libzfs_dataset.c revision 276081
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, 2014 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek <pawel@dawidek.net>. 28 * All rights reserved. 29 * Copyright (c) 2012 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 30 * Copyright (c) 2013 Steven Hartland. All rights reserved. 31 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 32 */ 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, const char *errbuf) 894{ 895 nvpair_t *elem; 896 uint64_t intval; 897 char *strval; 898 zfs_prop_t prop; 899 nvlist_t *ret; 900 int chosen_normal = -1; 901 int chosen_utf = -1; 902 903 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 904 (void) no_memory(hdl); 905 return (NULL); 906 } 907 908 /* 909 * Make sure this property is valid and applies to this type. 910 */ 911 912 elem = NULL; 913 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 914 const char *propname = nvpair_name(elem); 915 916 prop = zfs_name_to_prop(propname); 917 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 918 /* 919 * This is a user property: make sure it's a 920 * string, and that it's less than ZAP_MAXNAMELEN. 921 */ 922 if (nvpair_type(elem) != DATA_TYPE_STRING) { 923 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 924 "'%s' must be a string"), propname); 925 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 926 goto error; 927 } 928 929 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 930 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 931 "property name '%s' is too long"), 932 propname); 933 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 934 goto error; 935 } 936 937 (void) nvpair_value_string(elem, &strval); 938 if (nvlist_add_string(ret, propname, strval) != 0) { 939 (void) no_memory(hdl); 940 goto error; 941 } 942 continue; 943 } 944 945 /* 946 * Currently, only user properties can be modified on 947 * snapshots. 948 */ 949 if (type == ZFS_TYPE_SNAPSHOT) { 950 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 951 "this property can not be modified for snapshots")); 952 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 953 goto error; 954 } 955 956 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 957 zfs_userquota_prop_t uqtype; 958 char newpropname[128]; 959 char domain[128]; 960 uint64_t rid; 961 uint64_t valary[3]; 962 963 if (userquota_propname_decode(propname, zoned, 964 &uqtype, domain, sizeof (domain), &rid) != 0) { 965 zfs_error_aux(hdl, 966 dgettext(TEXT_DOMAIN, 967 "'%s' has an invalid user/group name"), 968 propname); 969 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 970 goto error; 971 } 972 973 if (uqtype != ZFS_PROP_USERQUOTA && 974 uqtype != ZFS_PROP_GROUPQUOTA) { 975 zfs_error_aux(hdl, 976 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 977 propname); 978 (void) zfs_error(hdl, EZFS_PROPREADONLY, 979 errbuf); 980 goto error; 981 } 982 983 if (nvpair_type(elem) == DATA_TYPE_STRING) { 984 (void) nvpair_value_string(elem, &strval); 985 if (strcmp(strval, "none") == 0) { 986 intval = 0; 987 } else if (zfs_nicestrtonum(hdl, 988 strval, &intval) != 0) { 989 (void) zfs_error(hdl, 990 EZFS_BADPROP, errbuf); 991 goto error; 992 } 993 } else if (nvpair_type(elem) == 994 DATA_TYPE_UINT64) { 995 (void) nvpair_value_uint64(elem, &intval); 996 if (intval == 0) { 997 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 998 "use 'none' to disable " 999 "userquota/groupquota")); 1000 goto error; 1001 } 1002 } else { 1003 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1004 "'%s' must be a number"), propname); 1005 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1006 goto error; 1007 } 1008 1009 /* 1010 * Encode the prop name as 1011 * userquota@<hex-rid>-domain, to make it easy 1012 * for the kernel to decode. 1013 */ 1014 (void) snprintf(newpropname, sizeof (newpropname), 1015 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 1016 (longlong_t)rid, domain); 1017 valary[0] = uqtype; 1018 valary[1] = rid; 1019 valary[2] = intval; 1020 if (nvlist_add_uint64_array(ret, newpropname, 1021 valary, 3) != 0) { 1022 (void) no_memory(hdl); 1023 goto error; 1024 } 1025 continue; 1026 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 1027 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1028 "'%s' is readonly"), 1029 propname); 1030 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1031 goto error; 1032 } 1033 1034 if (prop == ZPROP_INVAL) { 1035 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1036 "invalid property '%s'"), propname); 1037 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1038 goto error; 1039 } 1040 1041 if (!zfs_prop_valid_for_type(prop, type)) { 1042 zfs_error_aux(hdl, 1043 dgettext(TEXT_DOMAIN, "'%s' does not " 1044 "apply to datasets of this type"), propname); 1045 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1046 goto error; 1047 } 1048 1049 if (zfs_prop_readonly(prop) && 1050 (!zfs_prop_setonce(prop) || zhp != NULL)) { 1051 zfs_error_aux(hdl, 1052 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1053 propname); 1054 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1055 goto error; 1056 } 1057 1058 if (zprop_parse_value(hdl, elem, prop, type, ret, 1059 &strval, &intval, errbuf) != 0) 1060 goto error; 1061 1062 /* 1063 * Perform some additional checks for specific properties. 1064 */ 1065 switch (prop) { 1066 case ZFS_PROP_VERSION: 1067 { 1068 int version; 1069 1070 if (zhp == NULL) 1071 break; 1072 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1073 if (intval < version) { 1074 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1075 "Can not downgrade; already at version %u"), 1076 version); 1077 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1078 goto error; 1079 } 1080 break; 1081 } 1082 1083 case ZFS_PROP_VOLBLOCKSIZE: 1084 case ZFS_PROP_RECORDSIZE: 1085 { 1086 int maxbs = SPA_MAXBLOCKSIZE; 1087 if (zhp != NULL) { 1088 maxbs = zpool_get_prop_int(zhp->zpool_hdl, 1089 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1090 } 1091 /* 1092 * Volumes are limited to a volblocksize of 128KB, 1093 * because they typically service workloads with 1094 * small random writes, which incur a large performance 1095 * penalty with large blocks. 1096 */ 1097 if (prop == ZFS_PROP_VOLBLOCKSIZE) 1098 maxbs = SPA_OLD_MAXBLOCKSIZE; 1099 /* 1100 * The value must be a power of two between 1101 * SPA_MINBLOCKSIZE and maxbs. 1102 */ 1103 if (intval < SPA_MINBLOCKSIZE || 1104 intval > maxbs || !ISP2(intval)) { 1105 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1106 "'%s' must be power of 2 from 512B " 1107 "to %uKB"), propname, maxbs >> 10); 1108 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1109 goto error; 1110 } 1111 break; 1112 } 1113 case ZFS_PROP_MLSLABEL: 1114 { 1115#ifdef sun 1116 /* 1117 * Verify the mlslabel string and convert to 1118 * internal hex label string. 1119 */ 1120 1121 m_label_t *new_sl; 1122 char *hex = NULL; /* internal label string */ 1123 1124 /* Default value is already OK. */ 1125 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1126 break; 1127 1128 /* Verify the label can be converted to binary form */ 1129 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1130 (str_to_label(strval, &new_sl, MAC_LABEL, 1131 L_NO_CORRECTION, NULL) == -1)) { 1132 goto badlabel; 1133 } 1134 1135 /* Now translate to hex internal label string */ 1136 if (label_to_str(new_sl, &hex, M_INTERNAL, 1137 DEF_NAMES) != 0) { 1138 if (hex) 1139 free(hex); 1140 goto badlabel; 1141 } 1142 m_label_free(new_sl); 1143 1144 /* If string is already in internal form, we're done. */ 1145 if (strcmp(strval, hex) == 0) { 1146 free(hex); 1147 break; 1148 } 1149 1150 /* Replace the label string with the internal form. */ 1151 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1152 DATA_TYPE_STRING); 1153 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1154 hex) == 0); 1155 free(hex); 1156 1157 break; 1158 1159badlabel: 1160 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1161 "invalid mlslabel '%s'"), strval); 1162 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1163 m_label_free(new_sl); /* OK if null */ 1164#else /* !sun */ 1165 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1166 "mlslabel is not supported on FreeBSD")); 1167 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1168#endif /* !sun */ 1169 goto error; 1170 1171 } 1172 1173 case ZFS_PROP_MOUNTPOINT: 1174 { 1175 namecheck_err_t why; 1176 1177 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1178 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1179 break; 1180 1181 if (mountpoint_namecheck(strval, &why)) { 1182 switch (why) { 1183 case NAME_ERR_LEADING_SLASH: 1184 zfs_error_aux(hdl, 1185 dgettext(TEXT_DOMAIN, 1186 "'%s' must be an absolute path, " 1187 "'none', or 'legacy'"), propname); 1188 break; 1189 case NAME_ERR_TOOLONG: 1190 zfs_error_aux(hdl, 1191 dgettext(TEXT_DOMAIN, 1192 "component of '%s' is too long"), 1193 propname); 1194 break; 1195 } 1196 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1197 goto error; 1198 } 1199 } 1200 1201 /*FALLTHRU*/ 1202 1203 case ZFS_PROP_SHARESMB: 1204 case ZFS_PROP_SHARENFS: 1205 /* 1206 * For the mountpoint and sharenfs or sharesmb 1207 * properties, check if it can be set in a 1208 * global/non-global zone based on 1209 * the zoned property value: 1210 * 1211 * global zone non-global zone 1212 * -------------------------------------------------- 1213 * zoned=on mountpoint (no) mountpoint (yes) 1214 * sharenfs (no) sharenfs (no) 1215 * sharesmb (no) sharesmb (no) 1216 * 1217 * zoned=off mountpoint (yes) N/A 1218 * sharenfs (yes) 1219 * sharesmb (yes) 1220 */ 1221 if (zoned) { 1222 if (getzoneid() == GLOBAL_ZONEID) { 1223 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1224 "'%s' cannot be set on " 1225 "dataset in a non-global zone"), 1226 propname); 1227 (void) zfs_error(hdl, EZFS_ZONED, 1228 errbuf); 1229 goto error; 1230 } else if (prop == ZFS_PROP_SHARENFS || 1231 prop == ZFS_PROP_SHARESMB) { 1232 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1233 "'%s' cannot be set in " 1234 "a non-global zone"), propname); 1235 (void) zfs_error(hdl, EZFS_ZONED, 1236 errbuf); 1237 goto error; 1238 } 1239 } else if (getzoneid() != GLOBAL_ZONEID) { 1240 /* 1241 * If zoned property is 'off', this must be in 1242 * a global zone. If not, something is wrong. 1243 */ 1244 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1245 "'%s' cannot be set while dataset " 1246 "'zoned' property is set"), propname); 1247 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1248 goto error; 1249 } 1250 1251 /* 1252 * At this point, it is legitimate to set the 1253 * property. Now we want to make sure that the 1254 * property value is valid if it is sharenfs. 1255 */ 1256 if ((prop == ZFS_PROP_SHARENFS || 1257 prop == ZFS_PROP_SHARESMB) && 1258 strcmp(strval, "on") != 0 && 1259 strcmp(strval, "off") != 0) { 1260 zfs_share_proto_t proto; 1261 1262 if (prop == ZFS_PROP_SHARESMB) 1263 proto = PROTO_SMB; 1264 else 1265 proto = PROTO_NFS; 1266 1267 /* 1268 * Must be an valid sharing protocol 1269 * option string so init the libshare 1270 * in order to enable the parser and 1271 * then parse the options. We use the 1272 * control API since we don't care about 1273 * the current configuration and don't 1274 * want the overhead of loading it 1275 * until we actually do something. 1276 */ 1277 1278 if (zfs_init_libshare(hdl, 1279 SA_INIT_CONTROL_API) != SA_OK) { 1280 /* 1281 * An error occurred so we can't do 1282 * anything 1283 */ 1284 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1285 "'%s' cannot be set: problem " 1286 "in share initialization"), 1287 propname); 1288 (void) zfs_error(hdl, EZFS_BADPROP, 1289 errbuf); 1290 goto error; 1291 } 1292 1293 if (zfs_parse_options(strval, proto) != SA_OK) { 1294 /* 1295 * There was an error in parsing so 1296 * deal with it by issuing an error 1297 * message and leaving after 1298 * uninitializing the the libshare 1299 * interface. 1300 */ 1301 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1302 "'%s' cannot be set to invalid " 1303 "options"), propname); 1304 (void) zfs_error(hdl, EZFS_BADPROP, 1305 errbuf); 1306 zfs_uninit_libshare(hdl); 1307 goto error; 1308 } 1309 zfs_uninit_libshare(hdl); 1310 } 1311 1312 break; 1313 case ZFS_PROP_UTF8ONLY: 1314 chosen_utf = (int)intval; 1315 break; 1316 case ZFS_PROP_NORMALIZE: 1317 chosen_normal = (int)intval; 1318 break; 1319 } 1320 1321 /* 1322 * For changes to existing volumes, we have some additional 1323 * checks to enforce. 1324 */ 1325 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1326 uint64_t volsize = zfs_prop_get_int(zhp, 1327 ZFS_PROP_VOLSIZE); 1328 uint64_t blocksize = zfs_prop_get_int(zhp, 1329 ZFS_PROP_VOLBLOCKSIZE); 1330 char buf[64]; 1331 1332 switch (prop) { 1333 case ZFS_PROP_RESERVATION: 1334 case ZFS_PROP_REFRESERVATION: 1335 if (intval > volsize) { 1336 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1337 "'%s' is greater than current " 1338 "volume size"), propname); 1339 (void) zfs_error(hdl, EZFS_BADPROP, 1340 errbuf); 1341 goto error; 1342 } 1343 break; 1344 1345 case ZFS_PROP_VOLSIZE: 1346 if (intval % blocksize != 0) { 1347 zfs_nicenum(blocksize, buf, 1348 sizeof (buf)); 1349 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1350 "'%s' must be a multiple of " 1351 "volume block size (%s)"), 1352 propname, buf); 1353 (void) zfs_error(hdl, EZFS_BADPROP, 1354 errbuf); 1355 goto error; 1356 } 1357 1358 if (intval == 0) { 1359 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1360 "'%s' cannot be zero"), 1361 propname); 1362 (void) zfs_error(hdl, EZFS_BADPROP, 1363 errbuf); 1364 goto error; 1365 } 1366 break; 1367 } 1368 } 1369 } 1370 1371 /* 1372 * If normalization was chosen, but no UTF8 choice was made, 1373 * enforce rejection of non-UTF8 names. 1374 * 1375 * If normalization was chosen, but rejecting non-UTF8 names 1376 * was explicitly not chosen, it is an error. 1377 */ 1378 if (chosen_normal > 0 && chosen_utf < 0) { 1379 if (nvlist_add_uint64(ret, 1380 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1381 (void) no_memory(hdl); 1382 goto error; 1383 } 1384 } else if (chosen_normal > 0 && chosen_utf == 0) { 1385 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1386 "'%s' must be set 'on' if normalization chosen"), 1387 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1388 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1389 goto error; 1390 } 1391 return (ret); 1392 1393error: 1394 nvlist_free(ret); 1395 return (NULL); 1396} 1397 1398int 1399zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1400{ 1401 uint64_t old_volsize; 1402 uint64_t new_volsize; 1403 uint64_t old_reservation; 1404 uint64_t new_reservation; 1405 zfs_prop_t resv_prop; 1406 1407 /* 1408 * If this is an existing volume, and someone is setting the volsize, 1409 * make sure that it matches the reservation, or add it if necessary. 1410 */ 1411 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1412 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1413 return (-1); 1414 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1415 if ((zvol_volsize_to_reservation(old_volsize, zhp->zfs_props) != 1416 old_reservation) || nvlist_lookup_uint64(nvl, 1417 zfs_prop_to_name(resv_prop), &new_reservation) != ENOENT) { 1418 return (0); 1419 } 1420 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1421 &new_volsize) != 0) 1422 return (-1); 1423 new_reservation = zvol_volsize_to_reservation(new_volsize, 1424 zhp->zfs_props); 1425 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1426 new_reservation) != 0) { 1427 (void) no_memory(zhp->zfs_hdl); 1428 return (-1); 1429 } 1430 return (1); 1431} 1432 1433void 1434zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1435 char *errbuf) 1436{ 1437 switch (err) { 1438 1439 case ENOSPC: 1440 /* 1441 * For quotas and reservations, ENOSPC indicates 1442 * something different; setting a quota or reservation 1443 * doesn't use any disk space. 1444 */ 1445 switch (prop) { 1446 case ZFS_PROP_QUOTA: 1447 case ZFS_PROP_REFQUOTA: 1448 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1449 "size is less than current used or " 1450 "reserved space")); 1451 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1452 break; 1453 1454 case ZFS_PROP_RESERVATION: 1455 case ZFS_PROP_REFRESERVATION: 1456 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1457 "size is greater than available space")); 1458 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1459 break; 1460 1461 default: 1462 (void) zfs_standard_error(hdl, err, errbuf); 1463 break; 1464 } 1465 break; 1466 1467 case EBUSY: 1468 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1469 break; 1470 1471 case EROFS: 1472 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1473 break; 1474 1475 case ENOTSUP: 1476 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1477 "pool and or dataset must be upgraded to set this " 1478 "property or value")); 1479 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1480 break; 1481 1482 case ERANGE: 1483 case EDOM: 1484 if (prop == ZFS_PROP_COMPRESSION || 1485 prop == ZFS_PROP_RECORDSIZE) { 1486 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1487 "property setting is not allowed on " 1488 "bootable datasets")); 1489 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1490 } else { 1491 (void) zfs_standard_error(hdl, err, errbuf); 1492 } 1493 break; 1494 1495 case EINVAL: 1496 if (prop == ZPROP_INVAL) { 1497 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1498 } else { 1499 (void) zfs_standard_error(hdl, err, errbuf); 1500 } 1501 break; 1502 1503 case EOVERFLOW: 1504 /* 1505 * This platform can't address a volume this big. 1506 */ 1507#ifdef _ILP32 1508 if (prop == ZFS_PROP_VOLSIZE) { 1509 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1510 break; 1511 } 1512#endif 1513 /* FALLTHROUGH */ 1514 default: 1515 (void) zfs_standard_error(hdl, err, errbuf); 1516 } 1517} 1518 1519/* 1520 * Given a property name and value, set the property for the given dataset. 1521 */ 1522int 1523zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1524{ 1525 zfs_cmd_t zc = { 0 }; 1526 int ret = -1; 1527 prop_changelist_t *cl = NULL; 1528 char errbuf[1024]; 1529 libzfs_handle_t *hdl = zhp->zfs_hdl; 1530 nvlist_t *nvl = NULL, *realprops; 1531 zfs_prop_t prop; 1532 boolean_t do_prefix = B_TRUE; 1533 int added_resv; 1534 1535 (void) snprintf(errbuf, sizeof (errbuf), 1536 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1537 zhp->zfs_name); 1538 1539 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1540 nvlist_add_string(nvl, propname, propval) != 0) { 1541 (void) no_memory(hdl); 1542 goto error; 1543 } 1544 1545 if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl, 1546 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL) 1547 goto error; 1548 1549 nvlist_free(nvl); 1550 nvl = realprops; 1551 1552 prop = zfs_name_to_prop(propname); 1553 1554 /* We don't support those properties on FreeBSD. */ 1555 switch (prop) { 1556 case ZFS_PROP_DEVICES: 1557 case ZFS_PROP_ISCSIOPTIONS: 1558 case ZFS_PROP_XATTR: 1559 case ZFS_PROP_VSCAN: 1560 case ZFS_PROP_NBMAND: 1561 case ZFS_PROP_MLSLABEL: 1562 (void) snprintf(errbuf, sizeof (errbuf), 1563 "property '%s' not supported on FreeBSD", propname); 1564 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1565 goto error; 1566 } 1567 1568 if (prop == ZFS_PROP_VOLSIZE) { 1569 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) 1570 goto error; 1571 } 1572 1573 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1574 goto error; 1575 1576 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1577 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1578 "child dataset with inherited mountpoint is used " 1579 "in a non-global zone")); 1580 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1581 goto error; 1582 } 1583 1584 /* 1585 * We don't want to unmount & remount the dataset when changing 1586 * its canmount property to 'on' or 'noauto'. We only use 1587 * the changelist logic to unmount when setting canmount=off. 1588 */ 1589 if (prop == ZFS_PROP_CANMOUNT) { 1590 uint64_t idx; 1591 int err = zprop_string_to_index(prop, propval, &idx, 1592 ZFS_TYPE_DATASET); 1593 if (err == 0 && idx != ZFS_CANMOUNT_OFF) 1594 do_prefix = B_FALSE; 1595 } 1596 1597 if (do_prefix && (ret = changelist_prefix(cl)) != 0) 1598 goto error; 1599 1600 /* 1601 * Execute the corresponding ioctl() to set this property. 1602 */ 1603 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1604 1605 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1606 goto error; 1607 1608 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1609 1610 if (ret != 0) { 1611 zfs_setprop_error(hdl, prop, errno, errbuf); 1612 if (added_resv && errno == ENOSPC) { 1613 /* clean up the volsize property we tried to set */ 1614 uint64_t old_volsize = zfs_prop_get_int(zhp, 1615 ZFS_PROP_VOLSIZE); 1616 nvlist_free(nvl); 1617 zcmd_free_nvlists(&zc); 1618 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1619 goto error; 1620 if (nvlist_add_uint64(nvl, 1621 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1622 old_volsize) != 0) 1623 goto error; 1624 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1625 goto error; 1626 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1627 } 1628 } else { 1629 if (do_prefix) 1630 ret = changelist_postfix(cl); 1631 1632 /* 1633 * Refresh the statistics so the new property value 1634 * is reflected. 1635 */ 1636 if (ret == 0) 1637 (void) get_stats(zhp); 1638 } 1639 1640error: 1641 nvlist_free(nvl); 1642 zcmd_free_nvlists(&zc); 1643 if (cl) 1644 changelist_free(cl); 1645 return (ret); 1646} 1647 1648/* 1649 * Given a property, inherit the value from the parent dataset, or if received 1650 * is TRUE, revert to the received value, if any. 1651 */ 1652int 1653zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1654{ 1655 zfs_cmd_t zc = { 0 }; 1656 int ret; 1657 prop_changelist_t *cl; 1658 libzfs_handle_t *hdl = zhp->zfs_hdl; 1659 char errbuf[1024]; 1660 zfs_prop_t prop; 1661 1662 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1663 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1664 1665 zc.zc_cookie = received; 1666 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1667 /* 1668 * For user properties, the amount of work we have to do is very 1669 * small, so just do it here. 1670 */ 1671 if (!zfs_prop_user(propname)) { 1672 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1673 "invalid property")); 1674 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1675 } 1676 1677 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1678 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1679 1680 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1681 return (zfs_standard_error(hdl, errno, errbuf)); 1682 1683 return (0); 1684 } 1685 1686 /* 1687 * Verify that this property is inheritable. 1688 */ 1689 if (zfs_prop_readonly(prop)) 1690 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1691 1692 if (!zfs_prop_inheritable(prop) && !received) 1693 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1694 1695 /* 1696 * Check to see if the value applies to this type 1697 */ 1698 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1699 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1700 1701 /* 1702 * Normalize the name, to get rid of shorthand abbreviations. 1703 */ 1704 propname = zfs_prop_to_name(prop); 1705 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1706 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1707 1708 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1709 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1710 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1711 "dataset is used in a non-global zone")); 1712 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1713 } 1714 1715 /* 1716 * Determine datasets which will be affected by this change, if any. 1717 */ 1718 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1719 return (-1); 1720 1721 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1722 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1723 "child dataset with inherited mountpoint is used " 1724 "in a non-global zone")); 1725 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1726 goto error; 1727 } 1728 1729 if ((ret = changelist_prefix(cl)) != 0) 1730 goto error; 1731 1732 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1733 return (zfs_standard_error(hdl, errno, errbuf)); 1734 } else { 1735 1736 if ((ret = changelist_postfix(cl)) != 0) 1737 goto error; 1738 1739 /* 1740 * Refresh the statistics so the new property is reflected. 1741 */ 1742 (void) get_stats(zhp); 1743 } 1744 1745error: 1746 changelist_free(cl); 1747 return (ret); 1748} 1749 1750/* 1751 * True DSL properties are stored in an nvlist. The following two functions 1752 * extract them appropriately. 1753 */ 1754static uint64_t 1755getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1756{ 1757 nvlist_t *nv; 1758 uint64_t value; 1759 1760 *source = NULL; 1761 if (nvlist_lookup_nvlist(zhp->zfs_props, 1762 zfs_prop_to_name(prop), &nv) == 0) { 1763 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1764 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1765 } else { 1766 verify(!zhp->zfs_props_table || 1767 zhp->zfs_props_table[prop] == B_TRUE); 1768 value = zfs_prop_default_numeric(prop); 1769 *source = ""; 1770 } 1771 1772 return (value); 1773} 1774 1775static char * 1776getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1777{ 1778 nvlist_t *nv; 1779 char *value; 1780 1781 *source = NULL; 1782 if (nvlist_lookup_nvlist(zhp->zfs_props, 1783 zfs_prop_to_name(prop), &nv) == 0) { 1784 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0); 1785 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1786 } else { 1787 verify(!zhp->zfs_props_table || 1788 zhp->zfs_props_table[prop] == B_TRUE); 1789 if ((value = (char *)zfs_prop_default_string(prop)) == NULL) 1790 value = ""; 1791 *source = ""; 1792 } 1793 1794 return (value); 1795} 1796 1797static boolean_t 1798zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1799{ 1800 return (zhp->zfs_props == zhp->zfs_recvd_props); 1801} 1802 1803static void 1804zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1805{ 1806 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1807 zhp->zfs_props = zhp->zfs_recvd_props; 1808} 1809 1810static void 1811zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1812{ 1813 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1814 *cookie = 0; 1815} 1816 1817/* 1818 * Internal function for getting a numeric property. Both zfs_prop_get() and 1819 * zfs_prop_get_int() are built using this interface. 1820 * 1821 * Certain properties can be overridden using 'mount -o'. In this case, scan 1822 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1823 * If they differ from the on-disk values, report the current values and mark 1824 * the source "temporary". 1825 */ 1826static int 1827get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1828 char **source, uint64_t *val) 1829{ 1830 zfs_cmd_t zc = { 0 }; 1831 nvlist_t *zplprops = NULL; 1832 struct mnttab mnt; 1833 char *mntopt_on = NULL; 1834 char *mntopt_off = NULL; 1835 boolean_t received = zfs_is_recvd_props_mode(zhp); 1836 1837 *source = NULL; 1838 1839 switch (prop) { 1840 case ZFS_PROP_ATIME: 1841 mntopt_on = MNTOPT_ATIME; 1842 mntopt_off = MNTOPT_NOATIME; 1843 break; 1844 1845 case ZFS_PROP_DEVICES: 1846 mntopt_on = MNTOPT_DEVICES; 1847 mntopt_off = MNTOPT_NODEVICES; 1848 break; 1849 1850 case ZFS_PROP_EXEC: 1851 mntopt_on = MNTOPT_EXEC; 1852 mntopt_off = MNTOPT_NOEXEC; 1853 break; 1854 1855 case ZFS_PROP_READONLY: 1856 mntopt_on = MNTOPT_RO; 1857 mntopt_off = MNTOPT_RW; 1858 break; 1859 1860 case ZFS_PROP_SETUID: 1861 mntopt_on = MNTOPT_SETUID; 1862 mntopt_off = MNTOPT_NOSETUID; 1863 break; 1864 1865 case ZFS_PROP_XATTR: 1866 mntopt_on = MNTOPT_XATTR; 1867 mntopt_off = MNTOPT_NOXATTR; 1868 break; 1869 1870 case ZFS_PROP_NBMAND: 1871 mntopt_on = MNTOPT_NBMAND; 1872 mntopt_off = MNTOPT_NONBMAND; 1873 break; 1874 } 1875 1876 /* 1877 * Because looking up the mount options is potentially expensive 1878 * (iterating over all of /etc/mnttab), we defer its calculation until 1879 * we're looking up a property which requires its presence. 1880 */ 1881 if (!zhp->zfs_mntcheck && 1882 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1883 libzfs_handle_t *hdl = zhp->zfs_hdl; 1884 struct mnttab entry; 1885 1886 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1887 zhp->zfs_mntopts = zfs_strdup(hdl, 1888 entry.mnt_mntopts); 1889 if (zhp->zfs_mntopts == NULL) 1890 return (-1); 1891 } 1892 1893 zhp->zfs_mntcheck = B_TRUE; 1894 } 1895 1896 if (zhp->zfs_mntopts == NULL) 1897 mnt.mnt_mntopts = ""; 1898 else 1899 mnt.mnt_mntopts = zhp->zfs_mntopts; 1900 1901 switch (prop) { 1902 case ZFS_PROP_ATIME: 1903 case ZFS_PROP_DEVICES: 1904 case ZFS_PROP_EXEC: 1905 case ZFS_PROP_READONLY: 1906 case ZFS_PROP_SETUID: 1907 case ZFS_PROP_XATTR: 1908 case ZFS_PROP_NBMAND: 1909 *val = getprop_uint64(zhp, prop, source); 1910 1911 if (received) 1912 break; 1913 1914 if (hasmntopt(&mnt, mntopt_on) && !*val) { 1915 *val = B_TRUE; 1916 if (src) 1917 *src = ZPROP_SRC_TEMPORARY; 1918 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 1919 *val = B_FALSE; 1920 if (src) 1921 *src = ZPROP_SRC_TEMPORARY; 1922 } 1923 break; 1924 1925 case ZFS_PROP_CANMOUNT: 1926 case ZFS_PROP_VOLSIZE: 1927 case ZFS_PROP_QUOTA: 1928 case ZFS_PROP_REFQUOTA: 1929 case ZFS_PROP_RESERVATION: 1930 case ZFS_PROP_REFRESERVATION: 1931 case ZFS_PROP_FILESYSTEM_LIMIT: 1932 case ZFS_PROP_SNAPSHOT_LIMIT: 1933 case ZFS_PROP_FILESYSTEM_COUNT: 1934 case ZFS_PROP_SNAPSHOT_COUNT: 1935 *val = getprop_uint64(zhp, prop, source); 1936 1937 if (*source == NULL) { 1938 /* not default, must be local */ 1939 *source = zhp->zfs_name; 1940 } 1941 break; 1942 1943 case ZFS_PROP_MOUNTED: 1944 *val = (zhp->zfs_mntopts != NULL); 1945 break; 1946 1947 case ZFS_PROP_NUMCLONES: 1948 *val = zhp->zfs_dmustats.dds_num_clones; 1949 break; 1950 1951 case ZFS_PROP_VERSION: 1952 case ZFS_PROP_NORMALIZE: 1953 case ZFS_PROP_UTF8ONLY: 1954 case ZFS_PROP_CASE: 1955 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 1956 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 1957 return (-1); 1958 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1959 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 1960 zcmd_free_nvlists(&zc); 1961 return (-1); 1962 } 1963 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 1964 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 1965 val) != 0) { 1966 zcmd_free_nvlists(&zc); 1967 return (-1); 1968 } 1969 if (zplprops) 1970 nvlist_free(zplprops); 1971 zcmd_free_nvlists(&zc); 1972 break; 1973 1974 case ZFS_PROP_INCONSISTENT: 1975 *val = zhp->zfs_dmustats.dds_inconsistent; 1976 break; 1977 1978 default: 1979 switch (zfs_prop_get_type(prop)) { 1980 case PROP_TYPE_NUMBER: 1981 case PROP_TYPE_INDEX: 1982 *val = getprop_uint64(zhp, prop, source); 1983 /* 1984 * If we tried to use a default value for a 1985 * readonly property, it means that it was not 1986 * present. 1987 */ 1988 if (zfs_prop_readonly(prop) && 1989 *source != NULL && (*source)[0] == '\0') { 1990 *source = NULL; 1991 } 1992 break; 1993 1994 case PROP_TYPE_STRING: 1995 default: 1996 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 1997 "cannot get non-numeric property")); 1998 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 1999 dgettext(TEXT_DOMAIN, "internal error"))); 2000 } 2001 } 2002 2003 return (0); 2004} 2005 2006/* 2007 * Calculate the source type, given the raw source string. 2008 */ 2009static void 2010get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2011 char *statbuf, size_t statlen) 2012{ 2013 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2014 return; 2015 2016 if (source == NULL) { 2017 *srctype = ZPROP_SRC_NONE; 2018 } else if (source[0] == '\0') { 2019 *srctype = ZPROP_SRC_DEFAULT; 2020 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2021 *srctype = ZPROP_SRC_RECEIVED; 2022 } else { 2023 if (strcmp(source, zhp->zfs_name) == 0) { 2024 *srctype = ZPROP_SRC_LOCAL; 2025 } else { 2026 (void) strlcpy(statbuf, source, statlen); 2027 *srctype = ZPROP_SRC_INHERITED; 2028 } 2029 } 2030 2031} 2032 2033int 2034zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2035 size_t proplen, boolean_t literal) 2036{ 2037 zfs_prop_t prop; 2038 int err = 0; 2039 2040 if (zhp->zfs_recvd_props == NULL) 2041 if (get_recvd_props_ioctl(zhp) != 0) 2042 return (-1); 2043 2044 prop = zfs_name_to_prop(propname); 2045 2046 if (prop != ZPROP_INVAL) { 2047 uint64_t cookie; 2048 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2049 return (-1); 2050 zfs_set_recvd_props_mode(zhp, &cookie); 2051 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2052 NULL, NULL, 0, literal); 2053 zfs_unset_recvd_props_mode(zhp, &cookie); 2054 } else { 2055 nvlist_t *propval; 2056 char *recvdval; 2057 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2058 propname, &propval) != 0) 2059 return (-1); 2060 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2061 &recvdval) == 0); 2062 (void) strlcpy(propbuf, recvdval, proplen); 2063 } 2064 2065 return (err == 0 ? 0 : -1); 2066} 2067 2068static int 2069get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2070{ 2071 nvlist_t *value; 2072 nvpair_t *pair; 2073 2074 value = zfs_get_clones_nvl(zhp); 2075 if (value == NULL) 2076 return (-1); 2077 2078 propbuf[0] = '\0'; 2079 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2080 pair = nvlist_next_nvpair(value, pair)) { 2081 if (propbuf[0] != '\0') 2082 (void) strlcat(propbuf, ",", proplen); 2083 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2084 } 2085 2086 return (0); 2087} 2088 2089struct get_clones_arg { 2090 uint64_t numclones; 2091 nvlist_t *value; 2092 const char *origin; 2093 char buf[ZFS_MAXNAMELEN]; 2094}; 2095 2096int 2097get_clones_cb(zfs_handle_t *zhp, void *arg) 2098{ 2099 struct get_clones_arg *gca = arg; 2100 2101 if (gca->numclones == 0) { 2102 zfs_close(zhp); 2103 return (0); 2104 } 2105 2106 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2107 NULL, NULL, 0, B_TRUE) != 0) 2108 goto out; 2109 if (strcmp(gca->buf, gca->origin) == 0) { 2110 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2111 gca->numclones--; 2112 } 2113 2114out: 2115 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2116 zfs_close(zhp); 2117 return (0); 2118} 2119 2120nvlist_t * 2121zfs_get_clones_nvl(zfs_handle_t *zhp) 2122{ 2123 nvlist_t *nv, *value; 2124 2125 if (nvlist_lookup_nvlist(zhp->zfs_props, 2126 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2127 struct get_clones_arg gca; 2128 2129 /* 2130 * if this is a snapshot, then the kernel wasn't able 2131 * to get the clones. Do it by slowly iterating. 2132 */ 2133 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2134 return (NULL); 2135 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2136 return (NULL); 2137 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2138 nvlist_free(nv); 2139 return (NULL); 2140 } 2141 2142 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2143 gca.value = value; 2144 gca.origin = zhp->zfs_name; 2145 2146 if (gca.numclones != 0) { 2147 zfs_handle_t *root; 2148 char pool[ZFS_MAXNAMELEN]; 2149 char *cp = pool; 2150 2151 /* get the pool name */ 2152 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2153 (void) strsep(&cp, "/@"); 2154 root = zfs_open(zhp->zfs_hdl, pool, 2155 ZFS_TYPE_FILESYSTEM); 2156 2157 (void) get_clones_cb(root, &gca); 2158 } 2159 2160 if (gca.numclones != 0 || 2161 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2162 nvlist_add_nvlist(zhp->zfs_props, 2163 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2164 nvlist_free(nv); 2165 nvlist_free(value); 2166 return (NULL); 2167 } 2168 nvlist_free(nv); 2169 nvlist_free(value); 2170 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2171 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2172 } 2173 2174 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2175 2176 return (value); 2177} 2178 2179/* 2180 * Retrieve a property from the given object. If 'literal' is specified, then 2181 * numbers are left as exact values. Otherwise, numbers are converted to a 2182 * human-readable form. 2183 * 2184 * Returns 0 on success, or -1 on error. 2185 */ 2186int 2187zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2188 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2189{ 2190 char *source = NULL; 2191 uint64_t val; 2192 char *str; 2193 const char *strval; 2194 boolean_t received = zfs_is_recvd_props_mode(zhp); 2195 2196 /* 2197 * Check to see if this property applies to our object 2198 */ 2199 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2200 return (-1); 2201 2202 if (received && zfs_prop_readonly(prop)) 2203 return (-1); 2204 2205 if (src) 2206 *src = ZPROP_SRC_NONE; 2207 2208 switch (prop) { 2209 case ZFS_PROP_CREATION: 2210 /* 2211 * 'creation' is a time_t stored in the statistics. We convert 2212 * this into a string unless 'literal' is specified. 2213 */ 2214 { 2215 val = getprop_uint64(zhp, prop, &source); 2216 time_t time = (time_t)val; 2217 struct tm t; 2218 2219 if (literal || 2220 localtime_r(&time, &t) == NULL || 2221 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2222 &t) == 0) 2223 (void) snprintf(propbuf, proplen, "%llu", val); 2224 } 2225 break; 2226 2227 case ZFS_PROP_MOUNTPOINT: 2228 /* 2229 * Getting the precise mountpoint can be tricky. 2230 * 2231 * - for 'none' or 'legacy', return those values. 2232 * - for inherited mountpoints, we want to take everything 2233 * after our ancestor and append it to the inherited value. 2234 * 2235 * If the pool has an alternate root, we want to prepend that 2236 * root to any values we return. 2237 */ 2238 2239 str = getprop_string(zhp, prop, &source); 2240 2241 if (str[0] == '/') { 2242 char buf[MAXPATHLEN]; 2243 char *root = buf; 2244 const char *relpath; 2245 2246 /* 2247 * If we inherit the mountpoint, even from a dataset 2248 * with a received value, the source will be the path of 2249 * the dataset we inherit from. If source is 2250 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2251 * inherited. 2252 */ 2253 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2254 relpath = ""; 2255 } else { 2256 relpath = zhp->zfs_name + strlen(source); 2257 if (relpath[0] == '/') 2258 relpath++; 2259 } 2260 2261 if ((zpool_get_prop(zhp->zpool_hdl, 2262 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2263 B_FALSE)) || (strcmp(root, "-") == 0)) 2264 root[0] = '\0'; 2265 /* 2266 * Special case an alternate root of '/'. This will 2267 * avoid having multiple leading slashes in the 2268 * mountpoint path. 2269 */ 2270 if (strcmp(root, "/") == 0) 2271 root++; 2272 2273 /* 2274 * If the mountpoint is '/' then skip over this 2275 * if we are obtaining either an alternate root or 2276 * an inherited mountpoint. 2277 */ 2278 if (str[1] == '\0' && (root[0] != '\0' || 2279 relpath[0] != '\0')) 2280 str++; 2281 2282 if (relpath[0] == '\0') 2283 (void) snprintf(propbuf, proplen, "%s%s", 2284 root, str); 2285 else 2286 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2287 root, str, relpath[0] == '@' ? "" : "/", 2288 relpath); 2289 } else { 2290 /* 'legacy' or 'none' */ 2291 (void) strlcpy(propbuf, str, proplen); 2292 } 2293 2294 break; 2295 2296 case ZFS_PROP_ORIGIN: 2297 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source), 2298 proplen); 2299 /* 2300 * If there is no parent at all, return failure to indicate that 2301 * it doesn't apply to this dataset. 2302 */ 2303 if (propbuf[0] == '\0') 2304 return (-1); 2305 break; 2306 2307 case ZFS_PROP_CLONES: 2308 if (get_clones_string(zhp, propbuf, proplen) != 0) 2309 return (-1); 2310 break; 2311 2312 case ZFS_PROP_QUOTA: 2313 case ZFS_PROP_REFQUOTA: 2314 case ZFS_PROP_RESERVATION: 2315 case ZFS_PROP_REFRESERVATION: 2316 2317 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2318 return (-1); 2319 2320 /* 2321 * If quota or reservation is 0, we translate this into 'none' 2322 * (unless literal is set), and indicate that it's the default 2323 * value. Otherwise, we print the number nicely and indicate 2324 * that its set locally. 2325 */ 2326 if (val == 0) { 2327 if (literal) 2328 (void) strlcpy(propbuf, "0", proplen); 2329 else 2330 (void) strlcpy(propbuf, "none", proplen); 2331 } else { 2332 if (literal) 2333 (void) snprintf(propbuf, proplen, "%llu", 2334 (u_longlong_t)val); 2335 else 2336 zfs_nicenum(val, propbuf, proplen); 2337 } 2338 break; 2339 2340 case ZFS_PROP_FILESYSTEM_LIMIT: 2341 case ZFS_PROP_SNAPSHOT_LIMIT: 2342 case ZFS_PROP_FILESYSTEM_COUNT: 2343 case ZFS_PROP_SNAPSHOT_COUNT: 2344 2345 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2346 return (-1); 2347 2348 /* 2349 * If limit is UINT64_MAX, we translate this into 'none' (unless 2350 * literal is set), and indicate that it's the default value. 2351 * Otherwise, we print the number nicely and indicate that it's 2352 * set locally. 2353 */ 2354 if (literal) { 2355 (void) snprintf(propbuf, proplen, "%llu", 2356 (u_longlong_t)val); 2357 } else if (val == UINT64_MAX) { 2358 (void) strlcpy(propbuf, "none", proplen); 2359 } else { 2360 zfs_nicenum(val, propbuf, proplen); 2361 } 2362 break; 2363 2364 case ZFS_PROP_REFRATIO: 2365 case ZFS_PROP_COMPRESSRATIO: 2366 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2367 return (-1); 2368 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2369 (u_longlong_t)(val / 100), 2370 (u_longlong_t)(val % 100)); 2371 break; 2372 2373 case ZFS_PROP_TYPE: 2374 switch (zhp->zfs_type) { 2375 case ZFS_TYPE_FILESYSTEM: 2376 str = "filesystem"; 2377 break; 2378 case ZFS_TYPE_VOLUME: 2379 str = "volume"; 2380 break; 2381 case ZFS_TYPE_SNAPSHOT: 2382 str = "snapshot"; 2383 break; 2384 case ZFS_TYPE_BOOKMARK: 2385 str = "bookmark"; 2386 break; 2387 default: 2388 abort(); 2389 } 2390 (void) snprintf(propbuf, proplen, "%s", str); 2391 break; 2392 2393 case ZFS_PROP_MOUNTED: 2394 /* 2395 * The 'mounted' property is a pseudo-property that described 2396 * whether the filesystem is currently mounted. Even though 2397 * it's a boolean value, the typical values of "on" and "off" 2398 * don't make sense, so we translate to "yes" and "no". 2399 */ 2400 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2401 src, &source, &val) != 0) 2402 return (-1); 2403 if (val) 2404 (void) strlcpy(propbuf, "yes", proplen); 2405 else 2406 (void) strlcpy(propbuf, "no", proplen); 2407 break; 2408 2409 case ZFS_PROP_NAME: 2410 /* 2411 * The 'name' property is a pseudo-property derived from the 2412 * dataset name. It is presented as a real property to simplify 2413 * consumers. 2414 */ 2415 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2416 break; 2417 2418 case ZFS_PROP_MLSLABEL: 2419 { 2420#ifdef sun 2421 m_label_t *new_sl = NULL; 2422 char *ascii = NULL; /* human readable label */ 2423 2424 (void) strlcpy(propbuf, 2425 getprop_string(zhp, prop, &source), proplen); 2426 2427 if (literal || (strcasecmp(propbuf, 2428 ZFS_MLSLABEL_DEFAULT) == 0)) 2429 break; 2430 2431 /* 2432 * Try to translate the internal hex string to 2433 * human-readable output. If there are any 2434 * problems just use the hex string. 2435 */ 2436 2437 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2438 L_NO_CORRECTION, NULL) == -1) { 2439 m_label_free(new_sl); 2440 break; 2441 } 2442 2443 if (label_to_str(new_sl, &ascii, M_LABEL, 2444 DEF_NAMES) != 0) { 2445 if (ascii) 2446 free(ascii); 2447 m_label_free(new_sl); 2448 break; 2449 } 2450 m_label_free(new_sl); 2451 2452 (void) strlcpy(propbuf, ascii, proplen); 2453 free(ascii); 2454#else /* !sun */ 2455 propbuf[0] = '\0'; 2456#endif /* !sun */ 2457 } 2458 break; 2459 2460 case ZFS_PROP_GUID: 2461 /* 2462 * GUIDs are stored as numbers, but they are identifiers. 2463 * We don't want them to be pretty printed, because pretty 2464 * printing mangles the ID into a truncated and useless value. 2465 */ 2466 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2467 return (-1); 2468 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2469 break; 2470 2471 default: 2472 switch (zfs_prop_get_type(prop)) { 2473 case PROP_TYPE_NUMBER: 2474 if (get_numeric_property(zhp, prop, src, 2475 &source, &val) != 0) 2476 return (-1); 2477 if (literal) 2478 (void) snprintf(propbuf, proplen, "%llu", 2479 (u_longlong_t)val); 2480 else 2481 zfs_nicenum(val, propbuf, proplen); 2482 break; 2483 2484 case PROP_TYPE_STRING: 2485 (void) strlcpy(propbuf, 2486 getprop_string(zhp, prop, &source), proplen); 2487 break; 2488 2489 case PROP_TYPE_INDEX: 2490 if (get_numeric_property(zhp, prop, src, 2491 &source, &val) != 0) 2492 return (-1); 2493 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2494 return (-1); 2495 (void) strlcpy(propbuf, strval, proplen); 2496 break; 2497 2498 default: 2499 abort(); 2500 } 2501 } 2502 2503 get_source(zhp, src, source, statbuf, statlen); 2504 2505 return (0); 2506} 2507 2508/* 2509 * Utility function to get the given numeric property. Does no validation that 2510 * the given property is the appropriate type; should only be used with 2511 * hard-coded property types. 2512 */ 2513uint64_t 2514zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2515{ 2516 char *source; 2517 uint64_t val; 2518 2519 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2520 2521 return (val); 2522} 2523 2524int 2525zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2526{ 2527 char buf[64]; 2528 2529 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2530 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2531} 2532 2533/* 2534 * Similar to zfs_prop_get(), but returns the value as an integer. 2535 */ 2536int 2537zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2538 zprop_source_t *src, char *statbuf, size_t statlen) 2539{ 2540 char *source; 2541 2542 /* 2543 * Check to see if this property applies to our object 2544 */ 2545 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2546 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2547 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2548 zfs_prop_to_name(prop))); 2549 } 2550 2551 if (src) 2552 *src = ZPROP_SRC_NONE; 2553 2554 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2555 return (-1); 2556 2557 get_source(zhp, src, source, statbuf, statlen); 2558 2559 return (0); 2560} 2561 2562static int 2563idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2564 char **domainp, idmap_rid_t *ridp) 2565{ 2566#ifdef sun 2567 idmap_get_handle_t *get_hdl = NULL; 2568 idmap_stat status; 2569 int err = EINVAL; 2570 2571 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2572 goto out; 2573 2574 if (isuser) { 2575 err = idmap_get_sidbyuid(get_hdl, id, 2576 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2577 } else { 2578 err = idmap_get_sidbygid(get_hdl, id, 2579 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2580 } 2581 if (err == IDMAP_SUCCESS && 2582 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2583 status == IDMAP_SUCCESS) 2584 err = 0; 2585 else 2586 err = EINVAL; 2587out: 2588 if (get_hdl) 2589 idmap_get_destroy(get_hdl); 2590 return (err); 2591#else /* !sun */ 2592 assert(!"invalid code path"); 2593 return (EINVAL); // silence compiler warning 2594#endif /* !sun */ 2595} 2596 2597/* 2598 * convert the propname into parameters needed by kernel 2599 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2600 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2601 */ 2602static int 2603userquota_propname_decode(const char *propname, boolean_t zoned, 2604 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2605{ 2606 zfs_userquota_prop_t type; 2607 char *cp, *end; 2608 char *numericsid = NULL; 2609 boolean_t isuser; 2610 2611 domain[0] = '\0'; 2612 2613 /* Figure out the property type ({user|group}{quota|space}) */ 2614 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2615 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2616 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2617 break; 2618 } 2619 if (type == ZFS_NUM_USERQUOTA_PROPS) 2620 return (EINVAL); 2621 *typep = type; 2622 2623 isuser = (type == ZFS_PROP_USERQUOTA || 2624 type == ZFS_PROP_USERUSED); 2625 2626 cp = strchr(propname, '@') + 1; 2627 2628 if (strchr(cp, '@')) { 2629#ifdef sun 2630 /* 2631 * It's a SID name (eg "user@domain") that needs to be 2632 * turned into S-1-domainID-RID. 2633 */ 2634 directory_error_t e; 2635 if (zoned && getzoneid() == GLOBAL_ZONEID) 2636 return (ENOENT); 2637 if (isuser) { 2638 e = directory_sid_from_user_name(NULL, 2639 cp, &numericsid); 2640 } else { 2641 e = directory_sid_from_group_name(NULL, 2642 cp, &numericsid); 2643 } 2644 if (e != NULL) { 2645 directory_error_free(e); 2646 return (ENOENT); 2647 } 2648 if (numericsid == NULL) 2649 return (ENOENT); 2650 cp = numericsid; 2651 /* will be further decoded below */ 2652#else /* !sun */ 2653 return (ENOENT); 2654#endif /* !sun */ 2655 } 2656 2657 if (strncmp(cp, "S-1-", 4) == 0) { 2658 /* It's a numeric SID (eg "S-1-234-567-89") */ 2659 (void) strlcpy(domain, cp, domainlen); 2660 cp = strrchr(domain, '-'); 2661 *cp = '\0'; 2662 cp++; 2663 2664 errno = 0; 2665 *ridp = strtoull(cp, &end, 10); 2666 if (numericsid) { 2667 free(numericsid); 2668 numericsid = NULL; 2669 } 2670 if (errno != 0 || *end != '\0') 2671 return (EINVAL); 2672 } else if (!isdigit(*cp)) { 2673 /* 2674 * It's a user/group name (eg "user") that needs to be 2675 * turned into a uid/gid 2676 */ 2677 if (zoned && getzoneid() == GLOBAL_ZONEID) 2678 return (ENOENT); 2679 if (isuser) { 2680 struct passwd *pw; 2681 pw = getpwnam(cp); 2682 if (pw == NULL) 2683 return (ENOENT); 2684 *ridp = pw->pw_uid; 2685 } else { 2686 struct group *gr; 2687 gr = getgrnam(cp); 2688 if (gr == NULL) 2689 return (ENOENT); 2690 *ridp = gr->gr_gid; 2691 } 2692 } else { 2693 /* It's a user/group ID (eg "12345"). */ 2694 uid_t id = strtoul(cp, &end, 10); 2695 idmap_rid_t rid; 2696 char *mapdomain; 2697 2698 if (*end != '\0') 2699 return (EINVAL); 2700 if (id > MAXUID) { 2701 /* It's an ephemeral ID. */ 2702 if (idmap_id_to_numeric_domain_rid(id, isuser, 2703 &mapdomain, &rid) != 0) 2704 return (ENOENT); 2705 (void) strlcpy(domain, mapdomain, domainlen); 2706 *ridp = rid; 2707 } else { 2708 *ridp = id; 2709 } 2710 } 2711 2712 ASSERT3P(numericsid, ==, NULL); 2713 return (0); 2714} 2715 2716static int 2717zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2718 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2719{ 2720 int err; 2721 zfs_cmd_t zc = { 0 }; 2722 2723 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2724 2725 err = userquota_propname_decode(propname, 2726 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2727 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2728 zc.zc_objset_type = *typep; 2729 if (err) 2730 return (err); 2731 2732 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2733 if (err) 2734 return (err); 2735 2736 *propvalue = zc.zc_cookie; 2737 return (0); 2738} 2739 2740int 2741zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2742 uint64_t *propvalue) 2743{ 2744 zfs_userquota_prop_t type; 2745 2746 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2747 &type)); 2748} 2749 2750int 2751zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2752 char *propbuf, int proplen, boolean_t literal) 2753{ 2754 int err; 2755 uint64_t propvalue; 2756 zfs_userquota_prop_t type; 2757 2758 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2759 &type); 2760 2761 if (err) 2762 return (err); 2763 2764 if (literal) { 2765 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2766 } else if (propvalue == 0 && 2767 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2768 (void) strlcpy(propbuf, "none", proplen); 2769 } else { 2770 zfs_nicenum(propvalue, propbuf, proplen); 2771 } 2772 return (0); 2773} 2774 2775int 2776zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2777 uint64_t *propvalue) 2778{ 2779 int err; 2780 zfs_cmd_t zc = { 0 }; 2781 const char *snapname; 2782 2783 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2784 2785 snapname = strchr(propname, '@') + 1; 2786 if (strchr(snapname, '@')) { 2787 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2788 } else { 2789 /* snapname is the short name, append it to zhp's fsname */ 2790 char *cp; 2791 2792 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2793 sizeof (zc.zc_value)); 2794 cp = strchr(zc.zc_value, '@'); 2795 if (cp != NULL) 2796 *cp = '\0'; 2797 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2798 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2799 } 2800 2801 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2802 if (err) 2803 return (err); 2804 2805 *propvalue = zc.zc_cookie; 2806 return (0); 2807} 2808 2809int 2810zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2811 char *propbuf, int proplen, boolean_t literal) 2812{ 2813 int err; 2814 uint64_t propvalue; 2815 2816 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2817 2818 if (err) 2819 return (err); 2820 2821 if (literal) { 2822 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2823 } else { 2824 zfs_nicenum(propvalue, propbuf, proplen); 2825 } 2826 return (0); 2827} 2828 2829/* 2830 * Returns the name of the given zfs handle. 2831 */ 2832const char * 2833zfs_get_name(const zfs_handle_t *zhp) 2834{ 2835 return (zhp->zfs_name); 2836} 2837 2838/* 2839 * Returns the type of the given zfs handle. 2840 */ 2841zfs_type_t 2842zfs_get_type(const zfs_handle_t *zhp) 2843{ 2844 return (zhp->zfs_type); 2845} 2846 2847/* 2848 * Is one dataset name a child dataset of another? 2849 * 2850 * Needs to handle these cases: 2851 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2852 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2853 * Descendant? No. No. No. Yes. 2854 */ 2855static boolean_t 2856is_descendant(const char *ds1, const char *ds2) 2857{ 2858 size_t d1len = strlen(ds1); 2859 2860 /* ds2 can't be a descendant if it's smaller */ 2861 if (strlen(ds2) < d1len) 2862 return (B_FALSE); 2863 2864 /* otherwise, compare strings and verify that there's a '/' char */ 2865 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2866} 2867 2868/* 2869 * Given a complete name, return just the portion that refers to the parent. 2870 * Will return -1 if there is no parent (path is just the name of the 2871 * pool). 2872 */ 2873static int 2874parent_name(const char *path, char *buf, size_t buflen) 2875{ 2876 char *slashp; 2877 2878 (void) strlcpy(buf, path, buflen); 2879 2880 if ((slashp = strrchr(buf, '/')) == NULL) 2881 return (-1); 2882 *slashp = '\0'; 2883 2884 return (0); 2885} 2886 2887/* 2888 * If accept_ancestor is false, then check to make sure that the given path has 2889 * a parent, and that it exists. If accept_ancestor is true, then find the 2890 * closest existing ancestor for the given path. In prefixlen return the 2891 * length of already existing prefix of the given path. We also fetch the 2892 * 'zoned' property, which is used to validate property settings when creating 2893 * new datasets. 2894 */ 2895static int 2896check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 2897 boolean_t accept_ancestor, int *prefixlen) 2898{ 2899 zfs_cmd_t zc = { 0 }; 2900 char parent[ZFS_MAXNAMELEN]; 2901 char *slash; 2902 zfs_handle_t *zhp; 2903 char errbuf[1024]; 2904 uint64_t is_zoned; 2905 2906 (void) snprintf(errbuf, sizeof (errbuf), 2907 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 2908 2909 /* get parent, and check to see if this is just a pool */ 2910 if (parent_name(path, parent, sizeof (parent)) != 0) { 2911 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2912 "missing dataset name")); 2913 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 2914 } 2915 2916 /* check to see if the pool exists */ 2917 if ((slash = strchr(parent, '/')) == NULL) 2918 slash = parent + strlen(parent); 2919 (void) strncpy(zc.zc_name, parent, slash - parent); 2920 zc.zc_name[slash - parent] = '\0'; 2921 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 2922 errno == ENOENT) { 2923 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2924 "no such pool '%s'"), zc.zc_name); 2925 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2926 } 2927 2928 /* check to see if the parent dataset exists */ 2929 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 2930 if (errno == ENOENT && accept_ancestor) { 2931 /* 2932 * Go deeper to find an ancestor, give up on top level. 2933 */ 2934 if (parent_name(parent, parent, sizeof (parent)) != 0) { 2935 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2936 "no such pool '%s'"), zc.zc_name); 2937 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2938 } 2939 } else if (errno == ENOENT) { 2940 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2941 "parent does not exist")); 2942 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2943 } else 2944 return (zfs_standard_error(hdl, errno, errbuf)); 2945 } 2946 2947 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 2948 if (zoned != NULL) 2949 *zoned = is_zoned; 2950 2951 /* we are in a non-global zone, but parent is in the global zone */ 2952 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 2953 (void) zfs_standard_error(hdl, EPERM, errbuf); 2954 zfs_close(zhp); 2955 return (-1); 2956 } 2957 2958 /* make sure parent is a filesystem */ 2959 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 2960 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2961 "parent is not a filesystem")); 2962 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 2963 zfs_close(zhp); 2964 return (-1); 2965 } 2966 2967 zfs_close(zhp); 2968 if (prefixlen != NULL) 2969 *prefixlen = strlen(parent); 2970 return (0); 2971} 2972 2973/* 2974 * Finds whether the dataset of the given type(s) exists. 2975 */ 2976boolean_t 2977zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 2978{ 2979 zfs_handle_t *zhp; 2980 2981 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 2982 return (B_FALSE); 2983 2984 /* 2985 * Try to get stats for the dataset, which will tell us if it exists. 2986 */ 2987 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 2988 int ds_type = zhp->zfs_type; 2989 2990 zfs_close(zhp); 2991 if (types & ds_type) 2992 return (B_TRUE); 2993 } 2994 return (B_FALSE); 2995} 2996 2997/* 2998 * Given a path to 'target', create all the ancestors between 2999 * the prefixlen portion of the path, and the target itself. 3000 * Fail if the initial prefixlen-ancestor does not already exist. 3001 */ 3002int 3003create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3004{ 3005 zfs_handle_t *h; 3006 char *cp; 3007 const char *opname; 3008 3009 /* make sure prefix exists */ 3010 cp = target + prefixlen; 3011 if (*cp != '/') { 3012 assert(strchr(cp, '/') == NULL); 3013 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3014 } else { 3015 *cp = '\0'; 3016 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3017 *cp = '/'; 3018 } 3019 if (h == NULL) 3020 return (-1); 3021 zfs_close(h); 3022 3023 /* 3024 * Attempt to create, mount, and share any ancestor filesystems, 3025 * up to the prefixlen-long one. 3026 */ 3027 for (cp = target + prefixlen + 1; 3028 cp = strchr(cp, '/'); *cp = '/', cp++) { 3029 3030 *cp = '\0'; 3031 3032 h = make_dataset_handle(hdl, target); 3033 if (h) { 3034 /* it already exists, nothing to do here */ 3035 zfs_close(h); 3036 continue; 3037 } 3038 3039 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3040 NULL) != 0) { 3041 opname = dgettext(TEXT_DOMAIN, "create"); 3042 goto ancestorerr; 3043 } 3044 3045 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3046 if (h == NULL) { 3047 opname = dgettext(TEXT_DOMAIN, "open"); 3048 goto ancestorerr; 3049 } 3050 3051 if (zfs_mount(h, NULL, 0) != 0) { 3052 opname = dgettext(TEXT_DOMAIN, "mount"); 3053 goto ancestorerr; 3054 } 3055 3056 if (zfs_share(h) != 0) { 3057 opname = dgettext(TEXT_DOMAIN, "share"); 3058 goto ancestorerr; 3059 } 3060 3061 zfs_close(h); 3062 } 3063 3064 return (0); 3065 3066ancestorerr: 3067 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3068 "failed to %s ancestor '%s'"), opname, target); 3069 return (-1); 3070} 3071 3072/* 3073 * Creates non-existing ancestors of the given path. 3074 */ 3075int 3076zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3077{ 3078 int prefix; 3079 char *path_copy; 3080 int rc; 3081 3082 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3083 return (-1); 3084 3085 if ((path_copy = strdup(path)) != NULL) { 3086 rc = create_parents(hdl, path_copy, prefix); 3087 free(path_copy); 3088 } 3089 if (path_copy == NULL || rc != 0) 3090 return (-1); 3091 3092 return (0); 3093} 3094 3095/* 3096 * Create a new filesystem or volume. 3097 */ 3098int 3099zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3100 nvlist_t *props) 3101{ 3102 int ret; 3103 uint64_t size = 0; 3104 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3105 char errbuf[1024]; 3106 uint64_t zoned; 3107 dmu_objset_type_t ost; 3108 3109 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3110 "cannot create '%s'"), path); 3111 3112 /* validate the path, taking care to note the extended error message */ 3113 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3114 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3115 3116 /* validate parents exist */ 3117 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3118 return (-1); 3119 3120 /* 3121 * The failure modes when creating a dataset of a different type over 3122 * one that already exists is a little strange. In particular, if you 3123 * try to create a dataset on top of an existing dataset, the ioctl() 3124 * will return ENOENT, not EEXIST. To prevent this from happening, we 3125 * first try to see if the dataset exists. 3126 */ 3127 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3128 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3129 "dataset already exists")); 3130 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3131 } 3132 3133 if (type == ZFS_TYPE_VOLUME) 3134 ost = DMU_OST_ZVOL; 3135 else 3136 ost = DMU_OST_ZFS; 3137 3138 if (props && (props = zfs_valid_proplist(hdl, type, props, 3139 zoned, NULL, errbuf)) == 0) 3140 return (-1); 3141 3142 if (type == ZFS_TYPE_VOLUME) { 3143 /* 3144 * If we are creating a volume, the size and block size must 3145 * satisfy a few restraints. First, the blocksize must be a 3146 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3147 * volsize must be a multiple of the block size, and cannot be 3148 * zero. 3149 */ 3150 if (props == NULL || nvlist_lookup_uint64(props, 3151 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3152 nvlist_free(props); 3153 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3154 "missing volume size")); 3155 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3156 } 3157 3158 if ((ret = nvlist_lookup_uint64(props, 3159 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3160 &blocksize)) != 0) { 3161 if (ret == ENOENT) { 3162 blocksize = zfs_prop_default_numeric( 3163 ZFS_PROP_VOLBLOCKSIZE); 3164 } else { 3165 nvlist_free(props); 3166 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3167 "missing volume block size")); 3168 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3169 } 3170 } 3171 3172 if (size == 0) { 3173 nvlist_free(props); 3174 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3175 "volume size cannot be zero")); 3176 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3177 } 3178 3179 if (size % blocksize != 0) { 3180 nvlist_free(props); 3181 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3182 "volume size must be a multiple of volume block " 3183 "size")); 3184 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3185 } 3186 } 3187 3188 /* create the dataset */ 3189 ret = lzc_create(path, ost, props); 3190 nvlist_free(props); 3191 3192 /* check for failure */ 3193 if (ret != 0) { 3194 char parent[ZFS_MAXNAMELEN]; 3195 (void) parent_name(path, parent, sizeof (parent)); 3196 3197 switch (errno) { 3198 case ENOENT: 3199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3200 "no such parent '%s'"), parent); 3201 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3202 3203 case EINVAL: 3204 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3205 "parent '%s' is not a filesystem"), parent); 3206 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3207 3208 case EDOM: 3209 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3210 "volume block size must be power of 2 from " 3211 "512B to 128KB")); 3212 3213 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3214 3215 case ENOTSUP: 3216 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3217 "pool must be upgraded to set this " 3218 "property or value")); 3219 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3220#ifdef _ILP32 3221 case EOVERFLOW: 3222 /* 3223 * This platform can't address a volume this big. 3224 */ 3225 if (type == ZFS_TYPE_VOLUME) 3226 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3227 errbuf)); 3228#endif 3229 /* FALLTHROUGH */ 3230 default: 3231 return (zfs_standard_error(hdl, errno, errbuf)); 3232 } 3233 } 3234 3235 return (0); 3236} 3237 3238/* 3239 * Destroys the given dataset. The caller must make sure that the filesystem 3240 * isn't mounted, and that there are no active dependents. If the file system 3241 * does not exist this function does nothing. 3242 */ 3243int 3244zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3245{ 3246 zfs_cmd_t zc = { 0 }; 3247 3248 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3249 nvlist_t *nv = fnvlist_alloc(); 3250 fnvlist_add_boolean(nv, zhp->zfs_name); 3251 int error = lzc_destroy_bookmarks(nv, NULL); 3252 fnvlist_free(nv); 3253 if (error != 0) { 3254 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3255 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3256 zhp->zfs_name)); 3257 } 3258 return (0); 3259 } 3260 3261 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3262 3263 if (ZFS_IS_VOLUME(zhp)) { 3264 zc.zc_objset_type = DMU_OST_ZVOL; 3265 } else { 3266 zc.zc_objset_type = DMU_OST_ZFS; 3267 } 3268 3269 zc.zc_defer_destroy = defer; 3270 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3271 errno != ENOENT) { 3272 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3273 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3274 zhp->zfs_name)); 3275 } 3276 3277 remove_mountpoint(zhp); 3278 3279 return (0); 3280} 3281 3282struct destroydata { 3283 nvlist_t *nvl; 3284 const char *snapname; 3285}; 3286 3287static int 3288zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3289{ 3290 struct destroydata *dd = arg; 3291 char name[ZFS_MAXNAMELEN]; 3292 int rv = 0; 3293 3294 (void) snprintf(name, sizeof (name), 3295 "%s@%s", zhp->zfs_name, dd->snapname); 3296 3297 if (lzc_exists(name)) 3298 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3299 3300 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3301 zfs_close(zhp); 3302 return (rv); 3303} 3304 3305/* 3306 * Destroys all snapshots with the given name in zhp & descendants. 3307 */ 3308int 3309zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3310{ 3311 int ret; 3312 struct destroydata dd = { 0 }; 3313 3314 dd.snapname = snapname; 3315 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3316 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3317 3318 if (nvlist_empty(dd.nvl)) { 3319 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3320 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3321 zhp->zfs_name, snapname); 3322 } else { 3323 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3324 } 3325 nvlist_free(dd.nvl); 3326 return (ret); 3327} 3328 3329/* 3330 * Destroys all the snapshots named in the nvlist. 3331 */ 3332int 3333zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3334{ 3335 int ret; 3336 nvlist_t *errlist; 3337 3338 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3339 3340 if (ret == 0) 3341 return (0); 3342 3343 if (nvlist_empty(errlist)) { 3344 char errbuf[1024]; 3345 (void) snprintf(errbuf, sizeof (errbuf), 3346 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3347 3348 ret = zfs_standard_error(hdl, ret, errbuf); 3349 } 3350 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3351 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3352 char errbuf[1024]; 3353 (void) snprintf(errbuf, sizeof (errbuf), 3354 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3355 nvpair_name(pair)); 3356 3357 switch (fnvpair_value_int32(pair)) { 3358 case EEXIST: 3359 zfs_error_aux(hdl, 3360 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3361 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3362 break; 3363 default: 3364 ret = zfs_standard_error(hdl, errno, errbuf); 3365 break; 3366 } 3367 } 3368 3369 return (ret); 3370} 3371 3372/* 3373 * Clones the given dataset. The target must be of the same type as the source. 3374 */ 3375int 3376zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3377{ 3378 char parent[ZFS_MAXNAMELEN]; 3379 int ret; 3380 char errbuf[1024]; 3381 libzfs_handle_t *hdl = zhp->zfs_hdl; 3382 uint64_t zoned; 3383 3384 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3385 3386 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3387 "cannot create '%s'"), target); 3388 3389 /* validate the target/clone name */ 3390 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3391 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3392 3393 /* validate parents exist */ 3394 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3395 return (-1); 3396 3397 (void) parent_name(target, parent, sizeof (parent)); 3398 3399 /* do the clone */ 3400 3401 if (props) { 3402 zfs_type_t type; 3403 if (ZFS_IS_VOLUME(zhp)) { 3404 type = ZFS_TYPE_VOLUME; 3405 } else { 3406 type = ZFS_TYPE_FILESYSTEM; 3407 } 3408 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3409 zhp, errbuf)) == NULL) 3410 return (-1); 3411 } 3412 3413 ret = lzc_clone(target, zhp->zfs_name, props); 3414 nvlist_free(props); 3415 3416 if (ret != 0) { 3417 switch (errno) { 3418 3419 case ENOENT: 3420 /* 3421 * The parent doesn't exist. We should have caught this 3422 * above, but there may a race condition that has since 3423 * destroyed the parent. 3424 * 3425 * At this point, we don't know whether it's the source 3426 * that doesn't exist anymore, or whether the target 3427 * dataset doesn't exist. 3428 */ 3429 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3430 "no such parent '%s'"), parent); 3431 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3432 3433 case EXDEV: 3434 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3435 "source and target pools differ")); 3436 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3437 errbuf)); 3438 3439 default: 3440 return (zfs_standard_error(zhp->zfs_hdl, errno, 3441 errbuf)); 3442 } 3443 } 3444 3445 return (ret); 3446} 3447 3448/* 3449 * Promotes the given clone fs to be the clone parent. 3450 */ 3451int 3452zfs_promote(zfs_handle_t *zhp) 3453{ 3454 libzfs_handle_t *hdl = zhp->zfs_hdl; 3455 zfs_cmd_t zc = { 0 }; 3456 char parent[MAXPATHLEN]; 3457 int ret; 3458 char errbuf[1024]; 3459 3460 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3461 "cannot promote '%s'"), zhp->zfs_name); 3462 3463 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3464 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3465 "snapshots can not be promoted")); 3466 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3467 } 3468 3469 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3470 if (parent[0] == '\0') { 3471 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3472 "not a cloned filesystem")); 3473 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3474 } 3475 3476 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3477 sizeof (zc.zc_value)); 3478 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3479 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3480 3481 if (ret != 0) { 3482 int save_errno = errno; 3483 3484 switch (save_errno) { 3485 case EEXIST: 3486 /* There is a conflicting snapshot name. */ 3487 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3488 "conflicting snapshot '%s' from parent '%s'"), 3489 zc.zc_string, parent); 3490 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3491 3492 default: 3493 return (zfs_standard_error(hdl, save_errno, errbuf)); 3494 } 3495 } 3496 return (ret); 3497} 3498 3499typedef struct snapdata { 3500 nvlist_t *sd_nvl; 3501 const char *sd_snapname; 3502} snapdata_t; 3503 3504static int 3505zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3506{ 3507 snapdata_t *sd = arg; 3508 char name[ZFS_MAXNAMELEN]; 3509 int rv = 0; 3510 3511 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3512 (void) snprintf(name, sizeof (name), 3513 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3514 3515 fnvlist_add_boolean(sd->sd_nvl, name); 3516 3517 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3518 } 3519 zfs_close(zhp); 3520 3521 return (rv); 3522} 3523 3524/* 3525 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3526 * created. 3527 */ 3528int 3529zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3530{ 3531 int ret; 3532 char errbuf[1024]; 3533 nvpair_t *elem; 3534 nvlist_t *errors; 3535 3536 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3537 "cannot create snapshots ")); 3538 3539 elem = NULL; 3540 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3541 const char *snapname = nvpair_name(elem); 3542 3543 /* validate the target name */ 3544 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3545 B_TRUE)) { 3546 (void) snprintf(errbuf, sizeof (errbuf), 3547 dgettext(TEXT_DOMAIN, 3548 "cannot create snapshot '%s'"), snapname); 3549 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3550 } 3551 } 3552 3553 if (props != NULL && 3554 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3555 props, B_FALSE, NULL, errbuf)) == NULL) { 3556 return (-1); 3557 } 3558 3559 ret = lzc_snapshot(snaps, props, &errors); 3560 3561 if (ret != 0) { 3562 boolean_t printed = B_FALSE; 3563 for (elem = nvlist_next_nvpair(errors, NULL); 3564 elem != NULL; 3565 elem = nvlist_next_nvpair(errors, elem)) { 3566 (void) snprintf(errbuf, sizeof (errbuf), 3567 dgettext(TEXT_DOMAIN, 3568 "cannot create snapshot '%s'"), nvpair_name(elem)); 3569 (void) zfs_standard_error(hdl, 3570 fnvpair_value_int32(elem), errbuf); 3571 printed = B_TRUE; 3572 } 3573 if (!printed) { 3574 switch (ret) { 3575 case EXDEV: 3576 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3577 "multiple snapshots of same " 3578 "fs not allowed")); 3579 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3580 3581 break; 3582 default: 3583 (void) zfs_standard_error(hdl, ret, errbuf); 3584 } 3585 } 3586 } 3587 3588 nvlist_free(props); 3589 nvlist_free(errors); 3590 return (ret); 3591} 3592 3593int 3594zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3595 nvlist_t *props) 3596{ 3597 int ret; 3598 snapdata_t sd = { 0 }; 3599 char fsname[ZFS_MAXNAMELEN]; 3600 char *cp; 3601 zfs_handle_t *zhp; 3602 char errbuf[1024]; 3603 3604 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3605 "cannot snapshot %s"), path); 3606 3607 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3608 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3609 3610 (void) strlcpy(fsname, path, sizeof (fsname)); 3611 cp = strchr(fsname, '@'); 3612 *cp = '\0'; 3613 sd.sd_snapname = cp + 1; 3614 3615 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3616 ZFS_TYPE_VOLUME)) == NULL) { 3617 return (-1); 3618 } 3619 3620 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3621 if (recursive) { 3622 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3623 } else { 3624 fnvlist_add_boolean(sd.sd_nvl, path); 3625 } 3626 3627 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3628 nvlist_free(sd.sd_nvl); 3629 zfs_close(zhp); 3630 return (ret); 3631} 3632 3633/* 3634 * Destroy any more recent snapshots. We invoke this callback on any dependents 3635 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3636 * is a dependent and we should just destroy it without checking the transaction 3637 * group. 3638 */ 3639typedef struct rollback_data { 3640 const char *cb_target; /* the snapshot */ 3641 uint64_t cb_create; /* creation time reference */ 3642 boolean_t cb_error; 3643 boolean_t cb_force; 3644} rollback_data_t; 3645 3646static int 3647rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3648{ 3649 rollback_data_t *cbp = data; 3650 prop_changelist_t *clp; 3651 3652 /* We must destroy this clone; first unmount it */ 3653 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3654 cbp->cb_force ? MS_FORCE: 0); 3655 if (clp == NULL || changelist_prefix(clp) != 0) { 3656 cbp->cb_error = B_TRUE; 3657 zfs_close(zhp); 3658 return (0); 3659 } 3660 if (zfs_destroy(zhp, B_FALSE) != 0) 3661 cbp->cb_error = B_TRUE; 3662 else 3663 changelist_remove(clp, zhp->zfs_name); 3664 (void) changelist_postfix(clp); 3665 changelist_free(clp); 3666 3667 zfs_close(zhp); 3668 return (0); 3669} 3670 3671static int 3672rollback_destroy(zfs_handle_t *zhp, void *data) 3673{ 3674 rollback_data_t *cbp = data; 3675 3676 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3677 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3678 rollback_destroy_dependent, cbp); 3679 3680 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3681 } 3682 3683 zfs_close(zhp); 3684 return (0); 3685} 3686 3687/* 3688 * Given a dataset, rollback to a specific snapshot, discarding any 3689 * data changes since then and making it the active dataset. 3690 * 3691 * Any snapshots and bookmarks more recent than the target are 3692 * destroyed, along with their dependents (i.e. clones). 3693 */ 3694int 3695zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3696{ 3697 rollback_data_t cb = { 0 }; 3698 int err; 3699 boolean_t restore_resv = 0; 3700 uint64_t old_volsize, new_volsize; 3701 zfs_prop_t resv_prop; 3702 3703 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3704 zhp->zfs_type == ZFS_TYPE_VOLUME); 3705 3706 /* 3707 * Destroy all recent snapshots and their dependents. 3708 */ 3709 cb.cb_force = force; 3710 cb.cb_target = snap->zfs_name; 3711 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3712 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3713 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3714 3715 if (cb.cb_error) 3716 return (-1); 3717 3718 /* 3719 * Now that we have verified that the snapshot is the latest, 3720 * rollback to the given snapshot. 3721 */ 3722 3723 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3724 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3725 return (-1); 3726 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3727 restore_resv = 3728 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3729 } 3730 3731 /* 3732 * We rely on zfs_iter_children() to verify that there are no 3733 * newer snapshots for the given dataset. Therefore, we can 3734 * simply pass the name on to the ioctl() call. There is still 3735 * an unlikely race condition where the user has taken a 3736 * snapshot since we verified that this was the most recent. 3737 */ 3738 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3739 if (err != 0) { 3740 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3741 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3742 zhp->zfs_name); 3743 return (err); 3744 } 3745 3746 /* 3747 * For volumes, if the pre-rollback volsize matched the pre- 3748 * rollback reservation and the volsize has changed then set 3749 * the reservation property to the post-rollback volsize. 3750 * Make a new handle since the rollback closed the dataset. 3751 */ 3752 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3753 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3754 if (restore_resv) { 3755 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3756 if (old_volsize != new_volsize) 3757 err = zfs_prop_set_int(zhp, resv_prop, 3758 new_volsize); 3759 } 3760 zfs_close(zhp); 3761 } 3762 return (err); 3763} 3764 3765/* 3766 * Renames the given dataset. 3767 */ 3768int 3769zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3770 renameflags_t flags) 3771{ 3772 int ret; 3773 zfs_cmd_t zc = { 0 }; 3774 char *delim; 3775 prop_changelist_t *cl = NULL; 3776 zfs_handle_t *zhrp = NULL; 3777 char *parentname = NULL; 3778 char parent[ZFS_MAXNAMELEN]; 3779 char property[ZFS_MAXPROPLEN]; 3780 libzfs_handle_t *hdl = zhp->zfs_hdl; 3781 char errbuf[1024]; 3782 3783 /* if we have the same exact name, just return success */ 3784 if (strcmp(zhp->zfs_name, target) == 0) 3785 return (0); 3786 3787 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3788 "cannot rename to '%s'"), target); 3789 3790 if (source != NULL) { 3791 /* 3792 * This is recursive snapshots rename, put snapshot name 3793 * (that might not exist) into zfs_name. 3794 */ 3795 assert(flags.recurse); 3796 3797 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3798 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3799 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3800 } 3801 3802 /* 3803 * Make sure the target name is valid 3804 */ 3805 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3806 if ((strchr(target, '@') == NULL) || 3807 *target == '@') { 3808 /* 3809 * Snapshot target name is abbreviated, 3810 * reconstruct full dataset name 3811 */ 3812 (void) strlcpy(parent, zhp->zfs_name, 3813 sizeof (parent)); 3814 delim = strchr(parent, '@'); 3815 if (strchr(target, '@') == NULL) 3816 *(++delim) = '\0'; 3817 else 3818 *delim = '\0'; 3819 (void) strlcat(parent, target, sizeof (parent)); 3820 target = parent; 3821 } else { 3822 /* 3823 * Make sure we're renaming within the same dataset. 3824 */ 3825 delim = strchr(target, '@'); 3826 if (strncmp(zhp->zfs_name, target, delim - target) 3827 != 0 || zhp->zfs_name[delim - target] != '@') { 3828 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3829 "snapshots must be part of same " 3830 "dataset")); 3831 return (zfs_error(hdl, EZFS_CROSSTARGET, 3832 errbuf)); 3833 } 3834 } 3835 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3836 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3837 } else { 3838 if (flags.recurse) { 3839 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3840 "recursive rename must be a snapshot")); 3841 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3842 } 3843 3844 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3845 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3846 3847 /* validate parents */ 3848 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3849 return (-1); 3850 3851 /* make sure we're in the same pool */ 3852 verify((delim = strchr(target, '/')) != NULL); 3853 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3854 zhp->zfs_name[delim - target] != '/') { 3855 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3856 "datasets must be within same pool")); 3857 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3858 } 3859 3860 /* new name cannot be a child of the current dataset name */ 3861 if (is_descendant(zhp->zfs_name, target)) { 3862 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3863 "New dataset name cannot be a descendant of " 3864 "current dataset name")); 3865 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3866 } 3867 } 3868 3869 (void) snprintf(errbuf, sizeof (errbuf), 3870 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 3871 3872 if (getzoneid() == GLOBAL_ZONEID && 3873 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 3874 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3875 "dataset is used in a non-global zone")); 3876 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 3877 } 3878 3879 /* 3880 * Avoid unmounting file systems with mountpoint property set to 3881 * 'legacy' or 'none' even if -u option is not given. 3882 */ 3883 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 3884 !flags.recurse && !flags.nounmount && 3885 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 3886 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 3887 (strcmp(property, "legacy") == 0 || 3888 strcmp(property, "none") == 0)) { 3889 flags.nounmount = B_TRUE; 3890 } 3891 if (flags.recurse) { 3892 3893 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 3894 if (parentname == NULL) { 3895 ret = -1; 3896 goto error; 3897 } 3898 delim = strchr(parentname, '@'); 3899 *delim = '\0'; 3900 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 3901 if (zhrp == NULL) { 3902 ret = -1; 3903 goto error; 3904 } 3905 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 3906 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 3907 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 3908 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 3909 return (-1); 3910 } 3911 3912 if (changelist_haszonedchild(cl)) { 3913 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3914 "child dataset with inherited mountpoint is used " 3915 "in a non-global zone")); 3916 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 3917 goto error; 3918 } 3919 3920 if ((ret = changelist_prefix(cl)) != 0) 3921 goto error; 3922 } 3923 3924 if (ZFS_IS_VOLUME(zhp)) 3925 zc.zc_objset_type = DMU_OST_ZVOL; 3926 else 3927 zc.zc_objset_type = DMU_OST_ZFS; 3928 3929 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3930 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 3931 3932 zc.zc_cookie = flags.recurse ? 1 : 0; 3933 if (flags.nounmount) 3934 zc.zc_cookie |= 2; 3935 3936 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 3937 /* 3938 * if it was recursive, the one that actually failed will 3939 * be in zc.zc_name 3940 */ 3941 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3942 "cannot rename '%s'"), zc.zc_name); 3943 3944 if (flags.recurse && errno == EEXIST) { 3945 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3946 "a child dataset already has a snapshot " 3947 "with the new name")); 3948 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3949 } else { 3950 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 3951 } 3952 3953 /* 3954 * On failure, we still want to remount any filesystems that 3955 * were previously mounted, so we don't alter the system state. 3956 */ 3957 if (cl != NULL) 3958 (void) changelist_postfix(cl); 3959 } else { 3960 if (cl != NULL) { 3961 changelist_rename(cl, zfs_get_name(zhp), target); 3962 ret = changelist_postfix(cl); 3963 } 3964 } 3965 3966error: 3967 if (parentname != NULL) { 3968 free(parentname); 3969 } 3970 if (zhrp != NULL) { 3971 zfs_close(zhrp); 3972 } 3973 if (cl != NULL) { 3974 changelist_free(cl); 3975 } 3976 return (ret); 3977} 3978 3979nvlist_t * 3980zfs_get_user_props(zfs_handle_t *zhp) 3981{ 3982 return (zhp->zfs_user_props); 3983} 3984 3985nvlist_t * 3986zfs_get_recvd_props(zfs_handle_t *zhp) 3987{ 3988 if (zhp->zfs_recvd_props == NULL) 3989 if (get_recvd_props_ioctl(zhp) != 0) 3990 return (NULL); 3991 return (zhp->zfs_recvd_props); 3992} 3993 3994/* 3995 * This function is used by 'zfs list' to determine the exact set of columns to 3996 * display, and their maximum widths. This does two main things: 3997 * 3998 * - If this is a list of all properties, then expand the list to include 3999 * all native properties, and set a flag so that for each dataset we look 4000 * for new unique user properties and add them to the list. 4001 * 4002 * - For non fixed-width properties, keep track of the maximum width seen 4003 * so that we can size the column appropriately. If the user has 4004 * requested received property values, we also need to compute the width 4005 * of the RECEIVED column. 4006 */ 4007int 4008zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4009 boolean_t literal) 4010{ 4011 libzfs_handle_t *hdl = zhp->zfs_hdl; 4012 zprop_list_t *entry; 4013 zprop_list_t **last, **start; 4014 nvlist_t *userprops, *propval; 4015 nvpair_t *elem; 4016 char *strval; 4017 char buf[ZFS_MAXPROPLEN]; 4018 4019 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4020 return (-1); 4021 4022 userprops = zfs_get_user_props(zhp); 4023 4024 entry = *plp; 4025 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4026 /* 4027 * Go through and add any user properties as necessary. We 4028 * start by incrementing our list pointer to the first 4029 * non-native property. 4030 */ 4031 start = plp; 4032 while (*start != NULL) { 4033 if ((*start)->pl_prop == ZPROP_INVAL) 4034 break; 4035 start = &(*start)->pl_next; 4036 } 4037 4038 elem = NULL; 4039 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4040 /* 4041 * See if we've already found this property in our list. 4042 */ 4043 for (last = start; *last != NULL; 4044 last = &(*last)->pl_next) { 4045 if (strcmp((*last)->pl_user_prop, 4046 nvpair_name(elem)) == 0) 4047 break; 4048 } 4049 4050 if (*last == NULL) { 4051 if ((entry = zfs_alloc(hdl, 4052 sizeof (zprop_list_t))) == NULL || 4053 ((entry->pl_user_prop = zfs_strdup(hdl, 4054 nvpair_name(elem)))) == NULL) { 4055 free(entry); 4056 return (-1); 4057 } 4058 4059 entry->pl_prop = ZPROP_INVAL; 4060 entry->pl_width = strlen(nvpair_name(elem)); 4061 entry->pl_all = B_TRUE; 4062 *last = entry; 4063 } 4064 } 4065 } 4066 4067 /* 4068 * Now go through and check the width of any non-fixed columns 4069 */ 4070 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4071 if (entry->pl_fixed && !literal) 4072 continue; 4073 4074 if (entry->pl_prop != ZPROP_INVAL) { 4075 if (zfs_prop_get(zhp, entry->pl_prop, 4076 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4077 if (strlen(buf) > entry->pl_width) 4078 entry->pl_width = strlen(buf); 4079 } 4080 if (received && zfs_prop_get_recvd(zhp, 4081 zfs_prop_to_name(entry->pl_prop), 4082 buf, sizeof (buf), literal) == 0) 4083 if (strlen(buf) > entry->pl_recvd_width) 4084 entry->pl_recvd_width = strlen(buf); 4085 } else { 4086 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4087 &propval) == 0) { 4088 verify(nvlist_lookup_string(propval, 4089 ZPROP_VALUE, &strval) == 0); 4090 if (strlen(strval) > entry->pl_width) 4091 entry->pl_width = strlen(strval); 4092 } 4093 if (received && zfs_prop_get_recvd(zhp, 4094 entry->pl_user_prop, 4095 buf, sizeof (buf), literal) == 0) 4096 if (strlen(buf) > entry->pl_recvd_width) 4097 entry->pl_recvd_width = strlen(buf); 4098 } 4099 } 4100 4101 return (0); 4102} 4103 4104int 4105zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4106 char *resource, void *export, void *sharetab, 4107 int sharemax, zfs_share_op_t operation) 4108{ 4109 zfs_cmd_t zc = { 0 }; 4110 int error; 4111 4112 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4113 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4114 if (resource) 4115 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4116 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4117 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4118 zc.zc_share.z_sharetype = operation; 4119 zc.zc_share.z_sharemax = sharemax; 4120 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4121 return (error); 4122} 4123 4124void 4125zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4126{ 4127 nvpair_t *curr; 4128 4129 /* 4130 * Keep a reference to the props-table against which we prune the 4131 * properties. 4132 */ 4133 zhp->zfs_props_table = props; 4134 4135 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4136 4137 while (curr) { 4138 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4139 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4140 4141 /* 4142 * User properties will result in ZPROP_INVAL, and since we 4143 * only know how to prune standard ZFS properties, we always 4144 * leave these in the list. This can also happen if we 4145 * encounter an unknown DSL property (when running older 4146 * software, for example). 4147 */ 4148 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4149 (void) nvlist_remove(zhp->zfs_props, 4150 nvpair_name(curr), nvpair_type(curr)); 4151 curr = next; 4152 } 4153} 4154 4155#ifdef sun 4156static int 4157zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4158 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4159{ 4160 zfs_cmd_t zc = { 0 }; 4161 nvlist_t *nvlist = NULL; 4162 int error; 4163 4164 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4165 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4166 zc.zc_cookie = (uint64_t)cmd; 4167 4168 if (cmd == ZFS_SMB_ACL_RENAME) { 4169 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4170 (void) no_memory(hdl); 4171 return (NULL); 4172 } 4173 } 4174 4175 switch (cmd) { 4176 case ZFS_SMB_ACL_ADD: 4177 case ZFS_SMB_ACL_REMOVE: 4178 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4179 break; 4180 case ZFS_SMB_ACL_RENAME: 4181 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4182 resource1) != 0) { 4183 (void) no_memory(hdl); 4184 return (-1); 4185 } 4186 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4187 resource2) != 0) { 4188 (void) no_memory(hdl); 4189 return (-1); 4190 } 4191 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4192 nvlist_free(nvlist); 4193 return (-1); 4194 } 4195 break; 4196 case ZFS_SMB_ACL_PURGE: 4197 break; 4198 default: 4199 return (-1); 4200 } 4201 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4202 if (nvlist) 4203 nvlist_free(nvlist); 4204 return (error); 4205} 4206 4207int 4208zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4209 char *path, char *resource) 4210{ 4211 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4212 resource, NULL)); 4213} 4214 4215int 4216zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4217 char *path, char *resource) 4218{ 4219 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4220 resource, NULL)); 4221} 4222 4223int 4224zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4225{ 4226 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4227 NULL, NULL)); 4228} 4229 4230int 4231zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4232 char *oldname, char *newname) 4233{ 4234 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4235 oldname, newname)); 4236} 4237#endif /* sun */ 4238 4239int 4240zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4241 zfs_userspace_cb_t func, void *arg) 4242{ 4243 zfs_cmd_t zc = { 0 }; 4244 zfs_useracct_t buf[100]; 4245 libzfs_handle_t *hdl = zhp->zfs_hdl; 4246 int ret; 4247 4248 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4249 4250 zc.zc_objset_type = type; 4251 zc.zc_nvlist_dst = (uintptr_t)buf; 4252 4253 for (;;) { 4254 zfs_useracct_t *zua = buf; 4255 4256 zc.zc_nvlist_dst_size = sizeof (buf); 4257 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4258 char errbuf[1024]; 4259 4260 (void) snprintf(errbuf, sizeof (errbuf), 4261 dgettext(TEXT_DOMAIN, 4262 "cannot get used/quota for %s"), zc.zc_name); 4263 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4264 } 4265 if (zc.zc_nvlist_dst_size == 0) 4266 break; 4267 4268 while (zc.zc_nvlist_dst_size > 0) { 4269 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4270 zua->zu_space)) != 0) 4271 return (ret); 4272 zua++; 4273 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4274 } 4275 } 4276 4277 return (0); 4278} 4279 4280struct holdarg { 4281 nvlist_t *nvl; 4282 const char *snapname; 4283 const char *tag; 4284 boolean_t recursive; 4285 int error; 4286}; 4287 4288static int 4289zfs_hold_one(zfs_handle_t *zhp, void *arg) 4290{ 4291 struct holdarg *ha = arg; 4292 char name[ZFS_MAXNAMELEN]; 4293 int rv = 0; 4294 4295 (void) snprintf(name, sizeof (name), 4296 "%s@%s", zhp->zfs_name, ha->snapname); 4297 4298 if (lzc_exists(name)) 4299 fnvlist_add_string(ha->nvl, name, ha->tag); 4300 4301 if (ha->recursive) 4302 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4303 zfs_close(zhp); 4304 return (rv); 4305} 4306 4307int 4308zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4309 boolean_t recursive, int cleanup_fd) 4310{ 4311 int ret; 4312 struct holdarg ha; 4313 4314 ha.nvl = fnvlist_alloc(); 4315 ha.snapname = snapname; 4316 ha.tag = tag; 4317 ha.recursive = recursive; 4318 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4319 4320 if (nvlist_empty(ha.nvl)) { 4321 char errbuf[1024]; 4322 4323 fnvlist_free(ha.nvl); 4324 ret = ENOENT; 4325 (void) snprintf(errbuf, sizeof (errbuf), 4326 dgettext(TEXT_DOMAIN, 4327 "cannot hold snapshot '%s@%s'"), 4328 zhp->zfs_name, snapname); 4329 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4330 return (ret); 4331 } 4332 4333 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4334 fnvlist_free(ha.nvl); 4335 4336 return (ret); 4337} 4338 4339int 4340zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4341{ 4342 int ret; 4343 nvlist_t *errors; 4344 libzfs_handle_t *hdl = zhp->zfs_hdl; 4345 char errbuf[1024]; 4346 nvpair_t *elem; 4347 4348 errors = NULL; 4349 ret = lzc_hold(holds, cleanup_fd, &errors); 4350 4351 if (ret == 0) { 4352 /* There may be errors even in the success case. */ 4353 fnvlist_free(errors); 4354 return (0); 4355 } 4356 4357 if (nvlist_empty(errors)) { 4358 /* no hold-specific errors */ 4359 (void) snprintf(errbuf, sizeof (errbuf), 4360 dgettext(TEXT_DOMAIN, "cannot hold")); 4361 switch (ret) { 4362 case ENOTSUP: 4363 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4364 "pool must be upgraded")); 4365 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4366 break; 4367 case EINVAL: 4368 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4369 break; 4370 default: 4371 (void) zfs_standard_error(hdl, ret, errbuf); 4372 } 4373 } 4374 4375 for (elem = nvlist_next_nvpair(errors, NULL); 4376 elem != NULL; 4377 elem = nvlist_next_nvpair(errors, elem)) { 4378 (void) snprintf(errbuf, sizeof (errbuf), 4379 dgettext(TEXT_DOMAIN, 4380 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4381 switch (fnvpair_value_int32(elem)) { 4382 case E2BIG: 4383 /* 4384 * Temporary tags wind up having the ds object id 4385 * prepended. So even if we passed the length check 4386 * above, it's still possible for the tag to wind 4387 * up being slightly too long. 4388 */ 4389 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4390 break; 4391 case EINVAL: 4392 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4393 break; 4394 case EEXIST: 4395 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4396 break; 4397 default: 4398 (void) zfs_standard_error(hdl, 4399 fnvpair_value_int32(elem), errbuf); 4400 } 4401 } 4402 4403 fnvlist_free(errors); 4404 return (ret); 4405} 4406 4407static int 4408zfs_release_one(zfs_handle_t *zhp, void *arg) 4409{ 4410 struct holdarg *ha = arg; 4411 char name[ZFS_MAXNAMELEN]; 4412 int rv = 0; 4413 nvlist_t *existing_holds; 4414 4415 (void) snprintf(name, sizeof (name), 4416 "%s@%s", zhp->zfs_name, ha->snapname); 4417 4418 if (lzc_get_holds(name, &existing_holds) != 0) { 4419 ha->error = ENOENT; 4420 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4421 ha->error = ESRCH; 4422 } else { 4423 nvlist_t *torelease = fnvlist_alloc(); 4424 fnvlist_add_boolean(torelease, ha->tag); 4425 fnvlist_add_nvlist(ha->nvl, name, torelease); 4426 fnvlist_free(torelease); 4427 } 4428 4429 if (ha->recursive) 4430 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4431 zfs_close(zhp); 4432 return (rv); 4433} 4434 4435int 4436zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4437 boolean_t recursive) 4438{ 4439 int ret; 4440 struct holdarg ha; 4441 nvlist_t *errors = NULL; 4442 nvpair_t *elem; 4443 libzfs_handle_t *hdl = zhp->zfs_hdl; 4444 char errbuf[1024]; 4445 4446 ha.nvl = fnvlist_alloc(); 4447 ha.snapname = snapname; 4448 ha.tag = tag; 4449 ha.recursive = recursive; 4450 ha.error = 0; 4451 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4452 4453 if (nvlist_empty(ha.nvl)) { 4454 fnvlist_free(ha.nvl); 4455 ret = ha.error; 4456 (void) snprintf(errbuf, sizeof (errbuf), 4457 dgettext(TEXT_DOMAIN, 4458 "cannot release hold from snapshot '%s@%s'"), 4459 zhp->zfs_name, snapname); 4460 if (ret == ESRCH) { 4461 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4462 } else { 4463 (void) zfs_standard_error(hdl, ret, errbuf); 4464 } 4465 return (ret); 4466 } 4467 4468 ret = lzc_release(ha.nvl, &errors); 4469 fnvlist_free(ha.nvl); 4470 4471 if (ret == 0) { 4472 /* There may be errors even in the success case. */ 4473 fnvlist_free(errors); 4474 return (0); 4475 } 4476 4477 if (nvlist_empty(errors)) { 4478 /* no hold-specific errors */ 4479 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4480 "cannot release")); 4481 switch (errno) { 4482 case ENOTSUP: 4483 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4484 "pool must be upgraded")); 4485 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4486 break; 4487 default: 4488 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4489 } 4490 } 4491 4492 for (elem = nvlist_next_nvpair(errors, NULL); 4493 elem != NULL; 4494 elem = nvlist_next_nvpair(errors, elem)) { 4495 (void) snprintf(errbuf, sizeof (errbuf), 4496 dgettext(TEXT_DOMAIN, 4497 "cannot release hold from snapshot '%s'"), 4498 nvpair_name(elem)); 4499 switch (fnvpair_value_int32(elem)) { 4500 case ESRCH: 4501 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4502 break; 4503 case EINVAL: 4504 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4505 break; 4506 default: 4507 (void) zfs_standard_error_fmt(hdl, 4508 fnvpair_value_int32(elem), errbuf); 4509 } 4510 } 4511 4512 fnvlist_free(errors); 4513 return (ret); 4514} 4515 4516int 4517zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4518{ 4519 zfs_cmd_t zc = { 0 }; 4520 libzfs_handle_t *hdl = zhp->zfs_hdl; 4521 int nvsz = 2048; 4522 void *nvbuf; 4523 int err = 0; 4524 char errbuf[1024]; 4525 4526 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4527 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4528 4529tryagain: 4530 4531 nvbuf = malloc(nvsz); 4532 if (nvbuf == NULL) { 4533 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4534 goto out; 4535 } 4536 4537 zc.zc_nvlist_dst_size = nvsz; 4538 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4539 4540 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN); 4541 4542 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4543 (void) snprintf(errbuf, sizeof (errbuf), 4544 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4545 zc.zc_name); 4546 switch (errno) { 4547 case ENOMEM: 4548 free(nvbuf); 4549 nvsz = zc.zc_nvlist_dst_size; 4550 goto tryagain; 4551 4552 case ENOTSUP: 4553 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4554 "pool must be upgraded")); 4555 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4556 break; 4557 case EINVAL: 4558 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4559 break; 4560 case ENOENT: 4561 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4562 break; 4563 default: 4564 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4565 break; 4566 } 4567 } else { 4568 /* success */ 4569 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4570 if (rc) { 4571 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4572 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4573 zc.zc_name); 4574 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4575 } 4576 } 4577 4578 free(nvbuf); 4579out: 4580 return (err); 4581} 4582 4583int 4584zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4585{ 4586 zfs_cmd_t zc = { 0 }; 4587 libzfs_handle_t *hdl = zhp->zfs_hdl; 4588 char *nvbuf; 4589 char errbuf[1024]; 4590 size_t nvsz; 4591 int err; 4592 4593 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4594 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4595 4596 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4597 assert(err == 0); 4598 4599 nvbuf = malloc(nvsz); 4600 4601 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4602 assert(err == 0); 4603 4604 zc.zc_nvlist_src_size = nvsz; 4605 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4606 zc.zc_perm_action = un; 4607 4608 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4609 4610 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4611 (void) snprintf(errbuf, sizeof (errbuf), 4612 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4613 zc.zc_name); 4614 switch (errno) { 4615 case ENOTSUP: 4616 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4617 "pool must be upgraded")); 4618 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4619 break; 4620 case EINVAL: 4621 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4622 break; 4623 case ENOENT: 4624 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4625 break; 4626 default: 4627 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4628 break; 4629 } 4630 } 4631 4632 free(nvbuf); 4633 4634 return (err); 4635} 4636 4637int 4638zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4639{ 4640 int err; 4641 char errbuf[1024]; 4642 4643 err = lzc_get_holds(zhp->zfs_name, nvl); 4644 4645 if (err != 0) { 4646 libzfs_handle_t *hdl = zhp->zfs_hdl; 4647 4648 (void) snprintf(errbuf, sizeof (errbuf), 4649 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4650 zhp->zfs_name); 4651 switch (err) { 4652 case ENOTSUP: 4653 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4654 "pool must be upgraded")); 4655 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4656 break; 4657 case EINVAL: 4658 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4659 break; 4660 case ENOENT: 4661 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4662 break; 4663 default: 4664 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4665 break; 4666 } 4667 } 4668 4669 return (err); 4670} 4671 4672/* 4673 * Convert the zvol's volume size to an appropriate reservation. 4674 * Note: If this routine is updated, it is necessary to update the ZFS test 4675 * suite's shell version in reservation.kshlib. 4676 */ 4677uint64_t 4678zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4679{ 4680 uint64_t numdb; 4681 uint64_t nblocks, volblocksize; 4682 int ncopies; 4683 char *strval; 4684 4685 if (nvlist_lookup_string(props, 4686 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4687 ncopies = atoi(strval); 4688 else 4689 ncopies = 1; 4690 if (nvlist_lookup_uint64(props, 4691 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4692 &volblocksize) != 0) 4693 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4694 nblocks = volsize/volblocksize; 4695 /* start with metadnode L0-L6 */ 4696 numdb = 7; 4697 /* calculate number of indirects */ 4698 while (nblocks > 1) { 4699 nblocks += DNODES_PER_LEVEL - 1; 4700 nblocks /= DNODES_PER_LEVEL; 4701 numdb += nblocks; 4702 } 4703 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4704 volsize *= ncopies; 4705 /* 4706 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4707 * compressed, but in practice they compress down to about 4708 * 1100 bytes 4709 */ 4710 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4711 volsize += numdb; 4712 return (volsize); 4713} 4714 4715/* 4716 * Attach/detach the given filesystem to/from the given jail. 4717 */ 4718int 4719zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4720{ 4721 libzfs_handle_t *hdl = zhp->zfs_hdl; 4722 zfs_cmd_t zc = { 0 }; 4723 char errbuf[1024]; 4724 unsigned long cmd; 4725 int ret; 4726 4727 if (attach) { 4728 (void) snprintf(errbuf, sizeof (errbuf), 4729 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4730 } else { 4731 (void) snprintf(errbuf, sizeof (errbuf), 4732 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4733 } 4734 4735 switch (zhp->zfs_type) { 4736 case ZFS_TYPE_VOLUME: 4737 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4738 "volumes can not be jailed")); 4739 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4740 case ZFS_TYPE_SNAPSHOT: 4741 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4742 "snapshots can not be jailed")); 4743 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4744 } 4745 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4746 4747 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4748 zc.zc_objset_type = DMU_OST_ZFS; 4749 zc.zc_jailid = jailid; 4750 4751 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4752 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4753 zfs_standard_error(hdl, errno, errbuf); 4754 4755 return (ret); 4756} 4757