will return -1 if there is no parent (path is just the name of the 2991 * pool). 2992 */ 2993static int 2994parent_name(const char *path, char *buf, size_t buflen) 2995{ 2996 char *slashp; 2997 2998 (void) strlcpy(buf, path, buflen); 2999 3000 if ((slashp = strrchr(buf, '/')) == NULL) 3001 return (-1); 3002 *slashp = '\0'; 3003 3004 return (0); 3005} 3006 3007/* 3008 * If accept_ancestor is false, then check to make sure that the given path has 3009 * a parent, and that it exists. If accept_ancestor is true, then find the 3010 * closest existing ancestor for the given path. In prefixlen return the 3011 * length of already existing prefix of the given path. We also fetch the 3012 * 'zoned' property, which is used to validate property settings when creating 3013 * new datasets. 3014 */ 3015static int 3016check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3017 boolean_t accept_ancestor, int *prefixlen) 3018{ 3019 zfs_cmd_t zc = { 0 }; 3020 char parent[ZFS_MAXNAMELEN]; 3021 char *slash; 3022 zfs_handle_t *zhp; 3023 char errbuf[1024]; 3024 uint64_t is_zoned; 3025 3026 (void) snprintf(errbuf, sizeof (errbuf), 3027 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3028 3029 /* get parent, and check to see if this is just a pool */ 3030 if (parent_name(path, parent, sizeof (parent)) != 0) { 3031 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3032 "missing dataset name")); 3033 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3034 } 3035 3036 /* check to see if the pool exists */ 3037 if ((slash = strchr(parent, '/')) == NULL) 3038 slash = parent + strlen(parent); 3039 (void) strncpy(zc.zc_name, parent, slash - parent); 3040 zc.zc_name[slash - parent] = '\0'; 3041 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3042 errno == ENOENT) { 3043 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3044 "no such pool '%s'"), zc.zc_name); 3045 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3046 } 3047 3048 /* check to see if the parent dataset exists */ 3049 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3050 if (errno == ENOENT && accept_ancestor) { 3051 /* 3052 * Go deeper to find an ancestor, give up on top level. 3053 */ 3054 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3055 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3056 "no such pool '%s'"), zc.zc_name); 3057 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3058 } 3059 } else if (errno == ENOENT) { 3060 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3061 "parent does not exist")); 3062 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3063 } else 3064 return (zfs_standard_error(hdl, errno, errbuf)); 3065 } 3066 3067 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3068 if (zoned != NULL) 3069 *zoned = is_zoned; 3070 3071 /* we are in a non-global zone, but parent is in the global zone */ 3072 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3073 (void) zfs_standard_error(hdl, EPERM, errbuf); 3074 zfs_close(zhp); 3075 return (-1); 3076 } 3077 3078 /* make sure parent is a filesystem */ 3079 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3080 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3081 "parent is not a filesystem")); 3082 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3083 zfs_close(zhp); 3084 return (-1); 3085 } 3086 3087 zfs_close(zhp); 3088 if (prefixlen != NULL) 3089 *prefixlen = strlen(parent); 3090 return (0); 3091} 3092 3093/* 3094 * Finds whether the dataset of the given type(s) exists. 3095 */ 3096boolean_t 3097zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3098{ 3099 zfs_handle_t *zhp; 3100 3101 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3102 return (B_FALSE); 3103 3104 /* 3105 * Try to get stats for the dataset, which will tell us if it exists. 3106 */ 3107 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3108 int ds_type = zhp->zfs_type; 3109 3110 zfs_close(zhp); 3111 if (types & ds_type) 3112 return (B_TRUE); 3113 } 3114 return (B_FALSE); 3115} 3116 3117/* 3118 * Given a path to 'target', create all the ancestors between 3119 * the prefixlen portion of the path, and the target itself. 3120 * Fail if the initial prefixlen-ancestor does not already exist. 3121 */ 3122int 3123create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3124{ 3125 zfs_handle_t *h; 3126 char *cp; 3127 const char *opname; 3128 3129 /* make sure prefix exists */ 3130 cp = target + prefixlen; 3131 if (*cp != '/') { 3132 assert(strchr(cp, '/') == NULL); 3133 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3134 } else { 3135 *cp = '\0'; 3136 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3137 *cp = '/'; 3138 } 3139 if (h == NULL) 3140 return (-1); 3141 zfs_close(h); 3142 3143 /* 3144 * Attempt to create, mount, and share any ancestor filesystems, 3145 * up to the prefixlen-long one. 3146 */ 3147 for (cp = target + prefixlen + 1; 3148 cp = strchr(cp, '/'); *cp = '/', cp++) { 3149 3150 *cp = '\0'; 3151 3152 h = make_dataset_handle(hdl, target); 3153 if (h) { 3154 /* it already exists, nothing to do here */ 3155 zfs_close(h); 3156 continue; 3157 } 3158 3159 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3160 NULL) != 0) { 3161 opname = dgettext(TEXT_DOMAIN, "create"); 3162 goto ancestorerr; 3163 } 3164 3165 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3166 if (h == NULL) { 3167 opname = dgettext(TEXT_DOMAIN, "open"); 3168 goto ancestorerr; 3169 } 3170 3171 if (zfs_mount(h, NULL, 0) != 0) { 3172 opname = dgettext(TEXT_DOMAIN, "mount"); 3173 goto ancestorerr; 3174 } 3175 3176 if (zfs_share(h) != 0) { 3177 opname = dgettext(TEXT_DOMAIN, "share"); 3178 goto ancestorerr; 3179 } 3180 3181 zfs_close(h); 3182 } 3183 3184 return (0); 3185 3186ancestorerr: 3187 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3188 "failed to %s ancestor '%s'"), opname, target); 3189 return (-1); 3190} 3191 3192/* 3193 * Creates non-existing ancestors of the given path. 3194 */ 3195int 3196zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3197{ 3198 int prefix; 3199 char *path_copy; 3200 int rc; 3201 3202 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3203 return (-1); 3204 3205 if ((path_copy = strdup(path)) != NULL) { 3206 rc = create_parents(hdl, path_copy, prefix); 3207 free(path_copy); 3208 } 3209 if (path_copy == NULL || rc != 0) 3210 return (-1); 3211 3212 return (0); 3213} 3214 3215/* 3216 * Create a new filesystem or volume. 3217 */ 3218int 3219zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3220 nvlist_t *props) 3221{ 3222 int ret; 3223 uint64_t size = 0; 3224 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3225 char errbuf[1024]; 3226 uint64_t zoned; 3227 enum lzc_dataset_type ost; 3228 3229 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3230 "cannot create '%s'"), path); 3231 3232 /* validate the path, taking care to note the extended error message */ 3233 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3234 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3235 3236 /* validate parents exist */ 3237 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3238 return (-1); 3239 3240 /* 3241 * The failure modes when creating a dataset of a different type over 3242 * one that already exists is a little strange. In particular, if you 3243 * try to create a dataset on top of an existing dataset, the ioctl() 3244 * will return ENOENT, not EEXIST. To prevent this from happening, we 3245 * first try to see if the dataset exists. 3246 */ 3247 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3248 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3249 "dataset already exists")); 3250 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3251 } 3252 3253 if (type == ZFS_TYPE_VOLUME) 3254 ost = LZC_DATSET_TYPE_ZVOL; 3255 else 3256 ost = LZC_DATSET_TYPE_ZFS; 3257 3258 /* open zpool handle for prop validation */ 3259 char pool_path[MAXNAMELEN]; 3260 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3261 3262 /* truncate pool_path at first slash */ 3263 char *p = strchr(pool_path, '/'); 3264 if (p != NULL) 3265 *p = '\0'; 3266 3267 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path); 3268 3269 if (props && (props = zfs_valid_proplist(hdl, type, props, 3270 zoned, NULL, zpool_handle, errbuf)) == 0) { 3271 zpool_close(zpool_handle); 3272 return (-1); 3273 } 3274 zpool_close(zpool_handle); 3275 3276 if (type == ZFS_TYPE_VOLUME) { 3277 /* 3278 * If we are creating a volume, the size and block size must 3279 * satisfy a few restraints. First, the blocksize must be a 3280 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3281 * volsize must be a multiple of the block size, and cannot be 3282 * zero. 3283 */ 3284 if (props == NULL || nvlist_lookup_uint64(props, 3285 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3286 nvlist_free(props); 3287 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3288 "missing volume size")); 3289 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3290 } 3291 3292 if ((ret = nvlist_lookup_uint64(props, 3293 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3294 &blocksize)) != 0) { 3295 if (ret == ENOENT) { 3296 blocksize = zfs_prop_default_numeric( 3297 ZFS_PROP_VOLBLOCKSIZE); 3298 } else { 3299 nvlist_free(props); 3300 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3301 "missing volume block size")); 3302 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3303 } 3304 } 3305 3306 if (size == 0) { 3307 nvlist_free(props); 3308 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3309 "volume size cannot be zero")); 3310 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3311 } 3312 3313 if (size % blocksize != 0) { 3314 nvlist_free(props); 3315 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3316 "volume size must be a multiple of volume block " 3317 "size")); 3318 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3319 } 3320 } 3321 3322 /* create the dataset */ 3323 ret = lzc_create(path, ost, props); 3324 nvlist_free(props); 3325 3326 /* check for failure */ 3327 if (ret != 0) { 3328 char parent[ZFS_MAXNAMELEN]; 3329 (void) parent_name(path, parent, sizeof (parent)); 3330 3331 switch (errno) { 3332 case ENOENT: 3333 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3334 "no such parent '%s'"), parent); 3335 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3336 3337 case EINVAL: 3338 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3339 "parent '%s' is not a filesystem"), parent); 3340 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3341 3342 case ENOTSUP: 3343 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3344 "pool must be upgraded to set this " 3345 "property or value")); 3346 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3347#ifdef _ILP32 3348 case EOVERFLOW: 3349 /* 3350 * This platform can't address a volume this big. 3351 */ 3352 if (type == ZFS_TYPE_VOLUME) 3353 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3354 errbuf)); 3355#endif 3356 /* FALLTHROUGH */ 3357 default: 3358 return (zfs_standard_error(hdl, errno, errbuf)); 3359 } 3360 } 3361 3362 return (0); 3363} 3364 3365/* 3366 * Destroys the given dataset. The caller must make sure that the filesystem 3367 * isn't mounted, and that there are no active dependents. If the file system 3368 * does not exist this function does nothing. 3369 */ 3370int 3371zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3372{ 3373 zfs_cmd_t zc = { 0 }; 3374 3375 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3376 nvlist_t *nv = fnvlist_alloc(); 3377 fnvlist_add_boolean(nv, zhp->zfs_name); 3378 int error = lzc_destroy_bookmarks(nv, NULL); 3379 fnvlist_free(nv); 3380 if (error != 0) { 3381 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3382 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3383 zhp->zfs_name)); 3384 } 3385 return (0); 3386 } 3387 3388 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3389 3390 if (ZFS_IS_VOLUME(zhp)) { 3391 zc.zc_objset_type = DMU_OST_ZVOL; 3392 } else { 3393 zc.zc_objset_type = DMU_OST_ZFS; 3394 } 3395 3396 zc.zc_defer_destroy = defer; 3397 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3398 errno != ENOENT) { 3399 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3400 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3401 zhp->zfs_name)); 3402 } 3403 3404 remove_mountpoint(zhp); 3405 3406 return (0); 3407} 3408 3409struct destroydata { 3410 nvlist_t *nvl; 3411 const char *snapname; 3412}; 3413 3414static int 3415zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3416{ 3417 struct destroydata *dd = arg; 3418 char name[ZFS_MAXNAMELEN]; 3419 int rv = 0; 3420 3421 (void) snprintf(name, sizeof (name), 3422 "%s@%s", zhp->zfs_name, dd->snapname); 3423 3424 if (lzc_exists(name)) 3425 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3426 3427 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3428 zfs_close(zhp); 3429 return (rv); 3430} 3431 3432/* 3433 * Destroys all snapshots with the given name in zhp & descendants. 3434 */ 3435int 3436zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3437{ 3438 int ret; 3439 struct destroydata dd = { 0 }; 3440 3441 dd.snapname = snapname; 3442 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3443 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3444 3445 if (nvlist_empty(dd.nvl)) { 3446 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3447 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3448 zhp->zfs_name, snapname); 3449 } else { 3450 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3451 } 3452 nvlist_free(dd.nvl); 3453 return (ret); 3454} 3455 3456/* 3457 * Destroys all the snapshots named in the nvlist. 3458 */ 3459int 3460zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3461{ 3462 int ret; 3463 nvlist_t *errlist; 3464 3465 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3466 3467 if (ret == 0) 3468 return (0); 3469 3470 if (nvlist_empty(errlist)) { 3471 char errbuf[1024]; 3472 (void) snprintf(errbuf, sizeof (errbuf), 3473 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3474 3475 ret = zfs_standard_error(hdl, ret, errbuf); 3476 } 3477 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3478 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3479 char errbuf[1024]; 3480 (void) snprintf(errbuf, sizeof (errbuf), 3481 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3482 nvpair_name(pair)); 3483 3484 switch (fnvpair_value_int32(pair)) { 3485 case EEXIST: 3486 zfs_error_aux(hdl, 3487 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3488 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3489 break; 3490 default: 3491 ret = zfs_standard_error(hdl, errno, errbuf); 3492 break; 3493 } 3494 } 3495 3496 return (ret); 3497} 3498 3499/* 3500 * Clones the given dataset. The target must be of the same type as the source. 3501 */ 3502int 3503zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3504{ 3505 char parent[ZFS_MAXNAMELEN]; 3506 int ret; 3507 char errbuf[1024]; 3508 libzfs_handle_t *hdl = zhp->zfs_hdl; 3509 uint64_t zoned; 3510 3511 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3512 3513 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3514 "cannot create '%s'"), target); 3515 3516 /* validate the target/clone name */ 3517 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3518 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3519 3520 /* validate parents exist */ 3521 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3522 return (-1); 3523 3524 (void) parent_name(target, parent, sizeof (parent)); 3525 3526 /* do the clone */ 3527 3528 if (props) { 3529 zfs_type_t type; 3530 if (ZFS_IS_VOLUME(zhp)) { 3531 type = ZFS_TYPE_VOLUME; 3532 } else { 3533 type = ZFS_TYPE_FILESYSTEM; 3534 } 3535 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3536 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3537 return (-1); 3538 } 3539 3540 ret = lzc_clone(target, zhp->zfs_name, props); 3541 nvlist_free(props); 3542 3543 if (ret != 0) { 3544 switch (errno) { 3545 3546 case ENOENT: 3547 /* 3548 * The parent doesn't exist. We should have caught this 3549 * above, but there may a race condition that has since 3550 * destroyed the parent. 3551 * 3552 * At this point, we don't know whether it's the source 3553 * that doesn't exist anymore, or whether the target 3554 * dataset doesn't exist. 3555 */ 3556 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3557 "no such parent '%s'"), parent); 3558 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3559 3560 case EXDEV: 3561 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3562 "source and target pools differ")); 3563 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3564 errbuf)); 3565 3566 default: 3567 return (zfs_standard_error(zhp->zfs_hdl, errno, 3568 errbuf)); 3569 } 3570 } 3571 3572 return (ret); 3573} 3574 3575/* 3576 * Promotes the given clone fs to be the clone parent. 3577 */ 3578int 3579zfs_promote(zfs_handle_t *zhp) 3580{ 3581 libzfs_handle_t *hdl = zhp->zfs_hdl; 3582 zfs_cmd_t zc = { 0 }; 3583 char parent[MAXPATHLEN]; 3584 int ret; 3585 char errbuf[1024]; 3586 3587 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3588 "cannot promote '%s'"), zhp->zfs_name); 3589 3590 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3591 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3592 "snapshots can not be promoted")); 3593 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3594 } 3595 3596 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3597 if (parent[0] == '\0') { 3598 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3599 "not a cloned filesystem")); 3600 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3601 } 3602 3603 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3604 sizeof (zc.zc_value)); 3605 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3606 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3607 3608 if (ret != 0) { 3609 int save_errno = errno; 3610 3611 switch (save_errno) { 3612 case EEXIST: 3613 /* There is a conflicting snapshot name. */ 3614 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3615 "conflicting snapshot '%s' from parent '%s'"), 3616 zc.zc_string, parent); 3617 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3618 3619 default: 3620 return (zfs_standard_error(hdl, save_errno, errbuf)); 3621 } 3622 } 3623 return (ret); 3624} 3625 3626typedef struct snapdata { 3627 nvlist_t *sd_nvl; 3628 const char *sd_snapname; 3629} snapdata_t; 3630 3631static int 3632zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3633{ 3634 snapdata_t *sd = arg; 3635 char name[ZFS_MAXNAMELEN]; 3636 int rv = 0; 3637 3638 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3639 (void) snprintf(name, sizeof (name), 3640 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3641 3642 fnvlist_add_boolean(sd->sd_nvl, name); 3643 3644 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3645 } 3646 zfs_close(zhp); 3647 3648 return (rv); 3649} 3650 3651/* 3652 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3653 * created. 3654 */ 3655int 3656zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3657{ 3658 int ret; 3659 char errbuf[1024]; 3660 nvpair_t *elem; 3661 nvlist_t *errors; 3662 3663 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3664 "cannot create snapshots ")); 3665 3666 elem = NULL; 3667 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3668 const char *snapname = nvpair_name(elem); 3669 3670 /* validate the target name */ 3671 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3672 B_TRUE)) { 3673 (void) snprintf(errbuf, sizeof (errbuf), 3674 dgettext(TEXT_DOMAIN, 3675 "cannot create snapshot '%s'"), snapname); 3676 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3677 } 3678 } 3679 3680 /* 3681 * get pool handle for prop validation. assumes all snaps are in the 3682 * same pool, as does lzc_snapshot (below). 3683 */ 3684 char pool[MAXNAMELEN]; 3685 elem = nvlist_next_nvpair(snaps, NULL); 3686 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3687 pool[strcspn(pool, "/@")] = '\0'; 3688 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3689 3690 if (props != NULL && 3691 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3692 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3693 zpool_close(zpool_hdl); 3694 return (-1); 3695 } 3696 zpool_close(zpool_hdl); 3697 3698 ret = lzc_snapshot(snaps, props, &errors); 3699 3700 if (ret != 0) { 3701 boolean_t printed = B_FALSE; 3702 for (elem = nvlist_next_nvpair(errors, NULL); 3703 elem != NULL; 3704 elem = nvlist_next_nvpair(errors, elem)) { 3705 (void) snprintf(errbuf, sizeof (errbuf), 3706 dgettext(TEXT_DOMAIN, 3707 "cannot create snapshot '%s'"), nvpair_name(elem)); 3708 (void) zfs_standard_error(hdl, 3709 fnvpair_value_int32(elem), errbuf); 3710 printed = B_TRUE; 3711 } 3712 if (!printed) { 3713 switch (ret) { 3714 case EXDEV: 3715 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3716 "multiple snapshots of same " 3717 "fs not allowed")); 3718 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3719 3720 break; 3721 default: 3722 (void) zfs_standard_error(hdl, ret, errbuf); 3723 } 3724 } 3725 } 3726 3727 nvlist_free(props); 3728 nvlist_free(errors); 3729 return (ret); 3730} 3731 3732int 3733zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3734 nvlist_t *props) 3735{ 3736 int ret; 3737 snapdata_t sd = { 0 }; 3738 char fsname[ZFS_MAXNAMELEN]; 3739 char *cp; 3740 zfs_handle_t *zhp; 3741 char errbuf[1024]; 3742 3743 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3744 "cannot snapshot %s"), path); 3745 3746 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3747 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3748 3749 (void) strlcpy(fsname, path, sizeof (fsname)); 3750 cp = strchr(fsname, '@'); 3751 *cp = '\0'; 3752 sd.sd_snapname = cp + 1; 3753 3754 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3755 ZFS_TYPE_VOLUME)) == NULL) { 3756 return (-1); 3757 } 3758 3759 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3760 if (recursive) { 3761 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3762 } else { 3763 fnvlist_add_boolean(sd.sd_nvl, path); 3764 } 3765 3766 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3767 nvlist_free(sd.sd_nvl); 3768 zfs_close(zhp); 3769 return (ret); 3770} 3771 3772/* 3773 * Destroy any more recent snapshots. We invoke this callback on any dependents 3774 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3775 * is a dependent and we should just destroy it without checking the transaction 3776 * group. 3777 */ 3778typedef struct rollback_data { 3779 const char *cb_target; /* the snapshot */ 3780 uint64_t cb_create; /* creation time reference */ 3781 boolean_t cb_error; 3782 boolean_t cb_force; 3783} rollback_data_t; 3784 3785static int 3786rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3787{ 3788 rollback_data_t *cbp = data; 3789 prop_changelist_t *clp; 3790 3791 /* We must destroy this clone; first unmount it */ 3792 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3793 cbp->cb_force ? MS_FORCE: 0); 3794 if (clp == NULL || changelist_prefix(clp) != 0) { 3795 cbp->cb_error = B_TRUE; 3796 zfs_close(zhp); 3797 return (0); 3798 } 3799 if (zfs_destroy(zhp, B_FALSE) != 0) 3800 cbp->cb_error = B_TRUE; 3801 else 3802 changelist_remove(clp, zhp->zfs_name); 3803 (void) changelist_postfix(clp); 3804 changelist_free(clp); 3805 3806 zfs_close(zhp); 3807 return (0); 3808} 3809 3810static int 3811rollback_destroy(zfs_handle_t *zhp, void *data) 3812{ 3813 rollback_data_t *cbp = data; 3814 3815 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3816 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3817 rollback_destroy_dependent, cbp); 3818 3819 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3820 } 3821 3822 zfs_close(zhp); 3823 return (0); 3824} 3825 3826/* 3827 * Given a dataset, rollback to a specific snapshot, discarding any 3828 * data changes since then and making it the active dataset. 3829 * 3830 * Any snapshots and bookmarks more recent than the target are 3831 * destroyed, along with their dependents (i.e. clones). 3832 */ 3833int 3834zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3835{ 3836 rollback_data_t cb = { 0 }; 3837 int err; 3838 boolean_t restore_resv = 0; 3839 uint64_t old_volsize, new_volsize; 3840 zfs_prop_t resv_prop; 3841 3842 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3843 zhp->zfs_type == ZFS_TYPE_VOLUME); 3844 3845 /* 3846 * Destroy all recent snapshots and their dependents. 3847 */ 3848 cb.cb_force = force; 3849 cb.cb_target = snap->zfs_name; 3850 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3851 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3852 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3853 3854 if (cb.cb_error) 3855 return (-1); 3856 3857 /* 3858 * Now that we have verified that the snapshot is the latest, 3859 * rollback to the given snapshot. 3860 */ 3861 3862 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3863 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3864 return (-1); 3865 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3866 restore_resv = 3867 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3868 } 3869 3870 /* 3871 * We rely on zfs_iter_children() to verify that there are no 3872 * newer snapshots for the given dataset. Therefore, we can 3873 * simply pass the name on to the ioctl() call. There is still 3874 * an unlikely race condition where the user has taken a 3875 * snapshot since we verified that this was the most recent. 3876 */ 3877 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3878 if (err != 0) { 3879 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3880 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3881 zhp->zfs_name); 3882 return (err); 3883 } 3884 3885 /* 3886 * For volumes, if the pre-rollback volsize matched the pre- 3887 * rollback reservation and the volsize has changed then set 3888 * the reservation property to the post-rollback volsize. 3889 * Make a new handle since the rollback closed the dataset. 3890 */ 3891 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3892 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3893 if (restore_resv) { 3894 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3895 if (old_volsize != new_volsize) 3896 err = zfs_prop_set_int(zhp, resv_prop, 3897 new_volsize); 3898 } 3899 zfs_close(zhp); 3900 } 3901 return (err); 3902} 3903 3904/* 3905 * Renames the given dataset. 3906 */ 3907int 3908zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3909 renameflags_t flags) 3910{ 3911 int ret; 3912 zfs_cmd_t zc = { 0 }; 3913 char *delim; 3914 prop_changelist_t *cl = NULL; 3915 zfs_handle_t *zhrp = NULL; 3916 char *parentname = NULL; 3917 char parent[ZFS_MAXNAMELEN]; 3918 char property[ZFS_MAXPROPLEN]; 3919 libzfs_handle_t *hdl = zhp->zfs_hdl; 3920 char errbuf[1024]; 3921 3922 /* if we have the same exact name, just return success */ 3923 if (strcmp(zhp->zfs_name, target) == 0) 3924 return (0); 3925 3926 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3927 "cannot rename to '%s'"), target); 3928 3929 if (source != NULL) { 3930 /* 3931 * This is recursive snapshots rename, put snapshot name 3932 * (that might not exist) into zfs_name. 3933 */ 3934 assert(flags.recurse); 3935 3936 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3937 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3938 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3939 } 3940 3941 /* 3942 * Make sure the target name is valid 3943 */ 3944 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3945 if ((strchr(target, '@') == NULL) || 3946 *target == '@') { 3947 /* 3948 * Snapshot target name is abbreviated, 3949 * reconstruct full dataset name 3950 */ 3951 (void) strlcpy(parent, zhp->zfs_name, 3952 sizeof (parent)); 3953 delim = strchr(parent, '@'); 3954 if (strchr(target, '@') == NULL) 3955 *(++delim) = '\0'; 3956 else 3957 *delim = '\0'; 3958 (void) strlcat(parent, target, sizeof (parent)); 3959 target = parent; 3960 } else { 3961 /* 3962 * Make sure we're renaming within the same dataset. 3963 */ 3964 delim = strchr(target, '@'); 3965 if (strncmp(zhp->zfs_name, target, delim - target) 3966 != 0 || zhp->zfs_name[delim - target] != '@') { 3967 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3968 "snapshots must be part of same " 3969 "dataset")); 3970 return (zfs_error(hdl, EZFS_CROSSTARGET, 3971 errbuf)); 3972 } 3973 } 3974 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3975 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3976 } else { 3977 if (flags.recurse) { 3978 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3979 "recursive rename must be a snapshot")); 3980 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3981 } 3982 3983 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3984 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3985 3986 /* validate parents */ 3987 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3988 return (-1); 3989 3990 /* make sure we're in the same pool */ 3991 verify((delim = strchr(target, '/')) != NULL); 3992 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3993 zhp->zfs_name[delim - target] != '/') { 3994 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3995 "datasets must be within same pool")); 3996 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3997 } 3998 3999 /* new name cannot be a child of the current dataset name */ 4000 if (is_descendant(zhp->zfs_name, target)) { 4001 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4002 "New dataset name cannot be a descendant of " 4003 "current dataset name")); 4004 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4005 } 4006 } 4007 4008 (void) snprintf(errbuf, sizeof (errbuf), 4009 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4010 4011 if (getzoneid() == GLOBAL_ZONEID && 4012 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4013 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4014 "dataset is used in a non-global zone")); 4015 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4016 } 4017 4018 /* 4019 * Avoid unmounting file systems with mountpoint property set to 4020 * 'legacy' or 'none' even if -u option is not given. 4021 */ 4022 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4023 !flags.recurse && !flags.nounmount && 4024 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4025 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4026 (strcmp(property, "legacy") == 0 || 4027 strcmp(property, "none") == 0)) { 4028 flags.nounmount = B_TRUE; 4029 } 4030 if (flags.recurse) { 4031 4032 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4033 if (parentname == NULL) { 4034 ret = -1; 4035 goto error; 4036 } 4037 delim = strchr(parentname, '@'); 4038 *delim = '\0'; 4039 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4040 if (zhrp == NULL) { 4041 ret = -1; 4042 goto error; 4043 } 4044 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4045 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4046 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4047 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4048 return (-1); 4049 } 4050 4051 if (changelist_haszonedchild(cl)) { 4052 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4053 "child dataset with inherited mountpoint is used " 4054 "in a non-global zone")); 4055 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4056 goto error; 4057 } 4058 4059 if ((ret = changelist_prefix(cl)) != 0) 4060 goto error; 4061 } 4062 4063 if (ZFS_IS_VOLUME(zhp)) 4064 zc.zc_objset_type = DMU_OST_ZVOL; 4065 else 4066 zc.zc_objset_type = DMU_OST_ZFS; 4067 4068 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4069 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4070 4071 zc.zc_cookie = flags.recurse ? 1 : 0; 4072 if (flags.nounmount) 4073 zc.zc_cookie |= 2; 4074 4075 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4076 /* 4077 * if it was recursive, the one that actually failed will 4078 * be in zc.zc_name 4079 */ 4080 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4081 "cannot rename '%s'"), zc.zc_name); 4082 4083 if (flags.recurse && errno == EEXIST) { 4084 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4085 "a child dataset already has a snapshot " 4086 "with the new name")); 4087 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4088 } else { 4089 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4090 } 4091 4092 /* 4093 * On failure, we still want to remount any filesystems that 4094 * were previously mounted, so we don't alter the system state. 4095 */ 4096 if (cl != NULL) 4097 (void) changelist_postfix(cl); 4098 } else { 4099 if (cl != NULL) { 4100 changelist_rename(cl, zfs_get_name(zhp), target); 4101 ret = changelist_postfix(cl); 4102 } 4103 } 4104 4105error: 4106 if (parentname != NULL) { 4107 free(parentname); 4108 } 4109 if (zhrp != NULL) { 4110 zfs_close(zhrp); 4111 } 4112 if (cl != NULL) { 4113 changelist_free(cl); 4114 } 4115 return (ret); 4116} 4117 4118nvlist_t * 4119zfs_get_user_props(zfs_handle_t *zhp) 4120{ 4121 return (zhp->zfs_user_props); 4122} 4123 4124nvlist_t * 4125zfs_get_recvd_props(zfs_handle_t *zhp) 4126{ 4127 if (zhp->zfs_recvd_props == NULL) 4128 if (get_recvd_props_ioctl(zhp) != 0) 4129 return (NULL); 4130 return (zhp->zfs_recvd_props); 4131} 4132 4133/* 4134 * This function is used by 'zfs list' to determine the exact set of columns to 4135 * display, and their maximum widths. This does two main things: 4136 * 4137 * - If this is a list of all properties, then expand the list to include 4138 * all native properties, and set a flag so that for each dataset we look 4139 * for new unique user properties and add them to the list. 4140 * 4141 * - For non fixed-width properties, keep track of the maximum width seen 4142 * so that we can size the column appropriately. If the user has 4143 * requested received property values, we also need to compute the width 4144 * of the RECEIVED column. 4145 */ 4146int 4147zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4148 boolean_t literal) 4149{ 4150 libzfs_handle_t *hdl = zhp->zfs_hdl; 4151 zprop_list_t *entry; 4152 zprop_list_t **last, **start; 4153 nvlist_t *userprops, *propval; 4154 nvpair_t *elem; 4155 char *strval; 4156 char buf[ZFS_MAXPROPLEN]; 4157 4158 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4159 return (-1); 4160 4161 userprops = zfs_get_user_props(zhp); 4162 4163 entry = *plp; 4164 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4165 /* 4166 * Go through and add any user properties as necessary. We 4167 * start by incrementing our list pointer to the first 4168 * non-native property. 4169 */ 4170 start = plp; 4171 while (*start != NULL) { 4172 if ((*start)->pl_prop == ZPROP_INVAL) 4173 break; 4174 start = &(*start)->pl_next; 4175 } 4176 4177 elem = NULL; 4178 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4179 /* 4180 * See if we've already found this property in our list. 4181 */ 4182 for (last = start; *last != NULL; 4183 last = &(*last)->pl_next) { 4184 if (strcmp((*last)->pl_user_prop, 4185 nvpair_name(elem)) == 0) 4186 break; 4187 } 4188 4189 if (*last == NULL) { 4190 if ((entry = zfs_alloc(hdl, 4191 sizeof (zprop_list_t))) == NULL || 4192 ((entry->pl_user_prop = zfs_strdup(hdl, 4193 nvpair_name(elem)))) == NULL) { 4194 free(entry); 4195 return (-1); 4196 } 4197 4198 entry->pl_prop = ZPROP_INVAL; 4199 entry->pl_width = strlen(nvpair_name(elem)); 4200 entry->pl_all = B_TRUE; 4201 *last = entry; 4202 } 4203 } 4204 } 4205 4206 /* 4207 * Now go through and check the width of any non-fixed columns 4208 */ 4209 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4210 if (entry->pl_fixed && !literal) 4211 continue; 4212 4213 if (entry->pl_prop != ZPROP_INVAL) { 4214 if (zfs_prop_get(zhp, entry->pl_prop, 4215 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4216 if (strlen(buf) > entry->pl_width) 4217 entry->pl_width = strlen(buf); 4218 } 4219 if (received && zfs_prop_get_recvd(zhp, 4220 zfs_prop_to_name(entry->pl_prop), 4221 buf, sizeof (buf), literal) == 0) 4222 if (strlen(buf) > entry->pl_recvd_width) 4223 entry->pl_recvd_width = strlen(buf); 4224 } else { 4225 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4226 &propval) == 0) { 4227 verify(nvlist_lookup_string(propval, 4228 ZPROP_VALUE, &strval) == 0); 4229 if (strlen(strval) > entry->pl_width) 4230 entry->pl_width = strlen(strval); 4231 } 4232 if (received && zfs_prop_get_recvd(zhp, 4233 entry->pl_user_prop, 4234 buf, sizeof (buf), literal) == 0) 4235 if (strlen(buf) > entry->pl_recvd_width) 4236 entry->pl_recvd_width = strlen(buf); 4237 } 4238 } 4239 4240 return (0); 4241} 4242 4243int 4244zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4245 char *resource, void *export, void *sharetab, 4246 int sharemax, zfs_share_op_t operation) 4247{ 4248 zfs_cmd_t zc = { 0 }; 4249 int error; 4250 4251 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4252 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4253 if (resource) 4254 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4255 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4256 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4257 zc.zc_share.z_sharetype = operation; 4258 zc.zc_share.z_sharemax = sharemax; 4259 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4260 return (error); 4261} 4262 4263void 4264zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4265{ 4266 nvpair_t *curr; 4267 4268 /* 4269 * Keep a reference to the props-table against which we prune the 4270 * properties. 4271 */ 4272 zhp->zfs_props_table = props; 4273 4274 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4275 4276 while (curr) { 4277 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4278 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4279 4280 /* 4281 * User properties will result in ZPROP_INVAL, and since we 4282 * only know how to prune standard ZFS properties, we always 4283 * leave these in the list. This can also happen if we 4284 * encounter an unknown DSL property (when running older 4285 * software, for example). 4286 */ 4287 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4288 (void) nvlist_remove(zhp->zfs_props, 4289 nvpair_name(curr), nvpair_type(curr)); 4290 curr = next; 4291 } 4292} 4293 4294#ifdef illumos 4295static int 4296zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4297 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4298{ 4299 zfs_cmd_t zc = { 0 }; 4300 nvlist_t *nvlist = NULL; 4301 int error; 4302 4303 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4304 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4305 zc.zc_cookie = (uint64_t)cmd; 4306 4307 if (cmd == ZFS_SMB_ACL_RENAME) { 4308 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4309 (void) no_memory(hdl); 4310 return (0); 4311 } 4312 } 4313 4314 switch (cmd) { 4315 case ZFS_SMB_ACL_ADD: 4316 case ZFS_SMB_ACL_REMOVE: 4317 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4318 break; 4319 case ZFS_SMB_ACL_RENAME: 4320 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4321 resource1) != 0) { 4322 (void) no_memory(hdl); 4323 return (-1); 4324 } 4325 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4326 resource2) != 0) { 4327 (void) no_memory(hdl); 4328 return (-1); 4329 } 4330 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4331 nvlist_free(nvlist); 4332 return (-1); 4333 } 4334 break; 4335 case ZFS_SMB_ACL_PURGE: 4336 break; 4337 default: 4338 return (-1); 4339 } 4340 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4341 nvlist_free(nvlist); 4342 return (error); 4343} 4344 4345int 4346zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4347 char *path, char *resource) 4348{ 4349 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4350 resource, NULL)); 4351} 4352 4353int 4354zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4355 char *path, char *resource) 4356{ 4357 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4358 resource, NULL)); 4359} 4360 4361int 4362zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4363{ 4364 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4365 NULL, NULL)); 4366} 4367 4368int 4369zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4370 char *oldname, char *newname) 4371{ 4372 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4373 oldname, newname)); 4374} 4375#endif /* illumos */ 4376 4377int 4378zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4379 zfs_userspace_cb_t func, void *arg) 4380{ 4381 zfs_cmd_t zc = { 0 }; 4382 zfs_useracct_t buf[100]; 4383 libzfs_handle_t *hdl = zhp->zfs_hdl; 4384 int ret; 4385 4386 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4387 4388 zc.zc_objset_type = type; 4389 zc.zc_nvlist_dst = (uintptr_t)buf; 4390 4391 for (;;) { 4392 zfs_useracct_t *zua = buf; 4393 4394 zc.zc_nvlist_dst_size = sizeof (buf); 4395 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4396 char errbuf[1024]; 4397 4398 (void) snprintf(errbuf, sizeof (errbuf), 4399 dgettext(TEXT_DOMAIN, 4400 "cannot get used/quota for %s"), zc.zc_name); 4401 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4402 } 4403 if (zc.zc_nvlist_dst_size == 0) 4404 break; 4405 4406 while (zc.zc_nvlist_dst_size > 0) { 4407 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4408 zua->zu_space)) != 0) 4409 return (ret); 4410 zua++; 4411 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4412 } 4413 } 4414 4415 return (0); 4416} 4417 4418struct holdarg { 4419 nvlist_t *nvl; 4420 const char *snapname; 4421 const char *tag; 4422 boolean_t recursive; 4423 int error; 4424}; 4425 4426static int 4427zfs_hold_one(zfs_handle_t *zhp, void *arg) 4428{ 4429 struct holdarg *ha = arg; 4430 char name[ZFS_MAXNAMELEN]; 4431 int rv = 0; 4432 4433 (void) snprintf(name, sizeof (name), 4434 "%s@%s", zhp->zfs_name, ha->snapname); 4435 4436 if (lzc_exists(name)) 4437 fnvlist_add_string(ha->nvl, name, ha->tag); 4438 4439 if (ha->recursive) 4440 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4441 zfs_close(zhp); 4442 return (rv); 4443} 4444 4445int 4446zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4447 boolean_t recursive, int cleanup_fd) 4448{ 4449 int ret; 4450 struct holdarg ha; 4451 4452 ha.nvl = fnvlist_alloc(); 4453 ha.snapname = snapname; 4454 ha.tag = tag; 4455 ha.recursive = recursive; 4456 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4457 4458 if (nvlist_empty(ha.nvl)) { 4459 char errbuf[1024]; 4460 4461 fnvlist_free(ha.nvl); 4462 ret = ENOENT; 4463 (void) snprintf(errbuf, sizeof (errbuf), 4464 dgettext(TEXT_DOMAIN, 4465 "cannot hold snapshot '%s@%s'"), 4466 zhp->zfs_name, snapname); 4467 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4468 return (ret); 4469 } 4470 4471 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4472 fnvlist_free(ha.nvl); 4473 4474 return (ret); 4475} 4476 4477int 4478zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4479{ 4480 int ret; 4481 nvlist_t *errors; 4482 libzfs_handle_t *hdl = zhp->zfs_hdl; 4483 char errbuf[1024]; 4484 nvpair_t *elem; 4485 4486 errors = NULL; 4487 ret = lzc_hold(holds, cleanup_fd, &errors); 4488 4489 if (ret == 0) { 4490 /* There may be errors even in the success case. */ 4491 fnvlist_free(errors); 4492 return (0); 4493 } 4494 4495 if (nvlist_empty(errors)) { 4496 /* no hold-specific errors */ 4497 (void) snprintf(errbuf, sizeof (errbuf), 4498 dgettext(TEXT_DOMAIN, "cannot hold")); 4499 switch (ret) { 4500 case ENOTSUP: 4501 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4502 "pool must be upgraded")); 4503 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4504 break; 4505 case EINVAL: 4506 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4507 break; 4508 default: 4509 (void) zfs_standard_error(hdl, ret, errbuf); 4510 } 4511 } 4512 4513 for (elem = nvlist_next_nvpair(errors, NULL); 4514 elem != NULL; 4515 elem = nvlist_next_nvpair(errors, elem)) { 4516 (void) snprintf(errbuf, sizeof (errbuf), 4517 dgettext(TEXT_DOMAIN, 4518 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4519 switch (fnvpair_value_int32(elem)) { 4520 case E2BIG: 4521 /* 4522 * Temporary tags wind up having the ds object id 4523 * prepended. So even if we passed the length check 4524 * above, it's still possible for the tag to wind 4525 * up being slightly too long. 4526 */ 4527 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4528 break; 4529 case EINVAL: 4530 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4531 break; 4532 case EEXIST: 4533 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4534 break; 4535 default: 4536 (void) zfs_standard_error(hdl, 4537 fnvpair_value_int32(elem), errbuf); 4538 } 4539 } 4540 4541 fnvlist_free(errors); 4542 return (ret); 4543} 4544 4545static int 4546zfs_release_one(zfs_handle_t *zhp, void *arg) 4547{ 4548 struct holdarg *ha = arg; 4549 char name[ZFS_MAXNAMELEN]; 4550 int rv = 0; 4551 nvlist_t *existing_holds; 4552 4553 (void) snprintf(name, sizeof (name), 4554 "%s@%s", zhp->zfs_name, ha->snapname); 4555 4556 if (lzc_get_holds(name, &existing_holds) != 0) { 4557 ha->error = ENOENT; 4558 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4559 ha->error = ESRCH; 4560 } else { 4561 nvlist_t *torelease = fnvlist_alloc(); 4562 fnvlist_add_boolean(torelease, ha->tag); 4563 fnvlist_add_nvlist(ha->nvl, name, torelease); 4564 fnvlist_free(torelease); 4565 } 4566 4567 if (ha->recursive) 4568 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4569 zfs_close(zhp); 4570 return (rv); 4571} 4572 4573int 4574zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4575 boolean_t recursive) 4576{ 4577 int ret; 4578 struct holdarg ha; 4579 nvlist_t *errors = NULL; 4580 nvpair_t *elem; 4581 libzfs_handle_t *hdl = zhp->zfs_hdl; 4582 char errbuf[1024]; 4583 4584 ha.nvl = fnvlist_alloc(); 4585 ha.snapname = snapname; 4586 ha.tag = tag; 4587 ha.recursive = recursive; 4588 ha.error = 0; 4589 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4590 4591 if (nvlist_empty(ha.nvl)) { 4592 fnvlist_free(ha.nvl); 4593 ret = ha.error; 4594 (void) snprintf(errbuf, sizeof (errbuf), 4595 dgettext(TEXT_DOMAIN, 4596 "cannot release hold from snapshot '%s@%s'"), 4597 zhp->zfs_name, snapname); 4598 if (ret == ESRCH) { 4599 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4600 } else { 4601 (void) zfs_standard_error(hdl, ret, errbuf); 4602 } 4603 return (ret); 4604 } 4605 4606 ret = lzc_release(ha.nvl, &errors); 4607 fnvlist_free(ha.nvl); 4608 4609 if (ret == 0) { 4610 /* There may be errors even in the success case. */ 4611 fnvlist_free(errors); 4612 return (0); 4613 } 4614 4615 if (nvlist_empty(errors)) { 4616 /* no hold-specific errors */ 4617 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4618 "cannot release")); 4619 switch (errno) { 4620 case ENOTSUP: 4621 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4622 "pool must be upgraded")); 4623 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4624 break; 4625 default: 4626 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4627 } 4628 } 4629 4630 for (elem = nvlist_next_nvpair(errors, NULL); 4631 elem != NULL; 4632 elem = nvlist_next_nvpair(errors, elem)) { 4633 (void) snprintf(errbuf, sizeof (errbuf), 4634 dgettext(TEXT_DOMAIN, 4635 "cannot release hold from snapshot '%s'"), 4636 nvpair_name(elem)); 4637 switch (fnvpair_value_int32(elem)) { 4638 case ESRCH: 4639 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4640 break; 4641 case EINVAL: 4642 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4643 break; 4644 default: 4645 (void) zfs_standard_error_fmt(hdl, 4646 fnvpair_value_int32(elem), errbuf); 4647 } 4648 } 4649 4650 fnvlist_free(errors); 4651 return (ret); 4652} 4653 4654int 4655zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4656{ 4657 zfs_cmd_t zc = { 0 }; 4658 libzfs_handle_t *hdl = zhp->zfs_hdl; 4659 int nvsz = 2048; 4660 void *nvbuf; 4661 int err = 0; 4662 char errbuf[1024]; 4663 4664 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4665 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4666 4667tryagain: 4668 4669 nvbuf = malloc(nvsz); 4670 if (nvbuf == NULL) { 4671 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4672 goto out; 4673 } 4674 4675 zc.zc_nvlist_dst_size = nvsz; 4676 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4677 4678 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN); 4679 4680 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4681 (void) snprintf(errbuf, sizeof (errbuf), 4682 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4683 zc.zc_name); 4684 switch (errno) { 4685 case ENOMEM: 4686 free(nvbuf); 4687 nvsz = zc.zc_nvlist_dst_size; 4688 goto tryagain; 4689 4690 case ENOTSUP: 4691 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4692 "pool must be upgraded")); 4693 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4694 break; 4695 case EINVAL: 4696 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4697 break; 4698 case ENOENT: 4699 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4700 break; 4701 default: 4702 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4703 break; 4704 } 4705 } else { 4706 /* success */ 4707 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4708 if (rc) { 4709 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4710 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4711 zc.zc_name); 4712 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4713 } 4714 } 4715 4716 free(nvbuf); 4717out: 4718 return (err); 4719} 4720 4721int 4722zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4723{ 4724 zfs_cmd_t zc = { 0 }; 4725 libzfs_handle_t *hdl = zhp->zfs_hdl; 4726 char *nvbuf; 4727 char errbuf[1024]; 4728 size_t nvsz; 4729 int err; 4730 4731 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4732 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4733 4734 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4735 assert(err == 0); 4736 4737 nvbuf = malloc(nvsz); 4738 4739 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4740 assert(err == 0); 4741 4742 zc.zc_nvlist_src_size = nvsz; 4743 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4744 zc.zc_perm_action = un; 4745 4746 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4747 4748 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4749 (void) snprintf(errbuf, sizeof (errbuf), 4750 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4751 zc.zc_name); 4752 switch (errno) { 4753 case ENOTSUP: 4754 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4755 "pool must be upgraded")); 4756 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4757 break; 4758 case EINVAL: 4759 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4760 break; 4761 case ENOENT: 4762 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4763 break; 4764 default: 4765 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4766 break; 4767 } 4768 } 4769 4770 free(nvbuf); 4771 4772 return (err); 4773} 4774 4775int 4776zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4777{ 4778 int err; 4779 char errbuf[1024]; 4780 4781 err = lzc_get_holds(zhp->zfs_name, nvl); 4782 4783 if (err != 0) { 4784 libzfs_handle_t *hdl = zhp->zfs_hdl; 4785 4786 (void) snprintf(errbuf, sizeof (errbuf), 4787 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4788 zhp->zfs_name); 4789 switch (err) { 4790 case ENOTSUP: 4791 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4792 "pool must be upgraded")); 4793 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4794 break; 4795 case EINVAL: 4796 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4797 break; 4798 case ENOENT: 4799 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4800 break; 4801 default: 4802 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4803 break; 4804 } 4805 } 4806 4807 return (err); 4808} 4809 4810/* 4811 * Convert the zvol's volume size to an appropriate reservation. 4812 * Note: If this routine is updated, it is necessary to update the ZFS test 4813 * suite's shell version in reservation.kshlib. 4814 */ 4815uint64_t 4816zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4817{ 4818 uint64_t numdb; 4819 uint64_t nblocks, volblocksize; 4820 int ncopies; 4821 char *strval; 4822 4823 if (nvlist_lookup_string(props, 4824 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4825 ncopies = atoi(strval); 4826 else 4827 ncopies = 1; 4828 if (nvlist_lookup_uint64(props, 4829 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4830 &volblocksize) != 0) 4831 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4832 nblocks = volsize/volblocksize; 4833 /* start with metadnode L0-L6 */ 4834 numdb = 7; 4835 /* calculate number of indirects */ 4836 while (nblocks > 1) { 4837 nblocks += DNODES_PER_LEVEL - 1; 4838 nblocks /= DNODES_PER_LEVEL; 4839 numdb += nblocks; 4840 } 4841 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4842 volsize *= ncopies; 4843 /* 4844 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4845 * compressed, but in practice they compress down to about 4846 * 1100 bytes 4847 */ 4848 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4849 volsize += numdb; 4850 return (volsize); 4851} 4852 4853/* 4854 * Attach/detach the given filesystem to/from the given jail. 4855 */ 4856int 4857zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4858{ 4859 libzfs_handle_t *hdl = zhp->zfs_hdl; 4860 zfs_cmd_t zc = { 0 }; 4861 char errbuf[1024]; 4862 unsigned long cmd; 4863 int ret; 4864 4865 if (attach) { 4866 (void) snprintf(errbuf, sizeof (errbuf), 4867 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4868 } else { 4869 (void) snprintf(errbuf, sizeof (errbuf), 4870 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4871 } 4872 4873 switch (zhp->zfs_type) { 4874 case ZFS_TYPE_VOLUME: 4875 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4876 "volumes can not be jailed")); 4877 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4878 case ZFS_TYPE_SNAPSHOT: 4879 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4880 "snapshots can not be jailed")); 4881 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4882 } 4883 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4884 4885 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4886 zc.zc_objset_type = DMU_OST_ZFS; 4887 zc.zc_jailid = jailid; 4888 4889 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4890 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4891 zfs_standard_error(hdl, errno, errbuf); 4892 4893 return (ret); 4894} 4895